go-ricochet/connection/autoconnectionhandler.go

95 lines
3.3 KiB
Go

package connection
import (
"crypto/rsa"
"github.com/s-rah/go-ricochet/channels"
"github.com/s-rah/go-ricochet/utils"
"log"
)
// 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 ...
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) {
log.Printf("Got auth result %v %v", accepted, isKnownContact)
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{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()
log.Printf("Got Channel Handler")
return h, nil
}
return nil, utils.UnknownChannelTypeError
}