1/* ssl/s3_both.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) 1998-2002 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 * ECC cipher suite support in OpenSSL originally developed by 114 * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. 115 */ 116 117#include <limits.h> 118#include <string.h> 119#include <stdio.h> 120#include "ssl_locl.h" 121#include <openssl/buffer.h> 122#include <openssl/rand.h> 123#include <openssl/objects.h> 124#include <openssl/evp.h> 125#include <openssl/x509.h> 126 127/* send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or SSL3_RT_CHANGE_CIPHER_SPEC) */ 128int ssl3_do_write(SSL *s, int type) 129 { 130 int ret; 131 132 ret=ssl3_write_bytes(s,type,&s->init_buf->data[s->init_off], 133 s->init_num); 134 if (ret < 0) return(-1); 135 if (type == SSL3_RT_HANDSHAKE) 136 /* should not be done for 'Hello Request's, but in that case 137 * we'll ignore the result anyway */ 138 ssl3_finish_mac(s,(unsigned char *)&s->init_buf->data[s->init_off],ret); 139 140 if (ret == s->init_num) 141 { 142 if (s->msg_callback) 143 s->msg_callback(1, s->version, type, s->init_buf->data, (size_t)(s->init_off + s->init_num), s, s->msg_callback_arg); 144 return(1); 145 } 146 s->init_off+=ret; 147 s->init_num-=ret; 148 return(0); 149 } 150 151int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen) 152 { 153 unsigned char *p,*d; 154 int i; 155 unsigned long l; 156 157 if (s->state == a) 158 { 159 d=(unsigned char *)s->init_buf->data; 160 p= &(d[4]); 161 162 i=s->method->ssl3_enc->final_finish_mac(s, 163 sender,slen,s->s3->tmp.finish_md); 164 s->s3->tmp.finish_md_len = i; 165 memcpy(p, s->s3->tmp.finish_md, i); 166 p+=i; 167 l=i; 168 169 /* Copy the finished so we can use it for 170 renegotiation checks */ 171 if(s->type == SSL_ST_CONNECT) 172 { 173 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 174 memcpy(s->s3->previous_client_finished, 175 s->s3->tmp.finish_md, i); 176 s->s3->previous_client_finished_len=i; 177 } 178 else 179 { 180 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 181 memcpy(s->s3->previous_server_finished, 182 s->s3->tmp.finish_md, i); 183 s->s3->previous_server_finished_len=i; 184 } 185 186#ifdef OPENSSL_SYS_WIN16 187 /* MSVC 1.5 does not clear the top bytes of the word unless 188 * I do this. 189 */ 190 l&=0xffff; 191#endif 192 193 *(d++)=SSL3_MT_FINISHED; 194 l2n3(l,d); 195 s->init_num=(int)l+4; 196 s->init_off=0; 197 198 s->state=b; 199 } 200 201 /* SSL3_ST_SEND_xxxxxx_HELLO_B */ 202 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 203 } 204 205int ssl3_get_finished(SSL *s, int a, int b) 206 { 207 int al,i,ok; 208 long n; 209 unsigned char *p; 210 211 /* the mac has already been generated when we received the 212 * change cipher spec message and is in s->s3->tmp.peer_finish_md 213 */ 214 215 n=s->method->ssl_get_message(s, 216 a, 217 b, 218 SSL3_MT_FINISHED, 219 64, /* should actually be 36+4 :-) */ 220 &ok); 221 222 if (!ok) return((int)n); 223 224 /* If this occurs, we have missed a message */ 225 if (!s->s3->change_cipher_spec) 226 { 227 al=SSL_AD_UNEXPECTED_MESSAGE; 228 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS); 229 goto f_err; 230 } 231 s->s3->change_cipher_spec=0; 232 233 p = (unsigned char *)s->init_msg; 234 i = s->s3->tmp.peer_finish_md_len; 235 236 if (i != n) 237 { 238 al=SSL_AD_DECODE_ERROR; 239 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH); 240 goto f_err; 241 } 242 243 if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0) 244 { 245 al=SSL_AD_DECRYPT_ERROR; 246 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED); 247 goto f_err; 248 } 249 250 /* Copy the finished so we can use it for 251 renegotiation checks */ 252 