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8ba708e5 | 1 | /* ssl/statem/statem_clnt.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
3 | * All rights reserved. |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
0f113f3e | 8 | * |
d02b48c6 RE |
9 | * This library is free for commercial and non-commercial use as long as |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
0f113f3e | 15 | * |
d02b48c6 RE |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
0f113f3e | 22 | * |
d02b48c6 RE |
23 | * Redistribution and use in source and binary forms, with or without |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
0f113f3e | 52 | * |
d02b48c6 RE |
53 | * The licence and distribution terms for any publically available version or |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
8c74b5e5 | 58 | /* ==================================================================== |
52b8dad8 | 59 | * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. |
8c74b5e5 BM |
60 | * |
61 | * Redistribution and use in source and binary forms, with or without | |
62 | * modification, are permitted provided that the following conditions | |
63 | * are met: | |
64 | * | |
65 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 66 | * notice, this list of conditions and the following disclaimer. |
8c74b5e5 BM |
67 | * |
68 | * 2. Redistributions in binary form must reproduce the above copyright | |
69 | * notice, this list of conditions and the following disclaimer in | |
70 | * the documentation and/or other materials provided with the | |
71 | * distribution. | |
72 | * | |
73 | * 3. All advertising materials mentioning features or use of this | |
74 | * software must display the following acknowledgment: | |
75 | * "This product includes software developed by the OpenSSL Project | |
76 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
77 | * | |
78 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
79 | * endorse or promote products derived from this software without | |
80 | * prior written permission. For written permission, please contact | |
81 | * openssl-core@openssl.org. | |
82 | * | |
83 | * 5. Products derived from this software may not be called "OpenSSL" | |
84 | * nor may "OpenSSL" appear in their names without prior written | |
85 | * permission of the OpenSSL Project. | |
86 | * | |
87 | * 6. Redistributions of any form whatsoever must retain the following | |
88 | * acknowledgment: | |
89 | * "This product includes software developed by the OpenSSL Project | |
90 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
91 | * | |
92 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
93 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
94 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
95 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
96 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
97 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
98 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
99 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
100 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
101 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
102 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
103 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
104 | * ==================================================================== | |
105 | * | |
106 | * This product includes cryptographic software written by Eric Young | |
107 | * (eay@cryptsoft.com). This product includes software written by Tim | |
108 | * Hudson (tjh@cryptsoft.com). | |
109 | * | |
110 | */ | |
ea262260 BM |
111 | /* ==================================================================== |
112 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. | |
113 | * | |
0f113f3e | 114 | * Portions of the attached software ("Contribution") are developed by |
ea262260 BM |
115 | * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. |
116 | * | |
117 | * The Contribution is licensed pursuant to the OpenSSL open source | |
118 | * license provided above. | |
119 | * | |
ea262260 BM |
120 | * ECC cipher suite support in OpenSSL originally written by |
121 | * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. | |
122 | * | |
123 | */ | |
ddac1974 NL |
124 | /* ==================================================================== |
125 | * Copyright 2005 Nokia. All rights reserved. | |
126 | * | |
127 | * The portions of the attached software ("Contribution") is developed by | |
128 | * Nokia Corporation and is licensed pursuant to the OpenSSL open source | |
129 | * license. | |
130 | * | |
131 | * The Contribution, originally written by Mika Kousa and Pasi Eronen of | |
132 | * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites | |
133 | * support (see RFC 4279) to OpenSSL. | |
134 | * | |
135 | * No patent licenses or other rights except those expressly stated in | |
136 | * the OpenSSL open source license shall be deemed granted or received | |
137 | * expressly, by implication, estoppel, or otherwise. | |
138 | * | |
139 | * No assurances are provided by Nokia that the Contribution does not | |
140 | * infringe the patent or other intellectual property rights of any third | |
141 | * party or that the license provides you with all the necessary rights | |
142 | * to make use of the Contribution. | |
143 | * | |
144 | * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN | |
145 | * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA | |
146 | * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY | |
147 | * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR | |
148 | * OTHERWISE. | |
149 | */ | |
d02b48c6 RE |
150 | |
151 | #include <stdio.h> | |
8ba708e5 | 152 | #include "../ssl_locl.h" |
61ae935a | 153 | #include "statem_locl.h" |
ec577822 BM |
154 | #include <openssl/buffer.h> |
155 | #include <openssl/rand.h> | |
156 | #include <openssl/objects.h> | |
157 | #include <openssl/evp.h> | |
dbad1690 | 158 | #include <openssl/md5.h> |
3eeaab4b | 159 | #ifndef OPENSSL_NO_DH |
0f113f3e | 160 | # include <openssl/dh.h> |
3eeaab4b | 161 | #endif |
d095b68d | 162 | #include <openssl/bn.h> |
368888bc | 163 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e | 164 | # include <openssl/engine.h> |
368888bc | 165 | #endif |
f9b3bff6 | 166 | |
7ab09630 | 167 | static ossl_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 | */ | |
7ab09630 | 182 | static ossl_inline int cert_req_allowed(SSL *s) |
61ae935a MC |
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: | |
bb1aaab4 MC |
306 | /* |
307 | * The CertificateStatus message is optional even if | |
308 | * |tlsext_status_expected| is set | |
309 | */ | |
310 | if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { | |
311 | st->hand_state = TLS_ST_CR_CERT_STATUS; | |
312 | return 1; | |
a455d0f6 MC |
313 | } |
314 | /* Fall through */ | |
315 | ||
316 | case TLS_ST_CR_CERT_STATUS: | |
317 | ske_expected = key_exchange_expected(s); | |
318 | if (ske_expected < 0) | |
319 | return 0; | |
320 | /* SKE is optional for some PSK ciphersuites */ | |
321 | if (ske_expected | |
322 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) | |
323 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
61ae935a MC |
324 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
325 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
326 | return 1; | |
61ae935a | 327 | } |
a455d0f6 | 328 | return 0; |
61ae935a | 329 | } |
a455d0f6 | 330 | /* Fall through */ |
61ae935a | 331 | |
a455d0f6 MC |
332 | case TLS_ST_CR_KEY_EXCH: |
333 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
334 | if (cert_req_allowed(s)) { | |
61ae935a MC |
335 | st->hand_state = TLS_ST_CR_CERT_REQ; |
336 | return 1; | |
61ae935a | 337 | } |
a455d0f6 | 338 | return 0; |
61ae935a | 339 | } |
a455d0f6 | 340 | /* Fall through */ |
61ae935a MC |
341 | |
342 | case TLS_ST_CR_CERT_REQ: | |
343 | if (mt == SSL3_MT_SERVER_DONE) { | |
344 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
345 | return 1; | |
346 | } | |
347 | break; | |
348 | ||
349 | case TLS_ST_CW_FINISHED: | |
350 | if (mt == SSL3_MT_NEWSESSION_TICKET && s->tlsext_ticket_expected) { | |
351 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
352 | return 1; | |
353 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
354 | st->hand_state = TLS_ST_CR_CHANGE; | |
355 | return 1; | |
356 | } | |
357 | break; | |
358 | ||
359 | case TLS_ST_CR_SESSION_TICKET: | |
360 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
361 | st->hand_state = TLS_ST_CR_CHANGE; | |
362 | return 1; | |
363 | } | |
364 | break; | |
365 | ||
366 | case TLS_ST_CR_CHANGE: | |
367 | if (mt == SSL3_MT_FINISHED) { | |
368 | st->hand_state = TLS_ST_CR_FINISHED; | |
369 | return 1; | |
370 | } | |
371 | break; | |
372 | ||
373 | default: | |
374 | break; | |
375 | } | |
376 | ||
377 | /* No valid transition found */ | |
378 | return 0; | |
379 | } | |
380 | ||
381 | /* | |
382 | * client_write_transition() works out what handshake state to move to next | |
383 | * when the client is writing messages to be sent to the server. | |
384 | */ | |
8481f583 | 385 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 386 | { |
d6f1a6e9 | 387 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
388 | |
389 | switch(st->hand_state) { | |
390 | case TLS_ST_OK: | |
391 | /* Renegotiation - fall through */ | |
392 | case TLS_ST_BEFORE: | |
393 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
394 | return WRITE_TRAN_CONTINUE; | |
395 | ||
396 | case TLS_ST_CW_CLNT_HELLO: | |
397 | /* | |
398 | * No transition at the end of writing because we don't know what | |
399 | * we will be sent | |
400 | */ | |
401 | return WRITE_TRAN_FINISHED; | |
402 | ||
403 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: | |
404 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
405 | return WRITE_TRAN_CONTINUE; | |
406 | ||
407 | case TLS_ST_CR_SRVR_DONE: | |
408 | if (s->s3->tmp.cert_req) | |
409 | st->hand_state = TLS_ST_CW_CERT; | |
410 | else | |
411 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
412 | return WRITE_TRAN_CONTINUE; | |
413 | ||
414 | case TLS_ST_CW_CERT: | |
415 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
416 | return WRITE_TRAN_CONTINUE; | |
417 | ||
418 | case TLS_ST_CW_KEY_EXCH: | |
419 | /* | |
420 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
421 | * sent, but no verify packet is sent | |
422 | */ | |
423 | /* | |
424 | * XXX: For now, we do not support client authentication in ECDH | |
425 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
426 | * need to skip the certificate verify message when client's | |
427 | * ECDH public key is sent inside the client certificate. | |
428 | */ | |
429 | if (s->s3->tmp.cert_req == 1) { | |
430 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
431 | } else { | |
432 | st->hand_state = TLS_ST_CW_CHANGE; | |
433 | } | |
434 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
435 | st->hand_state = TLS_ST_CW_CHANGE; | |
436 | } | |
437 | return WRITE_TRAN_CONTINUE; | |
438 | ||
439 | case TLS_ST_CW_CERT_VRFY: | |
440 | st->hand_state = TLS_ST_CW_CHANGE; | |
441 | return WRITE_TRAN_CONTINUE; | |
442 | ||
443 | case TLS_ST_CW_CHANGE: | |
444 | #if defined(OPENSSL_NO_NEXTPROTONEG) | |
445 | st->hand_state = TLS_ST_CW_FINISHED; | |
446 | #else | |
447 | if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen) | |
448 | st->hand_state = TLS_ST_CW_NEXT_PROTO; | |
449 | else | |
450 | st->hand_state = TLS_ST_CW_FINISHED; | |
451 | #endif | |
452 | return WRITE_TRAN_CONTINUE; | |
453 | ||
454 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
455 | case TLS_ST_CW_NEXT_PROTO: | |
456 | st->hand_state = TLS_ST_CW_FINISHED; | |
457 | return WRITE_TRAN_CONTINUE; | |
458 | #endif | |
459 | ||
460 | case TLS_ST_CW_FINISHED: | |
461 | if (s->hit) { | |
462 | st->hand_state = TLS_ST_OK; | |
fe3a3291 | 463 | ossl_statem_set_in_init(s, 0); |
61ae935a MC |
464 | return WRITE_TRAN_CONTINUE; |
465 | } else { | |
466 | return WRITE_TRAN_FINISHED; | |
467 | } | |
468 | ||
469 | case TLS_ST_CR_FINISHED: | |
470 | if (s->hit) { | |
471 | st->hand_state = TLS_ST_CW_CHANGE; | |
472 | return WRITE_TRAN_CONTINUE; | |
473 | } else { | |
474 | st->hand_state = TLS_ST_OK; | |
fe3a3291 | 475 | ossl_statem_set_in_init(s, 0); |
61ae935a MC |
476 | return WRITE_TRAN_CONTINUE; |
477 | } | |
478 | ||
479 | default: | |
480 | /* Shouldn't happen */ | |
481 | return WRITE_TRAN_ERROR; | |
482 | } | |
483 | } | |
484 | ||
485 | /* | |
486 | * Perform any pre work that needs to be done prior to sending a message from | |
487 | * the client to the server. | |
488 | */ | |
8481f583 | 489 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 490 | { |
d6f1a6e9 | 491 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
492 | |
493 | switch(st->hand_state) { | |
494 | case TLS_ST_CW_CLNT_HELLO: | |
495 | s->shutdown = 0; | |
496 | if (SSL_IS_DTLS(s)) { | |
497 | /* every DTLS ClientHello resets Finished MAC */ | |
498 | ssl3_init_finished_mac(s); | |
499 | } | |
500 | break; | |
501 | ||
502 | case TLS_ST_CW_CERT: | |
503 | return tls_prepare_client_certificate(s, wst); | |
504 | ||
505 | case TLS_ST_CW_CHANGE: | |
506 | if (SSL_IS_DTLS(s)) { | |
507 | if (s->hit) { | |
508 | /* | |
509 | * We're into the last flight so we don't retransmit these | |
510 | * messages unless we need to. | |
511 | */ | |
512 | st->use_timer = 0; | |
513 | } | |
514 | #ifndef OPENSSL_NO_SCTP | |
515 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
516 | return dtls_wait_for_dry(s); | |
517 | #endif | |
518 | } | |
519 | return WORK_FINISHED_CONTINUE; | |
520 | ||
521 | case TLS_ST_OK: | |
522 | return tls_finish_handshake(s, wst); | |
523 | ||
524 | default: | |
525 | /* No pre work to be done */ | |
526 | break; | |
527 | } | |
528 | ||
529 | return WORK_FINISHED_CONTINUE; | |
530 | } | |
531 | ||
532 | /* | |
533 | * Perform any work that needs to be done after sending a message from the | |
534 | * client to the server. | |
535 | */ | |
8481f583 | 536 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 537 | { |
d6f1a6e9 | 538 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
539 | |
540 | s->init_num = 0; | |
541 | ||
542 | switch(st->hand_state) { | |
543 | case TLS_ST_CW_CLNT_HELLO: | |
544 | if (SSL_IS_DTLS(s) && s->d1->cookie_len > 0 && statem_flush(s) != 1) | |
545 | return WORK_MORE_A; | |
