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d02b48c6 | 1 | /* ssl/s3_clnt.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
3 | * All rights reserved. |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
0f113f3e | 8 | * |
d02b48c6 RE |
9 | * This library is free for commercial and non-commercial use as long as |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
0f113f3e | 15 | * |
d02b48c6 RE |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
0f113f3e | 22 | * |
d02b48c6 RE |
23 | * Redistribution and use in source and binary forms, with or without |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
0f113f3e | 52 | * |
d02b48c6 RE |
53 | * The licence and distribution terms for any publically available version or |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
8c74b5e5 | 58 | /* ==================================================================== |
52b8dad8 | 59 | * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. |
8c74b5e5 BM |
60 | * |
61 | * Redistribution and use in source and binary forms, with or without | |
62 | * modification, are permitted provided that the following conditions | |
63 | * are met: | |
64 | * | |
65 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 66 | * notice, this list of conditions and the following disclaimer. |
8c74b5e5 BM |
67 | * |
68 | * 2. Redistributions in binary form must reproduce the above copyright | |
69 | * notice, this list of conditions and the following disclaimer in | |
70 | * the documentation and/or other materials provided with the | |
71 | * distribution. | |
72 | * | |
73 | * 3. All advertising materials mentioning features or use of this | |
74 | * software must display the following acknowledgment: | |
75 | * "This product includes software developed by the OpenSSL Project | |
76 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
77 | * | |
78 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
79 | * endorse or promote products derived from this software without | |
80 | * prior written permission. For written permission, please contact | |
81 | * openssl-core@openssl.org. | |
82 | * | |
83 | * 5. Products derived from this software may not be called "OpenSSL" | |
84 | * nor may "OpenSSL" appear in their names without prior written | |
85 | * permission of the OpenSSL Project. | |
86 | * | |
87 | * 6. Redistributions of any form whatsoever must retain the following | |
88 | * acknowledgment: | |
89 | * "This product includes software developed by the OpenSSL Project | |
90 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
91 | * | |
92 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
93 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
94 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
95 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
96 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
97 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
98 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
99 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
100 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
101 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
102 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
103 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
104 | * ==================================================================== | |
105 | * | |
106 | * This product includes cryptographic software written by Eric Young | |
107 | * (eay@cryptsoft.com). This product includes software written by Tim | |
108 | * Hudson (tjh@cryptsoft.com). | |
109 | * | |
110 | */ | |
ea262260 BM |
111 | /* ==================================================================== |
112 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. | |
113 | * | |
0f113f3e | 114 | * Portions of the attached software ("Contribution") are developed by |
ea262260 BM |
115 | * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. |
116 | * | |
117 | * The Contribution is licensed pursuant to the OpenSSL open source | |
118 | * license provided above. | |
119 | * | |
ea262260 BM |
120 | * ECC cipher suite support in OpenSSL originally written by |
121 | * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. | |
122 | * | |
123 | */ | |
ddac1974 NL |
124 | /* ==================================================================== |
125 | * Copyright 2005 Nokia. All rights reserved. | |
126 | * | |
127 | * The portions of the attached software ("Contribution") is developed by | |
128 | * Nokia Corporation and is licensed pursuant to the OpenSSL open source | |
129 | * license. | |
130 | * | |
131 | * The Contribution, originally written by Mika Kousa and Pasi Eronen of | |
132 | * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites | |
133 | * support (see RFC 4279) to OpenSSL. | |
134 | * | |
135 | * No patent licenses or other rights except those expressly stated in | |
136 | * the OpenSSL open source license shall be deemed granted or received | |
137 | * expressly, by implication, estoppel, or otherwise. | |
138 | * | |
139 | * No assurances are provided by Nokia that the Contribution does not | |
140 | * infringe the patent or other intellectual property rights of any third | |
141 | * party or that the license provides you with all the necessary rights | |
142 | * to make use of the Contribution. | |
143 | * | |
144 | * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN | |
145 | * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA | |
146 | * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY | |
147 | * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR | |
148 | * OTHERWISE. | |
149 | */ | |
d02b48c6 RE |
150 | |
151 | #include <stdio.h> | |
7b63c0fa | 152 | #include "ssl_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 | |
d45ba43d | 166 | static int ssl_set_version(SSL *s); |
0f113f3e | 167 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b); |
657da85e | 168 | static int ssl3_check_change(SSL *s); |
d45ba43d MC |
169 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
170 | unsigned char *p, | |
171 | int (*put_cb) (const SSL_CIPHER *, | |
172 | unsigned char *)); | |
ea262260 | 173 | |
d02b48c6 | 174 | |
6b691a5c | 175 | int ssl3_connect(SSL *s) |
0f113f3e MC |
176 | { |
177 | BUF_MEM *buf = NULL; | |
178 | unsigned long Time = (unsigned long)time(NULL); | |
179 | void (*cb) (const SSL *ssl, int type, int val) = NULL; | |
180 | int ret = -1; | |
181 | int new_state, state, skip = 0; | |
d02b48c6 | 182 | |
0f113f3e MC |
183 | RAND_add(&Time, sizeof(Time), 0); |
184 | ERR_clear_error(); | |
185 | clear_sys_error(); | |
4817504d | 186 | |
0f113f3e MC |
187 | if (s->info_callback != NULL) |
188 | cb = s->info_callback; | |
189 | else if (s->ctx->info_callback != NULL) | |
190 | cb = s->ctx->info_callback; | |
191 | ||
192 | s->in_handshake++; | |
69f68237 | 193 | if (!SSL_in_init(s) || SSL_in_before(s)) { |
61986d32 | 194 | if (!SSL_clear(s)) |
69f68237 MC |
195 | return -1; |
196 | } | |
0f113f3e MC |
197 | |
198 | #ifndef OPENSSL_NO_HEARTBEATS | |
199 | /* | |
200 | * If we're awaiting a HeartbeatResponse, pretend we already got and | |
201 | * don't await it anymore, because Heartbeats don't make sense during | |
202 | * handshakes anyway. | |
203 | */ | |
204 | if (s->tlsext_hb_pending) { | |
205 | s->tlsext_hb_pending = 0; | |
206 | s->tlsext_hb_seq++; | |
207 | } | |
208 | #endif | |
209 | ||
210 | for (;;) { | |
211 | state = s->state; | |
212 | ||
213 | switch (s->state) { | |
214 | case SSL_ST_RENEGOTIATE: | |
215 | s->renegotiate = 1; | |
216 | s->state = SSL_ST_CONNECT; | |
217 | s->ctx->stats.sess_connect_renegotiate++; | |
218 | /* break */ | |
219 | case SSL_ST_BEFORE: | |
220 | case SSL_ST_CONNECT: | |
221 | case SSL_ST_BEFORE | SSL_ST_CONNECT: | |
222 | case SSL_ST_OK | SSL_ST_CONNECT: | |
223 | ||
224 | s->server = 0; | |
225 | if (cb != NULL) | |
226 | cb(s, SSL_CB_HANDSHAKE_START, 1); | |
227 | ||
13c9bb3e MC |
228 | if ((s->version >> 8) != SSL3_VERSION_MAJOR |
229 | && s->version != TLS_ANY_VERSION) { | |
0f113f3e | 230 | SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR); |
cc273a93 | 231 | s->state = SSL_ST_ERR; |
0f113f3e MC |
232 | ret = -1; |
233 | goto end; | |
234 | } | |
235 | ||
d45ba43d MC |
236 | if (s->version != TLS_ANY_VERSION && |
237 | !ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) { | |
0f113f3e MC |
238 | SSLerr(SSL_F_SSL3_CONNECT, SSL_R_VERSION_TOO_LOW); |
239 | return -1; | |
240 | } | |
241 | ||
242 | /* s->version=SSL3_VERSION; */ | |
243 | s->type = SSL_ST_CONNECT; | |
244 | ||
245 | if (s->init_buf == NULL) { | |
246 | if ((buf = BUF_MEM_new()) == NULL) { | |
247 | ret = -1; | |
cc273a93 | 248 | s->state = SSL_ST_ERR; |
0f113f3e MC |
249 | goto end; |
250 | } | |
251 | if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) { | |
252 | ret = -1; | |
cc273a93 | 253 | s->state = SSL_ST_ERR; |
0f113f3e MC |
254 | goto end; |
255 | } | |
256 | s->init_buf = buf; | |
257 | buf = NULL; | |
258 | } | |
259 | ||
260 | if (!ssl3_setup_buffers(s)) { | |
261 | ret = -1; | |
262 | goto end; | |
263 | } | |
264 | ||
265 | /* setup buffing BIO */ | |
266 | if (!ssl_init_wbio_buffer(s, 0)) { | |
267 | ret = -1; | |
cc273a93 | 268 | s->state = SSL_ST_ERR; |
0f113f3e MC |
269 | goto end; |
270 | } | |
271 | ||
272 | /* don't push the buffering BIO quite yet */ | |
273 | ||
274 | ssl3_init_finished_mac(s); | |
275 | ||
276 | s->state = SSL3_ST_CW_CLNT_HELLO_A; | |
277 | s->ctx->stats.sess_connect++; | |
278 | s->init_num = 0; | |
0f113f3e MC |
279 | /* |
280 | * Should have been reset by ssl3_get_finished, too. | |
281 | */ | |
282 | s->s3->change_cipher_spec = 0; | |
283 | break; | |
284 | ||
285 | case SSL3_ST_CW_CLNT_HELLO_A: | |
286 | case SSL3_ST_CW_CLNT_HELLO_B: | |
287 | ||
288 | s->shutdown = 0; | |
289 | ret = ssl3_client_hello(s); | |
290 | if (ret <= 0) | |
291 | goto end; | |
292 | s->state = SSL3_ST_CR_SRVR_HELLO_A; | |
293 | s->init_num = 0; | |
294 | ||
295 | /* turn on buffering for the next lot of output */ | |
296 | if (s->bbio != s->wbio) | |
297 | s->wbio = BIO_push(s->bbio, s->wbio); | |
298 | ||
299 | break; | |
300 | ||
301 | case SSL3_ST_CR_SRVR_HELLO_A: | |
302 | case SSL3_ST_CR_SRVR_HELLO_B: | |
303 | ret = ssl3_get_server_hello(s); | |
304 | if (ret <= 0) | |
305 | goto end; | |
306 | ||
307 | if (s->hit) { | |
657da85e | 308 | s->state = SSL3_ST_CR_CHANGE_A; |
0f113f3e MC |
309 | if (s->tlsext_ticket_expected) { |
310 | /* receive renewed session ticket */ | |
311 | s->state = SSL3_ST_CR_SESSION_TICKET_A; | |
312 | } | |
0f113f3e MC |
313 | } else { |
314 | s->state = SSL3_ST_CR_CERT_A; | |
315 | } | |
316 | s->init_num = 0; | |
317 | break; | |
318 | case SSL3_ST_CR_CERT_A: | |
319 | case SSL3_ST_CR_CERT_B: | |
6e3d0153 | 320 | /* Noop (ret = 0) for everything but EAP-FAST. */ |
657da85e | 321 | ret = ssl3_check_change(s); |
6e3d0153 EK |
322 | if (ret < 0) |
323 | goto end; | |
324 | if (ret == 1) { | |
325 | s->hit = 1; | |
657da85e | 326 | s->state = SSL3_ST_CR_CHANGE_A; |
6e3d0153 EK |
327 | s->init_num = 0; |
328 | break; | |
329 | } | |
e481f9b9 | 330 | |
0f113f3e MC |
331 | /* Check if it is anon DH/ECDH, SRP auth */ |
332 | /* or PSK */ | |
7689082b DSH |
333 | if (!(s->s3->tmp.new_cipher->algorithm_auth & |
334 | (SSL_aNULL | SSL_aSRP | SSL_aPSK))) { | |
0f113f3e MC |
335 | ret = ssl3_get_server_certificate(s); |
336 | if (ret <= 0) | |
337 | goto end; | |
e481f9b9 | 338 | |
0f113f3e MC |
339 | if (s->tlsext_status_expected) |
340 | s->state = SSL3_ST_CR_CERT_STATUS_A; | |
341 | else | |
342 | s->state = SSL3_ST_CR_KEY_EXCH_A; | |
343 | } else { | |
344 | skip = 1; | |
345 | s->state = SSL3_ST_CR_KEY_EXCH_A; | |
346 | } | |
0f113f3e | 347 | |
0f113f3e MC |
348 | s->init_num = 0; |
349 | break; | |
350 | ||
351 | case SSL3_ST_CR_KEY_EXCH_A: | |
352 | case SSL3_ST_CR_KEY_EXCH_B: | |
353 | ret = ssl3_get_key_exchange(s); | |
354 | if (ret <= 0) | |
355 | goto end; | |
356 | s->state = SSL3_ST_CR_CERT_REQ_A; | |
357 | s->init_num = 0; | |
358 | ||
359 | /* | |
360 | * at this point we check that we have the required stuff from | |
361 | * the server | |
362 | */ | |
363 | if (!ssl3_check_cert_and_algorithm(s)) { | |
364 | ret = -1; | |
cc273a93 | 365 | s->state = SSL_ST_ERR; |
0f113f3e MC |
366 | goto end; |
367 | } | |
368 | break; | |
369 | ||
370 | case SSL3_ST_CR_CERT_REQ_A: | |
371 | case SSL3_ST_CR_CERT_REQ_B: | |
372 | ret = ssl3_get_certificate_request(s); | |
373 | if (ret <= 0) | |
374 | goto end; | |
375 | s->state = SSL3_ST_CR_SRVR_DONE_A; | |
376 | s->init_num = 0; | |
377 | break; | |
378 | ||
379 | case SSL3_ST_CR_SRVR_DONE_A: | |
380 | case SSL3_ST_CR_SRVR_DONE_B: | |
381 | ret = ssl3_get_server_done(s); | |
382 | if (ret <= 0) | |
383 | goto end; | |
edc032b5 | 384 | #ifndef OPENSSL_NO_SRP |
0f113f3e MC |
385 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { |
386 | if ((ret = SRP_Calc_A_param(s)) <= 0) { | |
387 | SSLerr(SSL_F_SSL3_CONNECT, SSL_R_SRP_A_CALC); | |
388 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
cc273a93 | 389 | s->state = SSL_ST_ERR; |
0f113f3e MC |
390 | goto end; |
391 | } | |
392 | } | |
393 | #endif | |
394 | if (s->s3->tmp.cert_req) | |
395 | s->state = SSL3_ST_CW_CERT_A; | |
396 | else | |
397 | s->state = SSL3_ST_CW_KEY_EXCH_A; | |
398 | s->init_num = 0; | |
399 | ||
400 | break; | |
401 | ||
402 | case SSL3_ST_CW_CERT_A: | |
403 | case SSL3_ST_CW_CERT_B: | |
404 | case SSL3_ST_CW_CERT_C: | |
405 | case SSL3_ST_CW_CERT_D: | |
406 | ret = ssl3_send_client_certificate(s); | |
407 | if (ret <= 0) | |
408 | goto end; | |
409 | s->state = SSL3_ST_CW_KEY_EXCH_A; | |
410 | s->init_num = 0; | |
411 | break; | |
412 | ||
413 | case SSL3_ST_CW_KEY_EXCH_A: | |
414 | case SSL3_ST_CW_KEY_EXCH_B: | |
415 | ret = ssl3_send_client_key_exchange(s); | |
416 | if (ret <= 0) | |
417 | goto end; | |
418 | /* | |
419 | * EAY EAY EAY need to check for DH fix cert sent back | |
420 | */ | |
421 | /* | |
422 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
423 | * sent, but no verify packet is sent | |
424 | */ | |
425 | /* | |
426 | * XXX: For now, we do not support client authentication in ECDH | |
427 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
428 | * need to skip the certificate verify message when client's | |
429 | * ECDH public key is sent inside the client certificate. | |
430 | */ | |
431 | if (s->s3->tmp.cert_req == 1) { | |
432 | s->state = SSL3_ST_CW_CERT_VRFY_A; | |
433 | } else { | |
434 | s->state = SSL3_ST_CW_CHANGE_A; | |
435 | } | |
436 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
437 | s->state = SSL3_ST_CW_CHANGE_A; | |
438 | } | |
439 | ||
440 | s->init_num = 0; | |
441 | break; | |
442 | ||
443 | case SSL3_ST_CW_CERT_VRFY_A: | |
444 | case SSL3_ST_CW_CERT_VRFY_B: | |
445 | ret = ssl3_send_client_verify(s); | |
446 | if (ret <= 0) | |
447 | goto end; | |
448 | s->state = SSL3_ST_CW_CHANGE_A; | |
449 | s->init_num = 0; | |
450 | break; | |
451 | ||
452 | case SSL3_ST_CW_CHANGE_A: | |
453 | case SSL3_ST_CW_CHANGE_B: | |
454 | ret = ssl3_send_change_cipher_spec(s, | |
455 | SSL3_ST_CW_CHANGE_A, | |
456 | SSL3_ST_CW_CHANGE_B); | |
457 | if (ret <= 0) | |
458 | goto end; | |
ee2ffc27 | 459 | |
e481f9b9 | 460 | #if defined(OPENSSL_NO_NEXTPROTONEG) |
0f113f3e | 461 | s->state = SSL3_ST_CW_FINISHED_A; |
ee2ffc27 | 462 | #else |
0f113f3e MC |
463 | if (s->s3->next_proto_neg_seen) |
464 | s->state = SSL3_ST_CW_NEXT_PROTO_A; | |
465 | else | |
466 | s->state = SSL3_ST_CW_FINISHED_A; | |
ee2ffc27 | 467 | #endif |
0f113f3e | 468 | s->init_num = 0; |
d02b48c6 | 469 | |
0f113f3e | 470 | s->session->cipher = s->s3->tmp.new_cipher; |
09b6c2ef | 471 | #ifdef OPENSSL_NO_COMP |
0f113f3e | 472 | s->session->compress_meth = 0; |
09b6c2ef | 473 | #else |
0f113f3e MC |
474 | if (s->s3->tmp.new_compression == NULL) |
475 | s->session->compress_meth = 0; | |
476 | else | |
477 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
09b6c2ef | 478 | #endif |
0f113f3e MC |
479 | if (!s->method->ssl3_enc->setup_key_block(s)) { |
480 | ret = -1; | |
