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8ba708e5 | 1 | /* ssl/statem/statem_clnt.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
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. | |
0f113f3e | 8 | * |
d02b48c6 RE |
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). | |
0f113f3e | 15 | * |
d02b48c6 RE |
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. | |
0f113f3e | 22 | * |
d02b48c6 RE |
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 :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
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. | |
0f113f3e | 52 | * |
d02b48c6 RE |
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 | */ | |
8c74b5e5 | 58 | /* ==================================================================== |
52b8dad8 | 59 | * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. |
8c74b5e5 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 | |
0f113f3e | 66 | * notice, this list of conditions and the following disclaimer. |
8c74b5e5 BM |
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 | */ | |
ea262260 BM |
111 | /* ==================================================================== |
112 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. | |
113 | * | |
0f113f3e | 114 | * Portions of the attached software ("Contribution") are developed by |
ea262260 BM |
115 | * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. |
116 | * | |
117 | * The Contribution is licensed pursuant to the OpenSSL open source | |
118 | * license provided above. | |
119 | * | |
ea262260 BM |
120 | * ECC cipher suite support in OpenSSL originally written by |
121 | * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. | |
122 | * | |
123 | */ | |
ddac1974 NL |
124 | /* ==================================================================== |
125 | * Copyright 2005 Nokia. All rights reserved. | |
126 | * | |
127 | * The portions of the attached software ("Contribution") is developed by | |
128 | * Nokia Corporation and is licensed pursuant to the OpenSSL open source | |
129 | * license. | |
130 | * | |
131 | * The Contribution, originally written by Mika Kousa and Pasi Eronen of | |
132 | * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites | |
133 | * support (see RFC 4279) to OpenSSL. | |
134 | * | |
135 | * No patent licenses or other rights except those expressly stated in | |
136 | * the OpenSSL open source license shall be deemed granted or received | |
137 | * expressly, by implication, estoppel, or otherwise. | |
138 | * | |
139 | * No assurances are provided by Nokia that the Contribution does not | |
140 | * infringe the patent or other intellectual property rights of any third | |
141 | * party or that the license provides you with all the necessary rights | |
142 | * to make use of the Contribution. | |
143 | * | |
144 | * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN | |
145 | * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA | |
146 | * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY | |
147 | * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR | |
148 | * OTHERWISE. | |
149 | */ | |
d02b48c6 RE |
150 | |
151 | #include <stdio.h> | |
8ba708e5 | 152 | #include "../ssl_locl.h" |
61ae935a | 153 | #include "statem_locl.h" |
ec577822 BM |
154 | #include <openssl/buffer.h> |
155 | #include <openssl/rand.h> | |
156 | #include <openssl/objects.h> | |
157 | #include <openssl/evp.h> | |
dbad1690 | 158 | #include <openssl/md5.h> |
3eeaab4b | 159 | #ifndef OPENSSL_NO_DH |
0f113f3e | 160 | # include <openssl/dh.h> |
3eeaab4b | 161 | #endif |
d095b68d | 162 | #include <openssl/bn.h> |
368888bc | 163 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e | 164 | # include <openssl/engine.h> |
368888bc | 165 | #endif |
f9b3bff6 | 166 | |
61ae935a | 167 | static inline int cert_req_allowed(SSL *s); |
a455d0f6 | 168 | static int key_exchange_expected(SSL *s); |
d45ba43d | 169 | static int ssl_set_version(SSL *s); |
0f113f3e | 170 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b); |
d45ba43d | 171 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
e9fa092e | 172 | unsigned char *p); |
ea262260 | 173 | |
61ae935a MC |
174 | |
175 | /* | |
176 | * Is a CertificateRequest message allowed at the moment or not? | |
177 | * | |
178 | * Return values are: | |
179 | * 1: Yes | |
180 | * 0: No | |
181 | */ | |
182 | static inline int cert_req_allowed(SSL *s) | |
183 | { | |
184 | /* TLS does not like anon-DH with client cert */ | |
185 | if (s->version > SSL3_VERSION | |
186 | && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)) | |
187 | return 0; | |
188 | ||
189 | return 1; | |
190 | } | |
191 | ||
192 | /* | |
a455d0f6 | 193 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
194 | * |
195 | * Return values are: | |
196 | * 1: Yes | |
197 | * 0: No | |
a455d0f6 | 198 | * -1: Error |
61ae935a | 199 | */ |
a455d0f6 | 200 | static int key_exchange_expected(SSL *s) |
61ae935a MC |
201 | { |
202 | long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
203 | ||
204 | /* | |
205 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 206 | * ciphersuite or for SRP |
61ae935a | 207 | */ |
a455d0f6 MC |
208 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
209 | | SSL_kSRP)) { | |
210 | return 1; | |
61ae935a MC |
211 | } |
212 | ||
a455d0f6 MC |
213 | /* |
214 | * Export ciphersuites may have temporary RSA keys if the public key in the | |
215 | * server certificate is longer than the maximum export strength | |
216 | */ | |
217 | if ((alg_k & SSL_kRSA) && SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) { | |
218 | EVP_PKEY *pkey; | |
219 | ||
220 | pkey = X509_get_pubkey(s->session->peer); | |
221 | if (pkey == NULL) | |
222 | return -1; | |
223 | ||
224 | /* | |
225 | * If the public key in the certificate is shorter than or equal to the | |
226 | * maximum export strength then a temporary RSA key is not allowed | |
227 | */ | |
228 | if (EVP_PKEY_bits(pkey) | |
229 | <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) | |
230 | return 0; | |
231 | ||
232 | EVP_PKEY_free(pkey); | |
233 | ||
234 | return 1; | |
235 | } | |
236 | ||
237 | return 0; | |
61ae935a MC |
238 | } |
239 | ||
240 | /* | |
241 | * client_read_transition() encapsulates the logic for the allowed handshake | |
242 | * state transitions when the client is reading messages from the server. The | |
243 | * message type that the server has sent is provided in |mt|. The current state | |
244 | * is in |s->statem.hand_state|. | |
245 | * | |
246 | * Return values are: | |
247 | * 1: Success (transition allowed) | |
248 | * 0: Error (transition not allowed) | |
249 | */ | |
250 | int client_read_transition(SSL *s, int mt) | |
251 | { | |
252 | STATEM *st = &s->statem; | |
a455d0f6 | 253 | int ske_expected; |
61ae935a MC |
254 | |
255 | switch(st->hand_state) { | |
256 | case TLS_ST_CW_CLNT_HELLO: | |
257 | if (mt == SSL3_MT_SERVER_HELLO) { | |
258 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
259 | return 1; | |
260 | } | |
261 | ||
262 | if (SSL_IS_DTLS(s)) { | |
263 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
264 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
265 | return 1; | |
266 | } | |
267 | } | |
268 | break; | |
269 | ||
270 | case TLS_ST_CR_SRVR_HELLO: | |
271 | if (s->hit) { | |
272 | if (s->tlsext_ticket_expected) { | |
273 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
274 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
275 | return 1; | |
276 | } | |
277 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
278 | st->hand_state = TLS_ST_CR_CHANGE; | |
279 | return 1; | |
280 | } | |
281 | } else { | |
282 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
283 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
284 | return 1; | |
285 | } else if (!(s->s3->tmp.new_cipher->algorithm_auth | |
286 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { | |
287 | if (mt == SSL3_MT_CERTIFICATE) { | |
288 | st->hand_state = TLS_ST_CR_CERT; | |
289 | return 1; | |
290 | } | |
291 | } else { | |
a455d0f6 MC |
292 | ske_expected = key_exchange_expected(s); |
293 | if (ske_expected < 0) | |
294 | return 0; | |
295 | /* SKE is optional for some PSK ciphersuites */ | |
296 | if (ske_expected | |
297 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) | |
298 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
299 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { | |
300 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
301 | return 1; | |
302 | } | |
303 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
61ae935a MC |
304 | && cert_req_allowed(s)) { |
305 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
306 | return 1; | |
a455d0f6 | 307 | } else if (mt == SSL3_MT_SERVER_DONE) { |
61ae935a MC |
308 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
309 | return 1; | |
61ae935a MC |
310 | } |
311 | } | |
312 | } | |
313 | break; | |
314 | ||
315 | case TLS_ST_CR_CERT: | |
316 | if (s->tlsext_status_expected) { | |
317 | if (mt == SSL3_MT_CERTIFICATE_STATUS) { | |
318 | st->hand_state = TLS_ST_CR_CERT_STATUS; | |
319 | return 1; | |
320 | } | |
a455d0f6 MC |
321 | return 0; |
322 | } | |
323 | /* Fall through */ | |
324 | ||
325 | case TLS_ST_CR_CERT_STATUS: | |
326 | ske_expected = key_exchange_expected(s); | |
327 | if (ske_expected < 0) | |
328 | return 0; | |
329 | /* SKE is optional for some PSK ciphersuites */ | |
330 | if (ske_expected | |
331 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) | |
332 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
61ae935a MC |
333 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
334 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
335 | return 1; | |
61ae935a | 336 | } |
a455d0f6 | 337 | return 0; |
61ae935a | 338 | } |
a455d0f6 | 339 | /* Fall through */ |
61ae935a | 340 | |
a455d0f6 MC |
341 | case TLS_ST_CR_KEY_EXCH: |
342 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
343 | if (cert_req_allowed(s)) { | |
61ae935a MC |
344 | st->hand_state = TLS_ST_CR_CERT_REQ; |
345 | return 1; | |
61ae935a | 346 | } |
a455d0f6 | 347 | return 0; |
61ae935a | 348 | } |
a455d0f6 | 349 | /* Fall through */ |
61ae935a MC |
350 | |
351 | case TLS_ST_CR_CERT_REQ: | |
352 | if (mt == SSL3_MT_SERVER_DONE) { | |
353 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
354 | return 1; | |
355 | } | |
356 | break; | |
357 | ||
358 | case TLS_ST_CW_FINISHED: | |
359 | if (mt == SSL3_MT_NEWSESSION_TICKET && s->tlsext_ticket_expected) { | |
360 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
361 | return 1; | |
362 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
363 | st->hand_state = TLS_ST_CR_CHANGE; | |
364 | return 1; | |
365 | } | |
366 | break; | |
367 | ||
368 | case TLS_ST_CR_SESSION_TICKET: | |
369 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
370 | st->hand_state = TLS_ST_CR_CHANGE; | |
371 | return 1; | |
372 | } | |
373 | break; | |
374 | ||
375 | case TLS_ST_CR_CHANGE: | |
376 | if (mt == SSL3_MT_FINISHED) { | |
377 | st->hand_state = TLS_ST_CR_FINISHED; | |
378 | return 1; | |
379 | } | |
380 | break; | |
381 | ||
382 | default: | |
383 | break; | |
384 | } | |
385 | ||
386 | /* No valid transition found */ | |
387 | return 0; | |
388 | } | |
389 | ||
390 | /* | |
391 | * client_write_transition() works out what handshake state to move to next | |
392 | * when the client is writing messages to be sent to the server. | |
393 | */ | |
394 | enum WRITE_TRAN client_write_transition(SSL *s) | |
395 | { | |
396 | STATEM *st = &s->statem; | |
397 | ||
398 | switch(st->hand_state) { | |
399 | case TLS_ST_OK: | |
400 | /* Renegotiation - fall through */ | |
401 | case TLS_ST_BEFORE: | |
402 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
403 | return WRITE_TRAN_CONTINUE; | |
404 | ||
405 | case TLS_ST_CW_CLNT_HELLO: | |
406 | /* | |
407 | * No transition at the end of writing because we don't know what | |
408 | * we will be sent | |
409 | */ | |
410 | return WRITE_TRAN_FINISHED; | |
411 | ||
412 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: | |
413 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
414 | return WRITE_TRAN_CONTINUE; | |
415 | ||
416 | case TLS_ST_CR_SRVR_DONE: | |
417 | if (s->s3->tmp.cert_req) | |
418 | st->hand_state = TLS_ST_CW_CERT; | |
419 | else | |
420 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
421 | return WRITE_TRAN_CONTINUE; | |
422 | ||
423 | case TLS_ST_CW_CERT: | |
424 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
425 | return WRITE_TRAN_CONTINUE; | |
426 | ||
427 | case TLS_ST_CW_KEY_EXCH: | |
428 | /* | |
429 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
430 | * sent, but no verify packet is sent | |
431 | */ | |
432 | /* | |
433 | * XXX: For now, we do not support client authentication in ECDH | |
434 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
435 | * need to skip the certificate verify message when client's | |
436 | * ECDH public key is sent inside the client certificate. | |
437 | */ | |
438 | if (s->s3->tmp.cert_req == 1) { | |
439 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
440 | } else { | |
441 | st->hand_state = TLS_ST_CW_CHANGE; | |
442 | } | |
443 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
444 | st->hand_state = TLS_ST_CW_CHANGE; | |
445 | } | |
446 | return WRITE_TRAN_CONTINUE; | |
447 | ||
448 | case TLS_ST_CW_CERT_VRFY: | |
449 | st->hand_state = TLS_ST_CW_CHANGE; | |
450 | return WRITE_TRAN_CONTINUE; | |
451 | ||
452 | case TLS_ST_CW_CHANGE: | |
453 | #if defined(OPENSSL_NO_NEXTPROTONEG) | |
454 | st->hand_state = TLS_ST_CW_FINISHED; | |
455 | #else | |
456 | if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen) | |
457 | st->hand_state = TLS_ST_CW_NEXT_PROTO; | |
458 | else | |
459 | st->hand_state = TLS_ST_CW_FINISHED; | |
460 | #endif | |
461 | return WRITE_TRAN_CONTINUE; | |
462 | ||
463 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
464 | case TLS_ST_CW_NEXT_PROTO: | |
465 | st->hand_state = TLS_ST_CW_FINISHED; | |
466 | return WRITE_TRAN_CONTINUE; | |
467 | #endif | |
468 | ||
469 | case TLS_ST_CW_FINISHED: | |
470 | if (s->hit) { | |
471 | st->hand_state = TLS_ST_OK; | |
fe3a3291 | 472 | ossl_statem_set_in_init(s, 0); |
61ae935a MC |
473 | return WRITE_TRAN_CONTINUE; |
474 | } else { | |
475 | return WRITE_TRAN_FINISHED; | |
476 | } | |
477 | ||
478 | case TLS_ST_CR_FINISHED: | |
479 | if (s->hit) { | |
480 | st->hand_state = TLS_ST_CW_CHANGE; | |
481 | return WRITE_TRAN_CONTINUE; | |
482 | } else { | |
483 | st->hand_state = TLS_ST_OK; | |
fe3a3291 | 484 | ossl_statem_set_in_init(s, 0); |
61ae935a MC |
485 | return WRITE_TRAN_CONTINUE; |
486 | } | |
487 | ||
488 | default: | |
489 | /* Shouldn't happen */ | |
490 | return WRITE_TRAN_ERROR; | |
491 | } | |
492 | } | |
493 | ||
494 | /* | |
495 | * Perform any pre work that needs to be done prior to sending a message from | |
496 | * the client to the server. | |
497 | */ | |
498 | enum WORK_STATE client_pre_work(SSL *s, enum WORK_STATE wst) | |
499 | { | |
500 | STATEM *st = &s->statem; | |
501 | ||
502 | switch(st->hand_state) { | |
503 | case TLS_ST_CW_CLNT_HELLO: | |
504 | s->shutdown = 0; | |
505 | if (SSL_IS_DTLS(s)) { | |
506 | /* every DTLS ClientHello resets Finished MAC */ | |
507 | ssl3_init_finished_mac(s); | |
508 | } | |
509 | break; | |
510 | ||
511 | case TLS_ST_CW_CERT: | |
512 | return tls_prepare_client_certificate(s, wst); | |
513 | ||
514 | case TLS_ST_CW_CHANGE: | |
515 | if (SSL_IS_DTLS(s)) { | |
516 | if (s->hit) { | |
517 | /* | |
518 | * We're into the last flight so we don't retransmit these | |
519 | * messages unless we need to. | |
520 | */ | |
521 | st->use_timer = 0; | |
522 | } | |
523 | #ifndef OPENSSL_NO_SCTP | |
524 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
525 | return dtls_wait_for_dry(s); | |
526 | #endif | |
527 | } | |
528 | return WORK_FINISHED_CONTINUE; | |
529 | ||
530 | case TLS_ST_OK: | |
531 | return tls_finish_handshake(s, wst); | |
532 | ||
533 | default: | |
534 | /* No pre work to be done */ | |
535 | break; | |
536 | } | |
537 | ||
538 | return WORK_FINISHED_CONTINUE; | |
539 | } | |
540 | ||
541 | /* | |
