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cbb92dfa | 1 | /* ssl/s3_srvr.c -*- mode:C; c-file-style: "eay" -*- */ |
58964a49 | 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
d02b48c6 RE |
3 | * All rights reserved. |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
8 | * | |
9 | * This library is free for commercial and non-commercial use as long as | |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
15 | * | |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in | |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
22 | * | |
23 | * Redistribution and use in source and binary forms, with or without | |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
37 | * 4. If you include any Windows specific code (or a derivative thereof) from | |
38 | * the apps directory (application code) you must include an acknowledgement: | |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40 | * | |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
52 | * | |
53 | * The licence and distribution terms for any publically available version or | |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
8e2f6b79 | 58 | /* ==================================================================== |
52b8dad8 | 59 | * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. |
8e2f6b79 BM |
60 | * |
61 | * Redistribution and use in source and binary forms, with or without | |
62 | * modification, are permitted provided that the following conditions | |
63 | * are met: | |
64 | * | |
65 | * 1. Redistributions of source code must retain the above copyright | |
66 | * notice, this list of conditions and the following disclaimer. | |
67 | * | |
68 | * 2. Redistributions in binary form must reproduce the above copyright | |
69 | * notice, this list of conditions and the following disclaimer in | |
70 | * the documentation and/or other materials provided with the | |
71 | * distribution. | |
72 | * | |
73 | * 3. All advertising materials mentioning features or use of this | |
74 | * software must display the following acknowledgment: | |
75 | * "This product includes software developed by the OpenSSL Project | |
76 | * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" | |
77 | * | |
78 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
79 | * endorse or promote products derived from this software without | |
80 | * prior written permission. For written permission, please contact | |
81 | * openssl-core@openssl.org. | |
82 | * | |
83 | * 5. Products derived from this software may not be called "OpenSSL" | |
84 | * nor may "OpenSSL" appear in their names without prior written | |
85 | * permission of the OpenSSL Project. | |
86 | * | |
87 | * 6. Redistributions of any form whatsoever must retain the following | |
88 | * acknowledgment: | |
89 | * "This product includes software developed by the OpenSSL Project | |
90 | * for use in the OpenSSL Toolkit (http://www.openssl.org/)" | |
91 | * | |
92 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
93 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
94 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
95 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
96 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
97 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
98 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
99 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
100 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
101 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
102 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
103 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
104 | * ==================================================================== | |
105 | * | |
106 | * This product includes cryptographic software written by Eric Young | |
107 | * (eay@cryptsoft.com). This product includes software written by Tim | |
108 | * Hudson (tjh@cryptsoft.com). | |
109 | * | |
110 | */ | |
ea262260 BM |
111 | /* ==================================================================== |
112 | * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. | |
113 | * | |
114 | * Portions of the attached software ("Contribution") are developed by | |
115 | * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. | |
116 | * | |
117 | * The Contribution is licensed pursuant to the OpenSSL open source | |
118 | * license provided above. | |
119 | * | |
ea262260 BM |
120 | * ECC cipher suite support in OpenSSL originally written by |
121 | * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. | |
122 | * | |
123 | */ | |
ddac1974 NL |
124 | /* ==================================================================== |
125 | * Copyright 2005 Nokia. All rights reserved. | |
126 | * | |
127 | * The portions of the attached software ("Contribution") is developed by | |
128 | * Nokia Corporation and is licensed pursuant to the OpenSSL open source | |
129 | * license. | |
130 | * | |
131 | * The Contribution, originally written by Mika Kousa and Pasi Eronen of | |
132 | * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites | |
133 | * support (see RFC 4279) to OpenSSL. | |
134 | * | |
135 | * No patent licenses or other rights except those expressly stated in | |
136 | * the OpenSSL open source license shall be deemed granted or received | |
137 | * expressly, by implication, estoppel, or otherwise. | |
138 | * | |
139 | * No assurances are provided by Nokia that the Contribution does not | |
140 | * infringe the patent or other intellectual property rights of any third | |
141 | * party or that the license provides you with all the necessary rights | |
142 | * to make use of the Contribution. | |
143 | * | |
144 | * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN | |
145 | * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA | |
146 | * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY | |
147 | * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR | |
148 | * OTHERWISE. | |
149 | */ | |
d02b48c6 RE |
150 | |
151 | #define REUSE_CIPHER_BUG | |
de469ef2 DSH |
152 | #define NETSCAPE_HANG_BUG |
153 | ||
d02b48c6 | 154 | #include <stdio.h> |
7b63c0fa LJ |
155 | #include "ssl_locl.h" |
156 | #include "kssl_lcl.h" | |
ec577822 BM |
157 | #include <openssl/buffer.h> |
158 | #include <openssl/rand.h> | |
159 | #include <openssl/objects.h> | |
160 | #include <openssl/evp.h> | |
6434abbf | 161 | #include <openssl/hmac.h> |
ec577822 | 162 | #include <openssl/x509.h> |
3eeaab4b | 163 | #ifndef OPENSSL_NO_DH |
60a938c6 | 164 | #include <openssl/dh.h> |
3eeaab4b | 165 | #endif |
d095b68d | 166 | #include <openssl/bn.h> |
5fdf0666 | 167 | #ifndef OPENSSL_NO_KRB5 |
2a1ef754 | 168 | #include <openssl/krb5_asn.h> |
5fdf0666 | 169 | #endif |
dbad1690 | 170 | #include <openssl/md5.h> |
f9b3bff6 | 171 | |
4ebb342f | 172 | static const SSL_METHOD *ssl3_get_server_method(int ver); |
d02b48c6 | 173 | |
4ebb342f | 174 | static const SSL_METHOD *ssl3_get_server_method(int ver) |
d02b48c6 | 175 | { |
58964a49 | 176 | if (ver == SSL3_VERSION) |
d02b48c6 RE |
177 | return(SSLv3_server_method()); |
178 | else | |
179 | return(NULL); | |
180 | } | |
181 | ||
edc032b5 | 182 | #ifndef OPENSSL_NO_SRP |
71fa4513 | 183 | static int ssl_check_srp_ext_ClientHello(SSL *s, int *al) |
edc032b5 BL |
184 | { |
185 | int ret = SSL_ERROR_NONE; | |
186 | ||
ebba6c48 | 187 | *al = SSL_AD_UNRECOGNIZED_NAME; |
edc032b5 BL |
188 | |
189 | if ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) && | |
190 | (s->srp_ctx.TLS_ext_srp_username_callback != NULL)) | |
191 | { | |
192 | if(s->srp_ctx.login == NULL) | |
193 | { | |
ebba6c48 DSH |
194 | /* RFC 5054 says SHOULD reject, |
195 | we do so if There is no srp login name */ | |
196 | ret = SSL3_AL_FATAL; | |
197 | *al = SSL_AD_UNKNOWN_PSK_IDENTITY; | |
edc032b5 BL |
198 | } |
199 | else | |
200 | { | |
ebba6c48 | 201 | ret = SSL_srp_server_param_with_username(s,al); |
edc032b5 BL |
202 | } |
203 | } | |
204 | return ret; | |
205 | } | |
206 | #endif | |
207 | ||
f3b656b2 DSH |
208 | IMPLEMENT_ssl3_meth_func(SSLv3_server_method, |
209 | ssl3_accept, | |
210 | ssl_undefined_function, | |
211 | ssl3_get_server_method) | |
d02b48c6 | 212 | |
6b691a5c | 213 | int ssl3_accept(SSL *s) |
d02b48c6 RE |
214 | { |
215 | BUF_MEM *buf; | |
52b8dad8 | 216 | unsigned long alg_k,Time=(unsigned long)time(NULL); |
45d87a1f | 217 | void (*cb)(const SSL *ssl,int type,int val)=NULL; |
d02b48c6 | 218 | int ret= -1; |
d02b48c6 RE |
219 | int new_state,state,skip=0; |
220 | ||
eb952088 | 221 | RAND_add(&Time,sizeof(Time),0); |
d02b48c6 | 222 | ERR_clear_error(); |
58964a49 | 223 | clear_sys_error(); |
d02b48c6 RE |
224 | |
225 | if (s->info_callback != NULL) | |
226 | cb=s->info_callback; | |
227 | else if (s->ctx->info_callback != NULL) | |
228 | cb=s->ctx->info_callback; | |
229 | ||
230 | /* init things to blank */ | |
d02b48c6 | 231 | s->in_handshake++; |
979689aa | 232 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); |
d02b48c6 | 233 | |
b56bce4f | 234 | if (s->cert == NULL) |
d02b48c6 RE |
235 | { |
236 | SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET); | |
b56bce4f | 237 | return(-1); |
d02b48c6 | 238 | } |
d02b48c6 | 239 | |
4817504d DSH |
240 | #ifndef OPENSSL_NO_HEARTBEATS |
241 | /* If we're awaiting a HeartbeatResponse, pretend we | |
242 | * already got and don't await it anymore, because | |
243 | * Heartbeats don't make sense during handshakes anyway. | |
244 | */ | |
245 | if (s->tlsext_hb_pending) | |
246 | { | |
247 | s->tlsext_hb_pending = 0; | |
248 | s->tlsext_hb_seq++; | |
249 | } | |
250 | #endif | |
251 | ||
d02b48c6 RE |
252 | for (;;) |
253 | { | |
254 | state=s->state; | |
255 | ||
256 | switch (s->state) | |
257 | { | |
258 | case SSL_ST_RENEGOTIATE: | |
44959ee4 | 259 | s->renegotiate=1; |
d02b48c6 RE |
260 | /* s->state=SSL_ST_ACCEPT; */ |
261 | ||
262 | case SSL_ST_BEFORE: | |
263 | case SSL_ST_ACCEPT: | |
264 | case SSL_ST_BEFORE|SSL_ST_ACCEPT: | |
265 | case SSL_ST_OK|SSL_ST_ACCEPT: | |
266 | ||
413c4f45 | 267 | s->server=1; |
d02b48c6 RE |
268 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); |
269 | ||
58964a49 | 270 | if ((s->version>>8) != 3) |
bbb8de09 | 271 | { |
5277d7cb | 272 | SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR); |
bbb8de09 BM |
273 | return -1; |
274 | } | |
d02b48c6 RE |
275 | s->type=SSL_ST_ACCEPT; |
276 | ||
277 | if (s->init_buf == NULL) | |
278 | { | |
279 | if ((buf=BUF_MEM_new()) == NULL) | |
280 | { | |
281 | ret= -1; | |
282 | goto end; | |
283 | } | |
284 | if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) | |
285 | { | |
286 | ret= -1; | |
287 | goto end; | |
288 | } | |
289 | s->init_buf=buf; | |
290 | } | |
291 | ||
292 | if (!ssl3_setup_buffers(s)) | |
293 | { | |
294 | ret= -1; | |
295 | goto end; | |
296 | } | |
297 | ||
d02b48c6 | 298 | s->init_num=0; |
d0dc991c | 299 | s->s3->flags &= ~SSL3_FLAGS_SGC_RESTART_DONE; |
0d609395 | 300 | s->s3->flags &= ~TLS1_FLAGS_SKIP_CERT_VERIFY; |
d02b48c6 RE |
301 | |
302 | if (s->state != SSL_ST_RENEGOTIATE) | |
303 | { | |
8e2f6b79 BM |
304 | /* Ok, we now need to push on a buffering BIO so that |
305 | * the output is sent in a way that TCP likes :-) | |
306 | */ | |
307 | if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; } | |
308 | ||
745c70e5 | 309 | ssl3_init_finished_mac(s); |
d02b48c6 | 310 | s->state=SSL3_ST_SR_CLNT_HELLO_A; |
413c4f45 | 311 | s->ctx->stats.sess_accept++; |
d02b48c6 | 312 | } |
3a88efd4 DSH |
313 | else if (!s->s3->send_connection_binding && |
314 | !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) | |
315 | { | |
316 | /* Server attempting to renegotiate with | |
317 | * client that doesn't support secure | |
318 | * renegotiation. | |
319 | */ | |
320 | SSLerr(SSL_F_SSL3_ACCEPT, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED); | |
321 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); | |
322 | ret = -1; | |
323 | goto end; | |
324 | } | |
d02b48c6 RE |
325 | else |
326 | { | |
8e2f6b79 BM |
327 | /* s->state == SSL_ST_RENEGOTIATE, |
328 | * we will just send a HelloRequest */ | |
413c4f45 | 329 | s->ctx->stats.sess_accept_renegotiate++; |
d02b48c6 RE |
330 | s->state=SSL3_ST_SW_HELLO_REQ_A; |
331 | } | |
332 | break; | |
333 | ||
334 | case SSL3_ST_SW_HELLO_REQ_A: | |
335 | case SSL3_ST_SW_HELLO_REQ_B: | |
336 | ||
337 | s->shutdown=0; | |
338 | ret=ssl3_send_hello_request(s); | |
339 | if (ret <= 0) goto end; | |
340 | s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C; | |
341 | s->state=SSL3_ST_SW_FLUSH; | |
342 | s->init_num=0; | |
343 | ||
344 | ssl3_init_finished_mac(s); | |
345 | break; | |
346 | ||
347 | case SSL3_ST_SW_HELLO_REQ_C: | |
d02b48c6 | 348 | s->state=SSL_ST_OK; |
2260ad21 | 349 | break; |
d02b48c6 RE |
350 | |
351 | case SSL3_ST_SR_CLNT_HELLO_A: | |
352 | case SSL3_ST_SR_CLNT_HELLO_B: | |
353 | case SSL3_ST_SR_CLNT_HELLO_C: | |
354 | ||
c79f22c6 DSH |
355 | if (s->rwstate != SSL_X509_LOOKUP) |
356 | { | |
357 | ret=ssl3_get_client_hello(s); | |
358 | if (ret <= 0) goto end; | |
359 | } | |
edc032b5 BL |
360 | #ifndef OPENSSL_NO_SRP |
361 | { | |
ebba6c48 | 362 | int al; |
c79f22c6 DSH |
363 | if ((ret = ssl_check_srp_ext_ClientHello(s,&al)) < 0) |
364 | { | |
365 | /* callback indicates firther work to be done */ | |
366 | s->rwstate=SSL_X509_LOOKUP; | |
367 | goto end; | |
368 | } | |
369 | if (ret != SSL_ERROR_NONE) | |
370 | { | |
371 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
372 | /* This is not really an error but the only means to | |
373 | for a client to detect whether srp is supported. */ | |
374 | if (al != TLS1_AD_UNKNOWN_PSK_IDENTITY) | |
375 | SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_CLIENTHELLO_TLSEXT); | |
ebba6c48 DSH |
376 | ret = SSL_TLSEXT_ERR_ALERT_FATAL; |
377 | ret= -1; | |
378 | goto end; | |
c79f22c6 | 379 | } |
edc032b5 | 380 | } |
c79f22c6 | 381 | #endif |
58ece833 | 382 | |
44959ee4 | 383 | s->renegotiate = 2; |
d02b48c6 RE |
384 | s->state=SSL3_ST_SW_SRVR_HELLO_A; |
385 | s->init_num=0; | |
386 | break; | |
387 | ||
388 | case SSL3_ST_SW_SRVR_HELLO_A: | |
389 | case SSL3_ST_SW_SRVR_HELLO_B: | |
390 | ret=ssl3_send_server_hello(s); | |
391 | if (ret <= 0) goto end; | |
d26c905c | 392 | #ifndef OPENSSL_NO_TLSEXT |
d02b48c6 | 393 | if (s->hit) |
d26c905c DSH |
394 | { |
395 | if (s->tlsext_ticket_expected) | |
396 | s->state=SSL3_ST_SW_SESSION_TICKET_A; | |
397 | else | |
398 | s->state=SSL3_ST_SW_CHANGE_A; | |
399 | } | |
400 | #else | |
401 | if (s->hit) | |
402 | s->state=SSL3_ST_SW_CHANGE_A; | |
403 | #endif | |
d02b48c6 | 404 | else |
a9e1c50b BL |
405 | #ifndef OPENSSL_NO_TLSEXT |
406 | s->state = SSL3_ST_SW_SUPPLEMENTAL_DATA_A; | |
407 | #else | |
408 | s->state = SSL3_ST_SW_CERT_A; | |
409 | #endif | |
410 | s->init_num = 0; | |
411 | break; | |
412 | ||
413 | #ifndef OPENSSL_NO_TLSEXT | |
414 | case SSL3_ST_SW_SUPPLEMENTAL_DATA_A: | |
415 | case SSL3_ST_SW_SUPPLEMENTAL_DATA_B: | |
416 | /* We promised to send an audit proof in the hello. */ | |
417 | if (s->s3->tlsext_authz_promised_to_client) | |
418 | { | |
419 | ret = tls1_send_server_supplemental_data(s); | |
420 | if (ret <= 0) goto end; | |
421 | } | |
422 | else | |
423 | skip = 1; | |
424 | ||
425 | s->state = SSL3_ST_SW_CERT_A; | |
426 | s->init_num = 0; | |
d02b48c6 | 427 | break; |
a9e1c50b | 428 | #endif |
d02b48c6 RE |
429 | |
430 | case SSL3_ST_SW_CERT_A: | |
431 | case SSL3_ST_SW_CERT_B: | |
cbb92dfa | 432 | /* Check if it is anon DH or anon ECDH, */ |
edc032b5 | 433 | /* normal PSK or KRB5 or SRP */ |
52b8dad8 BM |
434 | if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) |
435 | && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK) | |
436 | && !(s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) | |
d02b48c6 RE |
437 | { |
438 | ret=ssl3_send_server_certificate(s); | |
439 | if (ret <= 0) goto end; | |
67c8e7f4 DSH |
440 | #ifndef OPENSSL_NO_TLSEXT |
441 | if (s->tlsext_status_expected) | |
442 | s->state=SSL3_ST_SW_CERT_STATUS_A; | |
443 | else | |
444 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
d02b48c6 | 445 | } |
67c8e7f4 DSH |
446 | else |
447 | { | |
448 | skip = 1; | |
449 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
450 | } | |
451 | #else | |
3ce54f35 | 452 | } |
d02b48c6 RE |
453 | else |
454 | skip=1; | |
67c8e7f4 | 455 | |
d02b48c6 | 456 | s->state=SSL3_ST_SW_KEY_EXCH_A; |
67c8e7f4 | 457 | #endif |
d02b48c6 RE |
458 | s->init_num=0; |
459 | break; | |
460 | ||
461 | case SSL3_ST_SW_KEY_EXCH_A: | |
462 | case SSL3_ST_SW_KEY_EXCH_B: | |
52b8dad8 | 463 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
d02b48c6 RE |
464 | |
465 | /* clear this, it may get reset by | |
466 | * send_server_key_exchange */ | |
f9b3bff6 | 467 | if ((s->options & SSL_OP_EPHEMERAL_RSA) |
bc36ee62 | 468 | #ifndef OPENSSL_NO_KRB5 |
52b8dad8 | 469 | && !(alg_k & SSL_kKRB5) |
