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 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. */ 207 static void ssl3_take_mac(SSL *s) 208 { 209 const char *sender; 210 int slen; 211 212 if (s->state & SSL_ST_CONNECT) 213 { 214 sender=s->method->ssl3_enc->server_finished_label; 215 slen=s->method->ssl3_enc->server_finished_label_len; 216 } 217 else 218 { 219 sender=s->method->ssl3_enc->client_finished_label; 220 slen=s->method->ssl3_enc->client_finished_label_len; 221 } 222 223 s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s, 224 sender,slen,s->s3->tmp.peer_finish_md); 225 } 226 #endif 227 228 int ssl3_get_finished(SSL *s, int a, int b) 229 { 230 int al,i,ok; 231 long n; 232 unsigned char *p; 233 234 #ifdef OPENSSL_NO_NEXTPROTONEG 235 /* the mac has already been generated when we received the 236 * change cipher spec message and is in s->s3->tmp.peer_finish_md. 237 */ 238 #endif 239 240 n=s->method->ssl_get_message(s, 241 a, 242 b, 243 SSL3_MT_FINISHED, 244 64, /* should actually be 36+4 :-) */ 245 &ok); 246 247 if (!ok) return((int)n); 248 249 /* If this occurs, we have missed a message */ 250 if (!s->s3->change_cipher_spec) 251 { 252 al=SSL_AD_UNEXPECTED_MESSAGE; 253 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS); 254 goto f_err; 255 } 256 s->s3->change_cipher_spec=0; 257 258 p = (unsigned char *)s->init_msg; 259 i = s->s3->tmp.peer_finish_md_len; 260 261 if (i != n) 262 { 263 al=SSL_AD_DECODE_ERROR; 264 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH); 265 goto f_err; 266 } 267 268 if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0) 269 { 270 al=SSL_AD_DECRYPT_ERROR; 271 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED); 272 goto f_err; 273 } 274 275 /* Copy the finished so we can use it for 276 renegotiation checks */ 277 if(s->type == SSL_ST_ACCEPT) 278 { 279 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 280 memcpy(s->s3->previous_client_finished, 281 s->s3->tmp.peer_finish_md, i); 282 s->s3->previous_client_finished_len=i; 283 } 284 else 285 { 286 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 287 memcpy(s->s3->previous_server_finished, 288 s->s3->tmp.peer_finish_md, i); 289 s->s3->previous_server_finished_len=i; 290 } 291 292 return(1); 293 f_err: 294 ssl3_send_alert(s,SSL3_AL_FATAL,al); 295 return(0); 296 } 297 298 /* for these 2 messages, we need to 299 * ssl->enc_read_ctx re-init 300 * ssl->s3->read_sequence zero 301 * ssl->s3->read_mac_secret re-init 302 * ssl->session->read_sym_enc assign 303 * ssl->session->read_compression assign 304 * ssl->session->read_hash assign 305 */ 306 int ssl3_send_change_cipher_spec(SSL *s, int a, int b) 307 { 308 unsigned char *p; 309 310 if (s->state == a) 311 { 312 p=(unsigned char *)s->init_buf->data; 313 *p=SSL3_MT_CCS; 314 s->init_num=1; 315 s->init_off=0; 316 317 s->state=b; 318 } 319 320 /* SSL3_ST_CW_CHANGE_B */ 321 return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC)); 322 } 323 324 static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x) 325 { 326 int n; 327 unsigned char *p; 328 329 n=i2d_X509(x,NULL); 330 if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3))) 331 { 332 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF,ERR_R_BUF_LIB); 333 return(-1); 334 } 335 p=(unsigned char *)&(buf->data[*l]); 336 l2n3(n,p); 337 i2d_X509(x,&p); 338 *l+=n+3; 339 340 return(0); 341 } 342 343 unsigned long ssl3_output_cert_chain(SSL *s, X509 *x) 344 { 345 unsigned char *p; 346 int i; 347 unsigned long l=7; 348 BUF_MEM *buf; 349 int no_chain; 350 STACK_OF(X509) *cert_chain; 351 352 cert_chain = SSL_get_certificate_chain(s, x); 353 354 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs || cert_chain) 355 no_chain = 1; 356 else 357 no_chain = 0; 358 359 /* TLSv1 sends a chain with nothing in it, instead of an alert */ 360 buf=s->init_buf; 361 if (!BUF_MEM_grow_clean(buf,10)) 362 { 363 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB); 364 return(0); 365 } 366 if (x != NULL) 367 { 368 if (no_chain) 369 { 370 if (ssl3_add_cert_to_buf(buf, &l, x)) 371 return(0); 372 } 373 else 374 { 375 X509_STORE_CTX xs_ctx; 376 377 if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL)) 378 { 379 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB); 380 return(0); 381 } 