546 | #ifndef OPENSSL_NO_SCTP | |
547 | /* Disable buffering for SCTP */ | |
548 | if (!SSL_IS_DTLS(s) || !BIO_dgram_is_sctp(SSL_get_wbio(s))) { | |
549 | #endif | |
550 | /* | |
551 | * turn on buffering for the next lot of output | |
552 | */ | |
553 | if (s->bbio != s->wbio) | |
554 | s->wbio = BIO_push(s->bbio, s->wbio); | |
555 | #ifndef OPENSSL_NO_SCTP | |
556 | } | |
557 | #endif | |
558 | if (SSL_IS_DTLS(s)) { | |
559 | /* Treat the next message as the first packet */ | |
560 | s->first_packet = 1; | |
561 | } | |
562 | break; | |
563 | ||
564 | case TLS_ST_CW_KEY_EXCH: | |
565 | if (tls_client_key_exchange_post_work(s) == 0) | |
566 | return WORK_ERROR; | |
567 | break; | |
568 | ||
569 | case TLS_ST_CW_CHANGE: | |
570 | s->session->cipher = s->s3->tmp.new_cipher; | |
571 | #ifdef OPENSSL_NO_COMP | |
572 | s->session->compress_meth = 0; | |
573 | #else | |
574 | if (s->s3->tmp.new_compression == NULL) | |
575 | s->session->compress_meth = 0; | |
576 | else | |
577 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
578 | #endif | |
579 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
580 | return WORK_ERROR; | |
581 | ||
582 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
583 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
584 | return WORK_ERROR; | |
585 | ||
586 | if (SSL_IS_DTLS(s)) { | |
587 | #ifndef OPENSSL_NO_SCTP | |
588 | if (s->hit) { | |
589 | /* | |
590 | * Change to new shared key of SCTP-Auth, will be ignored if | |
591 | * no SCTP used. | |
592 | */ | |
593 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
594 | 0, NULL); | |
595 | } | |
596 | #endif | |
597 | ||
598 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
599 | } | |
600 | break; | |
601 | ||
602 | case TLS_ST_CW_FINISHED: | |
603 | #ifndef OPENSSL_NO_SCTP | |
604 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
605 | /* | |
606 | * Change to new shared key of SCTP-Auth, will be ignored if | |
607 | * no SCTP used. | |
608 | */ | |
609 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
610 | 0, NULL); | |
611 | } | |
612 | #endif | |
613 | if (statem_flush(s) != 1) | |
614 | return WORK_MORE_B; | |
61ae935a MC |
615 | break; |
616 | ||
617 | default: | |
618 | /* No post work to be done */ | |
619 | break; | |
620 | } | |
621 | ||
622 | return WORK_FINISHED_CONTINUE; | |
623 | } | |
624 | ||
625 | /* | |
626 | * Construct a message to be sent from the client to the server. | |
627 | * | |
628 | * Valid return values are: | |
629 | * 1: Success | |
630 | * 0: Error | |
631 | */ | |
8481f583 | 632 | int ossl_statem_client_construct_message(SSL *s) |
61ae935a | 633 | { |
d6f1a6e9 | 634 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
635 | |
636 | switch(st->hand_state) { | |
637 | case TLS_ST_CW_CLNT_HELLO: | |
638 | return tls_construct_client_hello(s); | |
639 | ||
640 | case TLS_ST_CW_CERT: | |
641 | return tls_construct_client_certificate(s); | |
642 | ||
643 | case TLS_ST_CW_KEY_EXCH: | |
644 | return tls_construct_client_key_exchange(s); | |
645 | ||
646 | case TLS_ST_CW_CERT_VRFY: | |
647 | return tls_construct_client_verify(s); | |
648 | ||
649 | case TLS_ST_CW_CHANGE: | |
650 | if (SSL_IS_DTLS(s)) | |
651 | return dtls_construct_change_cipher_spec(s); | |
652 | else | |
653 | return tls_construct_change_cipher_spec(s); | |
654 | ||
655 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
656 | case TLS_ST_CW_NEXT_PROTO: | |
657 | return tls_construct_next_proto(s); | |
658 | #endif | |
659 | case TLS_ST_CW_FINISHED: | |
660 | return tls_construct_finished(s, | |
661 | s->method-> | |
662 | ssl3_enc->client_finished_label, | |
663 | s->method-> | |
664 | ssl3_enc->client_finished_label_len); | |
665 | ||
666 | default: | |
667 | /* Shouldn't happen */ | |
668 | break; | |
669 | } | |
670 | ||
671 | return 0; | |
672 | } | |
673 | ||
674 | /* | |
675 | * Returns the maximum allowed length for the current message that we are | |
676 | * reading. Excludes the message header. | |
677 | */ | |
8481f583 | 678 | unsigned long ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 679 | { |
d6f1a6e9 | 680 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
681 | |
682 | switch(st->hand_state) { | |
683 | case TLS_ST_CR_SRVR_HELLO: | |
684 | return SERVER_HELLO_MAX_LENGTH; | |
685 | ||
686 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: | |
687 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
688 | ||
689 | case TLS_ST_CR_CERT: | |
690 | return s->max_cert_list; | |
691 | ||
692 | case TLS_ST_CR_CERT_STATUS: | |
693 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
694 | ||
695 | case TLS_ST_CR_KEY_EXCH: | |
696 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
697 | ||
698 | case TLS_ST_CR_CERT_REQ: | |
057b6f79 MC |
699 | /* Set to s->max_cert_list for compatibility with previous releases. |
700 | * In practice these messages can get quite long if servers are | |
701 | * configured to provide a long list of acceptable CAs | |
702 | */ | |
703 | return s->max_cert_list; | |
61ae935a MC |
704 | |
705 | case TLS_ST_CR_SRVR_DONE: | |
706 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
707 | ||
708 | case TLS_ST_CR_CHANGE: | |
709 | return CCS_MAX_LENGTH; | |
710 | ||
711 | case TLS_ST_CR_SESSION_TICKET: | |
712 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
713 | ||
714 | case TLS_ST_CR_FINISHED: | |
715 | return FINISHED_MAX_LENGTH; | |
716 | ||
717 | default: | |
718 | /* Shouldn't happen */ | |
719 | break; | |
720 | } | |
721 | ||
722 | return 0; | |
723 | } | |
724 | ||
725 | /* | |
726 | * Process a message that the client has been received from the server. | |
727 | */ | |
8481f583 | 728 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 729 | { |
d6f1a6e9 | 730 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
731 | |
732 | switch(st->hand_state) { | |
733 | case TLS_ST_CR_SRVR_HELLO: | |
734 | return tls_process_server_hello(s, pkt); | |
735 | ||
736 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: | |
737 | return dtls_process_hello_verify(s, pkt); | |
738 | ||
739 | case TLS_ST_CR_CERT: | |
740 | return tls_process_server_certificate(s, pkt); | |
741 | ||
742 | case TLS_ST_CR_CERT_STATUS: | |
743 | return tls_process_cert_status(s, pkt); | |
744 | ||
745 | case TLS_ST_CR_KEY_EXCH: | |
746 | return tls_process_key_exchange(s, pkt); | |
747 | ||
748 | case TLS_ST_CR_CERT_REQ: | |
749 | return tls_process_certificate_request(s, pkt); | |
750 | ||
751 | case TLS_ST_CR_SRVR_DONE: | |
752 | return tls_process_server_done(s, pkt); | |
753 | ||
754 | case TLS_ST_CR_CHANGE: | |
755 | return tls_process_change_cipher_spec(s, pkt); | |
756 | ||
757 | case TLS_ST_CR_SESSION_TICKET: | |
758 | return tls_process_new_session_ticket(s, pkt); | |
759 | ||
760 | case TLS_ST_CR_FINISHED: | |
761 | return tls_process_finished(s, pkt); | |
762 | ||
763 | default: | |
764 | /* Shouldn't happen */ | |
765 | break; | |
766 | } | |
767 | ||
768 | return MSG_PROCESS_ERROR; | |
769 | } | |
770 | ||
771 | /* | |
772 | * Perform any further processing required following the receipt of a message | |
773 | * from the server | |
774 | */ | |
8481f583 | 775 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 776 | { |
d6f1a6e9 | 777 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
778 | |
779 | switch(st->hand_state) { | |
780 | #ifndef OPENSSL_NO_SCTP | |
781 | case TLS_ST_CR_SRVR_DONE: | |
782 | /* We only get here if we are using SCTP and we are renegotiating */ | |
783 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) { | |
784 | s->s3->in_read_app_data = 2; | |
785 | s->rwstate = SSL_READING; | |
786 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
787 | BIO_set_retry_read(SSL_get_rbio(s)); | |
fe3a3291 | 788 | ossl_statem_set_sctp_read_sock(s, 1); |
61ae935a MC |
789 | return WORK_MORE_A; |
790 | } | |
fe3a3291 | 791 | ossl_statem_set_sctp_read_sock(s, 0); |
61ae935a MC |
792 | return WORK_FINISHED_STOP; |
793 | #endif | |
794 | ||
61ae935a MC |
795 | default: |
796 | break; | |
797 | } | |
798 | ||
799 | /* Shouldn't happen */ | |
800 | return WORK_ERROR; | |
801 | } | |
802 | ||
d45ba43d MC |
803 | /* |
804 | * Work out what version we should be using for the initial ClientHello if | |
805 | * the version is currently set to (D)TLS_ANY_VERSION. | |
806 | * Returns 1 on success | |
807 | * Returns 0 on error | |
808 | */ | |
809 | static int ssl_set_version(SSL *s) | |
810 | { | |
811 | unsigned long mask, options = s->options; | |
812 | ||
813 | if (s->method->version == TLS_ANY_VERSION) { | |
814 | /* | |
815 | * SSL_OP_NO_X disables all protocols above X *if* there are | |
816 | * some protocols below X enabled. This is required in order | |
817 | * to maintain "version capability" vector contiguous. So | |
818 | * that if application wants to disable TLS1.0 in favour of | |
819 | * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the | |
820 | * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3. | |
821 | */ | |
822 | mask = SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1 | |
823 | #if !defined(OPENSSL_NO_SSL3) | |
824 | | SSL_OP_NO_SSLv3 | |
825 | #endif | |
826 | ; | |
827 | #if !defined(OPENSSL_NO_TLS1_2_CLIENT) | |
828 | if (options & SSL_OP_NO_TLSv1_2) { | |
829 | if ((options & mask) != mask) { | |
830 | s->version = TLS1_1_VERSION; | |
831 | } else { | |
832 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE); | |
833 | return 0; | |
834 | } | |
835 | } else { | |
836 | s->version = TLS1_2_VERSION; | |
837 | } | |
838 | #else | |
839 | if ((options & mask) == mask) { | |
840 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE); | |
841 | return 0; | |
842 | } | |
843 | s->version = TLS1_1_VERSION; | |
844 | #endif | |
845 | ||
846 | mask &= ~SSL_OP_NO_TLSv1_1; | |
847 | if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask) | |
848 | s->version = TLS1_VERSION; | |
849 | mask &= ~SSL_OP_NO_TLSv1; | |
850 | #if !defined(OPENSSL_NO_SSL3) | |
851 | if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask) | |
852 | s->version = SSL3_VERSION; | |
853 | #endif | |
854 | ||
7946ab33 KR |
855 | if (s->max_proto_version != 0 && (s->version > s->max_proto_version)) |
856 | s->version = s->max_proto_version; | |
857 | if (s->version < s->min_proto_version) | |
858 | { | |
859 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE); | |
860 | return 0; | |
861 | } | |
862 | ||
d45ba43d MC |
863 | if (s->version != TLS1_2_VERSION && tls1_suiteb(s)) { |
864 | SSLerr(SSL_F_SSL_SET_VERSION, | |
865 | SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE); | |
866 | return 0; | |
867 | } | |
868 | ||
869 | if (s->version == SSL3_VERSION && FIPS_mode()) { | |
870 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); | |
871 | return 0; | |
872 | } | |
873 | ||
874 | } else if (s->method->version == DTLS_ANY_VERSION) { | |
7946ab33 KR |
875 | int max_version = DTLS_MAX_VERSION; |
876 | int min_version = DTLS_MIN_VERSION; | |
877 | ||
878 | if (s->max_proto_version != 0) | |
879 | max_version = s->max_proto_version; | |
880 | if (s->min_proto_version != 0) | |
881 | min_version = s->min_proto_version; | |
882 | ||
d45ba43d | 883 | /* If DTLS 1.2 disabled correct the version number */ |
7946ab33 KR |
884 | if (options & SSL_OP_NO_DTLSv1_2 |
885 | || DTLS_VERSION_GT(DTLS1_2_VERSION, max_version)) { | |
d45ba43d MC |
886 | if (tls1_suiteb(s)) { |
887 | SSLerr(SSL_F_SSL_SET_VERSION, | |
888 | SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE); | |
889 | return 0; | |
890 | } | |
891 | /* | |
892 | * Disabling all versions is silly: return an error. | |
893 | */ | |
7946ab33 KR |
894 | if (options & SSL_OP_NO_DTLSv1 |
895 | || DTLS_VERSION_GT(min_version, DTLS1_VERSION)) { | |
d45ba43d MC |
896 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_WRONG_SSL_VERSION); |
897 | return 0; | |
898 | } | |
899 | /* | |
900 | * Update method so we don't use any DTLS 1.2 features. | |
901 | */ | |
902 | s->method = DTLSv1_client_method(); | |
903 | s->version = DTLS1_VERSION; | |
904 | } else { | |
905 | /* | |
906 | * We only support one version: update method | |
907 | */ | |
7946ab33 KR |
908 | if (options & SSL_OP_NO_DTLSv1 |
909 | || DTLS_VERSION_GE(min_version, DTLS1_2_VERSION)) | |
d45ba43d MC |
910 | s->method = DTLSv1_2_client_method(); |
911 | s->version = DTLS1_2_VERSION; | |
912 | } | |
913 | } | |
914 | ||
915 | s->client_version = s->version; | |
916 | ||
917 | return 1; | |
918 | } | |
919 | ||
b9908bf9 | 920 | int tls_construct_client_hello(SSL *s) |
0f113f3e MC |
921 | { |
922 | unsigned char *buf; | |
923 | unsigned char *p, *d; | |
924 | int i; | |
925 | unsigned long l; | |
926 | int al = 0; | |
09b6c2ef | 927 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
928 | int j; |
929 | SSL_COMP *comp; | |
930 | #endif | |
b9908bf9 | 931 | SSL_SESSION *sess = s->session; |
0f113f3e MC |
932 | |
933 | buf = (unsigned char *)s->init_buf->data; | |
0f113f3e | 934 | |
b9908bf9 MC |
935 | /* Work out what SSL/TLS/DTLS version to use */ |
936 | if (ssl_set_version(s) == 0) | |
937 | goto err; | |
0f113f3e | 938 | |
b9908bf9 | 939 | if ((sess == NULL) || (sess->ssl_version != s->version) || |
0f113f3e | 940 | /* |
b9908bf9 MC |
941 | * In the case of EAP-FAST, we can have a pre-shared |
942 | * "ticket" without a session ID. | |
0f113f3e | 943 | */ |
b9908bf9 MC |
944 | (!sess->session_id_length && !sess->tlsext_tick) || |
945 | (sess->not_resumable)) { | |
946 | if (!ssl_get_new_session(s, 0)) | |
e1b568dd | 947 | goto err; |
b9908bf9 MC |
948 | } |
949 | /* else use the pre-loaded session */ | |
0f113f3e | 950 | |
b9908bf9 | 951 | p = s->s3->client_random; |
0f113f3e | 952 | |
b9908bf9 MC |
953 | /* |
954 | * for DTLS if client_random is initialized, reuse it, we are | |
955 | * required to use same upon reply to HelloVerify | |
956 | */ | |
957 | if (SSL_IS_DTLS(s)) { | |
958 | size_t idx; | |
959 | i = 1; | |
960 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
961 | if (p[idx]) { | |
962 | i = 0; | |
963 | break; | |
0f113f3e | 964 | } |
0f113f3e | 965 | } |
b9908bf9 MC |
966 | } else |
967 | i = 1; | |
0f113f3e | 968 | |
b9908bf9 MC |
969 | if (i && ssl_fill_hello_random(s, 0, p, |
970 | sizeof(s->s3->client_random)) <= 0) | |
971 | goto err; | |
972 | ||
973 | /* Do the message type and length last */ | |
974 | d = p = ssl_handshake_start(s); | |
975 | ||
976 | /*- | |
