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it under the terms of the GNU General Public License as published by |
it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
(at your option) any later version. |
10 |
|
|
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This program is distributed in the hope that it will be useful, |
This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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, |
36 |
|
uint8 * client_rsa) |
37 |
{ |
{ |
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uint8 session_key[48]; |
uint8 session_key[48]; |
39 |
uint8 temp_hash[48]; |
uint8 temp_hash[48]; |
49 |
sec_hash_16(licence_key, &session_key[16], client_key, server_key); |
sec_hash_16(licence_key, &session_key[16], client_key, server_key); |
50 |
} |
} |
51 |
|
|
52 |
|
static void |
53 |
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licence_generate_hwid(uint8 * hwid) |
54 |
|
{ |
55 |
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buf_out_uint32(hwid, 2); |
56 |
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strncpy((char *)(hwid + 4), hostname, LICENCE_HWID_SIZE - 4); |
57 |
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} |
58 |
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|
59 |
|
/* Present an existing licence to the server */ |
60 |
|
static void |
61 |
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licence_present(uint8 * client_random, uint8 * rsa_data, |
62 |
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uint8 * licence_data, int licence_size, |
63 |
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uint8 * hwid, uint8 * signature) |
64 |
|
{ |
65 |
|
uint32 sec_flags = SEC_LICENCE_NEG; |
66 |
|
uint16 length = |
67 |
|
16 + SEC_RANDOM_SIZE + SEC_MODULUS_SIZE + SEC_PADDING_SIZE + |
68 |
|
licence_size + LICENCE_HWID_SIZE + LICENCE_SIGNATURE_SIZE; |
69 |
|
STREAM s; |
70 |
|
|
71 |
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s = sec_init(sec_flags, length + 4); |
72 |
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|
73 |
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out_uint16_le(s, LICENCE_TAG_PRESENT); |
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out_uint16_le(s, length); |
75 |
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|
76 |
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out_uint32_le(s, 1); |
77 |
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out_uint16(s, 0); |
78 |
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out_uint16_le(s, 0x0201); |
79 |
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|
80 |
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out_uint8p(s, client_random, SEC_RANDOM_SIZE); |
81 |
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out_uint16(s, 0); |
82 |
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out_uint16_le(s, (SEC_MODULUS_SIZE + SEC_PADDING_SIZE)); |
83 |
|
out_uint8p(s, rsa_data, SEC_MODULUS_SIZE); |
84 |
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out_uint8s(s, SEC_PADDING_SIZE); |
85 |
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|
86 |
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out_uint16_le(s, 1); |
87 |
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out_uint16_le(s, licence_size); |
88 |
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out_uint8p(s, licence_data, licence_size); |
89 |
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|
90 |
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out_uint16_le(s, 1); |
91 |
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out_uint16_le(s, LICENCE_HWID_SIZE); |
92 |
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out_uint8p(s, hwid, LICENCE_HWID_SIZE); |
93 |
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|
94 |
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out_uint8p(s, signature, LICENCE_SIGNATURE_SIZE); |
95 |
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|
96 |
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s_mark_end(s); |
97 |
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sec_send(s, sec_flags); |
98 |
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} |
99 |
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|
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, |
103 |
char *user, char *host) |
char *user, char *host) |
104 |
{ |
{ |
105 |
uint32 sec_flags = SEC_LICENCE_NEG; |
uint32 sec_flags = SEC_LICENCE_NEG; |
106 |
uint16 userlen = strlen(user) + 1; |
uint16 userlen = strlen(user) + 1; |
107 |
uint16 hostlen = strlen(host) + 1; |
uint16 hostlen = strlen(host) + 1; |
108 |
uint16 length = 120 + userlen + hostlen; |
uint16 length = 128 + userlen + hostlen; |
109 |
STREAM s; |
