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58964a49 RE |
1 | /* ssl/t1_lib.c */ |
2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
3 | * All rights reserved. | |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
8 | * | |
9 | * This library is free for commercial and non-commercial use as long as | |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
15 | * | |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in | |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
22 | * | |
23 | * Redistribution and use in source and binary forms, with or without | |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
37 | * 4. If you include any Windows specific code (or a derivative thereof) from | |
38 | * the apps directory (application code) you must include an acknowledgement: | |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40 | * | |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
52 | * | |
53 | * The licence and distribution terms for any publically available version or | |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
f1fd4544 | 58 | /* ==================================================================== |
52b8dad8 | 59 | * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. |
f1fd4544 BM |
60 | * |
61 | * Redistribution and use in source and binary forms, with or without | |
62 | * modification, are permitted provided that the following conditions | |
63 | * are met: | |
64 | * | |
65 | * 1. Redistributions of source code must retain the above copyright | |
66 | * notice, this list of conditions and the following disclaimer. | |
67 | * | |
68 | * 2. Redistributions in binary form must reproduce the above copyright | |
69 | * notice, this list of conditions and the following disclaimer in | |
70 | * the documentation and/or other materials provided with the | |
71 | * distribution. | |
72 | * | |
73 | * 3. All advertising materials mentioning features or use of this | |
74 | * software must display the following acknowledgment: | |
75 | * "This product includes software developed by the OpenSSL Project | |
76 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
77 | * | |
78 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
79 | * endorse or promote products derived from this software without | |
80 | * prior written permission. For written permission, please contact | |
81 | * openssl-core@openssl.org. | |
82 | * | |
83 | * 5. Products derived from this software may not be called "OpenSSL" | |
84 | * nor may "OpenSSL" appear in their names without prior written | |
85 | * permission of the OpenSSL Project. | |
86 | * | |
87 | * 6. Redistributions of any form whatsoever must retain the following | |
88 | * acknowledgment: | |
89 | * "This product includes software developed by the OpenSSL Project | |
90 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
91 | * | |
92 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
93 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
94 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
95 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
96 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
97 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
98 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
99 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
100 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
101 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
102 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
103 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
104 | * ==================================================================== | |
105 | * | |
106 | * This product includes cryptographic software written by Eric Young | |
107 | * (eay@cryptsoft.com). This product includes software written by Tim | |
108 | * Hudson (tjh@cryptsoft.com). | |
109 | * | |
110 | */ | |
58964a49 RE |
111 | |
112 | #include <stdio.h> | |
ec577822 | 113 | #include <openssl/objects.h> |
6434abbf DSH |
114 | #include <openssl/evp.h> |
115 | #include <openssl/hmac.h> | |
67c8e7f4 | 116 | #include <openssl/ocsp.h> |
58964a49 RE |
117 | #include "ssl_locl.h" |
118 | ||
42182852 | 119 | const char tls1_version_str[]="TLSv1" OPENSSL_VERSION_PTEXT; |
58964a49 | 120 | |
367eb1f1 | 121 | #ifndef OPENSSL_NO_TLSEXT |
6434abbf DSH |
122 | static int tls_decrypt_ticket(SSL *s, const unsigned char *tick, int ticklen, |
123 | const unsigned char *sess_id, int sesslen, | |
124 | SSL_SESSION **psess); | |
367eb1f1 | 125 | #endif |
6434abbf | 126 | |
f3b656b2 | 127 | SSL3_ENC_METHOD TLSv1_enc_data={ |
58964a49 RE |
128 | tls1_enc, |
129 | tls1_mac, | |
130 | tls1_setup_key_block, | |
131 | tls1_generate_master_secret, | |
132 | tls1_change_cipher_state, | |
133 | tls1_final_finish_mac, | |
134 | TLS1_FINISH_MAC_LENGTH, | |
135 | tls1_cert_verify_mac, | |
136 | TLS_MD_CLIENT_FINISH_CONST,TLS_MD_CLIENT_FINISH_CONST_SIZE, | |
137 | TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE, | |
138 | tls1_alert_code, | |
139 | }; | |
140 | ||
f3b656b2 | 141 | long tls1_default_timeout(void) |
58964a49 RE |
142 | { |
143 | /* 2 hours, the 24 hours mentioned in the TLSv1 spec | |
144 | * is way too long for http, the cache would over fill */ | |
145 | return(60*60*2); | |
146 | } | |
147 | ||
6b691a5c | 148 | int tls1_new(SSL *s) |
58964a49 RE |
149 | { |
150 | if (!ssl3_new(s)) return(0); | |
151 | s->method->ssl_clear(s); | |
152 | return(1); | |
153 | } | |
154 | ||
6b691a5c | 155 | void tls1_free(SSL *s) |
58964a49 | 156 | { |
12bf56c0 DSH |
157 | #ifndef OPENSSL_NO_TLSEXT |
158 | if (s->tlsext_session_ticket) | |
159 | { | |
160 | OPENSSL_free(s->tlsext_session_ticket); | |
161 | } | |
162 | #endif /* OPENSSL_NO_TLSEXT */ | |
58964a49 RE |
163 | ssl3_free(s); |
164 | } | |
165 | ||
6b691a5c | 166 | void tls1_clear(SSL *s) |
58964a49 RE |
167 | { |
168 | ssl3_clear(s); | |
637f374a | 169 | s->version = s->method->version; |
58964a49 RE |
170 | } |
171 | ||
525de5d3 DSH |
172 | #ifndef OPENSSL_NO_EC |
173 | static int nid_list[] = | |
174 | { | |
175 | NID_sect163k1, /* sect163k1 (1) */ | |
176 | NID_sect163r1, /* sect163r1 (2) */ | |
177 | NID_sect163r2, /* sect163r2 (3) */ | |
178 | NID_sect193r1, /* sect193r1 (4) */ | |
179 | NID_sect193r2, /* sect193r2 (5) */ | |
180 | NID_sect233k1, /* sect233k1 (6) */ | |
181 | NID_sect233r1, /* sect233r1 (7) */ | |
182 | NID_sect239k1, /* sect239k1 (8) */ | |
183 | NID_sect283k1, /* sect283k1 (9) */ | |
184 | NID_sect283r1, /* sect283r1 (10) */ | |
185 | NID_sect409k1, /* sect409k1 (11) */ | |
186 | NID_sect409r1, /* sect409r1 (12) */ | |
187 | NID_sect571k1, /* sect571k1 (13) */ | |
188 | NID_sect571r1, /* sect571r1 (14) */ | |
189 | NID_secp160k1, /* secp160k1 (15) */ | |
190 | NID_secp160r1, /* secp160r1 (16) */ | |
191 | NID_secp160r2, /* secp160r2 (17) */ | |
192 | NID_secp192k1, /* secp192k1 (18) */ | |
193 | NID_X9_62_prime192v1, /* secp192r1 (19) */ | |
194 | NID_secp224k1, /* secp224k1 (20) */ | |
195 | NID_secp224r1, /* secp224r1 (21) */ | |
196 | NID_secp256k1, /* secp256k1 (22) */ | |
197 | NID_X9_62_prime256v1, /* secp256r1 (23) */ | |
198 | NID_secp384r1, /* secp384r1 (24) */ | |
199 | NID_secp521r1 /* secp521r1 (25) */ | |
200 | }; | |
201 | ||
202 | int tls1_ec_curve_id2nid(int curve_id) | |
203 | { | |
204 | /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */ | |
1e26a8ba GT |
205 | if ((curve_id < 1) || ((unsigned int)curve_id > |
206 | sizeof(nid_list)/sizeof(nid_list[0]))) | |
207 | return 0; | |
525de5d3 DSH |
208 | return nid_list[curve_id-1]; |
209 | } | |
210 | ||
211 | int tls1_ec_nid2curve_id(int nid) | |
212 | { | |
213 | /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */ | |
214 | switch (nid) | |
215 | { | |
216 | case NID_sect163k1: /* sect163k1 (1) */ | |
217 | return 1; | |
218 | case NID_sect163r1: /* sect163r1 (2) */ | |
219 | return 2; | |
220 | case NID_sect163r2: /* sect163r2 (3) */ | |
221 | return 3; | |
222 | case NID_sect193r1: /* sect193r1 (4) */ | |
223 | return 4; | |
224 | case NID_sect193r2: /* sect193r2 (5) */ | |
225 | return 5; | |
226 | case NID_sect233k1: /* sect233k1 (6) */ | |
227 | return 6; | |
228 | case NID_sect233r1: /* sect233r1 (7) */ | |
229 | return 7; | |
230 | case NID_sect239k1: /* sect239k1 (8) */ | |
231 | return 8; | |
232 | case NID_sect283k1: /* sect283k1 (9) */ | |
233 | return 9; | |
234 | case NID_sect283r1: /* sect283r1 (10) */ | |
235 | return 10; | |
236 | case NID_sect409k1: /* sect409k1 (11) */ | |
