1 /* ssl/s3_clnt.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh (at) cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay (at) cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 /* ==================================================================== 59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. 60 * 61 * Redistribution and use in source and binary forms, with or without 62 * modification, are permitted provided that the following conditions 63 * are met: 64 * 65 * 1. Redistributions of source code must retain the above copyright 66 * notice, this list of conditions and the following disclaimer. 67 * 68 * 2. Redistributions in binary form must reproduce the above copyright 69 * notice, this list of conditions and the following disclaimer in 70 * the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3. All advertising materials mentioning features or use of this 74 * software must display the following acknowledgment: 75 * "This product includes software developed by the OpenSSL Project 76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" 77 * 78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 79 * endorse or promote products derived from this software without 80 * prior written permission. For written permission, please contact 81 * openssl-core (at) openssl.org. 82 * 83 * 5. Products derived from this software may not be called "OpenSSL" 84 * nor may "OpenSSL" appear in their names without prior written 85 * permission of the OpenSSL Project. 86 * 87 * 6. Redistributions of any form whatsoever must retain the following 88 * acknowledgment: 89 * "This product includes software developed by the OpenSSL Project 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103 * OF THE POSSIBILITY OF SUCH DAMAGE. 104 * ==================================================================== 105 * 106 * This product includes cryptographic software written by Eric Young 107 * (eay (at) cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh (at) cryptsoft.com). 109 * 110 */ 111 /* ==================================================================== 112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 113 * 114 * Portions of the attached software ("Contribution") are developed by 115 * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. 116 * 117 * The Contribution is licensed pursuant to the OpenSSL open source 118 * license provided above. 119 * 120 * ECC cipher suite support in OpenSSL originally written by 121 * Vipul Gupta and Sumit Gupta of Sun Microsystems Laboratories. 122 * 123 */ 124 /* ==================================================================== 125 * Copyright 2005 Nokia. All rights reserved. 126 * 127 * The portions of the attached software ("Contribution") is developed by 128 * Nokia Corporation and is licensed pursuant to the OpenSSL open source 129 * license. 130 * 131 * The Contribution, originally written by Mika Kousa and Pasi Eronen of 132 * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites 133 * support (see RFC 4279) to OpenSSL. 134 * 135 * No patent licenses or other rights except those expressly stated in 136 * the OpenSSL open source license shall be deemed granted or received 137 * expressly, by implication, estoppel, or otherwise. 138 * 139 * No assurances are provided by Nokia that the Contribution does not 140 * infringe the patent or other intellectual property rights of any third 141 * party or that the license provides you with all the necessary rights 142 * to make use of the Contribution. 143 * 144 * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN 145 * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA 146 * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY 147 * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR 148 * OTHERWISE. 149 */ 150 151 #include <stdio.h> 152 #include "ssl_locl.h" 153 #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 169 170 static const SSL_METHOD *ssl3_get_client_method(int ver); 171 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b); 172 173 static 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 } 180 181 IMPLEMENT_ssl3_meth_func(SSLv3_client_method, 182 ssl_undefined_function, 183 ssl3_connect, 184 ssl3_get_client_method) 185 186 int 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 if (SSL_get_mode(s) & SSL_MODE_HANDSHAKE_CUTTHROUGH) 219 { 220 /* Send app data along with CCS/Finished */ 221 s->s3->flags |= SSL3_FLAGS_DELAY_CLIENT_FINISHED; 222 } 223 224 for (;;) 225 { 226 state=s->state; 227 228 switch(s->state) 229 { 230 case SSL_ST_RENEGOTIATE: 231 s->renegotiate=1; 232 s->state=SSL_ST_CONNECT; 233 s->ctx->stats.sess_connect_renegotiate++; 234 /* break */ 235 case SSL_ST_BEFORE: 236 case SSL_ST_CONNECT: 237 case SSL_ST_BEFORE|SSL_ST_CONNECT: 238 case SSL_ST_OK|SSL_ST_CONNECT: 239 240 s->server=0; 241 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); 242 243 if ((s->version & 0xff00 ) != 0x0300) 244 { 245 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR); 246 ret = -1; 247 goto end; 248 } 249 250 /* s->version=SSL3_VERSION; */ 251 s->type=SSL_ST_CONNECT; 252 253 if (s->init_buf == NULL) 254 { 255 if ((buf=BUF_MEM_new()) == NULL) 256 { 257 ret= -1; 258 goto end; 259 } 260 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) 261 { 262 ret= -1; 263 goto end; 264 } 265 s->init_buf=buf; 266 buf=NULL; 267 } 268 269 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } 270 271 /* setup buffing BIO */ 272 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; } 273 274 /* don't push the buffering BIO quite yet */ 275 276 ssl3_init_finished_mac(s); 277 278 s->state=SSL3_ST_CW_CLNT_HELLO_A; 279 s->ctx->stats.sess_connect++; 280 s->init_num=0; 281 break; 282 283 case SSL3_ST_CW_CLNT_HELLO_A: 284 case SSL3_ST_CW_CLNT_HELLO_B: 285 286 s->shutdown=0; 287 ret=ssl3_client_hello(s); 288 if (ret <= 0) goto end; 289 s->state=SSL3_ST_CR_SRVR_HELLO_A; 290 s->init_num=0; 291 292 /* turn on buffering for the next lot of output */ 293 if (s->bbio != s->wbio) 294 s->wbio=BIO_push(s->bbio,s->wbio); 295 296 break; 297 298 case SSL3_ST_CR_SRVR_HELLO_A: 299 case SSL3_ST_CR_SRVR_HELLO_B: 300 ret=ssl3_get_server_hello(s); 301 if (ret <= 0) goto end; 302 303 if (s->hit) 304 { 305 s->state=SSL3_ST_CR_FINISHED_A; 306 #ifndef OPENSSL_NO_TLSEXT 307 if (s->tlsext_ticket_expected) 308 { 309 /* receive renewed session ticket */ 310 s->state=SSL3_ST_CR_SESSION_TICKET_A; 311 } 312 #endif 313 } 314 else 315 s->state=SSL3_ST_CR_CERT_A; 316 s->init_num=0; 317 break; 318 319 case SSL3_ST_CR_CERT_A: 320 case SSL3_ST_CR_CERT_B: 321 #ifndef OPENSSL_NO_TLSEXT 322 ret=ssl3_check_finished(s); 323 if (ret <= 0) goto end; 324 if (ret == 2) 325 { 326 s->hit = 1; 327 if (s->tlsext_ticket_expected) 328 s->state=SSL3_ST_CR_SESSION_TICKET_A; 329 else 330 s->state=SSL3_ST_CR_FINISHED_A; 331 s->init_num=0; 332 break; 333 } 334 #endif 335 /* Check if it is anon DH/ECDH */ 336 /* or non-RSA PSK */ 337 if (!(s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) && 338 !((s->s3->tmp.new_cipher->algorithm_auth & SSL_aPSK) && 339 !(s->s3->tmp.new_cipher->algorithm_mkey & SSL_kRSA))) 340 { 341 ret=ssl3_get_server_certificate(s); 342 if (ret <= 0) goto end; 343 #ifndef OPENSSL_NO_TLSEXT 344 if (s->tlsext_status_expected) 345 s->state=SSL3_ST_CR_CERT_STATUS_A; 346 else 347 s->state=SSL3_ST_CR_KEY_EXCH_A; 348 } 349 else 350 { 351 skip = 1; 352 s->state=SSL3_ST_CR_KEY_EXCH_A; 353 } 354 #else 355 } 356 else 357 skip=1; 358 359 s->state=SSL3_ST_CR_KEY_EXCH_A; 360 #endif 361 s->init_num=0; 362 break; 363 364 case SSL3_ST_CR_KEY_EXCH_A: 365 case SSL3_ST_CR_KEY_EXCH_B: 366 ret=ssl3_get_key_exchange(s); 367 if (ret <= 0) goto end; 368 s->state=SSL3_ST_CR_CERT_REQ_A; 369 s->init_num=0; 370 371 /* at this point we check that we have the 372 * required stuff from the server */ 373 if (!ssl3_check_cert_and_algorithm(s)) 374 { 375 ret= -1; 376 goto end; 377 } 378 break; 379 380 case SSL3_ST_CR_CERT_REQ_A: 381 case SSL3_ST_CR_CERT_REQ_B: 382 ret=ssl3_get_certificate_request(s); 383 if (ret <= 0) goto end; 384 s->state=SSL3_ST_CR_SRVR_DONE_A; 385 s->init_num=0; 386 break; 387 388 case SSL3_ST_CR_SRVR_DONE_A: 389 case SSL3_ST_CR_SRVR_DONE_B: 390 ret=ssl3_get_server_done(s); 391 if (ret <= 0) goto end; 392 #ifndef OPENSSL_NO_SRP 393 if (s->s3->tmp.new_cipher->algorithm_mkey & SSL_kSRP) 394 { 395 if ((ret = SRP_Calc_A_param(s))<=0) 396 { 397 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_SRP_A_CALC); 398 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_INTERNAL_ERROR); 399 goto end; 400 } 401 } 402 #endif 403 if (s->s3->tmp.cert_req) 404 s->state=SSL3_ST_CW_CERT_A; 405 else 406 s->state=SSL3_ST_CW_KEY_EXCH_A; 407 s->init_num=0; 408 409 break; 410 411 case SSL3_ST_CW_CERT_A: 412 case SSL3_ST_CW_CERT_B: 413 case SSL3_ST_CW_CERT_C: 414 case SSL3_ST_CW_CERT_D: 415 ret=ssl3_send_client_certificate(s); 416 if (ret <= 0) goto end; 417 s->state=SSL3_ST_CW_KEY_EXCH_A; 418 s->init_num=0; 419 break; 420 421 case SSL3_ST_CW_KEY_EXCH_A: 422 case SSL3_ST_CW_KEY_EXCH_B: 423 ret=ssl3_send_client_key_exchange(s); 424 if (ret <= 0) goto end; 425 /* EAY EAY EAY need to check for DH fix cert 426 * sent back */ 427 /* For TLS, cert_req is set to 2, so a cert chain 428 * of nothing is sent, but no verify packet is sent */ 429 /* XXX: For now, we do not support client 430 * authentication in ECDH cipher suites with 431 * ECDH (rather than ECDSA) certificates. 432 * We need to skip the certificate verify 433 * message when client's ECDH public key is sent 434 * inside the client certificate. 435 */ 436 if (s->s3->tmp.cert_req == 1) 437 { 438 s->state=SSL3_ST_CW_CERT_VRFY_A; 439 } 440 else 441 { 442 s->state=SSL3_ST_CW_CHANGE_A; 443 s->s3->change_cipher_spec=0; 444 } 445 if (s->s3->flags & TLS1_FLAGS_SKIP_CERT_VERIFY) 446 { 447 s->state=SSL3_ST_CW_CHANGE_A; 448 s->s3->change_cipher_spec=0; 449 } 450 451 s->init_num=0; 452 break; 453 454 case SSL3_ST_CW_CERT_VRFY_A: 455 case SSL3_ST_CW_CERT_VRFY_B: 456 ret=ssl3_send_client_verify(s); 457 if (ret <= 0) goto end; 458 s->state=SSL3_ST_CW_CHANGE_A; 459 s->init_num=0; 460 s->s3->change_cipher_spec=0; 461 break; 462 463 case SSL3_ST_CW_CHANGE_A: 464 case SSL3_ST_CW_CHANGE_B: 465 ret=ssl3_send_change_cipher_spec(s, 466 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); 467 if (ret <= 0) goto end; 468 469 s->state=SSL3_ST_CW_FINISHED_A; 470 #if !defined(OPENSSL_NO_TLSEXT) 471 if (s->s3->tlsext_channel_id_valid) 472 s->state=SSL3_ST_CW_CHANNEL_ID_A; 473 # if !defined(OPENSSL_NO_NEXTPROTONEG) 474 if (s->s3->next_proto_neg_seen) 475 s->state=SSL3_ST_CW_NEXT_PROTO_A; 476 # endif 477 #endif 478 s->init_num=0; 479 480 s->session->cipher=s->s3->tmp.new_cipher; 481 #ifdef OPENSSL_NO_COMP 482 s->session->compress_meth=0; 483 #else 484 if (s->s3->tmp.new_compression == NULL) 485 s->session->compress_meth=0; 486 else 487 s->session->compress_meth= 488 s->s3->tmp.new_compression->id; 489 #endif 490 if (!s->method->ssl3_enc->setup_key_block(s)) 491 { 492 ret= -1; 493 goto end; 494 } 495 496 if (!s->method->ssl3_enc->change_cipher_state(s, 497 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 498 { 499 ret= -1; 500 goto end; 501 } 502 503 break; 504 505 #if !defined(OPENSSL_NO_TLSEXT) && !defined(OPENSSL_NO_NEXTPROTONEG) 506 case SSL3_ST_CW_NEXT_PROTO_A: 507 case SSL3_ST_CW_NEXT_PROTO_B: 508 ret=ssl3_send_next_proto(s); 509 if (ret <= 0) goto end; 510 if (s->s3->tlsext_channel_id_valid) 511 s->state=SSL3_ST_CW_CHANNEL_ID_A; 512 else 513 s->state=SSL3_ST_CW_FINISHED_A; 514 break; 515 #endif 516 517 #if !defined(OPENSSL_NO_TLSEXT) 518 case SSL3_ST_CW_CHANNEL_ID_A: 519 case SSL3_ST_CW_CHANNEL_ID_B: 520 ret=ssl3_send_channel_id(s); 521 if (ret <= 0) goto end; 522 s->state=SSL3_ST_CW_FINISHED_A; 523 break; 524 #endif 525 526 case SSL3_ST_CW_FINISHED_A: 527 case SSL3_ST_CW_FINISHED_B: 528 ret=ssl3_send_finished(s, 529 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, 530 s->method->ssl3_enc->client_finished_label, 531 s->method->ssl3_enc->client_finished_label_len); 532 if (ret <= 0) goto end; 533 