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cbb92dfa | 1 | /* ssl/s3_srvr.c -*- mode:C; c-file-style: "eay" -*- */ |
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. | |
8 | * | |
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). | |
15 | * | |
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. | |
22 | * | |
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 :-). | |
37 | * 4. If you include any Windows specific code (or a derivative thereof) from | |
38 | * the apps directory (application code) you must include an acknowledgement: | |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40 | * | |
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. | |
52 | * | |
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 | */ | |
8e2f6b79 | 58 | /* ==================================================================== |
52b8dad8 | 59 | * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. |
8e2f6b79 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 | |
66 | * notice, this list of conditions and the following disclaimer. | |
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 | * | |
114 | * Portions of the attached software ("Contribution") are developed by | |
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 | #define REUSE_CIPHER_BUG | |
de469ef2 DSH |
152 | #define NETSCAPE_HANG_BUG |
153 | ||
d02b48c6 | 154 | #include <stdio.h> |
7b63c0fa LJ |
155 | #include "ssl_locl.h" |
156 | #include "kssl_lcl.h" | |
455b65df | 157 | #include "../crypto/constant_time_locl.h" |
ec577822 BM |
158 | #include <openssl/buffer.h> |
159 | #include <openssl/rand.h> | |
160 | #include <openssl/objects.h> | |
161 | #include <openssl/evp.h> | |
6434abbf | 162 | #include <openssl/hmac.h> |
ec577822 | 163 | #include <openssl/x509.h> |
3eeaab4b | 164 | #ifndef OPENSSL_NO_DH |
60a938c6 | 165 | #include <openssl/dh.h> |
3eeaab4b | 166 | #endif |
d095b68d | 167 | #include <openssl/bn.h> |
5fdf0666 | 168 | #ifndef OPENSSL_NO_KRB5 |
2a1ef754 | 169 | #include <openssl/krb5_asn.h> |
5fdf0666 | 170 | #endif |
dbad1690 | 171 | #include <openssl/md5.h> |
f9b3bff6 | 172 | |
3881d810 | 173 | #ifndef OPENSSL_NO_SSL3_METHOD |
4ebb342f | 174 | static const SSL_METHOD *ssl3_get_server_method(int ver); |
d02b48c6 | 175 | |
4ebb342f | 176 | static const SSL_METHOD *ssl3_get_server_method(int ver) |
d02b48c6 | 177 | { |
58964a49 | 178 | if (ver == SSL3_VERSION) |
d02b48c6 RE |
179 | return(SSLv3_server_method()); |
180 | else | |
181 | return(NULL); | |
182 | } | |
183 | ||
3881d810 DSH |
184 | IMPLEMENT_ssl3_meth_func(SSLv3_server_method, |
185 | ssl3_accept, | |
186 | ssl_undefined_function, | |
187 | ssl3_get_server_method) | |
188 | #endif | |
189 | ||
edc032b5 | 190 | #ifndef OPENSSL_NO_SRP |
71fa4513 | 191 | static int ssl_check_srp_ext_ClientHello(SSL *s, int *al) |
edc032b5 BL |
192 | { |
193 | int ret = SSL_ERROR_NONE; | |
194 | ||
ebba6c48 | 195 | *al = SSL_AD_UNRECOGNIZED_NAME; |
edc032b5 BL |
196 | |
197 | if ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) && | |
198 | (s->srp_ctx.TLS_ext_srp_username_callback != NULL)) | |
199 | { | |
200 | if(s->srp_ctx.login == NULL) | |
201 | { | |
ebba6c48 DSH |
202 | /* RFC 5054 says SHOULD reject, |
203 | we do so if There is no srp login name */ | |
204 | ret = SSL3_AL_FATAL; | |
205 | *al = SSL_AD_UNKNOWN_PSK_IDENTITY; | |
edc032b5 BL |
206 | } |
207 | else | |
208 | { | |
ebba6c48 | 209 | ret = SSL_srp_server_param_with_username(s,al); |
edc032b5 BL |
210 | } |
211 | } | |
212 | return ret; | |
213 | } | |
214 | #endif | |
215 | ||
6b691a5c | 216 | int ssl3_accept(SSL *s) |
d02b48c6 RE |
217 | { |
218 | BUF_MEM *buf; | |
52b8dad8 | 219 | unsigned long alg_k,Time=(unsigned long)time(NULL); |
45d87a1f | 220 | void (*cb)(const SSL *ssl,int type,int val)=NULL; |
d02b48c6 | 221 | int ret= -1; |
d02b48c6 RE |
222 | int new_state,state,skip=0; |
223 | ||
eb952088 | 224 | RAND_add(&Time,sizeof(Time),0); |
d02b48c6 | 225 | ERR_clear_error(); |
58964a49 | 226 | clear_sys_error(); |
d02b48c6 RE |
227 | |
228 | if (s->info_callback != NULL) | |
229 | cb=s->info_callback; | |
230 | else if (s->ctx->info_callback != NULL) | |
231 | cb=s->ctx->info_callback; | |
232 | ||
233 | /* init things to blank */ | |
d02b48c6 | 234 | s->in_handshake++; |
979689aa | 235 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); |
d02b48c6 | 236 | |
b56bce4f | 237 | if (s->cert == NULL) |
d02b48c6 RE |
238 | { |
239 | SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET); | |
b56bce4f | 240 | return(-1); |
d02b48c6 | 241 | } |
d02b48c6 | 242 | |
4817504d DSH |
243 | #ifndef OPENSSL_NO_HEARTBEATS |
244 | /* If we're awaiting a HeartbeatResponse, pretend we | |
245 | * already got and don't await it anymore, because | |
246 | * Heartbeats don't make sense during handshakes anyway. | |
247 | */ | |
248 | if (s->tlsext_hb_pending) | |
249 | { | |
250 | s->tlsext_hb_pending = 0; | |
251 | s->tlsext_hb_seq++; | |
252 | } | |
253 | #endif | |
254 | ||
d02b48c6 RE |
255 | for (;;) |
256 | { | |
257 | state=s->state; | |
258 | ||
259 | switch (s->state) | |
260 | { | |
261 | case SSL_ST_RENEGOTIATE: | |
44959ee4 | 262 | s->renegotiate=1; |
d02b48c6 RE |
263 | /* s->state=SSL_ST_ACCEPT; */ |
264 | ||
265 | case SSL_ST_BEFORE: | |
266 | case SSL_ST_ACCEPT: | |
267 | case SSL_ST_BEFORE|SSL_ST_ACCEPT: | |
268 | case SSL_ST_OK|SSL_ST_ACCEPT: | |
269 | ||
413c4f45 | 270 | s->server=1; |
d02b48c6 RE |
271 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); |
272 | ||
58964a49 | 273 | if ((s->version>>8) != 3) |
bbb8de09 | 274 | { |
5277d7cb | 275 | SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR); |
bbb8de09 BM |
276 | return -1; |
277 | } | |
b362ccab DSH |
278 | |
279 | if (!ssl_security(s, SSL_SECOP_VERSION, 0, | |
280 | s->version, NULL)) | |
281 | { | |
282 | SSLerr(SSL_F_SSL3_ACCEPT, SSL_R_VERSION_TOO_LOW); | |
283 | return -1; | |
284 | } | |
285 | ||
d02b48c6 RE |
286 | s->type=SSL_ST_ACCEPT; |
287 | ||
288 | if (s->init_buf == NULL) | |
289 | { | |
290 | if ((buf=BUF_MEM_new()) == NULL) | |
291 | { | |
292 | ret= -1; | |
293 | goto end; | |
294 | } | |
295 | if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) | |
296 | { | |
297 | ret= -1; | |
298 | goto end; | |
299 | } | |
300 | s->init_buf=buf; | |
301 | } | |
302 | ||
303 | if (!ssl3_setup_buffers(s)) | |
304 | { | |
305 | ret= -1; | |
306 | goto end; | |
307 | } | |
308 | ||
d02b48c6 | 309 | s->init_num=0; |
d0dc991c | 310 | s->s3->flags &= ~SSL3_FLAGS_SGC_RESTART_DONE; |
0d609395 | 311 | s->s3->flags &= ~TLS1_FLAGS_SKIP_CERT_VERIFY; |
e94a6c0e EK |
312 | s->s3->flags &= ~SSL3_FLAGS_CCS_OK; |
313 | /* Should have been reset by ssl3_get_finished, too. */ | |
314 | s->s3->change_cipher_spec = 0; | |
d02b48c6 RE |
315 | |
316 | if (s->state != SSL_ST_RENEGOTIATE) | |
317 | { | |
8e2f6b79 BM |
318 | /* Ok, we now need to push on a buffering BIO so that |
319 | * the output is sent in a way that TCP likes :-) | |
320 | */ | |
321 | if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; } | |
322 | ||
745c70e5 | 323 | ssl3_init_finished_mac(s); |
d02b48c6 | 324 | s->state=SSL3_ST_SR_CLNT_HELLO_A; |
413c4f45 | 325 | s->ctx->stats.sess_accept++; |
d02b48c6 | 326 | } |
3a88efd4 DSH |
327 | else if (!s->s3->send_connection_binding && |
328 | !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) | |
329 | { | |
330 | /* Server attempting to renegotiate with | |
331 | * client that doesn't support secure | |
332 | * renegotiation. | |
333 | */ | |
334 | SSLerr(SSL_F_SSL3_ACCEPT, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED); | |
335 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); | |
336 | ret = -1; | |
337 | goto end; | |
338 | } | |
d02b48c6 RE |
339 | else |
340 | { | |
8e2f6b79 BM |
341 | /* s->state == SSL_ST_RENEGOTIATE, |
342 | * we will just send a HelloRequest */ | |
413c4f45 | 343 | s->ctx->stats.sess_accept_renegotiate++; |
d02b48c6 RE |
344 | s->state=SSL3_ST_SW_HELLO_REQ_A; |
345 | } | |
346 | break; | |
347 | ||
348 | case SSL3_ST_SW_HELLO_REQ_A: | |
349 | case SSL3_ST_SW_HELLO_REQ_B: | |
350 | ||
351 | s->shutdown=0; | |
352 | ret=ssl3_send_hello_request(s); | |
353 | if (ret <= 0) goto end; | |
354 | s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C; | |
355 | s->state=SSL3_ST_SW_FLUSH; | |
356 | s->init_num=0; | |
357 | ||
358 | ssl3_init_finished_mac(s); | |
359 | break; | |
360 | ||
361 | case SSL3_ST_SW_HELLO_REQ_C: | |
d02b48c6 | 362 | s->state=SSL_ST_OK; |
2260ad21 | 363 | break; |
d02b48c6 RE |
364 | |
365 | case SSL3_ST_SR_CLNT_HELLO_A: | |
366 | case SSL3_ST_SR_CLNT_HELLO_B: | |
367 | case SSL3_ST_SR_CLNT_HELLO_C: | |
368 | ||
0ebc965b DSH |
369 | ret=ssl3_get_client_hello(s); |
370 | if (ret <= 0) goto end; | |
edc032b5 | 371 | #ifndef OPENSSL_NO_SRP |
0ebc965b DSH |
372 | s->state = SSL3_ST_SR_CLNT_HELLO_D; |
373 | case SSL3_ST_SR_CLNT_HELLO_D: | |
edc032b5 | 374 | { |
ebba6c48 | 375 | int al; |
c79f22c6 DSH |
376 | if ((ret = ssl_check_srp_ext_ClientHello(s,&al)) < 0) |
377 | { | |
378 | /* callback indicates firther work to be done */ | |
379 | s->rwstate=SSL_X509_LOOKUP; | |
380 | goto end; | |
381 | } | |
382 | if (ret != SSL_ERROR_NONE) | |
383 | { | |
384 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
385 | /* This is not really an error but the only means to | |
386 | for a client to detect whether srp is supported. */ | |
387 | if (al != TLS1_AD_UNKNOWN_PSK_IDENTITY) | |
388 | SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_CLIENTHELLO_TLSEXT); | |
ebba6c48 DSH |
389 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; |
390 | ret= -1; | |
391 | goto end; | |
c79f22c6 | 392 | } |
edc032b5 | 393 | } |
c79f22c6 | 394 | #endif |
58ece833 | 395 | |
44959ee4 | 396 | s->renegotiate = 2; |
d02b48c6 RE |
397 | s->state=SSL3_ST_SW_SRVR_HELLO_A; |
398 | s->init_num=0; | |
399 | break; | |
400 | ||
401 | case SSL3_ST_SW_SRVR_HELLO_A: | |
402 | case SSL3_ST_SW_SRVR_HELLO_B: | |
403 | ret=ssl3_send_server_hello(s); | |
404 | if (ret <= 0) goto end; | |
d26c905c | 405 | #ifndef OPENSSL_NO_TLSEXT |
d02b48c6 | 406 | if (s->hit) |
d26c905c DSH |
407 | { |
408 | if (s->tlsext_ticket_expected) | |
409 | s->state=SSL3_ST_SW_SESSION_TICKET_A; | |
410 | else | |
411 | s->state=SSL3_ST_SW_CHANGE_A; | |
412 | } | |
413 | #else | |
414 | if (s->hit) | |
415 | s->state=SSL3_ST_SW_CHANGE_A; | |
416 | #endif | |
d02b48c6 | 417 | else |
b948ee27 | 418 | s->state = SSL3_ST_SW_CERT_A; |
a9e1c50b | 419 | s->init_num = 0; |
d02b48c6 RE |
420 | break; |
421 | ||
422 | case SSL3_ST_SW_CERT_A: | |
423 | case SSL3_ST_SW_CERT_B: | |
cbb92dfa | 424 | /* Check if it is anon DH or anon ECDH, */ |
edc032b5 | 425 | /* normal PSK or KRB5 or SRP */ |
9e72d496 DSH |
426 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL|SSL_aKRB5|SSL_aSRP)) |
427 | && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) | |
d02b48c6 RE |
428 | { |
429 | ret=ssl3_send_server_certificate(s); | |
430 | if (ret <= 0) goto end; | |
67c8e7f4 DSH |
431 | #ifndef OPENSSL_NO_TLSEXT |
432 | if (s->tlsext_status_expected) | |
433 | s->state=SSL3_ST_SW_CERT_STATUS_A; | |
434 | else | |
435 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
d02b48c6 | 436 | } |
67c8e7f4 DSH |
437 | else |
438 | { | |
439 | skip = 1; | |
440 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
441 | } | |
442 | #else | |
3ce54f35 | 443 | } |
d02b48c6 RE |
444 | else |
445 | skip=1; | |
67c8e7f4 | 446 | |
d02b48c6 | 447 | s->state=SSL3_ST_SW_KEY_EXCH_A; |
67c8e7f4 | 448 | #endif |
d02b48c6 RE |
449 | s->init_num=0; |
450 | break; | |
451 | ||
452 | case SSL3_ST_SW_KEY_EXCH_A: | |
453 | case SSL3_ST_SW_KEY_EXCH_B: | |
52b8dad8 | 454 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
d02b48c6 RE |
455 | |
456 | /* clear this, it may get reset by | |
457 | * send_server_key_exchange */ | |
f9b3bff6 | 458 | if ((s->options & SSL_OP_EPHEMERAL_RSA) |
bc36ee62 | 459 | #ifndef OPENSSL_NO_KRB5 |
52b8dad8 | 460 | && !(alg_k & SSL_kKRB5) |
bc36ee62 | 461 | #endif /* OPENSSL_NO_KRB5 */ |
f9b3bff6 | 462 | ) |
7bc03ded BM |
463 | /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key |
464 | * even when forbidden by protocol specs | |
465 | * (handshake may fail as clients are not required to | |
466 | * be able to handle this) */ | |
d02b48c6 RE |
467 | s->s3->tmp.use_rsa_tmp=1; |
468 | else | |
469 | s->s3->tmp.use_rsa_tmp=0; | |
470 | ||
ea262260 | 471 | |
d02b48c6 | 472 | /* only send if a DH key exchange, fortezza or |
ea262260 BM |
473 | * RSA but we have a sign only certificate |
474 | * | |
ddac1974 NL |
475 | * PSK: may send PSK identity hints |
476 | * | |
ea262260 BM |
477 | * For ECC ciphersuites, we send a serverKeyExchange |
478 | * message only if the cipher suite is either | |
479 | * ECDH-anon or ECDHE. In other cases, the | |
89bbe14c | 480 | * server certificate contains the server's |
ea262260 BM |
481 | * public key for key exchange. |
482 | */ | |
06ab81f9 | 483 | if (s->s3->tmp.use_rsa_tmp |
ddac1974 NL |
484 | /* PSK: send ServerKeyExchange if PSK identity |
485 | * hint if provided */ | |
486 | #ifndef OPENSSL_NO_PSK | |
52b8dad8 | 487 | || ((alg_k & SSL_kPSK) && s->ctx->psk_identity_hint) |
edc032b5 BL |
488 | #endif |
489 | #ifndef OPENSSL_NO_SRP | |
490 | /* SRP: send ServerKeyExchange */ | |
491 | || (alg_k & SSL_kSRP) | |
ddac1974 | 492 | #endif |
5a21cadb | 493 | || (alg_k & SSL_kDHE) |
4082fea8 | 494 | || (alg_k & SSL_kECDHE) |
52b8dad8 | 495 | || ((alg_k & SSL_kRSA) |
b56bce4f | 496 | && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL |
018e57c7 DSH |
497 | || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) |
498 | && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher) | |
06ab81f9 BL |
499 | ) |
500 | ) | |
501 | ) | |
d02b48c6 | 502 | ) |
d02b48c6 RE |
503 | { |
504 | ret=ssl3_send_server_key_exchange(s); | |
505 | if (ret <= 0) goto end; | |
506 | } | |
507 | else | |
508 | skip=1; | |
509 | ||
510 | s->state=SSL3_ST_SW_CERT_REQ_A; | |
511 | s->init_num=0; | |
512 | break; | |
513 | ||
514 | case SSL3_ST_SW_CERT_REQ_A: | |
515 | case SSL3_ST_SW_CERT_REQ_B: | |
47134b78 BM |
516 | if (/* don't request cert unless asked for it: */ |
517 | !(s->verify_mode & SSL_VERIFY_PEER) || | |
518 | /* if SSL_VERIFY_CLIENT_ONCE is set, | |
519 | * don't request cert during re-negotiation: */ | |
d02b48c6 | 520 | ((s->session->peer != NULL) && |
47134b78 BM |
521 | (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) || |
522 | /* never request cert in anonymous ciphersuites | |
523 | * (see section "Certificate request" in SSL 3 drafts | |
524 | * and in RFC 2246): */ | |
52b8dad8 | 525 | ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && |
47134b78 BM |
526 | /* ... except when the application insists on verification |
527 | * (against the specs, but s3_clnt.c accepts this for SSL 3) */ | |
45442167 | 528 | !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) || |
52b8dad8 | 529 | /* never request cert in Kerberos ciphersuites */ |
9e72d496 DSH |
530 | (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) || |
531 | /* don't request certificate for SRP auth */ | |
532 | (s->s3->tmp.new_cipher->algorithm_auth & SSL_aSRP) | |
ddac1974 NL |
533 | /* With normal PSK Certificates and |
534 | * Certificate Requests are omitted */ | |
52b8dad8 | 535 | || (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) |
d02b48c6 RE |
536 | { |
537 | /* no cert request */ | |
538 | skip=1; | |
58964a49 | 539 | s->s3->tmp.cert_request=0; |
d02b48c6 | 540 | s->state=SSL3_ST_SW_SRVR_DONE_A; |
f37f20ff DSH |
541 | if (s->s3->handshake_buffer) |
542 | if (!ssl3_digest_cached_records(s)) | |
543 | return -1; | |
d02b48c6 RE |
544 | } |
545 | else | |
546 | { | |
58964a49 | 547 | s->s3->tmp.cert_request=1; |
d02b48c6 RE |
548 | ret=ssl3_send_certificate_request(s); |
549 | if (ret <= 0) goto end; | |
de469ef2 | 550 | #ifndef NETSCAPE_HANG_BUG |
d02b48c6 | 551 | s->state=SSL3_ST_SW_SRVR_DONE_A; |
de469ef2 DSH |
552 | #else |
553 | s->state=SSL3_ST_SW_FLUSH; | |
554 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
555 | #endif | |
d02b48c6 RE |
556 | s->init_num=0; |
557 | } | |
558 | break; | |
559 | ||
560 | case SSL3_ST_SW_SRVR_DONE_A: | |
561 | case SSL3_ST_SW_SRVR_DONE_B: | |
562 | ret=ssl3_send_server_done(s); | |
563 | if (ret <= 0) goto end; | |
564 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
565 | s->state=SSL3_ST_SW_FLUSH; | |
566 | s->init_num=0; | |
567 | break; | |
568 | ||
569 | case SSL3_ST_SW_FLUSH: | |
d5e7f2f2 DSH |
570 | |
