1 /* ssl/s3_both.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh (at) cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay (at) cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh (at) cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 /* ==================================================================== 59 * Copyright (c) 1998-2002 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 (at) openssl.org. 82 * 83 * 5. Products derived from this software may not be called "OpenSSL" 84 * nor may "OpenSSL" appear in their names without prior written 85 * permission of the OpenSSL Project. 86 * 87 * 6. Redistributions of any form whatsoever must retain the following 88 * acknowledgment: 89 * "This product includes software developed by the OpenSSL Project 90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)" 91 * 92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 103 * OF THE POSSIBILITY OF SUCH DAMAGE. 104 * ==================================================================== 105 * 106 * This product includes cryptographic software written by Eric Young 107 * (eay (at) cryptsoft.com). This product includes software written by Tim 108 * Hudson (tjh (at) cryptsoft.com). 109 * 110 */ 111 /* ==================================================================== 112 * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. 113 * 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) */ 128 int 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 } 150 151 int 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 if (i == 0) 165 return 0; 166 s->s3->tmp.finish_md_len = i; 167 memcpy(p, s->s3->tmp.finish_md, i); 168 p+=i; 169 l=i; 170 171 /* Copy the finished so we can use it for 172 renegotiation checks */ 173 if(s->type == SSL_ST_CONNECT) 174 { 175 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 176 memcpy(s->s3->previous_client_finished, 177 s->s3->tmp.finish_md, i); 178 s->s3->previous_client_finished_len=i; 179 } 180 else 181 { 182 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 183 memcpy(s->s3->previous_server_finished, 184 s->s3->tmp.finish_md, i); 185 s->s3->previous_server_finished_len=i; 186 } 187 188 #ifdef OPENSSL_SYS_WIN16 189 /* MSVC 1.5 does not clear the top bytes of the word unless 190 * I do this. 191 */ 192 l&=0xffff; 193 #endif 194 195 *(d++)=SSL3_MT_FINISHED; 196 l2n3(l,d); 197 s->init_num=(int)l+4; 198 s->init_off=0; 199 200 s->state=b; 201 } 202 203 /* SSL3_ST_SEND_xxxxxx_HELLO_B */ 204 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 205 } 206 207 #ifndef OPENSSL_NO_NEXTPROTONEG 208 /* ssl3_take_mac calculates the Finished MAC for the handshakes messages seen to far. */ 209 static void ssl3_take_mac(SSL *s) 210 { 211 const char *sender; 212 int slen; 213 /* If no new cipher setup return immediately: other functions will 214 * set the appropriate error. 215 */ 216 if (s->s3->tmp.new_cipher == NULL) 217 return; 218 if (s->state & SSL_ST_CONNECT) 219 { 220 sender=s->method->ssl3_enc->server_finished_label; 221 slen=s->method->ssl3_enc->server_finished_label_len; 222 } 223 else 224 { 225 sender=s->method->ssl3_enc->client_finished_label; 226 slen=s->method->ssl3_enc->client_finished_label_len; 227 } 228 229 s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s, 230 sender,slen,s->s3->tmp.peer_finish_md); 231 } 232 #endif 233 234 int ssl3_get_finished(SSL *s, int a, int b) 235 { 236 int al,i,ok; 237 long n; 238 unsigned char *p; 239 240 #ifdef OPENSSL_NO_NEXTPROTONEG 241 /* the mac has already been generated when we received the 242 * change cipher spec message and is in s->s3->tmp.peer_finish_md. 243 */ 244 #endif 245 246 n=s->method->ssl_get_message(s, 247 a, 248 b, 249 SSL3_MT_FINISHED, 250 64, /* should actually be 36+4 :-) */ 251 &ok); 252 253 if (!ok) return((int)n); 254 255 /* If this occurs, we have missed a message */ 256 if (!s->s3->change_cipher_spec) 257 { 258 al=SSL_AD_UNEXPECTED_MESSAGE; 259 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS); 