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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> |
3eeaab4b | 158 | #ifndef OPENSSL_NO_DH |
0f113f3e | 159 | # include <openssl/dh.h> |
3eeaab4b | 160 | #endif |
d095b68d | 161 | #include <openssl/bn.h> |
368888bc | 162 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e | 163 | # include <openssl/engine.h> |
368888bc | 164 | #endif |
f9b3bff6 | 165 | |
7ab09630 | 166 | static ossl_inline int cert_req_allowed(SSL *s); |
a455d0f6 | 167 | static int key_exchange_expected(SSL *s); |
0f113f3e | 168 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b); |
d45ba43d | 169 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
e9fa092e | 170 | unsigned char *p); |
ea262260 | 171 | |
61ae935a MC |
172 | |
173 | /* | |
174 | * Is a CertificateRequest message allowed at the moment or not? | |
175 | * | |
176 | * Return values are: | |
177 | * 1: Yes | |
178 | * 0: No | |
179 | */ | |
7ab09630 | 180 | static ossl_inline int cert_req_allowed(SSL *s) |
61ae935a MC |
181 | { |
182 | /* TLS does not like anon-DH with client cert */ | |
b7fa1f98 MC |
183 | if ((s->version > SSL3_VERSION |
184 | && (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)) | |
185 | || (s->s3->tmp.new_cipher->algorithm_auth & (SSL_aSRP | SSL_aPSK))) | |
61ae935a MC |
186 | return 0; |
187 | ||
188 | return 1; | |
189 | } | |
190 | ||
191 | /* | |
a455d0f6 | 192 | * Should we expect the ServerKeyExchange message or not? |
61ae935a MC |
193 | * |
194 | * Return values are: | |
195 | * 1: Yes | |
196 | * 0: No | |
a455d0f6 | 197 | * -1: Error |
61ae935a | 198 | */ |
a455d0f6 | 199 | static int key_exchange_expected(SSL *s) |
61ae935a MC |
200 | { |
201 | long alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
202 | ||
203 | /* | |
204 | * Can't skip server key exchange if this is an ephemeral | |
a455d0f6 | 205 | * ciphersuite or for SRP |
61ae935a | 206 | */ |
a455d0f6 MC |
207 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK |
208 | | SSL_kSRP)) { | |
209 | return 1; | |
61ae935a MC |
210 | } |
211 | ||
a455d0f6 | 212 | return 0; |
61ae935a MC |
213 | } |
214 | ||
215 | /* | |
8481f583 MC |
216 | * ossl_statem_client_read_transition() encapsulates the logic for the allowed |
217 | * handshake state transitions when the client is reading messages from the | |
218 | * server. The message type that the server has sent is provided in |mt|. The | |
219 | * current state is in |s->statem.hand_state|. | |
61ae935a MC |
220 | * |
221 | * Return values are: | |
222 | * 1: Success (transition allowed) | |
223 | * 0: Error (transition not allowed) | |
224 | */ | |
8481f583 | 225 | int ossl_statem_client_read_transition(SSL *s, int mt) |
61ae935a | 226 | { |
d6f1a6e9 | 227 | OSSL_STATEM *st = &s->statem; |
a455d0f6 | 228 | int ske_expected; |
61ae935a MC |
229 | |
230 | switch(st->hand_state) { | |
231 | case TLS_ST_CW_CLNT_HELLO: | |
232 | if (mt == SSL3_MT_SERVER_HELLO) { | |
233 | st->hand_state = TLS_ST_CR_SRVR_HELLO; | |
234 | return 1; | |
235 | } | |
236 | ||
237 | if (SSL_IS_DTLS(s)) { | |
238 | if (mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
239 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
240 | return 1; | |
241 | } | |
242 | } | |
243 | break; | |
244 | ||
245 | case TLS_ST_CR_SRVR_HELLO: | |
246 | if (s->hit) { | |
247 | if (s->tlsext_ticket_expected) { | |
248 | if (mt == SSL3_MT_NEWSESSION_TICKET) { | |
249 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
250 | return 1; | |
251 | } | |
252 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
253 | st->hand_state = TLS_ST_CR_CHANGE; | |
254 | return 1; | |
255 | } | |
256 | } else { | |
257 | if (SSL_IS_DTLS(s) && mt == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
258 | st->hand_state = DTLS_ST_CR_HELLO_VERIFY_REQUEST; | |
259 | return 1; | |
ad3819c2 MC |
260 | } else if (s->version >= TLS1_VERSION |
261 | && s->tls_session_secret_cb != NULL | |
262 | && s->session->tlsext_tick != NULL | |
263 | && mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
264 | /* | |
265 | * Normally, we can tell if the server is resuming the session | |
266 | * from the session ID. EAP-FAST (RFC 4851), however, relies on | |
267 | * the next server message after the ServerHello to determine if | |
268 | * the server is resuming. | |
269 | */ | |
270 | s->hit = 1; | |
271 | st->hand_state = TLS_ST_CR_CHANGE; | |
272 | return 1; | |
61ae935a MC |
273 | } else if (!(s->s3->tmp.new_cipher->algorithm_auth |
274 | & (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { | |
275 | if (mt == SSL3_MT_CERTIFICATE) { | |
276 | st->hand_state = TLS_ST_CR_CERT; | |
277 | return 1; | |
278 | } | |
279 | } else { | |
a455d0f6 MC |
280 | ske_expected = key_exchange_expected(s); |
281 | if (ske_expected < 0) | |
282 | return 0; | |
283 | /* SKE is optional for some PSK ciphersuites */ | |
284 | if (ske_expected | |
285 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) | |
286 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
287 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { | |
288 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
289 | return 1; | |
290 | } | |
291 | } else if (mt == SSL3_MT_CERTIFICATE_REQUEST | |
61ae935a MC |
292 | && cert_req_allowed(s)) { |
293 | st->hand_state = TLS_ST_CR_CERT_REQ; | |
294 | return 1; | |
a455d0f6 | 295 | } else if (mt == SSL3_MT_SERVER_DONE) { |
61ae935a MC |
296 | st->hand_state = TLS_ST_CR_SRVR_DONE; |
297 | return 1; | |
61ae935a MC |
298 | } |
299 | } | |
300 | } | |
301 | break; | |
302 | ||
303 | case TLS_ST_CR_CERT: | |
bb1aaab4 MC |
304 | /* |
305 | * The CertificateStatus message is optional even if | |
306 | * |tlsext_status_expected| is set | |
307 | */ | |
308 | if (s->tlsext_status_expected && mt == SSL3_MT_CERTIFICATE_STATUS) { | |
309 | st->hand_state = TLS_ST_CR_CERT_STATUS; | |
310 | return 1; | |
a455d0f6 MC |
311 | } |
312 | /* Fall through */ | |
313 | ||
314 | case TLS_ST_CR_CERT_STATUS: | |
315 | ske_expected = key_exchange_expected(s); | |
316 | if (ske_expected < 0) | |
317 | return 0; | |
318 | /* SKE is optional for some PSK ciphersuites */ | |
319 | if (ske_expected | |
320 | || ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_PSK) | |
321 | && mt == SSL3_MT_SERVER_KEY_EXCHANGE)) { | |
61ae935a MC |
322 | if (mt == SSL3_MT_SERVER_KEY_EXCHANGE) { |
323 | st->hand_state = TLS_ST_CR_KEY_EXCH; | |
324 | return 1; | |
61ae935a | 325 | } |
a455d0f6 | 326 | return 0; |
61ae935a | 327 | } |
a455d0f6 | 328 | /* Fall through */ |
61ae935a | 329 | |
a455d0f6 MC |
330 | case TLS_ST_CR_KEY_EXCH: |
331 | if (mt == SSL3_MT_CERTIFICATE_REQUEST) { | |
332 | if (cert_req_allowed(s)) { | |
61ae935a MC |
333 | st->hand_state = TLS_ST_CR_CERT_REQ; |
334 | return 1; | |
61ae935a | 335 | } |
a455d0f6 | 336 | return 0; |
61ae935a | 337 | } |
a455d0f6 | 338 | /* Fall through */ |
61ae935a MC |
339 | |
340 | case TLS_ST_CR_CERT_REQ: | |
341 | if (mt == SSL3_MT_SERVER_DONE) { | |
342 | st->hand_state = TLS_ST_CR_SRVR_DONE; | |
343 | return 1; | |
344 | } | |
345 | break; | |
346 | ||
347 | case TLS_ST_CW_FINISHED: | |
348 | if (mt == SSL3_MT_NEWSESSION_TICKET && s->tlsext_ticket_expected) { | |
349 | st->hand_state = TLS_ST_CR_SESSION_TICKET; | |
350 | return 1; | |
351 | } else if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
352 | st->hand_state = TLS_ST_CR_CHANGE; | |
353 | return 1; | |
354 | } | |
355 | break; | |
356 | ||
357 | case TLS_ST_CR_SESSION_TICKET: | |
358 | if (mt == SSL3_MT_CHANGE_CIPHER_SPEC) { | |
359 | st->hand_state = TLS_ST_CR_CHANGE; | |
360 | return 1; | |
361 | } | |
362 | break; | |
363 | ||
364 | case TLS_ST_CR_CHANGE: | |
365 | if (mt == SSL3_MT_FINISHED) { | |
366 | st->hand_state = TLS_ST_CR_FINISHED; | |
367 | return 1; | |
368 | } | |
369 | break; | |
370 | ||
371 | default: | |
372 | break; | |
373 | } | |
374 | ||
375 | /* No valid transition found */ | |
376 | return 0; | |
377 | } | |
378 | ||
379 | /* | |
380 | * client_write_transition() works out what handshake state to move to next | |
381 | * when the client is writing messages to be sent to the server. | |
382 | */ | |
8481f583 | 383 | WRITE_TRAN ossl_statem_client_write_transition(SSL *s) |
61ae935a | 384 | { |
d6f1a6e9 | 385 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
386 | |
387 | switch(st->hand_state) { | |
388 | case TLS_ST_OK: | |
389 | /* Renegotiation - fall through */ | |
390 | case TLS_ST_BEFORE: | |
391 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
392 | return WRITE_TRAN_CONTINUE; | |
393 | ||
394 | case TLS_ST_CW_CLNT_HELLO: | |
395 | /* | |
396 | * No transition at the end of writing because we don't know what | |
397 | * we will be sent | |
398 | */ | |
399 | return WRITE_TRAN_FINISHED; | |
400 | ||
401 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: | |
402 | st->hand_state = TLS_ST_CW_CLNT_HELLO; | |
403 | return WRITE_TRAN_CONTINUE; | |
404 | ||
405 | case TLS_ST_CR_SRVR_DONE: | |
406 | if (s->s3->tmp.cert_req) | |
407 | st->hand_state = TLS_ST_CW_CERT; | |
408 | else | |
409 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
410 | return WRITE_TRAN_CONTINUE; | |
411 | ||
412 | case TLS_ST_CW_CERT: | |
413 | st->hand_state = TLS_ST_CW_KEY_EXCH; | |
414 | return WRITE_TRAN_CONTINUE; | |
415 | ||
416 | case TLS_ST_CW_KEY_EXCH: | |
417 | /* | |
418 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
419 | * sent, but no verify packet is sent | |
420 | */ | |
421 | /* | |
422 | * XXX: For now, we do not support client authentication in ECDH | |
423 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
424 | * need to skip the certificate verify message when client's | |
425 | * ECDH public key is sent inside the client certificate. | |
426 | */ | |
427 | if (s->s3->tmp.cert_req == 1) { | |
428 | st->hand_state = TLS_ST_CW_CERT_VRFY; | |
429 | } else { | |
430 | st->hand_state = TLS_ST_CW_CHANGE; | |
431 | } | |
432 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
433 | st->hand_state = TLS_ST_CW_CHANGE; | |
434 | } | |
435 | return WRITE_TRAN_CONTINUE; | |
436 | ||
437 | case TLS_ST_CW_CERT_VRFY: | |
438 | st->hand_state = TLS_ST_CW_CHANGE; | |
439 | return WRITE_TRAN_CONTINUE; | |
440 | ||
441 | case TLS_ST_CW_CHANGE: | |
442 | #if defined(OPENSSL_NO_NEXTPROTONEG) | |
443 | st->hand_state = TLS_ST_CW_FINISHED; | |
444 | #else | |
445 | if (!SSL_IS_DTLS(s) && s->s3->next_proto_neg_seen) | |
446 | st->hand_state = TLS_ST_CW_NEXT_PROTO; | |
447 | else | |
448 | st->hand_state = TLS_ST_CW_FINISHED; | |
449 | #endif | |
450 | return WRITE_TRAN_CONTINUE; | |
451 | ||
452 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
453 | case TLS_ST_CW_NEXT_PROTO: | |
454 | st->hand_state = TLS_ST_CW_FINISHED; | |
455 | return WRITE_TRAN_CONTINUE; | |
456 | #endif | |
457 | ||
458 | case TLS_ST_CW_FINISHED: | |
459 | if (s->hit) { | |
460 | st->hand_state = TLS_ST_OK; | |
fe3a3291 | 461 | ossl_statem_set_in_init(s, 0); |
61ae935a MC |
462 | return WRITE_TRAN_CONTINUE; |
463 | } else { | |
464 | return WRITE_TRAN_FINISHED; | |
465 | } | |
466 | ||
467 | case TLS_ST_CR_FINISHED: | |
468 | if (s->hit) { | |
469 | st->hand_state = TLS_ST_CW_CHANGE; | |
470 | return WRITE_TRAN_CONTINUE; | |
471 | } else { | |
472 | st->hand_state = TLS_ST_OK; | |
fe3a3291 | 473 | ossl_statem_set_in_init(s, 0); |
61ae935a MC |
474 | return WRITE_TRAN_CONTINUE; |
475 | } | |
476 | ||
477 | default: | |
478 | /* Shouldn't happen */ | |
479 | return WRITE_TRAN_ERROR; | |
480 | } | |
481 | } | |
482 | ||
483 | /* | |
484 | * Perform any pre work that needs to be done prior to sending a message from | |
485 | * the client to the server. | |
486 | */ | |
8481f583 | 487 | WORK_STATE ossl_statem_client_pre_work(SSL *s, WORK_STATE wst) |
61ae935a | 488 | { |
d6f1a6e9 | 489 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
490 | |
491 | switch(st->hand_state) { | |
492 | case TLS_ST_CW_CLNT_HELLO: | |
493 | s->shutdown = 0; | |
494 | if (SSL_IS_DTLS(s)) { | |
495 | /* every DTLS ClientHello resets Finished MAC */ | |
496 | ssl3_init_finished_mac(s); | |
497 | } | |
498 | break; | |
499 | ||
500 | case TLS_ST_CW_CERT: | |
501 | return tls_prepare_client_certificate(s, wst); | |
502 | ||
503 | case TLS_ST_CW_CHANGE: | |
504 | if (SSL_IS_DTLS(s)) { | |
505 | if (s->hit) { | |
506 | /* | |
507 | * We're into the last flight so we don't retransmit these | |
508 | * messages unless we need to. | |
509 | */ | |
510 | st->use_timer = 0; | |
511 | } | |
512 | #ifndef OPENSSL_NO_SCTP | |
513 | if (BIO_dgram_is_sctp(SSL_get_wbio(s))) | |
514 | return dtls_wait_for_dry(s); | |
515 | #endif | |
516 | } | |
517 | return WORK_FINISHED_CONTINUE; | |
518 | ||
519 | case TLS_ST_OK: | |
520 | return tls_finish_handshake(s, wst); | |
521 | ||
522 | default: | |
523 | /* No pre work to be done */ | |
524 | break; | |
525 | } | |
526 | ||
527 | return WORK_FINISHED_CONTINUE; | |
528 | } | |
529 | ||
530 | /* | |
531 | * Perform any work that needs to be done after sending a message from the | |
532 | * client to the server. | |
533 | */ | |
8481f583 | 534 | WORK_STATE ossl_statem_client_post_work(SSL *s, WORK_STATE wst) |
61ae935a | 535 | { |
