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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 | 533 | if (s->s3->handshake_buffer) |
6ba71a71 BL |
534 | if (!ssl3_digest_cached_records(s)) |
535 | return -1; | |
0e1dba93 DSH |
536 | for (dgst_num=0; dgst_num<SSL_MAX_DIGEST;dgst_num++) |
537 | if (s->s3->handshake_dgst[dgst_num]) | |
538 | { | |
539 | 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])); | |
540 | offset+=EVP_MD_CTX_size(s->s3->handshake_dgst[dgst_num]); | |
541 | } | |
ea262260 | 542 | } |
d02b48c6 RE |
543 | break; |
544 | ||
545 | case SSL3_ST_SR_CERT_VRFY_A: | |
546 | case SSL3_ST_SR_CERT_VRFY_B: | |
547 | ||
548 | /* we should decide if we expected this one */ | |
549 | ret=ssl3_get_cert_verify(s); | |
550 | if (ret <= 0) goto end; | |
551 | ||
552 | s->state=SSL3_ST_SR_FINISHED_A; | |
553 | s->init_num=0; | |
554 | break; | |
555 | ||
556 | case SSL3_ST_SR_FINISHED_A: | |
557 | case SSL3_ST_SR_FINISHED_B: | |
558 | ret=ssl3_get_finished(s,SSL3_ST_SR_FINISHED_A, | |
58964a49 | 559 | SSL3_ST_SR_FINISHED_B); |
d02b48c6 | 560 | if (ret <= 0) goto end; |
6434abbf | 561 | #ifndef OPENSSL_NO_TLSEXT |
d26c905c | 562 | if (s->tlsext_ticket_expected) |
6434abbf | 563 | s->state=SSL3_ST_SW_SESSION_TICKET_A; |
d26c905c DSH |
564 | else if (s->hit) |
565 | s->state=SSL_ST_OK; | |
566 | #else | |
567 | if (s->hit) | |
568 | s->state=SSL_ST_OK; | |
6434abbf | 569 | #endif |
d02b48c6 RE |
570 | else |
571 | s->state=SSL3_ST_SW_CHANGE_A; | |
572 | s->init_num=0; | |
573 | break; | |
574 | ||
6434abbf DSH |
575 | #ifndef OPENSSL_NO_TLSEXT |
576 | case SSL3_ST_SW_SESSION_TICKET_A: | |
577 | case SSL3_ST_SW_SESSION_TICKET_B: | |
578 | ret=ssl3_send_newsession_ticket(s); | |
579 | if (ret <= 0) goto end; | |
580 | s->state=SSL3_ST_SW_CHANGE_A; | |
581 | s->init_num=0; | |
582 | break; | |
583 | ||
67c8e7f4 DSH |
584 | case SSL3_ST_SW_CERT_STATUS_A: |
585 | case SSL3_ST_SW_CERT_STATUS_B: | |
586 | ret=ssl3_send_cert_status(s); | |
587 | if (ret <= 0) goto end; | |
588 | s->state=SSL3_ST_SW_KEY_EXCH_A; | |
589 | s->init_num=0; | |
590 | break; | |
591 | ||
6434abbf DSH |
592 | #endif |
593 | ||
d02b48c6 RE |
594 | case SSL3_ST_SW_CHANGE_A: |
595 | case SSL3_ST_SW_CHANGE_B: | |
596 | ||
597 | s->session->cipher=s->s3->tmp.new_cipher; | |
58964a49 RE |
598 | if (!s->method->ssl3_enc->setup_key_block(s)) |
599 | { ret= -1; goto end; } | |
d02b48c6 RE |
600 | |
601 | ret=ssl3_send_change_cipher_spec(s, | |
602 | SSL3_ST_SW_CHANGE_A,SSL3_ST_SW_CHANGE_B); | |
603 | ||
604 | if (ret <= 0) goto end; | |
605 | s->state=SSL3_ST_SW_FINISHED_A; | |
606 | s->init_num=0; | |
607 | ||
58964a49 | 608 | if (!s->method->ssl3_enc->change_cipher_state(s, |
d02b48c6 RE |
609 | SSL3_CHANGE_CIPHER_SERVER_WRITE)) |
610 | { | |
611 | ret= -1; | |
612 | goto end; | |
613 | } | |
614 | ||
615 | break; | |
616 | ||
617 | case SSL3_ST_SW_FINISHED_A: | |
618 | case SSL3_ST_SW_FINISHED_B: | |
619 | ret=ssl3_send_finished(s, | |
620 | SSL3_ST_SW_FINISHED_A,SSL3_ST_SW_FINISHED_B, | |
c44f7540 BM |
621 | s->method->ssl3_enc->server_finished_label, |
622 | s->method->ssl3_enc->server_finished_label_len); | |
d02b48c6 RE |
623 | if (ret <= 0) goto end; |
624 | s->state=SSL3_ST_SW_FLUSH; | |
625 | if (s->hit) | |
626 | s->s3->tmp.next_state=SSL3_ST_SR_FINISHED_A; | |
627 | else | |
628 | s->s3->tmp.next_state=SSL_ST_OK; | |
629 | s->init_num=0; | |
630 | break; | |
631 | ||
632 | case SSL_ST_OK: | |
633 | /* clean a few things up */ | |
634 | ssl3_cleanup_key_block(s); | |
635 | ||
636 | BUF_MEM_free(s->init_buf); | |
637 | s->init_buf=NULL; | |
638 | ||
639 | /* remove buffering on output */ | |
413c4f45 | 640 | ssl_free_wbio_buffer(s); |
d02b48c6 | 641 | |
d02b48c6 RE |
642 | s->init_num=0; |
643 | ||
8c74b5e5 | 644 | if (s->new_session == 2) /* skipped if we just sent a HelloRequest */ |
b49124f6 BM |
645 | { |
646 | /* actually not necessarily a 'new' session unless | |
647 | * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is set */ | |
648 | ||
649 | s->new_session=0; | |
650 | ||
651 | ssl_update_cache(s,SSL_SESS_CACHE_SERVER); | |
652 | ||
653 | s->ctx->stats.sess_accept_good++; | |
654 | /* s->server=1; */ | |
655 | s->handshake_func=ssl3_accept; | |
d02b48c6 | 656 | |
b49124f6 BM |
657 | if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); |
658 | } | |
659 | ||
681bfae4 | 660 | ret = 1; |
d02b48c6 | 661 | goto end; |
58964a49 | 662 | /* break; */ |
d02b48c6 RE |
663 | |
664 | default: | |
665 | SSLerr(SSL_F_SSL3_ACCEPT,SSL_R_UNKNOWN_STATE); | |
666 | ret= -1; | |
667 | goto end; | |
58964a49 | 668 | /* break; */ |
d02b48c6 RE |
669 | } |
670 | ||
671 | if (!s->s3->tmp.reuse_message && !skip) | |
672 | { | |
58964a49 RE |
673 | if (s->debug) |
674 | { | |
675 | if ((ret=BIO_flush(s->wbio)) <= 0) | |
676 | goto end; | |
677 | } | |
678 | ||
d02b48c6 RE |
679 | |
680 | if ((cb != NULL) && (s->state != state)) | |
681 | { | |
682 | new_state=s->state; | |
683 | s->state=state; | |
684 | cb(s,SSL_CB_ACCEPT_LOOP,1); | |
685 | s->state=new_state; | |
686 | } | |
687 | } | |
688 | skip=0; | |
689 | } | |
690 | end: | |
691 | /* BIO_flush(s->wbio); */ | |
692 | ||
4d635a70 | 693 | s->in_handshake--; |
d02b48c6 RE |
694 | if (cb != NULL) |
695 | cb(s,SSL_CB_ACCEPT_EXIT,ret); | |
d02b48c6 RE |
696 | return(ret); |
697 | } | |
698 | ||
36d16f8e | 699 | int ssl3_send_hello_request(SSL *s) |
d02b48c6 RE |
700 | { |
701 | unsigned char *p; | |
702 | ||
703 | if (s->state == SSL3_ST_SW_HELLO_REQ_A) | |
704 | { | |
705 | p=(unsigned char *)s->init_buf->data; | |
c51ae173 | 706 | *(p++)=SSL3_MT_HELLO_REQUEST; |
d02b48c6 RE |
707 | *(p++)=0; |
708 | *(p++)=0; | |
709 | *(p++)=0; | |
710 | ||
711 | s->state=SSL3_ST_SW_HELLO_REQ_B; | |
712 | /* number of bytes to write */ | |
713 | s->init_num=4; | |
714 | s->init_off=0; | |
715 | } | |
716 | ||
717 | /* SSL3_ST_SW_HELLO_REQ_B */ | |
718 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
719 | } | |
720 | ||
36d16f8e | 721 | int ssl3_check_client_hello(SSL *s) |
3d14b9d0 DSH |
722 | { |
723 | int ok; | |
724 | long n; | |
725 | ||
b78e5021 BM |
726 | /* this function is called when we really expect a Certificate message, |
727 | * so permit appropriate message length */ | |
36d16f8e | 728 | n=s->method->ssl_get_message(s, |
3d14b9d0 DSH |
729 | SSL3_ST_SR_CERT_A, |
730 | SSL3_ST_SR_CERT_B, | |
731 | -1, | |
c0f5dd07 | 732 | s->max_cert_list, |
3d14b9d0 DSH |
733 | &ok); |
734 | if (!ok) return((int)n); | |
735 | s->s3->tmp.reuse_message = 1; | |
a2a01589 BM |
736 | if (s->s3->tmp.message_type == SSL3_MT_CLIENT_HELLO) |
737 | { | |
738 | /* Throw away what we have done so far in the current handshake, | |
739 | * which will now be aborted. (A full SSL_clear would be too much.) | |
740 | * I hope that tmp.dh is the only thing that may need to be cleared | |
741 | * when a handshake is not completed ... */ | |
bc36ee62 | 742 | #ifndef OPENSSL_NO_DH |
a2a01589 BM |
743 | if (s->s3->tmp.dh != NULL) |
744 | { | |
745 | DH_free(s->s3->tmp.dh); | |
746 | s->s3->tmp.dh = NULL; | |
747 | } | |
748 | #endif | |
749 | return 2; | |
750 | } | |
3d14b9d0 DSH |
751 | return 1; |
752 | } | |
753 | ||
36d16f8e | 754 | int ssl3_get_client_hello(SSL *s) |
d02b48c6 RE |
755 | { |
756 | int i,j,ok,al,ret= -1; | |
6c61726b | 757 | unsigned int cookie_len; |
d02b48c6 RE |
758 | long n; |
759 | unsigned long id; | |
413c4f45 | 760 | unsigned char *p,*d,*q; |
d02b48c6 | 761 | SSL_CIPHER *c; |
09b6c2ef | 762 | #ifndef OPENSSL_NO_COMP |
413c4f45 | 763 | SSL_COMP *comp=NULL; |
09b6c2ef | 764 | #endif |
f73e07cf | 765 | STACK_OF(SSL_CIPHER) *ciphers=NULL; |
d02b48c6 | 766 | |
58964a49 RE |
767 | /* We do this so that we will respond with our native type. |
768 | * If we are TLSv1 and we get SSLv3, we will respond with TLSv1, | |
769 | * This down switching should be handled by a different method. | |
770 | * If we are SSLv3, we will respond with SSLv3, even if prompted with | |
771 | * TLSv1. | |
772 | */ | |
d02b48c6 RE |
773 | if (s->state == SSL3_ST_SR_CLNT_HELLO_A) |
774 | { | |
d02b48c6 RE |
775 | s->state=SSL3_ST_SR_CLNT_HELLO_B; |
776 | } | |
1e24b3a0 | 777 | s->first_packet=1; |
36d16f8e | 778 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
779 | SSL3_ST_SR_CLNT_HELLO_B, |
780 | SSL3_ST_SR_CLNT_HELLO_C, | |
781 | SSL3_MT_CLIENT_HELLO, | |
782 | SSL3_RT_MAX_PLAIN_LENGTH, | |
783 | &ok); | |
784 | ||
785 | if (!ok) return((int)n); | |
1e24b3a0 | 786 | s->first_packet=0; |
48948d53 | 787 | d=p=(unsigned char *)s->init_msg; |
d02b48c6 | 788 | |
074309b7 BM |
789 | /* use version from inside client hello, not from record header |
790 | * (may differ: see RFC 2246, Appendix E, second paragraph) */ | |
791 | s->client_version=(((int)p[0])<<8)|(int)p[1]; | |
d02b48c6 RE |
792 | p+=2; |
793 | ||
7432d073 AP |
794 | if ((s->version == DTLS1_VERSION && s->client_version > s->version) || |
795 | (s->version != DTLS1_VERSION && s->client_version < s->version)) | |
a661b653 BM |
796 | { |
797 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_WRONG_VERSION_NUMBER); | |
89bbe14c | 798 | if ((s->client_version>>8) == SSL3_VERSION_MAJOR) |
a661b653 BM |
799 | { |
800 | /* similar to ssl3_get_record, send alert using remote version number */ | |
801 | s->version = s->client_version; | |
802 | } | |
803 | al = SSL_AD_PROTOCOL_VERSION; | |
804 | goto f_err; | |
805 | } | |
806 | ||
d02b48c6 RE |
807 | /* load the client random */ |
808 | memcpy(s->s3->client_random,p,SSL3_RANDOM_SIZE); | |
809 | p+=SSL3_RANDOM_SIZE; | |
810 | ||
811 | /* get the session-id */ | |
812 | j= *(p++); | |
813 | ||
814 | s->hit=0; | |
6b0e9fac BM |
815 | /* Versions before 0.9.7 always allow session reuse during renegotiation |
816 | * (i.e. when s->new_session is true), option | |
817 | * SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION is new with 0.9.7. | |
818 | * Maybe this optional behaviour should always have been the default, | |
819 | * but we cannot safely change the default behaviour (or new applications | |
820 | * might be written that become totally unsecure when compiled with | |
821 | * an earlier library version) | |
822 | */ | |
6434abbf | 823 | if ((s->new_session && (s->options & SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION))) |
d02b48c6 RE |
824 | { |
825 | if (!ssl_get_new_session(s,1)) | |
826 | goto err; | |
827 | } | |
828 | else | |
829 | { | |
6434abbf | 830 | i=ssl_get_prev_session(s, p, j, d + n); |
d02b48c6 RE |
831 | if (i == 1) |
832 | { /* previous session */ | |
833 | s->hit=1; | |
834 | } | |
8876bc05 BM |
835 | else if (i == -1) |
836 | goto err; | |
837 | else /* i == 0 */ | |
d02b48c6 RE |
838 | { |
839 | if (!ssl_get_new_session(s,1)) | |
840 | goto err; | |
841 | } | |
842 | } | |
843 | ||
844 | p+=j; | |
36d16f8e | 845 | |
7432d073 | 846 | if (s->version == DTLS1_VERSION) |
36d16f8e BL |
847 | { |
848 | /* cookie stuff */ | |
849 | cookie_len = *(p++); | |
850 | ||
beb056b3 BM |
851 | if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) && |
852 | s->d1->send_cookie == 0) | |
853 | { | |
854 | /* HelloVerifyMessage has already been sent */ | |
855 | if ( cookie_len != s->d1->cookie_len) | |
856 | { | |
857 | al = SSL_AD_HANDSHAKE_FAILURE; | |
