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2 Commits
master ... getters

Author SHA1 Message Date
Dan Ballard a6ef43c637 format, tests 2017-02-01 02:25:28 -08:00
Dan Ballard c079f0dace add getter for serverHostname so classes based on this can access their address 2017-01-31 20:10:27 -08:00
94 changed files with 1462 additions and 12902 deletions
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2
.travis.yml
View File

@ -16,6 +16,6 @@ install:
script:
- cd $TRAVIS_BUILD_DIR && ./testing/tests.sh
- cd $TRAVIS_BUILD_DIR && ./tests.sh
- test -z "$GOFMT"
- goveralls -coverprofile=./coverage.out -service travis-ci

30
Godeps/Godeps.json generated
View File

@ -1,30 +0,0 @@
{
"ImportPath": "github.com/s-rah/go-ricochet",
"GoVersion": "go1.7",
"GodepVersion": "v79",
"Packages": [
"./..."
],
"Deps": [
{
"ImportPath": "github.com/golang/protobuf/proto",
"Rev": "8ee79997227bf9b34611aee7946ae64735e6fd93"
},
{
"ImportPath": "github.com/yawning/bulb",
"Rev": "85d80d893c3d4a478b8c0abbc43f0ea13e1ce4f9"
},
{
"ImportPath": "github.com/yawning/bulb/utils",
"Rev": "85d80d893c3d4a478b8c0abbc43f0ea13e1ce4f9"
},
{
"ImportPath": "github.com/yawning/bulb/utils/pkcs1",
"Rev": "85d80d893c3d4a478b8c0abbc43f0ea13e1ce4f9"
},
{
"ImportPath": "golang.org/x/net/proxy",
"Rev": "60c41d1de8da134c05b7b40154a9a82bf5b7edb9"
}
]
}

5
Godeps/Readme generated
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@ -1,5 +0,0 @@
This directory tree is generated automatically by godep.
Please do not edit.
See https://github.com/tools/godep for more information.

10
LICENSE
View File

@ -25,8 +25,8 @@ SOFTWARE.
--------------------------------------------------------------------------------
Autogenerated protobuf code was generated using the proto file from Ricochet.
They are covered under the following license.
Autogenerated protobuf code was generated using the proto file from Ricochet.
They are covered under the following license.
Ricochet - https://ricochet.im/
Copyright (C) 2014, John Brooks <john.brooks@dereferenced.net>
@ -61,4 +61,10 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--------------------------------------------------------------------------------
The go-ricochet logo is based on an image by Olga Shalakhina
<osshalakhina@gmail.com> who in turn modified the original gopher images made by
Renee French. The image is licensed under Creative Commons 3.0 Attributions.
--------------------------------------------------------------------------------
go-ricochet is not affiliated with or endorsed by Ricochet.im or the Tor Project.

2
README.md
View File

@ -1,5 +1,7 @@
# GoRicochet [![Build Status](https://travis-ci.org/s-rah/go-ricochet.svg?branch=master)](https://travis-ci.org/s-rah/go-ricochet) [![Go Report Card](https://goreportcard.com/badge/github.com/s-rah/go-ricochet)](https://goreportcard.com/report/github.com/s-rah/go-ricochet) [![Coverage Status](https://coveralls.io/repos/github/s-rah/go-ricochet/badge.svg?branch=master)](https://coveralls.io/github/s-rah/go-ricochet?branch=master)
![GoRicochet](logo.png)
GoRicochet is an experimental implementation of the [Ricochet Protocol](https://ricochet.im)
in Go.

23
application/acceptallcontactmanager.go
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@ -1,23 +0,0 @@
package application
import (
"crypto/rsa"
)
// AcceptAllContactManager implements the contact manager interface an presumes
// all connections are allowed.
type AcceptAllContactManager struct {
}
// LookupContact returns that a contact is known and allowed to communicate for all cases.
func (aacm *AcceptAllContactManager) LookupContact(hostname string, publicKey rsa.PublicKey) (allowed, known bool) {
return true, true
}
func (aacm *AcceptAllContactManager) GetContactDetails() (string, string) {
return "", ""
}
func (aacm *AcceptAllContactManager) ContactRequest(name string, message string) string {
return "Accepted"
}

145
application/application.go
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@ -1,145 +0,0 @@
package application
import (
"crypto/rsa"
"github.com/s-rah/go-ricochet"
"github.com/s-rah/go-ricochet/channels"
"github.com/s-rah/go-ricochet/connection"
"log"
"net"
"time"
)
// RicochetApplication bundles many useful constructs that are
// likely standard in a ricochet application
type RicochetApplication struct {
contactManager ContactManagerInterface
privateKey *rsa.PrivateKey
chatMessageHandler func(*RicochetApplicationInstance, uint32, time.Time, string)
chatMessageAckHandler func(*RicochetApplicationInstance, uint32)
l net.Listener
}
type RicochetApplicationInstance struct {
connection.AutoConnectionHandler
connection *connection.Connection
RemoteHostname string
ChatMessageHandler func(*RicochetApplicationInstance, uint32, time.Time, string)
ChatMessageAckHandler func(*RicochetApplicationInstance, uint32)
}
func (rai *RicochetApplicationInstance) GetContactDetails() (string, string) {
return "EchoBot", "I LIVE 😈😈!!!!"
}
func (rai *RicochetApplicationInstance) ContactRequest(name string, message string) string {
return "Accepted"
}
func (rai *RicochetApplicationInstance) ContactRequestRejected() {
}
func (rai *RicochetApplicationInstance) ContactRequestAccepted() {
}
func (rai *RicochetApplicationInstance) ContactRequestError() {
}
func (rai *RicochetApplicationInstance) SendChatMessage(message string) {
// Technically this errors afte the second time but we can ignore it.
rai.connection.RequestOpenChannel("im.ricochet.chat", rai)
rai.connection.Do(func() error {
channel := rai.connection.Channel("im.ricochet.chat", channels.Outbound)
if channel != nil {
chatchannel, ok := (*channel.Handler).(*channels.ChatChannel)
if ok {
chatchannel.SendMessage(message)
}
}
return nil
})
}
func (rai *RicochetApplicationInstance) ChatMessage(messageID uint32, when time.Time, message string) bool {
go rai.ChatMessageHandler(rai, messageID, when, message)
return true
}
func (rai *RicochetApplicationInstance) ChatMessageAck(messageID uint32) {
rai.ChatMessageAckHandler(rai, messageID)
}
func (ra *RicochetApplication) Init(pk *rsa.PrivateKey, cm ContactManagerInterface) {
ra.privateKey = pk
ra.contactManager = cm
ra.chatMessageHandler = func(*RicochetApplicationInstance, uint32, time.Time, string) {}
ra.chatMessageAckHandler = func(*RicochetApplicationInstance, uint32) {}
}
func (ra *RicochetApplication) OnChatMessage(call func(*RicochetApplicationInstance, uint32, time.Time, string)) {
ra.chatMessageHandler = call
}
func (ra *RicochetApplication) OnChatMessageAck(call func(*RicochetApplicationInstance, uint32)) {
ra.chatMessageAckHandler = call
}
func (ra *RicochetApplication) handleConnection(conn net.Conn) {
rc, err := goricochet.NegotiateVersionInbound(conn)
if err != nil {
log.Printf("There was an error")
conn.Close()
return
}
ich := connection.HandleInboundConnection(rc)
err = ich.ProcessAuthAsServer(ra.privateKey, ra.contactManager.LookupContact)
if err != nil {
log.Printf("There was an error")
conn.Close()
return
}
rai := new(RicochetApplicationInstance)
rai.Init(ra.privateKey, "")
rai.RemoteHostname = rc.RemoteHostname
rai.connection = rc
rai.ChatMessageHandler = ra.chatMessageHandler
rai.ChatMessageAckHandler = ra.chatMessageAckHandler
rai.RegisterChannelHandler("im.ricochet.contact.request", func() channels.Handler {
contact := new(channels.ContactRequestChannel)
contact.Handler = rai
return contact
})
rai.RegisterChannelHandler("im.ricochet.chat", func() channels.Handler {
chat := new(channels.ChatChannel)
chat.Handler = rai
return chat
})
rc.Process(rai)
}
func (ra *RicochetApplication) Shutdown () {
log.Printf("Closing")
ra.l.Close()
log.Printf("Closed")
}
func (ra *RicochetApplication) Run(l net.Listener) {
if ra.privateKey == nil || ra.contactManager == nil {
return
}
ra.l = l
var err error
for err == nil {
conn, err := ra.l.Accept()
if err == nil {
go ra.handleConnection(conn)
} else {
log.Printf("Closing")
return
}
}
}

11
application/contactmanagerinterface.go
View File

@ -1,11 +0,0 @@
package application
import (
"crypto/rsa"
)
// ContactManagerInterface provides a mechanism for autonous applications
// to make decisions on what connections to accept or reject.
type ContactManagerInterface interface {
LookupContact(hostname string, publicKey rsa.PublicKey) (allowed, known bool)
}

31
application/examples/echobot/main.go
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@ -1,31 +0,0 @@
package main
import (
"github.com/s-rah/go-ricochet/application"
"github.com/s-rah/go-ricochet/utils"
"log"
"time"
)
func main() {
echobot := new(application.RicochetApplication)
pk, err := utils.LoadPrivateKeyFromFile("./testing/private_key")
if err != nil {
log.Fatalf("error reading private key file: %v", err)
}
l, err := application.SetupOnion("127.0.0.1:9051", "tcp4", "", pk, 9878)
if err != nil {
log.Fatalf("error setting up onion service: %v", err)
}
echobot.Init(pk, new(application.AcceptAllContactManager))
echobot.OnChatMessage(func(rai *application.RicochetApplicationInstance, id uint32, timestamp time.Time, message string) {
log.Printf("message from %v - %v", rai.RemoteHostname, message)
rai.SendChatMessage(message)
})
log.Printf("echobot listening on %s", l.Addr().String())
echobot.Run(l)
}

27
application/ricochetonion.go
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@ -1,27 +0,0 @@
package application
import (
"crypto/rsa"
"github.com/yawning/bulb"
"net"
)
// "127.0.0.1:9051" "tcp4"
// "/var/run/tor/control" "unix"
func SetupOnion(torControlAddress string, torControlSocketType string, authentication string, pk *rsa.PrivateKey, onionport uint16) (net.Listener, error) {
c, err := bulb.Dial(torControlSocketType, torControlAddress)
if err != nil {
return nil, err
}
if err := c.Authenticate(authentication); err != nil {
return nil, err
}
cfg := &bulb.NewOnionConfig{
DiscardPK: true,
PrivateKey: pk,
}
return c.NewListener(cfg, onionport)
}

2
wire/auth/auth_message.go → auth/auth_message.go
View File

@ -18,7 +18,7 @@ package Protocol_Data_AuthHiddenService
import proto "github.com/golang/protobuf/proto"
import fmt "fmt"
import math "math"
import Protocol_Data_Control "github.com/s-rah/go-ricochet/wire/control"
import Protocol_Data_Control "github.com/s-rah/go-ricochet/control"
// Reference imports to suppress errors if they are not otherwise used.
var _ = proto.Marshal

57
authhandler.go Normal file
View File

@ -0,0 +1,57 @@
package goricochet
import (
"crypto/hmac"
"crypto/rand"
"crypto/sha256"
"io"
)
// AuthenticationHandler manages the state required for the AuthHiddenService
// authentication scheme for ricochet.
type AuthenticationHandler struct {
clientCookie [16]byte
serverCookie [16]byte
}
// AddClientCookie adds a client cookie to the state.
func (ah *AuthenticationHandler) AddClientCookie(cookie []byte) {
copy(ah.clientCookie[:], cookie[:16])
}
// AddServerCookie adds a server cookie to the state.
func (ah *AuthenticationHandler) AddServerCookie(cookie []byte) {
copy(ah.serverCookie[:], cookie[:16])
}
// GenRandom generates a random 16byte cookie string.
func (ah *AuthenticationHandler) GenRandom() [16]byte {
var cookie [16]byte
io.ReadFull(rand.Reader, cookie[:])
return cookie
}
// GenClientCookie generates and adds a client cookie to the state.
func (ah *AuthenticationHandler) GenClientCookie() [16]byte {
ah.clientCookie = ah.GenRandom()
return ah.clientCookie
}
// GenServerCookie generates and adds a server cookie to the state.
func (ah *AuthenticationHandler) GenServerCookie() [16]byte {
ah.serverCookie = ah.GenRandom()
return ah.serverCookie
}
// GenChallenge constructs the challenge parameter for the AuthHiddenService session.
// The challenge is the a Sha256HMAC(clientHostname+serverHostname, key=clientCookie+serverCookie)
func (ah *AuthenticationHandler) GenChallenge(clientHostname string, serverHostname string) []byte {
key := make([]byte, 32)
copy(key[0:16], ah.clientCookie[:])
copy(key[16:], ah.serverCookie[:])
value := []byte(clientHostname + serverHostname)
mac := hmac.New(sha256.New, key)
mac.Write(value)
hmac := mac.Sum(nil)
return hmac
}

32
authhandler_test.go Normal file
View File

@ -0,0 +1,32 @@
package goricochet
import "testing"
import "bytes"
func TestGenChallenge(t *testing.T) {
authHandler := new(AuthenticationHandler)
authHandler.AddClientCookie([]byte("abcdefghijklmnop"))
authHandler.AddServerCookie([]byte("qrstuvwxyz012345"))
challenge := authHandler.GenChallenge("test.onion", "notareal.onion")
expectedChallenge := []byte{0xf5, 0xdb, 0xfd, 0xf0, 0x3d, 0x94, 0x14, 0xf1, 0x4b, 0x37, 0x93, 0xe2, 0xa5, 0x11, 0x4a, 0x98, 0x31, 0x90, 0xea, 0xb8, 0x95, 0x7a, 0x2e, 0xaa, 0xd0, 0xd2, 0x0c, 0x74, 0x95, 0xba, 0xab, 0x73}
t.Log(challenge, expectedChallenge)
if bytes.Compare(challenge[:], expectedChallenge[:]) != 0 {
t.Errorf("AuthenticationHandler Challenge Is Invalid, Got %x, Expected %x", challenge, expectedChallenge)
}
}
func TestGenClientCookie(t *testing.T) {
authHandler := new(AuthenticationHandler)
clientCookie := authHandler.GenClientCookie()
if clientCookie != authHandler.clientCookie {
t.Errorf("AuthenticationHandler Client Cookies are Different %x %x", clientCookie, authHandler.clientCookie)
}
}
func TestGenServerCookie(t *testing.T) {
authHandler := new(AuthenticationHandler)
serverCookie := authHandler.GenServerCookie()
if serverCookie != authHandler.serverCookie {
t.Errorf("AuthenticationHandler Server Cookies are Different %x %x", serverCookie, authHandler.serverCookie)
}
}

35
channels/channel.go
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@ -1,35 +0,0 @@
package channels
// Direction indicated whether we or the remote peer opened the channel
type Direction int
const (
// Inbound indcates the channel was opened by the remote peer
Inbound Direction = iota
// Outbound indicated the channel was opened by us
Outbound
)
// AuthChannelResult captures the result of an authentication flow
type AuthChannelResult struct {
Hostname string
Accepted bool
IsKnownContact bool
}
// Channel holds the state of a channel on an open connection
type Channel struct {
ID int32
Type string
Direction Direction
Handler *Handler
Pending bool
ServerHostname string
ClientHostname string
// Functions for updating the underlying Connection
SendMessage func([]byte)
CloseChannel func()
DelegateAuthorization func()
}

146
channels/chatchannel.go
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@ -1,146 +0,0 @@
package channels
import (
"crypto/rand"
"github.com/golang/protobuf/proto"
"github.com/s-rah/go-ricochet/utils"
"github.com/s-rah/go-ricochet/wire/chat"
"github.com/s-rah/go-ricochet/wire/control"
"math"
"math/big"
"time"
)
// ChatChannel implements the ChannelHandler interface for a channel of
// type "im.ricochet.chat". The channel may be inbound or outbound.
//
// ChatChannel implements protocol-level sanity and state validation, but
// does not handle or acknowledge chat messages. The application must provide
// a ChatChannelHandler implementation to handle chat events.
type ChatChannel struct {
// Methods of Handler are called for chat events on this channel
Handler ChatChannelHandler
channel *Channel
lastMessageID uint32
}
// ChatChannelHandler is implemented by an application type to receive
// events from a ChatChannel.
//
// Note that ChatChannelHandler is composable with other interfaces, including
// ConnectionHandler; there is no need to use a distinct type as a
// ChatChannelHandler.
type ChatChannelHandler interface {
// ChatMessage is called when a chat message is received. Return true to acknowledge
// the message successfully, and false to NACK and refuse the message.
ChatMessage(messageID uint32, when time.Time, message string) bool
// ChatMessageAck is called when an acknowledgement of a sent message is received.
ChatMessageAck(messageID uint32)
}
// SendMessage sends a given message using this channe
func (cc *ChatChannel) SendMessage(message string) {
messageBuilder := new(utils.MessageBuilder)
//TODO Implement Chat Number
data := messageBuilder.ChatMessage(message, cc.lastMessageID)
cc.lastMessageID++
cc.channel.SendMessage(data)
}
// Acknowledge indicates the given messageID was received
func (cc *ChatChannel) Acknowledge(messageID uint32) {
messageBuilder := new(utils.MessageBuilder)
cc.channel.SendMessage(messageBuilder.AckChatMessage(messageID))
}
// Type returns the type string for this channel, e.g. "im.ricochet.chat".
func (cc *ChatChannel) Type() string {
return "im.ricochet.chat"
}
// Closed is called when the channel is closed for any reason.
func (cc *ChatChannel) Closed(err error) {
}
// OnlyClientCanOpen - for chat channels any side can open
func (cc *ChatChannel) OnlyClientCanOpen() bool {
return false
}
// Singleton - for chat channels there can only be one instance per direction
func (cc *ChatChannel) Singleton() bool {
return true
}
// Bidirectional - for chat channels are not bidrectional
func (cc *ChatChannel) Bidirectional() bool {
return false
}
// RequiresAuthentication - chat channels require hidden service auth
func (cc *ChatChannel) RequiresAuthentication() string {
return "im.ricochet.auth.hidden-service"
}
// OpenInbound is the first method called for an inbound channel request.
// If an error is returned, the channel is rejected. If a RawMessage is
// returned, it will be sent as the ChannelResult message.
func (cc *ChatChannel) OpenInbound(channel *Channel, raw *Protocol_Data_Control.OpenChannel) ([]byte, error) {
cc.channel = channel
id, err := rand.Int(rand.Reader, big.NewInt(math.MaxUint32))
if err != nil {
return nil, err
}
cc.lastMessageID = uint32(id.Uint64())
cc.channel.Pending = false
messageBuilder := new(utils.MessageBuilder)
return messageBuilder.AckOpenChannel(channel.ID), nil
}
// OpenOutbound is the first method called for an outbound channel request.
// If an error is returned, the channel is not opened. If a RawMessage is
// returned, it will be sent as the OpenChannel message.
func (cc *ChatChannel) OpenOutbound(channel *Channel) ([]byte, error) {
cc.channel = channel
id, err := rand.Int(rand.Reader, big.NewInt(math.MaxUint32))
if err != nil {
return nil, err
}
cc.lastMessageID = uint32(id.Uint64())
messageBuilder := new(utils.MessageBuilder)
return messageBuilder.OpenChannel(channel.ID, cc.Type()), nil
}
// OpenOutboundResult is called when a response is received for an
// outbound OpenChannel request. If `err` is non-nil, the channel was
// rejected and Closed will be called immediately afterwards. `raw`
// contains the raw protocol message including any extension data.
func (cc *ChatChannel) OpenOutboundResult(err error, crm *Protocol_Data_Control.ChannelResult) {
if err == nil {
if crm.GetOpened() {
cc.channel.Pending = false
}
}
}
// Packet is called for each raw packet received on this channel.
func (cc *ChatChannel) Packet(data []byte) {
if !cc.channel.Pending {
res := new(Protocol_Data_Chat.Packet)
err := proto.Unmarshal(data, res)
if err == nil {
if res.GetChatMessage() != nil {
ack := cc.Handler.ChatMessage(res.GetChatMessage().GetMessageId(), time.Now(), res.GetChatMessage().GetMessageText())
if ack {
cc.Acknowledge(res.GetChatMessage().GetMessageId())
} else {
//XXX
}
} else if res.GetChatAcknowledge() != nil {
cc.Handler.ChatMessageAck(res.GetChatMessage().GetMessageId())
}
// XXX?
}
}
}

124
channels/chatchannel_test.go
View File

@ -1,124 +0,0 @@
package channels
import (
"github.com/golang/protobuf/proto"
"github.com/s-rah/go-ricochet/utils"
"github.com/s-rah/go-ricochet/wire/chat"
"github.com/s-rah/go-ricochet/wire/control"
"testing"
"time"
)
func TestChatChannelOptions(t *testing.T) {
chatChannel := new(ChatChannel)
if chatChannel.Type() != "im.ricochet.chat" {
t.Errorf("ChatChannel has wrong type %s", chatChannel.Type())
}
if chatChannel.OnlyClientCanOpen() {
t.Errorf("ChatChannel should be able to be opened by everyone")
}
if !chatChannel.Singleton() {
t.Errorf("ChatChannel should be a Singelton")
}
if chatChannel.Bidirectional() {
t.Errorf("ChatChannel should not be bidirectional")
}
if chatChannel.RequiresAuthentication() != "im.ricochet.auth.hidden-service" {
t.Errorf("ChatChannel should require im.ricochet.auth.hidden-service. Instead requires: %s", chatChannel.RequiresAuthentication())
}
}
func TestChatChannelOpenInbound(t *testing.T) {
messageBuilder := new(utils.MessageBuilder)
ocm := messageBuilder.OpenChannel(2, "im.ricochet.chat")
// We have just constructed this so there is little
// point in doing error checking here in the test
res := new(Protocol_Data_Control.Packet)
proto.Unmarshal(ocm[:], res)
opm := res.GetOpenChannel()
chatChannel := new(ChatChannel)
channel := Channel{ID: 1}
response, err := chatChannel.OpenInbound(&channel, opm)
if err == nil {
res := new(Protocol_Data_Control.Packet)
proto.Unmarshal(response[:], res)
} else {
t.Errorf("Error while parsing chatchannel openinbound output: %v", err)
}
}
func TestChatChannelOpenOutbound(t *testing.T) {
chatChannel := new(ChatChannel)
channel := Channel{ID: 1}
response, err := chatChannel.OpenOutbound(&channel)
if err == nil {
res := new(Protocol_Data_Control.Packet)
proto.Unmarshal(response[:], res)
if res.GetOpenChannel() != nil {
// XXX
} else {
t.Errorf("ChatChannel OpenOutbound was not an OpenChannelRequest %v", err)
}
} else {
t.Errorf("Error while parsing openputput output: %v", err)
}
}
type TestChatChannelHandler struct {
}
func (tcch *TestChatChannelHandler) ChatMessage(messageID uint32, when time.Time, message string) bool {
return true
}
func (tcch *TestChatChannelHandler) ChatMessageAck(messageID uint32) {
}
func TestChatChannelOperations(t *testing.T) {
// We test OpenOutboundElsewhere
chatChannel := new(ChatChannel)
chatChannel.Handler = new(TestChatChannelHandler)
channel := Channel{ID: 5}
channel.SendMessage = func(data []byte) {
res := new(Protocol_Data_Chat.Packet)
err := proto.Unmarshal(data, res)
if res.GetChatMessage() != nil {
if err == nil {
if res.GetChatMessage().GetMessageId() != 0 {
t.Log("Got Message ID:", res.GetChatMessage().GetMessageId())
return
}
t.Errorf("message id was 0 should be random")
return
}
t.Errorf("error sending chat message: %v", err)
}
}
chatChannel.OpenOutbound(&channel)
messageBuilder := new(utils.MessageBuilder)
ack := messageBuilder.AckOpenChannel(5)
// We have just constructed this so there is little
// point in doing error checking here in the test
res := new(Protocol_Data_Control.Packet)
proto.Unmarshal(ack[:], res)
cr := res.GetChannelResult()
chatChannel.OpenOutboundResult(nil, cr)
if channel.Pending {
t.Errorf("After Successful Result ChatChannel Is Still Pending")
}
chat := messageBuilder.ChatMessage("message text", 0)
chatChannel.Packet(chat)
chatChannel.SendMessage("hello")
}

154
channels/contactrequestchannel.go
View File

@ -1,154 +0,0 @@
package channels
import (
"github.com/golang/protobuf/proto"
"github.com/s-rah/go-ricochet/utils"
"github.com/s-rah/go-ricochet/wire/contact"
"github.com/s-rah/go-ricochet/wire/control"
)
// Defining Versions
const (
InvalidContactNameError = utils.Error("InvalidContactNameError")
InvalidContactMessageError = utils.Error("InvalidContactMessageError")
InvalidContactRequestError = utils.Error("InvalidContactRequestError")
)
// ContactRequestChannel implements the ChannelHandler interface for a channel of
// type "im.ricochet.contact.request". The channel may be inbound or outbound.
// a ContactRequestChannelHandler implementation to handle chat events.
type ContactRequestChannel struct {
// Methods of Handler are called for chat events on this channel
Handler ContactRequestChannelHandler
channel *Channel
}
// ContactRequestChannelHandler is implemented by an application type to receive
// events from a ContactRequestChannel.
//
// Note that ContactRequestChannelHandler is composable with other interfaces, including
// ConnectionHandler; there is no need to use a distinct type as a
// ContactRequestChannelHandler.
type ContactRequestChannelHandler interface {
GetContactDetails() (string, string)
ContactRequest(name string, message string) string
ContactRequestRejected()
ContactRequestAccepted()
ContactRequestError()
}
// OnlyClientCanOpen - only clients can open contact requests
func (crc *ContactRequestChannel) OnlyClientCanOpen() bool {
return true
}
// Singleton - only one contact request can be opened per side
func (crc *ContactRequestChannel) Singleton() bool {
return true
}
// Bidirectional - only clients can send messages
func (crc *ContactRequestChannel) Bidirectional() bool {
return false
}
// RequiresAuthentication - contact requests require hidden service auth
func (crc *ContactRequestChannel) RequiresAuthentication() string {
return "im.ricochet.auth.hidden-service"
}
// Type returns the type string for this channel, e.g. "im.ricochet.chat".
func (crc *ContactRequestChannel) Type() string {
return "im.ricochet.contact.request"
}
// Closed is called when the channel is closed for any reason.
func (crc *ContactRequestChannel) Closed(err error) {
}
// OpenInbound is the first method called for an inbound channel request.
// If an error is returned, the channel is rejected. If a RawMessage is
// returned, it will be sent as the ChannelResult message.
func (crc *ContactRequestChannel) OpenInbound(channel *Channel, oc *Protocol_Data_Control.OpenChannel) ([]byte, error) {
crc.channel = channel
contactRequestI, err := proto.GetExtension(oc, Protocol_Data_ContactRequest.E_ContactRequest)
if err == nil {
contactRequest, check := contactRequestI.(*Protocol_Data_ContactRequest.ContactRequest)
if check {
if len(contactRequest.GetNickname()) > int(Protocol_Data_ContactRequest.Limits_NicknameMaxCharacters) {
// Violation of the Protocol
return nil, InvalidContactNameError
}
if len(contactRequest.GetMessageText()) > int(Protocol_Data_ContactRequest.Limits_MessageMaxCharacters) {
// Violation of the Protocol
return nil, InvalidContactMessageError
}
result := crc.Handler.ContactRequest(contactRequest.GetNickname(), contactRequest.GetMessageText())
messageBuilder := new(utils.MessageBuilder)
return messageBuilder.ReplyToContactRequestOnResponse(channel.ID, result), nil
}
}
return nil, InvalidContactRequestError
}
// OpenOutbound is the first method called for an outbound channel request.
// If an error is returned, the channel is not opened. If a RawMessage is
// returned, it will be sent as the OpenChannel message.
func (crc *ContactRequestChannel) OpenOutbound(channel *Channel) ([]byte, error) {
crc.channel = channel
name, message := crc.Handler.GetContactDetails()
messageBuilder := new(utils.MessageBuilder)
return messageBuilder.OpenContactRequestChannel(channel.ID, name, message), nil
}
// OpenOutboundResult is called when a response is received for an
// outbound OpenChannel request. If `err` is non-nil, the channel was
// rejected and Closed will be called immediately afterwards. `raw`
// contains the raw protocol message including any extension data.
func (crc *ContactRequestChannel) OpenOutboundResult(err error, crm *Protocol_Data_Control.ChannelResult) {
if err == nil {
if crm.GetOpened() {
responseI, err := proto.GetExtension(crm, Protocol_Data_ContactRequest.E_Response)
if err == nil {
response, check := responseI.(*Protocol_Data_ContactRequest.Response)
if check {
crc.handleStatus(response.GetStatus().String())
return
}
}
}
}
crc.channel.SendMessage([]byte{})
}
func (crc *ContactRequestChannel) handleStatus(status string) {
switch status {
case "Accepted":
crc.Handler.ContactRequestAccepted()
case "Pending":
break
case "Rejected":
crc.Handler.ContactRequestRejected()
break
case "Error":
crc.Handler.ContactRequestError()
break
}
}
// Packet is called for each raw packet received on this channel.
func (crc *ContactRequestChannel) Packet(data []byte) {
if !crc.channel.Pending {
response := new(Protocol_Data_ContactRequest.Response)
err := proto.Unmarshal(data, response)
if err == nil {
crc.handleStatus(response.GetStatus().String())
return
}
}
crc.channel.SendMessage([]byte{})
}

226
channels/contactrequestchannel_test.go
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@ -1,226 +0,0 @@
package channels
import (
"github.com/golang/protobuf/proto"
"github.com/s-rah/go-ricochet/utils"
"github.com/s-rah/go-ricochet/wire/contact"
"github.com/s-rah/go-ricochet/wire/control"
"testing"
)
type TestContactRequestHandler struct {
Received bool
}
func (tcrh *TestContactRequestHandler) GetContactDetails() (string, string) {
return "", ""
}
func (tcrh *TestContactRequestHandler) ContactRequest(name string, message string) string {
if name == "test_nickname" && message == "test_message" {
tcrh.Received = true
}
return "Pending"
}
func (tcrh *TestContactRequestHandler) ContactRequestRejected() {
}
func (tcrh *TestContactRequestHandler) ContactRequestAccepted() {
}
func (tcrh *TestContactRequestHandler) ContactRequestError() {
}
func TestContactRequestOptions(t *testing.T) {
contactRequestChannel := new(ContactRequestChannel)
if contactRequestChannel.Type() != "im.ricochet.contact.request" {
t.Errorf("ContactRequestChannel has wrong type %s", contactRequestChannel.Type())
}
if !contactRequestChannel.OnlyClientCanOpen() {
t.Errorf("ContactRequestChannel Should be Client Open Only")
}
if !contactRequestChannel.Singleton() {
t.Errorf("ContactRequestChannel Should be a Singelton")
}
if contactRequestChannel.Bidirectional() {
t.Errorf("ContactRequestChannel Should not be bidirectional")
}
if contactRequestChannel.RequiresAuthentication() != "im.ricochet.auth.hidden-service" {
t.Errorf("ContactRequestChannel should requires im.ricochet.auth.hidden-service Authentication. Instead defines: %s", contactRequestChannel.RequiresAuthentication())
}
}
func TestContactRequestOpenOutbound(t *testing.T) {
contactRequestChannel := new(ContactRequestChannel)
handler := new(TestContactRequestHandler)
contactRequestChannel.Handler = handler
channel := Channel{ID: 1}
response, err := contactRequestChannel.OpenOutbound(&channel)
if err == nil {
res := new(Protocol_Data_Control.Packet)
proto.Unmarshal(response[:], res)
if res.GetOpenChannel() != nil {
// XXX
} else {
t.Errorf("ContactReuqest OpenOutbound was not an OpenChannelRequest %v", err)
}
} else {
t.Errorf("Error while parsing openputput output: %v", err)
}
}
func TestContactRequestOpenOutboundResult(t *testing.T) {
contactRequestChannel := new(ContactRequestChannel)
handler := new(TestContactRequestHandler)
contactRequestChannel.Handler = handler
channel := Channel{ID: 1}
contactRequestChannel.OpenOutbound(&channel)
messageBuilder := new(utils.MessageBuilder)
ack := messageBuilder.ReplyToContactRequestOnResponse(1, "Accepted")
// We have just constructed this so there is little
// point in doing error checking here in the test
res := new(Protocol_Data_Control.Packet)
proto.Unmarshal(ack[:], res)
cr := res.GetChannelResult()
contactRequestChannel.OpenOutboundResult(nil, cr)
}
func TestContactRequestOpenInbound(t *testing.T) {
opm := BuildOpenChannel("test_nickname", "test_message")
contactRequestChannel := new(ContactRequestChannel)
handler := new(TestContactRequestHandler)
contactRequestChannel.Handler = handler
channel := Channel{ID: 1}
response, err := contactRequestChannel.OpenInbound(&channel, opm)
if err == nil {
res := new(Protocol_Data_Control.Packet)
proto.Unmarshal(response[:], res)
responseI, err := proto.GetExtension(res.GetChannelResult(), Protocol_Data_ContactRequest.E_Response)
if err == nil {
response, check := responseI.(*Protocol_Data_ContactRequest.Response)
if check {
if response.GetStatus().String() != "Pending" {
t.Errorf("Contact Request Response should have been Pending, but instead was: %v", response.GetStatus().String())
}
} else {
t.Errorf("Error while parsing openinbound output: %v", err)
}
} else {
t.Errorf("Error while parsing openinbound output: %v", err)
}
} else {
t.Errorf("Error while parsing openinbound output: %v", err)
}
if !handler.Received {
t.Errorf("Contact Request was not received by Handler")
}
}
func TestContactRequestPacket(t *testing.T) {
contactRequestChannel := new(ContactRequestChannel)
handler := new(TestContactRequestHandler)
contactRequestChannel.Handler = handler
channel := Channel{ID: 1}
contactRequestChannel.OpenOutbound(&channel)
messageBuilder := new(utils.MessageBuilder)
ack := messageBuilder.ReplyToContactRequestOnResponse(1, "Pending")
// We have just constructed this so there is little
// point in doing error checking here in the test
res := new(Protocol_Data_Control.Packet)
proto.Unmarshal(ack[:], res)
cr := res.GetChannelResult()
contactRequestChannel.OpenOutboundResult(nil, cr)
ackp := messageBuilder.ReplyToContactRequest(1, "Accepted")
contactRequestChannel.Packet(ackp)
}
func TestContactRequestRejected(t *testing.T) {
contactRequestChannel := new(ContactRequestChannel)
handler := new(TestContactRequestHandler)
contactRequestChannel.Handler = handler
channel := Channel{ID: 1}
contactRequestChannel.OpenOutbound(&channel)
messageBuilder := new(utils.MessageBuilder)
ack := messageBuilder.ReplyToContactRequestOnResponse(1, "Pending")
// We have just constructed this so there is little
// point in doing error checking here in the test
res := new(Protocol_Data_Control.Packet)
proto.Unmarshal(ack[:], res)
cr := res.GetChannelResult()
contactRequestChannel.OpenOutboundResult(nil, cr)
ackp := messageBuilder.ReplyToContactRequest(1, "Rejected")
contactRequestChannel.Packet(ackp)
}
func TestContactRequestError(t *testing.T) {
contactRequestChannel := new(ContactRequestChannel)
handler := new(TestContactRequestHandler)
contactRequestChannel.Handler = handler
channel := Channel{ID: 1}
contactRequestChannel.OpenOutbound(&channel)
messageBuilder := new(utils.MessageBuilder)
ack := messageBuilder.ReplyToContactRequestOnResponse(1, "Pending")
// We have just constructed this so there is little
// point in doing error checking here in the test
res := new(Protocol_Data_Control.Packet)
proto.Unmarshal(ack[:], res)
cr := res.GetChannelResult()
contactRequestChannel.OpenOutboundResult(nil, cr)
ackp := messageBuilder.ReplyToContactRequest(1, "Error")
contactRequestChannel.Packet(ackp)
}
func BuildOpenChannel(nickname string, message string) *Protocol_Data_Control.OpenChannel {
// Construct the Open Authentication Channel Message
messageBuilder := new(utils.MessageBuilder)
ocm := messageBuilder.OpenContactRequestChannel(1, nickname, message)
// We have just constructed this so there is little
// point in doing error checking here in the test
res := new(Protocol_Data_Control.Packet)
proto.Unmarshal(ocm[:], res)
return res.GetOpenChannel()
}
func TestInvalidNickname(t *testing.T) {
opm := BuildOpenChannel("this nickname is far too long at well over the limit of 30 characters", "test_message")
contactRequestChannel := new(ContactRequestChannel)
handler := new(TestContactRequestHandler)
contactRequestChannel.Handler = handler
channel := Channel{ID: 1}
_, err := contactRequestChannel.OpenInbound(&channel, opm)
if err == nil {
t.Errorf("Open Inbound should have failed because of invalid nickname")
}
}
func TestInvalidMessage(t *testing.T) {
var message string
for i := 0; i < 2001; i++ {
message += "a"
}
opm := BuildOpenChannel("test_nickname", message)
contactRequestChannel := new(ContactRequestChannel)
handler := new(TestContactRequestHandler)
contactRequestChannel.Handler = handler
channel := Channel{ID: 1}
_, err := contactRequestChannel.OpenInbound(&channel, opm)
if err == nil {
t.Errorf("Open Inbound should have failed because of invalid message")
}
}

51
channels/handler.go
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@ -1,51 +0,0 @@
package channels
import (
"github.com/s-rah/go-ricochet/wire/control"
)
// Handler reacts to low-level events on a protocol channel. There
// should be a unique instance of a ChannelHandler type per channel.
//
// Applications generally don't need to implement ChannelHandler directly;
// instead, use the built-in implementations for common channel types, and
// their individual callback interfaces. ChannelHandler is useful when
// implementing new channel types, or modifying low level default behavior.
type Handler interface {
// Type returns the type string for this channel, e.g. "im.ricochet.chat".
Type() string
// Closed is called when the channel is closed for any reason.
Closed(err error)
// OnlyClientCanOpen indicates if only a client can open a given channel
OnlyClientCanOpen() bool
// Singleton indicates if a channel can only have one instance per direction
Singleton() bool
// Bidirectional indicates if messages can be send by either side
Bidirectional() bool
// RequiresAuthentication describes what authentication is needed for the channel
RequiresAuthentication() string
// OpenInbound is the first method called for an inbound channel request.
// If an error is returned, the channel is rejected. If a RawMessage is
// returned, it will be sent as the ChannelResult message.
OpenInbound(channel *Channel, raw *Protocol_Data_Control.OpenChannel) ([]byte, error)
// OpenOutbound is the first method called for an outbound channel request.
// If an error is returned, the channel is not opened. If a RawMessage is
// returned, it will be sent as the OpenChannel message.
OpenOutbound(channel *Channel) ([]byte, error)
// OpenOutboundResult is called when a response is received for an
// outbound OpenChannel request. If `err` is non-nil, the channel was
// rejected and Closed will be called immediately afterwards. `raw`
// contains the raw protocol message including any extension data.
OpenOutboundResult(err error, raw *Protocol_Data_Control.ChannelResult)
// Packet is called for each raw packet received on this channel.
Packet(data []byte)
}

265
channels/hiddenserviceauthchannel.go
View File

@ -1,265 +0,0 @@
package channels
import (
"crypto"
"crypto/hmac"
"crypto/rand"
"crypto/rsa"
"crypto/sha256"
"encoding/asn1"
"github.com/golang/protobuf/proto"
"github.com/s-rah/go-ricochet/utils"
"github.com/s-rah/go-ricochet/wire/auth"
"github.com/s-rah/go-ricochet/wire/control"
"io"
)
const (
InvalidClientCookieError = utils.Error("InvalidClientCookieError")
)
// HiddenServiceAuthChannel wraps implementation of im.ricochet.auth.hidden-service"
type HiddenServiceAuthChannel struct {
// Methods of Handler are called for events on this channel
Handler AuthChannelHandler
// PrivateKey must be set for client-side authentication channels
PrivateKey *rsa.PrivateKey
// Server Hostname must be set for client-side authentication channels
ServerHostname string
// Internal state
clientCookie, serverCookie [16]byte
channel *Channel
}
// AuthChannelHandler ...
type AuthChannelHandler interface {
// Client
ClientAuthResult(accepted bool, isKnownContact bool)
// Server
ServerAuthValid(hostname string, publicKey rsa.PublicKey) (allowed, known bool)
ServerAuthInvalid(err error)
}
// Type returns the type string for this channel, e.g. "im.ricochet.chat".
func (ah *HiddenServiceAuthChannel) Type() string {
return "im.ricochet.auth.hidden-service"
}
// Singleton Returns whether or not the given channel type is a singleton
func (ah *HiddenServiceAuthChannel) Singleton() bool {
return true
}
// OnlyClientCanOpen ...
func (ah *HiddenServiceAuthChannel) OnlyClientCanOpen() bool {
return true
}
// Bidirectional Returns whether or not the given channel allows anyone to send messages
func (ah *HiddenServiceAuthChannel) Bidirectional() bool {
return false
}
// RequiresAuthentication Returns whether or not the given channel type requires authentication
func (ah *HiddenServiceAuthChannel) RequiresAuthentication() string {
return "none"
}
// Closed is called when the channel is closed for any reason.
func (ah *HiddenServiceAuthChannel) Closed(err error) {
}
// OpenInbound is the first method called for an inbound channel request.
// If an error is returned, the channel is rejected. If a RawMessage is
// returned, it will be sent as the ChannelResult message.
// Remote -> [Open Authentication Channel] -> Local
func (ah *HiddenServiceAuthChannel) OpenInbound(channel *Channel, oc *Protocol_Data_Control.OpenChannel) ([]byte, error) {
if ah.PrivateKey == nil {
return nil, utils.PrivateKeyNotSetError
}
ah.channel = channel
clientCookie, _ := proto.GetExtension(oc, Protocol_Data_AuthHiddenService.E_ClientCookie)
if len(clientCookie.([]byte)[:]) != 16 {
// reutrn without opening channel.
return nil, InvalidClientCookieError
}
ah.AddClientCookie(clientCookie.([]byte)[:])
messageBuilder := new(utils.MessageBuilder)
channel.Pending = false
return messageBuilder.ConfirmAuthChannel(ah.channel.ID, ah.GenServerCookie()), nil
}
// OpenOutbound is the first method called for an outbound channel request.
// If an error is returned, the channel is not opened. If a RawMessage is
// returned, it will be sent as the OpenChannel message.
// Local -> [Open Authentication Channel] -> Remote
func (ah *HiddenServiceAuthChannel) OpenOutbound(channel *Channel) ([]byte, error) {
if ah.PrivateKey == nil {
return nil, utils.PrivateKeyNotSetError
}
ah.channel = channel
messageBuilder := new(utils.MessageBuilder)
return messageBuilder.OpenAuthenticationChannel(ah.channel.ID, ah.GenClientCookie()), nil
}
// OpenOutboundResult is called when a response is received for an
// outbound OpenChannel request. If `err` is non-nil, the channel was
// rejected and Closed will be called immediately afterwards. `raw`
// contains the raw protocol message including any extension data.
// Input: Remote -> [ChannelResult] -> {Client}
// Output: {Client} -> [Proof] -> Remote
func (ah *HiddenServiceAuthChannel) OpenOutboundResult(err error, crm *Protocol_Data_Control.ChannelResult) {
if err == nil {
if crm.GetOpened() {
serverCookie, _ := proto.GetExtension(crm, Protocol_Data_AuthHiddenService.E_ServerCookie)
if len(serverCookie.([]byte)[:]) != 16 {
ah.channel.SendMessage([]byte{})
return
}
ah.AddServerCookie(serverCookie.([]byte)[:])
publicKeyBytes, _ := asn1.Marshal(rsa.PublicKey{
N: ah.PrivateKey.PublicKey.N,
E: ah.PrivateKey.PublicKey.E,
})
clientHostname := utils.GetTorHostname(publicKeyBytes)
challenge := ah.GenChallenge(clientHostname, ah.ServerHostname)
signature, err := rsa.SignPKCS1v15(nil, ah.PrivateKey, crypto.SHA256, challenge)
if err != nil {
ah.channel.SendMessage([]byte{})
return
}
messageBuilder := new(utils.MessageBuilder)
proof := messageBuilder.Proof(publicKeyBytes, signature)
ah.channel.SendMessage(proof)
}
}
}
// Packet is called for each raw packet received on this channel.
// Input: Remote -> [Proof] -> Client
// OR
// Input: Remote -> [Result] -> Client
func (ah *HiddenServiceAuthChannel) Packet(data []byte) {
res := new(Protocol_Data_AuthHiddenService.Packet)
err := proto.Unmarshal(data[:], res)
if err != nil {
ah.channel.CloseChannel()
return
}
if res.GetProof() != nil && ah.channel.Direction == Inbound {
provisionalClientHostname := utils.GetTorHostname(res.GetProof().GetPublicKey())
publicKeyBytes, err := asn1.Marshal(rsa.PublicKey{
N: ah.PrivateKey.PublicKey.N,
E: ah.PrivateKey.PublicKey.E,
})
if err != nil {
ah.Handler.ServerAuthInvalid(err)
ah.channel.SendMessage([]byte{})
return
}
serverHostname := utils.GetTorHostname(publicKeyBytes)
publicKey := rsa.PublicKey{}
_, err = asn1.Unmarshal(res.GetProof().GetPublicKey(), &publicKey)
if err != nil {
ah.Handler.ServerAuthInvalid(err)
ah.channel.SendMessage([]byte{})
return
}
challenge := ah.GenChallenge(provisionalClientHostname, serverHostname)
err = rsa.VerifyPKCS1v15(&publicKey, crypto.SHA256, challenge[:], res.GetProof().GetSignature())
if err == nil {
// Signature is Good
accepted, isKnownContact := ah.Handler.ServerAuthValid(provisionalClientHostname, publicKey)
// Send Result
messageBuilder := new(utils.MessageBuilder)
result := messageBuilder.AuthResult(accepted, isKnownContact)
ah.channel.DelegateAuthorization()
ah.channel.SendMessage(result)
} else {
// Auth Failed
messageBuilder := new(utils.MessageBuilder)
result := messageBuilder.AuthResult(false, false)
ah.channel.SendMessage(result)
ah.Handler.ServerAuthInvalid(err)
}
} else if res.GetResult() != nil && ah.channel.Direction == Outbound {
ah.Handler.ClientAuthResult(res.GetResult().GetAccepted(), res.GetResult().GetIsKnownContact())
if res.GetResult().GetAccepted() {
ah.channel.DelegateAuthorization()
}
}
// Any other combination of packets is completely invalid
// Fail the Authorization right here.
ah.channel.CloseChannel()
}
// AddClientCookie adds a client cookie to the state.
func (ah *HiddenServiceAuthChannel) AddClientCookie(cookie []byte) {
copy(ah.clientCookie[:], cookie[:16])
}
// AddServerCookie adds a server cookie to the state.
func (ah *HiddenServiceAuthChannel) AddServerCookie(cookie []byte) {
copy(ah.serverCookie[:], cookie[:16])
}
// GenRandom generates a random 16byte cookie string.
func (ah *HiddenServiceAuthChannel) GenRandom() [16]byte {
var cookie [16]byte
io.ReadFull(rand.Reader, cookie[:])
return cookie
}
// GenClientCookie generates and adds a client cookie to the state.
func (ah *HiddenServiceAuthChannel) GenClientCookie() [16]byte {
ah.clientCookie = ah.GenRandom()
return ah.clientCookie
}
// GenServerCookie generates and adds a server cookie to the state.
func (ah *HiddenServiceAuthChannel) GenServerCookie() [16]byte {
ah.serverCookie = ah.GenRandom()
return ah.serverCookie
}
// GenChallenge constructs the challenge parameter for the AuthHiddenService session.
// The challenge is the a Sha256HMAC(clientHostname+serverHostname, key=clientCookie+serverCookie)
func (ah *HiddenServiceAuthChannel) GenChallenge(clientHostname string, serverHostname string) []byte {
key := make([]byte, 32)
copy(key[0:16], ah.clientCookie[:])
copy(key[16:], ah.serverCookie[:])
value := []byte(clientHostname + serverHostname)
mac := hmac.New(sha256.New, key)
mac.Write(value)
hmac := mac.Sum(nil)
return hmac
}

