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d02b48c6 | 1 | /* ssl/s3_clnt.c */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
3 | * All rights reserved. |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
0f113f3e | 8 | * |
d02b48c6 RE |
9 | * This library is free for commercial and non-commercial use as long as |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
0f113f3e | 15 | * |
d02b48c6 RE |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
0f113f3e | 22 | * |
d02b48c6 RE |
23 | * Redistribution and use in source and binary forms, with or without |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
d02b48c6 RE |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
d02b48c6 RE |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
0f113f3e | 52 | * |
d02b48c6 RE |
53 | * The licence and distribution terms for any publically available version or |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
8c74b5e5 | 58 | /* ==================================================================== |
52b8dad8 | 59 | * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. |
8c74b5e5 BM |
60 | * |
61 | * Redistribution and use in source and binary forms, with or without | |
62 | * modification, are permitted provided that the following conditions | |
63 | * are met: | |
64 | * | |
65 | * 1. Redistributions of source code must retain the above copyright | |
0f113f3e | 66 | * notice, this list of conditions and the following disclaimer. |
8c74b5e5 BM |
67 | * |
68 | * 2. Redistributions in binary form must reproduce the above copyright | |
69 | * notice, this list of conditions and the following disclaimer in | |
70 | * the documentation and/or other materials provided with the | |
71 | * distribution. | |
72 | * | |
73 | * 3. All advertising materials mentioning features or use of this | |
74 | * software must display the following acknowledgment: | |
75 | * "This product includes software developed by the OpenSSL Project | |
76 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
77 | * | |
78 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
79 | * endorse or promote products derived from this software without | |
80 | * prior written permission. For written permission, please contact | |
81 | * openssl-core@openssl.org. | |
82 | * | |
83 | * 5. Products derived from this software may not be called "OpenSSL" | |
84 | * nor may "OpenSSL" appear in their names without prior written | |
85 | * permission of the OpenSSL Project. | |
86 | * | |
87 | * 6. Redistributions of any form whatsoever must retain the following | |
88 | * acknowledgment: | |
89 | * "This product includes software developed by the OpenSSL Project | |
90 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
91 | * | |
92 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
93 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
94 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
95 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
96 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
97 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
98 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
99 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
100 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
101 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
102 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
103 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
104 | * ==================================================================== | |
105 | * | |
106 | * This product includes cryptographic software written by Eric Young | |
107 | * (eay@cryptsoft.com). This product includes software written by Tim | |
108 | * Hudson (tjh@cryptsoft.com). | |
109 | * | |
110 | */ | |
ea262260 BM |
111 | /* ==================================================================== |
112 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. | |
113 | * | |
0f113f3e | 114 | * Portions of the attached software ("Contribution") are developed by |
ea262260 BM |
115 | * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. |
116 | * | |
117 | * The Contribution is licensed pursuant to the OpenSSL open source | |
118 | * license provided above. | |
119 | * | |
ea262260 BM |
120 | * ECC cipher suite support in OpenSSL originally written by |
121 | * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. | |
122 | * | |
123 | */ | |
ddac1974 NL |
124 | /* ==================================================================== |
125 | * Copyright 2005 Nokia. All rights reserved. | |
126 | * | |
127 | * The portions of the attached software ("Contribution") is developed by | |
128 | * Nokia Corporation and is licensed pursuant to the OpenSSL open source | |
129 | * license. | |
130 | * | |
131 | * The Contribution, originally written by Mika Kousa and Pasi Eronen of | |
132 | * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites | |
133 | * support (see RFC 4279) to OpenSSL. | |
134 | * | |
135 | * No patent licenses or other rights except those expressly stated in | |
136 | * the OpenSSL open source license shall be deemed granted or received | |
137 | * expressly, by implication, estoppel, or otherwise. | |
138 | * | |
139 | * No assurances are provided by Nokia that the Contribution does not | |
140 | * infringe the patent or other intellectual property rights of any third | |
141 | * party or that the license provides you with all the necessary rights | |
142 | * to make use of the Contribution. | |
143 | * | |
144 | * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN | |
145 | * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA | |
146 | * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY | |
147 | * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR | |
148 | * OTHERWISE. | |
149 | */ | |
d02b48c6 RE |
150 | |
151 | #include <stdio.h> | |
7b63c0fa | 152 | #include "ssl_locl.h" |
ec577822 BM |
153 | #include <openssl/buffer.h> |
154 | #include <openssl/rand.h> | |
155 | #include <openssl/objects.h> | |
156 | #include <openssl/evp.h> | |
dbad1690 | 157 | #include <openssl/md5.h> |
3eeaab4b | 158 | #ifndef OPENSSL_NO_DH |
0f113f3e | 159 | # include <openssl/dh.h> |
3eeaab4b | 160 | #endif |
d095b68d | 161 | #include <openssl/bn.h> |
368888bc | 162 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e | 163 | # include <openssl/engine.h> |
368888bc | 164 | #endif |
f9b3bff6 | 165 | |
d45ba43d | 166 | static int ssl_set_version(SSL *s); |
0f113f3e | 167 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b); |
d45ba43d | 168 | static int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, |
e9fa092e | 169 | unsigned char *p); |
ea262260 | 170 | |
d45ba43d MC |
171 | /* |
172 | * Work out what version we should be using for the initial ClientHello if | |
173 | * the version is currently set to (D)TLS_ANY_VERSION. | |
174 | * Returns 1 on success | |
175 | * Returns 0 on error | |
176 | */ | |
177 | static int ssl_set_version(SSL *s) | |
178 | { | |
179 | unsigned long mask, options = s->options; | |
180 | ||
181 | if (s->method->version == TLS_ANY_VERSION) { | |
182 | /* | |
183 | * SSL_OP_NO_X disables all protocols above X *if* there are | |
184 | * some protocols below X enabled. This is required in order | |
185 | * to maintain "version capability" vector contiguous. So | |
186 | * that if application wants to disable TLS1.0 in favour of | |
187 | * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the | |
188 | * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3. | |
189 | */ | |
190 | mask = SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1 | |
191 | #if !defined(OPENSSL_NO_SSL3) | |
192 | | SSL_OP_NO_SSLv3 | |
193 | #endif | |
194 | ; | |
195 | #if !defined(OPENSSL_NO_TLS1_2_CLIENT) | |
196 | if (options & SSL_OP_NO_TLSv1_2) { | |
197 | if ((options & mask) != mask) { | |
198 | s->version = TLS1_1_VERSION; | |
199 | } else { | |
200 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE); | |
201 | return 0; | |
202 | } | |
203 | } else { | |
204 | s->version = TLS1_2_VERSION; | |
205 | } | |
206 | #else | |
207 | if ((options & mask) == mask) { | |
208 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_NO_PROTOCOLS_AVAILABLE); | |
209 | return 0; | |
210 | } | |
211 | s->version = TLS1_1_VERSION; | |
212 | #endif | |
213 | ||
214 | mask &= ~SSL_OP_NO_TLSv1_1; | |
215 | if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask) | |
216 | s->version = TLS1_VERSION; | |
217 | mask &= ~SSL_OP_NO_TLSv1; | |
218 | #if !defined(OPENSSL_NO_SSL3) | |
219 | if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask) | |
220 | s->version = SSL3_VERSION; | |
221 | #endif | |
222 | ||
223 | if (s->version != TLS1_2_VERSION && tls1_suiteb(s)) { | |
224 | SSLerr(SSL_F_SSL_SET_VERSION, | |
225 | SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE); | |
226 | return 0; | |
227 | } | |
228 | ||
229 | if (s->version == SSL3_VERSION && FIPS_mode()) { | |
230 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); | |
231 | return 0; | |
232 | } | |
233 | ||
234 | } else if (s->method->version == DTLS_ANY_VERSION) { | |
235 | /* Determine which DTLS version to use */ | |
236 | /* If DTLS 1.2 disabled correct the version number */ | |
237 | if (options & SSL_OP_NO_DTLSv1_2) { | |
238 | if (tls1_suiteb(s)) { | |
239 | SSLerr(SSL_F_SSL_SET_VERSION, | |
240 | SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE); | |
241 | return 0; | |
242 | } | |
243 | /* | |
244 | * Disabling all versions is silly: return an error. | |
245 | */ | |
246 | if (options & SSL_OP_NO_DTLSv1) { | |
247 | SSLerr(SSL_F_SSL_SET_VERSION, SSL_R_WRONG_SSL_VERSION); | |
248 | return 0; | |
249 | } | |
250 | /* | |
251 | * Update method so we don't use any DTLS 1.2 features. | |
252 | */ | |
253 | s->method = DTLSv1_client_method(); | |
254 | s->version = DTLS1_VERSION; | |
255 | } else { | |
256 | /* | |
257 | * We only support one version: update method | |
258 | */ | |
259 | if (options & SSL_OP_NO_DTLSv1) | |
260 | s->method = DTLSv1_2_client_method(); | |
261 | s->version = DTLS1_2_VERSION; | |
262 | } | |
263 | } | |
264 | ||
265 | s->client_version = s->version; | |
266 | ||
267 | return 1; | |
268 | } | |
269 | ||
36d16f8e | 270 | int ssl3_client_hello(SSL *s) |
b9908bf9 MC |
271 | { |
272 | if (s->state == SSL3_ST_CW_CLNT_HELLO_A) { | |
273 | if(tls_construct_client_hello(s) == 0) | |
274 | goto err; | |
275 | ||
276 | s->state = SSL3_ST_CW_CLNT_HELLO_B; | |
277 | } | |
278 | ||
279 | /* SSL3_ST_CW_CLNT_HELLO_B */ | |
280 | return ssl_do_write(s); | |
281 | err: | |
282 | s->state = SSL_ST_ERR; | |
283 | return -1; | |
284 | ||
285 | } | |
286 | ||
287 | int tls_construct_client_hello(SSL *s) | |
0f113f3e MC |
288 | { |
289 | unsigned char *buf; | |
290 | unsigned char *p, *d; | |
291 | int i; | |
292 | unsigned long l; | |
293 | int al = 0; | |
09b6c2ef | 294 | #ifndef OPENSSL_NO_COMP |
0f113f3e MC |
295 | int j; |
296 | SSL_COMP *comp; | |
297 | #endif | |
b9908bf9 | 298 | SSL_SESSION *sess = s->session; |
0f113f3e MC |
299 | |
300 | buf = (unsigned char *)s->init_buf->data; | |
0f113f3e | 301 | |
b9908bf9 MC |
302 | /* Work out what SSL/TLS/DTLS version to use */ |
303 | if (ssl_set_version(s) == 0) | |
304 | goto err; | |
0f113f3e | 305 | |
b9908bf9 | 306 | if ((sess == NULL) || (sess->ssl_version != s->version) || |
0f113f3e | 307 | /* |
b9908bf9 MC |
308 | * In the case of EAP-FAST, we can have a pre-shared |
309 | * "ticket" without a session ID. | |
0f113f3e | 310 | */ |
b9908bf9 MC |
311 | (!sess->session_id_length && !sess->tlsext_tick) || |
312 | (sess->not_resumable)) { | |
313 | if (!ssl_get_new_session(s, 0)) | |
e1b568dd | 314 | goto err; |
b9908bf9 MC |
315 | } |
316 | /* else use the pre-loaded session */ | |
0f113f3e | 317 | |
b9908bf9 | 318 | p = s->s3->client_random; |
0f113f3e | 319 | |
b9908bf9 MC |
320 | /* |
321 | * for DTLS if client_random is initialized, reuse it, we are | |
322 | * required to use same upon reply to HelloVerify | |
323 | */ | |
324 | if (SSL_IS_DTLS(s)) { | |
325 | size_t idx; | |
326 | i = 1; | |
327 | for (idx = 0; idx < sizeof(s->s3->client_random); idx++) { | |
328 | if (p[idx]) { | |
329 | i = 0; | |
330 | break; | |
0f113f3e | 331 | } |
0f113f3e | 332 | } |
b9908bf9 MC |
333 | } else |
334 | i = 1; | |
0f113f3e | 335 | |
b9908bf9 MC |
336 | if (i && ssl_fill_hello_random(s, 0, p, |
337 | sizeof(s->s3->client_random)) <= 0) | |
338 | goto err; | |
339 | ||
340 | /* Do the message type and length last */ | |
341 | d = p = ssl_handshake_start(s); | |
342 | ||
343 | /*- | |
344 | * version indicates the negotiated version: for example from | |
345 | * an SSLv2/v3 compatible client hello). The client_version | |
346 | * field is the maximum version we permit and it is also | |
347 | * used in RSA encrypted premaster secrets. Some servers can | |
348 | * choke if we initially report a higher version then | |
349 | * renegotiate to a lower one in the premaster secret. This | |
350 | * didn't happen with TLS 1.0 as most servers supported it | |
351 | * but it can with TLS 1.1 or later if the server only supports | |
352 | * 1.0. | |
353 | * | |
354 | * Possible scenario with previous logic: | |
355 | * 1. Client hello indicates TLS 1.2 | |
356 | * 2. Server hello says TLS 1.0 | |
357 | * 3. RSA encrypted premaster secret uses 1.2. | |
358 | * 4. Handhaked proceeds using TLS 1.0. | |
359 | * 5. Server sends hello request to renegotiate. | |
360 | * 6. Client hello indicates TLS v1.0 as we now | |
361 | * know that is maximum server supports. | |
362 | * 7. Server chokes on RSA encrypted premaster secret | |
363 | * containing version 1.0. | |
364 | * | |
365 | * For interoperability it should be OK to always use the | |
366 | * maximum version we support in client hello and then rely | |
367 | * on the checking of version to ensure the servers isn't | |
368 | * being inconsistent: for example initially negotiating with | |
369 | * TLS 1.0 and renegotiating with TLS 1.2. We do this by using | |
370 | * client_version in client hello and not resetting it to | |
371 | * the negotiated version. | |
372 | */ | |
373 | *(p++) = s->client_version >> 8; | |
374 | *(p++) = s->client_version & 0xff; | |
375 | ||
376 | /* Random stuff */ | |
377 | memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE); | |
378 | p += SSL3_RANDOM_SIZE; | |
379 | ||
380 | /* Session ID */ | |
381 | if (s->new_session) | |
382 | i = 0; | |
383 | else | |
384 | i = s->session->session_id_length; | |
385 | *(p++) = i; | |
386 | if (i != 0) { | |
387 | if (i > (int)sizeof(s->session->session_id)) { | |
388 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
389 | goto err; | |
0f113f3e | 390 | } |
b9908bf9 MC |
391 | memcpy(p, s->session->session_id, i); |
392 | p += i; | |
393 | } | |
0f113f3e | 394 | |
b9908bf9 MC |
395 | /* cookie stuff for DTLS */ |
396 | if (SSL_IS_DTLS(s)) { | |
397 | if (s->d1->cookie_len > sizeof(s->d1->cookie)) { | |
398 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
399 | goto err; |
400 | } | |
b9908bf9 MC |
401 | *(p++) = s->d1->cookie_len; |
402 | memcpy(p, s->d1->cookie, s->d1->cookie_len); | |
403 | p += s->d1->cookie_len; | |
404 | } | |
405 | ||
406 | /* Ciphers supported */ | |
407 | i = ssl_cipher_list_to_bytes(s, SSL_get_ciphers(s), &(p[2])); | |
