/[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 39 by matthewc, Fri Apr 5 07:57:43 2002 UTC revision 159 by matthewc, Sun Sep 15 12:36:55 2002 UTC
# Line 7  Line 7 
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
8     the Free Software Foundation; either version 2 of the License, or     the Free Software Foundation; either version 2 of the License, or
9     (at your option) any later version.     (at your option) any later version.
10      
11     This program is distributed in the hope that it will be useful,     This program is distributed in the hope that it will be useful,
12     but WITHOUT ANY WARRANTY; without even the implied warranty of     but WITHOUT ANY WARRANTY; without even the implied warranty of
13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# Line 32  BOOL licence_issued = False; Line 32  BOOL licence_issued = False;
32    
33  /* Generate a session key and RC4 keys, given client and server randoms */  /* Generate a session key and RC4 keys, given client and server randoms */
34  static void  static void
35  licence_generate_keys(uint8 *client_key, uint8 *server_key, uint8 *client_rsa)  licence_generate_keys(uint8 * client_key, uint8 * server_key, uint8 * client_rsa)
36  {  {
37          uint8 session_key[48];          uint8 session_key[48];
38          uint8 temp_hash[48];          uint8 temp_hash[48];
# Line 49  licence_generate_keys(uint8 *client_key, Line 49  licence_generate_keys(uint8 *client_key,
49  }  }
50    
51  static void  static void
52  licence_generate_hwid(uint8 *hwid)  licence_generate_hwid(uint8 * hwid)
53  {  {
54          buf_out_uint32(hwid, 2);          buf_out_uint32(hwid, 2);
55          strncpy(hwid + 4, hostname, LICENCE_HWID_SIZE - 4);          strncpy((char *) (hwid + 4), hostname, LICENCE_HWID_SIZE - 4);
56  }  }
57    
58    #ifdef SAVE_LICENCE
59  /* Present an existing licence to the server */  /* Present an existing licence to the server */
60  static void  static void
61  licence_present(uint8 *client_random, uint8 *rsa_data,  licence_present(uint8 * client_random, uint8 * rsa_data,
62                  uint8 *licence_data, int licence_size,                  uint8 * licence_data, int licence_size, uint8 * hwid, uint8 * signature)
                 uint8 *hwid, uint8 *signature)  
63  {  {
64          uint32 sec_flags = SEC_LICENCE_NEG;          uint32 sec_flags = SEC_LICENCE_NEG;
65          uint16 length = 16 + SEC_RANDOM_SIZE + SEC_MODULUS_SIZE + SEC_PADDING_SIZE          uint16 length =
66                          + licence_size + LICENCE_HWID_SIZE + LICENCE_SIGNATURE_SIZE;                  16 + SEC_RANDOM_SIZE + SEC_MODULUS_SIZE + SEC_PADDING_SIZE +
67                    licence_size + LICENCE_HWID_SIZE + LICENCE_SIGNATURE_SIZE;
68          STREAM s;          STREAM s;
69    
70          s = sec_init(sec_flags, length + 4);          s = sec_init(sec_flags, length + 4);
# Line 94  licence_present(uint8 *client_random, ui Line 95  licence_present(uint8 *client_random, ui
95          s_mark_end(s);          s_mark_end(s);
96          sec_send(s, sec_flags);          sec_send(s, sec_flags);
97  }  }
98    #endif
99    
100  /* Send a licence request packet */  /* Send a licence request packet */
101  static void  static void
102  licence_send_request(uint8 *client_random, uint8 *rsa_data,  licence_send_request(uint8 * client_random, uint8 * rsa_data, char *user, char *host)
                      char *user, char *host)  
103  {  {
104          uint32 sec_flags = SEC_LICENCE_NEG;          uint32 sec_flags = SEC_LICENCE_NEG;
105          uint16 userlen = strlen(user) + 1;          uint16 userlen = strlen(user) + 1;
106          uint16 hostlen = strlen(host) + 1;          uint16 hostlen = strlen(host) + 1;
107          uint16 length = 120 + userlen + hostlen;          uint16 length = 128 + userlen + hostlen;
108          STREAM s;          STREAM s;
109    
110          s = sec_init(sec_flags, length + 2);          s = sec_init(sec_flags, length + 2);
# Line 153  licence_process_demand(STREAM s) Line 154  licence_process_demand(STREAM s)
154          memset(null_data, 0, sizeof(null_data));          memset(null_data, 0, sizeof(null_data));