s->state=SSL3_ST_CW_FLUSH; 534 535 /* clear flags */ 536 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; 537 if (s->hit) 538 { 539 s->s3->tmp.next_state=SSL_ST_OK; 540 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 541 { 542 s->state=SSL_ST_OK; 543 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 544 s->s3->delay_buf_pop_ret=0; 545 } 546 } 547 else 548 { 549 /* This is a non-resumption handshake. If it 550 * involves ChannelID, then record the 551 * handshake hashes at this point in the 552 * session so that any resumption of this 553 * session with ChannelID can sign those 554 * hashes. */ 555 if (s->s3->tlsext_channel_id_new) 556 { 557 ret = tls1_record_handshake_hashes_for_channel_id(s); 558 if (ret <= 0) 559 goto end; 560 } 561 if ((SSL_get_mode(s) & SSL_MODE_HANDSHAKE_CUTTHROUGH) 562 && ssl3_can_cutthrough(s) 563 && s->s3->previous_server_finished_len == 0 /* no cutthrough on renegotiation (would complicate the state machine) */ 564 ) 565 { 566 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 567 { 568 s->state=SSL3_ST_CUTTHROUGH_COMPLETE; 569 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 570 s->s3->delay_buf_pop_ret=0; 571 } 572 else 573 { 574 s->s3->tmp.next_state=SSL3_ST_CUTTHROUGH_COMPLETE; 575 } 576 } 577 else 578 { 579 #ifndef OPENSSL_NO_TLSEXT 580 /* Allow NewSessionTicket if ticket expected */ 581 if (s->tlsext_ticket_expected) 582 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; 583 else 584 #endif 585 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; 586 } 587 } 588 s->init_num=0; 589 break; 590 591 #ifndef OPENSSL_NO_TLSEXT 592 case SSL3_ST_CR_SESSION_TICKET_A: 593 case SSL3_ST_CR_SESSION_TICKET_B: 594 ret=ssl3_get_new_session_ticket(s); 595 if (ret <= 0) goto end; 596 s->state=SSL3_ST_CR_FINISHED_A; 597 s->init_num=0; 598 break; 599 600 case SSL3_ST_CR_CERT_STATUS_A: 601 case SSL3_ST_CR_CERT_STATUS_B: 602 ret=ssl3_get_cert_status(s); 603 if (ret <= 0) goto end; 604 s->state=SSL3_ST_CR_KEY_EXCH_A; 605 s->init_num=0; 606 break; 607 #endif 608 609 case SSL3_ST_CR_FINISHED_A: 610 case SSL3_ST_CR_FINISHED_B: 611 612 s->s3->flags |= SSL3_FLAGS_CCS_OK; 613 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, 614 SSL3_ST_CR_FINISHED_B); 615 if (ret <= 0) goto end; 616 617 if (s->hit) 618 s->state=SSL3_ST_CW_CHANGE_A; 619 else 620 s->state=SSL_ST_OK; 621 s->init_num=0; 622 break; 623 624 case SSL3_ST_CW_FLUSH: 625 s->rwstate=SSL_WRITING; 626 if (BIO_flush(s->wbio) <= 0) 627 { 628 ret= -1; 629 goto end; 630 } 631 s->rwstate=SSL_NOTHING; 632 s->state=s->s3->tmp.next_state; 633 break; 634 635 case SSL3_ST_CUTTHROUGH_COMPLETE: 636 #ifndef OPENSSL_NO_TLSEXT 637 /* Allow NewSessionTicket if ticket expected */ 638 if (s->tlsext_ticket_expected) 639 s->state=SSL3_ST_CR_SESSION_TICKET_A; 640 else 641 #endif 642 s->state=SSL3_ST_CR_FINISHED_A; 643 644 /* SSL_write() will take care of flushing buffered data if 645 * DELAY_CLIENT_FINISHED is set. 646 */ 647 if (!(s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)) 648 ssl_free_wbio_buffer(s); 649 ret = 1; 650 goto end; 651 /* break; */ 652 653 case SSL_ST_OK: 654 /* clean a few things up */ 655 ssl3_cleanup_key_block(s); 656 657 if (s->init_buf != NULL) 658 { 659 BUF_MEM_free(s->init_buf); 660 s->init_buf=NULL; 661 } 662 663 /* If we are not 'joining' the last two packets, 664 * remove the buffering now */ 665 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 666 ssl_free_wbio_buffer(s); 667 /* else do it later in ssl3_write */ 668 669 s->init_num=0; 670 s->renegotiate=0; 671 s->new_session=0; 672 673 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 674 if (s->hit) s->ctx->stats.sess_hit++; 675 676 ret=1; 677 /* s->server=0; */ 678 s->handshake_func=ssl3_connect; 679 s->ctx->stats.sess_connect_good++; 680 681 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 682 683 goto end; 684 /* break; */ 685 686 default: 687 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); 688 ret= -1; 689 goto end; 690 /* break; */ 691 } 692 693 /* did we do anything */ 694 if (!s->s3->tmp.reuse_message && !skip) 695 { 696 if (s->debug) 697 { 698 if ((ret=BIO_flush(s->wbio)) <= 0) 699 goto end; 700 } 701 702 if ((cb != NULL) && (s->state != state)) 703 { 704 new_state=s->state; 705 s->state=state; 706 cb(s,SSL_CB_CONNECT_LOOP,1); 707 s->state=new_state; 708 } 709 } 710 skip=0; 711 } 712 end: 713 s->in_handshake--; 714 if (buf != NULL) 715 BUF_MEM_free(buf); 716 if (cb != NULL) 717 cb(s,SSL_CB_CONNECT_EXIT,ret); 718 return(ret); 719 } 720 721 722 int ssl3_client_hello(SSL *s) 723 { 724 unsigned char *buf; 725 unsigned char *p,*d; 726 int i; 727 unsigned long l; 728 #ifndef OPENSSL_NO_COMP 729 int j; 730 SSL_COMP *comp; 731 #endif 732 733 buf=(unsigned char *)s->init_buf->data; 734 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) 735 { 736 SSL_SESSION *sess = s->session; 737 if ((sess == NULL) || 738 (sess->ssl_version != s->version) || 739 #ifdef OPENSSL_NO_TLSEXT 740 !sess->session_id_length || 741 #else 742 (!sess->session_id_length && !sess->tlsext_tick) || 743 #endif 744 (sess->not_resumable)) 745 { 746 if (!s->session_creation_enabled) 747 { 748 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 749 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_SESSION_MAY_NOT_BE_CREATED); 750 goto err; 751 } 752 if (!ssl_get_new_session(s,0)) 753 goto err; 754 } 755 /* else use the pre-loaded session */ 756 757 p=s->s3->client_random; 758 759 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0) 760 goto err; 761 762 /* Do the message type and length last */ 763 d=p= &(buf[4]); 764 765 /* version indicates the negotiated version: for example from 766 * an SSLv2/v3 compatible client hello). The client_version 767 * field is the maximum version we permit and it is also 768 * used in RSA encrypted premaster secrets. Some servers can 769 * choke if we initially report a higher version then 770 * renegotiate to a lower one in the premaster secret. This 771 * didn't happen with TLS 1.0 as most servers supported it 772 * but it can with TLS 1.1 or later if the server only supports 773 * 1.0. 774 * 775 * Possible scenario with previous logic: 776 * 1. Client hello indicates TLS 1.2 777 * 2. Server hello says TLS 1.0 778 * 3. RSA encrypted premaster secret uses 1.2. 779 * 4. Handhaked proceeds using TLS 1.0. 780 * 5. Server sends hello request to renegotiate. 781 * 6. Client hello indicates TLS v1.0 as we now 782 * know that is maximum server supports. 783 * 7. Server chokes on RSA encrypted premaster secret 784 * containing version 1.0. 785 * 786 * For interoperability it should be OK to always use the 787 * maximum version we support in client hello and then rely 788 * on the checking of version to ensure the servers isn't 789 * being inconsistent: for example initially negotiating with 790 * TLS 1.0 and renegotiating with TLS 1.2. We do this by using 791 * client_version in client hello and not resetting it to 792 * the negotiated version. 793 */ 794 #if 0 795 *(p++)=s->version>>8; 796 *(p++)=s->version&0xff; 797 s->client_version=s->version; 798 #else 799 *(p++)=s->client_version>>8; 800 *(p++)=s->client_version&0xff; 801 #endif 802 803 /* Random stuff */ 804 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 805 p+=SSL3_RANDOM_SIZE; 806 807 /* Session ID */ 808 if (s->new_session) 809 i=0; 810 else 811 i=s->session->session_id_length; 812 *(p++)=i; 813 if (i != 0) 814 { 815 if (i > (int)sizeof(s->session->session_id)) 816 { 817 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 818 goto err; 819 } 820 memcpy(p,s->session->session_id,i); 821 p+=i; 822 } 823 824 /* Ciphers supported */ 825 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); 826 if (i == 0) 827 { 828 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 829 goto err; 830 } 831 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH 832 /* Some servers hang if client hello > 256 bytes 833 * as hack workaround chop number of supported ciphers 834 * to keep it well below this if we use TLS v1.2 835 */ 836 if (TLS1_get_version(s) >= TLS1_2_VERSION 837 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH) 838 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1; 839 #endif 840 s2n(i,p); 841 p+=i; 842 843 /* COMPRESSION */ 844 #ifdef OPENSSL_NO_COMP 845 *(p++)=1; 846 #else 847 848 if ((s->options & SSL_OP_NO_COMPRESSION) 849 || !s->ctx->comp_methods) 850 j=0; 851 else 852 j=sk_SSL_COMP_num(s->ctx->comp_methods); 853 *(p++)=1+j; 854 for (i=0; i<j; i++) 855 { 856 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 857 *(p++)=comp->id; 858 } 859 #endif 860 *(p++)=0; /* Add the NULL method */ 861 862 #ifndef OPENSSL_NO_TLSEXT 863 /* TLS extensions*/ 864 if (ssl_prepare_clienthello_tlsext(s) <= 0) 865 { 866 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT); 867 goto err; 868 } 869 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) 870 { 871 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); 872 goto err; 873 } 874 #endif 875 876 l=(p-d); 877 d=buf; 878 *(d++)=SSL3_MT_CLIENT_HELLO; 879 l2n3(l,d); 880 881 s->state=SSL3_ST_CW_CLNT_HELLO_B; 882 /* number of bytes to write */ 883 s->init_num=p-buf; 884 s->init_off=0; 885 } 886 887 /* SSL3_ST_CW_CLNT_HELLO_B */ 888 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 889 err: 890 return(-1); 891 } 892 893 int ssl3_get_server_hello(SSL *s) 894 { 895 STACK_OF(SSL_CIPHER) *sk; 896 const SSL_CIPHER *c; 897 unsigned char *p,*d; 898 int i,al,ok; 899 unsigned int j; 900 long n; 901 #ifndef OPENSSL_NO_COMP 902 SSL_COMP *comp; 903 #endif 904 905 n=s->method->ssl_get_message(s, 906 SSL3_ST_CR_SRVR_HELLO_A, 907 SSL3_ST_CR_SRVR_HELLO_B, 908 -1, 909 20000, /* ?? */ 910 &ok); 911 912 if (!ok) return((int)n); 913 914 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 915 { 916 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) 917 { 918 if ( s->d1->send_cookie == 0) 919 { 920 s->s3->tmp.reuse_message = 1; 921 return 1; 922 } 923 else /* already sent a cookie */ 924 { 925 al=SSL_AD_UNEXPECTED_MESSAGE; 926 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 927 goto f_err; 928 } 929 } 930 } 931 932 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) 933 { 934 al=SSL_AD_UNEXPECTED_MESSAGE; 935 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 936 goto f_err; 937 } 938 939 d=p=(unsigned char *)s->init_msg; 940 941 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 942 { 943 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 944 s->version=(s->version&0xff00)|p[1]; 945 al=SSL_AD_PROTOCOL_VERSION; 946 goto f_err; 947 } 948 p+=2; 949 950 /* load the server hello data */ 951 /* load the server random */ 952 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 953 p+=SSL3_RANDOM_SIZE; 954 955 /* get the session-id */ 956 j= *(p++); 957 958 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 959 { 960 al=SSL_AD_ILLEGAL_PARAMETER; 961 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 962 goto f_err; 963 } 964 965 #ifndef OPENSSL_NO_TLSEXT 966 /* check if we want to resume the session based on external pre-shared secret */ 967 if (s->version >= TLS1_VERSION && s->tls_session_secret_cb) 968 { 969 SSL_CIPHER *pref_cipher=NULL; 970 s->session->master_key_length=sizeof(s->session->master_key); 971 if (s->tls_session_secret_cb(s, s->session->master_key, 972 &s->session->master_key_length, 973 NULL, &pref_cipher, 974 s->tls_session_secret_cb_arg)) 975 { 976 s->session->cipher = pref_cipher ? 