408 | if (i == 0) { | |
409 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_NO_CIPHERS_AVAILABLE); | |
410 | goto err; | |
411 | } | |
800e1cd9 | 412 | #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH |
b9908bf9 MC |
413 | /* |
414 | * Some servers hang if client hello > 256 bytes as hack workaround | |
415 | * chop number of supported ciphers to keep it well below this if we | |
416 | * use TLS v1.2 | |
417 | */ | |
418 | if (TLS1_get_version(s) >= TLS1_2_VERSION | |
419 | && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) | |
420 | i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; | |
0f113f3e | 421 | #endif |
b9908bf9 MC |
422 | s2n(i, p); |
423 | p += i; | |
0f113f3e | 424 | |
b9908bf9 | 425 | /* COMPRESSION */ |
09b6c2ef | 426 | #ifdef OPENSSL_NO_COMP |
b9908bf9 | 427 | *(p++) = 1; |
09b6c2ef | 428 | #else |
566dda07 | 429 | |
b9908bf9 MC |
430 | if (!ssl_allow_compression(s) || !s->ctx->comp_methods) |
431 | j = 0; | |
432 | else | |
433 | j = sk_SSL_COMP_num(s->ctx->comp_methods); | |
434 | *(p++) = 1 + j; | |
435 | for (i = 0; i < j; i++) { | |
436 | comp = sk_SSL_COMP_value(s->ctx->comp_methods, i); | |
437 | *(p++) = comp->id; | |
438 | } | |
09b6c2ef | 439 | #endif |
b9908bf9 | 440 | *(p++) = 0; /* Add the NULL method */ |
761772d7 | 441 | |
b9908bf9 MC |
442 | /* TLS extensions */ |
443 | if (ssl_prepare_clienthello_tlsext(s) <= 0) { | |
444 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); | |
445 | goto err; | |
446 | } | |
447 | if ((p = | |
448 | ssl_add_clienthello_tlsext(s, p, buf + SSL3_RT_MAX_PLAIN_LENGTH, | |
449 | &al)) == NULL) { | |
450 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
451 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
452 | goto err; | |
453 | } | |
0f113f3e | 454 | |
b9908bf9 MC |
455 | l = p - d; |
456 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_HELLO, l)) { | |
457 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
458 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); | |
459 | goto err; | |
0f113f3e MC |
460 | } |
461 | ||
b9908bf9 | 462 | return 1; |
0f113f3e | 463 | err: |
b9908bf9 MC |
464 | statem_set_error(s); |
465 | return 0; | |
0f113f3e | 466 | } |
d02b48c6 | 467 | |
36d16f8e | 468 | int ssl3_get_server_hello(SSL *s) |
0f113f3e | 469 | { |
b9908bf9 | 470 | int ok, al; |
0f113f3e | 471 | long n; |
0f113f3e MC |
472 | /* |
473 | * Hello verify request and/or server hello version may not match so set | |
474 | * first packet if we're negotiating version. | |
475 | */ | |
81fc390f | 476 | s->first_packet = 1; |
0f113f3e MC |
477 | |
478 | n = s->method->ssl_get_message(s, | |
479 | SSL3_ST_CR_SRVR_HELLO_A, | |
480 | SSL3_ST_CR_SRVR_HELLO_B, -1, 20000, &ok); | |
481 | ||
482 | if (!ok) | |
483 | return ((int)n); | |
484 | ||
81fc390f | 485 | s->first_packet = 0; |
0f113f3e | 486 | if (SSL_IS_DTLS(s)) { |
0f113f3e MC |
487 | if (s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) { |
488 | if (s->d1->send_cookie == 0) { | |
489 | s->s3->tmp.reuse_message = 1; | |
490 | return 1; | |
491 | } else { /* already sent a cookie */ | |
492 | ||
493 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
494 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE); | |
495 | goto f_err; | |
496 | } | |
497 | } | |
498 | } | |
499 | ||
500 | if (s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) { | |
501 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
502 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_BAD_MESSAGE_TYPE); | |
503 | goto f_err; | |
504 | } | |
505 | ||
b9908bf9 MC |
506 | return tls_process_server_hello(s, (unsigned long)n); |
507 | f_err: | |
508 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
509 | s->state = SSL_ST_ERR; | |
510 | return (-1); | |
511 | } | |
512 | ||
513 | enum MSG_PROCESS_RETURN tls_process_server_hello(SSL *s, unsigned long n) | |
514 | { | |
515 | STACK_OF(SSL_CIPHER) *sk; | |
516 | const SSL_CIPHER *c; | |
517 | PACKET pkt, session_id; | |
518 | size_t session_id_len; | |
519 | unsigned char *cipherchars; | |
520 | int i, al = SSL_AD_INTERNAL_ERROR; | |
521 | unsigned int compression; | |
522 | #ifndef OPENSSL_NO_COMP | |
523 | SSL_COMP *comp; | |
524 | #endif | |
525 | ||
50932c4a MC |
526 | if (!PACKET_buf_init(&pkt, s->init_msg, n)) { |
527 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 528 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); |
50932c4a MC |
529 | goto f_err; |
530 | } | |
13c9bb3e MC |
531 | |
532 | if (s->method->version == TLS_ANY_VERSION) { | |
50932c4a MC |
533 | unsigned int sversion; |
534 | ||
535 | if (!PACKET_get_net_2(&pkt, &sversion)) { | |
536 | al = SSL_AD_DECODE_ERROR; | |
b9908bf9 | 537 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
538 | goto f_err; |
539 | } | |
13c9bb3e MC |
540 | |
541 | #if TLS_MAX_VERSION != TLS1_2_VERSION | |
542 | #error Code needs updating for new TLS version | |
543 | #endif | |
544 | #ifndef OPENSSL_NO_SSL3 | |
545 | if ((sversion == SSL3_VERSION) && !(s->options & SSL_OP_NO_SSLv3)) { | |
546 | if (FIPS_mode()) { | |
b9908bf9 | 547 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
13c9bb3e | 548 | SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE); |
d45ba43d MC |
549 | al = SSL_AD_PROTOCOL_VERSION; |
550 | goto f_err; | |
13c9bb3e MC |
551 | } |
552 | s->method = SSLv3_client_method(); | |
553 | } else | |
554 | #endif | |
555 | if ((sversion == TLS1_VERSION) && !(s->options & SSL_OP_NO_TLSv1)) { | |
556 | s->method = TLSv1_client_method(); | |
557 | } else if ((sversion == TLS1_1_VERSION) && | |
558 | !(s->options & SSL_OP_NO_TLSv1_1)) { | |
559 | s->method = TLSv1_1_client_method(); | |
560 | } else if ((sversion == TLS1_2_VERSION) && | |
561 | !(s->options & SSL_OP_NO_TLSv1_2)) { | |
562 | s->method = TLSv1_2_client_method(); | |
563 | } else { | |
b9908bf9 | 564 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNSUPPORTED_PROTOCOL); |
d45ba43d MC |
565 | al = SSL_AD_PROTOCOL_VERSION; |
566 | goto f_err; | |
13c9bb3e MC |
567 | } |
568 | s->session->ssl_version = s->version = s->method->version; | |
569 | ||
570 | if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL)) { | |
b9908bf9 | 571 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_VERSION_TOO_LOW); |
d45ba43d MC |
572 | al = SSL_AD_PROTOCOL_VERSION; |
573 | goto f_err; | |
13c9bb3e MC |
574 | } |
575 | } else if (s->method->version == DTLS_ANY_VERSION) { | |
0f113f3e | 576 | /* Work out correct protocol version to use */ |
50932c4a MC |
577 | unsigned int hversion; |
578 | int options; | |
579 | ||
580 | if (!PACKET_get_net_2(&pkt, &hversion)) { | |
581 | al = SSL_AD_DECODE_ERROR; | |
b9908bf9 | 582 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
583 | goto f_err; |
584 | } | |
585 | ||
586 | options = s->options; | |
0f113f3e MC |
587 | if (hversion == DTLS1_2_VERSION && !(options & SSL_OP_NO_DTLSv1_2)) |
588 | s->method = DTLSv1_2_client_method(); | |
589 | else if (tls1_suiteb(s)) { | |
b9908bf9 | 590 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
591 | SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE); |
592 | s->version = hversion; | |
593 | al = SSL_AD_PROTOCOL_VERSION; | |
594 | goto f_err; | |
595 | } else if (hversion == DTLS1_VERSION && !(options & SSL_OP_NO_DTLSv1)) | |
596 | s->method = DTLSv1_client_method(); | |
597 | else { | |
b9908bf9 | 598 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); |
0f113f3e MC |
599 | s->version = hversion; |
600 | al = SSL_AD_PROTOCOL_VERSION; | |
601 | goto f_err; | |
602 | } | |
7322abf5 | 603 | s->session->ssl_version = s->version = s->method->version; |
50932c4a MC |
604 | } else { |
605 | unsigned char *vers; | |
606 | ||
607 | if (!PACKET_get_bytes(&pkt, &vers, 2)) { | |
608 | al = SSL_AD_DECODE_ERROR; | |
b9908bf9 | 609 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
610 | goto f_err; |
611 | } | |
612 | if ((vers[0] != (s->version >> 8)) | |
613 | || (vers[1] != (s->version & 0xff))) { | |
b9908bf9 | 614 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_SSL_VERSION); |
50932c4a MC |
615 | s->version = (s->version & 0xff00) | vers[1]; |
616 | al = SSL_AD_PROTOCOL_VERSION; | |
617 | goto f_err; | |
618 | } | |
0f113f3e | 619 | } |
0f113f3e MC |
620 | |
621 | /* load the server hello data */ | |
622 | /* load the server random */ | |
50932c4a MC |
623 | if (!PACKET_copy_bytes(&pkt, s->s3->server_random, SSL3_RANDOM_SIZE)) { |
624 | al = SSL_AD_DECODE_ERROR; | |
b9908bf9 | 625 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
50932c4a MC |
626 | goto f_err; |
627 | } | |
0f113f3e MC |
628 | |
629 | s->hit = 0; | |
630 | ||
fc5ce51d EK |
631 | /* Get the session-id. */ |
632 | if (!PACKET_get_length_prefixed_1(&pkt, &session_id)) { | |
633 | al = SSL_AD_DECODE_ERROR; | |
634 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
635 | goto f_err; | |
636 | } | |
637 | session_id_len = PACKET_remaining(&session_id); | |
638 | if (session_id_len > sizeof s->session->session_id | |
639 | || session_id_len > SSL3_SESSION_ID_SIZE) { | |
0f113f3e | 640 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 641 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_SSL3_SESSION_ID_TOO_LONG); |
0f113f3e MC |
642 | goto f_err; |
643 | } | |
e481f9b9 | 644 | |
fc5ce51d EK |
645 | if (!PACKET_get_bytes(&pkt, &cipherchars, TLS_CIPHER_LEN)) { |
646 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); | |
647 | al = SSL_AD_DECODE_ERROR; | |
648 | goto f_err; | |
649 | } | |
650 | ||
0f113f3e | 651 | /* |
6e3d0153 EK |
652 | * Check if we can resume the session based on external pre-shared secret. |
653 | * EAP-FAST (RFC 4851) supports two types of session resumption. | |
654 | * Resumption based on server-side state works with session IDs. | |
655 | * Resumption based on pre-shared Protected Access Credentials (PACs) | |
656 | * works by overriding the SessionTicket extension at the application | |
657 | * layer, and does not send a session ID. (We do not know whether EAP-FAST | |
658 | * servers would honour the session ID.) Therefore, the session ID alone | |
659 | * is not a reliable indicator of session resumption, so we first check if | |
660 | * we can resume, and later peek at the next handshake message to see if the | |
661 | * server wants to resume. | |
0f113f3e | 662 | */ |
6e3d0153 EK |
663 | if (s->version >= TLS1_VERSION && s->tls_session_secret_cb && |
664 | s->session->tlsext_tick) { | |
0f113f3e MC |
665 | SSL_CIPHER *pref_cipher = NULL; |
666 | s->session->master_key_length = sizeof(s->session->master_key); | |
667 | if (s->tls_session_secret_cb(s, s->session->master_key, | |
668 | &s->session->master_key_length, | |
669 | NULL, &pref_cipher, | |
670 | s->tls_session_secret_cb_arg)) { | |
671 | s->session->cipher = pref_cipher ? | |
50932c4a | 672 | pref_cipher : ssl_get_cipher_by_char(s, cipherchars); |
6e3d0153 | 673 | } else { |
b9908bf9 | 674 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, ERR_R_INTERNAL_ERROR); |
6e3d0153 EK |
675 | al = SSL_AD_INTERNAL_ERROR; |
676 | goto f_err; | |
0f113f3e | 677 | } |
50932c4a MC |
678 | } |
679 | ||
fc5ce51d EK |
680 | if (session_id_len != 0 && session_id_len == s->session->session_id_length |
681 | && memcmp(PACKET_data(&session_id), s->session->session_id, | |
682 | session_id_len) == 0) { | |
0f113f3e MC |
683 | if (s->sid_ctx_length != s->session->sid_ctx_length |
684 | || memcmp(s->session->sid_ctx, s->sid_ctx, s->sid_ctx_length)) { | |
685 | /* actually a client application bug */ | |
686 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 687 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
688 | SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); |
689 | goto f_err; | |
690 | } | |
691 | s->hit = 1; | |
6e3d0153 | 692 | } else { |
0f113f3e | 693 | /* |
6e3d0153 EK |
694 | * If we were trying for session-id reuse but the server |
695 | * didn't echo the ID, make a new SSL_SESSION. | |
696 | * In the case of EAP-FAST and PAC, we do not send a session ID, | |
697 | * so the PAC-based session secret is always preserved. It'll be | |
698 | * overwritten if the server refuses resumption. | |
0f113f3e MC |
699 | */ |
700 | if (s->session->session_id_length > 0) { | |
701 | if (!ssl_get_new_session(s, 0)) { | |
702 | goto f_err; | |
703 | } | |
704 | } | |
50932c4a | 705 | |
fc5ce51d EK |
706 | s->session->session_id_length = session_id_len; |
707 | /* session_id_len could be 0 */ | |
708 | memcpy(s->session->session_id, PACKET_data(&session_id), | |
709 | session_id_len); | |
0f113f3e | 710 | } |
fc5ce51d | 711 | |
50932c4a | 712 | c = ssl_get_cipher_by_char(s, cipherchars); |
0f113f3e MC |
713 | if (c == NULL) { |
714 | /* unknown cipher */ | |
715 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 716 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_UNKNOWN_CIPHER_RETURNED); |
0f113f3e MC |
717 | goto f_err; |
718 | } | |
719 | /* Set version disabled mask now we know version */ | |
720 | if (!SSL_USE_TLS1_2_CIPHERS(s)) | |
4d69f9e6 | 721 | s->s3->tmp.mask_ssl = SSL_TLSV1_2; |
0f113f3e | 722 | else |
4d69f9e6 | 723 | s->s3->tmp.mask_ssl = 0; |
0f113f3e MC |
724 | /* |
725 | * If it is a disabled cipher we didn't send it in client hello, so | |
726 | * return an error. | |
727 | */ | |
728 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_CHECK)) { | |
729 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 730 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
731 | goto f_err; |
732 | } | |
0f113f3e MC |
733 | |
734 | sk = ssl_get_ciphers_by_id(s); | |
735 | i = sk_SSL_CIPHER_find(sk, c); | |
736 | if (i < 0) { | |
737 | /* we did not say we would use this cipher */ | |
738 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 739 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_WRONG_CIPHER_RETURNED); |
0f113f3e MC |
740 | goto f_err; |
741 | } | |
742 | ||
743 | /* | |
744 | * Depending on the session caching (internal/external), the cipher | |
745 | * and/or cipher_id values may not be set. Make sure that cipher_id is | |
746 | * set and use it for comparison. | |
747 | */ | |
748 | if (s->session->cipher) | |
749 | s->session->cipher_id = s->session->cipher->id; | |
750 | if (s->hit && (s->session->cipher_id != c->id)) { | |
9e9858d1 | 751 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 752 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
9e9858d1 RS |
753 | SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); |
754 | goto f_err; | |
0f113f3e MC |
755 | } |
756 | s->s3->tmp.new_cipher = c; | |
757 | /* | |
758 | * Don't digest cached records if no sigalgs: we may need them for client | |
759 | * authentication. | |
760 | */ | |
124037fd | 761 | if (!SSL_USE_SIGALGS(s) && !ssl3_digest_cached_records(s, 0)) |
0f113f3e MC |
762 | goto f_err; |
763 | /* lets get the compression algorithm */ | |
764 | /* COMPRESSION */ | |
fc5ce51d | 765 | if (!PACKET_get_1(&pkt, &compression)) { |
50932c4a MC |
766 | SSLerr(SSL_F_SSL3_GET_SERVER_HELLO, SSL_R_LENGTH_MISMATCH); |
767 | al = SSL_AD_DECODE_ERROR; | |
768 | goto f_err; | |
769 | } | |
09b6c2ef | 770 | #ifdef OPENSSL_NO_COMP |
fc5ce51d | 771 | if (compression != 0) { |
0f113f3e | 772 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 773 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
774 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
