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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 RE |
192 | long num1; |
193 | int ret= -1; | |
d02b48c6 RE |
194 | int new_state,state,skip=0; |
195 | ||
eb952088 | 196 | RAND_add(&Time,sizeof(Time),0); |
d02b48c6 | 197 | ERR_clear_error(); |
58964a49 | 198 | clear_sys_error(); |
d02b48c6 RE |
199 | |
200 | if (s->info_callback != NULL) | |
201 | cb=s->info_callback; | |
202 | else if (s->ctx->info_callback != NULL) | |
203 | cb=s->ctx->info_callback; | |
204 | ||
205 | /* init things to blank */ | |
d02b48c6 | 206 | s->in_handshake++; |
979689aa | 207 | if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); |
d02b48c6 | 208 | |
b56bce4f | 209 | if (s->cert == NULL) |
d02b48c6 RE |
210 | { |
211 | SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_NO_CERTIFICATE_SET); | |
b56bce4f | 212 | return(-1); |
d02b48c6 | 213 | } |
d02b48c6 RE |
214 | |
215 | for (;;) | |
216 | { | |
217 | state=s->state; | |
218 | ||
219 | switch (s->state) | |
220 | { | |
221 | case SSL_ST_RENEGOTIATE: | |
222 | s->new_session=1; | |
223 | /* s->state=SSL_ST_ACCEPT; */ | |
224 | ||
225 | case SSL_ST_BEFORE: | |
226 | case SSL_ST_ACCEPT: | |
227 | case SSL_ST_BEFORE|SSL_ST_ACCEPT: | |
228 | case SSL_ST_OK|SSL_ST_ACCEPT: | |
229 | ||
413c4f45 | 230 | s->server=1; |
d02b48c6 RE |
231 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); |
232 | ||
58964a49 | 233 | if ((s->version>>8) != 3) |
bbb8de09 | 234 | { |
5277d7cb | 235 | SSLerr(SSL_F_SSL3_ACCEPT, ERR_R_INTERNAL_ERROR); |
bbb8de09 BM |
236 | return -1; |
237 | } | |
d02b48c6 RE |
238 | s->type=SSL_ST_ACCEPT; |
239 | ||
240 | if (s->init_buf == NULL) | |
241 | { | |
242 | if ((buf=BUF_MEM_new()) == NULL) | |
243 | { | |
244 | ret= -1; | |
245 | goto end; | |
246 | } | |
247 | if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) | |
248 | { | |
249 | ret= -1; | |
250 | goto end; | |
251 | } | |
252 | s->init_buf=buf; | |
253 | } | |
254 | ||
255 | if (!ssl3_setup_buffers(s)) | |
256 | { | |
257 | ret= -1; | |
258 | goto end; | |
259 | } | |
260 | ||
d02b48c6 RE |
261 | s->init_num=0; |
262 | ||
263 | if (s->state != SSL_ST_RENEGOTIATE) | |
264 | { | |
8e2f6b79 BM |
265 | /* Ok, we now need to push on a buffering BIO so that |
266 | * the output is sent in a way that TCP likes :-) | |
267 | */ | |
268 | if (!ssl_init_wbio_buffer(s,1)) { ret= -1; goto end; } | |
269 | ||
745c70e5 | 270 | ssl3_init_finished_mac(s); |
d02b48c6 | 271 | s->state=SSL3_ST_SR_CLNT_HELLO_A; |
413c4f45 | 272 | s->ctx->stats.sess_accept++; |
d02b48c6 RE |
273 | } |
274 | else | |
275 | { | |
8e2f6b79 BM |
276 | /* s->state == SSL_ST_RENEGOTIATE, |
277 | * we will just send a HelloRequest */ | |
413c4f45 | 278 | s->ctx->stats.sess_accept_renegotiate++; |
d02b48c6 RE |
279 | s->state=SSL3_ST_SW_HELLO_REQ_A; |
280 | } | |
281 | break; | |
282 | ||
283 | case SSL3_ST_SW_HELLO_REQ_A: | |
284 | case SSL3_ST_SW_HELLO_REQ_B: | |
285 | ||
286 | s->shutdown=0; | |
287 | ret=ssl3_send_hello_request(s); | |
288 | if (ret <= 0) goto end; | |
289 | s->s3->tmp.next_state=SSL3_ST_SW_HELLO_REQ_C; | |
290 | s->state=SSL3_ST_SW_FLUSH; | |
291 | s->init_num=0; | |
292 | ||
293 | ssl3_init_finished_mac(s); | |
294 | break; | |
295 | ||
296 | case SSL3_ST_SW_HELLO_REQ_C: | |
d02b48c6 | 297 | s->state=SSL_ST_OK; |
2260ad21 | 298 | break; |
d02b48c6 RE |
299 | |
300 | case SSL3_ST_SR_CLNT_HELLO_A: | |
301 | case SSL3_ST_SR_CLNT_HELLO_B: | |
302 | case SSL3_ST_SR_CLNT_HELLO_C: | |
303 | ||
304 | s->shutdown=0; | |
305 | ret=ssl3_get_client_hello(s); | |
306 | if (ret <= 0) goto end; | |
58ece833 | 307 | |
8c74b5e5 | 308 | s->new_session = 2; |
d02b48c6 RE |
309 | s->state=SSL3_ST_SW_SRVR_HELLO_A; |
310 | s->init_num=0; | |
311 | break; | |
312 | ||
313 | case SSL3_ST_SW_SRVR_HELLO_A: | |
314 | case SSL3_ST_SW_SRVR_HELLO_B: | |
315 | ret=ssl3_send_server_hello(s); | |
316 | if (ret <= 0) goto end; | |
d26c905c | 317 | #ifndef OPENSSL_NO_TLSEXT |
d02b48c6 | 318 | if (s->hit) |
d26c905c DSH |
319 | { |
320 | if (s->tlsext_ticket_expected) | |
321 | s->state=SSL3_ST_SW_SESSION_TICKET_A; | |
322 | else | |
323 | s->state=SSL3_ST_SW_CHANGE_A; | |
324 | } | |
325 | #else | |
326 | if (s->hit) | |
327 | s->state=SSL3_ST_SW_CHANGE_A; | |
328 | #endif | |
d02b48c6 RE |
329 | else |
330 | s->state=SSL3_ST_SW_CERT_A; | |
331 | s->init_num=0; | |
332 | break; | |
333 | ||
334 | case SSL3_ST_SW_CERT_A: | |
335 | case SSL3_ST_SW_CERT_B: | |
cbb92dfa RL |
336 | /* Check if it is anon DH or anon ECDH, */ |
337 | /* normal PSK or KRB5 */ | |
52b8dad8 BM |
338 | if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) |
339 | && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK) | |
340 | && !(s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) | |
d02b48c6 RE |
341 | { |
342 | ret=ssl3_send_server_certificate(s); | |
343 | if (ret <= 0) goto end; | |
67c8e7f4 DSH |
344 | #ifndef OPENSSL_NO_TLSEXT |
345 | if (s->tlsext_status_expected) | |
346 | s->state=SSL3_ST_SW_CERT_STATUS_A; | |
347 | else | |
348 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
d02b48c6 | 349 | } |
67c8e7f4 DSH |
350 | else |
351 | { | |
352 | skip = 1; | |
353 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
354 | } | |
355 | #else | |
3ce54f35 | 356 | } |
d02b48c6 RE |
357 | else |
358 | skip=1; | |
67c8e7f4 | 359 | |
d02b48c6 | 360 | s->state=SSL3_ST_SW_KEY_EXCH_A; |
67c8e7f4 | 361 | #endif |
d02b48c6 RE |
362 | s->init_num=0; |
363 | break; | |
364 | ||
365 | case SSL3_ST_SW_KEY_EXCH_A: | |
366 | case SSL3_ST_SW_KEY_EXCH_B: | |
52b8dad8 | 367 | alg_k = s->s3->tmp.new_cipher->algorithm_mkey; |
d02b48c6 RE |
368 | |
369 | /* clear this, it may get reset by | |
370 | * send_server_key_exchange */ | |
f9b3bff6 | 371 | if ((s->options & SSL_OP_EPHEMERAL_RSA) |
bc36ee62 | 372 | #ifndef OPENSSL_NO_KRB5 |
52b8dad8 | 373 | && !(alg_k & SSL_kKRB5) |
bc36ee62 | 374 | #endif /* OPENSSL_NO_KRB5 */ |
f9b3bff6 | 375 | ) |
7bc03ded BM |
376 | /* option SSL_OP_EPHEMERAL_RSA sends temporary RSA key |
377 | * even when forbidden by protocol specs | |
378 | * (handshake may fail as clients are not required to | |
379 | * be able to handle this) */ | |
d02b48c6 RE |
380 | s->s3->tmp.use_rsa_tmp=1; |
381 | else | |
382 | s->s3->tmp.use_rsa_tmp=0; | |
383 | ||
ea262260 | 384 | |
d02b48c6 | 385 | /* only send if a DH key exchange, fortezza or |
ea262260 BM |
386 | * RSA but we have a sign only certificate |
387 | * | |
ddac1974 NL |
388 | * PSK: may send PSK identity hints |
389 | * | |
ea262260 BM |
390 | * For ECC ciphersuites, we send a serverKeyExchange |
391 | * message only if the cipher suite is either | |
392 | * ECDH-anon or ECDHE. In other cases, the | |
89bbe14c | 393 | * server certificate contains the server's |
ea262260 BM |
394 | * public key for key exchange. |
395 | */ | |
06ab81f9 | 396 | if (s->s3->tmp.use_rsa_tmp |
ddac1974 NL |
397 | /* PSK: send ServerKeyExchange if PSK identity |
398 | * hint if provided */ | |
399 | #ifndef OPENSSL_NO_PSK | |
52b8dad8 | 400 | || ((alg_k & SSL_kPSK) && s->ctx->psk_identity_hint) |
ddac1974 | 401 | #endif |
52b8dad8 BM |
402 | || (alg_k & (SSL_kDHr|SSL_kDHd|SSL_kEDH)) |
403 | || (alg_k & SSL_kEECDH) | |
404 | || ((alg_k & SSL_kRSA) | |
b56bce4f | 405 | && (s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey == NULL |
018e57c7 DSH |
406 | || (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) |
407 | && EVP_PKEY_size(s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher) | |
06ab81f9 BL |
408 | ) |
409 | ) | |
410 | ) | |
d02b48c6 | 411 | ) |
d02b48c6 RE |
412 | { |
413 | ret=ssl3_send_server_key_exchange(s); | |
414 | if (ret <= 0) goto end; | |
415 | } | |
416 | else | |
417 | skip=1; | |
418 | ||
419 | s->state=SSL3_ST_SW_CERT_REQ_A; | |
420 | s->init_num=0; | |
421 | break; | |
422 | ||
423 | case SSL3_ST_SW_CERT_REQ_A: | |
424 | case SSL3_ST_SW_CERT_REQ_B: | |
47134b78 BM |
425 | if (/* don't request cert unless asked for it: */ |
426 | !(s->verify_mode & SSL_VERIFY_PEER) || | |
427 | /* if SSL_VERIFY_CLIENT_ONCE is set, | |
428 | * don't request cert during re-negotiation: */ | |
d02b48c6 | 429 | ((s->session->peer != NULL) && |
47134b78 BM |
430 | (s->verify_mode & SSL_VERIFY_CLIENT_ONCE)) || |
431 | /* never request cert in anonymous ciphersuites | |
432 | * (see section "Certificate request" in SSL 3 drafts | |
433 | * and in RFC 2246): */ | |
52b8dad8 | 434 | ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && |
47134b78 BM |
435 | /* ... except when the application insists on verification |
436 | * (against the specs, but s3_clnt.c accepts this for SSL 3) */ | |
45442167 | 437 | !(s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) || |
52b8dad8 BM |
438 | /* never request cert in Kerberos ciphersuites */ |
439 | (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) | |
ddac1974 NL |
440 | /* With normal PSK Certificates and |
441 | * Certificate Requests are omitted */ | |
52b8dad8 | 442 | || (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) |
d02b48c6 RE |
443 | { |
444 | /* no cert request */ | |
445 | skip=1; | |
58964a49 | 446 | s->s3->tmp.cert_request=0; |
d02b48c6 RE |
447 | s->state=SSL3_ST_SW_SRVR_DONE_A; |
448 | } | |
449 | else | |
450 | { | |
58964a49 | 451 | s->s3->tmp.cert_request=1; |
d02b48c6 RE |
452 | ret=ssl3_send_certificate_request(s); |
453 | if (ret <= 0) goto end; | |
de469ef2 | 454 | #ifndef NETSCAPE_HANG_BUG |
d02b48c6 | 455 | s->state=SSL3_ST_SW_SRVR_DONE_A; |
de469ef2 DSH |
456 | #else |
457 | s->state=SSL3_ST_SW_FLUSH; | |
458 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
459 | #endif | |
d02b48c6 RE |
460 | s->init_num=0; |
461 | } | |
462 | break; | |
463 | ||
464 | case SSL3_ST_SW_SRVR_DONE_A: | |
465 | case SSL3_ST_SW_SRVR_DONE_B: | |
466 | ret=ssl3_send_server_done(s); | |
467 | if (ret <= 0) goto end; | |
468 | s->s3->tmp.next_state=SSL3_ST_SR_CERT_A; | |
469 | s->state=SSL3_ST_SW_FLUSH; | |
470 | s->init_num=0; | |
471 | break; | |
472 | ||
473 | case SSL3_ST_SW_FLUSH: | |
474 | /* number of bytes to be flushed */ | |
475 | num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL); | |
476 | if (num1 > 0) | |
477 | { | |
478 | s->rwstate=SSL_WRITING; | |
479 | num1=BIO_flush(s->wbio); | |
480 | if (num1 <= 0) { ret= -1; goto end; } | |
481 | s->rwstate=SSL_NOTHING; | |
482 | } | |
483 | ||
484 | s->state=s->s3->tmp.next_state; | |
485 | break; | |
486 | ||
487 | case SSL3_ST_SR_CERT_A: | |
488 | case SSL3_ST_SR_CERT_B: | |
745c70e5 | 489 | /* Check for second client hello (MS SGC) */ |
3d14b9d0 | 490 | ret = ssl3_check_client_hello(s); |
745c70e5 BM |
491 | if (ret <= 0) |
492 | goto end; | |
493 | if (ret == 2) | |
494 | s->state = SSL3_ST_SR_CLNT_HELLO_C; | |
3d14b9d0 | 495 | else { |
14f3d7c5 DSH |
496 | if (s->s3->tmp.cert_request) |
497 | { | |
498 | ret=ssl3_get_client_certificate(s); | |
499 | if (ret <= 0) goto end; | |
500 | } | |
3d14b9d0 DSH |
501 | s->init_num=0; |
502 | s->state=SSL3_ST_SR_KEY_EXCH_A; | |
503 | } | |
d02b48c6 RE |
504 | break; |
505 | ||
506 | case SSL3_ST_SR_KEY_EXCH_A: | |
507 | case SSL3_ST_SR_KEY_EXCH_B: | |
508 | ret=ssl3_get_client_key_exchange(s); | |
89bbe14c | 509 | if (ret <= 0) |
ea262260 BM |
510 | goto end; |
511 | if (ret == 2) | |
512 | { | |
513 | /* For the ECDH ciphersuites when | |
514 | * the client sends its ECDH pub key in | |
515 | * a certificate, the CertificateVerify | |
516 | * message is not sent. | |
517 | */ | |
518 | s->state=SSL3_ST_SR_FINISHED_A; | |
519 | s->init_num = 0; | |
520 | } | |
89bbe14c | 521 | else |
ea262260 | 522 | { |
0e1dba93 DSH |
523 | int offset=0; |
524 | int dgst_num; | |
ea262260 BM |
525 | s->state=SSL3_ST_SR_CERT_VRFY_A; |
526 | s->init_num=0; | |
d02b48c6 | 527 | |
ea262260 BM |
528 | /* We need to get hashes here so if there is |
529 | * a client cert, it can be verified | |
81025661 DSH |
530 | * FIXME - digest processing for CertificateVerify |
531 | * should be generalized. But it is next step | |
89bbe14c | 532 | */ |
0e1dba93 DSH |
533 | if (s->s3->handshake_buffer) |
534 | ssl3_digest_cached_records(s); | |
535 | for (dgst_num=0; dgst_num<SSL_MAX_DIGEST;dgst_num++) | |
536 | if (s->s3->handshake_dgst[dgst_num]) | |
537 | { | |
538 | 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])); | |