542 | * Perform any work that needs to be done after sending a message from the | |
543 | * client to the server. | |
544 | */ | |
545 | enum WORK_STATE client_post_work(SSL *s, enum WORK_STATE wst) | |
546 | { | |
547 | STATEM *st = &s->statem; | |
548 | ||
549 | s->init_num = 0; | |
550 | ||
551 | switch(st->hand_state) { | |
552 | case TLS_ST_CW_CLNT_HELLO: | |
553 | if (SSL_IS_DTLS(s) && s->d1->cookie_len > 0 && statem_flush(s) != 1) | |
554 | return WORK_MORE_A; | |
555 | #ifndef OPENSSL_NO_SCTP | |
556 | /* Disable buffering for SCTP */ | |
557 | if (!SSL_IS_DTLS(s) || !BIO_dgram_is_sctp(SSL_get_wbio(s))) { | |
558 | #endif | |
559 | /* | |
560 | * turn on buffering for the next lot of output | |
561 | */ | |
562 | if (s->bbio != s->wbio) | |
563 | s->wbio = BIO_push(s->bbio, s->wbio); | |
564 | #ifndef OPENSSL_NO_SCTP | |
565 | } | |
566 | #endif | |
567 | if (SSL_IS_DTLS(s)) { | |
568 | /* Treat the next message as the first packet */ | |
569 | s->first_packet = 1; | |
570 | } | |
571 | break; | |
572 | ||
573 | case TLS_ST_CW_KEY_EXCH: | |
574 | if (tls_client_key_exchange_post_work(s) == 0) | |
575 | return WORK_ERROR; | |
576 | break; | |
577 | ||
578 | case TLS_ST_CW_CHANGE: | |
579 | s->session->cipher = s->s3->tmp.new_cipher; | |
580 | #ifdef OPENSSL_NO_COMP | |
581 | s->session->compress_meth = 0; | |
582 | #else | |
583 | if (s->s3->tmp.new_compression == NULL) | |
584 | s->session->compress_meth = 0; | |
585 | else | |
586 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
587 | #endif | |
588 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
589 | return WORK_ERROR; | |
590 | ||
591 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
592 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
593 | return WORK_ERROR; | |
594 | ||
595 | if (SSL_IS_DTLS(s)) { | |
596 | #ifndef OPENSSL_NO_SCTP | |
597 | if (s->hit) { | |
598 | /* | |
599 | * Change to new shared key of SCTP-Auth, will be ignored if | |
600 | * no SCTP used. | |
601 | */ | |
602 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
603 | 0, NULL); | |
604 | } | |
605 | #endif | |
606 | ||
607 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
608 | } | |
609 | break; | |
610 | ||
611 | case TLS_ST_CW_FINISHED: | |
612 | #ifndef OPENSSL_NO_SCTP | |
613 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
614 | /* | |
615 | * Change to new shared key of SCTP-Auth, will be ignored if | |
616 | * no SCTP used. | |
617 | */ | |
618 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
619 | 0, NULL); | |
620 | } | |
621 | #endif | |
622 | if (statem_flush(s) != 1) | |
623 | return WORK_MORE_B; | |
624 | ||
625 | if (s->hit && tls_finish_handshake(s, WORK_MORE_A) != 1) | |
626 | return WORK_ERROR; | |
627 | break; | |
628 | ||
629 | default: | |
630 | /* No post work to be done */ | |
631 | break; | |
632 | } | |
633 | ||
634 | return WORK_FINISHED_CONTINUE; | |
635 | } | |
636 | ||
637 | /* | |
638 | * Construct a message to be sent from the client to the server. | |
639 | * | |
640 | * Valid return values are: | |
641 | * 1: Success | |
642 | * 0: Error | |
643 | */ | |
644 | int client_construct_message(SSL *s) | |
645 | { | |
646 | STATEM *st = &s->statem; | |
647 | ||
648 | switch(st->hand_state) { | |
649 | case TLS_ST_CW_CLNT_HELLO: | |
650 | return tls_construct_client_hello(s); | |
651 | ||
652 | case TLS_ST_CW_CERT: | |
653 | return tls_construct_client_certificate(s); | |
654 | ||
655 | case TLS_ST_CW_KEY_EXCH: | |
656 | return tls_construct_client_key_exchange(s); | |
657 | ||
658 | case TLS_ST_CW_CERT_VRFY: | |
659 | return tls_construct_client_verify(s); | |
660 | ||
661 | case TLS_ST_CW_CHANGE: | |
662 | if (SSL_IS_DTLS(s)) | |
663 | return dtls_construct_change_cipher_spec(s); | |
664 | else | |
665 | return tls_construct_change_cipher_spec(s); | |
666 | ||
667 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
668 | case TLS_ST_CW_NEXT_PROTO: | |
669 | return tls_construct_next_proto(s); | |
670 | #endif | |
671 | case TLS_ST_CW_FINISHED: | |
672 | return tls_construct_finished(s, | |
673 | s->method-> | |
674 | ssl3_enc->client_finished_label, | |
675 | s->method-> | |
676 | ssl3_enc->client_finished_label_len); | |
677 | ||
678 | default: | |
679 | /* Shouldn't happen */ | |
680 | break; | |
681 | } | |
682 | ||
683 | return 0; | |
684 | } | |
685 | ||
686 | /* | |
687 | * Returns the maximum allowed length for the current message that we are | |
688 | * reading. Excludes the message header. | |
689 | */ | |
690 | unsigned long client_max_message_size(SSL *s) | |
691 | { | |
692 | STATEM *st = &s->statem; | |
693 | ||
694 | switch(st->hand_state) { | |
695 | case TLS_ST_CR_SRVR_HELLO: | |
696 | return SERVER_HELLO_MAX_LENGTH; | |
697 | ||
698 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: | |
699 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
700 | ||
701 | case TLS_ST_CR_CERT: | |
702 | return s->max_cert_list; | |
703 | ||
704 | case TLS_ST_CR_CERT_STATUS: | |
705 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
706 | ||
707 | case TLS_ST_CR_KEY_EXCH: | |
708 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
709 | ||
710 | case TLS_ST_CR_CERT_REQ: | |
711 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
712 | ||
713 | case TLS_ST_CR_SRVR_DONE: | |
714 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
715 | ||
716 | case TLS_ST_CR_CHANGE: | |
717 | return CCS_MAX_LENGTH; | |
718 | ||
719 | case TLS_ST_CR_SESSION_TICKET: | |
720 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
721 | ||
722 | case TLS_ST_CR_FINISHED: | |
723 | return FINISHED_MAX_LENGTH; | |
724 | ||
725 | default: | |
726 | /* Shouldn't happen */ | |
727 | break; | |
728 | } | |
729 | ||
730 | return 0; | |
731 | } | |
732 | ||
733 | /* | |
734 | * Process a message that the client has been received from the server. | |
735 | */ | |
736 | enum MSG_PROCESS_RETURN client_process_message(SSL *s, PACKET *pkt) | |
737 | { | |
738 | STATEM *st = &s->statem; | |
739 | ||
740 | switch(st->hand_state) { | |
741 | case TLS_ST_CR_SRVR_HELLO: | |
742 | return tls_process_server_hello(s, pkt); | |
743 | ||
744 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: | |
745 | return dtls_process_hello_verify(s, pkt); | |
746 | ||
747 | case TLS_ST_CR_CERT: | |
748 | return tls_process_server_certificate(s, pkt); | |
749 | ||
750 | case TLS_ST_CR_CERT_STATUS: | |
751 | return tls_process_cert_status(s, pkt); | |
752 | ||
753 | case TLS_ST_CR_KEY_EXCH: | |
754 | return tls_process_key_exchange(s, pkt); | |
755 | ||
756 | case TLS_ST_CR_CERT_REQ: | |
757 | return tls_process_certificate_request(s, pkt); | |
758 | ||
759 | case TLS_ST_CR_SRVR_DONE: | |
760 | return tls_process_server_done(s, pkt); | |
761 | ||
762 | case TLS_ST_CR_CHANGE: | |
763 | return tls_process_change_cipher_spec(s, pkt); | |
764 | ||
765 | case TLS_ST_CR_SESSION_TICKET: | |
766 | return tls_process_new_session_ticket(s, pkt); | |
767 | ||
768 | case TLS_ST_CR_FINISHED: | |
769 | return tls_process_finished(s, pkt); | |
770 | ||
771 | default: | |
772 | /* Shouldn't happen */ | |
773 | break; | |
774 | } | |
775 | ||
776 | return MSG_PROCESS_ERROR; | |
777 | } | |
778 | ||
779 | /* | |
780 | * Perform any further processing required following the receipt of a message | |
781 | * from the server | |
782 | */ | |
783 | enum WORK_STATE client_post_process_message(SSL *s, enum WORK_STATE wst) | |
784 | { | |
785 | STATEM *st = &s->statem; | |
786 | ||
787 | switch(st->hand_state) { | |
788 | #ifndef OPENSSL_NO_SCTP | |
789 | case TLS_ST_CR_SRVR_DONE: | |
790 | /* We only get here if we are using SCTP and we are renegotiating */ | |
791 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) { | |
792 | s->s3->in_read_app_data = 2; | |
793 | s->rwstate = SSL_READING; | |
794 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
795 | BIO_set_retry_read(SSL_get_rbio(s)); | |
fe3a3291 | 796 | ossl_statem_set_sctp_read_sock(s, 1); |
61ae935a MC |
797 | return WORK_MORE_A; |
798 | } | |
fe3a3291 | 799 | ossl_statem_set_sctp_read_sock(s, 0); |
61ae935a MC |
800 | return WORK_FINISHED_STOP; |
801 | #endif | |
802 | ||
803 | case TLS_ST_CR_FINISHED: | |
804 | if (!s->hit) | |
805 | return tls_finish_handshake(s, wst); | |
806 | else | |
807 | return WORK_FINISHED_STOP; | |
808 | default: | |
809 | break; | |
810 | } | |
811 | ||
812 | /* Shouldn't happen */ | |
813 | return WORK_ERROR; | |
814 | } | |
815 | ||
d45ba43d MC |
816 | /* |
817 | * Work out what version we should be using for the initial ClientHello if | |
818 | * the version is currently set to (D)TLS_ANY_VERSION. | |
819 | * Returns 1 on success | |
820 | * Returns 0 on error | |
821 | */ | |
822 | static int ssl_set_version(SSL *s) | |
823 | { | |
824 | unsigned long mask, options = s->options; | |
825 | ||
826 | if (s->method->version == TLS_ANY_VERSION) { | |
827 | /* | |
828 | * SSL_OP_NO_X disables all protocols above X *if* there are | |
829 | * some protocols below X enabled. This is required in order | |
830 | * to maintain "version capability" vector contiguous. So | |
831 | * that if application wants to disable TLS1.0 in favour of | |
832 | * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the | |
833 | * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3. | |
834 | */ | |
835 | mask = SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1 | |
836 | #if !defined(OPENSSL_NO_SSL3) | |
837 | | SSL_OP_NO_SSLv3 | |
838 | #endif | |
839 | ; | |
840 | #if !defined(OPENSSL_NO_TLS1_2_CLIENT) | |
841 | if (options & SSL_OP_NO_TLSv1_2) { | |
842 | if ((options & mask) != mask) { | |
843 | s->version = TLS1_1_VERSION; | |
844 | } else { | |
845 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE); | |
846 | return 0; | |
847 | } | |
848 | } else { | |
849 | s->version = TLS1_2_VERSION; | |
850 | } | |
851 | #else | |
852 | if ((options & mask) == mask) { | |
853 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE); | |
854 | return 0; | |
855 | } | |
856 | s->version = TLS1_1_VERSION; | |
857 | #endif | |
858 | ||
859 | mask &= ~SSL_OP_NO_TLSv1_1; | |
860 | if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask) | |
861 | s->version = TLS1_VERSION; | |
862 | mask &= ~SSL_OP_NO_TLSv1; | |
863 | #if !defined(OPENSSL_NO_SSL3) | |
864 | if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask) | |
865 | s->version = SSL3_VERSION; | |
866 | #endif | |
867 | ||
868 | if (s->version != TLS1_2_VERSION && tls1_suiteb(s)) { | |
869 | SSLerr(SSL_F_SSL_SET_VERSION, | |
870 | SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE); | |
871 | return 0; | |
872 | } | |
873 | ||
874 | if (s->version == SSL3_VERSION && FIPS_mode()) { | |
875 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); | |
876 | return 0; | |
877 | } | |
878 | ||
879 | } else if (s->method->version == DTLS_ANY_VERSION) { | |
880 | /* Determine which DTLS version to use */ | |
881 | /* If DTLS 1.2 disabled correct the version number */ | |
882 | if (options & SSL_OP_NO_DTLSv1_2) { | |
883 | if (tls1_suiteb(s)) { | |
884 | SSLerr(SSL_F_SSL_SET_VERSION, | |
885 | SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE); | |
886 | return 0; | |
887 | } | |
888 | /* | |
889 | * Disabling all versions is silly: return an error. | |
890 | */ | |
891 | if (options & SSL_OP_NO_DTLSv1) { | |
892 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_WRONG_SSL_VERSION); | |
893 | return 0; | |
894 | } | |
895 | /* | |
896 | * Update method so we don't use any DTLS 1.2 features. | |
897 | */ | |
898 | s->method = DTLSv1_client_method(); | |
899 | s->version = DTLS1_VERSION; | |
900 | } else { | |
901 | /* | |
902 | * We only support one version: update method | |
903 | */ | |
904 | if (options & SSL_OP_NO_DTLSv1) | |
905 | s->method = DTLSv1_2_client_method(); | |
906 | s->version = DTLS1_2_VERSION; | |
907 | } | |
908 | } | |
909 | ||
910 | s->client_version = s->version; | |
911 | ||
912 | return 1; | |
913 | } | |
914 | ||
b9908bf9 | 915 | int tls_construct_client_hello(SSL *s) |
0f113f3e MC |
916 | { |
917 | unsigned char *buf; | |
918 | unsigned char *p, *d; | |
919 | int i; | |
920 | unsigned long l; | |
921 | int al = 0; | |
09b6c2ef | 922 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
923 | int j; |
924 | SSL_COMP *comp; | |
925 | #endif | |
b9908bf9 | 926 | SSL_SESSION *sess = s->session; |
0f113f3e MC |
927 | |
928 | buf = (unsigned char *)s->init_buf->data; | |
0f113f3e | 929 | |
b9908bf9 MC |
930 | /* Work out what SSL/TLS/DTLS version to use */ |
931 | if (ssl_set_version(s) == 0) | |
932 | goto err; | |
0f113f3e | 933 | |
b9908bf9 | 934 | if ((sess == NULL) || (sess->ssl_version != s->version) || |
0f113f3e | 935 | /* |
b9908bf9 MC |
936 | * In the case of EAP-FAST, we can have a pre-shared |
937 | * "ticket" without a session ID. | |
0f113f3e | 938 | */ |
b9908bf9 MC |
939 | (!sess->session_id_length && !sess->tlsext_tick) || |
940 | (sess->not_resumable)) { | |
941 | if (!ssl_get_new_session(s, 0)) | |
e1b568dd | 942 | goto err; |
b9908bf9 MC |
943 | } |
944 | /* else use the pre-loaded session */ | |
0f113f3e | 945 | |
b9908bf9 | 946 | p = s->s3->client_random; |
0f113f3e | 947 | |
b9908bf9 MC |
948 | /* |
949 | * for DTLS if client_random is initialized, reuse it, we are | |
950 | * required to use same upon reply to HelloVerify | |
951 | */ | |
952 | if (SSL_IS_DTLS(s)) { | |
953 | size_t idx; | |
954 | i = 1; | |
955 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
956 | if (p[idx]) { | |
957 | i = 0; | |
958 | break; | |
0f113f3e | 959 | } |
0f113f3e | 960 | } |
b9908bf9 MC |
961 | } else |
962 | i = 1; | |
0f113f3e | 963 | |
b9908bf9 MC |
964 | if (i && ssl_fill_hello_random(s, 0, p, |
965 | sizeof(s->s3->client_random)) <= 0) | |
966 | goto err; | |
967 | ||
968 | /* Do the message type and length last */ | |
969 | d = p = ssl_handshake_start(s); | |
970 | ||
971 | /*- | |
972 | * version indicates the negotiated version: for example from | |
973 | * an SSLv2/v3 compatible client hello). The client_version | |
974 | * field is the maximum version we permit and it is also | |
975 | * used in RSA encrypted premaster secrets. Some servers can | |
976 | * choke if we initially report a higher version then | |
977 | * renegotiate to a lower one in the premaster secret. This | |
978 | * didn't happen with TLS 1.0 as most servers supported it | |
979 | * but it can with TLS 1.1 or later if the server only supports | |
980 | * 1.0. | |
981 | * | |
982 | * Possible scenario with previous logic: | |
983 | * 1. Client hello indicates TLS 1.2 | |
984 | * 2. Server hello says TLS 1.0 | |
985 | * 3. RSA encrypted premaster secret uses 1.2. | |
986 | * 4. Handhaked proceeds using TLS 1.0. | |
987 | * 5. Server sends hello request to renegotiate. | |
988 | * 6. Client hello indicates TLS v1.0 as we now | |
989 | * know that is maximum server supports. | |
990 | * 7. Server chokes on RSA encrypted premaster secret | |
991 | * containing version 1.0. | |
992 | * | |
993 | * For interoperability it should be OK to always use the | |
994 | * maximum version we support in client hello and then rely | |
995 | * on the checking of version to ensure the servers isn't | |
996 | * being inconsistent: for example initially negotiating with | |
997 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
998 | * client_version in client hello and not resetting it to | |
999 | * the negotiated version. | |
1000 | */ | |
1001 | *(p++) = s->client_version >> 8; | |
1002 | *(p++) = s->client_version & 0xff; | |
1003 | ||
1004 | /* Random stuff */ | |
1005 | memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); | |
1006 | p += SSL3_RANDOM_SIZE; | |
1007 | ||
1008 | /* Session ID */ | |
1009 | if (s->new_session) | |
1010 | i = 0; | |
1011 | else | |
1012 | i = s->session->session_id_length; | |
1013 | *(p++) = i; | |
1014 | if (i != 0) { | |
1015 | if (i > (int)sizeof(s->session->session_id)) { | |
1016 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
1017 | goto err; | |
0f113f3e | 1018 | } |
b9908bf9 MC |
1019 | memcpy(p, s->session->session_id, i); |
1020 | p += i; | |
1021 | } | |
0f113f3e | 1022 | |
b9908bf9 MC |
1023 | /* cookie stuff for DTLS */ |
1024 | if (SSL_IS_DTLS(s)) { | |