d6f1a6e9 | 536 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
537 | |
538 | s->init_num = 0; | |
539 | ||
540 | switch(st->hand_state) { | |
541 | case TLS_ST_CW_CLNT_HELLO: | |
542 | if (SSL_IS_DTLS(s) && s->d1->cookie_len > 0 && statem_flush(s) != 1) | |
543 | return WORK_MORE_A; | |
544 | #ifndef OPENSSL_NO_SCTP | |
545 | /* Disable buffering for SCTP */ | |
546 | if (!SSL_IS_DTLS(s) || !BIO_dgram_is_sctp(SSL_get_wbio(s))) { | |
547 | #endif | |
548 | /* | |
549 | * turn on buffering for the next lot of output | |
550 | */ | |
551 | if (s->bbio != s->wbio) | |
552 | s->wbio = BIO_push(s->bbio, s->wbio); | |
553 | #ifndef OPENSSL_NO_SCTP | |
554 | } | |
555 | #endif | |
556 | if (SSL_IS_DTLS(s)) { | |
557 | /* Treat the next message as the first packet */ | |
558 | s->first_packet = 1; | |
559 | } | |
560 | break; | |
561 | ||
562 | case TLS_ST_CW_KEY_EXCH: | |
563 | if (tls_client_key_exchange_post_work(s) == 0) | |
564 | return WORK_ERROR; | |
565 | break; | |
566 | ||
567 | case TLS_ST_CW_CHANGE: | |
568 | s->session->cipher = s->s3->tmp.new_cipher; | |
569 | #ifdef OPENSSL_NO_COMP | |
570 | s->session->compress_meth = 0; | |
571 | #else | |
572 | if (s->s3->tmp.new_compression == NULL) | |
573 | s->session->compress_meth = 0; | |
574 | else | |
575 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
576 | #endif | |
577 | if (!s->method->ssl3_enc->setup_key_block(s)) | |
578 | return WORK_ERROR; | |
579 | ||
580 | if (!s->method->ssl3_enc->change_cipher_state(s, | |
581 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
582 | return WORK_ERROR; | |
583 | ||
584 | if (SSL_IS_DTLS(s)) { | |
585 | #ifndef OPENSSL_NO_SCTP | |
586 | if (s->hit) { | |
587 | /* | |
588 | * Change to new shared key of SCTP-Auth, will be ignored if | |
589 | * no SCTP used. | |
590 | */ | |
591 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
592 | 0, NULL); | |
593 | } | |
594 | #endif | |
595 | ||
596 | dtls1_reset_seq_numbers(s, SSL3_CC_WRITE); | |
597 | } | |
598 | break; | |
599 | ||
600 | case TLS_ST_CW_FINISHED: | |
601 | #ifndef OPENSSL_NO_SCTP | |
602 | if (wst == WORK_MORE_A && SSL_IS_DTLS(s) && s->hit == 0) { | |
603 | /* | |
604 | * Change to new shared key of SCTP-Auth, will be ignored if | |
605 | * no SCTP used. | |
606 | */ | |
607 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY, | |
608 | 0, NULL); | |
609 | } | |
610 | #endif | |
611 | if (statem_flush(s) != 1) | |
612 | return WORK_MORE_B; | |
61ae935a MC |
613 | break; |
614 | ||
615 | default: | |
616 | /* No post work to be done */ | |
617 | break; | |
618 | } | |
619 | ||
620 | return WORK_FINISHED_CONTINUE; | |
621 | } | |
622 | ||
623 | /* | |
624 | * Construct a message to be sent from the client to the server. | |
625 | * | |
626 | * Valid return values are: | |
627 | * 1: Success | |
628 | * 0: Error | |
629 | */ | |
8481f583 | 630 | int ossl_statem_client_construct_message(SSL *s) |
61ae935a | 631 | { |
d6f1a6e9 | 632 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
633 | |
634 | switch(st->hand_state) { | |
635 | case TLS_ST_CW_CLNT_HELLO: | |
636 | return tls_construct_client_hello(s); | |
637 | ||
638 | case TLS_ST_CW_CERT: | |
639 | return tls_construct_client_certificate(s); | |
640 | ||
641 | case TLS_ST_CW_KEY_EXCH: | |
642 | return tls_construct_client_key_exchange(s); | |
643 | ||
644 | case TLS_ST_CW_CERT_VRFY: | |
645 | return tls_construct_client_verify(s); | |
646 | ||
647 | case TLS_ST_CW_CHANGE: | |
648 | if (SSL_IS_DTLS(s)) | |
649 | return dtls_construct_change_cipher_spec(s); | |
650 | else | |
651 | return tls_construct_change_cipher_spec(s); | |
652 | ||
653 | #if !defined(OPENSSL_NO_NEXTPROTONEG) | |
654 | case TLS_ST_CW_NEXT_PROTO: | |
655 | return tls_construct_next_proto(s); | |
656 | #endif | |
657 | case TLS_ST_CW_FINISHED: | |
658 | return tls_construct_finished(s, | |
659 | s->method-> | |
660 | ssl3_enc->client_finished_label, | |
661 | s->method-> | |
662 | ssl3_enc->client_finished_label_len); | |
663 | ||
664 | default: | |
665 | /* Shouldn't happen */ | |
666 | break; | |
667 | } | |
668 | ||
669 | return 0; | |
670 | } | |
671 | ||
672 | /* | |
673 | * Returns the maximum allowed length for the current message that we are | |
674 | * reading. Excludes the message header. | |
675 | */ | |
8481f583 | 676 | unsigned long ossl_statem_client_max_message_size(SSL *s) |
61ae935a | 677 | { |
d6f1a6e9 | 678 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
679 | |
680 | switch(st->hand_state) { | |
681 | case TLS_ST_CR_SRVR_HELLO: | |
682 | return SERVER_HELLO_MAX_LENGTH; | |
683 | ||
684 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: | |
685 | return HELLO_VERIFY_REQUEST_MAX_LENGTH; | |
686 | ||
687 | case TLS_ST_CR_CERT: | |
688 | return s->max_cert_list; | |
689 | ||
690 | case TLS_ST_CR_CERT_STATUS: | |
691 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
692 | ||
693 | case TLS_ST_CR_KEY_EXCH: | |
694 | return SERVER_KEY_EXCH_MAX_LENGTH; | |
695 | ||
696 | case TLS_ST_CR_CERT_REQ: | |
057b6f79 MC |
697 | /* Set to s->max_cert_list for compatibility with previous releases. |
698 | * In practice these messages can get quite long if servers are | |
699 | * configured to provide a long list of acceptable CAs | |
700 | */ | |
701 | return s->max_cert_list; | |
61ae935a MC |
702 | |
703 | case TLS_ST_CR_SRVR_DONE: | |
704 | return SERVER_HELLO_DONE_MAX_LENGTH; | |
705 | ||
706 | case TLS_ST_CR_CHANGE: | |
707 | return CCS_MAX_LENGTH; | |
708 | ||
709 | case TLS_ST_CR_SESSION_TICKET: | |
710 | return SSL3_RT_MAX_PLAIN_LENGTH; | |
711 | ||
712 | case TLS_ST_CR_FINISHED: | |
713 | return FINISHED_MAX_LENGTH; | |
714 | ||
715 | default: | |
716 | /* Shouldn't happen */ | |
717 | break; | |
718 | } | |
719 | ||
720 | return 0; | |
721 | } | |
722 | ||
723 | /* | |
724 | * Process a message that the client has been received from the server. | |
725 | */ | |
8481f583 | 726 | MSG_PROCESS_RETURN ossl_statem_client_process_message(SSL *s, PACKET *pkt) |
61ae935a | 727 | { |
d6f1a6e9 | 728 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
729 | |
730 | switch(st->hand_state) { | |
731 | case TLS_ST_CR_SRVR_HELLO: | |
732 | return tls_process_server_hello(s, pkt); | |
733 | ||
734 | case DTLS_ST_CR_HELLO_VERIFY_REQUEST: | |
735 | return dtls_process_hello_verify(s, pkt); | |
736 | ||
737 | case TLS_ST_CR_CERT: | |
738 | return tls_process_server_certificate(s, pkt); | |
739 | ||
740 | case TLS_ST_CR_CERT_STATUS: | |
741 | return tls_process_cert_status(s, pkt); | |
742 | ||
743 | case TLS_ST_CR_KEY_EXCH: | |
744 | return tls_process_key_exchange(s, pkt); | |
745 | ||
746 | case TLS_ST_CR_CERT_REQ: | |
747 | return tls_process_certificate_request(s, pkt); | |
748 | ||
749 | case TLS_ST_CR_SRVR_DONE: | |
750 | return tls_process_server_done(s, pkt); | |
751 | ||
752 | case TLS_ST_CR_CHANGE: | |
753 | return tls_process_change_cipher_spec(s, pkt); | |
754 | ||
755 | case TLS_ST_CR_SESSION_TICKET: | |
756 | return tls_process_new_session_ticket(s, pkt); | |
757 | ||
758 | case TLS_ST_CR_FINISHED: | |
759 | return tls_process_finished(s, pkt); | |
760 | ||
761 | default: | |
762 | /* Shouldn't happen */ | |
763 | break; | |
764 | } | |
765 | ||
766 | return MSG_PROCESS_ERROR; | |
767 | } | |
768 | ||
769 | /* | |
770 | * Perform any further processing required following the receipt of a message | |
771 | * from the server | |
772 | */ | |
8481f583 | 773 | WORK_STATE ossl_statem_client_post_process_message(SSL *s, WORK_STATE wst) |
61ae935a | 774 | { |
d6f1a6e9 | 775 | OSSL_STATEM *st = &s->statem; |
61ae935a MC |
776 | |
777 | switch(st->hand_state) { | |
778 | #ifndef OPENSSL_NO_SCTP | |
779 | case TLS_ST_CR_SRVR_DONE: | |
780 | /* We only get here if we are using SCTP and we are renegotiating */ | |
781 | if (BIO_dgram_sctp_msg_waiting(SSL_get_rbio(s))) { | |
782 | s->s3->in_read_app_data = 2; | |
783 | s->rwstate = SSL_READING; | |
784 | BIO_clear_retry_flags(SSL_get_rbio(s)); | |
785 | BIO_set_retry_read(SSL_get_rbio(s)); | |
fe3a3291 | 786 | ossl_statem_set_sctp_read_sock(s, 1); |
61ae935a MC |
787 | return WORK_MORE_A; |
788 | } | |
fe3a3291 | 789 | ossl_statem_set_sctp_read_sock(s, 0); |
61ae935a MC |
790 | return WORK_FINISHED_STOP; |
791 | #endif | |
792 | ||
61ae935a MC |
793 | default: |
794 | break; | |
795 | } | |
796 | ||
797 | /* Shouldn't happen */ | |
798 | return WORK_ERROR; | |
799 | } | |
800 | ||
b9908bf9 | 801 | int tls_construct_client_hello(SSL *s) |
0f113f3e MC |
802 | { |
803 | unsigned char *buf; | |
804 | unsigned char *p, *d; | |
805 | int i; | |
4fa52141 | 806 | int protverr; |
0f113f3e MC |
807 | unsigned long l; |
808 | int al = 0; | |
09b6c2ef | 809 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
810 | int j; |
811 | SSL_COMP *comp; | |
812 | #endif | |
b9908bf9 | 813 | SSL_SESSION *sess = s->session; |
0f113f3e MC |
814 | |
815 | buf = (unsigned char *)s->init_buf->data; | |
0f113f3e | 816 | |
b9908bf9 | 817 | /* Work out what SSL/TLS/DTLS version to use */ |
4fa52141 VD |
818 | protverr = ssl_set_client_hello_version(s); |
819 | if (protverr != 0) { | |
820 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, protverr); | |
b9908bf9 | 821 | goto err; |
4fa52141 | 822 | } |
0f113f3e | 823 | |
b9908bf9 | 824 | if ((sess == NULL) || (sess->ssl_version != s->version) || |
0f113f3e | 825 | /* |
b9908bf9 MC |
826 | * In the case of EAP-FAST, we can have a pre-shared |
827 | * "ticket" without a session ID. | |
0f113f3e | 828 | */ |
b9908bf9 MC |
829 | (!sess->session_id_length && !sess->tlsext_tick) || |
830 | (sess->not_resumable)) { | |
831 | if (!ssl_get_new_session(s, 0)) | |
e1b568dd | 832 | goto err; |
b9908bf9 MC |
833 | } |
834 | /* else use the pre-loaded session */ | |
0f113f3e | 835 | |
b9908bf9 | 836 | p = s->s3->client_random; |
0f113f3e | 837 | |
b9908bf9 MC |
838 | /* |
839 | * for DTLS if client_random is initialized, reuse it, we are | |
840 | * required to use same upon reply to HelloVerify | |
841 | */ | |
842 | if (SSL_IS_DTLS(s)) { | |
843 | size_t idx; | |
844 | i = 1; | |
845 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
846 | if (p[idx]) { | |
847 | i = 0; | |
848 | break; | |
0f113f3e | 849 | } |
0f113f3e | 850 | } |
b9908bf9 MC |
851 | } else |
852 | i = 1; | |
0f113f3e | 853 | |
b9908bf9 MC |
854 | if (i && ssl_fill_hello_random(s, 0, p, |
855 | sizeof(s->s3->client_random)) <= 0) | |
856 | goto err; | |
857 | ||
858 | /* Do the message type and length last */ | |
859 | d = p = ssl_handshake_start(s); | |
860 | ||
861 | /*- | |
862 | * version indicates the negotiated version: for example from | |
863 | * an SSLv2/v3 compatible client hello). The client_version | |
864 | * field is the maximum version we permit and it is also | |
865 | * used in RSA encrypted premaster secrets. Some servers can | |
866 | * choke if we initially report a higher version then | |
867 | * renegotiate to a lower one in the premaster secret. This | |
868 | * didn't happen with TLS 1.0 as most servers supported it | |
869 | * but it can with TLS 1.1 or later if the server only supports | |
870 | * 1.0. | |
871 | * | |
872 | * Possible scenario with previous logic: | |
873 | * 1. Client hello indicates TLS 1.2 | |
874 | * 2. Server hello says TLS 1.0 | |
875 | * 3. RSA encrypted premaster secret uses 1.2. | |
876 | * 4. Handhaked proceeds using TLS 1.0. | |
877 | * 5. Server sends hello request to renegotiate. | |
878 | * 6. Client hello indicates TLS v1.0 as we now | |
879 | * know that is maximum server supports. | |
880 | * 7. Server chokes on RSA encrypted premaster secret | |
881 | * containing version 1.0. | |
882 | * | |
883 | * For interoperability it should be OK to always use the | |
884 | * maximum version we support in client hello and then rely | |
885 | * on the checking of version to ensure the servers isn't | |
886 | * being inconsistent: for example initially negotiating with | |
887 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
888 | * client_version in client hello and not resetting it to | |
889 | * the negotiated version. | |
890 | */ | |
891 | *(p++) = s->client_version >> 8; | |
892 | *(p++) = s->client_version & 0xff; | |
893 | ||
894 | /* Random stuff */ | |
895 | memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); | |
896 | p += SSL3_RANDOM_SIZE; | |
897 | ||
898 | /* Session ID */ | |
899 | if (s->new_session) | |
900 | i = 0; | |
901 | else | |
902 | i = s->session->session_id_length; | |
903 | *(p++) = i; | |
904 | if (i != 0) { | |
905 | if (i > (int)sizeof(s->session->session_id)) { | |
906 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
907 | goto err; | |
0f113f3e | 908 | } |
b9908bf9 MC |
909 | memcpy(p, s->session->session_id, i); |
910 | p += i; | |
911 | } | |
0f113f3e | 912 | |
b9908bf9 MC |
913 | /* cookie stuff for DTLS */ |
914 | if (SSL_IS_DTLS(s)) { | |
915 | if (s->d1->cookie_len > sizeof(s->d1->cookie)) { | |
916 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
917 | goto err; |
918 | } | |
b9908bf9 MC |
919 | *(p++) = s->d1->cookie_len; |
920 | memcpy(p, s->d1->cookie, s->d1->cookie_len); | |
921 | p += s->d1->cookie_len; | |
922 | } | |
923 | ||