571 | /* This code originally checked to see if | |
572 | * any data was pending using BIO_CTRL_INFO | |
573 | * and then flushed. This caused problems | |
574 | * as documented in PR#1939. The proposed | |
575 | * fix doesn't completely resolve this issue | |
576 | * as buggy implementations of BIO_CTRL_PENDING | |
577 | * still exist. So instead we just flush | |
578 | * unconditionally. | |
21a5c040 DSH |
579 | */ |
580 | ||
d5e7f2f2 DSH |
581 | s->rwstate=SSL_WRITING; |
582 | if (BIO_flush(s->wbio) <= 0) | |
d02b48c6 | 583 | { |
d5e7f2f2 DSH |
584 | ret= -1; |
585 | goto end; | |
d02b48c6 | 586 | } |
d5e7f2f2 | 587 | s->rwstate=SSL_NOTHING; |
d02b48c6 RE |
588 | |
589 | s->state=s->s3->tmp.next_state; | |
590 | break; | |
b948ee27 | 591 | |
d02b48c6 RE |
592 | case SSL3_ST_SR_CERT_A: |
593 | case SSL3_ST_SR_CERT_B: | |
745c70e5 | 594 | /* Check for second client hello (MS SGC) */ |
3d14b9d0 | 595 | ret = ssl3_check_client_hello(s); |
745c70e5 BM |
596 | if (ret <= 0) |
597 | goto end; | |
598 | if (ret == 2) | |
599 | s->state = SSL3_ST_SR_CLNT_HELLO_C; | |
3d14b9d0 | 600 | else { |
14f3d7c5 DSH |
601 | if (s->s3->tmp.cert_request) |
602 | { | |
603 | ret=ssl3_get_client_certificate(s); | |
604 | if (ret <= 0) goto end; | |
605 | } | |
3d14b9d0 DSH |
606 | s->init_num=0; |
607 | s->state=SSL3_ST_SR_KEY_EXCH_A; | |
608 | } | |
d02b48c6 RE |
609 | break; |
610 | ||
611 | case SSL3_ST_SR_KEY_EXCH_A: | |
612 | case SSL3_ST_SR_KEY_EXCH_B: | |
613 | ret=ssl3_get_client_key_exchange(s); | |
89bbe14c | 614 | if (ret <= 0) |
ea262260 BM |
615 | goto end; |
616 | if (ret == 2) | |
617 | { | |
618 | /* For the ECDH ciphersuites when | |
619 | * the client sends its ECDH pub key in | |
620 | * a certificate, the CertificateVerify | |
621 | * message is not sent. | |
f0288f05 DSH |
622 | * Also for GOST ciphersuites when |
623 | * the client uses its key from the certificate | |
624 | * for key exchange. | |
ea262260 | 625 | */ |
bf48836c | 626 | #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) |
ea262260 | 627 | s->state=SSL3_ST_SR_FINISHED_A; |
ee2ffc27 BL |
628 | #else |
629 | if (s->s3->next_proto_neg_seen) | |
630 | s->state=SSL3_ST_SR_NEXT_PROTO_A; | |
631 | else | |
632 | s->state=SSL3_ST_SR_FINISHED_A; | |
633 | #endif | |
ea262260 BM |
634 | s->init_num = 0; |
635 | } | |
cbd64894 | 636 | else if (SSL_USE_SIGALGS(s)) |
f37f20ff DSH |
637 | { |
638 | s->state=SSL3_ST_SR_CERT_VRFY_A; | |
639 | s->init_num=0; | |
640 | if (!s->session->peer) | |
641 | break; | |
cbd64894 | 642 | /* For sigalgs freeze the handshake buffer |
f37f20ff DSH |
643 | * at this point and digest cached records. |
644 | */ | |
645 | if (!s->s3->handshake_buffer) | |
646 | { | |
647 | SSLerr(SSL_F_SSL3_ACCEPT,ERR_R_INTERNAL_ERROR); | |
648 | return -1; | |
649 | } | |
650 | s->s3->flags |= TLS1_FLAGS_KEEP_HANDSHAKE; | |
651 | if (!ssl3_digest_cached_records(s)) | |
652 | return -1; | |
653 | } | |
89bbe14c | 654 | else |
ea262260 | 655 | { |
0e1dba93 DSH |
656 | int offset=0; |
657 | int dgst_num; | |
0eab41fb | 658 | |
ea262260 BM |
659 | s->state=SSL3_ST_SR_CERT_VRFY_A; |
660 | s->init_num=0; | |
d02b48c6 | 661 | |
ea262260 BM |
662 | /* We need to get hashes here so if there is |
663 | * a client cert, it can be verified | |
81025661 DSH |
664 | * FIXME - digest processing for CertificateVerify |
665 | * should be generalized. But it is next step | |
89bbe14c | 666 | */ |
0e1dba93 | 667 | if (s->s3->handshake_buffer) |
6ba71a71 BL |
668 | if (!ssl3_digest_cached_records(s)) |
669 | return -1; | |
0e1dba93 DSH |
670 | for (dgst_num=0; dgst_num<SSL_MAX_DIGEST;dgst_num++) |
671 | if (s->s3->handshake_dgst[dgst_num]) | |
672 | { | |
0eab41fb BL |
673 | int dgst_size; |
674 | ||
0e1dba93 | 675 | s->method->ssl3_enc->cert_verify_mac(s,EVP_MD_CTX_type(s->s3->handshake_dgst[dgst_num]),&(s->s3->tmp.cert_verify_md[offset])); |
0eab41fb BL |
676 | dgst_size=EVP_MD_CTX_size(s->s3->handshake_dgst[dgst_num]); |
677 | if (dgst_size < 0) | |
678 | { | |
679 | ret = -1; | |
680 | goto end; | |
681 | } | |
682 | offset+=dgst_size; | |
0e1dba93 | 683 | } |
ea262260 | 684 | } |
d02b48c6 RE |
685 | break; |
686 | ||
687 | case SSL3_ST_SR_CERT_VRFY_A: | |
688 | case SSL3_ST_SR_CERT_VRFY_B: | |
e94a6c0e EK |
689 | /* |
690 | * This *should* be the first time we enable CCS, but be | |
691 | * extra careful about surrounding code changes. We need | |
692 | * to set this here because we don't know if we're | |
693 | * expecting a CertificateVerify or not. | |
694 | */ | |
695 | if (!s->s3->change_cipher_spec) | |
696 | s->s3->flags |= SSL3_FLAGS_CCS_OK; | |
d02b48c6 RE |
697 | /* we should decide if we expected this one */ |
698 | ret=ssl3_get_cert_verify(s); | |
699 | if (ret <= 0) goto end; | |
700 | ||
bf48836c | 701 | #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) |
d02b48c6 | 702 | s->state=SSL3_ST_SR_FINISHED_A; |
ee2ffc27 BL |
703 | #else |
704 | if (s->s3->next_proto_neg_seen) | |
705 | s->state=SSL3_ST_SR_NEXT_PROTO_A; | |
706 | else | |
707 | s->state=SSL3_ST_SR_FINISHED_A; | |
708 | #endif | |
d02b48c6 RE |
709 | s->init_num=0; |
710 | break; | |
711 | ||
bf48836c | 712 | #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) |
ee2ffc27 BL |
713 | case SSL3_ST_SR_NEXT_PROTO_A: |
714 | case SSL3_ST_SR_NEXT_PROTO_B: | |
e94a6c0e EK |
715 | /* |
716 | * Enable CCS for resumed handshakes with NPN. | |
717 | * In a full handshake with NPN, we end up here through | |
718 | * SSL3_ST_SR_CERT_VRFY_B, where SSL3_FLAGS_CCS_OK was | |
719 | * already set. Receiving a CCS clears the flag, so make | |
720 | * sure not to re-enable it to ban duplicates. | |
721 | * s->s3->change_cipher_spec is set when a CCS is | |
722 | * processed in s3_pkt.c, and remains set until | |
723 | * the client's Finished message is read. | |
724 | */ | |
725 | if (!s->s3->change_cipher_spec) | |
726 | s->s3->flags |= SSL3_FLAGS_CCS_OK; | |
727 | ||
ee2ffc27 BL |
728 | ret=ssl3_get_next_proto(s); |
729 | if (ret <= 0) goto end; | |
730 | s->init_num = 0; | |
731 | s->state=SSL3_ST_SR_FINISHED_A; | |
732 | break; | |
733 | #endif | |
734 | ||
d02b48c6 RE |
735 | case SSL3_ST_SR_FINISHED_A: |
736 | case SSL3_ST_SR_FINISHED_B: | |
e94a6c0e EK |
737 | /* |
738 | * Enable CCS for resumed handshakes without NPN. | |
739 | * In a full handshake, we end up here through | |
740 | * SSL3_ST_SR_CERT_VRFY_B, where SSL3_FLAGS_CCS_OK was | |
741 | * already set. Receiving a CCS clears the flag, so make | |
742 | * sure not to re-enable it to ban duplicates. | |
743 | * s->s3->change_cipher_spec is set when a CCS is | |
744 | * processed in s3_pkt.c, and remains set until | |
745 | * the client's Finished message is read. | |
746 | */ | |
747 | if (!s->s3->change_cipher_spec) | |
748 | s->s3->flags |= SSL3_FLAGS_CCS_OK; | |
d02b48c6 | 749 | ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A, |
58964a49 | 750 | SSL3_ST_SR_FINISHED_B); |
d02b48c6 | 751 | if (ret <= 0) goto end; |
d26c905c DSH |
752 | if (s->hit) |
753 | s->state=SSL_ST_OK; | |
c519e89f BM |
754 | #ifndef OPENSSL_NO_TLSEXT |
755 | else if (s->tlsext_ticket_expected) | |
756 | s->state=SSL3_ST_SW_SESSION_TICKET_A; | |
6434abbf | 757 | #endif |
d02b48c6 RE |
758 | else |
759 | s->state=SSL3_ST_SW_CHANGE_A; | |
760 | s->init_num=0; | |
761 | break; | |
762 | ||
6434abbf DSH |
763 | #ifndef OPENSSL_NO_TLSEXT |
764 | case SSL3_ST_SW_SESSION_TICKET_A: | |
765 | case SSL3_ST_SW_SESSION_TICKET_B: | |
766 | ret=ssl3_send_newsession_ticket(s); | |
767 | if (ret <= 0) goto end; | |
768 | s->state=SSL3_ST_SW_CHANGE_A; | |
769 | s->init_num=0; | |
770 | break; | |
771 | ||
67c8e7f4 DSH |
772 | case SSL3_ST_SW_CERT_STATUS_A: |
773 | case SSL3_ST_SW_CERT_STATUS_B: | |
774 | ret=ssl3_send_cert_status(s); | |
775 | if (ret <= 0) goto end; | |
776 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
777 | s->init_num=0; | |
778 | break; | |
779 | ||
6434abbf DSH |
780 | #endif |
781 | ||
d02b48c6 RE |
782 | case SSL3_ST_SW_CHANGE_A: |
783 | case SSL3_ST_SW_CHANGE_B: | |
784 | ||
785 | s->session->cipher=s->s3->tmp.new_cipher; | |
58964a49 RE |
786 | if (!s->method->ssl3_enc->setup_key_block(s)) |
787 | { ret= -1; goto end; } | |
d02b48c6 RE |
788 | |
789 | ret=ssl3_send_change_cipher_spec(s, | |
790 | SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B); | |
791 | ||
792 | if (ret <= 0) goto end; | |
793 | s->state=SSL3_ST_SW_FINISHED_A; | |
794 | s->init_num=0; | |
795 | ||
58964a49 | 796 | if (!s->method->ssl3_enc->change_cipher_state(s, |
d02b48c6 RE |
797 | SSL3_CHANGE_CIPHER_SERVER_WRITE)) |
798 | { | |
799 | ret= -1; | |
800 | goto end; | |
801 | } | |
802 | ||
803 | break; | |
804 | ||
805 | case SSL3_ST_SW_FINISHED_A: | |
806 | case SSL3_ST_SW_FINISHED_B: | |
807 | ret=ssl3_send_finished(s, | |
808 | SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B, | |
c44f7540 BM |
809 | s->method->ssl3_enc->server_finished_label, |
810 | s->method->ssl3_enc->server_finished_label_len); | |
d02b48c6 RE |
811 | if (ret <= 0) goto end; |
812 | s->state=SSL3_ST_SW_FLUSH; | |
813 | if (s->hit) | |
ee2ffc27 | 814 | { |
bf48836c | 815 | #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) |
d02b48c6 | 816 | s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; |
ee2ffc27 BL |
817 | #else |
818 | if (s->s3->next_proto_neg_seen) | |
a91be108 | 819 | { |
ee2ffc27 | 820 | s->s3->tmp.next_state=SSL3_ST_SR_NEXT_PROTO_A; |
a91be108 | 821 | } |
ee2ffc27 BL |
822 | else |
823 | s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; | |
824 | #endif | |
825 | } | |
d02b48c6 RE |
826 | else |
827 | s->s3->tmp.next_state=SSL_ST_OK; | |
828 | s->init_num=0; | |
829 | break; | |
830 | ||
831 | case SSL_ST_OK: | |
832 | /* clean a few things up */ | |
833 | ssl3_cleanup_key_block(s); | |
834 | ||
835 | BUF_MEM_free(s->init_buf); | |
836 | s->init_buf=NULL; | |
837 | ||
838 | /* remove buffering on output */ | |
413c4f45 | 839 | ssl_free_wbio_buffer(s); |
d02b48c6 | 840 | |
d02b48c6 RE |
841 | s->init_num=0; |
842 | ||
44959ee4 | 843 | if (s->renegotiate == 2) /* skipped if we just sent a HelloRequest */ |
b49124f6 | 844 | { |
44959ee4 | 845 | s->renegotiate=0; |
b49124f6 BM |
846 | s->new_session=0; |
847 | ||
848 | ssl_update_cache(s,SSL_SESS_CACHE_SERVER); | |
849 | ||
850 | s->ctx->stats.sess_accept_good++; | |
851 | /* s->server=1; */ | |
852 | s->handshake_func=ssl3_accept; | |
d02b48c6 | 853 | |
b49124f6 BM |
854 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); |
855 | } | |
856 | ||
681bfae4 | 857 | ret = 1; |
d02b48c6 | 858 | goto end; |
58964a49 | 859 | /* break; */ |
d02b48c6 RE |
860 | |
861 | default: | |
862 | SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE); | |
863 | ret= -1; | |
864 | goto end; | |
58964a49 | 865 | /* break; */ |
d02b48c6 RE |
866 | } |
867 | ||
868 | if (!s->s3->tmp.reuse_message && !skip) | |
869 | { | |
58964a49 RE |
870 | if (s->debug) |
871 | { | |
872 | if ((ret=BIO_flush(s->wbio)) <= 0) | |
873 | goto end; | |
874 | } | |
875 | ||
d02b48c6 RE |
876 | |
877 | if ((cb != NULL) && (s->state != state)) | |
878 | { | |
879 | new_state=s->state; | |
880 | s->state=state; | |
881 | cb(s,SSL_CB_ACCEPT_LOOP,1); | |
882 | s->state=new_state; | |
883 | } | |
884 | } | |
885 | skip=0; | |
886 | } | |
887 | end: | |
888 | /* BIO_flush(s->wbio); */ | |
889 | ||
4d635a70 | 890 | s->in_handshake--; |
d02b48c6 RE |
891 | if (cb != NULL) |
892 | cb(s,SSL_CB_ACCEPT_EXIT,ret); | |
d02b48c6 RE |
893 | return(ret); |
894 | } | |
895 | ||
36d16f8e | 896 | int ssl3_send_hello_request(SSL *s) |
d02b48c6 | 897 | { |
d02b48c6 RE |
898 | |
899 | if (s->state == SSL3_ST_SW_HELLO_REQ_A) | |
900 | { | |
173e72e6 | 901 | ssl_set_handshake_header(s, SSL3_MT_HELLO_REQUEST, 0); |
d02b48c6 | 902 | s->state=SSL3_ST_SW_HELLO_REQ_B; |
d02b48c6 RE |
903 | } |
904 | ||
905 | /* SSL3_ST_SW_HELLO_REQ_B */ | |
173e72e6 | 906 | return ssl_do_write(s); |
d02b48c6 RE |
907 | } |
908 | ||
36d16f8e | 909 | int ssl3_check_client_hello(SSL *s) |
3d14b9d0 DSH |
910 | { |
911 | int ok; | |
912 | long n; | |
913 | ||
b78e5021 BM |
914 | /* this function is called when we really expect a Certificate message, |
915 | * so permit appropriate message length */ | |
36d16f8e | 916 | n=s->method->ssl_get_message(s, |
3d14b9d0 DSH |
917 | SSL3_ST_SR_CERT_A, |
918 | SSL3_ST_SR_CERT_B, | |
919 | -1, | |
c0f5dd07 | 920 | s->max_cert_list, |
3d14b9d0 DSH |
921 | &ok); |
922 | if (!ok) return((int)n); | |
923 | s->s3->tmp.reuse_message = 1; | |
a2a01589 BM |
924 | if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO) |
925 | { | |
206310c3 DSH |
926 | /* We only allow the client to restart the handshake once per |
927 | * negotiation. */ | |
928 | if (s->s3->flags & SSL3_FLAGS_SGC_RESTART_DONE) | |
929 | { | |
930 | SSLerr(SSL_F_SSL3_CHECK_CLIENT_HELLO, SSL_R_MULTIPLE_SGC_RESTARTS); | |
931 | return -1; | |
932 | } | |
a2a01589 | 933 | /* Throw away what we have done so far in the current handshake, |
e7928282 | 934 | * which will now be aborted. (A full SSL_clear would be too much.) */ |
bc36ee62 | 935 | #ifndef OPENSSL_NO_DH |
a2a01589 BM |
936 | if (s->s3->tmp.dh != NULL) |
937 | { | |
938 | DH_free(s->s3->tmp.dh); | |
939 | s->s3->tmp.dh = NULL; | |
940 | } | |
e7928282 BM |
941 | #endif |
942 | #ifndef OPENSSL_NO_ECDH | |
943 | if (s->s3->tmp.ecdh != NULL) | |
944 | { | |
945 | EC_KEY_free(s->s3->tmp.ecdh); | |
946 | s->s3->tmp.ecdh = NULL; | |
947 | } | |
a2a01589 | 948 | #endif |
d0dc991c | 949 | s->s3->flags |= SSL3_FLAGS_SGC_RESTART_DONE; |
a2a01589 BM |
950 | return 2; |
951 | } | |
3d14b9d0 DSH |
952 | return 1; |
953 | } | |
954 | ||
36d16f8e | 955 | int ssl3_get_client_hello(SSL *s) |
d02b48c6 | 956 | { |
09e4e4b9 | 957 | int i,j,ok,al=SSL_AD_INTERNAL_ERROR,ret= -1; |
6c61726b | 958 | unsigned int cookie_len; |
d02b48c6 RE |
959 | long n; |
960 | unsigned long id; | |
a4c4a7d5 | 961 | unsigned char *p,*d; |
d02b48c6 | 962 | SSL_CIPHER *c; |
09b6c2ef | 963 | #ifndef OPENSSL_NO_COMP |
a4c4a7d5 | 964 | unsigned char *q; |
413c4f45 | 965 | SSL_COMP *comp=NULL; |
09b6c2ef | 966 | #endif |
f73e07cf | 967 | STACK_OF(SSL_CIPHER) *ciphers=NULL; |
d02b48c6 | 968 | |
f04665a6 | 969 | if (s->state == SSL3_ST_SR_CLNT_HELLO_C && !s->first_packet) |
0ebc965b DSH |
970 | goto retry_cert; |
971 | ||
58964a49 RE |
972 | /* We do this so that we will respond with our native type. |
973 | * If we are TLSv1 and we get SSLv3, we will respond with TLSv1, | |
974 | * This down switching should be handled by a different method. | |
975 | * If we are SSLv3, we will respond with SSLv3, even if prompted with | |
976 | * TLSv1. | |
977 | */ | |
edc032b5 | 978 | if (s->state == SSL3_ST_SR_CLNT_HELLO_A |
edc032b5 | 979 | ) |
d02b48c6 | 980 | { |
d02b48c6 RE |
981 | s->state=SSL3_ST_SR_CLNT_HELLO_B; |
982 | } | |
1e24b3a0 | 983 | s->first_packet=1; |
36d16f8e | 984 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
985 | SSL3_ST_SR_CLNT_HELLO_B, |
986 | SSL3_ST_SR_CLNT_HELLO_C, | |
987 | SSL3_MT_CLIENT_HELLO, | |
988 | SSL3_RT_MAX_PLAIN_LENGTH, | |
989 | &ok); | |
990 | ||
991 | if (!ok) return((int)n); | |
1e24b3a0 | 992 | s->first_packet=0; |
48948d53 | 993 | d=p=(unsigned char *)s->init_msg; |
d02b48c6 | 994 | |
074309b7 BM |
995 | /* use version from inside client hello, not from record header |
996 | * (may differ: see RFC 2246, Appendix E, second paragraph) */ | |
997 | s->client_version=(((int)p[0])<<8)|(int)p[1]; | |
d02b48c6 RE |
998 | p+=2; |
999 | ||
b77b58a3 DSH |
1000 | if (SSL_IS_DTLS(s) ? (s->client_version > s->version && |
1001 | s->method->version != DTLS_ANY_VERSION) | |
1002 | : (s->client_version < s->version)) | |
a661b653 BM |
1003 | { |
1004 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER); | |
b77b58a3 DSH |
1005 | if ((s->client_version>>8) == SSL3_VERSION_MAJOR && |
1006 | !s->enc_write_ctx && !s->write_hash) | |
a661b653 BM |
1007 | { |
1008 | /* similar to ssl3_get_record, send alert using remote version number */ | |
1009 | s->version = s->client_version; | |
1010 | } | |
1011 | al = SSL_AD_PROTOCOL_VERSION; | |
1012 | goto f_err; | |
1013 | } | |
1014 | ||
07a9d1a2 DSH |
1015 | /* If we require cookies and this ClientHello doesn't |
1016 | * contain one, just return since we do not want to | |
1017 | * allocate any memory yet. So check cookie length... | |
1018 | */ | |
1019 | if (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) | |
1020 | { | |
1021 | unsigned int session_length, cookie_length; | |
1022 | ||
1023 | session_length = *(p + SSL3_RANDOM_SIZE); | |
1024 | cookie_length = *(p + SSL3_RANDOM_SIZE + session_length + 1); | |
