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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 | ||
f3b656b2 DSH |
182 | IMPLEMENT_ssl3_meth_func(SSLv3_server_method, |
183 | ssl3_accept, | |
184 | ssl_undefined_function, | |
185 | ssl3_get_server_method) | |
d02b48c6 | 186 | |
6b691a5c | 187 | int ssl3_accept(SSL *s) |
d02b48c6 RE |
188 | { |
189 | BUF_MEM *buf; | |
52b8dad8 | 190 | unsigned long alg_k,Time=(unsigned long)time(NULL); |
45d87a1f | 191 | void (*cb)(const SSL *ssl,int type,int val)=NULL; |
d02b48c6 | 192 | int ret= -1; |
d02b48c6 RE |
193 | int new_state,state,skip=0; |
194 | ||
eb952088 | 195 | RAND_add(&Time,sizeof(Time),0); |
d02b48c6 | 196 | ERR_clear_error(); |
58964a49 | 197 | clear_sys_error(); |
d02b48c6 RE |
198 | |
199 | if (s->info_callback != NULL) | |
200 | cb=s->info_callback; | |
201 | else if (s->ctx->info_callback != NULL) | |
202 | cb=s->ctx->info_callback; | |
203 | ||
204 | /* init things to blank */ | |
d02b48c6 | 205 | s->in_handshake++; |
979689aa | 206 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); |
d02b48c6 | 207 | |
b56bce4f | 208 | if (s->cert == NULL) |
d02b48c6 RE |
209 | { |
210 | SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET); | |
b56bce4f | 211 | return(-1); |
d02b48c6 | 212 | } |
d02b48c6 RE |
213 | |
214 | for (;;) | |
215 | { | |
216 | state=s->state; | |
217 | ||
218 | switch (s->state) | |
219 | { | |
220 | case SSL_ST_RENEGOTIATE: | |
c6dd154b | 221 | s->renegotiate=1; |
d02b48c6 RE |
222 | /* s->state=SSL_ST_ACCEPT; */ |
223 | ||
224 | case SSL_ST_BEFORE: | |
225 | case SSL_ST_ACCEPT: | |
226 | case SSL_ST_BEFORE|SSL_ST_ACCEPT: | |
227 | case SSL_ST_OK|SSL_ST_ACCEPT: | |
228 | ||
413c4f45 | 229 | s->server=1; |
d02b48c6 RE |
230 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); |
231 | ||
58964a49 | 232 | if ((s->version>>8) != 3) |
bbb8de09 | 233 | { |
5277d7cb | 234 | SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR); |
bbb8de09 BM |
235 | return -1; |
236 | } | |
d02b48c6 RE |
237 | s->type=SSL_ST_ACCEPT; |
238 | ||
239 | if (s->init_buf == NULL) | |
240 | { | |
241 | if ((buf=BUF_MEM_new()) == NULL) | |
242 | { | |
243 | ret= -1; | |
244 | goto end; | |
245 | } | |
246 | if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) | |
247 | { | |
248 | ret= -1; | |
249 | goto end; | |
250 | } | |
251 | s->init_buf=buf; | |
252 | } | |
253 | ||
254 | if (!ssl3_setup_buffers(s)) | |
255 | { | |
256 | ret= -1; | |
257 | goto end; | |
258 | } | |
259 | ||
d02b48c6 RE |
260 | s->init_num=0; |
261 | ||
262 | if (s->state != SSL_ST_RENEGOTIATE) | |
263 | { | |
8e2f6b79 BM |
264 | /* Ok, we now need to push on a buffering BIO so that |
265 | * the output is sent in a way that TCP likes :-) | |
266 | */ | |
267 | if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; } | |
268 | ||
745c70e5 | 269 | ssl3_init_finished_mac(s); |
d02b48c6 | 270 | s->state=SSL3_ST_SR_CLNT_HELLO_A; |
413c4f45 | 271 | s->ctx->stats.sess_accept++; |
d02b48c6 | 272 | } |
ad8ee3d7 DSH |
273 | else if (!s->s3->send_connection_binding && |
274 | !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)) | |
275 | { | |
276 | /* Server attempting to renegotiate with | |
277 | * client that doesn't support secure | |
278 | * renegotiation. | |
279 | */ | |
280 | SSLerr(SSL_F_SSL3_ACCEPT, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED); | |
281 | ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); | |
282 | ret = -1; | |
283 | goto end; | |
284 | } | |
d02b48c6 RE |
285 | else |
286 | { | |
8e2f6b79 BM |
287 | /* s->state == SSL_ST_RENEGOTIATE, |
288 | * we will just send a HelloRequest */ | |
413c4f45 | 289 | s->ctx->stats.sess_accept_renegotiate++; |
d02b48c6 RE |
290 | s->state=SSL3_ST_SW_HELLO_REQ_A; |
291 | } | |
292 | break; | |
293 | ||
294 | case SSL3_ST_SW_HELLO_REQ_A: | |
295 | case SSL3_ST_SW_HELLO_REQ_B: | |
296 | ||
297 | s->shutdown=0; | |
298 | ret=ssl3_send_hello_request(s); | |
299 | if (ret <= 0) goto end; | |
300 | s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C; | |
301 | s->state=SSL3_ST_SW_FLUSH; | |
302 | s->init_num=0; | |
303 | ||
304 | ssl3_init_finished_mac(s); | |
305 | break; | |
306 | ||
307 | case SSL3_ST_SW_HELLO_REQ_C: | |
d02b48c6 | 308 | s->state=SSL_ST_OK; |
2260ad21 | 309 | break; |
d02b48c6 RE |
310 | |
311 | case SSL3_ST_SR_CLNT_HELLO_A: | |
312 | case SSL3_ST_SR_CLNT_HELLO_B: | |
313 | case SSL3_ST_SR_CLNT_HELLO_C: | |
314 | ||
315 | s->shutdown=0; | |
316 | ret=ssl3_get_client_hello(s); | |
317 | if (ret <= 0) goto end; | |
58ece833 | 318 | |
c6dd154b | 319 | s->renegotiate = 2; |
d02b48c6 RE |
320 | s->state=SSL3_ST_SW_SRVR_HELLO_A; |
321 | s->init_num=0; | |
322 | break; | |
323 | ||
324 | case SSL3_ST_SW_SRVR_HELLO_A: | |
325 | case SSL3_ST_SW_SRVR_HELLO_B: | |
326 | ret=ssl3_send_server_hello(s); | |
327 | if (ret <= 0) goto end; | |
d26c905c | 328 | #ifndef OPENSSL_NO_TLSEXT |
d02b48c6 | 329 | if (s->hit) |
d26c905c DSH |
330 | { |
331 | if (s->tlsext_ticket_expected) | |
332 | s->state=SSL3_ST_SW_SESSION_TICKET_A; | |
333 | else | |
334 | s->state=SSL3_ST_SW_CHANGE_A; | |
335 | } | |
336 | #else | |
337 | if (s->hit) | |
338 | s->state=SSL3_ST_SW_CHANGE_A; | |
339 | #endif | |
d02b48c6 RE |
340 | else |
341 | s->state=SSL3_ST_SW_CERT_A; | |
342 | s->init_num=0; | |
343 | break; | |
344 | ||
345 | case SSL3_ST_SW_CERT_A: | |
346 | case SSL3_ST_SW_CERT_B: | |
cbb92dfa RL |
347 | /* Check if it is anon DH or anon ECDH, */ |
348 | /* normal PSK or KRB5 */ | |
52b8dad8 BM |
349 | if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) |
350 | && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK) | |
351 | && !(s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) | |
d02b48c6 RE |
352 | { |
353 | ret=ssl3_send_server_certificate(s); | |
354 | if (ret <= 0) goto end; | |
67c8e7f4 DSH |
355 | #ifndef OPENSSL_NO_TLSEXT |
356 | if (s->tlsext_status_expected) | |
357 | s->state=SSL3_ST_SW_CERT_STATUS_A; | |
358 | else | |
359 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
d02b48c6 | 360 | } |
67c8e7f4 DSH |
361 | else |
362 | { | |
363 | skip = 1; | |
364 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
365 | } | |
366 | #else | |
3ce54f35 | 367 | } |
d02b48c6 RE |
368 | else |
369 | skip=1; | |
67c8e7f4 | 370 | |
d02b48c6 | 371 | s->state=SSL3_ST_SW_KEY_EXCH_A; |
67c8e7f4 | 372 | #endif |
d02b48c6 RE |
373 | s->init_num=0; |
374 | break; | |
375 | ||
376 | case SSL3_ST_SW_KEY_EXCH_A: | |
377 | case SSL3_ST_SW_KEY_EXCH_B: | |
52b8dad8 | 378 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
d02b48c6 RE |
379 | |
380 | /* clear this, it may get reset by | |
381 | * send_server_key_exchange */ | |
f9b3bff6 | 382 | if ((s->options & SSL_OP_EPHEMERAL_RSA) |
bc36ee62 | 383 | #ifndef OPENSSL_NO_KRB5 |
52b8dad8 | 384 | && !(alg_k & SSL_kKRB5) |
bc36ee62 | 385 | #endif /* OPENSSL_NO_KRB5 */ |
f9b3bff6 | 386 | ) |
7bc03ded BM |
387 | /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key |
388 | * even when forbidden by protocol specs | |
389 | * (handshake may fail as clients are not required to | |
390 | * be able to handle this) */ | |
d02b48c6 RE |
391 | s->s3->tmp.use_rsa_tmp=1; |
392 | else | |
393 | s->s3->tmp.use_rsa_tmp=0; | |
394 | ||
ea262260 | 395 | |
d02b48c6 | 396 | /* only send if a DH key exchange, fortezza or |
ea262260 BM |
397 | * RSA but we have a sign only certificate |
398 | * | |
ddac1974 NL |
399 | * PSK: may send PSK identity hints |
400 | * | |
ea262260 BM |
401 | * For ECC ciphersuites, we send a serverKeyExchange |
402 | * message only if the cipher suite is either | |
403 | * ECDH-anon or ECDHE. In other cases, the | |
89bbe14c | 404 | * server certificate contains the server's |
ea262260 BM |
405 | * public key for key exchange. |
406 | */ | |
06ab81f9 | 407 | if (s->s3->tmp.use_rsa_tmp |
ddac1974 NL |
408 | /* PSK: send ServerKeyExchange if PSK identity |
409 | * hint if provided */ | |
410 | #ifndef OPENSSL_NO_PSK | |
52b8dad8 | 411 | || ((alg_k & SSL_kPSK) && s->ctx->psk_identity_hint) |
ddac1974 | 412 | #endif |
52b8dad8 BM |
413 | || (alg_k & (SSL_kDHr|SSL_kDHd|SSL_kEDH)) |
414 | || (alg_k & SSL_kEECDH) | |
415 | || ((alg_k & SSL_kRSA) | |
b56bce4f | 416 | && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL |
018e57c7 DSH |
417 | || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) |
418 | && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher) | |
06ab81f9 BL |
419 | ) |
420 | ) | |
421 | ) | |
d02b48c6 | 422 | ) |
d02b48c6 RE |
423 | { |
424 | ret=ssl3_send_server_key_exchange(s); | |
425 | if (ret <= 0) goto end; | |
426 | } | |
427 | else | |
428 | skip=1; | |
429 | ||
430 | s->state=SSL3_ST_SW_CERT_REQ_A; | |
431 | s->init_num=0; | |
432 | break; | |
433 | ||
434 | case SSL3_ST_SW_CERT_REQ_A: | |
435 | case SSL3_ST_SW_CERT_REQ_B: | |
47134b78 BM |
436 | if (/* don't request cert unless asked for it: */ |
437 | !(s->verify_mode & SSL_VERIFY_PEER) || | |
438 | /* if SSL_VERIFY_CLIENT_ONCE is set, | |
439 | * don't request cert during re-negotiation: */ | |
d02b48c6 | 440 | ((s->session->peer != NULL) && |
47134b78 BM |
441 | (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) || |
442 | /* never request cert in anonymous ciphersuites | |
443 | * (see section "Certificate request" in SSL 3 drafts | |
444 | * and in RFC 2246): */ | |
52b8dad8 | 445 | ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && |
47134b78 BM |
446 | /* ... except when the application insists on verification |
447 | * (against the specs, but s3_clnt.c accepts this for SSL 3) */ | |
45442167 | 448 | !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) || |
52b8dad8 BM |
449 | /* never request cert in Kerberos ciphersuites */ |
450 | (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) | |
ddac1974 NL |
451 | /* With normal PSK Certificates and |
452 | * Certificate Requests are omitted */ | |
52b8dad8 | 453 | || (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) |
d02b48c6 RE |
454 | { |
455 | /* no cert request */ | |
456 | skip=1; | |
58964a49 | 457 | s->s3->tmp.cert_request=0; |
d02b48c6 RE |
458 | s->state=SSL3_ST_SW_SRVR_DONE_A; |
459 | } | |
460 | else | |
461 | { | |
58964a49 | 462 | s->s3->tmp.cert_request=1; |
d02b48c6 RE |
463 | ret=ssl3_send_certificate_request(s); |
464 | if (ret <= 0) goto end; | |
de469ef2 | 465 | #ifndef NETSCAPE_HANG_BUG |
d02b48c6 | 466 | s->state=SSL3_ST_SW_SRVR_DONE_A; |
de469ef2 DSH |
467 | #else |
468 | s->state=SSL3_ST_SW_FLUSH; | |
469 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
470 | #endif | |
d02b48c6 RE |
471 | s->init_num=0; |
472 | } | |
473 | break; | |
474 | ||
475 | case SSL3_ST_SW_SRVR_DONE_A: | |
476 | case SSL3_ST_SW_SRVR_DONE_B: | |
477 | ret=ssl3_send_server_done(s); | |
478 | if (ret <= 0) goto end; | |
479 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
480 | s->state=SSL3_ST_SW_FLUSH; | |
481 | s->init_num=0; | |
482 | break; | |
483 | ||
484 | case SSL3_ST_SW_FLUSH: | |
57749b1b DSH |
485 | |
486 | /* This code originally checked to see if | |
487 | * any data was pending using BIO_CTRL_INFO | |
488 | * and then flushed. This caused problems | |
489 | * as documented in PR#1939. The proposed | |
490 | * fix doesn't completely resolve this issue | |
491 | * as buggy implementations of BIO_CTRL_PENDING | |
492 | * still exist. So instead we just flush | |
493 | * unconditionally. | |
ef1b6b2c DSH |
494 | */ |
495 | ||
57749b1b DSH |
496 | s->rwstate=SSL_WRITING; |
497 | if (BIO_flush(s->wbio) <= 0) | |
d02b48c6 | 498 | { |
57749b1b DSH |
499 | ret= -1; |
500 | goto end; | |
d02b48c6 | 501 | } |
57749b1b | 502 | s->rwstate=SSL_NOTHING; |
d02b48c6 RE |
503 | |
504 | s->state=s->s3->tmp.next_state; | |
505 | break; | |
506 | ||
507 | case SSL3_ST_SR_CERT_A: | |
508 | case SSL3_ST_SR_CERT_B: | |
745c70e5 | 509 | /* Check for second client hello (MS SGC) */ |
3d14b9d0 | 510 | ret = ssl3_check_client_hello(s); |
745c70e5 BM |
511 | if (ret <= 0) |
512 | goto end; | |
513 | if (ret == 2) | |
514 | s->state = SSL3_ST_SR_CLNT_HELLO_C; | |
3d14b9d0 | 515 | else { |
14f3d7c5 DSH |
516 | if (s->s3->tmp.cert_request) |
517 | { | |
518 | ret=ssl3_get_client_certificate(s); | |
519 | if (ret <= 0) goto end; | |
520 | } | |
3d14b9d0 DSH |
521 | s->init_num=0; |
522 | s->state=SSL3_ST_SR_KEY_EXCH_A; | |
523 | } | |
d02b48c6 RE |
524 | break; |
525 | ||
526 | case SSL3_ST_SR_KEY_EXCH_A: | |
527 | case SSL3_ST_SR_KEY_EXCH_B: | |
528 | ret=ssl3_get_client_key_exchange(s); | |
89bbe14c | 529 | if (ret <= 0) |
ea262260 BM |
530 | goto end; |
531 | if (ret == 2) | |
532 | { | |
533 | /* For the ECDH ciphersuites when | |
534 | * the client sends its ECDH pub key in | |
535 | * a certificate, the CertificateVerify | |
536 | * message is not sent. | |
bfd502f0 DSH |
537 | * Also for GOST ciphersuites when |
538 | * the client uses its key from the certificate | |
539 | * for key exchange. | |
ea262260 BM |
540 | */ |
541 | s->state=SSL3_ST_SR_FINISHED_A; | |
542 | s->init_num = 0; | |
543 | } | |
89bbe14c | 544 | else |
ea262260 | 545 | { |
0e1dba93 DSH |
546 | int offset=0; |
547 | int dgst_num; | |
0eab41fb | 548 | |
ea262260 BM |
549 | s->state=SSL3_ST_SR_CERT_VRFY_A; |
550 | s->init_num=0; | |
d02b48c6 | 551 | |
ea262260 BM |
552 | /* We need to get hashes here so if there is |
553 | * a client cert, it can be verified | |
81025661 DSH |
554 | * FIXME - digest processing for CertificateVerify |
