s3_both.c revision 260404
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 } 204 205#ifndef OPENSSL_NO_NEXTPROTONEG 206/* ssl3_take_mac calculates the Finished MAC for the handshakes messages seen to far. */ 207static void ssl3_take_mac(SSL *s) 208 { 209 const char *sender; 210 int slen; 211 /* If no new cipher setup return immediately: other functions will 212 * set the appropriate error. 213 */ 214 if (s->s3->tmp.new_cipher == NULL) 215 return; 216 if (s->state & SSL_ST_CONNECT) 217 { 218 sender=s->method->ssl3_enc->server_finished_label; 219 slen=s->method->ssl3_enc->server_finished_label_len; 220 } 221 else 222 { 223 sender=s->method->ssl3_enc->client_finished_label; 224 slen=s->method->ssl3_enc->client_finished_label_len; 225 } 226 227 s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s, 228 sender,slen,s->s3->tmp.peer_finish_md); 229 } 230#endif 231 232int ssl3_get_finished(SSL *s, int a, int b) 233 { 234 int al,i,ok; 235 long n; 236 unsigned char *p; 237 238#ifdef OPENSSL_NO_NEXTPROTONEG 239 /* the mac has already been generated when we received the 240 * change cipher spec message and is in s->s3->tmp.peer_finish_md. 241 */ 242#endif 243 244 n=s->method->ssl_get_message(s, 245 a, 246 b, 247 SSL3_MT_FINISHED, 248 64, /* should actually be 36+4 :-) */ 249 &ok); 250 251 if (!ok) return((int)n); 252 253 /* If this occurs, we have missed a message */ 254 if (!s->s3->change_cipher_spec) 255 { 256 al=SSL_AD_UNEXPECTED_MESSAGE; 257 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS); 258 goto f_err; 259 } 260 s->s3->change_cipher_spec=0; 261 262 p = (unsigned char *)s->init_msg; 263 i = s->s3->tmp.peer_finish_md_len; 264 265 if (i != n) 266 { 267 al=SSL_AD_DECODE_ERROR; 268 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH); 269 goto f_err; 270 } 271 272 if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0) 273 { 274 al=SSL_AD_DECRYPT_ERROR; 275 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED); 276 goto f_err; 277 } 278 279 /* Copy the finished so we can use it for 280 renegotiation checks */ 281 if(s->type == SSL_ST_ACCEPT) 282 { 283 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 284 memcpy(s->s3->previous_client_finished, 285 s->s3->tmp.peer_finish_md, i); 286 s->s3->previous_client_finished_len=i; 287 } 288 else 289 { 290 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 291 memcpy(s->s3->previous_server_finished, 292 s->s3->tmp.peer_finish_md, i); 293 s->s3->previous_server_finished_len=i; 294 } 295 296 return(1); 297f_err: 298 ssl3_send_alert(s,SSL3_AL_FATAL,al); 299 return(0); 300 } 301 302/* for these 2 messages, we need to 303 * ssl->enc_read_ctx re-init 304 * ssl->s3->read_sequence zero 305 * ssl->s3->read_mac_secret re-init 306 * ssl->session->read_sym_enc assign 307 * ssl->session->read_compression assign 308 * ssl->session->read_hash assign 309 */ 310int ssl3_send_change_cipher_spec(SSL *s, int a, int b) 311 { 312 unsigned char *p; 313 314 if (s->state == a) 315 { 316 p=(unsigned char *)s->init_buf->data; 317 *p=SSL3_MT_CCS; 318 s->init_num=1; 319 s->init_off=0; 320 321 s->state=b; 322 } 323 324 /* SSL3_ST_CW_CHANGE_B */ 325 return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC)); 326 } 327 328static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x) 329 { 330 int n; 331 unsigned char *p; 332 333 n=i2d_X509(x,NULL); 334 if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3))) 335 { 336 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF,ERR_R_BUF_LIB); 337 return(-1); 338 } 339 p=(unsigned char *)&(buf->data[*l]); 340 l2n3(n,p); 341 i2d_X509(x,&p); 342 *l+=n+3; 343 344 return(0); 345 } 346 347unsigned long ssl3_output_cert_chain(SSL *s, X509 *x) 348 { 349 unsigned char *p; 350 int i; 351 unsigned long l=7; 352 BUF_MEM *buf; 353 int no_chain; 354 355 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs) 356 no_chain = 1; 357 else 358 no_chain = 0; 359 360 /* TLSv1 sends a chain with nothing in it, instead of an alert */ 361 buf=s->init_buf; 362 if (!BUF_MEM_grow_clean(buf,10)) 363 { 364 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB); 365 return(0); 366 } 367 if (x != NULL) 368 { 369 if (no_chain) 370 { 371 if (ssl3_add_cert_to_buf(buf, &l, x)) 372 return(0); 373 } 374 else 375 { 376 X509_STORE_CTX xs_ctx; 377 