Example #1
0
        public override void init(Session session,
                                  byte[] V_S, byte[] V_C, byte[] I_S, byte[] I_C)
        {
            this.session = session;
            this.V_S     = V_S;
            this.V_C     = V_C;
            this.I_S     = I_S;
            this.I_C     = I_C;

            //    sha=new SHA1();
            //    sha.init();
            try
            {
                Type t = Type.GetType(session.getConfig("sha-1"));
                sha = (HASH)(Activator.CreateInstance(t));
                sha.init();
            }
            catch (Exception ee)
            {
                Console.WriteLine(ee);
            }

            buf    = new Buffer();
            packet = new Packet(buf);

            try
            {
                Type t = Type.GetType(session.getConfig("dh"));
                dh = (DH)(Activator.CreateInstance(t));
                dh.init();
            }
            catch (Exception ee)
            {
                throw ee;
            }

            dh.setP(p);
            dh.setG(g);

            // The client responds with:
            // byte  SSH_MSG_KEXDH_INIT(30)
            // mpint e <- g^x mod p
            //         x is a random number (1 < x < (p-1)/2)

            e = dh.getE();

            packet.reset();
            buf.WriteByte((byte)SSH_MSG_KEXDH_INIT);
            buf.WriteMPInt(e);
            session.write(packet);

            state = SSH_MSG_KEXDH_REPLY;
        }
Example #2
0
        public static void test()
        {
            JSch jsch = new JSch();
            DH   dh1  = null;
            DH   dh2  = null;

            try
            {
                Type t = Type.GetType(jsch.getConfig("dh"));
                dh1 = (DH)(Activator.CreateInstance(t));
                dh1.init();
                dh2 = (DH)(Activator.CreateInstance(t));
                dh2.init();
            }
            catch (Exception ee)
            {
                Console.WriteLine(ee);
            }

            dh1.setP(DHG1.p);
            dh1.setG(DHG1.g);
            dh2.setP(DHG1.p);
            dh2.setG(DHG1.g);

            // The client responds with:
            // byte  SSH_MSG_KEXDH_INIT(30)
            // mpint e <- g^x mod p
            //         x is a random number (1 < x < (p-1)/2)

            byte[] e = dh1.getE();
            byte[] f = dh2.getE();
            Console.WriteLine("Private1 = {0}", hex(e));
            Console.WriteLine();
            Console.WriteLine("Private2 = {0}", hex(f));
            Console.WriteLine();
            dh1.setF(f);
            dh2.setF(e);
            byte[] k1 = dh1.getK();
            byte[] k2 = dh2.getK();
            Console.WriteLine("Public1 = {0}", hex(k1));
            Console.WriteLine();
            Console.WriteLine("Public2 = {0}", hex(k2));
            Console.WriteLine();
        }
Example #3
0
		public override void init(Session session,
			byte[] V_S, byte[] V_C, byte[] I_S, byte[] I_C) 
		{
			this.session=session;
			this.V_S=V_S;      
			this.V_C=V_C;      
			this.I_S=I_S;      
			this.I_C=I_C;      

			//    sha=new SHA1();
			//    sha.init();
			try
			{
				Type t=Type.GetType(session.getConfig("sha-1"));
				sha=(HASH)(Activator.CreateInstance(t));
				sha.init();
			}
			catch(Exception ee)
			{
				Console.WriteLine(ee);
			}

			buf=new Buffer();
			packet=new Packet(buf);

			try
			{
				Type t=Type.GetType(session.getConfig("dh"));
				dh=(DH)(Activator.CreateInstance(t));
				dh.init();
			}
			catch(Exception ee)
			{
				throw ee;
			}

			dh.setP(p);
			dh.setG(g);

			// The client responds with:
			// byte  SSH_MSG_KEXDH_INIT(30)
			// mpint e <- g^x mod p
			//         x is a random number (1 < x < (p-1)/2)

			e=dh.getE();

			packet.reset();
			buf.putByte((byte)SSH_MSG_KEXDH_INIT);
			buf.putMPInt(e);
			session.write(packet);

			state=SSH_MSG_KEXDH_REPLY;
		}
Example #4
0
        public override bool next(Buffer _buf)
        {
            int  i, j;
            bool result = false;

