src/third_party/boringssl/src/ssl/s3_both.c

   1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   2  * All rights reserved.
   3  *
   4  * This package is an SSL implementation written
   5  * by Eric Young (eay@cryptsoft.com).
   6  * The implementation was written so as to conform with Netscapes SSL.
   7  *
   8  * This library is free for commercial and non-commercial use as long as
   9  * the following conditions are aheared to.  The following conditions
  10  * apply to all code found in this distribution, be it the RC4, RSA,
  11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  12  * included with this distribution is covered by the same copyright terms
  13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  14  *
  15  * Copyright remains Eric Young's, and as such any Copyright notices in
  16  * the code are not to be removed.
  17  * If this package is used in a product, Eric Young should be given attribution
  18  * as the author of the parts of the library used.
  19  * This can be in the form of a textual message at program startup or
  20  * in documentation (online or textual) provided with the package.
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  25  * 1. Redistributions of source code must retain the copyright
  26  *    notice, this list of conditions and the following disclaimer.
  27  * 2. Redistributions in binary form must reproduce the above copyright
  28  *    notice, this list of conditions and the following disclaimer in the
  29  *    documentation and/or other materials provided with the distribution.
  30  * 3. All advertising materials mentioning features or use of this software
  31  *    must display the following acknowledgement:
  32  *    "This product includes cryptographic software written by
  33  *     Eric Young (eay@cryptsoft.com)"
  34  *    The word 'cryptographic' can be left out if the rouines from the library
  35  *    being used are not cryptographic related :-).
  36  * 4. If you include any Windows specific code (or a derivative thereof) from
  37  *    the apps directory (application code) you must include an acknowledgement:
  38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  * The licence and distribution terms for any publically available version or
  53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  54  * copied and put under another distribution licence
  55  * [including the GNU Public Licence.]
  56  */
  57 /* ====================================================================
  58  * Copyright (c) 1998-2002 The OpenSSL Project.  All rights reserved.
  59  *
  60  * Redistribution and use in source and binary forms, with or without
  61  * modification, are permitted provided that the following conditions
  62  * are met:
  63  *
  64  * 1. Redistributions of source code must retain the above copyright
  65  *    notice, this list of conditions and the following disclaimer.
  66  *
  67  * 2. Redistributions in binary form must reproduce the above copyright
  68  *    notice, this list of conditions and the following disclaimer in
  69  *    the documentation and/or other materials provided with the
  70  *    distribution.
  71  *
  72  * 3. All advertising materials mentioning features or use of this
  73  *    software must display the following acknowledgment:
  74  *    "This product includes software developed by the OpenSSL Project
  75  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
  76  *
  77  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  78  *    endorse or promote products derived from this software without
  79  *    prior written permission. For written permission, please contact
  80  *    openssl-core@openssl.org.
  81  *
  82  * 5. Products derived from this software may not be called "OpenSSL"
  83  *    nor may "OpenSSL" appear in their names without prior written
  84  *    permission of the OpenSSL Project.
  85  *
  86  * 6. Redistributions of any form whatsoever must retain the following
  87  *    acknowledgment:
  88  *    "This product includes software developed by the OpenSSL Project
  89  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
  90  *
  91  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  92  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  93  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  94  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  95  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  96  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  97  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  98  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  99  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 100  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 101  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 102  * OF THE POSSIBILITY OF SUCH DAMAGE.