1025 | ||
14b148d3 | 1026 | if (cookie_length == 0) |
07a9d1a2 DSH |
1027 | return 1; |
1028 | } | |
1029 | ||
d02b48c6 RE |
1030 | /* load the client random */ |
1031 | memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE); | |
1032 | p+=SSL3_RANDOM_SIZE; | |
1033 | ||
1034 | /* get the session-id */ | |
1035 | j= *(p++); | |
1036 | ||
1037 | s->hit=0; | |
c519e89f BM |
1038 | /* Versions before 0.9.7 always allow clients to resume sessions in renegotiation. |
1039 | * 0.9.7 and later allow this by default, but optionally ignore resumption requests | |
1040 | * with flag SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION (it's a new flag rather | |
1041 | * than a change to default behavior so that applications relying on this for security | |
1042 | * won't even compile against older library versions). | |
1043 | * | |
1044 | * 1.0.1 and later also have a function SSL_renegotiate_abbreviated() to request | |
1045 | * renegotiation but not a new session (s->new_session remains unset): for servers, | |
1046 | * this essentially just means that the SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION | |
1047 | * setting will be ignored. | |
6b0e9fac | 1048 | */ |
6434abbf | 1049 | if ((s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION))) |
d02b48c6 RE |
1050 | { |
1051 | if (!ssl_get_new_session(s,1)) | |
1052 | goto err; | |
1053 | } | |
1054 | else | |
1055 | { | |
6434abbf | 1056 | i=ssl_get_prev_session(s, p, j, d + n); |
d02b48c6 RE |
1057 | if (i == 1) |
1058 | { /* previous session */ | |
1059 | s->hit=1; | |
1060 | } | |
8876bc05 BM |
1061 | else if (i == -1) |
1062 | goto err; | |
1063 | else /* i == 0 */ | |
d02b48c6 RE |
1064 | { |
1065 | if (!ssl_get_new_session(s,1)) | |
1066 | goto err; | |
1067 | } | |
1068 | } | |
1069 | ||
1070 | p+=j; | |
36d16f8e | 1071 | |
cbd64894 | 1072 | if (SSL_IS_DTLS(s)) |
36d16f8e BL |
1073 | { |
1074 | /* cookie stuff */ | |
1075 | cookie_len = *(p++); | |
1076 | ||
beb056b3 BM |
1077 | /* |
1078 | * The ClientHello may contain a cookie even if the | |
1079 | * HelloVerify message has not been sent--make sure that it | |
1080 | * does not cause an overflow. | |
1081 | */ | |
36d16f8e BL |
1082 | if ( cookie_len > sizeof(s->d1->rcvd_cookie)) |
1083 | { | |
1084 | /* too much data */ | |
beb056b3 | 1085 | al = SSL_AD_DECODE_ERROR; |
36d16f8e BL |
1086 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH); |
1087 | goto f_err; | |
1088 | } | |
1089 | ||
beb056b3 | 1090 | /* verify the cookie if appropriate option is set. */ |
07a9d1a2 | 1091 | if ((SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) && |
beb056b3 BM |
1092 | cookie_len > 0) |
1093 | { | |
1094 | memcpy(s->d1->rcvd_cookie, p, cookie_len); | |
1095 | ||
1096 | if ( s->ctx->app_verify_cookie_cb != NULL) | |
1097 | { | |
1098 | if ( s->ctx->app_verify_cookie_cb(s, s->d1->rcvd_cookie, | |
1099 | cookie_len) == 0) | |
1100 | { | |
1101 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1102 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, | |
1103 | SSL_R_COOKIE_MISMATCH); | |
1104 | goto f_err; | |
1105 | } | |
1106 | /* else cookie verification succeeded */ | |
1107 | } | |
1108 | else if ( memcmp(s->d1->rcvd_cookie, s->d1->cookie, | |
1109 | s->d1->cookie_len) != 0) /* default verification */ | |
1110 | { | |
1111 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1112 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, | |
1113 | SSL_R_COOKIE_MISMATCH); | |
1114 | goto f_err; | |
1115 | } | |
c56f5b8e DSH |
1116 | /* Set to -2 so if successful we return 2 */ |
1117 | ret = -2; | |
beb056b3 BM |
1118 | } |
1119 | ||
1120 | p += cookie_len; | |
c6913eeb DSH |
1121 | if (s->method->version == DTLS_ANY_VERSION) |
1122 | { | |
1123 | /* Select version to use */ | |
1124 | if (s->client_version <= DTLS1_2_VERSION && | |
1125 | !(s->options & SSL_OP_NO_DTLSv1_2)) | |
1126 | { | |
1127 | s->version = DTLS1_2_VERSION; | |
1128 | s->method = DTLSv1_2_server_method(); | |
1129 | } | |
4544f0a6 DSH |
1130 | else if (tls1_suiteb(s)) |
1131 | { | |
1132 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_ONLY_DTLS_1_2_ALLOWED_IN_SUITEB_MODE); | |
1133 | s->version = s->client_version; | |
1134 | al = SSL_AD_PROTOCOL_VERSION; | |
1135 | goto f_err; | |
1136 | } | |
c6913eeb DSH |
1137 | else if (s->client_version <= DTLS1_VERSION && |
1138 | !(s->options & SSL_OP_NO_DTLSv1)) | |
1139 | { | |
1140 | s->version = DTLS1_VERSION; | |
1141 | s->method = DTLSv1_server_method(); | |
1142 | } | |
1143 | else | |
1144 | { | |
1145 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER); | |
1146 | s->version = s->client_version; | |
1147 | al = SSL_AD_PROTOCOL_VERSION; | |
1148 | goto f_err; | |
1149 | } | |
1150 | s->session->ssl_version = s->version; | |
1151 | } | |
36d16f8e BL |
1152 | } |
1153 | ||
d02b48c6 RE |
1154 | n2s(p,i); |
1155 | if ((i == 0) && (j != 0)) | |
1156 | { | |
1157 | /* we need a cipher if we are not resuming a session */ | |
58964a49 | 1158 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
1159 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED); |
1160 | goto f_err; | |
1161 | } | |
82b0bf0b | 1162 | if ((p+i) >= (d+n)) |
d02b48c6 RE |
1163 | { |
1164 | /* not enough data */ | |
58964a49 | 1165 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1166 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); |
1167 | goto f_err; | |
1168 | } | |
1169 | if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers)) | |
1170 | == NULL)) | |
1171 | { | |
1172 | goto err; | |
1173 | } | |
1174 | p+=i; | |
1175 | ||
1176 | /* If it is a hit, check that the cipher is in the list */ | |
1177 | if ((s->hit) && (i > 0)) | |
1178 | { | |
1179 | j=0; | |
1180 | id=s->session->cipher->id; | |
1181 | ||
413c4f45 MC |
1182 | #ifdef CIPHER_DEBUG |
1183 | printf("client sent %d ciphers\n",sk_num(ciphers)); | |
1184 | #endif | |
f73e07cf | 1185 | for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++) |
d02b48c6 | 1186 | { |
f73e07cf | 1187 | c=sk_SSL_CIPHER_value(ciphers,i); |
413c4f45 MC |
1188 | #ifdef CIPHER_DEBUG |
1189 | printf("client [%2d of %2d]:%s\n", | |
1190 | i,sk_num(ciphers),SSL_CIPHER_get_name(c)); | |
1191 | #endif | |
d02b48c6 RE |
1192 | if (c->id == id) |
1193 | { | |
1194 | j=1; | |
1195 | break; | |
1196 | } | |
1197 | } | |
88f2a4cf BM |
1198 | /* Disabled because it can be used in a ciphersuite downgrade |
1199 | * attack: CVE-2010-4180. | |
1200 | */ | |
1201 | #if 0 | |
837f2fc7 | 1202 | if (j == 0 && (s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1)) |
d02b48c6 | 1203 | { |
837f2fc7 BM |
1204 | /* Special case as client bug workaround: the previously used cipher may |
1205 | * not be in the current list, the client instead might be trying to | |
1206 | * continue using a cipher that before wasn't chosen due to server | |
1207 | * preferences. We'll have to reject the connection if the cipher is not | |
1208 | * enabled, though. */ | |
1209 | c = sk_SSL_CIPHER_value(ciphers, 0); | |
1210 | if (sk_SSL_CIPHER_find(SSL_get_ciphers(s), c) >= 0) | |
d02b48c6 | 1211 | { |
837f2fc7 BM |
1212 | s->session->cipher = c; |
1213 | j = 1; | |
d02b48c6 RE |
1214 | } |
1215 | } | |
88f2a4cf | 1216 | #endif |
837f2fc7 BM |
1217 | if (j == 0) |
1218 | { | |
1219 | /* we need to have the cipher in the cipher | |
1220 | * list if we are asked to reuse it */ | |
1221 | al=SSL_AD_ILLEGAL_PARAMETER; | |
1222 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING); | |
1223 | goto f_err; | |
1224 | } | |
d02b48c6 RE |
1225 | } |
1226 | ||
1227 | /* compression */ | |
1228 | i= *(p++); | |
82b0bf0b BM |
1229 | if ((p+i) > (d+n)) |
1230 | { | |
1231 | /* not enough data */ | |
1232 | al=SSL_AD_DECODE_ERROR; | |
1233 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); | |
1234 | goto f_err; | |
1235 | } | |
a4c4a7d5 | 1236 | #ifndef OPENSSL_NO_COMP |
413c4f45 | 1237 | q=p; |
a4c4a7d5 | 1238 | #endif |
d02b48c6 | 1239 | for (j=0; j<i; j++) |
413c4f45 | 1240 | { |
d02b48c6 | 1241 | if (p[j] == 0) break; |
413c4f45 | 1242 | } |
d02b48c6 RE |
1243 | |
1244 | p+=i; | |
1245 | if (j >= i) | |
1246 | { | |
1247 | /* no compress */ | |
58964a49 | 1248 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1249 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED); |
1250 | goto f_err; | |
1251 | } | |
1252 | ||
58ece833 BM |
1253 | #ifndef OPENSSL_NO_TLSEXT |
1254 | /* TLS extensions*/ | |
13f6d57b | 1255 | if (s->version >= SSL3_VERSION) |
58ece833 | 1256 | { |
b2284ed3 | 1257 | if (!ssl_parse_clienthello_tlsext(s,&p,d,n)) |
58ece833 | 1258 | { |
36ca4ba6 | 1259 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_PARSE_TLSEXT); |
58ece833 | 1260 | goto err; |
b2284ed3 | 1261 | } |
58ece833 | 1262 | } |
12bf56c0 DSH |
1263 | |
1264 | /* Check if we want to use external pre-shared secret for this | |
1265 | * handshake for not reused session only. We need to generate | |
1266 | * server_random before calling tls_session_secret_cb in order to allow | |
1267 | * SessionTicket processing to use it in key derivation. */ | |
1268 | { | |
12bf56c0 | 1269 | unsigned char *pos; |
12bf56c0 | 1270 | pos=s->s3->server_random; |
2016265d | 1271 | if (ssl_fill_hello_random(s, 1, pos, SSL3_RANDOM_SIZE) <= 0) |
12bf56c0 | 1272 | { |
12bf56c0 DSH |
1273 | goto f_err; |
1274 | } | |
1275 | } | |
1276 | ||
1277 | if (!s->hit && s->version >= TLS1_VERSION && s->tls_session_secret_cb) | |
1278 | { | |
1279 | SSL_CIPHER *pref_cipher=NULL; | |
1280 | ||
1281 | s->session->master_key_length=sizeof(s->session->master_key); | |
1282 | if(s->tls_session_secret_cb(s, s->session->master_key, &s->session->master_key_length, | |
1283 | ciphers, &pref_cipher, s->tls_session_secret_cb_arg)) | |
1284 | { | |
1285 | s->hit=1; | |
1286 | s->session->ciphers=ciphers; | |
1287 | s->session->verify_result=X509_V_OK; | |
1288 | ||
1289 | ciphers=NULL; | |
1290 | ||
1291 | /* check if some cipher was preferred by call back */ | |
1292 | pref_cipher=pref_cipher ? pref_cipher : ssl3_choose_cipher(s, s->session->ciphers, SSL_get_ciphers(s)); | |
1293 | if (pref_cipher == NULL) | |
1294 | { | |
1295 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1296 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER); | |
1297 | goto f_err; | |
1298 | } | |
1299 | ||
1300 | s->session->cipher=pref_cipher; | |
1301 | ||
1302 | if (s->cipher_list) | |
1303 | sk_SSL_CIPHER_free(s->cipher_list); | |
1304 | ||
1305 | if (s->cipher_list_by_id) | |
1306 | sk_SSL_CIPHER_free(s->cipher_list_by_id); | |
1307 | ||
1308 | s->cipher_list = sk_SSL_CIPHER_dup(s->session->ciphers); | |
1309 | s->cipher_list_by_id = sk_SSL_CIPHER_dup(s->session->ciphers); | |
1310 | } | |
1311 | } | |
58ece833 BM |
1312 | #endif |
1313 | ||
413c4f45 MC |
1314 | /* Worst case, we will use the NULL compression, but if we have other |
1315 | * options, we will now look for them. We have i-1 compression | |
1316 | * algorithms from the client, starting at q. */ | |
1317 | s->s3->tmp.new_compression=NULL; | |
09b6c2ef | 1318 | #ifndef OPENSSL_NO_COMP |
e6f418bc DSH |
1319 | /* This only happens if we have a cache hit */ |
1320 | if (s->session->compress_meth != 0) | |
1321 | { | |
1322 | int m, comp_id = s->session->compress_meth; | |
1323 | /* Perform sanity checks on resumed compression algorithm */ | |
1324 | /* Can't disable compression */ | |
b362ccab | 1325 | if (!ssl_allow_compression(s)) |
e6f418bc | 1326 | { |
e6f418bc DSH |
1327 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INCONSISTENT_COMPRESSION); |
1328 | goto f_err; | |
1329 | } | |
1330 | /* Look for resumed compression method */ | |
1331 | for (m = 0; m < sk_SSL_COMP_num(s->ctx->comp_methods); m++) | |
1332 | { | |
1333 | comp=sk_SSL_COMP_value(s->ctx->comp_methods,m); | |
1334 | if (comp_id == comp->id) | |
1335 | { | |
1336 | s->s3->tmp.new_compression=comp; | |
1337 | break; | |
1338 | } | |
1339 | } | |
1340 | if (s->s3->tmp.new_compression == NULL) | |
1341 | { | |
e6f418bc DSH |
1342 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INVALID_COMPRESSION_ALGORITHM); |
1343 | goto f_err; | |
1344 | } | |
1345 | /* Look for resumed method in compression list */ | |
1346 | for (m = 0; m < i; m++) | |
1347 | { | |
1348 | if (q[m] == comp_id) | |
1349 | break; | |
1350 | } | |
1351 | if (m >= i) | |
1352 | { | |
1353 | al=SSL_AD_ILLEGAL_PARAMETER; | |
1354 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_COMPRESSSION_ALGORITHM_MISSING); | |
1355 | goto f_err; | |
1356 | } | |
1357 | } | |
1358 | else if (s->hit) | |
1359 | comp = NULL; | |
b362ccab | 1360 | else if (ssl_allow_compression(s) && s->ctx->comp_methods) |
413c4f45 MC |
1361 | { /* See if we have a match */ |
1362 | int m,nn,o,v,done=0; | |
1363 | ||
f73e07cf | 1364 | nn=sk_SSL_COMP_num(s->ctx->comp_methods); |
413c4f45 MC |
1365 | for (m=0; m<nn; m++) |
1366 | { | |
f73e07cf | 1367 | comp=sk_SSL_COMP_value(s->ctx->comp_methods,m); |
413c4f45 MC |
1368 | v=comp->id; |
1369 | for (o=0; o<i; o++) | |
1370 | { | |
1371 | if (v == q[o]) | |
1372 | { | |
1373 | done=1; | |
1374 | break; | |
1375 | } | |
1376 | } | |
1377 | if (done) break; | |
1378 | } | |
1379 | if (done) | |
1380 | s->s3->tmp.new_compression=comp; | |
1381 | else | |
1382 | comp=NULL; | |
1383 | } | |
e6f418bc DSH |
1384 | #else |
1385 | /* If compression is disabled we'd better not try to resume a session | |
1386 | * using compression. | |
1387 | */ | |
2be3d6eb | 1388 | if (s->session->compress_meth != 0) |
e6f418bc | 1389 | { |
e6f418bc DSH |
1390 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INCONSISTENT_COMPRESSION); |
1391 | goto f_err; | |
1392 | } | |
09b6c2ef | 1393 | #endif |
413c4f45 | 1394 | |
836f9960 | 1395 | /* Given s->session->ciphers and SSL_get_ciphers, we must |
d02b48c6 RE |
1396 | * pick a cipher */ |
1397 | ||
1398 | if (!s->hit) | |
1399 | { | |
09b6c2ef DSH |
1400 | #ifdef OPENSSL_NO_COMP |
1401 | s->session->compress_meth=0; | |
1402 | #else | |
413c4f45 | 1403 | s->session->compress_meth=(comp == NULL)?0:comp->id; |
09b6c2ef | 1404 | #endif |
d02b48c6 | 1405 | if (s->session->ciphers != NULL) |
f73e07cf | 1406 | sk_SSL_CIPHER_free(s->session->ciphers); |
d02b48c6 RE |
1407 | s->session->ciphers=ciphers; |
1408 | if (ciphers == NULL) | |
1409 | { | |
58964a49 | 1410 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
1411 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED); |
1412 | goto f_err; | |
1413 | } | |
050ce4ca | 1414 | ciphers=NULL; |
e469af8d DSH |
1415 | if (!tls1_set_server_sigalgs(s)) |
1416 | { | |
1417 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); | |
1418 | goto err; | |
1419 | } | |
18d71588 | 1420 | /* Let cert callback update server certificates if required */ |
0ebc965b DSH |
1421 | retry_cert: |
1422 | if (s->cert->cert_cb) | |
18d71588 | 1423 | { |
0ebc965b DSH |
1424 | int rv = s->cert->cert_cb(s, s->cert->cert_cb_arg); |
1425 | if (rv == 0) | |
1426 | { | |
1427 | al=SSL_AD_INTERNAL_ERROR; | |
1428 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_CERT_CB_ERROR); | |
1429 | goto f_err; | |
1430 | } | |
1431 | if (rv < 0) | |
1432 | { | |
1433 | s->rwstate=SSL_X509_LOOKUP; | |
1434 | return -1; | |
1435 | } | |
1436 | s->rwstate = SSL_NOTHING; | |
18d71588 | 1437 | } |
d02b48c6 | 1438 | c=ssl3_choose_cipher(s,s->session->ciphers, |
836f9960 | 1439 | SSL_get_ciphers(s)); |
d02b48c6 RE |
1440 | |
1441 | if (c == NULL) | |
1442 | { | |
58964a49 | 1443 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1444 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER); |
1445 | goto f_err; | |
1446 | } | |
1447 | s->s3->tmp.new_cipher=c; | |
7c2d4fee BM |
1448 | /* check whether we should disable session resumption */ |
1449 | if (s->not_resumable_session_cb != NULL) | |
1450 | s->session->not_resumable=s->not_resumable_session_cb(s, | |
5a21cadb | 1451 | ((c->algorithm_mkey & (SSL_kDHE | SSL_kECDHE)) != 0)); |
7c2d4fee BM |
1452 | if (s->session->not_resumable) |
1453 | /* do not send a session ticket */ | |
1454 | s->tlsext_ticket_expected = 0; | |
d02b48c6 RE |
1455 | } |
1456 | else | |
1457 | { | |
1458 | /* Session-id reuse */ | |
1459 | #ifdef REUSE_CIPHER_BUG | |
f73e07cf | 1460 | STACK_OF(SSL_CIPHER) *sk; |
d02b48c6 RE |
1461 | SSL_CIPHER *nc=NULL; |
1462 | SSL_CIPHER *ec=NULL; | |
1463 | ||
58964a49 | 1464 | if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG) |
d02b48c6 RE |
1465 | { |
1466 | sk=s->session->ciphers; | |
f73e07cf | 1467 | for (i=0; i<sk_SSL_CIPHER_num(sk); i++) |