260 goto f_err; 261 } 262 s->s3->change_cipher_spec=0; 263 264 p = (unsigned char *)s->init_msg; 265 i = s->s3->tmp.peer_finish_md_len; 266 267 if (i != n) 268 { 269 al=SSL_AD_DECODE_ERROR; 270 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH); 271 goto f_err; 272 } 273 274 if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0) 275 { 276 al=SSL_AD_DECRYPT_ERROR; 277 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED); 278 goto f_err; 279 } 280 281 /* Copy the finished so we can use it for 282 renegotiation checks */ 283 if(s->type == SSL_ST_ACCEPT) 284 { 285 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 286 memcpy(s->s3->previous_client_finished, 287 s->s3->tmp.peer_finish_md, i); 288 s->s3->previous_client_finished_len=i; 289 } 290 else 291 { 292 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 293 memcpy(s->s3->previous_server_finished, 294 s->s3->tmp.peer_finish_md, i); 295 s->s3->previous_server_finished_len=i; 296 } 297 298 return(1); 299 f_err: 300 ssl3_send_alert(s,SSL3_AL_FATAL,al); 301 return(0); 302 } 303 304 /* for these 2 messages, we need to 305 * ssl->enc_read_ctx re-init 306 * ssl->s3->read_sequence zero 307 * ssl->s3->read_mac_secret re-init 308 * ssl->session->read_sym_enc assign 309 * ssl->session->read_compression assign 310 * ssl->session->read_hash assign 311 */ 312 int ssl3_send_change_cipher_spec(SSL *s, int a, int b) 313 { 314 unsigned char *p; 315 316 if (s->state == a) 317 { 318 p=(unsigned char *)s->init_buf->data; 319 *p=SSL3_MT_CCS; 320 s->init_num=1; 321 s->init_off=0; 322 323 s->state=b; 324 } 325 326 /* SSL3_ST_CW_CHANGE_B */ 327 return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC)); 328 } 329 330 static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x) 331 { 332 int n; 333 unsigned char *p; 334 335 n=i2d_X509(x,NULL); 336 if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3))) 337 { 338 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF,ERR_R_BUF_LIB); 339 return(-1); 340 } 341 p=(unsigned char *)&(buf->data[*l]); 342 l2n3(n,p); 343 i2d_X509(x,&p); 344 *l+=n+3; 345 346 return(0); 347 } 348 349 unsigned long ssl3_output_cert_chain(SSL *s, X509 *x) 350 { 351 unsigned char *p; 352 int i; 353 unsigned long l=7; 354 BUF_MEM *buf; 355 int no_chain; 356 STACK_OF(X509) *cert_chain; 357 358 cert_chain = SSL_get_certificate_chain(s, x); 359 360 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs || cert_chain) 361 no_chain = 1; 362 else 363 no_chain = 0; 364 365 /* TLSv1 sends a chain with nothing in it, instead of an alert */ 366 buf=s->init_buf; 367 if (!BUF_MEM_grow_clean(buf,10)) 368 { 369 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB); 370 return(0); 371 } 372 if (x != NULL) 373 { 374 if (no_chain) 375 { 376 if (ssl3_add_cert_to_buf(buf, &l, x)) 377 return(0); 378 } 379 else 380 { 381 X509_STORE_CTX xs_ctx; 382 383 if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL)) 384 { 385 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB); 386 return(0); 387 } 388 X509_verify_cert(&xs_ctx); 389 /* Don't leave errors in the queue */ 390 ERR_clear_error(); 391 for (i=0; i < sk_X509_num(xs_ctx.chain); i++) 392 { 393 x = sk_X509_value(xs_ctx.chain, i); 394 395 if (ssl3_add_cert_to_buf(buf, &l, x)) 396 { 397 X509_STORE_CTX_cleanup(&xs_ctx); 398 return 0; 399 } 400 } 401 X509_STORE_CTX_cleanup(&xs_ctx); 402 } 403 } 404 /* Thawte special :-) */ 405 for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++) 406 { 407 x=sk_X509_value(s->ctx->extra_certs,i); 408 if (ssl3_add_cert_to_buf(buf, &l, x)) 409 return(0); 410 } 411 412 for (i=0; i<sk_X509_num(cert_chain); i++) 413 if (ssl3_add_cert_to_buf(buf, &l, sk_X509_value(cert_chain,i))) 414 return(0); 415 416 l-=7; 417 p=(unsigned char *)&(buf->data[4]); 418 l2n3(l,p); 419 l+=3; 420 p=(unsigned char *)&(buf->data[0]); 421 *(p++)=SSL3_MT_CERTIFICATE; 422 l2n3(l,p); 423 l+=4; 424 return(l); 425 } 426 427 /* Obtain handshake message of message type 'mt' (any if mt == -1), 428 * maximum acceptable body length 'max'. 