/// <summary>
///
/// </summary>
/// <param name="clientId"></param>
/// <param name="serverId"></param>
/// <param name="clientKexInit"></param>
/// <param name="serverKexInit"></param>
public override void PerformClientExchange(String clientId,
String serverId,
byte[] clientKexInit,
byte[] serverKexInit)
{
this.clientId = clientId;
this.serverId = serverId;
this.clientKexInit = clientKexInit;
this.serverKexInit = serverKexInit;
BigInteger q = p.subtract(BigInteger.ONE).divide(g);
do
{
x = new BigInteger(p.bitLength(), new RNGCryptoServiceProvider());
}while((x.compareTo(BigInteger.ONE) < 0) &&
(x.compareTo(q) > 0));
e = g.modPow(x, p);
if (e.compareTo(BigInteger.ONE) < 0 ||
e.compareTo(p.subtract(BigInteger.ONE)) > 0)
{
throw new SSHException("Key exchange failed to generate e value", SSHException.INTERNAL_ERROR);
}
SSHPacket packet = transport.GetSSHPacket(true);
packet.WriteByte(SSH_MSG_KEXDH_INIT);
packet.WriteBigInteger(e);
transport.SendMessage(packet);
packet = transport.NextMessage();
if (packet.MessageID != SSH_MSG_KEXDH_REPLY)
{
throw new SSHException("Expected SSH_MSG_KEXDH_REPLY but got message id "
+ packet.MessageID, SSHException.KEY_EXCHANGE_FAILED);
}
hostKey = packet.ReadBinaryString();
f = packet.ReadBigInteger();
signature = packet.ReadBinaryString();
secret = f.modPow(x, p);
CalculateExchangeHash();
}