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58964a49 | 1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
2 | * All rights reserved. |
3 | * | |
4 | * This package is an SSL implementation written | |
5 | * by Eric Young (eay@cryptsoft.com). | |
6 | * The implementation was written so as to conform with Netscapes SSL. | |
0f113f3e | 7 | * |
d02b48c6 RE |
8 | * This library is free for commercial and non-commercial use as long as |
9 | * the following conditions are aheared to. The following conditions | |
10 | * apply to all code found in this distribution, be it the RC4, RSA, | |
11 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
12 | * included with this distribution is covered by the same copyright terms | |
13 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
0f113f3e | 14 | * |
d02b48c6 RE |
15 | * Copyright remains Eric Young's, and as such any Copyright notices in |
16 | * the code are not to be removed. | |
17 | * If this package is used in a product, Eric Young should be given attribution | |
18 | * as the author of the parts of the library used. | |
19 | * This can be in the form of a textual message at program startup or | |
20 | * in documentation (online or textual) provided with the package. | |
0f113f3e | 21 | * |
d02b48c6 RE |
22 | * Redistribution and use in source and binary forms, with or without |
23 | * modification, are permitted provided that the following conditions | |
24 | * are met: | |
25 | * 1. Redistributions of source code must retain the copyright | |
26 | * notice, this list of conditions and the following disclaimer. | |
27 | * 2. Redistributions in binary form must reproduce the above copyright | |
28 | * notice, this list of conditions and the following disclaimer in the | |
29 | * documentation and/or other materials provided with the distribution. | |
30 | * 3. All advertising materials mentioning features or use of this software | |
31 | * must display the following acknowledgement: | |
32 | * "This product includes cryptographic software written by | |
33 | * Eric Young (eay@cryptsoft.com)" | |
34 | * The word 'cryptographic' can be left out if the rouines from the library | |
35 | * being used are not cryptographic related :-). | |
0f113f3e | 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
37 | * the apps directory (application code) you must include an acknowledgement: |
38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 39 | * |
d02b48c6 RE |
40 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
43 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
44 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
45 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
46 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
48 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
49 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
50 | * SUCH DAMAGE. | |
0f113f3e | 51 | * |
d02b48c6 RE |
52 | * The licence and distribution terms for any publically available version or |
53 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
54 | * copied and put under another distribution licence | |
55 | * [including the GNU Public Licence.] | |
56 | */ | |
8c74b5e5 | 57 | /* ==================================================================== |
52b8dad8 | 58 | * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. |
8c74b5e5 BM |
59 | * |
60 | * Redistribution and use in source and binary forms, with or without | |
61 | * modification, are permitted provided that the following conditions | |
62 | * are met: | |
63 | * | |
64 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 65 | * notice, this list of conditions and the following disclaimer. |
8c74b5e5 BM |
66 | * |
67 | * 2. Redistributions in binary form must reproduce the above copyright | |
68 | * notice, this list of conditions and the following disclaimer in | |
69 | * the documentation and/or other materials provided with the | |
70 | * distribution. | |
71 | * | |
72 | * 3. All advertising materials mentioning features or use of this | |
73 | * software must display the following acknowledgment: | |
74 | * "This product includes software developed by the OpenSSL Project | |
75 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
76 | * | |
77 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
78 | * endorse or promote products derived from this software without | |
79 | * prior written permission. For written permission, please contact | |
80 | * openssl-core@openssl.org. | |
81 | * | |
82 | * 5. Products derived from this software may not be called "OpenSSL" | |
83 | * nor may "OpenSSL" appear in their names without prior written | |
84 | * permission of the OpenSSL Project. | |
85 | * | |
86 | * 6. Redistributions of any form whatsoever must retain the following | |
87 | * acknowledgment: | |
88 | * "This product includes software developed by the OpenSSL Project | |
89 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
90 | * | |
91 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
92 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
93 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
94 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
95 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
96 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
97 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
98 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
99 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
100 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
101 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
102 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
103 | * ==================================================================== | |
104 | * | |
105 | * This product includes cryptographic software written by Eric Young | |
106 | * (eay@cryptsoft.com). This product includes software written by Tim | |
107 | * Hudson (tjh@cryptsoft.com). | |
108 | * | |
109 | */ | |
ea262260 BM |
110 | /* ==================================================================== |
111 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. | |
112 | * | |
0f113f3e | 113 | * Portions of the attached software ("Contribution") are developed by |
ea262260 BM |
114 | * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. |
115 | * | |
116 | * The Contribution is licensed pursuant to the OpenSSL open source | |
117 | * license provided above. | |
118 | * | |
ea262260 BM |
119 | * ECC cipher suite support in OpenSSL originally written by |
120 | * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. | |
121 | * | |
122 | */ | |
ddac1974 NL |
123 | /* ==================================================================== |
124 | * Copyright 2005 Nokia. All rights reserved. | |
125 | * | |
126 | * The portions of the attached software ("Contribution") is developed by | |
127 | * Nokia Corporation and is licensed pursuant to the OpenSSL open source | |
128 | * license. | |
129 | * | |
130 | * The Contribution, originally written by Mika Kousa and Pasi Eronen of | |
131 | * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites | |
132 | * support (see RFC 4279) to OpenSSL. | |
133 | * | |
134 | * No patent licenses or other rights except those expressly stated in | |
135 | * the OpenSSL open source license shall be deemed granted or received | |
136 | * expressly, by implication, estoppel, or otherwise. | |
137 | * | |
138 | * No assurances are provided by Nokia that the Contribution does not | |
139 | * infringe the patent or other intellectual property rights of any third | |
140 | * party or that the license provides you with all the necessary rights | |
141 | * to make use of the Contribution. | |
142 | * | |
143 | * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN | |
144 | * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA | |
145 | * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY | |
146 | * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR | |
147 | * OTHERWISE. | |
148 | */ | |
d02b48c6 RE |
149 | |
150 | #include <stdio.h> | |
8ba708e5 | 151 | #include "../ssl_locl.h" |
61ae935a | 152 | #include "statem_locl.h" |
ec577822 BM |
153 | #include <openssl/buffer.h> |
154 | #include <openssl/rand.h> | |
155 | #include <openssl/objects.h> | |
156 | #include <openssl/evp.h> | |
dbad1690 | 157 | #include <openssl/md5.h> |
3c27208f | 158 | #include <openssl/dh.h> |
d095b68d | 159 | #include <openssl/bn.h> |
3c27208f | 160 | #include <openssl/engine.h> |
f9b3bff6 | 161 | |
7ab09630 | 162 | static ossl_inline int cert_req_allowed(SSL *s); |
a455d0f6 | 163 | static int key_exchange_expected(SSL *s); |
0f113f3e | 164 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b); |
d45ba43d | 165 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
e9fa092e | 166 | unsigned char *p); |
ea262260 | 167 | |
61ae935a MC |
168 | |
169 | /* | |
170 | * Is a CertificateRequest message allowed at the moment or not? | |
171 | * | |
172 | * Return values are: | |
173 | * 1: Yes | |
174 | * 0: No | |
175 | */ | |
7ab09630 | 176 | static ossl_inline int cert_req_allowed(SSL *s) |
61ae935a MC |
177 | { |
178 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 MC |
179 | if ((s->version > SSL3_VERSION |
180 | && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)) | |
181 | || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
182 | return 0; |
183 | ||
184 | return 1; | |
185 | } | |
186 | ||
187 | /* | |
a455d0f6 | 188 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
189 | * |
190 | * Return values are: | |
191 | * 1: Yes | |
192 | * 0: No | |
a455d0f6 | 193 | * -1: Error |
61ae935a | 194 | */ |
a455d0f6 | 195 | static int key_exchange_expected(SSL *s) |
61ae935a MC |
196 | { |
197 | long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
198 | ||
199 | /* | |
200 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 201 | * ciphersuite or for SRP |
61ae935a | 202 | */ |
a455d0f6 MC |
203 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
204 | | SSL_kSRP)) { | |
205 | return 1; | |
61ae935a MC |
206 | } |
207 | ||
a455d0f6 | 208 | return 0; |
61ae935a MC |
209 | } |
210 | ||
211 | /* | |
8481f583 MC |
212 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
213 | * handshake state transitions when the client is reading messages from the | |
214 | * server. The message type that the server has sent is provided in |mt|. The | |
215 | * current state is in |s->statem.hand_state|. | |
61ae935a MC |
216 | * |
217 | * Return values are: | |
218 | * 1: Success (transition allowed) | |
219 | * 0: Error (transition not allowed) | |
220 | */ | |
8481f583 | 221 | int ossl_statem_client_read_transition(SSL *s, int mt) |
61ae935a | 222 | { |
d6f1a6e9 | 223 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 224 | int ske_expected; |
61ae935a MC |
225 | |
226 | switch(st->hand_state) { | |
227 | case TLS_ST_CW_CLNT_HELLO: | |
228 | if (mt == SSL3_MT_SERVER_HELLO) { | |
229 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
230 | return 1; | |
231 | } | |
232 | ||
233 | if (SSL_IS_DTLS(s)) { | |
234 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
235 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
236 | return 1; | |
237 | } | |
238 | } | |
239 | break; | |
240 | ||
241 | case TLS_ST_CR_SRVR_HELLO: | |
242 | if (s->hit) { | |
243 | if (s->tlsext_ticket_expected) { | |
244 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
245 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
246 | return 1; | |
247 | } | |
248 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
249 | st->hand_state = TLS_ST_CR_CHANGE; | |
250 | return 1; | |
251 | } | |
252 | } else { | |
253 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
254 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
255 | return 1; | |
ad3819c2 MC |
256 | } else if (s->version >= TLS1_VERSION |
257 | && s->tls_session_secret_cb != NULL | |
258 | && s->session->tlsext_tick != NULL | |
259 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
260 | /* | |
261 | * Normally, we can tell if the server is resuming the session | |
262 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
263 | * the next server message after the ServerHello to determine if | |
264 | * the server is resuming. | |
265 | */ | |
266 | s->hit = 1; | |
267 | st->hand_state = TLS_ST_CR_CHANGE; | |
268 | return 1; | |
61ae935a MC |
269 | } else if (!(s->s3->tmp.new_cipher->algorithm_auth |
270 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { | |
271 | if (mt == SSL3_MT_CERTIFICATE) { | |
272 | st->hand_state = TLS_ST_CR_CERT; | |
273 | return 1; | |
274 | } | |
275 | } else { | |
a455d0f6 MC |
276 | ske_expected = key_exchange_expected(s); |
277 | if (ske_expected < 0) | |
278 | return 0; | |
279 | /* SKE is optional for some PSK ciphersuites */ | |
280 | if (ske_expected | |
281 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) | |
282 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
283 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { | |
284 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
285 | return 1; | |
286 | } | |
287 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
61ae935a MC |
288 | && cert_req_allowed(s)) { |
289 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
290 | return 1; | |
a455d0f6 | 291 | } else if (mt == SSL3_MT_SERVER_DONE) { |
61ae935a MC |
292 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
293 | return 1; | |
61ae935a MC |
294 | } |
295 | } | |
296 | } | |
297 | break; | |
298 | ||
299 | case TLS_ST_CR_CERT: | |
bb1aaab4 MC |
300 | /* |
301 | * The CertificateStatus message is optional even if | |
302 | * |tlsext_status_expected| is set | |
303 | */ | |
304 | if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { | |
305 | st->hand_state = TLS_ST_CR_CERT_STATUS; | |
306 | return 1; | |
a455d0f6 MC |
307 | } |
308 | /* Fall through */ | |
309 | ||
310 | case TLS_ST_CR_CERT_STATUS: | |
311 | ske_expected = key_exchange_expected(s); | |
312 | if (ske_expected < 0) | |
313 | return 0; | |
314 | /* SKE is optional for some PSK ciphersuites */ | |
315 | if (ske_expected | |
316 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) | |
317 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
61ae935a MC |
318 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
319 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