858 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH); | |
859 | goto f_err; | |
860 | } | |
861 | } | |
862 | ||
863 | /* | |
864 | * The ClientHello may contain a cookie even if the | |
865 | * HelloVerify message has not been sent--make sure that it | |
866 | * does not cause an overflow. | |
867 | */ | |
36d16f8e BL |
868 | if ( cookie_len > sizeof(s->d1->rcvd_cookie)) |
869 | { | |
870 | /* too much data */ | |
beb056b3 | 871 | al = SSL_AD_DECODE_ERROR; |
36d16f8e BL |
872 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, SSL_R_COOKIE_MISMATCH); |
873 | goto f_err; | |
874 | } | |
875 | ||
beb056b3 BM |
876 | /* verify the cookie if appropriate option is set. */ |
877 | if ( (SSL_get_options(s) & SSL_OP_COOKIE_EXCHANGE) && | |
878 | cookie_len > 0) | |
879 | { | |
880 | memcpy(s->d1->rcvd_cookie, p, cookie_len); | |
881 | ||
882 | if ( s->ctx->app_verify_cookie_cb != NULL) | |
883 | { | |
884 | if ( s->ctx->app_verify_cookie_cb(s, s->d1->rcvd_cookie, | |
885 | cookie_len) == 0) | |
886 | { | |
887 | al=SSL_AD_HANDSHAKE_FAILURE; | |
888 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, | |
889 | SSL_R_COOKIE_MISMATCH); | |
890 | goto f_err; | |
891 | } | |
892 | /* else cookie verification succeeded */ | |
893 | } | |
894 | else if ( memcmp(s->d1->rcvd_cookie, s->d1->cookie, | |
895 | s->d1->cookie_len) != 0) /* default verification */ | |
896 | { | |
897 | al=SSL_AD_HANDSHAKE_FAILURE; | |
898 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO, | |
899 | SSL_R_COOKIE_MISMATCH); | |
900 | goto f_err; | |
901 | } | |
902 | } | |
903 | ||
904 | p += cookie_len; | |
36d16f8e BL |
905 | } |
906 | ||
d02b48c6 RE |
907 | n2s(p,i); |
908 | if ((i == 0) && (j != 0)) | |
909 | { | |
910 | /* we need a cipher if we are not resuming a session */ | |
58964a49 | 911 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
912 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_SPECIFIED); |
913 | goto f_err; | |
914 | } | |
82b0bf0b | 915 | if ((p+i) >= (d+n)) |
d02b48c6 RE |
916 | { |
917 | /* not enough data */ | |
58964a49 | 918 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
919 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); |
920 | goto f_err; | |
921 | } | |
922 | if ((i > 0) && (ssl_bytes_to_cipher_list(s,p,i,&(ciphers)) | |
923 | == NULL)) | |
924 | { | |
925 | goto err; | |
926 | } | |
927 | p+=i; | |
928 | ||
929 | /* If it is a hit, check that the cipher is in the list */ | |
930 | if ((s->hit) && (i > 0)) | |
931 | { | |
932 | j=0; | |
933 | id=s->session->cipher->id; | |
934 | ||
413c4f45 MC |
935 | #ifdef CIPHER_DEBUG |
936 | printf("client sent %d ciphers\n",sk_num(ciphers)); | |
937 | #endif | |
f73e07cf | 938 | for (i=0; i<sk_SSL_CIPHER_num(ciphers); i++) |
d02b48c6 | 939 | { |
f73e07cf | 940 | c=sk_SSL_CIPHER_value(ciphers,i); |
413c4f45 MC |
941 | #ifdef CIPHER_DEBUG |
942 | printf("client [%2d of %2d]:%s\n", | |
943 | i,sk_num(ciphers),SSL_CIPHER_get_name(c)); | |
944 | #endif | |
d02b48c6 RE |
945 | if (c->id == id) |
946 | { | |
947 | j=1; | |
948 | break; | |
949 | } | |
950 | } | |
837f2fc7 | 951 | if (j == 0 && (s->options & SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG) && (sk_SSL_CIPHER_num(ciphers) == 1)) |
d02b48c6 | 952 | { |
837f2fc7 BM |
953 | /* Special case as client bug workaround: the previously used cipher may |
954 | * not be in the current list, the client instead might be trying to | |
955 | * continue using a cipher that before wasn't chosen due to server | |
956 | * preferences. We'll have to reject the connection if the cipher is not | |
957 | * enabled, though. */ | |
958 | c = sk_SSL_CIPHER_value(ciphers, 0); | |
959 | if (sk_SSL_CIPHER_find(SSL_get_ciphers(s), c) >= 0) | |
d02b48c6 | 960 | { |
837f2fc7 BM |
961 | s->session->cipher = c; |
962 | j = 1; | |
d02b48c6 RE |
963 | } |
964 | } | |
837f2fc7 BM |
965 | if (j == 0) |
966 | { | |
967 | /* we need to have the cipher in the cipher | |
968 | * list if we are asked to reuse it */ | |
969 | al=SSL_AD_ILLEGAL_PARAMETER; | |
970 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_REQUIRED_CIPHER_MISSING); | |
971 | goto f_err; | |
972 | } | |
d02b48c6 RE |
973 | } |
974 | ||
975 | /* compression */ | |
976 | i= *(p++); | |
82b0bf0b BM |
977 | if ((p+i) > (d+n)) |
978 | { | |
979 | /* not enough data */ | |
980 | al=SSL_AD_DECODE_ERROR; | |
981 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_LENGTH_MISMATCH); | |
982 | goto f_err; | |
983 | } | |
413c4f45 | 984 | q=p; |
d02b48c6 | 985 | for (j=0; j<i; j++) |
413c4f45 | 986 | { |
d02b48c6 | 987 | if (p[j] == 0) break; |
413c4f45 | 988 | } |
d02b48c6 RE |
989 | |
990 | p+=i; | |
991 | if (j >= i) | |
992 | { | |
993 | /* no compress */ | |
58964a49 | 994 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
995 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_COMPRESSION_SPECIFIED); |
996 | goto f_err; | |
997 | } | |
998 | ||
58ece833 BM |
999 | #ifndef OPENSSL_NO_TLSEXT |
1000 | /* TLS extensions*/ | |
1001 | if (s->version > SSL3_VERSION) | |
1002 | { | |
1003 | if (!ssl_parse_clienthello_tlsext(s,&p,d,n, &al)) | |
1004 | { | |
1005 | /* 'al' set by ssl_parse_clienthello_tlsext */ | |
36ca4ba6 | 1006 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_PARSE_TLSEXT); |
58ece833 BM |
1007 | goto f_err; |
1008 | } | |
1009 | } | |
36ca4ba6 | 1010 | if (ssl_check_clienthello_tlsext(s) <= 0) { |
a291745e | 1011 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); |
58ece833 BM |
1012 | goto err; |
1013 | } | |
12bf56c0 DSH |
1014 | |
1015 | /* Check if we want to use external pre-shared secret for this | |
1016 | * handshake for not reused session only. We need to generate | |
1017 | * server_random before calling tls_session_secret_cb in order to allow | |
1018 | * SessionTicket processing to use it in key derivation. */ | |
1019 | { | |
1020 | unsigned long Time; | |
1021 | unsigned char *pos; | |
1022 | Time=(unsigned long)time(NULL); /* Time */ | |
1023 | pos=s->s3->server_random; | |
1024 | l2n(Time,pos); | |
1025 | if (RAND_pseudo_bytes(pos,SSL3_RANDOM_SIZE-4) <= 0) | |
1026 | { | |
1027 | al=SSL_AD_INTERNAL_ERROR; | |
1028 | goto f_err; | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | if (!s->hit && s->version >= TLS1_VERSION && s->tls_session_secret_cb) | |
1033 | { | |
1034 | SSL_CIPHER *pref_cipher=NULL; | |
1035 | ||
1036 | s->session->master_key_length=sizeof(s->session->master_key); | |
1037 | if(s->tls_session_secret_cb(s, s->session->master_key, &s->session->master_key_length, | |
1038 | ciphers, &pref_cipher, s->tls_session_secret_cb_arg)) | |
1039 | { | |
1040 | s->hit=1; | |
1041 | s->session->ciphers=ciphers; | |
1042 | s->session->verify_result=X509_V_OK; | |
1043 | ||
1044 | ciphers=NULL; | |
1045 | ||
1046 | /* check if some cipher was preferred by call back */ | |
1047 | pref_cipher=pref_cipher ? pref_cipher : ssl3_choose_cipher(s, s->session->ciphers, SSL_get_ciphers(s)); | |
1048 | if (pref_cipher == NULL) | |
1049 | { | |
1050 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1051 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER); | |
1052 | goto f_err; | |
1053 | } | |
1054 | ||
1055 | s->session->cipher=pref_cipher; | |
1056 | ||
1057 | if (s->cipher_list) | |
1058 | sk_SSL_CIPHER_free(s->cipher_list); | |
1059 | ||
1060 | if (s->cipher_list_by_id) | |
1061 | sk_SSL_CIPHER_free(s->cipher_list_by_id); | |
1062 | ||
1063 | s->cipher_list = sk_SSL_CIPHER_dup(s->session->ciphers); | |
1064 | s->cipher_list_by_id = sk_SSL_CIPHER_dup(s->session->ciphers); | |
1065 | } | |
1066 | } | |
58ece833 BM |
1067 | #endif |
1068 | ||
413c4f45 MC |
1069 | /* Worst case, we will use the NULL compression, but if we have other |
1070 | * options, we will now look for them. We have i-1 compression | |
1071 | * algorithms from the client, starting at q. */ | |
1072 | s->s3->tmp.new_compression=NULL; | |
09b6c2ef | 1073 | #ifndef OPENSSL_NO_COMP |
566dda07 | 1074 | if (!(s->options & SSL_OP_NO_COMPRESSION) && s->ctx->comp_methods) |
413c4f45 MC |
1075 | { /* See if we have a match */ |
1076 | int m,nn,o,v,done=0; | |
1077 | ||
f73e07cf | 1078 | nn=sk_SSL_COMP_num(s->ctx->comp_methods); |
413c4f45 MC |
1079 | for (m=0; m<nn; m++) |
1080 | { | |
f73e07cf | 1081 | comp=sk_SSL_COMP_value(s->ctx->comp_methods,m); |
413c4f45 MC |
1082 | v=comp->id; |
1083 | for (o=0; o<i; o++) | |
1084 | { | |
1085 | if (v == q[o]) | |
1086 | { | |
1087 | done=1; | |
1088 | break; | |
1089 | } | |
1090 | } | |
1091 | if (done) break; | |
1092 | } | |
1093 | if (done) | |
1094 | s->s3->tmp.new_compression=comp; | |
1095 | else | |
1096 | comp=NULL; | |
1097 | } | |
09b6c2ef | 1098 | #endif |
413c4f45 | 1099 | |
836f9960 | 1100 | /* Given s->session->ciphers and SSL_get_ciphers, we must |
d02b48c6 RE |
1101 | * pick a cipher */ |
1102 | ||
1103 | if (!s->hit) | |
1104 | { | |
09b6c2ef DSH |
1105 | #ifdef OPENSSL_NO_COMP |
1106 | s->session->compress_meth=0; | |
1107 | #else | |
413c4f45 | 1108 | s->session->compress_meth=(comp == NULL)?0:comp->id; |
09b6c2ef | 1109 | #endif |
d02b48c6 | 1110 | if (s->session->ciphers != NULL) |
f73e07cf | 1111 | sk_SSL_CIPHER_free(s->session->ciphers); |
d02b48c6 RE |
1112 | s->session->ciphers=ciphers; |
1113 | if (ciphers == NULL) | |
1114 | { | |
58964a49 | 1115 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
1116 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_CIPHERS_PASSED); |
1117 | goto f_err; | |
1118 | } | |
1119 | ciphers=NULL; | |
1120 | c=ssl3_choose_cipher(s,s->session->ciphers, | |
836f9960 | 1121 | SSL_get_ciphers(s)); |
d02b48c6 RE |
1122 | |
1123 | if (c == NULL) | |
1124 | { | |
58964a49 | 1125 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1126 | SSLerr(SSL_F_SSL3_GET_CLIENT_HELLO,SSL_R_NO_SHARED_CIPHER); |
1127 | goto f_err; | |
1128 | } | |
1129 | s->s3->tmp.new_cipher=c; | |
1130 | } | |
1131 | else | |
1132 | { | |
1133 | /* Session-id reuse */ | |
1134 | #ifdef REUSE_CIPHER_BUG | |
f73e07cf | 1135 | STACK_OF(SSL_CIPHER) *sk; |
d02b48c6 RE |
1136 | SSL_CIPHER *nc=NULL; |
1137 | SSL_CIPHER *ec=NULL; | |
1138 | ||
58964a49 | 1139 | if (s->options & SSL_OP_NETSCAPE_DEMO_CIPHER_CHANGE_BUG) |
d02b48c6 RE |
1140 | { |
1141 | sk=s->session->ciphers; | |
f73e07cf | 1142 | for (i=0; i<sk_SSL_CIPHER_num(sk); i++) |
d02b48c6 | 1143 | { |
f73e07cf | 1144 | c=sk_SSL_CIPHER_value(sk,i); |
52b8dad8 | 1145 | if (c->algorithm_enc & SSL_eNULL) |
d02b48c6 | 1146 | nc=c; |
06ab81f9 | 1147 | if (SSL_C_IS_EXPORT(c)) |
d02b48c6 RE |
1148 | ec=c; |
1149 | } | |
1150 | if (nc != NULL) | |
1151 | s->s3->tmp.new_cipher=nc; | |
1152 | else if (ec != NULL) | |
1153 | s->s3->tmp.new_cipher=ec; | |
1154 | else | |
1155 | s->s3->tmp.new_cipher=s->session->cipher; | |
1156 | } | |
1157 | else | |
1158 | #endif | |
1159 | s->s3->tmp.new_cipher=s->session->cipher; | |
1160 | } | |
30551400 | 1161 | |
6ba71a71 BL |
1162 | if (!ssl3_digest_cached_records(s)) |
1163 | goto f_err; | |
d02b48c6 RE |
1164 | |
1165 | /* we now have the following setup. | |
1166 | * client_random | |
1167 | * cipher_list - our prefered list of ciphers | |
1168 | * ciphers - the clients prefered list of ciphers | |
1169 | * compression - basically ignored right now | |
