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) 1998-2000 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' */
 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                 return(1);
 137         s->init_off+=ret;
 138         s->init_num-=ret;
 139         return(0);
 140         }
 141
 142 int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen)
 143         {
 144         unsigned char *p,*d;
 145         int i;
 146         unsigned long l;
 147
 148         if (s->state == a)
 149                 {
 150                 d=(unsigned char *)s->init_buf->data;
 151                 p= &(d[4]);
 152
 153                 i=s->method->ssl3_enc->final_finish_mac(s,
 154                         &(s->s3->finish_dgst1),
 155                         &(s->s3->finish_dgst2),
 156                         sender,slen,s->s3->tmp.finish_md);
 157                 s->s3->tmp.finish_md_len = i;
 158                 memcpy(p, s->s3->tmp.finish_md, i);
 159                 p+=i;
 160                 l=i;
 161
 162 #ifdef OPENSSL_SYS_WIN16
 163                 /* MSVC 1.5 does not clear the top bytes of the word unless
 164                  * I do this.
 165                  */
 166                 l&=0xffff;
 167 #endif
 168
 169                 *(d++)=SSL3_MT_FINISHED;
 170                 l2n3(l,d);
 171                 s->init_num=(int)l+4;
 172                 s->init_off=0;
 173
 174                 s->state=b;
 175                 }
 176
 177         /* SSL3_ST_SEND_xxxxxx_HELLO_B */
 178         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
 179         }
 180
 181 int ssl3_get_finished(SSL *s, int a, int b)
 182         {
 183         int al,i,ok;
 184         long n;
 185         unsigned char *p;
 186
 187         /* the mac has already been generated when we received the
 188          * change cipher spec message and is in s->s3->tmp.peer_finish_md
 189          */
 190
 191         n=ssl3_get_message(s,
 192                 a,
 193                 b,
 194                 SSL3_MT_FINISHED,
 195                 64, /* should actually be 36+4 :-) */
 196                 &ok);
 197
 198         if (!ok) return((int)n);
 199
 200         /* If this occurs, we have missed a message */
 201         if (!s->s3->change_cipher_spec)
 202                 {
 203                 al=SSL_AD_UNEXPECTED_MESSAGE;
 204                 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
 205                 goto f_err;
 206                 }
 207         s->s3->change_cipher_spec=0;
 208
 209         p = (unsigned char *)s->init_msg;
 210         i = s->s3->tmp.peer_finish_md_len;
 211
 212         if (i != n)
 213                 {
 214                 al=SSL_AD_DECODE_ERROR;
 215                 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
 216                 goto f_err;
 217                 }
 218
 219         if (memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
 220                 {
 221                 al=SSL_AD_DECRYPT_ERROR;
 222                 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
 223                 goto f_err;
 224                 }
 225
 226         return(1);
 227 f_err:
 228         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 229         return(0);
 230         }
 231
 232 /* for these 2 messages, we need to
 233  * ssl->enc_read_ctx                    re-init
 234  * ssl->s3->read_sequence               zero
 235  * ssl->s3->read_mac_secret             re-init
 236  * ssl->session->read_sym_enc           assign
 237  * ssl->session->read_compression       assign
 238  * ssl->session->read_hash              assign
 239  */
 240 int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
 241         {
 242         unsigned char *p;
 243
 244         if (s->state == a)
 245                 {
 246                 p=(unsigned char *)s->init_buf->data;
 247                 *p=SSL3_MT_CCS;
 248                 s->init_num=1;
 249                 s->init_off=0;
 250
 251                 s->state=b;
 252                 }
 253
 254         /* SSL3_ST_CW_CHANGE_B */
 255         return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
 256         }
 257
 258 unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
 259         {
 260         unsigned char *p;
 261         int n,i;
 262         unsigned long l=7;
 263         BUF_MEM *buf;
 264         X509_STORE_CTX xs_ctx;
 265         X509_OBJECT obj;
 266
 267         /* TLSv1 sends a chain with nothing in it, instead of an alert */
 268         buf=s->init_buf;
 269         if (!BUF_MEM_grow(buf,(int)(10)))
 270                 {
 271                 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
 272                 return(0);
 273                 }
 274         if (x != NULL)
 275                 {
 276                 if(!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,NULL,NULL))
 277                         {
 278                         SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB);
 279                         return(0);
 280                         }
 281
 282                 for (;;)
 283                         {
 284                         n=i2d_X509(x,NULL);
 285                         if (!BUF_MEM_grow(buf,(int)(n+l+3)))
 286                                 {
 287                                 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
 288                                 return(0);
 289                                 }
 290                         p=(unsigned char *)&(buf->data[l]);
 291                         l2n3(n,p);
 292                         i2d_X509(x,&p);
 293                         l+=n+3;
 294                         if (X509_NAME_cmp(X509_get_subject_name(x),
 295                                 X509_get_issuer_name(x)) == 0) break;
 296
 297                         i=X509_STORE_get_by_subject(&xs_ctx,X509_LU_X509,
 298                                 X509_get_issuer_name(x),&obj);
 299                         if (i <= 0) break;
 300                         x=obj.data.x509;
 301                         /* Count is one too high since the X509_STORE_get uped the
 302                          * ref count */
 303                         X509_free(x);
 304                         }
 305
 306                 X509_STORE_CTX_cleanup(&xs_ctx);
 307                 }
 308
 309         /* Thawte special :-) */
 310         if (s->ctx->extra_certs != NULL)
 311         for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
 312                 {
 313                 x=sk_X509_value(s->ctx->extra_certs,i);
 314                 n=i2d_X509(x,NULL);
 315                 if (!BUF_MEM_grow(buf,(int)(n+l+3)))
 316                         {
 317                         SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
 318                         return(0);
 319                         }
 320                 p=(unsigned char *)&(buf->data[l]);
 321                 l2n3(n,p);
 322                 i2d_X509(x,&p);
 323                 l+=n+3;
 324                 }
 325
 326         l-=7;
 327         p=(unsigned char *)&(buf->data[4]);
 328         l2n3(l,p);
 329         l+=3;
 330         p=(unsigned char *)&(buf->data[0]);
 331         *(p++)=SSL3_MT_CERTIFICATE;
 332         l2n3(l,p);
 333         l+=4;
 334         return(l);
 335         }
 336
 337 /* Obtain handshake message of message type 'mt' (any if mt == -1),
 338  * maximum acceptable body length 'max'.
