/[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 293 by astrand, Tue Jan 21 20:22:44 2003 UTC revision 380 by jsorg71, Fri May 30 21:44:06 2003 UTC
# Line 29  Line 29 
29  extern char username[16];  extern char username[16];
30  extern char hostname[16];  extern char hostname[16];
31    
32  static uint8 licence_key[16];  static uint8 g_licence_key[16];
33  static uint8 licence_sign_key[16];  static uint8 g_licence_sign_key[16];
34    
35  BOOL licence_issued = False;  BOOL g_licence_issued = False;
36    
37  /* Generate a session key and RC4 keys, given client and server randoms */  /* Generate a session key and RC4 keys, given client and server randoms */
38  static void  static void
# Line 46  licence_generate_keys(uint8 * client_key Line 46  licence_generate_keys(uint8 * client_key
46          sec_hash_48(session_key, temp_hash, server_key, client_key, 65);          sec_hash_48(session_key, temp_hash, server_key, client_key, 65);
47    
48          /* Store first 16 bytes of session key, for generating signatures */          /* Store first 16 bytes of session key, for generating signatures */
49          memcpy(licence_sign_key, session_key, 16);          memcpy(g_licence_sign_key, session_key, 16);
50    
51          /* Generate RC4 key */          /* Generate RC4 key */
52          sec_hash_16(licence_key, &session_key[16], client_key, server_key);          sec_hash_16(g_licence_key, &session_key[16], client_key, server_key);
53  }  }
54    
55  static void  static void
# Line 59  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 73  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 99  licence_present(uint8 * client_random, u Line 99  licence_present(uint8 * client_random, u
99          s_mark_end(s);          s_mark_end(s);
100          sec_send(s, sec_flags);          sec_send(s, sec_flags);
101  }  }
 #endif  
102    
103  /* Send a licence request packet */  /* Send a licence request packet */
104  static void  static void
# Line 113  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 126  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 144  licence_process_demand(STREAM s) Line 144  licence_process_demand(STREAM s)
144  {  {
145          uint8 null_data[SEC_MODULUS_SIZE];          uint8 null_data[SEC_MODULUS_SIZE];
146          uint8 *server_random;          uint8 *server_random;
 #ifdef SAVE_LICENCE  
147          uint8 signature[LICENCE_SIGNATURE_SIZE];          uint8 signature[LICENCE_SIGNATURE_SIZE];
148          uint8 hwid[LICENCE_HWID_SIZE];          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;
 #endif  
152    
153          /* Retrieve the server random from the incoming packet */          /* Retrieve the server random from the incoming packet */
154          in_uint8p(s, server_random, SEC_RANDOM_SIZE);          in_uint8p(s, server_random, SEC_RANDOM_SIZE);
# Line 160  licence_process_demand(STREAM s) Line 158  licence_process_demand(STREAM s)
158          memset(null_data, 0, sizeof(null_data));          memset(null_data, 0, sizeof(null_data));
159          licence_generate_keys(null_data, server_random, null_data);          licence_generate_keys(null_data, server_random, null_data);
160    
 #ifdef SAVE_LICENCE  
161          licence_size = load_licence(&licence_data);          licence_size = load_licence(&licence_data);
162          if (licence_size != -1)          if (licence_size > 0)
163          {          {
164                  /* Generate a signature for the HWID buffer */                  /* Generate a signature for the HWID buffer */
165                  licence_generate_hwid(hwid);                  licence_generate_hwid(hwid);
166                  sec_sign(signature, 16, licence_sign_key, 16, hwid, sizeof(hwid));                  sec_sign(signature, 16, g_licence_sign_key, 16, hwid, sizeof(hwid));
167    
168                  /* Now encrypt the HWID */                  /* Now encrypt the HWID */
169                  RC4_set_key(&crypt_key, 16, licence_key);                  RC4_set_key(&crypt_key, 16, g_licence_key);
170                  RC4(&crypt_key, sizeof(hwid), hwid, hwid);                  RC4(&crypt_key, sizeof(hwid), hwid, hwid);
171    
172                  licence_present(null_data, null_data, licence_data, licence_size, hwid, signature);                  licence_present(null_data, null_data, licence_data, licence_size, hwid, signature);
173                  xfree(licence_data);                  xfree(licence_data);
