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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 LJ |
152 | #include "ssl_locl.h" |
153 | #include "kssl_lcl.h" | |
ec577822 BM |
154 | #include <openssl/buffer.h> |
155 | #include <openssl/rand.h> | |
156 | #include <openssl/objects.h> | |
157 | #include <openssl/evp.h> | |
dbad1690 | 158 | #include <openssl/md5.h> |
3eeaab4b | 159 | #ifndef OPENSSL_NO_DH |
0f113f3e | 160 | # include <openssl/dh.h> |
3eeaab4b | 161 | #endif |
d095b68d | 162 | #include <openssl/bn.h> |
368888bc | 163 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e | 164 | # include <openssl/engine.h> |
368888bc | 165 | #endif |
f9b3bff6 | 166 | |
0f113f3e | 167 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b); |
6e3d0153 EK |
168 | #ifndef OPENSSL_NO_TLSEXT |
169 | static int ssl3_check_finished(SSL *s); | |
170 | #endif | |
ea262260 | 171 | |
3881d810 | 172 | #ifndef OPENSSL_NO_SSL3_METHOD |
4ebb342f | 173 | static const SSL_METHOD *ssl3_get_client_method(int ver) |
0f113f3e MC |
174 | { |
175 | if (ver == SSL3_VERSION) | |
176 | return (SSLv3_client_method()); | |
177 | else | |
178 | return (NULL); | |
179 | } | |
d02b48c6 | 180 | |
f3b656b2 | 181 | IMPLEMENT_ssl3_meth_func(SSLv3_client_method, |
0f113f3e MC |
182 | ssl_undefined_function, |
183 | ssl3_connect, ssl3_get_client_method) | |
3881d810 | 184 | #endif |
6b691a5c | 185 | int ssl3_connect(SSL *s) |
0f113f3e MC |
186 | { |
187 | BUF_MEM *buf = NULL; | |
188 | unsigned long Time = (unsigned long)time(NULL); | |
189 | void (*cb) (const SSL *ssl, int type, int val) = NULL; | |
190 | int ret = -1; | |
191 | int new_state, state, skip = 0; | |
d02b48c6 | 192 | |
0f113f3e MC |
193 | RAND_add(&Time, sizeof(Time), 0); |
194 | ERR_clear_error(); | |
195 | clear_sys_error(); | |
4817504d | 196 | |
0f113f3e MC |
197 | if (s->info_callback != NULL) |
198 | cb = s->info_callback; | |
199 | else if (s->ctx->info_callback != NULL) | |
200 | cb = s->ctx->info_callback; | |
201 | ||
202 | s->in_handshake++; | |
69f68237 | 203 | if (!SSL_in_init(s) || SSL_in_before(s)) { |
61986d32 | 204 | if (!SSL_clear(s)) |
69f68237 MC |
205 | return -1; |
206 | } | |
0f113f3e MC |
207 | |
208 | #ifndef OPENSSL_NO_HEARTBEATS | |
209 | /* | |
210 | * If we're awaiting a HeartbeatResponse, pretend we already got and | |
211 | * don't await it anymore, because Heartbeats don't make sense during | |
212 | * handshakes anyway. | |
213 | */ | |
214 | if (s->tlsext_hb_pending) { | |
215 | s->tlsext_hb_pending = 0; | |
216 | s->tlsext_hb_seq++; | |
217 | } | |
218 | #endif | |
219 | ||
220 | for (;;) { | |
221 | state = s->state; | |
222 | ||
223 | switch (s->state) { | |
224 | case SSL_ST_RENEGOTIATE: | |
225 | s->renegotiate = 1; | |
226 | s->state = SSL_ST_CONNECT; | |
227 | s->ctx->stats.sess_connect_renegotiate++; | |
228 | /* break */ | |
229 | case SSL_ST_BEFORE: | |
230 | case SSL_ST_CONNECT: | |
231 | case SSL_ST_BEFORE | SSL_ST_CONNECT: | |
232 | case SSL_ST_OK | SSL_ST_CONNECT: | |
233 | ||
234 | s->server = 0; | |
235 | if (cb != NULL) | |
236 | cb(s, SSL_CB_HANDSHAKE_START, 1); | |
237 | ||
238 | if ((s->version & 0xff00) != 0x0300) { | |
239 | SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR); | |
cc273a93 | 240 | s->state = SSL_ST_ERR; |
0f113f3e MC |
241 | ret = -1; |
242 | goto end; | |
243 | } | |
244 | ||
245 | if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) { | |
246 | SSLerr(SSL_F_SSL3_CONNECT, SSL_R_VERSION_TOO_LOW); | |
247 | return -1; | |
248 | } | |
249 | ||
250 | /* s->version=SSL3_VERSION; */ | |
251 | s->type = SSL_ST_CONNECT; | |
252 | ||
253 | if (s->init_buf == NULL) { | |
254 | if ((buf = BUF_MEM_new()) == NULL) { | |
255 | ret = -1; | |
cc273a93 | 256 | s->state = SSL_ST_ERR; |
0f113f3e MC |
257 | goto end; |
258 | } | |
259 | if (!BUF_MEM_grow(buf, SSL3_RT_MAX_PLAIN_LENGTH)) { | |
260 | ret = -1; | |
cc273a93 | 261 | s->state = SSL_ST_ERR; |
0f113f3e MC |
262 | goto end; |
263 | } | |
264 | s->init_buf = buf; | |
265 | buf = NULL; | |
266 | } | |
267 | ||
268 | if (!ssl3_setup_buffers(s)) { | |
269 | ret = -1; | |
270 | goto end; | |
271 | } | |
272 | ||
273 | /* setup buffing BIO */ | |
274 | if (!ssl_init_wbio_buffer(s, 0)) { | |
275 | ret = -1; | |
cc273a93 | 276 | s->state = SSL_ST_ERR; |
0f113f3e MC |
277 | goto end; |
278 | } | |
279 | ||
280 | /* don't push the buffering BIO quite yet */ | |
281 | ||
282 | ssl3_init_finished_mac(s); | |
283 | ||
284 | s->state = SSL3_ST_CW_CLNT_HELLO_A; | |
285 | s->ctx->stats.sess_connect++; | |
286 | s->init_num = 0; | |
287 | s->s3->flags &= ~SSL3_FLAGS_CCS_OK; | |
288 | /* | |
289 | * Should have been reset by ssl3_get_finished, too. | |
290 | */ | |
291 | s->s3->change_cipher_spec = 0; | |
292 | break; | |
293 | ||
294 | case SSL3_ST_CW_CLNT_HELLO_A: | |
295 | case SSL3_ST_CW_CLNT_HELLO_B: | |
296 | ||
297 | s->shutdown = 0; | |
298 | ret = ssl3_client_hello(s); | |
299 | if (ret <= 0) | |
300 | goto end; | |
301 | s->state = SSL3_ST_CR_SRVR_HELLO_A; | |
302 | s->init_num = 0; | |
303 | ||
304 | /* turn on buffering for the next lot of output */ | |
305 | if (s->bbio != s->wbio) | |
306 | s->wbio = BIO_push(s->bbio, s->wbio); | |
307 | ||
308 | break; | |
309 | ||
310 | case SSL3_ST_CR_SRVR_HELLO_A: | |
311 | case SSL3_ST_CR_SRVR_HELLO_B: | |
312 | ret = ssl3_get_server_hello(s); | |
313 | if (ret <= 0) | |
314 | goto end; | |
315 | ||
316 | if (s->hit) { | |
317 | s->state = SSL3_ST_CR_FINISHED_A; | |
c519e89f | 318 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
319 | if (s->tlsext_ticket_expected) { |
320 | /* receive renewed session ticket */ | |
321 | s->state = SSL3_ST_CR_SESSION_TICKET_A; | |
322 | } | |
323 | #endif | |
324 | } else { | |
325 | s->state = SSL3_ST_CR_CERT_A; | |
326 | } | |
327 | s->init_num = 0; | |
328 | break; | |
329 | case SSL3_ST_CR_CERT_A: | |
330 | case SSL3_ST_CR_CERT_B: | |
6e3d0153 EK |
331 | #ifndef OPENSSL_NO_TLSEXT |
332 | /* Noop (ret = 0) for everything but EAP-FAST. */ | |
333 | ret = ssl3_check_finished(s); | |
334 | if (ret < 0) | |
335 | goto end; | |
336 | if (ret == 1) { | |
337 | s->hit = 1; | |
338 | s->state = SSL3_ST_CR_FINISHED_A; | |
339 | s->init_num = 0; | |
340 | break; | |
341 | } | |
342 | #endif | |
0f113f3e MC |
343 | /* Check if it is anon DH/ECDH, SRP auth */ |
344 | /* or PSK */ | |
345 | if (! | |
346 | (s->s3->tmp. | |
347 | new_cipher->algorithm_auth & (SSL_aNULL | SSL_aSRP)) | |
348 | && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
349 | ret = ssl3_get_server_certificate(s); | |
350 | if (ret <= 0) | |
351 | goto end; | |
67c8e7f4 | 352 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
353 | if (s->tlsext_status_expected) |
354 | s->state = SSL3_ST_CR_CERT_STATUS_A; | |
355 | else | |
356 | s->state = SSL3_ST_CR_KEY_EXCH_A; | |
357 | } else { | |
358 | skip = 1; | |
359 | s->state = SSL3_ST_CR_KEY_EXCH_A; | |
360 | } | |
67c8e7f4 | 361 | #else |
0f113f3e MC |
362 | } else |
363 | skip = 1; | |
364 | ||
365 | s->state = SSL3_ST_CR_KEY_EXCH_A; | |
366 | #endif | |
367 | s->init_num = 0; | |
368 | break; | |
369 | ||
370 | case SSL3_ST_CR_KEY_EXCH_A: | |
371 | case SSL3_ST_CR_KEY_EXCH_B: | |
372 | ret = ssl3_get_key_exchange(s); | |
373 | if (ret <= 0) | |
374 | goto end; | |
375 | s->state = SSL3_ST_CR_CERT_REQ_A; | |
376 | s->init_num = 0; | |
377 | ||
378 | /* | |
379 | * at this point we check that we have the required stuff from | |
380 | * the server | |
381 | */ | |
382 | if (!ssl3_check_cert_and_algorithm(s)) { | |
383 | ret = -1; | |
cc273a93 | 384 | s->state = SSL_ST_ERR; |
0f113f3e MC |
385 | goto end; |
386 | } | |
387 | break; | |
388 | ||
389 | case SSL3_ST_CR_CERT_REQ_A: | |
390 | case SSL3_ST_CR_CERT_REQ_B: | |
391 | ret = ssl3_get_certificate_request(s); | |
392 | if (ret <= 0) | |
393 | goto end; | |
394 | s->state = SSL3_ST_CR_SRVR_DONE_A; | |
395 | s->init_num = 0; | |
396 | break; | |
397 | ||
398 | case SSL3_ST_CR_SRVR_DONE_A: | |
399 | case SSL3_ST_CR_SRVR_DONE_B: | |
400 | ret = ssl3_get_server_done(s); | |
401 | if (ret <= 0) | |
402 | goto end; | |
edc032b5 | 403 | #ifndef OPENSSL_NO_SRP |
0f113f3e MC |
404 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { |
405 | if ((ret = SRP_Calc_A_param(s)) <= 0) { | |
406 | SSLerr(SSL_F_SSL3_CONNECT, SSL_R_SRP_A_CALC); | |
407 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
cc273a93 | 408 | s->state = SSL_ST_ERR; |
0f113f3e MC |
409 | goto end; |
410 | } | |
411 | } | |
412 | #endif | |
413 | if (s->s3->tmp.cert_req) | |
414 | s->state = SSL3_ST_CW_CERT_A; | |
415 | else | |
416 | s->state = SSL3_ST_CW_KEY_EXCH_A; | |
417 | s->init_num = 0; | |
418 | ||
419 | break; | |
420 | ||
421 | case SSL3_ST_CW_CERT_A: | |
422 | case SSL3_ST_CW_CERT_B: | |
423 | case SSL3_ST_CW_CERT_C: | |
424 | case SSL3_ST_CW_CERT_D: | |
425 | ret = ssl3_send_client_certificate(s); | |
426 | if (ret <= 0) | |
427 | goto end; | |
428 | s->state = SSL3_ST_CW_KEY_EXCH_A; | |
429 | s->init_num = 0; | |
430 | break; | |
431 | ||
432 | case SSL3_ST_CW_KEY_EXCH_A: | |
433 | case SSL3_ST_CW_KEY_EXCH_B: | |
434 | ret = ssl3_send_client_key_exchange(s); | |
435 | if (ret <= 0) | |
436 | goto end; | |
437 | /* | |
438 | * EAY EAY EAY need to check for DH fix cert sent back | |
439 | */ | |
440 | /* | |
441 | * For TLS, cert_req is set to 2, so a cert chain of nothing is | |
442 | * sent, but no verify packet is sent | |
443 | */ | |
444 | /* | |
445 | * XXX: For now, we do not support client authentication in ECDH | |
446 | * cipher suites with ECDH (rather than ECDSA) certificates. We | |
447 | * need to skip the certificate verify message when client's | |
448 | * ECDH public key is sent inside the client certificate. | |
449 | */ | |
450 | if (s->s3->tmp.cert_req == 1) { | |
451 | s->state = SSL3_ST_CW_CERT_VRFY_A; | |
452 | } else { | |
453 | s->state = SSL3_ST_CW_CHANGE_A; | |
454 | } | |
455 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
456 | s->state = SSL3_ST_CW_CHANGE_A; | |
457 | } | |
458 | ||
459 | s->init_num = 0; | |
460 | break; | |
461 | ||
462 | case SSL3_ST_CW_CERT_VRFY_A: | |
463 | case SSL3_ST_CW_CERT_VRFY_B: | |
464 | ret = ssl3_send_client_verify(s); | |
465 | if (ret <= 0) | |
466 | goto end; | |
467 | s->state = SSL3_ST_CW_CHANGE_A; | |
468 | s->init_num = 0; | |
469 | break; | |
470 | ||
471 | case SSL3_ST_CW_CHANGE_A: | |
472 | case SSL3_ST_CW_CHANGE_B: | |
473 | ret = ssl3_send_change_cipher_spec(s, | |
474 | SSL3_ST_CW_CHANGE_A, | |
475 | SSL3_ST_CW_CHANGE_B); | |
476 | if (ret <= 0) | |
477 | goto end; | |
ee2ffc27 | 478 | |
bf48836c | 479 | #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) |
0f113f3e | 480 | s->state = SSL3_ST_CW_FINISHED_A; |
ee2ffc27 | 481 | #else |
0f113f3e MC |
482 | if (s->s3->next_proto_neg_seen) |
483 | s->state = SSL3_ST_CW_NEXT_PROTO_A; | |
484 | else | |
485 | s->state = SSL3_ST_CW_FINISHED_A; | |
ee2ffc27 | 486 | #endif |
0f113f3e | 487 | s->init_num = 0; |
d02b48c6 | 488 | |
0f113f3e | 489 | s->session->cipher = s->s3->tmp.new_cipher; |
09b6c2ef | 490 | #ifdef OPENSSL_NO_COMP |
0f113f3e | 491 | s->session->compress_meth = 0; |
09b6c2ef | 492 | #else |
0f113f3e MC |
493 | if (s->s3->tmp.new_compression == NULL) |
494 | s->session->compress_meth = 0; | |
495 | else | |
496 | s->session->compress_meth = s->s3->tmp.new_compression->id; | |
09b6c2ef | 497 | #endif |
0f113f3e MC |
498 | if (!s->method->ssl3_enc->setup_key_block(s)) { |
499 | ret = -1; | |
cc273a93 | 500 | s->state = SSL_ST_ERR; |
0f113f3e MC |
501 | goto end; |
502 | } | |
d02b48c6 | 503 | |
0f113f3e MC |
504 | if (!s->method->ssl3_enc->change_cipher_state(s, |
505 | SSL3_CHANGE_CIPHER_CLIENT_WRITE)) | |
506 | { | |
507 | ret = -1; | |
cc273a93 | 508 | s->state = SSL_ST_ERR; |
0f113f3e MC |
509 | goto end; |
510 | } | |
d02b48c6 | 511 | |
0f113f3e | 512 | break; |
d02b48c6 | 513 | |
bf48836c | 514 | #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) |
0f113f3e MC |
515 | case SSL3_ST_CW_NEXT_PROTO_A: |
516 | case SSL3_ST_CW_NEXT_PROTO_B: | |
517 | ret = ssl3_send_next_proto(s); | |
518 | if (ret <= 0) | |
519 | goto end; | |
520 | s->state = SSL3_ST_CW_FINISHED_A; | |
521 | break; | |
522 | #endif | |
523 | ||
524 | case SSL3_ST_CW_FINISHED_A: | |
525 | case SSL3_ST_CW_FINISHED_B: | |
526 | ret = ssl3_send_finished(s, | |
527 | SSL3_ST_CW_FINISHED_A, | |
528 | SSL3_ST_CW_FINISHED_B, | |
529 | s->method-> | |
530 | ssl3_enc->client_finished_label, | |
531 | s->method-> | |
532 | ssl3_enc->client_finished_label_len); | |
533 | if (ret <= 0) | |
534 | goto end; | |
535 | s->state = SSL3_ST_CW_FLUSH; | |
536 | ||
537 | /* clear flags */ | |
538 | s->s3->flags &= ~SSL3_FLAGS_POP_BUFFER; | |
539 | if (s->hit) { | |
540 | s->s3->tmp.next_state = SSL_ST_OK; | |
541 | if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) { | |
542 | s->state = SSL_ST_OK; | |
543 | s->s3->flags |= SSL3_FLAGS_POP_BUFFER; | |
544 | s->s3->delay_buf_pop_ret = 0; | |
545 | } | |
546 | } else { | |
6434abbf | 547 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
548 | /* |
549 | * Allow NewSessionTicket if ticket expected | |
550 | */ | |
551 | if (s->tlsext_ticket_expected) | |
552 | s->s3->tmp.next_state = SSL3_ST_CR_SESSION_TICKET_A; | |
553 | else | |
6434abbf DSH |
554 | #endif |
555 | ||
0f113f3e MC |
556 | s->s3->tmp.next_state = SSL3_ST_CR_FINISHED_A; |
557 | } | |
558 | s->init_num = 0; | |
559 | break; | |
d02b48c6 | 560 | |
0f113f3e MC |
561 | #ifndef OPENSSL_NO_TLSEXT |
562 | case SSL3_ST_CR_SESSION_TICKET_A: | |
563 | case SSL3_ST_CR_SESSION_TICKET_B: | |
564 | ret = ssl3_get_new_session_ticket(s); | |
565 | if (ret <= 0) | |
566 | goto end; | |
567 | s->state = SSL3_ST_CR_FINISHED_A; | |
568 | s->init_num = 0; | |
569 | break; | |
570 | ||
571 | case SSL3_ST_CR_CERT_STATUS_A: | |
572 | case SSL3_ST_CR_CERT_STATUS_B: | |
573 | ret = ssl3_get_cert_status(s); | |
574 | if (ret <= 0) | |
575 | goto end; | |
576 | s->state = SSL3_ST_CR_KEY_EXCH_A; | |
577 | s->init_num = 0; | |
578 | break; | |
579 | #endif | |
580 | ||
581 | case SSL3_ST_CR_FINISHED_A: | |
582 | case SSL3_ST_CR_FINISHED_B: | |
6e3d0153 EK |
583 | if (!s->s3->change_cipher_spec) |
584 | s->s3->flags |= SSL3_FLAGS_CCS_OK; | |
0f113f3e MC |
585 | ret = ssl3_get_finished(s, SSL3_ST_CR_FINISHED_A, |
586 | SSL3_ST_CR_FINISHED_B); | |
587 | if (ret <= 0) | |
588 | goto end; | |
589 | ||
590 | if (s->hit) | |
591 | s->state = SSL3_ST_CW_CHANGE_A; | |
592 | else | |
593 | s->state = SSL_ST_OK; | |
594 | s->init_num = 0; | |
595 | break; | |
596 | ||
597 | case SSL3_ST_CW_FLUSH: | |
598 | s->rwstate = SSL_WRITING; | |
599 | if (BIO_flush(s->wbio) <= 0) { | |
600 | ret = -1; | |
601 | goto end; | |
602 | } | |
603 | s->rwstate = SSL_NOTHING; | |
604 | s->state = s->s3->tmp.next_state; | |
605 | break; | |
606 | ||
607 | case SSL_ST_OK: | |
608 | /* clean a few things up */ | |
609 | ssl3_cleanup_key_block(s); | |
25aaa98a RS |
610 | BUF_MEM_free(s->init_buf); |
611 | s->init_buf = NULL; | |
0f113f3e MC |
612 | |
613 | /* | |
614 | * If we are not 'joining' the last two packets, remove the | |
615 | * buffering now | |
616 | */ | |
617 | if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) | |
618 | ssl_free_wbio_buffer(s); | |
619 | /* else do it later in ssl3_write */ | |
620 | ||
621 | s->init_num = 0; | |
622 | s->renegotiate = 0; | |
623 | s->new_session = 0; | |
