]>
Commit | Line | Data |
---|---|---|
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 */ | |
b7fa1f98 MC |
185 | if ((s->version > SSL3_VERSION |
186 | && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)) | |
187 | || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
188 | return 0; |
189 | ||
190 | return 1; | |
191 | } | |
192 | ||
193 | /* | |
a455d0f6 | 194 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
195 | * |
196 | * Return values are: | |
197 | * 1: Yes | |
198 | * 0: No | |
a455d0f6 | 199 | * -1: Error |
61ae935a | 200 | */ |
a455d0f6 | 201 | static int key_exchange_expected(SSL *s) |
61ae935a MC |
202 | { |
203 | long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
204 | ||
205 | /* | |
206 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 207 | * ciphersuite or for SRP |
61ae935a | 208 | */ |
a455d0f6 MC |
209 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
210 | | SSL_kSRP)) { | |
211 | return 1; | |
61ae935a MC |
212 | } |
213 | ||
a455d0f6 | 214 | return 0; |
61ae935a MC |
215 | } |
216 | ||
217 | /* | |
8481f583 MC |
218 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
219 | * handshake state transitions when the client is reading messages from the | |
220 | * server. The message type that the server has sent is provided in |mt|. The | |
221 | * current state is in |s->statem.hand_state|. | |
61ae935a MC |
222 | * |
223 | * Return values are: | |
224 | * 1: Success (transition allowed) | |
225 | * 0: Error (transition not allowed) | |
226 | */ | |
8481f583 | 227 | int ossl_statem_client_read_transition(SSL *s, int mt) |
61ae935a | 228 | { |
d6f1a6e9 | 229 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 230 | int ske_expected; |
61ae935a MC |
231 | |
232 | switch(st->hand_state) { | |
233 | case TLS_ST_CW_CLNT_HELLO: | |
234 | if (mt == SSL3_MT_SERVER_HELLO) { | |
235 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
236 | return 1; | |
237 | } | |
238 | ||
239 | if (SSL_IS_DTLS(s)) { | |
240 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
241 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
242 | return 1; | |
243 | } | |
244 | } | |
245 | break; | |
246 | ||
247 | case TLS_ST_CR_SRVR_HELLO: | |
248 | if (s->hit) { | |
249 | if (s->tlsext_ticket_expected) { | |
250 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
251 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
252 | return 1; | |
253 | } | |
254 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
255 | st->hand_state = TLS_ST_CR_CHANGE; | |
256 | return 1; | |
257 | } | |
258 | } else { | |
259 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
260 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
261 | return 1; | |
ad3819c2 MC |
262 | } else if (s->version >= TLS1_VERSION |
263 | && s->tls_session_secret_cb != NULL | |
264 | && s->session->tlsext_tick != NULL | |
265 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
266 | /* | |
267 | * Normally, we can tell if the server is resuming the session | |
268 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
269 | * the next server message after the ServerHello to determine if | |
270 | * the server is resuming. | |
271 | */ | |
272 | s->hit = 1; | |
273 | st->hand_state = TLS_ST_CR_CHANGE; | |
274 | return 1; | |
61ae935a MC |
275 | } else if (!(s->s3->tmp.new_cipher->algorithm_auth |
276 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { | |
277 | if (mt == SSL3_MT_CERTIFICATE) { | |
278 | st->hand_state = TLS_ST_CR_CERT; | |
279 | return 1; | |
280 | } | |
281 | } else { | |
a455d0f6 MC |
282 | ske_expected = key_exchange_expected(s); |
283 | if (ske_expected < 0) | |
284 | return 0; | |
285 | /* SKE is optional for some PSK ciphersuites */ | |
286 | if (ske_expected | |
287 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) | |
288 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
289 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { | |
290 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
291 | return 1; | |
292 | } | |
293 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
61ae935a MC |
294 | && cert_req_allowed(s)) { |
295 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
296 | return 1; | |
a455d0f6 | 297 | } else if (mt == SSL3_MT_SERVER_DONE) { |
61ae935a MC |
298 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
299 | return 1; | |
61ae935a MC |
300 | } |
301 | } | |
302 | } | |
303 | break; | |
304 | ||
305 | case TLS_ST_CR_CERT: | |
306 | if (s->tlsext_status_expected) { | |
307 | if (mt == SSL3_MT_CERTIFICATE_STATUS) { | |
308 | st->hand_state = TLS_ST_CR_CERT_STATUS; | |
309 | return 1; | |
310 | } | |
a455d0f6 MC |
311 | return 0; |
312 | } | |
313 | /* Fall through */ | |
314 | ||
315 | case TLS_ST_CR_CERT_STATUS: | |
316 | ske_expected = key_exchange_expected(s); | |
317 | if (ske_expected < 0) | |
318 | return 0; | |
319 | /* SKE is optional for some PSK ciphersuites */ | |
320 | if (ske_expected | |
321 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) | |
322 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
61ae935a MC |
323 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
324 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
325 | return 1; | |
61ae935a | 326 | } |
a455d0f6 | 327 | return 0; |
61ae935a | 328 | } |
a455d0f6 | 329 | /* Fall through */ |
61ae935a | 330 | |
a455d0f6 MC |
331 | case TLS_ST_CR_KEY_EXCH: |
332 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
333 | if (cert_req_allowed(s)) { | |
61ae935a MC |
334 | st->hand_state = TLS_ST_CR_CERT_REQ; |
335 | return 1; | |
61ae935a | 336 | } |
a455d0f6 | 337 | return 0; |
61ae935a | 338 | } |
a455d0f6 | 339 | /* Fall through */ |
61ae935a MC |
340 | |
341 | case TLS_ST_CR_CERT_REQ: | |
342 | if (mt == SSL3_MT_SERVER_DONE) { | |
343 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
344 | return 1; | |
345 | } | |
346 | break; | |
347 | ||
348 | case TLS_ST_CW_FINISHED: | |
349 | if (mt == SSL3_MT_NEWSESSION_TICKET && s->tlsext_ticket_expected) { | |
350 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
351 | return 1; | |
352 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
353 | st->hand_state = TLS_ST_CR_CHANGE; | |
354 | return 1; | |
355 | } | |
356 | break; | |
357 | ||
358 | case TLS_ST_CR_SESSION_TICKET: | |
359 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
360 | st->hand_state = TLS_ST_CR_CHANGE; | |
361 | return 1; | |
362 | } | |
363 | break; | |
364 | ||
365 | case TLS_ST_CR_CHANGE: | |
366 | if (mt == SSL3_MT_FINISHED) { | |
367 | st->hand_state = TLS_ST_CR_FINISHED; | |
368 | return 1; | |
369 | } | |
370 | break; | |
371 | ||
372 | default: | |
373 | break; | |
374 | } | |
375 | ||
376 | /* No valid transition found */ | |
377 | return 0; | |
378 | } | |
379 | ||
380 | /* | |
381 | * client_write_transition() works out what handshake state to move to next | |
382 | * when the client is writing messages to be sent to the server. | |
383 | */ | |
8481f583 | 384 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 385 | { |
d6f1a6e9 | 386 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
387 | |
388 | switch(st->hand_state) { | |
389 | case TLS_ST_OK: | |
390 | /* Renegotiation - fall through */ | |
391 | case TLS_ST_BEFORE: | |
392 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
393 | return WRITE_TRAN_CONTINUE; | |
394 | ||
395 | case TLS_ST_CW_CLNT_HELLO: | |
396 | /* | |
397 | * No transition at the end of writing because we don't know what | |
398 | * we will be sent | |
399 | */ | |
400 | return WRITE_TRAN_FINISHED; | |
401 | ||
402 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: | |
403 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
404 | return WRITE_TRAN_CONTINUE; | |
405 | ||
406 | case TLS_ST_CR_SRVR_DONE: | |
407 | if (s->s3->tmp.cert_req) | |
408 | st->hand_state = TLS_ST_CW_CERT; | |
409 | else | |
410 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
411 | return WRITE_TRAN_CONTINUE; | |
412 | ||
413 | case TLS_ST_CW_CERT: | |
414 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
415 | return WRITE_TRAN_CONTINUE; | |
416 | ||
417 | case TLS_ST_CW_KEY_EXCH: | |
418 | /* | |
419 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
420 | * sent, but no verify packet is sent | |
421 | */ | |
422 | /* | |
423 | * XXX: For now, we do not support client authentication in ECDH | |
424 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
425 | * need to skip the certificate verify message when client's | |
426 | * ECDH public key is sent inside the client certificate. | |
427 | */ | |
428 | if (s->s3->tmp.cert_req == 1) { | |
429 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
430 | } else { | |
431 | st->hand_state = TLS_ST_CW_CHANGE; | |
432 | } | |
433 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
434 | st->hand_state = TLS_ST_CW_CHANGE; | |
435 | } | |
436 | return WRITE_TRAN_CONTINUE; | |
437 | ||
438 | case TLS_ST_CW_CERT_VRFY: | |
439 | st->hand_state = TLS_ST_CW_CHANGE; | |
440 | return WRITE_TRAN_CONTINUE; | |
441 | ||
442 | case TLS_ST_CW_CHANGE: | |
443 | #if defined(OPENSSL_NO_NEXTPROTONEG) | |
444 | st->hand_state = TLS_ST_CW_FINISHED; | |
445 | #else | |
446 | if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen) | |
447 | st->hand_state = TLS_ST_CW_NEXT_PROTO; | |
448 | else | |
449 | st->hand_state = TLS_ST_CW_FINISHED; | |
450 | #endif | |
451 | return WRITE_TRAN_CONTINUE; | |
452 | ||
453 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
454 | case TLS_ST_CW_NEXT_PROTO: | |
455 | st->hand_state = TLS_ST_CW_FINISHED; | |
456 | return WRITE_TRAN_CONTINUE; | |
457 | #endif | |
458 | ||
459 | case TLS_ST_CW_FINISHED: | |
460 | if (s->hit) { | |
461 | st->hand_state = TLS_ST_OK; | |
fe3a3291 | 462 | ossl_statem_set_in_init(s, 0); |
61ae935a MC |
463 | return WRITE_TRAN_CONTINUE; |
464 | } else { | |
465 | return WRITE_TRAN_FINISHED; | |
466 | } | |
467 | ||
468 | case TLS_ST_CR_FINISHED: | |
469 | if (s->hit) { | |
470 | st->hand_state = TLS_ST_CW_CHANGE; | |
471 | return WRITE_TRAN_CONTINUE; | |
472 | } else { | |
473 | st->hand_state = TLS_ST_OK; | |
fe3a3291 | 474 | ossl_statem_set_in_init(s, 0); |
61ae935a MC |
475 | return WRITE_TRAN_CONTINUE; |
476 | } | |
477 | ||
478 | default: | |
479 | /* Shouldn't happen */ | |
480 | return WRITE_TRAN_ERROR; | |
481 | } | |
482 | } | |
483 | ||
484 | /* | |
485 | * Perform any pre work that needs to be done prior to sending a message from | |
486 | * the client to the server. | |
487 | */ | |
8481f583 | 488 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 489 | { |
d6f1a6e9 | 490 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
491 | |
492 | switch(st->hand_state) { | |
493 | case TLS_ST_CW_CLNT_HELLO: | |
494 | s->shutdown = 0; | |
495 | if (SSL_IS_DTLS(s)) { | |
496 | /* every DTLS ClientHello resets Finished MAC */ | |
497 | ssl3_init_finished_mac(s); | |
498 | } | |
499 | break; | |
500 | ||
501 | case TLS_ST_CW_CERT: | |
502 | return tls_prepare_client_certificate(s, wst); | |
503 | ||
504 | case TLS_ST_CW_CHANGE: | |
505 | if (SSL_IS_DTLS(s)) { | |
506 | if (s->hit) { | |
507 | /* | |
508 | * We're into the last flight so we don't retransmit these | |
509 | * messages unless we need to. | |
510 | */ | |
511 | st->use_timer = 0; | |
512 | } | |
513 | #ifndef OPENSSL_NO_SCTP | |
514 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
515 | return dtls_wait_for_dry(s); | |
516 | #endif | |
517 | } | |
518 | return WORK_FINISHED_CONTINUE; | |
519 | ||
520 | case TLS_ST_OK: | |
521 | return tls_finish_handshake(s, wst); | |
522 | ||
523 | default: | |
524 | /* No pre work to be done */ | |
525 | break; | |
526 | } | |
527 | ||
528 | return WORK_FINISHED_CONTINUE; | |
529 | } | |
530 | ||
531 | /* | |
532 | * Perform any work that needs to be done after sending a message from the | |
533 | * client to the server. | |
534 | */ | |
8481f583 | 535 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 536 | { |
d6f1a6e9 | 537 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
538 | |
539 | s->init_num = 0; | |
540 | ||
541 | switch(st->hand_state) { | |
542 | case TLS_ST_CW_CLNT_HELLO: | |
543 | if (SSL_IS_DTLS(s) && s->d1->cookie_len > 0 && statem_flush(s) != 1) | |
544 | return WORK_MORE_A; | |
545 | #ifndef OPENSSL_NO_SCTP | |
546 | /* Disable buffering for SCTP */ | |
547 | if (!SSL_IS_DTLS(s) || !BIO_dgram_is_sctp(SSL_get_wbio(s))) { | |
548 | #endif | |
549 | /* | |
550 | * turn on buffering for the next lot of output | |
551 | */ | |
552 | if (s->bbio != s->wbio) | |
553 | s->wbio = BIO_push(s->bbio, s->wbio); | |
554 | #ifndef OPENSSL_NO_SCTP | |
555 | } | |
556 | #endif | |
557 | if (SSL_IS_DTLS(s)) { | |
558 | /* Treat the next message as the first packet */ | |
559 | s->first_packet = 1; | |
560 | } | |
561 | break; | |
562 | ||
563 | case TLS_ST_CW_KEY_EXCH: | |
564 | if (tls_client_key_exchange_post_work(s) == 0) | |
565 | return WORK_ERROR; | |
566 | break; | |
567 | ||
568 | case TLS_ST_CW_CHANGE: | |
569 | s->session->cipher = s->s3->tmp.new_cipher; | |
570 | #ifdef OPENSSL_NO_COMP | |
571 | s->session->compress_meth = 0; | |
572 | #else | |
573 | if (s->s3->tmp.new_compression == NULL) | |
574 | s->session->compress_meth = 0; | |
575 | else | |
576 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
577 | #endif | |
578 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
579 | return WORK_ERROR; | |
580 | ||
581 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
582 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
583 | return WORK_ERROR; | |
584 | ||
585 | if (SSL_IS_DTLS(s)) { | |
586 | #ifndef OPENSSL_NO_SCTP | |
587 | if (s->hit) { | |
588 | /* | |
589 | * Change to new shared key of SCTP-Auth, will be ignored if | |
590 | * no SCTP used. | |
591 | */ | |
592 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
593 | 0, NULL); | |
594 | } | |
595 | #endif | |
596 | ||
597 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
598 | } | |
599 | break; | |
600 | ||
601 | case TLS_ST_CW_FINISHED: | |
602 | #ifndef OPENSSL_NO_SCTP | |
603 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
604 | /* | |
605 | * Change to new shared key of SCTP-Auth, will be ignored if | |
606 | * no SCTP used. | |
607 | */ | |
608 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
609 | 0, NULL); | |
610 | } | |
611 | #endif | |
612 | if (statem_flush(s) != 1) | |
613 | return WORK_MORE_B; | |
61ae935a MC |
614 | break; |
615 | ||
616 | default: | |
617 | /* No post work to be done */ | |
618 | break; | |
619 | } | |
620 | ||
621 | return WORK_FINISHED_CONTINUE; | |
622 | } | |
623 | ||
