29 |
static uint8 licence_sign_key[16]; |
static uint8 licence_sign_key[16]; |
30 |
|
|
31 |
/* Generate a session key and RC4 keys, given client and server randoms */ |
/* Generate a session key and RC4 keys, given client and server randoms */ |
32 |
void licence_generate_keys(uint8 *client_key, uint8 *server_key, |
void |
33 |
uint8 *client_rsa) |
licence_generate_keys(uint8 *client_key, uint8 *server_key, uint8 *client_rsa) |
34 |
{ |
{ |
35 |
uint8 session_key[48]; |
uint8 session_key[48]; |
36 |
uint8 temp_hash[48]; |
uint8 temp_hash[48]; |
37 |
|
|
38 |
/* Generate session key - two rounds of sec_hash_48 */ |
/* Generate session key - two rounds of sec_hash_48 */ |
39 |
sec_hash_48(temp_hash, client_rsa, client_key, server_key, 65); |
sec_hash_48(temp_hash, client_rsa, client_key, server_key, 65); |
40 |
sec_hash_48(session_key, temp_hash, server_key, client_key, 65); |
sec_hash_48(session_key, temp_hash, server_key, client_key, 65); |
41 |
|
|
42 |
/* Store first 16 bytes of session key, for generating signatures */ |
/* Store first 16 bytes of session key, for generating signatures */ |
43 |
memcpy(licence_sign_key, session_key, 16); |
memcpy(licence_sign_key, session_key, 16); |
44 |
|
|
45 |
/* Generate RC4 key */ |
/* Generate RC4 key */ |
46 |
sec_hash_16(licence_key, &session_key[16], client_key, server_key); |
sec_hash_16(licence_key, &session_key[16], client_key, server_key); |
47 |
} |
} |
48 |
|
|
49 |
/* Send a licence request packet */ |
/* Send a licence request packet */ |
50 |
static void licence_send_request(uint8 *client_random, uint8 *rsa_data, |
static void |
51 |
char *user, char *host) |
licence_send_request(uint8 *client_random, uint8 *rsa_data, |
52 |
|
char *user, char *host) |
53 |
{ |
{ |
54 |
uint32 sec_flags = SEC_LICENCE_NEG; |
uint32 sec_flags = SEC_LICENCE_NEG; |
55 |
uint16 userlen = strlen(user) + 1; |
uint16 userlen = strlen(user) + 1; |
84 |
} |
} |
85 |
|
|
86 |
/* Process a licence demand packet */ |
/* Process a licence demand packet */ |
87 |
static void licence_process_demand(STREAM s) |
static void |
88 |
|
licence_process_demand(STREAM s) |
89 |
{ |
{ |
90 |
uint8 null_data[SEC_MODULUS_SIZE]; |
uint8 null_data[SEC_MODULUS_SIZE]; |
91 |
uint8 *server_random; |
uint8 *server_random; |
103 |
} |
} |
104 |
|
|
105 |
/* Send an authentication response packet */ |
/* Send an authentication response packet */ |
106 |
static void licence_send_authresp(uint8 *token, uint8 *crypt_hwid, |
static void |
107 |
uint8 *signature) |
licence_send_authresp(uint8 *token, uint8 *crypt_hwid, uint8 *signature) |
108 |
{ |
{ |
109 |
uint32 sec_flags = SEC_LICENCE_NEG; |
uint32 sec_flags = SEC_LICENCE_NEG; |
110 |
uint16 length = 58; |
uint16 length = 58; |
130 |
} |
} |
131 |
|
|
132 |
/* Parse an authentication request packet */ |
/* Parse an authentication request packet */ |
133 |
static BOOL licence_parse_authreq(STREAM s, uint8 **token, uint8 **signature) |