539 | offset+=EVP_MD_CTX_size(s->s3->handshake_dgst[dgst_num]); | |
540 | } | |
ea262260 | 541 | } |
d02b48c6 RE |
542 | break; |
543 | ||
544 | case SSL3_ST_SR_CERT_VRFY_A: | |
545 | case SSL3_ST_SR_CERT_VRFY_B: | |
546 | ||
547 | /* we should decide if we expected this one */ | |
548 | ret=ssl3_get_cert_verify(s); | |
549 | if (ret <= 0) goto end; | |
550 | ||
551 | s->state=SSL3_ST_SR_FINISHED_A; | |
552 | s->init_num=0; | |
553 | break; | |
554 | ||
555 | case SSL3_ST_SR_FINISHED_A: | |
556 | case SSL3_ST_SR_FINISHED_B: | |
557 | ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A, | |
58964a49 | 558 | SSL3_ST_SR_FINISHED_B); |
d02b48c6 | 559 | if (ret <= 0) goto end; |
6434abbf | 560 | #ifndef OPENSSL_NO_TLSEXT |
d26c905c | 561 | if (s->tlsext_ticket_expected) |
6434abbf | 562 | s->state=SSL3_ST_SW_SESSION_TICKET_A; |
d26c905c DSH |
563 | else if (s->hit) |
564 | s->state=SSL_ST_OK; | |
565 | #else | |
566 | if (s->hit) | |
567 | s->state=SSL_ST_OK; | |
6434abbf | 568 | #endif |
d02b48c6 RE |
569 | else |
570 | s->state=SSL3_ST_SW_CHANGE_A; | |
571 | s->init_num=0; | |
572 | break; | |
573 | ||
6434abbf DSH |
574 | #ifndef OPENSSL_NO_TLSEXT |
575 | case SSL3_ST_SW_SESSION_TICKET_A: | |
576 | case SSL3_ST_SW_SESSION_TICKET_B: | |
577 | ret=ssl3_send_newsession_ticket(s); | |
578 | if (ret <= 0) goto end; | |
579 | s->state=SSL3_ST_SW_CHANGE_A; | |
580 | s->init_num=0; | |
581 | break; | |
582 | ||
67c8e7f4 DSH |
583 | case SSL3_ST_SW_CERT_STATUS_A: |
584 | case SSL3_ST_SW_CERT_STATUS_B: | |
585 | ret=ssl3_send_cert_status(s); | |
586 | if (ret <= 0) goto end; | |
587 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
588 | s->init_num=0; | |
589 | break; | |
590 | ||
6434abbf DSH |
591 | #endif |
592 | ||
d02b48c6 RE |
593 | case SSL3_ST_SW_CHANGE_A: |
594 | case SSL3_ST_SW_CHANGE_B: | |
595 | ||
596 | s->session->cipher=s->s3->tmp.new_cipher; | |
58964a49 RE |
597 | if (!s->method->ssl3_enc->setup_key_block(s)) |
598 | { ret= -1; goto end; } | |
d02b48c6 RE |
599 | |
600 | ret=ssl3_send_change_cipher_spec(s, | |
601 | SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B); | |
602 | ||
603 | if (ret <= 0) goto end; | |
604 | s->state=SSL3_ST_SW_FINISHED_A; | |
605 | s->init_num=0; | |
606 | ||
58964a49 | 607 | if (!s->method->ssl3_enc->change_cipher_state(s, |
d02b48c6 RE |
608 | SSL3_CHANGE_CIPHER_SERVER_WRITE)) |
609 | { | |
610 | ret= -1; | |
611 | goto end; | |
612 | } | |
613 | ||
614 | break; | |
615 | ||
616 | case SSL3_ST_SW_FINISHED_A: | |
617 | case SSL3_ST_SW_FINISHED_B: | |
618 | ret=ssl3_send_finished(s, | |
619 | SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B, | |
c44f7540 BM |
620 | s->method->ssl3_enc->server_finished_label, |
621 | s->method->ssl3_enc->server_finished_label_len); | |
d02b48c6 RE |
622 | if (ret <= 0) goto end; |
623 | s->state=SSL3_ST_SW_FLUSH; | |
624 | if (s->hit) | |
625 | s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; | |
626 | else | |
627 | s->s3->tmp.next_state=SSL_ST_OK; | |
628 | s->init_num=0; | |
629 | break; | |
630 | ||
631 | case SSL_ST_OK: | |
632 | /* clean a few things up */ | |
633 | ssl3_cleanup_key_block(s); | |
634 | ||
635 | BUF_MEM_free(s->init_buf); | |
636 | s->init_buf=NULL; | |
637 | ||
638 | /* remove buffering on output */ | |
413c4f45 | 639 | ssl_free_wbio_buffer(s); |
d02b48c6 | 640 | |
d02b48c6 RE |
641 | s->init_num=0; |
642 | ||
8c74b5e5 | 643 | if (s->new_session == 2) /* skipped if we just sent a HelloRequest */ |
b49124f6 BM |
644 | { |
645 | /* actually not necessarily a 'new' session unless | |
646 | * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */ | |
647 | ||
648 | s->new_session=0; | |
649 | ||
650 | ssl_update_cache(s,SSL_SESS_CACHE_SERVER); | |
651 | ||
652 | s->ctx->stats.sess_accept_good++; | |
653 | /* s->server=1; */ | |
654 | s->handshake_func=ssl3_accept; | |
d02b48c6 | 655 | |
b49124f6 BM |
656 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); |
657 | } | |
658 | ||
681bfae4 | 659 | ret = 1; |
d02b48c6 | 660 | goto end; |
58964a49 | 661 | /* break; */ |
d02b48c6 RE |
662 | |
663 | default: | |
664 | SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE); | |
665 | ret= -1; | |
666 | goto end; | |
58964a49 | 667 | /* break; */ |
d02b48c6 RE |
668 | } |
669 | ||
670 | if (!s->s3->tmp.reuse_message && !skip) | |
671 | { | |
58964a49 RE |
672 | if (s->debug) |
673 | { | |
674 | if ((ret=BIO_flush(s->wbio)) <= 0) | |
675 | goto end; | |
676 | } | |
677 | ||
d02b48c6 RE |
678 | |
679 | if ((cb != NULL) && (s->state != state)) | |
680 | { | |
681 | new_state=s->state; | |
682 | s->state=state; | |
683 | cb(s,SSL_CB_ACCEPT_LOOP,1); | |
684 | s->state=new_state; | |
685 | } | |
686 | } | |
687 | skip=0; | |
688 | } | |
689 | end: | |
690 | /* BIO_flush(s->wbio); */ | |
691 | ||
4d635a70 | 692 | s->in_handshake--; |
d02b48c6 RE |
693 | if (cb != NULL) |
694 | cb(s,SSL_CB_ACCEPT_EXIT,ret); | |
d02b48c6 RE |
695 | return(ret); |
696 | } | |
697 | ||
36d16f8e | 698 | int ssl3_send_hello_request(SSL *s) |
d02b48c6 RE |
699 | { |
700 | unsigned char *p; | |
701 | ||
702 | if (s->state == SSL3_ST_SW_HELLO_REQ_A) | |
703 | { | |
704 | p=(unsigned char *)s->init_buf->data; | |
c51ae173 | 705 | *(p++)=SSL3_MT_HELLO_REQUEST; |
d02b48c6 RE |
706 | *(p++)=0; |
707 | *(p++)=0; | |
708 | *(p++)=0; | |
709 | ||
710 | s->state=SSL3_ST_SW_HELLO_REQ_B; | |
711 | /* number of bytes to write */ | |
712 | s->init_num=4; | |
713 | s->init_off=0; | |
714 | } | |
715 | ||
716 | /* SSL3_ST_SW_HELLO_REQ_B */ | |
717 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
718 | } | |
719 | ||
36d16f8e | 720 | int ssl3_check_client_hello(SSL *s) |
3d14b9d0 DSH |
721 | { |
722 | int ok; | |
723 | long n; | |
724 | ||
b78e5021 BM |
725 | /* this function is called when we really expect a Certificate message, |
726 | * so permit appropriate message length */ | |
36d16f8e | 727 | n=s->method->ssl_get_message(s, |
3d14b9d0 DSH |
728 | SSL3_ST_SR_CERT_A, |
729 | SSL3_ST_SR_CERT_B, | |
730 | -1, | |
c0f5dd07 | 731 | s->max_cert_list, |
3d14b9d0 DSH |
732 | &ok); |
733 | if (!ok) return((int)n); | |
734 | s->s3->tmp.reuse_message = 1; | |
a2a01589 BM |
735 | if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO) |
736 | { | |
737 | /* Throw away what we have done so far in the current handshake, | |
738 | * which will now be aborted. (A full SSL_clear would be too much.) | |
739 | * I hope that tmp.dh is the only thing that may need to be cleared | |
740 | * when a handshake is not completed ... */ | |
bc36ee62 | 741 | #ifndef OPENSSL_NO_DH |
a2a01589 BM |
742 | if (s->s3->tmp.dh != NULL) |
743 | { | |
744 | DH_free(s->s3->tmp.dh); | |
745 | s->s3->tmp.dh = NULL; | |
746 | } | |
747 | #endif | |
748 | return 2; | |
749 | } | |
3d14b9d0 DSH |
750 | return 1; |
751 | } | |
752 | ||
36d16f8e | 753 | int ssl3_get_client_hello(SSL *s) |
d02b48c6 RE |
754 | { |
755 | int i,j,ok,al,ret= -1; | |
6c61726b | 756 | unsigned int cookie_len; |
d02b48c6 RE |
757 | long n; |
758 | unsigned long id; | |
413c4f45 | 759 | unsigned char *p,*d,*q; |
d02b48c6 | 760 | SSL_CIPHER *c; |
09b6c2ef | 761 | #ifndef OPENSSL_NO_COMP |
413c4f45 | 762 | SSL_COMP *comp=NULL; |
09b6c2ef | 763 | #endif |
f73e07cf | 764 | STACK_OF(SSL_CIPHER) *ciphers=NULL; |
d02b48c6 | 765 | |
58964a49 RE |
766 | /* We do this so that we will respond with our native type. |
767 | * If we are TLSv1 and we get SSLv3, we will respond with TLSv1, | |
768 | * This down switching should be handled by a different method. | |
769 | * If we are SSLv3, we will respond with SSLv3, even if prompted with | |
770 | * TLSv1. | |
771 | */ | |
d02b48c6 RE |
772 | if (s->state == SSL3_ST_SR_CLNT_HELLO_A) |
773 | { | |
d02b48c6 RE |
774 | s->state=SSL3_ST_SR_CLNT_HELLO_B; |
775 | } | |
1e24b3a0 | 776 | s->first_packet=1; |
36d16f8e | 777 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
778 | SSL3_ST_SR_CLNT_HELLO_B, |
779 | SSL3_ST_SR_CLNT_HELLO_C, | |
780 | SSL3_MT_CLIENT_HELLO, | |
781 | SSL3_RT_MAX_PLAIN_LENGTH, | |
782 | &ok); | |
783 | ||
784 | if (!ok) return((int)n); | |
1e24b3a0 | 785 | s->first_packet=0; |
48948d53 | 786 | d=p=(unsigned char *)s->init_msg; |
d02b48c6 | 787 | |
074309b7 BM |
788 | /* use version from inside client hello, not from record header |
789 | * (may differ: see RFC 2246, Appendix E, second paragraph) */ | |
790 | s->client_version=(((int)p[0])<<8)|(int)p[1]; | |
d02b48c6 RE |
791 | p+=2; |
792 | ||
7432d073 AP |
793 | if ((s->version == DTLS1_VERSION && s->client_version > s->version) || |
794 | (s->version != DTLS1_VERSION && s->client_version < s->version)) | |
a661b653 BM |
795 | { |
796 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER); | |
89bbe14c | 797 | if ((s->client_version>>8) == SSL3_VERSION_MAJOR) |
a661b653 BM |
798 | { |
799 | /* similar to ssl3_get_record, send alert using remote version number */ | |
800 | s->version = s->client_version; | |
801 | } | |
802 | al = SSL_AD_PROTOCOL_VERSION; | |
803 | goto f_err; | |
804 | } | |
805 | ||
d02b48c6 RE |
806 | /* load the client random */ |
807 | memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE); | |
808 | p+=SSL3_RANDOM_SIZE; | |
809 | ||
810 | /* get the session-id */ | |
811 | j= *(p++); | |
812 | ||
813 | s->hit=0; | |
6b0e9fac BM |
814 | /* Versions before 0.9.7 always allow session reuse during renegotiation |
815 | * (i.e. when s->new_session is true), option | |
816 | * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is new with 0.9.7. | |
817 | * Maybe this optional behaviour should always have been the default, | |
818 | * but we cannot safely change the default behaviour (or new applications | |
819 | * might be written that become totally unsecure when compiled with | |
820 | * an earlier library version) | |
821 | */ | |
6434abbf | 822 | if ((s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION))) |
d02b48c6 RE |
823 | { |
824 | if (!ssl_get_new_session(s,1)) | |
825 | goto err; | |
826 | } | |
827 | else | |
828 | { | |
6434abbf | 829 | i=ssl_get_prev_session(s, p, j, d + n); |
d02b48c6 RE |
830 | if (i == 1) |
831 | { /* previous session */ | |
832 | s->hit=1; | |
833 | } | |
8876bc05 BM |
834 | else if (i == -1) |
835 | goto err; | |
836 | else /* i == 0 */ | |
d02b48c6 RE |
837 | { |
838 | if (!ssl_get_new_session(s,1)) | |
839 | goto err; | |
840 | } | |
841 | } | |
842 | ||
843 | p+=j; | |
36d16f8e | 844 | |
7432d073 | 845 | if (s->version == DTLS1_VERSION) |
36d16f8e BL |
846 | { |
847 | /* cookie stuff */ | |
848 | cookie_len = *(p++); | |
849 | ||
beb056b3 BM |
850 | if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) && |
851 | s->d1->send_cookie == 0) | |
852 | { | |
853 | /* HelloVerifyMessage has already been sent */ | |
854 | if ( cookie_len != s->d1->cookie_len) | |
855 | { | |
856 | al = SSL_AD_HANDSHAKE_FAILURE; | |
857 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH); | |
858 | goto f_err; | |
859 | } | |
860 | } | |
861 | ||
862 | /* | |
863 | * The ClientHello may contain a cookie even if the | |
864 | * HelloVerify message has not been sent--make sure that it | |
865 | * does not cause an overflow. | |
866 | */ | |
36d16f8e BL |
867 | if ( cookie_len > sizeof(s->d1->rcvd_cookie)) |
868 | { | |
869 | /* too much data */ | |
beb056b3 | 870 | al = SSL_AD_DECODE_ERROR; |
36d16f8e BL |
871 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH); |
872 | goto f_err; | |
873 | } | |
874 | ||
beb056b3 BM |
875 | /* verify the cookie if appropriate option is set. */ |
876 | if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) && | |
877 | cookie_len > 0) | |
878 | { | |
879 | memcpy(s->d1->rcvd_cookie, p, cookie_len); | |
880 | ||
881 | if ( s->ctx->app_verify_cookie_cb != NULL) | |
882 | { | |
883 | if ( s->ctx->app_verify_cookie_cb(s, s->d1->rcvd_cookie, | |
884 | cookie_len) == 0) | |
885 | { | |
886 | al=SSL_AD_HANDSHAKE_FAILURE; | |
887 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, | |
888 | SSL_R_COOKIE_MISMATCH); | |
889 | goto f_err; | |
890 | } | |
891 | /* else cookie verification succeeded */ | |
892 | } | |
893 | else if ( memcmp(s->d1->rcvd_cookie, s->d1->cookie, | |
894 | s->d1->cookie_len) != 0) /* default verification */ | |
895 | { | |
896 | al=SSL_AD_HANDSHAKE_FAILURE; | |
