git.sesse.net Git - rdpsrv/blob - rdp5.c

   1 /* -*- c-basic-offset: 8 -*-
   2    rdesktop: A Remote Desktop Protocol client.
   3    Protocol services - Multipoint Communications Service
   4    Copyright (C) Matthew Chapman 1999-2002
   5    Copyright (C) Erik Forsberg 2003
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "rdesktop.h"
  23
  24 extern uint8 *g_next_packet;
  25 extern int listen_on_vnc;
  26
  27 extern uint8 sec_sign_key[16];
  28 extern int rc4_key_len;
  29
  30 /* Initialise secure transport packet */
  31 STREAM
  32 rdp5_init(int maxlen, BOOL encryption)
  33 {
  34         int hdrlen;
  35         STREAM s;
  36
  37         hdrlen = encryption ? 11 : 3;
  38         s = tcp_init(maxlen + hdrlen);
  39         s_push_layer(s, sec_hdr, hdrlen);
  40
  41         return s;
  42 }
  43
  44 void
  45 rdp5_send(STREAM s, BOOL encryption)
  46 {
  47         int datalen;
  48
  49         s_pop_layer(s, sec_hdr);
  50
  51         datalen = s->end - s->p;
  52
  53         out_uint8(s, encryption ? 0x80 : 0);    // protocol
  54         out_uint8(s, 0x80 | (datalen >> 8));
  55         out_uint8(s, datalen & 0xff);
  56
  57         if (encryption) {
  58                 datalen -= 11;
  59
  60                 sec_sign(s->p, 8, sec_sign_key, rc4_key_len, s->p + 8, datalen);
  61                 sec_encrypt(s->p + 8, datalen);
  62         }
  63
  64         tcp_send(s);
  65 }
  66
  67 void
  68 rdp5_process(STREAM s, BOOL encryption)
  69 {
  70         uint16 length, count, x, y;
  71         uint8 type;
  72         uint8 *next;
  73
  74         if (encryption)
  75         {
  76                 in_uint8s(s, 8);        /* signature */
  77                 sec_decrypt(s->p, s->end - s->p);
  78         }
  79
  80 #if 1
  81         printf("RDP5 data:\n");
  82         hexdump(s->p, s->end - s->p);
  83 #endif
  84
  85         while (s->p < s->end)
  86         {
  87                 in_uint8(s, type);
  88
  89                 switch (type)
  90                 {
  91                         case 16 ... 31:
  92                                 // unknown, but looks like some sort of
  93                                 // "count" of how many packets there are
  94                                 printf("Unimplemented RDP5 opcode (count?) %d, skipping\n", type);
  95                                 break;
  96                         case 32: { // mouse
  97                                 listen_on_vnc = 1;
  98                                 uint16 device_flags, x, y;
  99                                 static int mouse1_down = 0, mouse2_down = 0;
 100
 101                                 in_uint16_le(s, device_flags);
 102                                 in_uint16_le(s, x);
 103                                 in_uint16_le(s, y);
 104
 105                                 printf("- Type: Mouse\n");
 106                                 printf("- Device flags: %x\n", device_flags);
 107                                 printf("- Position: (%u,%u)\n", x, y);
 108
 109                                 if (device_flags & MOUSE_FLAG_BUTTON1)
 110                                         mouse1_down = (device_flags & MOUSE_FLAG_DOWN) ? 0x01 : 0;
 111                                 if (device_flags & MOUSE_FLAG_BUTTON2)
 112                                         mouse2_down = (device_flags & MOUSE_FLAG_DOWN) ? 0x02 : 0;
 113
 114                                 printf("button mask = %x\n", mouse1_down | mouse2_down);
 115
 116                         /*      buf[0] = 5; // message type
 117                                 buf[1] = mouse1_down | mouse2_down; // button mask
 118                                 buf[2] = param1 >> 8;
 119                                 buf[3] = param1 & 0xff;
 120                                 buf[4] = param2 >> 8;
 121                                 buf[5] = param2 & 0xff;
 122                                 write(vnc_sock, buf, 6); */
 123
 124                                 break;
 125                         }
 126                         default:
 127                                 printf("Unimplemented RDP5 opcode %d\n", type);
 128                                 return;
 129                 }
 130         }
 131 }