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 int ssl3_get_finished(SSL *s, int a, int b) 206 { 207 int al,i,ok; 208 long n; 209 unsigned char *p; 210 211 /* the mac has already been generated when we received the 212 * change cipher spec message and is in s->s3->tmp.peer_finish_md 213 */ 214 215 n=s->method->ssl_get_message(s, 216 a, 217 b, 218 SSL3_MT_FINISHED, 219 64, /* should actually be 36+4 :-) */ 220 &ok); 221 222 if (!ok) return((int)n); 223 224 /* If this occurs, we have missed a message */ 225 if (!s->s3->change_cipher_spec) 226 { 227 al=SSL_AD_UNEXPECTED_MESSAGE; 228 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS); 229 goto f_err; 230 } 231 s->s3->change_cipher_spec=0; 232 233 p = (unsigned char *)s->init_msg; 234 i = s->s3->tmp.peer_finish_md_len; 235 236 if (i != n) 237 { 238 al=SSL_AD_DECODE_ERROR; 239 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH); 240 goto f_err; 241 } 242 243 if (memcmp(p, s->s3->tmp.peer_finish_md, i) != 0) 244 { 245 al=SSL_AD_DECRYPT_ERROR; 246 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED); 247 goto f_err; 248 } 249 250 /* Copy the finished so we can use it for 251 renegotiation checks */ 252 if(s->type == SSL_ST_ACCEPT) 253 { 254 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 255 memcpy(s->s3->previous_client_finished, 256 s->s3->tmp.peer_finish_md, i); 257 s->s3->previous_client_finished_len=i; 258 } 259 else 260 { 261 OPENSSL_assert(i <= EVP_MAX_MD_SIZE); 262 memcpy(s->s3->previous_server_finished, 263 s->s3->tmp.peer_finish_md, i); 264 s->s3->previous_server_finished_len=i; 265 } 266 267 return(1); 268 f_err: 269 ssl3_send_alert(s,SSL3_AL_FATAL,al); 270 return(0); 271 } 272 273 /* for these 2 messages, we need to 274 * ssl->enc_read_ctx re-init 275 * ssl->s3->read_sequence zero 276 * ssl->s3->read_mac_secret re-init 277 * ssl->session->read_sym_enc assign 278 * ssl->session->read_compression assign 279 * ssl->session->read_hash assign 280 */ 281 int ssl3_send_change_cipher_spec(SSL *s, int a, int b) 282 { 283 unsigned char *p; 284 285 if (s->state == a) 286 { 287 p=(unsigned char *)s->init_buf->data; 288 *p=SSL3_MT_CCS; 289 s->init_num=1; 290 s->init_off=0; 291 292 s->state=b; 293 } 294 295 /* SSL3_ST_CW_CHANGE_B */ 296 return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC)); 297 } 298 299 static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x) 300 { 301 int n; 302 unsigned char *p; 303 304 n=i2d_X509(x,NULL); 305 if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3))) 306 { 307 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF,ERR_R_BUF_LIB); 308 return(-1); 309 } 310 p=(unsigned char *)&(buf->data[*l]); 311 l2n3(n,p); 312 i2d_X509(x,&p); 313 *l+=n+3; 314 315 return(0); 316 } 317 318 unsigned long ssl3_output_cert_chain(SSL *s, X509 *x) 319 { 320 unsigned char *p; 321 int i; 322 unsigned long l=7; 323 BUF_MEM *buf; 324 int no_chain; 325 STACK_OF(X509) *cert_chain; 326 327 cert_chain = SSL_get_certificate_chain(s, x); 328 329 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs || cert_chain) 330 no_chain = 1; 331 else 332 no_chain = 0; 333 334 /* TLSv1 sends a chain with nothing in it, instead of an alert */ 335 buf=s->init_buf; 336 if (!BUF_MEM_grow_clean(buf,10)) 337 { 338 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB); 