protected internal static string[] Guess(byte[] I_S, byte[] I_C)
{
string[] guess = new string[PROPOSAL_MAX];
Buffer sb = new Buffer(I_S);
sb.SetOffSet(17);
Buffer cb = new Buffer(I_C);
cb.SetOffSet(17);
for (int i = 0; i < PROPOSAL_MAX; i++)
{
byte[] sp = sb.GetString();
// server proposal
byte[] cp = cb.GetString();
// client proposal
int j = 0;
int k = 0;
while (j < cp.Length)
{
while (j < cp.Length && cp[j] != ',')
{
j++;
}
if (k == j)
{
return(null);
}
string algorithm = Util.Byte2str(cp, k, j - k);
int l = 0;
int m = 0;
while (l < sp.Length)
{
while (l < sp.Length && sp[l] != ',')
{
l++;
}
if (m == l)
{
return(null);
}
if (algorithm.Equals(Util.Byte2str(sp, m, l - m)))
{
guess[i] = algorithm;
goto loop_break;
}
l++;
m = l;
}
j++;
k = j;
loop_continue :;
}
loop_break :;
if (j == 0)
{
guess[i] = string.Empty;
}
else
{
if (guess[i] == null)
{
return(null);
}
}
}
if (JSch.GetLogger().IsEnabled(Logger.INFO))
{
JSch.GetLogger().Log(Logger.INFO, "kex: server->client" + " " + guess[PROPOSAL_ENC_ALGS_STOC
] + " " + guess[PROPOSAL_MAC_ALGS_STOC] + " " + guess[PROPOSAL_COMP_ALGS_STOC]);
JSch.GetLogger().Log(Logger.INFO, "kex: client->server" + " " + guess[PROPOSAL_ENC_ALGS_CTOS
] + " " + guess[PROPOSAL_MAC_ALGS_CTOS] + " " + guess[PROPOSAL_COMP_ALGS_CTOS]);
}
// for(int i=0; i<PROPOSAL_MAX; i++){
// System.err.println("guess: ["+guess[i]+"]");
// }
return(guess);
}
/// <exception cref="System.Exception"></exception>
private void Send_kexinit()
{
if (in_kex)
{
return;
}
string cipherc2s = GetConfig("cipher.c2s");
string ciphers2c = GetConfig("cipher.s2c");
string[] not_available = CheckCiphers(GetConfig("CheckCiphers"));
if (not_available != null && not_available.Length > 0)
{
cipherc2s = Util.DiffString(cipherc2s, not_available);
ciphers2c = Util.DiffString(ciphers2c, not_available);
if (cipherc2s == null || ciphers2c == null)
{
throw new JSchException("There are not any available ciphers.");
}
}
in_kex = true;
kex_start_time = Runtime.CurrentTimeMillis();
// byte SSH_MSG_KEXINIT(20)
// byte[16] cookie (random bytes)
// string kex_algorithms
// string server_host_key_algorithms
// string encryption_algorithms_client_to_server
// string encryption_algorithms_server_to_client
// string mac_algorithms_client_to_server
// string mac_algorithms_server_to_client
// string compression_algorithms_client_to_server
// string compression_algorithms_server_to_client
// string languages_client_to_server
// string languages_server_to_client
Buffer buf = new Buffer();
// send_kexinit may be invoked
Packet packet = new Packet(buf);
// by user thread.
packet.Reset();
buf.PutByte(unchecked((byte)SSH_MSG_KEXINIT));
lock (random)
{
random.Fill(buf.buffer, buf.index, 16);
buf.Skip(16);
}
buf.PutString(Util.Str2byte(GetConfig("kex")));
buf.PutString(Util.Str2byte(GetConfig("server_host_key")));
buf.PutString(Util.Str2byte(cipherc2s));
buf.PutString(Util.Str2byte(ciphers2c));
buf.PutString(Util.Str2byte(GetConfig("mac.c2s")));
buf.PutString(Util.Str2byte(GetConfig("mac.s2c")));
buf.PutString(Util.Str2byte(GetConfig("compression.c2s")));
buf.PutString(Util.Str2byte(GetConfig("compression.s2c")));
buf.PutString(Util.Str2byte(GetConfig("lang.c2s")));
buf.PutString(Util.Str2byte(GetConfig("lang.s2c")));
buf.PutByte(unchecked((byte)0));
buf.PutInt(0);
buf.SetOffSet(5);
I_C = new byte[buf.GetLength()];
buf.GetByte(I_C);
Write(packet);
if (JSch.GetLogger().IsEnabled(Logger.INFO))
{
JSch.GetLogger().Log(Logger.INFO, "SSH_MSG_KEXINIT sent");
}
}
protected internal static string[] Guess(byte[] I_S, byte[] I_C)
{
string[] guess = new string[PROPOSAL_MAX];
Buffer sb = new Buffer(I_S);
sb.SetOffSet(17);
Buffer cb = new Buffer(I_C);
cb.SetOffSet(17);
for (int i = 0; i < PROPOSAL_MAX; i++)
{
byte[] sp = sb.GetString();
// server proposal
byte[] cp = cb.GetString();
// client proposal
int j = 0;
int k = 0;
while (j < cp.Length)
{
while (j < cp.Length && cp[j] != ',')
{
j++;
}
if (k == j)
{
return null;
}
string algorithm = Util.Byte2str(cp, k, j - k);
int l = 0;
int m = 0;
while (l < sp.Length)
{
while (l < sp.Length && sp[l] != ',')
{
l++;
}
if (m == l)
{
return null;
}
if (algorithm.Equals(Util.Byte2str(sp, m, l - m)))
{
guess[i] = algorithm;
goto loop_break;
}
l++;
m = l;
}
j++;
k = j;
loop_continue: ;
}
loop_break: ;
if (j == 0)
{
guess[i] = string.Empty;
}
else
{
if (guess[i] == null)
{
return null;
}
}
}
if (JSch.GetLogger().IsEnabled(Logger.INFO))
{
JSch.GetLogger().Log(Logger.INFO, "kex: server->client" + " " + guess[PROPOSAL_ENC_ALGS_STOC
] + " " + guess[PROPOSAL_MAC_ALGS_STOC] + " " + guess[PROPOSAL_COMP_ALGS_STOC]);
JSch.GetLogger().Log(Logger.INFO, "kex: client->server" + " " + guess[PROPOSAL_ENC_ALGS_CTOS
] + " " + guess[PROPOSAL_MAC_ALGS_CTOS] + " " + guess[PROPOSAL_COMP_ALGS_CTOS]);
}
// for(int i=0; i<PROPOSAL_MAX; i++){
// System.err.println("guess: ["+guess[i]+"]");
// }
return guess;
}