624 | /* | |
625 | * Construct a message to be sent from the client to the server. | |
626 | * | |
627 | * Valid return values are: | |
628 | * 1: Success | |
629 | * 0: Error | |
630 | */ | |
8481f583 | 631 | int ossl_statem_client_construct_message(SSL *s) |
61ae935a | 632 | { |
d6f1a6e9 | 633 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
634 | |
635 | switch(st->hand_state) { | |
636 | case TLS_ST_CW_CLNT_HELLO: | |
637 | return tls_construct_client_hello(s); | |
638 | ||
639 | case TLS_ST_CW_CERT: | |
640 | return tls_construct_client_certificate(s); | |
641 | ||
642 | case TLS_ST_CW_KEY_EXCH: | |
643 | return tls_construct_client_key_exchange(s); | |
644 | ||
645 | case TLS_ST_CW_CERT_VRFY: | |
646 | return tls_construct_client_verify(s); | |
647 | ||
648 | case TLS_ST_CW_CHANGE: | |
649 | if (SSL_IS_DTLS(s)) | |
650 | return dtls_construct_change_cipher_spec(s); | |
651 | else | |
652 | return tls_construct_change_cipher_spec(s); | |
653 | ||
654 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
655 | case TLS_ST_CW_NEXT_PROTO: | |
656 | return tls_construct_next_proto(s); | |
657 | #endif | |
658 | case TLS_ST_CW_FINISHED: | |
659 | return tls_construct_finished(s, | |
660 | s->method-> | |
661 | ssl3_enc->client_finished_label, | |
662 | s->method-> | |
663 | ssl3_enc->client_finished_label_len); | |
664 | ||
665 | default: | |
666 | /* Shouldn't happen */ | |
667 | break; | |
668 | } | |
669 | ||
670 | return 0; | |
671 | } | |
672 | ||
673 | /* | |
674 | * Returns the maximum allowed length for the current message that we are | |
675 | * reading. Excludes the message header. | |
676 | */ | |
8481f583 | 677 | unsigned long ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 678 | { |
d6f1a6e9 | 679 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
680 | |
681 | switch(st->hand_state) { | |
682 | case TLS_ST_CR_SRVR_HELLO: | |
683 | return SERVER_HELLO_MAX_LENGTH; | |
684 | ||
685 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: | |
686 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
687 | ||
688 | case TLS_ST_CR_CERT: | |
689 | return s->max_cert_list; | |
690 | ||
691 | case TLS_ST_CR_CERT_STATUS: | |
692 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
693 | ||
694 | case TLS_ST_CR_KEY_EXCH: | |
695 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
696 | ||
697 | case TLS_ST_CR_CERT_REQ: | |
698 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
699 | ||
700 | case TLS_ST_CR_SRVR_DONE: | |
701 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
702 | ||
703 | case TLS_ST_CR_CHANGE: | |
704 | return CCS_MAX_LENGTH; | |
705 | ||
706 | case TLS_ST_CR_SESSION_TICKET: | |
707 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
708 | ||
709 | case TLS_ST_CR_FINISHED: | |
710 | return FINISHED_MAX_LENGTH; | |
711 | ||
712 | default: | |
713 | /* Shouldn't happen */ | |
714 | break; | |
715 | } | |
716 | ||
717 | return 0; | |
718 | } | |
719 | ||
720 | /* | |
721 | * Process a message that the client has been received from the server. | |
722 | */ | |
8481f583 | 723 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 724 | { |
d6f1a6e9 | 725 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
726 | |
727 | switch(st->hand_state) { | |
728 | case TLS_ST_CR_SRVR_HELLO: | |
729 | return tls_process_server_hello(s, pkt); | |
730 | ||
731 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: | |
732 | return dtls_process_hello_verify(s, pkt); | |
733 | ||
734 | case TLS_ST_CR_CERT: | |
735 | return tls_process_server_certificate(s, pkt); | |
736 | ||
737 | case TLS_ST_CR_CERT_STATUS: | |
738 | return tls_process_cert_status(s, pkt); | |
739 | ||
740 | case TLS_ST_CR_KEY_EXCH: | |
741 | return tls_process_key_exchange(s, pkt); | |
742 | ||
743 | case TLS_ST_CR_CERT_REQ: | |
744 | return tls_process_certificate_request(s, pkt); | |
745 | ||
746 | case TLS_ST_CR_SRVR_DONE: | |
747 | return tls_process_server_done(s, pkt); | |
748 | ||
749 | case TLS_ST_CR_CHANGE: | |
750 | return tls_process_change_cipher_spec(s, pkt); | |
751 | ||
752 | case TLS_ST_CR_SESSION_TICKET: | |
753 | return tls_process_new_session_ticket(s, pkt); | |
754 | ||
755 | case TLS_ST_CR_FINISHED: | |
756 | return tls_process_finished(s, pkt); | |
757 | ||
758 | default: | |
759 | /* Shouldn't happen */ | |
760 | break; | |
761 | } | |
762 | ||
763 | return MSG_PROCESS_ERROR; | |
764 | } | |
765 | ||
766 | /* | |
767 | * Perform any further processing required following the receipt of a message | |
768 | * from the server | |
769 | */ | |
8481f583 | 770 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 771 | { |
d6f1a6e9 | 772 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
773 | |
774 | switch(st->hand_state) { | |
775 | #ifndef OPENSSL_NO_SCTP | |
776 | case TLS_ST_CR_SRVR_DONE: | |
777 | /* We only get here if we are using SCTP and we are renegotiating */ | |
778 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) { | |
779 | s->s3->in_read_app_data = 2; | |
780 | s->rwstate = SSL_READING; | |
781 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
782 | BIO_set_retry_read(SSL_get_rbio(s)); | |
fe3a3291 | 783 | ossl_statem_set_sctp_read_sock(s, 1); |
61ae935a MC |
784 | return WORK_MORE_A; |
785 | } | |
fe3a3291 | 786 | ossl_statem_set_sctp_read_sock(s, 0); |
61ae935a MC |
787 | return WORK_FINISHED_STOP; |
788 | #endif | |
789 | ||
61ae935a MC |
790 | default: |
791 | break; | |
792 | } | |
793 | ||
794 | /* Shouldn't happen */ | |
795 | return WORK_ERROR; | |
796 | } | |
797 | ||
d45ba43d MC |
798 | /* |
799 | * Work out what version we should be using for the initial ClientHello if | |
800 | * the version is currently set to (D)TLS_ANY_VERSION. | |
801 | * Returns 1 on success | |
802 | * Returns 0 on error | |
803 | */ | |
804 | static int ssl_set_version(SSL *s) | |
805 | { | |
806 | unsigned long mask, options = s->options; | |
807 | ||
808 | if (s->method->version == TLS_ANY_VERSION) { | |
809 | /* | |
810 | * SSL_OP_NO_X disables all protocols above X *if* there are | |
811 | * some protocols below X enabled. This is required in order | |
812 | * to maintain "version capability" vector contiguous. So | |
813 | * that if application wants to disable TLS1.0 in favour of | |
814 | * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the | |
815 | * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3. | |
816 | */ | |
817 | mask = SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1 | |
818 | #if !defined(OPENSSL_NO_SSL3) | |
819 | | SSL_OP_NO_SSLv3 | |
820 | #endif | |
821 | ; | |
822 | #if !defined(OPENSSL_NO_TLS1_2_CLIENT) | |
823 | if (options & SSL_OP_NO_TLSv1_2) { | |
824 | if ((options & mask) != mask) { | |
825 | s->version = TLS1_1_VERSION; | |
826 | } else { | |
827 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE); | |
828 | return 0; | |
829 | } | |
830 | } else { | |
831 | s->version = TLS1_2_VERSION; | |
832 | } | |
833 | #else | |
834 | if ((options & mask) == mask) { | |
835 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE); | |
836 | return 0; | |
837 | } | |
838 | s->version = TLS1_1_VERSION; | |
839 | #endif | |
840 | ||
841 | mask &= ~SSL_OP_NO_TLSv1_1; | |
842 | if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask) | |
843 | s->version = TLS1_VERSION; | |
844 | mask &= ~SSL_OP_NO_TLSv1; | |
845 | #if !defined(OPENSSL_NO_SSL3) | |
846 | if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask) | |
847 | s->version = SSL3_VERSION; | |
848 | #endif | |
849 | ||
850 | if (s->version != TLS1_2_VERSION && tls1_suiteb(s)) { | |
851 | SSLerr(SSL_F_SSL_SET_VERSION, | |
852 | SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE); | |
853 | return 0; | |
854 | } | |
855 | ||
856 | if (s->version == SSL3_VERSION && FIPS_mode()) { | |
857 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); | |
858 | return 0; | |
859 | } | |
860 | ||
861 | } else if (s->method->version == DTLS_ANY_VERSION) { | |
862 | /* Determine which DTLS version to use */ | |
863 | /* If DTLS 1.2 disabled correct the version number */ | |
864 | if (options & SSL_OP_NO_DTLSv1_2) { | |
865 | if (tls1_suiteb(s)) { | |
866 | SSLerr(SSL_F_SSL_SET_VERSION, | |
867 | SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE); | |
868 | return 0; | |
869 | } | |
870 | /* | |
871 | * Disabling all versions is silly: return an error. | |
872 | */ | |
873 | if (options & SSL_OP_NO_DTLSv1) { | |
874 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_WRONG_SSL_VERSION); | |
875 | return 0; | |
876 | } | |
877 | /* | |
878 | * Update method so we don't use any DTLS 1.2 features. | |
879 | */ | |
880 | s->method = DTLSv1_client_method(); | |
881 | s->version = DTLS1_VERSION; | |
882 | } else { | |
883 | /* | |
884 | * We only support one version: update method | |
885 | */ | |
886 | if (options & SSL_OP_NO_DTLSv1) | |
887 | s->method = DTLSv1_2_client_method(); | |
888 | s->version = DTLS1_2_VERSION; | |
889 | } | |
890 | } | |
891 | ||
892 | s->client_version = s->version; | |
893 | ||
894 | return 1; | |
895 | } | |
896 | ||
b9908bf9 | 897 | int tls_construct_client_hello(SSL *s) |
0f113f3e MC |
898 | { |
899 | unsigned char *buf; | |
900 | unsigned char *p, *d; | |
901 | int i; | |
902 | unsigned long l; | |
903 | int al = 0; | |
09b6c2ef | 904 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
905 | int j; |
906 | SSL_COMP *comp; | |
907 | #endif | |
b9908bf9 | 908 | SSL_SESSION *sess = s->session; |
0f113f3e MC |
909 | |
910 | buf = (unsigned char *)s->init_buf->data; | |
0f113f3e | 911 | |
b9908bf9 MC |
912 | /* Work out what SSL/TLS/DTLS version to use */ |
913 | if (ssl_set_version(s) == 0) | |
914 | goto err; | |
0f113f3e | 915 | |
b9908bf9 | 916 | if ((sess == NULL) || (sess->ssl_version != s->version) || |
0f113f3e | 917 | /* |
b9908bf9 MC |
918 | * In the case of EAP-FAST, we can have a pre-shared |
919 | * "ticket" without a session ID. | |
0f113f3e | 920 | */ |
b9908bf9 MC |
921 | (!sess->session_id_length && !sess->tlsext_tick) || |
922 | (sess->not_resumable)) { | |
923 | if (!ssl_get_new_session(s, 0)) | |
e1b568dd | 924 | goto err; |
b9908bf9 MC |
925 | } |
926 | /* else use the pre-loaded session */ | |
0f113f3e | 927 | |
b9908bf9 | 928 | p = s->s3->client_random; |
0f113f3e | 929 | |
b9908bf9 MC |
930 | /* |
931 | * for DTLS if client_random is initialized, reuse it, we are | |
932 | * required to use same upon reply to HelloVerify | |
933 | */ | |
934 | if (SSL_IS_DTLS(s)) { | |
935 | size_t idx; | |
936 | i = 1; | |
937 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
938 | if (p[idx]) { | |
939 | i = 0; | |
940 | break; | |
0f113f3e | 941 | } |
0f113f3e | 942 | } |
b9908bf9 MC |
943 | } else |
944 | i = 1; | |
0f113f3e | 945 | |
b9908bf9 MC |
946 | if (i && ssl_fill_hello_random(s, 0, p, |
947 | sizeof(s->s3->client_random)) <= 0) | |
948 | goto err; | |
949 | ||
950 | /* Do the message type and length last */ | |
951 | d = p = ssl_handshake_start(s); | |
952 | ||
953 | /*- | |
954 | * version indicates the negotiated version: for example from | |
955 | * an SSLv2/v3 compatible client hello). The client_version | |
956 | * field is the maximum version we permit and it is also | |
957 | * used in RSA encrypted premaster secrets. Some servers can | |
958 | * choke if we initially report a higher version then | |
959 | * renegotiate to a lower one in the premaster secret. This | |
960 | * didn't happen with TLS 1.0 as most servers supported it | |
961 | * but it can with TLS 1.1 or later if the server only supports | |
962 | * 1.0. | |
963 | * | |
964 | * Possible scenario with previous logic: | |
965 | * 1. Client hello indicates TLS 1.2 | |
966 | * 2. Server hello says TLS 1.0 | |
967 | * 3. RSA encrypted premaster secret uses 1.2. | |
968 | * 4. Handhaked proceeds using TLS 1.0. | |
969 | * 5. Server sends hello request to renegotiate. | |
970 | * 6. Client hello indicates TLS v1.0 as we now | |
971 | * know that is maximum server supports. | |
972 | * 7. Server chokes on RSA encrypted premaster secret | |
973 | * containing version 1.0. | |
974 | * | |
975 | * For interoperability it should be OK to always use the | |
976 | * maximum version we support in client hello and then rely | |
977 | * on the checking of version to ensure the servers isn't | |
978 | * being inconsistent: for example initially negotiating with | |
979 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
980 | * client_version in client hello and not resetting it to | |
981 | * the negotiated version. | |
982 | */ | |
983 | *(p++) = s->client_version >> 8; | |
984 | *(p++) = s->client_version & 0xff; | |
985 | ||
986 | /* Random stuff */ | |
987 | memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); | |
988 | p += SSL3_RANDOM_SIZE; | |
989 | ||
990 | /* Session ID */ | |
991 | if (s->new_session) | |
992 | i = 0; | |
993 | else | |
994 | i = s->session->session_id_length; | |
995 | *(p++) = i; | |
996 | if (i != 0) { | |
997 | if (i > (int)sizeof(s->session->session_id)) { | |
998 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
999 | goto err; | |
0f113f3e | 1000 | } |
b9908bf9 MC |
1001 | memcpy(p, s->session->session_id, i); |
1002 | p += i; | |
1003 | } | |
0f113f3e | 1004 | |
b9908bf9 MC |
1005 | /* cookie stuff for DTLS */ |
1006 | if (SSL_IS_DTLS(s)) { | |
1007 | if (s->d1->cookie_len > sizeof(s->d1->cookie)) { | |
1008 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
1009 | goto err; |
1010 | } | |
b9908bf9 MC |
1011 | *(p++) = s->d1->cookie_len; |
1012 | memcpy(p, s->d1->cookie, s->d1->cookie_len); | |
1013 | p += s->d1->cookie_len; | |
1014 | } | |
1015 | ||
1016 | /* Ciphers supported */ | |
1017 | i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2])); | |
1018 | if (i == 0) { | |
1019 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); | |
1020 | goto err; | |
1021 | } | |
800e1cd9 | 1022 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
b9908bf9 MC |
1023 | /* |
1024 | * Some servers hang if client hello > 256 bytes as hack workaround | |
1025 | * chop number of supported ciphers to keep it well below this if we | |
1026 | * use TLS v1.2 | |
1027 | */ | |
1028 | if (TLS1_get_version(s) >= TLS1_2_VERSION | |
1029 | && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) | |
1030 | i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
0f113f3e | 1031 | #endif |
b9908bf9 MC |
1032 | s2n(i, p); |
1033 | p += i; | |
0f113f3e | 1034 | |
b9908bf9 | 1035 | /* COMPRESSION */ |
09b6c2ef | 1036 | #ifdef OPENSSL_NO_COMP |
b9908bf9 | 1037 | *(p++) = 1; |
09b6c2ef | 1038 | #else |
566dda07 | 1039 | |
b9908bf9 MC |
