public Step2_Response FromBytes(byte[] response)
{
byte[] encryptedAnswer;
using (MemoryStream responseStream = new MemoryStream(response, false))
{
using (TBinaryReader responseReader = new TBinaryReader(responseStream))
{
uint responseCode = responseReader.ReadUInt32();
if (responseCode == 0x79cb045d)
{
// server_DH_params_fail
throw new InvalidOperationException("server_DH_params_fail: TODO");
}
if (responseCode != 0xd0e8075c)
{
throw new InvalidOperationException($"invalid response code: {responseCode}");
}
byte[] nonceFromServer = responseReader.ReadBytes(16);
// TODO:!
/*
* if (!nonceFromServer.SequenceEqual(nonce))
* {
* logger.debug("invalid nonce from server");
* return null;
* }
*/
byte[] serverNonceFromServer = responseReader.ReadBytes(16);
// TODO: !
/*
* if (!serverNonceFromServer.SequenceEqual(serverNonce))
* {
* logger.error("invalid server nonce from server");
* return null;
* }
*/
encryptedAnswer = responseReader.ReadBytes();
return(new Step2_Response()
{
EncryptedAnswer = encryptedAnswer,
ServerNonce = serverNonceFromServer,
Nonce = nonceFromServer,
NewNonce = newNonce
});
}
}
}
public Step1_Response FromBytes(byte[] bytes)
{
var fingerprints = new List <byte[]>();
using (var memoryStream = new MemoryStream(bytes, false))
{
using (var binaryReader = new TBinaryReader(memoryStream))
{
const int responseConstructorNumber = 0x05162463;
var responseCode = binaryReader.ReadInt32();
if (responseCode != responseConstructorNumber)
{
throw new InvalidOperationException($"invalid response code: {responseCode}");
}
var nonceFromServer = binaryReader.ReadBytes(16);
if (!nonceFromServer.SequenceEqual(nonce))
{
throw new InvalidOperationException("invalid nonce from server");
}
var serverNonce = binaryReader.ReadBytes(16);
byte[] pqbytes = binaryReader.ReadBytes();
var pq = new BigInteger(1, pqbytes);
var vectorId = binaryReader.ReadInt32();
const int vectorConstructorNumber = 0x1cb5c415;
if (vectorId != vectorConstructorNumber)
{
throw new InvalidOperationException($"Invalid vector constructor number {vectorId}");
}
var fingerprintCount = binaryReader.ReadInt32();
for (var i = 0; i < fingerprintCount; i++)
{
byte[] fingerprint = binaryReader.ReadBytes(8);
fingerprints.Add(fingerprint);
}
return(new Step1_Response
{
Fingerprints = fingerprints,
Nonce = nonce,
Pq = pq,
ServerNonce = serverNonce
});
}
}
}
private bool HandleGzipPacked(long messageId, int sequence, TBinaryReader messageReader, MTProtoRequest request)
{
uint code = messageReader.ReadUInt32();
byte[] packedData = GZipStream.UncompressBuffer(messageReader.ReadBytes());
using (MemoryStream packedStream = new MemoryStream(packedData, false))
using (TBinaryReader compressedReader = new TBinaryReader(packedStream))
{
processMessage(messageId, sequence, compressedReader, request);
}
return(true);
}
public static Session FromBytes(byte[] buffer, ISessionStore store, string sessionUserId)
{
using (var stream = new MemoryStream(buffer))
using (var reader = new TBinaryReader(stream))
{
var id = reader.ReadUInt64();
var sequence = reader.ReadInt32();
var salt = reader.ReadUInt64();
var lastMessageId = reader.ReadInt64();
var timeOffset = reader.ReadInt32();
var serverAddress = reader.ReadString();
var port = reader.ReadInt32();
User user = null;
if (reader.ReadBoolean())
{
user = reader.Read <User>();
}
var authData = reader.ReadBytes();
return(new Session(store)
{
AuthKey = new AuthKey(authData),
Id = id,
Salt = salt,
Sequence = sequence,
LastMessageId = lastMessageId,
TimeOffset = timeOffset,
User = user,
SessionUserId = sessionUserId,
ServerAddress = serverAddress,
Port = port
});
}
}
private bool HandleRpcResult(long messageId, int sequence, TBinaryReader messageReader, MTProtoRequest request)
{
uint code = messageReader.ReadUInt32();
ulong requestId = messageReader.ReadUInt64();
if (requestId == (ulong)request.MessageId)
{
request.ConfirmReceived = true;
}
//throw new NotImplementedException();
/*
* lock (runningRequests)
* {
* if (!runningRequests.ContainsKey(requestId))
* {
* logger.warning("rpc response on unknown request: {0}", requestId);
* messageReader.BaseStream.Position -= 12;
* return false;
* }
* request = runningRequests[requestId];
* runningRequests.Remove(requestId);
* }
*/
uint innerCode = messageReader.ReadUInt32();
if (innerCode == 0x2144ca19)
{ // rpc_error
int errorCode = messageReader.ReadInt32();
string errorMessage = messageReader.ReadString();
if (errorMessage.StartsWith("FLOOD_WAIT_"))
{
var resultString = Regex.Match(errorMessage, @"\d+").Value;
var seconds = int.Parse(resultString);
Debug.WriteLine($"Should wait {seconds} sec.");
Thread.Sleep(1000 * seconds);
}
else if (errorMessage.StartsWith("PHONE_MIGRATE_"))