 103  * ====================================================================
 104  *
 105  * This product includes cryptographic software written by Eric Young
 106  * (eay@cryptsoft.com).  This product includes software written by Tim
 107  * Hudson (tjh@cryptsoft.com). */
 108 /* ====================================================================
 109  * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
 110  * ECC cipher suite support in OpenSSL originally developed by
 111  * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. */
 112
 113 #include <assert.h>
 114 #include <limits.h>
 115 #include <stdio.h>
 116 #include <string.h>
 117
 118 #include <openssl/buf.h>
 119 #include <openssl/evp.h>
 120 #include <openssl/mem.h>
 121 #include <openssl/obj.h>
 122 #include <openssl/rand.h>
 123 #include <openssl/x509.h>
 124
 125 #include "ssl_locl.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;
 154         int i;
 155         unsigned long l;
 156
 157         if (s->state == a)
 158                 {
 159                 p = ssl_handshake_start(s);
 160
 161                 i=s->method->ssl3_enc->final_finish_mac(s,
 162                         sender,slen,s->s3->tmp.finish_md);
 163                 if (i == 0)
 164                         return 0;
 165                 s->s3->tmp.finish_md_len = i;
 166                 memcpy(p, s->s3->tmp.finish_md, i);
 167                 l=i;
 168
 169                 /* Copy the finished so we can use it for
 170                    renegotiation checks */
 171                 if(s->type == SSL_ST_CONNECT)
 172                         {
 173                          assert(i <= EVP_MAX_MD_SIZE);
 174                          memcpy(s->s3->previous_client_finished,
 175                              s->s3->tmp.finish_md, i);
 176                          s->s3->previous_client_finished_len=i;
 177                         }
 178                 else
 179                         {
 180                         assert(i <= EVP_MAX_MD_SIZE);
 181                         memcpy(s->s3->previous_server_finished,
 182                             s->s3->tmp.finish_md, i);
 183                         s->s3->previous_server_finished_len=i;
 184                         }
 185
 186 #ifdef OPENSSL_SYS_WIN16
 187                 /* MSVC 1.5 does not clear the top bytes of the word unless
 188                  * I do this.
 189                  */
 190                 l&=0xffff;
 191 #endif
 192                 ssl_set_handshake_header(s, SSL3_MT_FINISHED, l);
 193                 s->state=b;
 194                 }
 195
 196         /* SSL3_ST_SEND_xxxxxx_HELLO_B */
 197         return ssl_do_write(s);
 198         }
 199
 200 #ifndef OPENSSL_NO_NEXTPROTONEG
 201 /* ssl3_take_mac calculates the Finished MAC for the handshakes messages seen to far. */
 202 static void ssl3_take_mac(SSL *s)
 203         {
 204         const char *sender;
 205         int slen;
 206         /* If no new cipher setup return immediately: other functions will
 207          * set the appropriate error.
 208          */
 209         if (s->s3->tmp.new_cipher == NULL)
 210                 return;
 211         if (s->state & SSL_ST_CONNECT)
 212                 {
 213                 sender=s->method->ssl3_enc->server_finished_label;
 214                 slen=s->method->ssl3_enc->server_finished_label_len;
 215                 }
 216         else
 217                 {
 218                 sender=s->method->ssl3_enc->client_finished_label;
 219                 slen=s->method->ssl3_enc->client_finished_label_len;
 220                 }
 221
 222         s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
 223                 sender,slen,s->s3->tmp.peer_finish_md);
 224         }
 225 #endif
 226
 227 int ssl3_get_finished(SSL *s, int a, int b)
 228         {
 229         int al,i,ok;
 230         long n;
 231         unsigned char *p;
 232
 233 #ifdef OPENSSL_NO_NEXTPROTONEG
 234         /* the mac has already been generated when we received the
 235          * change cipher spec message and is in s->s3->tmp.peer_finish_md
 236          */
 237 #endif
 238
 239         n=s->method->ssl_get_message(s,
 240                 a,
 241                 b,
 242                 SSL3_MT_FINISHED,
 243                 64, /* should actually be 36+4 :-) */
 244                 &ok);
 245
 246         if (!ok) return((int)n);
 247
 248         /* If this occurs, we have missed a message.
