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58964a49 RE |
1 | /* ssl/t1_lib.c */ |
2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
3 | * All rights reserved. | |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
8 | * | |
9 | * This library is free for commercial and non-commercial use as long as | |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
15 | * | |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in | |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
22 | * | |
23 | * Redistribution and use in source and binary forms, with or without | |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
37 | * 4. If you include any Windows specific code (or a derivative thereof) from | |
38 | * the apps directory (application code) you must include an acknowledgement: | |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40 | * | |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
52 | * | |
53 | * The licence and distribution terms for any publically available version or | |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
f1fd4544 | 58 | /* ==================================================================== |
52b8dad8 | 59 | * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. |
f1fd4544 BM |
60 | * |
61 | * Redistribution and use in source and binary forms, with or without | |
62 | * modification, are permitted provided that the following conditions | |
63 | * are met: | |
64 | * | |
65 | * 1. Redistributions of source code must retain the above copyright | |
66 | * notice, this list of conditions and the following disclaimer. | |
67 | * | |
68 | * 2. Redistributions in binary form must reproduce the above copyright | |
69 | * notice, this list of conditions and the following disclaimer in | |
70 | * the documentation and/or other materials provided with the | |
71 | * distribution. | |
72 | * | |
73 | * 3. All advertising materials mentioning features or use of this | |
74 | * software must display the following acknowledgment: | |
75 | * "This product includes software developed by the OpenSSL Project | |
76 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
77 | * | |
78 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
79 | * endorse or promote products derived from this software without | |
80 | * prior written permission. For written permission, please contact | |
81 | * openssl-core@openssl.org. | |
82 | * | |
83 | * 5. Products derived from this software may not be called "OpenSSL" | |
84 | * nor may "OpenSSL" appear in their names without prior written | |
85 | * permission of the OpenSSL Project. | |
86 | * | |
87 | * 6. Redistributions of any form whatsoever must retain the following | |
88 | * acknowledgment: | |
89 | * "This product includes software developed by the OpenSSL Project | |
90 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
91 | * | |
92 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
93 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
94 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
95 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
96 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
97 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
98 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
99 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
100 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
101 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
102 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
103 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
104 | * ==================================================================== | |
105 | * | |
106 | * This product includes cryptographic software written by Eric Young | |
107 | * (eay@cryptsoft.com). This product includes software written by Tim | |
108 | * Hudson (tjh@cryptsoft.com). | |
109 | * | |
110 | */ | |
58964a49 RE |
111 | |
112 | #include <stdio.h> | |
ec577822 | 113 | #include <openssl/objects.h> |
6434abbf DSH |
114 | #include <openssl/evp.h> |
115 | #include <openssl/hmac.h> | |
67c8e7f4 | 116 | #include <openssl/ocsp.h> |
58964a49 RE |
117 | #include "ssl_locl.h" |
118 | ||
42182852 | 119 | const char tls1_version_str[]="TLSv1" OPENSSL_VERSION_PTEXT; |
58964a49 | 120 | |
367eb1f1 | 121 | #ifndef OPENSSL_NO_TLSEXT |
6434abbf DSH |
122 | static int tls_decrypt_ticket(SSL *s, const unsigned char *tick, int ticklen, |
123 | const unsigned char *sess_id, int sesslen, | |
124 | SSL_SESSION **psess); | |
367eb1f1 | 125 | #endif |
6434abbf | 126 | |
f3b656b2 | 127 | SSL3_ENC_METHOD TLSv1_enc_data={ |
58964a49 RE |
128 | tls1_enc, |
129 | tls1_mac, | |
130 | tls1_setup_key_block, | |
131 | tls1_generate_master_secret, | |
132 | tls1_change_cipher_state, | |
133 | tls1_final_finish_mac, | |
134 | TLS1_FINISH_MAC_LENGTH, | |
135 | tls1_cert_verify_mac, | |
136 | TLS_MD_CLIENT_FINISH_CONST,TLS_MD_CLIENT_FINISH_CONST_SIZE, | |
137 | TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE, | |
138 | tls1_alert_code, | |
139 | }; | |
140 | ||
f3b656b2 | 141 | long tls1_default_timeout(void) |
58964a49 RE |
142 | { |
143 | /* 2 hours, the 24 hours mentioned in the TLSv1 spec | |
144 | * is way too long for http, the cache would over fill */ | |
145 | return(60*60*2); | |
146 | } | |
147 | ||
6b691a5c | 148 | int tls1_new(SSL *s) |
58964a49 RE |
149 | { |
150 | if (!ssl3_new(s)) return(0); | |
151 | s->method->ssl_clear(s); | |
152 | return(1); | |
153 | } | |
154 | ||
6b691a5c | 155 | void tls1_free(SSL *s) |
58964a49 | 156 | { |
12bf56c0 DSH |
157 | #ifndef OPENSSL_NO_TLSEXT |
158 | if (s->tlsext_session_ticket) | |
159 | { | |
160 | OPENSSL_free(s->tlsext_session_ticket); | |
161 | } | |
162 | #endif /* OPENSSL_NO_TLSEXT */ | |
58964a49 RE |
163 | ssl3_free(s); |
164 | } | |
165 | ||
6b691a5c | 166 | void tls1_clear(SSL *s) |
58964a49 RE |
167 | { |
168 | ssl3_clear(s); | |
637f374a | 169 | s->version = s->method->version; |
58964a49 RE |
170 | } |
171 | ||
525de5d3 DSH |
172 | #ifndef OPENSSL_NO_EC |
173 | static int nid_list[] = | |
174 | { | |
175 | NID_sect163k1, /* sect163k1 (1) */ | |
176 | NID_sect163r1, /* sect163r1 (2) */ | |
177 | NID_sect163r2, /* sect163r2 (3) */ | |
178 | NID_sect193r1, /* sect193r1 (4) */ | |
179 | NID_sect193r2, /* sect193r2 (5) */ | |
180 | NID_sect233k1, /* sect233k1 (6) */ | |
181 | NID_sect233r1, /* sect233r1 (7) */ | |
182 | NID_sect239k1, /* sect239k1 (8) */ | |
183 | NID_sect283k1, /* sect283k1 (9) */ | |
184 | NID_sect283r1, /* sect283r1 (10) */ | |
185 | NID_sect409k1, /* sect409k1 (11) */ | |
186 | NID_sect409r1, /* sect409r1 (12) */ | |
187 | NID_sect571k1, /* sect571k1 (13) */ | |
188 | NID_sect571r1, /* sect571r1 (14) */ | |
189 | NID_secp160k1, /* secp160k1 (15) */ | |
190 | NID_secp160r1, /* secp160r1 (16) */ | |
191 | NID_secp160r2, /* secp160r2 (17) */ | |
192 | NID_secp192k1, /* secp192k1 (18) */ | |
193 | NID_X9_62_prime192v1, /* secp192r1 (19) */ | |
194 | NID_secp224k1, /* secp224k1 (20) */ | |
195 | NID_secp224r1, /* secp224r1 (21) */ | |
196 | NID_secp256k1, /* secp256k1 (22) */ | |
197 | NID_X9_62_prime256v1, /* secp256r1 (23) */ | |
198 | NID_secp384r1, /* secp384r1 (24) */ | |
199 | NID_secp521r1 /* secp521r1 (25) */ | |
200 | }; | |
201 | ||
202 | int tls1_ec_curve_id2nid(int curve_id) | |
203 | { | |
204 | /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */ | |
1e26a8ba GT |
205 | if ((curve_id < 1) || ((unsigned int)curve_id > |
206 | sizeof(nid_list)/sizeof(nid_list[0]))) | |
207 | return 0; | |
525de5d3 DSH |
208 | return nid_list[curve_id-1]; |
209 | } | |
210 | ||
211 | int tls1_ec_nid2curve_id(int nid) | |
212 | { | |
213 | /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */ | |
214 | switch (nid) | |
215 | { | |
216 | case NID_sect163k1: /* sect163k1 (1) */ | |
217 | return 1; | |
218 | case NID_sect163r1: /* sect163r1 (2) */ | |
219 | return 2; | |
220 | case NID_sect163r2: /* sect163r2 (3) */ | |
221 | return 3; | |
222 | case NID_sect193r1: /* sect193r1 (4) */ | |
223 | return 4; | |
224 | case NID_sect193r2: /* sect193r2 (5) */ | |
225 | return 5; | |
226 | case NID_sect233k1: /* sect233k1 (6) */ | |
227 | return 6; | |
228 | case NID_sect233r1: /* sect233r1 (7) */ | |
229 | return 7; | |
230 | case NID_sect239k1: /* sect239k1 (8) */ | |
231 | return 8; | |
232 | case NID_sect283k1: /* sect283k1 (9) */ | |
233 | return 9; | |
234 | case NID_sect283r1: /* sect283r1 (10) */ | |
235 | return 10; | |
236 | case NID_sect409k1: /* sect409k1 (11) */ | |
237 | return 11; | |
238 | case NID_sect409r1: /* sect409r1 (12) */ | |
239 | return 12; | |
240 | case NID_sect571k1: /* sect571k1 (13) */ | |
241 | return 13; | |
242 | case NID_sect571r1: /* sect571r1 (14) */ | |
243 | return 14; | |
244 | case NID_secp160k1: /* secp160k1 (15) */ | |
245 | return 15; | |
246 | case NID_secp160r1: /* secp160r1 (16) */ | |
247 | return 16; | |
248 | case NID_secp160r2: /* secp160r2 (17) */ | |
249 | return 17; | |
250 | case NID_secp192k1: /* secp192k1 (18) */ | |
251 | return 18; | |
252 | case NID_X9_62_prime192v1: /* secp192r1 (19) */ | |
253 | return 19; | |
254 | case NID_secp224k1: /* secp224k1 (20) */ | |
255 | return 20; | |
256 | case NID_secp224r1: /* secp224r1 (21) */ | |
257 | return 21; | |
258 | case NID_secp256k1: /* secp256k1 (22) */ | |
259 | return 22; | |
260 | case NID_X9_62_prime256v1: /* secp256r1 (23) */ | |
261 | return 23; | |
262 | case NID_secp384r1: /* secp384r1 (24) */ | |
263 | return 24; | |
264 | case NID_secp521r1: /* secp521r1 (25) */ | |
265 | return 25; | |
266 | default: | |
267 | return 0; | |
268 | } | |
269 | } | |
270 | #endif /* OPENSSL_NO_EC */ | |
f1fd4544 | 271 | |
ed3883d2 | 272 | #ifndef OPENSSL_NO_TLSEXT |
fc101f88 DSH |
273 | |
274 | /* List of supported signature algorithms and hashes. Should make this | |