897 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, | |
898 | SSL_R_COOKIE_MISMATCH); | |
899 | goto f_err; | |
900 | } | |
901 | } | |
902 | ||
903 | p += cookie_len; | |
36d16f8e BL |
904 | } |
905 | ||
d02b48c6 RE |
906 | n2s(p,i); |
907 | if ((i == 0) && (j != 0)) | |
908 | { | |
909 | /* we need a cipher if we are not resuming a session */ | |
58964a49 | 910 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
911 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED); |
912 | goto f_err; | |
913 | } | |
82b0bf0b | 914 | if ((p+i) >= (d+n)) |
d02b48c6 RE |
915 | { |
916 | /* not enough data */ | |
58964a49 | 917 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
918 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); |
919 | goto f_err; | |
920 | } | |
921 | if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers)) | |
922 | == NULL)) | |
923 | { | |
924 | goto err; | |
925 | } | |
926 | p+=i; | |
927 | ||
928 | /* If it is a hit, check that the cipher is in the list */ | |
929 | if ((s->hit) && (i > 0)) | |
930 | { | |
931 | j=0; | |
932 | id=s->session->cipher->id; | |
933 | ||
413c4f45 MC |
934 | #ifdef CIPHER_DEBUG |
935 | printf("client sent %d ciphers\n",sk_num(ciphers)); | |
936 | #endif | |
f73e07cf | 937 | for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++) |
d02b48c6 | 938 | { |
f73e07cf | 939 | c=sk_SSL_CIPHER_value(ciphers,i); |
413c4f45 MC |
940 | #ifdef CIPHER_DEBUG |
941 | printf("client [%2d of %2d]:%s\n", | |
942 | i,sk_num(ciphers),SSL_CIPHER_get_name(c)); | |
943 | #endif | |
d02b48c6 RE |
944 | if (c->id == id) |
945 | { | |
946 | j=1; | |
947 | break; | |
948 | } | |
949 | } | |
950 | if (j == 0) | |
951 | { | |
f73e07cf | 952 | if ((s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1)) |
d02b48c6 RE |
953 | { |
954 | /* Very bad for multi-threading.... */ | |
beb056b3 | 955 | s->session->cipher=sk_SSL_CIPHER_value(ciphers, 0); |
d02b48c6 RE |
956 | } |
957 | else | |
958 | { | |
959 | /* we need to have the cipher in the cipher | |
960 | * list if we are asked to reuse it */ | |
58964a49 | 961 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
962 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING); |
963 | goto f_err; | |
964 | } | |
965 | } | |
966 | } | |
967 | ||
968 | /* compression */ | |
969 | i= *(p++); | |
82b0bf0b BM |
970 | if ((p+i) > (d+n)) |
971 | { | |
972 | /* not enough data */ | |
973 | al=SSL_AD_DECODE_ERROR; | |
974 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); | |
975 | goto f_err; | |
976 | } | |
413c4f45 | 977 | q=p; |
d02b48c6 | 978 | for (j=0; j<i; j++) |
413c4f45 | 979 | { |
d02b48c6 | 980 | if (p[j] == 0) break; |
413c4f45 | 981 | } |
d02b48c6 RE |
982 | |
983 | p+=i; | |
984 | if (j >= i) | |
985 | { | |
986 | /* no compress */ | |
58964a49 | 987 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
988 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED); |
989 | goto f_err; | |
990 | } | |
991 | ||
58ece833 BM |
992 | #ifndef OPENSSL_NO_TLSEXT |
993 | /* TLS extensions*/ | |
994 | if (s->version > SSL3_VERSION) | |
995 | { | |
996 | if (!ssl_parse_clienthello_tlsext(s,&p,d,n, &al)) | |
997 | { | |
998 | /* 'al' set by ssl_parse_clienthello_tlsext */ | |
36ca4ba6 | 999 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_PARSE_TLSEXT); |
58ece833 BM |
1000 | goto f_err; |
1001 | } | |
1002 | } | |
36ca4ba6 | 1003 | if (ssl_check_clienthello_tlsext(s) <= 0) { |
a291745e | 1004 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); |
58ece833 BM |
1005 | goto err; |
1006 | } | |
1007 | #endif | |
1008 | ||
413c4f45 MC |
1009 | /* Worst case, we will use the NULL compression, but if we have other |
1010 | * options, we will now look for them. We have i-1 compression | |
1011 | * algorithms from the client, starting at q. */ | |
1012 | s->s3->tmp.new_compression=NULL; | |
09b6c2ef | 1013 | #ifndef OPENSSL_NO_COMP |
566dda07 | 1014 | if (!(s->options & SSL_OP_NO_COMPRESSION) && s->ctx->comp_methods) |
413c4f45 MC |
1015 | { /* See if we have a match */ |
1016 | int m,nn,o,v,done=0; | |
1017 | ||
f73e07cf | 1018 | nn=sk_SSL_COMP_num(s->ctx->comp_methods); |
413c4f45 MC |
1019 | for (m=0; m<nn; m++) |
1020 | { | |
f73e07cf | 1021 | comp=sk_SSL_COMP_value(s->ctx->comp_methods,m); |
413c4f45 MC |
1022 | v=comp->id; |
1023 | for (o=0; o<i; o++) | |
1024 | { | |
1025 | if (v == q[o]) | |
1026 | { | |
1027 | done=1; | |
1028 | break; | |
1029 | } | |
1030 | } | |
1031 | if (done) break; | |
1032 | } | |
1033 | if (done) | |
1034 | s->s3->tmp.new_compression=comp; | |
1035 | else | |
1036 | comp=NULL; | |
1037 | } | |
09b6c2ef | 1038 | #endif |
413c4f45 | 1039 | |
836f9960 | 1040 | /* Given s->session->ciphers and SSL_get_ciphers, we must |
d02b48c6 RE |
1041 | * pick a cipher */ |
1042 | ||
1043 | if (!s->hit) | |
1044 | { | |
09b6c2ef DSH |
1045 | #ifdef OPENSSL_NO_COMP |
1046 | s->session->compress_meth=0; | |
1047 | #else | |
413c4f45 | 1048 | s->session->compress_meth=(comp == NULL)?0:comp->id; |
09b6c2ef | 1049 | #endif |
d02b48c6 | 1050 | if (s->session->ciphers != NULL) |
f73e07cf | 1051 | sk_SSL_CIPHER_free(s->session->ciphers); |
d02b48c6 RE |
1052 | s->session->ciphers=ciphers; |
1053 | if (ciphers == NULL) | |
1054 | { | |
58964a49 | 1055 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
1056 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED); |
1057 | goto f_err; | |
1058 | } | |
1059 | ciphers=NULL; | |
1060 | c=ssl3_choose_cipher(s,s->session->ciphers, | |
836f9960 | 1061 | SSL_get_ciphers(s)); |
d02b48c6 RE |
1062 | |
1063 | if (c == NULL) | |
1064 | { | |
58964a49 | 1065 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1066 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER); |
1067 | goto f_err; | |
1068 | } | |
1069 | s->s3->tmp.new_cipher=c; | |
1070 | } | |
1071 | else | |
1072 | { | |
1073 | /* Session-id reuse */ | |
1074 | #ifdef REUSE_CIPHER_BUG | |
f73e07cf | 1075 | STACK_OF(SSL_CIPHER) *sk; |
d02b48c6 RE |
1076 | SSL_CIPHER *nc=NULL; |
1077 | SSL_CIPHER *ec=NULL; | |
1078 | ||
58964a49 | 1079 | if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG) |
d02b48c6 RE |
1080 | { |
1081 | sk=s->session->ciphers; | |
f73e07cf | 1082 | for (i=0; i<sk_SSL_CIPHER_num(sk); i++) |
d02b48c6 | 1083 | { |
f73e07cf | 1084 | c=sk_SSL_CIPHER_value(sk,i); |
52b8dad8 | 1085 | if (c->algorithm_enc & SSL_eNULL) |
d02b48c6 | 1086 | nc=c; |
06ab81f9 | 1087 | if (SSL_C_IS_EXPORT(c)) |
d02b48c6 RE |
1088 | ec=c; |
1089 | } | |
1090 | if (nc != NULL) | |
1091 | s->s3->tmp.new_cipher=nc; | |
1092 | else if (ec != NULL) | |
1093 | s->s3->tmp.new_cipher=ec; | |
1094 | else | |
1095 | s->s3->tmp.new_cipher=s->session->cipher; | |
1096 | } | |
1097 | else | |
1098 | #endif | |
1099 | s->s3->tmp.new_cipher=s->session->cipher; | |
1100 | } | |
30551400 DSH |
1101 | |
1102 | ssl3_digest_cached_records(s); | |
d02b48c6 RE |
1103 | |
1104 | /* we now have the following setup. | |
1105 | * client_random | |
1106 | * cipher_list - our prefered list of ciphers | |
1107 | * ciphers - the clients prefered list of ciphers | |
1108 | * compression - basically ignored right now | |
1109 | * ssl version is set - sslv3 | |
1110 | * s->session - The ssl session has been setup. | |
657e60fa | 1111 | * s->hit - session reuse flag |
d02b48c6 RE |
1112 | * s->tmp.new_cipher - the new cipher to use. |
1113 | */ | |
1114 | ||
1115 | ret=1; | |
1116 | if (0) | |
1117 | { | |
1118 | f_err: | |
1119 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1120 | } | |
1121 | err: | |
f73e07cf | 1122 | if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers); |
d02b48c6 RE |
1123 | return(ret); |
1124 | } | |
1125 | ||
36d16f8e | 1126 | int ssl3_send_server_hello(SSL *s) |
d02b48c6 RE |
1127 | { |
1128 | unsigned char *buf; | |
1129 | unsigned char *p,*d; | |
1130 | int i,sl; | |
1131 | unsigned long l,Time; | |
1132 | ||
1133 | if (s->state == SSL3_ST_SW_SRVR_HELLO_A) | |
1134 | { | |
1135 | buf=(unsigned char *)s->init_buf->data; | |
1136 | p=s->s3->server_random; | |
7bbcb2f6 | 1137 | Time=(unsigned long)time(NULL); /* Time */ |
d02b48c6 | 1138 | l2n(Time,p); |
7c7667b8 NL |
1139 | if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) |
1140 | return -1; | |
d02b48c6 RE |
1141 | /* Do the message type and length last */ |
1142 | d=p= &(buf[4]); | |
1143 | ||
58964a49 RE |
1144 | *(p++)=s->version>>8; |
1145 | *(p++)=s->version&0xff; | |
d02b48c6 RE |
1146 | |
1147 | /* Random stuff */ | |
1148 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
1149 | p+=SSL3_RANDOM_SIZE; | |
1150 | ||
1151 | /* now in theory we have 3 options to sending back the | |
1152 | * session id. If it is a re-use, we send back the | |
1153 | * old session-id, if it is a new session, we send | |
1154 | * back the new session-id or we send back a 0 length | |
1155 | * session-id if we want it to be single use. | |
1156 | * Currently I will not implement the '0' length session-id | |
58964a49 | 1157 | * 12-Jan-98 - I'll now support the '0' length stuff. |
dc634aff DSH |
1158 | * |
1159 | * We also have an additional case where stateless session | |
1160 | * resumption is successful: we always send back the old | |
1161 | * session id. In this case s->hit is non zero: this can | |
1162 | * only happen if stateless session resumption is succesful | |
1163 | * if session caching is disabled so existing functionality | |
1164 | * is unaffected. | |
d02b48c6 | 1165 | */ |
dc634aff DSH |
1166 | if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER) |
1167 | && !s->hit) | |
58964a49 | 1168 | s->session->session_id_length=0; |
d02b48c6 RE |
1169 | |
1170 | sl=s->session->session_id_length; | |
27545970 | 1171 | if (sl > (int)sizeof(s->session->session_id)) |
5574e0ed BM |
1172 | { |
1173 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1174 | return -1; | |
1175 | } | |
d02b48c6 RE |
1176 | *(p++)=sl; |
1177 | memcpy(p,s->session->session_id,sl); | |
1178 | p+=sl; | |
1179 | ||
1180 | /* put the cipher */ | |
1181 | i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p); | |
1182 | p+=i; | |
1183 | ||
1184 | /* put the compression method */ | |
09b6c2ef DSH |
1185 | #ifdef OPENSSL_NO_COMP |
1186 | *(p++)=0; | |
1187 | #else | |
413c4f45 MC |
1188 | if (s->s3->tmp.new_compression == NULL) |
1189 | *(p++)=0; | |
1190 | else | |
1191 | *(p++)=s->s3->tmp.new_compression->id; | |
09b6c2ef | 1192 | #endif |
ed3883d2 | 1193 | #ifndef OPENSSL_NO_TLSEXT |
36ca4ba6 BM |
1194 | if (ssl_prepare_serverhello_tlsext(s) <= 0) |
1195 | { | |
1196 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); | |
1197 | return -1; | |
1198 | } | |
f1fd4544 BM |
1199 | if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) |
1200 | { | |
ed3883d2 BM |
1201 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR); |
1202 | return -1; | |
f1fd4544 | 1203 | } |
ed3883d2 | 1204 | #endif |
d02b48c6 RE |
1205 | /* do the header */ |
1206 | l=(p-d); | |
1207 | d=buf; | |
1208 | *(d++)=SSL3_MT_SERVER_HELLO; | |
1209 | l2n3(l,d); | |
1210 | ||
e65bcbce | 1211 | s->state=SSL3_ST_SW_CLNT_HELLO_B; |
d02b48c6 RE |
1212 | /* number of bytes to write */ |
1213 | s->init_num=p-buf; | |
1214 | s->init_off=0; | |
1215 | } | |
1216 | ||
e65bcbce | 1217 | /* SSL3_ST_SW_CLNT_HELLO_B */ |
d02b48c6 RE |
1218 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); |
1219 | } | |
1220 | ||
36d16f8e | 1221 | int ssl3_send_server_done(SSL *s) |
d02b48c6 RE |
1222 | { |
1223 | unsigned char *p; | |
1224 | ||
1225 | if (s->state == SSL3_ST_SW_SRVR_DONE_A) | |
1226 | { | |
1227 | p=(unsigned char *)s->init_buf->data; | |
1228 | ||
1229 | /* do the header */ | |
1230 | *(p++)=SSL3_MT_SERVER_DONE; | |
1231 | *(p++)=0; | |
1232 | *(p++)=0; | |
1233 | *(p++)=0; | |
1234 | ||
1235 | s->state=SSL3_ST_SW_SRVR_DONE_B; | |
1236 | /* number of bytes to write */ | |
1237 | s->init_num=4; | |
1238 | s->init_off=0; | |
1239 | } | |
1240 | ||
e65bcbce | 1241 | /* SSL3_ST_SW_SRVR_DONE_B */ |
d02b48c6 RE |
1242 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); |
1243 | } | |
1244 | ||
36d16f8e | 1245 | int ssl3_send_server_key_exchange(SSL *s) |
d02b48c6 | 1246 | { |
bc36ee62 | 1247 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
1248 | unsigned char *q; |
1249 | int j,num; | |