1025 | if (s->d1->cookie_len > sizeof(s->d1->cookie)) { | |
1026 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
1027 | goto err; |
1028 | } | |
b9908bf9 MC |
1029 | *(p++) = s->d1->cookie_len; |
1030 | memcpy(p, s->d1->cookie, s->d1->cookie_len); | |
1031 | p += s->d1->cookie_len; | |
1032 | } | |
1033 | ||
1034 | /* Ciphers supported */ | |
1035 | i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2])); | |
1036 | if (i == 0) { | |
1037 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); | |
1038 | goto err; | |
1039 | } | |
800e1cd9 | 1040 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
b9908bf9 MC |
1041 | /* |
1042 | * Some servers hang if client hello > 256 bytes as hack workaround | |
1043 | * chop number of supported ciphers to keep it well below this if we | |
1044 | * use TLS v1.2 | |
1045 | */ | |
1046 | if (TLS1_get_version(s) >= TLS1_2_VERSION | |
1047 | && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) | |
1048 | i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
0f113f3e | 1049 | #endif |
b9908bf9 MC |
1050 | s2n(i, p); |
1051 | p += i; | |
0f113f3e | 1052 | |
b9908bf9 | 1053 | /* COMPRESSION */ |
09b6c2ef | 1054 | #ifdef OPENSSL_NO_COMP |
b9908bf9 | 1055 | *(p++) = 1; |
09b6c2ef | 1056 | #else |
566dda07 | 1057 | |
b9908bf9 MC |
1058 | if (!ssl_allow_compression(s) || !s->ctx->comp_methods) |
1059 | j = 0; | |
1060 | else | |
1061 | j = sk_SSL_COMP_num(s->ctx->comp_methods); | |
1062 | *(p++) = 1 + j; | |
1063 | for (i = 0; i < j; i++) { | |
1064 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
1065 | *(p++) = comp->id; | |
1066 | } | |
09b6c2ef | 1067 | #endif |
b9908bf9 | 1068 | *(p++) = 0; /* Add the NULL method */ |
761772d7 | 1069 | |
b9908bf9 MC |
1070 | /* TLS extensions */ |
1071 | if (ssl_prepare_clienthello_tlsext(s) <= 0) { | |
1072 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); | |
1073 | goto err; | |
1074 | } | |
1075 | if ((p = | |
1076 | ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH, | |
1077 | &al)) == NULL) { | |
1078 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1079 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
1080 | goto err; | |
1081 | } | |
0f113f3e | 1082 | |
b9908bf9 MC |
1083 | l = p - d; |
1084 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) { | |
1085 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
1086 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
1087 | goto err; | |
0f113f3e MC |
1088 | } |
1089 | ||
b9908bf9 | 1090 | return 1; |
0f113f3e | 1091 | err: |
fe3a3291 | 1092 | ossl_statem_set_error(s); |
b9908bf9 | 1093 | return 0; |
0f113f3e | 1094 | } |
d02b48c6 | 1095 | |
8ba708e5 MC |
1096 | enum MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
1097 | { | |
1098 | int al; | |
1099 | unsigned int cookie_len; | |
1100 | PACKET cookiepkt; | |
1101 | ||
1102 | if (!PACKET_forward(pkt, 2) | |
1103 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { | |
1104 | al = SSL_AD_DECODE_ERROR; | |
1105 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1106 | goto f_err; | |
1107 | } | |
1108 | ||
1109 | cookie_len = PACKET_remaining(&cookiepkt); | |
1110 | if (cookie_len > sizeof(s->d1->cookie)) { | |
1111 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1112 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG); | |
1113 | goto f_err; | |
1114 | } | |
1115 | ||
1116 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
1117 | al = SSL_AD_DECODE_ERROR; | |
1118 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1119 | goto f_err; | |
1120 | } | |
1121 | s->d1->cookie_len = cookie_len; | |
1122 | ||
1123 | return MSG_PROCESS_FINISHED_READING; | |
1124 | f_err: | |
1125 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1126 | ossl_statem_set_error(s); |
8ba708e5 MC |
1127 | return MSG_PROCESS_ERROR; |
1128 | } | |
1129 | ||
73999b62 | 1130 | enum MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1131 | { |
1132 | STACK_OF(SSL_CIPHER) *sk; | |
1133 | const SSL_CIPHER *c; | |
73999b62 | 1134 | PACKET session_id; |
b9908bf9 MC |
1135 | size_t session_id_len; |
1136 | unsigned char *cipherchars; | |
1137 | int i, al = SSL_AD_INTERNAL_ERROR; | |
1138 | unsigned int compression; | |
1139 | #ifndef OPENSSL_NO_COMP | |
1140 | SSL_COMP *comp; | |
1141 | #endif | |
1142 | ||
13c9bb3e | 1143 | if (s->method->version == TLS_ANY_VERSION) { |
50932c4a MC |
1144 | unsigned int sversion; |
1145 | ||
73999b62 | 1146 | if (!PACKET_get_net_2(pkt, &sversion)) { |
50932c4a | 1147 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1148 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1149 | goto f_err; |
1150 | } | |
13c9bb3e MC |
1151 | |
1152 | #if TLS_MAX_VERSION != TLS1_2_VERSION | |
1153 | #error Code needs updating for new TLS version | |
1154 | #endif | |
1155 | #ifndef OPENSSL_NO_SSL3 | |
1156 | if ((sversion == SSL3_VERSION) && !(s->options & SSL_OP_NO_SSLv3)) { | |
1157 | if (FIPS_mode()) { | |
b9908bf9 | 1158 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
13c9bb3e | 1159 | SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); |
d45ba43d MC |
1160 | al = SSL_AD_PROTOCOL_VERSION; |
1161 | goto f_err; | |
13c9bb3e MC |
1162 | } |
1163 | s->method = SSLv3_client_method(); | |
1164 | } else | |
1165 | #endif | |
1166 | if ((sversion == TLS1_VERSION) && !(s->options & SSL_OP_NO_TLSv1)) { | |
1167 | s->method = TLSv1_client_method(); | |
1168 | } else if ((sversion == TLS1_1_VERSION) && | |
1169 | !(s->options & SSL_OP_NO_TLSv1_1)) { | |
1170 | s->method = TLSv1_1_client_method(); | |
1171 | } else if ((sversion == TLS1_2_VERSION) && | |
1172 | !(s->options & SSL_OP_NO_TLSv1_2)) { | |
1173 | s->method = TLSv1_2_client_method(); | |
1174 | } else { | |
b9908bf9 | 1175 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); |
d45ba43d MC |
1176 | al = SSL_AD_PROTOCOL_VERSION; |
1177 | goto f_err; | |
13c9bb3e MC |
1178 | } |
1179 | s->session->ssl_version = s->version = s->method->version; | |
1180 | ||
1181 | if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) { | |
b9908bf9 | 1182 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_VERSION_TOO_LOW); |
d45ba43d MC |
1183 | al = SSL_AD_PROTOCOL_VERSION; |
1184 | goto f_err; | |
13c9bb3e MC |
1185 | } |
1186 | } else if (s->method->version == DTLS_ANY_VERSION) { | |
0f113f3e | 1187 | /* Work out correct protocol version to use */ |
50932c4a MC |
1188 | unsigned int hversion; |
1189 | int options; | |
1190 | ||
73999b62 | 1191 | if (!PACKET_get_net_2(pkt, &hversion)) { |
50932c4a | 1192 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1193 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1194 | goto f_err; |
1195 | } | |
1196 | ||
1197 | options = s->options; | |
0f113f3e MC |
1198 | if (hversion == DTLS1_2_VERSION && !(options & SSL_OP_NO_DTLSv1_2)) |
1199 | s->method = DTLSv1_2_client_method(); | |
1200 | else if (tls1_suiteb(s)) { | |
b9908bf9 | 1201 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1202 | SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE); |
1203 | s->version = hversion; | |
1204 | al = SSL_AD_PROTOCOL_VERSION; | |
1205 | goto f_err; | |
1206 | } else if (hversion == DTLS1_VERSION && !(options & SSL_OP_NO_DTLSv1)) | |
1207 | s->method = DTLSv1_client_method(); | |
1208 | else { | |
b9908bf9 | 1209 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); |
0f113f3e MC |
1210 | s->version = hversion; |
1211 | al = SSL_AD_PROTOCOL_VERSION; | |
1212 | goto f_err; | |
1213 | } | |
7322abf5 | 1214 | s->session->ssl_version = s->version = s->method->version; |
50932c4a MC |
1215 | } else { |
1216 | unsigned char *vers; | |
1217 | ||
73999b62 | 1218 | if (!PACKET_get_bytes(pkt, &vers, 2)) { |
50932c4a | 1219 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1220 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1221 | goto f_err; |
1222 | } | |
1223 | if ((vers[0] != (s->version >> 8)) | |
1224 | || (vers[1] != (s->version & 0xff))) { | |
b9908bf9 | 1225 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); |
50932c4a MC |
1226 | s->version = (s->version & 0xff00) | vers[1]; |
1227 | al = SSL_AD_PROTOCOL_VERSION; | |
1228 | goto f_err; | |
1229 | } | |
0f113f3e | 1230 | } |
0f113f3e MC |
1231 | |
1232 | /* load the server hello data */ | |
1233 | /* load the server random */ | |
73999b62 | 1234 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { |
50932c4a | 1235 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1236 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1237 | goto f_err; |
1238 | } | |
0f113f3e MC |
1239 | |
1240 | s->hit = 0; | |
1241 | ||
fc5ce51d | 1242 | /* Get the session-id. */ |
73999b62 | 1243 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { |
fc5ce51d EK |
1244 | al = SSL_AD_DECODE_ERROR; |
1245 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1246 | goto f_err; | |
1247 | } | |
1248 | session_id_len = PACKET_remaining(&session_id); | |
1249 | if (session_id_len > sizeof s->session->session_id | |
1250 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
0f113f3e | 1251 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1252 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG); |
0f113f3e MC |
1253 | goto f_err; |
1254 | } | |
e481f9b9 | 1255 | |
73999b62 | 1256 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
fc5ce51d EK |
1257 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
1258 | al = SSL_AD_DECODE_ERROR; | |
1259 | goto f_err; | |
1260 | } | |
1261 | ||
0f113f3e | 1262 | /* |
6e3d0153 EK |
1263 | * Check if we can resume the session based on external pre-shared secret. |
1264 | * EAP-FAST (RFC 4851) supports two types of session resumption. | |
1265 | * Resumption based on server-side state works with session IDs. | |
1266 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1267 | * works by overriding the SessionTicket extension at the application | |
1268 | * layer, and does not send a session ID. (We do not know whether EAP-FAST | |
1269 | * servers would honour the session ID.) Therefore, the session ID alone | |
1270 | * is not a reliable indicator of session resumption, so we first check if | |
1271 | * we can resume, and later peek at the next handshake message to see if the | |
1272 | * server wants to resume. | |
0f113f3e | 1273 | */ |
6e3d0153 EK |
1274 | if (s->version >= TLS1_VERSION && s->tls_session_secret_cb && |
1275 | s->session->tlsext_tick) { | |
0f113f3e MC |
1276 | SSL_CIPHER *pref_cipher = NULL; |
1277 | s->session->master_key_length = sizeof(s->session->master_key); | |
1278 | if (s->tls_session_secret_cb(s, s->session->master_key, | |
1279 | &s->session->master_key_length, | |
1280 | NULL, &pref_cipher, | |
1281 | s->tls_session_secret_cb_arg)) { | |
1282 | s->session->cipher = pref_cipher ? | |
50932c4a | 1283 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars); |
6e3d0153 | 1284 | } else { |
b9908bf9 | 1285 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); |
6e3d0153 EK |
1286 | al = SSL_AD_INTERNAL_ERROR; |
1287 | goto f_err; | |
0f113f3e | 1288 | } |
50932c4a MC |
1289 | } |
1290 | ||
fc5ce51d EK |
1291 | if (session_id_len != 0 && session_id_len == s->session->session_id_length |
1292 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1293 | session_id_len) == 0) { | |
0f113f3e MC |
1294 | if (s->sid_ctx_length != s->session->sid_ctx_length |
1295 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { | |
1296 | /* actually a client application bug */ | |
1297 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1298 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1299 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1300 | goto f_err; | |
1301 | } | |
1302 | s->hit = 1; | |
6e3d0153 | 1303 | } else { |
0f113f3e | 1304 | /* |
6e3d0153 EK |
1305 | * If we were trying for session-id reuse but the server |
1306 | * didn't echo the ID, make a new SSL_SESSION. | |
1307 | * In the case of EAP-FAST and PAC, we do not send a session ID, | |
1308 | * so the PAC-based session secret is always preserved. It'll be | |
1309 | * overwritten if the server refuses resumption. | |
0f113f3e MC |
1310 | */ |
1311 | if (s->session->session_id_length > 0) { | |
1312 | if (!ssl_get_new_session(s, 0)) { | |
1313 | goto f_err; | |
1314 | } | |
1315 | } | |
50932c4a | 1316 | |
fc5ce51d EK |
1317 | s->session->session_id_length = session_id_len; |
1318 | /* session_id_len could be 0 */ | |
1319 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1320 | session_id_len); | |
0f113f3e | 1321 | } |
fc5ce51d | 1322 | |
50932c4a | 1323 | c = ssl_get_cipher_by_char(s, cipherchars); |
0f113f3e MC |
1324 | if (c == NULL) { |
1325 | /* unknown cipher */ | |
1326 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1327 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); |
0f113f3e MC |
1328 | goto f_err; |
1329 | } | |
1330 | /* Set version disabled mask now we know version */ | |
1331 | if (!SSL_USE_TLS1_2_CIPHERS(s)) | |
4d69f9e6 | 1332 | s->s3->tmp.mask_ssl = SSL_TLSV1_2; |
0f113f3e | 1333 | else |
4d69f9e6 | 1334 | s->s3->tmp.mask_ssl = 0; |
0f113f3e MC |
1335 | /* |
1336 | * If it is a disabled cipher we didn't send it in client hello, so | |
1337 | * return an error. | |
1338 | */ | |
1339 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
1340 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1341 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1342 | goto f_err; |
1343 | } | |
0f113f3e MC |
1344 | |
1345 | sk = ssl_get_ciphers_by_id(s); | |
1346 | i = sk_SSL_CIPHER_find(sk, c); | |
1347 | if (i < 0) { | |
1348 | /* we did not say we would use this cipher */ | |
1349 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1350 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1351 | goto f_err; |
1352 | } | |
1353 | ||
1354 | /* | |
1355 | * Depending on the session caching (internal/external), the cipher | |
1356 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1357 | * set and use it for comparison. | |
1358 | */ | |
1359 | if (s->session->cipher) | |
1360 | s->session->cipher_id = s->session->cipher->id; | |
1361 | if (s->hit && (s->session->cipher_id != c->id)) { | |
9e9858d1 | 1362 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1363 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
9e9858d1 RS |
1364 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
1365 | goto f_err; | |
0f113f3e MC |
1366 | } |
1367 | s->s3->tmp.new_cipher = c; | |
1368 | /* | |
1369 | * Don't digest cached records if no sigalgs: we may need them for client | |
1370 | * authentication. | |
1371 | */ | |
124037fd | 1372 | if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s, 0)) |
0f113f3e MC |
1373 | goto f_err; |
1374 | /* lets get the compression algorithm */ | |
1375 | /* COMPRESSION */ | |
73999b62 | 1376 | if (!PACKET_get_1(pkt, &compression)) { |
50932c4a MC |
1377 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
1378 | al = SSL_AD_DECODE_ERROR; | |
1379 | goto f_err; | |
1380 | } | |
09b6c2ef | 1381 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1382 | if (compression != 0) { |
0f113f3e | 1383 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1384 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1385 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1386 | goto f_err; | |
1387 | } | |
1388 | /* | |
1389 | * If compression is disabled we'd better not try to resume a session | |
1390 | * using compression. | |
1391 | */ | |
1392 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 1393 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
1394 | goto f_err; |
1395 | } | |
09b6c2ef | 1396 | #else |
fc5ce51d | 1397 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 1398 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1399 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1400 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
1401 | goto f_err; | |
1402 | } | |
fc5ce51d | 1403 | if (compression == 0) |
0f113f3e MC |
1404 | comp = NULL; |
1405 | else if (!ssl_allow_compression(s)) { | |
1406 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1407 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 1408 | goto f_err; |
fc5ce51d EK |
1409 | } else { |
1410 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1411 | } | |