924 | /* Ciphers supported */ | |
925 | i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2])); | |
926 | if (i == 0) { | |
927 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); | |
928 | goto err; | |
929 | } | |
800e1cd9 | 930 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
b9908bf9 MC |
931 | /* |
932 | * Some servers hang if client hello > 256 bytes as hack workaround | |
933 | * chop number of supported ciphers to keep it well below this if we | |
934 | * use TLS v1.2 | |
935 | */ | |
936 | if (TLS1_get_version(s) >= TLS1_2_VERSION | |
937 | && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) | |
938 | i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
0f113f3e | 939 | #endif |
b9908bf9 MC |
940 | s2n(i, p); |
941 | p += i; | |
0f113f3e | 942 | |
b9908bf9 | 943 | /* COMPRESSION */ |
09b6c2ef | 944 | #ifdef OPENSSL_NO_COMP |
b9908bf9 | 945 | *(p++) = 1; |
09b6c2ef | 946 | #else |
566dda07 | 947 | |
b9908bf9 MC |
948 | if (!ssl_allow_compression(s) || !s->ctx->comp_methods) |
949 | j = 0; | |
950 | else | |
951 | j = sk_SSL_COMP_num(s->ctx->comp_methods); | |
952 | *(p++) = 1 + j; | |
953 | for (i = 0; i < j; i++) { | |
954 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
955 | *(p++) = comp->id; | |
956 | } | |
09b6c2ef | 957 | #endif |
b9908bf9 | 958 | *(p++) = 0; /* Add the NULL method */ |
761772d7 | 959 | |
b9908bf9 MC |
960 | /* TLS extensions */ |
961 | if (ssl_prepare_clienthello_tlsext(s) <= 0) { | |
962 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); | |
963 | goto err; | |
964 | } | |
965 | if ((p = | |
966 | ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH, | |
967 | &al)) == NULL) { | |
968 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
969 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
970 | goto err; | |
971 | } | |
0f113f3e | 972 | |
b9908bf9 MC |
973 | l = p - d; |
974 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) { | |
975 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
976 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
977 | goto err; | |
0f113f3e MC |
978 | } |
979 | ||
b9908bf9 | 980 | return 1; |
0f113f3e | 981 | err: |
fe3a3291 | 982 | ossl_statem_set_error(s); |
b9908bf9 | 983 | return 0; |
0f113f3e | 984 | } |
d02b48c6 | 985 | |
be3583fa | 986 | MSG_PROCESS_RETURN dtls_process_hello_verify(SSL *s, PACKET *pkt) |
8ba708e5 MC |
987 | { |
988 | int al; | |
989 | unsigned int cookie_len; | |
990 | PACKET cookiepkt; | |
991 | ||
992 | if (!PACKET_forward(pkt, 2) | |
993 | || !PACKET_get_length_prefixed_1(pkt, &cookiepkt)) { | |
994 | al = SSL_AD_DECODE_ERROR; | |
995 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
996 | goto f_err; | |
997 | } | |
998 | ||
999 | cookie_len = PACKET_remaining(&cookiepkt); | |
1000 | if (cookie_len > sizeof(s->d1->cookie)) { | |
1001 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1002 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_TOO_LONG); | |
1003 | goto f_err; | |
1004 | } | |
1005 | ||
1006 | if (!PACKET_copy_bytes(&cookiepkt, s->d1->cookie, cookie_len)) { | |
1007 | al = SSL_AD_DECODE_ERROR; | |
1008 | SSLerr(SSL_F_DTLS_PROCESS_HELLO_VERIFY, SSL_R_LENGTH_MISMATCH); | |
1009 | goto f_err; | |
1010 | } | |
1011 | s->d1->cookie_len = cookie_len; | |
1012 | ||
1013 | return MSG_PROCESS_FINISHED_READING; | |
1014 | f_err: | |
1015 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 1016 | ossl_statem_set_error(s); |
8ba708e5 MC |
1017 | return MSG_PROCESS_ERROR; |
1018 | } | |
1019 | ||
be3583fa | 1020 | MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1021 | { |
1022 | STACK_OF(SSL_CIPHER) *sk; | |
1023 | const SSL_CIPHER *c; | |
73999b62 | 1024 | PACKET session_id; |
b9908bf9 | 1025 | size_t session_id_len; |
b6981744 | 1026 | const unsigned char *cipherchars; |
b9908bf9 MC |
1027 | int i, al = SSL_AD_INTERNAL_ERROR; |
1028 | unsigned int compression; | |
4fa52141 VD |
1029 | unsigned int sversion; |
1030 | int protverr; | |
b9908bf9 MC |
1031 | #ifndef OPENSSL_NO_COMP |
1032 | SSL_COMP *comp; | |
1033 | #endif | |
1034 | ||
4fa52141 VD |
1035 | if (!PACKET_get_net_2(pkt, &sversion)) { |
1036 | al = SSL_AD_DECODE_ERROR; | |
1037 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
1038 | goto f_err; | |
1039 | } | |
50932c4a | 1040 | |
4fa52141 VD |
1041 | protverr = ssl_choose_client_version(s, sversion); |
1042 | if (protverr != 0) { | |
1043 | al = SSL_AD_PROTOCOL_VERSION; | |
1044 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, protverr); | |
1045 | goto f_err; | |
0f113f3e | 1046 | } |
0f113f3e MC |
1047 | |
1048 | /* load the server hello data */ | |
1049 | /* load the server random */ | |
73999b62 | 1050 | if (!PACKET_copy_bytes(pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { |
50932c4a | 1051 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1052 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1053 | goto f_err; |
1054 | } | |
0f113f3e MC |
1055 | |
1056 | s->hit = 0; | |
1057 | ||
fc5ce51d | 1058 | /* Get the session-id. */ |
73999b62 | 1059 | if (!PACKET_get_length_prefixed_1(pkt, &session_id)) { |
fc5ce51d | 1060 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 1061 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1062 | goto f_err; |
1063 | } | |
1064 | session_id_len = PACKET_remaining(&session_id); | |
1065 | if (session_id_len > sizeof s->session->session_id | |
1066 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
0f113f3e | 1067 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1068 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG); |
0f113f3e MC |
1069 | goto f_err; |
1070 | } | |
e481f9b9 | 1071 | |
73999b62 | 1072 | if (!PACKET_get_bytes(pkt, &cipherchars, TLS_CIPHER_LEN)) { |
f0659bdb | 1073 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
fc5ce51d EK |
1074 | al = SSL_AD_DECODE_ERROR; |
1075 | goto f_err; | |
1076 | } | |
1077 | ||
0f113f3e | 1078 | /* |
6e3d0153 EK |
1079 | * Check if we can resume the session based on external pre-shared secret. |
1080 | * EAP-FAST (RFC 4851) supports two types of session resumption. | |
1081 | * Resumption based on server-side state works with session IDs. | |
1082 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1083 | * works by overriding the SessionTicket extension at the application | |
1084 | * layer, and does not send a session ID. (We do not know whether EAP-FAST | |
1085 | * servers would honour the session ID.) Therefore, the session ID alone | |
1086 | * is not a reliable indicator of session resumption, so we first check if | |
1087 | * we can resume, and later peek at the next handshake message to see if the | |
1088 | * server wants to resume. | |
0f113f3e | 1089 | */ |
6e3d0153 EK |
1090 | if (s->version >= TLS1_VERSION && s->tls_session_secret_cb && |
1091 | s->session->tlsext_tick) { | |
4a640fb6 | 1092 | const SSL_CIPHER *pref_cipher = NULL; |
0f113f3e MC |
1093 | s->session->master_key_length = sizeof(s->session->master_key); |
1094 | if (s->tls_session_secret_cb(s, s->session->master_key, | |
1095 | &s->session->master_key_length, | |
1096 | NULL, &pref_cipher, | |
1097 | s->tls_session_secret_cb_arg)) { | |
1098 | s->session->cipher = pref_cipher ? | |
50932c4a | 1099 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars); |
6e3d0153 | 1100 | } else { |
b9908bf9 | 1101 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); |
6e3d0153 EK |
1102 | al = SSL_AD_INTERNAL_ERROR; |
1103 | goto f_err; | |
0f113f3e | 1104 | } |
50932c4a MC |
1105 | } |
1106 | ||
fc5ce51d EK |
1107 | if (session_id_len != 0 && session_id_len == s->session->session_id_length |
1108 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
1109 | session_id_len) == 0) { | |
0f113f3e MC |
1110 | if (s->sid_ctx_length != s->session->sid_ctx_length |
1111 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { | |
1112 | /* actually a client application bug */ | |
1113 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1114 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1115 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
1116 | goto f_err; | |
1117 | } | |
1118 | s->hit = 1; | |
6e3d0153 | 1119 | } else { |
0f113f3e | 1120 | /* |
6e3d0153 EK |
1121 | * If we were trying for session-id reuse but the server |
1122 | * didn't echo the ID, make a new SSL_SESSION. | |
1123 | * In the case of EAP-FAST and PAC, we do not send a session ID, | |
1124 | * so the PAC-based session secret is always preserved. It'll be | |
1125 | * overwritten if the server refuses resumption. | |
0f113f3e MC |
1126 | */ |
1127 | if (s->session->session_id_length > 0) { | |
1128 | if (!ssl_get_new_session(s, 0)) { | |
1129 | goto f_err; | |
1130 | } | |
1131 | } | |
50932c4a | 1132 | |
fc5ce51d EK |
1133 | s->session->session_id_length = session_id_len; |
1134 | /* session_id_len could be 0 */ | |
1135 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
1136 | session_id_len); | |
0f113f3e | 1137 | } |
fc5ce51d | 1138 | |
50932c4a | 1139 | c = ssl_get_cipher_by_char(s, cipherchars); |
0f113f3e MC |
1140 | if (c == NULL) { |
1141 | /* unknown cipher */ | |
1142 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1143 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); |
0f113f3e MC |
1144 | goto f_err; |
1145 | } | |
1146 | /* Set version disabled mask now we know version */ | |
1147 | if (!SSL_USE_TLS1_2_CIPHERS(s)) | |
4d69f9e6 | 1148 | s->s3->tmp.mask_ssl = SSL_TLSV1_2; |
0f113f3e | 1149 | else |
4d69f9e6 | 1150 | s->s3->tmp.mask_ssl = 0; |
2b573382 DSH |
1151 | /* Skip TLS v1.0 ciphersuites if SSLv3 */ |
1152 | if ((c->algorithm_ssl & SSL_TLSV1) && s->version == SSL3_VERSION) | |
1153 | s->s3->tmp.mask_ssl |= SSL_TLSV1; | |
0f113f3e MC |
1154 | /* |
1155 | * If it is a disabled cipher we didn't send it in client hello, so | |
1156 | * return an error. | |
1157 | */ | |
1158 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
1159 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1160 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1161 | goto f_err; |
1162 | } | |
0f113f3e MC |
1163 | |
1164 | sk = ssl_get_ciphers_by_id(s); | |
1165 | i = sk_SSL_CIPHER_find(sk, c); | |
1166 | if (i < 0) { | |
1167 | /* we did not say we would use this cipher */ | |
1168 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1169 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
1170 | goto f_err; |
1171 | } | |
1172 | ||
1173 | /* | |
1174 | * Depending on the session caching (internal/external), the cipher | |
1175 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1176 | * set and use it for comparison. | |
1177 | */ | |
1178 | if (s->session->cipher) | |
1179 | s->session->cipher_id = s->session->cipher->id; | |
1180 | if (s->hit && (s->session->cipher_id != c->id)) { | |
9e9858d1 | 1181 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1182 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
9e9858d1 RS |
1183 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
1184 | goto f_err; | |
0f113f3e MC |
1185 | } |
1186 | s->s3->tmp.new_cipher = c; | |
0f113f3e MC |
1187 | /* lets get the compression algorithm */ |
1188 | /* COMPRESSION */ | |
73999b62 | 1189 | if (!PACKET_get_1(pkt, &compression)) { |
f0659bdb | 1190 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
1191 | al = SSL_AD_DECODE_ERROR; |
1192 | goto f_err; | |
1193 | } | |
09b6c2ef | 1194 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 1195 | if (compression != 0) { |
0f113f3e | 1196 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1197 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1198 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1199 | goto f_err; | |
1200 | } | |
1201 | /* | |
1202 | * If compression is disabled we'd better not try to resume a session | |
1203 | * using compression. | |
1204 | */ | |
1205 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 1206 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
1207 | goto f_err; |
1208 | } | |
09b6c2ef | 1209 | #else |
fc5ce51d | 1210 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 1211 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1212 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1213 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
1214 | goto f_err; | |
1215 | } | |
fc5ce51d | 1216 | if (compression == 0) |
0f113f3e MC |
1217 | comp = NULL; |
1218 | else if (!ssl_allow_compression(s)) { | |
1219 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1220 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 1221 | goto f_err; |
fc5ce51d EK |
1222 | } else { |
1223 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
1224 | } | |
0f113f3e | 1225 | |
fc5ce51d | 1226 | if (compression != 0 && comp == NULL) { |
0f113f3e | 1227 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 1228 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
1229 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
1230 | goto f_err; | |
1231 | } else { | |
1232 | s->s3->tmp.new_compression = comp; | |
1233 | } | |
09b6c2ef | 1234 | #endif |
761772d7 | 1235 | |
0f113f3e | 1236 | /* TLS extensions */ |
73999b62 | 1237 | if (!ssl_parse_serverhello_tlsext(s, pkt)) { |