237 | return 11; | |
238 | case NID_sect409r1: /* sect409r1 (12) */ | |
239 | return 12; | |
240 | case NID_sect571k1: /* sect571k1 (13) */ | |
241 | return 13; | |
242 | case NID_sect571r1: /* sect571r1 (14) */ | |
243 | return 14; | |
244 | case NID_secp160k1: /* secp160k1 (15) */ | |
245 | return 15; | |
246 | case NID_secp160r1: /* secp160r1 (16) */ | |
247 | return 16; | |
248 | case NID_secp160r2: /* secp160r2 (17) */ | |
249 | return 17; | |
250 | case NID_secp192k1: /* secp192k1 (18) */ | |
251 | return 18; | |
252 | case NID_X9_62_prime192v1: /* secp192r1 (19) */ | |
253 | return 19; | |
254 | case NID_secp224k1: /* secp224k1 (20) */ | |
255 | return 20; | |
256 | case NID_secp224r1: /* secp224r1 (21) */ | |
257 | return 21; | |
258 | case NID_secp256k1: /* secp256k1 (22) */ | |
259 | return 22; | |
260 | case NID_X9_62_prime256v1: /* secp256r1 (23) */ | |
261 | return 23; | |
262 | case NID_secp384r1: /* secp384r1 (24) */ | |
263 | return 24; | |
264 | case NID_secp521r1: /* secp521r1 (25) */ | |
265 | return 25; | |
266 | default: | |
267 | return 0; | |
268 | } | |
269 | } | |
270 | #endif /* OPENSSL_NO_EC */ | |
f1fd4544 | 271 | |
ed3883d2 | 272 | #ifndef OPENSSL_NO_TLSEXT |
f1fd4544 BM |
273 | unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned char *limit) |
274 | { | |
ed3883d2 BM |
275 | int extdatalen=0; |
276 | unsigned char *ret = p; | |
277 | ||
13f6d57b DSH |
278 | /* don't add extensions for SSLv3 unless doing secure renegotiation */ |
279 | if (s->client_version == SSL3_VERSION | |
280 | && !s->s3->send_connection_binding) | |
5f8f94a6 DSH |
281 | return p; |
282 | ||
ed3883d2 BM |
283 | ret+=2; |
284 | ||
285 | if (ret>=limit) return NULL; /* this really never occurs, but ... */ | |
6434abbf | 286 | |
a70183bc | 287 | if (s->tlsext_hostname != NULL) |
f1fd4544 | 288 | { |
ed3883d2 BM |
289 | /* Add TLS extension servername to the Client Hello message */ |
290 | unsigned long size_str; | |
291 | long lenmax; | |
292 | ||
a70183bc | 293 | /* check for enough space. |
52b8dad8 BM |
294 | 4 for the servername type and entension length |
295 | 2 for servernamelist length | |
296 | 1 for the hostname type | |
297 | 2 for hostname length | |
298 | + hostname length | |
a70183bc | 299 | */ |
52b8dad8 | 300 | |
761772d7 BM |
301 | if ((lenmax = limit - ret - 9) < 0 |
302 | || (size_str = strlen(s->tlsext_hostname)) > (unsigned long)lenmax) | |
a70183bc BM |
303 | return NULL; |
304 | ||
305 | /* extension type and length */ | |
306 | s2n(TLSEXT_TYPE_server_name,ret); | |
307 | s2n(size_str+5,ret); | |
f1fd4544 | 308 | |
a70183bc | 309 | /* length of servername list */ |
ed3883d2 | 310 | s2n(size_str+3,ret); |
a70183bc BM |
311 | |
312 | /* hostname type, length and hostname */ | |
f1fd4544 | 313 | *(ret++) = (unsigned char) TLSEXT_NAMETYPE_host_name; |
ed3883d2 | 314 | s2n(size_str,ret); |
ed3883d2 BM |
315 | memcpy(ret, s->tlsext_hostname, size_str); |
316 | ret+=size_str; | |
f1fd4544 | 317 | } |
761772d7 | 318 | |
423c66f1 | 319 | /* Add RI if renegotiating */ |
bdd53508 | 320 | if (s->renegotiate) |
423c66f1 | 321 | { |
860c3dd1 DSH |
322 | int el; |
323 | ||
324 | if(!ssl_add_clienthello_renegotiate_ext(s, 0, &el, 0)) | |
325 | { | |
326 | SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
327 | return NULL; | |
328 | } | |
329 | ||
330 | if((limit - p - 4 - el) < 0) return NULL; | |
331 | ||
332 | s2n(TLSEXT_TYPE_renegotiate,ret); | |
333 | s2n(el,ret); | |
334 | ||
335 | if(!ssl_add_clienthello_renegotiate_ext(s, ret, &el, el)) | |
336 | { | |
337 | SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
338 | return NULL; | |
339 | } | |
340 | ||
341 | ret += el; | |
342 | } | |
343 | ||
36ca4ba6 | 344 | #ifndef OPENSSL_NO_EC |
8025e251 DSH |
345 | if (s->tlsext_ecpointformatlist != NULL && |
346 | s->version != DTLS1_VERSION) | |
36ca4ba6 BM |
347 | { |
348 | /* Add TLS extension ECPointFormats to the ClientHello message */ | |
349 | long lenmax; | |
350 | ||
761772d7 | 351 | if ((lenmax = limit - ret - 5) < 0) return NULL; |
36ca4ba6 | 352 | if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL; |
019fdc78 BM |
353 | if (s->tlsext_ecpointformatlist_length > 255) |
354 | { | |
355 | SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
356 | return NULL; | |
357 | } | |
36ca4ba6 BM |
358 | |
359 | s2n(TLSEXT_TYPE_ec_point_formats,ret); | |
360 | s2n(s->tlsext_ecpointformatlist_length + 1,ret); | |
361 | *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length; | |
362 | memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length); | |
363 | ret+=s->tlsext_ecpointformatlist_length; | |
364 | } | |
8025e251 DSH |
365 | if (s->tlsext_ellipticcurvelist != NULL && |
366 | s->version != DTLS1_VERSION) | |
33273721 BM |
367 | { |
368 | /* Add TLS extension EllipticCurves to the ClientHello message */ | |
369 | long lenmax; | |
370 | ||
761772d7 | 371 | if ((lenmax = limit - ret - 6) < 0) return NULL; |
33273721 | 372 | if (s->tlsext_ellipticcurvelist_length > (unsigned long)lenmax) return NULL; |
a4974de9 | 373 | if (s->tlsext_ellipticcurvelist_length > 65532) |
33273721 BM |
374 | { |
375 | SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
376 | return NULL; | |
377 | } | |
378 | ||
379 | s2n(TLSEXT_TYPE_elliptic_curves,ret); | |
a123c552 | 380 | s2n(s->tlsext_ellipticcurvelist_length + 2, ret); |
a4974de9 BM |
381 | |
382 | /* NB: draft-ietf-tls-ecc-12.txt uses a one-byte prefix for | |
383 | * elliptic_curve_list, but the examples use two bytes. | |
384 | * http://www1.ietf.org/mail-archive/web/tls/current/msg00538.html | |
385 | * resolves this to two bytes. | |
386 | */ | |
a123c552 | 387 | s2n(s->tlsext_ellipticcurvelist_length, ret); |
33273721 BM |
388 | memcpy(ret, s->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist_length); |
389 | ret+=s->tlsext_ellipticcurvelist_length; | |
390 | } | |
36ca4ba6 | 391 | #endif /* OPENSSL_NO_EC */ |
d3442bc7 | 392 | |
6434abbf DSH |
393 | if (!(SSL_get_options(s) & SSL_OP_NO_TICKET)) |
394 | { | |
395 | int ticklen; | |
7ba3838a | 396 | if (!s->new_session && s->session && s->session->tlsext_tick) |
6434abbf | 397 | ticklen = s->session->tlsext_ticklen; |
12bf56c0 DSH |
398 | else if (s->session && s->tlsext_session_ticket && |
399 | s->tlsext_session_ticket->data) | |
400 | { | |
401 | ticklen = s->tlsext_session_ticket->length; | |
402 | s->session->tlsext_tick = OPENSSL_malloc(ticklen); | |
403 | if (!s->session->tlsext_tick) | |
404 | return NULL; | |
405 | memcpy(s->session->tlsext_tick, | |
406 | s->tlsext_session_ticket->data, | |
407 | ticklen); | |
408 | s->session->tlsext_ticklen = ticklen; | |
409 | } | |
6434abbf DSH |
410 | else |
411 | ticklen = 0; | |
12bf56c0 DSH |
412 | if (ticklen == 0 && s->tlsext_session_ticket && |
413 | s->tlsext_session_ticket->data == NULL) | |
414 | goto skip_ext; | |
6434abbf DSH |
415 | /* Check for enough room 2 for extension type, 2 for len |
416 | * rest for ticket | |
417 | */ | |
761772d7 | 418 | if ((long)(limit - ret - 4 - ticklen) < 0) return NULL; |
6434abbf DSH |
419 | s2n(TLSEXT_TYPE_session_ticket,ret); |
420 | s2n(ticklen,ret); | |
421 | if (ticklen) | |
422 | { | |
423 | memcpy(ret, s->session->tlsext_tick, ticklen); | |
424 | ret += ticklen; | |
425 | } | |
426 | } | |
12bf56c0 | 427 | skip_ext: |
6434abbf | 428 | |
761772d7 | 429 | #ifdef TLSEXT_TYPE_opaque_prf_input |
8025e251 DSH |
430 | if (s->s3->client_opaque_prf_input != NULL && |
431 | s->version != DTLS1_VERSION) | |
761772d7 BM |
432 | { |
433 | size_t col = s->s3->client_opaque_prf_input_len; | |
434 | ||
435 | if ((long)(limit - ret - 6 - col < 0)) | |
436 | return NULL; | |
437 | if (col > 0xFFFD) /* can't happen */ | |
438 | return NULL; | |
439 | ||
440 | s2n(TLSEXT_TYPE_opaque_prf_input, ret); | |
441 | s2n(col + 2, ret); | |
442 | s2n(col, ret); | |
443 | memcpy(ret, s->s3->client_opaque_prf_input, col); | |
444 | ret += col; | |
445 | } | |
446 | #endif | |
447 | ||
8025e251 DSH |
448 | if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp && |
449 | s->version != DTLS1_VERSION) | |
67c8e7f4 DSH |
450 | { |
451 | int i; | |
452 | long extlen, idlen, itmp; | |
453 | OCSP_RESPID *id; | |
454 | ||
455 | idlen = 0; | |
456 | for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++) | |
457 | { | |
458 | id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i); | |
459 | itmp = i2d_OCSP_RESPID(id, NULL); | |
460 | if (itmp <= 0) | |
461 | return NULL; | |