977 pref_cipher : ssl_get_cipher_by_char(s, p+j); 978 } 979 } 980 #endif /* OPENSSL_NO_TLSEXT */ 981 982 if (j != 0 && j == s->session->session_id_length 983 && memcmp(p,s->session->session_id,j) == 0) 984 { 985 if(s->sid_ctx_length != s->session->sid_ctx_length 986 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 987 { 988 /* actually a client application bug */ 989 al=SSL_AD_ILLEGAL_PARAMETER; 990 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 991 goto f_err; 992 } 993 s->s3->flags |= SSL3_FLAGS_CCS_OK; 994 s->hit=1; 995 } 996 else /* a miss or crap from the other end */ 997 { 998 /* If we were trying for session-id reuse, make a new 999 * SSL_SESSION so we don't stuff up other people */ 1000 s->hit=0; 1001 if (s->session->session_id_length > 0) 1002 { 1003 if (!s->session_creation_enabled) 1004 { 1005 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 1006 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SESSION_MAY_NOT_BE_CREATED); 1007 goto err; 1008 } 1009 if (!ssl_get_new_session(s,0)) 1010 { 1011 al=SSL_AD_INTERNAL_ERROR; 1012 goto f_err; 1013 } 1014 } 1015 s->session->session_id_length=j; 1016 memcpy(s->session->session_id,p,j); /* j could be 0 */ 1017 } 1018 p+=j; 1019 c=ssl_get_cipher_by_char(s,p); 1020 if (c == NULL) 1021 { 1022 /* unknown cipher */ 1023 al=SSL_AD_ILLEGAL_PARAMETER; 1024 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 1025 goto f_err; 1026 } 1027 /* TLS v1.2 only ciphersuites require v1.2 or later */ 1028 if ((c->algorithm_ssl & SSL_TLSV1_2) && 1029 (TLS1_get_version(s) < TLS1_2_VERSION)) 1030 { 1031 al=SSL_AD_ILLEGAL_PARAMETER; 1032 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 1033 goto f_err; 1034 } 1035 p+=ssl_put_cipher_by_char(s,NULL,NULL); 1036 1037 sk=ssl_get_ciphers_by_id(s); 1038 i=sk_SSL_CIPHER_find(sk,c); 1039 if (i < 0) 1040 { 1041 /* we did not say we would use this cipher */ 1042 al=SSL_AD_ILLEGAL_PARAMETER; 1043 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 1044 goto f_err; 1045 } 1046 1047 /* Depending on the session caching (internal/external), the cipher 1048 and/or cipher_id values may not be set. Make sure that 1049 cipher_id is set and use it for comparison. */ 1050 if (s->session->cipher) 1051 s->session->cipher_id = s->session->cipher->id; 1052 if (s->hit && (s->session->cipher_id != c->id)) 1053 { 1054 /* Workaround is now obsolete */ 1055 #if 0 1056 if (!(s->options & 1057 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 1058 #endif 1059 { 1060 al=SSL_AD_ILLEGAL_PARAMETER; 1061 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 1062 goto f_err; 1063 } 1064 } 1065 s->s3->tmp.new_cipher=c; 1066 /* Don't digest cached records if TLS v1.2: we may need them for 1067 * client authentication. 1068 */ 1069 if (TLS1_get_version(s) < TLS1_2_VERSION && !ssl3_digest_cached_records(s)) 1070 { 1071 al = SSL_AD_INTERNAL_ERROR; 1072 goto f_err; 1073 } 1074 /* lets get the compression algorithm */ 1075 /* COMPRESSION */ 1076 #ifdef OPENSSL_NO_COMP 1077 if (*(p++) != 0) 1078 { 1079 al=SSL_AD_ILLEGAL_PARAMETER; 1080 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1081 goto f_err; 1082 } 1083 /* If compression is disabled we'd better not try to resume a session 1084 * using compression. 1085 */ 1086 if (s->session->compress_meth != 0) 1087 { 1088 al=SSL_AD_INTERNAL_ERROR; 1089 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_INCONSISTENT_COMPRESSION); 1090 goto f_err; 1091 } 1092 #else 1093 j= *(p++); 1094 if (s->hit && j != s->session->compress_meth) 1095 { 1096 al=SSL_AD_ILLEGAL_PARAMETER; 1097 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_COMPRESSION_ALGORITHM_NOT_RETURNED); 1098 goto f_err; 1099 } 1100 if (j == 0) 1101 comp=NULL; 1102 else if (s->options & SSL_OP_NO_COMPRESSION) 1103 { 1104 al=SSL_AD_ILLEGAL_PARAMETER; 1105 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_COMPRESSION_DISABLED); 1106 goto f_err; 1107 } 1108 else 1109 comp=ssl3_comp_find(s->ctx->comp_methods,j); 1110 1111 if ((j != 0) && (comp == NULL)) 1112 { 1113 al=SSL_AD_ILLEGAL_PARAMETER; 1114 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 1115 goto f_err; 1116 } 1117 else 1118 { 1119 s->s3->tmp.new_compression=comp; 1120 } 1121 #endif 1122 1123 #ifndef OPENSSL_NO_TLSEXT 1124 /* TLS extensions*/ 1125 if (s->version >= SSL3_VERSION) 1126 { 1127 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al)) 1128 { 1129 /* 'al' set by ssl_parse_serverhello_tlsext */ 1130 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT); 1131 goto f_err; 1132 } 1133 if (ssl_check_serverhello_tlsext(s) <= 0) 1134 { 1135 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); 1136 goto err; 1137 } 1138 } 1139 #endif 1140 1141 if (p != (d+n)) 1142 { 1143 /* wrong packet length */ 1144 al=SSL_AD_DECODE_ERROR; 1145 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 1146 goto f_err; 1147 } 1148 1149 return(1); 1150 f_err: 1151 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1152 err: 1153 return(-1); 1154 } 1155 1156 int ssl3_get_server_certificate(SSL *s) 1157 { 1158 int al,i,ok,ret= -1; 1159 unsigned long n,nc,llen,l; 1160 X509 *x=NULL; 1161 const unsigned char *q,*p; 1162 unsigned char *d; 1163 STACK_OF(X509) *sk=NULL; 1164 SESS_CERT *sc; 1165 EVP_PKEY *pkey=NULL; 1166 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 1167 1168 n=s->method->ssl_get_message(s, 1169 SSL3_ST_CR_CERT_A, 1170 SSL3_ST_CR_CERT_B, 1171 -1, 1172 s->max_cert_list, 1173 &ok); 1174 1175 if (!ok) return((int)n); 1176 1177 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 1178 ((s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5) && 1179 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) 1180 { 1181 s->s3->tmp.reuse_message=1; 1182 return(1); 1183 } 1184 1185 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 1186 { 1187 al=SSL_AD_UNEXPECTED_MESSAGE; 1188 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 1189 goto f_err; 1190 } 1191 p=d=(unsigned char *)s->init_msg; 1192 1193 if ((sk=sk_X509_new_null()) == NULL) 1194 { 1195 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1196 goto err; 1197 } 1198 1199 n2l3(p,llen); 1200 if (llen+3 != n) 1201 { 1202 al=SSL_AD_DECODE_ERROR; 1203 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 1204 goto f_err; 1205 } 1206 for (nc=0; nc<llen; ) 1207 { 1208 n2l3(p,l); 1209 if ((l+nc+3) > llen) 1210 { 1211 al=SSL_AD_DECODE_ERROR; 1212 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1213 goto f_err; 1214 } 1215 1216 q=p; 1217 x=d2i_X509(NULL,&q,l); 1218 if (x == NULL) 1219 { 1220 al=SSL_AD_BAD_CERTIFICATE; 1221 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 1222 goto f_err; 1223 } 1224 if (q != (p+l)) 1225 { 1226 al=SSL_AD_DECODE_ERROR; 1227 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1228 goto f_err; 1229 } 1230 if (!sk_X509_push(sk,x)) 1231 { 1232 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1233 goto err; 1234 } 1235 x=NULL; 1236 nc+=l+3; 1237 p=q; 1238 } 1239 1240 i=ssl_verify_cert_chain(s,sk); 1241 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 1242 #ifndef OPENSSL_NO_KRB5 1243 && !((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1244 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1245 #endif /* OPENSSL_NO_KRB5 */ 1246 ) 1247 { 1248 al=ssl_verify_alarm_type(s->verify_result); 1249 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 1250 goto f_err; 1251 } 1252 ERR_clear_error(); /* but we keep s->verify_result */ 1253 1254 sc=ssl_sess_cert_new(); 1255 if (sc == NULL) goto err; 1256 1257 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 1258 s->session->sess_cert=sc; 1259 1260 sc->cert_chain=sk; 1261 /* Inconsistency alert: cert_chain does include the peer's 1262 * certificate, which we don't include in s3_srvr.c */ 1263 x=sk_X509_value(sk,0); 1264 sk=NULL; 1265 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 1266 1267 pkey=X509_get_pubkey(x); 1268 1269 /* VRS: allow null cert if auth == KRB5 */ 1270 need_cert = ((s->s3->tmp.new_cipher->algorithm_mkey & SSL_kKRB5) && 1271 (s->s3->tmp.new_cipher->algorithm_auth & SSL_aKRB5)) 1272 ? 0 : 1; 1273 1274 #ifdef KSSL_DEBUG 1275 printf("pkey,x = %p, %p\n", pkey,x); 1276 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 1277 printf("cipher, alg, nc = %s, %lx, %lx, %d\n", s->s3->tmp.new_cipher->name, 1278 s->s3->tmp.new_cipher->algorithm_mkey, s->s3->tmp.new_cipher->algorithm_auth, need_cert); 1279 #endif /* KSSL_DEBUG */ 1280 1281 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 1282 { 1283 x=NULL; 1284 al=SSL3_AL_FATAL; 1285 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1286 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1287 goto f_err; 1288 } 1289 1290 i=ssl_cert_type(x,pkey); 1291 if (need_cert && i < 0) 1292 { 1293 x=NULL; 1294 al=SSL3_AL_FATAL; 1295 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1296 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1297 goto f_err; 1298 } 1299 1300 if (need_cert) 1301 { 1302 sc->peer_cert_type=i; 1303 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1304 /* Why would the following ever happen? 1305 * We just created sc a couple of lines ago. */ 1306 if (sc->peer_pkeys[i].x509 != NULL) 1307 X509_free(sc->peer_pkeys[i].x509); 1308 sc->peer_pkeys[i].x509=x; 1309 sc->peer_key= &(sc->peer_pkeys[i]); 1310 1311 if (s->session->peer != NULL) 1312 X509_free(s->session->peer); 1313 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1314 s->session->peer=x; 1315 } 1316 else 1317 { 1318 sc->peer_cert_type=i; 1319 sc->peer_key= NULL; 1320 1321 if (s->session->peer != NULL) 1322 X509_free(s->session->peer); 1323 s->session->peer=NULL; 1324 } 1325 s->session->verify_result = s->verify_result; 1326 1327 x=NULL; 1328 ret=1; 1329 1330 if (0) 1331 { 1332 f_err: 1333 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1334 } 1335 err: 1336 EVP_PKEY_free(pkey); 1337 X509_free(x); 1338 sk_X509_pop_free(sk,X509_free); 1339 return(ret); 1340 } 1341 1342 int ssl3_get_key_exchange(SSL *s) 1343 { 1344 #ifndef OPENSSL_NO_RSA 1345 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 1346 #endif 1347 EVP_MD_CTX md_ctx; 1348 unsigned char *param,*p; 1349 int al,i,j,param_len,ok; 1350 long n,alg_k,alg_a; 1351 EVP_PKEY *pkey=NULL; 1352 const EVP_MD *md = NULL; 1353 #ifndef OPENSSL_NO_RSA 1354 RSA *rsa=NULL; 1355 #endif 1356 #ifndef OPENSSL_NO_DH 1357 DH *dh=NULL; 1358 #endif 1359 #ifndef OPENSSL_NO_ECDH 1360 EC_KEY *ecdh = NULL; 1361 BN_CTX *bn_ctx = NULL; 1362 EC_POINT *srvr_ecpoint = NULL; 1363 int curve_nid = 0; 1364 int encoded_pt_len = 0; 1365 #endif 1366 1367 /* use same message size as in ssl3_get_certificate_request() 1368 * as ServerKeyExchange message may be skipped */ 1369 n=s->method->ssl_get_message(s, 1370 SSL3_ST_CR_KEY_EXCH_A, 1371 SSL3_ST_CR_KEY_EXCH_B, 1372 -1, 1373 s->max_cert_list, 1374 &ok); 1375 if (!ok) return((int)n); 1376 1377 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 1378 { 1379 #ifndef OPENSSL_NO_PSK 1380 /* In plain PSK ciphersuite, ServerKeyExchange can be 1381 omitted if no identity hint is sent. Set 1382 session->sess_cert anyway to avoid problems 1383 later.