275 | * customisable at some point, for now include everything we support. | |
276 | */ | |
277 | ||
278 | #ifdef OPENSSL_NO_RSA | |
279 | #define tlsext_sigalg_rsa(md) /* */ | |
280 | #else | |
281 | #define tlsext_sigalg_rsa(md) md, TLSEXT_signature_rsa, | |
282 | #endif | |
283 | ||
284 | #ifdef OPENSSL_NO_DSA | |
285 | #define tlsext_sigalg_dsa(md) /* */ | |
286 | #else | |
287 | #define tlsext_sigalg_dsa(md) md, TLSEXT_signature_dsa, | |
288 | #endif | |
289 | ||
290 | #ifdef OPENSSL_NO_ECDSA | |
291 | #define tlsext_sigalg_ecdsa(md) /* */ | |
292 | #else | |
293 | #define tlsext_sigalg_ecdsa(md) md, TLSEXT_signature_dsa, | |
294 | #endif | |
295 | ||
296 | #define tlsext_sigalg(md) \ | |
297 | tlsext_sigalg_rsa(md) \ | |
298 | tlsext_sigalg_dsa(md) \ | |
299 | tlsext_sigalg_ecdsa(md) | |
300 | ||
301 | static unsigned char tls12_sigalgs[] = { | |
302 | #ifndef OPENSSL_NO_SHA512 | |
303 | tlsext_sigalg(TLSEXT_hash_sha512) | |
304 | tlsext_sigalg(TLSEXT_hash_sha384) | |
305 | #endif | |
306 | #ifndef OPENSSL_NO_SHA256 | |
307 | tlsext_sigalg(TLSEXT_hash_sha256) | |
308 | tlsext_sigalg(TLSEXT_hash_sha224) | |
309 | #endif | |
310 | #ifndef OPENSSL_NO_SHA | |
311 | tlsext_sigalg(TLSEXT_hash_sha1) | |
312 | #endif | |
313 | #ifndef OPENSSL_NO_MD5 | |
314 | tlsext_sigalg_rsa(TLSEXT_hash_md5) | |
315 | #endif | |
316 | }; | |
317 | ||
f37f20ff DSH |
318 | int tls12_get_req_sig_algs(SSL *s, unsigned char *p) |
319 | { | |
320 | if (p) | |
321 | memcpy(p, tls12_sigalgs, sizeof(tls12_sigalgs)); | |
322 | return (int)sizeof(tls12_sigalgs); | |
323 | } | |
fc101f88 | 324 | |
f1fd4544 BM |
325 | unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned char *limit) |
326 | { | |
ed3883d2 BM |
327 | int extdatalen=0; |
328 | unsigned char *ret = p; | |
329 | ||
13f6d57b DSH |
330 | /* don't add extensions for SSLv3 unless doing secure renegotiation */ |
331 | if (s->client_version == SSL3_VERSION | |
332 | && !s->s3->send_connection_binding) | |
5f8f94a6 DSH |
333 | return p; |
334 | ||
ed3883d2 BM |
335 | ret+=2; |
336 | ||
337 | if (ret>=limit) return NULL; /* this really never occurs, but ... */ | |
6434abbf | 338 | |
a70183bc | 339 | if (s->tlsext_hostname != NULL) |
f1fd4544 | 340 | { |
ed3883d2 BM |
341 | /* Add TLS extension servername to the Client Hello message */ |
342 | unsigned long size_str; | |
343 | long lenmax; | |
344 | ||
a70183bc | 345 | /* check for enough space. |
52b8dad8 BM |
346 | 4 for the servername type and entension length |
347 | 2 for servernamelist length | |
348 | 1 for the hostname type | |
349 | 2 for hostname length | |
350 | + hostname length | |
a70183bc | 351 | */ |
52b8dad8 | 352 | |
761772d7 BM |
353 | if ((lenmax = limit - ret - 9) < 0 |
354 | || (size_str = strlen(s->tlsext_hostname)) > (unsigned long)lenmax) | |
a70183bc BM |
355 | return NULL; |
356 | ||
357 | /* extension type and length */ | |
358 | s2n(TLSEXT_TYPE_server_name,ret); | |
359 | s2n(size_str+5,ret); | |
f1fd4544 | 360 | |
a70183bc | 361 | /* length of servername list */ |
ed3883d2 | 362 | s2n(size_str+3,ret); |
a70183bc BM |
363 | |
364 | /* hostname type, length and hostname */ | |
f1fd4544 | 365 | *(ret++) = (unsigned char) TLSEXT_NAMETYPE_host_name; |
ed3883d2 | 366 | s2n(size_str,ret); |
ed3883d2 BM |
367 | memcpy(ret, s->tlsext_hostname, size_str); |
368 | ret+=size_str; | |
f1fd4544 | 369 | } |
761772d7 | 370 | |
423c66f1 | 371 | /* Add RI if renegotiating */ |
bdd53508 | 372 | if (s->renegotiate) |
423c66f1 | 373 | { |
860c3dd1 DSH |
374 | int el; |
375 | ||
376 | if(!ssl_add_clienthello_renegotiate_ext(s, 0, &el, 0)) | |
377 | { | |
378 | SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
379 | return NULL; | |
380 | } | |
381 | ||
382 | if((limit - p - 4 - el) < 0) return NULL; | |
383 | ||
384 | s2n(TLSEXT_TYPE_renegotiate,ret); | |
385 | s2n(el,ret); | |
386 | ||
387 | if(!ssl_add_clienthello_renegotiate_ext(s, ret, &el, el)) | |
388 | { | |
389 | SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
390 | return NULL; | |
391 | } | |
392 | ||
393 | ret += el; | |
394 | } | |
395 | ||
edc032b5 BL |
396 | #ifndef OPENSSL_NO_SRP |
397 | #define MIN(x,y) (((x)<(y))?(x):(y)) | |
398 | /* we add SRP username the first time only if we have one! */ | |
399 | if (s->srp_ctx.login != NULL) | |
400 | {/* Add TLS extension SRP username to the Client Hello message */ | |
401 | int login_len = MIN(strlen(s->srp_ctx.login) + 1, 255); | |
402 | long lenmax; | |
403 | ||
404 | if ((lenmax = limit - ret - 5) < 0) return NULL; | |
405 | if (login_len > lenmax) return NULL; | |
406 | if (login_len > 255) | |
407 | { | |
408 | SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
409 | return NULL; | |
410 | } | |
411 | s2n(TLSEXT_TYPE_srp,ret); | |
412 | s2n(login_len+1,ret); | |
413 | ||
414 | (*ret++) = (unsigned char) MIN(strlen(s->srp_ctx.login), 254); | |
415 | memcpy(ret, s->srp_ctx.login, MIN(strlen(s->srp_ctx.login), 254)); | |
416 | ret+=login_len; | |
417 | } | |
418 | #endif | |
419 | ||
36ca4ba6 | 420 | #ifndef OPENSSL_NO_EC |
8025e251 DSH |
421 | if (s->tlsext_ecpointformatlist != NULL && |
422 | s->version != DTLS1_VERSION) | |
36ca4ba6 BM |
423 | { |
424 | /* Add TLS extension ECPointFormats to the ClientHello message */ | |
425 | long lenmax; | |
426 | ||
761772d7 | 427 | if ((lenmax = limit - ret - 5) < 0) return NULL; |
36ca4ba6 | 428 | if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL; |
019fdc78 BM |
429 | if (s->tlsext_ecpointformatlist_length > 255) |
430 | { | |
431 | SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
432 | return NULL; | |
433 | } | |
36ca4ba6 BM |
434 | |
435 | s2n(TLSEXT_TYPE_ec_point_formats,ret); | |
436 | s2n(s->tlsext_ecpointformatlist_length + 1,ret); | |
437 | *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length; | |
438 | memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length); | |
439 | ret+=s->tlsext_ecpointformatlist_length; | |
440 | } | |
8025e251 DSH |
441 | if (s->tlsext_ellipticcurvelist != NULL && |
442 | s->version != DTLS1_VERSION) | |
33273721 BM |
443 | { |
444 | /* Add TLS extension EllipticCurves to the ClientHello message */ | |
445 | long lenmax; | |
446 | ||
761772d7 | 447 | if ((lenmax = limit - ret - 6) < 0) return NULL; |
33273721 | 448 | if (s->tlsext_ellipticcurvelist_length > (unsigned long)lenmax) return NULL; |
a4974de9 | 449 | if (s->tlsext_ellipticcurvelist_length > 65532) |
33273721 BM |
450 | { |
451 | SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
452 | return NULL; | |
453 | } | |
454 | ||
455 | s2n(TLSEXT_TYPE_elliptic_curves,ret); | |
a123c552 | 456 | s2n(s->tlsext_ellipticcurvelist_length + 2, ret); |
a4974de9 BM |
457 | |
458 | /* NB: draft-ietf-tls-ecc-12.txt uses a one-byte prefix for | |
459 | * elliptic_curve_list, but the examples use two bytes. | |
460 | * http://www1.ietf.org/mail-archive/web/tls/current/msg00538.html | |
461 | * resolves this to two bytes. | |
462 | */ | |
a123c552 | 463 | s2n(s->tlsext_ellipticcurvelist_length, ret); |
33273721 BM |
464 | memcpy(ret, s->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist_length); |
465 | ret+=s->tlsext_ellipticcurvelist_length; | |
466 | } | |
36ca4ba6 | 467 | #endif /* OPENSSL_NO_EC */ |
d3442bc7 | 468 | |
6434abbf DSH |
469 | if (!(SSL_get_options(s) & SSL_OP_NO_TICKET)) |
470 | { | |
471 | int ticklen; | |
7ba3838a | 472 | if (!s->new_session && s->session && s->session->tlsext_tick) |
6434abbf | 473 | ticklen = s->session->tlsext_ticklen; |
12bf56c0 DSH |
474 | else if (s->session && s->tlsext_session_ticket && |
475 | s->tlsext_session_ticket->data) | |
476 | { | |
477 | ticklen = s->tlsext_session_ticket->length; | |
478 | s->session->tlsext_tick = OPENSSL_malloc(ticklen); | |
479 | if (!s->session->tlsext_tick) | |
480 | return NULL; | |
481 | memcpy(s->session->tlsext_tick, | |
482 | s->tlsext_session_ticket->data, | |
483 | ticklen); | |
484 | s->session->tlsext_ticklen = ticklen; | |
485 | } | |
6434abbf DSH |
486 | else |
487 | ticklen = 0; | |
12bf56c0 DSH |
488 | if (ticklen == 0 && s->tlsext_session_ticket && |
489 | s->tlsext_session_ticket->data == NULL) | |
490 | goto skip_ext; | |
6434abbf DSH |
491 | /* Check for enough room 2 for extension type, 2 for len |
492 | * rest for ticket | |
493 | */ | |
761772d7 | 494 | if ((long)(limit - ret - 4 - ticklen) < 0) return NULL; |
6434abbf DSH |
495 | s2n(TLSEXT_TYPE_session_ticket,ret); |
496 | s2n(ticklen,ret); | |
497 | if (ticklen) | |
498 | { | |
499 | memcpy(ret, s->session->tlsext_tick, ticklen); | |
500 | ret += ticklen; | |
501 | } | |
502 | } | |
12bf56c0 | 503 | skip_ext: |
6434abbf | 504 | |
238b6361 | 505 | if (TLS1_get_version(s) >= TLS1_2_VERSION) |
a2f9200f | 506 | { |
fc101f88 | 507 | if ((size_t)(limit - ret) < sizeof(tls12_sigalgs) + 6) |
a2f9200f DSH |
508 | return NULL; |
509 | s2n(TLSEXT_TYPE_signature_algorithms,ret); | |
fc101f88 DSH |
510 | s2n(sizeof(tls12_sigalgs) + 2, ret); |
511 | s2n(sizeof(tls12_sigalgs), ret); | |
512 | memcpy(ret, tls12_sigalgs, sizeof(tls12_sigalgs)); | |
513 | ret += sizeof(tls12_sigalgs); | |
a2f9200f DSH |
514 | } |
515 | ||
761772d7 | 516 | #ifdef TLSEXT_TYPE_opaque_prf_input |
8025e251 DSH |
517 | if (s->s3->client_opaque_prf_input != NULL && |
518 | s->version != DTLS1_VERSION) | |
761772d7 BM |
519 | { |
520 | size_t col = s->s3->client_opaque_prf_input_len; | |
521 | ||
522 | if ((long)(limit - ret - 6 - col < 0)) | |
523 | return NULL; | |
524 | if (col > 0xFFFD) /* can't happen */ | |
525 | return NULL; | |
526 | ||
527 | s2n(TLSEXT_TYPE_opaque_prf_input, ret); | |
528 | s2n(col + 2, ret); | |
529 | s2n(col, ret); | |
530 | memcpy(ret, s->s3->client_opaque_prf_input, col); | |
531 | ret += col; | |
532 | } | |
533 | #endif | |
534 | ||
8025e251 DSH |
535 | if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp && |
536 | s->version != DTLS1_VERSION) | |
67c8e7f4 DSH |