775 | goto f_err; | |
776 | } | |
777 | /* | |
778 | * If compression is disabled we'd better not try to resume a session | |
779 | * using compression. | |
780 | */ | |
781 | if (s->session->compress_meth != 0) { | |
b9908bf9 | 782 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_INCONSISTENT_COMPRESSION); |
0f113f3e MC |
783 | goto f_err; |
784 | } | |
09b6c2ef | 785 | #else |
fc5ce51d | 786 | if (s->hit && compression != s->session->compress_meth) { |
0f113f3e | 787 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 788 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
789 | SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); |
790 | goto f_err; | |
791 | } | |
fc5ce51d | 792 | if (compression == 0) |
0f113f3e MC |
793 | comp = NULL; |
794 | else if (!ssl_allow_compression(s)) { | |
795 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 796 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_COMPRESSION_DISABLED); |
0f113f3e | 797 | goto f_err; |
fc5ce51d EK |
798 | } else { |
799 | comp = ssl3_comp_find(s->ctx->comp_methods, compression); | |
800 | } | |
0f113f3e | 801 | |
fc5ce51d | 802 | if (compression != 0 && comp == NULL) { |
0f113f3e | 803 | al = SSL_AD_ILLEGAL_PARAMETER; |
b9908bf9 | 804 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, |
0f113f3e MC |
805 | SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); |
806 | goto f_err; | |
807 | } else { | |
808 | s->s3->tmp.new_compression = comp; | |
809 | } | |
09b6c2ef | 810 | #endif |
761772d7 | 811 | |
0f113f3e | 812 | /* TLS extensions */ |
50932c4a | 813 | if (!ssl_parse_serverhello_tlsext(s, &pkt)) { |
b9908bf9 | 814 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_PARSE_TLSEXT); |
0f113f3e MC |
815 | goto err; |
816 | } | |
0f113f3e | 817 | |
50932c4a | 818 | if (PACKET_remaining(&pkt) != 0) { |
0f113f3e MC |
819 | /* wrong packet length */ |
820 | al = SSL_AD_DECODE_ERROR; | |
b9908bf9 | 821 | SSLerr(SSL_F_TLS_PROCESS_SERVER_HELLO, SSL_R_BAD_PACKET_LENGTH); |
0f113f3e MC |
822 | goto f_err; |
823 | } | |
824 | ||
8723588e MC |
825 | #ifndef OPENSSL_NO_SCTP |
826 | if (SSL_IS_DTLS(s) && s->hit) { | |
827 | unsigned char sctpauthkey[64]; | |
828 | char labelbuffer[sizeof(DTLS1_SCTP_AUTH_LABEL)]; | |
829 | ||
830 | /* | |
831 | * Add new shared key for SCTP-Auth, will be ignored if | |
832 | * no SCTP used. | |
833 | */ | |
834 | snprintf((char *)labelbuffer, | |
835 | sizeof(DTLS1_SCTP_AUTH_LABEL), | |
836 | DTLS1_SCTP_AUTH_LABEL); | |
837 | ||
838 | if (SSL_export_keying_material(s, sctpauthkey, | |
839 | sizeof(sctpauthkey), | |
840 | labelbuffer, | |
841 | sizeof(labelbuffer), NULL, 0, | |
842 | 0) <= 0) | |
843 | goto err; | |
844 | ||
845 | BIO_ctrl(SSL_get_wbio(s), | |
846 | BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY, | |
847 | sizeof(sctpauthkey), sctpauthkey); | |
848 | } | |
849 | #endif | |
850 | ||
b9908bf9 | 851 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
852 | f_err: |
853 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
854 | err: | |
b9908bf9 MC |
855 | statem_set_error(s); |
856 | return MSG_PROCESS_ERROR; | |
0f113f3e | 857 | } |
d02b48c6 | 858 | |
36d16f8e | 859 | int ssl3_get_server_certificate(SSL *s) |
0f113f3e | 860 | { |
b9908bf9 MC |
861 | long n; |
862 | int ok, al; | |
0f113f3e MC |
863 | |
864 | n = s->method->ssl_get_message(s, | |
865 | SSL3_ST_CR_CERT_A, | |
866 | SSL3_ST_CR_CERT_B, | |
867 | -1, s->max_cert_list, &ok); | |
868 | ||
869 | if (!ok) | |
870 | return ((int)n); | |
871 | ||
55a9a16f | 872 | if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) { |
0f113f3e MC |
873 | s->s3->tmp.reuse_message = 1; |
874 | return (1); | |
875 | } | |
876 | ||
877 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) { | |
878 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
879 | SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, SSL_R_BAD_MESSAGE_TYPE); | |
880 | goto f_err; | |
881 | } | |
df758a85 | 882 | |
b9908bf9 MC |
883 | return tls_process_server_certificate(s, (unsigned long)n); |
884 | f_err: | |
885 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
886 | s->state = SSL_ST_ERR; | |
887 | return -1; | |
888 | } | |
889 | ||
890 | enum MSG_PROCESS_RETURN tls_process_server_certificate(SSL *s, unsigned long n) | |
891 | { | |
892 | int al, i, ret = MSG_PROCESS_ERROR, exp_idx; | |
893 | unsigned long cert_list_len, cert_len; | |
894 | X509 *x = NULL; | |
895 | unsigned char *certstart, *certbytes; | |
896 | STACK_OF(X509) *sk = NULL; | |
897 | EVP_PKEY *pkey = NULL; | |
898 | PACKET pkt; | |
899 | ||
df758a85 MC |
900 | if (!PACKET_buf_init(&pkt, s->init_msg, n)) { |
901 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 902 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_INTERNAL_ERROR); |
df758a85 MC |
903 | goto f_err; |
904 | } | |
0f113f3e MC |
905 | |
906 | if ((sk = sk_X509_new_null()) == NULL) { | |
b9908bf9 | 907 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 908 | goto err; |
0f113f3e MC |
909 | } |
910 | ||
df758a85 MC |
911 | if (!PACKET_get_net_3(&pkt, &cert_list_len) |
912 | || PACKET_remaining(&pkt) != cert_list_len) { | |
0f113f3e | 913 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 914 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
915 | goto f_err; |
916 | } | |
df758a85 MC |
917 | while (PACKET_remaining(&pkt)) { |
918 | if (!PACKET_get_net_3(&pkt, &cert_len) | |
919 | || !PACKET_get_bytes(&pkt, &certbytes, cert_len)) { | |
0f113f3e | 920 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 921 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
922 | SSL_R_CERT_LENGTH_MISMATCH); |
923 | goto f_err; | |
924 | } | |
925 | ||
df758a85 MC |
926 | certstart = certbytes; |
927 | x = d2i_X509(NULL, (const unsigned char **)&certbytes, cert_len); | |
0f113f3e MC |
928 | if (x == NULL) { |
929 | al = SSL_AD_BAD_CERTIFICATE; | |
b9908bf9 | 930 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_ASN1_LIB); |
0f113f3e MC |
931 | goto f_err; |
932 | } | |
df758a85 | 933 | if (certbytes != (certstart + cert_len)) { |
0f113f3e | 934 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 935 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
936 | SSL_R_CERT_LENGTH_MISMATCH); |
937 | goto f_err; | |
938 | } | |
939 | if (!sk_X509_push(sk, x)) { | |
b9908bf9 | 940 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, ERR_R_MALLOC_FAILURE); |
cc273a93 | 941 | goto err; |
0f113f3e MC |
942 | } |
943 | x = NULL; | |
0f113f3e MC |
944 | } |
945 | ||
946 | i = ssl_verify_cert_chain(s, sk); | |
55a9a16f | 947 | if (s->verify_mode != SSL_VERIFY_NONE && i <= 0) { |
0f113f3e | 948 | al = ssl_verify_alarm_type(s->verify_result); |
b9908bf9 | 949 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
950 | SSL_R_CERTIFICATE_VERIFY_FAILED); |
951 | goto f_err; | |
952 | } | |
953 | ERR_clear_error(); /* but we keep s->verify_result */ | |
954 | if (i > 1) { | |
b9908bf9 | 955 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, i); |
0f113f3e MC |
956 | al = SSL_AD_HANDSHAKE_FAILURE; |
957 | goto f_err; | |
958 | } | |
959 | ||
c34b0f99 | 960 | s->session->peer_chain = sk; |
0f113f3e MC |
961 | /* |
962 | * Inconsistency alert: cert_chain does include the peer's certificate, | |
963 | * which we don't include in s3_srvr.c | |
964 | */ | |
965 | x = sk_X509_value(sk, 0); | |
966 | sk = NULL; | |
967 | /* | |
968 | * VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end | |
969 | */ | |
970 | ||
971 | pkey = X509_get_pubkey(x); | |
972 | ||
55a9a16f | 973 | if (pkey == NULL || EVP_PKEY_missing_parameters(pkey)) { |
0f113f3e MC |
974 | x = NULL; |
975 | al = SSL3_AL_FATAL; | |
b9908bf9 | 976 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
977 | SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); |
978 | goto f_err; | |
979 | } | |
980 | ||
981 | i = ssl_cert_type(x, pkey); | |
55a9a16f | 982 | if (i < 0) { |
0f113f3e MC |
983 | x = NULL; |
984 | al = SSL3_AL_FATAL; | |
b9908bf9 | 985 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
0f113f3e MC |
986 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); |
987 | goto f_err; | |
988 | } | |
989 | ||
55a9a16f MC |
990 | exp_idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); |
991 | if (exp_idx >= 0 && i != exp_idx) { | |
992 | x = NULL; | |
993 | al = SSL_AD_ILLEGAL_PARAMETER; | |
b9908bf9 | 994 | SSLerr(SSL_F_TLS_PROCESS_SERVER_CERTIFICATE, |
55a9a16f MC |
995 | SSL_R_WRONG_CERTIFICATE_TYPE); |
996 | goto f_err; | |
0f113f3e | 997 | } |
a273c6ee | 998 | s->session->peer_type = i; |
55a9a16f MC |
999 | |
1000 | X509_free(s->session->peer); | |
05f0fb9f | 1001 | X509_up_ref(x); |
55a9a16f | 1002 | s->session->peer = x; |
0f113f3e MC |
1003 | s->session->verify_result = s->verify_result; |
1004 | ||
1005 | x = NULL; | |
b9908bf9 | 1006 | ret = MSG_PROCESS_CONTINUE_READING; |
66696478 RS |
1007 | goto done; |
1008 | ||
0f113f3e | 1009 | f_err: |
66696478 | 1010 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
cc273a93 | 1011 | err: |
b9908bf9 | 1012 | statem_set_error(s); |
66696478 | 1013 | done: |
0f113f3e MC |
1014 | EVP_PKEY_free(pkey); |
1015 | X509_free(x); | |
1016 | sk_X509_pop_free(sk, X509_free); | |
b9908bf9 | 1017 | return ret; |
0f113f3e | 1018 | } |
d02b48c6 | 1019 | |
36d16f8e | 1020 | int ssl3_get_key_exchange(SSL *s) |
0f113f3e | 1021 | { |
b9908bf9 MC |
1022 | long n; |
1023 | int ok; | |
1024 | long alg_k; | |
0f113f3e MC |
1025 | |
1026 | /* | |
1027 | * use same message size as in ssl3_get_certificate_request() as | |
1028 | * ServerKeyExchange message may be skipped | |
1029 | */ | |
1030 | n = s->method->ssl_get_message(s, | |
1031 | SSL3_ST_CR_KEY_EXCH_A, | |
1032 | SSL3_ST_CR_KEY_EXCH_B, | |
1033 | -1, s->max_cert_list, &ok); | |
1034 | if (!ok) | |
1035 | return ((int)n); | |
1036 | ||
1037 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
b9908bf9 | 1038 | |
0f113f3e MC |
1039 | if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) { |
1040 | /* | |
1041 | * Can't skip server key exchange if this is an ephemeral | |
1042 | * ciphersuite. | |
1043 | */ | |
7689082b | 1044 | if (alg_k & (SSL_kDHE | SSL_kECDHE | SSL_kDHEPSK | SSL_kECDHEPSK)) { |
0f113f3e | 1045 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
b9908bf9 MC |
1046 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); |
1047 | return -1; | |
0f113f3e | 1048 | } |
a16ca4e8 | 1049 | |
0f113f3e | 1050 | s->s3->tmp.reuse_message = 1; |
b9908bf9 | 1051 | return 1; |
0f113f3e MC |
1052 | } |
1053 | ||
b9908bf9 MC |
1054 | return tls_process_key_exchange(s, (unsigned long)n); |
1055 | } | |
1056 | ||
1057 | enum MSG_PROCESS_RETURN tls_process_key_exchange(SSL *s, unsigned long n) | |
1058 | { | |
1059 | #ifndef OPENSSL_NO_RSA | |
1060 | unsigned char *q, md_buf[EVP_MAX_MD_SIZE * 2]; | |
1061 | #endif | |
1062 | EVP_MD_CTX md_ctx; | |
1063 | int al, j, verify_ret; | |
1064 | long alg_k, alg_a; | |
1065 | EVP_PKEY *pkey = NULL; | |
1066 | const EVP_MD *md = NULL; | |
1067 | #ifndef OPENSSL_NO_RSA | |
1068 | RSA *rsa = NULL; | |
1069 | #endif | |
1070 | #ifndef OPENSSL_NO_DH | |
1071 | DH *dh = NULL; | |
1072 | #endif | |
1073 | #ifndef OPENSSL_NO_EC | |
1074 | EC_KEY *ecdh = NULL; | |
1075 | BN_CTX *bn_ctx = NULL; | |
1076 | EC_POINT *srvr_ecpoint = NULL; | |
1077 | int curve_nid = 0; | |
1078 | #endif | |
1079 | PACKET pkt, save_param_start, signature; | |
1080 | ||
1081 | EVP_MD_CTX_init(&md_ctx); | |
1082 | ||
1083 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
1084 | ||
4bd16463 | 1085 | if (!PACKET_buf_init(&pkt, s->init_msg, n)) { |
8098fc56 MC |
1086 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
1087 | al = SSL_AD_INTERNAL_ERROR; | |
1088 | goto f_err; | |
1089 | } | |
4bd16463 | 1090 | save_param_start = pkt; |
8d92c1f8 | 1091 | |
bc36ee62 | 1092 | #ifndef OPENSSL_NO_RSA |
8d92c1f8 DSH |
1093 | RSA_free(s->s3->peer_rsa_tmp); |
1094 | s->s3->peer_rsa_tmp = NULL; | |
d02b48c6 | 1095 | #endif |
bc36ee62 | 1096 | #ifndef OPENSSL_NO_DH |
8d92c1f8 DSH |
1097 | DH_free(s->s3->peer_dh_tmp); |
1098 | s->s3->peer_dh_tmp = NULL; | |
ea262260 | 1099 | #endif |
10bf4fc2 | 1100 | #ifndef OPENSSL_NO_EC |
8d92c1f8 DSH |
1101 | EC_KEY_free(s->s3->peer_ecdh_tmp); |
1102 | s->s3->peer_ecdh_tmp = NULL; | |
d02b48c6 | 1103 | #endif |
8d92c1f8 | 1104 | |
0f113f3e | 1105 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; |
d02b48c6 | 1106 | |
0f113f3e | 1107 | al = SSL_AD_DECODE_ERROR; |
f2be92b9 | 1108 | |
ddac1974 | 1109 | #ifndef OPENSSL_NO_PSK |
7689082b DSH |
1110 | /* PSK ciphersuites are preceded by an identity hint */ |
1111 | if (alg_k & SSL_PSK) { | |
32942870 EK |
1112 | PACKET psk_identity_hint; |
1113 | if (!PACKET_get_length_prefixed_2(&pkt, &psk_identity_hint)) { | |
1114 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
1115 | goto f_err; |
1116 | } | |
0f113f3e MC |
1117 | |
1118 | /* | |
1119 | * Store PSK identity hint for later use, hint is used in | |
1120 | * ssl3_send_client_key_exchange. Assume that the maximum length of | |
1121 | * a PSK identity hint can be as long as the maximum length of a PSK | |
1122 | * identity. | |
1123 | */ | |
32942870 | 1124 | if (PACKET_remaining(&psk_identity_hint) > PSK_MAX_IDENTITY_LEN) { |
0f113f3e | 1125 | al = SSL_AD_HANDSHAKE_FAILURE; |
b9908bf9 | 1126 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DATA_LENGTH_TOO_LONG); |
0f113f3e MC |
1127 | goto f_err; |
1128 | } | |
8098fc56 | 1129 | |
32942870 EK |
1130 | if (!PACKET_strndup(&psk_identity_hint, |
1131 | &s->session->psk_identity_hint)) { | |
1132 | al = SSL_AD_INTERNAL_ERROR; | |
1133 | goto f_err; | |
0f113f3e | 1134 | } |
7689082b DSH |
1135 | } |
1136 | ||
1137 | /* Nothing else to do for plain PSK or RSAPSK */ | |
1138 | if (alg_k & (SSL_kPSK | SSL_kRSAPSK)) { | |
0f113f3e MC |
1139 | } else |
1140 | #endif /* !OPENSSL_NO_PSK */ | |
edc032b5 | 1141 | #ifndef OPENSSL_NO_SRP |
0f113f3e | 1142 | if (alg_k & SSL_kSRP) { |
32942870 EK |
1143 | PACKET prime, generator, salt, server_pub; |
1144 | if (!PACKET_get_length_prefixed_2(&pkt, &prime) | |
1145 | || !PACKET_get_length_prefixed_2(&pkt, &generator) | |
1146 | || !PACKET_get_length_prefixed_1(&pkt, &salt) | |
1147 | || !PACKET_get_length_prefixed_2(&pkt, &server_pub)) { | |
1148 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
1149 | goto f_err; |
1150 | } | |
0f113f3e | 1151 | |
32942870 EK |
1152 | if ((s->srp_ctx.N = |
1153 | BN_bin2bn(PACKET_data(&prime), | |
1154 | PACKET_remaining(&prime), NULL)) == NULL | |
1155 | || (s->srp_ctx.g = | |
1156 | BN_bin2bn(PACKET_data(&generator), | |
1157 | PACKET_remaining(&generator), NULL)) == NULL | |
1158 | || (s->srp_ctx.s = | |
1159 | BN_bin2bn(PACKET_data(&salt), | |
1160 | PACKET_remaining(&salt), NULL)) == NULL | |
1161 | || (s->srp_ctx.B = | |
1162 | BN_bin2bn(PACKET_data(&server_pub), | |
1163 | PACKET_remaining(&server_pub), NULL)) == NULL) { | |
0f113f3e MC |
1164 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1165 | goto err; | |
1166 | } | |
0f113f3e MC |
1167 | |
1168 | if (!srp_verify_server_param(s, &al)) { | |
b9908bf9 | 1169 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SRP_PARAMETERS); |
0f113f3e MC |
1170 | goto f_err; |
1171 | } | |
0989790b | 1172 | |
edc032b5 | 1173 | /* We must check if there is a certificate */ |
8df53b7a | 1174 | if (alg_a & (SSL_aRSA|SSL_aDSS)) |
