crypto/openssl/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                 /* Copy the finished so we can use it for
 172                    renegotiation checks */
 173                 if(s->type == SSL_ST_CONNECT)
 174                         {
 175                          OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
 176                          memcpy(s->s3->previous_client_finished,
 177                              s->s3->tmp.finish_md, i);
 178                          s->s3->previous_client_finished_len=i;
 179                         }
 180                 else
 181                         {
 182                         OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
 183                         memcpy(s->s3->previous_server_finished,
 184                             s->s3->tmp.finish_md, i);
 185                         s->s3->previous_server_finished_len=i;
 186                         }
 187
 188 #ifdef OPENSSL_SYS_WIN16
 189                 /* MSVC 1.5 does not clear the top bytes of the word unless
 190                  * I do this.
 191                  */
 192                 l&=0xffff;
 193 #endif
 194
 195                 *(d++)=SSL3_MT_FINISHED;
 196                 l2n3(l,d);
 197                 s->init_num=(int)l+4;
 198                 s->init_off=0;
 199
 200                 s->state=b;
 201                 }
 202
 203         /* SSL3_ST_SEND_xxxxxx_HELLO_B */
 204         return(ssl3_do_write(s,SSL3_RT_HANDSHAKE));
 205         }
 206
 207 int ssl3_get_finished(SSL *s, int a, int b)
 208         {
 209         int al,i,ok;
 210         long n;
 211         unsigned char *p;
 212
 213         /* the mac has already been generated when we received the
 214          * change cipher spec message and is in s->s3->tmp.peer_finish_md
 215          */
 216
 217         n=s->method->ssl_get_message(s,
 218                 a,
 219                 b,
 220                 SSL3_MT_FINISHED,
 221                 64, /* should actually be 36+4 :-) */
 222                 &ok);
 223
 224         if (!ok) return((int)n);
 225
 226         /* If this occurs, we have missed a message */
 227         if (!s->s3->change_cipher_spec)
 228                 {
 229                 al=SSL_AD_UNEXPECTED_MESSAGE;
 230                 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_GOT_A_FIN_BEFORE_A_CCS);
 231                 goto f_err;
 232                 }
 233         s->s3->change_cipher_spec=0;
 234
 235         p = (unsigned char *)s->init_msg;
 236         i = s->s3->tmp.peer_finish_md_len;
 237
 238         if (i != n)
 239                 {
 240                 al=SSL_AD_DECODE_ERROR;
 241                 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_BAD_DIGEST_LENGTH);
 242                 goto f_err;
 243                 }
 244
 245         if (memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
 246                 {
 247                 al=SSL_AD_DECRYPT_ERROR;
 248                 SSLerr(SSL_F_SSL3_GET_FINISHED,SSL_R_DIGEST_CHECK_FAILED);
 249                 goto f_err;
 250                 }
 251
 252         /* Copy the finished so we can use it for
 253            renegotiation checks */
 254         if(s->type == SSL_ST_ACCEPT)
 255                 {
 256                 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
 257                 memcpy(s->s3->previous_client_finished,
 258                     s->s3->tmp.peer_finish_md, i);
 259                 s->s3->previous_client_finished_len=i;
 260                 }
 261         else
 262                 {
 263                 OPENSSL_assert(i <= EVP_MAX_MD_SIZE);
 264                 memcpy(s->s3->previous_server_finished,
 265                     s->s3->tmp.peer_finish_md, i);
 266                 s->s3->previous_server_finished_len=i;
 267                 }
 268
 269         return(1);
 270 f_err:
 271         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 272         return(0);
 273         }
 274
 275 /* for these 2 messages, we need to
 276  * ssl->enc_read_ctx                    re-init
 277  * ssl->s3->read_sequence               zero
 278  * ssl->s3->read_mac_secret             re-init
 279  * ssl->session->read_sym_enc           assign
