func CreateTestHomeServerConn(dename string, denameClient *client.Client, secretConfig *proto.LocalAccountConfig, t testing.TB) *transport.Conn {
profile, err := denameClient.Lookup(dename)
if err != nil {
t.Fatal(err)
}
chatProfileBytes, err := client.GetProfileField(profile, PROFILE_FIELD_ID)
if err != nil {
t.Fatal(err)
}
chatProfile := new(proto.Profile)
if err := chatProfile.Unmarshal(chatProfileBytes); err != nil {
t.Fatal(err)
}
addr := chatProfile.ServerAddressTCP
port := chatProfile.ServerPortTCP
pkTransport := ([32]byte)(chatProfile.ServerTransportPK)
pkp := (*[32]byte)(&chatProfile.UserIDAtServer)
oldConn, err := net.Dial("tcp", net.JoinHostPort(addr, fmt.Sprint(port)))
if err != nil {
t.Fatal(err)
}
skp := (*[32]byte)(&secretConfig.TransportSecretKeyForServer)
conn, _, err := transport.Handshake(oldConn, pkp, skp, &pkTransport, proto.SERVER_MESSAGE_SIZE)
if err != nil {
t.Fatal(err)
}
return conn
}
func (d *Daemon) sendMessage(msg []byte, theirDename string, msgRatch *ratchet.Ratchet) error {
profile := new(dename.Profile)
err := persistence.UnmarshalFromFile(d.profilePath(theirDename), profile)
if err != nil {
return err
}
chatProfileBytes, err := client.GetProfileField(profile, util.PROFILE_FIELD_ID)
if err != nil {
return err
}
chatProfile := new(proto.Profile)
if err := chatProfile.Unmarshal(chatProfileBytes); err != nil {
return err
}
addr := chatProfile.ServerAddressTCP
port := (int)(chatProfile.ServerPortTCP)
pkTransport := (*[32]byte)(&chatProfile.ServerTransportPK)
theirPk := (*[32]byte)(&chatProfile.UserIDAtServer)
if err != nil {
return err
}
theirInBuf := make([]byte, proto.SERVER_MESSAGE_SIZE)
encMsg, ratch, err := util.EncryptAuth(msg, msgRatch)
if err != nil {
return err
}
theirConn, err := d.cc.DialServer(theirDename, addr, port, pkTransport, nil, nil)
if err != nil {
return err
}
if err := StoreRatchet(d, theirDename, ratch); err != nil {
theirConn.Close()
d.cc.PutClose(theirDename)
return err
}
err = util.UploadMessageToUser(theirConn, theirInBuf, theirPk, encMsg)
if err != nil {
theirConn.Close()
d.cc.PutClose(theirDename)
return err
}
d.cc.Put(theirDename, theirConn)
return nil
}
func GenerateLongTermKeys(secretConfig *proto.LocalAccountConfig, publicProfile *proto.Profile, rand io.Reader) error {
if pk, sk, err := box.GenerateKey(rand); err != nil {
return err
} else {
secretConfig.TransportSecretKeyForServer = (proto.Byte32)(*sk)
publicProfile.UserIDAtServer = (proto.Byte32)(*pk)
}
if pk, sk, err := box.GenerateKey(rand); err != nil {
return err
} else {
secretConfig.MessageAuthSecretKey = (proto.Byte32)(*sk)
publicProfile.MessageAuthKey = (proto.Byte32)(*pk)
}
if pk, sk, err := ed25519.GenerateKey(rand); err != nil {
return err
} else {
secretConfig.KeySigningSecretKey = sk[:]
publicProfile.KeySigningKey = (proto.Byte32)(*pk)
}
return nil
}
func CheckAuthWith(prt ProfileRatchet) func([]byte, []byte, []byte, *[32]byte) error {
return func(tag, data, msg []byte, ourAuthPrivate *[32]byte) error {
var sharedAuthKey [32]byte
message := new(proto.Message)
unpadMsg := proto.Unpad(msg)
err := message.Unmarshal(unpadMsg)
if err != nil {
return err
}
profile, err := prt(message.Dename, message.DenameLookup)
if err != nil {
return err
}
chatProfileBytes, err := client.GetProfileField(profile, PROFILE_FIELD_ID)
if err != nil {
return err
}
chatProfile := new(proto.Profile)
if err := chatProfile.Unmarshal(chatProfileBytes); err != nil {
return err
}
theirAuthPublic := (*[32]byte)(&chatProfile.MessageAuthKey)
curve25519.ScalarMult(&sharedAuthKey, ourAuthPrivate, theirAuthPublic)
h := hmac.New(sha256.New, sharedAuthKey[:])
h.Write(data)
if subtle.ConstantTimeCompare(tag, h.Sum(nil)[:len(tag)]) == 0 {
return errors.New("Authentication failed: failed to reproduce envelope auth tag using the current auth pubkey from dename")
}
return nil
}
}
func (d *Daemon) sendFirstMessage(msg []byte, theirDename string) error {
profile, err := d.foreignDenameClient.Lookup(theirDename)
if err != nil {
return err
}
if profile == nil {
fmt.Errorf("unkown dename on to line: " + theirDename)
}
if err := d.MarshalToFile(d.profilePath(theirDename), profile); err != nil {
return err
}
chatProfileBytes, err := client.GetProfileField(profile, util.PROFILE_FIELD_ID)
if err != nil {
return err
}
chatProfile := new(proto.Profile)
if err := chatProfile.Unmarshal(chatProfileBytes); err != nil {
return err
}
addr := chatProfile.ServerAddressTCP
pkSig := (*[32]byte)(&chatProfile.KeySigningKey)
port := (int)(chatProfile.ServerPortTCP)
pkTransport := (*[32]byte)(&chatProfile.ServerTransportPK)
theirPk := (*[32]byte)(&chatProfile.UserIDAtServer)
ourSkAuth := (*[32]byte)(&d.MessageAuthSecretKey)
theirConn, err := d.cc.DialServer(theirDename, addr, port, pkTransport, nil, nil)
if err != nil {
return err
}
theirInBuf := make([]byte, proto.SERVER_MESSAGE_SIZE)
theirKey, err := util.GetKey(theirConn, theirInBuf, theirPk, theirDename, pkSig)
if err != nil {
theirConn.Close()
d.cc.PutClose(theirDename)
return err
}
encMsg, ratch, err := util.EncryptAuthFirst(msg, ourSkAuth, theirKey, d.ProfileRatchet)
if err != nil {
theirConn.Close()
d.cc.PutClose(theirDename)
return err
}
if err := StoreRatchet(d, theirDename, ratch); err != nil {
theirConn.Close()
d.cc.PutClose(theirDename)
return err
}
err = util.UploadMessageToUser(theirConn, theirInBuf, theirPk, encMsg)
if err != nil {
theirConn.Close()
d.cc.PutClose(theirDename)
return err
}
d.cc.Put(theirDename, theirConn)
return nil
}