s3_clnt.c revision 273399
194742Sobrien/* ssl/s3_clnt.c */ 294742Sobrien/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3146890Speter * All rights reserved. 4146890Speter * 5146890Speter * This package is an SSL implementation written 6146890Speter * by Eric Young (eay@cryptsoft.com). 7146890Speter * The implementation was written so as to conform with Netscapes SSL. 8146890Speter * 9146890Speter * This library is free for commercial and non-commercial use as long as 10146890Speter * the following conditions are aheared to. The following conditions 11146890Speter * apply to all code found in this distribution, be it the RC4, RSA, 12146890Speter * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13146890Speter * included with this distribution is covered by the same copyright terms 14146890Speter * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15146890Speter * 16146890Speter * Copyright remains Eric Young's, and as such any Copyright notices in 17146890Speter * the code are not to be removed. 18146890Speter * If this package is used in a product, Eric Young should be given attribution 19146890Speter * as the author of the parts of the library used. 20146890Speter * This can be in the form of a textual message at program startup or 2194742Sobrien * in documentation (online or textual) provided with the package. 2295253Sru * 2394742Sobrien * Redistribution and use in source and binary forms, with or without 2496991Srwatson * modification, are permitted provided that the following conditions 2596991Srwatson * are met: 2696991Srwatson * 1. Redistributions of source code must retain the copyright 27102773Srwatson * notice, this list of conditions and the following disclaimer. 28102773Srwatson * 2. Redistributions in binary form must reproduce the above copyright 2994854Ssos * notice, this list of conditions and the following disclaimer in the 3094917Simp * documentation and/or other materials provided with the distribution. 31126445Sobrien * 3. All advertising materials mentioning features or use of this software 3294917Simp * must display the following acknowledgement: 3394917Simp * "This product includes cryptographic software written by 34146933Simp * Eric Young (eay@cryptsoft.com)" 35146918Smarkm * The word 'cryptographic' can be left out if the rouines from the library 36146918Smarkm * being used are not cryptographic related :-). 37125244Snectar * 4. If you include any Windows specific code (or a derivative thereof) from 38125244Snectar * the apps directory (application code) you must include an acknowledgement: 3994847Sjhb * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 4094847Sjhb * 4194847Sjhb * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42126337Svkashyap * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43128023Svkashyap * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4494855Sscottl * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45126054Sscottl * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46126054Sscottl * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47126054Sscottl * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48126054Sscottl * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49126054Sscottl * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50126054Sscottl * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5194915Sken * SUCH DAMAGE. 5299607Smjacob * 5394915Sken * The licence and distribution terms for any publically available version or 5494915Sken * derivative of this code cannot be changed. i.e. this code cannot simply be 5594915Sken * copied and put under another distribution licence 5694915Sken * [including the GNU Public Licence.] 5794915Sken */ 5894915Sken/* ==================================================================== 5994915Sken * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. 6094915Sken * 6199607Smjacob * Redistribution and use in source and binary forms, with or without 62106734Smjacob * modification, are permitted provided that the following conditions 63128435Stackerman * are met: 6497611Sbillf * 6594918Sgshapiro * 1. Redistributions of source code must retain the above copyright 6694918Sgshapiro * notice, this list of conditions and the following disclaimer. 6794918Sgshapiro * 6894918Sgshapiro * 2. Redistributions in binary form must reproduce the above copyright 6994918Sgshapiro * notice, this list of conditions and the following disclaimer in 70118316Smbr * the documentation and/or other materials provided with the 7194955Smurray * distribution. 72106187Sdes * 73106187Sdes * 3. All advertising materials mentioning features or use of this 7495455Sdes * software must display the following acknowledgment: 7598750Sdes * "This product includes software developed by the OpenSSL Project 7699606Sdes * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 7799606Sdes * 7899606Sdes * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 7996268Sgad * endorse or promote products derived from this software without 8096268Sgad * prior written permission. For written permission, please contact 81116233Sgad * openssl-core@openssl.org. 82139390Sgad * 83139390Sgad * 5. Products derived from this software may not be called "OpenSSL" 84139390Sgad * nor may "OpenSSL" appear in their names without prior written 8596332Speter * permission of the OpenSSL Project. 8696332Speter * 8796332Speter * 6. Redistributions of any form whatsoever must retain the following 8896332Speter * acknowledgment: 8996332Speter * "This product includes software developed by the OpenSSL Project 90100314Sru * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91146921Sru * 92146921Sru * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 9397611Sbillf * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 9498333Sanholt * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95111061Sjmallett * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 9699732Sjoerg * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 9799732Sjoerg * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98113692Snectar * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99113692Snectar * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100115825Sfanf * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101126445Sobrien * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102117645Sdwmalone * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103118204Sbp * OF THE POSSIBILITY OF SUCH DAMAGE. 104118204Sbp * ==================================================================== 105118204Sbp * 106118204Sbp * This product includes cryptographic software written by Eric Young 107127337Smlaier * (eay@cryptsoft.com). This product includes software written by Tim 108126445Sobrien * Hudson (tjh@cryptsoft.com). 109146837Sobrien * 110146837Sobrien */ 111146837Sobrien/* ==================================================================== 112146837Sobrien * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 113133182Spjd * 114133182Spjd * Portions of the attached software ("Contribution") are developed by 115133182Spjd * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. 116133182Spjd * 117133182Spjd * The Contribution is licensed pursuant to the OpenSSL open source 118133841Spjd * license provided above. 119143521Spjd * 120133182Spjd * ECC cipher suite support in OpenSSL originally written by 121133182Spjd * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. 122132311Salfred * 123132311Salfred */ 124132311Salfred/* ==================================================================== 125132268Salfred * Copyright 2005 Nokia. All rights reserved. 126146558Skrion * 127146960Simp * The portions of the attached software ("Contribution") is developed by 128148772Scperciva * Nokia Corporation and is licensed pursuant to the OpenSSL open source 129115822Sdougb * license. 130115822Sdougb * 131115822Sdougb * The Contribution, originally written by Mika Kousa and Pasi Eronen of 132115822Sdougb * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites 133115822Sdougb * support (see RFC 4279) to OpenSSL. 134115822Sdougb * 135115822Sdougb * No patent licenses or other rights except those expressly stated in 136146629Sschweikh * the OpenSSL open source license shall be deemed granted or received 137146629Sschweikh * expressly, by implication, estoppel, or otherwise. 138146629Sschweikh * 139115822Sdougb * No assurances are provided by Nokia that the Contribution does not 140146586Sschweikh * infringe the patent or other intellectual property rights of any third 141146586Sschweikh * party or that the license provides you with all the necessary rights 142146629Sschweikh * to make use of the Contribution. 143115822Sdougb * 144146629Sschweikh * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN 145146629Sschweikh * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA 146115822Sdougb * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY 147115822Sdougb * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR 148115822Sdougb * OTHERWISE. 149115822Sdougb */ 150115822Sdougb 151146586Sschweikh#include <stdio.h> 152146586Sschweikh#include "ssl_locl.h" 153115822Sdougb#include "kssl_lcl.h" 154#include <openssl/buffer.h> 155#include <openssl/rand.h> 156#include <openssl/objects.h> 157#include <openssl/evp.h> 158#include <openssl/md5.h> 159#ifdef OPENSSL_FIPS 160#include <openssl/fips.h> 161#endif 162#ifndef OPENSSL_NO_DH 163#include <openssl/dh.h> 164#endif 165#include <openssl/bn.h> 166#ifndef OPENSSL_NO_ENGINE 167#include <openssl/engine.h> 168#endif 169 170static const SSL_METHOD *ssl3_get_client_method(int ver); 171static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b); 172 173static const SSL_METHOD *ssl3_get_client_method(int ver) 174 { 175 if (ver == SSL3_VERSION) 176 return(SSLv3_client_method()); 177 else 178 return(NULL); 179 } 180 181IMPLEMENT_ssl3_meth_func(SSLv3_client_method, 182 ssl_undefined_function, 183 ssl3_connect, 184 ssl3_get_client_method) 185 186int ssl3_connect(SSL *s) 187 { 188 BUF_MEM *buf=NULL; 189 unsigned long Time=(unsigned long)time(NULL); 190 void (*cb)(const SSL *ssl,int type,int val)=NULL; 191 int ret= -1; 192 int new_state,state,skip=0; 193 194 RAND_add(&Time,sizeof(Time),0); 195 ERR_clear_error(); 196 clear_sys_error(); 197 198 if (s->info_callback != NULL) 199 cb=s->info_callback; 200 else if (s->ctx->info_callback != NULL) 201 cb=s->ctx->info_callback; 202 203 s->in_handshake++; 204 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 205 206#ifndef OPENSSL_NO_HEARTBEATS 207 /* If we're awaiting a HeartbeatResponse, pretend we 208 * already got and don't await it anymore, because 209 * Heartbeats don't make sense during handshakes anyway. 210 */ 211 if (s->tlsext_hb_pending) 212 { 213 s->tlsext_hb_pending = 0; 214 s->tlsext_hb_seq++; 215 } 216#endif 217 218 for (;;) 219 { 220 state=s->state; 221 222 switch(s->state) 223 { 224 case SSL_ST_RENEGOTIATE: 225 s->renegotiate=1; 226 s->state=SSL_ST_CONNECT; 227 s->ctx->stats.sess_connect_renegotiate++; 228 /* break */ 229 case SSL_ST_BEFORE: 230 case SSL_ST_CONNECT: 231 case SSL_ST_BEFORE|SSL_ST_CONNECT: 232 case SSL_ST_OK|SSL_ST_CONNECT: 233 234 s->server=0; 235 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); 236 237 if ((s->version & 0xff00 ) != 0x0300) 238 { 239 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR); 240 ret = -1; 241 goto end; 242 } 243 244 /* s->version=SSL3_VERSION; */ 245 s->type=SSL_ST_CONNECT; 246 247 if (s->init_buf == NULL) 248 { 249 if ((buf=BUF_MEM_new()) == NULL) 250 { 251 ret= -1; 252 goto end; 253 } 254 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) 255 { 256 ret= -1; 257 goto end; 258 } 259 s->init_buf=buf; 260 buf=NULL; 261 } 262 263 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } 264 265 /* setup buffing BIO */ 266 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; } 267 268 /* don't push the buffering BIO quite yet */ 269 270 ssl3_init_finished_mac(s); 271 272 s->state=SSL3_ST_CW_CLNT_HELLO_A; 273 s->ctx->stats.sess_connect++; 274 s->init_num=0; 275 break; 276 277 case SSL3_ST_CW_CLNT_HELLO_A: 278 case SSL3_ST_CW_CLNT_HELLO_B: 279 280 s->shutdown=0; 281 ret=ssl3_client_hello(s); 282 if (ret <= 0) goto end; 283 s->state=SSL3_ST_CR_SRVR_HELLO_A; 284 s->init_num=0; 285 286 /* turn on buffering for the next lot of output */ 287 if (s->bbio != s->wbio) 288 s->wbio=BIO_push(s->bbio,s->wbio); 289 290 break; 291 292 case SSL3_ST_CR_SRVR_HELLO_A: 293 case SSL3_ST_CR_SRVR_HELLO_B: 294 ret=ssl3_get_server_hello(s); 295 if (ret <= 0) goto end; 296 297 if (s->hit) 298 { 299 s->state=SSL3_ST_CR_FINISHED_A; 300#ifndef OPENSSL_NO_TLSEXT 301 if (s->tlsext_ticket_expected) 302 { 303 /* receive renewed session ticket */ 304 s->state=SSL3_ST_CR_SESSION_TICKET_A; 305 } 306#endif 307 } 308 else 309 s->state=SSL3_ST_CR_CERT_A; 310 s->init_num=0; 311 break; 312 313 case SSL3_ST_CR_CERT_A: 314 case SSL3_ST_CR_CERT_B: 315#ifndef OPENSSL_NO_TLSEXT 316 ret=ssl3_check_finished(s); 317 if (ret <= 0) goto end; 318 if (ret == 2) 319 { 320 s->hit = 1; 321 if (s->tlsext_ticket_expected) 322 s->state=SSL3_ST_CR_SESSION_TICKET_A; 323 else 324 s->state=SSL3_ST_CR_FINISHED_A; 325 s->init_num=0; 326 break; 327 } 328#endif 329 /* Check if it is anon DH/ECDH, SRP auth */ 330 /* or PSK */ 331 if (!