{
var resultString = Regex.Match(errorMessage, @"\d+").Value;
var dcIdx = int.Parse(resultString);
throw new InvalidOperationException($"Your phone number registered to {dcIdx} dc. Please update settings. See https://github.com/sochix/TeleTurk#i-get-an-error-migrate_x for details.");
}
else
{
throw new InvalidOperationException(errorMessage);
}
}
else if (innerCode == 0x3072cfa1)
{
// gzip_packed
byte[] packedData = messageReader.ReadBytes();
using (MemoryStream packedStream = new MemoryStream(packedData, false))
using (System.IO.Compression.GZipStream zipStream = new System.IO.Compression.GZipStream(packedStream, System.IO.Compression.CompressionMode.Decompress))
using (TBinaryReader compressedReader = new TBinaryReader(zipStream))
{
request.OnResponse(compressedReader);
}
}
else
{
messageReader.BaseStream.Position -= 4;
request.OnResponse(messageReader);
}
return(false);
}
public byte[] ToBytes(byte[] nonce, byte[] serverNonce, byte[] newNonce, byte[] encryptedAnswer)
{
this.newNonce = newNonce;
AESKeyData key = AES.GenerateKeyDataFromNonces(serverNonce, newNonce);
byte[] plaintextAnswer = AES.DecryptAES(key, encryptedAnswer);
// logger.debug("plaintext answer: {0}", BitConverter.ToString(plaintextAnswer));
int g;
BigInteger dhPrime;
BigInteger ga;
using (MemoryStream dhInnerData = new MemoryStream(plaintextAnswer))
{
using (TBinaryReader dhInnerDataReader = new TBinaryReader(dhInnerData))
{
byte[] hashsum = dhInnerDataReader.ReadBytes(20);
uint code = dhInnerDataReader.ReadUInt32();
if (code != 0xb5890dba)
{
throw new InvalidOperationException($"invalid dh_inner_data code: {code}");
}
// logger.debug("valid code");
byte[] nonceFromServer1 = dhInnerDataReader.ReadBytes(16);
if (!nonceFromServer1.SequenceEqual(nonce))
{
throw new InvalidOperationException("invalid nonce in encrypted answer");
}
// logger.debug("valid nonce");
byte[] serverNonceFromServer1 = dhInnerDataReader.ReadBytes(16);
if (!serverNonceFromServer1.SequenceEqual(serverNonce))
{
throw new InvalidOperationException("invalid server nonce in encrypted answer");
}
// logger.debug("valid server nonce");
g = dhInnerDataReader.ReadInt32();
dhPrime = new BigInteger(1, dhInnerDataReader.ReadBytes());
ga = new BigInteger(1, dhInnerDataReader.ReadBytes());
int serverTime = dhInnerDataReader.ReadInt32();
timeOffset = serverTime - (int)(Convert.ToInt64((DateTime.UtcNow - new DateTime(1970, 1, 1)).TotalMilliseconds) / 1000);
// logger.debug("g: {0}, dhprime: {1}, ga: {2}", g, dhPrime, ga);
}
}
BigInteger b = new BigInteger(2048, new Random());
BigInteger gb = BigInteger.ValueOf(g).ModPow(b, dhPrime);
_gab = ga.ModPow(b, dhPrime);
// logger.debug("gab: {0}", gab);
// prepare client dh inner data
byte[] clientDHInnerDataBytes;
using (MemoryStream clientDhInnerData = new MemoryStream())
{
using (TBinaryWriter clientDhInnerDataWriter = new TBinaryWriter(clientDhInnerData))
{
clientDhInnerDataWriter.Write(0x6643b654); // client_dh_inner_data
clientDhInnerDataWriter.WriteBase(nonce);
clientDhInnerDataWriter.WriteBase(serverNonce);
clientDhInnerDataWriter.Write((long)0); // TODO: retry_id
clientDhInnerDataWriter.Write(gb.ToByteArrayUnsigned());
using (MemoryStream clientDhInnerDataWithHash = new MemoryStream())
{
using (BinaryWriter clientDhInnerDataWithHashWriter = new BinaryWriter(clientDhInnerDataWithHash))
{
using (SHA1 sha1 = new SHA1Managed())
{
clientDhInnerDataWithHashWriter.Write(sha1.ComputeHash(clientDhInnerData.GetBuffer(), 0, (int)clientDhInnerData.Position));
clientDhInnerDataWithHashWriter.Write(clientDhInnerData.GetBuffer(), 0, (int)clientDhInnerData.Position);
clientDHInnerDataBytes = clientDhInnerDataWithHash.ToArray();
}
}
}
}
}
// logger.debug("client dh inner data papared len {0}: {1}", clientDHInnerDataBytes.Length, BitConverter.ToString(clientDHInnerDataBytes).Replace("-", ""));
// encryption
byte[] clientDhInnerDataEncryptedBytes = AES.EncryptAES(key, clientDHInnerDataBytes);
// logger.debug("inner data encrypted {0}: {1}", clientDhInnerDataEncryptedBytes.Length, BitConverter.ToString(clientDhInnerDataEncryptedBytes).Replace("-", ""));
// prepare set_client_dh_params
byte[] setclientDhParamsBytes;
using (MemoryStream setClientDhParams = new MemoryStream())
{
using (TBinaryWriter setClientDhParamsWriter = new TBinaryWriter(setClientDhParams))
{
setClientDhParamsWriter.Write(0xf5045f1f);
setClientDhParamsWriter.WriteBase(nonce);
setClientDhParamsWriter.WriteBase(serverNonce);
setClientDhParamsWriter.Write(clientDhInnerDataEncryptedBytes);
setclientDhParamsBytes = setClientDhParams.ToArray();
}
}
// logger.debug("set client dh params prepared: {0}", BitConverter.ToString(setclientDhParamsBytes));
return(setclientDhParamsBytes);
}