/// <exception cref="System.Exception"></exception>
public virtual Buffer Read(Buffer buf)
{
int j = 0;
while (true)
{
buf.Reset();
io.GetByte(buf.buffer, buf.index, s2ccipher_size);
buf.index += s2ccipher_size;
if (s2ccipher != null)
{
s2ccipher.Update(buf.buffer, 0, s2ccipher_size, buf.buffer, 0);
}
j = ((buf.buffer[0] << 24) & unchecked((int)(0xff000000))) | ((buf.buffer[1] << 16
) & unchecked((int)(0x00ff0000))) | ((buf.buffer[2] << 8) & unchecked((int)(0x0000ff00
))) | ((buf.buffer[3]) & unchecked((int)(0x000000ff)));
// RFC 4253 6.1. Maximum Packet Length
if (j < 5 || j > PACKET_MAX_SIZE)
{
Start_discard(buf, s2ccipher, s2cmac, j, PACKET_MAX_SIZE);
}
int need = j + 4 - s2ccipher_size;
//if(need<0){
// throw new IOException("invalid data");
//}
if ((buf.index + need) > buf.buffer.Length)
{
byte[] foo = new byte[buf.index + need];
System.Array.Copy(buf.buffer, 0, foo, 0, buf.index);
buf.buffer = foo;
}
if ((need % s2ccipher_size) != 0)
{
string message = "Bad packet length " + need;
if (JSch.GetLogger().IsEnabled(Logger.FATAL))
{
JSch.GetLogger().Log(Logger.FATAL, message);
}
Start_discard(buf, s2ccipher, s2cmac, j, PACKET_MAX_SIZE - s2ccipher_size);
}
if (need > 0)
{
io.GetByte(buf.buffer, buf.index, need);
buf.index += (need);
if (s2ccipher != null)
{
s2ccipher.Update(buf.buffer, s2ccipher_size, need, buf.buffer, s2ccipher_size);
}
}
if (s2cmac != null)
{
s2cmac.Update(seqi);
s2cmac.Update(buf.buffer, 0, buf.index);
s2cmac.DoFinal(s2cmac_result1, 0);
io.GetByte(s2cmac_result2, 0, s2cmac_result2.Length);
if (!Arrays.Equals(s2cmac_result1, s2cmac_result2))
{
if (need > PACKET_MAX_SIZE)
{
throw new IOException("MAC Error");
}
Start_discard(buf, s2ccipher, s2cmac, j, PACKET_MAX_SIZE - need);
continue;
}
}
seqi++;
if (inflater != null)
{
//inflater.uncompress(buf);
int pad = buf.buffer[4];
uncompress_len[0] = buf.index - 5 - pad;
byte[] foo = inflater.Uncompress(buf.buffer, 5, uncompress_len);
if (foo != null)
{
buf.buffer = foo;
buf.index = 5 + uncompress_len[0];
}
else
{
System.Console.Error.WriteLine("fail in inflater");
break;
}
}
int type = buf.GetCommand() & unchecked((int)(0xff));
//System.err.println("read: "+type);
if (type == SSH_MSG_DISCONNECT)
{
buf.Rewind();
buf.GetInt();
buf.GetShort();
int reason_code = buf.GetInt();
byte[] description = buf.GetString();
byte[] language_tag = buf.GetString();
throw new JSchException("SSH_MSG_DISCONNECT: " + reason_code + " " + Util.Byte2str
(description) + " " + Util.Byte2str(language_tag));
}
else
{
//break;
if (type == SSH_MSG_IGNORE)
{
}
else
{
if (type == SSH_MSG_UNIMPLEMENTED)
{
buf.Rewind();
buf.GetInt();
buf.GetShort();
int reason_id = buf.GetInt();
if (JSch.GetLogger().IsEnabled(Logger.INFO))
{
JSch.GetLogger().Log(Logger.INFO, "Received SSH_MSG_UNIMPLEMENTED for " + reason_id
);
}
}
else
{
if (type == SSH_MSG_DEBUG)
{
buf.Rewind();
buf.GetInt();
buf.GetShort();
}
else
{
if (type == SSH_MSG_CHANNEL_WINDOW_ADJUST)
{
buf.Rewind();
buf.GetInt();
buf.GetShort();
Channel c = Channel.GetChannel(buf.GetInt(), this);
if (c == null)
{
}
else
{
c.AddRemoteWindowSize(buf.GetInt());
}
}
else
{
if (type == UserAuth.SSH_MSG_USERAUTH_SUCCESS)
{
isAuthed = true;
if (inflater == null && deflater == null)
{
string method;
method = guess[KeyExchange.PROPOSAL_COMP_ALGS_CTOS];
InitDeflater(method);
method = guess[KeyExchange.PROPOSAL_COMP_ALGS_STOC];
InitInflater(method);
}
break;
}
else
{
break;
}
}
}
}
}
}
}
buf.Rewind();
return buf;
}
/// <exception cref="System.IO.IOException"></exception>
private ChannelHeader Header(Buffer buf, ChannelHeader header)
{
buf.Rewind();
int i = Fill(buf.buffer, 0, 9);
header.length = buf.GetInt() - 5;
header.type = buf.GetByte() & unchecked((int)(0xff));
header.rid = buf.GetInt();
return header;
}