1170 | * ssl version is set - sslv3 | |
1171 | * s->session - The ssl session has been setup. | |
657e60fa | 1172 | * s->hit - session reuse flag |
d02b48c6 RE |
1173 | * s->tmp.new_cipher - the new cipher to use. |
1174 | */ | |
1175 | ||
1176 | ret=1; | |
1177 | if (0) | |
1178 | { | |
1179 | f_err: | |
1180 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1181 | } | |
1182 | err: | |
f73e07cf | 1183 | if (ciphers != NULL) sk_SSL_CIPHER_free(ciphers); |
d02b48c6 RE |
1184 | return(ret); |
1185 | } | |
1186 | ||
36d16f8e | 1187 | int ssl3_send_server_hello(SSL *s) |
d02b48c6 RE |
1188 | { |
1189 | unsigned char *buf; | |
1190 | unsigned char *p,*d; | |
1191 | int i,sl; | |
12bf56c0 DSH |
1192 | unsigned long l; |
1193 | #ifdef OPENSSL_NO_TLSEXT | |
1194 | unsigned long Time; | |
1195 | #endif | |
d02b48c6 RE |
1196 | |
1197 | if (s->state == SSL3_ST_SW_SRVR_HELLO_A) | |
1198 | { | |
1199 | buf=(unsigned char *)s->init_buf->data; | |
12bf56c0 | 1200 | #ifdef OPENSSL_NO_TLSEXT |
d02b48c6 | 1201 | p=s->s3->server_random; |
12bf56c0 | 1202 | /* Generate server_random if it was not needed previously */ |
7bbcb2f6 | 1203 | Time=(unsigned long)time(NULL); /* Time */ |
d02b48c6 | 1204 | l2n(Time,p); |
7c7667b8 NL |
1205 | if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) |
1206 | return -1; | |
12bf56c0 | 1207 | #endif |
d02b48c6 RE |
1208 | /* Do the message type and length last */ |
1209 | d=p= &(buf[4]); | |
1210 | ||
58964a49 RE |
1211 | *(p++)=s->version>>8; |
1212 | *(p++)=s->version&0xff; | |
d02b48c6 RE |
1213 | |
1214 | /* Random stuff */ | |
1215 | memcpy(p,s->s3->server_random,SSL3_RANDOM_SIZE); | |
1216 | p+=SSL3_RANDOM_SIZE; | |
1217 | ||
1218 | /* now in theory we have 3 options to sending back the | |
1219 | * session id. If it is a re-use, we send back the | |
1220 | * old session-id, if it is a new session, we send | |
1221 | * back the new session-id or we send back a 0 length | |
1222 | * session-id if we want it to be single use. | |
1223 | * Currently I will not implement the '0' length session-id | |
58964a49 | 1224 | * 12-Jan-98 - I'll now support the '0' length stuff. |
dc634aff DSH |
1225 | * |
1226 | * We also have an additional case where stateless session | |
1227 | * resumption is successful: we always send back the old | |
1228 | * session id. In this case s->hit is non zero: this can | |
1229 | * only happen if stateless session resumption is succesful | |
1230 | * if session caching is disabled so existing functionality | |
1231 | * is unaffected. | |
d02b48c6 | 1232 | */ |
dc634aff DSH |
1233 | if (!(s->ctx->session_cache_mode & SSL_SESS_CACHE_SERVER) |
1234 | && !s->hit) | |
58964a49 | 1235 | s->session->session_id_length=0; |
d02b48c6 RE |
1236 | |
1237 | sl=s->session->session_id_length; | |
27545970 | 1238 | if (sl > (int)sizeof(s->session->session_id)) |
5574e0ed BM |
1239 | { |
1240 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO, ERR_R_INTERNAL_ERROR); | |
1241 | return -1; | |
1242 | } | |
d02b48c6 RE |
1243 | *(p++)=sl; |
1244 | memcpy(p,s->session->session_id,sl); | |
1245 | p+=sl; | |
1246 | ||
1247 | /* put the cipher */ | |
1248 | i=ssl3_put_cipher_by_char(s->s3->tmp.new_cipher,p); | |
1249 | p+=i; | |
1250 | ||
1251 | /* put the compression method */ | |
09b6c2ef DSH |
1252 | #ifdef OPENSSL_NO_COMP |
1253 | *(p++)=0; | |
1254 | #else | |
413c4f45 MC |
1255 | if (s->s3->tmp.new_compression == NULL) |
1256 | *(p++)=0; | |
1257 | else | |
1258 | *(p++)=s->s3->tmp.new_compression->id; | |
09b6c2ef | 1259 | #endif |
ed3883d2 | 1260 | #ifndef OPENSSL_NO_TLSEXT |
36ca4ba6 BM |
1261 | if (ssl_prepare_serverhello_tlsext(s) <= 0) |
1262 | { | |
1263 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); | |
1264 | return -1; | |
1265 | } | |
f1fd4544 BM |
1266 | if ((p = ssl_add_serverhello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) |
1267 | { | |
ed3883d2 BM |
1268 | SSLerr(SSL_F_SSL3_SEND_SERVER_HELLO,ERR_R_INTERNAL_ERROR); |
1269 | return -1; | |
f1fd4544 | 1270 | } |
ed3883d2 | 1271 | #endif |
d02b48c6 RE |
1272 | /* do the header */ |
1273 | l=(p-d); | |
1274 | d=buf; | |
1275 | *(d++)=SSL3_MT_SERVER_HELLO; | |
1276 | l2n3(l,d); | |
1277 | ||
fcbdde0d | 1278 | s->state=SSL3_ST_SW_SRVR_HELLO_B; |
d02b48c6 RE |
1279 | /* number of bytes to write */ |
1280 | s->init_num=p-buf; | |
1281 | s->init_off=0; | |
1282 | } | |
1283 | ||
fcbdde0d | 1284 | /* SSL3_ST_SW_SRVR_HELLO_B */ |
d02b48c6 RE |
1285 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); |
1286 | } | |
1287 | ||
36d16f8e | 1288 | int ssl3_send_server_done(SSL *s) |
d02b48c6 RE |
1289 | { |
1290 | unsigned char *p; | |
1291 | ||
1292 | if (s->state == SSL3_ST_SW_SRVR_DONE_A) | |
1293 | { | |
1294 | p=(unsigned char *)s->init_buf->data; | |
1295 | ||
1296 | /* do the header */ | |
1297 | *(p++)=SSL3_MT_SERVER_DONE; | |
1298 | *(p++)=0; | |
1299 | *(p++)=0; | |
1300 | *(p++)=0; | |
1301 | ||
1302 | s->state=SSL3_ST_SW_SRVR_DONE_B; | |
1303 | /* number of bytes to write */ | |
1304 | s->init_num=4; | |
1305 | s->init_off=0; | |
1306 | } | |
1307 | ||
e65bcbce | 1308 | /* SSL3_ST_SW_SRVR_DONE_B */ |
d02b48c6 RE |
1309 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); |
1310 | } | |
1311 | ||
36d16f8e | 1312 | int ssl3_send_server_key_exchange(SSL *s) |
d02b48c6 | 1313 | { |
bc36ee62 | 1314 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
1315 | unsigned char *q; |
1316 | int j,num; | |
1317 | RSA *rsa; | |
1318 | unsigned char md_buf[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; | |
752d706a | 1319 | unsigned int u; |
d02b48c6 | 1320 | #endif |
bc36ee62 | 1321 | #ifndef OPENSSL_NO_DH |
9d1a01be | 1322 | DH *dh=NULL,*dhp; |
ea262260 BM |
1323 | #endif |
1324 | #ifndef OPENSSL_NO_ECDH | |
1325 | EC_KEY *ecdh=NULL, *ecdhp; | |
1326 | unsigned char *encodedPoint = NULL; | |
1327 | int encodedlen = 0; | |
1328 | int curve_id = 0; | |
1329 | BN_CTX *bn_ctx = NULL; | |
d02b48c6 RE |
1330 | #endif |
1331 | EVP_PKEY *pkey; | |
1332 | unsigned char *p,*d; | |
1333 | int al,i; | |
1334 | unsigned long type; | |
1335 | int n; | |
1336 | CERT *cert; | |
1337 | BIGNUM *r[4]; | |
1338 | int nr[4],kn; | |
1339 | BUF_MEM *buf; | |
1340 | EVP_MD_CTX md_ctx; | |
1341 | ||
dbad1690 | 1342 | EVP_MD_CTX_init(&md_ctx); |
d02b48c6 RE |
1343 | if (s->state == SSL3_ST_SW_KEY_EXCH_A) |
1344 | { | |
52b8dad8 | 1345 | type=s->s3->tmp.new_cipher->algorithm_mkey; |
b56bce4f | 1346 | cert=s->cert; |
d02b48c6 RE |
1347 | |
1348 | buf=s->init_buf; | |
1349 | ||
1350 | r[0]=r[1]=r[2]=r[3]=NULL; | |
1351 | n=0; | |
bc36ee62 | 1352 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
1353 | if (type & SSL_kRSA) |
1354 | { | |
1355 | rsa=cert->rsa_tmp; | |
ca8e5b9b | 1356 | if ((rsa == NULL) && (s->cert->rsa_tmp_cb != NULL)) |
d02b48c6 | 1357 | { |
ca8e5b9b | 1358 | rsa=s->cert->rsa_tmp_cb(s, |
f415fa32 | 1359 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), |
60e31c3a | 1360 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); |
fbb41ae0 DSH |
1361 | if(rsa == NULL) |
1362 | { | |
1363 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1364 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ERROR_GENERATING_TMP_RSA_KEY); | |
1365 | goto f_err; | |
1366 | } | |
6ac4e8bd | 1367 | RSA_up_ref(rsa); |
d02b48c6 RE |
1368 | cert->rsa_tmp=rsa; |
1369 | } | |
1370 | if (rsa == NULL) | |
1371 | { | |
58964a49 | 1372 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1373 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_KEY); |
1374 | goto f_err; | |
1375 | } | |
1376 | r[0]=rsa->n; | |
1377 | r[1]=rsa->e; | |
1378 | s->s3->tmp.use_rsa_tmp=1; | |
1379 | } | |
1380 | else | |
1381 | #endif | |
bc36ee62 | 1382 | #ifndef OPENSSL_NO_DH |
d02b48c6 RE |
1383 | if (type & SSL_kEDH) |
1384 | { | |
1385 | dhp=cert->dh_tmp; | |
ca8e5b9b BM |
1386 | if ((dhp == NULL) && (s->cert->dh_tmp_cb != NULL)) |
1387 | dhp=s->cert->dh_tmp_cb(s, | |
2c05c494 | 1388 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), |
60e31c3a | 1389 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); |
d02b48c6 RE |
1390 | if (dhp == NULL) |
1391 | { | |
58964a49 | 1392 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1393 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
1394 | goto f_err; | |
1395 | } | |
a87030a1 BM |
1396 | |
1397 | if (s->s3->tmp.dh != NULL) | |
1398 | { | |
1399 | DH_free(dh); | |
5277d7cb | 1400 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); |
a87030a1 BM |
1401 | goto err; |
1402 | } | |
1403 | ||
d02b48c6 RE |
1404 | if ((dh=DHparams_dup(dhp)) == NULL) |
1405 | { | |
1406 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1407 | goto err; | |
1408 | } | |
1409 | ||
1410 | s->s3->tmp.dh=dh; | |
6fa89f94 BL |
1411 | if ((dhp->pub_key == NULL || |
1412 | dhp->priv_key == NULL || | |
1413 | (s->options & SSL_OP_SINGLE_DH_USE))) | |
d02b48c6 | 1414 | { |
6fa89f94 BL |
1415 | if(!DH_generate_key(dh)) |
1416 | { | |
1417 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, | |
1418 | ERR_R_DH_LIB); | |
1419 | goto err; | |
1420 | } | |
d02b48c6 RE |
1421 | } |
1422 | else | |
1423 | { | |
1424 | dh->pub_key=BN_dup(dhp->pub_key); | |
1425 | dh->priv_key=BN_dup(dhp->priv_key); | |
1426 | if ((dh->pub_key == NULL) || | |
1427 | (dh->priv_key == NULL)) | |
1428 | { | |
1429 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_DH_LIB); | |
1430 | goto err; | |
1431 | } | |
1432 | } | |
1433 | r[0]=dh->p; | |
1434 | r[1]=dh->g; | |
1435 | r[2]=dh->pub_key; | |
1436 | } | |
1437 | else | |
1438 | #endif | |
ea262260 | 1439 | #ifndef OPENSSL_NO_ECDH |
89bbe14c | 1440 | if (type & SSL_kEECDH) |
ea262260 | 1441 | { |
9dd84053 NL |
1442 | const EC_GROUP *group; |
1443 | ||
ea262260 BM |
1444 | ecdhp=cert->ecdh_tmp; |
1445 | if ((ecdhp == NULL) && (s->cert->ecdh_tmp_cb != NULL)) | |
1446 | { | |
1447 | ecdhp=s->cert->ecdh_tmp_cb(s, | |
1448 | SSL_C_IS_EXPORT(s->s3->tmp.new_cipher), | |
1449 | SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)); | |
1450 | } | |
1451 | if (ecdhp == NULL) | |
1452 | { | |
1453 | al=SSL_AD_HANDSHAKE_FAILURE; | |
1454 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); | |
1455 | goto f_err; | |
1456 | } | |
1457 | ||
1458 | if (s->s3->tmp.ecdh != NULL) | |
1459 | { | |
1460 | EC_KEY_free(s->s3->tmp.ecdh); | |
1461 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); | |
1462 | goto err; | |
1463 | } | |
1464 | ||
1465 | /* Duplicate the ECDH structure. */ | |
1466 | if (ecdhp == NULL) | |
1467 | { | |
1468 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1469 | goto err; | |
1470 | } | |
1471 | if (!EC_KEY_up_ref(ecdhp)) | |
1472 | { | |
aa4ce731 | 1473 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); |
ea262260 BM |
1474 | goto err; |
1475 | } | |
1476 | ecdh = ecdhp; | |
1477 | ||
1478 | s->s3->tmp.ecdh=ecdh; | |
9dd84053 NL |
1479 | if ((EC_KEY_get0_public_key(ecdh) == NULL) || |
1480 | (EC_KEY_get0_private_key(ecdh) == NULL) || | |
ea262260 BM |
1481 | (s->options & SSL_OP_SINGLE_ECDH_USE)) |
1482 | { | |
1483 | if(!EC_KEY_generate_key(ecdh)) | |
1484 | { | |
1485 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1486 | goto err; | |
1487 | } | |
1488 | } | |
1489 | ||
9dd84053 NL |