462 | idlen += itmp + 2; | |
463 | } | |
464 | ||
465 | if (s->tlsext_ocsp_exts) | |
466 | { | |
467 | extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL); | |
468 | if (extlen < 0) | |
469 | return NULL; | |
470 | } | |
471 | else | |
472 | extlen = 0; | |
473 | ||
474 | if ((long)(limit - ret - 7 - extlen - idlen) < 0) return NULL; | |
475 | s2n(TLSEXT_TYPE_status_request, ret); | |
476 | if (extlen + idlen > 0xFFF0) | |
477 | return NULL; | |
478 | s2n(extlen + idlen + 5, ret); | |
479 | *(ret++) = TLSEXT_STATUSTYPE_ocsp; | |
480 | s2n(idlen, ret); | |
481 | for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++) | |
482 | { | |
483 | /* save position of id len */ | |
484 | unsigned char *q = ret; | |
485 | id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i); | |
486 | /* skip over id len */ | |
487 | ret += 2; | |
488 | itmp = i2d_OCSP_RESPID(id, &ret); | |
489 | /* write id len */ | |
490 | s2n(itmp, q); | |
491 | } | |
492 | s2n(extlen, ret); | |
493 | if (extlen > 0) | |
494 | i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &ret); | |
495 | } | |
496 | ||
bf48836c | 497 | #ifndef OPENSSL_NO_NEXTPROTONEG |
ee2ffc27 BL |
498 | if (s->ctx->next_proto_select_cb && !s->s3->tmp.finish_md_len) |
499 | { | |
500 | /* The client advertises an emtpy extension to indicate its | |
501 | * support for Next Protocol Negotiation */ | |
502 | if (limit - ret - 4 < 0) | |
503 | return NULL; | |
504 | s2n(TLSEXT_TYPE_next_proto_neg,ret); | |
505 | s2n(0,ret); | |
506 | } | |
507 | #endif | |
508 | ||
ed3883d2 BM |
509 | if ((extdatalen = ret-p-2)== 0) |
510 | return p; | |
511 | ||
512 | s2n(extdatalen,p); | |
513 | return ret; | |
52b8dad8 | 514 | } |
ed3883d2 | 515 | |
f1fd4544 BM |
516 | unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit) |
517 | { | |
ed3883d2 BM |
518 | int extdatalen=0; |
519 | unsigned char *ret = p; | |
bf48836c BL |
520 | #ifndef OPENSSL_NO_NEXTPROTONEG |
521 | int next_proto_neg_seen; | |
ee2ffc27 | 522 | #endif |
ed3883d2 | 523 | |
13f6d57b DSH |
524 | /* don't add extensions for SSLv3, unless doing secure renegotiation */ |
525 | if (s->version == SSL3_VERSION && !s->s3->send_connection_binding) | |
5f8f94a6 DSH |
526 | return p; |
527 | ||
a13c20f6 | 528 | ret+=2; |
ed3883d2 BM |
529 | if (ret>=limit) return NULL; /* this really never occurs, but ... */ |
530 | ||
a13c20f6 | 531 | if (!s->hit && s->servername_done == 1 && s->session->tlsext_hostname != NULL) |
f1fd4544 | 532 | { |
761772d7 | 533 | if ((long)(limit - ret - 4) < 0) return NULL; |
ed3883d2 BM |
534 | |
535 | s2n(TLSEXT_TYPE_server_name,ret); | |
536 | s2n(0,ret); | |
f1fd4544 | 537 | } |
860c3dd1 | 538 | |
8025e251 | 539 | if(s->s3->send_connection_binding) |
860c3dd1 DSH |
540 | { |
541 | int el; | |
542 | ||
543 | if(!ssl_add_serverhello_renegotiate_ext(s, 0, &el, 0)) | |
544 | { | |
545 | SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
546 | return NULL; | |
547 | } | |
548 | ||
549 | if((limit - p - 4 - el) < 0) return NULL; | |
550 | ||
551 | s2n(TLSEXT_TYPE_renegotiate,ret); | |
552 | s2n(el,ret); | |
553 | ||
554 | if(!ssl_add_serverhello_renegotiate_ext(s, ret, &el, el)) | |
555 | { | |
556 | SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
557 | return NULL; | |
558 | } | |
559 | ||
560 | ret += el; | |
561 | } | |
562 | ||
36ca4ba6 | 563 | #ifndef OPENSSL_NO_EC |
8025e251 DSH |
564 | if (s->tlsext_ecpointformatlist != NULL && |
565 | s->version != DTLS1_VERSION) | |
36ca4ba6 BM |
566 | { |
567 | /* Add TLS extension ECPointFormats to the ServerHello message */ | |
568 | long lenmax; | |
569 | ||
761772d7 | 570 | if ((lenmax = limit - ret - 5) < 0) return NULL; |
36ca4ba6 | 571 | if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL; |
019fdc78 BM |
572 | if (s->tlsext_ecpointformatlist_length > 255) |
573 | { | |
574 | SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
575 | return NULL; | |
576 | } | |
36ca4ba6 BM |
577 | |
578 | s2n(TLSEXT_TYPE_ec_point_formats,ret); | |
579 | s2n(s->tlsext_ecpointformatlist_length + 1,ret); | |
580 | *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length; | |
581 | memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length); | |
582 | ret+=s->tlsext_ecpointformatlist_length; | |
a70183bc | 583 | |
36ca4ba6 | 584 | } |
33273721 | 585 | /* Currently the server should not respond with a SupportedCurves extension */ |
36ca4ba6 | 586 | #endif /* OPENSSL_NO_EC */ |
67c8e7f4 | 587 | |
6434abbf DSH |
588 | if (s->tlsext_ticket_expected |
589 | && !(SSL_get_options(s) & SSL_OP_NO_TICKET)) | |
590 | { | |
761772d7 | 591 | if ((long)(limit - ret - 4) < 0) return NULL; |
6434abbf DSH |
592 | s2n(TLSEXT_TYPE_session_ticket,ret); |
593 | s2n(0,ret); | |
594 | } | |
761772d7 | 595 | |
67c8e7f4 DSH |
596 | if (s->tlsext_status_expected) |
597 | { | |
598 | if ((long)(limit - ret - 4) < 0) return NULL; | |
599 | s2n(TLSEXT_TYPE_status_request,ret); | |
600 | s2n(0,ret); | |
601 | } | |
602 | ||
761772d7 | 603 | #ifdef TLSEXT_TYPE_opaque_prf_input |
8025e251 DSH |
604 | if (s->s3->server_opaque_prf_input != NULL && |
605 | s->version != DTLS1_VERSION) | |
761772d7 BM |
606 | { |
607 | size_t sol = s->s3->server_opaque_prf_input_len; | |
6434abbf | 608 | |
761772d7 BM |
609 | if ((long)(limit - ret - 6 - sol) < 0) |
610 | return NULL; | |
611 | if (sol > 0xFFFD) /* can't happen */ | |
612 | return NULL; | |
613 | ||
614 | s2n(TLSEXT_TYPE_opaque_prf_input, ret); | |
615 | s2n(sol + 2, ret); | |
616 | s2n(sol, ret); | |
617 | memcpy(ret, s->s3->server_opaque_prf_input, sol); | |
618 | ret += sol; | |
619 | } | |
620 | #endif | |
0e1dba93 DSH |
621 | if (((s->s3->tmp.new_cipher->id & 0xFFFF)==0x80 || (s->s3->tmp.new_cipher->id & 0xFFFF)==0x81) |
622 | && (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG)) | |
623 | { const unsigned char cryptopro_ext[36] = { | |
624 | 0xfd, 0xe8, /*65000*/ | |
625 | 0x00, 0x20, /*32 bytes length*/ | |
626 | 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85, | |
627 | 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06, | |
628 | 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08, | |
629 | 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17}; | |
630 | if (limit-ret<36) return NULL; | |
631 | memcpy(ret,cryptopro_ext,36); | |
632 | ret+=36; | |
633 | ||
634 | } | |
761772d7 | 635 | |
bf48836c | 636 | #ifndef OPENSSL_NO_NEXTPROTONEG |
ee2ffc27 BL |
637 | next_proto_neg_seen = s->s3->next_proto_neg_seen; |
638 | s->s3->next_proto_neg_seen = 0; | |
639 | if (next_proto_neg_seen && s->ctx->next_protos_advertised_cb) | |
640 | { | |
641 | const unsigned char *npa; | |
642 | unsigned int npalen; | |
643 | int r; | |
644 | ||
645 | r = s->ctx->next_protos_advertised_cb(s, &npa, &npalen, s->ctx->next_protos_advertised_cb_arg); | |
646 | if (r == SSL_TLSEXT_ERR_OK) | |
647 | { | |
648 | if ((long)(limit - ret - 4 - npalen) < 0) return NULL; | |
649 | s2n(TLSEXT_TYPE_next_proto_neg,ret); | |
650 | s2n(npalen,ret); | |
651 | memcpy(ret, npa, npalen); | |
652 | ret += npalen; | |
653 | s->s3->next_proto_neg_seen = 1; | |
654 | } | |
655 | } | |
656 | #endif | |
657 | ||
ed3883d2 BM |
658 | if ((extdatalen = ret-p-2)== 0) |
659 | return p; | |
660 | ||
661 | s2n(extdatalen,p); | |
662 | return ret; | |
52b8dad8 | 663 | } |
ed3883d2 | 664 | |
f1fd4544 BM |
665 | int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al) |
666 | { | |
ed3883d2 BM |
667 | unsigned short type; |
668 | unsigned short size; | |
669 | unsigned short len; | |
f1fd4544 | 670 | unsigned char *data = *p; |
860c3dd1 DSH |
671 | int renegotiate_seen = 0; |
672 | ||
a13c20f6 | 673 | s->servername_done = 0; |
67c8e7f4 | 674 | s->tlsext_status_type = -1; |
ed3883d2 BM |
675 | |
676 | if (data >= (d+n-2)) | |
c27c9cb4 | 677 | goto ri_check; |
ed3883d2 BM |
678 | n2s(data,len); |
679 | ||
52b8dad8 | 680 | if (data > (d+n-len)) |
c27c9cb4 | 681 | goto ri_check; |
ed3883d2 | 682 | |
f1fd4544 BM |
683 | while (data <= (d+n-4)) |
684 | { | |
ed3883d2 BM |
685 | n2s(data,type); |
686 | n2s(data,size); | |
687 | ||
688 | if (data+size > (d+n)) | |
c27c9cb4 | 689 | goto ri_check; |
8e3b2dbb | 690 | #if 0 |
0e1dba93 | 691 | fprintf(stderr,"Received extension type %d size %d\n",type,size); |
8e3b2dbb | 692 | #endif |
6434abbf DSH |
693 | if (s->tlsext_debug_cb) |
694 | s->tlsext_debug_cb(s, 0, type, data, size, | |
695 | s->tlsext_debug_arg); | |
a13c20f6 BM |
696 | /* The servername extension is treated as follows: |
697 | ||