378 if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL)) 379 { 380 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB); 381 return(0); 382 } 383 X509_verify_cert(&xs_ctx); 384 /* Don't leave errors in the queue */ 385 ERR_clear_error(); 386 for (i=0; i < sk_X509_num(xs_ctx.chain); i++) 387 { 388 x = sk_X509_value(xs_ctx.chain, i); 389 390 if (ssl3_add_cert_to_buf(buf, &l, x)) 391 { 392 X509_STORE_CTX_cleanup(&xs_ctx); 393 return 0; 394 } 395 } 396 X509_STORE_CTX_cleanup(&xs_ctx); 397 } 398 } 399 /* Thawte special :-) */ 400 for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++) 401 { 402 x=sk_X509_value(s->ctx->extra_certs,i); 403 if (ssl3_add_cert_to_buf(buf, &l, x)) 404 return(0); 405 } 406 407 l-=7; 408 p=(unsigned char *)&(buf->data[4]); 409 l2n3(l,p); 410 l+=3; 411 p=(unsigned char *)&(buf->data[0]); 412 *(p++)=SSL3_MT_CERTIFICATE; 413 l2n3(l,p); 414 l+=4; 415 return(l); 416 } 417 418/* Obtain handshake message of message type 'mt' (any if mt == -1), 419 * maximum acceptable body length 'max'. 420 * The first four bytes (msg_type and length) are read in state 'st1', 421 * the body is read in state 'stn'. 422 */ 423long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok) 424 { 425 unsigned char *p; 426 unsigned long l; 427 long n; 428 int i,al; 429 430 if (s->s3->tmp.reuse_message) 431 { 432 s->s3->tmp.reuse_message=0; 433 if ((mt >= 0) && (s->s3->tmp.message_type != mt)) 434 { 435 al=SSL_AD_UNEXPECTED_MESSAGE; 436 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE); 437 goto f_err; 438 } 439 *ok=1; 440 s->init_msg = s->init_buf->data + 4; 441 s->init_num = (int)s->s3->tmp.message_size; 442 return s->init_num; 443 } 444 445 p=(unsigned char *)s->init_buf->data; 446 447 if (s->state == st1) /* s->init_num < 4 */ 448 { 449 int skip_message; 450 451 do 452 { 453 while (s->init_num < 4) 454 { 455 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE, 456 &p[s->init_num],4 - s->init_num, 0); 457 if (i <= 0) 458 { 459 s->rwstate=SSL_READING; 460 *ok = 0; 461 return i; 462 } 463 s->init_num+=i; 464 } 465 466 skip_message = 0; 467 if (!s->server) 468 if (p[0] == SSL3_MT_HELLO_REQUEST) 469 /* The server may always send 'Hello Request' messages -- 470 * we are doing a handshake anyway now, so ignore them 471 * if their format is correct. Does not count for 472 * 'Finished' MAC. */ 473 if (p[1] == 0 && p[2] == 0 &&p[3] == 0) 474 { 475 s->init_num = 0; 476 skip_message = 1; 477 478 if (s->msg_callback) 479 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg); 480 } 481 } 482 while (skip_message); 483 484 /* s->init_num == 4 */ 485 486 if ((mt >= 0) && (*p != mt)) 487 { 488 al=SSL_AD_UNEXPECTED_MESSAGE; 489 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE); 490 goto f_err; 491 } 492 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) && 493 (st1 == SSL3_ST_SR_CERT_A) && 494 (stn == SSL3_ST_SR_CERT_B)) 495 { 496 /* At this point we have got an MS SGC second client 497 * hello (maybe we should always allow the client to 498 * start a new handshake?). We need to restart the mac. 499 * Don't increment {num,total}_renegotiations because 500 * we have not completed the handshake. */ 501 ssl3_init_finished_mac(s); 502 } 503 504 s->s3->tmp.message_type= *(p++); 505 506 n2l3(p,l); 507 if (l > (unsigned long)max) 508 { 509 al=SSL_AD_ILLEGAL_PARAMETER; 510 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE); 511 goto f_err; 512 } 513 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */ 514 { 515 al=SSL_AD_ILLEGAL_PARAMETER; 516 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE); 517 goto f_err; 518 } 519 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4)) 520 { 521 SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB); 522 goto err; 523 } 524 s->s3->tmp.message_size=l; 525 s->state=stn; 526 527 s->init_msg = s->init_buf->data + 4; 528 s->init_num = 0; 529 } 530 531 /* next state (stn) */ 532 p = s->init_msg; 533 n = s->s3->tmp.message_size - s->init_num; 534 while (n > 0) 535 { 536 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0); 537 if (i <= 0) 538 { 539 s->rwstate=SSL_READING; 540 *ok = 0; 541 return i; 542 } 543 s->init_num += i; 544 n -= i; 545 } 546 547#ifndef OPENSSL_NO_NEXTPROTONEG 548 /* If receiving Finished, record MAC of prior handshake