a273c6ee | 1175 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e MC |
1176 | } else |
1177 | #endif /* !OPENSSL_NO_SRP */ | |
edc032b5 | 1178 | #ifndef OPENSSL_NO_RSA |
0f113f3e | 1179 | if (alg_k & SSL_kRSA) { |
32942870 | 1180 | PACKET mod, exp; |
0f113f3e MC |
1181 | /* Temporary RSA keys only allowed in export ciphersuites */ |
1182 | if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) { | |
1183 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 1184 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
0f113f3e MC |
1185 | goto f_err; |
1186 | } | |
0f113f3e | 1187 | |
32942870 EK |
1188 | if (!PACKET_get_length_prefixed_2(&pkt, &mod) |
1189 | || !PACKET_get_length_prefixed_2(&pkt, &exp)) { | |
1190 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
1191 | goto f_err; |
1192 | } | |
0f113f3e | 1193 | |
32942870 EK |
1194 | if ((rsa = RSA_new()) == NULL) { |
1195 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); | |
0f113f3e MC |
1196 | goto err; |
1197 | } | |
0f113f3e | 1198 | |
32942870 EK |
1199 | if ((rsa->n = BN_bin2bn(PACKET_data(&mod), PACKET_remaining(&mod), |
1200 | rsa->n)) == NULL | |
1201 | || (rsa->e = BN_bin2bn(PACKET_data(&exp), PACKET_remaining(&exp), | |
1202 | rsa->e)) == NULL) { | |
0f113f3e MC |
1203 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1204 | goto err; | |
1205 | } | |
0f113f3e MC |
1206 | |
1207 | /* this should be because we are using an export cipher */ | |
1208 | if (alg_a & SSL_aRSA) | |
a273c6ee | 1209 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e | 1210 | else { |
b9908bf9 | 1211 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
0f113f3e MC |
1212 | goto err; |
1213 | } | |
1dece951 KR |
1214 | |
1215 | if (EVP_PKEY_bits(pkey) <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { | |
1216 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 1217 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
1dece951 KR |
1218 | goto f_err; |
1219 | } | |
1220 | ||
8d92c1f8 | 1221 | s->s3->peer_rsa_tmp = rsa; |
0f113f3e MC |
1222 | rsa = NULL; |
1223 | } | |
1224 | #else /* OPENSSL_NO_RSA */ | |
1225 | if (0) ; | |
d02b48c6 | 1226 | #endif |
bc36ee62 | 1227 | #ifndef OPENSSL_NO_DH |
7689082b | 1228 | else if (alg_k & (SSL_kDHE | SSL_kDHEPSK)) { |
32942870 | 1229 | PACKET prime, generator, pub_key; |
0f113f3e | 1230 | |
32942870 EK |
1231 | if (!PACKET_get_length_prefixed_2(&pkt, &prime) |
1232 | || !PACKET_get_length_prefixed_2(&pkt, &generator) | |
1233 | || !PACKET_get_length_prefixed_2(&pkt, &pub_key)) { | |
1234 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
1235 | goto f_err; |
1236 | } | |
0f113f3e | 1237 | |
32942870 EK |
1238 | if ((dh = DH_new()) == NULL) { |
1239 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_DH_LIB); | |
0f113f3e MC |
1240 | goto err; |
1241 | } | |
0f113f3e | 1242 | |
32942870 EK |
1243 | if ((dh->p = BN_bin2bn(PACKET_data(&prime), |
1244 | PACKET_remaining(&prime), NULL)) == NULL | |
1245 | || (dh->g = BN_bin2bn(PACKET_data(&generator), | |
1246 | PACKET_remaining(&generator), NULL)) == NULL | |
1247 | || (dh->pub_key = | |
1248 | BN_bin2bn(PACKET_data(&pub_key), | |
1249 | PACKET_remaining(&pub_key), NULL)) == NULL) { | |
0f113f3e MC |
1250 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_BN_LIB); |
1251 | goto err; | |
1252 | } | |
0f113f3e | 1253 | |
32942870 EK |
1254 | if (BN_is_zero(dh->p) || BN_is_zero(dh->g) || BN_is_zero(dh->pub_key)) { |
1255 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_DH_VALUE); | |
61e72d76 GL |
1256 | goto f_err; |
1257 | } | |
1258 | ||
0f113f3e MC |
1259 | if (!ssl_security(s, SSL_SECOP_TMP_DH, DH_security_bits(dh), 0, dh)) { |
1260 | al = SSL_AD_HANDSHAKE_FAILURE; | |
b9908bf9 | 1261 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_DH_KEY_TOO_SMALL); |
0f113f3e MC |
1262 | goto f_err; |
1263 | } | |
8df53b7a | 1264 | if (alg_a & (SSL_aRSA|SSL_aDSS)) |
a273c6ee | 1265 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e MC |
1266 | /* else anonymous DH, so no certificate or pkey. */ |
1267 | ||
8d92c1f8 | 1268 | s->s3->peer_dh_tmp = dh; |
0f113f3e | 1269 | dh = NULL; |
0f113f3e MC |
1270 | } |
1271 | #endif /* !OPENSSL_NO_DH */ | |
ea262260 | 1272 | |
10bf4fc2 | 1273 | #ifndef OPENSSL_NO_EC |
7689082b | 1274 | else if (alg_k & (SSL_kECDHE | SSL_kECDHEPSK)) { |
0f113f3e MC |
1275 | EC_GROUP *ngroup; |
1276 | const EC_GROUP *group; | |
32942870 EK |
1277 | PACKET encoded_pt; |
1278 | unsigned char *ecparams; | |
0f113f3e MC |
1279 | |
1280 | if ((ecdh = EC_KEY_new()) == NULL) { | |
b9908bf9 | 1281 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1282 | goto err; |
1283 | } | |
1284 | ||
1285 | /* | |
1286 | * Extract elliptic curve parameters and the server's ephemeral ECDH | |
32942870 | 1287 | * public key. For now we only support named (not generic) curves and |
8098fc56 | 1288 | * ECParameters in this case is just three bytes. |
0f113f3e | 1289 | */ |
32942870 | 1290 | if (!PACKET_get_bytes(&pkt, &ecparams, 3)) { |
0f113f3e MC |
1291 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
1292 | goto f_err; | |
1293 | } | |
1294 | /* | |
1295 | * Check curve is one of our preferences, if not server has sent an | |
1296 | * invalid curve. ECParameters is 3 bytes. | |
1297 | */ | |
32942870 | 1298 | if (!tls1_check_curve(s, ecparams, 3)) { |
0f113f3e MC |
1299 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_WRONG_CURVE); |
1300 | goto f_err; | |
1301 | } | |
1302 | ||
32942870 | 1303 | if ((curve_nid = tls1_ec_curve_id2nid(*(ecparams + 2))) == 0) { |
0f113f3e | 1304 | al = SSL_AD_INTERNAL_ERROR; |
b9908bf9 | 1305 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
0f113f3e MC |
1306 | SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); |
1307 | goto f_err; | |
1308 | } | |
1309 | ||
1310 | ngroup = EC_GROUP_new_by_curve_name(curve_nid); | |
1311 | if (ngroup == NULL) { | |
b9908bf9 | 1312 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EC_LIB); |
0f113f3e MC |
1313 | goto err; |
1314 | } | |
1315 | if (EC_KEY_set_group(ecdh, ngroup) == 0) { | |
b9908bf9 | 1316 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_EC_LIB); |
0f113f3e MC |
1317 | goto err; |
1318 | } | |
1319 | EC_GROUP_free(ngroup); | |
1320 | ||
1321 | group = EC_KEY_get0_group(ecdh); | |
1322 | ||
1323 | if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && | |
1324 | (EC_GROUP_get_degree(group) > 163)) { | |
1325 | al = SSL_AD_EXPORT_RESTRICTION; | |
b9908bf9 | 1326 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, |
0f113f3e MC |
1327 | SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); |
1328 | goto f_err; | |
1329 | } | |
1330 | ||
0f113f3e MC |
1331 | /* Next, get the encoded ECPoint */ |
1332 | if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || | |
1333 | ((bn_ctx = BN_CTX_new()) == NULL)) { | |
b9908bf9 | 1334 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1335 | goto err; |
1336 | } | |
1337 | ||
32942870 EK |
1338 | if (!PACKET_get_length_prefixed_1(&pkt, &encoded_pt)) { |
1339 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); | |
8098fc56 MC |
1340 | goto f_err; |
1341 | } | |
0f113f3e | 1342 | |
32942870 EK |
1343 | if (EC_POINT_oct2point(group, srvr_ecpoint, PACKET_data(&encoded_pt), |
1344 | PACKET_remaining(&encoded_pt), bn_ctx) == 0) { | |
0f113f3e MC |
1345 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_BAD_ECPOINT); |
1346 | goto f_err; | |
1347 | } | |
0f113f3e MC |
1348 | |
1349 | /* | |
1350 | * The ECC/TLS specification does not mention the use of DSA to sign | |
1351 | * ECParameters in the server key exchange message. We do support RSA | |
1352 | * and ECDSA. | |
1353 | */ | |
1354 | if (0) ; | |
1355 | # ifndef OPENSSL_NO_RSA | |
1356 | else if (alg_a & SSL_aRSA) | |
a273c6ee | 1357 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e | 1358 | # endif |
10bf4fc2 | 1359 | # ifndef OPENSSL_NO_EC |
0f113f3e | 1360 | else if (alg_a & SSL_aECDSA) |
a273c6ee | 1361 | pkey = X509_get_pubkey(s->session->peer); |
0f113f3e MC |
1362 | # endif |
1363 | /* else anonymous ECDH, so no certificate or pkey. */ | |
1364 | EC_KEY_set_public_key(ecdh, srvr_ecpoint); | |
8d92c1f8 | 1365 | s->s3->peer_ecdh_tmp = ecdh; |
0f113f3e MC |
1366 | ecdh = NULL; |
1367 | BN_CTX_free(bn_ctx); | |
1368 | bn_ctx = NULL; | |
1369 | EC_POINT_free(srvr_ecpoint); | |
1370 | srvr_ecpoint = NULL; | |
1371 | } else if (alg_k) { | |
1372 | al = SSL_AD_UNEXPECTED_MESSAGE; | |
b9908bf9 | 1373 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_UNEXPECTED_MESSAGE); |
0f113f3e MC |
1374 | goto f_err; |
1375 | } | |
10bf4fc2 | 1376 | #endif /* !OPENSSL_NO_EC */ |
0f113f3e | 1377 | |
0f113f3e MC |
1378 | /* if it was signed, check the signature */ |
1379 | if (pkey != NULL) { | |
32942870 EK |
1380 | PACKET params; |
1381 | /* | |
1382 | * |pkt| now points to the beginning of the signature, so the difference | |
1383 | * equals the length of the parameters. | |
1384 | */ | |
1385 | if (!PACKET_get_sub_packet(&save_param_start, ¶ms, | |
1386 | PACKET_remaining(&save_param_start) - | |
1387 | PACKET_remaining(&pkt))) { | |
1388 | al = SSL_AD_INTERNAL_ERROR; | |
1389 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
1390 | goto f_err; | |
1391 | } | |
1392 | ||
0f113f3e | 1393 | if (SSL_USE_SIGALGS(s)) { |
32942870 | 1394 | unsigned char *sigalgs; |
0f113f3e | 1395 | int rv; |
32942870 | 1396 | if (!PACKET_get_bytes(&pkt, &sigalgs, 2)) { |
0f113f3e MC |
1397 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_TOO_SHORT); |
1398 | goto f_err; | |
1399 | } | |
32942870 | 1400 | rv = tls12_check_peer_sigalg(&md, s, sigalgs, pkey); |
0f113f3e MC |
1401 | if (rv == -1) |
1402 | goto err; | |
1403 | else if (rv == 0) { | |
1404 | goto f_err; | |
1405 | } | |
a2f9200f | 1406 | #ifdef SSL_DEBUG |
0f113f3e MC |
1407 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); |
1408 | #endif | |
32942870 | 1409 | } else { |
0f113f3e | 1410 | md = EVP_sha1(); |
32942870 | 1411 | } |
0f113f3e | 1412 | |
32942870 EK |
1413 | if (!PACKET_get_length_prefixed_2(&pkt, &signature) |
1414 | || PACKET_remaining(&pkt) != 0) { | |
1415 | SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
1416 | goto f_err; |
1417 | } | |
0f113f3e | 1418 | j = EVP_PKEY_size(pkey); |
8098fc56 | 1419 | if (j < 0) { |
b9908bf9 | 1420 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
8098fc56 MC |
1421 | goto f_err; |
1422 | } | |
0f113f3e MC |
1423 | |
1424 | /* | |
8098fc56 | 1425 | * Check signature length |
0f113f3e | 1426 | */ |
32942870 | 1427 | if (PACKET_remaining(&signature) > (size_t)j) { |
0f113f3e | 1428 | /* wrong packet length */ |
b9908bf9 | 1429 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_WRONG_SIGNATURE_LENGTH); |
0f113f3e MC |
1430 | goto f_err; |
1431 | } | |
bc36ee62 | 1432 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
1433 | if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s)) { |
1434 | int num; | |
1435 | unsigned int size; | |
1436 | ||
1437 | j = 0; | |
1438 | q = md_buf; | |
1439 | for (num = 2; num > 0; num--) { | |
1440 | EVP_MD_CTX_set_flags(&md_ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); | |
1441 | EVP_DigestInit_ex(&md_ctx, (num == 2) | |
1442 | ? s->ctx->md5 : s->ctx->sha1, NULL); | |
1443 | EVP_DigestUpdate(&md_ctx, &(s->s3->client_random[0]), | |
1444 | SSL3_RANDOM_SIZE); | |
1445 | EVP_DigestUpdate(&md_ctx, &(s->s3->server_random[0]), | |
1446 | SSL3_RANDOM_SIZE); | |
32942870 EK |
1447 | EVP_DigestUpdate(&md_ctx, PACKET_data(¶ms), |
1448 | PACKET_remaining(¶ms)); | |
0f113f3e MC |
1449 | EVP_DigestFinal_ex(&md_ctx, q, &size); |
1450 | q += size; | |
1451 | j += size; | |
1452 | } | |
8098fc56 | 1453 | verify_ret = |
32942870 EK |
1454 | RSA_verify(NID_md5_sha1, md_buf, j, PACKET_data(&signature), |
1455 | PACKET_remaining(&signature), pkey->pkey.rsa); | |
8098fc56 | 1456 | if (verify_ret < 0) { |
0f113f3e | 1457 | al = SSL_AD_DECRYPT_ERROR; |
b9908bf9 | 1458 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_RSA_DECRYPT); |
0f113f3e MC |
1459 | goto f_err; |
1460 | } | |
8098fc56 | 1461 | if (verify_ret == 0) { |
0f113f3e MC |
1462 | /* bad signature */ |
1463 | al = SSL_AD_DECRYPT_ERROR; | |
b9908bf9 | 1464 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); |
0f113f3e MC |
1465 | goto f_err; |
1466 | } | |
1467 | } else | |
1468 | #endif | |
1469 | { | |
1470 | EVP_VerifyInit_ex(&md_ctx, md, NULL); | |
1471 | EVP_VerifyUpdate(&md_ctx, &(s->s3->client_random[0]), | |
1472 | SSL3_RANDOM_SIZE); | |
1473 | EVP_VerifyUpdate(&md_ctx, &(s->s3->server_random[0]), | |
1474 | SSL3_RANDOM_SIZE); | |
32942870 EK |
1475 | EVP_VerifyUpdate(&md_ctx, PACKET_data(¶ms), |
1476 | PACKET_remaining(¶ms)); | |
1477 | if (EVP_VerifyFinal(&md_ctx, PACKET_data(&signature), | |
1478 | PACKET_remaining(&signature), pkey) <= 0) { | |
0f113f3e MC |
1479 | /* bad signature */ |
1480 | al = SSL_AD_DECRYPT_ERROR; | |
b9908bf9 | 1481 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_BAD_SIGNATURE); |
0f113f3e MC |
1482 | goto f_err; |
1483 | } | |
1484 | } | |
1485 | } else { | |
7689082b DSH |
1486 | /* aNULL, aSRP or PSK do not need public keys */ |
1487 | if (!(alg_a & (SSL_aNULL | SSL_aSRP)) && !(alg_k & SSL_PSK)) { | |
0f113f3e MC |
1488 | /* Might be wrong key type, check it */ |
1489 | if (ssl3_check_cert_and_algorithm(s)) | |
1490 | /* Otherwise this shouldn't happen */ | |
b9908bf9 | 1491 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
0f113f3e MC |
1492 | goto err; |
1493 | } | |
1494 | /* still data left over */ | |
8098fc56 | 1495 | if (PACKET_remaining(&pkt) != 0) { |
b9908bf9 | 1496 | SSLerr(SSL_F_TLS_PROCESS_KEY_EXCHANGE, SSL_R_EXTRA_DATA_IN_MESSAGE); |
0f113f3e MC |
1497 | goto f_err; |
1498 | } | |
1499 | } | |
1500 | EVP_PKEY_free(pkey); | |
1501 | EVP_MD_CTX_cleanup(&md_ctx); | |
b9908bf9 | 1502 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1503 | f_err: |
1504 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1505 | err: | |
1506 | EVP_PKEY_free(pkey); | |
bc36ee62 | 1507 | #ifndef OPENSSL_NO_RSA |
d6407083 | 1508 | RSA_free(rsa); |
6b521df3 | 1509 | #endif |
bc36ee62 | 1510 | #ifndef OPENSSL_NO_DH |
d6407083 | 1511 | DH_free(dh); |
ea262260 | 1512 | #endif |
10bf4fc2 | 1513 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
1514 | BN_CTX_free(bn_ctx); |
1515 | EC_POINT_free(srvr_ecpoint); | |
8fdc3734 | 1516 | EC_KEY_free(ecdh); |
6b521df3 | 1517 | #endif |
0f113f3e | 1518 | EVP_MD_CTX_cleanup(&md_ctx); |
b9908bf9 MC |
1519 | statem_set_error(s); |
1520 | return MSG_PROCESS_ERROR; | |
0f113f3e | 1521 | } |
d02b48c6 | 1522 | |
36d16f8e | 1523 | int ssl3_get_certificate_request(SSL *s) |
0f113f3e | 1524 | { |
b9908bf9 MC |
1525 | long n; |
1526 | int ok; | |
0f113f3e MC |
1527 | |
1528 | n = s->method->ssl_get_message(s, | |
1529 | SSL3_ST_CR_CERT_REQ_A, | |
1530 | SSL3_ST_CR_CERT_REQ_B, | |
1531 | -1, s->max_cert_list, &ok); | |
1532 | ||
1533 | if (!ok) | |
1534 | return ((int)n); | |
1535 | ||
1536 | s->s3->tmp.cert_req = 0; | |
1537 | ||
1538 | if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) { | |
1539 | s->s3->tmp.reuse_message = 1; | |
1540 | /* | |
1541 | * If we get here we don't need any cached handshake records as we | |
1542 | * wont be doing client auth. | |
1543 | */ | |
124037fd DSH |
1544 | if (!ssl3_digest_cached_records(s, 0)) |