if(s->type == SSL_ST_ACCEPT) 253 { 254 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 255 memcpy(s->s3->previous_client_finished, 256 s->s3->tmp.peer_finish_md, i); 257 s->s3->previous_client_finished_len=i; 258 } 259 else 260 { 261 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 262 memcpy(s->s3->previous_server_finished, 263 s->s3->tmp.peer_finish_md, i); 264 s->s3->previous_server_finished_len=i; 265 } 266 267 return(1); 268f_err: 269 ssl3_send_alert(s,SSL3_AL_FATAL,al); 270 return(0); 271 } 272 273/* for these 2 messages, we need to 274 * ssl->enc_read_ctx re-init 275 * ssl->s3->read_sequence zero 276 * ssl->s3->read_mac_secret re-init 277 * ssl->session->read_sym_enc assign 278 * ssl->session->read_compression assign 279 * ssl->session->read_hash assign 280 */ 281int ssl3_send_change_cipher_spec(SSL *s, int a, int b) 282 { 283 unsigned char *p; 284 285 if (s->state == a) 286 { 287 p=(unsigned char *)s->init_buf->data; 288 *p=SSL3_MT_CCS; 289 s->init_num=1; 290 s->init_off=0; 291 292 s->state=b; 293 } 294 295 /* SSL3_ST_CW_CHANGE_B */ 296 return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC)); 297 } 298 299static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x) 300 { 301 int n; 302 unsigned char *p; 303 304 n=i2d_X509(x,NULL); 305 if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3))) 306 { 307 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF,ERR_R_BUF_LIB); 308 return(-1); 309 } 310 p=(unsigned char *)&(buf->data[*l]); 311 l2n3(n,p); 312 i2d_X509(x,&p); 313 *l+=n+3; 314 315 return(0); 316 } 317 318unsigned long ssl3_output_cert_chain(SSL *s, X509 *x) 319 { 320 unsigned char *p; 321 int i; 322 unsigned long l=7; 323 BUF_MEM *buf; 324 int no_chain; 325 326 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs) 327 no_chain = 1; 328 else 329 no_chain = 0; 330 331 /* TLSv1 sends a chain with nothing in it, instead of an alert */ 332 buf=s->init_buf; 333 if (!BUF_MEM_grow_clean(buf,10)) 334 { 335 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB); 336 return(0); 337 } 338 if (x != NULL) 339 { 340 if (no_chain) 341 { 342 if (ssl3_add_cert_to_buf(buf, &l, x)) 343 return(0); 344 } 345 else 346 { 347 X509_STORE_CTX xs_ctx; 348 349 if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL)) 350 { 351 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB); 352 return(0); 353 } 354 X509_verify_cert(&xs_ctx); 355 /* Don't leave errors in the queue */ 356 ERR_clear_error(); 357 for (i=0; i < sk_X509_num(xs_ctx.chain); i++) 358 { 359 x = sk_X509_value(xs_ctx.chain, i); 360 361 if (ssl3_add_cert_to_buf(buf, &l, x)) 362 { 363 X509_STORE_CTX_cleanup(&xs_ctx); 364 return 0; 365 } 366 } 367 X509_STORE_CTX_cleanup(&xs_ctx); 368 } 369 } 370 /* Thawte special :-) */ 371 for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++) 372 { 373 x=sk_X509_value(s->ctx->extra_certs,i); 374 if (ssl3_add_cert_to_buf(buf, &l, x)) 375 return(0); 376 } 377 378 l-=7; 379 p=(unsigned char *)&(buf->data[4]); 380 l2n3(l,p); 381 l+=3; 382 p=(unsigned char *)&(buf->data[0]); 383 *(p++)=SSL3_MT_CERTIFICATE; 384 l2n3(l,p); 385 l+=4; 386 return(l); 387 } 388 389/* Obtain handshake message of message type 'mt' (any if mt == -1), 390 * maximum acceptable body length 'max'. 391 * The first four bytes (msg_type and length) are read in state 'st1', 392 * the body is read in state 'stn'. 