1040 | if (!ssl_allow_compression(s) || !s->ctx->comp_methods) |
1041 | j = 0; | |
1042 | else | |
1043 | j = sk_SSL_COMP_num(s->ctx->comp_methods); | |
1044 | *(p++) = 1 + j; | |
1045 | for (i = 0; i < j; i++) { | |
1046 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
1047 | *(p++) = comp->id; | |
1048 | } | |
09b6c2ef | 1049 | #endif |
b9908bf9 | 1050 | *(p++) = 0; /* Add the NULL method */ |
761772d7 | 1051 | |
b9908bf9 MC |
1052 | /* TLS extensions */ |
1053 | if (ssl_prepare_clienthello_tlsext(s) <= 0) { | |
1054 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); | |
1055 | goto err; | |
1056 | } | |
1057 | if ((p = | |
1058 | ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH, | |
1059 | &al)) == NULL) { | |
1060 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1061 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
1062 | goto err; | |
1063 | } | |
0f113f3e | 1064 | |
b9908bf9 MC |
1065 | l = p - d; |
1066 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) { | |
1067 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
1068 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
1069 | goto err; | |
0f113f3e MC |
1070 | } |
1071 | ||
b9908bf9 | 1072 | return 1; |
0f113f3e | 1073 | err: |
fe3a3291 | 1074 | ossl_statem_set_error(s); |
b9908bf9 | 1075 | return 0; |
0f113f3e | 1076 | } |
d02b48c6 | 1077 | |
be3583fa | 1078 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 MC |
1079 | { |
1080 | int al; | |
1081 | unsigned int cookie_len; | |
1082 | PACKET cookiepkt; | |
1083 | ||
1084 | if (!PACKET_forward(pkt, 2) | |
1085 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { | |
1086 | al = SSL_AD_DECODE_ERROR; | |
1087 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1088 | goto f_err; | |
1089 | } | |
1090 | ||
1091 | cookie_len = PACKET_remaining(&cookiepkt); | |
1092 | if (cookie_len > sizeof(s->d1->cookie)) { | |
1093 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1094 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG); | |
1095 | goto f_err; | |
1096 | } | |
1097 | ||
1098 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
1099 | al = SSL_AD_DECODE_ERROR; | |
1100 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1101 | goto f_err; | |
1102 | } | |
1103 | s->d1->cookie_len = cookie_len; | |
1104 | ||
1105 | return MSG_PROCESS_FINISHED_READING; | |
1106 | f_err: | |
1107 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1108 | ossl_statem_set_error(s); |
8ba708e5 MC |
1109 | return MSG_PROCESS_ERROR; |
1110 | } | |
1111 | ||
be3583fa | 1112 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1113 | { |
1114 | STACK_OF(SSL_CIPHER) *sk; | |
1115 | const SSL_CIPHER *c; | |
73999b62 | 1116 | PACKET session_id; |
b9908bf9 MC |
1117 | size_t session_id_len; |
1118 | unsigned char *cipherchars; | |
1119 | int i, al = SSL_AD_INTERNAL_ERROR; | |
1120 | unsigned int compression; | |
1121 | #ifndef OPENSSL_NO_COMP | |
1122 | SSL_COMP *comp; | |
1123 | #endif | |
1124 | ||
13c9bb3e | 1125 | if (s->method->version == TLS_ANY_VERSION) { |
50932c4a MC |
1126 | unsigned int sversion; |
1127 | ||
73999b62 | 1128 | if (!PACKET_get_net_2(pkt, &sversion)) { |
50932c4a | 1129 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1130 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1131 | goto f_err; |
1132 | } | |
13c9bb3e MC |
1133 | |
1134 | #if TLS_MAX_VERSION != TLS1_2_VERSION | |
1135 | #error Code needs updating for new TLS version | |
1136 | #endif | |
1137 | #ifndef OPENSSL_NO_SSL3 | |
1138 | if ((sversion == SSL3_VERSION) && !(s->options & SSL_OP_NO_SSLv3)) { | |
1139 | if (FIPS_mode()) { | |
b9908bf9 | 1140 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
13c9bb3e | 1141 | SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); |
d45ba43d MC |
1142 | al = SSL_AD_PROTOCOL_VERSION; |
1143 | goto f_err; | |
13c9bb3e MC |
1144 | } |
1145 | s->method = SSLv3_client_method(); | |
1146 | } else | |
1147 | #endif | |
1148 | if ((sversion == TLS1_VERSION) && !(s->options & SSL_OP_NO_TLSv1)) { | |
1149 | s->method = TLSv1_client_method(); | |
1150 | } else if ((sversion == TLS1_1_VERSION) && | |
1151 | !(s->options & SSL_OP_NO_TLSv1_1)) { | |
1152 | s->method = TLSv1_1_client_method(); | |
1153 | } else if ((sversion == TLS1_2_VERSION) && | |
1154 | !(s->options & SSL_OP_NO_TLSv1_2)) { | |
1155 | s->method = TLSv1_2_client_method(); | |
1156 | } else { | |
b9908bf9 | 1157 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); |
d45ba43d MC |
1158 | al = SSL_AD_PROTOCOL_VERSION; |
1159 | goto f_err; | |
13c9bb3e MC |
1160 | } |
1161 | s->session->ssl_version = s->version = s->method->version; | |
1162 | ||
1163 | if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) { | |
b9908bf9 | 1164 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_VERSION_TOO_LOW); |
d45ba43d MC |
1165 | al = SSL_AD_PROTOCOL_VERSION; |
1166 | goto f_err; | |
13c9bb3e MC |
1167 | } |
1168 | } else if (s->method->version == DTLS_ANY_VERSION) { | |
0f113f3e | 1169 | /* Work out correct protocol version to use */ |
50932c4a MC |
1170 | unsigned int hversion; |
1171 | int options; | |
1172 | ||
73999b62 | 1173 | if (!PACKET_get_net_2(pkt, &hversion)) { |
50932c4a | 1174 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1175 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1176 | goto f_err; |
1177 | } | |
1178 | ||
1179 | options = s->options; | |
0f113f3e MC |
1180 | if (hversion == DTLS1_2_VERSION && !(options & SSL_OP_NO_DTLSv1_2)) |
1181 | s->method = DTLSv1_2_client_method(); | |
1182 | else if (tls1_suiteb(s)) { | |
b9908bf9 | 1183 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1184 | SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE); |
1185 | s->version = hversion; | |
1186 | al = SSL_AD_PROTOCOL_VERSION; | |
1187 | goto f_err; | |
1188 | } else if (hversion == DTLS1_VERSION && !(options & SSL_OP_NO_DTLSv1)) | |
1189 | s->method = DTLSv1_client_method(); | |
1190 | else { | |
b9908bf9 | 1191 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); |
0f113f3e MC |
1192 | s->version = hversion; |
1193 | al = SSL_AD_PROTOCOL_VERSION; | |
1194 | goto f_err; | |
1195 | } | |
7322abf5 | 1196 | s->session->ssl_version = s->version = s->method->version; |
50932c4a MC |
1197 | } else { |
1198 | unsigned char *vers; | |
1199 | ||
73999b62 | 1200 | if (!PACKET_get_bytes(pkt, &vers, 2)) { |
50932c4a | 1201 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1202 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1203 | goto f_err; |
1204 | } | |
1205 | if ((vers[0] != (s->version >> 8)) | |
1206 | || (vers[1] != (s->version & 0xff))) { | |
b9908bf9 | 1207 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); |
50932c4a MC |
1208 | s->version = (s->version & 0xff00) | vers[1]; |
1209 | al = SSL_AD_PROTOCOL_VERSION; | |
1210 | goto f_err; | |
1211 | } | |
0f113f3e | 1212 | } |
0f113f3e MC |
1213 | |
1214 | /* load the server hello data */ | |
1215 | /* load the server random */ | |
73999b62 | 1216 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { |
50932c4a | 1217 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1218 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1219 | goto f_err; |
1220 | } | |
0f113f3e MC |
1221 | |
1222 | s->hit = 0; | |
1223 | ||
fc5ce51d | 1224 | /* Get the session-id. */ |
73999b62 | 1225 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { |
fc5ce51d | 1226 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 1227 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1228 | goto f_err; |
1229 | } | |
1230 | session_id_len = PACKET_remaining(&session_id); | |
1231 | if (session_id_len > sizeof s->session->session_id | |
1232 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
0f113f3e | 1233 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1234 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG); |
0f113f3e MC |
1235 | goto f_err; |
1236 | } | |
e481f9b9 | 1237 | |
73999b62 | 1238 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f0659bdb | 1239 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1240 | al = SSL_AD_DECODE_ERROR; |
1241 | goto f_err; | |
1242 | } | |
1243 | ||
0f113f3e | 1244 | /* |
6e3d0153 EK |
1245 | * Check if we can resume the session based on external pre-shared secret. |
1246 | * EAP-FAST (RFC 4851) supports two types of session resumption. | |
1247 | * Resumption based on server-side state works with session IDs. | |
1248 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1249 | * works by overriding the SessionTicket extension at the application | |
1250 | * layer, and does not send a session ID. (We do not know whether EAP-FAST | |
1251 | * servers would honour the session ID.) Therefore, the session ID alone | |
1252 | * is not a reliable indicator of session resumption, so we first check if | |
1253 | * we can resume, and later peek at the next handshake message to see if the | |
1254 | * server wants to resume. | |
0f113f3e | 1255 | */ |
6e3d0153 EK |
1256 | if (s->version >= TLS1_VERSION && s->tls_session_secret_cb && |
1257 | s->session->tlsext_tick) { | |
0f113f3e MC |
1258 | SSL_CIPHER *pref_cipher = NULL; |
1259 | s->session->master_key_length = sizeof(s->session->master_key); | |
1260 | if (s->tls_session_secret_cb(s, s->session->master_key, | |
1261 | &s->session->master_key_length, | |
1262 | NULL, &pref_cipher, | |
1263 | s->tls_session_secret_cb_arg)) { | |
1264 | s->session->cipher = pref_cipher ? | |
50932c4a | 1265 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars); |
6e3d0153 | 1266 | } else { |
b9908bf9 | 1267 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); |
6e3d0153 EK |
1268 | al = SSL_AD_INTERNAL_ERROR; |
1269 | goto f_err; | |
0f113f3e | 1270 | } |
50932c4a MC |
1271 | } |
1272 | ||
fc5ce51d EK |
1273 | if (session_id_len != 0 && session_id_len == s->session->session_id_length |
1274 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1275 | session_id_len) == 0) { | |
0f113f3e MC |
1276 | if (s->sid_ctx_length != s->session->sid_ctx_length |
1277 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { | |
1278 | /* actually a client application bug */ | |
1279 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1280 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1281 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1282 | goto f_err; | |
1283 | } | |
1284 | s->hit = 1; | |
6e3d0153 | 1285 | } else { |
0f113f3e | 1286 | /* |
6e3d0153 EK |
1287 | * If we were trying for session-id reuse but the server |
1288 | * didn't echo the ID, make a new SSL_SESSION. | |
1289 | * In the case of EAP-FAST and PAC, we do not send a session ID, | |
1290 | * so the PAC-based session secret is always preserved. It'll be | |
1291 | * overwritten if the server refuses resumption. | |
0f113f3e MC |
1292 | */ |
1293 | if (s->session->session_id_length > 0) { | |
1294 | if (!ssl_get_new_session(s, 0)) { | |
1295 | goto f_err; | |
1296 | } | |
1297 | } | |
50932c4a | 1298 | |
fc5ce51d EK |
1299 | s->session->session_id_length = session_id_len; |
1300 | /* session_id_len could be 0 */ | |
1301 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1302 | session_id_len); | |
0f113f3e | 1303 | } |
fc5ce51d | 1304 | |
50932c4a | 1305 | c = ssl_get_cipher_by_char(s, cipherchars); |
0f113f3e MC |
1306 | if (c == NULL) { |
1307 | /* unknown cipher */ | |
1308 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1309 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); |
0f113f3e MC |
1310 | goto f_err; |
1311 | } | |
1312 | /* Set version disabled mask now we know version */ | |
1313 | if (!SSL_USE_TLS1_2_CIPHERS(s)) | |
4d69f9e6 | 1314 | s->s3->tmp.mask_ssl = SSL_TLSV1_2; |
0f113f3e | 1315 | else |
4d69f9e6 | 1316 | s->s3->tmp.mask_ssl = 0; |
2b573382 DSH |
1317 | /* Skip TLS v1.0 ciphersuites if SSLv3 */ |
1318 | if ((c->algorithm_ssl & SSL_TLSV1) && s->version == SSL3_VERSION) | |
1319 | s->s3->tmp.mask_ssl |= SSL_TLSV1; | |
0f113f3e MC |
1320 | /* |
1321 | * If it is a disabled cipher we didn't send it in client hello, so | |
1322 | * return an error. | |
1323 | */ | |
1324 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
1325 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1326 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1327 | goto f_err; |
1328 | } | |
0f113f3e MC |
1329 | |
1330 | sk = ssl_get_ciphers_by_id(s); | |
1331 | i = sk_SSL_CIPHER_find(sk, c); | |
1332 | if (i < 0) { | |
1333 | /* we did not say we would use this cipher */ | |
1334 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1335 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1336 | goto f_err; |
1337 | } | |
1338 | ||
1339 | /* | |
1340 | * Depending on the session caching (internal/external), the cipher | |
1341 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1342 | * set and use it for comparison. | |
1343 | */ | |
1344 | if (s->session->cipher) | |
1345 | s->session->cipher_id = s->session->cipher->id; | |
1346 | if (s->hit && (s->session->cipher_id != c->id)) { | |
9e9858d1 | 1347 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1348 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
9e9858d1 RS |
1349 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
1350 | goto f_err; | |
0f113f3e MC |
1351 | } |
1352 | s->s3->tmp.new_cipher = c; | |
0f113f3e MC |
1353 | /* lets get the compression algorithm */ |
1354 | /* COMPRESSION */ | |
73999b62 | 1355 | if (!PACKET_get_1(pkt, &compression)) { |
f0659bdb | 1356 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1357 | al = SSL_AD_DECODE_ERROR; |
1358 | goto f_err; | |
1359 | } | |
09b6c2ef | 1360 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1361 | if (compression != 0) { |
0f113f3e | 1362 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1363 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1364 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1365 | goto f_err; | |
1366 | } | |
1367 | /* | |
1368 | * If compression is disabled we'd better not try to resume a session | |
1369 | * using compression. | |
1370 | */ | |
1371 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 1372 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
1373 | goto f_err; |
1374 | } | |
09b6c2ef | 1375 | #else |
fc5ce51d | 1376 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 1377 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1378 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1379 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
1380 | goto f_err; | |
1381 | } | |
fc5ce51d | 1382 | if (compression == 0) |
0f113f3e MC |
1383 | comp = NULL; |
1384 | else if (!ssl_allow_compression(s)) { | |