1545 | goto err; | |
0f113f3e MC |
1546 | return (1); |
1547 | } | |
1548 | ||
1549 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) { | |
1550 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); | |
1551 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, SSL_R_WRONG_MESSAGE_TYPE); | |
1552 | goto err; | |
1553 | } | |
1554 | ||
1555 | /* TLS does not like anon-DH with client cert */ | |
1556 | if (s->version > SSL3_VERSION) { | |
1557 | if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) { | |
1558 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_UNEXPECTED_MESSAGE); | |
1559 | SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST, | |
1560 | SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); | |
1561 | goto err; | |
1562 | } | |
1563 | } | |
1564 | ||
b9908bf9 MC |
1565 | return tls_process_certificate_request(s, (unsigned long)n); |
1566 | err: | |
1567 | s->state = SSL_ST_ERR; | |
1568 | return -1; | |
1569 | } | |
1570 | ||
1571 | ||
1572 | enum MSG_PROCESS_RETURN tls_process_certificate_request(SSL *s, unsigned long n) | |
1573 | { | |
1574 | int ret = MSG_PROCESS_ERROR; | |
1575 | unsigned int list_len, ctype_num, i, name_len; | |
1576 | X509_NAME *xn = NULL; | |
1577 | unsigned char *data; | |
1578 | unsigned char *namestart, *namebytes; | |
1579 | STACK_OF(X509_NAME) *ca_sk = NULL; | |
1580 | PACKET pkt; | |
1581 | ||
ac112332 MC |
1582 | if (!PACKET_buf_init(&pkt, s->init_msg, n)) { |
1583 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 1584 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_INTERNAL_ERROR); |
ac112332 MC |
1585 | goto err; |
1586 | } | |
0f113f3e MC |
1587 | |
1588 | if ((ca_sk = sk_X509_NAME_new(ca_dn_cmp)) == NULL) { | |
b9908bf9 | 1589 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1590 | goto err; |
1591 | } | |
1592 | ||
1593 | /* get the certificate types */ | |
ac112332 MC |
1594 | if (!PACKET_get_1(&pkt, &ctype_num) |
1595 | || !PACKET_get_bytes(&pkt, &data, ctype_num)) { | |
1596 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
b9908bf9 | 1597 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
ac112332 MC |
1598 | goto err; |
1599 | } | |
b548a1f1 RS |
1600 | OPENSSL_free(s->cert->ctypes); |
1601 | s->cert->ctypes = NULL; | |
0f113f3e MC |
1602 | if (ctype_num > SSL3_CT_NUMBER) { |
1603 | /* If we exceed static buffer copy all to cert structure */ | |
1604 | s->cert->ctypes = OPENSSL_malloc(ctype_num); | |
1605 | if (s->cert->ctypes == NULL) { | |
b9908bf9 | 1606 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1607 | goto err; |
1608 | } | |
ac112332 | 1609 | memcpy(s->cert->ctypes, data, ctype_num); |
0f113f3e MC |
1610 | s->cert->ctype_num = (size_t)ctype_num; |
1611 | ctype_num = SSL3_CT_NUMBER; | |
1612 | } | |
1613 | for (i = 0; i < ctype_num; i++) | |
ac112332 MC |
1614 | s->s3->tmp.ctype[i] = data[i]; |
1615 | ||
0f113f3e | 1616 | if (SSL_USE_SIGALGS(s)) { |
ac112332 MC |
1617 | if (!PACKET_get_net_2(&pkt, &list_len) |
1618 | || !PACKET_get_bytes(&pkt, &data, list_len)) { | |
0f113f3e | 1619 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
1620 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
1621 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
1622 | goto err; |
1623 | } | |
ac112332 | 1624 | |
0f113f3e MC |
1625 | /* Clear certificate digests and validity flags */ |
1626 | for (i = 0; i < SSL_PKEY_NUM; i++) { | |
d376e57d | 1627 | s->s3->tmp.md[i] = NULL; |
6383d316 | 1628 | s->s3->tmp.valid_flags[i] = 0; |
0f113f3e | 1629 | } |
ac112332 | 1630 | if ((list_len & 1) || !tls1_save_sigalgs(s, data, list_len)) { |
0f113f3e | 1631 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1632 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
1633 | SSL_R_SIGNATURE_ALGORITHMS_ERROR); |
1634 | goto err; | |
1635 | } | |
1636 | if (!tls1_process_sigalgs(s)) { | |
1637 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 1638 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1639 | goto err; |
1640 | } | |
0f113f3e MC |
1641 | } |
1642 | ||
1643 | /* get the CA RDNs */ | |
ac112332 MC |
1644 | if (!PACKET_get_net_2(&pkt, &list_len) |
1645 | || PACKET_remaining(&pkt) != list_len) { | |
0f113f3e | 1646 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1647 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1648 | goto err; |
1649 | } | |
1650 | ||
ac112332 MC |
1651 | while (PACKET_remaining(&pkt)) { |
1652 | if (!PACKET_get_net_2(&pkt, &name_len) | |
1653 | || !PACKET_get_bytes(&pkt, &namebytes, name_len)) { | |
0f113f3e | 1654 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 MC |
1655 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
1656 | SSL_R_LENGTH_MISMATCH); | |
0f113f3e MC |
1657 | goto err; |
1658 | } | |
1659 | ||
ac112332 | 1660 | namestart = namebytes; |
0f113f3e | 1661 | |
ac112332 MC |
1662 | if ((xn = d2i_X509_NAME(NULL, (const unsigned char **)&namebytes, |
1663 | name_len)) == NULL) { | |
3c33c6f6 | 1664 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1665 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_ASN1_LIB); |
3c33c6f6 | 1666 | goto err; |
0f113f3e MC |
1667 | } |
1668 | ||
ac112332 | 1669 | if (namebytes != (namestart + name_len)) { |
0f113f3e | 1670 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); |
b9908bf9 | 1671 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, |
0f113f3e MC |
1672 | SSL_R_CA_DN_LENGTH_MISMATCH); |
1673 | goto err; | |
1674 | } | |
1675 | if (!sk_X509_NAME_push(ca_sk, xn)) { | |
b9908bf9 | 1676 | SSLerr(SSL_F_TLS_PROCESS_CERTIFICATE_REQUEST, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1677 | goto err; |
1678 | } | |
0f113f3e MC |
1679 | } |
1680 | ||
0f113f3e MC |
1681 | /* we should setup a certificate to return.... */ |
1682 | s->s3->tmp.cert_req = 1; | |
1683 | s->s3->tmp.ctype_num = ctype_num; | |
222561fe | 1684 | sk_X509_NAME_pop_free(s->s3->tmp.ca_names, X509_NAME_free); |
0f113f3e MC |
1685 | s->s3->tmp.ca_names = ca_sk; |
1686 | ca_sk = NULL; | |
1687 | ||
b9908bf9 | 1688 | ret = MSG_PROCESS_CONTINUE_READING; |
cc273a93 | 1689 | goto done; |
0f113f3e | 1690 | err: |
b9908bf9 | 1691 | statem_set_error(s); |
cc273a93 | 1692 | done: |
222561fe | 1693 | sk_X509_NAME_pop_free(ca_sk, X509_NAME_free); |
b9908bf9 | 1694 | return ret; |
0f113f3e MC |
1695 | } |
1696 | ||
1697 | static int ca_dn_cmp(const X509_NAME *const *a, const X509_NAME *const *b) | |
dfeab068 | 1698 | { |
0f113f3e | 1699 | return (X509_NAME_cmp(*a, *b)); |
dfeab068 | 1700 | } |
dfeab068 | 1701 | |
6434abbf | 1702 | int ssl3_get_new_session_ticket(SSL *s) |
0f113f3e | 1703 | { |
0f113f3e | 1704 | long n; |
b9908bf9 | 1705 | int ok; |
0f113f3e MC |
1706 | |
1707 | n = s->method->ssl_get_message(s, | |
1708 | SSL3_ST_CR_SESSION_TICKET_A, | |
1709 | SSL3_ST_CR_SESSION_TICKET_B, | |
1710 | SSL3_MT_NEWSESSION_TICKET, 16384, &ok); | |
1711 | ||
1712 | if (!ok) | |
1713 | return ((int)n); | |
1714 | ||
b9908bf9 MC |
1715 | return tls_process_new_session_ticket(s, (unsigned long)n); |
1716 | } | |
1717 | ||
1718 | enum MSG_PROCESS_RETURN tls_process_new_session_ticket(SSL *s, unsigned long n) | |
1719 | { | |
1720 | int al; | |
1721 | unsigned int ticklen; | |
1722 | unsigned long ticket_lifetime_hint; | |
1723 | PACKET pkt; | |
1724 | ||
561e12bb MC |
1725 | if (!PACKET_buf_init(&pkt, s->init_msg, n)) { |
1726 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 1727 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_INTERNAL_ERROR); |
0f113f3e MC |
1728 | goto f_err; |
1729 | } | |
1730 | ||
e711da71 EK |
1731 | if (!PACKET_get_net_4(&pkt, &ticket_lifetime_hint) |
1732 | || !PACKET_get_net_2(&pkt, &ticklen) | |
1733 | || PACKET_remaining(&pkt) != ticklen) { | |
1734 | al = SSL_AD_DECODE_ERROR; | |
1735 | SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); | |
1736 | goto f_err; | |
1737 | } | |
1738 | ||
1739 | /* Server is allowed to change its mind and send an empty ticket. */ | |
1740 | if (ticklen == 0) | |
1741 | return 1; | |
1742 | ||
98ece4ee MC |
1743 | if (s->session->session_id_length > 0) { |
1744 | int i = s->session_ctx->session_cache_mode; | |
1745 | SSL_SESSION *new_sess; | |
1746 | /* | |
1747 | * We reused an existing session, so we need to replace it with a new | |
1748 | * one | |
1749 | */ | |
1750 | if (i & SSL_SESS_CACHE_CLIENT) { | |
1751 | /* | |
1752 | * Remove the old session from the cache | |
1753 | */ | |
1754 | if (i & SSL_SESS_CACHE_NO_INTERNAL_STORE) { | |
1755 | if (s->session_ctx->remove_session_cb != NULL) | |
1756 | s->session_ctx->remove_session_cb(s->session_ctx, | |
1757 | s->session); | |
1758 | } else { | |
1759 | /* We carry on if this fails */ | |
1760 | SSL_CTX_remove_session(s->session_ctx, s->session); | |
1761 | } | |
1762 | } | |
1763 | ||
1764 | if ((new_sess = ssl_session_dup(s->session, 0)) == 0) { | |
1765 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 1766 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
98ece4ee MC |
1767 | goto f_err; |
1768 | } | |
1769 | ||
1770 | SSL_SESSION_free(s->session); | |
1771 | s->session = new_sess; | |
1772 | } | |
1773 | ||
b548a1f1 RS |
1774 | OPENSSL_free(s->session->tlsext_tick); |
1775 | s->session->tlsext_ticklen = 0; | |
e711da71 | 1776 | |
0f113f3e MC |
1777 | s->session->tlsext_tick = OPENSSL_malloc(ticklen); |
1778 | if (!s->session->tlsext_tick) { | |
b9908bf9 | 1779 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1780 | goto err; |
1781 | } | |
561e12bb MC |
1782 | if (!PACKET_copy_bytes(&pkt, s->session->tlsext_tick, ticklen)) { |
1783 | al = SSL_AD_DECODE_ERROR; | |
b9908bf9 | 1784 | SSLerr(SSL_F_TLS_PROCESS_NEW_SESSION_TICKET, SSL_R_LENGTH_MISMATCH); |
561e12bb MC |
1785 | goto f_err; |
1786 | } | |
e711da71 EK |
1787 | |
1788 | s->session->tlsext_tick_lifetime_hint = ticket_lifetime_hint; | |
0f113f3e MC |
1789 | s->session->tlsext_ticklen = ticklen; |
1790 | /* | |
1791 | * There are two ways to detect a resumed ticket session. One is to set | |
1792 | * an appropriate session ID and then the server must return a match in | |
1793 | * ServerHello. This allows the normal client session ID matching to work | |
1794 | * and we know much earlier that the ticket has been accepted. The | |
1795 | * other way is to set zero length session ID when the ticket is | |
1796 | * presented and rely on the handshake to determine session resumption. | |
1797 | * We choose the former approach because this fits in with assumptions | |
1798 | * elsewhere in OpenSSL. The session ID is set to the SHA256 (or SHA1 is | |
1799 | * SHA256 is disabled) hash of the ticket. | |
1800 | */ | |
561e12bb | 1801 | EVP_Digest(s->session->tlsext_tick, ticklen, |
0f113f3e | 1802 | s->session->session_id, &s->session->session_id_length, |
0f113f3e | 1803 | EVP_sha256(), NULL); |
b9908bf9 | 1804 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1805 | f_err: |
1806 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
1807 | err: | |
b9908bf9 MC |
1808 | statem_set_error(s); |
1809 | return MSG_PROCESS_ERROR; | |
0f113f3e | 1810 | } |
67c8e7f4 DSH |
1811 | |
1812 | int ssl3_get_cert_status(SSL *s) | |
0f113f3e | 1813 | { |
b9908bf9 MC |
1814 | long n; |
1815 | int ok; | |
0f113f3e MC |
1816 | |
1817 | n = s->method->ssl_get_message(s, | |
1818 | SSL3_ST_CR_CERT_STATUS_A, | |
1819 | SSL3_ST_CR_CERT_STATUS_B, | |
1820 | SSL3_MT_CERTIFICATE_STATUS, 16384, &ok); | |
1821 | ||
1822 | if (!ok) | |
1823 | return ((int)n); | |
ac63710a | 1824 | |
b9908bf9 MC |
1825 | return tls_process_cert_status(s, (unsigned long)n); |
1826 | } | |
1827 | ||
1828 | enum MSG_PROCESS_RETURN tls_process_cert_status(SSL *s, unsigned long n) | |
1829 | { | |
1830 | int al; | |
1831 | unsigned long resplen; | |
1832 | unsigned int type; | |
1833 | PACKET pkt; | |
1834 | ||
ac63710a MC |
1835 | if (!PACKET_buf_init(&pkt, s->init_msg, n)) { |
1836 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 1837 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_INTERNAL_ERROR); |
0f113f3e MC |
1838 | goto f_err; |
1839 | } | |
ac63710a MC |
1840 | if (!PACKET_get_1(&pkt, &type) |
1841 | || type != TLSEXT_STATUSTYPE_ocsp) { | |
0f113f3e | 1842 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1843 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_UNSUPPORTED_STATUS_TYPE); |
0f113f3e MC |
1844 | goto f_err; |
1845 | } | |
ac63710a MC |
1846 | if (!PACKET_get_net_3(&pkt, &resplen) |
1847 | || PACKET_remaining(&pkt) != resplen) { | |
0f113f3e | 1848 | al = SSL_AD_DECODE_ERROR; |
b9908bf9 | 1849 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); |
0f113f3e MC |
1850 | goto f_err; |
1851 | } | |
b548a1f1 | 1852 | OPENSSL_free(s->tlsext_ocsp_resp); |
ac63710a | 1853 | s->tlsext_ocsp_resp = OPENSSL_malloc(resplen); |
0f113f3e MC |
1854 | if (!s->tlsext_ocsp_resp) { |
1855 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 1856 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1857 | goto f_err; |
1858 | } | |
ac63710a MC |
1859 | if (!PACKET_copy_bytes(&pkt, s->tlsext_ocsp_resp, resplen)) { |
1860 | al = SSL_AD_DECODE_ERROR; | |
b9908bf9 | 1861 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_LENGTH_MISMATCH); |
ac63710a MC |
1862 | goto f_err; |
1863 | } | |
0f113f3e MC |
1864 | s->tlsext_ocsp_resplen = resplen; |
1865 | if (s->ctx->tlsext_status_cb) { | |
1866 | int ret; | |
1867 | ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); | |
1868 | if (ret == 0) { | |
1869 | al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; | |
b9908bf9 | 1870 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, SSL_R_INVALID_STATUS_RESPONSE); |
0f113f3e MC |
1871 | goto f_err; |
1872 | } | |
1873 | if (ret < 0) { | |
1874 | al = SSL_AD_INTERNAL_ERROR; | |
b9908bf9 | 1875 | SSLerr(SSL_F_TLS_PROCESS_CERT_STATUS, ERR_R_MALLOC_FAILURE); |
0f113f3e MC |
1876 | goto f_err; |
1877 | } | |
1878 | } | |
b9908bf9 | 1879 | return MSG_PROCESS_CONTINUE_READING; |
0f113f3e MC |
1880 | f_err: |
1881 | ssl3_send_alert(s, SSL3_AL_FATAL, al); | |
b9908bf9 MC |
1882 | statem_set_error(s); |
1883 | return MSG_PROCESS_ERROR; | |
0f113f3e | 1884 | } |
d02b48c6 | 1885 | |
36d16f8e | 1886 | int ssl3_get_server_done(SSL *s) |
0f113f3e | 1887 | { |
0f113f3e | 1888 | long n; |
b9908bf9 | 1889 | int ok; |
0f113f3e MC |
1890 | |
1891 | /* Second to last param should be very small, like 0 :-) */ | |
1892 | n = s->method->ssl_get_message(s, | |
1893 | SSL3_ST_CR_SRVR_DONE_A, | |
1894 | SSL3_ST_CR_SRVR_DONE_B, | |
1895 | SSL3_MT_SERVER_DONE, 30, &ok); | |
1896 | ||
1897 | if (!ok) | |
1898 | return ((int)n); | |
b9908bf9 MC |
1899 | |
1900 | return tls_process_server_done(s, (unsigned long)n); | |
1901 | } | |
1902 | ||
1903 | enum MSG_PROCESS_RETURN tls_process_server_done(SSL *s, unsigned long n) | |
1904 | { | |
0f113f3e MC |
1905 | if (n > 0) { |
1906 | /* should contain no data */ | |
1907 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_DECODE_ERROR); | |
b9908bf9 MC |
1908 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_LENGTH_MISMATCH); |
1909 | statem_set_error(s); | |
1910 | return MSG_PROCESS_ERROR; | |
0f113f3e | 1911 | } |
b9908bf9 MC |
1912 | |
1913 | #ifndef OPENSSL_NO_SRP | |
1914 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
1915 | if (SRP_Calc_A_param(s) <= 0) { | |
1916 | SSLerr(SSL_F_TLS_PROCESS_SERVER_DONE, SSL_R_SRP_A_CALC); | |
