public decryptChallenge ( |
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encryptedchallenge | ||
Résultat |
//RSA authentication private void DoRSAChallengeResponse() { //read key SSH1UserAuthKey key = new SSH1UserAuthKey(_param.IdentityFile, _param.Password); SSH1DataWriter w = new SSH1DataWriter(); w.WriteBigInteger(key.PublicModulus); SSH1Packet p = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_AUTH_RSA, w.ToByteArray()); p.WriteTo(_stream, _tCipher); TraceTransmissionEvent(PacketType.SSH_CMSG_AUTH_RSA, "RSA challenge-reponse"); DataFragment response = ReceivePacket(); SSH1DataReader reader = new SSH1DataReader(response); PacketType pt = reader.ReadPacketType(); if (pt == PacketType.SSH_SMSG_FAILURE) { throw new SSHException(Strings.GetString("ServerRefusedRSA")); } else if (pt != PacketType.SSH_SMSG_AUTH_RSA_CHALLENGE) { throw new SSHException(String.Format(Strings.GetString("UnexpectedResponse"), pt)); } TraceReceptionEvent(PacketType.SSH_SMSG_AUTH_RSA_CHALLENGE, "received challenge"); //creating challenge BigInteger challenge = key.decryptChallenge(reader.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[] reply = new MD5CryptoServiceProvider().ComputeHash(bos.ToArray()); w = new SSH1DataWriter(); w.Write(reply); p = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_AUTH_RSA_RESPONSE, w.ToByteArray()); p.WriteTo(_stream, _tCipher); TraceReceptionEvent(PacketType.SSH_CMSG_AUTH_RSA_RESPONSE, "received response"); }
//RSA authentication private void DoRSAChallengeResponse() { //read key SSH1UserAuthKey key = new SSH1UserAuthKey(_param.IdentityFile, _param.Password); Transmit( new SSH1Packet(SSH1PacketType.SSH_CMSG_AUTH_RSA) .WriteBigInteger(key.PublicModulus) ); TraceTransmissionEvent(SSH1PacketType.SSH_CMSG_AUTH_RSA, "RSA challenge-reponse"); DataFragment response = ReceivePacket(); SSH1DataReader reader = new SSH1DataReader(response); SSH1PacketType pt = (SSH1PacketType) reader.ReadByte(); if (pt == SSH1PacketType.SSH_SMSG_FAILURE) throw new SSHException(Strings.GetString("ServerRefusedRSA")); else if (pt != SSH1PacketType.SSH_SMSG_AUTH_RSA_CHALLENGE) throw new SSHException(String.Format(Strings.GetString("UnexpectedResponse"), pt)); TraceReceptionEvent(SSH1PacketType.SSH_SMSG_AUTH_RSA_CHALLENGE, "received challenge"); //creating challenge BigInteger challenge = key.decryptChallenge(reader.ReadMPInt()); byte[] rawchallenge = RSAUtil.StripPKCS1Pad(challenge, 2).GetBytes(); //building response byte[] hash; using (MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider()) { md5.TransformBlock(rawchallenge, 0, rawchallenge.Length, rawchallenge, 0); md5.TransformFinalBlock(_sessionID, 0, _sessionID.Length); hash = md5.Hash; } Transmit( new SSH1Packet(SSH1PacketType.SSH_CMSG_AUTH_RSA_RESPONSE) .Write(hash) ); TraceReceptionEvent(SSH1PacketType.SSH_CMSG_AUTH_RSA_RESPONSE, "received response"); }
//RSA authentication private void DoRSAChallengeResponse() { //read key SSH1UserAuthKey key = new SSH1UserAuthKey(_param.IdentityFile, _param.Password); SSH1DataWriter w = new SSH1DataWriter(); w.WriteBigInteger(key.PublicModulus); SSH1Packet p = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_AUTH_RSA, w.ToByteArray()); p.WriteTo(_stream, _tCipher); TraceTransmissionEvent(PacketType.SSH_CMSG_AUTH_RSA, "RSA challenge-reponse"); DataFragment response = ReceivePacket(); SSH1DataReader reader = new SSH1DataReader(response); PacketType pt = reader.ReadPacketType(); if (pt == PacketType.SSH_SMSG_FAILURE) throw new SSHException(Strings.GetString("ServerRefusedRSA")); else if (pt != PacketType.SSH_SMSG_AUTH_RSA_CHALLENGE) throw new SSHException(String.Format(Strings.GetString("UnexpectedResponse"), pt)); TraceReceptionEvent(PacketType.SSH_SMSG_AUTH_RSA_CHALLENGE, "received challenge"); //creating challenge BigInteger challenge = key.decryptChallenge(reader.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[] reply = new MD5CryptoServiceProvider().ComputeHash(bos.ToArray()); w = new SSH1DataWriter(); w.Write(reply); p = SSH1Packet.FromPlainPayload(PacketType.SSH_CMSG_AUTH_RSA_RESPONSE, w.ToByteArray()); p.WriteTo(_stream, _tCipher); TraceReceptionEvent(PacketType.SSH_CMSG_AUTH_RSA_RESPONSE, "received response"); }