698 | - Only the hostname type is supported with a maximum length of 255. | |
699 | - The servername is rejected if too long or if it contains zeros, | |
700 | in which case an fatal alert is generated. | |
701 | - The servername field is maintained together with the session cache. | |
702 | - When a session is resumed, the servername call back invoked in order | |
703 | to allow the application to position itself to the right context. | |
704 | - The servername is acknowledged if it is new for a session or when | |
705 | it is identical to a previously used for the same session. | |
706 | Applications can control the behaviour. They can at any time | |
707 | set a 'desirable' servername for a new SSL object. This can be the | |
708 | case for example with HTTPS when a Host: header field is received and | |
709 | a renegotiation is requested. In this case, a possible servername | |
710 | presented in the new client hello is only acknowledged if it matches | |
711 | the value of the Host: field. | |
712 | - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION | |
713 | if they provide for changing an explicit servername context for the session, | |
714 | i.e. when the session has been established with a servername extension. | |
715 | - On session reconnect, the servername extension may be absent. | |
716 | ||
717 | */ | |
718 | ||
f1fd4544 BM |
719 | if (type == TLSEXT_TYPE_server_name) |
720 | { | |
a70183bc | 721 | unsigned char *sdata; |
ed3883d2 | 722 | int servname_type; |
a70183bc BM |
723 | int dsize; |
724 | ||
725 | if (size < 2) | |
726 | { | |
727 | *al = SSL_AD_DECODE_ERROR; | |
728 | return 0; | |
729 | } | |
730 | n2s(data,dsize); | |
52b8dad8 | 731 | size -= 2; |
a70183bc | 732 | if (dsize > size ) |
f1fd4544 | 733 | { |
a70183bc BM |
734 | *al = SSL_AD_DECODE_ERROR; |
735 | return 0; | |
736 | } | |
737 | ||
738 | sdata = data; | |
739 | while (dsize > 3) | |
740 | { | |
741 | servname_type = *(sdata++); | |
ed3883d2 | 742 | n2s(sdata,len); |
a70183bc BM |
743 | dsize -= 3; |
744 | ||
745 | if (len > dsize) | |
f1fd4544 BM |
746 | { |
747 | *al = SSL_AD_DECODE_ERROR; | |
748 | return 0; | |
749 | } | |
a70183bc | 750 | if (s->servername_done == 0) |
f1fd4544 BM |
751 | switch (servname_type) |
752 | { | |
753 | case TLSEXT_NAMETYPE_host_name: | |
52b8dad8 | 754 | if (s->session->tlsext_hostname == NULL) |
f1fd4544 | 755 | { |
a13c20f6 | 756 | if (len > TLSEXT_MAXLEN_host_name || |
ed3883d2 | 757 | ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL)) |
f1fd4544 BM |
758 | { |
759 | *al = TLS1_AD_UNRECOGNIZED_NAME; | |
760 | return 0; | |
761 | } | |
ed3883d2 | 762 | memcpy(s->session->tlsext_hostname, sdata, len); |
a13c20f6 BM |
763 | s->session->tlsext_hostname[len]='\0'; |
764 | if (strlen(s->session->tlsext_hostname) != len) { | |
765 | OPENSSL_free(s->session->tlsext_hostname); | |
40a70628 | 766 | s->session->tlsext_hostname = NULL; |
a13c20f6 BM |
767 | *al = TLS1_AD_UNRECOGNIZED_NAME; |
768 | return 0; | |
f1fd4544 | 769 | } |
a13c20f6 BM |
770 | s->servername_done = 1; |
771 | ||
a13c20f6 BM |
772 | } |
773 | else | |
774 | s->servername_done = strlen(s->session->tlsext_hostname) == len | |
6b9e941e | 775 | && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0; |
a13c20f6 | 776 | |
ed3883d2 | 777 | break; |
f1fd4544 | 778 | |
ed3883d2 BM |
779 | default: |
780 | break; | |
f1fd4544 | 781 | } |
52b8dad8 | 782 | |
a70183bc | 783 | dsize -= len; |
f1fd4544 | 784 | } |
a70183bc BM |
785 | if (dsize != 0) |
786 | { | |
787 | *al = SSL_AD_DECODE_ERROR; | |
788 | return 0; | |
789 | } | |
790 | ||
ed3883d2 | 791 | } |
ed3883d2 | 792 | |
36ca4ba6 | 793 | #ifndef OPENSSL_NO_EC |
8025e251 DSH |
794 | else if (type == TLSEXT_TYPE_ec_point_formats && |
795 | s->version != DTLS1_VERSION) | |
36ca4ba6 BM |
796 | { |
797 | unsigned char *sdata = data; | |
798 | int ecpointformatlist_length = *(sdata++); | |
36ca4ba6 BM |
799 | |
800 | if (ecpointformatlist_length != size - 1) | |
801 | { | |
802 | *al = TLS1_AD_DECODE_ERROR; | |
803 | return 0; | |
804 | } | |
805 | s->session->tlsext_ecpointformatlist_length = 0; | |
b6acb8d0 | 806 | if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist); |
36ca4ba6 BM |
807 | if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL) |
808 | { | |
809 | *al = TLS1_AD_INTERNAL_ERROR; | |
810 | return 0; | |
811 | } | |
812 | s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length; | |
813 | memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length); | |
814 | #if 0 | |
815 | fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length); | |
816 | sdata = s->session->tlsext_ecpointformatlist; | |
817 | for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++) | |
818 | fprintf(stderr,"%i ",*(sdata++)); | |
819 | fprintf(stderr,"\n"); | |
33273721 BM |
820 | #endif |
821 | } | |
8025e251 DSH |
822 | else if (type == TLSEXT_TYPE_elliptic_curves && |
823 | s->version != DTLS1_VERSION) | |
33273721 BM |
824 | { |
825 | unsigned char *sdata = data; | |
826 | int ellipticcurvelist_length = (*(sdata++) << 8); | |
827 | ellipticcurvelist_length += (*(sdata++)); | |
828 | ||
829 | if (ellipticcurvelist_length != size - 2) | |
830 | { | |
831 | *al = TLS1_AD_DECODE_ERROR; | |
832 | return 0; | |
833 | } | |
834 | s->session->tlsext_ellipticcurvelist_length = 0; | |
835 | if (s->session->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->session->tlsext_ellipticcurvelist); | |
836 | if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL) | |
837 | { | |
838 | *al = TLS1_AD_INTERNAL_ERROR; | |
839 | return 0; | |
840 | } | |
841 | s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length; | |
842 | memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length); | |
843 | #if 0 | |
844 | fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length); | |
845 | sdata = s->session->tlsext_ellipticcurvelist; | |
846 | for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++) | |
847 | fprintf(stderr,"%i ",*(sdata++)); | |
848 | fprintf(stderr,"\n"); | |
36ca4ba6 BM |
849 | #endif |
850 | } | |
c6a27f01 | 851 | #endif /* OPENSSL_NO_EC */ |
761772d7 | 852 | #ifdef TLSEXT_TYPE_opaque_prf_input |
8025e251 DSH |
853 | else if (type == TLSEXT_TYPE_opaque_prf_input && |
854 | s->version != DTLS1_VERSION) | |
761772d7 BM |
855 | { |
856 | unsigned char *sdata = data; | |
857 | ||
858 | if (size < 2) | |
859 | { | |
860 | *al = SSL_AD_DECODE_ERROR; | |
861 | return 0; | |
862 | } | |
863 | n2s(sdata, s->s3->client_opaque_prf_input_len); | |
864 | if (s->s3->client_opaque_prf_input_len != size - 2) | |
865 | { | |
866 | *al = SSL_AD_DECODE_ERROR; | |
867 | return 0; | |
868 | } | |
869 | ||
870 | if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */ | |
871 | OPENSSL_free(s->s3->client_opaque_prf_input); | |
02c27b11 BM |
872 | if (s->s3->client_opaque_prf_input_len == 0) |
873 | s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */ | |
874 | else | |
875 | s->s3->client_opaque_prf_input = BUF_memdup(sdata, s->s3->client_opaque_prf_input_len); | |
761772d7 BM |
876 | if (s->s3->client_opaque_prf_input == NULL) |
877 | { | |
878 | *al = TLS1_AD_INTERNAL_ERROR; | |
879 | return 0; | |
880 | } | |
881 | } | |
882 | #endif | |
12bf56c0 DSH |
883 | else if (type == TLSEXT_TYPE_session_ticket) |
884 | { | |
885 | if (s->tls_session_ticket_ext_cb && | |
886 | !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg)) | |
887 | { | |
888 | *al = TLS1_AD_INTERNAL_ERROR; | |
889 | return 0; | |
890 | } | |
891 | } | |
860c3dd1 DSH |
892 | else if (type == TLSEXT_TYPE_renegotiate) |
893 | { | |
894 | if(!ssl_parse_clienthello_renegotiate_ext(s, data, size, al)) | |
895 | return 0; | |
896 | renegotiate_seen = 1; | |
897 | } | |
8025e251 DSH |
898 | else if (type == TLSEXT_TYPE_status_request && |
899 | s->version != DTLS1_VERSION && s->ctx->tlsext_status_cb) | |
67c8e7f4 DSH |
900 | { |
901 | ||
902 | if (size < 5) | |
903 | { | |
904 | *al = SSL_AD_DECODE_ERROR; | |
905 | return 0; | |
906 | } | |
907 | ||
908 | s->tlsext_status_type = *data++; | |
909 | size--; | |
910 | if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp) | |
911 | { | |
912 | const unsigned char *sdata; | |
913 | int dsize; | |
914 | /* Read in responder_id_list */ | |
915 | n2s(data,dsize); | |
916 | size -= 2; | |
917 | if (dsize > size ) | |
918 | { | |
919 | *al = SSL_AD_DECODE_ERROR; | |
920 | return 0; | |
921 | } | |
922 | while (dsize > 0) | |
923 | { | |
924 | OCSP_RESPID *id; | |
