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4853 illumos-gate is not lint-clean when built with openssl 1.0
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--- old/usr/src/lib/openssl/libsunw_ssl/s3_clnt.c
+++ new/usr/src/lib/openssl/libsunw_ssl/s3_clnt.c
1 1 /* ssl/s3_clnt.c */
2 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 3 * All rights reserved.
4 4 *
5 5 * This package is an SSL implementation written
6 6 * by Eric Young (eay@cryptsoft.com).
7 7 * The implementation was written so as to conform with Netscapes SSL.
8 8 *
9 9 * This library is free for commercial and non-commercial use as long as
10 10 * the following conditions are aheared to. The following conditions
11 11 * apply to all code found in this distribution, be it the RC4, RSA,
12 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 13 * included with this distribution is covered by the same copyright terms
14 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 15 *
16 16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 17 * the code are not to be removed.
18 18 * If this package is used in a product, Eric Young should be given attribution
19 19 * as the author of the parts of the library used.
20 20 * This can be in the form of a textual message at program startup or
21 21 * in documentation (online or textual) provided with the package.
22 22 *
23 23 * Redistribution and use in source and binary forms, with or without
24 24 * modification, are permitted provided that the following conditions
25 25 * are met:
26 26 * 1. Redistributions of source code must retain the copyright
27 27 * notice, this list of conditions and the following disclaimer.
28 28 * 2. Redistributions in binary form must reproduce the above copyright
29 29 * notice, this list of conditions and the following disclaimer in the
30 30 * documentation and/or other materials provided with the distribution.
31 31 * 3. All advertising materials mentioning features or use of this software
32 32 * must display the following acknowledgement:
33 33 * "This product includes cryptographic software written by
34 34 * Eric Young (eay@cryptsoft.com)"
35 35 * The word 'cryptographic' can be left out if the rouines from the library
36 36 * being used are not cryptographic related :-).
37 37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 38 * the apps directory (application code) you must include an acknowledgement:
39 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 40 *
41 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 51 * SUCH DAMAGE.
52 52 *
53 53 * The licence and distribution terms for any publically available version or
54 54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 55 * copied and put under another distribution licence
56 56 * [including the GNU Public Licence.]
57 57 */
58 58 /* ====================================================================
59 59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
60 60 *
61 61 * Redistribution and use in source and binary forms, with or without
62 62 * modification, are permitted provided that the following conditions
63 63 * are met:
64 64 *
65 65 * 1. Redistributions of source code must retain the above copyright
66 66 * notice, this list of conditions and the following disclaimer.
67 67 *
68 68 * 2. Redistributions in binary form must reproduce the above copyright
69 69 * notice, this list of conditions and the following disclaimer in
70 70 * the documentation and/or other materials provided with the
71 71 * distribution.
72 72 *
73 73 * 3. All advertising materials mentioning features or use of this
74 74 * software must display the following acknowledgment:
75 75 * "This product includes software developed by the OpenSSL Project
76 76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 77 *
78 78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 79 * endorse or promote products derived from this software without
80 80 * prior written permission. For written permission, please contact
81 81 * openssl-core@openssl.org.
82 82 *
83 83 * 5. Products derived from this software may not be called "OpenSSL"
84 84 * nor may "OpenSSL" appear in their names without prior written
85 85 * permission of the OpenSSL Project.
86 86 *
87 87 * 6. Redistributions of any form whatsoever must retain the following
88 88 * acknowledgment:
89 89 * "This product includes software developed by the OpenSSL Project
90 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 91 *
92 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 104 * ====================================================================
105 105 *
106 106 * This product includes cryptographic software written by Eric Young
107 107 * (eay@cryptsoft.com). This product includes software written by Tim
108 108 * Hudson (tjh@cryptsoft.com).
109 109 *
110 110 */
111 111 /* ====================================================================
112 112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
113 113 *
114 114 * Portions of the attached software ("Contribution") are developed by
115 115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
116 116 *
117 117 * The Contribution is licensed pursuant to the OpenSSL open source
118 118 * license provided above.
119 119 *
120 120 * ECC cipher suite support in OpenSSL originally written by
121 121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories.
122 122 *
123 123 */
124 124 /* ====================================================================
125 125 * Copyright 2005 Nokia. All rights reserved.
126 126 *
127 127 * The portions of the attached software ("Contribution") is developed by
128 128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source
129 129 * license.
130 130 *
131 131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of
132 132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites
133 133 * support (see RFC 4279) to OpenSSL.
134 134 *
135 135 * No patent licenses or other rights except those expressly stated in
136 136 * the OpenSSL open source license shall be deemed granted or received
137 137 * expressly, by implication, estoppel, or otherwise.
138 138 *
139 139 * No assurances are provided by Nokia that the Contribution does not
140 140 * infringe the patent or other intellectual property rights of any third
141 141 * party or that the license provides you with all the necessary rights
142 142 * to make use of the Contribution.
143 143 *
144 144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN
145 145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA
146 146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY
147 147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
148 148 * OTHERWISE.
149 149 */
150 150
151 151 #include <stdio.h>
152 152 #include "ssl_locl.h"
153 153 #include "kssl_lcl.h"
154 154 #include <openssl/buffer.h>
155 155 #include <openssl/rand.h>
156 156 #include <openssl/objects.h>
157 157 #include <openssl/evp.h>
158 158 #include <openssl/md5.h>
159 159 #ifdef OPENSSL_FIPS
160 160 #include <openssl/fips.h>
161 161 #endif
162 162 #ifndef OPENSSL_NO_DH
163 163 #include <openssl/dh.h>
164 164 #endif
165 165 #include <openssl/bn.h>
166 166 #ifndef OPENSSL_NO_ENGINE
167 167 #include <openssl/engine.h>
168 168 #endif
169 169
170 170 static const SSL_METHOD *ssl3_get_client_method(int ver);
171 171 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b);
172 172
173 173 static const SSL_METHOD *ssl3_get_client_method(int ver)
174 174 {
175 175 if (ver == SSL3_VERSION)
176 176 return(SSLv3_client_method());
177 177 else
178 178 return(NULL);
179 179 }
180 180
181 181 IMPLEMENT_ssl3_meth_func(SSLv3_client_method,
182 182 ssl_undefined_function,
183 183 ssl3_connect,
184 184 ssl3_get_client_method)
185 185
186 186 int ssl3_connect(SSL *s)
187 187 {
188 188 BUF_MEM *buf=NULL;
189 189 unsigned long Time=(unsigned long)time(NULL);
190 190 void (*cb)(const SSL *ssl,int type,int val)=NULL;
191 191 int ret= -1;
192 192 int new_state,state,skip=0;
193 193
194 194 RAND_add(&Time,sizeof(Time),0);
195 195 ERR_clear_error();
196 196 clear_sys_error();
197 197
198 198 if (s->info_callback != NULL)
199 199 cb=s->info_callback;
200 200 else if (s->ctx->info_callback != NULL)
201 201 cb=s->ctx->info_callback;
202 202
203 203 s->in_handshake++;
204 204 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
205 205
206 206 #ifndef OPENSSL_NO_HEARTBEATS
207 207 /* If we're awaiting a HeartbeatResponse, pretend we
208 208 * already got and don't await it anymore, because
209 209 * Heartbeats don't make sense during handshakes anyway.
210 210 */
211 211 if (s->tlsext_hb_pending)
212 212 {
213 213 s->tlsext_hb_pending = 0;
214 214 s->tlsext_hb_seq++;
215 215 }
216 216 #endif
217 217
218 218 for (;;)
219 219 {
220 220 state=s->state;
221 221
222 222 switch(s->state)
223 223 {
224 224 case SSL_ST_RENEGOTIATE:
225 225 s->renegotiate=1;
226 226 s->state=SSL_ST_CONNECT;
227 227 s->ctx->stats.sess_connect_renegotiate++;
228 228 /* break */
229 229 case SSL_ST_BEFORE:
230 230 case SSL_ST_CONNECT:
231 231 case SSL_ST_BEFORE|SSL_ST_CONNECT:
232 232 case SSL_ST_OK|SSL_ST_CONNECT:
233 233
234 234 s->server=0;
235 235 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
236 236
237 237 if ((s->version & 0xff00 ) != 0x0300)
238 238 {
239 239 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR);
240 240 ret = -1;
241 241 goto end;
242 242 }
243 243
244 244 /* s->version=SSL3_VERSION; */
245 245 s->type=SSL_ST_CONNECT;
246 246
247 247 if (s->init_buf == NULL)
248 248 {
249 249 if ((buf=BUF_MEM_new()) == NULL)
250 250 {
251 251 ret= -1;
252 252 goto end;
253 253 }
254 254 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
255 255 {
256 256 ret= -1;
257 257 goto end;
258 258 }
259 259 s->init_buf=buf;
260 260 buf=NULL;
261 261 }
262 262
263 263 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
264 264
265 265 /* setup buffing BIO */
266 266 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; }
267 267
268 268 /* don't push the buffering BIO quite yet */
269 269
270 270 ssl3_init_finished_mac(s);
271 271
272 272 s->state=SSL3_ST_CW_CLNT_HELLO_A;
273 273 s->ctx->stats.sess_connect++;
274 274 s->init_num=0;
275 275 break;
276 276
277 277 case SSL3_ST_CW_CLNT_HELLO_A:
278 278 case SSL3_ST_CW_CLNT_HELLO_B:
279 279
280 280 s->shutdown=0;
281 281 ret=ssl3_client_hello(s);
282 282 if (ret <= 0) goto end;
283 283 s->state=SSL3_ST_CR_SRVR_HELLO_A;
284 284 s->init_num=0;
285 285
286 286 /* turn on buffering for the next lot of output */
287 287 if (s->bbio != s->wbio)
288 288 s->wbio=BIO_push(s->bbio,s->wbio);
289 289
290 290 break;
291 291
292 292 case SSL3_ST_CR_SRVR_HELLO_A:
293 293 case SSL3_ST_CR_SRVR_HELLO_B:
294 294 ret=ssl3_get_server_hello(s);
295 295 if (ret <= 0) goto end;
296 296
297 297 if (s->hit)
298 298 {
299 299 s->state=SSL3_ST_CR_FINISHED_A;
300 300 #ifndef OPENSSL_NO_TLSEXT
301 301 if (s->tlsext_ticket_expected)
302 302 {
303 303 /* receive renewed session ticket */
304 304 s->state=SSL3_ST_CR_SESSION_TICKET_A;
305 305 }
306 306 #endif
307 307 }
308 308 else
309 309 s->state=SSL3_ST_CR_CERT_A;
310 310 s->init_num=0;
311 311 break;
312 312
313 313 case SSL3_ST_CR_CERT_A:
314 314 case SSL3_ST_CR_CERT_B:
315 315 #ifndef OPENSSL_NO_TLSEXT
316 316 ret=ssl3_check_finished(s);
317 317 if (ret <= 0) goto end;
318 318 if (ret == 2)
319 319 {
320 320 s->hit = 1;
321 321 if (s->tlsext_ticket_expected)
322 322 s->state=SSL3_ST_CR_SESSION_TICKET_A;
323 323 else
324 324 s->state=SSL3_ST_CR_FINISHED_A;
325 325 s->init_num=0;
326 326 break;
327 327 }
328 328 #endif
329 329 /* Check if it is anon DH/ECDH */
330 330 /* or PSK */
331 331 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) &&
332 332 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK))
333 333 {
334 334 ret=ssl3_get_server_certificate(s);
335 335 if (ret <= 0) goto end;
336 336 #ifndef OPENSSL_NO_TLSEXT
337 337 if (s->tlsext_status_expected)
338 338 s->state=SSL3_ST_CR_CERT_STATUS_A;
339 339 else
340 340 s->state=SSL3_ST_CR_KEY_EXCH_A;
341 341 }
342 342 else
343 343 {
344 344 skip = 1;
345 345 s->state=SSL3_ST_CR_KEY_EXCH_A;
346 346 }
347 347 #else
348 348 }
349 349 else
350 350 skip=1;
351 351
352 352 s->state=SSL3_ST_CR_KEY_EXCH_A;
353 353 #endif
354 354 s->init_num=0;
355 355 break;
356 356
357 357 case SSL3_ST_CR_KEY_EXCH_A:
358 358 case SSL3_ST_CR_KEY_EXCH_B:
359 359 ret=ssl3_get_key_exchange(s);
360 360 if (ret <= 0) goto end;
361 361 s->state=SSL3_ST_CR_CERT_REQ_A;
362 362 s->init_num=0;
363 363
364 364 /* at this point we check that we have the
365 365 * required stuff from the server */
366 366 if (!ssl3_check_cert_and_algorithm(s))
367 367 {
368 368 ret= -1;
369 369 goto end;
370 370 }
371 371 break;
372 372
373 373 case SSL3_ST_CR_CERT_REQ_A:
374 374 case SSL3_ST_CR_CERT_REQ_B:
375 375 ret=ssl3_get_certificate_request(s);
376 376 if (ret <= 0) goto end;
377 377 s->state=SSL3_ST_CR_SRVR_DONE_A;
378 378 s->init_num=0;
379 379 break;
380 380
381 381 case SSL3_ST_CR_SRVR_DONE_A:
382 382 case SSL3_ST_CR_SRVR_DONE_B:
383 383 ret=ssl3_get_server_done(s);
384 384 if (ret <= 0) goto end;
385 385 #ifndef OPENSSL_NO_SRP
386 386 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP)
387 387 {
388 388 if ((ret = SRP_Calc_A_param(s))<=0)
389 389 {
390 390 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC);
391 391 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR);
392 392 goto end;
393 393 }
394 394 }
395 395 #endif
396 396 if (s->s3->tmp.cert_req)
397 397 s->state=SSL3_ST_CW_CERT_A;
398 398 else
399 399 s->state=SSL3_ST_CW_KEY_EXCH_A;
400 400 s->init_num=0;
401 401
402 402 break;
403 403
404 404 case SSL3_ST_CW_CERT_A:
405 405 case SSL3_ST_CW_CERT_B:
406 406 case SSL3_ST_CW_CERT_C:
407 407 case SSL3_ST_CW_CERT_D:
408 408 ret=ssl3_send_client_certificate(s);
409 409 if (ret <= 0) goto end;
410 410 s->state=SSL3_ST_CW_KEY_EXCH_A;
411 411 s->init_num=0;
412 412 break;
413 413
414 414 case SSL3_ST_CW_KEY_EXCH_A:
415 415 case SSL3_ST_CW_KEY_EXCH_B:
416 416 ret=ssl3_send_client_key_exchange(s);
417 417 if (ret <= 0) goto end;
418 418 /* EAY EAY EAY need to check for DH fix cert
419 419 * sent back */
420 420 /* For TLS, cert_req is set to 2, so a cert chain
421 421 * of nothing is sent, but no verify packet is sent */
422 422 /* XXX: For now, we do not support client
423 423 * authentication in ECDH cipher suites with
424 424 * ECDH (rather than ECDSA) certificates.
425 425 * We need to skip the certificate verify
426 426 * message when client's ECDH public key is sent
427 427 * inside the client certificate.
