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 &(s->s3->finish_dgst1), 164 &(s->s3->finish_dgst2), 165 sender,slen,s->s3->tmp.finish_md); 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#ifdef OPENSSL_SYS_WIN16 172 /* MSVC 1.5 does not clear the top bytes of the word unless 173 * I do this. 174 */ 175 l&=0xffff; 176#endif 177 178 *(d++)=SSL3_MT_FINISHED; 179 l2n3(l,d); 180 s->init_num=(int)l+4; 181 s->init_off=0; 182 183 s->state=b; 184 } 185 186 /* SSL3_ST_SEND_xxxxxx_HELLO_B */ 187 return(ssl3_do_write(s,SSL3_RT_HANDSHAKE)); 188 } 189 190int ssl3_get_finished(SSL *s, int a, int b) 191 { 192 int al,i,ok; 193 long n; 194 unsigned char *p; 195 196 /* the mac has already been generated when we received the 197 * change cipher spec message and is in s->s3->tmp.peer_finish_md 198 */ 199 200 n=s->method->ssl_get_message(s, 201 a, 202 b, 203 SSL3_MT_FINISHED, 204 64, /* should actually be 36+4 :-) */ 205 &ok); 206 207 if (!ok) return((int)n); 208 209 /* If this occurs, we have missed a message */ 210 if (!s->s3->change_cipher_spec) 211 { 212 al=SSL_AD_UNEXPECTED_MESSAGE; 213 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS); 214 goto f_err; 215 } 216 s->s3->change_cipher_spec=0; 217 218 p = (unsigned char *)s->init_msg; 219 i = s->s3->tmp.peer_finish_md_len; 220 221 if (i != n) 222 { 223 al=SSL_AD_DECODE_ERROR; 224 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH); 225 goto f_err; 226 } 227 228 if (memcmp(p, s->s3->tmp.peer_finish_md, i) != 0) 229 { 230 al=SSL_AD_DECRYPT_ERROR; 231 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED); 232 goto f_err; 233 } 234 235 return(1); 236f_err: 237 ssl3_send_alert(s,SSL3_AL_FATAL,al); 238 return(0); 239 } 240 241/* for these 2 messages, we need to 242 * ssl->enc_read_ctx re-init 243 * ssl->s3->read_sequence zero 244 * ssl->s3->read_mac_secret re-init 245 * ssl->session->read_sym_enc assign 246 * ssl->session->read_compression assign 247 * ssl->session->read_hash assign 248 */ 249int ssl3_send_change_cipher_spec(SSL *s, int a, int b) 250 { 251 unsigned char *p; 252 253 if (s->state == a) 254 { 255 p=(unsigned char *)s->init_buf->data; 256 *p=SSL3_MT_CCS; 257 s->init_num=1; 258 s->init_off=0; 259 260 s->state=b; 261 } 262 263 /* SSL3_ST_CW_CHANGE_B */ 264 return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC)); 265 } 266 267unsigned long ssl3_output_cert_chain(SSL *s, X509 *x) 268 { 269 unsigned char *p; 270 int n,i; 271 unsigned long l=7; 272 BUF_MEM *buf; 273 X509_STORE_CTX xs_ctx; 274 X509_OBJECT obj; 275 276 int no_chain; 277 278 if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs) 279 no_chain = 1; 280 else 281 no_chain = 0; 282 283 /* TLSv1 sends a chain with nothing in it, instead of an alert */ 284 buf=s->init_buf; 285 if (!BUF_MEM_grow_clean(buf,10)) 286 { 287 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB); 288 return(0); 289 } 290 if (x != NULL) 291 { 292 if(!no_chain && !X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,NULL,NULL)) 293 { 294 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB); 295 return(0); 296 } 297 298 for (;;) 299 { 300 n=i2d_X509(x,NULL); 301 if (!BUF_MEM_grow_clean(buf,(int)(n+l+3))) 302 { 303 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB); 304 return(0); 305 } 306 p=(unsigned char *)&(buf->data[l]); 307 l2n3(n,p); 308 i2d_X509(x,&p); 309 l+=n+3; 310 311 if (no_chain) 312 break; 313 314 if (X509_NAME_cmp(X509_get_subject_name(x), 315 X509_get_issuer_name(x)) == 0) break; 316 317 i=X509_STORE_get_by_subject(&xs_ctx,X509_LU_X509, 318 X509_get_issuer_name(x),&obj); 319 if (i <= 0) break; 320 x=obj.data.x509; 321 /* Count is one too high since the X509_STORE_get uped the 322 * ref count */ 323 X509_free(x); 324 } 325 if (!no_chain) 326 X509_STORE_CTX_cleanup(&xs_ctx); 