320 | return 1; | |
61ae935a | 321 | } |
a455d0f6 | 322 | return 0; |
61ae935a | 323 | } |
a455d0f6 | 324 | /* Fall through */ |
61ae935a | 325 | |
a455d0f6 MC |
326 | case TLS_ST_CR_KEY_EXCH: |
327 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
328 | if (cert_req_allowed(s)) { | |
61ae935a MC |
329 | st->hand_state = TLS_ST_CR_CERT_REQ; |
330 | return 1; | |
61ae935a | 331 | } |
a455d0f6 | 332 | return 0; |
61ae935a | 333 | } |
a455d0f6 | 334 | /* Fall through */ |
61ae935a MC |
335 | |
336 | case TLS_ST_CR_CERT_REQ: | |
337 | if (mt == SSL3_MT_SERVER_DONE) { | |
338 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
339 | return 1; | |
340 | } | |
341 | break; | |
342 | ||
343 | case TLS_ST_CW_FINISHED: | |
344 | if (mt == SSL3_MT_NEWSESSION_TICKET && s->tlsext_ticket_expected) { | |
345 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
346 | return 1; | |
347 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
348 | st->hand_state = TLS_ST_CR_CHANGE; | |
349 | return 1; | |
350 | } | |
351 | break; | |
352 | ||
353 | case TLS_ST_CR_SESSION_TICKET: | |
354 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
355 | st->hand_state = TLS_ST_CR_CHANGE; | |
356 | return 1; | |
357 | } | |
358 | break; | |
359 | ||
360 | case TLS_ST_CR_CHANGE: | |
361 | if (mt == SSL3_MT_FINISHED) { | |
362 | st->hand_state = TLS_ST_CR_FINISHED; | |
363 | return 1; | |
364 | } | |
365 | break; | |
366 | ||
367 | default: | |
368 | break; | |
369 | } | |
370 | ||
371 | /* No valid transition found */ | |
372 | return 0; | |
373 | } | |
374 | ||
375 | /* | |
376 | * client_write_transition() works out what handshake state to move to next | |
377 | * when the client is writing messages to be sent to the server. | |
378 | */ | |
8481f583 | 379 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 380 | { |
d6f1a6e9 | 381 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
382 | |
383 | switch(st->hand_state) { | |
384 | case TLS_ST_OK: | |
385 | /* Renegotiation - fall through */ | |
386 | case TLS_ST_BEFORE: | |
387 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
388 | return WRITE_TRAN_CONTINUE; | |
389 | ||
390 | case TLS_ST_CW_CLNT_HELLO: | |
391 | /* | |
392 | * No transition at the end of writing because we don't know what | |
393 | * we will be sent | |
394 | */ | |
395 | return WRITE_TRAN_FINISHED; | |
396 | ||
397 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: | |
398 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
399 | return WRITE_TRAN_CONTINUE; | |
400 | ||
401 | case TLS_ST_CR_SRVR_DONE: | |
402 | if (s->s3->tmp.cert_req) | |
403 | st->hand_state = TLS_ST_CW_CERT; | |
404 | else | |
405 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
406 | return WRITE_TRAN_CONTINUE; | |
407 | ||
408 | case TLS_ST_CW_CERT: | |
409 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
410 | return WRITE_TRAN_CONTINUE; | |
411 | ||
412 | case TLS_ST_CW_KEY_EXCH: | |
413 | /* | |
414 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
415 | * sent, but no verify packet is sent | |
416 | */ | |
417 | /* | |
418 | * XXX: For now, we do not support client authentication in ECDH | |
419 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
420 | * need to skip the certificate verify message when client's | |
421 | * ECDH public key is sent inside the client certificate. | |
422 | */ | |
423 | if (s->s3->tmp.cert_req == 1) { | |
424 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
425 | } else { | |
426 | st->hand_state = TLS_ST_CW_CHANGE; | |
427 | } | |
428 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
429 | st->hand_state = TLS_ST_CW_CHANGE; | |
430 | } | |
431 | return WRITE_TRAN_CONTINUE; | |
432 | ||
433 | case TLS_ST_CW_CERT_VRFY: | |
434 | st->hand_state = TLS_ST_CW_CHANGE; | |
435 | return WRITE_TRAN_CONTINUE; | |
436 | ||
437 | case TLS_ST_CW_CHANGE: | |
438 | #if defined(OPENSSL_NO_NEXTPROTONEG) | |
439 | st->hand_state = TLS_ST_CW_FINISHED; | |
440 | #else | |
441 | if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen) | |
442 | st->hand_state = TLS_ST_CW_NEXT_PROTO; | |
443 | else | |
444 | st->hand_state = TLS_ST_CW_FINISHED; | |
445 | #endif | |
446 | return WRITE_TRAN_CONTINUE; | |
447 | ||
448 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
449 | case TLS_ST_CW_NEXT_PROTO: | |
450 | st->hand_state = TLS_ST_CW_FINISHED; | |
451 | return WRITE_TRAN_CONTINUE; | |
452 | #endif | |
453 | ||
454 | case TLS_ST_CW_FINISHED: | |
455 | if (s->hit) { | |
456 | st->hand_state = TLS_ST_OK; | |
fe3a3291 | 457 | ossl_statem_set_in_init(s, 0); |
61ae935a MC |
458 | return WRITE_TRAN_CONTINUE; |
459 | } else { | |
460 | return WRITE_TRAN_FINISHED; | |
461 | } | |
462 | ||
463 | case TLS_ST_CR_FINISHED: | |
464 | if (s->hit) { | |
465 | st->hand_state = TLS_ST_CW_CHANGE; | |
466 | return WRITE_TRAN_CONTINUE; | |
467 | } else { | |
468 | st->hand_state = TLS_ST_OK; | |
fe3a3291 | 469 | ossl_statem_set_in_init(s, 0); |
61ae935a MC |
470 | return WRITE_TRAN_CONTINUE; |
471 | } | |
472 | ||
473 | default: | |
474 | /* Shouldn't happen */ | |
475 | return WRITE_TRAN_ERROR; | |
476 | } | |
477 | } | |
478 | ||
479 | /* | |
480 | * Perform any pre work that needs to be done prior to sending a message from | |
481 | * the client to the server. | |
482 | */ | |
8481f583 | 483 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 484 | { |
d6f1a6e9 | 485 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
486 | |
487 | switch(st->hand_state) { | |
488 | case TLS_ST_CW_CLNT_HELLO: | |
489 | s->shutdown = 0; | |
490 | if (SSL_IS_DTLS(s)) { | |
491 | /* every DTLS ClientHello resets Finished MAC */ | |
492 | ssl3_init_finished_mac(s); | |
493 | } | |
494 | break; | |
495 | ||
496 | case TLS_ST_CW_CERT: | |
497 | return tls_prepare_client_certificate(s, wst); | |
498 | ||
499 | case TLS_ST_CW_CHANGE: | |
500 | if (SSL_IS_DTLS(s)) { | |
501 | if (s->hit) { | |
502 | /* | |
503 | * We're into the last flight so we don't retransmit these | |
504 | * messages unless we need to. | |
505 | */ | |
506 | st->use_timer = 0; | |
507 | } | |
508 | #ifndef OPENSSL_NO_SCTP | |
509 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
510 | return dtls_wait_for_dry(s); | |
511 | #endif | |
512 | } | |
513 | return WORK_FINISHED_CONTINUE; | |
514 | ||
515 | case TLS_ST_OK: | |
516 | return tls_finish_handshake(s, wst); | |
517 | ||
518 | default: | |
519 | /* No pre work to be done */ | |
520 | break; | |
521 | } | |
522 | ||
523 | return WORK_FINISHED_CONTINUE; | |
524 | } | |
525 | ||
526 | /* | |
527 | * Perform any work that needs to be done after sending a message from the | |
528 | * client to the server. | |
529 | */ | |
8481f583 | 530 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 531 | { |
d6f1a6e9 | 532 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
533 | |
534 | s->init_num = 0; | |
535 | ||
536 | switch(st->hand_state) { | |
537 | case TLS_ST_CW_CLNT_HELLO: | |
538 | if (SSL_IS_DTLS(s) && s->d1->cookie_len > 0 && statem_flush(s) != 1) | |
539 | return WORK_MORE_A; | |
540 | #ifndef OPENSSL_NO_SCTP | |
541 | /* Disable buffering for SCTP */ | |
542 | if (!SSL_IS_DTLS(s) || !BIO_dgram_is_sctp(SSL_get_wbio(s))) { | |
543 | #endif | |
544 | /* | |
545 | * turn on buffering for the next lot of output | |
546 | */ | |
547 | if (s->bbio != s->wbio) | |
548 | s->wbio = BIO_push(s->bbio, s->wbio); | |
549 | #ifndef OPENSSL_NO_SCTP | |
550 | } | |
551 | #endif | |
552 | if (SSL_IS_DTLS(s)) { | |
553 | /* Treat the next message as the first packet */ | |
554 | s->first_packet = 1; | |
555 | } | |
556 | break; | |
557 | ||
558 | case TLS_ST_CW_KEY_EXCH: | |
559 | if (tls_client_key_exchange_post_work(s) == 0) | |
560 | return WORK_ERROR; | |
561 | break; | |
562 | ||
563 | case TLS_ST_CW_CHANGE: | |
564 | s->session->cipher = s->s3->tmp.new_cipher; | |
565 | #ifdef OPENSSL_NO_COMP | |
566 | s->session->compress_meth = 0; | |
567 | #else | |
568 | if (s->s3->tmp.new_compression == NULL) | |
569 | s->session->compress_meth = 0; | |
570 | else | |
571 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
572 | #endif | |
573 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
574 | return WORK_ERROR; | |
575 | ||
576 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
577 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
578 | return WORK_ERROR; | |
579 | ||
580 | if (SSL_IS_DTLS(s)) { | |
581 | #ifndef OPENSSL_NO_SCTP | |
582 | if (s->hit) { | |
583 | /* | |
584 | * Change to new shared key of SCTP-Auth, will be ignored if | |
585 | * no SCTP used. | |
586 | */ | |
587 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
588 | 0, NULL); | |
589 | } | |
590 | #endif | |
591 | ||
592 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
593 | } | |
594 | break; | |
595 | ||
596 | case TLS_ST_CW_FINISHED: | |
597 | #ifndef OPENSSL_NO_SCTP | |
598 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
599 | /* | |
600 | * Change to new shared key of SCTP-Auth, will be ignored if | |
601 | * no SCTP used. | |
602 | */ | |
603 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
604 | 0, NULL); | |
605 | } | |
606 | #endif | |
607 | if (statem_flush(s) != 1) | |
608 | return WORK_MORE_B; | |
61ae935a MC |
609 | break; |
610 | ||
611 | default: | |
612 | /* No post work to be done */ | |
613 | break; | |
614 | } | |
615 | ||
616 | return WORK_FINISHED_CONTINUE; | |
617 | } | |
618 | ||
619 | /* | |
620 | * Construct a message to be sent from the client to the server. | |
621 | * | |
622 | * Valid return values are: | |
623 | * 1: Success | |
624 | * 0: Error | |
625 | */ | |
8481f583 | 626 | int ossl_statem_client_construct_message(SSL *s) |
61ae935a | 627 | { |
d6f1a6e9 | 628 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
629 | |
630 | switch(st->hand_state) { | |
631 | case TLS_ST_CW_CLNT_HELLO: | |
632 | return tls_construct_client_hello(s); | |
633 | ||
634 | case TLS_ST_CW_CERT: | |
635 | return tls_construct_client_certificate(s); | |
636 | ||
637 | case TLS_ST_CW_KEY_EXCH: | |
638 | return tls_construct_client_key_exchange(s); | |
639 | ||
640 | case TLS_ST_CW_CERT_VRFY: | |
641 | return tls_construct_client_verify(s); | |
642 | ||
643 | case TLS_ST_CW_CHANGE: | |
644 | if (SSL_IS_DTLS(s)) | |
645 | return dtls_construct_change_cipher_spec(s); | |
646 | else | |
647 | return tls_construct_change_cipher_spec(s); | |
648 | ||
649 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
650 | case TLS_ST_CW_NEXT_PROTO: | |
651 | return tls_construct_next_proto(s); | |
652 | #endif | |
653 | case TLS_ST_CW_FINISHED: | |
654 | return tls_construct_finished(s, | |
655 | s->method-> | |
656 | ssl3_enc->client_finished_label, | |
657 | s->method-> | |
658 | ssl3_enc->client_finished_label_len); | |
659 | ||
660 | default: | |
661 | /* Shouldn't happen */ | |
662 | break; | |
663 | } | |
664 | ||
665 | return 0; | |
666 | } | |
667 | ||
668 | /* | |
669 | * Returns the maximum allowed length for the current message that we are | |
670 | * reading. Excludes the message header. | |
671 | */ | |
8481f583 | 672 | unsigned long ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 673 | { |
d6f1a6e9 | 674 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
675 | |
676 | switch(st->hand_state) { | |
677 | case TLS_ST_CR_SRVR_HELLO: | |
678 | return SERVER_HELLO_MAX_LENGTH; | |
679 | ||
680 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: | |
681 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
682 | ||
683 | case TLS_ST_CR_CERT: | |
684 | return s->max_cert_list; | |
685 | ||
686 | case TLS_ST_CR_CERT_STATUS: | |
687 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
688 | ||
689 | case TLS_ST_CR_KEY_EXCH: | |
690 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
691 | ||
692 | case TLS_ST_CR_CERT_REQ: | |
057b6f79 MC |
693 | /* Set to s->max_cert_list for compatibility with previous releases. |
694 | * In practice these messages can get quite long if servers are | |
695 | * configured to provide a long list of acceptable CAs | |
696 | */ | |
697 | return s->max_cert_list; | |
61ae935a MC |
698 | |
699 | case TLS_ST_CR_SRVR_DONE: | |
700 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
701 | ||
702 | case TLS_ST_CR_CHANGE: | |
703 | return CCS_MAX_LENGTH; | |
704 | ||
705 | case TLS_ST_CR_SESSION_TICKET: | |
706 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
707 | ||
708 | case TLS_ST_CR_FINISHED: | |
709 | return FINISHED_MAX_LENGTH; | |
710 | ||
711 | default: | |
712 | /* Shouldn't happen */ | |
713 | break; | |
714 | } | |
715 | ||
716 | return 0; | |
717 | } | |
718 | ||
719 | /* | |
720 | * Process a message that the client has been received from the server. | |
721 | */ | |
8481f583 | 722 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 723 | { |
d6f1a6e9 | 724 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
725 | |
726 | switch(st->hand_state) { | |
727 | case TLS_ST_CR_SRVR_HELLO: | |
728 | return tls_process_server_hello(s, pkt); | |
729 | ||
730 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: | |
731 | return dtls_process_hello_verify(s, pkt); | |
732 | ||
733 | case TLS_ST_CR_CERT: | |
734 | return tls_process_server_certificate(s, pkt); | |
735 | ||
736 | case TLS_ST_CR_CERT_STATUS: | |
737 | return tls_process_cert_status(s, pkt); | |
738 | ||
739 | case TLS_ST_CR_KEY_EXCH: | |
740 | return tls_process_key_exchange(s, pkt); | |
741 | ||
742 | case TLS_ST_CR_CERT_REQ: | |
743 | return tls_process_certificate_request(s, pkt); | |
744 | ||
745 | case TLS_ST_CR_SRVR_DONE: | |
746 | return tls_process_server_done(s, pkt); | |
747 | ||
748 | case TLS_ST_CR_CHANGE: | |
749 | return tls_process_change_cipher_spec(s, pkt); | |
750 | ||
751 | case TLS_ST_CR_SESSION_TICKET: | |
752 | return tls_process_new_session_ticket(s, pkt); | |
753 | ||
754 | case TLS_ST_CR_FINISHED: | |
755 | return tls_process_finished(s, pkt); | |
756 | ||
757 | default: | |
758 | /* Shouldn't happen */ | |
759 | break; | |
760 | } | |
761 | ||
762 | return MSG_PROCESS_ERROR; | |
763 | } | |
764 | ||
765 | /* | |
766 | * Perform any further processing required following the receipt of a message | |
767 | * from the server | |
768 | */ | |
8481f583 | 769 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 770 | { |
d6f1a6e9 | 771 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
772 | |