428 428 */
429 429 if (s->s3->tmp.cert_req == 1)
430 430 {
431 431 s->state=SSL3_ST_CW_CERT_VRFY_A;
432 432 }
433 433 else
434 434 {
435 435 s->state=SSL3_ST_CW_CHANGE_A;
436 436 s->s3->change_cipher_spec=0;
437 437 }
438 438 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY)
439 439 {
440 440 s->state=SSL3_ST_CW_CHANGE_A;
441 441 s->s3->change_cipher_spec=0;
442 442 }
443 443
444 444 s->init_num=0;
445 445 break;
446 446
447 447 case SSL3_ST_CW_CERT_VRFY_A:
448 448 case SSL3_ST_CW_CERT_VRFY_B:
449 449 ret=ssl3_send_client_verify(s);
450 450 if (ret <= 0) goto end;
451 451 s->state=SSL3_ST_CW_CHANGE_A;
452 452 s->init_num=0;
453 453 s->s3->change_cipher_spec=0;
454 454 break;
455 455
456 456 case SSL3_ST_CW_CHANGE_A:
457 457 case SSL3_ST_CW_CHANGE_B:
458 458 ret=ssl3_send_change_cipher_spec(s,
459 459 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B);
460 460 if (ret <= 0) goto end;
461 461
462 462 #if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG)
463 463 s->state=SSL3_ST_CW_FINISHED_A;
464 464 #else
465 465 if (s->s3->next_proto_neg_seen)
466 466 s->state=SSL3_ST_CW_NEXT_PROTO_A;
467 467 else
468 468 s->state=SSL3_ST_CW_FINISHED_A;
469 469 #endif
470 470 s->init_num=0;
471 471
472 472 s->session->cipher=s->s3->tmp.new_cipher;
473 473 #ifdef OPENSSL_NO_COMP
474 474 s->session->compress_meth=0;
475 475 #else
476 476 if (s->s3->tmp.new_compression == NULL)
477 477 s->session->compress_meth=0;
478 478 else
479 479 s->session->compress_meth=
480 480 s->s3->tmp.new_compression->id;
481 481 #endif
482 482 if (!s->method->ssl3_enc->setup_key_block(s))
483 483 {
484 484 ret= -1;
485 485 goto end;
486 486 }
487 487
488 488 if (!s->method->ssl3_enc->change_cipher_state(s,
489 489 SSL3_CHANGE_CIPHER_CLIENT_WRITE))
490 490 {
491 491 ret= -1;
492 492 goto end;
493 493 }
494 494
495 495 break;
496 496
497 497 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
498 498 case SSL3_ST_CW_NEXT_PROTO_A:
499 499 case SSL3_ST_CW_NEXT_PROTO_B:
500 500 ret=ssl3_send_next_proto(s);
501 501 if (ret <= 0) goto end;
502 502 s->state=SSL3_ST_CW_FINISHED_A;
503 503 break;
504 504 #endif
505 505
506 506 case SSL3_ST_CW_FINISHED_A:
507 507 case SSL3_ST_CW_FINISHED_B:
508 508 ret=ssl3_send_finished(s,
509 509 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B,
510 510 s->method->ssl3_enc->client_finished_label,
511 511 s->method->ssl3_enc->client_finished_label_len);
512 512 if (ret <= 0) goto end;
513 513 s->s3->flags |= SSL3_FLAGS_CCS_OK;
514 514 s->state=SSL3_ST_CW_FLUSH;
515 515
516 516 /* clear flags */
517 517 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER;
518 518 if (s->hit)
519 519 {
520 520 s->s3->tmp.next_state=SSL_ST_OK;
521 521 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)
522 522 {
523 523 s->state=SSL_ST_OK;
524 524 s->s3->flags|=SSL3_FLAGS_POP_BUFFER;
525 525 s->s3->delay_buf_pop_ret=0;
526 526 }
527 527 }
528 528 else
529 529 {
530 530 #ifndef OPENSSL_NO_TLSEXT
531 531 /* Allow NewSessionTicket if ticket expected */
532 532 if (s->tlsext_ticket_expected)
533 533 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A;
534 534 else
535 535 #endif
536 536
537 537 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A;
538 538 }
539 539 s->init_num=0;
540 540 break;
541 541
542 542 #ifndef OPENSSL_NO_TLSEXT
543 543 case SSL3_ST_CR_SESSION_TICKET_A:
544 544 case SSL3_ST_CR_SESSION_TICKET_B:
545 545 ret=ssl3_get_new_session_ticket(s);
546 546 if (ret <= 0) goto end;
547 547 s->state=SSL3_ST_CR_FINISHED_A;
548 548 s->init_num=0;
549 549 break;
550 550
551 551 case SSL3_ST_CR_CERT_STATUS_A:
552 552 case SSL3_ST_CR_CERT_STATUS_B:
553 553 ret=ssl3_get_cert_status(s);
554 554 if (ret <= 0) goto end;
555 555 s->state=SSL3_ST_CR_KEY_EXCH_A;
556 556 s->init_num=0;
557 557 break;
558 558 #endif
559 559
560 560 case SSL3_ST_CR_FINISHED_A:
561 561 case SSL3_ST_CR_FINISHED_B:
562 562
563 563 s->s3->flags |= SSL3_FLAGS_CCS_OK;
564 564 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A,
565 565 SSL3_ST_CR_FINISHED_B);
566 566 if (ret <= 0) goto end;
567 567
568 568 if (s->hit)
569 569 s->state=SSL3_ST_CW_CHANGE_A;
570 570 else
571 571 s->state=SSL_ST_OK;
572 572 s->init_num=0;
573 573 break;
574 574
575 575 case SSL3_ST_CW_FLUSH:
576 576 s->rwstate=SSL_WRITING;
577 577 if (BIO_flush(s->wbio) <= 0)
578 578 {
579 579 ret= -1;
580 580 goto end;
581 581 }
582 582 s->rwstate=SSL_NOTHING;
583 583 s->state=s->s3->tmp.next_state;
584 584 break;
585 585
586 586 case SSL_ST_OK:
587 587 /* clean a few things up */
588 588 ssl3_cleanup_key_block(s);
589 589
590 590 if (s->init_buf != NULL)
591 591 {
592 592 BUF_MEM_free(s->init_buf);
593 593 s->init_buf=NULL;
594 594 }
595 595
596 596 /* If we are not 'joining' the last two packets,
597 597 * remove the buffering now */
598 598 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER))
599 599 ssl_free_wbio_buffer(s);
600 600 /* else do it later in ssl3_write */
601 601
602 602 s->init_num=0;
603 603 s->renegotiate=0;
604 604 s->new_session=0;
605 605
606 606 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT);
607 607 if (s->hit) s->ctx->stats.sess_hit++;
608 608
609 609 ret=1;
610 610 /* s->server=0; */
611 611 s->handshake_func=ssl3_connect;
612 612 s->ctx->stats.sess_connect_good++;
613 613
614 614 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1);
615 615
616 616 goto end;
617 617 /* break; */
618 618
619 619 default:
620 620 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE);
621 621 ret= -1;
622 622 goto end;
623 623 /* break; */
624 624 }
625 625
626 626 /* did we do anything */
627 627 if (!s->s3->tmp.reuse_message && !skip)
628 628 {
629 629 if (s->debug)
630 630 {
631 631 if ((ret=BIO_flush(s->wbio)) <= 0)
632 632 goto end;
633 633 }
634 634
635 635 if ((cb != NULL) && (s->state != state))
636 636 {
637 637 new_state=s->state;
638 638 s->state=state;
639 639 cb(s,SSL_CB_CONNECT_LOOP,1);
640 640 s->state=new_state;
641 641 }
642 642 }
643 643 skip=0;
644 644 }
645 645 end:
646 646 s->in_handshake--;
647 647 if (buf != NULL)
648 648 BUF_MEM_free(buf);
649 649 if (cb != NULL)
650 650 cb(s,SSL_CB_CONNECT_EXIT,ret);
651 651 return(ret);
652 652 }
653 653
654 654
655 655 int ssl3_client_hello(SSL *s)
656 656 {
657 657 unsigned char *buf;
658 658 unsigned char *p,*d;
659 659 int i;
660 660 unsigned long l;
661 661 #ifndef OPENSSL_NO_COMP
662 662 int j;
663 663 SSL_COMP *comp;
664 664 #endif
665 665
666 666 buf=(unsigned char *)s->init_buf->data;
667 667 if (s->state == SSL3_ST_CW_CLNT_HELLO_A)
668 668 {
669 669 SSL_SESSION *sess = s->session;
670 670 if ((sess == NULL) ||
671 671 (sess->ssl_version != s->version) ||
672 672 #ifdef OPENSSL_NO_TLSEXT
673 673 !sess->session_id_length ||
674 674 #else
675 675 (!sess->session_id_length && !sess->tlsext_tick) ||
676 676 #endif
677 677 (sess->not_resumable))
678 678 {
679 679 if (!ssl_get_new_session(s,0))
680 680 goto err;
681 681 }
682 682 /* else use the pre-loaded session */
683 683
684 684 p=s->s3->client_random;
685 685
686 686 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0)
687 687 goto err;
688 688
689 689 /* Do the message type and length last */
690 690 d=p= &(buf[4]);
691 691
692 692 /* version indicates the negotiated version: for example from
693 693 * an SSLv2/v3 compatible client hello). The client_version
694 694 * field is the maximum version we permit and it is also
695 695 * used in RSA encrypted premaster secrets. Some servers can
696 696 * choke if we initially report a higher version then
697 697 * renegotiate to a lower one in the premaster secret. This
698 698 * didn't happen with TLS 1.0 as most servers supported it
699 699 * but it can with TLS 1.1 or later if the server only supports
700 700 * 1.0.
701 701 *
702 702 * Possible scenario with previous logic:
703 703 * 1. Client hello indicates TLS 1.2
704 704 * 2. Server hello says TLS 1.0
705 705 * 3. RSA encrypted premaster secret uses 1.2.
706 706 * 4. Handhaked proceeds using TLS 1.0.
707 707 * 5. Server sends hello request to renegotiate.
708 708 * 6. Client hello indicates TLS v1.0 as we now
709 709 * know that is maximum server supports.
710 710 * 7. Server chokes on RSA encrypted premaster secret
711 711 * containing version 1.0.
712 712 *
713 713 * For interoperability it should be OK to always use the
714 714 * maximum version we support in client hello and then rely
715 715 * on the checking of version to ensure the servers isn't
716 716 * being inconsistent: for example initially negotiating with
717 717 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using
718 718 * client_version in client hello and not resetting it to
719 719 * the negotiated version.
720 720 */
721 721 #if 0
722 722 *(p++)=s->version>>8;
723 723 *(p++)=s->version&0xff;
724 724 s->client_version=s->version;
725 725 #else
726 726 *(p++)=s->client_version>>8;
727 727 *(p++)=s->client_version&0xff;
728 728 #endif
729 729
730 730 /* Random stuff */
731 731 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE);
732 732 p+=SSL3_RANDOM_SIZE;
733 733
734 734 /* Session ID */
735 735 if (s->new_session)
736 736 i=0;
737 737 else
738 738 i=s->session->session_id_length;
739 739 *(p++)=i;
740 740 if (i != 0)
741 741 {
742 742 if (i > (int)sizeof(s->session->session_id))
743 743 {
744 744 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR);
745 745 goto err;
746 746 }
747 747 memcpy(p,s->session->session_id,i);
748 748 p+=i;
749 749 }
750 750
751 751 /* Ciphers supported */
752 752 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0);
753 753 if (i == 0)
754 754 {
755 755 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
756 756 goto err;
757 757 }
758 758 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
759 759 /* Some servers hang if client hello > 256 bytes
760 760 * as hack workaround chop number of supported ciphers
761 761 * to keep it well below this if we use TLS v1.2
762 762 */
763 763 if (TLS1_get_version(s) >= TLS1_2_VERSION
764 764 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
765 765 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
766 766 #endif
767 767 s2n(i,p);
768 768 p+=i;
769 769
770 770 /* COMPRESSION */
771 771 #ifdef OPENSSL_NO_COMP
772 772 *(p++)=1;
773 773 #else
774 774
775 775 if ((s->options & SSL_OP_NO_COMPRESSION)
776 776 || !s->ctx->comp_methods)
777 777 j=0;
778 778 else
779 779 j=sk_SSL_COMP_num(s->ctx->comp_methods);
780 780 *(p++)=1+j;
781 781 for (i=0; i<j; i++)
782 782 {
783 783 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
784 784 *(p++)=comp->id;
785 785 }
786 786 #endif
787 787 *(p++)=0; /* Add the NULL method */
788 788
789 789 #ifndef OPENSSL_NO_TLSEXT
790 790 /* TLS extensions*/
791 791 if (ssl_prepare_clienthello_tlsext(s) <= 0)
792 792 {
793 793 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
794 794 goto err;
795 795 }
796 796 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
797 797 {
798 798 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
799 799 goto err;
800 800 }
801 801 #endif
802 802
803 803 l=(p-d);
804 804 d=buf;
805 805 *(d++)=SSL3_MT_CLIENT_HELLO;
806 806 l2n3(l,d);
807 807
808 808 s->state=SSL3_ST_CW_CLNT_HELLO_B;
809 809 /* number of bytes to write */
810 810 s->init_num=p-buf;
811 811 s->init_off=0;
812 812 }
813 813
814 814 /* SSL3_ST_CW_CLNT_HELLO_B */
815 815 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
816 816 err:
817 817 return(-1);
818 818 }
819 819
820 820 int ssl3_get_server_hello(SSL *s)
821 821 {
822 822 STACK_OF(SSL_CIPHER) *sk;
823 823 const SSL_CIPHER *c;
824 824 unsigned char *p,*d;
825 825 int i,al,ok;
826 826 unsigned int j;
827 827 long n;
828 828 #ifndef OPENSSL_NO_COMP
829 829 SSL_COMP *comp;
830 830 #endif
831 831
832 832 n=s->method->ssl_get_message(s,
833 833 SSL3_ST_CR_SRVR_HELLO_A,
834 834 SSL3_ST_CR_SRVR_HELLO_B,
835 835 -1,
836 836 20000, /* ?? */
837 837 &ok);
838 838
839 839 if (!ok) return((int)n);
840 840
841 841 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
842 842 {
843 843 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST)
844 844 {
845 845 if ( s->d1->send_cookie == 0)
846 846 {
847 847 s->s3->tmp.reuse_message = 1;
848 848 return 1;
849 849 }
850 850 else /* already sent a cookie */
851 851 {
852 852 al=SSL_AD_UNEXPECTED_MESSAGE;
853 853 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
854 854 goto f_err;
855 855 }
856 856 }
857 857 }
858 858
859 859 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO)
860 860 {
861 861 al=SSL_AD_UNEXPECTED_MESSAGE;
862 862 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE);
863 863 goto f_err;
864 864 }
865 865
866 866 d=p=(unsigned char *)s->init_msg;
867 867
868 868 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff)))
869 869 {
870 870 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION);
871 871 s->version=(s->version&0xff00)|p[1];
872 872 al=SSL_AD_PROTOCOL_VERSION;
873 873 goto f_err;
874 874 }
875 875 p+=2;
876 876
877 877 /* load the server hello data */
878 878 /* load the server random */
879 879 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE);
880 880 p+=SSL3_RANDOM_SIZE;
881 881
882 882 /* get the session-id */
883 883 j= *(p++);
884 884
885 885 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE))
886 886 {
887 887 al=SSL_AD_ILLEGAL_PARAMETER;
888 888 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG);
889 889 goto f_err;
890 890 }
891 891
892 892 #ifndef OPENSSL_NO_TLSEXT
893 893 /* check if we want to resume the session based on external pre-shared secret */
894 894 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb)
895 895 {
896 896 SSL_CIPHER *pref_cipher=NULL;
897 897 s->session->master_key_length=sizeof(s->session->master_key);
898 898 if (s->tls_session_secret_cb(s, s->session->master_key,
899 899 &s->session->master_key_length,
900 900 NULL, &pref_cipher,
901 901 s->tls_session_secret_cb_arg))
902 902 {
903 903 s->session->cipher = pref_cipher ?