555 | * should be generalized. But it is next step | |
89bbe14c | 556 | */ |
0e1dba93 | 557 | if (s->s3->handshake_buffer) |
6ba71a71 BL |
558 | if (!ssl3_digest_cached_records(s)) |
559 | return -1; | |
0e1dba93 DSH |
560 | for (dgst_num=0; dgst_num<SSL_MAX_DIGEST;dgst_num++) |
561 | if (s->s3->handshake_dgst[dgst_num]) | |
562 | { | |
0eab41fb BL |
563 | int dgst_size; |
564 | ||
0e1dba93 | 565 | 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 |
566 | dgst_size=EVP_MD_CTX_size(s->s3->handshake_dgst[dgst_num]); |
567 | if (dgst_size < 0) | |
568 | { | |
569 | ret = -1; | |
570 | goto end; | |
571 | } | |
572 | offset+=dgst_size; | |
0e1dba93 | 573 | } |
ea262260 | 574 | } |
d02b48c6 RE |
575 | break; |
576 | ||
577 | case SSL3_ST_SR_CERT_VRFY_A: | |
578 | case SSL3_ST_SR_CERT_VRFY_B: | |
579 | ||
580 | /* we should decide if we expected this one */ | |
581 | ret=ssl3_get_cert_verify(s); | |
582 | if (ret <= 0) goto end; | |
583 | ||
584 | s->state=SSL3_ST_SR_FINISHED_A; | |
585 | s->init_num=0; | |
586 | break; | |
587 | ||
588 | case SSL3_ST_SR_FINISHED_A: | |
589 | case SSL3_ST_SR_FINISHED_B: | |
590 | ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A, | |
58964a49 | 591 | SSL3_ST_SR_FINISHED_B); |
d02b48c6 | 592 | if (ret <= 0) goto end; |
6434abbf | 593 | #ifndef OPENSSL_NO_TLSEXT |
d26c905c | 594 | if (s->tlsext_ticket_expected) |
6434abbf | 595 | s->state=SSL3_ST_SW_SESSION_TICKET_A; |
d26c905c DSH |
596 | else if (s->hit) |
597 | s->state=SSL_ST_OK; | |
598 | #else | |
599 | if (s->hit) | |
600 | s->state=SSL_ST_OK; | |
6434abbf | 601 | #endif |
d02b48c6 RE |
602 | else |
603 | s->state=SSL3_ST_SW_CHANGE_A; | |
604 | s->init_num=0; | |
605 | break; | |
606 | ||
6434abbf DSH |
607 | #ifndef OPENSSL_NO_TLSEXT |
608 | case SSL3_ST_SW_SESSION_TICKET_A: | |
609 | case SSL3_ST_SW_SESSION_TICKET_B: | |
610 | ret=ssl3_send_newsession_ticket(s); | |
611 | if (ret <= 0) goto end; | |
612 | s->state=SSL3_ST_SW_CHANGE_A; | |
613 | s->init_num=0; | |
614 | break; | |
615 | ||
67c8e7f4 DSH |
616 | case SSL3_ST_SW_CERT_STATUS_A: |
617 | case SSL3_ST_SW_CERT_STATUS_B: | |
618 | ret=ssl3_send_cert_status(s); | |
619 | if (ret <= 0) goto end; | |
620 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
621 | s->init_num=0; | |
622 | break; | |
623 | ||
6434abbf DSH |
624 | #endif |
625 | ||
d02b48c6 RE |
626 | case SSL3_ST_SW_CHANGE_A: |
627 | case SSL3_ST_SW_CHANGE_B: | |
628 | ||
629 | s->session->cipher=s->s3->tmp.new_cipher; | |
58964a49 RE |
630 | if (!s->method->ssl3_enc->setup_key_block(s)) |
631 | { ret= -1; goto end; } | |
d02b48c6 RE |
632 | |
633 | ret=ssl3_send_change_cipher_spec(s, | |
634 | SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B); | |
635 | ||
636 | if (ret <= 0) goto end; | |
637 | s->state=SSL3_ST_SW_FINISHED_A; | |
638 | s->init_num=0; | |
639 | ||
58964a49 | 640 | if (!s->method->ssl3_enc->change_cipher_state(s, |
d02b48c6 RE |
641 | SSL3_CHANGE_CIPHER_SERVER_WRITE)) |
642 | { | |
643 | ret= -1; | |
644 | goto end; | |
645 | } | |
646 | ||
647 | break; | |
648 | ||
649 | case SSL3_ST_SW_FINISHED_A: | |
650 | case SSL3_ST_SW_FINISHED_B: | |
651 | ret=ssl3_send_finished(s, | |
652 | SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B, | |
c44f7540 BM |
653 | s->method->ssl3_enc->server_finished_label, |
654 | s->method->ssl3_enc->server_finished_label_len); | |
d02b48c6 RE |
655 | if (ret <= 0) goto end; |
656 | s->state=SSL3_ST_SW_FLUSH; | |
657 | if (s->hit) | |
658 | s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; | |
659 | else | |
660 | s->s3->tmp.next_state=SSL_ST_OK; | |
661 | s->init_num=0; | |
662 | break; | |
663 | ||
664 | case SSL_ST_OK: | |
665 | /* clean a few things up */ | |
666 | ssl3_cleanup_key_block(s); | |
667 | ||
668 | BUF_MEM_free(s->init_buf); | |
669 | s->init_buf=NULL; | |
670 | ||
671 | /* remove buffering on output */ | |
413c4f45 | 672 | ssl_free_wbio_buffer(s); |
d02b48c6 | 673 | |
d02b48c6 RE |
674 | s->init_num=0; |
675 | ||
c6dd154b | 676 | if (s->renegotiate == 2) /* skipped if we just sent a HelloRequest */ |
b49124f6 BM |
677 | { |
678 | /* actually not necessarily a 'new' session unless | |
679 | * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */ | |
680 | ||
c6dd154b | 681 | s->renegotiate=0; |
b49124f6 BM |
682 | s->new_session=0; |
683 | ||
684 | ssl_update_cache(s,SSL_SESS_CACHE_SERVER); | |
685 | ||
686 | s->ctx->stats.sess_accept_good++; | |
687 | /* s->server=1; */ | |
688 | s->handshake_func=ssl3_accept; | |
d02b48c6 | 689 | |
b49124f6 BM |
690 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); |
691 | } | |
692 | ||
681bfae4 | 693 | ret = 1; |
d02b48c6 | 694 | goto end; |
58964a49 | 695 | /* break; */ |
d02b48c6 RE |
696 | |
697 | default: | |
698 | SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE); | |
699 | ret= -1; | |
700 | goto end; | |
58964a49 | 701 | /* break; */ |
d02b48c6 RE |
702 | } |
703 | ||
704 | if (!s->s3->tmp.reuse_message && !skip) | |
705 | { | |
58964a49 RE |
706 | if (s->debug) |
707 | { | |
708 | if ((ret=BIO_flush(s->wbio)) <= 0) | |
709 | goto end; | |
710 | } | |
711 | ||
d02b48c6 RE |
712 | |
713 | if ((cb != NULL) && (s->state != state)) | |
714 | { | |
715 | new_state=s->state; | |
716 | s->state=state; | |
717 | cb(s,SSL_CB_ACCEPT_LOOP,1); | |
718 | s->state=new_state; | |
719 | } | |
720 | } | |
721 | skip=0; | |
722 | } | |
723 | end: | |
724 | /* BIO_flush(s->wbio); */ | |
725 | ||
4d635a70 | 726 | s->in_handshake--; |
d02b48c6 RE |
727 | if (cb != NULL) |
728 | cb(s,SSL_CB_ACCEPT_EXIT,ret); | |
d02b48c6 RE |
729 | return(ret); |
730 | } | |
731 | ||
36d16f8e | 732 | int ssl3_send_hello_request(SSL *s) |
d02b48c6 RE |
733 | { |
734 | unsigned char *p; | |
735 | ||
736 | if (s->state == SSL3_ST_SW_HELLO_REQ_A) | |
737 | { | |
738 | p=(unsigned char *)s->init_buf->data; | |
c51ae173 | 739 | *(p++)=SSL3_MT_HELLO_REQUEST; |
d02b48c6 RE |
740 | *(p++)=0; |
741 | *(p++)=0; | |
742 | *(p++)=0; | |
743 | ||
744 | s->state=SSL3_ST_SW_HELLO_REQ_B; | |
745 | /* number of bytes to write */ | |
746 | s->init_num=4; | |
747 | s->init_off=0; | |
748 | } | |
749 | ||
750 | /* SSL3_ST_SW_HELLO_REQ_B */ | |
751 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
752 | } | |
753 | ||
36d16f8e | 754 | int ssl3_check_client_hello(SSL *s) |
3d14b9d0 DSH |
755 | { |
756 | int ok; | |
757 | long n; | |
758 | ||
b78e5021 BM |
759 | /* this function is called when we really expect a Certificate message, |
760 | * so permit appropriate message length */ | |
36d16f8e | 761 | n=s->method->ssl_get_message(s, |
3d14b9d0 DSH |
762 | SSL3_ST_SR_CERT_A, |
763 | SSL3_ST_SR_CERT_B, | |
764 | -1, | |
c0f5dd07 | 765 | s->max_cert_list, |
3d14b9d0 DSH |
766 | &ok); |
767 | if (!ok) return((int)n); | |
768 | s->s3->tmp.reuse_message = 1; | |
a2a01589 BM |
769 | if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO) |
770 | { | |
771 | /* Throw away what we have done so far in the current handshake, | |
772 | * which will now be aborted. (A full SSL_clear would be too much.) | |
773 | * I hope that tmp.dh is the only thing that may need to be cleared | |
774 | * when a handshake is not completed ... */ | |
bc36ee62 | 775 | #ifndef OPENSSL_NO_DH |
a2a01589 BM |
776 | if (s->s3->tmp.dh != NULL) |
777 | { | |
778 | DH_free(s->s3->tmp.dh); | |
779 | s->s3->tmp.dh = NULL; | |
780 | } | |
781 | #endif | |
782 | return 2; | |
783 | } | |
3d14b9d0 DSH |
784 | return 1; |
785 | } | |
786 | ||
36d16f8e | 787 | int ssl3_get_client_hello(SSL *s) |
d02b48c6 RE |
788 | { |
789 | int i,j,ok,al,ret= -1; | |
6c61726b | 790 | unsigned int cookie_len; |
d02b48c6 RE |
791 | long n; |
792 | unsigned long id; | |
413c4f45 | 793 | unsigned char *p,*d,*q; |
d02b48c6 | 794 | SSL_CIPHER *c; |
09b6c2ef | 795 | #ifndef OPENSSL_NO_COMP |
413c4f45 | 796 | SSL_COMP *comp=NULL; |
09b6c2ef | 797 | #endif |
f73e07cf | 798 | STACK_OF(SSL_CIPHER) *ciphers=NULL; |
d02b48c6 | 799 | |
58964a49 RE |
800 | /* We do this so that we will respond with our native type. |
801 | * If we are TLSv1 and we get SSLv3, we will respond with TLSv1, | |
802 | * This down switching should be handled by a different method. | |
803 | * If we are SSLv3, we will respond with SSLv3, even if prompted with | |
804 | * TLSv1. | |
805 | */ | |
d02b48c6 RE |
806 | if (s->state == SSL3_ST_SR_CLNT_HELLO_A) |
807 | { | |
d02b48c6 RE |
808 | s->state=SSL3_ST_SR_CLNT_HELLO_B; |
809 | } | |
1e24b3a0 | 810 | s->first_packet=1; |
36d16f8e | 811 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
812 | SSL3_ST_SR_CLNT_HELLO_B, |
813 | SSL3_ST_SR_CLNT_HELLO_C, | |
814 | SSL3_MT_CLIENT_HELLO, | |
815 | SSL3_RT_MAX_PLAIN_LENGTH, | |
816 | &ok); | |
817 | ||
818 | if (!ok) return((int)n); | |
1e24b3a0 | 819 | s->first_packet=0; |
48948d53 | 820 | d=p=(unsigned char *)s->init_msg; |
d02b48c6 | 821 | |
074309b7 BM |
822 | /* use version from inside client hello, not from record header |
823 | * (may differ: see RFC 2246, Appendix E, second paragraph) */ | |
824 | s->client_version=(((int)p[0])<<8)|(int)p[1]; | |
d02b48c6 RE |
825 | p+=2; |
826 | ||
7432d073 AP |
827 | if ((s->version == DTLS1_VERSION && s->client_version > s->version) || |
828 | (s->version != DTLS1_VERSION && s->client_version < s->version)) | |
a661b653 BM |
829 | { |
830 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER); | |
89bbe14c | 831 | if ((s->client_version>>8) == SSL3_VERSION_MAJOR) |
a661b653 BM |
832 | { |
833 | /* similar to ssl3_get_record, send alert using remote version number */ | |
834 | s->version = s->client_version; | |
835 | } | |
836 | al = SSL_AD_PROTOCOL_VERSION; | |
837 | goto f_err; | |
838 | } | |
839 | ||
2e9802b7 DSH |
840 | /* If we require cookies and this ClientHello doesn't |
841 | * contain one, just return since we do not want to | |
842 | * allocate any memory yet. So check cookie length... | |
843 | */ | |
844 | if (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) | |
845 | { | |
846 | unsigned int session_length, cookie_length; | |
847 | ||
848 | session_length = *(p + SSL3_RANDOM_SIZE); | |
849 | cookie_length = *(p + SSL3_RANDOM_SIZE + session_length + 1); | |
850 | ||
9769137a | 851 | if (cookie_length == 0) |
2e9802b7 DSH |
852 | return 1; |
853 | } | |
854 | ||
d02b48c6 RE |
855 | /* load the client random */ |
856 | memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE); | |
857 | p+=SSL3_RANDOM_SIZE; | |
858 | ||
859 | /* get the session-id */ | |
860 | j= *(p++); | |
861 | ||
862 | s->hit=0; | |
6b0e9fac BM |
863 | /* Versions before 0.9.7 always allow session reuse during renegotiation |
864 | * (i.e. when s->new_session is true), option | |
865 | * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is new with 0.9.7. | |
866 | * Maybe this optional behaviour should always have been the default, | |
867 | * but we cannot safely change the default behaviour (or new applications | |
868 | * might be written that become totally unsecure when compiled with | |
869 | * an earlier library version) | |
870 | */ | |
6434abbf | 871 | if ((s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION))) |
d02b48c6 RE |
872 | { |
873 | if (!ssl_get_new_session(s,1)) | |
874 | goto err; | |
875 | } | |
876 | else | |
877 | { | |
6434abbf | 878 | i=ssl_get_prev_session(s, p, j, d + n); |
d02b48c6 RE |
879 | if (i == 1) |
880 | { /* previous session */ | |
881 | s->hit=1; | |
882 | } | |
8876bc05 BM |
883 | else if (i == -1) |
884 | goto err; | |
885 | else /* i == 0 */ | |
d02b48c6 RE |
886 | { |
887 | if (!ssl_get_new_session(s,1)) | |
888 | goto err; | |
889 | } | |
890 | } | |
891 | ||
892 | p+=j; | |
36d16f8e | 893 | |
2e9802b7 | 894 | if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER) |
36d16f8e BL |
895 | { |
896 | /* cookie stuff */ | |
897 | cookie_len = *(p++); | |
898 | ||
beb056b3 BM |
899 | /* |
900 | * The ClientHello may contain a cookie even if the | |
901 | * HelloVerify message has not been sent--make sure that it | |
902 | * does not cause an overflow. | |
903 | */ | |
36d16f8e BL |
904 | if ( cookie_len > sizeof(s->d1->rcvd_cookie)) |
905 | { | |
906 | /* too much data */ | |
beb056b3 | 907 | al = SSL_AD_DECODE_ERROR; |
36d16f8e BL |
908 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH); |
909 | goto f_err; | |
910 | } | |
911 | ||
beb056b3 | 912 | /* verify the cookie if appropriate option is set. */ |
2e9802b7 | 913 | if ((SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) && |
beb056b3 BM |
914 | cookie_len > 0) |
915 | { | |
916 | memcpy(s->d1->rcvd_cookie, p, cookie_len); | |
917 | ||
918 | if ( s->ctx->app_verify_cookie_cb != NULL) | |
919 | { | |
920 | if ( s->ctx->app_verify_cookie_cb(s, s->d1->rcvd_cookie, | |
921 | cookie_len) == 0) | |
922 | { | |
923 | al=SSL_AD_HANDSHAKE_FAILURE; | |
924 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, | |
925 | SSL_R_COOKIE_MISMATCH); | |
926 | goto f_err; | |
927 | } | |
928 | /* else cookie verification succeeded */ | |
929 | } | |
930 | else if ( memcmp(s->d1->rcvd_cookie, s->d1->cookie, | |
931 | s->d1->cookie_len) != 0) /* default verification */ | |
932 | { | |
933 | al=SSL_AD_HANDSHAKE_FAILURE; | |
934 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, | |
935 | SSL_R_COOKIE_MISMATCH); | |
936 | goto f_err; | |
937 | } | |
2e9802b7 DSH |
938 | |
939 | ret = 2; | |
beb056b3 BM |
940 | } |
941 | ||
942 | p += cookie_len; | |
36d16f8e BL |
943 | } |
944 | ||
