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) 1998-2003 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 #include <stdio.h> 126 #include "ssl_locl.h" 127 #include "kssl_lcl.h" 128 #include <openssl/buffer.h> 129 #include <openssl/rand.h> 130 #include <openssl/objects.h> 131 #include <openssl/evp.h> 132 #include <openssl/md5.h> 133 #ifdef OPENSSL_FIPS 134 #include <openssl/fips.h> 135 #endif 136 137 #ifndef OPENSSL_NO_DH 138 #include <openssl/dh.h> 139 #endif 140 #include <openssl/bn.h> 141 #ifndef OPENSSL_NO_ENGINE 142 #include <openssl/engine.h> 143 #endif 144 145 static SSL_METHOD *ssl3_get_client_method(int ver); 146 static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b); 147 148 #ifndef OPENSSL_NO_ECDH 149 static int curve_id2nid(int curve_id); 150 int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs); 151 #endif 152 153 static SSL_METHOD *ssl3_get_client_method(int ver) 154 { 155 if (ver == SSL3_VERSION) 156 return(SSLv3_client_method()); 157 else 158 return(NULL); 159 } 160 161 IMPLEMENT_ssl3_meth_func(SSLv3_client_method, 162 ssl_undefined_function, 163 ssl3_connect, 164 ssl3_get_client_method) 165 166 int ssl3_connect(SSL *s) 167 { 168 BUF_MEM *buf=NULL; 169 unsigned long Time=(unsigned long)time(NULL),l; 170 void (*cb)(const SSL *ssl,int type,int val)=NULL; 171 int ret= -1; 172 int new_state,state,skip=0; 173 174 RAND_add(&Time,sizeof(Time),0); 175 ERR_clear_error(); 176 clear_sys_error(); 177 178 if (s->info_callback != NULL) 179 cb=s->info_callback; 180 else if (s->ctx->info_callback != NULL) 181 cb=s->ctx->info_callback; 182 183 s->in_handshake++; 184 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 185 if (SSL_get_mode(s) & SSL_MODE_HANDSHAKE_CUTTHROUGH) 186 { 187 /* Renegotiation complicates the state machine */ 188 s->s3->flags |= SSL3_FLAGS_NO_RENEGOTIATE_CIPHERS; 189 #if 0 /* Send app data in separate packet, otherwise, some particular site 190 * (only one site so far) closes the socket. 191 * Note: there is a very small chance that two TCP packets 192 * could be arriving at server combined into a single TCP packet, 193 * then trigger that site to break. We haven't encounter that though. 194 */ 195 /* Send app data along with CCS/Finished */ 196 s->s3->flags |= SSL3_FLAGS_DELAY_CLIENT_FINISHED; 197 #endif 198 } 199 200 for (;;) 201 { 202 state=s->state; 203 204 switch(s->state) 205 { 206 case SSL_ST_RENEGOTIATE: 207 s->new_session=1; 208 s->state=SSL_ST_CONNECT; 209 s->ctx->stats.sess_connect_renegotiate++; 210 /* break */ 211 case SSL_ST_BEFORE: 212 case SSL_ST_CONNECT: 213 case SSL_ST_BEFORE|SSL_ST_CONNECT: 214 case SSL_ST_OK|SSL_ST_CONNECT: 215 216 s->server=0; 217 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); 218 219 if ((s->version & 0xff00 ) != 0x0300) 220 { 221 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR); 222 ret = -1; 223 goto end; 224 } 225 226 /* s->version=SSL3_VERSION; */ 227 s->type=SSL_ST_CONNECT; 228 229 if (s->init_buf == NULL) 230 { 231 if ((buf=BUF_MEM_new()) == NULL) 232 { 233 ret= -1; 234 goto end; 235 } 236 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) 237 { 238 ret= -1; 239 goto end; 240 } 241 s->init_buf=buf; 242 buf=NULL; 243 } 244 245 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } 246 247 /* setup buffing BIO */ 248 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; } 249 250 /* don't push the buffering BIO quite yet */ 251 252 ssl3_init_finished_mac(s); 253 254 s->state=SSL3_ST_CW_CLNT_HELLO_A; 255 s->ctx->stats.sess_connect++; 256 s->init_num=0; 257 break; 258 259 case SSL3_ST_CW_CLNT_HELLO_A: 260 case SSL3_ST_CW_CLNT_HELLO_B: 261 262 s->shutdown=0; 263 ret=ssl3_client_hello(s); 264 if (ret <= 0) goto end; 265 s->state=SSL3_ST_CR_SRVR_HELLO_A; 266 s->init_num=0; 267 268 /* turn on buffering for the next lot of output */ 269 if (s->bbio != s->wbio) 270 s->wbio=BIO_push(s->bbio,s->wbio); 271 272 break; 273 274 case SSL3_ST_CR_SRVR_HELLO_A: 275 case SSL3_ST_CR_SRVR_HELLO_B: 276 ret=ssl3_get_server_hello(s); 277 if (ret <= 0) goto end; 278 if (s->hit) 279 s->state=SSL3_ST_CR_FINISHED_A; 280 else 281 s->state=SSL3_ST_CR_CERT_A; 282 s->init_num=0; 283 break; 284 285 case SSL3_ST_CR_CERT_A: 286 case SSL3_ST_CR_CERT_B: 287 #ifndef OPENSSL_NO_TLSEXT 288 ret=ssl3_check_finished(s); 289 if (ret <= 0) goto end; 290 if (ret == 2) 291 { 292 s->hit = 1; 293 if (s->tlsext_ticket_expected) 294 s->state=SSL3_ST_CR_SESSION_TICKET_A; 295 else 296 s->state=SSL3_ST_CR_FINISHED_A; 297 s->init_num=0; 298 break; 299 } 300 #endif 301 /* Check if it is anon DH/ECDH */ 302 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) 303 { 304 ret=ssl3_get_server_certificate(s); 305 if (ret <= 0) goto end; 306 #ifndef OPENSSL_NO_TLSEXT 307 if (s->tlsext_status_expected) 308 s->state=SSL3_ST_CR_CERT_STATUS_A; 309 else 310 s->state=SSL3_ST_CR_KEY_EXCH_A; 311 } 312 else 313 { 314 skip = 1; 315 s->state=SSL3_ST_CR_KEY_EXCH_A; 316 } 317 #else 318 } 319 else 320 skip=1; 321 322 s->state=SSL3_ST_CR_KEY_EXCH_A; 323 #endif 324 s->init_num=0; 325 break; 326 327 case SSL3_ST_CR_KEY_EXCH_A: 328 case SSL3_ST_CR_KEY_EXCH_B: 329 ret=ssl3_get_key_exchange(s); 330 if (ret <= 0) goto end; 331 s->state=SSL3_ST_CR_CERT_REQ_A; 332 s->init_num=0; 333 334 /* at this point we check that we have the 335 * required stuff from the server */ 336 if (!ssl3_check_cert_and_algorithm(s)) 337 { 338 ret= -1; 339 goto end; 340 } 341 break; 342 343 case SSL3_ST_CR_CERT_REQ_A: 344 case SSL3_ST_CR_CERT_REQ_B: 345 ret=ssl3_get_certificate_request(s); 346 if (ret <= 0) goto end; 347 s->state=SSL3_ST_CR_SRVR_DONE_A; 348 s->init_num=0; 349 break; 350 351 case SSL3_ST_CR_SRVR_DONE_A: 352 case SSL3_ST_CR_SRVR_DONE_B: 353 ret=ssl3_get_server_done(s); 354 if (ret <= 0) goto end; 355 if (s->s3->tmp.cert_req) 356 s->state=SSL3_ST_CW_CERT_A; 357 else 358 s->state=SSL3_ST_CW_KEY_EXCH_A; 359 s->init_num=0; 360 361 break; 362 363 case SSL3_ST_CW_CERT_A: 364 case SSL3_ST_CW_CERT_B: 365 case SSL3_ST_CW_CERT_C: 366 case SSL3_ST_CW_CERT_D: 367 ret=ssl3_send_client_certificate(s); 368 if (ret <= 0) goto end; 369 s->state=SSL3_ST_CW_KEY_EXCH_A; 370 s->init_num=0; 371 break; 372 373 case SSL3_ST_CW_KEY_EXCH_A: 374 case SSL3_ST_CW_KEY_EXCH_B: 375 ret=ssl3_send_client_key_exchange(s); 376 if (ret <= 0) goto end; 377 l=s->s3->tmp.new_cipher->algorithms; 378 /* EAY EAY EAY need to check for DH fix cert 379 * sent back */ 380 /* For TLS, cert_req is set to 2, so a cert chain 381 * of nothing is sent, but no verify packet is sent */ 382 /* XXX: For now, we do not support client 383 * authentication in ECDH cipher suites with 384 * ECDH (rather than ECDSA) certificates. 385 * We need to skip the certificate verify 386 * message when client's ECDH public key is sent 387 * inside the client certificate. 388 */ 389 if (s->s3->tmp.cert_req == 1) 390 { 391 s->state=SSL3_ST_CW_CERT_VRFY_A; 392 } 393 else 394 { 395 s->state=SSL3_ST_CW_CHANGE_A; 396 s->s3->change_cipher_spec=0; 397 } 398 399 s->init_num=0; 400 break; 401 402 case SSL3_ST_CW_CERT_VRFY_A: 403 case SSL3_ST_CW_CERT_VRFY_B: 404 ret=ssl3_send_client_verify(s); 405 if (ret <= 0) goto end; 406 s->state=SSL3_ST_CW_CHANGE_A; 407 s->init_num=0; 408 s->s3->change_cipher_spec=0; 409 break; 410 411 case SSL3_ST_CW_CHANGE_A: 412 case SSL3_ST_CW_CHANGE_B: 413 ret=ssl3_send_change_cipher_spec(s, 414 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); 415 if (ret <= 0) goto end; 416 s->state=SSL3_ST_CW_FINISHED_A; 417 s->init_num=0; 418 419 s->session->cipher=s->s3->tmp.new_cipher; 420 #ifdef OPENSSL_NO_COMP 421 s->session->compress_meth=0; 422 #else 423 if (s->s3->tmp.new_compression == NULL) 424 s->session->compress_meth=0; 425 else 426 s->session->compress_meth= 427 s->s3->tmp.new_compression->id; 428 #endif 429 if (!s->method->ssl3_enc->setup_key_block(s)) 430 { 431 ret= -1; 432 goto end; 433 } 434 435 if (!s->method->ssl3_enc->change_cipher_state(s, 436 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 437 { 438 ret= -1; 439 goto end; 440 } 441 442 break; 443 444 case SSL3_ST_CW_FINISHED_A: 445 case SSL3_ST_CW_FINISHED_B: 446 ret=ssl3_send_finished(s, 447 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, 448 s->method->ssl3_enc->client_finished_label, 449 s->method->ssl3_enc->client_finished_label_len); 450 if (ret <= 0) goto end; 451 s->state=SSL3_ST_CW_FLUSH; 452 453 /* clear flags */ 454 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; 455 if (s->hit) 456 { 457 s->s3->tmp.next_state=SSL_ST_OK; 458 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 459 { 460 s->state=SSL_ST_OK; 461 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 462 s->s3->delay_buf_pop_ret=0; 