d02b48c6 | 1468 | { |
f73e07cf | 1469 | c=sk_SSL_CIPHER_value(sk,i); |
52b8dad8 | 1470 | if (c->algorithm_enc & SSL_eNULL) |
d02b48c6 | 1471 | nc=c; |
06ab81f9 | 1472 | if (SSL_C_IS_EXPORT(c)) |
d02b48c6 RE |
1473 | ec=c; |
1474 | } | |
1475 | if (nc != NULL) | |
1476 | s->s3->tmp.new_cipher=nc; | |
1477 | else if (ec != NULL) | |
1478 | s->s3->tmp.new_cipher=ec; | |
1479 | else | |
1480 | s->s3->tmp.new_cipher=s->session->cipher; | |
1481 | } | |
1482 | else | |
1483 | #endif | |
1484 | s->s3->tmp.new_cipher=s->session->cipher; | |
1485 | } | |
30551400 | 1486 | |
cbd64894 | 1487 | if (!SSL_USE_SIGALGS(s) || !(s->verify_mode & SSL_VERIFY_PEER)) |
f37f20ff DSH |
1488 | { |
1489 | if (!ssl3_digest_cached_records(s)) | |
1490 | goto f_err; | |
1491 | } | |
d02b48c6 RE |
1492 | |
1493 | /* we now have the following setup. | |
1494 | * client_random | |
1495 | * cipher_list - our prefered list of ciphers | |
1496 | * ciphers - the clients prefered list of ciphers | |
1497 | * compression - basically ignored right now | |
1498 | * ssl version is set - sslv3 | |
1499 | * s->session - The ssl session has been setup. | |
657e60fa | 1500 | * s->hit - session reuse flag |
04f545a0 | 1501 | * s->s3->tmp.new_cipher- the new cipher to use. |
d02b48c6 RE |
1502 | */ |
1503 | ||
2daceb03 BL |
1504 | /* Handles TLS extensions that we couldn't check earlier */ |
1505 | if (s->version >= SSL3_VERSION) | |
1506 | { | |
1507 | if (ssl_check_clienthello_tlsext_late(s) <= 0) | |
1508 | { | |
1509 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_CLIENTHELLO_TLSEXT); | |
1510 | goto err; | |
1511 | } | |
1512 | } | |
1513 | ||
c56f5b8e | 1514 | if (ret < 0) ret=-ret; |
d02b48c6 RE |
1515 | if (0) |
1516 | { | |
1517 | f_err: | |
1518 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1519 | } | |
1520 | err: | |
f73e07cf | 1521 | if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers); |
c56f5b8e | 1522 | return ret < 0 ? -1 : ret; |
d02b48c6 RE |
1523 | } |
1524 | ||
36d16f8e | 1525 | int ssl3_send_server_hello(SSL *s) |
d02b48c6 RE |
1526 | { |
1527 | unsigned char *buf; | |
1528 | unsigned char *p,*d; | |
e9add063 SD |
1529 | int i,sl; |
1530 | int al = 0; | |
12bf56c0 | 1531 | unsigned long l; |
d02b48c6 RE |
1532 | |
1533 | if (s->state == SSL3_ST_SW_SRVR_HELLO_A) | |
1534 | { | |
1535 | buf=(unsigned char *)s->init_buf->data; | |
12bf56c0 | 1536 | #ifdef OPENSSL_NO_TLSEXT |
d02b48c6 | 1537 | p=s->s3->server_random; |
2927791d | 1538 | if (ssl_fill_hello_random(s, 1, p, SSL3_RANDOM_SIZE) <= 0) |
7c7667b8 | 1539 | return -1; |
12bf56c0 | 1540 | #endif |
d02b48c6 | 1541 | /* Do the message type and length last */ |
173e72e6 | 1542 | d=p= ssl_handshake_start(s); |
d02b48c6 | 1543 | |
58964a49 RE |
1544 | *(p++)=s->version>>8; |
1545 | *(p++)=s->version&0xff; | |
d02b48c6 RE |
1546 | |
1547 | /* Random stuff */ | |
1548 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
1549 | p+=SSL3_RANDOM_SIZE; | |
1550 | ||
c519e89f BM |
1551 | /* There are several cases for the session ID to send |
1552 | * back in the server hello: | |
1553 | * - For session reuse from the session cache, | |
1554 | * we send back the old session ID. | |
1555 | * - If stateless session reuse (using a session ticket) | |
1556 | * is successful, we send back the client's "session ID" | |
1557 | * (which doesn't actually identify the session). | |
1558 | * - If it is a new session, we send back the new | |
1559 | * session ID. | |
1560 | * - However, if we want the new session to be single-use, | |
1561 | * we send back a 0-length session ID. | |
1562 | * s->hit is non-zero in either case of session reuse, | |
1563 | * so the following won't overwrite an ID that we're supposed | |
1564 | * to send back. | |
d02b48c6 | 1565 | */ |
7c2d4fee BM |
1566 | if (s->session->not_resumable || |
1567 | (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER) | |
1568 | && !s->hit)) | |
58964a49 | 1569 | s->session->session_id_length=0; |
d02b48c6 RE |
1570 | |
1571 | sl=s->session->session_id_length; | |
27545970 | 1572 | if (sl > (int)sizeof(s->session->session_id)) |
5574e0ed BM |
1573 | { |
1574 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1575 | return -1; | |
1576 | } | |
d02b48c6 RE |
1577 | *(p++)=sl; |
1578 | memcpy(p,s->session->session_id,sl); | |
1579 | p+=sl; | |
1580 | ||
1581 | /* put the cipher */ | |
1582 | i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p); | |
1583 | p+=i; | |
1584 | ||
1585 | /* put the compression method */ | |
09b6c2ef DSH |
1586 | #ifdef OPENSSL_NO_COMP |
1587 | *(p++)=0; | |
1588 | #else | |
413c4f45 MC |
1589 | if (s->s3->tmp.new_compression == NULL) |
1590 | *(p++)=0; | |
1591 | else | |
1592 | *(p++)=s->s3->tmp.new_compression->id; | |
09b6c2ef | 1593 | #endif |
ed3883d2 | 1594 | #ifndef OPENSSL_NO_TLSEXT |
36ca4ba6 BM |
1595 | if (ssl_prepare_serverhello_tlsext(s) <= 0) |
1596 | { | |
1597 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); | |
1598 | return -1; | |
1599 | } | |
e9add063 | 1600 | if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL) |
f1fd4544 | 1601 | { |
e9add063 | 1602 | ssl3_send_alert(s, SSL3_AL_FATAL, al); |
ed3883d2 BM |
1603 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR); |
1604 | return -1; | |
f1fd4544 | 1605 | } |
ed3883d2 | 1606 | #endif |
d02b48c6 RE |
1607 | /* do the header */ |
1608 | l=(p-d); | |
173e72e6 | 1609 | ssl_set_handshake_header(s, SSL3_MT_SERVER_HELLO, l); |
fcbdde0d | 1610 | s->state=SSL3_ST_SW_SRVR_HELLO_B; |
d02b48c6 RE |
1611 | } |
1612 | ||
fcbdde0d | 1613 | /* SSL3_ST_SW_SRVR_HELLO_B */ |
173e72e6 | 1614 | return ssl_do_write(s); |
d02b48c6 RE |
1615 | } |
1616 | ||
36d16f8e | 1617 | int ssl3_send_server_done(SSL *s) |
d02b48c6 | 1618 | { |
d02b48c6 RE |
1619 | |
1620 | if (s->state == SSL3_ST_SW_SRVR_DONE_A) | |
1621 | { | |
173e72e6 DSH |
1622 | ssl_set_handshake_header(s, SSL3_MT_SERVER_DONE, 0); |
1623 | s->state = SSL3_ST_SW_SRVR_DONE_B; | |
d02b48c6 RE |
1624 | } |
1625 | ||
e65bcbce | 1626 | /* SSL3_ST_SW_SRVR_DONE_B */ |
173e72e6 | 1627 | return ssl_do_write(s); |
d02b48c6 RE |
1628 | } |
1629 | ||
36d16f8e | 1630 | int ssl3_send_server_key_exchange(SSL *s) |
d02b48c6 | 1631 | { |
bc36ee62 | 1632 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
1633 | unsigned char *q; |
1634 | int j,num; | |
1635 | RSA *rsa; | |
1636 | unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; | |
752d706a | 1637 | unsigned int u; |
d02b48c6 | 1638 | #endif |
bc36ee62 | 1639 | #ifndef OPENSSL_NO_DH |
9d1a01be | 1640 | DH *dh=NULL,*dhp; |
ea262260 BM |
1641 | #endif |
1642 | #ifndef OPENSSL_NO_ECDH | |
1643 | EC_KEY *ecdh=NULL, *ecdhp; | |
1644 | unsigned char *encodedPoint = NULL; | |
1645 | int encodedlen = 0; | |
1646 | int curve_id = 0; | |
1647 | BN_CTX *bn_ctx = NULL; | |
d02b48c6 RE |
1648 | #endif |
1649 | EVP_PKEY *pkey; | |
6b7be581 | 1650 | const EVP_MD *md = NULL; |
d02b48c6 RE |
1651 | unsigned char *p,*d; |
1652 | int al,i; | |
1653 | unsigned long type; | |
1654 | int n; | |
1655 | CERT *cert; | |
1656 | BIGNUM *r[4]; | |
1657 | int nr[4],kn; | |
1658 | BUF_MEM *buf; | |
1659 | EVP_MD_CTX md_ctx; | |
1660 | ||
dbad1690 | 1661 | EVP_MD_CTX_init(&md_ctx); |
d02b48c6 RE |
1662 | if (s->state == SSL3_ST_SW_KEY_EXCH_A) |
1663 | { | |
52b8dad8 | 1664 | type=s->s3->tmp.new_cipher->algorithm_mkey; |
b56bce4f | 1665 | cert=s->cert; |
d02b48c6 RE |
1666 | |
1667 | buf=s->init_buf; | |
1668 | ||
1669 | r[0]=r[1]=r[2]=r[3]=NULL; | |
1670 | n=0; | |
bc36ee62 | 1671 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
1672 | if (type & SSL_kRSA) |
1673 | { | |
1674 | rsa=cert->rsa_tmp; | |
ca8e5b9b | 1675 | if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL)) |
d02b48c6 | 1676 | { |
ca8e5b9b | 1677 | rsa=s->cert->rsa_tmp_cb(s, |
f415fa32 | 1678 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), |
60e31c3a | 1679 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); |
fbb41ae0 DSH |
1680 | if(rsa == NULL) |
1681 | { | |
1682 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1683 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY); | |
1684 | goto f_err; | |
1685 | } | |
6ac4e8bd | 1686 | RSA_up_ref(rsa); |
d02b48c6 RE |
1687 | cert->rsa_tmp=rsa; |
1688 | } | |
1689 | if (rsa == NULL) | |
1690 | { | |
58964a49 | 1691 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1692 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY); |
1693 | goto f_err; | |
1694 | } | |
1695 | r[0]=rsa->n; | |
1696 | r[1]=rsa->e; | |
1697 | s->s3->tmp.use_rsa_tmp=1; | |
1698 | } | |
1699 | else | |
1700 | #endif | |
bc36ee62 | 1701 | #ifndef OPENSSL_NO_DH |
5a21cadb | 1702 | if (type & SSL_kDHE) |
d02b48c6 | 1703 | { |
09599b52 DSH |
1704 | if (s->cert->dh_tmp_auto) |
1705 | { | |
1706 | dhp = ssl_get_auto_dh(s); | |
1707 | if (dhp == NULL) | |
1708 | { | |
1709 | al=SSL_AD_INTERNAL_ERROR; | |
1710 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); | |
1711 | goto f_err; | |
1712 | } | |
1713 | } | |
1714 | else | |
1715 | dhp=cert->dh_tmp; | |
ca8e5b9b BM |
1716 | if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL)) |
1717 | dhp=s->cert->dh_tmp_cb(s, | |
2c05c494 | 1718 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), |
60e31c3a | 1719 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); |
d02b48c6 RE |
1720 | if (dhp == NULL) |
1721 | { | |
58964a49 | 1722 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1723 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
1724 | goto f_err; | |
1725 | } | |
b362ccab DSH |
1726 | if (!ssl_security(s, SSL_SECOP_TMP_DH, |
1727 | DH_security_bits(dhp), 0, dhp)) | |
1728 | { | |
1729 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1730 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_DH_KEY_TOO_SMALL); | |
1731 | goto f_err; | |
1732 | } | |
a87030a1 BM |
1733 | if (s->s3->tmp.dh != NULL) |
1734 | { | |
5277d7cb | 1735 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
a87030a1 BM |
1736 | goto err; |
1737 | } | |
1738 | ||
09599b52 DSH |
1739 | if (s->cert->dh_tmp_auto) |
1740 | dh = dhp; | |
1741 | else if ((dh=DHparams_dup(dhp)) == NULL) | |
d02b48c6 RE |
1742 | { |
1743 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1744 | goto err; | |
1745 | } | |
1746 | ||
1747 | s->s3->tmp.dh=dh; | |
6fa89f94 BL |
1748 | if ((dhp->pub_key == NULL || |
1749 | dhp->priv_key == NULL || | |
1750 | (s->options & SSL_OP_SINGLE_DH_USE))) | |
d02b48c6 | 1751 | { |
6fa89f94 BL |
1752 | if(!DH_generate_key(dh)) |
1753 | { | |
1754 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, | |
1755 | ERR_R_DH_LIB); | |
1756 | goto err; | |
1757 | } | |
d02b48c6 RE |
1758 | } |
1759 | else | |
1760 | { | |
1761 | dh->pub_key=BN_dup(dhp->pub_key); | |
1762 | dh->priv_key=BN_dup(dhp->priv_key); | |
1763 | if ((dh->pub_key == NULL) || | |
1764 | (dh->priv_key == NULL)) | |
1765 | { | |
1766 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1767 | goto err; | |
1768 | } | |
1769 | } | |
1770 | r[0]=dh->p; | |
1771 | r[1]=dh->g; | |
1772 | r[2]=dh->pub_key; | |
1773 | } | |
1774 | else | |
1775 | #endif | |
ea262260 | 1776 | #ifndef OPENSSL_NO_ECDH |
4082fea8 | 1777 | if (type & SSL_kECDHE) |
ea262260 | 1778 | { |
9dd84053 NL |
1779 | const EC_GROUP *group; |
1780 | ||
ea262260 | 1781 | ecdhp=cert->ecdh_tmp; |
a4352630 DSH |
1782 | if (s->cert->ecdh_tmp_auto) |
1783 | { | |
2ea80354 DSH |
1784 | /* Get NID of appropriate shared curve */ |
1785 | int nid = tls1_shared_curve(s, -2); | |
a4352630 DSH |
1786 | if (nid != NID_undef) |
1787 | ecdhp = EC_KEY_new_by_curve_name(nid); | |
1788 | } | |
1789 | else if ((ecdhp == NULL) && s->cert->ecdh_tmp_cb) | |
ea262260 BM |
1790 | { |
1791 | ecdhp=s->cert->ecdh_tmp_cb(s, | |
1792 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), | |
1793 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); | |
1794 | } | |
1795 | if (ecdhp == NULL) | |
1796 | { | |
1797 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1798 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); | |
1799 | goto f_err; | |
1800 | } | |
1801 | ||
1802 | if (s->s3->tmp.ecdh != NULL) | |
1803 | { | |
ea262260 BM |
1804 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
1805 | goto err; | |
1806 | } | |
1807 | ||
1808 | /* Duplicate the ECDH structure. */ | |
1809 | if (ecdhp == NULL) | |
1810 | { | |
1811 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1812 | goto err; | |
1813 | } | |
a4352630 DSH |
1814 | if (s->cert->ecdh_tmp_auto) |
1815 | ecdh = ecdhp; | |
1816 | else if ((ecdh = EC_KEY_dup(ecdhp)) == NULL) | |
ea262260 | 1817 | { |
aa4ce731 | 1818 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); |
ea262260 BM |
1819 | goto err; |
1820 | } | |
ea262260 BM |
1821 | |
1822 | s->s3->tmp.ecdh=ecdh; | |
9dd84053 NL |
1823 | if ((EC_KEY_get0_public_key(ecdh) == NULL) || |
1824 | (EC_KEY_get0_private_key(ecdh) == NULL) || | |
ea262260 BM |
1825 | (s->options & SSL_OP_SINGLE_ECDH_USE)) |
1826 | { | |
1827 | if(!EC_KEY_generate_key(ecdh)) | |
1828 | { | |
1829 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1830 | goto err; | |
1831 | } | |
1832 | } | |
1833 | ||
9dd84053 NL |
1834 | if (((group = EC_KEY_get0_group(ecdh)) == NULL) || |
1835 | (EC_KEY_get0_public_key(ecdh) == NULL) || | |
1836 | (EC_KEY_get0_private_key(ecdh) == NULL)) | |
ea262260 BM |
1837 | { |
1838 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1839 | goto err; | |
1840 | } | |
1841 | ||
1842 | if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && | |
9dd84053 | 1843 | (EC_GROUP_get_degree(group) > 163)) |
ea262260 BM |
1844 | { |
1845 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); | |
1846 | goto err; | |
1847 | } | |
1848 | ||
1849 | /* XXX: For now, we only support ephemeral ECDH | |
1850 | * keys over named (not generic) curves. For | |
1851 | * supported named curves, curve_id is non-zero. | |
1852 | */ | |
1853 | if ((curve_id = | |
33273721 | 1854 | tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group))) |
ea262260 BM |
1855 | == 0) |
1856 | { | |
1857 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE); | |
1858 | goto err; | |
1859 | } | |
1860 | ||
1861 | /* Encode the public key. | |
1862 | * First check the size of encoding and | |
1863 | * allocate memory accordingly. | |
1864 | */ | |
9dd84053 NL |
1865 | encodedlen = EC_POINT_point2oct(group, |
1866 | EC_KEY_get0_public_key(ecdh), | |
ea262260 BM |
1867 | POINT_CONVERSION_UNCOMPRESSED, |
1868 | NULL, 0, NULL); | |
1869 | ||
1870 | encodedPoint = (unsigned char *) | |
1871 | OPENSSL_malloc(encodedlen*sizeof(unsigned char)); | |
1872 | bn_ctx = BN_CTX_new(); | |
1873 | if ((encodedPoint == NULL) || (bn_ctx == NULL)) | |
1874 | { | |
1875 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); | |
1876 | goto err; | |
1877 | } | |
1878 | ||
1879 | ||
9dd84053 NL |
1880 | encodedlen = EC_POINT_point2oct(group, |
1881 | EC_KEY_get0_public_key(ecdh), | |
ea262260 BM |
1882 | POINT_CONVERSION_UNCOMPRESSED, |
1883 | encodedPoint, encodedlen, bn_ctx); | |
1884 | ||
1885 | if (encodedlen == 0) | |
1886 | { | |
1887 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1888 | goto err; | |
1889 | } | |
1890 | ||
1891 | BN_CTX_free(bn_ctx); bn_ctx=NULL; | |
1892 | ||
1893 | /* XXX: For now, we only support named (not | |
1894 | * generic) curves in ECDH ephemeral key exchanges. | |
d56349a2 | 1895 | * In this situation, we need four additional bytes |
ea262260 BM |
1896 | * to encode the entire ServerECDHParams |
1897 | * structure. | |
1898 | */ | |
d56349a2 | 1899 | n = 4 + encodedlen; |
ea262260 BM |
1900 | |
1901 | /* We'll generate the serverKeyExchange message | |
1902 | * explicitly so we can set these to NULLs | |
1903 | */ | |
1904 | r[0]=NULL; | |
1905 | r[1]=NULL; | |
1906 | r[2]=NULL; | |
d56349a2 | 1907 | r[3]=NULL; |
ea262260 BM |
1908 | } |
1909 | else | |
1910 | #endif /* !OPENSSL_NO_ECDH */ | |
ddac1974 NL |
1911 | #ifndef OPENSSL_NO_PSK |
1912 | if (type & SSL_kPSK) | |
1913 | { | |
1914 | /* reserve size for record length and PSK identity hint*/ | |
1915 | n+=2+strlen(s->ctx->psk_identity_hint); | |
1916 | } | |
1917 | else | |
1918 | #endif /* !OPENSSL_NO_PSK */ | |
edc032b5 BL |
1919 | #ifndef OPENSSL_NO_SRP |
1920 | if (type & SSL_kSRP) | |
1921 | { | |
1922 | if ((s->srp_ctx.N == NULL) || | |
1923 | (s->srp_ctx.g == NULL) || | |
1924 | (s->srp_ctx.s == NULL) || | |
1925 | (s->srp_ctx.B == NULL)) | |
1926 | { | |
1927 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_SRP_PARAM); | |
1928 | goto err; | |
1929 | } | |
1930 | r[0]=s->srp_ctx.N; | |