(s->s3->tmp.new_cipher->algorithm_auth & (SSL_aNULL|SSL_aSRP)) && 332 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK)) 333 { 334 ret=ssl3_get_server_certificate(s); 335 if (ret <= 0) goto end; 336#ifndef OPENSSL_NO_TLSEXT 337 if (s->tlsext_status_expected) 338 s->state=SSL3_ST_CR_CERT_STATUS_A; 339 else 340 s->state=SSL3_ST_CR_KEY_EXCH_A; 341 } 342 else 343 { 344 skip = 1; 345 s->state=SSL3_ST_CR_KEY_EXCH_A; 346 } 347#else 348 } 349 else 350 skip=1; 351 352 s->state=SSL3_ST_CR_KEY_EXCH_A; 353#endif 354 s->init_num=0; 355 break; 356 357 case SSL3_ST_CR_KEY_EXCH_A: 358 case SSL3_ST_CR_KEY_EXCH_B: 359 ret=ssl3_get_key_exchange(s); 360 if (ret <= 0) goto end; 361 s->state=SSL3_ST_CR_CERT_REQ_A; 362 s->init_num=0; 363 364 /* at this point we check that we have the 365 * required stuff from the server */ 366 if (!ssl3_check_cert_and_algorithm(s)) 367 { 368 ret= -1; 369 goto end; 370 } 371 break; 372 373 case SSL3_ST_CR_CERT_REQ_A: 374 case SSL3_ST_CR_CERT_REQ_B: 375 ret=ssl3_get_certificate_request(s); 376 if (ret <= 0) goto end; 377 s->state=SSL3_ST_CR_SRVR_DONE_A; 378 s->init_num=0; 379 break; 380 381 case SSL3_ST_CR_SRVR_DONE_A: 382 case SSL3_ST_CR_SRVR_DONE_B: 383 ret=ssl3_get_server_done(s); 384 if (ret <= 0) goto end; 385#ifndef OPENSSL_NO_SRP 386 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) 387 { 388 if ((ret = SRP_Calc_A_param(s))<=0) 389 { 390 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC); 391 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR); 392 goto end; 393 } 394 } 395#endif 396 if (s->s3->tmp.cert_req) 397 s->state=SSL3_ST_CW_CERT_A; 398 else 399 s->state=SSL3_ST_CW_KEY_EXCH_A; 400 s->init_num=0; 401 402 break; 403 404 case SSL3_ST_CW_CERT_A: 405 case SSL3_ST_CW_CERT_B: 406 case SSL3_ST_CW_CERT_C: 407 case SSL3_ST_CW_CERT_D: 408 ret=ssl3_send_client_certificate(s); 409 if (ret <= 0) goto end; 410 s->state=SSL3_ST_CW_KEY_EXCH_A; 411 s->init_num=0; 412 break; 413 414 case SSL3_ST_CW_KEY_EXCH_A: 415 case SSL3_ST_CW_KEY_EXCH_B: 416 ret=ssl3_send_client_key_exchange(s); 417 if (ret <= 0) goto end; 418 /* EAY EAY EAY need to check for DH fix cert 419 * sent back */ 420 /* For TLS, cert_req is set to 2, so a cert chain 421 * of nothing is sent, but no verify packet is sent */ 422 /* XXX: For now, we do not support client 423 * authentication in ECDH cipher suites with 424 * ECDH (rather than ECDSA) certificates. 425 * We need to skip the certificate verify 426 * message when client's ECDH public key is sent 427 * inside the client certificate. 428 */ 429 if (s->s3->tmp.cert_req == 1) 430 { 431 s->state=SSL3_ST_CW_CERT_VRFY_A; 432 } 433 else 434 { 435 s->state=SSL3_ST_CW_CHANGE_A; 436 s->s3->change_cipher_spec=0; 437 } 438 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) 439 { 440 s->state=SSL3_ST_CW_CHANGE_A; 441 s->s3->change_cipher_spec=0; 442 } 443 444 s->init_num=0; 445 break; 446 447 case SSL3_ST_CW_CERT_VRFY_A: 448 case SSL3_ST_CW_CERT_VRFY_B: 449 ret=ssl3_send_client_verify(s); 450 if (ret <= 0) goto end; 451 s->state=SSL3_ST_CW_CHANGE_A; 452 s->init_num=0; 453 s->s3->change_cipher_spec=0; 454 break; 455 456 case SSL3_ST_CW_CHANGE_A: 457 case SSL3_ST_CW_CHANGE_B: 458 ret=ssl3_send_change_cipher_spec(s, 459 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); 460 if (ret <= 0) goto end; 461 462#if defined(OPENSSL_NO_TLSEXT) || defined(OPENSSL_NO_NEXTPROTONEG) 463 s->state=SSL3_ST_CW_FINISHED_A; 464#else 465 if (s->s3->next_proto_neg_seen) 466 s->state=SSL3_ST_CW_NEXT_PROTO_A; 467 else 468 s->state=SSL3_ST_CW_FINISHED_A; 469#endif 470 s->init_num=0; 471 472 s->session->cipher=s->s3->tmp.new_cipher; 473#ifdef OPENSSL_NO_COMP 474 s->session->compress_meth=0; 475#else 476 if (s->s3->tmp.new_compression == NULL) 477 s->session->compress_meth=0; 478 else 479 s->session->compress_meth= 480 s->s3->tmp.new_compression->id; 481#endif 482 if (!s->method->ssl3_enc->setup_key_block(s)) 483 { 484 ret= -1; 485 goto end; 486 } 487 488 if (!s->method->ssl3_enc->change_cipher_state(s, 489 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 490 { 491 ret= -1; 492 goto end; 493 } 494 495 break; 496 497#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 498 case SSL3_ST_CW_NEXT_PROTO_A: 499 case SSL3_ST_CW_NEXT_PROTO_B: 500 ret=ssl3_send_next_proto(s); 501 if (ret <= 0) goto end; 502 s->state=SSL3_ST_CW_FINISHED_A; 503 break; 504#endif 505 506 case SSL3_ST_CW_FINISHED_A: 507 case SSL3_ST_CW_FINISHED_B: 508 ret=ssl3_send_finished(s, 509 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, 510 s->method->ssl3_enc->client_finished_label, 511 s->method->ssl3_enc->client_finished_label_len); 512 if (ret <= 0) goto end; 513 s->s3->flags |= SSL3_FLAGS_CCS_OK; 514 s->state=SSL3_ST_CW_FLUSH; 515 516 /* clear flags */ 517 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; 518 if (s->hit) 519 { 520 s->s3->tmp.next_state=SSL_ST_OK; 521 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 522 { 523 s->state=SSL_ST_OK; 524 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 525 s->s3->delay_buf_pop_ret=0; 526 } 527 } 528 else 529 { 530#ifndef OPENSSL_NO_TLSEXT 531 /* Allow NewSessionTicket if ticket expected */ 532 if (s->tlsext_ticket_expected) 533 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; 534 else 535#endif 536 537 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; 538 } 539 s->init_num=0; 540 break; 541 542#ifndef OPENSSL_NO_TLSEXT 543 case SSL3_ST_CR_SESSION_TICKET_A: 544 case SSL3_ST_CR_SESSION_TICKET_B: 545 ret=ssl3_get_new_session_ticket(s); 546 if (ret <= 0) goto end; 547 s->state=SSL3_ST_CR_FINISHED_A; 548 s->init_num=0; 549 break; 550 551 case SSL3_ST_CR_CERT_STATUS_A: 552 case SSL3_ST_CR_CERT_STATUS_B: 553 ret=ssl3_get_cert_status(s); 554 if (ret <= 0) goto end; 555 s->state=SSL3_ST_CR_KEY_EXCH_A; 556 s->init_num=0; 557 break; 558#endif 559 560 case SSL3_ST_CR_FINISHED_A: 561 case SSL3_ST_CR_FINISHED_B: 562 563 s->s3->flags |= SSL3_FLAGS_CCS_OK; 564 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, 565 SSL3_ST_CR_FINISHED_B); 566 if (ret <= 0) goto end; 567 568 if (s->hit) 569 s->state=SSL3_ST_CW_CHANGE_A; 570 else 571 s->state=SSL_ST_OK; 572 s->init_num=0; 573 break; 574 575 case SSL3_ST_CW_FLUSH: 576 s->rwstate=SSL_WRITING; 577 if (BIO_flush(s->wbio) <= 0) 578 { 579 ret= -1; 580 goto end; 581 } 582 s->rwstate=SSL_NOTHING; 583 s->state=s->s3->tmp.next_state; 584 break; 585 586 case SSL_ST_OK: 587 /* clean a few things up */ 588 ssl3_cleanup_key_block(s); 589 590 if (s->init_buf != NULL) 591 { 592 BUF_MEM_free(s->init_buf); 593 s->init_buf=NULL; 594 } 595 596 /* If we are not 'joining' the last two packets, 597 * remove the buffering now */ 598 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 599 ssl_free_wbio_buffer(s); 600 /* else do it later in ssl3_write */ 601 602 s->init_num=0; 603 s->renegotiate=0; 604 s->new_session=0; 605 606 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 607 if (s->hit) s->ctx->stats.sess_hit++; 608 609 ret=1; 610 /* s->server=0; */ 611 s->handshake_func=ssl3_connect; 612 s->ctx->stats.sess_connect_good++; 613 614 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 615 616 goto end; 617 /* break; */ 618 619 default: 620 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); 621 ret= -1; 622 goto end; 623 /* break; */ 624 } 625 626 /* did we do anything */ 627 if (!s->s3->tmp.reuse_message && !skip) 628 { 629 if (s->debug) 630 { 631 if ((ret=BIO_flush(s->wbio)) <= 0) 632 goto end; 633 } 634 635 if ((cb != NULL) && (s->state != state)) 636 { 637 new_state=s->state; 638 s->state=state; 639 cb(s,SSL_CB_CONNECT_LOOP,1); 640 s->state=new_state; 641 } 642 } 643 skip=0; 644 } 645end: 646 s->in_handshake--; 647 if (buf != NULL) 648 BUF_MEM_free(buf); 649 if (cb != NULL) 650 cb(s,SSL_CB_CONNECT_EXIT,ret); 651 return(ret); 652 } 653 654 655int ssl3_client_hello(SSL *s) 656 { 657 unsigned char *buf; 658 unsigned char *p,*d; 659 int i; 660 unsigned long l; 661#ifndef OPENSSL_NO_COMP 662 int j; 663 SSL_COMP *comp; 664#endif 665 666 buf=(unsigned char *)s->init_buf->data; 667 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) 668 { 669 SSL_SESSION *sess = s->session; 670 if ((sess == NULL) || 671 (sess->ssl_version != s->version) || 672#ifdef OPENSSL_NO_TLSEXT 673 !sess->session_id_length || 674#else 675 (!sess->session_id_length && !sess->tlsext_tick) || 676#endif 677 (sess->not_resumable)) 678 { 679 if (!ssl_get_new_session(s,0)) 680 goto err; 681 } 682 /* else use the pre-loaded session */ 683 684 p=s->s3->client_random; 685 686 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0) 687 goto err; 688 689 /* Do the message type and length last */ 690 d=p= &(buf[4]); 691 692 /* version indicates the negotiated version: for example from 693 * an SSLv2/v3 compatible client hello). The client_version 694 * field is the maximum version we permit and it is also 695 * used in RSA encrypted premaster secrets. Some servers can 696 * choke if we initially report a higher version then 697 * renegotiate to a lower one in the premaster secret. This 698 * didn't happen with TLS 1.0 as most servers supported it 699 * but it can with TLS 1.1 or later if the server only supports 700 * 1.0. 701 * 702 * Possible scenario with previous logic: 703 * 1. Client hello indicates TLS 1.2 704 * 2. Server hello says TLS 1.0 705 * 3. RSA encrypted premaster secret uses 1.2. 706 * 4. Handhaked proceeds using TLS 1.0. 707 * 5. Server sends hello request to renegotiate. 708 * 6. Client hello indicates TLS v1.0 as we now 709 * know that is maximum server supports. 710 * 7. Server chokes on RSA encrypted premaster secret 711 * containing version 1.0. 712 * 713 * For interoperability it should be OK to always use the 714 * maximum version we support in client hello and then rely 715 * on the checking of version to ensure the servers isn't 716 * being inconsistent: for example initially negotiating with 717 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using 718 * client_version in client hello and not resetting it to 719 * the negotiated version. 