429 * The first four bytes (msg_type and length) are read in state 'st1', 430 * the body is read in state 'stn'. 431 */ 432 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok) 433 { 434 unsigned char *p; 435 unsigned long l; 436 long n; 437 int i,al; 438 439 if (s->s3->tmp.reuse_message) 440 { 441 s->s3->tmp.reuse_message=0; 442 if ((mt >= 0) && (s->s3->tmp.message_type != mt)) 443 { 444 al=SSL_AD_UNEXPECTED_MESSAGE; 445 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE); 446 goto f_err; 447 } 448 *ok=1; 449 s->init_msg = s->init_buf->data + 4; 450 s->init_num = (int)s->s3->tmp.message_size; 451 return s->init_num; 452 } 453 454 p=(unsigned char *)s->init_buf->data; 455 456 if (s->state == st1) /* s->init_num < 4 */ 457 { 458 int skip_message; 459 460 do 461 { 462 while (s->init_num < 4) 463 { 464 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE, 465 &p[s->init_num],4 - s->init_num, 0); 466 if (i <= 0) 467 { 468 s->rwstate=SSL_READING; 469 *ok = 0; 470 return i; 471 } 472 s->init_num+=i; 473 } 474 475 skip_message = 0; 476 if (!s->server) 477 if (p[0] == SSL3_MT_HELLO_REQUEST) 478 /* The server may always send 'Hello Request' messages -- 479 * we are doing a handshake anyway now, so ignore them 480 * if their format is correct. Does not count for 481 * 'Finished' MAC. */ 482 if (p[1] == 0 && p[2] == 0 &&p[3] == 0) 483 { 484 s->init_num = 0; 485 skip_message = 1; 486 487 if (s->msg_callback) 488 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg); 489 } 490 } 491 while (skip_message); 492 493 /* s->init_num == 4 */ 494 495 if ((mt >= 0) && (*p != mt)) 496 { 497 al=SSL_AD_UNEXPECTED_MESSAGE; 498 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE); 499 goto f_err; 500 } 501 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) && 502 (st1 == SSL3_ST_SR_CERT_A) && 503 (stn == SSL3_ST_SR_CERT_B)) 504 { 505 /* At this point we have got an MS SGC second client 506 * hello (maybe we should always allow the client to 507 * start a new handshake?). We need to restart the mac. 508 * Don't increment {num,total}_renegotiations because 509 * we have not completed the handshake. */ 510 ssl3_init_finished_mac(s); 511 } 512 513 s->s3->tmp.message_type= *(p++); 514 515 n2l3(p,l); 516 if (l > (unsigned long)max) 517 { 518 al=SSL_AD_ILLEGAL_PARAMETER; 519 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE); 520 goto f_err; 521 } 522 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */ 523 { 524 al=SSL_AD_ILLEGAL_PARAMETER; 525 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE); 526 goto f_err; 527 } 528 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4)) 529 { 530 SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB); 531 goto err; 532 } 533 s->s3->tmp.message_size=l; 534 s->state=stn; 535 536 s->init_msg = s->init_buf->data + 4; 537 s->init_num = 0; 538 } 539 540 /* next state (stn) */ 541 p = s->init_msg; 542 n = s->s3->tmp.message_size - s->init_num; 543 while (n > 0) 544 { 545 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0); 546 if (i <= 0) 547 { 548 s->rwstate=SSL_READING; 549 *ok = 0; 550 return i; 551 } 552 s->init_num += i; 553 n -= i; 554 } 555 556 #ifndef OPENSSL_NO_NEXTPROTONEG 557 /* If receiving Finished, record MAC of prior handshake messages for 558 * Finished verification. */ 559 if (*s->init_buf->data == SSL3_MT_FINISHED) 560 ssl3_take_mac(s); 561 #endif 562 563 /* Feed this message into MAC computation. */ 564 if (*((unsigned char*) s->init_buf->data) != SSL3_MT_ENCRYPTED_EXTENSIONS) 565 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4); 566 if (s->msg_callback) 567 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg); 568 *ok=1; 569 return s->init_num; 570 f_err: 571 ssl3_send_alert(s,SSL3_AL_FATAL,al); 572 err: 573 *ok=0; 574 return(-1); 575 } 576 577 int ssl_cert_type(X509 *x, EVP_PKEY *pkey) 578 { 579 EVP_PKEY *pk; 580 int ret= -1,i; 581 582 if (pkey == NULL) 583 pk=X509_get_pubkey(x); 584 else 