166
channels/hiddenserviceauthchannel_test.go
View File

@ -1,166 +0,0 @@
package channels
import (
"bytes"
"crypto/rsa"
"github.com/golang/protobuf/proto"
"github.com/s-rah/go-ricochet/utils"
"github.com/s-rah/go-ricochet/wire/control"
"testing"
)
func TestGenChallenge(t *testing.T) {
authHandler := new(HiddenServiceAuthChannel)
authHandler.AddClientCookie([]byte("abcdefghijklmnop"))
authHandler.AddServerCookie([]byte("qrstuvwxyz012345"))
challenge := authHandler.GenChallenge("test.onion", "notareal.onion")
expectedChallenge := []byte{0xf5, 0xdb, 0xfd, 0xf0, 0x3d, 0x94, 0x14, 0xf1, 0x4b, 0x37, 0x93, 0xe2, 0xa5, 0x11, 0x4a, 0x98, 0x31, 0x90, 0xea, 0xb8, 0x95, 0x7a, 0x2e, 0xaa, 0xd0, 0xd2, 0x0c, 0x74, 0x95, 0xba, 0xab, 0x73}
t.Log(challenge, expectedChallenge)
if bytes.Compare(challenge[:], expectedChallenge[:]) != 0 {
t.Errorf("HiddenServiceAuthChannel Challenge Is Invalid, Got %x, Expected %x", challenge, expectedChallenge)
}
}
func TestGenClientCookie(t *testing.T) {
authHandler := new(HiddenServiceAuthChannel)
clientCookie := authHandler.GenClientCookie()
if clientCookie != authHandler.clientCookie {
t.Errorf("HiddenServiceAuthChannel Client Cookies are Different %x %x", clientCookie, authHandler.clientCookie)
}
}
func TestGenServerCookie(t *testing.T) {
authHandler := new(HiddenServiceAuthChannel)
serverCookie := authHandler.GenServerCookie()
if serverCookie != authHandler.serverCookie {
t.Errorf("HiddenServiceAuthChannel Server Cookies are Different %x %x", serverCookie, authHandler.serverCookie)
}
}
func TestHiddenServiceAuthChannelOptions(t *testing.T) {
hiddenServiceAuthChannel := new(HiddenServiceAuthChannel)
if hiddenServiceAuthChannel.Type() != "im.ricochet.auth.hidden-service" {
t.Errorf("AuthHiddenService has wrong type %s", hiddenServiceAuthChannel.Type())
}
if !hiddenServiceAuthChannel.OnlyClientCanOpen() {
t.Errorf("AuthHiddenService Should be Client Open Only")
}
if !hiddenServiceAuthChannel.Singleton() {
t.Errorf("AuthHiddenService Should be a Singelton")
}
if hiddenServiceAuthChannel.Bidirectional() {
t.Errorf("AuthHiddenService Should not be bidirectional")
}
if hiddenServiceAuthChannel.RequiresAuthentication() != "none" {
t.Errorf("AuthHiddenService should require no authorization. Instead requires: %s", hiddenServiceAuthChannel.RequiresAuthentication())
}
}
func GetOpenAuthenticationChannelMessage() *Protocol_Data_Control.OpenChannel {
// Construct the Open Authentication Channel Message
messageBuilder := new(utils.MessageBuilder)
ocm := messageBuilder.OpenAuthenticationChannel(1, [16]byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0})
// We have just constructed this so there is little
// point in doing error checking here in the test
res := new(Protocol_Data_Control.Packet)
proto.Unmarshal(ocm[:], res)
return res.GetOpenChannel()
}
func TestAuthenticationOpenInbound(t *testing.T) {
privateKey, _ := utils.LoadPrivateKeyFromFile("../testing/private_key")
opm := GetOpenAuthenticationChannelMessage()
authHandler := new(HiddenServiceAuthChannel)
authHandler.PrivateKey = privateKey
channel := Channel{ID: 1}
response, err := authHandler.OpenInbound(&channel, opm)
if err == nil {
res := new(Protocol_Data_Control.Packet)
proto.Unmarshal(response[:], res)
if res.GetChannelResult() == nil || !res.GetChannelResult().GetOpened() {
t.Errorf("Response not a Open Channel Result %v", res)
}
} else {
t.Errorf("HiddenServiceAuthChannel OpenOutbound Failed: %v", err)
}
}
func TestAuthenticationOpenOutbound(t *testing.T) {
privateKey, _ := utils.LoadPrivateKeyFromFile("../testing/private_key")
authHandler := new(HiddenServiceAuthChannel)
authHandler.PrivateKey = privateKey
channel := Channel{ID: 1}
response, err := authHandler.OpenOutbound(&channel)
if err == nil {
res := new(Protocol_Data_Control.Packet)
proto.Unmarshal(response[:], res)
if res.GetOpenChannel() == nil {
t.Errorf("Open Channel Packet not included %v", res)
}
} else {
t.Errorf("HiddenServiceAuthChannel OpenInbound Failed: %v", err)
}
}
type SimpleTestAuthHandler struct {
}
// Client
func (stah *SimpleTestAuthHandler) ClientAuthResult(accepted bool, isKnownContact bool) {
}
// Server
func (stah *SimpleTestAuthHandler) ServerAuthValid(hostname string, publicKey rsa.PublicKey) (allowed, known bool) {
return true, true
}
func (stah *SimpleTestAuthHandler) ServerAuthInvalid(err error) {
}
func TestAuthenticationOpenOutboundResult(t *testing.T) {
privateKey, _ := utils.LoadPrivateKeyFromFile("../testing/private_key")
authHandlerA := new(HiddenServiceAuthChannel)
authHandlerB := new(HiddenServiceAuthChannel)
simpleTestAuthHandler := new(SimpleTestAuthHandler)
authHandlerA.ServerHostname = "kwke2hntvyfqm7dr"
authHandlerA.PrivateKey = privateKey
authHandlerA.Handler = simpleTestAuthHandler
channelA := Channel{ID: 1, Direction: Outbound}
channelA.SendMessage = func(message []byte) {
authHandlerB.Packet(message)
}
channelA.DelegateAuthorization = func() {}
channelA.CloseChannel = func() {}
response, _ := authHandlerA.OpenOutbound(&channelA)
res := new(Protocol_Data_Control.Packet)
proto.Unmarshal(response[:], res)
authHandlerB.ServerHostname = "kwke2hntvyfqm7dr"
authHandlerB.PrivateKey = privateKey
authHandlerB.Handler = simpleTestAuthHandler
channelB := Channel{ID: 1, Direction: Inbound}
channelB.SendMessage = func(message []byte) {
authHandlerA.Packet(message)
}
channelB.DelegateAuthorization = func() {}
channelB.CloseChannel = func() {}
response, _ = authHandlerB.OpenInbound(&channelB, res.GetOpenChannel())
res = new(Protocol_Data_Control.Packet)
proto.Unmarshal(response[:], res)
authHandlerA.OpenOutboundResult(nil, res.GetChannelResult())
}

0
wire/chat/chat.go → chat/chat.go
View File

93
connection/autoconnectionhandler.go
View File

@ -1,93 +0,0 @@
package connection
import (
"crypto/rsa"
"github.com/s-rah/go-ricochet/channels"
"github.com/s-rah/go-ricochet/utils"
)
// AutoConnectionHandler implements the ConnectionHandler interface on behalf of
// the provided application type by automatically providing support for any
// built-in channel type whose high level interface is implemented by the
// application. For example, if the application's type implements the
// ChatChannelHandler interface, `im.ricochet.chat` will be available to the peer.
//
// The application handler can be any other type. To override or augment any of
// AutoConnectionHandler's behavior (such as adding new channel types, or reacting
// to connection close events), this type can be embedded in the type that it serves.
type AutoConnectionHandler struct {
handlerMap map[string]func() channels.Handler
connection *Connection
authResultChannel chan channels.AuthChannelResult
sach func(hostname string, publicKey rsa.PublicKey) (allowed, known bool)
}
// Init ...
// TODO: Split this into client and server init
func (ach *AutoConnectionHandler) Init(privateKey *rsa.PrivateKey, serverHostname string) {
ach.handlerMap = make(map[string]func() channels.Handler)
ach.RegisterChannelHandler("im.ricochet.auth.hidden-service", func() channels.Handler {
hsau := new(channels.HiddenServiceAuthChannel)
hsau.PrivateKey = privateKey
hsau.Handler = ach
hsau.ServerHostname = serverHostname
return hsau
})
ach.authResultChannel = make(chan channels.AuthChannelResult)
}
// SetServerAuthHandler ...
func (ach *AutoConnectionHandler) SetServerAuthHandler(sach func(hostname string, publicKey rsa.PublicKey) (allowed, known bool)) {
ach.sach = sach
}
// OnReady ...
func (ach *AutoConnectionHandler) OnReady(oc *Connection) {
ach.connection = oc
}
// OnClosed is called when the OpenConnection has closed for any reason.
func (ach *AutoConnectionHandler) OnClosed(err error) {
}
// WaitForAuthenticationEvent ...
func (ach *AutoConnectionHandler) WaitForAuthenticationEvent() channels.AuthChannelResult {
return <-ach.authResultChannel
}
// ClientAuthResult ...
func (ach *AutoConnectionHandler) ClientAuthResult(accepted bool, isKnownContact bool) {
ach.authResultChannel <- channels.AuthChannelResult{Accepted: accepted, IsKnownContact: isKnownContact}
}
// ServerAuthValid ...
func (ach *AutoConnectionHandler) ServerAuthValid(hostname string, publicKey rsa.PublicKey) (allowed, known bool) {
// Do something
accepted, isKnownContact := ach.sach(hostname, publicKey)
ach.authResultChannel <- channels.AuthChannelResult{Hostname: hostname, Accepted: accepted, IsKnownContact: isKnownContact}
return accepted, isKnownContact
}
// ServerAuthInvalid ...
func (ach *AutoConnectionHandler) ServerAuthInvalid(err error) {
ach.authResultChannel <- channels.AuthChannelResult{Accepted: false, IsKnownContact: false}
}
// RegisterChannelHandler ...
func (ach *AutoConnectionHandler) RegisterChannelHandler(ctype string, handler func() channels.Handler) {
_, exists := ach.handlerMap[ctype]
if !exists {
ach.handlerMap[ctype] = handler
}
}
// OnOpenChannelRequest ...
func (ach *AutoConnectionHandler) OnOpenChannelRequest(ctype string) (channels.Handler, error) {
handler, ok := ach.handlerMap[ctype]
if ok {
h := handler()
return h, nil
}
return nil, utils.UnknownChannelTypeError
}

36
connection/autoconnectionhandler_test.go
View File

@ -1,36 +0,0 @@
package connection
import (
"github.com/golang/protobuf/proto"
"github.com/s-rah/go-ricochet/utils"
"github.com/s-rah/go-ricochet/wire/control"
"testing"
)
// Test sending valid packets
func TestInit(t *testing.T) {
ach := new(AutoConnectionHandler)
privateKey, err := utils.LoadPrivateKeyFromFile("../testing/private_key")
ach.Init(privateKey, "")
// Construct the Open Authentication Channel Message
messageBuilder := new(utils.MessageBuilder)
ocm := messageBuilder.OpenAuthenticationChannel(1, [16]byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0})
// We have just constructed this so there is little
// point in doing error checking here in the test
res := new(Protocol_Data_Control.Packet)
proto.Unmarshal(ocm[:], res)
opm := res.GetOpenChannel()
//ocmessage, _ := proto.Marshal(opm)
handler, err := ach.OnOpenChannelRequest(opm.GetChannelType())
if err == nil {
if handler.Type() != "im.ricochet.auth.hidden-service" {
t.Errorf("Failed to authentication handler: %v", handler.Type())
}
} else {
t.Errorf("Failed to build handler: %v", err)
}
}

114
connection/channelmanager.go
View File

@ -1,114 +0,0 @@
package connection
import (
"github.com/s-rah/go-ricochet/channels"
"github.com/s-rah/go-ricochet/utils"
)
// ChannelManager encapsulates the logic for server and client side assignment
// and removal of channels.
type ChannelManager struct {
channels map[int32]*channels.Channel
nextFreeChannel int32
isClient bool
}
// NewClientChannelManager construsts a new channel manager enforcing behaviour
// of a ricochet client
func NewClientChannelManager() *ChannelManager {
channelManager := new(ChannelManager)
channelManager.channels = make(map[int32]*channels.Channel)
channelManager.nextFreeChannel = 1
channelManager.isClient = true
return channelManager
}
// NewServerChannelManager construsts a new channel manager enforcing behaviour
// from a ricochet server
func NewServerChannelManager() *ChannelManager {
channelManager := new(ChannelManager)
channelManager.channels = make(map[int32]*channels.Channel)
channelManager.nextFreeChannel = 2
channelManager.isClient = false
return channelManager
}
// OpenChannelRequest constructs a channel type ready for processing given a request
// from the client.
func (cm *ChannelManager) OpenChannelRequest(chandler channels.Handler) (*channels.Channel, error) {
// Some channels only allow us to open one of them per connection
if chandler.Singleton() && cm.Channel(chandler.Type(), channels.Outbound) != nil {
return nil, utils.AttemptToOpenMoreThanOneSingletonChannelError
}
channel := new(channels.Channel)
channel.ID = cm.nextFreeChannel
cm.nextFreeChannel += 2
channel.Type = chandler.Type()
channel.Handler = &chandler
channel.Pending = true
channel.Direction = channels.Outbound
cm.channels[channel.ID] = channel
return channel, nil
}
// OpenChannelRequestFromPeer constructs a channel type ready for processing given a request
// from the remote peer.
func (cm *ChannelManager) OpenChannelRequestFromPeer(channelID int32, chandler channels.Handler) (*channels.Channel, error) {
if cm.isClient && (channelID%2) != 0 {
// Server is trying to open odd numbered channels
return nil, utils.ServerAttemptedToOpenEvenNumberedChannelError
} else if !cm.isClient && (channelID%2) == 0 {
// Server is trying to open odd numbered channels
return nil, utils.ClientAttemptedToOpenOddNumberedChannelError
}
_, exists := cm.channels[channelID]
if exists {
return nil, utils.ChannelIDIsAlreadyInUseError
}
// Some channels only allow us to open one of them per connection
if chandler.Singleton() && cm.Channel(chandler.Type(), channels.Inbound) != nil {
return nil, utils.AttemptToOpenMoreThanOneSingletonChannelError
}
channel := new(channels.Channel)
channel.ID = channelID
channel.Type = chandler.Type()
channel.Handler = &chandler
channel.Pending = true
channel.Direction = channels.Inbound
cm.channels[channelID] = channel
return channel, nil
}
// Channel finds an open or pending `type` channel in the direction `way` (Inbound
// or Outbound), and returns the associated state. Returns nil if no matching channel
// exists or if multiple matching channels exist.
func (cm *ChannelManager) Channel(ctype string, way channels.Direction) *channels.Channel {
var foundChannel *channels.Channel
for _, channel := range cm.channels {
if (*channel.Handler).Type() == ctype && channel.Direction == way {
if foundChannel == nil {
foundChannel = channel
} else {
// we have found multiple channels.
return nil
}
}
}
return foundChannel
}
// GetChannel finds and returns a given channel if it is found
func (cm *ChannelManager) GetChannel(channelID int32) (*channels.Channel, bool) {
channel, found := cm.channels[channelID]
return channel, found
}
// RemoveChannel removes a given channel id.
func (cm *ChannelManager) RemoveChannel(channelID int32) {
delete(cm.channels, channelID)
}

62
connection/channelmanager_test.go
View File

@ -1,62 +0,0 @@
package connection
import (
"github.com/s-rah/go-ricochet/channels"
"testing"
)
func TestClientManagerDuplicateChannel(t *testing.T) {
ccm := NewClientChannelManager()
chatChannel := new(channels.ChatChannel)
_, err := ccm.OpenChannelRequestFromPeer(2, chatChannel)
if err != nil {
t.Errorf("Opening ChatChannel should have succeeded, instead: %v", err)
}
_, err = ccm.OpenChannelRequestFromPeer(2, chatChannel)
if err == nil {
t.Errorf("Opening ChatChannel should have failed")
}
_, err = ccm.OpenChannelRequestFromPeer(4, chatChannel)
if err == nil {
t.Errorf("Opening ChatChannel should have failed because there should be only 1")
}
}
func TestClientManagerBadServer(t *testing.T) {
ccm := NewClientChannelManager()
// Servers are not allowed to open odd numbered channels
_, err := ccm.OpenChannelRequestFromPeer(3, nil)
if err == nil {
t.Errorf("OpenChannelRequestFromPeer should have failed")
}
}
func TestServerManagerBadClient(t *testing.T) {
scm := NewServerChannelManager()
// Clients are not allowed to open even numbered channels
_, err := scm.OpenChannelRequestFromPeer(2, nil)
if err == nil {
t.Errorf("OpenChannelRequestFromPeer should have failed")
}
}
func TestLocalDuplicate(t *testing.T) {
scm := NewServerChannelManager()
chatChannel := new(channels.ChatChannel)
channel, err := scm.OpenChannelRequest(chatChannel)
if err != nil {
t.Errorf("OpenChannelRequest should not have failed: %v", err)
}
_, err = scm.OpenChannelRequest(chatChannel)
if err == nil {
t.Errorf("OpenChannelRequest should have failed")
}
scm.RemoveChannel(channel.ID)
_, err = scm.OpenChannelRequest(chatChannel)
if err != nil {
t.Errorf("OpenChannelRequest should not have failed: %v", err)
}
}

347
connection/connection.go
View File

@ -1,347 +0,0 @@
package connection
import (
"errors"
"fmt"
"github.com/golang/protobuf/proto"
"github.com/s-rah/go-ricochet/channels"
"github.com/s-rah/go-ricochet/utils"
"github.com/s-rah/go-ricochet/wire/control"
"io"
"log"
)
// Connection encapsulates the state required to maintain a connection to
// a ricochet service.
type Connection struct {
utils.RicochetNetwork
channelManager *ChannelManager
// Ricochet Network Loop
packetChannel chan utils.RicochetData
errorChannel chan error
breakChannel chan bool
breakResultChannel chan bool
unlockChannel chan bool
unlockResponseChannel chan bool
messageBuilder utils.MessageBuilder
trace bool
Conn io.ReadWriteCloser
IsInbound bool
Authentication map[string]bool
RemoteHostname string
}
func (rc *Connection) init() {
rc.packetChannel = make(chan utils.RicochetData)
rc.errorChannel = make(chan error)
rc.breakChannel = make(chan bool)
rc.breakResultChannel = make(chan bool)
rc.unlockChannel = make(chan bool)
rc.unlockResponseChannel = make(chan bool)
rc.Authentication = make(map[string]bool)
go rc.start()
}
// NewInboundConnection creates a new Connection struct
// modelling an Inbound Connection
func NewInboundConnection(conn io.ReadWriteCloser) *Connection {
rc := new(Connection)
rc.Conn = conn
rc.IsInbound = true
rc.init()
rc.channelManager = NewServerChannelManager()
return rc
}
// NewOutboundConnection creates a new Connection struct
// modelling an Inbound Connection
func NewOutboundConnection(conn io.ReadWriteCloser, remoteHostname string) *Connection {
rc := new(Connection)
rc.Conn = conn
rc.IsInbound = false
rc.init()
rc.RemoteHostname = remoteHostname
rc.channelManager = NewClientChannelManager()
return rc
}
func (rc *Connection) TraceLog(enabled bool) {
rc.trace = enabled
}
// start
func (rc *Connection) start() {
for {
packet, err := rc.RecvRicochetPacket(rc.Conn)
if err != nil {
rc.errorChannel <- err
return
}
rc.packetChannel <- packet
}
}
// Do allows any function utilizing Connection to be run safetly.
// All operations which require access to Connection managed resources should
// use Do()
func (rc *Connection) Do(do func() error) error {
// Force process to soft-break so we can lock
rc.traceLog("request unlocking of process loop for do()")
rc.unlockChannel <- true
rc.traceLog("process loop is unlocked for do()")
ret := do()
rc.traceLog("giving up lock process loop after do() ")
rc.unlockResponseChannel <- true
return ret
}
// RequestOpenChannel sends an OpenChannel message to the remote client.
// and error is returned only if the requirements for opening this channel
// are not met on the local side (a nill error return does not mean the
// channel was opened successfully)
func (rc *Connection) RequestOpenChannel(ctype string, handler Handler) error {
rc.traceLog(fmt.Sprintf("requesting open channel of type %s", ctype))
return rc.Do(func() error {
chandler, err := handler.OnOpenChannelRequest(ctype)
if err != nil {
rc.traceLog(fmt.Sprintf("failed to request open channel of type %v", err))
return err
}
// Check that we have the authentication already
if chandler.RequiresAuthentication() != "none" {
// Enforce Authentication Check.
_, authed := rc.Authentication[chandler.RequiresAuthentication()]
if !authed {
return utils.UnauthorizedActionError
}
}
channel, err := rc.channelManager.OpenChannelRequest(chandler)
if err != nil {
rc.traceLog(fmt.Sprintf("failed to reqeust open channel of type %v", err))
return err
}
channel.SendMessage = func(message []byte) {
rc.SendRicochetPacket(rc.Conn, channel.ID, message)
}
channel.DelegateAuthorization = func() {
rc.Authentication[chandler.Type()] = true
}
channel.CloseChannel = func() {
rc.SendRicochetPacket(rc.Conn, channel.ID, []byte{})
rc.channelManager.RemoveChannel(channel.ID)
}
response, err := chandler.OpenOutbound(channel)
if err == nil {
rc.traceLog(fmt.Sprintf("requested open channel of type %s", ctype))
rc.SendRicochetPacket(rc.Conn, 0, response)
} else {
rc.traceLog(fmt.Sprintf("failed to reqeust open channel of type %v", err))
rc.channelManager.RemoveChannel(channel.ID)
}
return nil
})
}
// Process receives socket and protocol events for the connection. Methods
// of the application-provided `handler` will be called from this goroutine
// for all events.
//
// Process must be running in order to handle any events on the connection,
// including connection close.
//
// Process blocks until the connection is closed or until Break() is called.
// If the connection is closed, a non-nil error is returned.
func (rc *Connection) Process(handler Handler) error {
rc.traceLog("entering process loop")
handler.OnReady(rc)
breaked := false
for !breaked {
var packet utils.RicochetData
select {
case <-rc.unlockChannel:
<-rc.unlockResponseChannel
continue
case <-rc.breakChannel:
rc.traceLog("process has ended after break")
breaked = true
continue
case packet = <-rc.packetChannel:
break
case err := <-rc.errorChannel:
rc.Conn.Close()
handler.OnClosed(err)
return err
}
if packet.Channel == 0 {
rc.traceLog(fmt.Sprintf("received control packet on channel %d", packet.Channel))
res := new(Protocol_Data_Control.Packet)
err := proto.Unmarshal(packet.Data[:], res)
if err == nil {
rc.controlPacket(handler, res)
}
} else {
// Let's check to see if we have defined this channel.
channel, found := rc.channelManager.GetChannel(packet.Channel)
if found {
if len(packet.Data) == 0 {
rc.traceLog(fmt.Sprintf("removing channel %d", packet.Channel))
rc.channelManager.RemoveChannel(packet.Channel)
(*channel.Handler).Closed(utils.ChannelClosedByPeerError)
} else {
rc.traceLog(fmt.Sprintf("received packet on %v channel %d", (*channel.Handler).Type(), packet.Channel))
// Send The Ricochet Packet to the Handler
(*channel.Handler).Packet(packet.Data[:])
}
} else {
// When a non-zero packet is received for an unknown
// channel, the recipient responds by closing
// that channel.
rc.traceLog(fmt.Sprintf("received packet on unknown channel %d. closing.", packet.Channel))
if len(packet.Data) != 0 {
rc.SendRicochetPacket(rc.Conn, packet.Channel, []byte{})
}
}
}
}
rc.breakResultChannel <- true
return nil
}
func (rc *Connection) controlPacket(handler Handler, res *Protocol_Data_Control.Packet) {
if res.GetOpenChannel() != nil {
opm := res.GetOpenChannel()
chandler, err := handler.OnOpenChannelRequest(opm.GetChannelType())
if err != nil {
response := rc.messageBuilder.RejectOpenChannel(opm.GetChannelIdentifier(), "UnknownTypeError")
rc.SendRicochetPacket(rc.Conn, 0, response)
return
}
// Check that we have the authentication already
if chandler.RequiresAuthentication() != "none" {
rc.traceLog(fmt.Sprintf("channel %v requires authorization of type %v", chandler.Type(), chandler.RequiresAuthentication()))
// Enforce Authentication Check.
_, authed := rc.Authentication[chandler.RequiresAuthentication()]
if !authed {
rc.SendRicochetPacket(rc.Conn, 0, []byte{})
rc.traceLog(fmt.Sprintf("do not have required authorization to open channel type %v", chandler.Type()))
return
}
rc.traceLog("succeeded authorization check")
}
channel, err := rc.channelManager.OpenChannelRequestFromPeer(opm.GetChannelIdentifier(), chandler)
if err == nil {
channel.SendMessage = func(message []byte) {
rc.SendRicochetPacket(rc.Conn, channel.ID, message)
}
channel.DelegateAuthorization = func() {
rc.Authentication[chandler.Type()] = true
}
channel.CloseChannel = func() {
rc.SendRicochetPacket(rc.Conn, channel.ID, []byte{})
rc.channelManager.RemoveChannel(channel.ID)
}
response, err := chandler.OpenInbound(channel, opm)
if err == nil && channel.Pending == false {
rc.traceLog(fmt.Sprintf("opening channel %v on %v", channel.Type, channel.ID))
rc.SendRicochetPacket(rc.Conn, 0, response)
} else {
rc.traceLog(fmt.Sprintf("removing channel %v", channel.ID))
rc.channelManager.RemoveChannel(channel.ID)
rc.SendRicochetPacket(rc.Conn, 0, []byte{})
}
} else {
// Send Error Packet
response := rc.messageBuilder.RejectOpenChannel(opm.GetChannelIdentifier(), "GenericError")
rc.traceLog(fmt.Sprintf("sending reject open channel for %v", opm.GetChannelIdentifier()))
rc.SendRicochetPacket(rc.Conn, 0, response)
}
} else if res.GetChannelResult() != nil {
cr := res.GetChannelResult()
id := cr.GetChannelIdentifier()
channel, found := rc.channelManager.GetChannel(id)
if !found {
rc.traceLog(fmt.Sprintf("channel result recived for unknown channel: %v", channel.Type, id))
return
}
if cr.GetOpened() {
rc.traceLog(fmt.Sprintf("channel of type %v opened on %v", channel.Type, id))
(*channel.Handler).OpenOutboundResult(nil, cr)
} else {
rc.traceLog(fmt.Sprintf("channel of type %v rejected on %v", channel.Type, id))
(*channel.Handler).OpenOutboundResult(errors.New(""), cr)
}
} else if res.GetKeepAlive() != nil {
// XXX Though not currently part of the protocol
// We should likely put these calls behind
// authentication.
rc.traceLog("received keep alive packet")
if res.GetKeepAlive().GetResponseRequested() {
messageBuilder := new(utils.MessageBuilder)
raw := messageBuilder.KeepAlive(true)
rc.traceLog("sending keep alive response")
rc.SendRicochetPacket(rc.Conn, 0, raw)
}
} else if res.GetEnableFeatures() != nil {
rc.traceLog("received features enabled packet")
messageBuilder := new(utils.MessageBuilder)
raw := messageBuilder.FeaturesEnabled([]string{})
rc.traceLog("sending featured enabled empty response")
rc.SendRicochetPacket(rc.Conn, 0, raw)
} else if res.GetFeaturesEnabled() != nil {
// TODO We should never send out an enabled features
// request.
rc.traceLog("sending unsolicited features enabled response")
}
}
func (rc *Connection) traceLog(message string) {
if rc.trace {
log.Printf(message)
}
}
// Break causes Process() to return, but does not close the underlying connection
func (rc *Connection) Break() {
rc.traceLog("breaking out of process loop")
rc.breakChannel <- true
<-rc.breakResultChannel // Wait for Process to End
}
// Channel is a convienciance method for returning a given channel to the caller
// of Process() - TODO - this is kind of ugly.
func (rc *Connection) Channel(ctype string, way channels.Direction) *channels.Channel {
return rc.channelManager.Channel(ctype, way)
}

89
connection/connection_test.go
View File

@ -1,89 +0,0 @@
package connection
import (
"crypto/rsa"
"github.com/s-rah/go-ricochet/utils"
"net"
"testing"
"time"
)
// Server
func ServerAuthValid(hostname string, publicKey rsa.PublicKey) (allowed, known bool) {
return true, true
}
func TestProcessAuthAsServer(t *testing.T) {
ln, _ := net.Listen("tcp", "127.0.0.1:0")
go func() {
cconn, _ := net.Dial("tcp", ln.Addr().String())
orc := NewOutboundConnection(cconn, "kwke2hntvyfqm7dr")
orc.TraceLog(true)
privateKey, _ := utils.LoadPrivateKeyFromFile("../testing/private_key")
known, err := HandleOutboundConnection(orc).ProcessAuthAsClient(privateKey)
if err != nil {
t.Errorf("Error while testing ProcessAuthAsClient (in ProcessAuthAsServer) %v", err)
return
} else if !known {
t.Errorf("Client should have been known to the server, instead known was: %v", known)
return
}
}()
conn, _ := ln.Accept()
privateKey, _ := utils.LoadPrivateKeyFromFile("../testing/private_key")
rc := NewInboundConnection(conn)
err := HandleInboundConnection(rc).ProcessAuthAsServer(privateKey, ServerAuthValid)
if err != nil {
t.Errorf("Error while testing ProcessAuthAsServer: %v", err)
}
}
func TestProcessServerAuthFail(t *testing.T) {
ln, _ := net.Listen("tcp", "127.0.0.1:0")
go func() {
cconn, _ := net.Dial("tcp", ln.Addr().String())
orc := NewOutboundConnection(cconn, "kwke2hntvyfqm7dr")
privateKey, _ := utils.LoadPrivateKeyFromFile("../testing/private_key")
HandleOutboundConnection(orc).ProcessAuthAsClient(privateKey)
}()
conn, _ := ln.Accept()
privateKey, _ := utils.LoadPrivateKeyFromFile("../testing/private_key_auth_fail_test")
rc := NewInboundConnection(conn)
err := HandleInboundConnection(rc).ProcessAuthAsServer(privateKey, ServerAuthValid)
if err == nil {
t.Errorf("Error while testing ProcessAuthAsServer - should have failed %v", err)
}
}
func TestProcessAuthTimeout(t *testing.T) {
ln, _ := net.Listen("tcp", "127.0.0.1:0")
go func() {
net.Dial("tcp", ln.Addr().String())
time.Sleep(16 * time.Second)
}()
conn, _ := ln.Accept()
privateKey, _ := utils.LoadPrivateKeyFromFile("../testing/private_key")
rc := NewInboundConnection(conn)
err := HandleInboundConnection(rc).ProcessAuthAsServer(privateKey, ServerAuthValid)
if err != utils.ActionTimedOutError {
t.Errorf("Error while testing TestProcessAuthTimeout - Should have timed out after 15 seconds")
}
}

28
connection/handler.go
View File

@ -1,28 +0,0 @@
package connection
import (
"github.com/s-rah/go-ricochet/channels"
)
// Handler reacts to low-level events on a protocol connection.
// There should be a unique instance of a ConnectionHandler type per
// OpenConnection.
type Handler interface {
// OnReady is called when the connection begins using this handler.
OnReady(oc *Connection)
// OnClosed is called when the OpenConnection has closed for any reason.
OnClosed(err error)
// OpenChannelRequest is called when the peer asks to open a channel of
// `type`. `raw` contains the protocol OpenChannel message including any
// extension data. If this channel type is recognized and allowed by this
// connection in this state, return a type implementing ChannelHandler for
// events related to this channel. Returning an error or nil rejects the
// channel.
//
// Channel type handlers may implement additional state and sanity checks.
// A non-nil return from this function does not guarantee that the channel
// will be opened.
OnOpenChannelRequest(ctype string) (channels.Handler, error)
}

66
connection/inboundconnectionhandler.go
View File

@ -1,66 +0,0 @@
package connection
import (
"crypto/rsa"
"github.com/s-rah/go-ricochet/channels"
"github.com/s-rah/go-ricochet/policies"
"github.com/s-rah/go-ricochet/utils"
)
// InboundConnectionHandler is a convieniance wrapper for handling inbound
// connections
type InboundConnectionHandler struct {
connection *Connection
}
// HandleInboundConnection returns an InboundConnectionHandler given a connection
func HandleInboundConnection(c *Connection) *InboundConnectionHandler {
ich := new(InboundConnectionHandler)
ich.connection = c
return ich
}
// ProcessAuthAsServer blocks until authentication has succeeded, failed, or the
// connection is closed. A non-nil error is returned in all cases other than successful
// and accepted authentication.
//
// ProcessAuthAsServer cannot be called at the same time as any other call to a Process
// function. Another Process function must be called after this function successfully
// returns to continue handling connection events.
//
// The acceptCallback function is called after receiving a valid authentication proof
// with the client's authenticated hostname and public key. acceptCallback must return
// true to accept authentication and allow the connection to continue, and also returns a
// boolean indicating whether the contact is known and recognized. Unknown contacts will
// assume they are required to send a contact request before any other activity.
func (ich *InboundConnectionHandler) ProcessAuthAsServer(privateKey *rsa.PrivateKey, sach func(hostname string, publicKey rsa.PublicKey) (allowed, known bool)) error {
if privateKey == nil {
return utils.PrivateKeyNotSetError
}
ach := new(AutoConnectionHandler)
ach.Init(privateKey, ich.connection.RemoteHostname)
ach.SetServerAuthHandler(sach)
var authResult channels.AuthChannelResult
go func() {
authResult = ach.WaitForAuthenticationEvent()
ich.connection.Break()
}()
policy := policies.UnknownPurposeTimeout
err := policy.ExecuteAction(func() error {
return ich.connection.Process(ach)
})
if err == nil {
if authResult.Accepted == true {
ich.connection.RemoteHostname = authResult.Hostname
return nil
}
return utils.ClientFailedToAuthenticateError
}
return err
}

64
connection/outboundconnectionhandler.go
View File

@ -1,64 +0,0 @@
package connection
import (
"crypto/rsa"
"github.com/s-rah/go-ricochet/channels"
"github.com/s-rah/go-ricochet/policies"
"github.com/s-rah/go-ricochet/utils"
)
// OutboundConnectionHandler is a convieniance wrapper for handling outbound
// connections
type OutboundConnectionHandler struct {
connection *Connection
}
// HandleOutboundConnection returns an OutboundConnectionHandler given a connection
func HandleOutboundConnection(c *Connection) *OutboundConnectionHandler {
och := new(OutboundConnectionHandler)
och.connection = c
return och
}
// ProcessAuthAsClient blocks until authentication has succeeded or failed with the
// provided privateKey, or the connection is closed. A non-nil error is returned in all
// cases other than successful authentication.
//
// ProcessAuthAsClient cannot be called at the same time as any other call to a Porcess
// function. Another Process function must be called after this function successfully
// returns to continue handling connection events.
//
// For successful authentication, the `known` return value indicates whether the peer
// accepts us as a known contact. Unknown contacts will generally need to send a contact
// request before any other activity.
func (och *OutboundConnectionHandler) ProcessAuthAsClient(privateKey *rsa.PrivateKey) (bool, error) {
if privateKey == nil {
return false, utils.PrivateKeyNotSetError
}
ach := new(AutoConnectionHandler)
ach.Init(privateKey, och.connection.RemoteHostname)
var result channels.AuthChannelResult
go func() {
err := och.connection.RequestOpenChannel("im.ricochet.auth.hidden-service", ach)
if err != nil {
return
}
result = ach.WaitForAuthenticationEvent()
och.connection.Break()
}()
policy := policies.UnknownPurposeTimeout
err := policy.ExecuteAction(func() error {
return och.connection.Process(ach)
})
if err == nil {
if result.Accepted == true {
return result.IsKnownContact, nil
}
}
return false, utils.ServerRejectedClientConnectionError
}

2
wire/contact/request.go → contact/request.go
View File

@ -17,7 +17,7 @@ package Protocol_Data_ContactRequest
import proto "github.com/golang/protobuf/proto"
import fmt "fmt"
import math "math"
import Protocol_Data_Control "github.com/s-rah/go-ricochet/wire/control"
import Protocol_Data_Control "github.com/s-rah/go-ricochet/control"
// Reference imports to suppress errors if they are not otherwise used.
var _ = proto.Marshal

0
wire/control/control_message.go → control/control_message.go
View File

97
examples/echobot/main.go
View File

@ -2,97 +2,40 @@ package main
import (
"github.com/s-rah/go-ricochet"
"github.com/s-rah/go-ricochet/channels"
"github.com/s-rah/go-ricochet/connection"
"github.com/s-rah/go-ricochet/utils"
"log"
"time"
)
// EchoBotService is an example service which simply echoes back what a client
// sends it.
type RicochetEchoBot struct {
connection.AutoConnectionHandler
messages chan string
type EchoBotService struct {
goricochet.StandardRicochetService
}
func (echobot *RicochetEchoBot) GetContactDetails() (string, string) {
return "EchoBot", "I LIVE 😈😈!!!!"
}
func (echobot *RicochetEchoBot) ContactRequest(name string, message string) string {
return "Pending"
}
func (echobot *RicochetEchoBot) ContactRequestRejected() {
}
func (echobot *RicochetEchoBot) ContactRequestAccepted() {
}
func (echobot *RicochetEchoBot) ContactRequestError() {
}
func (echobot *RicochetEchoBot) ChatMessage(messageID uint32, when time.Time, message string) bool {
echobot.messages <- message
// IsKnownContact is configured to always accept Contact Requests
func (ebs *EchoBotService) IsKnownContact(hostname string) bool {
return true
}
func (echobot *RicochetEchoBot) ChatMessageAck(messageID uint32) {
// OnContactRequest - we always accept new contact request.
func (ebs *EchoBotService) OnContactRequest(oc *goricochet.OpenConnection, channelID int32, nick string, message string) {
ts.StandardRicochetService.OnContactRequest(oc, channelID, nick, message)
oc.AckContactRequestOnResponse(channelID, "Accepted")
oc.CloseChannel(channelID)
}
func (echobot *RicochetEchoBot) Connect(privateKeyFile string, hostname string) {
privateKey, _ := utils.LoadPrivateKeyFromFile(privateKeyFile)
echobot.messages = make(chan string)
echobot.Init(privateKey, hostname)
echobot.RegisterChannelHandler("im.ricochet.contact.request", func() channels.Handler {
contact := new(channels.ContactRequestChannel)
contact.Handler = echobot
return contact
})
echobot.RegisterChannelHandler("im.ricochet.chat", func() channels.Handler {
chat := new(channels.ChatChannel)
chat.Handler = echobot
return chat
})
rc, _ := goricochet.Open(hostname)
known, err := connection.HandleOutboundConnection(rc).ProcessAuthAsClient(privateKey)
if err == nil {
go rc.Process(echobot)
if !known {
err := rc.RequestOpenChannel("im.ricochet.contact.request", echobot)
if err != nil {
log.Printf("could not contact %s", err)
}
}
rc.RequestOpenChannel("im.ricochet.chat", echobot)
for {
message := <-echobot.messages
log.Printf("Received Message: %s", message)
rc.Do(func() error {
log.Printf("Finding Chat Channel")
channel := rc.Channel("im.ricochet.chat", channels.Outbound)
if channel != nil {
log.Printf("Found Chat Channel")
chatchannel, ok := (*channel.Handler).(*channels.ChatChannel)
if ok {
chatchannel.SendMessage(message)
}
} else {
log.Printf("Could not find chat channel")
}
return nil
})
}
// OnChatMessage we acknowledge the message, grab the message content and send it back - opening
// a new channel if necessary.
func (ebs *EchoBotService) OnChatMessage(oc *goricochet.OpenConnection, channelID int32, messageID int32, message string) {
log.Printf("Received Message from %s: %s", oc.OtherHostname, message)
oc.AckChatMessage(channelID, messageID)
if oc.GetChannelType(6) == "none" {
oc.OpenChatChannel(6)
}
oc.SendMessage(6, message)
}
func main() {
echoBot := new(RicochetEchoBot)
echoBot.Connect("private_key", "oqf7z4ot6kuejgam")
ricochetService := new(EchoBotService)
ricochetService.Init("./private_key")
ricochetService.Listen(ricochetService, 12345)
}

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135
utils/messagebuilder.go → messagebuilder.go
View File

@ -1,11 +1,12 @@
package utils
package goricochet
import (
"github.com/golang/protobuf/proto"
"github.com/s-rah/go-ricochet/wire/auth"
"github.com/s-rah/go-ricochet/wire/chat"
"github.com/s-rah/go-ricochet/wire/contact"
"github.com/s-rah/go-ricochet/wire/control"
"github.com/s-rah/go-ricochet/auth"
"github.com/s-rah/go-ricochet/chat"
"github.com/s-rah/go-ricochet/contact"
"github.com/s-rah/go-ricochet/control"
"github.com/s-rah/go-ricochet/utils"
)
// MessageBuilder allows a client to construct specific data packets for the
@ -15,7 +16,7 @@ type MessageBuilder struct {
// OpenChannel contructs a message which will request to open a channel for
// chat on the given channelID.
func (mb *MessageBuilder) OpenChannel(channelID int32, channelType string) []byte {
func (mb *MessageBuilder) OpenChannel(channelID int32, channelType string) ([]byte, error) {
oc := &Protocol_Data_Control.OpenChannel{
ChannelIdentifier: proto.Int32(channelID),
ChannelType: proto.String(channelType),
@ -23,13 +24,11 @@ func (mb *MessageBuilder) OpenChannel(channelID int32, channelType string) []byt
pc := &Protocol_Data_Control.Packet{
OpenChannel: oc,
}
ret, err := proto.Marshal(pc)
CheckError(err)
return ret
return proto.Marshal(pc)
}
// AckOpenChannel constructs a message to acknowledge a previous open channel operation.
func (mb *MessageBuilder) AckOpenChannel(channelID int32) []byte {
func (mb *MessageBuilder) AckOpenChannel(channelID int32) ([]byte, error) {
cr := &Protocol_Data_Control.ChannelResult{
ChannelIdentifier: proto.Int32(channelID),
Opened: proto.Bool(true),
@ -37,13 +36,11 @@ func (mb *MessageBuilder) AckOpenChannel(channelID int32) []byte {
pc := &Protocol_Data_Control.Packet{
ChannelResult: cr,
}
ret, err := proto.Marshal(pc)
CheckError(err)
return ret
return proto.Marshal(pc)
}
// RejectOpenChannel constructs a channel result message, stating the channel failed to open and a reason
func (mb *MessageBuilder) RejectOpenChannel(channelID int32, error string) []byte {
func (mb *MessageBuilder) RejectOpenChannel(channelID int32, error string) ([]byte, error) {
errorNum := Protocol_Data_Control.ChannelResult_CommonError_value[error]
commonError := Protocol_Data_Control.ChannelResult_CommonError(errorNum)
@ -56,32 +53,28 @@ func (mb *MessageBuilder) RejectOpenChannel(channelID int32, error string) []byt
pc := &Protocol_Data_Control.Packet{
ChannelResult: cr,
}
ret, err := proto.Marshal(pc)
CheckError(err)
return ret
return proto.Marshal(pc)
}
// ConfirmAuthChannel constructs a message to acknowledge a previous open channel operation.
func (mb *MessageBuilder) ConfirmAuthChannel(channelID int32, serverCookie [16]byte) []byte {
func (mb *MessageBuilder) ConfirmAuthChannel(channelID int32, serverCookie [16]byte) ([]byte, error) {
cr := &Protocol_Data_Control.ChannelResult{
ChannelIdentifier: proto.Int32(channelID),
Opened: proto.Bool(true),
}
err := proto.SetExtension(cr, Protocol_Data_AuthHiddenService.E_ServerCookie, serverCookie[:])
CheckError(err)
utils.CheckError(err)
pc := &Protocol_Data_Control.Packet{
ChannelResult: cr,
}
ret, err := proto.Marshal(pc)
CheckError(err)
return ret
return proto.Marshal(pc)
}
// OpenContactRequestChannel contructs a message which will reuqest to open a channel for
// a contact request on the given channelID, with the given nick and message.
func (mb *MessageBuilder) OpenContactRequestChannel(channelID int32, nick string, message string) []byte {
func (mb *MessageBuilder) OpenContactRequestChannel(channelID int32, nick string, message string) ([]byte, error) {
// Construct a Contact Request Channel
oc := &Protocol_Data_Control.OpenChannel{
ChannelIdentifier: proto.Int32(channelID),
@ -94,18 +87,16 @@ func (mb *MessageBuilder) OpenContactRequestChannel(channelID int32, nick string
}
err := proto.SetExtension(oc, Protocol_Data_ContactRequest.E_ContactRequest, contactRequest)
CheckError(err)
utils.CheckError(err)
pc := &Protocol_Data_Control.Packet{
OpenChannel: oc,
}
ret, err := proto.Marshal(pc)
CheckError(err)
return ret
return proto.Marshal(pc)
}
// ReplyToContactRequestOnResponse constructs a message to acknowledge contact request
func (mb *MessageBuilder) ReplyToContactRequestOnResponse(channelID int32, status string) []byte {
func (mb *MessageBuilder) ReplyToContactRequestOnResponse(channelID int32, status string) ([]byte, error) {
cr := &Protocol_Data_Control.ChannelResult{
ChannelIdentifier: proto.Int32(channelID),
Opened: proto.Bool(true),
@ -118,49 +109,42 @@ func (mb *MessageBuilder) ReplyToContactRequestOnResponse(channelID int32, statu
}
err := proto.SetExtension(cr, Protocol_Data_ContactRequest.E_Response, contactRequest)
CheckError(err)
utils.CheckError(err)
pc := &Protocol_Data_Control.Packet{
ChannelResult: cr,
}
ret, err := proto.Marshal(pc)
CheckError(err)
return ret
return proto.Marshal(pc)
}
// ReplyToContactRequest constructs a message to acknowledge a contact request
func (mb *MessageBuilder) ReplyToContactRequest(channelID int32, status string) []byte {
func (mb *MessageBuilder) ReplyToContactRequest(channelID int32, status string) ([]byte, error) {
statusNum := Protocol_Data_ContactRequest.Response_Status_value[status]
responseStatus := Protocol_Data_ContactRequest.Response_Status(statusNum)
contactRequest := &Protocol_Data_ContactRequest.Response{
Status: &responseStatus,
}
ret, err := proto.Marshal(contactRequest)
CheckError(err)
return ret
return proto.Marshal(contactRequest)
}
// OpenAuthenticationChannel constructs a message which will reuqest to open a channel for
// authentication on the given channelID, with the given cookie
func (mb *MessageBuilder) OpenAuthenticationChannel(channelID int32, clientCookie [16]byte) []byte {
func (mb *MessageBuilder) OpenAuthenticationChannel(channelID int32, clientCookie [16]byte) ([]byte, error) {
oc := &Protocol_Data_Control.OpenChannel{
ChannelIdentifier: proto.Int32(channelID),
ChannelType: proto.String("im.ricochet.auth.hidden-service"),
}
err := proto.SetExtension(oc, Protocol_Data_AuthHiddenService.E_ClientCookie, clientCookie[:])
CheckError(err)
utils.CheckError(err)
pc := &Protocol_Data_Control.Packet{
OpenChannel: oc,
}
ret, err := proto.Marshal(pc)
CheckError(err)
return ret
return proto.Marshal(pc)
}
// Proof constructs a proof message with the given public key and signature.
func (mb *MessageBuilder) Proof(publicKeyBytes []byte, signatureBytes []byte) []byte {
func (mb *MessageBuilder) Proof(publicKeyBytes []byte, signatureBytes []byte) ([]byte, error) {
proof := &Protocol_Data_AuthHiddenService.Proof{
PublicKey: publicKeyBytes,
Signature: signatureBytes,
@ -171,13 +155,11 @@ func (mb *MessageBuilder) Proof(publicKeyBytes []byte, signatureBytes []byte) []
Result: nil,
}
ret, err := proto.Marshal(ahsPacket)
CheckError(err)
return ret
return proto.Marshal(ahsPacket)
}
// AuthResult constructs a response to a Proof
func (mb *MessageBuilder) AuthResult(accepted bool, isKnownContact bool) []byte {
func (mb *MessageBuilder) AuthResult(accepted bool, isKnownContact bool) ([]byte, error) {
// Construct a Result Message
result := &Protocol_Data_AuthHiddenService.Result{
Accepted: proto.Bool(accepted),
@ -189,74 +171,29 @@ func (mb *MessageBuilder) AuthResult(accepted bool, isKnownContact bool) []byte
Result: result,
}
ret, err := proto.Marshal(ahsPacket)
CheckError(err)
return ret
return proto.Marshal(ahsPacket)
}
// ChatMessage constructs a chat message with the given content.
func (mb *MessageBuilder) ChatMessage(message string, messageID uint32) []byte {
func (mb *MessageBuilder) ChatMessage(message string, messageID int32) ([]byte, error) {
cm := &Protocol_Data_Chat.ChatMessage{
MessageId: proto.Uint32(messageID),
MessageId: proto.Uint32(uint32(messageID)),
MessageText: proto.String(message),
}
chatPacket := &Protocol_Data_Chat.Packet{
ChatMessage: cm,
}
ret, err := proto.Marshal(chatPacket)
CheckError(err)
return ret
return proto.Marshal(chatPacket)
}
// AckChatMessage constructs a chat message acknowledgement.
func (mb *MessageBuilder) AckChatMessage(messageID uint32) []byte {
func (mb *MessageBuilder) AckChatMessage(messageID int32) ([]byte, error) {
cr := &Protocol_Data_Chat.ChatAcknowledge{
MessageId: proto.Uint32(messageID),
MessageId: proto.Uint32(uint32(messageID)),
Accepted: proto.Bool(true),
}
pc := &Protocol_Data_Chat.Packet{
ChatAcknowledge: cr,
}
ret, err := proto.Marshal(pc)
CheckError(err)
return ret
}
// KeepAlive ...
func (mb *MessageBuilder) KeepAlive(responseRequested bool) []byte {
ka := &Protocol_Data_Control.KeepAlive{
ResponseRequested: proto.Bool(responseRequested),
}
pc := &Protocol_Data_Control.Packet{
KeepAlive: ka,
}
ret, err := proto.Marshal(pc)
CheckError(err)
return ret
}
// EnableFeatures ...
func (mb *MessageBuilder) EnableFeatures(features []string) []byte {
ef := &Protocol_Data_Control.EnableFeatures{
Feature: features,
}
pc := &Protocol_Data_Control.Packet{
EnableFeatures: ef,
}
ret, err := proto.Marshal(pc)
CheckError(err)
return ret
}
// FeaturesEnabled ...
func (mb *MessageBuilder) FeaturesEnabled(features []string) []byte {
fe := &Protocol_Data_Control.FeaturesEnabled{
Feature: features,
}
pc := &Protocol_Data_Control.Packet{
FeaturesEnabled: fe,
}
ret, err := proto.Marshal(pc)
CheckError(err)
return ret
return proto.Marshal(pc)
}

