// OID 1.2.840.113554.1.2.2 in DER
/// <exception cref="System.Exception"></exception>
public override bool Start(Session session)
{
base.Start(session);
byte[] _username = Util.Str2byte(username);
packet.Reset();
// byte SSH_MSG_USERAUTH_REQUEST(50)
// string user name(in ISO-10646 UTF-8 encoding)
// string service name(in US-ASCII)
// string "gssapi"(US-ASCII)
// uint32 n, the number of OIDs client supports
// string[n] mechanism OIDS
buf.PutByte(unchecked ((byte)SSH_MSG_USERAUTH_REQUEST));
buf.PutString(_username);
buf.PutString(Util.Str2byte("ssh-connection"));
buf.PutString(Util.Str2byte("gssapi-with-mic"));
buf.PutInt(supported_oid.Length);
for (int i = 0; i < supported_oid.Length; i++)
{
buf.PutString(supported_oid[i]);
}
session.Write(packet);
string method = null;
int command;
while (true)
{
buf = session.Read(buf);
command = buf.GetCommand() & unchecked ((int)(0xff));
if (command == SSH_MSG_USERAUTH_FAILURE)
{
return(false);
}
if (command == SSH_MSG_USERAUTH_GSSAPI_RESPONSE)
{
buf.GetInt();
buf.GetByte();
buf.GetByte();
byte[] message = buf.GetString();
for (int i_1 = 0; i_1 < supported_oid.Length; i_1++)
{
if (Util.Array_equals(message, supported_oid[i_1]))
{
method = supported_method[i_1];
break;
}
}
if (method == null)
{
return(false);
}
break;
}
// success
if (command == SSH_MSG_USERAUTH_BANNER)
{
buf.GetInt();
buf.GetByte();
buf.GetByte();
byte[] _message = buf.GetString();
byte[] lang = buf.GetString();
string message = Util.Byte2str(_message);
if (userinfo != null)
{
userinfo.ShowMessage(message);
}
continue;
}
return(false);
}
NSch.GSSContext context = null;
try
{
Type c = Sharpen.Runtime.GetType(session.GetConfig(method));
context = (NSch.GSSContext)(System.Activator.CreateInstance(c));
}
catch (Exception)
{
return(false);
}
try
{
context.Create(username, session.host);
}
catch (JSchException)
{
return(false);
}
byte[] token = new byte[0];
while (!context.IsEstablished())
{
try
{
token = context.Init(token, 0, token.Length);
}
catch (JSchException)
{
// TODO
// ERRTOK should be sent?
// byte SSH_MSG_USERAUTH_GSSAPI_ERRTOK
// string error token
return(false);
}
if (token != null)
{
packet.Reset();
buf.PutByte(unchecked ((byte)SSH_MSG_USERAUTH_GSSAPI_TOKEN));
buf.PutString(token);
session.Write(packet);
}
if (!context.IsEstablished())
{
buf = session.Read(buf);
command = buf.GetCommand() & unchecked ((int)(0xff));
if (command == SSH_MSG_USERAUTH_GSSAPI_ERROR)
{
// uint32 major_status
// uint32 minor_status
// string message
// string language tag
buf = session.Read(buf);
command = buf.GetCommand() & unchecked ((int)(0xff));
}
else
{
//return false;
if (command == SSH_MSG_USERAUTH_GSSAPI_ERRTOK)
{
// string error token
buf = session.Read(buf);
command = buf.GetCommand() & unchecked ((int)(0xff));
}
}
//return false;
if (command == SSH_MSG_USERAUTH_FAILURE)
{
return(false);
}
buf.GetInt();
buf.GetByte();
buf.GetByte();
token = buf.GetString();
}
}
Buffer mbuf = new Buffer();
// string session identifier
// byte SSH_MSG_USERAUTH_REQUEST
// string user name
// string service
// string "gssapi-with-mic"
mbuf.PutString(session.GetSessionId());
mbuf.PutByte(unchecked ((byte)SSH_MSG_USERAUTH_REQUEST));
mbuf.PutString(_username);
mbuf.PutString(Util.Str2byte("ssh-connection"));
mbuf.PutString(Util.Str2byte("gssapi-with-mic"));
byte[] mic = context.GetMIC(mbuf.buffer, 0, mbuf.GetLength());
