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) 1998-2001 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 #include <limits.h>
 113 #include <string.h>
 114 #include <stdio.h>
 115 #include <openssl/buffer.h>
 116 #include <openssl/rand.h>
 117 #include <openssl/objects.h>
 118 #include <openssl/evp.h>
 119 #include <openssl/x509.h>
 120 #include "ssl_locl.h"
 121
 122 /* send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or SSL3_RT_CHANGE_CIPHER_SPEC) */
 123 int ssl3_do_write(SSL *s, int type)
 124         {
 125         int ret;
 126
 127         ret=ssl3_write_bytes(s,type,&s->init_buf->data[s->init_off],
 128                              s->init_num);
 129         if (ret < 0) return(-1);
 130         if (type == SSL3_RT_HANDSHAKE)
 131                 /* should not be done for 'Hello Request's, but in that case
 132                  * we'll ignore the result anyway */
 133                 ssl3_finish_mac(s,(unsigned char *)&s->init_buf->data[s->init_off],ret);
 134
 135         if (ret == s->init_num)
 136                 {
 137                 if (s->msg_callback)
 138                         s->msg_callback(1, s->version, type, s->init_buf->data, (size_t)(s->init_off + s->init_num), s, s->msg_callback_arg);
 139                 return(1);
 140                 }
 141         s->init_off+=ret;
 142         s->init_num-=ret;
 143         return(0);
 144         }
 145
 146 int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen)
 147         {
 148         unsigned char *p,*d;
 149         int i;
 150         unsigned long l;
 151
 152         if (s->state == a)
 153                 {
 154                 d=(unsigned char *)s->init_buf->data;
 155                 p= &(d[4]);
 156
 157                 i=s->method->ssl3_enc->final_finish_mac(s,
 158                         &(s->s3->finish_dgst1),
 159                         &(s->s3->finish_dgst2),
 160                         sender,slen,s->s3->tmp.finish_md);
 161                 s->s3->tmp.finish_md_len = i;
 162                 memcpy(p, s->s3->tmp.finish_md, i);
 163                 p+=i;
 164                 l=i;
 165
 166 #ifdef OPENSSL_SYS_WIN16
 167                 /* MSVC 1.5 does not clear the top bytes of the word unless
 168                  * I do this.
 169                  */
 170                 l&=0xffff;
 171 #endif
 172
 173                 *(d++)=SSL3_MT_FINISHED;
 174                 l2n3(l,d);
 175                 s->init_num=(int)l+4;
 176                 s->init_off=0;
 177
 178                 s->state=b;
 179                 }
 180
 181         /* SSL3_ST_SEND_xxxxxx_HELLO_B */
 182         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
 183         }
 184
 185 int ssl3_get_finished(SSL *s, int a, int b)
 186         {
 187         int al,i,ok;
 188         long n;
 189         unsigned char *p;
 190
 191         /* the mac has already been generated when we received the
 192          * change cipher spec message and is in s->s3->tmp.peer_finish_md
 193          */
 194
 195         n=ssl3_get_message(s,
 196                 a,
 197                 b,
 198                 SSL3_MT_FINISHED,
 199                 64, /* should actually be 36+4 :-) */
 200                 &ok);
 201
 202         if (!ok) return((int)n);
 203
 204         /* If this occurs, we have missed a message */
 205         if (!s->s3->change_cipher_spec)
 206                 {
 207                 al=SSL_AD_UNEXPECTED_MESSAGE;
 208                 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
 209                 goto f_err;
 210                 }
 211         s->s3->change_cipher_spec=0;
 212
 213         p = (unsigned char *)s->init_msg;
 214         i = s->s3->tmp.peer_finish_md_len;
 215
 216         if (i != n)
 217                 {
 218                 al=SSL_AD_DECODE_ERROR;
 219                 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
 220                 goto f_err;
 221                 }
 222
 223         if (memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
 224                 {
 225                 al=SSL_AD_DECRYPT_ERROR;
 226                 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
 227                 goto f_err;
 228                 }
 229
 230         return(1);
 231 f_err:
 232         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 233         return(0);
