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/md5.h>
 122 #include <openssl/obj.h>
 123 #include <openssl/rand.h>
 124 #include <openssl/sha.h>
 125 #include <openssl/x509.h>
 126
 127 #include "ssl_locl.h"
 128
 129 /* send s->init_buf in records of type 'type' (SSL3_RT_HANDSHAKE or SSL3_RT_CHANGE_CIPHER_SPEC) */
 130 int ssl3_do_write(SSL *s, int type, enum should_add_to_finished_hash should_add_to_finished_hash)
 131         {
 132         int ret;
 133
 134         ret=ssl3_write_bytes(s,type,&s->init_buf->data[s->init_off],
 135                              s->init_num);
 136         if (ret < 0) return(-1);
 137         if (type == SSL3_RT_HANDSHAKE && should_add_to_finished_hash == add_to_finished_hash)
 138                 {
 139                 /* should not be done for 'Hello Request's, but in that case
 140                  * we'll ignore the result anyway */
 141                 ssl3_finish_mac(s,(unsigned char *)&s->init_buf->data[s->init_off],ret);
 142                 }
 143
 144         if (ret == s->init_num)
 145                 {
 146                 if (s->msg_callback)
 147                         s->msg_callback(1, s->version, type, s->init_buf->data, (size_t)(s->init_off + s->init_num), s, s->msg_callback_arg);
 148                 return(1);
 149                 }
 150         s->init_off+=ret;
 151         s->init_num-=ret;
 152         return(0);
 153         }
 154
 155 int ssl3_send_finished(SSL *s, int a, int b, const char *sender, int slen)
 156         {
 157         unsigned char *p;
 158         int i;
 159         unsigned long l;
 160
 161         if (s->state == a)
 162                 {
 163                 p = ssl_handshake_start(s);
 164
 165                 i=s->method->ssl3_enc->final_finish_mac(s,
 166                         sender,slen,s->s3->tmp.finish_md);
 167                 if (i == 0)
 168                         return 0;
 169                 s->s3->tmp.finish_md_len = i;
 170                 memcpy(p, s->s3->tmp.finish_md, i);
 171                 l=i;
 172
 173                 /* Log the master secret, if logging is enabled. */
 174                 if (!ssl_ctx_log_master_secret(s->ctx,
 175                                 s->s3->client_random, SSL3_RANDOM_SIZE,
 176                                 s->session->master_key, s->session->master_key_length))
 177                         {
 178                         return 0;
 179                         }
 180
 181                 /* Copy the finished so we can use it for
 182                    renegotiation checks */
 183                 if(s->type == SSL_ST_CONNECT)
 184                         {
 185                          assert(i <= EVP_MAX_MD_SIZE);
 186                          memcpy(s->s3->previous_client_finished,
 187                              s->s3->tmp.finish_md, i);
 188                          s->s3->previous_client_finished_len=i;
 189                         }
 190                 else
 191                         {
 192                         assert(i <= EVP_MAX_MD_SIZE);
 193                         memcpy(s->s3->previous_server_finished,
 194                             s->s3->tmp.finish_md, i);
 195                         s->s3->previous_server_finished_len=i;
 196                         }
 197
 198                 ssl_set_handshake_header(s, SSL3_MT_FINISHED, l);
 199                 s->state=b;
 200                 }
 201
 202         /* SSL3_ST_SEND_xxxxxx_HELLO_B */
 203         return ssl_do_write(s);
 204         }
 205
 206 /* ssl3_take_mac calculates the Finished MAC for the handshakes messages seen to far. */
 207 static void ssl3_take_mac(SSL *s)
 208         {
 209         const char *sender;
 210         int slen;
 211         /* If no new cipher setup return immediately: other functions will
 212          * set the appropriate error.