            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 != 31)
                {
                    Console.WriteLine("type: must be 31 " + j);
                    result = false;
                }

                p = _buf.getMPInt();
                g = _buf.getMPInt();

                /*
                 * for(int iii=0; iii<p.length; iii++){
                 * System.out.println("0x"+Integer.toHexString(p[iii]&0xff)+",");
                 * }
                 * System.out.println("");
                 * for(int iii=0; iii<g.length; iii++){
                 * System.out.println("0x"+Integer.toHexString(g[iii]&0xff)+",");
                 * }
                 */
                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((byte)0x20);
                buf.putMPInt(e);
                session.write(packet);

                state  = SSH_MSG_KEX_DH_GEX_REPLY;
                result = true;
                break;

            case SSH_MSG_KEX_DH_GEX_REPLY:
                // 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 != 33)
                {
                    Console.WriteLine("type: must be 33 " + j);
                    result = 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.out.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.out.print("H -> "); dump(H, 0, H.length);

                i = 0;
                j = 0;
                j = (int)((K_S[i++] << 24) & 0xff000000) | ((K_S[i++] << 16) & 0x00ff0000) |
                    ((K_S[i++] << 8) & 0x0000ff00) | ((K_S[i++]) & 0x000000ff);
                String alg = Util.getString(K_S, i, j);
                i += j;


                if (alg.Equals("ssh-rsa"))
                {
                    byte[] tmp;
                    byte[] ee;
                    byte[] n;

                    type = RSA;

                    j = (int)((K_S[i++] << 24) & 0xff000000) | ((K_S[i++] << 16) & 0x00ff0000) |
                        ((K_S[i++] << 8) & 0x0000ff00) | ((K_S[i++]) & 0x000000ff);
                    tmp = new byte[j]; Array.Copy(K_S, i, tmp, 0, j); i += j;
                    ee  = tmp;
                    j   = (int)((K_S[i++] << 24) & 0xff000000) | ((K_S[i++] << 16) & 0x00ff0000) |
                          ((K_S[i++] << 8) & 0x0000ff00) | ((K_S[i++]) & 0x000000ff);
                    tmp = new byte[j]; Array.Copy(K_S, i, tmp, 0, j); i += j;
                    n   = tmp;

                    //	SignatureRSA sig=new SignatureRSA();
                    //	sig.init();

                    SignatureRSA sig = null;
                    try
                    {
                        Type t = Type.GetType(session.getConfig("signature.rsa"));
                        sig = (SignatureRSA)(Activator.CreateInstance(t));
                        sig.init();
                    }
                    catch (Exception eee)
                    {
                        Console.WriteLine(eee);
                    }

                    sig.setPubKey(ee, n);
                    sig.update(H);
                    result = sig.verify(sig_of_H);
                }
                else if (alg.Equals("ssh-dss"))
                {
                    byte[] q = null;
                    byte[] tmp;

                    type = DSS;

                    j = (int)((K_S[i++] << 24) & 0xff000000) | ((K_S[i++] << 16) & 0x00ff0000) |
                        ((K_S[i++] << 8) & 0x0000ff00) | ((K_S[i++]) & 0x000000ff);
                    tmp = new byte[j]; Array.Copy(K_S, i, tmp, 0, j); i += j;
                    p   = tmp;
                    j   = (int)((K_S[i++] << 24) & 0xff000000) | ((K_S[i++] << 16) & 0x00ff0000) |
                          ((K_S[i++] << 8) & 0x0000ff00) | ((K_S[i++]) & 0x000000ff);
                    tmp = new byte[j]; Array.Copy(K_S, i, tmp, 0, j); i += j;
                    q   = tmp;
                    j   = (int)((K_S[i++] << 24) & 0xff000000) | ((K_S[i++] << 16) & 0x00ff0000) |
                          ((K_S[i++] << 8) & 0x0000ff00) | ((K_S[i++]) & 0x000000ff);
                    tmp = new byte[j]; Array.Copy(K_S, i, tmp, 0, j); i += j;
                    g   = tmp;
                    j   = (int)((K_S[i++] << 24) & 0xff000000) | ((K_S[i++] << 16) & 0x00ff0000) |
                          ((K_S[i++] << 8) & 0x0000ff00) | ((K_S[i++]) & 0x000000ff);
                    tmp = new byte[j]; Array.Copy(K_S, i, tmp, 0, j); i += j;
                    f   = tmp;