messages for 549 * Finished verification. */ 550 if (*s->init_buf->data == SSL3_MT_FINISHED) 551 ssl3_take_mac(s); 552#endif 553 554 /* Feed this message into MAC computation. */ 555 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4); 556 if (s->msg_callback) 557 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg); 558 *ok=1; 559 return s->init_num; 560f_err: 561 ssl3_send_alert(s,SSL3_AL_FATAL,al); 562err: 563 *ok=0; 564 return(-1); 565 } 566 567int ssl_cert_type(X509 *x, EVP_PKEY *pkey) 568 { 569 EVP_PKEY *pk; 570 int ret= -1,i; 571 572 if (pkey == NULL) 573 pk=X509_get_pubkey(x); 574 else 575 pk=pkey; 576 if (pk == NULL) goto err; 577 578 i=pk->type; 579 if (i == EVP_PKEY_RSA) 580 { 581 ret=SSL_PKEY_RSA_ENC; 582 } 583 else if (i == EVP_PKEY_DSA) 584 { 585 ret=SSL_PKEY_DSA_SIGN; 586 } 587#ifndef OPENSSL_NO_EC 588 else if (i == EVP_PKEY_EC) 589 { 590 ret = SSL_PKEY_ECC; 591 } 592#endif 593 else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc) 594 { 595 ret = SSL_PKEY_GOST94; 596 } 597 else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc) 598 { 599 ret = SSL_PKEY_GOST01; 600 } 601err: 602 if(!pkey) EVP_PKEY_free(pk); 603 return(ret); 604 } 605 606int ssl_verify_alarm_type(long type) 607 { 608 int al; 609 610 switch(type) 611 { 612 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: 613 case X509_V_ERR_UNABLE_TO_GET_CRL: 614 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: 615 al=SSL_AD_UNKNOWN_CA; 616 break; 617 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: 618 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: 619 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: 620 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: 621 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: 622 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: 623 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: 624 case X509_V_ERR_CERT_NOT_YET_VALID: 625 case X509_V_ERR_CRL_NOT_YET_VALID: 626 case X509_V_ERR_CERT_UNTRUSTED: 627 case X509_V_ERR_CERT_REJECTED: 628 al=SSL_AD_BAD_CERTIFICATE; 629 break; 630 case X509_V_ERR_CERT_SIGNATURE_FAILURE: 631 case X509_V_ERR_CRL_SIGNATURE_FAILURE: 632 al=SSL_AD_DECRYPT_ERROR; 633 break; 634 case X509_V_ERR_CERT_HAS_EXPIRED: 635 case X509_V_ERR_CRL_HAS_EXPIRED: 636 al=SSL_AD_CERTIFICATE_EXPIRED; 637 break; 638 case X509_V_ERR_CERT_REVOKED: 639 al=SSL_AD_CERTIFICATE_REVOKED; 640 break; 641 case X509_V_ERR_OUT_OF_MEM: 642 al=SSL_AD_INTERNAL_ERROR; 643 break; 644 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: 645 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: 646 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: 647 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: 648 case X509_V_ERR_CERT_CHAIN_TOO_LONG: 649 case X509_V_ERR_PATH_LENGTH_EXCEEDED: 650 case X509_V_ERR_INVALID_CA: 651 al=SSL_AD_UNKNOWN_CA; 652 break; 653 case X509_V_ERR_APPLICATION_VERIFICATION: 654 al=SSL_AD_HANDSHAKE_FAILURE; 655 break; 656 case X509_V_ERR_INVALID_PURPOSE: 657 al=SSL_AD_UNSUPPORTED_CERTIFICATE; 658 break; 659 default: 660 al=SSL_AD_CERTIFICATE_UNKNOWN; 661 break; 662 } 663 return(al); 664 } 665 666#ifndef OPENSSL_NO_BUF_FREELISTS 667/* On some platforms, malloc() performance is bad enough that you can't just 668 * free() and malloc() buffers all the time, so we need to use freelists from 669 * unused buffers. Currently, each freelist holds memory chunks of only a 670 * given size (list->chunklen); other sized chunks are freed and malloced. 671 * This doesn't help much if you're using many different SSL option settings 672 * with a given context. (The options affecting buffer size are 673 * max_send_fragment, read buffer vs write buffer, 674 * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and 675 * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.) Using a separate freelist for every 676 * possible size is not an option, since max_send_fragment can take on many 677 * different values. 678 * 679 * If you are on a platform with a slow malloc(), and you're using SSL 680 * connections with many different settings for these options, and you need to 681 * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options: 682 * - Link against a faster malloc implementation. 