1385 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1386 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 1387 | goto f_err; |
fc5ce51d EK |
1388 | } else { |
1389 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1390 | } | |
0f113f3e | 1391 | |
fc5ce51d | 1392 | if (compression != 0 && comp == NULL) { |
0f113f3e | 1393 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1394 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1395 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1396 | goto f_err; | |
1397 | } else { | |
1398 | s->s3->tmp.new_compression = comp; | |
1399 | } | |
09b6c2ef | 1400 | #endif |
761772d7 | 1401 | |
0f113f3e | 1402 | /* TLS extensions */ |
73999b62 | 1403 | if (!ssl_parse_serverhello_tlsext(s, pkt)) { |
b9908bf9 | 1404 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT); |
0f113f3e MC |
1405 | goto err; |
1406 | } | |
0f113f3e | 1407 | |
73999b62 | 1408 | if (PACKET_remaining(pkt) != 0) { |
0f113f3e MC |
1409 | /* wrong packet length */ |
1410 | al = SSL_AD_DECODE_ERROR; | |
b9908bf9 | 1411 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH); |
0f113f3e MC |
1412 | goto f_err; |
1413 | } | |
1414 | ||
8723588e MC |
1415 | #ifndef OPENSSL_NO_SCTP |
1416 | if (SSL_IS_DTLS(s) && s->hit) { | |
1417 | unsigned char sctpauthkey[64]; | |
1418 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1419 | ||
1420 | /* | |
1421 | * Add new shared key for SCTP-Auth, will be ignored if | |
1422 | * no SCTP used. | |
1423 | */ | |
141eb8c6 MC |
1424 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1425 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1426 | |
1427 | if (SSL_export_keying_material(s, sctpauthkey, | |
1428 | sizeof(sctpauthkey), | |
1429 | labelbuffer, | |
1430 | sizeof(labelbuffer), NULL, 0, | |
1431 | 0) <= 0) | |
1432 | goto err; | |
1433 | ||
1434 | BIO_ctrl(SSL_get_wbio(s), | |
1435 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1436 | sizeof(sctpauthkey), sctpauthkey); | |
1437 | } | |
1438 | #endif | |
1439 | ||
b9908bf9 | 1440 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1441 | f_err: |
1442 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1443 | err: | |
fe3a3291 | 1444 | ossl_statem_set_error(s); |
b9908bf9 | 1445 | return MSG_PROCESS_ERROR; |
0f113f3e | 1446 | } |
d02b48c6 | 1447 | |
be3583fa | 1448 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1449 | { |
1450 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
1451 | unsigned long cert_list_len, cert_len; | |
1452 | X509 *x = NULL; | |
1453 | unsigned char *certstart, *certbytes; | |
1454 | STACK_OF(X509) *sk = NULL; | |
1455 | EVP_PKEY *pkey = NULL; | |
0f113f3e MC |
1456 | |
1457 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1458 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1459 | goto err; |
0f113f3e MC |
1460 | } |
1461 | ||
73999b62 MC |
1462 | if (!PACKET_get_net_3(pkt, &cert_list_len) |
1463 | || PACKET_remaining(pkt) != cert_list_len) { | |
0f113f3e | 1464 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1465 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1466 | goto f_err; |
1467 | } | |
73999b62 MC |
1468 | while (PACKET_remaining(pkt)) { |
1469 | if (!PACKET_get_net_3(pkt, &cert_len) | |
1470 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { | |
0f113f3e | 1471 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1472 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1473 | SSL_R_CERT_LENGTH_MISMATCH); |
1474 | goto f_err; | |
1475 | } | |
1476 | ||
df758a85 MC |
1477 | certstart = certbytes; |
1478 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1479 | if (x == NULL) { |
1480 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1481 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1482 | goto f_err; |
1483 | } | |
df758a85 | 1484 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1485 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1486 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1487 | SSL_R_CERT_LENGTH_MISMATCH); |
1488 | goto f_err; | |
1489 | } | |
1490 | if (!sk_X509_push(sk, x)) { | |
b9908bf9 | 1491 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1492 | goto err; |
0f113f3e MC |
1493 | } |
1494 | x = NULL; | |
0f113f3e MC |
1495 | } |
1496 | ||
1497 | i = ssl_verify_cert_chain(s, sk); | |
55a9a16f | 1498 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { |
0f113f3e | 1499 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1500 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1501 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1502 | goto f_err; | |
1503 | } | |
1504 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1505 | if (i > 1) { | |
b9908bf9 | 1506 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1507 | al = SSL_AD_HANDSHAKE_FAILURE; |
1508 | goto f_err; | |
1509 | } | |
1510 | ||
c34b0f99 | 1511 | s->session->peer_chain = sk; |
0f113f3e MC |
1512 | /* |
1513 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
1514 | * which we don't include in s3_srvr.c | |
1515 | */ | |
1516 | x = sk_X509_value(sk, 0); | |
1517 | sk = NULL; | |
1518 | /* | |
1519 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1520 | */ | |
1521 | ||
1522 | pkey = X509_get_pubkey(x); | |
1523 | ||
55a9a16f | 1524 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
1525 | x = NULL; |
1526 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1527 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1528 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1529 | goto f_err; | |
1530 | } | |
1531 | ||
1532 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1533 | if (i < 0) { |
0f113f3e MC |
1534 | x = NULL; |
1535 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1536 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1537 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1538 | goto f_err; | |
1539 | } | |
1540 | ||
55a9a16f | 1541 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); |
e44380a9 DB |
1542 | if (exp_idx >= 0 && i != exp_idx |
1543 | && (exp_idx != SSL_PKEY_GOST_EC || | |
1544 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256 | |
1545 | && i != SSL_PKEY_GOST01))) { | |
55a9a16f MC |
1546 | x = NULL; |
1547 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1548 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
55a9a16f MC |
1549 | SSL_R_WRONG_CERTIFICATE_TYPE); |
1550 | goto f_err; | |
0f113f3e | 1551 | } |
a273c6ee | 1552 | s->session->peer_type = i; |
55a9a16f MC |
1553 | |
1554 | X509_free(s->session->peer); | |
05f0fb9f | 1555 | X509_up_ref(x); |
55a9a16f | 1556 | s->session->peer = x; |
0f113f3e MC |
1557 | s->session->verify_result = s->verify_result; |
1558 | ||
1559 | x = NULL; | |
b9908bf9 | 1560 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1561 | goto done; |
1562 | ||
0f113f3e | 1563 | f_err: |
66696478 | 1564 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1565 | err: |
fe3a3291 | 1566 | ossl_statem_set_error(s); |
66696478 | 1567 | done: |
0f113f3e MC |
1568 | EVP_PKEY_free(pkey); |
1569 | X509_free(x); | |
1570 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1571 | return ret; |
0f113f3e | 1572 | } |
d02b48c6 | 1573 | |
be3583fa | 1574 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 1575 | { |
6e59a892 | 1576 | EVP_MD_CTX *md_ctx; |
192e4bbb | 1577 | int al, j; |
b9908bf9 MC |
1578 | long alg_k, alg_a; |
1579 | EVP_PKEY *pkey = NULL; | |
1580 | const EVP_MD *md = NULL; | |
1581 | #ifndef OPENSSL_NO_RSA | |
1582 | RSA *rsa = NULL; | |
1583 | #endif | |
1584 | #ifndef OPENSSL_NO_DH | |
1585 | DH *dh = NULL; | |
1586 | #endif | |
1587 | #ifndef OPENSSL_NO_EC | |
1588 | EC_KEY *ecdh = NULL; | |
b9908bf9 MC |
1589 | int curve_nid = 0; |
1590 | #endif | |
73999b62 | 1591 | PACKET save_param_start, signature; |
b9908bf9 | 1592 | |
bfb0641f | 1593 | md_ctx = EVP_MD_CTX_new(); |
6e59a892 RL |
1594 | if (md_ctx == NULL) { |
1595 | al = SSL_AD_INTERNAL_ERROR; | |
1596 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
1597 | goto f_err; | |
1598 | } | |
b9908bf9 MC |
1599 | |
1600 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
1601 | ||
73999b62 | 1602 | save_param_start = *pkt; |
8d92c1f8 | 1603 | |
bc36ee62 | 1604 | #ifndef OPENSSL_NO_DH |
8d92c1f8 DSH |
1605 | DH_free(s->s3->peer_dh_tmp); |
1606 | s->s3->peer_dh_tmp = NULL; | |
ea262260 | 1607 | #endif |
10bf4fc2 | 1608 | #ifndef OPENSSL_NO_EC |
8d92c1f8 DSH |
1609 | EC_KEY_free(s->s3->peer_ecdh_tmp); |
1610 | s->s3->peer_ecdh_tmp = NULL; | |
d02b48c6 | 1611 | #endif |
8d92c1f8 | 1612 | |
0f113f3e | 1613 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; |
d02b48c6 | 1614 | |
0f113f3e | 1615 | al = SSL_AD_DECODE_ERROR; |
f2be92b9 | 1616 | |
ddac1974 | 1617 | #ifndef OPENSSL_NO_PSK |
7689082b DSH |
1618 | /* PSK ciphersuites are preceded by an identity hint */ |
1619 | if (alg_k & SSL_PSK) { | |
32942870 | 1620 | PACKET psk_identity_hint; |
73999b62 | 1621 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { |
f0659bdb | 1622 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1623 | goto f_err; |
1624 | } | |
0f113f3e MC |
1625 | |
1626 | /* | |
1627 | * Store PSK identity hint for later use, hint is used in | |
1628 | * ssl3_send_client_key_exchange. Assume that the maximum length of | |
1629 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1630 | * identity. | |
1631 | */ | |
32942870 | 1632 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { |
0f113f3e | 1633 | al = SSL_AD_HANDSHAKE_FAILURE; |
b9908bf9 | 1634 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG); |
0f113f3e MC |
1635 | goto f_err; |
1636 | } | |
8098fc56 | 1637 | |
558ceae7 DSH |
1638 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1639 | OPENSSL_free(s->session->psk_identity_hint); | |
1640 | s->session->psk_identity_hint = NULL; | |
1641 | } else if (!PACKET_strndup(&psk_identity_hint, | |
32942870 EK |
1642 | &s->session->psk_identity_hint)) { |
1643 | al = SSL_AD_INTERNAL_ERROR; | |
1644 | goto f_err; | |
0f113f3e | 1645 | } |
7689082b DSH |
1646 | } |
1647 | ||
1648 | /* Nothing else to do for plain PSK or RSAPSK */ | |
1649 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
0f113f3e MC |
1650 | } else |
1651 | #endif /* !OPENSSL_NO_PSK */ | |
bbf431cb MC |
1652 | /* |
1653 | * Dummy "if" to ensure sane C code in the event of various OPENSSL_NO_* | |
1654 | * options | |
1655 | */ | |
1656 | if (0) { | |
1657 | } | |
edc032b5 | 1658 | #ifndef OPENSSL_NO_SRP |
bbf431cb | 1659 | else if (alg_k & SSL_kSRP) { |
32942870 | 1660 | PACKET prime, generator, salt, server_pub; |
73999b62 MC |
1661 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1662 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1663 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1664 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
f0659bdb | 1665 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1666 | goto f_err; |
1667 | } | |
0f113f3e | 1668 | |
32942870 EK |
1669 | if ((s->srp_ctx.N = |
1670 | BN_bin2bn(PACKET_data(&prime), | |
1671 | PACKET_remaining(&prime), NULL)) == NULL | |
1672 | || (s->srp_ctx.g = | |
1673 | BN_bin2bn(PACKET_data(&generator), | |
1674 | PACKET_remaining(&generator), NULL)) == NULL | |
1675 | || (s->srp_ctx.s = | |
1676 | BN_bin2bn(PACKET_data(&salt), | |
1677 | PACKET_remaining(&salt), NULL)) == NULL | |
1678 | || (s->srp_ctx.B = | |
1679 | BN_bin2bn(PACKET_data(&server_pub), | |
1680 | PACKET_remaining(&server_pub), NULL)) == NULL) { | |
f0659bdb | 1681 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB); |
0f113f3e MC |
1682 | goto err; |
1683 | } | |
0f113f3e MC |
1684 | |
1685 | if (!srp_verify_server_param(s, &al)) { | |
b9908bf9 | 1686 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS); |
0f113f3e MC |
1687 | goto f_err; |
1688 | } | |
0989790b | 1689 | |
edc032b5 | 1690 | /* We must check if there is a certificate */ |
8df53b7a | 1691 | if (alg_a & (SSL_aRSA|SSL_aDSS)) |
a273c6ee | 1692 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e | 1693 | } |
361a1191 | 1694 | #endif /* !OPENSSL_NO_SRP */ |
bc36ee62 | 1695 | #ifndef OPENSSL_NO_DH |
7689082b | 1696 | else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
32942870 | 1697 | PACKET prime, generator, pub_key; |
0f113f3e | 1698 | |
73999b62 MC |
1699 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1700 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1701 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
f0659bdb | 1702 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1703 | goto f_err; |
1704 | } | |
0f113f3e | 1705 | |
32942870 | 1706 | if ((dh = DH_new()) == NULL) { |
f0659bdb | 1707 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_DH_LIB); |
0f113f3e MC |
1708 | goto err; |
1709 | } | |
0f113f3e | 1710 | |
32942870 EK |
1711 | if ((dh->p = BN_bin2bn(PACKET_data(&prime), |
1712 | PACKET_remaining(&prime), NULL)) == NULL | |
1713 | || (dh->g = BN_bin2bn(PACKET_data(&generator), | |
1714 | PACKET_remaining(&generator), NULL)) == NULL | |
1715 | || (dh->pub_key = | |
1716 | BN_bin2bn(PACKET_data(&pub_key), | |
1717 | PACKET_remaining(&pub_key), NULL)) == NULL) { | |
f0659bdb | 1718 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB); |
0f113f3e MC |
1719 | goto err; |
1720 | } | |
0f113f3e | 1721 | |
32942870 | 1722 | if (BN_is_zero(dh->p) || BN_is_zero(dh->g) || BN_is_zero(dh->pub_key)) { |
f0659bdb | 1723 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_DH_VALUE); |
61e72d76 GL |
1724 | goto f_err; |
1725 | } | |
1726 | ||
0f113f3e MC |
1727 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { |
1728 | al = SSL_AD_HANDSHAKE_FAILURE; | |
b9908bf9 | 1729 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL); |
0f113f3e MC |
1730 | goto f_err; |
1731 | } | |
8df53b7a | 1732 | if (alg_a & (SSL_aRSA|SSL_aDSS)) |
a273c6ee | 1733 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e MC |
1734 | /* else anonymous DH, so no certificate or pkey. */ |
1735 | ||
8d92c1f8 | 1736 | s->s3->peer_dh_tmp = dh; |
0f113f3e | 1737 | dh = NULL; |
0f113f3e MC |
1738 | } |
1739 | #endif /* !OPENSSL_NO_DH */ | |
ea262260 | 1740 | |
10bf4fc2 | 1741 | #ifndef OPENSSL_NO_EC |
7689082b | 1742 | else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
32942870 EK |
1743 | PACKET encoded_pt; |
1744 | unsigned char *ecparams; | |
0f113f3e | 1745 | |
0f113f3e MC |
1746 | /* |
1747 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
32942870 | 1748 | * public key. For now we only support named (not generic) curves and |
8098fc56 | 1749 | * ECParameters in this case is just three bytes. |
0f113f3e | 1750 | */ |
73999b62 | 1751 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { |
f0659bdb | 1752 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
0f113f3e MC |
1753 | goto f_err; |
1754 | } | |
1755 | /* | |
1756 | * Check curve is one of our preferences, if not server has sent an | |
1757 | * invalid curve. ECParameters is 3 bytes. | |
1758 | */ | |
32942870 | 1759 | if (!tls1_check_curve(s, ecparams, 3)) { |
f0659bdb | 1760 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_CURVE); |
0f113f3e MC |
1761 | goto f_err; |
1762 | } | |
1763 | ||
32942870 | 1764 | if ((curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2))) == 0) { |
0f113f3e | 1765 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1766 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
0f113f3e MC |
1767 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
1768 | goto f_err; | |
1769 | } | |
1770 | ||
cae41364 | 1771 | ecdh = EC_KEY_new_by_curve_name(curve_nid); |
0f113f3e | 1772 | |
cae41364 DSH |
1773 | if (ecdh == NULL) { |
1774 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EC_LIB); | |
0f113f3e MC |
1775 | goto err; |
1776 | } | |
1777 | ||
73999b62 | 1778 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { |
f0659bdb | 1779 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
8098fc56 MC |
1780 | goto f_err; |
1781 | } | |
0f113f3e | 1782 | |
cae41364 DSH |
1783 | if (EC_KEY_oct2key(ecdh, PACKET_data(&encoded_pt), |
1784 | PACKET_remaining(&encoded_pt), NULL) == 0) { | |
f0659bdb | 1785 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_ECPOINT); |
0f113f3e MC |
1786 | goto f_err; |
1787 | } | |
0f113f3e MC |
1788 | |
1789 | /* | |
1790 | * The ECC/TLS specification does not mention the use of DSA to sign | |
1791 | * ECParameters in the server key exchange message. We do support RSA | |
1792 | * and ECDSA. | |
1793 | */ | |
1794 | if (0) ; | |
1795 | # ifndef OPENSSL_NO_RSA | |
1796 | else if (alg_a & SSL_aRSA) | |
a273c6ee | 1797 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e | 1798 | # endif |
10bf4fc2 | 1799 | # ifndef OPENSSL_NO_EC |
0f113f3e | 1800 | else if (alg_a & SSL_aECDSA) |
a273c6ee | 1801 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e MC |
1802 | # endif |
1803 | /* else anonymous ECDH, so no certificate or pkey. */ | |
8d92c1f8 | 1804 | s->s3->peer_ecdh_tmp = ecdh; |
0f113f3e | 1805 | ecdh = NULL; |
0f113f3e MC |
1806 | } else if (alg_k) { |
1807 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 1808 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
0f113f3e MC |
1809 | goto f_err; |
1810 | } | |
10bf4fc2 | 1811 | #endif /* !OPENSSL_NO_EC */ |
0f113f3e | 1812 | |
0f113f3e MC |
1813 | /* if it was signed, check the signature */ |
1814 | if (pkey != NULL) { | |
32942870 EK |
1815 | PACKET params; |
1816 | /* | |
1817 | * |pkt| now points to the beginning of the signature, so the difference | |
1818 | * equals the length of the parameters. | |
1819 | */ | |
1820 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
1821 | PACKET_remaining(&save_param_start) - | |
73999b62 | 1822 | PACKET_remaining(pkt))) { |
32942870 | 1823 | al = SSL_AD_INTERNAL_ERROR; |
f0659bdb | 1824 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
32942870 EK |
1825 | goto f_err; |
1826 | } | |
1827 | ||
0f113f3e | 1828 | if (SSL_USE_SIGALGS(s)) { |
32942870 | 1829 | unsigned char *sigalgs; |
0f113f3e | 1830 | int rv; |
73999b62 | 1831 | if (!PACKET_get_bytes(pkt, &sigalgs, 2)) { |
f0659bdb | 1832 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
0f113f3e MC |
1833 | goto f_err; |
1834 | } | |
32942870 | 1835 | rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey); |
0f113f3e MC |
1836 | if (rv == -1) |
1837 | goto err; | |
1838 | else if (rv == 0) { | |
1839 | goto f_err; | |
1840 | } | |
a2f9200f | 1841 | #ifdef SSL_DEBUG |
0f113f3e MC |
1842 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
1843 | #endif | |
192e4bbb DSH |
1844 | } else if (pkey->type == EVP_PKEY_RSA) { |
1845 | md = EVP_md5_sha1(); | |
32942870 | 1846 | } else { |
0f113f3e | 1847 | md = EVP_sha1(); |
32942870 | 1848 | } |
0f113f3e | 1849 | |
73999b62 MC |
1850 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
1851 | || PACKET_remaining(pkt) != 0) { | |
f0659bdb | 1852 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1853 | goto f_err; |
1854 | } | |
0f113f3e | 1855 | j = EVP_PKEY_size(pkey); |
8098fc56 | 1856 | if (j < 0) { |
b9908bf9 | 1857 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
8098fc56 MC |
1858 | goto f_err; |
1859 | } | |
0f113f3e MC |
1860 | |
1861 | /* | |
8098fc56 | 1862 | * Check signature length |
0f113f3e | 1863 | */ |
32942870 | 1864 | if (PACKET_remaining(&signature) > (size_t)j) { |
0f113f3e | 1865 | /* wrong packet length */ |
b9908bf9 | 1866 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH); |
0f113f3e MC |
1867 | goto f_err; |
1868 | } | |
6e59a892 RL |
1869 | if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0 |
1870 | || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]), | |
192e4bbb | 1871 | SSL3_RANDOM_SIZE) <= 0 |
6e59a892 | 1872 | || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]), |
192e4bbb | 1873 | SSL3_RANDOM_SIZE) <= 0 |
6e59a892 | 1874 | || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms), |
192e4bbb DSH |
1875 | PACKET_remaining(¶ms)) <= 0) { |
1876 | al = SSL_AD_INTERNAL_ERROR; | |
1877 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
1878 | goto f_err; | |
1879 | } | |
6e59a892 | 1880 | if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature), |
192e4bbb DSH |
1881 | PACKET_remaining(&signature), pkey) <= 0) { |
1882 | /* bad signature */ | |
1883 | al = SSL_AD_DECRYPT_ERROR; | |
1884 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
1885 | goto f_err; | |
0f113f3e MC |
1886 | } |
1887 | } else { | |
7689082b DSH |
1888 | /* aNULL, aSRP or PSK do not need public keys */ |
1889 | if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_PSK)) { | |
0f113f3e MC |
1890 | /* Might be wrong key type, check it */ |
1891 | if (ssl3_check_cert_and_algorithm(s)) | |
1892 | /* Otherwise this shouldn't happen */ | |
b9908bf9 | 1893 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
0f113f3e MC |
1894 | goto err; |
1895 | } | |
1896 | /* still data left over */ | |
73999b62 | 1897 | if (PACKET_remaining(pkt) != 0) { |
b9908bf9 | 1898 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
0f113f3e MC |
1899 | goto f_err; |
1900 | } | |
1901 | } | |
1902 | EVP_PKEY_free(pkey); | |
bfb0641f | 1903 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 1904 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1905 | f_err: |
1906 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1907 | err: | |
1908 | EVP_PKEY_free(pkey); | |
bc36ee62 | 1909 | #ifndef OPENSSL_NO_RSA |
d6407083 | 1910 | RSA_free(rsa); |
6b521df3 | 1911 | #endif |
bc36ee62 | 1912 | #ifndef OPENSSL_NO_DH |
d6407083 | 1913 | DH_free(dh); |
ea262260 | 1914 | #endif |
10bf4fc2 | 1915 | #ifndef OPENSSL_NO_EC |
8fdc3734 | 1916 | EC_KEY_free(ecdh); |
6b521df3 | 1917 | #endif |
bfb0641f | 1918 | EVP_MD_CTX_free(md_ctx); |
fe3a3291 | 1919 | ossl_statem_set_error(s); |
b9908bf9 | 1920 | return MSG_PROCESS_ERROR; |
0f113f3e | 1921 | } |
d02b48c6 | 1922 | |
be3583fa | 1923 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1924 | { |
1925 | int ret = MSG_PROCESS_ERROR; | |
1926 | unsigned int list_len, ctype_num, i, name_len; | |
1927 | X509_NAME *xn = NULL; | |
1928 | unsigned char *data; | |
1929 | unsigned char *namestart, *namebytes; | |
1930 | STACK_OF(X509_NAME) *ca_sk = NULL; | |
0f113f3e MC |
1931 | |
1932 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { | |
b9908bf9 | 1933 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1934 | goto err; |
1935 | } | |
1936 | ||
1937 | /* get the certificate types */ | |
73999b62 MC |
1938 | if (!PACKET_get_1(pkt, &ctype_num) |
1939 | || !PACKET_get_bytes(pkt, &data, ctype_num)) { | |
ac112332 | 1940 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1941 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
ac112332 MC |
1942 | goto err; |
1943 | } | |
b548a1f1 RS |
1944 | OPENSSL_free(s->cert->ctypes); |
1945 | s->cert->ctypes = NULL; | |
0f113f3e MC |
1946 | if (ctype_num > SSL3_CT_NUMBER) { |
1947 | /* If we exceed static buffer copy all to cert structure */ | |
1948 | s->cert->ctypes = OPENSSL_malloc(ctype_num); | |
1949 | if (s->cert->ctypes == NULL) { | |
b9908bf9 | 1950 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1951 | goto err; |
1952 | } | |
ac112332 | 1953 | memcpy(s->cert->ctypes, data, ctype_num); |
0f113f3e MC |
1954 | s->cert->ctype_num = (size_t)ctype_num; |
1955 | ctype_num = SSL3_CT_NUMBER; | |
1956 | } | |
1957 | for (i = 0; i < ctype_num; i++) | |
ac112332 MC |
1958 | s->s3->tmp.ctype[i] = data[i]; |
1959 | ||
0f113f3e | 1960 | if (SSL_USE_SIGALGS(s)) { |
73999b62 MC |
1961 | if (!PACKET_get_net_2(pkt, &list_len) |
1962 | || !PACKET_get_bytes(pkt, &data, list_len)) { | |
0f113f3e | 1963 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
1964 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
1965 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
1966 | goto err; |
1967 | } | |
ac112332 | 1968 | |
0f113f3e MC |
1969 | /* Clear certificate digests and validity flags */ |
1970 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
d376e57d | 1971 | s->s3->tmp.md[i] = NULL; |
6383d316 | 1972 | s->s3->tmp.valid_flags[i] = 0; |
0f113f3e | 1973 | } |
ac112332 | 1974 | if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) { |
0f113f3e | 1975 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1976 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
1977 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
1978 | goto err; | |
1979 | } | |
1980 | if (!tls1_process_sigalgs(s)) { | |
1981 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 1982 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1983 | goto err; |
1984 | } | |
a0f63828 DSH |
1985 | } else { |
1986 | ssl_set_default_md(s); | |
0f113f3e MC |
1987 | } |
1988 | ||
1989 | /* get the CA RDNs */ | |
73999b62 MC |
1990 | if (!PACKET_get_net_2(pkt, &list_len) |
1991 | || PACKET_remaining(pkt) != list_len) { | |
0f113f3e | 1992 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1993 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1994 | goto err; |
1995 | } | |
1996 | ||
73999b62 MC |
1997 | while (PACKET_remaining(pkt)) { |
1998 | if (!PACKET_get_net_2(pkt, &name_len) | |
1999 | || !PACKET_get_bytes(pkt, &namebytes, name_len)) { | |
0f113f3e | 2000 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2001 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2002 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2003 | goto err; |
2004 | } | |
2005 | ||
ac112332 | 2006 | namestart = namebytes; |
0f113f3e | 2007 | |
ac112332 MC |
2008 | if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes, |
2009 | name_len)) == NULL) { | |
3c33c6f6 | 2010 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2011 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); |
3c33c6f6 | 2012 | goto err; |
0f113f3e MC |
2013 | } |
2014 | ||
ac112332 | 2015 | if (namebytes != (namestart + name_len)) { |
0f113f3e | 2016 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2017 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2018 | SSL_R_CA_DN_LENGTH_MISMATCH); |
2019 | goto err; | |
2020 | } | |
2021 | if (!sk_X509_NAME_push(ca_sk, xn)) { | |
b9908bf9 | 2022 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2023 | goto err; |
2024 | } | |
0f113f3e MC |
2025 | } |
2026 | ||
0f113f3e MC |
2027 | /* we should setup a certificate to return.... */ |
2028 | s->s3->tmp.cert_req = 1; | |
2029 | s->s3->tmp.ctype_num = ctype_num; | |
222561fe | 2030 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
0f113f3e MC |
2031 | s->s3->tmp.ca_names = ca_sk; |
2032 | ca_sk = NULL; | |
2033 | ||
b9908bf9 | 2034 | ret = MSG_PROCESS_CONTINUE_READING; |
cc273a93 | 2035 | goto done; |
0f113f3e | 2036 | err: |
fe3a3291 | 2037 | ossl_statem_set_error(s); |
cc273a93 | 2038 | done: |
222561fe | 2039 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
b9908bf9 | 2040 | return ret; |
0f113f3e MC |
2041 | } |
2042 | ||
2043 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
dfeab068 | 2044 | { |
0f113f3e | 2045 | return (X509_NAME_cmp(*a, *b)); |
dfeab068 | 2046 | } |
dfeab068 | 2047 | |
be3583fa | 2048 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2049 | { |
2050 | int al; | |
2051 | unsigned int ticklen; | |
2052 | unsigned long ticket_lifetime_hint; | |
b9908bf9 | 2053 | |
73999b62 MC |
2054 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
2055 | || !PACKET_get_net_2(pkt, &ticklen) | |
2056 | || PACKET_remaining(pkt) != ticklen) { | |
e711da71 | 2057 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2058 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
e711da71 EK |
2059 | goto f_err; |
2060 | } | |
2061 | ||
2062 | /* Server is allowed to change its mind and send an empty ticket. */ | |
2063 | if (ticklen == 0) | |
c9de4a20 | 2064 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2065 | |
98ece4ee MC |
2066 | if (s->session->session_id_length > 0) { |
2067 | int i = s->session_ctx->session_cache_mode; | |
2068 | SSL_SESSION *new_sess; | |
2069 | /* | |
2070 | * We reused an existing session, so we need to replace it with a new | |
2071 | * one | |
2072 | */ | |
2073 | if (i & SSL_SESS_CACHE_CLIENT) { | |
2074 | /* | |
2075 | * Remove the old session from the cache | |
2076 | */ | |
2077 | if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) { | |
2078 | if (s->session_ctx->remove_session_cb != NULL) | |
2079 | s->session_ctx->remove_session_cb(s->session_ctx, | |
2080 | s->session); | |
2081 | } else { | |
2082 | /* We carry on if this fails */ | |
2083 | SSL_CTX_remove_session(s->session_ctx, s->session); | |
2084 | } | |
2085 | } | |
2086 | ||
2087 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
2088 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2089 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
2090 | goto f_err; |
2091 | } | |
2092 | ||
2093 | SSL_SESSION_free(s->session); | |
2094 | s->session = new_sess; | |
2095 | } | |
2096 | ||
b548a1f1 RS |
2097 | OPENSSL_free(s->session->tlsext_tick); |
2098 | s->session->tlsext_ticklen = 0; | |
e711da71 | 2099 | |
0f113f3e | 2100 | s->session->tlsext_tick = OPENSSL_malloc(ticklen); |
a71edf3b | 2101 | if (s->session->tlsext_tick == NULL) { |
b9908bf9 | 2102 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2103 | goto err; |
2104 | } | |
73999b62 | 2105 | if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) { |
