private byte[] GetMac(uint messageVersion,
IdentityKey senderIdentityKey,
IdentityKey receiverIdentityKey,
byte[] macKey, byte[] serialized)
{
try
{
MemoryStream stream = new MemoryStream();
if (messageVersion >= 3)
{
byte[] sik = senderIdentityKey.GetPublicKey().Serialize();
stream.Write(sik, 0, sik.Length);
byte[] rik = receiverIdentityKey.GetPublicKey().Serialize();
stream.Write(rik, 0, rik.Length);
}
stream.Write(serialized, 0, serialized.Length);
byte[] fullMac = Sign.Sha256Sum(macKey, stream.ToArray());
return(ByteUtil.Trim(fullMac, MacLength));
}
catch (/*NoSuchAlgorithmException | java.security.InvalidKey*/ Exception e)
{
throw new Exception(e.Message);
}
}
/// <summary>
///
/// </summary>
/// <param name="recipientId"></param>
/// <param name="identityKey"></param>
public bool SaveIdentity(string recipientId, IdentityKey identityKey)
{
if (IdentitiesObjectDic.ContainsKey(recipientId))
{
IdentitiesObjectDic.Remove(recipientId);
}
IdentitiesObjectDic.Add(recipientId, new IdentitiesObject()
{
RecipientId = recipientId,
PublicKey = identityKey.GetPublicKey().Serialize()
});
return(true);
}
public bool SaveIdentity(string recipientId, IdentityKey identityKey)
{
IdentityKeysRepository identityKeysRepository = new IdentityKeysRepository();
List <IdentityKeys> identityKeys = identityKeysRepository.GetIdentityKeys(recipientId);
if (identityKeys != null && identityKeys.Count > 0)
{
IdentityKeys identity = identityKeys.First();
identityKeysRepository.Delete(identity);
}
IdentityKeys newKeys = new IdentityKeys()
{
RecipientId = recipientId,
PublicKey = identityKey.GetPublicKey().Serialize()
};
return(identityKeysRepository.Save(newKeys));
}
public DeviceConsistencyMessage(DeviceConsistencyCommitment commitment, byte[] serialized, IdentityKey identityKey)
{
try
{
SignalProtos.DeviceConsistencyCodeMessage message = SignalProtos.DeviceConsistencyCodeMessage.ParseFrom(serialized);
byte[] vrfOutputBytes = Curve.VerifyVrfSignature(identityKey.GetPublicKey(), commitment.ToByteArray(), message.Signature.ToByteArray());
_generation = (int)message.Generation;
_signature = new DeviceConsistencySignature(message.Signature.ToByteArray(), vrfOutputBytes);
_serialized = serialized;
}
catch (InvalidProtocolBufferException e)
{
throw new InvalidMessageException(e);
}
catch (InvalidKeyException e)
{
throw new InvalidMessageException(e);
}
catch (VrfSignatureVerificationFailedException e)
{
throw new InvalidMessageException(e);
}
}