ssl/s3_both.c

   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) */
 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                         &(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
 190 int 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);
 236 f_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  */
 249 int 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
 267 static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
 268         {
 269                 int n;
 270                 unsigned char *p;
 271
 272                 n=i2d_X509(x,NULL);
 273                 if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
 274                         {
 275                                 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
 276                                 return(-1);
 277                         }
 278                 p=(unsigned char *)&(buf->data[*l]);
 279                 l2n3(n,p);
 280                 i2d_X509(x,&p);
 281                 *l+=n+3;
 282
 283                 return(0);
 284         }
 285
 286 unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
 287         {
 288         unsigned char *p;
 289         int i;
 290         unsigned long l=7;
 291         BUF_MEM *buf;
 292         int no_chain;
 293
 294         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs)
 295                 no_chain = 1;
 296         else
 297                 no_chain = 0;
 298
 299         /* TLSv1 sends a chain with nothing in it, instead of an alert */
 300         buf=s->init_buf;
 301         if (!BUF_MEM_grow_clean(buf,10))
 302                 {
 303                 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
 304                 return(0);
 305                 }
 306         if (x != NULL)
 307                 {
 308                 if (no_chain)
 309                         {
 310                         if (ssl3_add_cert_to_buf(buf, &l, x))
 311                                 return(0);
 312                         }
 313                 else
 314                         {
 315                         X509_STORE_CTX xs_ctx;
 316
 317                         if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
 318                                 {
 319                                 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB);
 320                                 return(0);
 321                                 }
 322                         X509_verify_cert(&xs_ctx);
 323                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
 324                                 {
 325                                 x = sk_X509_value(xs_ctx.chain, i);
 326
 327                                 if (ssl3_add_cert_to_buf(buf, &l, x))
 328                                         {
 329                                         X509_STORE_CTX_cleanup(&xs_ctx);
 330                                         return 0;
 331                                         }
 332                                 }
 333                         X509_STORE_CTX_cleanup(&xs_ctx);
 334                         }
 335                 }
 336         /* Thawte special :-) */
 337         for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
 338                 {
 339                 x=sk_X509_value(s->ctx->extra_certs,i);
 340                 if (ssl3_add_cert_to_buf(buf, &l, x))
 341                         return(0);
 342                 }
 343
 344         l-=7;
 345         p=(unsigned char *)&(buf->data[4]);
 346         l2n3(l,p);
 347         l+=3;
 348         p=(unsigned char *)&(buf->data[0]);
 349         *(p++)=SSL3_MT_CERTIFICATE;
 350         l2n3(l,p);
 351         l+=4;
 352         return(l);
 353         }
 354
 355 /* Obtain handshake message of message type 'mt' (any if mt == -1),
 356  * maximum acceptable body length 'max'.
 357  * The first four bytes (msg_type and length) are read in state 'st1',
 358  * the body is read in state 'stn'.