463 } 464 } 465 else 466 { 467 if ((SSL_get_mode(s) & SSL_MODE_HANDSHAKE_CUTTHROUGH) && SSL_get_cipher_bits(s, NULL) >= 128) 468 { 469 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 470 { 471 s->state=SSL3_ST_CUTTHROUGH_COMPLETE; 472 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 473 s->s3->delay_buf_pop_ret=0; 474 } 475 else 476 { 477 s->s3->tmp.next_state=SSL3_ST_CUTTHROUGH_COMPLETE; 478 } 479 } 480 else 481 { 482 #ifndef OPENSSL_NO_TLSEXT 483 /* Allow NewSessionTicket if ticket expected */ 484 if (s->tlsext_ticket_expected) 485 s->s3->tmp.next_state=SSL3_ST_CR_SESSION_TICKET_A; 486 else 487 #endif 488 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; 489 } 490 } 491 s->init_num=0; 492 break; 493 494 #ifndef OPENSSL_NO_TLSEXT 495 case SSL3_ST_CR_SESSION_TICKET_A: 496 case SSL3_ST_CR_SESSION_TICKET_B: 497 ret=ssl3_get_new_session_ticket(s); 498 if (ret <= 0) goto end; 499 s->state=SSL3_ST_CR_FINISHED_A; 500 s->init_num=0; 501 break; 502 503 case SSL3_ST_CR_CERT_STATUS_A: 504 case SSL3_ST_CR_CERT_STATUS_B: 505 ret=ssl3_get_cert_status(s); 506 if (ret <= 0) goto end; 507 s->state=SSL3_ST_CR_KEY_EXCH_A; 508 s->init_num=0; 509 break; 510 #endif 511 512 case SSL3_ST_CR_FINISHED_A: 513 case SSL3_ST_CR_FINISHED_B: 514 515 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, 516 SSL3_ST_CR_FINISHED_B); 517 if (ret <= 0) goto end; 518 519 if (s->hit) 520 s->state=SSL3_ST_CW_CHANGE_A; 521 else 522 s->state=SSL_ST_OK; 523 s->init_num=0; 524 break; 525 526 case SSL3_ST_CW_FLUSH: 527 s->rwstate=SSL_WRITING; 528 if (BIO_flush(s->wbio) <= 0) 529 { 530 ret= -1; 531 goto end; 532 } 533 s->rwstate=SSL_NOTHING; 534 s->state=s->s3->tmp.next_state; 535 break; 536 537 case SSL3_ST_CUTTHROUGH_COMPLETE: 538 #ifndef OPENSSL_NO_TLSEXT 539 /* Allow NewSessionTicket if ticket expected */ 540 if (s->tlsext_ticket_expected) 541 s->state=SSL3_ST_CR_SESSION_TICKET_A; 542 else 543 #endif 544 s->state=SSL3_ST_CR_FINISHED_A; 545 546 /* SSL_write() will take care of flushing buffered data if 547 * DELAY_CLIENT_FINISHED is set. 548 */ 549 if (!(s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED)) 550 ssl_free_wbio_buffer(s); 551 ret = 1; 552 goto end; 553 /* break; */ 554 555 case SSL_ST_OK: 556 /* clean a few things up */ 557 ssl3_cleanup_key_block(s); 558 559 if (s->init_buf != NULL) 560 { 561 BUF_MEM_free(s->init_buf); 562 s->init_buf=NULL; 563 } 564 565 /* If we are not 'joining' the last two packets, 566 * remove the buffering now */ 567 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 568 ssl_free_wbio_buffer(s); 569 /* else do it later in ssl3_write */ 570 571 s->init_num=0; 572 s->new_session=0; 573 574 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 575 if (s->hit) s->ctx->stats.sess_hit++; 576 577 ret=1; 578 /* s->server=0; */ 579 s->handshake_func=ssl3_connect; 580 s->ctx->stats.sess_connect_good++; 581 582 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 583 584 goto end; 585 /* break; */ 586 587 default: 588 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); 589 ret= -1; 590 goto end; 591 /* break; */ 592 } 593 594 /* did we do anything */ 595 if (!s->s3->tmp.reuse_message && !skip) 596 { 597 if (s->debug) 598 { 599 if ((ret=BIO_flush(s->wbio)) <= 0) 600 goto end; 601 } 602 603 if ((cb != NULL) && (s->state != state)) 604 { 605 new_state=s->state; 606 s->state=state; 607 cb(s,SSL_CB_CONNECT_LOOP,1); 608 s->state=new_state; 609 } 610 } 611 skip=0; 612 } 613 end: 614 s->in_handshake--; 615 if (buf != NULL) 616 BUF_MEM_free(buf); 617 if (cb != NULL) 618 cb(s,SSL_CB_CONNECT_EXIT,ret); 619 return(ret); 620 } 621 622 623 int ssl3_client_hello(SSL *s) 624 { 625 unsigned char *buf; 626 unsigned char *p,*d; 627 int i; 628 unsigned long Time,l; 629 #ifndef OPENSSL_NO_COMP 630 int j; 631 SSL_COMP *comp; 632 #endif 633 634 buf=(unsigned char *)s->init_buf->data; 635 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) 636 { 637 SSL_SESSION *sess = s->session; 638 if ((sess == NULL) || 639 (sess->ssl_version != s->version) || 640 #ifdef OPENSSL_NO_TLSEXT 641 !sess->session_id_length || 642 #else 643 (!sess->session_id_length && !sess->tlsext_tick) || 644 #endif 645 (sess->not_resumable)) 646 { 647 if (!ssl_get_new_session(s,0)) 648 goto err; 649 } 650 /* else use the pre-loaded session */ 651 652 p=s->s3->client_random; 653 Time=(unsigned long)time(NULL); /* Time */ 654 l2n(Time,p); 655 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) 656 goto err; 657 658 /* Do the message type and length last */ 659 d=p= &(buf[4]); 660 661 *(p++)=s->version>>8; 662 *(p++)=s->version&0xff; 663 s->client_version=s->version; 664 665 /* Random stuff */ 666 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 667 p+=SSL3_RANDOM_SIZE; 668 669 /* Session ID */ 670 if (s->new_session) 671 i=0; 672 else 673 i=s->session->session_id_length; 674 *(p++)=i; 675 if (i != 0) 676 { 677 if (i > (int)sizeof(s->session->session_id)) 678 { 679 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 680 goto err; 681 } 682 memcpy(p,s->session->session_id,i); 683 p+=i; 684 } 685 686 /* Ciphers supported */ 687 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); 688 if (i == 0) 689 { 690 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 691 goto err; 692 } 693 s2n(i,p); 694 p+=i; 695 696 /* COMPRESSION */ 697 #ifdef OPENSSL_NO_COMP 698 *(p++)=1; 699 #else 700 if (s->ctx->comp_methods == NULL) 701 j=0; 702 else 703 j=sk_SSL_COMP_num(s->ctx->comp_methods); 704 *(p++)=1+j; 705 for (i=0; i<j; i++) 706 { 707 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 708 *(p++)=comp->id; 709 } 710 #endif 711 *(p++)=0; /* Add the NULL method */ 712 #ifndef OPENSSL_NO_TLSEXT 713 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL) 714 { 715 SSLerr(SSL_F_SSL3_CLIENT_HELLO,ERR_R_INTERNAL_ERROR); 716 goto err; 717 } 718 #endif 719 l=(p-d); 720 d=buf; 721 *(d++)=SSL3_MT_CLIENT_HELLO; 722 l2n3(l,d); 723 724 s->state=SSL3_ST_CW_CLNT_HELLO_B; 725 /* number of bytes to write */ 726 s->init_num=p-buf; 727 s->init_off=0; 728 } 729 730 /* SSL3_ST_CW_CLNT_HELLO_B */ 731 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 732 err: 733 return(-1); 734 } 735 736 int ssl3_get_server_hello(SSL *s) 737 { 738 STACK_OF(SSL_CIPHER) *sk; 739 SSL_CIPHER *c; 740 unsigned char *p,*d; 741 int i,al,ok; 742 unsigned int j; 743 long n; 744 #ifndef OPENSSL_NO_COMP 745 SSL_COMP *comp; 746 #endif 747 748 n=s->method->ssl_get_message(s, 749 SSL3_ST_CR_SRVR_HELLO_A, 750 SSL3_ST_CR_SRVR_HELLO_B, 751 -1, 752 20000, /* ?? */ 753 &ok); 754 755 if (!ok) return((int)n); 756 757 if ( SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 758 { 759 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) 760 { 761 if ( s->d1->send_cookie == 0) 762 { 763 s->s3->tmp.reuse_message = 1; 764 return 1; 765 } 766 else /* already sent a cookie */ 767 { 768 al=SSL_AD_UNEXPECTED_MESSAGE; 769 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 770 goto f_err; 771 } 772 } 773 } 774 775 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) 776 { 777 al=SSL_AD_UNEXPECTED_MESSAGE; 778 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 779 goto f_err; 780 } 781 782 d=p=(unsigned char *)s->init_msg; 783 784 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 785 { 786 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 787 s->version=(s->version&0xff00)|p[1]; 788 al=SSL_AD_PROTOCOL_VERSION; 789 goto f_err; 790 } 791 p+=2; 792 793 /* load the server hello data */ 794 /* load the server random */ 795 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 796 p+=SSL3_RANDOM_SIZE; 797 798 /* get the session-id */ 799 j= *(p++); 800 801 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 802 { 803 al=SSL_AD_ILLEGAL_PARAMETER; 804 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 805 goto f_err; 806 } 807 808 if (j != 0 && j == s->session->session_id_length 809 && memcmp(p,s->session->session_id,j) == 0) 810 { 811 if(s->sid_ctx_length != s->session->sid_ctx_length 812 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 813 { 814 /* actually a client application bug */ 815 al=SSL_AD_ILLEGAL_PARAMETER; 816 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 817 goto f_err; 818 } 819 s->hit=1; 820 } 821 else /* a miss or crap from the other end */ 822 { 823 /* If we were trying for session-id reuse, make a new 824 * SSL_SESSION so we don't stuff up other people */ 825 s->hit=0; 826 if (s->session->session_id_length > 0) 827 { 828 if (!ssl_get_new_session(s,0)) 829 { 830 al=SSL_AD_INTERNAL_ERROR; 831 goto f_err; 832 } 833 } 834 s->session->session_id_length=j; 835 memcpy(s->session->session_id,p,j); /* j could be 0 */ 836 } 837 p+=j; 838 c=ssl_get_cipher_by_char(s,p); 839 if (c == NULL) 840 { 841 /* unknown cipher */ 842 al=SSL_AD_ILLEGAL_PARAMETER; 843 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 844 goto f_err; 845 } 846 p+=ssl_put_cipher_by_char(s,NULL,NULL); 847 848 sk=ssl_get_ciphers_by_id(s); 849 i=sk_SSL_CIPHER_find(sk,c); 850 if (i < 0) 851 { 852 /* we did not say we would use this cipher */ 853 al=SSL_AD_ILLEGAL_PARAMETER; 854 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 855 goto f_err; 856 } 857 858 /* Depending on the session caching (internal/external), the cipher 859 and/or cipher_id values may not be set. Make sure that 860 cipher_id is set and use it for comparison. */ 861 if (s->session->cipher) 862 s->session->cipher_id = s->session->cipher->id; 863 if (s->hit && (s->session->cipher_id != c->id)) 864 { 865 if (!