*/ 1384 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aPSK) 1385 { 1386 s->session->sess_cert=ssl_sess_cert_new(); 1387 if (s->session->psk_identity_hint) 1388 { 1389 OPENSSL_free(s->session->psk_identity_hint); 1390 s->session->psk_identity_hint = NULL; 1391 } 1392 } 1393 #endif 1394 s->s3->tmp.reuse_message=1; 1395 return(1); 1396 } 1397 1398 param=p=(unsigned char *)s->init_msg; 1399 if (s->session->sess_cert != NULL) 1400 { 1401 #ifndef OPENSSL_NO_RSA 1402 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1403 { 1404 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1405 s->session->sess_cert->peer_rsa_tmp=NULL; 1406 } 1407 #endif 1408 #ifndef OPENSSL_NO_DH 1409 if (s->session->sess_cert->peer_dh_tmp) 1410 { 1411 DH_free(s->session->sess_cert->peer_dh_tmp); 1412 s->session->sess_cert->peer_dh_tmp=NULL; 1413 } 1414 #endif 1415 #ifndef OPENSSL_NO_ECDH 1416 if (s->session->sess_cert->peer_ecdh_tmp) 1417 { 1418 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1419 s->session->sess_cert->peer_ecdh_tmp=NULL; 1420 } 1421 #endif 1422 } 1423 else 1424 { 1425 s->session->sess_cert=ssl_sess_cert_new(); 1426 } 1427 1428 param_len=0; 1429 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 1430 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 1431 EVP_MD_CTX_init(&md_ctx); 1432 1433 #ifndef OPENSSL_NO_PSK 1434 if (alg_a & SSL_aPSK) 1435 { 1436 char tmp_id_hint[PSK_MAX_IDENTITY_LEN+1]; 1437 1438 al=SSL_AD_HANDSHAKE_FAILURE; 1439 n2s(p,i); 1440 param_len=i+2; 1441 if (s->session->psk_identity_hint) 1442 { 1443 OPENSSL_free(s->session->psk_identity_hint); 1444 s->session->psk_identity_hint = NULL; 1445 } 1446 if (i != 0) 1447 { 1448 /* Store PSK identity hint for later use, hint is used 1449 * in ssl3_send_client_key_exchange. Assume that the 1450 * maximum length of a PSK identity hint can be as 1451 * long as the maximum length of a PSK identity. */ 1452 if (i > PSK_MAX_IDENTITY_LEN) 1453 { 1454 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1455 SSL_R_DATA_LENGTH_TOO_LONG); 1456 goto f_err; 1457 } 1458 if (param_len > n) 1459 { 1460 al=SSL_AD_DECODE_ERROR; 1461 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, 1462 SSL_R_BAD_PSK_IDENTITY_HINT_LENGTH); 1463 goto f_err; 1464 } 1465 /* If received PSK identity hint contains NULL 1466 * characters, the hint is truncated from the first 1467 * NULL. p may not be ending with NULL, so create a 1468 * NULL-terminated string. */ 1469 memcpy(tmp_id_hint, p, i); 1470 memset(tmp_id_hint+i, 0, PSK_MAX_IDENTITY_LEN+1-i); 1471 s->session->psk_identity_hint = BUF_strdup(tmp_id_hint); 1472 if (s->session->psk_identity_hint == NULL) 1473 { 1474 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE, ERR_R_MALLOC_FAILURE); 1475 goto f_err; 1476 } 1477 } 1478 p+=i; 1479 n-=param_len; 1480 } 1481 #endif /* !OPENSSL_NO_PSK */ 1482 1483 if (0) {} 1484 #ifndef OPENSSL_NO_SRP 1485 else if (alg_k & SSL_kSRP) 1486 { 1487 n2s(p,i); 1488 param_len=i+2; 1489 if (param_len > n) 1490 { 1491 al=SSL_AD_DECODE_ERROR; 1492 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_N_LENGTH); 1493 goto f_err; 1494 } 1495 if (!(s->srp_ctx.N=BN_bin2bn(p,i,NULL))) 1496 { 1497 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1498 goto err; 1499 } 1500 p+=i; 1501 1502 n2s(p,i); 1503 param_len+=i+2; 1504 if (param_len > n) 1505 { 1506 al=SSL_AD_DECODE_ERROR; 1507 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_G_LENGTH); 1508 goto f_err; 1509 } 1510 if (!(s->srp_ctx.g=BN_bin2bn(p,i,NULL))) 1511 { 1512 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1513 goto err; 1514 } 1515 p+=i; 1516 1517 i = (unsigned int)(p[0]); 1518 p++; 1519 param_len+=i+1; 1520 if (param_len > n) 1521 { 1522 al=SSL_AD_DECODE_ERROR; 1523 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_S_LENGTH); 1524 goto f_err; 1525 } 1526 if (!(s->srp_ctx.s=BN_bin2bn(p,i,NULL))) 1527 { 1528 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1529 goto err; 1530 } 1531 p+=i; 1532 1533 n2s(p,i); 1534 param_len+=i+2; 1535 if (param_len > n) 1536 { 1537 al=SSL_AD_DECODE_ERROR; 1538 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SRP_B_LENGTH); 1539 goto f_err; 1540 } 1541 if (!(s->srp_ctx.B=BN_bin2bn(p,i,NULL))) 1542 { 1543 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1544 goto err; 1545 } 1546 p+=i; 1547 n-=param_len; 1548 1549 /* We must check if there is a certificate */ 1550 #ifndef OPENSSL_NO_RSA 1551 if (alg_a & SSL_aRSA) 1552 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1553 #else 1554 if (0) 1555 ; 1556 #endif 1557 #ifndef OPENSSL_NO_DSA 1558 else if (alg_a & SSL_aDSS) 1559 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1560 #endif 1561 } 1562 #endif /* !OPENSSL_NO_SRP */ 1563 #ifndef OPENSSL_NO_RSA 1564 else if (alg_k & SSL_kRSA) 1565 { 1566 if ((rsa=RSA_new()) == NULL) 1567 { 1568 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1569 goto err; 1570 } 1571 n2s(p,i); 1572 param_len=i+2; 1573 if (param_len > n) 1574 { 1575 al=SSL_AD_DECODE_ERROR; 1576 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1577 goto f_err; 1578 } 1579 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1580 { 1581 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1582 goto err; 1583 } 1584 p+=i; 1585 1586 n2s(p,i); 1587 param_len+=i+2; 1588 if (param_len > n) 1589 { 1590 al=SSL_AD_DECODE_ERROR; 1591 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1592 goto f_err; 1593 } 1594 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1595 { 1596 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1597 goto err; 1598 } 1599 p+=i; 1600 n-=param_len; 1601 1602 /* this should be because we are using an export cipher */ 1603 if (alg_a & SSL_aRSA) 1604 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1605 else 1606 { 1607 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1608 goto err; 1609 } 1610 s->session->sess_cert->peer_rsa_tmp=rsa; 1611 rsa=NULL; 1612 } 1613 #endif 1614 #ifndef OPENSSL_NO_DH 1615 else if (alg_k & SSL_kEDH) 1616 { 1617 if ((dh=DH_new()) == NULL) 1618 { 1619 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1620 goto err; 1621 } 1622 n2s(p,i); 1623 param_len=i+2; 1624 if (param_len > n) 1625 { 1626 al=SSL_AD_DECODE_ERROR; 1627 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1628 goto f_err; 1629 } 1630 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1631 { 1632 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1633 goto err; 1634 } 1635 p+=i; 1636 1637 n2s(p,i); 1638 param_len+=i+2; 1639 if (param_len > n) 1640 { 1641 al=SSL_AD_DECODE_ERROR; 1642 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1643 goto f_err; 1644 } 1645 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1646 { 1647 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1648 goto err; 1649 } 1650 p+=i; 1651 1652 n2s(p,i); 1653 param_len+=i+2; 1654 if (param_len > n) 1655 { 1656 al=SSL_AD_DECODE_ERROR; 1657 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1658 goto f_err; 1659 } 1660 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1661 { 1662 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1663 goto err; 1664 } 1665 p+=i; 1666 n-=param_len; 1667 1668 #ifndef OPENSSL_NO_RSA 1669 if (alg_a & SSL_aRSA) 1670 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1671 #else 1672 if (0) 1673 ; 1674 #endif 1675 #ifndef OPENSSL_NO_DSA 1676 else if (alg_a & SSL_aDSS) 1677 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1678 #endif 1679 /* else anonymous DH, so no certificate or pkey. */ 1680 1681 s->session->sess_cert->peer_dh_tmp=dh; 1682 dh=NULL; 1683 } 1684 else if ((alg_k & SSL_kDHr) || (alg_k & SSL_kDHd)) 1685 { 1686 al=SSL_AD_ILLEGAL_PARAMETER; 1687 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1688 goto f_err; 1689 } 1690 #endif /* !OPENSSL_NO_DH */ 1691 1692 #ifndef OPENSSL_NO_ECDH 1693 else if (alg_k & SSL_kEECDH) 1694 { 1695 EC_GROUP *ngroup; 1696 const EC_GROUP *group; 1697 1698 if ((ecdh=EC_KEY_new()) == NULL) 1699 { 1700 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1701 goto err; 1702 } 1703 1704 /* Extract elliptic curve parameters and the 1705 * server's ephemeral ECDH public key. 1706 * Keep accumulating lengths of various components in 1707 * param_len and make sure it never exceeds n. 1708 */ 1709 1710 /* XXX: For now we only support named (not generic) curves 1711 * and the ECParameters in this case is just three bytes. 1712 */ 1713 param_len=3; 1714 if ((param_len > n) || 1715 (*p != NAMED_CURVE_TYPE) || 1716 ((curve_nid = tls1_ec_curve_id2nid(*(p + 2))) == 0)) 1717 { 1718 al=SSL_AD_INTERNAL_ERROR; 1719 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1720 goto f_err; 1721 } 1722 1723 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1724 if (ngroup == NULL) 1725 { 1726 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1727 goto err; 1728 } 1729 if (EC_KEY_set_group(ecdh, ngroup) == 0) 1730 { 1731 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1732 goto err; 1733 } 1734 EC_GROUP_free(ngroup); 1735 1736 group = EC_KEY_get0_group(ecdh); 1737 1738 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1739 (EC_GROUP_get_degree(group) > 163)) 1740 { 1741 al=SSL_AD_EXPORT_RESTRICTION; 1742 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1743 goto f_err; 1744 } 1745 1746 p+=3; 1747 1748 /* Next, get the encoded ECPoint */ 1749 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1750 ((bn_ctx = BN_CTX_new()) == NULL)) 1751 { 1752 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1753 goto err; 1754 } 1755 1756 encoded_pt_len = *p; /* length of encoded point */ 1757 p+=1; 1758 param_len += (1 + encoded_pt_len); 1759 if ((param_len > n) || 1760 (EC_POINT_oct2point(group, srvr_ecpoint, 1761 p, encoded_pt_len, bn_ctx) == 0)) 1762 { 1763 al=SSL_AD_DECODE_ERROR; 1764 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT); 1765 goto f_err; 1766 } 1767 1768 n-=param_len; 1769 p+=encoded_pt_len; 1770 1771 /* The ECC/TLS specification does not mention 1772 * the use of DSA to sign ECParameters in the server 1773 * key exchange message. We do support RSA and ECDSA. 1774 */ 1775 if (0) ; 1776 #ifndef OPENSSL_NO_RSA 1777 else if (alg_a & SSL_aRSA) 1778 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1779 #endif 1780 #ifndef OPENSSL_NO_ECDSA 1781 else if (alg_a & SSL_aECDSA) 1782 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1783 #endif 1784 /* else anonymous ECDH, so no certificate or pkey. */ 1785 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1786 s->session->sess_cert->peer_ecdh_tmp=ecdh; 1787 ecdh=NULL; 1788 BN_CTX_free(bn_ctx); 1789 bn_ctx = NULL; 1790 EC_POINT_free(srvr_ecpoint); 1791 srvr_ecpoint = NULL; 1792 } 1793 #endif /* !OPENSSL_NO_ECDH */ 1794 1795 else if (!(alg_k & SSL_kPSK)) 1796 { 1797 al=SSL_AD_UNEXPECTED_MESSAGE; 1798 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1799 goto f_err; 1800 } 1801 1802 /* p points to the next byte, there are 'n' bytes left */ 1803 1804 /* if it was signed, check the signature */ 1805 if (pkey != NULL) 1806 { 1807 if (TLS1_get_version(s) >= TLS1_2_VERSION) 1808 { 1809 int sigalg = tls12_get_sigid(pkey); 1810 /* Should never happen */ 1811 if (sigalg == -1) 1812 { 1813 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1814 goto err; 1815 } 1816 /* Check key type is consistent with signature */ 1817 if (sigalg != (int)p[1]) 1818 { 1819 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_TYPE); 1820 al=SSL_AD_DECODE_ERROR; 1821 goto f_err; 1822 } 1823 md = tls12_get_hash(p[0]); 1824 if (md == NULL) 1825 { 1826 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNKNOWN_DIGEST); 1827 al=SSL_AD_DECODE_ERROR; 1828 goto f_err; 1829 } 1830 #ifdef SSL_DEBUG 1831 fprintf(stderr, "USING TLSv1.2 HASH %s\n", EVP_MD_name(md)); 1832 #endif 1833 p += 2; 1834 n -= 2; 1835 } 1836 else 1837 md = EVP_sha1(); 1838 1839 n2s(p,i); 1840 n-=2; 1841 j=EVP_PKEY_size(pkey); 1842 1843 if ((i != n) || (n > j) || (n <= 0)) 1844 { 1845 /* wrong packet length */ 1846 al=SSL_AD_DECODE_ERROR; 1847 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1848 goto f_err; 1849 } 1850 1851 #ifndef OPENSSL_NO_RSA 1852 if (pkey->type == EVP_PKEY_RSA && TLS1_get_version(s) < TLS1_2_VERSION) 1853 { 1854 int num; 1855 1856 j=0; 1857 q=md_buf; 1858 for (num=2; num > 0; num--) 1859 { 1860 EVP_MD_CTX_set_flags(&md_ctx, 1861 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1862 EVP_DigestInit_ex(&md_ctx,(num == 2) 1863 ?s->ctx->md5:s->ctx->sha1, NULL); 1864 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1865 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1866 EVP_DigestUpdate(&md_ctx,param,param_len); 1867 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i); 1868 q+=i; 1869 j+=i; 1870 } 1871 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1872 pkey->pkey.rsa); 1873 if (i < 0) 1874 { 1875 al=SSL_AD_DECRYPT_ERROR; 1876 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1877 goto f_err; 1878 } 1879 if (i == 0) 1880 { 1881 /* bad signature */ 1882 al=SSL_AD_DECRYPT_ERROR; 1883 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1884 goto f_err; 1885 } 1886 } 1887 else 1888 #endif 1889 { 1890 EVP_VerifyInit_ex(&md_ctx, md, NULL); 1891 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1892 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1893 EVP_VerifyUpdate(&md_ctx,param,param_len); 1894 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1895 { 1896 /* bad signature */ 1897 al=SSL_AD_DECRYPT_ERROR; 1898 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1899 goto f_err; 1900 } 1901 } 1902 } 1903 else 1904 { 1905 if (!(alg_a & SSL_aNULL) && 1906 /* Among PSK ciphers only RSA_PSK needs a public key */ 1907 !