537 | { |
538 | int i; | |
539 | long extlen, idlen, itmp; | |
540 | OCSP_RESPID *id; | |
541 | ||
542 | idlen = 0; | |
543 | for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++) | |
544 | { | |
545 | id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i); | |
546 | itmp = i2d_OCSP_RESPID(id, NULL); | |
547 | if (itmp <= 0) | |
548 | return NULL; | |
549 | idlen += itmp + 2; | |
550 | } | |
551 | ||
552 | if (s->tlsext_ocsp_exts) | |
553 | { | |
554 | extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL); | |
555 | if (extlen < 0) | |
556 | return NULL; | |
557 | } | |
558 | else | |
559 | extlen = 0; | |
560 | ||
561 | if ((long)(limit - ret - 7 - extlen - idlen) < 0) return NULL; | |
562 | s2n(TLSEXT_TYPE_status_request, ret); | |
563 | if (extlen + idlen > 0xFFF0) | |
564 | return NULL; | |
565 | s2n(extlen + idlen + 5, ret); | |
566 | *(ret++) = TLSEXT_STATUSTYPE_ocsp; | |
567 | s2n(idlen, ret); | |
568 | for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++) | |
569 | { | |
570 | /* save position of id len */ | |
571 | unsigned char *q = ret; | |
572 | id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i); | |
573 | /* skip over id len */ | |
574 | ret += 2; | |
575 | itmp = i2d_OCSP_RESPID(id, &ret); | |
576 | /* write id len */ | |
577 | s2n(itmp, q); | |
578 | } | |
579 | s2n(extlen, ret); | |
580 | if (extlen > 0) | |
581 | i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &ret); | |
582 | } | |
583 | ||
bf48836c | 584 | #ifndef OPENSSL_NO_NEXTPROTONEG |
ee2ffc27 BL |
585 | if (s->ctx->next_proto_select_cb && !s->s3->tmp.finish_md_len) |
586 | { | |
587 | /* The client advertises an emtpy extension to indicate its | |
588 | * support for Next Protocol Negotiation */ | |
589 | if (limit - ret - 4 < 0) | |
590 | return NULL; | |
591 | s2n(TLSEXT_TYPE_next_proto_neg,ret); | |
592 | s2n(0,ret); | |
593 | } | |
594 | #endif | |
595 | ||
ed3883d2 BM |
596 | if ((extdatalen = ret-p-2)== 0) |
597 | return p; | |
598 | ||
599 | s2n(extdatalen,p); | |
600 | return ret; | |
52b8dad8 | 601 | } |
ed3883d2 | 602 | |
f1fd4544 BM |
603 | unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit) |
604 | { | |
ed3883d2 BM |
605 | int extdatalen=0; |
606 | unsigned char *ret = p; | |
bf48836c BL |
607 | #ifndef OPENSSL_NO_NEXTPROTONEG |
608 | int next_proto_neg_seen; | |
ee2ffc27 | 609 | #endif |
ed3883d2 | 610 | |
13f6d57b DSH |
611 | /* don't add extensions for SSLv3, unless doing secure renegotiation */ |
612 | if (s->version == SSL3_VERSION && !s->s3->send_connection_binding) | |
5f8f94a6 DSH |
613 | return p; |
614 | ||
a13c20f6 | 615 | ret+=2; |
ed3883d2 BM |
616 | if (ret>=limit) return NULL; /* this really never occurs, but ... */ |
617 | ||
a13c20f6 | 618 | if (!s->hit && s->servername_done == 1 && s->session->tlsext_hostname != NULL) |
f1fd4544 | 619 | { |
761772d7 | 620 | if ((long)(limit - ret - 4) < 0) return NULL; |
ed3883d2 BM |
621 | |
622 | s2n(TLSEXT_TYPE_server_name,ret); | |
623 | s2n(0,ret); | |
f1fd4544 | 624 | } |
860c3dd1 | 625 | |
8025e251 | 626 | if(s->s3->send_connection_binding) |
860c3dd1 DSH |
627 | { |
628 | int el; | |
629 | ||
630 | if(!ssl_add_serverhello_renegotiate_ext(s, 0, &el, 0)) | |
631 | { | |
632 | SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
633 | return NULL; | |
634 | } | |
635 | ||
636 | if((limit - p - 4 - el) < 0) return NULL; | |
637 | ||
638 | s2n(TLSEXT_TYPE_renegotiate,ret); | |
639 | s2n(el,ret); | |
640 | ||
641 | if(!ssl_add_serverhello_renegotiate_ext(s, ret, &el, el)) | |
642 | { | |
643 | SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
644 | return NULL; | |
645 | } | |
646 | ||
647 | ret += el; | |
648 | } | |
649 | ||
36ca4ba6 | 650 | #ifndef OPENSSL_NO_EC |
8025e251 DSH |
651 | if (s->tlsext_ecpointformatlist != NULL && |
652 | s->version != DTLS1_VERSION) | |
36ca4ba6 BM |
653 | { |
654 | /* Add TLS extension ECPointFormats to the ServerHello message */ | |
655 | long lenmax; | |
656 | ||
761772d7 | 657 | if ((lenmax = limit - ret - 5) < 0) return NULL; |
36ca4ba6 | 658 | if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL; |
019fdc78 BM |
659 | if (s->tlsext_ecpointformatlist_length > 255) |
660 | { | |
661 | SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR); | |
662 | return NULL; | |
663 | } | |
36ca4ba6 BM |
664 | |
665 | s2n(TLSEXT_TYPE_ec_point_formats,ret); | |
666 | s2n(s->tlsext_ecpointformatlist_length + 1,ret); | |
667 | *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length; | |
668 | memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length); | |
669 | ret+=s->tlsext_ecpointformatlist_length; | |
a70183bc | 670 | |
36ca4ba6 | 671 | } |
33273721 | 672 | /* Currently the server should not respond with a SupportedCurves extension */ |
36ca4ba6 | 673 | #endif /* OPENSSL_NO_EC */ |
67c8e7f4 | 674 | |
6434abbf DSH |
675 | if (s->tlsext_ticket_expected |
676 | && !(SSL_get_options(s) & SSL_OP_NO_TICKET)) | |
677 | { | |
761772d7 | 678 | if ((long)(limit - ret - 4) < 0) return NULL; |
6434abbf DSH |
679 | s2n(TLSEXT_TYPE_session_ticket,ret); |
680 | s2n(0,ret); | |
681 | } | |
761772d7 | 682 | |
67c8e7f4 DSH |
683 | if (s->tlsext_status_expected) |
684 | { | |
685 | if ((long)(limit - ret - 4) < 0) return NULL; | |
686 | s2n(TLSEXT_TYPE_status_request,ret); | |
687 | s2n(0,ret); | |
688 | } | |
689 | ||
761772d7 | 690 | #ifdef TLSEXT_TYPE_opaque_prf_input |
8025e251 DSH |
691 | if (s->s3->server_opaque_prf_input != NULL && |
692 | s->version != DTLS1_VERSION) | |
761772d7 BM |
693 | { |
694 | size_t sol = s->s3->server_opaque_prf_input_len; | |
6434abbf | 695 | |
761772d7 BM |
696 | if ((long)(limit - ret - 6 - sol) < 0) |
697 | return NULL; | |
698 | if (sol > 0xFFFD) /* can't happen */ | |
699 | return NULL; | |
700 | ||
701 | s2n(TLSEXT_TYPE_opaque_prf_input, ret); | |
702 | s2n(sol + 2, ret); | |
703 | s2n(sol, ret); | |
704 | memcpy(ret, s->s3->server_opaque_prf_input, sol); | |
705 | ret += sol; | |
706 | } | |
707 | #endif | |
0e1dba93 DSH |
708 | if (((s->s3->tmp.new_cipher->id & 0xFFFF)==0x80 || (s->s3->tmp.new_cipher->id & 0xFFFF)==0x81) |
709 | && (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG)) | |
710 | { const unsigned char cryptopro_ext[36] = { | |
711 | 0xfd, 0xe8, /*65000*/ | |
712 | 0x00, 0x20, /*32 bytes length*/ | |
713 | 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85, | |
714 | 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06, | |
715 | 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08, | |
716 | 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17}; | |
717 | if (limit-ret<36) return NULL; | |
718 | memcpy(ret,cryptopro_ext,36); | |
719 | ret+=36; | |
720 | ||
721 | } | |
761772d7 | 722 | |
bf48836c | 723 | #ifndef OPENSSL_NO_NEXTPROTONEG |
ee2ffc27 BL |
724 | next_proto_neg_seen = s->s3->next_proto_neg_seen; |
725 | s->s3->next_proto_neg_seen = 0; | |
726 | if (next_proto_neg_seen && s->ctx->next_protos_advertised_cb) | |
727 | { | |
728 | const unsigned char *npa; | |
729 | unsigned int npalen; | |
730 | int r; | |
731 | ||
732 | r = s->ctx->next_protos_advertised_cb(s, &npa, &npalen, s->ctx->next_protos_advertised_cb_arg); | |
733 | if (r == SSL_TLSEXT_ERR_OK) | |
734 | { | |
735 | if ((long)(limit - ret - 4 - npalen) < 0) return NULL; | |
736 | s2n(TLSEXT_TYPE_next_proto_neg,ret); | |
737 | s2n(npalen,ret); | |
738 | memcpy(ret, npa, npalen); | |
739 | ret += npalen; | |
740 | s->s3->next_proto_neg_seen = 1; | |
741 | } | |
742 | } | |
743 | #endif | |
744 | ||
ed3883d2 BM |
745 | if ((extdatalen = ret-p-2)== 0) |
746 | return p; | |
747 | ||
748 | s2n(extdatalen,p); | |
749 | return ret; | |
52b8dad8 | 750 | } |
ed3883d2 | 751 | |
f1fd4544 BM |
752 | int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al) |
753 | { | |
ed3883d2 BM |
754 | unsigned short type; |
755 | unsigned short size; | |
756 | unsigned short len; | |
f1fd4544 | 757 | unsigned char *data = *p; |
860c3dd1 | 758 | int renegotiate_seen = 0; |
6b7be581 | 759 | int sigalg_seen = 0; |
860c3dd1 | 760 | |
a13c20f6 | 761 | s->servername_done = 0; |
67c8e7f4 | 762 | s->tlsext_status_type = -1; |
ed3883d2 BM |
763 | |
764 | if (data >= (d+n-2)) | |
c27c9cb4 | 765 | goto ri_check; |
ed3883d2 BM |
766 | n2s(data,len); |
767 | ||
52b8dad8 | 768 | if (data > (d+n-len)) |
c27c9cb4 | 769 | goto ri_check; |
ed3883d2 | 770 | |
f1fd4544 BM |
771 | while (data <= (d+n-4)) |
772 | { | |
ed3883d2 BM |
773 | n2s(data,type); |
774 | n2s(data,size); | |
775 | ||
776 | if (data+size > (d+n)) | |
c27c9cb4 | 777 | goto ri_check; |
8e3b2dbb | 778 | #if 0 |
0e1dba93 | 779 | fprintf(stderr,"Received extension type %d size %d\n",type,size); |
8e3b2dbb | 780 | #endif |
6434abbf DSH |
781 | if (s->tlsext_debug_cb) |
782 | s->tlsext_debug_cb(s, 0, type, data, size, | |
783 | s->tlsext_debug_arg); | |
a13c20f6 BM |
784 | /* The servername extension is treated as follows: |
785 | ||
786 | - Only the hostname type is supported with a maximum length of 255. | |
787 | - The servername is rejected if too long or if it contains zeros, | |
788 | in which case an fatal alert is generated. | |
789 | - The servername field is maintained together with the session cache. | |
790 | - When a session is resumed, the servername call back invoked in order | |
791 | to allow the application to position itself to the right context. | |
792 | - The servername is acknowledged if it is new for a session or when | |
793 | it is identical to a previously used for the same session. | |
794 | Applications can control the behaviour. They can at any time | |
795 | set a 'desirable' servername for a new SSL object. This can be the | |
796 | case for example with HTTPS when a Host: header field is received and | |
797 | a renegotiation is requested. In this case, a possible servername | |
798 | presented in the new client hello is only acknowledged if it matches | |