585 pk=pkey; 586 if (pk == NULL) goto err; 587 588 i=pk->type; 589 if (i == EVP_PKEY_RSA) 590 { 591 ret=SSL_PKEY_RSA_ENC; 592 } 593 else if (i == EVP_PKEY_DSA) 594 { 595 ret=SSL_PKEY_DSA_SIGN; 596 } 597 #ifndef OPENSSL_NO_EC 598 else if (i == EVP_PKEY_EC) 599 { 600 ret = SSL_PKEY_ECC; 601 } 602 #endif 603 else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc) 604 { 605 ret = SSL_PKEY_GOST94; 606 } 607 else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc) 608 { 609 ret = SSL_PKEY_GOST01; 610 } 611 err: 612 if(!pkey) EVP_PKEY_free(pk); 613 return(ret); 614 } 615 616 int ssl_verify_alarm_type(long type) 617 { 618 int al; 619 620 switch(type) 621 { 622 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: 623 case X509_V_ERR_UNABLE_TO_GET_CRL: 624 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: 625 al=SSL_AD_UNKNOWN_CA; 626 break; 627 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: 628 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: 629 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: 630 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: 631 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: 632 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: 633 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: 634 case X509_V_ERR_CERT_NOT_YET_VALID: 635 case X509_V_ERR_CRL_NOT_YET_VALID: 636 case X509_V_ERR_CERT_UNTRUSTED: 637 case X509_V_ERR_CERT_REJECTED: 638 al=SSL_AD_BAD_CERTIFICATE; 639 break; 640 case X509_V_ERR_CERT_SIGNATURE_FAILURE: 641 case X509_V_ERR_CRL_SIGNATURE_FAILURE: 642 al=SSL_AD_DECRYPT_ERROR; 643 break; 644 case X509_V_ERR_CERT_HAS_EXPIRED: 645 case X509_V_ERR_CRL_HAS_EXPIRED: 646 al=SSL_AD_CERTIFICATE_EXPIRED; 647 break; 648 case X509_V_ERR_CERT_REVOKED: 649 al=SSL_AD_CERTIFICATE_REVOKED; 650 break; 651 case X509_V_ERR_OUT_OF_MEM: 652 al=SSL_AD_INTERNAL_ERROR; 653 break; 654 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: 655 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: 656 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: 657 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: 658 case X509_V_ERR_CERT_CHAIN_TOO_LONG: 659 case X509_V_ERR_PATH_LENGTH_EXCEEDED: 660 case X509_V_ERR_INVALID_CA: 661 al=SSL_AD_UNKNOWN_CA; 662 break; 663 case X509_V_ERR_APPLICATION_VERIFICATION: 664 al=SSL_AD_HANDSHAKE_FAILURE; 665 break; 666 case X509_V_ERR_INVALID_PURPOSE: 667 al=SSL_AD_UNSUPPORTED_CERTIFICATE; 668 break; 669 default: 670 al=SSL_AD_CERTIFICATE_UNKNOWN; 671 break; 672 } 673 return(al); 674 } 675 676 #ifndef OPENSSL_NO_BUF_FREELISTS 677 /* On some platforms, malloc() performance is bad enough that you can't just 678 * free() and malloc() buffers all the time, so we need to use freelists from 679 * unused buffers. Currently, each freelist holds memory chunks of only a 680 * given size (list->chunklen); other sized chunks are freed and malloced. 681 * This doesn't help much if you're using many different SSL option settings 682 * with a given context. (The options affecting buffer size are 683 * max_send_fragment, read buffer vs write buffer, 684 * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and 685 * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.) Using a separate freelist for every 686 * possible size is not an option, since max_send_fragment can take on many 687 * different values. 688 * 689 * If you are on a platform with a slow malloc(), and you're using SSL 690 * connections with many different settings for these options, and you need to 691 * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options: 692 * - Link against a faster malloc implementation. 