d02b48c6 RE |
945 | n2s(p,i); |
946 | if ((i == 0) && (j != 0)) | |
947 | { | |
948 | /* we need a cipher if we are not resuming a session */ | |
58964a49 | 949 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
950 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED); |
951 | goto f_err; | |
952 | } | |
82b0bf0b | 953 | if ((p+i) >= (d+n)) |
d02b48c6 RE |
954 | { |
955 | /* not enough data */ | |
58964a49 | 956 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
957 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); |
958 | goto f_err; | |
959 | } | |
960 | if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers)) | |
961 | == NULL)) | |
962 | { | |
963 | goto err; | |
964 | } | |
965 | p+=i; | |
966 | ||
967 | /* If it is a hit, check that the cipher is in the list */ | |
968 | if ((s->hit) && (i > 0)) | |
969 | { | |
970 | j=0; | |
971 | id=s->session->cipher->id; | |
972 | ||
413c4f45 MC |
973 | #ifdef CIPHER_DEBUG |
974 | printf("client sent %d ciphers\n",sk_num(ciphers)); | |
975 | #endif | |
f73e07cf | 976 | for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++) |
d02b48c6 | 977 | { |
f73e07cf | 978 | c=sk_SSL_CIPHER_value(ciphers,i); |
413c4f45 MC |
979 | #ifdef CIPHER_DEBUG |
980 | printf("client [%2d of %2d]:%s\n", | |
981 | i,sk_num(ciphers),SSL_CIPHER_get_name(c)); | |
982 | #endif | |
d02b48c6 RE |
983 | if (c->id == id) |
984 | { | |
985 | j=1; | |
986 | break; | |
987 | } | |
988 | } | |
346601bc BM |
989 | /* Disabled because it can be used in a ciphersuite downgrade |
990 | * attack: CVE-2010-4180. | |
991 | */ | |
992 | #if 0 | |
837f2fc7 | 993 | if (j == 0 && (s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1)) |
d02b48c6 | 994 | { |
837f2fc7 BM |
995 | /* Special case as client bug workaround: the previously used cipher may |
996 | * not be in the current list, the client instead might be trying to | |
997 | * continue using a cipher that before wasn't chosen due to server | |
998 | * preferences. We'll have to reject the connection if the cipher is not | |
999 | * enabled, though. */ | |
1000 | c = sk_SSL_CIPHER_value(ciphers, 0); | |
1001 | if (sk_SSL_CIPHER_find(SSL_get_ciphers(s), c) >= 0) | |
d02b48c6 | 1002 | { |
837f2fc7 BM |
1003 | s->session->cipher = c; |
1004 | j = 1; | |
d02b48c6 RE |
1005 | } |
1006 | } | |
346601bc | 1007 | #endif |
837f2fc7 BM |
1008 | if (j == 0) |
1009 | { | |
1010 | /* we need to have the cipher in the cipher | |
1011 | * list if we are asked to reuse it */ | |
1012 | al=SSL_AD_ILLEGAL_PARAMETER; | |
1013 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING); | |
1014 | goto f_err; | |
1015 | } | |
d02b48c6 RE |
1016 | } |
1017 | ||
1018 | /* compression */ | |
1019 | i= *(p++); | |
82b0bf0b BM |
1020 | if ((p+i) > (d+n)) |
1021 | { | |
1022 | /* not enough data */ | |
1023 | al=SSL_AD_DECODE_ERROR; | |
1024 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); | |
1025 | goto f_err; | |
1026 | } | |
413c4f45 | 1027 | q=p; |
d02b48c6 | 1028 | for (j=0; j<i; j++) |
413c4f45 | 1029 | { |
d02b48c6 | 1030 | if (p[j] == 0) break; |
413c4f45 | 1031 | } |
d02b48c6 RE |
1032 | |
1033 | p+=i; | |
1034 | if (j >= i) | |
1035 | { | |
1036 | /* no compress */ | |
58964a49 | 1037 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1038 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED); |
1039 | goto f_err; | |
1040 | } | |
1041 | ||
58ece833 BM |
1042 | #ifndef OPENSSL_NO_TLSEXT |
1043 | /* TLS extensions*/ | |
10f99d7b | 1044 | if (s->version >= SSL3_VERSION) |
58ece833 BM |
1045 | { |
1046 | if (!ssl_parse_clienthello_tlsext(s,&p,d,n, &al)) | |
1047 | { | |
1048 | /* 'al' set by ssl_parse_clienthello_tlsext */ | |
36ca4ba6 | 1049 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_PARSE_TLSEXT); |
58ece833 BM |
1050 | goto f_err; |
1051 | } | |
1052 | } | |
36ca4ba6 | 1053 | if (ssl_check_clienthello_tlsext(s) <= 0) { |
a291745e | 1054 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); |
58ece833 BM |
1055 | goto err; |
1056 | } | |
12bf56c0 DSH |
1057 | |
1058 | /* Check if we want to use external pre-shared secret for this | |
1059 | * handshake for not reused session only. We need to generate | |
1060 | * server_random before calling tls_session_secret_cb in order to allow | |
1061 | * SessionTicket processing to use it in key derivation. */ | |
1062 | { | |
1063 | unsigned long Time; | |
1064 | unsigned char *pos; | |
1065 | Time=(unsigned long)time(NULL); /* Time */ | |
1066 | pos=s->s3->server_random; | |
1067 | l2n(Time,pos); | |
1068 | if (RAND_pseudo_bytes(pos,SSL3_RANDOM_SIZE-4) <= 0) | |
1069 | { | |
1070 | al=SSL_AD_INTERNAL_ERROR; | |
1071 | goto f_err; | |
1072 | } | |
1073 | } | |
1074 | ||
1075 | if (!s->hit && s->version >= TLS1_VERSION && s->tls_session_secret_cb) | |
1076 | { | |
1077 | SSL_CIPHER *pref_cipher=NULL; | |
1078 | ||
1079 | s->session->master_key_length=sizeof(s->session->master_key); | |
1080 | if(s->tls_session_secret_cb(s, s->session->master_key, &s->session->master_key_length, | |
1081 | ciphers, &pref_cipher, s->tls_session_secret_cb_arg)) | |
1082 | { | |
1083 | s->hit=1; | |
1084 | s->session->ciphers=ciphers; | |
1085 | s->session->verify_result=X509_V_OK; | |
1086 | ||
1087 | ciphers=NULL; | |
1088 | ||
1089 | /* check if some cipher was preferred by call back */ | |
1090 | pref_cipher=pref_cipher ? pref_cipher : ssl3_choose_cipher(s, s->session->ciphers, SSL_get_ciphers(s)); | |
1091 | if (pref_cipher == NULL) | |
1092 | { | |
1093 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1094 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER); | |
1095 | goto f_err; | |
1096 | } | |
1097 | ||
1098 | s->session->cipher=pref_cipher; | |
1099 | ||
1100 | if (s->cipher_list) | |
1101 | sk_SSL_CIPHER_free(s->cipher_list); | |
1102 | ||
1103 | if (s->cipher_list_by_id) | |
1104 | sk_SSL_CIPHER_free(s->cipher_list_by_id); | |
1105 | ||
1106 | s->cipher_list = sk_SSL_CIPHER_dup(s->session->ciphers); | |
1107 | s->cipher_list_by_id = sk_SSL_CIPHER_dup(s->session->ciphers); | |
1108 | } | |
1109 | } | |
58ece833 BM |
1110 | #endif |
1111 | ||
413c4f45 MC |
1112 | /* Worst case, we will use the NULL compression, but if we have other |
1113 | * options, we will now look for them. We have i-1 compression | |
1114 | * algorithms from the client, starting at q. */ | |
1115 | s->s3->tmp.new_compression=NULL; | |
09b6c2ef | 1116 | #ifndef OPENSSL_NO_COMP |
e642fd7a DSH |
1117 | /* This only happens if we have a cache hit */ |
1118 | if (s->session->compress_meth != 0) | |
1119 | { | |
1120 | int m, comp_id = s->session->compress_meth; | |
1121 | /* Perform sanity checks on resumed compression algorithm */ | |
1122 | /* Can't disable compression */ | |
1123 | if (s->options & SSL_OP_NO_COMPRESSION) | |
1124 | { | |
1125 | al=SSL_AD_INTERNAL_ERROR; | |
1126 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INCONSISTENT_COMPRESSION); | |
1127 | goto f_err; | |
1128 | } | |
1129 | /* Look for resumed compression method */ | |
1130 | for (m = 0; m < sk_SSL_COMP_num(s->ctx->comp_methods); m++) | |
1131 | { | |
1132 | comp=sk_SSL_COMP_value(s->ctx->comp_methods,m); | |
1133 | if (comp_id == comp->id) | |
1134 | { | |
1135 | s->s3->tmp.new_compression=comp; | |
1136 | break; | |
1137 | } | |
1138 | } | |
1139 | if (s->s3->tmp.new_compression == NULL) | |
1140 | { | |
1141 | al=SSL_AD_INTERNAL_ERROR; | |
1142 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INVALID_COMPRESSION_ALGORITHM); | |
1143 | goto f_err; | |
1144 | } | |
1145 | /* Look for resumed method in compression list */ | |
1146 | for (m = 0; m < i; m++) | |
1147 | { | |
1148 | if (q[m] == comp_id) | |
1149 | break; | |
1150 | } | |
1151 | if (m >= i) | |
1152 | { | |
1153 | al=SSL_AD_ILLEGAL_PARAMETER; | |
1154 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_COMPRESSSION_ALGORITHM_MISSING); | |
1155 | goto f_err; | |
1156 | } | |
1157 | } | |
1158 | else if (s->hit) | |
1159 | comp = NULL; | |
1160 | else if (!(s->options & SSL_OP_NO_COMPRESSION) && s->ctx->comp_methods) | |
413c4f45 MC |
1161 | { /* See if we have a match */ |
1162 | int m,nn,o,v,done=0; | |
1163 | ||
f73e07cf | 1164 | nn=sk_SSL_COMP_num(s->ctx->comp_methods); |
413c4f45 MC |
1165 | for (m=0; m<nn; m++) |
1166 | { | |
f73e07cf | 1167 | comp=sk_SSL_COMP_value(s->ctx->comp_methods,m); |
413c4f45 MC |
1168 | v=comp->id; |
1169 | for (o=0; o<i; o++) | |
1170 | { | |
1171 | if (v == q[o]) | |
1172 | { | |
1173 | done=1; | |
1174 | break; | |
1175 | } | |
1176 | } | |
1177 | if (done) break; | |
1178 | } | |
1179 | if (done) | |
1180 | s->s3->tmp.new_compression=comp; | |
1181 | else | |
1182 | comp=NULL; | |
1183 | } | |
e642fd7a DSH |
1184 | #else |
1185 | /* If compression is disabled we'd better not try to resume a session | |
1186 | * using compression. | |
1187 | */ | |
4cba294d | 1188 | if (s->session->compress_meth != 0) |
e642fd7a DSH |
1189 | { |
1190 | al=SSL_AD_INTERNAL_ERROR; | |
1191 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_INCONSISTENT_COMPRESSION); | |
1192 | goto f_err; | |
1193 | } | |
09b6c2ef | 1194 | #endif |
413c4f45 | 1195 | |
836f9960 | 1196 | /* Given s->session->ciphers and SSL_get_ciphers, we must |
d02b48c6 RE |
1197 | * pick a cipher */ |
1198 | ||
1199 | if (!s->hit) | |
1200 | { | |
09b6c2ef DSH |
1201 | #ifdef OPENSSL_NO_COMP |
1202 | s->session->compress_meth=0; | |
1203 | #else | |
413c4f45 | 1204 | s->session->compress_meth=(comp == NULL)?0:comp->id; |
09b6c2ef | 1205 | #endif |
d02b48c6 | 1206 | if (s->session->ciphers != NULL) |
f73e07cf | 1207 | sk_SSL_CIPHER_free(s->session->ciphers); |
d02b48c6 RE |
1208 | s->session->ciphers=ciphers; |
1209 | if (ciphers == NULL) | |
1210 | { | |
58964a49 | 1211 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
1212 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED); |
1213 | goto f_err; | |
1214 | } | |
1215 | ciphers=NULL; | |
1216 | c=ssl3_choose_cipher(s,s->session->ciphers, | |
836f9960 | 1217 | SSL_get_ciphers(s)); |
d02b48c6 RE |
1218 | |
1219 | if (c == NULL) | |
1220 | { | |
58964a49 | 1221 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1222 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER); |
1223 | goto f_err; | |
1224 | } | |
1225 | s->s3->tmp.new_cipher=c; | |
1226 | } | |
1227 | else | |
1228 | { | |
1229 | /* Session-id reuse */ | |
1230 | #ifdef REUSE_CIPHER_BUG | |
f73e07cf | 1231 | STACK_OF(SSL_CIPHER) *sk; |
d02b48c6 RE |
1232 | SSL_CIPHER *nc=NULL; |
1233 | SSL_CIPHER *ec=NULL; | |
1234 | ||
58964a49 | 1235 | if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG) |
d02b48c6 RE |
1236 | { |
1237 | sk=s->session->ciphers; | |
f73e07cf | 1238 | for (i=0; i<sk_SSL_CIPHER_num(sk); i++) |
d02b48c6 | 1239 | { |
f73e07cf | 1240 | c=sk_SSL_CIPHER_value(sk,i); |
52b8dad8 | 1241 | if (c->algorithm_enc & SSL_eNULL) |
d02b48c6 | 1242 | nc=c; |
06ab81f9 | 1243 | if (SSL_C_IS_EXPORT(c)) |
d02b48c6 RE |
1244 | ec=c; |
1245 | } | |
1246 | if (nc != NULL) | |
1247 | s->s3->tmp.new_cipher=nc; | |
1248 | else if (ec != NULL) | |
1249 | s->s3->tmp.new_cipher=ec; | |
1250 | else | |
1251 | s->s3->tmp.new_cipher=s->session->cipher; | |
1252 | } | |
1253 | else | |
1254 | #endif | |
1255 | s->s3->tmp.new_cipher=s->session->cipher; | |
1256 | } | |
30551400 | 1257 | |
6ba71a71 BL |
1258 | if (!ssl3_digest_cached_records(s)) |
1259 | goto f_err; | |
d02b48c6 RE |
1260 | |
1261 | /* we now have the following setup. | |
1262 | * client_random | |
1263 | * cipher_list - our prefered list of ciphers | |
1264 | * ciphers - the clients prefered list of ciphers | |
1265 | * compression - basically ignored right now | |
1266 | * ssl version is set - sslv3 | |
1267 | * s->session - The ssl session has been setup. | |
657e60fa | 1268 | * s->hit - session reuse flag |
d02b48c6 RE |
1269 | * s->tmp.new_cipher - the new cipher to use. |
1270 | */ | |
1271 | ||
2e9802b7 | 1272 | if (ret < 0) ret=1; |
d02b48c6 RE |
1273 | if (0) |
1274 | { | |
1275 | f_err: | |
1276 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1277 | } | |
1278 | err: | |
f73e07cf | 1279 | if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers); |
d02b48c6 RE |
1280 | return(ret); |
1281 | } | |
1282 | ||
36d16f8e | 1283 | int ssl3_send_server_hello(SSL *s) |
d02b48c6 RE |
1284 | { |
1285 | unsigned char *buf; | |
1286 | unsigned char *p,*d; | |
1287 | int i,sl; | |
12bf56c0 DSH |
1288 | unsigned long l; |
1289 | #ifdef OPENSSL_NO_TLSEXT | |
1290 | unsigned long Time; | |
1291 | #endif | |
d02b48c6 RE |
1292 | |
1293 | if (s->state == SSL3_ST_SW_SRVR_HELLO_A) | |
1294 | { | |
1295 | buf=(unsigned char *)s->init_buf->data; | |
12bf56c0 | 1296 | #ifdef OPENSSL_NO_TLSEXT |
d02b48c6 | 1297 | p=s->s3->server_random; |
12bf56c0 | 1298 | /* Generate server_random if it was not needed previously */ |
7bbcb2f6 | 1299 | Time=(unsigned long)time(NULL); /* Time */ |
d02b48c6 | 1300 | l2n(Time,p); |
7c7667b8 NL |
1301 | if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) |
1302 | return -1; | |
12bf56c0 | 1303 | #endif |
d02b48c6 RE |
1304 | /* Do the message type and length last */ |
1305 | d=p= &(buf[4]); | |
1306 | ||
58964a49 RE |
1307 | *(p++)=s->version>>8; |
1308 | *(p++)=s->version&0xff; | |
d02b48c6 RE |
1309 | |
1310 | /* Random stuff */ | |
1311 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
1312 | p+=SSL3_RANDOM_SIZE; | |
1313 | ||
1314 | /* now in theory we have 3 options to sending back the | |
