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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> |
4817504d | 117 | #include <openssl/rand.h> |
58964a49 RE |
118 | #include "ssl_locl.h" |
119 | ||
42182852 | 120 | const char tls1_version_str[]="TLSv1" OPENSSL_VERSION_PTEXT; |
58964a49 | 121 | |
367eb1f1 | 122 | #ifndef OPENSSL_NO_TLSEXT |
6434abbf DSH |
123 | static int tls_decrypt_ticket(SSL *s, const unsigned char *tick, int ticklen, |
124 | const unsigned char *sess_id, int sesslen, | |
125 | SSL_SESSION **psess); | |
09e4e4b9 DSH |
126 | static int ssl_check_clienthello_tlsext(SSL *s); |
127 | int ssl_check_serverhello_tlsext(SSL *s); | |
367eb1f1 | 128 | #endif |
6434abbf | 129 | |
f3b656b2 | 130 | SSL3_ENC_METHOD TLSv1_enc_data={ |
58964a49 RE |
131 | tls1_enc, |
132 | tls1_mac, | |
133 | tls1_setup_key_block, | |
134 | tls1_generate_master_secret, | |
135 | tls1_change_cipher_state, | |
136 | tls1_final_finish_mac, | |
137 | TLS1_FINISH_MAC_LENGTH, | |
138 | tls1_cert_verify_mac, | |
139 | TLS_MD_CLIENT_FINISH_CONST,TLS_MD_CLIENT_FINISH_CONST_SIZE, | |
140 | TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE, | |
141 | tls1_alert_code, | |
e0af0405 | 142 | tls1_export_keying_material, |
58964a49 RE |
143 | }; |
144 | ||
f3b656b2 | 145 | long tls1_default_timeout(void) |
58964a49 RE |
146 | { |
147 | /* 2 hours, the 24 hours mentioned in the TLSv1 spec | |
148 | * is way too long for http, the cache would over fill */ | |
149 | return(60*60*2); | |
150 | } | |
151 | ||
6b691a5c | 152 | int tls1_new(SSL *s) |
58964a49 RE |
153 | { |
154 | if (!ssl3_new(s)) return(0); | |
155 | s->method->ssl_clear(s); | |
156 | return(1); | |
157 | } | |
158 | ||
6b691a5c | 159 | void tls1_free(SSL *s) |
58964a49 | 160 | { |
12bf56c0 DSH |
161 | #ifndef OPENSSL_NO_TLSEXT |
162 | if (s->tlsext_session_ticket) | |
163 | { | |
164 | OPENSSL_free(s->tlsext_session_ticket); | |
165 | } | |
166 | #endif /* OPENSSL_NO_TLSEXT */ | |
58964a49 RE |
167 | ssl3_free(s); |
168 | } | |
169 | ||
6b691a5c | 170 | void tls1_clear(SSL *s) |
58964a49 RE |
171 | { |
172 | ssl3_clear(s); | |
637f374a | 173 | s->version = s->method->version; |
58964a49 RE |
174 | } |
175 | ||
525de5d3 | 176 | #ifndef OPENSSL_NO_EC |
eda3766b | 177 | |
525de5d3 DSH |
178 | static int nid_list[] = |
179 | { | |
180 | NID_sect163k1, /* sect163k1 (1) */ | |
181 | NID_sect163r1, /* sect163r1 (2) */ | |
182 | NID_sect163r2, /* sect163r2 (3) */ | |
183 | NID_sect193r1, /* sect193r1 (4) */ | |
184 | NID_sect193r2, /* sect193r2 (5) */ | |
185 | NID_sect233k1, /* sect233k1 (6) */ | |
186 | NID_sect233r1, /* sect233r1 (7) */ | |
187 | NID_sect239k1, /* sect239k1 (8) */ | |
188 | NID_sect283k1, /* sect283k1 (9) */ | |
189 | NID_sect283r1, /* sect283r1 (10) */ | |
190 | NID_sect409k1, /* sect409k1 (11) */ | |
191 | NID_sect409r1, /* sect409r1 (12) */ | |
192 | NID_sect571k1, /* sect571k1 (13) */ | |
193 | NID_sect571r1, /* sect571r1 (14) */ | |
194 | NID_secp160k1, /* secp160k1 (15) */ | |
195 | NID_secp160r1, /* secp160r1 (16) */ | |
196 | NID_secp160r2, /* secp160r2 (17) */ | |
197 | NID_secp192k1, /* secp192k1 (18) */ | |
198 | NID_X9_62_prime192v1, /* secp192r1 (19) */ | |
199 | NID_secp224k1, /* secp224k1 (20) */ | |
200 | NID_secp224r1, /* secp224r1 (21) */ | |
201 | NID_secp256k1, /* secp256k1 (22) */ | |
202 | NID_X9_62_prime256v1, /* secp256r1 (23) */ | |
203 | NID_secp384r1, /* secp384r1 (24) */ | |
204 | NID_secp521r1 /* secp521r1 (25) */ | |
205 | }; | |
eda3766b | 206 | |
d0595f17 DSH |
207 | |
208 | static const unsigned char ecformats_default[] = | |
eda3766b | 209 | { |
d0595f17 DSH |
210 | TLSEXT_ECPOINTFORMAT_uncompressed, |
211 | TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime, | |
212 | TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2 | |
213 | }; | |
214 | ||
215 | static const unsigned char eccurves_default[] = | |
216 | { | |
217 | 0,14, /* sect571r1 (14) */ | |
218 | 0,13, /* sect571k1 (13) */ | |
219 | 0,25, /* secp521r1 (25) */ | |
220 | 0,11, /* sect409k1 (11) */ | |
221 | 0,12, /* sect409r1 (12) */ | |
222 | 0,24, /* secp384r1 (24) */ | |
223 | 0,9, /* sect283k1 (9) */ | |
224 | 0,10, /* sect283r1 (10) */ | |
225 | 0,22, /* secp256k1 (22) */ | |
226 | 0,23, /* secp256r1 (23) */ | |
227 | 0,8, /* sect239k1 (8) */ | |
228 | 0,6, /* sect233k1 (6) */ | |
229 | 0,7, /* sect233r1 (7) */ | |
230 | 0,20, /* secp224k1 (20) */ | |
231 | 0,21, /* secp224r1 (21) */ | |
232 | 0,4, /* sect193r1 (4) */ | |
233 | 0,5, /* sect193r2 (5) */ | |
234 | 0,18, /* secp192k1 (18) */ | |
235 | 0,19, /* secp192r1 (19) */ | |
236 | 0,1, /* sect163k1 (1) */ | |
237 | 0,2, /* sect163r1 (2) */ | |
238 | 0,3, /* sect163r2 (3) */ | |
239 | 0,15, /* secp160k1 (15) */ | |
240 | 0,16, /* secp160r1 (16) */ | |
241 | 0,17, /* secp160r2 (17) */ | |
eda3766b DSH |
242 | }; |
243 | ||
525de5d3 DSH |
244 | int tls1_ec_curve_id2nid(int curve_id) |
245 | { | |
246 | /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */ | |
1e26a8ba GT |
247 | if ((curve_id < 1) || ((unsigned int)curve_id > |
248 | sizeof(nid_list)/sizeof(nid_list[0]))) | |
249 | return 0; | |
525de5d3 DSH |
250 | return nid_list[curve_id-1]; |
251 | } | |
252 | ||
253 | int tls1_ec_nid2curve_id(int nid) | |
254 | { | |
255 | /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */ | |
256 | switch (nid) | |
257 | { | |
258 | case NID_sect163k1: /* sect163k1 (1) */ | |
259 | return 1; | |
260 | case NID_sect163r1: /* sect163r1 (2) */ | |
261 | return 2; | |
262 | case NID_sect163r2: /* sect163r2 (3) */ | |
263 | return 3; | |
264 | case NID_sect193r1: /* sect193r1 (4) */ | |
265 | return 4; | |
266 | case NID_sect193r2: /* sect193r2 (5) */ | |
267 | return 5; | |
268 | case NID_sect233k1: /* sect233k1 (6) */ | |
269 | return 6; | |
270 | case NID_sect233r1: /* sect233r1 (7) */ | |
271 | return 7; | |
272 | case NID_sect239k1: /* sect239k1 (8) */ | |
273 | return 8; | |
274 | case NID_sect283k1: /* sect283k1 (9) */ | |
275 | return 9; | |
276 | case NID_sect283r1: /* sect283r1 (10) */ | |
277 | return 10; | |
278 | case NID_sect409k1: /* sect409k1 (11) */ | |
279 | return 11; | |
280 | case NID_sect409r1: /* sect409r1 (12) */ | |
281 | return 12; | |
282 | case NID_sect571k1: /* sect571k1 (13) */ | |
283 | return 13; | |
284 | case NID_sect571r1: /* sect571r1 (14) */ | |
285 | return 14; | |
286 | case NID_secp160k1: /* secp160k1 (15) */ | |
287 | return 15; | |
288 | case NID_secp160r1: /* secp160r1 (16) */ | |
289 | return 16; | |
290 | case NID_secp160r2: /* secp160r2 (17) */ | |
291 | return 17; | |
292 | case NID_secp192k1: /* secp192k1 (18) */ | |
293 | return 18; | |
294 | case NID_X9_62_prime192v1: /* secp192r1 (19) */ | |
295 | return 19; | |
296 | case NID_secp224k1: /* secp224k1 (20) */ | |
297 | return 20; | |
298 | case NID_secp224r1: /* secp224r1 (21) */ | |
299 | return 21; | |
300 | case NID_secp256k1: /* secp256k1 (22) */ | |
301 | return 22; | |
302 | case NID_X9_62_prime256v1: /* secp256r1 (23) */ | |
303 | return 23; | |
304 | case NID_secp384r1: /* secp384r1 (24) */ | |
305 | return 24; | |
306 | case NID_secp521r1: /* secp521r1 (25) */ | |
307 | return 25; | |
308 | default: | |
309 | return 0; | |
310 | } | |
311 | } | |
fd2b65ce DSH |
312 | /* Get curves list, if "sess" is set return client curves otherwise |
313 | * preferred list | |
314 | */ | |
315 | static void tls1_get_curvelist(SSL *s, int sess, | |
316 | const unsigned char **pcurves, | |
317 | size_t *pcurveslen) | |
318 | { | |
319 | if (sess) | |
320 | { | |
321 | *pcurves = s->session->tlsext_ellipticcurvelist; | |
322 | *pcurveslen = s->session->tlsext_ellipticcurvelist_length; | |
323 | } | |
324 | else | |
325 | { | |
326 | *pcurves = s->tlsext_ellipticcurvelist; | |
327 | *pcurveslen = s->tlsext_ellipticcurvelist_length; | |
328 | } | |
329 | /* If not set use default: for now static structure */ | |
330 | if (!*pcurves) | |
331 | { | |
332 | *pcurves = eccurves_default; | |
333 | *pcurveslen = sizeof(eccurves_default); | |
334 | } | |
335 | } | |
d0595f17 | 336 | |
a4352630 DSH |
337 | /* Return nth shared curve. If nmatch == -1 return number of |
338 | * matches. | |
d0595f17 | 339 | */ |
a4352630 DSH |
340 | |
341 | int tls1_shared_curve(SSL *s, int nmatch) | |
d0595f17 DSH |
342 | { |
343 | const unsigned char *pref, *supp; | |
344 | size_t preflen, supplen, i, j; | |
345 | int k; | |
a4352630 DSH |
346 | /* Can't do anything on client side */ |
347 | if (s->server == 0) | |
348 | return -1; | |
349 | tls1_get_curvelist(s, !!(s->options & SSL_OP_CIPHER_SERVER_PREFERENCE), | |
350 | &supp, &supplen); | |
351 | tls1_get_curvelist(s, !(s->options & SSL_OP_CIPHER_SERVER_PREFERENCE), | |
352 | &pref, &preflen); | |
353 | preflen /= 2; | |
354 | supplen /= 2; | |
d0595f17 DSH |
355 | k = 0; |
356 | for (i = 0; i < preflen; i++, pref+=2) | |
357 | { | |
358 | const unsigned char *tsupp = supp; | |
359 | for (j = 0; j < supplen; j++, tsupp+=2) | |
360 | { | |
361 | if (pref[0] == tsupp[0] && pref[1] == tsupp[1]) | |
362 | { | |
363 | if (nmatch == k) | |
a4352630 DSH |
364 | { |
365 | int id = (pref[0] << 8) | pref[1]; | |
366 | return tls1_ec_curve_id2nid(id); | |
367 | } | |
d0595f17 DSH |
368 | k++; |
369 | } | |
370 | } | |
371 | } | |
d0595f17 | 372 | if (nmatch == -1) |
a4352630 DSH |
373 | return k; |
374 | return 0; | |
d0595f17 DSH |
375 | } |
376 | ||
377 | int tls1_set_curves(unsigned char **pext, size_t *pextlen, | |
378 | int *curves, size_t ncurves) | |
379 | { | |
380 | unsigned char *clist, *p; | |
381 | size_t i; | |
382 | /* Bitmap of curves included to detect duplicates: only works | |
383 | * while curve ids < 32 | |
384 | */ | |
385 | unsigned long dup_list = 0; | |
386 | clist = OPENSSL_malloc(ncurves * 2); | |
387 | if (!clist) | |
388 | return 0; | |
389 | for (i = 0, p = clist; i < ncurves; i++) | |
390 | { | |
391 | unsigned long idmask; | |
392 | int id; | |
393 | id = tls1_ec_nid2curve_id(curves[i]); | |
394 | idmask = 1L << id; | |
395 | if (!id || (dup_list & idmask)) | |
396 | { | |
397 | OPENSSL_free(clist); | |
398 | return 0; | |
399 | } | |
400 | dup_list |= idmask; | |
401 | s2n(id, p); | |
402 | } | |
403 | if (*pext) | |
404 | OPENSSL_free(*pext); | |
405 | *pext = clist; | |
406 | *pextlen = ncurves * 2; | |
407 | return 1; | |
408 | } | |
409 | ||
410 | #define MAX_CURVELIST 25 | |
411 | ||
412 | typedef struct | |
413 | { | |
414 | size_t nidcnt; | |
415 | int nid_arr[MAX_CURVELIST]; | |
416 | } nid_cb_st; | |
417 | ||
418 | static int nid_cb(const char *elem, int len, void *arg) | |
419 | { | |
420 | nid_cb_st *narg = arg; | |
421 | size_t i; | |
422 | int nid; | |
423 | char etmp[20]; | |
424 | if (narg->nidcnt == MAX_CURVELIST) | |
425 | return 0; | |
426 | if (len > (int)(sizeof(etmp) - 1)) | |
427 | return 0; | |
428 | memcpy(etmp, elem, len); | |
429 | etmp[len] = 0; | |
430 | nid = EC_curve_nist2nid(etmp); | |
431 | if (nid == NID_undef) | |
432 | nid = OBJ_sn2nid(etmp); | |
433 | if (nid == NID_undef) | |
434 | nid = OBJ_ln2nid(etmp); | |
435 | if (nid == NID_undef) | |
436 | return 0; | |
437 | for (i = 0; i < narg->nidcnt; i++) | |
438 | if (narg->nid_arr[i] == nid) | |
439 | return 0; | |
440 | narg->nid_arr[narg->nidcnt++] = nid; | |
441 | return 1; | |
442 | } | |
443 | /* Set curves based on a colon separate list */ | |
444 | int tls1_set_curves_list(unsigned char **pext, size_t *pextlen, | |
445 | const char *str) | |
446 | { | |
447 | nid_cb_st ncb; | |
448 | ncb.nidcnt = 0; | |
449 | if (!CONF_parse_list(str, ':', 1, nid_cb, &ncb)) | |
450 | return 0; | |
451 | return tls1_set_curves(pext, pextlen, ncb.nid_arr, ncb.nidcnt); | |
452 | } | |
fd2b65ce DSH |
453 | /* For an EC key set TLS id and required compression based on parameters */ |
454 | static int tls1_set_ec_id(unsigned char *curve_id, unsigned char *comp_id, | |
455 | EC_KEY *ec) | |
456 | { | |
457 | int is_prime, id; | |
458 | const EC_GROUP *grp; | |
459 | const EC_POINT *pt; | |
460 | const EC_METHOD *meth; | |
461 | if (!ec) | |
462 | return 0; | |
463 | /* Determine if it is a prime field */ | |
464 | grp = EC_KEY_get0_group(ec); | |
465 | pt = EC_KEY_get0_public_key(ec); | |
466 | if (!grp || !pt) | |
467 | return 0; | |
468 | meth = EC_GROUP_method_of(grp); | |
469 | if (!meth) | |
470 | return 0; | |
471 | if (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field) | |
472 | is_prime = 1; | |
473 | else | |
474 | is_prime = 0; | |
475 | /* Determine curve ID */ | |
476 | id = EC_GROUP_get_curve_name(grp); | |
477 | id = tls1_ec_nid2curve_id(id); | |
478 | /* If we have an ID set it, otherwise set arbitrary explicit curve */ | |
479 | if (id) | |
480 | { | |
481 | curve_id[0] = 0; | |
482 | curve_id[1] = (unsigned char)id; | |
483 | } | |
484 | else | |
485 | { | |
486 | curve_id[0] = 0xff; | |
487 | if (is_prime) | |
488 | curve_id[1] = 0x01; | |
489 | else | |
490 | curve_id[1] = 0x02; | |
491 | } | |
492 | if (comp_id) | |
493 | { | |
494 | if (EC_KEY_get_conv_form(ec) == POINT_CONVERSION_COMPRESSED) | |
495 | { | |
496 | if (is_prime) | |
497 | *comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime; | |
498 | else | |
499 | *comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2; | |
500 | } | |
501 | else | |
502 | *comp_id = TLSEXT_ECPOINTFORMAT_uncompressed; | |
503 | } | |
504 | return 1; | |
505 | } | |
506 | /* Check an EC key is compatible with extensions */ | |
507 | static int tls1_check_ec_key(SSL *s, | |
508 | unsigned char *curve_id, unsigned char *comp_id) | |
509 | { | |
510 | const unsigned char *p; | |
511 | size_t plen, i; | |
a4352630 | 512 | int j; |
fd2b65ce DSH |
513 | /* If point formats extension present check it, otherwise everything |
514 | * is supported (see RFC4492). | |
515 | */ | |
516 | if (comp_id && s->session->tlsext_ecpointformatlist) | |
517 | { | |
518 | p = s->session->tlsext_ecpointformatlist; | |
519 | plen = s->session->tlsext_ecpointformatlist_length; | |
520 | for (i = 0; i < plen; i++, p++) | |
521 | { | |
522 | if (*comp_id == *p) | |
523 | break; | |
524 | } | |
525 | if (i == plen) | |
526 | return 0; | |
527 | } | |
a4352630 DSH |
528 | /* Check curve is consistent with client and server preferences */ |
529 | for (j = 0; j <= 1; j++) | |
fd2b65ce | 530 | { |
a4352630 | 531 | tls1_get_curvelist(s, j, &p, &plen); |
fd2b65ce DSH |
532 | for (i = 0; i < plen; i+=2, p+=2) |
533 | { | |
534 | if (p[0] == curve_id[0] && p[1] == curve_id[1]) | |
a4352630 | 535 | break; |
fd2b65ce | 536 | } |
a4352630 DSH |
537 | if (i == plen) |
538 | return 0; | |