(s->options & 866 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 867 { 868 al=SSL_AD_ILLEGAL_PARAMETER; 869 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 870 goto f_err; 871 } 872 } 873 s->s3->tmp.new_cipher=c; 874 875 /* lets get the compression algorithm */ 876 /* COMPRESSION */ 877 #ifdef OPENSSL_NO_COMP 878 if (*(p++) != 0) 879 { 880 al=SSL_AD_ILLEGAL_PARAMETER; 881 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 882 goto f_err; 883 } 884 #else 885 j= *(p++); 886 if (j == 0) 887 comp=NULL; 888 else 889 comp=ssl3_comp_find(s->ctx->comp_methods,j); 890 891 if ((j != 0) && (comp == NULL)) 892 { 893 al=SSL_AD_ILLEGAL_PARAMETER; 894 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 895 goto f_err; 896 } 897 else 898 { 899 s->s3->tmp.new_compression=comp; 900 } 901 #endif 902 #ifndef OPENSSL_NO_TLSEXT 903 /* TLS extensions*/ 904 if (s->version >= SSL3_VERSION) 905 { 906 if (!ssl_parse_serverhello_tlsext(s,&p,d,n, &al)) 907 { 908 /* 'al' set by ssl_parse_serverhello_tlsext */ 909 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_PARSE_TLSEXT); 910 goto f_err; 911 } 912 if (ssl_check_serverhello_tlsext(s) <= 0) 913 { 914 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SERVERHELLO_TLSEXT); 915 goto err; 916 } 917 } 918 #endif 919 920 921 if (p != (d+n)) 922 { 923 /* wrong packet length */ 924 al=SSL_AD_DECODE_ERROR; 925 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 926 goto err; 927 } 928 929 return(1); 930 f_err: 931 ssl3_send_alert(s,SSL3_AL_FATAL,al); 932 err: 933 return(-1); 934 } 935 936 int ssl3_get_server_certificate(SSL *s) 937 { 938 int al,i,ok,ret= -1; 939 unsigned long n,nc,llen,l; 940 X509 *x=NULL; 941 const unsigned char *q,*p; 942 unsigned char *d; 943 STACK_OF(X509) *sk=NULL; 944 SESS_CERT *sc; 945 EVP_PKEY *pkey=NULL; 946 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 947 948 n=s->method->ssl_get_message(s, 949 SSL3_ST_CR_CERT_A, 950 SSL3_ST_CR_CERT_B, 951 -1, 952 s->max_cert_list, 953 &ok); 954 955 if (!ok) return((int)n); 956 957 if ((s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) || 958 ((s->s3->tmp.new_cipher->algorithms & SSL_aKRB5) && 959 (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE))) 960 { 961 s->s3->tmp.reuse_message=1; 962 return(1); 963 } 964 965 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 966 { 967 al=SSL_AD_UNEXPECTED_MESSAGE; 968 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 969 goto f_err; 970 } 971 p=d=(unsigned char *)s->init_msg; 972 973 if ((sk=sk_X509_new_null()) == NULL) 974 { 975 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 976 goto err; 977 } 978 979 n2l3(p,llen); 980 if (llen+3 != n) 981 { 982 al=SSL_AD_DECODE_ERROR; 983 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 984 goto f_err; 985 } 986 for (nc=0; nc<llen; ) 987 { 988 n2l3(p,l); 989 if ((l+nc+3) > llen) 990 { 991 al=SSL_AD_DECODE_ERROR; 992 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 993 goto f_err; 994 } 995 996 q=p; 997 x=d2i_X509(NULL,&q,l); 998 if (x == NULL) 999 { 1000 al=SSL_AD_BAD_CERTIFICATE; 1001 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 1002 goto f_err; 1003 } 1004 if (q != (p+l)) 1005 { 1006 al=SSL_AD_DECODE_ERROR; 1007 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 1008 goto f_err; 1009 } 1010 if (!sk_X509_push(sk,x)) 1011 { 1012 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 1013 goto err; 1014 } 1015 x=NULL; 1016 nc+=l+3; 1017 p=q; 1018 } 1019 1020 i=ssl_verify_cert_chain(s,sk); 1021 if ((s->verify_mode != SSL_VERIFY_NONE) && (i <= 0) 1022 #ifndef OPENSSL_NO_KRB5 1023 && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK)) 1024 != (SSL_aKRB5|SSL_kKRB5) 1025 #endif /* OPENSSL_NO_KRB5 */ 1026 ) 1027 { 1028 al=ssl_verify_alarm_type(s->verify_result); 1029 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 1030 goto f_err; 1031 } 1032 ERR_clear_error(); /* but we keep s->verify_result */ 1033 1034 sc=ssl_sess_cert_new(); 1035 if (sc == NULL) goto err; 1036 1037 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 1038 s->session->sess_cert=sc; 1039 1040 sc->cert_chain=sk; 1041 /* Inconsistency alert: cert_chain does include the peer's 1042 * certificate, which we don't include in s3_srvr.c */ 1043 x=sk_X509_value(sk,0); 1044 sk=NULL; 1045 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 1046 1047 pkey=X509_get_pubkey(x); 1048 1049 /* VRS: allow null cert if auth == KRB5 */ 1050 need_cert = ((s->s3->tmp.new_cipher->algorithms 1051 & (SSL_MKEY_MASK|SSL_AUTH_MASK)) 1052 == (SSL_aKRB5|SSL_kKRB5))? 0: 1; 1053 1054 #ifdef KSSL_DEBUG 1055 printf("pkey,x = %p, %p\n", (void *)pkey,(void *)x); 1056 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 1057 printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name, 1058 s->s3->tmp.new_cipher->algorithms, need_cert); 1059 #endif /* KSSL_DEBUG */ 1060 1061 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 1062 { 1063 x=NULL; 1064 al=SSL3_AL_FATAL; 1065 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1066 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 1067 goto f_err; 1068 } 1069 1070 i=ssl_cert_type(x,pkey); 1071 if (need_cert && i < 0) 1072 { 1073 x=NULL; 1074 al=SSL3_AL_FATAL; 1075 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 1076 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 1077 goto f_err; 1078 } 1079 1080 if (need_cert) 1081 { 1082 sc->peer_cert_type=i; 1083 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1084 /* Why would the following ever happen? 1085 * We just created sc a couple of lines ago. */ 1086 if (sc->peer_pkeys[i].x509 != NULL) 1087 X509_free(sc->peer_pkeys[i].x509); 1088 sc->peer_pkeys[i].x509=x; 1089 sc->peer_key= &(sc->peer_pkeys[i]); 1090 1091 if (s->session->peer != NULL) 1092 X509_free(s->session->peer); 1093 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 1094 s->session->peer=x; 1095 } 1096 else 1097 { 1098 sc->peer_cert_type=i; 1099 sc->peer_key= NULL; 1100 1101 if (s->session->peer != NULL) 1102 X509_free(s->session->peer); 1103 s->session->peer=NULL; 1104 } 1105 s->session->verify_result = s->verify_result; 1106 1107 x=NULL; 1108 ret=1; 1109 1110 if (0) 1111 { 1112 f_err: 1113 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1114 } 1115 err: 1116 EVP_PKEY_free(pkey); 1117 X509_free(x); 1118 sk_X509_pop_free(sk,X509_free); 1119 return(ret); 1120 } 1121 1122 int ssl3_get_key_exchange(SSL *s) 1123 { 1124 #ifndef OPENSSL_NO_RSA 1125 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 1126 #endif 1127 EVP_MD_CTX md_ctx; 1128 unsigned char *param,*p; 1129 int al,i,j,param_len,ok; 1130 long n,alg; 1131 EVP_PKEY *pkey=NULL; 1132 #ifndef OPENSSL_NO_RSA 1133 RSA *rsa=NULL; 1134 #endif 1135 #ifndef OPENSSL_NO_DH 1136 DH *dh=NULL; 1137 #endif 1138 #ifndef OPENSSL_NO_ECDH 1139 EC_KEY *ecdh = NULL; 1140 BN_CTX *bn_ctx = NULL; 1141 EC_POINT *srvr_ecpoint = NULL; 1142 int curve_nid = 0; 1143 int encoded_pt_len = 0; 1144 #endif 1145 1146 /* use same message size as in ssl3_get_certificate_request() 1147 * as ServerKeyExchange message may be skipped */ 1148 n=s->method->ssl_get_message(s, 1149 SSL3_ST_CR_KEY_EXCH_A, 1150 SSL3_ST_CR_KEY_EXCH_B, 1151 -1, 1152 s->max_cert_list, 1153 &ok); 1154 1155 if (!ok) return((int)n); 1156 1157 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 1158 { 1159 s->s3->tmp.reuse_message=1; 1160 return(1); 1161 } 1162 1163 param=p=(unsigned char *)s->init_msg; 1164 1165 if (s->session->sess_cert != NULL) 1166 { 1167 #ifndef OPENSSL_NO_RSA 1168 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1169 { 1170 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1171 s->session->sess_cert->peer_rsa_tmp=NULL; 1172 } 1173 #endif 1174 #ifndef OPENSSL_NO_DH 1175 if (s->session->sess_cert->peer_dh_tmp) 1176 { 1177 