1490 | if (((group = EC_KEY_get0_group(ecdh)) == NULL) || |
1491 | (EC_KEY_get0_public_key(ecdh) == NULL) || | |
1492 | (EC_KEY_get0_private_key(ecdh) == NULL)) | |
ea262260 BM |
1493 | { |
1494 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1495 | goto err; | |
1496 | } | |
1497 | ||
1498 | if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && | |
9dd84053 | 1499 | (EC_GROUP_get_degree(group) > 163)) |
ea262260 BM |
1500 | { |
1501 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); | |
1502 | goto err; | |
1503 | } | |
1504 | ||
1505 | /* XXX: For now, we only support ephemeral ECDH | |
1506 | * keys over named (not generic) curves. For | |
1507 | * supported named curves, curve_id is non-zero. | |
1508 | */ | |
1509 | if ((curve_id = | |
33273721 | 1510 | tls1_ec_nid2curve_id(EC_GROUP_get_curve_name(group))) |
ea262260 BM |
1511 | == 0) |
1512 | { | |
1513 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNSUPPORTED_ELLIPTIC_CURVE); | |
1514 | goto err; | |
1515 | } | |
1516 | ||
1517 | /* Encode the public key. | |
1518 | * First check the size of encoding and | |
1519 | * allocate memory accordingly. | |
1520 | */ | |
9dd84053 NL |
1521 | encodedlen = EC_POINT_point2oct(group, |
1522 | EC_KEY_get0_public_key(ecdh), | |
ea262260 BM |
1523 | POINT_CONVERSION_UNCOMPRESSED, |
1524 | NULL, 0, NULL); | |
1525 | ||
1526 | encodedPoint = (unsigned char *) | |
1527 | OPENSSL_malloc(encodedlen*sizeof(unsigned char)); | |
1528 | bn_ctx = BN_CTX_new(); | |
1529 | if ((encodedPoint == NULL) || (bn_ctx == NULL)) | |
1530 | { | |
1531 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); | |
1532 | goto err; | |
1533 | } | |
1534 | ||
1535 | ||
9dd84053 NL |
1536 | encodedlen = EC_POINT_point2oct(group, |
1537 | EC_KEY_get0_public_key(ecdh), | |
ea262260 BM |
1538 | POINT_CONVERSION_UNCOMPRESSED, |
1539 | encodedPoint, encodedlen, bn_ctx); | |
1540 | ||
1541 | if (encodedlen == 0) | |
1542 | { | |
1543 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_R_ECDH_LIB); | |
1544 | goto err; | |
1545 | } | |
1546 | ||
1547 | BN_CTX_free(bn_ctx); bn_ctx=NULL; | |
1548 | ||
1549 | /* XXX: For now, we only support named (not | |
1550 | * generic) curves in ECDH ephemeral key exchanges. | |
d56349a2 | 1551 | * In this situation, we need four additional bytes |
ea262260 BM |
1552 | * to encode the entire ServerECDHParams |
1553 | * structure. | |
1554 | */ | |
d56349a2 | 1555 | n = 4 + encodedlen; |
ea262260 BM |
1556 | |
1557 | /* We'll generate the serverKeyExchange message | |
1558 | * explicitly so we can set these to NULLs | |
1559 | */ | |
1560 | r[0]=NULL; | |
1561 | r[1]=NULL; | |
1562 | r[2]=NULL; | |
d56349a2 | 1563 | r[3]=NULL; |
ea262260 BM |
1564 | } |
1565 | else | |
1566 | #endif /* !OPENSSL_NO_ECDH */ | |
ddac1974 NL |
1567 | #ifndef OPENSSL_NO_PSK |
1568 | if (type & SSL_kPSK) | |
1569 | { | |
1570 | /* reserve size for record length and PSK identity hint*/ | |
1571 | n+=2+strlen(s->ctx->psk_identity_hint); | |
1572 | } | |
1573 | else | |
1574 | #endif /* !OPENSSL_NO_PSK */ | |
d02b48c6 | 1575 | { |
58964a49 | 1576 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1577 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); |
1578 | goto f_err; | |
1579 | } | |
1580 | for (i=0; r[i] != NULL; i++) | |
1581 | { | |
1582 | nr[i]=BN_num_bytes(r[i]); | |
1583 | n+=2+nr[i]; | |
1584 | } | |
1585 | ||
52b8dad8 BM |
1586 | if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) |
1587 | && !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) | |
d02b48c6 RE |
1588 | { |
1589 | if ((pkey=ssl_get_sign_pkey(s,s->s3->tmp.new_cipher)) | |
1590 | == NULL) | |
1591 | { | |
58964a49 | 1592 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
1593 | goto f_err; |
1594 | } | |
1595 | kn=EVP_PKEY_size(pkey); | |
1596 | } | |
1597 | else | |
1598 | { | |
1599 | pkey=NULL; | |
1600 | kn=0; | |
1601 | } | |
1602 | ||
54a656ef | 1603 | if (!BUF_MEM_grow_clean(buf,n+4+kn)) |
d02b48c6 RE |
1604 | { |
1605 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_BUF); | |
1606 | goto err; | |
1607 | } | |
1608 | d=(unsigned char *)s->init_buf->data; | |
1609 | p= &(d[4]); | |
1610 | ||
1611 | for (i=0; r[i] != NULL; i++) | |
1612 | { | |
1613 | s2n(nr[i],p); | |
1614 | BN_bn2bin(r[i],p); | |
1615 | p+=nr[i]; | |
1616 | } | |
1617 | ||
ea262260 | 1618 | #ifndef OPENSSL_NO_ECDH |
89bbe14c | 1619 | if (type & SSL_kEECDH) |
ea262260 BM |
1620 | { |
1621 | /* XXX: For now, we only support named (not generic) curves. | |
1622 | * In this situation, the serverKeyExchange message has: | |
d56349a2 | 1623 | * [1 byte CurveType], [2 byte CurveName] |
ea262260 BM |
1624 | * [1 byte length of encoded point], followed by |
1625 | * the actual encoded point itself | |
1626 | */ | |
1627 | *p = NAMED_CURVE_TYPE; | |
1628 | p += 1; | |
d56349a2 BM |
1629 | *p = 0; |
1630 | p += 1; | |
ea262260 BM |
1631 | *p = curve_id; |
1632 | p += 1; | |
1633 | *p = encodedlen; | |
1634 | p += 1; | |
1635 | memcpy((unsigned char*)p, | |
1636 | (unsigned char *)encodedPoint, | |
1637 | encodedlen); | |
1638 | OPENSSL_free(encodedPoint); | |
1639 | p += encodedlen; | |
1640 | } | |
1641 | #endif | |
1642 | ||
ddac1974 NL |
1643 | #ifndef OPENSSL_NO_PSK |
1644 | if (type & SSL_kPSK) | |
1645 | { | |
1646 | /* copy PSK identity hint */ | |
1647 | s2n(strlen(s->ctx->psk_identity_hint), p); | |
07ef6129 | 1648 | strncpy((char *)p, s->ctx->psk_identity_hint, strlen(s->ctx->psk_identity_hint)); |
ddac1974 NL |
1649 | p+=strlen(s->ctx->psk_identity_hint); |
1650 | } | |
1651 | #endif | |
1652 | ||
d02b48c6 RE |
1653 | /* not anonymous */ |
1654 | if (pkey != NULL) | |
1655 | { | |
1656 | /* n is the length of the params, they start at &(d[4]) | |
1657 | * and p points to the space at the end. */ | |
bc36ee62 | 1658 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
1659 | if (pkey->type == EVP_PKEY_RSA) |
1660 | { | |
1661 | q=md_buf; | |
1662 | j=0; | |
1663 | for (num=2; num > 0; num--) | |
1664 | { | |
20d2186c DSH |
1665 | EVP_DigestInit_ex(&md_ctx,(num == 2) |
1666 | ?s->ctx->md5:s->ctx->sha1, NULL); | |
d02b48c6 RE |
1667 | EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); |
1668 | EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
1669 | EVP_DigestUpdate(&md_ctx,&(d[4]),n); | |
20d2186c | 1670 | EVP_DigestFinal_ex(&md_ctx,q, |
d02b48c6 RE |
1671 | (unsigned int *)&i); |
1672 | q+=i; | |
1673 | j+=i; | |
1674 | } | |
1c80019a | 1675 | if (RSA_sign(NID_md5_sha1, md_buf, j, |
ca7fea96 | 1676 | &(p[2]), &u, pkey->pkey.rsa) <= 0) |
d02b48c6 RE |
1677 | { |
1678 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_RSA); | |
1679 | goto err; | |
1680 | } | |
ca7fea96 BL |
1681 | s2n(u,p); |
1682 | n+=u+2; | |
d02b48c6 RE |
1683 | } |
1684 | else | |
1685 | #endif | |
bc36ee62 | 1686 | #if !defined(OPENSSL_NO_DSA) |
d02b48c6 RE |
1687 | if (pkey->type == EVP_PKEY_DSA) |
1688 | { | |
1689 | /* lets do DSS */ | |
20d2186c | 1690 | EVP_SignInit_ex(&md_ctx,EVP_dss1(), NULL); |
d02b48c6 RE |
1691 | EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); |
1692 | EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
1693 | EVP_SignUpdate(&md_ctx,&(d[4]),n); | |
1694 | if (!EVP_SignFinal(&md_ctx,&(p[2]), | |
1695 | (unsigned int *)&i,pkey)) | |
1696 | { | |
1697 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_DSA); | |
1698 | goto err; | |
1699 | } | |
1700 | s2n(i,p); | |
1701 | n+=i+2; | |
1702 | } | |
1703 | else | |
ea262260 BM |
1704 | #endif |
1705 | #if !defined(OPENSSL_NO_ECDSA) | |
5488bb61 | 1706 | if (pkey->type == EVP_PKEY_EC) |
ea262260 BM |
1707 | { |
1708 | /* let's do ECDSA */ | |
1709 | EVP_SignInit_ex(&md_ctx,EVP_ecdsa(), NULL); | |
1710 | EVP_SignUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); | |
1711 | EVP_SignUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); | |
1712 | EVP_SignUpdate(&md_ctx,&(d[4]),n); | |
1713 | if (!EVP_SignFinal(&md_ctx,&(p[2]), | |
1714 | (unsigned int *)&i,pkey)) | |
1715 | { | |
1716 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,ERR_LIB_ECDSA); | |
1717 | goto err; | |
1718 | } | |
1719 | s2n(i,p); | |
1720 | n+=i+2; | |
1721 | } | |
1722 | else | |
d02b48c6 RE |
1723 | #endif |
1724 | { | |
1725 | /* Is this error check actually needed? */ | |
58964a49 | 1726 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1727 | SSLerr(SSL_F_SSL3_SEND_SERVER_KEY_EXCHANGE,SSL_R_UNKNOWN_PKEY_TYPE); |
1728 | goto f_err; | |
1729 | } | |
1730 | } | |
1731 | ||
1732 | *(d++)=SSL3_MT_SERVER_KEY_EXCHANGE; | |
1733 | l2n3(n,d); | |
1734 | ||
1735 | /* we should now have things packed up, so lets send | |
1736 | * it off */ | |
1737 | s->init_num=n+4; | |
1738 | s->init_off=0; | |
1739 | } | |
1740 | ||
a87030a1 | 1741 | s->state = SSL3_ST_SW_KEY_EXCH_B; |
dbad1690 | 1742 | EVP_MD_CTX_cleanup(&md_ctx); |
d02b48c6 RE |
1743 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); |
1744 | f_err: | |
1745 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
1746 | err: | |
ea262260 BM |
1747 | #ifndef OPENSSL_NO_ECDH |
1748 | if (encodedPoint != NULL) OPENSSL_free(encodedPoint); | |
1749 | BN_CTX_free(bn_ctx); | |
1750 | #endif | |
dbad1690 | 1751 | EVP_MD_CTX_cleanup(&md_ctx); |
d02b48c6 RE |
1752 | return(-1); |
1753 | } | |
1754 | ||
36d16f8e | 1755 | int ssl3_send_certificate_request(SSL *s) |
d02b48c6 RE |
1756 | { |
1757 | unsigned char *p,*d; | |
1758 | int i,j,nl,off,n; | |
f73e07cf | 1759 | STACK_OF(X509_NAME) *sk=NULL; |
d02b48c6 RE |
1760 | X509_NAME *name; |
1761 | BUF_MEM *buf; | |
1762 | ||
1763 | if (s->state == SSL3_ST_SW_CERT_REQ_A) | |
1764 | { | |
1765 | buf=s->init_buf; | |
1766 | ||
1767 | d=p=(unsigned char *)&(buf->data[4]); | |
1768 | ||
1769 | /* get the list of acceptable cert types */ | |
1770 | p++; | |
1771 | n=ssl3_get_req_cert_type(s,p); | |
1772 | d[0]=n; | |
1773 | p+=n; | |
1774 | n++; | |
1775 | ||
1776 | off=n; | |
1777 | p+=2; | |
1778 | n+=2; | |
1779 | ||
1780 | sk=SSL_get_client_CA_list(s); | |
1781 | nl=0; | |
1782 | if (sk != NULL) | |
1783 | { | |
f73e07cf | 1784 | for (i=0; i<sk_X509_NAME_num(sk); i++) |
d02b48c6 | 1785 | { |
f73e07cf | 1786 | name=sk_X509_NAME_value(sk,i); |
d02b48c6 | 1787 | j=i2d_X509_NAME(name,NULL); |
54a656ef | 1788 | if (!BUF_MEM_grow_clean(buf,4+n+j+2)) |
d02b48c6 RE |
1789 | { |
1790 | SSLerr(SSL_F_SSL3_SEND_CERTIFICATE_REQUEST,ERR_R_BUF_LIB); | |
1791 | goto err; | |
1792 | } | |
1793 | p=(unsigned char *)&(buf->data[4+n]); | |
58964a49 | 1794 | if (!(s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) |
d02b48c6 RE |
1795 | { |
1796 | s2n(j,p); | |
1797 | i2d_X509_NAME(name,&p); | |
1798 | n+=2+j; | |
1799 | nl+=2+j; | |
1800 | } | |
1801 | else | |
1802 | { | |
1803 | d=p; | |
1804 | i2d_X509_NAME(name,&p); | |
1805 | j-=2; s2n(j,d); j+=2; | |
1806 | n+=j; | |
1807 | nl+=j; | |
1808 | } | |
1809 | } | |
1810 | } | |
1811 | /* else no CA names */ | |
1812 | p=(unsigned char *)&(buf->data[4+off]); | |
1813 | s2n(nl,p); | |
1814 | ||
1815 | d=(unsigned char *)buf->data; | |
1816 | *(d++)=SSL3_MT_CERTIFICATE_REQUEST; | |
1817 | l2n3(n,d); | |
1818 | ||
1819 | /* we should now have things packed up, so lets send | |
1820 | * it off */ | |
1821 | ||
1822 | s->init_num=n+4; | |