624 | ||
625 | ssl_update_cache(s, SSL_SESS_CACHE_CLIENT); | |
626 | if (s->hit) | |
627 | s->ctx->stats.sess_hit++; | |
628 | ||
629 | ret = 1; | |
630 | /* s->server=0; */ | |
631 | s->handshake_func = ssl3_connect; | |
632 | s->ctx->stats.sess_connect_good++; | |
633 | ||
634 | if (cb != NULL) | |
635 | cb(s, SSL_CB_HANDSHAKE_DONE, 1); | |
636 | ||
637 | goto end; | |
638 | /* break; */ | |
639 | ||
cc273a93 | 640 | case SSL_ST_ERR: |
0f113f3e MC |
641 | default: |
642 | SSLerr(SSL_F_SSL3_CONNECT, SSL_R_UNKNOWN_STATE); | |
643 | ret = -1; | |
644 | goto end; | |
645 | /* break; */ | |
646 | } | |
647 | ||
648 | /* did we do anything */ | |
649 | if (!s->s3->tmp.reuse_message && !skip) { | |
650 | if (s->debug) { | |
651 | if ((ret = BIO_flush(s->wbio)) <= 0) | |
652 | goto end; | |
653 | } | |
654 | ||
655 | if ((cb != NULL) && (s->state != state)) { | |
656 | new_state = s->state; | |
657 | s->state = state; | |
658 | cb(s, SSL_CB_CONNECT_LOOP, 1); | |
659 | s->state = new_state; | |
660 | } | |
661 | } | |
662 | skip = 0; | |
663 | } | |
664 | end: | |
665 | s->in_handshake--; | |
25aaa98a | 666 | BUF_MEM_free(buf); |
0f113f3e MC |
667 | if (cb != NULL) |
668 | cb(s, SSL_CB_CONNECT_EXIT, ret); | |
669 | return (ret); | |
670 | } | |
d02b48c6 | 671 | |
36d16f8e | 672 | int ssl3_client_hello(SSL *s) |
0f113f3e MC |
673 | { |
674 | unsigned char *buf; | |
675 | unsigned char *p, *d; | |
676 | int i; | |
677 | unsigned long l; | |
678 | int al = 0; | |
09b6c2ef | 679 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
680 | int j; |
681 | SSL_COMP *comp; | |
682 | #endif | |
683 | ||
684 | buf = (unsigned char *)s->init_buf->data; | |
685 | if (s->state == SSL3_ST_CW_CLNT_HELLO_A) { | |
686 | SSL_SESSION *sess = s->session; | |
6e3d0153 EK |
687 | if ((sess == NULL) || (sess->ssl_version != s->version) || |
688 | #ifdef OPENSSL_NO_TLSEXT | |
689 | !sess->session_id_length || | |
690 | #else | |
691 | /* | |
692 | * In the case of EAP-FAST, we can have a pre-shared | |
693 | * "ticket" without a session ID. | |
694 | */ | |
695 | (!sess->session_id_length && !sess->tlsext_tick) || | |
696 | #endif | |
697 | (sess->not_resumable)) { | |
0f113f3e MC |
698 | if (!ssl_get_new_session(s, 0)) |
699 | goto err; | |
700 | } | |
701 | if (s->method->version == DTLS_ANY_VERSION) { | |
702 | /* Determine which DTLS version to use */ | |
703 | int options = s->options; | |
704 | /* If DTLS 1.2 disabled correct the version number */ | |
705 | if (options & SSL_OP_NO_DTLSv1_2) { | |
706 | if (tls1_suiteb(s)) { | |
707 | SSLerr(SSL_F_SSL3_CLIENT_HELLO, | |
708 | SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE); | |
709 | goto err; | |
710 | } | |
711 | /* | |
712 | * Disabling all versions is silly: return an error. | |
713 | */ | |
714 | if (options & SSL_OP_NO_DTLSv1) { | |
715 | SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_WRONG_SSL_VERSION); | |
716 | goto err; | |
717 | } | |
718 | /* | |
719 | * Update method so we don't use any DTLS 1.2 features. | |
720 | */ | |
721 | s->method = DTLSv1_client_method(); | |
722 | s->version = DTLS1_VERSION; | |
723 | } else { | |
724 | /* | |
725 | * We only support one version: update method | |
726 | */ | |
727 | if (options & SSL_OP_NO_DTLSv1) | |
728 | s->method = DTLSv1_2_client_method(); | |
729 | s->version = DTLS1_2_VERSION; | |
730 | } | |
731 | s->client_version = s->version; | |
732 | } | |
733 | /* else use the pre-loaded session */ | |
734 | ||
735 | p = s->s3->client_random; | |
736 | ||
737 | /* | |
738 | * for DTLS if client_random is initialized, reuse it, we are | |
739 | * required to use same upon reply to HelloVerify | |
740 | */ | |
741 | if (SSL_IS_DTLS(s)) { | |
742 | size_t idx; | |
743 | i = 1; | |
744 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
745 | if (p[idx]) { | |
746 | i = 0; | |
747 | break; | |
748 | } | |
749 | } | |
750 | } else | |
751 | i = 1; | |
752 | ||
e1b568dd MC |
753 | if (i && ssl_fill_hello_random(s, 0, p, |
754 | sizeof(s->s3->client_random)) <= 0) | |
755 | goto err; | |
0f113f3e MC |
756 | |
757 | /* Do the message type and length last */ | |
758 | d = p = ssl_handshake_start(s); | |
759 | ||
35a1cc90 MC |
760 | /*- |
761 | * version indicates the negotiated version: for example from | |
762 | * an SSLv2/v3 compatible client hello). The client_version | |
763 | * field is the maximum version we permit and it is also | |
764 | * used in RSA encrypted premaster secrets. Some servers can | |
765 | * choke if we initially report a higher version then | |
766 | * renegotiate to a lower one in the premaster secret. This | |
767 | * didn't happen with TLS 1.0 as most servers supported it | |
768 | * but it can with TLS 1.1 or later if the server only supports | |
769 | * 1.0. | |
770 | * | |
771 | * Possible scenario with previous logic: | |
772 | * 1. Client hello indicates TLS 1.2 | |
773 | * 2. Server hello says TLS 1.0 | |
774 | * 3. RSA encrypted premaster secret uses 1.2. | |
775 | * 4. Handhaked proceeds using TLS 1.0. | |
776 | * 5. Server sends hello request to renegotiate. | |
777 | * 6. Client hello indicates TLS v1.0 as we now | |
778 | * know that is maximum server supports. | |
779 | * 7. Server chokes on RSA encrypted premaster secret | |
780 | * containing version 1.0. | |
781 | * | |
782 | * For interoperability it should be OK to always use the | |
783 | * maximum version we support in client hello and then rely | |
784 | * on the checking of version to ensure the servers isn't | |
785 | * being inconsistent: for example initially negotiating with | |
786 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
787 | * client_version in client hello and not resetting it to | |
788 | * the negotiated version. | |
789 | */ | |
0f113f3e MC |
790 | *(p++) = s->client_version >> 8; |
791 | *(p++) = s->client_version & 0xff; | |
0f113f3e MC |
792 | |
793 | /* Random stuff */ | |
794 | memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); | |
795 | p += SSL3_RANDOM_SIZE; | |
796 | ||
797 | /* Session ID */ | |
798 | if (s->new_session) | |
799 | i = 0; | |
800 | else | |
801 | i = s->session->session_id_length; | |
802 | *(p++) = i; | |
803 | if (i != 0) { | |
804 | if (i > (int)sizeof(s->session->session_id)) { | |
805 | SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
806 | goto err; | |
807 | } | |
808 | memcpy(p, s->session->session_id, i); | |
809 | p += i; | |
810 | } | |
811 | ||
812 | /* cookie stuff for DTLS */ | |
813 | if (SSL_IS_DTLS(s)) { | |
814 | if (s->d1->cookie_len > sizeof(s->d1->cookie)) { | |
815 | SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
816 | goto err; | |
817 | } | |
818 | *(p++) = s->d1->cookie_len; | |
819 | memcpy(p, s->d1->cookie, s->d1->cookie_len); | |
820 | p += s->d1->cookie_len; | |
821 | } | |
822 | ||
823 | /* Ciphers supported */ | |
824 | i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2]), 0); | |
825 | if (i == 0) { | |
826 | SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); | |
827 | goto err; | |
828 | } | |
800e1cd9 | 829 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
0f113f3e MC |
830 | /* |
831 | * Some servers hang if client hello > 256 bytes as hack workaround | |
832 | * chop number of supported ciphers to keep it well below this if we | |
833 | * use TLS v1.2 | |
834 | */ | |
835 | if (TLS1_get_version(s) >= TLS1_2_VERSION | |
836 | && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) | |
837 | i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
838 | #endif | |
839 | s2n(i, p); | |
840 | p += i; | |
841 | ||
842 | /* COMPRESSION */ | |
09b6c2ef | 843 | #ifdef OPENSSL_NO_COMP |
0f113f3e | 844 | *(p++) = 1; |
09b6c2ef | 845 | #else |
566dda07 | 846 | |
0f113f3e MC |
847 | if (!ssl_allow_compression(s) || !s->ctx->comp_methods) |
848 | j = 0; | |
849 | else | |
850 | j = sk_SSL_COMP_num(s->ctx->comp_methods); | |
851 | *(p++) = 1 + j; | |
852 | for (i = 0; i < j; i++) { | |
853 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
854 | *(p++) = comp->id; | |
855 | } | |
09b6c2ef | 856 | #endif |
0f113f3e | 857 | *(p++) = 0; /* Add the NULL method */ |
761772d7 | 858 | |
ed3883d2 | 859 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
860 | /* TLS extensions */ |
861 | if (ssl_prepare_clienthello_tlsext(s) <= 0) { | |
862 | SSLerr(SSL_F_SSL3_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); | |
863 | goto err; | |
864 | } | |
865 | if ((p = | |
866 | ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH, | |
867 | &al)) == NULL) { | |
868 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
869 | SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
870 | goto err; | |
871 | } | |
872 | #endif | |
873 | ||
874 | l = p - d; | |
61986d32 | 875 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) { |
77d514c5 MC |
876 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
877 | SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
878 | goto err; | |
879 | } | |
0f113f3e MC |
880 | s->state = SSL3_ST_CW_CLNT_HELLO_B; |
881 | } | |
882 | ||
883 | /* SSL3_ST_CW_CLNT_HELLO_B */ | |
884 | return ssl_do_write(s); | |
885 | err: | |
cc273a93 | 886 | s->state = SSL_ST_ERR; |
0f113f3e MC |
887 | return (-1); |
888 | } | |
d02b48c6 | 889 | |
36d16f8e | 890 | int ssl3_get_server_hello(SSL *s) |
0f113f3e MC |
891 | { |
892 | STACK_OF(SSL_CIPHER) *sk; | |
893 | const SSL_CIPHER *c; | |
894 | CERT *ct = s->cert; | |
895 | unsigned char *p, *d; | |
896 | int i, al = SSL_AD_INTERNAL_ERROR, ok; | |
897 | unsigned int j; | |
898 | long n; | |
09b6c2ef | 899 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
900 | SSL_COMP *comp; |
901 | #endif | |
902 | /* | |
903 | * Hello verify request and/or server hello version may not match so set | |
904 | * first packet if we're negotiating version. | |
905 | */ | |
906 | if (SSL_IS_DTLS(s)) | |
907 | s->first_packet = 1; | |
908 | ||
909 | n = s->method->ssl_get_message(s, | |
910 | SSL3_ST_CR_SRVR_HELLO_A, | |
911 | SSL3_ST_CR_SRVR_HELLO_B, -1, 20000, &ok); | |
912 | ||
913 | if (!ok) | |
914 | return ((int)n); | |
915 | ||
916 | if (SSL_IS_DTLS(s)) { | |
917 | s->first_packet = 0; | |
918 | if (s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) { | |
919 | if (s->d1->send_cookie == 0) { | |
920 | s->s3->tmp.reuse_message = 1; | |
921 | return 1; | |
922 | } else { /* already sent a cookie */ | |
923 | ||
924 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
925 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE); | |
926 | goto f_err; | |
927 | } | |
928 | } | |
929 | } | |
930 | ||
931 | if (s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) { | |
932 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
933 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE); | |
934 | goto f_err; | |
935 | } | |
936 | ||
937 | d = p = (unsigned char *)s->init_msg; | |
938 | if (s->method->version == DTLS_ANY_VERSION) { | |
939 | /* Work out correct protocol version to use */ | |
940 | int hversion = (p[0] << 8) | p[1]; | |
941 | int options = s->options; | |
942 | if (hversion == DTLS1_2_VERSION && !(options & SSL_OP_NO_DTLSv1_2)) | |
943 | s->method = DTLSv1_2_client_method(); | |
944 | else if (tls1_suiteb(s)) { | |
945 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, | |
946 | SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE); | |
947 | s->version = hversion; | |
948 | al = SSL_AD_PROTOCOL_VERSION; | |
949 | goto f_err; | |
950 | } else if (hversion == DTLS1_VERSION && !(options & SSL_OP_NO_DTLSv1)) | |
951 | s->method = DTLSv1_client_method(); | |
952 | else { | |
953 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); | |
954 | s->version = hversion; | |
955 | al = SSL_AD_PROTOCOL_VERSION; | |
956 | goto f_err; | |
957 | } | |
958 | s->version = s->method->version; | |
959 | } | |
960 | ||
961 | if ((p[0] != (s->version >> 8)) || (p[1] != (s->version & 0xff))) { | |
962 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); | |
963 | s->version = (s->version & 0xff00) | p[1]; | |
964 | al = SSL_AD_PROTOCOL_VERSION; | |
965 | goto f_err; | |
966 | } | |
967 | p += 2; | |
968 | ||
969 | /* load the server hello data */ | |
970 | /* load the server random */ | |
971 | memcpy(s->s3->server_random, p, SSL3_RANDOM_SIZE); | |
972 | p += SSL3_RANDOM_SIZE; | |
973 | ||
974 | s->hit = 0; | |
975 | ||
976 | /* get the session-id */ | |
977 | j = *(p++); | |
978 | ||
979 | if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) { | |
980 | al = SSL_AD_ILLEGAL_PARAMETER; | |
981 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG); | |
982 | goto f_err; | |
983 | } | |
12bf56c0 | 984 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e | 985 | /* |
6e3d0153 EK |
986 | * Check if we can resume the session based on external pre-shared secret. |
987 | * EAP-FAST (RFC 4851) supports two types of session resumption. | |
988 | * Resumption based on server-side state works with session IDs. | |
989 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
990 | * works by overriding the SessionTicket extension at the application | |
991 | * layer, and does not send a session ID. (We do not know whether EAP-FAST | |
992 | * servers would honour the session ID.) Therefore, the session ID alone | |
993 | * is not a reliable indicator of session resumption, so we first check if | |
994 | * we can resume, and later peek at the next handshake message to see if the | |
995 | * server wants to resume. | |
0f113f3e | 996 | */ |
6e3d0153 EK |
997 | if (s->version >= TLS1_VERSION && s->tls_session_secret_cb && |
998 | s->session->tlsext_tick) { | |
0f113f3e MC |
999 | SSL_CIPHER *pref_cipher = NULL; |
1000 | s->session->master_key_length = sizeof(s->session->master_key); | |
1001 | if (s->tls_session_secret_cb(s, s->session->master_key, | |
1002 | &s->session->master_key_length, | |
1003 | NULL, &pref_cipher, | |
1004 | s->tls_session_secret_cb_arg)) { | |
1005 | s->session->cipher = pref_cipher ? | |
1006 | pref_cipher : ssl_get_cipher_by_char(s, p + j); | |
6e3d0153 EK |
1007 | } else { |
1008 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1009 | al = SSL_AD_INTERNAL_ERROR; | |
1010 | goto f_err; | |
0f113f3e MC |
1011 | } |
1012 | } | |
1013 | #endif /* OPENSSL_NO_TLSEXT */ | |
1014 | ||
6e3d0153 | 1015 | if (j != 0 && j == s->session->session_id_length |
0f113f3e MC |
1016 | && memcmp(p, s->session->session_id, j) == 0) { |
1017 | if (s->sid_ctx_length != s->session->sid_ctx_length | |
1018 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { | |
1019 | /* actually a client application bug */ | |
1020 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1021 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, | |
1022 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); | |
1023 | goto f_err; | |
1024 | } | |
1025 | s->hit = 1; | |
6e3d0153 | 1026 | } else { |
0f113f3e | 1027 | /* |
6e3d0153 EK |
1028 | * If we were trying for session-id reuse but the server |
1029 | * didn't echo the ID, make a new SSL_SESSION. | |
1030 | * In the case of EAP-FAST and PAC, we do not send a session ID, | |
1031 | * so the PAC-based session secret is always preserved. It'll be | |
1032 | * overwritten if the server refuses resumption. | |
0f113f3e MC |
1033 | */ |
1034 | if (s->session->session_id_length > 0) { | |
1035 | if (!ssl_get_new_session(s, 0)) { | |