904 904 pref_cipher : ssl_get_cipher_by_char(s, p+j);
905 905 s->s3->flags |= SSL3_FLAGS_CCS_OK;
906 906 }
907 907 }
908 908 #endif /* OPENSSL_NO_TLSEXT */
909 909
910 910 if (j != 0 && j == s->session->session_id_length
911 911 && memcmp(p,s->session->session_id,j) == 0)
912 912 {
913 913 if(s->sid_ctx_length != s->session->sid_ctx_length
914 914 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length))
915 915 {
916 916 /* actually a client application bug */
917 917 al=SSL_AD_ILLEGAL_PARAMETER;
918 918 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT);
919 919 goto f_err;
920 920 }
921 921 s->s3->flags |= SSL3_FLAGS_CCS_OK;
922 922 s->hit=1;
923 923 }
924 924 else /* a miss or crap from the other end */
925 925 {
926 926 /* If we were trying for session-id reuse, make a new
927 927 * SSL_SESSION so we don't stuff up other people */
928 928 s->hit=0;
929 929 if (s->session->session_id_length > 0)
930 930 {
931 931 if (!ssl_get_new_session(s,0))
932 932 {
933 933 al=SSL_AD_INTERNAL_ERROR;
934 934 goto f_err;
935 935 }
936 936 }
937 937 s->session->session_id_length=j;
938 938 memcpy(s->session->session_id,p,j); /* j could be 0 */
939 939 }
940 940 p+=j;
941 941 c=ssl_get_cipher_by_char(s,p);
942 942 if (c == NULL)
943 943 {
944 944 /* unknown cipher */
945 945 al=SSL_AD_ILLEGAL_PARAMETER;
946 946 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED);
947 947 goto f_err;
948 948 }
949 949 /* TLS v1.2 only ciphersuites require v1.2 or later */
950 950 if ((c->algorithm_ssl & SSL_TLSV1_2) &&
951 951 (TLS1_get_version(s) < TLS1_2_VERSION))
952 952 {
953 953 al=SSL_AD_ILLEGAL_PARAMETER;
954 954 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
955 955 goto f_err;
956 956 }
957 957 #ifndef OPENSSL_NO_SRP
958 958 if (((c->algorithm_mkey & SSL_kSRP) || (c->algorithm_auth & SSL_aSRP)) &&
959 959 !(s->srp_ctx.srp_Mask & SSL_kSRP))
960 960 {
961 961 al=SSL_AD_ILLEGAL_PARAMETER;
962 962 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
963 963 goto f_err;
964 964 }
965 965 #endif /* OPENSSL_NO_SRP */
966 966 p+=ssl_put_cipher_by_char(s,NULL,NULL);
967 967
968 968 sk=ssl_get_ciphers_by_id(s);
969 969 i=sk_SSL_CIPHER_find(sk,c);
970 970 if (i < 0)
971 971 {
972 972 /* we did not say we would use this cipher */
973 973 al=SSL_AD_ILLEGAL_PARAMETER;
974 974 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED);
975 975 goto f_err;
976 976 }
977 977
978 978 /* Depending on the session caching (internal/external), the cipher
979 979 and/or cipher_id values may not be set. Make sure that
980 980 cipher_id is set and use it for comparison. */
981 981 if (s->session->cipher)
982 982 s->session->cipher_id = s->session->cipher->id;
983 983 if (s->hit && (s->session->cipher_id != c->id))
984 984 {
985 985 /* Workaround is now obsolete */
986 986 #if 0
987 987 if (!(s->options &
988 988 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG))
989 989 #endif
990 990 {
991 991 al=SSL_AD_ILLEGAL_PARAMETER;
992 992 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED);
993 993 goto f_err;
994 994 }
995 995 }
996 996 s->s3->tmp.new_cipher=c;
997 997 /* Don't digest cached records if TLS v1.2: we may need them for
998 998 * client authentication.
999 999 */
1000 1000 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s))
1001 1001 {
1002 1002 al = SSL_AD_INTERNAL_ERROR;
1003 1003 goto f_err;
1004 1004 }
1005 1005 /* lets get the compression algorithm */
1006 1006 /* COMPRESSION */
1007 1007 #ifdef OPENSSL_NO_COMP
1008 1008 if (*(p++) != 0)
1009 1009 {
1010 1010 al=SSL_AD_ILLEGAL_PARAMETER;
1011 1011 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1012 1012 goto f_err;
1013 1013 }
1014 1014 /* If compression is disabled we'd better not try to resume a session
1015 1015 * using compression.
1016 1016 */
1017 1017 if (s->session->compress_meth != 0)
1018 1018 {
1019 1019 al=SSL_AD_INTERNAL_ERROR;
1020 1020 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION);
1021 1021 goto f_err;
1022 1022 }
1023 1023 #else
1024 1024 j= *(p++);
1025 1025 if (s->hit && j != s->session->compress_meth)
1026 1026 {
1027 1027 al=SSL_AD_ILLEGAL_PARAMETER;
1028 1028 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED);
1029 1029 goto f_err;
1030 1030 }
1031 1031 if (j == 0)
1032 1032 comp=NULL;
1033 1033 else if (s->options & SSL_OP_NO_COMPRESSION)
1034 1034 {
1035 1035 al=SSL_AD_ILLEGAL_PARAMETER;
1036 1036 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED);
1037 1037 goto f_err;
1038 1038 }
1039 1039 else
1040 1040 comp=ssl3_comp_find(s->ctx->comp_methods,j);
1041 1041
1042 1042 if ((j != 0) && (comp == NULL))
1043 1043 {
1044 1044 al=SSL_AD_ILLEGAL_PARAMETER;
1045 1045 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
1046 1046 goto f_err;
1047 1047 }
1048 1048 else
1049 1049 {
1050 1050 s->s3->tmp.new_compression=comp;
1051 1051 }
1052 1052 #endif
1053 1053
1054 1054 #ifndef OPENSSL_NO_TLSEXT
1055 1055 /* TLS extensions*/
1056 1056 if (s->version >= SSL3_VERSION)
1057 1057 {
1058 1058 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al))
1059 1059 {
1060 1060 /* 'al' set by ssl_parse_serverhello_tlsext */
1061 1061 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT);
1062 1062 goto f_err;
1063 1063 }
1064 1064 if (ssl_check_serverhello_tlsext(s) <= 0)
1065 1065 {
1066 1066 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT);
1067 1067 goto err;
1068 1068 }
1069 1069 }
1070 1070 #endif
1071 1071
1072 1072 if (p != (d+n))
1073 1073 {
1074 1074 /* wrong packet length */
1075 1075 al=SSL_AD_DECODE_ERROR;
1076 1076 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH);
1077 1077 goto f_err;
1078 1078 }
1079 1079
1080 1080 return(1);
1081 1081 f_err:
1082 1082 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1083 1083 err:
1084 1084 return(-1);
1085 1085 }
1086 1086
1087 1087 int ssl3_get_server_certificate(SSL *s)
1088 1088 {
1089 1089 int al,i,ok,ret= -1;
1090 1090 unsigned long n,nc,llen,l;
1091 1091 X509 *x=NULL;
1092 1092 const unsigned char *q,*p;
1093 1093 unsigned char *d;
1094 1094 STACK_OF(X509) *sk=NULL;
1095 1095 SESS_CERT *sc;
1096 1096 EVP_PKEY *pkey=NULL;
1097 1097 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */
1098 1098
1099 1099 n=s->method->ssl_get_message(s,
1100 1100 SSL3_ST_CR_CERT_A,
1101 1101 SSL3_ST_CR_CERT_B,
1102 1102 -1,
1103 1103 s->max_cert_list,
1104 1104 &ok);
1105 1105
1106 1106 if (!ok) return((int)n);
1107 1107
1108 1108 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) ||
1109 1109 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) &&
1110 1110 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)))
1111 1111 {
1112 1112 s->s3->tmp.reuse_message=1;
1113 1113 return(1);
1114 1114 }
1115 1115
1116 1116 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE)
1117 1117 {
1118 1118 al=SSL_AD_UNEXPECTED_MESSAGE;
1119 1119 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE);
1120 1120 goto f_err;
1121 1121 }
1122 1122 p=d=(unsigned char *)s->init_msg;
1123 1123
1124 1124 if ((sk=sk_X509_new_null()) == NULL)
1125 1125 {
1126 1126 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1127 1127 goto err;
1128 1128 }
1129 1129
1130 1130 n2l3(p,llen);
1131 1131 if (llen+3 != n)
1132 1132 {
1133 1133 al=SSL_AD_DECODE_ERROR;
1134 1134 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH);
1135 1135 goto f_err;
1136 1136 }
1137 1137 for (nc=0; nc<llen; )
1138 1138 {
1139 1139 n2l3(p,l);
1140 1140 if ((l+nc+3) > llen)
1141 1141 {
1142 1142 al=SSL_AD_DECODE_ERROR;
1143 1143 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1144 1144 goto f_err;
1145 1145 }
1146 1146
1147 1147 q=p;
1148 1148 x=d2i_X509(NULL,&q,l);
1149 1149 if (x == NULL)
1150 1150 {
1151 1151 al=SSL_AD_BAD_CERTIFICATE;
1152 1152 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB);
1153 1153 goto f_err;
1154 1154 }
1155 1155 if (q != (p+l))
1156 1156 {
1157 1157 al=SSL_AD_DECODE_ERROR;
1158 1158 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH);
1159 1159 goto f_err;
1160 1160 }
1161 1161 if (!sk_X509_push(sk,x))
1162 1162 {
1163 1163 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE);
1164 1164 goto err;
1165 1165 }
1166 1166 x=NULL;
1167 1167 nc+=l+3;
1168 1168 p=q;
1169 1169 }
1170 1170
1171 1171 i=ssl_verify_cert_chain(s,sk);
1172 1172 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0)
1173 1173 #ifndef OPENSSL_NO_KRB5
1174 1174 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1175 1175 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1176 1176 #endif /* OPENSSL_NO_KRB5 */
1177 1177 )
1178 1178 {
1179 1179 al=ssl_verify_alarm_type(s->verify_result);
1180 1180 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED);
1181 1181 goto f_err;
1182 1182 }
1183 1183 ERR_clear_error(); /* but we keep s->verify_result */
1184 1184
1185 1185 sc=ssl_sess_cert_new();
1186 1186 if (sc == NULL) goto err;
1187 1187
1188 1188 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert);
1189 1189 s->session->sess_cert=sc;
1190 1190
1191 1191 sc->cert_chain=sk;
1192 1192 /* Inconsistency alert: cert_chain does include the peer's
1193 1193 * certificate, which we don't include in s3_srvr.c */
1194 1194 x=sk_X509_value(sk,0);
1195 1195 sk=NULL;
1196 1196 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/
1197 1197
1198 1198 pkey=X509_get_pubkey(x);
1199 1199
1200 1200 /* VRS: allow null cert if auth == KRB5 */
1201 1201 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) &&
1202 1202 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5))
1203 1203 ? 0 : 1;
1204 1204
1205 1205 #ifdef KSSL_DEBUG
1206 1206 printf("pkey,x = %p, %p\n", pkey,x);
1207 1207 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey));
1208 1208 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name,
1209 1209 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert);
1210 1210 #endif /* KSSL_DEBUG */
1211 1211
1212 1212 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey)))
1213 1213 {
1214 1214 x=NULL;
1215 1215 al=SSL3_AL_FATAL;
1216 1216 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1217 1217 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS);
1218 1218 goto f_err;
1219 1219 }
1220 1220
1221 1221 i=ssl_cert_type(x,pkey);
1222 1222 if (need_cert && i < 0)
1223 1223 {
1224 1224 x=NULL;
1225 1225 al=SSL3_AL_FATAL;
1226 1226 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,
1227 1227 SSL_R_UNKNOWN_CERTIFICATE_TYPE);
1228 1228 goto f_err;
1229 1229 }
1230 1230
1231 1231 if (need_cert)
1232 1232 {
1233 1233 sc->peer_cert_type=i;
1234 1234 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1235 1235 /* Why would the following ever happen?