39
messagebuilder_test.go Normal file
View File

@ -0,0 +1,39 @@
package goricochet
import "testing"
func TestOpenChatChannel(t *testing.T) {
messageBuilder := new(MessageBuilder)
_, err := messageBuilder.OpenChannel(1, "im.ricochet.chat")
if err != nil {
t.Errorf("Error building open chat channel message: %s", err)
}
// TODO: More Indepth Test Of Output
}
func TestOpenContactRequestChannel(t *testing.T) {
messageBuilder := new(MessageBuilder)
_, err := messageBuilder.OpenContactRequestChannel(3, "Nickname", "Message")
if err != nil {
t.Errorf("Error building open contact request channel message: %s", err)
}
// TODO: More Indepth Test Of Output
}
func TestOpenAuthenticationChannel(t *testing.T) {
messageBuilder := new(MessageBuilder)
_, err := messageBuilder.OpenAuthenticationChannel(1, [16]byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0})
if err != nil {
t.Errorf("Error building open authentication channel message: %s", err)
}
// TODO: More Indepth Test Of Output
}
func TestChatMessage(t *testing.T) {
messageBuilder := new(MessageBuilder)
_, err := messageBuilder.ChatMessage("Hello World", 0)
if err != nil {
t.Errorf("Error building chat message: %s", err)
}
// TODO: More Indepth Test Of Output
}

300
openconnection.go Normal file
View File

@ -0,0 +1,300 @@
package goricochet
import (
"crypto"
"crypto/rsa"
"encoding/asn1"
"github.com/s-rah/go-ricochet/utils"
"net"
)
// OpenConnection encapsulates the state required to maintain a connection to
// a ricochet service.
// Notably OpenConnection does not enforce limits on the channelIDs, channel Assignments
// or the direction of messages. These are considered to be service enforced rules.
// (and services are considered to be the best to define them).
type OpenConnection struct {
conn net.Conn
authHandler map[int32]*AuthenticationHandler
channels map[int32]string
rni utils.RicochetNetworkInterface
Client bool
IsAuthed bool
MyHostname string
OtherHostname string
Closed bool
}
// Init initializes a OpenConnection object to a default state.
func (oc *OpenConnection) Init(outbound bool, conn net.Conn) {
oc.conn = conn
oc.authHandler = make(map[int32]*AuthenticationHandler)
oc.channels = make(map[int32]string)
oc.rni = new(utils.RicochetNetwork)
oc.Client = outbound
oc.IsAuthed = false
oc.MyHostname = ""
oc.OtherHostname = ""
}
// UnsetChannel removes a type association from the channel.
func (oc *OpenConnection) UnsetChannel(channel int32) {
oc.channels[channel] = "none"
}
// GetChannelType returns the type of the channel on this connection
func (oc *OpenConnection) GetChannelType(channel int32) string {
if val, ok := oc.channels[channel]; ok {
return val
}
return "none"
}
func (oc *OpenConnection) setChannel(channel int32, channelType string) {
oc.channels[channel] = channelType
}
// HasChannel returns true if the connection has a channel of an associated type, false otherwise
func (oc *OpenConnection) HasChannel(channelType string) bool {
for _, val := range oc.channels {
if val == channelType {
return true
}
}
return false
}
// CloseChannel closes a given channel
// Prerequisites:
// * Must have previously connected to a service
func (oc *OpenConnection) CloseChannel(channel int32) {
oc.UnsetChannel(channel)
oc.rni.SendRicochetPacket(oc.conn, channel, []byte{})
}
// Close closes the entire connection
func (oc *OpenConnection) Close() {
oc.conn.Close()
oc.Closed = true
}
// Authenticate opens an Authentication Channel and send a client cookie
// Prerequisites:
// * Must have previously connected to a service
func (oc *OpenConnection) Authenticate(channel int32) {
defer utils.RecoverFromError()
oc.authHandler[channel] = new(AuthenticationHandler)
messageBuilder := new(MessageBuilder)
data, err := messageBuilder.OpenAuthenticationChannel(channel, oc.authHandler[channel].GenClientCookie())
utils.CheckError(err)
oc.setChannel(channel, "im.ricochet.auth.hidden-service")
oc.rni.SendRicochetPacket(oc.conn, 0, data)
}
// ConfirmAuthChannel responds to a new authentication request.
// Prerequisites:
// * Must have previously connected to a service
func (oc *OpenConnection) ConfirmAuthChannel(channel int32, clientCookie [16]byte) {
defer utils.RecoverFromError()
oc.authHandler[channel] = new(AuthenticationHandler)
oc.authHandler[channel].AddClientCookie(clientCookie[:])
messageBuilder := new(MessageBuilder)
data, err := messageBuilder.ConfirmAuthChannel(channel, oc.authHandler[channel].GenServerCookie())
utils.CheckError(err)
oc.setChannel(channel, "im.ricochet.auth.hidden-service")
oc.rni.SendRicochetPacket(oc.conn, 0, data)
}
// SendProof sends an authentication proof in response to a challenge.
// Prerequisites:
// * Must have previously connected to a service
// * channel must be of type auth
func (oc *OpenConnection) SendProof(channel int32, serverCookie [16]byte, publicKeyBytes []byte, privateKey *rsa.PrivateKey) {
if oc.authHandler[channel] == nil {
return // NoOp
}
oc.authHandler[channel].AddServerCookie(serverCookie[:])
challenge := oc.authHandler[channel].GenChallenge(oc.MyHostname, oc.OtherHostname)
signature, _ := rsa.SignPKCS1v15(nil, privateKey, crypto.SHA256, challenge)
defer utils.RecoverFromError()
messageBuilder := new(MessageBuilder)
data, err := messageBuilder.Proof(publicKeyBytes, signature)
utils.CheckError(err)
oc.rni.SendRicochetPacket(oc.conn, channel, data)
}
// ValidateProof determines if the given public key and signature align with the
// already established challenge vector for this communication
// Prerequisites:
// * Must have previously connected to a service
// * Client and Server must have already sent their respective cookies (Authenticate and ConfirmAuthChannel)
func (oc *OpenConnection) ValidateProof(channel int32, publicKeyBytes []byte, signature []byte) bool {
if oc.authHandler[channel] == nil {
return false
}
provisionalHostname := utils.GetTorHostname(publicKeyBytes)
publicKey := new(rsa.PublicKey)
_, err := asn1.Unmarshal(publicKeyBytes, publicKey)
if err != nil {
return false
}
challenge := oc.authHandler[channel].GenChallenge(provisionalHostname, oc.MyHostname)
err = rsa.VerifyPKCS1v15(publicKey, crypto.SHA256, challenge[:], signature)
if err == nil {
oc.OtherHostname = provisionalHostname
return true
}
return false
}
// SendAuthenticationResult responds to an existed authentication Proof
// Prerequisites:
// * Must have previously connected to a service
// * channel must be of type auth
func (oc *OpenConnection) SendAuthenticationResult(channel int32, accepted bool, isKnownContact bool) {
defer utils.RecoverFromError()
messageBuilder := new(MessageBuilder)
data, err := messageBuilder.AuthResult(accepted, isKnownContact)
utils.CheckError(err)
oc.rni.SendRicochetPacket(oc.conn, channel, data)
}
// OpenChatChannel opens a new chat channel with the given id
// Prerequisites:
// * Must have previously connected to a service
// * If acting as the client, id must be odd, else even
func (oc *OpenConnection) OpenChatChannel(channel int32) {
defer utils.RecoverFromError()
messageBuilder := new(MessageBuilder)
data, err := messageBuilder.OpenChannel(channel, "im.ricochet.chat")
utils.CheckError(err)
oc.setChannel(channel, "im.ricochet.chat")
oc.rni.SendRicochetPacket(oc.conn, 0, data)
}
// OpenChannel opens a new chat channel with the given id
// Prerequisites:
// * Must have previously connected to a service
// * If acting as the client, id must be odd, else even
func (oc *OpenConnection) OpenChannel(channel int32, channelType string) {
defer utils.RecoverFromError()
messageBuilder := new(MessageBuilder)
data, err := messageBuilder.OpenChannel(channel, channelType)
utils.CheckError(err)
oc.setChannel(channel, channelType)
oc.rni.SendRicochetPacket(oc.conn, 0, data)
}
// AckOpenChannel acknowledges a previously received open channel message
// Prerequisites:
// * Must have previously connected and authenticated to a service
func (oc *OpenConnection) AckOpenChannel(channel int32, channeltype string) {
defer utils.RecoverFromError()
messageBuilder := new(MessageBuilder)
data, err := messageBuilder.AckOpenChannel(channel)
utils.CheckError(err)
oc.setChannel(channel, channeltype)
oc.rni.SendRicochetPacket(oc.conn, 0, data)
}
// RejectOpenChannel acknowledges a rejects a previously received open channel message
// Prerequisites:
// * Must have previously connected
func (oc *OpenConnection) RejectOpenChannel(channel int32, errortype string) {
defer utils.RecoverFromError()
messageBuilder := new(MessageBuilder)
data, err := messageBuilder.RejectOpenChannel(channel, errortype)
utils.CheckError(err)
oc.rni.SendRicochetPacket(oc.conn, 0, data)
}
// SendContactRequest initiates a contact request to the server.
// Prerequisites:
// * Must have previously connected and authenticated to a service
func (oc *OpenConnection) SendContactRequest(channel int32, nick string, message string) {
defer utils.RecoverFromError()
messageBuilder := new(MessageBuilder)
data, err := messageBuilder.OpenContactRequestChannel(channel, nick, message)
utils.CheckError(err)
oc.setChannel(channel, "im.ricochet.contact.request")
oc.rni.SendRicochetPacket(oc.conn, 0, data)
}
// AckContactRequestOnResponse responds a contact request from a client
// Prerequisites:
// * Must have previously connected and authenticated to a service
// * Must have previously received a Contact Request
func (oc *OpenConnection) AckContactRequestOnResponse(channel int32, status string) {
defer utils.RecoverFromError()
messageBuilder := new(MessageBuilder)
data, err := messageBuilder.ReplyToContactRequestOnResponse(channel, status)
utils.CheckError(err)
oc.setChannel(channel, "im.ricochet.contact.request")
oc.rni.SendRicochetPacket(oc.conn, 0, data)
}
// AckContactRequest responds to contact request from a client
// Prerequisites:
// * Must have previously connected and authenticated to a service
// * Must have previously received a Contact Request
func (oc *OpenConnection) AckContactRequest(channel int32, status string) {
defer utils.RecoverFromError()
messageBuilder := new(MessageBuilder)
data, err := messageBuilder.ReplyToContactRequest(channel, status)
utils.CheckError(err)
oc.setChannel(channel, "im.ricochet.contact.request")
oc.rni.SendRicochetPacket(oc.conn, channel, data)
}
// AckChatMessage acknowledges a previously received chat message.
// Prerequisites:
// * Must have previously connected and authenticated to a service
// * Must have established a known contact status with the other service
// * Must have received a Chat message on an open im.ricochet.chat channel with the messageID
func (oc *OpenConnection) AckChatMessage(channel int32, messageID int32) {
defer utils.RecoverFromError()
messageBuilder := new(MessageBuilder)
data, err := messageBuilder.AckChatMessage(messageID)
utils.CheckError(err)
oc.rni.SendRicochetPacket(oc.conn, channel, data)
}
// SendMessage sends a Chat Message (message) to a give Channel (channel).
// Prerequisites:
// * Must have previously connected and authenticated to a service
// * Must have established a known contact status with the other service
// * Must have previously opened channel with OpenChanel of type im.ricochet.chat
func (oc *OpenConnection) SendMessage(channel int32, message string) {
defer utils.RecoverFromError()
messageBuilder := new(MessageBuilder)
data, err := messageBuilder.ChatMessage(message, 0)
utils.CheckError(err)
oc.rni.SendRicochetPacket(oc.conn, channel, data)
}

7
openconnection_test.go Normal file
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@ -0,0 +1,7 @@
package goricochet
import "testing"
func TestOpenConnectionAuth(t *testing.T) {
}

32
policies/timeoutpolicy.go
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@ -1,32 +0,0 @@
package policies
import (
"github.com/s-rah/go-ricochet/utils"
"time"
)
// TimeoutPolicy is a convieance interface for enforcing common timeout patterns
type TimeoutPolicy time.Duration
// Selection of common timeout policies
const (
UnknownPurposeTimeout TimeoutPolicy = TimeoutPolicy(15 * time.Second)
)
// ExecuteAction runs a function and returns an error if it hasn't returned
// by the time specified by TimeoutPolicy
func (tp *TimeoutPolicy) ExecuteAction(action func() error) error {
c := make(chan error)
go func() {
c <- action()
}()
tick := time.Tick(time.Duration(*tp))
select {
case <-tick:
return utils.ActionTimedOutError
case err := <-c:
return err
}
}

30
policies/timeoutpolicy_test.go
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@ -1,30 +0,0 @@
package policies
import (
"testing"
"time"
)
func TestTimeoutPolicy(t *testing.T) {
policy := UnknownPurposeTimeout
result := func() error {
time.Sleep(2 * time.Second)
return nil
}
err := policy.ExecuteAction(result)
if err != nil {
t.Errorf("Action should ahve returned nil: %v", err)
}
}
func TestTimeoutPolicyExpires(t *testing.T) {
policy := TimeoutPolicy(1 * time.Second)
result := func() error {
time.Sleep(5 * time.Second)
return nil
}
err := policy.ExecuteAction(result)
if err == nil {
t.Errorf("Action should have returned err")
}
}

426
ricochet.go
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@ -1,90 +1,396 @@
package goricochet
import (
"github.com/s-rah/go-ricochet/connection"
"errors"
"github.com/golang/protobuf/proto"
"github.com/s-rah/go-ricochet/auth"
"github.com/s-rah/go-ricochet/chat"
"github.com/s-rah/go-ricochet/contact"
"github.com/s-rah/go-ricochet/control"
"github.com/s-rah/go-ricochet/utils"
"io"
"log"
"net"
"strconv"
)
// Open establishes a protocol session on an established net.Conn, and returns a new
// OpenConnection instance representing this connection. On error, the connection
// will be closed. This function blocks until version negotiation has completed.
// The application should call Process() on the returned OpenConnection to continue
// handling protocol messages.
func Open(remoteHostname string) (*connection.Connection, error) {
networkResolver := utils.NetworkResolver{}
conn, remoteHostname, err := networkResolver.Resolve(remoteHostname)
// Ricochet is a protocol to conducting anonymous IM.
type Ricochet struct {
newconns chan *OpenConnection
networkResolver utils.NetworkResolver
rni utils.RicochetNetworkInterface
}
// Init sets up the Ricochet object.
func (r *Ricochet) Init() {
r.newconns = make(chan *OpenConnection)
r.networkResolver = utils.NetworkResolver{}
r.rni = new(utils.RicochetNetwork)
}
// Connect sets up a client ricochet connection to host e.g. qn6uo4cmsrfv4kzq.onion. If this
// function finished successfully then the connection can be assumed to
// be open and authenticated.
// To specify a local port using the format "127.0.0.1:[port]|ricochet-id".
func (r *Ricochet) Connect(host string) (*OpenConnection, error) {
var err error
conn, host, err := r.networkResolver.Resolve(host)
if err != nil {
return nil, err
}
rc, err := negotiateVersion(conn, remoteHostname)
return r.ConnectOpen(conn, host)
}
// ConnectOpen attempts to open up a new connection to the given host. Returns a
// pointer to the OpenConnection or an error.
func (r *Ricochet) ConnectOpen(conn net.Conn, host string) (*OpenConnection, error) {
oc, err := r.negotiateVersion(conn, true)
if err != nil {
conn.Close()
return nil, err
}
return rc, nil
oc.OtherHostname = host
r.newconns <- oc
return oc, nil
}
// negotiate version takes an open network connection and executes
// the ricochet version negotiation procedure.
func negotiateVersion(conn net.Conn, remoteHostname string) (*connection.Connection, error) {
versions := []byte{0x49, 0x4D, 0x01, 0x01}
if n, err := conn.Write(versions); err != nil || n < len(versions) {
return nil, utils.VersionNegotiationError
// Server launches a new server listening on port
func (r *Ricochet) Server(service RicochetService, port int) {
ln, err := net.Listen("tcp", "127.0.0.1:"+strconv.Itoa(port))
if err != nil {
log.Printf("Cannot Listen on Port %v", port)
return
}
res := make([]byte, 1)
if _, err := io.ReadAtLeast(conn, res, len(res)); err != nil {
return nil, utils.VersionNegotiationError
}
if res[0] != 0x01 {
return nil, utils.VersionNegotiationFailed
}
rc := connection.NewOutboundConnection(conn, remoteHostname)
return rc, nil
r.ServeListener(service, ln)
}
// NegotiateVersionInbound takes in a connection and performs version negotiation
// as if that connection was a client. Returns a ricochet connection if successful
// error otherwise.
func NegotiateVersionInbound(conn net.Conn) (*connection.Connection, error) {
// ServeListener processes all messages given by the listener ln with the given
// RicochetService, service.
func (r *Ricochet) ServeListener(service RicochetService, ln net.Listener) {
go r.ProcessMessages(service)
service.OnReady()
for {
// accept connection on port
conn, err := ln.Accept()
if err != nil {
return
}
go r.processNewConnection(conn, service)
}
}
// processNewConnection sets up a new connection
func (r *Ricochet) processNewConnection(conn net.Conn, service RicochetService) {
oc, err := r.negotiateVersion(conn, false)
if err == nil {
r.newconns <- oc
service.OnConnect(oc)
}
}
// ProcessMessages is intended to be a background thread listening for all messages
// a client will send. The given RicochetService will be used to respond to messages.
// Prerequisites:
// * Must have previously issued a successful Connect()
func (r *Ricochet) ProcessMessages(service RicochetService) {
for {
oc := <-r.newconns
if oc == nil {
return
}
go r.processConnection(oc, service)
}
}
// RequestStopMessageLoop requests that the ProcessMessages loop is stopped after handling all currently
// queued new connections.
func (r *Ricochet) RequestStopMessageLoop() {
r.newconns <- nil
}
// ProcessConnection starts a blocking process loop which continually waits for
// new messages to arrive from the connection and uses the given RicochetService
// to process them.
func (r *Ricochet) processConnection(oc *OpenConnection, service RicochetService) {
service.OnConnect(oc)
defer service.OnDisconnect(oc)
for {
if oc.Closed {
return
}
packet, err := r.rni.RecvRicochetPacket(oc.conn)
if err != nil {
oc.Close()
return
}
if len(packet.Data) == 0 {
service.OnChannelClosed(oc, packet.Channel)
continue
}
if packet.Channel == 0 {
res := new(Protocol_Data_Control.Packet)
err := proto.Unmarshal(packet.Data[:], res)
if err != nil {
service.OnGenericError(oc, packet.Channel)
continue
}
if res.GetOpenChannel() != nil {
opm := res.GetOpenChannel()
if oc.GetChannelType(opm.GetChannelIdentifier()) != "none" {
// Channel is already in use.
service.OnBadUsageError(oc, opm.GetChannelIdentifier())
continue
}
// If I am a Client, the server can only open even numbered channels
if oc.Client && opm.GetChannelIdentifier()%2 != 0 {
service.OnBadUsageError(oc, opm.GetChannelIdentifier())
continue
}
// If I am a Server, the client can only open odd numbered channels
if !oc.Client && opm.GetChannelIdentifier()%2 != 1 {
service.OnBadUsageError(oc, opm.GetChannelIdentifier())
continue
}
switch opm.GetChannelType() {
case "im.ricochet.auth.hidden-service":
if oc.Client {
// Servers are authed by default and can't auth with hidden-service
service.OnBadUsageError(oc, opm.GetChannelIdentifier())
} else if oc.IsAuthed {
// Can't auth if already authed
service.OnBadUsageError(oc, opm.GetChannelIdentifier())
} else if oc.HasChannel("im.ricochet.auth.hidden-service") {
// Can't open more than 1 auth channel
service.OnBadUsageError(oc, opm.GetChannelIdentifier())
} else {
clientCookie, err := proto.GetExtension(opm, Protocol_Data_AuthHiddenService.E_ClientCookie)
if err == nil {
clientCookieB := [16]byte{}
copy(clientCookieB[:], clientCookie.([]byte)[:])
service.OnAuthenticationRequest(oc, opm.GetChannelIdentifier(), clientCookieB)
} else {
// Must include Client Cookie
service.OnBadUsageError(oc, opm.GetChannelIdentifier())
}
}
case "im.ricochet.chat":
if !oc.IsAuthed {
// Can't open chat channel if not authorized
service.OnUnauthorizedError(oc, opm.GetChannelIdentifier())
} else if !service.IsKnownContact(oc.OtherHostname) {
// Can't open chat channel if not a known contact
service.OnUnauthorizedError(oc, opm.GetChannelIdentifier())
} else {
service.OnOpenChannelRequest(oc, opm.GetChannelIdentifier(), "im.ricochet.chat")
}
case "im.ricochet.contact.request":
if oc.Client {
// Servers are not allowed to send contact requests
service.OnBadUsageError(oc, opm.GetChannelIdentifier())
} else if !oc.IsAuthed {
// Can't open a contact channel if not authed
service.OnUnauthorizedError(oc, opm.GetChannelIdentifier())
} else if oc.HasChannel("im.ricochet.contact.request") {
// Only 1 contact channel is allowed to be open at a time
service.OnBadUsageError(oc, opm.GetChannelIdentifier())
} else {
contactRequestI, err := proto.GetExtension(opm, Protocol_Data_ContactRequest.E_ContactRequest)
if err == nil {
contactRequest, check := contactRequestI.(*Protocol_Data_ContactRequest.ContactRequest)
if check {
service.OnContactRequest(oc, opm.GetChannelIdentifier(), contactRequest.GetNickname(), contactRequest.GetMessageText())
break
}
}
service.OnBadUsageError(oc, opm.GetChannelIdentifier())
}
default:
service.OnUnknownTypeError(oc, opm.GetChannelIdentifier())
}
} else if res.GetChannelResult() != nil {
crm := res.GetChannelResult()
if crm.GetOpened() {
switch oc.GetChannelType(crm.GetChannelIdentifier()) {
case "im.ricochet.auth.hidden-service":
serverCookie, err := proto.GetExtension(crm, Protocol_Data_AuthHiddenService.E_ServerCookie)
if err == nil {
serverCookieB := [16]byte{}
copy(serverCookieB[:], serverCookie.([]byte)[:])
service.OnAuthenticationChallenge(oc, crm.GetChannelIdentifier(), serverCookieB)
} else {
service.OnBadUsageError(oc, crm.GetChannelIdentifier())
}
case "im.ricochet.chat":
service.OnOpenChannelRequestSuccess(oc, crm.GetChannelIdentifier())
case "im.ricochet.contact.request":
responseI, err := proto.GetExtension(res.GetChannelResult(), Protocol_Data_ContactRequest.E_Response)
if err == nil {
response, check := responseI.(*Protocol_Data_ContactRequest.Response)
if check {
service.OnContactRequestAck(oc, crm.GetChannelIdentifier(), response.GetStatus().String())
break
}
}
service.OnBadUsageError(oc, crm.GetChannelIdentifier())
default:
service.OnBadUsageError(oc, crm.GetChannelIdentifier())
}
} else {
if oc.GetChannelType(crm.GetChannelIdentifier()) != "none" {
service.OnFailedChannelOpen(oc, crm.GetChannelIdentifier(), crm.GetCommonError().String())
} else {
oc.CloseChannel(crm.GetChannelIdentifier())
}
}
} else {
// Unknown Message
oc.CloseChannel(packet.Channel)
}
} else if oc.GetChannelType(packet.Channel) == "im.ricochet.auth.hidden-service" {
res := new(Protocol_Data_AuthHiddenService.Packet)
err := proto.Unmarshal(packet.Data[:], res)
if err != nil {
oc.CloseChannel(packet.Channel)
continue
}
if res.GetProof() != nil && !oc.Client { // Only Clients Send Proofs
service.OnAuthenticationProof(oc, packet.Channel, res.GetProof().GetPublicKey(), res.GetProof().GetSignature(), service.IsKnownContact(oc.OtherHostname))
} else if res.GetResult() != nil && oc.Client { // Only Servers Send Results
service.OnAuthenticationResult(oc, packet.Channel, res.GetResult().GetAccepted(), res.GetResult().GetIsKnownContact())
} else {
// If neither of the above are satisfied we just close the connection
oc.Close()
}
} else if oc.GetChannelType(packet.Channel) == "im.ricochet.chat" {
// NOTE: These auth checks should be redundant, however they
// are included here for defense-in-depth if for some reason
// a previously authed connection becomes untrusted / not known and
// the state is not cleaned up.
if !oc.IsAuthed {
// Can't send chat messages if not authorized
service.OnUnauthorizedError(oc, packet.Channel)
} else if !service.IsKnownContact(oc.OtherHostname) {
// Can't send chat message if not a known contact
service.OnUnauthorizedError(oc, packet.Channel)
} else {
res := new(Protocol_Data_Chat.Packet)
err := proto.Unmarshal(packet.Data[:], res)
if err != nil {
oc.CloseChannel(packet.Channel)
continue
}
if res.GetChatMessage() != nil {
service.OnChatMessage(oc, packet.Channel, int32(res.GetChatMessage().GetMessageId()), res.GetChatMessage().GetMessageText())
} else if res.GetChatAcknowledge() != nil {
service.OnChatMessageAck(oc, packet.Channel, int32(res.GetChatMessage().GetMessageId()))
} else {
// If neither of the above are satisfied we just close the connection
oc.Close()
}
}
} else if oc.GetChannelType(packet.Channel) == "im.ricochet.contact.request" {
// NOTE: These auth checks should be redundant, however they
// are included here for defense-in-depth if for some reason
// a previously authed connection becomes untrusted / not known and
// the state is not cleaned up.
if !oc.Client {
// Clients are not allowed to send contact request responses
service.OnBadUsageError(oc, packet.Channel)
} else if !oc.IsAuthed {
// Can't send a contact request if not authed
service.OnBadUsageError(oc, packet.Channel)
} else {
res := new(Protocol_Data_ContactRequest.Response)
err := proto.Unmarshal(packet.Data[:], res)
log.Printf("%v", res)
if err != nil {
oc.CloseChannel(packet.Channel)
continue
}
service.OnContactRequestAck(oc, packet.Channel, res.GetStatus().String())
}
} else if oc.GetChannelType(packet.Channel) == "none" {
// Invalid Channel Assignment
oc.CloseChannel(packet.Channel)
} else {
oc.Close()
}
}
}
// Perform version negotiation on the connection, and create an OpenConnection if successful
func (r *Ricochet) negotiateVersion(conn net.Conn, outbound bool) (*OpenConnection, error) {
versions := []byte{0x49, 0x4D, 0x01, 0x01}
// Read version response header
header := make([]byte, 3)
if _, err := io.ReadAtLeast(conn, header, len(header)); err != nil {
return nil, err
}
if header[0] != versions[0] || header[1] != versions[1] || header[2] < 1 {
return nil, utils.VersionNegotiationError
}
// Outbound side of the connection sends a list of supported versions
if outbound {
if n, err := conn.Write(versions); err != nil || n < len(versions) {
return nil, err
}
// Read list of supported versions (which is header[2] bytes long)
versionList := make([]byte, header[2])
if _, err := io.ReadAtLeast(conn, versionList, len(versionList)); err != nil {
return nil, utils.VersionNegotiationError
}
res := make([]byte, 1)
if _, err := io.ReadAtLeast(conn, res, len(res)); err != nil {
return nil, err
}
selectedVersion := byte(0xff)
for _, v := range versionList {
if v == 0x01 {
selectedVersion = v
break
if res[0] != 0x01 {
return nil, errors.New("unsupported protocol version")
}
} else {
// Read version response header
header := make([]byte, 3)
if _, err := io.ReadAtLeast(conn, header, len(header)); err != nil {
return nil, err
}
if header[0] != versions[0] || header[1] != versions[1] || header[2] < 1 {
return nil, errors.New("invalid protocol response")
}
// Read list of supported versions (which is header[2] bytes long)
versionList := make([]byte, header[2])
if _, err := io.ReadAtLeast(conn, versionList, len(versionList)); err != nil {
return nil, err
}
selectedVersion := byte(0xff)
for _, v := range versionList {
if v == 0x01 {
selectedVersion = v
break
}
}
if n, err := conn.Write([]byte{selectedVersion}); err != nil || n < 1 {
return nil, err
}
if selectedVersion == 0xff {
return nil, errors.New("no supported protocol version")
}
}
if n, err := conn.Write([]byte{selectedVersion}); err != nil || n < 1 {
return nil, utils.VersionNegotiationFailed
}
if selectedVersion == 0xff {
return nil, utils.VersionNegotiationFailed
}
rc := connection.NewInboundConnection(conn)
return rc, nil
oc := new(OpenConnection)
oc.Init(outbound, conn)
return oc, nil
}

68
ricochet_test.go
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@ -1,68 +0,0 @@
package goricochet
import (
"github.com/s-rah/go-ricochet/utils"
"net"
"testing"
"time"
)
func SimpleServer() {
ln, _ := net.Listen("tcp", "127.0.0.1:11000")
conn, _ := ln.Accept()
b := make([]byte, 4)
n, err := conn.Read(b)
if n == 4 && err == nil {
conn.Write([]byte{0x01})
}
conn.Close()
}
func BadVersionNegotiation() {
ln, _ := net.Listen("tcp", "127.0.0.1:11001")
conn, _ := ln.Accept()
// We are already testing negotiation bytes, we don't care, just send a termination.
conn.Write([]byte{0x00})
conn.Close()
}
func NotRicochetServer() {
ln, _ := net.Listen("tcp", "127.0.0.1:11002")
conn, _ := ln.Accept()
conn.Close()
}
func TestRicochet(t *testing.T) {
go SimpleServer()
// Wait for Server to Initialize
time.Sleep(time.Second)
rc, err := Open("127.0.0.1:11000|abcdefghijklmno.onion")
if err == nil {
if rc.IsInbound {
t.Errorf("RicochetConnection declares itself as an Inbound connection after an Outbound attempt...that shouldn't happen")
}
return
}
t.Errorf("RicochetProtocol: Open Failed: %v", err)
}
func TestBadVersionNegotiation(t *testing.T) {
go BadVersionNegotiation()
time.Sleep(time.Second)
_, err := Open("127.0.0.1:11001|abcdefghijklmno.onion")
if err != utils.VersionNegotiationFailed {
t.Errorf("RicochetProtocol: Server Had No Correct Version - Should Have Failed: err = %v", err)
}
}
func TestNotARicochetServer(t *testing.T) {
go NotRicochetServer()
time.Sleep(time.Second)
_, err := Open("127.0.0.1:11002|abcdefghijklmno.onion")
if err != utils.VersionNegotiationError {
t.Errorf("RicochetProtocol: Server Had No Correct Version - Should Have Failed: err = %v", err)
}
}

36
ricochetservice.go Normal file
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@ -0,0 +1,36 @@
package goricochet
// RicochetService provides an interface for building automated ricochet applications.
type RicochetService interface {
OnReady()
OnConnect(oc *OpenConnection)
OnDisconnect(oc *OpenConnection)
// Authentication Management
OnAuthenticationRequest(oc *OpenConnection, channelID int32, clientCookie [16]byte)
OnAuthenticationChallenge(oc *OpenConnection, channelID int32, serverCookie [16]byte)
OnAuthenticationProof(oc *OpenConnection, channelID int32, publicKey []byte, signature []byte, isKnownContact bool)
OnAuthenticationResult(oc *OpenConnection, channelID int32, result bool, isKnownContact bool)
// Contact Management
IsKnownContact(hostname string) bool
OnContactRequest(oc *OpenConnection, channelID int32, nick string, message string)
OnContactRequestAck(oc *OpenConnection, channelID int32, status string)
// Managing Channels
OnOpenChannelRequest(oc *OpenConnection, channelID int32, channelType string)
OnOpenChannelRequestSuccess(oc *OpenConnection, channelID int32)
OnChannelClosed(oc *OpenConnection, channelID int32)
// Chat Messages
OnChatMessage(oc *OpenConnection, channelID int32, messageID int32, message string)
OnChatMessageAck(oc *OpenConnection, channelID int32, messageID int32)
// Handle Errors
OnFailedChannelOpen(oc *OpenConnection, channelID int32, errorType string)
OnGenericError(oc *OpenConnection, channelID int32)
OnUnknownTypeError(oc *OpenConnection, channelID int32)
OnUnauthorizedError(oc *OpenConnection, channelID int32)
OnBadUsageError(oc *OpenConnection, channelID int32)
OnFailedError(oc *OpenConnection, channelID int32)
}

187
standardricochetservice.go Normal file
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@ -0,0 +1,187 @@
package goricochet
import (
"crypto/rsa"
"crypto/x509"
"encoding/asn1"
"encoding/pem"
"errors"
"github.com/s-rah/go-ricochet/utils"
"io/ioutil"
"log"
)
// StandardRicochetService implements all the necessary flows to implement a
// minimal, protocol compliant Ricochet Service. It can be built on by other
// applications to produce automated riochet applications.
type StandardRicochetService struct {
ricochet *Ricochet
privateKey *rsa.PrivateKey
serverHostname string
}
// Init initializes a StandardRicochetService with the cryptographic key given
// by filename.
func (srs *StandardRicochetService) Init(filename string) error {
srs.ricochet = new(Ricochet)
srs.ricochet.Init()
pemData, err := ioutil.ReadFile(filename)
if err != nil {
return errors.New("Could not setup ricochet service: could not read private key")
}
block, _ := pem.Decode(pemData)
if block == nil || block.Type != "RSA PRIVATE KEY" {
return errors.New("Could not setup ricochet service: no valid PEM data found")
}
srs.privateKey, err = x509.ParsePKCS1PrivateKey(block.Bytes)
if err != nil {
return errors.New("Could not setup ricochet service: could not parse private key")
}
publicKeyBytes, _ := asn1.Marshal(rsa.PublicKey{
N: srs.privateKey.PublicKey.N,
E: srs.privateKey.PublicKey.E,
})
srs.serverHostname = utils.GetTorHostname(publicKeyBytes)
log.Printf("Initialised ricochet service for %s", srs.serverHostname)
return nil
}
// OnReady is called once a Server has been established (by calling Listen)
func (srs *StandardRicochetService) OnReady() {
}
// Listen starts the ricochet service. Listen must be called before any other method (apart from Init)
func (srs *StandardRicochetService) Listen(service RicochetService, port int) {
srs.ricochet.Server(service, port)
}
// Connect can be called to initiate a new client connection to a server
func (srs *StandardRicochetService) Connect(hostname string) error {
log.Printf("Connecting to...%s", hostname)
oc, err := srs.ricochet.Connect(hostname)
if err != nil {
return errors.New("Could not connect to: " + hostname + " " + err.Error())
}
oc.MyHostname = srs.serverHostname
return nil
}
// OnConnect is called when a client or server successfully passes Version Negotiation.
func (srs *StandardRicochetService) OnConnect(oc *OpenConnection) {
if oc.Client {
log.Printf("Sucessefully Connected to %s", oc.OtherHostname)
oc.IsAuthed = true // Connections to Servers are Considered Authenticated by Default
oc.Authenticate(1)
} else {
oc.MyHostname = srs.serverHostname
}
}
// OnDisconnect is called when a connection is closed
func (srs *StandardRicochetService) OnDisconnect(oc *OpenConnection) {
}
// OnAuthenticationRequest is called when a client requests Authentication
func (srs *StandardRicochetService) OnAuthenticationRequest(oc *OpenConnection, channelID int32, clientCookie [16]byte) {
oc.ConfirmAuthChannel(channelID, clientCookie)
}
// OnAuthenticationChallenge constructs a valid authentication challenge to the serverCookie
func (srs *StandardRicochetService) OnAuthenticationChallenge(oc *OpenConnection, channelID int32, serverCookie [16]byte) {
// DER Encode the Public Key
publickeyBytes, _ := asn1.Marshal(rsa.PublicKey{
N: srs.privateKey.PublicKey.N,
E: srs.privateKey.PublicKey.E,
})
oc.SendProof(1, serverCookie, publickeyBytes, srs.privateKey)
}
// OnAuthenticationProof is called when a client sends Proof for an existing authentication challenge
func (srs *StandardRicochetService) OnAuthenticationProof(oc *OpenConnection, channelID int32, publicKey []byte, signature []byte, isKnownContact bool) {
result := oc.ValidateProof(channelID, publicKey, signature)
oc.SendAuthenticationResult(channelID, result, isKnownContact)
oc.IsAuthed = result
oc.CloseChannel(channelID)
}
// OnAuthenticationResult is called once a server has returned the result of the Proof Verification
func (srs *StandardRicochetService) OnAuthenticationResult(oc *OpenConnection, channelID int32, result bool, isKnownContact bool) {
oc.IsAuthed = result
}
// IsKnownContact allows a caller to determine if a hostname an authorized contact.
func (srs *StandardRicochetService) IsKnownContact(hostname string) bool {
return false
}
// OnContactRequest is called when a client sends a new contact request
func (srs *StandardRicochetService) OnContactRequest(oc *OpenConnection, channelID int32, nick string, message string) {
}
// OnContactRequestAck is called when a server sends a reply to an existing contact request
func (srs *StandardRicochetService) OnContactRequestAck(oc *OpenConnection, channelID int32, status string) {
}
// OnOpenChannelRequest is called when a client or server requests to open a new channel
func (srs *StandardRicochetService) OnOpenChannelRequest(oc *OpenConnection, channelID int32, channelType string) {
oc.AckOpenChannel(channelID, channelType)
}
// OnOpenChannelRequestSuccess is called when a client or server responds to an open channel request
func (srs *StandardRicochetService) OnOpenChannelRequestSuccess(oc *OpenConnection, channelID int32) {
}
// OnChannelClosed is called when a client or server closes an existing channel
func (srs *StandardRicochetService) OnChannelClosed(oc *OpenConnection, channelID int32) {
}
// OnChatMessage is called when a new chat message is received.
func (srs *StandardRicochetService) OnChatMessage(oc *OpenConnection, channelID int32, messageID int32, message string) {
oc.AckChatMessage(channelID, messageID)
}
// OnChatMessageAck is called when a new chat message is ascknowledged.
func (srs *StandardRicochetService) OnChatMessageAck(oc *OpenConnection, channelID int32, messageID int32) {
}
// OnFailedChannelOpen is called when a server fails to open a channel
func (srs *StandardRicochetService) OnFailedChannelOpen(oc *OpenConnection, channelID int32, errorType string) {
oc.UnsetChannel(channelID)
}
// OnGenericError is called when a generalized error is returned from the peer
func (srs *StandardRicochetService) OnGenericError(oc *OpenConnection, channelID int32) {
oc.RejectOpenChannel(channelID, "GenericError")
}
//OnUnknownTypeError is called when an unknown type error is returned from the peer
func (srs *StandardRicochetService) OnUnknownTypeError(oc *OpenConnection, channelID int32) {
oc.RejectOpenChannel(channelID, "UnknownTypeError")
}
// OnUnauthorizedError is called when an unathorized error is returned from the peer
func (srs *StandardRicochetService) OnUnauthorizedError(oc *OpenConnection, channelID int32) {
oc.RejectOpenChannel(channelID, "UnauthorizedError")
}
// OnBadUsageError is called when a bad usage error is returned from the peer
func (srs *StandardRicochetService) OnBadUsageError(oc *OpenConnection, channelID int32) {
oc.RejectOpenChannel(channelID, "BadUsageError")
}
// OnFailedError is called when a failed error is returned from the peer
func (srs *StandardRicochetService) OnFailedError(oc *OpenConnection, channelID int32) {
oc.RejectOpenChannel(channelID, "FailedError")
}
// RGetServerHostname returns the generated tor hostname from the private key
func (srs *StandardRicochetService) GetServerHostname() string {
return srs.serverHostname
}

108
standardricochetservice_bad_usage_error_test.go Normal file
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@ -0,0 +1,108 @@
package goricochet
import "testing"
import "time"
import "log"
type TestBadUsageService struct {
StandardRicochetService
BadUsageErrorCount int
UnknownTypeErrorCount int
ChannelClosed int
}
func (ts *TestBadUsageService) OnConnect(oc *OpenConnection) {
if oc.Client {
oc.OpenChannel(17, "im.ricochet.auth.hidden-service") // Fail because no Extension
}
ts.StandardRicochetService.OnConnect(oc)
if oc.Client {
oc.Authenticate(103) // Should Fail because cannot open more than one auth-hidden-service channel at once
}
}
func (ts *TestBadUsageService) OnAuthenticationProof(oc *OpenConnection, channelID int32, publicKey []byte, signature []byte, isKnownContact bool) {
oc.Authenticate(2) // Try to authenticate again...will fail servers don't auth
oc.SendContactRequest(4, "test", "test") // Only clients can send contact requests
ts.StandardRicochetService.OnAuthenticationProof(oc, channelID, publicKey, signature, isKnownContact)
oc.OpenChatChannel(5) // Fail because server can only open even numbered channels
oc.OpenChatChannel(3) // Fail because already in use...
}
// OnContactRequest is called when a client sends a new contact request
func (ts *TestBadUsageService) OnContactRequest(oc *OpenConnection, channelID int32, nick string, message string) {
oc.AckContactRequestOnResponse(channelID, "Pending") // Done to keep the contact request channel open
}
func (ts *TestBadUsageService) OnAuthenticationResult(oc *OpenConnection, channelID int32, result bool, isKnownContact bool) {
ts.StandardRicochetService.OnAuthenticationResult(oc, channelID, result, isKnownContact)
oc.OpenChatChannel(3) // Succeed
oc.OpenChatChannel(3) // Should fail as duplicate (channel already in use)
oc.OpenChatChannel(6) // Should fail because clients are not allowed to open even numbered channels
oc.SendMessage(101, "test") // Should fail as 101 doesn't exist
oc.Authenticate(1) // Try to authenticate again...will fail because we have already authenticated
oc.OpenChannel(19, "im.ricochet.contact.request") // Will Fail
oc.SendContactRequest(11, "test", "test") // Succeed
oc.SendContactRequest(13, "test", "test") // Trigger singleton contact request check
oc.OpenChannel(15, "im.ricochet.not-a-real-type") // Fail UnknownType
}
// OnChannelClose is called when a client or server closes an existing channel
func (ts *TestBadUsageService) OnChannelClosed(oc *OpenConnection, channelID int32) {
if channelID == 101 {
log.Printf("Received Channel Closed: %v", channelID)
ts.ChannelClosed++
}
}
func (ts *TestBadUsageService) OnFailedChannelOpen(oc *OpenConnection, channelID int32, errorType string) {
log.Printf("Failed Channel Open %v %v", channelID, errorType)
ts.StandardRicochetService.OnFailedChannelOpen(oc, channelID, errorType)
if errorType == "BadUsageError" {
ts.BadUsageErrorCount++
} else if errorType == "UnknownTypeError" {
ts.UnknownTypeErrorCount++
}
}
func (ts *TestBadUsageService) IsKnownContact(hostname string) bool {
return true
}
func TestBadUsageServer(t *testing.T) {
ricochetService := new(TestBadUsageService)
err := ricochetService.Init("./private_key")
if err != nil {
t.Errorf("Could not initate ricochet service: %v", err)
}
go ricochetService.Listen(ricochetService, 9884)
time.Sleep(time.Second * 2)
ricochetService2 := new(TestBadUsageService)
err = ricochetService2.Init("./private_key")
if err != nil {
t.Errorf("Could not initate ricochet service: %v", err)
}
go ricochetService2.Listen(ricochetService2, 9885)
err = ricochetService2.Connect("127.0.0.1:9884|kwke2hntvyfqm7dr")
if err != nil {
t.Errorf("Could not connect to ricochet service: %v", err)
}
time.Sleep(time.Second * 3)
if ricochetService2.ChannelClosed != 1 || ricochetService2.BadUsageErrorCount != 7 || ricochetService.BadUsageErrorCount != 4 || ricochetService2.UnknownTypeErrorCount != 1 {
t.Errorf("Invalid number of errors seen Closed:%v, Client Bad Usage:%v UnknownTypeErrorCount: %v, Server Bad Usage: %v ", ricochetService2.ChannelClosed, ricochetService2.BadUsageErrorCount, ricochetService2.UnknownTypeErrorCount, ricochetService.BadUsageErrorCount)
}
}

118
standardricochetservice_test.go Normal file
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@ -0,0 +1,118 @@
package goricochet
import "testing"
import "time"
import "log"
type TestService struct {
StandardRicochetService
ReceivedMessage bool
KnownContact bool // Mocking contact request
}
func (ts *TestService) OnAuthenticationResult(oc *OpenConnection, channelID int32, result bool, isKnownContact bool) {
ts.StandardRicochetService.OnAuthenticationResult(oc, channelID, result, isKnownContact)
if !isKnownContact {
log.Printf("Sending Contact Request")
oc.SendContactRequest(3, "test", "test")
}
}
func (ts *TestService) OnContactRequest(oc *OpenConnection, channelID int32, nick string, message string) {
ts.StandardRicochetService.OnContactRequest(oc, channelID, nick, message)
oc.AckContactRequestOnResponse(channelID, "Pending")
oc.AckContactRequest(channelID, "Accepted")
ts.KnownContact = true
oc.CloseChannel(channelID)
}
func (ts *TestService) OnOpenChannelRequestSuccess(oc *OpenConnection, channelID int32) {
ts.StandardRicochetService.OnOpenChannelRequestSuccess(oc, channelID)
oc.SendMessage(channelID, "TEST MESSAGE")
}
func (ts *TestService) OnContactRequestAck(oc *OpenConnection, channelID int32, status string) {
ts.StandardRicochetService.OnContactRequestAck(oc, channelID, status)
if status == "Accepted" {
log.Printf("Got accepted contact request")
ts.KnownContact = true
oc.OpenChatChannel(5)
} else if status == "Pending" {
log.Printf("Got pending contact request")
}
}
func (ts *TestService) OnChatMessage(oc *OpenConnection, channelID int32, messageID int32, message string) {
ts.StandardRicochetService.OnChatMessage(oc, channelID, messageID, message)
if message == "TEST MESSAGE" {
ts.ReceivedMessage = true
}
}
func (ts *TestService) IsKnownContact(hostname string) bool {
return ts.KnownContact
}
func TestServer(t *testing.T) {
ricochetService := new(TestService)
err := ricochetService.Init("./private_key")
if err != nil {
t.Errorf("Could not initate ricochet service: %v", err)
}
go ricochetService.Listen(ricochetService, 9878)
time.Sleep(time.Second * 2)
ricochetService2 := new(TestService)
err = ricochetService2.Init("./private_key")
if err != nil {
t.Errorf("Could not initate ricochet service: %v", err)
}
go ricochetService2.Listen(ricochetService2, 9879)
err = ricochetService2.Connect("127.0.0.1:9878|kwke2hntvyfqm7dr")
if err != nil {
t.Errorf("Could not connect to ricochet service: %v", err)
}
time.Sleep(time.Second * 5) // Wait a bit longer
if !ricochetService.ReceivedMessage {
t.Errorf("Test server did not receive message")
}
}
func TestServerInvalidKey(t *testing.T) {
ricochetService := new(TestService)
err := ricochetService.Init("./private_key.does.not.exist")
if err == nil {
t.Errorf("Should not have initate ricochet service, private key should not exist")
}
}
func TestServerCouldNotConnect(t *testing.T) {
ricochetService := new(TestService)
err := ricochetService.Init("./private_key")
if err != nil {
t.Errorf("Could not initate ricochet service: %v", err)
}
err = ricochetService.Connect("127.0.0.1:65535|kwke2hntvyfqm7dr")
if err == nil {
t.Errorf("Should not have been been able to connect to 127.0.0.1:65535|kwke2hntvyfqm7dr")
}
}
func TestGetServerHostname(t *testing.T) {
ricochetService := new(TestService)
err := ricochetService.Init("./private_key")
if err != nil {
t.Errorf("Could not initate ricochet service: %v", err)
}
if ricochetService.GetServerHostname() != "kwke2hntvyfqm7dr" {
t.Errorf("GetServerHostname did not return expected 'kwke2hntvyfqm7dr'")
}
}