1250 | RSA *rsa; | |
1251 | unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; | |
752d706a | 1252 | unsigned int u; |
d02b48c6 | 1253 | #endif |
bc36ee62 | 1254 | #ifndef OPENSSL_NO_DH |
9d1a01be | 1255 | DH *dh=NULL,*dhp; |
ea262260 BM |
1256 | #endif |
1257 | #ifndef OPENSSL_NO_ECDH | |
1258 | EC_KEY *ecdh=NULL, *ecdhp; | |
1259 | unsigned char *encodedPoint = NULL; | |
1260 | int encodedlen = 0; | |
1261 | int curve_id = 0; | |
1262 | BN_CTX *bn_ctx = NULL; | |
d02b48c6 RE |
1263 | #endif |
1264 | EVP_PKEY *pkey; | |
1265 | unsigned char *p,*d; | |
1266 | int al,i; | |
1267 | unsigned long type; | |
1268 | int n; | |
1269 | CERT *cert; | |
1270 | BIGNUM *r[4]; | |
1271 | int nr[4],kn; | |
1272 | BUF_MEM *buf; | |
1273 | EVP_MD_CTX md_ctx; | |
1274 | ||
dbad1690 | 1275 | EVP_MD_CTX_init(&md_ctx); |
d02b48c6 RE |
1276 | if (s->state == SSL3_ST_SW_KEY_EXCH_A) |
1277 | { | |
52b8dad8 | 1278 | type=s->s3->tmp.new_cipher->algorithm_mkey; |
b56bce4f | 1279 | cert=s->cert; |
d02b48c6 RE |
1280 | |
1281 | buf=s->init_buf; | |
1282 | ||
1283 | r[0]=r[1]=r[2]=r[3]=NULL; | |
1284 | n=0; | |
bc36ee62 | 1285 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
1286 | if (type & SSL_kRSA) |
1287 | { | |
1288 | rsa=cert->rsa_tmp; | |
ca8e5b9b | 1289 | if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL)) |
d02b48c6 | 1290 | { |
ca8e5b9b | 1291 | rsa=s->cert->rsa_tmp_cb(s, |
f415fa32 | 1292 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), |
60e31c3a | 1293 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); |
fbb41ae0 DSH |
1294 | if(rsa == NULL) |
1295 | { | |
1296 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1297 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY); | |
1298 | goto f_err; | |
1299 | } | |
6ac4e8bd | 1300 | RSA_up_ref(rsa); |
d02b48c6 RE |
1301 | cert->rsa_tmp=rsa; |
1302 | } | |
1303 | if (rsa == NULL) | |
1304 | { | |
58964a49 | 1305 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1306 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY); |
1307 | goto f_err; | |
1308 | } | |
1309 | r[0]=rsa->n; | |
1310 | r[1]=rsa->e; | |
1311 | s->s3->tmp.use_rsa_tmp=1; | |
1312 | } | |
1313 | else | |
1314 | #endif | |
bc36ee62 | 1315 | #ifndef OPENSSL_NO_DH |
d02b48c6 RE |
1316 | if (type & SSL_kEDH) |
1317 | { | |
1318 | dhp=cert->dh_tmp; | |
ca8e5b9b BM |
1319 | if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL)) |
1320 | dhp=s->cert->dh_tmp_cb(s, | |
2c05c494 | 1321 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), |
60e31c3a | 1322 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); |
d02b48c6 RE |
1323 | if (dhp == NULL) |
1324 | { | |
58964a49 | 1325 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1326 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
1327 | goto f_err; | |
1328 | } | |
a87030a1 BM |
1329 | |
1330 | if (s->s3->tmp.dh != NULL) | |
1331 | { | |
1332 | DH_free(dh); | |
5277d7cb | 1333 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
a87030a1 BM |
1334 | goto err; |
1335 | } | |
1336 | ||
d02b48c6 RE |
1337 | if ((dh=DHparams_dup(dhp)) == NULL) |
1338 | { | |
1339 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1340 | goto err; | |
1341 | } | |
1342 | ||
1343 | s->s3->tmp.dh=dh; | |
6fa89f94 BL |
1344 | if ((dhp->pub_key == NULL || |
1345 | dhp->priv_key == NULL || | |
1346 | (s->options & SSL_OP_SINGLE_DH_USE))) | |
d02b48c6 | 1347 | { |
6fa89f94 BL |
1348 | if(!DH_generate_key(dh)) |
1349 | { | |
1350 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, | |
1351 | ERR_R_DH_LIB); | |
1352 | goto err; | |
1353 | } | |
d02b48c6 RE |
1354 | } |
1355 | else | |
1356 | { | |
1357 | dh->pub_key=BN_dup(dhp->pub_key); | |
1358 | dh->priv_key=BN_dup(dhp->priv_key); | |
1359 | if ((dh->pub_key == NULL) || | |
1360 | (dh->priv_key == NULL)) | |
1361 | { | |
1362 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1363 | goto err; | |
1364 | } | |
1365 | } | |
1366 | r[0]=dh->p; | |
1367 | r[1]=dh->g; | |
1368 | r[2]=dh->pub_key; | |
1369 | } | |
1370 | else | |
1371 | #endif | |
ea262260 | 1372 | #ifndef OPENSSL_NO_ECDH |
89bbe14c | 1373 | if (type & SSL_kEECDH) |
ea262260 | 1374 | { |
9dd84053 NL |
1375 | const EC_GROUP *group; |
1376 | ||
ea262260 BM |
1377 | ecdhp=cert->ecdh_tmp; |
1378 | if ((ecdhp == NULL) && (s->cert->ecdh_tmp_cb != NULL)) | |
1379 | { | |
1380 | ecdhp=s->cert->ecdh_tmp_cb(s, | |
1381 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), | |
1382 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); | |
1383 | } | |
1384 | if (ecdhp == NULL) | |
1385 | { | |
1386 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1387 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); | |
1388 | goto f_err; | |
1389 | } | |
1390 | ||
1391 | if (s->s3->tmp.ecdh != NULL) | |
1392 | { | |
1393 | EC_KEY_free(s->s3->tmp.ecdh); | |
1394 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
1395 | goto err; | |
1396 | } | |
1397 | ||
1398 | /* Duplicate the ECDH structure. */ | |
1399 | if (ecdhp == NULL) | |
1400 | { | |
1401 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1402 | goto err; | |
1403 | } | |
1404 | if (!EC_KEY_up_ref(ecdhp)) | |
1405 | { | |
aa4ce731 | 1406 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); |
ea262260 BM |
1407 | goto err; |
1408 | } | |
1409 | ecdh = ecdhp; | |
1410 | ||
1411 | s->s3->tmp.ecdh=ecdh; | |
9dd84053 NL |
1412 | if ((EC_KEY_get0_public_key(ecdh) == NULL) || |
1413 | (EC_KEY_get0_private_key(ecdh) == NULL) || | |
ea262260 BM |
1414 | (s->options & SSL_OP_SINGLE_ECDH_USE)) |
1415 | { | |
1416 | if(!EC_KEY_generate_key(ecdh)) | |
1417 | { | |
1418 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1419 | goto err; | |
1420 | } | |
1421 | } | |
1422 | ||
9dd84053 NL |
1423 | if (((group = EC_KEY_get0_group(ecdh)) == NULL) || |
1424 | (EC_KEY_get0_public_key(ecdh) == NULL) || | |
1425 | (EC_KEY_get0_private_key(ecdh) == NULL)) | |
ea262260 BM |
1426 | { |
1427 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1428 | goto err; | |
1429 | } | |
1430 | ||
1431 | if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && | |
9dd84053 | 1432 | (EC_GROUP_get_degree(group) > 163)) |
ea262260 BM |
1433 | { |
1434 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); | |
1435 | goto err; | |
1436 | } | |
1437 | ||
1438 | /* XXX: For now, we only support ephemeral ECDH | |
1439 | * keys over named (not generic) curves. For | |
1440 | * supported named curves, curve_id is non-zero. | |
1441 | */ | |
1442 | if ((curve_id = | |
33273721 | 1443 | tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group))) |
ea262260 BM |
1444 | == 0) |
1445 | { | |
1446 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE); | |
1447 | goto err; | |
1448 | } | |
1449 | ||
1450 | /* Encode the public key. | |
1451 | * First check the size of encoding and | |
1452 | * allocate memory accordingly. | |
1453 | */ | |
9dd84053 NL |
1454 | encodedlen = EC_POINT_point2oct(group, |
1455 | EC_KEY_get0_public_key(ecdh), | |
ea262260 BM |
1456 | POINT_CONVERSION_UNCOMPRESSED, |
1457 | NULL, 0, NULL); | |
1458 | ||
1459 | encodedPoint = (unsigned char *) | |
1460 | OPENSSL_malloc(encodedlen*sizeof(unsigned char)); | |
1461 | bn_ctx = BN_CTX_new(); | |
1462 | if ((encodedPoint == NULL) || (bn_ctx == NULL)) | |
1463 | { | |
1464 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); | |
1465 | goto err; | |
1466 | } | |
1467 | ||
1468 | ||
9dd84053 NL |
1469 | encodedlen = EC_POINT_point2oct(group, |
1470 | EC_KEY_get0_public_key(ecdh), | |
ea262260 BM |
1471 | POINT_CONVERSION_UNCOMPRESSED, |
1472 | encodedPoint, encodedlen, bn_ctx); | |
1473 | ||
1474 | if (encodedlen == 0) | |
1475 | { | |
1476 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1477 | goto err; | |
1478 | } | |
1479 | ||
1480 | BN_CTX_free(bn_ctx); bn_ctx=NULL; | |
1481 | ||
1482 | /* XXX: For now, we only support named (not | |
1483 | * generic) curves in ECDH ephemeral key exchanges. | |
d56349a2 | 1484 | * In this situation, we need four additional bytes |
ea262260 BM |
1485 | * to encode the entire ServerECDHParams |
1486 | * structure. | |
1487 | */ | |
d56349a2 | 1488 | n = 4 + encodedlen; |
ea262260 BM |
1489 | |
1490 | /* We'll generate the serverKeyExchange message | |
1491 | * explicitly so we can set these to NULLs | |
1492 | */ | |
1493 | r[0]=NULL; | |
1494 | r[1]=NULL; | |
1495 | r[2]=NULL; | |
d56349a2 | 1496 | r[3]=NULL; |
ea262260 BM |
1497 | } |
1498 | else | |
1499 | #endif /* !OPENSSL_NO_ECDH */ | |
ddac1974 NL |
1500 | #ifndef OPENSSL_NO_PSK |
1501 | if (type & SSL_kPSK) | |
1502 | { | |
1503 | /* reserve size for record length and PSK identity hint*/ | |
1504 | n+=2+strlen(s->ctx->psk_identity_hint); | |
1505 | } | |
1506 | else | |
1507 | #endif /* !OPENSSL_NO_PSK */ | |
d02b48c6 | 1508 | { |
58964a49 | 1509 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1510 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); |
1511 | goto f_err; | |
1512 | } | |
1513 | for (i=0; r[i] != NULL; i++) | |
1514 | { | |
1515 | nr[i]=BN_num_bytes(r[i]); | |
1516 | n+=2+nr[i]; | |
1517 | } | |
1518 | ||
52b8dad8 BM |
1519 | if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) |
1520 | && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) | |
d02b48c6 RE |
1521 | { |
1522 | if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher)) | |
1523 | == NULL) | |
1524 | { | |
58964a49 | 1525 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1526 | goto f_err; |
1527 | } | |
1528 | kn=EVP_PKEY_size(pkey); | |
1529 | } | |
1530 | else | |
1531 | { | |
1532 | pkey=NULL; | |
1533 | kn=0; | |
1534 | } | |
1535 | ||
54a656ef | 1536 | if (!BUF_MEM_grow_clean(buf,n+4+kn)) |
d02b48c6 RE |
1537 | { |
1538 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF); | |
1539 | goto err; | |
1540 | } | |
1541 | d=(unsigned char *)s->init_buf->data; | |
1542 | p= &(d[4]); | |
1543 | ||
1544 | for (i=0; r[i] != NULL; i++) | |
1545 | { | |
1546 | s2n(nr[i],p); | |
1547 | BN_bn2bin(r[i],p); | |
1548 | p+=nr[i]; | |
1549 | } | |
1550 | ||
ea262260 | 1551 | #ifndef OPENSSL_NO_ECDH |
89bbe14c | 1552 | if (type & SSL_kEECDH) |
ea262260 BM |
1553 | { |
1554 | /* XXX: For now, we only support named (not generic) curves. | |
1555 | * In this situation, the serverKeyExchange message has: | |
d56349a2 | 1556 | * [1 byte CurveType], [2 byte CurveName] |
ea262260 BM |
1557 | * [1 byte length of encoded point], followed by |
1558 | * the actual encoded point itself | |
1559 | */ | |
1560 | *p = NAMED_CURVE_TYPE; | |
1561 | p += 1; | |
d56349a2 BM |
1562 | *p = 0; |
1563 | p += 1; | |
ea262260 BM |
1564 | *p = curve_id; |
1565 | p += 1; | |
1566 | *p = encodedlen; | |
1567 | p += 1; | |
1568 | memcpy((unsigned char*)p, | |
1569 | (unsigned char *)encodedPoint, | |
1570 | encodedlen); | |
1571 | OPENSSL_free(encodedPoint); | |
1572 | p += encodedlen; | |
1573 | } | |
1574 | #endif | |
1575 | ||
ddac1974 NL |
1576 | #ifndef OPENSSL_NO_PSK |
1577 | if (type & SSL_kPSK) | |
1578 | { | |
1579 | /* copy PSK identity hint */ | |
1580 | s2n(strlen(s->ctx->psk_identity_hint), p); | |
07ef6129 | 1581 | strncpy((char *)p, s->ctx->psk_identity_hint, strlen(s->ctx->psk_identity_hint)); |
ddac1974 NL |
1582 | p+=strlen(s->ctx->psk_identity_hint); |
1583 | } | |
1584 | #endif | |
1585 | ||
d02b48c6 RE |
1586 | /* not anonymous */ |
1587 | if (pkey != NULL) | |
1588 | { | |
1589 | /* n is the length of the params, they start at &(d[4]) | |
1590 | * and p points to the space at the end. */ | |
bc36ee62 | 1591 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
1592 | if (pkey->type == EVP_PKEY_RSA) |
1593 | { | |
1594 | q=md_buf; | |
1595 | j=0; | |
1596 | for (num=2; num > 0; num--) | |
1597 | { | |
20d2186c DSH |
1598 | EVP_DigestInit_ex(&md_ctx,(num == 2) |
1599 | ?s->ctx->md5:s->ctx->sha1, NULL); | |
d02b48c6 RE |
1600 | EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); |
1601 | EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
1602 | EVP_DigestUpdate(&md_ctx,&(d[4]),n); | |
20d2186c | 1603 | EVP_DigestFinal_ex(&md_ctx,q, |
d02b48c6 RE |
1604 | (unsigned int *)&i); |
1605 | q+=i; | |
1606 | j+=i; | |
1607 | } | |
1c80019a | 1608 | if (RSA_sign(NID_md5_sha1, md_buf, j, |
ca7fea96 | 1609 | &(p[2]), &u, pkey->pkey.rsa) <= 0) |
d02b48c6 RE |