0f113f3e | 1412 | |
fc5ce51d | 1413 | if (compression != 0 && comp == NULL) { |
0f113f3e | 1414 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1415 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1416 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1417 | goto f_err; | |
1418 | } else { | |
1419 | s->s3->tmp.new_compression = comp; | |
1420 | } | |
09b6c2ef | 1421 | #endif |
761772d7 | 1422 | |
0f113f3e | 1423 | /* TLS extensions */ |
73999b62 | 1424 | if (!ssl_parse_serverhello_tlsext(s, pkt)) { |
b9908bf9 | 1425 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT); |
0f113f3e MC |
1426 | goto err; |
1427 | } | |
0f113f3e | 1428 | |
73999b62 | 1429 | if (PACKET_remaining(pkt) != 0) { |
0f113f3e MC |
1430 | /* wrong packet length */ |
1431 | al = SSL_AD_DECODE_ERROR; | |
b9908bf9 | 1432 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH); |
0f113f3e MC |
1433 | goto f_err; |
1434 | } | |
1435 | ||
8723588e MC |
1436 | #ifndef OPENSSL_NO_SCTP |
1437 | if (SSL_IS_DTLS(s) && s->hit) { | |
1438 | unsigned char sctpauthkey[64]; | |
1439 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1440 | ||
1441 | /* | |
1442 | * Add new shared key for SCTP-Auth, will be ignored if | |
1443 | * no SCTP used. | |
1444 | */ | |
1445 | snprintf((char *)labelbuffer, | |
1446 | sizeof(DTLS1_SCTP_AUTH_LABEL), | |
1447 | DTLS1_SCTP_AUTH_LABEL); | |
1448 | ||
1449 | if (SSL_export_keying_material(s, sctpauthkey, | |
1450 | sizeof(sctpauthkey), | |
1451 | labelbuffer, | |
1452 | sizeof(labelbuffer), NULL, 0, | |
1453 | 0) <= 0) | |
1454 | goto err; | |
1455 | ||
1456 | BIO_ctrl(SSL_get_wbio(s), | |
1457 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1458 | sizeof(sctpauthkey), sctpauthkey); | |
1459 | } | |
1460 | #endif | |
1461 | ||
b9908bf9 | 1462 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1463 | f_err: |
1464 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1465 | err: | |
fe3a3291 | 1466 | ossl_statem_set_error(s); |
b9908bf9 | 1467 | return MSG_PROCESS_ERROR; |
0f113f3e | 1468 | } |
d02b48c6 | 1469 | |
73999b62 | 1470 | enum MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1471 | { |
1472 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
1473 | unsigned long cert_list_len, cert_len; | |
1474 | X509 *x = NULL; | |
1475 | unsigned char *certstart, *certbytes; | |
1476 | STACK_OF(X509) *sk = NULL; | |
1477 | EVP_PKEY *pkey = NULL; | |
0f113f3e MC |
1478 | |
1479 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1480 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1481 | goto err; |
0f113f3e MC |
1482 | } |
1483 | ||
73999b62 MC |
1484 | if (!PACKET_get_net_3(pkt, &cert_list_len) |
1485 | || PACKET_remaining(pkt) != cert_list_len) { | |
0f113f3e | 1486 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1487 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1488 | goto f_err; |
1489 | } | |
73999b62 MC |
1490 | while (PACKET_remaining(pkt)) { |
1491 | if (!PACKET_get_net_3(pkt, &cert_len) | |
1492 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { | |
0f113f3e | 1493 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1494 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1495 | SSL_R_CERT_LENGTH_MISMATCH); |
1496 | goto f_err; | |
1497 | } | |
1498 | ||
df758a85 MC |
1499 | certstart = certbytes; |
1500 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1501 | if (x == NULL) { |
1502 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1503 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1504 | goto f_err; |
1505 | } | |
df758a85 | 1506 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1507 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1508 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1509 | SSL_R_CERT_LENGTH_MISMATCH); |
1510 | goto f_err; | |
1511 | } | |
1512 | if (!sk_X509_push(sk, x)) { | |
b9908bf9 | 1513 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1514 | goto err; |
0f113f3e MC |
1515 | } |
1516 | x = NULL; | |
0f113f3e MC |
1517 | } |
1518 | ||
1519 | i = ssl_verify_cert_chain(s, sk); | |
55a9a16f | 1520 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { |
0f113f3e | 1521 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1522 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1523 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1524 | goto f_err; | |
1525 | } | |
1526 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1527 | if (i > 1) { | |
b9908bf9 | 1528 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1529 | al = SSL_AD_HANDSHAKE_FAILURE; |
1530 | goto f_err; | |
1531 | } | |
1532 | ||
c34b0f99 | 1533 | s->session->peer_chain = sk; |
0f113f3e MC |
1534 | /* |
1535 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
1536 | * which we don't include in s3_srvr.c | |
1537 | */ | |
1538 | x = sk_X509_value(sk, 0); | |
1539 | sk = NULL; | |
1540 | /* | |
1541 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1542 | */ | |
1543 | ||
1544 | pkey = X509_get_pubkey(x); | |
1545 | ||
55a9a16f | 1546 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
1547 | x = NULL; |
1548 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1549 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1550 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1551 | goto f_err; | |
1552 | } | |
1553 | ||
1554 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1555 | if (i < 0) { |
0f113f3e MC |
1556 | x = NULL; |
1557 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1558 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1559 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1560 | goto f_err; | |
1561 | } | |
1562 | ||
55a9a16f MC |
1563 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); |
1564 | if (exp_idx >= 0 && i != exp_idx) { | |
1565 | x = NULL; | |
1566 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1567 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
55a9a16f MC |
1568 | SSL_R_WRONG_CERTIFICATE_TYPE); |
1569 | goto f_err; | |
0f113f3e | 1570 | } |
a273c6ee | 1571 | s->session->peer_type = i; |
55a9a16f MC |
1572 | |
1573 | X509_free(s->session->peer); | |
05f0fb9f | 1574 | X509_up_ref(x); |
55a9a16f | 1575 | s->session->peer = x; |
0f113f3e MC |
1576 | s->session->verify_result = s->verify_result; |
1577 | ||
1578 | x = NULL; | |
b9908bf9 | 1579 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1580 | goto done; |
1581 | ||
0f113f3e | 1582 | f_err: |
66696478 | 1583 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1584 | err: |
fe3a3291 | 1585 | ossl_statem_set_error(s); |
66696478 | 1586 | done: |
0f113f3e MC |
1587 | EVP_PKEY_free(pkey); |
1588 | X509_free(x); | |
1589 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1590 | return ret; |
0f113f3e | 1591 | } |
d02b48c6 | 1592 | |
73999b62 | 1593 | enum MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1594 | { |
1595 | #ifndef OPENSSL_NO_RSA | |
1596 | unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2]; | |
1597 | #endif | |
1598 | EVP_MD_CTX md_ctx; | |
1599 | int al, j, verify_ret; | |
1600 | long alg_k, alg_a; | |
1601 | EVP_PKEY *pkey = NULL; | |
1602 | const EVP_MD *md = NULL; | |
1603 | #ifndef OPENSSL_NO_RSA | |
1604 | RSA *rsa = NULL; | |
1605 | #endif | |
1606 | #ifndef OPENSSL_NO_DH | |
1607 | DH *dh = NULL; | |
1608 | #endif | |
1609 | #ifndef OPENSSL_NO_EC | |
1610 | EC_KEY *ecdh = NULL; | |
1611 | BN_CTX *bn_ctx = NULL; | |
1612 | EC_POINT *srvr_ecpoint = NULL; | |
1613 | int curve_nid = 0; | |
1614 | #endif | |
73999b62 | 1615 | PACKET save_param_start, signature; |
b9908bf9 MC |
1616 | |
1617 | EVP_MD_CTX_init(&md_ctx); | |
1618 | ||
1619 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
1620 | ||
73999b62 | 1621 | save_param_start = *pkt; |
8d92c1f8 | 1622 | |
bc36ee62 | 1623 | #ifndef OPENSSL_NO_RSA |
8d92c1f8 DSH |
1624 | RSA_free(s->s3->peer_rsa_tmp); |
1625 | s->s3->peer_rsa_tmp = NULL; | |
d02b48c6 | 1626 | #endif |
bc36ee62 | 1627 | #ifndef OPENSSL_NO_DH |
8d92c1f8 DSH |
1628 | DH_free(s->s3->peer_dh_tmp); |
1629 | s->s3->peer_dh_tmp = NULL; | |
ea262260 | 1630 | #endif |
10bf4fc2 | 1631 | #ifndef OPENSSL_NO_EC |
8d92c1f8 DSH |
1632 | EC_KEY_free(s->s3->peer_ecdh_tmp); |
1633 | s->s3->peer_ecdh_tmp = NULL; | |
d02b48c6 | 1634 | #endif |
8d92c1f8 | 1635 | |
0f113f3e | 1636 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; |
d02b48c6 | 1637 | |
0f113f3e | 1638 | al = SSL_AD_DECODE_ERROR; |
f2be92b9 | 1639 | |
ddac1974 | 1640 | #ifndef OPENSSL_NO_PSK |
7689082b DSH |
1641 | /* PSK ciphersuites are preceded by an identity hint */ |
1642 | if (alg_k & SSL_PSK) { | |
32942870 | 1643 | PACKET psk_identity_hint; |
73999b62 | 1644 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { |
32942870 | 1645 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1646 | goto f_err; |
1647 | } | |
0f113f3e MC |
1648 | |
1649 | /* | |
1650 | * Store PSK identity hint for later use, hint is used in | |
1651 | * ssl3_send_client_key_exchange. Assume that the maximum length of | |
1652 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1653 | * identity. | |
1654 | */ | |
32942870 | 1655 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { |
0f113f3e | 1656 | al = SSL_AD_HANDSHAKE_FAILURE; |
b9908bf9 | 1657 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG); |
0f113f3e MC |
1658 | goto f_err; |
1659 | } | |
8098fc56 | 1660 | |
32942870 EK |
1661 | if (!PACKET_strndup(&psk_identity_hint, |
1662 | &s->session->psk_identity_hint)) { | |
1663 | al = SSL_AD_INTERNAL_ERROR; | |
1664 | goto f_err; | |
0f113f3e | 1665 | } |
7689082b DSH |
1666 | } |
1667 | ||
1668 | /* Nothing else to do for plain PSK or RSAPSK */ | |
1669 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
0f113f3e MC |
1670 | } else |
1671 | #endif /* !OPENSSL_NO_PSK */ | |
edc032b5 | 1672 | #ifndef OPENSSL_NO_SRP |
0f113f3e | 1673 | if (alg_k & SSL_kSRP) { |
32942870 | 1674 | PACKET prime, generator, salt, server_pub; |
73999b62 MC |
1675 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1676 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1677 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1678 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
32942870 | 1679 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1680 | goto f_err; |
1681 | } | |
0f113f3e | 1682 | |
32942870 EK |
1683 | if ((s->srp_ctx.N = |
1684 | BN_bin2bn(PACKET_data(&prime), | |
1685 | PACKET_remaining(&prime), NULL)) == NULL | |
1686 | || (s->srp_ctx.g = | |
1687 | BN_bin2bn(PACKET_data(&generator), | |
1688 | PACKET_remaining(&generator), NULL)) == NULL | |
1689 | || (s->srp_ctx.s = | |
1690 | BN_bin2bn(PACKET_data(&salt), | |
1691 | PACKET_remaining(&salt), NULL)) == NULL | |
1692 | || (s->srp_ctx.B = | |
1693 | BN_bin2bn(PACKET_data(&server_pub), | |
1694 | PACKET_remaining(&server_pub), NULL)) == NULL) { | |
0f113f3e MC |
1695 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1696 | goto err; | |
1697 | } | |
0f113f3e MC |
1698 | |
1699 | if (!srp_verify_server_param(s, &al)) { | |
b9908bf9 | 1700 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS); |
0f113f3e MC |
1701 | goto f_err; |
1702 | } | |
0989790b | 1703 | |
edc032b5 | 1704 | /* We must check if there is a certificate */ |
8df53b7a | 1705 | if (alg_a & (SSL_aRSA|SSL_aDSS)) |
a273c6ee | 1706 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e MC |
1707 | } else |
1708 | #endif /* !OPENSSL_NO_SRP */ | |
edc032b5 | 1709 | #ifndef OPENSSL_NO_RSA |
0f113f3e | 1710 | if (alg_k & SSL_kRSA) { |
32942870 | 1711 | PACKET mod, exp; |
0f113f3e MC |
1712 | /* Temporary RSA keys only allowed in export ciphersuites */ |
1713 | if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) { | |
1714 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 1715 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
0f113f3e MC |
1716 | goto f_err; |
1717 | } | |
0f113f3e | 1718 | |
73999b62 MC |
1719 | if (!PACKET_get_length_prefixed_2(pkt, &mod) |
1720 | || !PACKET_get_length_prefixed_2(pkt, &exp)) { | |
32942870 | 1721 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1722 | goto f_err; |
1723 | } | |
0f113f3e | 1724 | |
32942870 EK |
1725 | if ((rsa = RSA_new()) == NULL) { |
1726 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
0f113f3e MC |
1727 | goto err; |
1728 | } | |
0f113f3e | 1729 | |
32942870 EK |
1730 | if ((rsa->n = BN_bin2bn(PACKET_data(&mod), PACKET_remaining(&mod), |
1731 | rsa->n)) == NULL | |
1732 | || (rsa->e = BN_bin2bn(PACKET_data(&exp), PACKET_remaining(&exp), | |
1733 | rsa->e)) == NULL) { | |
0f113f3e MC |
1734 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1735 | goto err; | |
1736 | } | |
0f113f3e MC |
1737 | |
1738 | /* this should be because we are using an export cipher */ | |
1739 | if (alg_a & SSL_aRSA) | |
a273c6ee | 1740 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e | 1741 | else { |
b9908bf9 | 1742 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
0f113f3e MC |
1743 | goto err; |
1744 | } | |
1dece951 | 1745 | |
8d92c1f8 | 1746 | s->s3->peer_rsa_tmp = rsa; |
0f113f3e MC |
1747 | rsa = NULL; |
1748 | } | |
1749 | #else /* OPENSSL_NO_RSA */ | |
1750 | if (0) ; | |
d02b48c6 | 1751 | #endif |
bc36ee62 | 1752 | #ifndef OPENSSL_NO_DH |
7689082b | 1753 | else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
32942870 | 1754 | PACKET prime, generator, pub_key; |
0f113f3e | 1755 | |
73999b62 MC |
1756 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1757 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1758 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
32942870 | 1759 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1760 | goto f_err; |
1761 | } | |
0f113f3e | 1762 | |
32942870 EK |
1763 | if ((dh = DH_new()) == NULL) { |
1764 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB); | |
0f113f3e MC |
1765 | goto err; |
1766 | } | |
0f113f3e | 1767 | |
32942870 EK |
1768 | if ((dh->p = BN_bin2bn(PACKET_data(&prime), |
1769 | PACKET_remaining(&prime), NULL)) == NULL | |
1770 | || (dh->g = BN_bin2bn(PACKET_data(&generator), | |
1771 | PACKET_remaining(&generator), NULL)) == NULL | |
1772 | || (dh->pub_key = | |
1773 | BN_bin2bn(PACKET_data(&pub_key), | |
1774 | PACKET_remaining(&pub_key), NULL)) == NULL) { | |
0f113f3e MC |
1775 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1776 | goto err; | |
1777 | } | |
0f113f3e | 1778 | |
32942870 EK |
1779 | if (BN_is_zero(dh->p) || BN_is_zero(dh->g) || BN_is_zero(dh->pub_key)) { |
1780 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_VALUE); | |
61e72d76 GL |
1781 | goto f_err; |
1782 | } | |
1783 | ||
0f113f3e MC |
1784 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { |
1785 | al = SSL_AD_HANDSHAKE_FAILURE; | |
b9908bf9 | 1786 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL); |
0f113f3e MC |
1787 | goto f_err; |
1788 | } | |
8df53b7a | 1789 | if (alg_a & (SSL_aRSA|SSL_aDSS)) |
a273c6ee | 1790 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e MC |
1791 | /* else anonymous DH, so no certificate or pkey. */ |
1792 | ||
8d92c1f8 | 1793 | s->s3->peer_dh_tmp = dh; |
0f113f3e | 1794 | dh = NULL; |
0f113f3e MC |
1795 | } |
1796 | #endif /* !OPENSSL_NO_DH */ | |
ea262260 | 1797 | |
10bf4fc2 | 1798 | #ifndef OPENSSL_NO_EC |
7689082b | 1799 | else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
0f113f3e MC |
1800 | EC_GROUP *ngroup; |
1801 | const EC_GROUP *group; | |
32942870 EK |
1802 | PACKET encoded_pt; |
1803 | unsigned char *ecparams; | |
0f113f3e MC |
1804 | |
1805 | if ((ecdh = EC_KEY_new()) == NULL) { | |
b9908bf9 | 1806 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1807 | goto err; |
1808 | } | |
1809 | ||
1810 | /* | |
1811 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
32942870 | 1812 | * public key. For now we only support named (not generic) curves and |
8098fc56 | 1813 | * ECParameters in this case is just three bytes. |
0f113f3e | 1814 | */ |
73999b62 | 1815 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { |
0f113f3e MC |
1816 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
1817 | goto f_err; | |
1818 | } | |
1819 | /* | |
1820 | * Check curve is one of our preferences, if not server has sent an | |
1821 | * invalid curve. ECParameters is 3 bytes. | |
1822 | */ | |