fd2b65ce DSH |
539 | } |
540 | return 1; | |
541 | } | |
542 | /* Check EC server key is compatible with client extensions */ | |
543 | int tls1_check_ec_server_key(SSL *s) | |
544 | { | |
545 | int rv; | |
546 | CERT_PKEY *cpk = s->cert->pkeys + SSL_PKEY_ECC; | |
547 | EVP_PKEY *pkey; | |
548 | unsigned char comp_id, curve_id[2]; | |
549 | if (!cpk->x509 || !cpk->privatekey) | |
550 | return 0; | |
551 | pkey = X509_get_pubkey(cpk->x509); | |
552 | if (!pkey) | |
553 | return 0; | |
554 | rv = tls1_set_ec_id(curve_id, &comp_id, pkey->pkey.ec); | |
555 | EVP_PKEY_free(pkey); | |
556 | if (!rv) | |
557 | return 0; | |
558 | return tls1_check_ec_key(s, curve_id, &comp_id); | |
559 | } | |
560 | /* Check EC temporary key is compatible with client extensions */ | |
561 | int tls1_check_ec_tmp_key(SSL *s) | |
562 | { | |
563 | unsigned char curve_id[2]; | |
564 | EC_KEY *ec = s->cert->ecdh_tmp; | |
a4352630 DSH |
565 | if (s->cert->ecdh_tmp_auto) |
566 | { | |
567 | /* Need a shared curve */ | |
568 | if (tls1_shared_curve(s, 0)) | |
569 | return 1; | |
570 | else return 0; | |
571 | } | |
fd2b65ce DSH |
572 | if (!ec) |
573 | { | |
574 | if (s->cert->ecdh_tmp_cb) | |
575 | return 1; | |
576 | else | |
577 | return 0; | |
578 | } | |
579 | if (!tls1_set_ec_id(curve_id, NULL, ec)) | |
580 | return 1; | |
581 | return tls1_check_ec_key(s, curve_id, NULL); | |
582 | } | |
d0595f17 | 583 | |
525de5d3 | 584 | #endif /* OPENSSL_NO_EC */ |
f1fd4544 | 585 | |
ed3883d2 | 586 | #ifndef OPENSSL_NO_TLSEXT |
fc101f88 DSH |
587 | |
588 | /* List of supported signature algorithms and hashes. Should make this | |
589 | * customisable at some point, for now include everything we support. | |
590 | */ | |
591 | ||
592 | #ifdef OPENSSL_NO_RSA | |
593 | #define tlsext_sigalg_rsa(md) /* */ | |
594 | #else | |
595 | #define tlsext_sigalg_rsa(md) md, TLSEXT_signature_rsa, | |
596 | #endif | |
597 | ||
598 | #ifdef OPENSSL_NO_DSA | |
599 | #define tlsext_sigalg_dsa(md) /* */ | |
600 | #else | |
601 | #define tlsext_sigalg_dsa(md) md, TLSEXT_signature_dsa, | |
602 | #endif | |
603 | ||
604 | #ifdef OPENSSL_NO_ECDSA | |
605 | #define tlsext_sigalg_ecdsa(md) /* */ | |
606 | #else | |
654ac273 | 607 | #define tlsext_sigalg_ecdsa(md) md, TLSEXT_signature_ecdsa, |
fc101f88 DSH |
608 | #endif |
609 | ||
610 | #define tlsext_sigalg(md) \ | |
611 | tlsext_sigalg_rsa(md) \ | |
612 | tlsext_sigalg_dsa(md) \ | |
613 | tlsext_sigalg_ecdsa(md) | |
614 | ||
615 | static unsigned char tls12_sigalgs[] = { | |
616 | #ifndef OPENSSL_NO_SHA512 | |
617 | tlsext_sigalg(TLSEXT_hash_sha512) | |
618 | tlsext_sigalg(TLSEXT_hash_sha384) | |
619 | #endif | |
620 | #ifndef OPENSSL_NO_SHA256 | |
621 | tlsext_sigalg(TLSEXT_hash_sha256) | |
622 | tlsext_sigalg(TLSEXT_hash_sha224) | |
623 | #endif | |
624 | #ifndef OPENSSL_NO_SHA | |
625 | tlsext_sigalg(TLSEXT_hash_sha1) | |
626 | #endif | |
627 | #ifndef OPENSSL_NO_MD5 | |
628 | tlsext_sigalg_rsa(TLSEXT_hash_md5) | |
629 | #endif | |
630 | }; | |
631 | ||
0f229cce | 632 | size_t tls12_get_sig_algs(SSL *s, unsigned char *p) |
f37f20ff | 633 | { |
4453cd8c DSH |
634 | const unsigned char *sigs; |
635 | size_t sigslen; | |
636 | sigs = s->cert->conf_sigalgs; | |
0f229cce | 637 | |
4453cd8c DSH |
638 | if (sigs) |
639 | sigslen = s->cert->conf_sigalgslen; | |
640 | else | |
0f229cce | 641 | { |
4453cd8c DSH |
642 | sigs = tls12_sigalgs; |
643 | sigslen = sizeof(tls12_sigalgs); | |
ebc5e72f | 644 | #ifdef OPENSSL_FIPS |
4453cd8c DSH |
645 | /* If FIPS mode don't include MD5 which is last */ |
646 | if (FIPS_mode()) | |
647 | sigslen -= 2; | |
ebc5e72f | 648 | #endif |
4453cd8c DSH |
649 | } |
650 | ||
f37f20ff | 651 | if (p) |
4453cd8c DSH |
652 | memcpy(p, sigs, sigslen); |
653 | return sigslen; | |
f37f20ff | 654 | } |
fc101f88 | 655 | |
a9e1c50b BL |
656 | /* byte_compare is a compare function for qsort(3) that compares bytes. */ |
657 | static int byte_compare(const void *in_a, const void *in_b) | |
658 | { | |
659 | unsigned char a = *((const unsigned char*) in_a); | |
660 | unsigned char b = *((const unsigned char*) in_b); | |
661 | ||
662 | if (a > b) | |
663 | return 1; | |
664 | else if (a < b) | |
665 | return -1; | |
666 | return 0; | |
667 | } | |
668 | ||
f1fd4544 BM |
669 | unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned char *limit) |
670 | { | |
ed3883d2 BM |
671 | int extdatalen=0; |
672 | unsigned char *ret = p; | |
d0595f17 DSH |
673 | #ifndef OPENSSL_NO_EC |
674 | /* See if we support any ECC ciphersuites */ | |
675 | int using_ecc = 0; | |
676 | if (s->version != DTLS1_VERSION && s->version >= TLS1_VERSION) | |
677 | { | |
678 | int i; | |
679 | unsigned long alg_k, alg_a; | |
680 | STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s); | |
681 | ||
682 | for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++) | |
683 | { | |
684 | SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i); | |
685 | ||
686 | alg_k = c->algorithm_mkey; | |
687 | alg_a = c->algorithm_auth; | |
688 | if ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe) | |
689 | || (alg_a & SSL_aECDSA))) | |
690 | { | |
691 | using_ecc = 1; | |
692 | break; | |
693 | } | |
694 | } | |
695 | } | |
696 | #endif | |
ed3883d2 | 697 | |
13f6d57b DSH |
698 | /* don't add extensions for SSLv3 unless doing secure renegotiation */ |
699 | if (s->client_version == SSL3_VERSION | |
700 | && !s->s3->send_connection_binding) | |
5f8f94a6 DSH |
701 | return p; |
702 | ||
ed3883d2 BM |
703 | ret+=2; |
704 | ||
705 | if (ret>=limit) return NULL; /* this really never occurs, but ... */ | |
6434abbf | 706 | |
a70183bc | 707 | if (s->tlsext_hostname != NULL) |
f1fd4544 | 708 | { |
ed3883d2 BM |
709 | /* Add TLS extension servername to the Client Hello message */ |
710 | unsigned long size_str; | |
711 | long lenmax; | |
712 | ||
a70183bc | 713 | /* check for enough space. |
52b8dad8 BM |
714 | 4 for the servername type and entension length |
715 | 2 for servernamelist length | |
716 | 1 for the hostname type | |
717 | 2 for hostname length | |
718 | + hostname length | |
a70183bc | 719 | */ |
52b8dad8 | 720 | |
761772d7 BM |
721 | if ((lenmax = limit - ret - 9) < 0 |
722 | || (size_str = strlen(s->tlsext_hostname)) > (unsigned long)lenmax) | |
a70183bc BM |
723 | return NULL; |
724 | ||
725 | /* extension type and length */ | |
726 | s2n(TLSEXT_TYPE_server_name,ret); | |
727 | s2n(size_str+5,ret); | |
f1fd4544 | 728 | |
a70183bc | 729 | /* length of servername list */ |
ed3883d2 | 730 | s2n(size_str+3,ret); |
a70183bc BM |
731 | |
732 | /* hostname type, length and hostname */ | |
f1fd4544 | 733 | *(ret++) = (unsigned char) TLSEXT_NAMETYPE_host_name; |
ed3883d2 | 734 | s2n(size_str,ret); |
ed3883d2 BM |
735 | memcpy(ret, s->tlsext_hostname, size_str); |
736 | ret+=size_str; | |
f1fd4544 | 737 | } |
761772d7 | 738 | |
423c66f1 | 739 | /* Add RI if renegotiating */ |
bdd53508 | 740 | if (s->renegotiate) |
423c66f1 | 741 | { |
860c3dd1 DSH |
742 | int el; |
743 | ||
744 | if(!ssl_add_clienthello_renegotiate_ext(s, 0, &el, 0)) | |
745 | { | |
746 | SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
747 | return NULL; | |
748 | } | |
749 | ||
750 | if((limit - p - 4 - el) < 0) return NULL; | |
751 | ||
752 | s2n(TLSEXT_TYPE_renegotiate,ret); | |
753 | s2n(el,ret); | |
754 | ||
755 | if(!ssl_add_clienthello_renegotiate_ext(s, ret, &el, el)) | |
756 | { | |
757 | SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
758 | return NULL; | |
759 | } | |
760 | ||
761 | ret += el; | |
762 | } | |
763 | ||
edc032b5 | 764 | #ifndef OPENSSL_NO_SRP |
1df80b65 | 765 | /* Add SRP username if there is one */ |
edc032b5 | 766 | if (s->srp_ctx.login != NULL) |
1df80b65 | 767 | { /* Add TLS extension SRP username to the Client Hello message */ |
edc032b5 | 768 | |
1df80b65 DSH |
769 | int login_len = strlen(s->srp_ctx.login); |
770 | if (login_len > 255 || login_len == 0) | |
edc032b5 BL |
771 | { |
772 | SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
773 | return NULL; | |
1df80b65 DSH |
774 | } |
775 | ||
776 | /* check for enough space. | |
777 | 4 for the srp type type and entension length | |
778 | 1 for the srp user identity | |
779 | + srp user identity length | |
780 | */ | |
781 | if ((limit - ret - 5 - login_len) < 0) return NULL; | |
782 | ||
783 | /* fill in the extension */ | |
edc032b5 BL |
784 | s2n(TLSEXT_TYPE_srp,ret); |
785 | s2n(login_len+1,ret); | |
1df80b65 DSH |
786 | (*ret++) = (unsigned char) login_len; |
787 | memcpy(ret, s->srp_ctx.login, login_len); | |
edc032b5 BL |
788 | ret+=login_len; |
789 | } | |
790 | #endif | |
791 | ||
36ca4ba6 | 792 | #ifndef OPENSSL_NO_EC |
d0595f17 | 793 | if (using_ecc) |
36ca4ba6 BM |
794 | { |
795 | /* Add TLS extension ECPointFormats to the ClientHello message */ | |
796 | long lenmax; | |
d0595f17 DSH |
797 | const unsigned char *plist; |
798 | size_t plistlen; | |
799 | /* If we have a custom point format list use it otherwise | |
800 | * use default */ | |
801 | plist = s->tlsext_ecpointformatlist; | |
802 | if (plist) | |
803 | plistlen = s->tlsext_ecpointformatlist_length; | |
804 | else | |
805 | { | |
806 | plist = ecformats_default; | |
807 | plistlen = sizeof(ecformats_default); | |
808 | } | |
36ca4ba6 | 809 | |
761772d7 | 810 | if ((lenmax = limit - ret - 5) < 0) return NULL; |
d0595f17 DSH |
811 | if (plistlen > (size_t)lenmax) return NULL; |
812 | if (plistlen > 255) | |
019fdc78 BM |
813 | { |
814 | SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
815 | return NULL; | |
816 | } | |
36ca4ba6 BM |
817 | |
818 | s2n(TLSEXT_TYPE_ec_point_formats,ret); | |
d0595f17 DSH |
819 | s2n(plistlen + 1,ret); |
820 | *(ret++) = (unsigned char)plistlen ; | |
821 | memcpy(ret, plist, plistlen); | |
822 | ret+=plistlen; | |
823 | ||
33273721 | 824 | /* Add TLS extension EllipticCurves to the ClientHello message */ |
d0595f17 | 825 | plist = s->tlsext_ellipticcurvelist; |
fd2b65ce | 826 | tls1_get_curvelist(s, 0, &plist, &plistlen); |
33273721 | 827 | |
761772d7 | 828 | if ((lenmax = limit - ret - 6) < 0) return NULL; |
d0595f17 DSH |
829 | if (plistlen > (size_t)lenmax) return NULL; |
830 | if (plistlen > 65532) | |
33273721 BM |
831 | { |
832 | SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
833 | return NULL; | |
834 | } | |
835 | ||
836 | s2n(TLSEXT_TYPE_elliptic_curves,ret); | |
d0595f17 | 837 | s2n(plistlen + 2, ret); |
a4974de9 BM |
838 | |
839 | /* NB: draft-ietf-tls-ecc-12.txt uses a one-byte prefix for | |
840 | * elliptic_curve_list, but the examples use two bytes. | |
841 | * http://www1.ietf.org/mail-archive/web/tls/current/msg00538.html | |
842 | * resolves this to two bytes. | |
843 | */ | |
d0595f17 DSH |
844 | s2n(plistlen, ret); |
845 | memcpy(ret, plist, plistlen); | |
846 | ret+=plistlen; | |
33273721 | 847 | } |
36ca4ba6 | 848 | #endif /* OPENSSL_NO_EC */ |
d3442bc7 | 849 | |
6434abbf DSH |
850 | if (!(SSL_get_options(s) & SSL_OP_NO_TICKET)) |
851 | { | |
852 | int ticklen; | |
7ba3838a | 853 | if (!s->new_session && s->session && s->session->tlsext_tick) |
6434abbf | 854 | ticklen = s->session->tlsext_ticklen; |
12bf56c0 DSH |
855 | else if (s->session && s->tlsext_session_ticket && |
856 | s->tlsext_session_ticket->data) | |
857 | { | |
858 | ticklen = s->tlsext_session_ticket->length; | |
859 | s->session->tlsext_tick = OPENSSL_malloc(ticklen); | |
860 | if (!s->session->tlsext_tick) | |
861 | return NULL; | |
862 | memcpy(s->session->tlsext_tick, | |
863 | s->tlsext_session_ticket->data, | |
864 | ticklen); | |
865 | s->session->tlsext_ticklen = ticklen; | |
866 | } | |
6434abbf DSH |
867 | else |
868 | ticklen = 0; | |
12bf56c0 DSH |
869 | if (ticklen == 0 && s->tlsext_session_ticket && |
870 | s->tlsext_session_ticket->data == NULL) | |
871 | goto skip_ext; | |
6434abbf DSH |
872 | /* Check for enough room 2 for extension type, 2 for len |
873 | * rest for ticket | |
874 | */ | |
761772d7 | 875 | if ((long)(limit - ret - 4 - ticklen) < 0) return NULL; |
6434abbf DSH |
876 | s2n(TLSEXT_TYPE_session_ticket,ret); |
877 | s2n(ticklen,ret); | |
878 | if (ticklen) | |
879 | { | |
880 | memcpy(ret, s->session->tlsext_tick, ticklen); | |
881 | ret += ticklen; | |
882 | } | |
883 | } | |
12bf56c0 | 884 | skip_ext: |
6434abbf | 885 | |
7744ef1a | 886 | if (TLS1_get_client_version(s) >= TLS1_2_VERSION) |
a2f9200f | 887 | { |
0f229cce DSH |
888 | size_t salglen; |
889 | salglen = tls12_get_sig_algs(s, NULL); | |
890 | if ((size_t)(limit - ret) < salglen + 6) | |
a2f9200f DSH |
891 | return NULL; |
892 | s2n(TLSEXT_TYPE_signature_algorithms,ret); | |
0f229cce DSH |
893 | s2n(salglen + 2, ret); |
894 | s2n(salglen, ret); | |
895 | tls12_get_sig_algs(s, ret); | |
896 | ret += salglen; | |
a2f9200f DSH |
897 | } |
898 | ||
761772d7 | 899 | #ifdef TLSEXT_TYPE_opaque_prf_input |
8025e251 DSH |
900 | if (s->s3->client_opaque_prf_input != NULL && |
901 | s->version != DTLS1_VERSION) | |
761772d7 BM |
902 | { |
903 | size_t col = s->s3->client_opaque_prf_input_len; | |
904 | ||
905 | if ((long)(limit - ret - 6 - col < 0)) | |
906 | return NULL; | |
907 | if (col > 0xFFFD) /* can't happen */ | |
908 | return NULL; | |
909 | ||
910 | s2n(TLSEXT_TYPE_opaque_prf_input, ret); | |
911 | s2n(col + 2, ret); | |
912 | s2n(col, ret); | |
913 | memcpy(ret, s->s3->client_opaque_prf_input, col); | |
914 | ret += col; | |
915 | } | |
916 | #endif | |
917 | ||
8025e251 DSH |
918 | if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp && |
919 | s->version != DTLS1_VERSION) | |
67c8e7f4 DSH |
920 | { |
921 | int i; | |
922 | long extlen, idlen, itmp; | |
923 | OCSP_RESPID *id; | |
924 | ||
925 | idlen = 0; | |
926 | for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++) | |
927 | { | |
928 | id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i); | |
929 | itmp = i2d_OCSP_RESPID(id, NULL); | |
930 | if (itmp <= 0) | |
931 | return NULL; | |
932 | idlen += itmp + 2; | |
933 | } | |
934 | ||
935 | if (s->tlsext_ocsp_exts) | |
936 | { | |
937 | extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL); | |
938 | if (extlen < 0) | |
939 | return NULL; | |
940 | } | |
941 | else | |
942 | extlen = 0; | |
943 | ||
944 | if ((long)(limit - ret - 7 - extlen - idlen) < 0) return NULL; | |
945 | s2n(TLSEXT_TYPE_status_request, ret); | |
946 | if (extlen + idlen > 0xFFF0) | |
947 | return NULL; | |
948 | s2n(extlen + idlen + 5, ret); | |
949 | *(ret++) = TLSEXT_STATUSTYPE_ocsp; | |
950 | s2n(idlen, ret); | |
951 | for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++) | |
952 | { | |
953 | /* save position of id len */ | |