 234         }
 235
 236 /* for these 2 messages, we need to
 237  * ssl->enc_read_ctx                    re-init
 238  * ssl->s3->read_sequence               zero
 239  * ssl->s3->read_mac_secret             re-init
 240  * ssl->session->read_sym_enc           assign
 241  * ssl->session->read_compression       assign
 242  * ssl->session->read_hash              assign
 243  */
 244 int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
 245         {
 246         unsigned char *p;
 247
 248         if (s->state == a)
 249                 {
 250                 p=(unsigned char *)s->init_buf->data;
 251                 *p=SSL3_MT_CCS;
 252                 s->init_num=1;
 253                 s->init_off=0;
 254
 255                 s->state=b;
 256                 }
 257
 258         /* SSL3_ST_CW_CHANGE_B */
 259         return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
 260         }
 261
 262 unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
 263         {
 264         unsigned char *p;
 265         int n,i;
 266         unsigned long l=7;
 267         BUF_MEM *buf;
 268         X509_STORE_CTX xs_ctx;
 269         X509_OBJECT obj;
 270
 271         /* TLSv1 sends a chain with nothing in it, instead of an alert */
 272         buf=s->init_buf;
 273         if (!BUF_MEM_grow(buf,(int)(10)))
 274                 {
 275                 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
 276                 return(0);
 277                 }
 278         if (x != NULL)
 279                 {
 280                 if(!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,NULL,NULL))
 281                         {
 282                         SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB);
 283                         return(0);
 284                         }
 285
 286                 for (;;)
 287                         {
 288                         n=i2d_X509(x,NULL);
 289                         if (!BUF_MEM_grow(buf,(int)(n+l+3)))
 290                                 {
 291                                 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
 292                                 return(0);
 293                                 }
 294                         p=(unsigned char *)&(buf->data[l]);
 295                         l2n3(n,p);
 296                         i2d_X509(x,&p);
 297                         l+=n+3;
 298                         if (X509_NAME_cmp(X509_get_subject_name(x),
 299                                 X509_get_issuer_name(x)) == 0) break;
 300
 301                         i=X509_STORE_get_by_subject(&xs_ctx,X509_LU_X509,
 302                                 X509_get_issuer_name(x),&obj);
 303                         if (i <= 0) break;
 304                         x=obj.data.x509;
 305                         /* Count is one too high since the X509_STORE_get uped the
 306                          * ref count */
 307                         X509_free(x);
 308                         }
 309
 310                 X509_STORE_CTX_cleanup(&xs_ctx);
 311                 }
 312
 313         /* Thawte special :-) */
 314         if (s->ctx->extra_certs != NULL)
 315         for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
 316                 {
 317                 x=sk_X509_value(s->ctx->extra_certs,i);
 318                 n=i2d_X509(x,NULL);
 319                 if (!BUF_MEM_grow(buf,(int)(n+l+3)))
 320                         {
 321                         SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
 322                         return(0);
 323                         }
 324                 p=(unsigned char *)&(buf->data[l]);
 325                 l2n3(n,p);
 326                 i2d_X509(x,&p);
 327                 l+=n+3;
 328                 }
 329
 330         l-=7;
 331         p=(unsigned char *)&(buf->data[4]);
 332         l2n3(l,p);
 333         l+=3;
 334         p=(unsigned char *)&(buf->data[0]);
 335         *(p++)=SSL3_MT_CERTIFICATE;
 336         l2n3(l,p);
 337         l+=4;
 338         return(l);
 339         }
 340
 341 /* Obtain handshake message of message type 'mt' (any if mt == -1),
 342  * maximum acceptable body length 'max'.
 343  * The first four bytes (msg_type and length) are read in state 'st1',
 344  * the body is read in state 'stn'.