                    //	SignatureDSA sig=new SignatureDSA();
                    //	sig.init();

                    SignatureDSA sig = null;
                    try
                    {
                        Type t = Type.GetType(session.getConfig("signature.dss"));
                        sig = (SignatureDSA)(Activator.CreateInstance(t));
                        sig.init();
                    }
                    catch (Exception ee)
                    {
                        Console.WriteLine(ee);
                    }

                    sig.setPubKey(f, p, q, g);
                    sig.update(H);
                    result = sig.verify(sig_of_H);
                }
                else
                {
                    Console.WriteLine("unknow alg");
                }
                state = STATE_END;
                break;
            }
            return(result);
        }
Example #5
0
        public override void init(Session session,
                                  byte[] V_S, byte[] V_C, byte[] I_S, byte[] I_C)
        {
            this.session = session;
            this.V_S     = V_S;
            this.V_C     = V_C;
            this.I_S     = I_S;
            this.I_C     = I_C;

            //    sha=new SHA1();
            //    sha.init();
            try
            {
                Type c = Type.GetType(session.getConfig("sha-1"));
                sha = (HASH)(c.newInstance());
                sha.init();
            }
            catch (Exception ee)
            {
                Console.Error.WriteLine(ee);
            }

            buf    = new Buffer();
            packet = new Packet(buf);

            try
            {
                Type c = Type.GetType(session.getConfig("dh"));
                dh = (DH)(c.newInstance());
                dh.init();
            }
            catch (Exception ee)
            {
                //Console.Error.WriteLine(e);
                throw ee;
            }

            dh.setP(p);
            dh.setG(g);

            // The client responds with:
            // byte  SSH_MSG_KEXDH_INIT(30)
            // mpint e <- g^x mod p
            //         x is a random number (1 < x < (p-1)/2)

            e = dh.getE();

            packet.reset();
            buf.putByte((byte)SSH_MSG_KEXDH_INIT);
            buf.putMPInt(e);
            session.write(packet);

            if (JSch.getLogger().isEnabled(Logger.INFO))
            {
                JSch.getLogger().log(Logger.INFO,
                                     "SSH_MSG_KEXDH_INIT sent");
                JSch.getLogger().log(Logger.INFO,
                                     "expecting SSH_MSG_KEXDH_REPLY");
            }

            state = SSH_MSG_KEXDH_REPLY;
        }
Example #6
0
        public override void init(Session session,
            byte[] V_S, byte[] V_C, byte[] I_S, byte[] I_C)
        {
            this.session = session;
            this.V_S = V_S;
            this.V_C = V_C;
            this.I_S = I_S;
            this.I_C = I_C;

            //    sha=new SHA1();
            //    sha.init();
            try
            {
                Type c = Type.GetType(session.getConfig("sha-1"));
                sha = (HASH)(c.newInstance());
                sha.init();
            }
            catch (Exception ee)
            {
                Console.Error.WriteLine(ee);
            }

            buf = new Buffer();
            packet = new Packet(buf);

            try
            {
                Type c = Type.GetType(session.getConfig("dh"));
                dh = (DH)(c.newInstance());
                dh.init();
            }
            catch (Exception ee)
            {
                //Console.Error.WriteLine(e);
                throw ee;
            }

            dh.setP(p);
            dh.setG(g);

            // The client responds with:
            // byte  SSH_MSG_KEXDH_INIT(30)
            // mpint e <- g^x mod p
            //         x is a random number (1 < x < (p-1)/2)

            e = dh.getE();

            packet.reset();
            buf.putByte((byte)SSH_MSG_KEXDH_INIT);
            buf.putMPInt(e);
            session.write(packet);

            if (JSch.getLogger().isEnabled(Logger.INFO))
            {
                JSch.getLogger().log(Logger.INFO,
                                     "SSH_MSG_KEXDH_INIT sent");
                JSch.getLogger().log(Logger.INFO,
                                     "expecting SSH_MSG_KEXDH_REPLY");
            }

            state = SSH_MSG_KEXDH_REPLY;
        }