if (mic == null)
{
return(false);
}
packet.Reset();
buf.PutByte(unchecked ((byte)SSH_MSG_USERAUTH_GSSAPI_MIC));
buf.PutString(mic);
session.Write(packet);
context.Dispose();
buf = session.Read(buf);
command = buf.GetCommand() & unchecked ((int)(0xff));
if (command == SSH_MSG_USERAUTH_SUCCESS)
{
return(true);
}
else
{
if (command == SSH_MSG_USERAUTH_FAILURE)
{
buf.GetInt();
buf.GetByte();
buf.GetByte();
byte[] foo = buf.GetString();
int partial_success = buf.GetByte();
//System.err.println(new String(foo)+
// " partial_success:"+(partial_success!=0));
if (partial_success != 0)
{
throw new JSchPartialAuthException(Util.Byte2str(foo));
}
}
}
return(false);
}
/// <exception cref="System.IO.IOException"></exception>
internal override void Write(byte[] foo, int s, int l)
{
if (packet == null)
{
wbuf = new Buffer(rmpsize);
packet = new Packet(wbuf);
}
rbuf.Shift();
if (rbuf.buffer.Length < rbuf.index + l)
{
byte[] newbuf = new byte[rbuf.s + l];
System.Array.Copy(rbuf.buffer, 0, newbuf, 0, rbuf.buffer.Length);
rbuf.buffer = newbuf;
}
rbuf.PutByte(foo, s, l);
int mlen = rbuf.GetInt();
if (mlen > rbuf.GetLength())
{
rbuf.s -= 4;
return;
}
int typ = rbuf.GetByte();
Session _session = null;
try
{
_session = GetSession();
}
catch (JSchException e)
{
throw new IOException(e.ToString());
}
IdentityRepository irepo = _session.jsch.GetIdentityRepository();
UserInfo userinfo = _session.GetUserInfo();
mbuf.Reset();
if (typ == SSH2_AGENTC_REQUEST_IDENTITIES)
{
mbuf.PutByte(SSH2_AGENT_IDENTITIES_ANSWER);
ArrayList identities = irepo.GetIdentities();
lock (identities)
{
int count = 0;
for (int i = 0; i < identities.Count; i++)
{
Identity identity = (Identity)(identities[i]);
if (identity.GetPublicKeyBlob() != null)
{
count++;
}
}
mbuf.PutInt(count);
for (int i_1 = 0; i_1 < identities.Count; i_1++)
{
Identity identity = (Identity)(identities[i_1]);
byte[] pubkeyblob = identity.GetPublicKeyBlob();
if (pubkeyblob == null)
{
continue;
}
mbuf.PutString(pubkeyblob);
mbuf.PutString(Util.empty);
}
}
}
else
{
if (typ == SSH_AGENTC_REQUEST_RSA_IDENTITIES)
{
mbuf.PutByte(SSH_AGENT_RSA_IDENTITIES_ANSWER);
mbuf.PutInt(0);
}
else
{
if (typ == SSH2_AGENTC_SIGN_REQUEST)
{
byte[] blob = rbuf.GetString();
byte[] data = rbuf.GetString();
int flags = rbuf.GetInt();
// if((flags & 1)!=0){ //SSH_AGENT_OLD_SIGNATURE // old OpenSSH 2.0, 2.1
// datafellows = SSH_BUG_SIGBLOB;
// }
ArrayList identities = irepo.GetIdentities();
Identity identity = null;
lock (identities)
{
for (int i = 0; i < identities.Count; i++)
{
Identity _identity = (Identity)(identities[i]);
if (_identity.GetPublicKeyBlob() == null)
{
continue;
}
if (!Util.Array_equals(blob, _identity.GetPublicKeyBlob()))
{
continue;
}
if (_identity.IsEncrypted())
{
if (userinfo == null)
{
continue;
}
while (_identity.IsEncrypted())
{
if (!userinfo.PromptPassphrase("Passphrase for " + _identity.GetName()))
{
break;
}
string _passphrase = userinfo.GetPassphrase();
if (_passphrase == null)
{
break;
}
byte[] passphrase = Util.Str2byte(_passphrase);
try
{
if (_identity.SetPassphrase(passphrase))
{
break;
}
}
catch (JSchException)
{
break;
}
}
}
if (!_identity.IsEncrypted())
{
identity = _identity;
break;
}
}
}
byte[] signature = null;
if (identity != null)
{
signature = identity.GetSignature(data);
}
if (signature == null)
{
mbuf.PutByte(SSH2_AGENT_FAILURE);
}
else