683 * - Use a separate SSL_CTX for each option set. 684 * - Improve this code. 685 */ 686static void * 687freelist_extract(SSL_CTX *ctx, int for_read, int sz) 688 { 689 SSL3_BUF_FREELIST *list; 690 SSL3_BUF_FREELIST_ENTRY *ent = NULL; 691 void *result = NULL; 692 693 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 694 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist; 695 if (list != NULL && sz == (int)list->chunklen) 696 ent = list->head; 697 if (ent != NULL) 698 { 699 list->head = ent->next; 700 result = ent; 701 if (--list->len == 0) 702 list->chunklen = 0; 703 } 704 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 705 if (!result) 706 result = OPENSSL_malloc(sz); 707 return result; 708} 709 710static void 711freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem) 712 { 713 SSL3_BUF_FREELIST *list; 714 SSL3_BUF_FREELIST_ENTRY *ent; 715 716 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 717 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist; 718 if (list != NULL && 719 (sz == list->chunklen || list->chunklen == 0) && 720 list->len < ctx->freelist_max_len && 721 sz >= sizeof(*ent)) 722 { 723 list->chunklen = sz; 724 ent = mem; 725 ent->next = list->head; 726 list->head = ent; 727 ++list->len; 728 mem = NULL; 729 } 730 731 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 732 if (mem) 733 OPENSSL_free(mem); 734 } 735#else 736#define freelist_extract(c,fr,sz) OPENSSL_malloc(sz) 737#define freelist_insert(c,fr,sz,m) OPENSSL_free(m) 738#endif 739 740int ssl3_setup_read_buffer(SSL *s) 741 { 742 unsigned char *p; 743 size_t len,align=0,headerlen; 744 745 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 746 headerlen = DTLS1_RT_HEADER_LENGTH; 747 else 748 headerlen = SSL3_RT_HEADER_LENGTH; 749 750#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 751 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1); 752#endif 753 754 if (s->s3->rbuf.buf == NULL) 755 { 756 len = SSL3_RT_MAX_PLAIN_LENGTH 757 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD 758 + headerlen + align; 759 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) 760 { 761 s->s3->init_extra = 1; 762 len += SSL3_RT_MAX_EXTRA; 763 } 764#ifndef OPENSSL_NO_COMP 765 if (!(s->options & SSL_OP_NO_COMPRESSION)) 766 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD; 767#endif 768 if ((p=freelist_extract(s->ctx, 1, len)) == NULL) 769 goto err; 770 s->s3->rbuf.buf = p; 771 s->s3->rbuf.len = len; 772 } 773 774 s->packet= &(s->s3->rbuf.buf[0]); 775 return 1; 776 777err: 778 SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER,ERR_R_MALLOC_FAILURE); 779 return 0; 780 } 781 782int ssl3_setup_write_buffer(SSL *s) 783 { 784 unsigned char *p; 785 size_t len,align=0,headerlen; 786 787 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 788 headerlen = DTLS1_RT_HEADER_LENGTH + 1; 789 else 790 headerlen = SSL3_RT_HEADER_LENGTH; 791 792#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 793 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1); 794#endif 795 796 if (s->s3->wbuf.buf == NULL) 797 { 798 len = s->max_send_fragment 799 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD 800 + headerlen + align; 801#ifndef OPENSSL_NO_COMP 802 if (!(s->options & SSL_OP_NO_COMPRESSION)) 803 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD; 804#endif 805 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) 806 len += headerlen + align 807 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD; 808 809 if ((p=freelist_extract(s->ctx, 0, len)) == NULL) 810 goto err; 811 s->s3->wbuf.buf = p; 812 s->s3->wbuf.len = len; 813 } 814 815 return 1; 816 817err: 818 SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER,ERR_R_MALLOC_FAILURE); 819 return 0; 820 } 821 822 823int ssl3_setup_buffers(SSL *s) 824 { 825 if (!ssl3_setup_read_buffer(s)) 826 return 0; 827 if (!ssl3_setup_write_buffer(s)) 828 return 0; 829 return 1; 830 } 831 832int ssl3_release_write_buffer(SSL *s) 833 { 834 if (s->s3->wbuf.buf != NULL) 835 { 836 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf); 837 s->s3->wbuf.buf = NULL; 838 } 839 return 1; 840 } 841 842int ssl3_release_read_buffer(SSL *s) 843 { 844 if (s->s3->rbuf.buf != NULL) 845 { 846 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf); 847 s->s3->rbuf.buf = NULL; 848 } 849 return 1; 850 } 851 852