1315 | * session id. If it is a re-use, we send back the | |
1316 | * old session-id, if it is a new session, we send | |
1317 | * back the new session-id or we send back a 0 length | |
1318 | * session-id if we want it to be single use. | |
1319 | * Currently I will not implement the '0' length session-id | |
58964a49 | 1320 | * 12-Jan-98 - I'll now support the '0' length stuff. |
dc634aff DSH |
1321 | * |
1322 | * We also have an additional case where stateless session | |
1323 | * resumption is successful: we always send back the old | |
1324 | * session id. In this case s->hit is non zero: this can | |
1325 | * only happen if stateless session resumption is succesful | |
1326 | * if session caching is disabled so existing functionality | |
1327 | * is unaffected. | |
d02b48c6 | 1328 | */ |
dc634aff DSH |
1329 | if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER) |
1330 | && !s->hit) | |
58964a49 | 1331 | s->session->session_id_length=0; |
d02b48c6 RE |
1332 | |
1333 | sl=s->session->session_id_length; | |
27545970 | 1334 | if (sl > (int)sizeof(s->session->session_id)) |
5574e0ed BM |
1335 | { |
1336 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1337 | return -1; | |
1338 | } | |
d02b48c6 RE |
1339 | *(p++)=sl; |
1340 | memcpy(p,s->session->session_id,sl); | |
1341 | p+=sl; | |
1342 | ||
1343 | /* put the cipher */ | |
1344 | i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p); | |
1345 | p+=i; | |
1346 | ||
1347 | /* put the compression method */ | |
09b6c2ef DSH |
1348 | #ifdef OPENSSL_NO_COMP |
1349 | *(p++)=0; | |
1350 | #else | |
413c4f45 MC |
1351 | if (s->s3->tmp.new_compression == NULL) |
1352 | *(p++)=0; | |
1353 | else | |
1354 | *(p++)=s->s3->tmp.new_compression->id; | |
09b6c2ef | 1355 | #endif |
ed3883d2 | 1356 | #ifndef OPENSSL_NO_TLSEXT |
36ca4ba6 BM |
1357 | if (ssl_prepare_serverhello_tlsext(s) <= 0) |
1358 | { | |
1359 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); | |
1360 | return -1; | |
1361 | } | |
f1fd4544 BM |
1362 | if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) |
1363 | { | |
ed3883d2 BM |
1364 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR); |
1365 | return -1; | |
f1fd4544 | 1366 | } |
ed3883d2 | 1367 | #endif |
d02b48c6 RE |
1368 | /* do the header */ |
1369 | l=(p-d); | |
1370 | d=buf; | |
1371 | *(d++)=SSL3_MT_SERVER_HELLO; | |
1372 | l2n3(l,d); | |
1373 | ||
fcbdde0d | 1374 | s->state=SSL3_ST_SW_SRVR_HELLO_B; |
d02b48c6 RE |
1375 | /* number of bytes to write */ |
1376 | s->init_num=p-buf; | |
1377 | s->init_off=0; | |
1378 | } | |
1379 | ||
fcbdde0d | 1380 | /* SSL3_ST_SW_SRVR_HELLO_B */ |
d02b48c6 RE |
1381 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); |
1382 | } | |
1383 | ||
36d16f8e | 1384 | int ssl3_send_server_done(SSL *s) |
d02b48c6 RE |
1385 | { |
1386 | unsigned char *p; | |
1387 | ||
1388 | if (s->state == SSL3_ST_SW_SRVR_DONE_A) | |
1389 | { | |
1390 | p=(unsigned char *)s->init_buf->data; | |
1391 | ||
1392 | /* do the header */ | |
1393 | *(p++)=SSL3_MT_SERVER_DONE; | |
1394 | *(p++)=0; | |
1395 | *(p++)=0; | |
1396 | *(p++)=0; | |
1397 | ||
1398 | s->state=SSL3_ST_SW_SRVR_DONE_B; | |
1399 | /* number of bytes to write */ | |
1400 | s->init_num=4; | |
1401 | s->init_off=0; | |
1402 | } | |
1403 | ||
e65bcbce | 1404 | /* SSL3_ST_SW_SRVR_DONE_B */ |
d02b48c6 RE |
1405 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); |
1406 | } | |
1407 | ||
36d16f8e | 1408 | int ssl3_send_server_key_exchange(SSL *s) |
d02b48c6 | 1409 | { |
bc36ee62 | 1410 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
1411 | unsigned char *q; |
1412 | int j,num; | |
1413 | RSA *rsa; | |
1414 | unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; | |
752d706a | 1415 | unsigned int u; |
d02b48c6 | 1416 | #endif |
bc36ee62 | 1417 | #ifndef OPENSSL_NO_DH |
9d1a01be | 1418 | DH *dh=NULL,*dhp; |
ea262260 BM |
1419 | #endif |
1420 | #ifndef OPENSSL_NO_ECDH | |
1421 | EC_KEY *ecdh=NULL, *ecdhp; | |
1422 | unsigned char *encodedPoint = NULL; | |
1423 | int encodedlen = 0; | |
1424 | int curve_id = 0; | |
1425 | BN_CTX *bn_ctx = NULL; | |
d02b48c6 RE |
1426 | #endif |
1427 | EVP_PKEY *pkey; | |
1428 | unsigned char *p,*d; | |
1429 | int al,i; | |
1430 | unsigned long type; | |
1431 | int n; | |
1432 | CERT *cert; | |
1433 | BIGNUM *r[4]; | |
1434 | int nr[4],kn; | |
1435 | BUF_MEM *buf; | |
1436 | EVP_MD_CTX md_ctx; | |
1437 | ||
dbad1690 | 1438 | EVP_MD_CTX_init(&md_ctx); |
d02b48c6 RE |
1439 | if (s->state == SSL3_ST_SW_KEY_EXCH_A) |
1440 | { | |
52b8dad8 | 1441 | type=s->s3->tmp.new_cipher->algorithm_mkey; |
b56bce4f | 1442 | cert=s->cert; |
d02b48c6 RE |
1443 | |
1444 | buf=s->init_buf; | |
1445 | ||
1446 | r[0]=r[1]=r[2]=r[3]=NULL; | |
1447 | n=0; | |
bc36ee62 | 1448 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
1449 | if (type & SSL_kRSA) |
1450 | { | |
1451 | rsa=cert->rsa_tmp; | |
ca8e5b9b | 1452 | if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL)) |
d02b48c6 | 1453 | { |
ca8e5b9b | 1454 | rsa=s->cert->rsa_tmp_cb(s, |
f415fa32 | 1455 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), |
60e31c3a | 1456 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); |
fbb41ae0 DSH |
1457 | if(rsa == NULL) |
1458 | { | |
1459 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1460 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY); | |
1461 | goto f_err; | |
1462 | } | |
6ac4e8bd | 1463 | RSA_up_ref(rsa); |
d02b48c6 RE |
1464 | cert->rsa_tmp=rsa; |
1465 | } | |
1466 | if (rsa == NULL) | |
1467 | { | |
58964a49 | 1468 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1469 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY); |
1470 | goto f_err; | |
1471 | } | |
1472 | r[0]=rsa->n; | |
1473 | r[1]=rsa->e; | |
1474 | s->s3->tmp.use_rsa_tmp=1; | |
1475 | } | |
1476 | else | |
1477 | #endif | |
bc36ee62 | 1478 | #ifndef OPENSSL_NO_DH |
d02b48c6 RE |
1479 | if (type & SSL_kEDH) |
1480 | { | |
1481 | dhp=cert->dh_tmp; | |
ca8e5b9b BM |
1482 | if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL)) |
1483 | dhp=s->cert->dh_tmp_cb(s, | |
2c05c494 | 1484 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), |
60e31c3a | 1485 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); |
d02b48c6 RE |
1486 | if (dhp == NULL) |
1487 | { | |
58964a49 | 1488 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1489 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
1490 | goto f_err; | |
1491 | } | |
a87030a1 BM |
1492 | |
1493 | if (s->s3->tmp.dh != NULL) | |
1494 | { | |
1495 | DH_free(dh); | |
5277d7cb | 1496 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
a87030a1 BM |
1497 | goto err; |
1498 | } | |
1499 | ||
d02b48c6 RE |
1500 | if ((dh=DHparams_dup(dhp)) == NULL) |
1501 | { | |
1502 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1503 | goto err; | |
1504 | } | |
1505 | ||
1506 | s->s3->tmp.dh=dh; | |
6fa89f94 BL |
1507 | if ((dhp->pub_key == NULL || |
1508 | dhp->priv_key == NULL || | |
1509 | (s->options & SSL_OP_SINGLE_DH_USE))) | |
d02b48c6 | 1510 | { |
6fa89f94 BL |
1511 | if(!DH_generate_key(dh)) |
1512 | { | |
1513 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, | |
1514 | ERR_R_DH_LIB); | |
1515 | goto err; | |
1516 | } | |
d02b48c6 RE |
1517 | } |
1518 | else | |
1519 | { | |
1520 | dh->pub_key=BN_dup(dhp->pub_key); | |
1521 | dh->priv_key=BN_dup(dhp->priv_key); | |
1522 | if ((dh->pub_key == NULL) || | |
1523 | (dh->priv_key == NULL)) | |
1524 | { | |
1525 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1526 | goto err; | |
1527 | } | |
1528 | } | |
1529 | r[0]=dh->p; | |
1530 | r[1]=dh->g; | |
1531 | r[2]=dh->pub_key; | |
1532 | } | |
1533 | else | |
1534 | #endif | |
ea262260 | 1535 | #ifndef OPENSSL_NO_ECDH |
89bbe14c | 1536 | if (type & SSL_kEECDH) |
ea262260 | 1537 | { |
9dd84053 NL |
1538 | const EC_GROUP *group; |
1539 | ||
ea262260 BM |
1540 | ecdhp=cert->ecdh_tmp; |
1541 | if ((ecdhp == NULL) && (s->cert->ecdh_tmp_cb != NULL)) | |
1542 | { | |
1543 | ecdhp=s->cert->ecdh_tmp_cb(s, | |
1544 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), | |
1545 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); | |
1546 | } | |
1547 | if (ecdhp == NULL) | |
1548 | { | |
1549 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1550 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); | |
1551 | goto f_err; | |
1552 | } | |
1553 | ||
1554 | if (s->s3->tmp.ecdh != NULL) | |
1555 | { | |
1556 | EC_KEY_free(s->s3->tmp.ecdh); | |
1557 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
1558 | goto err; | |
1559 | } | |
1560 | ||
1561 | /* Duplicate the ECDH structure. */ | |
1562 | if (ecdhp == NULL) | |
1563 | { | |
1564 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1565 | goto err; | |
1566 | } | |
1567 | if (!EC_KEY_up_ref(ecdhp)) | |
1568 | { | |
aa4ce731 | 1569 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); |
ea262260 BM |
1570 | goto err; |
1571 | } | |
1572 | ecdh = ecdhp; | |
1573 | ||
1574 | s->s3->tmp.ecdh=ecdh; | |
9dd84053 NL |
1575 | if ((EC_KEY_get0_public_key(ecdh) == NULL) || |
1576 | (EC_KEY_get0_private_key(ecdh) == NULL) || | |
ea262260 BM |
1577 | (s->options & SSL_OP_SINGLE_ECDH_USE)) |
1578 | { | |
1579 | if(!EC_KEY_generate_key(ecdh)) | |
1580 | { | |
1581 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1582 | goto err; | |
1583 | } | |
1584 | } | |
1585 | ||
9dd84053 NL |
1586 | if (((group = EC_KEY_get0_group(ecdh)) == NULL) || |
1587 | (EC_KEY_get0_public_key(ecdh) == NULL) || | |
1588 | (EC_KEY_get0_private_key(ecdh) == NULL)) | |
ea262260 BM |
1589 | { |
1590 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1591 | goto err; | |
1592 | } | |
1593 | ||
1594 | if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && | |
9dd84053 | 1595 | (EC_GROUP_get_degree(group) > 163)) |
ea262260 BM |
1596 | { |
1597 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); | |
1598 | goto err; | |
1599 | } | |
1600 | ||
1601 | /* XXX: For now, we only support ephemeral ECDH | |
1602 | * keys over named (not generic) curves. For | |
1603 | * supported named curves, curve_id is non-zero. | |
1604 | */ | |
1605 | if ((curve_id = | |
33273721 | 1606 | tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group))) |
ea262260 BM |
1607 | == 0) |
1608 | { | |
1609 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE); | |
1610 | goto err; | |
1611 | } | |
1612 | ||
1613 | /* Encode the public key. | |
1614 | * First check the size of encoding and | |
1615 | * allocate memory accordingly. | |
1616 | */ | |
9dd84053 NL |
1617 | encodedlen = EC_POINT_point2oct(group, |
1618 | EC_KEY_get0_public_key(ecdh), | |
ea262260 BM |
1619 | POINT_CONVERSION_UNCOMPRESSED, |
1620 | NULL, 0, NULL); | |
1621 | ||
1622 | encodedPoint = (unsigned char *) | |
1623 | OPENSSL_malloc(encodedlen*sizeof(unsigned char)); | |
1624 | bn_ctx = BN_CTX_new(); | |
1625 | if ((encodedPoint == NULL) || (bn_ctx == NULL)) | |
1626 | { | |
1627 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); | |
1628 | goto err; | |
1629 | } | |
1630 | ||
1631 | ||
9dd84053 NL |
1632 | encodedlen = EC_POINT_point2oct(group, |
1633 | EC_KEY_get0_public_key(ecdh), | |
ea262260 BM |
1634 | POINT_CONVERSION_UNCOMPRESSED, |
1635 | encodedPoint, encodedlen, bn_ctx); | |
1636 | ||
1637 | if (encodedlen == 0) | |
1638 | { | |
1639 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1640 | goto err; | |
1641 | } | |
1642 | ||
1643 | BN_CTX_free(bn_ctx); bn_ctx=NULL; | |
1644 | ||
1645 | /* XXX: For now, we only support named (not | |
1646 | * generic) curves in ECDH ephemeral key exchanges. | |
d56349a2 | 1647 | * In this situation, we need four additional bytes |
ea262260 BM |
1648 | * to encode the entire ServerECDHParams |
1649 | * structure. | |
1650 | */ | |
d56349a2 | 1651 | n = 4 + encodedlen; |
ea262260 BM |
1652 | |
1653 | /* We'll generate the serverKeyExchange message | |
1654 | * explicitly so we can set these to NULLs | |
1655 | */ | |
1656 | r[0]=NULL; | |
1657 | r[1]=NULL; | |
1658 | r[2]=NULL; | |
d56349a2 | 1659 | r[3]=NULL; |
ea262260 BM |
1660 | } |
1661 | else | |
1662 | #endif /* !OPENSSL_NO_ECDH */ | |
ddac1974 NL |
1663 | #ifndef OPENSSL_NO_PSK |
1664 | if (type & SSL_kPSK) | |
1665 | { | |
1666 | /* reserve size for record length and PSK identity hint*/ | |
1667 | n+=2+strlen(s->ctx->psk_identity_hint); | |
1668 | } | |
1669 | else | |
1670 | #endif /* !OPENSSL_NO_PSK */ | |
d02b48c6 | 1671 | { |
58964a49 | 1672 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1673 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); |
1674 | goto f_err; | |
1675 | } | |
1676 | for (i=0; r[i] != NULL; i++) | |
1677 | { | |
1678 | nr[i]=BN_num_bytes(r[i]); | |
1679 | n+=2+nr[i]; | |
1680 | } | |
1681 | ||
52b8dad8 BM |
1682 | if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) |
1683 | && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) | |
d02b48c6 RE |
1684 | { |
1685 | if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher)) | |
1686 | == NULL) | |
1687 | { | |
58964a49 | 1688 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1689 | goto f_err; |
1690 | } | |
1691 | kn=EVP_PKEY_size(pkey); | |
1692 | } | |
1693 | else | |
1694 | { | |
1695 | pkey=NULL; | |
1696 | kn=0; | |
1697 | } | |
1698 | ||
54a656ef | 1699 | if (!BUF_MEM_grow_clean(buf,n+4+kn)) |
d02b48c6 RE |
1700 | { |
1701 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF); | |
