private Maybe<UInt32> ProcessV3(SessionRecord sessionRecord, PreKeyWhisperMessage message)
{
if (sessionRecord.HasSessionState(message.MessageVersion, message.BaseKey.Serialize()))
{
Logger.w("SessionBuilder : ", "We've already setup a session for this V3 message, letting bundled message fall through...");
return Maybe<UInt32>.Nothing;
}
var ourSignedPreKey = _signedPreKeyStore.LoadSignedPreKey(message.SignedPreKeyId).keyPair;
var bobParams = BobAxolotlParameters.NewBuilder ();
bobParams.SetTheirBaseKey(message.BaseKey)
.SetTheirIdentityKey(message.IdentityKey)
.SetOurIdentityKey(_identityKeyStore.GetIdentityKeyPair())
.SetOurSignedPreKey(ourSignedPreKey)
.SetOurRatchetKey(ourSignedPreKey);
if (message.PreKeyId.IsSomething()) {
message.PreKeyId.Do (pKid => {
bobParams.SetOurOneTimePreKey(_preKeyStore.LoadPreKey(pKid).KeyPair.ToMaybe());
});
} else {
bobParams.SetOurOneTimePreKey(Maybe<ECKeyPair>.Nothing);
}
if (!sessionRecord.IsFresh) sessionRecord.ArchiveCurrentState();
RatchetingSession.InitializeSession(sessionRecord.SessionState, message.MessageVersion, bobParams.Create());
sessionRecord.SessionState.LocalRegistrationId = _identityKeyStore.GetLocalRegistrationId();
sessionRecord.SessionState.RemoteRegistrationId = message.RegistrationId;
sessionRecord.SessionState.AliceBaseKey = message.BaseKey.Serialize();
if (message.PreKeyId.IsSomething() &&
message.PreKeyId.Value != Medium.MAX_VALUE) {
return message.PreKeyId;
} else {
return Maybe<UInt32>.Nothing;
}
}
private Maybe<UInt32> ProcessV2(SessionRecord sessionRecord, PreKeyWhisperMessage message)
{
if (message.PreKeyId.IsNothing()) {
throw new InvalidKeyIdException("V2 message requires one time prekey id!");
}
if (!_preKeyStore.ContainsPreKey(message.PreKeyId.Value) &&
_sessionStore.ContainsSession(_remoteAddress))
{
Console.WriteLine("TAG" + "We've already processed the prekey part of this V2 session, letting bundled message fall through...");
return Maybe<UInt32>.Nothing;
}
var ourPreKey = _preKeyStore.LoadPreKey(message.PreKeyId.Value).KeyPair;
var bobParams = BobAxolotlParameters.NewBuilder();
bobParams.SetOurIdentityKey(_identityKeyStore.GetIdentityKeyPair())
.SetOurSignedPreKey(ourPreKey)
.SetOurRatchetKey(ourPreKey)
.SetOurOneTimePreKey(Maybe<ECKeyPair>.Nothing)
.SetTheirIdentityKey(message.IdentityKey)
.SetTheirBaseKey(message.BaseKey);
if (!sessionRecord.IsFresh) sessionRecord.ArchiveCurrentState();
RatchetingSession.InitializeSession(sessionRecord.SessionState, message.MessageVersion, bobParams.Create());
sessionRecord.SessionState.LocalRegistrationId = _identityKeyStore.GetLocalRegistrationId();
sessionRecord.SessionState.RemoteRegistrationId = message.RegistrationId;
sessionRecord.SessionState.AliceBaseKey = message.BaseKey.Serialize();
if (message.PreKeyId.Value != Medium.MAX_VALUE) {
return message.PreKeyId;
} else {
return Maybe<UInt32>.Nothing;
}
}