 249          * TODO(davidben): Is this check now redundant with
 250          * SSL3_FLAGS_EXPECT_CCS? */
 251         if (!s->s3->change_cipher_spec)
 252                 {
 253                 al=SSL_AD_UNEXPECTED_MESSAGE;
 254                 OPENSSL_PUT_ERROR(SSL, ssl3_get_finished, SSL_R_GOT_A_FIN_BEFORE_A_CCS);
 255                 goto f_err;
 256                 }
 257         s->s3->change_cipher_spec=0;
 258
 259         p = s->init_msg;
 260         i = s->s3->tmp.peer_finish_md_len;
 261
 262         if (i != n)
 263                 {
 264                 al=SSL_AD_DECODE_ERROR;
 265                 OPENSSL_PUT_ERROR(SSL, ssl3_get_finished, SSL_R_BAD_DIGEST_LENGTH);
 266                 goto f_err;
 267                 }
 268
 269         if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
 270                 {
 271                 al=SSL_AD_DECRYPT_ERROR;
 272                 OPENSSL_PUT_ERROR(SSL, ssl3_get_finished, SSL_R_DIGEST_CHECK_FAILED);
 273                 goto f_err;
 274                 }
 275
 276         /* Copy the finished so we can use it for
 277            renegotiation checks */
 278         if(s->type == SSL_ST_ACCEPT)
 279                 {
 280                 assert(i <= EVP_MAX_MD_SIZE);
 281                 memcpy(s->s3->previous_client_finished,
 282                     s->s3->tmp.peer_finish_md, i);
 283                 s->s3->previous_client_finished_len=i;
 284                 }
 285         else
 286                 {
 287                 assert(i <= EVP_MAX_MD_SIZE);
 288                 memcpy(s->s3->previous_server_finished,
 289                     s->s3->tmp.peer_finish_md, i);
 290                 s->s3->previous_server_finished_len=i;
 291                 }
 292
 293         return(1);
 294 f_err:
 295         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 296         return(0);
 297         }
 298
 299 /* for these 2 messages, we need to
 300  * ssl->enc_read_ctx                    re-init
 301  * ssl->s3->read_sequence               zero
 302  * ssl->s3->read_mac_secret             re-init
 303  * ssl->session->read_sym_enc           assign
 304  * ssl->session->read_compression       assign
 305  * ssl->session->read_hash              assign
 306  */
 307 int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
 308         {
 309         unsigned char *p;
 310
 311         if (s->state == a)
 312                 {
 313                 p=(unsigned char *)s->init_buf->data;
 314                 *p=SSL3_MT_CCS;
 315                 s->init_num=1;
 316                 s->init_off=0;
 317
 318                 s->state=b;
 319                 }
 320
 321         /* SSL3_ST_CW_CHANGE_B */
 322         return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC));
 323         }
 324
 325 unsigned long ssl3_output_cert_chain(SSL *s, CERT_PKEY *cpk)
 326         {
 327         unsigned char *p;
 328         unsigned long l = 3 + SSL_HM_HEADER_LENGTH(s);
 329
 330         if (!ssl_add_cert_chain(s, cpk, &l))
 331                 return 0;
 332
 333         l -= 3 + SSL_HM_HEADER_LENGTH(s);
 334         p = ssl_handshake_start(s);
 335         l2n3(l,p);
 336         l += 3;
 337         ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE, l);
 338         return l + SSL_HM_HEADER_LENGTH(s);
 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                         OPENSSL_PUT_ERROR(SSL, ssl3_get_message, SSL_R_UNEXPECTED_MESSAGE);
 360                         goto f_err;
 361                         }
 362                 *ok=1;
 363                 s->init_msg = (uint8_t*)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=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
 379                                         &p[s->init_num],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                         OPENSSL_PUT_ERROR(SSL, 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                         OPENSSL_PUT_ERROR(SSL, 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                         OPENSSL_PUT_ERROR(SSL, ssl3_get_message, SSL_R_EXCESSIVE_MESSAGE_SIZE);
 440                         goto f_err;
 441                         }
 442                 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4))
 443                         {