b9908bf9 | 1238 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT); |
0f113f3e MC |
1239 | goto err; |
1240 | } | |
0f113f3e | 1241 | |
73999b62 | 1242 | if (PACKET_remaining(pkt) != 0) { |
0f113f3e MC |
1243 | /* wrong packet length */ |
1244 | al = SSL_AD_DECODE_ERROR; | |
b9908bf9 | 1245 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH); |
0f113f3e MC |
1246 | goto f_err; |
1247 | } | |
1248 | ||
8723588e MC |
1249 | #ifndef OPENSSL_NO_SCTP |
1250 | if (SSL_IS_DTLS(s) && s->hit) { | |
1251 | unsigned char sctpauthkey[64]; | |
1252 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
1253 | ||
1254 | /* | |
1255 | * Add new shared key for SCTP-Auth, will be ignored if | |
1256 | * no SCTP used. | |
1257 | */ | |
141eb8c6 MC |
1258 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
1259 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
8723588e MC |
1260 | |
1261 | if (SSL_export_keying_material(s, sctpauthkey, | |
1262 | sizeof(sctpauthkey), | |
1263 | labelbuffer, | |
1264 | sizeof(labelbuffer), NULL, 0, | |
1265 | 0) <= 0) | |
1266 | goto err; | |
1267 | ||
1268 | BIO_ctrl(SSL_get_wbio(s), | |
1269 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
1270 | sizeof(sctpauthkey), sctpauthkey); | |
1271 | } | |
1272 | #endif | |
1273 | ||
b9908bf9 | 1274 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1275 | f_err: |
1276 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1277 | err: | |
fe3a3291 | 1278 | ossl_statem_set_error(s); |
b9908bf9 | 1279 | return MSG_PROCESS_ERROR; |
0f113f3e | 1280 | } |
d02b48c6 | 1281 | |
be3583fa | 1282 | MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1283 | { |
1284 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
1285 | unsigned long cert_list_len, cert_len; | |
1286 | X509 *x = NULL; | |
b6981744 | 1287 | const unsigned char *certstart, *certbytes; |
b9908bf9 MC |
1288 | STACK_OF(X509) *sk = NULL; |
1289 | EVP_PKEY *pkey = NULL; | |
0f113f3e MC |
1290 | |
1291 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 1292 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1293 | goto err; |
0f113f3e MC |
1294 | } |
1295 | ||
73999b62 MC |
1296 | if (!PACKET_get_net_3(pkt, &cert_list_len) |
1297 | || PACKET_remaining(pkt) != cert_list_len) { | |
0f113f3e | 1298 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1299 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1300 | goto f_err; |
1301 | } | |
73999b62 MC |
1302 | while (PACKET_remaining(pkt)) { |
1303 | if (!PACKET_get_net_3(pkt, &cert_len) | |
1304 | || !PACKET_get_bytes(pkt, &certbytes, cert_len)) { | |
0f113f3e | 1305 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1306 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1307 | SSL_R_CERT_LENGTH_MISMATCH); |
1308 | goto f_err; | |
1309 | } | |
1310 | ||
df758a85 MC |
1311 | certstart = certbytes; |
1312 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1313 | if (x == NULL) { |
1314 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 1315 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
1316 | goto f_err; |
1317 | } | |
df758a85 | 1318 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 1319 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1320 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1321 | SSL_R_CERT_LENGTH_MISMATCH); |
1322 | goto f_err; | |
1323 | } | |
1324 | if (!sk_X509_push(sk, x)) { | |
b9908bf9 | 1325 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 1326 | goto err; |
0f113f3e MC |
1327 | } |
1328 | x = NULL; | |
0f113f3e MC |
1329 | } |
1330 | ||
1331 | i = ssl_verify_cert_chain(s, sk); | |
55a9a16f | 1332 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { |
0f113f3e | 1333 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 1334 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1335 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
1336 | goto f_err; | |
1337 | } | |
1338 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1339 | if (i > 1) { | |
b9908bf9 | 1340 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
1341 | al = SSL_AD_HANDSHAKE_FAILURE; |
1342 | goto f_err; | |
1343 | } | |
1344 | ||
c34b0f99 | 1345 | s->session->peer_chain = sk; |
0f113f3e MC |
1346 | /* |
1347 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
1348 | * which we don't include in s3_srvr.c | |
1349 | */ | |
1350 | x = sk_X509_value(sk, 0); | |
1351 | sk = NULL; | |
1352 | /* | |
1353 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1354 | */ | |
1355 | ||
8382fd3a | 1356 | pkey = X509_get0_pubkey(x); |
0f113f3e | 1357 | |
55a9a16f | 1358 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
1359 | x = NULL; |
1360 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1361 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1362 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
1363 | goto f_err; | |
1364 | } | |
1365 | ||
1366 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1367 | if (i < 0) { |
0f113f3e MC |
1368 | x = NULL; |
1369 | al = SSL3_AL_FATAL; | |
b9908bf9 | 1370 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
1371 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
1372 | goto f_err; | |
1373 | } | |
1374 | ||
55a9a16f | 1375 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); |
e44380a9 DB |
1376 | if (exp_idx >= 0 && i != exp_idx |
1377 | && (exp_idx != SSL_PKEY_GOST_EC || | |
1378 | (i != SSL_PKEY_GOST12_512 && i != SSL_PKEY_GOST12_256 | |
1379 | && i != SSL_PKEY_GOST01))) { | |
55a9a16f MC |
1380 | x = NULL; |
1381 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 1382 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
55a9a16f MC |
1383 | SSL_R_WRONG_CERTIFICATE_TYPE); |
1384 | goto f_err; | |
0f113f3e | 1385 | } |
a273c6ee | 1386 | s->session->peer_type = i; |
55a9a16f MC |
1387 | |
1388 | X509_free(s->session->peer); | |
05f0fb9f | 1389 | X509_up_ref(x); |
55a9a16f | 1390 | s->session->peer = x; |
0f113f3e MC |
1391 | s->session->verify_result = s->verify_result; |
1392 | ||
1393 | x = NULL; | |
b9908bf9 | 1394 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1395 | goto done; |
1396 | ||
0f113f3e | 1397 | f_err: |
66696478 | 1398 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1399 | err: |
fe3a3291 | 1400 | ossl_statem_set_error(s); |
66696478 | 1401 | done: |
0f113f3e MC |
1402 | X509_free(x); |
1403 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1404 | return ret; |
0f113f3e | 1405 | } |
d02b48c6 | 1406 | |
be3583fa | 1407 | MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, PACKET *pkt) |
b9908bf9 | 1408 | { |
6e59a892 | 1409 | EVP_MD_CTX *md_ctx; |
192e4bbb | 1410 | int al, j; |
b9908bf9 MC |
1411 | long alg_k, alg_a; |
1412 | EVP_PKEY *pkey = NULL; | |
1413 | const EVP_MD *md = NULL; | |
1414 | #ifndef OPENSSL_NO_RSA | |
1415 | RSA *rsa = NULL; | |
1416 | #endif | |
b9908bf9 | 1417 | #ifndef OPENSSL_NO_EC |
61dd9f7a | 1418 | EVP_PKEY_CTX *pctx = NULL; |
b9908bf9 | 1419 | #endif |
73999b62 | 1420 | PACKET save_param_start, signature; |
b9908bf9 | 1421 | |
bfb0641f | 1422 | md_ctx = EVP_MD_CTX_new(); |
6e59a892 RL |
1423 | if (md_ctx == NULL) { |
1424 | al = SSL_AD_INTERNAL_ERROR; | |
1425 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
1426 | goto f_err; | |
1427 | } | |
b9908bf9 MC |
1428 | |
1429 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
1430 | ||
73999b62 | 1431 | save_param_start = *pkt; |
8d92c1f8 | 1432 | |
fb79abe3 | 1433 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a DSH |
1434 | EVP_PKEY_free(s->s3->peer_tmp); |
1435 | s->s3->peer_tmp = NULL; | |
d02b48c6 | 1436 | #endif |
8d92c1f8 | 1437 | |
0f113f3e | 1438 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; |
d02b48c6 | 1439 | |
0f113f3e | 1440 | al = SSL_AD_DECODE_ERROR; |
f2be92b9 | 1441 | |
ddac1974 | 1442 | #ifndef OPENSSL_NO_PSK |
7689082b DSH |
1443 | /* PSK ciphersuites are preceded by an identity hint */ |
1444 | if (alg_k & SSL_PSK) { | |
32942870 | 1445 | PACKET psk_identity_hint; |
73999b62 | 1446 | if (!PACKET_get_length_prefixed_2(pkt, &psk_identity_hint)) { |
f0659bdb | 1447 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1448 | goto f_err; |
1449 | } | |
0f113f3e MC |
1450 | |
1451 | /* | |
1452 | * Store PSK identity hint for later use, hint is used in | |
1453 | * ssl3_send_client_key_exchange. Assume that the maximum length of | |
1454 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1455 | * identity. | |
1456 | */ | |
32942870 | 1457 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { |
0f113f3e | 1458 | al = SSL_AD_HANDSHAKE_FAILURE; |
b9908bf9 | 1459 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG); |
0f113f3e MC |
1460 | goto f_err; |
1461 | } | |
8098fc56 | 1462 | |
558ceae7 DSH |
1463 | if (PACKET_remaining(&psk_identity_hint) == 0) { |
1464 | OPENSSL_free(s->session->psk_identity_hint); | |
1465 | s->session->psk_identity_hint = NULL; | |
1466 | } else if (!PACKET_strndup(&psk_identity_hint, | |
32942870 EK |
1467 | &s->session->psk_identity_hint)) { |
1468 | al = SSL_AD_INTERNAL_ERROR; | |
1469 | goto f_err; | |
0f113f3e | 1470 | } |
7689082b DSH |
1471 | } |
1472 | ||
1473 | /* Nothing else to do for plain PSK or RSAPSK */ | |
1474 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
0f113f3e MC |
1475 | } else |
1476 | #endif /* !OPENSSL_NO_PSK */ | |
bbf431cb MC |
1477 | /* |
1478 | * Dummy "if" to ensure sane C code in the event of various OPENSSL_NO_* | |
1479 | * options | |
1480 | */ | |
1481 | if (0) { | |
1482 | } | |
edc032b5 | 1483 | #ifndef OPENSSL_NO_SRP |
bbf431cb | 1484 | else if (alg_k & SSL_kSRP) { |
32942870 | 1485 | PACKET prime, generator, salt, server_pub; |
73999b62 MC |
1486 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1487 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1488 | || !PACKET_get_length_prefixed_1(pkt, &salt) | |
1489 | || !PACKET_get_length_prefixed_2(pkt, &server_pub)) { | |
f0659bdb | 1490 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1491 | goto f_err; |
1492 | } | |
0f113f3e | 1493 | |
32942870 EK |
1494 | if ((s->srp_ctx.N = |
1495 | BN_bin2bn(PACKET_data(&prime), | |
1496 | PACKET_remaining(&prime), NULL)) == NULL | |
1497 | || (s->srp_ctx.g = | |
1498 | BN_bin2bn(PACKET_data(&generator), | |
1499 | PACKET_remaining(&generator), NULL)) == NULL | |
1500 | || (s->srp_ctx.s = | |
1501 | BN_bin2bn(PACKET_data(&salt), | |
1502 | PACKET_remaining(&salt), NULL)) == NULL | |
1503 | || (s->srp_ctx.B = | |
1504 | BN_bin2bn(PACKET_data(&server_pub), | |
1505 | PACKET_remaining(&server_pub), NULL)) == NULL) { | |
f0659bdb | 1506 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB); |
0f113f3e MC |
1507 | goto err; |
1508 | } | |
0f113f3e MC |
1509 | |
1510 | if (!srp_verify_server_param(s, &al)) { | |
b9908bf9 | 1511 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS); |
0f113f3e MC |
1512 | goto f_err; |
1513 | } | |
0989790b | 1514 | |
edc032b5 | 1515 | /* We must check if there is a certificate */ |
8df53b7a | 1516 | if (alg_a & (SSL_aRSA|SSL_aDSS)) |
8382fd3a | 1517 | pkey = X509_get0_pubkey(s->session->peer); |
0f113f3e | 1518 | } |
361a1191 | 1519 | #endif /* !OPENSSL_NO_SRP */ |
bc36ee62 | 1520 | #ifndef OPENSSL_NO_DH |
7689082b | 1521 | else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
32942870 | 1522 | PACKET prime, generator, pub_key; |
0f113f3e | 1523 | |
fb79abe3 DSH |
1524 | DH *dh; |
1525 | ||
73999b62 MC |
1526 | if (!PACKET_get_length_prefixed_2(pkt, &prime) |
1527 | || !PACKET_get_length_prefixed_2(pkt, &generator) | |
1528 | || !PACKET_get_length_prefixed_2(pkt, &pub_key)) { | |
f0659bdb | 1529 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1530 | goto f_err; |
1531 | } | |
0f113f3e | 1532 | |
fb79abe3 DSH |
1533 | s->s3->peer_tmp = EVP_PKEY_new(); |
1534 | dh = DH_new(); | |
1535 | ||
1536 | if (s->s3->peer_tmp == NULL || dh == NULL) { | |
1537 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
1538 | DH_free(dh); | |
1539 | goto err; | |
1540 | } | |
1541 | ||
1542 | if (EVP_PKEY_assign_DH(s->s3->peer_tmp, dh) == 0) { | |
1543 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
1544 | DH_free(dh); | |
0f113f3e MC |
1545 | goto err; |
1546 | } | |
0f113f3e | 1547 | |
32942870 EK |
1548 | if ((dh->p = BN_bin2bn(PACKET_data(&prime), |
1549 | PACKET_remaining(&prime), NULL)) == NULL | |
1550 | || (dh->g = BN_bin2bn(PACKET_data(&generator), | |
1551 | PACKET_remaining(&generator), NULL)) == NULL | |
1552 | || (dh->pub_key = | |
1553 | BN_bin2bn(PACKET_data(&pub_key), | |
1554 | PACKET_remaining(&pub_key), NULL)) == NULL) { | |
f0659bdb | 1555 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_BN_LIB); |
0f113f3e MC |
1556 | goto err; |
1557 | } | |
0f113f3e | 1558 | |
32942870 | 1559 | if (BN_is_zero(dh->p) || BN_is_zero(dh->g) || BN_is_zero(dh->pub_key)) { |
f0659bdb | 1560 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_DH_VALUE); |
61e72d76 GL |
1561 | goto f_err; |
1562 | } | |
1563 | ||
0f113f3e MC |
1564 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { |
1565 | al = SSL_AD_HANDSHAKE_FAILURE; | |
b9908bf9 | 1566 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL); |
0f113f3e MC |
1567 | goto f_err; |
1568 | } | |
8df53b7a | 1569 | if (alg_a & (SSL_aRSA|SSL_aDSS)) |