1036 | goto f_err; | |
1037 | } | |
1038 | } | |
1039 | s->session->session_id_length = j; | |
1040 | memcpy(s->session->session_id, p, j); /* j could be 0 */ | |
1041 | } | |
1042 | p += j; | |
1043 | c = ssl_get_cipher_by_char(s, p); | |
1044 | if (c == NULL) { | |
1045 | /* unknown cipher */ | |
1046 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1047 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); | |
1048 | goto f_err; | |
1049 | } | |
1050 | /* Set version disabled mask now we know version */ | |
1051 | if (!SSL_USE_TLS1_2_CIPHERS(s)) | |
1052 | ct->mask_ssl = SSL_TLSV1_2; | |
1053 | else | |
1054 | ct->mask_ssl = 0; | |
1055 | /* | |
1056 | * If it is a disabled cipher we didn't send it in client hello, so | |
1057 | * return an error. | |
1058 | */ | |
1059 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
1060 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1061 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); | |
1062 | goto f_err; | |
1063 | } | |
1064 | p += ssl_put_cipher_by_char(s, NULL, NULL); | |
1065 | ||
1066 | sk = ssl_get_ciphers_by_id(s); | |
1067 | i = sk_SSL_CIPHER_find(sk, c); | |
1068 | if (i < 0) { | |
1069 | /* we did not say we would use this cipher */ | |
1070 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1071 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); | |
1072 | goto f_err; | |
1073 | } | |
1074 | ||
1075 | /* | |
1076 | * Depending on the session caching (internal/external), the cipher | |
1077 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
1078 | * set and use it for comparison. | |
1079 | */ | |
1080 | if (s->session->cipher) | |
1081 | s->session->cipher_id = s->session->cipher->id; | |
1082 | if (s->hit && (s->session->cipher_id != c->id)) { | |
9e9858d1 RS |
1083 | al = SSL_AD_ILLEGAL_PARAMETER; |
1084 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, | |
1085 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); | |
1086 | goto f_err; | |
0f113f3e MC |
1087 | } |
1088 | s->s3->tmp.new_cipher = c; | |
1089 | /* | |
1090 | * Don't digest cached records if no sigalgs: we may need them for client | |
1091 | * authentication. | |
1092 | */ | |
1093 | if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s)) | |
1094 | goto f_err; | |
1095 | /* lets get the compression algorithm */ | |
1096 | /* COMPRESSION */ | |
09b6c2ef | 1097 | #ifdef OPENSSL_NO_COMP |
0f113f3e MC |
1098 | if (*(p++) != 0) { |
1099 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1100 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, | |
1101 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); | |
1102 | goto f_err; | |
1103 | } | |
1104 | /* | |
1105 | * If compression is disabled we'd better not try to resume a session | |
1106 | * using compression. | |
1107 | */ | |
1108 | if (s->session->compress_meth != 0) { | |
1109 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); | |
1110 | goto f_err; | |
1111 | } | |
09b6c2ef | 1112 | #else |
0f113f3e MC |
1113 | j = *(p++); |
1114 | if (s->hit && j != s->session->compress_meth) { | |
1115 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1116 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, | |
1117 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); | |
1118 | goto f_err; | |
1119 | } | |
1120 | if (j == 0) | |
1121 | comp = NULL; | |
1122 | else if (!ssl_allow_compression(s)) { | |
1123 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1124 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); | |
1125 | goto f_err; | |
1126 | } else | |
1127 | comp = ssl3_comp_find(s->ctx->comp_methods, j); | |
1128 | ||
1129 | if ((j != 0) && (comp == NULL)) { | |
1130 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1131 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, | |
1132 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); | |
1133 | goto f_err; | |
1134 | } else { | |
1135 | s->s3->tmp.new_compression = comp; | |
1136 | } | |
09b6c2ef | 1137 | #endif |
761772d7 | 1138 | |
ed3883d2 | 1139 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e MC |
1140 | /* TLS extensions */ |
1141 | if (!ssl_parse_serverhello_tlsext(s, &p, d, n)) { | |
1142 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_PARSE_TLSEXT); | |
1143 | goto err; | |
1144 | } | |
1145 | #endif | |
1146 | ||
1147 | if (p != (d + n)) { | |
1148 | /* wrong packet length */ | |
1149 | al = SSL_AD_DECODE_ERROR; | |
1150 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH); | |
1151 | goto f_err; | |
1152 | } | |
1153 | ||
1154 | return (1); | |
1155 | f_err: | |
1156 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1157 | err: | |
cc273a93 | 1158 | s->state = SSL_ST_ERR; |
0f113f3e MC |
1159 | return (-1); |
1160 | } | |
d02b48c6 | 1161 | |
36d16f8e | 1162 | int ssl3_get_server_certificate(SSL *s) |
0f113f3e MC |
1163 | { |
1164 | int al, i, ok, ret = -1; | |
1165 | unsigned long n, nc, llen, l; | |
1166 | X509 *x = NULL; | |
1167 | const unsigned char *q, *p; | |
1168 | unsigned char *d; | |
1169 | STACK_OF(X509) *sk = NULL; | |
1170 | SESS_CERT *sc; | |
1171 | EVP_PKEY *pkey = NULL; | |
1172 | int need_cert = 1; /* VRS: 0=> will allow null cert if auth == | |
1173 | * KRB5 */ | |
1174 | ||
1175 | n = s->method->ssl_get_message(s, | |
1176 | SSL3_ST_CR_CERT_A, | |
1177 | SSL3_ST_CR_CERT_B, | |
1178 | -1, s->max_cert_list, &ok); | |
1179 | ||
1180 | if (!ok) | |
1181 | return ((int)n); | |
1182 | ||
1183 | if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || | |
1184 | ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) && | |
1185 | (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) { | |
1186 | s->s3->tmp.reuse_message = 1; | |
1187 | return (1); | |
1188 | } | |
1189 | ||
1190 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) { | |
1191 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1192 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_BAD_MESSAGE_TYPE); | |
1193 | goto f_err; | |
1194 | } | |
1195 | p = d = (unsigned char *)s->init_msg; | |
1196 | ||
1197 | if ((sk = sk_X509_new_null()) == NULL) { | |
1198 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); | |
cc273a93 | 1199 | goto err; |
0f113f3e MC |
1200 | } |
1201 | ||
1202 | n2l3(p, llen); | |
1203 | if (llen + 3 != n) { | |
1204 | al = SSL_AD_DECODE_ERROR; | |
1205 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); | |
1206 | goto f_err; | |
1207 | } | |
1208 | for (nc = 0; nc < llen;) { | |
1209 | n2l3(p, l); | |
1210 | if ((l + nc + 3) > llen) { | |
1211 | al = SSL_AD_DECODE_ERROR; | |
1212 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, | |
1213 | SSL_R_CERT_LENGTH_MISMATCH); | |
1214 | goto f_err; | |
1215 | } | |
1216 | ||
1217 | q = p; | |
1218 | x = d2i_X509(NULL, &q, l); | |
1219 | if (x == NULL) { | |
1220 | al = SSL_AD_BAD_CERTIFICATE; | |
1221 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); | |
1222 | goto f_err; | |
1223 | } | |
1224 | if (q != (p + l)) { | |
1225 | al = SSL_AD_DECODE_ERROR; | |
1226 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, | |
1227 | SSL_R_CERT_LENGTH_MISMATCH); | |
1228 | goto f_err; | |
1229 | } | |
1230 | if (!sk_X509_push(sk, x)) { | |
1231 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); | |
cc273a93 | 1232 | goto err; |
0f113f3e MC |
1233 | } |
1234 | x = NULL; | |
1235 | nc += l + 3; | |
1236 | p = q; | |
1237 | } | |
1238 | ||
1239 | i = ssl_verify_cert_chain(s, sk); | |
1240 | if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) | |
82d5d46c | 1241 | #ifndef OPENSSL_NO_KRB5 |
0f113f3e MC |
1242 | && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && |
1243 | (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) | |
1244 | #endif /* OPENSSL_NO_KRB5 */ | |
1245 | ) { | |
1246 | al = ssl_verify_alarm_type(s->verify_result); | |
1247 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, | |
1248 | SSL_R_CERTIFICATE_VERIFY_FAILED); | |
1249 | goto f_err; | |
1250 | } | |
1251 | ERR_clear_error(); /* but we keep s->verify_result */ | |
1252 | if (i > 1) { | |
1253 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, i); | |
1254 | al = SSL_AD_HANDSHAKE_FAILURE; | |
1255 | goto f_err; | |
1256 | } | |
1257 | ||
1258 | sc = ssl_sess_cert_new(); | |
1259 | if (sc == NULL) | |
cc273a93 | 1260 | goto err; |
0f113f3e | 1261 | |
62adbcee | 1262 | ssl_sess_cert_free(s->session->sess_cert); |
0f113f3e MC |
1263 | s->session->sess_cert = sc; |
1264 | ||
1265 | sc->cert_chain = sk; | |
1266 | /* | |
1267 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
1268 | * which we don't include in s3_srvr.c | |
1269 | */ | |
1270 | x = sk_X509_value(sk, 0); | |
1271 | sk = NULL; | |
1272 | /* | |
1273 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
1274 | */ | |
1275 | ||
1276 | pkey = X509_get_pubkey(x); | |
1277 | ||
1278 | /* VRS: allow null cert if auth == KRB5 */ | |
1279 | need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && | |
1280 | (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) | |
1281 | ? 0 : 1; | |
f9b3bff6 RL |
1282 | |
1283 | #ifdef KSSL_DEBUG | |
0f113f3e MC |
1284 | fprintf(stderr, "pkey,x = %p, %p\n", pkey, x); |
1285 | fprintf(stderr, "ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x, pkey)); | |
1286 | fprintf(stderr, "cipher, alg, nc = %s, %lx, %lx, %d\n", | |
1287 | s->s3->tmp.new_cipher->name, | |
1288 | s->s3->tmp.new_cipher->algorithm_mkey, | |
1289 | s->s3->tmp.new_cipher->algorithm_auth, need_cert); | |
1290 | #endif /* KSSL_DEBUG */ | |
1291 | ||
1292 | if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) { | |
1293 | x = NULL; | |
1294 | al = SSL3_AL_FATAL; | |
1295 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, | |
1296 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); | |
1297 | goto f_err; | |
1298 | } | |
1299 | ||
1300 | i = ssl_cert_type(x, pkey); | |
1301 | if (need_cert && i < 0) { | |
1302 | x = NULL; | |
1303 | al = SSL3_AL_FATAL; | |
1304 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, | |
1305 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); | |
1306 | goto f_err; | |
1307 | } | |
1308 | ||
1309 | if (need_cert) { | |
1310 | int exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); | |
1311 | if (exp_idx >= 0 && i != exp_idx) { | |
1312 | x = NULL; | |
1313 | al = SSL_AD_ILLEGAL_PARAMETER; | |
1314 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, | |
1315 | SSL_R_WRONG_CERTIFICATE_TYPE); | |
1316 | goto f_err; | |
1317 | } | |
1318 | sc->peer_cert_type = i; | |
1319 | CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509); | |
1320 | /* | |
1321 | * Why would the following ever happen? We just created sc a couple | |
1322 | * of lines ago. | |
1323 | */ | |
222561fe | 1324 | X509_free(sc->peer_pkeys[i].x509); |
0f113f3e MC |
1325 | sc->peer_pkeys[i].x509 = x; |
1326 | sc->peer_key = &(sc->peer_pkeys[i]); | |
1327 | ||
222561fe | 1328 | X509_free(s->session->peer); |
0f113f3e MC |
1329 | CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509); |
1330 | s->session->peer = x; | |
1331 | } else { | |
1332 | sc->peer_cert_type = i; | |
1333 | sc->peer_key = NULL; | |
1334 | ||
222561fe | 1335 | X509_free(s->session->peer); |
0f113f3e MC |
1336 | s->session->peer = NULL; |
1337 | } | |
1338 | s->session->verify_result = s->verify_result; | |
1339 | ||
1340 | x = NULL; | |
1341 | ret = 1; | |
66696478 RS |
1342 | goto done; |
1343 | ||
0f113f3e | 1344 | f_err: |
66696478 | 1345 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 MC |
1346 | err: |
1347 | s->state = SSL_ST_ERR; | |
66696478 | 1348 | done: |
0f113f3e MC |
1349 | EVP_PKEY_free(pkey); |
1350 | X509_free(x); | |
1351 | sk_X509_pop_free(sk, X509_free); | |
1352 | return (ret); | |
1353 | } | |
d02b48c6 | 1354 | |
36d16f8e | 1355 | int ssl3_get_key_exchange(SSL *s) |
0f113f3e | 1356 | { |
bc36ee62 | 1357 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
1358 | unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2]; |
1359 | #endif | |
1360 | EVP_MD_CTX md_ctx; | |
1361 | unsigned char *param, *p; | |
1362 | int al, j, ok; | |
1363 | long i, param_len, n, alg_k, alg_a; | |
1364 | EVP_PKEY *pkey = NULL; | |
1365 | const EVP_MD *md = NULL; | |
bc36ee62 | 1366 | #ifndef OPENSSL_NO_RSA |
0f113f3e | 1367 | RSA *rsa = NULL; |
79df9d62 | 1368 | #endif |
bc36ee62 | 1369 | #ifndef OPENSSL_NO_DH |
0f113f3e | 1370 | DH *dh = NULL; |
58964a49 | 1371 | #endif |
10bf4fc2 | 1372 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
1373 | EC_KEY *ecdh = NULL; |
1374 | BN_CTX *bn_ctx = NULL; | |
1375 | EC_POINT *srvr_ecpoint = NULL; | |
1376 | int curve_nid = 0; | |
1377 | int encoded_pt_len = 0; | |
1378 | #endif | |
1379 | ||
1380 | EVP_MD_CTX_init(&md_ctx); | |
1381 | ||
1382 | /* | |
1383 | * use same message size as in ssl3_get_certificate_request() as | |
1384 | * ServerKeyExchange message may be skipped | |
1385 | */ | |
1386 | n = s->method->ssl_get_message(s, | |
1387 | SSL3_ST_CR_KEY_EXCH_A, | |
1388 | SSL3_ST_CR_KEY_EXCH_B, | |
1389 | -1, s->max_cert_list, &ok); | |
1390 | if (!ok) | |
1391 | return ((int)n); | |
1392 | ||
1393 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
1394 | ||
1395 | if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) { | |
1396 | /* | |
1397 | * Can't skip server key exchange if this is an ephemeral | |
1398 | * ciphersuite. | |
1399 | */ | |
1400 | if (alg_k & (SSL_kDHE | SSL_kECDHE)) { | |
1401 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); | |
1402 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1403 | goto f_err; | |
1404 | } | |
ddac1974 | 1405 | #ifndef OPENSSL_NO_PSK |
0f113f3e MC |
1406 | /* |
1407 | * In plain PSK ciphersuite, ServerKeyExchange can be omitted if no | |
1408 | * identity hint is sent. Set session->sess_cert anyway to avoid | |
1409 | * problems later. | |
1410 | */ | |
1411 | if (alg_k & SSL_kPSK) { | |
1412 | s->session->sess_cert = ssl_sess_cert_new(); | |
b548a1f1 | 1413 | OPENSSL_free(s->ctx->psk_identity_hint); |
0f113f3e MC |
1414 | s->ctx->psk_identity_hint = NULL; |
1415 | } | |
1416 | #endif | |
1417 | s->s3->tmp.reuse_message = 1; | |
1418 | return (1); | |
1419 | } | |
1420 | ||
1421 | param = p = (unsigned char *)s->init_msg; | |
1422 | if (s->session->sess_cert != NULL) { | |
bc36ee62 | 1423 | #ifndef OPENSSL_NO_RSA |
d6407083 RS |
1424 | RSA_free(s->session->sess_cert->peer_rsa_tmp); |
1425 | s->session->sess_cert->peer_rsa_tmp = NULL; | |
d02b48c6 | 1426 | #endif |
bc36ee62 | 1427 | #ifndef OPENSSL_NO_DH |
d6407083 RS |
1428 | DH_free(s->session->sess_cert->peer_dh_tmp); |
1429 | s->session->sess_cert->peer_dh_tmp = NULL; | |
ea262260 | 1430 | #endif |
10bf4fc2 | 1431 | #ifndef OPENSSL_NO_EC |
8fdc3734 RS |
1432 | EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); |
1433 | s->session->sess_cert->peer_ecdh_tmp = NULL; | |
d02b48c6 | 1434 | #endif |
0f113f3e MC |
1435 | } else { |
1436 | s->session->sess_cert = ssl_sess_cert_new(); | |
1437 | } | |
d02b48c6 | 1438 | |
0f113f3e MC |
1439 | /* Total length of the parameters including the length prefix */ |
1440 | param_len = 0; | |
f2be92b9 | 1441 | |
0f113f3e | 1442 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; |
d02b48c6 | 1443 | |
0f113f3e | 1444 | al = SSL_AD_DECODE_ERROR; |
f2be92b9 | 1445 | |
ddac1974 | 1446 | #ifndef OPENSSL_NO_PSK |
0f113f3e MC |
1447 | if (alg_k & SSL_kPSK) { |
1448 | char tmp_id_hint[PSK_MAX_IDENTITY_LEN + 1]; | |