32942870 | 1823 | if (!tls1_check_curve(s, ecparams, 3)) { |
0f113f3e MC |
1824 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_CURVE); |
1825 | goto f_err; | |
1826 | } | |
1827 | ||
32942870 | 1828 | if ((curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2))) == 0) { |
0f113f3e | 1829 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1830 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
0f113f3e MC |
1831 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
1832 | goto f_err; | |
1833 | } | |
1834 | ||
1835 | ngroup = EC_GROUP_new_by_curve_name(curve_nid); | |
1836 | if (ngroup == NULL) { | |
b9908bf9 | 1837 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EC_LIB); |
0f113f3e MC |
1838 | goto err; |
1839 | } | |
1840 | if (EC_KEY_set_group(ecdh, ngroup) == 0) { | |
b9908bf9 | 1841 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EC_LIB); |
0f113f3e MC |
1842 | goto err; |
1843 | } | |
1844 | EC_GROUP_free(ngroup); | |
1845 | ||
1846 | group = EC_KEY_get0_group(ecdh); | |
1847 | ||
1848 | if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && | |
1849 | (EC_GROUP_get_degree(group) > 163)) { | |
1850 | al = SSL_AD_EXPORT_RESTRICTION; | |
b9908bf9 | 1851 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
0f113f3e MC |
1852 | SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); |
1853 | goto f_err; | |
1854 | } | |
1855 | ||
0f113f3e MC |
1856 | /* Next, get the encoded ECPoint */ |
1857 | if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || | |
1858 | ((bn_ctx = BN_CTX_new()) == NULL)) { | |
b9908bf9 | 1859 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1860 | goto err; |
1861 | } | |
1862 | ||
73999b62 | 1863 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { |
32942870 | 1864 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
8098fc56 MC |
1865 | goto f_err; |
1866 | } | |
0f113f3e | 1867 | |
32942870 EK |
1868 | if (EC_POINT_oct2point(group, srvr_ecpoint, PACKET_data(&encoded_pt), |
1869 | PACKET_remaining(&encoded_pt), bn_ctx) == 0) { | |
0f113f3e MC |
1870 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT); |
1871 | goto f_err; | |
1872 | } | |
0f113f3e MC |
1873 | |
1874 | /* | |
1875 | * The ECC/TLS specification does not mention the use of DSA to sign | |
1876 | * ECParameters in the server key exchange message. We do support RSA | |
1877 | * and ECDSA. | |
1878 | */ | |
1879 | if (0) ; | |
1880 | # ifndef OPENSSL_NO_RSA | |
1881 | else if (alg_a & SSL_aRSA) | |
a273c6ee | 1882 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e | 1883 | # endif |
10bf4fc2 | 1884 | # ifndef OPENSSL_NO_EC |
0f113f3e | 1885 | else if (alg_a & SSL_aECDSA) |
a273c6ee | 1886 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e MC |
1887 | # endif |
1888 | /* else anonymous ECDH, so no certificate or pkey. */ | |
1889 | EC_KEY_set_public_key(ecdh, srvr_ecpoint); | |
8d92c1f8 | 1890 | s->s3->peer_ecdh_tmp = ecdh; |
0f113f3e MC |
1891 | ecdh = NULL; |
1892 | BN_CTX_free(bn_ctx); | |
1893 | bn_ctx = NULL; | |
1894 | EC_POINT_free(srvr_ecpoint); | |
1895 | srvr_ecpoint = NULL; | |
1896 | } else if (alg_k) { | |
1897 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 1898 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
0f113f3e MC |
1899 | goto f_err; |
1900 | } | |
10bf4fc2 | 1901 | #endif /* !OPENSSL_NO_EC */ |
0f113f3e | 1902 | |
0f113f3e MC |
1903 | /* if it was signed, check the signature */ |
1904 | if (pkey != NULL) { | |
32942870 EK |
1905 | PACKET params; |
1906 | /* | |
1907 | * |pkt| now points to the beginning of the signature, so the difference | |
1908 | * equals the length of the parameters. | |
1909 | */ | |
1910 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
1911 | PACKET_remaining(&save_param_start) - | |
73999b62 | 1912 | PACKET_remaining(pkt))) { |
32942870 EK |
1913 | al = SSL_AD_INTERNAL_ERROR; |
1914 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
1915 | goto f_err; | |
1916 | } | |
1917 | ||
0f113f3e | 1918 | if (SSL_USE_SIGALGS(s)) { |
32942870 | 1919 | unsigned char *sigalgs; |
0f113f3e | 1920 | int rv; |
73999b62 | 1921 | if (!PACKET_get_bytes(pkt, &sigalgs, 2)) { |
0f113f3e MC |
1922 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
1923 | goto f_err; | |
1924 | } | |
32942870 | 1925 | rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey); |
0f113f3e MC |
1926 | if (rv == -1) |
1927 | goto err; | |
1928 | else if (rv == 0) { | |
1929 | goto f_err; | |
1930 | } | |
a2f9200f | 1931 | #ifdef SSL_DEBUG |
0f113f3e MC |
1932 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
1933 | #endif | |
32942870 | 1934 | } else { |
0f113f3e | 1935 | md = EVP_sha1(); |
32942870 | 1936 | } |
0f113f3e | 1937 | |
73999b62 MC |
1938 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
1939 | || PACKET_remaining(pkt) != 0) { | |
32942870 | 1940 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1941 | goto f_err; |
1942 | } | |
0f113f3e | 1943 | j = EVP_PKEY_size(pkey); |
8098fc56 | 1944 | if (j < 0) { |
b9908bf9 | 1945 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
8098fc56 MC |
1946 | goto f_err; |
1947 | } | |
0f113f3e MC |
1948 | |
1949 | /* | |
8098fc56 | 1950 | * Check signature length |
0f113f3e | 1951 | */ |
32942870 | 1952 | if (PACKET_remaining(&signature) > (size_t)j) { |
0f113f3e | 1953 | /* wrong packet length */ |
b9908bf9 | 1954 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH); |
0f113f3e MC |
1955 | goto f_err; |
1956 | } | |
bc36ee62 | 1957 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
1958 | if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s)) { |
1959 | int num; | |
1960 | unsigned int size; | |
1961 | ||
1962 | j = 0; | |
1963 | q = md_buf; | |
1964 | for (num = 2; num > 0; num--) { | |
1965 | EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); | |
1966 | EVP_DigestInit_ex(&md_ctx, (num == 2) | |
1967 | ? s->ctx->md5 : s->ctx->sha1, NULL); | |
1968 | EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]), | |
1969 | SSL3_RANDOM_SIZE); | |
1970 | EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]), | |
1971 | SSL3_RANDOM_SIZE); | |
32942870 EK |
1972 | EVP_DigestUpdate(&md_ctx, PACKET_data(¶ms), |
1973 | PACKET_remaining(¶ms)); | |
0f113f3e MC |
1974 | EVP_DigestFinal_ex(&md_ctx, q, &size); |
1975 | q += size; | |
1976 | j += size; | |
1977 | } | |
8098fc56 | 1978 | verify_ret = |
32942870 EK |
1979 | RSA_verify(NID_md5_sha1, md_buf, j, PACKET_data(&signature), |
1980 | PACKET_remaining(&signature), pkey->pkey.rsa); | |
8098fc56 | 1981 | if (verify_ret < 0) { |
0f113f3e | 1982 | al = SSL_AD_DECRYPT_ERROR; |
b9908bf9 | 1983 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT); |
0f113f3e MC |
1984 | goto f_err; |
1985 | } | |
8098fc56 | 1986 | if (verify_ret == 0) { |
0f113f3e MC |
1987 | /* bad signature */ |
1988 | al = SSL_AD_DECRYPT_ERROR; | |
b9908bf9 | 1989 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); |
0f113f3e MC |
1990 | goto f_err; |
1991 | } | |
1992 | } else | |
1993 | #endif | |
1994 | { | |
1995 | EVP_VerifyInit_ex(&md_ctx, md, NULL); | |
1996 | EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]), | |
1997 | SSL3_RANDOM_SIZE); | |
1998 | EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]), | |
1999 | SSL3_RANDOM_SIZE); | |
32942870 EK |
2000 | EVP_VerifyUpdate(&md_ctx, PACKET_data(¶ms), |
2001 | PACKET_remaining(¶ms)); | |
2002 | if (EVP_VerifyFinal(&md_ctx, PACKET_data(&signature), | |
2003 | PACKET_remaining(&signature), pkey) <= 0) { | |
0f113f3e MC |
2004 | /* bad signature */ |
2005 | al = SSL_AD_DECRYPT_ERROR; | |
b9908bf9 | 2006 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); |
0f113f3e MC |
2007 | goto f_err; |
2008 | } | |
2009 | } | |
2010 | } else { | |
7689082b DSH |
2011 | /* aNULL, aSRP or PSK do not need public keys */ |
2012 | if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_PSK)) { | |
0f113f3e MC |
2013 | /* Might be wrong key type, check it */ |
2014 | if (ssl3_check_cert_and_algorithm(s)) | |
2015 | /* Otherwise this shouldn't happen */ | |
b9908bf9 | 2016 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
0f113f3e MC |
2017 | goto err; |
2018 | } | |
2019 | /* still data left over */ | |
73999b62 | 2020 | if (PACKET_remaining(pkt) != 0) { |
b9908bf9 | 2021 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
0f113f3e MC |
2022 | goto f_err; |
2023 | } | |
2024 | } | |
2025 | EVP_PKEY_free(pkey); | |
2026 | EVP_MD_CTX_cleanup(&md_ctx); | |
b9908bf9 | 2027 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2028 | f_err: |
2029 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2030 | err: | |
2031 | EVP_PKEY_free(pkey); | |
bc36ee62 | 2032 | #ifndef OPENSSL_NO_RSA |
d6407083 | 2033 | RSA_free(rsa); |
6b521df3 | 2034 | #endif |
bc36ee62 | 2035 | #ifndef OPENSSL_NO_DH |
d6407083 | 2036 | DH_free(dh); |
ea262260 | 2037 | #endif |
10bf4fc2 | 2038 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
2039 | BN_CTX_free(bn_ctx); |
2040 | EC_POINT_free(srvr_ecpoint); | |
8fdc3734 | 2041 | EC_KEY_free(ecdh); |
6b521df3 | 2042 | #endif |
0f113f3e | 2043 | EVP_MD_CTX_cleanup(&md_ctx); |
fe3a3291 | 2044 | ossl_statem_set_error(s); |
b9908bf9 | 2045 | return MSG_PROCESS_ERROR; |
0f113f3e | 2046 | } |
d02b48c6 | 2047 | |
73999b62 | 2048 | enum MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2049 | { |
2050 | int ret = MSG_PROCESS_ERROR; | |
2051 | unsigned int list_len, ctype_num, i, name_len; | |
2052 | X509_NAME *xn = NULL; | |
2053 | unsigned char *data; | |
2054 | unsigned char *namestart, *namebytes; | |
2055 | STACK_OF(X509_NAME) *ca_sk = NULL; | |
0f113f3e MC |
2056 | |
2057 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { | |
b9908bf9 | 2058 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2059 | goto err; |
2060 | } | |
2061 | ||
2062 | /* get the certificate types */ | |
73999b62 MC |
2063 | if (!PACKET_get_1(pkt, &ctype_num) |
2064 | || !PACKET_get_bytes(pkt, &data, ctype_num)) { | |
ac112332 | 2065 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2066 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
ac112332 MC |
2067 | goto err; |
2068 | } | |
b548a1f1 RS |
2069 | OPENSSL_free(s->cert->ctypes); |
2070 | s->cert->ctypes = NULL; | |
0f113f3e MC |
2071 | if (ctype_num > SSL3_CT_NUMBER) { |
2072 | /* If we exceed static buffer copy all to cert structure */ | |
2073 | s->cert->ctypes = OPENSSL_malloc(ctype_num); | |
2074 | if (s->cert->ctypes == NULL) { | |
b9908bf9 | 2075 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2076 | goto err; |
2077 | } | |
ac112332 | 2078 | memcpy(s->cert->ctypes, data, ctype_num); |
0f113f3e MC |
2079 | s->cert->ctype_num = (size_t)ctype_num; |
2080 | ctype_num = SSL3_CT_NUMBER; | |
2081 | } | |
2082 | for (i = 0; i < ctype_num; i++) | |
ac112332 MC |
2083 | s->s3->tmp.ctype[i] = data[i]; |
2084 | ||
0f113f3e | 2085 | if (SSL_USE_SIGALGS(s)) { |
73999b62 MC |
2086 | if (!PACKET_get_net_2(pkt, &list_len) |
2087 | || !PACKET_get_bytes(pkt, &data, list_len)) { | |
0f113f3e | 2088 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2089 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2090 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2091 | goto err; |
2092 | } | |
ac112332 | 2093 | |
0f113f3e MC |
2094 | /* Clear certificate digests and validity flags */ |
2095 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
d376e57d | 2096 | s->s3->tmp.md[i] = NULL; |
6383d316 | 2097 | s->s3->tmp.valid_flags[i] = 0; |
0f113f3e | 2098 | } |
ac112332 | 2099 | if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) { |
0f113f3e | 2100 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2101 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2102 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
2103 | goto err; | |
2104 | } | |
2105 | if (!tls1_process_sigalgs(s)) { | |
2106 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2107 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2108 | goto err; |
2109 | } | |
0f113f3e MC |
2110 | } |
2111 | ||
2112 | /* get the CA RDNs */ | |
73999b62 MC |
2113 | if (!PACKET_get_net_2(pkt, &list_len) |
2114 | || PACKET_remaining(pkt) != list_len) { | |
0f113f3e | 2115 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2116 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2117 | goto err; |
2118 | } | |
2119 | ||
73999b62 MC |
2120 | while (PACKET_remaining(pkt)) { |
2121 | if (!PACKET_get_net_2(pkt, &name_len) | |
2122 | || !PACKET_get_bytes(pkt, &namebytes, name_len)) { | |
0f113f3e | 2123 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2124 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2125 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2126 | goto err; |
2127 | } | |
2128 | ||
ac112332 | 2129 | namestart = namebytes; |
0f113f3e | 2130 | |
ac112332 MC |
2131 | if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes, |
2132 | name_len)) == NULL) { | |
3c33c6f6 | 2133 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2134 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); |
3c33c6f6 | 2135 | goto err; |
0f113f3e MC |
2136 | } |
2137 | ||
ac112332 | 2138 | if (namebytes != (namestart + name_len)) { |
0f113f3e | 2139 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2140 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2141 | SSL_R_CA_DN_LENGTH_MISMATCH); |
2142 | goto err; | |
2143 | } | |
2144 | if (!sk_X509_NAME_push(ca_sk, xn)) { | |
b9908bf9 | 2145 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2146 | goto err; |
2147 | } | |
0f113f3e MC |
2148 | } |
2149 | ||
0f113f3e MC |
2150 | /* we should setup a certificate to return.... */ |
2151 | s->s3->tmp.cert_req = 1; | |
2152 | s->s3->tmp.ctype_num = ctype_num; | |
222561fe | 2153 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
0f113f3e MC |
2154 | s->s3->tmp.ca_names = ca_sk; |
2155 | ca_sk = NULL; | |
2156 | ||
b9908bf9 | 2157 | ret = MSG_PROCESS_CONTINUE_READING; |
cc273a93 | 2158 | goto done; |
0f113f3e | 2159 | err: |
fe3a3291 | 2160 | ossl_statem_set_error(s); |
cc273a93 | 2161 | done: |
222561fe | 2162 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
b9908bf9 | 2163 | return ret; |
0f113f3e MC |
2164 | } |
2165 | ||
2166 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
dfeab068 | 2167 | { |
0f113f3e | 2168 | return (X509_NAME_cmp(*a, *b)); |
dfeab068 | 2169 | } |
dfeab068 | 2170 | |
73999b62 | 2171 | enum MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2172 | { |
2173 | int al; | |
2174 | unsigned int ticklen; | |
2175 | unsigned long ticket_lifetime_hint; | |
b9908bf9 | 2176 | |
73999b62 MC |
2177 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
2178 | || !PACKET_get_net_2(pkt, &ticklen) | |
2179 | || PACKET_remaining(pkt) != ticklen) { | |
e711da71 EK |
2180 | al = SSL_AD_DECODE_ERROR; |
2181 | SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); | |
2182 | goto f_err; | |
2183 | } | |
2184 | ||
2185 | /* Server is allowed to change its mind and send an empty ticket. */ | |
2186 | if (ticklen == 0) | |
2187 | return 1; | |
2188 | ||
98ece4ee MC |
2189 | if (s->session->session_id_length > 0) { |
2190 | int i = s->session_ctx->session_cache_mode; | |
2191 | SSL_SESSION *new_sess; | |
2192 | /* | |
2193 | * We reused an existing session, so we need to replace it with a new | |
2194 | * one | |
2195 | */ | |
2196 | if (i & SSL_SESS_CACHE_CLIENT) { | |
2197 | /* | |
2198 | * Remove the old session from the cache | |
2199 | */ | |
2200 | if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) { | |
2201 | if (s->session_ctx->remove_session_cb != NULL) | |
2202 | s->session_ctx->remove_session_cb(s->session_ctx, | |
2203 | s->session); | |
2204 | } else { | |
2205 | /* We carry on if this fails */ | |
2206 | SSL_CTX_remove_session(s->session_ctx, s->session); | |
2207 | } | |
2208 | } | |
2209 | ||
2210 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
2211 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2212 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
2213 | goto f_err; |
2214 | } | |
2215 | ||
2216 | SSL_SESSION_free(s->session); | |
2217 | s->session = new_sess; | |
2218 | } | |
2219 | ||
b548a1f1 RS |
2220 | OPENSSL_free(s->session->tlsext_tick); |
2221 | s->session->tlsext_ticklen = 0; | |
e711da71 | 2222 | |