1823 | s->init_off=0; | |
de469ef2 DSH |
1824 | #ifdef NETSCAPE_HANG_BUG |
1825 | p=(unsigned char *)s->init_buf->data + s->init_num; | |
1826 | ||
1827 | /* do the header */ | |
1828 | *(p++)=SSL3_MT_SERVER_DONE; | |
1829 | *(p++)=0; | |
1830 | *(p++)=0; | |
1831 | *(p++)=0; | |
1832 | s->init_num += 4; | |
1833 | #endif | |
1834 | ||
e59659dc | 1835 | s->state = SSL3_ST_SW_CERT_REQ_B; |
d02b48c6 RE |
1836 | } |
1837 | ||
1838 | /* SSL3_ST_SW_CERT_REQ_B */ | |
1839 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
1840 | err: | |
1841 | return(-1); | |
1842 | } | |
1843 | ||
36d16f8e | 1844 | int ssl3_get_client_key_exchange(SSL *s) |
d02b48c6 RE |
1845 | { |
1846 | int i,al,ok; | |
1847 | long n; | |
52b8dad8 | 1848 | unsigned long alg_k; |
d02b48c6 | 1849 | unsigned char *p; |
bc36ee62 | 1850 | #ifndef OPENSSL_NO_RSA |
d02b48c6 | 1851 | RSA *rsa=NULL; |
d02b48c6 | 1852 | EVP_PKEY *pkey=NULL; |
79df9d62 | 1853 | #endif |
bc36ee62 | 1854 | #ifndef OPENSSL_NO_DH |
58964a49 | 1855 | BIGNUM *pub=NULL; |
d02b48c6 | 1856 | DH *dh_srvr; |
58964a49 | 1857 | #endif |
bc36ee62 | 1858 | #ifndef OPENSSL_NO_KRB5 |
52b8dad8 | 1859 | KSSL_ERR kssl_err; |
bc36ee62 | 1860 | #endif /* OPENSSL_NO_KRB5 */ |
d02b48c6 | 1861 | |
ea262260 BM |
1862 | #ifndef OPENSSL_NO_ECDH |
1863 | EC_KEY *srvr_ecdh = NULL; | |
1864 | EVP_PKEY *clnt_pub_pkey = NULL; | |
1865 | EC_POINT *clnt_ecpoint = NULL; | |
1866 | BN_CTX *bn_ctx = NULL; | |
1867 | #endif | |
1868 | ||
36d16f8e | 1869 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
1870 | SSL3_ST_SR_KEY_EXCH_A, |
1871 | SSL3_ST_SR_KEY_EXCH_B, | |
1872 | SSL3_MT_CLIENT_KEY_EXCHANGE, | |
73969585 | 1873 | 2048, /* ??? */ |
d02b48c6 RE |
1874 | &ok); |
1875 | ||
1876 | if (!ok) return((int)n); | |
48948d53 | 1877 | p=(unsigned char *)s->init_msg; |
d02b48c6 | 1878 | |
52b8dad8 | 1879 | alg_k=s->s3->tmp.new_cipher->algorithm_mkey; |
d02b48c6 | 1880 | |
bc36ee62 | 1881 | #ifndef OPENSSL_NO_RSA |
52b8dad8 | 1882 | if (alg_k & SSL_kRSA) |
d02b48c6 RE |
1883 | { |
1884 | /* FIX THIS UP EAY EAY EAY EAY */ | |
1885 | if (s->s3->tmp.use_rsa_tmp) | |
1886 | { | |
b56bce4f | 1887 | if ((s->cert != NULL) && (s->cert->rsa_tmp != NULL)) |
ca8e5b9b | 1888 | rsa=s->cert->rsa_tmp; |
d02b48c6 RE |
1889 | /* Don't do a callback because rsa_tmp should |
1890 | * be sent already */ | |
1891 | if (rsa == NULL) | |
1892 | { | |
58964a49 | 1893 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1894 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_RSA_PKEY); |
1895 | goto f_err; | |
1896 | ||
1897 | } | |
1898 | } | |
1899 | else | |
1900 | { | |
1901 | pkey=s->cert->pkeys[SSL_PKEY_RSA_ENC].privatekey; | |
1902 | if ( (pkey == NULL) || | |
1903 | (pkey->type != EVP_PKEY_RSA) || | |
1904 | (pkey->pkey.rsa == NULL)) | |
1905 | { | |
58964a49 | 1906 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
1907 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_RSA_CERTIFICATE); |
1908 | goto f_err; | |
1909 | } | |
1910 | rsa=pkey->pkey.rsa; | |
1911 | } | |
1912 | ||
7432d073 | 1913 | /* TLS and [incidentally] DTLS{0xFEFF} */ |
58964a49 RE |
1914 | if (s->version > SSL3_VERSION) |
1915 | { | |
1916 | n2s(p,i); | |
1917 | if (n != i+2) | |
1918 | { | |
1919 | if (!(s->options & SSL_OP_TLS_D5_BUG)) | |
1920 | { | |
1921 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_TLS_RSA_ENCRYPTED_VALUE_LENGTH_IS_WRONG); | |
1922 | goto err; | |
1923 | } | |
1924 | else | |
1925 | p-=2; | |
1926 | } | |
1927 | else | |
1928 | n=i; | |
1929 | } | |
1930 | ||
d02b48c6 | 1931 | i=RSA_private_decrypt((int)n,p,p,rsa,RSA_PKCS1_PADDING); |
58964a49 | 1932 | |
31bc51c8 BM |
1933 | al = -1; |
1934 | ||
d02b48c6 RE |
1935 | if (i != SSL_MAX_MASTER_KEY_LENGTH) |
1936 | { | |
1937 | al=SSL_AD_DECODE_ERROR; | |
02da5bcd | 1938 | /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); */ |
d02b48c6 RE |
1939 | } |
1940 | ||
31bc51c8 | 1941 | if ((al == -1) && !((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff)))) |
d02b48c6 | 1942 | { |
2c05c494 BM |
1943 | /* The premaster secret must contain the same version number as the |
1944 | * ClientHello to detect version rollback attacks (strangely, the | |
1945 | * protocol does not offer such protection for DH ciphersuites). | |
1946 | * However, buggy clients exist that send the negotiated protocol | |
93d8bfcd | 1947 | * version instead if the server does not support the requested |
2c05c494 BM |
1948 | * protocol version. |
1949 | * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. */ | |
1950 | if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) && | |
1951 | (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff)))) | |
1952 | { | |
1953 | al=SSL_AD_DECODE_ERROR; | |
02da5bcd BM |
1954 | /* SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BAD_PROTOCOL_VERSION_NUMBER); */ |
1955 | ||
1956 | /* The Klima-Pokorny-Rosa extension of Bleichenbacher's attack | |
1957 | * (http://eprint.iacr.org/2003/052/) exploits the version | |
1958 | * number check as a "bad version oracle" -- an alert would | |
1959 | * reveal that the plaintext corresponding to some ciphertext | |
1960 | * made up by the adversary is properly formatted except | |
1961 | * that the version number is wrong. To avoid such attacks, | |
1962 | * we should treat this just like any other decryption error. */ | |
2c05c494 | 1963 | } |
d02b48c6 | 1964 | } |
d02b48c6 | 1965 | |
31bc51c8 BM |
1966 | if (al != -1) |
1967 | { | |
31bc51c8 BM |
1968 | /* Some decryption failure -- use random value instead as countermeasure |
1969 | * against Bleichenbacher's attack on PKCS #1 v1.5 RSA padding | |
02da5bcd | 1970 | * (see RFC 2246, section 7.4.7.1). */ |
31bc51c8 BM |
1971 | ERR_clear_error(); |
1972 | i = SSL_MAX_MASTER_KEY_LENGTH; | |
1973 | p[0] = s->client_version >> 8; | |
1974 | p[1] = s->client_version & 0xff; | |
7c7667b8 NL |
1975 | if (RAND_pseudo_bytes(p+2, i-2) <= 0) /* should be RAND_bytes, but we cannot work around a failure */ |
1976 | goto err; | |
31bc51c8 BM |
1977 | } |
1978 | ||
d02b48c6 | 1979 | s->session->master_key_length= |
58964a49 | 1980 | s->method->ssl3_enc->generate_master_secret(s, |
d02b48c6 RE |
1981 | s->session->master_key, |
1982 | p,i); | |
43d60164 | 1983 | OPENSSL_cleanse(p,i); |
d02b48c6 RE |
1984 | } |
1985 | else | |
4c5fac4a | 1986 | #endif |
bc36ee62 | 1987 | #ifndef OPENSSL_NO_DH |
52b8dad8 | 1988 | if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) |
d02b48c6 | 1989 | { |
d02b48c6 RE |
1990 | n2s(p,i); |
1991 | if (n != i+2) | |
1992 | { | |
58964a49 | 1993 | if (!(s->options & SSL_OP_SSLEAY_080_CLIENT_DH_BUG)) |
d02b48c6 RE |
1994 | { |
1995 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DH_PUBLIC_VALUE_LENGTH_IS_WRONG); | |
1996 | goto err; | |
1997 | } | |
1998 | else | |
1999 | { | |
2000 | p-=2; | |
2001 | i=(int)n; | |
2002 | } | |
2003 | } | |
2004 | ||
2005 | if (n == 0L) /* the parameters are in the cert */ | |
2006 | { | |
58964a49 | 2007 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
2008 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_DECODE_DH_CERTS); |
2009 | goto f_err; | |
2010 | } | |
2011 | else | |
2012 | { | |
2013 | if (s->s3->tmp.dh == NULL) | |
2014 | { | |
58964a49 | 2015 | al=SSL_AD_HANDSHAKE_FAILURE; |
d02b48c6 RE |
2016 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_DH_KEY); |
2017 | goto f_err; | |
2018 | } | |
2019 | else | |
2020 | dh_srvr=s->s3->tmp.dh; | |
2021 | } | |
2022 | ||
2023 | pub=BN_bin2bn(p,i,NULL); | |
2024 | if (pub == NULL) | |
2025 | { | |
2026 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_BN_LIB); | |
2027 | goto err; | |
2028 | } | |
58964a49 | 2029 | |
d02b48c6 RE |
2030 | i=DH_compute_key(p,pub,dh_srvr); |
2031 | ||
2032 | if (i <= 0) | |
2033 | { | |
2034 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); | |
2035 | goto err; | |
2036 | } | |
2037 | ||
2038 | DH_free(s->s3->tmp.dh); | |
2039 | s->s3->tmp.dh=NULL; | |
2040 | ||
2041 | BN_clear_free(pub); | |
2042 | pub=NULL; | |
2043 | s->session->master_key_length= | |
58964a49 | 2044 | s->method->ssl3_enc->generate_master_secret(s, |
d02b48c6 | 2045 | s->session->master_key,p,i); |
43d60164 | 2046 | OPENSSL_cleanse(p,i); |
d02b48c6 RE |
2047 | } |
2048 | else | |
2049 | #endif | |
bc36ee62 | 2050 | #ifndef OPENSSL_NO_KRB5 |
52b8dad8 BM |
2051 | if (alg_k & SSL_kKRB5) |
2052 | { | |
2053 | krb5_error_code krb5rc; | |
2a1ef754 RL |
2054 | krb5_data enc_ticket; |
2055 | krb5_data authenticator; | |
2056 | krb5_data enc_pms; | |
52b8dad8 | 2057 | KSSL_CTX *kssl_ctx = s->kssl_ctx; |
2a1ef754 RL |
2058 | EVP_CIPHER_CTX ciph_ctx; |
2059 | EVP_CIPHER *enc = NULL; | |
2060 | unsigned char iv[EVP_MAX_IV_LENGTH]; | |
acdf4afb | 2061 | unsigned char pms[SSL_MAX_MASTER_KEY_LENGTH |
52b8dad8 BM |
2062 | + EVP_MAX_BLOCK_LENGTH]; |
2063 | int padl, outl; | |
2a1ef754 RL |
2064 | krb5_timestamp authtime = 0; |
2065 | krb5_ticket_times ttimes; | |
f9b3bff6 | 2066 | |
de941e28 DSH |
2067 | EVP_CIPHER_CTX_init(&ciph_ctx); |
2068 | ||
52b8dad8 | 2069 | if (!kssl_ctx) kssl_ctx = kssl_ctx_new(); |
2a1ef754 RL |
2070 | |
2071 | n2s(p,i); | |
2072 | enc_ticket.length = i; | |
9e5790ce NL |
2073 | |
2074 | if (n < enc_ticket.length + 6) | |
2075 | { | |
2076 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2077 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2078 | goto err; | |
2079 | } | |
2080 | ||
0b4c91c0 | 2081 | enc_ticket.data = (char *)p; |
2a1ef754 RL |
2082 | p+=enc_ticket.length; |
2083 | ||
2084 | n2s(p,i); | |
2085 | authenticator.length = i; | |
9e5790ce NL |
2086 | |
2087 | if (n < enc_ticket.length + authenticator.length + 6) | |
2088 | { | |
2089 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2090 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2091 | goto err; | |
2092 | } | |
2093 | ||
0b4c91c0 | 2094 | authenticator.data = (char *)p; |
2a1ef754 RL |
2095 | p+=authenticator.length; |
2096 | ||
2097 | n2s(p,i); | |
2098 | enc_pms.length = i; | |
0b4c91c0 | 2099 | enc_pms.data = (char *)p; |
2a1ef754 RL |
2100 | p+=enc_pms.length; |
2101 | ||
c046fffa LJ |
2102 | /* Note that the length is checked again below, |
2103 | ** after decryption | |
2104 | */ | |
dd7ab82e | 2105 | if(enc_pms.length > sizeof pms) |
c046fffa LJ |
2106 | { |
2107 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2108 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2109 | goto err; | |
2110 | } | |
2111 | ||
0858b71b DSH |
2112 | if (n != (long)(enc_ticket.length + authenticator.length + |
2113 | enc_pms.length + 6)) | |
2a1ef754 RL |
2114 | { |
2115 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2116 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2117 | goto err; | |
2118 | } | |
2119 | ||
52b8dad8 | 2120 | if ((krb5rc = kssl_sget_tkt(kssl_ctx, &enc_ticket, &ttimes, |
2a1ef754 | 2121 | &kssl_err)) != 0) |
52b8dad8 | 2122 | { |
f9b3bff6 | 2123 | #ifdef KSSL_DEBUG |
52b8dad8 BM |
2124 | printf("kssl_sget_tkt rtn %d [%d]\n", |
2125 | krb5rc, kssl_err.reason); | |
2126 | if (kssl_err.text) | |
2127 | printf("kssl_err text= %s\n", kssl_err.text); | |
f9b3bff6 | 2128 | #endif /* KSSL_DEBUG */ |
52b8dad8 BM |
2129 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2130 | kssl_err.reason); | |