1449 | ||
1450 | param_len = 2; | |
1451 | if (param_len > n) { | |
1452 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1453 | goto f_err; | |
1454 | } | |
1455 | n2s(p, i); | |
1456 | ||
1457 | /* | |
1458 | * Store PSK identity hint for later use, hint is used in | |
1459 | * ssl3_send_client_key_exchange. Assume that the maximum length of | |
1460 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1461 | * identity. | |
1462 | */ | |
1463 | if (i > PSK_MAX_IDENTITY_LEN) { | |
1464 | al = SSL_AD_HANDSHAKE_FAILURE; | |
1465 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG); | |
1466 | goto f_err; | |
1467 | } | |
1468 | if (i > n - param_len) { | |
1469 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, | |
1470 | SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); | |
1471 | goto f_err; | |
1472 | } | |
1473 | param_len += i; | |
1474 | ||
1475 | /* | |
1476 | * If received PSK identity hint contains NULL characters, the hint | |
1477 | * is truncated from the first NULL. p may not be ending with NULL, | |
1478 | * so create a NULL-terminated string. | |
1479 | */ | |
1480 | memcpy(tmp_id_hint, p, i); | |
1481 | memset(tmp_id_hint + i, 0, PSK_MAX_IDENTITY_LEN + 1 - i); | |
b548a1f1 | 1482 | OPENSSL_free(s->ctx->psk_identity_hint); |
0f113f3e MC |
1483 | s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint); |
1484 | if (s->ctx->psk_identity_hint == NULL) { | |
1485 | al = SSL_AD_HANDSHAKE_FAILURE; | |
1486 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
1487 | goto f_err; | |
1488 | } | |
1489 | ||
1490 | p += i; | |
1491 | n -= param_len; | |
1492 | } else | |
1493 | #endif /* !OPENSSL_NO_PSK */ | |
edc032b5 | 1494 | #ifndef OPENSSL_NO_SRP |
0f113f3e MC |
1495 | if (alg_k & SSL_kSRP) { |
1496 | param_len = 2; | |
1497 | if (param_len > n) { | |
1498 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1499 | goto f_err; | |
1500 | } | |
1501 | n2s(p, i); | |
1502 | ||
1503 | if (i > n - param_len) { | |
1504 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_N_LENGTH); | |
1505 | goto f_err; | |
1506 | } | |
1507 | param_len += i; | |
1508 | ||
75ebbd9a | 1509 | if ((s->srp_ctx.N = BN_bin2bn(p, i, NULL)) == NULL) { |
0f113f3e MC |
1510 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1511 | goto err; | |
1512 | } | |
1513 | p += i; | |
1514 | ||
1515 | if (2 > n - param_len) { | |
1516 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1517 | goto f_err; | |
1518 | } | |
1519 | param_len += 2; | |
1520 | ||
1521 | n2s(p, i); | |
1522 | ||
1523 | if (i > n - param_len) { | |
1524 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_G_LENGTH); | |
1525 | goto f_err; | |
1526 | } | |
1527 | param_len += i; | |
1528 | ||
75ebbd9a | 1529 | if ((s->srp_ctx.g = BN_bin2bn(p, i, NULL)) == NULL) { |
0f113f3e MC |
1530 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1531 | goto err; | |
1532 | } | |
1533 | p += i; | |
1534 | ||
1535 | if (1 > n - param_len) { | |
1536 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1537 | goto f_err; | |
1538 | } | |
1539 | param_len += 1; | |
1540 | ||
1541 | i = (unsigned int)(p[0]); | |
1542 | p++; | |
1543 | ||
1544 | if (i > n - param_len) { | |
1545 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_S_LENGTH); | |
1546 | goto f_err; | |
1547 | } | |
1548 | param_len += i; | |
1549 | ||
75ebbd9a | 1550 | if ((s->srp_ctx.s = BN_bin2bn(p, i, NULL)) == NULL) { |
0f113f3e MC |
1551 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1552 | goto err; | |
1553 | } | |
1554 | p += i; | |
1555 | ||
1556 | if (2 > n - param_len) { | |
1557 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1558 | goto f_err; | |
1559 | } | |
1560 | param_len += 2; | |
1561 | ||
1562 | n2s(p, i); | |
1563 | ||
1564 | if (i > n - param_len) { | |
1565 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_B_LENGTH); | |
1566 | goto f_err; | |
1567 | } | |
1568 | param_len += i; | |
1569 | ||
75ebbd9a | 1570 | if ((s->srp_ctx.B = BN_bin2bn(p, i, NULL)) == NULL) { |
0f113f3e MC |
1571 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1572 | goto err; | |
1573 | } | |
1574 | p += i; | |
1575 | n -= param_len; | |
1576 | ||
1577 | if (!srp_verify_server_param(s, &al)) { | |
1578 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS); | |
1579 | goto f_err; | |
1580 | } | |
0989790b | 1581 | |
edc032b5 | 1582 | /* We must check if there is a certificate */ |
0f113f3e MC |
1583 | # ifndef OPENSSL_NO_RSA |
1584 | if (alg_a & SSL_aRSA) | |
1585 | pkey = | |
1586 | X509_get_pubkey(s->session-> | |
1587 | sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); | |
1588 | # else | |
1589 | if (0) ; | |
1590 | # endif | |
1591 | # ifndef OPENSSL_NO_DSA | |
1592 | else if (alg_a & SSL_aDSS) | |
1593 | pkey = | |
1594 | X509_get_pubkey(s->session-> | |
1595 | sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN]. | |
1596 | x509); | |
1597 | # endif | |
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) | |
1655 | pkey = | |
1656 | X509_get_pubkey(s->session-> | |
1657 | sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); | |
1658 | else { | |
1659 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
1660 | goto err; | |
1661 | } | |
1662 | s->session->sess_cert->peer_rsa_tmp = rsa; | |
1663 | rsa = NULL; | |
1664 | } | |
1665 | #else /* OPENSSL_NO_RSA */ | |
1666 | if (0) ; | |
d02b48c6 | 1667 | #endif |
bc36ee62 | 1668 | #ifndef OPENSSL_NO_DH |
0f113f3e MC |
1669 | else if (alg_k & SSL_kDHE) { |
1670 | if ((dh = DH_new()) == NULL) { | |
1671 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB); | |
1672 | goto err; | |
1673 | } | |
1674 | ||
1675 | param_len = 2; | |
1676 | if (param_len > n) { | |
1677 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1678 | goto f_err; | |
1679 | } | |
1680 | n2s(p, i); | |
1681 | ||
1682 | if (i > n - param_len) { | |
1683 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_P_LENGTH); | |
1684 | goto f_err; | |
1685 | } | |
1686 | param_len += i; | |
1687 | ||
75ebbd9a | 1688 | if ((dh->p = BN_bin2bn(p, i, NULL)) == NULL) { |
0f113f3e MC |
1689 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1690 | goto err; | |
1691 | } | |
1692 | p += i; | |
1693 | ||
1694 | if (2 > n - param_len) { | |
1695 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1696 | goto f_err; | |
1697 | } | |
1698 | param_len += 2; | |
1699 | ||
1700 | n2s(p, i); | |
1701 | ||
1702 | if (i > n - param_len) { | |
1703 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_G_LENGTH); | |
1704 | goto f_err; | |
1705 | } | |
1706 | param_len += i; | |
1707 | ||
75ebbd9a | 1708 | if ((dh->g = BN_bin2bn(p, i, NULL)) == NULL) { |
0f113f3e MC |
1709 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1710 | goto err; | |
1711 | } | |
1712 | p += i; | |
1713 | ||
1714 | if (2 > n - param_len) { | |
1715 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1716 | goto f_err; | |
1717 | } | |
1718 | param_len += 2; | |
1719 | ||
1720 | n2s(p, i); | |
1721 | ||
1722 | if (i > n - param_len) { | |
1723 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_PUB_KEY_LENGTH); | |
1724 | goto f_err; | |
1725 | } | |
1726 | param_len += i; | |
1727 | ||
75ebbd9a | 1728 | if ((dh->pub_key = BN_bin2bn(p, i, NULL)) == NULL) { |
0f113f3e MC |
1729 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1730 | goto err; | |
1731 | } | |
1732 | p += i; | |
1733 | n -= param_len; | |
1734 | ||
1735 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { | |
1736 | al = SSL_AD_HANDSHAKE_FAILURE; | |
1737 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL); | |
1738 | goto f_err; | |
1739 | } | |
1740 | # ifndef OPENSSL_NO_RSA | |
1741 | if (alg_a & SSL_aRSA) | |
1742 | pkey = | |
1743 | X509_get_pubkey(s->session-> | |
1744 | sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); | |
1745 | # else | |
1746 | if (0) ; | |
1747 | # endif | |
1748 | # ifndef OPENSSL_NO_DSA | |
1749 | else if (alg_a & SSL_aDSS) | |
1750 | pkey = | |
1751 | X509_get_pubkey(s->session-> | |
1752 | sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN]. | |
1753 | x509); | |
1754 | # endif | |
1755 | /* else anonymous DH, so no certificate or pkey. */ | |
1756 | ||
1757 | s->session->sess_cert->peer_dh_tmp = dh; | |
1758 | dh = NULL; | |
0f113f3e MC |
1759 | } |
1760 | #endif /* !OPENSSL_NO_DH */ | |
ea262260 | 1761 | |
10bf4fc2 | 1762 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
1763 | else if (alg_k & SSL_kECDHE) { |
1764 | EC_GROUP *ngroup; | |
1765 | const EC_GROUP *group; | |
1766 | ||
1767 | if ((ecdh = EC_KEY_new()) == NULL) { | |
1768 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
1769 | goto err; | |
1770 | } | |
1771 | ||
1772 | /* | |
1773 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
1774 | * public key. Keep accumulating lengths of various components in | |
1775 | * param_len and make sure it never exceeds n. | |
1776 | */ | |
1777 | ||
1778 | /* | |
1779 | * XXX: For now we only support named (not generic) curves and the | |
1780 | * ECParameters in this case is just three bytes. We also need one | |
1781 | * byte for the length of the encoded point | |
1782 | */ | |
1783 | param_len = 4; | |
1784 | if (param_len > n) { | |
1785 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1786 | goto f_err; | |
1787 | } | |
1788 | /* | |
1789 | * Check curve is one of our preferences, if not server has sent an | |
1790 | * invalid curve. ECParameters is 3 bytes. | |
1791 | */ | |
1792 | if (!tls1_check_curve(s, p, 3)) { | |
1793 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_CURVE); | |
1794 | goto f_err; | |
1795 | } | |
1796 | ||
1797 | if ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0) { | |
1798 | al = SSL_AD_INTERNAL_ERROR; | |
1799 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, | |
1800 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); | |
1801 | goto f_err; | |
1802 | } | |
1803 | ||
1804 | ngroup = EC_GROUP_new_by_curve_name(curve_nid); | |
1805 | if (ngroup == NULL) { | |
1806 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB); | |
1807 | goto err; | |
1808 | } | |
1809 | if (EC_KEY_set_group(ecdh, ngroup) == 0) { | |
1810 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_EC_LIB); | |
1811 | goto err; | |
1812 | } | |
1813 | EC_GROUP_free(ngroup); | |
1814 | ||
1815 | group = EC_KEY_get0_group(ecdh); | |
1816 | ||
1817 | if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && | |
1818 | (EC_GROUP_get_degree(group) > 163)) { | |
1819 | al = SSL_AD_EXPORT_RESTRICTION; | |
1820 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, | |
1821 | SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); | |
1822 | goto f_err; | |
1823 | } | |
1824 | ||
1825 | p += 3; | |
1826 | ||
1827 | /* Next, get the encoded ECPoint */ | |
1828 | if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || | |
1829 | ((bn_ctx = BN_CTX_new()) == NULL)) { | |
1830 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
1831 | goto err; | |
1832 | } | |
1833 | ||
1834 | encoded_pt_len = *p; /* length of encoded point */ | |
1835 | p += 1; | |
1836 | ||
1837 | if ((encoded_pt_len > n - param_len) || | |
1838 | (EC_POINT_oct2point(group, srvr_ecpoint, | |
1839 | p, encoded_pt_len, bn_ctx) == 0)) { | |
1840 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT); | |
1841 | goto f_err; | |
1842 | } | |
1843 | param_len += encoded_pt_len; | |
1844 | ||
1845 | n -= param_len; | |
1846 | p += encoded_pt_len; | |
1847 | ||
1848 | /* | |
1849 | * The ECC/TLS specification does not mention the use of DSA to sign | |
1850 | * ECParameters in the server key exchange message. We do support RSA | |
1851 | * and ECDSA. | |
1852 | */ | |
1853 | if (0) ; | |
1854 | # ifndef OPENSSL_NO_RSA | |
1855 | else if (alg_a & SSL_aRSA) | |
1856 | pkey = | |
1857 | X509_get_pubkey(s->session-> | |
1858 | sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); | |
1859 | # endif | |
10bf4fc2 | 1860 | # ifndef OPENSSL_NO_EC |
0f113f3e MC |
1861 | else if (alg_a & SSL_aECDSA) |
1862 | pkey = | |
1863 | X509_get_pubkey(s->session-> | |
1864 | sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); | |
1865 | # endif | |
1866 | /* else anonymous ECDH, so no certificate or pkey. */ | |
1867 | EC_KEY_set_public_key(ecdh, srvr_ecpoint); | |
1868 | s->session->sess_cert->peer_ecdh_tmp = ecdh; | |
1869 | ecdh = NULL; | |
1870 | BN_CTX_free(bn_ctx); | |
1871 | bn_ctx = NULL; | |
1872 | EC_POINT_free(srvr_ecpoint); | |
1873 | srvr_ecpoint = NULL; | |
1874 | } else if (alg_k) { | |
1875 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
1876 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); | |
1877 | goto f_err; | |
1878 | } | |
10bf4fc2 | 1879 | #endif /* !OPENSSL_NO_EC */ |
0f113f3e MC |
1880 | |
1881 | /* p points to the next byte, there are 'n' bytes left */ | |
1882 | ||
1883 | /* if it was signed, check the signature */ | |
1884 | if (pkey != NULL) { | |
1885 | if (SSL_USE_SIGALGS(s)) { | |
1886 | int rv; | |
1887 | if (2 > n) { | |
1888 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1889 | goto f_err; | |
1890 | } | |
1891 | rv = tls12_check_peer_sigalg(&md, s, p, pkey); | |
1892 | if (rv == -1) | |
1893 | goto err; | |
1894 | else if (rv == 0) { | |
1895 | goto f_err; | |
1896 | } | |
a2f9200f | 1897 | #ifdef SSL_DEBUG |
0f113f3e MC |
1898 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
1899 | #endif | |
1900 | p += 2; | |
1901 | n -= 2; | |
1902 | } else | |
1903 | md = EVP_sha1(); | |
1904 | ||
1905 | if (2 > n) { | |
1906 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); | |
1907 | goto f_err; | |
1908 | } | |
1909 | n2s(p, i); | |
1910 | n -= 2; | |
1911 | j = EVP_PKEY_size(pkey); | |
1912 | ||
1913 | /* | |
1914 | * Check signature length. If n is 0 then signature is empty | |
1915 | */ | |
1916 | if ((i != n) || (n > j) || (n <= 0)) { | |
1917 | /* wrong packet length */ | |
1918 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH); | |
1919 | goto f_err; | |
1920 | } | |
bc36ee62 | 1921 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
1922 | if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s)) { |
1923 | int num; | |
1924 | unsigned int size; | |
1925 | ||
1926 | j = 0; | |
1927 | q = md_buf; | |
1928 | for (num = 2; num > 0; num--) { | |
1929 | EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); | |
1930 | EVP_DigestInit_ex(&md_ctx, (num == 2) | |
1931 | ? s->ctx->md5 : s->ctx->sha1, NULL); | |
1932 | EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]), | |
1933 | SSL3_RANDOM_SIZE); | |
1934 | EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]), | |
1935 | SSL3_RANDOM_SIZE); | |
1936 | EVP_DigestUpdate(&md_ctx, param, param_len); | |
1937 | EVP_DigestFinal_ex(&md_ctx, q, &size); | |
1938 | q += size; | |
1939 | j += size; | |
1940 | } | |
1941 | i = RSA_verify(NID_md5_sha1, md_buf, j, p, n, pkey->pkey.rsa); | |
1942 | if (i < 0) { | |
1943 | al = SSL_AD_DECRYPT_ERROR; | |
1944 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT); | |
1945 | goto f_err; | |
1946 | } | |
1947 | if (i == 0) { | |
1948 | /* bad signature */ | |
1949 | al = SSL_AD_DECRYPT_ERROR; | |
1950 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
1951 | goto f_err; | |
1952 | } | |
1953 | } else | |
1954 | #endif | |
1955 | { | |
1956 | EVP_VerifyInit_ex(&md_ctx, md, NULL); | |