0f113f3e MC |
2223 | s->session->tlsext_tick = OPENSSL_malloc(ticklen); |
2224 | if (!s->session->tlsext_tick) { | |
b9908bf9 | 2225 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2226 | goto err; |
2227 | } | |
73999b62 | 2228 | if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) { |
561e12bb | 2229 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2230 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
2231 | goto f_err; |
2232 | } | |
e711da71 EK |
2233 | |
2234 | s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint; | |
0f113f3e MC |
2235 | s->session->tlsext_ticklen = ticklen; |
2236 | /* | |
2237 | * There are two ways to detect a resumed ticket session. One is to set | |
2238 | * an appropriate session ID and then the server must return a match in | |
2239 | * ServerHello. This allows the normal client session ID matching to work | |
2240 | * and we know much earlier that the ticket has been accepted. The | |
2241 | * other way is to set zero length session ID when the ticket is | |
2242 | * presented and rely on the handshake to determine session resumption. | |
2243 | * We choose the former approach because this fits in with assumptions | |
2244 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2245 | * SHA256 is disabled) hash of the ticket. | |
2246 | */ | |
561e12bb | 2247 | EVP_Digest(s->session->tlsext_tick, ticklen, |
0f113f3e | 2248 | s->session->session_id, &s->session->session_id_length, |
0f113f3e | 2249 | EVP_sha256(), NULL); |
b9908bf9 | 2250 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2251 | f_err: |
2252 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2253 | err: | |
fe3a3291 | 2254 | ossl_statem_set_error(s); |
b9908bf9 | 2255 | return MSG_PROCESS_ERROR; |
0f113f3e | 2256 | } |
67c8e7f4 | 2257 | |
73999b62 | 2258 | enum MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2259 | { |
2260 | int al; | |
2261 | unsigned long resplen; | |
2262 | unsigned int type; | |
b9908bf9 | 2263 | |
73999b62 | 2264 | if (!PACKET_get_1(pkt, &type) |
ac63710a | 2265 | || type != TLSEXT_STATUSTYPE_ocsp) { |
0f113f3e | 2266 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2267 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE); |
0f113f3e MC |
2268 | goto f_err; |
2269 | } | |
73999b62 MC |
2270 | if (!PACKET_get_net_3(pkt, &resplen) |
2271 | || PACKET_remaining(pkt) != resplen) { | |
0f113f3e | 2272 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2273 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2274 | goto f_err; |
2275 | } | |
b548a1f1 | 2276 | OPENSSL_free(s->tlsext_ocsp_resp); |
ac63710a | 2277 | s->tlsext_ocsp_resp = OPENSSL_malloc(resplen); |
0f113f3e MC |
2278 | if (!s->tlsext_ocsp_resp) { |
2279 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2280 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2281 | goto f_err; |
2282 | } | |
73999b62 | 2283 | if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) { |
ac63710a | 2284 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2285 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); |
ac63710a MC |
2286 | goto f_err; |
2287 | } | |
0f113f3e MC |
2288 | s->tlsext_ocsp_resplen = resplen; |
2289 | if (s->ctx->tlsext_status_cb) { | |
2290 | int ret; | |
2291 | ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); | |
2292 | if (ret == 0) { | |
2293 | al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; | |
b9908bf9 | 2294 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE); |
0f113f3e MC |
2295 | goto f_err; |
2296 | } | |
2297 | if (ret < 0) { | |
2298 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2299 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2300 | goto f_err; |
2301 | } | |
2302 | } | |
b9908bf9 | 2303 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2304 | f_err: |
2305 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2306 | ossl_statem_set_error(s); |
b9908bf9 | 2307 | return MSG_PROCESS_ERROR; |
0f113f3e | 2308 | } |
d02b48c6 | 2309 | |
73999b62 | 2310 | enum MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) |
b9908bf9 | 2311 | { |
73999b62 | 2312 | if (PACKET_remaining(pkt) > 0) { |
0f113f3e MC |
2313 | /* should contain no data */ |
2314 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
b9908bf9 | 2315 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); |
fe3a3291 | 2316 | ossl_statem_set_error(s); |
b9908bf9 | 2317 | return MSG_PROCESS_ERROR; |
0f113f3e | 2318 | } |
b9908bf9 MC |
2319 | |
2320 | #ifndef OPENSSL_NO_SRP | |
2321 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2322 | if (SRP_Calc_A_param(s) <= 0) { | |
2323 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2324 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 2325 | ossl_statem_set_error(s); |
b9908bf9 MC |
2326 | return MSG_PROCESS_ERROR; |
2327 | } | |
2328 | } | |
2329 | #endif | |
2330 | ||
a455d0f6 MC |
2331 | /* |
2332 | * at this point we check that we have the required stuff from | |
2333 | * the server | |
2334 | */ | |
2335 | if (!ssl3_check_cert_and_algorithm(s)) { | |
2336 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
fe3a3291 | 2337 | ossl_statem_set_error(s); |
a455d0f6 MC |
2338 | return MSG_PROCESS_ERROR; |
2339 | } | |
2340 | ||
473483d4 MC |
2341 | #ifndef OPENSSL_NO_SCTP |
2342 | /* Only applies to renegotiation */ | |
2343 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s)) | |
2344 | && s->renegotiate != 0) | |
2345 | return MSG_PROCESS_CONTINUE_PROCESSING; | |
2346 | else | |
2347 | #endif | |
2348 | return MSG_PROCESS_FINISHED_READING; | |
0f113f3e | 2349 | } |
176f31dd | 2350 | |
b9908bf9 | 2351 | int tls_construct_client_key_exchange(SSL *s) |
0f113f3e MC |
2352 | { |
2353 | unsigned char *p; | |
2354 | int n; | |
7689082b DSH |
2355 | #ifndef OPENSSL_NO_PSK |
2356 | size_t pskhdrlen = 0; | |
2357 | #endif | |
0f113f3e | 2358 | unsigned long alg_k; |
bc36ee62 | 2359 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
2360 | unsigned char *q; |
2361 | EVP_PKEY *pkey = NULL; | |
79df9d62 | 2362 | #endif |
10bf4fc2 | 2363 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
2364 | EC_KEY *clnt_ecdh = NULL; |
2365 | const EC_POINT *srvr_ecpoint = NULL; | |
2366 | EVP_PKEY *srvr_pub_pkey = NULL; | |
2367 | unsigned char *encodedPoint = NULL; | |
2368 | int encoded_pt_len = 0; | |
2369 | BN_CTX *bn_ctx = NULL; | |
ea262260 | 2370 | #endif |
c660ec63 DSH |
2371 | unsigned char *pms = NULL; |
2372 | size_t pmslen = 0; | |
7689082b | 2373 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
d02b48c6 | 2374 | |
b9908bf9 | 2375 | p = ssl_handshake_start(s); |
d02b48c6 | 2376 | |
7689082b DSH |
2377 | |
2378 | #ifndef OPENSSL_NO_PSK | |
b9908bf9 MC |
2379 | if (alg_k & SSL_PSK) { |
2380 | int psk_err = 1; | |
2381 | /* | |
2382 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2383 | * \0-terminated identity. The last byte is for us for simulating | |
2384 | * strnlen. | |
2385 | */ | |
2386 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2387 | size_t identitylen; | |
2388 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2389 | size_t psklen; | |
2390 | ||
2391 | if (s->psk_client_callback == NULL) { | |
2392 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2393 | SSL_R_PSK_NO_CLIENT_CB); | |
2394 | goto err; | |
2395 | } | |
7689082b | 2396 | |
b9908bf9 | 2397 | memset(identity, 0, sizeof(identity)); |
7689082b | 2398 | |
b9908bf9 MC |
2399 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2400 | identity, sizeof(identity) - 1, | |
2401 | psk, sizeof(psk)); | |
7689082b | 2402 | |
b9908bf9 MC |
2403 | if (psklen > PSK_MAX_PSK_LEN) { |
2404 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2405 | ERR_R_INTERNAL_ERROR); | |
2406 | goto psk_err; | |
2407 | } else if (psklen == 0) { | |
2408 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2409 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
2410 | goto psk_err; | |
2411 | } | |
7689082b | 2412 | |
b9908bf9 MC |
2413 | OPENSSL_free(s->s3->tmp.psk); |
2414 | s->s3->tmp.psk = BUF_memdup(psk, psklen); | |
2415 | OPENSSL_cleanse(psk, psklen); | |
7689082b | 2416 | |
b9908bf9 MC |
2417 | if (s->s3->tmp.psk == NULL) { |
2418 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2419 | goto memerr; | |
2420 | } | |
7689082b | 2421 | |
b9908bf9 | 2422 | s->s3->tmp.psklen = psklen; |
7689082b | 2423 | |
b9908bf9 MC |
2424 | identitylen = strlen(identity); |
2425 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
2426 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2427 | ERR_R_INTERNAL_ERROR); | |
2428 | goto psk_err; | |
2429 | } | |
2430 | OPENSSL_free(s->session->psk_identity); | |
2431 | s->session->psk_identity = BUF_strdup(identity); | |
2432 | if (s->session->psk_identity == NULL) { | |
7689082b | 2433 | OPENSSL_cleanse(identity, sizeof(identity)); |
b9908bf9 | 2434 | goto memerr; |
7689082b | 2435 | } |
d02b48c6 | 2436 | |
b9908bf9 MC |
2437 | s2n(identitylen, p); |
2438 | memcpy(p, identity, identitylen); | |
2439 | pskhdrlen = 2 + identitylen; | |
2440 | p += identitylen; | |
2441 | psk_err = 0; | |
2442 | psk_err: | |
2443 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2444 | if (psk_err != 0) { | |
2445 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2446 | goto err; | |
0f113f3e | 2447 | } |
b9908bf9 MC |
2448 | } |
2449 | if (alg_k & SSL_kPSK) { | |
2450 | n = 0; | |
2451 | } else | |
2452 | #endif | |
2453 | ||
2454 | /* Fool emacs indentation */ | |
2455 | if (0) { | |
2456 | } | |
bc36ee62 | 2457 | #ifndef OPENSSL_NO_RSA |
b9908bf9 MC |
2458 | else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
2459 | RSA *rsa; | |
2460 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; | |
2461 | pms = OPENSSL_malloc(pmslen); | |
2462 | if (!pms) | |
2463 | goto memerr; | |
2464 | ||
2465 | if (s->session->peer == NULL) { | |
2466 | /* | |
2467 | * We should always have a server certificate with SSL_kRSA. | |
2468 | */ | |
2469 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2470 | ERR_R_INTERNAL_ERROR); | |
2471 | goto err; | |
2472 | } | |
0f113f3e | 2473 | |
b9908bf9 MC |
2474 | if (s->s3->peer_rsa_tmp != NULL) |
2475 | rsa = s->s3->peer_rsa_tmp; | |
2476 | else { | |
2477 | pkey = X509_get_pubkey(s->session->peer); | |
2478 | if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA) | |
2479 | || (pkey->pkey.rsa == NULL)) { | |
2480 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2481 | ERR_R_INTERNAL_ERROR); | |
0f113f3e | 2482 | EVP_PKEY_free(pkey); |
b9908bf9 | 2483 | goto err; |
0f113f3e | 2484 | } |
b9908bf9 MC |
2485 | rsa = pkey->pkey.rsa; |
2486 | EVP_PKEY_free(pkey); | |
2487 | } | |
0f113f3e | 2488 | |
b9908bf9 MC |
2489 | pms[0] = s->client_version >> 8; |
2490 | pms[1] = s->client_version & 0xff; | |
2491 | if (RAND_bytes(pms + 2, pmslen - 2) <= 0) | |
2492 | goto err; | |
0f113f3e | 2493 | |
b9908bf9 MC |
2494 | q = p; |
2495 | /* Fix buf for TLS and beyond */ | |
2496 | if (s->version > SSL3_VERSION) | |
2497 | p += 2; | |
2498 | n = RSA_public_encrypt(pmslen, pms, p, rsa, RSA_PKCS1_PADDING); | |
0f113f3e | 2499 | # ifdef PKCS1_CHECK |
b9908bf9 MC |
2500 | if (s->options & SSL_OP_PKCS1_CHECK_1) |
2501 | p[1]++; | |
2502 | if (s->options & SSL_OP_PKCS1_CHECK_2) | |
2503 | tmp_buf[0] = 0x70; | |
0f113f3e | 2504 | # endif |
b9908bf9 MC |
2505 | if (n <= 0) { |
2506 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2507 | SSL_R_BAD_RSA_ENCRYPT); | |
2508 | goto err; | |
2509 | } | |
0f113f3e | 2510 | |
b9908bf9 MC |
2511 | /* Fix buf for TLS and beyond */ |
2512 | if (s->version > SSL3_VERSION) { | |
2513 | s2n(n, q); | |
2514 | n += 2; | |
0f113f3e | 2515 | } |
b9908bf9 | 2516 | } |
f9b3bff6 | 2517 | #endif |
bc36ee62 | 2518 | #ifndef OPENSSL_NO_DH |
b9908bf9 MC |
2519 | else if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd | SSL_kDHEPSK)) { |
2520 | DH *dh_srvr, *dh_clnt; | |
2521 | if (s->s3->peer_dh_tmp != NULL) | |
2522 | dh_srvr = s->s3->peer_dh_tmp; | |
2523 | else { | |
2524 | /* we get them from the cert */ | |
2525 | EVP_PKEY *spkey = NULL; | |
2526 | dh_srvr = NULL; | |
2527 | spkey = X509_get_pubkey(s->session->peer); | |
2528 | if (spkey) { | |
2529 | dh_srvr = EVP_PKEY_get1_DH(spkey); | |
2530 | EVP_PKEY_free(spkey); | |
0f113f3e | 2531 | } |
b9908bf9 MC |
2532 | if (dh_srvr == NULL) { |
2533 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2534 | ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
2535 | goto err; |
2536 | } | |
0f113f3e | 2537 | } |
b9908bf9 MC |
2538 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { |
2539 | /* Use client certificate key */ | |
2540 | EVP_PKEY *clkey = s->cert->key->privatekey; | |
2541 | dh_clnt = NULL; | |
2542 | if (clkey) | |
2543 | dh_clnt = EVP_PKEY_get1_DH(clkey); | |
2544 | if (dh_clnt == NULL) { | |
2545 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
0f113f3e MC |
2546 | ERR_R_INTERNAL_ERROR); |
2547 | goto err; | |
2548 | } | |
b9908bf9 MC |
2549 | } else { |
2550 | /* generate a new random key */ | |
2551 | if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) { | |
2552 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); | |
0f113f3e MC |
2553 | goto err; |
2554 | } | |
b9908bf9 MC |
2555 | if (!DH_generate_key(dh_clnt)) { |
2556 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); | |
2557 | DH_free(dh_clnt); | |
0f113f3e MC |
2558 | goto err; |
2559 | } | |
b9908bf9 | 2560 | } |
0f113f3e | 2561 | |
b9908bf9 MC |
2562 | pmslen = DH_size(dh_clnt); |
2563 | pms = OPENSSL_malloc(pmslen); | |
2564 | if (!pms) | |
2565 | goto memerr; | |
0f113f3e | 2566 | |
b9908bf9 MC |
2567 | /* |
2568 | * use the 'p' output buffer for the DH key, but make sure to | |
2569 | * clear it out afterwards | |
2570 | */ | |
0f113f3e | 2571 | |
b9908bf9 MC |
2572 | n = DH_compute_key(pms, dh_srvr->pub_key, dh_clnt); |
2573 | if (s->s3->peer_dh_tmp == NULL) | |
2574 | DH_free(dh_srvr); | |
0f113f3e | 2575 | |
b9908bf9 MC |
2576 | if (n <= 0) { |
2577 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); | |
2578 | DH_free(dh_clnt); | |
2579 | goto err; | |
2580 | } | |
2581 | pmslen = n; | |
0f113f3e | 2582 | |
b9908bf9 MC |
2583 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) |
2584 | n = 0; | |
2585 | else { | |
2586 | /* send off the data */ | |
2587 | n = BN_num_bytes(dh_clnt->pub_key); | |
2588 | s2n(n, p); | |
2589 | BN_bn2bin(dh_clnt->pub_key, p); | |
2590 | n += 2; | |
0f113f3e | 2591 | } |
c660ec63 | 2592 | |
b9908bf9 MC |
2593 | DH_free(dh_clnt); |
2594 | } | |
2595 | #endif | |
0f113f3e | 2596 | |
b9908bf9 MC |
2597 | #ifndef OPENSSL_NO_EC |
2598 | else if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe | SSL_kECDHEPSK)) { | |
2599 | const EC_GROUP *srvr_group = NULL; | |
2600 | EC_KEY *tkey; | |
2601 | int ecdh_clnt_cert = 0; | |
2602 | int field_size = 0; | |
2603 | /* | |
2604 | * Did we send out the client's ECDH share for use in premaster | |
2605 | * computation as part of client certificate? If so, set | |
2606 | * ecdh_clnt_cert to 1. | |
2607 | */ | |
2608 | if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) { | |
2609 | /*- | |
2610 | * XXX: For now, we do not support client | |
2611 | * authentication using ECDH certificates. | |
2612 | * To add such support, one needs to add | |
2613 | * code that checks for appropriate | |
2614 | * conditions and sets ecdh_clnt_cert to 1. | |
2615 | * For example, the cert have an ECC | |
2616 | * key on the same curve as the server's | |
2617 | * and the key should be authorized for | |
2618 | * key agreement. | |
0f113f3e | 2619 | * |
b9908bf9 MC |
2620 | * One also needs to add code in ssl3_connect |
2621 | * to skip sending the certificate verify | |
2622 | * message. | |
2623 | * | |
2624 | * if ((s->cert->key->privatekey != NULL) && | |
2625 | * (s->cert->key->privatekey->type == | |
2626 | * EVP_PKEY_EC) && ...) | |
2627 | * ecdh_clnt_cert = 1; | |
0f113f3e | 2628 | */ |
b9908bf9 | 2629 | } |
0f113f3e | 2630 | |
b9908bf9 MC |
2631 | if (s->s3->peer_ecdh_tmp != NULL) { |
2632 | tkey = s->s3->peer_ecdh_tmp; | |
2633 | } else { | |
2634 | /* Get the Server Public Key from Cert */ | |
2635 | srvr_pub_pkey = X509_get_pubkey(s->session->peer); | |
2636 | if ((srvr_pub_pkey == NULL) | |