155          licence_generate_keys(null_data, server_random, null_data);          licence_generate_keys(null_data, server_random, null_data);
156    
157    #ifdef SAVE_LICENCE
158          licence_size = load_licence(&licence_data);          licence_size = load_licence(&licence_data);
159          if (licence_size == -1)          if (licence_size != -1)
160          {          {
161                  licence_send_request(null_data, null_data, username, hostname);                  /* Generate a signature for the HWID buffer */
162                    licence_generate_hwid(hwid);
163                    sec_sign(signature, 16, licence_sign_key, 16, hwid, sizeof(hwid));
164    
165                    /* Now encrypt the HWID */
166                    RC4_set_key(&crypt_key, 16, licence_key);
167                    RC4(&crypt_key, sizeof(hwid), hwid, hwid);
168    
169                    licence_present(null_data, null_data, licence_data, licence_size, hwid, signature);
170                    xfree(licence_data);
171                  return;                  return;
172          }          }
173    #endif
174    
175          /* Generate a signature for the HWID buffer */          licence_send_request(null_data, null_data, username, hostname);
         licence_generate_hwid(hwid);  
         sec_sign(signature, 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);  
176  }  }
177    
178  /* Send an authentication response packet */  /* Send an authentication response packet */
179  static void  static void
180  licence_send_authresp(uint8 *token, uint8 *crypt_hwid, uint8 *signature)  licence_send_authresp(uint8 * token, uint8 * crypt_hwid, uint8 * signature)
181  {  {
182          uint32 sec_flags = SEC_LICENCE_NEG;          uint32 sec_flags = SEC_LICENCE_NEG;
183          uint16 length = 58;          uint16 length = 58;
# Line 202  licence_send_authresp(uint8 *token, uint Line 204  licence_send_authresp(uint8 *token, uint
204    
205  /* Parse an authentication request packet */  /* Parse an authentication request packet */
206  static BOOL  static BOOL
207  licence_parse_authreq(STREAM s, uint8 **token, uint8 **signature)  licence_parse_authreq(STREAM s, uint8 ** token, uint8 ** signature)
208  {  {
209          uint16 tokenlen;          uint16 tokenlen;
210    
# Line 226  static void Line 228  static void
228  licence_process_authreq(STREAM s)  licence_process_authreq(STREAM s)
229  {  {
230          uint8 *in_token, *in_sig;          uint8 *in_token, *in_sig;
231          uint8 out_token[LICENCE_TOKEN_SIZE],          uint8 out_token[LICENCE_TOKEN_SIZE], decrypt_token[LICENCE_TOKEN_SIZE];
                 decrypt_token[LICENCE_TOKEN_SIZE];  
232          uint8 hwid[LICENCE_HWID_SIZE], crypt_hwid[LICENCE_HWID_SIZE];          uint8 hwid[LICENCE_HWID_SIZE], crypt_hwid[LICENCE_HWID_SIZE];
233          uint8 sealed_buffer[LICENCE_TOKEN_SIZE + LICENCE_HWID_SIZE];          uint8 sealed_buffer[LICENCE_TOKEN_SIZE + LICENCE_HWID_SIZE];
234          uint8 out_sig[LICENCE_SIGNATURE_SIZE];          uint8 out_sig[LICENCE_SIGNATURE_SIZE];
# Line 245  licence_process_authreq(STREAM s) Line 246  licence_process_authreq(STREAM s)
246          licence_generate_hwid(hwid);          licence_generate_hwid(hwid);
247          memcpy(sealed_buffer, decrypt_token, LICENCE_TOKEN_SIZE);          memcpy(sealed_buffer, decrypt_token, LICENCE_TOKEN_SIZE);
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, licence_sign_key, 16,          sec_sign(out_sig, 16, licence_sign_key, 16, sealed_buffer, sizeof(sealed_buffer));
                  sealed_buffer, sizeof(sealed_buffer));  
250    
251          /* Deliberately break signature if licencing disabled */          /* Deliberately break signature if licencing disabled */
252          if (!licence)          if (!licence)
# Line 280  licence_process_issue(STREAM s) Line 280  licence_process_issue(STREAM s)
280                  return;                  return;
281    
282          licence_issued = True;          licence_issued = True;
283          save_licence(s->p, length-2);  
284    #ifdef SAVE_LICENCE
285            save_licence(s->p, length - 2);
286    #endif
287  }  }
288    
289  /* Process a licence packet */  /* Process a licence packet */
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