1957 | EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]), | |
1958 | SSL3_RANDOM_SIZE); | |
1959 | EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]), | |
1960 | SSL3_RANDOM_SIZE); | |
1961 | EVP_VerifyUpdate(&md_ctx, param, param_len); | |
1962 | if (EVP_VerifyFinal(&md_ctx, p, (int)n, pkey) <= 0) { | |
1963 | /* bad signature */ | |
1964 | al = SSL_AD_DECRYPT_ERROR; | |
1965 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); | |
1966 | goto f_err; | |
1967 | } | |
1968 | } | |
1969 | } else { | |
1970 | /* aNULL, aSRP or kPSK do not need public keys */ | |
1971 | if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_kPSK)) { | |
1972 | /* Might be wrong key type, check it */ | |
1973 | if (ssl3_check_cert_and_algorithm(s)) | |
1974 | /* Otherwise this shouldn't happen */ | |
1975 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
1976 | goto err; | |
1977 | } | |
1978 | /* still data left over */ | |
1979 | if (n != 0) { | |
1980 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); | |
1981 | goto f_err; | |
1982 | } | |
1983 | } | |
1984 | EVP_PKEY_free(pkey); | |
1985 | EVP_MD_CTX_cleanup(&md_ctx); | |
1986 | return (1); | |
1987 | f_err: | |
1988 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1989 | err: | |
1990 | EVP_PKEY_free(pkey); | |
bc36ee62 | 1991 | #ifndef OPENSSL_NO_RSA |
d6407083 | 1992 | RSA_free(rsa); |
6b521df3 | 1993 | #endif |
bc36ee62 | 1994 | #ifndef OPENSSL_NO_DH |
d6407083 | 1995 | DH_free(dh); |
ea262260 | 1996 | #endif |
10bf4fc2 | 1997 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
1998 | BN_CTX_free(bn_ctx); |
1999 | EC_POINT_free(srvr_ecpoint); | |
8fdc3734 | 2000 | EC_KEY_free(ecdh); |
6b521df3 | 2001 | #endif |
0f113f3e | 2002 | EVP_MD_CTX_cleanup(&md_ctx); |
cc273a93 | 2003 | s->state = SSL_ST_ERR; |
0f113f3e MC |
2004 | return (-1); |
2005 | } | |
d02b48c6 | 2006 | |
36d16f8e | 2007 | int ssl3_get_certificate_request(SSL *s) |
0f113f3e MC |
2008 | { |
2009 | int ok, ret = 0; | |
2010 | unsigned long n, nc, l; | |
2011 | unsigned int llen, ctype_num, i; | |
2012 | X509_NAME *xn = NULL; | |
2013 | const unsigned char *p, *q; | |
2014 | unsigned char *d; | |
2015 | STACK_OF(X509_NAME) *ca_sk = NULL; | |
2016 | ||
2017 | n = s->method->ssl_get_message(s, | |
2018 | SSL3_ST_CR_CERT_REQ_A, | |
2019 | SSL3_ST_CR_CERT_REQ_B, | |
2020 | -1, s->max_cert_list, &ok); | |
2021 | ||
2022 | if (!ok) | |
2023 | return ((int)n); | |
2024 | ||
2025 | s->s3->tmp.cert_req = 0; | |
2026 | ||
2027 | if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) { | |
2028 | s->s3->tmp.reuse_message = 1; | |
2029 | /* | |
2030 | * If we get here we don't need any cached handshake records as we | |
2031 | * wont be doing client auth. | |
2032 | */ | |
2033 | if (s->s3->handshake_buffer) { | |
2034 | if (!ssl3_digest_cached_records(s)) | |
2035 | goto err; | |
2036 | } | |
2037 | return (1); | |
2038 | } | |
2039 | ||
2040 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) { | |
2041 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); | |
2042 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_WRONG_MESSAGE_TYPE); | |
2043 | goto err; | |
2044 | } | |
2045 | ||
2046 | /* TLS does not like anon-DH with client cert */ | |
2047 | if (s->version > SSL3_VERSION) { | |
2048 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) { | |
2049 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); | |
2050 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, | |
2051 | SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); | |
2052 | goto err; | |
2053 | } | |
2054 | } | |
2055 | ||
2056 | p = d = (unsigned char *)s->init_msg; | |
2057 | ||
2058 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { | |
2059 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); | |
2060 | goto err; | |
2061 | } | |
2062 | ||
2063 | /* get the certificate types */ | |
2064 | ctype_num = *(p++); | |
b548a1f1 RS |
2065 | OPENSSL_free(s->cert->ctypes); |
2066 | s->cert->ctypes = NULL; | |
0f113f3e MC |
2067 | if (ctype_num > SSL3_CT_NUMBER) { |
2068 | /* If we exceed static buffer copy all to cert structure */ | |
2069 | s->cert->ctypes = OPENSSL_malloc(ctype_num); | |
2070 | if (s->cert->ctypes == NULL) { | |
2071 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); | |
2072 | goto err; | |
2073 | } | |
2074 | memcpy(s->cert->ctypes, p, ctype_num); | |
2075 | s->cert->ctype_num = (size_t)ctype_num; | |
2076 | ctype_num = SSL3_CT_NUMBER; | |
2077 | } | |
2078 | for (i = 0; i < ctype_num; i++) | |
2079 | s->s3->tmp.ctype[i] = p[i]; | |
2080 | p += p[-1]; | |
2081 | if (SSL_USE_SIGALGS(s)) { | |
2082 | n2s(p, llen); | |
2083 | /* | |
2084 | * Check we have enough room for signature algorithms and following | |
2085 | * length value. | |
2086 | */ | |
2087 | if ((unsigned long)(p - d + llen + 2) > n) { | |
2088 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2089 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, | |
2090 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2091 | goto err; | |
2092 | } | |
2093 | /* Clear certificate digests and validity flags */ | |
2094 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
2095 | s->cert->pkeys[i].digest = NULL; | |
2096 | s->cert->pkeys[i].valid_flags = 0; | |
2097 | } | |
2098 | if ((llen & 1) || !tls1_save_sigalgs(s, p, llen)) { | |
2099 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2100 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, | |
2101 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); | |
2102 | goto err; | |
2103 | } | |
2104 | if (!tls1_process_sigalgs(s)) { | |
2105 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2106 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); | |
2107 | goto err; | |
2108 | } | |
2109 | p += llen; | |
2110 | } | |
2111 | ||
2112 | /* get the CA RDNs */ | |
2113 | n2s(p, llen); | |
0f113f3e MC |
2114 | |
2115 | if ((unsigned long)(p - d + llen) != n) { | |
2116 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2117 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); | |
2118 | goto err; | |
2119 | } | |
2120 | ||
2121 | for (nc = 0; nc < llen;) { | |
2122 | n2s(p, l); | |
2123 | if ((l + nc + 2) > llen) { | |
0f113f3e MC |
2124 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
2125 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_CA_DN_TOO_LONG); | |
2126 | goto err; | |
2127 | } | |
2128 | ||
2129 | q = p; | |
2130 | ||
2131 | if ((xn = d2i_X509_NAME(NULL, &q, l)) == NULL) { | |
3c33c6f6 MC |
2132 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
2133 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); | |
2134 | goto err; | |
0f113f3e MC |
2135 | } |
2136 | ||
2137 | if (q != (p + l)) { | |
2138 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2139 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, | |
2140 | SSL_R_CA_DN_LENGTH_MISMATCH); | |
2141 | goto err; | |
2142 | } | |
2143 | if (!sk_X509_NAME_push(ca_sk, xn)) { | |
2144 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); | |
2145 | goto err; | |
2146 | } | |
2147 | ||
2148 | p += l; | |
2149 | nc += l + 2; | |
2150 | } | |
2151 | ||
0f113f3e MC |
2152 | /* we should setup a certificate to return.... */ |
2153 | s->s3->tmp.cert_req = 1; | |
2154 | s->s3->tmp.ctype_num = ctype_num; | |
222561fe | 2155 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
0f113f3e MC |
2156 | s->s3->tmp.ca_names = ca_sk; |
2157 | ca_sk = NULL; | |
2158 | ||
2159 | ret = 1; | |
cc273a93 | 2160 | goto done; |
0f113f3e | 2161 | err: |
cc273a93 MC |
2162 | s->state = SSL_ST_ERR; |
2163 | done: | |
222561fe | 2164 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
0f113f3e MC |
2165 | return (ret); |
2166 | } | |
2167 | ||
2168 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
dfeab068 | 2169 | { |
0f113f3e | 2170 | return (X509_NAME_cmp(*a, *b)); |
dfeab068 | 2171 | } |
dfeab068 | 2172 | |
6434abbf DSH |
2173 | #ifndef OPENSSL_NO_TLSEXT |
2174 | int ssl3_get_new_session_ticket(SSL *s) | |
0f113f3e MC |
2175 | { |
2176 | int ok, al, ret = 0, ticklen; | |
2177 | long n; | |
2178 | const unsigned char *p; | |
2179 | unsigned char *d; | |
2180 | ||
2181 | n = s->method->ssl_get_message(s, | |
2182 | SSL3_ST_CR_SESSION_TICKET_A, | |
2183 | SSL3_ST_CR_SESSION_TICKET_B, | |
2184 | SSL3_MT_NEWSESSION_TICKET, 16384, &ok); | |
2185 | ||
2186 | if (!ok) | |
2187 | return ((int)n); | |
2188 | ||
2189 | if (n < 6) { | |
2190 | /* need at least ticket_lifetime_hint + ticket length */ | |
2191 | al = SSL_AD_DECODE_ERROR; | |
2192 | SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); | |
2193 | goto f_err; | |
2194 | } | |
2195 | ||
2196 | p = d = (unsigned char *)s->init_msg; | |
2197 | n2l(p, s->session->tlsext_tick_lifetime_hint); | |
2198 | n2s(p, ticklen); | |
2199 | /* ticket_lifetime_hint + ticket_length + ticket */ | |
2200 | if (ticklen + 6 != n) { | |
2201 | al = SSL_AD_DECODE_ERROR; | |
2202 | SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); | |
2203 | goto f_err; | |
2204 | } | |
b548a1f1 RS |
2205 | OPENSSL_free(s->session->tlsext_tick); |
2206 | s->session->tlsext_ticklen = 0; | |
0f113f3e MC |
2207 | s->session->tlsext_tick = OPENSSL_malloc(ticklen); |
2208 | if (!s->session->tlsext_tick) { | |
2209 | SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); | |
2210 | goto err; | |
2211 | } | |
2212 | memcpy(s->session->tlsext_tick, p, ticklen); | |
2213 | s->session->tlsext_ticklen = ticklen; | |
2214 | /* | |
2215 | * There are two ways to detect a resumed ticket session. One is to set | |
2216 | * an appropriate session ID and then the server must return a match in | |
2217 | * ServerHello. This allows the normal client session ID matching to work | |
2218 | * and we know much earlier that the ticket has been accepted. The | |
2219 | * other way is to set zero length session ID when the ticket is | |
2220 | * presented and rely on the handshake to determine session resumption. | |
2221 | * We choose the former approach because this fits in with assumptions | |
2222 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
2223 | * SHA256 is disabled) hash of the ticket. | |
2224 | */ | |
2225 | EVP_Digest(p, ticklen, | |
2226 | s->session->session_id, &s->session->session_id_length, | |
0f113f3e | 2227 | EVP_sha256(), NULL); |
0f113f3e MC |
2228 | ret = 1; |
2229 | return (ret); | |
2230 | f_err: | |
2231 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
2232 | err: | |
cc273a93 | 2233 | s->state = SSL_ST_ERR; |
0f113f3e MC |
2234 | return (-1); |
2235 | } | |
67c8e7f4 DSH |
2236 | |
2237 | int ssl3_get_cert_status(SSL *s) | |
0f113f3e MC |
2238 | { |
2239 | int ok, al; | |
2240 | unsigned long resplen, n; | |
2241 | const unsigned char *p; | |
2242 | ||
2243 | n = s->method->ssl_get_message(s, | |
2244 | SSL3_ST_CR_CERT_STATUS_A, | |
2245 | SSL3_ST_CR_CERT_STATUS_B, | |
2246 | SSL3_MT_CERTIFICATE_STATUS, 16384, &ok); | |
2247 | ||
2248 | if (!ok) | |
2249 | return ((int)n); | |
2250 | if (n < 4) { | |
2251 | /* need at least status type + length */ | |
2252 | al = SSL_AD_DECODE_ERROR; | |
2253 | SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH); | |
2254 | goto f_err; | |
2255 | } | |
2256 | p = (unsigned char *)s->init_msg; | |
2257 | if (*p++ != TLSEXT_STATUSTYPE_ocsp) { | |
2258 | al = SSL_AD_DECODE_ERROR; | |
2259 | SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE); | |
2260 | goto f_err; | |
2261 | } | |
2262 | n2l3(p, resplen); | |
2263 | if (resplen + 4 != n) { | |
2264 | al = SSL_AD_DECODE_ERROR; | |
2265 | SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_LENGTH_MISMATCH); | |
2266 | goto f_err; | |
2267 | } | |
b548a1f1 | 2268 | OPENSSL_free(s->tlsext_ocsp_resp); |
0f113f3e MC |
2269 | s->tlsext_ocsp_resp = BUF_memdup(p, resplen); |
2270 | if (!s->tlsext_ocsp_resp) { | |
2271 | al = SSL_AD_INTERNAL_ERROR; | |
2272 | SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE); | |
2273 | goto f_err; | |
2274 | } | |
2275 | s->tlsext_ocsp_resplen = resplen; | |
2276 | if (s->ctx->tlsext_status_cb) { | |
2277 | int ret; | |
2278 | ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); | |
2279 | if (ret == 0) { | |
2280 | al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; | |
2281 | SSLerr(SSL_F_SSL3_GET_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE); | |
2282 | goto f_err; | |
2283 | } | |
2284 | if (ret < 0) { | |
2285 | al = SSL_AD_INTERNAL_ERROR; | |
2286 | SSLerr(SSL_F_SSL3_GET_CERT_STATUS, ERR_R_MALLOC_FAILURE); | |
2287 | goto f_err; | |
2288 | } | |
2289 | } | |
2290 | return 1; | |
2291 | f_err: | |
2292 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
cc273a93 | 2293 | s->state = SSL_ST_ERR; |
0f113f3e MC |
2294 | return (-1); |
2295 | } | |
6434abbf | 2296 | #endif |
d02b48c6 | 2297 | |
36d16f8e | 2298 | int ssl3_get_server_done(SSL *s) |
0f113f3e MC |
2299 | { |
2300 | int ok, ret = 0; | |
2301 | long n; | |
2302 | ||
2303 | /* Second to last param should be very small, like 0 :-) */ | |
2304 | n = s->method->ssl_get_message(s, | |
2305 | SSL3_ST_CR_SRVR_DONE_A, | |
2306 | SSL3_ST_CR_SRVR_DONE_B, | |
2307 | SSL3_MT_SERVER_DONE, 30, &ok); | |
2308 | ||
2309 | if (!ok) | |
2310 | return ((int)n); | |
2311 | if (n > 0) { | |
2312 | /* should contain no data */ | |
2313 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
2314 | SSLerr(SSL_F_SSL3_GET_SERVER_DONE, SSL_R_LENGTH_MISMATCH); | |
cc273a93 | 2315 | s->state = SSL_ST_ERR; |
0f113f3e MC |
2316 | return -1; |
2317 | } | |
2318 | ret = 1; | |
2319 | return (ret); | |
2320 | } | |
176f31dd | 2321 | |
36d16f8e | 2322 | int ssl3_send_client_key_exchange(SSL *s) |
0f113f3e MC |
2323 | { |
2324 | unsigned char *p; | |
2325 | int n; | |
2326 | unsigned long alg_k; | |
bc36ee62 | 2327 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
2328 | unsigned char *q; |
2329 | EVP_PKEY *pkey = NULL; | |
79df9d62 | 2330 | #endif |
bc36ee62 | 2331 | #ifndef OPENSSL_NO_KRB5 |
0f113f3e MC |
2332 | KSSL_ERR kssl_err; |
2333 | #endif /* OPENSSL_NO_KRB5 */ | |
10bf4fc2 | 2334 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
2335 | EC_KEY *clnt_ecdh = NULL; |
2336 | const EC_POINT *srvr_ecpoint = NULL; | |
2337 | EVP_PKEY *srvr_pub_pkey = NULL; | |
2338 | unsigned char *encodedPoint = NULL; | |
2339 | int encoded_pt_len = 0; | |
2340 | BN_CTX *bn_ctx = NULL; | |
ea262260 | 2341 | #endif |
c660ec63 DSH |
2342 | unsigned char *pms = NULL; |
2343 | size_t pmslen = 0; | |
d02b48c6 | 2344 | |
0f113f3e MC |
2345 | if (s->state == SSL3_ST_CW_KEY_EXCH_A) { |
2346 | p = ssl_handshake_start(s); | |
d02b48c6 | 2347 | |
0f113f3e | 2348 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
d02b48c6 | 2349 | |
0f113f3e MC |
2350 | /* Fool emacs indentation */ |
2351 | if (0) { | |
2352 | } | |
bc36ee62 | 2353 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
2354 | else if (alg_k & SSL_kRSA) { |
2355 | RSA *rsa; | |
c660ec63 DSH |
2356 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2357 | pms = OPENSSL_malloc(pmslen); | |
2358 | if (!pms) | |
2359 | goto memerr; | |
0f113f3e MC |
2360 | |
2361 | if (s->session->sess_cert == NULL) { | |
2362 | /* | |
2363 | * We should always have a server certificate with SSL_kRSA. | |
2364 | */ | |
2365 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2366 | ERR_R_INTERNAL_ERROR); | |
2367 | goto err; | |
2368 | } | |
2369 | ||
2370 | if (s->session->sess_cert->peer_rsa_tmp != NULL) | |