799 | the value of the Host: field. | |
800 | - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION | |
801 | if they provide for changing an explicit servername context for the session, | |
802 | i.e. when the session has been established with a servername extension. | |
803 | - On session reconnect, the servername extension may be absent. | |
804 | ||
805 | */ | |
806 | ||
f1fd4544 BM |
807 | if (type == TLSEXT_TYPE_server_name) |
808 | { | |
a70183bc | 809 | unsigned char *sdata; |
ed3883d2 | 810 | int servname_type; |
a70183bc BM |
811 | int dsize; |
812 | ||
813 | if (size < 2) | |
814 | { | |
815 | *al = SSL_AD_DECODE_ERROR; | |
816 | return 0; | |
817 | } | |
818 | n2s(data,dsize); | |
52b8dad8 | 819 | size -= 2; |
a70183bc | 820 | if (dsize > size ) |
f1fd4544 | 821 | { |
a70183bc BM |
822 | *al = SSL_AD_DECODE_ERROR; |
823 | return 0; | |
824 | } | |
825 | ||
826 | sdata = data; | |
827 | while (dsize > 3) | |
828 | { | |
829 | servname_type = *(sdata++); | |
ed3883d2 | 830 | n2s(sdata,len); |
a70183bc BM |
831 | dsize -= 3; |
832 | ||
833 | if (len > dsize) | |
f1fd4544 BM |
834 | { |
835 | *al = SSL_AD_DECODE_ERROR; | |
836 | return 0; | |
837 | } | |
a70183bc | 838 | if (s->servername_done == 0) |
f1fd4544 BM |
839 | switch (servname_type) |
840 | { | |
841 | case TLSEXT_NAMETYPE_host_name: | |
732d31be | 842 | if (!s->hit) |
f1fd4544 | 843 | { |
732d31be DSH |
844 | if(s->session->tlsext_hostname) |
845 | { | |
846 | *al = SSL_AD_DECODE_ERROR; | |
847 | return 0; | |
848 | } | |
849 | if (len > TLSEXT_MAXLEN_host_name) | |
f1fd4544 BM |
850 | { |
851 | *al = TLS1_AD_UNRECOGNIZED_NAME; | |
852 | return 0; | |
853 | } | |
732d31be DSH |
854 | if ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL) |
855 | { | |
856 | *al = TLS1_AD_INTERNAL_ERROR; | |
857 | return 0; | |
858 | } | |
ed3883d2 | 859 | memcpy(s->session->tlsext_hostname, sdata, len); |
a13c20f6 BM |
860 | s->session->tlsext_hostname[len]='\0'; |
861 | if (strlen(s->session->tlsext_hostname) != len) { | |
862 | OPENSSL_free(s->session->tlsext_hostname); | |
40a70628 | 863 | s->session->tlsext_hostname = NULL; |
a13c20f6 BM |
864 | *al = TLS1_AD_UNRECOGNIZED_NAME; |
865 | return 0; | |
f1fd4544 | 866 | } |
a13c20f6 BM |
867 | s->servername_done = 1; |
868 | ||
a13c20f6 BM |
869 | } |
870 | else | |
732d31be DSH |
871 | s->servername_done = s->session->tlsext_hostname |
872 | && strlen(s->session->tlsext_hostname) == len | |
6b9e941e | 873 | && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0; |
a13c20f6 | 874 | |
ed3883d2 | 875 | break; |
f1fd4544 | 876 | |
ed3883d2 BM |
877 | default: |
878 | break; | |
f1fd4544 | 879 | } |
52b8dad8 | 880 | |
a70183bc | 881 | dsize -= len; |
f1fd4544 | 882 | } |
a70183bc BM |
883 | if (dsize != 0) |
884 | { | |
885 | *al = SSL_AD_DECODE_ERROR; | |
886 | return 0; | |
887 | } | |
888 | ||
ed3883d2 | 889 | } |
edc032b5 BL |
890 | #ifndef OPENSSL_NO_SRP |
891 | else if (type == TLSEXT_TYPE_srp) | |
892 | { | |
893 | if (size > 0) | |
894 | { | |
895 | len = data[0]; | |
896 | if ((s->srp_ctx.login = OPENSSL_malloc(len+1)) == NULL) | |
897 | return -1; | |
898 | memcpy(s->srp_ctx.login, &data[1], len); | |
899 | s->srp_ctx.login[len]='\0'; | |
900 | } | |
901 | } | |
902 | #endif | |
ed3883d2 | 903 | |
36ca4ba6 | 904 | #ifndef OPENSSL_NO_EC |
8025e251 DSH |
905 | else if (type == TLSEXT_TYPE_ec_point_formats && |
906 | s->version != DTLS1_VERSION) | |
36ca4ba6 BM |
907 | { |
908 | unsigned char *sdata = data; | |
909 | int ecpointformatlist_length = *(sdata++); | |
36ca4ba6 BM |
910 | |
911 | if (ecpointformatlist_length != size - 1) | |
912 | { | |
913 | *al = TLS1_AD_DECODE_ERROR; | |
914 | return 0; | |
915 | } | |
732d31be | 916 | if (!s->hit) |
36ca4ba6 | 917 | { |
732d31be DSH |
918 | if(s->session->tlsext_ecpointformatlist) |
919 | { | |
7d5686d3 DSH |
920 | OPENSSL_free(s->session->tlsext_ecpointformatlist); |
921 | s->session->tlsext_ecpointformatlist = NULL; | |
732d31be DSH |
922 | } |
923 | s->session->tlsext_ecpointformatlist_length = 0; | |
924 | if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL) | |
925 | { | |
926 | *al = TLS1_AD_INTERNAL_ERROR; | |
927 | return 0; | |
928 | } | |
929 | s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length; | |
930 | memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length); | |
36ca4ba6 | 931 | } |
36ca4ba6 BM |
932 | #if 0 |
933 | fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length); | |
934 | sdata = s->session->tlsext_ecpointformatlist; | |
935 | for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++) | |
936 | fprintf(stderr,"%i ",*(sdata++)); | |
937 | fprintf(stderr,"\n"); | |
33273721 BM |
938 | #endif |
939 | } | |
8025e251 DSH |
940 | else if (type == TLSEXT_TYPE_elliptic_curves && |
941 | s->version != DTLS1_VERSION) | |
33273721 BM |
942 | { |
943 | unsigned char *sdata = data; | |
944 | int ellipticcurvelist_length = (*(sdata++) << 8); | |
945 | ellipticcurvelist_length += (*(sdata++)); | |
946 | ||
947 | if (ellipticcurvelist_length != size - 2) | |
948 | { | |
949 | *al = TLS1_AD_DECODE_ERROR; | |
950 | return 0; | |
951 | } | |
732d31be | 952 | if (!s->hit) |
33273721 | 953 | { |
732d31be DSH |
954 | if(s->session->tlsext_ellipticcurvelist) |
955 | { | |
956 | *al = TLS1_AD_DECODE_ERROR; | |
957 | return 0; | |
958 | } | |
959 | s->session->tlsext_ellipticcurvelist_length = 0; | |
960 | if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL) | |
961 | { | |
962 | *al = TLS1_AD_INTERNAL_ERROR; | |
963 | return 0; | |
964 | } | |
965 | s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length; | |
966 | memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length); | |
33273721 | 967 | } |
33273721 BM |
968 | #if 0 |
969 | fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length); | |
970 | sdata = s->session->tlsext_ellipticcurvelist; | |
971 | for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++) | |
972 | fprintf(stderr,"%i ",*(sdata++)); | |
973 | fprintf(stderr,"\n"); | |
36ca4ba6 BM |
974 | #endif |
975 | } | |
c6a27f01 | 976 | #endif /* OPENSSL_NO_EC */ |
761772d7 | 977 | #ifdef TLSEXT_TYPE_opaque_prf_input |
8025e251 DSH |
978 | else if (type == TLSEXT_TYPE_opaque_prf_input && |
979 | s->version != DTLS1_VERSION) | |
761772d7 BM |
980 | { |
981 | unsigned char *sdata = data; | |
982 | ||
983 | if (size < 2) | |
984 | { | |
985 | *al = SSL_AD_DECODE_ERROR; | |
986 | return 0; | |
987 | } | |
988 | n2s(sdata, s->s3->client_opaque_prf_input_len); | |
989 | if (s->s3->client_opaque_prf_input_len != size - 2) | |
990 | { | |
991 | *al = SSL_AD_DECODE_ERROR; | |
992 | return 0; | |
993 | } | |
994 | ||
995 | if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */ | |
996 | OPENSSL_free(s->s3->client_opaque_prf_input); | |
02c27b11 BM |
997 | if (s->s3->client_opaque_prf_input_len == 0) |
998 | s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */ | |
999 | else | |
1000 | s->s3->client_opaque_prf_input = BUF_memdup(sdata, s->s3->client_opaque_prf_input_len); | |
761772d7 BM |
1001 | if (s->s3->client_opaque_prf_input == NULL) |
1002 | { | |
1003 | *al = TLS1_AD_INTERNAL_ERROR; | |
1004 | return 0; | |
1005 | } | |
1006 | } | |
1007 | #endif | |
12bf56c0 DSH |
1008 | else if (type == TLSEXT_TYPE_session_ticket) |
1009 | { | |
1010 | if (s->tls_session_ticket_ext_cb && | |
1011 | !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg)) | |
1012 | { | |
1013 | *al = TLS1_AD_INTERNAL_ERROR; | |
1014 | return 0; | |
1015 | } | |
1016 | } | |
860c3dd1 DSH |
1017 | else if (type == TLSEXT_TYPE_renegotiate) |
1018 | { | |
1019 | if(!ssl_parse_clienthello_renegotiate_ext(s, data, size, al)) | |
1020 | return 0; | |
1021 | renegotiate_seen = 1; | |
1022 | } | |
6b7be581 DSH |
1023 | else if (type == TLSEXT_TYPE_signature_algorithms) |
1024 | { | |
1025 | int dsize; | |
1026 | if (sigalg_seen || size < 2) | |
1027 | { | |
1028 | *al = SSL_AD_DECODE_ERROR; | |
1029 | return 0; | |
1030 | } | |
1031 | sigalg_seen = 1; | |
1032 | n2s(data,dsize); | |
1033 | size -= 2; | |
1034 | if (dsize != size || dsize & 1) | |
1035 | { | |
1036 | *al = SSL_AD_DECODE_ERROR; | |
1037 | return 0; | |
1038 | } | |
1039 | if (!tls1_process_sigalgs(s, data, dsize)) | |
1040 | { | |
1041 | *al = SSL_AD_DECODE_ERROR; | |
1042 | return 0; | |
1043 | } | |
1044 | } | |
8025e251 DSH |
1045 | else if (type == TLSEXT_TYPE_status_request && |
1046 | s->version != DTLS1_VERSION && s->ctx->tlsext_status_cb) | |
67c8e7f4 DSH |
1047 | { |
1048 | ||
1049 | if (size < 5) | |
1050 | { | |
1051 | *al = SSL_AD_DECODE_ERROR; | |
1052 | return 0; | |
1053 | } | |
1054 | ||
1055 | s->tlsext_status_type = *data++; | |
1056 | size--; | |
1057 | if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp) | |
1058 | { | |
1059 | const unsigned char *sdata; | |
1060 | int dsize; | |
1061 | /* Read in responder_id_list */ | |
1062 | n2s(data,dsize); | |
1063 | size -= 2; | |
1064 | if (dsize > size ) | |
1065 | { | |
1066 | *al = SSL_AD_DECODE_ERROR; | |
1067 | return 0; | |
1068 | } | |
1069 | while (dsize > 0) | |
1070 | { | |
1071 | OCSP_RESPID *id; | |
1072 | int idsize; | |
1073 | if (dsize < 4) | |
1074 | { | |
1075 | *al = SSL_AD_DECODE_ERROR; | |
1076 | return 0; | |
1077 | } | |
1078 | n2s(data, idsize); | |
1079 | dsize -= 2 + idsize; | |
9770924f | 1080 | size -= 2 + idsize; |
67c8e7f4 DSH |
1081 | if (dsize < 0) |
1082 | { | |
1083 | *al = SSL_AD_DECODE_ERROR; | |
1084 | return 0; | |
1085 | } | |
1086 | sdata = data; | |
1087 | data += idsize; | |
1088 | id = d2i_OCSP_RESPID(NULL, | |
1089 | &sdata, idsize); | |
1090 | if (!id) | |
1091 | { | |
1092 | *al = SSL_AD_DECODE_ERROR; | |
1093 | return 0; | |
1094 | } | |
1095 | if (data != sdata) | |
1096 | { | |
1097 | OCSP_RESPID_free(id); | |
1098 | *al = SSL_AD_DECODE_ERROR; | |