720 */ 721#if 0 722 *(p++)=s->version>>8; 723 *(p++)=s->version&0xff; 724 s->client_version=s->version; 725#else 726 *(p++)=s->client_version>>8; 727 *(p++)=s->client_version&0xff; 728#endif 729 730 /* Random stuff */ 731 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 732 p+=SSL3_RANDOM_SIZE; 733 734 /* Session ID */ 735 if (s->new_session) 736 i=0; 737 else 738 i=s->session->session_id_length; 739 *(p++)=i; 740 if (i != 0) 741 { 742 if (i > (int)sizeof(s->session->session_id)) 743 { 744 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 745 goto err; 746 } 747 memcpy(p,s->session->session_id,i); 748 p+=i; 749 } 750 751 /* Ciphers supported */ 752 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); 753 if (i == 0) 754 { 755 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 756 goto err; 757 } 758#ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH 759 /* Some servers hang if client hello > 256 bytes 760 * as hack workaround chop number of supported ciphers 761 * to keep it well below this if we use TLS v1.2 762 */ 763 if (TLS1_get_version(s) >= TLS1_2_VERSION 764 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) 765 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; 766#endif 767 s2n(i,p); 768 p+=i; 769 770 /* COMPRESSION */ 771#ifdef OPENSSL_NO_COMP 772 *(p++)=1; 773#else 774 775 if ((s->options & SSL_OP_NO_COMPRESSION) 776 || !s->ctx->comp_methods) 777 j=0; 778 else 779 j=sk_SSL_COMP_num(s->ctx->comp_methods); 780 *(p++)=1+j; 781 for (i=0; i<j; i++) 782 { 783 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 784 *(p++)=comp->id; 785 } 786#endif 787 *(p++)=0; /* Add the NULL method */ 788 789#ifndef OPENSSL_NO_TLSEXT 790 /* TLS extensions*/ 791 if (ssl_prepare_clienthello_tlsext(s) <= 0) 792 { 793 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); 794 goto err; 795 } 796 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) 797 { 798 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); 799 goto err; 800 } 801#endif 802 803 l=(p-d); 804 d=buf; 805 *(d++)=SSL3_MT_CLIENT_HELLO; 806 l2n3(l,d); 807 808 s->state=SSL3_ST_CW_CLNT_HELLO_B; 809 /* number of bytes to write */ 810 s->init_num=p-buf; 811 s->init_off=0; 812 } 813 814 /* SSL3_ST_CW_CLNT_HELLO_B */ 815 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 816err: 817 return(-1); 818 } 819 820int ssl3_get_server_hello(SSL *s) 821 { 822 STACK_OF(SSL_CIPHER) *sk; 823 const SSL_CIPHER *c; 824 unsigned char *p,*d; 825 int i,al,ok; 826 unsigned int j; 827 long n; 828#ifndef OPENSSL_NO_COMP 829 SSL_COMP *comp; 830#endif 831 832 n=s->method->ssl_get_message(s, 833 SSL3_ST_CR_SRVR_HELLO_A, 834 SSL3_ST_CR_SRVR_HELLO_B, 835 -1, 836 20000, /* ?? */ 837 &ok); 838 839 if (!ok) return((int)n); 840 841 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 842 { 843 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) 844 { 845 if ( s->d1->send_cookie == 0) 846 { 847 s->s3->tmp.reuse_message = 1; 848 return 1; 849 } 850 else /* already sent a cookie */ 851 { 852 al=SSL_AD_UNEXPECTED_MESSAGE; 853 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 854 goto f_err; 855 } 856 } 857 } 858 859 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) 860 { 861 al=SSL_AD_UNEXPECTED_MESSAGE; 862 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 863 goto f_err; 864 } 865 866 d=p=(unsigned char *)s->init_msg; 867 868 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 869 { 870 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 871 s->version=(s->version&0xff00)|p[1]; 872 al=SSL_AD_PROTOCOL_VERSION; 873 goto f_err; 874 } 875 p+=2; 876 877 /* load the server hello data */ 878 /* load the server random */ 879 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 880 p+=SSL3_RANDOM_SIZE; 881 882 /* get the session-id */ 883 j= *(p++); 884 885 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 886 { 887 al=SSL_AD_ILLEGAL_PARAMETER; 888 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 889 goto f_err; 890 } 891 892#ifndef OPENSSL_NO_TLSEXT 893 /* check if we want to resume the session based on external pre-shared secret */ 894 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb) 895 { 896 SSL_CIPHER *pref_cipher=NULL; 897 s->session->master_key_length=sizeof(s->session->master_key); 898 if (s->tls_session_secret_cb(s, s->session->master_key, 899 &s->session->master_key_length, 900 NULL, &pref_cipher, 901 s->tls_session_secret_cb_arg)) 902 { 903 s->session->cipher = pref_cipher ? 904 pref_cipher : ssl_get_cipher_by_char(s, p+j); 905 s->s3->flags |= SSL3_FLAGS_CCS_OK; 906 } 907 } 908#endif /* OPENSSL_NO_TLSEXT */ 909 910 if (j != 0 && j == s->session->session_id_length 911 && memcmp(p,s->session->session_id,j) == 0) 912 { 913 if(s->sid_ctx_length != s->session->sid_ctx_length 914 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 915 { 916 /* actually a client application bug */ 917 al=SSL_AD_ILLEGAL_PARAMETER; 918 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 919 goto f_err; 920 } 921 s->s3->flags |= SSL3_FLAGS_CCS_OK; 922 s->hit=1; 923 } 924 else /* a miss or crap from the other end */ 925 { 926 /* If we were trying for session-id reuse, make a new 927 * SSL_SESSION so we don't stuff up other people */ 928 s->hit=0; 929 if (s->session->session_id_length > 0) 930 { 931 if (!ssl_get_new_session(s,0)) 932 { 933 al=SSL_AD_INTERNAL_ERROR; 934 goto f_err; 935 } 936 } 937 s->session->session_id_length=j; 938 memcpy(s->session->session_id,p,j); /* j could be 0 */ 939 } 940 p+=j; 941 c=ssl_get_cipher_by_char(s,p); 942 if (c == NULL) 943 { 944 /* unknown cipher */ 945 al=SSL_AD_ILLEGAL_PARAMETER; 946 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 947 goto f_err; 948 } 949 /* TLS v1.2 only ciphersuites require v1.2 or later */ 950 if ((c->algorithm_ssl & SSL_TLSV1_2) && 951 (TLS1_get_version(s) < TLS1_2_VERSION)) 952 { 953 al=SSL_AD_ILLEGAL_PARAMETER; 954 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 955 goto f_err; 956 } 957#ifndef OPENSSL_NO_SRP 958 if (((c->algorithm_mkey & SSL_kSRP) || (c->algorithm_auth & SSL_aSRP)) && 959 !(s->srp_ctx.srp_Mask & SSL_kSRP)) 960 { 961 al=SSL_AD_ILLEGAL_PARAMETER; 962 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 963 goto f_err; 964 } 965#endif /* OPENSSL_NO_SRP */ 966 p+=ssl_put_cipher_by_char(s,NULL,NULL); 967 968 sk=ssl_get_ciphers_by_id(s); 969 i=sk_SSL_CIPHER_find(sk,c); 970 if (i < 0) 971 { 972 /* we did not say we would use this cipher */ 973 al=SSL_AD_ILLEGAL_PARAMETER; 974 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 975 goto f_err; 976 } 977 978 /* Depending on the session caching (internal/external), the cipher 979 and/or cipher_id values may not be set. Make sure that 980 cipher_id is set and use it for comparison. */ 981 if (s->session->cipher) 982 s->session->cipher_id = s->session->cipher->id; 983 if (s->hit && (s->session->cipher_id != c->id)) 984 { 985/* Workaround is now obsolete */ 986#if 0 987 if (!(s->options & 988 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 989#endif 990 { 991 al=SSL_AD_ILLEGAL_PARAMETER; 992 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 993 goto f_err; 994 } 995 } 996 s->s3->tmp.new_cipher=c; 997 /* Don't digest cached records if TLS v1.2: we may need them for 998 * client authentication. 999 */ 1000 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s)) 1001 { 1002 al = SSL_AD_INTERNAL_ERROR; 1003 goto f_err; 1004 } 1005 /* lets get the compression algorithm */ 1006 /* COMPRESSION */ 1007#ifdef OPENSSL_NO_COMP 1008 if (*(p++) != 0) 1009 { 1010 al=SSL_AD_ILLEGAL_PARAMETER; 1011 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1012 goto f_err; 1013 } 1014 /* If compression is disabled we'd better not try to resume a session 1015 * using compression. 1016 */ 1017 if (s->session->compress_meth != 0) 1018 { 1019 al=SSL_AD_INTERNAL_ERROR; 1020 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION); 1021 goto f_err; 1022 } 1023#else 1024 j= *(p++); 1025 if (s->hit && j != s->session->compress_meth) 1026 { 1027 al=SSL_AD_ILLEGAL_PARAMETER; 1028 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); 1029 goto f_err; 1030 } 1031 if (j == 0) 1032 comp=NULL; 1033 else if (s->options & SSL_OP_NO_COMPRESSION) 1034 { 1035 al=SSL_AD_ILLEGAL_PARAMETER; 1036 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED); 1037 goto f_err; 1038 } 1039 else 1040 comp=ssl3_comp_find(s->ctx->comp_methods,j); 1041 1042 if ((j != 0) && (comp == NULL)) 1043 { 1044 al=SSL_AD_ILLEGAL_PARAMETER; 1045 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1046 goto f_err; 1047 } 1048 else 1049 { 1050 s->s3->tmp.new_compression=comp; 1051 } 1052#endif 1053 1054#ifndef OPENSSL_NO_TLSEXT 1055 /* TLS extensions*/ 1056 if (s->version >= SSL3_VERSION) 1057 { 1058 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al)) 1059 { 1060 /* 'al' set by ssl_parse_serverhello_tlsext */ 1061 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT); 1062 goto f_err; 1063 } 1064 if (ssl_check_serverhello_tlsext(s) <= 0) 1065 { 1066 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); 1067 goto err; 1068 } 1069 } 1070#endif 1071 1072 if (p != (d+n)) 1073 { 1074 /* wrong packet length */ 1075 al=SSL_AD_DECODE_ERROR; 1076 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 1077 goto f_err; 1078 } 1079 1080 return(1); 1081f_err: 1082 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1083err: 1084 return(-1); 1085 } 1086 1087int ssl3_get_server_certificate(SSL *s) 1088 { 1089 int al,i,ok,ret= -1; 1090 unsigned long n,nc,llen,l; 1091 X509 *x=NULL; 1092 const unsigned char *q,*p; 1093 unsigned char *d; 1094 STACK_OF(X509) *sk=NULL; 1095 SESS_CERT *sc; 1096 EVP_PKEY *pkey=NULL; 1097 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 1098 1099 n=s->method->ssl_get_message(s, 1100 SSL3_ST_CR_CERT_A, 1101 SSL3_ST_CR_CERT_B, 1102 -1, 1103 s->max_cert_list, 1104 &ok); 1105 1106 if (!ok) return((int)n); 1107 1108 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 1109 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) && 1110 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) 1111 { 1112 s->s3->tmp.reuse_message=1; 1113 return(1); 1114 } 1115 1116 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 1117 { 1118 al=SSL_AD_UNEXPECTED_MESSAGE; 1119 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 1120 goto f_err; 1121 } 1122 p=d=(unsigned char *)s->init_msg; 1123 1124 if ((sk=sk_X509_new_null()) == NULL) 1125 { 1126 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1127 goto err; 1128 } 1129 1130 n2l3(p,llen); 1131 if (llen+3 != n) 1132 { 1133 al=SSL_AD_DECODE_ERROR; 1134 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 1135 goto f_err; 1136 } 1137 for (nc=0; nc<llen; ) 1138 { 1139 n2l3(p,l); 1140 if ((l+nc+3) > llen) 1141 { 1142 al=SSL_AD_DECODE_ERROR; 1143 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1144 goto f_err; 1145 } 1146 1147 q=p; 1148 x=d2i_X509(NULL,&q,l); 1149 if (x == NULL) 1150 { 1151 al=SSL_AD_BAD_CERTIFICATE; 1152 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 1153 goto f_err; 1154 } 1155 if (q != (p+l)) 1156 { 1157 al=SSL_AD_DECODE_ERROR; 1158 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1159 goto f_err; 1160 } 1161 if (!sk_X509_push(sk,x)) 1162 { 1163 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1164 goto err; 1165 } 1166 x=NULL; 1167 nc+=l+3; 1168 p=q; 1169 } 1170 1171 i=ssl_verify_cert_chain(s,sk); 1172 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 1173#ifndef OPENSSL_NO_KRB5 1174 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1175 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1176#endif /* OPENSSL_NO_KRB5 */ 1177 ) 1178 { 1179 al=ssl_verify_alarm_type(s->verify_result); 1180 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 1181 goto f_err; 1182 } 1183 ERR_clear_error(); /* but we keep s->verify_result */ 1184 1185 sc=ssl_sess_cert_new(); 1186 if (sc == NULL) goto err; 1187 1188 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 1189 s->session->sess_cert=sc; 1190 1191 sc->cert_chain=sk; 1192 /* Inconsistency alert: cert_chain does include the peer's 1193 * certificate, which we don't include in s3_srvr.c */ 1194 x=sk_X509_value(sk,0); 1195 sk=NULL; 1196 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 1197 1198 pkey=X509_get_pubkey(x); 1199 1200 /* VRS: allow null cert if auth == KRB5 */ 1201 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1202 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1203 ? 0 : 1; 1204 1205#ifdef KSSL_DEBUG 1206 printf("pkey,x = %p, %p\n", pkey,x); 1207 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 1208 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name, 1209 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert); 1210#endif /* KSSL_DEBUG */ 1211 1212 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 1213 { 1214 x=NULL; 1215 al=SSL3_AL_FATAL; 1216 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1217 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1218 goto f_err; 1219 } 1220 1221 i=ssl_cert_type(x,pkey); 1222 if (need_cert && i < 0) 1223 { 1224 x=NULL; 1225 al=SSL3_AL_FATAL; 1226 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1227 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1228 goto f_err; 1229 } 1230 1231 if (need_cert) 1232 { 1233 sc->peer_cert_type=i; 1234 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1235 /* Why would the following ever happen? 