977 | * version indicates the negotiated version: for example from | |
978 | * an SSLv2/v3 compatible client hello). The client_version | |
979 | * field is the maximum version we permit and it is also | |
980 | * used in RSA encrypted premaster secrets. Some servers can | |
981 | * choke if we initially report a higher version then | |
982 | * renegotiate to a lower one in the premaster secret. This | |
983 | * didn't happen with TLS 1.0 as most servers supported it | |
984 | * but it can with TLS 1.1 or later if the server only supports | |
985 | * 1.0. | |
986 | * | |
987 | * Possible scenario with previous logic: | |
988 | * 1. Client hello indicates TLS 1.2 | |
989 | * 2. Server hello says TLS 1.0 | |
990 | * 3. RSA encrypted premaster secret uses 1.2. | |
991 | * 4. Handhaked proceeds using TLS 1.0. | |
992 | * 5. Server sends hello request to renegotiate. | |
993 | * 6. Client hello indicates TLS v1.0 as we now | |
994 | * know that is maximum server supports. | |
995 | * 7. Server chokes on RSA encrypted premaster secret | |
996 | * containing version 1.0. | |
997 | * | |
998 | * For interoperability it should be OK to always use the | |
999 | * maximum version we support in client hello and then rely | |
1000 | * on the checking of version to ensure the servers isn't | |
1001 | * being inconsistent: for example initially negotiating with | |
1002 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
1003 | * client_version in client hello and not resetting it to | |
1004 | * the negotiated version. | |
1005 | */ | |
1006 | *(p++) = s->client_version >> 8; | |
1007 | *(p++) = s->client_version & 0xff; | |
1008 | ||
1009 | /* Random stuff */ | |
1010 | memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); | |
1011 | p += SSL3_RANDOM_SIZE; | |
1012 | ||
1013 | /* Session ID */ | |
1014 | if (s->new_session) | |
1015 | i = 0; | |
1016 | else | |
1017 | i = s->session->session_id_length; | |
1018 | *(p++) = i; | |
1019 | if (i != 0) { | |
1020 | if (i > (int)sizeof(s->session->session_id)) { | |
1021 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
1022 | goto err; | |
0f113f3e | 1023 | } |
b9908bf9 MC |
1024 | memcpy(p, s->session->session_id, i); |
1025 | p += i; | |
1026 | } | |
0f113f3e | 1027 | |
b9908bf9 MC |
1028 | /* cookie stuff for DTLS */ |
1029 | if (SSL_IS_DTLS(s)) { | |
1030 | if (s->d1->cookie_len > sizeof(s->d1->cookie)) { | |
1031 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
1032 | goto err; |
1033 | } | |
b9908bf9 MC |
1034 | *(p++) = s->d1->cookie_len; |
1035 | memcpy(p, s->d1->cookie, s->d1->cookie_len); | |
1036 | p += s->d1->cookie_len; | |
1037 | } | |
1038 | ||
1039 | /* Ciphers supported */ | |
1040 | i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2])); | |
1041 | if (i == 0) { | |
1042 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); | |
1043 | goto err; | |
1044 | } | |
800e1cd9 | 1045 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
b9908bf9 MC |
1046 | /* |
1047 | * Some servers hang if client hello > 256 bytes as hack workaround | |
1048 | * chop number of supported ciphers to keep it well below this if we | |
1049 | * use TLS v1.2 | |
1050 | */ | |
1051 | if (TLS1_get_version(s) >= TLS1_2_VERSION | |
1052 | && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) | |
1053 | i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
0f113f3e | 1054 | #endif |
b9908bf9 MC |
1055 | s2n(i, p); |
1056 | p += i; | |
0f113f3e | 1057 | |
b9908bf9 | 1058 | /* COMPRESSION */ |
09b6c2ef | 1059 | #ifdef OPENSSL_NO_COMP |
b9908bf9 | 1060 | *(p++) = 1; |
09b6c2ef | 1061 | #else |
566dda07 | 1062 | |
b9908bf9 MC |
1063 | if (!ssl_allow_compression(s) || !s->ctx->comp_methods) |
1064 | j = 0; | |
1065 | else | |
1066 | j = sk_SSL_COMP_num(s->ctx->comp_methods); | |
1067 | *(p++) = 1 + j; | |
1068 | for (i = 0; i < j; i++) { | |
1069 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
1070 | *(p++) = comp->id; | |
1071 | } | |
09b6c2ef | 1072 | #endif |
b9908bf9 | 1073 | *(p++) = 0; /* Add the NULL method */ |
761772d7 | 1074 | |
b9908bf9 MC |
1075 | /* TLS extensions */ |
1076 | if (ssl_prepare_clienthello_tlsext(s) <= 0) { | |
1077 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); | |
1078 | goto err; | |
1079 | } | |
1080 | if ((p = | |
1081 | ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH, | |
1082 | &al)) == NULL) { | |
1083 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1084 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
1085 | goto err; | |
1086 | } | |
0f113f3e | 1087 | |
b9908bf9 MC |
1088 | l = p - d; |
1089 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) { | |
1090 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
1091 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
1092 | goto err; | |
0f113f3e MC |
1093 | } |
1094 | ||
b9908bf9 | 1095 | return 1; |
0f113f3e | 1096 | err: |
fe3a3291 | 1097 | ossl_statem_set_error(s); |
b9908bf9 | 1098 | return 0; |
0f113f3e | 1099 | } |
d02b48c6 | 1100 | |
be3583fa | 1101 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 MC |
1102 | { |
1103 | int al; | |
1104 | unsigned int cookie_len; | |
1105 | PACKET cookiepkt; | |
1106 | ||
1107 | if (!PACKET_forward(pkt, 2) | |
1108 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { | |
1109 | al = SSL_AD_DECODE_ERROR; | |
1110 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1111 | goto f_err; | |
1112 | } | |
1113 | ||
1114 | cookie_len = PACKET_remaining(&cookiepkt); | |
1115 | if (cookie_len > sizeof(s->d1->cookie)) { | |
1116 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1117 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG); | |
1118 | goto f_err; | |
1119 | } | |
1120 | ||
1121 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
1122 | al = SSL_AD_DECODE_ERROR; | |
1123 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1124 | goto f_err; | |
1125 | } | |
1126 | s->d1->cookie_len = cookie_len; | |
1127 | ||
1128 | return MSG_PROCESS_FINISHED_READING; | |
1129 | f_err: | |
1130 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1131 | ossl_statem_set_error(s); |
8ba708e5 MC |
1132 | return MSG_PROCESS_ERROR; |
1133 | } | |
1134 | ||
be3583fa | 1135 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1136 | { |
1137 | STACK_OF(SSL_CIPHER) *sk; | |
1138 | const SSL_CIPHER *c; | |
73999b62 | 1139 | PACKET session_id; |
b9908bf9 MC |
1140 | size_t session_id_len; |
1141 | unsigned char *cipherchars; | |
1142 | int i, al = SSL_AD_INTERNAL_ERROR; | |
1143 | unsigned int compression; | |
1144 | #ifndef OPENSSL_NO_COMP | |
1145 | SSL_COMP *comp; | |
1146 | #endif | |
1147 | ||
13c9bb3e | 1148 | if (s->method->version == TLS_ANY_VERSION) { |
50932c4a | 1149 | unsigned int sversion; |
7946ab33 KR |
1150 | int max_version = TLS_MAX_VERSION; |
1151 | ||
1152 | if (s->max_proto_version != 0) | |
1153 | max_version = s->max_proto_version; | |
50932c4a | 1154 | |
73999b62 | 1155 | if (!PACKET_get_net_2(pkt, &sversion)) { |
50932c4a | 1156 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1157 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1158 | goto f_err; |
1159 | } | |
13c9bb3e MC |
1160 | |
1161 | #if TLS_MAX_VERSION != TLS1_2_VERSION | |
1162 | #error Code needs updating for new TLS version | |
1163 | #endif | |
1164 | #ifndef OPENSSL_NO_SSL3 | |
7946ab33 KR |
1165 | if ((sversion == SSL3_VERSION) && !(s->options & SSL_OP_NO_SSLv3) && |
1166 | (s->min_proto_version <= SSL3_VERSION) && | |
1167 | (max_version >= SSL3_VERSION)) { | |
13c9bb3e | 1168 | if (FIPS_mode()) { |
b9908bf9 | 1169 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
13c9bb3e | 1170 | SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); |
d45ba43d MC |
1171 | al = SSL_AD_PROTOCOL_VERSION; |
1172 | goto f_err; | |
13c9bb3e MC |
1173 | } |
1174 | s->method = SSLv3_client_method(); | |
1175 | } else | |
1176 | #endif | |
7946ab33 KR |
1177 | if ((sversion == TLS1_VERSION) && !(s->options & SSL_OP_NO_TLSv1) && |
1178 | (s->min_proto_version <= TLS1_VERSION) && | |
1179 | (max_version >= TLS1_VERSION)) { | |
13c9bb3e MC |
1180 | s->method = TLSv1_client_method(); |
1181 | } else if ((sversion == TLS1_1_VERSION) && | |
7946ab33 KR |
1182 | !(s->options & SSL_OP_NO_TLSv1_1) && |
1183 | (s->min_proto_version <= TLS1_1_VERSION) && | |
1184 | (max_version >= TLS1_1_VERSION)) { | |
13c9bb3e MC |
1185 | s->method = TLSv1_1_client_method(); |
1186 | } else if ((sversion == TLS1_2_VERSION) && | |
7946ab33 KR |
1187 | !(s->options & SSL_OP_NO_TLSv1_2) && |
1188 | (s->min_proto_version <= TLS1_2_VERSION) && | |
1189 | (max_version >= TLS1_2_VERSION)) { | |
13c9bb3e MC |
1190 | s->method = TLSv1_2_client_method(); |
1191 | } else { | |
b9908bf9 | 1192 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); |
d45ba43d MC |
1193 | al = SSL_AD_PROTOCOL_VERSION; |
1194 | goto f_err; | |
13c9bb3e MC |
1195 | } |
1196 | s->session->ssl_version = s->version = s->method->version; | |
1197 | ||
7946ab33 KR |
1198 | if ((s->version < s->min_proto_version) |
1199 | || !ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) { | |
b9908bf9 | 1200 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_VERSION_TOO_LOW); |
d45ba43d MC |
1201 | al = SSL_AD_PROTOCOL_VERSION; |
1202 | goto f_err; | |
13c9bb3e MC |
1203 | } |
1204 | } else if (s->method->version == DTLS_ANY_VERSION) { | |
0f113f3e | 1205 | /* Work out correct protocol version to use */ |
50932c4a MC |
1206 | unsigned int hversion; |
1207 | int options; | |
7946ab33 KR |
1208 | int max_version = DTLS_MAX_VERSION; |
1209 | int min_version = DTLS_MIN_VERSION; | |
1210 | ||
1211 | if (s->max_proto_version != 0) | |
1212 | max_version = s->max_proto_version; | |
1213 | if (s->min_proto_version != 0) | |
1214 | min_version = s->min_proto_version; | |
50932c4a | 1215 | |
73999b62 | 1216 | if (!PACKET_get_net_2(pkt, &hversion)) { |
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 | } | |
1221 | ||
1222 | options = s->options; | |
7946ab33 KR |
1223 | if (hversion == DTLS1_2_VERSION && !(options & SSL_OP_NO_DTLSv1_2) && |
1224 | DTLS_VERSION_LE(min_version, DTLS1_2_VERSION) && | |
1225 | DTLS_VERSION_GE(max_version, DTLS1_2_VERSION)) | |
0f113f3e MC |
1226 | s->method = DTLSv1_2_client_method(); |
1227 | else if (tls1_suiteb(s)) { | |
b9908bf9 | 1228 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1229 | SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE); |
1230 | s->version = hversion; | |
1231 | al = SSL_AD_PROTOCOL_VERSION; | |
1232 | goto f_err; | |
7946ab33 KR |
1233 | } else if (hversion == DTLS1_VERSION && !(options & SSL_OP_NO_DTLSv1) && |
1234 | DTLS_VERSION_LE(min_version, DTLS1_VERSION) && | |
1235 | DTLS_VERSION_GE(max_version, DTLS1_VERSION)) | |
0f113f3e MC |
1236 | s->method = DTLSv1_client_method(); |
1237 | else { | |
b9908bf9 | 1238 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); |
0f113f3e MC |
1239 | s->version = hversion; |
1240 | al = SSL_AD_PROTOCOL_VERSION; | |
1241 | goto f_err; | |
1242 | } | |
7322abf5 | 1243 | s->session->ssl_version = s->version = s->method->version; |
50932c4a MC |
1244 | } else { |
1245 | unsigned char *vers; | |
1246 | ||
73999b62 | 1247 | if (!PACKET_get_bytes(pkt, &vers, 2)) { |
50932c4a | 1248 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1249 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1250 | goto f_err; |
1251 | } | |
1252 | if ((vers[0] != (s->version >> 8)) | |
1253 | || (vers[1] != (s->version & 0xff))) { | |
b9908bf9 | 1254 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); |
50932c4a MC |
1255 | s->version = (s->version & 0xff00) | vers[1]; |
1256 | al = SSL_AD_PROTOCOL_VERSION; | |
1257 | goto f_err; | |
1258 | } | |
0f113f3e | 1259 | } |
0f113f3e MC |
1260 | |
1261 | /* load the server hello data */ | |
1262 | /* load the server random */ | |
73999b62 | 1263 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { |
50932c4a | 1264 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1265 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1266 | goto f_err; |
1267 | } | |
0f113f3e MC |
1268 | |
1269 | s->hit = 0; | |
1270 | ||
fc5ce51d | 1271 | /* Get the session-id. */ |
73999b62 | 1272 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { |
fc5ce51d | 1273 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 1274 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1275 | goto f_err; |
1276 | } | |
1277 | session_id_len = PACKET_remaining(&session_id); | |
1278 | if (session_id_len > sizeof s->session->session_id | |
1279 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
0f113f3e | 1280 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1281 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG); |
0f113f3e MC |
1282 | goto f_err; |
1283 | } | |
e481f9b9 | 1284 | |
73999b62 | 1285 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f0659bdb | 1286 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1287 | al = SSL_AD_DECODE_ERROR; |
1288 | goto f_err; | |
1289 | } | |
1290 | ||
0f113f3e | 1291 | /* |
6e3d0153 EK |
1292 | * Check if we can resume the session based on external pre-shared secret. |
1293 | * EAP-FAST (RFC 4851) supports two types of session resumption. | |
1294 | * Resumption based on server-side state works with session IDs. | |
1295 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1296 | * works by overriding the SessionTicket extension at the application | |
1297 | * layer, and does not send a session ID. (We do not know whether EAP-FAST | |
1298 | * servers would honour the session ID.) Therefore, the session ID alone | |
1299 | * is not a reliable indicator of session resumption, so we first check if | |
1300 | * we can resume, and later peek at the next handshake message to see if the | |
1301 | * server wants to resume. | |
0f113f3e | 1302 | */ |
6e3d0153 EK |
1303 | if (s->version >= TLS1_VERSION && s->tls_session_secret_cb && |
1304 | s->session->tlsext_tick) { | |
0f113f3e MC |
1305 | SSL_CIPHER *pref_cipher = NULL; |
1306 | s->session->master_key_length = sizeof(s->session->master_key); | |
1307 | if (s->tls_session_secret_cb(s, s->session->master_key, | |
1308 | &s->session->master_key_length, | |
1309 | NULL, &pref_cipher, | |
1310 | s->tls_session_secret_cb_arg)) { | |
1311 | s->session->cipher = pref_cipher ? | |
50932c4a | 1312 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars); |
6e3d0153 | 1313 | } else { |
b9908bf9 | 1314 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); |