382 X509_verify_cert(&xs_ctx); 383 /* Don't leave errors in the queue */ 384 ERR_clear_error(); 385 for (i=0; i < sk_X509_num(xs_ctx.chain); i++) 386 { 387 x = sk_X509_value(xs_ctx.chain, i); 388 389 if (ssl3_add_cert_to_buf(buf, &l, x)) 390 { 391 X509_STORE_CTX_cleanup(&xs_ctx); 392 return 0; 393 } 394 } 395 X509_STORE_CTX_cleanup(&xs_ctx); 396 } 397 } 398 /* Thawte special :-) */ 399 for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++) 400 { 401 x=sk_X509_value(s->ctx->extra_certs,i); 402 if (ssl3_add_cert_to_buf(buf, &l, x)) 403 return(0); 404 } 405 406 for (i=0; i<sk_X509_num(cert_chain); i++) 407 if (ssl3_add_cert_to_buf(buf, &l, sk_X509_value(cert_chain,i))) 408 return(0); 409 410 l-=7; 411 p=(unsigned char *)&(buf->data[4]); 412 l2n3(l,p); 413 l+=3; 414 p=(unsigned char *)&(buf->data[0]); 415 *(p++)=SSL3_MT_CERTIFICATE; 416 l2n3(l,p); 417 l+=4; 418 return(l); 419 } 420 421 /* Obtain handshake message of message type 'mt' (any if mt == -1), 422 * maximum acceptable body length 'max'. 423 * The first four bytes (msg_type and length) are read in state 'st1', 424 * the body is read in state 'stn'. 425 */ 426 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok) 427 { 428 unsigned char *p; 429 unsigned long l; 430 long n; 431 int i,al; 432 433 if (s->s3->tmp.reuse_message) 434 { 435 s->s3->tmp.reuse_message=0; 436 if ((mt >= 0) && (s->s3->tmp.message_type != mt)) 437 { 438 al=SSL_AD_UNEXPECTED_MESSAGE; 439 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE); 440 goto f_err; 441 } 442 *ok=1; 443 s->init_msg = s->init_buf->data + 4; 444 s->init_num = (int)s->s3->tmp.message_size; 445 return s->init_num; 446 } 447 448 p=(unsigned char *)s->init_buf->data; 449 450 if (s->state == st1) /* s->init_num < 4 */ 451 { 452 int skip_message; 453 454 do 455 { 456 while (s->init_num < 4) 457 { 458 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE, 459 &p[s->init_num],4 - s->init_num, 0); 460 if (i <= 0) 461 { 462 s->rwstate=SSL_READING; 463 *ok = 0; 464 return i; 465 } 466 s->init_num+=i; 467 } 468 469 skip_message = 0; 470 if (!s->server) 471 if (p[0] == SSL3_MT_HELLO_REQUEST) 472 /* The server may always send 'Hello Request' messages -- 473 * we are doing a handshake anyway now, so ignore them 474 * if their format is correct. Does not count for 475 * 'Finished' MAC. */ 476 if (p[1] == 0 && p[2] == 0 &&p[3] == 0) 477 { 478 s->init_num = 0; 479 skip_message = 1; 480 481 if (s->msg_callback) 482 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg); 483 } 484 } 485 while (skip_message); 486 487 /* s->init_num == 4 */ 488 489 if ((mt >= 0) && (*p != mt)) 490 { 491 al=SSL_AD_UNEXPECTED_MESSAGE; 492 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE); 493 goto f_err; 494 } 495 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) && 496 (st1 == SSL3_ST_SR_CERT_A) && 497 (stn == SSL3_ST_SR_CERT_B)) 498 { 499 /* At this point we have got an MS SGC second client 500 * hello (maybe we should always allow the client to 501 * start a new handshake?). We need to restart the mac. 502 * Don't increment {num,total}_renegotiations because 503 * we have not completed the handshake. */ 504 ssl3_init_finished_mac(s); 505 } 506 507 s->s3->tmp.message_type= *(p++); 508 509 n2l3(p,l); 510 if (l > (unsigned long)max) 511 { 512 al=SSL_AD_ILLEGAL_PARAMETER; 513 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE); 514 goto f_err; 515 } 516 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */ 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 && !BUF_MEM_grow_clean(s->init_buf,(int)l+4)) 523 { 524 SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB); 525 goto err; 526 } 527 s->s3->tmp.message_size=l; 528 s->state=stn; 529 530 s->init_msg = s->init_buf->data + 4; 531 s->init_num = 0; 532 } 533 534 /* next state (stn) */ 535 p = s->init_msg; 536 n = s->s3->tmp.message_size - s->init_num; 537 while (n > 0) 538 { 539 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0); 540 if (i <= 0) 541 { 542 s->rwstate=SSL_READING; 543 *ok = 0; 544 return i; 545 } 546 s->init_num += i; 547 n -= i; 548 } 549 550 #ifndef OPENSSL_NO_NEXTPROTONEG 551 /* If receiving Finished, record MAC of prior handshake messages for 552 * Finished verification. */ 553 if (*s->init_buf->data == SSL3_MT_FINISHED) 554 