1610 | { |
1611 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA); | |
1612 | goto err; | |
1613 | } | |
ca7fea96 BL |
1614 | s2n(u,p); |
1615 | n+=u+2; | |
d02b48c6 RE |
1616 | } |
1617 | else | |
1618 | #endif | |
bc36ee62 | 1619 | #if !defined(OPENSSL_NO_DSA) |
d02b48c6 RE |
1620 | if (pkey->type == EVP_PKEY_DSA) |
1621 | { | |
1622 | /* lets do DSS */ | |
20d2186c | 1623 | EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL); |
d02b48c6 RE |
1624 | EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); |
1625 | EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
1626 | EVP_SignUpdate(&md_ctx,&(d[4]),n); | |
1627 | if (!EVP_SignFinal(&md_ctx,&(p[2]), | |
1628 | (unsigned int *)&i,pkey)) | |
1629 | { | |
1630 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA); | |
1631 | goto err; | |
1632 | } | |
1633 | s2n(i,p); | |
1634 | n+=i+2; | |
1635 | } | |
1636 | else | |
ea262260 BM |
1637 | #endif |
1638 | #if !defined(OPENSSL_NO_ECDSA) | |
5488bb61 | 1639 | if (pkey->type == EVP_PKEY_EC) |
ea262260 BM |
1640 | { |
1641 | /* let's do ECDSA */ | |
1642 | EVP_SignInit_ex(&md_ctx,EVP_ecdsa(), NULL); | |
1643 | EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); | |
1644 | EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
1645 | EVP_SignUpdate(&md_ctx,&(d[4]),n); | |
1646 | if (!EVP_SignFinal(&md_ctx,&(p[2]), | |
1647 | (unsigned int *)&i,pkey)) | |
1648 | { | |
1649 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_ECDSA); | |
1650 | goto err; | |
1651 | } | |
1652 | s2n(i,p); | |
1653 | n+=i+2; | |
1654 | } | |
1655 | else | |
d02b48c6 RE |
1656 | #endif |
1657 | { | |
1658 | /* Is this error check actually needed? */ | |
58964a49 | 1659 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1660 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE); |
1661 | goto f_err; | |
1662 | } | |
1663 | } | |
1664 | ||
1665 | *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE; | |
1666 | l2n3(n,d); | |
1667 | ||
1668 | /* we should now have things packed up, so lets send | |
1669 | * it off */ | |
1670 | s->init_num=n+4; | |
1671 | s->init_off=0; | |
1672 | } | |
1673 | ||
a87030a1 | 1674 | s->state = SSL3_ST_SW_KEY_EXCH_B; |
dbad1690 | 1675 | EVP_MD_CTX_cleanup(&md_ctx); |
d02b48c6 RE |
1676 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); |
1677 | f_err: | |
1678 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1679 | err: | |
ea262260 BM |
1680 | #ifndef OPENSSL_NO_ECDH |
1681 | if (encodedPoint != NULL) OPENSSL_free(encodedPoint); | |
1682 | BN_CTX_free(bn_ctx); | |
1683 | #endif | |
dbad1690 | 1684 | EVP_MD_CTX_cleanup(&md_ctx); |
d02b48c6 RE |
1685 | return(-1); |
1686 | } | |
1687 | ||
36d16f8e | 1688 | int ssl3_send_certificate_request(SSL *s) |
d02b48c6 RE |
1689 | { |
1690 | unsigned char *p,*d; | |
1691 | int i,j,nl,off,n; | |
f73e07cf | 1692 | STACK_OF(X509_NAME) *sk=NULL; |
d02b48c6 RE |
1693 | X509_NAME *name; |
1694 | BUF_MEM *buf; | |
1695 | ||
1696 | if (s->state == SSL3_ST_SW_CERT_REQ_A) | |
1697 | { | |
1698 | buf=s->init_buf; | |
1699 | ||
1700 | d=p=(unsigned char *)&(buf->data[4]); | |
1701 | ||
1702 | /* get the list of acceptable cert types */ | |
1703 | p++; | |
1704 | n=ssl3_get_req_cert_type(s,p); | |
1705 | d[0]=n; | |
1706 | p+=n; | |
1707 | n++; | |
1708 | ||
1709 | off=n; | |
1710 | p+=2; | |
1711 | n+=2; | |
1712 | ||
1713 | sk=SSL_get_client_CA_list(s); | |
1714 | nl=0; | |
1715 | if (sk != NULL) | |
1716 | { | |
f73e07cf | 1717 | for (i=0; i<sk_X509_NAME_num(sk); i++) |
d02b48c6 | 1718 | { |
f73e07cf | 1719 | name=sk_X509_NAME_value(sk,i); |
d02b48c6 | 1720 | j=i2d_X509_NAME(name,NULL); |
54a656ef | 1721 | if (!BUF_MEM_grow_clean(buf,4+n+j+2)) |
d02b48c6 RE |
1722 | { |
1723 | SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB); | |
1724 | goto err; | |
1725 | } | |
1726 | p=(unsigned char *)&(buf->data[4+n]); | |
58964a49 | 1727 | if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) |
d02b48c6 RE |
1728 | { |
1729 | s2n(j,p); | |
1730 | i2d_X509_NAME(name,&p); | |
1731 | n+=2+j; | |
1732 | nl+=2+j; | |
1733 | } | |
1734 | else | |
1735 | { | |
1736 | d=p; | |
1737 | i2d_X509_NAME(name,&p); | |
1738 | j-=2; s2n(j,d); j+=2; | |
1739 | n+=j; | |
1740 | nl+=j; | |
1741 | } | |
1742 | } | |
1743 | } | |
1744 | /* else no CA names */ | |
1745 | p=(unsigned char *)&(buf->data[4+off]); | |
1746 | s2n(nl,p); | |
1747 | ||
1748 | d=(unsigned char *)buf->data; | |
1749 | *(d++)=SSL3_MT_CERTIFICATE_REQUEST; | |
1750 | l2n3(n,d); | |
1751 | ||
1752 | /* we should now have things packed up, so lets send | |
1753 | * it off */ | |
1754 | ||
1755 | s->init_num=n+4; | |
1756 | s->init_off=0; | |
de469ef2 DSH |
1757 | #ifdef NETSCAPE_HANG_BUG |
1758 | p=(unsigned char *)s->init_buf->data + s->init_num; | |
1759 | ||
1760 | /* do the header */ | |
1761 | *(p++)=SSL3_MT_SERVER_DONE; | |
1762 | *(p++)=0; | |
1763 | *(p++)=0; | |
1764 | *(p++)=0; | |
1765 | s->init_num += 4; | |
1766 | #endif | |
1767 | ||
e59659dc | 1768 | s->state = SSL3_ST_SW_CERT_REQ_B; |
d02b48c6 RE |
1769 | } |
1770 | ||
1771 | /* SSL3_ST_SW_CERT_REQ_B */ | |
1772 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
1773 | err: | |
1774 | return(-1); | |
1775 | } | |
1776 | ||
36d16f8e | 1777 | int ssl3_get_client_key_exchange(SSL *s) |
d02b48c6 RE |
1778 | { |
1779 | int i,al,ok; | |
1780 | long n; | |
52b8dad8 | 1781 | unsigned long alg_k; |
d02b48c6 | 1782 | unsigned char *p; |
bc36ee62 | 1783 | #ifndef OPENSSL_NO_RSA |
d02b48c6 | 1784 | RSA *rsa=NULL; |
d02b48c6 | 1785 | EVP_PKEY *pkey=NULL; |
79df9d62 | 1786 | #endif |
bc36ee62 | 1787 | #ifndef OPENSSL_NO_DH |
58964a49 | 1788 | BIGNUM *pub=NULL; |
d02b48c6 | 1789 | DH *dh_srvr; |
58964a49 | 1790 | #endif |
bc36ee62 | 1791 | #ifndef OPENSSL_NO_KRB5 |
52b8dad8 | 1792 | KSSL_ERR kssl_err; |
bc36ee62 | 1793 | #endif /* OPENSSL_NO_KRB5 */ |
d02b48c6 | 1794 | |
ea262260 BM |
1795 | #ifndef OPENSSL_NO_ECDH |
1796 | EC_KEY *srvr_ecdh = NULL; | |
1797 | EVP_PKEY *clnt_pub_pkey = NULL; | |
1798 | EC_POINT *clnt_ecpoint = NULL; | |
1799 | BN_CTX *bn_ctx = NULL; | |
1800 | #endif | |
1801 | ||
36d16f8e | 1802 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
1803 | SSL3_ST_SR_KEY_EXCH_A, |
1804 | SSL3_ST_SR_KEY_EXCH_B, | |
1805 | SSL3_MT_CLIENT_KEY_EXCHANGE, | |
73969585 | 1806 | 2048, /* ??? */ |
d02b48c6 RE |
1807 | &ok); |
1808 | ||
1809 | if (!ok) return((int)n); | |
48948d53 | 1810 | p=(unsigned char *)s->init_msg; |
d02b48c6 | 1811 | |
52b8dad8 | 1812 | alg_k=s->s3->tmp.new_cipher->algorithm_mkey; |
d02b48c6 | 1813 | |
bc36ee62 | 1814 | #ifndef OPENSSL_NO_RSA |
52b8dad8 | 1815 | if (alg_k & SSL_kRSA) |
d02b48c6 RE |
1816 | { |
1817 | /* FIX THIS UP EAY EAY EAY EAY */ | |
1818 | if (s->s3->tmp.use_rsa_tmp) | |
1819 | { | |
b56bce4f | 1820 | if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL)) |
ca8e5b9b | 1821 | rsa=s->cert->rsa_tmp; |
d02b48c6 RE |
1822 | /* Don't do a callback because rsa_tmp should |
1823 | * be sent already */ | |
1824 | if (rsa == NULL) | |
1825 | { | |
58964a49 | 1826 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1827 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY); |
1828 | goto f_err; | |
1829 | ||
1830 | } | |
1831 | } | |
1832 | else | |
1833 | { | |
1834 | pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey; | |
1835 | if ( (pkey == NULL) || | |
1836 | (pkey->type != EVP_PKEY_RSA) || | |
1837 | (pkey->pkey.rsa == NULL)) | |
1838 | { | |
58964a49 | 1839 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1840 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE); |
1841 | goto f_err; | |
1842 | } | |
1843 | rsa=pkey->pkey.rsa; | |
1844 | } | |
1845 | ||
7432d073 | 1846 | /* TLS and [incidentally] DTLS{0xFEFF} */ |
58964a49 RE |
1847 | if (s->version > SSL3_VERSION) |
1848 | { | |
1849 | n2s(p,i); | |
1850 | if (n != i+2) | |
1851 | { | |
1852 | if (!(s->options & SSL_OP_TLS_D5_BUG)) | |
1853 | { | |
1854 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG); | |
1855 | goto err; | |
1856 | } | |
1857 | else | |
1858 | p-=2; | |
1859 | } | |
1860 | else | |
1861 | n=i; | |
1862 | } | |
1863 | ||
d02b48c6 | 1864 | i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING); |
58964a49 | 1865 | |
31bc51c8 BM |
1866 | al = -1; |
1867 | ||
d02b48c6 RE |
1868 | if (i != SSL_MAX_MASTER_KEY_LENGTH) |
1869 | { | |
1870 | al=SSL_AD_DECODE_ERROR; | |
02da5bcd | 1871 | /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); */ |
d02b48c6 RE |
1872 | } |
1873 | ||
31bc51c8 | 1874 | if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff)))) |
d02b48c6 | 1875 | { |
2c05c494 BM |
1876 | /* The premaster secret must contain the same version number as the |
1877 | * ClientHello to detect version rollback attacks (strangely, the | |
1878 | * protocol does not offer such protection for DH ciphersuites). | |
1879 | * However, buggy clients exist that send the negotiated protocol | |
93d8bfcd | 1880 | * version instead if the server does not support the requested |
2c05c494 BM |
1881 | * protocol version. |
1882 | * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */ | |
1883 | if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) && | |
1884 | (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff)))) | |
1885 | { | |
1886 | al=SSL_AD_DECODE_ERROR; | |
02da5bcd BM |
1887 | /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER); */ |
1888 | ||
1889 | /* The Klima-Pokorny-Rosa extension of Bleichenbacher's attack | |
1890 | * (http://eprint.iacr.org/2003/052/) exploits the version | |
1891 | * number check as a "bad version oracle" -- an alert would | |
1892 | * reveal that the plaintext corresponding to some ciphertext | |
1893 | * made up by the adversary is properly formatted except | |
1894 | * that the version number is wrong. To avoid such attacks, | |
1895 | * we should treat this just like any other decryption error. */ | |
2c05c494 | 1896 | } |
d02b48c6 | 1897 | } |
d02b48c6 | 1898 | |
31bc51c8 BM |
1899 | if (al != -1) |
1900 | { | |
31bc51c8 BM |
1901 | /* Some decryption failure -- use random value instead as countermeasure |
1902 | * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding | |
02da5bcd | 1903 | * (see RFC 2246, section 7.4.7.1). */ |
31bc51c8 BM |
1904 | ERR_clear_error(); |
1905 | i = SSL_MAX_MASTER_KEY_LENGTH; | |
1906 | p[0] = s->client_version >> 8; | |
1907 | p[1] = s->client_version & 0xff; | |
7c7667b8 NL |
1908 | if (RAND_pseudo_bytes(p+2, i-2) <= 0) /* should be RAND_bytes, but we cannot work around a failure */ |
1909 | goto err; | |
31bc51c8 BM |
1910 | } |
1911 | ||
d02b48c6 | 1912 | s->session->master_key_length= |
58964a49 | 1913 | s->method->ssl3_enc->generate_master_secret(s, |
d02b48c6 RE |
1914 | s->session->master_key, |
1915 | p,i); | |
43d60164 | 1916 | OPENSSL_cleanse(p,i); |
d02b48c6 RE |
1917 | } |
1918 | else | |
4c5fac4a | 1919 | #endif |
bc36ee62 | 1920 | #ifndef OPENSSL_NO_DH |
52b8dad8 | 1921 | if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) |
d02b48c6 | 1922 | { |
d02b48c6 RE |
1923 | n2s(p,i); |
1924 | if (n != i+2) | |
1925 | { | |
58964a49 | 1926 | if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG)) |
d02b48c6 RE |
1927 | { |
1928 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG); | |
1929 | goto err; | |
1930 | } | |
1931 | else | |
1932 | { | |
1933 | p-=2; | |
1934 | i=(int)n; | |
1935 | } | |
1936 | } | |
1937 | ||
1938 | if (n == 0L) /* the parameters are in the cert */ | |
1939 | { | |
58964a49 | 1940 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1941 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS); |
1942 | goto f_err; | |
1943 | } | |
1944 | else | |
1945 | { | |
1946 | if (s->s3->tmp.dh == NULL) | |
1947 | { | |
58964a49 | 1948 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1949 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
1950 | goto f_err; | |
1951 | } | |
1952 | else | |
1953 | dh_srvr=s->s3->tmp.dh; | |
1954 | } | |
1955 | ||
1956 | pub=BN_bin2bn(p,i,NULL); | |
1957 | if (pub == NULL) | |
1958 | { | |
1959 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB); | |
1960 | goto err; | |
1961 | } | |
58964a49 | 1962 | |
d02b48c6 RE |
1963 | i=DH_compute_key(p,pub,dh_srvr); |
1964 | ||
1965 | if (i <= 0) | |
1966 | { | |