925 | int idsize; | |
926 | if (dsize < 4) | |
927 | { | |
928 | *al = SSL_AD_DECODE_ERROR; | |
929 | return 0; | |
930 | } | |
931 | n2s(data, idsize); | |
932 | dsize -= 2 + idsize; | |
933 | if (dsize < 0) | |
934 | { | |
935 | *al = SSL_AD_DECODE_ERROR; | |
936 | return 0; | |
937 | } | |
938 | sdata = data; | |
939 | data += idsize; | |
940 | id = d2i_OCSP_RESPID(NULL, | |
941 | &sdata, idsize); | |
942 | if (!id) | |
943 | { | |
944 | *al = SSL_AD_DECODE_ERROR; | |
945 | return 0; | |
946 | } | |
947 | if (data != sdata) | |
948 | { | |
949 | OCSP_RESPID_free(id); | |
950 | *al = SSL_AD_DECODE_ERROR; | |
951 | return 0; | |
952 | } | |
953 | if (!s->tlsext_ocsp_ids | |
954 | && !(s->tlsext_ocsp_ids = | |
955 | sk_OCSP_RESPID_new_null())) | |
956 | { | |
957 | OCSP_RESPID_free(id); | |
958 | *al = SSL_AD_INTERNAL_ERROR; | |
959 | return 0; | |
960 | } | |
961 | if (!sk_OCSP_RESPID_push( | |
962 | s->tlsext_ocsp_ids, id)) | |
963 | { | |
964 | OCSP_RESPID_free(id); | |
965 | *al = SSL_AD_INTERNAL_ERROR; | |
966 | return 0; | |
967 | } | |
968 | } | |
969 | ||
970 | /* Read in request_extensions */ | |
971 | n2s(data,dsize); | |
972 | size -= 2; | |
973 | if (dsize > size) | |
974 | { | |
975 | *al = SSL_AD_DECODE_ERROR; | |
976 | return 0; | |
977 | } | |
978 | sdata = data; | |
979 | if (dsize > 0) | |
980 | { | |
981 | s->tlsext_ocsp_exts = | |
982 | d2i_X509_EXTENSIONS(NULL, | |
983 | &sdata, dsize); | |
984 | if (!s->tlsext_ocsp_exts | |
985 | || (data + dsize != sdata)) | |
986 | { | |
987 | *al = SSL_AD_DECODE_ERROR; | |
988 | return 0; | |
989 | } | |
990 | } | |
991 | } | |
992 | /* We don't know what to do with any other type | |
993 | * so ignore it. | |
994 | */ | |
995 | else | |
996 | s->tlsext_status_type = -1; | |
997 | } | |
bf48836c | 998 | #ifndef OPENSSL_NO_NEXTPROTONEG |
ee2ffc27 BL |
999 | else if (type == TLSEXT_TYPE_next_proto_neg && |
1000 | s->s3->tmp.finish_md_len == 0) | |
1001 | { | |
1002 | /* We shouldn't accept this extension on a | |
1003 | * renegotiation. | |
1004 | * | |
1005 | * s->new_session will be set on renegotiation, but we | |
1006 | * probably shouldn't rely that it couldn't be set on | |
1007 | * the initial renegotation too in certain cases (when | |
1008 | * there's some other reason to disallow resuming an | |
1009 | * earlier session -- the current code won't be doing | |
1010 | * anything like that, but this might change). | |
1011 | ||
1012 | * A valid sign that there's been a previous handshake | |
1013 | * in this connection is if s->s3->tmp.finish_md_len > | |
1014 | * 0. (We are talking about a check that will happen | |
1015 | * in the Hello protocol round, well before a new | |
1016 | * Finished message could have been computed.) */ | |
1017 | s->s3->next_proto_neg_seen = 1; | |
1018 | } | |
1019 | #endif | |
761772d7 | 1020 | |
6434abbf DSH |
1021 | /* session ticket processed earlier */ |
1022 | data+=size; | |
f1fd4544 | 1023 | } |
6434abbf | 1024 | |
f1fd4544 | 1025 | *p = data; |
c27c9cb4 DSH |
1026 | |
1027 | ri_check: | |
1028 | ||
1029 | /* Need RI if renegotiating */ | |
1030 | ||
bdd53508 | 1031 | if (!renegotiate_seen && s->renegotiate && |
c27c9cb4 DSH |
1032 | !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) |
1033 | { | |
fbed9f81 | 1034 | *al = SSL_AD_HANDSHAKE_FAILURE; |
c27c9cb4 DSH |
1035 | SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT, |
1036 | SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED); | |
1037 | return 0; | |
1038 | } | |
1039 | ||
f1fd4544 | 1040 | return 1; |
52b8dad8 | 1041 | } |
f1fd4544 | 1042 | |
bf48836c | 1043 | #ifndef OPENSSL_NO_NEXTPROTONEG |
ee2ffc27 BL |
1044 | /* ssl_next_proto_validate validates a Next Protocol Negotiation block. No |
1045 | * elements of zero length are allowed and the set of elements must exactly fill | |
1046 | * the length of the block. */ | |
bf48836c | 1047 | static int ssl_next_proto_validate(unsigned char *d, unsigned len) |
ee2ffc27 BL |
1048 | { |
1049 | unsigned int off = 0; | |
1050 | ||
1051 | while (off < len) | |
1052 | { | |
1053 | if (d[off] == 0) | |
1054 | return 0; | |
1055 | off += d[off]; | |
1056 | off++; | |
1057 | } | |
1058 | ||
1059 | return off == len; | |
1060 | } | |
1061 | #endif | |
1062 | ||
f1fd4544 BM |
1063 | int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al) |
1064 | { | |
c8bbd98a | 1065 | unsigned short length; |
ed3883d2 BM |
1066 | unsigned short type; |
1067 | unsigned short size; | |
ed3883d2 | 1068 | unsigned char *data = *p; |
ed3883d2 | 1069 | int tlsext_servername = 0; |
860c3dd1 | 1070 | int renegotiate_seen = 0; |
ed3883d2 BM |
1071 | |
1072 | if (data >= (d+n-2)) | |
c27c9cb4 | 1073 | goto ri_check; |
ed3883d2 | 1074 | |
c8bbd98a BL |
1075 | n2s(data,length); |
1076 | if (data+length != d+n) | |
1077 | { | |
1078 | *al = SSL_AD_DECODE_ERROR; | |
1079 | return 0; | |
1080 | } | |
ed3883d2 | 1081 | |
f1fd4544 BM |
1082 | while(data <= (d+n-4)) |
1083 | { | |
ed3883d2 BM |
1084 | n2s(data,type); |
1085 | n2s(data,size); | |
1086 | ||
1087 | if (data+size > (d+n)) | |
c27c9cb4 | 1088 | goto ri_check; |
f1fd4544 | 1089 | |
6434abbf DSH |
1090 | if (s->tlsext_debug_cb) |
1091 | s->tlsext_debug_cb(s, 1, type, data, size, | |
1092 | s->tlsext_debug_arg); | |
1093 | ||
f1fd4544 BM |
1094 | if (type == TLSEXT_TYPE_server_name) |
1095 | { | |
1096 | if (s->tlsext_hostname == NULL || size > 0) | |
1097 | { | |
1098 | *al = TLS1_AD_UNRECOGNIZED_NAME; | |
1099 | return 0; | |
1100 | } | |
ed3883d2 | 1101 | tlsext_servername = 1; |
f1fd4544 | 1102 | } |
ed3883d2 | 1103 | |
36ca4ba6 | 1104 | #ifndef OPENSSL_NO_EC |
8025e251 DSH |
1105 | else if (type == TLSEXT_TYPE_ec_point_formats && |
1106 | s->version != DTLS1_VERSION) | |
36ca4ba6 BM |
1107 | { |
1108 | unsigned char *sdata = data; | |
1109 | int ecpointformatlist_length = *(sdata++); | |
36ca4ba6 BM |
1110 | |
1111 | if (ecpointformatlist_length != size - 1) | |
1112 | { | |
1113 | *al = TLS1_AD_DECODE_ERROR; | |
1114 | return 0; | |
1115 | } | |
1116 | s->session->tlsext_ecpointformatlist_length = 0; | |
b6acb8d0 | 1117 | if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist); |
36ca4ba6 BM |
1118 | if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL) |
1119 | { | |
1120 | *al = TLS1_AD_INTERNAL_ERROR; | |
1121 | return 0; | |
1122 | } | |
1123 | s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length; | |
1124 | memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length); | |
1125 | #if 0 | |
1126 | fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist "); | |
1127 | sdata = s->session->tlsext_ecpointformatlist; | |
1128 | for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++) | |
1129 | fprintf(stderr,"%i ",*(sdata++)); | |
1130 | fprintf(stderr,"\n"); | |
1131 | #endif | |
1132 | } | |
c6a27f01 | 1133 | #endif /* OPENSSL_NO_EC */ |
6434abbf DSH |
1134 | |
1135 | else if (type == TLSEXT_TYPE_session_ticket) | |
1136 | { | |
12bf56c0 DSH |
1137 | if (s->tls_session_ticket_ext_cb && |
1138 | !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg)) | |
1139 | { | |
1140 | *al = TLS1_AD_INTERNAL_ERROR; | |
1141 | return 0; | |
1142 | } | |
6434abbf DSH |
1143 | if ((SSL_get_options(s) & SSL_OP_NO_TICKET) |
1144 | || (size > 0)) | |
1145 | { | |
1146 | *al = TLS1_AD_UNSUPPORTED_EXTENSION; | |
1147 | return 0; | |
1148 | } | |
1149 | s->tlsext_ticket_expected = 1; | |
1150 | } | |
761772d7 | 1151 | #ifdef TLSEXT_TYPE_opaque_prf_input |
8025e251 DSH |
1152 | else if (type == TLSEXT_TYPE_opaque_prf_input && |
1153 | s->version != DTLS1_VERSION) | |
761772d7 BM |
1154 | { |
1155 | unsigned char *sdata = data; | |
1156 | ||
1157 | if (size < 2) | |
1158 | { | |
1159 | *al = SSL_AD_DECODE_ERROR; | |
1160 | return 0; | |
1161 | } | |
1162 | n2s(sdata, s->s3->server_opaque_prf_input_len); | |
1163 | if (s->s3->server_opaque_prf_input_len != size - 2) | |
1164 | { | |
1165 | *al = SSL_AD_DECODE_ERROR; | |
1166 | return 0; | |
1167 | } | |
1168 | ||
1169 | if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */ | |
1170 | OPENSSL_free(s->s3->server_opaque_prf_input); | |
02c27b11 BM |
1171 | if (s->s3->server_opaque_prf_input_len == 0) |
1172 | s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */ | |
1173 | else | |
1174 | s->s3->server_opaque_prf_input = BUF_memdup(sdata, s->s3->server_opaque_prf_input_len); | |
761772d7 BM |
1175 | |
1176 | if (s->s3->server_opaque_prf_input == NULL) | |
1177 | { | |
1178 | *al = TLS1_AD_INTERNAL_ERROR; | |