DH_free(s->session->sess_cert->peer_dh_tmp); 1178 s->session->sess_cert->peer_dh_tmp=NULL; 1179 } 1180 #endif 1181 #ifndef OPENSSL_NO_ECDH 1182 if (s->session->sess_cert->peer_ecdh_tmp) 1183 { 1184 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1185 s->session->sess_cert->peer_ecdh_tmp=NULL; 1186 } 1187 #endif 1188 } 1189 else 1190 { 1191 s->session->sess_cert=ssl_sess_cert_new(); 1192 } 1193 1194 param_len=0; 1195 alg=s->s3->tmp.new_cipher->algorithms; 1196 EVP_MD_CTX_init(&md_ctx); 1197 1198 #ifndef OPENSSL_NO_RSA 1199 if (alg & SSL_kRSA) 1200 { 1201 if ((rsa=RSA_new()) == NULL) 1202 { 1203 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1204 goto err; 1205 } 1206 n2s(p,i); 1207 param_len=i+2; 1208 if (param_len > n) 1209 { 1210 al=SSL_AD_DECODE_ERROR; 1211 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1212 goto f_err; 1213 } 1214 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1215 { 1216 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1217 goto err; 1218 } 1219 p+=i; 1220 1221 n2s(p,i); 1222 param_len+=i+2; 1223 if (param_len > n) 1224 { 1225 al=SSL_AD_DECODE_ERROR; 1226 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1227 goto f_err; 1228 } 1229 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1230 { 1231 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1232 goto err; 1233 } 1234 p+=i; 1235 n-=param_len; 1236 1237 /* this should be because we are using an export cipher */ 1238 if (alg & SSL_aRSA) 1239 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1240 else 1241 { 1242 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1243 goto err; 1244 } 1245 s->session->sess_cert->peer_rsa_tmp=rsa; 1246 rsa=NULL; 1247 } 1248 #else /* OPENSSL_NO_RSA */ 1249 if (0) 1250 ; 1251 #endif 1252 #ifndef OPENSSL_NO_DH 1253 else if (alg & SSL_kEDH) 1254 { 1255 if ((dh=DH_new()) == NULL) 1256 { 1257 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1258 goto err; 1259 } 1260 n2s(p,i); 1261 param_len=i+2; 1262 if (param_len > n) 1263 { 1264 al=SSL_AD_DECODE_ERROR; 1265 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1266 goto f_err; 1267 } 1268 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1269 { 1270 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1271 goto err; 1272 } 1273 p+=i; 1274 1275 n2s(p,i); 1276 param_len+=i+2; 1277 if (param_len > n) 1278 { 1279 al=SSL_AD_DECODE_ERROR; 1280 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1281 goto f_err; 1282 } 1283 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1284 { 1285 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1286 goto err; 1287 } 1288 p+=i; 1289 1290 n2s(p,i); 1291 param_len+=i+2; 1292 if (param_len > n) 1293 { 1294 al=SSL_AD_DECODE_ERROR; 1295 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1296 goto f_err; 1297 } 1298 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1299 { 1300 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1301 goto err; 1302 } 1303 p+=i; 1304 n-=param_len; 1305 1306 #ifndef OPENSSL_NO_RSA 1307 if (alg & SSL_aRSA) 1308 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1309 #else 1310 if (0) 1311 ; 1312 #endif 1313 #ifndef OPENSSL_NO_DSA 1314 else if (alg & SSL_aDSS) 1315 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1316 #endif 1317 /* else anonymous DH, so no certificate or pkey. */ 1318 1319 s->session->sess_cert->peer_dh_tmp=dh; 1320 dh=NULL; 1321 } 1322 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd)) 1323 { 1324 al=SSL_AD_ILLEGAL_PARAMETER; 1325 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1326 goto f_err; 1327 } 1328 #endif /* !OPENSSL_NO_DH */ 1329 1330 #ifndef OPENSSL_NO_ECDH 1331 else if (alg & SSL_kECDHE) 1332 { 1333 EC_GROUP *ngroup; 1334 const EC_GROUP *group; 1335 1336 if ((ecdh=EC_KEY_new()) == NULL) 1337 { 1338 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1339 goto err; 1340 } 1341 1342 /* Extract elliptic curve parameters and the 1343 * server's ephemeral ECDH public key. 1344 * Keep accumulating lengths of various components in 1345 * param_len and make sure it never exceeds n. 1346 */ 1347 1348 /* XXX: For now we only support named (not generic) curves 1349 * and the ECParameters in this case is just three bytes. 1350 */ 1351 param_len=3; 1352 if ((param_len > n) || 1353 (*p != NAMED_CURVE_TYPE) || 1354 ((curve_nid = curve_id2nid(*(p + 2))) == 0)) 1355 { 1356 al=SSL_AD_INTERNAL_ERROR; 1357 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1358 goto f_err; 1359 } 1360 1361 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1362 if (ngroup == NULL) 1363 { 1364 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1365 goto err; 1366 } 1367 if (EC_KEY_set_group(ecdh, ngroup) == 0) 1368 { 1369 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1370 goto err; 1371 } 1372 EC_GROUP_free(ngroup); 1373 1374 group = EC_KEY_get0_group(ecdh); 1375 1376 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1377 (EC_GROUP_get_degree(group) > 163)) 1378 { 1379 al=SSL_AD_EXPORT_RESTRICTION; 1380 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1381 goto f_err; 1382 } 1383 1384 p+=3; 1385 1386 /* Next, get the encoded ECPoint */ 1387 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1388 ((bn_ctx = BN_CTX_new()) == NULL)) 1389 { 1390 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1391 goto err; 1392 } 1393 1394 encoded_pt_len = *p; /* length of encoded point */ 1395 p+=1; 1396 param_len += (1 + encoded_pt_len); 1397 if ((param_len > n) || 1398 (EC_POINT_oct2point(group, srvr_ecpoint, 1399 p, encoded_pt_len, bn_ctx) == 0)) 1400 { 1401 al=SSL_AD_DECODE_ERROR; 1402 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT); 1403 goto f_err; 1404 } 1405 1406 n-=param_len; 1407 p+=encoded_pt_len; 1408 1409 /* The ECC/TLS specification does not mention 1410 * the use of DSA to sign ECParameters in the server 1411 * key exchange message. We do support RSA and ECDSA. 1412 */ 1413 if (0) ; 1414 #ifndef OPENSSL_NO_RSA 1415 else if (alg & SSL_aRSA) 1416 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1417 #endif 1418 #ifndef OPENSSL_NO_ECDSA 1419 else if (alg & SSL_aECDSA) 1420 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1421 #endif 1422 /* else anonymous ECDH, so no certificate or pkey. */ 1423 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1424 s->session->sess_cert->peer_ecdh_tmp=ecdh; 1425 ecdh=NULL; 1426 BN_CTX_free(bn_ctx); 1427 EC_POINT_free(srvr_ecpoint); 1428 srvr_ecpoint = NULL; 1429 } 1430 else if (alg & SSL_kECDH) 1431 { 1432 al=SSL_AD_UNEXPECTED_MESSAGE; 1433 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1434 goto f_err; 1435 } 1436 #endif /* !OPENSSL_NO_ECDH */ 1437 if (alg & SSL_aFZA) 1438 { 1439 al=SSL_AD_HANDSHAKE_FAILURE; 1440 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1441 goto f_err; 1442 } 1443 1444 1445 /* p points to the next byte, there are 'n' bytes left */ 1446 1447 /* if it was signed, check the signature */ 1448 if (pkey != NULL) 1449 { 1450 n2s(p,i); 1451 n-=2; 1452 j=EVP_PKEY_size(pkey); 1453 1454 if ((i != n) || (n > j) || (n <= 0)) 1455 { 1456 /* wrong packet length */ 1457 al=SSL_AD_DECODE_ERROR; 1458 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1459 goto f_err; 1460 } 1461 1462 #ifndef OPENSSL_NO_RSA 1463 if (pkey->type == EVP_PKEY_RSA) 1464 { 1465 int num; 1466 1467 j=0; 1468 q=md_buf; 1469 for (num=2; num > 0; num--) 1470 { 1471 EVP_MD_CTX_set_flags(&md_ctx, 1472 EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); 1473 EVP_DigestInit_ex(&md_ctx,(num == 2) 1474 ?s->ctx->md5:s->ctx->sha1, NULL); 1475 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1476 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1477 EVP_DigestUpdate(&md_ctx,param,param_len); 1478 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i); 1479 q+=i; 1480 j+=i; 1481 } 1482 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1483 pkey->pkey.rsa); 1484 if (i < 0) 1485 { 1486 al=SSL_AD_DECRYPT_ERROR; 1487 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1488 goto f_err; 1489 } 1490 if (i == 0) 1491 { 1492 /* bad signature */ 1493 al=SSL_AD_DECRYPT_ERROR; 1494 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1495 goto f_err; 1496 } 1497 } 1498 else 1499 #endif 1500 #ifndef OPENSSL_NO_DSA 1501 if (pkey->type == EVP_PKEY_DSA) 1502 { 1503 /* lets do DSS */ 1504 EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL); 1505 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1506 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1507 EVP_VerifyUpdate(&md_ctx,param,param_len); 1508 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1509 { 1510 /* bad signature */ 1511 al=SSL_AD_DECRYPT_ERROR; 1512 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1513 goto f_err; 1514 } 1515 } 1516 else 1517 #endif 1518 #ifndef OPENSSL_NO_ECDSA 1519 if (pkey->type == EVP_PKEY_EC) 1520 { 1521 /* let's do ECDSA */ 1522 EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL); 1523 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1524 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1525 EVP_VerifyUpdate(&md_ctx,param,param_len); 1526 if (EVP_VerifyFinal(&md_ctx,p,(int)n,pkey) <= 0) 1527 { 1528 /* bad signature */ 1529 al=SSL_AD_DECRYPT_ERROR; 1530 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1531 goto f_err; 1532 } 1533 } 1534 else 1535 #endif 1536 { 1537 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1538 goto err; 1539 } 1540 } 1541 else 1542 { 1543 /* still data left over */ 1544 if (!