773 | switch(st->hand_state) { | |
774 | #ifndef OPENSSL_NO_SCTP | |
775 | case TLS_ST_CR_SRVR_DONE: | |
776 | /* We only get here if we are using SCTP and we are renegotiating */ | |
777 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) { | |
778 | s->s3->in_read_app_data = 2; | |
779 | s->rwstate = SSL_READING; | |
780 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
781 | BIO_set_retry_read(SSL_get_rbio(s)); | |
fe3a3291 | 782 | ossl_statem_set_sctp_read_sock(s, 1); |
61ae935a MC |
783 | return WORK_MORE_A; |
784 | } | |
fe3a3291 | 785 | ossl_statem_set_sctp_read_sock(s, 0); |
61ae935a MC |
786 | return WORK_FINISHED_STOP; |
787 | #endif | |
788 | ||
61ae935a MC |
789 | default: |
790 | break; | |
791 | } | |
792 | ||
793 | /* Shouldn't happen */ | |
794 | return WORK_ERROR; | |
795 | } | |
796 | ||
b9908bf9 | 797 | int tls_construct_client_hello(SSL *s) |
0f113f3e MC |
798 | { |
799 | unsigned char *buf; | |
800 | unsigned char *p, *d; | |
801 | int i; | |
4fa52141 | 802 | int protverr; |
0f113f3e MC |
803 | unsigned long l; |
804 | int al = 0; | |
09b6c2ef | 805 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
806 | int j; |
807 | SSL_COMP *comp; | |
808 | #endif | |
b9908bf9 | 809 | SSL_SESSION *sess = s->session; |
0f113f3e MC |
810 | |
811 | buf = (unsigned char *)s->init_buf->data; | |
0f113f3e | 812 | |
b9908bf9 | 813 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
814 | protverr = ssl_set_client_hello_version(s); |
815 | if (protverr != 0) { | |
816 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr); | |
b9908bf9 | 817 | goto err; |
4fa52141 | 818 | } |
0f113f3e | 819 | |
ccae4a15 FI |
820 | if ((sess == NULL) || |
821 | !ssl_version_supported(s, sess->ssl_version) || | |
0f113f3e | 822 | /* |
b9908bf9 MC |
823 | * In the case of EAP-FAST, we can have a pre-shared |
824 | * "ticket" without a session ID. | |
0f113f3e | 825 | */ |
b9908bf9 MC |
826 | (!sess->session_id_length && !sess->tlsext_tick) || |
827 | (sess->not_resumable)) { | |
828 | if (!ssl_get_new_session(s, 0)) | |
e1b568dd | 829 | goto err; |
b9908bf9 MC |
830 | } |
831 | /* else use the pre-loaded session */ | |
0f113f3e | 832 | |
b9908bf9 | 833 | p = s->s3->client_random; |
0f113f3e | 834 | |
b9908bf9 MC |
835 | /* |
836 | * for DTLS if client_random is initialized, reuse it, we are | |
837 | * required to use same upon reply to HelloVerify | |
838 | */ | |
839 | if (SSL_IS_DTLS(s)) { | |
840 | size_t idx; | |
841 | i = 1; | |
842 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
843 | if (p[idx]) { | |
844 | i = 0; | |
845 | break; | |
0f113f3e | 846 | } |
0f113f3e | 847 | } |
b9908bf9 MC |
848 | } else |
849 | i = 1; | |
0f113f3e | 850 | |
b9908bf9 MC |
851 | if (i && ssl_fill_hello_random(s, 0, p, |
852 | sizeof(s->s3->client_random)) <= 0) | |
853 | goto err; | |
854 | ||
855 | /* Do the message type and length last */ | |
856 | d = p = ssl_handshake_start(s); | |
857 | ||
858 | /*- | |
859 | * version indicates the negotiated version: for example from | |
860 | * an SSLv2/v3 compatible client hello). The client_version | |
861 | * field is the maximum version we permit and it is also | |
862 | * used in RSA encrypted premaster secrets. Some servers can | |
863 | * choke if we initially report a higher version then | |
864 | * renegotiate to a lower one in the premaster secret. This | |
865 | * didn't happen with TLS 1.0 as most servers supported it | |
866 | * but it can with TLS 1.1 or later if the server only supports | |
867 | * 1.0. | |
868 | * | |
869 | * Possible scenario with previous logic: | |
870 | * 1. Client hello indicates TLS 1.2 | |
871 | * 2. Server hello says TLS 1.0 | |
872 | * 3. RSA encrypted premaster secret uses 1.2. | |
8483a003 | 873 | * 4. Handshake proceeds using TLS 1.0. |
b9908bf9 MC |
874 | * 5. Server sends hello request to renegotiate. |
875 | * 6. Client hello indicates TLS v1.0 as we now | |
876 | * know that is maximum server supports. | |
877 | * 7. Server chokes on RSA encrypted premaster secret | |
878 | * containing version 1.0. | |
879 | * | |
880 | * For interoperability it should be OK to always use the | |
881 | * maximum version we support in client hello and then rely | |
882 | * on the checking of version to ensure the servers isn't | |
883 | * being inconsistent: for example initially negotiating with | |
884 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
885 | * client_version in client hello and not resetting it to | |
886 | * the negotiated version. | |
887 | */ | |
888 | *(p++) = s->client_version >> 8; | |
889 | *(p++) = s->client_version & 0xff; | |
890 | ||
891 | /* Random stuff */ | |
892 | memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); | |
893 | p += SSL3_RANDOM_SIZE; | |
894 | ||
895 | /* Session ID */ | |
896 | if (s->new_session) | |
897 | i = 0; | |
898 | else | |
899 | i = s->session->session_id_length; | |
900 | *(p++) = i; | |
901 | if (i != 0) { | |
902 | if (i > (int)sizeof(s->session->session_id)) { | |
903 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
904 | goto err; | |
0f113f3e | 905 | } |
b9908bf9 MC |
906 | memcpy(p, s->session->session_id, i); |
907 | p += i; | |
908 | } | |
0f113f3e | 909 | |
b9908bf9 MC |
910 | /* cookie stuff for DTLS */ |
911 | if (SSL_IS_DTLS(s)) { | |
912 | if (s->d1->cookie_len > sizeof(s->d1->cookie)) { | |
913 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
914 | goto err; |
915 | } | |
b9908bf9 MC |
916 | *(p++) = s->d1->cookie_len; |
917 | memcpy(p, s->d1->cookie, s->d1->cookie_len); | |
918 | p += s->d1->cookie_len; | |
919 | } | |
920 | ||
921 | /* Ciphers supported */ | |
922 | i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2])); | |
923 | if (i == 0) { | |
924 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); | |
925 | goto err; | |
926 | } | |
800e1cd9 | 927 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
b9908bf9 MC |
928 | /* |
929 | * Some servers hang if client hello > 256 bytes as hack workaround | |
930 | * chop number of supported ciphers to keep it well below this if we | |
931 | * use TLS v1.2 | |
932 | */ | |
933 | if (TLS1_get_version(s) >= TLS1_2_VERSION | |
934 | && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) | |
935 | i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
0f113f3e | 936 | #endif |
b9908bf9 MC |
937 | s2n(i, p); |
938 | p += i; | |
0f113f3e | 939 | |
b9908bf9 | 940 | /* COMPRESSION */ |
09b6c2ef | 941 | #ifdef OPENSSL_NO_COMP |
b9908bf9 | 942 | *(p++) = 1; |
09b6c2ef | 943 | #else |
566dda07 | 944 | |
b9908bf9 MC |
945 | if (!ssl_allow_compression(s) || !s->ctx->comp_methods) |
946 | j = 0; | |
947 | else | |
948 | j = sk_SSL_COMP_num(s->ctx->comp_methods); | |
949 | *(p++) = 1 + j; | |
950 | for (i = 0; i < j; i++) { | |
951 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
952 | *(p++) = comp->id; | |
953 | } | |
09b6c2ef | 954 | #endif |
b9908bf9 | 955 | *(p++) = 0; /* Add the NULL method */ |
761772d7 | 956 | |
b9908bf9 MC |
957 | /* TLS extensions */ |
958 | if (ssl_prepare_clienthello_tlsext(s) <= 0) { | |
959 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); | |
960 | goto err; | |
961 | } | |
962 | if ((p = | |
963 | ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH, | |
964 | &al)) == NULL) { | |
965 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
966 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
967 | goto err; | |
968 | } | |
0f113f3e | 969 | |
b9908bf9 MC |
970 | l = p - d; |
971 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) { | |
972 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
973 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
974 | goto err; | |
0f113f3e MC |
975 | } |
976 | ||
b9908bf9 | 977 | return 1; |
0f113f3e | 978 | err: |
fe3a3291 | 979 | ossl_statem_set_error(s); |
b9908bf9 | 980 | return 0; |
0f113f3e | 981 | } |
d02b48c6 | 982 | |
be3583fa | 983 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 MC |
984 | { |
985 | int al; | |
986 | unsigned int cookie_len; | |
987 | PACKET cookiepkt; | |
988 | ||
989 | if (!PACKET_forward(pkt, 2) | |
990 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { | |
991 | al = SSL_AD_DECODE_ERROR; | |
992 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
993 | goto f_err; | |
994 | } | |
995 | ||
996 | cookie_len = PACKET_remaining(&cookiepkt); | |
997 | if (cookie_len > sizeof(s->d1->cookie)) { | |
998 | al = SSL_AD_ILLEGAL_PARAMETER; | |
999 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG); | |
1000 | goto f_err; | |
1001 | } | |
1002 | ||
1003 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
1004 | al = SSL_AD_DECODE_ERROR; | |
1005 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1006 | goto f_err; | |
1007 | } | |
1008 | s->d1->cookie_len = cookie_len; | |
1009 | ||
1010 | return MSG_PROCESS_FINISHED_READING; | |
1011 | f_err: | |
1012 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1013 | ossl_statem_set_error(s); |
8ba708e5 MC |
1014 | return MSG_PROCESS_ERROR; |
1015 | } | |
1016 | ||
be3583fa | 1017 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1018 | { |
1019 | STACK_OF(SSL_CIPHER) *sk; | |
1020 | const SSL_CIPHER *c; | |
73999b62 | 1021 | PACKET session_id; |
b9908bf9 | 1022 | size_t session_id_len; |
b6981744 | 1023 | const unsigned char *cipherchars; |
b9908bf9 MC |
1024 | int i, al = SSL_AD_INTERNAL_ERROR; |
1025 | unsigned int compression; | |
4fa52141 VD |
1026 | unsigned int sversion; |
1027 | int protverr; | |
b9908bf9 MC |
1028 | #ifndef OPENSSL_NO_COMP |
1029 | SSL_COMP *comp; | |
1030 | #endif | |
1031 | ||
4fa52141 VD |
1032 | if (!PACKET_get_net_2(pkt, &sversion)) { |
1033 | al = SSL_AD_DECODE_ERROR; | |
1034 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1035 | goto f_err; | |
1036 | } | |
50932c4a | 1037 | |
4fa52141 VD |
1038 | protverr = ssl_choose_client_version(s, sversion); |
1039 | if (protverr != 0) { | |
1040 | al = SSL_AD_PROTOCOL_VERSION; | |
1041 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr); | |
1042 | goto f_err; | |
0f113f3e | 1043 | } |
0f113f3e MC |
1044 | |
1045 | /* load the server hello data */ | |
1046 | /* load the server random */ | |
73999b62 | 1047 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { |
50932c4a | 1048 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1049 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1050 | goto f_err; |
1051 | } | |
0f113f3e MC |
1052 | |
1053 | s->hit = 0; | |
1054 | ||
fc5ce51d | 1055 | /* Get the session-id. */ |
73999b62 | 1056 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { |
fc5ce51d | 1057 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 1058 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1059 | goto f_err; |
1060 | } | |
1061 | session_id_len = PACKET_remaining(&session_id); | |
1062 | if (session_id_len > sizeof s->session->session_id | |
1063 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
0f113f3e | 1064 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1065 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG); |
0f113f3e MC |
1066 | goto f_err; |
1067 | } | |
e481f9b9 | 1068 | |
73999b62 | 1069 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f0659bdb | 1070 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1071 | al = SSL_AD_DECODE_ERROR; |
1072 | goto f_err; | |
1073 | } | |
1074 | ||
0f113f3e | 1075 | /* |
6e3d0153 EK |
1076 | * Check if we can resume the session based on external pre-shared secret. |
1077 | * EAP-FAST (RFC 4851) supports two types of session resumption. | |
1078 | * Resumption based on server-side state works with session IDs. | |
1079 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1080 | * works by overriding the SessionTicket extension at the application | |
1081 | * layer, and does not send a session ID. (We do not know whether EAP-FAST | |
1082 | * servers would honour the session ID.) Therefore, the session ID alone | |
1083 | * is not a reliable indicator of session resumption, so we first check if | |
1084 | * we can resume, and later peek at the next handshake message to see if the | |
1085 | * server wants to resume. | |
0f113f3e | 1086 | */ |
6e3d0153 EK |
1087 | if (s->version >= TLS1_VERSION && s->tls_session_secret_cb && |
1088 | s->session->tlsext_tick) { | |
4a640fb6 | 1089 | const SSL_CIPHER *pref_cipher = NULL; |
0f113f3e MC |
1090 | s->session->master_key_length = sizeof(s->session->master_key); |
1091 | if (s->tls_session_secret_cb(s, s->session->master_key, | |
1092 | &s->session->master_key_length, | |
1093 | NULL, &pref_cipher, | |
1094 | s->tls_session_secret_cb_arg)) { | |
1095 | s->session->cipher = pref_cipher ? | |
50932c4a | 1096 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars); |
6e3d0153 | 1097 | } else { |
b9908bf9 | 1098 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); |
6e3d0153 EK |
1099 | al = SSL_AD_INTERNAL_ERROR; |
1100 | goto f_err; | |
0f113f3e | 1101 | } |
50932c4a MC |
1102 | } |
1103 | ||
fc5ce51d EK |
1104 | if (session_id_len != 0 && session_id_len == s->session->session_id_length |
1105 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1106 | session_id_len) == 0) { | |
0f113f3e MC |
1107 | if (s->sid_ctx_length != s->session->sid_ctx_length |
1108 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { | |
1109 | /* actually a client application bug */ | |
1110 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1111 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1112 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1113 | goto f_err; | |
1114 | } | |
1115 | s->hit = 1; | |
6e3d0153 | 1116 | } else { |
0f113f3e | 1117 | /* |
6e3d0153 EK |
1118 | * If we were trying for session-id reuse but the server |
1119 | * didn't echo the ID, make a new SSL_SESSION. | |
1120 | * In the case of EAP-FAST and PAC, we do not send a session ID, | |
1121 | * so the PAC-based session secret is always preserved. It'll be | |
1122 | * overwritten if the server refuses resumption. | |
0f113f3e MC |
1123 | */ |
1124 | if (s->session->session_id_length > 0) { | |
1125 | if (!ssl_get_new_session(s, 0)) { | |
1126 | goto f_err; | |
1127 | } | |
1128 | } | |
50932c4a | 1129 | |
ccae4a15 | 1130 | s->session->ssl_version = s->version; |
fc5ce51d EK |
1131 | s->session->session_id_length = session_id_len; |
1132 | /* session_id_len could be 0 */ | |
1133 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1134 | session_id_len); | |