1917 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
1918 | statem_set_error(s); | |
1919 | return MSG_PROCESS_ERROR; | |
1920 | } | |
1921 | } | |
1922 | #endif | |
1923 | ||
1924 | return MSG_PROCESS_FINISHED_READING; | |
0f113f3e | 1925 | } |
176f31dd | 1926 | |
36d16f8e | 1927 | int ssl3_send_client_key_exchange(SSL *s) |
b9908bf9 MC |
1928 | { |
1929 | int n; | |
1930 | ||
1931 | if (s->state == SSL3_ST_CW_KEY_EXCH_A) { | |
1932 | if(tls_construct_client_key_exchange(s) == 0) | |
1933 | goto err; | |
1934 | ||
1935 | s->state = SSL3_ST_CW_KEY_EXCH_B; | |
1936 | } | |
1937 | ||
1938 | /* SSL3_ST_CW_KEY_EXCH_B */ | |
1939 | n = ssl_do_write(s); | |
1940 | ||
1941 | if (n > 0) { | |
1942 | if (tls_client_key_exchange_post_work(s) == 0) | |
1943 | goto err; | |
1944 | } | |
1945 | ||
1946 | return n; | |
1947 | err: | |
1948 | s->state = SSL_ST_ERR; | |
1949 | return -1; | |
1950 | ||
1951 | } | |
1952 | ||
1953 | int tls_construct_client_key_exchange(SSL *s) | |
0f113f3e MC |
1954 | { |
1955 | unsigned char *p; | |
1956 | int n; | |
7689082b DSH |
1957 | #ifndef OPENSSL_NO_PSK |
1958 | size_t pskhdrlen = 0; | |
1959 | #endif | |
0f113f3e | 1960 | unsigned long alg_k; |
bc36ee62 | 1961 | #ifndef OPENSSL_NO_RSA |
0f113f3e MC |
1962 | unsigned char *q; |
1963 | EVP_PKEY *pkey = NULL; | |
79df9d62 | 1964 | #endif |
10bf4fc2 | 1965 | #ifndef OPENSSL_NO_EC |
0f113f3e MC |
1966 | EC_KEY *clnt_ecdh = NULL; |
1967 | const EC_POINT *srvr_ecpoint = NULL; | |
1968 | EVP_PKEY *srvr_pub_pkey = NULL; | |
1969 | unsigned char *encodedPoint = NULL; | |
1970 | int encoded_pt_len = 0; | |
1971 | BN_CTX *bn_ctx = NULL; | |
ea262260 | 1972 | #endif |
c660ec63 DSH |
1973 | unsigned char *pms = NULL; |
1974 | size_t pmslen = 0; | |
7689082b | 1975 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
d02b48c6 | 1976 | |
b9908bf9 | 1977 | p = ssl_handshake_start(s); |
d02b48c6 | 1978 | |
7689082b DSH |
1979 | |
1980 | #ifndef OPENSSL_NO_PSK | |
b9908bf9 MC |
1981 | if (alg_k & SSL_PSK) { |
1982 | int psk_err = 1; | |
1983 | /* | |
1984 | * The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes to return a | |
1985 | * \0-terminated identity. The last byte is for us for simulating | |
1986 | * strnlen. | |
1987 | */ | |
1988 | char identity[PSK_MAX_IDENTITY_LEN + 1]; | |
1989 | size_t identitylen; | |
1990 | unsigned char psk[PSK_MAX_PSK_LEN]; | |
1991 | size_t psklen; | |
1992 | ||
1993 | if (s->psk_client_callback == NULL) { | |
1994 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
1995 | SSL_R_PSK_NO_CLIENT_CB); | |
1996 | goto err; | |
1997 | } | |
7689082b | 1998 | |
b9908bf9 | 1999 | memset(identity, 0, sizeof(identity)); |
7689082b | 2000 | |
b9908bf9 MC |
2001 | psklen = s->psk_client_callback(s, s->session->psk_identity_hint, |
2002 | identity, sizeof(identity) - 1, | |
2003 | psk, sizeof(psk)); | |
7689082b | 2004 | |
b9908bf9 MC |
2005 | if (psklen > PSK_MAX_PSK_LEN) { |
2006 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2007 | ERR_R_INTERNAL_ERROR); | |
2008 | goto psk_err; | |
2009 | } else if (psklen == 0) { | |
2010 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2011 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
2012 | goto psk_err; | |
2013 | } | |
7689082b | 2014 | |
b9908bf9 MC |
2015 | OPENSSL_free(s->s3->tmp.psk); |
2016 | s->s3->tmp.psk = BUF_memdup(psk, psklen); | |
2017 | OPENSSL_cleanse(psk, psklen); | |
7689082b | 2018 | |
b9908bf9 MC |
2019 | if (s->s3->tmp.psk == NULL) { |
2020 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2021 | goto memerr; | |
2022 | } | |
7689082b | 2023 | |
b9908bf9 | 2024 | s->s3->tmp.psklen = psklen; |
7689082b | 2025 | |
b9908bf9 MC |
2026 | identitylen = strlen(identity); |
2027 | if (identitylen > PSK_MAX_IDENTITY_LEN) { | |
2028 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2029 | ERR_R_INTERNAL_ERROR); | |
2030 | goto psk_err; | |
2031 | } | |
2032 | OPENSSL_free(s->session->psk_identity); | |
2033 | s->session->psk_identity = BUF_strdup(identity); | |
2034 | if (s->session->psk_identity == NULL) { | |
7689082b | 2035 | OPENSSL_cleanse(identity, sizeof(identity)); |
b9908bf9 | 2036 | goto memerr; |
7689082b | 2037 | } |
d02b48c6 | 2038 | |
b9908bf9 MC |
2039 | s2n(identitylen, p); |
2040 | memcpy(p, identity, identitylen); | |
2041 | pskhdrlen = 2 + identitylen; | |
2042 | p += identitylen; | |
2043 | psk_err = 0; | |
2044 | psk_err: | |
2045 | OPENSSL_cleanse(identity, sizeof(identity)); | |
2046 | if (psk_err != 0) { | |
2047 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2048 | goto err; | |
0f113f3e | 2049 | } |
b9908bf9 MC |
2050 | } |
2051 | if (alg_k & SSL_kPSK) { | |
2052 | n = 0; | |
2053 | } else | |
2054 | #endif | |
2055 | ||
2056 | /* Fool emacs indentation */ | |
2057 | if (0) { | |
2058 | } | |
bc36ee62 | 2059 | #ifndef OPENSSL_NO_RSA |
b9908bf9 MC |
2060 | else if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
2061 | RSA *rsa; | |
2062 | pmslen = SSL_MAX_MASTER_KEY_LENGTH; | |
2063 | pms = OPENSSL_malloc(pmslen); | |
2064 | if (!pms) | |
2065 | goto memerr; | |
2066 | ||
2067 | if (s->session->peer == NULL) { | |
2068 | /* | |
2069 | * We should always have a server certificate with SSL_kRSA. | |
2070 | */ | |
2071 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2072 | ERR_R_INTERNAL_ERROR); | |
2073 | goto err; | |
2074 | } | |
0f113f3e | 2075 | |
b9908bf9 MC |
2076 | if (s->s3->peer_rsa_tmp != NULL) |
2077 | rsa = s->s3->peer_rsa_tmp; | |
2078 | else { | |
2079 | pkey = X509_get_pubkey(s->session->peer); | |
2080 | if ((pkey == NULL) || (pkey->type != EVP_PKEY_RSA) | |
2081 | || (pkey->pkey.rsa == NULL)) { | |
2082 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2083 | ERR_R_INTERNAL_ERROR); | |
0f113f3e | 2084 | EVP_PKEY_free(pkey); |
b9908bf9 | 2085 | goto err; |
0f113f3e | 2086 | } |
b9908bf9 MC |
2087 | rsa = pkey->pkey.rsa; |
2088 | EVP_PKEY_free(pkey); | |
2089 | } | |
0f113f3e | 2090 | |
b9908bf9 MC |
2091 | pms[0] = s->client_version >> 8; |
2092 | pms[1] = s->client_version & 0xff; | |
2093 | if (RAND_bytes(pms + 2, pmslen - 2) <= 0) | |
2094 | goto err; | |
0f113f3e | 2095 | |
b9908bf9 MC |
2096 | q = p; |
2097 | /* Fix buf for TLS and beyond */ | |
2098 | if (s->version > SSL3_VERSION) | |
2099 | p += 2; | |
2100 | n = RSA_public_encrypt(pmslen, pms, p, rsa, RSA_PKCS1_PADDING); | |
0f113f3e | 2101 | # ifdef PKCS1_CHECK |
b9908bf9 MC |
2102 | if (s->options & SSL_OP_PKCS1_CHECK_1) |
2103 | p[1]++; | |
2104 | if (s->options & SSL_OP_PKCS1_CHECK_2) | |
2105 | tmp_buf[0] = 0x70; | |
0f113f3e | 2106 | # endif |
b9908bf9 MC |
2107 | if (n <= 0) { |
2108 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2109 | SSL_R_BAD_RSA_ENCRYPT); | |
2110 | goto err; | |
2111 | } | |
0f113f3e | 2112 | |
b9908bf9 MC |
2113 | /* Fix buf for TLS and beyond */ |
2114 | if (s->version > SSL3_VERSION) { | |
2115 | s2n(n, q); | |
2116 | n += 2; | |
0f113f3e | 2117 | } |
b9908bf9 | 2118 | } |
f9b3bff6 | 2119 | #endif |
bc36ee62 | 2120 | #ifndef OPENSSL_NO_DH |
b9908bf9 MC |
2121 | else if (alg_k & (SSL_kDHE | SSL_kDHr | SSL_kDHd | SSL_kDHEPSK)) { |
2122 | DH *dh_srvr, *dh_clnt; | |
2123 | if (s->s3->peer_dh_tmp != NULL) | |
2124 | dh_srvr = s->s3->peer_dh_tmp; | |
2125 | else { | |
2126 | /* we get them from the cert */ | |
2127 | EVP_PKEY *spkey = NULL; | |
2128 | dh_srvr = NULL; | |
2129 | spkey = X509_get_pubkey(s->session->peer); | |
2130 | if (spkey) { | |
2131 | dh_srvr = EVP_PKEY_get1_DH(spkey); | |
2132 | EVP_PKEY_free(spkey); | |
0f113f3e | 2133 | } |
b9908bf9 MC |
2134 | if (dh_srvr == NULL) { |
2135 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2136 | ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
2137 | goto err; |
2138 | } | |
0f113f3e | 2139 | } |
b9908bf9 MC |
2140 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) { |
2141 | /* Use client certificate key */ | |
2142 | EVP_PKEY *clkey = s->cert->key->privatekey; | |
2143 | dh_clnt = NULL; | |
2144 | if (clkey) | |
2145 | dh_clnt = EVP_PKEY_get1_DH(clkey); | |
2146 | if (dh_clnt == NULL) { | |
2147 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
0f113f3e MC |
2148 | ERR_R_INTERNAL_ERROR); |
2149 | goto err; | |
2150 | } | |
b9908bf9 MC |
2151 | } else { |
2152 | /* generate a new random key */ | |
2153 | if ((dh_clnt = DHparams_dup(dh_srvr)) == NULL) { | |
2154 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); | |
0f113f3e MC |
2155 | goto err; |
2156 | } | |
b9908bf9 MC |
2157 | if (!DH_generate_key(dh_clnt)) { |
2158 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); | |
2159 | DH_free(dh_clnt); | |
0f113f3e MC |
2160 | goto err; |
2161 | } | |
b9908bf9 | 2162 | } |
0f113f3e | 2163 | |
b9908bf9 MC |
2164 | pmslen = DH_size(dh_clnt); |
2165 | pms = OPENSSL_malloc(pmslen); | |
2166 | if (!pms) | |
2167 | goto memerr; | |
0f113f3e | 2168 | |
b9908bf9 MC |
2169 | /* |
2170 | * use the 'p' output buffer for the DH key, but make sure to | |
2171 | * clear it out afterwards | |
2172 | */ | |
0f113f3e | 2173 | |
b9908bf9 MC |
2174 | n = DH_compute_key(pms, dh_srvr->pub_key, dh_clnt); |
2175 | if (s->s3->peer_dh_tmp == NULL) | |
2176 | DH_free(dh_srvr); | |
0f113f3e | 2177 | |
b9908bf9 MC |
2178 | if (n <= 0) { |
2179 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_DH_LIB); | |
2180 | DH_free(dh_clnt); | |
2181 | goto err; | |
2182 | } | |
2183 | pmslen = n; | |
0f113f3e | 2184 | |
b9908bf9 MC |
2185 | if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) |
2186 | n = 0; | |
2187 | else { | |
2188 | /* send off the data */ | |
2189 | n = BN_num_bytes(dh_clnt->pub_key); | |
2190 | s2n(n, p); | |
2191 | BN_bn2bin(dh_clnt->pub_key, p); | |
2192 | n += 2; | |
0f113f3e | 2193 | } |
c660ec63 | 2194 | |
b9908bf9 MC |
2195 | DH_free(dh_clnt); |
2196 | } | |
2197 | #endif | |
0f113f3e | 2198 | |
b9908bf9 MC |
2199 | #ifndef OPENSSL_NO_EC |
2200 | else if (alg_k & (SSL_kECDHE | SSL_kECDHr | SSL_kECDHe | SSL_kECDHEPSK)) { | |
2201 | const EC_GROUP *srvr_group = NULL; | |
2202 | EC_KEY *tkey; | |
2203 | int ecdh_clnt_cert = 0; | |
2204 | int field_size = 0; | |
2205 | /* | |
2206 | * Did we send out the client's ECDH share for use in premaster | |
2207 | * computation as part of client certificate? If so, set | |
2208 | * ecdh_clnt_cert to 1. | |
2209 | */ | |
2210 | if ((alg_k & (SSL_kECDHr | SSL_kECDHe)) && (s->cert != NULL)) { | |
2211 | /*- | |
2212 | * XXX: For now, we do not support client | |
2213 | * authentication using ECDH certificates. | |
2214 | * To add such support, one needs to add | |
2215 | * code that checks for appropriate | |
2216 | * conditions and sets ecdh_clnt_cert to 1. | |
2217 | * For example, the cert have an ECC | |
2218 | * key on the same curve as the server's | |
2219 | * and the key should be authorized for | |
2220 | * key agreement. | |
0f113f3e | 2221 | * |
b9908bf9 MC |
2222 | * One also needs to add code in ssl3_connect |
2223 | * to skip sending the certificate verify | |
2224 | * message. | |
2225 | * | |
2226 | * if ((s->cert->key->privatekey != NULL) && | |
2227 | * (s->cert->key->privatekey->type == | |
2228 | * EVP_PKEY_EC) && ...) | |
2229 | * ecdh_clnt_cert = 1; | |
0f113f3e | 2230 | */ |
b9908bf9 | 2231 | } |
0f113f3e | 2232 | |
b9908bf9 MC |
2233 | if (s->s3->peer_ecdh_tmp != NULL) { |
2234 | tkey = s->s3->peer_ecdh_tmp; | |
2235 | } else { | |
2236 | /* Get the Server Public Key from Cert */ | |
2237 | srvr_pub_pkey = X509_get_pubkey(s->session->peer); | |
2238 | if ((srvr_pub_pkey == NULL) | |
2239 | || (srvr_pub_pkey->type != EVP_PKEY_EC) | |
2240 | || (srvr_pub_pkey->pkey.ec == NULL)) { | |
2241 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
266483d2 MC |
2242 | ERR_R_INTERNAL_ERROR); |
2243 | goto err; | |
0f113f3e | 2244 | } |
b9908bf9 MC |
2245 | |
2246 | tkey = srvr_pub_pkey->pkey.ec; | |
2247 | } | |
2248 | ||
2249 | srvr_group = EC_KEY_get0_group(tkey); | |
2250 | srvr_ecpoint = EC_KEY_get0_public_key(tkey); | |
2251 | ||
2252 | if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) { | |
2253 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2254 | ERR_R_INTERNAL_ERROR); | |
2255 | goto err; | |
2256 | } | |
2257 | ||
2258 | if ((clnt_ecdh = EC_KEY_new()) == NULL) { | |
2259 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2260 | ERR_R_MALLOC_FAILURE); | |
2261 | goto err; | |
2262 | } | |
2263 | ||
2264 | if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) { | |
2265 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); | |
2266 | goto err; | |
2267 | } | |
2268 | if (ecdh_clnt_cert) { | |
0f113f3e | 2269 | /* |
b9908bf9 MC |
2270 | * Reuse key info from our certificate We only need our |
2271 | * private key to perform the ECDH computation. | |
0f113f3e | 2272 | */ |
b9908bf9 MC |
2273 | const BIGNUM *priv_key; |
2274 | tkey = s->cert->key->privatekey->pkey.ec; | |
2275 | priv_key = EC_KEY_get0_private_key(tkey); | |
2276 | if (priv_key == NULL) { | |
2277 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2278 | ERR_R_MALLOC_FAILURE); | |
0f113f3e MC |
2279 | goto err; |
2280 | } | |
b9908bf9 MC |
2281 | if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) { |
2282 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_EC_LIB); | |
0f113f3e MC |
2283 | goto err; |
2284 | } | |
b9908bf9 MC |
2285 | } else { |
2286 | /* Generate a new ECDH key pair */ | |
2287 | if (!(EC_KEY_generate_key(clnt_ecdh))) { | |
2288 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2289 | ERR_R_ECDH_LIB); | |
2290 | goto err; | |
0f113f3e | 2291 | } |
b9908bf9 MC |
2292 | } |
2293 | ||
2294 | /* | |
2295 | * use the 'p' output buffer for the ECDH key, but make sure to | |
2296 | * clear it out afterwards | |
2297 | */ | |
0f113f3e | 2298 | |
b9908bf9 MC |
2299 | field_size = EC_GROUP_get_degree(srvr_group); |
2300 | if (field_size <= 0) { | |
2301 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); | |
2302 | goto err; | |
0f113f3e | 2303 | } |
b9908bf9 MC |
2304 | pmslen = (field_size + 7) / 8; |
2305 | pms = OPENSSL_malloc(pmslen); | |
2306 | if (!pms) | |
2307 | goto memerr; | |
2308 | n = ECDH_compute_key(pms, pmslen, srvr_ecpoint, clnt_ecdh, NULL); | |
2309 | if (n <= 0 || pmslen != (size_t)n) { | |
2310 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); | |
2311 | goto err; | |
2312 | } | |
2313 | ||
2314 | if (ecdh_clnt_cert) { | |
2315 | /* Send empty client key exch message */ | |
2316 | n = 0; | |
2317 | } else { | |
2318 | /* | |
2319 | * First check the size of encoding and allocate memory | |
2320 | * accordingly. | |
2321 | */ | |
2322 | encoded_pt_len = | |
2323 | EC_POINT_point2oct(srvr_group, | |
2324 | EC_KEY_get0_public_key(clnt_ecdh), | |
2325 | POINT_CONVERSION_UNCOMPRESSED, | |
2326 | NULL, 0, NULL); | |
2327 | ||
2328 | encodedPoint = (unsigned char *) | |
2329 | OPENSSL_malloc(encoded_pt_len * sizeof(unsigned char)); | |
2330 | bn_ctx = BN_CTX_new(); | |
2331 | if ((encodedPoint == NULL) || (bn_ctx == NULL)) { | |
2332 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
0f113f3e MC |
2333 | ERR_R_MALLOC_FAILURE); |
2334 | goto err; | |
2335 | } | |
b9908bf9 MC |
2336 | |
2337 | /* Encode the public key */ | |
2338 | n = EC_POINT_point2oct(srvr_group, | |
2339 | EC_KEY_get0_public_key(clnt_ecdh), | |
2340 | POINT_CONVERSION_UNCOMPRESSED, | |
2341 | encodedPoint, encoded_pt_len, bn_ctx); | |
2342 | ||