ssl3_take_mac(s); 555 #endif 556 557 /* Feed this message into MAC computation. */ 558 if (*(unsigned char*)s->init_buf->data != SSL3_MT_ENCRYPTED_EXTENSIONS) 559 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4); 560 if (s->msg_callback) 561 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg); 562 *ok=1; 563 return s->init_num; 564 f_err: 565 ssl3_send_alert(s,SSL3_AL_FATAL,al); 566 err: 567 *ok=0; 568 return(-1); 569 } 570 571 int ssl_cert_type(X509 *x, EVP_PKEY *pkey) 572 { 573 EVP_PKEY *pk; 574 int ret= -1,i; 575 576 if (pkey == NULL) 577 pk=X509_get_pubkey(x); 578 else 579 pk=pkey; 580 if (pk == NULL) goto err; 581 582 i=pk->type; 583 if (i == EVP_PKEY_RSA) 584 { 585 ret=SSL_PKEY_RSA_ENC; 586 } 587 else if (i == EVP_PKEY_DSA) 588 { 589 ret=SSL_PKEY_DSA_SIGN; 590 } 591 #ifndef OPENSSL_NO_EC 592 else if (i == EVP_PKEY_EC) 593 { 594 ret = SSL_PKEY_ECC; 595 } 596 #endif 597 else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc) 598 { 599 ret = SSL_PKEY_GOST94; 600 } 601 else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc) 602 { 603 ret = SSL_PKEY_GOST01; 604 } 605 err: 606 if(!pkey) EVP_PKEY_free(pk); 607 return(ret); 608 } 609 610 int ssl_verify_alarm_type(long type) 611 { 612 int al; 613 614 switch(type) 615 { 616 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: 617 case X509_V_ERR_UNABLE_TO_GET_CRL: 618 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: 619 al=SSL_AD_UNKNOWN_CA; 620 break; 621 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: 622 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: 623 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: 624 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: 625 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: 626 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: 627 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: 628 case X509_V_ERR_CERT_NOT_YET_VALID: 629 case X509_V_ERR_CRL_NOT_YET_VALID: 630 case X509_V_ERR_CERT_UNTRUSTED: 631 case X509_V_ERR_CERT_REJECTED: 632 al=SSL_AD_BAD_CERTIFICATE; 633 break; 634 case X509_V_ERR_CERT_SIGNATURE_FAILURE: 635 case X509_V_ERR_CRL_SIGNATURE_FAILURE: 636 al=SSL_AD_DECRYPT_ERROR; 637 break; 638 case X509_V_ERR_CERT_HAS_EXPIRED: 639 case X509_V_ERR_CRL_HAS_EXPIRED: 640 al=SSL_AD_CERTIFICATE_EXPIRED; 641 break; 642 case X509_V_ERR_CERT_REVOKED: 643 al=SSL_AD_CERTIFICATE_REVOKED; 644 break; 645 case X509_V_ERR_OUT_OF_MEM: 646 al=SSL_AD_INTERNAL_ERROR; 647 break; 648 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: 649 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: 650 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: 651 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: 652 case X509_V_ERR_CERT_CHAIN_TOO_LONG: 653 case X509_V_ERR_PATH_LENGTH_EXCEEDED: 654 case X509_V_ERR_INVALID_CA: 655 al=SSL_AD_UNKNOWN_CA; 656 break; 657 case X509_V_ERR_APPLICATION_VERIFICATION: 658 al=SSL_AD_HANDSHAKE_FAILURE; 659 break; 660 case X509_V_ERR_INVALID_PURPOSE: 661 al=SSL_AD_UNSUPPORTED_CERTIFICATE; 662 break; 663 default: 664 al=SSL_AD_CERTIFICATE_UNKNOWN; 665 break; 666 } 667 return(al); 668 } 669 670 #ifndef OPENSSL_NO_BUF_FREELISTS 671 /* On some platforms, malloc() performance is bad enough that you can't just 672 * free() and malloc() buffers all the time, so we need to use freelists from 673 * unused buffers. Currently, each freelist holds memory chunks of only a 674 * given size (list->chunklen); other sized chunks are freed and malloced. 675 * This doesn't help much if you're using many different SSL option settings 676 * with a given context. (The options affecting buffer size are 677 * max_send_fragment, read buffer vs write buffer, 678 * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and 679 * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.) Using a separate freelist for every 680 * possible size is not an option, since max_send_fragment can take on many 681 * different values. 682 * 683 * If you are on a platform with a slow malloc(), and you're using SSL 684 * connections with many different settings for these options, and you need to 685 * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options: 686 * - Link against a faster malloc implementation. 