8382fd3a | 1570 | pkey = X509_get0_pubkey(s->session->peer); |
0f113f3e | 1571 | /* else anonymous DH, so no certificate or pkey. */ |
0f113f3e MC |
1572 | } |
1573 | #endif /* !OPENSSL_NO_DH */ | |
ea262260 | 1574 | |
10bf4fc2 | 1575 | #ifndef OPENSSL_NO_EC |
7689082b | 1576 | else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
32942870 | 1577 | PACKET encoded_pt; |
b6981744 | 1578 | const unsigned char *ecparams; |
61dd9f7a | 1579 | int curve_nid; |
0f113f3e | 1580 | |
0f113f3e MC |
1581 | /* |
1582 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
32942870 | 1583 | * public key. For now we only support named (not generic) curves and |
8098fc56 | 1584 | * ECParameters in this case is just three bytes. |
0f113f3e | 1585 | */ |
73999b62 | 1586 | if (!PACKET_get_bytes(pkt, &ecparams, 3)) { |
f0659bdb | 1587 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
0f113f3e MC |
1588 | goto f_err; |
1589 | } | |
1590 | /* | |
1591 | * Check curve is one of our preferences, if not server has sent an | |
1592 | * invalid curve. ECParameters is 3 bytes. | |
1593 | */ | |
32942870 | 1594 | if (!tls1_check_curve(s, ecparams, 3)) { |
f0659bdb | 1595 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_CURVE); |
0f113f3e MC |
1596 | goto f_err; |
1597 | } | |
1598 | ||
61dd9f7a DSH |
1599 | curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2)); |
1600 | if (curve_nid == 0) { | |
0f113f3e | 1601 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1602 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
0f113f3e MC |
1603 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
1604 | goto f_err; | |
1605 | } | |
1606 | ||
61dd9f7a DSH |
1607 | /* Set up EVP_PKEY with named curve as parameters */ |
1608 | pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_EC, NULL); | |
1609 | if (pctx == NULL | |
1610 | || EVP_PKEY_paramgen_init(pctx) <= 0 | |
1611 | || EVP_PKEY_CTX_set_ec_paramgen_curve_nid(pctx, curve_nid) <= 0 | |
1612 | || EVP_PKEY_paramgen(pctx, &s->s3->peer_tmp) <= 0) { | |
1613 | al = SSL_AD_INTERNAL_ERROR; | |
1614 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
1615 | goto f_err; | |
0f113f3e | 1616 | } |
61dd9f7a DSH |
1617 | EVP_PKEY_CTX_free(pctx); |
1618 | pctx = NULL; | |
0f113f3e | 1619 | |
73999b62 | 1620 | if (!PACKET_get_length_prefixed_1(pkt, &encoded_pt)) { |
f0659bdb | 1621 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
8098fc56 MC |
1622 | goto f_err; |
1623 | } | |
0f113f3e | 1624 | |
61dd9f7a DSH |
1625 | if (EC_KEY_oct2key(EVP_PKEY_get0_EC_KEY(s->s3->peer_tmp), |
1626 | PACKET_data(&encoded_pt), | |
cae41364 | 1627 | PACKET_remaining(&encoded_pt), NULL) == 0) { |
f0659bdb | 1628 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_ECPOINT); |
0f113f3e MC |
1629 | goto f_err; |
1630 | } | |
0f113f3e MC |
1631 | |
1632 | /* | |
1633 | * The ECC/TLS specification does not mention the use of DSA to sign | |
1634 | * ECParameters in the server key exchange message. We do support RSA | |
1635 | * and ECDSA. | |
1636 | */ | |
1637 | if (0) ; | |
1638 | # ifndef OPENSSL_NO_RSA | |
1639 | else if (alg_a & SSL_aRSA) | |
8382fd3a | 1640 | pkey = X509_get0_pubkey(s->session->peer); |
0f113f3e | 1641 | # endif |
10bf4fc2 | 1642 | # ifndef OPENSSL_NO_EC |
0f113f3e | 1643 | else if (alg_a & SSL_aECDSA) |
8382fd3a | 1644 | pkey = X509_get0_pubkey(s->session->peer); |
0f113f3e MC |
1645 | # endif |
1646 | /* else anonymous ECDH, so no certificate or pkey. */ | |
0f113f3e MC |
1647 | } else if (alg_k) { |
1648 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 1649 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
0f113f3e MC |
1650 | goto f_err; |
1651 | } | |
10bf4fc2 | 1652 | #endif /* !OPENSSL_NO_EC */ |
0f113f3e | 1653 | |
0f113f3e MC |
1654 | /* if it was signed, check the signature */ |
1655 | if (pkey != NULL) { | |
32942870 EK |
1656 | PACKET params; |
1657 | /* | |
1658 | * |pkt| now points to the beginning of the signature, so the difference | |
1659 | * equals the length of the parameters. | |
1660 | */ | |
1661 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
1662 | PACKET_remaining(&save_param_start) - | |
73999b62 | 1663 | PACKET_remaining(pkt))) { |
32942870 | 1664 | al = SSL_AD_INTERNAL_ERROR; |
f0659bdb | 1665 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
32942870 EK |
1666 | goto f_err; |
1667 | } | |
1668 | ||
0f113f3e | 1669 | if (SSL_USE_SIGALGS(s)) { |
b6981744 | 1670 | const unsigned char *sigalgs; |
0f113f3e | 1671 | int rv; |
73999b62 | 1672 | if (!PACKET_get_bytes(pkt, &sigalgs, 2)) { |
f0659bdb | 1673 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
0f113f3e MC |
1674 | goto f_err; |
1675 | } | |
32942870 | 1676 | rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey); |
0f113f3e MC |
1677 | if (rv == -1) |
1678 | goto err; | |
1679 | else if (rv == 0) { | |
1680 | goto f_err; | |
1681 | } | |
a2f9200f | 1682 | #ifdef SSL_DEBUG |
0f113f3e MC |
1683 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
1684 | #endif | |
3aeb9348 | 1685 | } else if (EVP_PKEY_id(pkey) == EVP_PKEY_RSA) { |
192e4bbb | 1686 | md = EVP_md5_sha1(); |
32942870 | 1687 | } else { |
0f113f3e | 1688 | md = EVP_sha1(); |
32942870 | 1689 | } |
0f113f3e | 1690 | |
73999b62 MC |
1691 | if (!PACKET_get_length_prefixed_2(pkt, &signature) |
1692 | || PACKET_remaining(pkt) != 0) { | |
f0659bdb | 1693 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1694 | goto f_err; |
1695 | } | |
0f113f3e | 1696 | j = EVP_PKEY_size(pkey); |
8098fc56 | 1697 | if (j < 0) { |
b9908bf9 | 1698 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
8098fc56 MC |
1699 | goto f_err; |
1700 | } | |
0f113f3e MC |
1701 | |
1702 | /* | |
8098fc56 | 1703 | * Check signature length |
0f113f3e | 1704 | */ |
32942870 | 1705 | if (PACKET_remaining(&signature) > (size_t)j) { |
0f113f3e | 1706 | /* wrong packet length */ |
b9908bf9 | 1707 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH); |
0f113f3e MC |
1708 | goto f_err; |
1709 | } | |
6e59a892 RL |
1710 | if (EVP_VerifyInit_ex(md_ctx, md, NULL) <= 0 |
1711 | || EVP_VerifyUpdate(md_ctx, &(s->s3->client_random[0]), | |
192e4bbb | 1712 | SSL3_RANDOM_SIZE) <= 0 |
6e59a892 | 1713 | || EVP_VerifyUpdate(md_ctx, &(s->s3->server_random[0]), |
192e4bbb | 1714 | SSL3_RANDOM_SIZE) <= 0 |
6e59a892 | 1715 | || EVP_VerifyUpdate(md_ctx, PACKET_data(¶ms), |
192e4bbb DSH |
1716 | PACKET_remaining(¶ms)) <= 0) { |
1717 | al = SSL_AD_INTERNAL_ERROR; | |
1718 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
1719 | goto f_err; | |
1720 | } | |
6e59a892 | 1721 | if (EVP_VerifyFinal(md_ctx, PACKET_data(&signature), |
192e4bbb DSH |
1722 | PACKET_remaining(&signature), pkey) <= 0) { |
1723 | /* bad signature */ | |
1724 | al = SSL_AD_DECRYPT_ERROR; | |
1725 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
1726 | goto f_err; | |
0f113f3e MC |
1727 | } |
1728 | } else { | |
7689082b DSH |
1729 | /* aNULL, aSRP or PSK do not need public keys */ |
1730 | if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_PSK)) { | |
0f113f3e MC |
1731 | /* Might be wrong key type, check it */ |
1732 | if (ssl3_check_cert_and_algorithm(s)) | |
1733 | /* Otherwise this shouldn't happen */ | |
b9908bf9 | 1734 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
0f113f3e MC |
1735 | goto err; |
1736 | } | |
1737 | /* still data left over */ | |
73999b62 | 1738 | if (PACKET_remaining(pkt) != 0) { |
b9908bf9 | 1739 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
0f113f3e MC |
1740 | goto f_err; |
1741 | } | |
1742 | } | |
bfb0641f | 1743 | EVP_MD_CTX_free(md_ctx); |
b9908bf9 | 1744 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1745 | f_err: |
1746 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1747 | err: | |
bc36ee62 | 1748 | #ifndef OPENSSL_NO_RSA |
d6407083 | 1749 | RSA_free(rsa); |
6b521df3 | 1750 | #endif |
10bf4fc2 | 1751 | #ifndef OPENSSL_NO_EC |
61dd9f7a | 1752 | EVP_PKEY_CTX_free(pctx); |
6b521df3 | 1753 | #endif |
bfb0641f | 1754 | EVP_MD_CTX_free(md_ctx); |
fe3a3291 | 1755 | ossl_statem_set_error(s); |
b9908bf9 | 1756 | return MSG_PROCESS_ERROR; |
0f113f3e | 1757 | } |
d02b48c6 | 1758 | |
be3583fa | 1759 | MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1760 | { |
1761 | int ret = MSG_PROCESS_ERROR; | |
1762 | unsigned int list_len, ctype_num, i, name_len; | |
1763 | X509_NAME *xn = NULL; | |
b6981744 EK |
1764 | const unsigned char *data; |
1765 | const unsigned char *namestart, *namebytes; | |
b9908bf9 | 1766 | STACK_OF(X509_NAME) *ca_sk = NULL; |
0f113f3e MC |
1767 | |
1768 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { | |
b9908bf9 | 1769 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1770 | goto err; |
1771 | } | |
1772 | ||
1773 | /* get the certificate types */ | |
73999b62 MC |
1774 | if (!PACKET_get_1(pkt, &ctype_num) |
1775 | || !PACKET_get_bytes(pkt, &data, ctype_num)) { | |
ac112332 | 1776 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1777 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
ac112332 MC |
1778 | goto err; |
1779 | } | |
b548a1f1 RS |
1780 | OPENSSL_free(s->cert->ctypes); |
1781 | s->cert->ctypes = NULL; | |
0f113f3e MC |
1782 | if (ctype_num > SSL3_CT_NUMBER) { |
1783 | /* If we exceed static buffer copy all to cert structure */ | |
1784 | s->cert->ctypes = OPENSSL_malloc(ctype_num); | |
1785 | if (s->cert->ctypes == NULL) { | |
b9908bf9 | 1786 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1787 | goto err; |
1788 | } | |
ac112332 | 1789 | memcpy(s->cert->ctypes, data, ctype_num); |
0f113f3e MC |
1790 | s->cert->ctype_num = (size_t)ctype_num; |
1791 | ctype_num = SSL3_CT_NUMBER; | |
1792 | } | |
1793 | for (i = 0; i < ctype_num; i++) | |
ac112332 MC |
1794 | s->s3->tmp.ctype[i] = data[i]; |
1795 | ||
0f113f3e | 1796 | if (SSL_USE_SIGALGS(s)) { |
73999b62 MC |
1797 | if (!PACKET_get_net_2(pkt, &list_len) |
1798 | || !PACKET_get_bytes(pkt, &data, list_len)) { | |
0f113f3e | 1799 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
1800 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
1801 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
1802 | goto err; |
1803 | } | |
ac112332 | 1804 | |
0f113f3e MC |
1805 | /* Clear certificate digests and validity flags */ |
1806 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
d376e57d | 1807 | s->s3->tmp.md[i] = NULL; |
6383d316 | 1808 | s->s3->tmp.valid_flags[i] = 0; |
0f113f3e | 1809 | } |
ac112332 | 1810 | if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) { |
0f113f3e | 1811 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1812 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
1813 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
1814 | goto err; | |
1815 | } | |
1816 | if (!tls1_process_sigalgs(s)) { | |
1817 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 1818 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1819 | goto err; |
1820 | } | |
a0f63828 DSH |
1821 | } else { |
1822 | ssl_set_default_md(s); | |
0f113f3e MC |
1823 | } |
1824 | ||
1825 | /* get the CA RDNs */ | |
73999b62 MC |
1826 | if (!PACKET_get_net_2(pkt, &list_len) |
1827 | || PACKET_remaining(pkt) != list_len) { | |
0f113f3e | 1828 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1829 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1830 | goto err; |
1831 | } | |
1832 | ||
73999b62 MC |
1833 | while (PACKET_remaining(pkt)) { |
1834 | if (!PACKET_get_net_2(pkt, &name_len) | |
1835 | || !PACKET_get_bytes(pkt, &namebytes, name_len)) { | |
0f113f3e | 1836 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
1837 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
1838 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
1839 | goto err; |
1840 | } | |
1841 | ||
ac112332 | 1842 | namestart = namebytes; |
0f113f3e | 1843 | |
ac112332 MC |
1844 | if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes, |
1845 | name_len)) == NULL) { | |
3c33c6f6 | 1846 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1847 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); |
3c33c6f6 | 1848 | goto err; |
0f113f3e MC |
1849 | } |
1850 | ||
ac112332 | 1851 | if (namebytes != (namestart + name_len)) { |
0f113f3e | 1852 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1853 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
1854 | SSL_R_CA_DN_LENGTH_MISMATCH); |
1855 | goto err; | |
1856 | } | |
1857 | if (!sk_X509_NAME_push(ca_sk, xn)) { | |
b9908bf9 | 1858 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1859 | goto err; |
1860 | } | |
0f113f3e MC |
1861 | } |
1862 | ||
0f113f3e MC |
1863 | /* we should setup a certificate to return.... */ |
1864 | s->s3->tmp.cert_req = 1; | |
1865 | s->s3->tmp.ctype_num = ctype_num; | |
222561fe | 1866 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
0f113f3e MC |
1867 | s->s3->tmp.ca_names = ca_sk; |
1868 | ca_sk = NULL; | |
1869 | ||
b9908bf9 | 1870 | ret = MSG_PROCESS_CONTINUE_READING; |
cc273a93 | 1871 | goto done; |
0f113f3e | 1872 | err: |
fe3a3291 | 1873 | ossl_statem_set_error(s); |
cc273a93 | 1874 | done: |
222561fe | 1875 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
b9908bf9 | 1876 | return ret; |
0f113f3e MC |
1877 | } |
1878 | ||