2637 | || (srvr_pub_pkey->type != EVP_PKEY_EC) | |
2638 | || (srvr_pub_pkey->pkey.ec == NULL)) { | |
2639 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
266483d2 MC |
2640 | ERR_R_INTERNAL_ERROR); |
2641 | goto err; | |
0f113f3e | 2642 | } |
b9908bf9 MC |
2643 | |
2644 | tkey = srvr_pub_pkey->pkey.ec; | |
2645 | } | |
2646 | ||
2647 | srvr_group = EC_KEY_get0_group(tkey); | |
2648 | srvr_ecpoint = EC_KEY_get0_public_key(tkey); | |
2649 | ||
2650 | if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) { | |
2651 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2652 | ERR_R_INTERNAL_ERROR); | |
2653 | goto err; | |
2654 | } | |
2655 | ||
2656 | if ((clnt_ecdh = EC_KEY_new()) == NULL) { | |
2657 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2658 | ERR_R_MALLOC_FAILURE); | |
2659 | goto err; | |
2660 | } | |
2661 | ||
2662 | if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) { | |
2663 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); | |
2664 | goto err; | |
2665 | } | |
2666 | if (ecdh_clnt_cert) { | |
0f113f3e | 2667 | /* |
b9908bf9 MC |
2668 | * Reuse key info from our certificate We only need our |
2669 | * private key to perform the ECDH computation. | |
0f113f3e | 2670 | */ |
b9908bf9 MC |
2671 | const BIGNUM *priv_key; |
2672 | tkey = s->cert->key->privatekey->pkey.ec; | |
2673 | priv_key = EC_KEY_get0_private_key(tkey); | |
2674 | if (priv_key == NULL) { | |
2675 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2676 | ERR_R_MALLOC_FAILURE); | |
0f113f3e MC |
2677 | goto err; |
2678 | } | |
b9908bf9 MC |
2679 | if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) { |
2680 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); | |
0f113f3e MC |
2681 | goto err; |
2682 | } | |
b9908bf9 MC |
2683 | } else { |
2684 | /* Generate a new ECDH key pair */ | |
2685 | if (!(EC_KEY_generate_key(clnt_ecdh))) { | |
2686 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2687 | ERR_R_ECDH_LIB); | |
2688 | goto err; | |
0f113f3e | 2689 | } |
b9908bf9 MC |
2690 | } |
2691 | ||
2692 | /* | |
2693 | * use the 'p' output buffer for the ECDH key, but make sure to | |
2694 | * clear it out afterwards | |
2695 | */ | |
0f113f3e | 2696 | |
b9908bf9 MC |
2697 | field_size = EC_GROUP_get_degree(srvr_group); |
2698 | if (field_size <= 0) { | |
2699 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); | |
2700 | goto err; | |
0f113f3e | 2701 | } |
b9908bf9 MC |
2702 | pmslen = (field_size + 7) / 8; |
2703 | pms = OPENSSL_malloc(pmslen); | |
2704 | if (!pms) | |
2705 | goto memerr; | |
2706 | n = ECDH_compute_key(pms, pmslen, srvr_ecpoint, clnt_ecdh, NULL); | |
2707 | if (n <= 0 || pmslen != (size_t)n) { | |
2708 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); | |
2709 | goto err; | |
2710 | } | |
2711 | ||
2712 | if (ecdh_clnt_cert) { | |
2713 | /* Send empty client key exch message */ | |
2714 | n = 0; | |
2715 | } else { | |
2716 | /* | |
2717 | * First check the size of encoding and allocate memory | |
2718 | * accordingly. | |
2719 | */ | |
2720 | encoded_pt_len = | |
2721 | EC_POINT_point2oct(srvr_group, | |
2722 | EC_KEY_get0_public_key(clnt_ecdh), | |
2723 | POINT_CONVERSION_UNCOMPRESSED, | |
2724 | NULL, 0, NULL); | |
2725 | ||
2726 | encodedPoint = (unsigned char *) | |
2727 | OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char)); | |
2728 | bn_ctx = BN_CTX_new(); | |
2729 | if ((encodedPoint == NULL) || (bn_ctx == NULL)) { | |
2730 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
0f113f3e MC |
2731 | ERR_R_MALLOC_FAILURE); |
2732 | goto err; | |
2733 | } | |
b9908bf9 MC |
2734 | |
2735 | /* Encode the public key */ | |
2736 | n = EC_POINT_point2oct(srvr_group, | |
2737 | EC_KEY_get0_public_key(clnt_ecdh), | |
2738 | POINT_CONVERSION_UNCOMPRESSED, | |
2739 | encodedPoint, encoded_pt_len, bn_ctx); | |
2740 | ||
2741 | *p = n; /* length of encoded point */ | |
2742 | /* Encoded point will be copied here */ | |
2743 | p += 1; | |
2744 | /* copy the point */ | |
2745 | memcpy(p, encodedPoint, n); | |
2746 | /* increment n to account for length field */ | |
2747 | n += 1; | |
0f113f3e MC |
2748 | } |
2749 | ||
b9908bf9 MC |
2750 | /* Free allocated memory */ |
2751 | BN_CTX_free(bn_ctx); | |
2752 | OPENSSL_free(encodedPoint); | |
2753 | EC_KEY_free(clnt_ecdh); | |
2754 | EVP_PKEY_free(srvr_pub_pkey); | |
2755 | } | |
2756 | #endif /* !OPENSSL_NO_EC */ | |
2757 | else if (alg_k & SSL_kGOST) { | |
2758 | /* GOST key exchange message creation */ | |
2759 | EVP_PKEY_CTX *pkey_ctx; | |
2760 | X509 *peer_cert; | |
2761 | size_t msglen; | |
2762 | unsigned int md_len; | |
2763 | unsigned char shared_ukm[32], tmp[256]; | |
2764 | EVP_MD_CTX *ukm_hash; | |
2765 | EVP_PKEY *pub_key; | |
2766 | ||
2767 | pmslen = 32; | |
2768 | pms = OPENSSL_malloc(pmslen); | |
2769 | if (!pms) | |
2770 | goto memerr; | |
7689082b | 2771 | |
b9908bf9 MC |
2772 | /* |
2773 | * Get server sertificate PKEY and create ctx from it | |
2774 | */ | |
2775 | peer_cert = s->session->peer; | |
2776 | if (!peer_cert) { | |
2777 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2778 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); | |
77d514c5 MC |
2779 | goto err; |
2780 | } | |
2781 | ||
b9908bf9 MC |
2782 | pkey_ctx = EVP_PKEY_CTX_new(pub_key = |
2783 | X509_get_pubkey(peer_cert), NULL); | |
2784 | /* | |
2785 | * If we have send a certificate, and certificate key | |
2786 | * | |
2787 | * * parameters match those of server certificate, use | |
2788 | * certificate key for key exchange | |
2789 | */ | |
0f113f3e | 2790 | |
b9908bf9 MC |
2791 | /* Otherwise, generate ephemeral key pair */ |
2792 | ||
2793 | EVP_PKEY_encrypt_init(pkey_ctx); | |
2794 | /* Generate session key */ | |
2795 | if (RAND_bytes(pms, pmslen) <= 0) { | |
2796 | EVP_PKEY_CTX_free(pkey_ctx); | |
2797 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2798 | ERR_R_INTERNAL_ERROR); | |
2799 | goto err; | |
2800 | }; | |
c660ec63 | 2801 | /* |
b9908bf9 | 2802 | * If we have client certificate, use its secret as peer key |
c660ec63 | 2803 | */ |
b9908bf9 MC |
2804 | if (s->s3->tmp.cert_req && s->cert->key->privatekey) { |
2805 | if (EVP_PKEY_derive_set_peer | |
2806 | (pkey_ctx, s->cert->key->privatekey) <= 0) { | |
2807 | /* | |
2808 | * If there was an error - just ignore it. Ephemeral key | |
2809 | * * would be used | |
2810 | */ | |
2811 | ERR_clear_error(); | |
c660ec63 DSH |
2812 | } |
2813 | } | |
b9908bf9 MC |
2814 | /* |
2815 | * Compute shared IV and store it in algorithm-specific context | |
2816 | * data | |
2817 | */ | |
2818 | ukm_hash = EVP_MD_CTX_create(); | |
2819 | EVP_DigestInit(ukm_hash, | |
2820 | EVP_get_digestbynid(NID_id_GostR3411_94)); | |
2821 | EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
2822 | SSL3_RANDOM_SIZE); | |
2823 | EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2824 | SSL3_RANDOM_SIZE); | |
2825 | EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); | |
2826 | EVP_MD_CTX_destroy(ukm_hash); | |
2827 | if (EVP_PKEY_CTX_ctrl | |
2828 | (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8, | |
2829 | shared_ukm) < 0) { | |
2830 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2831 | SSL_R_LIBRARY_BUG); | |
2832 | goto err; | |
c660ec63 | 2833 | } |
b9908bf9 MC |
2834 | /* Make GOST keytransport blob message */ |
2835 | /* | |
2836 | * Encapsulate it into sequence | |
2837 | */ | |
2838 | *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; | |
2839 | msglen = 255; | |
2840 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) < 0) { | |
2841 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2842 | SSL_R_LIBRARY_BUG); | |
c660ec63 DSH |
2843 | goto err; |
2844 | } | |
b9908bf9 MC |
2845 | if (msglen >= 0x80) { |
2846 | *(p++) = 0x81; | |
2847 | *(p++) = msglen & 0xff; | |
2848 | n = msglen + 3; | |
2849 | } else { | |
2850 | *(p++) = msglen & 0xff; | |
2851 | n = msglen + 2; | |
2852 | } | |
2853 | memcpy(p, tmp, msglen); | |
2854 | /* Check if pubkey from client certificate was used */ | |
2855 | if (EVP_PKEY_CTX_ctrl | |
2856 | (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) { | |
2857 | /* Set flag "skip certificate verify" */ | |
2858 | s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; | |
2859 | } | |
2860 | EVP_PKEY_CTX_free(pkey_ctx); | |
2861 | EVP_PKEY_free(pub_key); | |
2862 | ||
2863 | } | |
2864 | #ifndef OPENSSL_NO_SRP | |
2865 | else if (alg_k & SSL_kSRP) { | |
2866 | if (s->srp_ctx.A != NULL) { | |
2867 | /* send off the data */ | |
2868 | n = BN_num_bytes(s->srp_ctx.A); | |
2869 | s2n(n, p); | |
2870 | BN_bn2bin(s->srp_ctx.A, p); | |
2871 | n += 2; | |
2872 | } else { | |
2873 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2874 | ERR_R_INTERNAL_ERROR); | |
2875 | goto err; | |
2876 | } | |
2877 | OPENSSL_free(s->session->srp_username); | |
2878 | s->session->srp_username = BUF_strdup(s->srp_ctx.login); | |
2879 | if (s->session->srp_username == NULL) { | |
2880 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2881 | ERR_R_MALLOC_FAILURE); | |
69f68237 MC |
2882 | goto err; |
2883 | } | |
c660ec63 | 2884 | } |
b9908bf9 MC |
2885 | #endif |
2886 | else { | |
2887 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2888 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2889 | goto err; | |
2890 | } | |
2891 | ||
2892 | #ifndef OPENSSL_NO_PSK | |
2893 | n += pskhdrlen; | |
2894 | #endif | |
2895 | ||
2896 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) { | |
2897 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2898 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2899 | goto err; | |
2900 | } | |
2901 | ||
2902 | s->s3->tmp.pms = pms; | |
2903 | s->s3->tmp.pmslen = pmslen; | |
2904 | ||
2905 | return 1; | |
c660ec63 DSH |
2906 | memerr: |
2907 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2908 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); |
0f113f3e | 2909 | err: |
4b45c6e5 | 2910 | OPENSSL_clear_free(pms, pmslen); |
76106e60 | 2911 | s->s3->tmp.pms = NULL; |
10bf4fc2 | 2912 | #ifndef OPENSSL_NO_EC |
0f113f3e | 2913 | BN_CTX_free(bn_ctx); |
b548a1f1 | 2914 | OPENSSL_free(encodedPoint); |
8fdc3734 | 2915 | EC_KEY_free(clnt_ecdh); |
0f113f3e | 2916 | EVP_PKEY_free(srvr_pub_pkey); |
7689082b DSH |
2917 | #endif |
2918 | #ifndef OPENSSL_NO_PSK | |
2919 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
2920 | s->s3->tmp.psk = NULL; | |
0f113f3e | 2921 | #endif |
fe3a3291 | 2922 | ossl_statem_set_error(s); |
b9908bf9 MC |
2923 | return 0; |
2924 | } | |
2925 | ||
2926 | int tls_client_key_exchange_post_work(SSL *s) | |
2927 | { | |
2928 | unsigned char *pms = NULL; | |
2929 | size_t pmslen = 0; | |
2930 | ||
2931 | #ifndef OPENSSL_NO_SRP | |
2932 | /* Check for SRP */ | |
2933 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2934 | if (!srp_generate_client_master_secret(s)) { | |
2935 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
2936 | ERR_R_INTERNAL_ERROR); | |
2937 | goto err; | |
2938 | } | |
2939 | return 1; | |
2940 | } | |
2941 | #endif | |
2942 | pms = s->s3->tmp.pms; | |
2943 | pmslen = s->s3->tmp.pmslen; | |
2944 | ||
2945 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
2946 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2947 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
2948 | goto err; | |
2949 | } | |
2950 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
2951 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2952 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
2953 | goto err; | |
2954 | } | |
473483d4 MC |
2955 | |
2956 | #ifndef OPENSSL_NO_SCTP | |
2957 | if (SSL_IS_DTLS(s)) { | |
2958 | unsigned char sctpauthkey[64]; | |
2959 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
2960 | ||
2961 | /* | |
2962 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
2963 | * used. | |
2964 | */ | |
2965 | snprintf((char *)labelbuffer, sizeof(DTLS1_SCTP_AUTH_LABEL), | |
2966 | DTLS1_SCTP_AUTH_LABEL); | |
2967 | ||
2968 | if (SSL_export_keying_material(s, sctpauthkey, | |
2969 | sizeof(sctpauthkey), labelbuffer, | |
2970 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
2971 | goto err; | |
2972 | ||
2973 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
2974 | sizeof(sctpauthkey), sctpauthkey); | |
2975 | } | |
2976 | #endif | |
2977 | ||
b9908bf9 MC |
2978 | return 1; |
2979 | err: | |
2980 | OPENSSL_clear_free(pms, pmslen); | |
2981 | s->s3->tmp.pms = NULL; | |
2982 | return 0; | |
0f113f3e | 2983 | } |
d02b48c6 | 2984 | |
b9908bf9 | 2985 | int tls_construct_client_verify(SSL *s) |
0f113f3e MC |
2986 | { |
2987 | unsigned char *p; | |
2988 | unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH]; | |
2989 | EVP_PKEY *pkey; | |
2990 | EVP_PKEY_CTX *pctx = NULL; | |
2991 | EVP_MD_CTX mctx; | |
2992 | unsigned u = 0; | |
2993 | unsigned long n; | |
2994 | int j; | |
2995 | ||
2996 | EVP_MD_CTX_init(&mctx); | |
2997 | ||
b9908bf9 MC |
2998 | p = ssl_handshake_start(s); |
2999 | pkey = s->cert->key->privatekey; | |
0e1dba93 | 3000 | /* Create context from key and test if sha1 is allowed as digest */ |
b9908bf9 MC |
3001 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
3002 | EVP_PKEY_sign_init(pctx); | |
3003 | if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1()) > 0) { | |
3004 | if (!SSL_USE_SIGALGS(s)) | |
3005 | s->method->ssl3_enc->cert_verify_mac(s, | |
3006 | NID_sha1, | |
3007 | &(data | |
3008 | [MD5_DIGEST_LENGTH])); | |
3009 | } else { | |
3010 | ERR_clear_error(); | |
3011 | } | |
3012 | /* | |
3013 | * For TLS v1.2 send signature algorithm and signature using agreed | |
3014 | * digest and cached handshake records. | |
3015 | */ | |
3016 | if (SSL_USE_SIGALGS(s)) { | |
3017 | long hdatalen = 0; | |
3018 | void *hdata; | |
3019 | const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys]; | |
3020 | hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); | |
3021 | if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) { | |
3022 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); | |
3023 | goto err; | |
0f113f3e | 3024 | } |
b9908bf9 | 3025 | p += 2; |
855a54a9 | 3026 | #ifdef SSL_DEBUG |
b9908bf9 MC |
3027 | fprintf(stderr, "Using TLS 1.2 with client alg %s\n", |
3028 | EVP_MD_name(md)); | |
0f113f3e | 3029 | #endif |
b9908bf9 MC |
3030 | if (!EVP_SignInit_ex(&mctx, md, NULL) |
3031 | || !EVP_SignUpdate(&mctx, hdata, hdatalen) | |
3032 | || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) { | |
3033 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB); | |
3034 | goto err; | |
3035 | } | |
3036 | s2n(u, p); | |
3037 | n = u + 4; | |
3038 | /* Digest cached records and discard handshake buffer */ | |
3039 | if (!ssl3_digest_cached_records(s, 0)) | |
3040 | goto err; | |
3041 | } else | |
bc36ee62 | 3042 | #ifndef OPENSSL_NO_RSA |
b9908bf9 MC |
3043 | if (pkey->type == EVP_PKEY_RSA) { |
3044 | s->method->ssl3_enc->cert_verify_mac(s, NID_md5, &(data[0])); | |
3045 | if (RSA_sign(NID_md5_sha1, data, | |
3046 | MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH, | |
3047 | &(p[2]), &u, pkey->pkey.rsa) <= 0) { | |
3048 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_RSA_LIB); | |
3049 | goto err; | |
3050 | } | |
3051 | s2n(u, p); | |
3052 | n = u + 2; | |
3053 | } else | |
d02b48c6 | 3054 | #endif |
bc36ee62 | 3055 | #ifndef OPENSSL_NO_DSA |
b9908bf9 MC |
3056 | if (pkey->type == EVP_PKEY_DSA) { |
3057 | if (!DSA_sign(pkey->save_type, | |
3058 | &(data[MD5_DIGEST_LENGTH]), | |
3059 | SHA_DIGEST_LENGTH, &(p[2]), | |
3060 | (unsigned int *)&j, pkey->pkey.dsa)) { | |
3061 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_DSA_LIB); | |
3062 | goto err; | |
3063 | } | |
3064 | s2n(j, p); | |
3065 | n = j + 2; | |
3066 | } else | |
ea262260 | 3067 | #endif |
10bf4fc2 | 3068 | #ifndef OPENSSL_NO_EC |
b9908bf9 MC |
3069 | if (pkey->type == EVP_PKEY_EC) { |
3070 | if (!ECDSA_sign(pkey->save_type, | |
3071 | &(data[MD5_DIGEST_LENGTH]), | |
3072 | SHA_DIGEST_LENGTH, &(p[2]), | |
3073 | (unsigned int *)&j, pkey->pkey.ec)) { | |
3074 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_ECDSA_LIB); | |
0f113f3e MC |
3075 | goto err; |
3076 | } | |
b9908bf9 MC |
3077 | s2n(j, p); |
3078 | n = j + 2; | |
3079 | } else | |
3080 | #endif | |
3081 | if (pkey->type == NID_id_GostR3410_2001) { | |