954 | unsigned char *q = ret; | |
955 | id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i); | |
956 | /* skip over id len */ | |
957 | ret += 2; | |
958 | itmp = i2d_OCSP_RESPID(id, &ret); | |
959 | /* write id len */ | |
960 | s2n(itmp, q); | |
961 | } | |
962 | s2n(extlen, ret); | |
963 | if (extlen > 0) | |
964 | i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &ret); | |
965 | } | |
966 | ||
4817504d DSH |
967 | #ifndef OPENSSL_NO_HEARTBEATS |
968 | /* Add Heartbeat extension */ | |
969 | s2n(TLSEXT_TYPE_heartbeat,ret); | |
970 | s2n(1,ret); | |
971 | /* Set mode: | |
972 | * 1: peer may send requests | |
973 | * 2: peer not allowed to send requests | |
974 | */ | |
975 | if (s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_RECV_REQUESTS) | |
976 | *(ret++) = SSL_TLSEXT_HB_DONT_SEND_REQUESTS; | |
977 | else | |
978 | *(ret++) = SSL_TLSEXT_HB_ENABLED; | |
979 | #endif | |
980 | ||
bf48836c | 981 | #ifndef OPENSSL_NO_NEXTPROTONEG |
ee2ffc27 BL |
982 | if (s->ctx->next_proto_select_cb && !s->s3->tmp.finish_md_len) |
983 | { | |
984 | /* The client advertises an emtpy extension to indicate its | |
985 | * support for Next Protocol Negotiation */ | |
986 | if (limit - ret - 4 < 0) | |
987 | return NULL; | |
988 | s2n(TLSEXT_TYPE_next_proto_neg,ret); | |
989 | s2n(0,ret); | |
990 | } | |
991 | #endif | |
992 | ||
333f926d BL |
993 | if(SSL_get_srtp_profiles(s)) |
994 | { | |
995 | int el; | |
996 | ||
997 | ssl_add_clienthello_use_srtp_ext(s, 0, &el, 0); | |
998 | ||
999 | if((limit - p - 4 - el) < 0) return NULL; | |
1000 | ||
1001 | s2n(TLSEXT_TYPE_use_srtp,ret); | |
1002 | s2n(el,ret); | |
1003 | ||
1004 | if(ssl_add_clienthello_use_srtp_ext(s, ret, &el, el)) | |
1005 | { | |
1006 | SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
1007 | return NULL; | |
1008 | } | |
1009 | ret += el; | |
1010 | } | |
1011 | ||
a9e1c50b BL |
1012 | /* Add TLS extension Server_Authz_DataFormats to the ClientHello */ |
1013 | /* 2 bytes for extension type */ | |
1014 | /* 2 bytes for extension length */ | |
1015 | /* 1 byte for the list length */ | |
1016 | /* 1 byte for the list (we only support audit proofs) */ | |
1017 | if (s->ctx->tlsext_authz_server_audit_proof_cb != NULL) | |
1018 | { | |
1019 | size_t lenmax; | |
1020 | const unsigned short ext_len = 2; | |
1021 | const unsigned char list_len = 1; | |
1022 | ||
1023 | if ((lenmax = limit - ret - 6) < 0) return NULL; | |
1024 | ||
1025 | s2n(TLSEXT_TYPE_server_authz, ret); | |
1026 | /* Extension length: 2 bytes */ | |
1027 | s2n(ext_len, ret); | |
1028 | *(ret++) = list_len; | |
1029 | *(ret++) = TLSEXT_AUTHZDATAFORMAT_audit_proof; | |
1030 | } | |
1031 | ||
1032 | if ((extdatalen = ret-p-2) == 0) | |
ed3883d2 BM |
1033 | return p; |
1034 | ||
1035 | s2n(extdatalen,p); | |
1036 | return ret; | |
52b8dad8 | 1037 | } |
ed3883d2 | 1038 | |
f1fd4544 BM |
1039 | unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit) |
1040 | { | |
ed3883d2 BM |
1041 | int extdatalen=0; |
1042 | unsigned char *ret = p; | |
bf48836c BL |
1043 | #ifndef OPENSSL_NO_NEXTPROTONEG |
1044 | int next_proto_neg_seen; | |
ee2ffc27 | 1045 | #endif |
ed3883d2 | 1046 | |
13f6d57b DSH |
1047 | /* don't add extensions for SSLv3, unless doing secure renegotiation */ |
1048 | if (s->version == SSL3_VERSION && !s->s3->send_connection_binding) | |
5f8f94a6 DSH |
1049 | return p; |
1050 | ||
a13c20f6 | 1051 | ret+=2; |
ed3883d2 BM |
1052 | if (ret>=limit) return NULL; /* this really never occurs, but ... */ |
1053 | ||
a13c20f6 | 1054 | if (!s->hit && s->servername_done == 1 && s->session->tlsext_hostname != NULL) |
f1fd4544 | 1055 | { |
761772d7 | 1056 | if ((long)(limit - ret - 4) < 0) return NULL; |
ed3883d2 BM |
1057 | |
1058 | s2n(TLSEXT_TYPE_server_name,ret); | |
1059 | s2n(0,ret); | |
f1fd4544 | 1060 | } |
860c3dd1 | 1061 | |
8025e251 | 1062 | if(s->s3->send_connection_binding) |
860c3dd1 DSH |
1063 | { |
1064 | int el; | |
1065 | ||
1066 | if(!ssl_add_serverhello_renegotiate_ext(s, 0, &el, 0)) | |
1067 | { | |
1068 | SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
1069 | return NULL; | |
1070 | } | |
1071 | ||
1072 | if((limit - p - 4 - el) < 0) return NULL; | |
1073 | ||
1074 | s2n(TLSEXT_TYPE_renegotiate,ret); | |
1075 | s2n(el,ret); | |
1076 | ||
1077 | if(!ssl_add_serverhello_renegotiate_ext(s, ret, &el, el)) | |
1078 | { | |
1079 | SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
1080 | return NULL; | |
1081 | } | |
1082 | ||
1083 | ret += el; | |
1084 | } | |
1085 | ||
36ca4ba6 | 1086 | #ifndef OPENSSL_NO_EC |
8025e251 DSH |
1087 | if (s->tlsext_ecpointformatlist != NULL && |
1088 | s->version != DTLS1_VERSION) | |
36ca4ba6 BM |
1089 | { |
1090 | /* Add TLS extension ECPointFormats to the ServerHello message */ | |
1091 | long lenmax; | |
1092 | ||
761772d7 | 1093 | if ((lenmax = limit - ret - 5) < 0) return NULL; |
36ca4ba6 | 1094 | if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL; |
019fdc78 BM |
1095 | if (s->tlsext_ecpointformatlist_length > 255) |
1096 | { | |
1097 | SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
1098 | return NULL; | |
1099 | } | |
36ca4ba6 BM |
1100 | |
1101 | s2n(TLSEXT_TYPE_ec_point_formats,ret); | |
1102 | s2n(s->tlsext_ecpointformatlist_length + 1,ret); | |
1103 | *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length; | |
1104 | memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length); | |
1105 | ret+=s->tlsext_ecpointformatlist_length; | |
a70183bc | 1106 | |
36ca4ba6 | 1107 | } |
33273721 | 1108 | /* Currently the server should not respond with a SupportedCurves extension */ |
36ca4ba6 | 1109 | #endif /* OPENSSL_NO_EC */ |
67c8e7f4 | 1110 | |
6434abbf DSH |
1111 | if (s->tlsext_ticket_expected |
1112 | && !(SSL_get_options(s) & SSL_OP_NO_TICKET)) | |
1113 | { | |
761772d7 | 1114 | if ((long)(limit - ret - 4) < 0) return NULL; |
6434abbf DSH |
1115 | s2n(TLSEXT_TYPE_session_ticket,ret); |
1116 | s2n(0,ret); | |
1117 | } | |
761772d7 | 1118 | |
67c8e7f4 DSH |
1119 | if (s->tlsext_status_expected) |
1120 | { | |
1121 | if ((long)(limit - ret - 4) < 0) return NULL; | |
1122 | s2n(TLSEXT_TYPE_status_request,ret); | |
1123 | s2n(0,ret); | |
1124 | } | |
1125 | ||
761772d7 | 1126 | #ifdef TLSEXT_TYPE_opaque_prf_input |
8025e251 DSH |
1127 | if (s->s3->server_opaque_prf_input != NULL && |
1128 | s->version != DTLS1_VERSION) | |
761772d7 BM |
1129 | { |
1130 | size_t sol = s->s3->server_opaque_prf_input_len; | |
6434abbf | 1131 | |
761772d7 BM |
1132 | if ((long)(limit - ret - 6 - sol) < 0) |
1133 | return NULL; | |
1134 | if (sol > 0xFFFD) /* can't happen */ | |
1135 | return NULL; | |
1136 | ||
1137 | s2n(TLSEXT_TYPE_opaque_prf_input, ret); | |
1138 | s2n(sol + 2, ret); | |
1139 | s2n(sol, ret); | |
1140 | memcpy(ret, s->s3->server_opaque_prf_input, sol); | |
1141 | ret += sol; | |
1142 | } | |
1143 | #endif | |
333f926d BL |
1144 | |
1145 | if(s->srtp_profile) | |
1146 | { | |
1147 | int el; | |
1148 | ||
1149 | ssl_add_serverhello_use_srtp_ext(s, 0, &el, 0); | |
1150 | ||
1151 | if((limit - p - 4 - el) < 0) return NULL; | |
1152 | ||
1153 | s2n(TLSEXT_TYPE_use_srtp,ret); | |
1154 | s2n(el,ret); | |
1155 | ||
1156 | if(ssl_add_serverhello_use_srtp_ext(s, ret, &el, el)) | |
1157 | { | |
7a236261 | 1158 | SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); |
333f926d BL |
1159 | return NULL; |
1160 | } | |
1161 | ret+=el; | |
1162 | } | |
1163 | ||
0e1dba93 DSH |
1164 | if (((s->s3->tmp.new_cipher->id & 0xFFFF)==0x80 || (s->s3->tmp.new_cipher->id & 0xFFFF)==0x81) |
1165 | && (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG)) | |
1166 | { const unsigned char cryptopro_ext[36] = { | |
1167 | 0xfd, 0xe8, /*65000*/ | |
1168 | 0x00, 0x20, /*32 bytes length*/ | |
1169 | 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85, | |
1170 | 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06, | |
1171 | 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08, | |
1172 | 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17}; | |
1173 | if (limit-ret<36) return NULL; | |
1174 | memcpy(ret,cryptopro_ext,36); | |
1175 | ret+=36; | |
1176 | ||
1177 | } | |
761772d7 | 1178 | |
4817504d | 1179 | #ifndef OPENSSL_NO_HEARTBEATS |
5733919d DSH |
1180 | /* Add Heartbeat extension if we've received one */ |
1181 | if (s->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED) | |
1182 | { | |
1183 | s2n(TLSEXT_TYPE_heartbeat,ret); | |
1184 | s2n(1,ret); | |
1185 | /* Set mode: | |
1186 | * 1: peer may send requests | |
1187 | * 2: peer not allowed to send requests | |
1188 | */ | |
1189 | if (s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_RECV_REQUESTS) | |
1190 | *(ret++) = SSL_TLSEXT_HB_DONT_SEND_REQUESTS; | |
1191 | else | |
1192 | *(ret++) = SSL_TLSEXT_HB_ENABLED; | |
192540b5 | 1193 | |
5733919d | 1194 | } |
4817504d DSH |
1195 | #endif |
1196 | ||
bf48836c | 1197 | #ifndef OPENSSL_NO_NEXTPROTONEG |
ee2ffc27 BL |
1198 | next_proto_neg_seen = s->s3->next_proto_neg_seen; |
1199 | s->s3->next_proto_neg_seen = 0; | |
1200 | if (next_proto_neg_seen && s->ctx->next_protos_advertised_cb) | |
1201 | { | |
1202 | const unsigned char *npa; | |
1203 | unsigned int npalen; | |
1204 | int r; | |
1205 | ||
1206 | r = s->ctx->next_protos_advertised_cb(s, &npa, &npalen, s->ctx->next_protos_advertised_cb_arg); | |
1207 | if (r == SSL_TLSEXT_ERR_OK) | |
1208 | { | |
1209 | if ((long)(limit - ret - 4 - npalen) < 0) return NULL; | |
1210 | s2n(TLSEXT_TYPE_next_proto_neg,ret); | |
1211 | s2n(npalen,ret); | |
1212 | memcpy(ret, npa, npalen); | |
1213 | ret += npalen; | |
1214 | s->s3->next_proto_neg_seen = 1; | |
1215 | } | |
1216 | } | |
1217 | #endif | |
1218 | ||
a9e1c50b BL |
1219 | /* If the client supports authz then see whether we have any to offer |
1220 | * to it. */ | |
1221 | if (s->s3->tlsext_authz_client_types_len) | |
1222 | { | |
1223 | size_t authz_length; | |
1224 | /* By now we already know the new cipher, so we can look ahead | |
1225 | * to see whether the cert we are going to send | |
1226 | * has any authz data attached to it. */ | |
1227 | const unsigned char* authz = ssl_get_authz_data(s, &authz_length); | |
1228 | const unsigned char* const orig_authz = authz; | |
1229 | size_t i; | |
1230 | unsigned authz_count = 0; | |
1231 | ||
1232 | /* The authz data contains a number of the following structures: | |
1233 | * uint8_t authz_type | |
1234 | * uint16_t length | |
1235 | * uint8_t data[length] | |
1236 | * | |
1237 | * First we walk over it to find the number of authz elements. */ | |
1238 | for (i = 0; i < authz_length; i++) | |
1239 | { | |
1240 | unsigned short length; | |
1241 | unsigned char type; | |
1242 | ||
1243 | type = *(authz++); | |
1244 | if (memchr(s->s3->tlsext_authz_client_types, | |
1245 | type, | |
1246 | s->s3->tlsext_authz_client_types_len) != NULL) | |
1247 | authz_count++; | |
1248 | ||
1249 | n2s(authz, length); | |
aeda172a BL |
1250 | /* n2s increments authz by 2 */ |
1251 | i += 2; | |
a9e1c50b BL |
1252 | authz += length; |
1253 | i += length; | |
1254 | } | |
1255 | ||
1256 | if (authz_count) | |
1257 | { | |
1258 | /* Add TLS extension server_authz to the ServerHello message | |
1259 | * 2 bytes for extension type | |
1260 | * 2 bytes for extension length | |
1261 | * 1 byte for the list length | |
1262 | * n bytes for the list */ | |
1263 | const unsigned short ext_len = 1 + authz_count; | |
1264 | ||
1265 | if ((long)(limit - ret - 4 - ext_len) < 0) return NULL; | |
1266 | s2n(TLSEXT_TYPE_server_authz, ret); | |
1267 | s2n(ext_len, ret); | |
1268 | *(ret++) = authz_count; | |
1269 | s->s3->tlsext_authz_promised_to_client = 1; | |
1270 | } | |
1271 | ||
1272 | authz = orig_authz; | |
1273 | for (i = 0; i < authz_length; i++) | |
1274 | { | |
1275 | unsigned short length; | |
1276 | unsigned char type; | |
1277 | ||
1278 | authz_count++; | |
1279 | type = *(authz++); | |
1280 | if (memchr(s->s3->tlsext_authz_client_types, | |
1281 | type, | |
1282 | s->s3->tlsext_authz_client_types_len) != NULL) | |
1283 | *(ret++) = type; | |
1284 | n2s(authz, length); | |
aeda172a BL |
1285 | /* n2s increments authz by 2 */ |
1286 | i += 2; | |
a9e1c50b BL |
1287 | authz += length; |
1288 | i += length; | |
1289 | } | |
1290 | } | |
1291 | ||
ed3883d2 BM |
1292 | if ((extdatalen = ret-p-2)== 0) |
1293 | return p; | |
1294 | ||
1295 | s2n(extdatalen,p); | |
1296 | return ret; | |
52b8dad8 | 1297 | } |
ed3883d2 | 1298 | |
b2284ed3 DSH |
1299 | static int ssl_scan_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al) |
1300 | { | |
ed3883d2 BM |
1301 | unsigned short type; |
1302 | unsigned short size; | |
1303 | unsigned short len; | |
f1fd4544 | 1304 | unsigned char *data = *p; |
860c3dd1 DSH |
1305 | int renegotiate_seen = 0; |
1306 | ||
a13c20f6 | 1307 | s->servername_done = 0; |
67c8e7f4 | 1308 | s->tlsext_status_type = -1; |
6f31dd72 BM |
1309 | #ifndef OPENSSL_NO_NEXTPROTONEG |
1310 | s->s3->next_proto_neg_seen = 0; | |
1311 | #endif | |
ed3883d2 | 1312 | |
4817504d DSH |
1313 | #ifndef OPENSSL_NO_HEARTBEATS |
1314 | s->tlsext_heartbeat &= ~(SSL_TLSEXT_HB_ENABLED | | |
1315 | SSL_TLSEXT_HB_DONT_SEND_REQUESTS); | |
1316 | #endif | |
4453cd8c DSH |
1317 | /* Clear any signature algorithms extension received */ |
1318 | if (s->cert->peer_sigalgs) | |
1319 | { | |
1320 | OPENSSL_free(s->cert->peer_sigalgs); | |
1321 | s->cert->peer_sigalgs = NULL; | |
1322 | } | |
1323 | /* Clear any shared sigtnature algorithms */ | |
1324 | if (s->cert->shared_sigalgs) | |
1325 | { | |
1326 | OPENSSL_free(s->cert->shared_sigalgs); | |
1327 | s->cert->shared_sigalgs = NULL; | |
1328 | } | |
4817504d | 1329 | |
ed3883d2 | 1330 | if (data >= (d+n-2)) |
c27c9cb4 | 1331 | goto ri_check; |
ed3883d2 BM |
1332 | n2s(data,len); |
1333 | ||
52b8dad8 | 1334 | if (data > (d+n-len)) |
c27c9cb4 | 1335 | goto ri_check; |
ed3883d2 | 1336 | |
f1fd4544 BM |
1337 | while (data <= (d+n-4)) |
1338 | { | |
ed3883d2 BM |
1339 | n2s(data,type); |
1340 | n2s(data,size); | |
1341 | ||
1342 | if (data+size > (d+n)) | |
c27c9cb4 | 1343 | goto ri_check; |
8e3b2dbb | 1344 | #if 0 |
0e1dba93 | 1345 | fprintf(stderr,"Received extension type %d size %d\n",type,size); |
8e3b2dbb | 1346 | #endif |
6434abbf DSH |
1347 | if (s->tlsext_debug_cb) |
1348 | s->tlsext_debug_cb(s, 0, type, data, size, | |
1349 | s->tlsext_debug_arg); | |
a13c20f6 BM |
1350 | /* The servername extension is treated as follows: |
1351 | ||
1352 | - Only the hostname type is supported with a maximum length of 255. | |
1353 | - The servername is rejected if too long or if it contains zeros, | |