63
standardricochetservice_unauth_test.go Normal file
View File

@ -0,0 +1,63 @@
package goricochet
import "testing"
import "time"
import "log"
// The purpose of this test is to exercise the Unauthorized Error flows that occur
// when a client attempts to open a Chat Channel or Send a Contact Reuqest before Authentication
// itself with the Service.
type TestUnauthorizedService struct {
StandardRicochetService
FailedToOpen int
}
func (ts *TestUnauthorizedService) OnConnect(oc *OpenConnection) {
if oc.Client {
log.Printf("Attempting Authentication Not Authorized")
oc.IsAuthed = true // Connections to Servers are Considered Authenticated by Default
// REMOVED Authenticate
oc.OpenChatChannel(5)
oc.SendContactRequest(3, "test", "test")
}
}
func (ts *TestUnauthorizedService) OnFailedChannelOpen(oc *OpenConnection, channelID int32, errorType string) {
oc.UnsetChannel(channelID)
if errorType == "UnauthorizedError" {
ts.FailedToOpen++
}
}
func TestUnauthorizedClientReject(t *testing.T) {
ricochetService := new(TestService)
err := ricochetService.Init("./private_key")
if err != nil {
t.Errorf("Could not initate ricochet service: %v", err)
}
go ricochetService.Listen(ricochetService, 9880)
time.Sleep(time.Second * 2)
ricochetService2 := new(TestUnauthorizedService)
err = ricochetService2.Init("./private_key")
if err != nil {
t.Errorf("Could not initate ricochet service: %v", err)
}
go ricochetService2.Listen(ricochetService2, 9881)
err = ricochetService2.Connect("127.0.0.1:9880|kwke2hntvyfqm7dr")
if err != nil {
t.Errorf("Could not connect to ricochet service: %v", err)
}
time.Sleep(time.Second * 2)
if ricochetService2.FailedToOpen != 2 {
t.Errorf("Test server did not reject open channels with unauthorized error")
}
}

60
standardricochetservice_unknown_contact_test.go Normal file
View File

@ -0,0 +1,60 @@
package goricochet
import "testing"
import "time"
import "log"
type TestUnknownContactService struct {
StandardRicochetService
FailedToOpen bool
}
func (ts *TestUnknownContactService) OnAuthenticationResult(oc *OpenConnection, channelID int32, result bool, isKnownContact bool) {
log.Printf("Authentication Result")
ts.StandardRicochetService.OnAuthenticationResult(oc, channelID, result, isKnownContact)
oc.OpenChatChannel(5)
}
func (ts *TestUnknownContactService) OnFailedChannelOpen(oc *OpenConnection, channelID int32, errorType string) {
log.Printf("Failed Channel Open %v", errorType)
oc.UnsetChannel(channelID)
if errorType == "UnauthorizedError" {
ts.FailedToOpen = true
}
}
func (ts *TestUnknownContactService) IsKnownContact(hostname string) bool {
return false
}
func TestUnknownContactServer(t *testing.T) {
ricochetService := new(StandardRicochetService)
err := ricochetService.Init("./private_key")
if err != nil {
t.Errorf("Could not initate ricochet service: %v", err)
}
go ricochetService.Listen(ricochetService, 9882)
time.Sleep(time.Second * 2)
ricochetService2 := new(TestUnknownContactService)
err = ricochetService2.Init("./private_key")
if err != nil {
t.Errorf("Could not initate ricochet service: %v", err)
}
go ricochetService2.Listen(ricochetService2, 9883)
err = ricochetService2.Connect("127.0.0.1:9882|kwke2hntvyfqm7dr")
if err != nil {
t.Errorf("Could not connect to ricochet service: %v", err)
}
time.Sleep(time.Second * 2)
if !ricochetService2.FailedToOpen {
t.Errorf("Test server did receive message should have failed")
}
}

15
testing/private_key
View File

@ -1,15 +0,0 @@
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----

15
testing/private_key_auth_fail_test
View File

@ -1,15 +0,0 @@
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----

3
testing/tests.sh → tests.sh
View File

@ -4,9 +4,6 @@ set -e
pwd
go test -coverprofile=main.cover.out -v .
go test -coverprofile=utils.cover.out -v ./utils
go test -coverprofile=channels.cover.out -v ./channels
go test -coverprofile=connection.cover.out -v ./connection
go test -coverprofile=policies.cover.out -v ./policies
echo "mode: set" > coverage.out && cat *.cover.out | grep -v mode: | sort -r | \
awk '{if($1 != last) {print $0;last=$1}}' >> coverage.out
rm -rf *.cover.out

56
utils/crypto.go
View File

@ -1,56 +0,0 @@
package utils
import (
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"io/ioutil"
"errors"
"crypto/rand"
)
const (
InvalidPrivateKeyFileError = Error("InvalidPrivateKeyFileError")
RICOCHET_KEY_SIZE = 1024
)
// Generate a private key for use
func GeneratePrivateKey() (*rsa.PrivateKey, error) {
privateKey, err := rsa.GenerateKey(rand.Reader, RICOCHET_KEY_SIZE)
if err != nil {
return nil, errors.New("Could not generate key: " + err.Error())
}
privateKeyDer := x509.MarshalPKCS1PrivateKey(privateKey)
return x509.ParsePKCS1PrivateKey(privateKeyDer)
}
// LoadPrivateKeyFromFile loads a private key from a file...
func LoadPrivateKeyFromFile(filename string) (*rsa.PrivateKey, error) {
pemData, err := ioutil.ReadFile(filename)
if err != nil {
return nil, err
}
return ParsePrivateKey(pemData)
}
// Convert a private key string to a usable private key
func ParsePrivateKey(pemData []byte) (*rsa.PrivateKey, error) {
block, _ := pem.Decode(pemData)
if block == nil || block.Type != "RSA PRIVATE KEY" {
return nil, InvalidPrivateKeyFileError
}
return x509.ParsePKCS1PrivateKey(block.Bytes)
}
// turn a private key into storable string
func PrivateKeyToString(privateKey *rsa.PrivateKey) string {
privateKeyBlock := pem.Block{
Type: "RSA PRIVATE KEY",
Headers: nil,
Bytes: x509.MarshalPKCS1PrivateKey(privateKey),
}
return string(pem.EncodeToMemory(&privateKeyBlock))
}

50
utils/error.go
View File

@ -1,45 +1,17 @@
package utils
import (
"fmt"
)
import "fmt"
import "log"
// Error captures various common ricochet errors
type Error string
func (e Error) Error() string { return string(e) }
// Defining Versions
const (
VersionNegotiationError = Error("VersionNegotiationError")
VersionNegotiationFailed = Error("VersionNegotiationFailed")
RicochetConnectionClosed = Error("RicochetConnectionClosed")
RicochetProtocolError = Error("RicochetProtocolError")
UnknownChannelTypeError = Error("UnknownChannelTypeError")
UnauthorizedChannelTypeError = Error("UnauthorizedChannelTypeError")
// Timeout Errors
ActionTimedOutError = Error("ActionTimedOutError")
PeerTimedOutError = Error("PeerTimedOutError")
// Authentication Errors
ClientFailedToAuthenticateError = Error("ClientFailedToAuthenticateError")
ServerRejectedClientConnectionError = Error("ServerRejectedClientConnectionError")
UnauthorizedActionError = Error("UnauthorizedActionError")
ChannelClosedByPeerError = Error("ChannelClosedByPeerError")
// Channel Management Errors
ServerAttemptedToOpenEvenNumberedChannelError = Error("ServerAttemptedToOpenEvenNumberedChannelError")
ClientAttemptedToOpenOddNumberedChannelError = Error("ClientAttemptedToOpenOddNumberedChannelError")
ChannelIDIsAlreadyInUseError = Error("ChannelIDIsAlreadyInUseError")
AttemptToOpenMoreThanOneSingletonChannelError = Error("AttemptToOpenMoreThanOneSingletonChannelError")
// Library Use Errors
PrivateKeyNotSetError = Error("ClientFailedToAuthenticateError")
)
// RecoverFromError doesn't really recover from anything....see comment below
func RecoverFromError() {
if r := recover(); r != nil {
// This should only really happen if there is a failure de/serializing. If
// this does happen then we currently error. In the future we might be
// able to make this nicer.
log.Fatalf("Recovered from panic() - this really shouldn't happen. Reason: %v", r)
}
}
// CheckError is a helper function for panicing on errors which we need to handle
// but should be very rare e.g. failures deserializing a protobuf object that

74
utils/messagebuilder_test.go
View File

@ -1,74 +0,0 @@
package utils
import (
"github.com/golang/protobuf/proto"
"github.com/s-rah/go-ricochet/wire/control"
"testing"
)
func TestOpenChatChannel(t *testing.T) {
messageBuilder := new(MessageBuilder)
messageBuilder.OpenChannel(1, "im.ricochet.chat")
// TODO: More Indepth Test Of Output
}
func TestOpenContactRequestChannel(t *testing.T) {
messageBuilder := new(MessageBuilder)
messageBuilder.OpenContactRequestChannel(3, "Nickname", "Message")
// TODO: More Indepth Test Of Output
}
func TestOpenAuthenticationChannel(t *testing.T) {
messageBuilder := new(MessageBuilder)
messageBuilder.OpenAuthenticationChannel(1, [16]byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0})
// TODO: More Indepth Test Of Output
}
func TestChatMessage(t *testing.T) {
messageBuilder := new(MessageBuilder)
messageBuilder.ChatMessage("Hello World", 0)
// TODO: More Indepth Test Of Output
}
func TestKeepAlive(t *testing.T) {
messageBuilder := new(MessageBuilder)
raw := messageBuilder.KeepAlive(true)
res := new(Protocol_Data_Control.Packet)
err := proto.Unmarshal(raw, res)
if err != nil || res.GetKeepAlive() == nil || !res.GetKeepAlive().GetResponseRequested() {
t.Errorf("Decoding Keep Alive Packet failed or no response requested: %v %v", err, res)
}
}
func TestFeaturesEnabled(t *testing.T) {
messageBuilder := new(MessageBuilder)
features := []string{"feature1", "feature2"}
raw := messageBuilder.FeaturesEnabled(features)
res := new(Protocol_Data_Control.Packet)
err := proto.Unmarshal(raw, res)
if err != nil || res.GetFeaturesEnabled() == nil {
t.Errorf("Decoding FeaturesEnabled Packet failed: %v %v", err, res)
}
for i, v := range res.GetFeaturesEnabled().GetFeature() {
if v != features[i] {
t.Errorf("Requested Features do not match %v %v", res.GetFeaturesEnabled().GetFeature(), features)
}
}
}
func TestEnableFeatures(t *testing.T) {
messageBuilder := new(MessageBuilder)
features := []string{"feature1", "feature2"}
raw := messageBuilder.EnableFeatures(features)
res := new(Protocol_Data_Control.Packet)
err := proto.Unmarshal(raw, res)
if err != nil || res.GetEnableFeatures() == nil {
t.Errorf("Decoding EnableFeatures Packet failed: %v %v", err, res)
}
for i, v := range res.GetEnableFeatures().GetFeature() {
if v != features[i] {
t.Errorf("Requested Features do not match %v %v", res.GetFeaturesEnabled().GetFeature(), features)
}
}
}

12
utils/networking.go
View File

@ -3,14 +3,10 @@ package utils
import (
"bytes"
"encoding/binary"
"errors"
"io"
)
const (
InvalidPacketLengthError = Error("InvalidPacketLengthError")
InvalidChannelIDError = Error("InvalidChannelIDError")
)
// RicochetData is a structure containing the raw data and the channel it the
// message originated on.
type RicochetData struct {
@ -40,11 +36,11 @@ type RicochetNetwork struct {
func (rn *RicochetNetwork) SendRicochetPacket(dst io.Writer, channel int32, data []byte) error {
packet := make([]byte, 4+len(data))
if len(packet) > 65535 {
return InvalidPacketLengthError
return errors.New("packet too large")
}
binary.BigEndian.PutUint16(packet[0:2], uint16(len(packet)))
if channel < 0 || channel > 65535 {
return InvalidChannelIDError
return errors.New("invalid channel ID")
}
binary.BigEndian.PutUint16(packet[2:4], uint16(channel))
copy(packet[4:], data[:])
@ -72,7 +68,7 @@ func (rn *RicochetNetwork) RecvRicochetPacket(reader io.Reader) (RicochetData, e
size := int(binary.BigEndian.Uint16(header[0:2]))
if size < 4 {
return packet, InvalidPacketLengthError
return packet, errors.New("invalid packet length")
}
packet.Channel = int32(binary.BigEndian.Uint16(header[2:4]))

15
utils/networkresolver.go
View File

@ -1,17 +1,12 @@
package utils
import (
"errors"
"golang.org/x/net/proxy"
"net"
"strings"
)
const (
CannotResolveLocalTCPAddressError = Error("CannotResolveLocalTCPAddressError")
CannotDialLocalTCPAddressError = Error("CannotDialLocalTCPAddressError")
CannotDialRicochetAddressError = Error("CannotDialRicochetAddressError")
)
// NetworkResolver allows a client to resolve various hostnames to connections
// The supported types are onions address are:
// * ricochet:jlq67qzo6s4yp3sp
@ -26,11 +21,11 @@ func (nr *NetworkResolver) Resolve(hostname string) (net.Conn, string, error) {
addrParts := strings.Split(hostname, "|")
tcpAddr, err := net.ResolveTCPAddr("tcp", addrParts[0])
if err != nil {
return nil, "", CannotResolveLocalTCPAddressError
return nil, "", errors.New("Cannot Resolve Local TCP Address")
}
conn, err := net.DialTCP("tcp", nil, tcpAddr)
if err != nil {
return nil, "", CannotDialLocalTCPAddressError
return nil, "", errors.New("Cannot Dial Local TCP Address")
}
// return just the onion address, not the local override for the hostname
@ -50,8 +45,8 @@ func (nr *NetworkResolver) Resolve(hostname string) (net.Conn, string, error) {
conn, err := torDialer.Dial("tcp", resolvedHostname+".onion:9878")
if err != nil {
return nil, "", CannotDialRicochetAddressError
return nil, "", errors.New("Cannot Dial Remote Ricochet Address")
}
//conn.SetDeadline(time.Now().Add(5 * time.Second))
return conn, resolvedHostname, nil
}

3
vendor/github.com/golang/protobuf/AUTHORS generated vendored
View File

@ -1,3 +0,0 @@
# This source code refers to The Go Authors for copyright purposes.
# The master list of authors is in the main Go distribution,
# visible at http://tip.golang.org/AUTHORS.

3
vendor/github.com/golang/protobuf/CONTRIBUTORS generated vendored
View File

@ -1,3 +0,0 @@
# This source code was written by the Go contributors.
# The master list of contributors is in the main Go distribution,
# visible at http://tip.golang.org/CONTRIBUTORS.

31
vendor/github.com/golang/protobuf/LICENSE generated vendored
View File

@ -1,31 +0,0 @@
Go support for Protocol Buffers - Google's data interchange format
Copyright 2010 The Go Authors. All rights reserved.
https://github.com/golang/protobuf
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

43
vendor/github.com/golang/protobuf/proto/Makefile generated vendored
View File

@ -1,43 +0,0 @@
# Go support for Protocol Buffers - Google's data interchange format
#
# Copyright 2010 The Go Authors. All rights reserved.
# https://github.com/golang/protobuf
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
install:
go install
test: install generate-test-pbs
go test
generate-test-pbs:
make install
make -C testdata
protoc --go_out=Mtestdata/test.proto=github.com/golang/protobuf/proto/testdata,Mgoogle/protobuf/any.proto=github.com/golang/protobuf/ptypes/any:. proto3_proto/proto3.proto
make

229
vendor/github.com/golang/protobuf/proto/clone.go generated vendored
View File

@ -1,229 +0,0 @@
// Go support for Protocol Buffers - Google's data interchange format
//
// Copyright 2011 The Go Authors. All rights reserved.
// https://github.com/golang/protobuf
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Protocol buffer deep copy and merge.
// TODO: RawMessage.
package proto
import (
"log"
"reflect"
"strings"
)
// Clone returns a deep copy of a protocol buffer.
func Clone(pb Message) Message {
in := reflect.ValueOf(pb)
if in.IsNil() {
return pb
}
out := reflect.New(in.Type().Elem())
// out is empty so a merge is a deep copy.
mergeStruct(out.Elem(), in.Elem())
return out.Interface().(Message)
}
// Merge merges src into dst.
// Required and optional fields that are set in src will be set to that value in dst.
// Elements of repeated fields will be appended.
// Merge panics if src and dst are not the same type, or if dst is nil.
func Merge(dst, src Message) {
in := reflect.ValueOf(src)
out := reflect.ValueOf(dst)
if out.IsNil() {
panic("proto: nil destination")
}
if in.Type() != out.Type() {
// Explicit test prior to mergeStruct so that mistyped nils will fail
panic("proto: type mismatch")
}
if in.IsNil() {
// Merging nil into non-nil is a quiet no-op
return
}
mergeStruct(out.Elem(), in.Elem())
}
func mergeStruct(out, in reflect.Value) {
sprop := GetProperties(in.Type())
for i := 0; i < in.NumField(); i++ {
f := in.Type().Field(i)
if strings.HasPrefix(f.Name, "XXX_") {
continue
}
mergeAny(out.Field(i), in.Field(i), false, sprop.Prop[i])
}
if emIn, ok := extendable(in.Addr().Interface()); ok {
emOut, _ := extendable(out.Addr().Interface())
mIn, muIn := emIn.extensionsRead()
if mIn != nil {
mOut := emOut.extensionsWrite()
muIn.Lock()
mergeExtension(mOut, mIn)
muIn.Unlock()
}
}
uf := in.FieldByName("XXX_unrecognized")
if !uf.IsValid() {
return
}
uin := uf.Bytes()
if len(uin) > 0 {
out.FieldByName("XXX_unrecognized").SetBytes(append([]byte(nil), uin...))
}
}
// mergeAny performs a merge between two values of the same type.
// viaPtr indicates whether the values were indirected through a pointer (implying proto2).
// prop is set if this is a struct field (it may be nil).
func mergeAny(out, in reflect.Value, viaPtr bool, prop *Properties) {
if in.Type() == protoMessageType {
if !in.IsNil() {
if out.IsNil() {
out.Set(reflect.ValueOf(Clone(in.Interface().(Message))))
} else {
Merge(out.Interface().(Message), in.Interface().(Message))
}
}
return
}
switch in.Kind() {
case reflect.Bool, reflect.Float32, reflect.Float64, reflect.Int32, reflect.Int64,
reflect.String, reflect.Uint32, reflect.Uint64:
if !viaPtr && isProto3Zero(in) {
return
}
out.Set(in)
case reflect.Interface:
// Probably a oneof field; copy non-nil values.
if in.IsNil() {
return
}
// Allocate destination if it is not set, or set to a different type.
// Otherwise we will merge as normal.
if out.IsNil() || out.Elem().Type() != in.Elem().Type() {
out.Set(reflect.New(in.Elem().Elem().Type())) // interface -> *T -> T -> new(T)
}
mergeAny(out.Elem(), in.Elem(), false, nil)
case reflect.Map:
if in.Len() == 0 {
return
}
if out.IsNil() {
out.Set(reflect.MakeMap(in.Type()))
}
// For maps with value types of *T or []byte we need to deep copy each value.
elemKind := in.Type().Elem().Kind()
for _, key := range in.MapKeys() {
var val reflect.Value
switch elemKind {
case reflect.Ptr:
val = reflect.New(in.Type().Elem().Elem())
mergeAny(val, in.MapIndex(key), false, nil)
case reflect.Slice:
val = in.MapIndex(key)
val = reflect.ValueOf(append([]byte{}, val.Bytes()...))
default:
val = in.MapIndex(key)
}
out.SetMapIndex(key, val)
}
case reflect.Ptr:
if in.IsNil() {
return
}
if out.IsNil() {
out.Set(reflect.New(in.Elem().Type()))
}
mergeAny(out.Elem(), in.Elem(), true, nil)
case reflect.Slice:
if in.IsNil() {
return
}
if in.Type().Elem().Kind() == reflect.Uint8 {
// []byte is a scalar bytes field, not a repeated field.
// Edge case: if this is in a proto3 message, a zero length
// bytes field is considered the zero value, and should not
// be merged.
if prop != nil && prop.proto3 && in.Len() == 0 {
return
}
// Make a deep copy.
// Append to []byte{} instead of []byte(nil) so that we never end up
// with a nil result.
out.SetBytes(append([]byte{}, in.Bytes()...))
return
}
n := in.Len()
if out.IsNil() {
out.Set(reflect.MakeSlice(in.Type(), 0, n))
}
switch in.Type().Elem().Kind() {
case reflect.Bool, reflect.Float32, reflect.Float64, reflect.Int32, reflect.Int64,
reflect.String, reflect.Uint32, reflect.Uint64:
out.Set(reflect.AppendSlice(out, in))
default:
for i := 0; i < n; i++ {
x := reflect.Indirect(reflect.New(in.Type().Elem()))
mergeAny(x, in.Index(i), false, nil)
out.Set(reflect.Append(out, x))
}
}
case reflect.Struct:
mergeStruct(out, in)
default:
// unknown type, so not a protocol buffer
log.Printf("proto: don't know how to copy %v", in)
}
}
func mergeExtension(out, in map[int32]Extension) {
for extNum, eIn := range in {
eOut := Extension{desc: eIn.desc}
if eIn.value != nil {
v := reflect.New(reflect.TypeOf(eIn.value)).Elem()
mergeAny(v, reflect.ValueOf(eIn.value), false, nil)
eOut.value = v.Interface()
}
if eIn.enc != nil {
eOut.enc = make([]byte, len(eIn.enc))
copy(eOut.enc, eIn.enc)
}
out[extNum] = eOut
}
}

970
vendor/github.com/golang/protobuf/proto/decode.go generated vendored
View File

@ -1,970 +0,0 @@
// Go support for Protocol Buffers - Google's data interchange format
//
// Copyright 2010 The Go Authors. All rights reserved.
// https://github.com/golang/protobuf
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package proto
/*
* Routines for decoding protocol buffer data to construct in-memory representations.
*/
import (
"errors"
"fmt"
"io"
"os"
"reflect"
)
// errOverflow is returned when an integer is too large to be represented.
var errOverflow = errors.New("proto: integer overflow")
// ErrInternalBadWireType is returned by generated code when an incorrect
// wire type is encountered. It does not get returned to user code.
var ErrInternalBadWireType = errors.New("proto: internal error: bad wiretype for oneof")
// The fundamental decoders that interpret bytes on the wire.
// Those that take integer types all return uint64 and are
// therefore of type valueDecoder.
// DecodeVarint reads a varint-encoded integer from the slice.
// It returns the integer and the number of bytes consumed, or
// zero if there is not enough.
// This is the format for the
// int32, int64, uint32, uint64, bool, and enum
// protocol buffer types.
func DecodeVarint(buf []byte) (x uint64, n int) {
for shift := uint(0); shift < 64; shift += 7 {
if n >= len(buf) {
return 0, 0
}
b := uint64(buf[n])
n++
x |= (b & 0x7F) << shift
if (b & 0x80) == 0 {
return x, n
}
}
// The number is too large to represent in a 64-bit value.
return 0, 0
}
func (p *Buffer) decodeVarintSlow() (x uint64, err error) {
i := p.index
l := len(p.buf)
for shift := uint(0); shift < 64; shift += 7 {
if i >= l {
err = io.ErrUnexpectedEOF
return
}
b := p.buf[i]
i++
x |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
p.index = i
return
}
}
// The number is too large to represent in a 64-bit value.
err = errOverflow
return
}
// DecodeVarint reads a varint-encoded integer from the Buffer.
// This is the format for the
// int32, int64, uint32, uint64, bool, and enum
// protocol buffer types.
func (p *Buffer) DecodeVarint() (x uint64, err error) {
i := p.index
buf := p.buf
if i >= len(buf) {
return 0, io.ErrUnexpectedEOF
} else if buf[i] < 0x80 {
p.index++
return uint64(buf[i]), nil
} else if len(buf)-i < 10 {
return p.decodeVarintSlow()
}
var b uint64
// we already checked the first byte
x = uint64(buf[i]) - 0x80
i++
b = uint64(buf[i])
i++
x += b << 7
if b&0x80 == 0 {
goto done
}
x -= 0x80 << 7
b = uint64(buf[i])
i++
x += b << 14
if b&0x80 == 0 {
goto done
}
x -= 0x80 << 14
b = uint64(buf[i])
i++
x += b << 21
if b&0x80 == 0 {
goto done
}
x -= 0x80 << 21
b = uint64(buf[i])
i++
x += b << 28
if b&0x80 == 0 {
goto done
}
x -= 0x80 << 28
b = uint64(buf[i])
i++
x += b << 35
if b&0x80 == 0 {
goto done
}
x -= 0x80 << 35
b = uint64(buf[i])
i++
x += b << 42
if b&0x80 == 0 {
goto done
}
x -= 0x80 << 42
b = uint64(buf[i])
i++
x += b << 49
if b&0x80 == 0 {
goto done
}
x -= 0x80 << 49
b = uint64(buf[i])
i++
x += b << 56
if b&0x80 == 0 {
goto done
}
x -= 0x80 << 56
b = uint64(buf[i])
i++
x += b << 63
if b&0x80 == 0 {
goto done
}
// x -= 0x80 << 63 // Always zero.
return 0, errOverflow
done:
p.index = i
return x, nil
}
// DecodeFixed64 reads a 64-bit integer from the Buffer.
// This is the format for the
// fixed64, sfixed64, and double protocol buffer types.
func (p *Buffer) DecodeFixed64() (x uint64, err error) {
// x, err already 0
i := p.index + 8
if i < 0 || i > len(p.buf) {
err = io.ErrUnexpectedEOF
return
}
p.index = i
x = uint64(p.buf[i-8])
x |= uint64(p.buf[i-7]) << 8
x |= uint64(p.buf[i-6]) << 16
x |= uint64(p.buf[i-5]) << 24
x |= uint64(p.buf[i-4]) << 32
x |= uint64(p.buf[i-3]) << 40
x |= uint64(p.buf[i-2]) << 48
x |= uint64(p.buf[i-1]) << 56
return
}
// DecodeFixed32 reads a 32-bit integer from the Buffer.
// This is the format for the
// fixed32, sfixed32, and float protocol buffer types.
func (p *Buffer) DecodeFixed32() (x uint64, err error) {
// x, err already 0
i := p.index + 4
if i < 0 || i > len(p.buf) {
err = io.ErrUnexpectedEOF
return
}
p.index = i
x = uint64(p.buf[i-4])
x |= uint64(p.buf[i-3]) << 8
x |= uint64(p.buf[i-2]) << 16
x |= uint64(p.buf[i-1]) << 24
return
}
// DecodeZigzag64 reads a zigzag-encoded 64-bit integer
// from the Buffer.
// This is the format used for the sint64 protocol buffer type.
func (p *Buffer) DecodeZigzag64() (x uint64, err error) {
x, err = p.DecodeVarint()
if err != nil {
return
}
x = (x >> 1) ^ uint64((int64(x&1)<<63)>>63)
return
}
// DecodeZigzag32 reads a zigzag-encoded 32-bit integer
// from the Buffer.
// This is the format used for the sint32 protocol buffer type.
func (p *Buffer) DecodeZigzag32() (x uint64, err error) {
x, err = p.DecodeVarint()
if err != nil {
return
}
x = uint64((uint32(x) >> 1) ^ uint32((int32(x&1)<<31)>>31))
return
}
// These are not ValueDecoders: they produce an array of bytes or a string.
// bytes, embedded messages
// DecodeRawBytes reads a count-delimited byte buffer from the Buffer.
// This is the format used for the bytes protocol buffer
// type and for embedded messages.
func (p *Buffer) DecodeRawBytes(alloc bool) (buf []byte, err error) {
n, err := p.DecodeVarint()
if err != nil {
return nil, err
}
nb := int(n)
if nb < 0 {
return nil, fmt.Errorf("proto: bad byte length %d", nb)
}
end := p.index + nb
if end < p.index || end > len(p.buf) {
return nil, io.ErrUnexpectedEOF
}
if !alloc {
// todo: check if can get more uses of alloc=false
buf = p.buf[p.index:end]
p.index += nb
return
}
buf = make([]byte, nb)
copy(buf, p.buf[p.index:])
p.index += nb
return
}
// DecodeStringBytes reads an encoded string from the Buffer.
// This is the format used for the proto2 string type.
func (p *Buffer) DecodeStringBytes() (s string, err error) {
buf, err := p.DecodeRawBytes(false)
if err != nil {
return
}
return string(buf), nil
}
// Skip the next item in the buffer. Its wire type is decoded and presented as an argument.
// If the protocol buffer has extensions, and the field matches, add it as an extension.
// Otherwise, if the XXX_unrecognized field exists, append the skipped data there.
func (o *Buffer) skipAndSave(t reflect.Type, tag, wire int, base structPointer, unrecField field) error {
oi := o.index
err := o.skip(t, tag, wire)
if err != nil {
return err
}
if !unrecField.IsValid() {
return nil
}
ptr := structPointer_Bytes(base, unrecField)
// Add the skipped field to struct field
obuf := o.buf
o.buf = *ptr
o.EncodeVarint(uint64(tag<<3 | wire))
*ptr = append(o.buf, obuf[oi:o.index]...)
o.buf = obuf
return nil
}
// Skip the next item in the buffer. Its wire type is decoded and presented as an argument.
func (o *Buffer) skip(t reflect.Type, tag, wire int) error {
var u uint64
var err error
switch wire {
case WireVarint:
_, err = o.DecodeVarint()
case WireFixed64:
_, err = o.DecodeFixed64()
case WireBytes:
_, err = o.DecodeRawBytes(false)
case WireFixed32:
_, err = o.DecodeFixed32()
case WireStartGroup:
for {
u, err = o.DecodeVarint()
if err != nil {
break
}
fwire := int(u & 0x7)
if fwire == WireEndGroup {
break
}
ftag := int(u >> 3)
err = o.skip(t, ftag, fwire)
if err != nil {
break
}
}
default:
err = fmt.Errorf("proto: can't skip unknown wire type %d for %s", wire, t)
}
return err
}
// Unmarshaler is the interface representing objects that can
// unmarshal themselves. The method should reset the receiver before
// decoding starts. The argument points to data that may be
// overwritten, so implementations should not keep references to the
// buffer.
type Unmarshaler interface {
Unmarshal([]byte) error
}
// Unmarshal parses the protocol buffer representation in buf and places the
// decoded result in pb. If the struct underlying pb does not match
// the data in buf, the results can be unpredictable.
//
// Unmarshal resets pb before starting to unmarshal, so any
// existing data in pb is always removed. Use UnmarshalMerge
// to preserve and append to existing data.
func Unmarshal(buf []byte, pb Message) error {
pb.Reset()
return UnmarshalMerge(buf, pb)
}
// UnmarshalMerge parses the protocol buffer representation in buf and
// writes the decoded result to pb. If the struct underlying pb does not match
// the data in buf, the results can be unpredictable.
//
// UnmarshalMerge merges into existing data in pb.
// Most code should use Unmarshal instead.
func UnmarshalMerge(buf []byte, pb Message) error {
// If the object can unmarshal itself, let it.
if u, ok := pb.(Unmarshaler); ok {
return u.Unmarshal(buf)
}
return NewBuffer(buf).Unmarshal(pb)
}
// DecodeMessage reads a count-delimited message from the Buffer.
func (p *Buffer) DecodeMessage(pb Message) error {
enc, err := p.DecodeRawBytes(false)
if err != nil {
return err
}
return NewBuffer(enc).Unmarshal(pb)
}
// DecodeGroup reads a tag-delimited group from the Buffer.
func (p *Buffer) DecodeGroup(pb Message) error {
typ, base, err := getbase(pb)
if err != nil {
return err
}
return p.unmarshalType(typ.Elem(), GetProperties(typ.Elem()), true, base)
}
// Unmarshal parses the protocol buffer representation in the
// Buffer and places the decoded result in pb. If the struct
// underlying pb does not match the data in the buffer, the results can be
// unpredictable.
//
// Unlike proto.Unmarshal, this does not reset pb before starting to unmarshal.
func (p *Buffer) Unmarshal(pb Message) error {
// If the object can unmarshal itself, let it.
if u, ok := pb.(Unmarshaler); ok {
err := u.Unmarshal(p.buf[p.index:])
p.index = len(p.buf)
return err
}
typ, base, err := getbase(pb)
if err != nil {
return err
}
err = p.unmarshalType(typ.Elem(), GetProperties(typ.Elem()), false, base)
if collectStats {
stats.Decode++
}
return err
}
// unmarshalType does the work of unmarshaling a structure.
func (o *Buffer) unmarshalType(st reflect.Type, prop *StructProperties, is_group bool, base structPointer) error {
var state errorState
required, reqFields := prop.reqCount, uint64(0)
var err error
for err == nil && o.index < len(o.buf) {
oi := o.index
var u uint64
u, err = o.DecodeVarint()
if err != nil {
break
}
wire := int(u & 0x7)
if wire == WireEndGroup {
if is_group {
if required > 0 {
// Not enough information to determine the exact field.
// (See below.)
return &RequiredNotSetError{"{Unknown}"}
}
return nil // input is satisfied
}
return fmt.Errorf("proto: %s: wiretype end group for non-group", st)
}
tag := int(u >> 3)
if tag <= 0 {
return fmt.Errorf("proto: %s: illegal tag %d (wire type %d)", st, tag, wire)
}
fieldnum, ok := prop.decoderTags.get(tag)
if !ok {
// Maybe it's an extension?
if prop.extendable {
if e, _ := extendable(structPointer_Interface(base, st)); isExtensionField(e, int32(tag)) {
if err = o.skip(st, tag, wire); err == nil {
extmap := e.extensionsWrite()
ext := extmap[int32(tag)] // may be missing
ext.enc = append(ext.enc, o.buf[oi:o.index]...)
extmap[int32(tag)] = ext
}
continue
}
}
// Maybe it's a oneof?
if prop.oneofUnmarshaler != nil {
m := structPointer_Interface(base, st).(Message)
// First return value indicates whether tag is a oneof field.
ok, err = prop.oneofUnmarshaler(m, tag, wire, o)
if err == ErrInternalBadWireType {
// Map the error to something more descriptive.
// Do the formatting here to save generated code space.
err = fmt.Errorf("bad wiretype for oneof field in %T", m)
}
if ok {
continue
}
}
err = o.skipAndSave(st, tag, wire, base, prop.unrecField)
continue
}
p := prop.Prop[fieldnum]
if p.dec == nil {
fmt.Fprintf(os.Stderr, "proto: no protobuf decoder for %s.%s\n", st, st.Field(fieldnum).Name)
continue
}
dec := p.dec
if wire != WireStartGroup && wire != p.WireType {
if wire == WireBytes && p.packedDec != nil {
// a packable field
dec = p.packedDec
} else {
err = fmt.Errorf("proto: bad wiretype for field %s.%s: got wiretype %d, want %d", st, st.Field(fieldnum).Name, wire, p.WireType)
continue
}
}
decErr := dec(o, p, base)
if decErr != nil && !state.shouldContinue(decErr, p) {
err = decErr
}
if err == nil && p.Required {
// Successfully decoded a required field.
if tag <= 64 {
// use bitmap for fields 1-64 to catch field reuse.
var mask uint64 = 1 << uint64(tag-1)
if reqFields&mask == 0 {
// new required field
reqFields |= mask
required--
}
} else {
// This is imprecise. It can be fooled by a required field
// with a tag > 64 that is encoded twice; that's very rare.
// A fully correct implementation would require allocating
// a data structure, which we would like to avoid.
required--
}
}
}
if err == nil {
if is_group {
return io.ErrUnexpectedEOF
}
if state.err != nil {
return state.err
}
if required > 0 {
// Not enough information to determine the exact field. If we use extra
// CPU, we could determine the field only if the missing required field
// has a tag <= 64 and we check reqFields.
return &RequiredNotSetError{"{Unknown}"}
}
}
return err
}
// Individual type decoders
// For each,
// u is the decoded value,
// v is a pointer to the field (pointer) in the struct
// Sizes of the pools to allocate inside the Buffer.
// The goal is modest amortization and allocation
// on at least 16-byte boundaries.
const (
boolPoolSize = 16
uint32PoolSize = 8
uint64PoolSize = 4
)
// Decode a bool.
func (o *Buffer) dec_bool(p *Properties, base structPointer) error {
u, err := p.valDec(o)
if err != nil {
return err
}
if len(o.bools) == 0 {
o.bools = make([]bool, boolPoolSize)
}
o.bools[0] = u != 0
*structPointer_Bool(base, p.field) = &o.bools[0]
o.bools = o.bools[1:]
return nil
}
func (o *Buffer) dec_proto3_bool(p *Properties, base structPointer) error {
u, err := p.valDec(o)
if err != nil {
return err
}
*structPointer_BoolVal(base, p.field) = u != 0
return nil
}
// Decode an int32.
func (o *Buffer) dec_int32(p *Properties, base structPointer) error {
u, err := p.valDec(o)
if err != nil {
return err
}
word32_Set(structPointer_Word32(base, p.field), o, uint32(u))
return nil
}
func (o *Buffer) dec_proto3_int32(p *Properties, base structPointer) error {
u, err := p.valDec(o)
if err != nil {
return err
}
word32Val_Set(structPointer_Word32Val(base, p.field), uint32(u))
return nil
}
// Decode an int64.
func (o *Buffer) dec_int64(p *Properties, base structPointer) error {
u, err := p.valDec(o)
if err != nil {
return err
}
word64_Set(structPointer_Word64(base, p.field), o, u)
return nil
}
func (o *Buffer) dec_proto3_int64(p *Properties, base structPointer) error {
u, err := p.valDec(o)
if err != nil {
return err
}
word64Val_Set(structPointer_Word64Val(base, p.field), o, u)
return nil
}
// Decode a string.
func (o *Buffer) dec_string(p *Properties, base structPointer) error {
s, err := o.DecodeStringBytes()
if err != nil {
return err
}
*structPointer_String(base, p.field) = &s
return nil
}
func (o *Buffer) dec_proto3_string(p *Properties, base structPointer) error {
s, err := o.DecodeStringBytes()
if err != nil {
return err
}
*structPointer_StringVal(base, p.field) = s
return nil
}
// Decode a slice of bytes ([]byte).
func (o *Buffer) dec_slice_byte(p *Properties, base structPointer) error {
b, err := o.DecodeRawBytes(true)
if err != nil {
return err
}
*structPointer_Bytes(base, p.field) = b
return nil
}
// Decode a slice of bools ([]bool).
func (o *Buffer) dec_slice_bool(p *Properties, base structPointer) error {
u, err := p.valDec(o)
if err != nil {
return err
}
v := structPointer_BoolSlice(base, p.field)
*v = append(*v, u != 0)
return nil
}
// Decode a slice of bools ([]bool) in packed format.
func (o *Buffer) dec_slice_packed_bool(p *Properties, base structPointer) error {
v := structPointer_BoolSlice(base, p.field)
nn, err := o.DecodeVarint()
if err != nil {
return err
}
nb := int(nn) // number of bytes of encoded bools
fin := o.index + nb
if fin < o.index {
return errOverflow
}
y := *v
for o.index < fin {
u, err := p.valDec(o)
if err != nil {
return err
}
y = append(y, u != 0)
}
*v = y
return nil
}
// Decode a slice of int32s ([]int32).
func (o *Buffer) dec_slice_int32(p *Properties, base structPointer) error {
u, err := p.valDec(o)
if err != nil {
return err
}
structPointer_Word32Slice(base, p.field).Append(uint32(u))
return nil
}
// Decode a slice of int32s ([]int32) in packed format.
func (o *Buffer) dec_slice_packed_int32(p *Properties, base structPointer) error {
v := structPointer_Word32Slice(base, p.field)
nn, err := o.DecodeVarint()
if err != nil {
return err
}
nb := int(nn) // number of bytes of encoded int32s
fin := o.index + nb
if fin < o.index {
return errOverflow
}
for o.index < fin {
u, err := p.valDec(o)
if err != nil {
return err
}
v.Append(uint32(u))
}
return nil
}
// Decode a slice of int64s ([]int64).
func (o *Buffer) dec_slice_int64(p *Properties, base structPointer) error {
u, err := p.valDec(o)
if err != nil {
return err
}
structPointer_Word64Slice(base, p.field).Append(u)
return nil
}
// Decode a slice of int64s ([]int64) in packed format.
func (o *Buffer) dec_slice_packed_int64(p *Properties, base structPointer) error {
v := structPointer_Word64Slice(base, p.field)
nn, err := o.DecodeVarint()
if err != nil {
return err
}
nb := int(nn) // number of bytes of encoded int64s
fin := o.index + nb
if fin < o.index {
return errOverflow
}
for o.index < fin {
u, err := p.valDec(o)
if err != nil {
return err
}
v.Append(u)
}
return nil
}
// Decode a slice of strings ([]string).
func (o *Buffer) dec_slice_string(p *Properties, base structPointer) error {
s, err := o.DecodeStringBytes()
if err != nil {
return err
}
v := structPointer_StringSlice(base, p.field)
*v = append(*v, s)
return nil
}
// Decode a slice of slice of bytes ([][]byte).
func (o *Buffer) dec_slice_slice_byte(p *Properties, base structPointer) error {
b, err := o.DecodeRawBytes(true)
if err != nil {
return err
}
v := structPointer_BytesSlice(base, p.field)
*v = append(*v, b)
return nil
}
// Decode a map field.
func (o *Buffer) dec_new_map(p *Properties, base structPointer) error {
raw, err := o.DecodeRawBytes(false)
if err != nil {
return err
}
oi := o.index // index at the end of this map entry
o.index -= len(raw) // move buffer back to start of map entry
mptr := structPointer_NewAt(base, p.field, p.mtype) // *map[K]V
if mptr.Elem().IsNil() {
mptr.Elem().Set(reflect.MakeMap(mptr.Type().Elem()))
}
v := mptr.Elem() // map[K]V
// Prepare addressable doubly-indirect placeholders for the key and value types.
// See enc_new_map for why.
keyptr := reflect.New(reflect.PtrTo(p.mtype.Key())).Elem() // addressable *K
keybase := toStructPointer(keyptr.Addr()) // **K
var valbase structPointer
var valptr reflect.Value
switch p.mtype.Elem().Kind() {
case reflect.Slice:
// []byte
var dummy []byte
valptr = reflect.ValueOf(&dummy) // *[]byte
valbase = toStructPointer(valptr) // *[]byte
case reflect.Ptr:
// message; valptr is **Msg; need to allocate the intermediate pointer
valptr = reflect.New(reflect.PtrTo(p.mtype.Elem())).Elem() // addressable *V
valptr.Set(reflect.New(valptr.Type().Elem()))
valbase = toStructPointer(valptr)
default:
// everything else
valptr = reflect.New(reflect.PtrTo(p.mtype.Elem())).Elem() // addressable *V
valbase = toStructPointer(valptr.Addr()) // **V
}
// Decode.
// This parses a restricted wire format, namely the encoding of a message
// with two fields. See enc_new_map for the format.
for o.index < oi {
// tagcode for key and value properties are always a single byte
// because they have tags 1 and 2.
tagcode := o.buf[o.index]
o.index++
switch tagcode {
case p.mkeyprop.tagcode[0]:
if err := p.mkeyprop.dec(o, p.mkeyprop, keybase); err != nil {
return err
}
case p.mvalprop.tagcode[0]:
if err := p.mvalprop.dec(o, p.mvalprop, valbase); err != nil {
return err
}
default:
// TODO: Should we silently skip this instead?
return fmt.Errorf("proto: bad map data tag %d", raw[0])
}
}
keyelem, valelem := keyptr.Elem(), valptr.Elem()
if !keyelem.IsValid() {
keyelem = reflect.Zero(p.mtype.Key())
}
if !valelem.IsValid() {
valelem = reflect.Zero(p.mtype.Elem())
}
v.SetMapIndex(keyelem, valelem)
return nil
}
// Decode a group.
func (o *Buffer) dec_struct_group(p *Properties, base structPointer) error {
bas := structPointer_GetStructPointer(base, p.field)
if structPointer_IsNil(bas) {
// allocate new nested message
bas = toStructPointer(reflect.New(p.stype))
structPointer_SetStructPointer(base, p.field, bas)
}
return o.unmarshalType(p.stype, p.sprop, true, bas)
}
// Decode an embedded message.
func (o *Buffer) dec_struct_message(p *Properties, base structPointer) (err error) {
raw, e := o.DecodeRawBytes(false)
if e != nil {
return e
}
bas := structPointer_GetStructPointer(base, p.field)
if structPointer_IsNil(bas) {
// allocate new nested message
bas = toStructPointer(reflect.New(p.stype))
structPointer_SetStructPointer(base, p.field, bas)
}
// If the object can unmarshal itself, let it.
if p.isUnmarshaler {
iv := structPointer_Interface(bas, p.stype)
return iv.(Unmarshaler).Unmarshal(raw)
}
obuf := o.buf
oi := o.index
o.buf = raw
o.index = 0
err = o.unmarshalType(p.stype, p.sprop, false, bas)
o.buf = obuf
o.index = oi
return err
}
// Decode a slice of embedded messages.
func (o *Buffer) dec_slice_struct_message(p *Properties, base structPointer) error {
return o.dec_slice_struct(p, false, base)
}
// Decode a slice of embedded groups.
func (o *Buffer) dec_slice_struct_group(p *Properties, base structPointer) error {
return o.dec_slice_struct(p, true, base)
}
// Decode a slice of structs ([]*struct).
func (o *Buffer) dec_slice_struct(p *Properties, is_group bool, base structPointer) error {
v := reflect.New(p.stype)
bas := toStructPointer(v)
structPointer_StructPointerSlice(base, p.field).Append(bas)
if is_group {
err := o.unmarshalType(p.stype, p.sprop, is_group, bas)
return err
}
raw, err := o.DecodeRawBytes(false)
if err != nil {
return err
}
// If the object can unmarshal itself, let it.
if p.isUnmarshaler {
iv := v.Interface()
return iv.(Unmarshaler).Unmarshal(raw)
}
obuf := o.buf
oi := o.index
o.buf = raw
o.index = 0
err = o.unmarshalType(p.stype, p.sprop, is_group, bas)
o.buf = obuf
o.index = oi
return err
}

1362
vendor/github.com/golang/protobuf/proto/encode.go generated vendored
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300
vendor/github.com/golang/protobuf/proto/equal.go generated vendored
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@ -1,300 +0,0 @@
// Go support for Protocol Buffers - Google's data interchange format
//
// Copyright 2011 The Go Authors. All rights reserved.
// https://github.com/golang/protobuf
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Protocol buffer comparison.
package proto
import (
"bytes"
"log"
"reflect"
"strings"
)
/*
Equal returns true iff protocol buffers a and b are equal.
The arguments must both be pointers to protocol buffer structs.
Equality is defined in this way:
- Two messages are equal iff they are the same type,
corresponding fields are equal, unknown field sets
are equal, and extensions sets are equal.
- Two set scalar fields are equal iff their values are equal.
If the fields are of a floating-point type, remember that
NaN != x for all x, including NaN. If the message is defined
in a proto3 .proto file, fields are not "set"; specifically,
zero length proto3 "bytes" fields are equal (nil == {}).
- Two repeated fields are equal iff their lengths are the same,
and their corresponding elements are equal. Note a "bytes" field,
although represented by []byte, is not a repeated field and the
rule for the scalar fields described above applies.
- Two unset fields are equal.
- Two unknown field sets are equal if their current
encoded state is equal.
- Two extension sets are equal iff they have corresponding
elements that are pairwise equal.
- Two map fields are equal iff their lengths are the same,
and they contain the same set of elements. Zero-length map
fields are equal.
- Every other combination of things are not equal.
The return value is undefined if a and b are not protocol buffers.
*/
func Equal(a, b Message) bool {
if a == nil || b == nil {
return a == b
}
v1, v2 := reflect.ValueOf(a), reflect.ValueOf(b)
if v1.Type() != v2.Type() {
return false
}
if v1.Kind() == reflect.Ptr {
if v1.IsNil() {
return v2.IsNil()
}
if v2.IsNil() {
return false
}
v1, v2 = v1.Elem(), v2.Elem()
}
if v1.Kind() != reflect.Struct {
return false
}
return equalStruct(v1, v2)
}
// v1 and v2 are known to have the same type.
func equalStruct(v1, v2 reflect.Value) bool {
sprop := GetProperties(v1.Type())
for i := 0; i < v1.NumField(); i++ {
f := v1.Type().Field(i)
if strings.HasPrefix(f.Name, "XXX_") {
continue
}
f1, f2 := v1.Field(i), v2.Field(i)
if f.Type.Kind() == reflect.Ptr {
if n1, n2 := f1.IsNil(), f2.IsNil(); n1 && n2 {
// both unset
continue
} else if n1 != n2 {
// set/unset mismatch
return false
}
b1, ok := f1.Interface().(raw)
if ok {
b2 := f2.Interface().(raw)
// RawMessage
if !bytes.Equal(b1.Bytes(), b2.Bytes()) {
return false
}
continue
}
f1, f2 = f1.Elem(), f2.Elem()
}
if !equalAny(f1, f2, sprop.Prop[i]) {
return false
}
}
if em1 := v1.FieldByName("XXX_InternalExtensions"); em1.IsValid() {
em2 := v2.FieldByName("XXX_InternalExtensions")
if !equalExtensions(v1.Type(), em1.Interface().(XXX_InternalExtensions), em2.Interface().(XXX_InternalExtensions)) {
return false
}
}
if em1 := v1.FieldByName("XXX_extensions"); em1.IsValid() {
em2 := v2.FieldByName("XXX_extensions")
if !equalExtMap(v1.Type(), em1.Interface().(map[int32]Extension), em2.Interface().(map[int32]Extension)) {
return false
}
}
uf := v1.FieldByName("XXX_unrecognized")
if !uf.IsValid() {
return true
}
u1 := uf.Bytes()
u2 := v2.FieldByName("XXX_unrecognized").Bytes()
if !bytes.Equal(u1, u2) {
return false
}
return true
}
// v1 and v2 are known to have the same type.
// prop may be nil.
func equalAny(v1, v2 reflect.Value, prop *Properties) bool {
if v1.Type() == protoMessageType {
m1, _ := v1.Interface().(Message)
m2, _ := v2.Interface().(Message)
return Equal(m1, m2)
}
switch v1.Kind() {
case reflect.Bool:
return v1.Bool() == v2.Bool()
case reflect.Float32, reflect.Float64:
return v1.Float() == v2.Float()
case reflect.Int32, reflect.Int64:
return v1.Int() == v2.Int()
case reflect.Interface:
// Probably a oneof field; compare the inner values.
n1, n2 := v1.IsNil(), v2.IsNil()
if n1 || n2 {
return n1 == n2
}
e1, e2 := v1.Elem(), v2.Elem()
if e1.Type() != e2.Type() {
return false
}
return equalAny(e1, e2, nil)
case reflect.Map:
if v1.Len() != v2.Len() {
return false
}
for _, key := range v1.MapKeys() {
val2 := v2.MapIndex(key)
if !val2.IsValid() {
// This key was not found in the second map.
return false
}
if !equalAny(v1.MapIndex(key), val2, nil) {
return false
}
}
return true
case reflect.Ptr:
// Maps may have nil values in them, so check for nil.
if v1.IsNil() && v2.IsNil() {
return true
}
if v1.IsNil() != v2.IsNil() {
return false
}
return equalAny(v1.Elem(), v2.Elem(), prop)
case reflect.Slice:
if v1.Type().Elem().Kind() == reflect.Uint8 {
// short circuit: []byte
// Edge case: if this is in a proto3 message, a zero length
// bytes field is considered the zero value.
if prop != nil && prop.proto3 && v1.Len() == 0 && v2.Len() == 0 {
return true
}
if v1.IsNil() != v2.IsNil() {
return false
}
return bytes.Equal(v1.Interface().([]byte), v2.Interface().([]byte))
}
if v1.Len() != v2.Len() {
return false
}
for i := 0; i < v1.Len(); i++ {
if !equalAny(v1.Index(i), v2.Index(i), prop) {
return false
}
}
return true
case reflect.String:
return v1.Interface().(string) == v2.Interface().(string)
case reflect.Struct:
return equalStruct(v1, v2)
case reflect.Uint32, reflect.Uint64:
return v1.Uint() == v2.Uint()
}
// unknown type, so not a protocol buffer
log.Printf("proto: don't know how to compare %v", v1)
return false
}
// base is the struct type that the extensions are based on.
// x1 and x2 are InternalExtensions.
func equalExtensions(base reflect.Type, x1, x2 XXX_InternalExtensions) bool {
em1, _ := x1.extensionsRead()
em2, _ := x2.extensionsRead()
return equalExtMap(base, em1, em2)
}
func equalExtMap(base reflect.Type, em1, em2 map[int32]Extension) bool {
if len(em1) != len(em2) {
return false
}
for extNum, e1 := range em1 {
e2, ok := em2[extNum]
if !ok {
return false
}
m1, m2 := e1.value, e2.value
if m1 != nil && m2 != nil {
// Both are unencoded.
if !equalAny(reflect.ValueOf(m1), reflect.ValueOf(m2), nil) {
return false
}
continue
}
// At least one is encoded. To do a semantically correct comparison
// we need to unmarshal them first.
var desc *ExtensionDesc
if m := extensionMaps[base]; m != nil {
desc = m[extNum]
}
if desc == nil {
log.Printf("proto: don't know how to compare extension %d of %v", extNum, base)
continue
}
var err error
if m1 == nil {
m1, err = decodeExtension(e1.enc, desc)
}
if m2 == nil && err == nil {
m2, err = decodeExtension(e2.enc, desc)
}
if err != nil {
// The encoded form is invalid.
log.Printf("proto: badly encoded extension %d of %v: %v", extNum, base, err)
return false
}
if !equalAny(reflect.ValueOf(m1), reflect.ValueOf(m2), nil) {
return false
}
}
return true
}