1236 * We just created sc a couple of lines ago. */ 1237 if (sc->peer_pkeys[i].x509 != NULL) 1238 X509_free(sc->peer_pkeys[i].x509); 1239 sc->peer_pkeys[i].x509=x; 1240 sc->peer_key= &(sc->peer_pkeys[i]); 1241 1242 if (s->session->peer != NULL) 1243 X509_free(s->session->peer); 1244 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1245 s->session->peer=x; 1246 } 1247 else 1248 { 1249 sc->peer_cert_type=i; 1250 sc->peer_key= NULL; 1251 1252 if (s->session->peer != NULL) 1253 X509_free(s->session->peer); 1254 s->session->peer=NULL; 1255 } 1256 s->session->verify_result = s->verify_result; 1257 1258 x=NULL; 1259 ret=1; 1260 1261 if (0) 1262 { 1263f_err: 1264 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1265 } 1266err: 1267 EVP_PKEY_free(pkey); 1268 X509_free(x); 1269 sk_X509_pop_free(sk,X509_free); 1270 return(ret); 1271 } 1272 1273int ssl3_get_key_exchange(SSL *s) 1274 { 1275#ifndef OPENSSL_NO_RSA 1276 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 1277#endif 1278 EVP_MD_CTX md_ctx; 1279 unsigned char *param,*p; 1280 int al,j,ok; 1281 long i,param_len,n,alg_k,alg_a; 1282 EVP_PKEY *pkey=NULL; 1283 const EVP_MD *md = NULL; 1284#ifndef OPENSSL_NO_RSA 1285 RSA *rsa=NULL; 1286#endif 1287#ifndef OPENSSL_NO_DH 1288 DH *dh=NULL; 1289#endif 1290#ifndef OPENSSL_NO_ECDH 1291 EC_KEY *ecdh = NULL; 1292 BN_CTX *bn_ctx = NULL; 1293 EC_POINT *srvr_ecpoint = NULL; 1294 int curve_nid = 0; 1295 int encoded_pt_len = 0; 1296#endif 1297 1298 /* use same message size as in ssl3_get_certificate_request() 1299 * as ServerKeyExchange message may be skipped */ 1300 n=s->method->ssl_get_message(s, 1301 SSL3_ST_CR_KEY_EXCH_A, 1302 SSL3_ST_CR_KEY_EXCH_B, 1303 -1, 1304 s->max_cert_list, 1305 &ok); 1306 if (!ok) return((int)n); 1307 1308 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 1309 { 1310#ifndef OPENSSL_NO_PSK 1311 /* In plain PSK ciphersuite, ServerKeyExchange can be 1312 omitted if no identity hint is sent. Set 1313 session->sess_cert anyway to avoid problems 1314 later.*/ 1315 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kPSK) 1316 { 1317 s->session->sess_cert=ssl_sess_cert_new(); 1318 if (s->ctx->psk_identity_hint) 1319 OPENSSL_free(s->ctx->psk_identity_hint); 1320 s->ctx->psk_identity_hint = NULL; 1321 } 1322#endif 1323 s->s3->tmp.reuse_message=1; 1324 return(1); 1325 } 1326 1327 param=p=(unsigned char *)s->init_msg; 1328 if (s->session->sess_cert != NULL) 1329 { 1330#ifndef OPENSSL_NO_RSA 1331 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1332 { 1333 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1334 s->session->sess_cert->peer_rsa_tmp=NULL; 1335 } 1336#endif 1337#ifndef OPENSSL_NO_DH 1338 if (s->session->sess_cert->peer_dh_tmp) 1339 { 1340 DH_free(s->session->sess_cert->peer_dh_tmp); 1341 s->session->sess_cert->peer_dh_tmp=NULL; 1342 } 1343#endif 1344#ifndef OPENSSL_NO_ECDH 1345 if (s->session->sess_cert->peer_ecdh_tmp) 1346 { 1347 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1348 s->session->sess_cert->peer_ecdh_tmp=NULL; 1349 } 1350#endif 1351 } 1352 else 1353 { 1354 s->session->sess_cert=ssl_sess_cert_new(); 1355 } 1356 1357 /* Total length of the parameters including the length prefix */ 1358 param_len=0; 1359 1360 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 1361 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 1362 EVP_MD_CTX_init(&md_ctx); 1363 1364 al=SSL_AD_DECODE_ERROR; 1365 1366#ifndef OPENSSL_NO_PSK 1367 if (alg_k & SSL_kPSK) 1368 { 1369 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1]; 1370 1371 param_len = 2; 1372 if (param_len > n) 1373 { 1374 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1375 SSL_R_LENGTH_TOO_SHORT); 1376 goto f_err; 1377 } 1378 n2s(p,i); 1379 1380 /* Store PSK identity hint for later use, hint is used 1381 * in ssl3_send_client_key_exchange. Assume that the 1382 * maximum length of a PSK identity hint can be as 1383 * long as the maximum length of a PSK identity. */ 1384 if (i > PSK_MAX_IDENTITY_LEN) 1385 { 1386 al=SSL_AD_HANDSHAKE_FAILURE; 1387 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1388 SSL_R_DATA_LENGTH_TOO_LONG); 1389 goto f_err; 1390 } 1391 if (i > n - param_len) 1392 { 1393 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1394 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); 1395 goto f_err; 1396 } 1397 param_len += i; 1398 1399 /* If received PSK identity hint contains NULL 1400 * characters, the hint is truncated from the first 1401 * NULL. p may not be ending with NULL, so create a 1402 * NULL-terminated string. */ 1403 memcpy(tmp_id_hint, p, i); 1404 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i); 1405 if (s->ctx->psk_identity_hint != NULL) 1406 OPENSSL_free(s->ctx->psk_identity_hint); 1407 s->ctx->psk_identity_hint = BUF_strdup(tmp_id_hint); 1408 if (s->ctx->psk_identity_hint == NULL) 1409 { 1410 al=SSL_AD_HANDSHAKE_FAILURE; 1411 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1412 goto f_err; 1413 } 1414 1415 p+=i; 1416 n-=param_len; 1417 } 1418 else 1419#endif /* !OPENSSL_NO_PSK */ 1420#ifndef OPENSSL_NO_SRP 1421 if (alg_k & SSL_kSRP) 1422 { 1423 param_len = 2; 1424 if (param_len > n) 1425 { 1426 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1427 SSL_R_LENGTH_TOO_SHORT); 1428 goto f_err; 1429 } 1430 n2s(p,i); 1431 1432 if (i > n - param_len) 1433 { 1434 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH); 1435 goto f_err; 1436 } 1437 param_len += i; 1438 1439 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL))) 1440 { 1441 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1442 goto err; 1443 } 1444 p+=i; 1445 1446 1447 if (2 > n - param_len) 1448 { 1449 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1450 SSL_R_LENGTH_TOO_SHORT); 1451 goto f_err; 1452 } 1453 param_len += 2; 1454 1455 n2s(p,i); 1456 1457 if (i > n - param_len) 1458 { 1459 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH); 1460 goto f_err; 1461 } 1462 param_len += i; 1463 1464 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL))) 1465 { 1466 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1467 goto err; 1468 } 1469 p+=i; 1470 1471 1472 if (1 > n - param_len) 1473 { 1474 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1475 SSL_R_LENGTH_TOO_SHORT); 1476 goto f_err; 1477 } 1478 param_len += 1; 1479 1480 i = (unsigned int)(p[0]); 1481 p++; 1482 1483 if (i > n - param_len) 1484 { 1485 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH); 1486 goto f_err; 1487 } 1488 param_len += i; 1489 1490 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL))) 1491 { 1492 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1493 goto err; 1494 } 1495 p+=i; 1496 1497 if (2 > n - param_len) 1498 { 1499 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1500 SSL_R_LENGTH_TOO_SHORT); 1501 goto f_err; 1502 } 1503 param_len += 2; 1504 1505 n2s(p,i); 1506 1507 if (i > n - param_len) 1508 { 1509 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH); 1510 goto f_err; 1511 } 1512 param_len += i; 1513 1514 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL))) 1515 { 1516 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1517 goto err; 1518 } 1519 p+=i; 1520 n-=param_len; 1521 1522 if (!srp_verify_server_param(s, &al)) 1523 { 1524 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_PARAMETERS); 1525 goto f_err; 1526 } 1527 1528/* We must check if there is a certificate */ 1529#ifndef OPENSSL_NO_RSA 1530 if (alg_a & SSL_aRSA) 1531 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1532#else 1533 if (0) 1534 ; 1535#endif 1536#ifndef OPENSSL_NO_DSA 1537 else if (alg_a & SSL_aDSS) 1538 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1539#endif 1540 } 1541 else 1542#endif /* !OPENSSL_NO_SRP */ 1543#ifndef OPENSSL_NO_RSA 1544 if (alg_k & SSL_kRSA) 1545 { 1546 if ((rsa=RSA_new()) == NULL) 1547 { 1548 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1549 goto err; 1550 } 1551 1552 param_len = 2; 1553 if (param_len > n) 1554 { 1555 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1556 SSL_R_LENGTH_TOO_SHORT); 1557 goto f_err; 1558 } 1559 n2s(p,i); 1560 1561 if (i > n - param_len) 1562 { 1563 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1564 goto f_err; 1565 } 1566 param_len += i; 1567 1568 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1569 { 1570 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1571 goto err; 1572 } 1573 p+=i; 1574 1575 if (2 > n - param_len) 1576 { 1577 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1578 SSL_R_LENGTH_TOO_SHORT); 1579 goto f_err; 1580 } 1581 param_len += 2; 1582 1583 n2s(p,i); 1584 1585 if (i > n - param_len) 1586 { 1587 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1588 goto f_err; 1589 } 1590 param_len += i; 1591 1592 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1593 { 1594 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1595 goto err; 1596 } 1597 p+=i; 1598 n-=param_len; 1599 1600 /* this should be because we are using an export cipher */ 1601 if (alg_a & SSL_aRSA) 1602 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1603 else 1604 { 1605 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1606 goto err; 1607 } 1608 s->session->sess_cert->peer_rsa_tmp=rsa; 1609 rsa=NULL; 1610 } 1611#else /* OPENSSL_NO_RSA */ 1612 if (0) 1613 ; 1614#endif 1615#ifndef OPENSSL_NO_DH 1616 else if (alg_k & SSL_kEDH) 1617 { 1618 if ((dh=DH_new()) == NULL) 1619 { 1620 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1621 goto err; 1622 } 1623 1624 param_len = 2; 1625 if (param_len > n) 1626 { 1627 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1628 SSL_R_LENGTH_TOO_SHORT); 1629 goto f_err; 1630 } 1631 n2s(p,i); 1632 1633 if (i > n - param_len) 1634 { 1635 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1636 goto f_err; 1637 } 1638 param_len += i; 1639 1640 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1641 { 1642 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1643 goto err; 1644 } 1645 p+=i; 1646 1647 if (2 > n - param_len) 1648 { 1649 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1650 SSL_R_LENGTH_TOO_SHORT); 1651 goto f_err; 1652 } 1653 param_len += 2; 1654 1655 n2s(p,i); 1656 1657 if (i > n - param_len) 1658 { 1659 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1660 goto f_err; 1661 } 1662 param_len += i; 1663 1664 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1665 { 1666 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1667 goto err; 1668 } 1669 p+=i; 1670 1671 if (2 > n - param_len) 1672 { 1673 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1674 SSL_R_LENGTH_TOO_SHORT); 1675 goto f_err; 1676 } 1677 param_len += 2; 1678 1679 n2s(p,i); 1680 1681 if (i > n - param_len) 1682 { 1683 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1684 goto f_err; 1685 } 1686 param_len += i; 1687 1688 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1689 { 1690 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1691 goto err; 1692 } 1693 p+=i; 1694 n-=param_len; 1695 1696#ifndef OPENSSL_NO_RSA 1697 if (alg_a & SSL_aRSA) 1698 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1699#else 1700 if (0) 1701 ; 1702#endif 1703#ifndef OPENSSL_NO_DSA 1704 else if (alg_a & SSL_aDSS) 1705 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1706#endif 1707 /* else anonymous DH, so no certificate or pkey. */ 1708 1709 s->session->sess_cert->peer_dh_tmp=dh; 1710 dh=NULL; 1711 } 1712 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd)) 1713 { 1714 al=SSL_AD_ILLEGAL_PARAMETER; 1715 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1716 goto f_err; 1717 } 1718#endif /* !OPENSSL_NO_DH */ 1719 1720#ifndef OPENSSL_NO_ECDH 1721 else if (alg_k & SSL_kEECDH) 1722 { 1723 EC_GROUP *ngroup; 1724 const EC_GROUP *group; 1725 1726 if ((ecdh=EC_KEY_new()) == NULL) 1727 { 1728 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1729 goto err; 1730 } 1731 1732 /* Extract elliptic curve parameters and the 1733 * server's ephemeral ECDH public key. 1734 * Keep accumulating lengths of various components in 1735 * param_len and make sure it never exceeds n. 1736 */ 1737 1738 /* XXX: For now we only support named (not generic) curves 1739 * and the ECParameters in this case is just three bytes. We 1740 * also need one byte for the length of the encoded point 1741 */ 1742 param_len=4; 1743 if (param_len > n) 1744 { 1745 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1746 SSL_R_LENGTH_TOO_SHORT); 1747 goto f_err; 1748 } 1749 1750 if ((*p != NAMED_CURVE_TYPE) || 1751 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) 1752 { 1753 al=SSL_AD_INTERNAL_ERROR; 1754 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1755 goto f_err; 1756 } 1757 1758 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1759 if (ngroup == NULL) 1760 { 1761 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1762 goto err; 1763 } 1764 if (EC_KEY_set_group(ecdh, ngroup) == 0) 1765 { 1766 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1767 goto err; 1768 } 1769 EC_GROUP_free(ngroup); 1770 1771 group = EC_KEY_get0_group(ecdh); 1772 1773 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1774 (EC_GROUP_get_degree(group) > 163)) 1775 { 1776 al=SSL_AD_EXPORT_RESTRICTION; 1777 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1778 goto f_err; 1779 } 1780 1781 p+=3; 1782 1783 /* Next, get the encoded ECPoint */ 1784 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1785 ((bn_ctx = BN_CTX_new()) == NULL)) 1786 { 1787 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1788 goto err; 1789 } 1790 1791 encoded_pt_len = *p; /* length of encoded point */ 1792 p+=1; 1793 1794 if ((encoded_pt_len > n - param_len) || 1795 (EC_POINT_oct2point(group, srvr_ecpoint, 1796 p, encoded_pt_len, bn_ctx) == 0)) 1797 { 1798 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT); 1799 goto f_err; 1800 } 1801 param_len += encoded_pt_len; 1802 1803 n-=param_len; 1804 p+=encoded_pt_len; 1805 1806 /* The ECC/TLS specification does not mention 1807 * the use of DSA to sign ECParameters in the server 1808 * key exchange message. We do support RSA and ECDSA. 1809 */ 1810 if (0) ; 1811#ifndef OPENSSL_NO_RSA 1812 else if (alg_a & SSL_aRSA) 1813 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1814#endif 1815#ifndef OPENSSL_NO_ECDSA 1816 else if (alg_a & SSL_aECDSA) 1817 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1818#endif 1819 /* else anonymous ECDH, so no certificate or pkey. */ 1820 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1821 s->session->sess_cert->peer_ecdh_tmp=ecdh; 1822 ecdh=NULL; 1823 BN_CTX_free(bn_ctx); 1824 bn_ctx = NULL; 1825 EC_POINT_free(srvr_ecpoint); 1826 srvr_ecpoint = NULL; 1827 } 1828 else if (alg_k) 1829 { 1830 al=SSL_AD_UNEXPECTED_MESSAGE; 1831 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1832 goto f_err; 1833 } 1834#endif /* !OPENSSL_NO_ECDH */ 1835 1836 1837 /* p points to the next byte, there are 'n' bytes left */ 1838 1839 /* if it was signed, check the signature */ 1840 if (pkey != NULL) 1841 { 1842 if (TLS1_get_version(s) >= TLS1_2_VERSION) 1843 { 1844 int sigalg; 1845 if (2 > n) 1846 { 1847 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1848 SSL_R_LENGTH_TOO_SHORT); 1849 goto f_err; 1850 } 1851 1852 sigalg = tls12_get_sigid(pkey); 1853 /* Should never happen */ 1854 if (sigalg == -1) 1855 { 1856 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1857 goto err; 1858 } 1859 /* Check key type is consistent with signature */ 1860 if (sigalg != (int)p[1]) 1861 { 1862 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE); 1863 al=SSL_AD_DECODE_ERROR; 1864 goto f_err; 1865 } 1866 md = tls12_get_hash(p[0]); 1867 if (md == NULL) 1868 { 1869 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST); 1870 goto f_err; 1871 } 1872#ifdef SSL_DEBUG 1873fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); 1874#endif 1875 p += 2; 1876 n -= 2; 1877 } 1878 else 1879 md = EVP_sha1(); 1880 1881 if (2 > n) 1882 { 1883 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1884 SSL_R_LENGTH_TOO_SHORT); 1885 goto f_err; 1886 } 1887 n2s(p,i); 1888 n-=2; 1889 j=EVP_PKEY_size(pkey); 1890 1891 /* Check signature length. If n is 0 then signature is empty */ 1892 if ((i != n) || (n > j) || (n <= 0)) 1893 { 1894 /* wrong packet length */ 1895 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1896 goto f_err; 1897 } 1898 1899#ifndef OPENSSL_NO_RSA 1900 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION) 1901 { 1902 int num; 1903 unsigned int size; 1904 1905 j=0; 1906 q=md_buf; 1907 for (num=2; num > 0; num--) 1908 { 1909 EVP_MD_CTX_set_flags(&md_ctx, 1910 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1911 EVP_DigestInit_ex(&md_ctx,(num == 2) 1912 ?s->ctx->md5:s->ctx->sha1, NULL); 1913 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1914 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1915 EVP_DigestUpdate(&md_ctx,param,param_len); 1916 EVP_DigestFinal_ex(&md_ctx,q,&size); 1917 q+=size; 1918 j+=size; 1919 } 1920 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1921 pkey->pkey.rsa); 1922 if (i < 0) 1923 { 1924 al=SSL_AD_DECRYPT_ERROR; 1925 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1926 goto f_err; 1927 } 1928 if (i == 0) 1929 { 1930 /* bad signature */ 1931 al=SSL_AD_DECRYPT_ERROR; 1932 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1933 goto f_err; 1934 } 1935 } 1936 else 1937#endif 1938 { 1939 EVP_VerifyInit_ex(&md_ctx, md, NULL); 1940 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1941 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1942 EVP_VerifyUpdate(&md_ctx,param,param_len); 1943 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1944 { 1945 /* bad signature */ 1946 al=SSL_AD_DECRYPT_ERROR; 1947 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1948 goto f_err; 1949 } 1950 } 1951 } 1952 else 1953 { 1954 /* aNULL, aSRP or kPSK do not need public keys */ 1955 if (!(alg_a & (SSL_aNULL|SSL_aSRP)) && !(alg_k & SSL_kPSK)) 1956 { 1957 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1958 goto err; 1959 } 1960 /* still data left over */ 1961 if (n != 0) 1962 { 1963 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1964 goto f_err; 1965 } 1966 } 1967 EVP_PKEY_free(pkey); 1968 EVP_MD_CTX_cleanup(&md_ctx); 1969 return(1); 1970f_err: 1971 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1972err: 1973 EVP_PKEY_free(pkey); 1974#ifndef OPENSSL_NO_RSA 1975 if (rsa != NULL) 1976 RSA_free(rsa); 1977#endif 1978#ifndef OPENSSL_NO_DH 1979 if (dh != NULL) 1980 DH_free(dh); 1981#endif 1982#ifndef OPENSSL_NO_ECDH 1983 BN_CTX_free(bn_ctx); 1984 EC_POINT_free(srvr_ecpoint); 1985 if (ecdh != NULL) 1986 EC_KEY_free(ecdh); 1987#endif 1988 EVP_MD_CTX_cleanup(&md_ctx); 1989 return(-1); 1990 } 1991 1992int ssl3_get_certificate_request(SSL *s) 1993 { 1994 int ok,ret=0; 1995 unsigned long n,nc,l; 1996 unsigned int llen, ctype_num,i; 1997 X509_NAME *xn=NULL; 1998 const unsigned char *p,*q; 1999 unsigned char *d; 2000 STACK_OF(X509_NAME) *ca_sk=NULL; 2001 2002 n=s->method->ssl_get_message(s, 2003 SSL3_ST_CR_CERT_REQ_A, 2004 SSL3_ST_CR_CERT_REQ_B, 2005 -1, 2006 s->max_cert_list, 2007 &ok); 2008 2009 if (!ok) return((int)n); 2010 2011 s->s3->tmp.cert_req=0; 2012 2013 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 2014 { 2015 s->s3->tmp.reuse_message=1; 2016 /* If we get here we don't need any cached handshake records 2017 * as we wont be doing client auth. 2018 */ 2019 if (s->s3->handshake_buffer) 2020 { 2021 if (!ssl3_digest_cached_records(s)) 2022 goto err; 2023 } 2024 return(1); 2025 } 2026 2027 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 2028 { 2029 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2030 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 2031 goto err; 2032 } 2033 2034 /* TLS does not like anon-DH with client cert */ 2035 if (s->version > SSL3_VERSION) 2036 { 2037 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) 2038 { 2039 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2040 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 2041 goto err; 2042 } 2043 } 2044 2045 p=d=(unsigned char *)s->init_msg; 2046 2047 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 2048 { 2049 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 2050 goto err; 2051 } 2052 2053 /* get the certificate types */ 2054 ctype_num= *(p++); 2055 if (ctype_num > SSL3_CT_NUMBER) 2056 ctype_num=SSL3_CT_NUMBER; 2057 for (i=0; i<ctype_num; i++) 2058 s->s3->tmp.ctype[i]= p[i]; 2059 p+=ctype_num; 2060 if (TLS1_get_version(s) >= TLS1_2_VERSION) 2061 { 2062 n2s(p, llen); 2063 /* Check we have enough room for signature algorithms and 2064 * following length value. 2065 */ 2066 if ((unsigned long)(p - d + llen + 2) > n) 2067 { 2068 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2069 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG); 2070 goto err; 2071 } 2072 if ((llen & 1) || !tls1_process_sigalgs(s, p, llen)) 2073 { 2074 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2075 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR); 2076 goto err; 2077 } 2078 p += llen; 2079 } 2080 2081 /* get the CA RDNs */ 2082 n2s(p,llen); 2083#if 0 2084{ 2085FILE *out; 2086out=fopen("/tmp/vsign.der","w"); 2087fwrite(p,1,llen,out); 2088fclose(out); 2089} 2090#endif 2091 2092 if ((unsigned long)(p - d + llen) != n) 2093 { 2094 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2095 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 2096 goto err; 2097 } 2098 2099 for (nc=0; nc<llen; ) 2100 { 2101 n2s(p,l); 2102 if ((l+nc+2) > llen) 2103 { 2104 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 2105 goto cont; /* netscape bugs */ 2106 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2107 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 2108 goto err; 2109 } 2110 2111 q=p; 2112 2113 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 2114 { 2115 /* If netscape tolerance is on, ignore errors */ 2116 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 2117 goto cont; 2118 else 2119 { 2120 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2121 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 2122 goto err; 2123 } 2124 } 2125 2126 if (q != (p+l)) 2127 { 2128 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2129 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 2130 goto err; 2131 } 2132 if (!sk_X509_NAME_push(ca_sk,xn)) 2133 { 2134 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 2135 goto err; 2136 } 2137 2138 p+=l; 2139 nc+=l+2; 2140 } 2141 2142 if (0) 2143 { 2144cont: 2145 ERR_clear_error(); 2146 } 2147 2148 /* we should setup a certificate to return.... */ 2149 s->s3->tmp.cert_req=1; 2150 s->s3->tmp.ctype_num=ctype_num; 2151 if (s->s3->tmp.ca_names != NULL) 2152 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 2153 s->s3->tmp.ca_names=ca_sk; 2154 ca_sk=NULL; 2155 2156 ret=1; 2157err: 2158 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 2159 return(ret); 2160 } 2161 2162static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 2163 { 2164 return(X509_NAME_cmp(*a,*b)); 2165 } 2166#ifndef OPENSSL_NO_TLSEXT 2167int ssl3_get_new_session_ticket(SSL *s) 2168 { 2169 int ok,al,ret=0, ticklen; 2170 long n; 2171 const unsigned char *p; 2172 unsigned char *d; 2173 2174 n=s->method->ssl_get_message(s, 2175 SSL3_ST_CR_SESSION_TICKET_A, 2176 SSL3_ST_CR_SESSION_TICKET_B, 2177 -1, 2178 16384, 2179 &ok); 2180 2181 if (!ok) 2182 return((int)n); 2183 2184 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 2185 { 2186 s->s3->tmp.reuse_message=1; 2187 return(1); 2188 } 2189 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) 2190 { 2191 al=SSL_AD_UNEXPECTED_MESSAGE; 2192 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE); 2193 goto f_err; 2194 } 2195 if (n < 6) 2196 { 2197 /* need at least ticket_lifetime_hint + ticket length */ 2198 al = SSL_AD_DECODE_ERROR; 2199 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2200 goto f_err; 2201 } 2202 2203 p=d=(unsigned char *)s->init_msg; 2204 n2l(p, s->session->tlsext_tick_lifetime_hint); 2205 n2s(p, ticklen); 2206 /* ticket_lifetime_hint + ticket_length + ticket */ 2207 if (ticklen + 6 != n) 2208 { 2209 al = SSL_AD_DECODE_ERROR; 2210 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2211 goto f_err; 2212 } 2213 if (s->session->tlsext_tick) 2214 { 2215 OPENSSL_free(s->session->tlsext_tick); 2216 s->session->tlsext_ticklen = 0; 2217 } 2218 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 2219 if (!s->session->tlsext_tick) 2220 { 2221 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 2222 goto err; 2223 } 2224 memcpy(s->session->tlsext_tick, p, ticklen); 2225 s->session->tlsext_ticklen = ticklen; 2226 /* There are two ways to detect a resumed ticket sesion. 