1/* ssl/s3_clnt.c */ 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 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@openssl.org. 82 * 83 * 5. Products derived from this software may not be called "OpenSSL" 84 * nor may "OpenSSL" appear in their names without prior written 85 * permission of the OpenSSL Project. 86 * 87 * 6. Redistributions of any form whatsoever must retain the following 88 * acknowledgment: 89 * "This product includes software developed by the OpenSSL Project 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103 * OF THE POSSIBILITY OF SUCH DAMAGE. 104 * ==================================================================== 105 * 106 * This product includes cryptographic software written by Eric Young 107 * (eay@cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh@cryptsoft.com). 109 * 110 */ 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#ifndef OPENSSL_NO_DH 134#include <openssl/dh.h> 135#endif 136#include <openssl/bn.h> 137 138static SSL_METHOD *ssl3_get_client_method(int ver); 139static int ca_dn_cmp(const X509_NAME * const *a,const X509_NAME * const *b); 140 141#ifndef OPENSSL_NO_ECDH 142static int curve_id2nid(int curve_id); 143int check_srvr_ecc_cert_and_alg(X509 *x, SSL_CIPHER *cs); 144#endif 145 146static SSL_METHOD *ssl3_get_client_method(int ver) 147 { 148 if (ver == SSL3_VERSION) 149 return(SSLv3_client_method()); 150 else 151 return(NULL); 152 } 153 154IMPLEMENT_ssl3_meth_func(SSLv3_client_method, 155 ssl_undefined_function, 156 ssl3_connect, 157 ssl3_get_client_method) 158 159int ssl3_connect(SSL *s) 160 { 161 BUF_MEM *buf=NULL; 162 unsigned long Time=(unsigned long)time(NULL),l; 163 long num1; 164 void (*cb)(const SSL *ssl,int type,int val)=NULL; 165 int ret= -1; 166 int new_state,state,skip=0;; 167 168 RAND_add(&Time,sizeof(Time),0); 169 ERR_clear_error(); 170 clear_sys_error(); 171 172 if (s->info_callback != NULL) 173 cb=s->info_callback; 174 else if (s->ctx->info_callback != NULL) 175 cb=s->ctx->info_callback; 176 177 s->in_handshake++; 178 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s); 179 180 for (;;) 181 { 182 state=s->state; 183 184 switch(s->state) 185 { 186 case SSL_ST_RENEGOTIATE: 187 s->new_session=1; 188 s->state=SSL_ST_CONNECT; 189 s->ctx->stats.sess_connect_renegotiate++; 190 /* break */ 191 case SSL_ST_BEFORE: 192 case SSL_ST_CONNECT: 193 case SSL_ST_BEFORE|SSL_ST_CONNECT: 194 case SSL_ST_OK|SSL_ST_CONNECT: 195 196 s->server=0; 197 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1); 198 199 if ((s->version & 0xff00 ) != 0x0300) 200 { 201 SSLerr(SSL_F_SSL3_CONNECT, ERR_R_INTERNAL_ERROR); 202 ret = -1; 203 goto end; 204 } 205 206 /* s->version=SSL3_VERSION; */ 207 s->type=SSL_ST_CONNECT; 208 209 if (s->init_buf == NULL) 210 { 211 if ((buf=BUF_MEM_new()) == NULL) 212 { 213 ret= -1; 214 goto end; 215 } 216 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH)) 217 { 218 ret= -1; 219 goto end; 220 } 221 s->init_buf=buf; 222 buf=NULL; 223 } 224 225 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; } 226 227 /* setup buffing BIO */ 228 if (!ssl_init_wbio_buffer(s,0)) { ret= -1; goto end; } 229 230 /* don't push the buffering BIO quite yet */ 231 232 ssl3_init_finished_mac(s); 233 234 s->state=SSL3_ST_CW_CLNT_HELLO_A; 235 s->ctx->stats.sess_connect++; 236 s->init_num=0; 237 break; 238 239 case SSL3_ST_CW_CLNT_HELLO_A: 240 case SSL3_ST_CW_CLNT_HELLO_B: 241 242 s->shutdown=0; 243 ret=ssl3_client_hello(s); 244 if (ret <= 0) goto end; 245 s->state=SSL3_ST_CR_SRVR_HELLO_A; 246 s->init_num=0; 247 248 /* turn on buffering for the next lot of output */ 249 if (s->bbio != s->wbio) 250 s->wbio=BIO_push(s->bbio,s->wbio); 251 252 break; 253 254 case SSL3_ST_CR_SRVR_HELLO_A: 255 case SSL3_ST_CR_SRVR_HELLO_B: 256 ret=ssl3_get_server_hello(s); 257 if (ret <= 0) goto end; 258 if (s->hit) 259 s->state=SSL3_ST_CR_FINISHED_A; 260 else 261 s->state=SSL3_ST_CR_CERT_A; 262 s->init_num=0; 263 break; 264 265 case SSL3_ST_CR_CERT_A: 266 case SSL3_ST_CR_CERT_B: 267 /* Check if it is anon DH/ECDH */ 268 if (!(s->s3->tmp.new_cipher->algorithms & SSL_aNULL)) 269 { 270 ret=ssl3_get_server_certificate(s); 271 if (ret <= 0) goto end; 272 } 273 else 274 skip=1; 275 s->state=SSL3_ST_CR_KEY_EXCH_A; 276 s->init_num=0; 277 break; 278 279 case SSL3_ST_CR_KEY_EXCH_A: 280 case SSL3_ST_CR_KEY_EXCH_B: 281 ret=ssl3_get_key_exchange(s); 282 if (ret <= 0) goto end; 283 s->state=SSL3_ST_CR_CERT_REQ_A; 284 s->init_num=0; 285 286 /* at this point we check that we have the 287 * required stuff from the server */ 288 if (!ssl3_check_cert_and_algorithm(s)) 289 { 290 ret= -1; 291 goto end; 292 } 293 break; 294 295 case SSL3_ST_CR_CERT_REQ_A: 296 case SSL3_ST_CR_CERT_REQ_B: 297 ret=ssl3_get_certificate_request(s); 298 if (ret <= 0) goto end; 299 s->state=SSL3_ST_CR_SRVR_DONE_A; 300 s->init_num=0; 301 break; 302 303 case SSL3_ST_CR_SRVR_DONE_A: 304 case SSL3_ST_CR_SRVR_DONE_B: 305 ret=ssl3_get_server_done(s); 306 if (ret <= 0) goto end; 307 if (s->s3->tmp.cert_req) 308 s->state=SSL3_ST_CW_CERT_A; 309 else 310 s->state=SSL3_ST_CW_KEY_EXCH_A; 311 s->init_num=0; 312 313 break; 314 315 case SSL3_ST_CW_CERT_A: 316 case SSL3_ST_CW_CERT_B: 317 case SSL3_ST_CW_CERT_C: 318 case SSL3_ST_CW_CERT_D: 319 ret=ssl3_send_client_certificate(s); 320 if (ret <= 0) goto end; 321 s->state=SSL3_ST_CW_KEY_EXCH_A; 322 s->init_num=0; 323 break; 324 325 case SSL3_ST_CW_KEY_EXCH_A: 326 case SSL3_ST_CW_KEY_EXCH_B: 327 ret=ssl3_send_client_key_exchange(s); 328 if (ret <= 0) goto end; 329 l=s->s3->tmp.new_cipher->algorithms; 330 /* EAY EAY EAY need to check for DH fix cert 331 * sent back */ 332 /* For TLS, cert_req is set to 2, so a cert chain 333 * of nothing is sent, but no verify packet is sent */ 334 /* XXX: For now, we do not support client 335 * authentication in ECDH cipher suites with 336 * ECDH (rather than ECDSA) certificates. 337 * We need to skip the certificate verify 338 * message when client's ECDH public key is sent 339 * inside the client certificate. 340 */ 341 if (s->s3->tmp.cert_req == 1) 342 { 343 s->state=SSL3_ST_CW_CERT_VRFY_A; 344 } 345 else 346 { 347 s->state=SSL3_ST_CW_CHANGE_A; 348 s->s3->change_cipher_spec=0; 349 } 350 351 s->init_num=0; 352 break; 353 354 case SSL3_ST_CW_CERT_VRFY_A: 355 case SSL3_ST_CW_CERT_VRFY_B: 356 ret=ssl3_send_client_verify(s); 357 if (ret <= 0) goto end; 358 s->state=SSL3_ST_CW_CHANGE_A; 359 s->init_num=0; 360 s->s3->change_cipher_spec=0; 361 break; 362 363 case SSL3_ST_CW_CHANGE_A: 364 case SSL3_ST_CW_CHANGE_B: 365 ret=ssl3_send_change_cipher_spec(s, 366 SSL3_ST_CW_CHANGE_A,SSL3_ST_CW_CHANGE_B); 367 if (ret <= 0) goto end; 368 s->state=SSL3_ST_CW_FINISHED_A; 369 s->init_num=0; 370 371 s->session->cipher=s->s3->tmp.new_cipher; 372#ifdef OPENSSL_NO_COMP 373 s->session->compress_meth=0; 374#else 375 if (s->s3->tmp.new_compression == NULL) 376 s->session->compress_meth=0; 377 else 378 s->session->compress_meth= 379 s->s3->tmp.new_compression->id; 380#endif 381 if (!s->method->ssl3_enc->setup_key_block(s)) 382 { 383 ret= -1; 384 goto end; 385 } 386 387 if (!s->method->ssl3_enc->change_cipher_state(s, 388 SSL3_CHANGE_CIPHER_CLIENT_WRITE)) 389 { 390 ret= -1; 391 goto end; 392 } 393 394 break; 395 396 case SSL3_ST_CW_FINISHED_A: 397 case SSL3_ST_CW_FINISHED_B: 398 ret=ssl3_send_finished(s, 399 SSL3_ST_CW_FINISHED_A,SSL3_ST_CW_FINISHED_B, 400 s->method->ssl3_enc->client_finished_label, 401 s->method->ssl3_enc->client_finished_label_len); 402 if (ret <= 0) goto end; 403 s->state=SSL3_ST_CW_FLUSH; 404 405 /* clear flags */ 406 s->s3->flags&= ~SSL3_FLAGS_POP_BUFFER; 407 if (s->hit) 408 { 409 s->s3->tmp.next_state=SSL_ST_OK; 410 if (s->s3->flags & SSL3_FLAGS_DELAY_CLIENT_FINISHED) 411 { 412 s->state=SSL_ST_OK; 413 s->s3->flags|=SSL3_FLAGS_POP_BUFFER; 414 s->s3->delay_buf_pop_ret=0; 415 } 416 } 417 else 418 { 419 s->s3->tmp.next_state=SSL3_ST_CR_FINISHED_A; 420 } 421 s->init_num=0; 422 break; 423 424 case SSL3_ST_CR_FINISHED_A: 425 case SSL3_ST_CR_FINISHED_B: 426 427 ret=ssl3_get_finished(s,SSL3_ST_CR_FINISHED_A, 428 SSL3_ST_CR_FINISHED_B); 429 if (ret <= 0) goto end; 430 431 if (s->hit) 432 s->state=SSL3_ST_CW_CHANGE_A; 433 else 434 s->state=SSL_ST_OK; 435 s->init_num=0; 436 break; 437 438 case SSL3_ST_CW_FLUSH: 439 /* number of bytes to be flushed */ 440 num1=BIO_ctrl(s->wbio,BIO_CTRL_INFO,0,NULL); 441 if (num1 > 0) 442 { 443 s->rwstate=SSL_WRITING; 444 num1=BIO_flush(s->wbio); 445 if (num1 <= 0) { ret= -1; goto end; } 446 s->rwstate=SSL_NOTHING; 447 } 448 449 s->state=s->s3->tmp.next_state; 450 break; 451 452 case SSL_ST_OK: 453 /* clean a few things up */ 454 ssl3_cleanup_key_block(s); 455 456 if (s->init_buf != NULL) 457 { 458 BUF_MEM_free(s->init_buf); 459 s->init_buf=NULL; 460 } 461 462 /* If we are not 'joining' the last two packets, 463 * remove the buffering now */ 464 if (!(s->s3->flags & SSL3_FLAGS_POP_BUFFER)) 465 ssl_free_wbio_buffer(s); 466 /* else do it later in ssl3_write */ 467 468 s->init_num=0; 469 s->new_session=0; 470 471 ssl_update_cache(s,SSL_SESS_CACHE_CLIENT); 472 if (s->hit) s->ctx->stats.sess_hit++; 473 474 ret=1; 475 /* s->server=0; */ 476 s->handshake_func=ssl3_connect; 477 s->ctx->stats.sess_connect_good++; 478 479 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_DONE,1); 480 481 goto end; 482 /* break; */ 483 484 default: 485 SSLerr(SSL_F_SSL3_CONNECT,SSL_R_UNKNOWN_STATE); 486 ret= -1; 487 goto end; 488 /* break; */ 489 } 490 491 /* did we do anything */ 492 if (!s->s3->tmp.reuse_message && !skip) 493 { 494 if (s->debug) 495 { 496 if ((ret=BIO_flush(s->wbio)) <= 0) 497 goto end; 498 } 499 500 if ((cb != NULL) && (s->state != state)) 501 { 502 new_state=s->state; 503 s->state=state; 504 cb(s,SSL_CB_CONNECT_LOOP,1); 505 s->state=new_state; 506 } 507 } 508 skip=0; 509 } 510end: 511 s->in_handshake--; 512 if (buf != NULL) 513 BUF_MEM_free(buf); 514 if (cb != NULL) 515 cb(s,SSL_CB_CONNECT_EXIT,ret); 516 return(ret); 517 } 518 519 520int ssl3_client_hello(SSL *s) 521 { 522 unsigned char *buf; 523 unsigned char *p,*d; 524 int i; 525 unsigned long Time,l; 526#ifndef OPENSSL_NO_COMP 527 int j; 528 SSL_COMP *comp; 529#endif 530 531 buf=(unsigned char *)s->init_buf->data; 532 if (s->state == SSL3_ST_CW_CLNT_HELLO_A) 533 { 534 if ((s->session == NULL) || 535 (s->session->ssl_version != s->version) || 536 (s->session->not_resumable)) 537 { 538 if (!ssl_get_new_session(s,0)) 539 goto err; 540 } 541 /* else use the pre-loaded session */ 542 543 p=s->s3->client_random; 544 Time=(unsigned long)time(NULL); /* Time */ 545 l2n(Time,p); 546 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0) 547 goto err; 548 549 /* Do the message type and length last */ 550 d=p= &(buf[4]); 551 552 *(p++)=s->version>>8; 553 *(p++)=s->version&0xff; 554 s->client_version=s->version; 555 556 /* Random stuff */ 557 memcpy(p,s->s3->client_random,SSL3_RANDOM_SIZE); 558 p+=SSL3_RANDOM_SIZE; 559 560 /* Session ID */ 561 if (s->new_session) 562 i=0; 563 else 564 i=s->session->session_id_length; 565 *(p++)=i; 566 if (i != 0) 567 { 568 if (i > (int)sizeof(s->session->session_id)) 569 { 570 SSLerr(SSL_F_SSL3_CLIENT_HELLO, ERR_R_INTERNAL_ERROR); 571 goto err; 572 } 573 memcpy(p,s->session->session_id,i); 574 p+=i; 575 } 576 577 /* Ciphers supported */ 578 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),0); 579 if (i == 0) 580 { 581 SSLerr(SSL_F_SSL3_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE); 582 goto err; 583 } 584 s2n(i,p); 585 p+=i; 586 587 /* COMPRESSION */ 588#ifdef OPENSSL_NO_COMP 589 *(p++)=1; 590#else 591 if (s->ctx->comp_methods == NULL) 592 j=0; 593 else 594 j=sk_SSL_COMP_num(s->ctx->comp_methods); 595 *(p++)=1+j; 596 for (i=0; i<j; i++) 597 { 598 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i); 599 *(p++)=comp->id; 600 } 601#endif 602 *(p++)=0; /* Add the NULL method */ 603 604 l=(p-d); 605 d=buf; 606 *(d++)=SSL3_MT_CLIENT_HELLO; 607 l2n3(l,d); 608 609 s->state=SSL3_ST_CW_CLNT_HELLO_B; 610 /* number of bytes to write */ 611 s->init_num=p-buf; 612 s->init_off=0; 613 } 614 615 /* SSL3_ST_CW_CLNT_HELLO_B */ 616 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 617err: 618 return(-1); 619 } 620 621int ssl3_get_server_hello(SSL *s) 622 { 623 STACK_OF(SSL_CIPHER) *sk; 624 SSL_CIPHER *c; 625 unsigned char *p,*d; 626 int i,al,ok; 627 unsigned int j; 628 long n; 629#ifndef OPENSSL_NO_COMP 630 SSL_COMP *comp; 631#endif 632 633 n=s->method->ssl_get_message(s, 634 SSL3_ST_CR_SRVR_HELLO_A, 635 SSL3_ST_CR_SRVR_HELLO_B, 636 -1, 637 300, /* ?? */ 638 &ok); 639 640 if (!ok) return((int)n); 641 642 if ( SSL_version(s) == DTLS1_VERSION) 643 { 644 if ( s->s3->tmp.message_type == DTLS1_MT_HELLO_VERIFY_REQUEST) 645 { 646 if ( s->d1->send_cookie == 0) 647 { 648 s->s3->tmp.reuse_message = 1; 649 return 1; 650 } 651 else /* already sent a cookie */ 652 { 653 al=SSL_AD_UNEXPECTED_MESSAGE; 654 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 655 goto f_err; 656 } 657 } 658 } 659 660 if ( s->s3->tmp.message_type != SSL3_MT_SERVER_HELLO) 661 { 662 al=SSL_AD_UNEXPECTED_MESSAGE; 663 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_MESSAGE_TYPE); 664 goto f_err; 665 } 666 667 d=p=(unsigned char *)s->init_msg; 668 669 if ((p[0] != (s->version>>8)) || (p[1] != (s->version&0xff))) 670 { 671 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_SSL_VERSION); 672 s->version=(s->version&0xff00)|p[1]; 673 al=SSL_AD_PROTOCOL_VERSION; 674 goto f_err; 675 } 676 p+=2; 677 678 /* load the server hello data */ 679 /* load the server random */ 680 memcpy(s->s3->server_random,p,SSL3_RANDOM_SIZE); 681 p+=SSL3_RANDOM_SIZE; 682 683 /* get the session-id */ 684 j= *(p++); 685 686 if ((j > sizeof s->session->session_id) || (j > SSL3_SESSION_ID_SIZE)) 687 { 688 al=SSL_AD_ILLEGAL_PARAMETER; 689 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_SSL3_SESSION_ID_TOO_LONG); 690 goto f_err; 691 } 692 693 if (j != 0 && j == s->session->session_id_length 694 && memcmp(p,s->session->session_id,j) == 0) 695 { 696 if(s->sid_ctx_length != s->session->sid_ctx_length 697 || memcmp(s->session->sid_ctx,s->sid_ctx,s->sid_ctx_length)) 698 { 699 /* actually a client application bug */ 700 al=SSL_AD_ILLEGAL_PARAMETER; 701 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_ATTEMPT_TO_REUSE_SESSION_IN_DIFFERENT_CONTEXT); 702 goto f_err; 703 } 704 s->hit=1; 705 } 706 else /* a miss or crap from the other end */ 707 { 708 /* If we were trying for session-id reuse, make a new 709 * SSL_SESSION so we don't stuff up other people */ 710 s->hit=0; 711 if (s->session->session_id_length > 0) 712 { 713 if (!ssl_get_new_session(s,0)) 714 { 715 al=SSL_AD_INTERNAL_ERROR; 716 goto f_err; 717 } 718 } 719 s->session->session_id_length=j; 720 memcpy(s->session->session_id,p,j); /* j could be 0 */ 721 } 722 p+=j; 723 c=ssl_get_cipher_by_char(s,p); 724 if (c == NULL) 725 { 726 /* unknown cipher */ 727 al=SSL_AD_ILLEGAL_PARAMETER; 728 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNKNOWN_CIPHER_RETURNED); 729 goto f_err; 730 } 731 p+=ssl_put_cipher_by_char(s,NULL,NULL); 732 733 sk=ssl_get_ciphers_by_id(s); 734 i=sk_SSL_CIPHER_find(sk,c); 735 if (i < 0) 736 { 737 /* we did not say we would use this cipher */ 738 al=SSL_AD_ILLEGAL_PARAMETER; 739 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_WRONG_CIPHER_RETURNED); 740 goto f_err; 741 } 742 743 /* Depending on the session caching (internal/external), the cipher 744 and/or cipher_id values may not be set. Make sure that 745 cipher_id is set and use it for comparison. */ 746 if (s->session->cipher) 747 s->session->cipher_id = s->session->cipher->id; 748 if (s->hit && (s->session->cipher_id != c->id)) 749 { 750 if (!