bc36ee62 | 470 | #endif /* OPENSSL_NO_KRB5 */ |
f9b3bff6 | 471 | ) |
7bc03ded BM |
472 | /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key |
473 | * even when forbidden by protocol specs | |
474 | * (handshake may fail as clients are not required to | |
475 | * be able to handle this) */ | |
d02b48c6 RE |
476 | s->s3->tmp.use_rsa_tmp=1; |
477 | else | |
478 | s->s3->tmp.use_rsa_tmp=0; | |
479 | ||
ea262260 | 480 | |
d02b48c6 | 481 | /* only send if a DH key exchange, fortezza or |
ea262260 BM |
482 | * RSA but we have a sign only certificate |
483 | * | |
ddac1974 NL |
484 | * PSK: may send PSK identity hints |
485 | * | |
ea262260 BM |
486 | * For ECC ciphersuites, we send a serverKeyExchange |
487 | * message only if the cipher suite is either | |
488 | * ECDH-anon or ECDHE. In other cases, the | |
89bbe14c | 489 | * server certificate contains the server's |
ea262260 BM |
490 | * public key for key exchange. |
491 | */ | |
06ab81f9 | 492 | if (s->s3->tmp.use_rsa_tmp |
ddac1974 NL |
493 | /* PSK: send ServerKeyExchange if PSK identity |
494 | * hint if provided */ | |
495 | #ifndef OPENSSL_NO_PSK | |
52b8dad8 | 496 | || ((alg_k & SSL_kPSK) && s->ctx->psk_identity_hint) |
edc032b5 BL |
497 | #endif |
498 | #ifndef OPENSSL_NO_SRP | |
499 | /* SRP: send ServerKeyExchange */ | |
500 | || (alg_k & SSL_kSRP) | |
ddac1974 | 501 | #endif |
8e1dc4d7 | 502 | || (alg_k & SSL_kEDH) |
52b8dad8 BM |
503 | || (alg_k & SSL_kEECDH) |
504 | || ((alg_k & SSL_kRSA) | |
b56bce4f | 505 | && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL |
018e57c7 DSH |
506 | || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) |
507 | && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher) | |
06ab81f9 BL |
508 | ) |
509 | ) | |
510 | ) | |
d02b48c6 | 511 | ) |
d02b48c6 RE |
512 | { |
513 | ret=ssl3_send_server_key_exchange(s); | |
514 | if (ret <= 0) goto end; | |
515 | } | |
516 | else | |
517 | skip=1; | |
518 | ||
519 | s->state=SSL3_ST_SW_CERT_REQ_A; | |
520 | s->init_num=0; | |
521 | break; | |
522 | ||
523 | case SSL3_ST_SW_CERT_REQ_A: | |
524 | case SSL3_ST_SW_CERT_REQ_B: | |
47134b78 BM |
525 | if (/* don't request cert unless asked for it: */ |
526 | !(s->verify_mode & SSL_VERIFY_PEER) || | |
527 | /* if SSL_VERIFY_CLIENT_ONCE is set, | |
528 | * don't request cert during re-negotiation: */ | |
d02b48c6 | 529 | ((s->session->peer != NULL) && |
47134b78 BM |
530 | (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) || |
531 | /* never request cert in anonymous ciphersuites | |
532 | * (see section "Certificate request" in SSL 3 drafts | |
533 | * and in RFC 2246): */ | |
52b8dad8 | 534 | ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && |
47134b78 BM |
535 | /* ... except when the application insists on verification |
536 | * (against the specs, but s3_clnt.c accepts this for SSL 3) */ | |
45442167 | 537 | !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) || |
52b8dad8 BM |
538 | /* never request cert in Kerberos ciphersuites */ |
539 | (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) | |
ddac1974 NL |
540 | /* With normal PSK Certificates and |
541 | * Certificate Requests are omitted */ | |
52b8dad8 | 542 | || (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) |
d02b48c6 RE |
543 | { |
544 | /* no cert request */ | |
545 | skip=1; | |
58964a49 | 546 | s->s3->tmp.cert_request=0; |
d02b48c6 | 547 | s->state=SSL3_ST_SW_SRVR_DONE_A; |
f37f20ff DSH |
548 | if (s->s3->handshake_buffer) |
549 | if (!ssl3_digest_cached_records(s)) | |
550 | return -1; | |
d02b48c6 RE |
551 | } |
552 | else | |
553 | { | |
58964a49 | 554 | s->s3->tmp.cert_request=1; |
d02b48c6 RE |
555 | ret=ssl3_send_certificate_request(s); |
556 | if (ret <= 0) goto end; | |
de469ef2 | 557 | #ifndef NETSCAPE_HANG_BUG |
d02b48c6 | 558 | s->state=SSL3_ST_SW_SRVR_DONE_A; |
de469ef2 DSH |
559 | #else |
560 | s->state=SSL3_ST_SW_FLUSH; | |
561 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
562 | #endif | |
d02b48c6 RE |
563 | s->init_num=0; |
564 | } | |
565 | break; | |
566 | ||
567 | case SSL3_ST_SW_SRVR_DONE_A: | |
568 | case SSL3_ST_SW_SRVR_DONE_B: | |
569 | ret=ssl3_send_server_done(s); | |
570 | if (ret <= 0) goto end; | |
571 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
572 | s->state=SSL3_ST_SW_FLUSH; | |
573 | s->init_num=0; | |
574 | break; | |
575 | ||
576 | case SSL3_ST_SW_FLUSH: | |
d5e7f2f2 DSH |
577 | |
578 | /* This code originally checked to see if | |
579 | * any data was pending using BIO_CTRL_INFO | |
580 | * and then flushed. This caused problems | |
581 | * as documented in PR#1939. The proposed | |
582 | * fix doesn't completely resolve this issue | |
583 | * as buggy implementations of BIO_CTRL_PENDING | |
584 | * still exist. So instead we just flush | |
585 | * unconditionally. | |
21a5c040 DSH |
586 | */ |
587 | ||
d5e7f2f2 DSH |
588 | s->rwstate=SSL_WRITING; |
589 | if (BIO_flush(s->wbio) <= 0) | |
d02b48c6 | 590 | { |
d5e7f2f2 DSH |
591 | ret= -1; |
592 | goto end; | |
d02b48c6 | 593 | } |
d5e7f2f2 | 594 | s->rwstate=SSL_NOTHING; |
d02b48c6 RE |
595 | |
596 | s->state=s->s3->tmp.next_state; | |
597 | break; | |
598 | ||
599 | case SSL3_ST_SR_CERT_A: | |
600 | case SSL3_ST_SR_CERT_B: | |
745c70e5 | 601 | /* Check for second client hello (MS SGC) */ |
3d14b9d0 | 602 | ret = ssl3_check_client_hello(s); |
745c70e5 BM |
603 | if (ret <= 0) |
604 | goto end; | |
605 | if (ret == 2) | |
606 | s->state = SSL3_ST_SR_CLNT_HELLO_C; | |
3d14b9d0 | 607 | else { |
14f3d7c5 DSH |
608 | if (s->s3->tmp.cert_request) |
609 | { | |
610 | ret=ssl3_get_client_certificate(s); | |
611 | if (ret <= 0) goto end; | |
612 | } | |
3d14b9d0 DSH |
613 | s->init_num=0; |
614 | s->state=SSL3_ST_SR_KEY_EXCH_A; | |
615 | } | |
d02b48c6 RE |
616 | break; |
617 | ||
618 | case SSL3_ST_SR_KEY_EXCH_A: | |
619 | case SSL3_ST_SR_KEY_EXCH_B: | |
620 | ret=ssl3_get_client_key_exchange(s); | |
89bbe14c | 621 | if (ret <= 0) |
ea262260 BM |
622 | goto end; |
623 | if (ret == 2) | |
624 | { | |
625 | /* For the ECDH ciphersuites when | |
626 | * the client sends its ECDH pub key in | |
627 | * a certificate, the CertificateVerify | |
628 | * message is not sent. | |
f0288f05 DSH |
629 | * Also for GOST ciphersuites when |
630 | * the client uses its key from the certificate | |
631 | * for key exchange. | |
ea262260 | 632 | */ |
bf48836c | 633 | #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) |
ea262260 | 634 | s->state=SSL3_ST_SR_FINISHED_A; |
ee2ffc27 BL |
635 | #else |
636 | if (s->s3->next_proto_neg_seen) | |
637 | s->state=SSL3_ST_SR_NEXT_PROTO_A; | |
638 | else | |
639 | s->state=SSL3_ST_SR_FINISHED_A; | |
640 | #endif | |
ea262260 BM |
641 | s->init_num = 0; |
642 | } | |
238b6361 | 643 | else if (TLS1_get_version(s) >= TLS1_2_VERSION) |
f37f20ff DSH |
644 | { |
645 | s->state=SSL3_ST_SR_CERT_VRFY_A; | |
646 | s->init_num=0; | |
647 | if (!s->session->peer) | |
648 | break; | |
649 | /* For TLS v1.2 freeze the handshake buffer | |
650 | * at this point and digest cached records. | |
651 | */ | |
652 | if (!s->s3->handshake_buffer) | |
653 | { | |
654 | SSLerr(SSL_F_SSL3_ACCEPT,ERR_R_INTERNAL_ERROR); | |
655 | return -1; | |
656 | } | |
657 | s->s3->flags |= TLS1_FLAGS_KEEP_HANDSHAKE; | |
658 | if (!ssl3_digest_cached_records(s)) | |
659 | return -1; | |
660 | } | |
89bbe14c | 661 | else |
ea262260 | 662 | { |
0e1dba93 DSH |
663 | int offset=0; |
664 | int dgst_num; | |
0eab41fb | 665 | |
ea262260 BM |
666 | s->state=SSL3_ST_SR_CERT_VRFY_A; |
667 | s->init_num=0; | |
d02b48c6 | 668 | |
ea262260 BM |
669 | /* We need to get hashes here so if there is |
670 | * a client cert, it can be verified | |
81025661 DSH |
671 | * FIXME - digest processing for CertificateVerify |
672 | * should be generalized. But it is next step | |
89bbe14c | 673 | */ |
0e1dba93 | 674 | if (s->s3->handshake_buffer) |
6ba71a71 BL |
675 | if (!ssl3_digest_cached_records(s)) |
676 | return -1; | |
0e1dba93 DSH |
677 | for (dgst_num=0; dgst_num<SSL_MAX_DIGEST;dgst_num++) |
678 | if (s->s3->handshake_dgst[dgst_num]) | |
679 | { | |
0eab41fb BL |
680 | int dgst_size; |
681 | ||
0e1dba93 | 682 | 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 |
683 | dgst_size=EVP_MD_CTX_size(s->s3->handshake_dgst[dgst_num]); |
684 | if (dgst_size < 0) | |
685 | { | |
686 | ret = -1; | |
687 | goto end; | |
688 | } | |
689 | offset+=dgst_size; | |
0e1dba93 | 690 | } |
ea262260 | 691 | } |
d02b48c6 RE |
692 | break; |
693 | ||
694 | case SSL3_ST_SR_CERT_VRFY_A: | |
695 | case SSL3_ST_SR_CERT_VRFY_B: | |
696 | ||
697 | /* we should decide if we expected this one */ | |
698 | ret=ssl3_get_cert_verify(s); | |
699 | if (ret <= 0) goto end; | |
700 | ||
bf48836c | 701 | #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) |
d02b48c6 | 702 | s->state=SSL3_ST_SR_FINISHED_A; |
ee2ffc27 BL |
703 | #else |
704 | if (s->s3->next_proto_neg_seen) | |
705 | s->state=SSL3_ST_SR_NEXT_PROTO_A; | |
706 | else | |
707 | s->state=SSL3_ST_SR_FINISHED_A; | |
708 | #endif | |
d02b48c6 RE |
709 | s->init_num=0; |
710 | break; | |
711 | ||
bf48836c | 712 | #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) |
ee2ffc27 BL |
713 | case SSL3_ST_SR_NEXT_PROTO_A: |
714 | case SSL3_ST_SR_NEXT_PROTO_B: | |
715 | ret=ssl3_get_next_proto(s); | |
716 | if (ret <= 0) goto end; | |
717 | s->init_num = 0; | |
718 | s->state=SSL3_ST_SR_FINISHED_A; | |
719 | break; | |
720 | #endif | |
721 | ||
d02b48c6 RE |
722 | case SSL3_ST_SR_FINISHED_A: |
723 | case SSL3_ST_SR_FINISHED_B: | |
724 | ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A, | |
58964a49 | 725 | SSL3_ST_SR_FINISHED_B); |
d02b48c6 | 726 | if (ret <= 0) goto end; |
d26c905c DSH |
727 | if (s->hit) |
728 | s->state=SSL_ST_OK; | |
c519e89f BM |
729 | #ifndef OPENSSL_NO_TLSEXT |
730 | else if (s->tlsext_ticket_expected) | |
731 | s->state=SSL3_ST_SW_SESSION_TICKET_A; | |
6434abbf | 732 | #endif |
d02b48c6 RE |
733 | else |
734 | s->state=SSL3_ST_SW_CHANGE_A; | |
735 | s->init_num=0; | |
736 | break; | |
737 | ||
6434abbf DSH |
738 | #ifndef OPENSSL_NO_TLSEXT |
739 | case SSL3_ST_SW_SESSION_TICKET_A: | |
740 | case SSL3_ST_SW_SESSION_TICKET_B: | |
741 | ret=ssl3_send_newsession_ticket(s); | |
742 | if (ret <= 0) goto end; | |
743 | s->state=SSL3_ST_SW_CHANGE_A; | |
744 | s->init_num=0; | |
745 | break; | |
746 | ||
67c8e7f4 DSH |
747 | case SSL3_ST_SW_CERT_STATUS_A: |
748 | case SSL3_ST_SW_CERT_STATUS_B: | |
749 | ret=ssl3_send_cert_status(s); | |
750 | if (ret <= 0) goto end; | |
751 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
752 | s->init_num=0; | |
753 | break; | |
754 | ||
6434abbf DSH |
755 | #endif |
756 | ||
d02b48c6 RE |
757 | case SSL3_ST_SW_CHANGE_A: |
758 | case SSL3_ST_SW_CHANGE_B: | |
759 | ||
760 | s->session->cipher=s->s3->tmp.new_cipher; | |
58964a49 RE |
761 | if (!s->method->ssl3_enc->setup_key_block(s)) |
762 | { ret= -1; goto end; } | |
d02b48c6 RE |
763 | |
764 | ret=ssl3_send_change_cipher_spec(s, | |
765 | SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B); | |
766 | ||
767 | if (ret <= 0) goto end; | |
768 | s->state=SSL3_ST_SW_FINISHED_A; | |
769 | s->init_num=0; | |
770 | ||
58964a49 | 771 | if (!s->method->ssl3_enc->change_cipher_state(s, |
d02b48c6 RE |
772 | SSL3_CHANGE_CIPHER_SERVER_WRITE)) |
773 | { | |
774 | ret= -1; | |
775 | goto end; | |
776 | } | |
777 | ||
778 | break; | |
779 | ||
780 | case SSL3_ST_SW_FINISHED_A: | |
781 | case SSL3_ST_SW_FINISHED_B: | |
782 | ret=ssl3_send_finished(s, | |
783 | SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B, | |
c44f7540 BM |
784 | s->method->ssl3_enc->server_finished_label, |
785 | s->method->ssl3_enc->server_finished_label_len); | |
d02b48c6 RE |
786 | if (ret <= 0) goto end; |
787 | s->state=SSL3_ST_SW_FLUSH; | |
788 | if (s->hit) | |
ee2ffc27 | 789 | { |
bf48836c | 790 | #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) |
d02b48c6 | 791 | s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; |
ee2ffc27 BL |
792 | #else |
793 | if (s->s3->next_proto_neg_seen) | |
794 | s->s3->tmp.next_state=SSL3_ST_SR_NEXT_PROTO_A; | |
795 | else | |
796 | s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; | |
797 | #endif | |
798 | } | |
d02b48c6 RE |
799 | else |
800 | s->s3->tmp.next_state=SSL_ST_OK; | |
801 | s->init_num=0; | |
802 | break; | |
803 | ||
804 | case SSL_ST_OK: | |
805 | /* clean a few things up */ | |
806 | ssl3_cleanup_key_block(s); | |
807 | ||
808 | BUF_MEM_free(s->init_buf); | |
809 | s->init_buf=NULL; | |
810 | ||
811 | /* remove buffering on output */ | |
413c4f45 | 812 | ssl_free_wbio_buffer(s); |
d02b48c6 | 813 | |
d02b48c6 RE |
814 | s->init_num=0; |
815 | ||
44959ee4 | 816 | if (s->renegotiate == 2) /* skipped if we just sent a HelloRequest */ |
b49124f6 | 817 | { |
44959ee4 | 818 | s->renegotiate=0; |
b49124f6 BM |
819 | s->new_session=0; |
820 | ||
821 | ssl_update_cache(s,SSL_SESS_CACHE_SERVER); | |
822 | ||
823 | s->ctx->stats.sess_accept_good++; | |
824 | /* s->server=1; */ | |
825 | s->handshake_func=ssl3_accept; | |
d02b48c6 | 826 | |
b49124f6 BM |
827 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); |
828 | } | |
829 | ||
681bfae4 | 830 | ret = 1; |
d02b48c6 | 831 | goto end; |
58964a49 | 832 | /* break; */ |
d02b48c6 RE |
833 | |
834 | default: | |
835 | SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE); | |
836 | ret= -1; | |
837 | goto end; | |
58964a49 | 838 | /* break; */ |
d02b48c6 RE |
839 | } |
840 | ||
841 | if (!s->s3->tmp.reuse_message && !skip) | |
842 | { | |
58964a49 RE |
843 | if (s->debug) |
844 | { | |
845 | if ((ret=BIO_flush(s->wbio)) <= 0) | |
846 | goto end; | |
847 | } | |
848 | ||
d02b48c6 RE |
849 | |
850 | if ((cb != NULL) && (s->state != state)) | |
851 | { | |
852 | new_state=s->state; | |
853 | s->state=state; | |
854 | cb(s,SSL_CB_ACCEPT_LOOP,1); | |
855 | s->state=new_state; | |
856 | } | |
857 | } | |
858 | skip=0; | |
859 | } | |
860 | end: | |
861 | /* BIO_flush(s->wbio); */ | |
862 | ||
4d635a70 | 863 | s->in_handshake--; |
d02b48c6 RE |
864 | if (cb != NULL) |
865 | cb(s,SSL_CB_ACCEPT_EXIT,ret); | |
d02b48c6 RE |
866 | return(ret); |
867 | } | |
868 | ||
36d16f8e | 869 | int ssl3_send_hello_request(SSL *s) |
d02b48c6 RE |
870 | { |
871 | unsigned char *p; | |
872 | ||
873 | if (s->state == SSL3_ST_SW_HELLO_REQ_A) | |
874 | { | |
875 | p=(unsigned char *)s->init_buf->data; | |
c51ae173 | 876 | *(p++)=SSL3_MT_HELLO_REQUEST; |
d02b48c6 RE |
877 | *(p++)=0; |
878 | *(p++)=0; | |
879 | *(p++)=0; | |
880 | ||
881 | s->state=SSL3_ST_SW_HELLO_REQ_B; | |
882 | /* number of bytes to write */ | |
883 | s->init_num=4; | |
884 | s->init_off=0; | |
885 | } | |
886 | ||
887 | /* SSL3_ST_SW_HELLO_REQ_B */ | |
888 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
889 | } | |
890 | ||
36d16f8e | 891 | int ssl3_check_client_hello(SSL *s) |
3d14b9d0 DSH |
892 | { |
893 | int ok; | |
894 | long n; | |
895 | ||
b78e5021 BM |
896 | /* this function is called when we really expect a Certificate message, |
897 | * so permit appropriate message length */ | |
36d16f8e | 898 | n=s->method->ssl_get_message(s, |
3d14b9d0 DSH |
899 | SSL3_ST_SR_CERT_A, |
900 | SSL3_ST_SR_CERT_B, | |
901 | -1, | |
c0f5dd07 | 902 | s->max_cert_list, |
3d14b9d0 DSH |
903 | &ok); |
904 | if (!ok) return((int)n); | |
905 | s->s3->tmp.reuse_message = 1; | |
a2a01589 BM |
906 | if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO) |
907 | { | |
206310c3 DSH |
908 | /* We only allow the client to restart the handshake once per |
909 | * negotiation. */ | |
910 | if (s->s3->flags & SSL3_FLAGS_SGC_RESTART_DONE) | |
911 | { | |
912 | SSLerr(SSL_F_SSL3_CHECK_CLIENT_HELLO, SSL_R_MULTIPLE_SGC_RESTARTS); | |
913 | return -1; | |
914 | } | |
a2a01589 | 915 | /* Throw away what we have done so far in the current handshake, |
e7928282 | 916 | * which will now be aborted. (A full SSL_clear would be too much.) */ |
bc36ee62 | 917 | #ifndef OPENSSL_NO_DH |
a2a01589 BM |
918 | if (s->s3->tmp.dh != NULL) |
919 | { | |
920 | DH_free(s->s3->tmp.dh); | |
921 | s->s3->tmp.dh = NULL; | |
922 | } | |
e7928282 BM |
923 | #endif |
924 | #ifndef OPENSSL_NO_ECDH | |
925 | if (s->s3->tmp.ecdh != NULL) | |
926 | { | |
927 | EC_KEY_free(s->s3->tmp.ecdh); | |
928 | s->s3->tmp.ecdh = NULL; | |
929 | } | |
a2a01589 | 930 | #endif |
d0dc991c | 931 | s->s3->flags |= SSL3_FLAGS_SGC_RESTART_DONE; |
a2a01589 BM |
932 | return 2; |
933 | } | |
3d14b9d0 DSH |
934 | return 1; |
935 | } | |
936 | ||
36d16f8e | 937 | int ssl3_get_client_hello(SSL *s) |
d02b48c6 | 938 | { |
09e4e4b9 | 939 | int i,j,ok,al=SSL_AD_INTERNAL_ERROR,ret= -1; |
6c61726b | 940 | unsigned int cookie_len; |
d02b48c6 RE |
941 | long n; |
942 | unsigned long id; | |
413c4f45 | 943 | unsigned char *p,*d,*q; |
d02b48c6 | 944 | SSL_CIPHER *c; |
09b6c2ef | 945 | #ifndef OPENSSL_NO_COMP |
413c4f45 | 946 | SSL_COMP *comp=NULL; |
09b6c2ef | 947 | #endif |