1354 | in which case an fatal alert is generated. | |
1355 | - The servername field is maintained together with the session cache. | |
1356 | - When a session is resumed, the servername call back invoked in order | |
1357 | to allow the application to position itself to the right context. | |
1358 | - The servername is acknowledged if it is new for a session or when | |
1359 | it is identical to a previously used for the same session. | |
1360 | Applications can control the behaviour. They can at any time | |
1361 | set a 'desirable' servername for a new SSL object. This can be the | |
1362 | case for example with HTTPS when a Host: header field is received and | |
1363 | a renegotiation is requested. In this case, a possible servername | |
1364 | presented in the new client hello is only acknowledged if it matches | |
1365 | the value of the Host: field. | |
1366 | - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION | |
1367 | if they provide for changing an explicit servername context for the session, | |
1368 | i.e. when the session has been established with a servername extension. | |
1369 | - On session reconnect, the servername extension may be absent. | |
1370 | ||
1371 | */ | |
1372 | ||
f1fd4544 BM |
1373 | if (type == TLSEXT_TYPE_server_name) |
1374 | { | |
a70183bc | 1375 | unsigned char *sdata; |
ed3883d2 | 1376 | int servname_type; |
a70183bc BM |
1377 | int dsize; |
1378 | ||
1379 | if (size < 2) | |
1380 | { | |
1381 | *al = SSL_AD_DECODE_ERROR; | |
1382 | return 0; | |
1383 | } | |
1384 | n2s(data,dsize); | |
52b8dad8 | 1385 | size -= 2; |
a70183bc | 1386 | if (dsize > size ) |
f1fd4544 | 1387 | { |
a70183bc BM |
1388 | *al = SSL_AD_DECODE_ERROR; |
1389 | return 0; | |
1390 | } | |
1391 | ||
1392 | sdata = data; | |
1393 | while (dsize > 3) | |
1394 | { | |
1395 | servname_type = *(sdata++); | |
ed3883d2 | 1396 | n2s(sdata,len); |
a70183bc BM |
1397 | dsize -= 3; |
1398 | ||
1399 | if (len > dsize) | |
f1fd4544 BM |
1400 | { |
1401 | *al = SSL_AD_DECODE_ERROR; | |
1402 | return 0; | |
1403 | } | |
a70183bc | 1404 | if (s->servername_done == 0) |
f1fd4544 BM |
1405 | switch (servname_type) |
1406 | { | |
1407 | case TLSEXT_NAMETYPE_host_name: | |
732d31be | 1408 | if (!s->hit) |
f1fd4544 | 1409 | { |
732d31be DSH |
1410 | if(s->session->tlsext_hostname) |
1411 | { | |
1412 | *al = SSL_AD_DECODE_ERROR; | |
1413 | return 0; | |
1414 | } | |
1415 | if (len > TLSEXT_MAXLEN_host_name) | |
f1fd4544 BM |
1416 | { |
1417 | *al = TLS1_AD_UNRECOGNIZED_NAME; | |
1418 | return 0; | |
1419 | } | |
732d31be DSH |
1420 | if ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL) |
1421 | { | |
1422 | *al = TLS1_AD_INTERNAL_ERROR; | |
1423 | return 0; | |
1424 | } | |
ed3883d2 | 1425 | memcpy(s->session->tlsext_hostname, sdata, len); |
a13c20f6 BM |
1426 | s->session->tlsext_hostname[len]='\0'; |
1427 | if (strlen(s->session->tlsext_hostname) != len) { | |
1428 | OPENSSL_free(s->session->tlsext_hostname); | |
40a70628 | 1429 | s->session->tlsext_hostname = NULL; |
a13c20f6 BM |
1430 | *al = TLS1_AD_UNRECOGNIZED_NAME; |
1431 | return 0; | |
f1fd4544 | 1432 | } |
a13c20f6 BM |
1433 | s->servername_done = 1; |
1434 | ||
a13c20f6 BM |
1435 | } |
1436 | else | |
732d31be DSH |
1437 | s->servername_done = s->session->tlsext_hostname |
1438 | && strlen(s->session->tlsext_hostname) == len | |
6b9e941e | 1439 | && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0; |
a13c20f6 | 1440 | |
ed3883d2 | 1441 | break; |
f1fd4544 | 1442 | |
ed3883d2 BM |
1443 | default: |
1444 | break; | |
f1fd4544 | 1445 | } |
52b8dad8 | 1446 | |
a70183bc | 1447 | dsize -= len; |
f1fd4544 | 1448 | } |
a70183bc BM |
1449 | if (dsize != 0) |
1450 | { | |
1451 | *al = SSL_AD_DECODE_ERROR; | |
1452 | return 0; | |
1453 | } | |
1454 | ||
ed3883d2 | 1455 | } |
edc032b5 BL |
1456 | #ifndef OPENSSL_NO_SRP |
1457 | else if (type == TLSEXT_TYPE_srp) | |
1458 | { | |
1df80b65 DSH |
1459 | if (size <= 0 || ((len = data[0])) != (size -1)) |
1460 | { | |
1461 | *al = SSL_AD_DECODE_ERROR; | |
1462 | return 0; | |
1463 | } | |
1464 | if (s->srp_ctx.login != NULL) | |
edc032b5 | 1465 | { |
1df80b65 DSH |
1466 | *al = SSL_AD_DECODE_ERROR; |
1467 | return 0; | |
1468 | } | |
1469 | if ((s->srp_ctx.login = OPENSSL_malloc(len+1)) == NULL) | |
1470 | return -1; | |
1471 | memcpy(s->srp_ctx.login, &data[1], len); | |
1472 | s->srp_ctx.login[len]='\0'; | |
1473 | ||
1474 | if (strlen(s->srp_ctx.login) != len) | |
1475 | { | |
1476 | *al = SSL_AD_DECODE_ERROR; | |
1477 | return 0; | |
edc032b5 BL |
1478 | } |
1479 | } | |
1480 | #endif | |
ed3883d2 | 1481 | |
36ca4ba6 | 1482 | #ifndef OPENSSL_NO_EC |
8025e251 DSH |
1483 | else if (type == TLSEXT_TYPE_ec_point_formats && |
1484 | s->version != DTLS1_VERSION) | |
36ca4ba6 BM |
1485 | { |
1486 | unsigned char *sdata = data; | |
1487 | int ecpointformatlist_length = *(sdata++); | |
36ca4ba6 BM |
1488 | |
1489 | if (ecpointformatlist_length != size - 1) | |
1490 | { | |
1491 | *al = TLS1_AD_DECODE_ERROR; | |
1492 | return 0; | |
1493 | } | |
732d31be | 1494 | if (!s->hit) |
36ca4ba6 | 1495 | { |
732d31be DSH |
1496 | if(s->session->tlsext_ecpointformatlist) |
1497 | { | |
7d5686d3 DSH |
1498 | OPENSSL_free(s->session->tlsext_ecpointformatlist); |
1499 | s->session->tlsext_ecpointformatlist = NULL; | |
732d31be DSH |
1500 | } |
1501 | s->session->tlsext_ecpointformatlist_length = 0; | |
1502 | if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL) | |
1503 | { | |
1504 | *al = TLS1_AD_INTERNAL_ERROR; | |
1505 | return 0; | |
1506 | } | |
1507 | s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length; | |
1508 | memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length); | |
36ca4ba6 | 1509 | } |
36ca4ba6 BM |
1510 | #if 0 |
1511 | fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length); | |
1512 | sdata = s->session->tlsext_ecpointformatlist; | |
1513 | for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++) | |
1514 | fprintf(stderr,"%i ",*(sdata++)); | |
1515 | fprintf(stderr,"\n"); | |
33273721 BM |
1516 | #endif |
1517 | } | |
8025e251 DSH |
1518 | else if (type == TLSEXT_TYPE_elliptic_curves && |
1519 | s->version != DTLS1_VERSION) | |
33273721 BM |
1520 | { |
1521 | unsigned char *sdata = data; | |
1522 | int ellipticcurvelist_length = (*(sdata++) << 8); | |
1523 | ellipticcurvelist_length += (*(sdata++)); | |
1524 | ||
1525 | if (ellipticcurvelist_length != size - 2) | |
1526 | { | |
1527 | *al = TLS1_AD_DECODE_ERROR; | |
1528 | return 0; | |
1529 | } | |
732d31be | 1530 | if (!s->hit) |
33273721 | 1531 | { |
732d31be DSH |
1532 | if(s->session->tlsext_ellipticcurvelist) |
1533 | { | |
1534 | *al = TLS1_AD_DECODE_ERROR; | |
1535 | return 0; | |
1536 | } | |
1537 | s->session->tlsext_ellipticcurvelist_length = 0; | |
1538 | if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL) | |
1539 | { | |
1540 | *al = TLS1_AD_INTERNAL_ERROR; | |
1541 | return 0; | |
1542 | } | |
1543 | s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length; | |
1544 | memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length); | |
33273721 | 1545 | } |
33273721 BM |
1546 | #if 0 |
1547 | fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length); | |
1548 | sdata = s->session->tlsext_ellipticcurvelist; | |
1549 | for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++) | |
1550 | fprintf(stderr,"%i ",*(sdata++)); | |
1551 | fprintf(stderr,"\n"); | |
36ca4ba6 BM |
1552 | #endif |
1553 | } | |
c6a27f01 | 1554 | #endif /* OPENSSL_NO_EC */ |
761772d7 | 1555 | #ifdef TLSEXT_TYPE_opaque_prf_input |
8025e251 DSH |
1556 | else if (type == TLSEXT_TYPE_opaque_prf_input && |
1557 | s->version != DTLS1_VERSION) | |
761772d7 BM |
1558 | { |
1559 | unsigned char *sdata = data; | |
1560 | ||
1561 | if (size < 2) | |
1562 | { | |
1563 | *al = SSL_AD_DECODE_ERROR; | |
1564 | return 0; | |
1565 | } | |
1566 | n2s(sdata, s->s3->client_opaque_prf_input_len); | |
1567 | if (s->s3->client_opaque_prf_input_len != size - 2) | |
1568 | { | |
1569 | *al = SSL_AD_DECODE_ERROR; | |
1570 | return 0; | |
1571 | } | |
1572 | ||
1573 | if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */ | |
1574 | OPENSSL_free(s->s3->client_opaque_prf_input); | |
02c27b11 BM |
1575 | if (s->s3->client_opaque_prf_input_len == 0) |
1576 | s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */ | |
1577 | else | |
1578 | s->s3->client_opaque_prf_input = BUF_memdup(sdata, s->s3->client_opaque_prf_input_len); | |
761772d7 BM |
1579 | if (s->s3->client_opaque_prf_input == NULL) |
1580 | { | |
1581 | *al = TLS1_AD_INTERNAL_ERROR; | |
1582 | return 0; | |
1583 | } | |
1584 | } | |
1585 | #endif | |
12bf56c0 DSH |
1586 | else if (type == TLSEXT_TYPE_session_ticket) |
1587 | { | |
1588 | if (s->tls_session_ticket_ext_cb && | |
1589 | !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg)) | |
1590 | { | |
1591 | *al = TLS1_AD_INTERNAL_ERROR; | |
1592 | return 0; | |
1593 | } | |
1594 | } | |
860c3dd1 DSH |
1595 | else if (type == TLSEXT_TYPE_renegotiate) |
1596 | { | |
1597 | if(!ssl_parse_clienthello_renegotiate_ext(s, data, size, al)) | |
1598 | return 0; | |
1599 | renegotiate_seen = 1; | |
1600 | } | |
6b7be581 DSH |
1601 | else if (type == TLSEXT_TYPE_signature_algorithms) |
1602 | { | |
1603 | int dsize; | |
4453cd8c | 1604 | if (s->cert->peer_sigalgs || size < 2) |
6b7be581 DSH |
1605 | { |
1606 | *al = SSL_AD_DECODE_ERROR; | |
1607 | return 0; | |
1608 | } | |
6b7be581 DSH |
1609 | n2s(data,dsize); |
1610 | size -= 2; | |
4453cd8c | 1611 | if (dsize != size || dsize & 1 || !dsize) |
6b7be581 DSH |
1612 | { |
1613 | *al = SSL_AD_DECODE_ERROR; | |
1614 | return 0; | |
1615 | } | |
1616 | if (!tls1_process_sigalgs(s, data, dsize)) | |
1617 | { | |
1618 | *al = SSL_AD_DECODE_ERROR; | |
1619 | return 0; | |
1620 | } | |
4453cd8c DSH |
1621 | /* If sigalgs received and no shared algorithms fatal |
1622 | * error. | |
1623 | */ | |
1624 | if (s->cert->peer_sigalgs && !s->cert->shared_sigalgs) | |
1625 | { | |
1626 | SSLerr(SSL_F_SSL_SCAN_CLIENTHELLO_TLSEXT, | |
1627 | SSL_R_NO_SHARED_SIGATURE_ALGORITHMS); | |
1628 | *al = SSL_AD_ILLEGAL_PARAMETER; | |
1629 | return 0; | |
1630 | } | |
6b7be581 | 1631 | } |
8025e251 DSH |
1632 | else if (type == TLSEXT_TYPE_status_request && |
1633 | s->version != DTLS1_VERSION && s->ctx->tlsext_status_cb) | |
67c8e7f4 DSH |
1634 | { |
1635 | ||
1636 | if (size < 5) | |
1637 | { | |
1638 | *al = SSL_AD_DECODE_ERROR; | |
1639 | return 0; | |
1640 | } | |
1641 | ||
1642 | s->tlsext_status_type = *data++; | |
1643 | size--; | |
1644 | if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp) | |
1645 | { | |
1646 | const unsigned char *sdata; | |
1647 | int dsize; | |
1648 | /* Read in responder_id_list */ | |
1649 | n2s(data,dsize); | |
1650 | size -= 2; | |
1651 | if (dsize > size ) | |
1652 | { | |
1653 | *al = SSL_AD_DECODE_ERROR; | |
1654 | return 0; | |
1655 | } | |
1656 | while (dsize > 0) | |
1657 | { | |
1658 | OCSP_RESPID *id; | |
1659 | int idsize; | |
1660 | if (dsize < 4) | |
1661 | { | |
1662 | *al = SSL_AD_DECODE_ERROR; | |
1663 | return 0; | |
1664 | } | |
1665 | n2s(data, idsize); | |
1666 | dsize -= 2 + idsize; | |
9770924f | 1667 | size -= 2 + idsize; |
67c8e7f4 DSH |
1668 | if (dsize < 0) |
1669 | { | |
1670 | *al = SSL_AD_DECODE_ERROR; | |
1671 | return 0; | |
1672 | } | |
1673 | sdata = data; | |
1674 | data += idsize; | |
1675 | id = d2i_OCSP_RESPID(NULL, | |
1676 | &sdata, idsize); | |
1677 | if (!id) | |
1678 | { | |
1679 | *al = SSL_AD_DECODE_ERROR; | |
1680 | return 0; | |
1681 | } | |
1682 | if (data != sdata) | |
1683 | { | |
1684 | OCSP_RESPID_free(id); | |
1685 | *al = SSL_AD_DECODE_ERROR; | |
1686 | return 0; | |
1687 | } | |
1688 | if (!s->tlsext_ocsp_ids | |
1689 | && !(s->tlsext_ocsp_ids = | |
1690 | sk_OCSP_RESPID_new_null())) | |
1691 | { | |
1692 | OCSP_RESPID_free(id); | |
1693 | *al = SSL_AD_INTERNAL_ERROR; | |
1694 | return 0; | |
1695 | } | |
1696 | if (!sk_OCSP_RESPID_push( | |
1697 | s->tlsext_ocsp_ids, id)) | |
1698 | { | |
1699 | OCSP_RESPID_free(id); | |
1700 | *al = SSL_AD_INTERNAL_ERROR; | |
1701 | return 0; | |
1702 | } | |
1703 | } | |
1704 | ||
1705 | /* Read in request_extensions */ | |
9770924f BM |
1706 | if (size < 2) |
1707 | { | |
1708 | *al = SSL_AD_DECODE_ERROR; | |
1709 | return 0; | |
1710 | } | |
67c8e7f4 DSH |
1711 | n2s(data,dsize); |
1712 | size -= 2; | |
9770924f | 1713 | if (dsize != size) |
67c8e7f4 DSH |
1714 | { |
1715 | *al = SSL_AD_DECODE_ERROR; | |
1716 | return 0; | |
1717 | } | |
1718 | sdata = data; | |
1719 | if (dsize > 0) | |
1720 | { | |
25536ea6 DSH |
1721 | if (s->tlsext_ocsp_exts) |
1722 | { | |
1723 | sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts, | |
1724 | X509_EXTENSION_free); | |
1725 | } | |
1726 | ||
67c8e7f4 DSH |
1727 | s->tlsext_ocsp_exts = |
1728 | d2i_X509_EXTENSIONS(NULL, | |
1729 | &sdata, dsize); | |
1730 | if (!s->tlsext_ocsp_exts | |
1731 | || (data + dsize != sdata)) | |
1732 | { | |
1733 | *al = SSL_AD_DECODE_ERROR; | |
1734 | return 0; | |
1735 | } | |
1736 | } | |
1737 | } | |
1738 | /* We don't know what to do with any other type | |
1739 | * so ignore it. | |
1740 | */ | |
1741 | else | |
1742 | s->tlsext_status_type = -1; | |
1743 | } | |
4817504d DSH |
1744 | #ifndef OPENSSL_NO_HEARTBEATS |
1745 | else if (type == TLSEXT_TYPE_heartbeat) | |
1746 | { | |
1747 | switch(data[0]) | |
1748 | { | |
1749 | case 0x01: /* Client allows us to send HB requests */ | |
1750 | s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED; | |
1751 | break; | |
1752 | case 0x02: /* Client doesn't accept HB requests */ | |
1753 | s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED; | |
1754 | s->tlsext_heartbeat |= SSL_TLSEXT_HB_DONT_SEND_REQUESTS; | |
1755 | break; | |
192540b5 DSH |
1756 | default: *al = SSL_AD_ILLEGAL_PARAMETER; |
1757 | return 0; | |
4817504d DSH |
1758 | } |
1759 | } | |
1760 | #endif | |
bf48836c | 1761 | #ifndef OPENSSL_NO_NEXTPROTONEG |
ee2ffc27 | 1762 | else if (type == TLSEXT_TYPE_next_proto_neg && |
71fa4513 | 1763 | s->s3->tmp.finish_md_len == 0) |
ee2ffc27 BL |
1764 | { |
1765 | /* We shouldn't accept this extension on a | |
1766 | * renegotiation. | |
1767 | * | |
1768 | * s->new_session will be set on renegotiation, but we | |
1769 | * probably shouldn't rely that it couldn't be set on | |
1770 | * the initial renegotation too in certain cases (when | |
1771 | * there's some other reason to disallow resuming an | |
1772 | * earlier session -- the current code won't be doing | |