((alg_a & SSL_aPSK) && !(alg_k & SSL_kRSA))) 1908 { 1909 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1910 goto err; 1911 } 1912 /* still data left over */ 1913 if (n != 0) 1914 { 1915 al=SSL_AD_DECODE_ERROR; 1916 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1917 goto f_err; 1918 } 1919 } 1920 EVP_PKEY_free(pkey); 1921 EVP_MD_CTX_cleanup(&md_ctx); 1922 return(1); 1923 f_err: 1924 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1925 err: 1926 EVP_PKEY_free(pkey); 1927 #ifndef OPENSSL_NO_RSA 1928 if (rsa != NULL) 1929 RSA_free(rsa); 1930 #endif 1931 #ifndef OPENSSL_NO_DH 1932 if (dh != NULL) 1933 DH_free(dh); 1934 #endif 1935 #ifndef OPENSSL_NO_ECDH 1936 BN_CTX_free(bn_ctx); 1937 EC_POINT_free(srvr_ecpoint); 1938 if (ecdh != NULL) 1939 EC_KEY_free(ecdh); 1940 #endif 1941 EVP_MD_CTX_cleanup(&md_ctx); 1942 return(-1); 1943 } 1944 1945 int ssl3_get_certificate_request(SSL *s) 1946 { 1947 int ok,ret=0; 1948 unsigned long n,nc,l; 1949 unsigned int llen, ctype_num,i; 1950 X509_NAME *xn=NULL; 1951 const unsigned char *p,*q; 1952 unsigned char *d; 1953 STACK_OF(X509_NAME) *ca_sk=NULL; 1954 1955 n=s->method->ssl_get_message(s, 1956 SSL3_ST_CR_CERT_REQ_A, 1957 SSL3_ST_CR_CERT_REQ_B, 1958 -1, 1959 s->max_cert_list, 1960 &ok); 1961 1962 if (!ok) return((int)n); 1963 1964 s->s3->tmp.cert_req=0; 1965 1966 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 1967 { 1968 s->s3->tmp.reuse_message=1; 1969 /* If we get here we don't need any cached handshake records 1970 * as we wont be doing client auth. 1971 */ 1972 if (s->s3->handshake_buffer) 1973 { 1974 if (!ssl3_digest_cached_records(s)) 1975 goto err; 1976 } 1977 return(1); 1978 } 1979 1980 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 1981 { 1982 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1983 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 1984 goto err; 1985 } 1986 1987 /* TLS does not like anon-DH with client cert */ 1988 if (s->version > SSL3_VERSION) 1989 { 1990 if (s->s3->tmp.new_cipher->algorithm_auth & SSL_aNULL) 1991 { 1992 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1993 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1994 goto err; 1995 } 1996 } 1997 1998 p=d=(unsigned char *)s->init_msg; 1999 2000 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 2001 { 2002 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 2003 goto err; 2004 } 2005 2006 /* get the certificate types */ 2007 ctype_num= *(p++); 2008 if (ctype_num > SSL3_CT_NUMBER) 2009 ctype_num=SSL3_CT_NUMBER; 2010 for (i=0; i<ctype_num; i++) 2011 s->s3->tmp.ctype[i]= p[i]; 2012 p+=ctype_num; 2013 if (TLS1_get_version(s) >= TLS1_2_VERSION) 2014 { 2015 n2s(p, llen); 2016 /* Check we have enough room for signature algorithms and 2017 * following length value. 2018 */ 2019 if ((unsigned long)(p - d + llen + 2) > n) 2020 { 2021 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2022 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_DATA_LENGTH_TOO_LONG); 2023 goto err; 2024 } 2025 if (llen & 1) 2026 { 2027 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2028 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_SIGNATURE_ALGORITHMS_ERROR); 2029 goto err; 2030 } 2031 tls1_process_sigalgs(s, p, llen); 2032 p += llen; 2033 } 2034 2035 /* get the CA RDNs */ 2036 n2s(p,llen); 2037 #if 0 2038 { 2039 FILE *out; 2040 out=fopen("/tmp/vsign.der","w"); 2041 fwrite(p,1,llen,out); 2042 fclose(out); 2043 } 2044 #endif 2045 2046 if ((unsigned long)(p - d + llen) != n) 2047 { 2048 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2049 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 2050 goto err; 2051 } 2052 2053 for (nc=0; nc<llen; ) 2054 { 2055 n2s(p,l); 2056 if ((l+nc+2) > llen) 2057 { 2058 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 2059 goto cont; /* netscape bugs */ 2060 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2061 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 2062 goto err; 2063 } 2064 2065 q=p; 2066 2067 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 2068 { 2069 /* If netscape tolerance is on, ignore errors */ 2070 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 2071 goto cont; 2072 else 2073 { 2074 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2075 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 2076 goto err; 2077 } 2078 } 2079 2080 if (q != (p+l)) 2081 { 2082 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2083 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 2084 goto err; 2085 } 2086 if (!sk_X509_NAME_push(ca_sk,xn)) 2087 { 2088 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 2089 goto err; 2090 } 2091 2092 p+=l; 2093 nc+=l+2; 2094 } 2095 2096 if (0) 2097 { 2098 cont: 2099 ERR_clear_error(); 2100 } 2101 2102 /* we should setup a certificate to return.... */ 2103 s->s3->tmp.cert_req=1; 2104 s->s3->tmp.ctype_num=ctype_num; 2105 if (s->s3->tmp.ca_names != NULL) 2106 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 2107 s->s3->tmp.ca_names=ca_sk; 2108 ca_sk=NULL; 2109 2110 ret=1; 2111 err: 2112 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 2113 return(ret); 2114 } 2115 2116 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 2117 { 2118 return(X509_NAME_cmp(*a,*b)); 2119 } 2120 #ifndef OPENSSL_NO_TLSEXT 2121 int ssl3_get_new_session_ticket(SSL *s) 2122 { 2123 int ok,al,ret=0, ticklen; 2124 long n; 2125 const unsigned char *p; 2126 unsigned char *d; 2127 2128 n=s->method->ssl_get_message(s, 2129 SSL3_ST_CR_SESSION_TICKET_A, 2130 SSL3_ST_CR_SESSION_TICKET_B, 2131 -1, 2132 16384, 2133 &ok); 2134 2135 if (!ok) 2136 return((int)n); 2137 2138 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 2139 { 2140 s->s3->tmp.reuse_message=1; 2141 return(1); 2142 } 2143 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) 2144 { 2145 al=SSL_AD_UNEXPECTED_MESSAGE; 2146 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE); 2147 goto f_err; 2148 } 2149 if (n < 6) 2150 { 2151 /* need at least ticket_lifetime_hint + ticket length */ 2152 al = SSL_AD_DECODE_ERROR; 2153 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2154 goto f_err; 2155 } 2156 2157 p=d=(unsigned char *)s->init_msg; 2158 n2l(p, s->session->tlsext_tick_lifetime_hint); 2159 n2s(p, ticklen); 2160 /* ticket_lifetime_hint + ticket_length + ticket */ 2161 if (ticklen + 6 != n) 2162 { 2163 al = SSL_AD_DECODE_ERROR; 2164 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 2165 goto f_err; 2166 } 2167 if (s->session->tlsext_tick) 2168 { 2169 OPENSSL_free(s->session->tlsext_tick); 2170 s->session->tlsext_ticklen = 0; 2171 } 2172 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 2173 if (!s->session->tlsext_tick) 2174 { 2175 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 2176 goto err; 2177 } 2178 memcpy(s->session->tlsext_tick, p, ticklen); 2179 s->session->tlsext_ticklen = ticklen; 2180 /* There are two ways to detect a resumed ticket sesion. 2181 * One is to set an appropriate session ID and then the server 2182 * must return a match in ServerHello. This allows the normal 2183 * client session ID matching to work and we know much 2184 * earlier that the ticket has been accepted. 2185 * 2186 * The other way is to set zero length session ID when the 2187 * ticket is presented and rely on the handshake to determine 2188 * session resumption. 2189 * 2190 * We choose the former approach because this fits in with 2191 * assumptions elsewhere in OpenSSL. The session ID is set 2192 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 2193 * ticket. 2194 */ 2195 EVP_Digest(p, ticklen, 2196 s->session->session_id, &s->session->session_id_length, 2197 #ifndef OPENSSL_NO_SHA256 2198 EVP_sha256(), NULL); 2199 #else 2200 EVP_sha1(), NULL); 2201 #endif 2202 ret=1; 2203 return(ret); 2204 f_err: 2205 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2206 err: 2207 return(-1); 2208 } 2209 2210 int ssl3_get_cert_status(SSL *s) 2211 { 2212 int ok, al; 2213 unsigned long resplen,n; 2214 const unsigned char *p; 2215 2216 n=s->method->ssl_get_message(s, 2217 SSL3_ST_CR_CERT_STATUS_A, 2218 SSL3_ST_CR_CERT_STATUS_B, 2219 SSL3_MT_CERTIFICATE_STATUS, 2220 16384, 2221 &ok); 2222 2223 if (!ok) return((int)n); 2224 if (n < 4) 2225 { 2226 /* need at least status type + length */ 2227 al = SSL_AD_DECODE_ERROR; 2228 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2229 goto f_err; 2230 } 2231 p = (unsigned char *)s->init_msg; 2232 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 2233 { 2234 al = SSL_AD_DECODE_ERROR; 2235 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 2236 goto f_err; 2237 } 2238 n2l3(p, resplen); 2239 if (resplen + 4 != n) 2240 { 2241 al = SSL_AD_DECODE_ERROR; 2242 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 2243 goto f_err; 2244 } 2245 if (s->tlsext_ocsp_resp) 2246 OPENSSL_free(s->tlsext_ocsp_resp); 2247 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 2248 if (!s->tlsext_ocsp_resp) 2249 { 2250 al = SSL_AD_INTERNAL_ERROR; 2251 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2252 goto f_err; 2253 } 2254 s->tlsext_ocsp_resplen = resplen; 2255 if (s->ctx->tlsext_status_cb) 2256 { 2257 int ret; 2258 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 2259 if (ret == 0) 2260 { 2261 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 2262 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 2263 goto f_err; 2264 } 2265 if (ret < 0) 2266 { 2267 al = SSL_AD_INTERNAL_ERROR; 2268 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 2269 goto f_err; 2270 } 2271 } 2272 return 1; 2273 f_err: 2274 ssl3_send_alert(s,SSL3_AL_FATAL,al); 2275 return(-1); 2276 } 2277 #endif 2278 2279 int ssl3_get_server_done(SSL *s) 2280 { 2281 int ok,ret=0; 2282 long n; 2283 2284 n=s->method->ssl_get_message(s, 2285 SSL3_ST_CR_SRVR_DONE_A, 2286 SSL3_ST_CR_SRVR_DONE_B, 2287 SSL3_MT_SERVER_DONE, 2288 30, /* should be very small, like 0 :-) */ 2289 &ok); 2290 2291 if (!ok) return((int)n); 2292 if (n > 0) 2293 { 2294 /* should contain no data */ 2295 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 2296 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 2297 return -1; 2298 } 2299 ret=1; 2300 return(ret); 2301 } 2302 2303 2304 int ssl3_send_client_key_exchange(SSL *s) 2305 { 2306 unsigned char *p,*d; 2307 int n = 0; 2308 unsigned long alg_k; 2309 unsigned long alg_a; 2310 #ifndef OPENSSL_NO_RSA 2311 unsigned char *q; 2312 EVP_PKEY *pkey=NULL; 2313 #endif 2314 #ifndef OPENSSL_NO_KRB5 2315 KSSL_ERR kssl_err; 2316 #endif /* OPENSSL_NO_KRB5 */ 2317 #ifndef OPENSSL_NO_ECDH 2318 EC_KEY *clnt_ecdh = NULL; 2319 const EC_POINT *srvr_ecpoint = NULL; 2320 EVP_PKEY *srvr_pub_pkey = NULL; 2321 unsigned char *encodedPoint = NULL; 2322 int encoded_pt_len = 0; 2323 BN_CTX * bn_ctx = NULL; 2324 #ifndef OPENSSL_NO_PSK 2325 unsigned int psk_len = 0; 2326 unsigned char psk[PSK_MAX_PSK_LEN]; 2327 #endif /* OPENSSL_NO_PSK */ 2328 #endif /* OPENSSL_NO_ECDH */ 2329 2330 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 2331 { 2332 d=(unsigned char *)s->init_buf->data; 2333 p= &(d[4]); 2334 2335 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 2336 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 2337 2338 #ifndef OPENSSL_NO_PSK 2339 if (alg_a & SSL_aPSK) 2340 { 2341 char identity[PSK_MAX_IDENTITY_LEN + 1]; 2342 size_t identity_len; 2343 unsigned char *t = NULL; 2344 unsigned char pre_ms[PSK_MAX_PSK_LEN*2+4]; 2345 unsigned int pre_ms_len = 0; 2346 int psk_err = 1; 2347 2348 n = 0; 2349 if (s->psk_client_callback == NULL) 2350 { 2351 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2352 SSL_R_PSK_NO_CLIENT_CB); 2353 goto err; 2354 } 2355 2356 memset(identity, 0, sizeof(identity)); 2357 psk_len = s->psk_client_callback(s, s->session->psk_identity_hint, 2358 identity, sizeof(identity), psk, sizeof(psk)); 2359 if (psk_len > PSK_MAX_PSK_LEN) 2360 { 2361 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2362 ERR_R_INTERNAL_ERROR); 2363 goto psk_err; 2364 } 2365 else if (psk_len == 0) 2366 { 2367 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2368 SSL_R_PSK_IDENTITY_NOT_FOUND); 2369 goto psk_err; 2370 } 2371 identity_len = strnlen(identity, sizeof(identity)); 2372 if (identity_len > PSK_MAX_IDENTITY_LEN) 2373 { 2374 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2375 ERR_R_INTERNAL_ERROR); 2376 goto psk_err; 2377 } 2378 2379 if (!