/[rdesktop]/sourceforge.net/trunk/rdesktop/licence.c
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Diff of /sourceforge.net/trunk/rdesktop/licence.c

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revision 82 by astrand, Tue Jul 30 07:18:48 2002 UTC revision 366 by matthewc, Wed Apr 16 12:52:46 2003 UTC
# Line 1  Line 1 
1  /*  /*
2     rdesktop: A Remote Desktop Protocol client.     rdesktop: A Remote Desktop Protocol client.
3     RDP licensing negotiation     RDP licensing negotiation
4     Copyright (C) Matthew Chapman 1999-2001     Copyright (C) Matthew Chapman 1999-2002
5        
6     This program is free software; you can redistribute it and/or modify     This program is free software; you can redistribute it and/or modify
7     it under the terms of the GNU General Public License as published by     it under the terms of the GNU General Public License as published by
# Line 19  Line 19 
19  */  */
20    
21  #include "rdesktop.h"  #include "rdesktop.h"
22    
23    #ifdef WITH_OPENSSL
24    #include <openssl/rc4.h>
25    #else
26  #include "crypto/rc4.h"  #include "crypto/rc4.h"
27    #endif
28    
29  extern char username[16];  extern char username[16];
30  extern char hostname[16];  extern char hostname[16];
 extern BOOL licence;  
31    
32  static uint8 licence_key[16];  static uint8 licence_key[16];
33  static uint8 licence_sign_key[16];  static uint8 licence_sign_key[16];
# Line 68  licence_present(uint8 * client_random, u Line 72  licence_present(uint8 * client_random, u
72    
73          s = sec_init(sec_flags, length + 4);          s = sec_init(sec_flags, length + 4);
74    
75          out_uint16_le(s, LICENCE_TAG_PRESENT);          out_uint8(s, LICENCE_TAG_PRESENT);
76            out_uint8(s, 2); /* version */
77          out_uint16_le(s, length);          out_uint16_le(s, length);
78    
79          out_uint32_le(s, 1);          out_uint32_le(s, 1);
# Line 107  licence_send_request(uint8 * client_rand Line 112  licence_send_request(uint8 * client_rand
112    
113          s = sec_init(sec_flags, length + 2);          s = sec_init(sec_flags, length + 2);
114    
115          out_uint16_le(s, LICENCE_TAG_REQUEST);          out_uint8(s, LICENCE_TAG_REQUEST);
116            out_uint8(s, 2); /* version */
117          out_uint16_le(s, length);          out_uint16_le(s, length);
118    
119          out_uint32_le(s, 1);          out_uint32_le(s, 1);
# Line 120  licence_send_request(uint8 * client_rand Line 126  licence_send_request(uint8 * client_rand
126          out_uint8p(s, rsa_data, SEC_MODULUS_SIZE);          out_uint8p(s, rsa_data, SEC_MODULUS_SIZE);
127          out_uint8s(s, SEC_PADDING_SIZE);          out_uint8s(s, SEC_PADDING_SIZE);
128    
129          out_uint16(s, LICENCE_TAG_USER);          out_uint16_le(s, LICENCE_TAG_USER);
130          out_uint16(s, userlen);          out_uint16_le(s, userlen);
131          out_uint8p(s, user, userlen);          out_uint8p(s, user, userlen);
132    
133          out_uint16(s, LICENCE_TAG_HOST);          out_uint16_le(s, LICENCE_TAG_HOST);
134          out_uint16(s, hostlen);          out_uint16_le(s, hostlen);
135          out_uint8p(s, host, hostlen);          out_uint8p(s, host, hostlen);
136    
137          s_mark_end(s);          s_mark_end(s);
# Line 137  static void Line 143  static void
143  licence_process_demand(STREAM s)  licence_process_demand(STREAM s)
144  {  {
145          uint8 null_data[SEC_MODULUS_SIZE];          uint8 null_data[SEC_MODULUS_SIZE];
         uint8 hwid[LICENCE_HWID_SIZE];  
         uint8 signature[LICENCE_SIGNATURE_SIZE];  
146          uint8 *server_random;          uint8 *server_random;
147            uint8 signature[LICENCE_SIGNATURE_SIZE];
148            uint8 hwid[LICENCE_HWID_SIZE];
149          uint8 *licence_data;          uint8 *licence_data;
150          int licence_size;          int licence_size;
151          RC4_KEY crypt_key;          RC4_KEY crypt_key;
# Line 153  licence_process_demand(STREAM s) Line 159  licence_process_demand(STREAM s)
159          licence_generate_keys(null_data, server_random, null_data);          licence_generate_keys(null_data, server_random, null_data);
160    
161          licence_size = load_licence(&licence_data);          licence_size = load_licence(&licence_data);
162          if (licence_size == -1)          if (licence_size != -1)
163          {          {
164                  licence_send_request(null_data, null_data, username, hostname);                  /* Generate a signature for the HWID buffer */
165                    licence_generate_hwid(hwid);
166                    sec_sign(signature, 16, licence_sign_key, 16, hwid, sizeof(hwid));
167    
168                    /* Now encrypt the HWID */
169                    RC4_set_key(&crypt_key, 16, licence_key);
170                    RC4(&crypt_key, sizeof(hwid), hwid, hwid);
171    
172                    licence_present(null_data, null_data, licence_data, licence_size, hwid, signature);
173                    xfree(licence_data);
174                  return;                  return;
175          }          }
176    
177          /* Generate a signature for the HWID buffer */          licence_send_request(null_data, null_data, username, hostname);
         licence_generate_hwid(hwid);  
         sec_sign(signature, 16, licence_sign_key, 16, hwid, sizeof(hwid));  
   