 359  */
 360 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
 361         {
 362         unsigned char *p;
 363         unsigned long l;
 364         long n;
 365         int i,al;
 366
 367         if (s->s3->tmp.reuse_message)
 368                 {
 369                 s->s3->tmp.reuse_message=0;
 370                 if ((mt >= 0) && (s->s3->tmp.message_type != mt))
 371                         {
 372                         al=SSL_AD_UNEXPECTED_MESSAGE;
 373                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
 374                         goto f_err;
 375                         }
 376                 *ok=1;
 377                 s->init_msg = s->init_buf->data + 4;
 378                 s->init_num = (int)s->s3->tmp.message_size;
 379                 return s->init_num;
 380                 }
 381
 382         p=(unsigned char *)s->init_buf->data;
 383
 384         if (s->state == st1) /* s->init_num < 4 */
 385                 {
 386                 int skip_message;
 387
 388                 do
 389                         {
 390                         while (s->init_num < 4)
 391                                 {
 392                                 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
 393                                         &p[s->init_num],4 - s->init_num, 0);
 394                                 if (i <= 0)
 395                                         {
 396                                         s->rwstate=SSL_READING;
 397                                         *ok = 0;
 398                                         return i;
 399                                         }
 400                                 s->init_num+=i;
 401                                 }
 402
 403                         skip_message = 0;
 404                         if (!s->server)
 405                                 if (p[0] == SSL3_MT_HELLO_REQUEST)
 406                                         /* The server may always send 'Hello Request' messages --
 407                                          * we are doing a handshake anyway now, so ignore them
 408                                          * if their format is correct. Does not count for
 409                                          * 'Finished' MAC. */
 410                                         if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
 411                                                 {
 412                                                 s->init_num = 0;
 413                                                 skip_message = 1;
 414
 415                                                 if (s->msg_callback)
 416                                                         s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg);
 417                                                 }
 418                         }
 419                 while (skip_message);
 420
 421                 /* s->init_num == 4 */
 422
 423                 if ((mt >= 0) && (*p != mt))
 424                         {
 425                         al=SSL_AD_UNEXPECTED_MESSAGE;
 426                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
 427                         goto f_err;
 428                         }
 429                 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
 430                                         (st1 == SSL3_ST_SR_CERT_A) &&
 431                                         (stn == SSL3_ST_SR_CERT_B))
 432                         {
 433                         /* At this point we have got an MS SGC second client
 434                          * hello (maybe we should always allow the client to
 435                          * start a new handshake?). We need to restart the mac.
 436                          * Don't increment {num,total}_renegotiations because
 437                          * we have not completed the handshake. */
 438                         ssl3_init_finished_mac(s);
 439                         }
 440
 441                 s->s3->tmp.message_type= *(p++);
 442
 443                 n2l3(p,l);
 444                 if (l > (unsigned long)max)
 445                         {
 446                         al=SSL_AD_ILLEGAL_PARAMETER;
 447                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
 448                         goto f_err;
 449                         }
 450                 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
 451                         {
 452                         al=SSL_AD_ILLEGAL_PARAMETER;
 453                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
 454                         goto f_err;
 455                         }
 456                 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4))
 457                         {
 458                         SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
 459                         goto err;
 460                         }
 461                 s->s3->tmp.message_size=l;
 462                 s->state=stn;
 463
 464                 s->init_msg = s->init_buf->data + 4;
 465                 s->init_num = 0;
 466                 }
 467
 468         /* next state (stn) */
 469         p = s->init_msg;
 470         n = s->s3->tmp.message_size - s->init_num;
 471         while (n > 0)
 472                 {
 473                 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
 474                 if (i <= 0)
 475                         {
 476                         s->rwstate=SSL_READING;
 477                         *ok = 0;