(alg & SSL_aNULL)) 1545 { 1546 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1547 goto err; 1548 } 1549 if (n != 0) 1550 { 1551 al=SSL_AD_DECODE_ERROR; 1552 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1553 goto f_err; 1554 } 1555 } 1556 EVP_PKEY_free(pkey); 1557 EVP_MD_CTX_cleanup(&md_ctx); 1558 return(1); 1559 f_err: 1560 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1561 err: 1562 EVP_PKEY_free(pkey); 1563 #ifndef OPENSSL_NO_RSA 1564 if (rsa != NULL) 1565 RSA_free(rsa); 1566 #endif 1567 #ifndef OPENSSL_NO_DH 1568 if (dh != NULL) 1569 DH_free(dh); 1570 #endif 1571 #ifndef OPENSSL_NO_ECDH 1572 BN_CTX_free(bn_ctx); 1573 EC_POINT_free(srvr_ecpoint); 1574 if (ecdh != NULL) 1575 EC_KEY_free(ecdh); 1576 #endif 1577 EVP_MD_CTX_cleanup(&md_ctx); 1578 return(-1); 1579 } 1580 1581 int ssl3_get_certificate_request(SSL *s) 1582 { 1583 int ok,ret=0; 1584 unsigned long n,nc,l; 1585 unsigned int llen,ctype_num,i; 1586 X509_NAME *xn=NULL; 1587 const unsigned char *p,*q; 1588 unsigned char *d; 1589 STACK_OF(X509_NAME) *ca_sk=NULL; 1590 1591 n=s->method->ssl_get_message(s, 1592 SSL3_ST_CR_CERT_REQ_A, 1593 SSL3_ST_CR_CERT_REQ_B, 1594 -1, 1595 s->max_cert_list, 1596 &ok); 1597 1598 if (!ok) return((int)n); 1599 1600 s->s3->tmp.cert_req=0; 1601 1602 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 1603 { 1604 s->s3->tmp.reuse_message=1; 1605 return(1); 1606 } 1607 1608 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 1609 { 1610 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1611 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 1612 goto err; 1613 } 1614 1615 /* TLS does not like anon-DH with client cert */ 1616 if (s->version > SSL3_VERSION) 1617 { 1618 l=s->s3->tmp.new_cipher->algorithms; 1619 if (l & SSL_aNULL) 1620 { 1621 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1622 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1623 goto err; 1624 } 1625 } 1626 1627 p=d=(unsigned char *)s->init_msg; 1628 1629 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 1630 { 1631 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1632 goto err; 1633 } 1634 1635 /* get the certificate types */ 1636 ctype_num= *(p++); 1637 if (ctype_num > SSL3_CT_NUMBER) 1638 ctype_num=SSL3_CT_NUMBER; 1639 for (i=0; i<ctype_num; i++) 1640 s->s3->tmp.ctype[i]= p[i]; 1641 p+=ctype_num; 1642 1643 /* get the CA RDNs */ 1644 n2s(p,llen); 1645 #if 0 1646 { 1647 FILE *out; 1648 out=fopen("/tmp/vsign.der","w"); 1649 fwrite(p,1,llen,out); 1650 fclose(out); 1651 } 1652 #endif 1653 1654 if ((llen+ctype_num+2+1) != n) 1655 { 1656 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1657 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 1658 goto err; 1659 } 1660 1661 for (nc=0; nc<llen; ) 1662 { 1663 n2s(p,l); 1664 if ((l+nc+2) > llen) 1665 { 1666 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 1667 goto cont; /* netscape bugs */ 1668 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1669 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 1670 goto err; 1671 } 1672 1673 q=p; 1674 1675 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 1676 { 1677 /* If netscape tolerance is on, ignore errors */ 1678 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 1679 goto cont; 1680 else 1681 { 1682 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1683 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 1684 goto err; 1685 } 1686 } 1687 1688 if (q != (p+l)) 1689 { 1690 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1691 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 1692 goto err; 1693 } 1694 if (!sk_X509_NAME_push(ca_sk,xn)) 1695 { 1696 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1697 goto err; 1698 } 1699 1700 p+=l; 1701 nc+=l+2; 1702 } 1703 1704 if (0) 1705 { 1706 cont: 1707 ERR_clear_error(); 1708 } 1709 1710 /* we should setup a certificate to return.... */ 1711 s->s3->tmp.cert_req=1; 1712 s->s3->tmp.ctype_num=ctype_num; 1713 if (s->s3->tmp.ca_names != NULL) 1714 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 1715 s->s3->tmp.ca_names=ca_sk; 1716 ca_sk=NULL; 1717 1718 ret=1; 1719 err: 1720 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 1721 return(ret); 1722 } 1723 1724 static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 1725 { 1726 return(X509_NAME_cmp(*a,*b)); 1727 } 1728 #ifndef OPENSSL_NO_TLSEXT 1729 int ssl3_get_new_session_ticket(SSL *s) 1730 { 1731 int ok,al,ret=0, ticklen; 1732 long n; 1733 const unsigned char *p; 1734 unsigned char *d; 1735 1736 n=s->method->ssl_get_message(s, 1737 SSL3_ST_CR_SESSION_TICKET_A, 1738 SSL3_ST_CR_SESSION_TICKET_B, 1739 -1, 1740 16384, 1741 &ok); 1742 1743 if (!ok) 1744 return((int)n); 1745 1746 if (s->s3->tmp.message_type == SSL3_MT_FINISHED) 1747 { 1748 s->s3->tmp.reuse_message=1; 1749 return(1); 1750 } 1751 if (s->s3->tmp.message_type != SSL3_MT_NEWSESSION_TICKET) 1752 { 1753 al=SSL_AD_UNEXPECTED_MESSAGE; 1754 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_BAD_MESSAGE_TYPE); 1755 goto f_err; 1756 } 1757 if (n < 6) 1758 { 1759 /* need at least ticket_lifetime_hint + ticket length */ 1760 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR; 1761 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 1762 goto f_err; 1763 } 1764 1765 p=d=(unsigned char *)s->init_msg; 1766 n2l(p, s->session->tlsext_tick_lifetime_hint); 1767 n2s(p, ticklen); 1768 /* ticket_lifetime_hint + ticket_length + ticket */ 1769 if (ticklen + 6 != n) 1770 { 1771 al = SSL3_AL_FATAL,SSL_AD_DECODE_ERROR; 1772 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,SSL_R_LENGTH_MISMATCH); 1773 goto f_err; 1774 } 1775 if (s->session->tlsext_tick) 1776 { 1777 OPENSSL_free(s->session->tlsext_tick); 1778 s->session->tlsext_ticklen = 0; 1779 } 1780 s->session->tlsext_tick = OPENSSL_malloc(ticklen); 1781 if (!s->session->tlsext_tick) 1782 { 1783 SSLerr(SSL_F_SSL3_GET_NEW_SESSION_TICKET,ERR_R_MALLOC_FAILURE); 1784 goto err; 1785 } 1786 memcpy(s->session->tlsext_tick, p, ticklen); 1787 s->session->tlsext_ticklen = ticklen; 1788 /* There are two ways to detect a resumed ticket sesion. 1789 * One is to set an appropriate session ID and then the server 1790 * must return a match in ServerHello. This allows the normal 1791 * client session ID matching to work and we know much 1792 * earlier that the ticket has been accepted. 1793 * 1794 * The other way is to set zero length session ID when the 1795 * ticket is presented and rely on the handshake to determine 1796 * session resumption. 1797 * 1798 * We choose the former approach because this fits in with 1799 * assumptions elsewhere in OpenSSL. The session ID is set 1800 * to the SHA256 (or SHA1 is SHA256 is disabled) hash of the 1801 * ticket. 