1879 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
dfeab068 | 1880 | { |
0f113f3e | 1881 | return (X509_NAME_cmp(*a, *b)); |
dfeab068 | 1882 | } |
dfeab068 | 1883 | |
be3583fa | 1884 | MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1885 | { |
1886 | int al; | |
1887 | unsigned int ticklen; | |
1888 | unsigned long ticket_lifetime_hint; | |
b9908bf9 | 1889 | |
73999b62 MC |
1890 | if (!PACKET_get_net_4(pkt, &ticket_lifetime_hint) |
1891 | || !PACKET_get_net_2(pkt, &ticklen) | |
1892 | || PACKET_remaining(pkt) != ticklen) { | |
e711da71 | 1893 | al = SSL_AD_DECODE_ERROR; |
f0659bdb | 1894 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
e711da71 EK |
1895 | goto f_err; |
1896 | } | |
1897 | ||
1898 | /* Server is allowed to change its mind and send an empty ticket. */ | |
1899 | if (ticklen == 0) | |
c9de4a20 | 1900 | return MSG_PROCESS_CONTINUE_READING; |
e711da71 | 1901 | |
98ece4ee MC |
1902 | if (s->session->session_id_length > 0) { |
1903 | int i = s->session_ctx->session_cache_mode; | |
1904 | SSL_SESSION *new_sess; | |
1905 | /* | |
1906 | * We reused an existing session, so we need to replace it with a new | |
1907 | * one | |
1908 | */ | |
1909 | if (i & SSL_SESS_CACHE_CLIENT) { | |
1910 | /* | |
1911 | * Remove the old session from the cache | |
1912 | */ | |
1913 | if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) { | |
1914 | if (s->session_ctx->remove_session_cb != NULL) | |
1915 | s->session_ctx->remove_session_cb(s->session_ctx, | |
1916 | s->session); | |
1917 | } else { | |
1918 | /* We carry on if this fails */ | |
1919 | SSL_CTX_remove_session(s->session_ctx, s->session); | |
1920 | } | |
1921 | } | |
1922 | ||
1923 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
1924 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 1925 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
1926 | goto f_err; |
1927 | } | |
1928 | ||
1929 | SSL_SESSION_free(s->session); | |
1930 | s->session = new_sess; | |
1931 | } | |
1932 | ||
b548a1f1 RS |
1933 | OPENSSL_free(s->session->tlsext_tick); |
1934 | s->session->tlsext_ticklen = 0; | |
e711da71 | 1935 | |
0f113f3e | 1936 | s->session->tlsext_tick = OPENSSL_malloc(ticklen); |
a71edf3b | 1937 | if (s->session->tlsext_tick == NULL) { |
b9908bf9 | 1938 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1939 | goto err; |
1940 | } | |
73999b62 | 1941 | if (!PACKET_copy_bytes(pkt, s->session->tlsext_tick, ticklen)) { |
561e12bb | 1942 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1943 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
1944 | goto f_err; |
1945 | } | |
e711da71 EK |
1946 | |
1947 | s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint; | |
0f113f3e MC |
1948 | s->session->tlsext_ticklen = ticklen; |
1949 | /* | |
1950 | * There are two ways to detect a resumed ticket session. One is to set | |
1951 | * an appropriate session ID and then the server must return a match in | |
1952 | * ServerHello. This allows the normal client session ID matching to work | |
1953 | * and we know much earlier that the ticket has been accepted. The | |
1954 | * other way is to set zero length session ID when the ticket is | |
1955 | * presented and rely on the handshake to determine session resumption. | |
1956 | * We choose the former approach because this fits in with assumptions | |
1957 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
1958 | * SHA256 is disabled) hash of the ticket. | |
1959 | */ | |
561e12bb | 1960 | EVP_Digest(s->session->tlsext_tick, ticklen, |
0f113f3e | 1961 | s->session->session_id, &s->session->session_id_length, |
0f113f3e | 1962 | EVP_sha256(), NULL); |
b9908bf9 | 1963 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1964 | f_err: |
1965 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1966 | err: | |
fe3a3291 | 1967 | ossl_statem_set_error(s); |
b9908bf9 | 1968 | return MSG_PROCESS_ERROR; |
0f113f3e | 1969 | } |
67c8e7f4 | 1970 | |
be3583fa | 1971 | MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, PACKET *pkt) |
b9908bf9 MC |
1972 | { |
1973 | int al; | |
1974 | unsigned long resplen; | |
1975 | unsigned int type; | |
b9908bf9 | 1976 | |
73999b62 | 1977 | if (!PACKET_get_1(pkt, &type) |
ac63710a | 1978 | || type != TLSEXT_STATUSTYPE_ocsp) { |
0f113f3e | 1979 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1980 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE); |
0f113f3e MC |
1981 | goto f_err; |
1982 | } | |
73999b62 MC |
1983 | if (!PACKET_get_net_3(pkt, &resplen) |
1984 | || PACKET_remaining(pkt) != resplen) { | |
0f113f3e | 1985 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1986 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1987 | goto f_err; |
1988 | } | |
ac63710a | 1989 | s->tlsext_ocsp_resp = OPENSSL_malloc(resplen); |
a71edf3b | 1990 | if (s->tlsext_ocsp_resp == NULL) { |
0f113f3e | 1991 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1992 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1993 | goto f_err; |
1994 | } | |
73999b62 | 1995 | if (!PACKET_copy_bytes(pkt, s->tlsext_ocsp_resp, resplen)) { |
ac63710a | 1996 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1997 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); |
ac63710a MC |
1998 | goto f_err; |
1999 | } | |
0f113f3e | 2000 | s->tlsext_ocsp_resplen = resplen; |
b9908bf9 | 2001 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
2002 | f_err: |
2003 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
fe3a3291 | 2004 | ossl_statem_set_error(s); |
b9908bf9 | 2005 | return MSG_PROCESS_ERROR; |
0f113f3e | 2006 | } |
d02b48c6 | 2007 | |
be3583fa | 2008 | MSG_PROCESS_RETURN tls_process_server_done(SSL *s, PACKET *pkt) |
b9908bf9 | 2009 | { |
73999b62 | 2010 | if (PACKET_remaining(pkt) > 0) { |
0f113f3e MC |
2011 | /* should contain no data */ |
2012 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
b9908bf9 | 2013 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); |
fe3a3291 | 2014 | ossl_statem_set_error(s); |
b9908bf9 | 2015 | return MSG_PROCESS_ERROR; |
0f113f3e | 2016 | } |
b9908bf9 MC |
2017 | |
2018 | #ifndef OPENSSL_NO_SRP | |
2019 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2020 | if (SRP_Calc_A_param(s) <= 0) { | |
2021 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
2022 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 2023 | ossl_statem_set_error(s); |
b9908bf9 MC |
2024 | return MSG_PROCESS_ERROR; |
2025 | } | |
2026 | } | |
2027 | #endif | |
2028 | ||
a455d0f6 MC |
2029 | /* |
2030 | * at this point we check that we have the required stuff from | |
2031 | * the server | |
2032 | */ | |
2033 | if (!ssl3_check_cert_and_algorithm(s)) { | |
2034 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
fe3a3291 | 2035 | ossl_statem_set_error(s); |
a455d0f6 MC |
2036 | return MSG_PROCESS_ERROR; |
2037 | } | |
2038 | ||
bb1aaab4 MC |
2039 | /* |
2040 | * Call the ocsp status callback if needed. The |tlsext_ocsp_resp| and | |
2041 | * |tlsext_ocsp_resplen| values will be set if we actually received a status | |
2042 | * message, or NULL and -1 otherwise | |
2043 | */ | |
b1931d43 | 2044 | if (s->tlsext_status_type != -1 && s->ctx->tlsext_status_cb != NULL) { |
bb1aaab4 MC |
2045 | int ret; |
2046 | ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); | |
2047 | if (ret == 0) { | |
2048 | ssl3_send_alert(s, SSL3_AL_FATAL, | |
2049 | SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE); | |
2050 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, | |
2051 | SSL_R_INVALID_STATUS_RESPONSE); | |
2052 | return MSG_PROCESS_ERROR; | |
2053 | } | |
2054 | if (ret < 0) { | |
2055 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2056 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, ERR_R_MALLOC_FAILURE); | |
2057 | return MSG_PROCESS_ERROR; | |
2058 | } | |
2059 | } | |
2060 | ||
473483d4 MC |
2061 | #ifndef OPENSSL_NO_SCTP |
2062 | /* Only applies to renegotiation */ | |
2063 | if (SSL_IS_DTLS(s) && BIO_dgram_is_sctp(SSL_get_wbio(s)) | |
2064 | && s->renegotiate != 0) | |
2065 | return MSG_PROCESS_CONTINUE_PROCESSING; | |
2066 | else | |
2067 | #endif | |
2068 | return MSG_PROCESS_FINISHED_READING; | |
0f113f3e | 2069 | } |
176f31dd | 2070 | |
b9908bf9 | 2071 | int tls_construct_client_key_exchange(SSL *s) |
0f113f3e MC |
2072 | { |
2073 | unsigned char *p; | |
2074 | int n; | |
7689082b DSH |
2075 | #ifndef OPENSSL_NO_PSK |
2076 | size_t pskhdrlen = 0; | |
2077 | #endif | |
0f113f3e | 2078 | unsigned long alg_k; |
bc36ee62 | 2079 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
2080 | unsigned char *q; |
2081 | EVP_PKEY *pkey = NULL; | |
923ffa97 | 2082 | EVP_PKEY_CTX *pctx = NULL; |
79df9d62 | 2083 | #endif |
fb79abe3 | 2084 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) |
61dd9f7a | 2085 | EVP_PKEY *ckey = NULL, *skey = NULL; |
fb79abe3 DSH |
2086 | #endif |
2087 | #ifndef OPENSSL_NO_EC | |
0f113f3e MC |
2088 | unsigned char *encodedPoint = NULL; |
2089 | int encoded_pt_len = 0; | |
ea262260 | 2090 | #endif |
c660ec63 DSH |
2091 | unsigned char *pms = NULL; |
2092 | size_t pmslen = 0; | |
7689082b | 2093 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
d02b48c6 | 2094 | |
b9908bf9 | 2095 | p = ssl_handshake_start(s); |
d02b48c6 | 2096 | |
7689082b DSH |
2097 | |
2098 | #ifndef OPENSSL_NO_PSK | |
b9908bf9 MC |
2099 | if (alg_k & SSL_PSK) { |
2100 | int psk_err = 1; | |
2101 | /* | |
2102 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2103 | * \0-terminated identity. The last byte is for us for simulating | |
2104 | * strnlen. | |
2105 | */ | |
2106 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2107 | size_t identitylen; | |
2108 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2109 | size_t psklen; | |
2110 | ||
2111 | if (s->psk_client_callback == NULL) { | |
2112 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2113 | SSL_R_PSK_NO_CLIENT_CB); | |
2114 | goto err; | |
2115 | } | |
7689082b | 2116 | |
b9908bf9 | 2117 | memset(identity, 0, sizeof(identity)); |
7689082b | 2118 | |
b9908bf9 MC |
2119 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2120 | identity, sizeof(identity) - 1, | |
2121 | psk, sizeof(psk)); | |
7689082b | 2122 | |
b9908bf9 MC |
2123 | if (psklen > PSK_MAX_PSK_LEN) { |
2124 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2125 | ERR_R_INTERNAL_ERROR); | |
2126 | goto psk_err; | |
2127 | } else if (psklen == 0) { | |
2128 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2129 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
2130 | goto psk_err; | |
2131 | } | |
b9908bf9 | 2132 | OPENSSL_free(s->s3->tmp.psk); |
7644a9ae | 2133 | s->s3->tmp.psk = OPENSSL_memdup(psk, psklen); |
b9908bf9 | 2134 | OPENSSL_cleanse(psk, psklen); |
7689082b | 2135 | |
b9908bf9 MC |
2136 | if (s->s3->tmp.psk == NULL) { |
2137 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2138 | goto memerr; | |
2139 | } | |
7689082b | 2140 | |
b9908bf9 | 2141 | s->s3->tmp.psklen = psklen; |
b9908bf9 MC |
2142 | identitylen = strlen(identity); |
2143 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
2144 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2145 | ERR_R_INTERNAL_ERROR); | |
2146 | goto psk_err; | |
2147 | } | |
2148 | OPENSSL_free(s->session->psk_identity); | |
7644a9ae | 2149 | s->session->psk_identity = OPENSSL_strdup(identity); |
b9908bf9 | 2150 | if (s->session->psk_identity == NULL) { |
7689082b | 2151 | OPENSSL_cleanse(identity, sizeof(identity)); |
b9908bf9 | 2152 | goto memerr; |
7689082b | 2153 | } |
d02b48c6 | 2154 | |
b9908bf9 MC |
2155 | s2n(identitylen, p); |
2156 | memcpy(p, identity, identitylen); | |
2157 | pskhdrlen = 2 + identitylen; | |
2158 | p += identitylen; | |
2159 | psk_err = 0; | |
2160 | psk_err: | |
2161 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2162 | if (psk_err != 0) { | |
2163 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2164 | goto err; | |
0f113f3e | 2165 | } |
b9908bf9 MC |
2166 | } |
2167 | if (alg_k & SSL_kPSK) { | |
2168 | n = 0; | |
2169 | } else | |
2170 | #endif | |
2171 | ||
2172 | /* Fool emacs indentation */ | |
2173 | if (0) { | |
2174 | } | |
bc36ee62 | 2175 | #ifndef OPENSSL_NO_RSA |
b9908bf9 | 2176 | else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
923ffa97 | 2177 | size_t enclen; |
b9908bf9 MC |
2178 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2179 | pms = OPENSSL_malloc(pmslen); | |
a71edf3b | 2180 | if (pms == NULL) |
b9908bf9 MC |
2181 | goto memerr; |
2182 | ||
2183 | if (s->session->peer == NULL) { | |
2184 | /* | |
2185 | * We should always have a server certificate with SSL_kRSA. | |
2186 | */ | |
2187 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2188 | ERR_R_INTERNAL_ERROR); | |
2189 | goto err; | |
2190 | } | |
0f113f3e | 2191 | |
8382fd3a | 2192 | pkey = X509_get0_pubkey(s->session->peer); |
3aeb9348 | 2193 | if (EVP_PKEY_get0_RSA(pkey) == NULL) { |
361a1191 KR |
2194 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, |
2195 | ERR_R_INTERNAL_ERROR); | |
361a1191 | 2196 | goto err; |
b9908bf9 | 2197 | } |
0f113f3e | 2198 | |
b9908bf9 MC |
2199 | pms[0] = s->client_version >> 8; |
2200 | pms[1] = s->client_version & 0xff; | |