(s->options & 751 SSL_OP_NETSCAPE_REUSE_CIPHER_CHANGE_BUG)) 752 { 753 al=SSL_AD_ILLEGAL_PARAMETER; 754 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_OLD_SESSION_CIPHER_NOT_RETURNED); 755 goto f_err; 756 } 757 } 758 s->s3->tmp.new_cipher=c; 759 760 /* lets get the compression algorithm */ 761 /* COMPRESSION */ 762#ifdef OPENSSL_NO_COMP 763 if (*(p++) != 0) 764 { 765 al=SSL_AD_ILLEGAL_PARAMETER; 766 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 767 goto f_err; 768 } 769#else 770 j= *(p++); 771 if (j == 0) 772 comp=NULL; 773 else 774 comp=ssl3_comp_find(s->ctx->comp_methods,j); 775 776 if ((j != 0) && (comp == NULL)) 777 { 778 al=SSL_AD_ILLEGAL_PARAMETER; 779 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_COMPRESSION_ALGORITHM); 780 goto f_err; 781 } 782 else 783 { 784 s->s3->tmp.new_compression=comp; 785 } 786#endif 787 788 if (p != (d+n)) 789 { 790 /* wrong packet length */ 791 al=SSL_AD_DECODE_ERROR; 792 SSLerr(SSL_F_SSL3_GET_SERVER_HELLO,SSL_R_BAD_PACKET_LENGTH); 793 goto err; 794 } 795 796 return(1); 797f_err: 798 ssl3_send_alert(s,SSL3_AL_FATAL,al); 799err: 800 return(-1); 801 } 802 803int ssl3_get_server_certificate(SSL *s) 804 { 805 int al,i,ok,ret= -1; 806 unsigned long n,nc,llen,l; 807 X509 *x=NULL; 808 const unsigned char *q,*p; 809 unsigned char *d; 810 STACK_OF(X509) *sk=NULL; 811 SESS_CERT *sc; 812 EVP_PKEY *pkey=NULL; 813 int need_cert = 1; /* VRS: 0=> will allow null cert if auth == KRB5 */ 814 815 n=s->method->ssl_get_message(s, 816 SSL3_ST_CR_CERT_A, 817 SSL3_ST_CR_CERT_B, 818 -1, 819 s->max_cert_list, 820 &ok); 821 822 if (!ok) return((int)n); 823 824 if (s->s3->tmp.message_type == SSL3_MT_SERVER_KEY_EXCHANGE) 825 { 826 s->s3->tmp.reuse_message=1; 827 return(1); 828 } 829 830 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE) 831 { 832 al=SSL_AD_UNEXPECTED_MESSAGE; 833 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_BAD_MESSAGE_TYPE); 834 goto f_err; 835 } 836 p=d=(unsigned char *)s->init_msg; 837 838 if ((sk=sk_X509_new_null()) == NULL) 839 { 840 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 841 goto err; 842 } 843 844 n2l3(p,llen); 845 if (llen+3 != n) 846 { 847 al=SSL_AD_DECODE_ERROR; 848 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_LENGTH_MISMATCH); 849 goto f_err; 850 } 851 for (nc=0; nc<llen; ) 852 { 853 n2l3(p,l); 854 if ((l+nc+3) > llen) 855 { 856 al=SSL_AD_DECODE_ERROR; 857 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 858 goto f_err; 859 } 860 861 q=p; 862 x=d2i_X509(NULL,&q,l); 863 if (x == NULL) 864 { 865 al=SSL_AD_BAD_CERTIFICATE; 866 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_ASN1_LIB); 867 goto f_err; 868 } 869 if (q != (p+l)) 870 { 871 al=SSL_AD_DECODE_ERROR; 872 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERT_LENGTH_MISMATCH); 873 goto f_err; 874 } 875 if (!sk_X509_push(sk,x)) 876 { 877 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,ERR_R_MALLOC_FAILURE); 878 goto err; 879 } 880 x=NULL; 881 nc+=l+3; 882 p=q; 883 } 884 885 i=ssl_verify_cert_chain(s,sk); 886 if ((s->verify_mode != SSL_VERIFY_NONE) && (!i) 887#ifndef OPENSSL_NO_KRB5 888 && (s->s3->tmp.new_cipher->algorithms & (SSL_MKEY_MASK|SSL_AUTH_MASK)) 889 != (SSL_aKRB5|SSL_kKRB5) 890#endif /* OPENSSL_NO_KRB5 */ 891 ) 892 { 893 al=ssl_verify_alarm_type(s->verify_result); 894 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE,SSL_R_CERTIFICATE_VERIFY_FAILED); 895 goto f_err; 896 } 897 ERR_clear_error(); /* but we keep s->verify_result */ 898 899 sc=ssl_sess_cert_new(); 900 if (sc == NULL) goto err; 901 902 if (s->session->sess_cert) ssl_sess_cert_free(s->session->sess_cert); 903 s->session->sess_cert=sc; 904 905 sc->cert_chain=sk; 906 /* Inconsistency alert: cert_chain does include the peer's 907 * certificate, which we don't include in s3_srvr.c */ 908 x=sk_X509_value(sk,0); 909 sk=NULL; 910 /* VRS 19990621: possible memory leak; sk=null ==> !sk_pop_free() @end*/ 911 912 pkey=X509_get_pubkey(x); 913 914 /* VRS: allow null cert if auth == KRB5 */ 915 need_cert = ((s->s3->tmp.new_cipher->algorithms 916 & (SSL_MKEY_MASK|SSL_AUTH_MASK)) 917 == (SSL_aKRB5|SSL_kKRB5))? 0: 1; 918 919#ifdef KSSL_DEBUG 920 printf("pkey,x = %p, %p\n", pkey,x); 921 printf("ssl_cert_type(x,pkey) = %d\n", ssl_cert_type(x,pkey)); 922 printf("cipher, alg, nc = %s, %lx, %d\n", s->s3->tmp.new_cipher->name, 923 s->s3->tmp.new_cipher->algorithms, need_cert); 924#endif /* KSSL_DEBUG */ 925 926 if (need_cert && ((pkey == NULL) || EVP_PKEY_missing_parameters(pkey))) 927 { 928 x=NULL; 929 al=SSL3_AL_FATAL; 930 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 931 SSL_R_UNABLE_TO_FIND_PUBLIC_KEY_PARAMETERS); 932 goto f_err; 933 } 934 935 i=ssl_cert_type(x,pkey); 936 if (need_cert && i < 0) 937 { 938 x=NULL; 939 al=SSL3_AL_FATAL; 940 SSLerr(SSL_F_SSL3_GET_SERVER_CERTIFICATE, 941 SSL_R_UNKNOWN_CERTIFICATE_TYPE); 942 goto f_err; 943 } 944 945 if (need_cert) 946 { 947 sc->peer_cert_type=i; 948 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 949 /* Why would the following ever happen? 950 * We just created sc a couple of lines ago. */ 951 if (sc->peer_pkeys[i].x509 != NULL) 952 X509_free(sc->peer_pkeys[i].x509); 953 sc->peer_pkeys[i].x509=x; 954 sc->peer_key= &(sc->peer_pkeys[i]); 955 956 if (s->session->peer != NULL) 957 X509_free(s->session->peer); 958 CRYPTO_add(&x->references,1,CRYPTO_LOCK_X509); 959 s->session->peer=x; 960 } 961 else 962 { 963 sc->peer_cert_type=i; 964 sc->peer_key= NULL; 965 966 if (s->session->peer != NULL) 967 X509_free(s->session->peer); 968 s->session->peer=NULL; 969 } 970 s->session->verify_result = s->verify_result; 971 972 x=NULL; 973 ret=1; 974 975 if (0) 976 { 977f_err: 978 ssl3_send_alert(s,SSL3_AL_FATAL,al); 979 } 980err: 981 EVP_PKEY_free(pkey); 982 X509_free(x); 983 sk_X509_pop_free(sk,X509_free); 984 return(ret); 985 } 986 987int ssl3_get_key_exchange(SSL *s) 988 { 989#ifndef OPENSSL_NO_RSA 990 unsigned char *q,md_buf[EVP_MAX_MD_SIZE*2]; 991#endif 992 EVP_MD_CTX md_ctx; 993 unsigned char *param,*p; 994 int al,i,j,param_len,ok; 995 long n,alg; 996 EVP_PKEY *pkey=NULL; 997#ifndef OPENSSL_NO_RSA 998 RSA *rsa=NULL; 999#endif 1000#ifndef OPENSSL_NO_DH 1001 DH *dh=NULL; 1002#endif 1003#ifndef OPENSSL_NO_ECDH 1004 EC_KEY *ecdh = NULL; 1005 BN_CTX *bn_ctx = NULL; 1006 EC_POINT *srvr_ecpoint = NULL; 1007 int curve_nid = 0; 1008 int encoded_pt_len = 0; 1009#endif 1010 1011 /* use same message size as in ssl3_get_certificate_request() 1012 * as ServerKeyExchange message may be skipped */ 1013 n=s->method->ssl_get_message(s, 1014 SSL3_ST_CR_KEY_EXCH_A, 1015 SSL3_ST_CR_KEY_EXCH_B, 1016 -1, 1017 s->max_cert_list, 1018 &ok); 1019 1020 if (!ok) return((int)n); 1021 1022 if (s->s3->tmp.message_type != SSL3_MT_SERVER_KEY_EXCHANGE) 1023 { 1024 s->s3->tmp.reuse_message=1; 1025 return(1); 1026 } 1027 1028 param=p=(unsigned char *)s->init_msg; 1029 1030 if (s->session->sess_cert != NULL) 1031 { 1032#ifndef OPENSSL_NO_RSA 