687 * - Use a separate SSL_CTX for each option set. 688 * - Improve this code. 689 */ 690 static void * 691 freelist_extract(SSL_CTX *ctx, int for_read, int sz) 692 { 693 SSL3_BUF_FREELIST *list; 694 SSL3_BUF_FREELIST_ENTRY *ent = NULL; 695 void *result = NULL; 696 697 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 698 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist; 699 if (list != NULL && sz == (int)list->chunklen) 700 ent = list->head; 701 if (ent != NULL) 702 { 703 list->head = ent->next; 704 result = ent; 705 if (--list->len == 0) 706 list->chunklen = 0; 707 } 708 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 709 if (!result) 710 result = OPENSSL_malloc(sz); 711 return result; 712 } 713 714 static void 715 freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem) 716 { 717 SSL3_BUF_FREELIST *list; 718 SSL3_BUF_FREELIST_ENTRY *ent; 719 720 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 721 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist; 722 if (list != NULL && 723 (sz == list->chunklen || list->chunklen == 0) && 724 list->len < ctx->freelist_max_len && 725 sz >= sizeof(*ent)) 726 { 727 list->chunklen = sz; 728 ent = mem; 729 ent->next = list->head; 730 list->head = ent; 731 ++list->len; 732 mem = NULL; 733 } 734 735 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 736 if (mem) 737 OPENSSL_free(mem); 738 } 739 #else 740 #define freelist_extract(c,fr,sz) OPENSSL_malloc(sz) 741 #define freelist_insert(c,fr,sz,m) OPENSSL_free(m) 742 #endif 743 744 int ssl3_setup_read_buffer(SSL *s) 745 { 746 unsigned char *p; 747 size_t len,align=0,headerlen; 748 749 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 750 headerlen = DTLS1_RT_HEADER_LENGTH; 751 else 752 headerlen = SSL3_RT_HEADER_LENGTH; 753 754 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 755 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1); 756 #endif 757 758 if (s->s3->rbuf.buf == NULL) 759 { 760 len = SSL3_RT_MAX_PLAIN_LENGTH 761 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD 762 + headerlen + align; 763 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) 764 { 765 s->s3->init_extra = 1; 766 len += SSL3_RT_MAX_EXTRA; 767 } 768 #ifndef OPENSSL_NO_COMP 769 if (!(s->options & SSL_OP_NO_COMPRESSION)) 770 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD; 771 #endif 772 if ((p=freelist_extract(s->ctx, 1, len)) == NULL) 773 goto err; 774 s->s3->rbuf.buf = p; 775 s->s3->rbuf.len = len; 776 } 777 778 s->packet= &(s->s3->rbuf.buf[0]); 779 return 1; 780 781 err: 782 SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER,ERR_R_MALLOC_FAILURE); 783 return 0; 784 } 785 786 int ssl3_setup_write_buffer(SSL *s) 787 { 788 unsigned char *p; 789 size_t len,align=0,headerlen; 790 791 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 792 headerlen = DTLS1_RT_HEADER_LENGTH + 1; 793 else 794 headerlen = SSL3_RT_HEADER_LENGTH; 795 796 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 797 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1); 798 #endif 799 800 if (s->s3->wbuf.buf == NULL) 801 { 802 len = s->max_send_fragment 803 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD 804 + headerlen + align; 805 #ifndef OPENSSL_NO_COMP 806 if (!(s->options & SSL_OP_NO_COMPRESSION)) 807 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD; 808 #endif 809 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) 810 len += headerlen + align 811 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD; 812 813 if ((p=freelist_extract(s->ctx, 0, len)) == NULL) 814 goto err; 815 s->s3->wbuf.buf = p; 816 s->s3->wbuf.len = len; 817 } 818 819 return 1; 820 821 err: 822 SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER,ERR_R_MALLOC_FAILURE); 823 return 0; 824 } 825 826 827 int ssl3_setup_buffers(SSL *s) 828 { 829 if (!ssl3_setup_read_buffer(s)) 830 return 0; 831 if (!ssl3_setup_write_buffer(s)) 832 return 0; 833 return 1; 834 } 835 836 int ssl3_release_write_buffer(SSL *s) 837 { 838 if (s->s3->wbuf.buf != NULL) 839 { 840 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf); 841 s->s3->wbuf.buf = NULL; 842 } 843 return 1; 844 } 845 846 int ssl3_release_read_buffer(SSL *s) 847 { 848 if (s->s3->rbuf.buf != NULL) 849 { 850 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf); 851 s->s3->rbuf.buf = NULL; 852 } 853 return 1; 854 } 855 856