561e12bb | 2106 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2107 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
2108 | goto f_err; |
2109 | } | |
e711da71 EK |
2110 | |
2111 | s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint; | |
0f113f3e MC |
2112 | s->session->tlsext_ticklen = ticklen; |
2113 | /* | |
2114 | * There are two ways to detect a resumed ticket session. One is to set | |
2115 | * an appropriate session ID and then the server must return a match in | |
2116 | * ServerHello. This allows the normal client session ID matching to work | |
2117 | * and we know much earlier that the ticket has been accepted. The | |
2118 | * other way is to set zero length session ID when the ticket is | |
2119 | * presented and rely on the handshake to determine session resumption. | |
2120 | * We choose the former approach because this fits in with assumptions | |
2121 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2122 | * SHA256 is disabled) hash of the ticket. | |
2123 | */ | |
561e12bb | 2124 | EVP_Digest(s->session->tlsext_tick, ticklen, |
0f113f3e | 2125 | s->session->session_id, &s->session->session_id_length, |
0f113f3e | 2126 | EVP_sha256(), NULL); |
b9908bf9 | 2127 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2128 | f_err: |
2129 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2130 | err: | |
fe3a3291 | 2131 | ossl_statem_set_error(s); |
b9908bf9 | 2132 | return MSG_PROCESS_ERROR; |
0f113f3e | 2133 | } |
67c8e7f4 | 2134 | |
be3583fa | 2135 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2136 | { |
2137 | int al; | |
2138 | unsigned long resplen; | |
2139 | unsigned int type; | |
b9908bf9 | 2140 | |
73999b62 | 2141 | if (!PACKET_get_1(pkt, &type) |
ac63710a | 2142 | || type != TLSEXT_STATUSTYPE_ocsp) { |
0f113f3e | 2143 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2144 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE); |
0f113f3e MC |
2145 | goto f_err; |
2146 | } | |
73999b62 MC |
2147 | if (!PACKET_get_net_3(pkt, &resplen) |
2148 | || PACKET_remaining(pkt) != resplen) { | |
0f113f3e | 2149 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2150 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2151 | goto f_err; |
2152 | } | |
b548a1f1 | 2153 | OPENSSL_free(s->tlsext_ocsp_resp); |
ac63710a | 2154 | s->tlsext_ocsp_resp = OPENSSL_malloc(resplen); |
a71edf3b | 2155 | if (s->tlsext_ocsp_resp == NULL) { |
0f113f3e | 2156 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2157 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2158 | goto f_err; |
2159 | } | |
73999b62 | 2160 | if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) { |
ac63710a | 2161 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2162 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); |
ac63710a MC |
2163 | goto f_err; |
2164 | } | |
0f113f3e MC |
2165 | s->tlsext_ocsp_resplen = resplen; |
2166 | if (s->ctx->tlsext_status_cb) { | |
2167 | int ret; | |
2168 | ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); | |
2169 | if (ret == 0) { | |
2170 | al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; | |
b9908bf9 | 2171 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE); |
0f113f3e MC |
2172 | goto f_err; |
2173 | } | |
2174 | if (ret < 0) { | |
2175 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2176 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2177 | goto f_err; |
2178 | } | |
2179 | } | |
b9908bf9 | 2180 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2181 | f_err: |
2182 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2183 | ossl_statem_set_error(s); |
b9908bf9 | 2184 | return MSG_PROCESS_ERROR; |
0f113f3e | 2185 | } |
d02b48c6 | 2186 | |
be3583fa | 2187 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) |
b9908bf9 | 2188 | { |
73999b62 | 2189 | if (PACKET_remaining(pkt) > 0) { |
0f113f3e MC |
2190 | /* should contain no data */ |
2191 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
b9908bf9 | 2192 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); |
fe3a3291 | 2193 | ossl_statem_set_error(s); |
b9908bf9 | 2194 | return MSG_PROCESS_ERROR; |
0f113f3e | 2195 | } |
b9908bf9 MC |
2196 | |
2197 | #ifndef OPENSSL_NO_SRP | |
2198 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2199 | if (SRP_Calc_A_param(s) <= 0) { | |
2200 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2201 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 2202 | ossl_statem_set_error(s); |
b9908bf9 MC |
2203 | return MSG_PROCESS_ERROR; |
2204 | } | |
2205 | } | |
2206 | #endif | |
2207 | ||
a455d0f6 MC |
2208 | /* |
2209 | * at this point we check that we have the required stuff from | |
2210 | * the server | |
2211 | */ | |
2212 | if (!ssl3_check_cert_and_algorithm(s)) { | |
2213 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
fe3a3291 | 2214 | ossl_statem_set_error(s); |
a455d0f6 MC |
2215 | return MSG_PROCESS_ERROR; |
2216 | } | |
2217 | ||
473483d4 MC |
2218 | #ifndef OPENSSL_NO_SCTP |
2219 | /* Only applies to renegotiation */ | |
2220 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s)) | |
2221 | && s->renegotiate != 0) | |
2222 | return MSG_PROCESS_CONTINUE_PROCESSING; | |
2223 | else | |
2224 | #endif | |
2225 | return MSG_PROCESS_FINISHED_READING; | |
0f113f3e | 2226 | } |
176f31dd | 2227 | |
b9908bf9 | 2228 | int tls_construct_client_key_exchange(SSL *s) |
0f113f3e MC |
2229 | { |
2230 | unsigned char *p; | |
2231 | int n; | |
7689082b DSH |
2232 | #ifndef OPENSSL_NO_PSK |
2233 | size_t pskhdrlen = 0; | |
2234 | #endif | |
0f113f3e | 2235 | unsigned long alg_k; |
bc36ee62 | 2236 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
2237 | unsigned char *q; |
2238 | EVP_PKEY *pkey = NULL; | |
79df9d62 | 2239 | #endif |
10bf4fc2 | 2240 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
2241 | EC_KEY *clnt_ecdh = NULL; |
2242 | const EC_POINT *srvr_ecpoint = NULL; | |
2243 | EVP_PKEY *srvr_pub_pkey = NULL; | |
2244 | unsigned char *encodedPoint = NULL; | |
2245 | int encoded_pt_len = 0; | |
ea262260 | 2246 | #endif |
c660ec63 DSH |
2247 | unsigned char *pms = NULL; |
2248 | size_t pmslen = 0; | |
7689082b | 2249 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
d02b48c6 | 2250 | |
b9908bf9 | 2251 | p = ssl_handshake_start(s); |
d02b48c6 | 2252 | |
7689082b DSH |
2253 | |
2254 | #ifndef OPENSSL_NO_PSK | |
b9908bf9 MC |
2255 | if (alg_k & SSL_PSK) { |
2256 | int psk_err = 1; | |
2257 | /* | |
2258 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2259 | * \0-terminated identity. The last byte is for us for simulating | |
2260 | * strnlen. | |
2261 | */ | |
2262 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2263 | size_t identitylen; | |
2264 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2265 | size_t psklen; | |
2266 | ||
2267 | if (s->psk_client_callback == NULL) { | |
2268 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2269 | SSL_R_PSK_NO_CLIENT_CB); | |
2270 | goto err; | |
2271 | } | |
7689082b | 2272 | |
b9908bf9 | 2273 | memset(identity, 0, sizeof(identity)); |
7689082b | 2274 | |
b9908bf9 MC |
2275 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2276 | identity, sizeof(identity) - 1, | |
2277 | psk, sizeof(psk)); | |
7689082b | 2278 | |
b9908bf9 MC |
2279 | if (psklen > PSK_MAX_PSK_LEN) { |
2280 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2281 | ERR_R_INTERNAL_ERROR); | |
2282 | goto psk_err; | |
2283 | } else if (psklen == 0) { | |
2284 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2285 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
2286 | goto psk_err; | |
2287 | } | |
7689082b | 2288 | |
b9908bf9 MC |
2289 | OPENSSL_free(s->s3->tmp.psk); |
2290 | s->s3->tmp.psk = BUF_memdup(psk, psklen); | |
2291 | OPENSSL_cleanse(psk, psklen); | |
7689082b | 2292 | |
b9908bf9 MC |
2293 | if (s->s3->tmp.psk == NULL) { |
2294 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2295 | goto memerr; | |
2296 | } | |
7689082b | 2297 | |
b9908bf9 | 2298 | s->s3->tmp.psklen = psklen; |
7689082b | 2299 | |
b9908bf9 MC |
2300 | identitylen = strlen(identity); |
2301 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
2302 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2303 | ERR_R_INTERNAL_ERROR); | |
2304 | goto psk_err; | |
2305 | } | |
2306 | OPENSSL_free(s->session->psk_identity); | |
2307 | s->session->psk_identity = BUF_strdup(identity); | |
2308 | if (s->session->psk_identity == NULL) { | |
7689082b | 2309 | OPENSSL_cleanse(identity, sizeof(identity)); |
b9908bf9 | 2310 | goto memerr; |
7689082b | 2311 | } |
d02b48c6 | 2312 | |
b9908bf9 MC |
2313 | s2n(identitylen, p); |
2314 | memcpy(p, identity, identitylen); | |
2315 | pskhdrlen = 2 + identitylen; | |
2316 | p += identitylen; | |
2317 | psk_err = 0; | |
2318 | psk_err: | |
2319 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2320 | if (psk_err != 0) { | |
2321 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2322 | goto err; | |
0f113f3e | 2323 | } |
b9908bf9 MC |
2324 | } |
2325 | if (alg_k & SSL_kPSK) { | |
2326 | n = 0; | |
2327 | } else | |
2328 | #endif | |
2329 | ||
2330 | /* Fool emacs indentation */ | |
2331 | if (0) { | |
2332 | } | |
bc36ee62 | 2333 | #ifndef OPENSSL_NO_RSA |
b9908bf9 MC |
2334 | else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
2335 | RSA *rsa; | |
2336 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; | |
2337 | pms = OPENSSL_malloc(pmslen); | |
a71edf3b | 2338 | if (pms == NULL) |
b9908bf9 MC |
2339 | goto memerr; |
2340 | ||
2341 | if (s->session->peer == NULL) { | |
2342 | /* | |
2343 | * We should always have a server certificate with SSL_kRSA. | |
2344 | */ | |
2345 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2346 | ERR_R_INTERNAL_ERROR); | |
2347 | goto err; | |
2348 | } | |
0f113f3e | 2349 | |
361a1191 KR |
2350 | pkey = X509_get_pubkey(s->session->peer); |
2351 | if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA) | |
2352 | || (pkey->pkey.rsa == NULL)) { | |
2353 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2354 | ERR_R_INTERNAL_ERROR); | |
b9908bf9 | 2355 | EVP_PKEY_free(pkey); |
361a1191 | 2356 | goto err; |
b9908bf9 | 2357 | } |
361a1191 KR |
2358 | rsa = pkey->pkey.rsa; |
2359 | EVP_PKEY_free(pkey); | |
0f113f3e | 2360 | |
b9908bf9 MC |
2361 | pms[0] = s->client_version >> 8; |
2362 | pms[1] = s->client_version & 0xff; | |
2363 | if (RAND_bytes(pms + 2, pmslen - 2) <= 0) | |
2364 | goto err; | |
0f113f3e | 2365 | |
b9908bf9 MC |
2366 | q = p; |
2367 | /* Fix buf for TLS and beyond */ | |
2368 | if (s->version > SSL3_VERSION) | |
2369 | p += 2; | |
2370 | n = RSA_public_encrypt(pmslen, pms, p, rsa, RSA_PKCS1_PADDING); | |
0f113f3e | 2371 | # ifdef PKCS1_CHECK |
b9908bf9 MC |
2372 | if (s->options & SSL_OP_PKCS1_CHECK_1) |
2373 | p[1]++; | |
2374 | if (s->options & SSL_OP_PKCS1_CHECK_2) | |
2375 | tmp_buf[0] = 0x70; | |
0f113f3e | 2376 | # endif |
b9908bf9 MC |
2377 | if (n <= 0) { |
2378 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2379 | SSL_R_BAD_RSA_ENCRYPT); | |
2380 | goto err; | |
2381 | } | |
0f113f3e | 2382 | |
b9908bf9 MC |
2383 | /* Fix buf for TLS and beyond */ |
2384 | if (s->version > SSL3_VERSION) { | |
2385 | s2n(n, q); | |
2386 | n += 2; | |
0f113f3e | 2387 | } |
b9908bf9 | 2388 | } |
f9b3bff6 | 2389 | #endif |
bc36ee62 | 2390 | #ifndef OPENSSL_NO_DH |
b9908bf9 MC |
2391 | else if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd | SSL_kDHEPSK)) { |
2392 | DH *dh_srvr, *dh_clnt; | |
2393 | if (s->s3->peer_dh_tmp != NULL) | |
2394 | dh_srvr = s->s3->peer_dh_tmp; | |
2395 | else { | |
2396 | /* we get them from the cert */ | |
2397 | EVP_PKEY *spkey = NULL; | |
2398 | dh_srvr = NULL; | |
2399 | spkey = X509_get_pubkey(s->session->peer); | |
2400 | if (spkey) { | |
2401 | dh_srvr = EVP_PKEY_get1_DH(spkey); | |
2402 | EVP_PKEY_free(spkey); | |
0f113f3e | 2403 | } |
b9908bf9 MC |
2404 | if (dh_srvr == NULL) { |
2405 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2406 | ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
2407 | goto err; |
2408 | } | |
0f113f3e | 2409 | } |
b9908bf9 MC |
2410 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { |
2411 | /* Use client certificate key */ | |
2412 | EVP_PKEY *clkey = s->cert->key->privatekey; | |
2413 | dh_clnt = NULL; | |
2414 | if (clkey) | |
2415 | dh_clnt = EVP_PKEY_get1_DH(clkey); | |
2416 | if (dh_clnt == NULL) { | |
2417 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
0f113f3e MC |
2418 | ERR_R_INTERNAL_ERROR); |
2419 | goto err; | |
2420 | } | |
b9908bf9 MC |
2421 | } else { |
2422 | /* generate a new random key */ | |
2423 | if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) { | |
2424 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); | |
0f113f3e MC |
2425 | goto err; |
2426 | } | |
b9908bf9 MC |
2427 | if (!DH_generate_key(dh_clnt)) { |
2428 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); | |
2429 | DH_free(dh_clnt); | |
0f113f3e MC |
2430 | goto err; |
2431 | } | |
b9908bf9 | 2432 | } |
0f113f3e | 2433 | |
b9908bf9 MC |
2434 | pmslen = DH_size(dh_clnt); |
2435 | pms = OPENSSL_malloc(pmslen); | |
a71edf3b | 2436 | if (pms == NULL) |
b9908bf9 | 2437 | goto memerr; |
0f113f3e | 2438 | |
b9908bf9 MC |
2439 | /* |
2440 | * use the 'p' output buffer for the DH key, but make sure to | |
2441 | * clear it out afterwards | |
2442 | */ | |
0f113f3e | 2443 | |
b9908bf9 MC |
2444 | n = DH_compute_key(pms, dh_srvr->pub_key, dh_clnt); |
2445 | if (s->s3->peer_dh_tmp == NULL) | |
2446 | DH_free(dh_srvr); | |
0f113f3e | 2447 | |
b9908bf9 MC |
2448 | if (n <= 0) { |
2449 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); | |
2450 | DH_free(dh_clnt); | |
2451 | goto err; | |
2452 | } | |
2453 | pmslen = n; | |
0f113f3e | 2454 | |
b9908bf9 MC |
2455 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) |
2456 | n = 0; | |
2457 | else { | |
2458 | /* send off the data */ | |
2459 | n = BN_num_bytes(dh_clnt->pub_key); | |
2460 | s2n(n, p); | |
2461 | BN_bn2bin(dh_clnt->pub_key, p); | |
2462 | n += 2; | |
0f113f3e | 2463 | } |
c660ec63 | 2464 | |
b9908bf9 MC |
2465 | DH_free(dh_clnt); |
2466 | } | |
2467 | #endif | |
0f113f3e | 2468 | |
b9908bf9 MC |
2469 | #ifndef OPENSSL_NO_EC |
2470 | else if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe | SSL_kECDHEPSK)) { | |
2471 | const EC_GROUP *srvr_group = NULL; | |
2472 | EC_KEY *tkey; | |
2473 | int ecdh_clnt_cert = 0; | |
2474 | int field_size = 0; | |
2475 | /* | |
2476 | * Did we send out the client's ECDH share for use in premaster | |
2477 | * computation as part of client certificate? If so, set | |
2478 | * ecdh_clnt_cert to 1. | |
2479 | */ | |
2480 | if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) { | |