 444                         OPENSSL_PUT_ERROR(SSL, 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 = (uint8_t*)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=s->method->ssl_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
 470 #ifndef OPENSSL_NO_NEXTPROTONEG
 471         /* If receiving Finished, record MAC of prior handshake messages for
 472          * Finished verification. */
 473         if (*s->init_buf->data == SSL3_MT_FINISHED)
 474                 ssl3_take_mac(s);
 475 #endif
 476
 477         /* Feed this message into MAC computation. */
 478         if (*((unsigned char*) s->init_buf->data) != SSL3_MT_ENCRYPTED_EXTENSIONS)
 479                 ssl3_finish_mac(s, (unsigned char *)s->init_buf->data, s->init_num + 4);
 480         if (s->msg_callback)
 481                 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
 482         *ok=1;
 483         return s->init_num;
 484 f_err:
 485         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 486 err:
 487         *ok=0;
 488         return(-1);
 489         }
 490
 491 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
 492         {
 493         EVP_PKEY *pk;
 494         int ret= -1,i;
 495
 496         if (pkey == NULL)
 497                 pk=X509_get_pubkey(x);
 498         else
 499                 pk=pkey;
 500         if (pk == NULL) goto err;
 501
 502         i=pk->type;
 503         if (i == EVP_PKEY_RSA)
 504                 {
 505                 ret=SSL_PKEY_RSA_ENC;
 506                 }
 507         else if (i == EVP_PKEY_DSA)
 508                 {
 509                 ret=SSL_PKEY_DSA_SIGN;
 510                 }
 511 #ifndef OPENSSL_NO_EC
 512         else if (i == EVP_PKEY_EC)
 513                 {
 514                 ret = SSL_PKEY_ECC;
 515                 }
 516 #endif
 517         else if (x && (i == EVP_PKEY_DH || i == EVP_PKEY_DHX))
 518                 {
 519                 /* For DH two cases: DH certificate signed with RSA and
 520                  * DH certificate signed with DSA.
 521                  */
 522                 i = X509_certificate_type(x, pk);
 523                 if (i & EVP_PKS_RSA)
 524                         ret = SSL_PKEY_DH_RSA;
 525                 else if (i & EVP_PKS_DSA)
 526                         ret = SSL_PKEY_DH_DSA;
 527                 }
 528
 529 err:
 530         if(!pkey) EVP_PKEY_free(pk);
 531         return(ret);
 532         }
 533
 534 int ssl_verify_alarm_type(long type)
 535         {
 536         int al;
 537
 538         switch(type)
 539                 {
 540         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
 541         case X509_V_ERR_UNABLE_TO_GET_CRL:
 542         case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
 543                 al=SSL_AD_UNKNOWN_CA;
 544                 break;
 545         case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
 546         case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
 547         case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
 548         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
 549         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
 550         case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
 551         case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
 552         case X509_V_ERR_CERT_NOT_YET_VALID:
 553         case X509_V_ERR_CRL_NOT_YET_VALID:
 554         case X509_V_ERR_CERT_UNTRUSTED:
 555         case X509_V_ERR_CERT_REJECTED:
 556                 al=SSL_AD_BAD_CERTIFICATE;
 557                 break;
 558         case X509_V_ERR_CERT_SIGNATURE_FAILURE:
 559         case X509_V_ERR_CRL_SIGNATURE_FAILURE:
 560                 al=SSL_AD_DECRYPT_ERROR;
 561                 break;
 562         case X509_V_ERR_CERT_HAS_EXPIRED:
 563         case X509_V_ERR_CRL_HAS_EXPIRED:
 564                 al=SSL_AD_CERTIFICATE_EXPIRED;
 565                 break;
 566         case X509_V_ERR_CERT_REVOKED:
 567                 al=SSL_AD_CERTIFICATE_REVOKED;
 568                 break;
 569         case X509_V_ERR_OUT_OF_MEM:
 570                 al=SSL_AD_INTERNAL_ERROR;
 571                 break;
 572         case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
 573         case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
 574         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