1931 | r[1]=s->srp_ctx.g; | |
1932 | r[2]=s->srp_ctx.s; | |
1933 | r[3]=s->srp_ctx.B; | |
1934 | } | |
1935 | else | |
1936 | #endif | |
d02b48c6 | 1937 | { |
58964a49 | 1938 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1939 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); |
1940 | goto f_err; | |
1941 | } | |
73c92dfa | 1942 | for (i=0; i < 4 && r[i] != NULL; i++) |
d02b48c6 RE |
1943 | { |
1944 | nr[i]=BN_num_bytes(r[i]); | |
edc032b5 BL |
1945 | #ifndef OPENSSL_NO_SRP |
1946 | if ((i == 2) && (type & SSL_kSRP)) | |
1947 | n+=1+nr[i]; | |
1948 | else | |
1949 | #endif | |
d02b48c6 RE |
1950 | n+=2+nr[i]; |
1951 | } | |
1952 | ||
9e72d496 | 1953 | if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL|SSL_aSRP)) |
52b8dad8 | 1954 | && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) |
d02b48c6 | 1955 | { |
6b7be581 | 1956 | if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher,&md)) |
d02b48c6 RE |
1957 | == NULL) |
1958 | { | |
58964a49 | 1959 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1960 | goto f_err; |
1961 | } | |
1962 | kn=EVP_PKEY_size(pkey); | |
1963 | } | |
1964 | else | |
1965 | { | |
1966 | pkey=NULL; | |
1967 | kn=0; | |
1968 | } | |
1969 | ||
173e72e6 | 1970 | if (!BUF_MEM_grow_clean(buf,n+SSL_HM_HEADER_LENGTH(s)+kn)) |
d02b48c6 RE |
1971 | { |
1972 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF); | |
1973 | goto err; | |
1974 | } | |
173e72e6 | 1975 | d = p = ssl_handshake_start(s); |
d02b48c6 | 1976 | |
73c92dfa | 1977 | for (i=0; i < 4 && r[i] != NULL; i++) |
d02b48c6 | 1978 | { |
edc032b5 BL |
1979 | #ifndef OPENSSL_NO_SRP |
1980 | if ((i == 2) && (type & SSL_kSRP)) | |
1981 | { | |
1982 | *p = nr[i]; | |
1983 | p++; | |
1984 | } | |
1985 | else | |
1986 | #endif | |
d02b48c6 RE |
1987 | s2n(nr[i],p); |
1988 | BN_bn2bin(r[i],p); | |
1989 | p+=nr[i]; | |
1990 | } | |
1991 | ||
ea262260 | 1992 | #ifndef OPENSSL_NO_ECDH |
4082fea8 | 1993 | if (type & SSL_kECDHE) |
ea262260 BM |
1994 | { |
1995 | /* XXX: For now, we only support named (not generic) curves. | |
1996 | * In this situation, the serverKeyExchange message has: | |
d56349a2 | 1997 | * [1 byte CurveType], [2 byte CurveName] |
ea262260 BM |
1998 | * [1 byte length of encoded point], followed by |
1999 | * the actual encoded point itself | |
2000 | */ | |
2001 | *p = NAMED_CURVE_TYPE; | |
2002 | p += 1; | |
d56349a2 BM |
2003 | *p = 0; |
2004 | p += 1; | |
ea262260 BM |
2005 | *p = curve_id; |
2006 | p += 1; | |
2007 | *p = encodedlen; | |
2008 | p += 1; | |
2009 | memcpy((unsigned char*)p, | |
2010 | (unsigned char *)encodedPoint, | |
2011 | encodedlen); | |
2012 | OPENSSL_free(encodedPoint); | |
4f7533eb | 2013 | encodedPoint = NULL; |
ea262260 BM |
2014 | p += encodedlen; |
2015 | } | |
2016 | #endif | |
2017 | ||
ddac1974 NL |
2018 | #ifndef OPENSSL_NO_PSK |
2019 | if (type & SSL_kPSK) | |
2020 | { | |
2021 | /* copy PSK identity hint */ | |
2022 | s2n(strlen(s->ctx->psk_identity_hint), p); | |
07ef6129 | 2023 | strncpy((char *)p, s->ctx->psk_identity_hint, strlen(s->ctx->psk_identity_hint)); |
ddac1974 NL |
2024 | p+=strlen(s->ctx->psk_identity_hint); |
2025 | } | |
2026 | #endif | |
2027 | ||
d02b48c6 RE |
2028 | /* not anonymous */ |
2029 | if (pkey != NULL) | |
2030 | { | |
2031 | /* n is the length of the params, they start at &(d[4]) | |
2032 | * and p points to the space at the end. */ | |
bc36ee62 | 2033 | #ifndef OPENSSL_NO_RSA |
cbd64894 | 2034 | if (pkey->type == EVP_PKEY_RSA && !SSL_USE_SIGALGS(s)) |
d02b48c6 RE |
2035 | { |
2036 | q=md_buf; | |
2037 | j=0; | |
2038 | for (num=2; num > 0; num--) | |
2039 | { | |
086e32a6 DSH |
2040 | EVP_MD_CTX_set_flags(&md_ctx, |
2041 | EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); | |
70051b1d DSH |
2042 | EVP_DigestInit_ex(&md_ctx,(num == 2) |
2043 | ?s->ctx->md5:s->ctx->sha1, NULL); | |
43982224 DSH |
2044 | EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); |
2045 | EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
173e72e6 | 2046 | EVP_DigestUpdate(&md_ctx,d,n); |
43982224 DSH |
2047 | EVP_DigestFinal_ex(&md_ctx,q, |
2048 | (unsigned int *)&i); | |
d02b48c6 RE |
2049 | q+=i; |
2050 | j+=i; | |
2051 | } | |
1c80019a | 2052 | if (RSA_sign(NID_md5_sha1, md_buf, j, |
ca7fea96 | 2053 | &(p[2]), &u, pkey->pkey.rsa) <= 0) |
d02b48c6 RE |
2054 | { |
2055 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA); | |
2056 | goto err; | |
2057 | } | |
ca7fea96 BL |
2058 | s2n(u,p); |
2059 | n+=u+2; | |
d02b48c6 RE |
2060 | } |
2061 | else | |
2062 | #endif | |
6b7be581 | 2063 | if (md) |
d02b48c6 | 2064 | { |
cbd64894 DSH |
2065 | /* send signature algorithm */ |
2066 | if (SSL_USE_SIGALGS(s)) | |
d02b48c6 | 2067 | { |
6b7be581 DSH |
2068 | if (!tls12_get_sigandhash(p, pkey, md)) |
2069 | { | |
2070 | /* Should never happen */ | |
2071 | al=SSL_AD_INTERNAL_ERROR; | |
2072 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); | |
2073 | goto f_err; | |
2074 | } | |
2075 | p+=2; | |
d02b48c6 | 2076 | } |
a2f9200f DSH |
2077 | #ifdef SSL_DEBUG |
2078 | fprintf(stderr, "Using hash %s\n", | |
2079 | EVP_MD_name(md)); | |
2080 | #endif | |
6b7be581 | 2081 | EVP_SignInit_ex(&md_ctx, md, NULL); |
43982224 DSH |
2082 | EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); |
2083 | EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
173e72e6 | 2084 | EVP_SignUpdate(&md_ctx,d,n); |
43982224 DSH |
2085 | if (!EVP_SignFinal(&md_ctx,&(p[2]), |
2086 | (unsigned int *)&i,pkey)) | |
ea262260 | 2087 | { |
6b7be581 | 2088 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_EVP); |
ea262260 BM |
2089 | goto err; |
2090 | } | |
2091 | s2n(i,p); | |
2092 | n+=i+2; | |
cbd64894 | 2093 | if (SSL_USE_SIGALGS(s)) |
6b7be581 | 2094 | n+= 2; |
ea262260 BM |
2095 | } |
2096 | else | |
d02b48c6 RE |
2097 | { |
2098 | /* Is this error check actually needed? */ | |
58964a49 | 2099 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
2100 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE); |
2101 | goto f_err; | |
2102 | } | |
2103 | } | |
2104 | ||
173e72e6 | 2105 | ssl_set_handshake_header(s, SSL3_MT_SERVER_KEY_EXCHANGE, n); |
d02b48c6 RE |
2106 | } |
2107 | ||
a87030a1 | 2108 | s->state = SSL3_ST_SW_KEY_EXCH_B; |
dbad1690 | 2109 | EVP_MD_CTX_cleanup(&md_ctx); |
173e72e6 | 2110 | return ssl_do_write(s); |
d02b48c6 RE |
2111 | f_err: |
2112 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
2113 | err: | |
ea262260 BM |
2114 | #ifndef OPENSSL_NO_ECDH |
2115 | if (encodedPoint != NULL) OPENSSL_free(encodedPoint); | |
2116 | BN_CTX_free(bn_ctx); | |
2117 | #endif | |
dbad1690 | 2118 | EVP_MD_CTX_cleanup(&md_ctx); |
d02b48c6 RE |
2119 | return(-1); |
2120 | } | |
2121 | ||
36d16f8e | 2122 | int ssl3_send_certificate_request(SSL *s) |
d02b48c6 RE |
2123 | { |
2124 | unsigned char *p,*d; | |
2125 | int i,j,nl,off,n; | |
f73e07cf | 2126 | STACK_OF(X509_NAME) *sk=NULL; |
d02b48c6 RE |
2127 | X509_NAME *name; |
2128 | BUF_MEM *buf; | |
2129 | ||
2130 | if (s->state == SSL3_ST_SW_CERT_REQ_A) | |
2131 | { | |
2132 | buf=s->init_buf; | |
2133 | ||
173e72e6 | 2134 | d=p=ssl_handshake_start(s); |
d02b48c6 RE |
2135 | |
2136 | /* get the list of acceptable cert types */ | |
2137 | p++; | |
2138 | n=ssl3_get_req_cert_type(s,p); | |
2139 | d[0]=n; | |
2140 | p+=n; | |
2141 | n++; | |
2142 | ||
cbd64894 | 2143 | if (SSL_USE_SIGALGS(s)) |
f37f20ff | 2144 | { |
b7bfe69b | 2145 | const unsigned char *psigs; |
b362ccab | 2146 | unsigned char *etmp = p; |
b7bfe69b | 2147 | nl = tls12_get_psigalgs(s, &psigs); |
b362ccab DSH |
2148 | /* Skip over length for now */ |
2149 | p += 2; | |
2150 | nl = tls12_copy_sigalgs(s, p, psigs, nl); | |
2151 | /* Now fill in length */ | |
2152 | s2n(nl, etmp); | |
b7bfe69b | 2153 | p += nl; |
f37f20ff DSH |
2154 | n += nl + 2; |
2155 | } | |
2156 | ||
d02b48c6 RE |
2157 | off=n; |
2158 | p+=2; | |
2159 | n+=2; | |
2160 | ||
2161 | sk=SSL_get_client_CA_list(s); | |
2162 | nl=0; | |
2163 | if (sk != NULL) | |
2164 | { | |
f73e07cf | 2165 | for (i=0; i<sk_X509_NAME_num(sk); i++) |
d02b48c6 | 2166 | { |
f73e07cf | 2167 | name=sk_X509_NAME_value(sk,i); |
d02b48c6 | 2168 | j=i2d_X509_NAME(name,NULL); |
fdeaf55b | 2169 | if (!BUF_MEM_grow_clean(buf,SSL_HM_HEADER_LENGTH(s)+n+j+2)) |
d02b48c6 RE |
2170 | { |
2171 | SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB); | |
2172 | goto err; | |
2173 | } | |
fdeaf55b | 2174 | p = ssl_handshake_start(s) + n; |
58964a49 | 2175 | if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) |
d02b48c6 RE |
2176 | { |
2177 | s2n(j,p); | |
2178 | i2d_X509_NAME(name,&p); | |
2179 | n+=2+j; | |
2180 | nl+=2+j; | |
2181 | } | |
2182 | else | |
2183 | { | |
2184 | d=p; | |
2185 | i2d_X509_NAME(name,&p); | |
2186 | j-=2; s2n(j,d); j+=2; | |
2187 | n+=j; | |
2188 | nl+=j; | |
2189 | } | |
2190 | } | |
2191 | } | |
2192 | /* else no CA names */ | |
173e72e6 | 2193 | p = ssl_handshake_start(s) + off; |
d02b48c6 RE |
2194 | s2n(nl,p); |
2195 | ||
173e72e6 | 2196 | ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE_REQUEST, n); |
d02b48c6 | 2197 | |
de469ef2 | 2198 | #ifdef NETSCAPE_HANG_BUG |
173e72e6 DSH |
2199 | if (!SSL_IS_DTLS(s)) |
2200 | { | |
92d81ba6 DR |
2201 | if (!BUF_MEM_grow_clean(buf, s->init_num + 4)) |
2202 | { | |
2203 | SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB); | |
2204 | goto err; | |
2205 | } | |
173e72e6 DSH |
2206 | p=(unsigned char *)s->init_buf->data + s->init_num; |
2207 | /* do the header */ | |
2208 | *(p++)=SSL3_MT_SERVER_DONE; | |
2209 | *(p++)=0; | |
2210 | *(p++)=0; | |
2211 | *(p++)=0; | |
2212 | s->init_num += 4; | |
2213 | } | |
de469ef2 DSH |
2214 | #endif |
2215 | ||
e59659dc | 2216 | s->state = SSL3_ST_SW_CERT_REQ_B; |
d02b48c6 RE |
2217 | } |
2218 | ||
2219 | /* SSL3_ST_SW_CERT_REQ_B */ | |
173e72e6 | 2220 | return ssl_do_write(s); |
d02b48c6 RE |
2221 | err: |
2222 | return(-1); | |
2223 | } | |
2224 | ||
36d16f8e | 2225 | int ssl3_get_client_key_exchange(SSL *s) |
d02b48c6 RE |
2226 | { |
2227 | int i,al,ok; | |
2228 | long n; | |
52b8dad8 | 2229 | unsigned long alg_k; |
d02b48c6 | 2230 | unsigned char *p; |
bc36ee62 | 2231 | #ifndef OPENSSL_NO_RSA |
d02b48c6 | 2232 | RSA *rsa=NULL; |
d02b48c6 | 2233 | EVP_PKEY *pkey=NULL; |
79df9d62 | 2234 | #endif |
bc36ee62 | 2235 | #ifndef OPENSSL_NO_DH |
58964a49 | 2236 | BIGNUM *pub=NULL; |
0d609395 | 2237 | DH *dh_srvr, *dh_clnt = NULL; |
58964a49 | 2238 | #endif |
bc36ee62 | 2239 | #ifndef OPENSSL_NO_KRB5 |
52b8dad8 | 2240 | KSSL_ERR kssl_err; |
bc36ee62 | 2241 | #endif /* OPENSSL_NO_KRB5 */ |
d02b48c6 | 2242 | |
ea262260 BM |
2243 | #ifndef OPENSSL_NO_ECDH |
2244 | EC_KEY *srvr_ecdh = NULL; | |
2245 | EVP_PKEY *clnt_pub_pkey = NULL; | |
2246 | EC_POINT *clnt_ecpoint = NULL; | |
2247 | BN_CTX *bn_ctx = NULL; | |
2248 | #endif | |
2249 | ||
36d16f8e | 2250 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
2251 | SSL3_ST_SR_KEY_EXCH_A, |
2252 | SSL3_ST_SR_KEY_EXCH_B, | |
2253 | SSL3_MT_CLIENT_KEY_EXCHANGE, | |
73969585 | 2254 | 2048, /* ??? */ |
d02b48c6 RE |
2255 | &ok); |
2256 | ||
2257 | if (!ok) return((int)n); | |
48948d53 | 2258 | p=(unsigned char *)s->init_msg; |
d02b48c6 | 2259 | |
52b8dad8 | 2260 | alg_k=s->s3->tmp.new_cipher->algorithm_mkey; |
d02b48c6 | 2261 | |
bc36ee62 | 2262 | #ifndef OPENSSL_NO_RSA |
52b8dad8 | 2263 | if (alg_k & SSL_kRSA) |
d02b48c6 | 2264 | { |
adb46dbc | 2265 | unsigned char rand_premaster_secret[SSL_MAX_MASTER_KEY_LENGTH]; |
455b65df EK |
2266 | int decrypt_len; |
2267 | unsigned char decrypt_good, version_good; | |
adb46dbc | 2268 | |
d02b48c6 RE |
2269 | /* FIX THIS UP EAY EAY EAY EAY */ |
2270 | if (s->s3->tmp.use_rsa_tmp) | |
2271 | { | |
b56bce4f | 2272 | if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL)) |
ca8e5b9b | 2273 | rsa=s->cert->rsa_tmp; |
d02b48c6 RE |
2274 | /* Don't do a callback because rsa_tmp should |
2275 | * be sent already */ | |
2276 | if (rsa == NULL) | |
2277 | { | |
58964a49 | 2278 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
2279 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY); |
2280 | goto f_err; | |
2281 | ||
2282 | } | |
2283 | } | |
2284 | else | |
2285 | { | |
2286 | pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey; | |
2287 | if ( (pkey == NULL) || | |
2288 | (pkey->type != EVP_PKEY_RSA) || | |
2289 | (pkey->pkey.rsa == NULL)) | |
2290 | { | |
58964a49 | 2291 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
2292 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE); |
2293 | goto f_err; | |
2294 | } | |
2295 | rsa=pkey->pkey.rsa; | |
2296 | } | |
2297 | ||
7432d073 | 2298 | /* TLS and [incidentally] DTLS{0xFEFF} */ |
8711efb4 | 2299 | if (s->version > SSL3_VERSION && s->version != DTLS1_BAD_VER) |
58964a49 RE |
2300 | { |
2301 | n2s(p,i); | |
2302 | if (n != i+2) | |
2303 | { | |
2304 | if (!(s->options & SSL_OP_TLS_D5_BUG)) | |
2305 | { | |
2306 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG); | |
2307 | goto err; | |
2308 | } | |
2309 | else | |
2310 | p-=2; | |
2311 | } | |
2312 | else | |
2313 | n=i; | |
2314 | } | |
2315 | ||
adb46dbc AL |
2316 | /* We must not leak whether a decryption failure occurs because |
2317 | * of Bleichenbacher's attack on PKCS #1 v1.5 RSA padding (see | |
2318 | * RFC 2246, section 7.4.7.1). The code follows that advice of | |
2319 | * the TLS RFC and generates a random premaster secret for the | |
2320 | * case that the decrypt fails. See | |
2321 | * https://tools.ietf.org/html/rfc5246#section-7.4.7.1 */ | |
58964a49 | 2322 | |
adb46dbc AL |
2323 | /* should be RAND_bytes, but we cannot work around a failure. */ |
2324 | if (RAND_pseudo_bytes(rand_premaster_secret, | |
2325 | sizeof(rand_premaster_secret)) <= 0) | |
2326 | goto err; | |
2327 | decrypt_len = RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING); | |
2328 | ERR_clear_error(); | |
2329 | ||
2330 | /* decrypt_len should be SSL_MAX_MASTER_KEY_LENGTH. | |
455b65df EK |
2331 | * decrypt_good will be 0xff if so and zero otherwise. */ |
2332 | decrypt_good = constant_time_eq_int_8(decrypt_len, SSL_MAX_MASTER_KEY_LENGTH); | |
adb46dbc AL |
2333 | |
2334 | /* If the version in the decrypted pre-master secret is correct | |
455b65df EK |
2335 | * then version_good will be 0xff, otherwise it'll be zero. |
2336 | * The Klima-Pokorny-Rosa extension of Bleichenbacher's attack | |
adb46dbc AL |
2337 | * (http://eprint.iacr.org/2003/052/) exploits the version |
2338 | * number check as a "bad version oracle". Thus version checks | |
2339 | * are done in constant time and are treated like any other | |
2340 | * decryption error. */ | |
455b65df EK |
2341 | version_good = constant_time_eq_8(p[0], (unsigned)(s->client_version>>8)); |
2342 | version_good &= constant_time_eq_8(p[1], (unsigned)(s->client_version&0xff)); | |
adb46dbc AL |
2343 | |
2344 | /* The premaster secret must contain the same version number as | |
2345 | * the ClientHello to detect version rollback attacks | |
2346 | * (strangely, the protocol does not offer such protection for | |
2347 | * DH ciphersuites). However, buggy clients exist that send the | |
2348 | * negotiated protocol version instead if the server does not | |
2349 | * support the requested protocol version. If | |
2350 | * SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */ | |
2351 | if (s->options & SSL_OP_TLS_ROLLBACK_BUG) | |
d02b48c6 | 2352 | { |
455b65df EK |
2353 | unsigned char workaround_good; |
2354 | workaround_good = constant_time_eq_8(p[0], (unsigned)(s->version>>8)); | |
2355 | workaround_good &= constant_time_eq_8(p[1], (unsigned)(s->version&0xff)); | |
2356 | version_good |= workaround_good; | |
d02b48c6 RE |
2357 | } |
2358 | ||
455b65df EK |
2359 | /* Both decryption and version must be good for decrypt_good |
2360 | * to remain non-zero (0xff). */ | |
2361 | decrypt_good &= version_good; | |
adb46dbc AL |
2362 | |
2363 | /* Now copy rand_premaster_secret over p using | |
2364 | * decrypt_good_mask. */ | |
2365 | for (i = 0; i < (int) sizeof(rand_premaster_secret); i++) | |
d02b48c6 | 2366 | { |
455b65df EK |
2367 | p[i] = constant_time_select_8(decrypt_good, p[i], |
2368 | rand_premaster_secret[i]); | |
d02b48c6 | 2369 | } |
d02b48c6 RE |
2370 | |
2371 | s->session->master_key_length= | |
58964a49 | 2372 | s->method->ssl3_enc->generate_master_secret(s, |
d02b48c6 RE |
2373 | s->session->master_key, |
2374 | p,i); | |
43d60164 | 2375 | OPENSSL_cleanse(p,i); |
d02b48c6 RE |
2376 | } |
2377 | else | |
4c5fac4a | 2378 | #endif |
bc36ee62 | 2379 | #ifndef OPENSSL_NO_DH |
5a21cadb | 2380 | if (alg_k & (SSL_kDHE|SSL_kDHr|SSL_kDHd)) |