587
vendor/github.com/golang/protobuf/proto/extensions.go generated vendored
View File

@ -1,587 +0,0 @@
// Go support for Protocol Buffers - Google's data interchange format
//
// Copyright 2010 The Go Authors. All rights reserved.
// https://github.com/golang/protobuf
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package proto
/*
* Types and routines for supporting protocol buffer extensions.
*/
import (
"errors"
"fmt"
"reflect"
"strconv"
"sync"
)
// ErrMissingExtension is the error returned by GetExtension if the named extension is not in the message.
var ErrMissingExtension = errors.New("proto: missing extension")
// ExtensionRange represents a range of message extensions for a protocol buffer.
// Used in code generated by the protocol compiler.
type ExtensionRange struct {
Start, End int32 // both inclusive
}
// extendableProto is an interface implemented by any protocol buffer generated by the current
// proto compiler that may be extended.
type extendableProto interface {
Message
ExtensionRangeArray() []ExtensionRange
extensionsWrite() map[int32]Extension
extensionsRead() (map[int32]Extension, sync.Locker)
}
// extendableProtoV1 is an interface implemented by a protocol buffer generated by the previous
// version of the proto compiler that may be extended.
type extendableProtoV1 interface {
Message
ExtensionRangeArray() []ExtensionRange
ExtensionMap() map[int32]Extension
}
// extensionAdapter is a wrapper around extendableProtoV1 that implements extendableProto.
type extensionAdapter struct {
extendableProtoV1
}
func (e extensionAdapter) extensionsWrite() map[int32]Extension {
return e.ExtensionMap()
}
func (e extensionAdapter) extensionsRead() (map[int32]Extension, sync.Locker) {
return e.ExtensionMap(), notLocker{}
}
// notLocker is a sync.Locker whose Lock and Unlock methods are nops.
type notLocker struct{}
func (n notLocker) Lock() {}
func (n notLocker) Unlock() {}
// extendable returns the extendableProto interface for the given generated proto message.
// If the proto message has the old extension format, it returns a wrapper that implements
// the extendableProto interface.
func extendable(p interface{}) (extendableProto, bool) {
if ep, ok := p.(extendableProto); ok {
return ep, ok
}
if ep, ok := p.(extendableProtoV1); ok {
return extensionAdapter{ep}, ok
}
return nil, false
}
// XXX_InternalExtensions is an internal representation of proto extensions.
//
// Each generated message struct type embeds an anonymous XXX_InternalExtensions field,
// thus gaining the unexported 'extensions' method, which can be called only from the proto package.
//
// The methods of XXX_InternalExtensions are not concurrency safe in general,
// but calls to logically read-only methods such as has and get may be executed concurrently.
type XXX_InternalExtensions struct {
// The struct must be indirect so that if a user inadvertently copies a
// generated message and its embedded XXX_InternalExtensions, they
// avoid the mayhem of a copied mutex.
//
// The mutex serializes all logically read-only operations to p.extensionMap.
// It is up to the client to ensure that write operations to p.extensionMap are
// mutually exclusive with other accesses.
p *struct {
mu sync.Mutex
extensionMap map[int32]Extension
}
}
// extensionsWrite returns the extension map, creating it on first use.
func (e *XXX_InternalExtensions) extensionsWrite() map[int32]Extension {
if e.p == nil {
e.p = new(struct {
mu sync.Mutex
extensionMap map[int32]Extension
})
e.p.extensionMap = make(map[int32]Extension)
}
return e.p.extensionMap
}
// extensionsRead returns the extensions map for read-only use. It may be nil.
// The caller must hold the returned mutex's lock when accessing Elements within the map.
func (e *XXX_InternalExtensions) extensionsRead() (map[int32]Extension, sync.Locker) {
if e.p == nil {
return nil, nil
}
return e.p.extensionMap, &e.p.mu
}
var extendableProtoType = reflect.TypeOf((*extendableProto)(nil)).Elem()
var extendableProtoV1Type = reflect.TypeOf((*extendableProtoV1)(nil)).Elem()
// ExtensionDesc represents an extension specification.
// Used in generated code from the protocol compiler.
type ExtensionDesc struct {
ExtendedType Message // nil pointer to the type that is being extended
ExtensionType interface{} // nil pointer to the extension type
Field int32 // field number
Name string // fully-qualified name of extension, for text formatting
Tag string // protobuf tag style
Filename string // name of the file in which the extension is defined
}
func (ed *ExtensionDesc) repeated() bool {
t := reflect.TypeOf(ed.ExtensionType)
return t.Kind() == reflect.Slice && t.Elem().Kind() != reflect.Uint8
}
// Extension represents an extension in a message.
type Extension struct {
// When an extension is stored in a message using SetExtension
// only desc and value are set. When the message is marshaled
// enc will be set to the encoded form of the message.
//
// When a message is unmarshaled and contains extensions, each
// extension will have only enc set. When such an extension is
// accessed using GetExtension (or GetExtensions) desc and value
// will be set.
desc *ExtensionDesc
value interface{}
enc []byte
}
// SetRawExtension is for testing only.
func SetRawExtension(base Message, id int32, b []byte) {
epb, ok := extendable(base)
if !ok {
return
}
extmap := epb.extensionsWrite()
extmap[id] = Extension{enc: b}
}
// isExtensionField returns true iff the given field number is in an extension range.
func isExtensionField(pb extendableProto, field int32) bool {
for _, er := range pb.ExtensionRangeArray() {
if er.Start <= field && field <= er.End {
return true
}
}
return false
}
// checkExtensionTypes checks that the given extension is valid for pb.
func checkExtensionTypes(pb extendableProto, extension *ExtensionDesc) error {
var pbi interface{} = pb
// Check the extended type.
if ea, ok := pbi.(extensionAdapter); ok {
pbi = ea.extendableProtoV1
}
if a, b := reflect.TypeOf(pbi), reflect.TypeOf(extension.ExtendedType); a != b {
return errors.New("proto: bad extended type; " + b.String() + " does not extend " + a.String())
}
// Check the range.
if !isExtensionField(pb, extension.Field) {
return errors.New("proto: bad extension number; not in declared ranges")
}
return nil
}
// extPropKey is sufficient to uniquely identify an extension.
type extPropKey struct {
base reflect.Type
field int32
}
var extProp = struct {
sync.RWMutex
m map[extPropKey]*Properties
}{
m: make(map[extPropKey]*Properties),
}
func extensionProperties(ed *ExtensionDesc) *Properties {
key := extPropKey{base: reflect.TypeOf(ed.ExtendedType), field: ed.Field}
extProp.RLock()
if prop, ok := extProp.m[key]; ok {
extProp.RUnlock()
return prop
}
extProp.RUnlock()
extProp.Lock()
defer extProp.Unlock()
// Check again.
if prop, ok := extProp.m[key]; ok {
return prop
}
prop := new(Properties)
prop.Init(reflect.TypeOf(ed.ExtensionType), "unknown_name", ed.Tag, nil)
extProp.m[key] = prop
return prop
}
// encode encodes any unmarshaled (unencoded) extensions in e.
func encodeExtensions(e *XXX_InternalExtensions) error {
m, mu := e.extensionsRead()
if m == nil {
return nil // fast path
}
mu.Lock()
defer mu.Unlock()
return encodeExtensionsMap(m)
}
// encode encodes any unmarshaled (unencoded) extensions in e.
func encodeExtensionsMap(m map[int32]Extension) error {
for k, e := range m {
if e.value == nil || e.desc == nil {
// Extension is only in its encoded form.
continue
}
// We don't skip extensions that have an encoded form set,
// because the extension value may have been mutated after
// the last time this function was called.
et := reflect.TypeOf(e.desc.ExtensionType)
props := extensionProperties(e.desc)
p := NewBuffer(nil)
// If e.value has type T, the encoder expects a *struct{ X T }.
// Pass a *T with a zero field and hope it all works out.
x := reflect.New(et)
x.Elem().Set(reflect.ValueOf(e.value))
if err := props.enc(p, props, toStructPointer(x)); err != nil {
return err
}
e.enc = p.buf
m[k] = e
}
return nil
}
func extensionsSize(e *XXX_InternalExtensions) (n int) {
m, mu := e.extensionsRead()
if m == nil {
return 0
}
mu.Lock()
defer mu.Unlock()
return extensionsMapSize(m)
}
func extensionsMapSize(m map[int32]Extension) (n int) {
for _, e := range m {
if e.value == nil || e.desc == nil {
// Extension is only in its encoded form.
n += len(e.enc)
continue
}
// We don't skip extensions that have an encoded form set,
// because the extension value may have been mutated after
// the last time this function was called.
et := reflect.TypeOf(e.desc.ExtensionType)
props := extensionProperties(e.desc)
// If e.value has type T, the encoder expects a *struct{ X T }.
// Pass a *T with a zero field and hope it all works out.
x := reflect.New(et)
x.Elem().Set(reflect.ValueOf(e.value))
n += props.size(props, toStructPointer(x))
}
return
}
// HasExtension returns whether the given extension is present in pb.
func HasExtension(pb Message, extension *ExtensionDesc) bool {
// TODO: Check types, field numbers, etc.?
epb, ok := extendable(pb)
if !ok {
return false
}
extmap, mu := epb.extensionsRead()
if extmap == nil {
return false
}
mu.Lock()
_, ok = extmap[extension.Field]
mu.Unlock()
return ok
}
// ClearExtension removes the given extension from pb.
func ClearExtension(pb Message, extension *ExtensionDesc) {
epb, ok := extendable(pb)
if !ok {
return
}
// TODO: Check types, field numbers, etc.?
extmap := epb.extensionsWrite()
delete(extmap, extension.Field)
}
// GetExtension parses and returns the given extension of pb.
// If the extension is not present and has no default value it returns ErrMissingExtension.
func GetExtension(pb Message, extension *ExtensionDesc) (interface{}, error) {
epb, ok := extendable(pb)
if !ok {
return nil, errors.New("proto: not an extendable proto")
}
if err := checkExtensionTypes(epb, extension); err != nil {
return nil, err
}
emap, mu := epb.extensionsRead()
if emap == nil {
return defaultExtensionValue(extension)
}
mu.Lock()
defer mu.Unlock()
e, ok := emap[extension.Field]
if !ok {
// defaultExtensionValue returns the default value or
// ErrMissingExtension if there is no default.
return defaultExtensionValue(extension)
}
if e.value != nil {
// Already decoded. Check the descriptor, though.
if e.desc != extension {
// This shouldn't happen. If it does, it means that
// GetExtension was called twice with two different
// descriptors with the same field number.
return nil, errors.New("proto: descriptor conflict")
}
return e.value, nil
}
v, err := decodeExtension(e.enc, extension)
if err != nil {
return nil, err
}
// Remember the decoded version and drop the encoded version.
// That way it is safe to mutate what we return.
e.value = v
e.desc = extension
e.enc = nil
emap[extension.Field] = e
return e.value, nil
}
// defaultExtensionValue returns the default value for extension.
// If no default for an extension is defined ErrMissingExtension is returned.
func defaultExtensionValue(extension *ExtensionDesc) (interface{}, error) {
t := reflect.TypeOf(extension.ExtensionType)
props := extensionProperties(extension)
sf, _, err := fieldDefault(t, props)
if err != nil {
return nil, err
}
if sf == nil || sf.value == nil {
// There is no default value.
return nil, ErrMissingExtension
}
if t.Kind() != reflect.Ptr {
// We do not need to return a Ptr, we can directly return sf.value.
return sf.value, nil
}
// We need to return an interface{} that is a pointer to sf.value.
value := reflect.New(t).Elem()
value.Set(reflect.New(value.Type().Elem()))
if sf.kind == reflect.Int32 {
// We may have an int32 or an enum, but the underlying data is int32.
// Since we can't set an int32 into a non int32 reflect.value directly
// set it as a int32.
value.Elem().SetInt(int64(sf.value.(int32)))
} else {
value.Elem().Set(reflect.ValueOf(sf.value))
}
return value.Interface(), nil
}
// decodeExtension decodes an extension encoded in b.
func decodeExtension(b []byte, extension *ExtensionDesc) (interface{}, error) {
o := NewBuffer(b)
t := reflect.TypeOf(extension.ExtensionType)
props := extensionProperties(extension)
// t is a pointer to a struct, pointer to basic type or a slice.
// Allocate a "field" to store the pointer/slice itself; the
// pointer/slice will be stored here. We pass
// the address of this field to props.dec.
// This passes a zero field and a *t and lets props.dec
// interpret it as a *struct{ x t }.
value := reflect.New(t).Elem()
for {
// Discard wire type and field number varint. It isn't needed.
if _, err := o.DecodeVarint(); err != nil {
return nil, err
}
if err := props.dec(o, props, toStructPointer(value.Addr())); err != nil {
return nil, err
}
if o.index >= len(o.buf) {
break
}
}
return value.Interface(), nil
}
// GetExtensions returns a slice of the extensions present in pb that are also listed in es.
// The returned slice has the same length as es; missing extensions will appear as nil elements.
func GetExtensions(pb Message, es []*ExtensionDesc) (extensions []interface{}, err error) {
epb, ok := extendable(pb)
if !ok {
return nil, errors.New("proto: not an extendable proto")
}
extensions = make([]interface{}, len(es))
for i, e := range es {
extensions[i], err = GetExtension(epb, e)
if err == ErrMissingExtension {
err = nil
}
if err != nil {
return
}
}
return
}
// ExtensionDescs returns a new slice containing pb's extension descriptors, in undefined order.
// For non-registered extensions, ExtensionDescs returns an incomplete descriptor containing
// just the Field field, which defines the extension's field number.
func ExtensionDescs(pb Message) ([]*ExtensionDesc, error) {
epb, ok := extendable(pb)
if !ok {
return nil, fmt.Errorf("proto: %T is not an extendable proto.Message", pb)
}
registeredExtensions := RegisteredExtensions(pb)
emap, mu := epb.extensionsRead()
if emap == nil {
return nil, nil
}
mu.Lock()
defer mu.Unlock()
extensions := make([]*ExtensionDesc, 0, len(emap))
for extid, e := range emap {
desc := e.desc
if desc == nil {
desc = registeredExtensions[extid]
if desc == nil {
desc = &ExtensionDesc{Field: extid}
}
}
extensions = append(extensions, desc)
}
return extensions, nil
}
// SetExtension sets the specified extension of pb to the specified value.
func SetExtension(pb Message, extension *ExtensionDesc, value interface{}) error {
epb, ok := extendable(pb)
if !ok {
return errors.New("proto: not an extendable proto")
}
if err := checkExtensionTypes(epb, extension); err != nil {
return err
}
typ := reflect.TypeOf(extension.ExtensionType)
if typ != reflect.TypeOf(value) {
return errors.New("proto: bad extension value type")
}
// nil extension values need to be caught early, because the
// encoder can't distinguish an ErrNil due to a nil extension
// from an ErrNil due to a missing field. Extensions are
// always optional, so the encoder would just swallow the error
// and drop all the extensions from the encoded message.
if reflect.ValueOf(value).IsNil() {
return fmt.Errorf("proto: SetExtension called with nil value of type %T", value)
}
extmap := epb.extensionsWrite()
extmap[extension.Field] = Extension{desc: extension, value: value}
return nil
}
// ClearAllExtensions clears all extensions from pb.
func ClearAllExtensions(pb Message) {
epb, ok := extendable(pb)
if !ok {
return
}
m := epb.extensionsWrite()
for k := range m {
delete(m, k)
}
}
// A global registry of extensions.
// The generated code will register the generated descriptors by calling RegisterExtension.
var extensionMaps = make(map[reflect.Type]map[int32]*ExtensionDesc)
// RegisterExtension is called from the generated code.
func RegisterExtension(desc *ExtensionDesc) {
st := reflect.TypeOf(desc.ExtendedType).Elem()
m := extensionMaps[st]
if m == nil {
m = make(map[int32]*ExtensionDesc)
extensionMaps[st] = m
}
if _, ok := m[desc.Field]; ok {
panic("proto: duplicate extension registered: " + st.String() + " " + strconv.Itoa(int(desc.Field)))
}
m[desc.Field] = desc
}
// RegisteredExtensions returns a map of the registered extensions of a
// protocol buffer struct, indexed by the extension number.
// The argument pb should be a nil pointer to the struct type.
func RegisteredExtensions(pb Message) map[int32]*ExtensionDesc {
return extensionMaps[reflect.TypeOf(pb).Elem()]
}

898
vendor/github.com/golang/protobuf/proto/lib.go generated vendored
View File

@ -1,898 +0,0 @@
// Go support for Protocol Buffers - Google's data interchange format
//
// Copyright 2010 The Go Authors. All rights reserved.
// https://github.com/golang/protobuf
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
/*
Package proto converts data structures to and from the wire format of
protocol buffers. It works in concert with the Go source code generated
for .proto files by the protocol compiler.
A summary of the properties of the protocol buffer interface
for a protocol buffer variable v:
- Names are turned from camel_case to CamelCase for export.
- There are no methods on v to set fields; just treat
them as structure fields.
- There are getters that return a field's value if set,
and return the field's default value if unset.
The getters work even if the receiver is a nil message.
- The zero value for a struct is its correct initialization state.
All desired fields must be set before marshaling.
- A Reset() method will restore a protobuf struct to its zero state.
- Non-repeated fields are pointers to the values; nil means unset.
That is, optional or required field int32 f becomes F *int32.
- Repeated fields are slices.
- Helper functions are available to aid the setting of fields.
msg.Foo = proto.String("hello") // set field
- Constants are defined to hold the default values of all fields that
have them. They have the form Default_StructName_FieldName.
Because the getter methods handle defaulted values,
direct use of these constants should be rare.
- Enums are given type names and maps from names to values.
Enum values are prefixed by the enclosing message's name, or by the
enum's type name if it is a top-level enum. Enum types have a String
method, and a Enum method to assist in message construction.
- Nested messages, groups and enums have type names prefixed with the name of
the surrounding message type.
- Extensions are given descriptor names that start with E_,
followed by an underscore-delimited list of the nested messages
that contain it (if any) followed by the CamelCased name of the
extension field itself. HasExtension, ClearExtension, GetExtension
and SetExtension are functions for manipulating extensions.
- Oneof field sets are given a single field in their message,
with distinguished wrapper types for each possible field value.
- Marshal and Unmarshal are functions to encode and decode the wire format.
When the .proto file specifies `syntax="proto3"`, there are some differences:
- Non-repeated fields of non-message type are values instead of pointers.
- Getters are only generated for message and oneof fields.
- Enum types do not get an Enum method.
The simplest way to describe this is to see an example.
Given file test.proto, containing
package example;
enum FOO { X = 17; }
message Test {
required string label = 1;
optional int32 type = 2 [default=77];
repeated int64 reps = 3;
optional group OptionalGroup = 4 {
required string RequiredField = 5;
}
oneof union {
int32 number = 6;
string name = 7;
}
}
The resulting file, test.pb.go, is:
package example
import proto "github.com/golang/protobuf/proto"
import math "math"
type FOO int32
const (
FOO_X FOO = 17
)
var FOO_name = map[int32]string{
17: "X",
}
var FOO_value = map[string]int32{
"X": 17,
}
func (x FOO) Enum() *FOO {
p := new(FOO)
*p = x
return p
}
func (x FOO) String() string {
return proto.EnumName(FOO_name, int32(x))
}
func (x *FOO) UnmarshalJSON(data []byte) error {
value, err := proto.UnmarshalJSONEnum(FOO_value, data)
if err != nil {
return err
}
*x = FOO(value)
return nil
}
type Test struct {
Label *string `protobuf:"bytes,1,req,name=label" json:"label,omitempty"`
Type *int32 `protobuf:"varint,2,opt,name=type,def=77" json:"type,omitempty"`
Reps []int64 `protobuf:"varint,3,rep,name=reps" json:"reps,omitempty"`
Optionalgroup *Test_OptionalGroup `protobuf:"group,4,opt,name=OptionalGroup" json:"optionalgroup,omitempty"`
// Types that are valid to be assigned to Union:
// *Test_Number
// *Test_Name
Union isTest_Union `protobuf_oneof:"union"`
XXX_unrecognized []byte `json:"-"`
}
func (m *Test) Reset() { *m = Test{} }
func (m *Test) String() string { return proto.CompactTextString(m) }
func (*Test) ProtoMessage() {}
type isTest_Union interface {
isTest_Union()
}
type Test_Number struct {
Number int32 `protobuf:"varint,6,opt,name=number"`
}
type Test_Name struct {
Name string `protobuf:"bytes,7,opt,name=name"`
}
func (*Test_Number) isTest_Union() {}
func (*Test_Name) isTest_Union() {}
func (m *Test) GetUnion() isTest_Union {
if m != nil {
return m.Union
}
return nil
}
const Default_Test_Type int32 = 77
func (m *Test) GetLabel() string {
if m != nil && m.Label != nil {
return *m.Label
}
return ""
}
func (m *Test) GetType() int32 {
if m != nil && m.Type != nil {
return *m.Type
}
return Default_Test_Type
}
func (m *Test) GetOptionalgroup() *Test_OptionalGroup {
if m != nil {
return m.Optionalgroup
}
return nil
}
type Test_OptionalGroup struct {
RequiredField *string `protobuf:"bytes,5,req" json:"RequiredField,omitempty"`
}
func (m *Test_OptionalGroup) Reset() { *m = Test_OptionalGroup{} }
func (m *Test_OptionalGroup) String() string { return proto.CompactTextString(m) }
func (m *Test_OptionalGroup) GetRequiredField() string {
if m != nil && m.RequiredField != nil {
return *m.RequiredField
}
return ""
}
func (m *Test) GetNumber() int32 {
if x, ok := m.GetUnion().(*Test_Number); ok {
return x.Number
}
return 0
}
func (m *Test) GetName() string {
if x, ok := m.GetUnion().(*Test_Name); ok {
return x.Name
}
return ""
}
func init() {
proto.RegisterEnum("example.FOO", FOO_name, FOO_value)
}
To create and play with a Test object:
package main
import (
"log"
"github.com/golang/protobuf/proto"
pb "./example.pb"
)
func main() {
test := &pb.Test{
Label: proto.String("hello"),
Type: proto.Int32(17),
Reps: []int64{1, 2, 3},
Optionalgroup: &pb.Test_OptionalGroup{
RequiredField: proto.String("good bye"),
},
Union: &pb.Test_Name{"fred"},
}
data, err := proto.Marshal(test)
if err != nil {
log.Fatal("marshaling error: ", err)
}
newTest := &pb.Test{}
err = proto.Unmarshal(data, newTest)
if err != nil {
log.Fatal("unmarshaling error: ", err)
}
// Now test and newTest contain the same data.
if test.GetLabel() != newTest.GetLabel() {
log.Fatalf("data mismatch %q != %q", test.GetLabel(), newTest.GetLabel())
}
// Use a type switch to determine which oneof was set.
switch u := test.Union.(type) {
case *pb.Test_Number: // u.Number contains the number.
case *pb.Test_Name: // u.Name contains the string.
}
// etc.
}
*/
package proto
import (
"encoding/json"
"fmt"
"log"
"reflect"
"sort"
"strconv"
"sync"
)
// Message is implemented by generated protocol buffer messages.
type Message interface {
Reset()
String() string
ProtoMessage()
}
// Stats records allocation details about the protocol buffer encoders
// and decoders. Useful for tuning the library itself.
type Stats struct {
Emalloc uint64 // mallocs in encode
Dmalloc uint64 // mallocs in decode
Encode uint64 // number of encodes
Decode uint64 // number of decodes
Chit uint64 // number of cache hits
Cmiss uint64 // number of cache misses
Size uint64 // number of sizes
}
// Set to true to enable stats collection.
const collectStats = false
var stats Stats
// GetStats returns a copy of the global Stats structure.
func GetStats() Stats { return stats }
// A Buffer is a buffer manager for marshaling and unmarshaling
// protocol buffers. It may be reused between invocations to
// reduce memory usage. It is not necessary to use a Buffer;
// the global functions Marshal and Unmarshal create a
// temporary Buffer and are fine for most applications.
type Buffer struct {
buf []byte // encode/decode byte stream
index int // read point
// pools of basic types to amortize allocation.
bools []bool
uint32s []uint32
uint64s []uint64
// extra pools, only used with pointer_reflect.go
int32s []int32
int64s []int64
float32s []float32
float64s []float64
}
// NewBuffer allocates a new Buffer and initializes its internal data to
// the contents of the argument slice.
func NewBuffer(e []byte) *Buffer {
return &Buffer{buf: e}
}
// Reset resets the Buffer, ready for marshaling a new protocol buffer.
func (p *Buffer) Reset() {
p.buf = p.buf[0:0] // for reading/writing
p.index = 0 // for reading
}
// SetBuf replaces the internal buffer with the slice,
// ready for unmarshaling the contents of the slice.
func (p *Buffer) SetBuf(s []byte) {
p.buf = s
p.index = 0
}
// Bytes returns the contents of the Buffer.
func (p *Buffer) Bytes() []byte { return p.buf }
/*
* Helper routines for simplifying the creation of optional fields of basic type.
*/
// Bool is a helper routine that allocates a new bool value
// to store v and returns a pointer to it.
func Bool(v bool) *bool {
return &v
}
// Int32 is a helper routine that allocates a new int32 value
// to store v and returns a pointer to it.
func Int32(v int32) *int32 {
return &v
}
// Int is a helper routine that allocates a new int32 value
// to store v and returns a pointer to it, but unlike Int32
// its argument value is an int.
func Int(v int) *int32 {
p := new(int32)
*p = int32(v)
return p
}
// Int64 is a helper routine that allocates a new int64 value
// to store v and returns a pointer to it.
func Int64(v int64) *int64 {
return &v
}
// Float32 is a helper routine that allocates a new float32 value
// to store v and returns a pointer to it.
func Float32(v float32) *float32 {
return &v
}
// Float64 is a helper routine that allocates a new float64 value
// to store v and returns a pointer to it.
func Float64(v float64) *float64 {
return &v
}
// Uint32 is a helper routine that allocates a new uint32 value
// to store v and returns a pointer to it.
func Uint32(v uint32) *uint32 {
return &v
}
// Uint64 is a helper routine that allocates a new uint64 value
// to store v and returns a pointer to it.
func Uint64(v uint64) *uint64 {
return &v
}
// String is a helper routine that allocates a new string value
// to store v and returns a pointer to it.
func String(v string) *string {
return &v
}
// EnumName is a helper function to simplify printing protocol buffer enums
// by name. Given an enum map and a value, it returns a useful string.
func EnumName(m map[int32]string, v int32) string {
s, ok := m[v]
if ok {
return s
}
return strconv.Itoa(int(v))
}
// UnmarshalJSONEnum is a helper function to simplify recovering enum int values
// from their JSON-encoded representation. Given a map from the enum's symbolic
// names to its int values, and a byte buffer containing the JSON-encoded
// value, it returns an int32 that can be cast to the enum type by the caller.
//
// The function can deal with both JSON representations, numeric and symbolic.
func UnmarshalJSONEnum(m map[string]int32, data []byte, enumName string) (int32, error) {
if data[0] == '"' {
// New style: enums are strings.
var repr string
if err := json.Unmarshal(data, &repr); err != nil {
return -1, err
}
val, ok := m[repr]
if !ok {
return 0, fmt.Errorf("unrecognized enum %s value %q", enumName, repr)
}
return val, nil
}
// Old style: enums are ints.
var val int32
if err := json.Unmarshal(data, &val); err != nil {
return 0, fmt.Errorf("cannot unmarshal %#q into enum %s", data, enumName)
}
return val, nil
}
// DebugPrint dumps the encoded data in b in a debugging format with a header
// including the string s. Used in testing but made available for general debugging.
func (p *Buffer) DebugPrint(s string, b []byte) {
var u uint64
obuf := p.buf
index := p.index
p.buf = b
p.index = 0
depth := 0
fmt.Printf("\n--- %s ---\n", s)
out:
for {
for i := 0; i < depth; i++ {
fmt.Print(" ")
}
index := p.index
if index == len(p.buf) {
break
}
op, err := p.DecodeVarint()
if err != nil {
fmt.Printf("%3d: fetching op err %v\n", index, err)
break out
}
tag := op >> 3
wire := op & 7
switch wire {
default:
fmt.Printf("%3d: t=%3d unknown wire=%d\n",
index, tag, wire)
break out
case WireBytes:
var r []byte
r, err = p.DecodeRawBytes(false)
if err != nil {
break out
}
fmt.Printf("%3d: t=%3d bytes [%d]", index, tag, len(r))
if len(r) <= 6 {
for i := 0; i < len(r); i++ {
fmt.Printf(" %.2x", r[i])
}
} else {
for i := 0; i < 3; i++ {
fmt.Printf(" %.2x", r[i])
}
fmt.Printf(" ..")
for i := len(r) - 3; i < len(r); i++ {
fmt.Printf(" %.2x", r[i])
}
}
fmt.Printf("\n")
case WireFixed32:
u, err = p.DecodeFixed32()
if err != nil {
fmt.Printf("%3d: t=%3d fix32 err %v\n", index, tag, err)
break out
}
fmt.Printf("%3d: t=%3d fix32 %d\n", index, tag, u)
case WireFixed64:
u, err = p.DecodeFixed64()
if err != nil {
fmt.Printf("%3d: t=%3d fix64 err %v\n", index, tag, err)
break out
}
fmt.Printf("%3d: t=%3d fix64 %d\n", index, tag, u)
case WireVarint:
u, err = p.DecodeVarint()
if err != nil {
fmt.Printf("%3d: t=%3d varint err %v\n", index, tag, err)
break out
}
fmt.Printf("%3d: t=%3d varint %d\n", index, tag, u)
case WireStartGroup:
fmt.Printf("%3d: t=%3d start\n", index, tag)
depth++
case WireEndGroup:
depth--
fmt.Printf("%3d: t=%3d end\n", index, tag)
}
}
if depth != 0 {
fmt.Printf("%3d: start-end not balanced %d\n", p.index, depth)
}
fmt.Printf("\n")
p.buf = obuf
p.index = index
}
// SetDefaults sets unset protocol buffer fields to their default values.
// It only modifies fields that are both unset and have defined defaults.
// It recursively sets default values in any non-nil sub-messages.
func SetDefaults(pb Message) {
setDefaults(reflect.ValueOf(pb), true, false)
}
// v is a pointer to a struct.
func setDefaults(v reflect.Value, recur, zeros bool) {
v = v.Elem()
defaultMu.RLock()
dm, ok := defaults[v.Type()]
defaultMu.RUnlock()
if !ok {
dm = buildDefaultMessage(v.Type())
defaultMu.Lock()
defaults[v.Type()] = dm
defaultMu.Unlock()
}
for _, sf := range dm.scalars {
f := v.Field(sf.index)
if !f.IsNil() {
// field already set
continue
}
dv := sf.value
if dv == nil && !zeros {
// no explicit default, and don't want to set zeros
continue
}
fptr := f.Addr().Interface() // **T
// TODO: Consider batching the allocations we do here.
switch sf.kind {
case reflect.Bool:
b := new(bool)
if dv != nil {
*b = dv.(bool)
}
*(fptr.(**bool)) = b
case reflect.Float32:
f := new(float32)
if dv != nil {
*f = dv.(float32)
}
*(fptr.(**float32)) = f
case reflect.Float64:
f := new(float64)
if dv != nil {
*f = dv.(float64)
}
*(fptr.(**float64)) = f
case reflect.Int32:
// might be an enum
if ft := f.Type(); ft != int32PtrType {
// enum
f.Set(reflect.New(ft.Elem()))
if dv != nil {
f.Elem().SetInt(int64(dv.(int32)))
}
} else {
// int32 field
i := new(int32)
if dv != nil {
*i = dv.(int32)
}
*(fptr.(**int32)) = i
}
case reflect.Int64:
i := new(int64)
if dv != nil {
*i = dv.(int64)
}
*(fptr.(**int64)) = i
case reflect.String:
s := new(string)
if dv != nil {
*s = dv.(string)
}
*(fptr.(**string)) = s
case reflect.Uint8:
// exceptional case: []byte
var b []byte
if dv != nil {
db := dv.([]byte)
b = make([]byte, len(db))
copy(b, db)
} else {
b = []byte{}
}
*(fptr.(*[]byte)) = b
case reflect.Uint32:
u := new(uint32)
if dv != nil {
*u = dv.(uint32)
}
*(fptr.(**uint32)) = u
case reflect.Uint64:
u := new(uint64)
if dv != nil {
*u = dv.(uint64)
}
*(fptr.(**uint64)) = u
default:
log.Printf("proto: can't set default for field %v (sf.kind=%v)", f, sf.kind)
}
}
for _, ni := range dm.nested {
f := v.Field(ni)
// f is *T or []*T or map[T]*T
switch f.Kind() {
case reflect.Ptr:
if f.IsNil() {
continue
}
setDefaults(f, recur, zeros)
case reflect.Slice:
for i := 0; i < f.Len(); i++ {
e := f.Index(i)
if e.IsNil() {
continue
}
setDefaults(e, recur, zeros)
}
case reflect.Map:
for _, k := range f.MapKeys() {
e := f.MapIndex(k)
if e.IsNil() {
continue
}
setDefaults(e, recur, zeros)
}
}
}
}
var (
// defaults maps a protocol buffer struct type to a slice of the fields,
// with its scalar fields set to their proto-declared non-zero default values.
defaultMu sync.RWMutex
defaults = make(map[reflect.Type]defaultMessage)
int32PtrType = reflect.TypeOf((*int32)(nil))
)
// defaultMessage represents information about the default values of a message.
type defaultMessage struct {
scalars []scalarField
nested []int // struct field index of nested messages
}
type scalarField struct {
index int // struct field index
kind reflect.Kind // element type (the T in *T or []T)
value interface{} // the proto-declared default value, or nil
}
// t is a struct type.
func buildDefaultMessage(t reflect.Type) (dm defaultMessage) {
sprop := GetProperties(t)
for _, prop := range sprop.Prop {
fi, ok := sprop.decoderTags.get(prop.Tag)
if !ok {
// XXX_unrecognized
continue
}
ft := t.Field(fi).Type
sf, nested, err := fieldDefault(ft, prop)
switch {
case err != nil:
log.Print(err)
case nested:
dm.nested = append(dm.nested, fi)
case sf != nil:
sf.index = fi
dm.scalars = append(dm.scalars, *sf)
}
}
return dm
}
// fieldDefault returns the scalarField for field type ft.
// sf will be nil if the field can not have a default.
// nestedMessage will be true if this is a nested message.
// Note that sf.index is not set on return.
func fieldDefault(ft reflect.Type, prop *Properties) (sf *scalarField, nestedMessage bool, err error) {
var canHaveDefault bool
switch ft.Kind() {
case reflect.Ptr:
if ft.Elem().Kind() == reflect.Struct {
nestedMessage = true
} else {
canHaveDefault = true // proto2 scalar field
}
case reflect.Slice:
switch ft.Elem().Kind() {
case reflect.Ptr:
nestedMessage = true // repeated message
case reflect.Uint8:
canHaveDefault = true // bytes field
}
case reflect.Map:
if ft.Elem().Kind() == reflect.Ptr {
nestedMessage = true // map with message values
}
}
if !canHaveDefault {
if nestedMessage {
return nil, true, nil
}
return nil, false, nil
}
// We now know that ft is a pointer or slice.
sf = &scalarField{kind: ft.Elem().Kind()}
// scalar fields without defaults
if !prop.HasDefault {
return sf, false, nil
}
// a scalar field: either *T or []byte
switch ft.Elem().Kind() {
case reflect.Bool:
x, err := strconv.ParseBool(prop.Default)
if err != nil {
return nil, false, fmt.Errorf("proto: bad default bool %q: %v", prop.Default, err)
}
sf.value = x
case reflect.Float32:
x, err := strconv.ParseFloat(prop.Default, 32)
if err != nil {
return nil, false, fmt.Errorf("proto: bad default float32 %q: %v", prop.Default, err)
}
sf.value = float32(x)
case reflect.Float64:
x, err := strconv.ParseFloat(prop.Default, 64)
if err != nil {
return nil, false, fmt.Errorf("proto: bad default float64 %q: %v", prop.Default, err)
}
sf.value = x
case reflect.Int32:
x, err := strconv.ParseInt(prop.Default, 10, 32)
if err != nil {
return nil, false, fmt.Errorf("proto: bad default int32 %q: %v", prop.Default, err)
}
sf.value = int32(x)
case reflect.Int64:
x, err := strconv.ParseInt(prop.Default, 10, 64)
if err != nil {
return nil, false, fmt.Errorf("proto: bad default int64 %q: %v", prop.Default, err)
}
sf.value = x
case reflect.String:
sf.value = prop.Default
case reflect.Uint8:
// []byte (not *uint8)
sf.value = []byte(prop.Default)
case reflect.Uint32:
x, err := strconv.ParseUint(prop.Default, 10, 32)
if err != nil {
return nil, false, fmt.Errorf("proto: bad default uint32 %q: %v", prop.Default, err)
}
sf.value = uint32(x)
case reflect.Uint64:
x, err := strconv.ParseUint(prop.Default, 10, 64)
if err != nil {
return nil, false, fmt.Errorf("proto: bad default uint64 %q: %v", prop.Default, err)
}
sf.value = x
default:
return nil, false, fmt.Errorf("proto: unhandled def kind %v", ft.Elem().Kind())
}
return sf, false, nil
}
// Map fields may have key types of non-float scalars, strings and enums.
// The easiest way to sort them in some deterministic order is to use fmt.
// If this turns out to be inefficient we can always consider other options,
// such as doing a Schwartzian transform.
func mapKeys(vs []reflect.Value) sort.Interface {
s := mapKeySorter{
vs: vs,
// default Less function: textual comparison
less: func(a, b reflect.Value) bool {
return fmt.Sprint(a.Interface()) < fmt.Sprint(b.Interface())
},
}
// Type specialization per https://developers.google.com/protocol-buffers/docs/proto#maps;
// numeric keys are sorted numerically.
if len(vs) == 0 {
return s
}
switch vs[0].Kind() {
case reflect.Int32, reflect.Int64:
s.less = func(a, b reflect.Value) bool { return a.Int() < b.Int() }
case reflect.Uint32, reflect.Uint64:
s.less = func(a, b reflect.Value) bool { return a.Uint() < b.Uint() }
}
return s
}
type mapKeySorter struct {
vs []reflect.Value
less func(a, b reflect.Value) bool
}
func (s mapKeySorter) Len() int { return len(s.vs) }
func (s mapKeySorter) Swap(i, j int) { s.vs[i], s.vs[j] = s.vs[j], s.vs[i] }
func (s mapKeySorter) Less(i, j int) bool {
return s.less(s.vs[i], s.vs[j])
}
// isProto3Zero reports whether v is a zero proto3 value.
func isProto3Zero(v reflect.Value) bool {
switch v.Kind() {
case reflect.Bool:
return !v.Bool()
case reflect.Int32, reflect.Int64:
return v.Int() == 0
case reflect.Uint32, reflect.Uint64:
return v.Uint() == 0
case reflect.Float32, reflect.Float64:
return v.Float() == 0
case reflect.String:
return v.String() == ""
}
return false
}
// ProtoPackageIsVersion2 is referenced from generated protocol buffer files
// to assert that that code is compatible with this version of the proto package.
const ProtoPackageIsVersion2 = true
// ProtoPackageIsVersion1 is referenced from generated protocol buffer files
// to assert that that code is compatible with this version of the proto package.
const ProtoPackageIsVersion1 = true

311
vendor/github.com/golang/protobuf/proto/message_set.go generated vendored
View File

@ -1,311 +0,0 @@
// Go support for Protocol Buffers - Google's data interchange format
//
// Copyright 2010 The Go Authors. All rights reserved.
// https://github.com/golang/protobuf
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package proto
/*
* Support for message sets.
*/
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"reflect"
"sort"
)
// errNoMessageTypeID occurs when a protocol buffer does not have a message type ID.
// A message type ID is required for storing a protocol buffer in a message set.
var errNoMessageTypeID = errors.New("proto does not have a message type ID")
// The first two types (_MessageSet_Item and messageSet)
// model what the protocol compiler produces for the following protocol message:
// message MessageSet {
// repeated group Item = 1 {
// required int32 type_id = 2;
// required string message = 3;
// };
// }
// That is the MessageSet wire format. We can't use a proto to generate these
// because that would introduce a circular dependency between it and this package.
type _MessageSet_Item struct {
TypeId *int32 `protobuf:"varint,2,req,name=type_id"`
Message []byte `protobuf:"bytes,3,req,name=message"`
}
type messageSet struct {
Item []*_MessageSet_Item `protobuf:"group,1,rep"`
XXX_unrecognized []byte
// TODO: caching?
}
// Make sure messageSet is a Message.
var _ Message = (*messageSet)(nil)
// messageTypeIder is an interface satisfied by a protocol buffer type
// that may be stored in a MessageSet.
type messageTypeIder interface {
MessageTypeId() int32
}
func (ms *messageSet) find(pb Message) *_MessageSet_Item {
mti, ok := pb.(messageTypeIder)
if !ok {
return nil
}
id := mti.MessageTypeId()
for _, item := range ms.Item {
if *item.TypeId == id {
return item
}
}
return nil
}
func (ms *messageSet) Has(pb Message) bool {
if ms.find(pb) != nil {
return true
}
return false
}
func (ms *messageSet) Unmarshal(pb Message) error {
if item := ms.find(pb); item != nil {
return Unmarshal(item.Message, pb)
}
if _, ok := pb.(messageTypeIder); !ok {
return errNoMessageTypeID
}
return nil // TODO: return error instead?
}
func (ms *messageSet) Marshal(pb Message) error {
msg, err := Marshal(pb)
if err != nil {
return err
}
if item := ms.find(pb); item != nil {
// reuse existing item
item.Message = msg
return nil
}
mti, ok := pb.(messageTypeIder)
if !ok {
return errNoMessageTypeID
}
mtid := mti.MessageTypeId()
ms.Item = append(ms.Item, &_MessageSet_Item{
TypeId: &mtid,
Message: msg,
})
return nil
}
func (ms *messageSet) Reset() { *ms = messageSet{} }
func (ms *messageSet) String() string { return CompactTextString(ms) }
func (*messageSet) ProtoMessage() {}
// Support for the message_set_wire_format message option.
func skipVarint(buf []byte) []byte {
i := 0
for ; buf[i]&0x80 != 0; i++ {
}
return buf[i+1:]
}
// MarshalMessageSet encodes the extension map represented by m in the message set wire format.
// It is called by generated Marshal methods on protocol buffer messages with the message_set_wire_format option.
func MarshalMessageSet(exts interface{}) ([]byte, error) {
var m map[int32]Extension
switch exts := exts.(type) {
case *XXX_InternalExtensions:
if err := encodeExtensions(exts); err != nil {
return nil, err
}
m, _ = exts.extensionsRead()
case map[int32]Extension:
if err := encodeExtensionsMap(exts); err != nil {
return nil, err
}
m = exts
default:
return nil, errors.New("proto: not an extension map")
}
// Sort extension IDs to provide a deterministic encoding.
// See also enc_map in encode.go.
ids := make([]int, 0, len(m))
for id := range m {
ids = append(ids, int(id))
}
sort.Ints(ids)
ms := &messageSet{Item: make([]*_MessageSet_Item, 0, len(m))}
for _, id := range ids {
e := m[int32(id)]
// Remove the wire type and field number varint, as well as the length varint.
msg := skipVarint(skipVarint(e.enc))
ms.Item = append(ms.Item, &_MessageSet_Item{
TypeId: Int32(int32(id)),
Message: msg,
})
}
return Marshal(ms)
}
// UnmarshalMessageSet decodes the extension map encoded in buf in the message set wire format.
// It is called by generated Unmarshal methods on protocol buffer messages with the message_set_wire_format option.
func UnmarshalMessageSet(buf []byte, exts interface{}) error {
var m map[int32]Extension
switch exts := exts.(type) {
case *XXX_InternalExtensions:
m = exts.extensionsWrite()
case map[int32]Extension:
m = exts
default:
return errors.New("proto: not an extension map")
}
ms := new(messageSet)
if err := Unmarshal(buf, ms); err != nil {
return err
}
for _, item := range ms.Item {
id := *item.TypeId
msg := item.Message
// Restore wire type and field number varint, plus length varint.
// Be careful to preserve duplicate items.
b := EncodeVarint(uint64(id)<<3 | WireBytes)
if ext, ok := m[id]; ok {
// Existing data; rip off the tag and length varint
// so we join the new data correctly.
// We can assume that ext.enc is set because we are unmarshaling.
o := ext.enc[len(b):] // skip wire type and field number
_, n := DecodeVarint(o) // calculate length of length varint
o = o[n:] // skip length varint
msg = append(o, msg...) // join old data and new data
}
b = append(b, EncodeVarint(uint64(len(msg)))...)
b = append(b, msg...)
m[id] = Extension{enc: b}
}
return nil
}
// MarshalMessageSetJSON encodes the extension map represented by m in JSON format.
// It is called by generated MarshalJSON methods on protocol buffer messages with the message_set_wire_format option.
func MarshalMessageSetJSON(exts interface{}) ([]byte, error) {
var m map[int32]Extension
switch exts := exts.(type) {
case *XXX_InternalExtensions:
m, _ = exts.extensionsRead()
case map[int32]Extension:
m = exts
default:
return nil, errors.New("proto: not an extension map")
}
var b bytes.Buffer
b.WriteByte('{')
// Process the map in key order for deterministic output.
ids := make([]int32, 0, len(m))
for id := range m {
ids = append(ids, id)
}
sort.Sort(int32Slice(ids)) // int32Slice defined in text.go
for i, id := range ids {
ext := m[id]
if i > 0 {
b.WriteByte(',')
}
msd, ok := messageSetMap[id]
if !ok {
// Unknown type; we can't render it, so skip it.
continue
}
fmt.Fprintf(&b, `"[%s]":`, msd.name)
x := ext.value
if x == nil {
x = reflect.New(msd.t.Elem()).Interface()
if err := Unmarshal(ext.enc, x.(Message)); err != nil {
return nil, err
}
}
d, err := json.Marshal(x)
if err != nil {
return nil, err
}
b.Write(d)
}
b.WriteByte('}')
return b.Bytes(), nil
}
// UnmarshalMessageSetJSON decodes the extension map encoded in buf in JSON format.
// It is called by generated UnmarshalJSON methods on protocol buffer messages with the message_set_wire_format option.
func UnmarshalMessageSetJSON(buf []byte, exts interface{}) error {
// Common-case fast path.
if len(buf) == 0 || bytes.Equal(buf, []byte("{}")) {
return nil
}
// This is fairly tricky, and it's not clear that it is needed.
return errors.New("TODO: UnmarshalMessageSetJSON not yet implemented")
}
// A global registry of types that can be used in a MessageSet.
var messageSetMap = make(map[int32]messageSetDesc)
type messageSetDesc struct {
t reflect.Type // pointer to struct
name string
}
// RegisterMessageSetType is called from the generated code.
func RegisterMessageSetType(m Message, fieldNum int32, name string) {
messageSetMap[fieldNum] = messageSetDesc{
t: reflect.TypeOf(m),
name: name,
}
}

