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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> |
a3654f05 | 155 | #include <openssl/crypto.h> |
7b63c0fa LJ |
156 | #include "ssl_locl.h" |
157 | #include "kssl_lcl.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 | |
4ebb342f | 173 | static const SSL_METHOD *ssl3_get_server_method(int ver); |
d02b48c6 | 174 | |
4ebb342f | 175 | static const SSL_METHOD *ssl3_get_server_method(int ver) |
d02b48c6 | 176 | { |
58964a49 | 177 | if (ver == SSL3_VERSION) |
d02b48c6 RE |
178 | return(SSLv3_server_method()); |
179 | else | |
180 | return(NULL); | |
181 | } | |
182 | ||
edc032b5 | 183 | #ifndef OPENSSL_NO_SRP |
ebba6c48 | 184 | static int ssl_check_srp_ext_ClientHello(SSL *s,int *al) |
edc032b5 BL |
185 | { |
186 | int ret = SSL_ERROR_NONE; | |
187 | ||
ebba6c48 | 188 | *al = SSL_AD_UNRECOGNIZED_NAME; |
edc032b5 BL |
189 | |
190 | if ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) && | |
191 | (s->srp_ctx.TLS_ext_srp_username_callback != NULL)) | |
192 | { | |
193 | if(s->srp_ctx.login == NULL) | |
194 | { | |
ebba6c48 DSH |
195 | /* RFC 5054 says SHOULD reject, |
196 | we do so if There is no srp login name */ | |
197 | ret = SSL3_AL_FATAL; | |
198 | *al = SSL_AD_UNKNOWN_PSK_IDENTITY; | |
edc032b5 BL |
199 | } |
200 | else | |
201 | { | |
ebba6c48 | 202 | ret = SSL_srp_server_param_with_username(s,al); |
edc032b5 BL |
203 | } |
204 | } | |
205 | return ret; | |
206 | } | |
207 | #endif | |
208 | ||
f3b656b2 DSH |
209 | IMPLEMENT_ssl3_meth_func(SSLv3_server_method, |
210 | ssl3_accept, | |
211 | ssl_undefined_function, | |
212 | ssl3_get_server_method) | |
d02b48c6 | 213 | |
6b691a5c | 214 | int ssl3_accept(SSL *s) |
d02b48c6 RE |
215 | { |
216 | BUF_MEM *buf; | |
52b8dad8 | 217 | unsigned long alg_k,Time=(unsigned long)time(NULL); |
45d87a1f | 218 | void (*cb)(const SSL *ssl,int type,int val)=NULL; |
d02b48c6 | 219 | int ret= -1; |
d02b48c6 RE |
220 | int new_state,state,skip=0; |
221 | ||
eb952088 | 222 | RAND_add(&Time,sizeof(Time),0); |
d02b48c6 | 223 | ERR_clear_error(); |
58964a49 | 224 | clear_sys_error(); |
d02b48c6 RE |
225 | |
226 | if (s->info_callback != NULL) | |
227 | cb=s->info_callback; | |
228 | else if (s->ctx->info_callback != NULL) | |
229 | cb=s->ctx->info_callback; | |
230 | ||
231 | /* init things to blank */ | |
d02b48c6 | 232 | s->in_handshake++; |
979689aa | 233 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); |
d02b48c6 | 234 | |
b56bce4f | 235 | if (s->cert == NULL) |
d02b48c6 RE |
236 | { |
237 | SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET); | |
b56bce4f | 238 | return(-1); |
d02b48c6 | 239 | } |
d02b48c6 | 240 | |
4817504d DSH |
241 | #ifndef OPENSSL_NO_HEARTBEATS |
242 | /* If we're awaiting a HeartbeatResponse, pretend we | |
243 | * already got and don't await it anymore, because | |
244 | * Heartbeats don't make sense during handshakes anyway. | |
245 | */ | |
246 | if (s->tlsext_hb_pending) | |
247 | { | |
248 | s->tlsext_hb_pending = 0; | |
249 | s->tlsext_hb_seq++; | |
250 | } | |
251 | #endif | |
252 | ||
d02b48c6 RE |
253 | for (;;) |
254 | { | |
255 | state=s->state; | |
256 | ||
257 | switch (s->state) | |
258 | { | |
259 | case SSL_ST_RENEGOTIATE: | |
44959ee4 | 260 | s->renegotiate=1; |
d02b48c6 RE |
261 | /* s->state=SSL_ST_ACCEPT; */ |
262 | ||
263 | case SSL_ST_BEFORE: | |
264 | case SSL_ST_ACCEPT: | |
265 | case SSL_ST_BEFORE|SSL_ST_ACCEPT: | |
266 | case SSL_ST_OK|SSL_ST_ACCEPT: | |
267 | ||
413c4f45 | 268 | s->server=1; |
d02b48c6 RE |
269 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); |
270 | ||
58964a49 | 271 | if ((s->version>>8) != 3) |
bbb8de09 | 272 | { |
5277d7cb | 273 | SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR); |
bbb8de09 BM |
274 | return -1; |
275 | } | |
d02b48c6 RE |
276 | s->type=SSL_ST_ACCEPT; |
277 | ||
278 | if (s->init_buf == NULL) | |
279 | { | |
280 | if ((buf=BUF_MEM_new()) == NULL) | |
281 | { | |
282 | ret= -1; | |
283 | goto end; | |
284 | } | |
285 | if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) | |
286 | { | |
287 | ret= -1; | |
288 | goto end; | |
289 | } | |
290 | s->init_buf=buf; | |
291 | } | |
292 | ||
293 | if (!ssl3_setup_buffers(s)) | |
294 | { | |
295 | ret= -1; | |
296 | goto end; | |
297 | } | |
298 | ||
d02b48c6 | 299 | s->init_num=0; |
d0dc991c | 300 | s->s3->flags &= ~SSL3_FLAGS_SGC_RESTART_DONE; |
0d609395 | 301 | s->s3->flags &= ~TLS1_FLAGS_SKIP_CERT_VERIFY; |
d02b48c6 RE |
302 | |
303 | if (s->state != SSL_ST_RENEGOTIATE) | |
304 | { | |
8e2f6b79 BM |
305 | /* Ok, we now need to push on a buffering BIO so that |
306 | * the output is sent in a way that TCP likes :-) | |
307 | */ | |
308 | if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; } | |
309 | ||
745c70e5 | 310 | ssl3_init_finished_mac(s); |
d02b48c6 | 311 | s->state=SSL3_ST_SR_CLNT_HELLO_A; |
413c4f45 | 312 | s->ctx->stats.sess_accept++; |
d02b48c6 | 313 | } |
3a88efd4 DSH |
314 | else if (!s->s3->send_connection_binding && |
315 | !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) | |
316 | { | |
317 | /* Server attempting to renegotiate with | |
318 | * client that doesn't support secure | |
319 | * renegotiation. | |
320 | */ | |
321 | SSLerr(SSL_F_SSL3_ACCEPT, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED); | |
322 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); | |
323 | ret = -1; | |
324 | goto end; | |
325 | } | |
d02b48c6 RE |
326 | else |
327 | { | |
8e2f6b79 BM |
328 | /* s->state == SSL_ST_RENEGOTIATE, |
329 | * we will just send a HelloRequest */ | |
413c4f45 | 330 | s->ctx->stats.sess_accept_renegotiate++; |
d02b48c6 RE |
331 | s->state=SSL3_ST_SW_HELLO_REQ_A; |
332 | } | |
333 | break; | |
334 | ||
335 | case SSL3_ST_SW_HELLO_REQ_A: | |
336 | case SSL3_ST_SW_HELLO_REQ_B: | |
337 | ||
338 | s->shutdown=0; | |
339 | ret=ssl3_send_hello_request(s); | |
340 | if (ret <= 0) goto end; | |
341 | s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C; | |
342 | s->state=SSL3_ST_SW_FLUSH; | |
343 | s->init_num=0; | |
344 | ||
345 | ssl3_init_finished_mac(s); | |
346 | break; | |
347 | ||
348 | case SSL3_ST_SW_HELLO_REQ_C: | |
d02b48c6 | 349 | s->state=SSL_ST_OK; |
2260ad21 | 350 | break; |
d02b48c6 RE |
351 | |
352 | case SSL3_ST_SR_CLNT_HELLO_A: | |
353 | case SSL3_ST_SR_CLNT_HELLO_B: | |
354 | case SSL3_ST_SR_CLNT_HELLO_C: | |
355 | ||
c79f22c6 DSH |
356 | if (s->rwstate != SSL_X509_LOOKUP) |
357 | { | |
358 | ret=ssl3_get_client_hello(s); | |
359 | if (ret <= 0) goto end; | |
360 | } | |
edc032b5 BL |
361 | #ifndef OPENSSL_NO_SRP |
362 | { | |
ebba6c48 | 363 | int al; |
c79f22c6 DSH |
364 | if ((ret = ssl_check_srp_ext_ClientHello(s,&al)) < 0) |
365 | { | |
366 | /* callback indicates firther work to be done */ | |
367 | s->rwstate=SSL_X509_LOOKUP; | |
368 | goto end; | |
369 | } | |
370 | if (ret != SSL_ERROR_NONE) | |
371 | { | |
372 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
373 | /* This is not really an error but the only means to | |
374 | for a client to detect whether srp is supported. */ | |
375 | if (al != TLS1_AD_UNKNOWN_PSK_IDENTITY) | |
376 | SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_CLIENTHELLO_TLSEXT); | |
ebba6c48 DSH |
377 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; |
378 | ret= -1; | |
379 | goto end; | |
c79f22c6 | 380 | } |
edc032b5 | 381 | } |
c79f22c6 | 382 | #endif |
58ece833 | 383 | |
44959ee4 | 384 | s->renegotiate = 2; |
d02b48c6 RE |
385 | s->state=SSL3_ST_SW_SRVR_HELLO_A; |
386 | s->init_num=0; | |
387 | break; | |
388 | ||
389 | case SSL3_ST_SW_SRVR_HELLO_A: | |
390 | case SSL3_ST_SW_SRVR_HELLO_B: | |
391 | ret=ssl3_send_server_hello(s); | |
392 | if (ret <= 0) goto end; | |
d26c905c | 393 | #ifndef OPENSSL_NO_TLSEXT |
d02b48c6 | 394 | if (s->hit) |
d26c905c DSH |
395 | { |
396 | if (s->tlsext_ticket_expected) | |
397 | s->state=SSL3_ST_SW_SESSION_TICKET_A; | |
398 | else | |
399 | s->state=SSL3_ST_SW_CHANGE_A; | |
400 | } | |
401 | #else | |
402 | if (s->hit) | |
403 | s->state=SSL3_ST_SW_CHANGE_A; | |
404 | #endif | |
d02b48c6 RE |
405 | else |
406 | s->state=SSL3_ST_SW_CERT_A; | |
407 | s->init_num=0; | |
408 | break; | |
409 | ||
410 | case SSL3_ST_SW_CERT_A: | |
411 | case SSL3_ST_SW_CERT_B: | |
cbb92dfa | 412 | /* Check if it is anon DH or anon ECDH, */ |
edc032b5 | 413 | /* normal PSK or KRB5 or SRP */ |
52b8dad8 BM |
414 | if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) |
415 | && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK) | |
416 | && !(s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) | |
d02b48c6 RE |
417 | { |
418 | ret=ssl3_send_server_certificate(s); | |
419 | if (ret <= 0) goto end; | |
67c8e7f4 DSH |
420 | #ifndef OPENSSL_NO_TLSEXT |
421 | if (s->tlsext_status_expected) | |
422 | s->state=SSL3_ST_SW_CERT_STATUS_A; | |
423 | else | |
424 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
d02b48c6 | 425 | } |
67c8e7f4 DSH |
426 | else |
427 | { | |
428 | skip = 1; | |
429 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
430 | } | |
431 | #else | |
3ce54f35 | 432 | } |
d02b48c6 RE |
433 | else |
434 | skip=1; | |
67c8e7f4 | 435 | |
d02b48c6 | 436 | s->state=SSL3_ST_SW_KEY_EXCH_A; |
67c8e7f4 | 437 | #endif |
d02b48c6 RE |
438 | s->init_num=0; |
439 | break; | |
440 | ||
441 | case SSL3_ST_SW_KEY_EXCH_A: | |
442 | case SSL3_ST_SW_KEY_EXCH_B: | |
52b8dad8 | 443 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
d02b48c6 RE |
444 | |
445 | /* clear this, it may get reset by | |
446 | * send_server_key_exchange */ | |
f9b3bff6 | 447 | if ((s->options & SSL_OP_EPHEMERAL_RSA) |
bc36ee62 | 448 | #ifndef OPENSSL_NO_KRB5 |
52b8dad8 | 449 | && !(alg_k & SSL_kKRB5) |
bc36ee62 | 450 | #endif /* OPENSSL_NO_KRB5 */ |
f9b3bff6 | 451 | ) |
7bc03ded BM |
452 | /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key |
453 | * even when forbidden by protocol specs | |
454 | * (handshake may fail as clients are not required to | |
455 | * be able to handle this) */ | |
d02b48c6 RE |
456 | s->s3->tmp.use_rsa_tmp=1; |
457 | else | |
458 | s->s3->tmp.use_rsa_tmp=0; | |
459 | ||
ea262260 | 460 | |
d02b48c6 | 461 | /* only send if a DH key exchange, fortezza or |
ea262260 BM |
462 | * RSA but we have a sign only certificate |
463 | * | |
ddac1974 NL |
464 | * PSK: may send PSK identity hints |
465 | * | |
ea262260 BM |
466 | * For ECC ciphersuites, we send a serverKeyExchange |
467 | * message only if the cipher suite is either | |
468 | * ECDH-anon or ECDHE. In other cases, the | |
89bbe14c | 469 | * server certificate contains the server's |
ea262260 BM |
470 | * public key for key exchange. |
471 | */ | |
06ab81f9 | 472 | if (s->s3->tmp.use_rsa_tmp |
ddac1974 NL |
473 | /* PSK: send ServerKeyExchange if PSK identity |
474 | * hint if provided */ | |
475 | #ifndef OPENSSL_NO_PSK | |
52b8dad8 | 476 | || ((alg_k & SSL_kPSK) && s->ctx->psk_identity_hint) |
edc032b5 BL |
477 | #endif |
478 | #ifndef OPENSSL_NO_SRP | |
479 | /* SRP: send ServerKeyExchange */ | |
480 | || (alg_k & SSL_kSRP) | |
ddac1974 | 481 | #endif |
8e1dc4d7 | 482 | || (alg_k & SSL_kEDH) |
52b8dad8 BM |
483 | || (alg_k & SSL_kEECDH) |
484 | || ((alg_k & SSL_kRSA) | |
b56bce4f | 485 | && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL |
018e57c7 DSH |
486 | || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) |
487 | && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher) | |
06ab81f9 BL |
488 | ) |
489 | ) | |
490 | ) | |
d02b48c6 | 491 | ) |
d02b48c6 RE |
492 | { |
493 | ret=ssl3_send_server_key_exchange(s); | |
494 | if (ret <= 0) goto end; | |
495 | } | |
496 | else | |
497 | skip=1; | |
498 | ||
499 | s->state=SSL3_ST_SW_CERT_REQ_A; | |
500 | s->init_num=0; | |
501 | break; | |
502 | ||
503 | case SSL3_ST_SW_CERT_REQ_A: | |
504 | case SSL3_ST_SW_CERT_REQ_B: | |
47134b78 BM |
505 | if (/* don't request cert unless asked for it: */ |
506 | !(s->verify_mode & SSL_VERIFY_PEER) || | |
507 | /* if SSL_VERIFY_CLIENT_ONCE is set, | |
508 | * don't request cert during re-negotiation: */ | |
d02b48c6 | 509 | ((s->session->peer != NULL) && |
47134b78 BM |
510 | (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) || |
511 | /* never request cert in anonymous ciphersuites | |
512 | * (see section "Certificate request" in SSL 3 drafts | |
513 | * and in RFC 2246): */ | |
52b8dad8 | 514 | ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && |
47134b78 BM |
515 | /* ... except when the application insists on verification |
516 | * (against the specs, but s3_clnt.c accepts this for SSL 3) */ | |
45442167 | 517 | !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) || |
52b8dad8 BM |
518 | /* never request cert in Kerberos ciphersuites */ |
519 | (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) | |
ddac1974 NL |
520 | /* With normal PSK Certificates and |
521 | * Certificate Requests are omitted */ | |
52b8dad8 | 522 | || (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) |
d02b48c6 RE |
523 | { |
524 | /* no cert request */ | |
525 | skip=1; | |
58964a49 | 526 | s->s3->tmp.cert_request=0; |
d02b48c6 | 527 | s->state=SSL3_ST_SW_SRVR_DONE_A; |
f37f20ff DSH |
528 | if (s->s3->handshake_buffer) |
529 | if (!ssl3_digest_cached_records(s)) | |
530 | return -1; | |
d02b48c6 RE |
531 | } |
532 | else | |
533 | { | |
58964a49 | 534 | s->s3->tmp.cert_request=1; |
d02b48c6 RE |
535 | ret=ssl3_send_certificate_request(s); |
536 | if (ret <= 0) goto end; | |
de469ef2 | 537 | #ifndef NETSCAPE_HANG_BUG |
d02b48c6 | 538 | s->state=SSL3_ST_SW_SRVR_DONE_A; |
de469ef2 DSH |
539 | #else |
540 | s->state=SSL3_ST_SW_FLUSH; | |
541 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
542 | #endif | |
d02b48c6 RE |
543 | s->init_num=0; |
544 | } | |
545 | break; | |
546 | ||
547 | case SSL3_ST_SW_SRVR_DONE_A: | |
548 | case SSL3_ST_SW_SRVR_DONE_B: | |
549 | ret=ssl3_send_server_done(s); | |
550 | if (ret <= 0) goto end; | |
551 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
552 | s->state=SSL3_ST_SW_FLUSH; | |
553 | s->init_num=0; | |
554 | break; | |
555 | ||
556 | case SSL3_ST_SW_FLUSH: | |
d5e7f2f2 DSH |
557 | |
558 | /* This code originally checked to see if | |
559 | * any data was pending using BIO_CTRL_INFO | |
560 | * and then flushed. This caused problems | |
561 | * as documented in PR#1939. The proposed | |
562 | * fix doesn't completely resolve this issue | |
563 | * as buggy implementations of BIO_CTRL_PENDING | |
564 | * still exist. So instead we just flush | |
565 | * unconditionally. | |
21a5c040 DSH |
566 | */ |
567 | ||
d5e7f2f2 DSH |
568 | s->rwstate=SSL_WRITING; |
569 | if (BIO_flush(s->wbio) <= 0) | |
d02b48c6 | 570 | { |
d5e7f2f2 DSH |
571 | ret= -1; |
572 | goto end; | |
d02b48c6 | 573 | } |
d5e7f2f2 | 574 | s->rwstate=SSL_NOTHING; |
d02b48c6 RE |
575 | |
576 | s->state=s->s3->tmp.next_state; | |
577 | break; | |
578 | ||
579 | case SSL3_ST_SR_CERT_A: | |
580 | case SSL3_ST_SR_CERT_B: | |
745c70e5 | 581 | /* Check for second client hello (MS SGC) */ |
3d14b9d0 | 582 | ret = ssl3_check_client_hello(s); |
745c70e5 BM |
583 | if (ret <= 0) |
584 | goto end; | |
585 | if (ret == 2) | |
586 | s->state = SSL3_ST_SR_CLNT_HELLO_C; | |
3d14b9d0 | 587 | else { |
14f3d7c5 DSH |
588 | if (s->s3->tmp.cert_request) |
589 | { | |
590 | ret=ssl3_get_client_certificate(s); | |
591 | if (ret <= 0) goto end; | |
592 | } | |
3d14b9d0 DSH |
593 | s->init_num=0; |
594 | s->state=SSL3_ST_SR_KEY_EXCH_A; | |
595 | } | |
d02b48c6 RE |
596 | break; |
597 | ||
598 | case SSL3_ST_SR_KEY_EXCH_A: | |
599 | case SSL3_ST_SR_KEY_EXCH_B: | |
600 | ret=ssl3_get_client_key_exchange(s); | |