 213          */
 214         if (s->s3->tmp.new_cipher == NULL)
 215                 return;
 216         if (s->state & SSL_ST_CONNECT)
 217                 {
 218                 sender=s->method->ssl3_enc->server_finished_label;
 219                 slen=s->method->ssl3_enc->server_finished_label_len;
 220                 }
 221         else
 222                 {
 223                 sender=s->method->ssl3_enc->client_finished_label;
 224                 slen=s->method->ssl3_enc->client_finished_label_len;
 225                 }
 226
 227         s->s3->tmp.peer_finish_md_len = s->method->ssl3_enc->final_finish_mac(s,
 228                 sender,slen,s->s3->tmp.peer_finish_md);
 229         }
 230
 231 int ssl3_get_finished(SSL *s, int a, int b)
 232         {
 233         int al,i,ok;
 234         long n;
 235         unsigned char *p;
 236
 237         n=s->method->ssl_get_message(s,
 238                 a,
 239                 b,
 240                 SSL3_MT_FINISHED,
 241                 64, /* should actually be 36+4 :-) */
 242                 SSL_GET_MESSAGE_DONT_HASH_MESSAGE,
 243                 &ok);
 244
 245         if (!ok) return((int)n);
 246
 247         /* Snapshot the finished hash before incorporating the new message. */
 248         ssl3_take_mac(s);
 249         ssl3_hash_current_message(s);
 250
 251         /* If this occurs, we have missed a message.
 252          * TODO(davidben): Is this check now redundant with
 253          * SSL3_FLAGS_EXPECT_CCS? */
 254         if (!s->s3->change_cipher_spec)
 255                 {
 256                 al=SSL_AD_UNEXPECTED_MESSAGE;
 257                 OPENSSL_PUT_ERROR(SSL, ssl3_get_finished, SSL_R_GOT_A_FIN_BEFORE_A_CCS);
 258                 goto f_err;
 259                 }
 260         s->s3->change_cipher_spec=0;
 261
 262         p = s->init_msg;
 263         i = s->s3->tmp.peer_finish_md_len;
 264
 265         if (i != n)
 266                 {
 267                 al=SSL_AD_DECODE_ERROR;
 268                 OPENSSL_PUT_ERROR(SSL, ssl3_get_finished, SSL_R_BAD_DIGEST_LENGTH);
 269                 goto f_err;
 270                 }
 271
 272         if (CRYPTO_memcmp(p, s->s3->tmp.peer_finish_md, i) != 0)
 273                 {
 274                 al=SSL_AD_DECRYPT_ERROR;
 275                 OPENSSL_PUT_ERROR(SSL, ssl3_get_finished, SSL_R_DIGEST_CHECK_FAILED);
 276                 goto f_err;
 277                 }
 278
 279         /* Copy the finished so we can use it for
 280            renegotiation checks */
 281         if(s->type == SSL_ST_ACCEPT)
 282                 {
 283                 assert(i <= EVP_MAX_MD_SIZE);
 284                 memcpy(s->s3->previous_client_finished,
 285                     s->s3->tmp.peer_finish_md, i);
 286                 s->s3->previous_client_finished_len=i;
 287                 }
 288         else
 289                 {
 290                 assert(i <= EVP_MAX_MD_SIZE);
 291                 memcpy(s->s3->previous_server_finished,
 292                     s->s3->tmp.peer_finish_md, i);
 293                 s->s3->previous_server_finished_len=i;
 294                 }
 295
 296         return(1);
 297 f_err:
 298         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 299         return(0);
 300         }
 301
 302 /* for these 2 messages, we need to
 303  * ssl->enc_read_ctx                    re-init
 304  * ssl->s3->read_sequence               zero
 305  * ssl->s3->read_mac_secret             re-init
 306  * ssl->session->read_sym_enc           assign
 307  * ssl->session->read_compression       assign
 308  * ssl->session->read_hash              assign
 309  */
 310 int ssl3_send_change_cipher_spec(SSL *s, int a, int b)
 311         {
 312         unsigned char *p;
 313
 314         if (s->state == a)
 315                 {
 316                 p=(unsigned char *)s->init_buf->data;
 317                 *p=SSL3_MT_CCS;
 318                 s->init_num=1;
 319                 s->init_off=0;
 320
 321                 s->state=b;
 322                 }
 323
 324         /* SSL3_ST_CW_CHANGE_B */
 325         return(ssl3_do_write(s,SSL3_RT_CHANGE_CIPHER_SPEC, dont_add_to_finished_hash));
 326         }
 327
 328 unsigned long ssl3_output_cert_chain(SSL *s, CERT_PKEY *cpk)
 329         {
 330         unsigned char *p;
 331         unsigned long l = 3 + SSL_HM_HEADER_LENGTH(s);
 332
 333         if (!ssl_add_cert_chain(s, cpk, &l))
 334                 return 0;
 335
 336         l -= 3 + SSL_HM_HEADER_LENGTH(s);
 337         p = ssl_handshake_start(s);
 338         l2n3(l,p);
 339         l += 3;
 340         ssl_set_handshake_header(s, SSL3_MT_CERTIFICATE, l);
 341         return l + SSL_HM_HEADER_LENGTH(s);
 342         }
 343
 344 /* Obtain handshake message of message type 'mt' (any if mt == -1),
 345  * maximum acceptable body length 'max'.