 575         case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
 576         case X509_V_ERR_CERT_CHAIN_TOO_LONG:
 577         case X509_V_ERR_PATH_LENGTH_EXCEEDED:
 578         case X509_V_ERR_INVALID_CA:
 579                 al=SSL_AD_UNKNOWN_CA;
 580                 break;
 581         case X509_V_ERR_APPLICATION_VERIFICATION:
 582                 al=SSL_AD_HANDSHAKE_FAILURE;
 583                 break;
 584         case X509_V_ERR_INVALID_PURPOSE:
 585                 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
 586                 break;
 587         default:
 588                 al=SSL_AD_CERTIFICATE_UNKNOWN;
 589                 break;
 590                 }
 591         return(al);
 592         }
 593
 594 int ssl3_setup_read_buffer(SSL *s)
 595         {
 596         unsigned char *p;
 597         size_t len,align=0,headerlen;
 598
 599         if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
 600                 headerlen = DTLS1_RT_HEADER_LENGTH;
 601         else
 602                 headerlen = SSL3_RT_HEADER_LENGTH;
 603
 604 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
 605         align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
 606 #endif
 607
 608         if (s->s3->rbuf.buf == NULL)
 609                 {
 610                 len = SSL3_RT_MAX_PLAIN_LENGTH
 611                         + SSL3_RT_MAX_ENCRYPTED_OVERHEAD
 612                         + headerlen + align;
 613                 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
 614                         {
 615                         s->s3->init_extra = 1;
 616                         len += SSL3_RT_MAX_EXTRA;
 617                         }
 618                 if ((p=OPENSSL_malloc(len)) == NULL)
 619                         goto err;
 620                 s->s3->rbuf.buf = p;
 621                 s->s3->rbuf.len = len;
 622                 }
 623
 624         s->packet= &(s->s3->rbuf.buf[0]);
 625         return 1;
 626
 627 err:
 628         OPENSSL_PUT_ERROR(SSL, ssl3_setup_read_buffer, ERR_R_MALLOC_FAILURE);
 629         return 0;
 630         }
 631
 632 int ssl3_setup_write_buffer(SSL *s)
 633         {
 634         unsigned char *p;
 635         size_t len,align=0,headerlen;
 636
 637         if (SSL_version(s) == DTLS1_VERSION || SSL_version(s) == DTLS1_BAD_VER)
 638                 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
 639         else
 640                 headerlen = SSL3_RT_HEADER_LENGTH;
 641
 642 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
 643         align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
 644 #endif
 645
 646         if (s->s3->wbuf.buf == NULL)
 647                 {
 648                 len = s->max_send_fragment
 649                         + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD
 650                         + headerlen + align;
 651                 if (!(s->options & SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS))
 652                         len += headerlen + align
 653                                 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
 654
 655                 if ((p=OPENSSL_malloc(len)) == NULL)
 656                         goto err;
 657                 s->s3->wbuf.buf = p;
 658                 s->s3->wbuf.len = len;
 659                 }
 660
 661         return 1;
 662
 663 err:
 664         OPENSSL_PUT_ERROR(SSL, ssl3_setup_write_buffer, ERR_R_MALLOC_FAILURE);
 665         return 0;
 666         }
 667
 668
 669 int ssl3_setup_buffers(SSL *s)
 670         {
 671         if (!ssl3_setup_read_buffer(s))
 672                 return 0;
 673         if (!ssl3_setup_write_buffer(s))
 674                 return 0;
 675         return 1;
 676         }
 677
 678 int ssl3_release_write_buffer(SSL *s)
 679         {
 680         if (s->s3->wbuf.buf != NULL)
 681                 {
 682                 OPENSSL_free(s->s3->wbuf.buf);
 683                 s->s3->wbuf.buf = NULL;
 684                 }
 685         return 1;
 686         }
 687
 688 int ssl3_release_read_buffer(SSL *s)
 689         {
 690         if (s->s3->rbuf.buf != NULL)
 691                 {
 692                 OPENSSL_free(s->s3->rbuf.buf);
 693                 s->s3->rbuf.buf = NULL;
 694                 }
 695         return 1;
 696         }
 697