1773 | * anything like that, but this might change). | |
1774 | ||
1775 | * A valid sign that there's been a previous handshake | |
1776 | * in this connection is if s->s3->tmp.finish_md_len > | |
1777 | * 0. (We are talking about a check that will happen | |
1778 | * in the Hello protocol round, well before a new | |
1779 | * Finished message could have been computed.) */ | |
1780 | s->s3->next_proto_neg_seen = 1; | |
1781 | } | |
1782 | #endif | |
761772d7 | 1783 | |
6434abbf | 1784 | /* session ticket processed earlier */ |
333f926d BL |
1785 | else if (type == TLSEXT_TYPE_use_srtp) |
1786 | { | |
1787 | if(ssl_parse_clienthello_use_srtp_ext(s, data, size, | |
1788 | al)) | |
1789 | return 0; | |
1790 | } | |
1791 | ||
a9e1c50b BL |
1792 | else if (type == TLSEXT_TYPE_server_authz) |
1793 | { | |
1794 | unsigned char *sdata = data; | |
1795 | unsigned char server_authz_dataformatlist_length; | |
1796 | ||
1797 | if (size == 0) | |
1798 | { | |
1799 | *al = TLS1_AD_DECODE_ERROR; | |
1800 | return 0; | |
1801 | } | |
1802 | ||
1803 | server_authz_dataformatlist_length = *(sdata++); | |
1804 | ||
1805 | if (server_authz_dataformatlist_length != size - 1) | |
1806 | { | |
1807 | *al = TLS1_AD_DECODE_ERROR; | |
1808 | return 0; | |
1809 | } | |
1810 | ||
1811 | /* Successful session resumption uses the same authz | |
1812 | * information as the original session so we ignore this | |
1813 | * in the case of a session resumption. */ | |
1814 | if (!s->hit) | |
1815 | { | |
1816 | size_t i; | |
195b9eee BL |
1817 | if (s->s3->tlsext_authz_client_types != NULL) |
1818 | OPENSSL_free(s->s3->tlsext_authz_client_types); | |
a9e1c50b BL |
1819 | s->s3->tlsext_authz_client_types = |
1820 | OPENSSL_malloc(server_authz_dataformatlist_length); | |
1821 | if (!s->s3->tlsext_authz_client_types) | |
1822 | { | |
1823 | *al = TLS1_AD_INTERNAL_ERROR; | |
1824 | return 0; | |
1825 | } | |
1826 | ||
1827 | s->s3->tlsext_authz_client_types_len = | |
1828 | server_authz_dataformatlist_length; | |
1829 | memcpy(s->s3->tlsext_authz_client_types, | |
1830 | sdata, | |
1831 | server_authz_dataformatlist_length); | |
1832 | ||
1833 | /* Sort the types in order to check for duplicates. */ | |
1834 | qsort(s->s3->tlsext_authz_client_types, | |
1835 | server_authz_dataformatlist_length, | |
1836 | 1 /* element size */, | |
1837 | byte_compare); | |
1838 | ||
1839 | for (i = 0; i < server_authz_dataformatlist_length; i++) | |
1840 | { | |
1841 | if (i > 0 && | |
1842 | s->s3->tlsext_authz_client_types[i] == | |
1843 | s->s3->tlsext_authz_client_types[i-1]) | |
1844 | { | |
1845 | *al = TLS1_AD_DECODE_ERROR; | |
1846 | return 0; | |
1847 | } | |
1848 | } | |
1849 | } | |
1850 | } | |
1851 | ||
6434abbf | 1852 | data+=size; |
f1fd4544 | 1853 | } |
a9e1c50b | 1854 | |
f1fd4544 | 1855 | *p = data; |
c27c9cb4 DSH |
1856 | |
1857 | ri_check: | |
1858 | ||
1859 | /* Need RI if renegotiating */ | |
1860 | ||
bdd53508 | 1861 | if (!renegotiate_seen && s->renegotiate && |
c27c9cb4 DSH |
1862 | !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) |
1863 | { | |
fbed9f81 | 1864 | *al = SSL_AD_HANDSHAKE_FAILURE; |
aa09c2c6 | 1865 | SSLerr(SSL_F_SSL_SCAN_CLIENTHELLO_TLSEXT, |
c27c9cb4 DSH |
1866 | SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED); |
1867 | return 0; | |
1868 | } | |
4453cd8c DSH |
1869 | /* If no signature algorithms extension set default values */ |
1870 | if (!s->cert->peer_sigalgs) | |
1871 | ssl_cert_set_default_md(s->cert); | |
c27c9cb4 | 1872 | |
f1fd4544 | 1873 | return 1; |
52b8dad8 | 1874 | } |
f1fd4544 | 1875 | |
b2284ed3 DSH |
1876 | int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n) |
1877 | { | |
1878 | int al = -1; | |
1879 | if (ssl_scan_clienthello_tlsext(s, p, d, n, &al) <= 0) | |
1880 | { | |
1881 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1882 | return 0; | |
1883 | } | |
1884 | ||
1885 | if (ssl_check_clienthello_tlsext(s) <= 0) | |
1886 | { | |
aa09c2c6 | 1887 | SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT,SSL_R_CLIENTHELLO_TLSEXT); |
b2284ed3 DSH |
1888 | return 0; |
1889 | } | |
1890 | return 1; | |
1891 | } | |
1892 | ||
bf48836c | 1893 | #ifndef OPENSSL_NO_NEXTPROTONEG |
ee2ffc27 BL |
1894 | /* ssl_next_proto_validate validates a Next Protocol Negotiation block. No |
1895 | * elements of zero length are allowed and the set of elements must exactly fill | |
1896 | * the length of the block. */ | |
71fa4513 | 1897 | static char ssl_next_proto_validate(unsigned char *d, unsigned len) |
ee2ffc27 BL |
1898 | { |
1899 | unsigned int off = 0; | |
1900 | ||
1901 | while (off < len) | |
1902 | { | |
1903 | if (d[off] == 0) | |
1904 | return 0; | |
1905 | off += d[off]; | |
1906 | off++; | |
1907 | } | |
1908 | ||
1909 | return off == len; | |
1910 | } | |
1911 | #endif | |
1912 | ||
09e4e4b9 | 1913 | static int ssl_scan_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al) |
f1fd4544 | 1914 | { |
c8bbd98a | 1915 | unsigned short length; |
ed3883d2 BM |
1916 | unsigned short type; |
1917 | unsigned short size; | |
ed3883d2 | 1918 | unsigned char *data = *p; |
ed3883d2 | 1919 | int tlsext_servername = 0; |
860c3dd1 | 1920 | int renegotiate_seen = 0; |
ed3883d2 | 1921 | |
6f31dd72 BM |
1922 | #ifndef OPENSSL_NO_NEXTPROTONEG |
1923 | s->s3->next_proto_neg_seen = 0; | |
1924 | #endif | |
1925 | ||
4817504d DSH |
1926 | #ifndef OPENSSL_NO_HEARTBEATS |
1927 | s->tlsext_heartbeat &= ~(SSL_TLSEXT_HB_ENABLED | | |
1928 | SSL_TLSEXT_HB_DONT_SEND_REQUESTS); | |
1929 | #endif | |
1930 | ||
ed3883d2 | 1931 | if (data >= (d+n-2)) |
c27c9cb4 | 1932 | goto ri_check; |
ed3883d2 | 1933 | |
c8bbd98a BL |
1934 | n2s(data,length); |
1935 | if (data+length != d+n) | |
1936 | { | |
1937 | *al = SSL_AD_DECODE_ERROR; | |
1938 | return 0; | |
1939 | } | |
ed3883d2 | 1940 | |
f1fd4544 BM |
1941 | while(data <= (d+n-4)) |
1942 | { | |
ed3883d2 BM |
1943 | n2s(data,type); |
1944 | n2s(data,size); | |
1945 | ||
1946 | if (data+size > (d+n)) | |
c27c9cb4 | 1947 | goto ri_check; |
f1fd4544 | 1948 | |
6434abbf DSH |
1949 | if (s->tlsext_debug_cb) |
1950 | s->tlsext_debug_cb(s, 1, type, data, size, | |
1951 | s->tlsext_debug_arg); | |
1952 | ||
f1fd4544 BM |
1953 | if (type == TLSEXT_TYPE_server_name) |
1954 | { | |
1955 | if (s->tlsext_hostname == NULL || size > 0) | |
1956 | { | |
1957 | *al = TLS1_AD_UNRECOGNIZED_NAME; | |
1958 | return 0; | |
1959 | } | |
ed3883d2 | 1960 | tlsext_servername = 1; |
f1fd4544 | 1961 | } |
ed3883d2 | 1962 | |
36ca4ba6 | 1963 | #ifndef OPENSSL_NO_EC |
8025e251 DSH |
1964 | else if (type == TLSEXT_TYPE_ec_point_formats && |
1965 | s->version != DTLS1_VERSION) | |
36ca4ba6 BM |
1966 | { |
1967 | unsigned char *sdata = data; | |
1968 | int ecpointformatlist_length = *(sdata++); | |
36ca4ba6 BM |
1969 | |
1970 | if (ecpointformatlist_length != size - 1) | |
1971 | { | |
1972 | *al = TLS1_AD_DECODE_ERROR; | |
1973 | return 0; | |
1974 | } | |
1975 | s->session->tlsext_ecpointformatlist_length = 0; | |
b6acb8d0 | 1976 | if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist); |
36ca4ba6 BM |
1977 | if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL) |
1978 | { | |
1979 | *al = TLS1_AD_INTERNAL_ERROR; | |
1980 | return 0; | |
1981 | } | |
1982 | s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length; | |
1983 | memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length); | |
1984 | #if 0 | |
1985 | fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist "); | |
1986 | sdata = s->session->tlsext_ecpointformatlist; | |
1987 | for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++) | |
1988 | fprintf(stderr,"%i ",*(sdata++)); | |
1989 | fprintf(stderr,"\n"); | |
1990 | #endif | |
1991 | } | |
c6a27f01 | 1992 | #endif /* OPENSSL_NO_EC */ |
6434abbf DSH |
1993 | |
1994 | else if (type == TLSEXT_TYPE_session_ticket) | |
1995 | { | |
12bf56c0 DSH |
1996 | if (s->tls_session_ticket_ext_cb && |
1997 | !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg)) | |
1998 | { | |
1999 | *al = TLS1_AD_INTERNAL_ERROR; | |
2000 | return 0; | |
2001 | } | |
6434abbf DSH |
2002 | if ((SSL_get_options(s) & SSL_OP_NO_TICKET) |
2003 | || (size > 0)) | |
2004 | { | |
2005 | *al = TLS1_AD_UNSUPPORTED_EXTENSION; | |
2006 | return 0; | |
2007 | } | |
2008 | s->tlsext_ticket_expected = 1; | |
2009 | } | |
761772d7 | 2010 | #ifdef TLSEXT_TYPE_opaque_prf_input |
8025e251 DSH |
2011 | else if (type == TLSEXT_TYPE_opaque_prf_input && |
2012 | s->version != DTLS1_VERSION) | |
761772d7 BM |
2013 | { |
2014 | unsigned char *sdata = data; | |
2015 | ||
2016 | if (size < 2) | |
2017 | { | |
2018 | *al = SSL_AD_DECODE_ERROR; | |
2019 | return 0; | |
2020 | } | |
2021 | n2s(sdata, s->s3->server_opaque_prf_input_len); | |
2022 | if (s->s3->server_opaque_prf_input_len != size - 2) | |
2023 | { | |
2024 | *al = SSL_AD_DECODE_ERROR; | |
2025 | return 0; | |
2026 | } | |
2027 | ||
2028 | if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */ | |
2029 | OPENSSL_free(s->s3->server_opaque_prf_input); | |
02c27b11 BM |
2030 | if (s->s3->server_opaque_prf_input_len == 0) |
2031 | s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */ | |
2032 | else | |
2033 | s->s3->server_opaque_prf_input = BUF_memdup(sdata, s->s3->server_opaque_prf_input_len); | |
761772d7 BM |
2034 | |
2035 | if (s->s3->server_opaque_prf_input == NULL) | |
2036 | { | |
2037 | *al = TLS1_AD_INTERNAL_ERROR; | |
2038 | return 0; | |
2039 | } | |
2040 | } | |
2041 | #endif | |
8025e251 DSH |
2042 | else if (type == TLSEXT_TYPE_status_request && |
2043 | s->version != DTLS1_VERSION) | |
67c8e7f4 DSH |
2044 | { |
2045 | /* MUST be empty and only sent if we've requested | |
2046 | * a status request message. | |
2047 | */ | |
2048 | if ((s->tlsext_status_type == -1) || (size > 0)) | |
2049 | { | |
2050 | *al = TLS1_AD_UNSUPPORTED_EXTENSION; | |
2051 | return 0; | |
2052 | } | |
2053 | /* Set flag to expect CertificateStatus message */ | |
2054 | s->tlsext_status_expected = 1; | |
2055 | } | |
bf48836c | 2056 | #ifndef OPENSSL_NO_NEXTPROTONEG |
6f31dd72 BM |
2057 | else if (type == TLSEXT_TYPE_next_proto_neg && |
2058 | s->s3->tmp.finish_md_len == 0) | |
ee2ffc27 BL |
2059 | { |
2060 | unsigned char *selected; | |
2061 | unsigned char selected_len; | |
2062 | ||
2063 | /* We must have requested it. */ | |
2064 | if ((s->ctx->next_proto_select_cb == NULL)) | |
2065 | { | |
2066 | *al = TLS1_AD_UNSUPPORTED_EXTENSION; | |
2067 | return 0; | |
2068 | } | |
2069 | /* The data must be valid */ | |
2070 | if (!ssl_next_proto_validate(data, size)) | |
2071 | { | |
2072 | *al = TLS1_AD_DECODE_ERROR; | |
2073 | return 0; | |
2074 | } | |
2075 | if (s->ctx->next_proto_select_cb(s, &selected, &selected_len, data, size, s->ctx->next_proto_select_cb_arg) != SSL_TLSEXT_ERR_OK) | |
2076 | { | |
2077 | *al = TLS1_AD_INTERNAL_ERROR; | |
2078 | return 0; | |
2079 | } | |
2080 | s->next_proto_negotiated = OPENSSL_malloc(selected_len); | |
2081 | if (!s->next_proto_negotiated) | |
2082 | { | |
2083 | *al = TLS1_AD_INTERNAL_ERROR; | |
2084 | return 0; | |
2085 | } | |
2086 | memcpy(s->next_proto_negotiated, selected, selected_len); | |
2087 | s->next_proto_negotiated_len = selected_len; | |
6f31dd72 | 2088 | s->s3->next_proto_neg_seen = 1; |
ee2ffc27 BL |
2089 | } |
2090 | #endif | |
860c3dd1 DSH |
2091 | else if (type == TLSEXT_TYPE_renegotiate) |
2092 | { | |
2093 | if(!ssl_parse_serverhello_renegotiate_ext(s, data, size, al)) | |
2094 | return 0; | |
2095 | renegotiate_seen = 1; | |
2096 | } | |
4817504d DSH |
2097 | #ifndef OPENSSL_NO_HEARTBEATS |
2098 | else if (type == TLSEXT_TYPE_heartbeat) | |
2099 | { | |
2100 | switch(data[0]) | |
2101 | { | |
2102 | case 0x01: /* Server allows us to send HB requests */ | |
2103 | s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED; | |
2104 | break; | |
2105 | case 0x02: /* Server doesn't accept HB requests */ | |
2106 | s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED; | |
2107 | s->tlsext_heartbeat |= SSL_TLSEXT_HB_DONT_SEND_REQUESTS; | |
2108 | break; | |
192540b5 DSH |
2109 | default: *al = SSL_AD_ILLEGAL_PARAMETER; |
2110 | return 0; | |
4817504d DSH |
2111 | } |
2112 | } | |
2113 | #endif | |
333f926d BL |
2114 | else if (type == TLSEXT_TYPE_use_srtp) |
2115 | { | |
2116 | if(ssl_parse_serverhello_use_srtp_ext(s, data, size, | |
2117 | al)) | |
2118 | return 0; | |
2119 | } | |
2120 | ||
a9e1c50b BL |
2121 | else if (type == TLSEXT_TYPE_server_authz) |
2122 | { | |
2123 | /* We only support audit proofs. It's an error to send | |
2124 | * an authz hello extension if the client | |
2125 | * didn't request a proof. */ | |
2126 | unsigned char *sdata = data; | |
2127 | unsigned char server_authz_dataformatlist_length; | |
2128 | ||
2129 | if (!s->ctx->tlsext_authz_server_audit_proof_cb) | |
2130 | { | |
2131 | *al = TLS1_AD_UNSUPPORTED_EXTENSION; | |
2132 | return 0; | |
2133 | } | |
2134 | ||
2135 | if (!size) | |
2136 | { | |
2137 | *al = TLS1_AD_DECODE_ERROR; | |
2138 | return 0; | |
2139 | } | |
2140 | ||
2141 | server_authz_dataformatlist_length = *(sdata++); | |
2142 | if (server_authz_dataformatlist_length != size - 1) | |
2143 | { | |
2144 | *al = TLS1_AD_DECODE_ERROR; | |
2145 | return 0; | |
2146 | } | |
2147 | ||
2148 | /* We only support audit proofs, so a legal ServerHello | |
2149 | * authz list contains exactly one entry. */ | |
2150 | if (server_authz_dataformatlist_length != 1 || | |
2151 | sdata[0] != TLSEXT_AUTHZDATAFORMAT_audit_proof) | |
2152 | { | |
2153 | *al = TLS1_AD_UNSUPPORTED_EXTENSION; | |
2154 | return 0; | |
2155 | } | |
2156 | ||
2157 | s->s3->tlsext_authz_server_promised = 1; | |
2158 | } | |
2159 | ||
2160 | data += size; | |
f1fd4544 | 2161 | } |
ed3883d2 BM |
2162 | |
2163 | if (data != d+n) | |
f1fd4544 BM |
2164 | { |
2165 | *al = SSL_AD_DECODE_ERROR; | |
2166 | return 0; | |
2167 | } | |
ed3883d2 | 2168 | |
f1fd4544 BM |
2169 | if (!s->hit && tlsext_servername == 1) |
2170 | { | |
2171 | if (s->tlsext_hostname) | |
2172 | { | |
2173 | if (s->session->tlsext_hostname == NULL) | |
2174 | { | |
ed3883d2 BM |
2175 | s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname); |
2176 | if (!s->session->tlsext_hostname) | |
f1fd4544 BM |
2177 | { |
2178 | *al = SSL_AD_UNRECOGNIZED_NAME; | |
2179 | return 0; | |
2180 | } | |
2181 | } | |
2182 | else | |
2183 | { | |
2184 | *al = SSL_AD_DECODE_ERROR; | |
2185 | return 0; | |
2186 | } | |
ed3883d2 | 2187 | } |
f1fd4544 | 2188 | } |
ed3883d2 | 2189 | |
f1fd4544 | 2190 | *p = data; |
c27c9cb4 DSH |
2191 | |
2192 | ri_check: | |
2193 | ||