f73e07cf | 948 | STACK_OF(SSL_CIPHER) *ciphers=NULL; |
d02b48c6 | 949 | |
58964a49 RE |
950 | /* We do this so that we will respond with our native type. |
951 | * If we are TLSv1 and we get SSLv3, we will respond with TLSv1, | |
952 | * This down switching should be handled by a different method. | |
953 | * If we are SSLv3, we will respond with SSLv3, even if prompted with | |
954 | * TLSv1. | |
955 | */ | |
edc032b5 | 956 | if (s->state == SSL3_ST_SR_CLNT_HELLO_A |
edc032b5 | 957 | ) |
d02b48c6 | 958 | { |
d02b48c6 RE |
959 | s->state=SSL3_ST_SR_CLNT_HELLO_B; |
960 | } | |
1e24b3a0 | 961 | s->first_packet=1; |
36d16f8e | 962 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
963 | SSL3_ST_SR_CLNT_HELLO_B, |
964 | SSL3_ST_SR_CLNT_HELLO_C, | |
965 | SSL3_MT_CLIENT_HELLO, | |
966 | SSL3_RT_MAX_PLAIN_LENGTH, | |
967 | &ok); | |
968 | ||
969 | if (!ok) return((int)n); | |
1e24b3a0 | 970 | s->first_packet=0; |
48948d53 | 971 | d=p=(unsigned char *)s->init_msg; |
d02b48c6 | 972 | |
074309b7 BM |
973 | /* use version from inside client hello, not from record header |
974 | * (may differ: see RFC 2246, Appendix E, second paragraph) */ | |
975 | s->client_version=(((int)p[0])<<8)|(int)p[1]; | |
d02b48c6 RE |
976 | p+=2; |
977 | ||
7432d073 AP |
978 | if ((s->version == DTLS1_VERSION && s->client_version > s->version) || |
979 | (s->version != DTLS1_VERSION && s->client_version < s->version)) | |
a661b653 BM |
980 | { |
981 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER); | |
89bbe14c | 982 | if ((s->client_version>>8) == SSL3_VERSION_MAJOR) |
a661b653 BM |
983 | { |
984 | /* similar to ssl3_get_record, send alert using remote version number */ | |
985 | s->version = s->client_version; | |
986 | } | |
987 | al = SSL_AD_PROTOCOL_VERSION; | |
988 | goto f_err; | |
989 | } | |
990 | ||
07a9d1a2 DSH |
991 | /* If we require cookies and this ClientHello doesn't |
992 | * contain one, just return since we do not want to | |
993 | * allocate any memory yet. So check cookie length... | |
994 | */ | |
995 | if (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) | |
996 | { | |
997 | unsigned int session_length, cookie_length; | |
998 | ||
999 | session_length = *(p + SSL3_RANDOM_SIZE); | |
1000 | cookie_length = *(p + SSL3_RANDOM_SIZE + session_length + 1); | |
1001 | ||
14b148d3 | 1002 | if (cookie_length == 0) |
07a9d1a2 DSH |
1003 | return 1; |
1004 | } | |
1005 | ||
d02b48c6 RE |
1006 | /* load the client random */ |
1007 | memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE); | |
1008 | p+=SSL3_RANDOM_SIZE; | |
1009 | ||
1010 | /* get the session-id */ | |
1011 | j= *(p++); | |
1012 | ||
1013 | s->hit=0; | |
c519e89f BM |
1014 | /* Versions before 0.9.7 always allow clients to resume sessions in renegotiation. |
1015 | * 0.9.7 and later allow this by default, but optionally ignore resumption requests | |
1016 | * with flag SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION (it's a new flag rather | |
1017 | * than a change to default behavior so that applications relying on this for security | |
1018 | * won't even compile against older library versions). | |
1019 | * | |
1020 | * 1.0.1 and later also have a function SSL_renegotiate_abbreviated() to request | |
1021 | * renegotiation but not a new session (s->new_session remains unset): for servers, | |
1022 | * this essentially just means that the SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION | |
1023 | * setting will be ignored. | |
6b0e9fac | 1024 | */ |
6434abbf | 1025 | if ((s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION))) |
d02b48c6 RE |
1026 | { |
1027 | if (!ssl_get_new_session(s,1)) | |
1028 | goto err; | |
1029 | } | |
1030 | else | |
1031 | { | |
6434abbf | 1032 | i=ssl_get_prev_session(s, p, j, d + n); |
d02b48c6 RE |
1033 | if (i == 1) |
1034 | { /* previous session */ | |
1035 | s->hit=1; | |
1036 | } | |
8876bc05 BM |
1037 | else if (i == -1) |
1038 | goto err; | |
1039 | else /* i == 0 */ | |
d02b48c6 RE |
1040 | { |
1041 | if (!ssl_get_new_session(s,1)) | |
1042 | goto err; | |
1043 | } | |
1044 | } | |
1045 | ||
1046 | p+=j; | |
36d16f8e | 1047 | |
07a9d1a2 | 1048 | if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER) |
36d16f8e BL |
1049 | { |
1050 | /* cookie stuff */ | |
1051 | cookie_len = *(p++); | |
1052 | ||
beb056b3 BM |
1053 | /* |
1054 | * The ClientHello may contain a cookie even if the | |
1055 | * HelloVerify message has not been sent--make sure that it | |
1056 | * does not cause an overflow. | |
1057 | */ | |
36d16f8e BL |
1058 | if ( cookie_len > sizeof(s->d1->rcvd_cookie)) |
1059 | { | |
1060 | /* too much data */ | |
beb056b3 | 1061 | al = SSL_AD_DECODE_ERROR; |
36d16f8e BL |
1062 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH); |
1063 | goto f_err; | |
1064 | } | |
1065 | ||
beb056b3 | 1066 | /* verify the cookie if appropriate option is set. */ |
07a9d1a2 | 1067 | if ((SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) && |
beb056b3 BM |
1068 | cookie_len > 0) |
1069 | { | |
1070 | memcpy(s->d1->rcvd_cookie, p, cookie_len); | |
1071 | ||
1072 | if ( s->ctx->app_verify_cookie_cb != NULL) | |
1073 | { | |
1074 | if ( s->ctx->app_verify_cookie_cb(s, s->d1->rcvd_cookie, | |
1075 | cookie_len) == 0) | |
1076 | { | |
1077 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1078 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, | |
1079 | SSL_R_COOKIE_MISMATCH); | |
1080 | goto f_err; | |
1081 | } | |
1082 | /* else cookie verification succeeded */ | |
1083 | } | |
1084 | else if ( memcmp(s->d1->rcvd_cookie, s->d1->cookie, | |
1085 | s->d1->cookie_len) != 0) /* default verification */ | |
1086 | { | |
1087 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1088 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, | |
1089 | SSL_R_COOKIE_MISMATCH); | |
1090 | goto f_err; | |
1091 | } | |
07a9d1a2 DSH |
1092 | |
1093 | ret = 2; | |
beb056b3 BM |
1094 | } |
1095 | ||
1096 | p += cookie_len; | |
36d16f8e BL |
1097 | } |
1098 | ||
d02b48c6 RE |
1099 | n2s(p,i); |
1100 | if ((i == 0) && (j != 0)) | |
1101 | { | |
1102 | /* we need a cipher if we are not resuming a session */ | |
58964a49 | 1103 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
1104 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED); |
1105 | goto f_err; | |
1106 | } | |
82b0bf0b | 1107 | if ((p+i) >= (d+n)) |
d02b48c6 RE |
1108 | { |
1109 | /* not enough data */ | |
58964a49 | 1110 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1111 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); |
1112 | goto f_err; | |
1113 | } | |
1114 | if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers)) | |
1115 | == NULL)) | |
1116 | { | |
1117 | goto err; | |
1118 | } | |
1119 | p+=i; | |
1120 | ||
1121 | /* If it is a hit, check that the cipher is in the list */ | |
1122 | if ((s->hit) && (i > 0)) | |
1123 | { | |
1124 | j=0; | |
1125 | id=s->session->cipher->id; | |
1126 | ||
413c4f45 MC |
1127 | #ifdef CIPHER_DEBUG |
1128 | printf("client sent %d ciphers\n",sk_num(ciphers)); | |
1129 | #endif | |
f73e07cf | 1130 | for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++) |
d02b48c6 | 1131 | { |
f73e07cf | 1132 | c=sk_SSL_CIPHER_value(ciphers,i); |
413c4f45 MC |
1133 | #ifdef CIPHER_DEBUG |
1134 | printf("client [%2d of %2d]:%s\n", | |
1135 | i,sk_num(ciphers),SSL_CIPHER_get_name(c)); | |
1136 | #endif | |
d02b48c6 RE |
1137 | if (c->id == id) |
1138 | { | |
1139 | j=1; | |
1140 | break; | |
1141 | } | |
1142 | } | |
88f2a4cf BM |
1143 | /* Disabled because it can be used in a ciphersuite downgrade |
1144 | * attack: CVE-2010-4180. | |
1145 | */ | |
1146 | #if 0 | |
837f2fc7 | 1147 | if (j == 0 && (s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1)) |
d02b48c6 | 1148 | { |
837f2fc7 BM |
1149 | /* Special case as client bug workaround: the previously used cipher may |
1150 | * not be in the current list, the client instead might be trying to | |
1151 | * continue using a cipher that before wasn't chosen due to server | |
1152 | * preferences. We'll have to reject the connection if the cipher is not | |
1153 | * enabled, though. */ | |
1154 | c = sk_SSL_CIPHER_value(ciphers, 0); | |
1155 | if (sk_SSL_CIPHER_find(SSL_get_ciphers(s), c) >= 0) | |
d02b48c6 | 1156 | { |
837f2fc7 BM |
1157 | s->session->cipher = c; |
1158 | j = 1; | |
d02b48c6 RE |
1159 | } |
1160 | } | |
88f2a4cf | 1161 | #endif |
837f2fc7 BM |
1162 | if (j == 0) |
1163 | { | |
1164 | /* we need to have the cipher in the cipher | |
1165 | * list if we are asked to reuse it */ | |
1166 | al=SSL_AD_ILLEGAL_PARAMETER; | |
1167 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING); | |
1168 | goto f_err; | |
1169 | } | |
d02b48c6 RE |
1170 | } |
1171 | ||
1172 | /* compression */ | |
1173 | i= *(p++); | |
82b0bf0b BM |
1174 | if ((p+i) > (d+n)) |
1175 | { | |
1176 | /* not enough data */ | |
1177 | al=SSL_AD_DECODE_ERROR; | |
1178 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); | |
1179 | goto f_err; | |
1180 | } | |
413c4f45 | 1181 | q=p; |
d02b48c6 | 1182 | for (j=0; j<i; j++) |
413c4f45 | 1183 | { |
d02b48c6 | 1184 | if (p[j] == 0) break; |
413c4f45 | 1185 | } |
d02b48c6 RE |
1186 | |
1187 | p+=i; | |
1188 | if (j >= i) | |
1189 | { | |
1190 | /* no compress */ | |
58964a49 | 1191 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1192 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED); |
1193 | goto f_err; | |
1194 | } | |
1195 | ||
58ece833 BM |
1196 | #ifndef OPENSSL_NO_TLSEXT |
1197 | /* TLS extensions*/ | |
13f6d57b | 1198 | if (s->version >= SSL3_VERSION) |
58ece833 | 1199 | { |
b2284ed3 | 1200 | if (!ssl_parse_clienthello_tlsext(s,&p,d,n)) |
58ece833 | 1201 | { |
36ca4ba6 | 1202 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_PARSE_TLSEXT); |
58ece833 | 1203 | goto err; |
b2284ed3 | 1204 | } |
58ece833 | 1205 | } |
12bf56c0 DSH |
1206 | |
1207 | /* Check if we want to use external pre-shared secret for this | |
1208 | * handshake for not reused session only. We need to generate | |
1209 | * server_random before calling tls_session_secret_cb in order to allow | |
1210 | * SessionTicket processing to use it in key derivation. */ | |
1211 | { | |
1212 | unsigned long Time; | |
1213 | unsigned char *pos; | |
1214 | Time=(unsigned long)time(NULL); /* Time */ | |
1215 | pos=s->s3->server_random; | |
1216 | l2n(Time,pos); | |
1217 | if (RAND_pseudo_bytes(pos,SSL3_RANDOM_SIZE-4) <= 0) | |
1218 | { | |
12bf56c0 DSH |
1219 | goto f_err; |
1220 | } | |
1221 | } | |
1222 | ||
1223 | if (!s->hit && s->version >= TLS1_VERSION && s->tls_session_secret_cb) | |
1224 | { | |
1225 | SSL_CIPHER *pref_cipher=NULL; | |
1226 | ||
1227 | s->session->master_key_length=sizeof(s->session->master_key); | |
1228 | if(s->tls_session_secret_cb(s, s->session->master_key, &s->session->master_key_length, | |
1229 | ciphers, &pref_cipher, s->tls_session_secret_cb_arg)) | |
1230 | { | |
1231 | s->hit=1; | |
1232 | s->session->ciphers=ciphers; | |
1233 | s->session->verify_result=X509_V_OK; | |
1234 | ||
1235 | ciphers=NULL; | |
1236 | ||
1237 | /* check if some cipher was preferred by call back */ | |
1238 | pref_cipher=pref_cipher ? pref_cipher : ssl3_choose_cipher(s, s->session->ciphers, SSL_get_ciphers(s)); | |
1239 | if (pref_cipher == NULL) | |
1240 | { | |
1241 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1242 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER); | |
1243 | goto f_err; | |
1244 | } | |
1245 | ||
1246 | s->session->cipher=pref_cipher; | |
1247 | ||
1248 | if (s->cipher_list) | |
1249 | sk_SSL_CIPHER_free(s->cipher_list); | |
1250 | ||
1251 | if (s->cipher_list_by_id) | |
1252 | sk_SSL_CIPHER_free(s->cipher_list_by_id); | |
1253 | ||
1254 | s->cipher_list = sk_SSL_CIPHER_dup(s->session->ciphers); | |
1255 | s->cipher_list_by_id = sk_SSL_CIPHER_dup(s->session->ciphers); | |
1256 | } | |
1257 | } | |
58ece833 BM |
1258 | #endif |
1259 | ||
413c4f45 MC |
1260 | /* Worst case, we will use the NULL compression, but if we have other |
1261 | * options, we will now look for them. We have i-1 compression | |
1262 | * algorithms from the client, starting at q. */ | |
1263 | s->s3->tmp.new_compression=NULL; | |
09b6c2ef | 1264 | #ifndef OPENSSL_NO_COMP |
e6f418bc DSH |
1265 | /* This only happens if we have a cache hit */ |
1266 | if (s->session->compress_meth != 0) | |
1267 | { | |
1268 | int m, comp_id = s->session->compress_meth; | |
1269 | /* Perform sanity checks on resumed compression algorithm */ | |
1270 | /* Can't disable compression */ | |
1271 | if (s->options & SSL_OP_NO_COMPRESSION) | |
1272 | { | |
e6f418bc DSH |
1273 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INCONSISTENT_COMPRESSION); |
1274 | goto f_err; | |
1275 | } | |
1276 | /* Look for resumed compression method */ | |
1277 | for (m = 0; m < sk_SSL_COMP_num(s->ctx->comp_methods); m++) | |
1278 | { | |
1279 | comp=sk_SSL_COMP_value(s->ctx->comp_methods,m); | |
1280 | if (comp_id == comp->id) | |
1281 | { | |
1282 | s->s3->tmp.new_compression=comp; | |
1283 | break; | |
1284 | } | |
1285 | } | |
1286 | if (s->s3->tmp.new_compression == NULL) | |
1287 | { | |
e6f418bc DSH |
1288 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INVALID_COMPRESSION_ALGORITHM); |
1289 | goto f_err; | |
1290 | } | |
1291 | /* Look for resumed method in compression list */ | |
1292 | for (m = 0; m < i; m++) | |
1293 | { | |
1294 | if (q[m] == comp_id) | |
1295 | break; | |
1296 | } | |
1297 | if (m >= i) | |
1298 | { | |
1299 | al=SSL_AD_ILLEGAL_PARAMETER; | |
1300 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_COMPRESSSION_ALGORITHM_MISSING); | |
1301 | goto f_err; | |
1302 | } | |
1303 | } | |
1304 | else if (s->hit) | |
1305 | comp = NULL; | |
1306 | else if (!(s->options & SSL_OP_NO_COMPRESSION) && s->ctx->comp_methods) | |
413c4f45 MC |
1307 | { /* See if we have a match */ |
1308 | int m,nn,o,v,done=0; | |
1309 | ||
f73e07cf | 1310 | nn=sk_SSL_COMP_num(s->ctx->comp_methods); |
413c4f45 MC |
1311 | for (m=0; m<nn; m++) |
1312 | { | |
f73e07cf | 1313 | comp=sk_SSL_COMP_value(s->ctx->comp_methods,m); |
413c4f45 MC |
1314 | v=comp->id; |
1315 | for (o=0; o<i; o++) | |
1316 | { | |
1317 | if (v == q[o]) | |
1318 | { | |
1319 | done=1; | |
1320 | break; | |
1321 | } | |
1322 | } | |
1323 | if (done) break; | |
1324 | } | |
1325 | if (done) | |
1326 | s->s3->tmp.new_compression=comp; | |
1327 | else | |
1328 | comp=NULL; | |
1329 | } | |
e6f418bc DSH |
1330 | #else |
1331 | /* If compression is disabled we'd better not try to resume a session | |
1332 | * using compression. | |
1333 | */ | |
2be3d6eb | 1334 | if (s->session->compress_meth != 0) |
e6f418bc | 1335 | { |
e6f418bc DSH |
1336 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INCONSISTENT_COMPRESSION); |
1337 | goto f_err; | |
1338 | } | |
09b6c2ef | 1339 | #endif |
413c4f45 | 1340 | |
836f9960 | 1341 | /* Given s->session->ciphers and SSL_get_ciphers, we must |
d02b48c6 RE |
1342 | * pick a cipher */ |
1343 | ||
1344 | if (!s->hit) | |
1345 | { | |
09b6c2ef DSH |
1346 | #ifdef OPENSSL_NO_COMP |
1347 | s->session->compress_meth=0; | |
1348 | #else | |
413c4f45 | 1349 | s->session->compress_meth=(comp == NULL)?0:comp->id; |
09b6c2ef | 1350 | #endif |
d02b48c6 | 1351 | if (s->session->ciphers != NULL) |
f73e07cf | 1352 | sk_SSL_CIPHER_free(s->session->ciphers); |
d02b48c6 RE |
1353 | s->session->ciphers=ciphers; |
1354 | if (ciphers == NULL) | |
1355 | { | |
58964a49 | 1356 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
1357 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED); |
1358 | goto f_err; | |
1359 | } | |
18d71588 DSH |
1360 | /* Let cert callback update server certificates if required */ |
1361 | if (s->cert->cert_cb | |
1362 | && s->cert->cert_cb(s, s->cert->cert_cb_arg) <= 0) | |
1363 | { | |
1364 | al=SSL_AD_INTERNAL_ERROR; | |
1365 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_CERT_CB_ERROR); | |
1366 | goto f_err; | |
1367 | } | |
d02b48c6 RE |
1368 | ciphers=NULL; |
1369 | c=ssl3_choose_cipher(s,s->session->ciphers, | |
836f9960 | 1370 | SSL_get_ciphers(s)); |
d02b48c6 RE |
1371 | |
1372 | if (c == NULL) | |
1373 | { | |
58964a49 | 1374 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1375 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER); |
1376 | goto f_err; | |
1377 | } | |
1378 | s->s3->tmp.new_cipher=c; | |
7c2d4fee BM |
1379 | /* check whether we should disable session resumption */ |
1380 | if (s->not_resumable_session_cb != NULL) | |
1381 | s->session->not_resumable=s->not_resumable_session_cb(s, | |
1382 | ((c->algorithm_mkey & (SSL_kEDH | SSL_kEECDH)) != 0)); | |
1383 | if (s->session->not_resumable) | |
1384 | /* do not send a session ticket */ | |
1385 | s->tlsext_ticket_expected = 0; | |
d02b48c6 RE |
1386 | } |
1387 | else | |
1388 | { | |
1389 | /* Session-id reuse */ | |
1390 | #ifdef REUSE_CIPHER_BUG | |