1236 1236 * We just created sc a couple of lines ago. */
1237 1237 if (sc->peer_pkeys[i].x509 != NULL)
1238 1238 X509_free(sc->peer_pkeys[i].x509);
1239 1239 sc->peer_pkeys[i].x509=x;
1240 1240 sc->peer_key= &(sc->peer_pkeys[i]);
1241 1241
1242 1242 if (s->session->peer != NULL)
1243 1243 X509_free(s->session->peer);
1244 1244 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509);
1245 1245 s->session->peer=x;
1246 1246 }
1247 1247 else
1248 1248 {
1249 1249 sc->peer_cert_type=i;
1250 1250 sc->peer_key= NULL;
1251 1251
1252 1252 if (s->session->peer != NULL)
1253 1253 X509_free(s->session->peer);
1254 1254 s->session->peer=NULL;
1255 1255 }
1256 1256 s->session->verify_result = s->verify_result;
1257 1257
1258 1258 x=NULL;
1259 1259 ret=1;
1260 1260
1261 1261 if (0)
1262 1262 {
1263 1263 f_err:
1264 1264 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1265 1265 }
1266 1266 err:
1267 1267 EVP_PKEY_free(pkey);
1268 1268 X509_free(x);
1269 1269 sk_X509_pop_free(sk,X509_free);
1270 1270 return(ret);
1271 1271 }
1272 1272
1273 1273 int ssl3_get_key_exchange(SSL *s)
1274 1274 {
1275 1275 #ifndef OPENSSL_NO_RSA
1276 1276 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2];
1277 1277 #endif
1278 1278 EVP_MD_CTX md_ctx;
1279 1279 unsigned char *param,*p;
1280 1280 int al,i,j,param_len,ok;
1281 1281 long n,alg_k,alg_a;
1282 1282 EVP_PKEY *pkey=NULL;
1283 1283 const EVP_MD *md = NULL;
1284 1284 #ifndef OPENSSL_NO_RSA
1285 1285 RSA *rsa=NULL;
1286 1286 #endif
1287 1287 #ifndef OPENSSL_NO_DH
1288 1288 DH *dh=NULL;
1289 1289 #endif
1290 1290 #ifndef OPENSSL_NO_ECDH
1291 1291 EC_KEY *ecdh = NULL;
1292 1292 BN_CTX *bn_ctx = NULL;
1293 1293 EC_POINT *srvr_ecpoint = NULL;
1294 1294 int curve_nid = 0;
1295 1295 int encoded_pt_len = 0;
1296 1296 #endif
1297 1297
1298 1298 /* use same message size as in ssl3_get_certificate_request()
1299 1299 * as ServerKeyExchange message may be skipped */
1300 1300 n=s->method->ssl_get_message(s,
1301 1301 SSL3_ST_CR_KEY_EXCH_A,
1302 1302 SSL3_ST_CR_KEY_EXCH_B,
1303 1303 -1,
1304 1304 s->max_cert_list,
1305 1305 &ok);
1306 1306 if (!ok) return((int)n);
1307 1307
1308 1308 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE)
1309 1309 {
1310 1310 #ifndef OPENSSL_NO_PSK
1311 1311 /* In plain PSK ciphersuite, ServerKeyExchange can be
1312 1312 omitted if no identity hint is sent. Set
1313 1313 session->sess_cert anyway to avoid problems
1314 1314 later.*/
1315 1315 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)
1316 1316 {
1317 1317 s->session->sess_cert=ssl_sess_cert_new();
1318 1318 if (s->ctx->psk_identity_hint)
1319 1319 OPENSSL_free(s->ctx->psk_identity_hint);
1320 1320 s->ctx->psk_identity_hint = NULL;
1321 1321 }
1322 1322 #endif
1323 1323 s->s3->tmp.reuse_message=1;
1324 1324 return(1);
1325 1325 }
1326 1326
1327 1327 param=p=(unsigned char *)s->init_msg;
1328 1328 if (s->session->sess_cert != NULL)
1329 1329 {
1330 1330 #ifndef OPENSSL_NO_RSA
1331 1331 if (s->session->sess_cert->peer_rsa_tmp != NULL)
1332 1332 {
1333 1333 RSA_free(s->session->sess_cert->peer_rsa_tmp);
1334 1334 s->session->sess_cert->peer_rsa_tmp=NULL;
1335 1335 }
1336 1336 #endif
1337 1337 #ifndef OPENSSL_NO_DH
1338 1338 if (s->session->sess_cert->peer_dh_tmp)
1339 1339 {
1340 1340 DH_free(s->session->sess_cert->peer_dh_tmp);
1341 1341 s->session->sess_cert->peer_dh_tmp=NULL;
1342 1342 }
1343 1343 #endif
1344 1344 #ifndef OPENSSL_NO_ECDH
1345 1345 if (s->session->sess_cert->peer_ecdh_tmp)
1346 1346 {
1347 1347 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp);
1348 1348 s->session->sess_cert->peer_ecdh_tmp=NULL;
1349 1349 }
1350 1350 #endif
1351 1351 }
1352 1352 else
1353 1353 {
1354 1354 s->session->sess_cert=ssl_sess_cert_new();
1355 1355 }
1356 1356
1357 1357 param_len=0;
1358 1358 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
1359 1359 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
1360 1360 EVP_MD_CTX_init(&md_ctx);
1361 1361
1362 1362 #ifndef OPENSSL_NO_PSK
1363 1363 if (alg_k & SSL_kPSK)
1364 1364 {
1365 1365 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1];
1366 1366
1367 1367 al=SSL_AD_HANDSHAKE_FAILURE;
1368 1368 n2s(p,i);
1369 1369 param_len=i+2;
1370 1370 /* Store PSK identity hint for later use, hint is used
1371 1371 * in ssl3_send_client_key_exchange. Assume that the
1372 1372 * maximum length of a PSK identity hint can be as
1373 1373 * long as the maximum length of a PSK identity. */
1374 1374 if (i > PSK_MAX_IDENTITY_LEN)
1375 1375 {
1376 1376 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1377 1377 SSL_R_DATA_LENGTH_TOO_LONG);
1378 1378 goto f_err;
1379 1379 }
1380 1380 if (param_len > n)
1381 1381 {
1382 1382 al=SSL_AD_DECODE_ERROR;
1383 1383 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,
1384 1384 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH);
1385 1385 goto f_err;
1386 1386 }
1387 1387 /* If received PSK identity hint contains NULL
1388 1388 * characters, the hint is truncated from the first
1389 1389 * NULL. p may not be ending with NULL, so create a
1390 1390 * NULL-terminated string. */
1391 1391 memcpy(tmp_id_hint, p, i);
1392 1392 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i);
1393 1393 if (s->ctx->psk_identity_hint != NULL)
1394 1394 OPENSSL_free(s->ctx->psk_identity_hint);
1395 1395 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint);
1396 1396 if (s->ctx->psk_identity_hint == NULL)
1397 1397 {
1398 1398 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE);
1399 1399 goto f_err;
1400 1400 }
1401 1401
1402 1402 p+=i;
1403 1403 n-=param_len;
1404 1404 }
1405 1405 else
1406 1406 #endif /* !OPENSSL_NO_PSK */
1407 1407 #ifndef OPENSSL_NO_SRP
1408 1408 if (alg_k & SSL_kSRP)
1409 1409 {
1410 1410 n2s(p,i);
1411 1411 param_len=i+2;
1412 1412 if (param_len > n)
1413 1413 {
1414 1414 al=SSL_AD_DECODE_ERROR;
1415 1415 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH);
1416 1416 goto f_err;
1417 1417 }
1418 1418 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL)))
1419 1419 {
1420 1420 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1421 1421 goto err;
1422 1422 }
1423 1423 p+=i;
1424 1424
1425 1425 n2s(p,i);
1426 1426 param_len+=i+2;
1427 1427 if (param_len > n)
1428 1428 {
1429 1429 al=SSL_AD_DECODE_ERROR;
1430 1430 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH);
1431 1431 goto f_err;
1432 1432 }
1433 1433 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL)))
1434 1434 {
1435 1435 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1436 1436 goto err;
1437 1437 }
1438 1438 p+=i;
1439 1439
1440 1440 i = (unsigned int)(p[0]);
1441 1441 p++;
1442 1442 param_len+=i+1;
1443 1443 if (param_len > n)
1444 1444 {
1445 1445 al=SSL_AD_DECODE_ERROR;
1446 1446 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH);
1447 1447 goto f_err;
1448 1448 }
1449 1449 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL)))
1450 1450 {
1451 1451 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1452 1452 goto err;
1453 1453 }
1454 1454 p+=i;
1455 1455
1456 1456 n2s(p,i);
1457 1457 param_len+=i+2;
1458 1458 if (param_len > n)
1459 1459 {
1460 1460 al=SSL_AD_DECODE_ERROR;
1461 1461 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH);
1462 1462 goto f_err;
1463 1463 }
1464 1464 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL)))
1465 1465 {
1466 1466 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1467 1467 goto err;
1468 1468 }
1469 1469 p+=i;
1470 1470 n-=param_len;
1471 1471
1472 1472 if (!srp_verify_server_param(s, &al))
1473 1473 {
1474 1474 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_PARAMETERS);
1475 1475 goto f_err;
1476 1476 }
1477 1477
1478 1478 /* We must check if there is a certificate */
1479 1479 #ifndef OPENSSL_NO_RSA
1480 1480 if (alg_a & SSL_aRSA)
1481 1481 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1482 1482 #else
1483 1483 if (0)
1484 1484 ;
1485 1485 #endif
1486 1486 #ifndef OPENSSL_NO_DSA
1487 1487 else if (alg_a & SSL_aDSS)
1488 1488 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1489 1489 #endif
1490 1490 }
1491 1491 else
1492 1492 #endif /* !OPENSSL_NO_SRP */
1493 1493 #ifndef OPENSSL_NO_RSA
1494 1494 if (alg_k & SSL_kRSA)
1495 1495 {
1496 1496 if ((rsa=RSA_new()) == NULL)
1497 1497 {
1498 1498 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1499 1499 goto err;
1500 1500 }
1501 1501 n2s(p,i);
1502 1502 param_len=i+2;
1503 1503 if (param_len > n)
1504 1504 {
1505 1505 al=SSL_AD_DECODE_ERROR;
1506 1506 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH);
1507 1507 goto f_err;
1508 1508 }
1509 1509 if (!(rsa->n=BN_bin2bn(p,i,rsa->n)))
1510 1510 {
1511 1511 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1512 1512 goto err;
1513 1513 }
1514 1514 p+=i;
1515 1515
1516 1516 n2s(p,i);
1517 1517 param_len+=i+2;
1518 1518 if (param_len > n)
1519 1519 {
1520 1520 al=SSL_AD_DECODE_ERROR;
1521 1521 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH);
1522 1522 goto f_err;
1523 1523 }
1524 1524 if (!(rsa->e=BN_bin2bn(p,i,rsa->e)))
1525 1525 {
1526 1526 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1527 1527 goto err;
1528 1528 }
1529 1529 p+=i;
1530 1530 n-=param_len;
1531 1531
1532 1532 /* this should be because we are using an export cipher */
1533 1533 if (alg_a & SSL_aRSA)
1534 1534 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1535 1535 else
1536 1536 {
1537 1537 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1538 1538 goto err;
1539 1539 }
1540 1540 s->session->sess_cert->peer_rsa_tmp=rsa;
1541 1541 rsa=NULL;
1542 1542 }
1543 1543 #else /* OPENSSL_NO_RSA */
1544 1544 if (0)
1545 1545 ;
1546 1546 #endif
1547 1547 #ifndef OPENSSL_NO_DH
1548 1548 else if (alg_k & SSL_kEDH)
1549 1549 {
1550 1550 if ((dh=DH_new()) == NULL)
1551 1551 {
1552 1552 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB);
1553 1553 goto err;
1554 1554 }
1555 1555 n2s(p,i);
1556 1556 param_len=i+2;
1557 1557 if (param_len > n)
1558 1558 {
1559 1559 al=SSL_AD_DECODE_ERROR;
1560 1560 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH);
1561 1561 goto f_err;
1562 1562 }
1563 1563 if (!(dh->p=BN_bin2bn(p,i,NULL)))
1564 1564 {
1565 1565 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1566 1566 goto err;
1567 1567 }
1568 1568 p+=i;
1569 1569
1570 1570 n2s(p,i);
1571 1571 param_len+=i+2;
1572 1572 if (param_len > n)
1573 1573 {
1574 1574 al=SSL_AD_DECODE_ERROR;
1575 1575 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH);
1576 1576 goto f_err;
1577 1577 }
1578 1578 if (!(dh->g=BN_bin2bn(p,i,NULL)))
1579 1579 {
1580 1580 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1581 1581 goto err;
1582 1582 }
1583 1583 p+=i;
1584 1584
1585 1585 n2s(p,i);
1586 1586 param_len+=i+2;
1587 1587 if (param_len > n)
1588 1588 {
1589 1589 al=SSL_AD_DECODE_ERROR;
1590 1590 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH);
1591 1591 goto f_err;
1592 1592 }
1593 1593 if (!(dh->pub_key=BN_bin2bn(p,i,NULL)))
1594 1594 {
1595 1595 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB);
1596 1596 goto err;
1597 1597 }
1598 1598 p+=i;
1599 1599 n-=param_len;
1600 1600
1601 1601 #ifndef OPENSSL_NO_RSA
1602 1602 if (alg_a & SSL_aRSA)
1603 1603 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1604 1604 #else
1605 1605 if (0)
1606 1606 ;
1607 1607 #endif
1608 1608 #ifndef OPENSSL_NO_DSA
1609 1609 else if (alg_a & SSL_aDSS)
1610 1610 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509);
1611 1611 #endif
1612 1612 /* else anonymous DH, so no certificate or pkey. */
1613 1613
1614 1614 s->session->sess_cert->peer_dh_tmp=dh;
1615 1615 dh=NULL;
1616 1616 }
1617 1617 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd))
1618 1618 {
1619 1619 al=SSL_AD_ILLEGAL_PARAMETER;
1620 1620 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER);
1621 1621 goto f_err;
1622 1622 }
1623 1623 #endif /* !OPENSSL_NO_DH */
1624 1624
1625 1625 #ifndef OPENSSL_NO_ECDH
1626 1626 else if (alg_k & SSL_kEECDH)
1627 1627 {
1628 1628 EC_GROUP *ngroup;
1629 1629 const EC_GROUP *group;
1630 1630
1631 1631 if ((ecdh=EC_KEY_new()) == NULL)
1632 1632 {
1633 1633 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1634 1634 goto err;
1635 1635 }
1636 1636
1637 1637 /* Extract elliptic curve parameters and the
1638 1638 * server's ephemeral ECDH public key.
1639 1639 * Keep accumulating lengths of various components in
1640 1640 * param_len and make sure it never exceeds n.
1641 1641 */
1642 1642
1643 1643 /* XXX: For now we only support named (not generic) curves
1644 1644 * and the ECParameters in this case is just three bytes.
1645 1645 */
1646 1646 param_len=3;
1647 1647 if ((param_len > n) ||
1648 1648 (*p != NAMED_CURVE_TYPE) ||
1649 1649 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0))
1650 1650 {
1651 1651 al=SSL_AD_INTERNAL_ERROR;
1652 1652 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS);
1653 1653 goto f_err;
1654 1654 }
1655 1655
1656 1656 ngroup = EC_GROUP_new_by_curve_name(curve_nid);
1657 1657 if (ngroup == NULL)
1658 1658 {
1659 1659 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1660 1660 goto err;
1661 1661 }
1662 1662 if (EC_KEY_set_group(ecdh, ngroup) == 0)
1663 1663 {
1664 1664 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB);
1665 1665 goto err;
1666 1666 }
1667 1667 EC_GROUP_free(ngroup);
1668 1668
1669 1669 group = EC_KEY_get0_group(ecdh);
1670 1670
1671 1671 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) &&
1672 1672 (EC_GROUP_get_degree(group) > 163))
1673 1673 {
1674 1674 al=SSL_AD_EXPORT_RESTRICTION;
1675 1675 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER);
1676 1676 goto f_err;
1677 1677 }
1678 1678
1679 1679 p+=3;
1680 1680
1681 1681 /* Next, get the encoded ECPoint */
1682 1682 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) ||
1683 1683 ((bn_ctx = BN_CTX_new()) == NULL))
1684 1684 {
1685 1685 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
1686 1686 goto err;
1687 1687 }
1688 1688
1689 1689 encoded_pt_len = *p; /* length of encoded point */
1690 1690 p+=1;
1691 1691 param_len += (1 + encoded_pt_len);
1692 1692 if ((param_len > n) ||
1693 1693 (EC_POINT_oct2point(group, srvr_ecpoint,
1694 1694 p, encoded_pt_len, bn_ctx) == 0))
1695 1695 {
1696 1696 al=SSL_AD_DECODE_ERROR;
1697 1697 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT);
1698 1698 goto f_err;
1699 1699 }
1700 1700
1701 1701 n-=param_len;
1702 1702 p+=encoded_pt_len;
1703 1703
1704 1704 /* The ECC/TLS specification does not mention
1705 1705 * the use of DSA to sign ECParameters in the server
1706 1706 * key exchange message. We do support RSA and ECDSA.