 280  * ssl->session->read_compression       assign
 281  * ssl->session->read_hash              assign
 282  */
 283 int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
 284         {
 285         unsigned char *p;
 286
 287         if (s->state == a)
 288                 {
 289                 p=(unsigned char *)s->init_buf->data;
 290                 *p=SSL3_MT_CCS;
 291                 s->init_num=1;
 292                 s->init_off=0;
 293
 294                 s->state=b;
 295                 }
 296
 297         /* SSL3_ST_CW_CHANGE_B */
 298         return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
 299         }
 300
 301 static int ssl3_add_cert_to_buf(BUF_MEM *buf, unsigned long *l, X509 *x)
 302         {
 303                 int n;
 304                 unsigned char *p;
 305
 306                 n=i2d_X509(x,NULL);
 307                 if (!BUF_MEM_grow_clean(buf,(int)(n+(*l)+3)))
 308                         {
 309                                 SSLerr(SSL_F_SSL3_ADD_CERT_TO_BUF,ERR_R_BUF_LIB);
 310                                 return(-1);
 311                         }
 312                 p=(unsigned char *)&(buf->data[*l]);
 313                 l2n3(n,p);
 314                 i2d_X509(x,&p);
 315                 *l+=n+3;
 316
 317                 return(0);
 318         }
 319
 320 unsigned long ssl3_output_cert_chain(SSL *s, X509 *x)
 321         {
 322         unsigned char *p;
 323         int i;
 324         unsigned long l=7;
 325         BUF_MEM *buf;
 326         int no_chain;
 327
 328         if ((s->mode & SSL_MODE_NO_AUTO_CHAIN) || s->ctx->extra_certs)
 329                 no_chain = 1;
 330         else
 331                 no_chain = 0;
 332
 333         /* TLSv1 sends a chain with nothing in it, instead of an alert */
 334         buf=s->init_buf;
 335         if (!BUF_MEM_grow_clean(buf,10))
 336                 {
 337                 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_BUF_LIB);
 338                 return(0);
 339                 }
 340         if (x != NULL)
 341                 {
 342                 if (no_chain)
 343                         {
 344                         if (ssl3_add_cert_to_buf(buf, &l, x))
 345                                 return(0);
 346                         }
 347                 else
 348                         {
 349                         X509_STORE_CTX xs_ctx;
 350
 351                         if (!X509_STORE_CTX_init(&xs_ctx,s->ctx->cert_store,x,NULL))
 352                                 {
 353                                 SSLerr(SSL_F_SSL3_OUTPUT_CERT_CHAIN,ERR_R_X509_LIB);
 354                                 return(0);
 355                                 }
 356                         X509_verify_cert(&xs_ctx);
 357                         for (i=0; i < sk_X509_num(xs_ctx.chain); i++)
 358                                 {
 359                                 x = sk_X509_value(xs_ctx.chain, i);
 360
 361                                 if (ssl3_add_cert_to_buf(buf, &l, x))
 362                                         {
 363                                         X509_STORE_CTX_cleanup(&xs_ctx);
 364                                         return 0;
 365                                         }
 366                                 }
 367                         X509_STORE_CTX_cleanup(&xs_ctx);
 368                         }
 369                 }
 370         /* Thawte special :-) */
 371         for (i=0; i<sk_X509_num(s->ctx->extra_certs); i++)
 372                 {
 373                 x=sk_X509_value(s->ctx->extra_certs,i);
 374                 if (ssl3_add_cert_to_buf(buf, &l, x))
 375                         return(0);
 376                 }
 377
 378         l-=7;
 379         p=(unsigned char *)&(buf->data[4]);
 380         l2n3(l,p);
 381         l+=3;
 382         p=(unsigned char *)&(buf->data[0]);
 383         *(p++)=SSL3_MT_CERTIFICATE;
 384         l2n3(l,p);
 385         l+=4;
 386         return(l);
 387         }
 388
 389 /* Obtain handshake message of message type 'mt' (any if mt == -1),
 390  * maximum acceptable body length 'max'.
 391  * The first four bytes (msg_type and length) are read in state 'st1',
 392  * the body is read in state 'stn'.