cc273a93 | 481 | s->state = SSL_ST_ERR; |
0f113f3e MC |
482 | goto end; |
483 | } | |
d02b48c6 | 484 | |
0f113f3e MC |
485 | if (!s->method->ssl3_enc->change_cipher_state(s, |
486 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
487 | { | |
488 | ret = -1; | |
cc273a93 | 489 | s->state = SSL_ST_ERR; |
0f113f3e MC |
490 | goto end; |
491 | } | |
d02b48c6 | 492 | |
0f113f3e | 493 | break; |
d02b48c6 | 494 | |
e481f9b9 | 495 | #if !defined(OPENSSL_NO_NEXTPROTONEG) |
0f113f3e MC |
496 | case SSL3_ST_CW_NEXT_PROTO_A: |
497 | case SSL3_ST_CW_NEXT_PROTO_B: | |
498 | ret = ssl3_send_next_proto(s); | |
499 | if (ret <= 0) | |
500 | goto end; | |
501 | s->state = SSL3_ST_CW_FINISHED_A; | |
502 | break; | |
503 | #endif | |
504 | ||
505 | case SSL3_ST_CW_FINISHED_A: | |
506 | case SSL3_ST_CW_FINISHED_B: | |
507 | ret = ssl3_send_finished(s, | |
508 | SSL3_ST_CW_FINISHED_A, | |
509 | SSL3_ST_CW_FINISHED_B, | |
510 | s->method-> | |
511 | ssl3_enc->client_finished_label, | |
512 | s->method-> | |
513 | ssl3_enc->client_finished_label_len); | |
514 | if (ret <= 0) | |
515 | goto end; | |
516 | s->state = SSL3_ST_CW_FLUSH; | |
517 | ||
0f113f3e MC |
518 | if (s->hit) { |
519 | s->s3->tmp.next_state = SSL_ST_OK; | |
0f113f3e | 520 | } else { |
0f113f3e MC |
521 | /* |
522 | * Allow NewSessionTicket if ticket expected | |
523 | */ | |
524 | if (s->tlsext_ticket_expected) | |
525 | s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A; | |
526 | else | |
657da85e | 527 | s->s3->tmp.next_state = SSL3_ST_CR_CHANGE_A; |
0f113f3e MC |
528 | } |
529 | s->init_num = 0; | |
530 | break; | |
d02b48c6 | 531 | |
0f113f3e MC |
532 | case SSL3_ST_CR_SESSION_TICKET_A: |
533 | case SSL3_ST_CR_SESSION_TICKET_B: | |
534 | ret = ssl3_get_new_session_ticket(s); | |
535 | if (ret <= 0) | |
536 | goto end; | |
657da85e | 537 | s->state = SSL3_ST_CR_CHANGE_A; |
0f113f3e MC |
538 | s->init_num = 0; |
539 | break; | |
540 | ||
541 | case SSL3_ST_CR_CERT_STATUS_A: | |
542 | case SSL3_ST_CR_CERT_STATUS_B: | |
543 | ret = ssl3_get_cert_status(s); | |
544 | if (ret <= 0) | |
545 | goto end; | |
546 | s->state = SSL3_ST_CR_KEY_EXCH_A; | |
547 | s->init_num = 0; | |
548 | break; | |
0f113f3e | 549 | |
657da85e MC |
550 | case SSL3_ST_CR_CHANGE_A: |
551 | case SSL3_ST_CR_CHANGE_B: | |
552 | ret = ssl3_get_change_cipher_spec(s, SSL3_ST_CR_CHANGE_A, | |
553 | SSL3_ST_CR_CHANGE_B); | |
554 | if (ret <= 0) | |
555 | goto end; | |
556 | ||
557 | s->state = SSL3_ST_CR_FINISHED_A; | |
558 | s->init_num = 0; | |
559 | break; | |
560 | ||
0f113f3e MC |
561 | case SSL3_ST_CR_FINISHED_A: |
562 | case SSL3_ST_CR_FINISHED_B: | |
0f113f3e MC |
563 | ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A, |
564 | SSL3_ST_CR_FINISHED_B); | |
565 | if (ret <= 0) | |
566 | goto end; | |
567 | ||
568 | if (s->hit) | |
569 | s->state = SSL3_ST_CW_CHANGE_A; | |
570 | else | |
571 | s->state = SSL_ST_OK; | |
572 | s->init_num = 0; | |
573 | break; | |
574 | ||
575 | case SSL3_ST_CW_FLUSH: | |
576 | s->rwstate = SSL_WRITING; | |
577 | if (BIO_flush(s->wbio) <= 0) { | |
578 | ret = -1; | |
579 | goto end; | |
580 | } | |
581 | s->rwstate = SSL_NOTHING; | |
582 | s->state = s->s3->tmp.next_state; | |
583 | break; | |
584 | ||
585 | case SSL_ST_OK: | |
586 | /* clean a few things up */ | |
587 | ssl3_cleanup_key_block(s); | |
25aaa98a RS |
588 | BUF_MEM_free(s->init_buf); |
589 | s->init_buf = NULL; | |
0f113f3e | 590 | |
57787ac8 MC |
591 | /* remove the buffering */ |
592 | ssl_free_wbio_buffer(s); | |
0f113f3e MC |
593 | |
594 | s->init_num = 0; | |
595 | s->renegotiate = 0; | |
596 | s->new_session = 0; | |
597 | ||
598 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); | |
599 | if (s->hit) | |
600 | s->ctx->stats.sess_hit++; | |
601 | ||
602 | ret = 1; | |
603 | /* s->server=0; */ | |
604 | s->handshake_func = ssl3_connect; | |
605 | s->ctx->stats.sess_connect_good++; | |
606 | ||
607 | if (cb != NULL) | |
608 | cb(s, SSL_CB_HANDSHAKE_DONE, 1); | |
609 | ||
610 | goto end; | |
611 | /* break; */ | |
612 | ||
cc273a93 | 613 | case SSL_ST_ERR: |
0f113f3e MC |
614 | default: |
615 | SSLerr(SSL_F_SSL3_CONNECT, SSL_R_UNKNOWN_STATE); | |
616 | ret = -1; | |
617 | goto end; | |
618 | /* break; */ | |
619 | } | |
620 | ||
621 | /* did we do anything */ | |
622 | if (!s->s3->tmp.reuse_message && !skip) { | |
623 | if (s->debug) { | |
624 | if ((ret = BIO_flush(s->wbio)) <= 0) | |
625 | goto end; | |
626 | } | |
627 | ||
628 | if ((cb != NULL) && (s->state != state)) { | |
629 | new_state = s->state; | |
630 | s->state = state; | |
631 | cb(s, SSL_CB_CONNECT_LOOP, 1); | |
632 | s->state = new_state; | |
633 | } | |
634 | } | |
635 | skip = 0; | |
636 | } | |
637 | end: | |
638 | s->in_handshake--; | |
25aaa98a | 639 | BUF_MEM_free(buf); |
0f113f3e MC |
640 | if (cb != NULL) |
641 | cb(s, SSL_CB_CONNECT_EXIT, ret); | |
642 | return (ret); | |
643 | } | |
d02b48c6 | 644 | |
d45ba43d MC |
645 | /* |
646 | * Work out what version we should be using for the initial ClientHello if | |
647 | * the version is currently set to (D)TLS_ANY_VERSION. | |
648 | * Returns 1 on success | |
649 | * Returns 0 on error | |
650 | */ | |
651 | static int ssl_set_version(SSL *s) | |
652 | { | |
653 | unsigned long mask, options = s->options; | |
654 | ||
655 | if (s->method->version == TLS_ANY_VERSION) { | |
656 | /* | |
657 | * SSL_OP_NO_X disables all protocols above X *if* there are | |
658 | * some protocols below X enabled. This is required in order | |
659 | * to maintain "version capability" vector contiguous. So | |
660 | * that if application wants to disable TLS1.0 in favour of | |
661 | * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the | |
662 | * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3. | |
663 | */ | |
664 | mask = SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1 | |
665 | #if !defined(OPENSSL_NO_SSL3) | |
666 | | SSL_OP_NO_SSLv3 | |
667 | #endif | |
668 | ; | |
669 | #if !defined(OPENSSL_NO_TLS1_2_CLIENT) | |
670 | if (options & SSL_OP_NO_TLSv1_2) { | |
671 | if ((options & mask) != mask) { | |
672 | s->version = TLS1_1_VERSION; | |
673 | } else { | |
674 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE); | |
675 | return 0; | |
676 | } | |
677 | } else { | |
678 | s->version = TLS1_2_VERSION; | |
679 | } | |
680 | #else | |
681 | if ((options & mask) == mask) { | |
682 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE); | |
683 | return 0; | |
684 | } | |
685 | s->version = TLS1_1_VERSION; | |
686 | #endif | |
687 | ||
688 | mask &= ~SSL_OP_NO_TLSv1_1; | |
689 | if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask) | |
690 | s->version = TLS1_VERSION; | |
691 | mask &= ~SSL_OP_NO_TLSv1; | |
692 | #if !defined(OPENSSL_NO_SSL3) | |
693 | if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask) | |
694 | s->version = SSL3_VERSION; | |
695 | #endif | |
696 | ||
697 | if (s->version != TLS1_2_VERSION && tls1_suiteb(s)) { | |
698 | SSLerr(SSL_F_SSL_SET_VERSION, | |
699 | SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE); | |
700 | return 0; | |
701 | } | |
702 | ||
703 | if (s->version == SSL3_VERSION && FIPS_mode()) { | |
704 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); | |
705 | return 0; | |
706 | } | |
707 | ||
708 | } else if (s->method->version == DTLS_ANY_VERSION) { | |
709 | /* Determine which DTLS version to use */ | |
710 | /* If DTLS 1.2 disabled correct the version number */ | |
711 | if (options & SSL_OP_NO_DTLSv1_2) { | |
712 | if (tls1_suiteb(s)) { | |
713 | SSLerr(SSL_F_SSL_SET_VERSION, | |
714 | SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE); | |
715 | return 0; | |
716 | } | |
717 | /* | |
718 | * Disabling all versions is silly: return an error. | |
719 | */ | |
720 | if (options & SSL_OP_NO_DTLSv1) { | |
721 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_WRONG_SSL_VERSION); | |
722 | return 0; | |
723 | } | |
724 | /* | |
725 | * Update method so we don't use any DTLS 1.2 features. | |
726 | */ | |
727 | s->method = DTLSv1_client_method(); | |
728 | s->version = DTLS1_VERSION; | |
729 | } else { | |
730 | /* | |
731 | * We only support one version: update method | |
732 | */ | |
733 | if (options & SSL_OP_NO_DTLSv1) | |
734 | s->method = DTLSv1_2_client_method(); | |
735 | s->version = DTLS1_2_VERSION; | |
736 | } | |
737 | } | |
738 | ||
739 | s->client_version = s->version; | |
740 | ||
741 | return 1; | |
742 | } | |
743 | ||
36d16f8e | 744 | int ssl3_client_hello(SSL *s) |
0f113f3e MC |
745 | { |
746 | unsigned char *buf; | |
747 | unsigned char *p, *d; | |
748 | int i; | |
749 | unsigned long l; | |
750 | int al = 0; | |
09b6c2ef | 751 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
752 | int j; |
753 | SSL_COMP *comp; | |
754 | #endif | |
755 | ||
756 | buf = (unsigned char *)s->init_buf->data; | |
757 | if (s->state == SSL3_ST_CW_CLNT_HELLO_A) { | |
758 | SSL_SESSION *sess = s->session; | |
13c9bb3e | 759 | |
d45ba43d MC |
760 | /* Work out what SSL/TLS/DTLS version to use */ |
761 | if (ssl_set_version(s) == 0) | |
762 | goto err; | |
13c9bb3e MC |
763 | |
764 | if ((sess == NULL) || (sess->ssl_version != s->version) || | |
13c9bb3e MC |
765 | /* |
766 | * In the case of EAP-FAST, we can have a pre-shared | |
767 | * "ticket" without a session ID. | |
768 | */ | |
769 | (!sess->session_id_length && !sess->tlsext_tick) || | |
13c9bb3e MC |
770 | (sess->not_resumable)) { |
771 | if (!ssl_get_new_session(s, 0)) | |
772 | goto err; | |
773 | } | |
0f113f3e MC |
774 | /* else use the pre-loaded session */ |
775 | ||
776 | p = s->s3->client_random; | |
777 | ||
778 | /* | |
779 | * for DTLS if client_random is initialized, reuse it, we are | |
780 | * required to use same upon reply to HelloVerify | |
781 | */ | |
782 | if (SSL_IS_DTLS(s)) { | |
783 | size_t idx; | |
784 | i = 1; | |
785 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
786 | if (p[idx]) { | |
787 | i = 0; | |
788 | break; | |
789 | } | |
790 | } | |
791 | } else | |
792 | i = 1; | |
793 | ||
e1b568dd MC |
794 | if (i && ssl_fill_hello_random(s, 0, p, |
795 | sizeof(s->s3->client_random)) <= 0) | |
796 | goto err; | |
0f113f3e MC |
797 | |
798 | /* Do the message type and length last */ | |
799 | d = p = ssl_handshake_start(s); | |
800 | ||
35a1cc90 MC |
801 | /*- |
802 | * version indicates the negotiated version: for example from | |
803 | * an SSLv2/v3 compatible client hello). The client_version | |
804 | * field is the maximum version we permit and it is also | |
805 | * used in RSA encrypted premaster secrets. Some servers can | |
806 | * choke if we initially report a higher version then | |
807 | * renegotiate to a lower one in the premaster secret. This | |
808 | * didn't happen with TLS 1.0 as most servers supported it | |
809 | * but it can with TLS 1.1 or later if the server only supports | |
810 | * 1.0. | |
811 | * | |
812 | * Possible scenario with previous logic: | |
813 | * 1. Client hello indicates TLS 1.2 | |
814 | * 2. Server hello says TLS 1.0 | |
815 | * 3. RSA encrypted premaster secret uses 1.2. | |
816 | * 4. Handhaked proceeds using TLS 1.0. | |
817 | * 5. Server sends hello request to renegotiate. | |
818 | * 6. Client hello indicates TLS v1.0 as we now | |
819 | * know that is maximum server supports. | |
820 | * 7. Server chokes on RSA encrypted premaster secret | |
821 | * containing version 1.0. | |
822 | * | |
823 | * For interoperability it should be OK to always use the | |
824 | * maximum version we support in client hello and then rely | |
825 | * on the checking of version to ensure the servers isn't | |
826 | * being inconsistent: for example initially negotiating with | |
827 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
828 | * client_version in client hello and not resetting it to | |
829 | * the negotiated version. | |
830 | */ | |
0f113f3e MC |
831 | *(p++) = s->client_version >> 8; |
832 | *(p++) = s->client_version & 0xff; | |
0f113f3e MC |
833 | |
834 | /* Random stuff */ | |
835 | memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); | |
836 | p += SSL3_RANDOM_SIZE; | |
837 | ||
838 | /* Session ID */ | |
839 | if (s->new_session) | |
840 | i = 0; | |
841 | else | |
842 | i = s->session->session_id_length; | |
843 | *(p++) = i; | |
844 | if (i != 0) { | |
845 | if (i > (int)sizeof(s->session->session_id)) { | |
846 | SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
847 | goto err; | |
848 | } | |
849 | memcpy(p, s->session->session_id, i); | |
850 | p += i; | |
851 | } | |
852 | ||
853 | /* cookie stuff for DTLS */ | |
854 | if (SSL_IS_DTLS(s)) { | |
855 | if (s->d1->cookie_len > sizeof(s->d1->cookie)) { | |
856 | SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
857 | goto err; | |
858 | } | |
859 | *(p++) = s->d1->cookie_len; | |
860 | memcpy(p, s->d1->cookie, s->d1->cookie_len); | |
861 | p += s->d1->cookie_len; | |
862 | } | |
863 | ||
864 | /* Ciphers supported */ | |
865 | i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]), 0); | |
866 | if (i == 0) { | |
867 | SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); | |
868 | goto err; | |
869 | } | |
800e1cd9 | 870 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
0f113f3e MC |
871 | /* |
872 | * Some servers hang if client hello > 256 bytes as hack workaround | |
873 | * chop number of supported ciphers to keep it well below this if we | |
874 | * use TLS v1.2 | |
875 | */ | |
876 | if (TLS1_get_version(s) >= TLS1_2_VERSION | |
877 | && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) | |
878 | i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
879 | #endif | |
880 | s2n(i, p); | |
881 | p += i; | |
882 | ||
883 | /* COMPRESSION */ | |
09b6c2ef | 884 | #ifdef OPENSSL_NO_COMP |
0f113f3e | 885 | *(p++) = 1; |
09b6c2ef | 886 | #else |
566dda07 | 887 | |
0f113f3e MC |
888 | if (!ssl_allow_compression(s) || !s->ctx->comp_methods) |
889 | j = 0; | |
890 | else | |
891 | j = sk_SSL_COMP_num(s->ctx->comp_methods); | |
892 | *(p++) = 1 + j; | |
893 | for (i = 0; i < j; i++) { | |
894 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
895 | *(p++) = comp->id; | |
896 | } | |
09b6c2ef | 897 | #endif |
0f113f3e | 898 | *(p++) = 0; /* Add the NULL method */ |
761772d7 | 899 | |
0f113f3e MC |
900 | /* TLS extensions */ |
901 | if (ssl_prepare_clienthello_tlsext(s) <= 0) { | |
902 | SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); | |
903 | goto err; | |
904 | } | |
905 | if ((p = | |
906 | ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH, | |
907 | &al)) == NULL) { | |
908 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
909 | SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
910 | goto err; | |
911 | } | |
0f113f3e MC |
912 | |
913 | l = p - d; | |
61986d32 | 914 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) { |
77d514c5 MC |
915 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
916 | SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
917 | goto err; | |
918 | } | |
0f113f3e MC |
919 | s->state = SSL3_ST_CW_CLNT_HELLO_B; |
920 | } | |
921 | ||
922 | /* SSL3_ST_CW_CLNT_HELLO_B */ | |
923 | return ssl_do_write(s); | |
924 | err: | |
cc273a93 | 925 | s->state = SSL_ST_ERR; |
0f113f3e MC |
926 | return (-1); |
927 | } | |
d02b48c6 | 928 | |
36d16f8e | 929 | int ssl3_get_server_hello(SSL *s) |
0f113f3e MC |
930 | { |
931 | STACK_OF(SSL_CIPHER) *sk; | |
932 | const SSL_CIPHER *c; | |
0f113f3e MC |
933 | unsigned char *p, *d; |
934 | int i, al = SSL_AD_INTERNAL_ERROR, ok; | |
935 | unsigned int j; | |
936 | long n; | |
09b6c2ef | 937 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
938 | SSL_COMP *comp; |
939 | #endif | |
940 | /* | |
941 | * Hello verify request and/or server hello version may not match so set | |
942 | * first packet if we're negotiating version. | |
943 | */ | |
81fc390f | 944 | s->first_packet = 1; |
0f113f3e MC |
945 | |
946 | n = s->method->ssl_get_message(s, | |
947 | SSL3_ST_CR_SRVR_HELLO_A, | |
948 | SSL3_ST_CR_SRVR_HELLO_B, -1, 20000, &ok); | |
949 | ||
950 | if (!ok) | |
951 | return ((int)n); | |
952 | ||