1802 */ 1803 EVP_Digest(p, ticklen, 1804 s->session->session_id, &s->session->session_id_length, 1805 #ifndef OPENSSL_NO_SHA256 1806 EVP_sha256(), NULL); 1807 #else 1808 EVP_sha1(), NULL); 1809 #endif 1810 ret=1; 1811 return(ret); 1812 f_err: 1813 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1814 err: 1815 return(-1); 1816 } 1817 1818 int ssl3_get_cert_status(SSL *s) 1819 { 1820 int ok, al; 1821 unsigned long resplen; 1822 long n; 1823 const unsigned char *p; 1824 1825 n=s->method->ssl_get_message(s, 1826 SSL3_ST_CR_CERT_STATUS_A, 1827 SSL3_ST_CR_CERT_STATUS_B, 1828 SSL3_MT_CERTIFICATE_STATUS, 1829 16384, 1830 &ok); 1831 1832 if (!ok) return((int)n); 1833 if (n < 4) 1834 { 1835 /* need at least status type + length */ 1836 al = SSL_AD_DECODE_ERROR; 1837 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 1838 goto f_err; 1839 } 1840 p = (unsigned char *)s->init_msg; 1841 if (*p++ != TLSEXT_STATUSTYPE_ocsp) 1842 { 1843 al = SSL_AD_DECODE_ERROR; 1844 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_UNSUPPORTED_STATUS_TYPE); 1845 goto f_err; 1846 } 1847 n2l3(p, resplen); 1848 if (resplen + 4 != (unsigned long)n) 1849 { 1850 al = SSL_AD_DECODE_ERROR; 1851 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_LENGTH_MISMATCH); 1852 goto f_err; 1853 } 1854 if (s->tlsext_ocsp_resp) 1855 OPENSSL_free(s->tlsext_ocsp_resp); 1856 s->tlsext_ocsp_resp = BUF_memdup(p, resplen); 1857 if (!s->tlsext_ocsp_resp) 1858 { 1859 al = SSL_AD_INTERNAL_ERROR; 1860 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 1861 goto f_err; 1862 } 1863 s->tlsext_ocsp_resplen = resplen; 1864 if (s->ctx->tlsext_status_cb) 1865 { 1866 int ret; 1867 ret = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg); 1868 if (ret == 0) 1869 { 1870 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE; 1871 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,SSL_R_INVALID_STATUS_RESPONSE); 1872 goto f_err; 1873 } 1874 if (ret < 0) 1875 { 1876 al = SSL_AD_INTERNAL_ERROR; 1877 SSLerr(SSL_F_SSL3_GET_CERT_STATUS,ERR_R_MALLOC_FAILURE); 1878 goto f_err; 1879 } 1880 } 1881 return 1; 1882 f_err: 1883 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1884 return(-1); 1885 } 1886 #endif 1887 1888 int ssl3_get_server_done(SSL *s) 1889 { 1890 int ok,ret=0; 1891 long n; 1892 1893 n=s->method->ssl_get_message(s, 1894 SSL3_ST_CR_SRVR_DONE_A, 1895 SSL3_ST_CR_SRVR_DONE_B, 1896 SSL3_MT_SERVER_DONE, 1897 30, /* should be very small, like 0 :-) */ 1898 &ok); 1899 1900 if (!ok) return((int)n); 1901 if (n > 0) 1902 { 1903 /* should contain no data */ 1904 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1905 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 1906 return -1; 1907 } 1908 ret=1; 1909 return(ret); 1910 } 1911 1912 1913 int ssl3_send_client_key_exchange(SSL *s) 1914 { 1915 unsigned char *p,*d; 1916 int n; 1917 unsigned long l; 1918 #ifndef OPENSSL_NO_RSA 1919 unsigned char *q; 1920 EVP_PKEY *pkey=NULL; 1921 #endif 1922 #ifndef OPENSSL_NO_KRB5 1923 KSSL_ERR kssl_err; 1924 #endif /* OPENSSL_NO_KRB5 */ 1925 #ifndef OPENSSL_NO_ECDH 1926 EC_KEY *clnt_ecdh = NULL; 1927 const EC_POINT *srvr_ecpoint = NULL; 1928 EVP_PKEY *srvr_pub_pkey = NULL; 1929 unsigned char *encodedPoint = NULL; 1930 int encoded_pt_len = 0; 1931 BN_CTX * bn_ctx = NULL; 1932 #endif 1933 1934 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 1935 { 1936 d=(unsigned char *)s->init_buf->data; 1937 p= &(d[4]); 1938 1939 l=s->s3->tmp.new_cipher->algorithms; 1940 1941 /* Fool emacs indentation */ 1942 if (0) {} 1943 #ifndef OPENSSL_NO_RSA 1944 else if (l & SSL_kRSA) 1945 { 1946 RSA *rsa; 1947 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 1948 1949 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1950 rsa=s->session->sess_cert->peer_rsa_tmp; 1951 else 1952 { 1953 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1954 if ((pkey == NULL) || 1955 (pkey->type != EVP_PKEY_RSA) || 1956 (pkey->pkey.rsa == NULL)) 1957 { 1958 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1959 goto err; 1960 } 1961 rsa=pkey->pkey.rsa; 1962 EVP_PKEY_free(pkey); 1963 } 1964 1965 tmp_buf[0]=s->client_version>>8; 1966 tmp_buf[1]=s->client_version&0xff; 1967 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 1968 goto err; 1969 1970 s->session->master_key_length=sizeof tmp_buf; 1971 1972 q=p; 1973 /* Fix buf for TLS and beyond */ 1974 if (s->version > SSL3_VERSION) 1975 p+=2; 1976 n=RSA_public_encrypt(sizeof tmp_buf, 1977 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 1978 #ifdef PKCS1_CHECK 1979 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 1980 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 1981 #endif 1982 if (n <= 0) 1983 { 1984 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 1985 goto err; 1986 } 1987 1988 /* Fix buf for TLS and beyond */ 1989 if (s->version > SSL3_VERSION) 1990 { 1991 s2n(n,q); 1992 n+=2; 1993 } 1994 1995 s->session->master_key_length= 1996 s->method->ssl3_enc->generate_master_secret(s, 1997 s->session->master_key, 1998 tmp_buf,sizeof tmp_buf); 1999 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 2000 } 2001 #endif 2002 #ifndef OPENSSL_NO_KRB5 2003 else if (l & SSL_kKRB5) 2004 { 2005 krb5_error_code krb5rc; 2006 KSSL_CTX *kssl_ctx = s->kssl_ctx; 2007 /* krb5_data krb5_ap_req; */ 2008 krb5_data *enc_ticket; 2009 krb5_data authenticator, *authp = NULL; 2010 EVP_CIPHER_CTX ciph_ctx; 2011 EVP_CIPHER *enc = NULL; 2012 unsigned char iv[EVP_MAX_IV_LENGTH]; 2013 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 2014 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 2015 + EVP_MAX_IV_LENGTH]; 2016 int padl, outl = sizeof(epms); 2017 2018 EVP_CIPHER_CTX_init(&ciph_ctx); 2019 2020 #ifdef KSSL_DEBUG 2021 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 2022 l, SSL_kKRB5); 2023 #endif /* KSSL_DEBUG */ 2024 2025 authp = NULL; 2026 #ifdef KRB5SENDAUTH 2027 if (KRB5SENDAUTH) authp = &authenticator; 2028 #endif /* KRB5SENDAUTH */ 2029 2030 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 2031 &kssl_err); 2032 enc = kssl_map_enc(kssl_ctx->enctype); 2033 if (enc == NULL) 2034 goto err; 2035 #ifdef KSSL_DEBUG 2036 { 2037 printf("kssl_cget_tkt rtn %d\n", krb5rc); 2038 if (krb5rc && kssl_err.text) 2039 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 2040 } 2041 #endif /* KSSL_DEBUG */ 2042 2043 if (krb5rc) 2044 { 2045 ssl3_send_alert(s,SSL3_AL_FATAL, 2046 SSL_AD_HANDSHAKE_FAILURE); 2047 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2048 kssl_err.reason); 2049 goto err; 2050 } 2051 2052 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 2053 ** in place of RFC 2712 KerberosWrapper, as in: 2054 ** 2055 ** Send ticket (copy to *p, set n = length) 2056 ** n = krb5_ap_req.length; 2057 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 2058 ** if (krb5_ap_req.data) 2059 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 2060 ** 2061 ** Now using real RFC 2712 KerberosWrapper 2062 ** (Thanks to Simon Wilkinson <sxw (at) sxw.org.uk>) 2063 ** Note: 2712 "opaque" types are here replaced 2064 ** with a 2-byte length followed by the value. 2065 ** Example: 2066 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 2067 ** Where "xx xx" = length bytes. Shown here with 2068 ** optional authenticator omitted. 2069 */ 2070 2071 /* KerberosWrapper.Ticket */ 2072 s2n(enc_ticket->length,p); 2073 memcpy(p, enc_ticket->data, enc_ticket->length); 2074 p+= enc_ticket->length; 2075 n = enc_ticket->length + 2; 2076 2077 /* KerberosWrapper.Authenticator */ 2078 if (authp && authp->length) 2079 { 2080 s2n(authp->length,p); 2081 memcpy(p, authp->data, authp->length); 2082 p+= authp->length; 2083 n+= authp->length + 2; 2084 2085 free(authp->data); 2086 authp->data = NULL; 2087 authp->length = 0; 2088 } 2089 else 2090 { 2091 s2n(0,p);/* null authenticator length */ 2092 n+=2; 2093 } 2094 2095 tmp_buf[0]=s->client_version>>8; 2096 tmp_buf[1]=s->client_version&0xff; 2097 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 2098 goto err; 2099 2100 /* 20010420 VRS. Tried it this way; failed. 2101 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 2102 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 2103 ** kssl_ctx->length); 2104 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 2105 */ 2106 2107 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 2108 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 2109 kssl_ctx->key,iv); 2110 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 2111 sizeof tmp_buf); 2112 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 2113 outl += padl; 2114 if (outl > sizeof epms) 2115 { 2116 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 2117 goto err; 2118 } 2119 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 2120 2121 /* KerberosWrapper.EncryptedPreMasterSecret */ 2122 s2n(outl,p); 2123 memcpy(p, epms, outl); 2124 p+=outl; 2125 n+=outl + 2; 2126 2127 s->session->master_key_length= 2128 s->method->ssl3_enc->generate_master_secret(s, 2129 s->session->master_key, 2130 tmp_buf, sizeof tmp_buf); 2131 2132 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 2133 OPENSSL_cleanse(epms, outl); 2134 } 2135 #endif 2136 #ifndef OPENSSL_NO_DH 2137 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2138 { 2139 DH *dh_srvr,*dh_clnt; 2140 2141 if (s->session->sess_cert == NULL) 2142 { 2143 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 2144 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 2145 goto err; 2146 } 2147 2148 if (s->session->sess_cert->peer_dh_tmp != NULL) 2149 dh_srvr=s->session->sess_cert->peer_dh_tmp; 2150 else 2151 { 2152 /* we get them from the cert */ 2153 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2154 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 2155 goto err; 2156 } 2157 2158 /* generate