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 const char *sender; 209 int slen; 210 211 if (s->state & SSL_ST_CONNECT) 212 { 213 sender=s->method->ssl3_enc->server_finished_label; 214 slen=s->method->ssl3_enc->server_finished_label_len; 215 } 216 else 217 { 218 sender=s->method->ssl3_enc->client_finished_label; 219 slen=s->method->ssl3_enc->client_finished_label_len; 220 } 221 222 s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s, 223 sender,slen,s->s3->tmp.peer_finish_md); 224} 225#endif 226 227int ssl3_get_finished(SSL *s, int a, int b) 228 { 229 int al,i,ok; 230 long n; 231 unsigned char *p; 232 233#ifdef OPENSSL_NO_NEXTPROTONEG 234 /* the mac has already been generated when we received the change 235 * cipher spec message and is in s->s3->tmp.peer_finish_md. */ 236#endif 237 238 n=s->method->ssl_get_message(s, 239 a, 240 b, 241 SSL3_MT_FINISHED, 242 64, /* should actually be 36+4 :-) */ 243 &ok); 244 245 if (!ok) return((int)n); 246 247 /* If this occurs, we have missed a message */ 248 if (!s->s3->change_cipher_spec) 249 { 250 al=SSL_AD_UNEXPECTED_MESSAGE; 251 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS); 252 goto f_err; 253 } 254 s->s3->change_cipher_spec=0; 255 256 p = (unsigned char *)s->init_msg; 257 i = s->s3->tmp.peer_finish_md_len; 258 259 if (i != n) 260 { 261 al=SSL_AD_DECODE_ERROR; 262 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH); 263 goto f_err; 264 } 265 266 if (memcmp(p, s->s3->tmp.peer_finish_md, i) != 0) 267 { 268 al=SSL_AD_DECRYPT_ERROR; 269 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED); 270 goto f_err; 271 } 272 273 /* Copy the finished so we can use it for 274 renegotiation checks */ 275 if(s->type == SSL_ST_ACCEPT) 276 { 277 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 278 memcpy(s->s3->previous_client_finished, 279 s->s3->tmp.peer_finish_md, i); 280 s->s3->previous_client_finished_len=i; 281 } 282 else 283 { 284 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 285 memcpy(s->s3->previous_server_finished, 286 s->s3->tmp.peer_finish_md, i); 287 s->s3->previous_server_finished_len=i; 288 } 289 290 return(1); 291f_err: 292 ssl3_send_alert(s,SSL3_AL_FATAL,al); 293 return(0); 294 } 295 296/* for these 2 messages, we need to 297 * ssl->enc_read_ctx re-init 298 * ssl->s3->read_sequence zero 299 * ssl->s3->read_mac_secret re-init 300 * ssl->session->read_sym_enc assign 301 * ssl->session->read_compression assign 302 * ssl->session->read_hash assign 303 */ 304int ssl3_send_change_cipher_spec(SSL *s, int a, int b) 305 { 306 unsigned char *p; 307 308 if (s->state == a) 309 { 310 p=(unsigned char *)s->init_buf->data; 311 *p=SSL3_MT_CCS; 312 s->init_num=1; 313 s->init_off=0; 314 315 s->state=b; 316 } 317 318 /* SSL3_ST_CW_CHANGE_B */ 319 return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC)); 320 } 321 322static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x) 323 { 324 int n; 325 unsigned char *p; 326 327 n=i2d_X509(x,NULL); 328 if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3))) 329 { 330 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF,ERR_R_BUF_LIB); 331 return(-1); 332 } 333 p=(unsigned char *)&(buf->data[*l]); 334 l2n3(n,p); 335 i2d_X509(x,&p); 336 *l+=n+3; 337 338 return(0); 339 } 340 341unsigned long ssl3_output_cert_chain(SSL *s, X509 *x) 342 { 343 unsigned char *p; 344 int i; 345 unsigned long l=7; 346 BUF_MEM *buf; 347 int no_chain; 348 STACK_OF(X509) *cert_chain; 349 350 cert_chain = SSL_get_certificate_chain(s, x); 351 352 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs || cert_chain) 353 no_chain = 1; 354 else 355 no_chain = 0; 356 357 /* TLSv1 sends a chain with nothing in it, instead of an alert */ 358 buf=s->init_buf; 359 if (!BUF_MEM_grow_clean(buf,10)) 360 { 361 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB); 362 return(0); 363 } 364 if (x != NULL) 365 { 366 if (no_chain) 367 { 368 if (ssl3_add_cert_to_buf(buf, &l, x)) 369 return(0); 370 } 371 else 372 { 373 X509_STORE_CTX xs_ctx; 374 375 if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL)) 376 { 377 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB); 378 return(0); 379 } 380 X509_verify_cert(&xs_ctx); 381 /* Don't leave errors in the queue */ 382 ERR_clear_error(); 383 for (i=0; i < sk_X509_num(xs_ctx.chain); i++) 384 { 385 x = sk_X509_value(xs_ctx.chain, i); 386 387 if (ssl3_add_cert_to_buf(buf, &l, x)) 388 { 389 X509_STORE_CTX_cleanup(&xs_ctx); 390 return 0; 391 } 392 } 393 X509_STORE_CTX_cleanup(&xs_ctx); 394 } 395 } 396 /* Thawte special :-) */ 397 for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++) 398 { 399 x=sk_X509_value(s->ctx->extra_certs,i); 400 if (ssl3_add_cert_to_buf(buf, &l, x)) 401 return(0); 402 } 403 404 for (i=0; i<sk_X509_num(cert_chain); i++) 405 if (ssl3_add_cert_to_buf(buf, &l, sk_X509_value(cert_chain,i))) 406 return(0); 407 408 l-=7; 409 p=(unsigned char *)&(buf->data[4]); 410 l2n3(l,p); 411 l+=3; 412 p=(unsigned char *)&(buf->data[0]); 413 *(p++)=SSL3_MT_CERTIFICATE; 414 l2n3(l,p); 415 l+=4; 416 return(l); 417 } 418 419/* Obtain handshake message of message type 'mt' (any if mt == -1), 420 * maximum acceptable body length 'max'. 421 * The first four bytes (msg_type and length) are read in state 'st1', 422 * the body is read in state 'stn'. 423 */ 424long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok) 425 { 426 unsigned char *p; 427 unsigned long l; 428 long n; 429 int i,al; 430 431 if (s->s3->tmp.reuse_message) 432 { 433 s->s3->tmp.reuse_message=0; 434 if ((mt >= 0) && (s->s3->tmp.message_type != mt)) 435 { 436 al=SSL_AD_UNEXPECTED_MESSAGE; 437 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE); 438 goto f_err; 439 } 440 *ok=1; 441 s->init_msg = s->init_buf->data + 4; 442 s->init_num = (int)s->s3->tmp.message_size; 443 return s->init_num; 444 } 445 446 p=(unsigned char *)s->init_buf->data; 447 448 if (s->state == st1) /* s->init_num < 4 */ 449 { 450 int skip_message; 451 452 do 453 { 454 while (s->init_num < 4) 455 { 456 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE, 457 &p[s->init_num],4 - s->init_num, 0); 458 if (i <= 0) 459 { 460 s->rwstate=SSL_READING; 461 *ok = 0; 462 return i; 463 } 464 s->init_num+=i; 465 } 466 467 skip_message = 0; 468 if (!s->server) 469 if (p[0] == SSL3_MT_HELLO_REQUEST) 470 /* The server may always send 'Hello Request' messages -- 471 * we are doing a handshake anyway now, so ignore them 472 * if their format is correct. Does not count for 473 * 'Finished' MAC. */ 474 if (p[1] == 0 && p[2] == 0 &&p[3] == 0) 475 { 476 s->init_num = 0; 477 skip_message = 1; 478 479 if (s->msg_callback) 480 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg); 481 } 482 } 483 while (skip_message); 484 485 /* s->init_num == 4 */ 486 487 if ((mt >= 0) && (*p != mt)) 488 { 489 al=SSL_AD_UNEXPECTED_MESSAGE; 490 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE); 491 goto f_err; 492 } 493 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) && 494 (st1 == SSL3_ST_SR_CERT_A) && 495 (stn == SSL3_ST_SR_CERT_B)) 496 { 497 /* At this point we have got an MS SGC second client 498 * hello (maybe we should always allow the client to 499 * start a new handshake?). We need to restart the mac. 500 * Don't increment {num,total}_renegotiations because 501 * we have not completed the handshake. */ 502 ssl3_init_finished_mac(s); 503 } 504 505 s->s3->tmp.message_type= *(p++); 506 507 n2l3(p,l); 508 if (l > (unsigned long)max) 509 { 510 al=SSL_AD_ILLEGAL_PARAMETER; 511 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE); 512 goto f_err; 513 } 514 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */ 515 { 516 al=SSL_AD_ILLEGAL_PARAMETER; 517 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE); 518 goto f_err; 519 } 520 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4)) 521 { 522 SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB); 523 goto err; 524 } 525 s->s3->tmp.message_size=l; 526 s->state=stn; 527 528 s->init_msg = s->init_buf->data + 4; 529 s->init_num = 0; 530 } 531 532 /* next state (stn) */ 533 p = s->init_msg; 534 n = s->s3->tmp.message_size - s->init_num; 535 while (n > 0) 536 { 537 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0); 538 if (i <= 0) 539 { 540 s->rwstate=SSL_READING; 541 *ok = 0; 542 return i; 543 } 544 s->init_num += i; 545 n -= i; 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 /* Feed this message into MAC computation. */ 554 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4); 555 if (s->msg_callback) 556 