89bbe14c | 601 | if (ret <= 0) |
ea262260 BM |
602 | goto end; |
603 | if (ret == 2) | |
604 | { | |
605 | /* For the ECDH ciphersuites when | |
606 | * the client sends its ECDH pub key in | |
607 | * a certificate, the CertificateVerify | |
608 | * message is not sent. | |
f0288f05 DSH |
609 | * Also for GOST ciphersuites when |
610 | * the client uses its key from the certificate | |
611 | * for key exchange. | |
ea262260 | 612 | */ |
bf48836c | 613 | #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) |
ea262260 | 614 | s->state=SSL3_ST_SR_FINISHED_A; |
ee2ffc27 BL |
615 | #else |
616 | if (s->s3->next_proto_neg_seen) | |
617 | s->state=SSL3_ST_SR_NEXT_PROTO_A; | |
618 | else | |
619 | s->state=SSL3_ST_SR_FINISHED_A; | |
620 | #endif | |
ea262260 BM |
621 | s->init_num = 0; |
622 | } | |
238b6361 | 623 | else if (TLS1_get_version(s) >= TLS1_2_VERSION) |
f37f20ff DSH |
624 | { |
625 | s->state=SSL3_ST_SR_CERT_VRFY_A; | |
626 | s->init_num=0; | |
627 | if (!s->session->peer) | |
628 | break; | |
629 | /* For TLS v1.2 freeze the handshake buffer | |
630 | * at this point and digest cached records. | |
631 | */ | |
632 | if (!s->s3->handshake_buffer) | |
633 | { | |
634 | SSLerr(SSL_F_SSL3_ACCEPT,ERR_R_INTERNAL_ERROR); | |
635 | return -1; | |
636 | } | |
637 | s->s3->flags |= TLS1_FLAGS_KEEP_HANDSHAKE; | |
638 | if (!ssl3_digest_cached_records(s)) | |
639 | return -1; | |
640 | } | |
89bbe14c | 641 | else |
ea262260 | 642 | { |
0e1dba93 DSH |
643 | int offset=0; |
644 | int dgst_num; | |
0eab41fb | 645 | |
ea262260 BM |
646 | s->state=SSL3_ST_SR_CERT_VRFY_A; |
647 | s->init_num=0; | |
d02b48c6 | 648 | |
ea262260 BM |
649 | /* We need to get hashes here so if there is |
650 | * a client cert, it can be verified | |
81025661 DSH |
651 | * FIXME - digest processing for CertificateVerify |
652 | * should be generalized. But it is next step | |
89bbe14c | 653 | */ |
0e1dba93 | 654 | if (s->s3->handshake_buffer) |
6ba71a71 BL |
655 | if (!ssl3_digest_cached_records(s)) |
656 | return -1; | |
0e1dba93 DSH |
657 | for (dgst_num=0; dgst_num<SSL_MAX_DIGEST;dgst_num++) |
658 | if (s->s3->handshake_dgst[dgst_num]) | |
659 | { | |
0eab41fb BL |
660 | int dgst_size; |
661 | ||
0e1dba93 | 662 | 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 |
663 | dgst_size=EVP_MD_CTX_size(s->s3->handshake_dgst[dgst_num]); |
664 | if (dgst_size < 0) | |
665 | { | |
666 | ret = -1; | |
667 | goto end; | |
668 | } | |
669 | offset+=dgst_size; | |
0e1dba93 | 670 | } |
ea262260 | 671 | } |
d02b48c6 RE |
672 | break; |
673 | ||
674 | case SSL3_ST_SR_CERT_VRFY_A: | |
675 | case SSL3_ST_SR_CERT_VRFY_B: | |
676 | ||
677 | /* we should decide if we expected this one */ | |
678 | ret=ssl3_get_cert_verify(s); | |
679 | if (ret <= 0) goto end; | |
680 | ||
bf48836c | 681 | #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) |
d02b48c6 | 682 | s->state=SSL3_ST_SR_FINISHED_A; |
ee2ffc27 BL |
683 | #else |
684 | if (s->s3->next_proto_neg_seen) | |
685 | s->state=SSL3_ST_SR_NEXT_PROTO_A; | |
686 | else | |
687 | s->state=SSL3_ST_SR_FINISHED_A; | |
688 | #endif | |
d02b48c6 RE |
689 | s->init_num=0; |
690 | break; | |
691 | ||
bf48836c | 692 | #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) |
ee2ffc27 BL |
693 | case SSL3_ST_SR_NEXT_PROTO_A: |
694 | case SSL3_ST_SR_NEXT_PROTO_B: | |
695 | ret=ssl3_get_next_proto(s); | |
696 | if (ret <= 0) goto end; | |
697 | s->init_num = 0; | |
698 | s->state=SSL3_ST_SR_FINISHED_A; | |
699 | break; | |
700 | #endif | |
701 | ||
d02b48c6 RE |
702 | case SSL3_ST_SR_FINISHED_A: |
703 | case SSL3_ST_SR_FINISHED_B: | |
704 | ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A, | |
58964a49 | 705 | SSL3_ST_SR_FINISHED_B); |
d02b48c6 | 706 | if (ret <= 0) goto end; |
d26c905c DSH |
707 | if (s->hit) |
708 | s->state=SSL_ST_OK; | |
c519e89f BM |
709 | #ifndef OPENSSL_NO_TLSEXT |
710 | else if (s->tlsext_ticket_expected) | |
711 | s->state=SSL3_ST_SW_SESSION_TICKET_A; | |
6434abbf | 712 | #endif |
d02b48c6 RE |
713 | else |
714 | s->state=SSL3_ST_SW_CHANGE_A; | |
715 | s->init_num=0; | |
716 | break; | |
717 | ||
6434abbf DSH |
718 | #ifndef OPENSSL_NO_TLSEXT |
719 | case SSL3_ST_SW_SESSION_TICKET_A: | |
720 | case SSL3_ST_SW_SESSION_TICKET_B: | |
721 | ret=ssl3_send_newsession_ticket(s); | |
722 | if (ret <= 0) goto end; | |
723 | s->state=SSL3_ST_SW_CHANGE_A; | |
724 | s->init_num=0; | |
725 | break; | |
726 | ||
67c8e7f4 DSH |
727 | case SSL3_ST_SW_CERT_STATUS_A: |
728 | case SSL3_ST_SW_CERT_STATUS_B: | |
729 | ret=ssl3_send_cert_status(s); | |
730 | if (ret <= 0) goto end; | |
731 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
732 | s->init_num=0; | |
733 | break; | |
734 | ||
6434abbf DSH |
735 | #endif |
736 | ||
d02b48c6 RE |
737 | case SSL3_ST_SW_CHANGE_A: |
738 | case SSL3_ST_SW_CHANGE_B: | |
739 | ||
740 | s->session->cipher=s->s3->tmp.new_cipher; | |
58964a49 RE |
741 | if (!s->method->ssl3_enc->setup_key_block(s)) |
742 | { ret= -1; goto end; } | |
d02b48c6 RE |
743 | |
744 | ret=ssl3_send_change_cipher_spec(s, | |
745 | SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B); | |
746 | ||
747 | if (ret <= 0) goto end; | |
748 | s->state=SSL3_ST_SW_FINISHED_A; | |
749 | s->init_num=0; | |
750 | ||
58964a49 | 751 | if (!s->method->ssl3_enc->change_cipher_state(s, |
d02b48c6 RE |
752 | SSL3_CHANGE_CIPHER_SERVER_WRITE)) |
753 | { | |
754 | ret= -1; | |
755 | goto end; | |
756 | } | |
757 | ||
758 | break; | |
759 | ||
760 | case SSL3_ST_SW_FINISHED_A: | |
761 | case SSL3_ST_SW_FINISHED_B: | |
762 | ret=ssl3_send_finished(s, | |
763 | SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B, | |
c44f7540 BM |
764 | s->method->ssl3_enc->server_finished_label, |
765 | s->method->ssl3_enc->server_finished_label_len); | |
d02b48c6 RE |
766 | if (ret <= 0) goto end; |
767 | s->state=SSL3_ST_SW_FLUSH; | |
768 | if (s->hit) | |
ee2ffc27 | 769 | { |
bf48836c | 770 | #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) |
d02b48c6 | 771 | s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; |
ee2ffc27 BL |
772 | #else |
773 | if (s->s3->next_proto_neg_seen) | |
774 | s->s3->tmp.next_state=SSL3_ST_SR_NEXT_PROTO_A; | |
775 | else | |
776 | s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; | |
777 | #endif | |
778 | } | |
d02b48c6 RE |
779 | else |
780 | s->s3->tmp.next_state=SSL_ST_OK; | |
781 | s->init_num=0; | |
782 | break; | |
783 | ||
784 | case SSL_ST_OK: | |
785 | /* clean a few things up */ | |
786 | ssl3_cleanup_key_block(s); | |
787 | ||
788 | BUF_MEM_free(s->init_buf); | |
789 | s->init_buf=NULL; | |
790 | ||
791 | /* remove buffering on output */ | |
413c4f45 | 792 | ssl_free_wbio_buffer(s); |
d02b48c6 | 793 | |
d02b48c6 RE |
794 | s->init_num=0; |
795 | ||
44959ee4 | 796 | if (s->renegotiate == 2) /* skipped if we just sent a HelloRequest */ |
b49124f6 | 797 | { |
44959ee4 | 798 | s->renegotiate=0; |
b49124f6 BM |
799 | s->new_session=0; |
800 | ||
801 | ssl_update_cache(s,SSL_SESS_CACHE_SERVER); | |
802 | ||
803 | s->ctx->stats.sess_accept_good++; | |
804 | /* s->server=1; */ | |
805 | s->handshake_func=ssl3_accept; | |
d02b48c6 | 806 | |
b49124f6 BM |
807 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); |
808 | } | |
809 | ||
681bfae4 | 810 | ret = 1; |
d02b48c6 | 811 | goto end; |
58964a49 | 812 | /* break; */ |
d02b48c6 RE |
813 | |
814 | default: | |
815 | SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE); | |
816 | ret= -1; | |
817 | goto end; | |
58964a49 | 818 | /* break; */ |
d02b48c6 RE |
819 | } |
820 | ||
821 | if (!s->s3->tmp.reuse_message && !skip) | |
822 | { | |
58964a49 RE |
823 | if (s->debug) |
824 | { | |
825 | if ((ret=BIO_flush(s->wbio)) <= 0) | |
826 | goto end; | |
827 | } | |
828 | ||
d02b48c6 RE |
829 | |
830 | if ((cb != NULL) && (s->state != state)) | |
831 | { | |
832 | new_state=s->state; | |
833 | s->state=state; | |
834 | cb(s,SSL_CB_ACCEPT_LOOP,1); | |
835 | s->state=new_state; | |
836 | } | |
837 | } | |
838 | skip=0; | |
839 | } | |
840 | end: | |
841 | /* BIO_flush(s->wbio); */ | |
842 | ||
4d635a70 | 843 | s->in_handshake--; |
d02b48c6 RE |
844 | if (cb != NULL) |
845 | cb(s,SSL_CB_ACCEPT_EXIT,ret); | |
d02b48c6 RE |
846 | return(ret); |
847 | } | |
848 | ||
36d16f8e | 849 | int ssl3_send_hello_request(SSL *s) |
d02b48c6 RE |
850 | { |
851 | unsigned char *p; | |
852 | ||
853 | if (s->state == SSL3_ST_SW_HELLO_REQ_A) | |
854 | { | |
855 | p=(unsigned char *)s->init_buf->data; | |
c51ae173 | 856 | *(p++)=SSL3_MT_HELLO_REQUEST; |
d02b48c6 RE |
857 | *(p++)=0; |
858 | *(p++)=0; | |
859 | *(p++)=0; | |
860 | ||
861 | s->state=SSL3_ST_SW_HELLO_REQ_B; | |
862 | /* number of bytes to write */ | |
863 | s->init_num=4; | |
864 | s->init_off=0; | |
865 | } | |
866 | ||
867 | /* SSL3_ST_SW_HELLO_REQ_B */ | |
868 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
869 | } | |
870 | ||
36d16f8e | 871 | int ssl3_check_client_hello(SSL *s) |
3d14b9d0 DSH |
872 | { |
873 | int ok; | |
874 | long n; | |
875 | ||
b78e5021 BM |
876 | /* this function is called when we really expect a Certificate message, |
877 | * so permit appropriate message length */ | |
36d16f8e | 878 | n=s->method->ssl_get_message(s, |
3d14b9d0 DSH |
879 | SSL3_ST_SR_CERT_A, |
880 | SSL3_ST_SR_CERT_B, | |
881 | -1, | |
c0f5dd07 | 882 | s->max_cert_list, |
3d14b9d0 DSH |
883 | &ok); |
884 | if (!ok) return((int)n); | |
885 | s->s3->tmp.reuse_message = 1; | |
a2a01589 BM |
886 | if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO) |
887 | { | |
206310c3 DSH |
888 | /* We only allow the client to restart the handshake once per |
889 | * negotiation. */ | |
890 | if (s->s3->flags & SSL3_FLAGS_SGC_RESTART_DONE) | |
891 | { | |
892 | SSLerr(SSL_F_SSL3_CHECK_CLIENT_HELLO, SSL_R_MULTIPLE_SGC_RESTARTS); | |
893 | return -1; | |
894 | } | |
a2a01589 | 895 | /* Throw away what we have done so far in the current handshake, |
e7928282 | 896 | * which will now be aborted. (A full SSL_clear would be too much.) */ |
bc36ee62 | 897 | #ifndef OPENSSL_NO_DH |
a2a01589 BM |
898 | if (s->s3->tmp.dh != NULL) |
899 | { | |
900 | DH_free(s->s3->tmp.dh); | |
901 | s->s3->tmp.dh = NULL; | |
902 | } | |
e7928282 BM |
903 | #endif |
904 | #ifndef OPENSSL_NO_ECDH | |
905 | if (s->s3->tmp.ecdh != NULL) | |
906 | { | |
907 | EC_KEY_free(s->s3->tmp.ecdh); | |
908 | s->s3->tmp.ecdh = NULL; | |
909 | } | |
a2a01589 | 910 | #endif |
d0dc991c | 911 | s->s3->flags |= SSL3_FLAGS_SGC_RESTART_DONE; |
a2a01589 BM |
912 | return 2; |
913 | } | |
3d14b9d0 DSH |
914 | return 1; |
915 | } | |
916 | ||
36d16f8e | 917 | int ssl3_get_client_hello(SSL *s) |
d02b48c6 RE |
918 | { |
919 | int i,j,ok,al,ret= -1; | |
6c61726b | 920 | unsigned int cookie_len; |
d02b48c6 RE |
921 | long n; |
922 | unsigned long id; | |
413c4f45 | 923 | unsigned char *p,*d,*q; |
d02b48c6 | 924 | SSL_CIPHER *c; |
09b6c2ef | 925 | #ifndef OPENSSL_NO_COMP |
413c4f45 | 926 | SSL_COMP *comp=NULL; |
09b6c2ef | 927 | #endif |
f73e07cf | 928 | STACK_OF(SSL_CIPHER) *ciphers=NULL; |
d02b48c6 | 929 | |
58964a49 RE |
930 | /* We do this so that we will respond with our native type. |
931 | * If we are TLSv1 and we get SSLv3, we will respond with TLSv1, | |
932 | * This down switching should be handled by a different method. | |
933 | * If we are SSLv3, we will respond with SSLv3, even if prompted with | |
934 | * TLSv1. | |
935 | */ | |
edc032b5 | 936 | if (s->state == SSL3_ST_SR_CLNT_HELLO_A |
edc032b5 | 937 | ) |
d02b48c6 | 938 | { |
d02b48c6 RE |
939 | s->state=SSL3_ST_SR_CLNT_HELLO_B; |
940 | } | |
1e24b3a0 | 941 | s->first_packet=1; |
36d16f8e | 942 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
943 | SSL3_ST_SR_CLNT_HELLO_B, |
944 | SSL3_ST_SR_CLNT_HELLO_C, | |
945 | SSL3_MT_CLIENT_HELLO, | |
946 | SSL3_RT_MAX_PLAIN_LENGTH, | |
947 | &ok); | |
948 | ||
949 | if (!ok) return((int)n); | |
1e24b3a0 | 950 | s->first_packet=0; |
48948d53 | 951 | d=p=(unsigned char *)s->init_msg; |
d02b48c6 | 952 | |
074309b7 BM |
953 | /* use version from inside client hello, not from record header |
954 | * (may differ: see RFC 2246, Appendix E, second paragraph) */ | |
955 | s->client_version=(((int)p[0])<<8)|(int)p[1]; | |
d02b48c6 RE |
956 | p+=2; |
957 | ||
7432d073 AP |
958 | if ((s->version == DTLS1_VERSION && s->client_version > s->version) || |
959 | (s->version != DTLS1_VERSION && s->client_version < s->version)) | |
a661b653 BM |
960 | { |
961 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER); | |
89bbe14c | 962 | if ((s->client_version>>8) == SSL3_VERSION_MAJOR) |
a661b653 BM |
963 | { |
964 | /* similar to ssl3_get_record, send alert using remote version number */ | |
965 | s->version = s->client_version; | |
966 | } | |
967 | al = SSL_AD_PROTOCOL_VERSION; | |
968 | goto f_err; | |
969 | } | |
970 | ||
07a9d1a2 DSH |
971 | /* If we require cookies and this ClientHello doesn't |
972 | * contain one, just return since we do not want to | |
973 | * allocate any memory yet. So check cookie length... | |
974 | */ | |
975 | if (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) | |
976 | { | |
977 | unsigned int session_length, cookie_length; | |
978 | ||
979 | session_length = *(p + SSL3_RANDOM_SIZE); | |
980 | cookie_length = *(p + SSL3_RANDOM_SIZE + session_length + 1); | |
981 | ||
14b148d3 | 982 | if (cookie_length == 0) |
07a9d1a2 DSH |
983 | return 1; |
984 | } | |
985 | ||
d02b48c6 RE |
986 | /* load the client random */ |
987 | memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE); | |
988 | p+=SSL3_RANDOM_SIZE; | |
989 | ||
990 | /* get the session-id */ | |
991 | j= *(p++); | |
992 | ||
993 | s->hit=0; | |
c519e89f BM |
994 | /* Versions before 0.9.7 always allow clients to resume sessions in renegotiation. |
995 | * 0.9.7 and later allow this by default, but optionally ignore resumption requests | |
996 | * with flag SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION (it's a new flag rather | |
997 | * than a change to default behavior so that applications relying on this for security | |
998 | * won't even compile against older library versions). | |
999 | * | |
1000 | * 1.0.1 and later also have a function SSL_renegotiate_abbreviated() to request | |
1001 | * renegotiation but not a new session (s->new_session remains unset): for servers, | |
1002 | * this essentially just means that the SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION | |
1003 | * setting will be ignored. | |
6b0e9fac | 1004 | */ |
6434abbf | 1005 | if ((s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION))) |
d02b48c6 RE |
1006 | { |
1007 | if (!ssl_get_new_session(s,1)) | |
1008 | goto err; | |
1009 | } | |
1010 | else | |
1011 | { | |
6434abbf | 1012 | i=ssl_get_prev_session(s, p, j, d + n); |
d02b48c6 RE |
1013 | if (i == 1) |
1014 | { /* previous session */ | |
1015 | s->hit=1; | |
1016 | } | |
8876bc05 BM |
1017 | else if (i == -1) |
1018 | goto err; | |
1019 | else /* i == 0 */ | |
d02b48c6 RE |
1020 | { |
1021 | if (!ssl_get_new_session(s,1)) | |
1022 | goto err; | |
1023 | } | |
1024 | } | |
1025 | ||
1026 | p+=j; | |
36d16f8e | 1027 | |
07a9d1a2 | 1028 | if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER) |
36d16f8e BL |
1029 | { |
1030 | /* cookie stuff */ | |
1031 | cookie_len = *(p++); | |
1032 | ||
beb056b3 BM |
1033 | /* |
1034 | * The ClientHello may contain a cookie even if the | |
1035 | * HelloVerify message has not been sent--make sure that it | |
1036 | * does not cause an overflow. | |
1037 | */ | |
36d16f8e BL |
1038 | if ( cookie_len > sizeof(s->d1->rcvd_cookie)) |
1039 | { | |
1040 | /* too much data */ | |