81fc390f | 953 | s->first_packet = 0; |
0f113f3e | 954 | if (SSL_IS_DTLS(s)) { |
0f113f3e MC |
955 | if (s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) { |
956 | if (s->d1->send_cookie == 0) { | |
957 | s->s3->tmp.reuse_message = 1; | |
958 | return 1; | |
959 | } else { /* already sent a cookie */ | |
960 | ||
961 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
962 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE); | |
963 | goto f_err; | |
964 | } | |
965 | } | |
966 | } | |
967 | ||
968 | if (s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) { | |
969 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
970 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE); | |
971 | goto f_err; | |
972 | } | |
973 | ||
974 | d = p = (unsigned char *)s->init_msg; | |
13c9bb3e MC |
975 | |
976 | if (s->method->version == TLS_ANY_VERSION) { | |
977 | int sversion = (p[0] << 8) | p[1]; | |
978 | ||
979 | #if TLS_MAX_VERSION != TLS1_2_VERSION | |
980 | #error Code needs updating for new TLS version | |
981 | #endif | |
982 | #ifndef OPENSSL_NO_SSL3 | |
983 | if ((sversion == SSL3_VERSION) && !(s->options & SSL_OP_NO_SSLv3)) { | |
984 | if (FIPS_mode()) { | |
985 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, | |
986 | SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); | |
d45ba43d MC |
987 | al = SSL_AD_PROTOCOL_VERSION; |
988 | goto f_err; | |
13c9bb3e MC |
989 | } |
990 | s->method = SSLv3_client_method(); | |
991 | } else | |
992 | #endif | |
993 | if ((sversion == TLS1_VERSION) && !(s->options & SSL_OP_NO_TLSv1)) { | |
994 | s->method = TLSv1_client_method(); | |
995 | } else if ((sversion == TLS1_1_VERSION) && | |
996 | !(s->options & SSL_OP_NO_TLSv1_1)) { | |
997 | s->method = TLSv1_1_client_method(); | |
998 | } else if ((sversion == TLS1_2_VERSION) && | |
999 | !(s->options & SSL_OP_NO_TLSv1_2)) { | |
1000 | s->method = TLSv1_2_client_method(); | |
1001 | } else { | |
1002 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); | |
d45ba43d MC |
1003 | al = SSL_AD_PROTOCOL_VERSION; |
1004 | goto f_err; | |
13c9bb3e MC |
1005 | } |
1006 | s->session->ssl_version = s->version = s->method->version; | |
1007 | ||
1008 | if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) { | |
1009 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_VERSION_TOO_LOW); | |
d45ba43d MC |
1010 | al = SSL_AD_PROTOCOL_VERSION; |
1011 | goto f_err; | |
13c9bb3e MC |
1012 | } |
1013 | } else if (s->method->version == DTLS_ANY_VERSION) { | |
0f113f3e MC |
1014 | /* Work out correct protocol version to use */ |
1015 | int hversion = (p[0] << 8) | p[1]; | |
1016 | int options = s->options; | |
1017 | if (hversion == DTLS1_2_VERSION && !(options & SSL_OP_NO_DTLSv1_2)) | |
1018 | s->method = DTLSv1_2_client_method(); | |
1019 | else if (tls1_suiteb(s)) { | |
1020 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, | |
1021 | SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE); | |
1022 | s->version = hversion; | |
1023 | al = SSL_AD_PROTOCOL_VERSION; | |
1024 | goto f_err; | |
1025 | } else if (hversion == DTLS1_VERSION && !(options & SSL_OP_NO_DTLSv1)) | |
1026 | s->method = DTLSv1_client_method(); | |
1027 | else { | |
1028 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); | |
1029 | s->version = hversion; | |
1030 | al = SSL_AD_PROTOCOL_VERSION; | |
1031 | goto f_err; | |
1032 | } | |
7322abf5 | 1033 | s->session->ssl_version = s->version = s->method->version; |
13c9bb3e | 1034 | } else if ((p[0] != (s->version >> 8)) || (p[1] != (s->version & 0xff))) { |
0f113f3e MC |
1035 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); |
1036 | s->version = (s->version & 0xff00) | p[1]; | |
1037 | al = SSL_AD_PROTOCOL_VERSION; | |
1038 | goto f_err; | |
1039 | } | |
1040 | p += 2; | |
1041 | ||
1042 | /* load the server hello data */ | |
1043 | /* load the server random */ | |
1044 | memcpy(s->s3->server_random, p, SSL3_RANDOM_SIZE); | |
1045 | p += SSL3_RANDOM_SIZE; | |
1046 | ||
1047 | s->hit = 0; | |
1048 | ||
1049 | /* get the session-id */ | |
1050 | j = *(p++); | |
1051 | ||
1052 | if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) { | |
1053 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1054 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
1055 | goto f_err; | |
1056 | } | |
e481f9b9 | 1057 | |
0f113f3e | 1058 | /* |
6e3d0153 EK |
1059 | * Check if we can resume the session based on external pre-shared secret. |
1060 | * EAP-FAST (RFC 4851) supports two types of session resumption. | |
1061 | * Resumption based on server-side state works with session IDs. | |
1062 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
1063 | * works by overriding the SessionTicket extension at the application | |
1064 | * layer, and does not send a session ID. (We do not know whether EAP-FAST | |
1065 | * servers would honour the session ID.) Therefore, the session ID alone | |
1066 | * is not a reliable indicator of session resumption, so we first check if | |
1067 | * we can resume, and later peek at the next handshake message to see if the | |
1068 | * server wants to resume. | |
0f113f3e | 1069 | */ |
6e3d0153 EK |
1070 | if (s->version >= TLS1_VERSION && s->tls_session_secret_cb && |
1071 | s->session->tlsext_tick) { | |
0f113f3e MC |
1072 | SSL_CIPHER *pref_cipher = NULL; |
1073 | s->session->master_key_length = sizeof(s->session->master_key); | |
1074 | if (s->tls_session_secret_cb(s, s->session->master_key, | |
1075 | &s->session->master_key_length, | |
1076 | NULL, &pref_cipher, | |
1077 | s->tls_session_secret_cb_arg)) { | |
1078 | s->session->cipher = pref_cipher ? | |
1079 | pref_cipher : ssl_get_cipher_by_char(s, p + j); | |
6e3d0153 EK |
1080 | } else { |
1081 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1082 | al = SSL_AD_INTERNAL_ERROR; | |
1083 | goto f_err; | |
0f113f3e MC |
1084 | } |
1085 | } | |
0f113f3e | 1086 | |
6e3d0153 | 1087 | if (j != 0 && j == s->session->session_id_length |
0f113f3e MC |
1088 | && memcmp(p, s->session->session_id, j) == 0) { |
1089 | if (s->sid_ctx_length != s->session->sid_ctx_length | |
1090 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { | |
1091 | /* actually a client application bug */ | |
1092 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1093 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, | |
1094 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); | |
1095 | goto f_err; | |
1096 | } | |
1097 | s->hit = 1; | |
6e3d0153 | 1098 | } else { |
0f113f3e | 1099 | /* |
6e3d0153 EK |
1100 | * If we were trying for session-id reuse but the server |
1101 | * didn't echo the ID, make a new SSL_SESSION. | |
1102 | * In the case of EAP-FAST and PAC, we do not send a session ID, | |
1103 | * so the PAC-based session secret is always preserved. It'll be | |
1104 | * overwritten if the server refuses resumption. | |
0f113f3e MC |
1105 | */ |
1106 | if (s->session->session_id_length > 0) { | |
1107 | if (!ssl_get_new_session(s, 0)) { | |
1108 | goto f_err; | |
1109 | } | |
1110 | } | |
1111 | s->session->session_id_length = j; | |
1112 | memcpy(s->session->session_id, p, j); /* j could be 0 */ | |
1113 | } | |
1114 | p += j; | |
1115 | c = ssl_get_cipher_by_char(s, p); | |
1116 | if (c == NULL) { | |
1117 | /* unknown cipher */ | |
1118 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1119 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); | |
1120 | goto f_err; | |
1121 | } | |
1122 | /* Set version disabled mask now we know version */ | |
1123 | if (!SSL_USE_TLS1_2_CIPHERS(s)) | |
4d69f9e6 | 1124 | s->s3->tmp.mask_ssl = SSL_TLSV1_2; |
0f113f3e | 1125 | else |
4d69f9e6 | 1126 | s->s3->tmp.mask_ssl = 0; |
0f113f3e MC |
1127 | /* |
1128 | * If it is a disabled cipher we didn't send it in client hello, so | |
1129 | * return an error. | |
1130 | */ | |
1131 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
1132 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1133 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); | |
1134 | goto f_err; | |
1135 | } | |
1136 | p += ssl_put_cipher_by_char(s, NULL, NULL); | |
1137 | ||
1138 | sk = ssl_get_ciphers_by_id(s); | |
1139 | i = sk_SSL_CIPHER_find(sk, c); | |
1140 | if (i < 0) { | |
1141 | /* we did not say we would use this cipher */ | |
1142 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1143 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); | |
1144 | goto f_err; | |
1145 | } | |
1146 | ||
1147 | /* | |
1148 | * Depending on the session caching (internal/external), the cipher | |
1149 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1150 | * set and use it for comparison. | |
1151 | */ | |
1152 | if (s->session->cipher) | |
1153 | s->session->cipher_id = s->session->cipher->id; | |
1154 | if (s->hit && (s->session->cipher_id != c->id)) { | |
9e9858d1 RS |
1155 | al = SSL_AD_ILLEGAL_PARAMETER; |
1156 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, | |
1157 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); | |
1158 | goto f_err; | |
0f113f3e MC |
1159 | } |
1160 | s->s3->tmp.new_cipher = c; | |
1161 | /* | |
1162 | * Don't digest cached records if no sigalgs: we may need them for client | |
1163 | * authentication. | |
1164 | */ | |
124037fd | 1165 | if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s, 0)) |
0f113f3e MC |
1166 | goto f_err; |
1167 | /* lets get the compression algorithm */ | |
1168 | /* COMPRESSION */ | |
09b6c2ef | 1169 | #ifdef OPENSSL_NO_COMP |
0f113f3e MC |
1170 | if (*(p++) != 0) { |
1171 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1172 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, | |
1173 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); | |
1174 | goto f_err; | |
1175 | } | |
1176 | /* | |
1177 | * If compression is disabled we'd better not try to resume a session | |
1178 | * using compression. | |
1179 | */ | |
1180 | if (s->session->compress_meth != 0) { | |
1181 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); | |
1182 | goto f_err; | |
1183 | } | |
09b6c2ef | 1184 | #else |
0f113f3e MC |
1185 | j = *(p++); |
1186 | if (s->hit && j != s->session->compress_meth) { | |
1187 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1188 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, | |
1189 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); | |
1190 | goto f_err; | |
1191 | } | |
1192 | if (j == 0) | |
1193 | comp = NULL; | |
1194 | else if (!ssl_allow_compression(s)) { | |
1195 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1196 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); | |
1197 | goto f_err; | |
1198 | } else | |
1199 | comp = ssl3_comp_find(s->ctx->comp_methods, j); | |
1200 | ||
1201 | if ((j != 0) && (comp == NULL)) { | |
1202 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1203 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, | |
1204 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); | |
1205 | goto f_err; | |
1206 | } else { | |
1207 | s->s3->tmp.new_compression = comp; | |
1208 | } | |
09b6c2ef | 1209 | #endif |
761772d7 | 1210 | |
0f113f3e MC |
1211 | /* TLS extensions */ |
1212 | if (!ssl_parse_serverhello_tlsext(s, &p, d, n)) { | |
1213 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_PARSE_TLSEXT); | |
1214 | goto err; | |
1215 | } | |
0f113f3e MC |
1216 | |
1217 | if (p != (d + n)) { | |
1218 | /* wrong packet length */ | |
1219 | al = SSL_AD_DECODE_ERROR; | |
1220 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH); | |
1221 | goto f_err; | |
1222 | } | |
1223 | ||
1224 | return (1); | |
1225 | f_err: | |
1226 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1227 | err: | |
cc273a93 | 1228 | s->state = SSL_ST_ERR; |
0f113f3e MC |
1229 | return (-1); |
1230 | } | |
d02b48c6 | 1231 | |
36d16f8e | 1232 | int ssl3_get_server_certificate(SSL *s) |
0f113f3e | 1233 | { |
55a9a16f | 1234 | int al, i, ok, ret = -1, exp_idx; |
df758a85 | 1235 | unsigned long n, cert_list_len, cert_len; |
0f113f3e | 1236 | X509 *x = NULL; |
df758a85 | 1237 | unsigned char *certstart, *certbytes; |
0f113f3e | 1238 | STACK_OF(X509) *sk = NULL; |
0f113f3e | 1239 | EVP_PKEY *pkey = NULL; |
df758a85 | 1240 | PACKET pkt; |
0f113f3e MC |
1241 | |
1242 | n = s->method->ssl_get_message(s, | |
1243 | SSL3_ST_CR_CERT_A, | |
1244 | SSL3_ST_CR_CERT_B, | |
1245 | -1, s->max_cert_list, &ok); | |
1246 | ||
1247 | if (!ok) | |
1248 | return ((int)n); | |
1249 | ||
55a9a16f | 1250 | if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) { |
0f113f3e MC |
1251 | s->s3->tmp.reuse_message = 1; |
1252 | return (1); | |
1253 | } | |
1254 | ||
1255 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) { | |
1256 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1257 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_BAD_MESSAGE_TYPE); | |
1258 | goto f_err; | |
1259 | } | |
df758a85 MC |
1260 | |
1261 | if (!PACKET_buf_init(&pkt, s->init_msg, n)) { | |
1262 | al = SSL_AD_INTERNAL_ERROR; | |
1263 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
1264 | goto f_err; | |
1265 | } | |
0f113f3e MC |
1266 | |
1267 | if ((sk = sk_X509_new_null()) == NULL) { | |
1268 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); | |
cc273a93 | 1269 | goto err; |
0f113f3e MC |
1270 | } |
1271 | ||
df758a85 MC |
1272 | if (!PACKET_get_net_3(&pkt, &cert_list_len) |
1273 | || PACKET_remaining(&pkt) != cert_list_len) { | |
0f113f3e MC |
1274 | al = SSL_AD_DECODE_ERROR; |
1275 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); | |
1276 | goto f_err; | |
1277 | } | |
df758a85 MC |
1278 | while (PACKET_remaining(&pkt)) { |
1279 | if (!PACKET_get_net_3(&pkt, &cert_len) | |
1280 | || !PACKET_get_bytes(&pkt, &certbytes, cert_len)) { | |
0f113f3e MC |
1281 | al = SSL_AD_DECODE_ERROR; |
1282 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, | |
1283 | SSL_R_CERT_LENGTH_MISMATCH); | |
1284 | goto f_err; | |
1285 | } | |
1286 | ||
df758a85 MC |
1287 | certstart = certbytes; |
1288 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
1289 | if (x == NULL) { |
1290 | al = SSL_AD_BAD_CERTIFICATE; | |
1291 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); | |
1292 | goto f_err; | |
1293 | } | |
df758a85 | 1294 | if (certbytes != (certstart + cert_len)) { |
0f113f3e MC |
1295 | al = SSL_AD_DECODE_ERROR; |
1296 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, | |
1297 | SSL_R_CERT_LENGTH_MISMATCH); | |
1298 | goto f_err; | |
1299 | } | |
1300 | if (!sk_X509_push(sk, x)) { | |
1301 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); | |
cc273a93 | 1302 | goto err; |
0f113f3e MC |
1303 | } |
1304 | x = NULL; | |
0f113f3e MC |
1305 | } |
1306 | ||
1307 | i = ssl_verify_cert_chain(s, sk); | |
55a9a16f | 1308 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { |
0f113f3e MC |
1309 | al = ssl_verify_alarm_type(s->verify_result); |
1310 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, | |
1311 | SSL_R_CERTIFICATE_VERIFY_FAILED); | |
1312 | goto f_err; | |
1313 | } | |
1314 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1315 | if (i > 1) { | |
1316 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, i); | |
1317 | al = SSL_AD_HANDSHAKE_FAILURE; | |
1318 | goto f_err; | |
1319 | } | |
1320 | ||
c34b0f99 | 1321 | s->session->peer_chain = sk; |
0f113f3e MC |
1322 | /* |
1323 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
1324 | * which we don't include in s3_srvr.c | |
1325 | */ | |
1326 | x = sk_X509_value(sk, 0); | |
1327 | sk = NULL; | |
1328 | /* | |
1329 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1330 | */ | |
1331 | ||
1332 | pkey = X509_get_pubkey(x); | |
1333 | ||
55a9a16f | 1334 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
1335 | x = NULL; |
1336 | al = SSL3_AL_FATAL; | |
1337 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, | |
1338 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); | |
1339 | goto f_err; | |
1340 | } | |
1341 | ||
1342 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 1343 | if (i < 0) { |
0f113f3e MC |
1344 | x = NULL; |
1345 | al = SSL3_AL_FATAL; | |