327 } 328 329 /* Thawte special :-) */ 330 if (s->ctx->extra_certs != NULL) 331 for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++) 332 { 333 x=sk_X509_value(s->ctx->extra_certs,i); 334 n=i2d_X509(x,NULL); 335 if (!BUF_MEM_grow_clean(buf,(int)(n+l+3))) 336 { 337 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB); 338 return(0); 339 } 340 p=(unsigned char *)&(buf->data[l]); 341 l2n3(n,p); 342 i2d_X509(x,&p); 343 l+=n+3; 344 } 345 346 l-=7; 347 p=(unsigned char *)&(buf->data[4]); 348 l2n3(l,p); 349 l+=3; 350 p=(unsigned char *)&(buf->data[0]); 351 *(p++)=SSL3_MT_CERTIFICATE; 352 l2n3(l,p); 353 l+=4; 354 return(l); 355 } 356 357/* Obtain handshake message of message type 'mt' (any if mt == -1), 358 * maximum acceptable body length 'max'. 359 * The first four bytes (msg_type and length) are read in state 'st1', 360 * the body is read in state 'stn'. 361 */ 362long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok) 363 { 364 unsigned char *p; 365 unsigned long l; 366 long n; 367 int i,al; 368 369 if (s->s3->tmp.reuse_message) 370 { 371 s->s3->tmp.reuse_message=0; 372 if ((mt >= 0) && (s->s3->tmp.message_type != mt)) 373 { 374 al=SSL_AD_UNEXPECTED_MESSAGE; 375 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE); 376 goto f_err; 377 } 378 *ok=1; 379 s->init_msg = s->init_buf->data + 4; 380 s->init_num = (int)s->s3->tmp.message_size; 381 return s->init_num; 382 } 383 384 p=(unsigned char *)s->init_buf->data; 385 386 if (s->state == st1) /* s->init_num < 4 */ 387 { 388 int skip_message; 389 390 do 391 { 392 while (s->init_num < 4) 393 { 394 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE, 395 &p[s->init_num],4 - s->init_num, 0); 396 if (i <= 0) 397 { 398 s->rwstate=SSL_READING; 399 *ok = 0; 400 return i; 401 } 402 s->init_num+=i; 403 } 404 405 skip_message = 0; 406 if (!s->server) 407 if (p[0] == SSL3_MT_HELLO_REQUEST) 408 /* The server may always send 'Hello Request' messages -- 409 * we are doing a handshake anyway now, so ignore them 410 * if their format is correct. Does not count for 411 * 'Finished' MAC. */ 412 if (p[1] == 0 && p[2] == 0 &&p[3] == 0) 413 { 414 s->init_num = 0; 415 skip_message = 1; 416 417 if (s->msg_callback) 418 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg); 419 } 420 } 421 while (skip_message); 422 423 /* s->init_num == 4 */ 424 425 if ((mt >= 0) && (*p != mt)) 426 { 427 al=SSL_AD_UNEXPECTED_MESSAGE; 428 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE); 429 goto f_err; 430 } 431 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) && 432 (st1 == SSL3_ST_SR_CERT_A) && 433 (stn == SSL3_ST_SR_CERT_B)) 434 { 435 /* At this point we have got an MS SGC second client 436 * hello (maybe we should always allow the client to 437 * start a new handshake?). We need to restart the mac. 438 * Don't increment {num,total}_renegotiations because 439 * we have not completed the handshake. */ 440 ssl3_init_finished_mac(s); 441 } 442 443 s->s3->tmp.message_type= *(p++); 444 445 n2l3(p,l); 446 if (l > (unsigned long)max) 447 { 448 al=SSL_AD_ILLEGAL_PARAMETER; 449 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE); 450 goto f_err; 451 } 452 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */ 453 { 454 al=SSL_AD_ILLEGAL_PARAMETER; 455 SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE); 456 goto f_err; 457 } 458 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4)) 459 { 460 SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB); 461 goto err; 462 } 463 s->s3->tmp.message_size=l; 464 s->state=stn; 465 466 s->init_msg = s->init_buf->data + 4; 467 s->init_num = 0; 468 } 469 470 /* next state (stn) */ 471 p = s->init_msg; 472 n = s->s3->tmp.message_size - s->init_num; 473 while (n > 0) 474 { 475 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0); 