public static TLEncryptedTransportMessage Decrypt(TLEncryptedTransportMessage transportMessage, byte[] authKey)
{
var keyIV = TLUtils.GetDecryptKeyIV(authKey, transportMessage.MsgKey);
transportMessage.Data = Utils.AesIge(transportMessage.Data, keyIV.Item1, keyIV.Item2, false);
//var msgKey = TLUtils.GetDecryptMsgKey(authKey, transportMessage.Data);
//if (!TLUtils.ByteArraysEqual(msgKey, transportMessage.MsgKey))
//{
// transportMessage.Data = null;
//}
return(transportMessage);
}
public static TLResponse Parse(byte[] bytes, byte[] authKey)
{
TLUtils.WriteLine("-------------------");
TLUtils.WriteLine("--Parse response --");
TLUtils.WriteLine("-------------------");
int position = 0;
var response = new TLResponse();
response.AuthKeyId = bytes.SubArray(0, 8);
TLUtils.WriteLine("AuthKeyId: " + BitConverter.ToString(response.AuthKeyId));
response.MessageKey = bytes.SubArray(8, 16);
TLUtils.WriteLine("MessageKey: " + BitConverter.ToString(response.MessageKey));
response.EncryptedData = bytes.SubArray(24, bytes.Length - 24);
//TLUtils.WriteLine("Encrypted data: " + BitConverter.ToString(response.Data));
var keyIV = TLUtils.GetDecryptKeyIV(authKey, response.MessageKey);
response.DecryptedData = Utils.AesIge(response.EncryptedData, keyIV.Item1, keyIV.Item2, false);
//TLUtils.WriteLine("Decrypted data: " + BitConverter.ToString(response.DecryptedData));
response.Salt = response.DecryptedData.SubArray(0, 8);
TLUtils.WriteLine("Salt: " + BitConverter.ToString(response.Salt));
response.SessionId = response.DecryptedData.SubArray(8, 8);
TLUtils.WriteLine("SessionId: " + BitConverter.ToString(response.SessionId));
position = 0;
response.MessageId = TLObject.GetObject <TLLong>(response.DecryptedData.SubArray(16, 8), ref position);
TLUtils.WriteLine("<-MESSAGEID: " + TLUtils.MessageIdString(response.MessageId));
position = 0;
response.SequenceNumber = TLObject.GetObject <TLInt>(response.DecryptedData.SubArray(24, 4), ref position);
TLUtils.WriteLine(" SEQUENCENUMBER: " + response.SequenceNumber);
response.MessageLength = BitConverter.ToInt32(response.DecryptedData.SubArray(28, 4), 0);
TLUtils.WriteLine("MessageLength: " + response.MessageLength);
response.MessageData = response.DecryptedData.SubArray(32, response.MessageLength);
TLUtils.WriteLine("MessageData: " + BitConverter.ToString(response.MessageData));
position = 0;
response.Data = TLObject.GetObject <TLObject>(response.MessageData, ref position);
return(response);
}