2131 | goto err; | |
2132 | } | |
f9b3bff6 | 2133 | |
2a1ef754 RL |
2134 | /* Note: no authenticator is not considered an error, |
2135 | ** but will return authtime == 0. | |
2136 | */ | |
2137 | if ((krb5rc = kssl_check_authent(kssl_ctx, &authenticator, | |
2138 | &authtime, &kssl_err)) != 0) | |
2139 | { | |
2140 | #ifdef KSSL_DEBUG | |
52b8dad8 BM |
2141 | printf("kssl_check_authent rtn %d [%d]\n", |
2142 | krb5rc, kssl_err.reason); | |
2143 | if (kssl_err.text) | |
2144 | printf("kssl_err text= %s\n", kssl_err.text); | |
2a1ef754 | 2145 | #endif /* KSSL_DEBUG */ |
52b8dad8 BM |
2146 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2147 | kssl_err.reason); | |
2148 | goto err; | |
2a1ef754 RL |
2149 | } |
2150 | ||
2151 | if ((krb5rc = kssl_validate_times(authtime, &ttimes)) != 0) | |
2152 | { | |
aa4ce731 | 2153 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, krb5rc); |
52b8dad8 | 2154 | goto err; |
2a1ef754 RL |
2155 | } |
2156 | ||
f9b3bff6 | 2157 | #ifdef KSSL_DEBUG |
52b8dad8 | 2158 | kssl_ctx_show(kssl_ctx); |
f9b3bff6 RL |
2159 | #endif /* KSSL_DEBUG */ |
2160 | ||
2a1ef754 | 2161 | enc = kssl_map_enc(kssl_ctx->enctype); |
52b8dad8 BM |
2162 | if (enc == NULL) |
2163 | goto err; | |
882e8912 | 2164 | |
54a656ef | 2165 | memset(iv, 0, sizeof iv); /* per RFC 1510 */ |
2a1ef754 | 2166 | |
db6a87d8 | 2167 | if (!EVP_DecryptInit_ex(&ciph_ctx,enc,NULL,kssl_ctx->key,iv)) |
acdf4afb RL |
2168 | { |
2169 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2170 | SSL_R_DECRYPTION_FAILED); | |
2171 | goto err; | |
2172 | } | |
2173 | if (!EVP_DecryptUpdate(&ciph_ctx, pms,&outl, | |
0b4c91c0 | 2174 | (unsigned char *)enc_pms.data, enc_pms.length)) |
acdf4afb RL |
2175 | { |
2176 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2177 | SSL_R_DECRYPTION_FAILED); | |
2178 | goto err; | |
2179 | } | |
2a1ef754 RL |
2180 | if (outl > SSL_MAX_MASTER_KEY_LENGTH) |
2181 | { | |
2182 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2183 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2184 | goto err; | |
2185 | } | |
581f1c84 | 2186 | if (!EVP_DecryptFinal_ex(&ciph_ctx,&(pms[outl]),&padl)) |
acdf4afb RL |
2187 | { |
2188 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2189 | SSL_R_DECRYPTION_FAILED); | |
2190 | goto err; | |
2191 | } | |
2a1ef754 RL |
2192 | outl += padl; |
2193 | if (outl > SSL_MAX_MASTER_KEY_LENGTH) | |
2194 | { | |
2195 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2196 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2197 | goto err; | |
2198 | } | |
cbb92dfa RL |
2199 | if (!((p[0] == (s->client_version>>8)) && (p[1] == (s->client_version & 0xff)))) |
2200 | { | |
2201 | /* The premaster secret must contain the same version number as the | |
2202 | * ClientHello to detect version rollback attacks (strangely, the | |
2203 | * protocol does not offer such protection for DH ciphersuites). | |
2204 | * However, buggy clients exist that send random bytes instead of | |
2205 | * the protocol version. | |
2206 | * If SSL_OP_TLS_ROLLBACK_BUG is set, tolerate such clients. | |
2207 | * (Perhaps we should have a separate BUG value for the Kerberos cipher) | |
2208 | */ | |
2209 | if (!((s->options & SSL_OP_TLS_ROLLBACK_BUG) && | |
2210 | (p[0] == (s->version>>8)) && (p[1] == (s->version & 0xff)))) | |
52b8dad8 | 2211 | { |
cbb92dfa RL |
2212 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2213 | SSL_AD_DECODE_ERROR); | |
2214 | goto err; | |
2215 | } | |
2216 | } | |
2217 | ||
2a1ef754 RL |
2218 | EVP_CIPHER_CTX_cleanup(&ciph_ctx); |
2219 | ||
52b8dad8 BM |
2220 | s->session->master_key_length= |
2221 | s->method->ssl3_enc->generate_master_secret(s, | |
2222 | s->session->master_key, pms, outl); | |
2a1ef754 | 2223 | |
52b8dad8 BM |
2224 | if (kssl_ctx->client_princ) |
2225 | { | |
2226 | size_t len = strlen(kssl_ctx->client_princ); | |
2227 | if ( len < SSL_MAX_KRB5_PRINCIPAL_LENGTH ) | |
2228 | { | |
2229 | s->session->krb5_client_princ_len = len; | |
2230 | memcpy(s->session->krb5_client_princ,kssl_ctx->client_princ,len); | |
2231 | } | |
2232 | } | |
882e8912 RL |
2233 | |
2234 | ||
52b8dad8 | 2235 | /* Was doing kssl_ctx_free() here, |
2a1ef754 | 2236 | ** but it caused problems for apache. |
52b8dad8 BM |
2237 | ** kssl_ctx = kssl_ctx_free(kssl_ctx); |
2238 | ** if (s->kssl_ctx) s->kssl_ctx = NULL; | |
2239 | */ | |
2240 | } | |
f9b3bff6 | 2241 | else |
bc36ee62 | 2242 | #endif /* OPENSSL_NO_KRB5 */ |
ea262260 BM |
2243 | |
2244 | #ifndef OPENSSL_NO_ECDH | |
52b8dad8 | 2245 | if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) |
ea262260 BM |
2246 | { |
2247 | int ret = 1; | |
968766ca | 2248 | int field_size = 0; |
9dd84053 NL |
2249 | const EC_KEY *tkey; |
2250 | const EC_GROUP *group; | |
2251 | const BIGNUM *priv_key; | |
ea262260 | 2252 | |
52b8dad8 | 2253 | /* initialize structures for server's ECDH key pair */ |
ea262260 BM |
2254 | if ((srvr_ecdh = EC_KEY_new()) == NULL) |
2255 | { | |
52b8dad8 | 2256 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
ea262260 | 2257 | ERR_R_MALLOC_FAILURE); |
52b8dad8 | 2258 | goto err; |
ea262260 BM |
2259 | } |
2260 | ||
2261 | /* Let's get server private key and group information */ | |
52b8dad8 | 2262 | if (alg_k & (SSL_kECDHr|SSL_kECDHe)) |
ea262260 | 2263 | { |
52b8dad8 | 2264 | /* use the certificate */ |
feaaf1db | 2265 | tkey = s->cert->pkeys[SSL_PKEY_ECC].privatekey->pkey.ec; |
ea262260 BM |
2266 | } |
2267 | else | |
2268 | { | |
2269 | /* use the ephermeral values we saved when | |
2270 | * generating the ServerKeyExchange msg. | |
2271 | */ | |
9dd84053 NL |
2272 | tkey = s->s3->tmp.ecdh; |
2273 | } | |
2274 | ||
2275 | group = EC_KEY_get0_group(tkey); | |
2276 | priv_key = EC_KEY_get0_private_key(tkey); | |
2277 | ||
2278 | if (!EC_KEY_set_group(srvr_ecdh, group) || | |
2279 | !EC_KEY_set_private_key(srvr_ecdh, priv_key)) | |
2280 | { | |
2281 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2282 | ERR_R_EC_LIB); | |
2283 | goto err; | |
ea262260 BM |
2284 | } |
2285 | ||
2286 | /* Let's get client's public key */ | |
9dd84053 | 2287 | if ((clnt_ecpoint = EC_POINT_new(group)) == NULL) |
ea262260 BM |
2288 | { |
2289 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2290 | ERR_R_MALLOC_FAILURE); | |
2291 | goto err; | |
2292 | } | |
2293 | ||
52b8dad8 BM |
2294 | if (n == 0L) |
2295 | { | |
ea262260 BM |
2296 | /* Client Publickey was in Client Certificate */ |
2297 | ||
52b8dad8 | 2298 | if (alg_k & SSL_kEECDH) |
ea262260 BM |
2299 | { |
2300 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2301 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_MISSING_TMP_ECDH_KEY); | |
2302 | goto f_err; | |
2303 | } | |
52b8dad8 | 2304 | if (((clnt_pub_pkey=X509_get_pubkey(s->session->peer)) |
ea262260 | 2305 | == NULL) || |
5488bb61 | 2306 | (clnt_pub_pkey->type != EVP_PKEY_EC)) |
52b8dad8 | 2307 | { |
ea262260 BM |
2308 | /* XXX: For now, we do not support client |
2309 | * authentication using ECDH certificates | |
2310 | * so this branch (n == 0L) of the code is | |
2311 | * never executed. When that support is | |
2312 | * added, we ought to ensure the key | |
2313 | * received in the certificate is | |
2314 | * authorized for key agreement. | |
2315 | * ECDH_compute_key implicitly checks that | |
2316 | * the two ECDH shares are for the same | |
2317 | * group. | |
2318 | */ | |
52b8dad8 BM |
2319 | al=SSL_AD_HANDSHAKE_FAILURE; |
2320 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
ea262260 | 2321 | SSL_R_UNABLE_TO_DECODE_ECDH_CERTS); |
52b8dad8 BM |
2322 | goto f_err; |
2323 | } | |
ea262260 | 2324 | |
8c5a2bd6 NL |
2325 | if (EC_POINT_copy(clnt_ecpoint, |
2326 | EC_KEY_get0_public_key(clnt_pub_pkey->pkey.ec)) == 0) | |
2327 | { | |
2328 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2329 | ERR_R_EC_LIB); | |
2330 | goto err; | |
2331 | } | |
52b8dad8 BM |
2332 | ret = 2; /* Skip certificate verify processing */ |
2333 | } | |
2334 | else | |
2335 | { | |
ea262260 BM |
2336 | /* Get client's public key from encoded point |
2337 | * in the ClientKeyExchange message. | |
2338 | */ | |
2339 | if ((bn_ctx = BN_CTX_new()) == NULL) | |
2340 | { | |
2341 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2342 | ERR_R_MALLOC_FAILURE); | |
2343 | goto err; | |
2344 | } | |
2345 | ||
52b8dad8 BM |
2346 | /* Get encoded point length */ |
2347 | i = *p; | |
ea262260 | 2348 | p += 1; |
52b8dad8 | 2349 | if (EC_POINT_oct2point(group, |
ea262260 BM |
2350 | clnt_ecpoint, p, i, bn_ctx) == 0) |
2351 | { | |
2352 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2353 | ERR_R_EC_LIB); | |
2354 | goto err; | |
2355 | } | |
52b8dad8 BM |
2356 | /* p is pointing to somewhere in the buffer |
2357 | * currently, so set it to the start | |
2358 | */ | |
2359 | p=(unsigned char *)s->init_buf->data; | |
2360 | } | |
ea262260 BM |
2361 | |
2362 | /* Compute the shared pre-master secret */ | |
9dd84053 | 2363 | field_size = EC_GROUP_get_degree(group); |
968766ca BM |
2364 | if (field_size <= 0) |
2365 | { | |
2366 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2367 | ERR_R_ECDH_LIB); | |
2368 | goto err; | |
2369 | } | |
d56349a2 | 2370 | i = ECDH_compute_key(p, (field_size+7)/8, clnt_ecpoint, srvr_ecdh, NULL); |
52b8dad8 BM |
2371 | if (i <= 0) |
2372 | { | |
2373 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
ea262260 | 2374 | ERR_R_ECDH_LIB); |
52b8dad8 BM |
2375 | goto err; |
2376 | } | |
ea262260 BM |
2377 | |
2378 | EVP_PKEY_free(clnt_pub_pkey); | |
2379 | EC_POINT_free(clnt_ecpoint); | |
2380 | if (srvr_ecdh != NULL) | |
ea262260 | 2381 | EC_KEY_free(srvr_ecdh); |
ea262260 BM |
2382 | BN_CTX_free(bn_ctx); |
2383 | ||
2384 | /* Compute the master secret */ | |
52b8dad8 | 2385 | s->session->master_key_length = s->method->ssl3_enc-> \ |
ea262260 BM |
2386 | generate_master_secret(s, s->session->master_key, p, i); |
2387 | ||
52b8dad8 BM |
2388 | OPENSSL_cleanse(p, i); |
2389 | return (ret); | |
ea262260 BM |
2390 | } |
2391 | else | |
ddac1974 NL |
2392 | #endif |
2393 | #ifndef OPENSSL_NO_PSK | |
52b8dad8 | 2394 | if (alg_k & SSL_kPSK) |
ddac1974 NL |
2395 | { |
2396 | unsigned char *t = NULL; | |
2397 | unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; | |
2398 | unsigned int pre_ms_len = 0, psk_len = 0; | |
2399 | int psk_err = 1; | |
2400 | char tmp_id[PSK_MAX_IDENTITY_LEN+1]; | |
2401 | ||
2402 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2403 | ||
2404 | n2s(p,i); | |
2405 | if (n != i+2) | |
2406 | { | |
2407 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2408 | SSL_R_LENGTH_MISMATCH); | |
2409 | goto psk_err; | |
2410 | } | |
2411 | if (i > PSK_MAX_IDENTITY_LEN) | |
2412 | { | |
2413 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2414 | SSL_R_DATA_LENGTH_TOO_LONG); | |
2415 | goto psk_err; | |
2416 | } | |
2417 | if (s->psk_server_callback == NULL) | |
2418 | { | |
2419 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2420 | SSL_R_PSK_NO_SERVER_CB); | |
2421 | goto psk_err; | |
2422 | } | |
2423 | ||
2424 | /* Create guaranteed NULL-terminated identity | |
2425 | * string for the callback */ | |
2426 | memcpy(tmp_id, p, i); | |
2427 | memset(tmp_id+i, 0, PSK_MAX_IDENTITY_LEN+1-i); | |