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg); 557 *ok=1; 558 return s->init_num; 559f_err: 560 ssl3_send_alert(s,SSL3_AL_FATAL,al); 561err: 562 *ok=0; 563 return(-1); 564 } 565 566int ssl_cert_type(X509 *x, EVP_PKEY *pkey) 567 { 568 EVP_PKEY *pk; 569 int ret= -1,i; 570 571 if (pkey == NULL) 572 pk=X509_get_pubkey(x); 573 else 574 pk=pkey; 575 if (pk == NULL) goto err; 576 577 i=pk->type; 578 if (i == EVP_PKEY_RSA) 579 { 580 ret=SSL_PKEY_RSA_ENC; 581 } 582 else if (i == EVP_PKEY_DSA) 583 { 584 ret=SSL_PKEY_DSA_SIGN; 585 } 586#ifndef OPENSSL_NO_EC 587 else if (i == EVP_PKEY_EC) 588 { 589 ret = SSL_PKEY_ECC; 590 } 591#endif 592 else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc) 593 { 594 ret = SSL_PKEY_GOST94; 595 } 596 else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc) 597 { 598 ret = SSL_PKEY_GOST01; 599 } 600err: 601 if(!pkey) EVP_PKEY_free(pk); 602 return(ret); 603 } 604 605int ssl_verify_alarm_type(long type) 606 { 607 int al; 608 609 switch(type) 610 { 611 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: 612 case X509_V_ERR_UNABLE_TO_GET_CRL: 613 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: 614 al=SSL_AD_UNKNOWN_CA; 615 break; 616 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: 617 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: 618 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: 619 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: 620 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: 621 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: 622 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: 623 case X509_V_ERR_CERT_NOT_YET_VALID: 624 case X509_V_ERR_CRL_NOT_YET_VALID: 625 case X509_V_ERR_CERT_UNTRUSTED: 626 case X509_V_ERR_CERT_REJECTED: 627 al=SSL_AD_BAD_CERTIFICATE; 628 break; 629 case X509_V_ERR_CERT_SIGNATURE_FAILURE: 630 case X509_V_ERR_CRL_SIGNATURE_FAILURE: 631 al=SSL_AD_DECRYPT_ERROR; 632 break; 633 case X509_V_ERR_CERT_HAS_EXPIRED: 634 case X509_V_ERR_CRL_HAS_EXPIRED: 635 al=SSL_AD_CERTIFICATE_EXPIRED; 636 break; 637 case X509_V_ERR_CERT_REVOKED: 638 al=SSL_AD_CERTIFICATE_REVOKED; 639 break; 640 case X509_V_ERR_OUT_OF_MEM: 641 al=SSL_AD_INTERNAL_ERROR; 642 break; 643 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: 644 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: 645 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: 646 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: 647 case X509_V_ERR_CERT_CHAIN_TOO_LONG: 648 case X509_V_ERR_PATH_LENGTH_EXCEEDED: 649 case X509_V_ERR_INVALID_CA: 650 al=SSL_AD_UNKNOWN_CA; 651 break; 652 case X509_V_ERR_APPLICATION_VERIFICATION: 653 al=SSL_AD_HANDSHAKE_FAILURE; 654 break; 655 case X509_V_ERR_INVALID_PURPOSE: 656 al=SSL_AD_UNSUPPORTED_CERTIFICATE; 657 break; 658 default: 659 al=SSL_AD_CERTIFICATE_UNKNOWN; 660 break; 661 } 662 return(al); 663 } 664 665#ifndef OPENSSL_NO_BUF_FREELISTS 666/* On some platforms, malloc() performance is bad enough that you can't just 667 * free() and malloc() buffers all the time, so we need to use freelists from 668 * unused buffers. Currently, each freelist holds memory chunks of only a 669 * given size (list->chunklen); other sized chunks are freed and malloced. 670 * This doesn't help much if you're using many different SSL option settings 671 * with a given context. (The options affecting buffer size are 672 * max_send_fragment, read buffer vs write buffer, 673 * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and 674 * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.) Using a separate freelist for every 675 * possible size is not an option, since max_send_fragment can take on many 676 * different values. 677 * 678 * If you are on a platform with a slow malloc(), and you're using SSL 679 * connections with many different settings for these options, and you need to 680 * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options: 681 * - Link against a faster malloc implementation. 