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]; |
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, |
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); |
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); |
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 */ |
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, |
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 */ |
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 |
|
|