6e3d0153 EK |
1315 | al = SSL_AD_INTERNAL_ERROR; |
1316 | goto f_err; | |
0f113f3e | 1317 | } |
50932c4a MC |
1318 | } |
1319 | ||
fc5ce51d EK |
1320 | if (session_id_len != 0 && session_id_len == s->session->session_id_length |
1321 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1322 | session_id_len) == 0) { | |
0f113f3e MC |
1323 | if (s->sid_ctx_length != s->session->sid_ctx_length |
1324 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { | |
1325 | /* actually a client application bug */ | |
1326 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1327 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1328 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1329 | goto f_err; | |
1330 | } | |
1331 | s->hit = 1; | |
6e3d0153 | 1332 | } else { |
0f113f3e | 1333 | /* |
6e3d0153 EK |
1334 | * If we were trying for session-id reuse but the server |
1335 | * didn't echo the ID, make a new SSL_SESSION. | |
1336 | * In the case of EAP-FAST and PAC, we do not send a session ID, | |
1337 | * so the PAC-based session secret is always preserved. It'll be | |
1338 | * overwritten if the server refuses resumption. | |
0f113f3e MC |
1339 | */ |
1340 | if (s->session->session_id_length > 0) { | |
1341 | if (!ssl_get_new_session(s, 0)) { | |
1342 | goto f_err; | |
1343 | } | |
1344 | } | |
50932c4a | 1345 | |
fc5ce51d EK |
1346 | s->session->session_id_length = session_id_len; |
1347 | /* session_id_len could be 0 */ | |
1348 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1349 | session_id_len); | |
0f113f3e | 1350 | } |
fc5ce51d | 1351 | |
50932c4a | 1352 | c = ssl_get_cipher_by_char(s, cipherchars); |
0f113f3e MC |
1353 | if (c == NULL) { |
1354 | /* unknown cipher */ | |
1355 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1356 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); |
0f113f3e MC |
1357 | goto f_err; |
1358 | } | |
1359 | /* Set version disabled mask now we know version */ | |
1360 | if (!SSL_USE_TLS1_2_CIPHERS(s)) | |
4d69f9e6 | 1361 | s->s3->tmp.mask_ssl = SSL_TLSV1_2; |
0f113f3e | 1362 | else |
4d69f9e6 | 1363 | s->s3->tmp.mask_ssl = 0; |
2b573382 DSH |
1364 | /* Skip TLS v1.0 ciphersuites if SSLv3 */ |
1365 | if ((c->algorithm_ssl & SSL_TLSV1) && s->version == SSL3_VERSION) | |
1366 | s->s3->tmp.mask_ssl |= SSL_TLSV1; | |
0f113f3e MC |
1367 | /* |
1368 | * If it is a disabled cipher we didn't send it in client hello, so | |
1369 | * return an error. | |
1370 | */ | |
1371 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
1372 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1373 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1374 | goto f_err; |
1375 | } | |
0f113f3e MC |
1376 | |
1377 | sk = ssl_get_ciphers_by_id(s); | |
1378 | i = sk_SSL_CIPHER_find(sk, c); | |
1379 | if (i < 0) { | |
1380 | /* we did not say we would use this cipher */ | |
1381 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1382 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1383 | goto f_err; |
1384 | } | |
1385 | ||
1386 | /* | |
1387 | * Depending on the session caching (internal/external), the cipher | |
1388 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1389 | * set and use it for comparison. | |
1390 | */ | |
1391 | if (s->session->cipher) | |
1392 | s->session->cipher_id = s->session->cipher->id; | |
1393 | if (s->hit && (s->session->cipher_id != c->id)) { | |
9e9858d1 | 1394 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1395 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
9e9858d1 RS |
1396 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
1397 | goto f_err; | |
0f113f3e MC |
1398 | } |
1399 | s->s3->tmp.new_cipher = c; | |
0f113f3e MC |
1400 | /* lets get the compression algorithm */ |
1401 | /* COMPRESSION */ | |
73999b62 | 1402 | if (!PACKET_get_1(pkt, &compression)) { |
f0659bdb | 1403 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1404 | al = SSL_AD_DECODE_ERROR; |
1405 | goto f_err; | |
1406 | } | |
09b6c2ef | 1407 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1408 | if (compression != 0) { |
0f113f3e | 1409 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1410 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1411 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1412 | goto f_err; | |
1413 | } | |
1414 | /* | |
1415 | * If compression is disabled we'd better not try to resume a session | |
1416 | * using compression. | |
1417 | */ | |
1418 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 1419 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
1420 | goto f_err; |
1421 | } | |
09b6c2ef | 1422 | #else |
fc5ce51d | 1423 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 1424 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1425 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1426 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
1427 | goto f_err; | |
1428 | } | |
fc5ce51d | 1429 | if (compression == 0) |
0f113f3e MC |
1430 | comp = NULL; |
1431 | else if (!ssl_allow_compression(s)) { | |
1432 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1433 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 1434 | goto f_err; |
fc5ce51d EK |
1435 | } else { |
1436 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1437 | } | |
0f113f3e | 1438 | |
fc5ce51d | 1439 | if (compression != 0 && comp == NULL) { |
0f113f3e | 1440 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1441 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1442 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1443 | goto f_err; | |
1444 | } else { | |
1445 | s->s3->tmp.new_compression = comp; | |
1446 | } | |
09b6c2ef | 1447 | #endif |
761772d7 | 1448 | |
0f113f3e | 1449 | /* TLS extensions */ |
73999b62 | 1450 | if (!ssl_parse_serverhello_tlsext(s, pkt)) { |
b9908bf9 | 1451 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT); |
0f113f3e MC |
1452 | goto err; |
1453 | } | |
0f113f3e | 1454 | |
73999b62 | 1455 | if (PACKET_remaining(pkt) != 0) { |
0f113f3e MC |
1456 | /* wrong packet length */ |
1457 | al = SSL_AD_DECODE_ERROR; | |
b9908bf9 | 1458 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH); |
0f113f3e MC |
1459 | goto f_err; |
1460 | } | |
1461 | ||
8723588e MC |
1462 | #ifndef OPENSSL_NO_SCTP |
1463 | if (SSL_IS_DTLS(s) && s->hit) { | |
1464 | unsigned char sctpauthkey[64]; | |
1465 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1466 | ||
1467 | /* | |
1468 | * Add new shared key for SCTP-Auth, will be ignored if | |
1469 | * no SCTP used. | |
1470 | */ | |
141eb8c6 MC |
1471 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1472 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1473 | |
1474 | if (SSL_export_keying_material(s, sctpauthkey, | |
1475 | sizeof(sctpauthkey), | |
1476 | labelbuffer, | |
1477 | sizeof(labelbuffer), NULL, 0, | |
1478 | 0) <= 0) | |
1479 | goto err; | |
1480 | ||
1481 | BIO_ctrl(SSL_get_wbio(s), | |
1482 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1483 | sizeof(sctpauthkey), sctpauthkey); | |
1484 | } | |
1485 | #endif | |
1486 | ||
b9908bf9 | 1487 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1488 | f_err: |
1489 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1490 | err: | |
fe3a3291 | 1491 | ossl_statem_set_error(s); |
b9908bf9 | 1492 | return MSG_PROCESS_ERROR; |
0f113f3e | 1493 | } |
d02b48c6 | 1494 | |
be3583fa | 1495 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1496 | { |
1497 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
1498 | unsigned long cert_list_len, cert_len; | |
1499 | X509 *x = NULL; | |
1500 | unsigned char *certstart, *certbytes; | |
1501 | STACK_OF(X509) *sk = NULL; | |
1502 | EVP_PKEY *pkey = NULL; | |
0f113f3e MC |
1503 | |
1504 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1505 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1506 | goto err; |
0f113f3e MC |
1507 | } |
1508 | ||
73999b62 MC |
1509 | if (!PACKET_get_net_3(pkt, &cert_list_len) |
1510 | || PACKET_remaining(pkt) != cert_list_len) { | |
0f113f3e | 1511 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1512 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1513 | goto f_err; |
1514 | } | |
73999b62 MC |
1515 | while (PACKET_remaining(pkt)) { |
1516 | if (!PACKET_get_net_3(pkt, &cert_len) | |
1517 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { | |
0f113f3e | 1518 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1519 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1520 | SSL_R_CERT_LENGTH_MISMATCH); |
1521 | goto f_err; | |
1522 | } | |
1523 | ||
df758a85 MC |
1524 | certstart = certbytes; |
1525 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1526 | if (x == NULL) { |
1527 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1528 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1529 | goto f_err; |
1530 | } | |
df758a85 | 1531 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1532 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1533 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1534 | SSL_R_CERT_LENGTH_MISMATCH); |
1535 | goto f_err; | |
1536 | } | |
1537 | if (!sk_X509_push(sk, x)) { | |
b9908bf9 | 1538 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1539 | goto err; |
0f113f3e MC |
1540 | } |
1541 | x = NULL; | |
0f113f3e MC |
1542 | } |
1543 | ||
1544 | i = ssl_verify_cert_chain(s, sk); | |
55a9a16f | 1545 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { |
0f113f3e | 1546 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1547 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1548 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1549 | goto f_err; | |
1550 | } | |
1551 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1552 | if (i > 1) { | |
b9908bf9 | 1553 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1554 | al = SSL_AD_HANDSHAKE_FAILURE; |
1555 | goto f_err; | |
1556 | } | |
1557 | ||
c34b0f99 | 1558 | s->session->peer_chain = sk; |
0f113f3e MC |
1559 | /* |
1560 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
1561 | * which we don't include in s3_srvr.c | |
1562 | */ | |
1563 | x = sk_X509_value(sk, 0); | |
1564 | sk = NULL; | |
1565 | /* | |
1566 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1567 | */ | |
1568 | ||
8382fd3a | 1569 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1570 | |
55a9a16f | 1571 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
1572 | x = NULL; |
1573 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1574 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1575 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1576 | goto f_err; | |
1577 | } | |
1578 | ||
1579 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1580 | if (i < 0) { |
0f113f3e MC |
1581 | x = NULL; |
1582 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1583 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1584 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1585 | goto f_err; | |
1586 | } | |
1587 | ||
55a9a16f | 1588 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); |
e44380a9 DB |
1589 | if (exp_idx >= 0 && i != exp_idx |
1590 | && (exp_idx != SSL_PKEY_GOST_EC || | |
1591 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256 | |
1592 | && i != SSL_PKEY_GOST01))) { | |
55a9a16f MC |
1593 | x = NULL; |
1594 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1595 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
55a9a16f MC |
1596 | SSL_R_WRONG_CERTIFICATE_TYPE); |
1597 | goto f_err; | |
0f113f3e | 1598 | } |
a273c6ee | 1599 | s->session->peer_type = i; |
55a9a16f MC |
1600 | |
1601 | X509_free(s->session->peer); | |
05f0fb9f | 1602 | X509_up_ref(x); |
55a9a16f | 1603 | s->session->peer = x; |
0f113f3e MC |
1604 | s->session->verify_result = s->verify_result; |
1605 | ||
1606 | x = NULL; | |
b9908bf9 | 1607 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1608 | goto done; |
1609 | ||
0f113f3e | 1610 | f_err: |
66696478 | 1611 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1612 | err: |
fe3a3291 | 1613 | ossl_statem_set_error(s); |
66696478 | 1614 | done: |
0f113f3e MC |
1615 | X509_free(x); |
1616 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1617 | return ret; |
0f113f3e | 1618 | } |
d02b48c6 | 1619 | |
be3583fa | 1620 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 1621 | { |
6e59a892 | 1622 | EVP_MD_CTX *md_ctx; |
192e4bbb | 1623 | int al, j; |
b9908bf9 MC |
1624 | long alg_k, alg_a; |
1625 | EVP_PKEY *pkey = NULL; | |
1626 | const EVP_MD *md = NULL; | |
1627 | #ifndef OPENSSL_NO_RSA | |
1628 | RSA *rsa = NULL; | |
1629 | #endif | |
b9908bf9 | 1630 | #ifndef OPENSSL_NO_EC |
61dd9f7a | 1631 | EVP_PKEY_CTX *pctx = NULL; |
b9908bf9 | 1632 | #endif |
73999b62 | 1633 | PACKET save_param_start, signature; |
b9908bf9 | 1634 | |
bfb0641f | 1635 | md_ctx = EVP_MD_CTX_new(); |
6e59a892 RL |
1636 | if (md_ctx == NULL) { |
1637 | al = SSL_AD_INTERNAL_ERROR; | |
1638 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
1639 | goto f_err; | |
1640 | } | |
b9908bf9 MC |
1641 | |
1642 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
1643 | ||
73999b62 | 1644 | save_param_start = *pkt; |
8d92c1f8 | 1645 | |
fb79abe3 | 1646 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
1647 | EVP_PKEY_free(s->s3->peer_tmp); |
1648 | s->s3->peer_tmp = NULL; | |
d02b48c6 | 1649 | #endif |
8d92c1f8 | 1650 | |
0f113f3e | 1651 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; |
d02b48c6 | 1652 | |
0f113f3e | 1653 | al = SSL_AD_DECODE_ERROR; |
f2be92b9 | 1654 | |
ddac1974 | 1655 | #ifndef OPENSSL_NO_PSK |
7689082b DSH |
1656 | /* PSK ciphersuites are preceded by an identity hint */ |
1657 | if (alg_k & SSL_PSK) { | |
32942870 | 1658 | PACKET psk_identity_hint; |
73999b62 | 1659 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { |
f0659bdb | 1660 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1661 | goto f_err; |
1662 | } | |
0f113f3e MC |
1663 | |
1664 | /* | |
1665 | * Store PSK identity hint for later use, hint is used in | |
1666 | * ssl3_send_client_key_exchange. Assume that the maximum length of | |
1667 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1668 | * identity. | |
1669 | */ | |
32942870 | 1670 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { |
0f113f3e | 1671 | al = SSL_AD_HANDSHAKE_FAILURE; |
b9908bf9 | 1672 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG); |
0f113f3e MC |
1673 | goto f_err; |
1674 | } | |
8098fc56 | 1675 | |
558ceae7 DSH |
