//returns true if a new packet could be obtained
private SSH1Packet ConstructPacket()
{
if (_event != null && !_event.WaitOne(3000))
{
throw new Exception("waithandle timed out");
}
if (_writeOffset - _readOffset < 4)
{
return(null);
}
int packet_length = SSHUtil.ReadInt32(_buffer, _readOffset);
int padding_length = 8 - (packet_length % 8); //padding length
int total = packet_length + padding_length;
if (_writeOffset - _readOffset < 4 + total)
{
return(null);
}
byte[] decrypted = new byte[total];
if (_cipher != null)
{
_cipher.Decrypt(_buffer, _readOffset + 4, total, decrypted, 0);
}
else
{
Array.Copy(_buffer, _readOffset + 4, decrypted, 0, total);
}
_readOffset += 4 + total;
SSH1Packet p = new SSH1Packet();
p.ConstructAndCheck(decrypted, packet_length, padding_length, _checkMAC);
return(p);
}
//returns true if a new packet could be obtained
private SSH1Packet ConstructPacket()
{
if(_event!=null && !_event.WaitOne(3000))
throw new Exception("waithandle timed out");
if(_writeOffset-_readOffset<4) return null;
int packet_length = SSHUtil.ReadInt32(_buffer, _readOffset);
int padding_length = 8 - (packet_length % 8); //padding length
int total = packet_length + padding_length;
if(_writeOffset-_readOffset<4+total) return null;
byte[] decrypted = new byte[total];
if(_cipher!=null)
_cipher.Decrypt(_buffer, _readOffset+4, total, decrypted, 0);
else
Array.Copy(_buffer, _readOffset+4, decrypted, 0, total);
_readOffset += 4 + total;
SSH1Packet p = new SSH1Packet();
p.ConstructAndCheck(decrypted, packet_length, padding_length, _checkMAC);
return p;
}