1179 | return 0; | |
1180 | } | |
1181 | } | |
1182 | #endif | |
8025e251 DSH |
1183 | else if (type == TLSEXT_TYPE_status_request && |
1184 | s->version != DTLS1_VERSION) | |
67c8e7f4 DSH |
1185 | { |
1186 | /* MUST be empty and only sent if we've requested | |
1187 | * a status request message. | |
1188 | */ | |
1189 | if ((s->tlsext_status_type == -1) || (size > 0)) | |
1190 | { | |
1191 | *al = TLS1_AD_UNSUPPORTED_EXTENSION; | |
1192 | return 0; | |
1193 | } | |
1194 | /* Set flag to expect CertificateStatus message */ | |
1195 | s->tlsext_status_expected = 1; | |
1196 | } | |
bf48836c | 1197 | #ifndef OPENSSL_NO_NEXTPROTONEG |
ee2ffc27 BL |
1198 | else if (type == TLSEXT_TYPE_next_proto_neg) |
1199 | { | |
1200 | unsigned char *selected; | |
1201 | unsigned char selected_len; | |
1202 | ||
1203 | /* We must have requested it. */ | |
1204 | if ((s->ctx->next_proto_select_cb == NULL)) | |
1205 | { | |
1206 | *al = TLS1_AD_UNSUPPORTED_EXTENSION; | |
1207 | return 0; | |
1208 | } | |
1209 | /* The data must be valid */ | |
1210 | if (!ssl_next_proto_validate(data, size)) | |
1211 | { | |
1212 | *al = TLS1_AD_DECODE_ERROR; | |
1213 | return 0; | |
1214 | } | |
1215 | if (s->ctx->next_proto_select_cb(s, &selected, &selected_len, data, size, s->ctx->next_proto_select_cb_arg) != SSL_TLSEXT_ERR_OK) | |
1216 | { | |
1217 | *al = TLS1_AD_INTERNAL_ERROR; | |
1218 | return 0; | |
1219 | } | |
1220 | s->next_proto_negotiated = OPENSSL_malloc(selected_len); | |
1221 | if (!s->next_proto_negotiated) | |
1222 | { | |
1223 | *al = TLS1_AD_INTERNAL_ERROR; | |
1224 | return 0; | |
1225 | } | |
1226 | memcpy(s->next_proto_negotiated, selected, selected_len); | |
1227 | s->next_proto_negotiated_len = selected_len; | |
1228 | } | |
1229 | #endif | |
860c3dd1 DSH |
1230 | else if (type == TLSEXT_TYPE_renegotiate) |
1231 | { | |
1232 | if(!ssl_parse_serverhello_renegotiate_ext(s, data, size, al)) | |
1233 | return 0; | |
1234 | renegotiate_seen = 1; | |
1235 | } | |
ed3883d2 | 1236 | data+=size; |
f1fd4544 | 1237 | } |
ed3883d2 BM |
1238 | |
1239 | if (data != d+n) | |
f1fd4544 BM |
1240 | { |
1241 | *al = SSL_AD_DECODE_ERROR; | |
1242 | return 0; | |
1243 | } | |
ed3883d2 | 1244 | |
f1fd4544 BM |
1245 | if (!s->hit && tlsext_servername == 1) |
1246 | { | |
1247 | if (s->tlsext_hostname) | |
1248 | { | |
1249 | if (s->session->tlsext_hostname == NULL) | |
1250 | { | |
ed3883d2 BM |
1251 | s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname); |
1252 | if (!s->session->tlsext_hostname) | |
f1fd4544 BM |
1253 | { |
1254 | *al = SSL_AD_UNRECOGNIZED_NAME; | |
1255 | return 0; | |
1256 | } | |
1257 | } | |
1258 | else | |
1259 | { | |
1260 | *al = SSL_AD_DECODE_ERROR; | |
1261 | return 0; | |
1262 | } | |
ed3883d2 | 1263 | } |
f1fd4544 | 1264 | } |
ed3883d2 | 1265 | |
f1fd4544 | 1266 | *p = data; |
c27c9cb4 DSH |
1267 | |
1268 | ri_check: | |
1269 | ||
1270 | /* Determine if we need to see RI. Strictly speaking if we want to | |
1271 | * avoid an attack we should *always* see RI even on initial server | |
1272 | * hello because the client doesn't see any renegotiation during an | |
1273 | * attack. However this would mean we could not connect to any server | |
1274 | * which doesn't support RI so for the immediate future tolerate RI | |
1275 | * absence on initial connect only. | |
1276 | */ | |
c2c49969 DSH |
1277 | if (!renegotiate_seen |
1278 | && !(s->options & SSL_OP_LEGACY_SERVER_CONNECT) | |
ef51b4b9 | 1279 | && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) |
c27c9cb4 | 1280 | { |
fbed9f81 | 1281 | *al = SSL_AD_HANDSHAKE_FAILURE; |
c27c9cb4 DSH |
1282 | SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT, |
1283 | SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED); | |
1284 | return 0; | |
1285 | } | |
1286 | ||
f1fd4544 | 1287 | return 1; |
52b8dad8 | 1288 | } |
ed3883d2 | 1289 | |
b2172f4f | 1290 | |
36ca4ba6 BM |
1291 | int ssl_prepare_clienthello_tlsext(SSL *s) |
1292 | { | |
1293 | #ifndef OPENSSL_NO_EC | |
33273721 BM |
1294 | /* If we are client and using an elliptic curve cryptography cipher suite, send the point formats |
1295 | * and elliptic curves we support. | |
36ca4ba6 BM |
1296 | */ |
1297 | int using_ecc = 0; | |
1298 | int i; | |
33273721 | 1299 | unsigned char *j; |
52b8dad8 | 1300 | unsigned long alg_k, alg_a; |
36ca4ba6 | 1301 | STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s); |
52b8dad8 | 1302 | |
36ca4ba6 BM |
1303 | for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++) |
1304 | { | |
52b8dad8 BM |
1305 | SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i); |
1306 | ||
1307 | alg_k = c->algorithm_mkey; | |
1308 | alg_a = c->algorithm_auth; | |
1309 | if ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe) || (alg_a & SSL_aECDSA))) | |
36ca4ba6 BM |
1310 | { |
1311 | using_ecc = 1; | |
1312 | break; | |
1313 | } | |
36ca4ba6 BM |
1314 | } |
1315 | using_ecc = using_ecc && (s->version == TLS1_VERSION); | |
1316 | if (using_ecc) | |
1317 | { | |
b6acb8d0 BM |
1318 | if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist); |
1319 | if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL) | |
36ca4ba6 | 1320 | { |
a291745e | 1321 | SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE); |
36ca4ba6 BM |
1322 | return -1; |
1323 | } | |
b6acb8d0 BM |
1324 | s->tlsext_ecpointformatlist_length = 3; |
1325 | s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed; | |
1326 | s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime; | |
1327 | s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2; | |
b2172f4f | 1328 | |
33273721 BM |
1329 | /* we support all named elliptic curves in draft-ietf-tls-ecc-12 */ |
1330 | if (s->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->tlsext_ellipticcurvelist); | |
b2172f4f BM |
1331 | s->tlsext_ellipticcurvelist_length = sizeof(nid_list)/sizeof(nid_list[0]) * 2; |
1332 | if ((s->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL) | |
33273721 | 1333 | { |
b2172f4f | 1334 | s->tlsext_ellipticcurvelist_length = 0; |
a291745e | 1335 | SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE); |
33273721 BM |
1336 | return -1; |
1337 | } | |
1e26a8ba GT |
1338 | for (i = 1, j = s->tlsext_ellipticcurvelist; (unsigned int)i <= |
1339 | sizeof(nid_list)/sizeof(nid_list[0]); i++) | |
b2172f4f | 1340 | s2n(i,j); |
36ca4ba6 BM |
1341 | } |
1342 | #endif /* OPENSSL_NO_EC */ | |
761772d7 BM |
1343 | |
1344 | #ifdef TLSEXT_TYPE_opaque_prf_input | |
1345 | { | |
1346 | int r = 1; | |
1347 | ||
1348 | if (s->ctx->tlsext_opaque_prf_input_callback != 0) | |
1349 | { | |
1350 | r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg); | |
1351 | if (!r) | |
1352 | return -1; | |
1353 | } | |
1354 | ||
1355 | if (s->tlsext_opaque_prf_input != NULL) | |
1356 | { | |
1357 | if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */ | |
1358 | OPENSSL_free(s->s3->client_opaque_prf_input); | |
1359 | ||
02c27b11 BM |
1360 | if (s->tlsext_opaque_prf_input_len == 0) |
1361 | s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */ | |
1362 | else | |
1363 | s->s3->client_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len); | |
761772d7 BM |
1364 | if (s->s3->client_opaque_prf_input == NULL) |
1365 | { | |
1366 | SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE); | |
1367 | return -1; | |
1368 | } | |
1369 | s->s3->client_opaque_prf_input_len = s->tlsext_opaque_prf_input_len; | |
1370 | } | |
1371 | ||
1372 | if (r == 2) | |
1373 | /* at callback's request, insist on receiving an appropriate server opaque PRF input */ | |
1374 | s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len; | |
1375 | } | |
1376 | #endif | |
1377 | ||
36ca4ba6 | 1378 | return 1; |
52b8dad8 | 1379 | } |
36ca4ba6 BM |
1380 | |
1381 | int ssl_prepare_serverhello_tlsext(SSL *s) | |
1382 | { | |
1383 | #ifndef OPENSSL_NO_EC | |
b6acb8d0 | 1384 | /* If we are server and using an ECC cipher suite, send the point formats we support |
33273721 BM |
1385 | * if the client sent us an ECPointsFormat extension. Note that the server is not |
1386 | * supposed to send an EllipticCurves extension. | |
36ca4ba6 | 1387 | */ |
36ca4ba6 | 1388 | |
52b8dad8 BM |
1389 | unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
1390 | unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
1391 | int using_ecc = (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA); | |
1392 | using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL); | |
1393 | ||