beb056b3 | 1041 | al = SSL_AD_DECODE_ERROR; |
36d16f8e BL |
1042 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH); |
1043 | goto f_err; | |
1044 | } | |
1045 | ||
beb056b3 | 1046 | /* verify the cookie if appropriate option is set. */ |
07a9d1a2 | 1047 | if ((SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) && |
beb056b3 BM |
1048 | cookie_len > 0) |
1049 | { | |
1050 | memcpy(s->d1->rcvd_cookie, p, cookie_len); | |
1051 | ||
1052 | if ( s->ctx->app_verify_cookie_cb != NULL) | |
1053 | { | |
1054 | if ( s->ctx->app_verify_cookie_cb(s, s->d1->rcvd_cookie, | |
1055 | cookie_len) == 0) | |
1056 | { | |
1057 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1058 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, | |
1059 | SSL_R_COOKIE_MISMATCH); | |
1060 | goto f_err; | |
1061 | } | |
1062 | /* else cookie verification succeeded */ | |
1063 | } | |
1064 | else if ( memcmp(s->d1->rcvd_cookie, s->d1->cookie, | |
1065 | s->d1->cookie_len) != 0) /* default verification */ | |
1066 | { | |
1067 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1068 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, | |
1069 | SSL_R_COOKIE_MISMATCH); | |
1070 | goto f_err; | |
1071 | } | |
07a9d1a2 DSH |
1072 | |
1073 | ret = 2; | |
beb056b3 BM |
1074 | } |
1075 | ||
1076 | p += cookie_len; | |
36d16f8e BL |
1077 | } |
1078 | ||
d02b48c6 RE |
1079 | n2s(p,i); |
1080 | if ((i == 0) && (j != 0)) | |
1081 | { | |
1082 | /* we need a cipher if we are not resuming a session */ | |
58964a49 | 1083 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
1084 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED); |
1085 | goto f_err; | |
1086 | } | |
82b0bf0b | 1087 | if ((p+i) >= (d+n)) |
d02b48c6 RE |
1088 | { |
1089 | /* not enough data */ | |
58964a49 | 1090 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1091 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); |
1092 | goto f_err; | |
1093 | } | |
1094 | if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers)) | |
1095 | == NULL)) | |
1096 | { | |
1097 | goto err; | |
1098 | } | |
1099 | p+=i; | |
1100 | ||
1101 | /* If it is a hit, check that the cipher is in the list */ | |
1102 | if ((s->hit) && (i > 0)) | |
1103 | { | |
1104 | j=0; | |
1105 | id=s->session->cipher->id; | |
1106 | ||
413c4f45 MC |
1107 | #ifdef CIPHER_DEBUG |
1108 | printf("client sent %d ciphers\n",sk_num(ciphers)); | |
1109 | #endif | |
f73e07cf | 1110 | for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++) |
d02b48c6 | 1111 | { |
f73e07cf | 1112 | c=sk_SSL_CIPHER_value(ciphers,i); |
413c4f45 MC |
1113 | #ifdef CIPHER_DEBUG |
1114 | printf("client [%2d of %2d]:%s\n", | |
1115 | i,sk_num(ciphers),SSL_CIPHER_get_name(c)); | |
1116 | #endif | |
d02b48c6 RE |
1117 | if (c->id == id) |
1118 | { | |
1119 | j=1; | |
1120 | break; | |
1121 | } | |
1122 | } | |
88f2a4cf BM |
1123 | /* Disabled because it can be used in a ciphersuite downgrade |
1124 | * attack: CVE-2010-4180. | |
1125 | */ | |
1126 | #if 0 | |
837f2fc7 | 1127 | if (j == 0 && (s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1)) |
d02b48c6 | 1128 | { |
837f2fc7 BM |
1129 | /* Special case as client bug workaround: the previously used cipher may |
1130 | * not be in the current list, the client instead might be trying to | |
1131 | * continue using a cipher that before wasn't chosen due to server | |
1132 | * preferences. We'll have to reject the connection if the cipher is not | |
1133 | * enabled, though. */ | |
1134 | c = sk_SSL_CIPHER_value(ciphers, 0); | |
1135 | if (sk_SSL_CIPHER_find(SSL_get_ciphers(s), c) >= 0) | |
d02b48c6 | 1136 | { |
837f2fc7 BM |
1137 | s->session->cipher = c; |
1138 | j = 1; | |
d02b48c6 RE |
1139 | } |
1140 | } | |
88f2a4cf | 1141 | #endif |
837f2fc7 BM |
1142 | if (j == 0) |
1143 | { | |
1144 | /* we need to have the cipher in the cipher | |
1145 | * list if we are asked to reuse it */ | |
1146 | al=SSL_AD_ILLEGAL_PARAMETER; | |
1147 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING); | |
1148 | goto f_err; | |
1149 | } | |
d02b48c6 RE |
1150 | } |
1151 | ||
1152 | /* compression */ | |
1153 | i= *(p++); | |
82b0bf0b BM |
1154 | if ((p+i) > (d+n)) |
1155 | { | |
1156 | /* not enough data */ | |
1157 | al=SSL_AD_DECODE_ERROR; | |
1158 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); | |
1159 | goto f_err; | |
1160 | } | |
413c4f45 | 1161 | q=p; |
d02b48c6 | 1162 | for (j=0; j<i; j++) |
413c4f45 | 1163 | { |
d02b48c6 | 1164 | if (p[j] == 0) break; |
413c4f45 | 1165 | } |
d02b48c6 RE |
1166 | |
1167 | p+=i; | |
1168 | if (j >= i) | |
1169 | { | |
1170 | /* no compress */ | |
58964a49 | 1171 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1172 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED); |
1173 | goto f_err; | |
1174 | } | |
1175 | ||
58ece833 BM |
1176 | #ifndef OPENSSL_NO_TLSEXT |
1177 | /* TLS extensions*/ | |
13f6d57b | 1178 | if (s->version >= SSL3_VERSION) |
58ece833 BM |
1179 | { |
1180 | if (!ssl_parse_clienthello_tlsext(s,&p,d,n, &al)) | |
1181 | { | |
1182 | /* 'al' set by ssl_parse_clienthello_tlsext */ | |
36ca4ba6 | 1183 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_PARSE_TLSEXT); |
58ece833 BM |
1184 | goto f_err; |
1185 | } | |
1186 | } | |
36ca4ba6 | 1187 | if (ssl_check_clienthello_tlsext(s) <= 0) { |
a291745e | 1188 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); |
58ece833 BM |
1189 | goto err; |
1190 | } | |
12bf56c0 DSH |
1191 | |
1192 | /* Check if we want to use external pre-shared secret for this | |
1193 | * handshake for not reused session only. We need to generate | |
1194 | * server_random before calling tls_session_secret_cb in order to allow | |
1195 | * SessionTicket processing to use it in key derivation. */ | |
1196 | { | |
1197 | unsigned long Time; | |
1198 | unsigned char *pos; | |
1199 | Time=(unsigned long)time(NULL); /* Time */ | |
1200 | pos=s->s3->server_random; | |
1201 | l2n(Time,pos); | |
1202 | if (RAND_pseudo_bytes(pos,SSL3_RANDOM_SIZE-4) <= 0) | |
1203 | { | |
1204 | al=SSL_AD_INTERNAL_ERROR; | |
1205 | goto f_err; | |
1206 | } | |
1207 | } | |
1208 | ||
1209 | if (!s->hit && s->version >= TLS1_VERSION && s->tls_session_secret_cb) | |
1210 | { | |
1211 | SSL_CIPHER *pref_cipher=NULL; | |
1212 | ||
1213 | s->session->master_key_length=sizeof(s->session->master_key); | |
1214 | if(s->tls_session_secret_cb(s, s->session->master_key, &s->session->master_key_length, | |
1215 | ciphers, &pref_cipher, s->tls_session_secret_cb_arg)) | |
1216 | { | |
1217 | s->hit=1; | |
1218 | s->session->ciphers=ciphers; | |
1219 | s->session->verify_result=X509_V_OK; | |
1220 | ||
1221 | ciphers=NULL; | |
1222 | ||
1223 | /* check if some cipher was preferred by call back */ | |
1224 | pref_cipher=pref_cipher ? pref_cipher : ssl3_choose_cipher(s, s->session->ciphers, SSL_get_ciphers(s)); | |
1225 | if (pref_cipher == NULL) | |
1226 | { | |
1227 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1228 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER); | |
1229 | goto f_err; | |
1230 | } | |
1231 | ||
1232 | s->session->cipher=pref_cipher; | |
1233 | ||
1234 | if (s->cipher_list) | |
1235 | sk_SSL_CIPHER_free(s->cipher_list); | |
1236 | ||
1237 | if (s->cipher_list_by_id) | |
1238 | sk_SSL_CIPHER_free(s->cipher_list_by_id); | |
1239 | ||
1240 | s->cipher_list = sk_SSL_CIPHER_dup(s->session->ciphers); | |
1241 | s->cipher_list_by_id = sk_SSL_CIPHER_dup(s->session->ciphers); | |
1242 | } | |
1243 | } | |
58ece833 BM |
1244 | #endif |
1245 | ||
413c4f45 MC |
1246 | /* Worst case, we will use the NULL compression, but if we have other |
1247 | * options, we will now look for them. We have i-1 compression | |
1248 | * algorithms from the client, starting at q. */ | |
1249 | s->s3->tmp.new_compression=NULL; | |
09b6c2ef | 1250 | #ifndef OPENSSL_NO_COMP |
e6f418bc DSH |
1251 | /* This only happens if we have a cache hit */ |
1252 | if (s->session->compress_meth != 0) | |
1253 | { | |
1254 | int m, comp_id = s->session->compress_meth; | |
1255 | /* Perform sanity checks on resumed compression algorithm */ | |
1256 | /* Can't disable compression */ | |
1257 | if (s->options & SSL_OP_NO_COMPRESSION) | |
1258 | { | |
1259 | al=SSL_AD_INTERNAL_ERROR; | |
1260 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INCONSISTENT_COMPRESSION); | |
1261 | goto f_err; | |
1262 | } | |
1263 | /* Look for resumed compression method */ | |
1264 | for (m = 0; m < sk_SSL_COMP_num(s->ctx->comp_methods); m++) | |
1265 | { | |
1266 | comp=sk_SSL_COMP_value(s->ctx->comp_methods,m); | |
1267 | if (comp_id == comp->id) | |
1268 | { | |
1269 | s->s3->tmp.new_compression=comp; | |
1270 | break; | |
1271 | } | |
1272 | } | |
1273 | if (s->s3->tmp.new_compression == NULL) | |
1274 | { | |
1275 | al=SSL_AD_INTERNAL_ERROR; | |
1276 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INVALID_COMPRESSION_ALGORITHM); | |
1277 | goto f_err; | |
1278 | } | |
1279 | /* Look for resumed method in compression list */ | |
1280 | for (m = 0; m < i; m++) | |
1281 | { | |
1282 | if (q[m] == comp_id) | |
1283 | break; | |
1284 | } | |
1285 | if (m >= i) | |
1286 | { | |
1287 | al=SSL_AD_ILLEGAL_PARAMETER; | |
1288 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_COMPRESSSION_ALGORITHM_MISSING); | |
1289 | goto f_err; | |
1290 | } | |
1291 | } | |
1292 | else if (s->hit) | |
1293 | comp = NULL; | |
1294 | else if (!(s->options & SSL_OP_NO_COMPRESSION) && s->ctx->comp_methods) | |
413c4f45 MC |
1295 | { /* See if we have a match */ |
1296 | int m,nn,o,v,done=0; | |
1297 | ||
f73e07cf | 1298 | nn=sk_SSL_COMP_num(s->ctx->comp_methods); |
413c4f45 MC |
1299 | for (m=0; m<nn; m++) |
1300 | { | |
f73e07cf | 1301 | comp=sk_SSL_COMP_value(s->ctx->comp_methods,m); |
413c4f45 MC |
1302 | v=comp->id; |
1303 | for (o=0; o<i; o++) | |
1304 | { | |
1305 | if (v == q[o]) | |
1306 | { | |
1307 | done=1; | |
1308 | break; | |
1309 | } | |
1310 | } | |
1311 | if (done) break; | |
1312 | } | |
1313 | if (done) | |
1314 | s->s3->tmp.new_compression=comp; | |
1315 | else | |
1316 | comp=NULL; | |
1317 | } | |
e6f418bc DSH |
1318 | #else |
1319 | /* If compression is disabled we'd better not try to resume a session | |
1320 | * using compression. | |
1321 | */ | |
2be3d6eb | 1322 | if (s->session->compress_meth != 0) |
e6f418bc DSH |
1323 | { |
1324 | al=SSL_AD_INTERNAL_ERROR; | |
1325 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INCONSISTENT_COMPRESSION); | |
1326 | goto f_err; | |
1327 | } | |
09b6c2ef | 1328 | #endif |
413c4f45 | 1329 | |
836f9960 | 1330 | /* Given s->session->ciphers and SSL_get_ciphers, we must |
d02b48c6 RE |
1331 | * pick a cipher */ |
1332 | ||
1333 | if (!s->hit) | |
1334 | { | |
09b6c2ef DSH |
1335 | #ifdef OPENSSL_NO_COMP |
1336 | s->session->compress_meth=0; | |
1337 | #else | |
413c4f45 | 1338 | s->session->compress_meth=(comp == NULL)?0:comp->id; |
09b6c2ef | 1339 | #endif |
d02b48c6 | 1340 | if (s->session->ciphers != NULL) |
f73e07cf | 1341 | sk_SSL_CIPHER_free(s->session->ciphers); |
d02b48c6 RE |
1342 | s->session->ciphers=ciphers; |
1343 | if (ciphers == NULL) | |
1344 | { | |
58964a49 | 1345 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
1346 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED); |
1347 | goto f_err; | |
1348 | } | |
1349 | ciphers=NULL; | |
1350 | c=ssl3_choose_cipher(s,s->session->ciphers, | |
836f9960 | 1351 | SSL_get_ciphers(s)); |
d02b48c6 RE |
1352 | |
1353 | if (c == NULL) | |
1354 | { | |
58964a49 | 1355 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1356 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER); |
1357 | goto f_err; | |
1358 | } | |
1359 | s->s3->tmp.new_cipher=c; | |
7c2d4fee BM |
1360 | /* check whether we should disable session resumption */ |
1361 | if (s->not_resumable_session_cb != NULL) | |
1362 | s->session->not_resumable=s->not_resumable_session_cb(s, | |
1363 | ((c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH)) != 0)); | |
1364 | if (s->session->not_resumable) | |
1365 | /* do not send a session ticket */ | |
1366 | s->tlsext_ticket_expected = 0; | |
d02b48c6 RE |
1367 | } |
1368 | else | |
1369 | { | |
1370 | /* Session-id reuse */ | |
1371 | #ifdef REUSE_CIPHER_BUG | |
f73e07cf | 1372 | STACK_OF(SSL_CIPHER) *sk; |
d02b48c6 RE |
1373 | SSL_CIPHER *nc=NULL; |
1374 | SSL_CIPHER *ec=NULL; | |
1375 | ||
58964a49 | 1376 | if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG) |
d02b48c6 RE |
1377 | { |
1378 | sk=s->session->ciphers; | |
f73e07cf | 1379 | for (i=0; i<sk_SSL_CIPHER_num(sk); i++) |
d02b48c6 | 1380 | { |
f73e07cf | 1381 | c=sk_SSL_CIPHER_value(sk,i); |
52b8dad8 | 1382 | if (c->algorithm_enc & SSL_eNULL) |
d02b48c6 | 1383 | nc=c; |
06ab81f9 | 1384 | if (SSL_C_IS_EXPORT(c)) |
d02b48c6 RE |
1385 | ec=c; |
1386 | } | |
1387 | if (nc != NULL) | |
1388 | s->s3->tmp.new_cipher=nc; | |
1389 | else if (ec != NULL) | |
1390 | s->s3->tmp.new_cipher=ec; | |
1391 | else | |
1392 | s->s3->tmp.new_cipher=s->session->cipher; | |
1393 | } | |
1394 | else | |
1395 | #endif | |
1396 | s->s3->tmp.new_cipher=s->session->cipher; | |
1397 | } | |
30551400 | 1398 | |
238b6361 | 1399 | if (TLS1_get_version(s) < TLS1_2_VERSION || !(s->verify_mode & SSL_VERIFY_PEER)) |
f37f20ff DSH |
1400 | { |
1401 | if (!ssl3_digest_cached_records(s)) | |
1402 | goto f_err; | |
1403 | } | |
d02b48c6 RE |
1404 | |
1405 | /* we now have the following setup. | |
1406 | * client_random | |
1407 | * cipher_list - our prefered list of ciphers | |
1408 | * ciphers - the clients prefered list of ciphers | |
1409 | * compression - basically ignored right now | |
1410 | * ssl version is set - sslv3 | |
1411 | * s->session - The ssl session has been setup. | |
657e60fa | 1412 | * s->hit - session reuse flag |
d02b48c6 RE |
1413 | * s->tmp.new_cipher - the new cipher to use. |
1414 | */ | |
1415 | ||
07a9d1a2 | 1416 | if (ret < 0) ret=1; |
d02b48c6 RE |
1417 | if (0) |
1418 | { | |
1419 | f_err: | |
1420 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1421 | } | |
1422 | err: | |
f73e07cf | 1423 | if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers); |
d02b48c6 RE |
1424 | return(ret); |
1425 | } | |
1426 | ||
36d16f8e | 1427 | int ssl3_send_server_hello(SSL *s) |
d02b48c6 RE |
1428 | { |
1429 | unsigned char *buf; | |
1430 | unsigned char *p,*d; | |
1431 | int i,sl; | |
12bf56c0 DSH |
1432 | unsigned long l; |
1433 | #ifdef OPENSSL_NO_TLSEXT | |
1434 | unsigned long Time; | |
1435 | #endif | |
d02b48c6 RE |
1436 | |
1437 | if (s->state == SSL3_ST_SW_SRVR_HELLO_A) | |
1438 | { | |
1439 | buf=(unsigned char *)s->init_buf->data; | |
12bf56c0 | 1440 | #ifdef OPENSSL_NO_TLSEXT |
d02b48c6 | 1441 | p=s->s3->server_random; |
12bf56c0 | 1442 | /* Generate server_random if it was not needed previously */ |
7bbcb2f6 | 1443 | Time=(unsigned long)time(NULL); /* Time */ |
d02b48c6 | 1444 | l2n(Time,p); |
7c7667b8 NL |
1445 | if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) |
1446 | return -1; | |
12bf56c0 | 1447 | #endif |
d02b48c6 RE |
1448 | /* Do the message type and length last */ |
1449 | d=p= &(buf[4]); | |
1450 | ||
58964a49 RE |
1451 | *(p++)=s->version>>8; |
1452 | *(p++)=s->version&0xff; | |
d02b48c6 RE |
1453 | |
1454 | /* Random stuff */ | |
1455 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
1456 | p+=SSL3_RANDOM_SIZE; | |
1457 | ||
c519e89f BM |
1458 | /* There are several cases for the session ID to send |
1459 | * back in the server hello: | |
1460 | * - For session reuse from the session cache, | |
1461 | * we send back the old session ID. | |