476 if (i <= 0) 477 { 478 s->rwstate=SSL_READING; 479 *ok = 0; 480 return i; 481 } 482 s->init_num += i; 483 n -= i; 484 } 485 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4); 486 if (s->msg_callback) 487 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg); 488 *ok=1; 489 return s->init_num; 490f_err: 491 ssl3_send_alert(s,SSL3_AL_FATAL,al); 492err: 493 *ok=0; 494 return(-1); 495 } 496 497int ssl_cert_type(X509 *x, EVP_PKEY *pkey) 498 { 499 EVP_PKEY *pk; 500 int ret= -1,i; 501 502 if (pkey == NULL) 503 pk=X509_get_pubkey(x); 504 else 505 pk=pkey; 506 if (pk == NULL) goto err; 507 508 i=pk->type; 509 if (i == EVP_PKEY_RSA) 510 { 511 ret=SSL_PKEY_RSA_ENC; 512 } 513 else if (i == EVP_PKEY_DSA) 514 { 515 ret=SSL_PKEY_DSA_SIGN; 516 } 517#ifndef OPENSSL_NO_EC 518 else if (i == EVP_PKEY_EC) 519 { 520 ret = SSL_PKEY_ECC; 521 } 522#endif 523 524err: 525 if(!pkey) EVP_PKEY_free(pk); 526 return(ret); 527 } 528 529int ssl_verify_alarm_type(long type) 530 { 531 int al; 532 533 switch(type) 534 { 535 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: 536 case X509_V_ERR_UNABLE_TO_GET_CRL: 537 case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER: 538 al=SSL_AD_UNKNOWN_CA; 539 break; 540 case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: 541 case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: 542 case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: 543 case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: 544 case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: 545 case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: 546 case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: 547 case X509_V_ERR_CERT_NOT_YET_VALID: 548 case X509_V_ERR_CRL_NOT_YET_VALID: 549 case X509_V_ERR_CERT_UNTRUSTED: 550 case X509_V_ERR_CERT_REJECTED: 551 al=SSL_AD_BAD_CERTIFICATE; 552 break; 553 case X509_V_ERR_CERT_SIGNATURE_FAILURE: 554 case X509_V_ERR_CRL_SIGNATURE_FAILURE: 555 al=SSL_AD_DECRYPT_ERROR; 556 break; 557 case X509_V_ERR_CERT_HAS_EXPIRED: 558 case X509_V_ERR_CRL_HAS_EXPIRED: 559 al=SSL_AD_CERTIFICATE_EXPIRED; 560 break; 561 case X509_V_ERR_CERT_REVOKED: 562 al=SSL_AD_CERTIFICATE_REVOKED; 563 break; 564 case X509_V_ERR_OUT_OF_MEM: 565 al=SSL_AD_INTERNAL_ERROR; 566 break; 567 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: 568 case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: 569 case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: 570 case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: 571 case X509_V_ERR_CERT_CHAIN_TOO_LONG: 572 case X509_V_ERR_PATH_LENGTH_EXCEEDED: 573 case X509_V_ERR_INVALID_CA: 574 al=SSL_AD_UNKNOWN_CA; 575 break; 576 case X509_V_ERR_APPLICATION_VERIFICATION: 577 al=SSL_AD_HANDSHAKE_FAILURE; 578 break; 579 case X509_V_ERR_INVALID_PURPOSE: 580 al=SSL_AD_UNSUPPORTED_CERTIFICATE; 581 break; 582 default: 583 al=SSL_AD_CERTIFICATE_UNKNOWN; 584 break; 585 } 586 return(al); 587 } 588 589int ssl3_setup_buffers(SSL *s) 590 { 591 unsigned char *p; 592 unsigned int extra; 593 size_t len; 594 595 if (s->s3->rbuf.buf == NULL) 596 { 597 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER) 598 extra=SSL3_RT_MAX_EXTRA; 599 else 600 extra=0; 601 len = SSL3_RT_MAX_PACKET_SIZE + extra; 602 if ((p=OPENSSL_malloc(len)) == NULL) 603 goto err; 604 s->s3->rbuf.buf = p; 605 s->s3->rbuf.len = len; 606 } 607 608 if (s->s3->wbuf.buf == NULL) 609 { 610 len = SSL3_RT_MAX_PACKET_SIZE; 611 len += SSL3_RT_HEADER_LENGTH + 256; /* extra space for empty fragment */ 612 if ((p=OPENSSL_malloc(len)) == NULL) 613 goto err; 614 s->s3->wbuf.buf = p; 615 s->s3->wbuf.len = len; 616 } 617 s->packet= &(s->s3->rbuf.buf[0]); 618 return(1); 619err: 620 SSLerr(SSL_F_SSL3_SETUP_BUFFERS,ERR_R_MALLOC_FAILURE); 621 return(0); 622 } 623