1346 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, | |
1347 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); | |
1348 | goto f_err; | |
1349 | } | |
1350 | ||
55a9a16f MC |
1351 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); |
1352 | if (exp_idx >= 0 && i != exp_idx) { | |
1353 | x = NULL; | |
1354 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1355 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, | |
1356 | SSL_R_WRONG_CERTIFICATE_TYPE); | |
1357 | goto f_err; | |
0f113f3e | 1358 | } |
a273c6ee | 1359 | s->session->peer_type = i; |
55a9a16f MC |
1360 | |
1361 | X509_free(s->session->peer); | |
1362 | CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509); | |
1363 | s->session->peer = x; | |
0f113f3e MC |
1364 | s->session->verify_result = s->verify_result; |
1365 | ||
1366 | x = NULL; | |
1367 | ret = 1; | |
66696478 RS |
1368 | goto done; |
1369 | ||
0f113f3e | 1370 | f_err: |
66696478 | 1371 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 MC |
1372 | err: |
1373 | s->state = SSL_ST_ERR; | |
66696478 | 1374 | done: |
0f113f3e MC |
1375 | EVP_PKEY_free(pkey); |
1376 | X509_free(x); | |
1377 | sk_X509_pop_free(sk, X509_free); | |
1378 | return (ret); | |
1379 | } | |
d02b48c6 | 1380 | |
36d16f8e | 1381 | int ssl3_get_key_exchange(SSL *s) |
0f113f3e | 1382 | { |
bc36ee62 | 1383 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
1384 | unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2]; |
1385 | #endif | |
1386 | EVP_MD_CTX md_ctx; | |
1387 | unsigned char *param, *p; | |
1388 | int al, j, ok; | |
1389 | long i, param_len, n, alg_k, alg_a; | |
1390 | EVP_PKEY *pkey = NULL; | |
1391 | const EVP_MD *md = NULL; | |
bc36ee62 | 1392 | #ifndef OPENSSL_NO_RSA |
0f113f3e | 1393 | RSA *rsa = NULL; |
79df9d62 | 1394 | #endif |
bc36ee62 | 1395 | #ifndef OPENSSL_NO_DH |
0f113f3e | 1396 | DH *dh = NULL; |
58964a49 | 1397 | #endif |
10bf4fc2 | 1398 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
1399 | EC_KEY *ecdh = NULL; |
1400 | BN_CTX *bn_ctx = NULL; | |
1401 | EC_POINT *srvr_ecpoint = NULL; | |
1402 | int curve_nid = 0; | |
1403 | int encoded_pt_len = 0; | |
1404 | #endif | |
1405 | ||
1406 | EVP_MD_CTX_init(&md_ctx); | |
1407 | ||
1408 | /* | |
1409 | * use same message size as in ssl3_get_certificate_request() as | |
1410 | * ServerKeyExchange message may be skipped | |
1411 | */ | |
1412 | n = s->method->ssl_get_message(s, | |
1413 | SSL3_ST_CR_KEY_EXCH_A, | |
1414 | SSL3_ST_CR_KEY_EXCH_B, | |
1415 | -1, s->max_cert_list, &ok); | |
1416 | if (!ok) | |
1417 | return ((int)n); | |
1418 | ||
1419 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
1420 | ||
1421 | if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) { | |
1422 | /* | |
1423 | * Can't skip server key exchange if this is an ephemeral | |
1424 | * ciphersuite. | |
1425 | */ | |
7689082b | 1426 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK)) { |
0f113f3e MC |
1427 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
1428 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1429 | goto f_err; | |
1430 | } | |
a16ca4e8 | 1431 | |
0f113f3e MC |
1432 | s->s3->tmp.reuse_message = 1; |
1433 | return (1); | |
1434 | } | |
1435 | ||
1436 | param = p = (unsigned char *)s->init_msg; | |
8d92c1f8 | 1437 | |
bc36ee62 | 1438 | #ifndef OPENSSL_NO_RSA |
8d92c1f8 DSH |
1439 | RSA_free(s->s3->peer_rsa_tmp); |
1440 | s->s3->peer_rsa_tmp = NULL; | |
d02b48c6 | 1441 | #endif |
bc36ee62 | 1442 | #ifndef OPENSSL_NO_DH |
8d92c1f8 DSH |
1443 | DH_free(s->s3->peer_dh_tmp); |
1444 | s->s3->peer_dh_tmp = NULL; | |
ea262260 | 1445 | #endif |
10bf4fc2 | 1446 | #ifndef OPENSSL_NO_EC |
8d92c1f8 DSH |
1447 | EC_KEY_free(s->s3->peer_ecdh_tmp); |
1448 | s->s3->peer_ecdh_tmp = NULL; | |
d02b48c6 | 1449 | #endif |
8d92c1f8 | 1450 | |
0f113f3e MC |
1451 | /* Total length of the parameters including the length prefix */ |
1452 | param_len = 0; | |
f2be92b9 | 1453 | |
0f113f3e | 1454 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; |
d02b48c6 | 1455 | |
0f113f3e | 1456 | al = SSL_AD_DECODE_ERROR; |
f2be92b9 | 1457 | |
ddac1974 | 1458 | #ifndef OPENSSL_NO_PSK |
7689082b DSH |
1459 | /* PSK ciphersuites are preceded by an identity hint */ |
1460 | if (alg_k & SSL_PSK) { | |
0f113f3e MC |
1461 | |
1462 | param_len = 2; | |
1463 | if (param_len > n) { | |
1464 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1465 | goto f_err; | |
1466 | } | |
1467 | n2s(p, i); | |
1468 | ||
1469 | /* | |
1470 | * Store PSK identity hint for later use, hint is used in | |
1471 | * ssl3_send_client_key_exchange. Assume that the maximum length of | |
1472 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1473 | * identity. | |
1474 | */ | |
1475 | if (i > PSK_MAX_IDENTITY_LEN) { | |
1476 | al = SSL_AD_HANDSHAKE_FAILURE; | |
1477 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG); | |
1478 | goto f_err; | |
1479 | } | |
1480 | if (i > n - param_len) { | |
1481 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, | |
1482 | SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); | |
1483 | goto f_err; | |
1484 | } | |
1485 | param_len += i; | |
1486 | ||
a16ca4e8 | 1487 | OPENSSL_free(s->session->psk_identity_hint); |
7689082b DSH |
1488 | if (i != 0) { |
1489 | s->session->psk_identity_hint = BUF_strndup((char *)p, i); | |
1490 | if (s->session->psk_identity_hint == NULL) { | |
1491 | al = SSL_AD_HANDSHAKE_FAILURE; | |
1492 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
1493 | goto f_err; | |
1494 | } | |
1495 | } else { | |
1496 | s->session->psk_identity_hint = NULL; | |
0f113f3e MC |
1497 | } |
1498 | ||
1499 | p += i; | |
1500 | n -= param_len; | |
7689082b DSH |
1501 | } |
1502 | ||
1503 | /* Nothing else to do for plain PSK or RSAPSK */ | |
1504 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
0f113f3e MC |
1505 | } else |
1506 | #endif /* !OPENSSL_NO_PSK */ | |
edc032b5 | 1507 | #ifndef OPENSSL_NO_SRP |
0f113f3e MC |
1508 | if (alg_k & SSL_kSRP) { |
1509 | param_len = 2; | |
1510 | if (param_len > n) { | |
1511 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1512 | goto f_err; | |
1513 | } | |
1514 | n2s(p, i); | |
1515 | ||
1516 | if (i > n - param_len) { | |
1517 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_N_LENGTH); | |
1518 | goto f_err; | |
1519 | } | |
1520 | param_len += i; | |
1521 | ||
75ebbd9a | 1522 | if ((s->srp_ctx.N = BN_bin2bn(p, i, NULL)) == NULL) { |
0f113f3e MC |
1523 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1524 | goto err; | |
1525 | } | |
1526 | p += i; | |
1527 | ||
1528 | if (2 > n - param_len) { | |
1529 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1530 | goto f_err; | |
1531 | } | |
1532 | param_len += 2; | |
1533 | ||
1534 | n2s(p, i); | |
1535 | ||
1536 | if (i > n - param_len) { | |
1537 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_G_LENGTH); | |
1538 | goto f_err; | |
1539 | } | |
1540 | param_len += i; | |
1541 | ||
75ebbd9a | 1542 | if ((s->srp_ctx.g = BN_bin2bn(p, i, NULL)) == NULL) { |
0f113f3e MC |
1543 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1544 | goto err; | |
1545 | } | |
1546 | p += i; | |
1547 | ||
1548 | if (1 > n - param_len) { | |
1549 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1550 | goto f_err; | |
1551 | } | |
1552 | param_len += 1; | |
1553 | ||
1554 | i = (unsigned int)(p[0]); | |
1555 | p++; | |
1556 | ||
1557 | if (i > n - param_len) { | |
1558 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_S_LENGTH); | |
1559 | goto f_err; | |
1560 | } | |
1561 | param_len += i; | |
1562 | ||
75ebbd9a | 1563 | if ((s->srp_ctx.s = BN_bin2bn(p, i, NULL)) == NULL) { |
0f113f3e MC |
1564 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1565 | goto err; | |
1566 | } | |
1567 | p += i; | |
1568 | ||
1569 | if (2 > n - param_len) { | |
1570 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1571 | goto f_err; | |
1572 | } | |
1573 | param_len += 2; | |
1574 | ||
1575 | n2s(p, i); | |
1576 | ||
1577 | if (i > n - param_len) { | |
1578 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_B_LENGTH); | |
1579 | goto f_err; | |
1580 | } | |
1581 | param_len += i; | |
1582 | ||
75ebbd9a | 1583 | if ((s->srp_ctx.B = BN_bin2bn(p, i, NULL)) == NULL) { |
0f113f3e MC |
1584 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1585 | goto err; | |
1586 | } | |
1587 | p += i; | |
1588 | n -= param_len; | |
1589 | ||
1590 | if (!srp_verify_server_param(s, &al)) { | |
1591 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS); | |
1592 | goto f_err; | |
1593 | } | |
0989790b | 1594 | |
edc032b5 | 1595 | /* We must check if there is a certificate */ |
8df53b7a | 1596 | if (alg_a & (SSL_aRSA|SSL_aDSS)) |
a273c6ee | 1597 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e MC |
1598 | } else |
1599 | #endif /* !OPENSSL_NO_SRP */ | |
edc032b5 | 1600 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
1601 | if (alg_k & SSL_kRSA) { |
1602 | /* Temporary RSA keys only allowed in export ciphersuites */ | |
1603 | if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) { | |
1604 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1605 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); | |
1606 | goto f_err; | |
1607 | } | |
1608 | if ((rsa = RSA_new()) == NULL) { | |
1609 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
1610 | goto err; | |
1611 | } | |
1612 | ||
1613 | param_len = 2; | |
1614 | if (param_len > n) { | |
1615 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1616 | goto f_err; | |
1617 | } | |
1618 | n2s(p, i); | |
1619 | ||
1620 | if (i > n - param_len) { | |
1621 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_MODULUS_LENGTH); | |
1622 | goto f_err; | |
1623 | } | |
1624 | param_len += i; | |
1625 | ||
75ebbd9a | 1626 | if ((rsa->n = BN_bin2bn(p, i, rsa->n)) == NULL) { |
0f113f3e MC |
1627 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1628 | goto err; | |
1629 | } | |
1630 | p += i; | |
1631 | ||
1632 | if (2 > n - param_len) { | |
1633 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1634 | goto f_err; | |
1635 | } | |
1636 | param_len += 2; | |
1637 | ||
1638 | n2s(p, i); | |
1639 | ||
1640 | if (i > n - param_len) { | |
1641 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_E_LENGTH); | |
1642 | goto f_err; | |
1643 | } | |
1644 | param_len += i; | |
1645 | ||
75ebbd9a | 1646 | if ((rsa->e = BN_bin2bn(p, i, rsa->e)) == NULL) { |
0f113f3e MC |
1647 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1648 | goto err; | |
1649 | } | |
1650 | p += i; | |
1651 | n -= param_len; | |
1652 | ||
1653 | /* this should be because we are using an export cipher */ | |
1654 | if (alg_a & SSL_aRSA) | |
a273c6ee | 1655 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e MC |
1656 | else { |
1657 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
1658 | goto err; | |
1659 | } | |
1dece951 KR |
1660 | |
1661 | if (EVP_PKEY_bits(pkey) <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { | |
1662 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1663 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); | |
1664 | goto f_err; | |
1665 | } | |
1666 | ||
8d92c1f8 | 1667 | s->s3->peer_rsa_tmp = rsa; |
0f113f3e MC |
1668 | rsa = NULL; |
1669 | } | |
1670 | #else /* OPENSSL_NO_RSA */ | |
1671 | if (0) ; | |
d02b48c6 | 1672 | #endif |
bc36ee62 | 1673 | #ifndef OPENSSL_NO_DH |
7689082b | 1674 | else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
0f113f3e MC |
1675 | if ((dh = DH_new()) == NULL) { |
1676 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB); | |
1677 | goto err; | |
1678 | } | |
1679 | ||
1680 | param_len = 2; | |
1681 | if (param_len > n) { | |
1682 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1683 | goto f_err; | |
1684 | } | |
1685 | n2s(p, i); | |
1686 | ||
1687 | if (i > n - param_len) { | |
1688 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_P_LENGTH); | |
1689 | goto f_err; | |
1690 | } | |
1691 | param_len += i; | |
1692 | ||
75ebbd9a | 1693 | if ((dh->p = BN_bin2bn(p, i, NULL)) == NULL) { |
0f113f3e MC |
1694 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1695 | goto err; | |
1696 | } | |
1697 | p += i; | |
1698 | ||
61e72d76 GL |
1699 | if (BN_is_zero(dh->p)) { |
1700 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_P_VALUE); | |
1701 | goto f_err; | |
1702 | } | |
1703 | ||
1704 | ||
0f113f3e MC |
1705 | if (2 > n - param_len) { |
1706 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1707 | goto f_err; | |
1708 | } | |
1709 | param_len += 2; | |
1710 | ||
1711 | n2s(p, i); | |
1712 | ||
1713 | if (i > n - param_len) { | |
1714 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_G_LENGTH); | |
1715 | goto f_err; | |
1716 | } | |
1717 | param_len += i; | |
1718 | ||
75ebbd9a | 1719 | if ((dh->g = BN_bin2bn(p, i, NULL)) == NULL) { |
0f113f3e MC |
1720 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1721 | goto err; | |
1722 | } | |
1723 | p += i; | |
1724 | ||
61e72d76 GL |
1725 | if (BN_is_zero(dh->g)) { |
1726 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_G_VALUE); | |
1727 | goto f_err; | |
1728 | } | |
1729 | ||
0f113f3e MC |
1730 | if (2 > n - param_len) { |
1731 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1732 | goto f_err; | |
1733 | } | |
1734 | param_len += 2; | |
1735 | ||
1736 | n2s(p, i); | |
1737 | ||
1738 | if (i > n - param_len) { | |
1739 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_PUB_KEY_LENGTH); | |
1740 | goto f_err; | |
1741 | } | |
1742 | param_len += i; | |
1743 | ||
75ebbd9a | 1744 | if ((dh->pub_key = BN_bin2bn(p, i, NULL)) == NULL) { |
0f113f3e MC |
1745 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1746 | goto err; | |
1747 | } | |
1748 | p += i; | |
1749 | n -= param_len; | |
1750 | ||
61e72d76 GL |
1751 | if (BN_is_zero(dh->pub_key)) { |
1752 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_PUB_KEY_VALUE); | |
1753 | goto f_err; | |
1754 | } | |
1755 | ||
0f113f3e MC |
1756 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { |
1757 | al = SSL_AD_HANDSHAKE_FAILURE; | |
1758 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL); | |
1759 | goto f_err; | |
1760 | } | |
8df53b7a | 1761 | if (alg_a & (SSL_aRSA|SSL_aDSS)) |
a273c6ee | 1762 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e MC |
1763 | /* else anonymous DH, so no certificate or pkey. */ |
1764 | ||
8d92c1f8 | 1765 | s->s3->peer_dh_tmp = dh; |
0f113f3e | 1766 | dh = NULL; |
0f113f3e MC |
1767 | } |
1768 | #endif /* !OPENSSL_NO_DH */ | |
ea262260 | 1769 | |
10bf4fc2 | 1770 | #ifndef OPENSSL_NO_EC |
7689082b | 1771 | else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
0f113f3e MC |
1772 | EC_GROUP *ngroup; |
1773 | const EC_GROUP *group; | |
1774 | ||
1775 | if ((ecdh = EC_KEY_new()) == NULL) { | |
1776 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
1777 | goto err; | |
1778 | } | |
1779 | ||
1780 | /* | |
1781 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
1782 | * public key. Keep accumulating lengths of various components in | |
1783 | * param_len and make sure it never exceeds n. | |
1784 | */ | |
1785 | ||
1786 | /* | |
1787 | * XXX: For now we only support named (not generic) curves and the | |
1788 | * ECParameters in this case is just three bytes. We also need one | |
1789 | * byte for the length of the encoded point | |
1790 | */ | |
1791 | param_len = 4; | |
1792 | if (param_len > n) { | |
1793 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1794 | goto f_err; | |
1795 | } | |
1796 | /* | |
1797 | * Check curve is one of our preferences, if not server has sent an | |
1798 | * invalid curve. ECParameters is 3 bytes. | |
1799 | */ | |
1800 | if (!tls1_check_curve(s, p, 3)) { | |
1801 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_CURVE); | |
1802 | goto f_err; | |
1803 | } | |
1804 | ||
1805 | if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0) { | |
1806 | al = SSL_AD_INTERNAL_ERROR; | |
1807 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, | |
1808 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); | |
1809 | goto f_err; | |
1810 | } | |
1811 | ||
