26 |
#include "crypto/rc4.h" |
#include "crypto/rc4.h" |
27 |
#endif |
#endif |
28 |
|
|
29 |
extern char username[16]; |
extern char g_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 |
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 |
73 |
s = sec_init(sec_flags, length + 4); |
s = sec_init(sec_flags, length + 4); |
74 |
|
|
75 |
out_uint8(s, LICENCE_TAG_PRESENT); |
out_uint8(s, LICENCE_TAG_PRESENT); |
76 |
out_uint8(s, 2); /* version */ |
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); |
113 |
s = sec_init(sec_flags, length + 2); |
s = sec_init(sec_flags, length + 2); |
114 |
|
|
115 |
out_uint8(s, LICENCE_TAG_REQUEST); |
out_uint8(s, LICENCE_TAG_REQUEST); |
116 |
out_uint8(s, 2); /* version */ |
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); |
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); |
174 |
return; |
return; |
175 |
} |
} |
176 |
|
|
177 |
licence_send_request(null_data, null_data, username, hostname); |
licence_send_request(null_data, null_data, g_username, hostname); |
178 |
} |
} |
179 |
|
|
180 |
/* Send an authentication response packet */ |
/* Send an authentication response packet */ |
188 |
s = sec_init(sec_flags, length + 2); |
s = sec_init(sec_flags, length + 2); |
189 |
|
|
190 |
out_uint8(s, LICENCE_TAG_AUTHRESP); |
out_uint8(s, LICENCE_TAG_AUTHRESP); |
191 |
out_uint8(s, 2); /* version */ |
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); |
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); |
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 |
in_uint8s(s, 2); /* pad */ |
in_uint8s(s, 2); /* pad */ |
285 |
|
|
293 |
return; |
return; |
294 |
} |
} |
295 |
|
|
296 |
licence_issued = True; |
g_licence_issued = True; |
297 |
save_licence(s->p, length); |
save_licence(s->p, length); |
298 |
} |
} |
299 |
|
|