1033 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1034 { 1035 RSA_free(s->session->sess_cert->peer_rsa_tmp); 1036 s->session->sess_cert->peer_rsa_tmp=NULL; 1037 } 1038#endif 1039#ifndef OPENSSL_NO_DH 1040 if (s->session->sess_cert->peer_dh_tmp) 1041 { 1042 DH_free(s->session->sess_cert->peer_dh_tmp); 1043 s->session->sess_cert->peer_dh_tmp=NULL; 1044 } 1045#endif 1046#ifndef OPENSSL_NO_ECDH 1047 if (s->session->sess_cert->peer_ecdh_tmp) 1048 { 1049 EC_KEY_free(s->session->sess_cert->peer_ecdh_tmp); 1050 s->session->sess_cert->peer_ecdh_tmp=NULL; 1051 } 1052#endif 1053 } 1054 else 1055 { 1056 s->session->sess_cert=ssl_sess_cert_new(); 1057 } 1058 1059 param_len=0; 1060 alg=s->s3->tmp.new_cipher->algorithms; 1061 EVP_MD_CTX_init(&md_ctx); 1062 1063#ifndef OPENSSL_NO_RSA 1064 if (alg & SSL_kRSA) 1065 { 1066 if ((rsa=RSA_new()) == NULL) 1067 { 1068 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1069 goto err; 1070 } 1071 n2s(p,i); 1072 param_len=i+2; 1073 if (param_len > n) 1074 { 1075 al=SSL_AD_DECODE_ERROR; 1076 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_MODULUS_LENGTH); 1077 goto f_err; 1078 } 1079 if (!(rsa->n=BN_bin2bn(p,i,rsa->n))) 1080 { 1081 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1082 goto err; 1083 } 1084 p+=i; 1085 1086 n2s(p,i); 1087 param_len+=i+2; 1088 if (param_len > n) 1089 { 1090 al=SSL_AD_DECODE_ERROR; 1091 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_E_LENGTH); 1092 goto f_err; 1093 } 1094 if (!(rsa->e=BN_bin2bn(p,i,rsa->e))) 1095 { 1096 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1097 goto err; 1098 } 1099 p+=i; 1100 n-=param_len; 1101 1102 /* this should be because we are using an export cipher */ 1103 if (alg & SSL_aRSA) 1104 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1105 else 1106 { 1107 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1108 goto err; 1109 } 1110 s->session->sess_cert->peer_rsa_tmp=rsa; 1111 rsa=NULL; 1112 } 1113#else /* OPENSSL_NO_RSA */ 1114 if (0) 1115 ; 1116#endif 1117#ifndef OPENSSL_NO_DH 1118 else if (alg & SSL_kEDH) 1119 { 1120 if ((dh=DH_new()) == NULL) 1121 { 1122 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_DH_LIB); 1123 goto err; 1124 } 1125 n2s(p,i); 1126 param_len=i+2; 1127 if (param_len > n) 1128 { 1129 al=SSL_AD_DECODE_ERROR; 1130 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_P_LENGTH); 1131 goto f_err; 1132 } 1133 if (!(dh->p=BN_bin2bn(p,i,NULL))) 1134 { 1135 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1136 goto err; 1137 } 1138 p+=i; 1139 1140 n2s(p,i); 1141 param_len+=i+2; 1142 if (param_len > n) 1143 { 1144 al=SSL_AD_DECODE_ERROR; 1145 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_G_LENGTH); 1146 goto f_err; 1147 } 1148 if (!(dh->g=BN_bin2bn(p,i,NULL))) 1149 { 1150 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1151 goto err; 1152 } 1153 p+=i; 1154 1155 n2s(p,i); 1156 param_len+=i+2; 1157 if (param_len > n) 1158 { 1159 al=SSL_AD_DECODE_ERROR; 1160 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_DH_PUB_KEY_LENGTH); 1161 goto f_err; 1162 } 1163 if (!(dh->pub_key=BN_bin2bn(p,i,NULL))) 1164 { 1165 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_BN_LIB); 1166 goto err; 1167 } 1168 p+=i; 1169 n-=param_len; 1170 1171#ifndef OPENSSL_NO_RSA 1172 if (alg & SSL_aRSA) 1173 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1174#else 1175 if (0) 1176 ; 1177#endif 1178#ifndef OPENSSL_NO_DSA 1179 else if (alg & SSL_aDSS) 1180 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_DSA_SIGN].x509); 1181#endif 1182 /* else anonymous DH, so no certificate or pkey. */ 1183 1184 s->session->sess_cert->peer_dh_tmp=dh; 1185 dh=NULL; 1186 } 1187 else if ((alg & SSL_kDHr) || (alg & SSL_kDHd)) 1188 { 1189 al=SSL_AD_ILLEGAL_PARAMETER; 1190 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1191 goto f_err; 1192 } 1193#endif /* !OPENSSL_NO_DH */ 1194 1195#ifndef OPENSSL_NO_ECDH 1196 else if (alg & SSL_kECDHE) 1197 { 1198 EC_GROUP *ngroup; 1199 const EC_GROUP *group; 1200 1201 if ((ecdh=EC_KEY_new()) == NULL) 1202 { 1203 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1204 goto err; 1205 } 1206 1207 /* Extract elliptic curve parameters and the 1208 * server's ephemeral ECDH public key. 1209 * Keep accumulating lengths of various components in 1210 * param_len and make sure it never exceeds n. 1211 */ 1212 1213 /* XXX: For now we only support named (not generic) curves 1214 * and the ECParameters in this case is just three bytes. 1215 */ 1216 param_len=3; 1217 if ((param_len > n) || 1218 (*p != NAMED_CURVE_TYPE) || 1219 ((curve_nid = curve_id2nid(*(p + 2))) == 0)) 1220 { 1221 al=SSL_AD_INTERNAL_ERROR; 1222 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_ECDH_PARAMETERS); 1223 goto f_err; 1224 } 1225 1226 ngroup = EC_GROUP_new_by_curve_name(curve_nid); 1227 if (ngroup == NULL) 1228 { 1229 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1230 goto err; 1231 } 1232 if (EC_KEY_set_group(ecdh, ngroup) == 0) 1233 { 1234 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_EC_LIB); 1235 goto err; 1236 } 1237 EC_GROUP_free(ngroup); 1238 1239 group = EC_KEY_get0_group(ecdh); 1240 1241 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && 1242 (EC_GROUP_get_degree(group) > 163)) 1243 { 1244 al=SSL_AD_EXPORT_RESTRICTION; 1245 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_ECGROUP_TOO_LARGE_FOR_CIPHER); 1246 goto f_err; 1247 } 1248 1249 p+=3; 1250 1251 /* Next, get the encoded ECPoint */ 1252 if (((srvr_ecpoint = EC_POINT_new(group)) == NULL) || 1253 ((bn_ctx = BN_CTX_new()) == NULL)) 1254 { 1255 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1256 goto err; 1257 } 1258 1259 encoded_pt_len = *p; /* length of encoded point */ 1260 p+=1; 1261 param_len += (1 + encoded_pt_len); 1262 if ((param_len > n) || 1263 (EC_POINT_oct2point(group, srvr_ecpoint, 1264 p, encoded_pt_len, bn_ctx) == 0)) 1265 { 1266 al=SSL_AD_DECODE_ERROR; 1267 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_ECPOINT); 1268 goto f_err; 1269 } 1270 1271 n-=param_len; 1272 p+=encoded_pt_len; 1273 1274 /* The ECC/TLS specification does not mention 1275 * the use of DSA to sign ECParameters in the server 1276 * key exchange message. We do support RSA and ECDSA. 1277 */ 1278 if (0) ; 1279#ifndef OPENSSL_NO_RSA 1280 else if (alg & SSL_aRSA) 1281 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1282#endif 1283#ifndef OPENSSL_NO_ECDSA 1284 else if (alg & SSL_aECDSA) 1285 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1286#endif 1287 /* else anonymous ECDH, so no certificate or pkey. */ 1288 EC_KEY_set_public_key(ecdh, srvr_ecpoint); 1289 s->session->sess_cert->peer_ecdh_tmp=ecdh; 1290 ecdh=NULL; 1291 BN_CTX_free(bn_ctx); 1292 EC_POINT_free(srvr_ecpoint); 1293 srvr_ecpoint = NULL; 1294 } 1295 else if (alg & SSL_kECDH) 1296 { 1297 al=SSL_AD_UNEXPECTED_MESSAGE; 1298 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_UNEXPECTED_MESSAGE); 1299 goto f_err; 1300 } 1301#endif /* !OPENSSL_NO_ECDH */ 1302 if (alg & SSL_aFZA) 1303 { 1304 al=SSL_AD_HANDSHAKE_FAILURE; 1305 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_TRIED_TO_USE_UNSUPPORTED_CIPHER); 1306 goto f_err; 1307 } 1308 1309 1310 /* p points to the next byte, there are 'n' bytes left */ 1311 1312 /* if it was signed, check the signature */ 1313 if (pkey != NULL) 1314 { 1315 n2s(p,i); 1316 n-=2; 1317 j=EVP_PKEY_size(pkey); 1318 1319 if ((i != n) || (n > j) || (n <= 0)) 1320 { 1321 /* wrong packet length */ 1322 al=SSL_AD_DECODE_ERROR; 1323 