2194 | /* Determine if we need to see RI. Strictly speaking if we want to | |
2195 | * avoid an attack we should *always* see RI even on initial server | |
2196 | * hello because the client doesn't see any renegotiation during an | |
2197 | * attack. However this would mean we could not connect to any server | |
2198 | * which doesn't support RI so for the immediate future tolerate RI | |
2199 | * absence on initial connect only. | |
2200 | */ | |
c2c49969 DSH |
2201 | if (!renegotiate_seen |
2202 | && !(s->options & SSL_OP_LEGACY_SERVER_CONNECT) | |
ef51b4b9 | 2203 | && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) |
c27c9cb4 | 2204 | { |
fbed9f81 | 2205 | *al = SSL_AD_HANDSHAKE_FAILURE; |
09e4e4b9 | 2206 | SSLerr(SSL_F_SSL_SCAN_SERVERHELLO_TLSEXT, |
c27c9cb4 DSH |
2207 | SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED); |
2208 | return 0; | |
2209 | } | |
2210 | ||
f1fd4544 | 2211 | return 1; |
52b8dad8 | 2212 | } |
ed3883d2 | 2213 | |
b2172f4f | 2214 | |
36ca4ba6 BM |
2215 | int ssl_prepare_clienthello_tlsext(SSL *s) |
2216 | { | |
761772d7 BM |
2217 | |
2218 | #ifdef TLSEXT_TYPE_opaque_prf_input | |
2219 | { | |
2220 | int r = 1; | |
2221 | ||
2222 | if (s->ctx->tlsext_opaque_prf_input_callback != 0) | |
2223 | { | |
2224 | r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg); | |
2225 | if (!r) | |
2226 | return -1; | |
2227 | } | |
2228 | ||
2229 | if (s->tlsext_opaque_prf_input != NULL) | |
2230 | { | |
2231 | if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */ | |
2232 | OPENSSL_free(s->s3->client_opaque_prf_input); | |
2233 | ||
02c27b11 BM |
2234 | if (s->tlsext_opaque_prf_input_len == 0) |
2235 | s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */ | |
2236 | else | |
2237 | s->s3->client_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len); | |
761772d7 BM |
2238 | if (s->s3->client_opaque_prf_input == NULL) |
2239 | { | |
2240 | SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE); | |
2241 | return -1; | |
2242 | } | |
2243 | s->s3->client_opaque_prf_input_len = s->tlsext_opaque_prf_input_len; | |
2244 | } | |
2245 | ||
2246 | if (r == 2) | |
2247 | /* at callback's request, insist on receiving an appropriate server opaque PRF input */ | |
2248 | s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len; | |
2249 | } | |
2250 | #endif | |
2251 | ||
36ca4ba6 | 2252 | return 1; |
52b8dad8 | 2253 | } |
36ca4ba6 BM |
2254 | |
2255 | int ssl_prepare_serverhello_tlsext(SSL *s) | |
2256 | { | |
2257 | #ifndef OPENSSL_NO_EC | |
b6acb8d0 | 2258 | /* If we are server and using an ECC cipher suite, send the point formats we support |
33273721 BM |
2259 | * if the client sent us an ECPointsFormat extension. Note that the server is not |
2260 | * supposed to send an EllipticCurves extension. | |
36ca4ba6 | 2261 | */ |
36ca4ba6 | 2262 | |
52b8dad8 BM |
2263 | unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2264 | unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
2265 | int using_ecc = (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA); | |
2266 | using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL); | |
2267 | ||
36ca4ba6 BM |
2268 | if (using_ecc) |
2269 | { | |
b6acb8d0 BM |
2270 | if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist); |
2271 | if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL) | |
36ca4ba6 | 2272 | { |
a291745e | 2273 | SSLerr(SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE); |
36ca4ba6 BM |
2274 | return -1; |
2275 | } | |
b6acb8d0 BM |
2276 | s->tlsext_ecpointformatlist_length = 3; |
2277 | s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed; | |
2278 | s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime; | |
2279 | s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2; | |
36ca4ba6 BM |
2280 | } |
2281 | #endif /* OPENSSL_NO_EC */ | |
761772d7 | 2282 | |
36ca4ba6 | 2283 | return 1; |
52b8dad8 | 2284 | } |
36ca4ba6 | 2285 | |
09e4e4b9 | 2286 | static int ssl_check_clienthello_tlsext(SSL *s) |
f1fd4544 | 2287 | { |
241520e6 | 2288 | int ret=SSL_TLSEXT_ERR_NOACK; |
36ca4ba6 BM |
2289 | int al = SSL_AD_UNRECOGNIZED_NAME; |
2290 | ||
2291 | #ifndef OPENSSL_NO_EC | |
33273721 BM |
2292 | /* The handling of the ECPointFormats extension is done elsewhere, namely in |
2293 | * ssl3_choose_cipher in s3_lib.c. | |
2294 | */ | |
2295 | /* The handling of the EllipticCurves extension is done elsewhere, namely in | |
2296 | * ssl3_choose_cipher in s3_lib.c. | |
36ca4ba6 BM |
2297 | */ |
2298 | #endif | |
2299 | ||
2300 | if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0) | |
2301 | ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg); | |
2302 | else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0) | |
2303 | ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg); | |
2304 | ||
67c8e7f4 DSH |
2305 | /* If status request then ask callback what to do. |
2306 | * Note: this must be called after servername callbacks in case | |
2307 | * the certificate has changed. | |
2308 | */ | |
2bd45dc9 | 2309 | if ((s->tlsext_status_type != -1) && s->ctx && s->ctx->tlsext_status_cb) |
67c8e7f4 DSH |
2310 | { |
2311 | int r; | |
2312 | r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); | |
2313 | switch (r) | |
2314 | { | |
2315 | /* We don't want to send a status request response */ | |
2316 | case SSL_TLSEXT_ERR_NOACK: | |
2317 | s->tlsext_status_expected = 0; | |
2318 | break; | |
2319 | /* status request response should be sent */ | |
2320 | case SSL_TLSEXT_ERR_OK: | |
2321 | if (s->tlsext_ocsp_resp) | |
2322 | s->tlsext_status_expected = 1; | |
2323 | else | |
2324 | s->tlsext_status_expected = 0; | |
2325 | break; | |
2326 | /* something bad happened */ | |
2327 | case SSL_TLSEXT_ERR_ALERT_FATAL: | |
2328 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
2329 | al = SSL_AD_INTERNAL_ERROR; | |
2330 | goto err; | |
2331 | } | |
2332 | } | |
2333 | else | |
2334 | s->tlsext_status_expected = 0; | |
761772d7 BM |
2335 | |
2336 | #ifdef TLSEXT_TYPE_opaque_prf_input | |
2337 | { | |
2338 | /* This sort of belongs into ssl_prepare_serverhello_tlsext(), | |
2339 | * but we might be sending an alert in response to the client hello, | |
2340 | * so this has to happen here in ssl_check_clienthello_tlsext(). */ | |
2341 | ||
2342 | int r = 1; | |
2343 | ||
2344 | if (s->ctx->tlsext_opaque_prf_input_callback != 0) | |
2345 | { | |
2346 | r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg); | |
2347 | if (!r) | |
2348 | { | |
2349 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
2350 | al = SSL_AD_INTERNAL_ERROR; | |
2351 | goto err; | |
2352 | } | |
2353 | } | |
2354 | ||
2355 | if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */ | |
2356 | OPENSSL_free(s->s3->server_opaque_prf_input); | |
2357 | s->s3->server_opaque_prf_input = NULL; | |
2358 | ||
2359 | if (s->tlsext_opaque_prf_input != NULL) | |
2360 | { | |
2361 | if (s->s3->client_opaque_prf_input != NULL && | |
2362 | s->s3->client_opaque_prf_input_len == s->tlsext_opaque_prf_input_len) | |
2363 | { | |
2364 | /* can only use this extension if we have a server opaque PRF input | |
2365 | * of the same length as the client opaque PRF input! */ | |
2366 | ||
02c27b11 BM |
2367 | if (s->tlsext_opaque_prf_input_len == 0) |
2368 | s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */ | |
2369 | else | |
2370 | s->s3->server_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len); | |
761772d7 BM |
2371 | if (s->s3->server_opaque_prf_input == NULL) |
2372 | { | |
2373 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
2374 | al = SSL_AD_INTERNAL_ERROR; | |
2375 | goto err; | |
2376 | } | |
2377 | s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len; | |
2378 | } | |
2379 | } | |
2380 | ||
2381 | if (r == 2 && s->s3->server_opaque_prf_input == NULL) | |
2382 | { | |
2383 | /* The callback wants to enforce use of the extension, | |
2384 | * but we can't do that with the client opaque PRF input; | |
2385 | * abort the handshake. | |
2386 | */ | |
2387 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
2388 | al = SSL_AD_HANDSHAKE_FAILURE; | |
2389 | } | |
2390 | } | |
761772d7 | 2391 | |
67c8e7f4 | 2392 | #endif |
761772d7 | 2393 | err: |
52b8dad8 BM |
2394 | switch (ret) |
2395 | { | |
36ca4ba6 BM |
2396 | case SSL_TLSEXT_ERR_ALERT_FATAL: |
2397 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
2398 | return -1; | |
2399 | ||
2400 | case SSL_TLSEXT_ERR_ALERT_WARNING: | |
2401 | ssl3_send_alert(s,SSL3_AL_WARNING,al); | |
2402 | return 1; | |
2403 | ||
2404 | case SSL_TLSEXT_ERR_NOACK: | |
2405 | s->servername_done=0; | |
2406 | default: | |
2407 | return 1; | |
52b8dad8 | 2408 | } |
36ca4ba6 | 2409 | } |
f1fd4544 | 2410 | |
36ca4ba6 BM |
2411 | int ssl_check_serverhello_tlsext(SSL *s) |
2412 | { | |
2413 | int ret=SSL_TLSEXT_ERR_NOACK; | |
58ece833 | 2414 | int al = SSL_AD_UNRECOGNIZED_NAME; |
241520e6 | 2415 | |
36ca4ba6 | 2416 | #ifndef OPENSSL_NO_EC |
d0205686 DSH |
2417 | /* If we are client and using an elliptic curve cryptography cipher |
2418 | * suite, then if server returns an EC point formats lists extension | |
2419 | * it must contain uncompressed. | |
36ca4ba6 | 2420 | */ |
52b8dad8 BM |
2421 | unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2422 | unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
36ca4ba6 | 2423 | if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) && |
d0205686 | 2424 | (s->session->tlsext_ecpointformatlist != NULL) && (s->session->tlsext_ecpointformatlist_length > 0) && |
52b8dad8 | 2425 | ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA))) |
36ca4ba6 BM |
2426 | { |
2427 | /* we are using an ECC cipher */ | |
90bdfd97 | 2428 | size_t i; |
36ca4ba6 BM |
2429 | unsigned char *list; |
2430 | int found_uncompressed = 0; | |
b9865f11 | 2431 | list = s->session->tlsext_ecpointformatlist; |
36ca4ba6 BM |
2432 | for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++) |
2433 | { | |
2434 | if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed) | |
2435 | { | |
2436 | found_uncompressed = 1; | |
2437 | break; | |
2438 | } | |
2439 | } | |
2440 | if (!found_uncompressed) | |
2441 | { | |
a291745e | 2442 | SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST); |
36ca4ba6 BM |
2443 | return -1; |
2444 | } | |
2445 | } | |
2446 | ret = SSL_TLSEXT_ERR_OK; | |
2447 | #endif /* OPENSSL_NO_EC */ | |
2448 | ||
241520e6 | 2449 | if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0) |
58ece833 | 2450 | ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg); |
241520e6 | 2451 | else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0) |
58ece833 | 2452 | ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg); |
241520e6 | 2453 | |
761772d7 BM |
2454 | #ifdef TLSEXT_TYPE_opaque_prf_input |
2455 | if (s->s3->server_opaque_prf_input_len > 0) | |
2456 | { | |
2457 | /* This case may indicate that we, as a client, want to insist on using opaque PRF inputs. | |
2458 | * So first verify that we really have a value from the server too. */ | |
2459 | ||
2460 | if (s->s3->server_opaque_prf_input == NULL) | |
2461 | { | |
2462 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
2463 | al = SSL_AD_HANDSHAKE_FAILURE; | |
2464 | } | |
2465 | ||
2466 | /* Anytime the server *has* sent an opaque PRF input, we need to check | |
2467 | * that we have a client opaque PRF input of the same size. */ | |
2468 | if (s->s3->client_opaque_prf_input == NULL || | |
2469 | s->s3->client_opaque_prf_input_len != s->s3->server_opaque_prf_input_len) | |
2470 | { | |
2471 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
2472 | al = SSL_AD_ILLEGAL_PARAMETER; | |
2473 | } | |
2474 | } | |
2475 | #endif | |
2476 | ||
04e2ab2c DSH |
2477 | /* If we've requested certificate status and we wont get one |
2478 | * tell the callback | |
2479 | */ | |
2480 | if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected) | |
121f9e74 | 2481 | && s->ctx && s->ctx->tlsext_status_cb) |
04e2ab2c DSH |
2482 | { |
2483 | int r; | |
2484 | /* Set resp to NULL, resplen to -1 so callback knows | |
2485 | * there is no response. | |
2486 | */ | |
2487 | if (s->tlsext_ocsp_resp) | |
2488 | { | |
2489 | OPENSSL_free(s->tlsext_ocsp_resp); | |
2490 | s->tlsext_ocsp_resp = NULL; | |
2491 | } | |
2492 | s->tlsext_ocsp_resplen = -1; | |
2493 | r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); | |
2494 | if (r == 0) | |
2495 | { | |
2496 | al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; | |
2497 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
2498 | } | |
2499 | if (r < 0) | |
2500 | { | |
2501 | al = SSL_AD_INTERNAL_ERROR; | |
2502 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
2503 | } | |
2504 | } | |
2505 | ||
52b8dad8 BM |
2506 | switch (ret) |
2507 | { | |
58ece833 BM |
2508 | case SSL_TLSEXT_ERR_ALERT_FATAL: |
2509 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
2510 | return -1; | |
2511 | ||
2512 | case SSL_TLSEXT_ERR_ALERT_WARNING: | |
2513 | ssl3_send_alert(s,SSL3_AL_WARNING,al); | |
2514 | return 1; | |
2515 | ||
2516 | case SSL_TLSEXT_ERR_NOACK: | |
2517 | s->servername_done=0; | |
2518 | default: | |
2519 | return 1; | |
52b8dad8 | 2520 | } |
f1fd4544 | 2521 | } |
33273721 | 2522 | |
09e4e4b9 DSH |
2523 | int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n) |
2524 | { | |
2525 | int al = -1; | |
2526 | if (s->version < SSL3_VERSION) | |
2527 | return 1; | |
2528 | if (ssl_scan_serverhello_tlsext(s, p, d, n, &al) <= 0) | |
2529 | { | |
2530 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
2531 | return 0; | |
2532 | } | |
2533 | ||
2534 | if (ssl_check_serverhello_tlsext(s) <= 0) | |
2535 | { | |
2536 | SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT,SSL_R_SERVERHELLO_TLSEXT); | |
2537 | return 0; | |
2538 | } | |
2539 | return 1; | |
2540 | } | |
2541 | ||
c519e89f BM |
2542 | /* Since the server cache lookup is done early on in the processing of the |
2543 | * ClientHello, and other operations depend on the result, we need to handle | |
2544 | * any TLS session ticket extension at the same time. | |
2545 | * | |
2546 | * session_id: points at the session ID in the ClientHello. This code will | |
2547 | * read past the end of this in order to parse out the session ticket | |
2548 | * extension, if any. | |
2549 | * len: the length of the session ID. | |
2550 | * limit: a pointer to the first byte after the ClientHello. | |
2551 | * ret: (output) on return, if a ticket was decrypted, then this is set to | |
2552 | * point to the resulting session. | |
2553 | * | |