1707 1707 */
1708 1708 if (0) ;
1709 1709 #ifndef OPENSSL_NO_RSA
1710 1710 else if (alg_a & SSL_aRSA)
1711 1711 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
1712 1712 #endif
1713 1713 #ifndef OPENSSL_NO_ECDSA
1714 1714 else if (alg_a & SSL_aECDSA)
1715 1715 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
1716 1716 #endif
1717 1717 /* else anonymous ECDH, so no certificate or pkey. */
1718 1718 EC_KEY_set_public_key(ecdh, srvr_ecpoint);
1719 1719 s->session->sess_cert->peer_ecdh_tmp=ecdh;
1720 1720 ecdh=NULL;
1721 1721 BN_CTX_free(bn_ctx);
1722 1722 bn_ctx = NULL;
1723 1723 EC_POINT_free(srvr_ecpoint);
1724 1724 srvr_ecpoint = NULL;
1725 1725 }
1726 1726 else if (alg_k)
1727 1727 {
1728 1728 al=SSL_AD_UNEXPECTED_MESSAGE;
1729 1729 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
1730 1730 goto f_err;
1731 1731 }
1732 1732 #endif /* !OPENSSL_NO_ECDH */
1733 1733
1734 1734
1735 1735 /* p points to the next byte, there are 'n' bytes left */
1736 1736
1737 1737 /* if it was signed, check the signature */
1738 1738 if (pkey != NULL)
1739 1739 {
1740 1740 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1741 1741 {
1742 1742 int sigalg = tls12_get_sigid(pkey);
1743 1743 /* Should never happen */
1744 1744 if (sigalg == -1)
1745 1745 {
1746 1746 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1747 1747 goto err;
1748 1748 }
1749 1749 /* Check key type is consistent with signature */
1750 1750 if (sigalg != (int)p[1])
1751 1751 {
1752 1752 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE);
1753 1753 al=SSL_AD_DECODE_ERROR;
1754 1754 goto f_err;
1755 1755 }
1756 1756 md = tls12_get_hash(p[0]);
1757 1757 if (md == NULL)
1758 1758 {
1759 1759 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST);
1760 1760 al=SSL_AD_DECODE_ERROR;
1761 1761 goto f_err;
1762 1762 }
1763 1763 #ifdef SSL_DEBUG
1764 1764 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md));
1765 1765 #endif
1766 1766 p += 2;
1767 1767 n -= 2;
1768 1768 }
1769 1769 else
1770 1770 md = EVP_sha1();
1771 1771
1772 1772 n2s(p,i);
1773 1773 n-=2;
1774 1774 j=EVP_PKEY_size(pkey);
1775 1775
1776 1776 if ((i != n) || (n > j) || (n <= 0))
1777 1777 {
1778 1778 /* wrong packet length */
1779 1779 al=SSL_AD_DECODE_ERROR;
1780 1780 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH);
1781 1781 goto f_err;
1782 1782 }
1783 1783
1784 1784 #ifndef OPENSSL_NO_RSA
1785 1785 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION)
1786 1786 {
1787 1787 int num;
1788 1788
1789 1789 j=0;
1790 1790 q=md_buf;
1791 1791 for (num=2; num > 0; num--)
1792 1792 {
1793 1793 EVP_MD_CTX_set_flags(&md_ctx,
1794 1794 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW);
1795 1795 EVP_DigestInit_ex(&md_ctx,(num == 2)
1796 1796 ?s->ctx->md5:s->ctx->sha1, NULL);
1797 1797 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1798 1798 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1799 1799 EVP_DigestUpdate(&md_ctx,param,param_len);
1800 1800 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i);
1801 1801 q+=i;
1802 1802 j+=i;
1803 1803 }
1804 1804 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n,
1805 1805 pkey->pkey.rsa);
1806 1806 if (i < 0)
1807 1807 {
1808 1808 al=SSL_AD_DECRYPT_ERROR;
1809 1809 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT);
1810 1810 goto f_err;
1811 1811 }
1812 1812 if (i == 0)
1813 1813 {
1814 1814 /* bad signature */
1815 1815 al=SSL_AD_DECRYPT_ERROR;
1816 1816 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1817 1817 goto f_err;
1818 1818 }
1819 1819 }
1820 1820 else
1821 1821 #endif
1822 1822 {
1823 1823 EVP_VerifyInit_ex(&md_ctx, md, NULL);
1824 1824 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE);
1825 1825 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE);
1826 1826 EVP_VerifyUpdate(&md_ctx,param,param_len);
1827 1827 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0)
1828 1828 {
1829 1829 /* bad signature */
1830 1830 al=SSL_AD_DECRYPT_ERROR;
1831 1831 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE);
1832 1832 goto f_err;
1833 1833 }
1834 1834 }
1835 1835 }
1836 1836 else
1837 1837 {
1838 1838 if (!(alg_a & SSL_aNULL) && !(alg_k & SSL_kPSK))
1839 1839 /* aNULL or kPSK do not need public keys */
1840 1840 {
1841 1841 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
1842 1842 goto err;
1843 1843 }
1844 1844 /* still data left over */
1845 1845 if (n != 0)
1846 1846 {
1847 1847 al=SSL_AD_DECODE_ERROR;
1848 1848 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE);
1849 1849 goto f_err;
1850 1850 }
1851 1851 }
1852 1852 EVP_PKEY_free(pkey);
1853 1853 EVP_MD_CTX_cleanup(&md_ctx);
1854 1854 return(1);
1855 1855 f_err:
1856 1856 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1857 1857 err:
1858 1858 EVP_PKEY_free(pkey);
1859 1859 #ifndef OPENSSL_NO_RSA
1860 1860 if (rsa != NULL)
1861 1861 RSA_free(rsa);
1862 1862 #endif
1863 1863 #ifndef OPENSSL_NO_DH
1864 1864 if (dh != NULL)
1865 1865 DH_free(dh);
1866 1866 #endif
1867 1867 #ifndef OPENSSL_NO_ECDH
1868 1868 BN_CTX_free(bn_ctx);
1869 1869 EC_POINT_free(srvr_ecpoint);
1870 1870 if (ecdh != NULL)
1871 1871 EC_KEY_free(ecdh);
1872 1872 #endif
1873 1873 EVP_MD_CTX_cleanup(&md_ctx);
1874 1874 return(-1);
1875 1875 }
1876 1876
1877 1877 int ssl3_get_certificate_request(SSL *s)
1878 1878 {
1879 1879 int ok,ret=0;
1880 1880 unsigned long n,nc,l;
1881 1881 unsigned int llen, ctype_num,i;
1882 1882 X509_NAME *xn=NULL;
1883 1883 const unsigned char *p,*q;
1884 1884 unsigned char *d;
1885 1885 STACK_OF(X509_NAME) *ca_sk=NULL;
1886 1886
1887 1887 n=s->method->ssl_get_message(s,
1888 1888 SSL3_ST_CR_CERT_REQ_A,
1889 1889 SSL3_ST_CR_CERT_REQ_B,
1890 1890 -1,
1891 1891 s->max_cert_list,
1892 1892 &ok);
1893 1893
1894 1894 if (!ok) return((int)n);
1895 1895
1896 1896 s->s3->tmp.cert_req=0;
1897 1897
1898 1898 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE)
1899 1899 {
1900 1900 s->s3->tmp.reuse_message=1;
1901 1901 /* If we get here we don't need any cached handshake records
1902 1902 * as we wont be doing client auth.
1903 1903 */
1904 1904 if (s->s3->handshake_buffer)
1905 1905 {
1906 1906 if (!ssl3_digest_cached_records(s))
1907 1907 goto err;
1908 1908 }
1909 1909 return(1);
1910 1910 }
1911 1911
1912 1912 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST)
1913 1913 {
1914 1914 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1915 1915 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE);
1916 1916 goto err;
1917 1917 }
1918 1918
1919 1919 /* TLS does not like anon-DH with client cert */
1920 1920 if (s->version > SSL3_VERSION)
1921 1921 {
1922 1922 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL)
1923 1923 {
1924 1924 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
1925 1925 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER);
1926 1926 goto err;
1927 1927 }
1928 1928 }
1929 1929
1930 1930 p=d=(unsigned char *)s->init_msg;
1931 1931
1932 1932 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL)
1933 1933 {
1934 1934 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
1935 1935 goto err;
1936 1936 }
1937 1937
1938 1938 /* get the certificate types */
1939 1939 ctype_num= *(p++);
1940 1940 if (ctype_num > SSL3_CT_NUMBER)
1941 1941 ctype_num=SSL3_CT_NUMBER;
1942 1942 for (i=0; i<ctype_num; i++)
1943 1943 s->s3->tmp.ctype[i]= p[i];
1944 1944 p+=ctype_num;
1945 1945 if (TLS1_get_version(s) >= TLS1_2_VERSION)
1946 1946 {
1947 1947 n2s(p, llen);
1948 1948 /* Check we have enough room for signature algorithms and
1949 1949 * following length value.
1950 1950 */
1951 1951 if ((unsigned long)(p - d + llen + 2) > n)
1952 1952 {
1953 1953 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1954 1954 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG);
1955 1955 goto err;
1956 1956 }
1957 1957 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen))
1958 1958 {
1959 1959 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1960 1960 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR);
1961 1961 goto err;
1962 1962 }
1963 1963 p += llen;
1964 1964 }
1965 1965
1966 1966 /* get the CA RDNs */
1967 1967 n2s(p,llen);
1968 1968 #if 0
1969 1969 {
1970 1970 FILE *out;
1971 1971 out=fopen("/tmp/vsign.der","w");
1972 1972 fwrite(p,1,llen,out);
1973 1973 fclose(out);
1974 1974 }
1975 1975 #endif
1976 1976
1977 1977 if ((unsigned long)(p - d + llen) != n)
1978 1978 {
1979 1979 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1980 1980 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH);
1981 1981 goto err;
1982 1982 }
1983 1983
1984 1984 for (nc=0; nc<llen; )
1985 1985 {
1986 1986 n2s(p,l);
1987 1987 if ((l+nc+2) > llen)
1988 1988 {
1989 1989 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG))
1990 1990 goto cont; /* netscape bugs */
1991 1991 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
1992 1992 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG);
1993 1993 goto err;
1994 1994 }
1995 1995
1996 1996 q=p;
1997 1997
1998 1998 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL)
1999 1999 {
2000 2000 /* If netscape tolerance is on, ignore errors */
2001 2001 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG)
2002 2002 goto cont;
2003 2003 else
2004 2004 {
2005 2005 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2006 2006 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB);
2007 2007 goto err;
2008 2008 }
2009 2009 }
2010 2010
2011 2011 if (q != (p+l))
2012 2012 {
2013 2013 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2014 2014 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH);
2015 2015 goto err;
2016 2016 }
2017 2017 if (!sk_X509_NAME_push(ca_sk,xn))
2018 2018 {
2019 2019 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE);
2020 2020 goto err;
2021 2021 }
2022 2022
2023 2023 p+=l;
2024 2024 nc+=l+2;
2025 2025 }
2026 2026
2027 2027 if (0)
2028 2028 {
2029 2029 cont:
2030 2030 ERR_clear_error();
2031 2031 }
2032 2032
2033 2033 /* we should setup a certificate to return.... */
2034 2034 s->s3->tmp.cert_req=1;
2035 2035 s->s3->tmp.ctype_num=ctype_num;
2036 2036 if (s->s3->tmp.ca_names != NULL)
2037 2037 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free);
2038 2038 s->s3->tmp.ca_names=ca_sk;
2039 2039 ca_sk=NULL;
2040 2040
2041 2041 ret=1;
2042 2042 err:
2043 2043 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free);
2044 2044 return(ret);
2045 2045 }
2046 2046
2047 2047 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b)
2048 2048 {
2049 2049 return(X509_NAME_cmp(*a,*b));
2050 2050 }
2051 2051 #ifndef OPENSSL_NO_TLSEXT
2052 2052 int ssl3_get_new_session_ticket(SSL *s)
2053 2053 {
2054 2054 int ok,al,ret=0, ticklen;
2055 2055 long n;
2056 2056 const unsigned char *p;
2057 2057 unsigned char *d;
2058 2058
2059 2059 n=s->method->ssl_get_message(s,
2060 2060 SSL3_ST_CR_SESSION_TICKET_A,
2061 2061 SSL3_ST_CR_SESSION_TICKET_B,
2062 2062 -1,
2063 2063 16384,
2064 2064 &ok);
2065 2065
2066 2066 if (!ok)
2067 2067 return((int)n);
2068 2068
2069 2069 if (s->s3->tmp.message_type == SSL3_MT_FINISHED)
2070 2070 {
2071 2071 s->s3->tmp.reuse_message=1;
2072 2072 return(1);
2073 2073 }
2074 2074 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET)
2075 2075 {
2076 2076 al=SSL_AD_UNEXPECTED_MESSAGE;
2077 2077 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE);
2078 2078 goto f_err;
2079 2079 }
2080 2080 if (n < 6)
2081 2081 {
2082 2082 /* need at least ticket_lifetime_hint + ticket length */
2083 2083 al = SSL_AD_DECODE_ERROR;
2084 2084 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2085 2085 goto f_err;
2086 2086 }
2087 2087
2088 2088 p=d=(unsigned char *)s->init_msg;
2089 2089 n2l(p, s->session->tlsext_tick_lifetime_hint);
2090 2090 n2s(p, ticklen);
2091 2091 /* ticket_lifetime_hint + ticket_length + ticket */
2092 2092 if (ticklen + 6 != n)
2093 2093 {
2094 2094 al = SSL_AD_DECODE_ERROR;
2095 2095 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH);
2096 2096 goto f_err;
2097 2097 }
2098 2098 if (s->session->tlsext_tick)
2099 2099 {
2100 2100 OPENSSL_free(s->session->tlsext_tick);
2101 2101 s->session->tlsext_ticklen = 0;
2102 2102 }
2103 2103 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
2104 2104 if (!s->session->tlsext_tick)
2105 2105 {
2106 2106 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE);
2107 2107 goto err;
2108 2108 }
2109 2109 memcpy(s->session->tlsext_tick, p, ticklen);
2110 2110 s->session->tlsext_ticklen = ticklen;
2111 2111 /* There are two ways to detect a resumed ticket sesion.
2112 2112 * One is to set an appropriate session ID and then the server
2113 2113 * must return a match in ServerHello. This allows the normal
2114 2114 * client session ID matching to work and we know much
2115 2115 * earlier that the ticket has been accepted.
2116 2116 *
2117 2117 * The other way is to set zero length session ID when the
2118 2118 * ticket is presented and rely on the handshake to determine
2119 2119 * session resumption.
2120 2120 *
2121 2121 * We choose the former approach because this fits in with
2122 2122 * assumptions elsewhere in OpenSSL. The session ID is set
2123 2123 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the
2124 2124 * ticket.