1099 | return 0; | |
1100 | } | |
1101 | if (!s->tlsext_ocsp_ids | |
1102 | && !(s->tlsext_ocsp_ids = | |
1103 | sk_OCSP_RESPID_new_null())) | |
1104 | { | |
1105 | OCSP_RESPID_free(id); | |
1106 | *al = SSL_AD_INTERNAL_ERROR; | |
1107 | return 0; | |
1108 | } | |
1109 | if (!sk_OCSP_RESPID_push( | |
1110 | s->tlsext_ocsp_ids, id)) | |
1111 | { | |
1112 | OCSP_RESPID_free(id); | |
1113 | *al = SSL_AD_INTERNAL_ERROR; | |
1114 | return 0; | |
1115 | } | |
1116 | } | |
1117 | ||
1118 | /* Read in request_extensions */ | |
9770924f BM |
1119 | if (size < 2) |
1120 | { | |
1121 | *al = SSL_AD_DECODE_ERROR; | |
1122 | return 0; | |
1123 | } | |
67c8e7f4 DSH |
1124 | n2s(data,dsize); |
1125 | size -= 2; | |
9770924f | 1126 | if (dsize != size) |
67c8e7f4 DSH |
1127 | { |
1128 | *al = SSL_AD_DECODE_ERROR; | |
1129 | return 0; | |
1130 | } | |
1131 | sdata = data; | |
1132 | if (dsize > 0) | |
1133 | { | |
1134 | s->tlsext_ocsp_exts = | |
1135 | d2i_X509_EXTENSIONS(NULL, | |
1136 | &sdata, dsize); | |
1137 | if (!s->tlsext_ocsp_exts | |
1138 | || (data + dsize != sdata)) | |
1139 | { | |
1140 | *al = SSL_AD_DECODE_ERROR; | |
1141 | return 0; | |
1142 | } | |
1143 | } | |
1144 | } | |
1145 | /* We don't know what to do with any other type | |
1146 | * so ignore it. | |
1147 | */ | |
1148 | else | |
1149 | s->tlsext_status_type = -1; | |
1150 | } | |
bf48836c | 1151 | #ifndef OPENSSL_NO_NEXTPROTONEG |
ee2ffc27 BL |
1152 | else if (type == TLSEXT_TYPE_next_proto_neg && |
1153 | s->s3->tmp.finish_md_len == 0) | |
1154 | { | |
1155 | /* We shouldn't accept this extension on a | |
1156 | * renegotiation. | |
1157 | * | |
1158 | * s->new_session will be set on renegotiation, but we | |
1159 | * probably shouldn't rely that it couldn't be set on | |
1160 | * the initial renegotation too in certain cases (when | |
1161 | * there's some other reason to disallow resuming an | |
1162 | * earlier session -- the current code won't be doing | |
1163 | * anything like that, but this might change). | |
1164 | ||
1165 | * A valid sign that there's been a previous handshake | |
1166 | * in this connection is if s->s3->tmp.finish_md_len > | |
1167 | * 0. (We are talking about a check that will happen | |
1168 | * in the Hello protocol round, well before a new | |
1169 | * Finished message could have been computed.) */ | |
1170 | s->s3->next_proto_neg_seen = 1; | |
1171 | } | |
1172 | #endif | |
761772d7 | 1173 | |
6434abbf DSH |
1174 | /* session ticket processed earlier */ |
1175 | data+=size; | |
f1fd4544 | 1176 | } |
6434abbf | 1177 | |
f1fd4544 | 1178 | *p = data; |
c27c9cb4 DSH |
1179 | |
1180 | ri_check: | |
1181 | ||
1182 | /* Need RI if renegotiating */ | |
1183 | ||
bdd53508 | 1184 | if (!renegotiate_seen && s->renegotiate && |
c27c9cb4 DSH |
1185 | !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) |
1186 | { | |
fbed9f81 | 1187 | *al = SSL_AD_HANDSHAKE_FAILURE; |
c27c9cb4 DSH |
1188 | SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT, |
1189 | SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED); | |
1190 | return 0; | |
1191 | } | |
1192 | ||
f1fd4544 | 1193 | return 1; |
52b8dad8 | 1194 | } |
f1fd4544 | 1195 | |
bf48836c | 1196 | #ifndef OPENSSL_NO_NEXTPROTONEG |
ee2ffc27 BL |
1197 | /* ssl_next_proto_validate validates a Next Protocol Negotiation block. No |
1198 | * elements of zero length are allowed and the set of elements must exactly fill | |
1199 | * the length of the block. */ | |
bf48836c | 1200 | static int ssl_next_proto_validate(unsigned char *d, unsigned len) |
ee2ffc27 BL |
1201 | { |
1202 | unsigned int off = 0; | |
1203 | ||
1204 | while (off < len) | |
1205 | { | |
1206 | if (d[off] == 0) | |
1207 | return 0; | |
1208 | off += d[off]; | |
1209 | off++; | |
1210 | } | |
1211 | ||
1212 | return off == len; | |
1213 | } | |
1214 | #endif | |
1215 | ||
f1fd4544 BM |
1216 | int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al) |
1217 | { | |
c8bbd98a | 1218 | unsigned short length; |
ed3883d2 BM |
1219 | unsigned short type; |
1220 | unsigned short size; | |
ed3883d2 | 1221 | unsigned char *data = *p; |
ed3883d2 | 1222 | int tlsext_servername = 0; |
860c3dd1 | 1223 | int renegotiate_seen = 0; |
ed3883d2 BM |
1224 | |
1225 | if (data >= (d+n-2)) | |
c27c9cb4 | 1226 | goto ri_check; |
ed3883d2 | 1227 | |
c8bbd98a BL |
1228 | n2s(data,length); |
1229 | if (data+length != d+n) | |
1230 | { | |
1231 | *al = SSL_AD_DECODE_ERROR; | |
1232 | return 0; | |
1233 | } | |
ed3883d2 | 1234 | |
f1fd4544 BM |
1235 | while(data <= (d+n-4)) |
1236 | { | |
ed3883d2 BM |
1237 | n2s(data,type); |
1238 | n2s(data,size); | |
1239 | ||
1240 | if (data+size > (d+n)) | |
c27c9cb4 | 1241 | goto ri_check; |
f1fd4544 | 1242 | |
6434abbf DSH |
1243 | if (s->tlsext_debug_cb) |
1244 | s->tlsext_debug_cb(s, 1, type, data, size, | |
1245 | s->tlsext_debug_arg); | |
1246 | ||
f1fd4544 BM |
1247 | if (type == TLSEXT_TYPE_server_name) |
1248 | { | |
1249 | if (s->tlsext_hostname == NULL || size > 0) | |
1250 | { | |
1251 | *al = TLS1_AD_UNRECOGNIZED_NAME; | |
1252 | return 0; | |
1253 | } | |
ed3883d2 | 1254 | tlsext_servername = 1; |
f1fd4544 | 1255 | } |
ed3883d2 | 1256 | |
36ca4ba6 | 1257 | #ifndef OPENSSL_NO_EC |
8025e251 DSH |
1258 | else if (type == TLSEXT_TYPE_ec_point_formats && |
1259 | s->version != DTLS1_VERSION) | |
36ca4ba6 BM |
1260 | { |
1261 | unsigned char *sdata = data; | |
1262 | int ecpointformatlist_length = *(sdata++); | |
36ca4ba6 BM |
1263 | |
1264 | if (ecpointformatlist_length != size - 1) | |
1265 | { | |
1266 | *al = TLS1_AD_DECODE_ERROR; | |
1267 | return 0; | |
1268 | } | |
1269 | s->session->tlsext_ecpointformatlist_length = 0; | |
b6acb8d0 | 1270 | if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist); |
36ca4ba6 BM |
1271 | if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL) |
1272 | { | |
1273 | *al = TLS1_AD_INTERNAL_ERROR; | |
1274 | return 0; | |
1275 | } | |
1276 | s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length; | |
1277 | memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length); | |
1278 | #if 0 | |
1279 | fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist "); | |
1280 | sdata = s->session->tlsext_ecpointformatlist; | |
1281 | for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++) | |
1282 | fprintf(stderr,"%i ",*(sdata++)); | |
1283 | fprintf(stderr,"\n"); | |
1284 | #endif | |
1285 | } | |
c6a27f01 | 1286 | #endif /* OPENSSL_NO_EC */ |
6434abbf DSH |
1287 | |
1288 | else if (type == TLSEXT_TYPE_session_ticket) | |
1289 | { | |
12bf56c0 DSH |
1290 | if (s->tls_session_ticket_ext_cb && |
1291 | !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg)) | |
1292 | { | |
1293 | *al = TLS1_AD_INTERNAL_ERROR; | |
1294 | return 0; | |
1295 | } | |
6434abbf DSH |
1296 | if ((SSL_get_options(s) & SSL_OP_NO_TICKET) |
1297 | || (size > 0)) | |
1298 | { | |
1299 | *al = TLS1_AD_UNSUPPORTED_EXTENSION; | |
1300 | return 0; | |
1301 | } | |
1302 | s->tlsext_ticket_expected = 1; | |
1303 | } | |
761772d7 | 1304 | #ifdef TLSEXT_TYPE_opaque_prf_input |
8025e251 DSH |
1305 | else if (type == TLSEXT_TYPE_opaque_prf_input && |
1306 | s->version != DTLS1_VERSION) | |
761772d7 BM |
1307 | { |
1308 | unsigned char *sdata = data; | |
1309 | ||
1310 | if (size < 2) | |
1311 | { | |
1312 | *al = SSL_AD_DECODE_ERROR; | |
1313 | return 0; | |
1314 | } | |
1315 | n2s(sdata, s->s3->server_opaque_prf_input_len); | |
1316 | if (s->s3->server_opaque_prf_input_len != size - 2) | |
1317 | { | |
1318 | *al = SSL_AD_DECODE_ERROR; | |
1319 | return 0; | |
1320 | } | |
1321 | ||
1322 | if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */ | |
1323 | OPENSSL_free(s->s3->server_opaque_prf_input); | |
02c27b11 BM |
1324 | if (s->s3->server_opaque_prf_input_len == 0) |
1325 | s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */ | |
1326 | else | |
1327 | s->s3->server_opaque_prf_input = BUF_memdup(sdata, s->s3->server_opaque_prf_input_len); | |
761772d7 BM |
1328 | |
1329 | if (s->s3->server_opaque_prf_input == NULL) | |
1330 | { | |
1331 | *al = TLS1_AD_INTERNAL_ERROR; | |
1332 | return 0; | |
1333 | } | |
1334 | } | |
1335 | #endif | |
8025e251 DSH |
1336 | else if (type == TLSEXT_TYPE_status_request && |
1337 | s->version != DTLS1_VERSION) | |
67c8e7f4 DSH |
1338 | { |
1339 | /* MUST be empty and only sent if we've requested | |
1340 | * a status request message. | |
1341 | */ | |
1342 | if ((s->tlsext_status_type == -1) || (size > 0)) | |
1343 | { | |
1344 | *al = TLS1_AD_UNSUPPORTED_EXTENSION; | |
1345 | return 0; | |
1346 | } | |
1347 | /* Set flag to expect CertificateStatus message */ | |
1348 | s->tlsext_status_expected = 1; | |
1349 | } | |
bf48836c | 1350 | #ifndef OPENSSL_NO_NEXTPROTONEG |
ee2ffc27 BL |
1351 | else if (type == TLSEXT_TYPE_next_proto_neg) |
1352 | { | |
1353 | unsigned char *selected; | |
1354 | unsigned char selected_len; | |
1355 | ||
1356 | /* We must have requested it. */ | |
1357 | if ((s->ctx->next_proto_select_cb == NULL)) | |
1358 | { | |
1359 | *al = TLS1_AD_UNSUPPORTED_EXTENSION; | |
1360 | return 0; | |
1361 | } | |
1362 | /* The data must be valid */ | |
1363 | if (!ssl_next_proto_validate(data, size)) | |
1364 | { | |
1365 | *al = TLS1_AD_DECODE_ERROR; | |
1366 | return 0; | |
1367 | } | |
1368 | if (s->ctx->next_proto_select_cb(s, &selected, &selected_len, data, size, s->ctx->next_proto_select_cb_arg) != SSL_TLSEXT_ERR_OK) | |
1369 | { | |
1370 | *al = TLS1_AD_INTERNAL_ERROR; | |
1371 | return 0; | |
1372 | } | |
1373 | s->next_proto_negotiated = OPENSSL_malloc(selected_len); | |
1374 | if (!s->next_proto_negotiated) | |
1375 | { | |
1376 | *al = TLS1_AD_INTERNAL_ERROR; | |
1377 | return 0; | |
1378 | } | |
1379 | memcpy(s->next_proto_negotiated, selected, selected_len); | |
1380 | s->next_proto_negotiated_len = selected_len; | |
1381 | } | |
1382 | #endif | |
860c3dd1 DSH |