339 return(0); 340 } 341 if (x != NULL) 342 { 343 if (no_chain) 344 { 345 if (ssl3_add_cert_to_buf(buf, &l, x)) 346 return(0); 347 } 348 else 349 { 350 X509_STORE_CTX xs_ctx; 351 352 if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL)) 353 { 354 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB); 355 return(0); 356 } 357 X509_verify_cert(&xs_ctx); 358 /* Don't leave errors in the queue */ 359 ERR_clear_error(); 360 for (i=0; i < sk_X509_num(xs_ctx.chain); i++) 361 { 362 x = sk_X509_value(xs_ctx.chain, i); 363 364 if (ssl3_add_cert_to_buf(buf, &l, x)) 365 { 366 X509_STORE_CTX_cleanup(&xs_ctx); 367 return 0; 368 } 369 } 370 X509_STORE_CTX_cleanup(&xs_ctx); 371 } 372 } 373 /* Thawte special :-) */ 374 for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++) 375 { 376 x=sk_X509_value(s->ctx->extra_certs,i); 377 if (ssl3_add_cert_to_buf(buf, &l, x)) 378 return(0); 379 } 380 381 for (i=0; i<sk_X509_num(cert_chain); i++) 382 if (ssl3_add_cert_to_buf(buf, &l, sk_X509_value(cert_chain,i))) 383 return(0); 384 385 l-=7; 386 p=(unsigned char *)&(buf->data[4]); 387 l2n3(l,p); 388 l+=3; 389 p=(unsigned char *)&(buf->data[0]); 390 *(p++)=SSL3_MT_CERTIFICATE; 391 l2n3(l,p); 392 l+=4; 393 return(l); 394 } 395 396 /* Obtain handshake message of message type 'mt' (any if mt == -1), 397 * maximum acceptable body length 'max'. 398 * The first four bytes (msg_type and length) are read in state 'st1', 399 * the body is read in state 'stn'. 400 */ 401 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok) 402 { 403 unsigned char *p; 404 unsigned long l; 405 long n; 406 int i,al; 407 408 if (s->s3->tmp.reuse_message) 409 { 410 s->s3->tmp.reuse_message=0; 411 if ((mt >= 0) && (s->s3->tmp.message_type != mt)) 412 { 413 al=SSL_AD_UNEXPECTED_MESSAGE; 414 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE); 415 goto f_err; 416 } 417 *ok=1; 418 s->init_msg = s->init_buf->data + 4; 419 s->init_num = (int)s->s3->tmp.message_size; 420 return s->init_num; 421 } 422 423 p=(unsigned char *)s->init_buf->data; 424 425 if (s->state == st1) /* s->init_num < 4 */ 426 { 427 int skip_message; 428 429 do 430 { 431 while (s->init_num < 4) 432 { 433 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE, 434 &p[s->init_num],4 - s->init_num, 0); 435 if (i <= 0) 436 { 437 s->rwstate=SSL_READING; 438 *ok = 0; 439 return i; 440 } 441 s->init_num+=i; 442 } 443 444 skip_message = 0; 445 if (!s->server) 446 if (p[0] == SSL3_MT_HELLO_REQUEST) 447 /* The server may always send 'Hello Request' messages -- 448 * we are doing a handshake anyway now, so ignore them 449 * if their format is correct. Does not count for 450 * 'Finished' MAC. */ 451 if (p[1] == 0 && p[2] == 0 &&p[3] == 0) 452 { 453 s->init_num = 0; 454 skip_message = 1; 455 456 if (s->msg_callback) 457 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg); 458 } 459 } 460 while (skip_message); 461 462 /* s->init_num == 4 */ 463 464 if ((mt >= 0) && (*p != mt)) 465 { 466 al=SSL_AD_UNEXPECTED_MESSAGE; 467 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE); 468 goto f_err; 469 } 470 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) && 471 (st1 == SSL3_ST_SR_CERT_A) && 472 (stn == SSL3_ST_SR_CERT_B)) 473 { 474 /* At this point we have got an MS SGC second client 475 * hello (maybe we should always allow the client to 476 * start a new handshake?). We need to restart the mac. 477 * Don't increment {num,total}_renegotiations because 478 * we have not completed the handshake. */ 479 ssl3_init_finished_mac(s); 480 } 481 482 s->s3->tmp.message_type= *(p++); 483 484 n2l3(p,l); 485 if (l > (unsigned long)max) 486 { 487 al=SSL_AD_ILLEGAL_PARAMETER; 488 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE); 489 goto f_err; 490 } 491 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */ 492 { 493 al=SSL_AD_ILLEGAL_PARAMETER; 494 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE); 495 goto f_err; 496 } 497 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4)) 498 { 499 SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB); 500 goto err; 501 } 502 s->s3->tmp.message_size=l; 503 s->state=stn; 504 505 s->init_msg = s->init_buf->data + 4; 506 s->init_num = 0; 507 } 508 509 /* next state (stn) */ 510 p = s->init_msg; 511 n = s->s3->tmp.message_size - s->init_num; 512 while (n > 0) 513 { 514 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0); 515 if (i <= 0) 516 { 517 s->rwstate=SSL_READING; 518 *ok = 0; 519 return i; 520 } 521 s->init_num += i; 522 n -= i; 523 } 524 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4); 525 if (s->msg_callback) 526 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg); 527 *ok=1; 528 return s->init_num; 529 f_err: 530 ssl3_send_alert(s,SSL3_AL_FATAL,al); 531 err: 532 *ok=0; 533 return(-1); 534 } 535 536 int ssl_cert_type(X509 *x, EVP_PKEY *pkey) 537 { 538 EVP_PKEY *pk; 539 int ret= -1,i; 540 541 if (pkey == NULL) 542 pk=X509_get_pubkey(x); 543 else 544 pk=pkey; 545 if (pk == NULL) goto err; 546 547 i=pk->type; 548 if (i == EVP_PKEY_RSA) 549 { 550 ret=SSL_PKEY_RSA_ENC; 551 } 552 else if (i == EVP_PKEY_DSA) 553 { 554 ret=SSL_PKEY_DSA_SIGN; 555 } 556 #ifndef OPENSSL_NO_EC 557 else if (i == EVP_PKEY_EC) 558 { 559 ret = SSL_PKEY_ECC; 560 } 561 #endif 562 else if (i == NID_id_GostR3410_94 || i == NID_id_GostR3410_94_cc) 563 { 564 ret = SSL_PKEY_GOST94; 565 } 566 else if (i == NID_id_GostR3410_2001 || i == NID_id_GostR3410_2001_cc) 567 { 568 ret = SSL_PKEY_GOST01; 569 } 570 err: 571 if(!pkey) EVP_PKEY_free(pk); 572 return(ret); 573 } 574 575 int ssl_verify_alarm_type(long type) 576 { 577 int al; 578 579 switch(type) 580 { 581 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: 582 case X509_V_ERR_UNABLE_TO_GET_CRL: 583 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: 584 al=SSL_AD_UNKNOWN_CA; 585 break; 586 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: 587 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: 588 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: 589 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: 590 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: 591 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: 592 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: 593 case X509_V_ERR_CERT_NOT_YET_VALID: 594 case X509_V_ERR_CRL_NOT_YET_VALID: 595 case X509_V_ERR_CERT_UNTRUSTED: 596 case X509_V_ERR_CERT_REJECTED: 597 al=SSL_AD_BAD_CERTIFICATE; 598 break; 599 case X509_V_ERR_CERT_SIGNATURE_FAILURE: 600 case X509_V_ERR_CRL_SIGNATURE_FAILURE: 601 al=SSL_AD_DECRYPT_ERROR; 602 break; 603 case X509_V_ERR_CERT_HAS_EXPIRED: 