core: Load identity from config

Also, slightly refactor Ricochet to be an interface to get the various
top-level components, and let the implementation define it (such as
backend's RicochetCore RPC type)

backend/backend.go

@@ -23,12 +23,16 @@ func main() {
 		log.Fatalf("config error: %v", err)
 	}
 
-	ricochet := &RicochetCore{
-		Network: ricochet.CreateNetwork(),
-		Config:  config,
+	core := &RicochetCore{
+		config: config,
+	}
+	core.network = ricochet.CreateNetwork()
+	core.identity, err = ricochet.CreateIdentity(core)
+	if err != nil {
+		log.Fatalf("identity error: %v", err)
 	}
 
 	rpcServer := grpc.NewServer()
-	rpc.RegisterRicochetCoreServer(rpcServer, ricochet)
+	rpc.RegisterRicochetCoreServer(rpcServer, core)
 	rpcServer.Serve(listener)
 }

backend/rpc.go

@@ -8,12 +8,25 @@ import (
 	"log"
 )
 
+var NotImplementedError error = errors.New("Not implemented")
+
 type RicochetCore struct {
-	Network *ricochet.Network
-	Config  *ricochet.Config
+	config   *ricochet.Config
+	network  *ricochet.Network
+	identity *ricochet.Identity
 }
 
-var NotImplementedError error = errors.New("Not implemented")
+func (core *RicochetCore) Config() *ricochet.Config {
+	return core.config
+}
+
+func (core *RicochetCore) Network() *ricochet.Network {
+	return core.network
+}
+
+func (core *RicochetCore) Identity() *ricochet.Identity {
+	return core.identity
+}
 
 func (core *RicochetCore) GetServerStatus(ctx context.Context, req *rpc.ServerStatusRequest) (*rpc.ServerStatusReply, error) {
 	if req.RpcVersion != 1 {
@@ -27,12 +40,12 @@ func (core *RicochetCore) GetServerStatus(ctx context.Context, req *rpc.ServerSt
 }
 
 func (core *RicochetCore) MonitorNetwork(req *rpc.MonitorNetworkRequest, stream rpc.RicochetCore_MonitorNetworkServer) error {
-	events := core.Network.EventMonitor().Subscribe(20)
-	defer core.Network.EventMonitor().Unsubscribe(events)
+	events := core.Network().EventMonitor().Subscribe(20)
+	defer core.Network().EventMonitor().Unsubscribe(events)
 
 	// Send initial status event
 	{
-		event := core.Network.GetStatus()
+		event := core.Network().GetStatus()
 		if err := stream.Send(&event); err != nil {
 			return err
 		}
@@ -56,23 +69,26 @@ func (core *RicochetCore) MonitorNetwork(req *rpc.MonitorNetworkRequest, stream
 func (core *RicochetCore) StartNetwork(ctx context.Context, req *rpc.StartNetworkRequest) (*rpc.NetworkStatus, error) {
 	// err represents the result of the first connection attempt, but as long
 	// as 'ok' is true, the network has started and this call was successful.
-	ok, err := core.Network.Start("tcp://127.0.0.1:9051", "")
+	ok, err := core.Network().Start("tcp://127.0.0.1:9051", "")
 	if !ok {
 		return nil, err
 	}
 
-	status := core.Network.GetStatus()
+	status := core.Network().GetStatus()
 	return &status, nil
 }
 
 func (core *RicochetCore) StopNetwork(ctx context.Context, req *rpc.StopNetworkRequest) (*rpc.NetworkStatus, error) {
-	core.Network.Stop()
-	status := core.Network.GetStatus()
+	core.Network().Stop()
+	status := core.Network().GetStatus()
 	return &status, nil
 }
 
 func (core *RicochetCore) GetIdentity(ctx context.Context, req *rpc.IdentityRequest) (*rpc.Identity, error) {
-	return nil, NotImplementedError
+	reply := rpc.Identity{
+		Address: core.Identity().Address(),
+	}
+	return &reply, nil
 }
 
 func (core *RicochetCore) MonitorContacts(req *rpc.MonitorContactsRequest, stream rpc.RicochetCore_MonitorContactsServer) error {

cli/cli.go

@@ -88,6 +88,13 @@ func main() {
 				log.Fatalf("could not get status: %v", err)
 			}
 			log.Printf("get status result: %v", r)
+
+			identity, err := c.Backend.GetIdentity(context.Background(), &rpc.IdentityRequest{})
+			if err != nil {
+				log.Fatalf("could not get identity: %v", err)
+			}
+			log.Printf("identity: %v", identity)
+
 		case "connect":
 			status, err := c.Backend.StartNetwork(context.Background(), &rpc.StartNetworkRequest{})
 			if err != nil {

core/identity.go

@@ -1,29 +1,50 @@
 package core
 
-type Identity struct {
-	internalId int
+import (
+	"crypto/rsa"
+	"encoding/base64"
+	"errors"
+	"github.com/yawning/bulb/utils/pkcs1"
+	"log"
+)
 
-	name    string
+type Identity struct {
 	address    string
+	privateKey *rsa.PrivateKey
 
 	contactList *ContactList
 }
 
-func CreateIdentity(id int, name string) *Identity {
-	me := &Identity{
-		internalId:  id,
-		name:        name,
-		contactList: &ContactList{},
-	}
-	return me
+func CreateIdentity(core Ricochet) (*Identity, error) {
+	me := &Identity{}
+
+	config := core.Config().OpenRead()
+	defer config.Close()
+	if config.Identity.ServiceKey != "" {
+		keyData, err := base64.StdEncoding.DecodeString(config.Identity.ServiceKey)
+		if err != nil {
+			log.Printf("Decoding identity key failed: %v", err)
+			return nil, err
 		}
 
-func (me *Identity) InternalId() int {
-	return me.internalId
+		me.privateKey, _, err = pkcs1.DecodePrivateKeyDER(keyData)
+		if err != nil {
+			log.Printf("Decoding identity key failed: %v", err)
+			return nil, err
 		}
 
-func (me *Identity) Name() string {
-	return me.name
+		me.address, err = pkcs1.OnionAddr(&me.privateKey.PublicKey)
+		if err != nil && me.address == "" {
+			err = errors.New("Cannot calculate onion address")
+		}
+		if err != nil {
+			log.Printf("Decoding identify key failed: %v", err)
+			return nil, err
+		}
+		me.address = "ricochet:" + me.address
+	}
+
+	return me, nil
 }
 
 func (me *Identity) Address() string {

core/ricochet.go

@@ -1,20 +1,7 @@
 package core
 
-type Ricochet struct {
-	Network  *Network
-	Identity *Identity
-	Config   *Config
-}
-
-func Initialize(configPath string) (*Ricochet, error) {
-	cfg, err := LoadConfig(configPath)
-	if err != nil {
-		return nil, err
-	}
-
-	ricochet := &Ricochet{
-		Config: cfg,
-	}
-
-	return ricochet, nil
+type Ricochet interface {
+	Config() *Config
+	Network() *Network
+	Identity() *Identity
 }