1462 | * - If stateless session reuse (using a session ticket) | |
1463 | * is successful, we send back the client's "session ID" | |
1464 | * (which doesn't actually identify the session). | |
1465 | * - If it is a new session, we send back the new | |
1466 | * session ID. | |
1467 | * - However, if we want the new session to be single-use, | |
1468 | * we send back a 0-length session ID. | |
1469 | * s->hit is non-zero in either case of session reuse, | |
1470 | * so the following won't overwrite an ID that we're supposed | |
1471 | * to send back. | |
d02b48c6 | 1472 | */ |
7c2d4fee BM |
1473 | if (s->session->not_resumable || |
1474 | (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER) | |
1475 | && !s->hit)) | |
58964a49 | 1476 | s->session->session_id_length=0; |
d02b48c6 RE |
1477 | |
1478 | sl=s->session->session_id_length; | |
27545970 | 1479 | if (sl > (int)sizeof(s->session->session_id)) |
5574e0ed BM |
1480 | { |
1481 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1482 | return -1; | |
1483 | } | |
d02b48c6 RE |
1484 | *(p++)=sl; |
1485 | memcpy(p,s->session->session_id,sl); | |
1486 | p+=sl; | |
1487 | ||
1488 | /* put the cipher */ | |
1489 | i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p); | |
1490 | p+=i; | |
1491 | ||
1492 | /* put the compression method */ | |
09b6c2ef DSH |
1493 | #ifdef OPENSSL_NO_COMP |
1494 | *(p++)=0; | |
1495 | #else | |
413c4f45 MC |
1496 | if (s->s3->tmp.new_compression == NULL) |
1497 | *(p++)=0; | |
1498 | else | |
1499 | *(p++)=s->s3->tmp.new_compression->id; | |
09b6c2ef | 1500 | #endif |
ed3883d2 | 1501 | #ifndef OPENSSL_NO_TLSEXT |
36ca4ba6 BM |
1502 | if (ssl_prepare_serverhello_tlsext(s) <= 0) |
1503 | { | |
1504 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); | |
1505 | return -1; | |
1506 | } | |
f1fd4544 BM |
1507 | if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) |
1508 | { | |
ed3883d2 BM |
1509 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR); |
1510 | return -1; | |
f1fd4544 | 1511 | } |
ed3883d2 | 1512 | #endif |
d02b48c6 RE |
1513 | /* do the header */ |
1514 | l=(p-d); | |
1515 | d=buf; | |
1516 | *(d++)=SSL3_MT_SERVER_HELLO; | |
1517 | l2n3(l,d); | |
1518 | ||
fcbdde0d | 1519 | s->state=SSL3_ST_SW_SRVR_HELLO_B; |
d02b48c6 RE |
1520 | /* number of bytes to write */ |
1521 | s->init_num=p-buf; | |
1522 | s->init_off=0; | |
1523 | } | |
1524 | ||
fcbdde0d | 1525 | /* SSL3_ST_SW_SRVR_HELLO_B */ |
d02b48c6 RE |
1526 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); |
1527 | } | |
1528 | ||
36d16f8e | 1529 | int ssl3_send_server_done(SSL *s) |
d02b48c6 RE |
1530 | { |
1531 | unsigned char *p; | |
1532 | ||
1533 | if (s->state == SSL3_ST_SW_SRVR_DONE_A) | |
1534 | { | |
1535 | p=(unsigned char *)s->init_buf->data; | |
1536 | ||
1537 | /* do the header */ | |
1538 | *(p++)=SSL3_MT_SERVER_DONE; | |
1539 | *(p++)=0; | |
1540 | *(p++)=0; | |
1541 | *(p++)=0; | |
1542 | ||
1543 | s->state=SSL3_ST_SW_SRVR_DONE_B; | |
1544 | /* number of bytes to write */ | |
1545 | s->init_num=4; | |
1546 | s->init_off=0; | |
1547 | } | |
1548 | ||
e65bcbce | 1549 | /* SSL3_ST_SW_SRVR_DONE_B */ |
d02b48c6 RE |
1550 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); |
1551 | } | |
1552 | ||
36d16f8e | 1553 | int ssl3_send_server_key_exchange(SSL *s) |
d02b48c6 | 1554 | { |
bc36ee62 | 1555 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
1556 | unsigned char *q; |
1557 | int j,num; | |
1558 | RSA *rsa; | |
1559 | unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; | |
752d706a | 1560 | unsigned int u; |
d02b48c6 | 1561 | #endif |
bc36ee62 | 1562 | #ifndef OPENSSL_NO_DH |
9d1a01be | 1563 | DH *dh=NULL,*dhp; |
ea262260 BM |
1564 | #endif |
1565 | #ifndef OPENSSL_NO_ECDH | |
1566 | EC_KEY *ecdh=NULL, *ecdhp; | |
1567 | unsigned char *encodedPoint = NULL; | |
1568 | int encodedlen = 0; | |
1569 | int curve_id = 0; | |
1570 | BN_CTX *bn_ctx = NULL; | |
d02b48c6 RE |
1571 | #endif |
1572 | EVP_PKEY *pkey; | |
6b7be581 | 1573 | const EVP_MD *md = NULL; |
d02b48c6 RE |
1574 | unsigned char *p,*d; |
1575 | int al,i; | |
1576 | unsigned long type; | |
1577 | int n; | |
1578 | CERT *cert; | |
1579 | BIGNUM *r[4]; | |
1580 | int nr[4],kn; | |
1581 | BUF_MEM *buf; | |
1582 | EVP_MD_CTX md_ctx; | |
1583 | ||
dbad1690 | 1584 | EVP_MD_CTX_init(&md_ctx); |
d02b48c6 RE |
1585 | if (s->state == SSL3_ST_SW_KEY_EXCH_A) |
1586 | { | |
52b8dad8 | 1587 | type=s->s3->tmp.new_cipher->algorithm_mkey; |
b56bce4f | 1588 | cert=s->cert; |
d02b48c6 RE |
1589 | |
1590 | buf=s->init_buf; | |
1591 | ||
1592 | r[0]=r[1]=r[2]=r[3]=NULL; | |
1593 | n=0; | |
bc36ee62 | 1594 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
1595 | if (type & SSL_kRSA) |
1596 | { | |
1597 | rsa=cert->rsa_tmp; | |
ca8e5b9b | 1598 | if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL)) |
d02b48c6 | 1599 | { |
ca8e5b9b | 1600 | rsa=s->cert->rsa_tmp_cb(s, |
f415fa32 | 1601 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), |
60e31c3a | 1602 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); |
fbb41ae0 DSH |
1603 | if(rsa == NULL) |
1604 | { | |
1605 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1606 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY); | |
1607 | goto f_err; | |
1608 | } | |
6ac4e8bd | 1609 | RSA_up_ref(rsa); |
d02b48c6 RE |
1610 | cert->rsa_tmp=rsa; |
1611 | } | |
1612 | if (rsa == NULL) | |
1613 | { | |
58964a49 | 1614 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1615 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY); |
1616 | goto f_err; | |
1617 | } | |
1618 | r[0]=rsa->n; | |
1619 | r[1]=rsa->e; | |
1620 | s->s3->tmp.use_rsa_tmp=1; | |
1621 | } | |
1622 | else | |
1623 | #endif | |
bc36ee62 | 1624 | #ifndef OPENSSL_NO_DH |
d02b48c6 RE |
1625 | if (type & SSL_kEDH) |
1626 | { | |
1627 | dhp=cert->dh_tmp; | |
ca8e5b9b BM |
1628 | if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL)) |
1629 | dhp=s->cert->dh_tmp_cb(s, | |
2c05c494 | 1630 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), |
60e31c3a | 1631 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); |
d02b48c6 RE |
1632 | if (dhp == NULL) |
1633 | { | |
58964a49 | 1634 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1635 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
1636 | goto f_err; | |
1637 | } | |
a87030a1 BM |
1638 | |
1639 | if (s->s3->tmp.dh != NULL) | |
1640 | { | |
5277d7cb | 1641 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
a87030a1 BM |
1642 | goto err; |
1643 | } | |
1644 | ||
d02b48c6 RE |
1645 | if ((dh=DHparams_dup(dhp)) == NULL) |
1646 | { | |
1647 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1648 | goto err; | |
1649 | } | |
1650 | ||
1651 | s->s3->tmp.dh=dh; | |
6fa89f94 BL |
1652 | if ((dhp->pub_key == NULL || |
1653 | dhp->priv_key == NULL || | |
1654 | (s->options & SSL_OP_SINGLE_DH_USE))) | |
d02b48c6 | 1655 | { |
6fa89f94 BL |
1656 | if(!DH_generate_key(dh)) |
1657 | { | |
1658 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, | |
1659 | ERR_R_DH_LIB); | |
1660 | goto err; | |
1661 | } | |
d02b48c6 RE |
1662 | } |
1663 | else | |
1664 | { | |
1665 | dh->pub_key=BN_dup(dhp->pub_key); | |
1666 | dh->priv_key=BN_dup(dhp->priv_key); | |
1667 | if ((dh->pub_key == NULL) || | |
1668 | (dh->priv_key == NULL)) | |
1669 | { | |
1670 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1671 | goto err; | |
1672 | } | |
1673 | } | |
1674 | r[0]=dh->p; | |
1675 | r[1]=dh->g; | |
1676 | r[2]=dh->pub_key; | |
1677 | } | |
1678 | else | |
1679 | #endif | |
ea262260 | 1680 | #ifndef OPENSSL_NO_ECDH |
89bbe14c | 1681 | if (type & SSL_kEECDH) |
ea262260 | 1682 | { |
9dd84053 NL |
1683 | const EC_GROUP *group; |
1684 | ||
ea262260 | 1685 | ecdhp=cert->ecdh_tmp; |
a4352630 DSH |
1686 | if (s->cert->ecdh_tmp_auto) |
1687 | { | |
1688 | /* Get NID of first shared curve */ | |
1689 | int nid = tls1_shared_curve(s, 0); | |
1690 | if (nid != NID_undef) | |
1691 | ecdhp = EC_KEY_new_by_curve_name(nid); | |
1692 | } | |
1693 | else if ((ecdhp == NULL) && s->cert->ecdh_tmp_cb) | |
ea262260 BM |
1694 | { |
1695 | ecdhp=s->cert->ecdh_tmp_cb(s, | |
1696 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), | |
1697 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); | |
1698 | } | |
1699 | if (ecdhp == NULL) | |
1700 | { | |
1701 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1702 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); | |
1703 | goto f_err; | |
1704 | } | |
1705 | ||
1706 | if (s->s3->tmp.ecdh != NULL) | |
1707 | { | |
ea262260 BM |
1708 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
1709 | goto err; | |
1710 | } | |
1711 | ||
1712 | /* Duplicate the ECDH structure. */ | |
1713 | if (ecdhp == NULL) | |
1714 | { | |
1715 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1716 | goto err; | |
1717 | } | |
a4352630 DSH |
1718 | if (s->cert->ecdh_tmp_auto) |
1719 | ecdh = ecdhp; | |
1720 | else if ((ecdh = EC_KEY_dup(ecdhp)) == NULL) | |
ea262260 | 1721 | { |
aa4ce731 | 1722 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); |
ea262260 BM |
1723 | goto err; |
1724 | } | |
ea262260 BM |
1725 | |
1726 | s->s3->tmp.ecdh=ecdh; | |
9dd84053 NL |
1727 | if ((EC_KEY_get0_public_key(ecdh) == NULL) || |
1728 | (EC_KEY_get0_private_key(ecdh) == NULL) || | |
ea262260 BM |
1729 | (s->options & SSL_OP_SINGLE_ECDH_USE)) |
1730 | { | |
1731 | if(!EC_KEY_generate_key(ecdh)) | |
1732 | { | |
1733 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1734 | goto err; | |
1735 | } | |
1736 | } | |
1737 | ||
9dd84053 NL |
1738 | if (((group = EC_KEY_get0_group(ecdh)) == NULL) || |
1739 | (EC_KEY_get0_public_key(ecdh) == NULL) || | |
1740 | (EC_KEY_get0_private_key(ecdh) == NULL)) | |
ea262260 BM |
1741 | { |
1742 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1743 | goto err; | |
1744 | } | |
1745 | ||
1746 | if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && | |
9dd84053 | 1747 | (EC_GROUP_get_degree(group) > 163)) |
ea262260 BM |
1748 | { |
1749 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); | |
1750 | goto err; | |
1751 | } | |
1752 | ||
1753 | /* XXX: For now, we only support ephemeral ECDH | |
1754 | * keys over named (not generic) curves. For | |
1755 | * supported named curves, curve_id is non-zero. | |
1756 | */ | |
1757 | if ((curve_id = | |
33273721 | 1758 | tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group))) |
ea262260 BM |
1759 | == 0) |
1760 | { | |
1761 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE); | |
1762 | goto err; | |
1763 | } | |
1764 | ||
1765 | /* Encode the public key. | |
1766 | * First check the size of encoding and | |
1767 | * allocate memory accordingly. | |
1768 | */ | |
9dd84053 NL |
1769 | encodedlen = EC_POINT_point2oct(group, |
1770 | EC_KEY_get0_public_key(ecdh), | |
ea262260 BM |
1771 | POINT_CONVERSION_UNCOMPRESSED, |
1772 | NULL, 0, NULL); | |
1773 | ||
1774 | encodedPoint = (unsigned char *) | |
1775 | OPENSSL_malloc(encodedlen*sizeof(unsigned char)); | |
1776 | bn_ctx = BN_CTX_new(); | |
1777 | if ((encodedPoint == NULL) || (bn_ctx == NULL)) | |
1778 | { | |
1779 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); | |
1780 | goto err; | |
1781 | } | |
1782 | ||
1783 | ||
9dd84053 NL |
1784 | encodedlen = EC_POINT_point2oct(group, |
1785 | EC_KEY_get0_public_key(ecdh), | |
ea262260 BM |
1786 | POINT_CONVERSION_UNCOMPRESSED, |
1787 | encodedPoint, encodedlen, bn_ctx); | |
1788 | ||
1789 | if (encodedlen == 0) | |
1790 | { | |
1791 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1792 | goto err; | |
1793 | } | |
1794 | ||
1795 | BN_CTX_free(bn_ctx); bn_ctx=NULL; | |
1796 | ||
1797 | /* XXX: For now, we only support named (not | |
1798 | * generic) curves in ECDH ephemeral key exchanges. | |
d56349a2 | 1799 | * In this situation, we need four additional bytes |
ea262260 BM |
1800 | * to encode the entire ServerECDHParams |
1801 | * structure. | |
1802 | */ | |
d56349a2 | 1803 | n = 4 + encodedlen; |
ea262260 BM |
1804 | |
1805 | /* We'll generate the serverKeyExchange message | |
1806 | * explicitly so we can set these to NULLs | |
1807 | */ | |
1808 | r[0]=NULL; | |
1809 | r[1]=NULL; | |
1810 | r[2]=NULL; | |
d56349a2 | 1811 | r[3]=NULL; |
ea262260 BM |
1812 | } |
1813 | else | |
1814 | #endif /* !OPENSSL_NO_ECDH */ | |
ddac1974 NL |
1815 | #ifndef OPENSSL_NO_PSK |
1816 | if (type & SSL_kPSK) | |
1817 | { | |
1818 | /* reserve size for record length and PSK identity hint*/ | |
1819 | n+=2+strlen(s->ctx->psk_identity_hint); | |
1820 | } | |
1821 | else | |
1822 | #endif /* !OPENSSL_NO_PSK */ | |
edc032b5 BL |
1823 | #ifndef OPENSSL_NO_SRP |
1824 | if (type & SSL_kSRP) | |
1825 | { | |
1826 | if ((s->srp_ctx.N == NULL) || | |
1827 | (s->srp_ctx.g == NULL) || | |
1828 | (s->srp_ctx.s == NULL) || | |
1829 | (s->srp_ctx.B == NULL)) | |
1830 | { | |
1831 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_SRP_PARAM); | |
1832 | goto err; | |
1833 | } | |
1834 | r[0]=s->srp_ctx.N; | |
1835 | r[1]=s->srp_ctx.g; | |
1836 | r[2]=s->srp_ctx.s; | |
1837 | r[3]=s->srp_ctx.B; | |
1838 | } | |
1839 | else | |
1840 | #endif | |
d02b48c6 | 1841 | { |
58964a49 | 1842 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1843 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); |
1844 | goto f_err; | |
1845 | } | |
edc032b5 | 1846 | for (i=0; r[i] != NULL && i<4; i++) |
d02b48c6 RE |
1847 | { |
1848 | nr[i]=BN_num_bytes(r[i]); | |
edc032b5 BL |
1849 | #ifndef OPENSSL_NO_SRP |
1850 | if ((i == 2) && (type & SSL_kSRP)) | |
1851 | n+=1+nr[i]; | |
1852 | else | |
1853 | #endif | |
d02b48c6 RE |
1854 | n+=2+nr[i]; |
1855 | } | |
1856 | ||
52b8dad8 BM |
1857 | if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) |
1858 | && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) | |
d02b48c6 | 1859 | { |
6b7be581 | 1860 | if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher,&md)) |
d02b48c6 RE |
1861 | == NULL) |
1862 | { | |
58964a49 | 1863 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1864 | goto f_err; |
1865 | } | |
1866 | kn=EVP_PKEY_size(pkey); | |
1867 | } | |
1868 | else | |
1869 | { | |
1870 | pkey=NULL; | |
1871 | kn=0; | |
1872 | } | |
1873 | ||
54a656ef | 1874 | if (!BUF_MEM_grow_clean(buf,n+4+kn)) |
d02b48c6 RE |
1875 | { |
1876 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF); | |
1877 | goto err; | |
1878 | } | |
1879 | d=(unsigned char *)s->init_buf->data; | |
1880 | p= &(d[4]); | |
1881 | ||
edc032b5 | 1882 | for (i=0; r[i] != NULL && i<4; i++) |
d02b48c6 | 1883 | { |
edc032b5 BL |
1884 | #ifndef OPENSSL_NO_SRP |
1885 | if ((i == 2) && (type & SSL_kSRP)) | |
1886 | { | |
1887 | *p = nr[i]; | |
1888 | p++; | |
1889 | } | |
1890 | else | |
1891 | #endif | |
d02b48c6 RE |
1892 | s2n(nr[i],p); |
1893 | BN_bn2bin(r[i],p); | |
1894 | p+=nr[i]; | |
1895 | } | |
1896 | ||
ea262260 | 1897 | #ifndef OPENSSL_NO_ECDH |
89bbe14c | 1898 | if (type & SSL_kEECDH) |
ea262260 BM |
1899 | { |
1900 | /* XXX: For now, we only support named (not generic) curves. | |
1901 | * In this situation, the serverKeyExchange message has: | |
d56349a2 | 1902 | * [1 byte CurveType], [2 byte CurveName] |
ea262260 BM |
1903 | * [1 byte length of encoded point], followed by |
1904 | * the actual encoded point itself | |
1905 | */ | |
1906 | *p = NAMED_CURVE_TYPE; | |
1907 | p += 1; | |
d56349a2 BM |
1908 | *p = 0; |
1909 | p += 1; | |
ea262260 BM |
1910 | *p = curve_id; |
1911 | p += 1; | |
1912 | *p = encodedlen; | |
1913 | p += 1; | |
1914 | memcpy((unsigned char*)p, | |
1915 | (unsigned char *)encodedPoint, | |
1916 | encodedlen); | |
