/[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 60 by jsorg71, Sun Jul 14 04:29:21 2002 UTC revision 73 by astrand, Mon Jul 29 19:21:51 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,
36                          uint8 * client_rsa)
37  {  {
38          uint8 session_key[48];          uint8 session_key[48];
39          uint8 temp_hash[48];          uint8 temp_hash[48];
# Line 49  licence_generate_keys(uint8 *client_key, Line 50  licence_generate_keys(uint8 *client_key,
50  }  }
51    
52  static void  static void
53  licence_generate_hwid(uint8 *hwid)  licence_generate_hwid(uint8 * hwid)
54  {  {
55          buf_out_uint32(hwid, 2);          buf_out_uint32(hwid, 2);
56          strncpy(hwid + 4, hostname, LICENCE_HWID_SIZE - 4);          strncpy((char *)(hwid + 4), hostname, LICENCE_HWID_SIZE - 4);
57  }  }
58    
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,
63                  uint8 *hwid, uint8 *signature)                  uint8 * hwid, uint8 * signature)
64  {  {
65          uint32 sec_flags = SEC_LICENCE_NEG;          uint32 sec_flags = SEC_LICENCE_NEG;
66          uint16 length = 16 + SEC_RANDOM_SIZE + SEC_MODULUS_SIZE + SEC_PADDING_SIZE          uint16 length =
67                          + licence_size + LICENCE_HWID_SIZE + LICENCE_SIGNATURE_SIZE;                  16 + SEC_RANDOM_SIZE + SEC_MODULUS_SIZE + SEC_PADDING_SIZE +
68                    licence_size + LICENCE_HWID_SIZE + LICENCE_SIGNATURE_SIZE;
69          STREAM s;          STREAM s;
70    
71          s = sec_init(sec_flags, length + 4);          s = sec_init(sec_flags, length + 4);
# Line 97  licence_present(uint8 *client_random, ui Line 99  licence_present(uint8 *client_random, ui
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,
103                       char *user, char *host)                       char *user, char *host)
104  {  {
105          uint32 sec_flags = SEC_LICENCE_NEG;          uint32 sec_flags = SEC_LICENCE_NEG;
# Line 156  licence_process_demand(STREAM s) Line 158  licence_process_demand(STREAM s)
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);                  licence_send_request(null_data, null_data, username,
162                                         hostname);
163                  return;                  return;
164          }          }
165    
166          /* Generate a signature for the HWID buffer */          /* Generate a signature for the HWID buffer */
167          licence_generate_hwid(hwid);          licence_generate_hwid(hwid);
168          sec_sign(signature, licence_sign_key, 16, hwid, sizeof(hwid));          sec_sign(signature, 16, licence_sign_key, 16, hwid, sizeof(hwid));
169    
170          /* Now encrypt the HWID */          /* Now encrypt the HWID */
171          RC4_set_key(&crypt_key, 16, licence_key);          RC4_set_key(&crypt_key, 16, licence_key);
172          RC4(&crypt_key, sizeof(hwid), hwid, hwid);          RC4(&crypt_key, sizeof(hwid), hwid, hwid);
173    
174          licence_present(null_data, null_data, licence_data, licence_size,          licence_present(null_data, null_data, licence_data, licence_size,
175                                          hwid, signature);                          hwid, signature);
176          xfree(licence_data);          xfree(licence_data);
177  }  }
178    
179  /* Send an authentication response packet */  /* Send an authentication response packet */
180  static void  static void
181  licence_send_authresp(uint8 *token, uint8 *crypt_hwid, uint8 *signature)  licence_send_authresp(uint8 * token, uint8 * crypt_hwid, uint8 * signature)
182  {  {
183          uint32 sec_flags = SEC_LICENCE_NEG;          uint32 sec_flags = SEC_LICENCE_NEG;
184          uint16 length = 58;          uint16 length = 58;
# Line 202  licence_send_authresp(uint8 *token, uint Line 205  licence_send_authresp(uint8 *token, uint
205    
206  /* Parse an authentication request packet */  /* Parse an authentication request packet */
207  static BOOL  static BOOL
208  licence_parse_authreq(STREAM s, uint8 **token, uint8 **signature)  licence_parse_authreq(STREAM s, uint8 ** token, uint8 ** signature)
209  {  {
210          uint16 tokenlen;          uint16 tokenlen;
211    
# Line 245  licence_process_authreq(STREAM s) Line 248  licence_process_authreq(STREAM s)
248          licence_generate_hwid(hwid);          licence_generate_hwid(hwid);
249          memcpy(sealed_buffer, decrypt_token, LICENCE_TOKEN_SIZE);          memcpy(sealed_buffer, decrypt_token, LICENCE_TOKEN_SIZE);
250          memcpy(sealed_buffer + LICENCE_TOKEN_SIZE, hwid, LICENCE_HWID_SIZE);          memcpy(sealed_buffer + LICENCE_TOKEN_SIZE, hwid, LICENCE_HWID_SIZE);
251          sec_sign(out_sig, licence_sign_key, 16,          sec_sign(out_sig, 16, licence_sign_key, 16,
252                   sealed_buffer, sizeof(sealed_buffer));                   sealed_buffer, sizeof(sealed_buffer));
253    
254          /* Deliberately break signature if licencing disabled */          /* Deliberately break signature if licencing disabled */
# Line 280  licence_process_issue(STREAM s) Line 283  licence_process_issue(STREAM s)
283                  return;                  return;
284    
285          licence_issued = True;          licence_issued = True;
286          save_licence(s->p, length-2);          save_licence(s->p, length - 2);
287  }  }
288    
289  /* Process a licence packet */  /* Process a licence packet */
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