693 * - Use a separate SSL_CTX for each option set. 694 * - Improve this code. 695 */ 696 static void * 697 freelist_extract(SSL_CTX *ctx, int for_read, int sz) 698 { 699 SSL3_BUF_FREELIST *list; 700 SSL3_BUF_FREELIST_ENTRY *ent = NULL; 701 void *result = NULL; 702 703 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 704 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist; 705 if (list != NULL && sz == (int)list->chunklen) 706 ent = list->head; 707 if (ent != NULL) 708 { 709 list->head = ent->next; 710 result = ent; 711 if (--list->len == 0) 712 list->chunklen = 0; 713 } 714 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 715 if (!result) 716 result = OPENSSL_malloc(sz); 717 return result; 718 } 719 720 static void 721 freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem) 722 { 723 SSL3_BUF_FREELIST *list; 724 SSL3_BUF_FREELIST_ENTRY *ent; 725 726 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 727 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist; 728 if (list != NULL && 729 (sz == list->chunklen || list->chunklen == 0) && 730 list->len < ctx->freelist_max_len && 731 sz >= sizeof(*ent)) 732 { 733 list->chunklen = sz; 734 ent = mem; 735 ent->next = list->head; 736 list->head = ent; 737 ++list->len; 738 mem = NULL; 739 } 740 741 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 742 if (mem) 743 OPENSSL_free(mem); 744 } 745 #else 746 #define freelist_extract(c,fr,sz) OPENSSL_malloc(sz) 747 #define freelist_insert(c,fr,sz,m) OPENSSL_free(m) 748 #endif 749 750 int ssl3_setup_read_buffer(SSL *s) 751 { 752 unsigned char *p; 753 size_t len,align=0,headerlen; 754 755 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 756 headerlen = DTLS1_RT_HEADER_LENGTH; 757 else 758 headerlen = SSL3_RT_HEADER_LENGTH; 759 760 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 761 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1); 762 #endif 763 764 if (s->s3->rbuf.buf == NULL) 765 { 766 len = SSL3_RT_MAX_PLAIN_LENGTH 767 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD 768 + headerlen + align; 769 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) 770 { 771 s->s3->init_extra = 1; 772 len += SSL3_RT_MAX_EXTRA; 773 } 774 #ifndef OPENSSL_NO_COMP 775 if (!(s->options & SSL_OP_NO_COMPRESSION)) 776 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD; 777 #endif 778 if ((p=freelist_extract(s->ctx, 1, len)) == NULL) 779 goto err; 780 s->s3->rbuf.buf = p; 781 s->s3->rbuf.len = len; 782 } 783 784 s->packet= &(s->s3->rbuf.buf[0]); 785 return 1; 786 787 err: 788 SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER,ERR_R_MALLOC_FAILURE); 789 return 0; 790 } 791 792 int ssl3_setup_write_buffer(SSL *s) 793 { 794 unsigned char *p; 795 size_t len,align=0,headerlen; 796 797 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 798 headerlen = DTLS1_RT_HEADER_LENGTH + 1; 799 else 800 headerlen = SSL3_RT_HEADER_LENGTH; 801 802 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 803 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1); 804 #endif 805 806 if (s->s3->wbuf.buf == NULL) 807 { 808 len = s->max_send_fragment 809 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD 810 + headerlen + align; 811 #ifndef OPENSSL_NO_COMP 812 if (!(s->options & SSL_OP_NO_COMPRESSION)) 813 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD; 814 #endif 815 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) 816 len += headerlen + align 817 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD; 818 819 if ((p=freelist_extract(s->ctx, 0, len)) == NULL) 820 goto err; 821 s->s3->wbuf.buf = p; 822 s->s3->wbuf.len = len; 823 } 824 825 return 1; 826 827 err: 828 SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER,ERR_R_MALLOC_FAILURE); 829 return 0; 830 } 831 832 833 int ssl3_setup_buffers(SSL *s) 834 { 835 if (!ssl3_setup_read_buffer(s)) 836 return 0; 837 if (!ssl3_setup_write_buffer(s)) 838 return 0; 839 return 1; 840 } 841 842 int ssl3_release_write_buffer(SSL *s) 843 { 844 if (s->s3->wbuf.buf != NULL) 845 { 846 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf); 847 s->s3->wbuf.buf = NULL; 848 } 849 return 1; 850 } 851 852 int ssl3_release_read_buffer(SSL *s) 853 { 854 if (s->s3->rbuf.buf != NULL) 855 { 856 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf); 857 s->s3->rbuf.buf = NULL; 858 } 859 return 1; 860 } 861 862