d02b48c6 | 2381 | { |
0d609395 DSH |
2382 | int idx = -1; |
2383 | EVP_PKEY *skey = NULL; | |
2384 | if (n) | |
2385 | n2s(p,i); | |
de2b5b74 DSH |
2386 | else |
2387 | i = 0; | |
0d609395 | 2388 | if (n && n != i+2) |
d02b48c6 | 2389 | { |
58964a49 | 2390 | if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG)) |
d02b48c6 RE |
2391 | { |
2392 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG); | |
2393 | goto err; | |
2394 | } | |
2395 | else | |
2396 | { | |
2397 | p-=2; | |
2398 | i=(int)n; | |
2399 | } | |
2400 | } | |
0d609395 DSH |
2401 | if (alg_k & SSL_kDHr) |
2402 | idx = SSL_PKEY_DH_RSA; | |
2403 | else if (alg_k & SSL_kDHd) | |
2404 | idx = SSL_PKEY_DH_DSA; | |
2405 | if (idx >= 0) | |
2406 | { | |
2407 | skey = s->cert->pkeys[idx].privatekey; | |
2408 | if ((skey == NULL) || | |
2409 | (skey->type != EVP_PKEY_DH) || | |
2410 | (skey->pkey.dh == NULL)) | |
2411 | { | |
2412 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2413 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE); | |
2414 | goto f_err; | |
2415 | } | |
2416 | dh_srvr = skey->pkey.dh; | |
2417 | } | |
2418 | else if (s->s3->tmp.dh == NULL) | |
d02b48c6 | 2419 | { |
58964a49 | 2420 | al=SSL_AD_HANDSHAKE_FAILURE; |
0d609395 | 2421 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
d02b48c6 RE |
2422 | goto f_err; |
2423 | } | |
2424 | else | |
0d609395 DSH |
2425 | dh_srvr=s->s3->tmp.dh; |
2426 | ||
2427 | if (n == 0L) | |
d02b48c6 | 2428 | { |
0d609395 DSH |
2429 | /* Get pubkey from cert */ |
2430 | EVP_PKEY *clkey=X509_get_pubkey(s->session->peer); | |
2431 | if (clkey) | |
2432 | { | |
2433 | if (EVP_PKEY_cmp_parameters(clkey, skey) == 1) | |
2434 | dh_clnt = EVP_PKEY_get1_DH(clkey); | |
8e1dc4d7 | 2435 | } |
0d609395 | 2436 | if (dh_clnt == NULL) |
d02b48c6 | 2437 | { |
58964a49 | 2438 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
2439 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
2440 | goto f_err; | |
2441 | } | |
0d609395 DSH |
2442 | EVP_PKEY_free(clkey); |
2443 | pub = dh_clnt->pub_key; | |
d02b48c6 | 2444 | } |
0d609395 DSH |
2445 | else |
2446 | pub=BN_bin2bn(p,i,NULL); | |
d02b48c6 RE |
2447 | if (pub == NULL) |
2448 | { | |
2449 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB); | |
2450 | goto err; | |
2451 | } | |
58964a49 | 2452 | |
d02b48c6 RE |
2453 | i=DH_compute_key(p,pub,dh_srvr); |
2454 | ||
2455 | if (i <= 0) | |
2456 | { | |
2457 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); | |
25536ea6 | 2458 | BN_clear_free(pub); |
d02b48c6 RE |
2459 | goto err; |
2460 | } | |
2461 | ||
2462 | DH_free(s->s3->tmp.dh); | |
2463 | s->s3->tmp.dh=NULL; | |
0d609395 DSH |
2464 | if (dh_clnt) |
2465 | DH_free(dh_clnt); | |
2466 | else | |
2467 | BN_clear_free(pub); | |
d02b48c6 RE |
2468 | pub=NULL; |
2469 | s->session->master_key_length= | |
58964a49 | 2470 | s->method->ssl3_enc->generate_master_secret(s, |
d02b48c6 | 2471 | s->session->master_key,p,i); |
43d60164 | 2472 | OPENSSL_cleanse(p,i); |
0d609395 DSH |
2473 | if (dh_clnt) |
2474 | return 2; | |
d02b48c6 RE |
2475 | } |
2476 | else | |
2477 | #endif | |
bc36ee62 | 2478 | #ifndef OPENSSL_NO_KRB5 |
52b8dad8 BM |
2479 | if (alg_k & SSL_kKRB5) |
2480 | { | |
2481 | krb5_error_code krb5rc; | |
2a1ef754 RL |
2482 | krb5_data enc_ticket; |
2483 | krb5_data authenticator; | |
2484 | krb5_data enc_pms; | |
52b8dad8 | 2485 | KSSL_CTX *kssl_ctx = s->kssl_ctx; |
2a1ef754 | 2486 | EVP_CIPHER_CTX ciph_ctx; |
ef236ec3 | 2487 | const EVP_CIPHER *enc = NULL; |
2a1ef754 | 2488 | unsigned char iv[EVP_MAX_IV_LENGTH]; |
acdf4afb | 2489 | unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH |
52b8dad8 BM |
2490 | + EVP_MAX_BLOCK_LENGTH]; |
2491 | int padl, outl; | |
2a1ef754 RL |
2492 | krb5_timestamp authtime = 0; |
2493 | krb5_ticket_times ttimes; | |
f9b3bff6 | 2494 | |
de941e28 DSH |
2495 | EVP_CIPHER_CTX_init(&ciph_ctx); |
2496 | ||
52b8dad8 | 2497 | if (!kssl_ctx) kssl_ctx = kssl_ctx_new(); |
2a1ef754 RL |
2498 | |
2499 | n2s(p,i); | |
2500 | enc_ticket.length = i; | |
9e5790ce | 2501 | |
ef236ec3 | 2502 | if (n < (long)(enc_ticket.length + 6)) |
9e5790ce NL |
2503 | { |
2504 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2505 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2506 | goto err; | |
2507 | } | |
2508 | ||
0b4c91c0 | 2509 | enc_ticket.data = (char *)p; |
2a1ef754 RL |
2510 | p+=enc_ticket.length; |
2511 | ||
2512 | n2s(p,i); | |
2513 | authenticator.length = i; | |
9e5790ce | 2514 | |
ef236ec3 | 2515 | if (n < (long)(enc_ticket.length + authenticator.length + 6)) |
9e5790ce NL |
2516 | { |
2517 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2518 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2519 | goto err; | |
2520 | } | |
2521 | ||
0b4c91c0 | 2522 | authenticator.data = (char *)p; |
2a1ef754 RL |
2523 | p+=authenticator.length; |
2524 | ||
2525 | n2s(p,i); | |
2526 | enc_pms.length = i; | |
0b4c91c0 | 2527 | enc_pms.data = (char *)p; |
2a1ef754 RL |
2528 | p+=enc_pms.length; |
2529 | ||
c046fffa LJ |
2530 | /* Note that the length is checked again below, |
2531 | ** after decryption | |
2532 | */ | |
dd7ab82e | 2533 | if(enc_pms.length > sizeof pms) |
c046fffa LJ |
2534 | { |
2535 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2536 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2537 | goto err; | |
2538 | } | |
2539 | ||
0858b71b DSH |
2540 | if (n != (long)(enc_ticket.length + authenticator.length + |
2541 | enc_pms.length + 6)) | |
2a1ef754 RL |
2542 | { |
2543 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2544 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2545 | goto err; | |
2546 | } | |
2547 | ||
52b8dad8 | 2548 | if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes, |
2a1ef754 | 2549 | &kssl_err)) != 0) |
52b8dad8 | 2550 | { |
f9b3bff6 | 2551 | #ifdef KSSL_DEBUG |
52b8dad8 BM |
2552 | printf("kssl_sget_tkt rtn %d [%d]\n", |
2553 | krb5rc, kssl_err.reason); | |
2554 | if (kssl_err.text) | |
2555 | printf("kssl_err text= %s\n", kssl_err.text); | |
f9b3bff6 | 2556 | #endif /* KSSL_DEBUG */ |
52b8dad8 BM |
2557 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2558 | kssl_err.reason); | |
2559 | goto err; | |
2560 | } | |
f9b3bff6 | 2561 | |
2a1ef754 RL |
2562 | /* Note: no authenticator is not considered an error, |
2563 | ** but will return authtime == 0. | |
2564 | */ | |
2565 | if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator, | |
2566 | &authtime, &kssl_err)) != 0) | |
2567 | { | |
2568 | #ifdef KSSL_DEBUG | |
52b8dad8 BM |
2569 | printf("kssl_check_authent rtn %d [%d]\n", |
2570 | krb5rc, kssl_err.reason); | |
2571 | if (kssl_err.text) | |
2572 | printf("kssl_err text= %s\n", kssl_err.text); | |
2a1ef754 | 2573 | #endif /* KSSL_DEBUG */ |
52b8dad8 BM |
2574 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2575 | kssl_err.reason); | |
2576 | goto err; | |
2a1ef754 RL |
2577 | } |
2578 | ||
2579 | if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0) | |
2580 | { | |
aa4ce731 | 2581 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, krb5rc); |
52b8dad8 | 2582 | goto err; |
2a1ef754 RL |
2583 | } |
2584 | ||
f9b3bff6 | 2585 | #ifdef KSSL_DEBUG |
52b8dad8 | 2586 | kssl_ctx_show(kssl_ctx); |
f9b3bff6 RL |
2587 | #endif /* KSSL_DEBUG */ |
2588 | ||
2a1ef754 | 2589 | enc = kssl_map_enc(kssl_ctx->enctype); |
52b8dad8 BM |
2590 | if (enc == NULL) |
2591 | goto err; | |
882e8912 | 2592 | |
54a656ef | 2593 | memset(iv, 0, sizeof iv); /* per RFC 1510 */ |
2a1ef754 | 2594 | |
db6a87d8 | 2595 | if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv)) |
acdf4afb RL |
2596 | { |
2597 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2598 | SSL_R_DECRYPTION_FAILED); | |
2599 | goto err; | |
2600 | } | |
2601 | if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl, | |
0b4c91c0 | 2602 | (unsigned char *)enc_pms.data, enc_pms.length)) |
acdf4afb RL |
2603 | { |
2604 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2605 | SSL_R_DECRYPTION_FAILED); | |
2606 | goto err; | |
2607 | } | |
2a1ef754 RL |
2608 | if (outl > SSL_MAX_MASTER_KEY_LENGTH) |
2609 | { | |
2610 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2611 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2612 | goto err; | |
2613 | } | |
581f1c84 | 2614 | if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl)) |
acdf4afb RL |
2615 | { |
2616 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2617 | SSL_R_DECRYPTION_FAILED); | |
2618 | goto err; | |
2619 | } | |
2a1ef754 RL |
2620 | outl += padl; |
2621 | if (outl > SSL_MAX_MASTER_KEY_LENGTH) | |
2622 | { | |
2623 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2624 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2625 | goto err; | |
2626 | } | |
c1ca9d32 | 2627 | if (!((pms[0] == (s->client_version>>8)) && (pms[1] == (s->client_version & 0xff)))) |
cbb92dfa RL |
2628 | { |
2629 | /* The premaster secret must contain the same version number as the | |
2630 | * ClientHello to detect version rollback attacks (strangely, the | |
2631 | * protocol does not offer such protection for DH ciphersuites). | |
2632 | * However, buggy clients exist that send random bytes instead of | |
2633 | * the protocol version. | |
2634 | * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. | |
2635 | * (Perhaps we should have a separate BUG value for the Kerberos cipher) | |
2636 | */ | |
c1ca9d32 | 2637 | if (!(s->options & SSL_OP_TLS_ROLLBACK_BUG)) |
52b8dad8 | 2638 | { |
cbb92dfa RL |
2639 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2640 | SSL_AD_DECODE_ERROR); | |
2641 | goto err; | |
2642 | } | |
2643 | } | |
2644 | ||
2a1ef754 RL |
2645 | EVP_CIPHER_CTX_cleanup(&ciph_ctx); |
2646 | ||
52b8dad8 BM |
2647 | s->session->master_key_length= |
2648 | s->method->ssl3_enc->generate_master_secret(s, | |
2649 | s->session->master_key, pms, outl); | |
2a1ef754 | 2650 | |
52b8dad8 BM |
2651 | if (kssl_ctx->client_princ) |
2652 | { | |
2653 | size_t len = strlen(kssl_ctx->client_princ); | |
2654 | if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH ) | |
2655 | { | |
2656 | s->session->krb5_client_princ_len = len; | |
2657 | memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len); | |
2658 | } | |
2659 | } | |
882e8912 RL |
2660 | |
2661 | ||
52b8dad8 | 2662 | /* Was doing kssl_ctx_free() here, |
2a1ef754 | 2663 | ** but it caused problems for apache. |
52b8dad8 BM |
2664 | ** kssl_ctx = kssl_ctx_free(kssl_ctx); |
2665 | ** if (s->kssl_ctx) s->kssl_ctx = NULL; | |
2666 | */ | |
2667 | } | |
f9b3bff6 | 2668 | else |
bc36ee62 | 2669 | #endif /* OPENSSL_NO_KRB5 */ |
ea262260 BM |
2670 | |
2671 | #ifndef OPENSSL_NO_ECDH | |
4082fea8 | 2672 | if (alg_k & (SSL_kECDHE|SSL_kECDHr|SSL_kECDHe)) |
ea262260 BM |
2673 | { |
2674 | int ret = 1; | |
968766ca | 2675 | int field_size = 0; |
9dd84053 NL |
2676 | const EC_KEY *tkey; |
2677 | const EC_GROUP *group; | |
2678 | const BIGNUM *priv_key; | |
ea262260 | 2679 | |
52b8dad8 | 2680 | /* initialize structures for server's ECDH key pair */ |
ea262260 BM |
2681 | if ((srvr_ecdh = EC_KEY_new()) == NULL) |
2682 | { | |
52b8dad8 | 2683 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
ea262260 | 2684 | ERR_R_MALLOC_FAILURE); |
52b8dad8 | 2685 | goto err; |
ea262260 BM |
2686 | } |
2687 | ||
2688 | /* Let's get server private key and group information */ | |
52b8dad8 | 2689 | if (alg_k & (SSL_kECDHr|SSL_kECDHe)) |
ea262260 | 2690 | { |
52b8dad8 | 2691 | /* use the certificate */ |
feaaf1db | 2692 | tkey = s->cert->pkeys[SSL_PKEY_ECC].privatekey->pkey.ec; |
ea262260 BM |
2693 | } |
2694 | else | |
2695 | { | |
2696 | /* use the ephermeral values we saved when | |
2697 | * generating the ServerKeyExchange msg. | |
2698 | */ | |
9dd84053 NL |
2699 | tkey = s->s3->tmp.ecdh; |
2700 | } | |
2701 | ||
2702 | group = EC_KEY_get0_group(tkey); | |
2703 | priv_key = EC_KEY_get0_private_key(tkey); | |
2704 | ||
2705 | if (!EC_KEY_set_group(srvr_ecdh, group) || | |
2706 | !EC_KEY_set_private_key(srvr_ecdh, priv_key)) | |
2707 | { | |
2708 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2709 | ERR_R_EC_LIB); | |
2710 | goto err; | |
ea262260 BM |
2711 | } |
2712 | ||
2713 | /* Let's get client's public key */ | |
9dd84053 | 2714 | if ((clnt_ecpoint = EC_POINT_new(group)) == NULL) |
ea262260 BM |
2715 | { |
2716 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2717 | ERR_R_MALLOC_FAILURE); | |
2718 | goto err; | |
2719 | } | |
2720 | ||
52b8dad8 BM |
2721 | if (n == 0L) |
2722 | { | |
ea262260 BM |
2723 | /* Client Publickey was in Client Certificate */ |
2724 | ||
4082fea8 | 2725 | if (alg_k & SSL_kECDHE) |
ea262260 BM |
2726 | { |
2727 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2728 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); | |
2729 | goto f_err; | |
2730 | } | |
52b8dad8 | 2731 | if (((clnt_pub_pkey=X509_get_pubkey(s->session->peer)) |
ea262260 | 2732 | == NULL) || |
5488bb61 | 2733 | (clnt_pub_pkey->type != EVP_PKEY_EC)) |
52b8dad8 | 2734 | { |
ea262260 BM |
2735 | /* XXX: For now, we do not support client |
2736 | * authentication using ECDH certificates | |
2737 | * so this branch (n == 0L) of the code is | |
2738 | * never executed. When that support is | |
2739 | * added, we ought to ensure the key | |
2740 | * received in the certificate is | |
2741 | * authorized for key agreement. | |
2742 | * ECDH_compute_key implicitly checks that | |
2743 | * the two ECDH shares are for the same | |
2744 | * group. | |
2745 | */ | |
52b8dad8 BM |
2746 | al=SSL_AD_HANDSHAKE_FAILURE; |
2747 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
ea262260 | 2748 | SSL_R_UNABLE_TO_DECODE_ECDH_CERTS); |
52b8dad8 BM |
2749 | goto f_err; |
2750 | } | |
ea262260 | 2751 | |
8c5a2bd6 NL |
2752 | if (EC_POINT_copy(clnt_ecpoint, |
2753 | EC_KEY_get0_public_key(clnt_pub_pkey->pkey.ec)) == 0) | |
2754 | { | |
2755 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2756 | ERR_R_EC_LIB); | |
2757 | goto err; | |
2758 | } | |
52b8dad8 BM |
2759 | ret = 2; /* Skip certificate verify processing */ |
2760 | } | |
2761 | else | |
2762 | { | |
ea262260 BM |
2763 | /* Get client's public key from encoded point |
2764 | * in the ClientKeyExchange message. | |
2765 | */ | |
2766 | if ((bn_ctx = BN_CTX_new()) == NULL) | |
2767 | { | |
2768 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2769 | ERR_R_MALLOC_FAILURE); | |
2770 | goto err; | |
2771 | } | |
2772 | ||
52b8dad8 BM |
2773 | /* Get encoded point length */ |
2774 | i = *p; | |
ea262260 | 2775 | p += 1; |
e7928282 BM |
2776 | if (n != 1 + i) |
2777 | { | |
2778 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2779 | ERR_R_EC_LIB); | |
2780 | goto err; | |
2781 | } | |
52b8dad8 | 2782 | if (EC_POINT_oct2point(group, |
ea262260 BM |
2783 | clnt_ecpoint, p, i, bn_ctx) == 0) |
2784 | { | |
2785 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2786 | ERR_R_EC_LIB); | |
2787 | goto err; | |
2788 | } | |
52b8dad8 BM |
2789 | /* p is pointing to somewhere in the buffer |
2790 | * currently, so set it to the start | |
2791 | */ | |
2792 | p=(unsigned char *)s->init_buf->data; | |
2793 | } | |
ea262260 BM |
2794 | |
2795 | /* Compute the shared pre-master secret */ | |
9dd84053 | 2796 | field_size = EC_GROUP_get_degree(group); |
968766ca BM |
2797 | if (field_size <= 0) |
2798 | { | |
2799 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2800 | ERR_R_ECDH_LIB); | |
2801 | goto err; | |
2802 | } | |
d56349a2 | 2803 | i = ECDH_compute_key(p, (field_size+7)/8, clnt_ecpoint, srvr_ecdh, NULL); |
52b8dad8 BM |
2804 | if (i <= 0) |
2805 | { | |
2806 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
ea262260 | 2807 | ERR_R_ECDH_LIB); |
52b8dad8 BM |
2808 | goto err; |
2809 | } | |
ea262260 BM |
2810 | |
2811 | EVP_PKEY_free(clnt_pub_pkey); | |
2812 | EC_POINT_free(clnt_ecpoint); | |
4a94003a | 2813 | EC_KEY_free(srvr_ecdh); |
ea262260 | 2814 | BN_CTX_free(bn_ctx); |
21b25ed4 DSH |
2815 | EC_KEY_free(s->s3->tmp.ecdh); |
2816 | s->s3->tmp.ecdh = NULL; | |
ea262260 BM |
2817 | |
2818 | /* Compute the master secret */ | |
52b8dad8 | 2819 | s->session->master_key_length = s->method->ssl3_enc-> \ |
ea262260 BM |
2820 | generate_master_secret(s, s->session->master_key, p, i); |
2821 | ||
52b8dad8 BM |
2822 | OPENSSL_cleanse(p, i); |
2823 | return (ret); | |
ea262260 BM |
2824 | } |
2825 | else | |
ddac1974 NL |
2826 | #endif |
2827 | #ifndef OPENSSL_NO_PSK | |
52b8dad8 | 2828 | if (alg_k & SSL_kPSK) |
ddac1974 NL |
2829 | { |
2830 | unsigned char *t = NULL; | |