1702 | goto err; | |
1703 | } | |
1704 | d=(unsigned char *)s->init_buf->data; | |
1705 | p= &(d[4]); | |
1706 | ||
1707 | for (i=0; r[i] != NULL; i++) | |
1708 | { | |
1709 | s2n(nr[i],p); | |
1710 | BN_bn2bin(r[i],p); | |
1711 | p+=nr[i]; | |
1712 | } | |
1713 | ||
ea262260 | 1714 | #ifndef OPENSSL_NO_ECDH |
89bbe14c | 1715 | if (type & SSL_kEECDH) |
ea262260 BM |
1716 | { |
1717 | /* XXX: For now, we only support named (not generic) curves. | |
1718 | * In this situation, the serverKeyExchange message has: | |
d56349a2 | 1719 | * [1 byte CurveType], [2 byte CurveName] |
ea262260 BM |
1720 | * [1 byte length of encoded point], followed by |
1721 | * the actual encoded point itself | |
1722 | */ | |
1723 | *p = NAMED_CURVE_TYPE; | |
1724 | p += 1; | |
d56349a2 BM |
1725 | *p = 0; |
1726 | p += 1; | |
ea262260 BM |
1727 | *p = curve_id; |
1728 | p += 1; | |
1729 | *p = encodedlen; | |
1730 | p += 1; | |
1731 | memcpy((unsigned char*)p, | |
1732 | (unsigned char *)encodedPoint, | |
1733 | encodedlen); | |
1734 | OPENSSL_free(encodedPoint); | |
1735 | p += encodedlen; | |
1736 | } | |
1737 | #endif | |
1738 | ||
ddac1974 NL |
1739 | #ifndef OPENSSL_NO_PSK |
1740 | if (type & SSL_kPSK) | |
1741 | { | |
1742 | /* copy PSK identity hint */ | |
1743 | s2n(strlen(s->ctx->psk_identity_hint), p); | |
07ef6129 | 1744 | strncpy((char *)p, s->ctx->psk_identity_hint, strlen(s->ctx->psk_identity_hint)); |
ddac1974 NL |
1745 | p+=strlen(s->ctx->psk_identity_hint); |
1746 | } | |
1747 | #endif | |
1748 | ||
d02b48c6 RE |
1749 | /* not anonymous */ |
1750 | if (pkey != NULL) | |
1751 | { | |
1752 | /* n is the length of the params, they start at &(d[4]) | |
1753 | * and p points to the space at the end. */ | |
bc36ee62 | 1754 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
1755 | if (pkey->type == EVP_PKEY_RSA) |
1756 | { | |
1757 | q=md_buf; | |
1758 | j=0; | |
1759 | for (num=2; num > 0; num--) | |
1760 | { | |
20d2186c DSH |
1761 | EVP_DigestInit_ex(&md_ctx,(num == 2) |
1762 | ?s->ctx->md5:s->ctx->sha1, NULL); | |
d02b48c6 RE |
1763 | EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); |
1764 | EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
1765 | EVP_DigestUpdate(&md_ctx,&(d[4]),n); | |
20d2186c | 1766 | EVP_DigestFinal_ex(&md_ctx,q, |
d02b48c6 RE |
1767 | (unsigned int *)&i); |
1768 | q+=i; | |
1769 | j+=i; | |
1770 | } | |
1c80019a | 1771 | if (RSA_sign(NID_md5_sha1, md_buf, j, |
ca7fea96 | 1772 | &(p[2]), &u, pkey->pkey.rsa) <= 0) |
d02b48c6 RE |
1773 | { |
1774 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA); | |
1775 | goto err; | |
1776 | } | |
ca7fea96 BL |
1777 | s2n(u,p); |
1778 | n+=u+2; | |
d02b48c6 RE |
1779 | } |
1780 | else | |
1781 | #endif | |
bc36ee62 | 1782 | #if !defined(OPENSSL_NO_DSA) |
d02b48c6 RE |
1783 | if (pkey->type == EVP_PKEY_DSA) |
1784 | { | |
1785 | /* lets do DSS */ | |
20d2186c | 1786 | EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL); |
d02b48c6 RE |
1787 | EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); |
1788 | EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
1789 | EVP_SignUpdate(&md_ctx,&(d[4]),n); | |
1790 | if (!EVP_SignFinal(&md_ctx,&(p[2]), | |
1791 | (unsigned int *)&i,pkey)) | |
1792 | { | |
1793 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA); | |
1794 | goto err; | |
1795 | } | |
1796 | s2n(i,p); | |
1797 | n+=i+2; | |
1798 | } | |
1799 | else | |
ea262260 BM |
1800 | #endif |
1801 | #if !defined(OPENSSL_NO_ECDSA) | |
5488bb61 | 1802 | if (pkey->type == EVP_PKEY_EC) |
ea262260 BM |
1803 | { |
1804 | /* let's do ECDSA */ | |
1805 | EVP_SignInit_ex(&md_ctx,EVP_ecdsa(), NULL); | |
1806 | EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); | |
1807 | EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
1808 | EVP_SignUpdate(&md_ctx,&(d[4]),n); | |
1809 | if (!EVP_SignFinal(&md_ctx,&(p[2]), | |
1810 | (unsigned int *)&i,pkey)) | |
1811 | { | |
1812 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_ECDSA); | |
1813 | goto err; | |
1814 | } | |
1815 | s2n(i,p); | |
1816 | n+=i+2; | |
1817 | } | |
1818 | else | |
d02b48c6 RE |
1819 | #endif |
1820 | { | |
1821 | /* Is this error check actually needed? */ | |
58964a49 | 1822 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1823 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE); |
1824 | goto f_err; | |
1825 | } | |
1826 | } | |
1827 | ||
1828 | *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE; | |
1829 | l2n3(n,d); | |
1830 | ||
1831 | /* we should now have things packed up, so lets send | |
1832 | * it off */ | |
1833 | s->init_num=n+4; | |
1834 | s->init_off=0; | |
1835 | } | |
1836 | ||
a87030a1 | 1837 | s->state = SSL3_ST_SW_KEY_EXCH_B; |
dbad1690 | 1838 | EVP_MD_CTX_cleanup(&md_ctx); |
d02b48c6 RE |
1839 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); |
1840 | f_err: | |
1841 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1842 | err: | |
ea262260 BM |
1843 | #ifndef OPENSSL_NO_ECDH |
1844 | if (encodedPoint != NULL) OPENSSL_free(encodedPoint); | |
1845 | BN_CTX_free(bn_ctx); | |
1846 | #endif | |
dbad1690 | 1847 | EVP_MD_CTX_cleanup(&md_ctx); |
d02b48c6 RE |
1848 | return(-1); |
1849 | } | |
1850 | ||
36d16f8e | 1851 | int ssl3_send_certificate_request(SSL *s) |
d02b48c6 RE |
1852 | { |
1853 | unsigned char *p,*d; | |
1854 | int i,j,nl,off,n; | |
f73e07cf | 1855 | STACK_OF(X509_NAME) *sk=NULL; |
d02b48c6 RE |
1856 | X509_NAME *name; |
1857 | BUF_MEM *buf; | |
1858 | ||
1859 | if (s->state == SSL3_ST_SW_CERT_REQ_A) | |
1860 | { | |
1861 | buf=s->init_buf; | |
1862 | ||
1863 | d=p=(unsigned char *)&(buf->data[4]); | |
1864 | ||
1865 | /* get the list of acceptable cert types */ | |
1866 | p++; | |
1867 | n=ssl3_get_req_cert_type(s,p); | |
1868 | d[0]=n; | |
1869 | p+=n; | |
1870 | n++; | |
1871 | ||
1872 | off=n; | |
1873 | p+=2; | |
1874 | n+=2; | |
1875 | ||
1876 | sk=SSL_get_client_CA_list(s); | |
1877 | nl=0; | |
1878 | if (sk != NULL) | |
1879 | { | |
f73e07cf | 1880 | for (i=0; i<sk_X509_NAME_num(sk); i++) |
d02b48c6 | 1881 | { |
f73e07cf | 1882 | name=sk_X509_NAME_value(sk,i); |
d02b48c6 | 1883 | j=i2d_X509_NAME(name,NULL); |
54a656ef | 1884 | if (!BUF_MEM_grow_clean(buf,4+n+j+2)) |
d02b48c6 RE |
1885 | { |
1886 | SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB); | |
1887 | goto err; | |
1888 | } | |
1889 | p=(unsigned char *)&(buf->data[4+n]); | |
58964a49 | 1890 | if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) |
d02b48c6 RE |
1891 | { |
1892 | s2n(j,p); | |
1893 | i2d_X509_NAME(name,&p); | |
1894 | n+=2+j; | |
1895 | nl+=2+j; | |
1896 | } | |
1897 | else | |
1898 | { | |
1899 | d=p; | |
1900 | i2d_X509_NAME(name,&p); | |
1901 | j-=2; s2n(j,d); j+=2; | |
1902 | n+=j; | |
1903 | nl+=j; | |
1904 | } | |
1905 | } | |
1906 | } | |
1907 | /* else no CA names */ | |
1908 | p=(unsigned char *)&(buf->data[4+off]); | |
1909 | s2n(nl,p); | |
1910 | ||
1911 | d=(unsigned char *)buf->data; | |
1912 | *(d++)=SSL3_MT_CERTIFICATE_REQUEST; | |
1913 | l2n3(n,d); | |
1914 | ||
1915 | /* we should now have things packed up, so lets send | |
1916 | * it off */ | |
1917 | ||
1918 | s->init_num=n+4; | |
1919 | s->init_off=0; | |
de469ef2 DSH |
1920 | #ifdef NETSCAPE_HANG_BUG |
1921 | p=(unsigned char *)s->init_buf->data + s->init_num; | |
1922 | ||
1923 | /* do the header */ | |
1924 | *(p++)=SSL3_MT_SERVER_DONE; | |
1925 | *(p++)=0; | |
1926 | *(p++)=0; | |
1927 | *(p++)=0; | |
1928 | s->init_num += 4; | |
1929 | #endif | |
1930 | ||
e59659dc | 1931 | s->state = SSL3_ST_SW_CERT_REQ_B; |
d02b48c6 RE |
1932 | } |
1933 | ||
1934 | /* SSL3_ST_SW_CERT_REQ_B */ | |
1935 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
1936 | err: | |
1937 | return(-1); | |
1938 | } | |
1939 | ||
36d16f8e | 1940 | int ssl3_get_client_key_exchange(SSL *s) |
d02b48c6 RE |
1941 | { |
1942 | int i,al,ok; | |
1943 | long n; | |
52b8dad8 | 1944 | unsigned long alg_k; |
d02b48c6 | 1945 | unsigned char *p; |
bc36ee62 | 1946 | #ifndef OPENSSL_NO_RSA |
d02b48c6 | 1947 | RSA *rsa=NULL; |
d02b48c6 | 1948 | EVP_PKEY *pkey=NULL; |
79df9d62 | 1949 | #endif |
bc36ee62 | 1950 | #ifndef OPENSSL_NO_DH |
58964a49 | 1951 | BIGNUM *pub=NULL; |
d02b48c6 | 1952 | DH *dh_srvr; |
58964a49 | 1953 | #endif |
bc36ee62 | 1954 | #ifndef OPENSSL_NO_KRB5 |
52b8dad8 | 1955 | KSSL_ERR kssl_err; |
bc36ee62 | 1956 | #endif /* OPENSSL_NO_KRB5 */ |
d02b48c6 | 1957 | |
ea262260 BM |
1958 | #ifndef OPENSSL_NO_ECDH |
1959 | EC_KEY *srvr_ecdh = NULL; | |
1960 | EVP_PKEY *clnt_pub_pkey = NULL; | |
1961 | EC_POINT *clnt_ecpoint = NULL; | |
1962 | BN_CTX *bn_ctx = NULL; | |
1963 | #endif | |
1964 | ||
36d16f8e | 1965 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
1966 | SSL3_ST_SR_KEY_EXCH_A, |
1967 | SSL3_ST_SR_KEY_EXCH_B, | |
1968 | SSL3_MT_CLIENT_KEY_EXCHANGE, | |
73969585 | 1969 | 2048, /* ??? */ |
d02b48c6 RE |
1970 | &ok); |
1971 | ||
1972 | if (!ok) return((int)n); | |
48948d53 | 1973 | p=(unsigned char *)s->init_msg; |
d02b48c6 | 1974 | |
52b8dad8 | 1975 | alg_k=s->s3->tmp.new_cipher->algorithm_mkey; |
d02b48c6 | 1976 | |
bc36ee62 | 1977 | #ifndef OPENSSL_NO_RSA |
52b8dad8 | 1978 | if (alg_k & SSL_kRSA) |
d02b48c6 RE |
1979 | { |
1980 | /* FIX THIS UP EAY EAY EAY EAY */ | |
1981 | if (s->s3->tmp.use_rsa_tmp) | |
1982 | { | |
b56bce4f | 1983 | if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL)) |
ca8e5b9b | 1984 | rsa=s->cert->rsa_tmp; |
d02b48c6 RE |
1985 | /* Don't do a callback because rsa_tmp should |
1986 | * be sent already */ | |
1987 | if (rsa == NULL) | |
1988 | { | |
58964a49 | 1989 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1990 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY); |
1991 | goto f_err; | |
1992 | ||
1993 | } | |
1994 | } | |
1995 | else | |
1996 | { | |
1997 | pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey; | |
1998 | if ( (pkey == NULL) || | |
1999 | (pkey->type != EVP_PKEY_RSA) || | |
2000 | (pkey->pkey.rsa == NULL)) | |
2001 | { | |
58964a49 | 2002 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
2003 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE); |
2004 | goto f_err; | |
2005 | } | |
2006 | rsa=pkey->pkey.rsa; | |
2007 | } | |
2008 | ||
7432d073 | 2009 | /* TLS and [incidentally] DTLS{0xFEFF} */ |
b452f433 | 2010 | if (s->version > SSL3_VERSION && s->version != DTLS1_BAD_VER) |
58964a49 RE |
2011 | { |
2012 | n2s(p,i); | |
2013 | if (n != i+2) | |
2014 | { | |
2015 | if (!(s->options & SSL_OP_TLS_D5_BUG)) | |
2016 | { | |
2017 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG); | |
2018 | goto err; | |
2019 | } | |
2020 | else | |
2021 | p-=2; | |
2022 | } | |
2023 | else | |
2024 | n=i; | |
2025 | } | |
2026 | ||
d02b48c6 | 2027 | i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING); |
58964a49 | 2028 | |
31bc51c8 BM |
2029 | al = -1; |
2030 | ||
d02b48c6 RE |
2031 | if (i != SSL_MAX_MASTER_KEY_LENGTH) |
2032 | { | |
2033 | al=SSL_AD_DECODE_ERROR; | |
02da5bcd | 2034 | /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); */ |
d02b48c6 RE |
2035 | } |
2036 | ||
31bc51c8 | 2037 | if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff)))) |
d02b48c6 | 2038 | { |
2c05c494 BM |
2039 | /* The premaster secret must contain the same version number as the |
2040 | * ClientHello to detect version rollback attacks (strangely, the | |
2041 | * protocol does not offer such protection for DH ciphersuites). | |
2042 | * However, buggy clients exist that send the negotiated protocol | |
93d8bfcd | 2043 | * version instead if the server does not support the requested |
2c05c494 BM |
2044 | * protocol version. |
2045 | * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */ | |
2046 | if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) && | |
2047 | (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff)))) | |
2048 | { | |
2049 | al=SSL_AD_DECODE_ERROR; | |
02da5bcd BM |
2050 | /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER); */ |
2051 | ||
2052 | /* The Klima-Pokorny-Rosa extension of Bleichenbacher's attack | |
2053 | * (http://eprint.iacr.org/2003/052/) exploits the version | |
2054 | * number check as a "bad version oracle" -- an alert would | |
2055 | * reveal that the plaintext corresponding to some ciphertext | |
2056 | * made up by the adversary is properly formatted except | |
2057 | * that the version number is wrong. To avoid such attacks, | |
2058 | * we should treat this just like any other decryption error. */ | |
2c05c494 | 2059 | } |
d02b48c6 | 2060 | } |
d02b48c6 | 2061 | |
31bc51c8 BM |
2062 | if (al != -1) |
2063 | { | |
31bc51c8 BM |
2064 | /* Some decryption failure -- use random value instead as countermeasure |
2065 | * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding | |
02da5bcd | 2066 | * (see RFC 2246, section 7.4.7.1). */ |
31bc51c8 BM |
2067 | ERR_clear_error(); |
2068 | i = SSL_MAX_MASTER_KEY_LENGTH; | |
2069 | p[0] = s->client_version >> 8; | |
2070 | p[1] = s->client_version & 0xff; | |
7c7667b8 NL |
2071 | if (RAND_pseudo_bytes(p+2, i-2) <= 0) /* should be RAND_bytes, but we cannot work around a failure */ |
2072 | goto err; | |
31bc51c8 BM |
2073 | } |
2074 | ||
d02b48c6 | 2075 | s->session->master_key_length= |
58964a49 | 2076 | s->method->ssl3_enc->generate_master_secret(s, |
d02b48c6 RE |
2077 | s->session->master_key, |
2078 | p,i); | |
43d60164 | 2079 | OPENSSL_cleanse(p,i); |
d02b48c6 RE |
2080 | } |
2081 | else | |
4c5fac4a | 2082 | #endif |