0f113f3e | 1135 | } |
fc5ce51d | 1136 | |
ccae4a15 FI |
1137 | /* Session version and negotiated protocol version should match */ |
1138 | if (s->version != s->session->ssl_version) { | |
1139 | al = SSL_AD_PROTOCOL_VERSION; | |
1140 | ||
1141 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, | |
1142 | SSL_R_SSL_SESSION_VERSION_MISMATCH); | |
1143 | goto f_err; | |
1144 | } | |
1145 | ||
50932c4a | 1146 | c = ssl_get_cipher_by_char(s, cipherchars); |
0f113f3e MC |
1147 | if (c == NULL) { |
1148 | /* unknown cipher */ | |
1149 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1150 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); |
0f113f3e MC |
1151 | goto f_err; |
1152 | } | |
0f113f3e | 1153 | /* |
3eb2aff4 KR |
1154 | * Now that we know the version, update the check to see if it's an allowed |
1155 | * version. | |
1156 | */ | |
1157 | s->s3->tmp.min_ver = s->version; | |
1158 | s->s3->tmp.max_ver = s->version; | |
1159 | /* | |
1160 | * If it is a disabled cipher we either didn't send it in client hello, | |
1161 | * or it's not allowed for the selected protocol. So we return an error. | |
0f113f3e MC |
1162 | */ |
1163 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
1164 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1165 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1166 | goto f_err; |
1167 | } | |
0f113f3e MC |
1168 | |
1169 | sk = ssl_get_ciphers_by_id(s); | |
1170 | i = sk_SSL_CIPHER_find(sk, c); | |
1171 | if (i < 0) { | |
1172 | /* we did not say we would use this cipher */ | |
1173 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1174 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1175 | goto f_err; |
1176 | } | |
1177 | ||
1178 | /* | |
1179 | * Depending on the session caching (internal/external), the cipher | |
1180 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1181 | * set and use it for comparison. | |
1182 | */ | |
1183 | if (s->session->cipher) | |
1184 | s->session->cipher_id = s->session->cipher->id; | |
1185 | if (s->hit && (s->session->cipher_id != c->id)) { | |
9e9858d1 | 1186 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1187 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
9e9858d1 RS |
1188 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
1189 | goto f_err; | |
0f113f3e MC |
1190 | } |
1191 | s->s3->tmp.new_cipher = c; | |
0f113f3e MC |
1192 | /* lets get the compression algorithm */ |
1193 | /* COMPRESSION */ | |
73999b62 | 1194 | if (!PACKET_get_1(pkt, &compression)) { |
f0659bdb | 1195 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1196 | al = SSL_AD_DECODE_ERROR; |
1197 | goto f_err; | |
1198 | } | |
09b6c2ef | 1199 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1200 | if (compression != 0) { |
0f113f3e | 1201 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1202 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1203 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1204 | goto f_err; | |
1205 | } | |
1206 | /* | |
1207 | * If compression is disabled we'd better not try to resume a session | |
1208 | * using compression. | |
1209 | */ | |
1210 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 1211 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
1212 | goto f_err; |
1213 | } | |
09b6c2ef | 1214 | #else |
fc5ce51d | 1215 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 1216 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1217 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1218 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
1219 | goto f_err; | |
1220 | } | |
fc5ce51d | 1221 | if (compression == 0) |
0f113f3e MC |
1222 | comp = NULL; |
1223 | else if (!ssl_allow_compression(s)) { | |
1224 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1225 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 1226 | goto f_err; |
fc5ce51d EK |
1227 | } else { |
1228 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1229 | } | |
0f113f3e | 1230 | |
fc5ce51d | 1231 | if (compression != 0 && comp == NULL) { |
0f113f3e | 1232 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1233 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1234 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1235 | goto f_err; | |
1236 | } else { | |
1237 | s->s3->tmp.new_compression = comp; | |
1238 | } | |
09b6c2ef | 1239 | #endif |
761772d7 | 1240 | |
0f113f3e | 1241 | /* TLS extensions */ |
73999b62 | 1242 | if (!ssl_parse_serverhello_tlsext(s, pkt)) { |
b9908bf9 | 1243 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT); |
0f113f3e MC |
1244 | goto err; |
1245 | } | |
0f113f3e | 1246 | |
73999b62 | 1247 | if (PACKET_remaining(pkt) != 0) { |
0f113f3e MC |
1248 | /* wrong packet length */ |
1249 | al = SSL_AD_DECODE_ERROR; | |
b9908bf9 | 1250 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH); |
0f113f3e MC |
1251 | goto f_err; |
1252 | } | |
1253 | ||
8723588e MC |
1254 | #ifndef OPENSSL_NO_SCTP |
1255 | if (SSL_IS_DTLS(s) && s->hit) { | |
1256 | unsigned char sctpauthkey[64]; | |
1257 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1258 | ||
1259 | /* | |
1260 | * Add new shared key for SCTP-Auth, will be ignored if | |
1261 | * no SCTP used. | |
1262 | */ | |
141eb8c6 MC |
1263 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1264 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1265 | |
1266 | if (SSL_export_keying_material(s, sctpauthkey, | |
1267 | sizeof(sctpauthkey), | |
1268 | labelbuffer, | |
1269 | sizeof(labelbuffer), NULL, 0, | |
1270 | 0) <= 0) | |
1271 | goto err; | |
1272 | ||
1273 | BIO_ctrl(SSL_get_wbio(s), | |
1274 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1275 | sizeof(sctpauthkey), sctpauthkey); | |
1276 | } | |
1277 | #endif | |
1278 | ||
b9908bf9 | 1279 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1280 | f_err: |
1281 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1282 | err: | |
fe3a3291 | 1283 | ossl_statem_set_error(s); |
b9908bf9 | 1284 | return MSG_PROCESS_ERROR; |
0f113f3e | 1285 | } |
d02b48c6 | 1286 | |
be3583fa | 1287 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1288 | { |
1289 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
1290 | unsigned long cert_list_len, cert_len; | |
1291 | X509 *x = NULL; | |
b6981744 | 1292 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1293 | STACK_OF(X509) *sk = NULL; |
1294 | EVP_PKEY *pkey = NULL; | |
0f113f3e MC |
1295 | |
1296 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1297 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1298 | goto err; |
0f113f3e MC |
1299 | } |
1300 | ||
73999b62 MC |
1301 | if (!PACKET_get_net_3(pkt, &cert_list_len) |
1302 | || PACKET_remaining(pkt) != cert_list_len) { | |
0f113f3e | 1303 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1304 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1305 | goto f_err; |
1306 | } | |
73999b62 MC |
1307 | while (PACKET_remaining(pkt)) { |
1308 | if (!PACKET_get_net_3(pkt, &cert_len) | |
1309 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { | |
0f113f3e | 1310 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1311 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1312 | SSL_R_CERT_LENGTH_MISMATCH); |
1313 | goto f_err; | |
1314 | } | |
1315 | ||
df758a85 MC |
1316 | certstart = certbytes; |
1317 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1318 | if (x == NULL) { |
1319 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1320 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1321 | goto f_err; |
1322 | } | |
df758a85 | 1323 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1324 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1325 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1326 | SSL_R_CERT_LENGTH_MISMATCH); |
1327 | goto f_err; | |
1328 | } | |
1329 | if (!sk_X509_push(sk, x)) { | |
b9908bf9 | 1330 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1331 | goto err; |
0f113f3e MC |
1332 | } |
1333 | x = NULL; | |
0f113f3e MC |
1334 | } |
1335 | ||
1336 | i = ssl_verify_cert_chain(s, sk); | |
c636c1c4 | 1337 | if ((s->verify_mode & SSL_VERIFY_PEER) && i <= 0) { |
0f113f3e | 1338 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1339 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1340 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1341 | goto f_err; | |
1342 | } | |
1343 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1344 | if (i > 1) { | |
b9908bf9 | 1345 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1346 | al = SSL_AD_HANDSHAKE_FAILURE; |
1347 | goto f_err; | |
1348 | } | |
1349 | ||
c34b0f99 | 1350 | s->session->peer_chain = sk; |
0f113f3e MC |
1351 | /* |
1352 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
1353 | * which we don't include in s3_srvr.c | |
1354 | */ | |
1355 | x = sk_X509_value(sk, 0); | |
1356 | sk = NULL; | |
1357 | /* | |
1358 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1359 | */ | |
1360 | ||
8382fd3a | 1361 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1362 | |
55a9a16f | 1363 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
1364 | x = NULL; |
1365 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1366 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1367 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1368 | goto f_err; | |
1369 | } | |
1370 | ||
1371 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1372 | if (i < 0) { |
0f113f3e MC |
1373 | x = NULL; |
1374 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1375 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1376 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1377 | goto f_err; | |
1378 | } | |
1379 | ||
55a9a16f | 1380 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); |
e44380a9 DB |
1381 | if (exp_idx >= 0 && i != exp_idx |
1382 | && (exp_idx != SSL_PKEY_GOST_EC || | |
1383 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256 | |
1384 | && i != SSL_PKEY_GOST01))) { | |
55a9a16f MC |
1385 | x = NULL; |
1386 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1387 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
55a9a16f MC |
1388 | SSL_R_WRONG_CERTIFICATE_TYPE); |
1389 | goto f_err; | |
0f113f3e | 1390 | } |
a273c6ee | 1391 | s->session->peer_type = i; |
55a9a16f MC |
1392 | |
1393 | X509_free(s->session->peer); | |
05f0fb9f | 1394 | X509_up_ref(x); |
55a9a16f | 1395 | s->session->peer = x; |
0f113f3e MC |
1396 | s->session->verify_result = s->verify_result; |
1397 | ||
1398 | x = NULL; | |
b9908bf9 | 1399 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1400 | goto done; |
1401 | ||
0f113f3e | 1402 | f_err: |
66696478 | 1403 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1404 | err: |
fe3a3291 | 1405 | ossl_statem_set_error(s); |
66696478 | 1406 | done: |
0f113f3e MC |
1407 | X509_free(x); |
1408 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1409 | return ret; |
0f113f3e | 1410 | } |
d02b48c6 | 1411 | |
be3583fa | 1412 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 1413 | { |
6e59a892 | 1414 | EVP_MD_CTX *md_ctx; |
192e4bbb | 1415 | int al, j; |
b9908bf9 MC |
1416 | long alg_k, alg_a; |
1417 | EVP_PKEY *pkey = NULL; | |
1418 | const EVP_MD *md = NULL; | |
1419 | #ifndef OPENSSL_NO_RSA | |
1420 | RSA *rsa = NULL; | |
1421 | #endif | |
b9908bf9 | 1422 | #ifndef OPENSSL_NO_EC |
61dd9f7a | 1423 | EVP_PKEY_CTX *pctx = NULL; |
b9908bf9 | 1424 | #endif |
73999b62 | 1425 | PACKET save_param_start, signature; |
b9908bf9 | 1426 | |
bfb0641f | 1427 | md_ctx = EVP_MD_CTX_new(); |
6e59a892 RL |
1428 | if (md_ctx == NULL) { |
1429 | al = SSL_AD_INTERNAL_ERROR; | |
1430 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
1431 | goto f_err; | |
1432 | } | |
b9908bf9 MC |
1433 | |
1434 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
1435 | ||
73999b62 | 1436 | save_param_start = *pkt; |
8d92c1f8 | 1437 | |
fb79abe3 | 1438 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
1439 | EVP_PKEY_free(s->s3->peer_tmp); |
1440 | s->s3->peer_tmp = NULL; | |
d02b48c6 | 1441 | #endif |
8d92c1f8 | 1442 | |
0f113f3e | 1443 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; |
d02b48c6 | 1444 | |
0f113f3e | 1445 | al = SSL_AD_DECODE_ERROR; |
f2be92b9 | 1446 | |
ddac1974 | 1447 | #ifndef OPENSSL_NO_PSK |
7689082b DSH |
1448 | /* PSK ciphersuites are preceded by an identity hint */ |
1449 | if (alg_k & SSL_PSK) { | |
32942870 | 1450 | PACKET psk_identity_hint; |
73999b62 | 1451 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { |
f0659bdb | 1452 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1453 | goto f_err; |
1454 | } | |
0f113f3e MC |
1455 | |
1456 | /* | |
1457 | * Store PSK identity hint for later use, hint is used in | |
1458 | * ssl3_send_client_key_exchange. Assume that the maximum length of | |
1459 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1460 | * identity. | |
1461 | */ | |
32942870 | 1462 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { |
0f113f3e | 1463 | al = SSL_AD_HANDSHAKE_FAILURE; |
b9908bf9 | 1464 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG); |
0f113f3e MC |
1465 | goto f_err; |
1466 | } | |
8098fc56 | 1467 | |
558ceae7 DSH |
1468 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1469 | OPENSSL_free(s->session->psk_identity_hint); | |
1470 | s->session->psk_identity_hint = NULL; | |
1471 | } else if (!PACKET_strndup(&psk_identity_hint, | |
32942870 EK |
1472 | &s->session->psk_identity_hint)) { |
1473 | al = SSL_AD_INTERNAL_ERROR; | |
1474 | goto f_err; | |
0f113f3e | 1475 | } |
7689082b DSH |
1476 | } |
1477 | ||
1478 | /* Nothing else to do for plain PSK or RSAPSK */ | |
1479 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
0f113f3e MC |
1480 | } else |
1481 | #endif /* !OPENSSL_NO_PSK */ | |
bbf431cb MC |
1482 | /* |
1483 | * Dummy "if" to ensure sane C code in the event of various OPENSSL_NO_* | |
1484 | * options | |
1485 | */ | |
1486 | if (0) { | |
1487 | } | |
edc032b5 | 1488 | #ifndef OPENSSL_NO_SRP |
bbf431cb | 1489 | else if (alg_k & SSL_kSRP) { |
32942870 | 1490 | PACKET prime, generator, salt, server_pub; |
73999b62 MC |
1491 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1492 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1493 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1494 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
f0659bdb | 1495 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1496 | goto f_err; |