1917 | OPENSSL_free(encodedPoint); | |
4f7533eb | 1918 | encodedPoint = NULL; |
ea262260 BM |
1919 | p += encodedlen; |
1920 | } | |
1921 | #endif | |
1922 | ||
ddac1974 NL |
1923 | #ifndef OPENSSL_NO_PSK |
1924 | if (type & SSL_kPSK) | |
1925 | { | |
1926 | /* copy PSK identity hint */ | |
1927 | s2n(strlen(s->ctx->psk_identity_hint), p); | |
07ef6129 | 1928 | strncpy((char *)p, s->ctx->psk_identity_hint, strlen(s->ctx->psk_identity_hint)); |
ddac1974 NL |
1929 | p+=strlen(s->ctx->psk_identity_hint); |
1930 | } | |
1931 | #endif | |
1932 | ||
d02b48c6 RE |
1933 | /* not anonymous */ |
1934 | if (pkey != NULL) | |
1935 | { | |
1936 | /* n is the length of the params, they start at &(d[4]) | |
1937 | * and p points to the space at the end. */ | |
bc36ee62 | 1938 | #ifndef OPENSSL_NO_RSA |
6b7be581 | 1939 | if (pkey->type == EVP_PKEY_RSA |
238b6361 | 1940 | && TLS1_get_version(s) < TLS1_2_VERSION) |
d02b48c6 RE |
1941 | { |
1942 | q=md_buf; | |
1943 | j=0; | |
1944 | for (num=2; num > 0; num--) | |
1945 | { | |
086e32a6 DSH |
1946 | EVP_MD_CTX_set_flags(&md_ctx, |
1947 | EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); | |
70051b1d DSH |
1948 | EVP_DigestInit_ex(&md_ctx,(num == 2) |
1949 | ?s->ctx->md5:s->ctx->sha1, NULL); | |
43982224 DSH |
1950 | EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); |
1951 | EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
1952 | EVP_DigestUpdate(&md_ctx,&(d[4]),n); | |
1953 | EVP_DigestFinal_ex(&md_ctx,q, | |
1954 | (unsigned int *)&i); | |
d02b48c6 RE |
1955 | q+=i; |
1956 | j+=i; | |
1957 | } | |
1c80019a | 1958 | if (RSA_sign(NID_md5_sha1, md_buf, j, |
ca7fea96 | 1959 | &(p[2]), &u, pkey->pkey.rsa) <= 0) |
d02b48c6 RE |
1960 | { |
1961 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA); | |
1962 | goto err; | |
1963 | } | |
ca7fea96 BL |
1964 | s2n(u,p); |
1965 | n+=u+2; | |
d02b48c6 RE |
1966 | } |
1967 | else | |
1968 | #endif | |
6b7be581 | 1969 | if (md) |
d02b48c6 | 1970 | { |
6b7be581 DSH |
1971 | /* For TLS1.2 and later send signature |
1972 | * algorithm */ | |
238b6361 | 1973 | if (TLS1_get_version(s) >= TLS1_2_VERSION) |
d02b48c6 | 1974 | { |
6b7be581 DSH |
1975 | if (!tls12_get_sigandhash(p, pkey, md)) |
1976 | { | |
1977 | /* Should never happen */ | |
1978 | al=SSL_AD_INTERNAL_ERROR; | |
1979 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); | |
1980 | goto f_err; | |
1981 | } | |
1982 | p+=2; | |
d02b48c6 | 1983 | } |
a2f9200f DSH |
1984 | #ifdef SSL_DEBUG |
1985 | fprintf(stderr, "Using hash %s\n", | |
1986 | EVP_MD_name(md)); | |
1987 | #endif | |
6b7be581 | 1988 | EVP_SignInit_ex(&md_ctx, md, NULL); |
43982224 DSH |
1989 | EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); |
1990 | EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
1991 | EVP_SignUpdate(&md_ctx,&(d[4]),n); | |
1992 | if (!EVP_SignFinal(&md_ctx,&(p[2]), | |
1993 | (unsigned int *)&i,pkey)) | |
ea262260 | 1994 | { |
6b7be581 | 1995 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_EVP); |
ea262260 BM |
1996 | goto err; |
1997 | } | |
1998 | s2n(i,p); | |
1999 | n+=i+2; | |
238b6361 | 2000 | if (TLS1_get_version(s) >= TLS1_2_VERSION) |
6b7be581 | 2001 | n+= 2; |
ea262260 BM |
2002 | } |
2003 | else | |
d02b48c6 RE |
2004 | { |
2005 | /* Is this error check actually needed? */ | |
58964a49 | 2006 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
2007 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE); |
2008 | goto f_err; | |
2009 | } | |
2010 | } | |
2011 | ||
2012 | *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE; | |
2013 | l2n3(n,d); | |
2014 | ||
2015 | /* we should now have things packed up, so lets send | |
2016 | * it off */ | |
2017 | s->init_num=n+4; | |
2018 | s->init_off=0; | |
2019 | } | |
2020 | ||
a87030a1 | 2021 | s->state = SSL3_ST_SW_KEY_EXCH_B; |
dbad1690 | 2022 | EVP_MD_CTX_cleanup(&md_ctx); |
d02b48c6 RE |
2023 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); |
2024 | f_err: | |
2025 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
2026 | err: | |
ea262260 BM |
2027 | #ifndef OPENSSL_NO_ECDH |
2028 | if (encodedPoint != NULL) OPENSSL_free(encodedPoint); | |
2029 | BN_CTX_free(bn_ctx); | |
2030 | #endif | |
dbad1690 | 2031 | EVP_MD_CTX_cleanup(&md_ctx); |
d02b48c6 RE |
2032 | return(-1); |
2033 | } | |
2034 | ||
36d16f8e | 2035 | int ssl3_send_certificate_request(SSL *s) |
d02b48c6 RE |
2036 | { |
2037 | unsigned char *p,*d; | |
2038 | int i,j,nl,off,n; | |
f73e07cf | 2039 | STACK_OF(X509_NAME) *sk=NULL; |
d02b48c6 RE |
2040 | X509_NAME *name; |
2041 | BUF_MEM *buf; | |
2042 | ||
2043 | if (s->state == SSL3_ST_SW_CERT_REQ_A) | |
2044 | { | |
2045 | buf=s->init_buf; | |
2046 | ||
2047 | d=p=(unsigned char *)&(buf->data[4]); | |
2048 | ||
2049 | /* get the list of acceptable cert types */ | |
2050 | p++; | |
2051 | n=ssl3_get_req_cert_type(s,p); | |
2052 | d[0]=n; | |
2053 | p+=n; | |
2054 | n++; | |
2055 | ||
238b6361 | 2056 | if (TLS1_get_version(s) >= TLS1_2_VERSION) |
f37f20ff DSH |
2057 | { |
2058 | nl = tls12_get_req_sig_algs(s, p + 2); | |
2059 | s2n(nl, p); | |
2060 | p += nl + 2; | |
2061 | n += nl + 2; | |
2062 | } | |
2063 | ||
d02b48c6 RE |
2064 | off=n; |
2065 | p+=2; | |
2066 | n+=2; | |
2067 | ||
2068 | sk=SSL_get_client_CA_list(s); | |
2069 | nl=0; | |
2070 | if (sk != NULL) | |
2071 | { | |
f73e07cf | 2072 | for (i=0; i<sk_X509_NAME_num(sk); i++) |
d02b48c6 | 2073 | { |
f73e07cf | 2074 | name=sk_X509_NAME_value(sk,i); |
d02b48c6 | 2075 | j=i2d_X509_NAME(name,NULL); |
54a656ef | 2076 | if (!BUF_MEM_grow_clean(buf,4+n+j+2)) |
d02b48c6 RE |
2077 | { |
2078 | SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB); | |
2079 | goto err; | |
2080 | } | |
2081 | p=(unsigned char *)&(buf->data[4+n]); | |
58964a49 | 2082 | if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) |
d02b48c6 RE |
2083 | { |
2084 | s2n(j,p); | |
2085 | i2d_X509_NAME(name,&p); | |
2086 | n+=2+j; | |
2087 | nl+=2+j; | |
2088 | } | |
2089 | else | |
2090 | { | |
2091 | d=p; | |
2092 | i2d_X509_NAME(name,&p); | |
2093 | j-=2; s2n(j,d); j+=2; | |
2094 | n+=j; | |
2095 | nl+=j; | |
2096 | } | |
2097 | } | |
2098 | } | |
2099 | /* else no CA names */ | |
2100 | p=(unsigned char *)&(buf->data[4+off]); | |
2101 | s2n(nl,p); | |
2102 | ||
2103 | d=(unsigned char *)buf->data; | |
2104 | *(d++)=SSL3_MT_CERTIFICATE_REQUEST; | |
2105 | l2n3(n,d); | |
2106 | ||
2107 | /* we should now have things packed up, so lets send | |
2108 | * it off */ | |
2109 | ||
2110 | s->init_num=n+4; | |
2111 | s->init_off=0; | |
de469ef2 DSH |
2112 | #ifdef NETSCAPE_HANG_BUG |
2113 | p=(unsigned char *)s->init_buf->data + s->init_num; | |
2114 | ||
2115 | /* do the header */ | |
2116 | *(p++)=SSL3_MT_SERVER_DONE; | |
2117 | *(p++)=0; | |
2118 | *(p++)=0; | |
2119 | *(p++)=0; | |
2120 | s->init_num += 4; | |
2121 | #endif | |
2122 | ||
e59659dc | 2123 | s->state = SSL3_ST_SW_CERT_REQ_B; |
d02b48c6 RE |
2124 | } |
2125 | ||
2126 | /* SSL3_ST_SW_CERT_REQ_B */ | |
2127 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
2128 | err: | |
2129 | return(-1); | |
2130 | } | |
2131 | ||
36d16f8e | 2132 | int ssl3_get_client_key_exchange(SSL *s) |
d02b48c6 RE |
2133 | { |
2134 | int i,al,ok; | |
2135 | long n; | |
52b8dad8 | 2136 | unsigned long alg_k; |
d02b48c6 | 2137 | unsigned char *p; |
bc36ee62 | 2138 | #ifndef OPENSSL_NO_RSA |
d02b48c6 | 2139 | RSA *rsa=NULL; |
d02b48c6 | 2140 | EVP_PKEY *pkey=NULL; |
79df9d62 | 2141 | #endif |
bc36ee62 | 2142 | #ifndef OPENSSL_NO_DH |
58964a49 | 2143 | BIGNUM *pub=NULL; |
0d609395 | 2144 | DH *dh_srvr, *dh_clnt = NULL; |
58964a49 | 2145 | #endif |
bc36ee62 | 2146 | #ifndef OPENSSL_NO_KRB5 |
52b8dad8 | 2147 | KSSL_ERR kssl_err; |
bc36ee62 | 2148 | #endif /* OPENSSL_NO_KRB5 */ |
d02b48c6 | 2149 | |
ea262260 BM |
2150 | #ifndef OPENSSL_NO_ECDH |
2151 | EC_KEY *srvr_ecdh = NULL; | |
2152 | EVP_PKEY *clnt_pub_pkey = NULL; | |
2153 | EC_POINT *clnt_ecpoint = NULL; | |
2154 | BN_CTX *bn_ctx = NULL; | |
2155 | #endif | |
2156 | ||
36d16f8e | 2157 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
2158 | SSL3_ST_SR_KEY_EXCH_A, |
2159 | SSL3_ST_SR_KEY_EXCH_B, | |
2160 | SSL3_MT_CLIENT_KEY_EXCHANGE, | |
73969585 | 2161 | 2048, /* ??? */ |
d02b48c6 RE |
2162 | &ok); |
2163 | ||
2164 | if (!ok) return((int)n); | |
48948d53 | 2165 | p=(unsigned char *)s->init_msg; |
d02b48c6 | 2166 | |
52b8dad8 | 2167 | alg_k=s->s3->tmp.new_cipher->algorithm_mkey; |
d02b48c6 | 2168 | |
bc36ee62 | 2169 | #ifndef OPENSSL_NO_RSA |
52b8dad8 | 2170 | if (alg_k & SSL_kRSA) |
d02b48c6 RE |
2171 | { |
2172 | /* FIX THIS UP EAY EAY EAY EAY */ | |
2173 | if (s->s3->tmp.use_rsa_tmp) | |
2174 | { | |
b56bce4f | 2175 | if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL)) |
ca8e5b9b | 2176 | rsa=s->cert->rsa_tmp; |
d02b48c6 RE |
2177 | /* Don't do a callback because rsa_tmp should |
2178 | * be sent already */ | |
2179 | if (rsa == NULL) | |
2180 | { | |
58964a49 | 2181 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
2182 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY); |
2183 | goto f_err; | |
2184 | ||
2185 | } | |
2186 | } | |
2187 | else | |
2188 | { | |
2189 | pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey; | |
2190 | if ( (pkey == NULL) || | |
2191 | (pkey->type != EVP_PKEY_RSA) || | |
2192 | (pkey->pkey.rsa == NULL)) | |
2193 | { | |
58964a49 | 2194 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
2195 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE); |
2196 | goto f_err; | |
2197 | } | |
2198 | rsa=pkey->pkey.rsa; | |
2199 | } | |
2200 | ||
7432d073 | 2201 | /* TLS and [incidentally] DTLS{0xFEFF} */ |
8711efb4 | 2202 | if (s->version > SSL3_VERSION && s->version != DTLS1_BAD_VER) |
58964a49 RE |
2203 | { |
2204 | n2s(p,i); | |
2205 | if (n != i+2) | |
2206 | { | |
2207 | if (!(s->options & SSL_OP_TLS_D5_BUG)) | |
2208 | { | |
2209 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG); | |
2210 | goto err; | |
2211 | } | |
2212 | else | |
2213 | p-=2; | |
2214 | } | |
2215 | else | |
2216 | n=i; | |
2217 | } | |
2218 | ||
d02b48c6 | 2219 | i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING); |
58964a49 | 2220 | |
31bc51c8 BM |
2221 | al = -1; |
2222 | ||
d02b48c6 RE |
2223 | if (i != SSL_MAX_MASTER_KEY_LENGTH) |
2224 | { | |
2225 | al=SSL_AD_DECODE_ERROR; | |
02da5bcd | 2226 | /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); */ |
d02b48c6 RE |
2227 | } |
2228 | ||
31bc51c8 | 2229 | if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff)))) |
d02b48c6 | 2230 | { |
2c05c494 BM |
2231 | /* The premaster secret must contain the same version number as the |
2232 | * ClientHello to detect version rollback attacks (strangely, the | |
2233 | * protocol does not offer such protection for DH ciphersuites). | |
2234 | * However, buggy clients exist that send the negotiated protocol | |
93d8bfcd | 2235 | * version instead if the server does not support the requested |
2c05c494 BM |
2236 | * protocol version. |
2237 | * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */ | |
2238 | if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) && | |
2239 | (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff)))) | |
2240 | { | |
2241 | al=SSL_AD_DECODE_ERROR; | |
02da5bcd BM |
2242 | /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER); */ |
2243 | ||
2244 | /* The Klima-Pokorny-Rosa extension of Bleichenbacher's attack | |
2245 | * (http://eprint.iacr.org/2003/052/) exploits the version | |
2246 | * number check as a "bad version oracle" -- an alert would | |
2247 | * reveal that the plaintext corresponding to some ciphertext | |
2248 | * made up by the adversary is properly formatted except | |
2249 | * that the version number is wrong. To avoid such attacks, | |
2250 | * we should treat this just like any other decryption error. */ | |
2c05c494 | 2251 | } |
d02b48c6 | 2252 | } |
d02b48c6 | 2253 | |
31bc51c8 BM |
2254 | if (al != -1) |
2255 | { | |
31bc51c8 BM |
2256 | /* Some decryption failure -- use random value instead as countermeasure |
2257 | * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding | |
02da5bcd | 2258 | * (see RFC 2246, section 7.4.7.1). */ |
31bc51c8 BM |
2259 | ERR_clear_error(); |
2260 | i = SSL_MAX_MASTER_KEY_LENGTH; | |
2261 | p[0] = s->client_version >> 8; | |
2262 | p[1] = s->client_version & 0xff; | |
7c7667b8 NL |
2263 | if (RAND_pseudo_bytes(p+2, i-2) <= 0) /* should be RAND_bytes, but we cannot work around a failure */ |
2264 | goto err; | |
31bc51c8 BM |
2265 | } |
2266 | ||
d02b48c6 | 2267 | s->session->master_key_length= |
58964a49 | 2268 | s->method->ssl3_enc->generate_master_secret(s, |
d02b48c6 RE |
2269 | s->session->master_key, |
2270 | p,i); | |
43d60164 | 2271 | OPENSSL_cleanse(p,i); |
d02b48c6 RE |
2272 | } |
2273 | else | |
4c5fac4a | 2274 | #endif |
bc36ee62 | 2275 | #ifndef OPENSSL_NO_DH |
52b8dad8 | 2276 | if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) |
d02b48c6 | 2277 | { |
0d609395 DSH |
2278 | int idx = -1; |
2279 | EVP_PKEY *skey = NULL; | |
2280 | if (n) | |
2281 | n2s(p,i); | |
de2b5b74 DSH |
2282 | else |
2283 | i = 0; | |
0d609395 | 2284 | if (n && n != i+2) |
d02b48c6 | 2285 | { |
58964a49 | 2286 | if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG)) |
d02b48c6 RE |
2287 | { |
2288 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG); | |
2289 | goto err; | |
2290 | } | |
2291 | else | |
2292 | { | |
2293 | p-=2; | |
2294 | i=(int)n; | |
2295 | } | |
2296 | } | |
0d609395 DSH |
2297 | if (alg_k & SSL_kDHr) |
2298 | idx = SSL_PKEY_DH_RSA; | |
2299 | else if (alg_k & SSL_kDHd) | |
2300 | idx = SSL_PKEY_DH_DSA; | |
2301 | if (idx >= 0) | |
2302 | { | |
2303 | skey = s->cert->pkeys[idx].privatekey; | |
2304 | if ((skey == NULL) || | |
2305 | (skey->type != EVP_PKEY_DH) || | |
2306 | (skey->pkey.dh == NULL)) | |
2307 | { | |
2308 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2309 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE); | |
2310 | goto f_err; | |
2311 | } | |
2312 | dh_srvr = skey->pkey.dh; | |
2313 | } | |
2314 | else if (s->s3->tmp.dh == NULL) | |
d02b48c6 | 2315 | { |
58964a49 | 2316 | al=SSL_AD_HANDSHAKE_FAILURE; |
0d609395 | 2317 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
d02b48c6 RE |
2318 | goto f_err; |
2319 | } | |
2320 | else | |
0d609395 DSH |
2321 | dh_srvr=s->s3->tmp.dh; |
2322 | ||
2323 | if (n == 0L) | |
d02b48c6 | 2324 | { |
0d609395 DSH |
2325 | /* Get pubkey from cert */ |
2326 | EVP_PKEY *clkey=X509_get_pubkey(s->session->peer); | |
2327 | if (clkey) | |
2328 | { | |
2329 | if (EVP_PKEY_cmp_parameters(clkey, skey) == 1) | |
2330 | dh_clnt = EVP_PKEY_get1_DH(clkey); | |
8e1dc4d7 | 2331 | } |
0d609395 | 2332 | if (dh_clnt == NULL) |
d02b48c6 | 2333 | { |
58964a49 | 2334 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
2335 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
2336 | goto f_err; | |
2337 | } | |
0d609395 DSH |
2338 | EVP_PKEY_free(clkey); |
2339 | pub = dh_clnt->pub_key; | |
d02b48c6 | 2340 | } |
0d609395 DSH |
2341 | else |
2342 | pub=BN_bin2bn(p,i,NULL); | |
d02b48c6 RE |
2343 | if (pub == NULL) |
2344 | { | |
2345 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB); | |
2346 | goto err; | |
2347 | } | |
58964a49 | 2348 | |
d02b48c6 RE |
2349 | i=DH_compute_key(p,pub,dh_srvr); |
2350 | ||
2351 | if (i <= 0) | |
2352 | { | |
2353 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); | |
25536ea6 | 2354 | BN_clear_free(pub); |
d02b48c6 RE |
2355 | goto err; |
2356 | } | |
2357 | ||
2358 | DH_free(s->s3->tmp.dh); | |
2359 | s->s3->tmp.dh=NULL; | |
0d609395 DSH |
2360 | if (dh_clnt) |