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_WRONG_SIGNATURE_LENGTH); 1324 goto f_err; 1325 } 1326 1327#ifndef OPENSSL_NO_RSA 1328 if (pkey->type == EVP_PKEY_RSA) 1329 { 1330 int num; 1331 1332 j=0; 1333 q=md_buf; 1334 for (num=2; num > 0; num--) 1335 { 1336 EVP_DigestInit_ex(&md_ctx,(num == 2) 1337 ?s->ctx->md5:s->ctx->sha1, NULL); 1338 EVP_DigestUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1339 EVP_DigestUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1340 EVP_DigestUpdate(&md_ctx,param,param_len); 1341 EVP_DigestFinal_ex(&md_ctx,q,(unsigned int *)&i); 1342 q+=i; 1343 j+=i; 1344 } 1345 i=RSA_verify(NID_md5_sha1, md_buf, j, p, n, 1346 pkey->pkey.rsa); 1347 if (i < 0) 1348 { 1349 al=SSL_AD_DECRYPT_ERROR; 1350 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_RSA_DECRYPT); 1351 goto f_err; 1352 } 1353 if (i == 0) 1354 { 1355 /* bad signature */ 1356 al=SSL_AD_DECRYPT_ERROR; 1357 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1358 goto f_err; 1359 } 1360 } 1361 else 1362#endif 1363#ifndef OPENSSL_NO_DSA 1364 if (pkey->type == EVP_PKEY_DSA) 1365 { 1366 /* lets do DSS */ 1367 EVP_VerifyInit_ex(&md_ctx,EVP_dss1(), NULL); 1368 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1369 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1370 EVP_VerifyUpdate(&md_ctx,param,param_len); 1371 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey)) 1372 { 1373 /* bad signature */ 1374 al=SSL_AD_DECRYPT_ERROR; 1375 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1376 goto f_err; 1377 } 1378 } 1379 else 1380#endif 1381#ifndef OPENSSL_NO_ECDSA 1382 if (pkey->type == EVP_PKEY_EC) 1383 { 1384 /* let's do ECDSA */ 1385 EVP_VerifyInit_ex(&md_ctx,EVP_ecdsa(), NULL); 1386 EVP_VerifyUpdate(&md_ctx,&(s->s3->client_random[0]),SSL3_RANDOM_SIZE); 1387 EVP_VerifyUpdate(&md_ctx,&(s->s3->server_random[0]),SSL3_RANDOM_SIZE); 1388 EVP_VerifyUpdate(&md_ctx,param,param_len); 1389 if (!EVP_VerifyFinal(&md_ctx,p,(int)n,pkey)) 1390 { 1391 /* bad signature */ 1392 al=SSL_AD_DECRYPT_ERROR; 1393 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_BAD_SIGNATURE); 1394 goto f_err; 1395 } 1396 } 1397 else 1398#endif 1399 { 1400 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1401 goto err; 1402 } 1403 } 1404 else 1405 { 1406 /* still data left over */ 1407 if (!(alg & SSL_aNULL)) 1408 { 1409 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1410 goto err; 1411 } 1412 if (n != 0) 1413 { 1414 al=SSL_AD_DECODE_ERROR; 1415 SSLerr(SSL_F_SSL3_GET_KEY_EXCHANGE,SSL_R_EXTRA_DATA_IN_MESSAGE); 1416 goto f_err; 1417 } 1418 } 1419 EVP_PKEY_free(pkey); 1420 EVP_MD_CTX_cleanup(&md_ctx); 1421 return(1); 1422f_err: 1423 ssl3_send_alert(s,SSL3_AL_FATAL,al); 1424err: 1425 EVP_PKEY_free(pkey); 1426#ifndef OPENSSL_NO_RSA 1427 if (rsa != NULL) 1428 RSA_free(rsa); 1429#endif 1430#ifndef OPENSSL_NO_DH 1431 if (dh != NULL) 1432 DH_free(dh); 1433#endif 1434#ifndef OPENSSL_NO_ECDH 1435 BN_CTX_free(bn_ctx); 1436 EC_POINT_free(srvr_ecpoint); 1437 if (ecdh != NULL) 1438 EC_KEY_free(ecdh); 1439#endif 1440 EVP_MD_CTX_cleanup(&md_ctx); 1441 return(-1); 1442 } 1443 1444int ssl3_get_certificate_request(SSL *s) 1445 { 1446 int ok,ret=0; 1447 unsigned long n,nc,l; 1448 unsigned int llen,ctype_num,i; 1449 X509_NAME *xn=NULL; 1450 const unsigned char *p,*q; 1451 unsigned char *d; 1452 STACK_OF(X509_NAME) *ca_sk=NULL; 1453 1454 n=s->method->ssl_get_message(s, 1455 SSL3_ST_CR_CERT_REQ_A, 1456 SSL3_ST_CR_CERT_REQ_B, 1457 -1, 1458 s->max_cert_list, 1459 &ok); 1460 1461 if (!ok) return((int)n); 1462 1463 s->s3->tmp.cert_req=0; 1464 1465 if (s->s3->tmp.message_type == SSL3_MT_SERVER_DONE) 1466 { 1467 s->s3->tmp.reuse_message=1; 1468 return(1); 1469 } 1470 1471 if (s->s3->tmp.message_type != SSL3_MT_CERTIFICATE_REQUEST) 1472 { 1473 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1474 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_WRONG_MESSAGE_TYPE); 1475 goto err; 1476 } 1477 1478 /* TLS does not like anon-DH with client cert */ 1479 if (s->version > SSL3_VERSION) 1480 { 1481 l=s->s3->tmp.new_cipher->algorithms; 1482 if (l & SSL_aNULL) 1483 { 1484 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_UNEXPECTED_MESSAGE); 1485 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_TLS_CLIENT_CERT_REQ_WITH_ANON_CIPHER); 1486 goto err; 1487 } 1488 } 1489 1490 p=d=(unsigned char *)s->init_msg; 1491 1492 if ((ca_sk=sk_X509_NAME_new(ca_dn_cmp)) == NULL) 1493 { 1494 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1495 goto err; 1496 } 1497 1498 /* get the certificate types */ 1499 ctype_num= *(p++); 1500 if (ctype_num > SSL3_CT_NUMBER) 1501 ctype_num=SSL3_CT_NUMBER; 1502 for (i=0; i<ctype_num; i++) 1503 s->s3->tmp.ctype[i]= p[i]; 1504 p+=ctype_num; 1505 1506 /* get the CA RDNs */ 1507 n2s(p,llen); 1508#if 0 1509{ 1510FILE *out; 1511out=fopen("/tmp/vsign.der","w"); 1512fwrite(p,1,llen,out); 1513fclose(out); 1514} 1515#endif 1516 1517 if ((llen+ctype_num+2+1) != n) 1518 { 1519 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1520 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_LENGTH_MISMATCH); 1521 goto err; 1522 } 1523 1524 for (nc=0; nc<llen; ) 1525 { 1526 n2s(p,l); 1527 if ((l+nc+2) > llen) 1528 { 1529 if ((s->options & SSL_OP_NETSCAPE_CA_DN_BUG)) 1530 goto cont; /* netscape bugs */ 1531 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1532 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_TOO_LONG); 1533 goto err; 1534 } 1535 1536 q=p; 1537 1538 if ((xn=d2i_X509_NAME(NULL,&q,l)) == NULL) 1539 { 1540 /* If netscape tolerance is on, ignore errors */ 1541 if (s->options & SSL_OP_NETSCAPE_CA_DN_BUG) 1542 goto cont; 1543 else 1544 { 1545 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1546 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_ASN1_LIB); 1547 goto err; 1548 } 1549 } 1550 1551 if (q != (p+l)) 1552 { 1553 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1554 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,SSL_R_CA_DN_LENGTH_MISMATCH); 1555 goto err; 1556 } 1557 if (!sk_X509_NAME_push(ca_sk,xn)) 1558 { 1559 SSLerr(SSL_F_SSL3_GET_CERTIFICATE_REQUEST,ERR_R_MALLOC_FAILURE); 1560 goto err; 1561 } 1562 1563 p+=l; 1564 nc+=l+2; 1565 } 1566 1567 if (0) 1568 { 1569cont: 1570 ERR_clear_error(); 1571 } 1572 1573 /* we should setup a certificate to return.... */ 1574 s->s3->tmp.cert_req=1; 1575 s->s3->tmp.ctype_num=ctype_num; 1576 if (s->s3->tmp.ca_names != NULL) 1577 sk_X509_NAME_pop_free(s->s3->tmp.ca_names,X509_NAME_free); 1578 s->s3->tmp.ca_names=ca_sk; 1579 ca_sk=NULL; 1580 1581 ret=1; 1582err: 1583 if (ca_sk != NULL) sk_X509_NAME_pop_free(ca_sk,X509_NAME_free); 1584 return(ret); 1585 } 1586 1587static int ca_dn_cmp(const X509_NAME * const *a, const X509_NAME * const *b) 1588 { 1589 return(X509_NAME_cmp(*a,*b)); 1590 } 1591 1592int ssl3_get_server_done(SSL *s) 1593 { 1594 int ok,ret=0; 1595 long n; 1596 1597 n=s->method->ssl_get_message(s, 1598 SSL3_ST_CR_SRVR_DONE_A, 1599 SSL3_ST_CR_SRVR_DONE_B, 1600 SSL3_MT_SERVER_DONE, 1601 30, /* should be very small, like 0 :-) */ 1602 &ok); 1603 1604 if (!ok) return((int)n); 1605 if (n > 0) 1606 { 1607 /* should contain no data */ 1608 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_DECODE_ERROR); 1609 SSLerr(SSL_F_SSL3_GET_SERVER_DONE,SSL_R_LENGTH_MISMATCH); 1610 return -1; 1611 } 1612 ret=1; 1613 return(ret); 1614 } 1615 1616 1617int ssl3_send_client_key_exchange(SSL *s) 1618 { 1619 unsigned char *p,*d; 1620 int n; 1621 unsigned long l; 1622#ifndef OPENSSL_NO_RSA 1623 unsigned char *q; 1624 EVP_PKEY *pkey=NULL; 