1812 | ngroup = EC_GROUP_new_by_curve_name(curve_nid); | |
1813 | if (ngroup == NULL) { | |
1814 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB); | |
1815 | goto err; | |
1816 | } | |
1817 | if (EC_KEY_set_group(ecdh, ngroup) == 0) { | |
1818 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB); | |
1819 | goto err; | |
1820 | } | |
1821 | EC_GROUP_free(ngroup); | |
1822 | ||
1823 | group = EC_KEY_get0_group(ecdh); | |
1824 | ||
1825 | if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && | |
1826 | (EC_GROUP_get_degree(group) > 163)) { | |
1827 | al = SSL_AD_EXPORT_RESTRICTION; | |
1828 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, | |
1829 | SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); | |
1830 | goto f_err; | |
1831 | } | |
1832 | ||
1833 | p += 3; | |
1834 | ||
1835 | /* Next, get the encoded ECPoint */ | |
1836 | if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || | |
1837 | ((bn_ctx = BN_CTX_new()) == NULL)) { | |
1838 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
1839 | goto err; | |
1840 | } | |
1841 | ||
1842 | encoded_pt_len = *p; /* length of encoded point */ | |
1843 | p += 1; | |
1844 | ||
1845 | if ((encoded_pt_len > n - param_len) || | |
1846 | (EC_POINT_oct2point(group, srvr_ecpoint, | |
1847 | p, encoded_pt_len, bn_ctx) == 0)) { | |
1848 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT); | |
1849 | goto f_err; | |
1850 | } | |
1851 | param_len += encoded_pt_len; | |
1852 | ||
1853 | n -= param_len; | |
1854 | p += encoded_pt_len; | |
1855 | ||
1856 | /* | |
1857 | * The ECC/TLS specification does not mention the use of DSA to sign | |
1858 | * ECParameters in the server key exchange message. We do support RSA | |
1859 | * and ECDSA. | |
1860 | */ | |
1861 | if (0) ; | |
1862 | # ifndef OPENSSL_NO_RSA | |
1863 | else if (alg_a & SSL_aRSA) | |
a273c6ee | 1864 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e | 1865 | # endif |
10bf4fc2 | 1866 | # ifndef OPENSSL_NO_EC |
0f113f3e | 1867 | else if (alg_a & SSL_aECDSA) |
a273c6ee | 1868 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e MC |
1869 | # endif |
1870 | /* else anonymous ECDH, so no certificate or pkey. */ | |
1871 | EC_KEY_set_public_key(ecdh, srvr_ecpoint); | |
8d92c1f8 | 1872 | s->s3->peer_ecdh_tmp = ecdh; |
0f113f3e MC |
1873 | ecdh = NULL; |
1874 | BN_CTX_free(bn_ctx); | |
1875 | bn_ctx = NULL; | |
1876 | EC_POINT_free(srvr_ecpoint); | |
1877 | srvr_ecpoint = NULL; | |
1878 | } else if (alg_k) { | |
1879 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1880 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); | |
1881 | goto f_err; | |
1882 | } | |
10bf4fc2 | 1883 | #endif /* !OPENSSL_NO_EC */ |
0f113f3e MC |
1884 | |
1885 | /* p points to the next byte, there are 'n' bytes left */ | |
1886 | ||
1887 | /* if it was signed, check the signature */ | |
1888 | if (pkey != NULL) { | |
1889 | if (SSL_USE_SIGALGS(s)) { | |
1890 | int rv; | |
1891 | if (2 > n) { | |
1892 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1893 | goto f_err; | |
1894 | } | |
1895 | rv = tls12_check_peer_sigalg(&md, s, p, pkey); | |
1896 | if (rv == -1) | |
1897 | goto err; | |
1898 | else if (rv == 0) { | |
1899 | goto f_err; | |
1900 | } | |
a2f9200f | 1901 | #ifdef SSL_DEBUG |
0f113f3e MC |
1902 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
1903 | #endif | |
1904 | p += 2; | |
1905 | n -= 2; | |
1906 | } else | |
1907 | md = EVP_sha1(); | |
1908 | ||
1909 | if (2 > n) { | |
1910 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1911 | goto f_err; | |
1912 | } | |
1913 | n2s(p, i); | |
1914 | n -= 2; | |
1915 | j = EVP_PKEY_size(pkey); | |
1916 | ||
1917 | /* | |
1918 | * Check signature length. If n is 0 then signature is empty | |
1919 | */ | |
1920 | if ((i != n) || (n > j) || (n <= 0)) { | |
1921 | /* wrong packet length */ | |
1922 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH); | |
1923 | goto f_err; | |
1924 | } | |
bc36ee62 | 1925 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
1926 | if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s)) { |
1927 | int num; | |
1928 | unsigned int size; | |
1929 | ||
1930 | j = 0; | |
1931 | q = md_buf; | |
1932 | for (num = 2; num > 0; num--) { | |
1933 | EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); | |
1934 | EVP_DigestInit_ex(&md_ctx, (num == 2) | |
1935 | ? s->ctx->md5 : s->ctx->sha1, NULL); | |
1936 | EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]), | |
1937 | SSL3_RANDOM_SIZE); | |
1938 | EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]), | |
1939 | SSL3_RANDOM_SIZE); | |
1940 | EVP_DigestUpdate(&md_ctx, param, param_len); | |
1941 | EVP_DigestFinal_ex(&md_ctx, q, &size); | |
1942 | q += size; | |
1943 | j += size; | |
1944 | } | |
1945 | i = RSA_verify(NID_md5_sha1, md_buf, j, p, n, pkey->pkey.rsa); | |
1946 | if (i < 0) { | |
1947 | al = SSL_AD_DECRYPT_ERROR; | |
1948 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT); | |
1949 | goto f_err; | |
1950 | } | |
1951 | if (i == 0) { | |
1952 | /* bad signature */ | |
1953 | al = SSL_AD_DECRYPT_ERROR; | |
1954 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
1955 | goto f_err; | |
1956 | } | |
1957 | } else | |
1958 | #endif | |
1959 | { | |
1960 | EVP_VerifyInit_ex(&md_ctx, md, NULL); | |
1961 | EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]), | |
1962 | SSL3_RANDOM_SIZE); | |
1963 | EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]), | |
1964 | SSL3_RANDOM_SIZE); | |
1965 | EVP_VerifyUpdate(&md_ctx, param, param_len); | |
1966 | if (EVP_VerifyFinal(&md_ctx, p, (int)n, pkey) <= 0) { | |
1967 | /* bad signature */ | |
1968 | al = SSL_AD_DECRYPT_ERROR; | |
1969 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
1970 | goto f_err; | |
1971 | } | |
1972 | } | |
1973 | } else { | |
7689082b DSH |
1974 | /* aNULL, aSRP or PSK do not need public keys */ |
1975 | if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_PSK)) { | |
0f113f3e MC |
1976 | /* Might be wrong key type, check it */ |
1977 | if (ssl3_check_cert_and_algorithm(s)) | |
1978 | /* Otherwise this shouldn't happen */ | |
1979 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
1980 | goto err; | |
1981 | } | |
1982 | /* still data left over */ | |
1983 | if (n != 0) { | |
1984 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); | |
1985 | goto f_err; | |
1986 | } | |
1987 | } | |
1988 | EVP_PKEY_free(pkey); | |
1989 | EVP_MD_CTX_cleanup(&md_ctx); | |
1990 | return (1); | |
1991 | f_err: | |
1992 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1993 | err: | |
1994 | EVP_PKEY_free(pkey); | |
bc36ee62 | 1995 | #ifndef OPENSSL_NO_RSA |
d6407083 | 1996 | RSA_free(rsa); |
6b521df3 | 1997 | #endif |
bc36ee62 | 1998 | #ifndef OPENSSL_NO_DH |
d6407083 | 1999 | DH_free(dh); |
ea262260 | 2000 | #endif |
10bf4fc2 | 2001 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
2002 | BN_CTX_free(bn_ctx); |
2003 | EC_POINT_free(srvr_ecpoint); | |
8fdc3734 | 2004 | EC_KEY_free(ecdh); |
6b521df3 | 2005 | #endif |
0f113f3e | 2006 | EVP_MD_CTX_cleanup(&md_ctx); |
cc273a93 | 2007 | s->state = SSL_ST_ERR; |
0f113f3e MC |
2008 | return (-1); |
2009 | } | |
d02b48c6 | 2010 | |
36d16f8e | 2011 | int ssl3_get_certificate_request(SSL *s) |
0f113f3e MC |
2012 | { |
2013 | int ok, ret = 0; | |
2014 | unsigned long n, nc, l; | |
2015 | unsigned int llen, ctype_num, i; | |
2016 | X509_NAME *xn = NULL; | |
2017 | const unsigned char *p, *q; | |
2018 | unsigned char *d; | |
2019 | STACK_OF(X509_NAME) *ca_sk = NULL; | |
2020 | ||
2021 | n = s->method->ssl_get_message(s, | |
2022 | SSL3_ST_CR_CERT_REQ_A, | |
2023 | SSL3_ST_CR_CERT_REQ_B, | |
2024 | -1, s->max_cert_list, &ok); | |
2025 | ||
2026 | if (!ok) | |
2027 | return ((int)n); | |
2028 | ||
2029 | s->s3->tmp.cert_req = 0; | |
2030 | ||
2031 | if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) { | |
2032 | s->s3->tmp.reuse_message = 1; | |
2033 | /* | |
2034 | * If we get here we don't need any cached handshake records as we | |
2035 | * wont be doing client auth. | |
2036 | */ | |
124037fd DSH |
2037 | if (!ssl3_digest_cached_records(s, 0)) |
2038 | goto err; | |
0f113f3e MC |
2039 | return (1); |
2040 | } | |
2041 | ||
2042 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) { | |
2043 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); | |
2044 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_WRONG_MESSAGE_TYPE); | |
2045 | goto err; | |
2046 | } | |
2047 | ||
2048 | /* TLS does not like anon-DH with client cert */ | |
2049 | if (s->version > SSL3_VERSION) { | |
2050 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) { | |
2051 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); | |
2052 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, | |
2053 | SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); | |
2054 | goto err; | |
2055 | } | |
2056 | } | |
2057 | ||
2058 | p = d = (unsigned char *)s->init_msg; | |
2059 | ||
2060 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { | |
2061 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); | |
2062 | goto err; | |
2063 | } | |
2064 | ||
2065 | /* get the certificate types */ | |
2066 | ctype_num = *(p++); | |
b548a1f1 RS |
2067 | OPENSSL_free(s->cert->ctypes); |
2068 | s->cert->ctypes = NULL; | |
0f113f3e MC |
2069 | if (ctype_num > SSL3_CT_NUMBER) { |
2070 | /* If we exceed static buffer copy all to cert structure */ | |
2071 | s->cert->ctypes = OPENSSL_malloc(ctype_num); | |
2072 | if (s->cert->ctypes == NULL) { | |
2073 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); | |
2074 | goto err; | |
2075 | } | |
2076 | memcpy(s->cert->ctypes, p, ctype_num); | |
2077 | s->cert->ctype_num = (size_t)ctype_num; | |
2078 | ctype_num = SSL3_CT_NUMBER; | |
2079 | } | |
2080 | for (i = 0; i < ctype_num; i++) | |
2081 | s->s3->tmp.ctype[i] = p[i]; | |
2082 | p += p[-1]; | |
2083 | if (SSL_USE_SIGALGS(s)) { | |
2084 | n2s(p, llen); | |
2085 | /* | |
2086 | * Check we have enough room for signature algorithms and following | |
2087 | * length value. | |
2088 | */ | |
2089 | if ((unsigned long)(p - d + llen + 2) > n) { | |
2090 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2091 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, | |
2092 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2093 | goto err; | |
2094 | } | |
2095 | /* Clear certificate digests and validity flags */ | |
2096 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
d376e57d | 2097 | s->s3->tmp.md[i] = NULL; |
6383d316 | 2098 | s->s3->tmp.valid_flags[i] = 0; |
0f113f3e MC |
2099 | } |
2100 | if ((llen & 1) || !tls1_save_sigalgs(s, p, llen)) { | |
2101 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2102 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, | |
2103 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); | |
2104 | goto err; | |
2105 | } | |
2106 | if (!tls1_process_sigalgs(s)) { | |
2107 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2108 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); | |
2109 | goto err; | |
2110 | } | |
2111 | p += llen; | |
2112 | } | |
2113 | ||
2114 | /* get the CA RDNs */ | |
2115 | n2s(p, llen); | |
0f113f3e MC |
2116 | |
2117 | if ((unsigned long)(p - d + llen) != n) { | |
2118 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2119 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); | |
2120 | goto err; | |
2121 | } | |
2122 | ||
2123 | for (nc = 0; nc < llen;) { | |
2124 | n2s(p, l); | |
2125 | if ((l + nc + 2) > llen) { | |
0f113f3e MC |
2126 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
2127 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_CA_DN_TOO_LONG); | |
2128 | goto err; | |
2129 | } | |
2130 | ||
2131 | q = p; | |
2132 | ||
2133 | if ((xn = d2i_X509_NAME(NULL, &q, l)) == NULL) { | |
3c33c6f6 MC |
2134 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
2135 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); | |
2136 | goto err; | |
0f113f3e MC |
2137 | } |
2138 | ||
2139 | if (q != (p + l)) { | |
2140 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2141 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, | |
2142 | SSL_R_CA_DN_LENGTH_MISMATCH); | |
2143 | goto err; | |
2144 | } | |
2145 | if (!sk_X509_NAME_push(ca_sk, xn)) { | |
2146 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); | |
2147 | goto err; | |
2148 | } | |
2149 | ||
2150 | p += l; | |
2151 | nc += l + 2; | |
2152 | } | |
2153 | ||
0f113f3e MC |
2154 | /* we should setup a certificate to return.... */ |
2155 | s->s3->tmp.cert_req = 1; | |
2156 | s->s3->tmp.ctype_num = ctype_num; | |
222561fe | 2157 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
0f113f3e MC |
2158 | s->s3->tmp.ca_names = ca_sk; |
2159 | ca_sk = NULL; | |
2160 | ||
2161 | ret = 1; | |
cc273a93 | 2162 | goto done; |
0f113f3e | 2163 | err: |
cc273a93 MC |
2164 | s->state = SSL_ST_ERR; |
2165 | done: | |
222561fe | 2166 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
0f113f3e MC |
2167 | return (ret); |
2168 | } | |
2169 | ||
2170 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
dfeab068 | 2171 | { |
0f113f3e | 2172 | return (X509_NAME_cmp(*a, *b)); |
dfeab068 | 2173 | } |
dfeab068 | 2174 | |
6434abbf | 2175 | int ssl3_get_new_session_ticket(SSL *s) |
0f113f3e MC |
2176 | { |
2177 | int ok, al, ret = 0, ticklen; | |
2178 | long n; | |
2179 | const unsigned char *p; | |
2180 | unsigned char *d; | |
2181 | ||
2182 | n = s->method->ssl_get_message(s, | |
2183 | SSL3_ST_CR_SESSION_TICKET_A, | |
2184 | SSL3_ST_CR_SESSION_TICKET_B, | |
2185 | SSL3_MT_NEWSESSION_TICKET, 16384, &ok); | |
2186 | ||
2187 | if (!ok) | |
2188 | return ((int)n); | |
2189 | ||
2190 | if (n < 6) { | |
2191 | /* need at least ticket_lifetime_hint + ticket length */ | |
2192 | al = SSL_AD_DECODE_ERROR; | |
2193 | SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); | |
2194 | goto f_err; | |
2195 | } | |
2196 | ||
2197 | p = d = (unsigned char *)s->init_msg; | |
98ece4ee MC |
2198 | |
2199 | if (s->session->session_id_length > 0) { | |
2200 | int i = s->session_ctx->session_cache_mode; | |
2201 | SSL_SESSION *new_sess; | |
2202 | /* | |
2203 | * We reused an existing session, so we need to replace it with a new | |
2204 | * one | |
2205 | */ | |
2206 | if (i & SSL_SESS_CACHE_CLIENT) { | |
2207 | /* | |
2208 | * Remove the old session from the cache | |
2209 | */ | |
2210 | if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) { | |
2211 | if (s->session_ctx->remove_session_cb != NULL) | |
2212 | s->session_ctx->remove_session_cb(s->session_ctx, | |
2213 | s->session); | |
2214 | } else { | |
2215 | /* We carry on if this fails */ | |
2216 | SSL_CTX_remove_session(s->session_ctx, s->session); | |
2217 | } | |
2218 | } | |
2219 | ||
2220 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
2221 | al = SSL_AD_INTERNAL_ERROR; | |
2222 | SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); | |
2223 | goto f_err; | |
2224 | } | |
2225 | ||
2226 | SSL_SESSION_free(s->session); | |
2227 | s->session = new_sess; | |
2228 | } | |
2229 | ||
0f113f3e MC |
2230 | n2l(p, s->session->tlsext_tick_lifetime_hint); |
2231 | n2s(p, ticklen); | |
2232 | /* ticket_lifetime_hint + ticket_length + ticket */ | |
2233 | if (ticklen + 6 != n) { | |
2234 | al = SSL_AD_DECODE_ERROR; | |
2235 | SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); | |
2236 | goto f_err; | |
2237 | } | |
b548a1f1 RS |
2238 | OPENSSL_free(s->session->tlsext_tick); |
2239 | s->session->tlsext_ticklen = 0; | |
0f113f3e MC |
2240 | s->session->tlsext_tick = OPENSSL_malloc(ticklen); |
2241 | if (!s->session->tlsext_tick) { | |
2242 | SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); | |
2243 | goto err; | |
2244 | } | |
2245 | memcpy(s->session->tlsext_tick, p, ticklen); | |
2246 | s->session->tlsext_ticklen = ticklen; | |
2247 | /* | |
2248 | * There are two ways to detect a resumed ticket session. One is to set | |
2249 | * an appropriate session ID and then the server must return a match in | |
2250 | * ServerHello. This allows the normal client session ID matching to work | |