2481 | /*- | |
2482 | * XXX: For now, we do not support client | |
2483 | * authentication using ECDH certificates. | |
2484 | * To add such support, one needs to add | |
2485 | * code that checks for appropriate | |
2486 | * conditions and sets ecdh_clnt_cert to 1. | |
2487 | * For example, the cert have an ECC | |
2488 | * key on the same curve as the server's | |
2489 | * and the key should be authorized for | |
2490 | * key agreement. | |
0f113f3e | 2491 | * |
b9908bf9 MC |
2492 | * One also needs to add code in ssl3_connect |
2493 | * to skip sending the certificate verify | |
2494 | * message. | |
2495 | * | |
2496 | * if ((s->cert->key->privatekey != NULL) && | |
2497 | * (s->cert->key->privatekey->type == | |
2498 | * EVP_PKEY_EC) && ...) | |
2499 | * ecdh_clnt_cert = 1; | |
0f113f3e | 2500 | */ |
b9908bf9 | 2501 | } |
0f113f3e | 2502 | |
b9908bf9 MC |
2503 | if (s->s3->peer_ecdh_tmp != NULL) { |
2504 | tkey = s->s3->peer_ecdh_tmp; | |
2505 | } else { | |
2506 | /* Get the Server Public Key from Cert */ | |
2507 | srvr_pub_pkey = X509_get_pubkey(s->session->peer); | |
2508 | if ((srvr_pub_pkey == NULL) | |
2509 | || (srvr_pub_pkey->type != EVP_PKEY_EC) | |
2510 | || (srvr_pub_pkey->pkey.ec == NULL)) { | |
2511 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
266483d2 MC |
2512 | ERR_R_INTERNAL_ERROR); |
2513 | goto err; | |
0f113f3e | 2514 | } |
b9908bf9 MC |
2515 | |
2516 | tkey = srvr_pub_pkey->pkey.ec; | |
2517 | } | |
2518 | ||
2519 | srvr_group = EC_KEY_get0_group(tkey); | |
2520 | srvr_ecpoint = EC_KEY_get0_public_key(tkey); | |
2521 | ||
2522 | if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) { | |
2523 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2524 | ERR_R_INTERNAL_ERROR); | |
2525 | goto err; | |
2526 | } | |
2527 | ||
2528 | if ((clnt_ecdh = EC_KEY_new()) == NULL) { | |
2529 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2530 | ERR_R_MALLOC_FAILURE); | |
2531 | goto err; | |
2532 | } | |
2533 | ||
2534 | if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) { | |
2535 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); | |
2536 | goto err; | |
2537 | } | |
2538 | if (ecdh_clnt_cert) { | |
0f113f3e | 2539 | /* |
b9908bf9 MC |
2540 | * Reuse key info from our certificate We only need our |
2541 | * private key to perform the ECDH computation. | |
0f113f3e | 2542 | */ |
b9908bf9 MC |
2543 | const BIGNUM *priv_key; |
2544 | tkey = s->cert->key->privatekey->pkey.ec; | |
2545 | priv_key = EC_KEY_get0_private_key(tkey); | |
2546 | if (priv_key == NULL) { | |
2547 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2548 | ERR_R_MALLOC_FAILURE); | |
0f113f3e MC |
2549 | goto err; |
2550 | } | |
b9908bf9 MC |
2551 | if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) { |
2552 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); | |
0f113f3e MC |
2553 | goto err; |
2554 | } | |
b9908bf9 MC |
2555 | } else { |
2556 | /* Generate a new ECDH key pair */ | |
2557 | if (!(EC_KEY_generate_key(clnt_ecdh))) { | |
2558 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2559 | ERR_R_ECDH_LIB); | |
2560 | goto err; | |
0f113f3e | 2561 | } |
b9908bf9 MC |
2562 | } |
2563 | ||
2564 | /* | |
2565 | * use the 'p' output buffer for the ECDH key, but make sure to | |
2566 | * clear it out afterwards | |
2567 | */ | |
0f113f3e | 2568 | |
b9908bf9 MC |
2569 | field_size = EC_GROUP_get_degree(srvr_group); |
2570 | if (field_size <= 0) { | |
2571 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); | |
2572 | goto err; | |
0f113f3e | 2573 | } |
b9908bf9 MC |
2574 | pmslen = (field_size + 7) / 8; |
2575 | pms = OPENSSL_malloc(pmslen); | |
a71edf3b | 2576 | if (pms == NULL) |
b9908bf9 MC |
2577 | goto memerr; |
2578 | n = ECDH_compute_key(pms, pmslen, srvr_ecpoint, clnt_ecdh, NULL); | |
2579 | if (n <= 0 || pmslen != (size_t)n) { | |
2580 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); | |
2581 | goto err; | |
2582 | } | |
2583 | ||
2584 | if (ecdh_clnt_cert) { | |
2585 | /* Send empty client key exch message */ | |
2586 | n = 0; | |
2587 | } else { | |
2588 | /* | |
2589 | * First check the size of encoding and allocate memory | |
2590 | * accordingly. | |
2591 | */ | |
2592 | encoded_pt_len = | |
cae41364 DSH |
2593 | EC_KEY_key2buf(clnt_ecdh, POINT_CONVERSION_UNCOMPRESSED, |
2594 | &encodedPoint, NULL); | |
2595 | ||
2596 | if (encoded_pt_len == 0) { | |
2597 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); | |
0f113f3e MC |
2598 | goto err; |
2599 | } | |
b9908bf9 | 2600 | |
cae41364 | 2601 | n = encoded_pt_len; |
b9908bf9 MC |
2602 | |
2603 | *p = n; /* length of encoded point */ | |
2604 | /* Encoded point will be copied here */ | |
2605 | p += 1; | |
2606 | /* copy the point */ | |
2607 | memcpy(p, encodedPoint, n); | |
2608 | /* increment n to account for length field */ | |
2609 | n += 1; | |
0f113f3e MC |
2610 | } |
2611 | ||
b9908bf9 | 2612 | /* Free allocated memory */ |
b9908bf9 MC |
2613 | OPENSSL_free(encodedPoint); |
2614 | EC_KEY_free(clnt_ecdh); | |
2615 | EVP_PKEY_free(srvr_pub_pkey); | |
2616 | } | |
2617 | #endif /* !OPENSSL_NO_EC */ | |
2a9b9654 | 2618 | #ifndef OPENSSL_NO_GOST |
b9908bf9 MC |
2619 | else if (alg_k & SSL_kGOST) { |
2620 | /* GOST key exchange message creation */ | |
2621 | EVP_PKEY_CTX *pkey_ctx; | |
2622 | X509 *peer_cert; | |
2623 | size_t msglen; | |
2624 | unsigned int md_len; | |
2625 | unsigned char shared_ukm[32], tmp[256]; | |
2626 | EVP_MD_CTX *ukm_hash; | |
2627 | EVP_PKEY *pub_key; | |
e44380a9 DB |
2628 | int dgst_nid = NID_id_GostR3411_94; |
2629 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
2630 | dgst_nid = NID_id_GostR3411_2012_256; | |
2631 | ||
b9908bf9 MC |
2632 | |
2633 | pmslen = 32; | |
2634 | pms = OPENSSL_malloc(pmslen); | |
a71edf3b | 2635 | if (pms == NULL) |
b9908bf9 | 2636 | goto memerr; |
7689082b | 2637 | |
b9908bf9 MC |
2638 | /* |
2639 | * Get server sertificate PKEY and create ctx from it | |
2640 | */ | |
2641 | peer_cert = s->session->peer; | |
2642 | if (!peer_cert) { | |
2643 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2644 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); | |
77d514c5 MC |
2645 | goto err; |
2646 | } | |
2647 | ||
b9908bf9 MC |
2648 | pkey_ctx = EVP_PKEY_CTX_new(pub_key = |
2649 | X509_get_pubkey(peer_cert), NULL); | |
a71edf3b MC |
2650 | if (pkey_ctx == NULL) { |
2651 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2652 | ERR_R_MALLOC_FAILURE); | |
2653 | goto err; | |
2654 | } | |
b9908bf9 MC |
2655 | /* |
2656 | * If we have send a certificate, and certificate key | |
5f3d93e4 | 2657 | * parameters match those of server certificate, use |
b9908bf9 MC |
2658 | * certificate key for key exchange |
2659 | */ | |
0f113f3e | 2660 | |
b9908bf9 MC |
2661 | /* Otherwise, generate ephemeral key pair */ |
2662 | ||
5f3d93e4 MC |
2663 | if (pkey_ctx == NULL |
2664 | || EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
2665 | /* Generate session key */ | |
2666 | || RAND_bytes(pms, pmslen) <= 0) { | |
b9908bf9 MC |
2667 | EVP_PKEY_CTX_free(pkey_ctx); |
2668 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2669 | ERR_R_INTERNAL_ERROR); | |
2670 | goto err; | |
2671 | }; | |
c660ec63 | 2672 | /* |
b9908bf9 | 2673 | * If we have client certificate, use its secret as peer key |
c660ec63 | 2674 | */ |
b9908bf9 MC |
2675 | if (s->s3->tmp.cert_req && s->cert->key->privatekey) { |
2676 | if (EVP_PKEY_derive_set_peer | |
2677 | (pkey_ctx, s->cert->key->privatekey) <= 0) { | |
2678 | /* | |
2679 | * If there was an error - just ignore it. Ephemeral key | |
2680 | * * would be used | |
2681 | */ | |
2682 | ERR_clear_error(); | |
c660ec63 DSH |
2683 | } |
2684 | } | |
b9908bf9 MC |
2685 | /* |
2686 | * Compute shared IV and store it in algorithm-specific context | |
2687 | * data | |
2688 | */ | |
bfb0641f | 2689 | ukm_hash = EVP_MD_CTX_new(); |
5f3d93e4 | 2690 | if (EVP_DigestInit(ukm_hash, |
e44380a9 | 2691 | EVP_get_digestbynid(dgst_nid)) <= 0 |
5f3d93e4 MC |
2692 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, |
2693 | SSL3_RANDOM_SIZE) <= 0 | |
2694 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2695 | SSL3_RANDOM_SIZE) <= 0 | |
2696 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
bfb0641f | 2697 | EVP_MD_CTX_free(ukm_hash); |
5f3d93e4 MC |
2698 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, |
2699 | ERR_R_INTERNAL_ERROR); | |
2700 | goto err; | |
2701 | } | |
bfb0641f | 2702 | EVP_MD_CTX_free(ukm_hash); |
b9908bf9 MC |
2703 | if (EVP_PKEY_CTX_ctrl |
2704 | (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8, | |
2705 | shared_ukm) < 0) { | |
2706 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2707 | SSL_R_LIBRARY_BUG); | |
2708 | goto err; | |
c660ec63 | 2709 | } |
b9908bf9 MC |
2710 | /* Make GOST keytransport blob message */ |
2711 | /* | |
2712 | * Encapsulate it into sequence | |
2713 | */ | |
2714 | *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; | |
2715 | msglen = 255; | |
5f3d93e4 | 2716 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { |
b9908bf9 MC |
2717 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, |
2718 | SSL_R_LIBRARY_BUG); | |
c660ec63 DSH |
2719 | goto err; |
2720 | } | |
b9908bf9 MC |
2721 | if (msglen >= 0x80) { |
2722 | *(p++) = 0x81; | |
2723 | *(p++) = msglen & 0xff; | |
2724 | n = msglen + 3; | |
2725 | } else { | |
2726 | *(p++) = msglen & 0xff; | |
2727 | n = msglen + 2; | |
2728 | } | |
2729 | memcpy(p, tmp, msglen); | |
2730 | /* Check if pubkey from client certificate was used */ | |
2731 | if (EVP_PKEY_CTX_ctrl | |
2732 | (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) { | |
2733 | /* Set flag "skip certificate verify" */ | |
2734 | s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; | |
2735 | } | |
2736 | EVP_PKEY_CTX_free(pkey_ctx); | |
2737 | EVP_PKEY_free(pub_key); | |
2738 | ||
2739 | } | |
2a9b9654 | 2740 | #endif |
b9908bf9 MC |
2741 | #ifndef OPENSSL_NO_SRP |
2742 | else if (alg_k & SSL_kSRP) { | |
2743 | if (s->srp_ctx.A != NULL) { | |
2744 | /* send off the data */ | |
2745 | n = BN_num_bytes(s->srp_ctx.A); | |
2746 | s2n(n, p); | |
2747 | BN_bn2bin(s->srp_ctx.A, p); | |
2748 | n += 2; | |
2749 | } else { | |
2750 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2751 | ERR_R_INTERNAL_ERROR); | |
2752 | goto err; | |
2753 | } | |
2754 | OPENSSL_free(s->session->srp_username); | |
2755 | s->session->srp_username = BUF_strdup(s->srp_ctx.login); | |
2756 | if (s->session->srp_username == NULL) { | |
2757 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2758 | ERR_R_MALLOC_FAILURE); | |
69f68237 MC |
2759 | goto err; |
2760 | } | |
c660ec63 | 2761 | } |
b9908bf9 MC |
2762 | #endif |
2763 | else { | |
2764 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2765 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2766 | goto err; | |
2767 | } | |
2768 | ||
2769 | #ifndef OPENSSL_NO_PSK | |
2770 | n += pskhdrlen; | |
2771 | #endif | |
2772 | ||
2773 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) { | |
2774 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2775 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2776 | goto err; | |
2777 | } | |
2778 | ||
2779 | s->s3->tmp.pms = pms; | |
2780 | s->s3->tmp.pmslen = pmslen; | |
2781 | ||
2782 | return 1; | |
c660ec63 DSH |
2783 | memerr: |
2784 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2785 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); |
0f113f3e | 2786 | err: |
4b45c6e5 | 2787 | OPENSSL_clear_free(pms, pmslen); |
76106e60 | 2788 | s->s3->tmp.pms = NULL; |
10bf4fc2 | 2789 | #ifndef OPENSSL_NO_EC |
b548a1f1 | 2790 | OPENSSL_free(encodedPoint); |
8fdc3734 | 2791 | EC_KEY_free(clnt_ecdh); |
0f113f3e | 2792 | EVP_PKEY_free(srvr_pub_pkey); |
7689082b DSH |
2793 | #endif |
2794 | #ifndef OPENSSL_NO_PSK | |
2795 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
2796 | s->s3->tmp.psk = NULL; | |
0f113f3e | 2797 | #endif |
fe3a3291 | 2798 | ossl_statem_set_error(s); |
b9908bf9 MC |
2799 | return 0; |
2800 | } | |
2801 | ||
2802 | int tls_client_key_exchange_post_work(SSL *s) | |
2803 | { | |
2804 | unsigned char *pms = NULL; | |
2805 | size_t pmslen = 0; | |
2806 | ||
2807 | #ifndef OPENSSL_NO_SRP | |
2808 | /* Check for SRP */ | |
2809 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2810 | if (!srp_generate_client_master_secret(s)) { | |
2811 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
2812 | ERR_R_INTERNAL_ERROR); | |
2813 | goto err; | |
2814 | } | |
2815 | return 1; | |
2816 | } | |
2817 | #endif | |
2818 | pms = s->s3->tmp.pms; | |
2819 | pmslen = s->s3->tmp.pmslen; | |
2820 | ||
2821 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
2822 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2823 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
2824 | goto err; | |
2825 | } | |
2826 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
2827 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2828 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
2829 | goto err; | |
2830 | } | |
473483d4 MC |
2831 | |
2832 | #ifndef OPENSSL_NO_SCTP | |
2833 | if (SSL_IS_DTLS(s)) { | |
2834 | unsigned char sctpauthkey[64]; | |
2835 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
2836 | ||
2837 | /* | |
2838 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
2839 | * used. | |
2840 | */ | |
141eb8c6 MC |
2841 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
2842 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
2843 | |
2844 | if (SSL_export_keying_material(s, sctpauthkey, | |
2845 | sizeof(sctpauthkey), labelbuffer, | |
2846 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
2847 | goto err; | |
2848 | ||
2849 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
2850 | sizeof(sctpauthkey), sctpauthkey); | |
2851 | } | |
2852 | #endif | |
2853 | ||
b9908bf9 MC |
2854 | return 1; |
2855 | err: | |
2856 | OPENSSL_clear_free(pms, pmslen); | |
2857 | s->s3->tmp.pms = NULL; | |
2858 | return 0; | |
0f113f3e | 2859 | } |
d02b48c6 | 2860 | |
b9908bf9 | 2861 | int tls_construct_client_verify(SSL *s) |
0f113f3e MC |
2862 | { |
2863 | unsigned char *p; | |
0f113f3e | 2864 | EVP_PKEY *pkey; |
a0f63828 | 2865 | const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys]; |
6e59a892 | 2866 | EVP_MD_CTX *mctx; |
0f113f3e | 2867 | unsigned u = 0; |
2a9b9654 | 2868 | unsigned long n = 0; |
a0f63828 DSH |
2869 | long hdatalen = 0; |
2870 | void *hdata; | |
0f113f3e | 2871 | |
bfb0641f | 2872 | mctx = EVP_MD_CTX_new(); |
6e59a892 RL |
2873 | if (mctx == NULL) { |
2874 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE); | |