f73e07cf | 1391 | STACK_OF(SSL_CIPHER) *sk; |
d02b48c6 RE |
1392 | SSL_CIPHER *nc=NULL; |
1393 | SSL_CIPHER *ec=NULL; | |
1394 | ||
58964a49 | 1395 | if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG) |
d02b48c6 RE |
1396 | { |
1397 | sk=s->session->ciphers; | |
f73e07cf | 1398 | for (i=0; i<sk_SSL_CIPHER_num(sk); i++) |
d02b48c6 | 1399 | { |
f73e07cf | 1400 | c=sk_SSL_CIPHER_value(sk,i); |
52b8dad8 | 1401 | if (c->algorithm_enc & SSL_eNULL) |
d02b48c6 | 1402 | nc=c; |
06ab81f9 | 1403 | if (SSL_C_IS_EXPORT(c)) |
d02b48c6 RE |
1404 | ec=c; |
1405 | } | |
1406 | if (nc != NULL) | |
1407 | s->s3->tmp.new_cipher=nc; | |
1408 | else if (ec != NULL) | |
1409 | s->s3->tmp.new_cipher=ec; | |
1410 | else | |
1411 | s->s3->tmp.new_cipher=s->session->cipher; | |
1412 | } | |
1413 | else | |
1414 | #endif | |
1415 | s->s3->tmp.new_cipher=s->session->cipher; | |
1416 | } | |
30551400 | 1417 | |
238b6361 | 1418 | if (TLS1_get_version(s) < TLS1_2_VERSION || !(s->verify_mode & SSL_VERIFY_PEER)) |
f37f20ff DSH |
1419 | { |
1420 | if (!ssl3_digest_cached_records(s)) | |
1421 | goto f_err; | |
1422 | } | |
d02b48c6 RE |
1423 | |
1424 | /* we now have the following setup. | |
1425 | * client_random | |
1426 | * cipher_list - our prefered list of ciphers | |
1427 | * ciphers - the clients prefered list of ciphers | |
1428 | * compression - basically ignored right now | |
1429 | * ssl version is set - sslv3 | |
1430 | * s->session - The ssl session has been setup. | |
657e60fa | 1431 | * s->hit - session reuse flag |
d02b48c6 RE |
1432 | * s->tmp.new_cipher - the new cipher to use. |
1433 | */ | |
1434 | ||
07a9d1a2 | 1435 | if (ret < 0) ret=1; |
d02b48c6 RE |
1436 | if (0) |
1437 | { | |
1438 | f_err: | |
1439 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1440 | } | |
1441 | err: | |
f73e07cf | 1442 | if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers); |
d02b48c6 RE |
1443 | return(ret); |
1444 | } | |
1445 | ||
36d16f8e | 1446 | int ssl3_send_server_hello(SSL *s) |
d02b48c6 RE |
1447 | { |
1448 | unsigned char *buf; | |
1449 | unsigned char *p,*d; | |
1450 | int i,sl; | |
12bf56c0 DSH |
1451 | unsigned long l; |
1452 | #ifdef OPENSSL_NO_TLSEXT | |
1453 | unsigned long Time; | |
1454 | #endif | |
d02b48c6 RE |
1455 | |
1456 | if (s->state == SSL3_ST_SW_SRVR_HELLO_A) | |
1457 | { | |
1458 | buf=(unsigned char *)s->init_buf->data; | |
12bf56c0 | 1459 | #ifdef OPENSSL_NO_TLSEXT |
d02b48c6 | 1460 | p=s->s3->server_random; |
12bf56c0 | 1461 | /* Generate server_random if it was not needed previously */ |
7bbcb2f6 | 1462 | Time=(unsigned long)time(NULL); /* Time */ |
d02b48c6 | 1463 | l2n(Time,p); |
7c7667b8 NL |
1464 | if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) |
1465 | return -1; | |
12bf56c0 | 1466 | #endif |
d02b48c6 RE |
1467 | /* Do the message type and length last */ |
1468 | d=p= &(buf[4]); | |
1469 | ||
58964a49 RE |
1470 | *(p++)=s->version>>8; |
1471 | *(p++)=s->version&0xff; | |
d02b48c6 RE |
1472 | |
1473 | /* Random stuff */ | |
1474 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
1475 | p+=SSL3_RANDOM_SIZE; | |
1476 | ||
c519e89f BM |
1477 | /* There are several cases for the session ID to send |
1478 | * back in the server hello: | |
1479 | * - For session reuse from the session cache, | |
1480 | * we send back the old session ID. | |
1481 | * - If stateless session reuse (using a session ticket) | |
1482 | * is successful, we send back the client's "session ID" | |
1483 | * (which doesn't actually identify the session). | |
1484 | * - If it is a new session, we send back the new | |
1485 | * session ID. | |
1486 | * - However, if we want the new session to be single-use, | |
1487 | * we send back a 0-length session ID. | |
1488 | * s->hit is non-zero in either case of session reuse, | |
1489 | * so the following won't overwrite an ID that we're supposed | |
1490 | * to send back. | |
d02b48c6 | 1491 | */ |
7c2d4fee BM |
1492 | if (s->session->not_resumable || |
1493 | (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER) | |
1494 | && !s->hit)) | |
58964a49 | 1495 | s->session->session_id_length=0; |
d02b48c6 RE |
1496 | |
1497 | sl=s->session->session_id_length; | |
27545970 | 1498 | if (sl > (int)sizeof(s->session->session_id)) |
5574e0ed BM |
1499 | { |
1500 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1501 | return -1; | |
1502 | } | |
d02b48c6 RE |
1503 | *(p++)=sl; |
1504 | memcpy(p,s->session->session_id,sl); | |
1505 | p+=sl; | |
1506 | ||
1507 | /* put the cipher */ | |
1508 | i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p); | |
1509 | p+=i; | |
1510 | ||
1511 | /* put the compression method */ | |
09b6c2ef DSH |
1512 | #ifdef OPENSSL_NO_COMP |
1513 | *(p++)=0; | |
1514 | #else | |
413c4f45 MC |
1515 | if (s->s3->tmp.new_compression == NULL) |
1516 | *(p++)=0; | |
1517 | else | |
1518 | *(p++)=s->s3->tmp.new_compression->id; | |
09b6c2ef | 1519 | #endif |
ed3883d2 | 1520 | #ifndef OPENSSL_NO_TLSEXT |
36ca4ba6 BM |
1521 | if (ssl_prepare_serverhello_tlsext(s) <= 0) |
1522 | { | |
1523 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); | |
1524 | return -1; | |
1525 | } | |
f1fd4544 BM |
1526 | if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) |
1527 | { | |
ed3883d2 BM |
1528 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR); |
1529 | return -1; | |
f1fd4544 | 1530 | } |
ed3883d2 | 1531 | #endif |
d02b48c6 RE |
1532 | /* do the header */ |
1533 | l=(p-d); | |
1534 | d=buf; | |
1535 | *(d++)=SSL3_MT_SERVER_HELLO; | |
1536 | l2n3(l,d); | |
1537 | ||
fcbdde0d | 1538 | s->state=SSL3_ST_SW_SRVR_HELLO_B; |
d02b48c6 RE |
1539 | /* number of bytes to write */ |
1540 | s->init_num=p-buf; | |
1541 | s->init_off=0; | |
1542 | } | |
1543 | ||
fcbdde0d | 1544 | /* SSL3_ST_SW_SRVR_HELLO_B */ |
d02b48c6 RE |
1545 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); |
1546 | } | |
1547 | ||
36d16f8e | 1548 | int ssl3_send_server_done(SSL *s) |
d02b48c6 RE |
1549 | { |
1550 | unsigned char *p; | |
1551 | ||
1552 | if (s->state == SSL3_ST_SW_SRVR_DONE_A) | |
1553 | { | |
1554 | p=(unsigned char *)s->init_buf->data; | |
1555 | ||
1556 | /* do the header */ | |
1557 | *(p++)=SSL3_MT_SERVER_DONE; | |
1558 | *(p++)=0; | |
1559 | *(p++)=0; | |
1560 | *(p++)=0; | |
1561 | ||
1562 | s->state=SSL3_ST_SW_SRVR_DONE_B; | |
1563 | /* number of bytes to write */ | |
1564 | s->init_num=4; | |
1565 | s->init_off=0; | |
1566 | } | |
1567 | ||
e65bcbce | 1568 | /* SSL3_ST_SW_SRVR_DONE_B */ |
d02b48c6 RE |
1569 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); |
1570 | } | |
1571 | ||
36d16f8e | 1572 | int ssl3_send_server_key_exchange(SSL *s) |
d02b48c6 | 1573 | { |
bc36ee62 | 1574 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
1575 | unsigned char *q; |
1576 | int j,num; | |
1577 | RSA *rsa; | |
1578 | unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; | |
752d706a | 1579 | unsigned int u; |
d02b48c6 | 1580 | #endif |
bc36ee62 | 1581 | #ifndef OPENSSL_NO_DH |
9d1a01be | 1582 | DH *dh=NULL,*dhp; |
ea262260 BM |
1583 | #endif |
1584 | #ifndef OPENSSL_NO_ECDH | |
1585 | EC_KEY *ecdh=NULL, *ecdhp; | |
1586 | unsigned char *encodedPoint = NULL; | |
1587 | int encodedlen = 0; | |
1588 | int curve_id = 0; | |
1589 | BN_CTX *bn_ctx = NULL; | |
d02b48c6 RE |
1590 | #endif |
1591 | EVP_PKEY *pkey; | |
6b7be581 | 1592 | const EVP_MD *md = NULL; |
d02b48c6 RE |
1593 | unsigned char *p,*d; |
1594 | int al,i; | |
1595 | unsigned long type; | |
1596 | int n; | |
1597 | CERT *cert; | |
1598 | BIGNUM *r[4]; | |
1599 | int nr[4],kn; | |
1600 | BUF_MEM *buf; | |
1601 | EVP_MD_CTX md_ctx; | |
1602 | ||
dbad1690 | 1603 | EVP_MD_CTX_init(&md_ctx); |
d02b48c6 RE |
1604 | if (s->state == SSL3_ST_SW_KEY_EXCH_A) |
1605 | { | |
52b8dad8 | 1606 | type=s->s3->tmp.new_cipher->algorithm_mkey; |
b56bce4f | 1607 | cert=s->cert; |
d02b48c6 RE |
1608 | |
1609 | buf=s->init_buf; | |
1610 | ||
1611 | r[0]=r[1]=r[2]=r[3]=NULL; | |
1612 | n=0; | |
bc36ee62 | 1613 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
1614 | if (type & SSL_kRSA) |
1615 | { | |
1616 | rsa=cert->rsa_tmp; | |
ca8e5b9b | 1617 | if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL)) |
d02b48c6 | 1618 | { |
ca8e5b9b | 1619 | rsa=s->cert->rsa_tmp_cb(s, |
f415fa32 | 1620 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), |
60e31c3a | 1621 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); |
fbb41ae0 DSH |
1622 | if(rsa == NULL) |
1623 | { | |
1624 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1625 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY); | |
1626 | goto f_err; | |
1627 | } | |
6ac4e8bd | 1628 | RSA_up_ref(rsa); |
d02b48c6 RE |
1629 | cert->rsa_tmp=rsa; |
1630 | } | |
1631 | if (rsa == NULL) | |
1632 | { | |
58964a49 | 1633 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1634 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY); |
1635 | goto f_err; | |
1636 | } | |
1637 | r[0]=rsa->n; | |
1638 | r[1]=rsa->e; | |
1639 | s->s3->tmp.use_rsa_tmp=1; | |
1640 | } | |
1641 | else | |
1642 | #endif | |
bc36ee62 | 1643 | #ifndef OPENSSL_NO_DH |
d02b48c6 RE |
1644 | if (type & SSL_kEDH) |
1645 | { | |
1646 | dhp=cert->dh_tmp; | |
ca8e5b9b BM |
1647 | if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL)) |
1648 | dhp=s->cert->dh_tmp_cb(s, | |
2c05c494 | 1649 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), |
60e31c3a | 1650 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); |
d02b48c6 RE |
1651 | if (dhp == NULL) |
1652 | { | |
58964a49 | 1653 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1654 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
1655 | goto f_err; | |
1656 | } | |
a87030a1 BM |
1657 | |
1658 | if (s->s3->tmp.dh != NULL) | |
1659 | { | |
5277d7cb | 1660 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
a87030a1 BM |
1661 | goto err; |
1662 | } | |
1663 | ||
d02b48c6 RE |
1664 | if ((dh=DHparams_dup(dhp)) == NULL) |
1665 | { | |
1666 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1667 | goto err; | |
1668 | } | |
1669 | ||
1670 | s->s3->tmp.dh=dh; | |
6fa89f94 BL |
1671 | if ((dhp->pub_key == NULL || |
1672 | dhp->priv_key == NULL || | |
1673 | (s->options & SSL_OP_SINGLE_DH_USE))) | |
d02b48c6 | 1674 | { |
6fa89f94 BL |
1675 | if(!DH_generate_key(dh)) |
1676 | { | |
1677 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, | |
1678 | ERR_R_DH_LIB); | |
1679 | goto err; | |
1680 | } | |
d02b48c6 RE |
1681 | } |
1682 | else | |
1683 | { | |
1684 | dh->pub_key=BN_dup(dhp->pub_key); | |
1685 | dh->priv_key=BN_dup(dhp->priv_key); | |
1686 | if ((dh->pub_key == NULL) || | |
1687 | (dh->priv_key == NULL)) | |
1688 | { | |
1689 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1690 | goto err; | |
1691 | } | |
1692 | } | |
1693 | r[0]=dh->p; | |
1694 | r[1]=dh->g; | |
1695 | r[2]=dh->pub_key; | |
1696 | } | |
1697 | else | |
1698 | #endif | |
ea262260 | 1699 | #ifndef OPENSSL_NO_ECDH |
89bbe14c | 1700 | if (type & SSL_kEECDH) |
ea262260 | 1701 | { |
9dd84053 NL |
1702 | const EC_GROUP *group; |
1703 | ||
ea262260 | 1704 | ecdhp=cert->ecdh_tmp; |
a4352630 DSH |
1705 | if (s->cert->ecdh_tmp_auto) |
1706 | { | |
1707 | /* Get NID of first shared curve */ | |
1708 | int nid = tls1_shared_curve(s, 0); | |
1709 | if (nid != NID_undef) | |
1710 | ecdhp = EC_KEY_new_by_curve_name(nid); | |
1711 | } | |
1712 | else if ((ecdhp == NULL) && s->cert->ecdh_tmp_cb) | |
ea262260 BM |
1713 | { |
1714 | ecdhp=s->cert->ecdh_tmp_cb(s, | |
1715 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), | |
1716 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); | |
1717 | } | |
1718 | if (ecdhp == NULL) | |
1719 | { | |
1720 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1721 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); | |
1722 | goto f_err; | |
1723 | } | |
1724 | ||
1725 | if (s->s3->tmp.ecdh != NULL) | |
1726 | { | |
ea262260 BM |
1727 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
1728 | goto err; | |
1729 | } | |
1730 | ||
1731 | /* Duplicate the ECDH structure. */ | |
1732 | if (ecdhp == NULL) | |
1733 | { | |
1734 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1735 | goto err; | |
1736 | } | |
a4352630 DSH |
1737 | if (s->cert->ecdh_tmp_auto) |
1738 | ecdh = ecdhp; | |
1739 | else if ((ecdh = EC_KEY_dup(ecdhp)) == NULL) | |
ea262260 | 1740 | { |
aa4ce731 | 1741 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); |
ea262260 BM |
1742 | goto err; |
1743 | } | |
ea262260 BM |
1744 | |
1745 | s->s3->tmp.ecdh=ecdh; | |
9dd84053 NL |
1746 | if ((EC_KEY_get0_public_key(ecdh) == NULL) || |
1747 | (EC_KEY_get0_private_key(ecdh) == NULL) || | |
ea262260 BM |
1748 | (s->options & SSL_OP_SINGLE_ECDH_USE)) |
1749 | { | |
1750 | if(!EC_KEY_generate_key(ecdh)) | |
1751 | { | |
1752 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1753 | goto err; | |
1754 | } | |
1755 | } | |
1756 | ||
9dd84053 NL |
1757 | if (((group = EC_KEY_get0_group(ecdh)) == NULL) || |
1758 | (EC_KEY_get0_public_key(ecdh) == NULL) || | |
1759 | (EC_KEY_get0_private_key(ecdh) == NULL)) | |
ea262260 BM |
1760 | { |
1761 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1762 | goto err; | |
1763 | } | |
1764 | ||
1765 | if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && | |
9dd84053 | 1766 | (EC_GROUP_get_degree(group) > 163)) |
ea262260 BM |
1767 | { |
1768 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); | |
1769 | goto err; | |
1770 | } | |
1771 | ||
1772 | /* XXX: For now, we only support ephemeral ECDH | |
1773 | * keys over named (not generic) curves. For | |
1774 | * supported named curves, curve_id is non-zero. | |
1775 | */ | |
1776 | if ((curve_id = | |
33273721 | 1777 | tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group))) |
ea262260 BM |
1778 | == 0) |
1779 | { | |
1780 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE); | |
1781 | goto err; | |
1782 | } | |
1783 | ||
1784 | /* Encode the public key. | |
1785 | * First check the size of encoding and | |
1786 | * allocate memory accordingly. | |
1787 | */ | |
9dd84053 NL |
1788 | encodedlen = EC_POINT_point2oct(group, |
1789 | EC_KEY_get0_public_key(ecdh), | |
ea262260 BM |
1790 | POINT_CONVERSION_UNCOMPRESSED, |
1791 | NULL, 0, NULL); | |
1792 | ||
1793 | encodedPoint = (unsigned char *) | |
1794 | OPENSSL_malloc(encodedlen*sizeof(unsigned char)); | |
1795 | bn_ctx = BN_CTX_new(); | |
1796 | if ((encodedPoint == NULL) || (bn_ctx == NULL)) | |
1797 | { | |
1798 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); | |
1799 | goto err; | |
1800 | } | |
1801 | ||
1802 | ||
9dd84053 NL |
1803 | encodedlen = EC_POINT_point2oct(group, |
1804 | EC_KEY_get0_public_key(ecdh), | |
ea262260 BM |
1805 | POINT_CONVERSION_UNCOMPRESSED, |
1806 | encodedPoint, encodedlen, bn_ctx); | |
1807 | ||
1808 | if (encodedlen == 0) | |
1809 | { | |
1810 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1811 | goto err; | |
1812 | } | |
1813 | ||
1814 | BN_CTX_free(bn_ctx); bn_ctx=NULL; | |
1815 | ||
1816 | /* XXX: For now, we only support named (not | |
1817 | * generic) curves in ECDH ephemeral key exchanges. | |
d56349a2 | 1818 | * In this situation, we need four additional bytes |
ea262260 BM |
1819 | * to encode the entire ServerECDHParams |
1820 | * structure. | |
1821 | */ | |
d56349a2 | 1822 | n = 4 + encodedlen; |
ea262260 BM |
1823 | |
1824 | /* We'll generate the serverKeyExchange message | |
1825 | * explicitly so we can set these to NULLs | |
1826 | */ | |
1827 | r[0]=NULL; | |
1828 | r[1]=NULL; | |
1829 | r[2]=NULL; | |
d56349a2 | 1830 | r[3]=NULL; |
ea262260 BM |
1831 | } |
1832 | else | |
1833 | #endif /* !OPENSSL_NO_ECDH */ | |
ddac1974 NL |
1834 | #ifndef OPENSSL_NO_PSK |
1835 | if (type & SSL_kPSK) | |
1836 | { | |
1837 | /* reserve size for record length and PSK identity hint*/ | |
1838 | n+=2+strlen(s->ctx->psk_identity_hint); | |
1839 | } | |
1840 | else | |
1841 | #endif /* !OPENSSL_NO_PSK */ | |
edc032b5 BL |
1842 | #ifndef OPENSSL_NO_SRP |
1843 | if (type & SSL_kSRP) | |
1844 | { | |
1845 | if ((s->srp_ctx.N == NULL) || | |
1846 | (s->srp_ctx.g == NULL) || | |
1847 | (s->srp_ctx.s == NULL) || | |
1848 | (s->srp_ctx.B == NULL)) | |
1849 | { | |
1850 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_SRP_PARAM); | |
1851 | goto err; | |
1852 | } | |
1853 | r[0]=s->srp_ctx.N; | |
1854 | r[1]=s->srp_ctx.g; | |
1855 | r[2]=s->srp_ctx.s; | |
1856 | r[3]=s->srp_ctx.B; | |
1857 | } | |
1858 | else | |
1859 | #endif | |
d02b48c6 | 1860 | { |
58964a49 | 1861 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1862 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); |
1863 | goto f_err; | |
1864 | } | |
edc032b5 | 1865 | for (i=0; r[i] != NULL && i<4; i++) |
d02b48c6 RE |
1866 | { |
1867 | nr[i]=BN_num_bytes(r[i]); | |
edc032b5 BL |
1868 | #ifndef OPENSSL_NO_SRP |
1869 | if ((i == 2) && (type & SSL_kSRP)) | |
1870 | n+=1+nr[i]; | |
1871 | else | |
1872 | #endif | |