2251 | * and we know much earlier that the ticket has been accepted. The | |
2252 | * other way is to set zero length session ID when the ticket is | |
2253 | * presented and rely on the handshake to determine session resumption. | |
2254 | * We choose the former approach because this fits in with assumptions | |
2255 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2256 | * SHA256 is disabled) hash of the ticket. | |
2257 | */ | |
2258 | EVP_Digest(p, ticklen, | |
2259 | s->session->session_id, &s->session->session_id_length, | |
0f113f3e | 2260 | EVP_sha256(), NULL); |
0f113f3e MC |
2261 | ret = 1; |
2262 | return (ret); | |
2263 | f_err: | |
2264 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2265 | err: | |
cc273a93 | 2266 | s->state = SSL_ST_ERR; |
0f113f3e MC |
2267 | return (-1); |
2268 | } | |
67c8e7f4 DSH |
2269 | |
2270 | int ssl3_get_cert_status(SSL *s) | |
0f113f3e MC |
2271 | { |
2272 | int ok, al; | |
2273 | unsigned long resplen, n; | |
ac63710a MC |
2274 | unsigned int type; |
2275 | PACKET pkt; | |
0f113f3e MC |
2276 | |
2277 | n = s->method->ssl_get_message(s, | |
2278 | SSL3_ST_CR_CERT_STATUS_A, | |
2279 | SSL3_ST_CR_CERT_STATUS_B, | |
2280 | SSL3_MT_CERTIFICATE_STATUS, 16384, &ok); | |
2281 | ||
2282 | if (!ok) | |
2283 | return ((int)n); | |
ac63710a MC |
2284 | |
2285 | if (!PACKET_buf_init(&pkt, s->init_msg, n)) { | |
2286 | al = SSL_AD_INTERNAL_ERROR; | |
2287 | SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
2288 | goto f_err; |
2289 | } | |
ac63710a MC |
2290 | if (!PACKET_get_1(&pkt, &type) |
2291 | || type != TLSEXT_STATUSTYPE_ocsp) { | |
0f113f3e MC |
2292 | al = SSL_AD_DECODE_ERROR; |
2293 | SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE); | |
2294 | goto f_err; | |
2295 | } | |
ac63710a MC |
2296 | if (!PACKET_get_net_3(&pkt, &resplen) |
2297 | || PACKET_remaining(&pkt) != resplen) { | |
0f113f3e MC |
2298 | al = SSL_AD_DECODE_ERROR; |
2299 | SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH); | |
2300 | goto f_err; | |
2301 | } | |
b548a1f1 | 2302 | OPENSSL_free(s->tlsext_ocsp_resp); |
ac63710a | 2303 | s->tlsext_ocsp_resp = OPENSSL_malloc(resplen); |
0f113f3e MC |
2304 | if (!s->tlsext_ocsp_resp) { |
2305 | al = SSL_AD_INTERNAL_ERROR; | |
2306 | SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE); | |
2307 | goto f_err; | |
2308 | } | |
ac63710a MC |
2309 | if (!PACKET_copy_bytes(&pkt, s->tlsext_ocsp_resp, resplen)) { |
2310 | al = SSL_AD_DECODE_ERROR; | |
2311 | SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH); | |
2312 | goto f_err; | |
2313 | } | |
0f113f3e MC |
2314 | s->tlsext_ocsp_resplen = resplen; |
2315 | if (s->ctx->tlsext_status_cb) { | |
2316 | int ret; | |
2317 | ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); | |
2318 | if (ret == 0) { | |
2319 | al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; | |
2320 | SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE); | |
2321 | goto f_err; | |
2322 | } | |
2323 | if (ret < 0) { | |
2324 | al = SSL_AD_INTERNAL_ERROR; | |
2325 | SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE); | |
2326 | goto f_err; | |
2327 | } | |
2328 | } | |
2329 | return 1; | |
2330 | f_err: | |
2331 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
cc273a93 | 2332 | s->state = SSL_ST_ERR; |
0f113f3e MC |
2333 | return (-1); |
2334 | } | |
d02b48c6 | 2335 | |
36d16f8e | 2336 | int ssl3_get_server_done(SSL *s) |
0f113f3e MC |
2337 | { |
2338 | int ok, ret = 0; | |
2339 | long n; | |
2340 | ||
2341 | /* Second to last param should be very small, like 0 :-) */ | |
2342 | n = s->method->ssl_get_message(s, | |
2343 | SSL3_ST_CR_SRVR_DONE_A, | |
2344 | SSL3_ST_CR_SRVR_DONE_B, | |
2345 | SSL3_MT_SERVER_DONE, 30, &ok); | |
2346 | ||
2347 | if (!ok) | |
2348 | return ((int)n); | |
2349 | if (n > 0) { | |
2350 | /* should contain no data */ | |
2351 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2352 | SSLerr(SSL_F_SSL3_GET_SERVER_DONE, SSL_R_LENGTH_MISMATCH); | |
cc273a93 | 2353 | s->state = SSL_ST_ERR; |
0f113f3e MC |
2354 | return -1; |
2355 | } | |
2356 | ret = 1; | |
2357 | return (ret); | |
2358 | } | |
176f31dd | 2359 | |
36d16f8e | 2360 | int ssl3_send_client_key_exchange(SSL *s) |
0f113f3e MC |
2361 | { |
2362 | unsigned char *p; | |
2363 | int n; | |
7689082b DSH |
2364 | #ifndef OPENSSL_NO_PSK |
2365 | size_t pskhdrlen = 0; | |
2366 | #endif | |
0f113f3e | 2367 | unsigned long alg_k; |
bc36ee62 | 2368 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
2369 | unsigned char *q; |
2370 | EVP_PKEY *pkey = NULL; | |
79df9d62 | 2371 | #endif |
10bf4fc2 | 2372 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
2373 | EC_KEY *clnt_ecdh = NULL; |
2374 | const EC_POINT *srvr_ecpoint = NULL; | |
2375 | EVP_PKEY *srvr_pub_pkey = NULL; | |
2376 | unsigned char *encodedPoint = NULL; | |
2377 | int encoded_pt_len = 0; | |
2378 | BN_CTX *bn_ctx = NULL; | |
ea262260 | 2379 | #endif |
c660ec63 DSH |
2380 | unsigned char *pms = NULL; |
2381 | size_t pmslen = 0; | |
7689082b | 2382 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
d02b48c6 | 2383 | |
0f113f3e MC |
2384 | if (s->state == SSL3_ST_CW_KEY_EXCH_A) { |
2385 | p = ssl_handshake_start(s); | |
d02b48c6 | 2386 | |
7689082b DSH |
2387 | |
2388 | #ifndef OPENSSL_NO_PSK | |
2389 | if (alg_k & SSL_PSK) { | |
2390 | int psk_err = 1; | |
2391 | /* | |
2392 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2393 | * \0-terminated identity. The last byte is for us for simulating | |
2394 | * strnlen. | |
2395 | */ | |
2396 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
2397 | size_t identitylen; | |
2398 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
2399 | size_t psklen; | |
2400 | ||
2401 | if (s->psk_client_callback == NULL) { | |
2402 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2403 | SSL_R_PSK_NO_CLIENT_CB); | |
2404 | goto err; | |
2405 | } | |
2406 | ||
2407 | memset(identity, 0, sizeof(identity)); | |
2408 | ||
2409 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, | |
2410 | identity, sizeof(identity) - 1, | |
2411 | psk, sizeof(psk)); | |
2412 | ||
2413 | if (psklen > PSK_MAX_PSK_LEN) { | |
2414 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2415 | ERR_R_INTERNAL_ERROR); | |
2416 | goto psk_err; | |
2417 | } else if (psklen == 0) { | |
2418 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2419 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
2420 | goto psk_err; | |
2421 | } | |
2422 | ||
2423 | OPENSSL_free(s->s3->tmp.psk); | |
2424 | s->s3->tmp.psk = BUF_memdup(psk, psklen); | |
2425 | OPENSSL_cleanse(psk, psklen); | |
2426 | ||
3df16cc2 DSH |
2427 | if (s->s3->tmp.psk == NULL) { |
2428 | OPENSSL_cleanse(identity, sizeof(identity)); | |
7689082b | 2429 | goto memerr; |
3df16cc2 | 2430 | } |
7689082b DSH |
2431 | |
2432 | s->s3->tmp.psklen = psklen; | |
2433 | ||
2434 | identitylen = strlen(identity); | |
2435 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
2436 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2437 | ERR_R_INTERNAL_ERROR); | |
2438 | goto psk_err; | |
2439 | } | |
2440 | OPENSSL_free(s->session->psk_identity); | |
2441 | s->session->psk_identity = BUF_strdup(identity); | |
3df16cc2 DSH |
2442 | if (s->session->psk_identity == NULL) { |
2443 | OPENSSL_cleanse(identity, sizeof(identity)); | |
7689082b | 2444 | goto memerr; |
3df16cc2 | 2445 | } |
7689082b DSH |
2446 | |
2447 | s2n(identitylen, p); | |
2448 | memcpy(p, identity, identitylen); | |
2449 | pskhdrlen = 2 + identitylen; | |
2450 | p += identitylen; | |
2451 | psk_err = 0; | |
2452 | psk_err: | |
2453 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2454 | if (psk_err != 0) { | |
2455 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2456 | goto err; | |
2457 | } | |
2458 | } | |
2459 | if (alg_k & SSL_kPSK) { | |
2460 | n = 0; | |
2461 | } else | |
2462 | #endif | |
d02b48c6 | 2463 | |
0f113f3e MC |
2464 | /* Fool emacs indentation */ |
2465 | if (0) { | |
2466 | } | |
bc36ee62 | 2467 | #ifndef OPENSSL_NO_RSA |
7689082b | 2468 | else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
0f113f3e | 2469 | RSA *rsa; |
c660ec63 DSH |
2470 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2471 | pms = OPENSSL_malloc(pmslen); | |
2472 | if (!pms) | |
2473 | goto memerr; | |
0f113f3e | 2474 | |
389ebcec | 2475 | if (s->session->peer == NULL) { |
0f113f3e MC |
2476 | /* |
2477 | * We should always have a server certificate with SSL_kRSA. | |
2478 | */ | |
2479 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2480 | ERR_R_INTERNAL_ERROR); | |
2481 | goto err; | |
2482 | } | |
2483 | ||
8d92c1f8 DSH |
2484 | if (s->s3->peer_rsa_tmp != NULL) |
2485 | rsa = s->s3->peer_rsa_tmp; | |
0f113f3e | 2486 | else { |
a273c6ee | 2487 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e MC |
2488 | if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA) |
2489 | || (pkey->pkey.rsa == NULL)) { | |
2490 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2491 | ERR_R_INTERNAL_ERROR); | |
2492 | goto err; | |
2493 | } | |
2494 | rsa = pkey->pkey.rsa; | |
2495 | EVP_PKEY_free(pkey); | |
2496 | } | |
2497 | ||
c660ec63 DSH |
2498 | pms[0] = s->client_version >> 8; |
2499 | pms[1] = s->client_version & 0xff; | |
2500 | if (RAND_bytes(pms + 2, pmslen - 2) <= 0) | |
0f113f3e MC |
2501 | goto err; |
2502 | ||
0f113f3e MC |
2503 | q = p; |
2504 | /* Fix buf for TLS and beyond */ | |
2505 | if (s->version > SSL3_VERSION) | |
2506 | p += 2; | |
c660ec63 | 2507 | n = RSA_public_encrypt(pmslen, pms, p, rsa, RSA_PKCS1_PADDING); |
0f113f3e MC |
2508 | # ifdef PKCS1_CHECK |
2509 | if (s->options & SSL_OP_PKCS1_CHECK_1) | |
2510 | p[1]++; | |
2511 | if (s->options & SSL_OP_PKCS1_CHECK_2) | |
2512 | tmp_buf[0] = 0x70; | |
2513 | # endif | |
2514 | if (n <= 0) { | |
2515 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2516 | SSL_R_BAD_RSA_ENCRYPT); | |
2517 | goto err; | |
2518 | } | |
2519 | ||
2520 | /* Fix buf for TLS and beyond */ | |
2521 | if (s->version > SSL3_VERSION) { | |
2522 | s2n(n, q); | |
2523 | n += 2; | |
2524 | } | |
0f113f3e | 2525 | } |
f9b3bff6 | 2526 | #endif |
bc36ee62 | 2527 | #ifndef OPENSSL_NO_DH |
7689082b | 2528 | else if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd | SSL_kDHEPSK)) { |
0f113f3e | 2529 | DH *dh_srvr, *dh_clnt; |
8d92c1f8 DSH |
2530 | if (s->s3->peer_dh_tmp != NULL) |
2531 | dh_srvr = s->s3->peer_dh_tmp; | |
0f113f3e MC |
2532 | else { |
2533 | /* we get them from the cert */ | |
0f113f3e MC |
2534 | EVP_PKEY *spkey = NULL; |
2535 | dh_srvr = NULL; | |
a273c6ee | 2536 | spkey = X509_get_pubkey(s->session->peer); |
0f113f3e MC |
2537 | if (spkey) { |
2538 | dh_srvr = EVP_PKEY_get1_DH(spkey); | |
2539 | EVP_PKEY_free(spkey); | |
2540 | } | |
2541 | if (dh_srvr == NULL) { | |
2542 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2543 | ERR_R_INTERNAL_ERROR); | |
2544 | goto err; | |
2545 | } | |
2546 | } | |
2547 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
2548 | /* Use client certificate key */ | |
2549 | EVP_PKEY *clkey = s->cert->key->privatekey; | |
2550 | dh_clnt = NULL; | |
2551 | if (clkey) | |
2552 | dh_clnt = EVP_PKEY_get1_DH(clkey); | |
2553 | if (dh_clnt == NULL) { | |
2554 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2555 | ERR_R_INTERNAL_ERROR); | |
2556 | goto err; | |
2557 | } | |
2558 | } else { | |
2559 | /* generate a new random key */ | |
2560 | if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) { | |
2561 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); | |
2562 | goto err; | |
2563 | } | |
2564 | if (!DH_generate_key(dh_clnt)) { | |
2565 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); | |
2566 | DH_free(dh_clnt); | |
2567 | goto err; | |
2568 | } | |
2569 | } | |
2570 | ||
c660ec63 DSH |
2571 | pmslen = DH_size(dh_clnt); |
2572 | pms = OPENSSL_malloc(pmslen); | |
2573 | if (!pms) | |
2574 | goto memerr; | |
2575 | ||
0f113f3e MC |
2576 | /* |
2577 | * use the 'p' output buffer for the DH key, but make sure to | |
2578 | * clear it out afterwards | |
2579 | */ | |
2580 | ||
c660ec63 | 2581 | n = DH_compute_key(pms, dh_srvr->pub_key, dh_clnt); |
8d92c1f8 | 2582 | if (s->s3->peer_dh_tmp == NULL) |
0f113f3e MC |
2583 | DH_free(dh_srvr); |
2584 | ||
2585 | if (n <= 0) { | |
2586 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); | |
2587 | DH_free(dh_clnt); | |
2588 | goto err; | |
2589 | } | |
6b937f8b | 2590 | pmslen = n; |
0f113f3e | 2591 | |
0f113f3e MC |
2592 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) |
2593 | n = 0; | |
2594 | else { | |
2595 | /* send off the data */ | |
2596 | n = BN_num_bytes(dh_clnt->pub_key); | |
2597 | s2n(n, p); | |
2598 | BN_bn2bin(dh_clnt->pub_key, p); | |
2599 | n += 2; | |
2600 | } | |
2601 | ||
2602 | DH_free(dh_clnt); | |
0f113f3e | 2603 | } |
d02b48c6 | 2604 | #endif |
ea262260 | 2605 | |
10bf4fc2 | 2606 | #ifndef OPENSSL_NO_EC |
7689082b | 2607 | else if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe | SSL_kECDHEPSK)) { |
0f113f3e MC |
2608 | const EC_GROUP *srvr_group = NULL; |
2609 | EC_KEY *tkey; | |
2610 | int ecdh_clnt_cert = 0; | |
2611 | int field_size = 0; | |
0f113f3e MC |
2612 | /* |
2613 | * Did we send out the client's ECDH share for use in premaster | |
2614 | * computation as part of client certificate? If so, set | |
2615 | * ecdh_clnt_cert to 1. | |
2616 | */ | |
2617 | if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) { | |
50e735f9 MC |
2618 | /*- |
2619 | * XXX: For now, we do not support client | |
2620 | * authentication using ECDH certificates. | |
2621 | * To add such support, one needs to add | |
2622 | * code that checks for appropriate | |
2623 | * conditions and sets ecdh_clnt_cert to 1. | |
2624 | * For example, the cert have an ECC | |
2625 | * key on the same curve as the server's | |
2626 | * and the key should be authorized for | |
2627 | * key agreement. | |
2628 | * | |
2629 | * One also needs to add code in ssl3_connect | |
2630 | * to skip sending the certificate verify | |
2631 | * message. | |
2632 | * | |
2633 | * if ((s->cert->key->privatekey != NULL) && | |
2634 | * (s->cert->key->privatekey->type == | |
2635 | * EVP_PKEY_EC) && ...) | |
2636 | * ecdh_clnt_cert = 1; | |
2637 | */ | |
0f113f3e MC |
2638 | } |
2639 | ||
8d92c1f8 DSH |
2640 | if (s->s3->peer_ecdh_tmp != NULL) { |
2641 | tkey = s->s3->peer_ecdh_tmp; | |
0f113f3e MC |
2642 | } else { |
2643 | /* Get the Server Public Key from Cert */ | |
a273c6ee | 2644 | srvr_pub_pkey = X509_get_pubkey(s->session->peer); |
0f113f3e MC |
2645 | if ((srvr_pub_pkey == NULL) |
2646 | || (srvr_pub_pkey->type != EVP_PKEY_EC) | |
2647 | || (srvr_pub_pkey->pkey.ec == NULL)) { | |
2648 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2649 | ERR_R_INTERNAL_ERROR); | |
2650 | goto err; | |
2651 | } | |
2652 | ||
2653 | tkey = srvr_pub_pkey->pkey.ec; | |
2654 | } | |
2655 | ||
2656 | srvr_group = EC_KEY_get0_group(tkey); | |
2657 | srvr_ecpoint = EC_KEY_get0_public_key(tkey); | |
2658 | ||
2659 | if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) { | |
2660 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2661 | ERR_R_INTERNAL_ERROR); | |
2662 | goto err; | |
2663 | } | |
2664 | ||
2665 | if ((clnt_ecdh = EC_KEY_new()) == NULL) { | |
2666 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2667 | ERR_R_MALLOC_FAILURE); | |
2668 | goto err; | |
2669 | } | |
2670 | ||
2671 | if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) { | |
2672 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); | |
2673 | goto err; | |
2674 | } | |
2675 | if (ecdh_clnt_cert) { | |
2676 | /* | |
2677 | * Reuse key info from our certificate We only need our | |
2678 | * private key to perform the ECDH computation. | |
2679 | */ | |
2680 | const BIGNUM *priv_key; | |
2681 | tkey = s->cert->key->privatekey->pkey.ec; | |
2682 | priv_key = EC_KEY_get0_private_key(tkey); | |
2683 | if (priv_key == NULL) { | |
2684 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2685 | ERR_R_MALLOC_FAILURE); | |
2686 | goto err; | |
2687 | } | |
2688 | if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) { | |