2361 | DH_free(dh_clnt); | |
2362 | else | |
2363 | BN_clear_free(pub); | |
d02b48c6 RE |
2364 | pub=NULL; |
2365 | s->session->master_key_length= | |
58964a49 | 2366 | s->method->ssl3_enc->generate_master_secret(s, |
d02b48c6 | 2367 | s->session->master_key,p,i); |
43d60164 | 2368 | OPENSSL_cleanse(p,i); |
0d609395 DSH |
2369 | if (dh_clnt) |
2370 | return 2; | |
d02b48c6 RE |
2371 | } |
2372 | else | |
2373 | #endif | |
bc36ee62 | 2374 | #ifndef OPENSSL_NO_KRB5 |
52b8dad8 BM |
2375 | if (alg_k & SSL_kKRB5) |
2376 | { | |
2377 | krb5_error_code krb5rc; | |
2a1ef754 RL |
2378 | krb5_data enc_ticket; |
2379 | krb5_data authenticator; | |
2380 | krb5_data enc_pms; | |
52b8dad8 | 2381 | KSSL_CTX *kssl_ctx = s->kssl_ctx; |
2a1ef754 | 2382 | EVP_CIPHER_CTX ciph_ctx; |
ef236ec3 | 2383 | const EVP_CIPHER *enc = NULL; |
2a1ef754 | 2384 | unsigned char iv[EVP_MAX_IV_LENGTH]; |
acdf4afb | 2385 | unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH |
52b8dad8 BM |
2386 | + EVP_MAX_BLOCK_LENGTH]; |
2387 | int padl, outl; | |
2a1ef754 RL |
2388 | krb5_timestamp authtime = 0; |
2389 | krb5_ticket_times ttimes; | |
f9b3bff6 | 2390 | |
de941e28 DSH |
2391 | EVP_CIPHER_CTX_init(&ciph_ctx); |
2392 | ||
52b8dad8 | 2393 | if (!kssl_ctx) kssl_ctx = kssl_ctx_new(); |
2a1ef754 RL |
2394 | |
2395 | n2s(p,i); | |
2396 | enc_ticket.length = i; | |
9e5790ce | 2397 | |
ef236ec3 | 2398 | if (n < (long)(enc_ticket.length + 6)) |
9e5790ce NL |
2399 | { |
2400 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2401 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2402 | goto err; | |
2403 | } | |
2404 | ||
0b4c91c0 | 2405 | enc_ticket.data = (char *)p; |
2a1ef754 RL |
2406 | p+=enc_ticket.length; |
2407 | ||
2408 | n2s(p,i); | |
2409 | authenticator.length = i; | |
9e5790ce | 2410 | |
ef236ec3 | 2411 | if (n < (long)(enc_ticket.length + authenticator.length + 6)) |
9e5790ce NL |
2412 | { |
2413 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2414 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2415 | goto err; | |
2416 | } | |
2417 | ||
0b4c91c0 | 2418 | authenticator.data = (char *)p; |
2a1ef754 RL |
2419 | p+=authenticator.length; |
2420 | ||
2421 | n2s(p,i); | |
2422 | enc_pms.length = i; | |
0b4c91c0 | 2423 | enc_pms.data = (char *)p; |
2a1ef754 RL |
2424 | p+=enc_pms.length; |
2425 | ||
c046fffa LJ |
2426 | /* Note that the length is checked again below, |
2427 | ** after decryption | |
2428 | */ | |
dd7ab82e | 2429 | if(enc_pms.length > sizeof pms) |
c046fffa LJ |
2430 | { |
2431 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2432 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2433 | goto err; | |
2434 | } | |
2435 | ||
0858b71b DSH |
2436 | if (n != (long)(enc_ticket.length + authenticator.length + |
2437 | enc_pms.length + 6)) | |
2a1ef754 RL |
2438 | { |
2439 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2440 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2441 | goto err; | |
2442 | } | |
2443 | ||
52b8dad8 | 2444 | if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes, |
2a1ef754 | 2445 | &kssl_err)) != 0) |
52b8dad8 | 2446 | { |
f9b3bff6 | 2447 | #ifdef KSSL_DEBUG |
52b8dad8 BM |
2448 | printf("kssl_sget_tkt rtn %d [%d]\n", |
2449 | krb5rc, kssl_err.reason); | |
2450 | if (kssl_err.text) | |
2451 | printf("kssl_err text= %s\n", kssl_err.text); | |
f9b3bff6 | 2452 | #endif /* KSSL_DEBUG */ |
52b8dad8 BM |
2453 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2454 | kssl_err.reason); | |
2455 | goto err; | |
2456 | } | |
f9b3bff6 | 2457 | |
2a1ef754 RL |
2458 | /* Note: no authenticator is not considered an error, |
2459 | ** but will return authtime == 0. | |
2460 | */ | |
2461 | if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator, | |
2462 | &authtime, &kssl_err)) != 0) | |
2463 | { | |
2464 | #ifdef KSSL_DEBUG | |
52b8dad8 BM |
2465 | printf("kssl_check_authent rtn %d [%d]\n", |
2466 | krb5rc, kssl_err.reason); | |
2467 | if (kssl_err.text) | |
2468 | printf("kssl_err text= %s\n", kssl_err.text); | |
2a1ef754 | 2469 | #endif /* KSSL_DEBUG */ |
52b8dad8 BM |
2470 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2471 | kssl_err.reason); | |
2472 | goto err; | |
2a1ef754 RL |
2473 | } |
2474 | ||
2475 | if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0) | |
2476 | { | |
aa4ce731 | 2477 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, krb5rc); |
52b8dad8 | 2478 | goto err; |
2a1ef754 RL |
2479 | } |
2480 | ||
f9b3bff6 | 2481 | #ifdef KSSL_DEBUG |
52b8dad8 | 2482 | kssl_ctx_show(kssl_ctx); |
f9b3bff6 RL |
2483 | #endif /* KSSL_DEBUG */ |
2484 | ||
2a1ef754 | 2485 | enc = kssl_map_enc(kssl_ctx->enctype); |
52b8dad8 BM |
2486 | if (enc == NULL) |
2487 | goto err; | |
882e8912 | 2488 | |
54a656ef | 2489 | memset(iv, 0, sizeof iv); /* per RFC 1510 */ |
2a1ef754 | 2490 | |
db6a87d8 | 2491 | if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv)) |
acdf4afb RL |
2492 | { |
2493 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2494 | SSL_R_DECRYPTION_FAILED); | |
2495 | goto err; | |
2496 | } | |
2497 | if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl, | |
0b4c91c0 | 2498 | (unsigned char *)enc_pms.data, enc_pms.length)) |
acdf4afb RL |
2499 | { |
2500 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2501 | SSL_R_DECRYPTION_FAILED); | |
2502 | goto err; | |
2503 | } | |
2a1ef754 RL |
2504 | if (outl > SSL_MAX_MASTER_KEY_LENGTH) |
2505 | { | |
2506 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2507 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2508 | goto err; | |
2509 | } | |
581f1c84 | 2510 | if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl)) |
acdf4afb RL |
2511 | { |
2512 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2513 | SSL_R_DECRYPTION_FAILED); | |
2514 | goto err; | |
2515 | } | |
2a1ef754 RL |
2516 | outl += padl; |
2517 | if (outl > SSL_MAX_MASTER_KEY_LENGTH) | |
2518 | { | |
2519 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2520 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2521 | goto err; | |
2522 | } | |
c1ca9d32 | 2523 | if (!((pms[0] == (s->client_version>>8)) && (pms[1] == (s->client_version & 0xff)))) |
cbb92dfa RL |
2524 | { |
2525 | /* The premaster secret must contain the same version number as the | |
2526 | * ClientHello to detect version rollback attacks (strangely, the | |
2527 | * protocol does not offer such protection for DH ciphersuites). | |
2528 | * However, buggy clients exist that send random bytes instead of | |
2529 | * the protocol version. | |
2530 | * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. | |
2531 | * (Perhaps we should have a separate BUG value for the Kerberos cipher) | |
2532 | */ | |
c1ca9d32 | 2533 | if (!(s->options & SSL_OP_TLS_ROLLBACK_BUG)) |
52b8dad8 | 2534 | { |
cbb92dfa RL |
2535 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2536 | SSL_AD_DECODE_ERROR); | |
2537 | goto err; | |
2538 | } | |
2539 | } | |
2540 | ||
2a1ef754 RL |
2541 | EVP_CIPHER_CTX_cleanup(&ciph_ctx); |
2542 | ||
52b8dad8 BM |
2543 | s->session->master_key_length= |
2544 | s->method->ssl3_enc->generate_master_secret(s, | |
2545 | s->session->master_key, pms, outl); | |
2a1ef754 | 2546 | |
52b8dad8 BM |
2547 | if (kssl_ctx->client_princ) |
2548 | { | |
2549 | size_t len = strlen(kssl_ctx->client_princ); | |
2550 | if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH ) | |
2551 | { | |
2552 | s->session->krb5_client_princ_len = len; | |
2553 | memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len); | |
2554 | } | |
2555 | } | |
882e8912 RL |
2556 | |
2557 | ||
52b8dad8 | 2558 | /* Was doing kssl_ctx_free() here, |
2a1ef754 | 2559 | ** but it caused problems for apache. |
52b8dad8 BM |
2560 | ** kssl_ctx = kssl_ctx_free(kssl_ctx); |
2561 | ** if (s->kssl_ctx) s->kssl_ctx = NULL; | |
2562 | */ | |
2563 | } | |
f9b3bff6 | 2564 | else |
bc36ee62 | 2565 | #endif /* OPENSSL_NO_KRB5 */ |
ea262260 BM |
2566 | |
2567 | #ifndef OPENSSL_NO_ECDH | |
52b8dad8 | 2568 | if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) |
ea262260 BM |
2569 | { |
2570 | int ret = 1; | |
968766ca | 2571 | int field_size = 0; |
9dd84053 NL |
2572 | const EC_KEY *tkey; |
2573 | const EC_GROUP *group; | |
2574 | const BIGNUM *priv_key; | |
ea262260 | 2575 | |
52b8dad8 | 2576 | /* initialize structures for server's ECDH key pair */ |
ea262260 BM |
2577 | if ((srvr_ecdh = EC_KEY_new()) == NULL) |
2578 | { | |
52b8dad8 | 2579 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
ea262260 | 2580 | ERR_R_MALLOC_FAILURE); |
52b8dad8 | 2581 | goto err; |
ea262260 BM |
2582 | } |
2583 | ||
2584 | /* Let's get server private key and group information */ | |
52b8dad8 | 2585 | if (alg_k & (SSL_kECDHr|SSL_kECDHe)) |
ea262260 | 2586 | { |
52b8dad8 | 2587 | /* use the certificate */ |
feaaf1db | 2588 | tkey = s->cert->pkeys[SSL_PKEY_ECC].privatekey->pkey.ec; |
ea262260 BM |
2589 | } |
2590 | else | |
2591 | { | |
2592 | /* use the ephermeral values we saved when | |
2593 | * generating the ServerKeyExchange msg. | |
2594 | */ | |
9dd84053 NL |
2595 | tkey = s->s3->tmp.ecdh; |
2596 | } | |
2597 | ||
2598 | group = EC_KEY_get0_group(tkey); | |
2599 | priv_key = EC_KEY_get0_private_key(tkey); | |
2600 | ||
2601 | if (!EC_KEY_set_group(srvr_ecdh, group) || | |
2602 | !EC_KEY_set_private_key(srvr_ecdh, priv_key)) | |
2603 | { | |
2604 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2605 | ERR_R_EC_LIB); | |
2606 | goto err; | |
ea262260 BM |
2607 | } |
2608 | ||
2609 | /* Let's get client's public key */ | |
9dd84053 | 2610 | if ((clnt_ecpoint = EC_POINT_new(group)) == NULL) |
ea262260 BM |
2611 | { |
2612 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2613 | ERR_R_MALLOC_FAILURE); | |
2614 | goto err; | |
2615 | } | |
2616 | ||
52b8dad8 BM |
2617 | if (n == 0L) |
2618 | { | |
ea262260 BM |
2619 | /* Client Publickey was in Client Certificate */ |
2620 | ||
52b8dad8 | 2621 | if (alg_k & SSL_kEECDH) |
ea262260 BM |
2622 | { |
2623 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2624 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); | |
2625 | goto f_err; | |
2626 | } | |
52b8dad8 | 2627 | if (((clnt_pub_pkey=X509_get_pubkey(s->session->peer)) |
ea262260 | 2628 | == NULL) || |
5488bb61 | 2629 | (clnt_pub_pkey->type != EVP_PKEY_EC)) |
52b8dad8 | 2630 | { |
ea262260 BM |
2631 | /* XXX: For now, we do not support client |
2632 | * authentication using ECDH certificates | |
2633 | * so this branch (n == 0L) of the code is | |
2634 | * never executed. When that support is | |
2635 | * added, we ought to ensure the key | |
2636 | * received in the certificate is | |
2637 | * authorized for key agreement. | |
2638 | * ECDH_compute_key implicitly checks that | |
2639 | * the two ECDH shares are for the same | |
2640 | * group. | |
2641 | */ | |
52b8dad8 BM |
2642 | al=SSL_AD_HANDSHAKE_FAILURE; |
2643 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
ea262260 | 2644 | SSL_R_UNABLE_TO_DECODE_ECDH_CERTS); |
52b8dad8 BM |
2645 | goto f_err; |
2646 | } | |
ea262260 | 2647 | |
8c5a2bd6 NL |
2648 | if (EC_POINT_copy(clnt_ecpoint, |
2649 | EC_KEY_get0_public_key(clnt_pub_pkey->pkey.ec)) == 0) | |
2650 | { | |
2651 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2652 | ERR_R_EC_LIB); | |
2653 | goto err; | |
2654 | } | |
52b8dad8 BM |
2655 | ret = 2; /* Skip certificate verify processing */ |
2656 | } | |
2657 | else | |
2658 | { | |
ea262260 BM |
2659 | /* Get client's public key from encoded point |
2660 | * in the ClientKeyExchange message. | |
2661 | */ | |
2662 | if ((bn_ctx = BN_CTX_new()) == NULL) | |
2663 | { | |
2664 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2665 | ERR_R_MALLOC_FAILURE); | |
2666 | goto err; | |
2667 | } | |
2668 | ||
52b8dad8 BM |
2669 | /* Get encoded point length */ |
2670 | i = *p; | |
ea262260 | 2671 | p += 1; |
e7928282 BM |
2672 | if (n != 1 + i) |
2673 | { | |
2674 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2675 | ERR_R_EC_LIB); | |
2676 | goto err; | |
2677 | } | |
52b8dad8 | 2678 | if (EC_POINT_oct2point(group, |
ea262260 BM |
2679 | clnt_ecpoint, p, i, bn_ctx) == 0) |
2680 | { | |
2681 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2682 | ERR_R_EC_LIB); | |
2683 | goto err; | |
2684 | } | |
52b8dad8 BM |
2685 | /* p is pointing to somewhere in the buffer |
2686 | * currently, so set it to the start | |
2687 | */ | |
2688 | p=(unsigned char *)s->init_buf->data; | |
2689 | } | |
ea262260 BM |
2690 | |
2691 | /* Compute the shared pre-master secret */ | |
9dd84053 | 2692 | field_size = EC_GROUP_get_degree(group); |
968766ca BM |
2693 | if (field_size <= 0) |
2694 | { | |
2695 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2696 | ERR_R_ECDH_LIB); | |
2697 | goto err; | |
2698 | } | |
d56349a2 | 2699 | i = ECDH_compute_key(p, (field_size+7)/8, clnt_ecpoint, srvr_ecdh, NULL); |
52b8dad8 BM |
2700 | if (i <= 0) |
2701 | { | |
2702 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
ea262260 | 2703 | ERR_R_ECDH_LIB); |
52b8dad8 BM |
2704 | goto err; |
2705 | } | |
ea262260 BM |
2706 | |
2707 | EVP_PKEY_free(clnt_pub_pkey); | |
2708 | EC_POINT_free(clnt_ecpoint); | |
4a94003a | 2709 | EC_KEY_free(srvr_ecdh); |
ea262260 | 2710 | BN_CTX_free(bn_ctx); |
21b25ed4 DSH |
2711 | EC_KEY_free(s->s3->tmp.ecdh); |
2712 | s->s3->tmp.ecdh = NULL; | |
ea262260 BM |
2713 | |
2714 | /* Compute the master secret */ | |
52b8dad8 | 2715 | s->session->master_key_length = s->method->ssl3_enc-> \ |
ea262260 BM |
2716 | generate_master_secret(s, s->session->master_key, p, i); |
2717 | ||
52b8dad8 BM |
2718 | OPENSSL_cleanse(p, i); |
2719 | return (ret); | |
ea262260 BM |
2720 | } |
2721 | else | |
ddac1974 NL |
2722 | #endif |
2723 | #ifndef OPENSSL_NO_PSK | |
52b8dad8 | 2724 | if (alg_k & SSL_kPSK) |
ddac1974 NL |
2725 | { |
2726 | unsigned char *t = NULL; | |
2727 | unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; | |
2728 | unsigned int pre_ms_len = 0, psk_len = 0; | |
2729 | int psk_err = 1; | |
2730 | char tmp_id[PSK_MAX_IDENTITY_LEN+1]; | |
2731 | ||
2732 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2733 | ||
2734 | n2s(p,i); | |
2735 | if (n != i+2) | |
2736 | { | |
2737 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2738 | SSL_R_LENGTH_MISMATCH); | |
2739 | goto psk_err; | |
2740 | } | |
2741 | if (i > PSK_MAX_IDENTITY_LEN) | |
2742 | { | |
2743 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2744 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2745 | goto psk_err; | |
2746 | } | |
2747 | if (s->psk_server_callback == NULL) | |
2748 | { | |
2749 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2750 | SSL_R_PSK_NO_SERVER_CB); | |
2751 | goto psk_err; | |
2752 | } | |
2753 | ||
2754 | /* Create guaranteed NULL-terminated identity | |
2755 | * string for the callback */ | |
2756 | memcpy(tmp_id, p, i); | |
2757 | memset(tmp_id+i, 0, PSK_MAX_IDENTITY_LEN+1-i); | |
2758 | psk_len = s->psk_server_callback(s, tmp_id, | |
2759 | psk_or_pre_ms, sizeof(psk_or_pre_ms)); | |
2760 | OPENSSL_cleanse(tmp_id, PSK_MAX_IDENTITY_LEN+1); | |
2761 | ||
2762 | if (psk_len > PSK_MAX_PSK_LEN) | |
2763 | { | |
2764 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2765 | ERR_R_INTERNAL_ERROR); | |
2766 | goto psk_err; | |
2767 | } | |
2768 | else if (psk_len == 0) | |
2769 | { | |
2770 | /* PSK related to the given identity not found */ | |
2771 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2772 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
2773 | al=SSL_AD_UNKNOWN_PSK_IDENTITY; | |
2774 | goto psk_err; | |
2775 | } | |