2554 | * If s->tls_session_secret_cb is set then we are expecting a pre-shared key | |
2555 | * ciphersuite, in which case we have no use for session tickets and one will | |
2556 | * never be decrypted, nor will s->tlsext_ticket_expected be set to 1. | |
2557 | * | |
2558 | * Returns: | |
2559 | * -1: fatal error, either from parsing or decrypting the ticket. | |
2560 | * 0: no ticket was found (or was ignored, based on settings). | |
2561 | * 1: a zero length extension was found, indicating that the client supports | |
2562 | * session tickets but doesn't currently have one to offer. | |
2563 | * 2: either s->tls_session_secret_cb was set, or a ticket was offered but | |
2564 | * couldn't be decrypted because of a non-fatal error. | |
2565 | * 3: a ticket was successfully decrypted and *ret was set. | |
2566 | * | |
2567 | * Side effects: | |
2568 | * Sets s->tlsext_ticket_expected to 1 if the server will have to issue | |
2569 | * a new session ticket to the client because the client indicated support | |
2570 | * (and s->tls_session_secret_cb is NULL) but the client either doesn't have | |
2571 | * a session ticket or we couldn't use the one it gave us, or if | |
2572 | * s->ctx->tlsext_ticket_key_cb asked to renew the client's ticket. | |
2573 | * Otherwise, s->tlsext_ticket_expected is set to 0. | |
6434abbf | 2574 | */ |
6434abbf | 2575 | int tls1_process_ticket(SSL *s, unsigned char *session_id, int len, |
c519e89f | 2576 | const unsigned char *limit, SSL_SESSION **ret) |
6434abbf DSH |
2577 | { |
2578 | /* Point after session ID in client hello */ | |
2579 | const unsigned char *p = session_id + len; | |
2580 | unsigned short i; | |
e8da6a1d | 2581 | |
c519e89f BM |
2582 | *ret = NULL; |
2583 | s->tlsext_ticket_expected = 0; | |
2584 | ||
e8da6a1d | 2585 | /* If tickets disabled behave as if no ticket present |
c519e89f BM |
2586 | * to permit stateful resumption. |
2587 | */ | |
e8da6a1d | 2588 | if (SSL_get_options(s) & SSL_OP_NO_TICKET) |
c519e89f | 2589 | return 0; |
6434abbf | 2590 | if ((s->version <= SSL3_VERSION) || !limit) |
c519e89f | 2591 | return 0; |
6434abbf DSH |
2592 | if (p >= limit) |
2593 | return -1; | |
07a9d1a2 DSH |
2594 | /* Skip past DTLS cookie */ |
2595 | if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER) | |
2596 | { | |
2597 | i = *(p++); | |
2598 | p+= i; | |
2599 | if (p >= limit) | |
2600 | return -1; | |
2601 | } | |
6434abbf DSH |
2602 | /* Skip past cipher list */ |
2603 | n2s(p, i); | |
2604 | p+= i; | |
2605 | if (p >= limit) | |
2606 | return -1; | |
2607 | /* Skip past compression algorithm list */ | |
2608 | i = *(p++); | |
2609 | p += i; | |
2610 | if (p > limit) | |
2611 | return -1; | |
2612 | /* Now at start of extensions */ | |
2613 | if ((p + 2) >= limit) | |
c519e89f | 2614 | return 0; |
6434abbf DSH |
2615 | n2s(p, i); |
2616 | while ((p + 4) <= limit) | |
2617 | { | |
2618 | unsigned short type, size; | |
2619 | n2s(p, type); | |
2620 | n2s(p, size); | |
2621 | if (p + size > limit) | |
c519e89f | 2622 | return 0; |
6434abbf DSH |
2623 | if (type == TLSEXT_TYPE_session_ticket) |
2624 | { | |
c519e89f | 2625 | int r; |
6434abbf DSH |
2626 | if (size == 0) |
2627 | { | |
c519e89f BM |
2628 | /* The client will accept a ticket but doesn't |
2629 | * currently have one. */ | |
6434abbf | 2630 | s->tlsext_ticket_expected = 1; |
c519e89f | 2631 | return 1; |
6434abbf | 2632 | } |
12bf56c0 DSH |
2633 | if (s->tls_session_secret_cb) |
2634 | { | |
c519e89f BM |
2635 | /* Indicate that the ticket couldn't be |
2636 | * decrypted rather than generating the session | |
2637 | * from ticket now, trigger abbreviated | |
2638 | * handshake based on external mechanism to | |
2639 | * calculate the master secret later. */ | |
2640 | return 2; | |
2641 | } | |
2642 | r = tls_decrypt_ticket(s, p, size, session_id, len, ret); | |
2643 | switch (r) | |
2644 | { | |
2645 | case 2: /* ticket couldn't be decrypted */ | |
2646 | s->tlsext_ticket_expected = 1; | |
2647 | return 2; | |
2648 | case 3: /* ticket was decrypted */ | |
2649 | return r; | |
2650 | case 4: /* ticket decrypted but need to renew */ | |
2651 | s->tlsext_ticket_expected = 1; | |
2652 | return 3; | |
2653 | default: /* fatal error */ | |
2654 | return -1; | |
12bf56c0 | 2655 | } |
6434abbf DSH |
2656 | } |
2657 | p += size; | |
2658 | } | |
c519e89f | 2659 | return 0; |
6434abbf DSH |
2660 | } |
2661 | ||
c519e89f BM |
2662 | /* tls_decrypt_ticket attempts to decrypt a session ticket. |
2663 | * | |
2664 | * etick: points to the body of the session ticket extension. | |
2665 | * eticklen: the length of the session tickets extenion. | |
2666 | * sess_id: points at the session ID. | |
2667 | * sesslen: the length of the session ID. | |
2668 | * psess: (output) on return, if a ticket was decrypted, then this is set to | |
2669 | * point to the resulting session. | |
2670 | * | |
2671 | * Returns: | |
2672 | * -1: fatal error, either from parsing or decrypting the ticket. | |
2673 | * 2: the ticket couldn't be decrypted. | |
2674 | * 3: a ticket was successfully decrypted and *psess was set. | |
2675 | * 4: same as 3, but the ticket needs to be renewed. | |
2676 | */ | |
6434abbf DSH |
2677 | static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen, |
2678 | const unsigned char *sess_id, int sesslen, | |
2679 | SSL_SESSION **psess) | |
2680 | { | |
2681 | SSL_SESSION *sess; | |
2682 | unsigned char *sdec; | |
2683 | const unsigned char *p; | |
8a2062fe | 2684 | int slen, mlen, renew_ticket = 0; |
6434abbf DSH |
2685 | unsigned char tick_hmac[EVP_MAX_MD_SIZE]; |
2686 | HMAC_CTX hctx; | |
2687 | EVP_CIPHER_CTX ctx; | |
661dc143 | 2688 | SSL_CTX *tctx = s->initial_ctx; |
8a2062fe DSH |
2689 | /* Need at least keyname + iv + some encrypted data */ |
2690 | if (eticklen < 48) | |
c519e89f | 2691 | return 2; |
8a2062fe DSH |
2692 | /* Initialize session ticket encryption and HMAC contexts */ |
2693 | HMAC_CTX_init(&hctx); | |
2694 | EVP_CIPHER_CTX_init(&ctx); | |
661dc143 | 2695 | if (tctx->tlsext_ticket_key_cb) |
8a2062fe DSH |
2696 | { |
2697 | unsigned char *nctick = (unsigned char *)etick; | |
661dc143 | 2698 | int rv = tctx->tlsext_ticket_key_cb(s, nctick, nctick + 16, |
8a2062fe DSH |
2699 | &ctx, &hctx, 0); |
2700 | if (rv < 0) | |
2701 | return -1; | |
2702 | if (rv == 0) | |
c519e89f | 2703 | return 2; |
8a2062fe DSH |
2704 | if (rv == 2) |
2705 | renew_ticket = 1; | |
2706 | } | |
2707 | else | |
2708 | { | |
2709 | /* Check key name matches */ | |
661dc143 | 2710 | if (memcmp(etick, tctx->tlsext_tick_key_name, 16)) |
c519e89f | 2711 | return 2; |
661dc143 | 2712 | HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16, |
8a2062fe DSH |
2713 | tlsext_tick_md(), NULL); |
2714 | EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL, | |
661dc143 | 2715 | tctx->tlsext_tick_aes_key, etick + 16); |
8a2062fe | 2716 | } |
6434abbf | 2717 | /* Attempt to process session ticket, first conduct sanity and |
c519e89f BM |
2718 | * integrity checks on ticket. |
2719 | */ | |
8a2062fe | 2720 | mlen = HMAC_size(&hctx); |
0eab41fb BL |
2721 | if (mlen < 0) |
2722 | { | |
2723 | EVP_CIPHER_CTX_cleanup(&ctx); | |
2724 | return -1; | |
2725 | } | |
6434abbf | 2726 | eticklen -= mlen; |
6434abbf | 2727 | /* Check HMAC of encrypted ticket */ |
6434abbf DSH |
2728 | HMAC_Update(&hctx, etick, eticklen); |
2729 | HMAC_Final(&hctx, tick_hmac, NULL); | |
2730 | HMAC_CTX_cleanup(&hctx); | |
2731 | if (memcmp(tick_hmac, etick + eticklen, mlen)) | |
c519e89f | 2732 | return 2; |
6434abbf | 2733 | /* Attempt to decrypt session data */ |
6434abbf | 2734 | /* Move p after IV to start of encrypted ticket, update length */ |
8a2062fe DSH |
2735 | p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx); |
2736 | eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx); | |
6434abbf DSH |
2737 | sdec = OPENSSL_malloc(eticklen); |
2738 | if (!sdec) | |
2739 | { | |
2740 | EVP_CIPHER_CTX_cleanup(&ctx); | |
2741 | return -1; | |
2742 | } | |
2743 | EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen); | |
2744 | if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0) | |
c519e89f | 2745 | return 2; |
6434abbf DSH |
2746 | slen += mlen; |
2747 | EVP_CIPHER_CTX_cleanup(&ctx); | |
2748 | p = sdec; | |
c519e89f | 2749 | |
6434abbf DSH |
2750 | sess = d2i_SSL_SESSION(NULL, &p, slen); |
2751 | OPENSSL_free(sdec); | |
2752 | if (sess) | |
2753 | { | |
c519e89f BM |
2754 | /* The session ID, if non-empty, is used by some clients to |
2755 | * detect that the ticket has been accepted. So we copy it to | |
2756 | * the session structure. If it is empty set length to zero | |
2757 | * as required by standard. | |
2758 | */ | |
6434abbf DSH |
2759 | if (sesslen) |
2760 | memcpy(sess->session_id, sess_id, sesslen); | |
2761 | sess->session_id_length = sesslen; | |
2762 | *psess = sess; | |
c519e89f BM |
2763 | if (renew_ticket) |
2764 | return 4; | |
2765 | else | |
2766 | return 3; | |
6434abbf | 2767 | } |
c519e89f BM |
2768 | ERR_clear_error(); |
2769 | /* For session parse failure, indicate that we need to send a new | |
2770 | * ticket. */ | |
2771 | return 2; | |
6434abbf | 2772 | } |
6434abbf | 2773 | |
6b7be581 DSH |
2774 | /* Tables to translate from NIDs to TLS v1.2 ids */ |
2775 | ||
2776 | typedef struct | |
2777 | { | |
2778 | int nid; | |
2779 | int id; | |
2780 | } tls12_lookup; | |
2781 | ||
2782 | static tls12_lookup tls12_md[] = { | |
6b7be581 | 2783 | {NID_md5, TLSEXT_hash_md5}, |
6b7be581 | 2784 | {NID_sha1, TLSEXT_hash_sha1}, |
6b7be581 DSH |
2785 | {NID_sha224, TLSEXT_hash_sha224}, |
2786 | {NID_sha256, TLSEXT_hash_sha256}, | |
6b7be581 DSH |
2787 | {NID_sha384, TLSEXT_hash_sha384}, |
2788 | {NID_sha512, TLSEXT_hash_sha512} | |
6b7be581 DSH |
2789 | }; |
2790 | ||
2791 | static tls12_lookup tls12_sig[] = { | |
6b7be581 | 2792 | {EVP_PKEY_RSA, TLSEXT_signature_rsa}, |
6b7be581 | 2793 | {EVP_PKEY_DSA, TLSEXT_signature_dsa}, |
6b7be581 | 2794 | {EVP_PKEY_EC, TLSEXT_signature_ecdsa} |
6b7be581 DSH |
2795 | }; |
2796 | ||
2797 | static int tls12_find_id(int nid, tls12_lookup *table, size_t tlen) | |
2798 | { | |
2799 | size_t i; | |
2800 | for (i = 0; i < tlen; i++) | |
2801 | { | |
2802 | if (table[i].nid == nid) | |
2803 | return table[i].id; | |
2804 | } | |
2805 | return -1; | |
2806 | } | |
e7f8ff43 | 2807 | |
6b7be581 DSH |
2808 | static int tls12_find_nid(int id, tls12_lookup *table, size_t tlen) |
2809 | { | |
2810 | size_t i; | |
2811 | for (i = 0; i < tlen; i++) | |
2812 | { | |
e7f8ff43 | 2813 | if ((table[i].id) == id) |
6b7be581 DSH |
2814 | return table[i].nid; |
2815 | } | |
e7f8ff43 | 2816 | return NID_undef; |
6b7be581 | 2817 | } |
a2f9200f DSH |
2818 | |
2819 | int tls12_get_sigandhash(unsigned char *p, const EVP_PKEY *pk, const EVP_MD *md) | |
6b7be581 DSH |
2820 | { |
2821 | int sig_id, md_id; | |
1db5f356 DSH |
2822 | if (!md) |
2823 | return 0; | |
6b7be581 DSH |
2824 | md_id = tls12_find_id(EVP_MD_type(md), tls12_md, |
2825 | sizeof(tls12_md)/sizeof(tls12_lookup)); | |
2826 | if (md_id == -1) | |
2827 | return 0; | |
a2f9200f | 2828 | sig_id = tls12_get_sigid(pk); |
6b7be581 DSH |
2829 | if (sig_id == -1) |
2830 | return 0; | |
2831 | p[0] = (unsigned char)md_id; | |
2832 | p[1] = (unsigned char)sig_id; | |
2833 | return 1; | |
2834 | } | |
2835 | ||
a2f9200f DSH |
2836 | int tls12_get_sigid(const EVP_PKEY *pk) |
2837 | { | |
2838 | return tls12_find_id(pk->type, tls12_sig, | |
2839 | sizeof(tls12_sig)/sizeof(tls12_lookup)); | |
2840 | } | |
2841 | ||
2842 | const EVP_MD *tls12_get_hash(unsigned char hash_alg) | |
2843 | { | |
2844 | switch(hash_alg) | |
2845 | { | |
2846 | #ifndef OPENSSL_NO_MD5 | |
2847 | case TLSEXT_hash_md5: | |
ebc5e72f DSH |
2848 | #ifdef OPENSSL_FIPS |
2849 | if (FIPS_mode()) | |
2850 | return NULL; | |
2851 | #endif | |
a2f9200f DSH |
2852 | return EVP_md5(); |
2853 | #endif | |
2854 | #ifndef OPENSSL_NO_SHA | |
2855 | case TLSEXT_hash_sha1: | |
2856 | return EVP_sha1(); | |
2857 | #endif | |
2858 | #ifndef OPENSSL_NO_SHA256 | |
2859 | case TLSEXT_hash_sha224: | |
2860 | return EVP_sha224(); | |
2861 | ||
2862 | case TLSEXT_hash_sha256: | |
2863 | return EVP_sha256(); | |
2864 | #endif | |
2865 | #ifndef OPENSSL_NO_SHA512 | |
2866 | case TLSEXT_hash_sha384: | |
2867 | return EVP_sha384(); | |
2868 | ||
2869 | case TLSEXT_hash_sha512: | |
2870 | return EVP_sha512(); | |
2871 | #endif | |
2872 | default: | |
2873 | return NULL; | |
2874 | ||
2875 | } | |
2876 | } | |
2877 | ||
4453cd8c DSH |
2878 | static int tls12_get_pkey_idx(unsigned char sig_alg) |
2879 | { | |
2880 | switch(sig_alg) | |
2881 | { | |
2882 | #ifndef OPENSSL_NO_RSA | |
2883 | case TLSEXT_signature_rsa: | |
2884 | return SSL_PKEY_RSA_SIGN; | |
2885 | #endif | |
2886 | #ifndef OPENSSL_NO_DSA | |
2887 | case TLSEXT_signature_dsa: | |
2888 | return SSL_PKEY_DSA_SIGN; | |
2889 | #endif | |
2890 | #ifndef OPENSSL_NO_ECDSA | |
2891 | case TLSEXT_signature_ecdsa: | |
2892 | return SSL_PKEY_ECC; | |
2893 | #endif | |
2894 | } | |
2895 | return -1; | |
2896 | } | |
2897 | ||
2898 | /* Convert TLS 1.2 signature algorithm extension values into NIDs */ | |
2899 | static void tls1_lookup_sigalg(int *phash_nid, int *psign_nid, | |
2900 | int *psignhash_nid, const unsigned char *data) | |
2901 | { | |
2902 | int sign_nid, hash_nid; | |
2903 | if (!phash_nid && !psign_nid && !psignhash_nid) | |
2904 | return; | |
2905 | if (phash_nid || psignhash_nid) | |
2906 | { | |
2907 | hash_nid = tls12_find_nid(data[0], tls12_md, | |
2908 | sizeof(tls12_md)/sizeof(tls12_lookup)); | |
2909 | if (phash_nid) | |
2910 | *phash_nid = hash_nid; | |
2911 | } | |
2912 | if (psign_nid || psignhash_nid) | |
2913 | { | |
2914 | sign_nid = tls12_find_nid(data[1], tls12_sig, | |
2915 | sizeof(tls12_sig)/sizeof(tls12_lookup)); | |
2916 | if (psign_nid) | |
2917 | *psign_nid = sign_nid; | |
2918 | } | |
2919 | if (psignhash_nid) | |
2920 | { | |
2921 | if (sign_nid && hash_nid) | |
2922 | OBJ_find_sigid_by_algs(psignhash_nid, | |
2923 | hash_nid, sign_nid); | |
2924 | else | |
2925 | *psignhash_nid = NID_undef; | |
2926 | } | |
2927 | } | |
2928 | /* Given preference and allowed sigalgs set shared sigalgs */ | |
2929 | static int tls12_do_shared_sigalgs(TLS_SIGALGS *shsig, | |
2930 | const unsigned char *pref, size_t preflen, | |
2931 | const unsigned char *allow, size_t allowlen) | |
2932 | { | |
2933 | const unsigned char *ptmp, *atmp; | |
2934 | size_t i, j, nmatch = 0; | |
2935 | for (i = 0, ptmp = pref; i < preflen; i+=2, ptmp+=2) | |
2936 | { | |
2937 | /* Skip disabled hashes or signature algorithms */ | |