{
mbuf.PutByte(SSH2_AGENT_SIGN_RESPONSE);
mbuf.PutString(signature);
}
}
else
{
if (typ == SSH2_AGENTC_REMOVE_IDENTITY)
{
byte[] blob = rbuf.GetString();
irepo.Remove(blob);
mbuf.PutByte(SSH_AGENT_SUCCESS);
}
else
{
if (typ == SSH_AGENTC_REMOVE_ALL_RSA_IDENTITIES)
{
mbuf.PutByte(SSH_AGENT_SUCCESS);
}
else
{
if (typ == SSH2_AGENTC_REMOVE_ALL_IDENTITIES)
{
irepo.RemoveAll();
mbuf.PutByte(SSH_AGENT_SUCCESS);
}
else
{
if (typ == SSH2_AGENTC_ADD_IDENTITY)
{
int fooo = rbuf.GetLength();
byte[] tmp = new byte[fooo];
rbuf.GetByte(tmp);
bool result = irepo.Add(tmp);
mbuf.PutByte(result ? SSH_AGENT_SUCCESS : SSH_AGENT_FAILURE);
}
else
{
rbuf.Skip(rbuf.GetLength() - 1);
mbuf.PutByte(SSH_AGENT_FAILURE);
}
}
}
}
}
}
}
byte[] response = new byte[mbuf.GetLength()];
mbuf.GetByte(response);
Send(response);
}
/// <exception cref="System.Exception"></exception>
public override bool Next(Buffer _buf)
{
int i;
int j;
switch (state)
{
case SSH_MSG_KEX_DH_GEX_GROUP:
{
// byte SSH_MSG_KEX_DH_GEX_GROUP(31)
// mpint p, safe prime
// mpint g, generator for subgroup in GF (p)
_buf.GetInt();
_buf.GetByte();
j = _buf.GetByte();
if (j != SSH_MSG_KEX_DH_GEX_GROUP)
{
System.Console.Error.WriteLine("type: must be SSH_MSG_KEX_DH_GEX_GROUP " + j);
return(false);
}
p = _buf.GetMPInt();
g = _buf.GetMPInt();
dh.SetP(p);
dh.SetG(g);
// The client responds with:
// byte SSH_MSG_KEX_DH_GEX_INIT(32)
// mpint e <- g^x mod p
// x is a random number (1 < x < (p-1)/2)
e = dh.GetE();
packet.Reset();
buf.PutByte(unchecked ((byte)SSH_MSG_KEX_DH_GEX_INIT));
buf.PutMPInt(e);
session.Write(packet);
if (JSch.GetLogger().IsEnabled(Logger.INFO))
{
JSch.GetLogger().Log(Logger.INFO, "SSH_MSG_KEX_DH_GEX_INIT sent");
JSch.GetLogger().Log(Logger.INFO, "expecting SSH_MSG_KEX_DH_GEX_REPLY");
}
state = SSH_MSG_KEX_DH_GEX_REPLY;
return(true);
}
case SSH_MSG_KEX_DH_GEX_REPLY:
{
//break;
// The server responds with:
// byte SSH_MSG_KEX_DH_GEX_REPLY(33)
// string server public host key and certificates (K_S)
// mpint f
// string signature of H
j = _buf.GetInt();
j = _buf.GetByte();
j = _buf.GetByte();
if (j != SSH_MSG_KEX_DH_GEX_REPLY)
{
System.Console.Error.WriteLine("type: must be SSH_MSG_KEX_DH_GEX_REPLY " + j);
return(false);
}
K_S = _buf.GetString();
// K_S is server_key_blob, which includes ....
// string ssh-dss
// impint p of dsa
// impint q of dsa
// impint g of dsa
// impint pub_key of dsa
//System.err.print("K_S: "); dump(K_S, 0, K_S.length);
byte[] f = _buf.GetMPInt();
byte[] sig_of_H = _buf.GetString();
dh.SetF(f);
K = dh.GetK();
//The hash H is computed as the HASH hash of the concatenation of the
//following:
// string V_C, the client's version string (CR and NL excluded)
// string V_S, the server's version string (CR and NL excluded)
// string I_C, the payload of the client's SSH_MSG_KEXINIT
// string I_S, the payload of the server's SSH_MSG_KEXINIT
// string K_S, the host key
// uint32 min, minimal size in bits of an acceptable group
// uint32 n, preferred size in bits of the group the server should send
// uint32 max, maximal size in bits of an acceptable group
// mpint p, safe prime
// mpint g, generator for subgroup
// mpint e, exchange value sent by the client
// mpint f, exchange value sent by the server
// mpint K, the shared secret
// This value is called the exchange hash, and it is used to authenti-
// cate the key exchange.