 346  * The first four bytes (msg_type and length) are read in state 'st1',
 347  * the body is read in state 'stn'.
 348  */
 349 long ssl3_get_message(SSL *s, int st1, int stn, int mt, long max, int hash_message, int *ok)
 350         {
 351         unsigned char *p;
 352         unsigned long l;
 353         long n;
 354         int i,al;
 355
 356         if (s->s3->tmp.reuse_message)
 357                 {
 358                 /* A SSL_GET_MESSAGE_DONT_HASH_MESSAGE call cannot be combined
 359                  * with reuse_message; the SSL_GET_MESSAGE_DONT_HASH_MESSAGE
 360                  * would have to have been applied to the previous call. */
 361                 assert(hash_message != SSL_GET_MESSAGE_DONT_HASH_MESSAGE);
 362                 s->s3->tmp.reuse_message=0;
 363                 if ((mt >= 0) && (s->s3->tmp.message_type != mt))
 364                         {
 365                         al=SSL_AD_UNEXPECTED_MESSAGE;
 366                         OPENSSL_PUT_ERROR(SSL, ssl3_get_message, SSL_R_UNEXPECTED_MESSAGE);
 367                         goto f_err;
 368                         }
 369                 *ok=1;
 370                 s->init_msg = (uint8_t*)s->init_buf->data + 4;
 371                 s->init_num = (int)s->s3->tmp.message_size;
 372                 return s->init_num;
 373                 }
 374
 375         p=(unsigned char *)s->init_buf->data;
 376
 377         if (s->state == st1) /* s->init_num < 4 */
 378                 {
 379                 int skip_message;
 380
 381                 do
 382                         {
 383                         while (s->init_num < 4)
 384                                 {
 385                                 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,
 386                                         &p[s->init_num],4 - s->init_num, 0);
 387                                 if (i <= 0)
 388                                         {
 389                                         s->rwstate=SSL_READING;
 390                                         *ok = 0;
 391                                         return i;
 392                                         }
 393                                 s->init_num+=i;
 394                                 }
 395
 396                         skip_message = 0;
 397                         if (!s->server)
 398                                 if (p[0] == SSL3_MT_HELLO_REQUEST)
 399                                         /* The server may always send 'Hello Request' messages --
 400                                          * we are doing a handshake anyway now, so ignore them
 401                                          * if their format is correct. Does not count for
 402                                          * 'Finished' MAC. */
 403                                         if (p[1] == 0 && p[2] == 0 &&p[3] == 0)
 404                                                 {
 405                                                 s->init_num = 0;
 406                                                 skip_message = 1;
 407
 408                                                 if (s->msg_callback)
 409                                                         s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, p, 4, s, s->msg_callback_arg);
 410                                                 }
 411                         }
 412                 while (skip_message);
 413
 414                 /* s->init_num == 4 */
 415
 416                 if ((mt >= 0) && (*p != mt))
 417                         {
 418                         al=SSL_AD_UNEXPECTED_MESSAGE;
 419                         OPENSSL_PUT_ERROR(SSL, ssl3_get_message, SSL_R_UNEXPECTED_MESSAGE);
 420                         goto f_err;
 421                         }
 422                 s->s3->tmp.message_type= *(p++);
 423
 424                 n2l3(p,l);
 425                 if (l > (unsigned long)max)
 426                         {
 427                         al=SSL_AD_ILLEGAL_PARAMETER;
 428                         OPENSSL_PUT_ERROR(SSL, ssl3_get_message, SSL_R_EXCESSIVE_MESSAGE_SIZE);
 429                         goto f_err;
 430                         }
 431                 if (l > (INT_MAX-4)) /* BUF_MEM_grow takes an 'int' parameter */