2125 2125 */
2126 2126 EVP_Digest(p, ticklen,
2127 2127 s->session->session_id, &s->session->session_id_length,
2128 2128 #ifndef OPENSSL_NO_SHA256
2129 2129 EVP_sha256(), NULL);
2130 2130 #else
2131 2131 EVP_sha1(), NULL);
2132 2132 #endif
2133 2133 ret=1;
2134 2134 return(ret);
2135 2135 f_err:
2136 2136 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2137 2137 err:
2138 2138 return(-1);
2139 2139 }
2140 2140
2141 2141 int ssl3_get_cert_status(SSL *s)
2142 2142 {
2143 2143 int ok, al;
2144 2144 unsigned long resplen,n;
2145 2145 const unsigned char *p;
2146 2146
2147 2147 n=s->method->ssl_get_message(s,
2148 2148 SSL3_ST_CR_CERT_STATUS_A,
2149 2149 SSL3_ST_CR_CERT_STATUS_B,
2150 2150 SSL3_MT_CERTIFICATE_STATUS,
2151 2151 16384,
2152 2152 &ok);
2153 2153
2154 2154 if (!ok) return((int)n);
2155 2155 if (n < 4)
2156 2156 {
2157 2157 /* need at least status type + length */
2158 2158 al = SSL_AD_DECODE_ERROR;
2159 2159 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2160 2160 goto f_err;
2161 2161 }
2162 2162 p = (unsigned char *)s->init_msg;
2163 2163 if (*p++ != TLSEXT_STATUSTYPE_ocsp)
2164 2164 {
2165 2165 al = SSL_AD_DECODE_ERROR;
2166 2166 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE);
2167 2167 goto f_err;
2168 2168 }
2169 2169 n2l3(p, resplen);
2170 2170 if (resplen + 4 != n)
2171 2171 {
2172 2172 al = SSL_AD_DECODE_ERROR;
2173 2173 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH);
2174 2174 goto f_err;
2175 2175 }
2176 2176 if (s->tlsext_ocsp_resp)
2177 2177 OPENSSL_free(s->tlsext_ocsp_resp);
2178 2178 s->tlsext_ocsp_resp = BUF_memdup(p, resplen);
2179 2179 if (!s->tlsext_ocsp_resp)
2180 2180 {
2181 2181 al = SSL_AD_INTERNAL_ERROR;
2182 2182 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2183 2183 goto f_err;
2184 2184 }
2185 2185 s->tlsext_ocsp_resplen = resplen;
2186 2186 if (s->ctx->tlsext_status_cb)
2187 2187 {
2188 2188 int ret;
2189 2189 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2190 2190 if (ret == 0)
2191 2191 {
2192 2192 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2193 2193 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE);
2194 2194 goto f_err;
2195 2195 }
2196 2196 if (ret < 0)
2197 2197 {
2198 2198 al = SSL_AD_INTERNAL_ERROR;
2199 2199 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE);
2200 2200 goto f_err;
2201 2201 }
2202 2202 }
2203 2203 return 1;
2204 2204 f_err:
2205 2205 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2206 2206 return(-1);
2207 2207 }
2208 2208 #endif
2209 2209
2210 2210 int ssl3_get_server_done(SSL *s)
2211 2211 {
2212 2212 int ok,ret=0;
2213 2213 long n;
2214 2214
2215 2215 n=s->method->ssl_get_message(s,
2216 2216 SSL3_ST_CR_SRVR_DONE_A,
2217 2217 SSL3_ST_CR_SRVR_DONE_B,
2218 2218 SSL3_MT_SERVER_DONE,
2219 2219 30, /* should be very small, like 0 :-) */
2220 2220 &ok);
2221 2221
2222 2222 if (!ok) return((int)n);
2223 2223 if (n > 0)
2224 2224 {
2225 2225 /* should contain no data */
2226 2226 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR);
2227 2227 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH);
2228 2228 return -1;
2229 2229 }
2230 2230 ret=1;
2231 2231 return(ret);
2232 2232 }
2233 2233
2234 2234
2235 2235 int ssl3_send_client_key_exchange(SSL *s)
2236 2236 {
2237 2237 unsigned char *p,*d;
2238 2238 int n;
2239 2239 unsigned long alg_k;
2240 2240 #ifndef OPENSSL_NO_RSA
2241 2241 unsigned char *q;
2242 2242 EVP_PKEY *pkey=NULL;
2243 2243 #endif
2244 2244 #ifndef OPENSSL_NO_KRB5
2245 2245 KSSL_ERR kssl_err;
2246 2246 #endif /* OPENSSL_NO_KRB5 */
2247 2247 #ifndef OPENSSL_NO_ECDH
2248 2248 EC_KEY *clnt_ecdh = NULL;
2249 2249 const EC_POINT *srvr_ecpoint = NULL;
2250 2250 EVP_PKEY *srvr_pub_pkey = NULL;
2251 2251 unsigned char *encodedPoint = NULL;
2252 2252 int encoded_pt_len = 0;
2253 2253 BN_CTX * bn_ctx = NULL;
2254 2254 #endif
2255 2255
2256 2256 if (s->state == SSL3_ST_CW_KEY_EXCH_A)
2257 2257 {
2258 2258 d=(unsigned char *)s->init_buf->data;
2259 2259 p= &(d[4]);
2260 2260
2261 2261 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
2262 2262
2263 2263 /* Fool emacs indentation */
2264 2264 if (0) {}
2265 2265 #ifndef OPENSSL_NO_RSA
2266 2266 else if (alg_k & SSL_kRSA)
2267 2267 {
|
↓ open down ↓ |
2267 lines elided |
↑ open up ↑ |
2268 2268 RSA *rsa;
2269 2269 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2270 2270
2271 2271 if (s->session->sess_cert == NULL)
2272 2272 {
2273 2273 /* We should always have a server certificate with SSL_kRSA. */
2274 2274 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2275 2275 goto err;
2276 2276 }
2277 2277
2278 +
2278 2279 if (s->session->sess_cert->peer_rsa_tmp != NULL)
2279 2280 rsa=s->session->sess_cert->peer_rsa_tmp;
2280 2281 else
2281 2282 {
2282 2283 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509);
2283 2284 if ((pkey == NULL) ||
2284 2285 (pkey->type != EVP_PKEY_RSA) ||
2285 2286 (pkey->pkey.rsa == NULL))
2286 2287 {
2287 2288 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2288 2289 goto err;
2289 2290 }
2290 2291 rsa=pkey->pkey.rsa;
2291 2292 EVP_PKEY_free(pkey);
2292 2293 }
2293 2294
2294 2295 tmp_buf[0]=s->client_version>>8;
2295 2296 tmp_buf[1]=s->client_version&0xff;
2296 2297 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2297 2298 goto err;
2298 2299
2299 2300 s->session->master_key_length=sizeof tmp_buf;
2300 2301
2301 2302 q=p;
2302 2303 /* Fix buf for TLS and beyond */
2303 2304 if (s->version > SSL3_VERSION)
2304 2305 p+=2;
2305 2306 n=RSA_public_encrypt(sizeof tmp_buf,
2306 2307 tmp_buf,p,rsa,RSA_PKCS1_PADDING);
2307 2308 #ifdef PKCS1_CHECK
2308 2309 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++;
2309 2310 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70;
2310 2311 #endif
2311 2312 if (n <= 0)
2312 2313 {
2313 2314 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT);
2314 2315 goto err;
2315 2316 }
2316 2317
2317 2318 /* Fix buf for TLS and beyond */
2318 2319 if (s->version > SSL3_VERSION)
2319 2320 {
2320 2321 s2n(n,q);
2321 2322 n+=2;
2322 2323 }
2323 2324
2324 2325 s->session->master_key_length=
2325 2326 s->method->ssl3_enc->generate_master_secret(s,
2326 2327 s->session->master_key,
2327 2328 tmp_buf,sizeof tmp_buf);
2328 2329 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf);
2329 2330 }
2330 2331 #endif
2331 2332 #ifndef OPENSSL_NO_KRB5
2332 2333 else if (alg_k & SSL_kKRB5)
2333 2334 {
2334 2335 krb5_error_code krb5rc;
2335 2336 KSSL_CTX *kssl_ctx = s->kssl_ctx;
2336 2337 /* krb5_data krb5_ap_req; */
2337 2338 krb5_data *enc_ticket;
2338 2339 krb5_data authenticator, *authp = NULL;
2339 2340 EVP_CIPHER_CTX ciph_ctx;
2340 2341 const EVP_CIPHER *enc = NULL;
2341 2342 unsigned char iv[EVP_MAX_IV_LENGTH];
2342 2343 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH];
2343 2344 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH
2344 2345 + EVP_MAX_IV_LENGTH];
2345 2346 int padl, outl = sizeof(epms);
2346 2347
2347 2348 EVP_CIPHER_CTX_init(&ciph_ctx);
2348 2349
2349 2350 #ifdef KSSL_DEBUG
2350 2351 printf("ssl3_send_client_key_exchange(%lx & %lx)\n",
2351 2352 alg_k, SSL_kKRB5);
2352 2353 #endif /* KSSL_DEBUG */
2353 2354
2354 2355 authp = NULL;
2355 2356 #ifdef KRB5SENDAUTH
2356 2357 if (KRB5SENDAUTH) authp = &authenticator;
2357 2358 #endif /* KRB5SENDAUTH */
2358 2359
2359 2360 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp,
2360 2361 &kssl_err);
2361 2362 enc = kssl_map_enc(kssl_ctx->enctype);
2362 2363 if (enc == NULL)
2363 2364 goto err;
2364 2365 #ifdef KSSL_DEBUG
2365 2366 {
2366 2367 printf("kssl_cget_tkt rtn %d\n", krb5rc);
2367 2368 if (krb5rc && kssl_err.text)
2368 2369 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text);
2369 2370 }
2370 2371 #endif /* KSSL_DEBUG */
2371 2372
2372 2373 if (krb5rc)
2373 2374 {
2374 2375 ssl3_send_alert(s,SSL3_AL_FATAL,
2375 2376 SSL_AD_HANDSHAKE_FAILURE);
2376 2377 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2377 2378 kssl_err.reason);
2378 2379 goto err;
2379 2380 }
2380 2381
2381 2382 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ
2382 2383 ** in place of RFC 2712 KerberosWrapper, as in:
2383 2384 **
2384 2385 ** Send ticket (copy to *p, set n = length)
2385 2386 ** n = krb5_ap_req.length;
2386 2387 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length);
2387 2388 ** if (krb5_ap_req.data)
2388 2389 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req);
2389 2390 **
2390 2391 ** Now using real RFC 2712 KerberosWrapper
2391 2392 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>)
2392 2393 ** Note: 2712 "opaque" types are here replaced
2393 2394 ** with a 2-byte length followed by the value.
2394 2395 ** Example:
2395 2396 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms
2396 2397 ** Where "xx xx" = length bytes. Shown here with
2397 2398 ** optional authenticator omitted.
2398 2399 */
2399 2400
2400 2401 /* KerberosWrapper.Ticket */
2401 2402 s2n(enc_ticket->length,p);
2402 2403 memcpy(p, enc_ticket->data, enc_ticket->length);
2403 2404 p+= enc_ticket->length;
2404 2405 n = enc_ticket->length + 2;
2405 2406
2406 2407 /* KerberosWrapper.Authenticator */
2407 2408 if (authp && authp->length)
2408 2409 {
2409 2410 s2n(authp->length,p);
2410 2411 memcpy(p, authp->data, authp->length);
2411 2412 p+= authp->length;
2412 2413 n+= authp->length + 2;
2413 2414
2414 2415 free(authp->data);
2415 2416 authp->data = NULL;
2416 2417 authp->length = 0;
2417 2418 }
2418 2419 else
2419 2420 {
2420 2421 s2n(0,p);/* null authenticator length */
2421 2422 n+=2;
2422 2423 }
2423 2424
2424 2425 tmp_buf[0]=s->client_version>>8;
2425 2426 tmp_buf[1]=s->client_version&0xff;
2426 2427 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0)
2427 2428 goto err;
2428 2429
2429 2430 /* 20010420 VRS. Tried it this way; failed.
2430 2431 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL);
2431 2432 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx,
2432 2433 ** kssl_ctx->length);
2433 2434 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv);
2434 2435 */
2435 2436
2436 2437 memset(iv, 0, sizeof iv); /* per RFC 1510 */
2437 2438 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,
2438 2439 kssl_ctx->key,iv);
2439 2440 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf,
2440 2441 sizeof tmp_buf);
2441 2442 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl);
2442 2443 outl += padl;
2443 2444 if (outl > (int)sizeof epms)
2444 2445 {
2445 2446 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR);
2446 2447 goto err;
2447 2448 }
2448 2449 EVP_CIPHER_CTX_cleanup(&ciph_ctx);
2449 2450
2450 2451 /* KerberosWrapper.EncryptedPreMasterSecret */
2451 2452 s2n(outl,p);
2452 2453 memcpy(p, epms, outl);
2453 2454 p+=outl;
2454 2455 n+=outl + 2;
2455 2456
2456 2457 s->session->master_key_length=
2457 2458 s->method->ssl3_enc->generate_master_secret(s,
2458 2459 s->session->master_key,
2459 2460 tmp_buf, sizeof tmp_buf);
2460 2461
2461 2462 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf);
2462 2463 OPENSSL_cleanse(epms, outl);
2463 2464 }
2464 2465 #endif
2465 2466 #ifndef OPENSSL_NO_DH
2466 2467 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
2467 2468 {
2468 2469 DH *dh_srvr,*dh_clnt;
2469 2470
2470 2471 if (s->session->sess_cert == NULL)
2471 2472 {
2472 2473 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2473 2474 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2474 2475 goto err;
2475 2476 }
2476 2477
2477 2478 if (s->session->sess_cert->peer_dh_tmp != NULL)
2478 2479 dh_srvr=s->session->sess_cert->peer_dh_tmp;
2479 2480 else
2480 2481 {
2481 2482 /* we get them from the cert */
2482 2483 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
2483 2484 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS);
2484 2485 goto err;
2485 2486 }
2486 2487
2487 2488 /* generate a new random key */
2488 2489 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL)
2489 2490 {
2490 2491 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2491 2492 goto err;
2492 2493 }
2493 2494 if (!DH_generate_key(dh_clnt))
2494 2495 {
2495 2496 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2496 2497 DH_free(dh_clnt);
2497 2498 goto err;
2498 2499 }
2499 2500
2500 2501 /* use the 'p' output buffer for the DH key, but
2501 2502 * make sure to clear it out afterwards */
2502 2503
2503 2504 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt);
2504 2505
2505 2506 if (n <= 0)
2506 2507 {
2507 2508 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB);
2508 2509 DH_free(dh_clnt);
2509 2510 goto err;
2510 2511 }
2511 2512
2512 2513 /* generate master key from the result */
2513 2514 s->session->master_key_length=
2514 2515 s->method->ssl3_enc->generate_master_secret(s,
2515 2516 s->session->master_key,p,n);
2516 2517 /* clean up */
2517 2518 memset(p,0,n);
2518 2519
2519 2520 /* send off the data */
2520 2521 n=BN_num_bytes(dh_clnt->pub_key);
2521 2522 s2n(n,p);
2522 2523 BN_bn2bin(dh_clnt->pub_key,p);
2523 2524 n+=2;
2524 2525
2525 2526 DH_free(dh_clnt);
2526 2527
2527 2528 /* perhaps clean things up a bit EAY EAY EAY EAY*/
2528 2529 }
2529 2530 #endif
2530 2531
2531 2532 #ifndef OPENSSL_NO_ECDH
2532 2533 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe))
2533 2534 {
2534 2535 const EC_GROUP *srvr_group = NULL;
2535 2536 EC_KEY *tkey;
2536 2537 int ecdh_clnt_cert = 0;
2537 2538 int field_size = 0;
2538 2539
2539 2540 if (s->session->sess_cert == NULL)
2540 2541 {
2541 2542 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE);
2542 2543 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE);
2543 2544 goto err;
2544 2545 }
2545 2546
2546 2547 /* Did we send out the client's
2547 2548 * ECDH share for use in premaster
2548 2549 * computation as part of client certificate?
2549 2550 * If so, set ecdh_clnt_cert to 1.
2550 2551 */
2551 2552 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL))
2552 2553 {
2553 2554 /* XXX: For now, we do not support client
2554 2555 * authentication using ECDH certificates.
2555 2556 * To add such support, one needs to add
2556 2557 * code that checks for appropriate
2557 2558 * conditions and sets ecdh_clnt_cert to 1.
2558 2559 * For example, the cert have an ECC
2559 2560 * key on the same curve as the server's
2560 2561 * and the key should be authorized for
2561 2562 * key agreement.
2562 2563 *
2563 2564 * One also needs to add code in ssl3_connect
2564 2565 * to skip sending the certificate verify
2565 2566 * message.
2566 2567 *
2567 2568 * if ((s->cert->key->privatekey != NULL) &&
2568 2569 * (s->cert->key->privatekey->type ==
2569 2570 * EVP_PKEY_EC) && ...)