2831 | unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; | |
2832 | unsigned int pre_ms_len = 0, psk_len = 0; | |
2833 | int psk_err = 1; | |
2834 | char tmp_id[PSK_MAX_IDENTITY_LEN+1]; | |
2835 | ||
2836 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2837 | ||
2838 | n2s(p,i); | |
2839 | if (n != i+2) | |
2840 | { | |
2841 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2842 | SSL_R_LENGTH_MISMATCH); | |
2843 | goto psk_err; | |
2844 | } | |
2845 | if (i > PSK_MAX_IDENTITY_LEN) | |
2846 | { | |
2847 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2848 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2849 | goto psk_err; | |
2850 | } | |
2851 | if (s->psk_server_callback == NULL) | |
2852 | { | |
2853 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2854 | SSL_R_PSK_NO_SERVER_CB); | |
2855 | goto psk_err; | |
2856 | } | |
2857 | ||
2858 | /* Create guaranteed NULL-terminated identity | |
2859 | * string for the callback */ | |
2860 | memcpy(tmp_id, p, i); | |
2861 | memset(tmp_id+i, 0, PSK_MAX_IDENTITY_LEN+1-i); | |
2862 | psk_len = s->psk_server_callback(s, tmp_id, | |
2863 | psk_or_pre_ms, sizeof(psk_or_pre_ms)); | |
2864 | OPENSSL_cleanse(tmp_id, PSK_MAX_IDENTITY_LEN+1); | |
2865 | ||
2866 | if (psk_len > PSK_MAX_PSK_LEN) | |
2867 | { | |
2868 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2869 | ERR_R_INTERNAL_ERROR); | |
2870 | goto psk_err; | |
2871 | } | |
2872 | else if (psk_len == 0) | |
2873 | { | |
2874 | /* PSK related to the given identity not found */ | |
2875 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2876 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
2877 | al=SSL_AD_UNKNOWN_PSK_IDENTITY; | |
2878 | goto psk_err; | |
2879 | } | |
2880 | ||
2881 | /* create PSK pre_master_secret */ | |
2882 | pre_ms_len=2+psk_len+2+psk_len; | |
2883 | t = psk_or_pre_ms; | |
2884 | memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); | |
2885 | s2n(psk_len, t); | |
2886 | memset(t, 0, psk_len); | |
2887 | t+=psk_len; | |
2888 | s2n(psk_len, t); | |
2889 | ||
2890 | if (s->session->psk_identity != NULL) | |
2891 | OPENSSL_free(s->session->psk_identity); | |
07ef6129 | 2892 | s->session->psk_identity = BUF_strdup((char *)p); |
ddac1974 NL |
2893 | if (s->session->psk_identity == NULL) |
2894 | { | |
2895 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2896 | ERR_R_MALLOC_FAILURE); | |
2897 | goto psk_err; | |
2898 | } | |
2899 | ||
2900 | if (s->session->psk_identity_hint != NULL) | |
2901 | OPENSSL_free(s->session->psk_identity_hint); | |
2902 | s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); | |
2903 | if (s->ctx->psk_identity_hint != NULL && | |
2904 | s->session->psk_identity_hint == NULL) | |
2905 | { | |
2906 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2907 | ERR_R_MALLOC_FAILURE); | |
2908 | goto psk_err; | |
2909 | } | |
2910 | ||
2911 | s->session->master_key_length= | |
2912 | s->method->ssl3_enc->generate_master_secret(s, | |
2913 | s->session->master_key, psk_or_pre_ms, pre_ms_len); | |
2914 | psk_err = 0; | |
2915 | psk_err: | |
2916 | OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); | |
52b8dad8 BM |
2917 | if (psk_err != 0) |
2918 | goto f_err; | |
ddac1974 NL |
2919 | } |
2920 | else | |
ea262260 | 2921 | #endif |
edc032b5 BL |
2922 | #ifndef OPENSSL_NO_SRP |
2923 | if (alg_k & SSL_kSRP) | |
2924 | { | |
2925 | int param_len; | |
2926 | ||
2927 | n2s(p,i); | |
2928 | param_len=i+2; | |
2929 | if (param_len > n) | |
2930 | { | |
2931 | al=SSL_AD_DECODE_ERROR; | |
23bc7961 | 2932 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_SRP_A_LENGTH); |
edc032b5 BL |
2933 | goto f_err; |
2934 | } | |
2935 | if (!(s->srp_ctx.A=BN_bin2bn(p,i,NULL))) | |
2936 | { | |
23bc7961 | 2937 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_BN_LIB); |
edc032b5 BL |
2938 | goto err; |
2939 | } | |
0989790b DSH |
2940 | if (BN_ucmp(s->srp_ctx.A, s->srp_ctx.N) >= 0 |
2941 | || BN_is_zero(s->srp_ctx.A)) | |
2942 | { | |
2943 | al=SSL_AD_ILLEGAL_PARAMETER; | |
2944 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_SRP_PARAMETERS); | |
2945 | goto f_err; | |
2946 | } | |
edc032b5 BL |
2947 | if (s->session->srp_username != NULL) |
2948 | OPENSSL_free(s->session->srp_username); | |
2949 | s->session->srp_username = BUF_strdup(s->srp_ctx.login); | |
2950 | if (s->session->srp_username == NULL) | |
2951 | { | |
2952 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2953 | ERR_R_MALLOC_FAILURE); | |
2954 | goto err; | |
2955 | } | |
2956 | ||
2957 | if ((s->session->master_key_length = SRP_generate_server_master_secret(s,s->session->master_key))<0) | |
2958 | { | |
23bc7961 | 2959 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); |
edc032b5 BL |
2960 | goto err; |
2961 | } | |
2962 | ||
2963 | p+=i; | |
2964 | } | |
2965 | else | |
2966 | #endif /* OPENSSL_NO_SRP */ | |
0e1dba93 | 2967 | if (alg_k & SSL_kGOST) |
f0288f05 DSH |
2968 | { |
2969 | int ret = 0; | |
0e1dba93 | 2970 | EVP_PKEY_CTX *pkey_ctx; |
e827b587 | 2971 | EVP_PKEY *client_pub_pkey = NULL, *pk = NULL; |
f0288f05 | 2972 | unsigned char premaster_secret[32], *start; |
e827b587 DSH |
2973 | size_t outlen=32, inlen; |
2974 | unsigned long alg_a; | |
4a56d9a2 SL |
2975 | int Ttag, Tclass; |
2976 | long Tlen; | |
0e1dba93 | 2977 | |
f0288f05 | 2978 | /* Get our certificate private key*/ |
e827b587 DSH |
2979 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; |
2980 | if (alg_a & SSL_aGOST94) | |
2981 | pk = s->cert->pkeys[SSL_PKEY_GOST94].privatekey; | |
2982 | else if (alg_a & SSL_aGOST01) | |
2983 | pk = s->cert->pkeys[SSL_PKEY_GOST01].privatekey; | |
2984 | ||
2985 | pkey_ctx = EVP_PKEY_CTX_new(pk,NULL); | |
0e1dba93 | 2986 | EVP_PKEY_decrypt_init(pkey_ctx); |
f0288f05 DSH |
2987 | /* If client certificate is present and is of the same type, maybe |
2988 | * use it for key exchange. Don't mind errors from | |
2989 | * EVP_PKEY_derive_set_peer, because it is completely valid to use | |
2990 | * a client certificate for authorization only. */ | |
2991 | client_pub_pkey = X509_get_pubkey(s->session->peer); | |
2992 | if (client_pub_pkey) | |
2993 | { | |
2994 | if (EVP_PKEY_derive_set_peer(pkey_ctx, client_pub_pkey) <= 0) | |
2995 | ERR_clear_error(); | |
2996 | } | |
0e1dba93 | 2997 | /* Decrypt session key */ |
4a56d9a2 SL |
2998 | if (ASN1_get_object((const unsigned char **)&p, &Tlen, &Ttag, &Tclass, n) != V_ASN1_CONSTRUCTED || |
2999 | Ttag != V_ASN1_SEQUENCE || | |
3000 | Tclass != V_ASN1_UNIVERSAL) | |
f0288f05 DSH |
3001 | { |
3002 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED); | |
3003 | goto gerr; | |
3004 | } | |
4a56d9a2 SL |
3005 | start = p; |
3006 | inlen = Tlen; | |
f0288f05 | 3007 | if (EVP_PKEY_decrypt(pkey_ctx,premaster_secret,&outlen,start,inlen) <=0) |
0e1dba93 DSH |
3008 | |
3009 | { | |
3010 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED); | |
f0288f05 | 3011 | goto gerr; |
0e1dba93 DSH |
3012 | } |
3013 | /* Generate master secret */ | |
0e1dba93 DSH |
3014 | s->session->master_key_length= |
3015 | s->method->ssl3_enc->generate_master_secret(s, | |
3016 | s->session->master_key,premaster_secret,32); | |
f0288f05 DSH |
3017 | /* Check if pubkey from client certificate was used */ |
3018 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) | |
3019 | ret = 2; | |
3020 | else | |
3021 | ret = 1; | |
3022 | gerr: | |
3023 | EVP_PKEY_free(client_pub_pkey); | |
3024 | EVP_PKEY_CTX_free(pkey_ctx); | |
3025 | if (ret) | |
3026 | return ret; | |
3027 | else | |
3028 | goto err; | |
3029 | } | |
0e1dba93 | 3030 | else |
d02b48c6 | 3031 | { |
58964a49 | 3032 | al=SSL_AD_HANDSHAKE_FAILURE; |
2a1ef754 RL |
3033 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
3034 | SSL_R_UNKNOWN_CIPHER_TYPE); | |
d02b48c6 RE |
3035 | goto f_err; |
3036 | } | |
3037 | ||
3038 | return(1); | |
3039 | f_err: | |
3040 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
edc032b5 | 3041 | #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_SRP) |
d02b48c6 | 3042 | err: |
ea262260 | 3043 | #endif |
d020e701 | 3044 | #ifndef OPENSSL_NO_ECDH |
ea262260 BM |
3045 | EVP_PKEY_free(clnt_pub_pkey); |
3046 | EC_POINT_free(clnt_ecpoint); | |
3047 | if (srvr_ecdh != NULL) | |
ea262260 | 3048 | EC_KEY_free(srvr_ecdh); |
ea262260 | 3049 | BN_CTX_free(bn_ctx); |
58964a49 | 3050 | #endif |
d02b48c6 RE |
3051 | return(-1); |
3052 | } | |
3053 | ||
36d16f8e | 3054 | int ssl3_get_cert_verify(SSL *s) |
d02b48c6 RE |
3055 | { |
3056 | EVP_PKEY *pkey=NULL; | |
3057 | unsigned char *p; | |
3058 | int al,ok,ret=0; | |
3059 | long n; | |
3060 | int type=0,i,j; | |
3061 | X509 *peer; | |
f37f20ff DSH |
3062 | const EVP_MD *md = NULL; |
3063 | EVP_MD_CTX mctx; | |
3064 | EVP_MD_CTX_init(&mctx); | |
d02b48c6 | 3065 | |
36d16f8e | 3066 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
3067 | SSL3_ST_SR_CERT_VRFY_A, |
3068 | SSL3_ST_SR_CERT_VRFY_B, | |
3069 | -1, | |
7f6e9578 | 3070 | SSL3_RT_MAX_PLAIN_LENGTH, |
d02b48c6 RE |
3071 | &ok); |
3072 | ||
3073 | if (!ok) return((int)n); | |
3074 | ||
3075 | if (s->session->peer != NULL) | |
3076 | { | |
3077 | peer=s->session->peer; | |
3078 | pkey=X509_get_pubkey(peer); | |
3079 | type=X509_certificate_type(peer,pkey); | |
3080 | } | |
3081 | else | |
3082 | { | |
3083 | peer=NULL; | |
3084 | pkey=NULL; | |
3085 | } | |
3086 | ||
3087 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY) | |
3088 | { | |
3089 | s->s3->tmp.reuse_message=1; | |
3b1fb1a0 | 3090 | if ((peer != NULL) && (type & EVP_PKT_SIGN)) |
d02b48c6 | 3091 | { |
58964a49 | 3092 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 | 3093 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE); |
d02b48c6 RE |
3094 | goto f_err; |
3095 | } | |
3096 | ret=1; | |
3097 | goto end; | |
3098 | } | |
3099 | ||
3100 | if (peer == NULL) | |
3101 | { | |
3102 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED); | |
58964a49 | 3103 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
3104 | goto f_err; |
3105 | } | |
3106 | ||
3107 | if (!(type & EVP_PKT_SIGN)) | |
3108 | { | |
3109 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE); | |
58964a49 | 3110 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
3111 | goto f_err; |
3112 | } | |
3113 | ||
3114 | if (s->s3->change_cipher_spec) | |
3115 | { | |
3116 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY); | |
58964a49 | 3117 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
3118 | goto f_err; |
3119 | } | |
3120 | ||
3121 | /* we now have a signature that we need to verify */ | |
48948d53 | 3122 | p=(unsigned char *)s->init_msg; |
0e1dba93 DSH |
3123 | /* Check for broken implementations of GOST ciphersuites */ |
3124 | /* If key is GOST and n is exactly 64, it is bare | |
3125 | * signature without length field */ | |
3126 | if (n==64 && (pkey->type==NID_id_GostR3410_94 || | |
3127 | pkey->type == NID_id_GostR3410_2001) ) | |
d02b48c6 | 3128 | { |
0e1dba93 DSH |
3129 | i=64; |
3130 | } | |
3131 | else | |
3132 | { | |
cbd64894 | 3133 | if (SSL_USE_SIGALGS(s)) |
f37f20ff | 3134 | { |
ec4a50b3 DSH |
3135 | int rv = tls12_check_peer_sigalg(&md, s, p, pkey); |
3136 | if (rv == -1) | |
f37f20ff | 3137 | { |
ec4a50b3 | 3138 | al = SSL_AD_INTERNAL_ERROR; |
f37f20ff DSH |
3139 | goto f_err; |
3140 | } | |
ec4a50b3 | 3141 | else if (rv == 0) |
f37f20ff | 3142 | { |
ec4a50b3 | 3143 | al = SSL_AD_DECODE_ERROR; |
f37f20ff DSH |
3144 | goto f_err; |
3145 | } | |
3146 | #ifdef SSL_DEBUG | |
3147 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); | |
3148 | #endif | |
3149 | p += 2; | |
3150 | n -= 2; | |
3151 | } | |
0e1dba93 DSH |
3152 | n2s(p,i); |
3153 | n-=2; | |
3154 | if (i > n) | |
3155 | { | |
3156 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH); | |
3157 | al=SSL_AD_DECODE_ERROR; | |
3158 | goto f_err; | |
3159 | } | |
3160 | } | |
d02b48c6 RE |
3161 | j=EVP_PKEY_size(pkey); |
3162 | if ((i > j) || (n > j) || (n <= 0)) | |
3163 | { | |
3164 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE); | |
58964a49 | 3165 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
3166 | goto f_err; |
3167 | } | |
3168 | ||
cbd64894 | 3169 | if (SSL_USE_SIGALGS(s)) |
f37f20ff DSH |
3170 | { |
3171 | long hdatalen = 0; | |
3172 | void *hdata; | |
3173 | hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); | |
3174 | if (hdatalen <= 0) | |
3175 | { | |
3176 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, ERR_R_INTERNAL_ERROR); | |
3177 | al=SSL_AD_INTERNAL_ERROR; | |
3178 | goto f_err; | |
3179 | } | |
3180 | #ifdef SSL_DEBUG | |
3181 | fprintf(stderr, "Using TLS 1.2 with client verify alg %s\n", | |
3182 | EVP_MD_name(md)); | |
3183 | #endif | |
3184 | if (!EVP_VerifyInit_ex(&mctx, md, NULL) | |
3185 | || !EVP_VerifyUpdate(&mctx, hdata, hdatalen)) | |
3186 | { | |
3187 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, ERR_R_EVP_LIB); | |
3188 | al=SSL_AD_INTERNAL_ERROR; | |
3189 | goto f_err; | |
3190 | } | |
3191 | ||
3192 | if (EVP_VerifyFinal(&mctx, p , i, pkey) <= 0) | |
3193 | { | |
3194 | al=SSL_AD_DECRYPT_ERROR; | |
3195 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_SIGNATURE); | |
3196 | goto f_err; | |
3197 | } | |
3198 | } | |
3199 | else | |
bc36ee62 | 3200 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
3201 | if (pkey->type == EVP_PKEY_RSA) |
3202 | { | |
f2d9a32c | 3203 | i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md, |
1c80019a DSH |
3204 | MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i, |
3205 | pkey->pkey.rsa); | |
d02b48c6 RE |
3206 | if (i < 0) |
3207 | { | |
58964a49 | 3208 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
3209 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT); |
3210 | goto f_err; | |
3211 | } | |
1c80019a | 3212 | if (i == 0) |
d02b48c6 | 3213 | { |
58964a49 | 3214 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
3215 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE); |
3216 | goto f_err; | |
3217 | } | |
3218 | } | |
3219 | else | |
3220 | #endif | |
bc36ee62 | 3221 | #ifndef OPENSSL_NO_DSA |
d02b48c6 RE |
3222 | if (pkey->type == EVP_PKEY_DSA) |
3223 | { | |
58964a49 | 3224 | j=DSA_verify(pkey->save_type, |
f2d9a32c | 3225 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]), |
d02b48c6 RE |
3226 | SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa); |
3227 | if (j <= 0) | |
3228 | { | |
3229 | /* bad signature */ | |
58964a49 | 3230 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
3231 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE); |
3232 | goto f_err; | |
3233 | } | |
3234 | } | |
3235 | else | |
ea262260 BM |
3236 | #endif |
3237 | #ifndef OPENSSL_NO_ECDSA | |
5488bb61 | 3238 | if (pkey->type == EVP_PKEY_EC) |
ea262260 BM |
3239 | { |
3240 | j=ECDSA_verify(pkey->save_type, | |
3241 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]), | |
9dd84053 | 3242 | SHA_DIGEST_LENGTH,p,i,pkey->pkey.ec); |
ea262260 BM |
3243 | if (j <= 0) |
3244 | { | |
3245 | /* bad signature */ | |
3246 | al=SSL_AD_DECRYPT_ERROR; | |
3247 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, | |
3248 | SSL_R_BAD_ECDSA_SIGNATURE); | |
3249 | goto f_err; | |
3250 | } | |
3251 | } | |
3252 | else | |
d02b48c6 | 3253 | #endif |
0e1dba93 DSH |
3254 | if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) |
3255 | { unsigned char signature[64]; | |
3256 | int idx; | |
3257 | EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new(pkey,NULL); | |
3258 | EVP_PKEY_verify_init(pctx); | |
3259 | if (i!=64) { | |
3260 | fprintf(stderr,"GOST signature length is %d",i); | |
3261 | } | |
3262 | for (idx=0;idx<64;idx++) { | |
3263 | signature[63-idx]=p[idx]; | |
3264 | } | |
3265 | j=EVP_PKEY_verify(pctx,signature,64,s->s3->tmp.cert_verify_md,32); | |
3266 | EVP_PKEY_CTX_free(pctx); | |
3267 | if (j<=0) | |
3268 | { | |
3269 | al=SSL_AD_DECRYPT_ERROR; | |
3270 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, | |
3271 | SSL_R_BAD_ECDSA_SIGNATURE); | |
3272 | goto f_err; | |
3273 | } | |
3274 | } | |
3275 | else | |
d02b48c6 | 3276 | { |
5277d7cb | 3277 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR); |
58964a49 | 3278 | al=SSL_AD_UNSUPPORTED_CERTIFICATE; |
d02b48c6 RE |
3279 | goto f_err; |
3280 | } | |
3281 | ||
3282 | ||
3283 | ret=1; | |
3284 | if (0) | |
3285 | { | |
3286 | f_err: | |
3287 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
3288 | } | |
3289 | end: | |
f37f20ff DSH |
3290 | if (s->s3->handshake_buffer) |
3291 | { | |
3292 | BIO_free(s->s3->handshake_buffer); | |
3293 | s->s3->handshake_buffer = NULL; | |