36ca4ba6 BM |
1394 | if (using_ecc) |
1395 | { | |
b6acb8d0 BM |
1396 | if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist); |
1397 | if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL) | |
36ca4ba6 | 1398 | { |
a291745e | 1399 | SSLerr(SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE); |
36ca4ba6 BM |
1400 | return -1; |
1401 | } | |
b6acb8d0 BM |
1402 | s->tlsext_ecpointformatlist_length = 3; |
1403 | s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed; | |
1404 | s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime; | |
1405 | s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2; | |
36ca4ba6 BM |
1406 | } |
1407 | #endif /* OPENSSL_NO_EC */ | |
761772d7 | 1408 | |
36ca4ba6 | 1409 | return 1; |
52b8dad8 | 1410 | } |
36ca4ba6 BM |
1411 | |
1412 | int ssl_check_clienthello_tlsext(SSL *s) | |
f1fd4544 | 1413 | { |
241520e6 | 1414 | int ret=SSL_TLSEXT_ERR_NOACK; |
36ca4ba6 BM |
1415 | int al = SSL_AD_UNRECOGNIZED_NAME; |
1416 | ||
1417 | #ifndef OPENSSL_NO_EC | |
33273721 BM |
1418 | /* The handling of the ECPointFormats extension is done elsewhere, namely in |
1419 | * ssl3_choose_cipher in s3_lib.c. | |
1420 | */ | |
1421 | /* The handling of the EllipticCurves extension is done elsewhere, namely in | |
1422 | * ssl3_choose_cipher in s3_lib.c. | |
36ca4ba6 BM |
1423 | */ |
1424 | #endif | |
1425 | ||
1426 | if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0) | |
1427 | ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg); | |
1428 | else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0) | |
1429 | ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg); | |
1430 | ||
67c8e7f4 DSH |
1431 | /* If status request then ask callback what to do. |
1432 | * Note: this must be called after servername callbacks in case | |
1433 | * the certificate has changed. | |
1434 | */ | |
2bd45dc9 | 1435 | if ((s->tlsext_status_type != -1) && s->ctx && s->ctx->tlsext_status_cb) |
67c8e7f4 DSH |
1436 | { |
1437 | int r; | |
1438 | r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); | |
1439 | switch (r) | |
1440 | { | |
1441 | /* We don't want to send a status request response */ | |
1442 | case SSL_TLSEXT_ERR_NOACK: | |
1443 | s->tlsext_status_expected = 0; | |
1444 | break; | |
1445 | /* status request response should be sent */ | |
1446 | case SSL_TLSEXT_ERR_OK: | |
1447 | if (s->tlsext_ocsp_resp) | |
1448 | s->tlsext_status_expected = 1; | |
1449 | else | |
1450 | s->tlsext_status_expected = 0; | |
1451 | break; | |
1452 | /* something bad happened */ | |
1453 | case SSL_TLSEXT_ERR_ALERT_FATAL: | |
1454 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
1455 | al = SSL_AD_INTERNAL_ERROR; | |
1456 | goto err; | |
1457 | } | |
1458 | } | |
1459 | else | |
1460 | s->tlsext_status_expected = 0; | |
761772d7 BM |
1461 | |
1462 | #ifdef TLSEXT_TYPE_opaque_prf_input | |
1463 | { | |
1464 | /* This sort of belongs into ssl_prepare_serverhello_tlsext(), | |
1465 | * but we might be sending an alert in response to the client hello, | |
1466 | * so this has to happen here in ssl_check_clienthello_tlsext(). */ | |
1467 | ||
1468 | int r = 1; | |
1469 | ||
1470 | if (s->ctx->tlsext_opaque_prf_input_callback != 0) | |
1471 | { | |
1472 | r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg); | |
1473 | if (!r) | |
1474 | { | |
1475 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
1476 | al = SSL_AD_INTERNAL_ERROR; | |
1477 | goto err; | |
1478 | } | |
1479 | } | |
1480 | ||
1481 | if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */ | |
1482 | OPENSSL_free(s->s3->server_opaque_prf_input); | |
1483 | s->s3->server_opaque_prf_input = NULL; | |
1484 | ||
1485 | if (s->tlsext_opaque_prf_input != NULL) | |
1486 | { | |
1487 | if (s->s3->client_opaque_prf_input != NULL && | |
1488 | s->s3->client_opaque_prf_input_len == s->tlsext_opaque_prf_input_len) | |
1489 | { | |
1490 | /* can only use this extension if we have a server opaque PRF input | |
1491 | * of the same length as the client opaque PRF input! */ | |
1492 | ||
02c27b11 BM |
1493 | if (s->tlsext_opaque_prf_input_len == 0) |
1494 | s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */ | |
1495 | else | |
1496 | s->s3->server_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len); | |
761772d7 BM |
1497 | if (s->s3->server_opaque_prf_input == NULL) |
1498 | { | |
1499 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
1500 | al = SSL_AD_INTERNAL_ERROR; | |
1501 | goto err; | |
1502 | } | |
1503 | s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len; | |
1504 | } | |
1505 | } | |
1506 | ||
1507 | if (r == 2 && s->s3->server_opaque_prf_input == NULL) | |
1508 | { | |
1509 | /* The callback wants to enforce use of the extension, | |
1510 | * but we can't do that with the client opaque PRF input; | |
1511 | * abort the handshake. | |
1512 | */ | |
1513 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
1514 | al = SSL_AD_HANDSHAKE_FAILURE; | |
1515 | } | |
1516 | } | |
761772d7 | 1517 | |
67c8e7f4 | 1518 | #endif |
761772d7 | 1519 | err: |
52b8dad8 BM |
1520 | switch (ret) |
1521 | { | |
36ca4ba6 BM |
1522 | case SSL_TLSEXT_ERR_ALERT_FATAL: |
1523 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1524 | return -1; | |
1525 | ||
1526 | case SSL_TLSEXT_ERR_ALERT_WARNING: | |
1527 | ssl3_send_alert(s,SSL3_AL_WARNING,al); | |
1528 | return 1; | |
1529 | ||
1530 | case SSL_TLSEXT_ERR_NOACK: | |
1531 | s->servername_done=0; | |
1532 | default: | |
1533 | return 1; | |
52b8dad8 | 1534 | } |
36ca4ba6 | 1535 | } |
f1fd4544 | 1536 | |
36ca4ba6 BM |
1537 | int ssl_check_serverhello_tlsext(SSL *s) |
1538 | { | |
1539 | int ret=SSL_TLSEXT_ERR_NOACK; | |
58ece833 | 1540 | int al = SSL_AD_UNRECOGNIZED_NAME; |
241520e6 | 1541 | |
36ca4ba6 BM |
1542 | #ifndef OPENSSL_NO_EC |
1543 | /* If we are client and using an elliptic curve cryptography cipher suite, then server | |
1544 | * must return a an EC point formats lists containing uncompressed. | |
1545 | */ | |
52b8dad8 BM |
1546 | unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
1547 | unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
36ca4ba6 | 1548 | if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) && |
52b8dad8 | 1549 | ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA))) |
36ca4ba6 BM |
1550 | { |
1551 | /* we are using an ECC cipher */ | |
90bdfd97 | 1552 | size_t i; |
36ca4ba6 BM |
1553 | unsigned char *list; |
1554 | int found_uncompressed = 0; | |
a4ff3925 | 1555 | if ((s->session->tlsext_ecpointformatlist == NULL) || (s->session->tlsext_ecpointformatlist_length == 0)) |
36ca4ba6 | 1556 | { |
a291745e | 1557 | SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST); |
36ca4ba6 BM |
1558 | return -1; |
1559 | } | |
b9865f11 | 1560 | list = s->session->tlsext_ecpointformatlist; |
36ca4ba6 BM |
1561 | for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++) |
1562 | { | |
1563 | if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed) | |
1564 | { | |
1565 | found_uncompressed = 1; | |
1566 | break; | |
1567 | } | |
1568 | } | |
1569 | if (!found_uncompressed) | |
1570 | { | |
a291745e | 1571 | SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST); |
36ca4ba6 BM |
1572 | return -1; |
1573 | } | |
1574 | } | |
1575 | ret = SSL_TLSEXT_ERR_OK; | |
1576 | #endif /* OPENSSL_NO_EC */ | |
1577 | ||
241520e6 | 1578 | if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0) |
58ece833 | 1579 | ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg); |
241520e6 | 1580 | else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0) |
58ece833 | 1581 | ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg); |
241520e6 | 1582 | |
761772d7 BM |
1583 | #ifdef TLSEXT_TYPE_opaque_prf_input |
1584 | if (s->s3->server_opaque_prf_input_len > 0) | |
1585 | { | |
1586 | /* This case may indicate that we, as a client, want to insist on using opaque PRF inputs. | |
1587 | * So first verify that we really have a value from the server too. */ | |
1588 | ||
1589 | if (s->s3->server_opaque_prf_input == NULL) | |
1590 | { | |
1591 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
1592 | al = SSL_AD_HANDSHAKE_FAILURE; | |
1593 | } | |
1594 | ||
1595 | /* Anytime the server *has* sent an opaque PRF input, we need to check | |
1596 | * that we have a client opaque PRF input of the same size. */ | |
1597 | if (s->s3->client_opaque_prf_input == NULL || | |
1598 | s->s3->client_opaque_prf_input_len != s->s3->server_opaque_prf_input_len) | |