bc36ee62 | 2083 | #ifndef OPENSSL_NO_DH |
52b8dad8 | 2084 | if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) |
d02b48c6 | 2085 | { |
d02b48c6 RE |
2086 | n2s(p,i); |
2087 | if (n != i+2) | |
2088 | { | |
58964a49 | 2089 | if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG)) |
d02b48c6 RE |
2090 | { |
2091 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG); | |
2092 | goto err; | |
2093 | } | |
2094 | else | |
2095 | { | |
2096 | p-=2; | |
2097 | i=(int)n; | |
2098 | } | |
2099 | } | |
2100 | ||
2101 | if (n == 0L) /* the parameters are in the cert */ | |
2102 | { | |
58964a49 | 2103 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
2104 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS); |
2105 | goto f_err; | |
2106 | } | |
2107 | else | |
2108 | { | |
2109 | if (s->s3->tmp.dh == NULL) | |
2110 | { | |
58964a49 | 2111 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
2112 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
2113 | goto f_err; | |
2114 | } | |
2115 | else | |
2116 | dh_srvr=s->s3->tmp.dh; | |
2117 | } | |
2118 | ||
2119 | pub=BN_bin2bn(p,i,NULL); | |
2120 | if (pub == NULL) | |
2121 | { | |
2122 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB); | |
2123 | goto err; | |
2124 | } | |
58964a49 | 2125 | |
d02b48c6 RE |
2126 | i=DH_compute_key(p,pub,dh_srvr); |
2127 | ||
2128 | if (i <= 0) | |
2129 | { | |
2130 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); | |
2131 | goto err; | |
2132 | } | |
2133 | ||
2134 | DH_free(s->s3->tmp.dh); | |
2135 | s->s3->tmp.dh=NULL; | |
2136 | ||
2137 | BN_clear_free(pub); | |
2138 | pub=NULL; | |
2139 | s->session->master_key_length= | |
58964a49 | 2140 | s->method->ssl3_enc->generate_master_secret(s, |
d02b48c6 | 2141 | s->session->master_key,p,i); |
43d60164 | 2142 | OPENSSL_cleanse(p,i); |
d02b48c6 RE |
2143 | } |
2144 | else | |
2145 | #endif | |
bc36ee62 | 2146 | #ifndef OPENSSL_NO_KRB5 |
52b8dad8 BM |
2147 | if (alg_k & SSL_kKRB5) |
2148 | { | |
2149 | krb5_error_code krb5rc; | |
2a1ef754 RL |
2150 | krb5_data enc_ticket; |
2151 | krb5_data authenticator; | |
2152 | krb5_data enc_pms; | |
52b8dad8 | 2153 | KSSL_CTX *kssl_ctx = s->kssl_ctx; |
2a1ef754 | 2154 | EVP_CIPHER_CTX ciph_ctx; |
21fb688d | 2155 | const EVP_CIPHER *enc = NULL; |
2a1ef754 | 2156 | unsigned char iv[EVP_MAX_IV_LENGTH]; |
acdf4afb | 2157 | unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH |
52b8dad8 BM |
2158 | + EVP_MAX_BLOCK_LENGTH]; |
2159 | int padl, outl; | |
2a1ef754 RL |
2160 | krb5_timestamp authtime = 0; |
2161 | krb5_ticket_times ttimes; | |
f9b3bff6 | 2162 | |
de941e28 DSH |
2163 | EVP_CIPHER_CTX_init(&ciph_ctx); |
2164 | ||
52b8dad8 | 2165 | if (!kssl_ctx) kssl_ctx = kssl_ctx_new(); |
2a1ef754 RL |
2166 | |
2167 | n2s(p,i); | |
2168 | enc_ticket.length = i; | |
9e5790ce | 2169 | |
b61a84c8 | 2170 | if (n < (long)(enc_ticket.length + 6)) |
9e5790ce NL |
2171 | { |
2172 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2173 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2174 | goto err; | |
2175 | } | |
2176 | ||
0b4c91c0 | 2177 | enc_ticket.data = (char *)p; |
2a1ef754 RL |
2178 | p+=enc_ticket.length; |
2179 | ||
2180 | n2s(p,i); | |
2181 | authenticator.length = i; | |
9e5790ce | 2182 | |
b61a84c8 | 2183 | if (n < (long)(enc_ticket.length + authenticator.length + 6)) |
9e5790ce NL |
2184 | { |
2185 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2186 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2187 | goto err; | |
2188 | } | |
2189 | ||
0b4c91c0 | 2190 | authenticator.data = (char *)p; |
2a1ef754 RL |
2191 | p+=authenticator.length; |
2192 | ||
2193 | n2s(p,i); | |
2194 | enc_pms.length = i; | |
0b4c91c0 | 2195 | enc_pms.data = (char *)p; |
2a1ef754 RL |
2196 | p+=enc_pms.length; |
2197 | ||
c046fffa LJ |
2198 | /* Note that the length is checked again below, |
2199 | ** after decryption | |
2200 | */ | |
dd7ab82e | 2201 | if(enc_pms.length > sizeof pms) |
c046fffa LJ |
2202 | { |
2203 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2204 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2205 | goto err; | |
2206 | } | |
2207 | ||
0858b71b DSH |
2208 | if (n != (long)(enc_ticket.length + authenticator.length + |
2209 | enc_pms.length + 6)) | |
2a1ef754 RL |
2210 | { |
2211 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2212 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2213 | goto err; | |
2214 | } | |
2215 | ||
52b8dad8 | 2216 | if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes, |
2a1ef754 | 2217 | &kssl_err)) != 0) |
52b8dad8 | 2218 | { |
f9b3bff6 | 2219 | #ifdef KSSL_DEBUG |
52b8dad8 BM |
2220 | printf("kssl_sget_tkt rtn %d [%d]\n", |
2221 | krb5rc, kssl_err.reason); | |
2222 | if (kssl_err.text) | |
2223 | printf("kssl_err text= %s\n", kssl_err.text); | |
f9b3bff6 | 2224 | #endif /* KSSL_DEBUG */ |
52b8dad8 BM |
2225 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2226 | kssl_err.reason); | |
2227 | goto err; | |
2228 | } | |
f9b3bff6 | 2229 | |
2a1ef754 RL |
2230 | /* Note: no authenticator is not considered an error, |
2231 | ** but will return authtime == 0. | |
2232 | */ | |
2233 | if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator, | |
2234 | &authtime, &kssl_err)) != 0) | |
2235 | { | |
2236 | #ifdef KSSL_DEBUG | |
52b8dad8 BM |
2237 | printf("kssl_check_authent rtn %d [%d]\n", |
2238 | krb5rc, kssl_err.reason); | |
2239 | if (kssl_err.text) | |
2240 | printf("kssl_err text= %s\n", kssl_err.text); | |
2a1ef754 | 2241 | #endif /* KSSL_DEBUG */ |
52b8dad8 BM |
2242 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2243 | kssl_err.reason); | |
2244 | goto err; | |
2a1ef754 RL |
2245 | } |
2246 | ||
2247 | if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0) | |
2248 | { | |
aa4ce731 | 2249 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, krb5rc); |
52b8dad8 | 2250 | goto err; |
2a1ef754 RL |
2251 | } |
2252 | ||
f9b3bff6 | 2253 | #ifdef KSSL_DEBUG |
52b8dad8 | 2254 | kssl_ctx_show(kssl_ctx); |
f9b3bff6 RL |
2255 | #endif /* KSSL_DEBUG */ |
2256 | ||
2a1ef754 | 2257 | enc = kssl_map_enc(kssl_ctx->enctype); |
52b8dad8 BM |
2258 | if (enc == NULL) |
2259 | goto err; | |
882e8912 | 2260 | |
54a656ef | 2261 | memset(iv, 0, sizeof iv); /* per RFC 1510 */ |
2a1ef754 | 2262 | |
db6a87d8 | 2263 | if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv)) |
acdf4afb RL |
2264 | { |
2265 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2266 | SSL_R_DECRYPTION_FAILED); | |
2267 | goto err; | |
2268 | } | |
2269 | if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl, | |
0b4c91c0 | 2270 | (unsigned char *)enc_pms.data, enc_pms.length)) |
acdf4afb RL |
2271 | { |
2272 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2273 | SSL_R_DECRYPTION_FAILED); | |
2274 | goto err; | |
2275 | } | |
2a1ef754 RL |
2276 | if (outl > SSL_MAX_MASTER_KEY_LENGTH) |
2277 | { | |
2278 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2279 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2280 | goto err; | |
2281 | } | |
581f1c84 | 2282 | if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl)) |
acdf4afb RL |
2283 | { |
2284 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2285 | SSL_R_DECRYPTION_FAILED); | |
2286 | goto err; | |
2287 | } | |
2a1ef754 RL |
2288 | outl += padl; |
2289 | if (outl > SSL_MAX_MASTER_KEY_LENGTH) | |
2290 | { | |
2291 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2292 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2293 | goto err; | |
2294 | } | |
fbe2c6b3 | 2295 | if (!((pms[0] == (s->client_version>>8)) && (pms[1] == (s->client_version & 0xff)))) |
cbb92dfa RL |
2296 | { |
2297 | /* The premaster secret must contain the same version number as the | |
2298 | * ClientHello to detect version rollback attacks (strangely, the | |
2299 | * protocol does not offer such protection for DH ciphersuites). | |
2300 | * However, buggy clients exist that send random bytes instead of | |
2301 | * the protocol version. | |
2302 | * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. | |
2303 | * (Perhaps we should have a separate BUG value for the Kerberos cipher) | |
2304 | */ | |
fbe2c6b3 | 2305 | if (!(s->options & SSL_OP_TLS_ROLLBACK_BUG)) |
52b8dad8 | 2306 | { |
cbb92dfa RL |
2307 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2308 | SSL_AD_DECODE_ERROR); | |
2309 | goto err; | |
2310 | } | |
2311 | } | |
2312 | ||
2a1ef754 RL |
2313 | EVP_CIPHER_CTX_cleanup(&ciph_ctx); |
2314 | ||
52b8dad8 BM |
2315 | s->session->master_key_length= |
2316 | s->method->ssl3_enc->generate_master_secret(s, | |
2317 | s->session->master_key, pms, outl); | |
2a1ef754 | 2318 | |
52b8dad8 BM |
2319 | if (kssl_ctx->client_princ) |
2320 | { | |
2321 | size_t len = strlen(kssl_ctx->client_princ); | |
2322 | if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH ) | |
2323 | { | |
2324 | s->session->krb5_client_princ_len = len; | |
2325 | memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len); | |
2326 | } | |
2327 | } | |
882e8912 RL |
2328 | |
2329 | ||
52b8dad8 | 2330 | /* Was doing kssl_ctx_free() here, |
2a1ef754 | 2331 | ** but it caused problems for apache. |
52b8dad8 BM |
2332 | ** kssl_ctx = kssl_ctx_free(kssl_ctx); |
2333 | ** if (s->kssl_ctx) s->kssl_ctx = NULL; | |
2334 | */ | |
2335 | } | |
f9b3bff6 | 2336 | else |
bc36ee62 | 2337 | #endif /* OPENSSL_NO_KRB5 */ |
ea262260 BM |
2338 | |
2339 | #ifndef OPENSSL_NO_ECDH | |
52b8dad8 | 2340 | if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) |
ea262260 BM |
2341 | { |
2342 | int ret = 1; | |
968766ca | 2343 | int field_size = 0; |
9dd84053 NL |
2344 | const EC_KEY *tkey; |
2345 | const EC_GROUP *group; | |
2346 | const BIGNUM *priv_key; | |
ea262260 | 2347 | |
52b8dad8 | 2348 | /* initialize structures for server's ECDH key pair */ |
ea262260 BM |
2349 | if ((srvr_ecdh = EC_KEY_new()) == NULL) |
2350 | { | |
52b8dad8 | 2351 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
ea262260 | 2352 | ERR_R_MALLOC_FAILURE); |
52b8dad8 | 2353 | goto err; |
ea262260 BM |
2354 | } |
2355 | ||
2356 | /* Let's get server private key and group information */ | |
52b8dad8 | 2357 | if (alg_k & (SSL_kECDHr|SSL_kECDHe)) |
ea262260 | 2358 | { |
52b8dad8 | 2359 | /* use the certificate */ |
feaaf1db | 2360 | tkey = s->cert->pkeys[SSL_PKEY_ECC].privatekey->pkey.ec; |
ea262260 BM |
2361 | } |
2362 | else | |
2363 | { | |
2364 | /* use the ephermeral values we saved when | |
2365 | * generating the ServerKeyExchange msg. | |
2366 | */ | |
9dd84053 NL |
2367 | tkey = s->s3->tmp.ecdh; |
2368 | } | |
2369 | ||
2370 | group = EC_KEY_get0_group(tkey); | |
2371 | priv_key = EC_KEY_get0_private_key(tkey); | |
2372 | ||
2373 | if (!EC_KEY_set_group(srvr_ecdh, group) || | |
2374 | !EC_KEY_set_private_key(srvr_ecdh, priv_key)) | |
2375 | { | |
2376 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2377 | ERR_R_EC_LIB); | |
2378 | goto err; | |
ea262260 BM |
2379 | } |
2380 | ||
2381 | /* Let's get client's public key */ | |
9dd84053 | 2382 | if ((clnt_ecpoint = EC_POINT_new(group)) == NULL) |
ea262260 BM |
2383 | { |
2384 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2385 | ERR_R_MALLOC_FAILURE); | |
2386 | goto err; | |
2387 | } | |
2388 | ||
52b8dad8 BM |
2389 | if (n == 0L) |
2390 | { | |
ea262260 BM |
2391 | /* Client Publickey was in Client Certificate */ |
2392 | ||
52b8dad8 | 2393 | if (alg_k & SSL_kEECDH) |
ea262260 BM |
2394 | { |
2395 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2396 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); | |
2397 | goto f_err; | |
2398 | } | |
52b8dad8 | 2399 | if (((clnt_pub_pkey=X509_get_pubkey(s->session->peer)) |
ea262260 | 2400 | == NULL) || |
5488bb61 | 2401 | (clnt_pub_pkey->type != EVP_PKEY_EC)) |
52b8dad8 | 2402 | { |
ea262260 BM |
2403 | /* XXX: For now, we do not support client |
2404 | * authentication using ECDH certificates | |
2405 | * so this branch (n == 0L) of the code is | |
2406 | * never executed. When that support is | |
2407 | * added, we ought to ensure the key | |
2408 | * received in the certificate is | |
2409 | * authorized for key agreement. | |
2410 | * ECDH_compute_key implicitly checks that | |
2411 | * the two ECDH shares are for the same | |
2412 | * group. | |
2413 | */ | |
52b8dad8 BM |
2414 | al=SSL_AD_HANDSHAKE_FAILURE; |
2415 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
ea262260 | 2416 | SSL_R_UNABLE_TO_DECODE_ECDH_CERTS); |
52b8dad8 BM |
2417 | goto f_err; |
2418 | } | |
ea262260 | 2419 | |
8c5a2bd6 NL |
2420 | if (EC_POINT_copy(clnt_ecpoint, |
2421 | EC_KEY_get0_public_key(clnt_pub_pkey->pkey.ec)) == 0) | |
2422 | { | |
2423 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2424 | ERR_R_EC_LIB); | |
2425 | goto err; | |
2426 | } | |
52b8dad8 BM |
2427 | ret = 2; /* Skip certificate verify processing */ |
2428 | } | |
2429 | else | |
2430 | { | |
ea262260 BM |
2431 | /* Get client's public key from encoded point |
2432 | * in the ClientKeyExchange message. | |
2433 | */ | |
2434 | if ((bn_ctx = BN_CTX_new()) == NULL) | |
2435 | { | |
2436 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2437 | ERR_R_MALLOC_FAILURE); | |
2438 | goto err; | |
2439 | } | |
2440 | ||
52b8dad8 BM |
2441 | /* Get encoded point length */ |
2442 | i = *p; | |
ea262260 | 2443 | p += 1; |
52b8dad8 | 2444 | if (EC_POINT_oct2point(group, |
ea262260 BM |
2445 | clnt_ecpoint, p, i, bn_ctx) == 0) |