3294 | s->s3->flags &= ~TLS1_FLAGS_KEEP_HANDSHAKE; | |
3295 | } | |
3296 | EVP_MD_CTX_cleanup(&mctx); | |
a8236c8c | 3297 | EVP_PKEY_free(pkey); |
d02b48c6 RE |
3298 | return(ret); |
3299 | } | |
3300 | ||
36d16f8e | 3301 | int ssl3_get_client_certificate(SSL *s) |
d02b48c6 RE |
3302 | { |
3303 | int i,ok,al,ret= -1; | |
3304 | X509 *x=NULL; | |
3305 | unsigned long l,nc,llen,n; | |
875a644a RL |
3306 | const unsigned char *p,*q; |
3307 | unsigned char *d; | |
f73e07cf | 3308 | STACK_OF(X509) *sk=NULL; |
d02b48c6 | 3309 | |
36d16f8e | 3310 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
3311 | SSL3_ST_SR_CERT_A, |
3312 | SSL3_ST_SR_CERT_B, | |
3313 | -1, | |
c0f5dd07 | 3314 | s->max_cert_list, |
d02b48c6 RE |
3315 | &ok); |
3316 | ||
3317 | if (!ok) return((int)n); | |
3318 | ||
3319 | if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE) | |
3320 | { | |
3321 | if ( (s->verify_mode & SSL_VERIFY_PEER) && | |
3322 | (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) | |
3323 | { | |
3324 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
58964a49 RE |
3325 | al=SSL_AD_HANDSHAKE_FAILURE; |
3326 | goto f_err; | |
3327 | } | |
47134b78 | 3328 | /* If tls asked for a client cert, the client must return a 0 list */ |
58964a49 RE |
3329 | if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request) |
3330 | { | |
3331 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST); | |
3332 | al=SSL_AD_UNEXPECTED_MESSAGE; | |
d02b48c6 RE |
3333 | goto f_err; |
3334 | } | |
3335 | s->s3->tmp.reuse_message=1; | |
3336 | return(1); | |
3337 | } | |
3338 | ||
3339 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) | |
3340 | { | |
58964a49 | 3341 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
3342 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE); |
3343 | goto f_err; | |
3344 | } | |
875a644a | 3345 | p=d=(unsigned char *)s->init_msg; |
d02b48c6 | 3346 | |
f73e07cf | 3347 | if ((sk=sk_X509_new_null()) == NULL) |
d02b48c6 RE |
3348 | { |
3349 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
3350 | goto err; | |
3351 | } | |
3352 | ||
3353 | n2l3(p,llen); | |
3354 | if (llen+3 != n) | |
3355 | { | |
58964a49 | 3356 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
3357 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH); |
3358 | goto f_err; | |
3359 | } | |
3360 | for (nc=0; nc<llen; ) | |
3361 | { | |
3362 | n2l3(p,l); | |
3363 | if ((l+nc+3) > llen) | |
3364 | { | |
58964a49 | 3365 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
3366 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); |
3367 | goto f_err; | |
3368 | } | |
3369 | ||
3370 | q=p; | |
3371 | x=d2i_X509(NULL,&p,l); | |
3372 | if (x == NULL) | |
3373 | { | |
3374 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB); | |
3375 | goto err; | |
3376 | } | |
3377 | if (p != (q+l)) | |
3378 | { | |
58964a49 | 3379 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
3380 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); |
3381 | goto f_err; | |
3382 | } | |
f73e07cf | 3383 | if (!sk_X509_push(sk,x)) |
d02b48c6 RE |
3384 | { |
3385 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
3386 | goto err; | |
3387 | } | |
3388 | x=NULL; | |
3389 | nc+=l+3; | |
3390 | } | |
3391 | ||
f73e07cf | 3392 | if (sk_X509_num(sk) <= 0) |
d02b48c6 | 3393 | { |
58964a49 RE |
3394 | /* TLS does not mind 0 certs returned */ |
3395 | if (s->version == SSL3_VERSION) | |
3396 | { | |
3397 | al=SSL_AD_HANDSHAKE_FAILURE; | |
3398 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED); | |
3399 | goto f_err; | |
3400 | } | |
3401 | /* Fail for TLS only if we required a certificate */ | |
3402 | else if ((s->verify_mode & SSL_VERIFY_PEER) && | |
3403 | (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) | |
3404 | { | |
3405 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
3406 | al=SSL_AD_HANDSHAKE_FAILURE; | |
3407 | goto f_err; | |
3408 | } | |
f37f20ff DSH |
3409 | /* No client certificate so digest cached records */ |
3410 | if (s->s3->handshake_buffer && !ssl3_digest_cached_records(s)) | |
3411 | { | |
3412 | al=SSL_AD_INTERNAL_ERROR; | |
3413 | goto f_err; | |
3414 | } | |
d02b48c6 | 3415 | } |
58964a49 | 3416 | else |
d02b48c6 | 3417 | { |
b362ccab | 3418 | EVP_PKEY *pkey; |
58964a49 | 3419 | i=ssl_verify_cert_chain(s,sk); |
bab53405 | 3420 | if (i <= 0) |
58964a49 RE |
3421 | { |
3422 | al=ssl_verify_alarm_type(s->verify_result); | |
93c2c9be | 3423 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); |
58964a49 RE |
3424 | goto f_err; |
3425 | } | |
b362ccab DSH |
3426 | if (i > 1) |
3427 | { | |
3428 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, i); | |
3429 | al = SSL_AD_HANDSHAKE_FAILURE; | |
3430 | goto f_err; | |
3431 | } | |
3432 | pkey = X509_get_pubkey(sk_X509_value(sk, 0)); | |
3433 | if (pkey == NULL) | |
3434 | { | |
3435 | al=SSL3_AD_HANDSHAKE_FAILURE; | |
3436 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, | |
3437 | SSL_R_UNKNOWN_CERTIFICATE_TYPE); | |
3438 | goto f_err; | |
3439 | } | |
3440 | EVP_PKEY_free(pkey); | |
d02b48c6 RE |
3441 | } |
3442 | ||
b56bce4f | 3443 | if (s->session->peer != NULL) /* This should not be needed */ |
d02b48c6 | 3444 | X509_free(s->session->peer); |
f73e07cf | 3445 | s->session->peer=sk_X509_shift(sk); |
b1fe6ca1 | 3446 | s->session->verify_result = s->verify_result; |
8051996a | 3447 | |
b56bce4f BM |
3448 | /* With the current implementation, sess_cert will always be NULL |
3449 | * when we arrive here. */ | |
3450 | if (s->session->sess_cert == NULL) | |
3451 | { | |
3452 | s->session->sess_cert = ssl_sess_cert_new(); | |
3453 | if (s->session->sess_cert == NULL) | |
3454 | { | |
3455 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE); | |
3456 | goto err; | |
3457 | } | |
3458 | } | |
3459 | if (s->session->sess_cert->cert_chain != NULL) | |
3460 | sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free); | |
9d5cceac | 3461 | s->session->sess_cert->cert_chain=sk; |
98e04f9e BM |
3462 | /* Inconsistency alert: cert_chain does *not* include the |
3463 | * peer's own certificate, while we do include it in s3_clnt.c */ | |
8051996a | 3464 | |
b4cadc6e | 3465 | sk=NULL; |
d02b48c6 RE |
3466 | |
3467 | ret=1; | |
3468 | if (0) | |
3469 | { | |
3470 | f_err: | |
3471 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
3472 | } | |
3473 | err: | |
3474 | if (x != NULL) X509_free(x); | |
f73e07cf | 3475 | if (sk != NULL) sk_X509_pop_free(sk,X509_free); |
d02b48c6 RE |
3476 | return(ret); |
3477 | } | |
3478 | ||
6b691a5c | 3479 | int ssl3_send_server_certificate(SSL *s) |
d02b48c6 | 3480 | { |
c526ed41 | 3481 | CERT_PKEY *cpk; |
d02b48c6 RE |
3482 | |
3483 | if (s->state == SSL3_ST_SW_CERT_A) | |
3484 | { | |
c526ed41 DSH |
3485 | cpk=ssl_get_server_send_pkey(s); |
3486 | if (cpk == NULL) | |
52b8dad8 BM |
3487 | { |
3488 | /* VRS: allow null cert if auth == KRB5 */ | |
3489 | if ((s->s3->tmp.new_cipher->algorithm_auth != SSL_aKRB5) || | |
3490 | (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5)) | |
3491 | { | |
3492 | SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR); | |
3493 | return(0); | |
3494 | } | |
d02b48c6 RE |
3495 | } |
3496 | ||
66f96fe2 DSH |
3497 | if (!ssl3_output_cert_chain(s,cpk)) |
3498 | { | |
3499 | SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR); | |
3500 | return(0); | |
3501 | } | |
d02b48c6 | 3502 | s->state=SSL3_ST_SW_CERT_B; |
d02b48c6 RE |
3503 | } |
3504 | ||
3505 | /* SSL3_ST_SW_CERT_B */ | |
173e72e6 | 3506 | return ssl_do_write(s); |
d02b48c6 | 3507 | } |
c519e89f | 3508 | |
ddd3a617 | 3509 | #ifndef OPENSSL_NO_TLSEXT |
c519e89f | 3510 | /* send a new session ticket (not necessarily for a new session) */ |
6434abbf DSH |
3511 | int ssl3_send_newsession_ticket(SSL *s) |
3512 | { | |
3513 | if (s->state == SSL3_ST_SW_SESSION_TICKET_A) | |
3514 | { | |
3515 | unsigned char *p, *senc, *macstart; | |
c519e89f BM |
3516 | const unsigned char *const_p; |
3517 | int len, slen_full, slen; | |
3518 | SSL_SESSION *sess; | |
6434abbf DSH |
3519 | unsigned int hlen; |
3520 | EVP_CIPHER_CTX ctx; | |
3521 | HMAC_CTX hctx; | |
661dc143 | 3522 | SSL_CTX *tctx = s->initial_ctx; |
8a2062fe DSH |
3523 | unsigned char iv[EVP_MAX_IV_LENGTH]; |
3524 | unsigned char key_name[16]; | |
6434abbf DSH |
3525 | |
3526 | /* get session encoding length */ | |
c519e89f | 3527 | slen_full = i2d_SSL_SESSION(s->session, NULL); |
6434abbf DSH |
3528 | /* Some length values are 16 bits, so forget it if session is |
3529 | * too long | |
3530 | */ | |
c519e89f BM |
3531 | if (slen_full > 0xFF00) |
3532 | return -1; | |
3533 | senc = OPENSSL_malloc(slen_full); | |
3534 | if (!senc) | |
3535 | return -1; | |
3536 | p = senc; | |
3537 | i2d_SSL_SESSION(s->session, &p); | |
3538 | ||
3539 | /* create a fresh copy (not shared with other threads) to clean up */ | |
3540 | const_p = senc; | |
3541 | sess = d2i_SSL_SESSION(NULL, &const_p, slen_full); | |
3542 | if (sess == NULL) | |
3543 | { | |
3544 | OPENSSL_free(senc); | |
6434abbf | 3545 | return -1; |
c519e89f BM |
3546 | } |
3547 | sess->session_id_length = 0; /* ID is irrelevant for the ticket */ | |
3548 | ||
3549 | slen = i2d_SSL_SESSION(sess, NULL); | |
3550 | if (slen > slen_full) /* shouldn't ever happen */ | |
3551 | { | |
3552 | OPENSSL_free(senc); | |
3553 | return -1; | |
3554 | } | |
3555 | p = senc; | |
3556 | i2d_SSL_SESSION(sess, &p); | |
3557 | SSL_SESSION_free(sess); | |
3558 | ||
6434abbf | 3559 | /* Grow buffer if need be: the length calculation is as |
173e72e6 DSH |
3560 | * follows handshake_header_length + |
3561 | * 4 (ticket lifetime hint) + 2 (ticket length) + | |
6434abbf DSH |
3562 | * 16 (key name) + max_iv_len (iv length) + |
3563 | * session_length + max_enc_block_size (max encrypted session | |
3564 | * length) + max_md_size (HMAC). | |
3565 | */ | |
3566 | if (!BUF_MEM_grow(s->init_buf, | |
173e72e6 DSH |
3567 | SSL_HM_HEADER_LENGTH(s) + 22 + EVP_MAX_IV_LENGTH + |
3568 | EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_SIZE + slen)) | |
6434abbf | 3569 | return -1; |
173e72e6 | 3570 | p = ssl_handshake_start(s); |
8a2062fe DSH |
3571 | EVP_CIPHER_CTX_init(&ctx); |
3572 | HMAC_CTX_init(&hctx); | |
3573 | /* Initialize HMAC and cipher contexts. If callback present | |
3574 | * it does all the work otherwise use generated values | |
3575 | * from parent ctx. | |
3576 | */ | |
661dc143 | 3577 | if (tctx->tlsext_ticket_key_cb) |
8a2062fe | 3578 | { |
661dc143 | 3579 | if (tctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx, |
8a2062fe DSH |
3580 | &hctx, 1) < 0) |
3581 | { | |
3582 | OPENSSL_free(senc); | |
3583 | return -1; | |
3584 | } | |
3585 | } | |
3586 | else | |
3587 | { | |
3588 | RAND_pseudo_bytes(iv, 16); | |
3589 | EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL, | |
661dc143 DSH |
3590 | tctx->tlsext_tick_aes_key, iv); |
3591 | HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16, | |
8a2062fe | 3592 | tlsext_tick_md(), NULL); |
661dc143 | 3593 | memcpy(key_name, tctx->tlsext_tick_key_name, 16); |
8a2062fe | 3594 | } |
c519e89f BM |
3595 | |
3596 | /* Ticket lifetime hint (advisory only): | |
3597 | * We leave this unspecified for resumed session (for simplicity), | |
3598 | * and guess that tickets for new sessions will live as long | |
3599 | * as their sessions. */ | |
3600 | l2n(s->hit ? 0 : s->session->timeout, p); | |
3601 | ||
6434abbf DSH |
3602 | /* Skip ticket length for now */ |
3603 | p += 2; | |
3604 | /* Output key name */ | |
3605 | macstart = p; | |
8a2062fe | 3606 | memcpy(p, key_name, 16); |
6434abbf | 3607 | p += 16; |
8a2062fe DSH |
3608 | /* output IV */ |
3609 | memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx)); | |
3610 | p += EVP_CIPHER_CTX_iv_length(&ctx); | |
6434abbf | 3611 | /* Encrypt session data */ |
43982224 | 3612 | EVP_EncryptUpdate(&ctx, p, &len, senc, slen); |
6434abbf | 3613 | p += len; |
43982224 | 3614 | EVP_EncryptFinal(&ctx, p, &len); |
6434abbf | 3615 | p += len; |
71af26b5 | 3616 | EVP_CIPHER_CTX_cleanup(&ctx); |
43982224 DSH |
3617 | |
3618 | HMAC_Update(&hctx, macstart, p - macstart); | |
3619 | HMAC_Final(&hctx, p, &hlen); | |
6434abbf DSH |
3620 | HMAC_CTX_cleanup(&hctx); |
3621 | ||
3622 | p += hlen; | |
3623 | /* Now write out lengths: p points to end of data written */ | |
3624 | /* Total length */ | |
173e72e6 DSH |
3625 | len = p - ssl_handshake_start(s); |
3626 | ssl_set_handshake_header(s, SSL3_MT_NEWSESSION_TICKET, len); | |
3627 | /* Skip ticket lifetime hint */ | |
3628 | p = ssl_handshake_start(s) + 4; | |
3629 | s2n(len - 6, p); | |
6434abbf | 3630 | s->state=SSL3_ST_SW_SESSION_TICKET_B; |
6434abbf DSH |
3631 | OPENSSL_free(senc); |
3632 | } | |
3633 | ||
3634 | /* SSL3_ST_SW_SESSION_TICKET_B */ | |
173e72e6 | 3635 | return ssl_do_write(s); |
6434abbf | 3636 | } |
67c8e7f4 DSH |
3637 | |
3638 | int ssl3_send_cert_status(SSL *s) | |
3639 | { | |
3640 | if (s->state == SSL3_ST_SW_CERT_STATUS_A) | |
3641 | { | |
3642 | unsigned char *p; | |
3643 | /* Grow buffer if need be: the length calculation is as | |
3644 | * follows 1 (message type) + 3 (message length) + | |
3645 | * 1 (ocsp response type) + 3 (ocsp response length) | |
3646 | * + (ocsp response) | |
3647 | */ | |
3648 | if (!BUF_MEM_grow(s->init_buf, 8 + s->tlsext_ocsp_resplen)) | |
3649 | return -1; | |
3650 | ||
3651 | p=(unsigned char *)s->init_buf->data; | |
3652 | ||
3653 | /* do the header */ | |
3654 | *(p++)=SSL3_MT_CERTIFICATE_STATUS; | |
3655 | /* message length */ | |
3656 | l2n3(s->tlsext_ocsp_resplen + 4, p); | |
3657 | /* status type */ | |
3658 | *(p++)= s->tlsext_status_type; | |
3659 | /* length of OCSP response */ | |
3660 | l2n3(s->tlsext_ocsp_resplen, p); | |
3661 | /* actual response */ | |
3662 | memcpy(p, s->tlsext_ocsp_resp, s->tlsext_ocsp_resplen); | |
3663 | /* number of bytes to write */ | |
3664 | s->init_num = 8 + s->tlsext_ocsp_resplen; | |
3665 | s->state=SSL3_ST_SW_CERT_STATUS_B; | |
3666 | s->init_off = 0; | |
3667 | } | |
3668 | ||
3669 | /* SSL3_ST_SW_CERT_STATUS_B */ | |
3670 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
3671 | } | |
ee2ffc27 | 3672 | |
71fa4513 | 3673 | # ifndef OPENSSL_NO_NEXTPROTONEG |
ee2ffc27 BL |
3674 | /* ssl3_get_next_proto reads a Next Protocol Negotiation handshake message. It |
3675 | * sets the next_proto member in s if found */ | |
3676 | int ssl3_get_next_proto(SSL *s) | |
3677 | { | |
3678 | int ok; | |
5df2a249 | 3679 | int proto_len, padding_len; |
ee2ffc27 BL |
3680 | long n; |
3681 | const unsigned char *p; | |
3682 | ||
3683 | /* Clients cannot send a NextProtocol message if we didn't see the | |
3684 | * extension in their ClientHello */ | |
3685 | if (!s->s3->next_proto_neg_seen) | |
3686 | { | |
3687 | SSLerr(SSL_F_SSL3_GET_NEXT_PROTO,SSL_R_GOT_NEXT_PROTO_WITHOUT_EXTENSION); | |
3688 | return -1; | |
3689 | } | |
3690 | ||
3691 | n=s->method->ssl_get_message(s, | |
3692 | SSL3_ST_SR_NEXT_PROTO_A, | |
3693 | SSL3_ST_SR_NEXT_PROTO_B, | |
3694 | SSL3_MT_NEXT_PROTO, | |
bf48836c | 3695 | 514, /* See the payload format below */ |
ee2ffc27 BL |
3696 | &ok); |
3697 | ||
3698 | if (!ok) | |
3699 | return((int)n); | |
3700 | ||
3701 | /* s->state doesn't reflect whether ChangeCipherSpec has been received | |
3702 | * in this handshake, but s->s3->change_cipher_spec does (will be reset | |
3703 | * by ssl3_get_finished). */ | |
3704 | if (!s->s3->change_cipher_spec) | |
3705 | { | |
3706 | SSLerr(SSL_F_SSL3_GET_NEXT_PROTO,SSL_R_GOT_NEXT_PROTO_BEFORE_A_CCS); | |
3707 | return -1; | |
3708 | } | |
3709 | ||
3710 | if (n < 2) | |
3711 | return 0; /* The body must be > 1 bytes long */ | |
3712 | ||
3713 | p=(unsigned char *)s->init_msg; | |
3714 | ||
3715 | /* The payload looks like: | |
3716 | * uint8 proto_len; | |
3717 | * uint8 proto[proto_len]; | |
3718 | * uint8 padding_len; | |
3719 | * uint8 padding[padding_len]; | |
3720 | */ | |
3721 | proto_len = p[0]; | |
3722 | if (proto_len + 2 > s->init_num) | |
3723 | return 0; | |
3724 | padding_len = p[proto_len + 1]; | |
3725 | if (proto_len + padding_len + 2 != s->init_num) | |
3726 | return 0; | |
3727 | ||
3728 | s->next_proto_negotiated = OPENSSL_malloc(proto_len); | |
3729 | if (!s->next_proto_negotiated) | |
3730 | { | |
3731 | SSLerr(SSL_F_SSL3_GET_NEXT_PROTO,ERR_R_MALLOC_FAILURE); | |
3732 | return 0; | |
3733 | } | |
3734 | memcpy(s->next_proto_negotiated, p + 1, proto_len); | |
3735 | s->next_proto_negotiated_len = proto_len; | |
3736 | ||
3737 | return 1; | |
3738 | } | |
3739 | # endif | |
a9e1c50b | 3740 | |
6434abbf | 3741 | #endif |