1676 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1677 | OPENSSL_free(s->session->psk_identity_hint); | |
1678 | s->session->psk_identity_hint = NULL; | |
1679 | } else if (!PACKET_strndup(&psk_identity_hint, | |
32942870 EK |
1680 | &s->session->psk_identity_hint)) { |
1681 | al = SSL_AD_INTERNAL_ERROR; | |
1682 | goto f_err; | |
0f113f3e | 1683 | } |
7689082b DSH |
1684 | } |
1685 | ||
1686 | /* Nothing else to do for plain PSK or RSAPSK */ | |
1687 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
0f113f3e MC |
1688 | } else |
1689 | #endif /* !OPENSSL_NO_PSK */ | |
bbf431cb MC |
1690 | /* |
1691 | * Dummy "if" to ensure sane C code in the event of various OPENSSL_NO_* | |
1692 | * options | |
1693 | */ | |
1694 | if (0) { | |
1695 | } | |
edc032b5 | 1696 | #ifndef OPENSSL_NO_SRP |
bbf431cb | 1697 | else if (alg_k & SSL_kSRP) { |
32942870 | 1698 | PACKET prime, generator, salt, server_pub; |
73999b62 MC |
1699 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1700 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1701 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1702 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
f0659bdb | 1703 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1704 | goto f_err; |
1705 | } | |
0f113f3e | 1706 | |
32942870 EK |
1707 | if ((s->srp_ctx.N = |
1708 | BN_bin2bn(PACKET_data(&prime), | |
1709 | PACKET_remaining(&prime), NULL)) == NULL | |
1710 | || (s->srp_ctx.g = | |
1711 | BN_bin2bn(PACKET_data(&generator), | |
1712 | PACKET_remaining(&generator), NULL)) == NULL | |
1713 | || (s->srp_ctx.s = | |
1714 | BN_bin2bn(PACKET_data(&salt), | |
1715 | PACKET_remaining(&salt), NULL)) == NULL | |
1716 | || (s->srp_ctx.B = | |
1717 | BN_bin2bn(PACKET_data(&server_pub), | |
1718 | PACKET_remaining(&server_pub), NULL)) == NULL) { | |
f0659bdb | 1719 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB); |
0f113f3e MC |
1720 | goto err; |
1721 | } | |
0f113f3e MC |
1722 | |
1723 | if (!srp_verify_server_param(s, &al)) { | |
b9908bf9 | 1724 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS); |
0f113f3e MC |
1725 | goto f_err; |
1726 | } | |
0989790b | 1727 | |
edc032b5 | 1728 | /* We must check if there is a certificate */ |
8df53b7a | 1729 | if (alg_a & (SSL_aRSA|SSL_aDSS)) |
8382fd3a | 1730 | pkey = X509_get0_pubkey(s->session->peer); |
0f113f3e | 1731 | } |
361a1191 | 1732 | #endif /* !OPENSSL_NO_SRP */ |
bc36ee62 | 1733 | #ifndef OPENSSL_NO_DH |
7689082b | 1734 | else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
32942870 | 1735 | PACKET prime, generator, pub_key; |
0f113f3e | 1736 | |
fb79abe3 DSH |
1737 | DH *dh; |
1738 | ||
73999b62 MC |
1739 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1740 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1741 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
f0659bdb | 1742 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1743 | goto f_err; |
1744 | } | |
0f113f3e | 1745 | |
fb79abe3 DSH |
1746 | s->s3->peer_tmp = EVP_PKEY_new(); |
1747 | dh = DH_new(); | |
1748 | ||
1749 | if (s->s3->peer_tmp == NULL || dh == NULL) { | |
1750 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
1751 | DH_free(dh); | |
1752 | goto err; | |
1753 | } | |
1754 | ||
1755 | if (EVP_PKEY_assign_DH(s->s3->peer_tmp, dh) == 0) { | |
1756 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
1757 | DH_free(dh); | |
0f113f3e MC |
1758 | goto err; |
1759 | } | |
0f113f3e | 1760 | |
32942870 EK |
1761 | if ((dh->p = BN_bin2bn(PACKET_data(&prime), |
1762 | PACKET_remaining(&prime), NULL)) == NULL | |
1763 | || (dh->g = BN_bin2bn(PACKET_data(&generator), | |
1764 | PACKET_remaining(&generator), NULL)) == NULL | |
1765 | || (dh->pub_key = | |
1766 | BN_bin2bn(PACKET_data(&pub_key), | |
1767 | PACKET_remaining(&pub_key), NULL)) == NULL) { | |
f0659bdb | 1768 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB); |
0f113f3e MC |
1769 | goto err; |
1770 | } | |
0f113f3e | 1771 | |
32942870 | 1772 | if (BN_is_zero(dh->p) || BN_is_zero(dh->g) || BN_is_zero(dh->pub_key)) { |
f0659bdb | 1773 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_DH_VALUE); |
61e72d76 GL |
1774 | goto f_err; |
1775 | } | |
1776 | ||
0f113f3e MC |
1777 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { |
1778 | al = SSL_AD_HANDSHAKE_FAILURE; | |
b9908bf9 | 1779 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL); |
0f113f3e MC |
1780 | goto f_err; |
1781 | } | |
8df53b7a | 1782 | if (alg_a & (SSL_aRSA|SSL_aDSS)) |
8382fd3a | 1783 | pkey = X509_get0_pubkey(s->session->peer); |
0f113f3e | 1784 | /* else anonymous DH, so no certificate or pkey. */ |
0f113f3e MC |
1785 | } |
1786 | #endif /* !OPENSSL_NO_DH */ | |
ea262260 | 1787 | |
10bf4fc2 | 1788 | #ifndef OPENSSL_NO_EC |
7689082b | 1789 | else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
32942870 EK |
1790 | PACKET encoded_pt; |
1791 | unsigned char *ecparams; | |
61dd9f7a | 1792 | int curve_nid; |
0f113f3e | 1793 | |
0f113f3e MC |
1794 | /* |
1795 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
32942870 | 1796 | * public key. For now we only support named (not generic) curves and |
8098fc56 | 1797 | * ECParameters in this case is just three bytes. |
0f113f3e | 1798 | */ |
73999b62 | 1799 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { |
f0659bdb | 1800 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
0f113f3e MC |
1801 | goto f_err; |
1802 | } | |
1803 | /* | |
1804 | * Check curve is one of our preferences, if not server has sent an | |
1805 | * invalid curve. ECParameters is 3 bytes. | |
1806 | */ | |
32942870 | 1807 | if (!tls1_check_curve(s, ecparams, 3)) { |
f0659bdb | 1808 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_CURVE); |
0f113f3e MC |
1809 | goto f_err; |
1810 | } | |
1811 | ||
61dd9f7a DSH |
1812 | curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2)); |
1813 | if (curve_nid == 0) { | |
0f113f3e | 1814 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1815 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
0f113f3e MC |
1816 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
1817 | goto f_err; | |
1818 | } | |
1819 | ||
61dd9f7a DSH |
1820 | /* Set up EVP_PKEY with named curve as parameters */ |
1821 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
1822 | if (pctx == NULL | |
1823 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
1824 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0 | |
1825 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
1826 | al = SSL_AD_INTERNAL_ERROR; | |
1827 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
1828 | goto f_err; | |
0f113f3e | 1829 | } |
61dd9f7a DSH |
1830 | EVP_PKEY_CTX_free(pctx); |
1831 | pctx = NULL; | |
0f113f3e | 1832 | |
73999b62 | 1833 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { |
f0659bdb | 1834 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
8098fc56 MC |
1835 | goto f_err; |
1836 | } | |
0f113f3e | 1837 | |
61dd9f7a DSH |
1838 | if (EC_KEY_oct2key(EVP_PKEY_get0_EC_KEY(s->s3->peer_tmp), |
1839 | PACKET_data(&encoded_pt), | |
cae41364 | 1840 | PACKET_remaining(&encoded_pt), NULL) == 0) { |
f0659bdb | 1841 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_ECPOINT); |
0f113f3e MC |
1842 | goto f_err; |
1843 | } | |
0f113f3e MC |
1844 | |
1845 | /* | |
1846 | * The ECC/TLS specification does not mention the use of DSA to sign | |
1847 | * ECParameters in the server key exchange message. We do support RSA | |
1848 | * and ECDSA. | |
1849 | */ | |
1850 | if (0) ; | |
1851 | # ifndef OPENSSL_NO_RSA | |
1852 | else if (alg_a & SSL_aRSA) | |
8382fd3a | 1853 | pkey = X509_get0_pubkey(s->session->peer); |
0f113f3e | 1854 | # endif |
10bf4fc2 | 1855 | # ifndef OPENSSL_NO_EC |
0f113f3e | 1856 | else if (alg_a & SSL_aECDSA) |
8382fd3a | 1857 | pkey = X509_get0_pubkey(s->session->peer); |
0f113f3e MC |
1858 | # endif |
1859 | /* else anonymous ECDH, so no certificate or pkey. */ | |
0f113f3e MC |
1860 | } else if (alg_k) { |
1861 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 1862 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
0f113f3e MC |
1863 | goto f_err; |
1864 | } | |
10bf4fc2 | 1865 | #endif /* !OPENSSL_NO_EC */ |
0f113f3e | 1866 | |
0f113f3e MC |
1867 | /* if it was signed, check the signature */ |
1868 | if (pkey != NULL) { | |
32942870 EK |
1869 | PACKET params; |
1870 | /* | |
1871 | * |pkt| now points to the beginning of the signature, so the difference | |
1872 | * equals the length of the parameters. | |
1873 | */ | |
1874 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
1875 | PACKET_remaining(&save_param_start) - | |
73999b62 | 1876 | PACKET_remaining(pkt))) { |
32942870 | 1877 | al = SSL_AD_INTERNAL_ERROR; |
f0659bdb | 1878 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
32942870 EK |
1879 | goto f_err; |
1880 | } | |
1881 | ||
0f113f3e | 1882 | if (SSL_USE_SIGALGS(s)) { |
32942870 | 1883 | unsigned char *sigalgs; |
0f113f3e | 1884 | int rv; |
73999b62 | 1885 | if (!PACKET_get_bytes(pkt, &sigalgs, 2)) { |
f0659bdb | 1886 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
0f113f3e MC |
1887 | goto f_err; |
1888 | } | |
32942870 | 1889 | rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey); |
0f113f3e MC |
1890 | if (rv == -1) |
1891 | goto err; | |
1892 | else if (rv == 0) { | |
1893 | goto f_err; | |
1894 | } | |
a2f9200f | 1895 | #ifdef SSL_DEBUG |
0f113f3e MC |
1896 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
1897 | #endif | |
192e4bbb DSH |
1898 | } else if (pkey->type == EVP_PKEY_RSA) { |
1899 | md = EVP_md5_sha1(); | |
32942870 | 1900 | } else { |
0f113f3e | 1901 | md = EVP_sha1(); |
32942870 | 1902 | } |
0f113f3e | 1903 | |
73999b62 MC |
1904 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
1905 | || PACKET_remaining(pkt) != 0) { | |
f0659bdb | 1906 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1907 | goto f_err; |
1908 | } | |
0f113f3e | 1909 | j = EVP_PKEY_size(pkey); |
8098fc56 | 1910 | if (j < 0) { |
b9908bf9 | 1911 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
8098fc56 MC |
1912 | goto f_err; |
1913 | } | |
0f113f3e MC |
1914 | |
1915 | /* | |
8098fc56 | 1916 | * Check signature length |
0f113f3e | 1917 | */ |
32942870 | 1918 | if (PACKET_remaining(&signature) > (size_t)j) { |
0f113f3e | 1919 | /* wrong packet length */ |
b9908bf9 | 1920 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH); |
0f113f3e MC |
1921 | goto f_err; |
1922 | } | |
6e59a892 RL |
1923 | if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0 |
1924 | || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]), | |
192e4bbb | 1925 | SSL3_RANDOM_SIZE) <= 0 |
6e59a892 | 1926 | || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]), |
192e4bbb | 1927 | SSL3_RANDOM_SIZE) <= 0 |
6e59a892 | 1928 | || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms), |
192e4bbb DSH |
1929 | PACKET_remaining(¶ms)) <= 0) { |
1930 | al = SSL_AD_INTERNAL_ERROR; | |
1931 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
1932 | goto f_err; | |
1933 | } | |
6e59a892 | 1934 | if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature), |
192e4bbb DSH |
1935 | PACKET_remaining(&signature), pkey) <= 0) { |
1936 | /* bad signature */ | |
1937 | al = SSL_AD_DECRYPT_ERROR; | |
1938 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
1939 | goto f_err; | |
0f113f3e MC |
1940 | } |
1941 | } else { | |
7689082b DSH |
1942 | /* aNULL, aSRP or PSK do not need public keys */ |
1943 | if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_PSK)) { | |
0f113f3e MC |
1944 | /* Might be wrong key type, check it */ |
1945 | if (ssl3_check_cert_and_algorithm(s)) | |
1946 | /* Otherwise this shouldn't happen */ | |
b9908bf9 | 1947 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
0f113f3e MC |
1948 | goto err; |
1949 | } | |
1950 | /* still data left over */ | |
73999b62 | 1951 | if (PACKET_remaining(pkt) != 0) { |
b9908bf9 | 1952 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
0f113f3e MC |
1953 | goto f_err; |
1954 | } | |
1955 | } | |
bfb0641f | 1956 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 1957 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1958 | f_err: |
1959 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1960 | err: | |
bc36ee62 | 1961 | #ifndef OPENSSL_NO_RSA |
d6407083 | 1962 | RSA_free(rsa); |
6b521df3 | 1963 | #endif |
10bf4fc2 | 1964 | #ifndef OPENSSL_NO_EC |
61dd9f7a | 1965 | EVP_PKEY_CTX_free(pctx); |
6b521df3 | 1966 | #endif |
bfb0641f | 1967 | EVP_MD_CTX_free(md_ctx); |
fe3a3291 | 1968 | ossl_statem_set_error(s); |
b9908bf9 | 1969 | return MSG_PROCESS_ERROR; |
0f113f3e | 1970 | } |
d02b48c6 | 1971 | |
be3583fa | 1972 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1973 | { |
1974 | int ret = MSG_PROCESS_ERROR; | |
1975 | unsigned int list_len, ctype_num, i, name_len; | |
1976 | X509_NAME *xn = NULL; | |
1977 | unsigned char *data; | |
1978 | unsigned char *namestart, *namebytes; | |
1979 | STACK_OF(X509_NAME) *ca_sk = NULL; | |
0f113f3e MC |
1980 | |
1981 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { | |
b9908bf9 | 1982 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1983 | goto err; |
1984 | } | |
1985 | ||
1986 | /* get the certificate types */ | |
73999b62 MC |
1987 | if (!PACKET_get_1(pkt, &ctype_num) |
1988 | || !PACKET_get_bytes(pkt, &data, ctype_num)) { | |
ac112332 | 1989 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1990 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
ac112332 MC |
1991 | goto err; |
1992 | } | |
b548a1f1 RS |
1993 | OPENSSL_free(s->cert->ctypes); |
1994 | s->cert->ctypes = NULL; | |
0f113f3e MC |
1995 | if (ctype_num > SSL3_CT_NUMBER) { |
1996 | /* If we exceed static buffer copy all to cert structure */ | |
1997 | s->cert->ctypes = OPENSSL_malloc(ctype_num); | |
1998 | if (s->cert->ctypes == NULL) { | |
b9908bf9 | 1999 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2000 | goto err; |
2001 | } | |
ac112332 | 2002 | memcpy(s->cert->ctypes, data, ctype_num); |
0f113f3e MC |
2003 | s->cert->ctype_num = (size_t)ctype_num; |
2004 | ctype_num = SSL3_CT_NUMBER; | |
2005 | } | |
2006 | for (i = 0; i < ctype_num; i++) | |
ac112332 MC |
2007 | s->s3->tmp.ctype[i] = data[i]; |
2008 | ||
0f113f3e | 2009 | if (SSL_USE_SIGALGS(s)) { |
73999b62 MC |
2010 | if (!PACKET_get_net_2(pkt, &list_len) |
2011 | || !PACKET_get_bytes(pkt, &data, list_len)) { | |