682 * - Use a separate SSL_CTX for each option set. 683 * - Improve this code. 684 */ 685static void * 686freelist_extract(SSL_CTX *ctx, int for_read, int sz) 687 { 688 SSL3_BUF_FREELIST *list; 689 SSL3_BUF_FREELIST_ENTRY *ent = NULL; 690 void *result = NULL; 691 692 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 693 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist; 694 if (list != NULL && sz == (int)list->chunklen) 695 ent = list->head; 696 if (ent != NULL) 697 { 698 list->head = ent->next; 699 result = ent; 700 if (--list->len == 0) 701 list->chunklen = 0; 702 } 703 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 704 if (!result) 705 result = OPENSSL_malloc(sz); 706 return result; 707} 708 709static void 710freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem) 711 { 712 SSL3_BUF_FREELIST *list; 713 SSL3_BUF_FREELIST_ENTRY *ent; 714 715 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 716 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist; 717 if (list != NULL && 718 (sz == list->chunklen || list->chunklen == 0) && 719 list->len < ctx->freelist_max_len && 720 sz >= sizeof(*ent)) 721 { 722 list->chunklen = sz; 723 ent = mem; 724 ent->next = list->head; 725 list->head = ent; 726 ++list->len; 727 mem = NULL; 728 } 729 730 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 731 if (mem) 732 OPENSSL_free(mem); 733 } 734#else 735#define freelist_extract(c,fr,sz) OPENSSL_malloc(sz) 736#define freelist_insert(c,fr,sz,m) OPENSSL_free(m) 737#endif 738 739int ssl3_setup_read_buffer(SSL *s) 740 { 741 unsigned char *p; 742 size_t len,align=0,headerlen; 743 744 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 745 headerlen = DTLS1_RT_HEADER_LENGTH; 746 else 747 headerlen = SSL3_RT_HEADER_LENGTH; 748 749#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 750 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1); 751#endif 752 753 if (s->s3->rbuf.buf == NULL) 754 { 755 if (SSL_get_mode(s) & SSL_MODE_SMALL_BUFFERS) 756 { 757 len = SSL3_RT_DEFAULT_PACKET_SIZE; 758 } 759 else 760 { 761 len = SSL3_RT_MAX_PLAIN_LENGTH 762 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD 763 + headerlen + align; 764 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) 765 { 766 s->s3->init_extra = 1; 767 len += SSL3_RT_MAX_EXTRA; 768 } 769 } 770#ifndef OPENSSL_NO_COMP 771 if (!(s->options & SSL_OP_NO_COMPRESSION)) 772 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD; 773#endif 774 if ((p=freelist_extract(s->ctx, 1, len)) == NULL) 775 goto err; 776 s->s3->rbuf.buf = p; 777 s->s3->rbuf.len = len; 778 } 779 780 s->packet= &(s->s3->rbuf.buf[0]); 781 return 1; 782 783err: 784 SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER,ERR_R_MALLOC_FAILURE); 785 return 0; 786 } 787 788int ssl3_setup_write_buffer(SSL *s) 789 { 790 unsigned char *p; 791 size_t len,align=0,headerlen; 792 793 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 794 headerlen = DTLS1_RT_HEADER_LENGTH + 1; 795 else 796 headerlen = SSL3_RT_HEADER_LENGTH; 797 798#if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 799 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1); 800#endif 801 802 if (s->s3->wbuf.buf == NULL) 803 { 804 if (SSL_get_mode(s) & SSL_MODE_SMALL_BUFFERS) 805 { 806 len = SSL3_RT_DEFAULT_PACKET_SIZE; 807 } 808 else 809 { 810 len = s->max_send_fragment; 811 } 812 len += 0 813 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD 814 + headerlen + align; 815#ifndef OPENSSL_NO_COMP 816 if (!(s->options & SSL_OP_NO_COMPRESSION)) 817 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD; 818#endif 819 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) 820 len += headerlen + align 821 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD; 822 if ((p=freelist_extract(s->ctx, 0, len)) == NULL) 823 goto err; 824 s->s3->wbuf.buf = p; 825 s->s3->wbuf.len = len; 826 } 827 828 return 1; 829 830err: 831 SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER,ERR_R_MALLOC_FAILURE); 832 return 0; 833 } 834 835 836int ssl3_setup_buffers(SSL *s) 837 { 838 if (!ssl3_setup_read_buffer(s)) 839 return 0; 840 if (!ssl3_setup_write_buffer(s)) 841 return 0; 842 return 1; 843 } 844 845int ssl3_release_write_buffer(SSL *s) 846 { 847 if (s->s3->wbuf.buf != NULL) 848 { 849 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf); 850 s->s3->wbuf.buf = NULL; 851 } 852 return 1; 853 } 854 855int ssl3_release_read_buffer(SSL *s) 856 { 857 if (s->s3->rbuf.buf != NULL) 858 { 859 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf); 860 s->s3->rbuf.buf = NULL; 861 } 862 return 1; 863 } 864