484
vendor/github.com/golang/protobuf/proto/pointer_reflect.go generated vendored
View File

@ -1,484 +0,0 @@
// Go support for Protocol Buffers - Google's data interchange format
//
// Copyright 2012 The Go Authors. All rights reserved.
// https://github.com/golang/protobuf
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// +build appengine js
// This file contains an implementation of proto field accesses using package reflect.
// It is slower than the code in pointer_unsafe.go but it avoids package unsafe and can
// be used on App Engine.
package proto
import (
"math"
"reflect"
)
// A structPointer is a pointer to a struct.
type structPointer struct {
v reflect.Value
}
// toStructPointer returns a structPointer equivalent to the given reflect value.
// The reflect value must itself be a pointer to a struct.
func toStructPointer(v reflect.Value) structPointer {
return structPointer{v}
}
// IsNil reports whether p is nil.
func structPointer_IsNil(p structPointer) bool {
return p.v.IsNil()
}
// Interface returns the struct pointer as an interface value.
func structPointer_Interface(p structPointer, _ reflect.Type) interface{} {
return p.v.Interface()
}
// A field identifies a field in a struct, accessible from a structPointer.
// In this implementation, a field is identified by the sequence of field indices
// passed to reflect's FieldByIndex.
type field []int
// toField returns a field equivalent to the given reflect field.
func toField(f *reflect.StructField) field {
return f.Index
}
// invalidField is an invalid field identifier.
var invalidField = field(nil)
// IsValid reports whether the field identifier is valid.
func (f field) IsValid() bool { return f != nil }
// field returns the given field in the struct as a reflect value.
func structPointer_field(p structPointer, f field) reflect.Value {
// Special case: an extension map entry with a value of type T
// passes a *T to the struct-handling code with a zero field,
// expecting that it will be treated as equivalent to *struct{ X T },
// which has the same memory layout. We have to handle that case
// specially, because reflect will panic if we call FieldByIndex on a
// non-struct.
if f == nil {
return p.v.Elem()
}
return p.v.Elem().FieldByIndex(f)
}
// ifield returns the given field in the struct as an interface value.
func structPointer_ifield(p structPointer, f field) interface{} {
return structPointer_field(p, f).Addr().Interface()
}
// Bytes returns the address of a []byte field in the struct.
func structPointer_Bytes(p structPointer, f field) *[]byte {
return structPointer_ifield(p, f).(*[]byte)
}
// BytesSlice returns the address of a [][]byte field in the struct.
func structPointer_BytesSlice(p structPointer, f field) *[][]byte {
return structPointer_ifield(p, f).(*[][]byte)
}
// Bool returns the address of a *bool field in the struct.
func structPointer_Bool(p structPointer, f field) **bool {
return structPointer_ifield(p, f).(**bool)
}
// BoolVal returns the address of a bool field in the struct.
func structPointer_BoolVal(p structPointer, f field) *bool {
return structPointer_ifield(p, f).(*bool)
}
// BoolSlice returns the address of a []bool field in the struct.
func structPointer_BoolSlice(p structPointer, f field) *[]bool {
return structPointer_ifield(p, f).(*[]bool)
}
// String returns the address of a *string field in the struct.
func structPointer_String(p structPointer, f field) **string {
return structPointer_ifield(p, f).(**string)
}
// StringVal returns the address of a string field in the struct.
func structPointer_StringVal(p structPointer, f field) *string {
return structPointer_ifield(p, f).(*string)
}
// StringSlice returns the address of a []string field in the struct.
func structPointer_StringSlice(p structPointer, f field) *[]string {
return structPointer_ifield(p, f).(*[]string)
}
// Extensions returns the address of an extension map field in the struct.
func structPointer_Extensions(p structPointer, f field) *XXX_InternalExtensions {
return structPointer_ifield(p, f).(*XXX_InternalExtensions)
}
// ExtMap returns the address of an extension map field in the struct.
func structPointer_ExtMap(p structPointer, f field) *map[int32]Extension {
return structPointer_ifield(p, f).(*map[int32]Extension)
}
// NewAt returns the reflect.Value for a pointer to a field in the struct.
func structPointer_NewAt(p structPointer, f field, typ reflect.Type) reflect.Value {
return structPointer_field(p, f).Addr()
}
// SetStructPointer writes a *struct field in the struct.
func structPointer_SetStructPointer(p structPointer, f field, q structPointer) {
structPointer_field(p, f).Set(q.v)
}
// GetStructPointer reads a *struct field in the struct.
func structPointer_GetStructPointer(p structPointer, f field) structPointer {
return structPointer{structPointer_field(p, f)}
}
// StructPointerSlice the address of a []*struct field in the struct.
func structPointer_StructPointerSlice(p structPointer, f field) structPointerSlice {
return structPointerSlice{structPointer_field(p, f)}
}
// A structPointerSlice represents the address of a slice of pointers to structs
// (themselves messages or groups). That is, v.Type() is *[]*struct{...}.
type structPointerSlice struct {
v reflect.Value
}
func (p structPointerSlice) Len() int { return p.v.Len() }
func (p structPointerSlice) Index(i int) structPointer { return structPointer{p.v.Index(i)} }
func (p structPointerSlice) Append(q structPointer) {
p.v.Set(reflect.Append(p.v, q.v))
}
var (
int32Type = reflect.TypeOf(int32(0))
uint32Type = reflect.TypeOf(uint32(0))
float32Type = reflect.TypeOf(float32(0))
int64Type = reflect.TypeOf(int64(0))
uint64Type = reflect.TypeOf(uint64(0))
float64Type = reflect.TypeOf(float64(0))
)
// A word32 represents a field of type *int32, *uint32, *float32, or *enum.
// That is, v.Type() is *int32, *uint32, *float32, or *enum and v is assignable.
type word32 struct {
v reflect.Value
}
// IsNil reports whether p is nil.
func word32_IsNil(p word32) bool {
return p.v.IsNil()
}
// Set sets p to point at a newly allocated word with bits set to x.
func word32_Set(p word32, o *Buffer, x uint32) {
t := p.v.Type().Elem()
switch t {
case int32Type:
if len(o.int32s) == 0 {
o.int32s = make([]int32, uint32PoolSize)
}
o.int32s[0] = int32(x)
p.v.Set(reflect.ValueOf(&o.int32s[0]))
o.int32s = o.int32s[1:]
return
case uint32Type:
if len(o.uint32s) == 0 {
o.uint32s = make([]uint32, uint32PoolSize)
}
o.uint32s[0] = x
p.v.Set(reflect.ValueOf(&o.uint32s[0]))
o.uint32s = o.uint32s[1:]
return
case float32Type:
if len(o.float32s) == 0 {
o.float32s = make([]float32, uint32PoolSize)
}
o.float32s[0] = math.Float32frombits(x)
p.v.Set(reflect.ValueOf(&o.float32s[0]))
o.float32s = o.float32s[1:]
return
}
// must be enum
p.v.Set(reflect.New(t))
p.v.Elem().SetInt(int64(int32(x)))
}
// Get gets the bits pointed at by p, as a uint32.
func word32_Get(p word32) uint32 {
elem := p.v.Elem()
switch elem.Kind() {
case reflect.Int32:
return uint32(elem.Int())
case reflect.Uint32:
return uint32(elem.Uint())
case reflect.Float32:
return math.Float32bits(float32(elem.Float()))
}
panic("unreachable")
}
// Word32 returns a reference to a *int32, *uint32, *float32, or *enum field in the struct.
func structPointer_Word32(p structPointer, f field) word32 {
return word32{structPointer_field(p, f)}
}
// A word32Val represents a field of type int32, uint32, float32, or enum.
// That is, v.Type() is int32, uint32, float32, or enum and v is assignable.
type word32Val struct {
v reflect.Value
}
// Set sets *p to x.
func word32Val_Set(p word32Val, x uint32) {
switch p.v.Type() {
case int32Type:
p.v.SetInt(int64(x))
return
case uint32Type:
p.v.SetUint(uint64(x))
return
case float32Type:
p.v.SetFloat(float64(math.Float32frombits(x)))
return
}
// must be enum
p.v.SetInt(int64(int32(x)))
}
// Get gets the bits pointed at by p, as a uint32.
func word32Val_Get(p word32Val) uint32 {
elem := p.v
switch elem.Kind() {
case reflect.Int32:
return uint32(elem.Int())
case reflect.Uint32:
return uint32(elem.Uint())
case reflect.Float32:
return math.Float32bits(float32(elem.Float()))
}
panic("unreachable")
}
// Word32Val returns a reference to a int32, uint32, float32, or enum field in the struct.
func structPointer_Word32Val(p structPointer, f field) word32Val {
return word32Val{structPointer_field(p, f)}
}
// A word32Slice is a slice of 32-bit values.
// That is, v.Type() is []int32, []uint32, []float32, or []enum.
type word32Slice struct {
v reflect.Value
}
func (p word32Slice) Append(x uint32) {
n, m := p.v.Len(), p.v.Cap()
if n < m {
p.v.SetLen(n + 1)
} else {
t := p.v.Type().Elem()
p.v.Set(reflect.Append(p.v, reflect.Zero(t)))
}
elem := p.v.Index(n)
switch elem.Kind() {
case reflect.Int32:
elem.SetInt(int64(int32(x)))
case reflect.Uint32:
elem.SetUint(uint64(x))
case reflect.Float32:
elem.SetFloat(float64(math.Float32frombits(x)))
}
}
func (p word32Slice) Len() int {
return p.v.Len()
}
func (p word32Slice) Index(i int) uint32 {
elem := p.v.Index(i)
switch elem.Kind() {
case reflect.Int32:
return uint32(elem.Int())
case reflect.Uint32:
return uint32(elem.Uint())
case reflect.Float32:
return math.Float32bits(float32(elem.Float()))
}
panic("unreachable")
}
// Word32Slice returns a reference to a []int32, []uint32, []float32, or []enum field in the struct.
func structPointer_Word32Slice(p structPointer, f field) word32Slice {
return word32Slice{structPointer_field(p, f)}
}
// word64 is like word32 but for 64-bit values.
type word64 struct {
v reflect.Value
}
func word64_Set(p word64, o *Buffer, x uint64) {
t := p.v.Type().Elem()
switch t {
case int64Type:
if len(o.int64s) == 0 {
o.int64s = make([]int64, uint64PoolSize)
}
o.int64s[0] = int64(x)
p.v.Set(reflect.ValueOf(&o.int64s[0]))
o.int64s = o.int64s[1:]
return
case uint64Type:
if len(o.uint64s) == 0 {
o.uint64s = make([]uint64, uint64PoolSize)
}
o.uint64s[0] = x
p.v.Set(reflect.ValueOf(&o.uint64s[0]))
o.uint64s = o.uint64s[1:]
return
case float64Type:
if len(o.float64s) == 0 {
o.float64s = make([]float64, uint64PoolSize)
}
o.float64s[0] = math.Float64frombits(x)
p.v.Set(reflect.ValueOf(&o.float64s[0]))
o.float64s = o.float64s[1:]
return
}
panic("unreachable")
}
func word64_IsNil(p word64) bool {
return p.v.IsNil()
}
func word64_Get(p word64) uint64 {
elem := p.v.Elem()
switch elem.Kind() {
case reflect.Int64:
return uint64(elem.Int())
case reflect.Uint64:
return elem.Uint()
case reflect.Float64:
return math.Float64bits(elem.Float())
}
panic("unreachable")
}
func structPointer_Word64(p structPointer, f field) word64 {
return word64{structPointer_field(p, f)}
}
// word64Val is like word32Val but for 64-bit values.
type word64Val struct {
v reflect.Value
}
func word64Val_Set(p word64Val, o *Buffer, x uint64) {
switch p.v.Type() {
case int64Type:
p.v.SetInt(int64(x))
return
case uint64Type:
p.v.SetUint(x)
return
case float64Type:
p.v.SetFloat(math.Float64frombits(x))
return
}
panic("unreachable")
}
func word64Val_Get(p word64Val) uint64 {
elem := p.v
switch elem.Kind() {
case reflect.Int64:
return uint64(elem.Int())
case reflect.Uint64:
return elem.Uint()
case reflect.Float64:
return math.Float64bits(elem.Float())
}
panic("unreachable")
}
func structPointer_Word64Val(p structPointer, f field) word64Val {
return word64Val{structPointer_field(p, f)}
}
type word64Slice struct {
v reflect.Value
}
func (p word64Slice) Append(x uint64) {
n, m := p.v.Len(), p.v.Cap()
if n < m {
p.v.SetLen(n + 1)
} else {
t := p.v.Type().Elem()
p.v.Set(reflect.Append(p.v, reflect.Zero(t)))
}
elem := p.v.Index(n)
switch elem.Kind() {
case reflect.Int64:
elem.SetInt(int64(int64(x)))
case reflect.Uint64:
elem.SetUint(uint64(x))
case reflect.Float64:
elem.SetFloat(float64(math.Float64frombits(x)))
}
}
func (p word64Slice) Len() int {
return p.v.Len()
}
func (p word64Slice) Index(i int) uint64 {
elem := p.v.Index(i)
switch elem.Kind() {
case reflect.Int64:
return uint64(elem.Int())
case reflect.Uint64:
return uint64(elem.Uint())
case reflect.Float64:
return math.Float64bits(float64(elem.Float()))
}
panic("unreachable")
}
func structPointer_Word64Slice(p structPointer, f field) word64Slice {
return word64Slice{structPointer_field(p, f)}
}

270
vendor/github.com/golang/protobuf/proto/pointer_unsafe.go generated vendored
View File

@ -1,270 +0,0 @@
// Go support for Protocol Buffers - Google's data interchange format
//
// Copyright 2012 The Go Authors. All rights reserved.
// https://github.com/golang/protobuf
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// +build !appengine,!js
// This file contains the implementation of the proto field accesses using package unsafe.
package proto
import (
"reflect"
"unsafe"
)
// NOTE: These type_Foo functions would more idiomatically be methods,
// but Go does not allow methods on pointer types, and we must preserve
// some pointer type for the garbage collector. We use these
// funcs with clunky names as our poor approximation to methods.
//
// An alternative would be
// type structPointer struct { p unsafe.Pointer }
// but that does not registerize as well.
// A structPointer is a pointer to a struct.
type structPointer unsafe.Pointer
// toStructPointer returns a structPointer equivalent to the given reflect value.
func toStructPointer(v reflect.Value) structPointer {
return structPointer(unsafe.Pointer(v.Pointer()))
}
// IsNil reports whether p is nil.
func structPointer_IsNil(p structPointer) bool {
return p == nil
}
// Interface returns the struct pointer, assumed to have element type t,
// as an interface value.
func structPointer_Interface(p structPointer, t reflect.Type) interface{} {
return reflect.NewAt(t, unsafe.Pointer(p)).Interface()
}
// A field identifies a field in a struct, accessible from a structPointer.
// In this implementation, a field is identified by its byte offset from the start of the struct.
type field uintptr
// toField returns a field equivalent to the given reflect field.
func toField(f *reflect.StructField) field {
return field(f.Offset)
}
// invalidField is an invalid field identifier.
const invalidField = ^field(0)
// IsValid reports whether the field identifier is valid.
func (f field) IsValid() bool {
return f != ^field(0)
}
// Bytes returns the address of a []byte field in the struct.
func structPointer_Bytes(p structPointer, f field) *[]byte {
return (*[]byte)(unsafe.Pointer(uintptr(p) + uintptr(f)))
}
// BytesSlice returns the address of a [][]byte field in the struct.
func structPointer_BytesSlice(p structPointer, f field) *[][]byte {
return (*[][]byte)(unsafe.Pointer(uintptr(p) + uintptr(f)))
}
// Bool returns the address of a *bool field in the struct.
func structPointer_Bool(p structPointer, f field) **bool {
return (**bool)(unsafe.Pointer(uintptr(p) + uintptr(f)))
}
// BoolVal returns the address of a bool field in the struct.
func structPointer_BoolVal(p structPointer, f field) *bool {
return (*bool)(unsafe.Pointer(uintptr(p) + uintptr(f)))
}
// BoolSlice returns the address of a []bool field in the struct.
func structPointer_BoolSlice(p structPointer, f field) *[]bool {
return (*[]bool)(unsafe.Pointer(uintptr(p) + uintptr(f)))
}
// String returns the address of a *string field in the struct.
func structPointer_String(p structPointer, f field) **string {
return (**string)(unsafe.Pointer(uintptr(p) + uintptr(f)))
}
// StringVal returns the address of a string field in the struct.
func structPointer_StringVal(p structPointer, f field) *string {
return (*string)(unsafe.Pointer(uintptr(p) + uintptr(f)))
}
// StringSlice returns the address of a []string field in the struct.
func structPointer_StringSlice(p structPointer, f field) *[]string {
return (*[]string)(unsafe.Pointer(uintptr(p) + uintptr(f)))
}
// ExtMap returns the address of an extension map field in the struct.
func structPointer_Extensions(p structPointer, f field) *XXX_InternalExtensions {
return (*XXX_InternalExtensions)(unsafe.Pointer(uintptr(p) + uintptr(f)))
}
func structPointer_ExtMap(p structPointer, f field) *map[int32]Extension {
return (*map[int32]Extension)(unsafe.Pointer(uintptr(p) + uintptr(f)))
}
// NewAt returns the reflect.Value for a pointer to a field in the struct.
func structPointer_NewAt(p structPointer, f field, typ reflect.Type) reflect.Value {
return reflect.NewAt(typ, unsafe.Pointer(uintptr(p)+uintptr(f)))
}
// SetStructPointer writes a *struct field in the struct.
func structPointer_SetStructPointer(p structPointer, f field, q structPointer) {
*(*structPointer)(unsafe.Pointer(uintptr(p) + uintptr(f))) = q
}
// GetStructPointer reads a *struct field in the struct.
func structPointer_GetStructPointer(p structPointer, f field) structPointer {
return *(*structPointer)(unsafe.Pointer(uintptr(p) + uintptr(f)))
}
// StructPointerSlice the address of a []*struct field in the struct.
func structPointer_StructPointerSlice(p structPointer, f field) *structPointerSlice {
return (*structPointerSlice)(unsafe.Pointer(uintptr(p) + uintptr(f)))
}
// A structPointerSlice represents a slice of pointers to structs (themselves submessages or groups).
type structPointerSlice []structPointer
func (v *structPointerSlice) Len() int { return len(*v) }
func (v *structPointerSlice) Index(i int) structPointer { return (*v)[i] }
func (v *structPointerSlice) Append(p structPointer) { *v = append(*v, p) }
// A word32 is the address of a "pointer to 32-bit value" field.
type word32 **uint32
// IsNil reports whether *v is nil.
func word32_IsNil(p word32) bool {
return *p == nil
}
// Set sets *v to point at a newly allocated word set to x.
func word32_Set(p word32, o *Buffer, x uint32) {
if len(o.uint32s) == 0 {
o.uint32s = make([]uint32, uint32PoolSize)
}
o.uint32s[0] = x
*p = &o.uint32s[0]
o.uint32s = o.uint32s[1:]
}
// Get gets the value pointed at by *v.
func word32_Get(p word32) uint32 {
return **p
}
// Word32 returns the address of a *int32, *uint32, *float32, or *enum field in the struct.
func structPointer_Word32(p structPointer, f field) word32 {
return word32((**uint32)(unsafe.Pointer(uintptr(p) + uintptr(f))))
}
// A word32Val is the address of a 32-bit value field.
type word32Val *uint32
// Set sets *p to x.
func word32Val_Set(p word32Val, x uint32) {
*p = x
}
// Get gets the value pointed at by p.
func word32Val_Get(p word32Val) uint32 {
return *p
}
// Word32Val returns the address of a *int32, *uint32, *float32, or *enum field in the struct.
func structPointer_Word32Val(p structPointer, f field) word32Val {
return word32Val((*uint32)(unsafe.Pointer(uintptr(p) + uintptr(f))))
}
// A word32Slice is a slice of 32-bit values.
type word32Slice []uint32
func (v *word32Slice) Append(x uint32) { *v = append(*v, x) }
func (v *word32Slice) Len() int { return len(*v) }
func (v *word32Slice) Index(i int) uint32 { return (*v)[i] }
// Word32Slice returns the address of a []int32, []uint32, []float32, or []enum field in the struct.
func structPointer_Word32Slice(p structPointer, f field) *word32Slice {
return (*word32Slice)(unsafe.Pointer(uintptr(p) + uintptr(f)))
}
// word64 is like word32 but for 64-bit values.
type word64 **uint64
func word64_Set(p word64, o *Buffer, x uint64) {
if len(o.uint64s) == 0 {
o.uint64s = make([]uint64, uint64PoolSize)
}
o.uint64s[0] = x
*p = &o.uint64s[0]
o.uint64s = o.uint64s[1:]
}
func word64_IsNil(p word64) bool {
return *p == nil
}
func word64_Get(p word64) uint64 {
return **p
}
func structPointer_Word64(p structPointer, f field) word64 {
return word64((**uint64)(unsafe.Pointer(uintptr(p) + uintptr(f))))
}
// word64Val is like word32Val but for 64-bit values.
type word64Val *uint64
func word64Val_Set(p word64Val, o *Buffer, x uint64) {
*p = x
}
func word64Val_Get(p word64Val) uint64 {
return *p
}
func structPointer_Word64Val(p structPointer, f field) word64Val {
return word64Val((*uint64)(unsafe.Pointer(uintptr(p) + uintptr(f))))
}
// word64Slice is like word32Slice but for 64-bit values.
type word64Slice []uint64
func (v *word64Slice) Append(x uint64) { *v = append(*v, x) }
func (v *word64Slice) Len() int { return len(*v) }
func (v *word64Slice) Index(i int) uint64 { return (*v)[i] }
func structPointer_Word64Slice(p structPointer, f field) *word64Slice {
return (*word64Slice)(unsafe.Pointer(uintptr(p) + uintptr(f)))
}

872
vendor/github.com/golang/protobuf/proto/properties.go generated vendored
View File

@ -1,872 +0,0 @@
// Go support for Protocol Buffers - Google's data interchange format
//
// Copyright 2010 The Go Authors. All rights reserved.
// https://github.com/golang/protobuf
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package proto
/*
* Routines for encoding data into the wire format for protocol buffers.
*/
import (
"fmt"
"log"
"os"
"reflect"
"sort"
"strconv"
"strings"
"sync"
)
const debug bool = false
// Constants that identify the encoding of a value on the wire.
const (
WireVarint = 0
WireFixed64 = 1
WireBytes = 2
WireStartGroup = 3
WireEndGroup = 4
WireFixed32 = 5
)
const startSize = 10 // initial slice/string sizes
// Encoders are defined in encode.go
// An encoder outputs the full representation of a field, including its
// tag and encoder type.
type encoder func(p *Buffer, prop *Properties, base structPointer) error
// A valueEncoder encodes a single integer in a particular encoding.
type valueEncoder func(o *Buffer, x uint64) error
// Sizers are defined in encode.go
// A sizer returns the encoded size of a field, including its tag and encoder
// type.
type sizer func(prop *Properties, base structPointer) int
// A valueSizer returns the encoded size of a single integer in a particular
// encoding.
type valueSizer func(x uint64) int
// Decoders are defined in decode.go
// A decoder creates a value from its wire representation.
// Unrecognized subelements are saved in unrec.
type decoder func(p *Buffer, prop *Properties, base structPointer) error
// A valueDecoder decodes a single integer in a particular encoding.
type valueDecoder func(o *Buffer) (x uint64, err error)
// A oneofMarshaler does the marshaling for all oneof fields in a message.
type oneofMarshaler func(Message, *Buffer) error
// A oneofUnmarshaler does the unmarshaling for a oneof field in a message.
type oneofUnmarshaler func(Message, int, int, *Buffer) (bool, error)
// A oneofSizer does the sizing for all oneof fields in a message.
type oneofSizer func(Message) int
// tagMap is an optimization over map[int]int for typical protocol buffer
// use-cases. Encoded protocol buffers are often in tag order with small tag
// numbers.
type tagMap struct {
fastTags []int
slowTags map[int]int
}
// tagMapFastLimit is the upper bound on the tag number that will be stored in
// the tagMap slice rather than its map.
const tagMapFastLimit = 1024
func (p *tagMap) get(t int) (int, bool) {
if t > 0 && t < tagMapFastLimit {
if t >= len(p.fastTags) {
return 0, false
}
fi := p.fastTags[t]
return fi, fi >= 0
}
fi, ok := p.slowTags[t]
return fi, ok
}
func (p *tagMap) put(t int, fi int) {
if t > 0 && t < tagMapFastLimit {
for len(p.fastTags) < t+1 {
p.fastTags = append(p.fastTags, -1)
}
p.fastTags[t] = fi
return
}
if p.slowTags == nil {
p.slowTags = make(map[int]int)
}
p.slowTags[t] = fi
}
// StructProperties represents properties for all the fields of a struct.
// decoderTags and decoderOrigNames should only be used by the decoder.
type StructProperties struct {
Prop []*Properties // properties for each field
reqCount int // required count
decoderTags tagMap // map from proto tag to struct field number
decoderOrigNames map[string]int // map from original name to struct field number
order []int // list of struct field numbers in tag order
unrecField field // field id of the XXX_unrecognized []byte field
extendable bool // is this an extendable proto
oneofMarshaler oneofMarshaler
oneofUnmarshaler oneofUnmarshaler
oneofSizer oneofSizer
stype reflect.Type
// OneofTypes contains information about the oneof fields in this message.
// It is keyed by the original name of a field.
OneofTypes map[string]*OneofProperties
}
// OneofProperties represents information about a specific field in a oneof.
type OneofProperties struct {
Type reflect.Type // pointer to generated struct type for this oneof field
Field int // struct field number of the containing oneof in the message
Prop *Properties
}
// Implement the sorting interface so we can sort the fields in tag order, as recommended by the spec.
// See encode.go, (*Buffer).enc_struct.
func (sp *StructProperties) Len() int { return len(sp.order) }
func (sp *StructProperties) Less(i, j int) bool {
return sp.Prop[sp.order[i]].Tag < sp.Prop[sp.order[j]].Tag
}
func (sp *StructProperties) Swap(i, j int) { sp.order[i], sp.order[j] = sp.order[j], sp.order[i] }
// Properties represents the protocol-specific behavior of a single struct field.
type Properties struct {
Name string // name of the field, for error messages
OrigName string // original name before protocol compiler (always set)
JSONName string // name to use for JSON; determined by protoc
Wire string
WireType int
Tag int
Required bool
Optional bool
Repeated bool
Packed bool // relevant for repeated primitives only
Enum string // set for enum types only
proto3 bool // whether this is known to be a proto3 field; set for []byte only
oneof bool // whether this is a oneof field
Default string // default value
HasDefault bool // whether an explicit default was provided
def_uint64 uint64
enc encoder
valEnc valueEncoder // set for bool and numeric types only
field field
tagcode []byte // encoding of EncodeVarint((Tag<<3)|WireType)
tagbuf [8]byte
stype reflect.Type // set for struct types only
sprop *StructProperties // set for struct types only
isMarshaler bool
isUnmarshaler bool
mtype reflect.Type // set for map types only
mkeyprop *Properties // set for map types only
mvalprop *Properties // set for map types only
size sizer
valSize valueSizer // set for bool and numeric types only
dec decoder
valDec valueDecoder // set for bool and numeric types only
// If this is a packable field, this will be the decoder for the packed version of the field.
packedDec decoder
}
// String formats the properties in the protobuf struct field tag style.
func (p *Properties) String() string {
s := p.Wire
s = ","
s += strconv.Itoa(p.Tag)
if p.Required {
s += ",req"
}
if p.Optional {
s += ",opt"
}
if p.Repeated {
s += ",rep"
}
if p.Packed {
s += ",packed"
}
s += ",name=" + p.OrigName
if p.JSONName != p.OrigName {
s += ",json=" + p.JSONName
}
if p.proto3 {
s += ",proto3"
}
if p.oneof {
s += ",oneof"
}
if len(p.Enum) > 0 {
s += ",enum=" + p.Enum
}
if p.HasDefault {
s += ",def=" + p.Default
}
return s
}
// Parse populates p by parsing a string in the protobuf struct field tag style.
func (p *Properties) Parse(s string) {
// "bytes,49,opt,name=foo,def=hello!"
fields := strings.Split(s, ",") // breaks def=, but handled below.
if len(fields) < 2 {
fmt.Fprintf(os.Stderr, "proto: tag has too few fields: %q\n", s)
return
}
p.Wire = fields[0]
switch p.Wire {
case "varint":
p.WireType = WireVarint
p.valEnc = (*Buffer).EncodeVarint
p.valDec = (*Buffer).DecodeVarint
p.valSize = sizeVarint
case "fixed32":
p.WireType = WireFixed32
p.valEnc = (*Buffer).EncodeFixed32
p.valDec = (*Buffer).DecodeFixed32
p.valSize = sizeFixed32
case "fixed64":
p.WireType = WireFixed64
p.valEnc = (*Buffer).EncodeFixed64
p.valDec = (*Buffer).DecodeFixed64
p.valSize = sizeFixed64
case "zigzag32":
p.WireType = WireVarint
p.valEnc = (*Buffer).EncodeZigzag32
p.valDec = (*Buffer).DecodeZigzag32
p.valSize = sizeZigzag32
case "zigzag64":
p.WireType = WireVarint
p.valEnc = (*Buffer).EncodeZigzag64
p.valDec = (*Buffer).DecodeZigzag64
p.valSize = sizeZigzag64
case "bytes", "group":
p.WireType = WireBytes
// no numeric converter for non-numeric types
default:
fmt.Fprintf(os.Stderr, "proto: tag has unknown wire type: %q\n", s)
return
}
var err error
p.Tag, err = strconv.Atoi(fields[1])
if err != nil {
return
}
for i := 2; i < len(fields); i++ {
f := fields[i]
switch {
case f == "req":
p.Required = true
case f == "opt":
p.Optional = true
case f == "rep":
p.Repeated = true
case f == "packed":
p.Packed = true
case strings.HasPrefix(f, "name="):
p.OrigName = f[5:]
case strings.HasPrefix(f, "json="):
p.JSONName = f[5:]
case strings.HasPrefix(f, "enum="):
p.Enum = f[5:]
case f == "proto3":
p.proto3 = true
case f == "oneof":
p.oneof = true
case strings.HasPrefix(f, "def="):
p.HasDefault = true
p.Default = f[4:] // rest of string
if i+1 < len(fields) {
// Commas aren't escaped, and def is always last.
p.Default += "," + strings.Join(fields[i+1:], ",")
break
}
}
}
}
func logNoSliceEnc(t1, t2 reflect.Type) {
fmt.Fprintf(os.Stderr, "proto: no slice oenc for %T = []%T\n", t1, t2)
}
var protoMessageType = reflect.TypeOf((*Message)(nil)).Elem()
// Initialize the fields for encoding and decoding.
func (p *Properties) setEncAndDec(typ reflect.Type, f *reflect.StructField, lockGetProp bool) {
p.enc = nil
p.dec = nil
p.size = nil
switch t1 := typ; t1.Kind() {
default:
fmt.Fprintf(os.Stderr, "proto: no coders for %v\n", t1)
// proto3 scalar types
case reflect.Bool:
p.enc = (*Buffer).enc_proto3_bool
p.dec = (*Buffer).dec_proto3_bool
p.size = size_proto3_bool
case reflect.Int32:
p.enc = (*Buffer).enc_proto3_int32
p.dec = (*Buffer).dec_proto3_int32
p.size = size_proto3_int32
case reflect.Uint32:
p.enc = (*Buffer).enc_proto3_uint32
p.dec = (*Buffer).dec_proto3_int32 // can reuse
p.size = size_proto3_uint32
case reflect.Int64, reflect.Uint64:
p.enc = (*Buffer).enc_proto3_int64
p.dec = (*Buffer).dec_proto3_int64
p.size = size_proto3_int64
case reflect.Float32:
p.enc = (*Buffer).enc_proto3_uint32 // can just treat them as bits
p.dec = (*Buffer).dec_proto3_int32
p.size = size_proto3_uint32
case reflect.Float64:
p.enc = (*Buffer).enc_proto3_int64 // can just treat them as bits
p.dec = (*Buffer).dec_proto3_int64
p.size = size_proto3_int64
case reflect.String:
p.enc = (*Buffer).enc_proto3_string
p.dec = (*Buffer).dec_proto3_string
p.size = size_proto3_string
case reflect.Ptr:
switch t2 := t1.Elem(); t2.Kind() {
default:
fmt.Fprintf(os.Stderr, "proto: no encoder function for %v -> %v\n", t1, t2)
break
case reflect.Bool:
p.enc = (*Buffer).enc_bool
p.dec = (*Buffer).dec_bool
p.size = size_bool
case reflect.Int32:
p.enc = (*Buffer).enc_int32
p.dec = (*Buffer).dec_int32
p.size = size_int32
case reflect.Uint32:
p.enc = (*Buffer).enc_uint32
p.dec = (*Buffer).dec_int32 // can reuse
p.size = size_uint32
case reflect.Int64, reflect.Uint64:
p.enc = (*Buffer).enc_int64
p.dec = (*Buffer).dec_int64
p.size = size_int64
case reflect.Float32:
p.enc = (*Buffer).enc_uint32 // can just treat them as bits
p.dec = (*Buffer).dec_int32
p.size = size_uint32
case reflect.Float64:
p.enc = (*Buffer).enc_int64 // can just treat them as bits
p.dec = (*Buffer).dec_int64
p.size = size_int64
case reflect.String:
p.enc = (*Buffer).enc_string
p.dec = (*Buffer).dec_string
p.size = size_string
case reflect.Struct:
p.stype = t1.Elem()
p.isMarshaler = isMarshaler(t1)
p.isUnmarshaler = isUnmarshaler(t1)
if p.Wire == "bytes" {
p.enc = (*Buffer).enc_struct_message
p.dec = (*Buffer).dec_struct_message
p.size = size_struct_message
} else {
p.enc = (*Buffer).enc_struct_group
p.dec = (*Buffer).dec_struct_group
p.size = size_struct_group
}
}
case reflect.Slice:
switch t2 := t1.Elem(); t2.Kind() {
default:
logNoSliceEnc(t1, t2)
break
case reflect.Bool:
if p.Packed {
p.enc = (*Buffer).enc_slice_packed_bool
p.size = size_slice_packed_bool
} else {
p.enc = (*Buffer).enc_slice_bool
p.size = size_slice_bool
}
p.dec = (*Buffer).dec_slice_bool
p.packedDec = (*Buffer).dec_slice_packed_bool
case reflect.Int32:
if p.Packed {
p.enc = (*Buffer).enc_slice_packed_int32
p.size = size_slice_packed_int32
} else {
p.enc = (*Buffer).enc_slice_int32
p.size = size_slice_int32
}
p.dec = (*Buffer).dec_slice_int32
p.packedDec = (*Buffer).dec_slice_packed_int32
case reflect.Uint32:
if p.Packed {
p.enc = (*Buffer).enc_slice_packed_uint32
p.size = size_slice_packed_uint32
} else {
p.enc = (*Buffer).enc_slice_uint32
p.size = size_slice_uint32
}
p.dec = (*Buffer).dec_slice_int32
p.packedDec = (*Buffer).dec_slice_packed_int32
case reflect.Int64, reflect.Uint64:
if p.Packed {
p.enc = (*Buffer).enc_slice_packed_int64
p.size = size_slice_packed_int64
} else {
p.enc = (*Buffer).enc_slice_int64
p.size = size_slice_int64
}
p.dec = (*Buffer).dec_slice_int64
p.packedDec = (*Buffer).dec_slice_packed_int64
case reflect.Uint8:
p.dec = (*Buffer).dec_slice_byte
if p.proto3 {
p.enc = (*Buffer).enc_proto3_slice_byte
p.size = size_proto3_slice_byte
} else {
p.enc = (*Buffer).enc_slice_byte
p.size = size_slice_byte
}
case reflect.Float32, reflect.Float64:
switch t2.Bits() {
case 32:
// can just treat them as bits
if p.Packed {
p.enc = (*Buffer).enc_slice_packed_uint32
p.size = size_slice_packed_uint32
} else {
p.enc = (*Buffer).enc_slice_uint32
p.size = size_slice_uint32
}
p.dec = (*Buffer).dec_slice_int32
p.packedDec = (*Buffer).dec_slice_packed_int32
case 64:
// can just treat them as bits
if p.Packed {
p.enc = (*Buffer).enc_slice_packed_int64
p.size = size_slice_packed_int64
} else {
p.enc = (*Buffer).enc_slice_int64
p.size = size_slice_int64
}
p.dec = (*Buffer).dec_slice_int64
p.packedDec = (*Buffer).dec_slice_packed_int64
default:
logNoSliceEnc(t1, t2)
break
}
case reflect.String:
p.enc = (*Buffer).enc_slice_string
p.dec = (*Buffer).dec_slice_string
p.size = size_slice_string
case reflect.Ptr:
switch t3 := t2.Elem(); t3.Kind() {
default:
fmt.Fprintf(os.Stderr, "proto: no ptr oenc for %T -> %T -> %T\n", t1, t2, t3)
break
case reflect.Struct:
p.stype = t2.Elem()
p.isMarshaler = isMarshaler(t2)
p.isUnmarshaler = isUnmarshaler(t2)
if p.Wire == "bytes" {
p.enc = (*Buffer).enc_slice_struct_message
p.dec = (*Buffer).dec_slice_struct_message
p.size = size_slice_struct_message
} else {
p.enc = (*Buffer).enc_slice_struct_group
p.dec = (*Buffer).dec_slice_struct_group
p.size = size_slice_struct_group
}
}
case reflect.Slice:
switch t2.Elem().Kind() {
default:
fmt.Fprintf(os.Stderr, "proto: no slice elem oenc for %T -> %T -> %T\n", t1, t2, t2.Elem())
break
case reflect.Uint8:
p.enc = (*Buffer).enc_slice_slice_byte
p.dec = (*Buffer).dec_slice_slice_byte
p.size = size_slice_slice_byte
}
}
case reflect.Map:
p.enc = (*Buffer).enc_new_map
p.dec = (*Buffer).dec_new_map
p.size = size_new_map
p.mtype = t1
p.mkeyprop = &Properties{}
p.mkeyprop.init(reflect.PtrTo(p.mtype.Key()), "Key", f.Tag.Get("protobuf_key"), nil, lockGetProp)
p.mvalprop = &Properties{}
vtype := p.mtype.Elem()
if vtype.Kind() != reflect.Ptr && vtype.Kind() != reflect.Slice {
// The value type is not a message (*T) or bytes ([]byte),
// so we need encoders for the pointer to this type.
vtype = reflect.PtrTo(vtype)
}
p.mvalprop.init(vtype, "Value", f.Tag.Get("protobuf_val"), nil, lockGetProp)
}
// precalculate tag code
wire := p.WireType
if p.Packed {
wire = WireBytes
}
x := uint32(p.Tag)<<3 | uint32(wire)
i := 0
for i = 0; x > 127; i++ {
p.tagbuf[i] = 0x80 | uint8(x&0x7F)
x >>= 7
}
p.tagbuf[i] = uint8(x)
p.tagcode = p.tagbuf[0 : i+1]
if p.stype != nil {
if lockGetProp {
p.sprop = GetProperties(p.stype)
} else {
p.sprop = getPropertiesLocked(p.stype)
}
}
}
var (
marshalerType = reflect.TypeOf((*Marshaler)(nil)).Elem()
unmarshalerType = reflect.TypeOf((*Unmarshaler)(nil)).Elem()
)
// isMarshaler reports whether type t implements Marshaler.
func isMarshaler(t reflect.Type) bool {
// We're checking for (likely) pointer-receiver methods
// so if t is not a pointer, something is very wrong.
// The calls above only invoke isMarshaler on pointer types.
if t.Kind() != reflect.Ptr {
panic("proto: misuse of isMarshaler")
}
return t.Implements(marshalerType)
}
// isUnmarshaler reports whether type t implements Unmarshaler.
func isUnmarshaler(t reflect.Type) bool {
// We're checking for (likely) pointer-receiver methods
// so if t is not a pointer, something is very wrong.
// The calls above only invoke isUnmarshaler on pointer types.
if t.Kind() != reflect.Ptr {
panic("proto: misuse of isUnmarshaler")
}
return t.Implements(unmarshalerType)
}
// Init populates the properties from a protocol buffer struct tag.
func (p *Properties) Init(typ reflect.Type, name, tag string, f *reflect.StructField) {
p.init(typ, name, tag, f, true)
}
func (p *Properties) init(typ reflect.Type, name, tag string, f *reflect.StructField, lockGetProp bool) {
// "bytes,49,opt,def=hello!"
p.Name = name
p.OrigName = name
if f != nil {
p.field = toField(f)
}
if tag == "" {
return
}
p.Parse(tag)
p.setEncAndDec(typ, f, lockGetProp)
}
var (
propertiesMu sync.RWMutex
propertiesMap = make(map[reflect.Type]*StructProperties)
)
// GetProperties returns the list of properties for the type represented by t.
// t must represent a generated struct type of a protocol message.
func GetProperties(t reflect.Type) *StructProperties {
if t.Kind() != reflect.Struct {
panic("proto: type must have kind struct")
}
// Most calls to GetProperties in a long-running program will be
// retrieving details for types we have seen before.
propertiesMu.RLock()
sprop, ok := propertiesMap[t]
propertiesMu.RUnlock()
if ok {
if collectStats {
stats.Chit++
}
return sprop
}
propertiesMu.Lock()
sprop = getPropertiesLocked(t)
propertiesMu.Unlock()
return sprop
}
// getPropertiesLocked requires that propertiesMu is held.
func getPropertiesLocked(t reflect.Type) *StructProperties {
if prop, ok := propertiesMap[t]; ok {
if collectStats {
stats.Chit++
}
return prop
}
if collectStats {
stats.Cmiss++
}
prop := new(StructProperties)
// in case of recursive protos, fill this in now.
propertiesMap[t] = prop
// build properties
prop.extendable = reflect.PtrTo(t).Implements(extendableProtoType) ||
reflect.PtrTo(t).Implements(extendableProtoV1Type)
prop.unrecField = invalidField
prop.Prop = make([]*Properties, t.NumField())
prop.order = make([]int, t.NumField())
for i := 0; i < t.NumField(); i++ {
f := t.Field(i)
p := new(Properties)
name := f.Name
p.init(f.Type, name, f.Tag.Get("protobuf"), &f, false)
if f.Name == "XXX_InternalExtensions" { // special case
p.enc = (*Buffer).enc_exts
p.dec = nil // not needed
p.size = size_exts
} else if f.Name == "XXX_extensions" { // special case
p.enc = (*Buffer).enc_map
p.dec = nil // not needed
p.size = size_map
} else if f.Name == "XXX_unrecognized" { // special case
prop.unrecField = toField(&f)
}
oneof := f.Tag.Get("protobuf_oneof") // special case
if oneof != "" {
// Oneof fields don't use the traditional protobuf tag.
p.OrigName = oneof
}
prop.Prop[i] = p
prop.order[i] = i
if debug {
print(i, " ", f.Name, " ", t.String(), " ")
if p.Tag > 0 {
print(p.String())
}
print("\n")
}
if p.enc == nil && !strings.HasPrefix(f.Name, "XXX_") && oneof == "" {
fmt.Fprintln(os.Stderr, "proto: no encoder for", f.Name, f.Type.String(), "[GetProperties]")
}
}
// Re-order prop.order.
sort.Sort(prop)
type oneofMessage interface {
XXX_OneofFuncs() (func(Message, *Buffer) error, func(Message, int, int, *Buffer) (bool, error), func(Message) int, []interface{})
}
if om, ok := reflect.Zero(reflect.PtrTo(t)).Interface().(oneofMessage); ok {
var oots []interface{}
prop.oneofMarshaler, prop.oneofUnmarshaler, prop.oneofSizer, oots = om.XXX_OneofFuncs()
prop.stype = t
// Interpret oneof metadata.
prop.OneofTypes = make(map[string]*OneofProperties)
for _, oot := range oots {
oop := &OneofProperties{
Type: reflect.ValueOf(oot).Type(), // *T
Prop: new(Properties),
}
sft := oop.Type.Elem().Field(0)
oop.Prop.Name = sft.Name
oop.Prop.Parse(sft.Tag.Get("protobuf"))
// There will be exactly one interface field that
// this new value is assignable to.
for i := 0; i < t.NumField(); i++ {
f := t.Field(i)
if f.Type.Kind() != reflect.Interface {
continue
}
if !oop.Type.AssignableTo(f.Type) {
continue
}
oop.Field = i
break
}
prop.OneofTypes[oop.Prop.OrigName] = oop
}
}
// build required counts
// build tags
reqCount := 0
prop.decoderOrigNames = make(map[string]int)
for i, p := range prop.Prop {
if strings.HasPrefix(p.Name, "XXX_") {
// Internal fields should not appear in tags/origNames maps.
// They are handled specially when encoding and decoding.
continue
}
if p.Required {
reqCount++
}
prop.decoderTags.put(p.Tag, i)
prop.decoderOrigNames[p.OrigName] = i
}
prop.reqCount = reqCount
return prop
}
// Return the Properties object for the x[0]'th field of the structure.
func propByIndex(t reflect.Type, x []int) *Properties {
if len(x) != 1 {
fmt.Fprintf(os.Stderr, "proto: field index dimension %d (not 1) for type %s\n", len(x), t)
return nil
}
prop := GetProperties(t)
return prop.Prop[x[0]]
}
// Get the address and type of a pointer to a struct from an interface.
func getbase(pb Message) (t reflect.Type, b structPointer, err error) {
if pb == nil {
err = ErrNil
return
}
// get the reflect type of the pointer to the struct.
t = reflect.TypeOf(pb)
// get the address of the struct.
value := reflect.ValueOf(pb)
b = toStructPointer(value)
return
}
// A global registry of enum types.
// The generated code will register the generated maps by calling RegisterEnum.
var enumValueMaps = make(map[string]map[string]int32)
// RegisterEnum is called from the generated code to install the enum descriptor
// maps into the global table to aid parsing text format protocol buffers.
func RegisterEnum(typeName string, unusedNameMap map[int32]string, valueMap map[string]int32) {
if _, ok := enumValueMaps[typeName]; ok {
panic("proto: duplicate enum registered: " + typeName)
}
enumValueMaps[typeName] = valueMap
}
// EnumValueMap returns the mapping from names to integers of the
// enum type enumType, or a nil if not found.
func EnumValueMap(enumType string) map[string]int32 {
return enumValueMaps[enumType]
}
// A registry of all linked message types.
// The string is a fully-qualified proto name ("pkg.Message").
var (
protoTypes = make(map[string]reflect.Type)
revProtoTypes = make(map[reflect.Type]string)
)
// RegisterType is called from generated code and maps from the fully qualified
// proto name to the type (pointer to struct) of the protocol buffer.
func RegisterType(x Message, name string) {
if _, ok := protoTypes[name]; ok {
// TODO: Some day, make this a panic.
log.Printf("proto: duplicate proto type registered: %s", name)
return
}
t := reflect.TypeOf(x)
protoTypes[name] = t
revProtoTypes[t] = name
}
// MessageName returns the fully-qualified proto name for the given message type.
func MessageName(x Message) string {
type xname interface {
XXX_MessageName() string
}
if m, ok := x.(xname); ok {
return m.XXX_MessageName()
}
return revProtoTypes[reflect.TypeOf(x)]
}
// MessageType returns the message type (pointer to struct) for a named message.
func MessageType(name string) reflect.Type { return protoTypes[name] }
// A registry of all linked proto files.
var (
protoFiles = make(map[string][]byte) // file name => fileDescriptor
)
// RegisterFile is called from generated code and maps from the
// full file name of a .proto file to its compressed FileDescriptorProto.
func RegisterFile(filename string, fileDescriptor []byte) {
protoFiles[filename] = fileDescriptor
}
// FileDescriptor returns the compressed FileDescriptorProto for a .proto file.
func FileDescriptor(filename string) []byte { return protoFiles[filename] }