2343 | *p = n; /* length of encoded point */ | |
2344 | /* Encoded point will be copied here */ | |
2345 | p += 1; | |
2346 | /* copy the point */ | |
2347 | memcpy(p, encodedPoint, n); | |
2348 | /* increment n to account for length field */ | |
2349 | n += 1; | |
0f113f3e MC |
2350 | } |
2351 | ||
b9908bf9 MC |
2352 | /* Free allocated memory */ |
2353 | BN_CTX_free(bn_ctx); | |
2354 | OPENSSL_free(encodedPoint); | |
2355 | EC_KEY_free(clnt_ecdh); | |
2356 | EVP_PKEY_free(srvr_pub_pkey); | |
2357 | } | |
2358 | #endif /* !OPENSSL_NO_EC */ | |
2359 | else if (alg_k & SSL_kGOST) { | |
2360 | /* GOST key exchange message creation */ | |
2361 | EVP_PKEY_CTX *pkey_ctx; | |
2362 | X509 *peer_cert; | |
2363 | size_t msglen; | |
2364 | unsigned int md_len; | |
2365 | unsigned char shared_ukm[32], tmp[256]; | |
2366 | EVP_MD_CTX *ukm_hash; | |
2367 | EVP_PKEY *pub_key; | |
2368 | ||
2369 | pmslen = 32; | |
2370 | pms = OPENSSL_malloc(pmslen); | |
2371 | if (!pms) | |
2372 | goto memerr; | |
7689082b | 2373 | |
b9908bf9 MC |
2374 | /* |
2375 | * Get server sertificate PKEY and create ctx from it | |
2376 | */ | |
2377 | peer_cert = s->session->peer; | |
2378 | if (!peer_cert) { | |
2379 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2380 | SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); | |
77d514c5 MC |
2381 | goto err; |
2382 | } | |
2383 | ||
b9908bf9 MC |
2384 | pkey_ctx = EVP_PKEY_CTX_new(pub_key = |
2385 | X509_get_pubkey(peer_cert), NULL); | |
2386 | /* | |
2387 | * If we have send a certificate, and certificate key | |
2388 | * | |
2389 | * * parameters match those of server certificate, use | |
2390 | * certificate key for key exchange | |
2391 | */ | |
0f113f3e | 2392 | |
b9908bf9 MC |
2393 | /* Otherwise, generate ephemeral key pair */ |
2394 | ||
2395 | EVP_PKEY_encrypt_init(pkey_ctx); | |
2396 | /* Generate session key */ | |
2397 | if (RAND_bytes(pms, pmslen) <= 0) { | |
2398 | EVP_PKEY_CTX_free(pkey_ctx); | |
2399 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2400 | ERR_R_INTERNAL_ERROR); | |
2401 | goto err; | |
2402 | }; | |
c660ec63 | 2403 | /* |
b9908bf9 | 2404 | * If we have client certificate, use its secret as peer key |
c660ec63 | 2405 | */ |
b9908bf9 MC |
2406 | if (s->s3->tmp.cert_req && s->cert->key->privatekey) { |
2407 | if (EVP_PKEY_derive_set_peer | |
2408 | (pkey_ctx, s->cert->key->privatekey) <= 0) { | |
2409 | /* | |
2410 | * If there was an error - just ignore it. Ephemeral key | |
2411 | * * would be used | |
2412 | */ | |
2413 | ERR_clear_error(); | |
c660ec63 DSH |
2414 | } |
2415 | } | |
b9908bf9 MC |
2416 | /* |
2417 | * Compute shared IV and store it in algorithm-specific context | |
2418 | * data | |
2419 | */ | |
2420 | ukm_hash = EVP_MD_CTX_create(); | |
2421 | EVP_DigestInit(ukm_hash, | |
2422 | EVP_get_digestbynid(NID_id_GostR3411_94)); | |
2423 | EVP_DigestUpdate(ukm_hash, s->s3->client_random, | |
2424 | SSL3_RANDOM_SIZE); | |
2425 | EVP_DigestUpdate(ukm_hash, s->s3->server_random, | |
2426 | SSL3_RANDOM_SIZE); | |
2427 | EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); | |
2428 | EVP_MD_CTX_destroy(ukm_hash); | |
2429 | if (EVP_PKEY_CTX_ctrl | |
2430 | (pkey_ctx, -1, EVP_PKEY_OP_ENCRYPT, EVP_PKEY_CTRL_SET_IV, 8, | |
2431 | shared_ukm) < 0) { | |
2432 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2433 | SSL_R_LIBRARY_BUG); | |
2434 | goto err; | |
c660ec63 | 2435 | } |
b9908bf9 MC |
2436 | /* Make GOST keytransport blob message */ |
2437 | /* | |
2438 | * Encapsulate it into sequence | |
2439 | */ | |
2440 | *(p++) = V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; | |
2441 | msglen = 255; | |
2442 | if (EVP_PKEY_encrypt(pkey_ctx, tmp, &msglen, pms, pmslen) < 0) { | |
2443 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2444 | SSL_R_LIBRARY_BUG); | |
c660ec63 DSH |
2445 | goto err; |
2446 | } | |
b9908bf9 MC |
2447 | if (msglen >= 0x80) { |
2448 | *(p++) = 0x81; | |
2449 | *(p++) = msglen & 0xff; | |
2450 | n = msglen + 3; | |
2451 | } else { | |
2452 | *(p++) = msglen & 0xff; | |
2453 | n = msglen + 2; | |
2454 | } | |
2455 | memcpy(p, tmp, msglen); | |
2456 | /* Check if pubkey from client certificate was used */ | |
2457 | if (EVP_PKEY_CTX_ctrl | |
2458 | (pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) { | |
2459 | /* Set flag "skip certificate verify" */ | |
2460 | s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; | |
2461 | } | |
2462 | EVP_PKEY_CTX_free(pkey_ctx); | |
2463 | EVP_PKEY_free(pub_key); | |
2464 | ||
2465 | } | |
2466 | #ifndef OPENSSL_NO_SRP | |
2467 | else if (alg_k & SSL_kSRP) { | |
2468 | if (s->srp_ctx.A != NULL) { | |
2469 | /* send off the data */ | |
2470 | n = BN_num_bytes(s->srp_ctx.A); | |
2471 | s2n(n, p); | |
2472 | BN_bn2bin(s->srp_ctx.A, p); | |
2473 | n += 2; | |
2474 | } else { | |
2475 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2476 | ERR_R_INTERNAL_ERROR); | |
2477 | goto err; | |
2478 | } | |
2479 | OPENSSL_free(s->session->srp_username); | |
2480 | s->session->srp_username = BUF_strdup(s->srp_ctx.login); | |
2481 | if (s->session->srp_username == NULL) { | |
2482 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, | |
2483 | ERR_R_MALLOC_FAILURE); | |
69f68237 MC |
2484 | goto err; |
2485 | } | |
c660ec63 | 2486 | } |
b9908bf9 MC |
2487 | #endif |
2488 | else { | |
2489 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2490 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2491 | goto err; | |
2492 | } | |
2493 | ||
2494 | #ifndef OPENSSL_NO_PSK | |
2495 | n += pskhdrlen; | |
2496 | #endif | |
2497 | ||
2498 | if (!ssl_set_handshake_header(s, SSL3_MT_CLIENT_KEY_EXCHANGE, n)) { | |
2499 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); | |
2500 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
2501 | goto err; | |
2502 | } | |
2503 | ||
2504 | s->s3->tmp.pms = pms; | |
2505 | s->s3->tmp.pmslen = pmslen; | |
2506 | ||
2507 | return 1; | |
c660ec63 DSH |
2508 | memerr: |
2509 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2510 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); |
0f113f3e | 2511 | err: |
4b45c6e5 | 2512 | OPENSSL_clear_free(pms, pmslen); |
76106e60 | 2513 | s->s3->tmp.pms = NULL; |
10bf4fc2 | 2514 | #ifndef OPENSSL_NO_EC |
0f113f3e | 2515 | BN_CTX_free(bn_ctx); |
b548a1f1 | 2516 | OPENSSL_free(encodedPoint); |
8fdc3734 | 2517 | EC_KEY_free(clnt_ecdh); |
0f113f3e | 2518 | EVP_PKEY_free(srvr_pub_pkey); |
7689082b DSH |
2519 | #endif |
2520 | #ifndef OPENSSL_NO_PSK | |
2521 | OPENSSL_clear_free(s->s3->tmp.psk, s->s3->tmp.psklen); | |
2522 | s->s3->tmp.psk = NULL; | |
0f113f3e | 2523 | #endif |
b9908bf9 MC |
2524 | statem_set_error(s); |
2525 | return 0; | |
2526 | } | |
2527 | ||
2528 | int tls_client_key_exchange_post_work(SSL *s) | |
2529 | { | |
2530 | unsigned char *pms = NULL; | |
2531 | size_t pmslen = 0; | |
2532 | ||
2533 | #ifndef OPENSSL_NO_SRP | |
2534 | /* Check for SRP */ | |
2535 | if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) { | |
2536 | if (!srp_generate_client_master_secret(s)) { | |
2537 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, | |
2538 | ERR_R_INTERNAL_ERROR); | |
2539 | goto err; | |
2540 | } | |
2541 | return 1; | |
2542 | } | |
2543 | #endif | |
2544 | pms = s->s3->tmp.pms; | |
2545 | pmslen = s->s3->tmp.pmslen; | |
2546 | ||
2547 | if (pms == NULL && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) { | |
2548 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2549 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_MALLOC_FAILURE); | |
2550 | goto err; | |
2551 | } | |
2552 | if (!ssl_generate_master_secret(s, pms, pmslen, 1)) { | |
2553 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2554 | SSLerr(SSL_F_TLS_CLIENT_KEY_EXCHANGE_POST_WORK, ERR_R_INTERNAL_ERROR); | |
2555 | goto err; | |
2556 | } | |
2557 | return 1; | |
2558 | err: | |
2559 | OPENSSL_clear_free(pms, pmslen); | |
2560 | s->s3->tmp.pms = NULL; | |
2561 | return 0; | |
0f113f3e | 2562 | } |
d02b48c6 | 2563 | |
36d16f8e | 2564 | int ssl3_send_client_verify(SSL *s) |
b9908bf9 MC |
2565 | { |
2566 | if (s->state == SSL3_ST_CW_CERT_VRFY_A) { | |
2567 | if(tls_construct_client_verify(s) == 0) | |
2568 | goto err; | |
2569 | ||
2570 | s->state = SSL3_ST_CW_CERT_VRFY_B; | |
2571 | } | |
2572 | ||
2573 | /* SSL3_ST_CW_CERT_VRFY_B */ | |
2574 | return ssl_do_write(s); | |
2575 | err: | |
2576 | s->state = SSL_ST_ERR; | |
2577 | return -1; | |
2578 | ||
2579 | } | |
2580 | ||
2581 | int tls_construct_client_verify(SSL *s) | |
0f113f3e MC |
2582 | { |
2583 | unsigned char *p; | |
2584 | unsigned char data[MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH]; | |
2585 | EVP_PKEY *pkey; | |
2586 | EVP_PKEY_CTX *pctx = NULL; | |
2587 | EVP_MD_CTX mctx; | |
2588 | unsigned u = 0; | |
2589 | unsigned long n; | |
2590 | int j; | |
2591 | ||
2592 | EVP_MD_CTX_init(&mctx); | |
2593 | ||
b9908bf9 MC |
2594 | p = ssl_handshake_start(s); |
2595 | pkey = s->cert->key->privatekey; | |
0e1dba93 | 2596 | /* Create context from key and test if sha1 is allowed as digest */ |
b9908bf9 MC |
2597 | pctx = EVP_PKEY_CTX_new(pkey, NULL); |
2598 | EVP_PKEY_sign_init(pctx); | |
2599 | if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1()) > 0) { | |
2600 | if (!SSL_USE_SIGALGS(s)) | |
2601 | s->method->ssl3_enc->cert_verify_mac(s, | |
2602 | NID_sha1, | |
2603 | &(data | |
2604 | [MD5_DIGEST_LENGTH])); | |
2605 | } else { | |
2606 | ERR_clear_error(); | |
2607 | } | |
2608 | /* | |
2609 | * For TLS v1.2 send signature algorithm and signature using agreed | |
2610 | * digest and cached handshake records. | |
2611 | */ | |
2612 | if (SSL_USE_SIGALGS(s)) { | |
2613 | long hdatalen = 0; | |
2614 | void *hdata; | |
2615 | const EVP_MD *md = s->s3->tmp.md[s->cert->key - s->cert->pkeys]; | |
2616 | hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); | |
2617 | if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) { | |
2618 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); | |
2619 | goto err; | |
0f113f3e | 2620 | } |
b9908bf9 | 2621 | p += 2; |
855a54a9 | 2622 | #ifdef SSL_DEBUG |
b9908bf9 MC |
2623 | fprintf(stderr, "Using TLS 1.2 with client alg %s\n", |
2624 | EVP_MD_name(md)); | |
0f113f3e | 2625 | #endif |
b9908bf9 MC |
2626 | if (!EVP_SignInit_ex(&mctx, md, NULL) |
2627 | || !EVP_SignUpdate(&mctx, hdata, hdatalen) | |
2628 | || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) { | |
2629 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_EVP_LIB); | |
2630 | goto err; | |
2631 | } | |
2632 | s2n(u, p); | |
2633 | n = u + 4; | |
2634 | /* Digest cached records and discard handshake buffer */ | |
2635 | if (!ssl3_digest_cached_records(s, 0)) | |
2636 | goto err; | |
2637 | } else | |
bc36ee62 | 2638 | #ifndef OPENSSL_NO_RSA |
b9908bf9 MC |
2639 | if (pkey->type == EVP_PKEY_RSA) { |
2640 | s->method->ssl3_enc->cert_verify_mac(s, NID_md5, &(data[0])); | |
2641 | if (RSA_sign(NID_md5_sha1, data, | |
2642 | MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH, | |
2643 | &(p[2]), &u, pkey->pkey.rsa) <= 0) { | |
2644 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_RSA_LIB); | |
2645 | goto err; | |
2646 | } | |
2647 | s2n(u, p); | |
2648 | n = u + 2; | |
2649 | } else | |
d02b48c6 | 2650 | #endif |
bc36ee62 | 2651 | #ifndef OPENSSL_NO_DSA |
b9908bf9 MC |
2652 | if (pkey->type == EVP_PKEY_DSA) { |
2653 | if (!DSA_sign(pkey->save_type, | |
2654 | &(data[MD5_DIGEST_LENGTH]), | |
2655 | SHA_DIGEST_LENGTH, &(p[2]), | |
2656 | (unsigned int *)&j, pkey->pkey.dsa)) { | |
2657 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_DSA_LIB); | |
2658 | goto err; | |
2659 | } | |
2660 | s2n(j, p); | |
2661 | n = j + 2; | |
2662 | } else | |
ea262260 | 2663 | #endif |
10bf4fc2 | 2664 | #ifndef OPENSSL_NO_EC |
b9908bf9 MC |
2665 | if (pkey->type == EVP_PKEY_EC) { |
2666 | if (!ECDSA_sign(pkey->save_type, | |
2667 | &(data[MD5_DIGEST_LENGTH]), | |
2668 | SHA_DIGEST_LENGTH, &(p[2]), | |
2669 | (unsigned int *)&j, pkey->pkey.ec)) { | |
2670 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_ECDSA_LIB); | |
0f113f3e MC |
2671 | goto err; |
2672 | } | |
b9908bf9 MC |
2673 | s2n(j, p); |
2674 | n = j + 2; | |
2675 | } else | |
2676 | #endif | |
2677 | if (pkey->type == NID_id_GostR3410_2001) { | |
2678 | unsigned char signbuf[64]; | |
2679 | int i; | |
2680 | size_t sigsize = 64; | |
2681 | s->method->ssl3_enc->cert_verify_mac(s, | |
2682 | NID_id_GostR3411_94, data); | |
2683 | if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { | |
2684 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); | |
77d514c5 MC |
2685 | goto err; |
2686 | } | |
b9908bf9 MC |
2687 | for (i = 63, j = 0; i >= 0; j++, i--) { |
2688 | p[2 + j] = signbuf[i]; | |
2689 | } | |
2690 | s2n(j, p); | |
2691 | n = j + 2; | |
2692 | } else { | |
2693 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); | |
2694 | goto err; | |
2695 | } | |
2696 | if (!ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_VERIFY, n)) { | |
2697 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_VERIFY, ERR_R_INTERNAL_ERROR); | |
2698 | goto err; | |
0f113f3e | 2699 | } |
b9908bf9 | 2700 | |
0f113f3e MC |
2701 | EVP_MD_CTX_cleanup(&mctx); |
2702 | EVP_PKEY_CTX_free(pctx); | |
b9908bf9 | 2703 | return 1; |
0f113f3e MC |
2704 | err: |
2705 | EVP_MD_CTX_cleanup(&mctx); | |
2706 | EVP_PKEY_CTX_free(pctx); | |
b9908bf9 | 2707 | return 0; |
0f113f3e MC |
2708 | } |
2709 | ||
2710 | /* | |
2711 | * Check a certificate can be used for client authentication. Currently check | |
2712 | * cert exists, if we have a suitable digest for TLS 1.2 if static DH client | |
2713 | * certificates can be used and optionally checks suitability for Suite B. | |
0d609395 DSH |
2714 | */ |
2715 | static int ssl3_check_client_certificate(SSL *s) | |
0f113f3e MC |
2716 | { |
2717 | unsigned long alg_k; | |
2718 | if (!s->cert || !s->cert->key->x509 || !s->cert->key->privatekey) | |
2719 | return 0; | |
2720 | /* If no suitable signature algorithm can't use certificate */ | |
d376e57d | 2721 | if (SSL_USE_SIGALGS(s) && !s->s3->tmp.md[s->cert->key - s->cert->pkeys]) |
0f113f3e MC |
2722 | return 0; |
2723 | /* | |
2724 | * If strict mode check suitability of chain before using it. This also | |
2725 | * adjusts suite B digest if necessary. | |
2726 | */ | |
2727 | if (s->cert->cert_flags & SSL_CERT_FLAGS_CHECK_TLS_STRICT && | |
2728 | !tls1_check_chain(s, NULL, NULL, NULL, -2)) | |
2729 | return 0; | |
2730 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; | |
2731 | /* See if we can use client certificate for fixed DH */ | |
2732 | if (alg_k & (SSL_kDHr | SSL_kDHd)) { | |
a273c6ee | 2733 | int i = s->session->peer_type; |
0f113f3e MC |
2734 | EVP_PKEY *clkey = NULL, *spkey = NULL; |
2735 | clkey = s->cert->key->privatekey; | |
2736 | /* If client key not DH assume it can be used */ | |
2737 | if (EVP_PKEY_id(clkey) != EVP_PKEY_DH) | |
2738 | return 1; | |
2739 | if (i >= 0) | |
a273c6ee | 2740 | spkey = X509_get_pubkey(s->session->peer); |
0f113f3e MC |
2741 | if (spkey) { |
2742 | /* Compare server and client parameters */ | |
2743 | i = EVP_PKEY_cmp_parameters(clkey, spkey); | |
2744 | EVP_PKEY_free(spkey); | |
2745 | if (i != 1) | |
2746 | return 0; | |
2747 | } | |
2748 | s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; | |
2749 | } | |
2750 | return 1; | |