1967 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1968 | goto err; | |
1969 | } | |
1970 | ||
1971 | DH_free(s->s3->tmp.dh); | |
1972 | s->s3->tmp.dh=NULL; | |
1973 | ||
1974 | BN_clear_free(pub); | |
1975 | pub=NULL; | |
1976 | s->session->master_key_length= | |
58964a49 | 1977 | s->method->ssl3_enc->generate_master_secret(s, |
d02b48c6 | 1978 | s->session->master_key,p,i); |
43d60164 | 1979 | OPENSSL_cleanse(p,i); |
d02b48c6 RE |
1980 | } |
1981 | else | |
1982 | #endif | |
bc36ee62 | 1983 | #ifndef OPENSSL_NO_KRB5 |
52b8dad8 BM |
1984 | if (alg_k & SSL_kKRB5) |
1985 | { | |
1986 | krb5_error_code krb5rc; | |
2a1ef754 RL |
1987 | krb5_data enc_ticket; |
1988 | krb5_data authenticator; | |
1989 | krb5_data enc_pms; | |
52b8dad8 | 1990 | KSSL_CTX *kssl_ctx = s->kssl_ctx; |
2a1ef754 RL |
1991 | EVP_CIPHER_CTX ciph_ctx; |
1992 | EVP_CIPHER *enc = NULL; | |
1993 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
acdf4afb | 1994 | unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH |
52b8dad8 BM |
1995 | + EVP_MAX_BLOCK_LENGTH]; |
1996 | int padl, outl; | |
2a1ef754 RL |
1997 | krb5_timestamp authtime = 0; |
1998 | krb5_ticket_times ttimes; | |
f9b3bff6 | 1999 | |
de941e28 DSH |
2000 | EVP_CIPHER_CTX_init(&ciph_ctx); |
2001 | ||
52b8dad8 | 2002 | if (!kssl_ctx) kssl_ctx = kssl_ctx_new(); |
2a1ef754 RL |
2003 | |
2004 | n2s(p,i); | |
2005 | enc_ticket.length = i; | |
9e5790ce NL |
2006 | |
2007 | if (n < enc_ticket.length + 6) | |
2008 | { | |
2009 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2010 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2011 | goto err; | |
2012 | } | |
2013 | ||
0b4c91c0 | 2014 | enc_ticket.data = (char *)p; |
2a1ef754 RL |
2015 | p+=enc_ticket.length; |
2016 | ||
2017 | n2s(p,i); | |
2018 | authenticator.length = i; | |
9e5790ce NL |
2019 | |
2020 | if (n < enc_ticket.length + authenticator.length + 6) | |
2021 | { | |
2022 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2023 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2024 | goto err; | |
2025 | } | |
2026 | ||
0b4c91c0 | 2027 | authenticator.data = (char *)p; |
2a1ef754 RL |
2028 | p+=authenticator.length; |
2029 | ||
2030 | n2s(p,i); | |
2031 | enc_pms.length = i; | |
0b4c91c0 | 2032 | enc_pms.data = (char *)p; |
2a1ef754 RL |
2033 | p+=enc_pms.length; |
2034 | ||
c046fffa LJ |
2035 | /* Note that the length is checked again below, |
2036 | ** after decryption | |
2037 | */ | |
dd7ab82e | 2038 | if(enc_pms.length > sizeof pms) |
c046fffa LJ |
2039 | { |
2040 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2041 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2042 | goto err; | |
2043 | } | |
2044 | ||
0858b71b DSH |
2045 | if (n != (long)(enc_ticket.length + authenticator.length + |
2046 | enc_pms.length + 6)) | |
2a1ef754 RL |
2047 | { |
2048 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2049 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2050 | goto err; | |
2051 | } | |
2052 | ||
52b8dad8 | 2053 | if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes, |
2a1ef754 | 2054 | &kssl_err)) != 0) |
52b8dad8 | 2055 | { |
f9b3bff6 | 2056 | #ifdef KSSL_DEBUG |
52b8dad8 BM |
2057 | printf("kssl_sget_tkt rtn %d [%d]\n", |
2058 | krb5rc, kssl_err.reason); | |
2059 | if (kssl_err.text) | |
2060 | printf("kssl_err text= %s\n", kssl_err.text); | |
f9b3bff6 | 2061 | #endif /* KSSL_DEBUG */ |
52b8dad8 BM |
2062 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2063 | kssl_err.reason); | |
2064 | goto err; | |
2065 | } | |
f9b3bff6 | 2066 | |
2a1ef754 RL |
2067 | /* Note: no authenticator is not considered an error, |
2068 | ** but will return authtime == 0. | |
2069 | */ | |
2070 | if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator, | |
2071 | &authtime, &kssl_err)) != 0) | |
2072 | { | |
2073 | #ifdef KSSL_DEBUG | |
52b8dad8 BM |
2074 | printf("kssl_check_authent rtn %d [%d]\n", |
2075 | krb5rc, kssl_err.reason); | |
2076 | if (kssl_err.text) | |
2077 | printf("kssl_err text= %s\n", kssl_err.text); | |
2a1ef754 | 2078 | #endif /* KSSL_DEBUG */ |
52b8dad8 BM |
2079 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2080 | kssl_err.reason); | |
2081 | goto err; | |
2a1ef754 RL |
2082 | } |
2083 | ||
2084 | if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0) | |
2085 | { | |
aa4ce731 | 2086 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, krb5rc); |
52b8dad8 | 2087 | goto err; |
2a1ef754 RL |
2088 | } |
2089 | ||
f9b3bff6 | 2090 | #ifdef KSSL_DEBUG |
52b8dad8 | 2091 | kssl_ctx_show(kssl_ctx); |
f9b3bff6 RL |
2092 | #endif /* KSSL_DEBUG */ |
2093 | ||
2a1ef754 | 2094 | enc = kssl_map_enc(kssl_ctx->enctype); |
52b8dad8 BM |
2095 | if (enc == NULL) |
2096 | goto err; | |
882e8912 | 2097 | |
54a656ef | 2098 | memset(iv, 0, sizeof iv); /* per RFC 1510 */ |
2a1ef754 | 2099 | |
db6a87d8 | 2100 | if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv)) |
acdf4afb RL |
2101 | { |
2102 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2103 | SSL_R_DECRYPTION_FAILED); | |
2104 | goto err; | |
2105 | } | |
2106 | if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl, | |
0b4c91c0 | 2107 | (unsigned char *)enc_pms.data, enc_pms.length)) |
acdf4afb RL |
2108 | { |
2109 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2110 | SSL_R_DECRYPTION_FAILED); | |
2111 | goto err; | |
2112 | } | |
2a1ef754 RL |
2113 | if (outl > SSL_MAX_MASTER_KEY_LENGTH) |
2114 | { | |
2115 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2116 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2117 | goto err; | |
2118 | } | |
581f1c84 | 2119 | if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl)) |
acdf4afb RL |
2120 | { |
2121 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2122 | SSL_R_DECRYPTION_FAILED); | |
2123 | goto err; | |
2124 | } | |
2a1ef754 RL |
2125 | outl += padl; |
2126 | if (outl > SSL_MAX_MASTER_KEY_LENGTH) | |
2127 | { | |
2128 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2129 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2130 | goto err; | |
2131 | } | |
cbb92dfa RL |
2132 | if (!((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff)))) |
2133 | { | |
2134 | /* The premaster secret must contain the same version number as the | |
2135 | * ClientHello to detect version rollback attacks (strangely, the | |
2136 | * protocol does not offer such protection for DH ciphersuites). | |
2137 | * However, buggy clients exist that send random bytes instead of | |
2138 | * the protocol version. | |
2139 | * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. | |
2140 | * (Perhaps we should have a separate BUG value for the Kerberos cipher) | |
2141 | */ | |
2142 | if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) && | |
2143 | (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff)))) | |
52b8dad8 | 2144 | { |
cbb92dfa RL |
2145 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2146 | SSL_AD_DECODE_ERROR); | |
2147 | goto err; | |
2148 | } | |
2149 | } | |
2150 | ||
2a1ef754 RL |
2151 | EVP_CIPHER_CTX_cleanup(&ciph_ctx); |
2152 | ||
52b8dad8 BM |
2153 | s->session->master_key_length= |
2154 | s->method->ssl3_enc->generate_master_secret(s, | |
2155 | s->session->master_key, pms, outl); | |
2a1ef754 | 2156 | |
52b8dad8 BM |
2157 | if (kssl_ctx->client_princ) |
2158 | { | |
2159 | size_t len = strlen(kssl_ctx->client_princ); | |
2160 | if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH ) | |
2161 | { | |
2162 | s->session->krb5_client_princ_len = len; | |
2163 | memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len); | |
2164 | } | |
2165 | } | |
882e8912 RL |
2166 | |
2167 | ||
52b8dad8 | 2168 | /* Was doing kssl_ctx_free() here, |
2a1ef754 | 2169 | ** but it caused problems for apache. |
52b8dad8 BM |
2170 | ** kssl_ctx = kssl_ctx_free(kssl_ctx); |
2171 | ** if (s->kssl_ctx) s->kssl_ctx = NULL; | |
2172 | */ | |
2173 | } | |
f9b3bff6 | 2174 | else |
bc36ee62 | 2175 | #endif /* OPENSSL_NO_KRB5 */ |
ea262260 BM |
2176 | |
2177 | #ifndef OPENSSL_NO_ECDH | |
52b8dad8 | 2178 | if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) |
ea262260 BM |
2179 | { |
2180 | int ret = 1; | |
968766ca | 2181 | int field_size = 0; |
9dd84053 NL |
2182 | const EC_KEY *tkey; |
2183 | const EC_GROUP *group; | |
2184 | const BIGNUM *priv_key; | |
ea262260 | 2185 | |
52b8dad8 | 2186 | /* initialize structures for server's ECDH key pair */ |
ea262260 BM |
2187 | if ((srvr_ecdh = EC_KEY_new()) == NULL) |
2188 | { | |
52b8dad8 | 2189 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
ea262260 | 2190 | ERR_R_MALLOC_FAILURE); |
52b8dad8 | 2191 | goto err; |
ea262260 BM |
2192 | } |
2193 | ||
2194 | /* Let's get server private key and group information */ | |
52b8dad8 | 2195 | if (alg_k & (SSL_kECDHr|SSL_kECDHe)) |
ea262260 | 2196 | { |
52b8dad8 | 2197 | /* use the certificate */ |
feaaf1db | 2198 | tkey = s->cert->pkeys[SSL_PKEY_ECC].privatekey->pkey.ec; |
ea262260 BM |
2199 | } |
2200 | else | |
2201 | { | |
2202 | /* use the ephermeral values we saved when | |
2203 | * generating the ServerKeyExchange msg. | |
2204 | */ | |
9dd84053 NL |
2205 | tkey = s->s3->tmp.ecdh; |
2206 | } | |
2207 | ||
2208 | group = EC_KEY_get0_group(tkey); | |
2209 | priv_key = EC_KEY_get0_private_key(tkey); | |
2210 | ||
2211 | if (!EC_KEY_set_group(srvr_ecdh, group) || | |
2212 | !EC_KEY_set_private_key(srvr_ecdh, priv_key)) | |
2213 | { | |
2214 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2215 | ERR_R_EC_LIB); | |
2216 | goto err; | |
ea262260 BM |
2217 | } |
2218 | ||
2219 | /* Let's get client's public key */ | |
9dd84053 | 2220 | if ((clnt_ecpoint = EC_POINT_new(group)) == NULL) |
ea262260 BM |
2221 | { |
2222 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2223 | ERR_R_MALLOC_FAILURE); | |
2224 | goto err; | |
2225 | } | |
2226 | ||
52b8dad8 BM |
2227 | if (n == 0L) |
2228 | { | |
ea262260 BM |
2229 | /* Client Publickey was in Client Certificate */ |
2230 | ||
52b8dad8 | 2231 | if (alg_k & SSL_kEECDH) |
ea262260 BM |
2232 | { |
2233 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2234 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); | |
2235 | goto f_err; | |
2236 | } | |
52b8dad8 | 2237 | if (((clnt_pub_pkey=X509_get_pubkey(s->session->peer)) |
ea262260 | 2238 | == NULL) || |
5488bb61 | 2239 | (clnt_pub_pkey->type != EVP_PKEY_EC)) |
52b8dad8 | 2240 | { |
ea262260 BM |
2241 | /* XXX: For now, we do not support client |
2242 | * authentication using ECDH certificates | |
2243 | * so this branch (n == 0L) of the code is | |
2244 | * never executed. When that support is | |
2245 | * added, we ought to ensure the key | |
2246 | * received in the certificate is | |
2247 | * authorized for key agreement. | |
2248 | * ECDH_compute_key implicitly checks that | |
2249 | * the two ECDH shares are for the same | |
2250 | * group. | |
2251 | */ | |
52b8dad8 BM |
2252 | al=SSL_AD_HANDSHAKE_FAILURE; |
2253 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
ea262260 | 2254 | SSL_R_UNABLE_TO_DECODE_ECDH_CERTS); |
52b8dad8 BM |
2255 | goto f_err; |
2256 | } | |
ea262260 | 2257 | |
8c5a2bd6 NL |
2258 | if (EC_POINT_copy(clnt_ecpoint, |
2259 | EC_KEY_get0_public_key(clnt_pub_pkey->pkey.ec)) == 0) | |
2260 | { | |
2261 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2262 | ERR_R_EC_LIB); | |
2263 | goto err; | |
2264 | } | |
52b8dad8 BM |
2265 | ret = 2; /* Skip certificate verify processing */ |
2266 | } | |
2267 | else | |
2268 | { | |
ea262260 BM |
2269 | /* Get client's public key from encoded point |
2270 | * in the ClientKeyExchange message. | |
2271 | */ | |
2272 | if ((bn_ctx = BN_CTX_new()) == NULL) | |
2273 | { | |
2274 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2275 | ERR_R_MALLOC_FAILURE); | |
2276 | goto err; | |
2277 | } | |
2278 | ||
52b8dad8 BM |
2279 | /* Get encoded point length */ |
2280 | i = *p; | |
ea262260 | 2281 | p += 1; |
52b8dad8 | 2282 | if (EC_POINT_oct2point(group, |
ea262260 BM |
2283 | clnt_ecpoint, p, i, bn_ctx) == 0) |
2284 | { | |
2285 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2286 | ERR_R_EC_LIB); | |
2287 | goto err; | |
2288 | } | |
52b8dad8 BM |
2289 | /* p is pointing to somewhere in the buffer |
2290 | * currently, so set it to the start | |
2291 | */ | |
2292 | p=(unsigned char *)s->init_buf->data; | |