d02b48c6 RE |
1873 | n+=2+nr[i]; |
1874 | } | |
1875 | ||
52b8dad8 BM |
1876 | if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) |
1877 | && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) | |
d02b48c6 | 1878 | { |
6b7be581 | 1879 | if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher,&md)) |
d02b48c6 RE |
1880 | == NULL) |
1881 | { | |
58964a49 | 1882 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1883 | goto f_err; |
1884 | } | |
1885 | kn=EVP_PKEY_size(pkey); | |
1886 | } | |
1887 | else | |
1888 | { | |
1889 | pkey=NULL; | |
1890 | kn=0; | |
1891 | } | |
1892 | ||
54a656ef | 1893 | if (!BUF_MEM_grow_clean(buf,n+4+kn)) |
d02b48c6 RE |
1894 | { |
1895 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF); | |
1896 | goto err; | |
1897 | } | |
1898 | d=(unsigned char *)s->init_buf->data; | |
1899 | p= &(d[4]); | |
1900 | ||
edc032b5 | 1901 | for (i=0; r[i] != NULL && i<4; i++) |
d02b48c6 | 1902 | { |
edc032b5 BL |
1903 | #ifndef OPENSSL_NO_SRP |
1904 | if ((i == 2) && (type & SSL_kSRP)) | |
1905 | { | |
1906 | *p = nr[i]; | |
1907 | p++; | |
1908 | } | |
1909 | else | |
1910 | #endif | |
d02b48c6 RE |
1911 | s2n(nr[i],p); |
1912 | BN_bn2bin(r[i],p); | |
1913 | p+=nr[i]; | |
1914 | } | |
1915 | ||
ea262260 | 1916 | #ifndef OPENSSL_NO_ECDH |
89bbe14c | 1917 | if (type & SSL_kEECDH) |
ea262260 BM |
1918 | { |
1919 | /* XXX: For now, we only support named (not generic) curves. | |
1920 | * In this situation, the serverKeyExchange message has: | |
d56349a2 | 1921 | * [1 byte CurveType], [2 byte CurveName] |
ea262260 BM |
1922 | * [1 byte length of encoded point], followed by |
1923 | * the actual encoded point itself | |
1924 | */ | |
1925 | *p = NAMED_CURVE_TYPE; | |
1926 | p += 1; | |
d56349a2 BM |
1927 | *p = 0; |
1928 | p += 1; | |
ea262260 BM |
1929 | *p = curve_id; |
1930 | p += 1; | |
1931 | *p = encodedlen; | |
1932 | p += 1; | |
1933 | memcpy((unsigned char*)p, | |
1934 | (unsigned char *)encodedPoint, | |
1935 | encodedlen); | |
1936 | OPENSSL_free(encodedPoint); | |
4f7533eb | 1937 | encodedPoint = NULL; |
ea262260 BM |
1938 | p += encodedlen; |
1939 | } | |
1940 | #endif | |
1941 | ||
ddac1974 NL |
1942 | #ifndef OPENSSL_NO_PSK |
1943 | if (type & SSL_kPSK) | |
1944 | { | |
1945 | /* copy PSK identity hint */ | |
1946 | s2n(strlen(s->ctx->psk_identity_hint), p); | |
07ef6129 | 1947 | strncpy((char *)p, s->ctx->psk_identity_hint, strlen(s->ctx->psk_identity_hint)); |
ddac1974 NL |
1948 | p+=strlen(s->ctx->psk_identity_hint); |
1949 | } | |
1950 | #endif | |
1951 | ||
d02b48c6 RE |
1952 | /* not anonymous */ |
1953 | if (pkey != NULL) | |
1954 | { | |
1955 | /* n is the length of the params, they start at &(d[4]) | |
1956 | * and p points to the space at the end. */ | |
bc36ee62 | 1957 | #ifndef OPENSSL_NO_RSA |
6b7be581 | 1958 | if (pkey->type == EVP_PKEY_RSA |
238b6361 | 1959 | && TLS1_get_version(s) < TLS1_2_VERSION) |
d02b48c6 RE |
1960 | { |
1961 | q=md_buf; | |
1962 | j=0; | |
1963 | for (num=2; num > 0; num--) | |
1964 | { | |
086e32a6 DSH |
1965 | EVP_MD_CTX_set_flags(&md_ctx, |
1966 | EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); | |
70051b1d DSH |
1967 | EVP_DigestInit_ex(&md_ctx,(num == 2) |
1968 | ?s->ctx->md5:s->ctx->sha1, NULL); | |
43982224 DSH |
1969 | EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); |
1970 | EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
1971 | EVP_DigestUpdate(&md_ctx,&(d[4]),n); | |
1972 | EVP_DigestFinal_ex(&md_ctx,q, | |
1973 | (unsigned int *)&i); | |
d02b48c6 RE |
1974 | q+=i; |
1975 | j+=i; | |
1976 | } | |
1c80019a | 1977 | if (RSA_sign(NID_md5_sha1, md_buf, j, |
ca7fea96 | 1978 | &(p[2]), &u, pkey->pkey.rsa) <= 0) |
d02b48c6 RE |
1979 | { |
1980 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA); | |
1981 | goto err; | |
1982 | } | |
ca7fea96 BL |
1983 | s2n(u,p); |
1984 | n+=u+2; | |
d02b48c6 RE |
1985 | } |
1986 | else | |
1987 | #endif | |
6b7be581 | 1988 | if (md) |
d02b48c6 | 1989 | { |
6b7be581 DSH |
1990 | /* For TLS1.2 and later send signature |
1991 | * algorithm */ | |
238b6361 | 1992 | if (TLS1_get_version(s) >= TLS1_2_VERSION) |
d02b48c6 | 1993 | { |
6b7be581 DSH |
1994 | if (!tls12_get_sigandhash(p, pkey, md)) |
1995 | { | |
1996 | /* Should never happen */ | |
1997 | al=SSL_AD_INTERNAL_ERROR; | |
1998 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); | |
1999 | goto f_err; | |
2000 | } | |
2001 | p+=2; | |
d02b48c6 | 2002 | } |
a2f9200f DSH |
2003 | #ifdef SSL_DEBUG |
2004 | fprintf(stderr, "Using hash %s\n", | |
2005 | EVP_MD_name(md)); | |
2006 | #endif | |
6b7be581 | 2007 | EVP_SignInit_ex(&md_ctx, md, NULL); |
43982224 DSH |
2008 | EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); |
2009 | EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
2010 | EVP_SignUpdate(&md_ctx,&(d[4]),n); | |
2011 | if (!EVP_SignFinal(&md_ctx,&(p[2]), | |
2012 | (unsigned int *)&i,pkey)) | |
ea262260 | 2013 | { |
6b7be581 | 2014 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_EVP); |
ea262260 BM |
2015 | goto err; |
2016 | } | |
2017 | s2n(i,p); | |
2018 | n+=i+2; | |
238b6361 | 2019 | if (TLS1_get_version(s) >= TLS1_2_VERSION) |
6b7be581 | 2020 | n+= 2; |
ea262260 BM |
2021 | } |
2022 | else | |
d02b48c6 RE |
2023 | { |
2024 | /* Is this error check actually needed? */ | |
58964a49 | 2025 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
2026 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE); |
2027 | goto f_err; | |
2028 | } | |
2029 | } | |
2030 | ||
2031 | *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE; | |
2032 | l2n3(n,d); | |
2033 | ||
2034 | /* we should now have things packed up, so lets send | |
2035 | * it off */ | |
2036 | s->init_num=n+4; | |
2037 | s->init_off=0; | |
2038 | } | |
2039 | ||
a87030a1 | 2040 | s->state = SSL3_ST_SW_KEY_EXCH_B; |
dbad1690 | 2041 | EVP_MD_CTX_cleanup(&md_ctx); |
d02b48c6 RE |
2042 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); |
2043 | f_err: | |
2044 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
2045 | err: | |
ea262260 BM |
2046 | #ifndef OPENSSL_NO_ECDH |
2047 | if (encodedPoint != NULL) OPENSSL_free(encodedPoint); | |
2048 | BN_CTX_free(bn_ctx); | |
2049 | #endif | |
dbad1690 | 2050 | EVP_MD_CTX_cleanup(&md_ctx); |
d02b48c6 RE |
2051 | return(-1); |
2052 | } | |
2053 | ||
36d16f8e | 2054 | int ssl3_send_certificate_request(SSL *s) |
d02b48c6 RE |
2055 | { |
2056 | unsigned char *p,*d; | |
2057 | int i,j,nl,off,n; | |
f73e07cf | 2058 | STACK_OF(X509_NAME) *sk=NULL; |
d02b48c6 RE |
2059 | X509_NAME *name; |
2060 | BUF_MEM *buf; | |
2061 | ||
2062 | if (s->state == SSL3_ST_SW_CERT_REQ_A) | |
2063 | { | |
2064 | buf=s->init_buf; | |
2065 | ||
2066 | d=p=(unsigned char *)&(buf->data[4]); | |
2067 | ||
2068 | /* get the list of acceptable cert types */ | |
2069 | p++; | |
2070 | n=ssl3_get_req_cert_type(s,p); | |
2071 | d[0]=n; | |
2072 | p+=n; | |
2073 | n++; | |
2074 | ||
238b6361 | 2075 | if (TLS1_get_version(s) >= TLS1_2_VERSION) |
f37f20ff | 2076 | { |
b7bfe69b DSH |
2077 | const unsigned char *psigs; |
2078 | nl = tls12_get_psigalgs(s, &psigs); | |
f37f20ff | 2079 | s2n(nl, p); |
b7bfe69b DSH |
2080 | memcpy(p, psigs, nl); |
2081 | p += nl; | |
f37f20ff DSH |
2082 | n += nl + 2; |
2083 | } | |
2084 | ||
d02b48c6 RE |
2085 | off=n; |
2086 | p+=2; | |
2087 | n+=2; | |
2088 | ||
2089 | sk=SSL_get_client_CA_list(s); | |
2090 | nl=0; | |
2091 | if (sk != NULL) | |
2092 | { | |
f73e07cf | 2093 | for (i=0; i<sk_X509_NAME_num(sk); i++) |
d02b48c6 | 2094 | { |
f73e07cf | 2095 | name=sk_X509_NAME_value(sk,i); |
d02b48c6 | 2096 | j=i2d_X509_NAME(name,NULL); |
54a656ef | 2097 | if (!BUF_MEM_grow_clean(buf,4+n+j+2)) |
d02b48c6 RE |
2098 | { |
2099 | SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB); | |
2100 | goto err; | |
2101 | } | |
2102 | p=(unsigned char *)&(buf->data[4+n]); | |
58964a49 | 2103 | if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) |
d02b48c6 RE |
2104 | { |
2105 | s2n(j,p); | |
2106 | i2d_X509_NAME(name,&p); | |
2107 | n+=2+j; | |
2108 | nl+=2+j; | |
2109 | } | |
2110 | else | |
2111 | { | |
2112 | d=p; | |
2113 | i2d_X509_NAME(name,&p); | |
2114 | j-=2; s2n(j,d); j+=2; | |
2115 | n+=j; | |
2116 | nl+=j; | |
2117 | } | |
2118 | } | |
2119 | } | |
2120 | /* else no CA names */ | |
2121 | p=(unsigned char *)&(buf->data[4+off]); | |
2122 | s2n(nl,p); | |
2123 | ||
2124 | d=(unsigned char *)buf->data; | |
2125 | *(d++)=SSL3_MT_CERTIFICATE_REQUEST; | |
2126 | l2n3(n,d); | |
2127 | ||
2128 | /* we should now have things packed up, so lets send | |
2129 | * it off */ | |
2130 | ||
2131 | s->init_num=n+4; | |
2132 | s->init_off=0; | |
de469ef2 DSH |
2133 | #ifdef NETSCAPE_HANG_BUG |
2134 | p=(unsigned char *)s->init_buf->data + s->init_num; | |
2135 | ||
2136 | /* do the header */ | |
2137 | *(p++)=SSL3_MT_SERVER_DONE; | |
2138 | *(p++)=0; | |
2139 | *(p++)=0; | |
2140 | *(p++)=0; | |
2141 | s->init_num += 4; | |
2142 | #endif | |
2143 | ||
e59659dc | 2144 | s->state = SSL3_ST_SW_CERT_REQ_B; |
d02b48c6 RE |
2145 | } |
2146 | ||
2147 | /* SSL3_ST_SW_CERT_REQ_B */ | |
2148 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
2149 | err: | |
2150 | return(-1); | |
2151 | } | |
2152 | ||
36d16f8e | 2153 | int ssl3_get_client_key_exchange(SSL *s) |
d02b48c6 RE |
2154 | { |
2155 | int i,al,ok; | |
2156 | long n; | |
52b8dad8 | 2157 | unsigned long alg_k; |
d02b48c6 | 2158 | unsigned char *p; |
bc36ee62 | 2159 | #ifndef OPENSSL_NO_RSA |
d02b48c6 | 2160 | RSA *rsa=NULL; |
d02b48c6 | 2161 | EVP_PKEY *pkey=NULL; |
79df9d62 | 2162 | #endif |
bc36ee62 | 2163 | #ifndef OPENSSL_NO_DH |
58964a49 | 2164 | BIGNUM *pub=NULL; |
0d609395 | 2165 | DH *dh_srvr, *dh_clnt = NULL; |
58964a49 | 2166 | #endif |
bc36ee62 | 2167 | #ifndef OPENSSL_NO_KRB5 |
52b8dad8 | 2168 | KSSL_ERR kssl_err; |
bc36ee62 | 2169 | #endif /* OPENSSL_NO_KRB5 */ |
d02b48c6 | 2170 | |
ea262260 BM |
2171 | #ifndef OPENSSL_NO_ECDH |
2172 | EC_KEY *srvr_ecdh = NULL; | |
2173 | EVP_PKEY *clnt_pub_pkey = NULL; | |
2174 | EC_POINT *clnt_ecpoint = NULL; | |
2175 | BN_CTX *bn_ctx = NULL; | |
2176 | #endif | |
2177 | ||
36d16f8e | 2178 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
2179 | SSL3_ST_SR_KEY_EXCH_A, |
2180 | SSL3_ST_SR_KEY_EXCH_B, | |
2181 | SSL3_MT_CLIENT_KEY_EXCHANGE, | |
73969585 | 2182 | 2048, /* ??? */ |
d02b48c6 RE |
2183 | &ok); |
2184 | ||
2185 | if (!ok) return((int)n); | |
48948d53 | 2186 | p=(unsigned char *)s->init_msg; |
d02b48c6 | 2187 | |
52b8dad8 | 2188 | alg_k=s->s3->tmp.new_cipher->algorithm_mkey; |
d02b48c6 | 2189 | |
bc36ee62 | 2190 | #ifndef OPENSSL_NO_RSA |
52b8dad8 | 2191 | if (alg_k & SSL_kRSA) |
d02b48c6 RE |
2192 | { |
2193 | /* FIX THIS UP EAY EAY EAY EAY */ | |
2194 | if (s->s3->tmp.use_rsa_tmp) | |
2195 | { | |
b56bce4f | 2196 | if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL)) |
ca8e5b9b | 2197 | rsa=s->cert->rsa_tmp; |
d02b48c6 RE |
2198 | /* Don't do a callback because rsa_tmp should |
2199 | * be sent already */ | |
2200 | if (rsa == NULL) | |
2201 | { | |
58964a49 | 2202 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
2203 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY); |
2204 | goto f_err; | |
2205 | ||
2206 | } | |
2207 | } | |
2208 | else | |
2209 | { | |
2210 | pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey; | |
2211 | if ( (pkey == NULL) || | |
2212 | (pkey->type != EVP_PKEY_RSA) || | |
2213 | (pkey->pkey.rsa == NULL)) | |
2214 | { | |
58964a49 | 2215 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
2216 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE); |
2217 | goto f_err; | |
2218 | } | |
2219 | rsa=pkey->pkey.rsa; | |
2220 | } | |
2221 | ||
7432d073 | 2222 | /* TLS and [incidentally] DTLS{0xFEFF} */ |
8711efb4 | 2223 | if (s->version > SSL3_VERSION && s->version != DTLS1_BAD_VER) |
58964a49 RE |
2224 | { |
2225 | n2s(p,i); | |
2226 | if (n != i+2) | |
2227 | { | |
2228 | if (!(s->options & SSL_OP_TLS_D5_BUG)) | |
2229 | { | |
2230 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG); | |
2231 | goto err; | |
2232 | } | |
2233 | else | |
2234 | p-=2; | |
2235 | } | |
2236 | else | |
2237 | n=i; | |
2238 | } | |
2239 | ||
d02b48c6 | 2240 | i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING); |
58964a49 | 2241 | |
31bc51c8 BM |
2242 | al = -1; |
2243 | ||
d02b48c6 RE |
2244 | if (i != SSL_MAX_MASTER_KEY_LENGTH) |
2245 | { | |
2246 | al=SSL_AD_DECODE_ERROR; | |
02da5bcd | 2247 | /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); */ |
d02b48c6 RE |
2248 | } |
2249 | ||
31bc51c8 | 2250 | if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff)))) |
d02b48c6 | 2251 | { |
2c05c494 BM |
2252 | /* The premaster secret must contain the same version number as the |
2253 | * ClientHello to detect version rollback attacks (strangely, the | |
2254 | * protocol does not offer such protection for DH ciphersuites). | |
2255 | * However, buggy clients exist that send the negotiated protocol | |
93d8bfcd | 2256 | * version instead if the server does not support the requested |
2c05c494 BM |
2257 | * protocol version. |
2258 | * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */ | |
2259 | if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) && | |
2260 | (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff)))) | |
2261 | { | |
2262 | al=SSL_AD_DECODE_ERROR; | |
02da5bcd BM |
2263 | /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER); */ |
2264 | ||
2265 | /* The Klima-Pokorny-Rosa extension of Bleichenbacher's attack | |
2266 | * (http://eprint.iacr.org/2003/052/) exploits the version | |
2267 | * number check as a "bad version oracle" -- an alert would | |
2268 | * reveal that the plaintext corresponding to some ciphertext | |
2269 | * made up by the adversary is properly formatted except | |
2270 | * that the version number is wrong. To avoid such attacks, | |
2271 | * we should treat this just like any other decryption error. */ | |
2c05c494 | 2272 | } |
d02b48c6 | 2273 | } |
d02b48c6 | 2274 | |
31bc51c8 BM |
2275 | if (al != -1) |
2276 | { | |
31bc51c8 BM |
2277 | /* Some decryption failure -- use random value instead as countermeasure |
2278 | * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding | |
02da5bcd | 2279 | * (see RFC 2246, section 7.4.7.1). */ |
31bc51c8 BM |
2280 | ERR_clear_error(); |
2281 | i = SSL_MAX_MASTER_KEY_LENGTH; | |
2282 | p[0] = s->client_version >> 8; | |
2283 | p[1] = s->client_version & 0xff; | |
7c7667b8 NL |
2284 | if (RAND_pseudo_bytes(p+2, i-2) <= 0) /* should be RAND_bytes, but we cannot work around a failure */ |
2285 | goto err; | |
31bc51c8 BM |
2286 | } |
2287 | ||
d02b48c6 | 2288 | s->session->master_key_length= |
58964a49 | 2289 | s->method->ssl3_enc->generate_master_secret(s, |
d02b48c6 RE |
2290 | s->session->master_key, |
2291 | p,i); | |
43d60164 | 2292 | OPENSSL_cleanse(p,i); |
d02b48c6 RE |
2293 | } |
2294 | else | |
4c5fac4a | 2295 | #endif |
bc36ee62 | 2296 | #ifndef OPENSSL_NO_DH |
52b8dad8 | 2297 | if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) |
d02b48c6 | 2298 | { |
0d609395 DSH |
2299 | int idx = -1; |
2300 | EVP_PKEY *skey = NULL; | |
2301 | if (n) | |
2302 | n2s(p,i); | |
de2b5b74 DSH |
2303 | else |
2304 | i = 0; | |
0d609395 | 2305 | if (n && n != i+2) |
d02b48c6 | 2306 | { |
58964a49 | 2307 | if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG)) |
d02b48c6 RE |
2308 | { |
2309 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG); | |
2310 | goto err; | |
2311 | } | |
2312 | else | |
2313 | { | |
2314 | p-=2; | |
2315 | i=(int)n; | |
2316 | } | |
2317 | } | |
0d609395 DSH |
2318 | if (alg_k & SSL_kDHr) |
2319 | idx = SSL_PKEY_DH_RSA; | |
2320 | else if (alg_k & SSL_kDHd) | |
2321 | idx = SSL_PKEY_DH_DSA; | |
2322 | if (idx >= 0) | |
2323 | { | |
2324 | skey = s->cert->pkeys[idx].privatekey; | |
2325 | if ((skey == NULL) || | |
2326 | (skey->type != EVP_PKEY_DH) || | |
2327 | (skey->pkey.dh == NULL)) | |
2328 | { | |
2329 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2330 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE); | |
2331 | goto f_err; | |
2332 | } | |
2333 | dh_srvr = skey->pkey.dh; | |
2334 | } | |
2335 | else if (s->s3->tmp.dh == NULL) | |
d02b48c6 | 2336 | { |
58964a49 | 2337 | al=SSL_AD_HANDSHAKE_FAILURE; |
0d609395 | 2338 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
d02b48c6 RE |
2339 | goto f_err; |
2340 | } | |
2341 | else | |
0d609395 DSH |
2342 | dh_srvr=s->s3->tmp.dh; |
2343 | ||
2344 | if (n == 0L) | |
d02b48c6 | 2345 | { |
0d609395 DSH |
2346 | /* Get pubkey from cert */ |
2347 | EVP_PKEY *clkey=X509_get_pubkey(s->session->peer); | |
2348 | if (clkey) | |
2349 | { | |
2350 | if (EVP_PKEY_cmp_parameters(clkey, skey) == 1) | |
2351 | dh_clnt = EVP_PKEY_get1_DH(clkey); | |
8e1dc4d7 | 2352 | } |
0d609395 | 2353 | if (dh_clnt == NULL) |
d02b48c6 | 2354 | { |
58964a49 | 2355 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