2428 | psk_len = s->psk_server_callback(s, tmp_id, | |
2429 | psk_or_pre_ms, sizeof(psk_or_pre_ms)); | |
2430 | OPENSSL_cleanse(tmp_id, PSK_MAX_IDENTITY_LEN+1); | |
2431 | ||
2432 | if (psk_len > PSK_MAX_PSK_LEN) | |
2433 | { | |
2434 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2435 | ERR_R_INTERNAL_ERROR); | |
2436 | goto psk_err; | |
2437 | } | |
2438 | else if (psk_len == 0) | |
2439 | { | |
2440 | /* PSK related to the given identity not found */ | |
2441 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2442 | SSL_R_PSK_IDENTITY_NOT_FOUND); | |
2443 | al=SSL_AD_UNKNOWN_PSK_IDENTITY; | |
2444 | goto psk_err; | |
2445 | } | |
2446 | ||
2447 | /* create PSK pre_master_secret */ | |
2448 | pre_ms_len=2+psk_len+2+psk_len; | |
2449 | t = psk_or_pre_ms; | |
2450 | memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); | |
2451 | s2n(psk_len, t); | |
2452 | memset(t, 0, psk_len); | |
2453 | t+=psk_len; | |
2454 | s2n(psk_len, t); | |
2455 | ||
2456 | if (s->session->psk_identity != NULL) | |
2457 | OPENSSL_free(s->session->psk_identity); | |
07ef6129 | 2458 | s->session->psk_identity = BUF_strdup((char *)p); |
ddac1974 NL |
2459 | if (s->session->psk_identity == NULL) |
2460 | { | |
2461 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2462 | ERR_R_MALLOC_FAILURE); | |
2463 | goto psk_err; | |
2464 | } | |
2465 | ||
2466 | if (s->session->psk_identity_hint != NULL) | |
2467 | OPENSSL_free(s->session->psk_identity_hint); | |
2468 | s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); | |
2469 | if (s->ctx->psk_identity_hint != NULL && | |
2470 | s->session->psk_identity_hint == NULL) | |
2471 | { | |
2472 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, | |
2473 | ERR_R_MALLOC_FAILURE); | |
2474 | goto psk_err; | |
2475 | } | |
2476 | ||
2477 | s->session->master_key_length= | |
2478 | s->method->ssl3_enc->generate_master_secret(s, | |
2479 | s->session->master_key, psk_or_pre_ms, pre_ms_len); | |
2480 | psk_err = 0; | |
2481 | psk_err: | |
2482 | OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); | |
52b8dad8 BM |
2483 | if (psk_err != 0) |
2484 | goto f_err; | |
ddac1974 NL |
2485 | } |
2486 | else | |
ea262260 | 2487 | #endif |
0e1dba93 DSH |
2488 | if (alg_k & SSL_kGOST) |
2489 | { | |
2490 | EVP_PKEY_CTX *pkey_ctx; | |
2491 | unsigned char premaster_secret[32]; | |
2492 | size_t outlen; | |
2493 | ||
2494 | /* Get our certificate privatec key*/ | |
2495 | pkey_ctx = EVP_PKEY_CTX_new(s->cert->key->privatekey,NULL); | |
2496 | EVP_PKEY_decrypt_init(pkey_ctx); | |
2497 | /* Decrypt session key */ | |
2498 | if ((*p!=( V_ASN1_SEQUENCE| V_ASN1_CONSTRUCTED)) || p[1]!=0x81 ) | |
2499 | { | |
2500 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED); | |
2501 | goto err; | |
2502 | } | |
2503 | if (EVP_PKEY_decrypt(pkey_ctx,premaster_secret,&outlen,p+3,p[2]) <0) | |
2504 | ||
2505 | { | |
2506 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE,SSL_R_DECRYPTION_FAILED); | |
2507 | goto err; | |
2508 | } | |
2509 | /* Generate master secret */ | |
2510 | EVP_PKEY_CTX_free(pkey_ctx); | |
2511 | s->session->master_key_length= | |
2512 | s->method->ssl3_enc->generate_master_secret(s, | |
2513 | s->session->master_key,premaster_secret,32); | |
2514 | ||
2515 | } | |
2516 | else | |
d02b48c6 | 2517 | { |
58964a49 | 2518 | al=SSL_AD_HANDSHAKE_FAILURE; |
2a1ef754 RL |
2519 | SSLerr(SSL_F_SSL3_GET_CLIENT_KEY_EXCHANGE, |
2520 | SSL_R_UNKNOWN_CIPHER_TYPE); | |
d02b48c6 RE |
2521 | goto f_err; |
2522 | } | |
2523 | ||
2524 | return(1); | |
2525 | f_err: | |
2526 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
ea262260 | 2527 | #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_RSA) || !defined(OPENSSL_NO_ECDH) |
d02b48c6 | 2528 | err: |
ea262260 | 2529 | #endif |
d020e701 | 2530 | #ifndef OPENSSL_NO_ECDH |
ea262260 BM |
2531 | EVP_PKEY_free(clnt_pub_pkey); |
2532 | EC_POINT_free(clnt_ecpoint); | |
2533 | if (srvr_ecdh != NULL) | |
ea262260 | 2534 | EC_KEY_free(srvr_ecdh); |
ea262260 | 2535 | BN_CTX_free(bn_ctx); |
58964a49 | 2536 | #endif |
d02b48c6 RE |
2537 | return(-1); |
2538 | } | |
2539 | ||
36d16f8e | 2540 | int ssl3_get_cert_verify(SSL *s) |
d02b48c6 RE |
2541 | { |
2542 | EVP_PKEY *pkey=NULL; | |
2543 | unsigned char *p; | |
2544 | int al,ok,ret=0; | |
2545 | long n; | |
2546 | int type=0,i,j; | |
2547 | X509 *peer; | |
2548 | ||
36d16f8e | 2549 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
2550 | SSL3_ST_SR_CERT_VRFY_A, |
2551 | SSL3_ST_SR_CERT_VRFY_B, | |
2552 | -1, | |
00a357ab | 2553 | 514, /* 514? */ |
d02b48c6 RE |
2554 | &ok); |
2555 | ||
2556 | if (!ok) return((int)n); | |
2557 | ||
2558 | if (s->session->peer != NULL) | |
2559 | { | |
2560 | peer=s->session->peer; | |
2561 | pkey=X509_get_pubkey(peer); | |
2562 | type=X509_certificate_type(peer,pkey); | |
2563 | } | |
2564 | else | |
2565 | { | |
2566 | peer=NULL; | |
2567 | pkey=NULL; | |
2568 | } | |
2569 | ||
2570 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_VERIFY) | |
2571 | { | |
2572 | s->s3->tmp.reuse_message=1; | |
2573 | if ((peer != NULL) && (type | EVP_PKT_SIGN)) | |
2574 | { | |
58964a49 | 2575 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 | 2576 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_MISSING_VERIFY_MESSAGE); |
d02b48c6 RE |
2577 | goto f_err; |
2578 | } | |
2579 | ret=1; | |
2580 | goto end; | |
2581 | } | |
2582 | ||
2583 | if (peer == NULL) | |
2584 | { | |
2585 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_NO_CLIENT_CERT_RECEIVED); | |
58964a49 | 2586 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
2587 | goto f_err; |
2588 | } | |
2589 | ||
2590 | if (!(type & EVP_PKT_SIGN)) | |
2591 | { | |
2592 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_SIGNATURE_FOR_NON_SIGNING_CERTIFICATE); | |
58964a49 | 2593 | al=SSL_AD_ILLEGAL_PARAMETER; |
d02b48c6 RE |
2594 | goto f_err; |
2595 | } | |
2596 | ||
2597 | if (s->s3->change_cipher_spec) | |
2598 | { | |
2599 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_CCS_RECEIVED_EARLY); | |
58964a49 | 2600 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
2601 | goto f_err; |
2602 | } | |
2603 | ||
2604 | /* we now have a signature that we need to verify */ | |
48948d53 | 2605 | p=(unsigned char *)s->init_msg; |
0e1dba93 DSH |
2606 | /* Check for broken implementations of GOST ciphersuites */ |
2607 | /* If key is GOST and n is exactly 64, it is bare | |
2608 | * signature without length field */ | |
2609 | if (n==64 && (pkey->type==NID_id_GostR3410_94 || | |
2610 | pkey->type == NID_id_GostR3410_2001) ) | |
d02b48c6 | 2611 | { |
0e1dba93 DSH |
2612 | i=64; |
2613 | } | |
2614 | else | |
2615 | { | |
2616 | n2s(p,i); | |
2617 | n-=2; | |
2618 | if (i > n) | |
2619 | { | |
2620 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_LENGTH_MISMATCH); | |
2621 | al=SSL_AD_DECODE_ERROR; | |
2622 | goto f_err; | |
2623 | } | |
2624 | } | |
d02b48c6 RE |
2625 | j=EVP_PKEY_size(pkey); |
2626 | if ((i > j) || (n > j) || (n <= 0)) | |
2627 | { | |
2628 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_WRONG_SIGNATURE_SIZE); | |
58964a49 | 2629 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
2630 | goto f_err; |
2631 | } | |
2632 | ||
bc36ee62 | 2633 | #ifndef OPENSSL_NO_RSA |
d02b48c6 RE |
2634 | if (pkey->type == EVP_PKEY_RSA) |
2635 | { | |
f2d9a32c | 2636 | i=RSA_verify(NID_md5_sha1, s->s3->tmp.cert_verify_md, |
1c80019a DSH |
2637 | MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, p, i, |
2638 | pkey->pkey.rsa); | |
d02b48c6 RE |
2639 | if (i < 0) |
2640 | { | |
58964a49 | 2641 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
2642 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_DECRYPT); |
2643 | goto f_err; | |
2644 | } | |
1c80019a | 2645 | if (i == 0) |
d02b48c6 | 2646 | { |
58964a49 | 2647 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
2648 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_RSA_SIGNATURE); |
2649 | goto f_err; | |
2650 | } | |
2651 | } | |
2652 | else | |
2653 | #endif | |
bc36ee62 | 2654 | #ifndef OPENSSL_NO_DSA |
d02b48c6 RE |
2655 | if (pkey->type == EVP_PKEY_DSA) |
2656 | { | |
58964a49 | 2657 | j=DSA_verify(pkey->save_type, |
f2d9a32c | 2658 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]), |
d02b48c6 RE |
2659 | SHA_DIGEST_LENGTH,p,i,pkey->pkey.dsa); |
2660 | if (j <= 0) | |
2661 | { | |
2662 | /* bad signature */ | |
58964a49 | 2663 | al=SSL_AD_DECRYPT_ERROR; |
d02b48c6 RE |
2664 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,SSL_R_BAD_DSA_SIGNATURE); |
2665 | goto f_err; | |
2666 | } | |
2667 | } | |
2668 | else | |
ea262260 BM |
2669 | #endif |
2670 | #ifndef OPENSSL_NO_ECDSA | |
5488bb61 | 2671 | if (pkey->type == EVP_PKEY_EC) |
ea262260 BM |
2672 | { |
2673 | j=ECDSA_verify(pkey->save_type, | |
2674 | &(s->s3->tmp.cert_verify_md[MD5_DIGEST_LENGTH]), | |
9dd84053 | 2675 | SHA_DIGEST_LENGTH,p,i,pkey->pkey.ec); |
ea262260 BM |
2676 | if (j <= 0) |
2677 | { | |
2678 | /* bad signature */ | |
2679 | al=SSL_AD_DECRYPT_ERROR; | |
2680 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, | |
2681 | SSL_R_BAD_ECDSA_SIGNATURE); | |
2682 | goto f_err; | |
2683 | } | |
2684 | } | |
2685 | else | |
d02b48c6 | 2686 | #endif |
0e1dba93 DSH |
2687 | if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) |
2688 | { unsigned char signature[64]; | |
2689 | int idx; | |
2690 | EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new(pkey,NULL); | |
2691 | EVP_PKEY_verify_init(pctx); | |
2692 | if (i!=64) { | |
2693 | fprintf(stderr,"GOST signature length is %d",i); | |
2694 | } | |
2695 | for (idx=0;idx<64;idx++) { | |
2696 | signature[63-idx]=p[idx]; | |
2697 | } | |
2698 | j=EVP_PKEY_verify(pctx,signature,64,s->s3->tmp.cert_verify_md,32); | |
2699 | EVP_PKEY_CTX_free(pctx); | |
2700 | if (j<=0) | |
2701 | { | |
2702 | al=SSL_AD_DECRYPT_ERROR; | |
2703 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY, | |
2704 | SSL_R_BAD_ECDSA_SIGNATURE); | |
2705 | goto f_err; | |
2706 | } | |
2707 | } | |
2708 | else | |
d02b48c6 | 2709 | { |
5277d7cb | 2710 | SSLerr(SSL_F_SSL3_GET_CERT_VERIFY,ERR_R_INTERNAL_ERROR); |
58964a49 | 2711 | al=SSL_AD_UNSUPPORTED_CERTIFICATE; |
d02b48c6 RE |
2712 | goto f_err; |
2713 | } | |
2714 | ||
2715 | ||
2716 | ret=1; | |
2717 | if (0) | |
2718 | { | |
2719 | f_err: | |
2720 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
2721 | } | |
2722 | end: | |
a8236c8c | 2723 | EVP_PKEY_free(pkey); |
d02b48c6 RE |
2724 | return(ret); |
2725 | } | |
2726 | ||
36d16f8e | 2727 | int ssl3_get_client_certificate(SSL *s) |
d02b48c6 RE |
2728 | { |
2729 | int i,ok,al,ret= -1; | |
2730 | X509 *x=NULL; | |
2731 | unsigned long l,nc,llen,n; | |
875a644a RL |
2732 | const unsigned char *p,*q; |
2733 | unsigned char *d; | |
f73e07cf | 2734 | STACK_OF(X509) *sk=NULL; |
d02b48c6 | 2735 | |
36d16f8e | 2736 | n=s->method->ssl_get_message(s, |
d02b48c6 RE |
2737 | SSL3_ST_SR_CERT_A, |
2738 | SSL3_ST_SR_CERT_B, | |
2739 | -1, | |
c0f5dd07 | 2740 | s->max_cert_list, |
d02b48c6 RE |
2741 | &ok); |
2742 | ||
2743 | if (!ok) return((int)n); | |
2744 | ||
2745 | if (s->s3->tmp.message_type == SSL3_MT_CLIENT_KEY_EXCHANGE) | |
2746 | { | |
2747 | if ( (s->verify_mode & SSL_VERIFY_PEER) && | |