         /* Now encrypt the HWID */  
         RC4_set_key(&crypt_key, 16, licence_key);  
         RC4(&crypt_key, sizeof(hwid), hwid, hwid);  
   
         licence_present(null_data, null_data, licence_data, licence_size, hwid, signature);  
         xfree(licence_data);  
178  }  }
179    
180  /* Send an authentication response packet */  /* Send an authentication response packet */
# Line 181  licence_send_authresp(uint8 * token, uin Line 187  licence_send_authresp(uint8 * token, uin
187    
188          s = sec_init(sec_flags, length + 2);          s = sec_init(sec_flags, length + 2);
189    
190          out_uint16_le(s, LICENCE_TAG_AUTHRESP);          out_uint8(s, LICENCE_TAG_AUTHRESP);
191            out_uint8(s, 2); /* version */
192          out_uint16_le(s, length);          out_uint16_le(s, length);
193    
194          out_uint16_le(s, 1);          out_uint16_le(s, 1);
# Line 244  licence_process_authreq(STREAM s) Line 251  licence_process_authreq(STREAM s)
251          memcpy(sealed_buffer + LICENCE_TOKEN_SIZE, hwid, LICENCE_HWID_SIZE);          memcpy(sealed_buffer + LICENCE_TOKEN_SIZE, hwid, LICENCE_HWID_SIZE);
252          sec_sign(out_sig, 16, licence_sign_key, 16, sealed_buffer, sizeof(sealed_buffer));          sec_sign(out_sig, 16, licence_sign_key, 16, sealed_buffer, sizeof(sealed_buffer));
253    
         /* Deliberately break signature if licencing disabled */  
         if (!licence)  
                 memset(out_sig, 0, sizeof(out_sig));  
   
254          /* Now encrypt the HWID */          /* Now encrypt the HWID */
255          RC4_set_key(&crypt_key, 16, licence_key);          RC4_set_key(&crypt_key, 16, licence_key);
256          RC4(&crypt_key, LICENCE_HWID_SIZE, hwid, crypt_hwid);          RC4(&crypt_key, LICENCE_HWID_SIZE, hwid, crypt_hwid);
# Line 283  licence_process_issue(STREAM s) Line 286  licence_process_issue(STREAM s)
286  void  void
287  licence_process(STREAM s)  licence_process(STREAM s)
288  {  {
289          uint16 tag;          uint8 tag;
290    
291          in_uint16_le(s, tag);          in_uint8(s, tag);
292          in_uint8s(s, 2);        /* length */          in_uint8s(s, 3);        /* version, length */
293    
294          switch (tag)          switch (tag)
295          {          {
# Line 303  licence_process(STREAM s) Line 306  licence_process(STREAM s)
306                          break;                          break;
307    
308                  case LICENCE_TAG_REISSUE:                  case LICENCE_TAG_REISSUE:
                         break;  
   
309                  case LICENCE_TAG_RESULT:                  case LICENCE_TAG_RESULT:
310                          break;                          break;
311    
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