2293 | } | |
ea262260 BM |
2294 | |
2295 | /* Compute the shared pre-master secret */ | |
9dd84053 | 2296 | field_size = EC_GROUP_get_degree(group); |
968766ca BM |
2297 | if (field_size <= 0) |
2298 | { | |
2299 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2300 | ERR_R_ECDH_LIB); | |
2301 | goto err; | |
2302 | } | |
d56349a2 | 2303 | i = ECDH_compute_key(p, (field_size+7)/8, clnt_ecpoint, srvr_ecdh, NULL); |
52b8dad8 BM |
2304 | if (i <= 0) |
2305 | { | |
2306 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
ea262260 | 2307 | ERR_R_ECDH_LIB); |
52b8dad8 BM |
2308 | goto err; |
2309 | } | |
ea262260 BM |
2310 | |
2311 | EVP_PKEY_free(clnt_pub_pkey); | |
2312 | EC_POINT_free(clnt_ecpoint); | |
2313 | if (srvr_ecdh != NULL) | |
ea262260 | 2314 | EC_KEY_free(srvr_ecdh); |
ea262260 BM |
2315 | BN_CTX_free(bn_ctx); |
2316 | ||
2317 | /* Compute the master secret */ | |
52b8dad8 | 2318 | s->session->master_key_length = s->method->ssl3_enc-> \ |
ea262260 BM |
2319 | generate_master_secret(s, s->session->master_key, p, i); |
2320 | ||
52b8dad8 BM |
2321 | OPENSSL_cleanse(p, i); |
2322 | return (ret); | |
ea262260 BM |
2323 | } |
2324 | else | |
ddac1974 NL |
2325 | #endif |
2326 | #ifndef OPENSSL_NO_PSK | |
52b8dad8 | 2327 | if (alg_k & SSL_kPSK) |
ddac1974 NL |
2328 | { |
2329 | unsigned char *t = NULL; | |
2330 | unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; | |
2331 | unsigned int pre_ms_len = 0, psk_len = 0; | |
2332 | int psk_err = 1; | |
2333 | char tmp_id[PSK_MAX_IDENTITY_LEN+1]; | |
2334 | ||
2335 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2336 | ||
2337 | n2s(p,i); | |
2338 | if (n != i+2) | |
2339 | { | |
2340 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2341 | SSL_R_LENGTH_MISMATCH); | |
2342 | goto psk_err; | |
2343 | } | |
2344 | if (i > PSK_MAX_IDENTITY_LEN) | |
2345 | { | |
2346 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2347 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2348 | goto psk_err; | |
2349 | } | |
2350 | if (s->psk_server_callback == NULL) | |
2351 | { | |
2352 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2353 | SSL_R_PSK_NO_SERVER_CB); | |
2354 | goto psk_err; | |
2355 | } | |
2356 | ||
2357 | /* Create guaranteed NULL-terminated identity | |
2358 | * string for the callback */ | |
2359 | memcpy(tmp_id, p, i); | |
2360 | memset(tmp_id+i, 0, PSK_MAX_IDENTITY_LEN+1-i); | |
2361 | psk_len = s->psk_server_callback(s, tmp_id, | |
2362 | psk_or_pre_ms, sizeof(psk_or_pre_ms)); | |
2363 | OPENSSL_cleanse(tmp_id, PSK_MAX_IDENTITY_LEN+1); | |
2364 | ||
2365 | if (psk_len > PSK_MAX_PSK_LEN) | |
2366 | { | |
2367 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2368 | ERR_R_INTERNAL_ERROR); | |
2369 | goto psk_err; | |
2370 | } | |
2371 | else if (psk_len == 0) | |
2372 | { | |
2373 | /* PSK related to the given identity not found */ | |
2374 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2375 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
2376 | al=SSL_AD_UNKNOWN_PSK_IDENTITY; | |
2377 | goto psk_err; | |
2378 | } | |
2379 | ||
2380 | /* create PSK pre_master_secret */ | |
2381 | pre_ms_len=2+psk_len+2+psk_len; | |
2382 | t = psk_or_pre_ms; | |
2383 | memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); | |
2384 | s2n(psk_len, t); | |
2385 | memset(t, 0, psk_len); | |
2386 | t+=psk_len; | |
2387 | s2n(psk_len, t); | |
2388 | ||
2389 | if (s->session->psk_identity != NULL) | |
2390 | OPENSSL_free(s->session->psk_identity); | |
07ef6129 | 2391 | s->session->psk_identity = BUF_strdup((char *)p); |
ddac1974 NL |
2392 | if (s->session->psk_identity == NULL) |
2393 | { | |
2394 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2395 | ERR_R_MALLOC_FAILURE); | |
2396 | goto psk_err; | |
2397 | } | |
2398 | ||
2399 | if (s->session->psk_identity_hint != NULL) | |
2400 | OPENSSL_free(s->session->psk_identity_hint); | |
2401 | s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); | |
2402 | if (s->ctx->psk_identity_hint != NULL && | |
2403 | s->session->psk_identity_hint == NULL) | |
2404 | { | |
2405 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2406 | ERR_R_MALLOC_FAILURE); | |
2407 | goto psk_err; | |
2408 | } | |
2409 | ||
2410 | s->session->master_key_length= | |
2411 | s->method->ssl3_enc->generate_master_secret(s, | |
2412 | s->session->master_key, psk_or_pre_ms, pre_ms_len); | |
2413 | psk_err = 0; | |
2414 | psk_err: | |
2415 | OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); | |
52b8dad8 BM |
2416 | if (psk_err != 0) |
2417 | goto f_err; | |
ddac1974 NL |
2418 | } |
2419 | else | |
ea262260 | 2420 | #endif |
0e1dba93 DSH |
2421 | if (alg_k & SSL_kGOST) |
2422 | { | |
2423 | EVP_PKEY_CTX *pkey_ctx; | |
2424 | unsigned char premaster_secret[32]; | |
2425 | size_t outlen; | |
2426 | ||
2427 | /* Get our certificate privatec key*/ | |
2428 | pkey_ctx = EVP_PKEY_CTX_new(s->cert->key->privatekey,NULL); | |
2429 | EVP_PKEY_decrypt_init(pkey_ctx); | |
2430 | /* Decrypt session key */ | |
2431 | if ((*p!=( V_ASN1_SEQUENCE| V_ASN1_CONSTRUCTED)) || p[1]!=0x81 ) | |
2432 | { | |
2433 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED); | |
2434 | goto err; | |
2435 | } | |
2436 | if (EVP_PKEY_decrypt(pkey_ctx,premaster_secret,&outlen,p+3,p[2]) <0) | |
2437 | ||
2438 | { | |
2439 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED); | |
2440 | goto err; | |
2441 | } | |
2442 | /* Generate master secret */ | |
2443 | EVP_PKEY_CTX_free(pkey_ctx); | |
2444 | s->session->master_key_length= | |
2445 | s->method->ssl3_enc->generate_master_secret(s, | |
2446 | s->session->master_key,premaster_secret,32); | |
2447 | ||
2448 | } | |
2449 | else | |
d02b48c6 | 2450 | { |
58964a49 | 2451 | al=SSL_AD_HANDSHAKE_FAILURE; |
2a1ef754 RL |
2452 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2453 | SSL_R_UNKNOWN_CIPHER_TYPE); | |
d02b48c6 RE |
2454 | goto f_err; |
2455 | } | |
2456 | ||
2457 | return(1); | |
2458 | f_err: | |
2459 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
ea262260 | 2460 | #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_ECDH) |
d02b48c6 | 2461 | err: |
ea262260 | 2462 | #endif |
d020e701 | 2463 | #ifndef OPENSSL_NO_ECDH |
ea262260 BM |
2464 | EVP_PKEY_free(clnt_pub_pkey); |
2465 | EC_POINT_free(clnt_ecpoint); | |
2466 | if (srvr_ecdh != NULL) | |
ea262260 | 2467 | EC_KEY_free(srvr_ecdh); |
ea262260 | 2468 | BN_CTX_free(bn_ctx); |
58964a49 | 2469 | #endif |
d02b48c6 RE |
2470 | return(-1); |
2471 | } | |
2472 | ||
36d16f8e | 2473 | int ssl3_get_cert_verify(SSL *s) |
d02b48c6 RE |
2474 | { |
2475 | EVP_PKEY *pkey=NULL; | |
2476 | unsigned char *p; | |
2477 | int al,ok,ret=0; | |
2478 | long n; | |
2479 | int type=0,i,j; | |
2480 | X509 *peer; | |
2481 | ||
36d16f8e | 2482 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
2483 | SSL3_ST_SR_CERT_VRFY_A, |
2484 | SSL3_ST_SR_CERT_VRFY_B, | |
2485 | -1, | |
00a357ab | 2486 | 514, /* 514? */ |
d02b48c6 RE |
2487 | &ok); |
2488 | ||
2489 | if (!ok) return((int)n); | |
2490 | ||
2491 | if (s->session->peer != NULL) | |
2492 | { | |
2493 | peer=s->session->peer; | |
2494 | pkey=X509_get_pubkey(peer); | |
2495 | type=X509_certificate_type(peer,pkey); | |
2496 | } | |
2497 | else | |
2498 | { | |
2499 | peer=NULL; | |
2500 | pkey=NULL; | |
2501 | } | |
2502 | ||
2503 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY) | |
2504 | { | |
2505 | s->s3->tmp.reuse_message=1; | |
2506 | if ((peer != NULL) && (type | EVP_PKT_SIGN)) | |
2507 | { | |
58964a49 | 2508 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 | 2509 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE); |
d02b48c6 RE |
2510 | goto f_err; |
2511 | } | |
2512 | ret=1; | |
2513 | goto end; | |
2514 | } | |
2515 | ||
2516 | if (peer == NULL) | |
2517 | { | |
2518 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED); | |
58964a49 | 2519 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
2520 | goto f_err; |
2521 | } | |
2522 | ||
2523 | if (!(type & EVP_PKT_SIGN)) | |
2524 | { | |
2525 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE); | |
58964a49 | 2526 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
2527 | goto f_err; |
2528 | } | |
2529 | ||
2530 | if (s->s3->change_cipher_spec) | |
2531 | { | |
2532 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY); | |
58964a49 | 2533 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
2534 | goto f_err; |
2535 | } | |
2536 | ||
2537 | /* we now have a signature that we need to verify */ | |
48948d53 | 2538 | p=(unsigned char *)s->init_msg; |
0e1dba93 DSH |
2539 | /* Check for broken implementations of GOST ciphersuites */ |
2540 | /* If key is GOST and n is exactly 64, it is bare | |
2541 | * signature without length field */ | |
2542 | if (n==64 && (pkey->type==NID_id_GostR3410_94 || | |
2543 | pkey->type == NID_id_GostR3410_2001) ) | |
d02b48c6 | 2544 | { |
0e1dba93 DSH |
2545 | i=64; |
2546 | } | |
2547 | else | |
2548 | { | |
2549 | n2s(p,i); | |
2550 | n-=2; | |
2551 | if (i > n) | |
2552 | { | |
2553 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH); | |
2554 | al=SSL_AD_DECODE_ERROR; | |
2555 | goto f_err; | |
2556 | } | |
2557 | } | |
d02b48c6 RE |
2558 | j=EVP_PKEY_size(pkey); |
2559 | if ((i > j) || (n > j) || (n <= 0)) | |
2560 | { | |
2561 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE); | |
58964a49 | 2562 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
2563 | goto f_err; |
2564 | } | |
2565 | ||
bc36ee62 | 2566 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
2567 | if (pkey->type == EVP_PKEY_RSA) |
2568 | { | |
f2d9a32c | 2569 | i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md, |
1c80019a DSH |
2570 | MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i, |
2571 | pkey->pkey.rsa); | |
d02b48c6 RE |
2572 | if (i < 0) |
2573 | { | |
58964a49 | 2574 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
2575 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT); |
2576 | goto f_err; | |
2577 | } | |
1c80019a | 2578 | if (i == 0) |
d02b48c6 | 2579 | { |
58964a49 | 2580 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
2581 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE); |
2582 | goto f_err; | |
2583 | } | |
2584 | } | |
2585 | else | |
2586 | #endif | |
bc36ee62 | 2587 | #ifndef OPENSSL_NO_DSA |
d02b48c6 RE |
2588 | if (pkey->type == EVP_PKEY_DSA) |
2589 | { | |
58964a49 | 2590 | j=DSA_verify(pkey->save_type, |
f2d9a32c | 2591 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]), |
d02b48c6 RE |
2592 | SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa); |
2593 | if (j <= 0) | |
2594 | { | |
2595 | /* bad signature */ | |
58964a49 | 2596 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
2597 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE); |
2598 | goto f_err; | |
2599 | } | |
2600 | } | |
2601 | else | |
ea262260 BM |
2602 | #endif |
2603 | #ifndef OPENSSL_NO_ECDSA | |
5488bb61 | 2604 | if (pkey->type == EVP_PKEY_EC) |
ea262260 BM |
2605 | { |
2606 | j=ECDSA_verify(pkey->save_type, | |
2607 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]), | |
9dd84053 | 2608 | SHA_DIGEST_LENGTH,p,i,pkey->pkey.ec); |
ea262260 BM |
2609 | if (j <= 0) |
2610 | { | |
2611 | /* bad signature */ | |
2612 | al=SSL_AD_DECRYPT_ERROR; | |
2613 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, | |
2614 | SSL_R_BAD_ECDSA_SIGNATURE); | |
2615 | goto f_err; | |
2616 | } | |
2617 | } | |
2618 | else | |
d02b48c6 | 2619 | #endif |
0e1dba93 DSH |
2620 | if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) |
2621 | { unsigned char signature[64]; | |
2622 | int idx; | |
2623 | EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new(pkey,NULL); | |
2624 | EVP_PKEY_verify_init(pctx); | |
2625 | if (i!=64) { | |
2626 | fprintf(stderr,"GOST signature length is %d",i); | |
2627 | } | |
2628 | for (idx=0;idx<64;idx++) { | |
2629 | signature[63-idx]=p[idx]; | |
2630 | } | |
2631 | j=EVP_PKEY_verify(pctx,signature,64,s->s3->tmp.cert_verify_md,32); | |
2632 | EVP_PKEY_CTX_free(pctx); | |
2633 | if (j<=0) | |
2634 | { | |
2635 | al=SSL_AD_DECRYPT_ERROR; | |
2636 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, | |
2637 | SSL_R_BAD_ECDSA_SIGNATURE); | |
2638 | goto f_err; | |
2639 | } | |
2640 | } | |
2641 | else | |