2356 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
2357 | goto f_err; | |
2358 | } | |
0d609395 DSH |
2359 | EVP_PKEY_free(clkey); |
2360 | pub = dh_clnt->pub_key; | |
d02b48c6 | 2361 | } |
0d609395 DSH |
2362 | else |
2363 | pub=BN_bin2bn(p,i,NULL); | |
d02b48c6 RE |
2364 | if (pub == NULL) |
2365 | { | |
2366 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB); | |
2367 | goto err; | |
2368 | } | |
58964a49 | 2369 | |
d02b48c6 RE |
2370 | i=DH_compute_key(p,pub,dh_srvr); |
2371 | ||
2372 | if (i <= 0) | |
2373 | { | |
2374 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); | |
25536ea6 | 2375 | BN_clear_free(pub); |
d02b48c6 RE |
2376 | goto err; |
2377 | } | |
2378 | ||
2379 | DH_free(s->s3->tmp.dh); | |
2380 | s->s3->tmp.dh=NULL; | |
0d609395 DSH |
2381 | if (dh_clnt) |
2382 | DH_free(dh_clnt); | |
2383 | else | |
2384 | BN_clear_free(pub); | |
d02b48c6 RE |
2385 | pub=NULL; |
2386 | s->session->master_key_length= | |
58964a49 | 2387 | s->method->ssl3_enc->generate_master_secret(s, |
d02b48c6 | 2388 | s->session->master_key,p,i); |
43d60164 | 2389 | OPENSSL_cleanse(p,i); |
0d609395 DSH |
2390 | if (dh_clnt) |
2391 | return 2; | |
d02b48c6 RE |
2392 | } |
2393 | else | |
2394 | #endif | |
bc36ee62 | 2395 | #ifndef OPENSSL_NO_KRB5 |
52b8dad8 BM |
2396 | if (alg_k & SSL_kKRB5) |
2397 | { | |
2398 | krb5_error_code krb5rc; | |
2a1ef754 RL |
2399 | krb5_data enc_ticket; |
2400 | krb5_data authenticator; | |
2401 | krb5_data enc_pms; | |
52b8dad8 | 2402 | KSSL_CTX *kssl_ctx = s->kssl_ctx; |
2a1ef754 | 2403 | EVP_CIPHER_CTX ciph_ctx; |
ef236ec3 | 2404 | const EVP_CIPHER *enc = NULL; |
2a1ef754 | 2405 | unsigned char iv[EVP_MAX_IV_LENGTH]; |
acdf4afb | 2406 | unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH |
52b8dad8 BM |
2407 | + EVP_MAX_BLOCK_LENGTH]; |
2408 | int padl, outl; | |
2a1ef754 RL |
2409 | krb5_timestamp authtime = 0; |
2410 | krb5_ticket_times ttimes; | |
f9b3bff6 | 2411 | |
de941e28 DSH |
2412 | EVP_CIPHER_CTX_init(&ciph_ctx); |
2413 | ||
52b8dad8 | 2414 | if (!kssl_ctx) kssl_ctx = kssl_ctx_new(); |
2a1ef754 RL |
2415 | |
2416 | n2s(p,i); | |
2417 | enc_ticket.length = i; | |
9e5790ce | 2418 | |
ef236ec3 | 2419 | if (n < (long)(enc_ticket.length + 6)) |
9e5790ce NL |
2420 | { |
2421 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2422 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2423 | goto err; | |
2424 | } | |
2425 | ||
0b4c91c0 | 2426 | enc_ticket.data = (char *)p; |
2a1ef754 RL |
2427 | p+=enc_ticket.length; |
2428 | ||
2429 | n2s(p,i); | |
2430 | authenticator.length = i; | |
9e5790ce | 2431 | |
ef236ec3 | 2432 | if (n < (long)(enc_ticket.length + authenticator.length + 6)) |
9e5790ce NL |
2433 | { |
2434 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2435 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2436 | goto err; | |
2437 | } | |
2438 | ||
0b4c91c0 | 2439 | authenticator.data = (char *)p; |
2a1ef754 RL |
2440 | p+=authenticator.length; |
2441 | ||
2442 | n2s(p,i); | |
2443 | enc_pms.length = i; | |
0b4c91c0 | 2444 | enc_pms.data = (char *)p; |
2a1ef754 RL |
2445 | p+=enc_pms.length; |
2446 | ||
c046fffa LJ |
2447 | /* Note that the length is checked again below, |
2448 | ** after decryption | |
2449 | */ | |
dd7ab82e | 2450 | if(enc_pms.length > sizeof pms) |
c046fffa LJ |
2451 | { |
2452 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2453 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2454 | goto err; | |
2455 | } | |
2456 | ||
0858b71b DSH |
2457 | if (n != (long)(enc_ticket.length + authenticator.length + |
2458 | enc_pms.length + 6)) | |
2a1ef754 RL |
2459 | { |
2460 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2461 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2462 | goto err; | |
2463 | } | |
2464 | ||
52b8dad8 | 2465 | if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes, |
2a1ef754 | 2466 | &kssl_err)) != 0) |
52b8dad8 | 2467 | { |
f9b3bff6 | 2468 | #ifdef KSSL_DEBUG |
52b8dad8 BM |
2469 | printf("kssl_sget_tkt rtn %d [%d]\n", |
2470 | krb5rc, kssl_err.reason); | |
2471 | if (kssl_err.text) | |
2472 | printf("kssl_err text= %s\n", kssl_err.text); | |
f9b3bff6 | 2473 | #endif /* KSSL_DEBUG */ |
52b8dad8 BM |
2474 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2475 | kssl_err.reason); | |
2476 | goto err; | |
2477 | } | |
f9b3bff6 | 2478 | |
2a1ef754 RL |
2479 | /* Note: no authenticator is not considered an error, |
2480 | ** but will return authtime == 0. | |
2481 | */ | |
2482 | if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator, | |
2483 | &authtime, &kssl_err)) != 0) | |
2484 | { | |
2485 | #ifdef KSSL_DEBUG | |
52b8dad8 BM |
2486 | printf("kssl_check_authent rtn %d [%d]\n", |
2487 | krb5rc, kssl_err.reason); | |
2488 | if (kssl_err.text) | |
2489 | printf("kssl_err text= %s\n", kssl_err.text); | |
2a1ef754 | 2490 | #endif /* KSSL_DEBUG */ |
52b8dad8 BM |
2491 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2492 | kssl_err.reason); | |
2493 | goto err; | |
2a1ef754 RL |
2494 | } |
2495 | ||
2496 | if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0) | |
2497 | { | |
aa4ce731 | 2498 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, krb5rc); |
52b8dad8 | 2499 | goto err; |
2a1ef754 RL |
2500 | } |
2501 | ||
f9b3bff6 | 2502 | #ifdef KSSL_DEBUG |
52b8dad8 | 2503 | kssl_ctx_show(kssl_ctx); |
f9b3bff6 RL |
2504 | #endif /* KSSL_DEBUG */ |
2505 | ||
2a1ef754 | 2506 | enc = kssl_map_enc(kssl_ctx->enctype); |
52b8dad8 BM |
2507 | if (enc == NULL) |
2508 | goto err; | |
882e8912 | 2509 | |
54a656ef | 2510 | memset(iv, 0, sizeof iv); /* per RFC 1510 */ |
2a1ef754 | 2511 | |
db6a87d8 | 2512 | if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv)) |
acdf4afb RL |
2513 | { |
2514 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2515 | SSL_R_DECRYPTION_FAILED); | |
2516 | goto err; | |
2517 | } | |
2518 | if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl, | |
0b4c91c0 | 2519 | (unsigned char *)enc_pms.data, enc_pms.length)) |
acdf4afb RL |
2520 | { |
2521 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2522 | SSL_R_DECRYPTION_FAILED); | |
2523 | goto err; | |
2524 | } | |
2a1ef754 RL |
2525 | if (outl > SSL_MAX_MASTER_KEY_LENGTH) |
2526 | { | |
2527 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2528 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2529 | goto err; | |
2530 | } | |
581f1c84 | 2531 | if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl)) |
acdf4afb RL |
2532 | { |
2533 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2534 | SSL_R_DECRYPTION_FAILED); | |
2535 | goto err; | |
2536 | } | |
2a1ef754 RL |
2537 | outl += padl; |
2538 | if (outl > SSL_MAX_MASTER_KEY_LENGTH) | |
2539 | { | |
2540 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2541 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2542 | goto err; | |
2543 | } | |
c1ca9d32 | 2544 | if (!((pms[0] == (s->client_version>>8)) && (pms[1] == (s->client_version & 0xff)))) |
cbb92dfa RL |
2545 | { |
2546 | /* The premaster secret must contain the same version number as the | |
2547 | * ClientHello to detect version rollback attacks (strangely, the | |
2548 | * protocol does not offer such protection for DH ciphersuites). | |
2549 | * However, buggy clients exist that send random bytes instead of | |
2550 | * the protocol version. | |
2551 | * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. | |
2552 | * (Perhaps we should have a separate BUG value for the Kerberos cipher) | |
2553 | */ | |
c1ca9d32 | 2554 | if (!(s->options & SSL_OP_TLS_ROLLBACK_BUG)) |
52b8dad8 | 2555 | { |
cbb92dfa RL |
2556 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2557 | SSL_AD_DECODE_ERROR); | |
2558 | goto err; | |
2559 | } | |
2560 | } | |
2561 | ||
2a1ef754 RL |
2562 | EVP_CIPHER_CTX_cleanup(&ciph_ctx); |
2563 | ||
52b8dad8 BM |
2564 | s->session->master_key_length= |
2565 | s->method->ssl3_enc->generate_master_secret(s, | |
2566 | s->session->master_key, pms, outl); | |
2a1ef754 | 2567 | |
52b8dad8 BM |
2568 | if (kssl_ctx->client_princ) |
2569 | { | |
2570 | size_t len = strlen(kssl_ctx->client_princ); | |
2571 | if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH ) | |
2572 | { | |
2573 | s->session->krb5_client_princ_len = len; | |
2574 | memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len); | |
2575 | } | |
2576 | } | |
882e8912 RL |
2577 | |
2578 | ||
52b8dad8 | 2579 | /* Was doing kssl_ctx_free() here, |
2a1ef754 | 2580 | ** but it caused problems for apache. |
52b8dad8 BM |
2581 | ** kssl_ctx = kssl_ctx_free(kssl_ctx); |
2582 | ** if (s->kssl_ctx) s->kssl_ctx = NULL; | |
2583 | */ | |
2584 | } | |
f9b3bff6 | 2585 | else |
bc36ee62 | 2586 | #endif /* OPENSSL_NO_KRB5 */ |
ea262260 BM |
2587 | |
2588 | #ifndef OPENSSL_NO_ECDH | |
52b8dad8 | 2589 | if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) |
ea262260 BM |
2590 | { |
2591 | int ret = 1; | |
968766ca | 2592 | int field_size = 0; |
9dd84053 NL |
2593 | const EC_KEY *tkey; |
2594 | const EC_GROUP *group; | |
2595 | const BIGNUM *priv_key; | |
ea262260 | 2596 | |
52b8dad8 | 2597 | /* initialize structures for server's ECDH key pair */ |
ea262260 BM |
2598 | if ((srvr_ecdh = EC_KEY_new()) == NULL) |
2599 | { | |
52b8dad8 | 2600 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
ea262260 | 2601 | ERR_R_MALLOC_FAILURE); |
52b8dad8 | 2602 | goto err; |
ea262260 BM |
2603 | } |
2604 | ||
2605 | /* Let's get server private key and group information */ | |
52b8dad8 | 2606 | if (alg_k & (SSL_kECDHr|SSL_kECDHe)) |
ea262260 | 2607 | { |
52b8dad8 | 2608 | /* use the certificate */ |
feaaf1db | 2609 | tkey = s->cert->pkeys[SSL_PKEY_ECC].privatekey->pkey.ec; |
ea262260 BM |
2610 | } |
2611 | else | |
2612 | { | |
2613 | /* use the ephermeral values we saved when | |
2614 | * generating the ServerKeyExchange msg. | |
2615 | */ | |
9dd84053 NL |
2616 | tkey = s->s3->tmp.ecdh; |
2617 | } | |
2618 | ||
2619 | group = EC_KEY_get0_group(tkey); | |
2620 | priv_key = EC_KEY_get0_private_key(tkey); | |
2621 | ||
2622 | if (!EC_KEY_set_group(srvr_ecdh, group) || | |
2623 | !EC_KEY_set_private_key(srvr_ecdh, priv_key)) | |
2624 | { | |
2625 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2626 | ERR_R_EC_LIB); | |
2627 | goto err; | |
ea262260 BM |
2628 | } |
2629 | ||
2630 | /* Let's get client's public key */ | |
9dd84053 | 2631 | if ((clnt_ecpoint = EC_POINT_new(group)) == NULL) |
ea262260 BM |
2632 | { |
2633 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2634 | ERR_R_MALLOC_FAILURE); | |
2635 | goto err; | |
2636 | } | |
2637 | ||
52b8dad8 BM |
2638 | if (n == 0L) |
2639 | { | |
ea262260 BM |
2640 | /* Client Publickey was in Client Certificate */ |
2641 | ||
52b8dad8 | 2642 | if (alg_k & SSL_kEECDH) |
ea262260 BM |
2643 | { |
2644 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2645 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); | |
2646 | goto f_err; | |
2647 | } | |
52b8dad8 | 2648 | if (((clnt_pub_pkey=X509_get_pubkey(s->session->peer)) |
ea262260 | 2649 | == NULL) || |
5488bb61 | 2650 | (clnt_pub_pkey->type != EVP_PKEY_EC)) |
52b8dad8 | 2651 | { |
ea262260 BM |
2652 | /* XXX: For now, we do not support client |
2653 | * authentication using ECDH certificates | |
2654 | * so this branch (n == 0L) of the code is | |
2655 | * never executed. When that support is | |
2656 | * added, we ought to ensure the key | |
2657 | * received in the certificate is | |
2658 | * authorized for key agreement. | |
2659 | * ECDH_compute_key implicitly checks that | |
2660 | * the two ECDH shares are for the same | |
2661 | * group. | |
2662 | */ | |
52b8dad8 BM |
2663 | al=SSL_AD_HANDSHAKE_FAILURE; |
2664 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
ea262260 | 2665 | SSL_R_UNABLE_TO_DECODE_ECDH_CERTS); |
52b8dad8 BM |
2666 | goto f_err; |
2667 | } | |
ea262260 | 2668 | |
8c5a2bd6 NL |
2669 | if (EC_POINT_copy(clnt_ecpoint, |
2670 | EC_KEY_get0_public_key(clnt_pub_pkey->pkey.ec)) == 0) | |
2671 | { | |
2672 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2673 | ERR_R_EC_LIB); | |
2674 | goto err; | |
2675 | } | |
52b8dad8 BM |
2676 | ret = 2; /* Skip certificate verify processing */ |
2677 | } | |
2678 | else | |
2679 | { | |
ea262260 BM |
2680 | /* Get client's public key from encoded point |
2681 | * in the ClientKeyExchange message. | |
2682 | */ | |
2683 | if ((bn_ctx = BN_CTX_new()) == NULL) | |
2684 | { | |
2685 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2686 | ERR_R_MALLOC_FAILURE); | |
2687 | goto err; | |
2688 | } | |
2689 | ||
52b8dad8 BM |
2690 | /* Get encoded point length */ |
2691 | i = *p; | |
ea262260 | 2692 | p += 1; |
e7928282 BM |
2693 | if (n != 1 + i) |
2694 | { | |
2695 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2696 | ERR_R_EC_LIB); | |
2697 | goto err; | |
2698 | } | |
52b8dad8 | 2699 | if (EC_POINT_oct2point(group, |
ea262260 BM |
2700 | clnt_ecpoint, p, i, bn_ctx) == 0) |
2701 | { | |
2702 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2703 | ERR_R_EC_LIB); | |
2704 | goto err; | |
2705 | } | |
52b8dad8 BM |
2706 | /* p is pointing to somewhere in the buffer |
2707 | * currently, so set it to the start | |
2708 | */ | |
2709 | p=(unsigned char *)s->init_buf->data; | |
2710 | } | |
ea262260 BM |
2711 | |
2712 | /* Compute the shared pre-master secret */ | |
9dd84053 | 2713 | field_size = EC_GROUP_get_degree(group); |
968766ca BM |
2714 | if (field_size <= 0) |
2715 | { | |
2716 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2717 | ERR_R_ECDH_LIB); | |
2718 | goto err; | |
2719 | } | |
d56349a2 | 2720 | i = ECDH_compute_key(p, (field_size+7)/8, clnt_ecpoint, srvr_ecdh, NULL); |
52b8dad8 BM |
2721 | if (i <= 0) |
2722 | { | |
2723 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
ea262260 | 2724 | ERR_R_ECDH_LIB); |
52b8dad8 BM |
2725 | goto err; |
2726 | } | |
ea262260 BM |
2727 | |
2728 | EVP_PKEY_free(clnt_pub_pkey); | |
2729 | EC_POINT_free(clnt_ecpoint); | |
4a94003a | 2730 | EC_KEY_free(srvr_ecdh); |
ea262260 | 2731 | BN_CTX_free(bn_ctx); |
21b25ed4 DSH |
2732 | EC_KEY_free(s->s3->tmp.ecdh); |
2733 | s->s3->tmp.ecdh = NULL; | |
ea262260 BM |
2734 | |
2735 | /* Compute the master secret */ | |
52b8dad8 | 2736 | s->session->master_key_length = s->method->ssl3_enc-> \ |
ea262260 BM |
2737 | generate_master_secret(s, s->session->master_key, p, i); |
2738 | ||
52b8dad8 BM |
2739 | OPENSSL_cleanse(p, i); |
2740 | return (ret); | |
ea262260 BM |
2741 | } |
2742 | else | |
ddac1974 NL |
2743 | #endif |
2744 | #ifndef OPENSSL_NO_PSK | |
52b8dad8 | 2745 | if (alg_k & SSL_kPSK) |
ddac1974 NL |
2746 | { |
2747 | unsigned char *t = NULL; | |
2748 | unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; | |
2749 | unsigned int pre_ms_len = 0, psk_len = 0; | |
2750 | int psk_err = 1; | |
2751 | char tmp_id[PSK_MAX_IDENTITY_LEN+1]; | |
2752 | ||
2753 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2754 | ||
2755 | n2s(p,i); | |
2756 | if (n != i+2) | |
2757 | { | |
2758 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2759 | SSL_R_LENGTH_MISMATCH); | |
2760 | goto psk_err; | |
2761 | } | |
2762 | if (i > PSK_MAX_IDENTITY_LEN) | |
2763 | { | |
2764 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2765 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2766 | goto psk_err; | |
2767 | } | |
2768 | if (s->psk_server_callback == NULL) | |
2769 | { | |
2770 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2771 | SSL_R_PSK_NO_SERVER_CB); | |
2772 | goto psk_err; | |
2773 | } | |
2774 | ||
2775 | /* Create guaranteed NULL-terminated identity | |
2776 | * string for the callback */ | |
2777 | memcpy(tmp_id, p, i); | |
2778 | memset(tmp_id+i, 0, PSK_MAX_IDENTITY_LEN+1-i); | |
2779 | psk_len = s->psk_server_callback(s, tmp_id, | |
2780 | psk_or_pre_ms, sizeof(psk_or_pre_ms)); | |
2781 | OPENSSL_cleanse(tmp_id, PSK_MAX_IDENTITY_LEN+1); | |
2782 | ||
2783 | if (psk_len > PSK_MAX_PSK_LEN) | |
2784 | { | |
2785 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2786 | ERR_R_INTERNAL_ERROR); | |
2787 | goto psk_err; | |
2788 | } | |
2789 | else if (psk_len == 0) | |
2790 | { | |
2791 | /* PSK related to the given identity not found */ | |
2792 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2793 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
2794 | al=SSL_AD_UNKNOWN_PSK_IDENTITY; | |
2795 | goto psk_err; | |
2796 | } | |
2797 | ||
2798 | /* create PSK pre_master_secret */ | |
2799 | pre_ms_len=2+psk_len+2+psk_len; | |
2800 | t = psk_or_pre_ms; | |
2801 | memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); | |
2802 | s2n(psk_len, t); | |
2803 | memset(t, 0, psk_len); | |
2804 | t+=psk_len; | |
2805 | s2n(psk_len, t); | |
2806 | ||
2807 | if (s->session->psk_identity != NULL) | |
2808 | OPENSSL_free(s->session->psk_identity); | |
07ef6129 | 2809 | s->session->psk_identity = BUF_strdup((char *)p); |