604 case X509_V_ERR_CRL_HAS_EXPIRED: 605 al=SSL_AD_CERTIFICATE_EXPIRED; 606 break; 607 case X509_V_ERR_CERT_REVOKED: 608 al=SSL_AD_CERTIFICATE_REVOKED; 609 break; 610 case X509_V_ERR_OUT_OF_MEM: 611 al=SSL_AD_INTERNAL_ERROR; 612 break; 613 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: 614 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: 615 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: 616 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: 617 case X509_V_ERR_CERT_CHAIN_TOO_LONG: 618 case X509_V_ERR_PATH_LENGTH_EXCEEDED: 619 case X509_V_ERR_INVALID_CA: 620 al=SSL_AD_UNKNOWN_CA; 621 break; 622 case X509_V_ERR_APPLICATION_VERIFICATION: 623 al=SSL_AD_HANDSHAKE_FAILURE; 624 break; 625 case X509_V_ERR_INVALID_PURPOSE: 626 al=SSL_AD_UNSUPPORTED_CERTIFICATE; 627 break; 628 default: 629 al=SSL_AD_CERTIFICATE_UNKNOWN; 630 break; 631 } 632 return(al); 633 } 634 635 #ifndef OPENSSL_NO_BUF_FREELISTS 636 /* On some platforms, malloc() performance is bad enough that you can't just 637 * free() and malloc() buffers all the time, so we need to use freelists from 638 * unused buffers. Currently, each freelist holds memory chunks of only a 639 * given size (list->chunklen); other sized chunks are freed and malloced. 640 * This doesn't help much if you're using many different SSL option settings 641 * with a given context. (The options affecting buffer size are 642 * max_send_fragment, read buffer vs write buffer, 643 * SSL_OP_MICROSOFT_BIG_WRITE_BUFFER, SSL_OP_NO_COMPRESSION, and 644 * SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS.) Using a separate freelist for every 645 * possible size is not an option, since max_send_fragment can take on many 646 * different values. 647 * 648 * If you are on a platform with a slow malloc(), and you're using SSL 649 * connections with many different settings for these options, and you need to 650 * use the SSL_MOD_RELEASE_BUFFERS feature, you have a few options: 651 * - Link against a faster malloc implementation. 652 * - Use a separate SSL_CTX for each option set. 653 * - Improve this code. 654 */ 655 static void * 656 freelist_extract(SSL_CTX *ctx, int for_read, int sz) 657 { 658 SSL3_BUF_FREELIST *list; 659 SSL3_BUF_FREELIST_ENTRY *ent = NULL; 660 void *result = NULL; 661 662 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 663 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist; 664 if (list != NULL && sz == (int)list->chunklen) 665 ent = list->head; 666 if (ent != NULL) 667 { 668 list->head = ent->next; 669 result = ent; 670 if (--list->len == 0) 671 list->chunklen = 0; 672 } 673 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 674 if (!result) 675 result = OPENSSL_malloc(sz); 676 return result; 677 } 678 679 static void 680 freelist_insert(SSL_CTX *ctx, int for_read, size_t sz, void *mem) 681 { 682 SSL3_BUF_FREELIST *list; 683 SSL3_BUF_FREELIST_ENTRY *ent; 684 685 CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); 686 list = for_read ? ctx->rbuf_freelist : ctx->wbuf_freelist; 687 if (list != NULL && 688 (sz == list->chunklen || list->chunklen == 0) && 689 list->len < ctx->freelist_max_len && 690 sz >= sizeof(*ent)) 691 { 692 list->chunklen = sz; 693 ent = mem; 694 ent->next = list->head; 695 list->head = ent; 696 ++list->len; 