2776 | ||
2777 | /* create PSK pre_master_secret */ | |
2778 | pre_ms_len=2+psk_len+2+psk_len; | |
2779 | t = psk_or_pre_ms; | |
2780 | memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); | |
2781 | s2n(psk_len, t); | |
2782 | memset(t, 0, psk_len); | |
2783 | t+=psk_len; | |
2784 | s2n(psk_len, t); | |
2785 | ||
2786 | if (s->session->psk_identity != NULL) | |
2787 | OPENSSL_free(s->session->psk_identity); | |
07ef6129 | 2788 | s->session->psk_identity = BUF_strdup((char *)p); |
ddac1974 NL |
2789 | if (s->session->psk_identity == NULL) |
2790 | { | |
2791 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2792 | ERR_R_MALLOC_FAILURE); | |
2793 | goto psk_err; | |
2794 | } | |
2795 | ||
2796 | if (s->session->psk_identity_hint != NULL) | |
2797 | OPENSSL_free(s->session->psk_identity_hint); | |
2798 | s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); | |
2799 | if (s->ctx->psk_identity_hint != NULL && | |
2800 | s->session->psk_identity_hint == NULL) | |
2801 | { | |
2802 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2803 | ERR_R_MALLOC_FAILURE); | |
2804 | goto psk_err; | |
2805 | } | |
2806 | ||
2807 | s->session->master_key_length= | |
2808 | s->method->ssl3_enc->generate_master_secret(s, | |
2809 | s->session->master_key, psk_or_pre_ms, pre_ms_len); | |
2810 | psk_err = 0; | |
2811 | psk_err: | |
2812 | OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); | |
52b8dad8 BM |
2813 | if (psk_err != 0) |
2814 | goto f_err; | |
ddac1974 NL |
2815 | } |
2816 | else | |
ea262260 | 2817 | #endif |
edc032b5 BL |
2818 | #ifndef OPENSSL_NO_SRP |
2819 | if (alg_k & SSL_kSRP) | |
2820 | { | |
2821 | int param_len; | |
2822 | ||
2823 | n2s(p,i); | |
2824 | param_len=i+2; | |
2825 | if (param_len > n) | |
2826 | { | |
2827 | al=SSL_AD_DECODE_ERROR; | |
23bc7961 | 2828 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_SRP_A_LENGTH); |
edc032b5 BL |
2829 | goto f_err; |
2830 | } | |
2831 | if (!(s->srp_ctx.A=BN_bin2bn(p,i,NULL))) | |
2832 | { | |
23bc7961 | 2833 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_BN_LIB); |
edc032b5 BL |
2834 | goto err; |
2835 | } | |
2836 | if (s->session->srp_username != NULL) | |
2837 | OPENSSL_free(s->session->srp_username); | |
2838 | s->session->srp_username = BUF_strdup(s->srp_ctx.login); | |
2839 | if (s->session->srp_username == NULL) | |
2840 | { | |
2841 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2842 | ERR_R_MALLOC_FAILURE); | |
2843 | goto err; | |
2844 | } | |
2845 | ||
2846 | if ((s->session->master_key_length = SRP_generate_server_master_secret(s,s->session->master_key))<0) | |
2847 | { | |
23bc7961 | 2848 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); |
edc032b5 BL |
2849 | goto err; |
2850 | } | |
2851 | ||
2852 | p+=i; | |
2853 | } | |
2854 | else | |
2855 | #endif /* OPENSSL_NO_SRP */ | |
0e1dba93 | 2856 | if (alg_k & SSL_kGOST) |
f0288f05 DSH |
2857 | { |
2858 | int ret = 0; | |
0e1dba93 | 2859 | EVP_PKEY_CTX *pkey_ctx; |
e827b587 | 2860 | EVP_PKEY *client_pub_pkey = NULL, *pk = NULL; |
f0288f05 | 2861 | unsigned char premaster_secret[32], *start; |
e827b587 DSH |
2862 | size_t outlen=32, inlen; |
2863 | unsigned long alg_a; | |
0e1dba93 | 2864 | |
f0288f05 | 2865 | /* Get our certificate private key*/ |
e827b587 DSH |
2866 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; |
2867 | if (alg_a & SSL_aGOST94) | |
2868 | pk = s->cert->pkeys[SSL_PKEY_GOST94].privatekey; | |
2869 | else if (alg_a & SSL_aGOST01) | |
2870 | pk = s->cert->pkeys[SSL_PKEY_GOST01].privatekey; | |
2871 | ||
2872 | pkey_ctx = EVP_PKEY_CTX_new(pk,NULL); | |
0e1dba93 | 2873 | EVP_PKEY_decrypt_init(pkey_ctx); |
f0288f05 DSH |
2874 | /* If client certificate is present and is of the same type, maybe |
2875 | * use it for key exchange. Don't mind errors from | |
2876 | * EVP_PKEY_derive_set_peer, because it is completely valid to use | |
2877 | * a client certificate for authorization only. */ | |
2878 | client_pub_pkey = X509_get_pubkey(s->session->peer); | |
2879 | if (client_pub_pkey) | |
2880 | { | |
2881 | if (EVP_PKEY_derive_set_peer(pkey_ctx, client_pub_pkey) <= 0) | |
2882 | ERR_clear_error(); | |
2883 | } | |
0e1dba93 | 2884 | /* Decrypt session key */ |
f0288f05 | 2885 | if ((*p!=( V_ASN1_SEQUENCE| V_ASN1_CONSTRUCTED))) |
0e1dba93 DSH |
2886 | { |
2887 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED); | |
f0288f05 DSH |
2888 | goto gerr; |
2889 | } | |
2890 | if (p[1] == 0x81) | |
2891 | { | |
2892 | start = p+3; | |
2893 | inlen = p[2]; | |
2894 | } | |
2895 | else if (p[1] < 0x80) | |
2896 | { | |
2897 | start = p+2; | |
2898 | inlen = p[1]; | |
2899 | } | |
2900 | else | |
2901 | { | |
2902 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED); | |
2903 | goto gerr; | |
2904 | } | |
2905 | if (EVP_PKEY_decrypt(pkey_ctx,premaster_secret,&outlen,start,inlen) <=0) | |
0e1dba93 DSH |
2906 | |
2907 | { | |
2908 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED); | |
f0288f05 | 2909 | goto gerr; |
0e1dba93 DSH |
2910 | } |
2911 | /* Generate master secret */ | |
0e1dba93 DSH |
2912 | s->session->master_key_length= |
2913 | s->method->ssl3_enc->generate_master_secret(s, | |
2914 | s->session->master_key,premaster_secret,32); | |
f0288f05 DSH |
2915 | /* Check if pubkey from client certificate was used */ |
2916 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) | |
2917 | ret = 2; | |
2918 | else | |
2919 | ret = 1; | |
2920 | gerr: | |
2921 | EVP_PKEY_free(client_pub_pkey); | |
2922 | EVP_PKEY_CTX_free(pkey_ctx); | |
2923 | if (ret) | |
2924 | return ret; | |
2925 | else | |
2926 | goto err; | |
2927 | } | |
0e1dba93 | 2928 | else |
d02b48c6 | 2929 | { |
58964a49 | 2930 | al=SSL_AD_HANDSHAKE_FAILURE; |
2a1ef754 RL |
2931 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2932 | SSL_R_UNKNOWN_CIPHER_TYPE); | |
d02b48c6 RE |
2933 | goto f_err; |
2934 | } | |
2935 | ||
2936 | return(1); | |
2937 | f_err: | |
2938 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
edc032b5 | 2939 | #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_SRP) |
d02b48c6 | 2940 | err: |
ea262260 | 2941 | #endif |
d020e701 | 2942 | #ifndef OPENSSL_NO_ECDH |
ea262260 BM |
2943 | EVP_PKEY_free(clnt_pub_pkey); |
2944 | EC_POINT_free(clnt_ecpoint); | |
2945 | if (srvr_ecdh != NULL) | |
ea262260 | 2946 | EC_KEY_free(srvr_ecdh); |
ea262260 | 2947 | BN_CTX_free(bn_ctx); |
58964a49 | 2948 | #endif |
d02b48c6 RE |
2949 | return(-1); |
2950 | } | |
2951 | ||
36d16f8e | 2952 | int ssl3_get_cert_verify(SSL *s) |
d02b48c6 RE |
2953 | { |
2954 | EVP_PKEY *pkey=NULL; | |
2955 | unsigned char *p; | |
2956 | int al,ok,ret=0; | |
2957 | long n; | |
2958 | int type=0,i,j; | |
2959 | X509 *peer; | |
f37f20ff DSH |
2960 | const EVP_MD *md = NULL; |
2961 | EVP_MD_CTX mctx; | |
2962 | EVP_MD_CTX_init(&mctx); | |
d02b48c6 | 2963 | |
36d16f8e | 2964 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
2965 | SSL3_ST_SR_CERT_VRFY_A, |
2966 | SSL3_ST_SR_CERT_VRFY_B, | |
2967 | -1, | |
59e68615 | 2968 | 516, /* Enough for 4096 bit RSA key with TLS v1.2 */ |
d02b48c6 RE |
2969 | &ok); |
2970 | ||
2971 | if (!ok) return((int)n); | |
2972 | ||
2973 | if (s->session->peer != NULL) | |
2974 | { | |
2975 | peer=s->session->peer; | |
2976 | pkey=X509_get_pubkey(peer); | |
2977 | type=X509_certificate_type(peer,pkey); | |
2978 | } | |
2979 | else | |
2980 | { | |
2981 | peer=NULL; | |
2982 | pkey=NULL; | |
2983 | } | |
2984 | ||
2985 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY) | |
2986 | { | |
2987 | s->s3->tmp.reuse_message=1; | |
2988 | if ((peer != NULL) && (type | EVP_PKT_SIGN)) | |
2989 | { | |
58964a49 | 2990 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 | 2991 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE); |
d02b48c6 RE |
2992 | goto f_err; |
2993 | } | |
2994 | ret=1; | |
2995 | goto end; | |
2996 | } | |
2997 | ||
2998 | if (peer == NULL) | |
2999 | { | |
3000 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED); | |
58964a49 | 3001 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
3002 | goto f_err; |
3003 | } | |
3004 | ||
3005 | if (!(type & EVP_PKT_SIGN)) | |
3006 | { | |
3007 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE); | |
58964a49 | 3008 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
3009 | goto f_err; |
3010 | } | |
3011 | ||
3012 | if (s->s3->change_cipher_spec) | |
3013 | { | |
3014 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY); | |
58964a49 | 3015 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
3016 | goto f_err; |
3017 | } | |
3018 | ||
3019 | /* we now have a signature that we need to verify */ | |
48948d53 | 3020 | p=(unsigned char *)s->init_msg; |
0e1dba93 DSH |
3021 | /* Check for broken implementations of GOST ciphersuites */ |
3022 | /* If key is GOST and n is exactly 64, it is bare | |
3023 | * signature without length field */ | |
3024 | if (n==64 && (pkey->type==NID_id_GostR3410_94 || | |
3025 | pkey->type == NID_id_GostR3410_2001) ) | |
d02b48c6 | 3026 | { |
0e1dba93 DSH |
3027 | i=64; |
3028 | } | |
3029 | else | |
3030 | { | |
238b6361 | 3031 | if (TLS1_get_version(s) >= TLS1_2_VERSION) |
f37f20ff DSH |
3032 | { |
3033 | int sigalg = tls12_get_sigid(pkey); | |
3034 | /* Should never happen */ | |
3035 | if (sigalg == -1) | |
3036 | { | |
3037 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR); | |
3038 | al=SSL_AD_INTERNAL_ERROR; | |
3039 | goto f_err; | |
3040 | } | |
3041 | /* Check key type is consistent with signature */ | |
3042 | if (sigalg != (int)p[1]) | |
3043 | { | |
3044 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_TYPE); | |
3045 | al=SSL_AD_DECODE_ERROR; | |
3046 | goto f_err; | |
3047 | } | |
3048 | md = tls12_get_hash(p[0]); | |
3049 | if (md == NULL) | |
3050 | { | |
4f8f8bf3 | 3051 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_UNKNOWN_DIGEST); |
f37f20ff DSH |
3052 | al=SSL_AD_DECODE_ERROR; |
3053 | goto f_err; | |
3054 | } | |
3055 | #ifdef SSL_DEBUG | |
3056 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); | |
3057 | #endif | |
3058 | p += 2; | |
3059 | n -= 2; | |
3060 | } | |
0e1dba93 DSH |
3061 | n2s(p,i); |
3062 | n-=2; | |
3063 | if (i > n) | |
3064 | { | |
3065 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH); | |
3066 | al=SSL_AD_DECODE_ERROR; | |
3067 | goto f_err; | |
3068 | } | |
3069 | } | |
d02b48c6 RE |
3070 | j=EVP_PKEY_size(pkey); |
3071 | if ((i > j) || (n > j) || (n <= 0)) | |
3072 | { | |
3073 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE); | |
58964a49 | 3074 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
3075 | goto f_err; |
3076 | } | |
3077 | ||
238b6361 | 3078 | if (TLS1_get_version(s) >= TLS1_2_VERSION) |
f37f20ff DSH |
3079 | { |
3080 | long hdatalen = 0; | |
3081 | void *hdata; | |
3082 | hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); | |
3083 | if (hdatalen <= 0) | |
3084 | { | |
3085 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, ERR_R_INTERNAL_ERROR); | |
3086 | al=SSL_AD_INTERNAL_ERROR; | |
3087 | goto f_err; | |
3088 | } | |
3089 | #ifdef SSL_DEBUG | |
3090 | fprintf(stderr, "Using TLS 1.2 with client verify alg %s\n", | |
3091 | EVP_MD_name(md)); | |
3092 | #endif | |
3093 | if (!EVP_VerifyInit_ex(&mctx, md, NULL) | |
3094 | || !EVP_VerifyUpdate(&mctx, hdata, hdatalen)) | |
3095 | { | |
3096 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, ERR_R_EVP_LIB); | |
3097 | al=SSL_AD_INTERNAL_ERROR; | |
3098 | goto f_err; | |
3099 | } | |
3100 | ||
3101 | if (EVP_VerifyFinal(&mctx, p , i, pkey) <= 0) | |
3102 | { | |
3103 | al=SSL_AD_DECRYPT_ERROR; | |
3104 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_SIGNATURE); | |
3105 | goto f_err; | |
3106 | } | |
3107 | } | |
3108 | else | |
bc36ee62 | 3109 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
3110 | if (pkey->type == EVP_PKEY_RSA) |
3111 | { | |
f2d9a32c | 3112 | i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md, |
1c80019a DSH |
3113 | MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i, |
3114 | pkey->pkey.rsa); | |
d02b48c6 RE |
3115 | if (i < 0) |
3116 | { | |
58964a49 | 3117 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
3118 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT); |
3119 | goto f_err; | |
3120 | } | |
1c80019a | 3121 | if (i == 0) |
d02b48c6 | 3122 | { |
58964a49 | 3123 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
3124 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE); |
3125 | goto f_err; | |
3126 | } | |
3127 | } | |
3128 | else | |
3129 | #endif | |
bc36ee62 | 3130 | #ifndef OPENSSL_NO_DSA |
d02b48c6 RE |
3131 | if (pkey->type == EVP_PKEY_DSA) |
3132 | { | |
58964a49 | 3133 | j=DSA_verify(pkey->save_type, |
f2d9a32c | 3134 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]), |
d02b48c6 RE |
3135 | SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa); |
3136 | if (j <= 0) | |
3137 | { | |
3138 | /* bad signature */ | |
58964a49 | 3139 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
3140 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE); |
3141 | goto f_err; | |
3142 | } | |
3143 | } | |
3144 | else | |
ea262260 BM |
3145 | #endif |
3146 | #ifndef OPENSSL_NO_ECDSA | |
5488bb61 | 3147 | if (pkey->type == EVP_PKEY_EC) |
ea262260 BM |
3148 | { |
3149 | j=ECDSA_verify(pkey->save_type, | |
3150 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]), | |
9dd84053 | 3151 | SHA_DIGEST_LENGTH,p,i,pkey->pkey.ec); |
ea262260 BM |
3152 | if (j <= 0) |
3153 | { | |
3154 | /* bad signature */ | |
3155 | al=SSL_AD_DECRYPT_ERROR; | |
3156 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, | |
3157 | SSL_R_BAD_ECDSA_SIGNATURE); | |
3158 | goto f_err; | |
3159 | } | |
3160 | } | |
3161 | else | |
d02b48c6 | 3162 | #endif |
0e1dba93 DSH |
3163 | if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) |
3164 | { unsigned char signature[64]; | |
3165 | int idx; | |
3166 | EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new(pkey,NULL); | |
3167 | EVP_PKEY_verify_init(pctx); | |
3168 | if (i!=64) { | |
3169 | fprintf(stderr,"GOST signature length is %d",i); | |
3170 | } | |
3171 | for (idx=0;idx<64;idx++) { | |
3172 | signature[63-idx]=p[idx]; | |
3173 | } | |
3174 | j=EVP_PKEY_verify(pctx,signature,64,s->s3->tmp.cert_verify_md,32); | |
3175 | EVP_PKEY_CTX_free(pctx); | |
3176 | if (j<=0) | |
3177 | { | |
3178 | al=SSL_AD_DECRYPT_ERROR; | |
3179 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, | |
3180 | SSL_R_BAD_ECDSA_SIGNATURE); | |
3181 | goto f_err; | |
3182 | } | |
3183 | } | |
3184 | else | |
d02b48c6 | 3185 | { |
5277d7cb | 3186 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR); |
58964a49 | 3187 | al=SSL_AD_UNSUPPORTED_CERTIFICATE; |
d02b48c6 RE |
3188 | goto f_err; |
3189 | } | |
3190 | ||
3191 | ||
3192 | ret=1; | |
3193 | if (0) | |
3194 | { | |
3195 | f_err: | |
3196 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
3197 | } | |
3198 | end: | |
f37f20ff DSH |
3199 | if (s->s3->handshake_buffer) |
3200 | { | |
3201 | BIO_free(s->s3->handshake_buffer); | |
3202 | s->s3->handshake_buffer = NULL; | |
3203 | s->s3->flags &= ~TLS1_FLAGS_KEEP_HANDSHAKE; | |
3204 | } | |
3205 | EVP_MD_CTX_cleanup(&mctx); | |
a8236c8c | 3206 | EVP_PKEY_free(pkey); |
d02b48c6 RE |
3207 | return(ret); |
3208 | } | |
3209 | ||
36d16f8e | 3210 | int ssl3_get_client_certificate(SSL *s) |
d02b48c6 RE |
3211 | { |
3212 | int i,ok,al,ret= -1; | |
3213 | X509 *x=NULL; | |
3214 | unsigned long l,nc,llen,n; | |
875a644a RL |
3215 | const unsigned char *p,*q; |
3216 | unsigned char *d; | |
f73e07cf | 3217 | STACK_OF(X509) *sk=NULL; |