2446 | { | |
2447 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2448 | ERR_R_EC_LIB); | |
2449 | goto err; | |
2450 | } | |
52b8dad8 BM |
2451 | /* p is pointing to somewhere in the buffer |
2452 | * currently, so set it to the start | |
2453 | */ | |
2454 | p=(unsigned char *)s->init_buf->data; | |
2455 | } | |
ea262260 BM |
2456 | |
2457 | /* Compute the shared pre-master secret */ | |
9dd84053 | 2458 | field_size = EC_GROUP_get_degree(group); |
968766ca BM |
2459 | if (field_size <= 0) |
2460 | { | |
2461 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2462 | ERR_R_ECDH_LIB); | |
2463 | goto err; | |
2464 | } | |
d56349a2 | 2465 | i = ECDH_compute_key(p, (field_size+7)/8, clnt_ecpoint, srvr_ecdh, NULL); |
52b8dad8 BM |
2466 | if (i <= 0) |
2467 | { | |
2468 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
ea262260 | 2469 | ERR_R_ECDH_LIB); |
52b8dad8 BM |
2470 | goto err; |
2471 | } | |
ea262260 BM |
2472 | |
2473 | EVP_PKEY_free(clnt_pub_pkey); | |
2474 | EC_POINT_free(clnt_ecpoint); | |
4a94003a | 2475 | EC_KEY_free(srvr_ecdh); |
ea262260 | 2476 | BN_CTX_free(bn_ctx); |
55708796 DSH |
2477 | EC_KEY_free(s->s3->tmp.ecdh); |
2478 | s->s3->tmp.ecdh = NULL; | |
ea262260 BM |
2479 | |
2480 | /* Compute the master secret */ | |
52b8dad8 | 2481 | s->session->master_key_length = s->method->ssl3_enc-> \ |
ea262260 BM |
2482 | generate_master_secret(s, s->session->master_key, p, i); |
2483 | ||
52b8dad8 BM |
2484 | OPENSSL_cleanse(p, i); |
2485 | return (ret); | |
ea262260 BM |
2486 | } |
2487 | else | |
ddac1974 NL |
2488 | #endif |
2489 | #ifndef OPENSSL_NO_PSK | |
52b8dad8 | 2490 | if (alg_k & SSL_kPSK) |
ddac1974 NL |
2491 | { |
2492 | unsigned char *t = NULL; | |
2493 | unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; | |
2494 | unsigned int pre_ms_len = 0, psk_len = 0; | |
2495 | int psk_err = 1; | |
2496 | char tmp_id[PSK_MAX_IDENTITY_LEN+1]; | |
2497 | ||
2498 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2499 | ||
2500 | n2s(p,i); | |
2501 | if (n != i+2) | |
2502 | { | |
2503 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2504 | SSL_R_LENGTH_MISMATCH); | |
2505 | goto psk_err; | |
2506 | } | |
2507 | if (i > PSK_MAX_IDENTITY_LEN) | |
2508 | { | |
2509 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2510 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2511 | goto psk_err; | |
2512 | } | |
2513 | if (s->psk_server_callback == NULL) | |
2514 | { | |
2515 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2516 | SSL_R_PSK_NO_SERVER_CB); | |
2517 | goto psk_err; | |
2518 | } | |
2519 | ||
2520 | /* Create guaranteed NULL-terminated identity | |
2521 | * string for the callback */ | |
2522 | memcpy(tmp_id, p, i); | |
2523 | memset(tmp_id+i, 0, PSK_MAX_IDENTITY_LEN+1-i); | |
2524 | psk_len = s->psk_server_callback(s, tmp_id, | |
2525 | psk_or_pre_ms, sizeof(psk_or_pre_ms)); | |
2526 | OPENSSL_cleanse(tmp_id, PSK_MAX_IDENTITY_LEN+1); | |
2527 | ||
2528 | if (psk_len > PSK_MAX_PSK_LEN) | |
2529 | { | |
2530 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2531 | ERR_R_INTERNAL_ERROR); | |
2532 | goto psk_err; | |
2533 | } | |
2534 | else if (psk_len == 0) | |
2535 | { | |
2536 | /* PSK related to the given identity not found */ | |
2537 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2538 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
2539 | al=SSL_AD_UNKNOWN_PSK_IDENTITY; | |
2540 | goto psk_err; | |
2541 | } | |
2542 | ||
2543 | /* create PSK pre_master_secret */ | |
2544 | pre_ms_len=2+psk_len+2+psk_len; | |
2545 | t = psk_or_pre_ms; | |
2546 | memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); | |
2547 | s2n(psk_len, t); | |
2548 | memset(t, 0, psk_len); | |
2549 | t+=psk_len; | |
2550 | s2n(psk_len, t); | |
2551 | ||
2552 | if (s->session->psk_identity != NULL) | |
2553 | OPENSSL_free(s->session->psk_identity); | |
07ef6129 | 2554 | s->session->psk_identity = BUF_strdup((char *)p); |
ddac1974 NL |
2555 | if (s->session->psk_identity == NULL) |
2556 | { | |
2557 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2558 | ERR_R_MALLOC_FAILURE); | |
2559 | goto psk_err; | |
2560 | } | |
2561 | ||
2562 | if (s->session->psk_identity_hint != NULL) | |
2563 | OPENSSL_free(s->session->psk_identity_hint); | |
2564 | s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); | |
2565 | if (s->ctx->psk_identity_hint != NULL && | |
2566 | s->session->psk_identity_hint == NULL) | |
2567 | { | |
2568 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2569 | ERR_R_MALLOC_FAILURE); | |
2570 | goto psk_err; | |
2571 | } | |
2572 | ||
2573 | s->session->master_key_length= | |
2574 | s->method->ssl3_enc->generate_master_secret(s, | |
2575 | s->session->master_key, psk_or_pre_ms, pre_ms_len); | |
2576 | psk_err = 0; | |
2577 | psk_err: | |
2578 | OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); | |
52b8dad8 BM |
2579 | if (psk_err != 0) |
2580 | goto f_err; | |
ddac1974 NL |
2581 | } |
2582 | else | |
ea262260 | 2583 | #endif |
0e1dba93 | 2584 | if (alg_k & SSL_kGOST) |
bfd502f0 DSH |
2585 | { |
2586 | int ret = 0; | |
0e1dba93 | 2587 | EVP_PKEY_CTX *pkey_ctx; |
d36c7b61 | 2588 | EVP_PKEY *client_pub_pkey = NULL, *pk = NULL; |
bfd502f0 | 2589 | unsigned char premaster_secret[32], *start; |
d36c7b61 DSH |
2590 | size_t outlen=32, inlen; |
2591 | unsigned long alg_a; | |
0e1dba93 | 2592 | |
bfd502f0 | 2593 | /* Get our certificate private key*/ |
d36c7b61 DSH |
2594 | alg_a = s->s3->tmp.new_cipher->algorithm_auth; |
2595 | if (alg_a & SSL_aGOST94) | |
2596 | pk = s->cert->pkeys[SSL_PKEY_GOST94].privatekey; | |
2597 | else if (alg_a & SSL_aGOST01) | |
2598 | pk = s->cert->pkeys[SSL_PKEY_GOST01].privatekey; | |
2599 | ||
2600 | pkey_ctx = EVP_PKEY_CTX_new(pk,NULL); | |
0e1dba93 | 2601 | EVP_PKEY_decrypt_init(pkey_ctx); |
bfd502f0 DSH |
2602 | /* If client certificate is present and is of the same type, maybe |
2603 | * use it for key exchange. Don't mind errors from | |
2604 | * EVP_PKEY_derive_set_peer, because it is completely valid to use | |
2605 | * a client certificate for authorization only. */ | |
2606 | client_pub_pkey = X509_get_pubkey(s->session->peer); | |
2607 | if (client_pub_pkey) | |
2608 | { | |
2609 | if (EVP_PKEY_derive_set_peer(pkey_ctx, client_pub_pkey) <= 0) | |
2610 | ERR_clear_error(); | |
2611 | } | |
0e1dba93 | 2612 | /* Decrypt session key */ |
bfd502f0 | 2613 | if ((*p!=( V_ASN1_SEQUENCE| V_ASN1_CONSTRUCTED))) |
0e1dba93 DSH |
2614 | { |
2615 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED); | |
bfd502f0 DSH |
2616 | goto gerr; |
2617 | } | |
2618 | if (p[1] == 0x81) | |
2619 | { | |
2620 | start = p+3; | |
2621 | inlen = p[2]; | |
2622 | } | |
2623 | else if (p[1] < 0x80) | |
2624 | { | |
2625 | start = p+2; | |
2626 | inlen = p[1]; | |
2627 | } | |
2628 | else | |
2629 | { | |
2630 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED); | |
2631 | goto gerr; | |
2632 | } | |
2633 | if (EVP_PKEY_decrypt(pkey_ctx,premaster_secret,&outlen,start,inlen) <=0) | |
0e1dba93 DSH |
2634 | |
2635 | { | |
2636 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED); | |
bfd502f0 | 2637 | goto gerr; |
0e1dba93 DSH |
2638 | } |
2639 | /* Generate master secret */ | |
0e1dba93 DSH |
2640 | s->session->master_key_length= |
2641 | s->method->ssl3_enc->generate_master_secret(s, | |
2642 | s->session->master_key,premaster_secret,32); | |
bfd502f0 DSH |
2643 | /* Check if pubkey from client certificate was used */ |
2644 | if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) | |
2645 | ret = 2; | |
2646 | else | |
2647 | ret = 1; | |
2648 | gerr: | |
2649 | EVP_PKEY_free(client_pub_pkey); | |
2650 | EVP_PKEY_CTX_free(pkey_ctx); | |
2651 | if (ret) | |
2652 | return ret; | |
2653 | else | |
2654 | goto err; | |
2655 | } | |
0e1dba93 | 2656 | else |
d02b48c6 | 2657 | { |
58964a49 | 2658 | al=SSL_AD_HANDSHAKE_FAILURE; |
2a1ef754 RL |
2659 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2660 | SSL_R_UNKNOWN_CIPHER_TYPE); | |
d02b48c6 RE |
2661 | goto f_err; |
2662 | } | |
2663 | ||
2664 | return(1); | |
2665 | f_err: | |
2666 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
ea262260 | 2667 | #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_ECDH) |
d02b48c6 | 2668 | err: |
ea262260 | 2669 | #endif |
d020e701 | 2670 | #ifndef OPENSSL_NO_ECDH |
ea262260 BM |
2671 | EVP_PKEY_free(clnt_pub_pkey); |
2672 | EC_POINT_free(clnt_ecpoint); | |
2673 | if (srvr_ecdh != NULL) | |
ea262260 | 2674 | EC_KEY_free(srvr_ecdh); |
ea262260 | 2675 | BN_CTX_free(bn_ctx); |
58964a49 | 2676 | #endif |
d02b48c6 RE |
2677 | return(-1); |
2678 | } | |
2679 | ||
36d16f8e | 2680 | int ssl3_get_cert_verify(SSL *s) |
d02b48c6 RE |
2681 | { |
2682 | EVP_PKEY *pkey=NULL; | |
2683 | unsigned char *p; | |
2684 | int al,ok,ret=0; | |
2685 | long n; | |
2686 | int type=0,i,j; | |
2687 | X509 *peer; | |
2688 | ||
36d16f8e | 2689 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
2690 | SSL3_ST_SR_CERT_VRFY_A, |
2691 | SSL3_ST_SR_CERT_VRFY_B, | |
2692 | -1, | |
00a357ab | 2693 | 514, /* 514? */ |
d02b48c6 RE |
2694 | &ok); |
2695 | ||
2696 | if (!ok) return((int)n); | |
2697 | ||
2698 | if (s->session->peer != NULL) | |
2699 | { | |
2700 | peer=s->session->peer; | |
2701 | pkey=X509_get_pubkey(peer); | |
2702 | type=X509_certificate_type(peer,pkey); | |
2703 | } | |
2704 | else | |
2705 | { | |
2706 | peer=NULL; | |
2707 | pkey=NULL; | |
2708 | } | |
2709 | ||
2710 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY) | |
2711 | { | |
2712 | s->s3->tmp.reuse_message=1; | |
2713 | if ((peer != NULL) && (type | EVP_PKT_SIGN)) | |
2714 | { | |
58964a49 | 2715 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 | 2716 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE); |
d02b48c6 RE |
2717 | goto f_err; |
2718 | } | |
2719 | ret=1; | |
2720 | goto end; | |
2721 | } | |
2722 | ||
2723 | if (peer == NULL) | |
2724 | { | |
2725 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED); | |
58964a49 | 2726 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
2727 | goto f_err; |
2728 | } | |
2729 | ||
2730 | if (!(type & EVP_PKT_SIGN)) | |
2731 | { | |
2732 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE); | |
58964a49 | 2733 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
2734 | goto f_err; |
2735 | } | |
2736 | ||
2737 | if (s->s3->change_cipher_spec) | |
2738 | { | |
2739 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY); | |
58964a49 | 2740 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
2741 | goto f_err; |
2742 | } | |
2743 | ||
2744 | /* we now have a signature that we need to verify */ | |
48948d53 | 2745 | p=(unsigned char *)s->init_msg; |
0e1dba93 DSH |
2746 | /* Check for broken implementations of GOST ciphersuites */ |
2747 | /* If key is GOST and n is exactly 64, it is bare | |
2748 | * signature without length field */ | |
2749 | if (n==64 && (pkey->type==NID_id_GostR3410_94 || | |
2750 | pkey->type == NID_id_GostR3410_2001) ) | |
d02b48c6 | 2751 | { |
0e1dba93 DSH |
2752 | i=64; |
2753 | } | |
2754 | else | |
2755 | { | |
2756 | n2s(p,i); | |
2757 | n-=2; | |
2758 | if (i > n) | |
2759 | { | |
2760 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH); | |
2761 | al=SSL_AD_DECODE_ERROR; | |
2762 | goto f_err; | |
2763 | } | |
2764 | } | |
d02b48c6 RE |
2765 | j=EVP_PKEY_size(pkey); |
2766 | if ((i > j) || (n > j) || (n <= 0)) | |
2767 | { | |
2768 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE); | |
58964a49 | 2769 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
2770 | goto f_err; |
2771 | } | |
2772 | ||
bc36ee62 | 2773 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
2774 | if (pkey->type == EVP_PKEY_RSA) |
2775 | { | |
f2d9a32c | 2776 | i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md, |
1c80019a DSH |
2777 | MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i, |
2778 | pkey->pkey.rsa); | |
d02b48c6 RE |
2779 | if (i < 0) |
2780 | { | |
58964a49 | 2781 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
2782 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT); |
2783 | goto f_err; | |
2784 | } | |
1c80019a | 2785 | if (i == 0) |
d02b48c6 | 2786 | { |
58964a49 | 2787 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
2788 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE); |
2789 | goto f_err; | |
2790 | } | |
2791 | } | |
2792 | else | |
2793 | #endif | |
bc36ee62 | 2794 | #ifndef OPENSSL_NO_DSA |
d02b48c6 RE |
2795 | if (pkey->type == EVP_PKEY_DSA) |
2796 | { | |
58964a49 | 2797 | j=DSA_verify(pkey->save_type, |
f2d9a32c | 2798 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]), |
d02b48c6 RE |
2799 | SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa); |
2800 | if (j <= 0) | |
2801 | { | |
2802 | /* bad signature */ | |
58964a49 | 2803 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
2804 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE); |
2805 | goto f_err; | |
2806 | } | |
2807 | } | |
2808 | else | |
ea262260 BM |
2809 | #endif |
2810 | #ifndef OPENSSL_NO_ECDSA | |
5488bb61 | 2811 | if (pkey->type == EVP_PKEY_EC) |
ea262260 BM |
2812 | { |
2813 | j=ECDSA_verify(pkey->save_type, | |
2814 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]), | |
9dd84053 | 2815 | SHA_DIGEST_LENGTH,p,i,pkey->pkey.ec); |
ea262260 BM |
2816 | if (j <= 0) |
2817 | { | |
2818 | /* bad signature */ | |
2819 | al=SSL_AD_DECRYPT_ERROR; | |