1625#endif 1626#ifndef OPENSSL_NO_KRB5 1627 KSSL_ERR kssl_err; 1628#endif /* OPENSSL_NO_KRB5 */ 1629#ifndef OPENSSL_NO_ECDH 1630 EC_KEY *clnt_ecdh = NULL; 1631 const EC_POINT *srvr_ecpoint = NULL; 1632 EVP_PKEY *srvr_pub_pkey = NULL; 1633 unsigned char *encodedPoint = NULL; 1634 int encoded_pt_len = 0; 1635 BN_CTX * bn_ctx = NULL; 1636#endif 1637 1638 if (s->state == SSL3_ST_CW_KEY_EXCH_A) 1639 { 1640 d=(unsigned char *)s->init_buf->data; 1641 p= &(d[4]); 1642 1643 l=s->s3->tmp.new_cipher->algorithms; 1644 1645 /* Fool emacs indentation */ 1646 if (0) {} 1647#ifndef OPENSSL_NO_RSA 1648 else if (l & SSL_kRSA) 1649 { 1650 RSA *rsa; 1651 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 1652 1653 if (s->session->sess_cert->peer_rsa_tmp != NULL) 1654 rsa=s->session->sess_cert->peer_rsa_tmp; 1655 else 1656 { 1657 pkey=X509_get_pubkey(s->session->sess_cert->peer_pkeys[SSL_PKEY_RSA_ENC].x509); 1658 if ((pkey == NULL) || 1659 (pkey->type != EVP_PKEY_RSA) || 1660 (pkey->pkey.rsa == NULL)) 1661 { 1662 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_INTERNAL_ERROR); 1663 goto err; 1664 } 1665 rsa=pkey->pkey.rsa; 1666 EVP_PKEY_free(pkey); 1667 } 1668 1669 tmp_buf[0]=s->client_version>>8; 1670 tmp_buf[1]=s->client_version&0xff; 1671 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 1672 goto err; 1673 1674 s->session->master_key_length=sizeof tmp_buf; 1675 1676 q=p; 1677 /* Fix buf for TLS and beyond */ 1678 if (s->version > SSL3_VERSION) 1679 p+=2; 1680 n=RSA_public_encrypt(sizeof tmp_buf, 1681 tmp_buf,p,rsa,RSA_PKCS1_PADDING); 1682#ifdef PKCS1_CHECK 1683 if (s->options & SSL_OP_PKCS1_CHECK_1) p[1]++; 1684 if (s->options & SSL_OP_PKCS1_CHECK_2) tmp_buf[0]=0x70; 1685#endif 1686 if (n <= 0) 1687 { 1688 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_BAD_RSA_ENCRYPT); 1689 goto err; 1690 } 1691 1692 /* Fix buf for TLS and beyond */ 1693 if (s->version > SSL3_VERSION) 1694 { 1695 s2n(n,q); 1696 n+=2; 1697 } 1698 1699 s->session->master_key_length= 1700 s->method->ssl3_enc->generate_master_secret(s, 1701 s->session->master_key, 1702 tmp_buf,sizeof tmp_buf); 1703 OPENSSL_cleanse(tmp_buf,sizeof tmp_buf); 1704 } 1705#endif 1706#ifndef OPENSSL_NO_KRB5 1707 else if (l & SSL_kKRB5) 1708 { 1709 krb5_error_code krb5rc; 1710 KSSL_CTX *kssl_ctx = s->kssl_ctx; 1711 /* krb5_data krb5_ap_req; */ 1712 krb5_data *enc_ticket; 1713 krb5_data authenticator, *authp = NULL; 1714 EVP_CIPHER_CTX ciph_ctx; 1715 EVP_CIPHER *enc = NULL; 1716 unsigned char iv[EVP_MAX_IV_LENGTH]; 1717 unsigned char tmp_buf[SSL_MAX_MASTER_KEY_LENGTH]; 1718 unsigned char epms[SSL_MAX_MASTER_KEY_LENGTH 1719 + EVP_MAX_IV_LENGTH]; 1720 int padl, outl = sizeof(epms); 1721 1722 EVP_CIPHER_CTX_init(&ciph_ctx); 1723 1724#ifdef KSSL_DEBUG 1725 printf("ssl3_send_client_key_exchange(%lx & %lx)\n", 1726 l, SSL_kKRB5); 1727#endif /* KSSL_DEBUG */ 1728 1729 authp = NULL; 1730#ifdef KRB5SENDAUTH 1731 if (KRB5SENDAUTH) authp = &authenticator; 1732#endif /* KRB5SENDAUTH */ 1733 1734 krb5rc = kssl_cget_tkt(kssl_ctx, &enc_ticket, authp, 1735 &kssl_err); 1736 enc = kssl_map_enc(kssl_ctx->enctype); 1737 if (enc == NULL) 1738 goto err; 1739#ifdef KSSL_DEBUG 1740 { 1741 printf("kssl_cget_tkt rtn %d\n", krb5rc); 1742 if (krb5rc && kssl_err.text) 1743 printf("kssl_cget_tkt kssl_err=%s\n", kssl_err.text); 1744 } 1745#endif /* KSSL_DEBUG */ 1746 1747 if (krb5rc) 1748 { 1749 ssl3_send_alert(s,SSL3_AL_FATAL, 1750 SSL_AD_HANDSHAKE_FAILURE); 1751 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 1752 kssl_err.reason); 1753 goto err; 1754 } 1755 1756 /* 20010406 VRS - Earlier versions used KRB5 AP_REQ 1757 ** in place of RFC 2712 KerberosWrapper, as in: 1758 ** 1759 ** Send ticket (copy to *p, set n = length) 1760 ** n = krb5_ap_req.length; 1761 ** memcpy(p, krb5_ap_req.data, krb5_ap_req.length); 1762 ** if (krb5_ap_req.data) 1763 ** kssl_krb5_free_data_contents(NULL,&krb5_ap_req); 1764 ** 1765 ** Now using real RFC 2712 KerberosWrapper 1766 ** (Thanks to Simon Wilkinson <sxw@sxw.org.uk>) 1767 ** Note: 2712 "opaque" types are here replaced 1768 ** with a 2-byte length followed by the value. 1769 ** Example: 1770 ** KerberosWrapper= xx xx asn1ticket 0 0 xx xx encpms 1771 ** Where "xx xx" = length bytes. Shown here with 1772 ** optional authenticator omitted. 1773 */ 1774 1775 /* KerberosWrapper.Ticket */ 1776 s2n(enc_ticket->length,p); 1777 memcpy(p, enc_ticket->data, enc_ticket->length); 1778 p+= enc_ticket->length; 1779 n = enc_ticket->length + 2; 1780 1781 /* KerberosWrapper.Authenticator */ 1782 if (authp && authp->length) 1783 { 1784 s2n(authp->length,p); 1785 memcpy(p, authp->data, authp->length); 1786 p+= authp->length; 1787 n+= authp->length + 2; 1788 1789 free(authp->data); 1790 authp->data = NULL; 1791 authp->length = 0; 1792 } 1793 else 1794 { 1795 s2n(0,p);/* null authenticator length */ 1796 n+=2; 1797 } 1798 1799 tmp_buf[0]=s->client_version>>8; 1800 tmp_buf[1]=s->client_version&0xff; 1801 if (RAND_bytes(&(tmp_buf[2]),sizeof tmp_buf-2) <= 0) 1802 goto err; 1803 1804 /* 20010420 VRS. Tried it this way; failed. 1805 ** EVP_EncryptInit_ex(&ciph_ctx,enc, NULL,NULL); 1806 ** EVP_CIPHER_CTX_set_key_length(&ciph_ctx, 1807 ** kssl_ctx->length); 1808 ** EVP_EncryptInit_ex(&ciph_ctx,NULL, key,iv); 1809 */ 1810 1811 memset(iv, 0, sizeof iv); /* per RFC 1510 */ 1812 EVP_EncryptInit_ex(&ciph_ctx,enc, NULL, 1813 kssl_ctx->key,iv); 1814 EVP_EncryptUpdate(&ciph_ctx,epms,&outl,tmp_buf, 1815 sizeof tmp_buf); 1816 EVP_EncryptFinal_ex(&ciph_ctx,&(epms[outl]),&padl); 1817 outl += padl; 1818 if (outl > sizeof epms) 1819 { 1820 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_INTERNAL_ERROR); 1821 goto err; 1822 } 1823 EVP_CIPHER_CTX_cleanup(&ciph_ctx); 1824 1825 /* KerberosWrapper.EncryptedPreMasterSecret */ 1826 s2n(outl,p); 1827 memcpy(p, epms, outl); 1828 p+=outl; 1829 n+=outl + 2; 1830 1831 s->session->master_key_length= 1832 s->method->ssl3_enc->generate_master_secret(s, 1833 s->session->master_key, 1834 tmp_buf, sizeof tmp_buf); 1835 1836 OPENSSL_cleanse(tmp_buf, sizeof tmp_buf); 1837 OPENSSL_cleanse(epms, outl); 1838 } 1839#endif 1840#ifndef OPENSSL_NO_DH 1841 else if (l & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 1842 { 1843 DH *dh_srvr,*dh_clnt; 1844 1845 if (s->session->sess_cert->peer_dh_tmp != NULL) 1846 dh_srvr=s->session->sess_cert->peer_dh_tmp; 1847 else 1848 { 1849 /* we get them from the cert */ 1850 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 1851 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,SSL_R_UNABLE_TO_FIND_DH_PARAMETERS); 1852 goto err; 1853 } 1854 1855 /* generate a new random key */ 1856 if ((dh_clnt=DHparams_dup(dh_srvr)) == NULL) 1857 { 1858 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 1859 goto err; 1860 } 1861 if (!DH_generate_key(dh_clnt)) 1862 { 1863 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 1864 goto err; 1865 } 1866 1867 /* use the 'p' output buffer for the DH key, but 1868 * make sure to clear it out afterwards */ 1869 1870 n=DH_compute_key(p,dh_srvr->pub_key,dh_clnt); 1871 1872 if (n <= 0) 1873 { 1874 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_DH_LIB); 1875 goto err; 1876 } 1877 1878 /* generate master key from the result */ 1879 s->session->master_key_length= 1880 s->method->ssl3_enc->generate_master_secret(s, 1881 s->session->master_key,p,n); 1882 /* clean up */ 1883 memset(p,0,n); 1884 1885 /* send off the data */ 1886 n=BN_num_bytes(dh_clnt->pub_key); 1887 s2n(n,p); 1888 BN_bn2bin(dh_clnt->pub_key,p); 1889 n+=2; 1890 1891 DH_free(dh_clnt); 1892 1893 /* perhaps clean things up a bit EAY EAY EAY EAY*/ 1894 } 1895#endif 1896 1897#ifndef OPENSSL_NO_ECDH 1898 else if ((l & SSL_kECDH) || (l & SSL_kECDHE)) 1899 { 1900 const EC_GROUP *srvr_group = NULL; 1901 EC_KEY *tkey; 1902 int ecdh_clnt_cert = 0; 1903 int field_size = 0; 1904 1905 /* Did we send out the client's 1906 * ECDH share for use in premaster 1907 * computation as part of client certificate? 