 345  */
 346 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
 347         {
 348         unsigned char *p;
 349         unsigned long l;
 350         long n;
 351         int i,al;
 352
 353         if (s->s3->tmp.reuse_message)
 354                 {
 355                 s->s3->tmp.reuse_message=0;
 356                 if ((mt >= 0) && (s->s3->tmp.message_type != mt))
 357                         {
 358                         al=SSL_AD_UNEXPECTED_MESSAGE;
 359                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
 360                         goto f_err;
 361                         }
 362                 *ok=1;
 363                 s->init_msg = s->init_buf->data + 4;
 364                 s->init_num = (int)s->s3->tmp.message_size;
 365                 return s->init_num;
 366                 }
 367
 368         p=(unsigned char *)s->init_buf->data;
 369
 370         if (s->state == st1) /* s->init_num < 4 */
 371                 {
 372                 int skip_message;
 373
 374                 do
 375                         {
 376                         while (s->init_num < 4)
 377                                 {
 378                                 i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],
 379                                         4 - s->init_num, 0);
 380                                 if (i <= 0)
 381                                         {
 382                                         s->rwstate=SSL_READING;
 383                                         *ok = 0;
 384                                         return i;
 385                                         }
 386                                 s->init_num+=i;
 387                                 }
 388
 389                         skip_message = 0;
 390                         if (!s->server)
 391                                 if (p[0] == SSL3_MT_HELLO_REQUEST)
 392                                         /* The server may always send 'Hello Request' messages --
 393                                          * we are doing a handshake anyway now, so ignore them
 394                                          * if their format is correct. Does not count for
 395                                          * 'Finished' MAC. */
 396                                         if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
 397                                                 {
 398                                                 s->init_num = 0;
 399                                                 skip_message = 1;
 400
 401                                                 if (s->msg_callback)
 402                                                         s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg);
 403                                                 }
 404                         }
 405                 while (skip_message);
 406
 407                 /* s->init_num == 4 */
 408
 409                 if ((mt >= 0) && (*p != mt))
 410                         {
 411                         al=SSL_AD_UNEXPECTED_MESSAGE;
 412                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
 413                         goto f_err;
 414                         }
 415                 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
 416                                         (st1 == SSL3_ST_SR_CERT_A) &&
 417                                         (stn == SSL3_ST_SR_CERT_B))
 418                         {
 419                         /* At this point we have got an MS SGC second client
 420                          * hello (maybe we should always allow the client to
 421                          * start a new handshake?). We need to restart the mac.
 422                          * Don't increment {num,total}_renegotiations because
 423                          * we have not completed the handshake. */
 424                         ssl3_init_finished_mac(s);
 425                         }
 426
 427                 s->s3->tmp.message_type= *(p++);
 428
 429                 n2l3(p,l);
 430                 if (l > (unsigned long)max)
 431                         {
 432                         al=SSL_AD_ILLEGAL_PARAMETER;
 433                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
 434                         goto f_err;
 435                         }
 436                 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
 437                         {
 438                         al=SSL_AD_ILLEGAL_PARAMETER;
 439                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
 440                         goto f_err;
 441                         }
 442                 if (l && !BUF_MEM_grow(s->init_buf,(int)l+4))
 443                         {
 444                         SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
 445                         goto err;
 446                         }
 447                 s->s3->tmp.message_size=l;
 448                 s->state=stn;
 449
 450                 s->init_msg = s->init_buf->data + 4;
 451                 s->init_num = 0;