1497 | } | |
0f113f3e | 1498 | |
32942870 EK |
1499 | if ((s->srp_ctx.N = |
1500 | BN_bin2bn(PACKET_data(&prime), | |
1501 | PACKET_remaining(&prime), NULL)) == NULL | |
1502 | || (s->srp_ctx.g = | |
1503 | BN_bin2bn(PACKET_data(&generator), | |
1504 | PACKET_remaining(&generator), NULL)) == NULL | |
1505 | || (s->srp_ctx.s = | |
1506 | BN_bin2bn(PACKET_data(&salt), | |
1507 | PACKET_remaining(&salt), NULL)) == NULL | |
1508 | || (s->srp_ctx.B = | |
1509 | BN_bin2bn(PACKET_data(&server_pub), | |
1510 | PACKET_remaining(&server_pub), NULL)) == NULL) { | |
f0659bdb | 1511 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB); |
0f113f3e MC |
1512 | goto err; |
1513 | } | |
0f113f3e MC |
1514 | |
1515 | if (!srp_verify_server_param(s, &al)) { | |
b9908bf9 | 1516 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS); |
0f113f3e MC |
1517 | goto f_err; |
1518 | } | |
0989790b | 1519 | |
edc032b5 | 1520 | /* We must check if there is a certificate */ |
8df53b7a | 1521 | if (alg_a & (SSL_aRSA|SSL_aDSS)) |
8382fd3a | 1522 | pkey = X509_get0_pubkey(s->session->peer); |
0f113f3e | 1523 | } |
361a1191 | 1524 | #endif /* !OPENSSL_NO_SRP */ |
bc36ee62 | 1525 | #ifndef OPENSSL_NO_DH |
7689082b | 1526 | else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
32942870 | 1527 | PACKET prime, generator, pub_key; |
ee85fc1d | 1528 | EVP_PKEY *peer_tmp = NULL; |
0f113f3e | 1529 | |
ee85fc1d MC |
1530 | DH *dh = NULL; |
1531 | BIGNUM *p = NULL, *g = NULL, *bnpub_key = NULL; | |
fb79abe3 | 1532 | |
73999b62 MC |
1533 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1534 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1535 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
f0659bdb | 1536 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1537 | goto f_err; |
1538 | } | |
0f113f3e | 1539 | |
ee85fc1d | 1540 | peer_tmp = EVP_PKEY_new(); |
fb79abe3 DSH |
1541 | dh = DH_new(); |
1542 | ||
ee85fc1d MC |
1543 | if (peer_tmp == NULL || dh == NULL) { |
1544 | al = SSL_AD_INTERNAL_ERROR; | |
fb79abe3 | 1545 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); |
ee85fc1d | 1546 | goto dherr; |
0f113f3e | 1547 | } |
0f113f3e | 1548 | |
0aeddcfa MC |
1549 | p = BN_bin2bn(PACKET_data(&prime), PACKET_remaining(&prime), NULL); |
1550 | g = BN_bin2bn(PACKET_data(&generator), PACKET_remaining(&generator), | |
1551 | NULL); | |
1552 | bnpub_key = BN_bin2bn(PACKET_data(&pub_key), PACKET_remaining(&pub_key), | |
1553 | NULL); | |
1554 | if (p == NULL || g == NULL || bnpub_key == NULL) { | |
f0659bdb | 1555 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB); |
ee85fc1d | 1556 | goto dherr; |
0f113f3e | 1557 | } |
0f113f3e | 1558 | |
0aeddcfa | 1559 | if (BN_is_zero(p) || BN_is_zero(g) || BN_is_zero(bnpub_key)) { |
f0659bdb | 1560 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_DH_VALUE); |
ee85fc1d | 1561 | goto dherr; |
61e72d76 GL |
1562 | } |
1563 | ||
0aeddcfa | 1564 | if (!DH_set0_pqg(dh, p, NULL, g)) { |
ee85fc1d | 1565 | al = SSL_AD_INTERNAL_ERROR; |
0aeddcfa | 1566 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB); |
ee85fc1d | 1567 | goto dherr; |
0aeddcfa MC |
1568 | } |
1569 | ||
1570 | if (!DH_set0_key(dh, bnpub_key, NULL)) { | |
ee85fc1d | 1571 | al = SSL_AD_INTERNAL_ERROR; |
0aeddcfa | 1572 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB); |
ee85fc1d | 1573 | goto dherr; |
0aeddcfa MC |
1574 | } |
1575 | ||
0f113f3e MC |
1576 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { |
1577 | al = SSL_AD_HANDSHAKE_FAILURE; | |
b9908bf9 | 1578 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL); |
ee85fc1d MC |
1579 | goto dherr; |
1580 | } | |
1581 | ||
1582 | if (EVP_PKEY_assign_DH(peer_tmp, dh) == 0) { | |
1583 | al = SSL_AD_INTERNAL_ERROR; | |
1584 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
1585 | goto dherr; | |
0f113f3e | 1586 | } |
ee85fc1d MC |
1587 | |
1588 | s->s3->peer_tmp = peer_tmp; | |
1589 | ||
1590 | goto dhend; | |
1591 | dherr: | |
1592 | BN_free(p); | |
1593 | BN_free(g); | |
1594 | BN_free(bnpub_key); | |
1595 | DH_free(dh); | |
1596 | EVP_PKEY_free(peer_tmp); | |
1597 | goto f_err; | |
1598 | dhend: | |
1599 | /* | |
1600 | * FIXME: This makes assumptions about which ciphersuites come with | |
1601 | * public keys. We should have a less ad-hoc way of doing this | |
1602 | */ | |
8df53b7a | 1603 | if (alg_a & (SSL_aRSA|SSL_aDSS)) |
8382fd3a | 1604 | pkey = X509_get0_pubkey(s->session->peer); |
0f113f3e | 1605 | /* else anonymous DH, so no certificate or pkey. */ |
0f113f3e MC |
1606 | } |
1607 | #endif /* !OPENSSL_NO_DH */ | |
ea262260 | 1608 | |
10bf4fc2 | 1609 | #ifndef OPENSSL_NO_EC |
7689082b | 1610 | else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
32942870 | 1611 | PACKET encoded_pt; |
b6981744 | 1612 | const unsigned char *ecparams; |
61dd9f7a | 1613 | int curve_nid; |
0f113f3e | 1614 | |
0f113f3e MC |
1615 | /* |
1616 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
32942870 | 1617 | * public key. For now we only support named (not generic) curves and |
8098fc56 | 1618 | * ECParameters in this case is just three bytes. |
0f113f3e | 1619 | */ |
73999b62 | 1620 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { |
f0659bdb | 1621 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
0f113f3e MC |
1622 | goto f_err; |
1623 | } | |
1624 | /* | |
1625 | * Check curve is one of our preferences, if not server has sent an | |
1626 | * invalid curve. ECParameters is 3 bytes. | |
1627 | */ | |
32942870 | 1628 | if (!tls1_check_curve(s, ecparams, 3)) { |
f0659bdb | 1629 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_CURVE); |
0f113f3e MC |
1630 | goto f_err; |
1631 | } | |
1632 | ||
61dd9f7a DSH |
1633 | curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2)); |
1634 | if (curve_nid == 0) { | |
0f113f3e | 1635 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1636 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
0f113f3e MC |
1637 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
1638 | goto f_err; | |
1639 | } | |
1640 | ||
61dd9f7a DSH |
1641 | /* Set up EVP_PKEY with named curve as parameters */ |
1642 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
1643 | if (pctx == NULL | |
1644 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
1645 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0 | |
1646 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
1647 | al = SSL_AD_INTERNAL_ERROR; | |
1648 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
1649 | goto f_err; | |
0f113f3e | 1650 | } |
61dd9f7a DSH |
1651 | EVP_PKEY_CTX_free(pctx); |
1652 | pctx = NULL; | |
0f113f3e | 1653 | |
73999b62 | 1654 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { |
f0659bdb | 1655 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
8098fc56 MC |
1656 | goto f_err; |
1657 | } | |
0f113f3e | 1658 | |
61dd9f7a DSH |
1659 | if (EC_KEY_oct2key(EVP_PKEY_get0_EC_KEY(s->s3->peer_tmp), |
1660 | PACKET_data(&encoded_pt), | |
cae41364 | 1661 | PACKET_remaining(&encoded_pt), NULL) == 0) { |
f0659bdb | 1662 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_ECPOINT); |
0f113f3e MC |
1663 | goto f_err; |
1664 | } | |
0f113f3e MC |
1665 | |
1666 | /* | |
1667 | * The ECC/TLS specification does not mention the use of DSA to sign | |
1668 | * ECParameters in the server key exchange message. We do support RSA | |
1669 | * and ECDSA. | |
1670 | */ | |
1671 | if (0) ; | |
1672 | # ifndef OPENSSL_NO_RSA | |
1673 | else if (alg_a & SSL_aRSA) | |
8382fd3a | 1674 | pkey = X509_get0_pubkey(s->session->peer); |
0f113f3e | 1675 | # endif |
10bf4fc2 | 1676 | # ifndef OPENSSL_NO_EC |
0f113f3e | 1677 | else if (alg_a & SSL_aECDSA) |
8382fd3a | 1678 | pkey = X509_get0_pubkey(s->session->peer); |
0f113f3e MC |
1679 | # endif |
1680 | /* else anonymous ECDH, so no certificate or pkey. */ | |
0f113f3e MC |
1681 | } else if (alg_k) { |
1682 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 1683 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
0f113f3e MC |
1684 | goto f_err; |
1685 | } | |
10bf4fc2 | 1686 | #endif /* !OPENSSL_NO_EC */ |
0f113f3e | 1687 | |
0f113f3e MC |
1688 | /* if it was signed, check the signature */ |
1689 | if (pkey != NULL) { | |
32942870 EK |
1690 | PACKET params; |
1691 | /* | |
1692 | * |pkt| now points to the beginning of the signature, so the difference | |
1693 | * equals the length of the parameters. | |
1694 | */ | |
1695 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
1696 | PACKET_remaining(&save_param_start) - | |
73999b62 | 1697 | PACKET_remaining(pkt))) { |
32942870 | 1698 | al = SSL_AD_INTERNAL_ERROR; |
f0659bdb | 1699 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
32942870 EK |
1700 | goto f_err; |
1701 | } | |
1702 | ||
0f113f3e | 1703 | if (SSL_USE_SIGALGS(s)) { |
b6981744 | 1704 | const unsigned char *sigalgs; |
0f113f3e | 1705 | int rv; |
73999b62 | 1706 | if (!PACKET_get_bytes(pkt, &sigalgs, 2)) { |
f0659bdb | 1707 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
0f113f3e MC |
1708 | goto f_err; |
1709 | } | |
32942870 | 1710 | rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey); |
0f113f3e MC |
1711 | if (rv == -1) |
1712 | goto err; | |
1713 | else if (rv == 0) { | |
1714 | goto f_err; | |
1715 | } | |
a2f9200f | 1716 | #ifdef SSL_DEBUG |
0f113f3e MC |
1717 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
1718 | #endif | |
3aeb9348 | 1719 | } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) { |
192e4bbb | 1720 | md = EVP_md5_sha1(); |
32942870 | 1721 | } else { |
0f113f3e | 1722 | md = EVP_sha1(); |
32942870 | 1723 | } |
0f113f3e | 1724 | |
73999b62 MC |
1725 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
1726 | || PACKET_remaining(pkt) != 0) { | |
f0659bdb | 1727 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1728 | goto f_err; |
1729 | } | |
0f113f3e | 1730 | j = EVP_PKEY_size(pkey); |
8098fc56 | 1731 | if (j < 0) { |
b9908bf9 | 1732 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
8098fc56 MC |
1733 | goto f_err; |
1734 | } | |
0f113f3e MC |
1735 | |
1736 | /* | |
8098fc56 | 1737 | * Check signature length |
0f113f3e | 1738 | */ |
32942870 | 1739 | if (PACKET_remaining(&signature) > (size_t)j) { |
0f113f3e | 1740 | /* wrong packet length */ |
b9908bf9 | 1741 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH); |
0f113f3e MC |
1742 | goto f_err; |
1743 | } | |
6e59a892 RL |
1744 | if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0 |
1745 | || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]), | |
192e4bbb | 1746 | SSL3_RANDOM_SIZE) <= 0 |
6e59a892 | 1747 | || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]), |
192e4bbb | 1748 | SSL3_RANDOM_SIZE) <= 0 |
6e59a892 | 1749 | || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms), |
192e4bbb DSH |
1750 | PACKET_remaining(¶ms)) <= 0) { |
1751 | al = SSL_AD_INTERNAL_ERROR; | |
1752 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
1753 | goto f_err; | |
1754 | } | |
6e59a892 | 1755 | if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature), |
192e4bbb DSH |
1756 | PACKET_remaining(&signature), pkey) <= 0) { |
1757 | /* bad signature */ | |
1758 | al = SSL_AD_DECRYPT_ERROR; | |
1759 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
1760 | goto f_err; | |
0f113f3e MC |
1761 | } |
1762 | } else { | |
7689082b DSH |
1763 | /* aNULL, aSRP or PSK do not need public keys */ |
1764 | if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_PSK)) { | |
0f113f3e MC |
1765 | /* Might be wrong key type, check it */ |
1766 | if (ssl3_check_cert_and_algorithm(s)) | |
1767 | /* Otherwise this shouldn't happen */ | |
b9908bf9 | 1768 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
0f113f3e MC |
1769 | goto err; |
1770 | } | |
1771 | /* still data left over */ | |
73999b62 | 1772 | if (PACKET_remaining(pkt) != 0) { |
b9908bf9 | 1773 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
0f113f3e MC |
1774 | goto f_err; |
1775 | } | |
1776 | } | |
bfb0641f | 1777 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 1778 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1779 | f_err: |
1780 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1781 | err: | |
bc36ee62 | 1782 | #ifndef OPENSSL_NO_RSA |
d6407083 | 1783 | RSA_free(rsa); |
6b521df3 | 1784 | #endif |
10bf4fc2 | 1785 | #ifndef OPENSSL_NO_EC |
61dd9f7a | 1786 | EVP_PKEY_CTX_free(pctx); |
6b521df3 | 1787 | #endif |
bfb0641f | 1788 | EVP_MD_CTX_free(md_ctx); |
fe3a3291 | 1789 | ossl_statem_set_error(s); |
b9908bf9 | 1790 | return MSG_PROCESS_ERROR; |
0f113f3e | 1791 | } |
d02b48c6 | 1792 | |
be3583fa | 1793 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1794 | { |
1795 | int ret = MSG_PROCESS_ERROR; | |
1796 | unsigned int list_len, ctype_num, i, name_len; | |
1797 | X509_NAME *xn = NULL; | |
b6981744 EK |
1798 | const unsigned char *data; |
1799 | const unsigned char *namestart, *namebytes; | |
b9908bf9 | 1800 | STACK_OF(X509_NAME) *ca_sk = NULL; |
0f113f3e MC |
1801 | |
1802 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { | |
b9908bf9 | 1803 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1804 | goto err; |
1805 | } | |
1806 | ||
1807 | /* get the certificate types */ | |
73999b62 MC |
1808 | if (!PACKET_get_1(pkt, &ctype_num) |
1809 | || !PACKET_get_bytes(pkt, &data, ctype_num)) { | |
ac112332 | 1810 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1811 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
ac112332 MC |
1812 | goto err; |
1813 | } | |
b548a1f1 RS |
1814 | OPENSSL_free(s->cert->ctypes); |
1815 | s->cert->ctypes = NULL; | |
0f113f3e MC |
1816 | if (ctype_num > SSL3_CT_NUMBER) { |
1817 | /* If we exceed static buffer copy all to cert structure */ | |
1818 | s->cert->ctypes = OPENSSL_malloc(ctype_num); | |
1819 | if (s->cert->ctypes == NULL) { | |
b9908bf9 | 1820 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1821 | goto err; |
1822 | } | |
ac112332 | 1823 | memcpy(s->cert->ctypes, data, ctype_num); |
0f113f3e MC |
1824 | s->cert->ctype_num = (size_t)ctype_num; |
1825 | ctype_num = SSL3_CT_NUMBER; | |
1826 | } | |
1827 | for (i = 0; i < ctype_num; i++) | |
ac112332 MC |
1828 | s->s3->tmp.ctype[i] = data[i]; |
1829 | ||
0f113f3e | 1830 | if (SSL_USE_SIGALGS(s)) { |
73999b62 MC |
1831 | if (!PACKET_get_net_2(pkt, &list_len) |
1832 | || !PACKET_get_bytes(pkt, &data, list_len)) { | |
