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]; |
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 |
/* Present an existing licence to the server */ |
/* Present an existing licence to the server */ |
59 |
static void |
static void |
60 |
licence_present(uint8 *client_random, uint8 *rsa_data, |
licence_present(uint8 * client_random, uint8 * rsa_data, |
61 |
uint8 *licence_data, int licence_size, |
uint8 * licence_data, int licence_size, uint8 * hwid, uint8 * signature) |
|
uint8 *hwid, uint8 *signature) |
|
62 |
{ |
{ |
63 |
uint32 sec_flags = SEC_LICENCE_NEG; |
uint32 sec_flags = SEC_LICENCE_NEG; |
64 |
uint16 length = 16 + SEC_RANDOM_SIZE + SEC_MODULUS_SIZE + SEC_PADDING_SIZE |
uint16 length = |
65 |
+ licence_size + LICENCE_HWID_SIZE + LICENCE_SIGNATURE_SIZE; |
16 + SEC_RANDOM_SIZE + SEC_MODULUS_SIZE + SEC_PADDING_SIZE + |
66 |
|
licence_size + LICENCE_HWID_SIZE + LICENCE_SIGNATURE_SIZE; |
67 |
STREAM s; |
STREAM s; |
68 |
|
|
69 |
s = sec_init(sec_flags, length + 4); |
s = sec_init(sec_flags, length + 4); |
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, char *user, char *host) |
|
char *user, char *host) |
|
101 |
{ |
{ |
102 |
uint32 sec_flags = SEC_LICENCE_NEG; |
uint32 sec_flags = SEC_LICENCE_NEG; |
103 |
uint16 userlen = strlen(user) + 1; |
uint16 userlen = strlen(user) + 1; |
161 |
|
|
162 |
/* Generate a signature for the HWID buffer */ |
/* Generate a signature for the HWID buffer */ |
163 |
licence_generate_hwid(hwid); |
licence_generate_hwid(hwid); |
164 |
sec_sign(signature, licence_sign_key, 16, hwid, sizeof(hwid)); |
sec_sign(signature, 16, licence_sign_key, 16, hwid, sizeof(hwid)); |
165 |
|
|
166 |
/* Now encrypt the HWID */ |
/* Now encrypt the HWID */ |
167 |
RC4_set_key(&crypt_key, 16, licence_key); |
RC4_set_key(&crypt_key, 16, licence_key); |
168 |
RC4(&crypt_key, sizeof(hwid), hwid, hwid); |
RC4(&crypt_key, sizeof(hwid), hwid, hwid); |
169 |
|
|
170 |
licence_present(null_data, null_data, licence_data, licence_size, |
licence_present(null_data, null_data, licence_data, licence_size, hwid, signature); |
|
hwid, signature); |
|
171 |
xfree(licence_data); |
xfree(licence_data); |
172 |
} |
} |
173 |
|
|
174 |
/* Send an authentication response packet */ |
/* Send an authentication response packet */ |
175 |
static void |
static void |
176 |
licence_send_authresp(uint8 *token, uint8 *crypt_hwid, uint8 *signature) |
licence_send_authresp(uint8 * token, uint8 * crypt_hwid, uint8 * signature) |
177 |
{ |
{ |
178 |
uint32 sec_flags = SEC_LICENCE_NEG; |
uint32 sec_flags = SEC_LICENCE_NEG; |
179 |
uint16 length = 58; |
uint16 length = 58; |
200 |
|
|
201 |
/* Parse an authentication request packet */ |
/* Parse an authentication request packet */ |
202 |
static BOOL |
static BOOL |
203 |
licence_parse_authreq(STREAM s, uint8 **token, uint8 **signature) |
licence_parse_authreq(STREAM s, uint8 ** token, uint8 ** signature) |
204 |
{ |
{ |
205 |
uint16 tokenlen; |
uint16 tokenlen; |
206 |
|
|
224 |
licence_process_authreq(STREAM s) |
licence_process_authreq(STREAM s) |
225 |
{ |
{ |
226 |
uint8 *in_token, *in_sig; |
uint8 *in_token, *in_sig; |
227 |
uint8 out_token[LICENCE_TOKEN_SIZE], |
uint8 out_token[LICENCE_TOKEN_SIZE], decrypt_token[LICENCE_TOKEN_SIZE]; |
|
decrypt_token[LICENCE_TOKEN_SIZE]; |
|
228 |
uint8 hwid[LICENCE_HWID_SIZE], crypt_hwid[LICENCE_HWID_SIZE]; |
uint8 hwid[LICENCE_HWID_SIZE], crypt_hwid[LICENCE_HWID_SIZE]; |
229 |
uint8 sealed_buffer[LICENCE_TOKEN_SIZE + LICENCE_HWID_SIZE]; |
uint8 sealed_buffer[LICENCE_TOKEN_SIZE + LICENCE_HWID_SIZE]; |
230 |
uint8 out_sig[LICENCE_SIGNATURE_SIZE]; |
uint8 out_sig[LICENCE_SIGNATURE_SIZE]; |
242 |
licence_generate_hwid(hwid); |
licence_generate_hwid(hwid); |
243 |
memcpy(sealed_buffer, decrypt_token, LICENCE_TOKEN_SIZE); |
memcpy(sealed_buffer, decrypt_token, LICENCE_TOKEN_SIZE); |
244 |
memcpy(sealed_buffer + LICENCE_TOKEN_SIZE, hwid, LICENCE_HWID_SIZE); |
memcpy(sealed_buffer + LICENCE_TOKEN_SIZE, hwid, LICENCE_HWID_SIZE); |
245 |
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)); |
|
246 |
|
|
247 |
/* Deliberately break signature if licencing disabled */ |
/* Deliberately break signature if licencing disabled */ |
248 |
if (!licence) |
if (!licence) |
276 |
return; |
return; |
277 |
|
|
278 |
licence_issued = True; |
licence_issued = True; |
279 |
save_licence(s->p, length-2); |
save_licence(s->p, length - 2); |
280 |
} |
} |
281 |
|
|
282 |
/* Process a licence packet */ |
/* Process a licence packet */ |