d02b48c6 | 2642 | { |
5277d7cb | 2643 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR); |
58964a49 | 2644 | al=SSL_AD_UNSUPPORTED_CERTIFICATE; |
d02b48c6 RE |
2645 | goto f_err; |
2646 | } | |
2647 | ||
2648 | ||
2649 | ret=1; | |
2650 | if (0) | |
2651 | { | |
2652 | f_err: | |
2653 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
2654 | } | |
2655 | end: | |
a8236c8c | 2656 | EVP_PKEY_free(pkey); |
d02b48c6 RE |
2657 | return(ret); |
2658 | } | |
2659 | ||
36d16f8e | 2660 | int ssl3_get_client_certificate(SSL *s) |
d02b48c6 RE |
2661 | { |
2662 | int i,ok,al,ret= -1; | |
2663 | X509 *x=NULL; | |
2664 | unsigned long l,nc,llen,n; | |
875a644a RL |
2665 | const unsigned char *p,*q; |
2666 | unsigned char *d; | |
f73e07cf | 2667 | STACK_OF(X509) *sk=NULL; |
d02b48c6 | 2668 | |
36d16f8e | 2669 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
2670 | SSL3_ST_SR_CERT_A, |
2671 | SSL3_ST_SR_CERT_B, | |
2672 | -1, | |
c0f5dd07 | 2673 | s->max_cert_list, |
d02b48c6 RE |
2674 | &ok); |
2675 | ||
2676 | if (!ok) return((int)n); | |
2677 | ||
2678 | if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE) | |
2679 | { | |
2680 | if ( (s->verify_mode & SSL_VERIFY_PEER) && | |
2681 | (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) | |
2682 | { | |
2683 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
58964a49 RE |
2684 | al=SSL_AD_HANDSHAKE_FAILURE; |
2685 | goto f_err; | |
2686 | } | |
47134b78 | 2687 | /* If tls asked for a client cert, the client must return a 0 list */ |
58964a49 RE |
2688 | if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request) |
2689 | { | |
2690 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST); | |
2691 | al=SSL_AD_UNEXPECTED_MESSAGE; | |
d02b48c6 RE |
2692 | goto f_err; |
2693 | } | |
2694 | s->s3->tmp.reuse_message=1; | |
2695 | return(1); | |
2696 | } | |
2697 | ||
2698 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) | |
2699 | { | |
58964a49 | 2700 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
2701 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE); |
2702 | goto f_err; | |
2703 | } | |
875a644a | 2704 | p=d=(unsigned char *)s->init_msg; |
d02b48c6 | 2705 | |
f73e07cf | 2706 | if ((sk=sk_X509_new_null()) == NULL) |
d02b48c6 RE |
2707 | { |
2708 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
2709 | goto err; | |
2710 | } | |
2711 | ||
2712 | n2l3(p,llen); | |
2713 | if (llen+3 != n) | |
2714 | { | |
58964a49 | 2715 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
2716 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH); |
2717 | goto f_err; | |
2718 | } | |
2719 | for (nc=0; nc<llen; ) | |
2720 | { | |
2721 | n2l3(p,l); | |
2722 | if ((l+nc+3) > llen) | |
2723 | { | |
58964a49 | 2724 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
2725 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); |
2726 | goto f_err; | |
2727 | } | |
2728 | ||
2729 | q=p; | |
2730 | x=d2i_X509(NULL,&p,l); | |
2731 | if (x == NULL) | |
2732 | { | |
2733 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB); | |
2734 | goto err; | |
2735 | } | |
2736 | if (p != (q+l)) | |
2737 | { | |
58964a49 | 2738 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
2739 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); |
2740 | goto f_err; | |
2741 | } | |
f73e07cf | 2742 | if (!sk_X509_push(sk,x)) |
d02b48c6 RE |
2743 | { |
2744 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
2745 | goto err; | |
2746 | } | |
2747 | x=NULL; | |
2748 | nc+=l+3; | |
2749 | } | |
2750 | ||
f73e07cf | 2751 | if (sk_X509_num(sk) <= 0) |
d02b48c6 | 2752 | { |
58964a49 RE |
2753 | /* TLS does not mind 0 certs returned */ |
2754 | if (s->version == SSL3_VERSION) | |
2755 | { | |
2756 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2757 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED); | |
2758 | goto f_err; | |
2759 | } | |
2760 | /* Fail for TLS only if we required a certificate */ | |
2761 | else if ((s->verify_mode & SSL_VERIFY_PEER) && | |
2762 | (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) | |
2763 | { | |
2764 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
2765 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2766 | goto f_err; | |
2767 | } | |
d02b48c6 | 2768 | } |
58964a49 | 2769 | else |
d02b48c6 | 2770 | { |
58964a49 RE |
2771 | i=ssl_verify_cert_chain(s,sk); |
2772 | if (!i) | |
2773 | { | |
2774 | al=ssl_verify_alarm_type(s->verify_result); | |
2775 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED); | |
2776 | goto f_err; | |
2777 | } | |
d02b48c6 RE |
2778 | } |
2779 | ||
b56bce4f | 2780 | if (s->session->peer != NULL) /* This should not be needed */ |
d02b48c6 | 2781 | X509_free(s->session->peer); |
f73e07cf | 2782 | s->session->peer=sk_X509_shift(sk); |
b1fe6ca1 | 2783 | s->session->verify_result = s->verify_result; |
8051996a | 2784 | |
b56bce4f BM |
2785 | /* With the current implementation, sess_cert will always be NULL |
2786 | * when we arrive here. */ | |
2787 | if (s->session->sess_cert == NULL) | |
2788 | { | |
2789 | s->session->sess_cert = ssl_sess_cert_new(); | |
2790 | if (s->session->sess_cert == NULL) | |
2791 | { | |
2792 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE); | |
2793 | goto err; | |
2794 | } | |
2795 | } | |
2796 | if (s->session->sess_cert->cert_chain != NULL) | |
2797 | sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free); | |
9d5cceac | 2798 | s->session->sess_cert->cert_chain=sk; |
98e04f9e BM |
2799 | /* Inconsistency alert: cert_chain does *not* include the |
2800 | * peer's own certificate, while we do include it in s3_clnt.c */ | |
8051996a | 2801 | |
b4cadc6e | 2802 | sk=NULL; |
d02b48c6 RE |
2803 | |
2804 | ret=1; | |
2805 | if (0) | |
2806 | { | |
2807 | f_err: | |
2808 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
2809 | } | |
2810 | err: | |
2811 | if (x != NULL) X509_free(x); | |
f73e07cf | 2812 | if (sk != NULL) sk_X509_pop_free(sk,X509_free); |
d02b48c6 RE |
2813 | return(ret); |
2814 | } | |
2815 | ||
6b691a5c | 2816 | int ssl3_send_server_certificate(SSL *s) |
d02b48c6 RE |
2817 | { |
2818 | unsigned long l; | |
2819 | X509 *x; | |
2820 | ||
2821 | if (s->state == SSL3_ST_SW_CERT_A) | |
2822 | { | |
2823 | x=ssl_get_server_send_cert(s); | |
52b8dad8 BM |
2824 | if (x == NULL) |
2825 | { | |
2826 | /* VRS: allow null cert if auth == KRB5 */ | |
2827 | if ((s->s3->tmp.new_cipher->algorithm_auth != SSL_aKRB5) || | |
2828 | (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5)) | |
2829 | { | |
2830 | SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR); | |
2831 | return(0); | |
2832 | } | |
d02b48c6 RE |
2833 | } |
2834 | ||
2835 | l=ssl3_output_cert_chain(s,x); | |
2836 | s->state=SSL3_ST_SW_CERT_B; | |
2837 | s->init_num=(int)l; | |
2838 | s->init_off=0; | |
2839 | } | |
2840 | ||
2841 | /* SSL3_ST_SW_CERT_B */ | |
2842 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
2843 | } | |
ddd3a617 | 2844 | #ifndef OPENSSL_NO_TLSEXT |
6434abbf DSH |
2845 | int ssl3_send_newsession_ticket(SSL *s) |
2846 | { | |
2847 | if (s->state == SSL3_ST_SW_SESSION_TICKET_A) | |
2848 | { | |
2849 | unsigned char *p, *senc, *macstart; | |
2850 | int len, slen; | |
2851 | unsigned int hlen; | |
2852 | EVP_CIPHER_CTX ctx; | |
2853 | HMAC_CTX hctx; | |
8a2062fe DSH |
2854 | unsigned char iv[EVP_MAX_IV_LENGTH]; |
2855 | unsigned char key_name[16]; | |
6434abbf DSH |
2856 | |
2857 | /* get session encoding length */ | |
2858 | slen = i2d_SSL_SESSION(s->session, NULL); | |
2859 | /* Some length values are 16 bits, so forget it if session is | |
2860 | * too long | |
2861 | */ | |
2862 | if (slen > 0xFF00) | |
2863 | return -1; | |
2864 | /* Grow buffer if need be: the length calculation is as | |
2865 | * follows 1 (size of message name) + 3 (message length | |
2866 | * bytes) + 4 (ticket lifetime hint) + 2 (ticket length) + | |
2867 | * 16 (key name) + max_iv_len (iv length) + | |
2868 | * session_length + max_enc_block_size (max encrypted session | |
2869 | * length) + max_md_size (HMAC). | |
2870 | */ | |
2871 | if (!BUF_MEM_grow(s->init_buf, | |
2872 | 26 + EVP_MAX_IV_LENGTH + EVP_MAX_BLOCK_LENGTH + | |
2873 | EVP_MAX_MD_SIZE + slen)) | |
2874 | return -1; | |
2875 | senc = OPENSSL_malloc(slen); | |
2876 | if (!senc) | |
2877 | return -1; | |
2878 | p = senc; | |
2879 | i2d_SSL_SESSION(s->session, &p); | |
2880 | ||
2881 | p=(unsigned char *)s->init_buf->data; | |
2882 | /* do the header */ | |
2883 | *(p++)=SSL3_MT_NEWSESSION_TICKET; | |
2884 | /* Skip message length for now */ | |
2885 | p += 3; | |
8a2062fe DSH |
2886 | EVP_CIPHER_CTX_init(&ctx); |
2887 | HMAC_CTX_init(&hctx); | |
2888 | /* Initialize HMAC and cipher contexts. If callback present | |
2889 | * it does all the work otherwise use generated values | |
2890 | * from parent ctx. | |
2891 | */ | |
2892 | if (s->ctx->tlsext_ticket_key_cb) | |
2893 | { | |
2894 | if (s->ctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx, | |
2895 | &hctx, 1) < 0) | |
2896 | { | |
2897 | OPENSSL_free(senc); | |
2898 | return -1; | |
2899 | } | |
2900 | } | |
2901 | else | |
2902 | { | |
2903 | RAND_pseudo_bytes(iv, 16); | |
2904 | EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL, | |
2905 | s->ctx->tlsext_tick_aes_key, iv); | |
2906 | HMAC_Init_ex(&hctx, s->ctx->tlsext_tick_hmac_key, 16, | |
2907 | tlsext_tick_md(), NULL); | |
2908 | memcpy(key_name, s->ctx->tlsext_tick_key_name, 16); | |
2909 | } | |
6434abbf DSH |
2910 | l2n(s->session->tlsext_tick_lifetime_hint, p); |
2911 | /* Skip ticket length for now */ | |
2912 | p += 2; | |
2913 | /* Output key name */ | |
2914 | macstart = p; | |
8a2062fe | 2915 | memcpy(p, key_name, 16); |
6434abbf | 2916 | p += 16; |
8a2062fe DSH |
2917 | /* output IV */ |
2918 | memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx)); | |
2919 | p += EVP_CIPHER_CTX_iv_length(&ctx); | |
6434abbf | 2920 | /* Encrypt session data */ |
6434abbf DSH |
2921 | EVP_EncryptUpdate(&ctx, p, &len, senc, slen); |
2922 | p += len; | |
2923 | EVP_EncryptFinal(&ctx, p, &len); | |
2924 | p += len; | |
2925 | EVP_CIPHER_CTX_cleanup(&ctx); | |
2926 | ||
6434abbf DSH |
2927 | HMAC_Update(&hctx, macstart, p - macstart); |
2928 | HMAC_Final(&hctx, p, &hlen); | |
2929 | HMAC_CTX_cleanup(&hctx); | |
2930 | ||
2931 | p += hlen; | |
2932 | /* Now write out lengths: p points to end of data written */ | |
2933 | /* Total length */ | |
2934 | len = p - (unsigned char *)s->init_buf->data; | |
2935 | p=(unsigned char *)s->init_buf->data + 1; | |
2936 | l2n3(len - 4, p); /* Message length */ | |
2937 | p += 4; | |
2938 | s2n(len - 10, p); /* Ticket length */ | |
2939 | ||
2940 | /* number of bytes to write */ | |
2941 | s->init_num= len; | |
2942 | s->state=SSL3_ST_SW_SESSION_TICKET_B; | |
2943 | s->init_off=0; | |
2944 | OPENSSL_free(senc); | |
2945 | } | |
2946 | ||
2947 | /* SSL3_ST_SW_SESSION_TICKET_B */ | |
2948 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
2949 | } | |
67c8e7f4 DSH |
2950 | |
2951 | int ssl3_send_cert_status(SSL *s) | |
2952 | { | |
2953 | if (s->state == SSL3_ST_SW_CERT_STATUS_A) | |
2954 | { | |
2955 | unsigned char *p; | |
2956 | /* Grow buffer if need be: the length calculation is as | |
2957 | * follows 1 (message type) + 3 (message length) + | |
2958 | * 1 (ocsp response type) + 3 (ocsp response length) | |
2959 | * + (ocsp response) | |
2960 | */ | |
2961 | if (!BUF_MEM_grow(s->init_buf, 8 + s->tlsext_ocsp_resplen)) | |
2962 | return -1; | |
2963 | ||
2964 | p=(unsigned char *)s->init_buf->data; | |
2965 | ||
2966 | /* do the header */ | |
2967 | *(p++)=SSL3_MT_CERTIFICATE_STATUS; | |
2968 | /* message length */ | |
2969 | l2n3(s->tlsext_ocsp_resplen + 4, p); | |
2970 | /* status type */ | |
2971 | *(p++)= s->tlsext_status_type; | |
2972 | /* length of OCSP response */ | |
2973 | l2n3(s->tlsext_ocsp_resplen, p); | |
2974 | /* actual response */ | |
2975 | memcpy(p, s->tlsext_ocsp_resp, s->tlsext_ocsp_resplen); | |
2976 | /* number of bytes to write */ | |
2977 | s->init_num = 8 + s->tlsext_ocsp_resplen; | |
2978 | s->state=SSL3_ST_SW_CERT_STATUS_B; | |
2979 | s->init_off = 0; | |
2980 | } | |
2981 | ||
2982 | /* SSL3_ST_SW_CERT_STATUS_B */ | |
2983 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
2984 | } | |
6434abbf | 2985 | #endif |