/[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 60 by jsorg71, Sun Jul 14 04:29:21 2002 UTC revision 159 by matthewc, Sun Sep 15 12:36:55 2002 UTC
# 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;
# 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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