(alg_k & SSL_kEECDH)) 2380 { 2381 /* Create the shared secret now if we're not using ECDHE-PSK.*/ 2382 pre_ms_len = 2+psk_len+2+psk_len; 2383 t = pre_ms; 2384 s2n(psk_len, t); 2385 memset(t, 0, psk_len); 2386 t+=psk_len; 2387 s2n(psk_len, t); 2388 memcpy(t, psk, psk_len); 2389 2390 s->session->master_key_length = 2391 s->method->ssl3_enc->generate_master_secret(s, 2392 s->session->master_key, 2393 pre_ms, pre_ms_len); 2394 s2n(identity_len, p); 2395 memcpy(p, identity, identity_len); 2396 n = 2 + identity_len; 2397 } 2398 2399 if (s->session->psk_identity != NULL) 2400 OPENSSL_free(s->session->psk_identity); 2401 s->session->psk_identity = BUF_strdup(identity); 2402 if (s->session->psk_identity == NULL) 2403 { 2404 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2405 ERR_R_MALLOC_FAILURE); 2406 goto psk_err; 2407 } 2408 psk_err = 0; 2409 psk_err: 2410 OPENSSL_cleanse(identity, PSK_MAX_IDENTITY_LEN); 2411 OPENSSL_cleanse(pre_ms, sizeof(pre_ms)); 2412 if (psk_err != 0) 2413 { 2414 ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); 2415 goto err; 2416 } 2417 } 2418 #endif 2419 /* Fool emacs indentation */ 2420 if (0) {} 2421 #ifndef OPENSSL_NO_RSA 2422 else if (alg_k & SSL_kRSA) 2423 { 2424 RSA *rsa; 2425 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2426 2427 if (s->session->sess_cert->peer_rsa_tmp != NULL) 2428 rsa=s->session->sess_cert->peer_rsa_tmp; 2429 else 2430 { 2431 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 2432 if ((pkey == NULL) || 2433 (pkey->type != EVP_PKEY_RSA) || 2434 (pkey->pkey.rsa == NULL)) 2435 { 2436 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 2437 goto err; 2438 } 2439 rsa=pkey->pkey.rsa; 2440 EVP_PKEY_free(pkey); 2441 } 2442 2443 tmp_buf[0]=s->client_version>>8; 2444 tmp_buf[1]=s->client_version&0xff; 2445 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2446 goto err; 2447 2448 s->session->master_key_length=sizeof tmp_buf; 2449 2450 q=p; 2451 /* Fix buf for TLS and beyond */ 2452 if (s->version > SSL3_VERSION) 2453 p+=2; 2454 n=RSA_public_encrypt(sizeof tmp_buf, 2455 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 2456 #ifdef PKCS1_CHECK 2457 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 2458 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 2459 #endif 2460 if (n <= 0) 2461 { 2462 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 2463 goto err; 2464 } 2465 2466 /* Fix buf for TLS and beyond */ 2467 if (s->version > SSL3_VERSION) 2468 { 2469 s2n(n,q); 2470 n+=2; 2471 } 2472 2473 s->session->master_key_length= 2474 s->method->ssl3_enc->generate_master_secret(s, 2475 s->session->master_key, 2476 tmp_buf,sizeof tmp_buf); 2477 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 2478 } 2479 #endif 2480 #ifndef OPENSSL_NO_KRB5 2481 else if (alg_k & SSL_kKRB5) 2482 { 2483 krb5_error_code krb5rc; 2484 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2485 /* krb5_data krb5_ap_req; */ 2486 krb5_data *enc_ticket; 2487 krb5_data authenticator, *authp = NULL; 2488 EVP_CIPHER_CTX ciph_ctx; 2489 const EVP_CIPHER *enc = NULL; 2490 unsigned char iv[EVP_MAX_IV_LENGTH]; 2491 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2492 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 2493 + EVP_MAX_IV_LENGTH]; 2494 int padl, outl = sizeof(epms); 2495 2496 EVP_CIPHER_CTX_init(&ciph_ctx); 2497 2498 #ifdef KSSL_DEBUG 2499 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 2500 alg_k, SSL_kKRB5); 2501 #endif /* KSSL_DEBUG */ 2502 2503 authp = NULL; 2504 #ifdef KRB5SENDAUTH 2505 if (KRB5SENDAUTH) authp = &authenticator; 2506 #endif /* KRB5SENDAUTH */ 2507 2508 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 2509 &kssl_err); 2510 enc = kssl_map_enc(kssl_ctx->enctype); 2511 if (enc == NULL) 2512 goto err; 2513 #ifdef KSSL_DEBUG 2514 { 2515 printf("kssl_cget_tkt rtn %d\n", krb5rc); 2516 if (krb5rc && kssl_err.text) 2517 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 2518 } 2519 #endif /* KSSL_DEBUG */ 2520 2521 if (krb5rc) 2522 { 2523 ssl3_send_alert(s,SSL3_AL_FATAL, 2524 SSL_AD_HANDSHAKE_FAILURE); 2525 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2526 kssl_err.reason); 2527 goto err; 2528 } 2529 2530 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2531 ** in place of RFC 2712 KerberosWrapper, as in: 2532 ** 2533 ** Send ticket (copy to *p, set n = length) 2534 ** n = krb5_ap_req.length; 2535 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2536 ** if (krb5_ap_req.data) 2537 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2538 ** 2539 ** Now using real RFC 2712 KerberosWrapper 2540 ** (Thanks to Simon Wilkinson <sxw (at) sxw.org.uk>) 2541 ** Note: 2712 "opaque" types are here replaced 2542 ** with a 2-byte length followed by the value. 2543 ** Example: 2544 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2545 ** Where "xx xx" = length bytes. Shown here with 2546 ** optional authenticator omitted. 2547 */ 2548 2549 /* KerberosWrapper.Ticket */ 2550 s2n(enc_ticket->length,p); 2551 memcpy(p, enc_ticket->data, enc_ticket->length); 2552 p+= enc_ticket->length; 2553 n = enc_ticket->length + 2; 2554 2555 /* KerberosWrapper.Authenticator */ 2556 if (authp && authp->length) 2557 { 2558 s2n(authp->length,p); 2559 memcpy(p, authp->data, authp->length); 2560 p+= authp->length; 2561 n+= authp->length + 2; 2562 2563 free(authp->data); 2564 authp->data = NULL; 2565 authp->length = 0; 2566 } 2567 else 2568 { 2569 s2n(0,p);/* null authenticator length */ 2570 n+=2; 2571 } 2572 2573 tmp_buf[0]=s->client_version>>8; 2574 tmp_buf[1]=s->client_version&0xff; 2575 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2576 goto err; 2577 2578 /* 20010420 VRS. Tried it this way; failed. 2579 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2580 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2581 ** kssl_ctx->length); 2582 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2583 */ 2584 2585 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2586 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2587 kssl_ctx->key,iv); 2588 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2589 sizeof tmp_buf); 2590 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2591 outl += padl; 2592 if (outl > (int)sizeof epms) 2593 { 2594 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2595 goto err; 2596 } 2597 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2598 2599 /* KerberosWrapper.EncryptedPreMasterSecret */ 2600 s2n(outl,p); 2601 memcpy(p, epms, outl); 2602 p+=outl; 2603 n+=outl + 2; 2604 2605 s->session->master_key_length= 2606 s->method->ssl3_enc->generate_master_secret(s, 2607 s->session->master_key, 2608 tmp_buf, sizeof tmp_buf); 2609 2610 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2611 OPENSSL_cleanse(epms, outl); 2612 } 2613 #endif 2614 #ifndef OPENSSL_NO_DH 2615 else if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2616 { 2617 DH *dh_srvr,*dh_clnt; 2618 2619 if (s->session->sess_cert == NULL) 2620 { 2621 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2622 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2623 goto err; 2624 } 2625 2626 if (s->session->sess_cert->peer_dh_tmp != NULL) 2627 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2628 else 2629 { 2630 /* we get them from the cert */ 2631 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2632 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2633 goto err; 2634 } 2635 2636 /* generate a new random key */ 2637 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2638 { 2639 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2640 goto err; 2641 } 2642 if (!DH_generate_key(dh_clnt)) 2643 { 2644 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2645 DH_free(dh_clnt); 2646 goto err; 2647 } 2648 2649 /* use the 'p' output buffer for the DH key, but 2650 * make sure to clear it out afterwards */ 2651 2652 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2653 2654 if (n <= 0) 2655 { 2656 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2657 DH_free(dh_clnt); 2658 goto err; 2659 } 2660 2661 /* generate master key from the result */ 2662 s->session->master_key_length= 2663 s->method->ssl3_enc->generate_master_secret(s, 2664 s->session->master_key,p,n); 2665 /* clean up */ 2666 memset(p,0,n); 2667 2668 /* send off the data */ 2669 n=BN_num_bytes(dh_clnt->pub_key); 2670 s2n(n,p); 2671 BN_bn2bin(dh_clnt->pub_key,p); 2672 n+=2; 2673 2674 DH_free(dh_clnt); 2675 2676 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2677 } 2678 #endif 2679 #ifndef OPENSSL_NO_ECDH 2680 else if (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) 2681 { 2682 const EC_GROUP *srvr_group = NULL; 2683 EC_KEY *tkey; 2684 int ecdh_clnt_cert = 0; 2685 int field_size = 0; 2686 #ifndef OPENSSL_NO_PSK 2687 unsigned char *pre_ms; 2688 unsigned char *t; 2689 unsigned int pre_ms_len; 2690 unsigned int i; 2691 #endif 2692 2693 if (s->session->sess_cert == NULL) 2694 { 2695 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2696 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2697 goto err; 2698 } 2699 2700 /* Did we send out the client's 2701 * ECDH share for use in premaster 2702 * computation as part of client certificate? 2703 * If so, set ecdh_clnt_cert to 1. 2704 */ 2705 if ((alg_k & (SSL_kECDHr|SSL_kECDHe)) && (s->cert != NULL)) 2706 { 2707 /* XXX: For now, we do not support client 2708 * authentication using ECDH certificates. 2709 * To add such support, one needs to add 2710 * code that checks for appropriate 2711 * conditions and sets ecdh_clnt_cert to 1. 2712 * For example, the cert have an ECC 2713 * key on the same curve as the server's 2714 * and the key should be authorized for 2715 * key agreement. 2716 * 2717 * One also needs to add code in ssl3_connect 2718 * to skip sending the certificate verify 2719 * message. 2720 * 2721 * if ((s->cert->key->privatekey != NULL) && 2722 * (s->cert->key->privatekey->type == 2723 * EVP_PKEY_EC) && ...) 2724 * ecdh_clnt_cert = 1; 2725 */ 2726 } 2727 2728 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2729 { 2730 tkey = s->session->sess_cert->peer_ecdh_tmp; 2731 } 2732 else 2733 { 2734 /* Get the Server Public Key from Cert */ 2735 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2736 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2737 if ((srvr_pub_pkey == NULL) || 2738 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2739 (srvr_pub_pkey->pkey.ec == NULL)) 2740 { 2741 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2742 ERR_R_INTERNAL_ERROR); 2743 goto err; 2744 } 2745 2746 tkey = srvr_pub_pkey->pkey.ec; 2747 } 2748 2749 srvr_group = EC_KEY_get0_group(tkey); 2750 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2751 2752 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2753 { 2754 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2755 ERR_R_INTERNAL_ERROR); 2756 goto err; 2757 } 2758 2759 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2760 { 2761 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2762 goto err; 2763 } 2764 2765 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2766 { 2767 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2768 goto err; 2769 } 2770 if (ecdh_clnt_cert) 2771 { 2772 /* Reuse key info from our certificate 2773 * We only need our private key to perform 2774 * the ECDH computation. 2775 */ 2776 const BIGNUM *priv_key; 2777 tkey = s->cert->key->privatekey->pkey.ec; 2778 priv_key = EC_KEY_get0_private_key(tkey); 2779 if (priv_key == NULL) 2780 { 2781 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2782 goto err; 2783 } 2784 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2785 { 2786 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2787 goto err; 2788 } 2789 } 2790 else 2791 { 2792 /* Generate a new ECDH key pair */ 2793 if (!