2371 | rsa = s->session->sess_cert->peer_rsa_tmp; | |
2372 | else { | |
2373 | pkey = | |
2374 | X509_get_pubkey(s->session-> | |
2375 | sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC]. | |
2376 | x509); | |
2377 | if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA) | |
2378 | || (pkey->pkey.rsa == NULL)) { | |
2379 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2380 | ERR_R_INTERNAL_ERROR); | |
2381 | goto err; | |
2382 | } | |
2383 | rsa = pkey->pkey.rsa; | |
2384 | EVP_PKEY_free(pkey); | |
2385 | } | |
2386 | ||
c660ec63 DSH |
2387 | pms[0] = s->client_version >> 8; |
2388 | pms[1] = s->client_version & 0xff; | |
2389 | if (RAND_bytes(pms + 2, pmslen - 2) <= 0) | |
0f113f3e MC |
2390 | goto err; |
2391 | ||
0f113f3e MC |
2392 | q = p; |
2393 | /* Fix buf for TLS and beyond */ | |
2394 | if (s->version > SSL3_VERSION) | |
2395 | p += 2; | |
c660ec63 | 2396 | n = RSA_public_encrypt(pmslen, pms, p, rsa, RSA_PKCS1_PADDING); |
0f113f3e MC |
2397 | # ifdef PKCS1_CHECK |
2398 | if (s->options & SSL_OP_PKCS1_CHECK_1) | |
2399 | p[1]++; | |
2400 | if (s->options & SSL_OP_PKCS1_CHECK_2) | |
2401 | tmp_buf[0] = 0x70; | |
2402 | # endif | |
2403 | if (n <= 0) { | |
2404 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2405 | SSL_R_BAD_RSA_ENCRYPT); | |
2406 | goto err; | |
2407 | } | |
2408 | ||
2409 | /* Fix buf for TLS and beyond */ | |
2410 | if (s->version > SSL3_VERSION) { | |
2411 | s2n(n, q); | |
2412 | n += 2; | |
2413 | } | |
0f113f3e | 2414 | } |
f9b3bff6 | 2415 | #endif |
bc36ee62 | 2416 | #ifndef OPENSSL_NO_KRB5 |
0f113f3e MC |
2417 | else if (alg_k & SSL_kKRB5) { |
2418 | krb5_error_code krb5rc; | |
2419 | KSSL_CTX *kssl_ctx = s->kssl_ctx; | |
2420 | /* krb5_data krb5_ap_req; */ | |
2421 | krb5_data *enc_ticket; | |
2422 | krb5_data authenticator, *authp = NULL; | |
2423 | EVP_CIPHER_CTX ciph_ctx; | |
2424 | const EVP_CIPHER *enc = NULL; | |
2425 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
2426 | unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; | |
2427 | unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH + EVP_MAX_IV_LENGTH]; | |
2428 | int padl, outl = sizeof(epms); | |
2429 | ||
2430 | EVP_CIPHER_CTX_init(&ciph_ctx); | |
2431 | ||
2432 | # ifdef KSSL_DEBUG | |
2433 | fprintf(stderr, "ssl3_send_client_key_exchange(%lx & %lx)\n", | |
2434 | alg_k, SSL_kKRB5); | |
2435 | # endif /* KSSL_DEBUG */ | |
2436 | ||
2437 | authp = NULL; | |
2438 | # ifdef KRB5SENDAUTH | |
2439 | if (KRB5SENDAUTH) | |
2440 | authp = &authenticator; | |
2441 | # endif /* KRB5SENDAUTH */ | |
2442 | ||
2443 | krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, &kssl_err); | |
2444 | enc = kssl_map_enc(kssl_ctx->enctype); | |
2445 | if (enc == NULL) | |
2446 | goto err; | |
2447 | # ifdef KSSL_DEBUG | |
2448 | { | |
2449 | fprintf(stderr, "kssl_cget_tkt rtn %d\n", krb5rc); | |
2450 | if (krb5rc && kssl_err.text) | |
2451 | fprintf(stderr, "kssl_cget_tkt kssl_err=%s\n", | |
2452 | kssl_err.text); | |
2453 | } | |
2454 | # endif /* KSSL_DEBUG */ | |
2455 | ||
2456 | if (krb5rc) { | |
2457 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2458 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, kssl_err.reason); | |
2459 | goto err; | |
2460 | } | |
2461 | ||
50e735f9 MC |
2462 | /*- |
2463 | * 20010406 VRS - Earlier versions used KRB5 AP_REQ | |
2464 | * in place of RFC 2712 KerberosWrapper, as in: | |
2465 | * | |
2466 | * Send ticket (copy to *p, set n = length) | |
2467 | * n = krb5_ap_req.length; | |
2468 | * memcpy(p, krb5_ap_req.data, krb5_ap_req.length); | |
2469 | * if (krb5_ap_req.data) | |
2470 | * kssl_krb5_free_data_contents(NULL,&krb5_ap_req); | |
2471 | * | |
2472 | * Now using real RFC 2712 KerberosWrapper | |
2473 | * (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) | |
2474 | * Note: 2712 "opaque" types are here replaced | |
2475 | * with a 2-byte length followed by the value. | |
2476 | * Example: | |
2477 | * KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms | |
2478 | * Where "xx xx" = length bytes. Shown here with | |
2479 | * optional authenticator omitted. | |
2480 | */ | |
0f113f3e MC |
2481 | |
2482 | /* KerberosWrapper.Ticket */ | |
2483 | s2n(enc_ticket->length, p); | |
2484 | memcpy(p, enc_ticket->data, enc_ticket->length); | |
2485 | p += enc_ticket->length; | |
2486 | n = enc_ticket->length + 2; | |
2487 | ||
2488 | /* KerberosWrapper.Authenticator */ | |
2489 | if (authp && authp->length) { | |
2490 | s2n(authp->length, p); | |
2491 | memcpy(p, authp->data, authp->length); | |
2492 | p += authp->length; | |
2493 | n += authp->length + 2; | |
2494 | ||
2495 | free(authp->data); | |
2496 | authp->data = NULL; | |
2497 | authp->length = 0; | |
2498 | } else { | |
2499 | s2n(0, p); /* null authenticator length */ | |
2500 | n += 2; | |
2501 | } | |
2502 | ||
c660ec63 DSH |
2503 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; |
2504 | pms = OPENSSL_malloc(pmslen); | |
2505 | if (!pms) | |
2506 | goto memerr; | |
2507 | ||
2508 | pms[0] = s->client_version >> 8; | |
2509 | pms[1] = s->client_version & 0xff; | |
2510 | if (RAND_bytes(pms + 2, pmslen - 2) <= 0) | |
0f113f3e MC |
2511 | goto err; |
2512 | ||
35a1cc90 MC |
2513 | /*- |
2514 | * 20010420 VRS. Tried it this way; failed. | |
2515 | * EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); | |
2516 | * EVP_CIPHER_CTX_set_key_length(&ciph_ctx, | |
2517 | * kssl_ctx->length); | |
2518 | * EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); | |
2519 | */ | |
0f113f3e | 2520 | |
16f8d4eb | 2521 | memset(iv, 0, sizeof(iv)); /* per RFC 1510 */ |
0f113f3e | 2522 | EVP_EncryptInit_ex(&ciph_ctx, enc, NULL, kssl_ctx->key, iv); |
c660ec63 | 2523 | EVP_EncryptUpdate(&ciph_ctx, epms, &outl, pms, pmslen); |
0f113f3e MC |
2524 | EVP_EncryptFinal_ex(&ciph_ctx, &(epms[outl]), &padl); |
2525 | outl += padl; | |
2526 | if (outl > (int)sizeof epms) { | |
2527 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2528 | ERR_R_INTERNAL_ERROR); | |
2529 | goto err; | |
2530 | } | |
2531 | EVP_CIPHER_CTX_cleanup(&ciph_ctx); | |
2532 | ||
2533 | /* KerberosWrapper.EncryptedPreMasterSecret */ | |
2534 | s2n(outl, p); | |
2535 | memcpy(p, epms, outl); | |
2536 | p += outl; | |
2537 | n += outl + 2; | |
0f113f3e MC |
2538 | OPENSSL_cleanse(epms, outl); |
2539 | } | |
d02b48c6 | 2540 | #endif |
bc36ee62 | 2541 | #ifndef OPENSSL_NO_DH |
0f113f3e MC |
2542 | else if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd)) { |
2543 | DH *dh_srvr, *dh_clnt; | |
2544 | SESS_CERT *scert = s->session->sess_cert; | |
2545 | ||
2546 | if (scert == NULL) { | |
2547 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); | |
2548 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2549 | SSL_R_UNEXPECTED_MESSAGE); | |
2550 | goto err; | |
2551 | } | |
2552 | ||
2553 | if (scert->peer_dh_tmp != NULL) | |
2554 | dh_srvr = scert->peer_dh_tmp; | |
2555 | else { | |
2556 | /* we get them from the cert */ | |
2557 | int idx = scert->peer_cert_type; | |
2558 | EVP_PKEY *spkey = NULL; | |
2559 | dh_srvr = NULL; | |
2560 | if (idx >= 0) | |
2561 | spkey = X509_get_pubkey(scert->peer_pkeys[idx].x509); | |
2562 | if (spkey) { | |
2563 | dh_srvr = EVP_PKEY_get1_DH(spkey); | |
2564 | EVP_PKEY_free(spkey); | |
2565 | } | |
2566 | if (dh_srvr == NULL) { | |
2567 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2568 | ERR_R_INTERNAL_ERROR); | |
2569 | goto err; | |
2570 | } | |
2571 | } | |
2572 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { | |
2573 | /* Use client certificate key */ | |
2574 | EVP_PKEY *clkey = s->cert->key->privatekey; | |
2575 | dh_clnt = NULL; | |
2576 | if (clkey) | |
2577 | dh_clnt = EVP_PKEY_get1_DH(clkey); | |
2578 | if (dh_clnt == NULL) { | |
2579 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2580 | ERR_R_INTERNAL_ERROR); | |
2581 | goto err; | |
2582 | } | |
2583 | } else { | |
2584 | /* generate a new random key */ | |
2585 | if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) { | |
2586 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); | |
2587 | goto err; | |
2588 | } | |
2589 | if (!DH_generate_key(dh_clnt)) { | |
2590 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); | |
2591 | DH_free(dh_clnt); | |
2592 | goto err; | |
2593 | } | |
2594 | } | |
2595 | ||
c660ec63 DSH |
2596 | pmslen = DH_size(dh_clnt); |
2597 | pms = OPENSSL_malloc(pmslen); | |
2598 | if (!pms) | |
2599 | goto memerr; | |
2600 | ||
0f113f3e MC |
2601 | /* |
2602 | * use the 'p' output buffer for the DH key, but make sure to | |
2603 | * clear it out afterwards | |
2604 | */ | |
2605 | ||
c660ec63 | 2606 | n = DH_compute_key(pms, dh_srvr->pub_key, dh_clnt); |
0f113f3e MC |
2607 | if (scert->peer_dh_tmp == NULL) |
2608 | DH_free(dh_srvr); | |
2609 | ||
2610 | if (n <= 0) { | |
2611 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); | |
2612 | DH_free(dh_clnt); | |
2613 | goto err; | |
2614 | } | |
6b937f8b | 2615 | pmslen = n; |
0f113f3e | 2616 | |
0f113f3e MC |
2617 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) |
2618 | n = 0; | |
2619 | else { | |
2620 | /* send off the data */ | |
2621 | n = BN_num_bytes(dh_clnt->pub_key); | |
2622 | s2n(n, p); | |
2623 | BN_bn2bin(dh_clnt->pub_key, p); | |
2624 | n += 2; | |
2625 | } | |
2626 | ||
2627 | DH_free(dh_clnt); | |
2628 | ||
2629 | /* perhaps clean things up a bit EAY EAY EAY EAY */ | |
2630 | } | |
d02b48c6 | 2631 | #endif |
ea262260 | 2632 | |
10bf4fc2 | 2633 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
2634 | else if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe)) { |
2635 | const EC_GROUP *srvr_group = NULL; | |
2636 | EC_KEY *tkey; | |
2637 | int ecdh_clnt_cert = 0; | |
2638 | int field_size = 0; | |
2639 | ||
2640 | if (s->session->sess_cert == NULL) { | |
2641 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); | |
2642 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2643 | SSL_R_UNEXPECTED_MESSAGE); | |
2644 | goto err; | |
2645 | } | |
2646 | ||
2647 | /* | |
2648 | * Did we send out the client's ECDH share for use in premaster | |
2649 | * computation as part of client certificate? If so, set | |
2650 | * ecdh_clnt_cert to 1. | |
2651 | */ | |
2652 | if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) { | |
50e735f9 MC |
2653 | /*- |
2654 | * XXX: For now, we do not support client | |
2655 | * authentication using ECDH certificates. | |
2656 | * To add such support, one needs to add | |
2657 | * code that checks for appropriate | |
2658 | * conditions and sets ecdh_clnt_cert to 1. | |
2659 | * For example, the cert have an ECC | |
2660 | * key on the same curve as the server's | |
2661 | * and the key should be authorized for | |
2662 | * key agreement. | |
2663 | * | |
2664 | * One also needs to add code in ssl3_connect | |
2665 | * to skip sending the certificate verify | |
2666 | * message. | |
2667 | * | |
2668 | * if ((s->cert->key->privatekey != NULL) && | |
2669 | * (s->cert->key->privatekey->type == | |
2670 | * EVP_PKEY_EC) && ...) | |
2671 | * ecdh_clnt_cert = 1; | |
2672 | */ | |
0f113f3e MC |
2673 | } |
2674 | ||
2675 | if (s->session->sess_cert->peer_ecdh_tmp != NULL) { | |
2676 | tkey = s->session->sess_cert->peer_ecdh_tmp; | |
2677 | } else { | |
2678 | /* Get the Server Public Key from Cert */ | |
2679 | srvr_pub_pkey = | |
2680 | X509_get_pubkey(s->session-> | |
2681 | sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); | |
2682 | if ((srvr_pub_pkey == NULL) | |
2683 | || (srvr_pub_pkey->type != EVP_PKEY_EC) | |
2684 | || (srvr_pub_pkey->pkey.ec == NULL)) { | |
2685 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2686 | ERR_R_INTERNAL_ERROR); | |
2687 | goto err; | |
2688 | } | |
2689 | ||
2690 | tkey = srvr_pub_pkey->pkey.ec; | |
2691 | } | |
2692 | ||
2693 | srvr_group = EC_KEY_get0_group(tkey); | |
2694 | srvr_ecpoint = EC_KEY_get0_public_key(tkey); | |
2695 | ||
2696 | if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) { | |
2697 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2698 | ERR_R_INTERNAL_ERROR); | |
2699 | goto err; | |
2700 | } | |
2701 | ||
2702 | if ((clnt_ecdh = EC_KEY_new()) == NULL) { | |
2703 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2704 | ERR_R_MALLOC_FAILURE); | |
2705 | goto err; | |
2706 | } | |
2707 | ||
2708 | if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) { | |
2709 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); | |
2710 | goto err; | |
2711 | } | |
2712 | if (ecdh_clnt_cert) { | |
2713 | /* | |
2714 | * Reuse key info from our certificate We only need our | |
2715 | * private key to perform the ECDH computation. | |
2716 | */ | |
2717 | const BIGNUM *priv_key; | |
2718 | tkey = s->cert->key->privatekey->pkey.ec; | |
2719 | priv_key = EC_KEY_get0_private_key(tkey); | |
2720 | if (priv_key == NULL) { | |
2721 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2722 | ERR_R_MALLOC_FAILURE); | |
2723 | goto err; | |
2724 | } | |
2725 | if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) { | |
2726 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); | |
2727 | goto err; | |
2728 | } | |
2729 | } else { | |
2730 | /* Generate a new ECDH key pair */ | |
2731 | if (!(EC_KEY_generate_key(clnt_ecdh))) { | |
2732 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2733 | ERR_R_ECDH_LIB); | |
2734 | goto err; | |
2735 | } | |
2736 | } | |
2737 | ||
2738 | /* | |
2739 | * use the 'p' output buffer for the ECDH key, but make sure to | |
2740 | * clear it out afterwards | |
2741 | */ | |
2742 | ||
2743 | field_size = EC_GROUP_get_degree(srvr_group); | |
2744 | if (field_size <= 0) { | |
2745 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); | |
2746 | goto err; | |
2747 | } | |
c660ec63 DSH |
2748 | pmslen = (field_size + 7) / 8; |
2749 | pms = OPENSSL_malloc(pmslen); | |
2750 | if (!pms) | |
2751 | goto memerr; | |
2752 | n = ECDH_compute_key(pms, pmslen, srvr_ecpoint, clnt_ecdh, NULL); | |
2753 | if (n <= 0 || pmslen != (size_t)n) { | |
0f113f3e MC |
2754 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); |
2755 | goto err; | |
2756 | } | |
2757 | ||
0f113f3e MC |
2758 | if (ecdh_clnt_cert) { |
2759 | /* Send empty client key exch message */ | |
2760 | n = 0; | |
2761 | } else { | |
2762 | /* | |
2763 | * First check the size of encoding and allocate memory | |
2764 | * accordingly. | |
2765 | */ | |
2766 | encoded_pt_len = | |
2767 | EC_POINT_point2oct(srvr_group, | |
2768 | EC_KEY_get0_public_key(clnt_ecdh), | |
2769 | POINT_CONVERSION_UNCOMPRESSED, | |
2770 | NULL, 0, NULL); | |
2771 | ||
2772 | encodedPoint = (unsigned char *) | |
2773 | OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char)); | |
2774 | bn_ctx = BN_CTX_new(); | |
2775 | if ((encodedPoint == NULL) || (bn_ctx == NULL)) { | |
2776 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2777 | ERR_R_MALLOC_FAILURE); | |
2778 | goto err; | |
2779 | } | |
2780 | ||
2781 | /* Encode the public key */ | |
2782 | n = EC_POINT_point2oct(srvr_group, | |
2783 | EC_KEY_get0_public_key(clnt_ecdh), | |
2784 | POINT_CONVERSION_UNCOMPRESSED, | |
2785 | encodedPoint, encoded_pt_len, bn_ctx); | |
2786 | ||
2787 | *p = n; /* length of encoded point */ | |
2788 | /* Encoded point will be copied here */ | |
2789 | p += 1; | |
2790 | /* copy the point */ | |
16f8d4eb | 2791 | memcpy(p, encodedPoint, n); |
0f113f3e MC |