a new random key */ 2159 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 2160 { 2161 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2162 goto err; 2163 } 2164 if (!DH_generate_key(dh_clnt)) 2165 { 2166 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2167 goto err; 2168 } 2169 2170 /* use the 'p' output buffer for the DH key, but 2171 * make sure to clear it out afterwards */ 2172 2173 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 2174 2175 if (n <= 0) 2176 { 2177 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 2178 goto err; 2179 } 2180 2181 /* generate master key from the result */ 2182 s->session->master_key_length= 2183 s->method->ssl3_enc->generate_master_secret(s, 2184 s->session->master_key,p,n); 2185 /* clean up */ 2186 memset(p,0,n); 2187 2188 /* send off the data */ 2189 n=BN_num_bytes(dh_clnt->pub_key); 2190 s2n(n,p); 2191 BN_bn2bin(dh_clnt->pub_key,p); 2192 n+=2; 2193 2194 DH_free(dh_clnt); 2195 2196 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 2197 } 2198 #endif 2199 2200 #ifndef OPENSSL_NO_ECDH 2201 else if ((l & SSL_kECDH) || (l & SSL_kECDHE)) 2202 { 2203 const EC_GROUP *srvr_group = NULL; 2204 EC_KEY *tkey; 2205 int ecdh_clnt_cert = 0; 2206 int field_size = 0; 2207 2208 /* Did we send out the client's 2209 * ECDH share for use in premaster 2210 * computation as part of client certificate? 2211 * If so, set ecdh_clnt_cert to 1. 2212 */ 2213 if ((l & SSL_kECDH) && (s->cert != NULL)) 2214 { 2215 /* XXX: For now, we do not support client 2216 * authentication using ECDH certificates. 2217 * To add such support, one needs to add 2218 * code that checks for appropriate 2219 * conditions and sets ecdh_clnt_cert to 1. 2220 * For example, the cert have an ECC 2221 * key on the same curve as the server's 2222 * and the key should be authorized for 2223 * key agreement. 2224 * 2225 * One also needs to add code in ssl3_connect 2226 * to skip sending the certificate verify 2227 * message. 2228 * 2229 * if ((s->cert->key->privatekey != NULL) && 2230 * (s->cert->key->privatekey->type == 2231 * EVP_PKEY_EC) && ...) 2232 * ecdh_clnt_cert = 1; 2233 */ 2234 } 2235 2236 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 2237 { 2238 tkey = s->session->sess_cert->peer_ecdh_tmp; 2239 } 2240 else 2241 { 2242 /* Get the Server Public Key from Cert */ 2243 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 2244 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 2245 if ((srvr_pub_pkey == NULL) || 2246 (srvr_pub_pkey->type != EVP_PKEY_EC) || 2247 (srvr_pub_pkey->pkey.ec == NULL)) 2248 { 2249 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2250 ERR_R_INTERNAL_ERROR); 2251 goto err; 2252 } 2253 2254 tkey = srvr_pub_pkey->pkey.ec; 2255 } 2256 2257 srvr_group = EC_KEY_get0_group(tkey); 2258 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 2259 2260 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 2261 { 2262 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2263 ERR_R_INTERNAL_ERROR); 2264 goto err; 2265 } 2266 2267 if ((clnt_ecdh=EC_KEY_new()) == NULL) 2268 { 2269 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2270 goto err; 2271 } 2272 2273 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 2274 { 2275 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2276 goto err; 2277 } 2278 if (ecdh_clnt_cert) 2279 { 2280 /* Reuse key info from our certificate 2281 * We only need our private key to perform 2282 * the ECDH computation. 2283 */ 2284 const BIGNUM *priv_key; 2285 tkey = s->cert->key->privatekey->pkey.ec; 2286 priv_key = EC_KEY_get0_private_key(tkey); 2287 if (priv_key == NULL) 2288 { 2289 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2290 goto err; 2291 } 2292 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 2293 { 2294 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 2295 goto err; 2296 } 2297 } 2298 else 2299 { 2300 /* Generate a new ECDH key pair */ 2301 if (!(EC_KEY_generate_key(clnt_ecdh))) 2302 { 2303 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2304 goto err; 2305 } 2306 } 2307 2308 /* use the 'p' output buffer for the ECDH key, but 2309 * make sure to clear it out afterwards 2310 */ 2311 2312 field_size = EC_GROUP_get_degree(srvr_group); 2313 if (field_size <= 0) 2314 { 2315 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2316 ERR_R_ECDH_LIB); 2317 goto err; 2318 } 2319 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2320 if (n <= 0) 2321 { 2322 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2323 ERR_R_ECDH_LIB); 2324 goto err; 2325 } 2326 2327 /* generate master key from the result */ 2328 s->session->master_key_length = s->method->ssl3_enc \ 2329 -> generate_master_secret(s, 2330 s->session->master_key, 2331 p, n); 2332 2333 memset(p, 0, n); /* clean up */ 2334 2335 if (ecdh_clnt_cert) 2336 { 2337 /* Send empty client key exch message */ 2338 n = 0; 2339 } 2340 else 2341 { 2342 /* First check the size of encoding and 2343 * allocate memory accordingly. 2344 */ 2345 encoded_pt_len = 2346 EC_POINT_point2oct(srvr_group, 2347 EC_KEY_get0_public_key(clnt_ecdh), 2348 POINT_CONVERSION_UNCOMPRESSED, 2349 NULL, 0, NULL); 2350 2351 encodedPoint = (unsigned char *) 2352 OPENSSL_malloc(encoded_pt_len * 2353 sizeof(unsigned char)); 2354 bn_ctx = BN_CTX_new(); 2355 if ((encodedPoint == NULL) || 2356 (bn_ctx == NULL)) 2357 { 2358 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2359 goto err; 2360 } 2361 2362 /* Encode the public key */ 2363 n = EC_POINT_point2oct(srvr_group, 2364 EC_KEY_get0_public_key(clnt_ecdh), 2365 POINT_CONVERSION_UNCOMPRESSED, 2366 encodedPoint, encoded_pt_len, bn_ctx); 2367 2368 *p = n; /* length of encoded point */ 2369 /* Encoded point will be copied here */ 2370 p += 1; 2371 /* copy the point */ 2372 memcpy((unsigned char *)p, encodedPoint, n); 2373 /* increment n to account for length field */ 2374 n += 1; 2375 } 2376 2377 /* Free allocated memory */ 2378 BN_CTX_free(bn_ctx); 2379 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2380 if (clnt_ecdh != NULL) 2381 EC_KEY_free(clnt_ecdh); 2382 EVP_PKEY_free(srvr_pub_pkey); 2383 } 2384 #endif /* !OPENSSL_NO_ECDH */ 2385 else 2386 { 2387 ssl3_send_alert(s, SSL3_AL_FATAL, 2388 SSL_AD_HANDSHAKE_FAILURE); 2389 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2390 ERR_R_INTERNAL_ERROR); 2391 goto err; 2392 } 2393 2394 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 2395 l2n3(n,d); 2396 2397 s->state=SSL3_ST_CW_KEY_EXCH_B; 2398 /* number of bytes to write */ 2399 s->init_num=n+4; 2400 s->init_off=0; 2401 } 2402 2403 /* SSL3_ST_CW_KEY_EXCH_B */ 2404 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2405 err: 2406 #ifndef OPENSSL_NO_ECDH 2407 BN_CTX_free(bn_ctx); 2408 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2409 if (clnt_ecdh != NULL) 2410 EC_KEY_free(clnt_ecdh); 2411 EVP_PKEY_free(srvr_pub_pkey); 2412 #endif 2413 return(-1); 2414 } 2415 2416 int ssl3_send_client_verify(SSL *s) 2417 { 2418 unsigned char *p,*d; 2419 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 2420 EVP_PKEY *pkey; 2421 #ifndef OPENSSL_NO_RSA 2422 unsigned u=0; 2423 #endif 2424 unsigned long n; 2425 #if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA) 2426 int j; 2427 #endif 2428 2429 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 2430 { 2431 d=(unsigned char *)s->init_buf->data; 2432 p= &(d[4]); 2433 pkey=s->cert->key->privatekey; 2434 2435 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2), 2436 &(data[MD5_DIGEST_LENGTH])); 2437 2438 #ifndef OPENSSL_NO_RSA 2439 if (pkey->type == EVP_PKEY_RSA) 2440 { 2441 s->method->ssl3_enc->cert_verify_mac(s, 2442 &(s->s3->finish_dgst1),&(data[0])); 2443 if (RSA_sign(NID_md5_sha1, data, 2444 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 2445 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 2446 { 2447 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 2448 goto err; 2449 } 2450 s2n(u,p); 2451 n=u+2; 2452 } 2453 else 2454 #endif 2455 #ifndef OPENSSL_NO_DSA 2456 if (pkey->type == EVP_PKEY_DSA) 2457 { 2458 if (!DSA_sign(pkey->save_type, 2459 &(data[MD5_DIGEST_LENGTH]), 2460 SHA_DIGEST_LENGTH,&(p[2]), 2461 (unsigned int *)&j,pkey->pkey.dsa)) 2462 { 2463 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 2464 goto err; 2465 } 2466 s2n(j,p); 2467 n=j+2; 2468 } 2469 else 2470 #endif 2471 #ifndef OPENSSL_NO_ECDSA 2472 if (pkey->type == EVP_PKEY_EC) 2473 { 2474 if (!ECDSA_sign(pkey->save_type, 2475 &(data[MD5_DIGEST_LENGTH]), 2476 SHA_DIGEST_LENGTH,&(p[2]), 2477 (unsigned int *)&j,pkey->pkey.ec)) 2478 { 2479 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 2480 ERR_R_ECDSA_LIB); 2481 goto err; 2482 } 