(EC_KEY_generate_key(clnt_ecdh))) 2794 { 2795 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2796 goto err; 2797 } 2798 } 2799 2800 /* use the 'p' output buffer for the ECDH key, but 2801 * make sure to clear it out afterwards 2802 */ 2803 2804 field_size = EC_GROUP_get_degree(srvr_group); 2805 if (field_size <= 0) 2806 { 2807 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2808 ERR_R_ECDH_LIB); 2809 goto err; 2810 } 2811 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2812 if (n <= 0) 2813 { 2814 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2815 ERR_R_ECDH_LIB); 2816 goto err; 2817 } 2818 2819 #ifndef OPENSSL_NO_PSK 2820 /* ECDHE PSK ciphersuites from RFC 5489 */ 2821 if ((alg_a & SSL_aPSK) && psk_len != 0) 2822 { 2823 pre_ms_len = 2+psk_len+2+n; 2824 pre_ms = OPENSSL_malloc(pre_ms_len); 2825 if (pre_ms == NULL) 2826 { 2827 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2828 ERR_R_MALLOC_FAILURE); 2829 goto err; 2830 } 2831 memset(pre_ms, 0, pre_ms_len); 2832 t = pre_ms; 2833 s2n(psk_len, t); 2834 memcpy(t, psk, psk_len); 2835 t += psk_len; 2836 s2n(n, t); 2837 memcpy(t, p, n); 2838 s->session->master_key_length = s->method->ssl3_enc \ 2839 -> generate_master_secret(s, 2840 s->session->master_key, pre_ms, pre_ms_len); 2841 OPENSSL_cleanse(pre_ms, pre_ms_len); 2842 OPENSSL_free(pre_ms); 2843 } 2844 #endif /* OPENSSL_NO_PSK */ 2845 if (!(alg_a & SSL_aPSK)) 2846 { 2847 /* generate master key from the result */ 2848 s->session->master_key_length = s->method->ssl3_enc \ 2849 -> generate_master_secret(s, 2850 s->session->master_key, p, n); 2851 } 2852 memset(p, 0, n); /* clean up */ 2853 if (ecdh_clnt_cert) 2854 { 2855 /* Send empty client key exch message */ 2856 n = 0; 2857 } 2858 else 2859 { 2860 /* First check the size of encoding and 2861 * allocate memory accordingly. 2862 */ 2863 encoded_pt_len = 2864 EC_POINT_point2oct(srvr_group, 2865 EC_KEY_get0_public_key(clnt_ecdh), 2866 POINT_CONVERSION_UNCOMPRESSED, 2867 NULL, 0, NULL); 2868 2869 encodedPoint = (unsigned char *) 2870 OPENSSL_malloc(encoded_pt_len * 2871 sizeof(unsigned char)); 2872 bn_ctx = BN_CTX_new(); 2873 if ((encodedPoint == NULL) || 2874 (bn_ctx == NULL)) 2875 { 2876 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2877 goto err; 2878 } 2879 2880 /* Encode the public key */ 2881 encoded_pt_len = EC_POINT_point2oct(srvr_group, 2882 EC_KEY_get0_public_key(clnt_ecdh), 2883 POINT_CONVERSION_UNCOMPRESSED, 2884 encodedPoint, encoded_pt_len, bn_ctx); 2885 2886 n = 0; 2887 #ifndef OPENSSL_NO_PSK 2888 if ((alg_a & SSL_aPSK) && psk_len != 0) 2889 { 2890 i = strlen(s->session->psk_identity); 2891 s2n(i, p); 2892 memcpy(p, s->session->psk_identity, i); 2893 p += i; 2894 n = i + 2; 2895 } 2896 #endif 2897 2898 *p = encoded_pt_len; /* length of encoded point */ 2899 /* Encoded point will be copied here */ 2900 p += 1; 2901 n += 1; 2902 /* copy the point */ 2903 memcpy((unsigned char *)p, encodedPoint, encoded_pt_len); 2904 /* increment n to account for length field */ 2905 n += encoded_pt_len; 2906 } 2907 2908 /* Free allocated memory */ 2909 BN_CTX_free(bn_ctx); 2910 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2911 if (clnt_ecdh != NULL) 2912 EC_KEY_free(clnt_ecdh); 2913 EVP_PKEY_free(srvr_pub_pkey); 2914 } 2915 #endif /* !OPENSSL_NO_ECDH */ 2916 else if (alg_k & SSL_kGOST) 2917 { 2918 /* GOST key exchange message creation */ 2919 EVP_PKEY_CTX *pkey_ctx; 2920 X509 *peer_cert; 2921 size_t msglen; 2922 unsigned int md_len; 2923 int keytype; 2924 unsigned char premaster_secret[32],shared_ukm[32], tmp[256]; 2925 EVP_MD_CTX *ukm_hash; 2926 EVP_PKEY *pub_key; 2927 2928 /* Get server sertificate PKEY and create ctx from it */ 2929 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST01)].x509; 2930 if (!peer_cert) 2931 peer_cert=s->session->sess_cert->peer_pkeys[(keytype=SSL_PKEY_GOST94)].x509; 2932 if (!peer_cert) { 2933 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_NO_GOST_CERTIFICATE_SENT_BY_PEER); 2934 goto err; 2935 } 2936 2937 pkey_ctx=EVP_PKEY_CTX_new(pub_key=X509_get_pubkey(peer_cert),NULL); 2938 /* If we have send a certificate, and certificate key 2939 2940 * parameters match those of server certificate, use 2941 * certificate key for key exchange 2942 */ 2943 2944 /* Otherwise, generate ephemeral key pair */ 2945 2946 EVP_PKEY_encrypt_init(pkey_ctx); 2947 /* Generate session key */ 2948 RAND_bytes(premaster_secret,32); 2949 /* If we have client certificate, use its secret as peer key */ 2950 if (s->s3->tmp.cert_req && s->cert->key->privatekey) { 2951 if (EVP_PKEY_derive_set_peer(pkey_ctx,s->cert->key->privatekey) <=0) { 2952 /* If there was an error - just ignore it. Ephemeral key 2953 * would be used 2954 */ 2955 ERR_clear_error(); 2956 } 2957 } 2958 /* Compute shared IV and store it in algorithm-specific 2959 * context data */ 2960 ukm_hash = EVP_MD_CTX_create(); 2961 EVP_DigestInit(ukm_hash,EVP_get_digestbynid(NID_id_GostR3411_94)); 2962 EVP_DigestUpdate(ukm_hash,s->s3->client_random,SSL3_RANDOM_SIZE); 2963 EVP_DigestUpdate(ukm_hash,s->s3->server_random,SSL3_RANDOM_SIZE); 2964 EVP_DigestFinal_ex(ukm_hash, shared_ukm, &md_len); 2965 EVP_MD_CTX_destroy(ukm_hash); 2966 if (EVP_PKEY_CTX_ctrl(pkey_ctx,-1,EVP_PKEY_OP_ENCRYPT,EVP_PKEY_CTRL_SET_IV, 2967 8,shared_ukm)<0) { 2968 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2969 SSL_R_LIBRARY_BUG); 2970 goto err; 2971 } 2972 /* Make GOST keytransport blob message */ 2973 /*Encapsulate it into sequence */ 2974 *(p++)=V_ASN1_SEQUENCE | V_ASN1_CONSTRUCTED; 2975 msglen=255; 2976 if (EVP_PKEY_encrypt(pkey_ctx,tmp,&msglen,premaster_secret,32)<0) { 2977 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2978 SSL_R_LIBRARY_BUG); 2979 goto err; 2980 } 2981 if (msglen >= 0x80) 2982 { 2983 *(p++)=0x81; 2984 *(p++)= msglen & 0xff; 2985 n=msglen+3; 2986 } 2987 else 2988 { 2989 *(p++)= msglen & 0xff; 2990 n=msglen+2; 2991 } 2992 memcpy(p, tmp, msglen); 2993 /* Check if pubkey from client certificate was used */ 2994 if (EVP_PKEY_CTX_ctrl(pkey_ctx, -1, -1, EVP_PKEY_CTRL_PEER_KEY, 2, NULL) > 0) 2995 { 2996 /* Set flag "skip certificate verify" */ 2997 s->s3->flags |= TLS1_FLAGS_SKIP_CERT_VERIFY; 2998 } 2999 EVP_PKEY_CTX_free(pkey_ctx); 3000 s->session->master_key_length= 3001 s->method->ssl3_enc->generate_master_secret(s, 3002 s->session->master_key,premaster_secret,32); 3003 EVP_PKEY_free(pub_key); 3004 3005 } 3006 #ifndef OPENSSL_NO_SRP 3007 else if (alg_k & SSL_kSRP) 3008 { 3009 if (s->srp_ctx.A != NULL) 3010 { 3011 /* send off the data */ 3012 n=BN_num_bytes(s->srp_ctx.A); 3013 s2n(n,p); 3014 BN_bn2bin(s->srp_ctx.A,p); 3015 n+=2; 3016 } 3017 else 3018 { 3019 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 3020 goto err; 3021 } 3022 if (s->session->srp_username != NULL) 3023 OPENSSL_free(s->session->srp_username); 3024 s->session->srp_username = BUF_strdup(s->srp_ctx.login); 3025 if (s->session->srp_username == NULL) 3026 { 3027 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3028 ERR_R_MALLOC_FAILURE); 3029 goto err; 3030 } 3031 3032 if ((s->session->master_key_length = SRP_generate_client_master_secret(s,s->session->master_key))<0) 3033 { 3034 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 3035 goto err; 3036 } 3037 } 3038 #endif 3039 else if (!(alg_k & SSL_kPSK) || ((alg_k & SSL_kPSK) && !(alg_a & SSL_aPSK))) 3040 { 3041 ssl3_send_alert(s, SSL3_AL_FATAL, 3042 SSL_AD_HANDSHAKE_FAILURE); 3043 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 3044 ERR_R_INTERNAL_ERROR); 3045 goto err; 3046 } 3047 3048 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 3049 l2n3(n,d); 3050 3051 s->state=SSL3_ST_CW_KEY_EXCH_B; 3052 /* number of bytes to write */ 3053 s->init_num=n+4; 3054 s->init_off=0; 3055 } 3056 3057 /* SSL3_ST_CW_KEY_EXCH_B */ 3058 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3059 err: 3060 #ifndef OPENSSL_NO_ECDH 3061 BN_CTX_free(bn_ctx); 3062 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 3063 if (clnt_ecdh != NULL) 3064 EC_KEY_free(clnt_ecdh); 3065 EVP_PKEY_free(srvr_pub_pkey); 3066 #endif 3067 return(-1); 3068 } 3069 3070 int ssl3_send_client_verify(SSL *s) 3071 { 3072 unsigned char *p,*d; 3073 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 3074 EVP_PKEY *pkey; 3075 EVP_PKEY_CTX *pctx=NULL; 3076 EVP_MD_CTX mctx; 3077 unsigned u=0; 3078 unsigned long n; 3079 int j; 3080 3081 EVP_MD_CTX_init(&mctx); 3082 3083 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 3084 { 3085 d=(unsigned char *)s->init_buf->data; 3086 p= &(d[4]); 3087 pkey=s->cert->key->privatekey; 3088 /* Create context from key and test if sha1 is allowed as digest */ 3089 pctx = EVP_PKEY_CTX_new(pkey,NULL); 3090 EVP_PKEY_sign_init(pctx); 3091 if (EVP_PKEY_CTX_set_signature_md(pctx, EVP_sha1())>0) 3092 { 3093 if (TLS1_get_version(s) < TLS1_2_VERSION) 3094 s->method->ssl3_enc->cert_verify_mac(s, 3095 NID_sha1, 3096 &(data[MD5_DIGEST_LENGTH])); 3097 } 3098 else 3099 { 3100 ERR_clear_error(); 3101 } 3102 /* For TLS v1.2 send signature algorithm and signature 3103 * using agreed digest and cached handshake records. 3104 */ 3105 if (TLS1_get_version(s) >= TLS1_2_VERSION) 3106 { 3107 long hdatalen = 0; 3108 void *hdata; 3109 const EVP_MD *md; 3110 switch (ssl_cert_type(NULL, pkey)) 3111 { 3112 case SSL_PKEY_RSA_ENC: 3113 md = s->s3->digest_rsa; 3114 break; 3115 case SSL_PKEY_DSA_SIGN: 3116 md = s->s3->digest_dsa; 3117 break; 3118 case SSL_PKEY_ECC: 3119 md = s->s3->digest_ecdsa; 3120 break; 3121 default: 3122 md = NULL; 3123 } 3124 if (!md) 3125 /* Unlike with the SignatureAlgorithm extension (sent by clients), 3126 * there are no default algorithms for the CertificateRequest message 3127 * (sent by servers). However, now that we've sent a certificate 3128 * for which we don't really know what hash to use for signing, the 3129 * best we can do is try a default algorithm. */ 3130 md = EVP_sha1(); 3131 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, 3132 &hdata); 3133 if (hdatalen <= 0 || !tls12_get_sigandhash(p, pkey, md)) 3134 { 3135 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3136 ERR_R_INTERNAL_ERROR); 3137 goto err; 3138 } 3139 p += 2; 3140 #ifdef SSL_DEBUG 3141 fprintf(stderr, "Using TLS 1.2 with client alg %s\n", 3142 EVP_MD_name(md)); 3143 #endif 3144 if (!EVP_SignInit_ex(&mctx, md, NULL) 3145 || !EVP_SignUpdate(&mctx, hdata, hdatalen) 3146 || !EVP_SignFinal(&mctx, p + 2, &u, pkey)) 3147 { 3148 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3149 ERR_R_EVP_LIB); 3150 goto err; 3151 } 3152 s2n(u,p); 3153 n = u + 4; 3154 if (!ssl3_digest_cached_records(s)) 3155 goto err; 3156 } 3157 else 3158 #ifndef OPENSSL_NO_RSA 3159 if (pkey->type == EVP_PKEY_RSA) 3160 { 3161 s->method->ssl3_enc->cert_verify_mac(s, 3162 NID_md5, 3163 &(data[0])); 3164 if (RSA_sign(NID_md5_sha1, data, 3165 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 3166 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 3167 { 3168 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 3169 goto err; 3170 } 3171 s2n(u,p); 3172 n=u+2; 3173 } 3174 else 3175 #endif 3176 #ifndef OPENSSL_NO_DSA 3177 if (pkey->type == EVP_PKEY_DSA) 3178 { 3179 if (!DSA_sign(pkey->save_type, 3180 &(data[MD5_DIGEST_LENGTH]), 3181 SHA_DIGEST_LENGTH,&(p[2]), 3182 (unsigned int *)&j,pkey->pkey.dsa)) 3183 { 3184 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 3185 goto err; 3186 } 3187 s2n(j,p); 3188 n=j+2; 3189 } 3190 else 3191 #endif 3192 #ifndef OPENSSL_NO_ECDSA 3193 if (pkey->type == EVP_PKEY_EC) 3194 { 3195 if (!ECDSA_sign(pkey->save_type, 3196 &(data[MD5_DIGEST_LENGTH]), 3197 SHA_DIGEST_LENGTH,&(p[2]), 3198 (unsigned int *)&j,pkey->pkey.ec)) 3199 { 3200 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3201 ERR_R_ECDSA_LIB); 3202 goto err; 3203 } 3204 s2n(j,p); 3205 n=j+2; 3206 } 3207 else 3208 #endif 3209 if (pkey->type == NID_id_GostR3410_94 || pkey->type == NID_id_GostR3410_2001) 3210 { 3211 unsigned char signbuf[64]; 3212 int i; 3213 size_t sigsize=64; 3214 s->method->ssl3_enc->cert_verify_mac(s, 3215 