2748 | (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) | |
2749 | { | |
2750 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
58964a49 RE |
2751 | al=SSL_AD_HANDSHAKE_FAILURE; |
2752 | goto f_err; | |
2753 | } | |
47134b78 | 2754 | /* If tls asked for a client cert, the client must return a 0 list */ |
58964a49 RE |
2755 | if ((s->version > SSL3_VERSION) && s->s3->tmp.cert_request) |
2756 | { | |
2757 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_TLS_PEER_DID_NOT_RESPOND_WITH_CERTIFICATE_LIST); | |
2758 | al=SSL_AD_UNEXPECTED_MESSAGE; | |
d02b48c6 RE |
2759 | goto f_err; |
2760 | } | |
2761 | s->s3->tmp.reuse_message=1; | |
2762 | return(1); | |
2763 | } | |
2764 | ||
2765 | if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) | |
2766 | { | |
58964a49 | 2767 | al=SSL_AD_UNEXPECTED_MESSAGE; |
d02b48c6 RE |
2768 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_WRONG_MESSAGE_TYPE); |
2769 | goto f_err; | |
2770 | } | |
875a644a | 2771 | p=d=(unsigned char *)s->init_msg; |
d02b48c6 | 2772 | |
f73e07cf | 2773 | if ((sk=sk_X509_new_null()) == NULL) |
d02b48c6 RE |
2774 | { |
2775 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
2776 | goto err; | |
2777 | } | |
2778 | ||
2779 | n2l3(p,llen); | |
2780 | if (llen+3 != n) | |
2781 | { | |
58964a49 | 2782 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
2783 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_LENGTH_MISMATCH); |
2784 | goto f_err; | |
2785 | } | |
2786 | for (nc=0; nc<llen; ) | |
2787 | { | |
2788 | n2l3(p,l); | |
2789 | if ((l+nc+3) > llen) | |
2790 | { | |
58964a49 | 2791 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
2792 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); |
2793 | goto f_err; | |
2794 | } | |
2795 | ||
2796 | q=p; | |
2797 | x=d2i_X509(NULL,&p,l); | |
2798 | if (x == NULL) | |
2799 | { | |
2800 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_ASN1_LIB); | |
2801 | goto err; | |
2802 | } | |
2803 | if (p != (q+l)) | |
2804 | { | |
58964a49 | 2805 | al=SSL_AD_DECODE_ERROR; |
d02b48c6 RE |
2806 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); |
2807 | goto f_err; | |
2808 | } | |
f73e07cf | 2809 | if (!sk_X509_push(sk,x)) |
d02b48c6 RE |
2810 | { |
2811 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,ERR_R_MALLOC_FAILURE); | |
2812 | goto err; | |
2813 | } | |
2814 | x=NULL; | |
2815 | nc+=l+3; | |
2816 | } | |
2817 | ||
f73e07cf | 2818 | if (sk_X509_num(sk) <= 0) |
d02b48c6 | 2819 | { |
58964a49 RE |
2820 | /* TLS does not mind 0 certs returned */ |
2821 | if (s->version == SSL3_VERSION) | |
2822 | { | |
2823 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2824 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATES_RETURNED); | |
2825 | goto f_err; | |
2826 | } | |
2827 | /* Fail for TLS only if we required a certificate */ | |
2828 | else if ((s->verify_mode & SSL_VERIFY_PEER) && | |
2829 | (s->verify_mode & SSL_VERIFY_FAIL_IF_NO_PEER_CERT)) | |
2830 | { | |
2831 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_PEER_DID_NOT_RETURN_A_CERTIFICATE); | |
2832 | al=SSL_AD_HANDSHAKE_FAILURE; | |
2833 | goto f_err; | |
2834 | } | |
d02b48c6 | 2835 | } |
58964a49 | 2836 | else |
d02b48c6 | 2837 | { |
58964a49 RE |
2838 | i=ssl_verify_cert_chain(s,sk); |
2839 | if (!i) | |
2840 | { | |
2841 | al=ssl_verify_alarm_type(s->verify_result); | |
2842 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE,SSL_R_NO_CERTIFICATE_RETURNED); | |
2843 | goto f_err; | |
2844 | } | |
d02b48c6 RE |
2845 | } |
2846 | ||
b56bce4f | 2847 | if (s->session->peer != NULL) /* This should not be needed */ |
d02b48c6 | 2848 | X509_free(s->session->peer); |
f73e07cf | 2849 | s->session->peer=sk_X509_shift(sk); |
b1fe6ca1 | 2850 | s->session->verify_result = s->verify_result; |
8051996a | 2851 | |
b56bce4f BM |
2852 | /* With the current implementation, sess_cert will always be NULL |
2853 | * when we arrive here. */ | |
2854 | if (s->session->sess_cert == NULL) | |
2855 | { | |
2856 | s->session->sess_cert = ssl_sess_cert_new(); | |
2857 | if (s->session->sess_cert == NULL) | |
2858 | { | |
2859 | SSLerr(SSL_F_SSL3_GET_CLIENT_CERTIFICATE, ERR_R_MALLOC_FAILURE); | |
2860 | goto err; | |
2861 | } | |
2862 | } | |
2863 | if (s->session->sess_cert->cert_chain != NULL) | |
2864 | sk_X509_pop_free(s->session->sess_cert->cert_chain, X509_free); | |
9d5cceac | 2865 | s->session->sess_cert->cert_chain=sk; |
98e04f9e BM |
2866 | /* Inconsistency alert: cert_chain does *not* include the |
2867 | * peer's own certificate, while we do include it in s3_clnt.c */ | |
8051996a | 2868 | |
b4cadc6e | 2869 | sk=NULL; |
d02b48c6 RE |
2870 | |
2871 | ret=1; | |
2872 | if (0) | |
2873 | { | |
2874 | f_err: | |
2875 | ssl3_send_alert(s,SSL3_AL_FATAL,al); | |
2876 | } | |
2877 | err: | |
2878 | if (x != NULL) X509_free(x); | |
f73e07cf | 2879 | if (sk != NULL) sk_X509_pop_free(sk,X509_free); |
d02b48c6 RE |
2880 | return(ret); |
2881 | } | |
2882 | ||
6b691a5c | 2883 | int ssl3_send_server_certificate(SSL *s) |
d02b48c6 RE |
2884 | { |
2885 | unsigned long l; | |
2886 | X509 *x; | |
2887 | ||
2888 | if (s->state == SSL3_ST_SW_CERT_A) | |
2889 | { | |
2890 | x=ssl_get_server_send_cert(s); | |
52b8dad8 BM |
2891 | if (x == NULL) |
2892 | { | |
2893 | /* VRS: allow null cert if auth == KRB5 */ | |
2894 | if ((s->s3->tmp.new_cipher->algorithm_auth != SSL_aKRB5) || | |
2895 | (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5)) | |
2896 | { | |
2897 | SSLerr(SSL_F_SSL3_SEND_SERVER_CERTIFICATE,ERR_R_INTERNAL_ERROR); | |
2898 | return(0); | |
2899 | } | |
d02b48c6 RE |
2900 | } |
2901 | ||
2902 | l=ssl3_output_cert_chain(s,x); | |
2903 | s->state=SSL3_ST_SW_CERT_B; | |
2904 | s->init_num=(int)l; | |
2905 | s->init_off=0; | |
2906 | } | |
2907 | ||
2908 | /* SSL3_ST_SW_CERT_B */ | |
2909 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
2910 | } | |
ddd3a617 | 2911 | #ifndef OPENSSL_NO_TLSEXT |
6434abbf DSH |
2912 | int ssl3_send_newsession_ticket(SSL *s) |
2913 | { | |
2914 | if (s->state == SSL3_ST_SW_SESSION_TICKET_A) | |
2915 | { | |
2916 | unsigned char *p, *senc, *macstart; | |
2917 | int len, slen; | |
2918 | unsigned int hlen; | |
2919 | EVP_CIPHER_CTX ctx; | |
2920 | HMAC_CTX hctx; | |
8a2062fe DSH |
2921 | unsigned char iv[EVP_MAX_IV_LENGTH]; |
2922 | unsigned char key_name[16]; | |
6434abbf DSH |
2923 | |
2924 | /* get session encoding length */ | |
2925 | slen = i2d_SSL_SESSION(s->session, NULL); | |
2926 | /* Some length values are 16 bits, so forget it if session is | |
2927 | * too long | |
2928 | */ | |
2929 | if (slen > 0xFF00) | |
2930 | return -1; | |
2931 | /* Grow buffer if need be: the length calculation is as | |
2932 | * follows 1 (size of message name) + 3 (message length | |
2933 | * bytes) + 4 (ticket lifetime hint) + 2 (ticket length) + | |
2934 | * 16 (key name) + max_iv_len (iv length) + | |
2935 | * session_length + max_enc_block_size (max encrypted session | |
2936 | * length) + max_md_size (HMAC). | |
2937 | */ | |
2938 | if (!BUF_MEM_grow(s->init_buf, | |
2939 | 26 + EVP_MAX_IV_LENGTH + EVP_MAX_BLOCK_LENGTH + | |
2940 | EVP_MAX_MD_SIZE + slen)) | |
2941 | return -1; | |
2942 | senc = OPENSSL_malloc(slen); | |
2943 | if (!senc) | |
2944 | return -1; | |
2945 | p = senc; | |
2946 | i2d_SSL_SESSION(s->session, &p); | |
2947 | ||
2948 | p=(unsigned char *)s->init_buf->data; | |
2949 | /* do the header */ | |
2950 | *(p++)=SSL3_MT_NEWSESSION_TICKET; | |
2951 | /* Skip message length for now */ | |
2952 | p += 3; | |
8a2062fe DSH |
2953 | EVP_CIPHER_CTX_init(&ctx); |
2954 | HMAC_CTX_init(&hctx); | |
2955 | /* Initialize HMAC and cipher contexts. If callback present | |
2956 | * it does all the work otherwise use generated values | |
2957 | * from parent ctx. | |
2958 | */ | |
2959 | if (s->ctx->tlsext_ticket_key_cb) | |
2960 | { | |
2961 | if (s->ctx->tlsext_ticket_key_cb(s, key_name, iv, &ctx, | |
2962 | &hctx, 1) < 0) | |
2963 | { | |
2964 | OPENSSL_free(senc); | |
2965 | return -1; | |
2966 | } | |
2967 | } | |
2968 | else | |
2969 | { | |
2970 | RAND_pseudo_bytes(iv, 16); | |
2971 | EVP_EncryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL, | |
2972 | s->ctx->tlsext_tick_aes_key, iv); | |
2973 | HMAC_Init_ex(&hctx, s->ctx->tlsext_tick_hmac_key, 16, | |
2974 | tlsext_tick_md(), NULL); | |
2975 | memcpy(key_name, s->ctx->tlsext_tick_key_name, 16); | |
2976 | } | |
6434abbf DSH |
2977 | l2n(s->session->tlsext_tick_lifetime_hint, p); |
2978 | /* Skip ticket length for now */ | |
2979 | p += 2; | |
2980 | /* Output key name */ | |
2981 | macstart = p; | |
8a2062fe | 2982 | memcpy(p, key_name, 16); |
6434abbf | 2983 | p += 16; |
8a2062fe DSH |
2984 | /* output IV */ |
2985 | memcpy(p, iv, EVP_CIPHER_CTX_iv_length(&ctx)); | |
2986 | p += EVP_CIPHER_CTX_iv_length(&ctx); | |
6434abbf | 2987 | /* Encrypt session data */ |
6434abbf DSH |
2988 | EVP_EncryptUpdate(&ctx, p, &len, senc, slen); |
2989 | p += len; | |
2990 | EVP_EncryptFinal(&ctx, p, &len); | |
2991 | p += len; | |
2992 | EVP_CIPHER_CTX_cleanup(&ctx); | |
2993 | ||
6434abbf DSH |
2994 | HMAC_Update(&hctx, macstart, p - macstart); |
2995 | HMAC_Final(&hctx, p, &hlen); | |
2996 | HMAC_CTX_cleanup(&hctx); | |
2997 | ||
2998 | p += hlen; | |
2999 | /* Now write out lengths: p points to end of data written */ | |
3000 | /* Total length */ | |
3001 | len = p - (unsigned char *)s->init_buf->data; | |
3002 | p=(unsigned char *)s->init_buf->data + 1; | |
3003 | l2n3(len - 4, p); /* Message length */ | |
3004 | p += 4; | |
3005 | s2n(len - 10, p); /* Ticket length */ | |
3006 | ||
3007 | /* number of bytes to write */ | |
3008 | s->init_num= len; | |
3009 | s->state=SSL3_ST_SW_SESSION_TICKET_B; | |
3010 | s->init_off=0; | |
3011 | OPENSSL_free(senc); | |
3012 | } | |
3013 | ||
3014 | /* SSL3_ST_SW_SESSION_TICKET_B */ | |
3015 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
3016 | } | |
67c8e7f4 DSH |
3017 | |
3018 | int ssl3_send_cert_status(SSL *s) | |
3019 | { | |
3020 | if (s->state == SSL3_ST_SW_CERT_STATUS_A) | |
3021 | { | |
3022 | unsigned char *p; | |
3023 | /* Grow buffer if need be: the length calculation is as | |
3024 | * follows 1 (message type) + 3 (message length) + | |
3025 | * 1 (ocsp response type) + 3 (ocsp response length) | |
3026 | * + (ocsp response) | |
3027 | */ | |
3028 | if (!BUF_MEM_grow(s->init_buf, 8 + s->tlsext_ocsp_resplen)) | |
3029 | return -1; | |
3030 | ||
3031 | p=(unsigned char *)s->init_buf->data; | |
3032 | ||
3033 | /* do the header */ | |
3034 | *(p++)=SSL3_MT_CERTIFICATE_STATUS; | |
3035 | /* message length */ | |
3036 | l2n3(s->tlsext_ocsp_resplen + 4, p); | |
3037 | /* status type */ | |
3038 | *(p++)= s->tlsext_status_type; | |
3039 | /* length of OCSP response */ | |
3040 | l2n3(s->tlsext_ocsp_resplen, p); | |
3041 | /* actual response */ | |
3042 | memcpy(p, s->tlsext_ocsp_resp, s->tlsext_ocsp_resplen); | |
3043 | /* number of bytes to write */ | |
3044 | s->init_num = 8 + s->tlsext_ocsp_resplen; | |
3045 | s->state=SSL3_ST_SW_CERT_STATUS_B; | |
3046 | s->init_off = 0; | |
3047 | } | |
3048 | ||
3049 | /* SSL3_ST_SW_CERT_STATUS_B */ | |
3050 | return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); | |
3051 | } | |
6434abbf | 3052 | #endif |