 393  */
 394 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int *ok)
 395         {
 396         unsigned char *p;
 397         unsigned long l;
 398         long n;
 399         int i,al;
 400
 401         if (s->s3->tmp.reuse_message)
 402                 {
 403                 s->s3->tmp.reuse_message=0;
 404                 if ((mt >= 0) && (s->s3->tmp.message_type != mt))
 405                         {
 406                         al=SSL_AD_UNEXPECTED_MESSAGE;
 407                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
 408                         goto f_err;
 409                         }
 410                 *ok=1;
 411                 s->init_msg = s->init_buf->data + 4;
 412                 s->init_num = (int)s->s3->tmp.message_size;
 413                 return s->init_num;
 414                 }
 415
 416         p=(unsigned char *)s->init_buf->data;
 417
 418         if (s->state == st1) /* s->init_num < 4 */
 419                 {
 420                 int skip_message;
 421
 422                 do
 423                         {
 424                         while (s->init_num < 4)
 425                                 {
 426                                 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
 427                                         &p[s->init_num],4 - s->init_num, 0);
 428                                 if (i <= 0)
 429                                         {
 430                                         s->rwstate=SSL_READING;
 431                                         *ok = 0;
 432                                         return i;
 433                                         }
 434                                 s->init_num+=i;
 435                                 }
 436
 437                         skip_message = 0;
 438                         if (!s->server)
 439                                 if (p[0] == SSL3_MT_HELLO_REQUEST)
 440                                         /* The server may always send 'Hello Request' messages --
 441                                          * we are doing a handshake anyway now, so ignore them
 442                                          * if their format is correct. Does not count for
 443                                          * 'Finished' MAC. */
 444                                         if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
 445                                                 {
 446                                                 s->init_num = 0;
 447                                                 skip_message = 1;
 448
 449                                                 if (s->msg_callback)
 450                                                         s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg);
 451                                                 }
 452                         }
 453                 while (skip_message);
 454
 455                 /* s->init_num == 4 */
 456
 457                 if ((mt >= 0) && (*p != mt))
 458                         {
 459                         al=SSL_AD_UNEXPECTED_MESSAGE;
 460                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_UNEXPECTED_MESSAGE);
 461                         goto f_err;
 462                         }
 463                 if ((mt < 0) && (*p == SSL3_MT_CLIENT_HELLO) &&
 464                                         (st1 == SSL3_ST_SR_CERT_A) &&
 465                                         (stn == SSL3_ST_SR_CERT_B))
 466                         {
 467                         /* At this point we have got an MS SGC second client
 468                          * hello (maybe we should always allow the client to
 469                          * start a new handshake?). We need to restart the mac.
 470                          * Don't increment {num,total}_renegotiations because
 471                          * we have not completed the handshake. */
 472                         ssl3_init_finished_mac(s);
 473                         }
 474
 475                 s->s3->tmp.message_type= *(p++);
 476
 477                 n2l3(p,l);
 478                 if (l > (unsigned long)max)
 479                         {
 480                         al=SSL_AD_ILLEGAL_PARAMETER;
 481                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
 482                         goto f_err;
 483                         }
 484                 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
 485                         {
 486                         al=SSL_AD_ILLEGAL_PARAMETER;
 487                         SSLerr(SSL_F_SSL3_GET_MESSAGE,SSL_R_EXCESSIVE_MESSAGE_SIZE);
 488                         goto f_err;
 489                         }
 490                 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4))
 491                         {
 492                         SSLerr(SSL_F_SSL3_GET_MESSAGE,ERR_R_BUF_LIB);
 493                         goto err;
 494                         }
 495                 s->s3->tmp.message_size=l;
 496                 s->state=stn;
 497
 498                 s->init_msg = s->init_buf->data + 4;
 499                 s->init_num = 0;
 500                 }
 501
 502         /* next state (stn) */
 503         p = s->init_msg;
 504         n = s->s3->tmp.message_size - s->init_num;
 505         while (n > 0)
 506                 {
 507                 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
 508                 if (i <= 0)
 509                         {
 510                         s->rwstate=SSL_READING;
 511                         *ok = 0;