1908 * If so, set ecdh_clnt_cert to 1. 1909 */ 1910 if ((l & SSL_kECDH) && (s->cert != NULL)) 1911 { 1912 /* XXX: For now, we do not support client 1913 * authentication using ECDH certificates. 1914 * To add such support, one needs to add 1915 * code that checks for appropriate 1916 * conditions and sets ecdh_clnt_cert to 1. 1917 * For example, the cert have an ECC 1918 * key on the same curve as the server's 1919 * and the key should be authorized for 1920 * key agreement. 1921 * 1922 * One also needs to add code in ssl3_connect 1923 * to skip sending the certificate verify 1924 * message. 1925 * 1926 * if ((s->cert->key->privatekey != NULL) && 1927 * (s->cert->key->privatekey->type == 1928 * EVP_PKEY_EC) && ...) 1929 * ecdh_clnt_cert = 1; 1930 */ 1931 } 1932 1933 if (s->session->sess_cert->peer_ecdh_tmp != NULL) 1934 { 1935 tkey = s->session->sess_cert->peer_ecdh_tmp; 1936 } 1937 else 1938 { 1939 /* Get the Server Public Key from Cert */ 1940 srvr_pub_pkey = X509_get_pubkey(s->session-> \ 1941 sess_cert->peer_pkeys[SSL_PKEY_ECC].x509); 1942 if ((srvr_pub_pkey == NULL) || 1943 (srvr_pub_pkey->type != EVP_PKEY_EC) || 1944 (srvr_pub_pkey->pkey.ec == NULL)) 1945 { 1946 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 1947 ERR_R_INTERNAL_ERROR); 1948 goto err; 1949 } 1950 1951 tkey = srvr_pub_pkey->pkey.ec; 1952 } 1953 1954 srvr_group = EC_KEY_get0_group(tkey); 1955 srvr_ecpoint = EC_KEY_get0_public_key(tkey); 1956 1957 if ((srvr_group == NULL) || (srvr_ecpoint == NULL)) 1958 { 1959 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 1960 ERR_R_INTERNAL_ERROR); 1961 goto err; 1962 } 1963 1964 if ((clnt_ecdh=EC_KEY_new()) == NULL) 1965 { 1966 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1967 goto err; 1968 } 1969 1970 if (!EC_KEY_set_group(clnt_ecdh, srvr_group)) 1971 { 1972 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 1973 goto err; 1974 } 1975 if (ecdh_clnt_cert) 1976 { 1977 /* Reuse key info from our certificate 1978 * We only need our private key to perform 1979 * the ECDH computation. 1980 */ 1981 const BIGNUM *priv_key; 1982 tkey = s->cert->key->privatekey->pkey.ec; 1983 priv_key = EC_KEY_get0_private_key(tkey); 1984 if (priv_key == NULL) 1985 { 1986 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 1987 goto err; 1988 } 1989 if (!EC_KEY_set_private_key(clnt_ecdh, priv_key)) 1990 { 1991 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_EC_LIB); 1992 goto err; 1993 } 1994 } 1995 else 1996 { 1997 /* Generate a new ECDH key pair */ 1998 if (!(EC_KEY_generate_key(clnt_ecdh))) 1999 { 2000 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, ERR_R_ECDH_LIB); 2001 goto err; 2002 } 2003 } 2004 2005 /* use the 'p' output buffer for the ECDH key, but 2006 * make sure to clear it out afterwards 2007 */ 2008 2009 field_size = EC_GROUP_get_degree(srvr_group); 2010 if (field_size <= 0) 2011 { 2012 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2013 ERR_R_ECDH_LIB); 2014 goto err; 2015 } 2016 n=ECDH_compute_key(p, (field_size+7)/8, srvr_ecpoint, clnt_ecdh, NULL); 2017 if (n <= 0) 2018 { 2019 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2020 ERR_R_ECDH_LIB); 2021 goto err; 2022 } 2023 2024 /* generate master key from the result */ 2025 s->session->master_key_length = s->method->ssl3_enc \ 2026 -> generate_master_secret(s, 2027 s->session->master_key, 2028 p, n); 2029 2030 memset(p, 0, n); /* clean up */ 2031 2032 if (ecdh_clnt_cert) 2033 { 2034 /* Send empty client key exch message */ 2035 n = 0; 2036 } 2037 else 2038 { 2039 /* First check the size of encoding and 2040 * allocate memory accordingly. 2041 */ 2042 encoded_pt_len = 2043 EC_POINT_point2oct(srvr_group, 2044 EC_KEY_get0_public_key(clnt_ecdh), 2045 POINT_CONVERSION_UNCOMPRESSED, 2046 NULL, 0, NULL); 2047 2048 encodedPoint = (unsigned char *) 2049 OPENSSL_malloc(encoded_pt_len * 2050 sizeof(unsigned char)); 2051 bn_ctx = BN_CTX_new(); 2052 if ((encodedPoint == NULL) || 2053 (bn_ctx == NULL)) 2054 { 2055 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE,ERR_R_MALLOC_FAILURE); 2056 goto err; 2057 } 2058 2059 /* Encode the public key */ 2060 n = EC_POINT_point2oct(srvr_group, 2061 EC_KEY_get0_public_key(clnt_ecdh), 2062 POINT_CONVERSION_UNCOMPRESSED, 2063 encodedPoint, encoded_pt_len, bn_ctx); 2064 2065 *p = n; /* length of encoded point */ 2066 /* Encoded point will be copied here */ 2067 p += 1; 2068 /* copy the point */ 2069 memcpy((unsigned char *)p, encodedPoint, n); 2070 /* increment n to account for length field */ 2071 n += 1; 2072 } 2073 2074 /* Free allocated memory */ 2075 BN_CTX_free(bn_ctx); 2076 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2077 if (clnt_ecdh != NULL) 2078 EC_KEY_free(clnt_ecdh); 2079 EVP_PKEY_free(srvr_pub_pkey); 2080 } 2081#endif /* !OPENSSL_NO_ECDH */ 2082 else 2083 { 2084 ssl3_send_alert(s, SSL3_AL_FATAL, 2085 SSL_AD_HANDSHAKE_FAILURE); 2086 SSLerr(SSL_F_SSL3_SEND_CLIENT_KEY_EXCHANGE, 2087 ERR_R_INTERNAL_ERROR); 2088 goto err; 2089 } 2090 2091 *(d++)=SSL3_MT_CLIENT_KEY_EXCHANGE; 2092 l2n3(n,d); 2093 2094 s->state=SSL3_ST_CW_KEY_EXCH_B; 2095 /* number of bytes to write */ 2096 s->init_num=n+4; 2097 s->init_off=0; 2098 } 2099 2100 /* SSL3_ST_CW_KEY_EXCH_B */ 2101 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2102err: 2103#ifndef OPENSSL_NO_ECDH 2104 BN_CTX_free(bn_ctx); 2105 if (encodedPoint != NULL) OPENSSL_free(encodedPoint); 2106 if (clnt_ecdh != NULL) 2107 EC_KEY_free(clnt_ecdh); 2108 EVP_PKEY_free(srvr_pub_pkey); 2109#endif 2110 return(-1); 2111 } 2112 2113int ssl3_send_client_verify(SSL *s) 2114 { 2115 unsigned char *p,*d; 2116 unsigned char data[MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH]; 2117 EVP_PKEY *pkey; 2118#ifndef OPENSSL_NO_RSA 2119 unsigned u=0; 2120#endif 2121 unsigned long n; 2122#if !defined(OPENSSL_NO_DSA) || !defined(OPENSSL_NO_ECDSA) 2123 int j; 2124#endif 2125 2126 if (s->state == SSL3_ST_CW_CERT_VRFY_A) 2127 { 2128 d=(unsigned char *)s->init_buf->data; 2129 p= &(d[4]); 2130 pkey=s->cert->key->privatekey; 2131 2132 s->method->ssl3_enc->cert_verify_mac(s,&(s->s3->finish_dgst2), 2133 &(data[MD5_DIGEST_LENGTH])); 2134 2135#ifndef OPENSSL_NO_RSA 2136 if (pkey->type == EVP_PKEY_RSA) 2137 { 2138 s->method->ssl3_enc->cert_verify_mac(s, 2139 &(s->s3->finish_dgst1),&(data[0])); 2140 if (RSA_sign(NID_md5_sha1, data, 2141 MD5_DIGEST_LENGTH+SHA_DIGEST_LENGTH, 2142 &(p[2]), &u, pkey->pkey.rsa) <= 0 ) 2143 { 2144 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_RSA_LIB); 2145 goto err; 2146 } 2147 s2n(u,p); 2148 n=u+2; 2149 } 2150 else 2151#endif 2152#ifndef OPENSSL_NO_DSA 2153 if (pkey->type == EVP_PKEY_DSA) 2154 { 2155 if (!DSA_sign(pkey->save_type, 2156 &(data[MD5_DIGEST_LENGTH]), 2157 SHA_DIGEST_LENGTH,&(p[2]), 2158 (unsigned int *)&j,pkey->pkey.dsa)) 2159 { 2160 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_DSA_LIB); 2161 goto err; 2162 } 2163 s2n(j,p); 2164 n=j+2; 2165 } 2166 else 2167#endif 2168#ifndef OPENSSL_NO_ECDSA 2169 if (pkey->type == EVP_PKEY_EC) 2170 { 2171 if (!ECDSA_sign(pkey->save_type, 2172 &(data[MD5_DIGEST_LENGTH]), 2173 