/[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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revision 159 by matthewc, Sun Sep 15 12:36:55 2002 UTC revision 364 by matthewc, Wed Apr 16 08:08:40 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 55  licence_generate_hwid(uint8 * hwid) Line 59  licence_generate_hwid(uint8 * hwid)
59          strncpy((char *) (hwid + 4), hostname, LICENCE_HWID_SIZE - 4);          strncpy((char *) (hwid + 4), hostname, LICENCE_HWID_SIZE - 4);
60  }  }
61    
 #ifdef SAVE_LICENCE  
62  /* Present an existing licence to the server */  /* Present an existing licence to the server */
63  static void  static void
64  licence_present(uint8 * client_random, uint8 * rsa_data,  licence_present(uint8 * client_random, uint8 * rsa_data,
# Line 95  licence_present(uint8 * client_random, u Line 98  licence_present(uint8 * client_random, u
98          s_mark_end(s);          s_mark_end(s);
99          sec_send(s, sec_flags);          sec_send(s, sec_flags);
100  }  }
 #endif  
101    
102  /* Send a licence request packet */  /* Send a licence request packet */
103  static void  static void
# Line 139  static void Line 141  static void
141  licence_process_demand(STREAM s)  licence_process_demand(STREAM s)
142  {  {
143          uint8 null_data[SEC_MODULUS_SIZE];          uint8 null_data[SEC_MODULUS_SIZE];
         uint8 hwid[LICENCE_HWID_SIZE];  
         uint8 signature[LICENCE_SIGNATURE_SIZE];  
144          uint8 *server_random;          uint8 *server_random;
145            uint8 signature[LICENCE_SIGNATURE_SIZE];
146            uint8 hwid[LICENCE_HWID_SIZE];
147          uint8 *licence_data;          uint8 *licence_data;
148          int licence_size;          int licence_size;
149          RC4_KEY crypt_key;          RC4_KEY crypt_key;
# Line 154  licence_process_demand(STREAM s) Line 156  licence_process_demand(STREAM s)
156          memset(null_data, 0, sizeof(null_data));          memset(null_data, 0, sizeof(null_data));
157          licence_generate_keys(null_data, server_random, null_data);          licence_generate_keys(null_data, server_random, null_data);
158    
 #ifdef SAVE_LICENCE  
159          licence_size = load_licence(&licence_data);          licence_size = load_licence(&licence_data);
160          if (licence_size != -1)          if (licence_size != -1)
161          {          {
# Line 170  licence_process_demand(STREAM s) Line 171  licence_process_demand(STREAM s)
171                  xfree(licence_data);                  xfree(licence_data);
172                  return;                  return;
173          }          }
 #endif  
174    
175          licence_send_request(null_data, null_data, username, hostname);          licence_send_request(null_data, null_data, username, hostname);
176  }  }
# Line 248  licence_process_authreq(STREAM s) Line 248  licence_process_authreq(STREAM s)
248          memcpy(sealed_buffer + LICENCE_TOKEN_SIZE, hwid, LICENCE_HWID_SIZE);          memcpy(sealed_buffer + LICENCE_TOKEN_SIZE, hwid, LICENCE_HWID_SIZE);
249          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));
250    
         /* Deliberately break signature if licencing disabled */  
         if (!licence)  
                 memset(out_sig, 0, sizeof(out_sig));  
   
251          /* Now encrypt the HWID */          /* Now encrypt the HWID */
252          RC4_set_key(&crypt_key, 16, licence_key);          RC4_set_key(&crypt_key, 16, licence_key);
253          RC4(&crypt_key, LICENCE_HWID_SIZE, hwid, crypt_hwid);          RC4(&crypt_key, LICENCE_HWID_SIZE, hwid, crypt_hwid);
# Line 280  licence_process_issue(STREAM s) Line 276  licence_process_issue(STREAM s)
276                  return;                  return;
277    
278          licence_issued = True;          licence_issued = True;
   
 #ifdef SAVE_LICENCE  
279          save_licence(s->p, length - 2);          save_licence(s->p, length - 2);
 #endif  
280  }  }
281    
282  /* Process a licence packet */  /* Process a licence packet */
283  void  void
284  licence_process(STREAM s)  licence_process(STREAM s)
285  {  {
286          uint16 tag;          uint8 tag;
287    
288          in_uint16_le(s, tag);          in_uint8(s, tag);
289          in_uint8s(s, 2);        /* length */          in_uint8s(s, 3);        /* version, length */
290    
291          switch (tag)          switch (tag)
292          {          {
# Line 310  licence_process(STREAM s) Line 303  licence_process(STREAM s)
303                          break;                          break;
304    
305                  case LICENCE_TAG_REISSUE:                  case LICENCE_TAG_REISSUE:
                         break;  
   
306                  case LICENCE_TAG_RESULT:                  case LICENCE_TAG_RESULT:
307                          break;                          break;
308    
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