2227 * One is to set an appropriate session ID and then the server 2228 * must return a match in ServerHello. This allows the normal 2229 * client session ID matching to work and we know much 2230 * earlier that the ticket has been accepted. 2231 * 2232 * The other way is to set zero length session ID when the 2233 * ticket is presented and rely on the handshake to determine 2234 * session resumption. 2235 * 2236 * We choose the former approach because this fits in with 2237 * assumptions elsewhere in OpenSSL. The session ID is set 2238 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 2239 * ticket. 2240 */ 2241 EVP_Digest(p, ticklen, 2242 s->session->session_id, &s->session->session_id_length, 2243#ifndef OPENSSL_NO_SHA256 2244 EVP_sha256(), NULL); 2245#else 2246 EVP_sha1(), NULL); 2247#endif 2248 ret=1; 2249 return(ret); 2250f_err: 2251 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2252err: 2253 return(-1); 2254 } 2255 2256int ssl3_get_cert_status(SSL *s) 2257 { 2258 int ok, al; 2259 unsigned long resplen,n; 2260 const unsigned char *p; 2261 2262 n=s->method->ssl_get_message(s, 2263 SSL3_ST_CR_CERT_STATUS_A, 2264 SSL3_ST_CR_CERT_STATUS_B, 2265 SSL3_MT_CERTIFICATE_STATUS, 2266 16384, 2267 &ok); 2268 2269 if (!ok) return((int)n); 2270 if (n < 4) 2271 { 2272 /* need at least status type + length */ 2273 al = SSL_AD_DECODE_ERROR; 2274 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2275 goto f_err; 2276 } 2277 p = (unsigned char *)s->init_msg; 2278 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 2279 { 2280 al = SSL_AD_DECODE_ERROR; 2281 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 2282 goto f_err; 2283 } 2284 n2l3(p, resplen); 2285 if (resplen + 4 != n) 2286 { 2287 al = SSL_AD_DECODE_ERROR; 2288 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2289 goto f_err; 2290 } 2291 if (s->tlsext_ocsp_resp) 2292 OPENSSL_free(s->tlsext_ocsp_resp); 2293 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 2294 if (!s->tlsext_ocsp_resp) 2295 { 2296 al = SSL_AD_INTERNAL_ERROR; 2297 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2298 goto f_err; 2299 } 2300 s->tlsext_ocsp_resplen = resplen; 2301 if (s->ctx->tlsext_status_cb) 2302 { 2303 int ret; 2304 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 2305 if (ret == 0) 2306 { 2307 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 2308 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 2309 goto f_err; 2310 } 2311 if (ret < 0) 2312 { 2313 al = SSL_AD_INTERNAL_ERROR; 2314 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2315 goto f_err; 2316 } 2317 } 2318 return 1; 2319f_err: 2320 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2321 return(-1); 2322 } 2323#endif 2324 2325int ssl3_get_server_done(SSL *s) 2326 { 2327 int ok,ret=0; 2328 long n; 2329 2330 n=s->method->ssl_get_message(s, 2331 SSL3_ST_CR_SRVR_DONE_A, 2332 SSL3_ST_CR_SRVR_DONE_B, 2333 SSL3_MT_SERVER_DONE, 2334 30, /* should be very small, like 0 :-) */ 2335 &ok); 2336 2337 if (!ok) return((int)n); 2338 if (n > 0) 2339 { 2340 /* should contain no data */ 2341 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2342 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 2343 return -1; 2344 } 2345 ret=1; 2346 return(ret); 2347 } 2348 2349 2350int ssl3_send_client_key_exchange(SSL *s) 2351 { 2352 unsigned char *p,*d; 2353 int n; 2354 unsigned long alg_k; 2355#ifndef OPENSSL_NO_RSA 2356 unsigned char *q; 2357 EVP_PKEY *pkey=NULL; 2358#endif 2359#ifndef OPENSSL_NO_KRB5 2360 KSSL_ERR kssl_err; 2361#endif /* OPENSSL_NO_KRB5 */ 2362#ifndef OPENSSL_NO_ECDH 2363 EC_KEY *clnt_ecdh = NULL; 2364 const EC_POINT *srvr_ecpoint = NULL; 2365 EVP_PKEY *srvr_pub_pkey = NULL; 2366 unsigned char *encodedPoint = NULL; 2367 int encoded_pt_len = 0; 2368 BN_CTX * bn_ctx = NULL; 2369#endif 2370 2371 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 2372 { 2373 d=(unsigned char *)s->init_buf->data; 2374 p= &(d[4]); 2375 2376 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 2377 2378 /* Fool emacs indentation */ 2379 if (0) {} 2380#ifndef OPENSSL_NO_RSA 2381 else if (alg_k & SSL_kRSA) 2382 { 2383 RSA *rsa; 2384 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2385 2386 if (s->session->sess_cert == NULL) 2387 { 2388 /* We should always have a server certificate with SSL_kRSA. */ 2389 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2390 goto err; 2391 } 2392 2393 if (s->session->sess_cert->peer_rsa_tmp != NULL) 2394 rsa=s->session->sess_cert->peer_rsa_tmp; 2395 else 2396 { 2397 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 2398 if ((pkey == NULL) || 2399 (pkey->type != EVP_PKEY_RSA) || 2400 (pkey->pkey.rsa == NULL)) 2401 { 2402 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2403 goto err; 2404 } 2405 rsa=pkey->pkey.rsa; 2406 EVP_PKEY_free(pkey); 2407 } 2408 2409 tmp_buf[0]=s->client_version>>8; 2410 tmp_buf[1]=s->client_version&0xff; 2411 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2412 goto err; 2413 2414 s->session->master_key_length=sizeof tmp_buf; 2415 2416 q=p; 2417 /* Fix buf for TLS and beyond */ 2418 if (s->version > SSL3_VERSION) 2419 p+=2; 2420 n=RSA_public_encrypt(sizeof tmp_buf, 2421 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 2422#ifdef PKCS1_CHECK 2423 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 2424 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 2425#endif 2426 if (n <= 0) 2427 { 2428 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 2429 goto err; 2430 } 2431 2432 /* Fix buf for TLS and beyond */ 2433 if (s->version > SSL3_VERSION) 2434 { 2435 s2n(n,q); 2436 n+=2; 2437 } 2438 2439 s->session->master_key_length= 2440 s->method->ssl3_enc->generate_master_secret(s, 2441 s->session->master_key, 2442 tmp_buf,sizeof tmp_buf); 2443 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 2444 } 2445#endif 2446#ifndef OPENSSL_NO_KRB5 2447 else if (alg_k & SSL_kKRB5) 2448 { 2449 krb5_error_code krb5rc; 2450 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2451 /* krb5_data krb5_ap_req; */ 2452 krb5_data *enc_ticket; 2453 krb5_data authenticator, *authp = NULL; 2454 EVP_CIPHER_CTX ciph_ctx; 2455 const EVP_CIPHER *enc = NULL; 2456 unsigned char iv[EVP_MAX_IV_LENGTH]; 2457 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2458 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 2459 + EVP_MAX_IV_LENGTH]; 2460 int padl, outl = sizeof(epms); 2461 2462 EVP_CIPHER_CTX_init(&ciph_ctx); 2463 2464#ifdef KSSL_DEBUG 2465 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 2466 alg_k, SSL_kKRB5); 2467#endif /* KSSL_DEBUG */ 2468 2469 authp = NULL; 2470#ifdef KRB5SENDAUTH 2471 if (KRB5SENDAUTH) authp = &authenticator; 2472#endif /* KRB5SENDAUTH */ 2473 2474 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 2475 &kssl_err); 2476 enc = kssl_map_enc(kssl_ctx->enctype); 2477 if (enc == NULL) 2478 goto err; 2479#ifdef KSSL_DEBUG 2480 { 2481 printf("kssl_cget_tkt rtn %d\n", krb5rc); 2482 if (krb5rc && kssl_err.text) 2483 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 2484 } 2485#endif /* KSSL_DEBUG */ 2486 2487 if (krb5rc) 2488 { 2489 ssl3_send_alert(s,SSL3_AL_FATAL, 2490 SSL_AD_HANDSHAKE_FAILURE); 2491 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2492 kssl_err.reason); 2493 goto err; 2494 } 2495 2496 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2497 ** in place of RFC 2712 KerberosWrapper, as in: 2498 ** 2499 ** Send ticket (copy to *p, set n = length) 2500 ** n = krb5_ap_req.length; 2501 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2502 ** if (krb5_ap_req.data) 2503 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2504 ** 2505 ** Now using real RFC 2712 KerberosWrapper 2506 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 2507 ** Note: 2712 "opaque" types are here replaced 2508 ** with a 2-byte length followed by the value. 2509 ** Example: 2510 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2511 ** Where "xx xx" = length bytes. Shown here with 2512 ** optional authenticator omitted. 2513 */ 2514 2515 /* KerberosWrapper.Ticket */ 2516 s2n(enc_ticket->length,p); 2517 memcpy(p, enc_ticket->data, enc_ticket->length); 2518 p+= enc_ticket->length; 2519 n = enc_ticket->length + 2; 2520 2521 /* KerberosWrapper.Authenticator */ 2522 if (authp && authp->length) 2523 { 2524 s2n(authp->length,p); 2525 memcpy(p, authp->data, authp->length); 2526 p+= authp->length; 2527 n+= authp->length + 2; 2528 2529 free(authp->data); 2530 authp->data = NULL; 2531 authp->length = 0; 2532 } 2533 else 2534 { 2535 s2n(0,p);/* null authenticator length */ 2536 n+=2; 2537 } 2538 2539 tmp_buf[0]=s->client_version>>8; 2540 tmp_buf[1]=s->client_version&0xff; 2541 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2542 goto err; 2543 2544 /* 20010420 VRS. Tried it this way; failed. 2545 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2546 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2547 ** kssl_ctx->length); 2548 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2549 */ 2550 2551 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2552 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2553 kssl_ctx->key,iv); 2554 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2555 sizeof tmp_buf); 2556 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2557 outl += padl; 2558 if (outl > (int)sizeof epms) 2559 { 2560 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2561 goto err; 2562 } 2563 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2564 2565 /* KerberosWrapper.EncryptedPreMasterSecret */ 2566 s2n(outl,p); 2567 memcpy(p, epms, outl); 2568 p+=outl; 2569 n+=outl + 2; 2570 2571 s->session->master_key_length= 2572 s->method->ssl3_enc->generate_master_secret(s, 2573 s->session->master_key, 2574 tmp_buf, sizeof tmp_buf); 2575 2576 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2577 OPENSSL_cleanse(epms, outl); 2578 } 2579#endif 2580#ifndef OPENSSL_NO_DH 2581 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2582 { 2583 DH *dh_srvr,*dh_clnt; 2584 2585 if (s->session->sess_cert == NULL) 2586 { 2587 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2588 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2589 goto err; 2590 } 2591 2592 if (s->session->sess_cert->peer_dh_tmp != NULL) 2593 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2594 else 2595 { 2596 /* we get them from the cert */ 2597 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2598 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2599 goto err; 2600 } 2601 2602 /* generate a new random key */ 2603 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2604 { 2605 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2606 goto err; 2607 } 2608 if (!DH_generate_key(dh_clnt)) 2609 { 2610 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2611 DH_free(dh_clnt); 2612 goto err; 2613 } 2614 2615 /* use the 'p' output buffer for the DH key, but 2616 * make sure to clear it out afterwards */ 2617 2618 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2619 2620 if (n <= 0) 2621 { 2622 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2623 DH_free(dh_clnt); 2624 goto err; 2625 } 2626 2627 /* generate master key from the result */ 2628 s->session->master_key_length= 2629 s->method->ssl3_enc->generate_master_secret(s, 2630 s->session->master_key,p,n); 2631 /* clean up */ 2632 memset(p,0,n); 2633 2634 /* send off the data */ 2635 n=BN_num_bytes(dh_clnt->pub_key); 2636 s2n(n,p); 2637 BN_bn2bin(dh_clnt->pub_key,p); 2638 n+=2; 2639 2640 DH_free(dh_clnt); 2641 2642 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2643 } 2644#endif 2645 2646#ifndef OPENSSL_NO_ECDH 2647 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) 2648 { 2649 const EC_GROUP *srvr_group = NULL; 2650 EC_KEY *tkey; 2651 int ecdh_clnt_cert = 0; 2652 int field_size = 0; 2653 2654 if (s->session->sess_cert == NULL) 2655 { 2656 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2657 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2658 goto err; 2659 } 2660 2661 /* Did we send out the client's 2662 * ECDH share for use in premaster 2663 * computation as part of client certificate? 