2201 | if (RAND_bytes(pms + 2, pmslen - 2) <= 0) | |
2202 | goto err; | |
0f113f3e | 2203 | |
b9908bf9 MC |
2204 | q = p; |
2205 | /* Fix buf for TLS and beyond */ | |
2206 | if (s->version > SSL3_VERSION) | |
2207 | p += 2; | |
923ffa97 | 2208 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
923ffa97 DSH |
2209 | if (pctx == NULL || EVP_PKEY_encrypt_init(pctx) <= 0 |
2210 | || EVP_PKEY_encrypt(pctx, NULL, &enclen, pms, pmslen) <= 0) { | |
2211 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2212 | ERR_R_EVP_LIB); | |
2213 | goto err; | |
2214 | } | |
2215 | if (EVP_PKEY_encrypt(pctx, p, &enclen, pms, pmslen) <= 0) { | |
2216 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2217 | SSL_R_BAD_RSA_ENCRYPT); | |
2218 | goto err; | |
2219 | } | |
2220 | n = enclen; | |
2221 | EVP_PKEY_CTX_free(pctx); | |
2222 | pctx = NULL; | |
0f113f3e | 2223 | # ifdef PKCS1_CHECK |
b9908bf9 MC |
2224 | if (s->options & SSL_OP_PKCS1_CHECK_1) |
2225 | p[1]++; | |
2226 | if (s->options & SSL_OP_PKCS1_CHECK_2) | |
2227 | tmp_buf[0] = 0x70; | |
0f113f3e | 2228 | # endif |
0f113f3e | 2229 | |
b9908bf9 MC |
2230 | /* Fix buf for TLS and beyond */ |
2231 | if (s->version > SSL3_VERSION) { | |
2232 | s2n(n, q); | |
2233 | n += 2; | |
0f113f3e | 2234 | } |
b9908bf9 | 2235 | } |
f9b3bff6 | 2236 | #endif |
bc36ee62 | 2237 | #ifndef OPENSSL_NO_DH |
bc71f910 | 2238 | else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
fb79abe3 DSH |
2239 | DH *dh_clnt = NULL; |
2240 | skey = s->s3->peer_tmp; | |
2241 | if (skey == NULL) { | |
bc71f910 DSH |
2242 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, |
2243 | ERR_R_INTERNAL_ERROR); | |
2244 | goto err; | |
0f113f3e | 2245 | } |
fb79abe3 DSH |
2246 | ckey = ssl_generate_pkey(skey, NID_undef); |
2247 | dh_clnt = EVP_PKEY_get0_DH(ckey); | |
0f113f3e | 2248 | |
fb79abe3 DSH |
2249 | if (dh_clnt == NULL || ssl_derive(s, ckey, skey) == 0) { |
2250 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2251 | ERR_R_INTERNAL_ERROR); | |
b9908bf9 MC |
2252 | goto err; |
2253 | } | |
fb79abe3 | 2254 | |
0f113f3e | 2255 | |
bc71f910 DSH |
2256 | /* send off the data */ |
2257 | n = BN_num_bytes(dh_clnt->pub_key); | |
2258 | s2n(n, p); | |
2259 | BN_bn2bin(dh_clnt->pub_key, p); | |
2260 | n += 2; | |
fb79abe3 DSH |
2261 | EVP_PKEY_free(ckey); |
2262 | ckey = NULL; | |
b9908bf9 MC |
2263 | } |
2264 | #endif | |
0f113f3e | 2265 | |
b9908bf9 | 2266 | #ifndef OPENSSL_NO_EC |
ce0c1f2b | 2267 | else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
0f113f3e | 2268 | |
ce0c1f2b DSH |
2269 | skey = s->s3->peer_tmp; |
2270 | if ((skey == NULL) || EVP_PKEY_get0_EC_KEY(skey) == NULL) { | |
2271 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
266483d2 | 2272 | ERR_R_INTERNAL_ERROR); |
ce0c1f2b | 2273 | goto err; |
0f113f3e | 2274 | } |
b9908bf9 | 2275 | |
61dd9f7a | 2276 | ckey = ssl_generate_pkey(skey, NID_undef); |
b9908bf9 | 2277 | |
61dd9f7a DSH |
2278 | if (ssl_derive(s, ckey, skey) == 0) { |
2279 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EVP_LIB); | |
b9908bf9 MC |
2280 | goto err; |
2281 | } | |
2282 | ||
61dd9f7a DSH |
2283 | /* Generate encoding of client key */ |
2284 | encoded_pt_len = EC_KEY_key2buf(EVP_PKEY_get0_EC_KEY(ckey), | |
2285 | POINT_CONVERSION_UNCOMPRESSED, | |
2286 | &encodedPoint, NULL); | |
cae41364 | 2287 | |
c66ce5eb DSH |
2288 | if (encoded_pt_len == 0) { |
2289 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); | |
2290 | goto err; | |
2291 | } | |
b9908bf9 | 2292 | |
61dd9f7a DSH |
2293 | EVP_PKEY_free(ckey); |
2294 | ckey = NULL; | |
2295 | ||
c66ce5eb | 2296 | n = encoded_pt_len; |
b9908bf9 | 2297 | |
c66ce5eb DSH |
2298 | *p = n; /* length of encoded point */ |
2299 | /* Encoded point will be copied here */ | |
2300 | p += 1; | |
2301 | /* copy the point */ | |
2302 | memcpy(p, encodedPoint, n); | |
2303 | /* increment n to account for length field */ | |
2304 | n += 1; | |
0f113f3e | 2305 | |
b9908bf9 | 2306 | /* Free allocated memory */ |
b9908bf9 | 2307 | OPENSSL_free(encodedPoint); |
b9908bf9 MC |
2308 | } |
2309 | #endif /* !OPENSSL_NO_EC */ | |
2a9b9654 | 2310 | #ifndef OPENSSL_NO_GOST |
b9908bf9 MC |
2311 | else if (alg_k & SSL_kGOST) { |
2312 | /* GOST key exchange message creation */ | |
2313 | EVP_PKEY_CTX *pkey_ctx; | |
2314 | X509 *peer_cert; | |
2315 | size_t msglen; | |
2316 | unsigned int md_len; | |
2317 | unsigned char shared_ukm[32], tmp[256]; | |
2318 | EVP_MD_CTX *ukm_hash; | |
e44380a9 DB |
2319 | int dgst_nid = NID_id_GostR3411_94; |
2320 | if ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aGOST12) != 0) | |
2321 | dgst_nid = NID_id_GostR3411_2012_256; | |
2322 | ||
b9908bf9 MC |
2323 | |
2324 | pmslen = 32; | |
2325 | pms = OPENSSL_malloc(pmslen); | |
a71edf3b | 2326 | if (pms == NULL) |
b9908bf9 | 2327 | goto memerr; |
7689082b | 2328 | |
b9908bf9 MC |
2329 | /* |
2330 | * Get server sertificate PKEY and create ctx from it | |
2331 | */ | |
2332 | peer_cert = s->session->peer; | |
2333 | if (!peer_cert) { | |
2334 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2335 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); | |
77d514c5 MC |
2336 | goto err; |
2337 | } | |
2338 | ||
8382fd3a | 2339 | pkey_ctx = EVP_PKEY_CTX_new(X509_get0_pubkey(peer_cert), NULL); |
a71edf3b MC |
2340 | if (pkey_ctx == NULL) { |
2341 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2342 | ERR_R_MALLOC_FAILURE); | |
2343 | goto err; | |
2344 | } | |
b9908bf9 MC |
2345 | /* |
2346 | * If we have send a certificate, and certificate key | |
5f3d93e4 | 2347 | * parameters match those of server certificate, use |
b9908bf9 MC |
2348 | * certificate key for key exchange |
2349 | */ | |
0f113f3e | 2350 | |
b9908bf9 MC |
2351 | /* Otherwise, generate ephemeral key pair */ |
2352 | ||
5f3d93e4 MC |
2353 | if (pkey_ctx == NULL |
2354 | || EVP_PKEY_encrypt_init(pkey_ctx) <= 0 | |
2355 | /* Generate session key */ | |
2356 | || RAND_bytes(pms, pmslen) <= 0) { | |
b9908bf9 MC |
2357 | EVP_PKEY_CTX_free(pkey_ctx); |
2358 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2359 | ERR_R_INTERNAL_ERROR); | |
2360 | goto err; | |
2361 | }; | |
c660ec63 | 2362 | /* |
b9908bf9 | 2363 | * If we have client certificate, use its secret as peer key |
c660ec63 | 2364 | */ |
b9908bf9 MC |
2365 | if (s->s3->tmp.cert_req && s->cert->key->privatekey) { |
2366 | if (EVP_PKEY_derive_set_peer | |
2367 | (pkey_ctx, s->cert->key->privatekey) <= 0) { | |
2368 | /* | |
2369 | * If there was an error - just ignore it. Ephemeral key | |
2370 | * * would be used | |
2371 | */ | |
2372 | ERR_clear_error(); | |
c660ec63 DSH |
2373 | } |
2374 | } | |
b9908bf9 MC |
2375 | /* |
2376 | * Compute shared IV and store it in algorithm-specific context | |
2377 | * data | |
2378 | */ | |
bfb0641f | 2379 | ukm_hash = EVP_MD_CTX_new(); |
5f3d93e4 | 2380 | if (EVP_DigestInit(ukm_hash, |
e44380a9 | 2381 | EVP_get_digestbynid(dgst_nid)) <= 0 |
5f3d93e4 MC |
2382 | || EVP_DigestUpdate(ukm_hash, s->s3->client_random, |
2383 | SSL3_RANDOM_SIZE) <= 0 | |
2384 | || EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2385 | SSL3_RANDOM_SIZE) <= 0 | |
2386 | || EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len) <= 0) { | |
bfb0641f | 2387 | EVP_MD_CTX_free(ukm_hash); |
5f3d93e4 MC |
2388 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, |
2389 | ERR_R_INTERNAL_ERROR); | |
2390 | goto err; | |
2391 | } | |
bfb0641f | 2392 | EVP_MD_CTX_free(ukm_hash); |
b9908bf9 MC |
2393 | if (EVP_PKEY_CTX_ctrl |
2394 | (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8, | |
2395 | shared_ukm) < 0) { | |
2396 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2397 | SSL_R_LIBRARY_BUG); | |
2398 | goto err; | |
c660ec63 | 2399 | } |
b9908bf9 MC |
2400 | /* Make GOST keytransport blob message */ |
2401 | /* | |
2402 | * Encapsulate it into sequence | |
2403 | */ | |
2404 | *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; | |
2405 | msglen = 255; | |
5f3d93e4 | 2406 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) <= 0) { |
b9908bf9 MC |
2407 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, |
2408 | SSL_R_LIBRARY_BUG); | |
c660ec63 DSH |
2409 | goto err; |
2410 | } | |
b9908bf9 MC |
2411 | if (msglen >= 0x80) { |
2412 | *(p++) = 0x81; | |
2413 | *(p++) = msglen & 0xff; | |
2414 | n = msglen + 3; | |
2415 | } else { | |
2416 | *(p++) = msglen & 0xff; | |
2417 | n = msglen + 2; | |
2418 | } | |
2419 | memcpy(p, tmp, msglen); | |
2420 | /* Check if pubkey from client certificate was used */ | |
2421 | if (EVP_PKEY_CTX_ctrl | |
2422 | (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) { | |
2423 | /* Set flag "skip certificate verify" */ | |
2424 | s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; | |
2425 | } | |
2426 | EVP_PKEY_CTX_free(pkey_ctx); | |
b9908bf9 MC |
2427 | |
2428 | } | |
2a9b9654 | 2429 | #endif |
b9908bf9 MC |
2430 | #ifndef OPENSSL_NO_SRP |
2431 | else if (alg_k & SSL_kSRP) { | |
2432 | if (s->srp_ctx.A != NULL) { | |
2433 | /* send off the data */ | |
2434 | n = BN_num_bytes(s->srp_ctx.A); | |
2435 | s2n(n, p); | |
2436 | BN_bn2bin(s->srp_ctx.A, p); | |
2437 | n += 2; | |
2438 | } else { | |
2439 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2440 | ERR_R_INTERNAL_ERROR); | |
2441 | goto err; | |
2442 | } | |
2443 | OPENSSL_free(s->session->srp_username); | |
7644a9ae | 2444 | s->session->srp_username = OPENSSL_strdup(s->srp_ctx.login); |
b9908bf9 MC |
2445 | if (s->session->srp_username == NULL) { |
2446 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2447 | ERR_R_MALLOC_FAILURE); | |
69f68237 MC |
2448 | goto err; |
2449 | } | |
c660ec63 | 2450 | } |
b9908bf9 MC |
2451 | #endif |
2452 | else { | |
2453 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2454 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2455 | goto err; | |
2456 | } | |
2457 | ||
2458 | #ifndef OPENSSL_NO_PSK | |
2459 | n += pskhdrlen; | |
2460 | #endif | |
2461 | ||
2462 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) { | |
2463 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2464 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2465 | goto err; | |
2466 | } | |
2467 | ||
61dd9f7a DSH |
2468 | if (pms != NULL) { |
2469 | s->s3->tmp.pms = pms; | |
2470 | s->s3->tmp.pmslen = pmslen; | |
2471 | } | |
b9908bf9 MC |
2472 | |
2473 | return 1; | |
c660ec63 DSH |
2474 | memerr: |
2475 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2476 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); |
0f113f3e | 2477 | err: |
4b45c6e5 | 2478 | OPENSSL_clear_free(pms, pmslen); |
76106e60 | 2479 | s->s3->tmp.pms = NULL; |
923ffa97 DSH |
2480 | #ifndef OPENSSL_NO_RSA |
2481 | EVP_PKEY_CTX_free(pctx); | |
2482 | #endif | |
10bf4fc2 | 2483 | #ifndef OPENSSL_NO_EC |
b548a1f1 | 2484 | OPENSSL_free(encodedPoint); |
fb79abe3 DSH |
2485 | #endif |
2486 | #if !defined(OPENSSL_NO_EC) || !defined(OPENSSL_NO_DH) | |
61dd9f7a | 2487 | EVP_PKEY_free(ckey); |
7689082b DSH |
2488 | #endif |
2489 | #ifndef OPENSSL_NO_PSK | |
2490 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
2491 | s->s3->tmp.psk = NULL; | |
0f113f3e | 2492 | #endif |
fe3a3291 | 2493 | ossl_statem_set_error(s); |
b9908bf9 MC |
2494 | return 0; |
2495 | } | |
2496 | ||
2497 | int tls_client_key_exchange_post_work(SSL *s) | |
2498 | { | |
2499 | unsigned char *pms = NULL; | |
2500 | size_t pmslen = 0; | |
2501 | ||
2502 | #ifndef OPENSSL_NO_SRP | |
2503 | /* Check for SRP */ | |
2504 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2505 | if (!srp_generate_client_master_secret(s)) { | |
2506 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
2507 | ERR_R_INTERNAL_ERROR); | |
2508 | goto err; | |
2509 | } | |
2510 | return 1; | |
2511 | } | |
2512 | #endif | |
2513 | pms = s->s3->tmp.pms; | |
2514 | pmslen = s->s3->tmp.pmslen; | |
2515 | ||
2516 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
2517 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2518 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
2519 | goto err; | |
2520 | } | |
2521 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
2522 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2523 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
2524 | goto err; | |
2525 | } | |
473483d4 MC |
2526 | |
2527 | #ifndef OPENSSL_NO_SCTP | |
2528 | if (SSL_IS_DTLS(s)) { | |
2529 | unsigned char sctpauthkey[64]; | |
2530 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
2531 | ||
2532 | /* | |
2533 | * Add new shared key for SCTP-Auth, will be ignored if no SCTP | |
2534 | * used. | |
2535 | */ | |
141eb8c6 MC |
2536 | memcpy(labelbuffer, DTLS1_SCTP_AUTH_LABEL, |
2537 | sizeof(DTLS1_SCTP_AUTH_LABEL)); | |
473483d4 MC |
2538 | |
2539 | if (SSL_export_keying_material(s, sctpauthkey, | |
2540 | sizeof(sctpauthkey), labelbuffer, | |
2541 | sizeof(labelbuffer), NULL, 0, 0) <= 0) | |
2542 | goto err; | |
2543 | ||
2544 | BIO_ctrl(SSL_get_wbio(s), BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
2545 | sizeof(sctpauthkey), sctpauthkey); | |
2546 | } | |
2547 | #endif | |
2548 | ||
b9908bf9 MC |
2549 | return 1; |
2550 | err: | |
2551 | OPENSSL_clear_free(pms, pmslen); | |
2552 | s->s3->tmp.pms = NULL; | |