3082 | unsigned char signbuf[64]; | |
3083 | int i; | |
3084 | size_t sigsize = 64; | |
3085 | s->method->ssl3_enc->cert_verify_mac(s, | |
3086 | NID_id_GostR3411_94, data); | |
3087 | if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { | |
3088 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); | |
77d514c5 MC |
3089 | goto err; |
3090 | } | |
b9908bf9 MC |
3091 | for (i = 63, j = 0; i >= 0; j++, i--) { |
3092 | p[2 + j] = signbuf[i]; | |
3093 | } | |
3094 | s2n(j, p); | |
3095 | n = j + 2; | |
3096 | } else { | |
3097 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); | |
3098 | goto err; | |
3099 | } | |
3100 | if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) { | |
3101 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); | |
3102 | goto err; | |
0f113f3e | 3103 | } |
b9908bf9 | 3104 | |
0f113f3e MC |
3105 | EVP_MD_CTX_cleanup(&mctx); |
3106 | EVP_PKEY_CTX_free(pctx); | |
b9908bf9 | 3107 | return 1; |
0f113f3e MC |
3108 | err: |
3109 | EVP_MD_CTX_cleanup(&mctx); | |
3110 | EVP_PKEY_CTX_free(pctx); | |
b9908bf9 | 3111 | return 0; |
0f113f3e MC |
3112 | } |
3113 | ||
3114 | /* | |
3115 | * Check a certificate can be used for client authentication. Currently check | |
3116 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3117 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3118 | */ |
3119 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e MC |
3120 | { |
3121 | unsigned long alg_k; | |
3122 | if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey) | |
3123 | return 0; | |
3124 | /* If no suitable signature algorithm can't use certificate */ | |
d376e57d | 3125 | if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys]) |
0f113f3e MC |
3126 | return 0; |
3127 | /* | |
3128 | * If strict mode check suitability of chain before using it. This also | |
3129 | * adjusts suite B digest if necessary. | |
3130 | */ | |
3131 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3132 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3133 | return 0; | |
3134 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
3135 | /* See if we can use client certificate for fixed DH */ | |
3136 | if (alg_k & (SSL_kDHr | SSL_kDHd)) { | |
a273c6ee | 3137 | int i = s->session->peer_type; |
0f113f3e MC |
3138 | EVP_PKEY *clkey = NULL, *spkey = NULL; |
3139 | clkey = s->cert->key->privatekey; | |
3140 | /* If client key not DH assume it can be used */ | |
3141 | if (EVP_PKEY_id(clkey) != EVP_PKEY_DH) | |
3142 | return 1; | |
3143 | if (i >= 0) | |
a273c6ee | 3144 | spkey = X509_get_pubkey(s->session->peer); |
0f113f3e MC |
3145 | if (spkey) { |
3146 | /* Compare server and client parameters */ | |
3147 | i = EVP_PKEY_cmp_parameters(clkey, spkey); | |
3148 | EVP_PKEY_free(spkey); | |
3149 | if (i != 1) | |
3150 | return 0; | |
3151 | } | |
3152 | s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; | |
3153 | } | |
3154 | return 1; | |
3155 | } | |
0d609395 | 3156 | |
b9908bf9 | 3157 | enum WORK_STATE tls_prepare_client_certificate(SSL *s, enum WORK_STATE wst) |
0f113f3e MC |
3158 | { |
3159 | X509 *x509 = NULL; | |
3160 | EVP_PKEY *pkey = NULL; | |
3161 | int i; | |
3162 | ||
b9908bf9 | 3163 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
3164 | /* Let cert callback update client certificates if required */ |
3165 | if (s->cert->cert_cb) { | |
3166 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3167 | if (i < 0) { | |
3168 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3169 | return WORK_MORE_A; |
0f113f3e MC |
3170 | } |
3171 | if (i == 0) { | |
3172 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 3173 | ossl_statem_set_error(s); |
0f113f3e MC |
3174 | return 0; |
3175 | } | |
3176 | s->rwstate = SSL_NOTHING; | |
3177 | } | |
3178 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
3179 | return WORK_FINISHED_CONTINUE; |
3180 | ||
3181 | /* Fall through to WORK_MORE_B */ | |
3182 | wst = WORK_MORE_B; | |
0f113f3e MC |
3183 | } |
3184 | ||
3185 | /* We need to get a client cert */ | |
b9908bf9 | 3186 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3187 | /* |
3188 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3189 | * return(-1); We then get retied later | |
3190 | */ | |
0f113f3e MC |
3191 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3192 | if (i < 0) { | |
3193 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3194 | return WORK_MORE_B; |
0f113f3e MC |
3195 | } |
3196 | s->rwstate = SSL_NOTHING; | |
3197 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3198 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3199 | i = 0; | |
3200 | } else if (i == 1) { | |
3201 | i = 0; | |
b9908bf9 | 3202 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
3203 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
3204 | } | |
3205 | ||
222561fe | 3206 | X509_free(x509); |
25aaa98a | 3207 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3208 | if (i && !ssl3_check_client_certificate(s)) |
3209 | i = 0; | |
3210 | if (i == 0) { | |
3211 | if (s->version == SSL3_VERSION) { | |
3212 | s->s3->tmp.cert_req = 0; | |
3213 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 3214 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3215 | } else { |
3216 | s->s3->tmp.cert_req = 2; | |
124037fd | 3217 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 3218 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 3219 | ossl_statem_set_error(s); |
dab18ab5 DSH |
3220 | return 0; |
3221 | } | |
0f113f3e MC |
3222 | } |
3223 | } | |
3224 | ||
b9908bf9 | 3225 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3226 | } |
3227 | ||
b9908bf9 MC |
3228 | /* Shouldn't ever get here */ |
3229 | return WORK_ERROR; | |
3230 | } | |
3231 | ||
3232 | int tls_construct_client_certificate(SSL *s) | |
3233 | { | |
3234 | if (!ssl3_output_cert_chain(s, | |
3235 | (s->s3->tmp.cert_req == | |
3236 | 2) ? NULL : s->cert->key)) { | |
3237 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
3238 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 3239 | ossl_statem_set_error(s); |
b9908bf9 | 3240 | return 0; |
0f113f3e | 3241 | } |
b9908bf9 MC |
3242 | |
3243 | return 1; | |
0f113f3e MC |
3244 | } |
3245 | ||
3246 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 3247 | |
36d16f8e | 3248 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e MC |
3249 | { |
3250 | int i, idx; | |
3251 | long alg_k, alg_a; | |
3252 | EVP_PKEY *pkey = NULL; | |
ac38115c | 3253 | int pkey_bits; |
bc36ee62 | 3254 | #ifndef OPENSSL_NO_RSA |
0f113f3e | 3255 | RSA *rsa; |
79df9d62 | 3256 | #endif |
bc36ee62 | 3257 | #ifndef OPENSSL_NO_DH |
0f113f3e | 3258 | DH *dh; |
79df9d62 | 3259 | #endif |
26c79d56 | 3260 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 3261 | |
0f113f3e MC |
3262 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3263 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3264 | |
0f113f3e | 3265 | /* we don't have a certificate */ |
55a9a16f | 3266 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 3267 | return (1); |
bc36ee62 | 3268 | #ifndef OPENSSL_NO_RSA |
8d92c1f8 | 3269 | rsa = s->s3->peer_rsa_tmp; |
79df9d62 | 3270 | #endif |
bc36ee62 | 3271 | #ifndef OPENSSL_NO_DH |
8d92c1f8 | 3272 | dh = s->s3->peer_dh_tmp; |
79df9d62 | 3273 | #endif |
d02b48c6 | 3274 | |
0f113f3e | 3275 | /* This is the passed certificate */ |
d02b48c6 | 3276 | |
a273c6ee | 3277 | idx = s->session->peer_type; |
10bf4fc2 | 3278 | #ifndef OPENSSL_NO_EC |
0f113f3e | 3279 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 3280 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
3281 | /* check failed */ |
3282 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3283 | goto f_err; | |
3284 | } else { | |
3285 | return 1; | |
3286 | } | |
3287 | } else if (alg_a & SSL_aECDSA) { | |
3288 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3289 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
3290 | goto f_err; | |
3291 | } else if (alg_k & (SSL_kECDHr | SSL_kECDHe)) { | |
3292 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_ECDH_CERT); | |
3293 | goto f_err; | |
3294 | } | |
3295 | #endif | |
a273c6ee | 3296 | pkey = X509_get_pubkey(s->session->peer); |
ac38115c | 3297 | pkey_bits = EVP_PKEY_bits(pkey); |
a273c6ee | 3298 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
3299 | EVP_PKEY_free(pkey); |
3300 | ||
3301 | /* Check that we have a certificate if we require one */ | |
3302 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
3303 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3304 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
3305 | goto f_err; | |
3306 | } | |
bc36ee62 | 3307 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3308 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
3309 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3310 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
3311 | goto f_err; | |
3312 | } | |
d02b48c6 | 3313 | #endif |
bc36ee62 | 3314 | #ifndef OPENSSL_NO_RSA |
7689082b | 3315 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
26c79d56 KR |
3316 | if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && |
3317 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3318 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3319 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3320 | goto f_err; | |
3321 | } else if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) { | |
3322 | if (pkey_bits <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { | |
3323 | if (!has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3324 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3325 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3326 | goto f_err; | |
3327 | } | |
3328 | if (rsa != NULL) { | |
3329 | /* server key exchange is not allowed. */ | |
3330 | al = SSL_AD_INTERNAL_ERROR; | |
3331 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
3332 | goto f_err; | |
3333 | } | |
3334 | } | |
3335 | } | |
0f113f3e | 3336 | } |
79df9d62 | 3337 | #endif |
bc36ee62 | 3338 | #ifndef OPENSSL_NO_DH |
26c79d56 KR |
3339 | if ((alg_k & SSL_kDHE) && (dh == NULL)) { |
3340 | al = SSL_AD_INTERNAL_ERROR; | |
3341 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
3342 | goto f_err; |
3343 | } else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) && | |
3344 | !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) { | |
3345 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3346 | SSL_R_MISSING_DH_RSA_CERT); | |
3347 | goto f_err; | |
3348 | } | |
3349 | # ifndef OPENSSL_NO_DSA | |
3350 | else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) && | |
3351 | !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) { | |
3352 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3353 | SSL_R_MISSING_DH_DSA_CERT); | |
3354 | goto f_err; | |
3355 | } | |
3356 | # endif | |
d02b48c6 RE |
3357 | #endif |
3358 | ||
ac38115c KR |
3359 | if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && |
3360 | pkey_bits > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { | |
bc36ee62 | 3361 | #ifndef OPENSSL_NO_RSA |
0f113f3e | 3362 | if (alg_k & SSL_kRSA) { |
26c79d56 KR |
3363 | if (rsa == NULL) { |
3364 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3365 | SSL_R_MISSING_EXPORT_TMP_RSA_KEY); | |
3366 | goto f_err; | |
3367 | } else if (RSA_bits(rsa) > | |
0f113f3e | 3368 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { |
26c79d56 KR |
3369 | /* We have a temporary RSA key but it's too large. */ |
3370 | al = SSL_AD_EXPORT_RESTRICTION; | |
0f113f3e MC |
3371 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, |
3372 | SSL_R_MISSING_EXPORT_TMP_RSA_KEY); | |
3373 | goto f_err; | |
3374 | } | |
3375 | } else | |
d02b48c6 | 3376 | #endif |
bc36ee62 | 3377 | #ifndef OPENSSL_NO_DH |
26c79d56 KR |
3378 | if (alg_k & SSL_kDHE) { |
3379 | if (DH_bits(dh) > | |
0f113f3e | 3380 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { |
26c79d56 KR |
3381 | /* We have a temporary DH key but it's too large. */ |
3382 | al = SSL_AD_EXPORT_RESTRICTION; | |
0f113f3e MC |
3383 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, |
3384 | SSL_R_MISSING_EXPORT_TMP_DH_KEY); | |
3385 | goto f_err; | |
3386 | } | |
26c79d56 KR |
3387 | } else if (alg_k & (SSL_kDHr | SSL_kDHd)) { |
3388 | /* The cert should have had an export DH key. */ | |
3389 | al = SSL_AD_EXPORT_RESTRICTION; | |
3390 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3391 | SSL_R_MISSING_EXPORT_TMP_DH_KEY); | |
3392 | goto f_err; | |
0f113f3e MC |
3393 | } else |
3394 | #endif | |
3395 | { | |
3396 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3397 | SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); | |
3398 | goto f_err; | |
3399 | } | |
3400 | } | |
3401 | return (1); | |
3402 | f_err: | |
26c79d56 | 3403 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
3404 | return (0); |
3405 | } | |
3406 | ||
e481f9b9 | 3407 | #ifndef OPENSSL_NO_NEXTPROTONEG |
b9908bf9 MC |
3408 | int tls_construct_next_proto(SSL *s) |
3409 | { | |
3410 | unsigned int len, padding_len; | |
3411 | unsigned char *d; | |
3412 | ||
3413 | len = s->next_proto_negotiated_len; | |
3414 | padding_len = 32 - ((len + 2) % 32); | |
3415 | d = (unsigned char *)s->init_buf->data; | |
3416 | d[4] = len; | |
3417 | memcpy(d + 5, s->next_proto_negotiated, len); | |
3418 | d[5 + len] = padding_len; | |
3419 | memset(d + 6 + len, 0, padding_len); | |
3420 | *(d++) = SSL3_MT_NEXT_PROTO; | |
3421 | l2n3(2 + len + padding_len, d); | |
3422 | s->init_num = 4 + 2 + len + padding_len; | |
3423 | s->init_off = 0; | |
3424 | ||
3425 | return 1; | |
3426 | } | |
6434abbf | 3427 | #endif |
368888bc DSH |
3428 | |
3429 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) | |
0f113f3e MC |
3430 | { |
3431 | int i = 0; | |
368888bc | 3432 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3433 | if (s->ctx->client_cert_engine) { |
3434 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3435 | SSL_get_client_CA_list(s), | |
3436 | px509, ppkey, NULL, NULL, NULL); | |
3437 | if (i != 0) | |
3438 | return i; | |
3439 | } | |
3440 | #endif | |
3441 | if (s->ctx->client_cert_cb) | |
3442 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3443 | return i; | |
3444 | } | |
d45ba43d MC |
3445 | |
3446 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, | |
e9fa092e | 3447 | unsigned char *p) |
d45ba43d MC |
3448 | { |
3449 | int i, j = 0; | |
3450 | SSL_CIPHER *c; | |
3451 | unsigned char *q; | |
3452 | int empty_reneg_info_scsv = !s->renegotiate; | |
3453 | /* Set disabled masks for this session */ | |
3454 | ssl_set_client_disabled(s); | |
3455 | ||
3456 | if (sk == NULL) | |
3457 | return (0); | |
3458 | q = p; | |
d45ba43d MC |
3459 | |
3460 | for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { | |
3461 | c = sk_SSL_CIPHER_value(sk, i); | |
3462 | /* Skip disabled ciphers */ | |
3463 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) | |
3464 | continue; | |
3465 | #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL | |
3466 | if (c->id == SSL3_CK_SCSV) { | |
3467 | if (!empty_reneg_info_scsv) | |
3468 | continue; | |
3469 | else | |
3470 | empty_reneg_info_scsv = 0; | |
3471 | } | |
3472 | #endif | |
e9fa092e | 3473 | j = s->method->put_cipher_by_char(c, p); |
d45ba43d MC |
3474 | p += j; |
3475 | } | |
3476 | /* | |
3477 | * If p == q, no ciphers; caller indicates an error. Otherwise, add | |
3478 | * applicable SCSVs. | |
3479 | */ | |
3480 | if (p != q) { | |
3481 | if (empty_reneg_info_scsv) { | |
3482 | static SSL_CIPHER scsv = { | |
3483 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3484 | }; | |
e9fa092e | 3485 | j = s->method->put_cipher_by_char(&scsv, p); |
d45ba43d MC |
3486 | p += j; |
3487 | #ifdef OPENSSL_RI_DEBUG | |
3488 | fprintf(stderr, | |
3489 | "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n"); | |
3490 | #endif | |
3491 | } | |
3492 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3493 | static SSL_CIPHER scsv = { | |
3494 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3495 | }; | |
e9fa092e | 3496 | j = s->method->put_cipher_by_char(&scsv, p); |
d45ba43d MC |
3497 | p += j; |
3498 | } | |
3499 | } | |
3500 | ||
3501 | return (p - q); | |
3502 | } |