 339  * The first four bytes (msg_type and length) are read in state 'st1',
 340  * the body is read in state 'stn'.
 341  */
 342 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
 343         {
 344         unsigned char *p;
 345         unsigned long l;
 346         long n;
 347         int i,al;
 348
 349         if (s->s3->tmp.reuse_message)
 350                 {
 351                 s->s3->tmp.reuse_message=0;
 352                 if ((mt >= 0) && (s->s3->tmp.message_type != mt))
 353                         {
 354                         al=SSL_AD_UNEXPECTED_MESSAGE;
 355                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
 356                         goto f_err;
 357                         }
 358                 *ok=1;
 359                 s->init_msg = s->init_buf->data + 4;
 360                 return((int)s->s3->tmp.message_size);
 361                 }
 362
 363         p=(unsigned char *)s->init_buf->data;
 364
 365         if (s->state == st1) /* s->init_num < 4 */
 366                 {
 367                 int skip_message;
 368
 369                 do
 370                         {
 371                         while (s->init_num < 4)
 372                                 {
 373                                 i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],
 374                                         4 - s->init_num, 0);
 375                                 if (i <= 0)
 376                                         {
 377                                         s->rwstate=SSL_READING;
 378                                         *ok = 0;
 379                                         return i;
 380                                         }
 381                                 s->init_num+=i;
 382                                 }
 383
 384                         skip_message = 0;
 385                         if (!s->server)
 386                                 if (p[0] == SSL3_MT_HELLO_REQUEST)
 387                                         /* The server may always send 'Hello Request' messages --
 388                                          * we are doing a handshake anyway now, so ignore them
 389                                          * if their format is correct. Does not count for
 390                                          * 'Finished' MAC. */
 391                                         if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
 392                                                 {
 393                                                 s->init_num = 0;
 394                                                 skip_message = 1;
 395                                                 }
 396
 397                         }
 398                 while (skip_message);
 399
 400                 /* s->init_num == 4 */
 401
 402                 if ((mt >= 0) && (*p != mt))
 403                         {
 404                         al=SSL_AD_UNEXPECTED_MESSAGE;
 405                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
 406                         goto f_err;
 407                         }
 408                 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
 409                                         (st1 == SSL3_ST_SR_CERT_A) &&
 410                                         (stn == SSL3_ST_SR_CERT_B))
 411                         {
 412                         /* At this point we have got an MS SGC second client
 413                          * hello (maybe we should always allow the client to
 414                          * start a new handshake?). We need to restart the mac.