buf.Reset();
buf.PutString(V_C);
buf.PutString(V_S);
buf.PutString(I_C);
buf.PutString(I_S);
buf.PutString(K_S);
buf.PutInt(min);
buf.PutInt(preferred);
buf.PutInt(max);
buf.PutMPInt(p);
buf.PutMPInt(g);
buf.PutMPInt(e);
buf.PutMPInt(f);
buf.PutMPInt(K);
byte[] foo = new byte[buf.GetLength()];
buf.GetByte(foo);
sha.Update(foo, 0, foo.Length);
H = sha.Digest();
// System.err.print("H -> "); dump(H, 0, H.length);
i = 0;
j = 0;
j = ((K_S[i++] << 24) & unchecked ((int)(0xff000000))) | ((K_S[i++] << 16) & unchecked (
(int)(0x00ff0000))) | ((K_S[i++] << 8) & unchecked ((int)(0x0000ff00))) | ((K_S[i
++]) & unchecked ((int)(0x000000ff)));
string alg = Util.Byte2str(K_S, i, j);
i += j;
bool result = false;
if (alg.Equals("ssh-rsa"))
{
byte[] tmp;
byte[] ee;
byte[] n;
type = RSA;
j = ((K_S[i++] << 24) & unchecked ((int)(0xff000000))) | ((K_S[i++] << 16) & unchecked (
(int)(0x00ff0000))) | ((K_S[i++] << 8) & unchecked ((int)(0x0000ff00))) | ((K_S[i
++]) & unchecked ((int)(0x000000ff)));
tmp = new byte[j];
System.Array.Copy(K_S, i, tmp, 0, j);
i += j;
ee = tmp;
j = ((K_S[i++] << 24) & unchecked ((int)(0xff000000))) | ((K_S[i++] << 16) & unchecked (
(int)(0x00ff0000))) | ((K_S[i++] << 8) & unchecked ((int)(0x0000ff00))) | ((K_S[i
++]) & unchecked ((int)(0x000000ff)));
tmp = new byte[j];
System.Array.Copy(K_S, i, tmp, 0, j);
i += j;
n = tmp;
// SignatureRSA sig=new SignatureRSA();
// sig.init();
NSch.SignatureRSA sig = null;
try
{
Type c = Sharpen.Runtime.GetType(session.GetConfig("signature.rsa"));
sig = (NSch.SignatureRSA)(System.Activator.CreateInstance(c));
sig.Init();
}
catch (Exception ex)
{
System.Console.Error.WriteLine(ex);
}
sig.SetPubKey(ee, n);
sig.Update(H);
result = sig.Verify(sig_of_H);
if (JSch.GetLogger().IsEnabled(Logger.INFO))
{
JSch.GetLogger().Log(Logger.INFO, "ssh_rsa_verify: signature " + result);
}
}
else
{
if (alg.Equals("ssh-dss"))
{
byte[] q = null;
byte[] tmp;
type = DSS;
j = ((K_S[i++] << 24) & unchecked ((int)(0xff000000))) | ((K_S[i++] << 16) & unchecked (
(int)(0x00ff0000))) | ((K_S[i++] << 8) & unchecked ((int)(0x0000ff00))) | ((K_S[i
++]) & unchecked ((int)(0x000000ff)));
tmp = new byte[j];
System.Array.Copy(K_S, i, tmp, 0, j);
i += j;
p = tmp;
j = ((K_S[i++] << 24) & unchecked ((int)(0xff000000))) | ((K_S[i++] << 16) & unchecked (
(int)(0x00ff0000))) | ((K_S[i++] << 8) & unchecked ((int)(0x0000ff00))) | ((K_S[i
++]) & unchecked ((int)(0x000000ff)));
tmp = new byte[j];
System.Array.Copy(K_S, i, tmp, 0, j);
i += j;
q = tmp;
j = ((K_S[i++] << 24) & unchecked ((int)(0xff000000))) | ((K_S[i++] << 16) & unchecked (
(int)(0x00ff0000))) | ((K_S[i++] << 8) & unchecked ((int)(0x0000ff00))) | ((K_S[i
++]) & unchecked ((int)(0x000000ff)));
tmp = new byte[j];
System.Array.Copy(K_S, i, tmp, 0, j);
i += j;
g = tmp;
j = ((K_S[i++] << 24) & unchecked ((int)(0xff000000))) | ((K_S[i++] << 16) & unchecked (
(int)(0x00ff0000))) | ((K_S[i++] << 8) & unchecked ((int)(0x0000ff00))) | ((K_S[i
++]) & unchecked ((int)(0x000000ff)));
tmp = new byte[j];
System.Array.Copy(K_S, i, tmp, 0, j);
i += j;
f = tmp;
// SignatureDSA sig=new SignatureDSA();
// sig.init();
NSch.SignatureDSA sig = null;
try
{
Type c = Sharpen.Runtime.GetType(session.GetConfig("signature.dss"));
sig = (NSch.SignatureDSA)(System.Activator.CreateInstance(c));
sig.Init();
}
catch (Exception ex)
{
System.Console.Error.WriteLine(ex);
}
sig.SetPubKey(f, p, q, g);
sig.Update(H);
result = sig.Verify(sig_of_H);
if (JSch.GetLogger().IsEnabled(Logger.INFO))
{
JSch.GetLogger().Log(Logger.INFO, "ssh_dss_verify: signature " + result);
}
}
else
{
System.Console.Error.WriteLine("unknown alg");
}
}
state = STATE_END;
return(result);
}
}
return(false);
}