 478                         return i;
 479                         }
 480                 s->init_num += i;
 481                 n -= i;
 482                 }
 483         ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
 484         if (s->msg_callback)
 485                 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
 486         *ok=1;
 487         return s->init_num;
 488 f_err:
 489         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 490 err:
 491         *ok=0;
 492         return(-1);
 493         }
 494
 495 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
 496         {
 497         EVP_PKEY *pk;
 498         int ret= -1,i;
 499
 500         if (pkey == NULL)
 501                 pk=X509_get_pubkey(x);
 502         else
 503                 pk=pkey;
 504         if (pk == NULL) goto err;
 505
 506         i=pk->type;
 507         if (i == EVP_PKEY_RSA)
 508                 {
 509                 ret=SSL_PKEY_RSA_ENC;
 510                 }
 511         else if (i == EVP_PKEY_DSA)
 512                 {
 513                 ret=SSL_PKEY_DSA_SIGN;
 514                 }
 515 #ifndef OPENSSL_NO_EC
 516         else if (i == EVP_PKEY_EC)
 517                 {
 518                 ret = SSL_PKEY_ECC;
 519                 }
 520 #endif
 521
 522 err:
 523         if(!pkey) EVP_PKEY_free(pk);
 524         return(ret);
 525         }
 526
 527 int ssl_verify_alarm_type(long type)
 528         {
 529         int al;
 530
 531         switch(type)
 532                 {
 533         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
 534         case X509_V_ERR_UNABLE_TO_GET_CRL:
 535         case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
 536                 al=SSL_AD_UNKNOWN_CA;
 537                 break;
 538         case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
 539         case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
 540         case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
 541         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
 542         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
 543         case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
 544         case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
 545         case X509_V_ERR_CERT_NOT_YET_VALID:
 546         case X509_V_ERR_CRL_NOT_YET_VALID:
 547         case X509_V_ERR_CERT_UNTRUSTED:
 548         case X509_V_ERR_CERT_REJECTED:
 549                 al=SSL_AD_BAD_CERTIFICATE;
 550                 break;
 551         case X509_V_ERR_CERT_SIGNATURE_FAILURE:
 552         case X509_V_ERR_CRL_SIGNATURE_FAILURE:
 553                 al=SSL_AD_DECRYPT_ERROR;
 554                 break;
 555         case X509_V_ERR_CERT_HAS_EXPIRED:
 556         case X509_V_ERR_CRL_HAS_EXPIRED:
 557                 al=SSL_AD_CERTIFICATE_EXPIRED;
 558                 break;
 559         case X509_V_ERR_CERT_REVOKED:
 560                 al=SSL_AD_CERTIFICATE_REVOKED;
 561                 break;
 562         case X509_V_ERR_OUT_OF_MEM:
 563                 al=SSL_AD_INTERNAL_ERROR;
 564                 break;
 565         case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
 566         case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
 567         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
 568         case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
 569         case X509_V_ERR_CERT_CHAIN_TOO_LONG:
 570         case X509_V_ERR_PATH_LENGTH_EXCEEDED:
 571         case X509_V_ERR_INVALID_CA:
 572                 al=SSL_AD_UNKNOWN_CA;
 573                 break;
 574         case X509_V_ERR_APPLICATION_VERIFICATION:
 575                 al=SSL_AD_HANDSHAKE_FAILURE;
 576                 break;
 577         case X509_V_ERR_INVALID_PURPOSE:
 578                 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
 579                 break;
 580         default:
 581                 al=SSL_AD_CERTIFICATE_UNKNOWN;
 582                 break;
 583                 }
 584         return(al);
 585         }
 586
 587 int ssl3_setup_buffers(SSL *s)
 588         {
 589         unsigned char *p;
 590         unsigned int extra,headerlen;
 591         size_t len;
 592
 593         if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
 594                 headerlen = DTLS1_RT_HEADER_LENGTH;
 595         else
 596                 headerlen = SSL3_RT_HEADER_LENGTH;
 597
 598         if (s->s3->rbuf.buf == NULL)
 599                 {
 600                 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
 601                         extra=SSL3_RT_MAX_EXTRA;
 602                 else
 603                         extra=0;
 604                 len = SSL3_RT_MAX_PACKET_SIZE + extra;
 605                 if ((p=OPENSSL_malloc(len)) == NULL)
 606                         goto err;
 607                 s->s3->rbuf.buf = p;
 608                 s->s3->rbuf.len = len;
 609                 }
 610
 611         if (s->s3->wbuf.buf == NULL)
 612                 {
 613                 len = SSL3_RT_MAX_PACKET_SIZE;
 614                 len += headerlen + 256; /* extra space for empty fragment */
 615                 if ((p=OPENSSL_malloc(len)) == NULL)
 616                         goto err;
 617                 s->s3->wbuf.buf = p;
 618                 s->s3->wbuf.len = len;
 619                 }
 620         s->packet= &(s->s3->rbuf.buf[0]);
 621         return(1);
 622 err:
 623         SSLerr(SSL_F_SSL3_SETUP_BUFFERS,ERR_R_MALLOC_FAILURE);
 624         return(0);
 625         }