NID_id_GostR3411_94, 3216 data); 3217 if (EVP_PKEY_sign(pctx, signbuf, &sigsize, data, 32) <= 0) { 3218 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 3219 ERR_R_INTERNAL_ERROR); 3220 goto err; 3221 } 3222 for (i=63,j=0; i>=0; j++, i--) { 3223 p[2+j]=signbuf[i]; 3224 } 3225 s2n(j,p); 3226 n=j+2; 3227 } 3228 else 3229 { 3230 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 3231 goto err; 3232 } 3233 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 3234 l2n3(n,d); 3235 3236 s->state=SSL3_ST_CW_CERT_VRFY_B; 3237 s->init_num=(int)n+4; 3238 s->init_off=0; 3239 } 3240 EVP_MD_CTX_cleanup(&mctx); 3241 EVP_PKEY_CTX_free(pctx); 3242 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3243 err: 3244 EVP_MD_CTX_cleanup(&mctx); 3245 EVP_PKEY_CTX_free(pctx); 3246 return(-1); 3247 } 3248 3249 int ssl3_send_client_certificate(SSL *s) 3250 { 3251 X509 *x509=NULL; 3252 EVP_PKEY *pkey=NULL; 3253 int i; 3254 unsigned long l; 3255 3256 if (s->state == SSL3_ST_CW_CERT_A) 3257 { 3258 if ((s->cert == NULL) || 3259 (s->cert->key->x509 == NULL) || 3260 (s->cert->key->privatekey == NULL)) 3261 s->state=SSL3_ST_CW_CERT_B; 3262 else 3263 s->state=SSL3_ST_CW_CERT_C; 3264 } 3265 3266 /* We need to get a client cert */ 3267 if (s->state == SSL3_ST_CW_CERT_B) 3268 { 3269 /* If we get an error, we need to 3270 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 3271 * We then get retied later */ 3272 i=0; 3273 i = ssl_do_client_cert_cb(s, &x509, &pkey); 3274 if (i < 0) 3275 { 3276 s->rwstate=SSL_X509_LOOKUP; 3277 return(-1); 3278 } 3279 s->rwstate=SSL_NOTHING; 3280 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 3281 { 3282 s->state=SSL3_ST_CW_CERT_B; 3283 if ( !SSL_use_certificate(s,x509) || 3284 !SSL_use_PrivateKey(s,pkey)) 3285 i=0; 3286 } 3287 else if (i == 1) 3288 { 3289 i=0; 3290 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 3291 } 3292 3293 if (x509 != NULL) X509_free(x509); 3294 if (pkey != NULL) EVP_PKEY_free(pkey); 3295 if (i == 0) 3296 { 3297 if (s->version == SSL3_VERSION) 3298 { 3299 s->s3->tmp.cert_req=0; 3300 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 3301 return(1); 3302 } 3303 else 3304 { 3305 s->s3->tmp.cert_req=2; 3306 } 3307 } 3308 3309 /* Ok, we have a cert */ 3310 s->state=SSL3_ST_CW_CERT_C; 3311 } 3312 3313 if (s->state == SSL3_ST_CW_CERT_C) 3314 { 3315 s->state=SSL3_ST_CW_CERT_D; 3316 l=ssl3_output_cert_chain(s, 3317 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 3318 s->init_num=(int)l; 3319 s->init_off=0; 3320 } 3321 /* SSL3_ST_CW_CERT_D */ 3322 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 3323 } 3324 3325 #define has_bits(i,m) (((i)&(m)) == (m)) 3326 3327 int ssl3_check_cert_and_algorithm(SSL *s) 3328 { 3329 int i,idx; 3330 long alg_k,alg_a; 3331 EVP_PKEY *pkey=NULL; 3332 SESS_CERT *sc; 3333 #ifndef OPENSSL_NO_RSA 3334 RSA *rsa; 3335 #endif 3336 #ifndef OPENSSL_NO_DH 3337 DH *dh; 3338 #endif 3339 3340 alg_k=s->s3->tmp.new_cipher->algorithm_mkey; 3341 alg_a=s->s3->tmp.new_cipher->algorithm_auth; 3342 3343 /* we don't have a certificate */ 3344 if ((alg_a & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) || ((alg_a & SSL_aPSK) && !(alg_k & SSL_kRSA))) 3345 return(1); 3346 3347 sc=s->session->sess_cert; 3348 if (sc == NULL) 3349 { 3350 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 3351 goto err; 3352 } 3353 3354 #ifndef OPENSSL_NO_RSA 3355 rsa=s->session->sess_cert->peer_rsa_tmp; 3356 #endif 3357 #ifndef OPENSSL_NO_DH 3358 dh=s->session->sess_cert->peer_dh_tmp; 3359 #endif 3360 3361 /* This is the passed certificate */ 3362 3363 idx=sc->peer_cert_type; 3364 #ifndef OPENSSL_NO_ECDH 3365 if (idx == SSL_PKEY_ECC) 3366 { 3367 if (ssl_check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 3368 s) == 0) 3369 { /* check failed */ 3370 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 3371 goto f_err; 3372 } 3373 else 3374 { 3375 return 1; 3376 } 3377 } 3378 #endif 3379 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 3380 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 3381 EVP_PKEY_free(pkey); 3382 3383 3384 /* Check that we have a certificate if we require one */ 3385 if ((alg_a & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 3386 { 3387 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 3388 goto f_err; 3389 } 3390 #ifndef OPENSSL_NO_DSA 3391 else if ((alg_a & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 3392 { 3393 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 3394 goto f_err; 3395 } 3396 #endif 3397 #ifndef OPENSSL_NO_RSA 3398 if ((alg_k & SSL_kRSA) && 3399 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 3400 { 3401 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 3402 goto f_err; 3403 } 3404 #endif 3405 #ifndef OPENSSL_NO_DH 3406 if ((alg_k & SSL_kEDH) && 3407 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 3408 { 3409 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 3410 goto f_err; 3411 } 3412 else if ((alg_k & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 3413 { 3414 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 3415 goto f_err; 3416 } 3417 #ifndef OPENSSL_NO_DSA 3418 else if ((alg_k & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 3419 { 3420 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 3421 goto f_err; 3422 } 3423 #endif 3424 #endif 3425 3426 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 3427 { 3428 #ifndef OPENSSL_NO_RSA 3429 if (alg_k & SSL_kRSA) 3430 { 3431 if (rsa == NULL 3432 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3433 { 3434 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 3435 goto f_err; 3436 } 3437 } 3438 else 3439 #endif 3440 #ifndef OPENSSL_NO_DH 3441 if (alg_k & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 3442 { 3443 if (dh == NULL 3444 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 3445 { 3446 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 3447 goto f_err; 3448 } 3449 } 3450 else 3451 #endif 3452 { 3453 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 3454 goto f_err; 3455 } 3456 } 3457 return(1); 3458 f_err: 3459 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 3460 err: 3461 return(0); 3462 } 3463 3464 #if !defined(OPENSSL_NO_TLSEXT) 3465 # if !defined(OPENSSL_NO_NEXTPROTONEG) 3466 int ssl3_send_next_proto(SSL *s) 3467 { 3468 unsigned int len, padding_len; 3469 unsigned char *d; 3470 3471 if (s->state == SSL3_ST_CW_NEXT_PROTO_A) 3472 { 3473 len = s->next_proto_negotiated_len; 3474 padding_len = 32 - ((len + 2) % 32); 3475 d = (unsigned char *)s->init_buf->data; 3476 d[4] = len; 3477 memcpy(d + 5, s->next_proto_negotiated, len); 3478 d[5 + len] = padding_len; 3479 memset(d + 6 + len, 0, padding_len); 3480 *(d++)=SSL3_MT_NEXT_PROTO; 3481 l2n3(2 + len + padding_len, d); 3482 s->state = SSL3_ST_CW_NEXT_PROTO_B; 3483 s->init_num = 4 + 2 + len + padding_len; 3484 s->init_off = 0; 3485 } 3486 3487 return ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3488 } 3489 # endif /* !OPENSSL_NO_NEXTPROTONEG */ 3490 3491 int ssl3_send_channel_id(SSL *s) 3492 { 3493 unsigned char *d; 3494 int ret = -1, public_key_len; 3495 EVP_MD_CTX md_ctx; 3496 size_t sig_len; 3497 ECDSA_SIG *sig = NULL; 3498 unsigned char *public_key = NULL, *derp, *der_sig = NULL; 3499 3500 if (s->state != SSL3_ST_CW_CHANNEL_ID_A) 3501 return ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3502 3503 if (!s->tlsext_channel_id_private && s->ctx->channel_id_cb) 3504 { 3505 EVP_PKEY *key = NULL; 3506 s->ctx->channel_id_cb(s, &key); 3507 if (key != NULL) 3508 { 3509 s->tlsext_channel_id_private = key; 3510 } 3511 } 3512 if (!s->tlsext_channel_id_private) 3513 { 3514 s->rwstate=SSL_CHANNEL_ID_LOOKUP; 3515 return (-1); 3516 } 3517 s->rwstate=SSL_NOTHING; 3518 3519 d = (unsigned char *)s->init_buf->data; 3520 *(d++)=SSL3_MT_ENCRYPTED_EXTENSIONS; 3521 l2n3(2 + 2 + TLSEXT_CHANNEL_ID_SIZE, d); 3522 if (s->s3->tlsext_channel_id_new) 3523 s2n(TLSEXT_TYPE_channel_id_new, d); 3524 else 3525 s2n(TLSEXT_TYPE_channel_id, d); 3526 s2n(TLSEXT_CHANNEL_ID_SIZE, d); 3527 3528 EVP_MD_CTX_init(&md_ctx); 3529 3530 public_key_len = i2d_PublicKey(s->tlsext_channel_id_private, NULL); 3531 if (public_key_len <= 0) 3532 { 3533 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_CANNOT_SERIALIZE_PUBLIC_KEY); 3534 goto err; 3535 } 3536 /* i2d_PublicKey will produce an ANSI X9.62 public key which, for a 3537 * P-256 key, is 0x04 (meaning uncompressed) followed by the x and y 3538 * field elements as 32-byte, big-endian numbers. */ 3539 if (public_key_len != 65) 3540 { 3541 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_CHANNEL_ID_NOT_P256); 3542 goto err; 3543 } 3544 public_key = OPENSSL_malloc(public_key_len); 3545 if (!public_key) 3546 { 3547 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,ERR_R_MALLOC_FAILURE); 3548 goto err; 3549 } 3550 3551 derp = public_key; 3552 i2d_PublicKey(s->tlsext_channel_id_private, &derp); 3553 3554 if (EVP_DigestSignInit(&md_ctx, NULL, EVP_sha256(), NULL, 3555 s->tlsext_channel_id_private) != 1) 3556 { 3557 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_EVP_DIGESTSIGNINIT_FAILED); 3558 goto err; 3559 } 3560 3561 if (!tls1_channel_id_hash(&md_ctx, s)) 3562 goto err; 3563 3564 if (!EVP_DigestSignFinal(&md_ctx, NULL, &sig_len)) 3565 { 3566 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_EVP_DIGESTSIGNFINAL_FAILED); 3567 goto err; 3568 } 3569 3570 der_sig = OPENSSL_malloc(sig_len); 3571 if (!der_sig) 3572 { 3573 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,ERR_R_MALLOC_FAILURE); 3574 goto err; 3575 } 3576 3577 if (!EVP_DigestSignFinal(&md_ctx, der_sig, &sig_len)) 3578 { 3579 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_EVP_DIGESTSIGNFINAL_FAILED); 3580 goto err; 3581 } 3582 3583 derp = der_sig; 3584 sig = d2i_ECDSA_SIG(NULL, (const unsigned char**) &derp, sig_len); 3585 if (sig == NULL) 3586 { 3587 SSLerr(SSL_F_SSL3_SEND_CHANNEL_ID,SSL_R_D2I_ECDSA_SIG); 3588 goto err; 3589 } 3590 3591 /* The first byte of public_key will be 0x4, denoting an uncompressed key. */ 3592 memcpy(d, public_key + 1, 64); 3593 d += 64; 3594 memset(d, 0, 2 * 32); 3595 BN_bn2bin(sig->r, d + 32 - BN_num_bytes(sig->r)); 3596 d += 32; 3597 BN_bn2bin(sig->s, d + 32 - BN_num_bytes(sig->s)); 3598 d += 32; 3599 3600 s->state = SSL3_ST_CW_CHANNEL_ID_B; 3601 s->init_num = 4 + 2 + 2 + TLSEXT_CHANNEL_ID_SIZE; 3602 s->init_off = 0; 3603 3604 ret = ssl3_do_write(s, SSL3_RT_HANDSHAKE); 3605 3606 err: 3607 EVP_MD_CTX_cleanup(&md_ctx); 3608 if (public_key) 3609 OPENSSL_free(public_key); 3610 if (der_sig) 3611 OPENSSL_free(der_sig); 3612 if (sig) 3613 ECDSA_SIG_free(sig); 3614 3615 return ret; 3616 } 3617 #endif /* !OPENSSL_NO_TLSEXT */ 3618 3619 /* Check to see if handshake is full or resumed. Usually this is just a 3620 * case of checking to see if a cache hit has occurred. In the case of 3621 * session tickets we have to check the next message to be sure. 3622 */ 3623 3624 #ifndef OPENSSL_NO_TLSEXT 3625 int ssl3_check_finished(SSL *s) 3626 { 3627 int ok; 3628 long n; 3629 /* If we have no ticket it cannot be a resumed session. */ 3630 if (!s->session->tlsext_tick) 3631 return 1; 3632 /* this function is called when we really expect a Certificate 3633 * message, so permit appropriate message length */ 3634 n=s->method->ssl_get_message(s, 3635 SSL3_ST_CR_CERT_A, 3636 SSL3_ST_CR_CERT_B, 3637 -1, 3638 s->max_cert_list, 3639 &ok); 3640 if (!ok) return((int)n); 3641 s->s3->tmp.reuse_message = 1; 3642 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 3643 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 3644 return 2; 3645 3646 return 1; 3647 } 3648 #endif 3649 3650 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 3651 { 3652 int i = 0; 3653 #ifndef OPENSSL_NO_ENGINE 3654 if (s->ctx->client_cert_engine) 3655 { 3656 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 3657 SSL_get_client_CA_list(s), 3658 px509, ppkey, NULL, NULL, NULL); 3659 if (i != 0) 3660 return i; 3661 } 3662 #endif 3663 if (s->ctx->client_cert_cb) 3664 i = s->ctx->client_cert_cb(s,px509,ppkey); 3665 return i; 3666 } 3667