0f113f3e | 2012 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2013 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2014 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2015 | goto err; |
2016 | } | |
ac112332 | 2017 | |
0f113f3e MC |
2018 | /* Clear certificate digests and validity flags */ |
2019 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
d376e57d | 2020 | s->s3->tmp.md[i] = NULL; |
6383d316 | 2021 | s->s3->tmp.valid_flags[i] = 0; |
0f113f3e | 2022 | } |
ac112332 | 2023 | if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) { |
0f113f3e | 2024 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2025 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2026 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
2027 | goto err; | |
2028 | } | |
2029 | if (!tls1_process_sigalgs(s)) { | |
2030 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2031 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2032 | goto err; |
2033 | } | |
a0f63828 DSH |
2034 | } else { |
2035 | ssl_set_default_md(s); | |
0f113f3e MC |
2036 | } |
2037 | ||
2038 | /* get the CA RDNs */ | |
73999b62 MC |
2039 | if (!PACKET_get_net_2(pkt, &list_len) |
2040 | || PACKET_remaining(pkt) != list_len) { | |
0f113f3e | 2041 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2042 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2043 | goto err; |
2044 | } | |
2045 | ||
73999b62 MC |
2046 | while (PACKET_remaining(pkt)) { |
2047 | if (!PACKET_get_net_2(pkt, &name_len) | |
2048 | || !PACKET_get_bytes(pkt, &namebytes, name_len)) { | |
0f113f3e | 2049 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
2050 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
2051 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
2052 | goto err; |
2053 | } | |
2054 | ||
ac112332 | 2055 | namestart = namebytes; |
0f113f3e | 2056 | |
ac112332 MC |
2057 | if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes, |
2058 | name_len)) == NULL) { | |
3c33c6f6 | 2059 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2060 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); |
3c33c6f6 | 2061 | goto err; |
0f113f3e MC |
2062 | } |
2063 | ||
ac112332 | 2064 | if (namebytes != (namestart + name_len)) { |
0f113f3e | 2065 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 2066 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
2067 | SSL_R_CA_DN_LENGTH_MISMATCH); |
2068 | goto err; | |
2069 | } | |
2070 | if (!sk_X509_NAME_push(ca_sk, xn)) { | |
b9908bf9 | 2071 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2072 | goto err; |
2073 | } | |
0f113f3e MC |
2074 | } |
2075 | ||
0f113f3e MC |
2076 | /* we should setup a certificate to return.... */ |
2077 | s->s3->tmp.cert_req = 1; | |
2078 | s->s3->tmp.ctype_num = ctype_num; | |
222561fe | 2079 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
0f113f3e MC |
2080 | s->s3->tmp.ca_names = ca_sk; |
2081 | ca_sk = NULL; | |
2082 | ||
b9908bf9 | 2083 | ret = MSG_PROCESS_CONTINUE_READING; |
cc273a93 | 2084 | goto done; |
0f113f3e | 2085 | err: |
fe3a3291 | 2086 | ossl_statem_set_error(s); |
cc273a93 | 2087 | done: |
222561fe | 2088 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
b9908bf9 | 2089 | return ret; |
0f113f3e MC |
2090 | } |
2091 | ||
2092 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
dfeab068 | 2093 | { |
0f113f3e | 2094 | return (X509_NAME_cmp(*a, *b)); |
dfeab068 | 2095 | } |
dfeab068 | 2096 | |
be3583fa | 2097 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2098 | { |
2099 | int al; | |
2100 | unsigned int ticklen; | |
2101 | unsigned long ticket_lifetime_hint; | |
b9908bf9 | 2102 | |
73999b62 MC |
2103 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
2104 | || !PACKET_get_net_2(pkt, &ticklen) | |
2105 | || PACKET_remaining(pkt) != ticklen) { | |
e711da71 | 2106 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 2107 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
e711da71 EK |
2108 | goto f_err; |
2109 | } | |
2110 | ||
2111 | /* Server is allowed to change its mind and send an empty ticket. */ | |
2112 | if (ticklen == 0) | |
c9de4a20 | 2113 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 2114 | |
98ece4ee MC |
2115 | if (s->session->session_id_length > 0) { |
2116 | int i = s->session_ctx->session_cache_mode; | |
2117 | SSL_SESSION *new_sess; | |
2118 | /* | |
2119 | * We reused an existing session, so we need to replace it with a new | |
2120 | * one | |
2121 | */ | |
2122 | if (i & SSL_SESS_CACHE_CLIENT) { | |
2123 | /* | |
2124 | * Remove the old session from the cache | |
2125 | */ | |
2126 | if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) { | |
2127 | if (s->session_ctx->remove_session_cb != NULL) | |
2128 | s->session_ctx->remove_session_cb(s->session_ctx, | |
2129 | s->session); | |
2130 | } else { | |
2131 | /* We carry on if this fails */ | |
2132 | SSL_CTX_remove_session(s->session_ctx, s->session); | |
2133 | } | |
2134 | } | |
2135 | ||
2136 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
2137 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 2138 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
2139 | goto f_err; |
2140 | } | |
2141 | ||
2142 | SSL_SESSION_free(s->session); | |
2143 | s->session = new_sess; | |
2144 | } | |
2145 | ||
b548a1f1 RS |
2146 | OPENSSL_free(s->session->tlsext_tick); |
2147 | s->session->tlsext_ticklen = 0; | |
e711da71 | 2148 | |
0f113f3e | 2149 | s->session->tlsext_tick = OPENSSL_malloc(ticklen); |
a71edf3b | 2150 | if (s->session->tlsext_tick == NULL) { |
b9908bf9 | 2151 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2152 | goto err; |
2153 | } | |
73999b62 | 2154 | if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) { |
561e12bb | 2155 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2156 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
2157 | goto f_err; |
2158 | } | |
e711da71 EK |
2159 | |
2160 | s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint; | |
0f113f3e MC |
2161 | s->session->tlsext_ticklen = ticklen; |
2162 | /* | |
2163 | * There are two ways to detect a resumed ticket session. One is to set | |
2164 | * an appropriate session ID and then the server must return a match in | |
2165 | * ServerHello. This allows the normal client session ID matching to work | |
2166 | * and we know much earlier that the ticket has been accepted. The | |
2167 | * other way is to set zero length session ID when the ticket is | |
2168 | * presented and rely on the handshake to determine session resumption. | |
2169 | * We choose the former approach because this fits in with assumptions | |
2170 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2171 | * SHA256 is disabled) hash of the ticket. | |
2172 | */ | |
561e12bb | 2173 | EVP_Digest(s->session->tlsext_tick, ticklen, |
0f113f3e | 2174 | s->session->session_id, &s->session->session_id_length, |
0f113f3e | 2175 | EVP_sha256(), NULL); |
b9908bf9 | 2176 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2177 | f_err: |
2178 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2179 | err: | |
fe3a3291 | 2180 | ossl_statem_set_error(s); |
b9908bf9 | 2181 | return MSG_PROCESS_ERROR; |
0f113f3e | 2182 | } |
67c8e7f4 | 2183 | |
be3583fa | 2184 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2185 | { |
2186 | int al; | |
2187 | unsigned long resplen; | |
2188 | unsigned int type; | |
b9908bf9 | 2189 | |
73999b62 | 2190 | if (!PACKET_get_1(pkt, &type) |
ac63710a | 2191 | || type != TLSEXT_STATUSTYPE_ocsp) { |
0f113f3e | 2192 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2193 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE); |
0f113f3e MC |
2194 | goto f_err; |
2195 | } | |
73999b62 MC |
2196 | if (!PACKET_get_net_3(pkt, &resplen) |
2197 | || PACKET_remaining(pkt) != resplen) { | |
0f113f3e | 2198 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2199 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2200 | goto f_err; |
2201 | } | |
ac63710a | 2202 | s->tlsext_ocsp_resp = OPENSSL_malloc(resplen); |
a71edf3b | 2203 | if (s->tlsext_ocsp_resp == NULL) { |
0f113f3e | 2204 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2205 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2206 | goto f_err; |
2207 | } | |
73999b62 | 2208 | if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) { |
ac63710a | 2209 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2210 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); |
ac63710a MC |
2211 | goto f_err; |
2212 | } | |
0f113f3e | 2213 | s->tlsext_ocsp_resplen = resplen; |
b9908bf9 | 2214 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2215 | f_err: |
2216 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2217 | ossl_statem_set_error(s); |
b9908bf9 | 2218 | return MSG_PROCESS_ERROR; |
0f113f3e | 2219 | } |
d02b48c6 | 2220 | |
be3583fa | 2221 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) |
b9908bf9 | 2222 | { |
73999b62 | 2223 | if (PACKET_remaining(pkt) > 0) { |
0f113f3e MC |
2224 | /* should contain no data */ |
2225 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
b9908bf9 | 2226 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); |
fe3a3291 | 2227 | ossl_statem_set_error(s); |
b9908bf9 | 2228 | return MSG_PROCESS_ERROR; |
0f113f3e | 2229 | } |
b9908bf9 MC |
2230 | |
2231 | #ifndef OPENSSL_NO_SRP | |
2232 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2233 | if (SRP_Calc_A_param(s) <= 0) { | |
2234 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2235 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 2236 | ossl_statem_set_error(s); |
b9908bf9 MC |
2237 | return MSG_PROCESS_ERROR; |
2238 | } | |
2239 | } | |
2240 | #endif | |
2241 | ||
a455d0f6 MC |
2242 | /* |
2243 | * at this point we check that we have the required stuff from | |
2244 | * the server | |
2245 | */ | |
2246 | if (!ssl3_check_cert_and_algorithm(s)) { | |
2247 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
fe3a3291 | 2248 | ossl_statem_set_error(s); |
a455d0f6 MC |
2249 | return MSG_PROCESS_ERROR; |
2250 | } | |
2251 | ||
bb1aaab4 MC |
2252 | /* |
2253 | * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and | |
2254 | * |tlsext_ocsp_resplen| values will be set if we actually received a status | |
2255 | * message, or NULL and -1 otherwise | |
2256 | */ | |
b1931d43 | 2257 | if (s->tlsext_status_type != -1 && s->ctx->tlsext_status_cb != NULL) { |
bb1aaab4 MC |
2258 | int ret; |
2259 | ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); | |
2260 | if (ret == 0) { | |
2261 | ssl3_send_alert(s, SSL3_AL_FATAL, | |
2262 | SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE); | |
2263 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, | |
2264 | SSL_R_INVALID_STATUS_RESPONSE); | |
2265 | return MSG_PROCESS_ERROR; | |
2266 | } | |
2267 | if (ret < 0) { | |
2268 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2269 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, ERR_R_MALLOC_FAILURE); | |
2270 | return MSG_PROCESS_ERROR; | |
2271 | } | |
2272 | } | |
2273 | ||
473483d4 MC |
2274 | #ifndef OPENSSL_NO_SCTP |
2275 | /* Only applies to renegotiation */ | |
2276 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s)) | |
2277 | && s->renegotiate != 0) | |
2278 | return MSG_PROCESS_CONTINUE_PROCESSING; | |
2279 | else | |
2280 | #endif | |
2281 | return MSG_PROCESS_FINISHED_READING; | |
0f113f3e | 2282 | } |
176f31dd | 2283 | |
b9908bf9 | 2284 | int tls_construct_client_key_exchange(SSL *s) |
0f113f3e MC |
2285 | { |
2286 | unsigned char *p; | |
2287 | int n; | |
7689082b DSH |
2288 | #ifndef OPENSSL_NO_PSK |
2289 | size_t pskhdrlen = 0; | |
2290 | #endif | |
0f113f3e | 2291 | unsigned long alg_k; |
bc36ee62 | 2292 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
2293 | unsigned char *q; |
2294 | EVP_PKEY *pkey = NULL; | |
923ffa97 | 2295 | EVP_PKEY_CTX *pctx = NULL; |
79df9d62 | 2296 | #endif |
fb79abe3 | 2297 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a | 2298 | EVP_PKEY *ckey = NULL, *skey = NULL; |
fb79abe3 DSH |
2299 | #endif |
2300 | #ifndef OPENSSL_NO_EC | |
0f113f3e MC |
2301 | unsigned char *encodedPoint = NULL; |
2302 | int encoded_pt_len = 0; | |
ea262260 | 2303 | #endif |
c660ec63 DSH |
2304 | unsigned char *pms = NULL; |
2305 | size_t pmslen = 0; | |
7689082b | 2306 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
d02b48c6 | 2307 | |
b9908bf9 | 2308 | p = ssl_handshake_start(s); |
d02b48c6 | 2309 | |
7689082b DSH |
2310 | |
2311 | #ifndef OPENSSL_NO_PSK | |
b9908bf9 MC |
2312 | if (alg_k & SSL_PSK) { |
2313 | int psk_err = 1; | |
2314 | /* | |
2315 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2316 | * \0-terminated identity. The last byte is for us for simulating | |
2317 | * strnlen. | |
2318 | */ | |
2319 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2320 | size_t identitylen; | |
2321 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2322 | size_t psklen; | |
2323 | ||
2324 | if (s->psk_client_callback == NULL) { | |
2325 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2326 | SSL_R_PSK_NO_CLIENT_CB); | |
2327 | goto err; | |
2328 | } | |
7689082b | 2329 | |
b9908bf9 | 2330 | memset(identity, 0, sizeof(identity)); |
7689082b | 2331 | |
b9908bf9 MC |
2332 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2333 | identity, sizeof(identity) - 1, | |
2334 | psk, sizeof(psk)); | |
7689082b | 2335 | |
b9908bf9 MC |
2336 | if (psklen > PSK_MAX_PSK_LEN) { |
2337 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2338 | ERR_R_INTERNAL_ERROR); | |
2339 | goto psk_err; | |
2340 | } else if (psklen == 0) { | |
2341 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2342 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
2343 | goto psk_err; | |
2344 | } | |
b9908bf9 | 2345 | OPENSSL_free(s->s3->tmp.psk); |
7644a9ae | 2346 | s->s3->tmp.psk = OPENSSL_memdup(psk, psklen); |
b9908bf9 | 2347 | OPENSSL_cleanse(psk, psklen); |
7689082b | 2348 | |
b9908bf9 MC |
2349 | if (s->s3->tmp.psk == NULL) { |
2350 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2351 | goto memerr; | |
2352 | } | |
7689082b | 2353 | |
b9908bf9 | 2354 | s->s3->tmp.psklen = psklen; |
b9908bf9 MC |
2355 | identitylen = strlen(identity); |
2356 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
2357 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2358 | ERR_R_INTERNAL_ERROR); | |
2359 | goto psk_err; | |
2360 | } | |
2361 | OPENSSL_free(s->session->psk_identity); | |
7644a9ae | 2362 | s->session->psk_identity = OPENSSL_strdup(identity); |