1383 | else if (type == TLSEXT_TYPE_renegotiate) |
1384 | { | |
1385 | if(!ssl_parse_serverhello_renegotiate_ext(s, data, size, al)) | |
1386 | return 0; | |
1387 | renegotiate_seen = 1; | |
1388 | } | |
ed3883d2 | 1389 | data+=size; |
f1fd4544 | 1390 | } |
ed3883d2 BM |
1391 | |
1392 | if (data != d+n) | |
f1fd4544 BM |
1393 | { |
1394 | *al = SSL_AD_DECODE_ERROR; | |
1395 | return 0; | |
1396 | } | |
ed3883d2 | 1397 | |
f1fd4544 BM |
1398 | if (!s->hit && tlsext_servername == 1) |
1399 | { | |
1400 | if (s->tlsext_hostname) | |
1401 | { | |
1402 | if (s->session->tlsext_hostname == NULL) | |
1403 | { | |
ed3883d2 BM |
1404 | s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname); |
1405 | if (!s->session->tlsext_hostname) | |
f1fd4544 BM |
1406 | { |
1407 | *al = SSL_AD_UNRECOGNIZED_NAME; | |
1408 | return 0; | |
1409 | } | |
1410 | } | |
1411 | else | |
1412 | { | |
1413 | *al = SSL_AD_DECODE_ERROR; | |
1414 | return 0; | |
1415 | } | |
ed3883d2 | 1416 | } |
f1fd4544 | 1417 | } |
ed3883d2 | 1418 | |
f1fd4544 | 1419 | *p = data; |
c27c9cb4 DSH |
1420 | |
1421 | ri_check: | |
1422 | ||
1423 | /* Determine if we need to see RI. Strictly speaking if we want to | |
1424 | * avoid an attack we should *always* see RI even on initial server | |
1425 | * hello because the client doesn't see any renegotiation during an | |
1426 | * attack. However this would mean we could not connect to any server | |
1427 | * which doesn't support RI so for the immediate future tolerate RI | |
1428 | * absence on initial connect only. | |
1429 | */ | |
c2c49969 DSH |
1430 | if (!renegotiate_seen |
1431 | && !(s->options & SSL_OP_LEGACY_SERVER_CONNECT) | |
ef51b4b9 | 1432 | && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) |
c27c9cb4 | 1433 | { |
fbed9f81 | 1434 | *al = SSL_AD_HANDSHAKE_FAILURE; |
c27c9cb4 DSH |
1435 | SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT, |
1436 | SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED); | |
1437 | return 0; | |
1438 | } | |
1439 | ||
f1fd4544 | 1440 | return 1; |
52b8dad8 | 1441 | } |
ed3883d2 | 1442 | |
b2172f4f | 1443 | |
36ca4ba6 BM |
1444 | int ssl_prepare_clienthello_tlsext(SSL *s) |
1445 | { | |
1446 | #ifndef OPENSSL_NO_EC | |
33273721 BM |
1447 | /* If we are client and using an elliptic curve cryptography cipher suite, send the point formats |
1448 | * and elliptic curves we support. | |
36ca4ba6 BM |
1449 | */ |
1450 | int using_ecc = 0; | |
1451 | int i; | |
33273721 | 1452 | unsigned char *j; |
52b8dad8 | 1453 | unsigned long alg_k, alg_a; |
36ca4ba6 | 1454 | STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s); |
52b8dad8 | 1455 | |
36ca4ba6 BM |
1456 | for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++) |
1457 | { | |
52b8dad8 BM |
1458 | SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i); |
1459 | ||
1460 | alg_k = c->algorithm_mkey; | |
1461 | alg_a = c->algorithm_auth; | |
1462 | if ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe) || (alg_a & SSL_aECDSA))) | |
36ca4ba6 BM |
1463 | { |
1464 | using_ecc = 1; | |
1465 | break; | |
1466 | } | |
36ca4ba6 | 1467 | } |
290be870 | 1468 | using_ecc = using_ecc && (s->version >= TLS1_VERSION); |
36ca4ba6 BM |
1469 | if (using_ecc) |
1470 | { | |
b6acb8d0 BM |
1471 | if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist); |
1472 | if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL) | |
36ca4ba6 | 1473 | { |
a291745e | 1474 | SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE); |
36ca4ba6 BM |
1475 | return -1; |
1476 | } | |
b6acb8d0 BM |
1477 | s->tlsext_ecpointformatlist_length = 3; |
1478 | s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed; | |
1479 | s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime; | |
1480 | s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2; | |
b2172f4f | 1481 | |
33273721 BM |
1482 | /* we support all named elliptic curves in draft-ietf-tls-ecc-12 */ |
1483 | if (s->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->tlsext_ellipticcurvelist); | |
b2172f4f BM |
1484 | s->tlsext_ellipticcurvelist_length = sizeof(nid_list)/sizeof(nid_list[0]) * 2; |
1485 | if ((s->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL) | |
33273721 | 1486 | { |
b2172f4f | 1487 | s->tlsext_ellipticcurvelist_length = 0; |
a291745e | 1488 | SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE); |
33273721 BM |
1489 | return -1; |
1490 | } | |
1e26a8ba GT |
1491 | for (i = 1, j = s->tlsext_ellipticcurvelist; (unsigned int)i <= |
1492 | sizeof(nid_list)/sizeof(nid_list[0]); i++) | |
b2172f4f | 1493 | s2n(i,j); |
36ca4ba6 BM |
1494 | } |
1495 | #endif /* OPENSSL_NO_EC */ | |
761772d7 BM |
1496 | |
1497 | #ifdef TLSEXT_TYPE_opaque_prf_input | |
1498 | { | |
1499 | int r = 1; | |
1500 | ||
1501 | if (s->ctx->tlsext_opaque_prf_input_callback != 0) | |
1502 | { | |
1503 | r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg); | |
1504 | if (!r) | |
1505 | return -1; | |
1506 | } | |
1507 | ||
1508 | if (s->tlsext_opaque_prf_input != NULL) | |
1509 | { | |
1510 | if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */ | |
1511 | OPENSSL_free(s->s3->client_opaque_prf_input); | |
1512 | ||
02c27b11 BM |
1513 | if (s->tlsext_opaque_prf_input_len == 0) |
1514 | s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */ | |
1515 | else | |
1516 | s->s3->client_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len); | |
761772d7 BM |
1517 | if (s->s3->client_opaque_prf_input == NULL) |
1518 | { | |
1519 | SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE); | |
1520 | return -1; | |
1521 | } | |
1522 | s->s3->client_opaque_prf_input_len = s->tlsext_opaque_prf_input_len; | |
1523 | } | |
1524 | ||
1525 | if (r == 2) | |
1526 | /* at callback's request, insist on receiving an appropriate server opaque PRF input */ | |
1527 | s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len; | |
1528 | } | |
1529 | #endif | |
1530 | ||
36ca4ba6 | 1531 | return 1; |
52b8dad8 | 1532 | } |
36ca4ba6 BM |
1533 | |
1534 | int ssl_prepare_serverhello_tlsext(SSL *s) | |
1535 | { | |
1536 | #ifndef OPENSSL_NO_EC | |
b6acb8d0 | 1537 | /* If we are server and using an ECC cipher suite, send the point formats we support |
33273721 BM |
1538 | * if the client sent us an ECPointsFormat extension. Note that the server is not |
1539 | * supposed to send an EllipticCurves extension. | |
36ca4ba6 | 1540 | */ |
36ca4ba6 | 1541 | |
52b8dad8 BM |
1542 | unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
1543 | unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
1544 | int using_ecc = (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA); | |
1545 | using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL); | |
1546 | ||
36ca4ba6 BM |
1547 | if (using_ecc) |
1548 | { | |
b6acb8d0 BM |
1549 | if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist); |
1550 | if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL) | |
36ca4ba6 | 1551 | { |
a291745e | 1552 | SSLerr(SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE); |
36ca4ba6 BM |
1553 | return -1; |
1554 | } | |
b6acb8d0 BM |
1555 | s->tlsext_ecpointformatlist_length = 3; |
1556 | s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed; | |
1557 | s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime; | |
1558 | s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2; | |
36ca4ba6 BM |
1559 | } |
1560 | #endif /* OPENSSL_NO_EC */ | |
761772d7 | 1561 | |
36ca4ba6 | 1562 | return 1; |
52b8dad8 | 1563 | } |
36ca4ba6 BM |
1564 | |
1565 | int ssl_check_clienthello_tlsext(SSL *s) | |
f1fd4544 | 1566 | { |
241520e6 | 1567 | int ret=SSL_TLSEXT_ERR_NOACK; |
36ca4ba6 BM |
1568 | int al = SSL_AD_UNRECOGNIZED_NAME; |
1569 | ||
1570 | #ifndef OPENSSL_NO_EC | |
33273721 BM |
1571 | /* The handling of the ECPointFormats extension is done elsewhere, namely in |
1572 | * ssl3_choose_cipher in s3_lib.c. | |
1573 | */ | |
1574 | /* The handling of the EllipticCurves extension is done elsewhere, namely in | |
1575 | * ssl3_choose_cipher in s3_lib.c. | |
36ca4ba6 BM |
1576 | */ |
1577 | #endif | |
1578 | ||
1579 | if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0) | |
1580 | ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg); | |
1581 | else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0) | |
1582 | ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg); | |
1583 | ||
67c8e7f4 DSH |
1584 | /* If status request then ask callback what to do. |
1585 | * Note: this must be called after servername callbacks in case | |
1586 | * the certificate has changed. | |
1587 | */ | |
2bd45dc9 | 1588 | if ((s->tlsext_status_type != -1) && s->ctx && s->ctx->tlsext_status_cb) |
67c8e7f4 DSH |
1589 | { |
1590 | int r; | |
1591 | r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); | |
1592 | switch (r) | |
1593 | { | |
1594 | /* We don't want to send a status request response */ | |
1595 | case SSL_TLSEXT_ERR_NOACK: | |
1596 | s->tlsext_status_expected = 0; | |
1597 | break; | |
1598 | /* status request response should be sent */ | |
1599 | case SSL_TLSEXT_ERR_OK: | |
1600 | if (s->tlsext_ocsp_resp) | |
1601 | s->tlsext_status_expected = 1; | |
1602 | else | |
1603 | s->tlsext_status_expected = 0; | |
1604 | break; | |
1605 | /* something bad happened */ | |
1606 | case SSL_TLSEXT_ERR_ALERT_FATAL: | |
1607 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
1608 | al = SSL_AD_INTERNAL_ERROR; | |
1609 | goto err; | |
1610 | } | |
1611 | } | |
1612 | else | |
1613 | s->tlsext_status_expected = 0; | |
761772d7 BM |
1614 | |
1615 | #ifdef TLSEXT_TYPE_opaque_prf_input | |
1616 | { | |
1617 | /* This sort of belongs into ssl_prepare_serverhello_tlsext(), | |
1618 | * but we might be sending an alert in response to the client hello, | |
1619 | * so this has to happen here in ssl_check_clienthello_tlsext(). */ | |
1620 | ||
1621 | int r = 1; | |