 452                 }
 453
 454         /* next state (stn) */
 455         p = s->init_msg;
 456         n = s->s3->tmp.message_size - s->init_num;
 457         while (n > 0)
 458                 {
 459                 i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
 460                 if (i <= 0)
 461                         {
 462                         s->rwstate=SSL_READING;
 463                         *ok = 0;
 464                         return i;
 465                         }
 466                 s->init_num += i;
 467                 n -= i;
 468                 }
 469         ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
 470         if (s->msg_callback)
 471                 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
 472         *ok=1;
 473         return s->init_num;
 474 f_err:
 475         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 476 err:
 477         *ok=0;
 478         return(-1);
 479         }
 480
 481 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
 482         {
 483         EVP_PKEY *pk;
 484         int ret= -1,i,j;
 485
 486         if (pkey == NULL)
 487                 pk=X509_get_pubkey(x);
 488         else
 489                 pk=pkey;
 490         if (pk == NULL) goto err;
 491
 492         i=pk->type;
 493         if (i == EVP_PKEY_RSA)
 494                 {
 495                 ret=SSL_PKEY_RSA_ENC;
 496                 if (x != NULL)
 497                         {
 498                         j=X509_get_ext_count(x);
 499                         /* check to see if this is a signing only certificate */
 500                         /* EAY EAY EAY EAY */
 501                         }
 502                 }
 503         else if (i == EVP_PKEY_DSA)
 504                 {
 505                 ret=SSL_PKEY_DSA_SIGN;
 506                 }
 507         else if (i == EVP_PKEY_DH)
 508                 {
 509                 /* if we just have a key, we needs to be guess */
 510
 511                 if (x == NULL)
 512                         ret=SSL_PKEY_DH_DSA;
 513                 else
 514                         {
 515                         j=X509_get_signature_type(x);
 516                         if (j == EVP_PKEY_RSA)
 517                                 ret=SSL_PKEY_DH_RSA;
 518                         else if (j== EVP_PKEY_DSA)
 519                                 ret=SSL_PKEY_DH_DSA;
 520                         else ret= -1;
 521                         }
 522                 }
 523         else
 524                 ret= -1;
 525
 526 err:
 527         if(!pkey) EVP_PKEY_free(pk);
 528         return(ret);
 529         }
 530
 531 int ssl_verify_alarm_type(long type)
 532         {
 533         int al;
 534
 535         switch(type)
 536                 {
 537         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
 538         case X509_V_ERR_UNABLE_TO_GET_CRL:
 539         case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
 540                 al=SSL_AD_UNKNOWN_CA;
 541                 break;
 542         case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
 543         case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
 544         case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
 545         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
 546         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
 547         case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
 548         case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
 549         case X509_V_ERR_CERT_NOT_YET_VALID:
 550         case X509_V_ERR_CRL_NOT_YET_VALID:
 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                 al=SSL_AD_UNKNOWN_CA;
 573                 break;
 574         case X509_V_ERR_APPLICATION_VERIFICATION:
 575                 al=SSL_AD_HANDSHAKE_FAILURE;
 576                 break;
 577         default:
 578                 al=SSL_AD_CERTIFICATE_UNKNOWN;
 579                 break;
 580                 }
 581         return(al);
 582         }
 583
 584 int ssl3_setup_buffers(SSL *s)
 585         {
 586         unsigned char *p;
 587         unsigned int extra;
 588
 589         if (s->s3->rbuf.buf == NULL)
 590                 {
 591                 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
 592                         extra=SSL3_RT_MAX_EXTRA;
 593                 else
 594                         extra=0;
 595                 if ((p=OPENSSL_malloc(SSL3_RT_MAX_PACKET_SIZE+extra))
 596                         == NULL)
 597                         goto err;
 598                 s->s3->rbuf.buf=p;
 599                 }
 600
 601         if (s->s3->wbuf.buf == NULL)
 602                 {
 603                 if ((p=OPENSSL_malloc(SSL3_RT_MAX_PACKET_SIZE))
 604                         == NULL)
 605                         goto err;
 606                 s->s3->wbuf.buf=p;
 607                 }
 608         s->packet= &(s->s3->rbuf.buf[0]);
 609         return(1);
 610 err:
 611         SSLerr(SSL_F_SSL3_SETUP_BUFFERS,ERR_R_MALLOC_FAILURE);
 612         return(0);
 613         }