b9908bf9 | 2363 | if (s->session->psk_identity == NULL) { |
7689082b | 2364 | OPENSSL_cleanse(identity, sizeof(identity)); |
b9908bf9 | 2365 | goto memerr; |
7689082b | 2366 | } |
d02b48c6 | 2367 | |
b9908bf9 MC |
2368 | s2n(identitylen, p); |
2369 | memcpy(p, identity, identitylen); | |
2370 | pskhdrlen = 2 + identitylen; | |
2371 | p += identitylen; | |
2372 | psk_err = 0; | |
2373 | psk_err: | |
2374 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2375 | if (psk_err != 0) { | |
2376 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2377 | goto err; | |
0f113f3e | 2378 | } |
b9908bf9 MC |
2379 | } |
2380 | if (alg_k & SSL_kPSK) { | |
2381 | n = 0; | |
2382 | } else | |
2383 | #endif | |
2384 | ||
2385 | /* Fool emacs indentation */ | |
2386 | if (0) { | |
2387 | } | |
bc36ee62 | 2388 | #ifndef OPENSSL_NO_RSA |
b9908bf9 | 2389 | else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
923ffa97 | 2390 | size_t enclen; |
b9908bf9 MC |
2391 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2392 | pms = OPENSSL_malloc(pmslen); | |
a71edf3b | 2393 | if (pms == NULL) |
b9908bf9 MC |
2394 | goto memerr; |
2395 | ||
2396 | if (s->session->peer == NULL) { | |
2397 | /* | |
2398 | * We should always have a server certificate with SSL_kRSA. | |
2399 | */ | |
2400 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2401 | ERR_R_INTERNAL_ERROR); | |
2402 | goto err; | |
2403 | } | |
0f113f3e | 2404 | |
8382fd3a | 2405 | pkey = X509_get0_pubkey(s->session->peer); |
361a1191 KR |
2406 | if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA) |
2407 | || (pkey->pkey.rsa == NULL)) { | |
2408 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2409 | ERR_R_INTERNAL_ERROR); | |
361a1191 | 2410 | goto err; |
b9908bf9 | 2411 | } |
0f113f3e | 2412 | |
b9908bf9 MC |
2413 | pms[0] = s->client_version >> 8; |
2414 | pms[1] = s->client_version & 0xff; | |
2415 | if (RAND_bytes(pms + 2, pmslen - 2) <= 0) | |
2416 | goto err; | |
0f113f3e | 2417 | |
b9908bf9 MC |
2418 | q = p; |
2419 | /* Fix buf for TLS and beyond */ | |
2420 | if (s->version > SSL3_VERSION) | |
2421 | p += 2; | |
923ffa97 | 2422 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
923ffa97 DSH |
2423 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 |
2424 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
2425 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2426 | ERR_R_EVP_LIB); | |
2427 | goto err; | |
2428 | } | |
2429 | if (EVP_PKEY_encrypt(pctx, p, &enclen, pms, pmslen) <= 0) { | |
2430 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2431 | SSL_R_BAD_RSA_ENCRYPT); | |
2432 | goto err; | |
2433 | } | |
2434 | n = enclen; | |
2435 | EVP_PKEY_CTX_free(pctx); | |
2436 | pctx = NULL; | |
0f113f3e | 2437 | # ifdef PKCS1_CHECK |
b9908bf9 MC |
2438 | if (s->options & SSL_OP_PKCS1_CHECK_1) |
2439 | p[1]++; | |
2440 | if (s->options & SSL_OP_PKCS1_CHECK_2) | |
2441 | tmp_buf[0] = 0x70; | |
0f113f3e | 2442 | # endif |
0f113f3e | 2443 | |
b9908bf9 MC |
2444 | /* Fix buf for TLS and beyond */ |
2445 | if (s->version > SSL3_VERSION) { | |
2446 | s2n(n, q); | |
2447 | n += 2; | |
0f113f3e | 2448 | } |
b9908bf9 | 2449 | } |
f9b3bff6 | 2450 | #endif |
bc36ee62 | 2451 | #ifndef OPENSSL_NO_DH |
bc71f910 | 2452 | else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
fb79abe3 DSH |
2453 | DH *dh_clnt = NULL; |
2454 | skey = s->s3->peer_tmp; | |
2455 | if (skey == NULL) { | |
bc71f910 DSH |
2456 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, |
2457 | ERR_R_INTERNAL_ERROR); | |
2458 | goto err; | |
0f113f3e | 2459 | } |
fb79abe3 DSH |
2460 | ckey = ssl_generate_pkey(skey, NID_undef); |
2461 | dh_clnt = EVP_PKEY_get0_DH(ckey); | |
0f113f3e | 2462 | |
fb79abe3 DSH |
2463 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey) == 0) { |
2464 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2465 | ERR_R_INTERNAL_ERROR); | |
b9908bf9 MC |
2466 | goto err; |
2467 | } | |
fb79abe3 | 2468 | |
0f113f3e | 2469 | |
bc71f910 DSH |
2470 | /* send off the data */ |
2471 | n = BN_num_bytes(dh_clnt->pub_key); | |
2472 | s2n(n, p); | |
2473 | BN_bn2bin(dh_clnt->pub_key, p); | |
2474 | n += 2; | |
fb79abe3 DSH |
2475 | EVP_PKEY_free(ckey); |
2476 | ckey = NULL; | |
b9908bf9 MC |
2477 | } |
2478 | #endif | |
0f113f3e | 2479 | |
b9908bf9 MC |
2480 | #ifndef OPENSSL_NO_EC |
2481 | else if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe | SSL_kECDHEPSK)) { | |
0f113f3e | 2482 | |
61dd9f7a DSH |
2483 | if (s->s3->peer_tmp != NULL) { |
2484 | skey = s->s3->peer_tmp; | |
b9908bf9 MC |
2485 | } else { |
2486 | /* Get the Server Public Key from Cert */ | |
61dd9f7a DSH |
2487 | skey = X509_get0_pubkey(s->session->peer); |
2488 | if ((skey == NULL) | |
2489 | || (skey->type != EVP_PKEY_EC) | |
2490 | || (skey->pkey.ec == NULL)) { | |
b9908bf9 | 2491 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, |
266483d2 MC |
2492 | ERR_R_INTERNAL_ERROR); |
2493 | goto err; | |
0f113f3e | 2494 | } |
b9908bf9 MC |
2495 | } |
2496 | ||
61dd9f7a | 2497 | ckey = ssl_generate_pkey(skey, NID_undef); |
b9908bf9 | 2498 | |
61dd9f7a DSH |
2499 | if (ssl_derive(s, ckey, skey) == 0) { |
2500 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
b9908bf9 MC |
2501 | goto err; |
2502 | } | |
2503 | ||
61dd9f7a DSH |
2504 | /* Generate encoding of client key */ |
2505 | encoded_pt_len = EC_KEY_key2buf(EVP_PKEY_get0_EC_KEY(ckey), | |
2506 | POINT_CONVERSION_UNCOMPRESSED, | |
2507 | &encodedPoint, NULL); | |
cae41364 | 2508 | |
c66ce5eb DSH |
2509 | if (encoded_pt_len == 0) { |
2510 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); | |
2511 | goto err; | |
2512 | } | |
b9908bf9 | 2513 | |
61dd9f7a DSH |
2514 | EVP_PKEY_free(ckey); |
2515 | ckey = NULL; | |
2516 | ||
c66ce5eb | 2517 | n = encoded_pt_len; |
b9908bf9 | 2518 | |
c66ce5eb DSH |
2519 | *p = n; /* length of encoded point */ |
2520 | /* Encoded point will be copied here */ | |
2521 | p += 1; | |
2522 | /* copy the point */ | |
2523 | memcpy(p, encodedPoint, n); | |
2524 | /* increment n to account for length field */ | |
2525 | n += 1; | |
0f113f3e | 2526 | |
b9908bf9 | 2527 | /* Free allocated memory */ |
b9908bf9 | 2528 | OPENSSL_free(encodedPoint); |
b9908bf9 MC |
2529 | } |
2530 | #endif /* !OPENSSL_NO_EC */ | |
2a9b9654 | 2531 | #ifndef OPENSSL_NO_GOST |
b9908bf9 MC |
2532 | else if (alg_k & SSL_kGOST) { |
2533 | /* GOST key exchange message creation */ | |
2534 | EVP_PKEY_CTX *pkey_ctx; | |
2535 | X509 *peer_cert; | |
2536 | size_t msglen; | |
2537 | unsigned int md_len; | |
2538 | unsigned char shared_ukm[32], tmp[256]; | |
2539 | EVP_MD_CTX *ukm_hash; | |
e44380a9 DB |
2540 | int dgst_nid = NID_id_GostR3411_94; |
2541 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
2542 | dgst_nid = NID_id_GostR3411_2012_256; | |
2543 | ||
b9908bf9 MC |
2544 | |
2545 | pmslen = 32; | |
2546 | pms = OPENSSL_malloc(pmslen); | |
a71edf3b | 2547 | if (pms == NULL) |
b9908bf9 | 2548 | goto memerr; |
7689082b | 2549 | |
b9908bf9 MC |
2550 | /* |
2551 | * Get server sertificate PKEY and create ctx from it | |
2552 | */ | |
2553 | peer_cert = s->session->peer; | |
2554 | if (!peer_cert) { | |
2555 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2556 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); | |
77d514c5 MC |
2557 | goto err; |
2558 | } | |
2559 | ||
8382fd3a | 2560 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); |
a71edf3b MC |
2561 | if (pkey_ctx == NULL) { |
2562 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2563 | ERR_R_MALLOC_FAILURE); | |
2564 | goto err; | |
2565 | } | |
b9908bf9 MC |
2566 | /* |
2567 | * If we have send a certificate, and certificate key | |
5f3d93e4 | 2568 | * parameters match those of server certificate, use |
b9908bf9 MC |
2569 | * certificate key for key exchange |
2570 | */ | |
0f113f3e | 2571 | |
b9908bf9 MC |
2572 | /* Otherwise, generate ephemeral key pair */ |
2573 | ||
5f3d93e4 MC |
2574 | if (pkey_ctx == NULL |
2575 | || EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
2576 | /* Generate session key */ | |
2577 | || RAND_bytes(pms, pmslen) <= 0) { | |
b9908bf9 MC |
2578 | EVP_PKEY_CTX_free(pkey_ctx); |
2579 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2580 | ERR_R_INTERNAL_ERROR); | |
2581 | goto err; | |
2582 | }; | |
c660ec63 | 2583 | /* |
b9908bf9 | 2584 | * If we have client certificate, use its secret as peer key |
c660ec63 | 2585 | */ |
b9908bf9 MC |
2586 | if (s->s3->tmp.cert_req && s->cert->key->privatekey) { |
2587 | if (EVP_PKEY_derive_set_peer | |
2588 | (pkey_ctx, s->cert->key->privatekey) <= 0) { | |
2589 | /* | |
2590 | * If there was an error - just ignore it. Ephemeral key | |
2591 | * * would be used | |
2592 | */ | |
2593 | ERR_clear_error(); | |
c660ec63 DSH |
2594 | } |
2595 | } | |
b9908bf9 MC |
2596 | /* |
2597 | * Compute shared IV and store it in algorithm-specific context | |
2598 | * data | |
2599 | */ | |
bfb0641f | 2600 | ukm_hash = EVP_MD_CTX_new(); |
5f3d93e4 | 2601 | if (EVP_DigestInit(ukm_hash, |
e44380a9 | 2602 | EVP_get_digestbynid(dgst_nid)) <= 0 |
5f3d93e4 MC |
2603 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, |
2604 | SSL3_RANDOM_SIZE) <= 0 | |
2605 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2606 | SSL3_RANDOM_SIZE) <= 0 | |
2607 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
bfb0641f | 2608 | EVP_MD_CTX_free(ukm_hash); |
5f3d93e4 MC |
2609 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, |
2610 | ERR_R_INTERNAL_ERROR); | |
2611 | goto err; | |
2612 | } | |
bfb0641f | 2613 | EVP_MD_CTX_free(ukm_hash); |
b9908bf9 MC |
2614 | if (EVP_PKEY_CTX_ctrl |
2615 | (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8, | |
2616 | shared_ukm) < 0) { | |
2617 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2618 | SSL_R_LIBRARY_BUG); | |
2619 | goto err; | |
c660ec63 | 2620 | } |
b9908bf9 MC |
2621 | /* Make GOST keytransport blob message */ |
2622 | /* | |
2623 | * Encapsulate it into sequence | |
2624 | */ | |
2625 | *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; | |
2626 | msglen = 255; | |
5f3d93e4 | 2627 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { |
b9908bf9 MC |
2628 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, |
2629 | SSL_R_LIBRARY_BUG); | |
c660ec63 DSH |
2630 | goto err; |
2631 | } | |
b9908bf9 MC |
2632 | if (msglen >= 0x80) { |
2633 | *(p++) = 0x81; | |
2634 | *(p++) = msglen & 0xff; | |
2635 | n = msglen + 3; | |
2636 | } else { | |
2637 | *(p++) = msglen & 0xff; | |
2638 | n = msglen + 2; | |
2639 | } | |
2640 | memcpy(p, tmp, msglen); | |
2641 | /* Check if pubkey from client certificate was used */ | |
2642 | if (EVP_PKEY_CTX_ctrl | |
2643 | (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) { | |
2644 | /* Set flag "skip certificate verify" */ | |
2645 | s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; | |
2646 | } | |
2647 | EVP_PKEY_CTX_free(pkey_ctx); | |
b9908bf9 MC |
2648 | |
2649 | } | |
2a9b9654 | 2650 | #endif |
b9908bf9 MC |
2651 | #ifndef OPENSSL_NO_SRP |
2652 | else if (alg_k & SSL_kSRP) { | |
2653 | if (s->srp_ctx.A != NULL) { | |
2654 | /* send off the data */ | |
2655 | n = BN_num_bytes(s->srp_ctx.A); | |
2656 | s2n(n, p); | |
2657 | BN_bn2bin(s->srp_ctx.A, p); | |
2658 | n += 2; | |
2659 | } else { | |
2660 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2661 | ERR_R_INTERNAL_ERROR); | |
2662 | goto err; | |
2663 | } | |
2664 | OPENSSL_free(s->session->srp_username); | |
7644a9ae | 2665 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); |
b9908bf9 MC |
2666 | if (s->session->srp_username == NULL) { |
2667 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2668 | ERR_R_MALLOC_FAILURE); | |
69f68237 MC |
2669 | goto err; |
2670 | } | |
c660ec63 | 2671 | } |
b9908bf9 MC |
2672 | #endif |
2673 | else { | |
2674 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2675 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2676 | goto err; | |
2677 | } | |
2678 | ||
2679 | #ifndef OPENSSL_NO_PSK | |
2680 | n += pskhdrlen; | |
2681 | #endif | |
2682 | ||
2683 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) { | |
2684 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2685 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2686 | goto err; | |
2687 | } | |
2688 | ||
61dd9f7a DSH |
2689 | if (pms != NULL) { |
2690 | s->s3->tmp.pms = pms; | |
2691 | s->s3->tmp.pmslen = pmslen; | |
2692 | } | |
b9908bf9 MC |
2693 | |
2694 | return 1; | |
c660ec63 DSH |
2695 | memerr: |
2696 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2697 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); |
0f113f3e | 2698 | err: |
4b45c6e5 | 2699 | OPENSSL_clear_free(pms, pmslen); |
76106e60 | 2700 | s->s3->tmp.pms = NULL; |
923ffa97 DSH |
2701 | #ifndef OPENSSL_NO_RSA |
2702 | EVP_PKEY_CTX_free(pctx); | |
2703 | #endif | |
10bf4fc2 | 2704 | #ifndef OPENSSL_NO_EC |
b548a1f1 | 2705 | OPENSSL_free(encodedPoint); |
fb79abe3 DSH |
2706 | #endif |
2707 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) | |
61dd9f7a | 2708 | EVP_PKEY_free(ckey); |
7689082b DSH |
2709 | #endif |
2710 | #ifndef OPENSSL_NO_PSK | |
2711 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
2712 | s->s3->tmp.psk = NULL; | |
0f113f3e | 2713 | #endif |
fe3a3291 | 2714 | ossl_statem_set_error(s); |
b9908bf9 MC |
2715 | return 0; |
2716 | } | |
2717 | ||
2718 | int tls_client_key_exchange_post_work(SSL *s) | |
2719 | { | |
2720 | unsigned char *pms = NULL; | |
2721 | size_t pmslen = 0; | |
2722 | ||
2723 | #ifndef OPENSSL_NO_SRP | |
2724 | /* Check for SRP */ | |
2725 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2726 | if (!srp_generate_client_master_secret(s)) { | |
2727 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
2728 | ERR_R_INTERNAL_ERROR); | |
2729 | goto err; | |
2730 | } | |
2731 | return 1; | |
2732 | } | |
2733 | #endif | |
2734 | pms = s->s3->tmp.pms; | |
2735 | pmslen = s->s3->tmp.pmslen; | |
2736 | ||
2737 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
2738 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2739 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
2740 | goto err; | |
2741 | } | |
2742 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
2743 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2744 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
2745 | goto err; | |
2746 | } | |
473483d4 MC |
2747 | |
2748 | #ifndef OPENSSL_NO_SCTP | |
2749 | if (SSL_IS_DTLS(s)) { | |
