Exemple #1
0
 static SftpATTRS getATTR(Buffer buf) {
   SftpATTRS attr = new SftpATTRS();
   attr.flags = buf.getInt();
   if ((attr.flags & SSH_FILEXFER_ATTR_SIZE) != 0) {
     attr.size = buf.getLong();
   }
   if ((attr.flags & SSH_FILEXFER_ATTR_UIDGID) != 0) {
     attr.uid = buf.getInt();
     attr.gid = buf.getInt();
   }
   if ((attr.flags & SSH_FILEXFER_ATTR_PERMISSIONS) != 0) {
     attr.permissions = buf.getInt();
   }
   if ((attr.flags & SSH_FILEXFER_ATTR_ACMODTIME) != 0) {
     attr.atime = buf.getInt();
   }
   if ((attr.flags & SSH_FILEXFER_ATTR_ACMODTIME) != 0) {
     attr.mtime = buf.getInt();
   }
   if ((attr.flags & SSH_FILEXFER_ATTR_EXTENDED) != 0) {
     int count = buf.getInt();
     if (count > 0) {
       attr.extended = new String[count * 2];
       for (int i = 0; i < count; i++) {
         attr.extended[i * 2] = Util.byte2str(buf.getString());
         attr.extended[i * 2 + 1] = Util.byte2str(buf.getString());
       }
     }
   }
   return attr;
 }
Exemple #2
0
 private void readValues(Buffer stream, int i) {
   do {
     int opcode = stream.getUnsignedByte();
     if (opcode == 0) return;
     if (opcode == 1) stream.getUnsignedByte();
     else if (opcode == 2) stream.getUnsignedByte();
     else if (opcode == 3) anIntArray703[anInt702++] = i;
     else if (opcode == 4) {
     } // dummy
     else if (opcode == 5) type = stream.getUnsignedLEShort();
     else if (opcode == 6) {
     } // dummy
     else if (opcode == 7) stream.getInt();
     else if (opcode == 8) aBoolean713 = true;
     else if (opcode == 10) stream.getString();
     else if (opcode == 11) aBoolean713 = true;
     else if (opcode == 12) stream.getInt();
     else if (opcode == 13) {
     } // dummy
     else System.out.println("Error unrecognised config code: " + opcode);
   } while (true);
 }
  public boolean next(Buffer _buf) throws Exception {
    int i, 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.err.println("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((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;
        // 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 != SSH_MSG_KEX_DH_GEX_REPLY) {
          System.err.println("type: must be SSH_MSG_KEX_DH_GEX_REPLY " + j);
          return false;
        }

        K_S = _buf.getString();

        byte[] f = _buf.getMPInt();
        byte[] sig_of_H = _buf.getString();

        dh.setF(f);

        dh.checkRange();

        K = normalize(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) & 0xff000000)
                | ((K_S[i++] << 16) & 0x00ff0000)
                | ((K_S[i++] << 8) & 0x0000ff00)
                | ((K_S[i++]) & 0x000000ff);
        String alg = Util.byte2str(K_S, i, j);
        i += j;

        boolean result = verify(alg, K_S, i, sig_of_H);

        state = STATE_END;
        return result;
    }
    return false;
  }