2751 | } | |
0d609395 | 2752 | |
b9908bf9 | 2753 | |
36d16f8e | 2754 | int ssl3_send_client_certificate(SSL *s) |
b9908bf9 MC |
2755 | { |
2756 | enum WORK_STATE wst; | |
2757 | ||
2758 | if (s->state == SSL3_ST_CW_CERT_A || s->state == SSL3_ST_CW_CERT_B) { | |
2759 | if (s->state == SSL3_ST_CW_CERT_A) | |
2760 | wst = tls_prepare_client_certificate(s, WORK_MORE_A); | |
2761 | else | |
2762 | wst = tls_prepare_client_certificate(s, WORK_MORE_B); | |
2763 | if (wst == WORK_ERROR) | |
2764 | goto err; | |
2765 | if (wst == WORK_MORE_A) | |
2766 | return -1; | |
2767 | if (wst == WORK_MORE_B) { | |
2768 | s->state = SSL3_ST_CW_CERT_B; | |
2769 | return -1; | |
2770 | } | |
2771 | ||
2772 | s->state = SSL3_ST_CW_CERT_C; | |
2773 | } | |
2774 | ||
2775 | if (s->state == SSL3_ST_CW_CERT_B) { | |
2776 | wst = tls_prepare_client_certificate(s, WORK_MORE_B); | |
2777 | if (wst == WORK_ERROR) | |
2778 | goto err; | |
2779 | if (wst == WORK_MORE_A) | |
2780 | return -1; | |
2781 | ||
2782 | /* Skip state C...it was entirely temporary in the original code */ | |
2783 | s->state = SSL3_ST_CW_CERT_D; | |
2784 | } | |
2785 | ||
2786 | if (tls_construct_client_certificate(s) == 0) | |
2787 | goto err; | |
2788 | ||
2789 | return ssl_do_write(s); | |
2790 | err: | |
2791 | s->state = SSL_ST_ERR; | |
2792 | return -1; | |
2793 | ||
2794 | } | |
2795 | ||
2796 | enum WORK_STATE tls_prepare_client_certificate(SSL *s, enum WORK_STATE wst) | |
0f113f3e MC |
2797 | { |
2798 | X509 *x509 = NULL; | |
2799 | EVP_PKEY *pkey = NULL; | |
2800 | int i; | |
2801 | ||
b9908bf9 | 2802 | if (wst == WORK_MORE_A) { |
0f113f3e MC |
2803 | /* Let cert callback update client certificates if required */ |
2804 | if (s->cert->cert_cb) { | |
2805 | i = s->cert->cert_cb(s, s->cert->cert_cb_arg); | |
2806 | if (i < 0) { | |
2807 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 2808 | return WORK_MORE_A; |
0f113f3e MC |
2809 | } |
2810 | if (i == 0) { | |
2811 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
b9908bf9 | 2812 | statem_set_error(s); |
0f113f3e MC |
2813 | return 0; |
2814 | } | |
2815 | s->rwstate = SSL_NOTHING; | |
2816 | } | |
2817 | if (ssl3_check_client_certificate(s)) | |
b9908bf9 MC |
2818 | return WORK_FINISHED_CONTINUE; |
2819 | ||
2820 | /* Fall through to WORK_MORE_B */ | |
2821 | wst = WORK_MORE_B; | |
0f113f3e MC |
2822 | } |
2823 | ||
2824 | /* We need to get a client cert */ | |
b9908bf9 | 2825 | if (wst == WORK_MORE_B) { |
0f113f3e MC |
2826 | /* |
2827 | * If we get an error, we need to ssl->rwstate=SSL_X509_LOOKUP; | |
2828 | * return(-1); We then get retied later | |
2829 | */ | |
0f113f3e MC |
2830 | i = ssl_do_client_cert_cb(s, &x509, &pkey); |
2831 | if (i < 0) { | |
2832 | s->rwstate = SSL_X509_LOOKUP; | |
b9908bf9 | 2833 | return WORK_MORE_B; |
0f113f3e MC |
2834 | } |
2835 | s->rwstate = SSL_NOTHING; | |
2836 | if ((i == 1) && (pkey != NULL) && (x509 != NULL)) { | |
0f113f3e MC |
2837 | if (!SSL_use_certificate(s, x509) || !SSL_use_PrivateKey(s, pkey)) |
2838 | i = 0; | |
2839 | } else if (i == 1) { | |
2840 | i = 0; | |
b9908bf9 | 2841 | SSLerr(SSL_F_TLS_PREPARE_CLIENT_CERTIFICATE, |
0f113f3e MC |
2842 | SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); |
2843 | } | |
2844 | ||
222561fe | 2845 | X509_free(x509); |
25aaa98a | 2846 | EVP_PKEY_free(pkey); |
0f113f3e MC |
2847 | if (i && !ssl3_check_client_certificate(s)) |
2848 | i = 0; | |
2849 | if (i == 0) { | |
2850 | if (s->version == SSL3_VERSION) { | |
2851 | s->s3->tmp.cert_req = 0; | |
2852 | ssl3_send_alert(s, SSL3_AL_WARNING, SSL_AD_NO_CERTIFICATE); | |
b9908bf9 | 2853 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
2854 | } else { |
2855 | s->s3->tmp.cert_req = 2; | |
124037fd | 2856 | if (!ssl3_digest_cached_records(s, 0)) { |
dab18ab5 | 2857 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); |
b9908bf9 | 2858 | statem_set_error(s); |
dab18ab5 DSH |
2859 | return 0; |
2860 | } | |
0f113f3e MC |
2861 | } |
2862 | } | |
2863 | ||
b9908bf9 | 2864 | return WORK_FINISHED_CONTINUE; |
0f113f3e MC |
2865 | } |
2866 | ||
b9908bf9 MC |
2867 | /* Shouldn't ever get here */ |
2868 | return WORK_ERROR; | |
2869 | } | |
2870 | ||
2871 | int tls_construct_client_certificate(SSL *s) | |
2872 | { | |
2873 | if (!ssl3_output_cert_chain(s, | |
2874 | (s->s3->tmp.cert_req == | |
2875 | 2) ? NULL : s->cert->key)) { | |
2876 | SSLerr(SSL_F_TLS_CONSTRUCT_CLIENT_CERTIFICATE, ERR_R_INTERNAL_ERROR); | |
2877 | ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_INTERNAL_ERROR); | |
2878 | statem_set_error(s); | |
2879 | return 0; | |
0f113f3e | 2880 | } |
b9908bf9 MC |
2881 | |
2882 | return 1; | |
0f113f3e MC |
2883 | } |
2884 | ||
2885 | #define has_bits(i,m) (((i)&(m)) == (m)) | |
d02b48c6 | 2886 | |
36d16f8e | 2887 | int ssl3_check_cert_and_algorithm(SSL *s) |
0f113f3e MC |
2888 | { |
2889 | int i, idx; | |
2890 | long alg_k, alg_a; | |
2891 | EVP_PKEY *pkey = NULL; | |
ac38115c | 2892 | int pkey_bits; |
bc36ee62 | 2893 | #ifndef OPENSSL_NO_RSA |
0f113f3e | 2894 | RSA *rsa; |
79df9d62 | 2895 | #endif |
bc36ee62 | 2896 | #ifndef OPENSSL_NO_DH |
0f113f3e | 2897 | DH *dh; |
79df9d62 | 2898 | #endif |
26c79d56 | 2899 | int al = SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 | 2900 | |
0f113f3e MC |
2901 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
2902 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; | |
d02b48c6 | 2903 | |
0f113f3e | 2904 | /* we don't have a certificate */ |
55a9a16f | 2905 | if ((alg_a & SSL_aNULL) || (alg_k & SSL_kPSK)) |
0f113f3e | 2906 | return (1); |
bc36ee62 | 2907 | #ifndef OPENSSL_NO_RSA |
8d92c1f8 | 2908 | rsa = s->s3->peer_rsa_tmp; |
79df9d62 | 2909 | #endif |
bc36ee62 | 2910 | #ifndef OPENSSL_NO_DH |
8d92c1f8 | 2911 | dh = s->s3->peer_dh_tmp; |
79df9d62 | 2912 | #endif |
d02b48c6 | 2913 | |
0f113f3e | 2914 | /* This is the passed certificate */ |
d02b48c6 | 2915 | |
a273c6ee | 2916 | idx = s->session->peer_type; |
10bf4fc2 | 2917 | #ifndef OPENSSL_NO_EC |
0f113f3e | 2918 | if (idx == SSL_PKEY_ECC) { |
a273c6ee | 2919 | if (ssl_check_srvr_ecc_cert_and_alg(s->session->peer, s) == 0) { |
0f113f3e MC |
2920 | /* check failed */ |
2921 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_BAD_ECC_CERT); | |
2922 | goto f_err; | |
2923 | } else { | |
2924 | return 1; | |
2925 | } | |
2926 | } else if (alg_a & SSL_aECDSA) { | |
2927 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
2928 | SSL_R_MISSING_ECDSA_SIGNING_CERT); | |
2929 | goto f_err; | |
2930 | } else if (alg_k & (SSL_kECDHr | SSL_kECDHe)) { | |
2931 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, SSL_R_MISSING_ECDH_CERT); | |
2932 | goto f_err; | |
2933 | } | |
2934 | #endif | |
a273c6ee | 2935 | pkey = X509_get_pubkey(s->session->peer); |
ac38115c | 2936 | pkey_bits = EVP_PKEY_bits(pkey); |
a273c6ee | 2937 | i = X509_certificate_type(s->session->peer, pkey); |
0f113f3e MC |
2938 | EVP_PKEY_free(pkey); |
2939 | ||
2940 | /* Check that we have a certificate if we require one */ | |
2941 | if ((alg_a & SSL_aRSA) && !has_bits(i, EVP_PK_RSA | EVP_PKT_SIGN)) { | |
2942 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
2943 | SSL_R_MISSING_RSA_SIGNING_CERT); | |
2944 | goto f_err; | |
2945 | } | |
bc36ee62 | 2946 | #ifndef OPENSSL_NO_DSA |
0f113f3e MC |
2947 | else if ((alg_a & SSL_aDSS) && !has_bits(i, EVP_PK_DSA | EVP_PKT_SIGN)) { |
2948 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
2949 | SSL_R_MISSING_DSA_SIGNING_CERT); | |
2950 | goto f_err; | |
2951 | } | |
d02b48c6 | 2952 | #endif |
bc36ee62 | 2953 | #ifndef OPENSSL_NO_RSA |
7689082b | 2954 | if (alg_k & (SSL_kRSA | SSL_kRSAPSK)) { |
26c79d56 KR |
2955 | if (!SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && |
2956 | !has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
2957 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
2958 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
2959 | goto f_err; | |
2960 | } else if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher)) { | |
2961 | if (pkey_bits <= SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { | |
2962 | if (!has_bits(i, EVP_PK_RSA | EVP_PKT_ENC)) { | |
2963 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
2964 | SSL_R_MISSING_RSA_ENCRYPTING_CERT); | |
2965 | goto f_err; | |
2966 | } | |
2967 | if (rsa != NULL) { | |
2968 | /* server key exchange is not allowed. */ | |
2969 | al = SSL_AD_INTERNAL_ERROR; | |
2970 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
2971 | goto f_err; | |
2972 | } | |
2973 | } | |
2974 | } | |
0f113f3e | 2975 | } |
79df9d62 | 2976 | #endif |
bc36ee62 | 2977 | #ifndef OPENSSL_NO_DH |
26c79d56 KR |
2978 | if ((alg_k & SSL_kDHE) && (dh == NULL)) { |
2979 | al = SSL_AD_INTERNAL_ERROR; | |
2980 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, ERR_R_INTERNAL_ERROR); | |
0f113f3e MC |
2981 | goto f_err; |
2982 | } else if ((alg_k & SSL_kDHr) && !SSL_USE_SIGALGS(s) && | |
2983 | !has_bits(i, EVP_PK_DH | EVP_PKS_RSA)) { | |
2984 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
2985 | SSL_R_MISSING_DH_RSA_CERT); | |
2986 | goto f_err; | |
2987 | } | |
2988 | # ifndef OPENSSL_NO_DSA | |
2989 | else if ((alg_k & SSL_kDHd) && !SSL_USE_SIGALGS(s) && | |
2990 | !has_bits(i, EVP_PK_DH | EVP_PKS_DSA)) { | |
2991 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
2992 | SSL_R_MISSING_DH_DSA_CERT); | |
2993 | goto f_err; | |
2994 | } | |
2995 | # endif | |
d02b48c6 RE |
2996 | #endif |
2997 | ||
ac38115c KR |
2998 | if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && |
2999 | pkey_bits > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { | |
bc36ee62 | 3000 | #ifndef OPENSSL_NO_RSA |
0f113f3e | 3001 | if (alg_k & SSL_kRSA) { |
26c79d56 KR |
3002 | if (rsa == NULL) { |
3003 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3004 | SSL_R_MISSING_EXPORT_TMP_RSA_KEY); | |
3005 | goto f_err; | |
3006 | } else if (RSA_bits(rsa) > | |
0f113f3e | 3007 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { |
26c79d56 KR |
3008 | /* We have a temporary RSA key but it's too large. */ |
3009 | al = SSL_AD_EXPORT_RESTRICTION; | |
0f113f3e MC |
3010 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, |
3011 | SSL_R_MISSING_EXPORT_TMP_RSA_KEY); | |
3012 | goto f_err; | |
3013 | } | |
3014 | } else | |
d02b48c6 | 3015 | #endif |
bc36ee62 | 3016 | #ifndef OPENSSL_NO_DH |
26c79d56 KR |
3017 | if (alg_k & SSL_kDHE) { |
3018 | if (DH_bits(dh) > | |
0f113f3e | 3019 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) { |
26c79d56 KR |
3020 | /* We have a temporary DH key but it's too large. */ |
3021 | al = SSL_AD_EXPORT_RESTRICTION; | |
0f113f3e MC |
3022 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, |
3023 | SSL_R_MISSING_EXPORT_TMP_DH_KEY); | |
3024 | goto f_err; | |
3025 | } | |
26c79d56 KR |
3026 | } else if (alg_k & (SSL_kDHr | SSL_kDHd)) { |
3027 | /* The cert should have had an export DH key. */ | |
3028 | al = SSL_AD_EXPORT_RESTRICTION; | |
3029 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3030 | SSL_R_MISSING_EXPORT_TMP_DH_KEY); | |
3031 | goto f_err; | |
0f113f3e MC |
3032 | } else |
3033 | #endif | |
3034 | { | |
3035 | SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM, | |
3036 | SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); | |
3037 | goto f_err; | |
3038 | } | |
3039 | } | |
3040 | return (1); | |
3041 | f_err: | |
26c79d56 | 3042 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
0f113f3e MC |
3043 | return (0); |
3044 | } | |
3045 | ||
e481f9b9 | 3046 | #ifndef OPENSSL_NO_NEXTPROTONEG |
ee2ffc27 | 3047 | int ssl3_send_next_proto(SSL *s) |
0f113f3e | 3048 | { |
0f113f3e | 3049 | if (s->state == SSL3_ST_CW_NEXT_PROTO_A) { |
b9908bf9 MC |
3050 | if (tls_construct_next_proto(s) == 0) { |
3051 | s->state = SSL_ST_ERR; | |
3052 | return -1; | |
3053 | } | |
0f113f3e | 3054 | s->state = SSL3_ST_CW_NEXT_PROTO_B; |
0f113f3e MC |
3055 | } |
3056 | ||
3057 | return ssl3_do_write(s, SSL3_RT_HANDSHAKE); | |
3058 | } | |
b9908bf9 MC |
3059 | |
3060 | int tls_construct_next_proto(SSL *s) | |
3061 | { | |
3062 | unsigned int len, padding_len; | |
3063 | unsigned char *d; | |
3064 | ||
3065 | len = s->next_proto_negotiated_len; | |
3066 | padding_len = 32 - ((len + 2) % 32); | |
3067 | d = (unsigned char *)s->init_buf->data; | |
3068 | d[4] = len; | |
3069 | memcpy(d + 5, s->next_proto_negotiated, len); | |
3070 | d[5 + len] = padding_len; | |
3071 | memset(d + 6 + len, 0, padding_len); | |
3072 | *(d++) = SSL3_MT_NEXT_PROTO; | |
3073 | l2n3(2 + len + padding_len, d); | |
3074 | s->init_num = 4 + 2 + len + padding_len; | |
3075 | s->init_off = 0; | |
3076 | ||
3077 | return 1; | |
3078 | } | |
6434abbf | 3079 | #endif |
368888bc DSH |
3080 | |
3081 | int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) | |
0f113f3e MC |
3082 | { |
3083 | int i = 0; | |
368888bc | 3084 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
3085 | if (s->ctx->client_cert_engine) { |
3086 | i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, | |
3087 | SSL_get_client_CA_list(s), | |
3088 | px509, ppkey, NULL, NULL, NULL); | |
3089 | if (i != 0) | |
3090 | return i; | |
3091 | } | |
3092 | #endif | |
3093 | if (s->ctx->client_cert_cb) | |
3094 | i = s->ctx->client_cert_cb(s, px509, ppkey); | |
3095 | return i; | |
3096 | } | |
d45ba43d MC |
3097 | |
3098 | int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, | |
e9fa092e | 3099 | unsigned char *p) |
d45ba43d MC |
3100 | { |
3101 | int i, j = 0; | |
3102 | SSL_CIPHER *c; | |
3103 | unsigned char *q; | |
3104 | int empty_reneg_info_scsv = !s->renegotiate; | |
3105 | /* Set disabled masks for this session */ | |
3106 | ssl_set_client_disabled(s); | |
3107 | ||
3108 | if (sk == NULL) | |
3109 | return (0); | |
3110 | q = p; | |
d45ba43d MC |
3111 | |
3112 | for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { | |
3113 | c = sk_SSL_CIPHER_value(sk, i); | |
3114 | /* Skip disabled ciphers */ | |
3115 | if (ssl_cipher_disabled(s, c, SSL_SECOP_CIPHER_SUPPORTED)) | |
3116 | continue; | |
3117 | #ifdef OPENSSL_SSL_DEBUG_BROKEN_PROTOCOL | |
3118 | if (c->id == SSL3_CK_SCSV) { | |
3119 | if (!empty_reneg_info_scsv) | |
3120 | continue; | |
3121 | else | |
3122 | empty_reneg_info_scsv = 0; | |
3123 | } | |
3124 | #endif | |
e9fa092e | 3125 | j = s->method->put_cipher_by_char(c, p); |
d45ba43d MC |
3126 | p += j; |
3127 | } | |
3128 | /* | |
3129 | * If p == q, no ciphers; caller indicates an error. Otherwise, add | |
3130 | * applicable SCSVs. | |
3131 | */ | |
3132 | if (p != q) { | |
3133 | if (empty_reneg_info_scsv) { | |
3134 | static SSL_CIPHER scsv = { | |
3135 | 0, NULL, SSL3_CK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3136 | }; | |
e9fa092e | 3137 | j = s->method->put_cipher_by_char(&scsv, p); |
d45ba43d MC |
3138 | p += j; |
3139 | #ifdef OPENSSL_RI_DEBUG | |
3140 | fprintf(stderr, | |
3141 | "TLS_EMPTY_RENEGOTIATION_INFO_SCSV sent by client\n"); | |
3142 | #endif | |
3143 | } | |
3144 | if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { | |
3145 | static SSL_CIPHER scsv = { | |
3146 | 0, NULL, SSL3_CK_FALLBACK_SCSV, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
3147 | }; | |
e9fa092e | 3148 | j = s->method->put_cipher_by_char(&scsv, p); |
d45ba43d MC |
3149 | p += j; |
3150 | } | |
3151 | } | |
3152 | ||
3153 | return (p - q); | |
3154 | } |