SHA_DIGEST_LENGTH,&(p[2]), 2174 (unsigned int *)&j,pkey->pkey.ec)) 2175 { 2176 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY, 2177 ERR_R_ECDSA_LIB); 2178 goto err; 2179 } 2180 s2n(j,p); 2181 n=j+2; 2182 } 2183 else 2184#endif 2185 { 2186 SSLerr(SSL_F_SSL3_SEND_CLIENT_VERIFY,ERR_R_INTERNAL_ERROR); 2187 goto err; 2188 } 2189 *(d++)=SSL3_MT_CERTIFICATE_VERIFY; 2190 l2n3(n,d); 2191 2192 s->state=SSL3_ST_CW_CERT_VRFY_B; 2193 s->init_num=(int)n+4; 2194 s->init_off=0; 2195 } 2196 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2197err: 2198 return(-1); 2199 } 2200 2201int ssl3_send_client_certificate(SSL *s) 2202 { 2203 X509 *x509=NULL; 2204 EVP_PKEY *pkey=NULL; 2205 int i; 2206 unsigned long l; 2207 2208 if (s->state == SSL3_ST_CW_CERT_A) 2209 { 2210 if ((s->cert == NULL) || 2211 (s->cert->key->x509 == NULL) || 2212 (s->cert->key->privatekey == NULL)) 2213 s->state=SSL3_ST_CW_CERT_B; 2214 else 2215 s->state=SSL3_ST_CW_CERT_C; 2216 } 2217 2218 /* We need to get a client cert */ 2219 if (s->state == SSL3_ST_CW_CERT_B) 2220 { 2221 /* If we get an error, we need to 2222 * ssl->rwstate=SSL_X509_LOOKUP; return(-1); 2223 * We then get retied later */ 2224 i=0; 2225 if (s->ctx->client_cert_cb != NULL) 2226 i=s->ctx->client_cert_cb(s,&(x509),&(pkey)); 2227 if (i < 0) 2228 { 2229 s->rwstate=SSL_X509_LOOKUP; 2230 return(-1); 2231 } 2232 s->rwstate=SSL_NOTHING; 2233 if ((i == 1) && (pkey != NULL) && (x509 != NULL)) 2234 { 2235 s->state=SSL3_ST_CW_CERT_B; 2236 if ( !SSL_use_certificate(s,x509) || 2237 !SSL_use_PrivateKey(s,pkey)) 2238 i=0; 2239 } 2240 else if (i == 1) 2241 { 2242 i=0; 2243 SSLerr(SSL_F_SSL3_SEND_CLIENT_CERTIFICATE,SSL_R_BAD_DATA_RETURNED_BY_CALLBACK); 2244 } 2245 2246 if (x509 != NULL) X509_free(x509); 2247 if (pkey != NULL) EVP_PKEY_free(pkey); 2248 if (i == 0) 2249 { 2250 if (s->version == SSL3_VERSION) 2251 { 2252 s->s3->tmp.cert_req=0; 2253 ssl3_send_alert(s,SSL3_AL_WARNING,SSL_AD_NO_CERTIFICATE); 2254 return(1); 2255 } 2256 else 2257 { 2258 s->s3->tmp.cert_req=2; 2259 } 2260 } 2261 2262 /* Ok, we have a cert */ 2263 s->state=SSL3_ST_CW_CERT_C; 2264 } 2265 2266 if (s->state == SSL3_ST_CW_CERT_C) 2267 { 2268 s->state=SSL3_ST_CW_CERT_D; 2269 l=ssl3_output_cert_chain(s, 2270 (s->s3->tmp.cert_req == 2)?NULL:s->cert->key->x509); 2271 s->init_num=(int)l; 2272 s->init_off=0; 2273 } 2274 /* SSL3_ST_CW_CERT_D */ 2275 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 2276 } 2277 2278#define has_bits(i,m) (((i)&(m)) == (m)) 2279 2280int ssl3_check_cert_and_algorithm(SSL *s) 2281 { 2282 int i,idx; 2283 long algs; 2284 EVP_PKEY *pkey=NULL; 2285 SESS_CERT *sc; 2286#ifndef OPENSSL_NO_RSA 2287 RSA *rsa; 2288#endif 2289#ifndef OPENSSL_NO_DH 2290 DH *dh; 2291#endif 2292 2293 sc=s->session->sess_cert; 2294 2295 if (sc == NULL) 2296 { 2297 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,ERR_R_INTERNAL_ERROR); 2298 goto err; 2299 } 2300 2301 algs=s->s3->tmp.new_cipher->algorithms; 2302 2303 /* we don't have a certificate */ 2304 if (algs & (SSL_aDH|SSL_aNULL|SSL_aKRB5)) 2305 return(1); 2306 2307#ifndef OPENSSL_NO_RSA 2308 rsa=s->session->sess_cert->peer_rsa_tmp; 2309#endif 2310#ifndef OPENSSL_NO_DH 2311 dh=s->session->sess_cert->peer_dh_tmp; 2312#endif 2313 2314 /* This is the passed certificate */ 2315 2316 idx=sc->peer_cert_type; 2317#ifndef OPENSSL_NO_ECDH 2318 if (idx == SSL_PKEY_ECC) 2319 { 2320 if (check_srvr_ecc_cert_and_alg(sc->peer_pkeys[idx].x509, 2321 s->s3->tmp.new_cipher) == 0) 2322 { /* check failed */ 2323 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_BAD_ECC_CERT); 2324 goto f_err; 2325 } 2326 else 2327 { 2328 return 1; 2329 } 2330 } 2331#endif 2332 pkey=X509_get_pubkey(sc->peer_pkeys[idx].x509); 2333 i=X509_certificate_type(sc->peer_pkeys[idx].x509,pkey); 2334 EVP_PKEY_free(pkey); 2335 2336 2337 /* Check that we have a certificate if we require one */ 2338 if ((algs & SSL_aRSA) && !has_bits(i,EVP_PK_RSA|EVP_PKT_SIGN)) 2339 { 2340 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_SIGNING_CERT); 2341 goto f_err; 2342 } 2343#ifndef OPENSSL_NO_DSA 2344 else if ((algs & SSL_aDSS) && !has_bits(i,EVP_PK_DSA|EVP_PKT_SIGN)) 2345 { 2346 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DSA_SIGNING_CERT); 2347 goto f_err; 2348 } 2349#endif 2350#ifndef OPENSSL_NO_RSA 2351 if ((algs & SSL_kRSA) && 2352 !(has_bits(i,EVP_PK_RSA|EVP_PKT_ENC) || (rsa != NULL))) 2353 { 2354 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_RSA_ENCRYPTING_CERT); 2355 goto f_err; 2356 } 2357#endif 2358#ifndef OPENSSL_NO_DH 2359 if ((algs & SSL_kEDH) && 2360 !(has_bits(i,EVP_PK_DH|EVP_PKT_EXCH) || (dh != NULL))) 2361 { 2362 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_KEY); 2363 goto f_err; 2364 } 2365 else if ((algs & SSL_kDHr) && !has_bits(i,EVP_PK_DH|EVP_PKS_RSA)) 2366 { 2367 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_RSA_CERT); 2368 goto f_err; 2369 } 2370#ifndef OPENSSL_NO_DSA 2371 else if ((algs & SSL_kDHd) && !has_bits(i,EVP_PK_DH|EVP_PKS_DSA)) 2372 { 2373 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_DH_DSA_CERT); 2374 goto f_err; 2375 } 2376#endif 2377#endif 2378 2379 if (SSL_C_IS_EXPORT(s->s3->tmp.new_cipher) && !has_bits(i,EVP_PKT_EXP)) 2380 { 2381#ifndef OPENSSL_NO_RSA 2382 if (algs & SSL_kRSA) 2383 { 2384 if (rsa == NULL 2385 || RSA_size(rsa)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 2386 { 2387 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_RSA_KEY); 2388 goto f_err; 2389 } 2390 } 2391 else 2392#endif 2393#ifndef OPENSSL_NO_DH 2394 if (algs & (SSL_kEDH|SSL_kDHr|SSL_kDHd)) 2395 { 2396 if (dh == NULL 2397 || DH_size(dh)*8 > SSL_C_EXPORT_PKEYLENGTH(s->s3->tmp.new_cipher)) 2398 { 2399 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_MISSING_EXPORT_TMP_DH_KEY); 2400 goto f_err; 2401 } 2402 } 2403 else 2404#endif 2405 { 2406 SSLerr(SSL_F_SSL3_CHECK_CERT_AND_ALGORITHM,SSL_R_UNKNOWN_KEY_EXCHANGE_TYPE); 2407 goto f_err; 2408 } 2409 } 2410 return(1); 2411f_err: 2412 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE); 2413err: 2414 return(0); 2415 } 2416 2417 2418#ifndef OPENSSL_NO_ECDH 2419/* This is the complement of nid2curve_id in s3_srvr.c. */ 2420static int curve_id2nid(int curve_id) 2421{ 2422 /* ECC curves from draft-ietf-tls-ecc-01.txt (Mar 15, 2001) 2423 * (no changes in draft-ietf-tls-ecc-03.txt [June 2003]) */ 2424 static int nid_list[26] = 2425 { 2426 0, 2427 NID_sect163k1, /* sect163k1 (1) */ 2428 NID_sect163r1, /* sect163r1 (2) */ 2429 NID_sect163r2, /* sect163r2 (3) */ 2430 NID_sect193r1, /* sect193r1 (4) */ 2431 NID_sect193r2, /* sect193r2 (5) */ 2432 NID_sect233k1, /* sect233k1 (6) */ 2433 NID_sect233r1, /* sect233r1 (7) */ 2434 NID_sect239k1, /* sect239k1 (8) */ 2435 NID_sect283k1, /* sect283k1 (9) */ 2436 NID_sect283r1, /* sect283r1 (10) */ 2437 NID_sect409k1, /* sect409k1 (11) */ 2438 NID_sect409r1, /* sect409r1 (12) */ 2439 NID_sect571k1, /* sect571k1 (13) */ 2440 NID_sect571r1, /* sect571r1 (14) */ 2441 NID_secp160k1, /* secp160k1 (15) */ 2442 NID_secp160r1, /* secp160r1 (16) */ 2443 NID_secp160r2, /* secp160r2 (17) */ 2444 NID_secp192k1, /* secp192k1 (18) */ 2445 NID_X9_62_prime192v1, /* secp192r1 (19) */ 2446 NID_secp224k1, /* secp224k1 (20) */ 2447 NID_secp224r1, /* secp224r1 (21) */ 2448 NID_secp256k1, /* secp256k1 (22) */ 2449 NID_X9_62_prime256v1, /* secp256r1 (23) */ 2450 NID_secp384r1, /* secp384r1 (24) */ 2451 NID_secp521r1 /* secp521r1 (25) */ 2452 }; 2453 2454 if ((curve_id < 1) || (curve_id > 25)) return 0; 2455 2456 return nid_list[curve_id]; 2457} 2458#endif 2459