2750 | unsigned char sctpauthkey[64]; | |
2751 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
2752 | ||
2753 | /* | |
2754 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
2755 | * used. | |
2756 | */ | |
141eb8c6 MC |
2757 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
2758 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
2759 | |
2760 | if (SSL_export_keying_material(s, sctpauthkey, | |
2761 | sizeof(sctpauthkey), labelbuffer, | |
2762 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
2763 | goto err; | |
2764 | ||
2765 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
2766 | sizeof(sctpauthkey), sctpauthkey); | |
2767 | } | |
2768 | #endif | |
2769 | ||
b9908bf9 MC |
2770 | return 1; |
2771 | err: | |
2772 | OPENSSL_clear_free(pms, pmslen); | |
2773 | s->s3->tmp.pms = NULL; | |
2774 | return 0; | |
0f113f3e | 2775 | } |
d02b48c6 | 2776 | |
b9908bf9 | 2777 | int tls_construct_client_verify(SSL *s) |
0f113f3e MC |
2778 | { |
2779 | unsigned char *p; | |
0f113f3e | 2780 | EVP_PKEY *pkey; |
a0f63828 | 2781 | const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys]; |
6e59a892 | 2782 | EVP_MD_CTX *mctx; |
0f113f3e | 2783 | unsigned u = 0; |
2a9b9654 | 2784 | unsigned long n = 0; |
a0f63828 DSH |
2785 | long hdatalen = 0; |
2786 | void *hdata; | |
0f113f3e | 2787 | |
bfb0641f | 2788 | mctx = EVP_MD_CTX_new(); |
6e59a892 RL |
2789 | if (mctx == NULL) { |
2790 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE); | |
2791 | goto err; | |
2792 | } | |
0f113f3e | 2793 | |
b9908bf9 MC |
2794 | p = ssl_handshake_start(s); |
2795 | pkey = s->cert->key->privatekey; | |
a0f63828 DSH |
2796 | |
2797 | hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); | |
2798 | if (hdatalen <= 0) { | |
5f3d93e4 MC |
2799 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); |
2800 | goto err; | |
2801 | } | |
a0f63828 DSH |
2802 | if (SSL_USE_SIGALGS(s)) { |
2803 | if (!tls12_get_sigandhash(p, pkey, md)) { | |
b9908bf9 MC |
2804 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); |
2805 | goto err; | |
0f113f3e | 2806 | } |
a0f63828 | 2807 | p += 2; |
2a9b9654 | 2808 | n = 2; |
a0f63828 | 2809 | } |
855a54a9 | 2810 | #ifdef SSL_DEBUG |
a0f63828 | 2811 | fprintf(stderr, "Using client alg %s\n", EVP_MD_name(md)); |
b9908bf9 | 2812 | #endif |
6e59a892 RL |
2813 | if (!EVP_SignInit_ex(mctx, md, NULL) |
2814 | || !EVP_SignUpdate(mctx, hdata, hdatalen) | |
a0f63828 | 2815 | || (s->version == SSL3_VERSION |
6e59a892 | 2816 | && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET, |
a0f63828 DSH |
2817 | s->session->master_key_length, |
2818 | s->session->master_key)) | |
6e59a892 | 2819 | || !EVP_SignFinal(mctx, p + 2, &u, pkey)) { |
a0f63828 DSH |
2820 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB); |
2821 | goto err; | |
2822 | } | |
2a9b9654 | 2823 | #ifndef OPENSSL_NO_GOST |
e44380a9 DB |
2824 | if (pkey->type == NID_id_GostR3410_2001 |
2825 | || pkey->type == NID_id_GostR3410_2012_256 | |
2826 | || pkey->type == NID_id_GostR3410_2012_512) { | |
2a9b9654 | 2827 | BUF_reverse(p + 2, NULL, u); |
b9908bf9 | 2828 | } |
2a9b9654 | 2829 | #endif |
a0f63828 DSH |
2830 | |
2831 | s2n(u, p); | |
2a9b9654 | 2832 | n += u + 2; |
a0f63828 DSH |
2833 | /* Digest cached records and discard handshake buffer */ |
2834 | if (!ssl3_digest_cached_records(s, 0)) | |
2835 | goto err; | |
b9908bf9 MC |
2836 | if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) { |
2837 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); | |
2838 | goto err; | |
0f113f3e | 2839 | } |
b9908bf9 | 2840 | |
bfb0641f | 2841 | EVP_MD_CTX_free(mctx); |
b9908bf9 | 2842 | return 1; |
0f113f3e | 2843 | err: |
bfb0641f | 2844 | EVP_MD_CTX_free(mctx); |
b9908bf9 | 2845 | return 0; |
0f113f3e MC |
2846 | } |
2847 | ||
2848 | /* | |
2849 | * Check a certificate can be used for client authentication. Currently check | |
2850 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
2851 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
2852 | */ |
2853 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 2854 | { |
0f113f3e MC |
2855 | if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey) |
2856 | return 0; | |
2857 | /* If no suitable signature algorithm can't use certificate */ | |
d376e57d | 2858 | if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys]) |
0f113f3e MC |
2859 | return 0; |
2860 | /* | |
2861 | * If strict mode check suitability of chain before using it. This also | |
2862 | * adjusts suite B digest if necessary. | |
2863 | */ | |
2864 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
2865 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
2866 | return 0; | |
0f113f3e MC |
2867 | return 1; |
2868 | } | |
0d609395 | 2869 | |
be3583fa | 2870 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
2871 | { |
2872 | X509 *x509 = NULL; | |
2873 | EVP_PKEY *pkey = NULL; | |
2874 | int i; | |
2875 | ||
b9908bf9 | 2876 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
2877 | /* Let cert callback update client certificates if required */ |
2878 | if (s->cert->cert_cb) { | |
2879 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
2880 | if (i < 0) { | |
2881 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 2882 | return WORK_MORE_A; |
0f113f3e MC |
2883 | } |
2884 | if (i == 0) { | |
2885 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 2886 | ossl_statem_set_error(s); |
0f113f3e MC |
2887 | return 0; |
2888 | } | |
2889 | s->rwstate = SSL_NOTHING; | |
2890 | } | |
2891 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
2892 | return WORK_FINISHED_CONTINUE; |
2893 | ||
2894 | /* Fall through to WORK_MORE_B */ | |
2895 | wst = WORK_MORE_B; | |
0f113f3e MC |
2896 | } |
2897 | ||
2898 | /* We need to get a client cert */ | |
b9908bf9 | 2899 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
2900 | /* |
2901 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
2902 | * return(-1); We then get retied later | |
2903 | */ | |
0f113f3e MC |
2904 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
2905 | if (i < 0) { | |
2906 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 2907 | return WORK_MORE_B; |
0f113f3e MC |
2908 | } |
2909 | s->rwstate = SSL_NOTHING; | |
2910 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
2911 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
2912 | i = 0; | |
2913 | } else if (i == 1) { | |
2914 | i = 0; | |
b9908bf9 | 2915 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
2916 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
2917 | } | |
2918 | ||
222561fe | 2919 | X509_free(x509); |
25aaa98a | 2920 | EVP_PKEY_free(pkey); |
0f113f3e MC |
2921 | if (i && !ssl3_check_client_certificate(s)) |
2922 | i = 0; | |
2923 | if (i == 0) { | |
2924 | if (s->version == SSL3_VERSION) { | |
2925 | s->s3->tmp.cert_req = 0; | |
2926 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 2927 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
2928 | } else { |
2929 | s->s3->tmp.cert_req = 2; | |
124037fd | 2930 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 2931 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 2932 | ossl_statem_set_error(s); |
dab18ab5 DSH |
2933 | return 0; |
2934 | } | |
0f113f3e MC |
2935 | } |
2936 | } | |
2937 | ||
b9908bf9 | 2938 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
2939 | } |
2940 | ||
b9908bf9 MC |
2941 | /* Shouldn't ever get here */ |
2942 | return WORK_ERROR; | |
2943 | } | |
2944 | ||
2945 | int tls_construct_client_certificate(SSL *s) | |
2946 | { | |
2947 | if (!ssl3_output_cert_chain(s, | |
2948 | (s->s3->tmp.cert_req == | |
2949 | 2) ? NULL : s->cert->key)) { | |
2950 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
2951 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 2952 | ossl_statem_set_error(s); |
b9908bf9 | 2953 | return 0; |
0f113f3e | 2954 | } |
b9908bf9 MC |
2955 | |
2956 | return 1; | |
0f113f3e MC |
2957 | } |
2958 | ||
2959 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 2960 | |
36d16f8e | 2961 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 2962 | { |
60f43e9e RL |
2963 | int i; |
2964 | #ifndef OPENSSL_NO_EC | |
2965 | int idx; | |
2966 | #endif | |
0f113f3e MC |
2967 | long alg_k, alg_a; |
2968 | EVP_PKEY *pkey = NULL; | |
26c79d56 | 2969 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 2970 | |
0f113f3e MC |
2971 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2972 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 2973 | |
0f113f3e | 2974 | /* we don't have a certificate */ |
55a9a16f | 2975 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 2976 | return (1); |
d02b48c6 | 2977 | |
0f113f3e | 2978 | /* This is the passed certificate */ |
d02b48c6 | 2979 | |
10bf4fc2 | 2980 | #ifndef OPENSSL_NO_EC |
60f43e9e | 2981 | idx = s->session->peer_type; |
0f113f3e | 2982 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 2983 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
2984 | /* check failed */ |
2985 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
2986 | goto f_err; | |
2987 | } else { | |
2988 | return 1; | |
2989 | } | |
2990 | } else if (alg_a & SSL_aECDSA) { | |
2991 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
2992 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
2993 | goto f_err; | |
2994 | } else if (alg_k & (SSL_kECDHr | SSL_kECDHe)) { | |
2995 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_ECDH_CERT); | |
2996 | goto f_err; | |
2997 | } | |
2998 | #endif | |
8382fd3a | 2999 | pkey = X509_get0_pubkey(s->session->peer); |
a273c6ee | 3000 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
3001 | |
3002 | /* Check that we have a certificate if we require one */ | |
3003 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
3004 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3005 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
3006 | goto f_err; | |
3007 | } | |
bc36ee62 | 3008 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3009 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
3010 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3011 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
3012 | goto f_err; | |
3013 | } | |
d02b48c6 | 3014 | #endif |
bc36ee62 | 3015 | #ifndef OPENSSL_NO_RSA |
361a1191 KR |
3016 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && |
3017 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3018 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3019 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3020 | goto f_err; | |
0f113f3e | 3021 | } |
79df9d62 | 3022 | #endif |
bc36ee62 | 3023 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 3024 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
26c79d56 KR |
3025 | al = SSL_AD_INTERNAL_ERROR; |
3026 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e | 3027 | goto f_err; |
0f113f3e | 3028 | } |
d02b48c6 RE |
3029 | #endif |
3030 | ||
0f113f3e MC |
3031 | return (1); |
3032 | f_err: | |
26c79d56 | 3033 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
3034 | return (0); |
3035 | } | |
3036 | ||
e481f9b9 | 3037 | #ifndef OPENSSL_NO_NEXTPROTONEG |
b9908bf9 MC |
3038 | int tls_construct_next_proto(SSL *s) |
3039 | { | |
3040 | unsigned int len, padding_len; | |
3041 | unsigned char *d; | |
3042 | ||
3043 | len = s->next_proto_negotiated_len; | |
3044 | padding_len = 32 - ((len + 2) % 32); | |
3045 | d = (unsigned char *)s->init_buf->data; | |
3046 | d[4] = len; | |
3047 | memcpy(d + 5, s->next_proto_negotiated, len); | |
3048 | d[5 + len] = padding_len; | |
3049 | memset(d + 6 + len, 0, padding_len); | |
3050 | *(d++) = SSL3_MT_NEXT_PROTO; | |
3051 | l2n3(2 + len + padding_len, d); | |
3052 | s->init_num = 4 + 2 + len + padding_len; | |
3053 | s->init_off = 0; | |
3054 | ||
3055 | return 1; | |
3056 | } | |
6434abbf | 3057 | #endif |
368888bc DSH |
3058 | |
3059 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) | |
0f113f3e MC |
3060 | { |
3061 | int i = 0; | |
368888bc | 3062 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3063 | if (s->ctx->client_cert_engine) { |
3064 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3065 | SSL_get_client_CA_list(s), | |
3066 | px509, ppkey, NULL, NULL, NULL); | |
3067 | if (i != 0) | |
3068 | return i; | |
3069 | } | |
3070 | #endif | |
3071 | if (s->ctx->client_cert_cb) | |
3072 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3073 | return i; | |
3074 | } | |
d45ba43d MC |
3075 | |
3076 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, | |
e9fa092e | 3077 | unsigned char *p) |
d45ba43d MC |
3078 | { |
3079 | int i, j = 0; | |
3080 | SSL_CIPHER *c; | |
3081 | unsigned char *q; | |
3082 | int empty_reneg_info_scsv = !s->renegotiate; | |
3083 | /* Set disabled masks for this session */ | |
3084 | ssl_set_client_disabled(s); | |
3085 | ||
3086 | if (sk == NULL) | |
3087 | return (0); | |
3088 | q = p; | |
d45ba43d MC |
3089 | |
3090 | for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { | |
3091 | c = sk_SSL_CIPHER_value(sk, i); | |
3092 | /* Skip disabled ciphers */ | |
3093 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) | |
3094 | continue; | |
3095 | #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL | |
3096 | if (c->id == SSL3_CK_SCSV) { | |
3097 | if (!empty_reneg_info_scsv) | |
3098 | continue; | |
3099 | else | |
3100 | empty_reneg_info_scsv = 0; | |
3101 | } | |
3102 | #endif | |
e9fa092e | 3103 | j = s->method->put_cipher_by_char(c, p); |
d45ba43d MC |
3104 | p += j; |
3105 | } | |
3106 | /* | |
3107 | * If p == q, no ciphers; caller indicates an error. Otherwise, add | |
3108 | * applicable SCSVs. | |
3109 | */ | |
3110 | if (p != q) { | |
3111 | if (empty_reneg_info_scsv) { | |
3112 | static SSL_CIPHER scsv = { | |
3113 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3114 | }; | |
e9fa092e | 3115 | j = s->method->put_cipher_by_char(&scsv, p); |
d45ba43d MC |
3116 | p += j; |
3117 | #ifdef OPENSSL_RI_DEBUG | |
3118 | fprintf(stderr, | |
3119 | "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n"); | |
3120 | #endif | |
3121 | } | |
3122 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3123 | static SSL_CIPHER scsv = { | |
3124 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3125 | }; | |
e9fa092e | 3126 | j = s->method->put_cipher_by_char(&scsv, p); |
d45ba43d MC |
3127 | p += j; |
3128 | } | |
3129 | } | |
3130 | ||
3131 | return (p - q); | |
3132 | } |