2483 s2n(j,p); 2484 n=j+2; 2485 } 2486 else 2487 #endif 2488 { 2489 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 2490 goto err; 2491 } 2492 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 2493 l2n3(n,d); 2494 2495 s->state=SSL3_ST_CW_CERT_VRFY_B; 2496 s->init_num=(int)n+4; 2497 s->init_off=0; 2498 } 2499 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2500 err: 2501 return(-1); 2502 } 2503 2504 int ssl3_send_client_certificate(SSL *s) 2505 { 2506 X509 *x509=NULL; 2507 EVP_PKEY *pkey=NULL; 2508 int i; 2509 unsigned long l; 2510 2511 if (s->state == SSL3_ST_CW_CERT_A) 2512 { 2513 if ((s->cert == NULL) || 2514 (s->cert->key->x509 == NULL) || 2515 (s->cert->key->privatekey == NULL)) 2516 s->state=SSL3_ST_CW_CERT_B; 2517 else 2518 s->state=SSL3_ST_CW_CERT_C; 2519 } 2520 2521 /* We need to get a client cert */ 2522 if (s->state == SSL3_ST_CW_CERT_B) 2523 { 2524 /* If we get an error, we need to 2525 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 2526 * We then get retied later */ 2527 i=0; 2528 i = ssl_do_client_cert_cb(s, &x509, &pkey); 2529 if (i < 0) 2530 { 2531 s->rwstate=SSL_X509_LOOKUP; 2532 return(-1); 2533 } 2534 s->rwstate=SSL_NOTHING; 2535 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 2536 { 2537 s->state=SSL3_ST_CW_CERT_B; 2538 if ( !SSL_use_certificate(s,x509) || 2539 !SSL_use_PrivateKey(s,pkey)) 2540 i=0; 2541 } 2542 else if (i == 1) 2543 { 2544 i=0; 2545 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 2546 } 2547 2548 if (x509 != NULL) X509_free(x509); 2549 if (pkey != NULL) EVP_PKEY_free(pkey); 2550 if (i == 0) 2551 { 2552 if (s->version == SSL3_VERSION) 2553 { 2554 s->s3->tmp.cert_req=0; 2555 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 2556 return(1); 2557 } 2558 else 2559 { 2560 s->s3->tmp.cert_req=2; 2561 } 2562 } 2563 2564 /* Ok, we have a cert */ 2565 s->state=SSL3_ST_CW_CERT_C; 2566 } 2567 2568 if (s->state == SSL3_ST_CW_CERT_C) 2569 { 2570 s->state=SSL3_ST_CW_CERT_D; 2571 l=ssl3_output_cert_chain(s, 2572 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 2573 s->init_num=(int)l; 2574 s->init_off=0; 2575 } 2576 /* SSL3_ST_CW_CERT_D */ 2577 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2578 } 2579 2580 #define has_bits(i,m) (((i)&(m)) == (m)) 2581 2582 int ssl3_check_cert_and_algorithm(SSL *s) 2583 { 2584 int i,idx; 2585 long algs; 2586 EVP_PKEY *pkey=NULL; 2587 SESS_CERT *sc; 2588 #ifndef OPENSSL_NO_RSA 2589 RSA *rsa; 2590 #endif 2591 #ifndef OPENSSL_NO_DH 2592 DH *dh; 2593 #endif 2594 2595 sc=s->session->sess_cert; 2596 2597 algs=s->s3->tmp.new_cipher->algorithms; 2598 2599 /* we don't have a certificate */ 2600 if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) 2601 return(1); 2602 2603 if (sc == NULL) 2604 { 2605 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 2606 goto err; 2607 } 2608 2609 #ifndef OPENSSL_NO_RSA 2610 rsa=s->session->sess_cert->peer_rsa_tmp; 2611 #endif 2612 #ifndef OPENSSL_NO_DH 2613 dh=s->session->sess_cert->peer_dh_tmp; 2614 #endif 2615 2616 /* This is the passed certificate */ 2617 2618 idx=sc->peer_cert_type; 2619 #ifndef OPENSSL_NO_ECDH 2620 if (idx == SSL_PKEY_ECC) 2621 { 2622 if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 2623 s->s3->tmp.new_cipher) == 0) 2624 { /* check failed */ 2625 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 2626 goto f_err; 2627 } 2628 else 2629 { 2630 return 1; 2631 } 2632 } 2633 #endif 2634 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 2635 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 2636 EVP_PKEY_free(pkey); 2637 2638 2639 /* Check that we have a certificate if we require one */ 2640 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 2641 { 2642 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 2643 goto f_err; 2644 } 2645 #ifndef OPENSSL_NO_DSA 2646 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 2647 { 2648 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 2649 goto f_err; 2650 } 2651 #endif 2652 #ifndef OPENSSL_NO_RSA 2653 if ((algs & SSL_kRSA) && 2654 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 2655 { 2656 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 2657 goto f_err; 2658 } 2659 #endif 2660 #ifndef OPENSSL_NO_DH 2661 if ((algs & SSL_kEDH) && 2662 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 2663 { 2664 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 2665 goto f_err; 2666 } 2667 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 2668 { 2669 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 2670 goto f_err; 2671 } 2672 #ifndef OPENSSL_NO_DSA 2673 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 2674 { 2675 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 2676 goto f_err; 2677 } 2678 #endif 2679 #endif 2680 2681 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 2682 { 2683 #ifndef OPENSSL_NO_RSA 2684 if (algs & SSL_kRSA) 2685 { 2686 if (rsa == NULL 2687 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 2688 { 2689 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 2690 goto f_err; 2691 } 2692 } 2693 else 2694 #endif 2695 #ifndef OPENSSL_NO_DH 2696 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2697 { 2698 if (dh == NULL 2699 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 2700 { 2701 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 2702 goto f_err; 2703 } 2704 } 2705 else 2706 #endif 2707 { 2708 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 2709 goto f_err; 2710 } 2711 } 2712 return(1); 2713 f_err: 2714 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2715 err: 2716 return(0); 2717 } 2718 2719 2720 #ifndef OPENSSL_NO_ECDH 2721 /* This is the complement of nid2curve_id in s3_srvr.c. */ 2722 static int curve_id2nid(int curve_id) 2723 { 2724 /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001) 2725 * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */ 2726 static int nid_list[26] = 2727 { 2728 0, 2729 NID_sect163k1, /* sect163k1 (1) */ 2730 NID_sect163r1, /* sect163r1 (2) */ 2731 NID_sect163r2, /* sect163r2 (3) */ 2732 NID_sect193r1, /* sect193r1 (4) */ 2733 NID_sect193r2, /* sect193r2 (5) */ 2734 NID_sect233k1, /* sect233k1 (6) */ 2735 NID_sect233r1, /* sect233r1 (7) */ 2736 NID_sect239k1, /* sect239k1 (8) */ 2737 NID_sect283k1, /* sect283k1 (9) */ 2738 NID_sect283r1, /* sect283r1 (10) */ 2739 NID_sect409k1, /* sect409k1 (11) */ 2740 NID_sect409r1, /* sect409r1 (12) */ 2741 NID_sect571k1, /* sect571k1 (13) */ 2742 NID_sect571r1, /* sect571r1 (14) */ 2743 NID_secp160k1, /* secp160k1 (15) */ 2744 NID_secp160r1, /* secp160r1 (16) */ 2745 NID_secp160r2, /* secp160r2 (17) */ 2746 NID_secp192k1, /* secp192k1 (18) */ 2747 NID_X9_62_prime192v1, /* secp192r1 (19) */ 2748 NID_secp224k1, /* secp224k1 (20) */ 2749 NID_secp224r1, /* secp224r1 (21) */ 2750 NID_secp256k1, /* secp256k1 (22) */ 2751 NID_X9_62_prime256v1, /* secp256r1 (23) */ 2752 NID_secp384r1, /* secp384r1 (24) */ 2753 NID_secp521r1 /* secp521r1 (25) */ 2754 }; 2755 2756 if ((curve_id < 1) || (curve_id > 25)) return 0; 2757 2758 return nid_list[curve_id]; 2759 } 2760 #endif 2761 2762 /* Check to see if handshake is full or resumed. Usually this is just a 2763 * case of checking to see if a cache hit has occurred. In the case of 2764 * session tickets we have to check the next message to be sure. 2765 */ 2766 2767 #ifndef OPENSSL_NO_TLSEXT 2768 int ssl3_check_finished(SSL *s) 2769 { 2770 int ok; 2771 long n; 2772 /* If we have no ticket or session ID is non-zero length (a match of 2773 * a non-zero session length would never reach here) it cannot be a 2774 * resumed session. 2775 */ 2776 if (!s->session->tlsext_tick || s->session->session_id_length) 2777 return 1; 2778 /* this function is called when we really expect a Certificate 2779 * message, so permit appropriate message length */ 2780 n=s->method->ssl_get_message(s, 2781 SSL3_ST_CR_CERT_A, 2782 SSL3_ST_CR_CERT_B, 2783 -1, 2784 s->max_cert_list, 2785 &ok); 2786 if (!ok) return((int)n); 2787 s->s3->tmp.reuse_message = 1; 2788 if ((s->s3->tmp.message_type == SSL3_MT_FINISHED) 2789 || (s->s3->tmp.message_type == SSL3_MT_NEWSESSION_TICKET)) 2790 return 2; 2791 2792 return 1; 2793 } 2794 #endif 2795 2796 int ssl_do_client_cert_cb(SSL *s, X509 **px509, EVP_PKEY **ppkey) 2797 { 2798 int i = 0; 2799 #ifndef OPENSSL_NO_ENGINE 2800 if (s->ctx->client_cert_engine) 2801 { 2802 i = ENGINE_load_ssl_client_cert(s->ctx->client_cert_engine, s, 2803 SSL_get_client_CA_list(s), 2804 px509, ppkey, NULL, NULL, NULL); 2805 if (i != 0) 2806 return i; 2807 } 2808 #endif 2809 if (s->ctx->client_cert_cb) 2810 i = s->ctx->client_cert_cb(s,px509,ppkey); 2811 return i; 2812 } 2813