174                  return;                  return;
175          }          }
 #endif  
176    
177          licence_send_request(null_data, null_data, username, hostname);          licence_send_request(null_data, null_data, username, hostname);
178  }  }
# Line 191  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 245  licence_process_authreq(STREAM s) Line 242  licence_process_authreq(STREAM s)
242          memcpy(out_token, in_token, LICENCE_TOKEN_SIZE);          memcpy(out_token, in_token, LICENCE_TOKEN_SIZE);
243    
244          /* Decrypt the token. It should read TEST in Unicode. */          /* Decrypt the token. It should read TEST in Unicode. */
245          RC4_set_key(&crypt_key, 16, licence_key);          RC4_set_key(&crypt_key, 16, g_licence_key);
246          RC4(&crypt_key, LICENCE_TOKEN_SIZE, in_token, decrypt_token);          RC4(&crypt_key, LICENCE_TOKEN_SIZE, in_token, decrypt_token);
247    
248          /* Generate a signature for a buffer of token and HWID */          /* Generate a signature for a buffer of token and HWID */
249          licence_generate_hwid(hwid);          licence_generate_hwid(hwid);
250          memcpy(sealed_buffer, decrypt_token, LICENCE_TOKEN_SIZE);          memcpy(sealed_buffer, decrypt_token, LICENCE_TOKEN_SIZE);
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, g_licence_sign_key, 16, sealed_buffer, sizeof(sealed_buffer));
253    
254          /* Now encrypt the HWID */          /* Now encrypt the HWID */
255          RC4_set_key(&crypt_key, 16, licence_key);          RC4_set_key(&crypt_key, 16, g_licence_key);
256          RC4(&crypt_key, LICENCE_HWID_SIZE, hwid, crypt_hwid);          RC4(&crypt_key, LICENCE_HWID_SIZE, hwid, crypt_hwid);
257    
258          licence_send_authresp(out_token, crypt_hwid, out_sig);          licence_send_authresp(out_token, crypt_hwid, out_sig);
# Line 268  licence_process_issue(STREAM s) Line 265  licence_process_issue(STREAM s)
265          RC4_KEY crypt_key;          RC4_KEY crypt_key;
266          uint32 length;          uint32 length;
267          uint16 check;          uint16 check;
268            int i;
269    
270          in_uint8s(s, 2);        /* 3d 45 - unknown */          in_uint8s(s, 2);        /* 3d 45 - unknown */
271          in_uint16_le(s, length);          in_uint16_le(s, length);
272          if (!s_check_rem(s, length))          if (!s_check_rem(s, length))
273                  return;                  return;
274    
275          RC4_set_key(&crypt_key, 16, licence_key);          RC4_set_key(&crypt_key, 16, g_licence_key);
276          RC4(&crypt_key, length, s->p, s->p);          RC4(&crypt_key, length, s->p, s->p);
277    
278          in_uint16(s, check);          in_uint16(s, check);
279          if (check != 0)          if (check != 0)
280                  return;                  return;
281    
282          licence_issued = True;          g_licence_issued = True;
283    
284  #ifdef SAVE_LICENCE          in_uint8s(s, 2);        /* pad */
285          save_licence(s->p, length - 2);  
286  #endif          /* advance to fourth string */
287            length = 0;
288            for (i = 0; i < 4; i++)
289            {
290                    in_uint8s(s, length);
291                    in_uint32_le(s, length);
292                    if (!s_check_rem(s, length))
293                            return;
294            }
295    
296            g_licence_issued = True;
297            save_licence(s->p, length);
298  }  }
299    
300  /* Process a licence packet */  /* Process a licence packet */
301  void  void
302  licence_process(STREAM s)  licence_process(STREAM s)
303  {  {
304          uint16 tag;          uint8 tag;
305    
306          in_uint16_le(s, tag);          in_uint8(s, tag);
307          in_uint8s(s, 2);        /* length */          in_uint8s(s, 3);        /* version, length */
308    
309          switch (tag)          switch (tag)
310          {          {
# Line 312  licence_process(STREAM s) Line 321  licence_process(STREAM s)
321                          break;                          break;
322    
323                  case LICENCE_TAG_REISSUE:                  case LICENCE_TAG_REISSUE:
                         break;  
   
324                  case LICENCE_TAG_RESULT:                  case LICENCE_TAG_RESULT:
325                          break;                          break;
326    
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