697 mem = NULL; 698 } 699 700 CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); 701 if (mem) 702 OPENSSL_free(mem); 703 } 704 #else 705 #define freelist_extract(c,fr,sz) OPENSSL_malloc(sz) 706 #define freelist_insert(c,fr,sz,m) OPENSSL_free(m) 707 #endif 708 709 int ssl3_setup_read_buffer(SSL *s) 710 { 711 unsigned char *p; 712 size_t len,align=0,headerlen; 713 714 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 715 headerlen = DTLS1_RT_HEADER_LENGTH; 716 else 717 headerlen = SSL3_RT_HEADER_LENGTH; 718 719 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 720 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1); 721 #endif 722 723 if (s->s3->rbuf.buf == NULL) 724 { 725 if (SSL_get_mode(s) & SSL_MODE_SMALL_BUFFERS) 726 { 727 len = SSL3_RT_DEFAULT_PACKET_SIZE; 728 } 729 else 730 { 731 len = SSL3_RT_MAX_PLAIN_LENGTH 732 + SSL3_RT_MAX_ENCRYPTED_OVERHEAD 733 + headerlen + align; 734 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) 735 { 736 s->s3->init_extra = 1; 737 len += SSL3_RT_MAX_EXTRA; 738 } 739 } 740 #ifndef OPENSSL_NO_COMP 741 if (!(s->options & SSL_OP_NO_COMPRESSION)) 742 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD; 743 #endif 744 if ((p=freelist_extract(s->ctx, 1, len)) == NULL) 745 goto err; 746 s->s3->rbuf.buf = p; 747 s->s3->rbuf.len = len; 748 } 749 750 s->packet= &(s->s3->rbuf.buf[0]); 751 return 1; 752 753 err: 754 SSLerr(SSL_F_SSL3_SETUP_READ_BUFFER,ERR_R_MALLOC_FAILURE); 755 return 0; 756 } 757 758 int ssl3_setup_write_buffer(SSL *s) 759 { 760 unsigned char *p; 761 size_t len,align=0,headerlen; 762 763 if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER) 764 headerlen = DTLS1_RT_HEADER_LENGTH + 1; 765 else 766 headerlen = SSL3_RT_HEADER_LENGTH; 767 768 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0 769 align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1); 770 #endif 771 772 if (s->s3->wbuf.buf == NULL) 773 { 774 if (SSL_get_mode(s) & SSL_MODE_SMALL_BUFFERS) 775 { 776 len = SSL3_RT_DEFAULT_PACKET_SIZE; 777 } 778 else 779 { 780 len = s->max_send_fragment; 781 } 782 len += 0 783 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD 784 + headerlen + align; 785 #ifndef OPENSSL_NO_COMP 786 if (!(s->options & SSL_OP_NO_COMPRESSION)) 787 len += SSL3_RT_MAX_COMPRESSED_OVERHEAD; 788 #endif 789 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS)) 790 len += headerlen + align 791 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD; 792 if ((p=freelist_extract(s->ctx, 0, len)) == NULL) 793 goto err; 794 s->s3->wbuf.buf = p; 795 s->s3->wbuf.len = len; 796 } 797 798 return 1; 799 800 err: 801 SSLerr(SSL_F_SSL3_SETUP_WRITE_BUFFER,ERR_R_MALLOC_FAILURE); 802 return 0; 803 } 804 805 806 int ssl3_setup_buffers(SSL *s) 807 { 808 if (!ssl3_setup_read_buffer(s)) 809 return 0; 810 if (!ssl3_setup_write_buffer(s)) 811 return 0; 812 return 1; 813 } 814 815 int ssl3_release_write_buffer(SSL *s) 816 { 817 if (s->s3->wbuf.buf != NULL) 818 { 819 freelist_insert(s->ctx, 0, s->s3->wbuf.len, s->s3->wbuf.buf); 820 s->s3->wbuf.buf = NULL; 821 } 822 return 1; 823 } 824 825 int ssl3_release_read_buffer(SSL *s) 826 { 827 if (s->s3->rbuf.buf != NULL) 828 { 829 freelist_insert(s->ctx, 1, s->s3->rbuf.len, s->s3->rbuf.buf); 830 s->s3->rbuf.buf = NULL; 831 } 832 return 1; 833 } 834