STREAM s; |
110 |
|
|
111 |
s = sec_init(sec_flags, length + 2); |
s = sec_init(sec_flags, length + 2); |
114 |
out_uint16_le(s, length); |
out_uint16_le(s, length); |
115 |
|
|
116 |
out_uint32_le(s, 1); |
out_uint32_le(s, 1); |
117 |
out_uint32_le(s, 0xff010000); |
out_uint16(s, 0); |
118 |
|
out_uint16_le(s, 0xff01); |
119 |
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|
120 |
out_uint8p(s, client_random, SEC_RANDOM_SIZE); |
out_uint8p(s, client_random, SEC_RANDOM_SIZE); |
121 |
out_uint16(s, 0); |
out_uint16(s, 0); |
140 |
licence_process_demand(STREAM s) |
licence_process_demand(STREAM s) |
141 |
{ |
{ |
142 |
uint8 null_data[SEC_MODULUS_SIZE]; |
uint8 null_data[SEC_MODULUS_SIZE]; |
143 |
|
uint8 hwid[LICENCE_HWID_SIZE]; |
144 |
|
uint8 signature[LICENCE_SIGNATURE_SIZE]; |
145 |
uint8 *server_random; |
uint8 *server_random; |
146 |
|
uint8 *licence_data; |
147 |
|
int licence_size; |
148 |
|
RC4_KEY crypt_key; |
149 |
|
|
150 |
/* Retrieve the server random from the incoming packet */ |
/* Retrieve the server random from the incoming packet */ |
151 |
in_uint8p(s, server_random, SEC_RANDOM_SIZE); |
in_uint8p(s, server_random, SEC_RANDOM_SIZE); |
155 |
memset(null_data, 0, sizeof(null_data)); |
memset(null_data, 0, sizeof(null_data)); |
156 |
licence_generate_keys(null_data, server_random, null_data); |
licence_generate_keys(null_data, server_random, null_data); |
157 |
|
|
158 |
/* Send a certificate request back to the server */ |
licence_size = load_licence(&licence_data); |
159 |
licence_send_request(null_data, null_data, username, hostname); |
if (licence_size == -1) |
160 |
|
{ |
161 |
|
licence_send_request(null_data, null_data, username, |
162 |
|
hostname); |
163 |
|
return; |
164 |
|
} |
165 |
|
|
166 |
|
/* Generate a signature for the HWID buffer */ |
167 |
|
licence_generate_hwid(hwid); |
168 |
|
sec_sign(signature, 16, licence_sign_key, 16, hwid, sizeof(hwid)); |
169 |
|
|
170 |
|
/* Now encrypt the HWID */ |
171 |
|
RC4_set_key(&crypt_key, 16, licence_key); |
172 |
|
RC4(&crypt_key, sizeof(hwid), hwid, hwid); |
173 |
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|
174 |
|
licence_present(null_data, null_data, licence_data, licence_size, |
175 |
|
hwid, signature); |
176 |
|
xfree(licence_data); |
177 |
} |
} |
178 |
|
|
179 |
/* Send an authentication response packet */ |
/* Send an authentication response packet */ |
180 |
static void |
static void |
181 |
licence_send_authresp(uint8 *token, uint8 *crypt_hwid, uint8 *signature) |
licence_send_authresp(uint8 * token, uint8 * crypt_hwid, uint8 * signature) |
182 |
{ |
{ |
183 |
uint32 sec_flags = SEC_LICENCE_NEG; |
uint32 sec_flags = SEC_LICENCE_NEG; |
184 |
uint16 length = 58; |
uint16 length = 58; |
205 |
|
|
206 |
/* Parse an authentication request packet */ |
/* Parse an authentication request packet */ |
207 |
static BOOL |
static BOOL |
208 |
licence_parse_authreq(STREAM s, uint8 **token, uint8 **signature) |
licence_parse_authreq(STREAM s, uint8 ** token, uint8 ** signature) |
209 |
{ |
{ |
210 |
uint16 tokenlen; |
uint16 tokenlen; |
211 |
|
|
244 |
RC4_set_key(&crypt_key, 16, licence_key); |
RC4_set_key(&crypt_key, 16, licence_key); |
245 |
RC4(&crypt_key, LICENCE_TOKEN_SIZE, in_token, decrypt_token); |
RC4(&crypt_key, LICENCE_TOKEN_SIZE, in_token, decrypt_token); |
246 |
|
|
|
/* Construct HWID */ |
|
|
buf_out_uint32(hwid, 2); |
|
|
strncpy(hwid + 4, hostname, LICENCE_HWID_SIZE - 4); |
|
|
|
|
247 |
/* Generate a signature for a buffer of token and HWID */ |
/* Generate a signature for a buffer of token and HWID */ |
248 |
|
licence_generate_hwid(hwid); |
249 |
memcpy(sealed_buffer, decrypt_token, LICENCE_TOKEN_SIZE); |
memcpy(sealed_buffer, decrypt_token, LICENCE_TOKEN_SIZE); |
250 |
memcpy(sealed_buffer + LICENCE_TOKEN_SIZE, hwid, LICENCE_HWID_SIZE); |
memcpy(sealed_buffer + LICENCE_TOKEN_SIZE, hwid, LICENCE_HWID_SIZE); |
251 |
sec_sign(out_sig, licence_sign_key, 16, |
sec_sign(out_sig, 16, licence_sign_key, 16, |
252 |
sealed_buffer, sizeof(sealed_buffer)); |
sealed_buffer, sizeof(sealed_buffer)); |
253 |
|
|
254 |
/* Deliberately break signature if licencing disabled */ |
/* Deliberately break signature if licencing disabled */ |
283 |
return; |
return; |
284 |
|
|
285 |
licence_issued = True; |
licence_issued = True; |
286 |
|
save_licence(s->p, length - 2); |
|
/* We should save the licence here */ |
|
287 |
} |
} |
288 |
|
|
289 |
/* Process a licence packet */ |
/* Process a licence packet */ |
309 |
licence_process_issue(s); |
licence_process_issue(s); |
310 |
break; |
break; |
311 |
|
|
312 |
|
case LICENCE_TAG_REISSUE: |
313 |
|
break; |
314 |
|
|
315 |
case LICENCE_TAG_RESULT: |
case LICENCE_TAG_RESULT: |
316 |
break; |
break; |
317 |
|
|