2875 | goto err; | |
2876 | } | |
0f113f3e | 2877 | |
b9908bf9 MC |
2878 | p = ssl_handshake_start(s); |
2879 | pkey = s->cert->key->privatekey; | |
a0f63828 DSH |
2880 | |
2881 | hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); | |
2882 | if (hdatalen <= 0) { | |
5f3d93e4 MC |
2883 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); |
2884 | goto err; | |
2885 | } | |
a0f63828 DSH |
2886 | if (SSL_USE_SIGALGS(s)) { |
2887 | if (!tls12_get_sigandhash(p, pkey, md)) { | |
b9908bf9 MC |
2888 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); |
2889 | goto err; | |
0f113f3e | 2890 | } |
a0f63828 | 2891 | p += 2; |
2a9b9654 | 2892 | n = 2; |
a0f63828 | 2893 | } |
855a54a9 | 2894 | #ifdef SSL_DEBUG |
a0f63828 | 2895 | fprintf(stderr, "Using client alg %s\n", EVP_MD_name(md)); |
b9908bf9 | 2896 | #endif |
6e59a892 RL |
2897 | if (!EVP_SignInit_ex(mctx, md, NULL) |
2898 | || !EVP_SignUpdate(mctx, hdata, hdatalen) | |
a0f63828 | 2899 | || (s->version == SSL3_VERSION |
6e59a892 | 2900 | && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET, |
a0f63828 DSH |
2901 | s->session->master_key_length, |
2902 | s->session->master_key)) | |
6e59a892 | 2903 | || !EVP_SignFinal(mctx, p + 2, &u, pkey)) { |
a0f63828 DSH |
2904 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB); |
2905 | goto err; | |
2906 | } | |
2a9b9654 | 2907 | #ifndef OPENSSL_NO_GOST |
e44380a9 DB |
2908 | if (pkey->type == NID_id_GostR3410_2001 |
2909 | || pkey->type == NID_id_GostR3410_2012_256 | |
2910 | || pkey->type == NID_id_GostR3410_2012_512) { | |
2a9b9654 | 2911 | BUF_reverse(p + 2, NULL, u); |
b9908bf9 | 2912 | } |
2a9b9654 | 2913 | #endif |
a0f63828 DSH |
2914 | |
2915 | s2n(u, p); | |
2a9b9654 | 2916 | n += u + 2; |
a0f63828 DSH |
2917 | /* Digest cached records and discard handshake buffer */ |
2918 | if (!ssl3_digest_cached_records(s, 0)) | |
2919 | goto err; | |
b9908bf9 MC |
2920 | if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) { |
2921 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); | |
2922 | goto err; | |
0f113f3e | 2923 | } |
b9908bf9 | 2924 | |
bfb0641f | 2925 | EVP_MD_CTX_free(mctx); |
b9908bf9 | 2926 | return 1; |
0f113f3e | 2927 | err: |
bfb0641f | 2928 | EVP_MD_CTX_free(mctx); |
b9908bf9 | 2929 | return 0; |
0f113f3e MC |
2930 | } |
2931 | ||
2932 | /* | |
2933 | * Check a certificate can be used for client authentication. Currently check | |
2934 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
2935 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
2936 | */ |
2937 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e MC |
2938 | { |
2939 | unsigned long alg_k; | |
2940 | if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey) | |
2941 | return 0; | |
2942 | /* If no suitable signature algorithm can't use certificate */ | |
d376e57d | 2943 | if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys]) |
0f113f3e MC |
2944 | return 0; |
2945 | /* | |
2946 | * If strict mode check suitability of chain before using it. This also | |
2947 | * adjusts suite B digest if necessary. | |
2948 | */ | |
2949 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
2950 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
2951 | return 0; | |
2952 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
2953 | /* See if we can use client certificate for fixed DH */ | |
2954 | if (alg_k & (SSL_kDHr | SSL_kDHd)) { | |
a273c6ee | 2955 | int i = s->session->peer_type; |
0f113f3e MC |
2956 | EVP_PKEY *clkey = NULL, *spkey = NULL; |
2957 | clkey = s->cert->key->privatekey; | |
2958 | /* If client key not DH assume it can be used */ | |
2959 | if (EVP_PKEY_id(clkey) != EVP_PKEY_DH) | |
2960 | return 1; | |
2961 | if (i >= 0) | |
a273c6ee | 2962 | spkey = X509_get_pubkey(s->session->peer); |
0f113f3e MC |
2963 | if (spkey) { |
2964 | /* Compare server and client parameters */ | |
2965 | i = EVP_PKEY_cmp_parameters(clkey, spkey); | |
2966 | EVP_PKEY_free(spkey); | |
2967 | if (i != 1) | |
2968 | return 0; | |
2969 | } | |
2970 | s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; | |
2971 | } | |
2972 | return 1; | |
2973 | } | |
0d609395 | 2974 | |
be3583fa | 2975 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
2976 | { |
2977 | X509 *x509 = NULL; | |
2978 | EVP_PKEY *pkey = NULL; | |
2979 | int i; | |
2980 | ||
b9908bf9 | 2981 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
2982 | /* Let cert callback update client certificates if required */ |
2983 | if (s->cert->cert_cb) { | |
2984 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
2985 | if (i < 0) { | |
2986 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 2987 | return WORK_MORE_A; |
0f113f3e MC |
2988 | } |
2989 | if (i == 0) { | |
2990 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 2991 | ossl_statem_set_error(s); |
0f113f3e MC |
2992 | return 0; |
2993 | } | |
2994 | s->rwstate = SSL_NOTHING; | |
2995 | } | |
2996 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
2997 | return WORK_FINISHED_CONTINUE; |
2998 | ||
2999 | /* Fall through to WORK_MORE_B */ | |
3000 | wst = WORK_MORE_B; | |
0f113f3e MC |
3001 | } |
3002 | ||
3003 | /* We need to get a client cert */ | |
b9908bf9 | 3004 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
3005 | /* |
3006 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3007 | * return(-1); We then get retied later | |
3008 | */ | |
0f113f3e MC |
3009 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
3010 | if (i < 0) { | |
3011 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 3012 | return WORK_MORE_B; |
0f113f3e MC |
3013 | } |
3014 | s->rwstate = SSL_NOTHING; | |
3015 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
3016 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
3017 | i = 0; | |
3018 | } else if (i == 1) { | |
3019 | i = 0; | |
b9908bf9 | 3020 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
3021 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
3022 | } | |
3023 | ||
222561fe | 3024 | X509_free(x509); |
25aaa98a | 3025 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3026 | if (i && !ssl3_check_client_certificate(s)) |
3027 | i = 0; | |
3028 | if (i == 0) { | |
3029 | if (s->version == SSL3_VERSION) { | |
3030 | s->s3->tmp.cert_req = 0; | |
3031 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 3032 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3033 | } else { |
3034 | s->s3->tmp.cert_req = 2; | |
124037fd | 3035 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 3036 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 3037 | ossl_statem_set_error(s); |
dab18ab5 DSH |
3038 | return 0; |
3039 | } | |
0f113f3e MC |
3040 | } |
3041 | } | |
3042 | ||
b9908bf9 | 3043 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
3044 | } |
3045 | ||
b9908bf9 MC |
3046 | /* Shouldn't ever get here */ |
3047 | return WORK_ERROR; | |
3048 | } | |
3049 | ||
3050 | int tls_construct_client_certificate(SSL *s) | |
3051 | { | |
3052 | if (!ssl3_output_cert_chain(s, | |
3053 | (s->s3->tmp.cert_req == | |
3054 | 2) ? NULL : s->cert->key)) { | |
3055 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
3056 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 3057 | ossl_statem_set_error(s); |
b9908bf9 | 3058 | return 0; |
0f113f3e | 3059 | } |
b9908bf9 MC |
3060 | |
3061 | return 1; | |
0f113f3e MC |
3062 | } |
3063 | ||
3064 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 3065 | |
36d16f8e | 3066 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 3067 | { |
60f43e9e RL |
3068 | int i; |
3069 | #ifndef OPENSSL_NO_EC | |
3070 | int idx; | |
3071 | #endif | |
0f113f3e MC |
3072 | long alg_k, alg_a; |
3073 | EVP_PKEY *pkey = NULL; | |
bc36ee62 | 3074 | #ifndef OPENSSL_NO_DH |
0f113f3e | 3075 | DH *dh; |
79df9d62 | 3076 | #endif |
26c79d56 | 3077 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 3078 | |
0f113f3e MC |
3079 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3080 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3081 | |
0f113f3e | 3082 | /* we don't have a certificate */ |
55a9a16f | 3083 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 3084 | return (1); |
bc36ee62 | 3085 | #ifndef OPENSSL_NO_DH |
8d92c1f8 | 3086 | dh = s->s3->peer_dh_tmp; |
79df9d62 | 3087 | #endif |
d02b48c6 | 3088 | |
0f113f3e | 3089 | /* This is the passed certificate */ |
d02b48c6 | 3090 | |
10bf4fc2 | 3091 | #ifndef OPENSSL_NO_EC |
60f43e9e | 3092 | idx = s->session->peer_type; |
0f113f3e | 3093 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 3094 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
3095 | /* check failed */ |
3096 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3097 | goto f_err; | |
3098 | } else { | |
3099 | return 1; | |
3100 | } | |
3101 | } else if (alg_a & SSL_aECDSA) { | |
3102 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3103 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
3104 | goto f_err; | |
3105 | } else if (alg_k & (SSL_kECDHr | SSL_kECDHe)) { | |
3106 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_ECDH_CERT); | |
3107 | goto f_err; | |
3108 | } | |
3109 | #endif | |
a273c6ee | 3110 | pkey = X509_get_pubkey(s->session->peer); |
a273c6ee | 3111 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
3112 | EVP_PKEY_free(pkey); |
3113 | ||
3114 | /* Check that we have a certificate if we require one */ | |
3115 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
3116 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3117 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
3118 | goto f_err; | |
3119 | } | |
bc36ee62 | 3120 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3121 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
3122 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3123 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
3124 | goto f_err; | |
3125 | } | |
d02b48c6 | 3126 | #endif |
bc36ee62 | 3127 | #ifndef OPENSSL_NO_RSA |
361a1191 KR |
3128 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && |
3129 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3130 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3131 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3132 | goto f_err; | |
0f113f3e | 3133 | } |
79df9d62 | 3134 | #endif |
bc36ee62 | 3135 | #ifndef OPENSSL_NO_DH |
26c79d56 KR |
3136 | if ((alg_k & SSL_kDHE) && (dh == NULL)) { |
3137 | al = SSL_AD_INTERNAL_ERROR; | |
3138 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
3139 | goto f_err; |
3140 | } else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) && | |
3141 | !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) { | |
3142 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3143 | SSL_R_MISSING_DH_RSA_CERT); | |
3144 | goto f_err; | |
3145 | } | |
3146 | # ifndef OPENSSL_NO_DSA | |
3147 | else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) && | |
3148 | !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) { | |
3149 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3150 | SSL_R_MISSING_DH_DSA_CERT); | |
3151 | goto f_err; | |
3152 | } | |
3153 | # endif | |
d02b48c6 RE |
3154 | #endif |
3155 | ||
0f113f3e MC |
3156 | return (1); |
3157 | f_err: | |
26c79d56 | 3158 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
3159 | return (0); |
3160 | } | |
3161 | ||
e481f9b9 | 3162 | #ifndef OPENSSL_NO_NEXTPROTONEG |
b9908bf9 MC |
3163 | int tls_construct_next_proto(SSL *s) |
3164 | { | |
3165 | unsigned int len, padding_len; | |
3166 | unsigned char *d; | |
3167 | ||
3168 | len = s->next_proto_negotiated_len; | |
3169 | padding_len = 32 - ((len + 2) % 32); | |
3170 | d = (unsigned char *)s->init_buf->data; | |
3171 | d[4] = len; | |
3172 | memcpy(d + 5, s->next_proto_negotiated, len); | |
3173 | d[5 + len] = padding_len; | |
3174 | memset(d + 6 + len, 0, padding_len); | |
3175 | *(d++) = SSL3_MT_NEXT_PROTO; | |
3176 | l2n3(2 + len + padding_len, d); | |
3177 | s->init_num = 4 + 2 + len + padding_len; | |
3178 | s->init_off = 0; | |
3179 | ||
3180 | return 1; | |
3181 | } | |
6434abbf | 3182 | #endif |
368888bc DSH |
3183 | |
3184 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) | |
0f113f3e MC |
3185 | { |
3186 | int i = 0; | |
368888bc | 3187 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3188 | if (s->ctx->client_cert_engine) { |
3189 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3190 | SSL_get_client_CA_list(s), | |
3191 | px509, ppkey, NULL, NULL, NULL); | |
3192 | if (i != 0) | |
3193 | return i; | |
3194 | } | |
3195 | #endif | |
3196 | if (s->ctx->client_cert_cb) | |
3197 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3198 | return i; | |
3199 | } | |
d45ba43d MC |
3200 | |
3201 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, | |
e9fa092e | 3202 | unsigned char *p) |
d45ba43d MC |
3203 | { |
3204 | int i, j = 0; | |
3205 | SSL_CIPHER *c; | |
3206 | unsigned char *q; | |
3207 | int empty_reneg_info_scsv = !s->renegotiate; | |
3208 | /* Set disabled masks for this session */ | |
3209 | ssl_set_client_disabled(s); | |
3210 | ||
3211 | if (sk == NULL) | |
3212 | return (0); | |
3213 | q = p; | |
d45ba43d MC |
3214 | |
3215 | for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { | |
3216 | c = sk_SSL_CIPHER_value(sk, i); | |
3217 | /* Skip disabled ciphers */ | |
3218 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) | |
3219 | continue; | |
3220 | #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL | |
3221 | if (c->id == SSL3_CK_SCSV) { | |
3222 | if (!empty_reneg_info_scsv) | |
3223 | continue; | |
3224 | else | |
3225 | empty_reneg_info_scsv = 0; | |
3226 | } | |
3227 | #endif | |
e9fa092e | 3228 | j = s->method->put_cipher_by_char(c, p); |
d45ba43d MC |
3229 | p += j; |
3230 | } | |
3231 | /* | |
3232 | * If p == q, no ciphers; caller indicates an error. Otherwise, add | |
3233 | * applicable SCSVs. | |
3234 | */ | |
3235 | if (p != q) { | |
3236 | if (empty_reneg_info_scsv) { | |
3237 | static SSL_CIPHER scsv = { | |
3238 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3239 | }; | |
e9fa092e | 3240 | j = s->method->put_cipher_by_char(&scsv, p); |
d45ba43d MC |
3241 | p += j; |
3242 | #ifdef OPENSSL_RI_DEBUG | |
3243 | fprintf(stderr, | |
3244 | "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n"); | |
3245 | #endif | |
3246 | } | |
3247 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3248 | static SSL_CIPHER scsv = { | |
3249 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3250 | }; | |
e9fa092e | 3251 | j = s->method->put_cipher_by_char(&scsv, p); |
d45ba43d MC |
3252 | p += j; |
3253 | } | |
3254 | } | |
3255 | ||
3256 | return (p - q); | |
3257 | } |