public void Write(TLBinaryWriter to, byte[] authKey)
{
using (var output = new MemoryStream())
{
using (var writer = new TLBinaryWriter(output))
{
writer.WriteObject(Query);
var buffer = output.ToArray();
var random = new Random();
var length = buffer.Length;
int num2 = 16 - length % 16;
byte[] array = null;
if (num2 > 0 && num2 < 16)
{
array = new byte[num2];
random.NextBytes(array);
}
byte[] data2 = buffer;
if (array != null)
{
data2 = buffer.Concat(array).ToArray <byte>();
}
var msgKey = TLUtils.GetMsgKey(buffer);
var encryptKeyIV = Utils.GetEncryptKeyIV(authKey, msgKey);
var data3 = Utils.AesIge(data2, encryptKeyIV.Item1, encryptKeyIV.Item2, true);
AuthKeyId = TLUtils.GenerateLongAuthKeyId(authKey);
MsgKey = msgKey;
var Data = data3;
to.Write(AuthKeyId);
to.Write(MsgKey);
to.Write(Data);
}
}
}
public static TLEncryptedTransportMessage Encrypt(TLEncryptedTransportMessage transportMessage, byte[] authKey)
{
var random = new Random();
var data = transportMessage.Data;
var length = data.Length;
var padding = 16 - (length % 16);
byte[] paddingBytes = null;
if (padding > 0 && padding < 16)
{
paddingBytes = new byte[padding];
random.NextBytes(paddingBytes);
}
byte[] dataWithPadding = data;
if (paddingBytes != null)
{
dataWithPadding = data.Concat(paddingBytes).ToArray();
}
var msgKey = TLUtils.GetMsgKey(data);
var keyIV = Utils.GetEncryptKeyIV(authKey, msgKey);
var encryptedData = Utils.AesIge(dataWithPadding, keyIV.Item1, keyIV.Item2, true);
//TLUtils.WriteLine("--Compute auth key sha1--");
var authKeyId = TLUtils.GenerateLongAuthKeyId(authKey);
transportMessage.AuthKeyId = new TLLong(authKeyId);
transportMessage.MsgKey = msgKey;
transportMessage.Data = encryptedData;
return(transportMessage);
}
public static TLEncryptedTransportMessage Encrypt(TLEncryptedTransportMessage transportMessage, byte[] authKey)
{
#if MTPROTO
var random = new SecureRandom();
var data = transportMessage.Data;
var length = data.Length;
var padding = 16 - (length % 16);
byte[] paddingBytes = null;
if (padding < 12)
{
padding += 16;
}
if (padding >= 12 && padding <= 1024)
{
paddingBytes = new byte[padding];
random.NextBytes(paddingBytes);
}
var dataWithPadding = data;
if (paddingBytes != null)
{
dataWithPadding = TLUtils.Combine(data, paddingBytes);
}
var msgKey = TLUtils.GetEncryptMsgKey(authKey, dataWithPadding);
var keyIV = TLUtils.GetEncryptKeyIV(authKey, msgKey);
var encryptedData = Utils.AesIge(dataWithPadding, keyIV.Item1, keyIV.Item2, true);
var authKeyId = TLUtils.GenerateLongAuthKeyId(authKey);
transportMessage.AuthKeyId = new TLLong(authKeyId);
transportMessage.MsgKey = msgKey;
transportMessage.Data = encryptedData;
return(transportMessage);
#else
var random = new SecureRandom();
var data = transportMessage.Data;
var length = data.Length;
var padding = 16 - (length % 16);
byte[] paddingBytes = null;
if (padding > 0 && padding < 16)
{
paddingBytes = new byte[padding];
random.NextBytes(paddingBytes);
}
byte[] dataWithPadding = data;
if (paddingBytes != null)
{
dataWithPadding = TLUtils.Combine(data, paddingBytes);
}
var msgKey = TLUtils.GetMsgKey(data);
var keyIV = TLUtils.GetEncryptKeyIV(authKey, msgKey);
var encryptedData = Utils.AesIge(dataWithPadding, keyIV.Item1, keyIV.Item2, true);
var authKeyId = TLUtils.GenerateLongAuthKeyId(authKey);
transportMessage.AuthKeyId = new TLLong(authKeyId);
transportMessage.MsgKey = msgKey;
transportMessage.Data = encryptedData;
return(transportMessage);
#endif
}