0f113f3e | 1833 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
1834 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
1835 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
1836 | goto err; |
1837 | } | |
ac112332 | 1838 | |
0f113f3e MC |
1839 | /* Clear certificate digests and validity flags */ |
1840 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
d376e57d | 1841 | s->s3->tmp.md[i] = NULL; |
6383d316 | 1842 | s->s3->tmp.valid_flags[i] = 0; |
0f113f3e | 1843 | } |
ac112332 | 1844 | if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) { |
0f113f3e | 1845 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1846 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
1847 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
1848 | goto err; | |
1849 | } | |
1850 | if (!tls1_process_sigalgs(s)) { | |
1851 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 1852 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1853 | goto err; |
1854 | } | |
a0f63828 DSH |
1855 | } else { |
1856 | ssl_set_default_md(s); | |
0f113f3e MC |
1857 | } |
1858 | ||
1859 | /* get the CA RDNs */ | |
73999b62 MC |
1860 | if (!PACKET_get_net_2(pkt, &list_len) |
1861 | || PACKET_remaining(pkt) != list_len) { | |
0f113f3e | 1862 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1863 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1864 | goto err; |
1865 | } | |
1866 | ||
73999b62 MC |
1867 | while (PACKET_remaining(pkt)) { |
1868 | if (!PACKET_get_net_2(pkt, &name_len) | |
1869 | || !PACKET_get_bytes(pkt, &namebytes, name_len)) { | |
0f113f3e | 1870 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
1871 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
1872 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
1873 | goto err; |
1874 | } | |
1875 | ||
ac112332 | 1876 | namestart = namebytes; |
0f113f3e | 1877 | |
ac112332 MC |
1878 | if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes, |
1879 | name_len)) == NULL) { | |
3c33c6f6 | 1880 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1881 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); |
3c33c6f6 | 1882 | goto err; |
0f113f3e MC |
1883 | } |
1884 | ||
ac112332 | 1885 | if (namebytes != (namestart + name_len)) { |
0f113f3e | 1886 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1887 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
1888 | SSL_R_CA_DN_LENGTH_MISMATCH); |
1889 | goto err; | |
1890 | } | |
1891 | if (!sk_X509_NAME_push(ca_sk, xn)) { | |
b9908bf9 | 1892 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1893 | goto err; |
1894 | } | |
6afef8b1 | 1895 | xn = NULL; |
0f113f3e MC |
1896 | } |
1897 | ||
0f113f3e MC |
1898 | /* we should setup a certificate to return.... */ |
1899 | s->s3->tmp.cert_req = 1; | |
1900 | s->s3->tmp.ctype_num = ctype_num; | |
222561fe | 1901 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
0f113f3e MC |
1902 | s->s3->tmp.ca_names = ca_sk; |
1903 | ca_sk = NULL; | |
1904 | ||
b9908bf9 | 1905 | ret = MSG_PROCESS_CONTINUE_READING; |
cc273a93 | 1906 | goto done; |
0f113f3e | 1907 | err: |
fe3a3291 | 1908 | ossl_statem_set_error(s); |
cc273a93 | 1909 | done: |
6afef8b1 | 1910 | X509_NAME_free(xn); |
222561fe | 1911 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
b9908bf9 | 1912 | return ret; |
0f113f3e MC |
1913 | } |
1914 | ||
1915 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
dfeab068 | 1916 | { |
0f113f3e | 1917 | return (X509_NAME_cmp(*a, *b)); |
dfeab068 | 1918 | } |
dfeab068 | 1919 | |
be3583fa | 1920 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1921 | { |
1922 | int al; | |
1923 | unsigned int ticklen; | |
1924 | unsigned long ticket_lifetime_hint; | |
b9908bf9 | 1925 | |
73999b62 MC |
1926 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
1927 | || !PACKET_get_net_2(pkt, &ticklen) | |
1928 | || PACKET_remaining(pkt) != ticklen) { | |
e711da71 | 1929 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 1930 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
e711da71 EK |
1931 | goto f_err; |
1932 | } | |
1933 | ||
1934 | /* Server is allowed to change its mind and send an empty ticket. */ | |
1935 | if (ticklen == 0) | |
c9de4a20 | 1936 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 1937 | |
98ece4ee MC |
1938 | if (s->session->session_id_length > 0) { |
1939 | int i = s->session_ctx->session_cache_mode; | |
1940 | SSL_SESSION *new_sess; | |
1941 | /* | |
1942 | * We reused an existing session, so we need to replace it with a new | |
1943 | * one | |
1944 | */ | |
1945 | if (i & SSL_SESS_CACHE_CLIENT) { | |
1946 | /* | |
1947 | * Remove the old session from the cache | |
1948 | */ | |
1949 | if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) { | |
1950 | if (s->session_ctx->remove_session_cb != NULL) | |
1951 | s->session_ctx->remove_session_cb(s->session_ctx, | |
1952 | s->session); | |
1953 | } else { | |
1954 | /* We carry on if this fails */ | |
1955 | SSL_CTX_remove_session(s->session_ctx, s->session); | |
1956 | } | |
1957 | } | |
1958 | ||
1959 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
1960 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 1961 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
1962 | goto f_err; |
1963 | } | |
1964 | ||
1965 | SSL_SESSION_free(s->session); | |
1966 | s->session = new_sess; | |
1967 | } | |
1968 | ||
b548a1f1 RS |
1969 | OPENSSL_free(s->session->tlsext_tick); |
1970 | s->session->tlsext_ticklen = 0; | |
e711da71 | 1971 | |
0f113f3e | 1972 | s->session->tlsext_tick = OPENSSL_malloc(ticklen); |
a71edf3b | 1973 | if (s->session->tlsext_tick == NULL) { |
b9908bf9 | 1974 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1975 | goto err; |
1976 | } | |
73999b62 | 1977 | if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) { |
561e12bb | 1978 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1979 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
1980 | goto f_err; |
1981 | } | |
e711da71 EK |
1982 | |
1983 | s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint; | |
0f113f3e MC |
1984 | s->session->tlsext_ticklen = ticklen; |
1985 | /* | |
1986 | * There are two ways to detect a resumed ticket session. One is to set | |
1987 | * an appropriate session ID and then the server must return a match in | |
1988 | * ServerHello. This allows the normal client session ID matching to work | |
1989 | * and we know much earlier that the ticket has been accepted. The | |
1990 | * other way is to set zero length session ID when the ticket is | |
1991 | * presented and rely on the handshake to determine session resumption. | |
1992 | * We choose the former approach because this fits in with assumptions | |
1993 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
1994 | * SHA256 is disabled) hash of the ticket. | |
1995 | */ | |
561e12bb | 1996 | EVP_Digest(s->session->tlsext_tick, ticklen, |
0f113f3e | 1997 | s->session->session_id, &s->session->session_id_length, |
0f113f3e | 1998 | EVP_sha256(), NULL); |
b9908bf9 | 1999 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2000 | f_err: |
2001 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2002 | err: | |
fe3a3291 | 2003 | ossl_statem_set_error(s); |
b9908bf9 | 2004 | return MSG_PROCESS_ERROR; |
0f113f3e | 2005 | } |
67c8e7f4 | 2006 | |
be3583fa | 2007 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) |
b9908bf9 MC |
2008 | { |
2009 | int al; | |
2010 | unsigned long resplen; | |
2011 | unsigned int type; | |
b9908bf9 | 2012 | |
73999b62 | 2013 | if (!PACKET_get_1(pkt, &type) |
ac63710a | 2014 | || type != TLSEXT_STATUSTYPE_ocsp) { |
0f113f3e | 2015 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2016 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE); |
0f113f3e MC |
2017 | goto f_err; |
2018 | } | |
73999b62 MC |
2019 | if (!PACKET_get_net_3(pkt, &resplen) |
2020 | || PACKET_remaining(pkt) != resplen) { | |
0f113f3e | 2021 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2022 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
2023 | goto f_err; |
2024 | } | |
ac63710a | 2025 | s->tlsext_ocsp_resp = OPENSSL_malloc(resplen); |
a71edf3b | 2026 | if (s->tlsext_ocsp_resp == NULL) { |
0f113f3e | 2027 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 2028 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
2029 | goto f_err; |
2030 | } | |
73999b62 | 2031 | if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) { |
ac63710a | 2032 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 2033 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); |
ac63710a MC |
2034 | goto f_err; |
2035 | } | |
0f113f3e | 2036 | s->tlsext_ocsp_resplen = resplen; |
b9908bf9 | 2037 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2038 | f_err: |
2039 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2040 | ossl_statem_set_error(s); |
b9908bf9 | 2041 | return MSG_PROCESS_ERROR; |
0f113f3e | 2042 | } |
d02b48c6 | 2043 | |
be3583fa | 2044 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) |
b9908bf9 | 2045 | { |
73999b62 | 2046 | if (PACKET_remaining(pkt) > 0) { |
0f113f3e MC |
2047 | /* should contain no data */ |
2048 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
b9908bf9 | 2049 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); |
fe3a3291 | 2050 | ossl_statem_set_error(s); |
b9908bf9 | 2051 | return MSG_PROCESS_ERROR; |
0f113f3e | 2052 | } |
b9908bf9 MC |
2053 | |
2054 | #ifndef OPENSSL_NO_SRP | |
2055 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2056 | if (SRP_Calc_A_param(s) <= 0) { | |
2057 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2058 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 2059 | ossl_statem_set_error(s); |
b9908bf9 MC |
2060 | return MSG_PROCESS_ERROR; |
2061 | } | |
2062 | } | |
2063 | #endif | |
2064 | ||
a455d0f6 MC |
2065 | /* |
2066 | * at this point we check that we have the required stuff from | |
2067 | * the server | |
2068 | */ | |
2069 | if (!ssl3_check_cert_and_algorithm(s)) { | |
2070 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
fe3a3291 | 2071 | ossl_statem_set_error(s); |
a455d0f6 MC |
2072 | return MSG_PROCESS_ERROR; |
2073 | } | |
2074 | ||
bb1aaab4 MC |
2075 | /* |
2076 | * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and | |
2077 | * |tlsext_ocsp_resplen| values will be set if we actually received a status | |
2078 | * message, or NULL and -1 otherwise | |
2079 | */ | |
b1931d43 | 2080 | if (s->tlsext_status_type != -1 && s->ctx->tlsext_status_cb != NULL) { |
bb1aaab4 MC |
2081 | int ret; |
2082 | ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); | |
2083 | if (ret == 0) { | |
2084 | ssl3_send_alert(s, SSL3_AL_FATAL, | |
2085 | SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE); | |
2086 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, | |
2087 | SSL_R_INVALID_STATUS_RESPONSE); | |
2088 | return MSG_PROCESS_ERROR; | |
2089 | } | |
2090 | if (ret < 0) { | |
2091 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2092 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, ERR_R_MALLOC_FAILURE); | |
2093 | return MSG_PROCESS_ERROR; | |
2094 | } | |
2095 | } | |
2096 | ||
ed29e82a RP |
2097 | #ifndef OPENSSL_NO_CT |
2098 | if (s->ct_validation_callback != NULL) { | |
43341433 VD |
2099 | /* Note we validate the SCTs whether or not we abort on error */ |
2100 | if (!ssl_validate_ct(s) && (s->verify_mode & SSL_VERIFY_PEER)) { | |
ed29e82a RP |
2101 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
2102 | return MSG_PROCESS_ERROR; | |
2103 | } | |
2104 | } | |
2105 | #endif | |
2106 | ||
473483d4 MC |
2107 | #ifndef OPENSSL_NO_SCTP |
2108 | /* Only applies to renegotiation */ | |
2109 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s)) | |
2110 | && s->renegotiate != 0) | |
2111 | return MSG_PROCESS_CONTINUE_PROCESSING; | |
2112 | else | |
2113 | #endif | |
2114 | return MSG_PROCESS_FINISHED_READING; | |
0f113f3e | 2115 | } |
176f31dd | 2116 | |
b9908bf9 | 2117 | int tls_construct_client_key_exchange(SSL *s) |
0f113f3e MC |
2118 | { |
2119 | unsigned char *p; | |
2120 | int n; | |
7689082b DSH |
2121 | #ifndef OPENSSL_NO_PSK |
2122 | size_t pskhdrlen = 0; | |
2123 | #endif | |
0f113f3e | 2124 | unsigned long alg_k; |
bc36ee62 | 2125 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
2126 | unsigned char *q; |
2127 | EVP_PKEY *pkey = NULL; | |
923ffa97 | 2128 | EVP_PKEY_CTX *pctx = NULL; |
79df9d62 | 2129 | #endif |
fb79abe3 | 2130 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a | 2131 | EVP_PKEY *ckey = NULL, *skey = NULL; |
fb79abe3 DSH |
2132 | #endif |
2133 | #ifndef OPENSSL_NO_EC | |
0f113f3e MC |
2134 | unsigned char *encodedPoint = NULL; |
2135 | int encoded_pt_len = 0; | |
ea262260 | 2136 | #endif |
c660ec63 DSH |
2137 | unsigned char *pms = NULL; |
2138 | size_t pmslen = 0; | |
7689082b | 2139 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
d02b48c6 | 2140 | |
b9908bf9 | 2141 | p = ssl_handshake_start(s); |
d02b48c6 | 2142 | |
7689082b DSH |
2143 | |
2144 | #ifndef OPENSSL_NO_PSK | |
b9908bf9 MC |
2145 | if (alg_k & SSL_PSK) { |
2146 | int psk_err = 1; | |
2147 | /* | |
2148 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2149 | * \0-terminated identity. The last byte is for us for simulating | |
2150 | * strnlen. | |
2151 | */ | |
2152 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2153 | size_t identitylen; | |
2154 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2155 | size_t psklen; | |
2156 | ||
2157 | if (s->psk_client_callback == NULL) { | |
2158 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2159 | SSL_R_PSK_NO_CLIENT_CB); | |
2160 | goto err; | |
2161 | } | |
7689082b | 2162 | |
b9908bf9 | 2163 | memset(identity, 0, sizeof(identity)); |
7689082b | 2164 | |
b9908bf9 MC |
2165 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2166 | identity, sizeof(identity) - 1, | |
2167 | psk, sizeof(psk)); | |
7689082b | 2168 | |
b9908bf9 MC |
2169 | if (psklen > PSK_MAX_PSK_LEN) { |
2170 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2171 | ERR_R_INTERNAL_ERROR); | |
2172 | goto psk_err; | |
2173 | } else if (psklen == 0) { | |
2174 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2175 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
2176 | goto psk_err; | |
2177 | } | |
b9908bf9 | 2178 | OPENSSL_free(s->s3->tmp.psk); |
7644a9ae | 2179 | s->s3->tmp.psk = OPENSSL_memdup(psk, psklen); |
b9908bf9 | 2180 | OPENSSL_cleanse(psk, psklen); |