2570 2571 * ecdh_clnt_cert = 1;
2571 2572 */
2572 2573 }
2573 2574
2574 2575 if (s->session->sess_cert->peer_ecdh_tmp != NULL)
2575 2576 {
2576 2577 tkey = s->session->sess_cert->peer_ecdh_tmp;
2577 2578 }
2578 2579 else
2579 2580 {
2580 2581 /* Get the Server Public Key from Cert */
2581 2582 srvr_pub_pkey = X509_get_pubkey(s->session-> \
2582 2583 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509);
2583 2584 if ((srvr_pub_pkey == NULL) ||
2584 2585 (srvr_pub_pkey->type != EVP_PKEY_EC) ||
2585 2586 (srvr_pub_pkey->pkey.ec == NULL))
2586 2587 {
2587 2588 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2588 2589 ERR_R_INTERNAL_ERROR);
2589 2590 goto err;
2590 2591 }
2591 2592
2592 2593 tkey = srvr_pub_pkey->pkey.ec;
2593 2594 }
2594 2595
2595 2596 srvr_group = EC_KEY_get0_group(tkey);
2596 2597 srvr_ecpoint = EC_KEY_get0_public_key(tkey);
2597 2598
2598 2599 if ((srvr_group == NULL) || (srvr_ecpoint == NULL))
2599 2600 {
2600 2601 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2601 2602 ERR_R_INTERNAL_ERROR);
2602 2603 goto err;
2603 2604 }
2604 2605
2605 2606 if ((clnt_ecdh=EC_KEY_new()) == NULL)
2606 2607 {
2607 2608 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2608 2609 goto err;
2609 2610 }
2610 2611
2611 2612 if (!EC_KEY_set_group(clnt_ecdh, srvr_group))
2612 2613 {
2613 2614 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2614 2615 goto err;
2615 2616 }
2616 2617 if (ecdh_clnt_cert)
2617 2618 {
2618 2619 /* Reuse key info from our certificate
2619 2620 * We only need our private key to perform
2620 2621 * the ECDH computation.
2621 2622 */
2622 2623 const BIGNUM *priv_key;
2623 2624 tkey = s->cert->key->privatekey->pkey.ec;
2624 2625 priv_key = EC_KEY_get0_private_key(tkey);
2625 2626 if (priv_key == NULL)
2626 2627 {
2627 2628 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2628 2629 goto err;
2629 2630 }
2630 2631 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key))
2631 2632 {
2632 2633 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB);
2633 2634 goto err;
2634 2635 }
2635 2636 }
2636 2637 else
2637 2638 {
2638 2639 /* Generate a new ECDH key pair */
2639 2640 if (!(EC_KEY_generate_key(clnt_ecdh)))
2640 2641 {
2641 2642 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB);
2642 2643 goto err;
2643 2644 }
2644 2645 }
2645 2646
2646 2647 /* use the 'p' output buffer for the ECDH key, but
2647 2648 * make sure to clear it out afterwards
2648 2649 */
2649 2650
2650 2651 field_size = EC_GROUP_get_degree(srvr_group);
2651 2652 if (field_size <= 0)
2652 2653 {
2653 2654 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2654 2655 ERR_R_ECDH_LIB);
2655 2656 goto err;
2656 2657 }
2657 2658 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL);
2658 2659 if (n <= 0)
2659 2660 {
2660 2661 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2661 2662 ERR_R_ECDH_LIB);
2662 2663 goto err;
2663 2664 }
2664 2665
2665 2666 /* generate master key from the result */
2666 2667 s->session->master_key_length = s->method->ssl3_enc \
2667 2668 -> generate_master_secret(s,
2668 2669 s->session->master_key,
2669 2670 p, n);
2670 2671
2671 2672 memset(p, 0, n); /* clean up */
2672 2673
2673 2674 if (ecdh_clnt_cert)
2674 2675 {
2675 2676 /* Send empty client key exch message */
2676 2677 n = 0;
2677 2678 }
2678 2679 else
2679 2680 {
2680 2681 /* First check the size of encoding and
2681 2682 * allocate memory accordingly.
2682 2683 */
2683 2684 encoded_pt_len =
2684 2685 EC_POINT_point2oct(srvr_group,
2685 2686 EC_KEY_get0_public_key(clnt_ecdh),
2686 2687 POINT_CONVERSION_UNCOMPRESSED,
2687 2688 NULL, 0, NULL);
2688 2689
2689 2690 encodedPoint = (unsigned char *)
2690 2691 OPENSSL_malloc(encoded_pt_len *
2691 2692 sizeof(unsigned char));
2692 2693 bn_ctx = BN_CTX_new();
2693 2694 if ((encodedPoint == NULL) ||
2694 2695 (bn_ctx == NULL))
2695 2696 {
2696 2697 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE);
2697 2698 goto err;
2698 2699 }
2699 2700
2700 2701 /* Encode the public key */
2701 2702 n = EC_POINT_point2oct(srvr_group,
2702 2703 EC_KEY_get0_public_key(clnt_ecdh),
2703 2704 POINT_CONVERSION_UNCOMPRESSED,
2704 2705 encodedPoint, encoded_pt_len, bn_ctx);
2705 2706
2706 2707 *p = n; /* length of encoded point */
2707 2708 /* Encoded point will be copied here */
2708 2709 p += 1;
2709 2710 /* copy the point */
2710 2711 memcpy((unsigned char *)p, encodedPoint, n);
2711 2712 /* increment n to account for length field */
2712 2713 n += 1;
2713 2714 }
2714 2715
2715 2716 /* Free allocated memory */
2716 2717 BN_CTX_free(bn_ctx);
2717 2718 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2718 2719 if (clnt_ecdh != NULL)
2719 2720 EC_KEY_free(clnt_ecdh);
2720 2721 EVP_PKEY_free(srvr_pub_pkey);
2721 2722 }
2722 2723 #endif /* !OPENSSL_NO_ECDH */
2723 2724 else if (alg_k & SSL_kGOST)
2724 2725 {
2725 2726 /* GOST key exchange message creation */
2726 2727 EVP_PKEY_CTX *pkey_ctx;
2727 2728 X509 *peer_cert;
2728 2729 size_t msglen;
2729 2730 unsigned int md_len;
2730 2731 int keytype;
2731 2732 unsigned char premaster_secret[32],shared_ukm[32], tmp[256];
2732 2733 EVP_MD_CTX *ukm_hash;
2733 2734 EVP_PKEY *pub_key;
2734 2735
2735 2736 /* Get server sertificate PKEY and create ctx from it */
2736 2737 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509;
2737 2738 if (!peer_cert)
2738 2739 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509;
2739 2740 if (!peer_cert) {
2740 2741 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER);
2741 2742 goto err;
2742 2743 }
2743 2744
2744 2745 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL);
2745 2746 /* If we have send a certificate, and certificate key
2746 2747
2747 2748 * parameters match those of server certificate, use
2748 2749 * certificate key for key exchange
2749 2750 */
2750 2751
2751 2752 /* Otherwise, generate ephemeral key pair */
2752 2753
2753 2754 EVP_PKEY_encrypt_init(pkey_ctx);
2754 2755 /* Generate session key */
2755 2756 RAND_bytes(premaster_secret,32);
2756 2757 /* If we have client certificate, use its secret as peer key */
2757 2758 if (s->s3->tmp.cert_req && s->cert->key->privatekey) {
2758 2759 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) {
2759 2760 /* If there was an error - just ignore it. Ephemeral key
2760 2761 * would be used
2761 2762 */
2762 2763 ERR_clear_error();
2763 2764 }
2764 2765 }
2765 2766 /* Compute shared IV and store it in algorithm-specific
2766 2767 * context data */
2767 2768 ukm_hash = EVP_MD_CTX_create();
2768 2769 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94));
2769 2770 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE);
2770 2771 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE);
2771 2772 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len);
2772 2773 EVP_MD_CTX_destroy(ukm_hash);
2773 2774 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV,
2774 2775 8,shared_ukm)<0) {
2775 2776 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2776 2777 SSL_R_LIBRARY_BUG);
2777 2778 goto err;
2778 2779 }
2779 2780 /* Make GOST keytransport blob message */
2780 2781 /*Encapsulate it into sequence */
2781 2782 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED;
2782 2783 msglen=255;
2783 2784 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) {
2784 2785 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2785 2786 SSL_R_LIBRARY_BUG);
2786 2787 goto err;
2787 2788 }
2788 2789 if (msglen >= 0x80)
2789 2790 {
2790 2791 *(p++)=0x81;
2791 2792 *(p++)= msglen & 0xff;
2792 2793 n=msglen+3;
2793 2794 }
2794 2795 else
2795 2796 {
2796 2797 *(p++)= msglen & 0xff;
2797 2798 n=msglen+2;
2798 2799 }
2799 2800 memcpy(p, tmp, msglen);
2800 2801 /* Check if pubkey from client certificate was used */
2801 2802 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0)
2802 2803 {
2803 2804 /* Set flag "skip certificate verify" */
2804 2805 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY;
2805 2806 }
2806 2807 EVP_PKEY_CTX_free(pkey_ctx);
2807 2808 s->session->master_key_length=
2808 2809 s->method->ssl3_enc->generate_master_secret(s,
2809 2810 s->session->master_key,premaster_secret,32);
2810 2811 EVP_PKEY_free(pub_key);
2811 2812
2812 2813 }
2813 2814 #ifndef OPENSSL_NO_SRP
2814 2815 else if (alg_k & SSL_kSRP)
2815 2816 {
2816 2817 if (s->srp_ctx.A != NULL)
2817 2818 {
2818 2819 /* send off the data */
2819 2820 n=BN_num_bytes(s->srp_ctx.A);
2820 2821 s2n(n,p);
2821 2822 BN_bn2bin(s->srp_ctx.A,p);
2822 2823 n+=2;
2823 2824 }
2824 2825 else
2825 2826 {
2826 2827 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2827 2828 goto err;
2828 2829 }
2829 2830 if (s->session->srp_username != NULL)
2830 2831 OPENSSL_free(s->session->srp_username);
2831 2832 s->session->srp_username = BUF_strdup(s->srp_ctx.login);
2832 2833 if (s->session->srp_username == NULL)
2833 2834 {
2834 2835 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2835 2836 ERR_R_MALLOC_FAILURE);
2836 2837 goto err;
2837 2838 }
2838 2839
2839 2840 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0)
2840 2841 {
2841 2842 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR);
2842 2843 goto err;
2843 2844 }
2844 2845 }
2845 2846 #endif
2846 2847 #ifndef OPENSSL_NO_PSK
2847 2848 else if (alg_k & SSL_kPSK)
2848 2849 {
2849 2850 char identity[PSK_MAX_IDENTITY_LEN];
2850 2851 unsigned char *t = NULL;
2851 2852 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4];
2852 2853 unsigned int pre_ms_len = 0, psk_len = 0;
2853 2854 int psk_err = 1;
2854 2855
2855 2856 n = 0;
2856 2857 if (s->psk_client_callback == NULL)
2857 2858 {
2858 2859 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2859 2860 SSL_R_PSK_NO_CLIENT_CB);
2860 2861 goto err;
2861 2862 }
2862 2863
2863 2864 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint,
2864 2865 identity, PSK_MAX_IDENTITY_LEN,
2865 2866 psk_or_pre_ms, sizeof(psk_or_pre_ms));
2866 2867 if (psk_len > PSK_MAX_PSK_LEN)
2867 2868 {
2868 2869 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2869 2870 ERR_R_INTERNAL_ERROR);
2870 2871 goto psk_err;
2871 2872 }
2872 2873 else if (psk_len == 0)
2873 2874 {
2874 2875 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2875 2876 SSL_R_PSK_IDENTITY_NOT_FOUND);
2876 2877 goto psk_err;
2877 2878 }
2878 2879
2879 2880 /* create PSK pre_master_secret */
2880 2881 pre_ms_len = 2+psk_len+2+psk_len;
2881 2882 t = psk_or_pre_ms;
2882 2883 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len);
2883 2884 s2n(psk_len, t);
2884 2885 memset(t, 0, psk_len);
2885 2886 t+=psk_len;
2886 2887 s2n(psk_len, t);
2887 2888
2888 2889 if (s->session->psk_identity_hint != NULL)
2889 2890 OPENSSL_free(s->session->psk_identity_hint);
2890 2891 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint);
2891 2892 if (s->ctx->psk_identity_hint != NULL &&
2892 2893 s->session->psk_identity_hint == NULL)
2893 2894 {
2894 2895 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2895 2896 ERR_R_MALLOC_FAILURE);
2896 2897 goto psk_err;
2897 2898 }
2898 2899
2899 2900 if (s->session->psk_identity != NULL)
2900 2901 OPENSSL_free(s->session->psk_identity);
2901 2902 s->session->psk_identity = BUF_strdup(identity);
2902 2903 if (s->session->psk_identity == NULL)
2903 2904 {
2904 2905 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2905 2906 ERR_R_MALLOC_FAILURE);
2906 2907 goto psk_err;
2907 2908 }
2908 2909
2909 2910 s->session->master_key_length =
2910 2911 s->method->ssl3_enc->generate_master_secret(s,
2911 2912 s->session->master_key,
2912 2913 psk_or_pre_ms, pre_ms_len);
2913 2914 n = strlen(identity);
2914 2915 s2n(n, p);
2915 2916 memcpy(p, identity, n);
2916 2917 n+=2;
2917 2918 psk_err = 0;
2918 2919 psk_err:
2919 2920 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN);
2920 2921 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms));
2921 2922 if (psk_err != 0)
2922 2923 {
2923 2924 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE);
2924 2925 goto err;
2925 2926 }
2926 2927 }
2927 2928 #endif
2928 2929 else
2929 2930 {
2930 2931 ssl3_send_alert(s, SSL3_AL_FATAL,
2931 2932 SSL_AD_HANDSHAKE_FAILURE);
2932 2933 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,
2933 2934 ERR_R_INTERNAL_ERROR);
2934 2935 goto err;
2935 2936 }
2936 2937
2937 2938 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE;
2938 2939 l2n3(n,d);
2939 2940
2940 2941 s->state=SSL3_ST_CW_KEY_EXCH_B;
2941 2942 /* number of bytes to write */
2942 2943 s->init_num=n+4;
2943 2944 s->init_off=0;
2944 2945 }
2945 2946
2946 2947 /* SSL3_ST_CW_KEY_EXCH_B */
2947 2948 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
2948 2949 err:
2949 2950 #ifndef OPENSSL_NO_ECDH
2950 2951 BN_CTX_free(bn_ctx);
2951 2952 if (encodedPoint != NULL) OPENSSL_free(encodedPoint);
2952 2953 if (clnt_ecdh != NULL)
2953 2954 EC_KEY_free(clnt_ecdh);
2954 2955 EVP_PKEY_free(srvr_pub_pkey);
2955 2956 #endif
2956 2957 return(-1);
2957 2958 }
2958 2959
2959 2960 int ssl3_send_client_verify(SSL *s)
2960 2961 {
2961 2962 unsigned char *p,*d;
2962 2963 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH];
2963 2964 EVP_PKEY *pkey;
2964 2965 EVP_PKEY_CTX *pctx=NULL;
2965 2966 EVP_MD_CTX mctx;
2966 2967 unsigned u=0;
2967 2968 unsigned long n;
2968 2969 int j;
2969 2970
2970 2971 EVP_MD_CTX_init(&mctx);
2971 2972
2972 2973 if (s->state == SSL3_ST_CW_CERT_VRFY_A)
2973 2974 {
2974 2975 d=(unsigned char *)s->init_buf->data;
2975 2976 p= &(d[4]);
2976 2977 pkey=s->cert->key->privatekey;
2977 2978 /* Create context from key and test if sha1 is allowed as digest */
2978 2979 pctx = EVP_PKEY_CTX_new(pkey,NULL);
2979 2980 EVP_PKEY_sign_init(pctx);
2980 2981 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0)
2981 2982 {
2982 2983 if (TLS1_get_version(s) < TLS1_2_VERSION)
2983 2984 s->method->ssl3_enc->cert_verify_mac(s,
2984 2985 NID_sha1,
2985 2986 &(data[MD5_DIGEST_LENGTH]));
2986 2987 }
2987 2988 else
2988 2989 {
2989 2990 ERR_clear_error();
2990 2991 }
2991 2992 /* For TLS v1.2 send signature algorithm and signature
2992 2993 * using agreed digest and cached handshake records.