393 */ 394long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok) 395 { 396 unsigned char *p; 397 unsigned long l; 398 long n; 399 int i,al; 400 401 if (s->s3->tmp.reuse_message) 402 { 403 s->s3->tmp.reuse_message=0; 404 if ((mt >= 0) && (s->s3->tmp.message_type != mt)) 405 { 406 al=SSL_AD_UNEXPECTED_MESSAGE; 407 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE); 408 goto f_err; 409 } 410 *ok=1; 411 s->state = stn; 412 s->init_msg = s->init_buf->data + 4; 413 s->init_num = (int)s->s3->tmp.message_size; 414 return s->init_num; 415 } 416 417 p=(unsigned char *)s->init_buf->data; 418 419 if (s->state == st1) /* s->init_num < 4 */ 420 { 421 int skip_message; 422 423 do 424 { 425 while (s->init_num < 4) 426 { 427 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE, 428 &p[s->init_num],4 - s->init_num, 0); 429 if (i <= 0) 430 { 431 s->rwstate=SSL_READING; 432 *ok = 0; 433 return i; 434 } 435 s->init_num+=i; 436 } 437 438 skip_message = 0; 439 if (!s->server) 440 if (p[0] == SSL3_MT_HELLO_REQUEST) 441 /* The server may always send 'Hello Request' messages -- 442 * we are doing a handshake anyway now, so ignore them 443 * if their format is correct. Does not count for 444 * 'Finished' MAC. */ 445 if (p[1] == 0 && p[2] == 0 &&p[3] == 0) 446 { 447 s->init_num = 0; 448 skip_message = 1; 449 450 if (s->msg_callback) 451 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg); 452 } 453 } 454 while (skip_message); 455 456 /* s->init_num == 4 */ 457 458 if ((mt >= 0) && (*p != mt)) 459 { 460 al=SSL_AD_UNEXPECTED_MESSAGE; 461 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE); 462 goto f_err; 463 } 464 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) && 465 (st1 == SSL3_ST_SR_CERT_A) && 466 (stn == SSL3_ST_SR_CERT_B)) 467 { 468 /* At this point we have got an MS SGC second client 469 * hello (maybe we should always allow the client to 470 * start a new handshake?). We need to restart the mac. 471 * Don't increment {num,total}_renegotiations because 472 * we have not completed the handshake. */ 473 ssl3_init_finished_mac(s); 474 } 475 476 s->s3->tmp.message_type= *(p++); 477 478 n2l3(p,l); 479 if (l > (unsigned long)max) 480 { 481 al=SSL_AD_ILLEGAL_PARAMETER; 482 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE); 483 goto f_err; 484 } 485 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */ 486 { 487 al=SSL_AD_ILLEGAL_PARAMETER; 488 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE); 489 goto f_err; 490 } 491 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4)) 492 { 493 SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB); 494 goto err; 495 } 496 s->s3->tmp.message_size=l; 497 s->state=stn; 498 499 s->init_msg = s->init_buf->data + 4; 500 s->init_num = 0; 501 } 502 503 /* next state (stn) */ 504 p = s->init_msg; 505 n = s->s3->tmp.message_size - s->init_num; 506 while (n > 0) 507 { 508 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0); 509 if (i <= 0) 510 { 511 s->rwstate=SSL_READING; 512 *ok = 0; 513 return i; 514 } 515 s->init_num += i; 516 n -= i; 517 } 518 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4); 519 if (s->msg_callback) 520 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg); 521 *ok=1; 522 return s->init_num; 523f_err: 524 ssl3_send_alert(s,SSL3_AL_FATAL,al); 525err: 526 *ok=0; 527 return(-1); 528 } 529 530int ssl_cert_type(X509 *x, EVP_PKEY *pkey) 531 { 532 EVP_PKEY *pk; 533 int ret= -1,i; 534 535 if (pkey == NULL) 536 pk=X509_get_pubkey(x); 537 else 538 pk=pkey; 539 if (pk == NULL) goto err; 540 541 i=pk->type; 542 if (i == EVP_PKEY_RSA) 543 { 544 ret=SSL_PKEY_RSA_ENC; 545 } 546 else if (i == EVP_PKEY_DSA) 547 { 548 ret=SSL_PKEY_DSA_SIGN; 549 } 550#ifndef OPENSSL_NO_EC 551 else if (i == EVP_PKEY_EC) 552 { 553 ret = SSL_PKEY_ECC; 554 } 555#endif 556 else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc) 557 { 558 ret = SSL_PKEY_GOST94; 559 } 560 else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc) 561 { 562 ret = SSL_PKEY_GOST01; 563 } 564err: 565 if(!pkey) EVP_PKEY_free(pk); 566 