d02b48c6 | 3218 | |
36d16f8e | 3219 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
3220 | SSL3_ST_SR_CERT_A, |
3221 | SSL3_ST_SR_CERT_B, | |
3222 | -1, | |
c0f5dd07 | 3223 | s->max_cert_list, |
d02b48c6 RE |
3224 | &ok); |
3225 | ||
3226 | if (!ok) return((int)n); | |
3227 | ||
3228 | if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE) | |
3229 | { | |
3230 | if ( (s->verify_mode & SSL_VERIFY_PEER) && | |
3231 | (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) | |
3232 | { | |
3233 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
58964a49 RE |
3234 | al=SSL_AD_HANDSHAKE_FAILURE; |
3235 | goto f_err; | |
3236 | } | |
47134b78 | 3237 | /* If tls asked for a client cert, the client must return a 0 list */ |
58964a49 RE |
3238 | if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request) |
3239 | { | |
3240 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST); | |
3241 | al=SSL_AD_UNEXPECTED_MESSAGE; | |
d02b48c6 RE |
3242 | goto f_err; |
3243 | } | |
3244 | s->s3->tmp.reuse_message=1; | |
3245 | return(1); | |
3246 | } | |
3247 | ||
3248 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) | |
3249 | { | |
58964a49 | 3250 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
3251 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE); |
3252 | goto f_err; | |
3253 | } | |
875a644a | 3254 | p=d=(unsigned char *)s->init_msg; |
d02b48c6 | 3255 | |
f73e07cf | 3256 | if ((sk=sk_X509_new_null()) == NULL) |
d02b48c6 RE |
3257 | { |
3258 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
3259 | goto err; | |
3260 | } | |
3261 | ||
3262 | n2l3(p,llen); | |
3263 | if (llen+3 != n) | |
3264 | { | |
58964a49 | 3265 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
3266 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH); |
3267 | goto f_err; | |
3268 | } | |
3269 | for (nc=0; nc<llen; ) | |
3270 | { | |
3271 | n2l3(p,l); | |
3272 | if ((l+nc+3) > llen) | |
3273 | { | |
58964a49 | 3274 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
3275 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); |
3276 | goto f_err; | |
3277 | } | |
3278 | ||
3279 | q=p; | |
3280 | x=d2i_X509(NULL,&p,l); | |
3281 | if (x == NULL) | |
3282 | { | |
3283 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB); | |
3284 | goto err; | |
3285 | } | |
3286 | if (p != (q+l)) | |
3287 | { | |
58964a49 | 3288 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
3289 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); |
3290 | goto f_err; | |
3291 | } | |
f73e07cf | 3292 | if (!sk_X509_push(sk,x)) |
d02b48c6 RE |
3293 | { |
3294 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
3295 | goto err; | |
3296 | } | |
3297 | x=NULL; | |
3298 | nc+=l+3; | |
3299 | } | |
3300 | ||
f73e07cf | 3301 | if (sk_X509_num(sk) <= 0) |
d02b48c6 | 3302 | { |
58964a49 RE |
3303 | /* TLS does not mind 0 certs returned */ |
3304 | if (s->version == SSL3_VERSION) | |
3305 | { | |
3306 | al=SSL_AD_HANDSHAKE_FAILURE; | |
3307 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED); | |
3308 | goto f_err; | |
3309 | } | |
3310 | /* Fail for TLS only if we required a certificate */ | |
3311 | else if ((s->verify_mode & SSL_VERIFY_PEER) && | |
3312 | (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) | |
3313 | { | |
3314 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
3315 | al=SSL_AD_HANDSHAKE_FAILURE; | |
3316 | goto f_err; | |
3317 | } | |
f37f20ff DSH |
3318 | /* No client certificate so digest cached records */ |
3319 | if (s->s3->handshake_buffer && !ssl3_digest_cached_records(s)) | |
3320 | { | |
3321 | al=SSL_AD_INTERNAL_ERROR; | |
3322 | goto f_err; | |
3323 | } | |
d02b48c6 | 3324 | } |
58964a49 | 3325 | else |
d02b48c6 | 3326 | { |
58964a49 | 3327 | i=ssl_verify_cert_chain(s,sk); |
bab53405 | 3328 | if (i <= 0) |
58964a49 RE |
3329 | { |
3330 | al=ssl_verify_alarm_type(s->verify_result); | |
3331 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED); | |
3332 | goto f_err; | |
3333 | } | |
d02b48c6 RE |
3334 | } |
3335 | ||
b56bce4f | 3336 | if (s->session->peer != NULL) /* This should not be needed */ |
d02b48c6 | 3337 | X509_free(s->session->peer); |
f73e07cf | 3338 | s->session->peer=sk_X509_shift(sk); |
b1fe6ca1 | 3339 | s->session->verify_result = s->verify_result; |
8051996a | 3340 | |
b56bce4f BM |
3341 | /* With the current implementation, sess_cert will always be NULL |
3342 | * when we arrive here. */ | |
3343 | if (s->session->sess_cert == NULL) | |
3344 | { | |
3345 | s->session->sess_cert = ssl_sess_cert_new(); | |
3346 | if (s->session->sess_cert == NULL) | |
3347 | { | |
3348 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE); | |
3349 | goto err; | |
3350 | } | |
3351 | } | |
3352 | if (s->session->sess_cert->cert_chain != NULL) | |
3353 | sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free); | |
9d5cceac | 3354 | s->session->sess_cert->cert_chain=sk; |
98e04f9e BM |
3355 | /* Inconsistency alert: cert_chain does *not* include the |
3356 | * peer's own certificate, while we do include it in s3_clnt.c */ | |
8051996a | 3357 | |
b4cadc6e | 3358 | sk=NULL; |
d02b48c6 RE |
3359 | |
3360 | ret=1; | |
3361 | if (0) | |
3362 | { | |
3363 | f_err: | |
3364 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
3365 | } | |
3366 | err: | |
3367 | if (x != NULL) X509_free(x); | |
f73e07cf | 3368 | if (sk != NULL) sk_X509_pop_free(sk,X509_free); |
d02b48c6 RE |
3369 | return(ret); |
3370 | } | |
3371 | ||
6b691a5c | 3372 | int ssl3_send_server_certificate(SSL *s) |
d02b48c6 RE |
3373 | { |
3374 | unsigned long l; | |
c526ed41 | 3375 | CERT_PKEY *cpk; |
d02b48c6 RE |
3376 | |
3377 | if (s->state == SSL3_ST_SW_CERT_A) | |
3378 | { | |
c526ed41 DSH |
3379 | cpk=ssl_get_server_send_pkey(s); |
3380 | if (cpk == NULL) | |
52b8dad8 BM |
3381 | { |
3382 | /* VRS: allow null cert if auth == KRB5 */ | |
3383 | if ((s->s3->tmp.new_cipher->algorithm_auth != SSL_aKRB5) || | |
3384 | (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5)) | |
3385 | { | |
3386 | SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR); | |
3387 | return(0); | |
3388 | } | |
d02b48c6 RE |
3389 | } |
3390 | ||
c526ed41 | 3391 | l=ssl3_output_cert_chain(s,cpk); |
d02b48c6 RE |
3392 | s->state=SSL3_ST_SW_CERT_B; |
3393 | s->init_num=(int)l; | |
3394 | s->init_off=0; | |
3395 | } | |
3396 | ||
3397 | /* SSL3_ST_SW_CERT_B */ | |
3398 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
3399 | } | |
c519e89f | 3400 | |
ddd3a617 | 3401 | #ifndef OPENSSL_NO_TLSEXT |
c519e89f | 3402 | /* send a new session ticket (not necessarily for a new session) */ |
6434abbf DSH |
3403 | int ssl3_send_newsession_ticket(SSL *s) |
3404 | { | |
3405 | if (s->state == SSL3_ST_SW_SESSION_TICKET_A) | |
3406 | { | |
3407 | unsigned char *p, *senc, *macstart; | |
c519e89f BM |
3408 | const unsigned char *const_p; |
3409 | int len, slen_full, slen; | |
3410 | SSL_SESSION *sess; | |
6434abbf DSH |
3411 | unsigned int hlen; |
3412 | EVP_CIPHER_CTX ctx; | |
3413 | HMAC_CTX hctx; | |
661dc143 | 3414 | SSL_CTX *tctx = s->initial_ctx; |
8a2062fe DSH |
3415 | unsigned char iv[EVP_MAX_IV_LENGTH]; |
3416 | unsigned char key_name[16]; | |
6434abbf DSH |
3417 | |
3418 | /* get session encoding length */ | |
c519e89f | 3419 | slen_full = i2d_SSL_SESSION(s->session, NULL); |
6434abbf DSH |
3420 | /* Some length values are 16 bits, so forget it if session is |
3421 | * too long | |
3422 | */ | |
c519e89f BM |
3423 | if (slen_full > 0xFF00) |
3424 | return -1; | |
3425 | senc = OPENSSL_malloc(slen_full); | |
3426 | if (!senc) | |
3427 | return -1; | |
3428 | p = senc; | |
3429 | i2d_SSL_SESSION(s->session, &p); | |
3430 | ||
3431 | /* create a fresh copy (not shared with other threads) to clean up */ | |
3432 | const_p = senc; | |
3433 | sess = d2i_SSL_SESSION(NULL, &const_p, slen_full); | |
3434 | if (sess == NULL) | |
3435 | { | |
3436 | OPENSSL_free(senc); | |
6434abbf | 3437 | return -1; |
c519e89f BM |
3438 | } |
3439 | sess->session_id_length = 0; /* ID is irrelevant for the ticket */ | |
3440 | ||
3441 | slen = i2d_SSL_SESSION(sess, NULL); | |
3442 | if (slen > slen_full) /* shouldn't ever happen */ | |
3443 | { | |
3444 | OPENSSL_free(senc); | |
3445 | return -1; | |
3446 | } | |
3447 | p = senc; | |
3448 | i2d_SSL_SESSION(sess, &p); | |
3449 | SSL_SESSION_free(sess); | |
3450 | ||
6434abbf DSH |
3451 | /* Grow buffer if need be: the length calculation is as |
3452 | * follows 1 (size of message name) + 3 (message length | |
3453 | * bytes) + 4 (ticket lifetime hint) + 2 (ticket length) + | |
3454 | * 16 (key name) + max_iv_len (iv length) + | |
3455 | * session_length + max_enc_block_size (max encrypted session | |
3456 | * length) + max_md_size (HMAC). | |
3457 | */ | |
3458 | if (!BUF_MEM_grow(s->init_buf, | |
3459 | 26 + EVP_MAX_IV_LENGTH + EVP_MAX_BLOCK_LENGTH + | |
3460 | EVP_MAX_MD_SIZE + slen)) | |
3461 | return -1; | |
6434abbf DSH |
3462 | |
3463 | p=(unsigned char *)s->init_buf->data; | |
3464 | /* do the header */ | |
3465 | *(p++)=SSL3_MT_NEWSESSION_TICKET; | |
3466 | /* Skip message length for now */ | |
3467 | p += 3; | |
8a2062fe DSH |
3468 | EVP_CIPHER_CTX_init(&ctx); |
3469 | HMAC_CTX_init(&hctx); | |
3470 | /* Initialize HMAC and cipher contexts. If callback present | |
3471 | * it does all the work otherwise use generated values | |
3472 | * from parent ctx. | |
3473 | */ | |
661dc143 | 3474 | if (tctx->tlsext_ticket_key_cb) |
8a2062fe | 3475 | { |
661dc143 | 3476 | if (tctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx, |
8a2062fe DSH |
3477 | &hctx, 1) < 0) |
3478 | { | |
3479 | OPENSSL_free(senc); | |
3480 | return -1; | |
3481 | } | |
3482 | } | |
3483 | else | |
3484 | { | |
3485 | RAND_pseudo_bytes(iv, 16); | |
3486 | EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL, | |
661dc143 DSH |
3487 | tctx->tlsext_tick_aes_key, iv); |
3488 | HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16, | |
8a2062fe | 3489 | tlsext_tick_md(), NULL); |
661dc143 | 3490 | memcpy(key_name, tctx->tlsext_tick_key_name, 16); |
8a2062fe | 3491 | } |
c519e89f BM |
3492 | |
3493 | /* Ticket lifetime hint (advisory only): | |
3494 | * We leave this unspecified for resumed session (for simplicity), | |
3495 | * and guess that tickets for new sessions will live as long | |
3496 | * as their sessions. */ | |
3497 | l2n(s->hit ? 0 : s->session->timeout, p); | |
3498 | ||
6434abbf DSH |
3499 | /* Skip ticket length for now */ |
3500 | p += 2; | |
3501 | /* Output key name */ | |
3502 | macstart = p; | |
8a2062fe | 3503 | memcpy(p, key_name, 16); |
6434abbf | 3504 | p += 16; |
8a2062fe DSH |
3505 | /* output IV */ |
3506 | memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx)); | |
3507 | p += EVP_CIPHER_CTX_iv_length(&ctx); | |
6434abbf | 3508 | /* Encrypt session data */ |
43982224 | 3509 | EVP_EncryptUpdate(&ctx, p, &len, senc, slen); |
6434abbf | 3510 | p += len; |
43982224 | 3511 | EVP_EncryptFinal(&ctx, p, &len); |
6434abbf | 3512 | p += len; |
71af26b5 | 3513 | EVP_CIPHER_CTX_cleanup(&ctx); |
43982224 DSH |
3514 | |
3515 | HMAC_Update(&hctx, macstart, p - macstart); | |
3516 | HMAC_Final(&hctx, p, &hlen); | |
6434abbf DSH |
3517 | HMAC_CTX_cleanup(&hctx); |
3518 | ||
3519 | p += hlen; | |
3520 | /* Now write out lengths: p points to end of data written */ | |
3521 | /* Total length */ | |
3522 | len = p - (unsigned char *)s->init_buf->data; | |
3523 | p=(unsigned char *)s->init_buf->data + 1; | |
3524 | l2n3(len - 4, p); /* Message length */ | |
3525 | p += 4; | |
3526 | s2n(len - 10, p); /* Ticket length */ | |
3527 | ||
3528 | /* number of bytes to write */ | |
3529 | s->init_num= len; | |
3530 | s->state=SSL3_ST_SW_SESSION_TICKET_B; | |
3531 | s->init_off=0; | |
3532 | OPENSSL_free(senc); | |
3533 | } | |
3534 | ||
3535 | /* SSL3_ST_SW_SESSION_TICKET_B */ | |
3536 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
3537 | } | |
67c8e7f4 DSH |
3538 | |
3539 | int ssl3_send_cert_status(SSL *s) | |
3540 | { | |
3541 | if (s->state == SSL3_ST_SW_CERT_STATUS_A) | |
3542 | { | |
3543 | unsigned char *p; | |
3544 | /* Grow buffer if need be: the length calculation is as | |
3545 | * follows 1 (message type) + 3 (message length) + | |
3546 | * 1 (ocsp response type) + 3 (ocsp response length) | |
3547 | * + (ocsp response) | |
3548 | */ | |
3549 | if (!BUF_MEM_grow(s->init_buf, 8 + s->tlsext_ocsp_resplen)) | |
3550 | return -1; | |
3551 | ||
3552 | p=(unsigned char *)s->init_buf->data; | |
3553 | ||
3554 | /* do the header */ | |
3555 | *(p++)=SSL3_MT_CERTIFICATE_STATUS; | |
3556 | /* message length */ | |
3557 | l2n3(s->tlsext_ocsp_resplen + 4, p); | |
3558 | /* status type */ | |
3559 | *(p++)= s->tlsext_status_type; | |
3560 | /* length of OCSP response */ | |
3561 | l2n3(s->tlsext_ocsp_resplen, p); | |
3562 | /* actual response */ | |
3563 | memcpy(p, s->tlsext_ocsp_resp, s->tlsext_ocsp_resplen); | |
3564 | /* number of bytes to write */ | |
3565 | s->init_num = 8 + s->tlsext_ocsp_resplen; | |
3566 | s->state=SSL3_ST_SW_CERT_STATUS_B; | |
3567 | s->init_off = 0; | |
3568 | } | |
3569 | ||
3570 | /* SSL3_ST_SW_CERT_STATUS_B */ | |
3571 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
3572 | } | |
ee2ffc27 BL |
3573 | |
3574 | # ifndef OPENSSL_NO_NPN | |
3575 | /* ssl3_get_next_proto reads a Next Protocol Negotiation handshake message. It | |
3576 | * sets the next_proto member in s if found */ | |
3577 | int ssl3_get_next_proto(SSL *s) | |
3578 | { | |
3579 | int ok; | |
5df2a249 | 3580 | int proto_len, padding_len; |
ee2ffc27 BL |
3581 | long n; |
3582 | const unsigned char *p; | |
3583 | ||
3584 | /* Clients cannot send a NextProtocol message if we didn't see the | |
3585 | * extension in their ClientHello */ | |
3586 | if (!s->s3->next_proto_neg_seen) | |
3587 | { | |
3588 | SSLerr(SSL_F_SSL3_GET_NEXT_PROTO,SSL_R_GOT_NEXT_PROTO_WITHOUT_EXTENSION); | |
3589 | return -1; | |
3590 | } | |
3591 | ||
3592 | n=s->method->ssl_get_message(s, | |
3593 | SSL3_ST_SR_NEXT_PROTO_A, | |
3594 | SSL3_ST_SR_NEXT_PROTO_B, | |
3595 | SSL3_MT_NEXT_PROTO, | |
bf48836c | 3596 | 514, /* See the payload format below */ |
ee2ffc27 BL |
3597 | &ok); |
3598 | ||
3599 | if (!ok) | |
3600 | return((int)n); | |
3601 | ||
3602 | /* s->state doesn't reflect whether ChangeCipherSpec has been received | |
3603 | * in this handshake, but s->s3->change_cipher_spec does (will be reset | |
3604 | * by ssl3_get_finished). */ | |
3605 | if (!s->s3->change_cipher_spec) | |
3606 | { | |
3607 | SSLerr(SSL_F_SSL3_GET_NEXT_PROTO,SSL_R_GOT_NEXT_PROTO_BEFORE_A_CCS); | |
3608 | return -1; | |
3609 | } | |
3610 | ||
3611 | if (n < 2) | |
3612 | return 0; /* The body must be > 1 bytes long */ | |
3613 | ||
3614 | p=(unsigned char *)s->init_msg; | |
3615 | ||
3616 | /* The payload looks like: | |
3617 | * uint8 proto_len; | |
3618 | * uint8 proto[proto_len]; | |
3619 | * uint8 padding_len; | |
3620 | * uint8 padding[padding_len]; | |
3621 | */ | |
3622 | proto_len = p[0]; | |
3623 | if (proto_len + 2 > s->init_num) | |
3624 | return 0; | |
3625 | padding_len = p[proto_len + 1]; | |
3626 | if (proto_len + padding_len + 2 != s->init_num) | |
3627 | return 0; | |
3628 | ||
3629 | s->next_proto_negotiated = OPENSSL_malloc(proto_len); | |
3630 | if (!s->next_proto_negotiated) | |
3631 | { | |
3632 | SSLerr(SSL_F_SSL3_GET_NEXT_PROTO,ERR_R_MALLOC_FAILURE); | |
3633 | return 0; | |
3634 | } | |
3635 | memcpy(s->next_proto_negotiated, p + 1, proto_len); | |
3636 | s->next_proto_negotiated_len = proto_len; | |
3637 | ||
3638 | return 1; | |
3639 | } | |
3640 | # endif | |
6434abbf | 3641 | #endif |