2664 * If so, set ecdh_clnt_cert to 1. 2665 */ 2666 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) 2667 { 2668 /* XXX: For now, we do not support client 2669 * authentication using ECDH certificates. 2670 * To add such support, one needs to add 2671 * code that checks for appropriate 2672 * conditions and sets ecdh_clnt_cert to 1. 2673 * For example, the cert have an ECC 2674 * key on the same curve as the server's 2675 * and the key should be authorized for 2676 * key agreement. 2677 * 2678 * One also needs to add code in ssl3_connect 2679 * to skip sending the certificate verify 2680 * message. 2681 * 2682 * if ((s->cert->key->privatekey != NULL) && 2683 * (s->cert->key->privatekey->type == 2684 * EVP_PKEY_EC) && ...) 2685 * ecdh_clnt_cert = 1; 2686 */ 2687 } 2688 2689 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2690 { 2691 tkey = s->session->sess_cert->peer_ecdh_tmp; 2692 } 2693 else 2694 { 2695 /* Get the Server Public Key from Cert */ 2696 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2697 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2698 if ((srvr_pub_pkey == NULL) || 2699 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2700 (srvr_pub_pkey->pkey.ec == NULL)) 2701 { 2702 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2703 ERR_R_INTERNAL_ERROR); 2704 goto err; 2705 } 2706 2707 tkey = srvr_pub_pkey->pkey.ec; 2708 } 2709 2710 srvr_group = EC_KEY_get0_group(tkey); 2711 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2712 2713 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2714 { 2715 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2716 ERR_R_INTERNAL_ERROR); 2717 goto err; 2718 } 2719 2720 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2721 { 2722 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2723 goto err; 2724 } 2725 2726 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2727 { 2728 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2729 goto err; 2730 } 2731 if (ecdh_clnt_cert) 2732 { 2733 /* Reuse key info from our certificate 2734 * We only need our private key to perform 2735 * the ECDH computation. 2736 */ 2737 const BIGNUM *priv_key; 2738 tkey = s->cert->key->privatekey->pkey.ec; 2739 priv_key = EC_KEY_get0_private_key(tkey); 2740 if (priv_key == NULL) 2741 { 2742 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2743 goto err; 2744 } 2745 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2746 { 2747 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2748 goto err; 2749 } 2750 } 2751 else 2752 { 2753 /* Generate a new ECDH key pair */ 2754 if (!(EC_KEY_generate_key(clnt_ecdh))) 2755 { 2756 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2757 goto err; 2758 } 2759 } 2760 2761 /* use the 'p' output buffer for the ECDH key, but 2762 * make sure to clear it out afterwards 2763 */ 2764 2765 field_size = EC_GROUP_get_degree(srvr_group); 2766 if (field_size <= 0) 2767 { 2768 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2769 ERR_R_ECDH_LIB); 2770 goto err; 2771 } 2772 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2773 if (n <= 0) 2774 { 2775 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2776 ERR_R_ECDH_LIB); 2777 goto err; 2778 } 2779 2780 /* generate master key from the result */ 2781 s->session->master_key_length = s->method->ssl3_enc \ 2782 -> generate_master_secret(s, 2783 s->session->master_key, 2784 p, n); 2785 2786 memset(p, 0, n); /* clean up */ 2787 2788 if (ecdh_clnt_cert) 2789 { 2790 /* Send empty client key exch message */ 2791 n = 0; 2792 } 2793 else 2794 { 2795 /* First check the size of encoding and 2796 * allocate memory accordingly. 2797 */ 2798 encoded_pt_len = 2799 EC_POINT_point2oct(srvr_group, 2800 EC_KEY_get0_public_key(clnt_ecdh), 2801 POINT_CONVERSION_UNCOMPRESSED, 2802 NULL, 0, NULL); 2803 2804 encodedPoint = (unsigned char *) 2805 OPENSSL_malloc(encoded_pt_len * 2806 sizeof(unsigned char)); 2807 bn_ctx = BN_CTX_new(); 2808 if ((encodedPoint == NULL) || 2809 (bn_ctx == NULL)) 2810 { 2811 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2812 goto err; 2813 } 2814 2815 /* Encode the public key */ 2816 n = EC_POINT_point2oct(srvr_group, 2817 EC_KEY_get0_public_key(clnt_ecdh), 2818 POINT_CONVERSION_UNCOMPRESSED, 2819 encodedPoint, encoded_pt_len, bn_ctx); 2820 2821 *p = n; /* length of encoded point */ 2822 /* Encoded point will be copied here */ 2823 p += 1; 2824 /* copy the point */ 2825 memcpy((unsigned char *)p, encodedPoint, n); 2826 /* increment n to account for length field */ 2827 n += 1; 2828 } 2829 2830 /* Free allocated memory */ 2831 BN_CTX_free(bn_ctx); 2832 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2833 if (clnt_ecdh != NULL) 2834 EC_KEY_free(clnt_ecdh); 2835 EVP_PKEY_free(srvr_pub_pkey); 2836 } 2837#endif /* !OPENSSL_NO_ECDH */ 2838 else if (alg_k & SSL_kGOST) 2839 { 2840 /* GOST key exchange message creation */ 2841 EVP_PKEY_CTX *pkey_ctx; 2842 X509 *peer_cert; 2843 size_t msglen; 2844 unsigned int md_len; 2845 int keytype; 2846 unsigned char premaster_secret[32],shared_ukm[32], tmp[256]; 2847 EVP_MD_CTX *ukm_hash; 2848 EVP_PKEY *pub_key; 2849 2850 /* Get server sertificate PKEY and create ctx from it */ 2851 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509; 2852 if (!peer_cert) 2853 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509; 2854 if (!peer_cert) { 2855 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); 2856 goto err; 2857 } 2858 2859 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL); 2860 /* If we have send a certificate, and certificate key 2861 2862 * parameters match those of server certificate, use 2863 * certificate key for key exchange 2864 */ 2865 2866 /* Otherwise, generate ephemeral key pair */ 2867 2868 EVP_PKEY_encrypt_init(pkey_ctx); 2869 /* Generate session key */ 2870 RAND_bytes(premaster_secret,32); 2871 /* If we have client certificate, use its secret as peer key */ 2872 if (s->s3->tmp.cert_req && s->cert->key->privatekey) { 2873 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) { 2874 /* If there was an error - just ignore it. Ephemeral key 2875 * would be used 2876 */ 2877 ERR_clear_error(); 2878 } 2879 } 2880 /* Compute shared IV and store it in algorithm-specific 2881 * context data */ 2882 ukm_hash = EVP_MD_CTX_create(); 2883 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94)); 2884 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE); 2885 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE); 2886 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); 2887 EVP_MD_CTX_destroy(ukm_hash); 2888 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV, 2889 8,shared_ukm)<0) { 2890 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2891 SSL_R_LIBRARY_BUG); 2892 goto err; 2893 } 2894 /* Make GOST keytransport blob message */ 2895 /*Encapsulate it into sequence */ 2896 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; 2897 msglen=255; 2898 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) { 2899 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2900 SSL_R_LIBRARY_BUG); 2901 goto err; 2902 } 2903 if (msglen >= 0x80) 2904 { 2905 *(p++)=0x81; 2906 *(p++)= msglen & 0xff; 2907 n=msglen+3; 2908 } 2909 else 2910 { 2911 *(p++)= msglen & 0xff; 2912 n=msglen+2; 2913 } 2914 memcpy(p, tmp, msglen); 2915 /* Check if pubkey from client certificate was used */ 2916 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) 2917 { 2918 /* Set flag "skip certificate verify" */ 2919 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; 2920 } 2921 EVP_PKEY_CTX_free(pkey_ctx); 2922 s->session->master_key_length= 2923 s->method->ssl3_enc->generate_master_secret(s, 2924 s->session->master_key,premaster_secret,32); 2925 EVP_PKEY_free(pub_key); 2926 2927 } 2928#ifndef OPENSSL_NO_SRP 2929 else if (alg_k & SSL_kSRP) 2930 { 2931 if (s->srp_ctx.A != NULL) 2932 { 2933 /* send off the data */ 2934 n=BN_num_bytes(s->srp_ctx.A); 2935 s2n(n,p); 2936 BN_bn2bin(s->srp_ctx.A,p); 2937 n+=2; 2938 } 2939 else 2940 { 2941 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2942 goto err; 2943 } 2944 if (s->session->srp_username != NULL) 2945 OPENSSL_free(s->session->srp_username); 2946 s->session->srp_username = BUF_strdup(s->srp_ctx.login); 2947 if (s->session->srp_username == NULL) 2948 { 2949 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2950 ERR_R_MALLOC_FAILURE); 2951 goto err; 2952 } 2953 2954 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0) 2955 { 2956 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2957 goto err; 2958 } 2959 } 2960#endif 2961#ifndef OPENSSL_NO_PSK 2962 else if (alg_k & SSL_kPSK) 2963 { 2964 /* The callback needs PSK_MAX_IDENTITY_LEN + 1 bytes 2965 * to return a \0-terminated identity. The last byte 2966 * is for us for simulating strnlen. */ 2967 char identity[PSK_MAX_IDENTITY_LEN + 2]; 2968 size_t identity_len; 2969 unsigned char *t = NULL; 2970 unsigned char psk_or_pre_ms[PSK_MAX_PSK_LEN*2+4]; 2971 unsigned int pre_ms_len = 0, psk_len = 0; 2972 int psk_err = 1; 2973 2974 n = 0; 2975 if (s->psk_client_callback == NULL) 2976 { 2977 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2978 SSL_R_PSK_NO_CLIENT_CB); 2979 goto err; 2980 } 2981 2982 memset(identity, 0, sizeof(identity)); 2983 psk_len = s->psk_client_callback(s, s->ctx->psk_identity_hint, 2984 identity, sizeof(identity) - 1, 2985 psk_or_pre_ms, sizeof(psk_or_pre_ms)); 2986 if (psk_len > PSK_MAX_PSK_LEN) 2987 { 2988 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2989 ERR_R_INTERNAL_ERROR); 2990 goto psk_err; 2991 } 2992 else if (psk_len == 0) 2993 { 2994 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2995 SSL_R_PSK_IDENTITY_NOT_FOUND); 2996 goto psk_err; 2997 } 2998 identity[PSK_MAX_IDENTITY_LEN + 1] = '\0'; 2999 identity_len = strlen(identity); 3000 if (identity_len > PSK_MAX_IDENTITY_LEN) 3001 { 3002 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3003 ERR_R_INTERNAL_ERROR); 3004 goto psk_err; 3005 } 3006 /* create PSK pre_master_secret */ 3007 pre_ms_len = 2+psk_len+2+psk_len; 3008 t = psk_or_pre_ms; 3009 memmove(psk_or_pre_ms+psk_len+4, psk_or_pre_ms, psk_len); 3010 s2n(psk_len, t); 3011 memset(t, 0, psk_len); 3012 t+=psk_len; 3013 s2n(psk_len, t); 3014 3015 if (s->session->psk_identity_hint != NULL) 3016 OPENSSL_free(s->session->psk_identity_hint); 3017 s->session->psk_identity_hint = BUF_strdup(s->ctx->psk_identity_hint); 3018 if (s->ctx->psk_identity_hint != NULL && 3019 s->session->psk_identity_hint == NULL) 3020 { 3021 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3022 ERR_R_MALLOC_FAILURE); 3023 goto psk_err; 3024 } 3025 3026 if (s->session->psk_identity != NULL) 3027 OPENSSL_free(s->session->psk_identity); 3028 s->session->psk_identity = BUF_strdup(identity); 3029 if (s->session->psk_identity == NULL) 3030 { 3031 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3032 ERR_R_MALLOC_FAILURE); 3033 goto psk_err; 3034 } 3035 3036 s->session->master_key_length = 3037 s->method->ssl3_enc->generate_master_secret(s, 3038 s->session->master_key, 3039 psk_or_pre_ms, pre_ms_len); 3040 s2n(identity_len, p); 3041 memcpy(p, identity, identity_len); 3042 n = 2 + identity_len; 3043 psk_err = 0; 3044 psk_err: 3045 OPENSSL_cleanse(identity, sizeof(identity)); 3046 OPENSSL_cleanse(psk_or_pre_ms, sizeof(psk_or_pre_ms)); 3047 if (psk_err != 0) 3048 { 3049 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 3050 goto err; 3051 } 3052 } 3053#endif 3054 else 3055 { 3056 ssl3_send_alert(s, SSL3_AL_FATAL, 3057 SSL_AD_HANDSHAKE_FAILURE); 3058 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3059 ERR_R_INTERNAL_ERROR); 3060 goto err; 3061 } 3062 3063 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 3064 l2n3(n,d); 3065 3066 s->state=SSL3_ST_CW_KEY_EXCH_B; 3067 /* number of bytes to write */ 3068 s->init_num=n+4; 3069 s->init_off=0; 3070 } 3071 3072 /* SSL3_ST_CW_KEY_EXCH_B */ 3073 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3074err: 3075#ifndef OPENSSL_NO_ECDH 3076 BN_CTX_free(bn_ctx); 3077 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 3078 if (clnt_ecdh != NULL) 3079 EC_KEY_free(clnt_ecdh); 3080 EVP_PKEY_free(srvr_pub_pkey); 3081#endif 3082 return(-1); 3083 } 3084 3085int ssl3_send_client_verify(SSL *s) 3086 { 3087 unsigned char *p,*d; 3088 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 3089 EVP_PKEY *pkey; 3090 EVP_PKEY_CTX *pctx=NULL; 3091 EVP_MD_CTX mctx; 3092 unsigned u=0; 3093 unsigned long n; 3094 int j; 3095 3096 EVP_MD_CTX_init(&mctx); 3097 3098 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 3099 { 3100 d=(unsigned char *)s->init_buf->data; 3101 p= &(d[4]); 3102 pkey=s->cert->key->privatekey; 3103/* Create context from key and test if sha1 is allowed as digest */ 3104 pctx = EVP_PKEY_CTX_new(pkey,NULL); 3105 EVP_PKEY_sign_init(pctx); 3106 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0) 3107 { 3108 if (TLS1_get_version(s) < TLS1_2_VERSION) 3109 s->method->ssl3_enc->cert_verify_mac(s, 3110 NID_sha1, 3111 &(data[MD5_DIGEST_LENGTH])); 3112 } 3113 else 3114 { 3115 ERR_clear_error(); 3116 } 3117 /* For TLS v1.2 send signature algorithm and signature 3118 * using agreed digest and cached handshake records. 