854
vendor/github.com/golang/protobuf/proto/text.go generated vendored
View File

@ -1,854 +0,0 @@
// Go support for Protocol Buffers - Google's data interchange format
//
// Copyright 2010 The Go Authors. All rights reserved.
// https://github.com/golang/protobuf
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package proto
// Functions for writing the text protocol buffer format.
import (
"bufio"
"bytes"
"encoding"
"errors"
"fmt"
"io"
"log"
"math"
"reflect"
"sort"
"strings"
)
var (
newline = []byte("\n")
spaces = []byte(" ")
gtNewline = []byte(">\n")
endBraceNewline = []byte("}\n")
backslashN = []byte{'\\', 'n'}
backslashR = []byte{'\\', 'r'}
backslashT = []byte{'\\', 't'}
backslashDQ = []byte{'\\', '"'}
backslashBS = []byte{'\\', '\\'}
posInf = []byte("inf")
negInf = []byte("-inf")
nan = []byte("nan")
)
type writer interface {
io.Writer
WriteByte(byte) error
}
// textWriter is an io.Writer that tracks its indentation level.
type textWriter struct {
ind int
complete bool // if the current position is a complete line
compact bool // whether to write out as a one-liner
w writer
}
func (w *textWriter) WriteString(s string) (n int, err error) {
if !strings.Contains(s, "\n") {
if !w.compact && w.complete {
w.writeIndent()
}
w.complete = false
return io.WriteString(w.w, s)
}
// WriteString is typically called without newlines, so this
// codepath and its copy are rare. We copy to avoid
// duplicating all of Write's logic here.
return w.Write([]byte(s))
}
func (w *textWriter) Write(p []byte) (n int, err error) {
newlines := bytes.Count(p, newline)
if newlines == 0 {
if !w.compact && w.complete {
w.writeIndent()
}
n, err = w.w.Write(p)
w.complete = false
return n, err
}
frags := bytes.SplitN(p, newline, newlines+1)
if w.compact {
for i, frag := range frags {
if i > 0 {
if err := w.w.WriteByte(' '); err != nil {
return n, err
}
n++
}
nn, err := w.w.Write(frag)
n += nn
if err != nil {
return n, err
}
}
return n, nil
}
for i, frag := range frags {
if w.complete {
w.writeIndent()
}
nn, err := w.w.Write(frag)
n += nn
if err != nil {
return n, err
}
if i+1 < len(frags) {
if err := w.w.WriteByte('\n'); err != nil {
return n, err
}
n++
}
}
w.complete = len(frags[len(frags)-1]) == 0
return n, nil
}
func (w *textWriter) WriteByte(c byte) error {
if w.compact && c == '\n' {
c = ' '
}
if !w.compact && w.complete {
w.writeIndent()
}
err := w.w.WriteByte(c)
w.complete = c == '\n'
return err
}
func (w *textWriter) indent() { w.ind++ }
func (w *textWriter) unindent() {
if w.ind == 0 {
log.Print("proto: textWriter unindented too far")
return
}
w.ind--
}
func writeName(w *textWriter, props *Properties) error {
if _, err := w.WriteString(props.OrigName); err != nil {
return err
}
if props.Wire != "group" {
return w.WriteByte(':')
}
return nil
}
// raw is the interface satisfied by RawMessage.
type raw interface {
Bytes() []byte
}
func requiresQuotes(u string) bool {
// When type URL contains any characters except [0-9A-Za-z./\-]*, it must be quoted.
for _, ch := range u {
switch {
case ch == '.' || ch == '/' || ch == '_':
continue
case '0' <= ch && ch <= '9':
continue
case 'A' <= ch && ch <= 'Z':
continue
case 'a' <= ch && ch <= 'z':
continue
default:
return true
}
}
return false
}
// isAny reports whether sv is a google.protobuf.Any message
func isAny(sv reflect.Value) bool {
type wkt interface {
XXX_WellKnownType() string
}
t, ok := sv.Addr().Interface().(wkt)
return ok && t.XXX_WellKnownType() == "Any"
}
// writeProto3Any writes an expanded google.protobuf.Any message.
//
// It returns (false, nil) if sv value can't be unmarshaled (e.g. because
// required messages are not linked in).
//
// It returns (true, error) when sv was written in expanded format or an error
// was encountered.
func (tm *TextMarshaler) writeProto3Any(w *textWriter, sv reflect.Value) (bool, error) {
turl := sv.FieldByName("TypeUrl")
val := sv.FieldByName("Value")
if !turl.IsValid() || !val.IsValid() {
return true, errors.New("proto: invalid google.protobuf.Any message")
}
b, ok := val.Interface().([]byte)
if !ok {
return true, errors.New("proto: invalid google.protobuf.Any message")
}
parts := strings.Split(turl.String(), "/")
mt := MessageType(parts[len(parts)-1])
if mt == nil {
return false, nil
}
m := reflect.New(mt.Elem())
if err := Unmarshal(b, m.Interface().(Message)); err != nil {
return false, nil
}
w.Write([]byte("["))
u := turl.String()
if requiresQuotes(u) {
writeString(w, u)
} else {
w.Write([]byte(u))
}
if w.compact {
w.Write([]byte("]:<"))
} else {
w.Write([]byte("]: <\n"))
w.ind++
}
if err := tm.writeStruct(w, m.Elem()); err != nil {
return true, err
}
if w.compact {
w.Write([]byte("> "))
} else {
w.ind--
w.Write([]byte(">\n"))
}
return true, nil
}
func (tm *TextMarshaler) writeStruct(w *textWriter, sv reflect.Value) error {
if tm.ExpandAny && isAny(sv) {
if canExpand, err := tm.writeProto3Any(w, sv); canExpand {
return err
}
}
st := sv.Type()
sprops := GetProperties(st)
for i := 0; i < sv.NumField(); i++ {
fv := sv.Field(i)
props := sprops.Prop[i]
name := st.Field(i).Name
if strings.HasPrefix(name, "XXX_") {
// There are two XXX_ fields:
// XXX_unrecognized []byte
// XXX_extensions map[int32]proto.Extension
// The first is handled here;
// the second is handled at the bottom of this function.
if name == "XXX_unrecognized" && !fv.IsNil() {
if err := writeUnknownStruct(w, fv.Interface().([]byte)); err != nil {
return err
}
}
continue
}
if fv.Kind() == reflect.Ptr && fv.IsNil() {
// Field not filled in. This could be an optional field or
// a required field that wasn't filled in. Either way, there
// isn't anything we can show for it.
continue
}
if fv.Kind() == reflect.Slice && fv.IsNil() {
// Repeated field that is empty, or a bytes field that is unused.
continue
}
if props.Repeated && fv.Kind() == reflect.Slice {
// Repeated field.
for j := 0; j < fv.Len(); j++ {
if err := writeName(w, props); err != nil {
return err
}
if !w.compact {
if err := w.WriteByte(' '); err != nil {
return err
}
}
v := fv.Index(j)
if v.Kind() == reflect.Ptr && v.IsNil() {
// A nil message in a repeated field is not valid,
// but we can handle that more gracefully than panicking.
if _, err := w.Write([]byte("<nil>\n")); err != nil {
return err
}
continue
}
if err := tm.writeAny(w, v, props); err != nil {
return err
}
if err := w.WriteByte('\n'); err != nil {
return err
}
}
continue
}
if fv.Kind() == reflect.Map {
// Map fields are rendered as a repeated struct with key/value fields.
keys := fv.MapKeys()
sort.Sort(mapKeys(keys))
for _, key := range keys {
val := fv.MapIndex(key)
if err := writeName(w, props); err != nil {
return err
}
if !w.compact {
if err := w.WriteByte(' '); err != nil {
return err
}
}
// open struct
if err := w.WriteByte('<'); err != nil {
return err
}
if !w.compact {
if err := w.WriteByte('\n'); err != nil {
return err
}
}
w.indent()
// key
if _, err := w.WriteString("key:"); err != nil {
return err
}
if !w.compact {
if err := w.WriteByte(' '); err != nil {
return err
}
}
if err := tm.writeAny(w, key, props.mkeyprop); err != nil {
return err
}
if err := w.WriteByte('\n'); err != nil {
return err
}
// nil values aren't legal, but we can avoid panicking because of them.
if val.Kind() != reflect.Ptr || !val.IsNil() {
// value
if _, err := w.WriteString("value:"); err != nil {
return err
}
if !w.compact {
if err := w.WriteByte(' '); err != nil {
return err
}
}
if err := tm.writeAny(w, val, props.mvalprop); err != nil {
return err
}
if err := w.WriteByte('\n'); err != nil {
return err
}
}
// close struct
w.unindent()
if err := w.WriteByte('>'); err != nil {
return err
}
if err := w.WriteByte('\n'); err != nil {
return err
}
}
continue
}
if props.proto3 && fv.Kind() == reflect.Slice && fv.Len() == 0 {
// empty bytes field
continue
}
if fv.Kind() != reflect.Ptr && fv.Kind() != reflect.Slice {
// proto3 non-repeated scalar field; skip if zero value
if isProto3Zero(fv) {
continue
}
}
if fv.Kind() == reflect.Interface {
// Check if it is a oneof.
if st.Field(i).Tag.Get("protobuf_oneof") != "" {
// fv is nil, or holds a pointer to generated struct.
// That generated struct has exactly one field,
// which has a protobuf struct tag.
if fv.IsNil() {
continue
}
inner := fv.Elem().Elem() // interface -> *T -> T
tag := inner.Type().Field(0).Tag.Get("protobuf")
props = new(Properties) // Overwrite the outer props var, but not its pointee.
props.Parse(tag)
// Write the value in the oneof, not the oneof itself.
fv = inner.Field(0)
// Special case to cope with malformed messages gracefully:
// If the value in the oneof is a nil pointer, don't panic
// in writeAny.
if fv.Kind() == reflect.Ptr && fv.IsNil() {
// Use errors.New so writeAny won't render quotes.
msg := errors.New("/* nil */")
fv = reflect.ValueOf(&msg).Elem()
}
}
}
if err := writeName(w, props); err != nil {
return err
}
if !w.compact {
if err := w.WriteByte(' '); err != nil {
return err
}
}
if b, ok := fv.Interface().(raw); ok {
if err := writeRaw(w, b.Bytes()); err != nil {
return err
}
continue
}
// Enums have a String method, so writeAny will work fine.
if err := tm.writeAny(w, fv, props); err != nil {
return err
}
if err := w.WriteByte('\n'); err != nil {
return err
}
}
// Extensions (the XXX_extensions field).
pv := sv.Addr()
if _, ok := extendable(pv.Interface()); ok {
if err := tm.writeExtensions(w, pv); err != nil {
return err
}
}
return nil
}
// writeRaw writes an uninterpreted raw message.
func writeRaw(w *textWriter, b []byte) error {
if err := w.WriteByte('<'); err != nil {
return err
}
if !w.compact {
if err := w.WriteByte('\n'); err != nil {
return err
}
}
w.indent()
if err := writeUnknownStruct(w, b); err != nil {
return err
}
w.unindent()
if err := w.WriteByte('>'); err != nil {
return err
}
return nil
}
// writeAny writes an arbitrary field.
func (tm *TextMarshaler) writeAny(w *textWriter, v reflect.Value, props *Properties) error {
v = reflect.Indirect(v)
// Floats have special cases.
if v.Kind() == reflect.Float32 || v.Kind() == reflect.Float64 {
x := v.Float()
var b []byte
switch {
case math.IsInf(x, 1):
b = posInf
case math.IsInf(x, -1):
b = negInf
case math.IsNaN(x):
b = nan
}
if b != nil {
_, err := w.Write(b)
return err
}
// Other values are handled below.
}
// We don't attempt to serialise every possible value type; only those
// that can occur in protocol buffers.
switch v.Kind() {
case reflect.Slice:
// Should only be a []byte; repeated fields are handled in writeStruct.
if err := writeString(w, string(v.Bytes())); err != nil {
return err
}
case reflect.String:
if err := writeString(w, v.String()); err != nil {
return err
}
case reflect.Struct:
// Required/optional group/message.
var bra, ket byte = '<', '>'
if props != nil && props.Wire == "group" {
bra, ket = '{', '}'
}
if err := w.WriteByte(bra); err != nil {
return err
}
if !w.compact {
if err := w.WriteByte('\n'); err != nil {
return err
}
}
w.indent()
if etm, ok := v.Interface().(encoding.TextMarshaler); ok {
text, err := etm.MarshalText()
if err != nil {
return err
}
if _, err = w.Write(text); err != nil {
return err
}
} else if err := tm.writeStruct(w, v); err != nil {
return err
}
w.unindent()
if err := w.WriteByte(ket); err != nil {
return err
}
default:
_, err := fmt.Fprint(w, v.Interface())
return err
}
return nil
}
// equivalent to C's isprint.
func isprint(c byte) bool {
return c >= 0x20 && c < 0x7f
}
// writeString writes a string in the protocol buffer text format.
// It is similar to strconv.Quote except we don't use Go escape sequences,
// we treat the string as a byte sequence, and we use octal escapes.
// These differences are to maintain interoperability with the other
// languages' implementations of the text format.
func writeString(w *textWriter, s string) error {
// use WriteByte here to get any needed indent
if err := w.WriteByte('"'); err != nil {
return err
}
// Loop over the bytes, not the runes.
for i := 0; i < len(s); i++ {
var err error
// Divergence from C++: we don't escape apostrophes.
// There's no need to escape them, and the C++ parser
// copes with a naked apostrophe.
switch c := s[i]; c {
case '\n':
_, err = w.w.Write(backslashN)
case '\r':
_, err = w.w.Write(backslashR)
case '\t':
_, err = w.w.Write(backslashT)
case '"':
_, err = w.w.Write(backslashDQ)
case '\\':
_, err = w.w.Write(backslashBS)
default:
if isprint(c) {
err = w.w.WriteByte(c)
} else {
_, err = fmt.Fprintf(w.w, "\\%03o", c)
}
}
if err != nil {
return err
}
}
return w.WriteByte('"')
}
func writeUnknownStruct(w *textWriter, data []byte) (err error) {
if !w.compact {
if _, err := fmt.Fprintf(w, "/* %d unknown bytes */\n", len(data)); err != nil {
return err
}
}
b := NewBuffer(data)
for b.index < len(b.buf) {
x, err := b.DecodeVarint()
if err != nil {
_, err := fmt.Fprintf(w, "/* %v */\n", err)
return err
}
wire, tag := x&7, x>>3
if wire == WireEndGroup {
w.unindent()
if _, err := w.Write(endBraceNewline); err != nil {
return err
}
continue
}
if _, err := fmt.Fprint(w, tag); err != nil {
return err
}
if wire != WireStartGroup {
if err := w.WriteByte(':'); err != nil {
return err
}
}
if !w.compact || wire == WireStartGroup {
if err := w.WriteByte(' '); err != nil {
return err
}
}
switch wire {
case WireBytes:
buf, e := b.DecodeRawBytes(false)
if e == nil {
_, err = fmt.Fprintf(w, "%q", buf)
} else {
_, err = fmt.Fprintf(w, "/* %v */", e)
}
case WireFixed32:
x, err = b.DecodeFixed32()
err = writeUnknownInt(w, x, err)
case WireFixed64:
x, err = b.DecodeFixed64()
err = writeUnknownInt(w, x, err)
case WireStartGroup:
err = w.WriteByte('{')
w.indent()
case WireVarint:
x, err = b.DecodeVarint()
err = writeUnknownInt(w, x, err)
default:
_, err = fmt.Fprintf(w, "/* unknown wire type %d */", wire)
}
if err != nil {
return err
}
if err = w.WriteByte('\n'); err != nil {
return err
}
}
return nil
}
func writeUnknownInt(w *textWriter, x uint64, err error) error {
if err == nil {
_, err = fmt.Fprint(w, x)
} else {
_, err = fmt.Fprintf(w, "/* %v */", err)
}
return err
}
type int32Slice []int32
func (s int32Slice) Len() int { return len(s) }
func (s int32Slice) Less(i, j int) bool { return s[i] < s[j] }
func (s int32Slice) Swap(i, j int) { s[i], s[j] = s[j], s[i] }
// writeExtensions writes all the extensions in pv.
// pv is assumed to be a pointer to a protocol message struct that is extendable.
func (tm *TextMarshaler) writeExtensions(w *textWriter, pv reflect.Value) error {
emap := extensionMaps[pv.Type().Elem()]
ep, _ := extendable(pv.Interface())
// Order the extensions by ID.
// This isn't strictly necessary, but it will give us
// canonical output, which will also make testing easier.
m, mu := ep.extensionsRead()
if m == nil {
return nil
}
mu.Lock()
ids := make([]int32, 0, len(m))
for id := range m {
ids = append(ids, id)
}
sort.Sort(int32Slice(ids))
mu.Unlock()
for _, extNum := range ids {
ext := m[extNum]
var desc *ExtensionDesc
if emap != nil {
desc = emap[extNum]
}
if desc == nil {
// Unknown extension.
if err := writeUnknownStruct(w, ext.enc); err != nil {
return err
}
continue
}
pb, err := GetExtension(ep, desc)
if err != nil {
return fmt.Errorf("failed getting extension: %v", err)
}
// Repeated extensions will appear as a slice.
if !desc.repeated() {
if err := tm.writeExtension(w, desc.Name, pb); err != nil {
return err
}
} else {
v := reflect.ValueOf(pb)
for i := 0; i < v.Len(); i++ {
if err := tm.writeExtension(w, desc.Name, v.Index(i).Interface()); err != nil {
return err
}
}
}
}
return nil
}
func (tm *TextMarshaler) writeExtension(w *textWriter, name string, pb interface{}) error {
if _, err := fmt.Fprintf(w, "[%s]:", name); err != nil {
return err
}
if !w.compact {
if err := w.WriteByte(' '); err != nil {
return err
}
}
if err := tm.writeAny(w, reflect.ValueOf(pb), nil); err != nil {
return err
}
if err := w.WriteByte('\n'); err != nil {
return err
}
return nil
}
func (w *textWriter) writeIndent() {
if !w.complete {
return
}
remain := w.ind * 2
for remain > 0 {
n := remain
if n > len(spaces) {
n = len(spaces)
}
w.w.Write(spaces[:n])
remain -= n
}
w.complete = false
}
// TextMarshaler is a configurable text format marshaler.
type TextMarshaler struct {
Compact bool // use compact text format (one line).
ExpandAny bool // expand google.protobuf.Any messages of known types
}
// Marshal writes a given protocol buffer in text format.
// The only errors returned are from w.
func (tm *TextMarshaler) Marshal(w io.Writer, pb Message) error {
val := reflect.ValueOf(pb)
if pb == nil || val.IsNil() {
w.Write([]byte("<nil>"))
return nil
}
var bw *bufio.Writer
ww, ok := w.(writer)
if !ok {
bw = bufio.NewWriter(w)
ww = bw
}
aw := &textWriter{
w: ww,
complete: true,
compact: tm.Compact,
}
if etm, ok := pb.(encoding.TextMarshaler); ok {
text, err := etm.MarshalText()
if err != nil {
return err
}
if _, err = aw.Write(text); err != nil {
return err
}
if bw != nil {
return bw.Flush()
}
return nil
}
// Dereference the received pointer so we don't have outer < and >.
v := reflect.Indirect(val)
if err := tm.writeStruct(aw, v); err != nil {
return err
}
if bw != nil {
return bw.Flush()
}
return nil
}
// Text is the same as Marshal, but returns the string directly.
func (tm *TextMarshaler) Text(pb Message) string {
var buf bytes.Buffer
tm.Marshal(&buf, pb)
return buf.String()
}
var (
defaultTextMarshaler = TextMarshaler{}
compactTextMarshaler = TextMarshaler{Compact: true}
)
// TODO: consider removing some of the Marshal functions below.
// MarshalText writes a given protocol buffer in text format.
// The only errors returned are from w.
func MarshalText(w io.Writer, pb Message) error { return defaultTextMarshaler.Marshal(w, pb) }
// MarshalTextString is the same as MarshalText, but returns the string directly.
func MarshalTextString(pb Message) string { return defaultTextMarshaler.Text(pb) }
// CompactText writes a given protocol buffer in compact text format (one line).
func CompactText(w io.Writer, pb Message) error { return compactTextMarshaler.Marshal(w, pb) }
// CompactTextString is the same as CompactText, but returns the string directly.
func CompactTextString(pb Message) string { return compactTextMarshaler.Text(pb) }

895
vendor/github.com/golang/protobuf/proto/text_parser.go generated vendored
View File

@ -1,895 +0,0 @@
// Go support for Protocol Buffers - Google's data interchange format
//
// Copyright 2010 The Go Authors. All rights reserved.
// https://github.com/golang/protobuf
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package proto
// Functions for parsing the Text protocol buffer format.
// TODO: message sets.
import (
"encoding"
"errors"
"fmt"
"reflect"
"strconv"
"strings"
"unicode/utf8"
)
// Error string emitted when deserializing Any and fields are already set
const anyRepeatedlyUnpacked = "Any message unpacked multiple times, or %q already set"
type ParseError struct {
Message string
Line int // 1-based line number
Offset int // 0-based byte offset from start of input
}
func (p *ParseError) Error() string {
if p.Line == 1 {
// show offset only for first line
return fmt.Sprintf("line 1.%d: %v", p.Offset, p.Message)
}
return fmt.Sprintf("line %d: %v", p.Line, p.Message)
}
type token struct {
value string
err *ParseError
line int // line number
offset int // byte number from start of input, not start of line
unquoted string // the unquoted version of value, if it was a quoted string
}
func (t *token) String() string {
if t.err == nil {
return fmt.Sprintf("%q (line=%d, offset=%d)", t.value, t.line, t.offset)
}
return fmt.Sprintf("parse error: %v", t.err)
}
type textParser struct {
s string // remaining input
done bool // whether the parsing is finished (success or error)
backed bool // whether back() was called
offset, line int
cur token
}
func newTextParser(s string) *textParser {
p := new(textParser)
p.s = s
p.line = 1
p.cur.line = 1
return p
}
func (p *textParser) errorf(format string, a ...interface{}) *ParseError {
pe := &ParseError{fmt.Sprintf(format, a...), p.cur.line, p.cur.offset}
p.cur.err = pe
p.done = true
return pe
}
// Numbers and identifiers are matched by [-+._A-Za-z0-9]
func isIdentOrNumberChar(c byte) bool {
switch {
case 'A' <= c && c <= 'Z', 'a' <= c && c <= 'z':
return true
case '0' <= c && c <= '9':
return true
}
switch c {
case '-', '+', '.', '_':
return true
}
return false
}
func isWhitespace(c byte) bool {
switch c {
case ' ', '\t', '\n', '\r':
return true
}
return false
}
func isQuote(c byte) bool {
switch c {
case '"', '\'':
return true
}
return false
}
func (p *textParser) skipWhitespace() {
i := 0
for i < len(p.s) && (isWhitespace(p.s[i]) || p.s[i] == '#') {
if p.s[i] == '#' {
// comment; skip to end of line or input
for i < len(p.s) && p.s[i] != '\n' {
i++
}
if i == len(p.s) {
break
}
}
if p.s[i] == '\n' {
p.line++
}
i++
}
p.offset += i
p.s = p.s[i:len(p.s)]
if len(p.s) == 0 {
p.done = true
}
}
func (p *textParser) advance() {
// Skip whitespace
p.skipWhitespace()
if p.done {
return
}
// Start of non-whitespace
p.cur.err = nil
p.cur.offset, p.cur.line = p.offset, p.line
p.cur.unquoted = ""
switch p.s[0] {
case '<', '>', '{', '}', ':', '[', ']', ';', ',', '/':
// Single symbol
p.cur.value, p.s = p.s[0:1], p.s[1:len(p.s)]
case '"', '\'':
// Quoted string
i := 1
for i < len(p.s) && p.s[i] != p.s[0] && p.s[i] != '\n' {
if p.s[i] == '\\' && i+1 < len(p.s) {
// skip escaped char
i++
}
i++
}
if i >= len(p.s) || p.s[i] != p.s[0] {
p.errorf("unmatched quote")
return
}
unq, err := unquoteC(p.s[1:i], rune(p.s[0]))
if err != nil {
p.errorf("invalid quoted string %s: %v", p.s[0:i+1], err)
return
}
p.cur.value, p.s = p.s[0:i+1], p.s[i+1:len(p.s)]
p.cur.unquoted = unq
default:
i := 0
for i < len(p.s) && isIdentOrNumberChar(p.s[i]) {
i++
}
if i == 0 {
p.errorf("unexpected byte %#x", p.s[0])
return
}
p.cur.value, p.s = p.s[0:i], p.s[i:len(p.s)]
}
p.offset += len(p.cur.value)
}
var (
errBadUTF8 = errors.New("proto: bad UTF-8")
errBadHex = errors.New("proto: bad hexadecimal")
)
func unquoteC(s string, quote rune) (string, error) {
// This is based on C++'s tokenizer.cc.
// Despite its name, this is *not* parsing C syntax.
// For instance, "\0" is an invalid quoted string.
// Avoid allocation in trivial cases.
simple := true
for _, r := range s {
if r == '\\' || r == quote {
simple = false
break
}
}
if simple {
return s, nil
}
buf := make([]byte, 0, 3*len(s)/2)
for len(s) > 0 {
r, n := utf8.DecodeRuneInString(s)
if r == utf8.RuneError && n == 1 {
return "", errBadUTF8
}
s = s[n:]
if r != '\\' {
if r < utf8.RuneSelf {
buf = append(buf, byte(r))
} else {
buf = append(buf, string(r)...)
}
continue
}
ch, tail, err := unescape(s)
if err != nil {
return "", err
}
buf = append(buf, ch...)
s = tail
}
return string(buf), nil
}
func unescape(s string) (ch string, tail string, err error) {
r, n := utf8.DecodeRuneInString(s)
if r == utf8.RuneError && n == 1 {
return "", "", errBadUTF8
}
s = s[n:]
switch r {
case 'a':
return "\a", s, nil
case 'b':
return "\b", s, nil
case 'f':
return "\f", s, nil
case 'n':
return "\n", s, nil
case 'r':
return "\r", s, nil
case 't':
return "\t", s, nil
case 'v':
return "\v", s, nil
case '?':
return "?", s, nil // trigraph workaround
case '\'', '"', '\\':
return string(r), s, nil
case '0', '1', '2', '3', '4', '5', '6', '7', 'x', 'X':
if len(s) < 2 {
return "", "", fmt.Errorf(`\%c requires 2 following digits`, r)
}
base := 8
ss := s[:2]
s = s[2:]
if r == 'x' || r == 'X' {
base = 16
} else {
ss = string(r) + ss
}
i, err := strconv.ParseUint(ss, base, 8)
if err != nil {
return "", "", err
}
return string([]byte{byte(i)}), s, nil
case 'u', 'U':
n := 4
if r == 'U' {
n = 8
}
if len(s) < n {
return "", "", fmt.Errorf(`\%c requires %d digits`, r, n)
}
bs := make([]byte, n/2)
for i := 0; i < n; i += 2 {
a, ok1 := unhex(s[i])
b, ok2 := unhex(s[i+1])
if !ok1 || !ok2 {
return "", "", errBadHex
}
bs[i/2] = a<<4 | b
}
s = s[n:]
return string(bs), s, nil
}
return "", "", fmt.Errorf(`unknown escape \%c`, r)
}
// Adapted from src/pkg/strconv/quote.go.
func unhex(b byte) (v byte, ok bool) {
switch {
case '0' <= b && b <= '9':
return b - '0', true
case 'a' <= b && b <= 'f':
return b - 'a' + 10, true
case 'A' <= b && b <= 'F':
return b - 'A' + 10, true
}
return 0, false
}
// Back off the parser by one token. Can only be done between calls to next().
// It makes the next advance() a no-op.
func (p *textParser) back() { p.backed = true }
// Advances the parser and returns the new current token.
func (p *textParser) next() *token {
if p.backed || p.done {
p.backed = false
return &p.cur
}
p.advance()
if p.done {
p.cur.value = ""
} else if len(p.cur.value) > 0 && isQuote(p.cur.value[0]) {
// Look for multiple quoted strings separated by whitespace,
// and concatenate them.
cat := p.cur
for {
p.skipWhitespace()
if p.done || !isQuote(p.s[0]) {
break
}
p.advance()
if p.cur.err != nil {
return &p.cur
}
cat.value += " " + p.cur.value
cat.unquoted += p.cur.unquoted
}
p.done = false // parser may have seen EOF, but we want to return cat
p.cur = cat
}
return &p.cur
}
func (p *textParser) consumeToken(s string) error {
tok := p.next()
if tok.err != nil {
return tok.err
}
if tok.value != s {
p.back()
return p.errorf("expected %q, found %q", s, tok.value)
}
return nil
}
// Return a RequiredNotSetError indicating which required field was not set.
func (p *textParser) missingRequiredFieldError(sv reflect.Value) *RequiredNotSetError {
st := sv.Type()
sprops := GetProperties(st)
for i := 0; i < st.NumField(); i++ {
if !isNil(sv.Field(i)) {
continue
}
props := sprops.Prop[i]
if props.Required {
return &RequiredNotSetError{fmt.Sprintf("%v.%v", st, props.OrigName)}
}
}
return &RequiredNotSetError{fmt.Sprintf("%v.<unknown field name>", st)} // should not happen
}
// Returns the index in the struct for the named field, as well as the parsed tag properties.
func structFieldByName(sprops *StructProperties, name string) (int, *Properties, bool) {
i, ok := sprops.decoderOrigNames[name]
if ok {
return i, sprops.Prop[i], true
}
return -1, nil, false
}
// Consume a ':' from the input stream (if the next token is a colon),
// returning an error if a colon is needed but not present.
func (p *textParser) checkForColon(props *Properties, typ reflect.Type) *ParseError {
tok := p.next()
if tok.err != nil {
return tok.err
}
if tok.value != ":" {
// Colon is optional when the field is a group or message.
needColon := true
switch props.Wire {
case "group":
needColon = false
case "bytes":
// A "bytes" field is either a message, a string, or a repeated field;
// those three become *T, *string and []T respectively, so we can check for
// this field being a pointer to a non-string.
if typ.Kind() == reflect.Ptr {
// *T or *string
if typ.Elem().Kind() == reflect.String {
break
}
} else if typ.Kind() == reflect.Slice {
// []T or []*T
if typ.Elem().Kind() != reflect.Ptr {
break
}
} else if typ.Kind() == reflect.String {
// The proto3 exception is for a string field,
// which requires a colon.
break
}
needColon = false
}
if needColon {
return p.errorf("expected ':', found %q", tok.value)
}
p.back()
}
return nil
}
func (p *textParser) readStruct(sv reflect.Value, terminator string) error {
st := sv.Type()
sprops := GetProperties(st)
reqCount := sprops.reqCount
var reqFieldErr error
fieldSet := make(map[string]bool)
// A struct is a sequence of "name: value", terminated by one of
// '>' or '}', or the end of the input. A name may also be
// "[extension]" or "[type/url]".
//
// The whole struct can also be an expanded Any message, like:
// [type/url] < ... struct contents ... >
for {
tok := p.next()
if tok.err != nil {
return tok.err
}
if tok.value == terminator {
break
}
if tok.value == "[" {
// Looks like an extension or an Any.
//
// TODO: Check whether we need to handle
// namespace rooted names (e.g. ".something.Foo").
extName, err := p.consumeExtName()
if err != nil {
return err
}
if s := strings.LastIndex(extName, "/"); s >= 0 {
// If it contains a slash, it's an Any type URL.
messageName := extName[s+1:]
mt := MessageType(messageName)
if mt == nil {
return p.errorf("unrecognized message %q in google.protobuf.Any", messageName)
}
tok = p.next()
if tok.err != nil {
return tok.err
}
// consume an optional colon
if tok.value == ":" {
tok = p.next()
if tok.err != nil {
return tok.err
}
}
var terminator string
switch tok.value {
case "<":
terminator = ">"
case "{":
terminator = "}"
default:
return p.errorf("expected '{' or '<', found %q", tok.value)
}
v := reflect.New(mt.Elem())
if pe := p.readStruct(v.Elem(), terminator); pe != nil {
return pe
}
b, err := Marshal(v.Interface().(Message))
if err != nil {
return p.errorf("failed to marshal message of type %q: %v", messageName, err)
}
if fieldSet["type_url"] {
return p.errorf(anyRepeatedlyUnpacked, "type_url")
}
if fieldSet["value"] {
return p.errorf(anyRepeatedlyUnpacked, "value")
}
sv.FieldByName("TypeUrl").SetString(extName)
sv.FieldByName("Value").SetBytes(b)
fieldSet["type_url"] = true
fieldSet["value"] = true
continue
}
var desc *ExtensionDesc
// This could be faster, but it's functional.
// TODO: Do something smarter than a linear scan.
for _, d := range RegisteredExtensions(reflect.New(st).Interface().(Message)) {
if d.Name == extName {
desc = d
break
}
}
if desc == nil {
return p.errorf("unrecognized extension %q", extName)
}
props := &Properties{}
props.Parse(desc.Tag)
typ := reflect.TypeOf(desc.ExtensionType)
if err := p.checkForColon(props, typ); err != nil {
return err
}
rep := desc.repeated()
// Read the extension structure, and set it in
// the value we're constructing.
var ext reflect.Value
if !rep {
ext = reflect.New(typ).Elem()
} else {
ext = reflect.New(typ.Elem()).Elem()
}
if err := p.readAny(ext, props); err != nil {
if _, ok := err.(*RequiredNotSetError); !ok {
return err
}
reqFieldErr = err
}
ep := sv.Addr().Interface().(Message)
if !rep {
SetExtension(ep, desc, ext.Interface())
} else {
old, err := GetExtension(ep, desc)
var sl reflect.Value
if err == nil {
sl = reflect.ValueOf(old) // existing slice
} else {
sl = reflect.MakeSlice(typ, 0, 1)
}
sl = reflect.Append(sl, ext)
SetExtension(ep, desc, sl.Interface())
}
if err := p.consumeOptionalSeparator(); err != nil {
return err
}
continue
}
// This is a normal, non-extension field.
name := tok.value
var dst reflect.Value
fi, props, ok := structFieldByName(sprops, name)
if ok {
dst = sv.Field(fi)
} else if oop, ok := sprops.OneofTypes[name]; ok {
// It is a oneof.
props = oop.Prop
nv := reflect.New(oop.Type.Elem())
dst = nv.Elem().Field(0)
field := sv.Field(oop.Field)
if !field.IsNil() {
return p.errorf("field '%s' would overwrite already parsed oneof '%s'", name, sv.Type().Field(oop.Field).Name)
}
field.Set(nv)
}
if !dst.IsValid() {
return p.errorf("unknown field name %q in %v", name, st)
}
if dst.Kind() == reflect.Map {
// Consume any colon.
if err := p.checkForColon(props, dst.Type()); err != nil {
return err
}
// Construct the map if it doesn't already exist.
if dst.IsNil() {
dst.Set(reflect.MakeMap(dst.Type()))
}
key := reflect.New(dst.Type().Key()).Elem()
val := reflect.New(dst.Type().Elem()).Elem()
// The map entry should be this sequence of tokens:
// < key : KEY value : VALUE >
// However, implementations may omit key or value, and technically
// we should support them in any order. See b/28924776 for a time
// this went wrong.
tok := p.next()
var terminator string
switch tok.value {
case "<":
terminator = ">"
case "{":
terminator = "}"
default:
return p.errorf("expected '{' or '<', found %q", tok.value)
}
for {
tok := p.next()
if tok.err != nil {
return tok.err
}
if tok.value == terminator {
break
}
switch tok.value {
case "key":
if err := p.consumeToken(":"); err != nil {
return err
}
if err := p.readAny(key, props.mkeyprop); err != nil {
return err
}
if err := p.consumeOptionalSeparator(); err != nil {
return err
}
case "value":
if err := p.checkForColon(props.mvalprop, dst.Type().Elem()); err != nil {
return err
}
if err := p.readAny(val, props.mvalprop); err != nil {
return err
}
if err := p.consumeOptionalSeparator(); err != nil {
return err
}
default:
p.back()
return p.errorf(`expected "key", "value", or %q, found %q`, terminator, tok.value)
}
}
dst.SetMapIndex(key, val)
continue
}
// Check that it's not already set if it's not a repeated field.
if !props.Repeated && fieldSet[name] {
return p.errorf("non-repeated field %q was repeated", name)
}
if err := p.checkForColon(props, dst.Type()); err != nil {
return err
}
// Parse into the field.
fieldSet[name] = true
if err := p.readAny(dst, props); err != nil {
if _, ok := err.(*RequiredNotSetError); !ok {
return err
}
reqFieldErr = err
}
if props.Required {
reqCount--
}
if err := p.consumeOptionalSeparator(); err != nil {
return err
}
}
if reqCount > 0 {
return p.missingRequiredFieldError(sv)
}
return reqFieldErr
}
// consumeExtName consumes extension name or expanded Any type URL and the
// following ']'. It returns the name or URL consumed.
func (p *textParser) consumeExtName() (string, error) {
tok := p.next()
if tok.err != nil {
return "", tok.err
}
// If extension name or type url is quoted, it's a single token.
if len(tok.value) > 2 && isQuote(tok.value[0]) && tok.value[len(tok.value)-1] == tok.value[0] {
name, err := unquoteC(tok.value[1:len(tok.value)-1], rune(tok.value[0]))
if err != nil {
return "", err
}
return name, p.consumeToken("]")
}
// Consume everything up to "]"
var parts []string
for tok.value != "]" {
parts = append(parts, tok.value)
tok = p.next()
if tok.err != nil {
return "", p.errorf("unrecognized type_url or extension name: %s", tok.err)
}
}
return strings.Join(parts, ""), nil
}
// consumeOptionalSeparator consumes an optional semicolon or comma.
// It is used in readStruct to provide backward compatibility.
func (p *textParser) consumeOptionalSeparator() error {
tok := p.next()
if tok.err != nil {
return tok.err
}
if tok.value != ";" && tok.value != "," {
p.back()
}
return nil
}
func (p *textParser) readAny(v reflect.Value, props *Properties) error {
tok := p.next()
if tok.err != nil {
return tok.err
}
if tok.value == "" {
return p.errorf("unexpected EOF")
}
switch fv := v; fv.Kind() {
case reflect.Slice:
at := v.Type()
if at.Elem().Kind() == reflect.Uint8 {
// Special case for []byte
if tok.value[0] != '"' && tok.value[0] != '\'' {
// Deliberately written out here, as the error after
// this switch statement would write "invalid []byte: ...",
// which is not as user-friendly.
return p.errorf("invalid string: %v", tok.value)
}
bytes := []byte(tok.unquoted)
fv.Set(reflect.ValueOf(bytes))
return nil
}
// Repeated field.
if tok.value == "[" {
// Repeated field with list notation, like [1,2,3].
for {
fv.Set(reflect.Append(fv, reflect.New(at.Elem()).Elem()))
err := p.readAny(fv.Index(fv.Len()-1), props)
if err != nil {
return err
}
tok := p.next()
if tok.err != nil {
return tok.err
}
if tok.value == "]" {
break
}
if tok.value != "," {
return p.errorf("Expected ']' or ',' found %q", tok.value)
}
}
return nil
}
// One value of the repeated field.
p.back()
fv.Set(reflect.Append(fv, reflect.New(at.Elem()).Elem()))
return p.readAny(fv.Index(fv.Len()-1), props)
case reflect.Bool:
// true/1/t/True or false/f/0/False.
switch tok.value {
case "true", "1", "t", "True":
fv.SetBool(true)
return nil
case "false", "0", "f", "False":
fv.SetBool(false)
return nil
}
case reflect.Float32, reflect.Float64:
v := tok.value
// Ignore 'f' for compatibility with output generated by C++, but don't
// remove 'f' when the value is "-inf" or "inf".
if strings.HasSuffix(v, "f") && tok.value != "-inf" && tok.value != "inf" {
v = v[:len(v)-1]
}
if f, err := strconv.ParseFloat(v, fv.Type().Bits()); err == nil {
fv.SetFloat(f)
return nil
}
case reflect.Int32:
if x, err := strconv.ParseInt(tok.value, 0, 32); err == nil {
fv.SetInt(x)
return nil
}
if len(props.Enum) == 0 {
break
}
m, ok := enumValueMaps[props.Enum]
if !ok {
break
}
x, ok := m[tok.value]
if !ok {
break
}
fv.SetInt(int64(x))
return nil
case reflect.Int64:
if x, err := strconv.ParseInt(tok.value, 0, 64); err == nil {
fv.SetInt(x)
return nil
}
case reflect.Ptr:
// A basic field (indirected through pointer), or a repeated message/group
p.back()
fv.Set(reflect.New(fv.Type().Elem()))
return p.readAny(fv.Elem(), props)
case reflect.String:
if tok.value[0] == '"' || tok.value[0] == '\'' {
fv.SetString(tok.unquoted)
return nil
}
case reflect.Struct:
var terminator string
switch tok.value {
case "{":
terminator = "}"
case "<":
terminator = ">"
default:
return p.errorf("expected '{' or '<', found %q", tok.value)
}
// TODO: Handle nested messages which implement encoding.TextUnmarshaler.
return p.readStruct(fv, terminator)
case reflect.Uint32:
if x, err := strconv.ParseUint(tok.value, 0, 32); err == nil {
fv.SetUint(uint64(x))
return nil
}
case reflect.Uint64:
if x, err := strconv.ParseUint(tok.value, 0, 64); err == nil {
fv.SetUint(x)
return nil
}
}
return p.errorf("invalid %v: %v", v.Type(), tok.value)
}
// UnmarshalText reads a protocol buffer in Text format. UnmarshalText resets pb
// before starting to unmarshal, so any existing data in pb is always removed.
// If a required field is not set and no other error occurs,
// UnmarshalText returns *RequiredNotSetError.
func UnmarshalText(s string, pb Message) error {
if um, ok := pb.(encoding.TextUnmarshaler); ok {
err := um.UnmarshalText([]byte(s))
return err
}
pb.Reset()
v := reflect.ValueOf(pb)
if pe := newTextParser(s).readStruct(v.Elem(), ""); pe != nil {
return pe
}
return nil
}

5
vendor/github.com/yawning/bulb/.gitignore generated vendored
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@ -1,5 +0,0 @@
*.swp
*~
examples/basic/basic
examples/listener/listener
examples/dialer/dialer

122
vendor/github.com/yawning/bulb/LICENSE generated vendored
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@ -1,122 +0,0 @@
Creative Commons Legal Code
CC0 1.0 Universal
CREATIVE COMMONS CORPORATION IS NOT A LAW FIRM AND DOES NOT PROVIDE
LEGAL SERVICES. DISTRIBUTION OF THIS DOCUMENT DOES NOT CREATE AN
ATTORNEY-CLIENT RELATIONSHIP. CREATIVE COMMONS PROVIDES THIS
INFORMATION ON AN "AS-IS" BASIS. CREATIVE COMMONS MAKES NO WARRANTIES
REGARDING THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS
PROVIDED HEREUNDER, AND DISCLAIMS LIABILITY FOR DAMAGES RESULTING FROM
THE USE OF THIS DOCUMENT OR THE INFORMATION OR WORKS PROVIDED
HEREUNDER.
Statement of Purpose
The laws of most jurisdictions throughout the world automatically confer
exclusive Copyright and Related Rights (defined below) upon the creator
and subsequent owner(s) (each and all, an "owner") of an original work of
authorship and/or a database (each, a "Work").
Certain owners wish to permanently relinquish those rights to a Work for
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scientific works ("Commons") that the public can reliably and without fear
of later claims of infringement build upon, modify, incorporate in other
works, reuse and redistribute as freely as possible in any form whatsoever
and for any purposes, including without limitation commercial purposes.
These owners may contribute to the Commons to promote the ideal of a free
culture and the further production of creative, cultural and scientific
works, or to gain reputation or greater distribution for their Work in
part through the use and efforts of others.
For these and/or other purposes and motivations, and without any
expectation of additional consideration or compensation, the person
associating CC0 with a Work (the "Affirmer"), to the extent that he or she
is an owner of Copyright and Related Rights in the Work, voluntarily
elects to apply CC0 to the Work and publicly distribute the Work under its
terms, with knowledge of his or her Copyright and Related Rights in the
Work and the meaning and intended legal effect of CC0 on those rights.
1. Copyright and Related Rights. A Work made available under CC0 may be
protected by copyright and related or neighboring rights ("Copyright and
Related Rights"). Copyright and Related Rights include, but are not
limited to, the following:
i. the right to reproduce, adapt, distribute, perform, display,
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ii. moral rights retained by the original author(s) and/or performer(s);
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subject to the limitations in paragraph 4(a), below;
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in a Work;
vi. database rights (such as those arising under Directive 96/9/EC of the
European Parliament and of the Council of 11 March 1996 on the legal
protection of databases, and under any national implementation
thereof, including any amended or successor version of such
directive); and
vii. other similar, equivalent or corresponding rights throughout the
world based on applicable law or treaty, and any national
implementations thereof.
2. Waiver. To the greatest extent permitted by, but not in contravention
of, applicable law, Affirmer hereby overtly, fully, permanently,
irrevocably and unconditionally waives, abandons, and surrenders all of
Affirmer's Copyright and Related Rights and associated claims and causes
of action, whether now known or unknown (including existing as well as
future claims and causes of action), in the Work (i) in all territories
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treaty (including future time extensions), (iii) in any current or future
medium and for any number of copies, and (iv) for any purpose whatsoever,
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purposes (the "Waiver"). Affirmer makes the Waiver for the benefit of each
member of the public at large and to the detriment of Affirmer's heirs and
successors, fully intending that such Waiver shall not be subject to
revocation, rescission, cancellation, termination, or any other legal or
equitable action to disrupt the quiet enjoyment of the Work by the public
as contemplated by Affirmer's express Statement of Purpose.
3. Public License Fallback. Should any part of the Waiver for any reason
be judged legally invalid or ineffective under applicable law, then the
Waiver shall be preserved to the maximum extent permitted taking into
account Affirmer's express Statement of Purpose. In addition, to the
extent the Waiver is so judged Affirmer hereby grants to each affected
person a royalty-free, non transferable, non sublicensable, non exclusive,
irrevocable and unconditional license to exercise Affirmer's Copyright and
Related Rights in the Work (i) in all territories worldwide, (ii) for the
maximum duration provided by applicable law or treaty (including future
time extensions), (iii) in any current or future medium and for any number
of copies, and (iv) for any purpose whatsoever, including without
limitation commercial, advertising or promotional purposes (the
"License"). The License shall be deemed effective as of the date CC0 was
applied by Affirmer to the Work. Should any part of the License for any
reason be judged legally invalid or ineffective under applicable law, such
partial invalidity or ineffectiveness shall not invalidate the remainder
of the License, and in such case Affirmer hereby affirms that he or she
will not (i) exercise any of his or her remaining Copyright and Related
Rights in the Work or (ii) assert any associated claims and causes of
action with respect to the Work, in either case contrary to Affirmer's
express Statement of Purpose.
4. Limitations and Disclaimers.
a. No trademark or patent rights held by Affirmer are waived, abandoned,
surrendered, licensed or otherwise affected by this document.
b. Affirmer offers the Work as-is and makes no representations or
warranties of any kind concerning the Work, express, implied,
statutory or otherwise, including without limitation warranties of
title, merchantability, fitness for a particular purpose, non
infringement, or the absence of latent or other defects, accuracy, or
the present or absence of errors, whether or not discoverable, all to
the greatest extent permissible under applicable law.
c. Affirmer disclaims responsibility for clearing rights of other persons
that may apply to the Work or any use thereof, including without
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Further, Affirmer disclaims responsibility for obtaining any necessary
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d. Affirmer understands and acknowledges that Creative Commons is not a
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this CC0 or use of the Work.

18
vendor/github.com/yawning/bulb/README.md generated vendored
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@ -1,18 +0,0 @@
## bulb - Is not stem
### Yawning Angel (yawning at torproject dot org)
bulb is a Go language interface to the Tor control port. It is considerably
lighter in functionality than stem and other controller libraries, and is
intended to be used in combination with`control-spec.txt`.
It was written primarily as a not-invented-here hack, and the base interface is
more than likely to stay fairly low level, though useful helpers will be added
as I need them.
Things you should probably use instead:
* [stem](https://stem.torproject.org)
* [txtorcon](https://pypi.python.org/pypi/txtorcon)
* [orc](https://github.com/sycamoreone/orc)
Bugs:
* bulb does not send the 'QUIT' command before closing the connection.