2689 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); | |
2690 | goto err; | |
2691 | } | |
2692 | } else { | |
2693 | /* Generate a new ECDH key pair */ | |
2694 | if (!(EC_KEY_generate_key(clnt_ecdh))) { | |
2695 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2696 | ERR_R_ECDH_LIB); | |
2697 | goto err; | |
2698 | } | |
2699 | } | |
2700 | ||
2701 | /* | |
2702 | * use the 'p' output buffer for the ECDH key, but make sure to | |
2703 | * clear it out afterwards | |
2704 | */ | |
2705 | ||
2706 | field_size = EC_GROUP_get_degree(srvr_group); | |
2707 | if (field_size <= 0) { | |
2708 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); | |
2709 | goto err; | |
2710 | } | |
c660ec63 DSH |
2711 | pmslen = (field_size + 7) / 8; |
2712 | pms = OPENSSL_malloc(pmslen); | |
2713 | if (!pms) | |
2714 | goto memerr; | |
2715 | n = ECDH_compute_key(pms, pmslen, srvr_ecpoint, clnt_ecdh, NULL); | |
2716 | if (n <= 0 || pmslen != (size_t)n) { | |
0f113f3e MC |
2717 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); |
2718 | goto err; | |
2719 | } | |
2720 | ||
0f113f3e MC |
2721 | if (ecdh_clnt_cert) { |
2722 | /* Send empty client key exch message */ | |
2723 | n = 0; | |
2724 | } else { | |
2725 | /* | |
2726 | * First check the size of encoding and allocate memory | |
2727 | * accordingly. | |
2728 | */ | |
2729 | encoded_pt_len = | |
2730 | EC_POINT_point2oct(srvr_group, | |
2731 | EC_KEY_get0_public_key(clnt_ecdh), | |
2732 | POINT_CONVERSION_UNCOMPRESSED, | |
2733 | NULL, 0, NULL); | |
2734 | ||
2735 | encodedPoint = (unsigned char *) | |
2736 | OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char)); | |
2737 | bn_ctx = BN_CTX_new(); | |
2738 | if ((encodedPoint == NULL) || (bn_ctx == NULL)) { | |
2739 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2740 | ERR_R_MALLOC_FAILURE); | |
2741 | goto err; | |
2742 | } | |
2743 | ||
2744 | /* Encode the public key */ | |
2745 | n = EC_POINT_point2oct(srvr_group, | |
2746 | EC_KEY_get0_public_key(clnt_ecdh), | |
2747 | POINT_CONVERSION_UNCOMPRESSED, | |
2748 | encodedPoint, encoded_pt_len, bn_ctx); | |
2749 | ||
2750 | *p = n; /* length of encoded point */ | |
2751 | /* Encoded point will be copied here */ | |
2752 | p += 1; | |
2753 | /* copy the point */ | |
16f8d4eb | 2754 | memcpy(p, encodedPoint, n); |
0f113f3e MC |
2755 | /* increment n to account for length field */ |
2756 | n += 1; | |
2757 | } | |
2758 | ||
2759 | /* Free allocated memory */ | |
2760 | BN_CTX_free(bn_ctx); | |
b548a1f1 | 2761 | OPENSSL_free(encodedPoint); |
8fdc3734 | 2762 | EC_KEY_free(clnt_ecdh); |
0f113f3e MC |
2763 | EVP_PKEY_free(srvr_pub_pkey); |
2764 | } | |
10bf4fc2 | 2765 | #endif /* !OPENSSL_NO_EC */ |
0f113f3e MC |
2766 | else if (alg_k & SSL_kGOST) { |
2767 | /* GOST key exchange message creation */ | |
2768 | EVP_PKEY_CTX *pkey_ctx; | |
2769 | X509 *peer_cert; | |
2770 | size_t msglen; | |
2771 | unsigned int md_len; | |
c660ec63 | 2772 | unsigned char shared_ukm[32], tmp[256]; |
0f113f3e MC |
2773 | EVP_MD_CTX *ukm_hash; |
2774 | EVP_PKEY *pub_key; | |
2775 | ||
c660ec63 DSH |
2776 | pmslen = 32; |
2777 | pms = OPENSSL_malloc(pmslen); | |
2778 | if (!pms) | |
2779 | goto memerr; | |
2780 | ||
0f113f3e MC |
2781 | /* |
2782 | * Get server sertificate PKEY and create ctx from it | |
2783 | */ | |
a273c6ee | 2784 | peer_cert = s->session->peer; |
0f113f3e MC |
2785 | if (!peer_cert) { |
2786 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2787 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); | |
2788 | goto err; | |
2789 | } | |
2790 | ||
2791 | pkey_ctx = EVP_PKEY_CTX_new(pub_key = | |
2792 | X509_get_pubkey(peer_cert), NULL); | |
2793 | /* | |
2794 | * If we have send a certificate, and certificate key | |
2795 | * | |
2796 | * * parameters match those of server certificate, use | |
2797 | * certificate key for key exchange | |
2798 | */ | |
2799 | ||
2800 | /* Otherwise, generate ephemeral key pair */ | |
2801 | ||
2802 | EVP_PKEY_encrypt_init(pkey_ctx); | |
2803 | /* Generate session key */ | |
266483d2 MC |
2804 | if (RAND_bytes(pms, pmslen) <= 0) { |
2805 | EVP_PKEY_CTX_free(pkey_ctx); | |
2806 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2807 | ERR_R_INTERNAL_ERROR); | |
2808 | goto err; | |
2809 | }; | |
0f113f3e MC |
2810 | /* |
2811 | * If we have client certificate, use its secret as peer key | |
2812 | */ | |
2813 | if (s->s3->tmp.cert_req && s->cert->key->privatekey) { | |
2814 | if (EVP_PKEY_derive_set_peer | |
2815 | (pkey_ctx, s->cert->key->privatekey) <= 0) { | |
2816 | /* | |
2817 | * If there was an error - just ignore it. Ephemeral key | |
2818 | * * would be used | |
2819 | */ | |
2820 | ERR_clear_error(); | |
2821 | } | |
2822 | } | |
2823 | /* | |
2824 | * Compute shared IV and store it in algorithm-specific context | |
2825 | * data | |
2826 | */ | |
2827 | ukm_hash = EVP_MD_CTX_create(); | |
2828 | EVP_DigestInit(ukm_hash, | |
2829 | EVP_get_digestbynid(NID_id_GostR3411_94)); | |
2830 | EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
2831 | SSL3_RANDOM_SIZE); | |
2832 | EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2833 | SSL3_RANDOM_SIZE); | |
2834 | EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); | |
2835 | EVP_MD_CTX_destroy(ukm_hash); | |
2836 | if (EVP_PKEY_CTX_ctrl | |
2837 | (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8, | |
2838 | shared_ukm) < 0) { | |
2839 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2840 | SSL_R_LIBRARY_BUG); | |
2841 | goto err; | |
2842 | } | |
2843 | /* Make GOST keytransport blob message */ | |
2844 | /* | |
2845 | * Encapsulate it into sequence | |
2846 | */ | |
2847 | *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; | |
2848 | msglen = 255; | |
c660ec63 | 2849 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) < 0) { |
0f113f3e MC |
2850 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, |
2851 | SSL_R_LIBRARY_BUG); | |
2852 | goto err; | |
2853 | } | |
2854 | if (msglen >= 0x80) { | |
2855 | *(p++) = 0x81; | |
2856 | *(p++) = msglen & 0xff; | |
2857 | n = msglen + 3; | |
2858 | } else { | |
2859 | *(p++) = msglen & 0xff; | |
2860 | n = msglen + 2; | |
2861 | } | |
2862 | memcpy(p, tmp, msglen); | |
2863 | /* Check if pubkey from client certificate was used */ | |
2864 | if (EVP_PKEY_CTX_ctrl | |
2865 | (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) { | |
2866 | /* Set flag "skip certificate verify" */ | |
2867 | s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; | |
2868 | } | |
2869 | EVP_PKEY_CTX_free(pkey_ctx); | |
0f113f3e MC |
2870 | EVP_PKEY_free(pub_key); |
2871 | ||
2872 | } | |
edc032b5 | 2873 | #ifndef OPENSSL_NO_SRP |
0f113f3e MC |
2874 | else if (alg_k & SSL_kSRP) { |
2875 | if (s->srp_ctx.A != NULL) { | |
2876 | /* send off the data */ | |
2877 | n = BN_num_bytes(s->srp_ctx.A); | |
2878 | s2n(n, p); | |
2879 | BN_bn2bin(s->srp_ctx.A, p); | |
2880 | n += 2; | |
2881 | } else { | |
2882 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2883 | ERR_R_INTERNAL_ERROR); | |
2884 | goto err; | |
2885 | } | |
b548a1f1 | 2886 | OPENSSL_free(s->session->srp_username); |
0f113f3e MC |
2887 | s->session->srp_username = BUF_strdup(s->srp_ctx.login); |
2888 | if (s->session->srp_username == NULL) { | |
2889 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2890 | ERR_R_MALLOC_FAILURE); | |
2891 | goto err; | |
2892 | } | |
0f113f3e | 2893 | } |
0f113f3e MC |
2894 | #endif |
2895 | else { | |
2896 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2897 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2898 | goto err; | |
2899 | } | |
2900 | ||
7689082b DSH |
2901 | #ifndef OPENSSL_NO_PSK |
2902 | n += pskhdrlen; | |
2903 | #endif | |
2904 | ||
61986d32 | 2905 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) { |
77d514c5 MC |
2906 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
2907 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2908 | goto err; | |
2909 | } | |
2910 | ||
0f113f3e MC |
2911 | s->state = SSL3_ST_CW_KEY_EXCH_B; |
2912 | } | |
2913 | ||
2914 | /* SSL3_ST_CW_KEY_EXCH_B */ | |
c660ec63 DSH |
2915 | n = ssl_do_write(s); |
2916 | #ifndef OPENSSL_NO_SRP | |
2917 | /* Check for SRP */ | |
7689082b | 2918 | if (alg_k & SSL_kSRP) { |
c660ec63 DSH |
2919 | /* |
2920 | * If everything written generate master key: no need to save PMS as | |
57b272b0 | 2921 | * srp_generate_client_master_secret generates it internally. |
c660ec63 DSH |
2922 | */ |
2923 | if (n > 0) { | |
57b272b0 | 2924 | if (!srp_generate_client_master_secret(s)) { |
c660ec63 DSH |
2925 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, |
2926 | ERR_R_INTERNAL_ERROR); | |
2927 | goto err; | |
2928 | } | |
2929 | } | |
2930 | } else | |
2931 | #endif | |
2932 | /* If we haven't written everything save PMS */ | |
2933 | if (n <= 0) { | |
76106e60 DSH |
2934 | s->s3->tmp.pms = pms; |
2935 | s->s3->tmp.pmslen = pmslen; | |
c660ec63 DSH |
2936 | } else { |
2937 | /* If we don't have a PMS restore */ | |
2938 | if (pms == NULL) { | |
76106e60 DSH |
2939 | pms = s->s3->tmp.pms; |
2940 | pmslen = s->s3->tmp.pmslen; | |
c660ec63 | 2941 | } |
7689082b | 2942 | if (pms == NULL && !(alg_k & SSL_kPSK)) { |
c660ec63 DSH |
2943 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
2944 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
2945 | goto err; | |
2946 | } | |
57b272b0 | 2947 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { |
69f68237 MC |
2948 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
2949 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2950 | goto err; | |
2951 | } | |
c660ec63 DSH |
2952 | } |
2953 | return n; | |
2954 | memerr: | |
2955 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2956 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
0f113f3e | 2957 | err: |
4b45c6e5 | 2958 | OPENSSL_clear_free(pms, pmslen); |
76106e60 | 2959 | s->s3->tmp.pms = NULL; |
10bf4fc2 | 2960 | #ifndef OPENSSL_NO_EC |
0f113f3e | 2961 | BN_CTX_free(bn_ctx); |
b548a1f1 | 2962 | OPENSSL_free(encodedPoint); |
8fdc3734 | 2963 | EC_KEY_free(clnt_ecdh); |
0f113f3e | 2964 | EVP_PKEY_free(srvr_pub_pkey); |
7689082b DSH |
2965 | #endif |
2966 | #ifndef OPENSSL_NO_PSK | |
2967 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
2968 | s->s3->tmp.psk = NULL; | |
0f113f3e | 2969 | #endif |
cc273a93 | 2970 | s->state = SSL_ST_ERR; |
0f113f3e MC |
2971 | return (-1); |
2972 | } | |
d02b48c6 | 2973 | |
36d16f8e | 2974 | int ssl3_send_client_verify(SSL *s) |
0f113f3e MC |
2975 | { |
2976 | unsigned char *p; | |
2977 | unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH]; | |
2978 | EVP_PKEY *pkey; | |
2979 | EVP_PKEY_CTX *pctx = NULL; | |
2980 | EVP_MD_CTX mctx; | |
2981 | unsigned u = 0; | |
2982 | unsigned long n; | |
2983 | int j; | |
2984 | ||
2985 | EVP_MD_CTX_init(&mctx); | |
2986 | ||
2987 | if (s->state == SSL3_ST_CW_CERT_VRFY_A) { | |
2988 | p = ssl_handshake_start(s); | |
2989 | pkey = s->cert->key->privatekey; | |
0e1dba93 | 2990 | /* Create context from key and test if sha1 is allowed as digest */ |
0f113f3e MC |
2991 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2992 | EVP_PKEY_sign_init(pctx); | |
2993 | if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1()) > 0) { | |
2994 | if (!SSL_USE_SIGALGS(s)) | |
2995 | s->method->ssl3_enc->cert_verify_mac(s, | |
2996 | NID_sha1, | |
2997 | &(data | |
2998 | [MD5_DIGEST_LENGTH])); | |
2999 | } else { | |
3000 | ERR_clear_error(); | |
3001 | } | |
3002 | /* | |
3003 | * For TLS v1.2 send signature algorithm and signature using agreed | |
3004 | * digest and cached handshake records. | |
3005 | */ | |
3006 | if (SSL_USE_SIGALGS(s)) { | |
3007 | long hdatalen = 0; | |
3008 | void *hdata; | |
d376e57d | 3009 | const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys]; |
0f113f3e MC |
3010 | hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); |
3011 | if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) { | |
3012 | SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); | |
3013 | goto err; | |
3014 | } | |
3015 | p += 2; | |
855a54a9 | 3016 | #ifdef SSL_DEBUG |
0f113f3e MC |
3017 | fprintf(stderr, "Using TLS 1.2 with client alg %s\n", |
3018 | EVP_MD_name(md)); | |
3019 | #endif | |
3020 | if (!EVP_SignInit_ex(&mctx, md, NULL) | |
3021 | || !EVP_SignUpdate(&mctx, hdata, hdatalen) | |
3022 | || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) { | |
3023 | SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_EVP_LIB); | |
3024 | goto err; | |
3025 | } | |
3026 | s2n(u, p); | |
3027 | n = u + 4; | |
124037fd DSH |
3028 | /* Digest cached records and discard handshake buffer */ |
3029 | if (!ssl3_digest_cached_records(s, 0)) | |
0f113f3e MC |
3030 | goto err; |
3031 | } else | |
bc36ee62 | 3032 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
3033 | if (pkey->type == EVP_PKEY_RSA) { |
3034 | s->method->ssl3_enc->cert_verify_mac(s, NID_md5, &(data[0])); | |
3035 | if (RSA_sign(NID_md5_sha1, data, | |
3036 | MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH, | |
3037 | &(p[2]), &u, pkey->pkey.rsa) <= 0) { | |
3038 | SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_RSA_LIB); | |
3039 | goto err; | |
3040 | } | |
3041 | s2n(u, p); | |
3042 | n = u + 2; | |
3043 | } else | |
d02b48c6 | 3044 | #endif |
bc36ee62 | 3045 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3046 | if (pkey->type == EVP_PKEY_DSA) { |
3047 | if (!DSA_sign(pkey->save_type, | |
3048 | &(data[MD5_DIGEST_LENGTH]), | |
3049 | SHA_DIGEST_LENGTH, &(p[2]), | |
3050 | (unsigned int *)&j, pkey->pkey.dsa)) { | |
3051 | SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_DSA_LIB); | |
3052 | goto err; | |
3053 | } | |
3054 | s2n(j, p); | |
3055 | n = j + 2; | |
3056 | } else | |
ea262260 | 3057 | #endif |
10bf4fc2 | 3058 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
3059 | if (pkey->type == EVP_PKEY_EC) { |
3060 | if (!ECDSA_sign(pkey->save_type, | |
3061 | &(data[MD5_DIGEST_LENGTH]), | |
3062 | SHA_DIGEST_LENGTH, &(p[2]), | |
3063 | (unsigned int *)&j, pkey->pkey.ec)) { | |
3064 | SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_ECDSA_LIB); | |
3065 | goto err; | |
3066 | } | |
3067 | s2n(j, p); | |
3068 | n = j + 2; | |
3069 | } else | |
3070 | #endif | |
ade44dcb | 3071 | if (pkey->type == NID_id_GostR3410_2001) { |
0f113f3e MC |
3072 | unsigned char signbuf[64]; |
3073 | int i; | |
3074 | size_t sigsize = 64; | |
3075 | s->method->ssl3_enc->cert_verify_mac(s, | |
3076 | NID_id_GostR3411_94, data); | |
3077 | if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { | |
3078 | SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); | |
3079 | goto err; | |
3080 | } | |
3081 | for (i = 63, j = 0; i >= 0; j++, i--) { | |
3082 | p[2 + j] = signbuf[i]; | |
3083 | } | |
3084 | s2n(j, p); | |
3085 | n = j + 2; | |
3086 | } else { | |
3087 | SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); | |
3088 | goto err; | |
3089 | } | |
61986d32 | 3090 | if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) { |
77d514c5 MC |
3091 | SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); |
3092 | goto err; | |
3093 | } | |
0f113f3e MC |
3094 | s->state = SSL3_ST_CW_CERT_VRFY_B; |
3095 | } | |
3096 | EVP_MD_CTX_cleanup(&mctx); | |
3097 | EVP_PKEY_CTX_free(pctx); | |
3098 | return ssl_do_write(s); | |
3099 | err: | |
3100 | EVP_MD_CTX_cleanup(&mctx); | |
3101 | EVP_PKEY_CTX_free(pctx); | |
cc273a93 | 3102 | s->state = SSL_ST_ERR; |
0f113f3e MC |
3103 | return (-1); |
3104 | } | |
3105 | ||
3106 | /* | |
3107 | * Check a certificate can be used for client authentication. Currently check | |
3108 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3109 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3110 | */ |
3111 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e MC |
3112 | { |
3113 | unsigned long alg_k; | |
3114 | if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey) | |
3115 | return 0; | |
3116 | /* If no suitable signature algorithm can't use certificate */ | |