return(ret); 567 } 568 569int ssl_verify_alarm_type(long type) 570 { 571 int al; 572 573 switch(type) 574 { 575 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: 576 case X509_V_ERR_UNABLE_TO_GET_CRL: 577 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: 578 al=SSL_AD_UNKNOWN_CA; 579 break; 580 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: 581 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: 582 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: 583 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: 584 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: 585 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: 586 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: 587 case X509_V_ERR_CERT_NOT_YET_VALID: 588 case X509_V_ERR_CRL_NOT_YET_VALID: 589 case X509_V_ERR_CERT_UNTRUSTED: 590 case X509_V_ERR_CERT_REJECTED: 591 al=SSL_AD_BAD_CERTIFICATE; 592 break; 593 case X509_V_ERR_CERT_SIGNATURE_FAILURE: 594 case X509_V_ERR_CRL_SIGNATURE_FAILURE: 595 al=SSL_AD_DECRYPT_ERROR; 596 break; 597 case X509_V_ERR_CERT_HAS_EXPIRED: 598 case X509_V_ERR_CRL_HAS_EXPIRED: 599 al=SSL_AD_CERTIFICATE_EXPIRED; 600 break; 601 case X509_V_ERR_CERT_REVOKED: 602 al=SSL_AD_CERTIFICATE_REVOKED; 603 break; 604 case X509_V_ERR_OUT_OF_MEM: 605 al=SSL_AD_INTERNAL_ERROR; 606 break; 607 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: 608 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: 609 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: 610 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: 611 case X509_V_ERR_CERT_CHAIN_TOO_LONG: 612 case X509_V_ERR_PATH_LENGTH_EXCEEDED: 613 case X509_V_ERR_INVALID_CA: 614 al=SSL_AD_UNKNOWN_CA; 615 break; 616 case X509_V_ERR_APPLICATION_VERIFICATION: 617 al=SSL_AD_HANDSHAKE_FAILURE; 618 break; 619 case X509_V_ERR_INVALID_PURPOSE: 620 al=SSL_AD_UNSUPPORTED_CERTIFICATE; 621 break; 622 default: 623 al=SSL_AD_CERTIFICATE_UNKNOWN; 624 break; 625 } 626 return(al); 627 } 628 629#ifndef OPENSSL_NO_BUF_FREELISTS 630/* On some platforms, malloc() performance is bad enough that you can't just 631 * free() and malloc() buffers all the time, so we need to use freelists from 632 * unused buffers. Currently, each freelist holds memory chunks of only a 633 * given size (list->chunklen); other sized chunks are freed and malloced. 634 * This doesn't help much if you're using many different SSL option settings 635 * with a given context. (The options affecting buffer size are 636 * max_send_fragment, read buffer vs write buffer, 637 * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and 638 * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.) Using a separate freelist for every 639 * possible size is not an option, since max_send_fragment can take on many 640 * different values. 641 * 642 * If you are on a platform with a slow malloc(), and you're using SSL 643 * connections with many different settings for these options, and you need to 644 * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options: 645 * - Link against a faster malloc implementation. 646 * - Use a separate SSL_CTX for each option set. 647 * - Improve this code. 648 */ 649static void * 650freelist_extract(SSL_CTX *ctx, int for_read, int sz) 651 { 652 SSL3_BUF_FREELIST *list; 653 SSL3_BUF_FREELIST_ENTRY *ent = NULL; 654 void *result = NULL; 655 656 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 657 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist; 658 if (list != NULL && sz == (int)list->chunklen) 659 ent = list->head; 660 if (ent != NULL) 661 { 662 list->head = ent->next; 663 result = ent; 664 if (--list->len == 0) 665 list->chunklen = 0; 666 } 667 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 