137
vendor/github.com/yawning/bulb/cmd_authenticate.go generated vendored
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@ -1,137 +0,0 @@
// cmd_authenticate.go - AUTHENTICATE/AUTHCHALLENGE commands.
//
// To the extent possible under law, Yawning Angel waived all copyright
// and related or neighboring rights to bulb, using the creative
// commons "cc0" public domain dedication. See LICENSE or
// <http://creativecommons.org/publicdomain/zero/1.0/> for full details.
package bulb
import (
"crypto/hmac"
"crypto/rand"
"crypto/sha256"
"encoding/hex"
"io/ioutil"
"strings"
)
// Authenticate authenticates with the Tor instance using the "best" possible
// authentication method. The password argument is entirely optional, and will
// only be used if the "SAFECOOKE" and "NULL" authentication methods are not
// available and "HASHEDPASSWORD" is.
func (c *Conn) Authenticate(password string) error {
if c.isAuthenticated {
return nil
}
// Determine the supported authentication methods, and the cookie path.
pi, err := c.ProtocolInfo()
if err != nil {
return err
}
// "COOKIE" authentication exists, but anything modern supports
// "SAFECOOKIE".
const (
cmdAuthenticate = "AUTHENTICATE"
authMethodNull = "NULL"
authMethodPassword = "HASHEDPASSWORD"
authMethodSafeCookie = "SAFECOOKIE"
)
if pi.AuthMethods[authMethodNull] {
_, err = c.Request(cmdAuthenticate)
c.isAuthenticated = err == nil
return err
} else if pi.AuthMethods[authMethodSafeCookie] {
const (
authCookieLength = 32
authNonceLength = 32
authHashLength = 32
authServerHashKey = "Tor safe cookie authentication server-to-controller hash"
authClientHashKey = "Tor safe cookie authentication controller-to-server hash"
)
if pi.CookieFile == "" {
return newProtocolError("invalid (empty) COOKIEFILE")
}
cookie, err := ioutil.ReadFile(pi.CookieFile)
if err != nil {
return newProtocolError("failed to read COOKIEFILE: %v", err)
} else if len(cookie) != authCookieLength {
return newProtocolError("invalid cookie file length: %d", len(cookie))
}
// Send an AUTHCHALLENGE command, and parse the response.
var clientNonce [authNonceLength]byte
if _, err := rand.Read(clientNonce[:]); err != nil {
return newProtocolError("failed to generate clientNonce: %v", err)
}
clientNonceStr := hex.EncodeToString(clientNonce[:])
resp, err := c.Request("AUTHCHALLENGE %s %s", authMethodSafeCookie, clientNonceStr)
if err != nil {
return err
}
splitResp := strings.Split(resp.Reply, " ")
if len(splitResp) != 3 {
return newProtocolError("invalid AUTHCHALLENGE response")
}
serverHashStr := strings.TrimPrefix(splitResp[1], "SERVERHASH=")
if serverHashStr == splitResp[1] {
return newProtocolError("missing SERVERHASH")
}
serverHash, err := hex.DecodeString(serverHashStr)
if err != nil {
return newProtocolError("failed to decode ServerHash: %v", err)
}
if len(serverHash) != authHashLength {
return newProtocolError("invalid ServerHash length: %d", len(serverHash))
}
serverNonceStr := strings.TrimPrefix(splitResp[2], "SERVERNONCE=")
if serverNonceStr == splitResp[2] {
return newProtocolError("missing SERVERNONCE")
}
serverNonce, err := hex.DecodeString(serverNonceStr)
if err != nil {
return newProtocolError("failed to decode ServerNonce: %v", err)
}
if len(serverNonce) != authNonceLength {
return newProtocolError("invalid ServerNonce length: %d", len(serverNonce))
}
// Validate the ServerHash.
m := hmac.New(sha256.New, []byte(authServerHashKey))
m.Write(cookie)
m.Write(clientNonce[:])
m.Write(serverNonce)
dervServerHash := m.Sum(nil)
if !hmac.Equal(serverHash, dervServerHash) {
return newProtocolError("invalid ServerHash: mismatch")
}
// Calculate the ClientHash, and issue the AUTHENTICATE.
m = hmac.New(sha256.New, []byte(authClientHashKey))
m.Write(cookie)
m.Write(clientNonce[:])
m.Write(serverNonce)
clientHash := m.Sum(nil)
clientHashStr := hex.EncodeToString(clientHash)
_, err = c.Request("%s %s", cmdAuthenticate, clientHashStr)
c.isAuthenticated = err == nil
return err
} else if pi.AuthMethods[authMethodPassword] {
// Despite the name HASHEDPASSWORD, the raw password is actually sent.
// According to the code, this can either be a QuotedString, or base16
// encoded, so go with the later since it's easier to handle.
if password == "" {
return newProtocolError("password auth needs a password")
}
passwordStr := hex.EncodeToString([]byte(password))
_, err = c.Request("%s %s", cmdAuthenticate, passwordStr)
c.isAuthenticated = err == nil
return err
}
return newProtocolError("no supported authentication methods")
}

186
vendor/github.com/yawning/bulb/cmd_onion.go generated vendored
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@ -1,186 +0,0 @@
// cmd_onion.go - various onion service commands: ADD_ONION, DEL_ONION...
//
// To the extent possible under law, David Stainton and Ivan Markin waived
// all copyright and related or neighboring rights to this module of bulb,
// using the creative commons "cc0" public domain dedication. See LICENSE or
// <http://creativecommons.org/publicdomain/zero/1.0/> for full details.
package bulb
import (
"crypto"
"crypto/rsa"
"encoding/base64"
"fmt"
"strings"
"github.com/yawning/bulb/utils/pkcs1"
)
// OnionInfo is the result of the AddOnion command.
type OnionInfo struct {
OnionID string
PrivateKey crypto.PrivateKey
RawResponse *Response
}
// OnionPrivateKey is a unknown Onion private key (crypto.PublicKey).
type OnionPrivateKey struct {
KeyType string
Key string
}
// OnionPortSpec is a Onion VirtPort/Target pair.
type OnionPortSpec struct {
VirtPort uint16
Target string
}
// NewOnionConfig is a configuration for NewOnion command.
type NewOnionConfig struct {
PortSpecs []OnionPortSpec
PrivateKey crypto.PrivateKey
DiscardPK bool
Detach bool
BasicAuth bool
NonAnonymous bool
}
// NewOnion issues an ADD_ONION command using configuration config and
// returns the parsed response.
func (c *Conn) NewOnion(config *NewOnionConfig) (*OnionInfo, error) {
const keyTypeRSA = "RSA1024"
var err error
var portStr string
if config.PortSpecs == nil {
return nil, newProtocolError("invalid port specification")
}
for _, v := range config.PortSpecs {
portStr += fmt.Sprintf(" Port=%d", v.VirtPort)
if v.Target != "" {
portStr += "," + v.Target
}
}
var hsKeyType, hsKeyStr string
if config.PrivateKey != nil {
switch t := config.PrivateKey.(type) {
case *rsa.PrivateKey:
rsaPK, _ := config.PrivateKey.(*rsa.PrivateKey)
if rsaPK.N.BitLen() != 1024 {
return nil, newProtocolError("invalid RSA key size")
}
pkDER, err := pkcs1.EncodePrivateKeyDER(rsaPK)
if err != nil {
return nil, newProtocolError("failed to serialize RSA key: %v", err)
}
hsKeyType = keyTypeRSA
hsKeyStr = base64.StdEncoding.EncodeToString(pkDER)
case *OnionPrivateKey:
genericPK, _ := config.PrivateKey.(*OnionPrivateKey)
hsKeyType = genericPK.KeyType
hsKeyStr = genericPK.Key
default:
return nil, newProtocolError("unsupported private key type: %v", t)
}
} else {
hsKeyStr = "BEST"
hsKeyType = "NEW"
}
var flags []string
var flagsStr string
if config.DiscardPK {
flags = append(flags, "DiscardPK")
}
if config.Detach {
flags = append(flags, "Detach")
}
if config.BasicAuth {
flags = append(flags, "BasicAuth")
}
if config.NonAnonymous {
flags = append(flags, "NonAnonymous")
}
if flags != nil {
flagsStr = " Flags="
flagsStr += strings.Join(flags, ",")
}
request := fmt.Sprintf("ADD_ONION %s:%s%s%s", hsKeyType, hsKeyStr, portStr, flagsStr)
resp, err := c.Request(request)
if err != nil {
return nil, err
}
// Parse out the response.
var serviceID string
var hsPrivateKey crypto.PrivateKey
for _, l := range resp.Data {
const (
serviceIDPrefix = "ServiceID="
privateKeyPrefix = "PrivateKey="
)
if strings.HasPrefix(l, serviceIDPrefix) {
serviceID = strings.TrimPrefix(l, serviceIDPrefix)
} else if strings.HasPrefix(l, privateKeyPrefix) {
if config.DiscardPK || hsKeyStr != "" {
return nil, newProtocolError("received an unexpected private key")
}
hsKeyStr = strings.TrimPrefix(l, privateKeyPrefix)
splitKey := strings.SplitN(hsKeyStr, ":", 2)
if len(splitKey) != 2 {
return nil, newProtocolError("failed to parse private key type")
}
switch splitKey[0] {
case keyTypeRSA:
keyBlob, err := base64.StdEncoding.DecodeString(splitKey[1])
if err != nil {
return nil, newProtocolError("failed to base64 decode RSA key: %v", err)
}
hsPrivateKey, _, err = pkcs1.DecodePrivateKeyDER(keyBlob)
if err != nil {
return nil, newProtocolError("failed to deserialize RSA key: %v", err)
}
default:
hsPrivateKey := new(OnionPrivateKey)
hsPrivateKey.KeyType = splitKey[0]
hsPrivateKey.Key = splitKey[1]
}
}
}
if serviceID == "" {
// This should *NEVER* happen, since the command succeded, and the spec
// guarantees that this will always be present.
return nil, newProtocolError("failed to determine service ID")
}
oi := new(OnionInfo)
oi.RawResponse = resp
oi.OnionID = serviceID
oi.PrivateKey = hsPrivateKey
return oi, nil
}
// [DEPRECATED] AddOnion issues an ADD_ONION command and
// returns the parsed response.
func (c *Conn) AddOnion(ports []OnionPortSpec, key crypto.PrivateKey, oneshot bool) (*OnionInfo, error) {
cfg := &NewOnionConfig{}
cfg.PortSpecs = ports
if key != nil {
cfg.PrivateKey = key
}
cfg.DiscardPK = oneshot
return c.NewOnion(cfg)
}
// DeleteOnion issues a DEL_ONION command and returns the parsed response.
func (c *Conn) DeleteOnion(serviceID string) error {
_, err := c.Request("DEL_ONION %s", serviceID)
return err
}

95
vendor/github.com/yawning/bulb/cmd_protocolinfo.go generated vendored
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@ -1,95 +0,0 @@
// cmd_protocolinfo.go - PROTOCOLINFO command.
//
// To the extent possible under law, Yawning Angel waived all copyright
// and related or neighboring rights to bulb, using the creative
// commons "cc0" public domain dedication. See LICENSE or
// <http://creativecommons.org/publicdomain/zero/1.0/> for full details.
package bulb
import (
"strconv"
"strings"
"github.com/yawning/bulb/utils"
)
// ProtocolInfo is the result of the ProtocolInfo command.
type ProtocolInfo struct {
AuthMethods map[string]bool
CookieFile string
TorVersion string
RawResponse *Response
}
// ProtocolInfo issues a PROTOCOLINFO command and returns the parsed response.
func (c *Conn) ProtocolInfo() (*ProtocolInfo, error) {
// In the pre-authentication state, only one PROTOCOLINFO command
// may be issued. Cache the value returned so that subsequent
// calls continue to work.
if !c.isAuthenticated && c.cachedPI != nil {
return c.cachedPI, nil
}
resp, err := c.Request("PROTOCOLINFO")
if err != nil {
return nil, err
}
// Parse out the PIVERSION to make sure it speaks something we understand.
if len(resp.Data) < 1 {
return nil, newProtocolError("missing PIVERSION")
}
switch resp.Data[0] {
case "1":
return nil, newProtocolError("invalid PIVERSION: '%s'", resp.Reply)
default:
}
// Parse out the rest of the lines.
pi := new(ProtocolInfo)
pi.RawResponse = resp
pi.AuthMethods = make(map[string]bool)
for i := 1; i < len(resp.Data); i++ {
splitLine := utils.SplitQuoted(resp.Data[i], '"', ' ')
switch splitLine[0] {
case "AUTH":
// Parse an AuthLine detailing how to authenticate.
if len(splitLine) < 2 {
continue
}
methods := strings.TrimPrefix(splitLine[1], "METHODS=")
if methods == splitLine[1] {
continue
}
for _, meth := range strings.Split(methods, ",") {
pi.AuthMethods[meth] = true
}
if len(splitLine) < 3 {
continue
}
cookiePath := strings.TrimPrefix(splitLine[2], "COOKIEFILE=")
if cookiePath == splitLine[2] {
continue
}
pi.CookieFile, _ = strconv.Unquote(cookiePath)
case "VERSION":
// Parse a VersionLine detailing the Tor version.
if len(splitLine) < 2 {
continue
}
torVersion := strings.TrimPrefix(splitLine[1], "Tor=")
if torVersion == splitLine[1] {
continue
}
pi.TorVersion, _ = strconv.Unquote(torVersion)
default: // MUST ignore unsupported InfoLines.
}
}
if !c.isAuthenticated {
c.cachedPI = pi
}
return pi, nil
}

233
vendor/github.com/yawning/bulb/conn.go generated vendored
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@ -1,233 +0,0 @@
// conn.go - Controller connection instance.
//
// To the extent possible under law, Yawning Angel waived all copyright
// and related or neighboring rights to bulb, using the creative
// commons "cc0" public domain dedication. See LICENSE or
// <http://creativecommons.org/publicdomain/zero/1.0/> for full details.
// Package bulb is a Go language interface to a Tor control port.
package bulb
import (
"errors"
gofmt "fmt"
"io"
"log"
"net"
"net/textproto"
"sync"
)
const (
maxEventBacklog = 16
maxResponseBacklog = 16
)
// ErrNoAsyncReader is the error returned when the asynchronous event handling
// is requested, but the helper go routine has not been started.
var ErrNoAsyncReader = errors.New("event requested without an async reader")
// Conn is a control port connection instance.
type Conn struct {
conn *textproto.Conn
isAuthenticated bool
debugLog bool
cachedPI *ProtocolInfo
asyncReaderLock sync.Mutex
asyncReaderRunning bool
eventChan chan *Response
respChan chan *Response
closeWg sync.WaitGroup
rdErrLock sync.Mutex
rdErr error
}
func (c *Conn) setRdErr(err error, force bool) {
c.rdErrLock.Lock()
defer c.rdErrLock.Unlock()
if c.rdErr == nil || force {
c.rdErr = err
}
}
func (c *Conn) getRdErr() error {
c.rdErrLock.Lock()
defer c.rdErrLock.Unlock()
return c.rdErr
}
func (c *Conn) isAsyncReaderRunning() bool {
c.asyncReaderLock.Lock()
defer c.asyncReaderLock.Unlock()
return c.asyncReaderRunning
}
func (c *Conn) asyncReader() {
for {
resp, err := c.ReadResponse()
if err != nil {
c.setRdErr(err, false)
break
}
if resp.IsAsync() {
c.eventChan <- resp
} else {
c.respChan <- resp
}
}
close(c.eventChan)
close(c.respChan)
c.closeWg.Done()
// In theory, we would lock and set asyncReaderRunning to false here, but
// once it's started, the only way it returns is if there is a catastrophic
// failure, or a graceful shutdown. Changing this will require redoing how
// Close() works.
}
// Debug enables/disables debug logging of control port chatter.
func (c *Conn) Debug(enable bool) {
c.debugLog = enable
}
// Close closes the connection.
func (c *Conn) Close() error {
c.asyncReaderLock.Lock()
defer c.asyncReaderLock.Unlock()
err := c.conn.Close()
if err != nil && c.asyncReaderRunning {
c.closeWg.Wait()
}
c.setRdErr(io.ErrClosedPipe, true)
return err
}
// StartAsyncReader starts the asynchronous reader go routine that allows
// asynchronous events to be handled. It must not be called simultaniously
// with Read, Request, or ReadResponse or undefined behavior will occur.
func (c *Conn) StartAsyncReader() {
c.asyncReaderLock.Lock()
defer c.asyncReaderLock.Unlock()
if c.asyncReaderRunning {
return
}
// Allocate the channels and kick off the read worker.
c.eventChan = make(chan *Response, maxEventBacklog)
c.respChan = make(chan *Response, maxResponseBacklog)
c.closeWg.Add(1)
go c.asyncReader()
c.asyncReaderRunning = true
}
// NextEvent returns the next asynchronous event received, blocking if
// neccecary. In order to enable asynchronous event handling, StartAsyncReader
// must be called first.
func (c *Conn) NextEvent() (*Response, error) {
if err := c.getRdErr(); err != nil {
return nil, err
}
if !c.isAsyncReaderRunning() {
return nil, ErrNoAsyncReader
}
resp, ok := <-c.eventChan
if resp != nil {
return resp, nil
} else if !ok {
return nil, io.ErrClosedPipe
}
panic("BUG: NextEvent() returned a nil response and error")
}
// Request sends a raw control port request and returns the response.
// If the async. reader is not currently running, events received while waiting
// for the response will be silently dropped. Calling Request simultaniously
// with StartAsyncReader, Read, Write, or ReadResponse will lead to undefined
// behavior.
func (c *Conn) Request(fmt string, args ...interface{}) (*Response, error) {
if err := c.getRdErr(); err != nil {
return nil, err
}
asyncResp := c.isAsyncReaderRunning()
if c.debugLog {
log.Printf("C: %s", gofmt.Sprintf(fmt, args...))
}
id, err := c.conn.Cmd(fmt, args...)
if err != nil {
return nil, err
}
c.conn.StartResponse(id)
defer c.conn.EndResponse(id)
var resp *Response
if asyncResp {
var ok bool
resp, ok = <-c.respChan
if resp == nil && !ok {
return nil, io.ErrClosedPipe
}
} else {
// Event handing requires the asyncReader() goroutine, try to get a
// response, while silently swallowing events.
for resp == nil || resp.IsAsync() {
resp, err = c.ReadResponse()
if err != nil {
return nil, err
}
}
}
if resp == nil {
panic("BUG: Request() returned a nil response and error")
}
if resp.IsOk() {
return resp, nil
}
return resp, resp.Err
}
// Read reads directly from the control port connection. Mixing this call
// with Request, ReadResponse, or asynchronous events will lead to undefined
// behavior.
func (c *Conn) Read(p []byte) (int, error) {
return c.conn.R.Read(p)
}
// Write writes directly from the control port connection. Mixing this call
// with Request will lead to undefined behavior.
func (c *Conn) Write(p []byte) (int, error) {
n, err := c.conn.W.Write(p)
if err == nil {
// If the write succeeds, but the flush fails, n will be incorrect...
return n, c.conn.W.Flush()
}
return n, err
}
// Dial connects to a given network/address and returns a new Conn for the
// connection.
func Dial(network, addr string) (*Conn, error) {
c, err := net.Dial(network, addr)
if err != nil {
return nil, err
}
return NewConn(c), nil
}
// NewConn returns a new Conn using c for I/O.
func NewConn(c io.ReadWriteCloser) *Conn {
conn := new(Conn)
conn.conn = textproto.NewConn(c)
return conn
}
func newProtocolError(fmt string, args ...interface{}) textproto.ProtocolError {
return textproto.ProtocolError(gofmt.Sprintf(fmt, args...))
}
var _ io.ReadWriteCloser = (*Conn)(nil)

54
vendor/github.com/yawning/bulb/dialer.go generated vendored
View File

@ -1,54 +0,0 @@
// dialer.go - Tor backed proxy.Dialer.
//
// To the extent possible under law, Yawning Angel waived all copyright
// and related or neighboring rights to bulb, using the creative
// commons "cc0" public domain dedication. See LICENSE or
// <http://creativecommons.org/publicdomain/zero/1.0/> for full details.
package bulb
import (
"strconv"
"strings"
"golang.org/x/net/proxy"
)
// Dialer returns a proxy.Dialer for the given Tor instance.
func (c *Conn) Dialer(auth *proxy.Auth) (proxy.Dialer, error) {
const (
cmdGetInfo = "GETINFO"
socksListeners = "net/listeners/socks"
unixPrefix = "unix:"
)
// Query for the SOCKS listeners via a GETINFO request.
resp, err := c.Request("%s %s", cmdGetInfo, socksListeners)
if err != nil {
return nil, err
}
if len(resp.Data) != 1 {
return nil, newProtocolError("no SOCKS listeners configured")
}
splitResp := strings.Split(resp.Data[0], " ")
if len(splitResp) < 1 {
return nil, newProtocolError("no SOCKS listeners configured")
}
// The first listener will have a "net/listeners/socks=" prefix, and all
// entries are QuotedStrings.
laddrStr := strings.TrimPrefix(splitResp[0], socksListeners+"=")
if laddrStr == splitResp[0] {
return nil, newProtocolError("failed to parse SOCKS listener")
}
laddrStr, _ = strconv.Unquote(laddrStr)
// Construct the proxyDialer.
if strings.HasPrefix(laddrStr, unixPrefix) {
unixPath := strings.TrimPrefix(laddrStr, unixPrefix)
return proxy.SOCKS5("unix", unixPath, auth, proxy.Direct)
}
return proxy.SOCKS5("tcp", laddrStr, auth, proxy.Direct)
}

116
vendor/github.com/yawning/bulb/listener.go generated vendored
View File

@ -1,116 +0,0 @@
// listener.go - Tor backed net.Listener.
//
// To the extent possible under law, Yawning Angel and Ivan Markin
// waived all copyright and related or neighboring rights to bulb, using
// the creative commons "cc0" public domain dedication. See LICENSE or
// <http://creativecommons.org/publicdomain/zero/1.0/> for full details.
package bulb
import (
"crypto"
"fmt"
"net"
"strconv"
)
type onionAddr struct {
info *OnionInfo
port uint16
}
func (a *onionAddr) Network() string {
return "tcp"
}
func (a *onionAddr) String() string {
return fmt.Sprintf("%s.onion:%d", a.info.OnionID, a.port)
}
type onionListener struct {
addr *onionAddr
ctrlConn *Conn
listener net.Listener
}
func (l *onionListener) Accept() (net.Conn, error) {
return l.listener.Accept()
}
func (l *onionListener) Close() (err error) {
if err = l.listener.Close(); err == nil {
// Only delete the onion once.
err = l.ctrlConn.DeleteOnion(l.addr.info.OnionID)
}
return err
}
func (l *onionListener) Addr() net.Addr {
return l.addr
}
// NewListener returns a net.Listener backed by an Onion Service using configuration
// config, optionally having Tor generate an ephemeral private key (config is nil or
// config.PrivateKey is nil).
// All of virtual ports specified in vports will be mapped to the port to which
// the underlying TCP listener binded. PortSpecs in config will be ignored since
// there is only one mapping for a vports set is possible.
func (c *Conn) NewListener(config *NewOnionConfig, vports ...uint16) (net.Listener, error) {
var cfg NewOnionConfig
if config == nil {
cfg = NewOnionConfig{
DiscardPK: true,
}
} else {
cfg = *config
}
const loopbackAddr = "127.0.0.1:0"
// Listen on the loopback interface.
tcpListener, err := net.Listen("tcp4", loopbackAddr)
if err != nil {
return nil, err
}
tAddr, ok := tcpListener.Addr().(*net.TCPAddr)
if !ok {
tcpListener.Close()
return nil, newProtocolError("failed to extract local port")
}
if len(vports) < 1 {
return nil, newProtocolError("no virual ports specified")
}
targetPortStr := strconv.FormatUint((uint64)(tAddr.Port), 10)
var portSpecs []OnionPortSpec
for _, vport := range vports {
portSpecs = append(portSpecs, OnionPortSpec{
VirtPort: vport,
Target: targetPortStr,
})
}
cfg.PortSpecs = portSpecs
// Create the onion.
oi, err := c.NewOnion(&cfg)
if err != nil {
tcpListener.Close()
return nil, err
}
oa := &onionAddr{info: oi, port: vports[0]}
ol := &onionListener{addr: oa, ctrlConn: c, listener: tcpListener}
return ol, nil
}
// [DEPRECATED] Listener returns a net.Listener backed by an Onion Service.
func (c *Conn) Listener(port uint16, key crypto.PrivateKey) (net.Listener, error) {
cfg := &NewOnionConfig{}
if key != nil {
cfg.PrivateKey = key
cfg.DiscardPK = false
} else {
cfg.DiscardPK = true
}
return c.NewListener(cfg, port)
}

125
vendor/github.com/yawning/bulb/response.go generated vendored
View File

@ -1,125 +0,0 @@
// response.go - Generic response handler
//
// To the extent possible under law, Yawning Angel waived all copyright
// and related or neighboring rights to bulb, using the creative
// commons "cc0" public domain dedication. See LICENSE or
// <http://creativecommons.org/publicdomain/zero/1.0/> for full details.
package bulb
import (
"log"
"net/textproto"
"strconv"
"strings"
)
// Response is a response to a control port command, or an asyncrhonous event.
type Response struct {
// Err is the status code and string representation associated with a
// response. Responses that have completed successfully will also have
// Err set to indicate such.
Err *textproto.Error
// Reply is the text on the EndReplyLine of the response.
Reply string
// Data is the MidReplyLines/DataReplyLines of the response. Dot encoded
// data is "decoded" and presented as a single string (terminal ".CRLF"
// removed, all intervening CRs stripped).
Data []string
// RawLines is all of the lines of a response, without CRLFs.
RawLines []string
}
// IsOk returns true if the response status code indicates success or
// an asynchronous event.
func (r *Response) IsOk() bool {
switch r.Err.Code {
case StatusOk, StatusOkUnneccecary, StatusAsyncEvent:
return true
default:
return false
}
}
// IsAsync returns true if the response is an asyncrhonous event.
func (r *Response) IsAsync() bool {
return r.Err.Code == StatusAsyncEvent
}
// ReadResponse returns the next response object. Calling this
// simultaniously with Read, Request, or StartAsyncReader will lead to
// undefined behavior
func (c *Conn) ReadResponse() (*Response, error) {
var resp *Response
var statusCode int
for {
line, err := c.conn.ReadLine()
if err != nil {
return nil, err
}
if c.debugLog {
log.Printf("S: %s", line)
}
// Parse the line that was just read.
if len(line) < 4 {
return nil, newProtocolError("truncated response: '%s'", line)
}
if code, err := strconv.Atoi(line[0:3]); err != nil {
return nil, newProtocolError("invalid status code: '%s'", line[0:3])
} else if code < 100 {
return nil, newProtocolError("invalid status code: '%s'", line[0:3])
} else if resp == nil {
resp = new(Response)
statusCode = code
} else if code != statusCode {
// The status code should stay fixed for all lines of the
// response, since events can't be interleaved with response
// lines.
return nil, newProtocolError("status code changed: %03d != %03d", code, statusCode)
}
if resp.RawLines == nil {
resp.RawLines = make([]string, 0, 1)
}
if line[3] == ' ' {
// Final line in the response.
resp.Reply = line[4:]
resp.Err = statusCodeToError(statusCode, resp.Reply)
resp.RawLines = append(resp.RawLines, line)
return resp, nil
}
if resp.Data == nil {
resp.Data = make([]string, 0, 1)
}
switch line[3] {
case '-':
// Continuation, keep reading.
resp.Data = append(resp.Data, line[4:])
resp.RawLines = append(resp.RawLines, line)
case '+':
// A "dot-encoded" payload follows.
resp.Data = append(resp.Data, line[4:])
resp.RawLines = append(resp.RawLines, line)
dotBody, err := c.conn.ReadDotBytes()
if err != nil {
return nil, err
}
if c.debugLog {
log.Printf("S: [dot encoded data]")
}
resp.Data = append(resp.Data, strings.TrimRight(string(dotBody), "\n\r"))
dotLines := strings.Split(string(dotBody), "\n")
for _, dotLine := range dotLines[:len(dotLines)-1] {
resp.RawLines = append(resp.RawLines, dotLine)
}
resp.RawLines = append(resp.RawLines, ".")
default:
return nil, newProtocolError("invalid separator: '%c'", line[3])
}
}
}

71
vendor/github.com/yawning/bulb/status.go generated vendored
View File

@ -1,71 +0,0 @@
// status.go - Status codes.
//
// To the extent possible under law, Yawning Angel waived all copyright
// and related or neighboring rights to bulb, using the creative
// commons "cc0" public domain dedication. See LICENSE or
// <http://creativecommons.org/publicdomain/zero/1.0/> for full details.
package bulb
import (
"fmt"
"strings"
"net/textproto"
)
// The various control port StatusCode constants.
const (
StatusOk = 250
StatusOkUnneccecary = 251
StatusErrResourceExhausted = 451
StatusErrSyntaxError = 500
StatusErrUnrecognizedCmd = 510
StatusErrUnimplementedCmd = 511
StatusErrSyntaxErrorArg = 512
StatusErrUnrecognizedCmdArg = 513
StatusErrAuthenticationRequired = 514
StatusErrBadAuthentication = 515
StatusErrUnspecifiedTorError = 550
StatusErrInternalError = 551
StatusErrUnrecognizedEntity = 552
StatusErrInvalidConfigValue = 553
StatusErrInvalidDescriptor = 554
StatusErrUnmanagedEntity = 555
StatusAsyncEvent = 650
)
var statusCodeStringMap = map[int]string{
StatusOk: "OK",
StatusOkUnneccecary: "Operation was unnecessary",
StatusErrResourceExhausted: "Resource exhausted",
StatusErrSyntaxError: "Syntax error: protocol",
StatusErrUnrecognizedCmd: "Unrecognized command",
StatusErrUnimplementedCmd: "Unimplemented command",
StatusErrSyntaxErrorArg: "Syntax error in command argument",
StatusErrUnrecognizedCmdArg: "Unrecognized command argument",
StatusErrAuthenticationRequired: "Authentication required",
StatusErrBadAuthentication: "Bad authentication",
StatusErrUnspecifiedTorError: "Unspecified Tor error",
StatusErrInternalError: "Internal error",
StatusErrUnrecognizedEntity: "Unrecognized entity",
StatusErrInvalidConfigValue: "Invalid configuration value",
StatusErrInvalidDescriptor: "Invalid descriptor",
StatusErrUnmanagedEntity: "Unmanaged entity",
StatusAsyncEvent: "Asynchronous event notification",
}
func statusCodeToError(code int, reply string) *textproto.Error {
err := new(textproto.Error)
err.Code = code
if msg, ok := statusCodeStringMap[code]; ok {
trimmedReply := strings.TrimSpace(strings.TrimPrefix(reply, msg))
err.Msg = fmt.Sprintf("%s: %s", msg, trimmedReply)
} else {
err.Msg = fmt.Sprintf("Unknown status code (%03d): %s", code, reply)
}
return err
}

101
vendor/github.com/yawning/bulb/utils/pkcs1/rsa.go generated vendored
View File

@ -1,101 +0,0 @@
//
// rsa.go - PKCS#1 RSA key related helpers.
//
// To the extent possible under law, Yawning Angel has waived all copyright and
// related or neighboring rights to bulb, using the creative commons
// "cc0" public domain dedication. See LICENSE or
// <http://creativecommons.org/publicdomain/zero/1.0/> for full details.
// Package pkcs1 implements PKCS#1 RSA key marshalling/unmarshalling,
// compatibile with Tor's usage.
package pkcs1
import (
"crypto/rsa"
"crypto/sha1"
"encoding/asn1"
"encoding/base32"
"math/big"
"strings"
)
type pkcs1RSAPrivKey struct {
Version int // version
N *big.Int // modulus
E int // publicExponent
D *big.Int // privateExponent
P *big.Int // prime1
Q *big.Int // prime2
Dp *big.Int // exponent1: d mod (p-1)
Dq *big.Int // exponent2: d mod (q-1)
Qinv *big.Int // coefficient: (inverse of q) mod p
}
// EncodePrivateKeyDER returns the PKCS#1 DER encoding of a rsa.PrivateKey.
func EncodePrivateKeyDER(sk *rsa.PrivateKey) ([]byte, error) {
// The crypto.RSA structure has a slightly different layout than PKCS#1
// private keys, so directly marshaling does not work. Pull out the values
// into a strucuture with the correct layout and marshal.
sk.Precompute() // Ensure that the structure is fully populated.
k := pkcs1RSAPrivKey{
Version: 0,
N: sk.N,
E: sk.E,
D: sk.D,
P: sk.Primes[0],
Q: sk.Primes[1],
Dp: sk.Precomputed.Dp,
Dq: sk.Precomputed.Dq,
Qinv: sk.Precomputed.Qinv,
}
return asn1.Marshal(k)
}
// DecodePrivateKeyDER returns the rsa.PrivateKey decoding of a PKCS#1 DER blob.
func DecodePrivateKeyDER(b []byte) (*rsa.PrivateKey, []byte, error) {
var k pkcs1RSAPrivKey
rest, err := asn1.Unmarshal(b, &k)
if err == nil {
sk := &rsa.PrivateKey{}
sk.Primes = make([]*big.Int, 2)
sk.N = k.N
sk.E = k.E
sk.D = k.D
sk.Primes[0] = k.P
sk.Primes[1] = k.Q
// Ignore the precomputed values and just rederive them.
sk.Precompute()
return sk, rest, nil
}
return nil, rest, err
}
// EncodePublicKeyDER returns the PKCS#1 DER encoding of a rsa.PublicKey.
func EncodePublicKeyDER(pk *rsa.PublicKey) ([]byte, error) {
// The crypto.RSA structure is exactly the same as the PCKS#1 public keys,
// when the encoding/asn.1 marshaller is done with it.
//
// DER encoding of (SEQUENCE | INTEGER(n) | INTEGER(e))
return asn1.Marshal(*pk)
}
// DecodePublicKeyDER returns the rsa.PublicKey decoding of a PKCS#1 DER blob.
func DecodePublicKeyDER(b []byte) (*rsa.PublicKey, []byte, error) {
pk := &rsa.PublicKey{}
rest, err := asn1.Unmarshal(b, pk)
return pk, rest, err
}
// OnionAddr returns the Tor Onion Service address corresponding to a given
// rsa.PublicKey.
func OnionAddr(pk *rsa.PublicKey) (string, error) {
der, err := EncodePublicKeyDER(pk)
if err != nil {
return "", err
}
h := sha1.Sum(der)
hb32 := base32.StdEncoding.EncodeToString(h[:10])
return strings.ToLower(hb32), nil
}

81
vendor/github.com/yawning/bulb/utils/utils.go generated vendored
View File

@ -1,81 +0,0 @@
// utils.go - A grab bag of useful utilitiy functions.
//
// To the extent possible under law, Yawning Angel waived all copyright
// and related or neighboring rights to bulb, using the creative
// commons "cc0" public domain dedication. See LICENSE or
// <http://creativecommons.org/publicdomain/zero/1.0/> for full details.
// Package utils implements useful utilities for dealing with Tor and it's
// control port.
package utils
import (
"net"
"net/url"
"strconv"
)
// SplitQuoted splits s by sep if it is found outside substring
// quoted by quote.
func SplitQuoted(s string, quote, sep rune) (splitted []string) {
quoteFlag := false
NewSubstring:
for i, c := range s {
if c == quote {
quoteFlag = !quoteFlag
}
if c == sep && !quoteFlag {
splitted = append(splitted, s[:i])
s = s[i+1:]
goto NewSubstring
}
}
return append(splitted, s)
}
// ParseControlPortString parses a string representation of a control port
// address into a network/address string pair suitable for use with "dial".
//
// Valid string representations are:
// * tcp://address:port
// * unix://path
// * port (Translates to tcp://127.0.0.1:port)
func ParseControlPortString(raw string) (network, addr string, err error) {
// Try parsing it as a naked port.
if _, err = strconv.ParseUint(raw, 10, 16); err == nil {
raw = "tcp://127.0.0.1:" + raw
}
// Ok, parse/validate the URI.
uri, err := url.Parse(raw)
if err != nil {
return "", "", err
}
if uri.Opaque != "" || uri.RawQuery != "" || uri.Fragment != "" {
return "", "", net.InvalidAddrError("uri has Opaque/Query/Fragment")
}
switch uri.Scheme {
case "tcp":
if uri.Path != "" {
return "", "", net.InvalidAddrError("tcp uri has a path")
}
tcpAddr, err := net.ResolveTCPAddr(uri.Scheme, uri.Host)
if err != nil {
return "", "", err
}
if tcpAddr.Port == 0 {
return "", "", net.InvalidAddrError("tcp uri is missing a port")
}
return uri.Scheme, uri.Host, nil
case "unix":
if uri.Host != "" {
return "", "", net.InvalidAddrError("unix uri has a host")
}
_, err := net.ResolveUnixAddr(uri.Scheme, uri.Path)
if err != nil {
return "", "", err
}
return uri.Scheme, uri.Path, nil
}
return "", "", net.InvalidAddrError("unknown scheme: " + uri.Scheme)
}

3
vendor/golang.org/x/net/AUTHORS generated vendored
View File

@ -1,3 +0,0 @@
# This source code refers to The Go Authors for copyright purposes.
# The master list of authors is in the main Go distribution,
# visible at http://tip.golang.org/AUTHORS.

3
vendor/golang.org/x/net/CONTRIBUTORS generated vendored
View File

@ -1,3 +0,0 @@
# This source code was written by the Go contributors.
# The master list of contributors is in the main Go distribution,
# visible at http://tip.golang.org/CONTRIBUTORS.

27
vendor/golang.org/x/net/LICENSE generated vendored
View File

@ -1,27 +0,0 @@
Copyright (c) 2009 The Go Authors. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

22
vendor/golang.org/x/net/PATENTS generated vendored
View File

@ -1,22 +0,0 @@
Additional IP Rights Grant (Patents)
"This implementation" means the copyrightable works distributed by
Google as part of the Go project.
Google hereby grants to You a perpetual, worldwide, non-exclusive,
no-charge, royalty-free, irrevocable (except as stated in this section)
patent license to make, have made, use, offer to sell, sell, import,
transfer and otherwise run, modify and propagate the contents of this
implementation of Go, where such license applies only to those patent
claims, both currently owned or controlled by Google and acquired in
the future, licensable by Google that are necessarily infringed by this
implementation of Go. This grant does not include claims that would be
infringed only as a consequence of further modification of this
implementation. If you or your agent or exclusive licensee institute or
order or agree to the institution of patent litigation against any
entity (including a cross-claim or counterclaim in a lawsuit) alleging
that this implementation of Go or any code incorporated within this
implementation of Go constitutes direct or contributory patent
infringement, or inducement of patent infringement, then any patent
rights granted to you under this License for this implementation of Go
shall terminate as of the date such litigation is filed.

18
vendor/golang.org/x/net/proxy/direct.go generated vendored
View File

@ -1,18 +0,0 @@
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package proxy
import (
"net"
)
type direct struct{}
// Direct is a direct proxy: one that makes network connections directly.
var Direct = direct{}
func (direct) Dial(network, addr string) (net.Conn, error) {
return net.Dial(network, addr)
}

140
vendor/golang.org/x/net/proxy/per_host.go generated vendored
View File

@ -1,140 +0,0 @@
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package proxy
import (
"net"
"strings"
)
// A PerHost directs connections to a default Dialer unless the hostname
// requested matches one of a number of exceptions.
type PerHost struct {
def, bypass Dialer
bypassNetworks []*net.IPNet
bypassIPs []net.IP
bypassZones []string
bypassHosts []string
}
// NewPerHost returns a PerHost Dialer that directs connections to either
// defaultDialer or bypass, depending on whether the connection matches one of
// the configured rules.
func NewPerHost(defaultDialer, bypass Dialer) *PerHost {
return &PerHost{
def: defaultDialer,
bypass: bypass,
}
}
// Dial connects to the address addr on the given network through either
// defaultDialer or bypass.
func (p *PerHost) Dial(network, addr string) (c net.Conn, err error) {
host, _, err := net.SplitHostPort(addr)
if err != nil {
return nil, err
}
return p.dialerForRequest(host).Dial(network, addr)
}
func (p *PerHost) dialerForRequest(host string) Dialer {
if ip := net.ParseIP(host); ip != nil {
for _, net := range p.bypassNetworks {
if net.Contains(ip) {
return p.bypass
}
}
for _, bypassIP := range p.bypassIPs {
if bypassIP.Equal(ip) {
return p.bypass
}
}
return p.def
}
for _, zone := range p.bypassZones {
if strings.HasSuffix(host, zone) {
return p.bypass
}
if host == zone[1:] {
// For a zone "example.com", we match "example.com"
// too.
return p.bypass
}
}
for _, bypassHost := range p.bypassHosts {
if bypassHost == host {
return p.bypass
}
}
return p.def
}
// AddFromString parses a string that contains comma-separated values
// specifying hosts that should use the bypass proxy. Each value is either an
// IP address, a CIDR range, a zone (*.example.com) or a hostname
// (localhost). A best effort is made to parse the string and errors are
// ignored.
func (p *PerHost) AddFromString(s string) {
hosts := strings.Split(s, ",")
for _, host := range hosts {
host = strings.TrimSpace(host)
if len(host) == 0 {
continue
}
if strings.Contains(host, "/") {
// We assume that it's a CIDR address like 127.0.0.0/8
if _, net, err := net.ParseCIDR(host); err == nil {
p.AddNetwork(net)
}
continue
}
if ip := net.ParseIP(host); ip != nil {
p.AddIP(ip)
continue
}
if strings.HasPrefix(host, "*.") {
p.AddZone(host[1:])
continue
}
p.AddHost(host)
}
}
// AddIP specifies an IP address that will use the bypass proxy. Note that
// this will only take effect if a literal IP address is dialed. A connection
// to a named host will never match an IP.
func (p *PerHost) AddIP(ip net.IP) {
p.bypassIPs = append(p.bypassIPs, ip)
}
// AddNetwork specifies an IP range that will use the bypass proxy. Note that
// this will only take effect if a literal IP address is dialed. A connection
// to a named host will never match.
func (p *PerHost) AddNetwork(net *net.IPNet) {
p.bypassNetworks = append(p.bypassNetworks, net)
}
// AddZone specifies a DNS suffix that will use the bypass proxy. A zone of
// "example.com" matches "example.com" and all of its subdomains.
func (p *PerHost) AddZone(zone string) {
if strings.HasSuffix(zone, ".") {
zone = zone[:len(zone)-1]
}
if !strings.HasPrefix(zone, ".") {
zone = "." + zone
}
p.bypassZones = append(p.bypassZones, zone)
}
// AddHost specifies a hostname that will use the bypass proxy.
func (p *PerHost) AddHost(host string) {
if strings.HasSuffix(host, ".") {
host = host[:len(host)-1]
}
p.bypassHosts = append(p.bypassHosts, host)
}

94
vendor/golang.org/x/net/proxy/proxy.go generated vendored
View File

@ -1,94 +0,0 @@
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package proxy provides support for a variety of protocols to proxy network
// data.
package proxy
import (
"errors"
"net"
"net/url"
"os"
)
// A Dialer is a means to establish a connection.
type Dialer interface {
// Dial connects to the given address via the proxy.
Dial(network, addr string) (c net.Conn, err error)
}
// Auth contains authentication parameters that specific Dialers may require.
type Auth struct {
User, Password string
}
// FromEnvironment returns the dialer specified by the proxy related variables in
// the environment.
func FromEnvironment() Dialer {
allProxy := os.Getenv("all_proxy")
if len(allProxy) == 0 {
return Direct
}
proxyURL, err := url.Parse(allProxy)
if err != nil {
return Direct
}
proxy, err := FromURL(proxyURL, Direct)
if err != nil {
return Direct
}
noProxy := os.Getenv("no_proxy")
if len(noProxy) == 0 {
return proxy
}
perHost := NewPerHost(proxy, Direct)
perHost.AddFromString(noProxy)
return perHost
}
// proxySchemes is a map from URL schemes to a function that creates a Dialer
// from a URL with such a scheme.
var proxySchemes map[string]func(*url.URL, Dialer) (Dialer, error)
// RegisterDialerType takes a URL scheme and a function to generate Dialers from
// a URL with that scheme and a forwarding Dialer. Registered schemes are used
// by FromURL.
func RegisterDialerType(scheme string, f func(*url.URL, Dialer) (Dialer, error)) {
if proxySchemes == nil {
proxySchemes = make(map[string]func(*url.URL, Dialer) (Dialer, error))
}
proxySchemes[scheme] = f
}
// FromURL returns a Dialer given a URL specification and an underlying
// Dialer for it to make network requests.
func FromURL(u *url.URL, forward Dialer) (Dialer, error) {
var auth *Auth
if u.User != nil {
auth = new(Auth)
auth.User = u.User.Username()
if p, ok := u.User.Password(); ok {
auth.Password = p
}
}
switch u.Scheme {
case "socks5":
return SOCKS5("tcp", u.Host, auth, forward)
}
// If the scheme doesn't match any of the built-in schemes, see if it
// was registered by another package.
if proxySchemes != nil {
if f, ok := proxySchemes[u.Scheme]; ok {
return f(u, forward)
}
}
return nil, errors.New("proxy: unknown scheme: " + u.Scheme)
}

210
vendor/golang.org/x/net/proxy/socks5.go generated vendored
View File

@ -1,210 +0,0 @@
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package proxy
import (
"errors"
"io"
"net"
"strconv"
)
// SOCKS5 returns a Dialer that makes SOCKSv5 connections to the given address
// with an optional username and password. See RFC 1928.
func SOCKS5(network, addr string, auth *Auth, forward Dialer) (Dialer, error) {
s := &socks5{
network: network,
addr: addr,
forward: forward,
}
if auth != nil {
s.user = auth.User
s.password = auth.Password
}
return s, nil
}
type socks5 struct {
user, password string
network, addr string
forward Dialer
}
const socks5Version = 5
const (
socks5AuthNone = 0
socks5AuthPassword = 2
)
const socks5Connect = 1
const (
socks5IP4 = 1
socks5Domain = 3
socks5IP6 = 4
)
var socks5Errors = []string{
"",
"general failure",
"connection forbidden",
"network unreachable",
"host unreachable",
"connection refused",
"TTL expired",
"command not supported",
"address type not supported",
}
// Dial connects to the address addr on the network net via the SOCKS5 proxy.
func (s *socks5) Dial(network, addr string) (net.Conn, error) {
switch network {
case "tcp", "tcp6", "tcp4":
default:
return nil, errors.New("proxy: no support for SOCKS5 proxy connections of type " + network)
}
conn, err := s.forward.Dial(s.network, s.addr)
if err != nil {
return nil, err
}
closeConn := &conn
defer func() {
if closeConn != nil {
(*closeConn).Close()
}
}()
host, portStr, err := net.SplitHostPort(addr)
if err != nil {
return nil, err
}
port, err := strconv.Atoi(portStr)
if err != nil {
return nil, errors.New("proxy: failed to parse port number: " + portStr)
}
if port < 1 || port > 0xffff {
return nil, errors.New("proxy: port number out of range: " + portStr)
}
// the size here is just an estimate
buf := make([]byte, 0, 6+len(host))
buf = append(buf, socks5Version)
if len(s.user) > 0 && len(s.user) < 256 && len(s.password) < 256 {
buf = append(buf, 2 /* num auth methods */, socks5AuthNone, socks5AuthPassword)
} else {
buf = append(buf, 1 /* num auth methods */, socks5AuthNone)
}
if _, err := conn.Write(buf); err != nil {
return nil, errors.New("proxy: failed to write greeting to SOCKS5 proxy at " + s.addr + ": " + err.Error())
}
if _, err := io.ReadFull(conn, buf[:2]); err != nil {
return nil, errors.New("proxy: failed to read greeting from SOCKS5 proxy at " + s.addr + ": " + err.Error())
}
if buf[0] != 5 {
return nil, errors.New("proxy: SOCKS5 proxy at " + s.addr + " has unexpected version " + strconv.Itoa(int(buf[0])))
}
if buf[1] == 0xff {
return nil, errors.New("proxy: SOCKS5 proxy at " + s.addr + " requires authentication")
}
if buf[1] == socks5AuthPassword {
buf = buf[:0]
buf = append(buf, 1 /* password protocol version */)
buf = append(buf, uint8(len(s.user)))
buf = append(buf, s.user...)
buf = append(buf, uint8(len(s.password)))
buf = append(buf, s.password...)
if _, err := conn.Write(buf); err != nil {
return nil, errors.New("proxy: failed to write authentication request to SOCKS5 proxy at " + s.addr + ": " + err.Error())
}
if _, err := io.ReadFull(conn, buf[:2]); err != nil {
return nil, errors.New("proxy: failed to read authentication reply from SOCKS5 proxy at " + s.addr + ": " + err.Error())
}
if buf[1] != 0 {
return nil, errors.New("proxy: SOCKS5 proxy at " + s.addr + " rejected username/password")
}
}
buf = buf[:0]
buf = append(buf, socks5Version, socks5Connect, 0 /* reserved */)
if ip := net.ParseIP(host); ip != nil {
if ip4 := ip.To4(); ip4 != nil {
buf = append(buf, socks5IP4)
ip = ip4
} else {
buf = append(buf, socks5IP6)
}
buf = append(buf, ip...)
} else {
if len(host) > 255 {
return nil, errors.New("proxy: destination hostname too long: " + host)
}
buf = append(buf, socks5Domain)
buf = append(buf, byte(len(host)))
buf = append(buf, host...)
}
buf = append(buf, byte(port>>8), byte(port))
if _, err := conn.Write(buf); err != nil {
return nil, errors.New("proxy: failed to write connect request to SOCKS5 proxy at " + s.addr + ": " + err.Error())
}
if _, err := io.ReadFull(conn, buf[:4]); err != nil {
return nil, errors.New("proxy: failed to read connect reply from SOCKS5 proxy at " + s.addr + ": " + err.Error())
}
failure := "unknown error"
if int(buf[1]) < len(socks5Errors) {
failure = socks5Errors[buf[1]]
}
if len(failure) > 0 {
return nil, errors.New("proxy: SOCKS5 proxy at " + s.addr + " failed to connect: " + failure)
}
bytesToDiscard := 0
switch buf[3] {
case socks5IP4:
bytesToDiscard = net.IPv4len
case socks5IP6:
bytesToDiscard = net.IPv6len
case socks5Domain:
_, err := io.ReadFull(conn, buf[:1])
if err != nil {
return nil, errors.New("proxy: failed to read domain length from SOCKS5 proxy at " + s.addr + ": " + err.Error())
}
bytesToDiscard = int(buf[0])
default:
return nil, errors.New("proxy: got unknown address type " + strconv.Itoa(int(buf[3])) + " from SOCKS5 proxy at " + s.addr)
}
if cap(buf) < bytesToDiscard {
buf = make([]byte, bytesToDiscard)
} else {
buf = buf[:bytesToDiscard]
}
if _, err := io.ReadFull(conn, buf); err != nil {
return nil, errors.New("proxy: failed to read address from SOCKS5 proxy at " + s.addr + ": " + err.Error())
}
// Also need to discard the port number
if _, err := io.ReadFull(conn, buf[:2]); err != nil {
return nil, errors.New("proxy: failed to read port from SOCKS5 proxy at " + s.addr + ": " + err.Error())
}
closeConn = nil
return conn, nil
}