7689082b | 2181 | |
b9908bf9 MC |
2182 | if (s->s3->tmp.psk == NULL) { |
2183 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2184 | goto memerr; | |
2185 | } | |
7689082b | 2186 | |
b9908bf9 | 2187 | s->s3->tmp.psklen = psklen; |
b9908bf9 MC |
2188 | identitylen = strlen(identity); |
2189 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
2190 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2191 | ERR_R_INTERNAL_ERROR); | |
2192 | goto psk_err; | |
2193 | } | |
2194 | OPENSSL_free(s->session->psk_identity); | |
7644a9ae | 2195 | s->session->psk_identity = OPENSSL_strdup(identity); |
b9908bf9 | 2196 | if (s->session->psk_identity == NULL) { |
7689082b | 2197 | OPENSSL_cleanse(identity, sizeof(identity)); |
b9908bf9 | 2198 | goto memerr; |
7689082b | 2199 | } |
d02b48c6 | 2200 | |
b9908bf9 MC |
2201 | s2n(identitylen, p); |
2202 | memcpy(p, identity, identitylen); | |
2203 | pskhdrlen = 2 + identitylen; | |
2204 | p += identitylen; | |
2205 | psk_err = 0; | |
2206 | psk_err: | |
2207 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2208 | if (psk_err != 0) { | |
2209 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2210 | goto err; | |
0f113f3e | 2211 | } |
b9908bf9 MC |
2212 | } |
2213 | if (alg_k & SSL_kPSK) { | |
2214 | n = 0; | |
2215 | } else | |
2216 | #endif | |
2217 | ||
2218 | /* Fool emacs indentation */ | |
2219 | if (0) { | |
2220 | } | |
bc36ee62 | 2221 | #ifndef OPENSSL_NO_RSA |
b9908bf9 | 2222 | else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
923ffa97 | 2223 | size_t enclen; |
b9908bf9 MC |
2224 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2225 | pms = OPENSSL_malloc(pmslen); | |
a71edf3b | 2226 | if (pms == NULL) |
b9908bf9 MC |
2227 | goto memerr; |
2228 | ||
2229 | if (s->session->peer == NULL) { | |
2230 | /* | |
2231 | * We should always have a server certificate with SSL_kRSA. | |
2232 | */ | |
2233 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2234 | ERR_R_INTERNAL_ERROR); | |
2235 | goto err; | |
2236 | } | |
0f113f3e | 2237 | |
8382fd3a | 2238 | pkey = X509_get0_pubkey(s->session->peer); |
3aeb9348 | 2239 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { |
361a1191 KR |
2240 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, |
2241 | ERR_R_INTERNAL_ERROR); | |
361a1191 | 2242 | goto err; |
b9908bf9 | 2243 | } |
0f113f3e | 2244 | |
b9908bf9 MC |
2245 | pms[0] = s->client_version >> 8; |
2246 | pms[1] = s->client_version & 0xff; | |
2247 | if (RAND_bytes(pms + 2, pmslen - 2) <= 0) | |
2248 | goto err; | |
0f113f3e | 2249 | |
b9908bf9 MC |
2250 | q = p; |
2251 | /* Fix buf for TLS and beyond */ | |
2252 | if (s->version > SSL3_VERSION) | |
2253 | p += 2; | |
923ffa97 | 2254 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
923ffa97 DSH |
2255 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 |
2256 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
2257 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2258 | ERR_R_EVP_LIB); | |
2259 | goto err; | |
2260 | } | |
2261 | if (EVP_PKEY_encrypt(pctx, p, &enclen, pms, pmslen) <= 0) { | |
2262 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2263 | SSL_R_BAD_RSA_ENCRYPT); | |
2264 | goto err; | |
2265 | } | |
2266 | n = enclen; | |
2267 | EVP_PKEY_CTX_free(pctx); | |
2268 | pctx = NULL; | |
0f113f3e | 2269 | # ifdef PKCS1_CHECK |
b9908bf9 MC |
2270 | if (s->options & SSL_OP_PKCS1_CHECK_1) |
2271 | p[1]++; | |
2272 | if (s->options & SSL_OP_PKCS1_CHECK_2) | |
2273 | tmp_buf[0] = 0x70; | |
0f113f3e | 2274 | # endif |
0f113f3e | 2275 | |
b9908bf9 MC |
2276 | /* Fix buf for TLS and beyond */ |
2277 | if (s->version > SSL3_VERSION) { | |
2278 | s2n(n, q); | |
2279 | n += 2; | |
0f113f3e | 2280 | } |
b9908bf9 | 2281 | } |
f9b3bff6 | 2282 | #endif |
bc36ee62 | 2283 | #ifndef OPENSSL_NO_DH |
bc71f910 | 2284 | else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
fb79abe3 | 2285 | DH *dh_clnt = NULL; |
0aeddcfa | 2286 | BIGNUM *pub_key; |
fb79abe3 DSH |
2287 | skey = s->s3->peer_tmp; |
2288 | if (skey == NULL) { | |
bc71f910 DSH |
2289 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, |
2290 | ERR_R_INTERNAL_ERROR); | |
2291 | goto err; | |
0f113f3e | 2292 | } |
fb79abe3 DSH |
2293 | ckey = ssl_generate_pkey(skey, NID_undef); |
2294 | dh_clnt = EVP_PKEY_get0_DH(ckey); | |
0f113f3e | 2295 | |
fb79abe3 DSH |
2296 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey) == 0) { |
2297 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2298 | ERR_R_INTERNAL_ERROR); | |
b9908bf9 MC |
2299 | goto err; |
2300 | } | |
fb79abe3 | 2301 | |
0f113f3e | 2302 | |
bc71f910 | 2303 | /* send off the data */ |
0aeddcfa MC |
2304 | DH_get0_key(dh_clnt, &pub_key, NULL); |
2305 | n = BN_num_bytes(pub_key); | |
bc71f910 | 2306 | s2n(n, p); |
0aeddcfa | 2307 | BN_bn2bin(pub_key, p); |
bc71f910 | 2308 | n += 2; |
fb79abe3 DSH |
2309 | EVP_PKEY_free(ckey); |
2310 | ckey = NULL; | |
b9908bf9 MC |
2311 | } |
2312 | #endif | |
0f113f3e | 2313 | |
b9908bf9 | 2314 | #ifndef OPENSSL_NO_EC |
ce0c1f2b | 2315 | else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
0f113f3e | 2316 | |
ce0c1f2b DSH |
2317 | skey = s->s3->peer_tmp; |
2318 | if ((skey == NULL) || EVP_PKEY_get0_EC_KEY(skey) == NULL) { | |
2319 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
266483d2 | 2320 | ERR_R_INTERNAL_ERROR); |
ce0c1f2b | 2321 | goto err; |
0f113f3e | 2322 | } |
b9908bf9 | 2323 | |
61dd9f7a | 2324 | ckey = ssl_generate_pkey(skey, NID_undef); |
b9908bf9 | 2325 | |
61dd9f7a DSH |
2326 | if (ssl_derive(s, ckey, skey) == 0) { |
2327 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
b9908bf9 MC |
2328 | goto err; |
2329 | } | |
2330 | ||
61dd9f7a DSH |
2331 | /* Generate encoding of client key */ |
2332 | encoded_pt_len = EC_KEY_key2buf(EVP_PKEY_get0_EC_KEY(ckey), | |
2333 | POINT_CONVERSION_UNCOMPRESSED, | |
2334 | &encodedPoint, NULL); | |
cae41364 | 2335 | |
c66ce5eb DSH |
2336 | if (encoded_pt_len == 0) { |
2337 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); | |
2338 | goto err; | |
2339 | } | |
b9908bf9 | 2340 | |
61dd9f7a DSH |
2341 | EVP_PKEY_free(ckey); |
2342 | ckey = NULL; | |
2343 | ||
c66ce5eb | 2344 | n = encoded_pt_len; |
b9908bf9 | 2345 | |
c66ce5eb DSH |
2346 | *p = n; /* length of encoded point */ |
2347 | /* Encoded point will be copied here */ | |
2348 | p += 1; | |
2349 | /* copy the point */ | |
2350 | memcpy(p, encodedPoint, n); | |
2351 | /* increment n to account for length field */ | |
2352 | n += 1; | |
0f113f3e | 2353 | |
b9908bf9 | 2354 | /* Free allocated memory */ |
b9908bf9 | 2355 | OPENSSL_free(encodedPoint); |
b9908bf9 MC |
2356 | } |
2357 | #endif /* !OPENSSL_NO_EC */ | |
2a9b9654 | 2358 | #ifndef OPENSSL_NO_GOST |
b9908bf9 MC |
2359 | else if (alg_k & SSL_kGOST) { |
2360 | /* GOST key exchange message creation */ | |
2361 | EVP_PKEY_CTX *pkey_ctx; | |
2362 | X509 *peer_cert; | |
2363 | size_t msglen; | |
2364 | unsigned int md_len; | |
2365 | unsigned char shared_ukm[32], tmp[256]; | |
2366 | EVP_MD_CTX *ukm_hash; | |
e44380a9 DB |
2367 | int dgst_nid = NID_id_GostR3411_94; |
2368 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
2369 | dgst_nid = NID_id_GostR3411_2012_256; | |
2370 | ||
b9908bf9 MC |
2371 | |
2372 | pmslen = 32; | |
2373 | pms = OPENSSL_malloc(pmslen); | |
a71edf3b | 2374 | if (pms == NULL) |
b9908bf9 | 2375 | goto memerr; |
7689082b | 2376 | |
b9908bf9 MC |
2377 | /* |
2378 | * Get server sertificate PKEY and create ctx from it | |
2379 | */ | |
2380 | peer_cert = s->session->peer; | |
2381 | if (!peer_cert) { | |
2382 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2383 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); | |
77d514c5 MC |
2384 | goto err; |
2385 | } | |
2386 | ||
8382fd3a | 2387 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); |
a71edf3b MC |
2388 | if (pkey_ctx == NULL) { |
2389 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2390 | ERR_R_MALLOC_FAILURE); | |
2391 | goto err; | |
2392 | } | |
b9908bf9 MC |
2393 | /* |
2394 | * If we have send a certificate, and certificate key | |
5f3d93e4 | 2395 | * parameters match those of server certificate, use |
b9908bf9 MC |
2396 | * certificate key for key exchange |
2397 | */ | |
0f113f3e | 2398 | |
b9908bf9 MC |
2399 | /* Otherwise, generate ephemeral key pair */ |
2400 | ||
5f3d93e4 MC |
2401 | if (pkey_ctx == NULL |
2402 | || EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
2403 | /* Generate session key */ | |
2404 | || RAND_bytes(pms, pmslen) <= 0) { | |
b9908bf9 MC |
2405 | EVP_PKEY_CTX_free(pkey_ctx); |
2406 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2407 | ERR_R_INTERNAL_ERROR); | |
2408 | goto err; | |
2409 | }; | |
c660ec63 | 2410 | /* |
b9908bf9 | 2411 | * If we have client certificate, use its secret as peer key |
c660ec63 | 2412 | */ |
b9908bf9 MC |
2413 | if (s->s3->tmp.cert_req && s->cert->key->privatekey) { |
2414 | if (EVP_PKEY_derive_set_peer | |
2415 | (pkey_ctx, s->cert->key->privatekey) <= 0) { | |
2416 | /* | |
2417 | * If there was an error - just ignore it. Ephemeral key | |
2418 | * * would be used | |
2419 | */ | |
2420 | ERR_clear_error(); | |
c660ec63 DSH |
2421 | } |
2422 | } | |
b9908bf9 MC |
2423 | /* |
2424 | * Compute shared IV and store it in algorithm-specific context | |
2425 | * data | |
2426 | */ | |
bfb0641f | 2427 | ukm_hash = EVP_MD_CTX_new(); |
5f3d93e4 | 2428 | if (EVP_DigestInit(ukm_hash, |
e44380a9 | 2429 | EVP_get_digestbynid(dgst_nid)) <= 0 |
5f3d93e4 MC |
2430 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, |
2431 | SSL3_RANDOM_SIZE) <= 0 | |
2432 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2433 | SSL3_RANDOM_SIZE) <= 0 | |
2434 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
bfb0641f | 2435 | EVP_MD_CTX_free(ukm_hash); |
5f3d93e4 MC |
2436 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, |
2437 | ERR_R_INTERNAL_ERROR); | |
2438 | goto err; | |
2439 | } | |
bfb0641f | 2440 | EVP_MD_CTX_free(ukm_hash); |
b9908bf9 MC |
2441 | if (EVP_PKEY_CTX_ctrl |
2442 | (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8, | |
2443 | shared_ukm) < 0) { | |
2444 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2445 | SSL_R_LIBRARY_BUG); | |
2446 | goto err; | |
c660ec63 | 2447 | } |
b9908bf9 MC |
2448 | /* Make GOST keytransport blob message */ |
2449 | /* | |
2450 | * Encapsulate it into sequence | |
2451 | */ | |
2452 | *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; | |
2453 | msglen = 255; | |
5f3d93e4 | 2454 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { |
b9908bf9 MC |
2455 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, |
2456 | SSL_R_LIBRARY_BUG); | |
c660ec63 DSH |
2457 | goto err; |
2458 | } | |
b9908bf9 MC |
2459 | if (msglen >= 0x80) { |
2460 | *(p++) = 0x81; | |
2461 | *(p++) = msglen & 0xff; | |
2462 | n = msglen + 3; | |
2463 | } else { | |
2464 | *(p++) = msglen & 0xff; | |
2465 | n = msglen + 2; | |
2466 | } | |
2467 | memcpy(p, tmp, msglen); | |
2468 | /* Check if pubkey from client certificate was used */ | |
2469 | if (EVP_PKEY_CTX_ctrl | |
2470 | (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) { | |
2471 | /* Set flag "skip certificate verify" */ | |
2472 | s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; | |
2473 | } | |
2474 | EVP_PKEY_CTX_free(pkey_ctx); | |
b9908bf9 MC |
2475 | |
2476 | } | |
2a9b9654 | 2477 | #endif |
b9908bf9 MC |
2478 | #ifndef OPENSSL_NO_SRP |
2479 | else if (alg_k & SSL_kSRP) { | |
2480 | if (s->srp_ctx.A != NULL) { | |
2481 | /* send off the data */ | |
2482 | n = BN_num_bytes(s->srp_ctx.A); | |
2483 | s2n(n, p); | |
2484 | BN_bn2bin(s->srp_ctx.A, p); | |
2485 | n += 2; | |
2486 | } else { | |
2487 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2488 | ERR_R_INTERNAL_ERROR); | |
2489 | goto err; | |
2490 | } | |
2491 | OPENSSL_free(s->session->srp_username); | |
7644a9ae | 2492 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); |
b9908bf9 MC |
2493 | if (s->session->srp_username == NULL) { |
2494 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2495 | ERR_R_MALLOC_FAILURE); | |
69f68237 MC |
2496 | goto err; |
2497 | } | |
c660ec63 | 2498 | } |
b9908bf9 MC |
2499 | #endif |
2500 | else { | |
2501 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2502 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2503 | goto err; | |
2504 | } | |
2505 | ||
2506 | #ifndef OPENSSL_NO_PSK | |
2507 | n += pskhdrlen; | |
2508 | #endif | |
2509 | ||
2510 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) { | |
2511 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2512 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2513 | goto err; | |
2514 | } | |
2515 | ||
61dd9f7a DSH |
2516 | if (pms != NULL) { |
2517 | s->s3->tmp.pms = pms; | |
2518 | s->s3->tmp.pmslen = pmslen; | |
2519 | } | |
b9908bf9 MC |
2520 | |
2521 | return 1; | |
c660ec63 DSH |
2522 | memerr: |
2523 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2524 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); |
0f113f3e | 2525 | err: |
4b45c6e5 | 2526 | OPENSSL_clear_free(pms, pmslen); |
76106e60 | 2527 | s->s3->tmp.pms = NULL; |
923ffa97 DSH |
2528 | #ifndef OPENSSL_NO_RSA |
2529 | EVP_PKEY_CTX_free(pctx); | |
2530 | #endif | |
10bf4fc2 | 2531 | #ifndef OPENSSL_NO_EC |
b548a1f1 | 2532 | OPENSSL_free(encodedPoint); |
fb79abe3 DSH |
2533 | #endif |
2534 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) | |
61dd9f7a | 2535 | EVP_PKEY_free(ckey); |
7689082b DSH |
2536 | #endif |
2537 | #ifndef OPENSSL_NO_PSK | |
2538 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
2539 | s->s3->tmp.psk = NULL; | |
0f113f3e | 2540 | #endif |
fe3a3291 | 2541 | ossl_statem_set_error(s); |
b9908bf9 MC |
2542 | return 0; |
2543 | } | |
2544 | ||
2545 | int tls_client_key_exchange_post_work(SSL *s) | |
2546 | { | |
2547 | unsigned char *pms = NULL; | |
2548 | size_t pmslen = 0; | |
2549 | ||
2550 | #ifndef OPENSSL_NO_SRP | |
2551 | /* Check for SRP */ | |
2552 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2553 | if (!srp_generate_client_master_secret(s)) { | |
2554 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
2555 | ERR_R_INTERNAL_ERROR); | |
2556 | goto err; | |
2557 | } | |
2558 | return 1; | |
2559 | } | |
2560 | #endif | |
2561 | pms = s->s3->tmp.pms; | |
2562 | pmslen = s->s3->tmp.pmslen; | |
2563 | ||
2564 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