2792 | /* increment n to account for length field */ |
2793 | n += 1; | |
2794 | } | |
2795 | ||
2796 | /* Free allocated memory */ | |
2797 | BN_CTX_free(bn_ctx); | |
b548a1f1 | 2798 | OPENSSL_free(encodedPoint); |
8fdc3734 | 2799 | EC_KEY_free(clnt_ecdh); |
0f113f3e MC |
2800 | EVP_PKEY_free(srvr_pub_pkey); |
2801 | } | |
10bf4fc2 | 2802 | #endif /* !OPENSSL_NO_EC */ |
0f113f3e MC |
2803 | else if (alg_k & SSL_kGOST) { |
2804 | /* GOST key exchange message creation */ | |
2805 | EVP_PKEY_CTX *pkey_ctx; | |
2806 | X509 *peer_cert; | |
2807 | size_t msglen; | |
2808 | unsigned int md_len; | |
2809 | int keytype; | |
c660ec63 | 2810 | unsigned char shared_ukm[32], tmp[256]; |
0f113f3e MC |
2811 | EVP_MD_CTX *ukm_hash; |
2812 | EVP_PKEY *pub_key; | |
2813 | ||
c660ec63 DSH |
2814 | pmslen = 32; |
2815 | pms = OPENSSL_malloc(pmslen); | |
2816 | if (!pms) | |
2817 | goto memerr; | |
2818 | ||
0f113f3e MC |
2819 | /* |
2820 | * Get server sertificate PKEY and create ctx from it | |
2821 | */ | |
2822 | peer_cert = | |
2823 | s->session-> | |
2824 | sess_cert->peer_pkeys[(keytype = SSL_PKEY_GOST01)].x509; | |
2825 | if (!peer_cert) | |
2826 | peer_cert = | |
2827 | s->session-> | |
2828 | sess_cert->peer_pkeys[(keytype = SSL_PKEY_GOST94)].x509; | |
2829 | if (!peer_cert) { | |
2830 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2831 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); | |
2832 | goto err; | |
2833 | } | |
2834 | ||
2835 | pkey_ctx = EVP_PKEY_CTX_new(pub_key = | |
2836 | X509_get_pubkey(peer_cert), NULL); | |
2837 | /* | |
2838 | * If we have send a certificate, and certificate key | |
2839 | * | |
2840 | * * parameters match those of server certificate, use | |
2841 | * certificate key for key exchange | |
2842 | */ | |
2843 | ||
2844 | /* Otherwise, generate ephemeral key pair */ | |
2845 | ||
2846 | EVP_PKEY_encrypt_init(pkey_ctx); | |
2847 | /* Generate session key */ | |
266483d2 MC |
2848 | if (RAND_bytes(pms, pmslen) <= 0) { |
2849 | EVP_PKEY_CTX_free(pkey_ctx); | |
2850 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2851 | ERR_R_INTERNAL_ERROR); | |
2852 | goto err; | |
2853 | }; | |
0f113f3e MC |
2854 | /* |
2855 | * If we have client certificate, use its secret as peer key | |
2856 | */ | |
2857 | if (s->s3->tmp.cert_req && s->cert->key->privatekey) { | |
2858 | if (EVP_PKEY_derive_set_peer | |
2859 | (pkey_ctx, s->cert->key->privatekey) <= 0) { | |
2860 | /* | |
2861 | * If there was an error - just ignore it. Ephemeral key | |
2862 | * * would be used | |
2863 | */ | |
2864 | ERR_clear_error(); | |
2865 | } | |
2866 | } | |
2867 | /* | |
2868 | * Compute shared IV and store it in algorithm-specific context | |
2869 | * data | |
2870 | */ | |
2871 | ukm_hash = EVP_MD_CTX_create(); | |
2872 | EVP_DigestInit(ukm_hash, | |
2873 | EVP_get_digestbynid(NID_id_GostR3411_94)); | |
2874 | EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
2875 | SSL3_RANDOM_SIZE); | |
2876 | EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2877 | SSL3_RANDOM_SIZE); | |
2878 | EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); | |
2879 | EVP_MD_CTX_destroy(ukm_hash); | |
2880 | if (EVP_PKEY_CTX_ctrl | |
2881 | (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8, | |
2882 | shared_ukm) < 0) { | |
2883 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2884 | SSL_R_LIBRARY_BUG); | |
2885 | goto err; | |
2886 | } | |
2887 | /* Make GOST keytransport blob message */ | |
2888 | /* | |
2889 | * Encapsulate it into sequence | |
2890 | */ | |
2891 | *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; | |
2892 | msglen = 255; | |
c660ec63 | 2893 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) < 0) { |
0f113f3e MC |
2894 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, |
2895 | SSL_R_LIBRARY_BUG); | |
2896 | goto err; | |
2897 | } | |
2898 | if (msglen >= 0x80) { | |
2899 | *(p++) = 0x81; | |
2900 | *(p++) = msglen & 0xff; | |
2901 | n = msglen + 3; | |
2902 | } else { | |
2903 | *(p++) = msglen & 0xff; | |
2904 | n = msglen + 2; | |
2905 | } | |
2906 | memcpy(p, tmp, msglen); | |
2907 | /* Check if pubkey from client certificate was used */ | |
2908 | if (EVP_PKEY_CTX_ctrl | |
2909 | (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) { | |
2910 | /* Set flag "skip certificate verify" */ | |
2911 | s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; | |
2912 | } | |
2913 | EVP_PKEY_CTX_free(pkey_ctx); | |
0f113f3e MC |
2914 | EVP_PKEY_free(pub_key); |
2915 | ||
2916 | } | |
edc032b5 | 2917 | #ifndef OPENSSL_NO_SRP |
0f113f3e MC |
2918 | else if (alg_k & SSL_kSRP) { |
2919 | if (s->srp_ctx.A != NULL) { | |
2920 | /* send off the data */ | |
2921 | n = BN_num_bytes(s->srp_ctx.A); | |
2922 | s2n(n, p); | |
2923 | BN_bn2bin(s->srp_ctx.A, p); | |
2924 | n += 2; | |
2925 | } else { | |
2926 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2927 | ERR_R_INTERNAL_ERROR); | |
2928 | goto err; | |
2929 | } | |
b548a1f1 | 2930 | OPENSSL_free(s->session->srp_username); |
0f113f3e MC |
2931 | s->session->srp_username = BUF_strdup(s->srp_ctx.login); |
2932 | if (s->session->srp_username == NULL) { | |
2933 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2934 | ERR_R_MALLOC_FAILURE); | |
2935 | goto err; | |
2936 | } | |
0f113f3e | 2937 | } |
edc032b5 | 2938 | #endif |
ddac1974 | 2939 | #ifndef OPENSSL_NO_PSK |
0f113f3e MC |
2940 | else if (alg_k & SSL_kPSK) { |
2941 | /* | |
2942 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
2943 | * \0-terminated identity. The last byte is for us for simulating | |
2944 | * strnlen. | |
2945 | */ | |
2946 | char identity[PSK_MAX_IDENTITY_LEN + 2]; | |
2947 | size_t identity_len; | |
2948 | unsigned char *t = NULL; | |
c660ec63 | 2949 | unsigned int psk_len = 0; |
0f113f3e MC |
2950 | int psk_err = 1; |
2951 | ||
2952 | n = 0; | |
2953 | if (s->psk_client_callback == NULL) { | |
2954 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2955 | SSL_R_PSK_NO_CLIENT_CB); | |
2956 | goto err; | |
2957 | } | |
2958 | ||
2959 | memset(identity, 0, sizeof(identity)); | |
c660ec63 DSH |
2960 | /* Allocate maximum size buffer */ |
2961 | pmslen = PSK_MAX_PSK_LEN * 2 + 4; | |
2962 | pms = OPENSSL_malloc(pmslen); | |
2963 | if (!pms) | |
2964 | goto memerr; | |
2965 | ||
0f113f3e MC |
2966 | psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint, |
2967 | identity, sizeof(identity) - 1, | |
c660ec63 | 2968 | pms, pmslen); |
0f113f3e MC |
2969 | if (psk_len > PSK_MAX_PSK_LEN) { |
2970 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2971 | ERR_R_INTERNAL_ERROR); | |
2972 | goto psk_err; | |
2973 | } else if (psk_len == 0) { | |
2974 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2975 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
2976 | goto psk_err; | |
2977 | } | |
c660ec63 DSH |
2978 | /* Change pmslen to real length */ |
2979 | pmslen = 2 + psk_len + 2 + psk_len; | |
0f113f3e MC |
2980 | identity[PSK_MAX_IDENTITY_LEN + 1] = '\0'; |
2981 | identity_len = strlen(identity); | |
2982 | if (identity_len > PSK_MAX_IDENTITY_LEN) { | |
2983 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
2984 | ERR_R_INTERNAL_ERROR); | |
2985 | goto psk_err; | |
2986 | } | |
2987 | /* create PSK pre_master_secret */ | |
c660ec63 DSH |
2988 | t = pms; |
2989 | memmove(pms + psk_len + 4, pms, psk_len); | |
0f113f3e MC |
2990 | s2n(psk_len, t); |
2991 | memset(t, 0, psk_len); | |
2992 | t += psk_len; | |
2993 | s2n(psk_len, t); | |
2994 | ||
b548a1f1 | 2995 | OPENSSL_free(s->session->psk_identity_hint); |
0f113f3e MC |
2996 | s->session->psk_identity_hint = |
2997 | BUF_strdup(s->ctx->psk_identity_hint); | |
2998 | if (s->ctx->psk_identity_hint != NULL | |
2999 | && s->session->psk_identity_hint == NULL) { | |
3000 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
3001 | ERR_R_MALLOC_FAILURE); | |
3002 | goto psk_err; | |
3003 | } | |
3004 | ||
b548a1f1 | 3005 | OPENSSL_free(s->session->psk_identity); |
0f113f3e MC |
3006 | s->session->psk_identity = BUF_strdup(identity); |
3007 | if (s->session->psk_identity == NULL) { | |
3008 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
3009 | ERR_R_MALLOC_FAILURE); | |
3010 | goto psk_err; | |
3011 | } | |
3012 | ||
0f113f3e MC |
3013 | s2n(identity_len, p); |
3014 | memcpy(p, identity, identity_len); | |
3015 | n = 2 + identity_len; | |
3016 | psk_err = 0; | |
3017 | psk_err: | |
3018 | OPENSSL_cleanse(identity, sizeof(identity)); | |
0f113f3e MC |
3019 | if (psk_err != 0) { |
3020 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
3021 | goto err; | |
3022 | } | |
3023 | } | |
3024 | #endif | |
3025 | else { | |
3026 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
3027 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
3028 | goto err; | |
3029 | } | |
3030 | ||
61986d32 | 3031 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) { |
77d514c5 MC |
3032 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); |
3033 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
3034 | goto err; | |
3035 | } | |
3036 | ||
0f113f3e MC |
3037 | s->state = SSL3_ST_CW_KEY_EXCH_B; |
3038 | } | |
3039 | ||
3040 | /* SSL3_ST_CW_KEY_EXCH_B */ | |
c660ec63 DSH |
3041 | n = ssl_do_write(s); |
3042 | #ifndef OPENSSL_NO_SRP | |
3043 | /* Check for SRP */ | |
3044 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
3045 | /* | |
3046 | * If everything written generate master key: no need to save PMS as | |
3047 | * SRP_generate_client_master_secret generates it internally. | |
3048 | */ | |
3049 | if (n > 0) { | |
3050 | if ((s->session->master_key_length = | |
3051 | SRP_generate_client_master_secret(s, | |
3052 | s->session->master_key)) < | |
3053 | 0) { | |
3054 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, | |
3055 | ERR_R_INTERNAL_ERROR); | |
3056 | goto err; | |
3057 | } | |
3058 | } | |
3059 | } else | |
3060 | #endif | |
3061 | /* If we haven't written everything save PMS */ | |
3062 | if (n <= 0) { | |
3063 | s->cert->pms = pms; | |
3064 | s->cert->pmslen = pmslen; | |
3065 | } else { | |
3066 | /* If we don't have a PMS restore */ | |
3067 | if (pms == NULL) { | |
3068 | pms = s->cert->pms; | |
3069 | pmslen = s->cert->pmslen; | |
3070 | } | |
3071 | if (pms == NULL) { | |
3072 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3073 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
3074 | goto err; | |
3075 | } | |
3076 | s->session->master_key_length = | |
3077 | s->method->ssl3_enc->generate_master_secret(s, | |
3078 | s-> | |
3079 | session->master_key, | |
3080 | pms, pmslen); | |
4b45c6e5 | 3081 | OPENSSL_clear_free(pms, pmslen); |
c660ec63 | 3082 | s->cert->pms = NULL; |
61986d32 | 3083 | if (s->session->master_key_length < 0) { |
69f68237 MC |
3084 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
3085 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
3086 | goto err; | |
3087 | } | |
c660ec63 DSH |
3088 | } |
3089 | return n; | |
3090 | memerr: | |
3091 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3092 | SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
0f113f3e | 3093 | err: |
4b45c6e5 RS |
3094 | OPENSSL_clear_free(pms, pmslen); |
3095 | s->cert->pms = NULL; | |
10bf4fc2 | 3096 | #ifndef OPENSSL_NO_EC |
0f113f3e | 3097 | BN_CTX_free(bn_ctx); |
b548a1f1 | 3098 | OPENSSL_free(encodedPoint); |
8fdc3734 | 3099 | EC_KEY_free(clnt_ecdh); |
0f113f3e MC |
3100 | EVP_PKEY_free(srvr_pub_pkey); |
3101 | #endif | |
cc273a93 | 3102 | s->state = SSL_ST_ERR; |
0f113f3e MC |
3103 | return (-1); |
3104 | } | |
d02b48c6 | 3105 | |
36d16f8e | 3106 | int ssl3_send_client_verify(SSL *s) |
0f113f3e MC |
3107 | { |
3108 | unsigned char *p; | |
3109 | unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH]; | |
3110 | EVP_PKEY *pkey; | |
3111 | EVP_PKEY_CTX *pctx = NULL; | |
3112 | EVP_MD_CTX mctx; | |
3113 | unsigned u = 0; | |
3114 | unsigned long n; | |
3115 | int j; | |
3116 | ||
3117 | EVP_MD_CTX_init(&mctx); | |
3118 | ||
3119 | if (s->state == SSL3_ST_CW_CERT_VRFY_A) { | |
3120 | p = ssl_handshake_start(s); | |
3121 | pkey = s->cert->key->privatekey; | |
0e1dba93 | 3122 | /* Create context from key and test if sha1 is allowed as digest */ |
0f113f3e MC |
3123 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
3124 | EVP_PKEY_sign_init(pctx); | |
3125 | if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1()) > 0) { | |
3126 | if (!SSL_USE_SIGALGS(s)) | |
3127 | s->method->ssl3_enc->cert_verify_mac(s, | |
3128 | NID_sha1, | |
3129 | &(data | |
3130 | [MD5_DIGEST_LENGTH])); | |
3131 | } else { | |
3132 | ERR_clear_error(); | |
3133 | } | |
3134 | /* | |
3135 | * For TLS v1.2 send signature algorithm and signature using agreed | |
3136 | * digest and cached handshake records. | |
3137 | */ | |
3138 | if (SSL_USE_SIGALGS(s)) { | |
3139 | long hdatalen = 0; | |
3140 | void *hdata; | |
3141 | const EVP_MD *md = s->cert->key->digest; | |
3142 | hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); | |
3143 | if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) { | |
3144 | SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); | |
3145 | goto err; | |
3146 | } | |
3147 | p += 2; | |
855a54a9 | 3148 | #ifdef SSL_DEBUG |
0f113f3e MC |
3149 | fprintf(stderr, "Using TLS 1.2 with client alg %s\n", |
3150 | EVP_MD_name(md)); | |
3151 | #endif | |
3152 | if (!EVP_SignInit_ex(&mctx, md, NULL) | |
3153 | || !EVP_SignUpdate(&mctx, hdata, hdatalen) | |
3154 | || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) { | |
3155 | SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_EVP_LIB); | |
3156 | goto err; | |
3157 | } | |
3158 | s2n(u, p); | |
3159 | n = u + 4; | |
0cfb0e75 DSH |
3160 | /* |
3161 | * For extended master secret we've already digested cached | |
3162 | * records. | |
3163 | */ | |
3164 | if (s->session->flags & SSL_SESS_FLAG_EXTMS) { | |
3165 | BIO_free(s->s3->handshake_buffer); | |
3166 | s->s3->handshake_buffer = NULL; | |
3167 | s->s3->flags &= ~TLS1_FLAGS_KEEP_HANDSHAKE; | |
3168 | } else if (!ssl3_digest_cached_records(s)) | |
0f113f3e MC |
3169 | goto err; |
3170 | } else | |
bc36ee62 | 3171 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
3172 | if (pkey->type == EVP_PKEY_RSA) { |
3173 | s->method->ssl3_enc->cert_verify_mac(s, NID_md5, &(data[0])); | |
3174 | if (RSA_sign(NID_md5_sha1, data, | |
3175 | MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH, | |
3176 | &(p[2]), &u, pkey->pkey.rsa) <= 0) { | |
3177 | SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_RSA_LIB); | |
3178 | goto err; | |
3179 | } | |
3180 | s2n(u, p); | |
3181 | n = u + 2; | |
3182 | } else | |
d02b48c6 | 3183 | #endif |
bc36ee62 | 3184 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3185 | if (pkey->type == EVP_PKEY_DSA) { |
3186 | if (!DSA_sign(pkey->save_type, | |
3187 | &(data[MD5_DIGEST_LENGTH]), | |
3188 | SHA_DIGEST_LENGTH, &(p[2]), | |
3189 | (unsigned int *)&j, pkey->pkey.dsa)) { | |
3190 | SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_DSA_LIB); | |
3191 | goto err; | |
3192 | } | |
3193 | s2n(j, p); | |
3194 | n = j + 2; | |
3195 | } else | |
ea262260 | 3196 | #endif |
10bf4fc2 | 3197 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
3198 | if (pkey->type == EVP_PKEY_EC) { |
3199 | if (!ECDSA_sign(pkey->save_type, | |
3200 | &(data[MD5_DIGEST_LENGTH]), | |
3201 | SHA_DIGEST_LENGTH, &(p[2]), | |
3202 | (unsigned int *)&j, pkey->pkey.ec)) { | |