1599 | { | |
1600 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
1601 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1602 | } | |
1603 | } | |
1604 | #endif | |
1605 | ||
04e2ab2c DSH |
1606 | /* If we've requested certificate status and we wont get one |
1607 | * tell the callback | |
1608 | */ | |
1609 | if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected) | |
121f9e74 | 1610 | && s->ctx && s->ctx->tlsext_status_cb) |
04e2ab2c DSH |
1611 | { |
1612 | int r; | |
1613 | /* Set resp to NULL, resplen to -1 so callback knows | |
1614 | * there is no response. | |
1615 | */ | |
1616 | if (s->tlsext_ocsp_resp) | |
1617 | { | |
1618 | OPENSSL_free(s->tlsext_ocsp_resp); | |
1619 | s->tlsext_ocsp_resp = NULL; | |
1620 | } | |
1621 | s->tlsext_ocsp_resplen = -1; | |
1622 | r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); | |
1623 | if (r == 0) | |
1624 | { | |
1625 | al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; | |
1626 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
1627 | } | |
1628 | if (r < 0) | |
1629 | { | |
1630 | al = SSL_AD_INTERNAL_ERROR; | |
1631 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
1632 | } | |
1633 | } | |
1634 | ||
52b8dad8 BM |
1635 | switch (ret) |
1636 | { | |
58ece833 BM |
1637 | case SSL_TLSEXT_ERR_ALERT_FATAL: |
1638 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1639 | return -1; | |
1640 | ||
1641 | case SSL_TLSEXT_ERR_ALERT_WARNING: | |
1642 | ssl3_send_alert(s,SSL3_AL_WARNING,al); | |
1643 | return 1; | |
1644 | ||
1645 | case SSL_TLSEXT_ERR_NOACK: | |
1646 | s->servername_done=0; | |
1647 | default: | |
1648 | return 1; | |
52b8dad8 | 1649 | } |
f1fd4544 | 1650 | } |
33273721 | 1651 | |
6434abbf DSH |
1652 | /* Since the server cache lookup is done early on in the processing of client |
1653 | * hello and other operations depend on the result we need to handle any TLS | |
1654 | * session ticket extension at the same time. | |
1655 | */ | |
1656 | ||
1657 | int tls1_process_ticket(SSL *s, unsigned char *session_id, int len, | |
1658 | const unsigned char *limit, SSL_SESSION **ret) | |
1659 | { | |
1660 | /* Point after session ID in client hello */ | |
1661 | const unsigned char *p = session_id + len; | |
1662 | unsigned short i; | |
e8da6a1d DSH |
1663 | |
1664 | /* If tickets disabled behave as if no ticket present | |
1665 | * to permit stateful resumption. | |
1666 | */ | |
1667 | if (SSL_get_options(s) & SSL_OP_NO_TICKET) | |
1668 | return 1; | |
1669 | ||
6434abbf DSH |
1670 | if ((s->version <= SSL3_VERSION) || !limit) |
1671 | return 1; | |
1672 | if (p >= limit) | |
1673 | return -1; | |
07a9d1a2 DSH |
1674 | /* Skip past DTLS cookie */ |
1675 | if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER) | |
1676 | { | |
1677 | i = *(p++); | |
1678 | p+= i; | |
1679 | if (p >= limit) | |
1680 | return -1; | |
1681 | } | |
6434abbf DSH |
1682 | /* Skip past cipher list */ |
1683 | n2s(p, i); | |
1684 | p+= i; | |
1685 | if (p >= limit) | |
1686 | return -1; | |
1687 | /* Skip past compression algorithm list */ | |
1688 | i = *(p++); | |
1689 | p += i; | |
1690 | if (p > limit) | |
1691 | return -1; | |
1692 | /* Now at start of extensions */ | |
1693 | if ((p + 2) >= limit) | |
1694 | return 1; | |
1695 | n2s(p, i); | |
1696 | while ((p + 4) <= limit) | |
1697 | { | |
1698 | unsigned short type, size; | |
1699 | n2s(p, type); | |
1700 | n2s(p, size); | |
1701 | if (p + size > limit) | |
1702 | return 1; | |
1703 | if (type == TLSEXT_TYPE_session_ticket) | |
1704 | { | |
1705 | /* If tickets disabled indicate cache miss which will | |
1706 | * trigger a full handshake | |
1707 | */ | |
1708 | if (SSL_get_options(s) & SSL_OP_NO_TICKET) | |
e8da6a1d DSH |
1709 | return 1; |
1710 | /* If zero length note client will accept a ticket | |
6434abbf DSH |
1711 | * and indicate cache miss to trigger full handshake |
1712 | */ | |
1713 | if (size == 0) | |
1714 | { | |
1715 | s->tlsext_ticket_expected = 1; | |
1716 | return 0; /* Cache miss */ | |
1717 | } | |
12bf56c0 DSH |
1718 | if (s->tls_session_secret_cb) |
1719 | { | |
1720 | /* Indicate cache miss here and instead of | |
1721 | * generating the session from ticket now, | |
1722 | * trigger abbreviated handshake based on | |
1723 | * external mechanism to calculate the master | |
1724 | * secret later. */ | |
1725 | return 0; | |
1726 | } | |
6434abbf DSH |
1727 | return tls_decrypt_ticket(s, p, size, session_id, len, |
1728 | ret); | |
1729 | } | |
1730 | p += size; | |
1731 | } | |
1732 | return 1; | |
1733 | } | |
1734 | ||
1735 | static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen, | |
1736 | const unsigned char *sess_id, int sesslen, | |
1737 | SSL_SESSION **psess) | |
1738 | { | |
1739 | SSL_SESSION *sess; | |
1740 | unsigned char *sdec; | |
1741 | const unsigned char *p; | |
8a2062fe | 1742 | int slen, mlen, renew_ticket = 0; |
6434abbf DSH |
1743 | unsigned char tick_hmac[EVP_MAX_MD_SIZE]; |
1744 | HMAC_CTX hctx; | |
1745 | EVP_CIPHER_CTX ctx; | |
661dc143 | 1746 | SSL_CTX *tctx = s->initial_ctx; |
8a2062fe DSH |
1747 | /* Need at least keyname + iv + some encrypted data */ |
1748 | if (eticklen < 48) | |
1749 | goto tickerr; | |
1750 | /* Initialize session ticket encryption and HMAC contexts */ | |
1751 | HMAC_CTX_init(&hctx); | |
1752 | EVP_CIPHER_CTX_init(&ctx); | |
661dc143 | 1753 | if (tctx->tlsext_ticket_key_cb) |
8a2062fe DSH |
1754 | { |
1755 | unsigned char *nctick = (unsigned char *)etick; | |
661dc143 | 1756 | int rv = tctx->tlsext_ticket_key_cb(s, nctick, nctick + 16, |
8a2062fe DSH |
1757 | &ctx, &hctx, 0); |
1758 | if (rv < 0) | |
1759 | return -1; | |
1760 | if (rv == 0) | |
1761 | goto tickerr; | |
1762 | if (rv == 2) | |
1763 | renew_ticket = 1; | |
1764 | } | |
1765 | else | |
1766 | { | |
1767 | /* Check key name matches */ | |
661dc143 | 1768 | if (memcmp(etick, tctx->tlsext_tick_key_name, 16)) |
8a2062fe | 1769 | goto tickerr; |
661dc143 | 1770 | HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16, |
8a2062fe DSH |
1771 | tlsext_tick_md(), NULL); |
1772 | EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL, | |
661dc143 | 1773 | tctx->tlsext_tick_aes_key, etick + 16); |
8a2062fe | 1774 | } |
6434abbf DSH |
1775 | /* Attempt to process session ticket, first conduct sanity and |
1776 | * integrity checks on ticket. | |
1777 | */ | |
8a2062fe | 1778 | mlen = HMAC_size(&hctx); |
0eab41fb BL |
1779 | if (mlen < 0) |
1780 | { | |
1781 | EVP_CIPHER_CTX_cleanup(&ctx); | |
1782 | return -1; | |
1783 | } | |
6434abbf | 1784 | eticklen -= mlen; |
6434abbf | 1785 | /* Check HMAC of encrypted ticket */ |
6434abbf DSH |
1786 | HMAC_Update(&hctx, etick, eticklen); |
1787 | HMAC_Final(&hctx, tick_hmac, NULL); | |
1788 | HMAC_CTX_cleanup(&hctx); | |
1789 | if (memcmp(tick_hmac, etick + eticklen, mlen)) | |
1790 | goto tickerr; | |
6434abbf | 1791 | /* Attempt to decrypt session data */ |
6434abbf | 1792 | /* Move p after IV to start of encrypted ticket, update length */ |
8a2062fe DSH |
1793 | p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx); |
1794 | eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx); | |
6434abbf DSH |
1795 | sdec = OPENSSL_malloc(eticklen); |
1796 | if (!sdec) | |
1797 | { | |
1798 | EVP_CIPHER_CTX_cleanup(&ctx); | |
1799 | return -1; | |
1800 | } | |
1801 | EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen); | |
1802 | if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0) | |
1803 | goto tickerr; | |
6434abbf DSH |
1804 | slen += mlen; |
1805 | EVP_CIPHER_CTX_cleanup(&ctx); | |
1806 | p = sdec; | |
1807 | ||
1808 | sess = d2i_SSL_SESSION(NULL, &p, slen); | |
1809 | OPENSSL_free(sdec); | |
1810 | if (sess) | |
1811 | { | |
1812 | /* The session ID if non-empty is used by some clients to | |
1813 | * detect that the ticket has been accepted. So we copy it to | |
1814 | * the session structure. If it is empty set length to zero | |
1815 | * as required by standard. | |
1816 | */ | |
1817 | if (sesslen) | |
1818 | memcpy(sess->session_id, sess_id, sesslen); | |
1819 | sess->session_id_length = sesslen; | |
1820 | *psess = sess; | |
8a2062fe | 1821 | s->tlsext_ticket_expected = renew_ticket; |
6434abbf DSH |
1822 | return 1; |
1823 | } | |
1824 | /* If session decrypt failure indicate a cache miss and set state to | |
1825 | * send a new ticket | |
1826 | */ | |
1827 | tickerr: | |
1828 | s->tlsext_ticket_expected = 1; | |
1829 | return 0; | |
1830 | } | |
6434abbf DSH |
1831 | |
1832 | #endif |