 512                         return i;
 513                         }
 514                 s->init_num += i;
 515                 n -= i;
 516                 }
 517         ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
 518         if (s->msg_callback)
 519                 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
 520         *ok=1;
 521         return s->init_num;
 522 f_err:
 523         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 524 err:
 525         *ok=0;
 526         return(-1);
 527         }
 528
 529 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
 530         {
 531         EVP_PKEY *pk;
 532         int ret= -1,i;
 533
 534         if (pkey == NULL)
 535                 pk=X509_get_pubkey(x);
 536         else
 537                 pk=pkey;
 538         if (pk == NULL) goto err;
 539
 540         i=pk->type;
 541         if (i == EVP_PKEY_RSA)
 542                 {
 543                 ret=SSL_PKEY_RSA_ENC;
 544                 }
 545         else if (i == EVP_PKEY_DSA)
 546                 {
 547                 ret=SSL_PKEY_DSA_SIGN;
 548                 }
 549 #ifndef OPENSSL_NO_EC
 550         else if (i == EVP_PKEY_EC)
 551                 {
 552                 ret = SSL_PKEY_ECC;
 553                 }
 554 #endif
 555
 556 err:
 557         if(!pkey) EVP_PKEY_free(pk);
 558         return(ret);
 559         }
 560
 561 int ssl_verify_alarm_type(long type)
 562         {
 563         int al;
 564
 565         switch(type)
 566                 {
 567         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
 568         case X509_V_ERR_UNABLE_TO_GET_CRL:
 569         case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
 570                 al=SSL_AD_UNKNOWN_CA;
 571                 break;
 572         case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
 573         case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
 574         case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
 575         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
 576         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
 577         case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
 578         case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
 579         case X509_V_ERR_CERT_NOT_YET_VALID:
 580         case X509_V_ERR_CRL_NOT_YET_VALID:
 581         case X509_V_ERR_CERT_UNTRUSTED:
 582         case X509_V_ERR_CERT_REJECTED:
 583                 al=SSL_AD_BAD_CERTIFICATE;
 584                 break;
 585         case X509_V_ERR_CERT_SIGNATURE_FAILURE:
 586         case X509_V_ERR_CRL_SIGNATURE_FAILURE:
 587                 al=SSL_AD_DECRYPT_ERROR;
 588                 break;
 589         case X509_V_ERR_CERT_HAS_EXPIRED:
 590         case X509_V_ERR_CRL_HAS_EXPIRED:
 591                 al=SSL_AD_CERTIFICATE_EXPIRED;
 592                 break;
 593         case X509_V_ERR_CERT_REVOKED:
 594                 al=SSL_AD_CERTIFICATE_REVOKED;
 595                 break;
 596         case X509_V_ERR_OUT_OF_MEM:
 597                 al=SSL_AD_INTERNAL_ERROR;
 598                 break;
 599         case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
 600         case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
 601         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
 602         case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
 603         case X509_V_ERR_CERT_CHAIN_TOO_LONG:
 604         case X509_V_ERR_PATH_LENGTH_EXCEEDED:
 605         case X509_V_ERR_INVALID_CA:
 606                 al=SSL_AD_UNKNOWN_CA;
 607                 break;
 608         case X509_V_ERR_APPLICATION_VERIFICATION:
 609                 al=SSL_AD_HANDSHAKE_FAILURE;
 610                 break;
 611         case X509_V_ERR_INVALID_PURPOSE:
 612                 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
 613                 break;
 614         default:
 615                 al=SSL_AD_CERTIFICATE_UNKNOWN;
 616                 break;
 617                 }
 618         return(al);
 619         }
 620
 621 int ssl3_setup_buffers(SSL *s)
 622         {
 623         unsigned char *p;
 624         unsigned int extra,headerlen;
 625         size_t len;
 626
 627         if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
 628                 headerlen = DTLS1_RT_HEADER_LENGTH;
 629         else
 630                 headerlen = SSL3_RT_HEADER_LENGTH;
 631
 632         if (s->s3->rbuf.buf == NULL)
 633                 {
 634                 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
 635                         extra=SSL3_RT_MAX_EXTRA;
 636                 else
 637                         extra=0;
 638                 len = SSL3_RT_MAX_PACKET_SIZE + extra;
 639                 if ((p=OPENSSL_malloc(len)) == NULL)
 640                         goto err;
 641                 s->s3->rbuf.buf = p;
 642                 s->s3->rbuf.len = len;
 643                 }
 644
 645         if (s->s3->wbuf.buf == NULL)
 646                 {
 647                 len = SSL3_RT_MAX_PACKET_SIZE;
 648                 len += headerlen + 256; /* extra space for empty fragment */
 649                 if ((p=OPENSSL_malloc(len)) == NULL)
 650                         goto err;
 651                 s->s3->wbuf.buf = p;
 652                 s->s3->wbuf.len = len;
 653                 }
 654         s->packet= &(s->s3->rbuf.buf[0]);
 655         return(1);
 656 err:
 657         SSLerr(SSL_F_SSL3_SETUP_BUFFERS,ERR_R_MALLOC_FAILURE);
 658         return(0);
 659         }