ddac1974 NL |
2810 | if (s->session->psk_identity == NULL) |
2811 | { | |
2812 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2813 | ERR_R_MALLOC_FAILURE); | |
2814 | goto psk_err; | |
2815 | } | |
2816 | ||
2817 | if (s->session->psk_identity_hint != NULL) | |
2818 | OPENSSL_free(s->session->psk_identity_hint); | |
2819 | s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); | |
2820 | if (s->ctx->psk_identity_hint != NULL && | |
2821 | s->session->psk_identity_hint == NULL) | |
2822 | { | |
2823 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2824 | ERR_R_MALLOC_FAILURE); | |
2825 | goto psk_err; | |
2826 | } | |
2827 | ||
2828 | s->session->master_key_length= | |
2829 | s->method->ssl3_enc->generate_master_secret(s, | |
2830 | s->session->master_key, psk_or_pre_ms, pre_ms_len); | |
2831 | psk_err = 0; | |
2832 | psk_err: | |
2833 | OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); | |
52b8dad8 BM |
2834 | if (psk_err != 0) |
2835 | goto f_err; | |
ddac1974 NL |
2836 | } |
2837 | else | |
ea262260 | 2838 | #endif |
edc032b5 BL |
2839 | #ifndef OPENSSL_NO_SRP |
2840 | if (alg_k & SSL_kSRP) | |
2841 | { | |
2842 | int param_len; | |
2843 | ||
2844 | n2s(p,i); | |
2845 | param_len=i+2; | |
2846 | if (param_len > n) | |
2847 | { | |
2848 | al=SSL_AD_DECODE_ERROR; | |
23bc7961 | 2849 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_SRP_A_LENGTH); |
edc032b5 BL |
2850 | goto f_err; |
2851 | } | |
2852 | if (!(s->srp_ctx.A=BN_bin2bn(p,i,NULL))) | |
2853 | { | |
23bc7961 | 2854 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_BN_LIB); |
edc032b5 BL |
2855 | goto err; |
2856 | } | |
2857 | if (s->session->srp_username != NULL) | |
2858 | OPENSSL_free(s->session->srp_username); | |
2859 | s->session->srp_username = BUF_strdup(s->srp_ctx.login); | |
2860 | if (s->session->srp_username == NULL) | |
2861 | { | |
2862 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2863 | ERR_R_MALLOC_FAILURE); | |
2864 | goto err; | |
2865 | } | |
2866 | ||
2867 | if ((s->session->master_key_length = SRP_generate_server_master_secret(s,s->session->master_key))<0) | |
2868 | { | |
23bc7961 | 2869 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); |
edc032b5 BL |
2870 | goto err; |
2871 | } | |
2872 | ||
2873 | p+=i; | |
2874 | } | |
2875 | else | |
2876 | #endif /* OPENSSL_NO_SRP */ | |
0e1dba93 | 2877 | if (alg_k & SSL_kGOST) |
f0288f05 DSH |
2878 | { |
2879 | int ret = 0; | |
0e1dba93 | 2880 | EVP_PKEY_CTX *pkey_ctx; |
e827b587 | 2881 | EVP_PKEY *client_pub_pkey = NULL, *pk = NULL; |
f0288f05 | 2882 | unsigned char premaster_secret[32], *start; |
e827b587 DSH |
2883 | size_t outlen=32, inlen; |
2884 | unsigned long alg_a; | |
0e1dba93 | 2885 | |
f0288f05 | 2886 | /* Get our certificate private key*/ |
e827b587 DSH |
2887 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; |
2888 | if (alg_a & SSL_aGOST94) | |
2889 | pk = s->cert->pkeys[SSL_PKEY_GOST94].privatekey; | |
2890 | else if (alg_a & SSL_aGOST01) | |
2891 | pk = s->cert->pkeys[SSL_PKEY_GOST01].privatekey; | |
2892 | ||
2893 | pkey_ctx = EVP_PKEY_CTX_new(pk,NULL); | |
0e1dba93 | 2894 | EVP_PKEY_decrypt_init(pkey_ctx); |
f0288f05 DSH |
2895 | /* If client certificate is present and is of the same type, maybe |
2896 | * use it for key exchange. Don't mind errors from | |
2897 | * EVP_PKEY_derive_set_peer, because it is completely valid to use | |
2898 | * a client certificate for authorization only. */ | |
2899 | client_pub_pkey = X509_get_pubkey(s->session->peer); | |
2900 | if (client_pub_pkey) | |
2901 | { | |
2902 | if (EVP_PKEY_derive_set_peer(pkey_ctx, client_pub_pkey) <= 0) | |
2903 | ERR_clear_error(); | |
2904 | } | |
0e1dba93 | 2905 | /* Decrypt session key */ |
f0288f05 | 2906 | if ((*p!=( V_ASN1_SEQUENCE| V_ASN1_CONSTRUCTED))) |
0e1dba93 DSH |
2907 | { |
2908 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED); | |
f0288f05 DSH |
2909 | goto gerr; |
2910 | } | |
2911 | if (p[1] == 0x81) | |
2912 | { | |
2913 | start = p+3; | |
2914 | inlen = p[2]; | |
2915 | } | |
2916 | else if (p[1] < 0x80) | |
2917 | { | |
2918 | start = p+2; | |
2919 | inlen = p[1]; | |
2920 | } | |
2921 | else | |
2922 | { | |
2923 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED); | |
2924 | goto gerr; | |
2925 | } | |
2926 | if (EVP_PKEY_decrypt(pkey_ctx,premaster_secret,&outlen,start,inlen) <=0) | |
0e1dba93 DSH |
2927 | |
2928 | { | |
2929 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED); | |
f0288f05 | 2930 | goto gerr; |
0e1dba93 DSH |
2931 | } |
2932 | /* Generate master secret */ | |
0e1dba93 DSH |
2933 | s->session->master_key_length= |
2934 | s->method->ssl3_enc->generate_master_secret(s, | |
2935 | s->session->master_key,premaster_secret,32); | |
f0288f05 DSH |
2936 | /* Check if pubkey from client certificate was used */ |
2937 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) | |
2938 | ret = 2; | |
2939 | else | |
2940 | ret = 1; | |
2941 | gerr: | |
2942 | EVP_PKEY_free(client_pub_pkey); | |
2943 | EVP_PKEY_CTX_free(pkey_ctx); | |
2944 | if (ret) | |
2945 | return ret; | |
2946 | else | |
2947 | goto err; | |
2948 | } | |
0e1dba93 | 2949 | else |
d02b48c6 | 2950 | { |
58964a49 | 2951 | al=SSL_AD_HANDSHAKE_FAILURE; |
2a1ef754 RL |
2952 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2953 | SSL_R_UNKNOWN_CIPHER_TYPE); | |
d02b48c6 RE |
2954 | goto f_err; |
2955 | } | |
2956 | ||
2957 | return(1); | |
2958 | f_err: | |
2959 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
edc032b5 | 2960 | #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_ECDH) || defined(OPENSSL_NO_SRP) |
d02b48c6 | 2961 | err: |
ea262260 | 2962 | #endif |
d020e701 | 2963 | #ifndef OPENSSL_NO_ECDH |
ea262260 BM |
2964 | EVP_PKEY_free(clnt_pub_pkey); |
2965 | EC_POINT_free(clnt_ecpoint); | |
2966 | if (srvr_ecdh != NULL) | |
ea262260 | 2967 | EC_KEY_free(srvr_ecdh); |
ea262260 | 2968 | BN_CTX_free(bn_ctx); |
58964a49 | 2969 | #endif |
d02b48c6 RE |
2970 | return(-1); |
2971 | } | |
2972 | ||
36d16f8e | 2973 | int ssl3_get_cert_verify(SSL *s) |
d02b48c6 RE |
2974 | { |
2975 | EVP_PKEY *pkey=NULL; | |
2976 | unsigned char *p; | |
2977 | int al,ok,ret=0; | |
2978 | long n; | |
2979 | int type=0,i,j; | |
2980 | X509 *peer; | |
f37f20ff DSH |
2981 | const EVP_MD *md = NULL; |
2982 | EVP_MD_CTX mctx; | |
2983 | EVP_MD_CTX_init(&mctx); | |
d02b48c6 | 2984 | |
36d16f8e | 2985 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
2986 | SSL3_ST_SR_CERT_VRFY_A, |
2987 | SSL3_ST_SR_CERT_VRFY_B, | |
2988 | -1, | |
59e68615 | 2989 | 516, /* Enough for 4096 bit RSA key with TLS v1.2 */ |
d02b48c6 RE |
2990 | &ok); |
2991 | ||
2992 | if (!ok) return((int)n); | |
2993 | ||
2994 | if (s->session->peer != NULL) | |
2995 | { | |
2996 | peer=s->session->peer; | |
2997 | pkey=X509_get_pubkey(peer); | |
2998 | type=X509_certificate_type(peer,pkey); | |
2999 | } | |
3000 | else | |
3001 | { | |
3002 | peer=NULL; | |
3003 | pkey=NULL; | |
3004 | } | |
3005 | ||
3006 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY) | |
3007 | { | |
3008 | s->s3->tmp.reuse_message=1; | |
3b1fb1a0 | 3009 | if ((peer != NULL) && (type & EVP_PKT_SIGN)) |
d02b48c6 | 3010 | { |
58964a49 | 3011 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 | 3012 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE); |
d02b48c6 RE |
3013 | goto f_err; |
3014 | } | |
3015 | ret=1; | |
3016 | goto end; | |
3017 | } | |
3018 | ||
3019 | if (peer == NULL) | |
3020 | { | |
3021 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED); | |
58964a49 | 3022 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
3023 | goto f_err; |
3024 | } | |
3025 | ||
3026 | if (!(type & EVP_PKT_SIGN)) | |
3027 | { | |
3028 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE); | |
58964a49 | 3029 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
3030 | goto f_err; |
3031 | } | |
3032 | ||
3033 | if (s->s3->change_cipher_spec) | |
3034 | { | |
3035 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY); | |
58964a49 | 3036 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
3037 | goto f_err; |
3038 | } | |
3039 | ||
3040 | /* we now have a signature that we need to verify */ | |
48948d53 | 3041 | p=(unsigned char *)s->init_msg; |
0e1dba93 DSH |
3042 | /* Check for broken implementations of GOST ciphersuites */ |
3043 | /* If key is GOST and n is exactly 64, it is bare | |
3044 | * signature without length field */ | |
3045 | if (n==64 && (pkey->type==NID_id_GostR3410_94 || | |
3046 | pkey->type == NID_id_GostR3410_2001) ) | |
d02b48c6 | 3047 | { |
0e1dba93 DSH |
3048 | i=64; |
3049 | } | |
3050 | else | |
3051 | { | |
238b6361 | 3052 | if (TLS1_get_version(s) >= TLS1_2_VERSION) |
f37f20ff DSH |
3053 | { |
3054 | int sigalg = tls12_get_sigid(pkey); | |
3055 | /* Should never happen */ | |
3056 | if (sigalg == -1) | |
3057 | { | |
3058 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR); | |
3059 | al=SSL_AD_INTERNAL_ERROR; | |
3060 | goto f_err; | |
3061 | } | |
3062 | /* Check key type is consistent with signature */ | |
3063 | if (sigalg != (int)p[1]) | |
3064 | { | |
3065 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_TYPE); | |
3066 | al=SSL_AD_DECODE_ERROR; | |
3067 | goto f_err; | |
3068 | } | |
3069 | md = tls12_get_hash(p[0]); | |
3070 | if (md == NULL) | |
3071 | { | |
4f8f8bf3 | 3072 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_UNKNOWN_DIGEST); |
f37f20ff DSH |
3073 | al=SSL_AD_DECODE_ERROR; |
3074 | goto f_err; | |
3075 | } | |
3076 | #ifdef SSL_DEBUG | |
3077 | fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); | |
3078 | #endif | |
3079 | p += 2; | |
3080 | n -= 2; | |
3081 | } | |
0e1dba93 DSH |
3082 | n2s(p,i); |
3083 | n-=2; | |
3084 | if (i > n) | |
3085 | { | |
3086 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH); | |
3087 | al=SSL_AD_DECODE_ERROR; | |
3088 | goto f_err; | |
3089 | } | |
3090 | } | |
d02b48c6 RE |
3091 | j=EVP_PKEY_size(pkey); |
3092 | if ((i > j) || (n > j) || (n <= 0)) | |
3093 | { | |
3094 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE); | |
58964a49 | 3095 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
3096 | goto f_err; |
3097 | } | |
3098 | ||
238b6361 | 3099 | if (TLS1_get_version(s) >= TLS1_2_VERSION) |
f37f20ff DSH |
3100 | { |
3101 | long hdatalen = 0; | |
3102 | void *hdata; | |
3103 | hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata); | |
3104 | if (hdatalen <= 0) | |
3105 | { | |
3106 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, ERR_R_INTERNAL_ERROR); | |
3107 | al=SSL_AD_INTERNAL_ERROR; | |
3108 | goto f_err; | |
3109 | } | |
3110 | #ifdef SSL_DEBUG | |
3111 | fprintf(stderr, "Using TLS 1.2 with client verify alg %s\n", | |
3112 | EVP_MD_name(md)); | |
3113 | #endif | |
3114 | if (!EVP_VerifyInit_ex(&mctx, md, NULL) | |
3115 | || !EVP_VerifyUpdate(&mctx, hdata, hdatalen)) | |
3116 | { | |
3117 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, ERR_R_EVP_LIB); | |
3118 | al=SSL_AD_INTERNAL_ERROR; | |
3119 | goto f_err; | |
3120 | } | |
3121 | ||
3122 | if (EVP_VerifyFinal(&mctx, p , i, pkey) <= 0) | |
3123 | { | |
3124 | al=SSL_AD_DECRYPT_ERROR; | |
3125 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_SIGNATURE); | |
3126 | goto f_err; | |
3127 | } | |
3128 | } | |
3129 | else | |
bc36ee62 | 3130 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
3131 | if (pkey->type == EVP_PKEY_RSA) |
3132 | { | |
f2d9a32c | 3133 | i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md, |
1c80019a DSH |
3134 | MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i, |
3135 | pkey->pkey.rsa); | |
d02b48c6 RE |
3136 | if (i < 0) |
3137 | { | |
58964a49 | 3138 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
3139 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT); |
3140 | goto f_err; | |
3141 | } | |
1c80019a | 3142 | if (i == 0) |
d02b48c6 | 3143 | { |
58964a49 | 3144 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
3145 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE); |
3146 | goto f_err; | |
3147 | } | |
3148 | } | |
3149 | else | |
3150 | #endif | |
bc36ee62 | 3151 | #ifndef OPENSSL_NO_DSA |
d02b48c6 RE |
3152 | if (pkey->type == EVP_PKEY_DSA) |
3153 | { | |
58964a49 | 3154 | j=DSA_verify(pkey->save_type, |
f2d9a32c | 3155 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]), |
d02b48c6 RE |
3156 | SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa); |
3157 | if (j <= 0) | |
3158 | { | |
3159 | /* bad signature */ | |
58964a49 | 3160 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
3161 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE); |
3162 | goto f_err; | |
3163 | } | |
3164 | } | |
3165 | else | |
ea262260 BM |
3166 | #endif |
3167 | #ifndef OPENSSL_NO_ECDSA | |
5488bb61 | 3168 | if (pkey->type == EVP_PKEY_EC) |
ea262260 BM |
3169 | { |
3170 | j=ECDSA_verify(pkey->save_type, | |
3171 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]), | |
9dd84053 | 3172 | SHA_DIGEST_LENGTH,p,i,pkey->pkey.ec); |
ea262260 BM |
3173 | if (j <= 0) |
3174 | { | |
3175 | /* bad signature */ | |
3176 | al=SSL_AD_DECRYPT_ERROR; | |
3177 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, | |
3178 | SSL_R_BAD_ECDSA_SIGNATURE); | |
3179 | goto f_err; | |
3180 | } | |
3181 | } | |
3182 | else | |
d02b48c6 | 3183 | #endif |
0e1dba93 DSH |
3184 | if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) |
3185 | { unsigned char signature[64]; | |
3186 | int idx; | |
3187 | EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new(pkey,NULL); | |
3188 | EVP_PKEY_verify_init(pctx); | |
3189 | if (i!=64) { | |
3190 | fprintf(stderr,"GOST signature length is %d",i); | |
3191 | } | |
3192 | for (idx=0;idx<64;idx++) { | |
3193 | signature[63-idx]=p[idx]; | |
3194 | } | |
3195 | j=EVP_PKEY_verify(pctx,signature,64,s->s3->tmp.cert_verify_md,32); | |
3196 | EVP_PKEY_CTX_free(pctx); | |
3197 | if (j<=0) | |
3198 | { | |
3199 | al=SSL_AD_DECRYPT_ERROR; | |
3200 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, | |
3201 | SSL_R_BAD_ECDSA_SIGNATURE); | |
3202 | goto f_err; | |
3203 | } | |
3204 | } | |
3205 | else | |
d02b48c6 | 3206 | { |
5277d7cb | 3207 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR); |
58964a49 | 3208 | al=SSL_AD_UNSUPPORTED_CERTIFICATE; |
d02b48c6 RE |
3209 | goto f_err; |
3210 | } | |
3211 | ||
3212 | ||
3213 | ret=1; | |
3214 | if (0) | |
3215 | { | |
3216 | f_err: | |
3217 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
3218 | } | |
3219 | end: | |
f37f20ff DSH |
3220 | if (s->s3->handshake_buffer) |
3221 | { | |
3222 | BIO_free(s->s3->handshake_buffer); | |
3223 | s->s3->handshake_buffer = NULL; | |
3224 | s->s3->flags &= ~TLS1_FLAGS_KEEP_HANDSHAKE; | |
3225 | } | |
3226 | EVP_MD_CTX_cleanup(&mctx); | |
a8236c8c | 3227 | EVP_PKEY_free(pkey); |
d02b48c6 RE |
3228 | return(ret); |
3229 | } | |
3230 | ||
36d16f8e | 3231 | int ssl3_get_client_certificate(SSL *s) |
d02b48c6 RE |
3232 | { |
3233 | int i,ok,al,ret= -1; | |
3234 | X509 *x=NULL; | |
3235 | unsigned long l,nc,llen,n; | |
875a644a RL |
3236 | const unsigned char *p,*q; |
3237 | unsigned char *d; | |
f73e07cf | 3238 | STACK_OF(X509) *sk=NULL; |
d02b48c6 | 3239 | |
36d16f8e | 3240 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
3241 | SSL3_ST_SR_CERT_A, |
3242 | SSL3_ST_SR_CERT_B, | |
3243 | -1, | |
c0f5dd07 | 3244 | s->max_cert_list, |
d02b48c6 RE |
3245 | &ok); |
3246 | ||
3247 | if (!ok) return((int)n); | |
3248 | ||
3249 | if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE) | |
3250 | { | |
3251 | if ( (s->verify_mode & SSL_VERIFY_PEER) && | |
3252 | (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) | |
3253 | { | |
3254 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
58964a49 RE |
3255 | al=SSL_AD_HANDSHAKE_FAILURE; |
3256 | goto f_err; | |
3257 | } | |
47134b78 | 3258 | /* If tls asked for a client cert, the client must return a 0 list */ |
58964a49 RE |
3259 | if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request) |
3260 | { | |
3261 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST); | |
3262 | al=SSL_AD_UNEXPECTED_MESSAGE; | |
d02b48c6 RE |
3263 | goto f_err; |
3264 | } | |
3265 | s->s3->tmp.reuse_message=1; | |
3266 | return(1); | |
3267 | } | |
3268 | ||
3269 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) | |
3270 | { | |
58964a49 | 3271 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
3272 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE); |
3273 | goto f_err; | |
3274 | } | |
875a644a | 3275 | p=d=(unsigned char *)s->init_msg; |
d02b48c6 | 3276 | |
f73e07cf | 3277 | if ((sk=sk_X509_new_null()) == NULL) |
d02b48c6 RE |
3278 | { |
3279 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
3280 | goto err; | |
3281 | } | |
3282 | ||
3283 | n2l3(p,llen); | |
3284 | if (llen+3 != n) | |
3285 | { | |
58964a49 | 3286 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