1622 | ||
1623 | if (s->ctx->tlsext_opaque_prf_input_callback != 0) | |
1624 | { | |
1625 | r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg); | |
1626 | if (!r) | |
1627 | { | |
1628 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
1629 | al = SSL_AD_INTERNAL_ERROR; | |
1630 | goto err; | |
1631 | } | |
1632 | } | |
1633 | ||
1634 | if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */ | |
1635 | OPENSSL_free(s->s3->server_opaque_prf_input); | |
1636 | s->s3->server_opaque_prf_input = NULL; | |
1637 | ||
1638 | if (s->tlsext_opaque_prf_input != NULL) | |
1639 | { | |
1640 | if (s->s3->client_opaque_prf_input != NULL && | |
1641 | s->s3->client_opaque_prf_input_len == s->tlsext_opaque_prf_input_len) | |
1642 | { | |
1643 | /* can only use this extension if we have a server opaque PRF input | |
1644 | * of the same length as the client opaque PRF input! */ | |
1645 | ||
02c27b11 BM |
1646 | if (s->tlsext_opaque_prf_input_len == 0) |
1647 | s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */ | |
1648 | else | |
1649 | s->s3->server_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len); | |
761772d7 BM |
1650 | if (s->s3->server_opaque_prf_input == NULL) |
1651 | { | |
1652 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
1653 | al = SSL_AD_INTERNAL_ERROR; | |
1654 | goto err; | |
1655 | } | |
1656 | s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len; | |
1657 | } | |
1658 | } | |
1659 | ||
1660 | if (r == 2 && s->s3->server_opaque_prf_input == NULL) | |
1661 | { | |
1662 | /* The callback wants to enforce use of the extension, | |
1663 | * but we can't do that with the client opaque PRF input; | |
1664 | * abort the handshake. | |
1665 | */ | |
1666 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
1667 | al = SSL_AD_HANDSHAKE_FAILURE; | |
1668 | } | |
1669 | } | |
761772d7 | 1670 | |
67c8e7f4 | 1671 | #endif |
761772d7 | 1672 | err: |
52b8dad8 BM |
1673 | switch (ret) |
1674 | { | |
36ca4ba6 BM |
1675 | case SSL_TLSEXT_ERR_ALERT_FATAL: |
1676 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1677 | return -1; | |
1678 | ||
1679 | case SSL_TLSEXT_ERR_ALERT_WARNING: | |
1680 | ssl3_send_alert(s,SSL3_AL_WARNING,al); | |
1681 | return 1; | |
1682 | ||
1683 | case SSL_TLSEXT_ERR_NOACK: | |
1684 | s->servername_done=0; | |
1685 | default: | |
1686 | return 1; | |
52b8dad8 | 1687 | } |
36ca4ba6 | 1688 | } |
f1fd4544 | 1689 | |
36ca4ba6 BM |
1690 | int ssl_check_serverhello_tlsext(SSL *s) |
1691 | { | |
1692 | int ret=SSL_TLSEXT_ERR_NOACK; | |
58ece833 | 1693 | int al = SSL_AD_UNRECOGNIZED_NAME; |
241520e6 | 1694 | |
36ca4ba6 | 1695 | #ifndef OPENSSL_NO_EC |
d0205686 DSH |
1696 | /* If we are client and using an elliptic curve cryptography cipher |
1697 | * suite, then if server returns an EC point formats lists extension | |
1698 | * it must contain uncompressed. | |
36ca4ba6 | 1699 | */ |
52b8dad8 BM |
1700 | unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
1701 | unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
36ca4ba6 | 1702 | if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) && |
d0205686 | 1703 | (s->session->tlsext_ecpointformatlist != NULL) && (s->session->tlsext_ecpointformatlist_length > 0) && |
52b8dad8 | 1704 | ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA))) |
36ca4ba6 BM |
1705 | { |
1706 | /* we are using an ECC cipher */ | |
90bdfd97 | 1707 | size_t i; |
36ca4ba6 BM |
1708 | unsigned char *list; |
1709 | int found_uncompressed = 0; | |
b9865f11 | 1710 | list = s->session->tlsext_ecpointformatlist; |
36ca4ba6 BM |
1711 | for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++) |
1712 | { | |
1713 | if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed) | |
1714 | { | |
1715 | found_uncompressed = 1; | |
1716 | break; | |
1717 | } | |
1718 | } | |
1719 | if (!found_uncompressed) | |
1720 | { | |
a291745e | 1721 | SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST); |
36ca4ba6 BM |
1722 | return -1; |
1723 | } | |
1724 | } | |
1725 | ret = SSL_TLSEXT_ERR_OK; | |
1726 | #endif /* OPENSSL_NO_EC */ | |
1727 | ||
241520e6 | 1728 | if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0) |
58ece833 | 1729 | ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg); |
241520e6 | 1730 | else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0) |
58ece833 | 1731 | ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg); |
241520e6 | 1732 | |
761772d7 BM |
1733 | #ifdef TLSEXT_TYPE_opaque_prf_input |
1734 | if (s->s3->server_opaque_prf_input_len > 0) | |
1735 | { | |
1736 | /* This case may indicate that we, as a client, want to insist on using opaque PRF inputs. | |
1737 | * So first verify that we really have a value from the server too. */ | |
1738 | ||
1739 | if (s->s3->server_opaque_prf_input == NULL) | |
1740 | { | |
1741 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
1742 | al = SSL_AD_HANDSHAKE_FAILURE; | |
1743 | } | |
1744 | ||
1745 | /* Anytime the server *has* sent an opaque PRF input, we need to check | |
1746 | * that we have a client opaque PRF input of the same size. */ | |
1747 | if (s->s3->client_opaque_prf_input == NULL || | |
1748 | s->s3->client_opaque_prf_input_len != s->s3->server_opaque_prf_input_len) | |
1749 | { | |
1750 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
1751 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1752 | } | |
1753 | } | |
1754 | #endif | |
1755 | ||
04e2ab2c DSH |
1756 | /* If we've requested certificate status and we wont get one |
1757 | * tell the callback | |
1758 | */ | |
1759 | if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected) | |
121f9e74 | 1760 | && s->ctx && s->ctx->tlsext_status_cb) |
04e2ab2c DSH |
1761 | { |
1762 | int r; | |
1763 | /* Set resp to NULL, resplen to -1 so callback knows | |
1764 | * there is no response. | |
1765 | */ | |
1766 | if (s->tlsext_ocsp_resp) | |
1767 | { | |
1768 | OPENSSL_free(s->tlsext_ocsp_resp); | |
1769 | s->tlsext_ocsp_resp = NULL; | |
1770 | } | |
1771 | s->tlsext_ocsp_resplen = -1; | |
1772 | r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); | |
1773 | if (r == 0) | |
1774 | { | |
1775 | al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; | |
1776 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
1777 | } | |
1778 | if (r < 0) | |
1779 | { | |
1780 | al = SSL_AD_INTERNAL_ERROR; | |
1781 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; | |
1782 | } | |
1783 | } | |
1784 | ||
52b8dad8 BM |
1785 | switch (ret) |
1786 | { | |
58ece833 BM |
1787 | case SSL_TLSEXT_ERR_ALERT_FATAL: |
1788 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1789 | return -1; | |
1790 | ||
1791 | case SSL_TLSEXT_ERR_ALERT_WARNING: | |
1792 | ssl3_send_alert(s,SSL3_AL_WARNING,al); | |
1793 | return 1; | |
1794 | ||
1795 | case SSL_TLSEXT_ERR_NOACK: | |
1796 | s->servername_done=0; | |
1797 | default: | |
1798 | return 1; | |
52b8dad8 | 1799 | } |
f1fd4544 | 1800 | } |
33273721 | 1801 | |
6434abbf DSH |
1802 | /* Since the server cache lookup is done early on in the processing of client |
1803 | * hello and other operations depend on the result we need to handle any TLS | |
1804 | * session ticket extension at the same time. | |
1805 | */ | |
1806 | ||
1807 | int tls1_process_ticket(SSL *s, unsigned char *session_id, int len, | |
1808 | const unsigned char *limit, SSL_SESSION **ret) | |
1809 | { | |
1810 | /* Point after session ID in client hello */ | |
1811 | const unsigned char *p = session_id + len; | |
1812 | unsigned short i; | |
e8da6a1d DSH |
1813 | |
1814 | /* If tickets disabled behave as if no ticket present | |
1815 | * to permit stateful resumption. | |
1816 | */ | |
1817 | if (SSL_get_options(s) & SSL_OP_NO_TICKET) | |
1818 | return 1; | |
1819 | ||
6434abbf DSH |
1820 | if ((s->version <= SSL3_VERSION) || !limit) |
1821 | return 1; | |
1822 | if (p >= limit) | |
1823 | return -1; | |
07a9d1a2 DSH |
1824 | /* Skip past DTLS cookie */ |
1825 | if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER) | |
1826 | { | |
1827 | i = *(p++); | |
1828 | p+= i; | |
1829 | if (p >= limit) | |
1830 | return -1; | |
1831 | } | |
6434abbf DSH |
1832 | /* Skip past cipher list */ |
1833 | n2s(p, i); | |
1834 | p+= i; | |
1835 | if (p >= limit) | |
1836 | return -1; | |
1837 | /* Skip past compression algorithm list */ | |
1838 | i = *(p++); | |
1839 | p += i; | |
1840 | if (p > limit) | |
1841 | return -1; | |
1842 | /* Now at start of extensions */ | |
1843 | if ((p + 2) >= limit) | |
1844 | return 1; | |
1845 | n2s(p, i); | |
1846 | while ((p + 4) <= limit) | |
1847 | { | |
1848 | unsigned short type, size; | |
1849 | n2s(p, type); | |
1850 | n2s(p, size); | |
1851 | if (p + size > limit) | |
1852 | return 1; | |
1853 | if (type == TLSEXT_TYPE_session_ticket) | |
1854 | { | |
1855 | /* If tickets disabled indicate cache miss which will | |
1856 | * trigger a full handshake | |
1857 | */ | |
1858 | if (SSL_get_options(s) & SSL_OP_NO_TICKET) | |
e8da6a1d DSH |
1859 | return 1; |
1860 | /* If zero length note client will accept a ticket | |
6434abbf DSH |
1861 | * and indicate cache miss to trigger full handshake |
1862 | */ | |
1863 | if (size == 0) | |
1864 | { | |
1865 | s->tlsext_ticket_expected = 1; | |
1866 | return 0; /* Cache miss */ | |
1867 | } | |
12bf56c0 DSH |
1868 | if (s->tls_session_secret_cb) |
1869 | { | |
1870 | /* Indicate cache miss here and instead of | |
1871 | * generating the session from ticket now, | |
1872 | * trigger abbreviated handshake based on | |
1873 | * external mechanism to calculate the master | |
1874 | * secret later. */ | |
1875 | return 0; | |
1876 | } | |
6434abbf DSH |
1877 | return tls_decrypt_ticket(s, p, size, session_id, len, |
1878 | ret); | |
1879 | } | |
1880 | p += size; | |
1881 | } | |
1882 | return 1; | |
1883 | } | |
1884 | ||
1885 | static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen, | |