2553 | return 0; | |
0f113f3e | 2554 | } |
d02b48c6 | 2555 | |
b9908bf9 | 2556 | int tls_construct_client_verify(SSL *s) |
0f113f3e MC |
2557 | { |
2558 | unsigned char *p; | |
0f113f3e | 2559 | EVP_PKEY *pkey; |
a0f63828 | 2560 | const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys]; |
6e59a892 | 2561 | EVP_MD_CTX *mctx; |
0f113f3e | 2562 | unsigned u = 0; |
2a9b9654 | 2563 | unsigned long n = 0; |
a0f63828 DSH |
2564 | long hdatalen = 0; |
2565 | void *hdata; | |
0f113f3e | 2566 | |
bfb0641f | 2567 | mctx = EVP_MD_CTX_new(); |
6e59a892 RL |
2568 | if (mctx == NULL) { |
2569 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_MALLOC_FAILURE); | |
2570 | goto err; | |
2571 | } | |
0f113f3e | 2572 | |
b9908bf9 MC |
2573 | p = ssl_handshake_start(s); |
2574 | pkey = s->cert->key->privatekey; | |
a0f63828 DSH |
2575 | |
2576 | hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); | |
2577 | if (hdatalen <= 0) { | |
5f3d93e4 MC |
2578 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); |
2579 | goto err; | |
2580 | } | |
a0f63828 DSH |
2581 | if (SSL_USE_SIGALGS(s)) { |
2582 | if (!tls12_get_sigandhash(p, pkey, md)) { | |
b9908bf9 MC |
2583 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); |
2584 | goto err; | |
0f113f3e | 2585 | } |
a0f63828 | 2586 | p += 2; |
2a9b9654 | 2587 | n = 2; |
a0f63828 | 2588 | } |
855a54a9 | 2589 | #ifdef SSL_DEBUG |
a0f63828 | 2590 | fprintf(stderr, "Using client alg %s\n", EVP_MD_name(md)); |
b9908bf9 | 2591 | #endif |
6e59a892 RL |
2592 | if (!EVP_SignInit_ex(mctx, md, NULL) |
2593 | || !EVP_SignUpdate(mctx, hdata, hdatalen) | |
a0f63828 | 2594 | || (s->version == SSL3_VERSION |
6e59a892 | 2595 | && !EVP_MD_CTX_ctrl(mctx, EVP_CTRL_SSL3_MASTER_SECRET, |
a0f63828 DSH |
2596 | s->session->master_key_length, |
2597 | s->session->master_key)) | |
6e59a892 | 2598 | || !EVP_SignFinal(mctx, p + 2, &u, pkey)) { |
a0f63828 DSH |
2599 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB); |
2600 | goto err; | |
2601 | } | |
2a9b9654 | 2602 | #ifndef OPENSSL_NO_GOST |
3aeb9348 DSH |
2603 | { |
2604 | int pktype = EVP_PKEY_id(pkey); | |
2605 | if (pktype == NID_id_GostR3410_2001 | |
2606 | || pktype == NID_id_GostR3410_2012_256 | |
2607 | || pktype == NID_id_GostR3410_2012_512) | |
2608 | BUF_reverse(p + 2, NULL, u); | |
b9908bf9 | 2609 | } |
2a9b9654 | 2610 | #endif |
a0f63828 DSH |
2611 | |
2612 | s2n(u, p); | |
2a9b9654 | 2613 | n += u + 2; |
a0f63828 DSH |
2614 | /* Digest cached records and discard handshake buffer */ |
2615 | if (!ssl3_digest_cached_records(s, 0)) | |
2616 | goto err; | |
b9908bf9 MC |
2617 | if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) { |
2618 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); | |
2619 | goto err; | |
0f113f3e | 2620 | } |
b9908bf9 | 2621 | |
bfb0641f | 2622 | EVP_MD_CTX_free(mctx); |
b9908bf9 | 2623 | return 1; |
0f113f3e | 2624 | err: |
bfb0641f | 2625 | EVP_MD_CTX_free(mctx); |
b9908bf9 | 2626 | return 0; |
0f113f3e MC |
2627 | } |
2628 | ||
2629 | /* | |
2630 | * Check a certificate can be used for client authentication. Currently check | |
2631 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
2632 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
2633 | */ |
2634 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e | 2635 | { |
0f113f3e MC |
2636 | if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey) |
2637 | return 0; | |
2638 | /* If no suitable signature algorithm can't use certificate */ | |
d376e57d | 2639 | if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys]) |
0f113f3e MC |
2640 | return 0; |
2641 | /* | |
2642 | * If strict mode check suitability of chain before using it. This also | |
2643 | * adjusts suite B digest if necessary. | |
2644 | */ | |
2645 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
2646 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
2647 | return 0; | |
0f113f3e MC |
2648 | return 1; |
2649 | } | |
0d609395 | 2650 | |
be3583fa | 2651 | WORK_STATE tls_prepare_client_certificate(SSL *s, WORK_STATE wst) |
0f113f3e MC |
2652 | { |
2653 | X509 *x509 = NULL; | |
2654 | EVP_PKEY *pkey = NULL; | |
2655 | int i; | |
2656 | ||
b9908bf9 | 2657 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
2658 | /* Let cert callback update client certificates if required */ |
2659 | if (s->cert->cert_cb) { | |
2660 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
2661 | if (i < 0) { | |
2662 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 2663 | return WORK_MORE_A; |
0f113f3e MC |
2664 | } |
2665 | if (i == 0) { | |
2666 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 2667 | ossl_statem_set_error(s); |
0f113f3e MC |
2668 | return 0; |
2669 | } | |
2670 | s->rwstate = SSL_NOTHING; | |
2671 | } | |
2672 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
2673 | return WORK_FINISHED_CONTINUE; |
2674 | ||
2675 | /* Fall through to WORK_MORE_B */ | |
2676 | wst = WORK_MORE_B; | |
0f113f3e MC |
2677 | } |
2678 | ||
2679 | /* We need to get a client cert */ | |
b9908bf9 | 2680 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
2681 | /* |
2682 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
2683 | * return(-1); We then get retied later | |
2684 | */ | |
0f113f3e MC |
2685 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
2686 | if (i < 0) { | |
2687 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 2688 | return WORK_MORE_B; |
0f113f3e MC |
2689 | } |
2690 | s->rwstate = SSL_NOTHING; | |
2691 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
2692 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
2693 | i = 0; | |
2694 | } else if (i == 1) { | |
2695 | i = 0; | |
b9908bf9 | 2696 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
2697 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
2698 | } | |
2699 | ||
222561fe | 2700 | X509_free(x509); |
25aaa98a | 2701 | EVP_PKEY_free(pkey); |
0f113f3e MC |
2702 | if (i && !ssl3_check_client_certificate(s)) |
2703 | i = 0; | |
2704 | if (i == 0) { | |
2705 | if (s->version == SSL3_VERSION) { | |
2706 | s->s3->tmp.cert_req = 0; | |
2707 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 2708 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
2709 | } else { |
2710 | s->s3->tmp.cert_req = 2; | |
124037fd | 2711 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 2712 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
fe3a3291 | 2713 | ossl_statem_set_error(s); |
dab18ab5 DSH |
2714 | return 0; |
2715 | } | |
0f113f3e MC |
2716 | } |
2717 | } | |
2718 | ||
b9908bf9 | 2719 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
2720 | } |
2721 | ||
b9908bf9 MC |
2722 | /* Shouldn't ever get here */ |
2723 | return WORK_ERROR; | |
2724 | } | |
2725 | ||
2726 | int tls_construct_client_certificate(SSL *s) | |
2727 | { | |
2728 | if (!ssl3_output_cert_chain(s, | |
2729 | (s->s3->tmp.cert_req == | |
2730 | 2) ? NULL : s->cert->key)) { | |
2731 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
2732 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
fe3a3291 | 2733 | ossl_statem_set_error(s); |
b9908bf9 | 2734 | return 0; |
0f113f3e | 2735 | } |
b9908bf9 MC |
2736 | |
2737 | return 1; | |
0f113f3e MC |
2738 | } |
2739 | ||
2740 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 2741 | |
36d16f8e | 2742 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e | 2743 | { |
60f43e9e RL |
2744 | int i; |
2745 | #ifndef OPENSSL_NO_EC | |
2746 | int idx; | |
2747 | #endif | |
0f113f3e MC |
2748 | long alg_k, alg_a; |
2749 | EVP_PKEY *pkey = NULL; | |
26c79d56 | 2750 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 2751 | |
0f113f3e MC |
2752 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2753 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 2754 | |
0f113f3e | 2755 | /* we don't have a certificate */ |
55a9a16f | 2756 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 2757 | return (1); |
d02b48c6 | 2758 | |
0f113f3e | 2759 | /* This is the passed certificate */ |
d02b48c6 | 2760 | |
10bf4fc2 | 2761 | #ifndef OPENSSL_NO_EC |
60f43e9e | 2762 | idx = s->session->peer_type; |
0f113f3e | 2763 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 2764 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
2765 | /* check failed */ |
2766 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
2767 | goto f_err; | |
2768 | } else { | |
2769 | return 1; | |
2770 | } | |
2771 | } else if (alg_a & SSL_aECDSA) { | |
2772 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
2773 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
2774 | goto f_err; | |
0f113f3e MC |
2775 | } |
2776 | #endif | |
8382fd3a | 2777 | pkey = X509_get0_pubkey(s->session->peer); |
a273c6ee | 2778 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
2779 | |
2780 | /* Check that we have a certificate if we require one */ | |
2781 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
2782 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
2783 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
2784 | goto f_err; | |
2785 | } | |
bc36ee62 | 2786 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
2787 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
2788 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
2789 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
2790 | goto f_err; | |
2791 | } | |
d02b48c6 | 2792 | #endif |
bc36ee62 | 2793 | #ifndef OPENSSL_NO_RSA |
361a1191 KR |
2794 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK) && |
2795 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
2796 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
2797 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
2798 | goto f_err; | |
0f113f3e | 2799 | } |
79df9d62 | 2800 | #endif |
bc36ee62 | 2801 | #ifndef OPENSSL_NO_DH |
fb79abe3 | 2802 | if ((alg_k & SSL_kDHE) && (s->s3->peer_tmp == NULL)) { |
26c79d56 KR |
2803 | al = SSL_AD_INTERNAL_ERROR; |
2804 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e | 2805 | goto f_err; |
0f113f3e | 2806 | } |
d02b48c6 RE |
2807 | #endif |
2808 | ||
0f113f3e MC |
2809 | return (1); |
2810 | f_err: | |
26c79d56 | 2811 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
2812 | return (0); |
2813 | } | |
2814 | ||
e481f9b9 | 2815 | #ifndef OPENSSL_NO_NEXTPROTONEG |
b9908bf9 MC |
2816 | int tls_construct_next_proto(SSL *s) |
2817 | { | |
2818 | unsigned int len, padding_len; | |
2819 | unsigned char *d; | |
2820 | ||
2821 | len = s->next_proto_negotiated_len; | |
2822 | padding_len = 32 - ((len + 2) % 32); | |
2823 | d = (unsigned char *)s->init_buf->data; | |
2824 | d[4] = len; | |
2825 | memcpy(d + 5, s->next_proto_negotiated, len); | |
2826 | d[5 + len] = padding_len; | |
2827 | memset(d + 6 + len, 0, padding_len); | |
2828 | *(d++) = SSL3_MT_NEXT_PROTO; | |
2829 | l2n3(2 + len + padding_len, d); | |
2830 | s->init_num = 4 + 2 + len + padding_len; | |
2831 | s->init_off = 0; | |
2832 | ||
2833 | return 1; | |
2834 | } | |
6434abbf | 2835 | #endif |
368888bc DSH |
2836 | |
2837 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) | |
0f113f3e MC |
2838 | { |
2839 | int i = 0; | |
368888bc | 2840 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
2841 | if (s->ctx->client_cert_engine) { |
2842 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
2843 | SSL_get_client_CA_list(s), | |
2844 | px509, ppkey, NULL, NULL, NULL); | |
2845 | if (i != 0) | |
2846 | return i; | |
2847 | } | |
2848 | #endif | |
2849 | if (s->ctx->client_cert_cb) | |
2850 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
2851 | return i; | |
2852 | } | |
d45ba43d MC |
2853 | |
2854 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, | |
e9fa092e | 2855 | unsigned char *p) |
d45ba43d MC |
2856 | { |
2857 | int i, j = 0; | |
4a640fb6 | 2858 | const SSL_CIPHER *c; |
d45ba43d MC |
2859 | unsigned char *q; |
2860 | int empty_reneg_info_scsv = !s->renegotiate; | |
2861 | /* Set disabled masks for this session */ | |
2862 | ssl_set_client_disabled(s); | |
2863 | ||
2864 | if (sk == NULL) | |
2865 | return (0); | |
2866 | q = p; | |
d45ba43d MC |
2867 | |
2868 | for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { | |
2869 | c = sk_SSL_CIPHER_value(sk, i); | |
2870 | /* Skip disabled ciphers */ | |
2871 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) | |
2872 | continue; | |
e9fa092e | 2873 | j = s->method->put_cipher_by_char(c, p); |
d45ba43d MC |
2874 | p += j; |
2875 | } | |
2876 | /* | |
2877 | * If p == q, no ciphers; caller indicates an error. Otherwise, add | |
2878 | * applicable SCSVs. | |
2879 | */ | |
2880 | if (p != q) { | |
2881 | if (empty_reneg_info_scsv) { | |
2882 | static SSL_CIPHER scsv = { | |
2883 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
2884 | }; | |
e9fa092e | 2885 | j = s->method->put_cipher_by_char(&scsv, p); |
d45ba43d | 2886 | p += j; |
d45ba43d MC |
2887 | } |
2888 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
2889 | static SSL_CIPHER scsv = { | |
2890 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
2891 | }; | |
e9fa092e | 2892 | j = s->method->put_cipher_by_char(&scsv, p); |
d45ba43d MC |
2893 | p += j; |
2894 | } | |
2895 | } | |
2896 | ||
2897 | return (p - q); | |
2898 | } |