3119 */ 3120 if (TLS1_get_version(s) >= TLS1_2_VERSION) 3121 { 3122 long hdatalen = 0; 3123 void *hdata; 3124 const EVP_MD *md = s->cert->key->digest; 3125 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, 3126 &hdata); 3127 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) 3128 { 3129 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3130 ERR_R_INTERNAL_ERROR); 3131 goto err; 3132 } 3133 p += 2; 3134#ifdef SSL_DEBUG 3135 fprintf(stderr, "Using TLS 1.2 with client alg %s\n", 3136 EVP_MD_name(md)); 3137#endif 3138 if (!EVP_SignInit_ex(&mctx, md, NULL) 3139 || !EVP_SignUpdate(&mctx, hdata, hdatalen) 3140 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) 3141 { 3142 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3143 ERR_R_EVP_LIB); 3144 goto err; 3145 } 3146 s2n(u,p); 3147 n = u + 4; 3148 if (!ssl3_digest_cached_records(s)) 3149 goto err; 3150 } 3151 else 3152#ifndef OPENSSL_NO_RSA 3153 if (pkey->type == EVP_PKEY_RSA) 3154 { 3155 s->method->ssl3_enc->cert_verify_mac(s, 3156 NID_md5, 3157 &(data[0])); 3158 if (RSA_sign(NID_md5_sha1, data, 3159 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 3160 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 3161 { 3162 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 3163 goto err; 3164 } 3165 s2n(u,p); 3166 n=u+2; 3167 } 3168 else 3169#endif 3170#ifndef OPENSSL_NO_DSA 3171 if (pkey->type == EVP_PKEY_DSA) 3172 { 3173 if (!DSA_sign(pkey->save_type, 3174 &(data[MD5_DIGEST_LENGTH]), 3175 SHA_DIGEST_LENGTH,&(p[2]), 3176 (unsigned int *)&j,pkey->pkey.dsa)) 3177 { 3178 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 3179 goto err; 3180 } 3181 s2n(j,p); 3182 n=j+2; 3183 } 3184 else 3185#endif 3186#ifndef OPENSSL_NO_ECDSA 3187 if (pkey->type == EVP_PKEY_EC) 3188 { 3189 if (!ECDSA_sign(pkey->save_type, 3190 &(data[MD5_DIGEST_LENGTH]), 3191 SHA_DIGEST_LENGTH,&(p[2]), 3192 (unsigned int *)&j,pkey->pkey.ec)) 3193 { 3194 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3195 ERR_R_ECDSA_LIB); 3196 goto err; 3197 } 3198 s2n(j,p); 3199 n=j+2; 3200 } 3201 else 3202#endif 3203 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) 3204 { 3205 unsigned char signbuf[64]; 3206 int i; 3207 size_t sigsize=64; 3208 s->method->ssl3_enc->cert_verify_mac(s, 3209 NID_id_GostR3411_94, 3210 data); 3211 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { 3212 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3213 ERR_R_INTERNAL_ERROR); 3214 goto err; 3215 } 3216 for (i=63,j=0; i>=0; j++, i--) { 3217 p[2+j]=signbuf[i]; 3218 } 3219 s2n(j,p); 3220 n=j+2; 3221 } 3222 else 3223 { 3224 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 3225 goto err; 3226 } 3227 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 3228 l2n3(n,d); 3229 3230 s->state=SSL3_ST_CW_CERT_VRFY_B; 3231 s->init_num=(int)n+4; 3232 s->init_off=0; 3233 } 3234 EVP_MD_CTX_cleanup(&mctx); 3235 EVP_PKEY_CTX_free(pctx); 3236 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3237err: 3238 EVP_MD_CTX_cleanup(&mctx); 3239 EVP_PKEY_CTX_free(pctx); 3240 return(-1); 3241 } 3242 3243int ssl3_send_client_certificate(SSL *s) 3244 { 3245 X509 *x509=NULL; 3246 EVP_PKEY *pkey=NULL; 3247 int i; 3248 unsigned long l; 3249 3250 if (s->state == SSL3_ST_CW_CERT_A) 3251 { 3252 if ((s->cert == NULL) || 3253 (s->cert->key->x509 == NULL) || 3254 (s->cert->key->privatekey == NULL)) 3255 s->state=SSL3_ST_CW_CERT_B; 3256 else 3257 s->state=SSL3_ST_CW_CERT_C; 3258 } 3259 3260 /* We need to get a client cert */ 3261 if (s->state == SSL3_ST_CW_CERT_B) 3262 { 3263 /* If we get an error, we need to 3264 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 3265 * We then get retied later */ 3266 i=0; 3267 i = ssl_do_client_cert_cb(s, &x509, &pkey); 3268 if (i < 0) 3269 { 3270 s->rwstate=SSL_X509_LOOKUP; 3271 return(-1); 3272 } 3273 s->rwstate=SSL_NOTHING; 3274 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 3275 { 3276 s->state=SSL3_ST_CW_CERT_B; 3277 if ( !SSL_use_certificate(s,x509) || 3278 !SSL_use_PrivateKey(s,pkey)) 3279 i=0; 3280 } 3281 else if (i == 1) 3282 { 3283 i=0; 3284 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 3285 } 3286 3287 if (x509 != NULL) X509_free(x509); 3288 if (pkey != NULL) EVP_PKEY_free(pkey); 3289 if (i == 0) 3290 { 3291 if (s->version == SSL3_VERSION) 3292 { 3293 s->s3->tmp.cert_req=0; 3294 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 3295 return(1); 3296 } 3297 else 3298 { 3299 s->s3->tmp.cert_req=2; 3300 } 3301 } 3302 3303 /* Ok, we have a cert */ 3304 s->state=SSL3_ST_CW_CERT_C; 3305 } 3306 3307 if (s->state == SSL3_ST_CW_CERT_C) 3308 { 3309 s->state=SSL3_ST_CW_CERT_D; 3310 l=ssl3_output_cert_chain(s, 3311 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 3312 s->init_num=(int)l; 3313 s->init_off=0; 3314 } 3315 /* SSL3_ST_CW_CERT_D */ 3316 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3317 } 3318 3319#define has_bits(i,m) (((i)&(m)) == (m)) 3320 3321int ssl3_check_cert_and_algorithm(SSL *s) 3322 { 3323 int i,idx; 3324 long alg_k,alg_a; 3325 EVP_PKEY *pkey=NULL; 3326 SESS_CERT *sc; 3327#ifndef OPENSSL_NO_RSA 3328 RSA *rsa; 3329#endif 3330#ifndef OPENSSL_NO_DH 3331 DH *dh; 3332#endif 3333 3334 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 3335 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 3336 3337 /* we don't have a certificate */ 3338 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || (alg_k & SSL_kPSK)) 3339 return(1); 3340 3341 sc=s->session->sess_cert; 3342 if (sc == NULL) 3343 { 3344 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 3345 goto err; 3346 } 3347 3348#ifndef OPENSSL_NO_RSA 3349 rsa=s->session->sess_cert->peer_rsa_tmp; 3350#endif 3351#ifndef OPENSSL_NO_DH 3352 dh=s->session->sess_cert->peer_dh_tmp; 3353#endif 3354 3355 /* This is the passed certificate */ 3356 3357 idx=sc->peer_cert_type; 3358#ifndef OPENSSL_NO_ECDH 3359 if (idx == SSL_PKEY_ECC) 3360 { 3361 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 3362 s) == 0) 3363 { /* check failed */ 3364 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 3365 goto f_err; 3366 } 3367 else 3368 { 3369 return 1; 3370 } 3371 } 3372#endif 3373 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 3374 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 3375 EVP_PKEY_free(pkey); 3376 3377 3378 /* Check that we have a certificate if we require one */ 3379 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 3380 { 3381 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 3382 goto f_err; 3383 } 3384#ifndef OPENSSL_NO_DSA 3385 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 3386 { 3387 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 3388 goto f_err; 3389 } 3390#endif 3391#ifndef OPENSSL_NO_RSA 3392 if ((alg_k & SSL_kRSA) && 3393 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 3394 { 3395 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 3396 goto f_err; 3397 } 3398#endif 3399#ifndef OPENSSL_NO_DH 3400 if ((alg_k & SSL_kEDH) && 3401 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 3402 { 3403 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 3404 goto f_err; 3405 } 3406 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 3407 { 3408 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 3409 goto f_err; 3410 } 3411#ifndef OPENSSL_NO_DSA 3412 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 3413 { 3414 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 3415 goto f_err; 3416 } 3417#endif 3418#endif 3419 3420 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 3421 { 3422#ifndef OPENSSL_NO_RSA 3423 if (alg_k & SSL_kRSA) 3424 { 3425 if (rsa == NULL 3426 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3427 { 3428 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 3429 goto f_err; 3430 } 3431 } 3432 else 3433#endif 3434#ifndef OPENSSL_NO_DH 3435 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 3436 { 3437 if (dh == NULL 3438 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3439 { 3440 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 3441 goto f_err; 3442 } 3443 } 3444 else 3445#endif 3446 { 3447 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 3448 goto f_err; 3449 } 3450 } 3451 return(1); 3452f_err: 3453 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 3454err: 3455 return(0); 3456 } 3457 3458#if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 3459int ssl3_send_next_proto(SSL *s) 3460 { 3461 unsigned int len, padding_len; 3462 unsigned char *d; 3463 3464 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) 3465 { 3466 len = s->next_proto_negotiated_len; 3467 padding_len = 32 - ((len + 2) % 32); 3468 d = (unsigned char *)s->init_buf->data; 3469 d[4] = len; 3470 memcpy(d + 5, s->next_proto_negotiated, len); 3471 d[5 + len] = padding_len; 3472 memset(d + 6 + len, 0, padding_len); 3473 *(d++)=SSL3_MT_NEXT_PROTO; 3474 l2n3(2 + len + padding_len, d); 3475 s->state = SSL3_ST_CW_NEXT_PROTO_B; 3476 s->init_num = 4 + 2 + len + padding_len; 3477 s->init_off = 0; 3478 } 3479 3480 return ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3481} 3482#endif /* !OPENSSL_NO_TLSEXT && !OPENSSL_NO_NEXTPROTONEG */ 3483 3484/* Check to see if handshake is full or resumed. Usually this is just a 3485 * case of checking to see if a cache hit has occurred. In the case of 3486 * session tickets we have to check the next message to be sure. 3487 */ 3488 3489#ifndef OPENSSL_NO_TLSEXT 3490int ssl3_check_finished(SSL *s) 3491 { 3492 int ok; 3493 long n; 3494 /* If we have no ticket it cannot be a resumed session. */ 3495 if (!s->session->tlsext_tick) 3496 return 1; 3497 /* this function is called when we really expect a Certificate 3498 * message, so permit appropriate message length */ 3499 n=s->method->ssl_get_message(s, 3500 SSL3_ST_CR_CERT_A, 3501 SSL3_ST_CR_CERT_B, 3502 -1, 3503 s->max_cert_list, 3504 &ok); 3505 if (!ok) return((int)n); 3506 s->s3->tmp.reuse_message = 1; 3507 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 3508 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 3509 return 2; 3510 3511 return 1; 3512 } 3513#endif 3514 3515int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 3516 { 3517 int i = 0; 3518#ifndef OPENSSL_NO_ENGINE 3519 if (s->ctx->client_cert_engine) 3520 { 3521 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 3522 SSL_get_client_CA_list(s), 3523 px509, ppkey, NULL, NULL, NULL); 3524 if (i != 0) 3525 return i; 3526 } 3527#endif 3528 if (s->ctx->client_cert_cb) 3529 i = s->ctx->client_cert_cb(s,px509,ppkey); 3530 return i; 3531 } 3532