//RSA authentication
private void DoRSAChallengeResponse()
{
//read key
SSH1UserAuthKey key = new SSH1UserAuthKey(_param.IdentityFile, _param.Password);
SSH1DataWriter w = new SSH1DataWriter();
w.Write(key.PublicModulus);
SSH1Packet p = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_AUTH_RSA, w.ToByteArray());
p.WriteTo(_stream, _tCipher);
p = ReceivePacket();
if (p.Type == PacketType.SSH_SMSG_FAILURE)
{
throw new SSHException(Strings.GetString("ServerRefusedRSA"));
}
else if (p.Type != PacketType.SSH_SMSG_AUTH_RSA_CHALLENGE)
{
throw new SSHException(String.Format(Strings.GetString("UnexpectedResponse"), p.Type));
}
//creating challenge
SSH1DataReader r = new SSH1DataReader(p.Data);
BigInteger challenge = key.decryptChallenge(r.ReadMPInt());
byte[] rawchallenge = RSAUtil.StripPKCS1Pad(challenge, 2).getBytes();
//building response
MemoryStream bos = new MemoryStream();
bos.Write(rawchallenge, 0, rawchallenge.Length); //!!mindtermでは頭が０かどうかで変なハンドリングがあった
bos.Write(_sessionID, 0, _sessionID.Length);
byte[] response = new MD5CryptoServiceProvider().ComputeHash(bos.ToArray());
w = new SSH1DataWriter();
w.Write(response);
p = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_AUTH_RSA_RESPONSE, w.ToByteArray());
p.WriteTo(_stream, _tCipher);
}
//RSA authentication
private void DoRSAChallengeResponse()
{
//read key
SSH1UserAuthKey key = new SSH1UserAuthKey(_param.IdentityFile, _param.Password);
SSH1DataWriter w = new SSH1DataWriter();
w.Write(key.PublicModulus);
SSH1Packet p = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_AUTH_RSA, w.ToByteArray());
p.WriteTo(_stream, _tCipher);
p = ReceivePacket();
if(p.Type==PacketType.SSH_SMSG_FAILURE)
throw new SSHException(Strings.GetString("ServerRefusedRSA"));
else if(p.Type!=PacketType.SSH_SMSG_AUTH_RSA_CHALLENGE)
throw new SSHException(String.Format(Strings.GetString("UnexpectedResponse"), p.Type));
//creating challenge
SSH1DataReader r = new SSH1DataReader(p.Data);
BigInteger challenge = key.decryptChallenge(r.ReadMPInt());
byte[] rawchallenge = RSAUtil.StripPKCS1Pad(challenge, 2).getBytes();
//building response
MemoryStream bos = new MemoryStream();
bos.Write(rawchallenge, 0, rawchallenge.Length); //!!mindterm�ł͓����O���ǂ����ŕςȃn���h�����O��������
bos.Write(_sessionID, 0, _sessionID.Length);
byte[] response = new MD5CryptoServiceProvider().ComputeHash(bos.ToArray());
w = new SSH1DataWriter();
w.Write(response);
p = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_AUTH_RSA_RESPONSE, w.ToByteArray());
p.WriteTo(_stream, _tCipher);
}