3203 | SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_ECDSA_LIB); | |
3204 | goto err; | |
3205 | } | |
3206 | s2n(j, p); | |
3207 | n = j + 2; | |
3208 | } else | |
3209 | #endif | |
3210 | if (pkey->type == NID_id_GostR3410_94 | |
3211 | || pkey->type == NID_id_GostR3410_2001) { | |
3212 | unsigned char signbuf[64]; | |
3213 | int i; | |
3214 | size_t sigsize = 64; | |
3215 | s->method->ssl3_enc->cert_verify_mac(s, | |
3216 | NID_id_GostR3411_94, data); | |
3217 | if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { | |
3218 | SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); | |
3219 | goto err; | |
3220 | } | |
3221 | for (i = 63, j = 0; i >= 0; j++, i--) { | |
3222 | p[2 + j] = signbuf[i]; | |
3223 | } | |
3224 | s2n(j, p); | |
3225 | n = j + 2; | |
3226 | } else { | |
3227 | SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); | |
3228 | goto err; | |
3229 | } | |
61986d32 | 3230 | if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) { |
77d514c5 MC |
3231 | SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); |
3232 | goto err; | |
3233 | } | |
0f113f3e MC |
3234 | s->state = SSL3_ST_CW_CERT_VRFY_B; |
3235 | } | |
3236 | EVP_MD_CTX_cleanup(&mctx); | |
3237 | EVP_PKEY_CTX_free(pctx); | |
3238 | return ssl_do_write(s); | |
3239 | err: | |
3240 | EVP_MD_CTX_cleanup(&mctx); | |
3241 | EVP_PKEY_CTX_free(pctx); | |
cc273a93 | 3242 | s->state = SSL_ST_ERR; |
0f113f3e MC |
3243 | return (-1); |
3244 | } | |
3245 | ||
3246 | /* | |
3247 | * Check a certificate can be used for client authentication. Currently check | |
3248 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
3249 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
3250 | */ |
3251 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e MC |
3252 | { |
3253 | unsigned long alg_k; | |
3254 | if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey) | |
3255 | return 0; | |
3256 | /* If no suitable signature algorithm can't use certificate */ | |
3257 | if (SSL_USE_SIGALGS(s) && !s->cert->key->digest) | |
3258 | return 0; | |
3259 | /* | |
3260 | * If strict mode check suitability of chain before using it. This also | |
3261 | * adjusts suite B digest if necessary. | |
3262 | */ | |
3263 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
3264 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
3265 | return 0; | |
3266 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
3267 | /* See if we can use client certificate for fixed DH */ | |
3268 | if (alg_k & (SSL_kDHr | SSL_kDHd)) { | |
3269 | SESS_CERT *scert = s->session->sess_cert; | |
3270 | int i = scert->peer_cert_type; | |
3271 | EVP_PKEY *clkey = NULL, *spkey = NULL; | |
3272 | clkey = s->cert->key->privatekey; | |
3273 | /* If client key not DH assume it can be used */ | |
3274 | if (EVP_PKEY_id(clkey) != EVP_PKEY_DH) | |
3275 | return 1; | |
3276 | if (i >= 0) | |
3277 | spkey = X509_get_pubkey(scert->peer_pkeys[i].x509); | |
3278 | if (spkey) { | |
3279 | /* Compare server and client parameters */ | |
3280 | i = EVP_PKEY_cmp_parameters(clkey, spkey); | |
3281 | EVP_PKEY_free(spkey); | |
3282 | if (i != 1) | |
3283 | return 0; | |
3284 | } | |
3285 | s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; | |
3286 | } | |
3287 | return 1; | |
3288 | } | |
0d609395 | 3289 | |
36d16f8e | 3290 | int ssl3_send_client_certificate(SSL *s) |
0f113f3e MC |
3291 | { |
3292 | X509 *x509 = NULL; | |
3293 | EVP_PKEY *pkey = NULL; | |
3294 | int i; | |
3295 | ||
3296 | if (s->state == SSL3_ST_CW_CERT_A) { | |
3297 | /* Let cert callback update client certificates if required */ | |
3298 | if (s->cert->cert_cb) { | |
3299 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
3300 | if (i < 0) { | |
3301 | s->rwstate = SSL_X509_LOOKUP; | |
3302 | return -1; | |
3303 | } | |
3304 | if (i == 0) { | |
3305 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
cc273a93 | 3306 | s->state = SSL_ST_ERR; |
0f113f3e MC |
3307 | return 0; |
3308 | } | |
3309 | s->rwstate = SSL_NOTHING; | |
3310 | } | |
3311 | if (ssl3_check_client_certificate(s)) | |
3312 | s->state = SSL3_ST_CW_CERT_C; | |
3313 | else | |
3314 | s->state = SSL3_ST_CW_CERT_B; | |
3315 | } | |
3316 | ||
3317 | /* We need to get a client cert */ | |
3318 | if (s->state == SSL3_ST_CW_CERT_B) { | |
3319 | /* | |
3320 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
3321 | * return(-1); We then get retied later | |
3322 | */ | |
3323 | i = 0; | |
3324 | i = ssl_do_client_cert_cb(s, &x509, &pkey); | |
3325 | if (i < 0) { | |
3326 | s->rwstate = SSL_X509_LOOKUP; | |
3327 | return (-1); | |
3328 | } | |
3329 | s->rwstate = SSL_NOTHING; | |
3330 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
3331 | s->state = SSL3_ST_CW_CERT_B; | |
3332 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) | |
3333 | i = 0; | |
3334 | } else if (i == 1) { | |
3335 | i = 0; | |
3336 | SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, | |
3337 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); | |
3338 | } | |
3339 | ||
222561fe | 3340 | X509_free(x509); |
25aaa98a | 3341 | EVP_PKEY_free(pkey); |
0f113f3e MC |
3342 | if (i && !ssl3_check_client_certificate(s)) |
3343 | i = 0; | |
3344 | if (i == 0) { | |
3345 | if (s->version == SSL3_VERSION) { | |
3346 | s->s3->tmp.cert_req = 0; | |
3347 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
3348 | return (1); | |
3349 | } else { | |
3350 | s->s3->tmp.cert_req = 2; | |
dab18ab5 DSH |
3351 | if (s->s3->handshake_buffer && !ssl3_digest_cached_records(s)) { |
3352 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
3353 | s->state = SSL_ST_ERR; | |
3354 | return 0; | |
3355 | } | |
0f113f3e MC |
3356 | } |
3357 | } | |
3358 | ||
3359 | /* Ok, we have a cert */ | |
3360 | s->state = SSL3_ST_CW_CERT_C; | |
3361 | } | |
3362 | ||
3363 | if (s->state == SSL3_ST_CW_CERT_C) { | |
3364 | s->state = SSL3_ST_CW_CERT_D; | |
3365 | if (!ssl3_output_cert_chain(s, | |
3366 | (s->s3->tmp.cert_req == | |
3367 | 2) ? NULL : s->cert->key)) { | |
3368 | SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
3369 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
cc273a93 | 3370 | s->state = SSL_ST_ERR; |
0f113f3e MC |
3371 | return 0; |
3372 | } | |
3373 | } | |
3374 | /* SSL3_ST_CW_CERT_D */ | |
3375 | return ssl_do_write(s); | |
3376 | } | |
3377 | ||
3378 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 3379 | |
36d16f8e | 3380 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e MC |
3381 | { |
3382 | int i, idx; | |
3383 | long alg_k, alg_a; | |
3384 | EVP_PKEY *pkey = NULL; | |
3385 | SESS_CERT *sc; | |
bc36ee62 | 3386 | #ifndef OPENSSL_NO_RSA |
0f113f3e | 3387 | RSA *rsa; |
79df9d62 | 3388 | #endif |
bc36ee62 | 3389 | #ifndef OPENSSL_NO_DH |
0f113f3e | 3390 | DH *dh; |
79df9d62 | 3391 | #endif |
d02b48c6 | 3392 | |
0f113f3e MC |
3393 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
3394 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 3395 | |
0f113f3e MC |
3396 | /* we don't have a certificate */ |
3397 | if ((alg_a & (SSL_aNULL | SSL_aKRB5)) || (alg_k & SSL_kPSK)) | |
3398 | return (1); | |
c1ca9d32 | 3399 | |
0f113f3e MC |
3400 | sc = s->session->sess_cert; |
3401 | if (sc == NULL) { | |
3402 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
3403 | goto err; | |
3404 | } | |
bc36ee62 | 3405 | #ifndef OPENSSL_NO_RSA |
0f113f3e | 3406 | rsa = s->session->sess_cert->peer_rsa_tmp; |
79df9d62 | 3407 | #endif |
bc36ee62 | 3408 | #ifndef OPENSSL_NO_DH |
0f113f3e | 3409 | dh = s->session->sess_cert->peer_dh_tmp; |
79df9d62 | 3410 | #endif |
d02b48c6 | 3411 | |
0f113f3e | 3412 | /* This is the passed certificate */ |
d02b48c6 | 3413 | |
0f113f3e | 3414 | idx = sc->peer_cert_type; |
10bf4fc2 | 3415 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
3416 | if (idx == SSL_PKEY_ECC) { |
3417 | if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, s) == 0) { | |
3418 | /* check failed */ | |
3419 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
3420 | goto f_err; | |
3421 | } else { | |
3422 | return 1; | |
3423 | } | |
3424 | } else if (alg_a & SSL_aECDSA) { | |
3425 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3426 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
3427 | goto f_err; | |
3428 | } else if (alg_k & (SSL_kECDHr | SSL_kECDHe)) { | |
3429 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_ECDH_CERT); | |
3430 | goto f_err; | |
3431 | } | |
3432 | #endif | |
3433 | pkey = X509_get_pubkey(sc->peer_pkeys[idx].x509); | |
3434 | i = X509_certificate_type(sc->peer_pkeys[idx].x509, pkey); | |
3435 | EVP_PKEY_free(pkey); | |
3436 | ||
3437 | /* Check that we have a certificate if we require one */ | |
3438 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
3439 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3440 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
3441 | goto f_err; | |
3442 | } | |
bc36ee62 | 3443 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
3444 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
3445 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3446 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
3447 | goto f_err; | |
3448 | } | |
d02b48c6 | 3449 | #endif |
bc36ee62 | 3450 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
3451 | if ((alg_k & SSL_kRSA) && |
3452 | !(has_bits(i, EVP_PK_RSA | EVP_PKT_ENC) || (rsa != NULL))) { | |
3453 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3454 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
3455 | goto f_err; | |
3456 | } | |
79df9d62 | 3457 | #endif |
bc36ee62 | 3458 | #ifndef OPENSSL_NO_DH |
0f113f3e MC |
3459 | if ((alg_k & SSL_kDHE) && |
3460 | !(has_bits(i, EVP_PK_DH | EVP_PKT_EXCH) || (dh != NULL))) { | |
3461 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_DH_KEY); | |
3462 | goto f_err; | |
3463 | } else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) && | |
3464 | !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) { | |
3465 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3466 | SSL_R_MISSING_DH_RSA_CERT); | |
3467 | goto f_err; | |
3468 | } | |
3469 | # ifndef OPENSSL_NO_DSA | |
3470 | else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) && | |
3471 | !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) { | |
3472 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3473 | SSL_R_MISSING_DH_DSA_CERT); | |
3474 | goto f_err; | |
3475 | } | |
3476 | # endif | |
d02b48c6 RE |
3477 | #endif |
3478 | ||
0f113f3e | 3479 | if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i, EVP_PKT_EXP)) { |
bc36ee62 | 3480 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
3481 | if (alg_k & SSL_kRSA) { |
3482 | if (rsa == NULL | |
3483 | || RSA_size(rsa) * 8 > | |
3484 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { | |
3485 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3486 | SSL_R_MISSING_EXPORT_TMP_RSA_KEY); | |
3487 | goto f_err; | |
3488 | } | |
3489 | } else | |
d02b48c6 | 3490 | #endif |
bc36ee62 | 3491 | #ifndef OPENSSL_NO_DH |
0f113f3e MC |
3492 | if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd)) { |
3493 | if (dh == NULL | |
3494 | || DH_size(dh) * 8 > | |
3495 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { | |
3496 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3497 | SSL_R_MISSING_EXPORT_TMP_DH_KEY); | |
3498 | goto f_err; | |
3499 | } | |
3500 | } else | |
3501 | #endif | |
3502 | { | |
3503 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3504 | SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); | |
3505 | goto f_err; | |
3506 | } | |
3507 | } | |
3508 | return (1); | |
3509 | f_err: | |
3510 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
3511 | err: | |
3512 | return (0); | |
3513 | } | |
3514 | ||
6e3d0153 | 3515 | #ifndef OPENSSL_NO_TLSEXT |
0f113f3e | 3516 | /* |
6e3d0153 EK |
3517 | * Normally, we can tell if the server is resuming the session from |
3518 | * the session ID. EAP-FAST (RFC 4851), however, relies on the next server | |
3519 | * message after the ServerHello to determine if the server is resuming. | |
3520 | * Therefore, we allow EAP-FAST to peek ahead. | |
3521 | * ssl3_check_finished returns 1 if we are resuming from an external | |
3522 | * pre-shared secret, we have a "ticket" and the next server handshake message | |
3523 | * is Finished; and 0 otherwise. It returns -1 upon an error. | |
6434abbf | 3524 | */ |
6e3d0153 EK |
3525 | static int ssl3_check_finished(SSL *s) |
3526 | { | |
3527 | int ok = 0; | |
3528 | ||
3529 | if (s->version < TLS1_VERSION || !s->tls_session_secret_cb || | |
3530 | !s->session->tlsext_tick) | |
3531 | return 0; | |
3532 | ||
3533 | /* Need to permit this temporarily, in case the next message is Finished. */ | |
3534 | s->s3->flags |= SSL3_FLAGS_CCS_OK; | |
3535 | /* | |
3536 | * This function is called when we might get a Certificate message instead, | |
3537 | * so permit appropriate message length. | |
3538 | * We ignore the return value as we're only interested in the message type | |
3539 | * and not its length. | |
3540 | */ | |
3541 | s->method->ssl_get_message(s, | |
3542 | SSL3_ST_CR_CERT_A, | |
3543 | SSL3_ST_CR_CERT_B, | |
3544 | -1, s->max_cert_list, &ok); | |
3545 | s->s3->flags &= ~SSL3_FLAGS_CCS_OK; | |
3546 | ||
3547 | if (!ok) | |
3548 | return -1; | |
3549 | ||
3550 | s->s3->tmp.reuse_message = 1; | |
3551 | ||
3552 | if (s->s3->tmp.message_type == SSL3_MT_FINISHED) | |
3553 | return 1; | |
3554 | ||
3555 | /* If we're not done, then the CCS arrived early and we should bail. */ | |
3556 | if (s->s3->change_cipher_spec) { | |
3557 | SSLerr(SSL_F_SSL3_CHECK_FINISHED, SSL_R_CCS_RECEIVED_EARLY); | |
3558 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); | |
3559 | return -1; | |
3560 | } | |
3561 | ||
3562 | return 0; | |
3563 | } | |
6434abbf | 3564 | |
bf48836c | 3565 | # ifndef OPENSSL_NO_NEXTPROTONEG |
ee2ffc27 | 3566 | int ssl3_send_next_proto(SSL *s) |
0f113f3e MC |
3567 | { |
3568 | unsigned int len, padding_len; | |
3569 | unsigned char *d; | |
3570 | ||
3571 | if (s->state == SSL3_ST_CW_NEXT_PROTO_A) { | |
3572 | len = s->next_proto_negotiated_len; | |
3573 | padding_len = 32 - ((len + 2) % 32); | |
3574 | d = (unsigned char *)s->init_buf->data; | |
3575 | d[4] = len; | |
3576 | memcpy(d + 5, s->next_proto_negotiated, len); | |
3577 | d[5 + len] = padding_len; | |
3578 | memset(d + 6 + len, 0, padding_len); | |
3579 | *(d++) = SSL3_MT_NEXT_PROTO; | |
3580 | l2n3(2 + len + padding_len, d); | |
3581 | s->state = SSL3_ST_CW_NEXT_PROTO_B; | |
3582 | s->init_num = 4 + 2 + len + padding_len; | |
3583 | s->init_off = 0; | |
3584 | } | |
3585 | ||
3586 | return ssl3_do_write(s, SSL3_RT_HANDSHAKE); | |
3587 | } | |
ee2ffc27 | 3588 | # endif |
6434abbf | 3589 | #endif |
368888bc DSH |
3590 | |
3591 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) | |
0f113f3e MC |
3592 | { |
3593 | int i = 0; | |
368888bc | 3594 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3595 | if (s->ctx->client_cert_engine) { |
3596 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3597 | SSL_get_client_CA_list(s), | |
3598 | px509, ppkey, NULL, NULL, NULL); | |
3599 | if (i != 0) | |
3600 | return i; | |
3601 | } | |
3602 | #endif | |
3603 | if (s->ctx->client_cert_cb) | |
3604 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3605 | return i; | |
3606 | } |