3287 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH); |
3288 | goto f_err; | |
3289 | } | |
3290 | for (nc=0; nc<llen; ) | |
3291 | { | |
3292 | n2l3(p,l); | |
3293 | if ((l+nc+3) > llen) | |
3294 | { | |
58964a49 | 3295 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
3296 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); |
3297 | goto f_err; | |
3298 | } | |
3299 | ||
3300 | q=p; | |
3301 | x=d2i_X509(NULL,&p,l); | |
3302 | if (x == NULL) | |
3303 | { | |
3304 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB); | |
3305 | goto err; | |
3306 | } | |
3307 | if (p != (q+l)) | |
3308 | { | |
58964a49 | 3309 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
3310 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); |
3311 | goto f_err; | |
3312 | } | |
f73e07cf | 3313 | if (!sk_X509_push(sk,x)) |
d02b48c6 RE |
3314 | { |
3315 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
3316 | goto err; | |
3317 | } | |
3318 | x=NULL; | |
3319 | nc+=l+3; | |
3320 | } | |
3321 | ||
f73e07cf | 3322 | if (sk_X509_num(sk) <= 0) |
d02b48c6 | 3323 | { |
58964a49 RE |
3324 | /* TLS does not mind 0 certs returned */ |
3325 | if (s->version == SSL3_VERSION) | |
3326 | { | |
3327 | al=SSL_AD_HANDSHAKE_FAILURE; | |
3328 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED); | |
3329 | goto f_err; | |
3330 | } | |
3331 | /* Fail for TLS only if we required a certificate */ | |
3332 | else if ((s->verify_mode & SSL_VERIFY_PEER) && | |
3333 | (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) | |
3334 | { | |
3335 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
3336 | al=SSL_AD_HANDSHAKE_FAILURE; | |
3337 | goto f_err; | |
3338 | } | |
f37f20ff DSH |
3339 | /* No client certificate so digest cached records */ |
3340 | if (s->s3->handshake_buffer && !ssl3_digest_cached_records(s)) | |
3341 | { | |
3342 | al=SSL_AD_INTERNAL_ERROR; | |
3343 | goto f_err; | |
3344 | } | |
d02b48c6 | 3345 | } |
58964a49 | 3346 | else |
d02b48c6 | 3347 | { |
58964a49 | 3348 | i=ssl_verify_cert_chain(s,sk); |
bab53405 | 3349 | if (i <= 0) |
58964a49 RE |
3350 | { |
3351 | al=ssl_verify_alarm_type(s->verify_result); | |
3352 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED); | |
3353 | goto f_err; | |
3354 | } | |
d02b48c6 RE |
3355 | } |
3356 | ||
b56bce4f | 3357 | if (s->session->peer != NULL) /* This should not be needed */ |
d02b48c6 | 3358 | X509_free(s->session->peer); |
f73e07cf | 3359 | s->session->peer=sk_X509_shift(sk); |
b1fe6ca1 | 3360 | s->session->verify_result = s->verify_result; |
8051996a | 3361 | |
b56bce4f BM |
3362 | /* With the current implementation, sess_cert will always be NULL |
3363 | * when we arrive here. */ | |
3364 | if (s->session->sess_cert == NULL) | |
3365 | { | |
3366 | s->session->sess_cert = ssl_sess_cert_new(); | |
3367 | if (s->session->sess_cert == NULL) | |
3368 | { | |
3369 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE); | |
3370 | goto err; | |
3371 | } | |
3372 | } | |
3373 | if (s->session->sess_cert->cert_chain != NULL) | |
3374 | sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free); | |
9d5cceac | 3375 | s->session->sess_cert->cert_chain=sk; |
98e04f9e BM |
3376 | /* Inconsistency alert: cert_chain does *not* include the |
3377 | * peer's own certificate, while we do include it in s3_clnt.c */ | |
8051996a | 3378 | |
b4cadc6e | 3379 | sk=NULL; |
d02b48c6 RE |
3380 | |
3381 | ret=1; | |
3382 | if (0) | |
3383 | { | |
3384 | f_err: | |
3385 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
3386 | } | |
3387 | err: | |
3388 | if (x != NULL) X509_free(x); | |
f73e07cf | 3389 | if (sk != NULL) sk_X509_pop_free(sk,X509_free); |
d02b48c6 RE |
3390 | return(ret); |
3391 | } | |
3392 | ||
6b691a5c | 3393 | int ssl3_send_server_certificate(SSL *s) |
d02b48c6 RE |
3394 | { |
3395 | unsigned long l; | |
c526ed41 | 3396 | CERT_PKEY *cpk; |
d02b48c6 RE |
3397 | |
3398 | if (s->state == SSL3_ST_SW_CERT_A) | |
3399 | { | |
c526ed41 DSH |
3400 | cpk=ssl_get_server_send_pkey(s); |
3401 | if (cpk == NULL) | |
52b8dad8 BM |
3402 | { |
3403 | /* VRS: allow null cert if auth == KRB5 */ | |
3404 | if ((s->s3->tmp.new_cipher->algorithm_auth != SSL_aKRB5) || | |
3405 | (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5)) | |
3406 | { | |
3407 | SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR); | |
3408 | return(0); | |
3409 | } | |
d02b48c6 RE |
3410 | } |
3411 | ||
c526ed41 | 3412 | l=ssl3_output_cert_chain(s,cpk); |
d02b48c6 RE |
3413 | s->state=SSL3_ST_SW_CERT_B; |
3414 | s->init_num=(int)l; | |
3415 | s->init_off=0; | |
3416 | } | |
3417 | ||
3418 | /* SSL3_ST_SW_CERT_B */ | |
3419 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
3420 | } | |
c519e89f | 3421 | |
ddd3a617 | 3422 | #ifndef OPENSSL_NO_TLSEXT |
c519e89f | 3423 | /* send a new session ticket (not necessarily for a new session) */ |
6434abbf DSH |
3424 | int ssl3_send_newsession_ticket(SSL *s) |
3425 | { | |
3426 | if (s->state == SSL3_ST_SW_SESSION_TICKET_A) | |
3427 | { | |
3428 | unsigned char *p, *senc, *macstart; | |
c519e89f BM |
3429 | const unsigned char *const_p; |
3430 | int len, slen_full, slen; | |
3431 | SSL_SESSION *sess; | |
6434abbf DSH |
3432 | unsigned int hlen; |
3433 | EVP_CIPHER_CTX ctx; | |
3434 | HMAC_CTX hctx; | |
661dc143 | 3435 | SSL_CTX *tctx = s->initial_ctx; |
8a2062fe DSH |
3436 | unsigned char iv[EVP_MAX_IV_LENGTH]; |
3437 | unsigned char key_name[16]; | |
6434abbf DSH |
3438 | |
3439 | /* get session encoding length */ | |
c519e89f | 3440 | slen_full = i2d_SSL_SESSION(s->session, NULL); |
6434abbf DSH |
3441 | /* Some length values are 16 bits, so forget it if session is |
3442 | * too long | |
3443 | */ | |
c519e89f BM |
3444 | if (slen_full > 0xFF00) |
3445 | return -1; | |
3446 | senc = OPENSSL_malloc(slen_full); | |
3447 | if (!senc) | |
3448 | return -1; | |
3449 | p = senc; | |
3450 | i2d_SSL_SESSION(s->session, &p); | |
3451 | ||
3452 | /* create a fresh copy (not shared with other threads) to clean up */ | |
3453 | const_p = senc; | |
3454 | sess = d2i_SSL_SESSION(NULL, &const_p, slen_full); | |
3455 | if (sess == NULL) | |
3456 | { | |
3457 | OPENSSL_free(senc); | |
6434abbf | 3458 | return -1; |
c519e89f BM |
3459 | } |
3460 | sess->session_id_length = 0; /* ID is irrelevant for the ticket */ | |
3461 | ||
3462 | slen = i2d_SSL_SESSION(sess, NULL); | |
3463 | if (slen > slen_full) /* shouldn't ever happen */ | |
3464 | { | |
3465 | OPENSSL_free(senc); | |
3466 | return -1; | |
3467 | } | |
3468 | p = senc; | |
3469 | i2d_SSL_SESSION(sess, &p); | |
3470 | SSL_SESSION_free(sess); | |
3471 | ||
6434abbf DSH |
3472 | /* Grow buffer if need be: the length calculation is as |
3473 | * follows 1 (size of message name) + 3 (message length | |
3474 | * bytes) + 4 (ticket lifetime hint) + 2 (ticket length) + | |
3475 | * 16 (key name) + max_iv_len (iv length) + | |
3476 | * session_length + max_enc_block_size (max encrypted session | |
3477 | * length) + max_md_size (HMAC). | |
3478 | */ | |
3479 | if (!BUF_MEM_grow(s->init_buf, | |
3480 | 26 + EVP_MAX_IV_LENGTH + EVP_MAX_BLOCK_LENGTH + | |
3481 | EVP_MAX_MD_SIZE + slen)) | |
3482 | return -1; | |
6434abbf DSH |
3483 | |
3484 | p=(unsigned char *)s->init_buf->data; | |
3485 | /* do the header */ | |
3486 | *(p++)=SSL3_MT_NEWSESSION_TICKET; | |
3487 | /* Skip message length for now */ | |
3488 | p += 3; | |
8a2062fe DSH |
3489 | EVP_CIPHER_CTX_init(&ctx); |
3490 | HMAC_CTX_init(&hctx); | |
3491 | /* Initialize HMAC and cipher contexts. If callback present | |
3492 | * it does all the work otherwise use generated values | |
3493 | * from parent ctx. | |
3494 | */ | |
661dc143 | 3495 | if (tctx->tlsext_ticket_key_cb) |
8a2062fe | 3496 | { |
661dc143 | 3497 | if (tctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx, |
8a2062fe DSH |
3498 | &hctx, 1) < 0) |
3499 | { | |
3500 | OPENSSL_free(senc); | |
3501 | return -1; | |
3502 | } | |
3503 | } | |
3504 | else | |
3505 | { | |
3506 | RAND_pseudo_bytes(iv, 16); | |
3507 | EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL, | |
661dc143 DSH |
3508 | tctx->tlsext_tick_aes_key, iv); |
3509 | HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16, | |
8a2062fe | 3510 | tlsext_tick_md(), NULL); |
661dc143 | 3511 | memcpy(key_name, tctx->tlsext_tick_key_name, 16); |
8a2062fe | 3512 | } |
c519e89f BM |
3513 | |
3514 | /* Ticket lifetime hint (advisory only): | |
3515 | * We leave this unspecified for resumed session (for simplicity), | |
3516 | * and guess that tickets for new sessions will live as long | |
3517 | * as their sessions. */ | |
3518 | l2n(s->hit ? 0 : s->session->timeout, p); | |
3519 | ||
6434abbf DSH |
3520 | /* Skip ticket length for now */ |
3521 | p += 2; | |
3522 | /* Output key name */ | |
3523 | macstart = p; | |
8a2062fe | 3524 | memcpy(p, key_name, 16); |
6434abbf | 3525 | p += 16; |
8a2062fe DSH |
3526 | /* output IV */ |
3527 | memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx)); | |
3528 | p += EVP_CIPHER_CTX_iv_length(&ctx); | |
6434abbf | 3529 | /* Encrypt session data */ |
43982224 | 3530 | EVP_EncryptUpdate(&ctx, p, &len, senc, slen); |
6434abbf | 3531 | p += len; |
43982224 | 3532 | EVP_EncryptFinal(&ctx, p, &len); |
6434abbf | 3533 | p += len; |
71af26b5 | 3534 | EVP_CIPHER_CTX_cleanup(&ctx); |
43982224 DSH |
3535 | |
3536 | HMAC_Update(&hctx, macstart, p - macstart); | |
3537 | HMAC_Final(&hctx, p, &hlen); | |
6434abbf DSH |
3538 | HMAC_CTX_cleanup(&hctx); |
3539 | ||
3540 | p += hlen; | |
3541 | /* Now write out lengths: p points to end of data written */ | |
3542 | /* Total length */ | |
3543 | len = p - (unsigned char *)s->init_buf->data; | |
3544 | p=(unsigned char *)s->init_buf->data + 1; | |
3545 | l2n3(len - 4, p); /* Message length */ | |
3546 | p += 4; | |
3547 | s2n(len - 10, p); /* Ticket length */ | |
3548 | ||
3549 | /* number of bytes to write */ | |
3550 | s->init_num= len; | |
3551 | s->state=SSL3_ST_SW_SESSION_TICKET_B; | |
3552 | s->init_off=0; | |
3553 | OPENSSL_free(senc); | |
3554 | } | |
3555 | ||
3556 | /* SSL3_ST_SW_SESSION_TICKET_B */ | |
3557 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
3558 | } | |
67c8e7f4 DSH |
3559 | |
3560 | int ssl3_send_cert_status(SSL *s) | |
3561 | { | |
3562 | if (s->state == SSL3_ST_SW_CERT_STATUS_A) | |
3563 | { | |
3564 | unsigned char *p; | |
3565 | /* Grow buffer if need be: the length calculation is as | |
3566 | * follows 1 (message type) + 3 (message length) + | |
3567 | * 1 (ocsp response type) + 3 (ocsp response length) | |
3568 | * + (ocsp response) | |
3569 | */ | |
3570 | if (!BUF_MEM_grow(s->init_buf, 8 + s->tlsext_ocsp_resplen)) | |
3571 | return -1; | |
3572 | ||
3573 | p=(unsigned char *)s->init_buf->data; | |
3574 | ||
3575 | /* do the header */ | |
3576 | *(p++)=SSL3_MT_CERTIFICATE_STATUS; | |
3577 | /* message length */ | |
3578 | l2n3(s->tlsext_ocsp_resplen + 4, p); | |
3579 | /* status type */ | |
3580 | *(p++)= s->tlsext_status_type; | |
3581 | /* length of OCSP response */ | |
3582 | l2n3(s->tlsext_ocsp_resplen, p); | |
3583 | /* actual response */ | |
3584 | memcpy(p, s->tlsext_ocsp_resp, s->tlsext_ocsp_resplen); | |
3585 | /* number of bytes to write */ | |
3586 | s->init_num = 8 + s->tlsext_ocsp_resplen; | |
3587 | s->state=SSL3_ST_SW_CERT_STATUS_B; | |
3588 | s->init_off = 0; | |
3589 | } | |
3590 | ||
3591 | /* SSL3_ST_SW_CERT_STATUS_B */ | |
3592 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
3593 | } | |
ee2ffc27 | 3594 | |
71fa4513 | 3595 | # ifndef OPENSSL_NO_NEXTPROTONEG |
ee2ffc27 BL |
3596 | /* ssl3_get_next_proto reads a Next Protocol Negotiation handshake message. It |
3597 | * sets the next_proto member in s if found */ | |
3598 | int ssl3_get_next_proto(SSL *s) | |
3599 | { | |
3600 | int ok; | |
5df2a249 | 3601 | int proto_len, padding_len; |
ee2ffc27 BL |
3602 | long n; |
3603 | const unsigned char *p; | |
3604 | ||
3605 | /* Clients cannot send a NextProtocol message if we didn't see the | |
3606 | * extension in their ClientHello */ | |
3607 | if (!s->s3->next_proto_neg_seen) | |
3608 | { | |
3609 | SSLerr(SSL_F_SSL3_GET_NEXT_PROTO,SSL_R_GOT_NEXT_PROTO_WITHOUT_EXTENSION); | |
3610 | return -1; | |
3611 | } | |
3612 | ||
3613 | n=s->method->ssl_get_message(s, | |
3614 | SSL3_ST_SR_NEXT_PROTO_A, | |
3615 | SSL3_ST_SR_NEXT_PROTO_B, | |
3616 | SSL3_MT_NEXT_PROTO, | |
bf48836c | 3617 | 514, /* See the payload format below */ |
ee2ffc27 BL |
3618 | &ok); |
3619 | ||
3620 | if (!ok) | |
3621 | return((int)n); | |
3622 | ||
3623 | /* s->state doesn't reflect whether ChangeCipherSpec has been received | |
3624 | * in this handshake, but s->s3->change_cipher_spec does (will be reset | |
3625 | * by ssl3_get_finished). */ | |
3626 | if (!s->s3->change_cipher_spec) | |
3627 | { | |
3628 | SSLerr(SSL_F_SSL3_GET_NEXT_PROTO,SSL_R_GOT_NEXT_PROTO_BEFORE_A_CCS); | |
3629 | return -1; | |
3630 | } | |
3631 | ||
3632 | if (n < 2) | |
3633 | return 0; /* The body must be > 1 bytes long */ | |
3634 | ||
3635 | p=(unsigned char *)s->init_msg; | |
3636 | ||
3637 | /* The payload looks like: | |
3638 | * uint8 proto_len; | |
3639 | * uint8 proto[proto_len]; | |
3640 | * uint8 padding_len; | |
3641 | * uint8 padding[padding_len]; | |
3642 | */ | |
3643 | proto_len = p[0]; | |
3644 | if (proto_len + 2 > s->init_num) | |
3645 | return 0; | |
3646 | padding_len = p[proto_len + 1]; | |
3647 | if (proto_len + padding_len + 2 != s->init_num) | |
3648 | return 0; | |
3649 | ||
3650 | s->next_proto_negotiated = OPENSSL_malloc(proto_len); | |
3651 | if (!s->next_proto_negotiated) | |
3652 | { | |
3653 | SSLerr(SSL_F_SSL3_GET_NEXT_PROTO,ERR_R_MALLOC_FAILURE); | |
3654 | return 0; | |
3655 | } | |
3656 | memcpy(s->next_proto_negotiated, p + 1, proto_len); | |
3657 | s->next_proto_negotiated_len = proto_len; | |
3658 | ||
3659 | return 1; | |
3660 | } | |
3661 | # endif | |
a9e1c50b BL |
3662 | |
3663 | int tls1_send_server_supplemental_data(SSL *s) | |
3664 | { | |
3665 | size_t length = 0; | |
3666 | const unsigned char *authz, *orig_authz; | |
3667 | unsigned char *p; | |
3668 | size_t authz_length, i; | |
3669 | ||
3670 | if (s->state != SSL3_ST_SW_SUPPLEMENTAL_DATA_A) | |
3671 | return ssl3_do_write(s, SSL3_RT_HANDSHAKE); | |
3672 | ||
3673 | orig_authz = authz = ssl_get_authz_data(s, &authz_length); | |
3674 | if (authz == NULL) | |
3675 | { | |
3676 | /* This should never occur. */ | |
3677 | return 0; | |
3678 | } | |
3679 | ||
3680 | /* First we walk over the authz data to see how long the handshake | |
3681 | * message will be. */ | |
3682 | for (i = 0; i < authz_length; i++) | |
3683 | { | |
3684 | unsigned short len; | |
3685 | unsigned char type; | |
3686 | ||
3687 | type = *(authz++); | |
3688 | n2s(authz, len); | |
aeda172a BL |
3689 | /* n2s increments authz by 2*/ |
3690 | i += 2; | |
a9e1c50b BL |
3691 | |
3692 | if (memchr(s->s3->tlsext_authz_client_types, | |
3693 | type, | |
3694 | s->s3->tlsext_authz_client_types_len) != NULL) | |
3695 | length += 1 /* authz type */ + 2 /* length */ + len; | |
3696 | ||
3697 | authz += len; | |
3698 | i += len; | |
3699 | } | |
3700 | ||
3701 | length += 1 /* handshake type */ + | |
3702 | 3 /* handshake length */ + | |
3703 | 3 /* supplemental data length */ + | |
3704 | 2 /* supplemental entry type */ + | |
3705 | 2 /* supplemental entry length */; | |
3706 | ||
3707 | if (!BUF_MEM_grow_clean(s->init_buf, length)) | |
3708 | { | |
3709 | SSLerr(SSL_F_TLS1_SEND_SERVER_SUPPLEMENTAL_DATA,ERR_R_BUF_LIB); | |
3710 | return 0; | |
3711 | } | |
3712 | ||
3713 | p = (unsigned char *)s->init_buf->data; | |
3714 | *(p++) = SSL3_MT_SUPPLEMENTAL_DATA; | |
3715 | /* Handshake length */ | |
3716 | l2n3(length - 4, p); | |
3717 | /* Length of supplemental data */ | |
3718 | l2n3(length - 7, p); | |
3719 | /* Supplemental data type */ | |
3720 | s2n(TLSEXT_SUPPLEMENTALDATATYPE_authz_data, p); | |
3721 | /* Its length */ | |
3722 | s2n(length - 11, p); | |
3723 | ||
3724 | authz = orig_authz; | |
3725 | ||
3726 | /* Walk over the authz again and append the selected elements. */ | |
3727 | for (i = 0; i < authz_length; i++) | |
3728 | { | |
3729 | unsigned short len; | |
3730 | unsigned char type; | |
3731 | ||
3732 | type = *(authz++); | |
3733 | n2s(authz, len); | |
aeda172a BL |
3734 | /* n2s increments authz by 2 */ |
3735 | i += 2; | |
a9e1c50b BL |
3736 | |
3737 | if (memchr(s->s3->tlsext_authz_client_types, | |
3738 | type, | |
3739 | s->s3->tlsext_authz_client_types_len) != NULL) | |
3740 | { | |
3741 | *(p++) = type; | |
3742 | s2n(len, p); | |
3743 | memcpy(p, authz, len); | |
3744 | p += len; | |
3745 | } | |
3746 | ||
3747 | authz += len; | |
3748 | i += len; | |
3749 | } | |
3750 | ||
3751 | s->state = SSL3_ST_SW_SUPPLEMENTAL_DATA_B; | |
3752 | s->init_num = length; | |
3753 | s->init_off = 0; | |
3754 | ||
3755 | return ssl3_do_write(s, SSL3_RT_HANDSHAKE); | |
3756 | } | |
6434abbf | 3757 | #endif |