2938 | if (tls12_get_hash(ptmp[0]) == NULL) | |
2939 | continue; | |
2940 | if (tls12_get_pkey_idx(ptmp[1]) == -1) | |
2941 | continue; | |
2942 | for (j = 0, atmp = allow; j < allowlen; j+=2, atmp+=2) | |
2943 | { | |
2944 | if (ptmp[0] == atmp[0] && ptmp[1] == atmp[1]) | |
2945 | { | |
2946 | nmatch++; | |
2947 | if (shsig) | |
2948 | { | |
2949 | shsig->rhash = ptmp[0]; | |
2950 | shsig->rsign = ptmp[1]; | |
2951 | tls1_lookup_sigalg(&shsig->hash_nid, | |
2952 | &shsig->sign_nid, | |
2953 | &shsig->signandhash_nid, | |
2954 | ptmp); | |
2955 | shsig++; | |
2956 | } | |
2957 | break; | |
2958 | } | |
2959 | } | |
2960 | } | |
2961 | return nmatch; | |
2962 | } | |
2963 | ||
2964 | /* Set shared signature algorithms for SSL structures */ | |
2965 | static int tls1_set_shared_sigalgs(SSL *s) | |
2966 | { | |
2967 | const unsigned char *pref, *allow, *conf; | |
2968 | size_t preflen, allowlen, conflen; | |
2969 | size_t nmatch; | |
2970 | TLS_SIGALGS *salgs = NULL; | |
2971 | CERT *c = s->cert; | |
2972 | conf = c->conf_sigalgs; | |
2973 | if (conf) | |
2974 | conflen = c->conf_sigalgslen; | |
2975 | else | |
2976 | { | |
2977 | conf = tls12_sigalgs; | |
2978 | conflen = sizeof(tls12_sigalgs); | |
2979 | #ifdef OPENSSL_FIPS | |
2980 | if (FIPS_mode()) | |
2981 | conflen -= 2; | |
2982 | #endif | |
2983 | } | |
2984 | if(s->options & SSL_OP_CIPHER_SERVER_PREFERENCE) | |
2985 | { | |
2986 | pref = conf; | |
2987 | preflen = conflen; | |
2988 | allow = c->peer_sigalgs; | |
2989 | allowlen = c->peer_sigalgslen; | |
2990 | } | |
2991 | else | |
2992 | { | |
2993 | allow = conf; | |
2994 | allowlen = conflen; | |
2995 | pref = c->peer_sigalgs; | |
2996 | preflen = c->peer_sigalgslen; | |
2997 | } | |
2998 | nmatch = tls12_do_shared_sigalgs(NULL, pref, preflen, allow, allowlen); | |
2999 | if (!nmatch) | |
3000 | return 1; | |
3001 | salgs = OPENSSL_malloc(nmatch * sizeof(TLS_SIGALGS)); | |
3002 | if (!salgs) | |
3003 | return 0; | |
3004 | nmatch = tls12_do_shared_sigalgs(salgs, pref, preflen, allow, allowlen); | |
3005 | c->shared_sigalgs = salgs; | |
3006 | c->shared_sigalgslen = nmatch; | |
3007 | return 1; | |
3008 | } | |
3009 | ||
3010 | ||
6b7be581 DSH |
3011 | /* Set preferred digest for each key type */ |
3012 | ||
8f829124 | 3013 | int tls1_process_sigalgs(SSL *s, const unsigned char *data, int dsize) |
6b7be581 | 3014 | { |
4453cd8c DSH |
3015 | int idx; |
3016 | size_t i; | |
6b7be581 DSH |
3017 | const EVP_MD *md; |
3018 | CERT *c = s->cert; | |
e7f8ff43 | 3019 | TLS_SIGALGS *sigptr; |
6b7be581 | 3020 | /* Extension ignored for TLS versions below 1.2 */ |
238b6361 | 3021 | if (TLS1_get_version(s) < TLS1_2_VERSION) |
6b7be581 | 3022 | return 1; |
8f829124 DSH |
3023 | /* Should never happen */ |
3024 | if (!c) | |
3025 | return 0; | |
6b7be581 DSH |
3026 | |
3027 | c->pkeys[SSL_PKEY_DSA_SIGN].digest = NULL; | |
3028 | c->pkeys[SSL_PKEY_RSA_SIGN].digest = NULL; | |
3029 | c->pkeys[SSL_PKEY_RSA_ENC].digest = NULL; | |
3030 | c->pkeys[SSL_PKEY_ECC].digest = NULL; | |
3031 | ||
4453cd8c | 3032 | c->peer_sigalgs = OPENSSL_malloc(dsize); |
0f229cce | 3033 | if (!c->peer_sigalgs) |
e7f8ff43 | 3034 | return 0; |
4453cd8c DSH |
3035 | c->peer_sigalgslen = dsize; |
3036 | memcpy(c->peer_sigalgs, data, dsize); | |
6b7be581 | 3037 | |
4453cd8c | 3038 | tls1_set_shared_sigalgs(s); |
6b7be581 | 3039 | |
4453cd8c DSH |
3040 | for (i = 0, sigptr = c->shared_sigalgs; |
3041 | i < c->shared_sigalgslen; i++, sigptr++) | |
3042 | { | |
3043 | idx = tls12_get_pkey_idx(sigptr->rsign); | |
3044 | if (idx > 0 && c->pkeys[idx].digest == NULL) | |
6b7be581 | 3045 | { |
e7f8ff43 | 3046 | md = tls12_get_hash(sigptr->rhash); |
4453cd8c DSH |
3047 | c->pkeys[idx].digest = md; |
3048 | if (idx == SSL_PKEY_RSA_SIGN) | |
3049 | c->pkeys[SSL_PKEY_RSA_ENC].digest = md; | |
6b7be581 DSH |
3050 | } |
3051 | ||
6b7be581 | 3052 | } |
6b7be581 DSH |
3053 | /* Set any remaining keys to default values. NOTE: if alg is not |
3054 | * supported it stays as NULL. | |
3055 | */ | |
3056 | #ifndef OPENSSL_NO_DSA | |
3057 | if (!c->pkeys[SSL_PKEY_DSA_SIGN].digest) | |
be681e12 | 3058 | c->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_sha1(); |
6b7be581 DSH |
3059 | #endif |
3060 | #ifndef OPENSSL_NO_RSA | |
3061 | if (!c->pkeys[SSL_PKEY_RSA_SIGN].digest) | |
3062 | { | |
3063 | c->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1(); | |
3064 | c->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1(); | |
3065 | } | |
3066 | #endif | |
3067 | #ifndef OPENSSL_NO_ECDSA | |
3068 | if (!c->pkeys[SSL_PKEY_ECC].digest) | |
be681e12 | 3069 | c->pkeys[SSL_PKEY_ECC].digest = EVP_sha1(); |
6b7be581 DSH |
3070 | #endif |
3071 | return 1; | |
3072 | } | |
3073 | ||
4817504d | 3074 | |
e7f8ff43 | 3075 | int SSL_get_sigalgs(SSL *s, int idx, |
4453cd8c | 3076 | int *psign, int *phash, int *psignhash, |
e7f8ff43 DSH |
3077 | unsigned char *rsig, unsigned char *rhash) |
3078 | { | |
4453cd8c DSH |
3079 | const unsigned char *psig = s->cert->peer_sigalgs; |
3080 | if (psig == NULL) | |
e7f8ff43 DSH |
3081 | return 0; |
3082 | if (idx >= 0) | |
3083 | { | |
4453cd8c | 3084 | idx <<= 1; |
0f229cce | 3085 | if (idx >= (int)s->cert->peer_sigalgslen) |
e7f8ff43 | 3086 | return 0; |
4453cd8c | 3087 | psig += idx; |
e7f8ff43 | 3088 | if (rhash) |
4453cd8c DSH |
3089 | *rhash = psig[0]; |
3090 | if (rsig) | |
3091 | *rsig = psig[1]; | |
3092 | tls1_lookup_sigalg(phash, psign, psignhash, psig); | |
e7f8ff43 | 3093 | } |
4453cd8c DSH |
3094 | return s->cert->peer_sigalgslen / 2; |
3095 | } | |
3096 | ||
3097 | int SSL_get_shared_sigalgs(SSL *s, int idx, | |
3098 | int *psign, int *phash, int *psignhash, | |
3099 | unsigned char *rsig, unsigned char *rhash) | |
3100 | { | |
3101 | TLS_SIGALGS *shsigalgs = s->cert->shared_sigalgs; | |
3102 | if (!shsigalgs || idx >= (int)s->cert->shared_sigalgslen) | |
3103 | return 0; | |
3104 | shsigalgs += idx; | |
3105 | if (phash) | |
3106 | *phash = shsigalgs->hash_nid; | |
3107 | if (psign) | |
3108 | *psign = shsigalgs->sign_nid; | |
3109 | if (psignhash) | |
3110 | *psignhash = shsigalgs->signandhash_nid; | |
3111 | if (rsig) | |
3112 | *rsig = shsigalgs->rsign; | |
3113 | if (rhash) | |
3114 | *rhash = shsigalgs->rhash; | |
3115 | return s->cert->shared_sigalgslen; | |
e7f8ff43 DSH |
3116 | } |
3117 | ||
3118 | ||
4817504d DSH |
3119 | #ifndef OPENSSL_NO_HEARTBEATS |
3120 | int | |
3121 | tls1_process_heartbeat(SSL *s) | |
3122 | { | |
3123 | unsigned char *p = &s->s3->rrec.data[0], *pl; | |
3124 | unsigned short hbtype; | |
3125 | unsigned int payload; | |
3126 | unsigned int padding = 16; /* Use minimum padding */ | |
3127 | ||
3128 | /* Read type and payload length first */ | |
3129 | hbtype = *p++; | |
3130 | n2s(p, payload); | |
3131 | pl = p; | |
3132 | ||
3133 | if (s->msg_callback) | |
3134 | s->msg_callback(0, s->version, TLS1_RT_HEARTBEAT, | |
3135 | &s->s3->rrec.data[0], s->s3->rrec.length, | |
3136 | s, s->msg_callback_arg); | |
3137 | ||
3138 | if (hbtype == TLS1_HB_REQUEST) | |
3139 | { | |
3140 | unsigned char *buffer, *bp; | |
3141 | int r; | |
3142 | ||
3143 | /* Allocate memory for the response, size is 1 bytes | |
3144 | * message type, plus 2 bytes payload length, plus | |
3145 | * payload, plus padding | |
3146 | */ | |
3147 | buffer = OPENSSL_malloc(1 + 2 + payload + padding); | |
3148 | bp = buffer; | |
3149 | ||
3150 | /* Enter response type, length and copy payload */ | |
3151 | *bp++ = TLS1_HB_RESPONSE; | |
3152 | s2n(payload, bp); | |
3153 | memcpy(bp, pl, payload); | |
57cb030c DSH |
3154 | bp += payload; |
3155 | /* Random padding */ | |
3156 | RAND_pseudo_bytes(bp, padding); | |
3157 | ||
4817504d DSH |
3158 | r = ssl3_write_bytes(s, TLS1_RT_HEARTBEAT, buffer, 3 + payload + padding); |
3159 | ||
3160 | if (r >= 0 && s->msg_callback) | |
3161 | s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT, | |
3162 | buffer, 3 + payload + padding, | |
3163 | s, s->msg_callback_arg); | |
3164 | ||
3165 | OPENSSL_free(buffer); | |
3166 | ||
3167 | if (r < 0) | |
3168 | return r; | |
3169 | } | |
3170 | else if (hbtype == TLS1_HB_RESPONSE) | |
3171 | { | |
3172 | unsigned int seq; | |
3173 | ||
3174 | /* We only send sequence numbers (2 bytes unsigned int), | |
3175 | * and 16 random bytes, so we just try to read the | |
3176 | * sequence number */ | |
3177 | n2s(pl, seq); | |
3178 | ||
3179 | if (payload == 18 && seq == s->tlsext_hb_seq) | |
3180 | { | |
3181 | s->tlsext_hb_seq++; | |
3182 | s->tlsext_hb_pending = 0; | |
3183 | } | |
3184 | } | |
3185 | ||
3186 | return 0; | |
3187 | } | |
3188 | ||
3189 | int | |
3190 | tls1_heartbeat(SSL *s) | |
3191 | { | |
3192 | unsigned char *buf, *p; | |
3193 | int ret; | |
3194 | unsigned int payload = 18; /* Sequence number + random bytes */ | |
3195 | unsigned int padding = 16; /* Use minimum padding */ | |
3196 | ||
3197 | /* Only send if peer supports and accepts HB requests... */ | |
3198 | if (!(s->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED) || | |
3199 | s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_SEND_REQUESTS) | |
3200 | { | |
3201 | SSLerr(SSL_F_TLS1_HEARTBEAT,SSL_R_TLS_HEARTBEAT_PEER_DOESNT_ACCEPT); | |
3202 | return -1; | |
3203 | } | |
3204 | ||
3205 | /* ...and there is none in flight yet... */ | |
3206 | if (s->tlsext_hb_pending) | |
3207 | { | |
3208 | SSLerr(SSL_F_TLS1_HEARTBEAT,SSL_R_TLS_HEARTBEAT_PENDING); | |
3209 | return -1; | |
3210 | } | |
3211 | ||
3212 | /* ...and no handshake in progress. */ | |
3213 | if (SSL_in_init(s) || s->in_handshake) | |
3214 | { | |
3215 | SSLerr(SSL_F_TLS1_HEARTBEAT,SSL_R_UNEXPECTED_MESSAGE); | |
3216 | return -1; | |
3217 | } | |
3218 | ||
3219 | /* Check if padding is too long, payload and padding | |
3220 | * must not exceed 2^14 - 3 = 16381 bytes in total. | |
3221 | */ | |
3222 | OPENSSL_assert(payload + padding <= 16381); | |
3223 | ||
3224 | /* Create HeartBeat message, we just use a sequence number | |
3225 | * as payload to distuingish different messages and add | |
3226 | * some random stuff. | |
3227 | * - Message Type, 1 byte | |
3228 | * - Payload Length, 2 bytes (unsigned int) | |
3229 | * - Payload, the sequence number (2 bytes uint) | |
3230 | * - Payload, random bytes (16 bytes uint) | |
3231 | * - Padding | |
3232 | */ | |
3233 | buf = OPENSSL_malloc(1 + 2 + payload + padding); | |
3234 | p = buf; | |
3235 | /* Message Type */ | |
3236 | *p++ = TLS1_HB_REQUEST; | |
3237 | /* Payload length (18 bytes here) */ | |
3238 | s2n(payload, p); | |
3239 | /* Sequence number */ | |
3240 | s2n(s->tlsext_hb_seq, p); | |
3241 | /* 16 random bytes */ | |
3242 | RAND_pseudo_bytes(p, 16); | |
3243 | p += 16; | |
3244 | /* Random padding */ | |
3245 | RAND_pseudo_bytes(p, padding); | |
3246 | ||
3247 | ret = ssl3_write_bytes(s, TLS1_RT_HEARTBEAT, buf, 3 + payload + padding); | |
3248 | if (ret >= 0) | |
3249 | { | |
3250 | if (s->msg_callback) | |
3251 | s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT, | |
3252 | buf, 3 + payload + padding, | |
3253 | s, s->msg_callback_arg); | |
3254 | ||
3255 | s->tlsext_hb_pending = 1; | |
3256 | } | |
3257 | ||
3258 | OPENSSL_free(buf); | |
3259 | ||
3260 | return ret; | |
3261 | } | |
3262 | #endif | |
0f229cce | 3263 | |
4453cd8c | 3264 | #define MAX_SIGALGLEN (TLSEXT_hash_num * TLSEXT_signature_num * 2) |
0f229cce DSH |
3265 | |
3266 | typedef struct | |
3267 | { | |
3268 | size_t sigalgcnt; | |
3269 | int sigalgs[MAX_SIGALGLEN]; | |
3270 | } sig_cb_st; | |
3271 | ||
3272 | static int sig_cb(const char *elem, int len, void *arg) | |
3273 | { | |
3274 | sig_cb_st *sarg = arg; | |
3275 | size_t i; | |
3276 | char etmp[20], *p; | |
3277 | int sig_alg, hash_alg; | |
3278 | if (sarg->sigalgcnt == MAX_SIGALGLEN) | |
3279 | return 0; | |
3280 | if (len > (int)(sizeof(etmp) - 1)) | |
3281 | return 0; | |
3282 | memcpy(etmp, elem, len); | |
3283 | etmp[len] = 0; | |
3284 | p = strchr(etmp, '+'); | |
3285 | if (!p) | |
3286 | return 0; | |
3287 | *p = 0; | |
3288 | p++; | |
3289 | if (!*p) | |
3290 | return 0; | |
3291 | ||
3292 | if (!strcmp(etmp, "RSA")) | |
3293 | sig_alg = EVP_PKEY_RSA; | |
3294 | else if (!strcmp(etmp, "DSA")) | |
3295 | sig_alg = EVP_PKEY_DSA; | |
3296 | else if (!strcmp(etmp, "ECDSA")) | |
3297 | sig_alg = EVP_PKEY_EC; | |
3298 | else return 0; | |
3299 | ||
3300 | hash_alg = OBJ_sn2nid(p); | |
3301 | if (hash_alg == NID_undef) | |
3302 | hash_alg = OBJ_ln2nid(p); | |
3303 | if (hash_alg == NID_undef) | |
3304 | return 0; | |
3305 | ||
3306 | for (i = 0; i < sarg->sigalgcnt; i+=2) | |
3307 | { | |
3308 | if (sarg->sigalgs[i] == sig_alg | |
3309 | && sarg->sigalgs[i + 1] == hash_alg) | |
3310 | return 0; | |
3311 | } | |
3312 | sarg->sigalgs[sarg->sigalgcnt++] = hash_alg; | |
3313 | sarg->sigalgs[sarg->sigalgcnt++] = sig_alg; | |
3314 | return 1; | |
3315 | } | |
3316 | ||
3317 | /* Set suppored signature algorithms based on a colon separated list | |
3318 | * of the form sig+hash e.g. RSA+SHA512:DSA+SHA512 */ | |
3319 | int tls1_set_sigalgs_list(CERT *c, const char *str) | |
3320 | { | |
3321 | sig_cb_st sig; | |
3322 | sig.sigalgcnt = 0; | |
3323 | if (!CONF_parse_list(str, ':', 1, sig_cb, &sig)) | |
3324 | return 0; | |
3325 | return tls1_set_sigalgs(c, sig.sigalgs, sig.sigalgcnt); | |
3326 | } | |
3327 | ||
4453cd8c | 3328 | int tls1_set_sigalgs(CERT *c, const int *psig_nids, size_t salglen) |
0f229cce | 3329 | { |
4453cd8c | 3330 | unsigned char *sigalgs, *sptr; |
0f229cce DSH |
3331 | int rhash, rsign; |
3332 | size_t i; | |
3333 | if (salglen & 1) | |
3334 | return 0; | |
4453cd8c | 3335 | sigalgs = OPENSSL_malloc(salglen); |
0f229cce DSH |
3336 | if (sigalgs == NULL) |
3337 | return 0; | |
4453cd8c | 3338 | for (i = 0, sptr = sigalgs; i < salglen; i+=2) |
0f229cce | 3339 | { |
4453cd8c | 3340 | rhash = tls12_find_id(*psig_nids++, tls12_md, |
0f229cce | 3341 | sizeof(tls12_md)/sizeof(tls12_lookup)); |
4453cd8c | 3342 | rsign = tls12_find_id(*psig_nids++, tls12_sig, |
0f229cce DSH |
3343 | sizeof(tls12_sig)/sizeof(tls12_lookup)); |
3344 | ||
3345 | if (rhash == -1 || rsign == -1) | |
3346 | goto err; | |
4453cd8c DSH |
3347 | *sptr++ = rhash; |
3348 | *sptr++ = rsign; | |
0f229cce DSH |
3349 | } |
3350 | ||
3351 | if (c->conf_sigalgs) | |
3352 | OPENSSL_free(c->conf_sigalgs); | |
3353 | ||
3354 | c->conf_sigalgs = sigalgs; | |
3355 | c->conf_sigalgslen = salglen; | |
3356 | return 1; | |
3357 | ||
3358 | err: | |
3359 | OPENSSL_free(sigalgs); | |
3360 | return 0; | |
3361 | } | |
4453cd8c DSH |
3362 | |
3363 | #endif |