/[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 38 by matty, Fri Sep 14 13:51:38 2001 UTC revision 39 by matthewc, Fri Apr 5 07:57:43 2002 UTC
# Line 31  static uint8 licence_sign_key[16]; Line 31  static uint8 licence_sign_key[16];
31  BOOL licence_issued = False;  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  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];
# Line 48  licence_generate_keys(uint8 *client_key, Line 48  licence_generate_keys(uint8 *client_key,
48          sec_hash_16(licence_key, &session_key[16], client_key, server_key);          sec_hash_16(licence_key, &session_key[16], client_key, server_key);
49  }  }
50    
51    static void
52    licence_generate_hwid(uint8 *hwid)
53    {
54            buf_out_uint32(hwid, 2);
55            strncpy(hwid + 4, hostname, LICENCE_HWID_SIZE - 4);
56    }
57    
58    /* Present an existing licence to the server */
59    static void
60    licence_present(uint8 *client_random, uint8 *rsa_data,
61                    uint8 *licence_data, int licence_size,
62                    uint8 *hwid, uint8 *signature)
63    {
64            uint32 sec_flags = SEC_LICENCE_NEG;
65            uint16 length = 16 + SEC_RANDOM_SIZE + SEC_MODULUS_SIZE + SEC_PADDING_SIZE
66                            + licence_size + LICENCE_HWID_SIZE + LICENCE_SIGNATURE_SIZE;
67            STREAM s;
68    
69            s = sec_init(sec_flags, length + 4);
70    
71            out_uint16_le(s, LICENCE_TAG_PRESENT);
72            out_uint16_le(s, length);
73    
74            out_uint32_le(s, 1);
75            out_uint16(s, 0);
76            out_uint16_le(s, 0x0201);
77    
78            out_uint8p(s, client_random, SEC_RANDOM_SIZE);
79            out_uint16(s, 0);
80            out_uint16_le(s, (SEC_MODULUS_SIZE + SEC_PADDING_SIZE));
81            out_uint8p(s, rsa_data, SEC_MODULUS_SIZE);
82            out_uint8s(s, SEC_PADDING_SIZE);
83    
84            out_uint16_le(s, 1);
85            out_uint16_le(s, licence_size);
86            out_uint8p(s, licence_data, licence_size);
87    
88            out_uint16_le(s, 1);
89            out_uint16_le(s, LICENCE_HWID_SIZE);
90            out_uint8p(s, hwid, LICENCE_HWID_SIZE);
91    
92            out_uint8p(s, signature, LICENCE_SIGNATURE_SIZE);
93    
94            s_mark_end(s);
95            sec_send(s, sec_flags);
96    }
97    
98  /* Send a licence request packet */  /* Send a licence request packet */
99  static void  static void
100  licence_send_request(uint8 *client_random, uint8 *rsa_data,  licence_send_request(uint8 *client_random, uint8 *rsa_data,
# Line 65  licence_send_request(uint8 *client_rando Line 112  licence_send_request(uint8 *client_rando
112          out_uint16_le(s, length);          out_uint16_le(s, length);
113    
114          out_uint32_le(s, 1);          out_uint32_le(s, 1);
115          out_uint32_le(s, 0xff010000);          out_uint16(s, 0);
116            out_uint16_le(s, 0xff01);
117    
118          out_uint8p(s, client_random, SEC_RANDOM_SIZE);          out_uint8p(s, client_random, SEC_RANDOM_SIZE);
119          out_uint16(s, 0);          out_uint16(s, 0);
# Line 90  static void Line 138  static void
138  licence_process_demand(STREAM s)  licence_process_demand(STREAM s)
139  {  {
140          uint8 null_data[SEC_MODULUS_SIZE];          uint8 null_data[SEC_MODULUS_SIZE];
141            uint8 hwid[LICENCE_HWID_SIZE];
142            uint8 signature[LICENCE_SIGNATURE_SIZE];
143          uint8 *server_random;          uint8 *server_random;
144            uint8 *licence_data;
145            int licence_size;
146            RC4_KEY crypt_key;
147    
148          /* Retrieve the server random from the incoming packet */          /* Retrieve the server random from the incoming packet */
149          in_uint8p(s, server_random, SEC_RANDOM_SIZE);          in_uint8p(s, server_random, SEC_RANDOM_SIZE);
# Line 100  licence_process_demand(STREAM s) Line 153  licence_process_demand(STREAM s)
153          memset(null_data, 0, sizeof(null_data));          memset(null_data, 0, sizeof(null_data));
154          licence_generate_keys(null_data, server_random, null_data);          licence_generate_keys(null_data, server_random, null_data);
155    
156          /* Send a certificate request back to the server */          licence_size = load_licence(&licence_data);
157          licence_send_request(null_data, null_data, username, hostname);          if (licence_size == -1)
158            {
159                    licence_send_request(null_data, null_data, username, hostname);
160                    return;
161            }
162    
163            /* Generate a signature for the HWID buffer */
164            licence_generate_hwid(hwid);
165            sec_sign(signature, licence_sign_key, 16, hwid, sizeof(hwid));
166    
167            /* Now encrypt the HWID */
168            RC4_set_key(&crypt_key, 16, licence_key);
169            RC4(&crypt_key, sizeof(hwid), hwid, hwid);
170    
171            licence_present(null_data, null_data, licence_data, licence_size,
172                                            hwid, signature);
173            xfree(licence_data);
174  }  }
175    
176  /* Send an authentication response packet */  /* Send an authentication response packet */
# Line 172  licence_process_authreq(STREAM s) Line 241  licence_process_authreq(STREAM s)
241          RC4_set_key(&crypt_key, 16, licence_key);          RC4_set_key(&crypt_key, 16, licence_key);
242          RC4(&crypt_key, LICENCE_TOKEN_SIZE, in_token, decrypt_token);          RC4(&crypt_key, LICENCE_TOKEN_SIZE, in_token, decrypt_token);
243    
         /* Construct HWID */  
         buf_out_uint32(hwid, 2);  
         strncpy(hwid + 4, hostname, LICENCE_HWID_SIZE - 4);  
   
244          /* Generate a signature for a buffer of token and HWID */          /* Generate a signature for a buffer of token and HWID */
245            licence_generate_hwid(hwid);
246          memcpy(sealed_buffer, decrypt_token, LICENCE_TOKEN_SIZE);          memcpy(sealed_buffer, decrypt_token, LICENCE_TOKEN_SIZE);
247          memcpy(sealed_buffer + LICENCE_TOKEN_SIZE, hwid, LICENCE_HWID_SIZE);          memcpy(sealed_buffer + LICENCE_TOKEN_SIZE, hwid, LICENCE_HWID_SIZE);
248          sec_sign(out_sig, licence_sign_key, 16,          sec_sign(out_sig, licence_sign_key, 16,
# Line 214  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);
         /* We should save the licence here */  
284  }  }
285    
286  /* Process a licence packet */  /* Process a licence packet */
# Line 241  licence_process(STREAM s) Line 306  licence_process(STREAM s)
306                          licence_process_issue(s);                          licence_process_issue(s);
307                          break;                          break;
308    
309                    case LICENCE_TAG_REISSUE:
310                            break;
311    
312                  case LICENCE_TAG_RESULT:                  case LICENCE_TAG_RESULT:
313                          break;                          break;
314    
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