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, |
licence_generate_keys(uint8 * client_key, uint8 * server_key, uint8 * client_rsa) |
|
uint8 * client_rsa) |
|
36 |
{ |
{ |
37 |
uint8 session_key[48]; |
uint8 session_key[48]; |
38 |
uint8 temp_hash[48]; |
uint8 temp_hash[48]; |
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 = |
uint16 length = |
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; |
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, |
/* Generate a signature for the HWID buffer */ |
162 |
hostname); |
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, 16, 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 */ |
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]; |
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, 16, 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) |
280 |
return; |
return; |
281 |
|
|
282 |
licence_issued = True; |
licence_issued = True; |
283 |
|
|
284 |
|
#ifdef SAVE_LICENCE |
285 |
save_licence(s->p, length - 2); |
save_licence(s->p, length - 2); |
286 |
|
#endif |
287 |
} |
} |
288 |
|
|
289 |
/* Process a licence packet */ |
/* Process a licence packet */ |