 415                          * Don't increment {num,total}_renegotiations because
 416                          * we have not completed the handshake. */
 417                         ssl3_init_finished_mac(s);
 418                         }
 419
 420                 s->s3->tmp.message_type= *(p++);
 421
 422                 n2l3(p,l);
 423                 if (l > (unsigned long)max)
 424                         {
 425                         al=SSL_AD_ILLEGAL_PARAMETER;
 426                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
 427                         goto f_err;
 428                         }
 429                 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
 430                         {
 431                         al=SSL_AD_ILLEGAL_PARAMETER;
 432                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
 433                         goto f_err;
 434                         }
 435                 if (l && !BUF_MEM_grow(s->init_buf,(int)l+4))
 436                         {
 437                         SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
 438                         goto err;
 439                         }
 440                 s->s3->tmp.message_size=l;
 441                 s->state=stn;
 442
 443                 s->init_msg = s->init_buf->data + 4;
 444                 s->init_num = 0;
 445                 }
 446
 447         /* next state (stn) */
 448         p = s->init_msg;
 449         n = s->s3->tmp.message_size - s->init_num;
 450         while (n > 0)
 451                 {
 452                 i=ssl3_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
 453                 if (i <= 0)
 454                         {
 455                         s->rwstate=SSL_READING;
 456                         *ok = 0;
 457                         return i;
 458                         }
 459                 s->init_num += i;
 460                 n -= i;
 461                 }
 462         ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
 463         *ok=1;
 464         return s->init_num;
 465 f_err:
 466         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 467 err:
 468         *ok=0;
 469         return(-1);
 470         }
 471
 472 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
 473         {
 474         EVP_PKEY *pk;
 475         int ret= -1,i,j;
 476
 477         if (pkey == NULL)
 478                 pk=X509_get_pubkey(x);
 479         else
 480                 pk=pkey;
 481         if (pk == NULL) goto err;
 482
 483         i=pk->type;
 484         if (i == EVP_PKEY_RSA)
 485                 {
 486                 ret=SSL_PKEY_RSA_ENC;
 487                 if (x != NULL)
 488                         {
 489                         j=X509_get_ext_count(x);
 490                         /* check to see if this is a signing only certificate */
 491                         /* EAY EAY EAY EAY */
 492                         }
 493                 }
 494         else if (i == EVP_PKEY_DSA)
 495                 {
 496                 ret=SSL_PKEY_DSA_SIGN;
 497                 }
 498         else if (i == EVP_PKEY_DH)
 499                 {
 500                 /* if we just have a key, we needs to be guess */
 501
 502                 if (x == NULL)
 503                         ret=SSL_PKEY_DH_DSA;
 504                 else
 505                         {
 506                         j=X509_get_signature_type(x);
 507                         if (j == EVP_PKEY_RSA)
 508                                 ret=SSL_PKEY_DH_RSA;
 509                         else if (j== EVP_PKEY_DSA)
 510                                 ret=SSL_PKEY_DH_DSA;
 511                         else ret= -1;
 512                         }
 513                 }
 514         else
 515                 ret= -1;
 516
 517 err:
 518         if(!pkey) EVP_PKEY_free(pk);
 519         return(ret);
 520         }
 521
 522 int ssl_verify_alarm_type(long type)
 523         {
 524         int al;
 525
 526         switch(type)
 527                 {
 528         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
 529         case X509_V_ERR_UNABLE_TO_GET_CRL:
 530         case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
 531                 al=SSL_AD_UNKNOWN_CA;
 532                 break;
 533         case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
 534         case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
 535         case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
 536         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
 537         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
 538         case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
 539         case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
 540         case X509_V_ERR_CERT_NOT_YET_VALID:
 541         case X509_V_ERR_CRL_NOT_YET_VALID:
 542                 al=SSL_AD_BAD_CERTIFICATE;
 543                 break;
 544         case X509_V_ERR_CERT_SIGNATURE_FAILURE:
 545         case X509_V_ERR_CRL_SIGNATURE_FAILURE:
 546                 al=SSL_AD_DECRYPT_ERROR;
 547                 break;
 548         case X509_V_ERR_CERT_HAS_EXPIRED:
 549         case X509_V_ERR_CRL_HAS_EXPIRED:
 550                 al=SSL_AD_CERTIFICATE_EXPIRED;
 551                 break;
 552         case X509_V_ERR_CERT_REVOKED:
 553                 al=SSL_AD_CERTIFICATE_REVOKED;
 554                 break;
 555         case X509_V_ERR_OUT_OF_MEM:
 556                 al=SSL_AD_INTERNAL_ERROR;
 557                 break;
 558         case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
 559         case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
 560         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
 561         case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
 562         case X509_V_ERR_CERT_CHAIN_TOO_LONG:
 563                 al=SSL_AD_UNKNOWN_CA;
 564                 break;
 565         case X509_V_ERR_APPLICATION_VERIFICATION:
 566                 al=SSL_AD_HANDSHAKE_FAILURE;
 567                 break;
 568         default:
 569                 al=SSL_AD_CERTIFICATE_UNKNOWN;
 570                 break;
 571                 }
 572         return(al);
 573         }
 574
 575 int ssl3_setup_buffers(SSL *s)
 576         {
 577         unsigned char *p;
 578         unsigned int extra;
 579
 580         if (s->s3->rbuf.buf == NULL)
 581                 {
 582                 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
 583                         extra=SSL3_RT_MAX_EXTRA;
 584                 else
 585                         extra=0;
 586                 if ((p=OPENSSL_malloc(SSL3_RT_MAX_PACKET_SIZE+extra))
 587                         == NULL)
 588                         goto err;
 589                 s->s3->rbuf.buf=p;
 590                 }
 591
 592         if (s->s3->wbuf.buf == NULL)
 593                 {
 594                 if ((p=OPENSSL_malloc(SSL3_RT_MAX_PACKET_SIZE))
 595                         == NULL)
 596                         goto err;
 597                 s->s3->wbuf.buf=p;
 598                 }
 599         s->packet= &(s->s3->rbuf.buf[0]);
 600         return(1);
 601 err:
 602         SSLerr(SSL_F_SSL3_SETUP_BUFFERS,ERR_R_MALLOC_FAILURE);
 603         return(0);
 604         }