static BOOL |
134 |
|
licence_parse_authreq(STREAM s, uint8 **token, uint8 **signature) |
135 |
{ |
{ |
136 |
uint16 tokenlen; |
uint16 tokenlen; |
137 |
|
|
138 |
in_uint8s(s, 6); /* unknown: f8 3d 15 00 04 f6 */ |
in_uint8s(s, 6); /* unknown: f8 3d 15 00 04 f6 */ |
139 |
|
|
140 |
in_uint16_le(s, tokenlen); |
in_uint16_le(s, tokenlen); |
141 |
if (tokenlen != LICENCE_TOKEN_SIZE) |
if (tokenlen != LICENCE_TOKEN_SIZE) |
151 |
} |
} |
152 |
|
|
153 |
/* Process an authentication request packet */ |
/* Process an authentication request packet */ |
154 |
static void licence_process_authreq(STREAM s) |
static void |
155 |
|
licence_process_authreq(STREAM s) |
156 |
{ |
{ |
157 |
uint8 *in_token, *in_sig; |
uint8 *in_token, *in_sig; |
158 |
uint8 out_token[LICENCE_TOKEN_SIZE], decrypt_token[LICENCE_TOKEN_SIZE]; |
uint8 out_token[LICENCE_TOKEN_SIZE], |
159 |
|
decrypt_token[LICENCE_TOKEN_SIZE]; |
160 |
uint8 hwid[LICENCE_HWID_SIZE], crypt_hwid[LICENCE_HWID_SIZE]; |
uint8 hwid[LICENCE_HWID_SIZE], crypt_hwid[LICENCE_HWID_SIZE]; |
161 |
uint8 sealed_buffer[LICENCE_TOKEN_SIZE + LICENCE_HWID_SIZE]; |
uint8 sealed_buffer[LICENCE_TOKEN_SIZE + LICENCE_HWID_SIZE]; |
162 |
uint8 out_sig[LICENCE_SIGNATURE_SIZE]; |
uint8 out_sig[LICENCE_SIGNATURE_SIZE]; |
178 |
memcpy(sealed_buffer, decrypt_token, LICENCE_TOKEN_SIZE); |
memcpy(sealed_buffer, decrypt_token, LICENCE_TOKEN_SIZE); |
179 |
memcpy(sealed_buffer + LICENCE_TOKEN_SIZE, hwid, LICENCE_HWID_SIZE); |
memcpy(sealed_buffer + LICENCE_TOKEN_SIZE, hwid, LICENCE_HWID_SIZE); |
180 |
sec_sign(out_sig, licence_sign_key, 16, |
sec_sign(out_sig, licence_sign_key, 16, |
181 |
sealed_buffer, sizeof(sealed_buffer)); |
sealed_buffer, sizeof(sealed_buffer)); |
182 |
|
|
183 |
/* Deliberately break signature if licencing disabled */ |
/* Deliberately break signature if licencing disabled */ |
184 |
if (!licence) |
if (!licence) |
192 |
} |
} |
193 |
|
|
194 |
/* Process an licence issue packet */ |
/* Process an licence issue packet */ |
195 |
static void licence_process_issue(STREAM s) |
static void |
196 |
|
licence_process_issue(STREAM s) |
197 |
{ |
{ |
198 |
RC4_KEY crypt_key; |
RC4_KEY crypt_key; |
199 |
uint32 length; |
uint32 length; |
200 |
uint16 check; |
uint16 check; |
201 |
|
|
202 |
in_uint8s(s, 2); /* 3d 45 - unknown */ |
in_uint8s(s, 2); /* 3d 45 - unknown */ |
203 |
in_uint16_le(s, length); |
in_uint16_le(s, length); |
204 |
if (!s_check_rem(s, length)) |
if (!s_check_rem(s, length)) |
205 |
return; |
return; |
216 |
} |
} |
217 |
|
|
218 |
/* Process a licence packet */ |
/* Process a licence packet */ |
219 |
void licence_process(STREAM s) |
void |
220 |
|
licence_process(STREAM s) |
221 |
{ |
{ |
222 |
uint16 tag; |
uint16 tag; |
223 |
|
|
224 |
in_uint16_le(s, tag); |
in_uint16_le(s, tag); |
225 |
in_uint8s(s, 2); /* length */ |
in_uint8s(s, 2); /* length */ |
226 |
|
|
227 |
switch (tag) |
switch (tag) |
228 |
{ |
{ |