1886 | const unsigned char *sess_id, int sesslen, | |
1887 | SSL_SESSION **psess) | |
1888 | { | |
1889 | SSL_SESSION *sess; | |
1890 | unsigned char *sdec; | |
1891 | const unsigned char *p; | |
8a2062fe | 1892 | int slen, mlen, renew_ticket = 0; |
6434abbf DSH |
1893 | unsigned char tick_hmac[EVP_MAX_MD_SIZE]; |
1894 | HMAC_CTX hctx; | |
1895 | EVP_CIPHER_CTX ctx; | |
661dc143 | 1896 | SSL_CTX *tctx = s->initial_ctx; |
8a2062fe DSH |
1897 | /* Need at least keyname + iv + some encrypted data */ |
1898 | if (eticklen < 48) | |
1899 | goto tickerr; | |
1900 | /* Initialize session ticket encryption and HMAC contexts */ | |
1901 | HMAC_CTX_init(&hctx); | |
1902 | EVP_CIPHER_CTX_init(&ctx); | |
661dc143 | 1903 | if (tctx->tlsext_ticket_key_cb) |
8a2062fe DSH |
1904 | { |
1905 | unsigned char *nctick = (unsigned char *)etick; | |
661dc143 | 1906 | int rv = tctx->tlsext_ticket_key_cb(s, nctick, nctick + 16, |
8a2062fe DSH |
1907 | &ctx, &hctx, 0); |
1908 | if (rv < 0) | |
1909 | return -1; | |
1910 | if (rv == 0) | |
1911 | goto tickerr; | |
1912 | if (rv == 2) | |
1913 | renew_ticket = 1; | |
1914 | } | |
1915 | else | |
1916 | { | |
1917 | /* Check key name matches */ | |
661dc143 | 1918 | if (memcmp(etick, tctx->tlsext_tick_key_name, 16)) |
8a2062fe | 1919 | goto tickerr; |
661dc143 | 1920 | HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16, |
8a2062fe DSH |
1921 | tlsext_tick_md(), NULL); |
1922 | EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL, | |
661dc143 | 1923 | tctx->tlsext_tick_aes_key, etick + 16); |
8a2062fe | 1924 | } |
6434abbf DSH |
1925 | /* Attempt to process session ticket, first conduct sanity and |
1926 | * integrity checks on ticket. | |
1927 | */ | |
8a2062fe | 1928 | mlen = HMAC_size(&hctx); |
0eab41fb BL |
1929 | if (mlen < 0) |
1930 | { | |
1931 | EVP_CIPHER_CTX_cleanup(&ctx); | |
1932 | return -1; | |
1933 | } | |
6434abbf | 1934 | eticklen -= mlen; |
6434abbf | 1935 | /* Check HMAC of encrypted ticket */ |
6434abbf DSH |
1936 | HMAC_Update(&hctx, etick, eticklen); |
1937 | HMAC_Final(&hctx, tick_hmac, NULL); | |
1938 | HMAC_CTX_cleanup(&hctx); | |
1939 | if (memcmp(tick_hmac, etick + eticklen, mlen)) | |
1940 | goto tickerr; | |
6434abbf | 1941 | /* Attempt to decrypt session data */ |
6434abbf | 1942 | /* Move p after IV to start of encrypted ticket, update length */ |
8a2062fe DSH |
1943 | p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx); |
1944 | eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx); | |
6434abbf DSH |
1945 | sdec = OPENSSL_malloc(eticklen); |
1946 | if (!sdec) | |
1947 | { | |
1948 | EVP_CIPHER_CTX_cleanup(&ctx); | |
1949 | return -1; | |
1950 | } | |
1951 | EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen); | |
1952 | if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0) | |
1953 | goto tickerr; | |
6434abbf DSH |
1954 | slen += mlen; |
1955 | EVP_CIPHER_CTX_cleanup(&ctx); | |
1956 | p = sdec; | |
1957 | ||
1958 | sess = d2i_SSL_SESSION(NULL, &p, slen); | |
1959 | OPENSSL_free(sdec); | |
1960 | if (sess) | |
1961 | { | |
1962 | /* The session ID if non-empty is used by some clients to | |
1963 | * detect that the ticket has been accepted. So we copy it to | |
1964 | * the session structure. If it is empty set length to zero | |
1965 | * as required by standard. | |
1966 | */ | |
1967 | if (sesslen) | |
1968 | memcpy(sess->session_id, sess_id, sesslen); | |
1969 | sess->session_id_length = sesslen; | |
1970 | *psess = sess; | |
8a2062fe | 1971 | s->tlsext_ticket_expected = renew_ticket; |
6434abbf DSH |
1972 | return 1; |
1973 | } | |
1974 | /* If session decrypt failure indicate a cache miss and set state to | |
1975 | * send a new ticket | |
1976 | */ | |
1977 | tickerr: | |
1978 | s->tlsext_ticket_expected = 1; | |
1979 | return 0; | |
1980 | } | |
6434abbf | 1981 | |
6b7be581 DSH |
1982 | /* Tables to translate from NIDs to TLS v1.2 ids */ |
1983 | ||
1984 | typedef struct | |
1985 | { | |
1986 | int nid; | |
1987 | int id; | |
1988 | } tls12_lookup; | |
1989 | ||
1990 | static tls12_lookup tls12_md[] = { | |
1991 | #ifndef OPENSSL_NO_MD5 | |
1992 | {NID_md5, TLSEXT_hash_md5}, | |
1993 | #endif | |
1994 | #ifndef OPENSSL_NO_SHA | |
1995 | {NID_sha1, TLSEXT_hash_sha1}, | |
1996 | #endif | |
1997 | #ifndef OPENSSL_NO_SHA256 | |
1998 | {NID_sha224, TLSEXT_hash_sha224}, | |
1999 | {NID_sha256, TLSEXT_hash_sha256}, | |
2000 | #endif | |
2001 | #ifndef OPENSSL_NO_SHA512 | |
2002 | {NID_sha384, TLSEXT_hash_sha384}, | |
2003 | {NID_sha512, TLSEXT_hash_sha512} | |
2004 | #endif | |
2005 | }; | |
2006 | ||
2007 | static tls12_lookup tls12_sig[] = { | |
2008 | #ifndef OPENSSL_NO_RSA | |
2009 | {EVP_PKEY_RSA, TLSEXT_signature_rsa}, | |
2010 | #endif | |
2011 | #ifndef OPENSSL_NO_RSA | |
2012 | {EVP_PKEY_DSA, TLSEXT_signature_dsa}, | |
2013 | #endif | |
2014 | #ifndef OPENSSL_NO_ECDSA | |
2015 | {EVP_PKEY_EC, TLSEXT_signature_ecdsa} | |
2016 | #endif | |
2017 | }; | |
2018 | ||
2019 | static int tls12_find_id(int nid, tls12_lookup *table, size_t tlen) | |
2020 | { | |
2021 | size_t i; | |
2022 | for (i = 0; i < tlen; i++) | |
2023 | { | |
2024 | if (table[i].nid == nid) | |
2025 | return table[i].id; | |
2026 | } | |
2027 | return -1; | |
2028 | } | |
2029 | #if 0 | |
2030 | static int tls12_find_nid(int id, tls12_lookup *table, size_t tlen) | |
2031 | { | |
2032 | size_t i; | |
2033 | for (i = 0; i < tlen; i++) | |
2034 | { | |
2035 | if (table[i].id == id) | |
2036 | return table[i].nid; | |
2037 | } | |
2038 | return -1; | |
2039 | } | |
2040 | #endif | |
a2f9200f DSH |
2041 | |
2042 | int tls12_get_sigandhash(unsigned char *p, const EVP_PKEY *pk, const EVP_MD *md) | |
6b7be581 DSH |
2043 | { |
2044 | int sig_id, md_id; | |
2045 | md_id = tls12_find_id(EVP_MD_type(md), tls12_md, | |
2046 | sizeof(tls12_md)/sizeof(tls12_lookup)); | |
2047 | if (md_id == -1) | |
2048 | return 0; | |
a2f9200f | 2049 | sig_id = tls12_get_sigid(pk); |
6b7be581 DSH |
2050 | if (sig_id == -1) |
2051 | return 0; | |
2052 | p[0] = (unsigned char)md_id; | |
2053 | p[1] = (unsigned char)sig_id; | |
2054 | return 1; | |
2055 | } | |
2056 | ||
a2f9200f DSH |
2057 | int tls12_get_sigid(const EVP_PKEY *pk) |
2058 | { | |
2059 | return tls12_find_id(pk->type, tls12_sig, | |
2060 | sizeof(tls12_sig)/sizeof(tls12_lookup)); | |
2061 | } | |
2062 | ||
2063 | const EVP_MD *tls12_get_hash(unsigned char hash_alg) | |
2064 | { | |
2065 | switch(hash_alg) | |
2066 | { | |
2067 | #ifndef OPENSSL_NO_MD5 | |
2068 | case TLSEXT_hash_md5: | |
2069 | return EVP_md5(); | |
2070 | #endif | |
2071 | #ifndef OPENSSL_NO_SHA | |
2072 | case TLSEXT_hash_sha1: | |
2073 | return EVP_sha1(); | |
2074 | #endif | |
2075 | #ifndef OPENSSL_NO_SHA256 | |
2076 | case TLSEXT_hash_sha224: | |
2077 | return EVP_sha224(); | |
2078 | ||
2079 | case TLSEXT_hash_sha256: | |
2080 | return EVP_sha256(); | |
2081 | #endif | |
2082 | #ifndef OPENSSL_NO_SHA512 | |
2083 | case TLSEXT_hash_sha384: | |
2084 | return EVP_sha384(); | |
2085 | ||
2086 | case TLSEXT_hash_sha512: | |
2087 | return EVP_sha512(); | |
2088 | #endif | |
2089 | default: | |
2090 | return NULL; | |
2091 | ||
2092 | } | |
2093 | } | |
2094 | ||
6b7be581 DSH |
2095 | /* Set preferred digest for each key type */ |
2096 | ||
8f829124 | 2097 | int tls1_process_sigalgs(SSL *s, const unsigned char *data, int dsize) |
6b7be581 DSH |
2098 | { |
2099 | int i, idx; | |
2100 | const EVP_MD *md; | |
2101 | CERT *c = s->cert; | |
2102 | /* Extension ignored for TLS versions below 1.2 */ | |
238b6361 | 2103 | if (TLS1_get_version(s) < TLS1_2_VERSION) |
6b7be581 | 2104 | return 1; |
8f829124 DSH |
2105 | /* Should never happen */ |
2106 | if (!c) | |
2107 | return 0; | |
6b7be581 DSH |
2108 | |
2109 | c->pkeys[SSL_PKEY_DSA_SIGN].digest = NULL; | |
2110 | c->pkeys[SSL_PKEY_RSA_SIGN].digest = NULL; | |
2111 | c->pkeys[SSL_PKEY_RSA_ENC].digest = NULL; | |
2112 | c->pkeys[SSL_PKEY_ECC].digest = NULL; | |
2113 | ||
2114 | for (i = 0; i < dsize; i += 2) | |
2115 | { | |
2116 | unsigned char hash_alg = data[i], sig_alg = data[i+1]; | |
2117 | ||
2118 | switch(sig_alg) | |
2119 | { | |
2120 | #ifndef OPENSSL_NO_RSA | |
2121 | case TLSEXT_signature_rsa: | |
2122 | idx = SSL_PKEY_RSA_SIGN; | |
2123 | break; | |
2124 | #endif | |
2125 | #ifndef OPENSSL_NO_DSA | |
2126 | case TLSEXT_signature_dsa: | |
2127 | idx = SSL_PKEY_DSA_SIGN; | |
2128 | break; | |
2129 | #endif | |
2130 | #ifndef OPENSSL_NO_ECDSA | |
2131 | case TLSEXT_signature_ecdsa: | |
2132 | idx = SSL_PKEY_ECC; | |
2133 | break; | |
2134 | #endif | |
2135 | default: | |
2136 | continue; | |
2137 | } | |
2138 | ||
a2f9200f | 2139 | if (c->pkeys[idx].digest == NULL) |
6b7be581 | 2140 | { |
a2f9200f DSH |
2141 | md = tls12_get_hash(hash_alg); |
2142 | if (md) | |
2143 | { | |
2144 | c->pkeys[idx].digest = md; | |
2145 | if (idx == SSL_PKEY_RSA_SIGN) | |
2146 | c->pkeys[SSL_PKEY_RSA_ENC].digest = md; | |
2147 | } | |
6b7be581 DSH |
2148 | } |
2149 | ||
6b7be581 DSH |
2150 | } |
2151 | ||
8f829124 | 2152 | |
6b7be581 DSH |
2153 | /* Set any remaining keys to default values. NOTE: if alg is not |
2154 | * supported it stays as NULL. | |
2155 | */ | |
2156 | #ifndef OPENSSL_NO_DSA | |
2157 | if (!c->pkeys[SSL_PKEY_DSA_SIGN].digest) | |
2158 | c->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_dss1(); | |
2159 | #endif | |
2160 | #ifndef OPENSSL_NO_RSA | |
2161 | if (!c->pkeys[SSL_PKEY_RSA_SIGN].digest) | |
2162 | { | |
2163 | c->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1(); | |
2164 | c->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1(); | |
2165 | } | |
2166 | #endif | |
2167 | #ifndef OPENSSL_NO_ECDSA | |
2168 | if (!c->pkeys[SSL_PKEY_ECC].digest) | |
2169 | c->pkeys[SSL_PKEY_ECC].digest = EVP_ecdsa(); | |
2170 | #endif | |
2171 | return 1; | |
2172 | } | |
2173 | ||
6434abbf | 2174 | #endif |