d376e57d | 3117 | if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys]) |
0f113f3e MC |
3118 | return 0; |
3119 | /* | |
3120 | * If strict mode check suitability of chain before using it. This also | |
3121 | * adjusts suite B digest if necessary. | |
3122 | */ | |
3123 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3124 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3125 | return 0; | |
3126 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
3127 | /* See if we can use client certificate for fixed DH */ | |
3128 | if (alg_k & (SSL_kDHr | SSL_kDHd)) { | |
a273c6ee | 3129 | int i = s->session->peer_type; |
0f113f3e MC |
3130 | EVP_PKEY *clkey = NULL, *spkey = NULL; |
3131 | clkey = s->cert->key->privatekey; | |
3132 | /* If client key not DH assume it can be used */ | |
3133 | if (EVP_PKEY_id(clkey) != EVP_PKEY_DH) | |
3134 | return 1; | |
3135 | if (i >= 0) | |
a273c6ee | 3136 | spkey = X509_get_pubkey(s->session->peer); |
0f113f3e MC |
3137 | if (spkey) { |
3138 | /* Compare server and client parameters */ | |
3139 | i = EVP_PKEY_cmp_parameters(clkey, spkey); | |
3140 | EVP_PKEY_free(spkey); | |
3141 | if (i != 1) | |
3142 | return 0; | |
3143 | } | |
3144 | s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; | |
3145 | } | |
3146 | return 1; | |
3147 | } | |
0d609395 | 3148 | |
36d16f8e | 3149 | int ssl3_send_client_certificate(SSL *s) |
0f113f3e MC |
3150 | { |
3151 | X509 *x509 = NULL; | |
3152 | EVP_PKEY *pkey = NULL; | |
3153 | int i; | |
3154 | ||
3155 | if (s->state == SSL3_ST_CW_CERT_A) { | |
3156 | /* Let cert callback update client certificates if required */ | |
3157 | if (s->cert->cert_cb) { | |
3158 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3159 | if (i < 0) { | |
3160 | s->rwstate = SSL_X509_LOOKUP; | |
3161 | return -1; | |
3162 | } | |
3163 | if (i == 0) { | |
3164 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
cc273a93 | 3165 | s->state = SSL_ST_ERR; |
0f113f3e MC |
3166 | return 0; |
3167 | } | |
3168 | s->rwstate = SSL_NOTHING; | |
3169 | } | |
3170 | if (ssl3_check_client_certificate(s)) | |
3171 | s->state = SSL3_ST_CW_CERT_C; | |
3172 | else | |
3173 | s->state = SSL3_ST_CW_CERT_B; | |
3174 | } | |
3175 | ||
3176 | /* We need to get a client cert */ | |
3177 | if (s->state == SSL3_ST_CW_CERT_B) { | |
3178 | /* | |
3179 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3180 | * return(-1); We then get retied later | |
3181 | */ | |
3182 | i = 0; | |
3183 | i = ssl_do_client_cert_cb(s, &x509, &pkey); | |
3184 | if (i < 0) { | |
3185 | s->rwstate = SSL_X509_LOOKUP; | |
3186 | return (-1); | |
3187 | } | |
3188 | s->rwstate = SSL_NOTHING; | |
3189 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
3190 | s->state = SSL3_ST_CW_CERT_B; | |
3191 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) | |
3192 | i = 0; | |
3193 | } else if (i == 1) { | |
3194 | i = 0; | |
3195 | SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, | |
3196 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); | |
3197 | } | |
3198 | ||
222561fe | 3199 | X509_free(x509); |
25aaa98a | 3200 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3201 | if (i && !ssl3_check_client_certificate(s)) |
3202 | i = 0; | |
3203 | if (i == 0) { | |
3204 | if (s->version == SSL3_VERSION) { | |
3205 | s->s3->tmp.cert_req = 0; | |
3206 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
3207 | return (1); | |
3208 | } else { | |
3209 | s->s3->tmp.cert_req = 2; | |
124037fd | 3210 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 DSH |
3211 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
3212 | s->state = SSL_ST_ERR; | |
3213 | return 0; | |
3214 | } | |
0f113f3e MC |
3215 | } |
3216 | } | |
3217 | ||
3218 | /* Ok, we have a cert */ | |
3219 | s->state = SSL3_ST_CW_CERT_C; | |
3220 | } | |
3221 | ||
3222 | if (s->state == SSL3_ST_CW_CERT_C) { | |
3223 | s->state = SSL3_ST_CW_CERT_D; | |
3224 | if (!ssl3_output_cert_chain(s, | |
3225 | (s->s3->tmp.cert_req == | |
3226 | 2) ? NULL : s->cert->key)) { | |
3227 | SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
3228 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
cc273a93 | 3229 | s->state = SSL_ST_ERR; |
0f113f3e MC |
3230 | return 0; |
3231 | } | |
3232 | } | |
3233 | /* SSL3_ST_CW_CERT_D */ | |
3234 | return ssl_do_write(s); | |
3235 | } | |
3236 | ||
3237 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 3238 | |
36d16f8e | 3239 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e MC |
3240 | { |
3241 | int i, idx; | |
3242 | long alg_k, alg_a; | |
3243 | EVP_PKEY *pkey = NULL; | |
ac38115c | 3244 | int pkey_bits; |
bc36ee62 | 3245 | #ifndef OPENSSL_NO_RSA |
0f113f3e | 3246 | RSA *rsa; |
79df9d62 | 3247 | #endif |
bc36ee62 | 3248 | #ifndef OPENSSL_NO_DH |
0f113f3e | 3249 | DH *dh; |
79df9d62 | 3250 | #endif |
26c79d56 | 3251 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 3252 | |
0f113f3e MC |
3253 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3254 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3255 | |
0f113f3e | 3256 | /* we don't have a certificate */ |
55a9a16f | 3257 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 3258 | return (1); |
bc36ee62 | 3259 | #ifndef OPENSSL_NO_RSA |
8d92c1f8 | 3260 | rsa = s->s3->peer_rsa_tmp; |
79df9d62 | 3261 | #endif |
bc36ee62 | 3262 | #ifndef OPENSSL_NO_DH |
8d92c1f8 | 3263 | dh = s->s3->peer_dh_tmp; |
79df9d62 | 3264 | #endif |
d02b48c6 | 3265 | |
0f113f3e | 3266 | /* This is the passed certificate */ |
d02b48c6 | 3267 | |
a273c6ee | 3268 | idx = s->session->peer_type; |
10bf4fc2 | 3269 | #ifndef OPENSSL_NO_EC |
0f113f3e | 3270 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 3271 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
3272 | /* check failed */ |
3273 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3274 | goto f_err; | |
3275 | } else { | |
3276 | return 1; | |
3277 | } | |
3278 | } else if (alg_a & SSL_aECDSA) { | |
3279 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3280 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
3281 | goto f_err; | |
3282 | } else if (alg_k & (SSL_kECDHr | SSL_kECDHe)) { | |
3283 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_ECDH_CERT); | |
3284 | goto f_err; | |
3285 | } | |
3286 | #endif | |
a273c6ee | 3287 | pkey = X509_get_pubkey(s->session->peer); |
ac38115c | 3288 | pkey_bits = EVP_PKEY_bits(pkey); |
a273c6ee | 3289 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
3290 | EVP_PKEY_free(pkey); |
3291 | ||
3292 | /* Check that we have a certificate if we require one */ | |
3293 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
3294 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3295 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
3296 | goto f_err; | |
3297 | } | |
bc36ee62 | 3298 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3299 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
3300 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3301 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
3302 | goto f_err; | |
3303 | } | |
d02b48c6 | 3304 | #endif |
bc36ee62 | 3305 | #ifndef OPENSSL_NO_RSA |
7689082b | 3306 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
26c79d56 KR |
3307 | if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && |
3308 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3309 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3310 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3311 | goto f_err; | |
3312 | } else if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) { | |
3313 | if (pkey_bits <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { | |
3314 | if (!has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
3315 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3316 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3317 | goto f_err; | |
3318 | } | |
3319 | if (rsa != NULL) { | |
3320 | /* server key exchange is not allowed. */ | |
3321 | al = SSL_AD_INTERNAL_ERROR; | |
3322 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
3323 | goto f_err; | |
3324 | } | |
3325 | } | |
3326 | } | |
0f113f3e | 3327 | } |
79df9d62 | 3328 | #endif |
bc36ee62 | 3329 | #ifndef OPENSSL_NO_DH |
26c79d56 KR |
3330 | if ((alg_k & SSL_kDHE) && (dh == NULL)) { |
3331 | al = SSL_AD_INTERNAL_ERROR; | |
3332 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
3333 | goto f_err; |
3334 | } else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) && | |
3335 | !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) { | |
3336 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3337 | SSL_R_MISSING_DH_RSA_CERT); | |
3338 | goto f_err; | |
3339 | } | |
3340 | # ifndef OPENSSL_NO_DSA | |
3341 | else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) && | |
3342 | !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) { | |
3343 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3344 | SSL_R_MISSING_DH_DSA_CERT); | |
3345 | goto f_err; | |
3346 | } | |
3347 | # endif | |
d02b48c6 RE |
3348 | #endif |
3349 | ||
ac38115c KR |
3350 | if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && |
3351 | pkey_bits > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { | |
bc36ee62 | 3352 | #ifndef OPENSSL_NO_RSA |
0f113f3e | 3353 | if (alg_k & SSL_kRSA) { |
26c79d56 KR |
3354 | if (rsa == NULL) { |
3355 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3356 | SSL_R_MISSING_EXPORT_TMP_RSA_KEY); | |
3357 | goto f_err; | |
3358 | } else if (RSA_bits(rsa) > | |
0f113f3e | 3359 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { |
26c79d56 KR |
3360 | /* We have a temporary RSA key but it's too large. */ |
3361 | al = SSL_AD_EXPORT_RESTRICTION; | |
0f113f3e MC |
3362 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, |
3363 | SSL_R_MISSING_EXPORT_TMP_RSA_KEY); | |
3364 | goto f_err; | |
3365 | } | |
3366 | } else | |
d02b48c6 | 3367 | #endif |
bc36ee62 | 3368 | #ifndef OPENSSL_NO_DH |
26c79d56 KR |
3369 | if (alg_k & SSL_kDHE) { |
3370 | if (DH_bits(dh) > | |
0f113f3e | 3371 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { |
26c79d56 KR |
3372 | /* We have a temporary DH key but it's too large. */ |
3373 | al = SSL_AD_EXPORT_RESTRICTION; | |
0f113f3e MC |
3374 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, |
3375 | SSL_R_MISSING_EXPORT_TMP_DH_KEY); | |
3376 | goto f_err; | |
3377 | } | |
26c79d56 KR |
3378 | } else if (alg_k & (SSL_kDHr | SSL_kDHd)) { |
3379 | /* The cert should have had an export DH key. */ | |
3380 | al = SSL_AD_EXPORT_RESTRICTION; | |
3381 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3382 | SSL_R_MISSING_EXPORT_TMP_DH_KEY); | |
3383 | goto f_err; | |
0f113f3e MC |
3384 | } else |
3385 | #endif | |
3386 | { | |
3387 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3388 | SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); | |
3389 | goto f_err; | |
3390 | } | |
3391 | } | |
3392 | return (1); | |
3393 | f_err: | |
26c79d56 | 3394 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
3395 | return (0); |
3396 | } | |
3397 | ||
3398 | /* | |
6e3d0153 EK |
3399 | * Normally, we can tell if the server is resuming the session from |
3400 | * the session ID. EAP-FAST (RFC 4851), however, relies on the next server | |
3401 | * message after the ServerHello to determine if the server is resuming. | |
3402 | * Therefore, we allow EAP-FAST to peek ahead. | |
657da85e MC |
3403 | * ssl3_check_change returns 1 if we are resuming from an external |
3404 | * pre-shared secret, we have a "ticket" and the next server message | |
3405 | * is CCS; and 0 otherwise. It returns -1 upon an error. | |
6434abbf | 3406 | */ |
657da85e | 3407 | static int ssl3_check_change(SSL *s) |
6e3d0153 EK |
3408 | { |
3409 | int ok = 0; | |
3410 | ||
3411 | if (s->version < TLS1_VERSION || !s->tls_session_secret_cb || | |
3412 | !s->session->tlsext_tick) | |
3413 | return 0; | |
3414 | ||
6e3d0153 EK |
3415 | /* |
3416 | * This function is called when we might get a Certificate message instead, | |
3417 | * so permit appropriate message length. | |
3418 | * We ignore the return value as we're only interested in the message type | |
3419 | * and not its length. | |
3420 | */ | |
3421 | s->method->ssl_get_message(s, | |
3422 | SSL3_ST_CR_CERT_A, | |
3423 | SSL3_ST_CR_CERT_B, | |
3424 | -1, s->max_cert_list, &ok); | |
6e3d0153 EK |
3425 | |
3426 | if (!ok) | |
3427 | return -1; | |
3428 | ||
3429 | s->s3->tmp.reuse_message = 1; | |
3430 | ||
657da85e | 3431 | if (s->s3->tmp.message_type == SSL3_MT_CHANGE_CIPHER_SPEC) |
6e3d0153 EK |
3432 | return 1; |
3433 | ||
6e3d0153 EK |
3434 | return 0; |
3435 | } | |
6434abbf | 3436 | |
e481f9b9 | 3437 | #ifndef OPENSSL_NO_NEXTPROTONEG |
ee2ffc27 | 3438 | int ssl3_send_next_proto(SSL *s) |
0f113f3e MC |
3439 | { |
3440 | unsigned int len, padding_len; | |
3441 | unsigned char *d; | |
3442 | ||
3443 | if (s->state == SSL3_ST_CW_NEXT_PROTO_A) { | |
3444 | len = s->next_proto_negotiated_len; | |
3445 | padding_len = 32 - ((len + 2) % 32); | |
3446 | d = (unsigned char *)s->init_buf->data; | |
3447 | d[4] = len; | |
3448 | memcpy(d + 5, s->next_proto_negotiated, len); | |
3449 | d[5 + len] = padding_len; | |
3450 | memset(d + 6 + len, 0, padding_len); | |
3451 | *(d++) = SSL3_MT_NEXT_PROTO; | |
3452 | l2n3(2 + len + padding_len, d); | |
3453 | s->state = SSL3_ST_CW_NEXT_PROTO_B; | |
3454 | s->init_num = 4 + 2 + len + padding_len; | |
3455 | s->init_off = 0; | |
3456 | } | |
3457 | ||
3458 | return ssl3_do_write(s, SSL3_RT_HANDSHAKE); | |
3459 | } | |
6434abbf | 3460 | #endif |
368888bc DSH |
3461 | |
3462 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) | |
0f113f3e MC |
3463 | { |
3464 | int i = 0; | |
368888bc | 3465 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3466 | if (s->ctx->client_cert_engine) { |
3467 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3468 | SSL_get_client_CA_list(s), | |
3469 | px509, ppkey, NULL, NULL, NULL); | |
3470 | if (i != 0) | |
3471 | return i; | |
3472 | } | |
3473 | #endif | |
3474 | if (s->ctx->client_cert_cb) | |
3475 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3476 | return i; | |
3477 | } | |
d45ba43d MC |
3478 | |
3479 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, | |
3480 | unsigned char *p, | |
3481 | int (*put_cb) (const SSL_CIPHER *, | |
3482 | unsigned char *)) | |
3483 | { | |
3484 | int i, j = 0; | |
3485 | SSL_CIPHER *c; | |
3486 | unsigned char *q; | |
3487 | int empty_reneg_info_scsv = !s->renegotiate; | |
3488 | /* Set disabled masks for this session */ | |
3489 | ssl_set_client_disabled(s); | |
3490 | ||
3491 | if (sk == NULL) | |
3492 | return (0); | |
3493 | q = p; | |
3494 | if (put_cb == NULL) | |
3495 | put_cb = s->method->put_cipher_by_char; | |
3496 | ||
3497 | for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { | |
3498 | c = sk_SSL_CIPHER_value(sk, i); | |
3499 | /* Skip disabled ciphers */ | |
3500 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) | |
3501 | continue; | |
3502 | #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL | |
3503 | if (c->id == SSL3_CK_SCSV) { | |
3504 | if (!empty_reneg_info_scsv) | |
3505 | continue; | |
3506 | else | |
3507 | empty_reneg_info_scsv = 0; | |
3508 | } | |
3509 | #endif | |
3510 | j = put_cb(c, p); | |
3511 | p += j; | |
3512 | } | |
3513 | /* | |
3514 | * If p == q, no ciphers; caller indicates an error. Otherwise, add | |
3515 | * applicable SCSVs. | |
3516 | */ | |
3517 | if (p != q) { | |
3518 | if (empty_reneg_info_scsv) { | |
3519 | static SSL_CIPHER scsv = { | |
3520 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3521 | }; | |
3522 | j = put_cb(&scsv, p); | |
3523 | p += j; | |
3524 | #ifdef OPENSSL_RI_DEBUG | |
3525 | fprintf(stderr, | |
3526 | "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n"); | |
3527 | #endif | |
3528 | } | |
3529 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3530 | static SSL_CIPHER scsv = { | |
3531 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3532 | }; | |
3533 | j = put_cb(&scsv, p); | |
3534 | p += j; | |
3535 | } | |
3536 | } | |
3537 | ||
3538 | return (p - q); | |
3539 | } |