2993 2994 */
2994 2995 if (TLS1_get_version(s) >= TLS1_2_VERSION)
2995 2996 {
2996 2997 long hdatalen = 0;
2997 2998 void *hdata;
2998 2999 const EVP_MD *md = s->cert->key->digest;
2999 3000 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer,
3000 3001 &hdata);
3001 3002 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md))
3002 3003 {
3003 3004 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3004 3005 ERR_R_INTERNAL_ERROR);
3005 3006 goto err;
3006 3007 }
3007 3008 p += 2;
3008 3009 #ifdef SSL_DEBUG
3009 3010 fprintf(stderr, "Using TLS 1.2 with client alg %s\n",
3010 3011 EVP_MD_name(md));
3011 3012 #endif
3012 3013 if (!EVP_SignInit_ex(&mctx, md, NULL)
3013 3014 || !EVP_SignUpdate(&mctx, hdata, hdatalen)
3014 3015 || !EVP_SignFinal(&mctx, p + 2, &u, pkey))
3015 3016 {
3016 3017 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3017 3018 ERR_R_EVP_LIB);
3018 3019 goto err;
3019 3020 }
3020 3021 s2n(u,p);
3021 3022 n = u + 4;
3022 3023 if (!ssl3_digest_cached_records(s))
3023 3024 goto err;
3024 3025 }
3025 3026 else
3026 3027 #ifndef OPENSSL_NO_RSA
3027 3028 if (pkey->type == EVP_PKEY_RSA)
3028 3029 {
3029 3030 s->method->ssl3_enc->cert_verify_mac(s,
3030 3031 NID_md5,
3031 3032 &(data[0]));
3032 3033 if (RSA_sign(NID_md5_sha1, data,
3033 3034 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH,
3034 3035 &(p[2]), &u, pkey->pkey.rsa) <= 0 )
3035 3036 {
3036 3037 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB);
3037 3038 goto err;
3038 3039 }
3039 3040 s2n(u,p);
3040 3041 n=u+2;
3041 3042 }
3042 3043 else
3043 3044 #endif
3044 3045 #ifndef OPENSSL_NO_DSA
3045 3046 if (pkey->type == EVP_PKEY_DSA)
3046 3047 {
3047 3048 if (!DSA_sign(pkey->save_type,
3048 3049 &(data[MD5_DIGEST_LENGTH]),
3049 3050 SHA_DIGEST_LENGTH,&(p[2]),
3050 3051 (unsigned int *)&j,pkey->pkey.dsa))
3051 3052 {
3052 3053 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB);
3053 3054 goto err;
3054 3055 }
3055 3056 s2n(j,p);
3056 3057 n=j+2;
3057 3058 }
3058 3059 else
3059 3060 #endif
3060 3061 #ifndef OPENSSL_NO_ECDSA
3061 3062 if (pkey->type == EVP_PKEY_EC)
3062 3063 {
3063 3064 if (!ECDSA_sign(pkey->save_type,
3064 3065 &(data[MD5_DIGEST_LENGTH]),
3065 3066 SHA_DIGEST_LENGTH,&(p[2]),
3066 3067 (unsigned int *)&j,pkey->pkey.ec))
3067 3068 {
3068 3069 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3069 3070 ERR_R_ECDSA_LIB);
3070 3071 goto err;
3071 3072 }
3072 3073 s2n(j,p);
3073 3074 n=j+2;
3074 3075 }
3075 3076 else
3076 3077 #endif
3077 3078 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001)
3078 3079 {
3079 3080 unsigned char signbuf[64];
3080 3081 int i;
3081 3082 size_t sigsize=64;
3082 3083 s->method->ssl3_enc->cert_verify_mac(s,
3083 3084 NID_id_GostR3411_94,
3084 3085 data);
3085 3086 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) {
3086 3087 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,
3087 3088 ERR_R_INTERNAL_ERROR);
3088 3089 goto err;
3089 3090 }
3090 3091 for (i=63,j=0; i>=0; j++, i--) {
3091 3092 p[2+j]=signbuf[i];
3092 3093 }
3093 3094 s2n(j,p);
3094 3095 n=j+2;
3095 3096 }
3096 3097 else
3097 3098 {
3098 3099 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR);
3099 3100 goto err;
3100 3101 }
3101 3102 *(d++)=SSL3_MT_CERTIFICATE_VERIFY;
3102 3103 l2n3(n,d);
3103 3104
3104 3105 s->state=SSL3_ST_CW_CERT_VRFY_B;
3105 3106 s->init_num=(int)n+4;
3106 3107 s->init_off=0;
3107 3108 }
3108 3109 EVP_MD_CTX_cleanup(&mctx);
3109 3110 EVP_PKEY_CTX_free(pctx);
3110 3111 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3111 3112 err:
3112 3113 EVP_MD_CTX_cleanup(&mctx);
3113 3114 EVP_PKEY_CTX_free(pctx);
3114 3115 return(-1);
3115 3116 }
3116 3117
3117 3118 int ssl3_send_client_certificate(SSL *s)
3118 3119 {
3119 3120 X509 *x509=NULL;
3120 3121 EVP_PKEY *pkey=NULL;
3121 3122 int i;
3122 3123 unsigned long l;
3123 3124
3124 3125 if (s->state == SSL3_ST_CW_CERT_A)
3125 3126 {
3126 3127 if ((s->cert == NULL) ||
3127 3128 (s->cert->key->x509 == NULL) ||
3128 3129 (s->cert->key->privatekey == NULL))
3129 3130 s->state=SSL3_ST_CW_CERT_B;
3130 3131 else
3131 3132 s->state=SSL3_ST_CW_CERT_C;
3132 3133 }
3133 3134
3134 3135 /* We need to get a client cert */
3135 3136 if (s->state == SSL3_ST_CW_CERT_B)
3136 3137 {
3137 3138 /* If we get an error, we need to
3138 3139 * ssl->rwstate=SSL_X509_LOOKUP; return(-1);
3139 3140 * We then get retied later */
3140 3141 i=0;
3141 3142 i = ssl_do_client_cert_cb(s, &x509, &pkey);
3142 3143 if (i < 0)
3143 3144 {
3144 3145 s->rwstate=SSL_X509_LOOKUP;
3145 3146 return(-1);
3146 3147 }
3147 3148 s->rwstate=SSL_NOTHING;
3148 3149 if ((i == 1) && (pkey != NULL) && (x509 != NULL))
3149 3150 {
3150 3151 s->state=SSL3_ST_CW_CERT_B;
3151 3152 if ( !SSL_use_certificate(s,x509) ||
3152 3153 !SSL_use_PrivateKey(s,pkey))
3153 3154 i=0;
3154 3155 }
3155 3156 else if (i == 1)
3156 3157 {
3157 3158 i=0;
3158 3159 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK);
3159 3160 }
3160 3161
3161 3162 if (x509 != NULL) X509_free(x509);
3162 3163 if (pkey != NULL) EVP_PKEY_free(pkey);
3163 3164 if (i == 0)
3164 3165 {
3165 3166 if (s->version == SSL3_VERSION)
3166 3167 {
3167 3168 s->s3->tmp.cert_req=0;
3168 3169 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE);
3169 3170 return(1);
3170 3171 }
3171 3172 else
3172 3173 {
3173 3174 s->s3->tmp.cert_req=2;
3174 3175 }
3175 3176 }
3176 3177
3177 3178 /* Ok, we have a cert */
3178 3179 s->state=SSL3_ST_CW_CERT_C;
3179 3180 }
3180 3181
3181 3182 if (s->state == SSL3_ST_CW_CERT_C)
3182 3183 {
3183 3184 s->state=SSL3_ST_CW_CERT_D;
3184 3185 l=ssl3_output_cert_chain(s,
3185 3186 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509);
3186 3187 s->init_num=(int)l;
3187 3188 s->init_off=0;
3188 3189 }
3189 3190 /* SSL3_ST_CW_CERT_D */
3190 3191 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
3191 3192 }
3192 3193
3193 3194 #define has_bits(i,m) (((i)&(m)) == (m))
3194 3195
3195 3196 int ssl3_check_cert_and_algorithm(SSL *s)
3196 3197 {
3197 3198 int i,idx;
3198 3199 long alg_k,alg_a;
3199 3200 EVP_PKEY *pkey=NULL;
3200 3201 SESS_CERT *sc;
3201 3202 #ifndef OPENSSL_NO_RSA
3202 3203 RSA *rsa;
3203 3204 #endif
3204 3205 #ifndef OPENSSL_NO_DH
3205 3206 DH *dh;
3206 3207 #endif
3207 3208
3208 3209 alg_k=s->s3->tmp.new_cipher->algorithm_mkey;
3209 3210 alg_a=s->s3->tmp.new_cipher->algorithm_auth;
3210 3211
3211 3212 /* we don't have a certificate */
3212 3213 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK))
3213 3214 return(1);
3214 3215
3215 3216 sc=s->session->sess_cert;
3216 3217 if (sc == NULL)
3217 3218 {
3218 3219 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR);
3219 3220 goto err;
3220 3221 }
3221 3222
3222 3223 #ifndef OPENSSL_NO_RSA
3223 3224 rsa=s->session->sess_cert->peer_rsa_tmp;
3224 3225 #endif
3225 3226 #ifndef OPENSSL_NO_DH
3226 3227 dh=s->session->sess_cert->peer_dh_tmp;
3227 3228 #endif
3228 3229
3229 3230 /* This is the passed certificate */
3230 3231
3231 3232 idx=sc->peer_cert_type;
3232 3233 #ifndef OPENSSL_NO_ECDH
3233 3234 if (idx == SSL_PKEY_ECC)
3234 3235 {
3235 3236 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509,
3236 3237 s) == 0)
3237 3238 { /* check failed */
3238 3239 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT);
3239 3240 goto f_err;
3240 3241 }
3241 3242 else
3242 3243 {
3243 3244 return 1;
3244 3245 }
3245 3246 }
3246 3247 #endif
3247 3248 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509);
3248 3249 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey);
3249 3250 EVP_PKEY_free(pkey);
3250 3251
3251 3252
3252 3253 /* Check that we have a certificate if we require one */
3253 3254 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN))
3254 3255 {
3255 3256 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT);
3256 3257 goto f_err;
3257 3258 }
3258 3259 #ifndef OPENSSL_NO_DSA
3259 3260 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN))
3260 3261 {
3261 3262 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT);
3262 3263 goto f_err;
3263 3264 }
3264 3265 #endif
3265 3266 #ifndef OPENSSL_NO_RSA
3266 3267 if ((alg_k & SSL_kRSA) &&
3267 3268 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL)))
3268 3269 {
3269 3270 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT);
3270 3271 goto f_err;
3271 3272 }
3272 3273 #endif
3273 3274 #ifndef OPENSSL_NO_DH
3274 3275 if ((alg_k & SSL_kEDH) &&
3275 3276 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL)))
3276 3277 {
3277 3278 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY);
3278 3279 goto f_err;
3279 3280 }
3280 3281 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA))
3281 3282 {
3282 3283 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT);
3283 3284 goto f_err;
3284 3285 }
3285 3286 #ifndef OPENSSL_NO_DSA
3286 3287 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA))
3287 3288 {
3288 3289 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT);
3289 3290 goto f_err;
3290 3291 }
3291 3292 #endif
3292 3293 #endif
3293 3294
3294 3295 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP))
3295 3296 {
3296 3297 #ifndef OPENSSL_NO_RSA
3297 3298 if (alg_k & SSL_kRSA)
3298 3299 {
3299 3300 if (rsa == NULL
3300 3301 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3301 3302 {
3302 3303 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY);
3303 3304 goto f_err;
3304 3305 }
3305 3306 }
3306 3307 else
3307 3308 #endif
3308 3309 #ifndef OPENSSL_NO_DH
3309 3310 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd))
3310 3311 {
3311 3312 if (dh == NULL
3312 3313 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher))
3313 3314 {
3314 3315 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY);
3315 3316 goto f_err;
3316 3317 }
3317 3318 }
3318 3319 else
3319 3320 #endif
3320 3321 {
3321 3322 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE);
3322 3323 goto f_err;
3323 3324 }
3324 3325 }
3325 3326 return(1);
3326 3327 f_err:
3327 3328 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
3328 3329 err:
3329 3330 return(0);
3330 3331 }
3331 3332
3332 3333 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG)
3333 3334 int ssl3_send_next_proto(SSL *s)
3334 3335 {
3335 3336 unsigned int len, padding_len;
3336 3337 unsigned char *d;
3337 3338
3338 3339 if (s->state == SSL3_ST_CW_NEXT_PROTO_A)
3339 3340 {
3340 3341 len = s->next_proto_negotiated_len;
3341 3342 padding_len = 32 - ((len + 2) % 32);
3342 3343 d = (unsigned char *)s->init_buf->data;
3343 3344 d[4] = len;
3344 3345 memcpy(d + 5, s->next_proto_negotiated, len);
3345 3346 d[5 + len] = padding_len;
3346 3347 memset(d + 6 + len, 0, padding_len);
3347 3348 *(d++)=SSL3_MT_NEXT_PROTO;
3348 3349 l2n3(2 + len + padding_len, d);
3349 3350 s->state = SSL3_ST_CW_NEXT_PROTO_B;
3350 3351 s->init_num = 4 + 2 + len + padding_len;
3351 3352 s->init_off = 0;
3352 3353 }
3353 3354
3354 3355 return ssl3_do_write(s, SSL3_RT_HANDSHAKE);
3355 3356 }
3356 3357 #endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */
3357 3358
3358 3359 /* Check to see if handshake is full or resumed. Usually this is just a
3359 3360 * case of checking to see if a cache hit has occurred. In the case of
3360 3361 * session tickets we have to check the next message to be sure.
3361 3362 */
3362 3363
3363 3364 #ifndef OPENSSL_NO_TLSEXT
3364 3365 int ssl3_check_finished(SSL *s)
3365 3366 {
3366 3367 int ok;
3367 3368 long n;
3368 3369 /* If we have no ticket it cannot be a resumed session. */
3369 3370 if (!s->session->tlsext_tick)
3370 3371 return 1;
3371 3372 /* this function is called when we really expect a Certificate
3372 3373 * message, so permit appropriate message length */
3373 3374 n=s->method->ssl_get_message(s,
3374 3375 SSL3_ST_CR_CERT_A,
3375 3376 SSL3_ST_CR_CERT_B,
3376 3377 -1,
3377 3378 s->max_cert_list,
3378 3379 &ok);
3379 3380 if (!ok) return((int)n);
3380 3381 s->s3->tmp.reuse_message = 1;
3381 3382 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED)
3382 3383 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET))
3383 3384 return 2;
3384 3385
3385 3386 return 1;
3386 3387 }
3387 3388 #endif
3388 3389
3389 3390 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey)
3390 3391 {
3391 3392 int i = 0;
3392 3393 #ifndef OPENSSL_NO_ENGINE
3393 3394 if (s->ctx->client_cert_engine)
3394 3395 {
3395 3396 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s,
3396 3397 SSL_get_client_CA_list(s),
3397 3398 px509, ppkey, NULL, NULL, NULL);
3398 3399 if (i != 0)
3399 3400 return i;
3400 3401 }
3401 3402 #endif
3402 3403 if (s->ctx->client_cert_cb)
3403 3404 i = s->ctx->client_cert_cb(s,px509,ppkey);
3404 3405 return i;
3405 3406 }
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