2565 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2566 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
2567 | goto err; | |
2568 | } | |
2569 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
2570 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2571 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
2572 | goto err; | |
2573 | } | |
473483d4 MC |
2574 | |
2575 | #ifndef OPENSSL_NO_SCTP | |
2576 | if (SSL_IS_DTLS(s)) { | |
2577 | unsigned char sctpauthkey[64]; | |
2578 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
2579 | ||
2580 | /* | |
2581 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
2582 | * used. | |
2583 | */ | |
141eb8c6 MC |
2584 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
2585 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
2586 | |
2587 | if (SSL_export_keying_material(s, sctpauthkey, | |
2588 | sizeof(sctpauthkey), labelbuffer, | |
2589 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
2590 | goto err; | |
2591 | ||
2592 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
2593 | sizeof(sctpauthkey), sctpauthkey); | |
2594 | } | |
2595 | #endif | |
2596 | ||
b9908bf9 MC |
2597 | return 1; |
2598 | err: | |
2599 | OPENSSL_clear_free(pms, pmslen); | |
2600 | s->s3->tmp.pms = NULL; | |
2601 | return 0; | |
0f113f3e | 2602 | } |
d02b48c6 | 2603 | |
b9908bf9 | 2604 | int tls_construct_client_verify(SSL *s) |
0f113f3e MC |
2605 | { |
2606 | unsigned char *p; | |
0f113f3e | 2607 | EVP_PKEY *pkey; |
a0f63828 | 2608 | const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys]; |
6e59a892 | 2609 | EVP_MD_CTX *mctx; |
0f113f3e | 2610 | unsigned u = 0; |
2a9b9654 | 2611 | unsigned long n = 0; |
a0f63828 DSH |
2612 | long hdatalen = 0; |
2613 | void *hdata; | |
0f113f3e | 2614 | |
bfb0641f | 2615 | mctx = EVP_MD_CTX_new(); |
6e59a892 RL |
2616 | if (mctx == NULL) { |
2617 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE); | |
2618 | goto err; | |
2619 | } | |
0f113f3e | 2620 | |
b9908bf9 MC |
2621 | p = ssl_handshake_start(s); |
2622 | pkey = s->cert->key->privatekey; | |
a0f63828 DSH |
2623 | |
2624 | hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); | |
2625 | if (hdatalen <= 0) { | |
5f3d93e4 MC |
2626 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); |
2627 | goto err; | |
2628 | } | |
a0f63828 DSH |
2629 | if (SSL_USE_SIGALGS(s)) { |
2630 | if (!tls12_get_sigandhash(p, pkey, md)) { | |
b9908bf9 MC |
2631 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); |
2632 | goto err; | |
0f113f3e | 2633 | } |
a0f63828 | 2634 | p += 2; |
2a9b9654 | 2635 | n = 2; |
a0f63828 | 2636 | } |
855a54a9 | 2637 | #ifdef SSL_DEBUG |
a0f63828 | 2638 | fprintf(stderr, "Using client alg %s\n", EVP_MD_name(md)); |
b9908bf9 | 2639 | #endif |
6e59a892 RL |
2640 | if (!EVP_SignInit_ex(mctx, md, NULL) |
2641 | || !EVP_SignUpdate(mctx, hdata, hdatalen) | |
a0f63828 | 2642 | || (s->version == SSL3_VERSION |
6e59a892 | 2643 | && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET, |
a0f63828 DSH |
2644 | s->session->master_key_length, |
2645 | s->session->master_key)) | |
6e59a892 | 2646 | || !EVP_SignFinal(mctx, p + 2, &u, pkey)) { |
a0f63828 DSH |
2647 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB); |
2648 | goto err; | |
2649 | } | |
2a9b9654 | 2650 | #ifndef OPENSSL_NO_GOST |
3aeb9348 DSH |
2651 | { |
2652 | int pktype = EVP_PKEY_id(pkey); | |
2653 | if (pktype == NID_id_GostR3410_2001 | |
2654 | || pktype == NID_id_GostR3410_2012_256 | |
2655 | || pktype == NID_id_GostR3410_2012_512) | |
2656 | BUF_reverse(p + 2, NULL, u); | |
b9908bf9 | 2657 | } |
2a9b9654 | 2658 | #endif |
a0f63828 DSH |
2659 | |
2660 | s2n(u, p); | |
2a9b9654 | 2661 | n += u + 2; |
a0f63828 DSH |
2662 | /* Digest cached records and discard handshake buffer */ |
2663 | if (!ssl3_digest_cached_records(s, 0)) | |
2664 | goto err; | |
b9908bf9 MC |
2665 | if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) { |
2666 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); | |
2667 | goto err; | |
0f113f3e | 2668 | } |
b9908bf9 | 2669 | |
bfb0641f | 2670 | EVP_MD_CTX_free(mctx); |
b9908bf9 | 2671 | return 1; |
0f113f3e | 2672 | err: |
bfb0641f | 2673 | EVP_MD_CTX_free(mctx); |
b9908bf9 | 2674 | return 0; |
0f113f3e MC |
2675 | } |
2676 | ||
2677 | /* | |
2678 | * Check a certificate can be used for client authentication. Currently check | |
2679 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
2680 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
2681 | */ |
2682 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 2683 | { |
0f113f3e MC |
2684 | if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey) |
2685 | return 0; | |
2686 | /* If no suitable signature algorithm can't use certificate */ | |
d376e57d | 2687 | if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys]) |
0f113f3e MC |
2688 | return 0; |
2689 | /* | |
2690 | * If strict mode check suitability of chain before using it. This also | |
2691 | * adjusts suite B digest if necessary. | |
2692 | */ | |
2693 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
2694 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
2695 | return 0; | |
0f113f3e MC |
2696 | return 1; |
2697 | } | |
0d609395 | 2698 | |
be3583fa | 2699 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
2700 | { |
2701 | X509 *x509 = NULL; | |
2702 | EVP_PKEY *pkey = NULL; | |
2703 | int i; | |
2704 | ||
b9908bf9 | 2705 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
2706 | /* Let cert callback update client certificates if required */ |
2707 | if (s->cert->cert_cb) { | |
2708 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
2709 | if (i < 0) { | |
2710 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 2711 | return WORK_MORE_A; |
0f113f3e MC |
2712 | } |
2713 | if (i == 0) { | |
2714 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 2715 | ossl_statem_set_error(s); |
0f113f3e MC |
2716 | return 0; |
2717 | } | |
2718 | s->rwstate = SSL_NOTHING; | |
2719 | } | |
2720 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
2721 | return WORK_FINISHED_CONTINUE; |
2722 | ||
2723 | /* Fall through to WORK_MORE_B */ | |
2724 | wst = WORK_MORE_B; | |
0f113f3e MC |
2725 | } |
2726 | ||
2727 | /* We need to get a client cert */ | |
b9908bf9 | 2728 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
2729 | /* |
2730 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
2731 | * return(-1); We then get retied later | |
2732 | */ | |
0f113f3e MC |
2733 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
2734 | if (i < 0) { | |
2735 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 2736 | return WORK_MORE_B; |
0f113f3e MC |
2737 | } |
2738 | s->rwstate = SSL_NOTHING; | |
2739 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
2740 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
2741 | i = 0; | |
2742 | } else if (i == 1) { | |
2743 | i = 0; | |
b9908bf9 | 2744 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
2745 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
2746 | } | |
2747 | ||
222561fe | 2748 | X509_free(x509); |
25aaa98a | 2749 | EVP_PKEY_free(pkey); |
0f113f3e MC |
2750 | if (i && !ssl3_check_client_certificate(s)) |
2751 | i = 0; | |
2752 | if (i == 0) { | |
2753 | if (s->version == SSL3_VERSION) { | |
2754 | s->s3->tmp.cert_req = 0; | |
2755 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 2756 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
2757 | } else { |
2758 | s->s3->tmp.cert_req = 2; | |
124037fd | 2759 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 2760 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 2761 | ossl_statem_set_error(s); |
dab18ab5 DSH |
2762 | return 0; |
2763 | } | |
0f113f3e MC |
2764 | } |
2765 | } | |
2766 | ||
b9908bf9 | 2767 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
2768 | } |
2769 | ||
b9908bf9 MC |
2770 | /* Shouldn't ever get here */ |
2771 | return WORK_ERROR; | |
2772 | } | |
2773 | ||
2774 | int tls_construct_client_certificate(SSL *s) | |
2775 | { | |
2776 | if (!ssl3_output_cert_chain(s, | |
2777 | (s->s3->tmp.cert_req == | |
2778 | 2) ? NULL : s->cert->key)) { | |
2779 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
2780 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 2781 | ossl_statem_set_error(s); |
b9908bf9 | 2782 | return 0; |
0f113f3e | 2783 | } |
b9908bf9 MC |
2784 | |
2785 | return 1; | |
0f113f3e MC |
2786 | } |
2787 | ||
2788 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 2789 | |
36d16f8e | 2790 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 2791 | { |
60f43e9e RL |
2792 | int i; |
2793 | #ifndef OPENSSL_NO_EC | |
2794 | int idx; | |
2795 | #endif | |
0f113f3e MC |
2796 | long alg_k, alg_a; |
2797 | EVP_PKEY *pkey = NULL; | |
26c79d56 | 2798 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 2799 | |
0f113f3e MC |
2800 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2801 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 2802 | |
0f113f3e | 2803 | /* we don't have a certificate */ |
55a9a16f | 2804 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 2805 | return (1); |
d02b48c6 | 2806 | |
0f113f3e | 2807 | /* This is the passed certificate */ |
d02b48c6 | 2808 | |
10bf4fc2 | 2809 | #ifndef OPENSSL_NO_EC |
60f43e9e | 2810 | idx = s->session->peer_type; |
0f113f3e | 2811 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 2812 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
2813 | /* check failed */ |
2814 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
2815 | goto f_err; | |
2816 | } else { | |
2817 | return 1; | |
2818 | } | |
2819 | } else if (alg_a & SSL_aECDSA) { | |
2820 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
2821 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
2822 | goto f_err; | |
0f113f3e MC |
2823 | } |
2824 | #endif | |
8382fd3a | 2825 | pkey = X509_get0_pubkey(s->session->peer); |
a273c6ee | 2826 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
2827 | |
2828 | /* Check that we have a certificate if we require one */ | |
2829 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
2830 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
2831 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
2832 | goto f_err; | |
2833 | } | |
bc36ee62 | 2834 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
2835 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
2836 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
2837 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
2838 | goto f_err; | |
2839 | } | |
d02b48c6 | 2840 | #endif |
bc36ee62 | 2841 | #ifndef OPENSSL_NO_RSA |
361a1191 KR |
2842 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && |
2843 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
2844 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
2845 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
2846 | goto f_err; | |
0f113f3e | 2847 | } |
79df9d62 | 2848 | #endif |
bc36ee62 | 2849 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 2850 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
26c79d56 KR |
2851 | al = SSL_AD_INTERNAL_ERROR; |
2852 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e | 2853 | goto f_err; |
0f113f3e | 2854 | } |
d02b48c6 RE |
2855 | #endif |
2856 | ||
0f113f3e MC |
2857 | return (1); |
2858 | f_err: | |
26c79d56 | 2859 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
2860 | return (0); |
2861 | } | |
2862 | ||
e481f9b9 | 2863 | #ifndef OPENSSL_NO_NEXTPROTONEG |
b9908bf9 MC |
2864 | int tls_construct_next_proto(SSL *s) |
2865 | { | |
2866 | unsigned int len, padding_len; | |
2867 | unsigned char *d; | |
2868 | ||
2869 | len = s->next_proto_negotiated_len; | |
2870 | padding_len = 32 - ((len + 2) % 32); | |
2871 | d = (unsigned char *)s->init_buf->data; | |
2872 | d[4] = len; | |
2873 | memcpy(d + 5, s->next_proto_negotiated, len); | |
2874 | d[5 + len] = padding_len; | |
2875 | memset(d + 6 + len, 0, padding_len); | |
2876 | *(d++) = SSL3_MT_NEXT_PROTO; | |
2877 | l2n3(2 + len + padding_len, d); | |
2878 | s->init_num = 4 + 2 + len + padding_len; | |
2879 | s->init_off = 0; | |
2880 | ||
2881 | return 1; | |
2882 | } | |
6434abbf | 2883 | #endif |
368888bc DSH |
2884 | |
2885 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) | |
0f113f3e MC |
2886 | { |
2887 | int i = 0; | |
368888bc | 2888 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
2889 | if (s->ctx->client_cert_engine) { |
2890 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
2891 | SSL_get_client_CA_list(s), | |
2892 | px509, ppkey, NULL, NULL, NULL); | |
2893 | if (i != 0) | |
2894 | return i; | |
2895 | } | |
2896 | #endif | |
2897 | if (s->ctx->client_cert_cb) | |
2898 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
2899 | return i; | |
2900 | } | |
d45ba43d MC |
2901 | |
2902 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, | |
e9fa092e | 2903 | unsigned char *p) |
d45ba43d MC |
2904 | { |
2905 | int i, j = 0; | |
4a640fb6 | 2906 | const SSL_CIPHER *c; |
d45ba43d MC |
2907 | unsigned char *q; |
2908 | int empty_reneg_info_scsv = !s->renegotiate; | |
2909 | /* Set disabled masks for this session */ | |
2910 | ssl_set_client_disabled(s); | |
2911 | ||
2912 | if (sk == NULL) | |
2913 | return (0); | |
2914 | q = p; | |
d45ba43d MC |
2915 | |
2916 | for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { | |
2917 | c = sk_SSL_CIPHER_value(sk, i); | |
2918 | /* Skip disabled ciphers */ | |
2919 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) | |
2920 | continue; | |
e9fa092e | 2921 | j = s->method->put_cipher_by_char(c, p); |
d45ba43d MC |
2922 | p += j; |
2923 | } | |
2924 | /* | |
2925 | * If p == q, no ciphers; caller indicates an error. Otherwise, add | |
2926 | * applicable SCSVs. | |
2927 | */ | |
2928 | if (p != q) { | |
2929 | if (empty_reneg_info_scsv) { | |
2930 | static SSL_CIPHER scsv = { | |
2931 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
2932 | }; | |
e9fa092e | 2933 | j = s->method->put_cipher_by_char(&scsv, p); |
d45ba43d | 2934 | p += j; |
d45ba43d MC |
2935 | } |
2936 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
2937 | static SSL_CIPHER scsv = { | |
2938 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
2939 | }; | |
e9fa092e | 2940 | j = s->method->put_cipher_by_char(&scsv, p); |
d45ba43d MC |
2941 | p += j; |
2942 | } | |
2943 | } | |
2944 | ||
2945 | return (p - q); | |
2946 | } |