668 if (!result) 669 result = OPENSSL_malloc(sz); 670 return result; 671} 672 673static void 674freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem) 675 { 676 SSL3_BUF_FREELIST *list; 677 SSL3_BUF_FREELIST_ENTRY *ent; 678 679 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 680 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist; 681 if (list != NULL && 682 (sz == list->chunklen || list->chunklen == 0) && 683 list->len < ctx->freelist_max_len && 684 sz >= sizeof(*ent)) 685 { 686 list->chunklen = sz; 687 ent = mem; 688 ent->next = list->head; 689 list->head = ent; 690 ++list->len; 691 mem = NULL; 692 } 693 694 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 695 if (mem) 696 OPENSSL_free(mem); 697 } 698#else 699#define freelist_extract(c,fr,sz) OPENSSL_malloc(sz) 700#define freelist_insert(c,fr,sz,m) OPENSSL_free(m) 701#endif 702 703int ssl3_setup_read_buffer(SSL *s) 704 { 705 unsigned char *p; 706 size_t len,align=0,headerlen; 707 708 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 709 headerlen = DTLS1_RT_HEADER_LENGTH; 710 else 711 headerlen = SSL3_RT_HEADER_LENGTH; 712 713#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 714 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1); 715#endif 716 717 if (s->s3->rbuf.buf == NULL) 718 { 719 len = SSL3_RT_MAX_PLAIN_LENGTH 720 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD 721 + headerlen + align; 722 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) 723 { 724 s->s3->init_extra = 1; 725 len += SSL3_RT_MAX_EXTRA; 726 } 727#ifndef OPENSSL_NO_COMP 728 if (!(s->options & SSL_OP_NO_COMPRESSION)) 729 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD; 730#endif 731 if ((p=freelist_extract(s->ctx, 1, len)) == NULL) 732 goto err; 733 s->s3->rbuf.buf = p; 734 s->s3->rbuf.len = len; 735 } 736 737 s->packet= &(s->s3->rbuf.buf[0]); 738 return 1; 739 740err: 741 SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER,ERR_R_MALLOC_FAILURE); 742 return 0; 743 } 744 745int ssl3_setup_write_buffer(SSL *s) 746 { 747 unsigned char *p; 748 size_t len,align=0,headerlen; 749 750 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 751 headerlen = DTLS1_RT_HEADER_LENGTH + 1; 752 else 753 headerlen = SSL3_RT_HEADER_LENGTH; 754 755#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 756 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1); 757#endif 758 759 if (s->s3->wbuf.buf == NULL) 760 { 761 len = s->max_send_fragment 762 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD 763 + headerlen + align; 764#ifndef OPENSSL_NO_COMP 765 if (!(s->options & SSL_OP_NO_COMPRESSION)) 766 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD; 767#endif 768 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) 769 len += headerlen + align 770 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD; 771 772 if ((p=freelist_extract(s->ctx, 0, len)) == NULL) 773 goto err; 774 s->s3->wbuf.buf = p; 775 s->s3->wbuf.len = len; 776 } 777 778 return 1; 779 780err: 781 SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER,ERR_R_MALLOC_FAILURE); 782 return 0; 783 } 784 785 786int ssl3_setup_buffers(SSL *s) 787 { 788 if (!ssl3_setup_read_buffer(s)) 789 return 0; 790 if (!ssl3_setup_write_buffer(s)) 791 return 0; 792 return 1; 793 } 794 795int ssl3_release_write_buffer(SSL *s) 796 { 797 if (s->s3->wbuf.buf != NULL) 798 { 799 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf); 800 s->s3->wbuf.buf = NULL; 801 } 802 return 1; 803 } 804 805int ssl3_release_read_buffer(SSL *s) 806 { 807 if (s->s3->rbuf.buf != NULL) 808 { 809 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf); 810 s->s3->rbuf.buf = NULL; 811 } 812 return 1; 813 } 814 815