2820 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, | |
2821 | SSL_R_BAD_ECDSA_SIGNATURE); | |
2822 | goto f_err; | |
2823 | } | |
2824 | } | |
2825 | else | |
d02b48c6 | 2826 | #endif |
0e1dba93 DSH |
2827 | if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) |
2828 | { unsigned char signature[64]; | |
2829 | int idx; | |
2830 | EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new(pkey,NULL); | |
2831 | EVP_PKEY_verify_init(pctx); | |
2832 | if (i!=64) { | |
2833 | fprintf(stderr,"GOST signature length is %d",i); | |
2834 | } | |
2835 | for (idx=0;idx<64;idx++) { | |
2836 | signature[63-idx]=p[idx]; | |
2837 | } | |
2838 | j=EVP_PKEY_verify(pctx,signature,64,s->s3->tmp.cert_verify_md,32); | |
2839 | EVP_PKEY_CTX_free(pctx); | |
2840 | if (j<=0) | |
2841 | { | |
2842 | al=SSL_AD_DECRYPT_ERROR; | |
2843 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, | |
2844 | SSL_R_BAD_ECDSA_SIGNATURE); | |
2845 | goto f_err; | |
2846 | } | |
2847 | } | |
2848 | else | |
d02b48c6 | 2849 | { |
5277d7cb | 2850 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR); |
58964a49 | 2851 | al=SSL_AD_UNSUPPORTED_CERTIFICATE; |
d02b48c6 RE |
2852 | goto f_err; |
2853 | } | |
2854 | ||
2855 | ||
2856 | ret=1; | |
2857 | if (0) | |
2858 | { | |
2859 | f_err: | |
2860 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
2861 | } | |
2862 | end: | |
a8236c8c | 2863 | EVP_PKEY_free(pkey); |
d02b48c6 RE |
2864 | return(ret); |
2865 | } | |
2866 | ||
36d16f8e | 2867 | int ssl3_get_client_certificate(SSL *s) |
d02b48c6 RE |
2868 | { |
2869 | int i,ok,al,ret= -1; | |
2870 | X509 *x=NULL; | |
2871 | unsigned long l,nc,llen,n; | |
875a644a RL |
2872 | const unsigned char *p,*q; |
2873 | unsigned char *d; | |
f73e07cf | 2874 | STACK_OF(X509) *sk=NULL; |
d02b48c6 | 2875 | |
36d16f8e | 2876 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
2877 | SSL3_ST_SR_CERT_A, |
2878 | SSL3_ST_SR_CERT_B, | |
2879 | -1, | |
c0f5dd07 | 2880 | s->max_cert_list, |
d02b48c6 RE |
2881 | &ok); |
2882 | ||
2883 | if (!ok) return((int)n); | |
2884 | ||
2885 | if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE) | |
2886 | { | |
2887 | if ( (s->verify_mode & SSL_VERIFY_PEER) && | |
2888 | (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) | |
2889 | { | |
2890 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
58964a49 RE |
2891 | al=SSL_AD_HANDSHAKE_FAILURE; |
2892 | goto f_err; | |
2893 | } | |
47134b78 | 2894 | /* If tls asked for a client cert, the client must return a 0 list */ |
58964a49 RE |
2895 | if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request) |
2896 | { | |
2897 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST); | |
2898 | al=SSL_AD_UNEXPECTED_MESSAGE; | |
d02b48c6 RE |
2899 | goto f_err; |
2900 | } | |
2901 | s->s3->tmp.reuse_message=1; | |
2902 | return(1); | |
2903 | } | |
2904 | ||
2905 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) | |
2906 | { | |
58964a49 | 2907 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
2908 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE); |
2909 | goto f_err; | |
2910 | } | |
875a644a | 2911 | p=d=(unsigned char *)s->init_msg; |
d02b48c6 | 2912 | |
f73e07cf | 2913 | if ((sk=sk_X509_new_null()) == NULL) |
d02b48c6 RE |
2914 | { |
2915 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
2916 | goto err; | |
2917 | } | |
2918 | ||
2919 | n2l3(p,llen); | |
2920 | if (llen+3 != n) | |
2921 | { | |
58964a49 | 2922 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
2923 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH); |
2924 | goto f_err; | |
2925 | } | |
2926 | for (nc=0; nc<llen; ) | |
2927 | { | |
2928 | n2l3(p,l); | |
2929 | if ((l+nc+3) > llen) | |
2930 | { | |
58964a49 | 2931 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
2932 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); |
2933 | goto f_err; | |
2934 | } | |
2935 | ||
2936 | q=p; | |
2937 | x=d2i_X509(NULL,&p,l); | |
2938 | if (x == NULL) | |
2939 | { | |
2940 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB); | |
2941 | goto err; | |
2942 | } | |
2943 | if (p != (q+l)) | |
2944 | { | |
58964a49 | 2945 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
2946 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); |
2947 | goto f_err; | |
2948 | } | |
f73e07cf | 2949 | if (!sk_X509_push(sk,x)) |
d02b48c6 RE |
2950 | { |
2951 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
2952 | goto err; | |
2953 | } | |
2954 | x=NULL; | |
2955 | nc+=l+3; | |
2956 | } | |
2957 | ||
f73e07cf | 2958 | if (sk_X509_num(sk) <= 0) |
d02b48c6 | 2959 | { |
58964a49 RE |
2960 | /* TLS does not mind 0 certs returned */ |
2961 | if (s->version == SSL3_VERSION) | |
2962 | { | |
2963 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2964 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED); | |
2965 | goto f_err; | |
2966 | } | |
2967 | /* Fail for TLS only if we required a certificate */ | |
2968 | else if ((s->verify_mode & SSL_VERIFY_PEER) && | |
2969 | (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) | |
2970 | { | |
2971 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
2972 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2973 | goto f_err; | |
2974 | } | |
d02b48c6 | 2975 | } |
58964a49 | 2976 | else |
d02b48c6 | 2977 | { |
58964a49 | 2978 | i=ssl_verify_cert_chain(s,sk); |
bab53405 | 2979 | if (i <= 0) |
58964a49 RE |
2980 | { |
2981 | al=ssl_verify_alarm_type(s->verify_result); | |
2982 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED); | |
2983 | goto f_err; | |
2984 | } | |
d02b48c6 RE |
2985 | } |
2986 | ||
b56bce4f | 2987 | if (s->session->peer != NULL) /* This should not be needed */ |
d02b48c6 | 2988 | X509_free(s->session->peer); |
f73e07cf | 2989 | s->session->peer=sk_X509_shift(sk); |
b1fe6ca1 | 2990 | s->session->verify_result = s->verify_result; |
8051996a | 2991 | |
b56bce4f BM |
2992 | /* With the current implementation, sess_cert will always be NULL |
2993 | * when we arrive here. */ | |
2994 | if (s->session->sess_cert == NULL) | |
2995 | { | |
2996 | s->session->sess_cert = ssl_sess_cert_new(); | |
2997 | if (s->session->sess_cert == NULL) | |
2998 | { | |
2999 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE); | |
3000 | goto err; | |
3001 | } | |
3002 | } | |
3003 | if (s->session->sess_cert->cert_chain != NULL) | |
3004 | sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free); | |
9d5cceac | 3005 | s->session->sess_cert->cert_chain=sk; |
98e04f9e BM |
3006 | /* Inconsistency alert: cert_chain does *not* include the |
3007 | * peer's own certificate, while we do include it in s3_clnt.c */ | |
8051996a | 3008 | |
b4cadc6e | 3009 | sk=NULL; |
d02b48c6 RE |
3010 | |
3011 | ret=1; | |
3012 | if (0) | |
3013 | { | |
3014 | f_err: | |
3015 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
3016 | } | |
3017 | err: | |
3018 | if (x != NULL) X509_free(x); | |
f73e07cf | 3019 | if (sk != NULL) sk_X509_pop_free(sk,X509_free); |
d02b48c6 RE |
3020 | return(ret); |
3021 | } | |
3022 | ||
6b691a5c | 3023 | int ssl3_send_server_certificate(SSL *s) |
d02b48c6 RE |
3024 | { |
3025 | unsigned long l; | |
3026 | X509 *x; | |
3027 | ||
3028 | if (s->state == SSL3_ST_SW_CERT_A) | |
3029 | { | |
3030 | x=ssl_get_server_send_cert(s); | |
52b8dad8 BM |
3031 | if (x == NULL) |
3032 | { | |
3033 | /* VRS: allow null cert if auth == KRB5 */ | |
3034 | if ((s->s3->tmp.new_cipher->algorithm_auth != SSL_aKRB5) || | |
3035 | (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5)) | |
3036 | { | |
3037 | SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR); | |
3038 | return(0); | |
3039 | } | |
d02b48c6 RE |
3040 | } |
3041 | ||
3042 | l=ssl3_output_cert_chain(s,x); | |
3043 | s->state=SSL3_ST_SW_CERT_B; | |
3044 | s->init_num=(int)l; | |
3045 | s->init_off=0; | |
3046 | } | |
3047 | ||
3048 | /* SSL3_ST_SW_CERT_B */ | |
3049 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
3050 | } | |
ddd3a617 | 3051 | #ifndef OPENSSL_NO_TLSEXT |
6434abbf DSH |
3052 | int ssl3_send_newsession_ticket(SSL *s) |
3053 | { | |
3054 | if (s->state == SSL3_ST_SW_SESSION_TICKET_A) | |
3055 | { | |
3056 | unsigned char *p, *senc, *macstart; | |
3057 | int len, slen; | |
3058 | unsigned int hlen; | |
3059 | EVP_CIPHER_CTX ctx; | |
3060 | HMAC_CTX hctx; | |
3d0b604c | 3061 | SSL_CTX *tctx = s->initial_ctx; |
8a2062fe DSH |
3062 | unsigned char iv[EVP_MAX_IV_LENGTH]; |
3063 | unsigned char key_name[16]; | |
6434abbf DSH |
3064 | |
3065 | /* get session encoding length */ | |
3066 | slen = i2d_SSL_SESSION(s->session, NULL); | |
3067 | /* Some length values are 16 bits, so forget it if session is | |
3068 | * too long | |
3069 | */ | |
3070 | if (slen > 0xFF00) | |
3071 | return -1; | |
3072 | /* Grow buffer if need be: the length calculation is as | |
3073 | * follows 1 (size of message name) + 3 (message length | |
3074 | * bytes) + 4 (ticket lifetime hint) + 2 (ticket length) + | |
3075 | * 16 (key name) + max_iv_len (iv length) + | |
3076 | * session_length + max_enc_block_size (max encrypted session | |
3077 | * length) + max_md_size (HMAC). | |
3078 | */ | |
3079 | if (!BUF_MEM_grow(s->init_buf, | |
3080 | 26 + EVP_MAX_IV_LENGTH + EVP_MAX_BLOCK_LENGTH + | |
3081 | EVP_MAX_MD_SIZE + slen)) | |
3082 | return -1; | |
3083 | senc = OPENSSL_malloc(slen); | |
3084 | if (!senc) | |
3085 | return -1; | |
3086 | p = senc; | |
3087 | i2d_SSL_SESSION(s->session, &p); | |
3088 | ||
3089 | p=(unsigned char *)s->init_buf->data; | |
3090 | /* do the header */ | |
3091 | *(p++)=SSL3_MT_NEWSESSION_TICKET; | |
3092 | /* Skip message length for now */ | |
3093 | p += 3; | |
8a2062fe DSH |
3094 | EVP_CIPHER_CTX_init(&ctx); |
3095 | HMAC_CTX_init(&hctx); | |
3096 | /* Initialize HMAC and cipher contexts. If callback present | |
3097 | * it does all the work otherwise use generated values | |
3098 | * from parent ctx. | |
3099 | */ | |
3d0b604c | 3100 | if (tctx->tlsext_ticket_key_cb) |
8a2062fe | 3101 | { |
3d0b604c | 3102 | if (tctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx, |
8a2062fe DSH |
3103 | &hctx, 1) < 0) |
3104 | { | |
3105 | OPENSSL_free(senc); | |
3106 | return -1; | |
3107 | } | |
3108 | } | |
3109 | else | |
3110 | { | |
3111 | RAND_pseudo_bytes(iv, 16); | |
3112 | EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL, | |
3d0b604c DSH |
3113 | tctx->tlsext_tick_aes_key, iv); |
3114 | HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16, | |
8a2062fe | 3115 | tlsext_tick_md(), NULL); |
3d0b604c | 3116 | memcpy(key_name, tctx->tlsext_tick_key_name, 16); |
8a2062fe | 3117 | } |
6434abbf DSH |
3118 | l2n(s->session->tlsext_tick_lifetime_hint, p); |
3119 | /* Skip ticket length for now */ | |
3120 | p += 2; | |
3121 | /* Output key name */ | |
3122 | macstart = p; | |
8a2062fe | 3123 | memcpy(p, key_name, 16); |
6434abbf | 3124 | p += 16; |
8a2062fe DSH |
3125 | /* output IV */ |
3126 | memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx)); | |
3127 | p += EVP_CIPHER_CTX_iv_length(&ctx); | |
6434abbf | 3128 | /* Encrypt session data */ |
6434abbf DSH |
3129 | EVP_EncryptUpdate(&ctx, p, &len, senc, slen); |
3130 | p += len; | |
3131 | EVP_EncryptFinal(&ctx, p, &len); | |
3132 | p += len; | |
3133 | EVP_CIPHER_CTX_cleanup(&ctx); | |
3134 | ||
6434abbf DSH |
3135 | HMAC_Update(&hctx, macstart, p - macstart); |
3136 | HMAC_Final(&hctx, p, &hlen); | |
3137 | HMAC_CTX_cleanup(&hctx); | |
3138 | ||
3139 | p += hlen; | |
3140 | /* Now write out lengths: p points to end of data written */ | |
3141 | /* Total length */ | |
3142 | len = p - (unsigned char *)s->init_buf->data; | |
3143 | p=(unsigned char *)s->init_buf->data + 1; | |
3144 | l2n3(len - 4, p); /* Message length */ | |
3145 | p += 4; | |
3146 | s2n(len - 10, p); /* Ticket length */ | |
3147 | ||
3148 | /* number of bytes to write */ | |
3149 | s->init_num= len; | |
3150 | s->state=SSL3_ST_SW_SESSION_TICKET_B; | |
3151 | s->init_off=0; | |
3152 | OPENSSL_free(senc); | |
3153 | } | |
3154 | ||
3155 | /* SSL3_ST_SW_SESSION_TICKET_B */ | |
3156 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
3157 | } | |
67c8e7f4 DSH |
3158 | |
3159 | int ssl3_send_cert_status(SSL *s) | |
3160 | { | |
3161 | if (s->state == SSL3_ST_SW_CERT_STATUS_A) | |
3162 | { | |
3163 | unsigned char *p; | |
3164 | /* Grow buffer if need be: the length calculation is as | |
3165 | * follows 1 (message type) + 3 (message length) + | |
3166 | * 1 (ocsp response type) + 3 (ocsp response length) | |
3167 | * + (ocsp response) | |
3168 | */ | |
3169 | if (!BUF_MEM_grow(s->init_buf, 8 + s->tlsext_ocsp_resplen)) | |
3170 | return -1; | |
3171 | ||
3172 | p=(unsigned char *)s->init_buf->data; | |
3173 | ||
3174 | /* do the header */ | |
3175 | *(p++)=SSL3_MT_CERTIFICATE_STATUS; | |
3176 | /* message length */ | |
3177 | l2n3(s->tlsext_ocsp_resplen + 4, p); | |
3178 | /* status type */ | |
3179 | *(p++)= s->tlsext_status_type; | |
3180 | /* length of OCSP response */ | |
3181 | l2n3(s->tlsext_ocsp_resplen, p); | |
3182 | /* actual response */ | |
3183 | memcpy(p, s->tlsext_ocsp_resp, s->tlsext_ocsp_resplen); | |
3184 | /* number of bytes to write */ | |
3185 | s->init_num = 8 + s->tlsext_ocsp_resplen; | |
3186 | s->state=SSL3_ST_SW_CERT_STATUS_B; | |
3187 | s->init_off = 0; | |
3188 | } | |
3189 | ||
3190 | /* SSL3_ST_SW_CERT_STATUS_B */ | |
3191 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
3192 | } | |
6434abbf | 3193 | #endif |