public Packet RecvPacket(ICryptoTransform decryptor)
{
if (decryptor == null)
{
Packet packet = new Packet();
uint packet_length = reader.ReadUInt32();
byte padding_length = reader.ReadByte();
byte[] payload = reader.ReadBytes(packet_length - padding_length - 1);
byte[] padding = reader.ReadBytes(padding_length);
packet.SetPayload(payload);
return packet;
}
else
{
int blocksize = Math.Max(decryptor.InputBlockSize, 8);
MemoryStream ms_packet = new MemoryStream();
NetworkByteWriter writer_packet = new NetworkByteWriter(ms_packet);
byte[] buffer = new byte[blocksize];
bool first = true;
int more = 0;
while (true)
{
// read a block
int ret = reader.ReadBytes(buffer, 0, blocksize);
// must be a real block size;
if (ret != blocksize) return null;
decryptor.TransformBlock(buffer, 0, buffer.Length, buffer, 0);
writer_packet.WriteBytes(buffer);
if (first) // it's first time, need parse packet_length and padding_length
{
NetworkByteReader reader_buffer = new NetworkByteReader(new MemoryStream(buffer));
uint packet_length_t = reader_buffer.ReadUInt32();
first = false;
more = (int)packet_length_t + 4 - blocksize;
if (more % blocksize != 0) return null;
}
else
{
more -= blocksize;
}
if (more <= 0) break;
}
byte[] mac = reader.ReadBytes(20);
ms_packet.Seek(0, SeekOrigin.Begin);
NetworkByteReader reader_packet = new NetworkByteReader(ms_packet);
Packet packet = new Packet();
uint packet_length = reader_packet.ReadUInt32();
byte padding_length = reader_packet.ReadByte();
byte[] payload = reader_packet.ReadBytes(packet_length - padding_length - 1);
byte[] padding = reader_packet.ReadBytes(padding_length);
packet.SetPayload(payload);
return packet;
}
}
public bool Connect(string address, int port)
{
tcpclient = new TcpClient(address, port);
NetworkStream ns = tcpclient.GetStream();
reader = new NetworkByteReader(ns);
writer = new NetworkByteWriter(ns);
return false;
}
public void KeyVerify(string algorithm, HashAlgorithm hash)
{
MemoryStream cache = new MemoryStream();
NetworkByteWriter nbr_cache = new NetworkByteWriter(cache);
nbr_cache.WriteString(verify_v_c);
nbr_cache.WriteString(verify_v_s);
nbr_cache.WriteBlob(verify_i_c);
nbr_cache.WriteBlob(verify_i_s);
nbr_cache.WriteBlob(verify_k_s);
nbr_cache.WriteMPInt(verify_e);
nbr_cache.WriteMPInt(verify_f);
nbr_cache.WriteMPInt(verify_k);
nbr_cache.Flush();
if (algorithm == "ssh-rsa")
{
verify_h = hash.ComputeHash(cache.ToArray());
RSAParameters RSAKeyInfo = new RSAParameters();
{
MemoryStream ms_tmp = new MemoryStream(verify_k_s);
NetworkByteReader nbr_tmp = new NetworkByteReader(ms_tmp);
string type = nbr_tmp.ReadString();
BigInteger rsa_e = nbr_tmp.ReadMPInt();
BigInteger rsa_n = nbr_tmp.ReadMPInt();
RSAKeyInfo.Modulus = NetworkByteUtils.BigIntegerToUnsignedArray(rsa_n);
RSAKeyInfo.Exponent = NetworkByteUtils.BigIntegerToUnsignedArray(rsa_e);
}
byte[] rsa_signature_blob;
{
MemoryStream ms_tmp = new MemoryStream(verify_sig);
NetworkByteReader nbr_tmp = new NetworkByteReader(ms_tmp);
string type = nbr_tmp.ReadString();
rsa_signature_blob = nbr_tmp.ReadBlob();
}
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
RSA.ImportParameters(RSAKeyInfo);
RSAPKCS1SignatureDeformatter RSADeformatter = new RSAPKCS1SignatureDeformatter(RSA);
RSADeformatter.SetHashAlgorithm("SHA1");
byte[] xx2 = SHA1.Create().ComputeHash(verify_h);
bool verify = RSADeformatter.VerifySignature(xx2, rsa_signature_blob);
}
}
public void DumpError(Packet packet)
{
MemoryStream ms = new MemoryStream(packet.GetPayload());
NetworkByteReader nbr = new NetworkByteReader(ms);
nbr.ReadByte();
nbr.ReadUInt32();
string xxx = nbr.ReadString();
}
public override void Parse()
{
MemoryStream ms = new MemoryStream(payload);
NetworkByteReader nbr = new NetworkByteReader(ms);
nbr.ReadByte();
certificates = nbr.ReadBlob();
{
MemoryStream ms_tmp = new MemoryStream(certificates);
NetworkByteReader nbr_tmp = new NetworkByteReader(ms_tmp);
string type = nbr_tmp.ReadString();
BigInteger rsa_e = nbr_tmp.ReadMPInt();
BigInteger rsa_n = nbr_tmp.ReadMPInt();
}
f = nbr.ReadMPInt();
signature = nbr.ReadBlob();
{
MemoryStream ms_tmp = new MemoryStream(signature);
NetworkByteReader nbr_tmp = new NetworkByteReader(ms_tmp);
string type = nbr_tmp.ReadString();
byte[] rsa_signature_blob = nbr_tmp.ReadBlob();
}
}
public override void Parse()
{
MemoryStream ms = new MemoryStream(payload);
NetworkByteReader nbr = new NetworkByteReader(ms);
nbr.ReadByte();
cookie = nbr.ReadBytes(16);
kex_algorithms = nbr.ReadNameList();
server_host_key_algorithms = nbr.ReadNameList();
encryption_algorithms_client_to_server = nbr.ReadNameList();
encryption_algorithms_server_to_client = nbr.ReadNameList();
mac_algorithms_client_to_server = nbr.ReadNameList();
mac_algorithms_server_to_client = nbr.ReadNameList();
compression_algorithms_client_to_server = nbr.ReadNameList();
compression_algorithms_server_to_client = nbr.ReadNameList();
languages_client_to_server = nbr.ReadNameList();
languages_server_to_client = nbr.ReadNameList();
first_kex_packet_follows = nbr.ReadBoolean();
reserved = nbr.ReadUInt32();
}
public override void Parse()
{
MemoryStream ms = new MemoryStream(payload);
NetworkByteReader nbr = new NetworkByteReader(ms);
nbr.ReadByte();
nbr.ReadUInt32();
data = nbr.ReadString();
Console.Write(data);
}