 432                         {
 433                         al=SSL_AD_ILLEGAL_PARAMETER;
 434                         OPENSSL_PUT_ERROR(SSL, ssl3_get_message, SSL_R_EXCESSIVE_MESSAGE_SIZE);
 435                         goto f_err;
 436                         }
 437                 if (l && !BUF_MEM_grow_clean(s->init_buf,(int)l+4))
 438                         {
 439                         OPENSSL_PUT_ERROR(SSL, ssl3_get_message, ERR_R_BUF_LIB);
 440                         goto err;
 441                         }
 442                 s->s3->tmp.message_size=l;
 443                 s->state=stn;
 444
 445                 s->init_msg = (uint8_t*)s->init_buf->data + 4;
 446                 s->init_num = 0;
 447                 }
 448
 449         /* next state (stn) */
 450         p = s->init_msg;
 451         n = s->s3->tmp.message_size - s->init_num;
 452         while (n > 0)
 453                 {
 454                 i=s->method->ssl_read_bytes(s,SSL3_RT_HANDSHAKE,&p[s->init_num],n,0);
 455                 if (i <= 0)
 456                         {
 457                         s->rwstate=SSL_READING;
 458                         *ok = 0;
 459                         return i;
 460                         }
 461                 s->init_num += i;
 462                 n -= i;
 463                 }
 464
 465         /* Feed this message into MAC computation. */
 466         if (hash_message != SSL_GET_MESSAGE_DONT_HASH_MESSAGE)
 467                 ssl3_hash_current_message(s);
 468         if (s->msg_callback)
 469                 s->msg_callback(0, s->version, SSL3_RT_HANDSHAKE, s->init_buf->data, (size_t)s->init_num + 4, s, s->msg_callback_arg);
 470         *ok=1;
 471         return s->init_num;
 472 f_err:
 473         ssl3_send_alert(s,SSL3_AL_FATAL,al);
 474 err:
 475         *ok=0;
 476         return(-1);
 477         }
 478
 479 void ssl3_hash_current_message(SSL *s)
 480         {
 481         /* The handshake header (different size between DTLS and TLS) is included in the hash. */
 482         size_t header_len = s->init_msg - (uint8_t *)s->init_buf->data;
 483         ssl3_finish_mac(s, (uint8_t *)s->init_buf->data, s->init_num + header_len);
 484         }
 485
 486 /* ssl3_cert_verify_hash is documented as needing EVP_MAX_MD_SIZE because that
 487  * is sufficient pre-TLS1.2 as well. */
 488 OPENSSL_COMPILE_ASSERT(EVP_MAX_MD_SIZE > MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH,
 489         combined_tls_hash_fits_in_max);
 490
 491 int ssl3_cert_verify_hash(SSL *s, uint8_t *out, size_t *out_len, const EVP_MD **out_md, EVP_PKEY *pkey)
 492         {
 493         /* For TLS v1.2 send signature algorithm and signature using
 494          * agreed digest and cached handshake records. Otherwise, use
 495          * SHA1 or MD5 + SHA1 depending on key type.  */
 496         if (SSL_USE_SIGALGS(s))
 497                 {
 498                 const uint8_t *hdata;
 499                 size_t hdatalen;
 500                 EVP_MD_CTX mctx;
 501                 unsigned len;
 502
 503                 if (!BIO_mem_contents(s->s3->handshake_buffer, &hdata, &hdatalen))
 504                         {
 505                         OPENSSL_PUT_ERROR(SSL, ssl3_cert_verify_hash, ERR_R_INTERNAL_ERROR);
 506                         return 0;
 507                         }
 508                 EVP_MD_CTX_init(&mctx);
 509                 if (!EVP_DigestInit_ex(&mctx, *out_md, NULL)
 510                         || !EVP_DigestUpdate(&mctx, hdata, hdatalen)
 511                         || !EVP_DigestFinal(&mctx, out, &len))
 512                         {
 513                         OPENSSL_PUT_ERROR(SSL, ssl3_cert_verify_hash, ERR_R_EVP_LIB);
 514                         EVP_MD_CTX_cleanup(&mctx);
 515                         return 0;
 516                         }
 517                 *out_len = len;
 518                 }
 519         else if (pkey->type == EVP_PKEY_RSA)
 520                 {
 521                 if (s->method->ssl3_enc->cert_verify_mac(s, NID_md5, out) == 0 ||
 522                         s->method->ssl3_enc->cert_verify_mac(s,
 523                                 NID_sha1, out + MD5_DIGEST_LENGTH) == 0)
 524                         return 0;
 525                 *out_len = MD5_DIGEST_LENGTH + SHA_DIGEST_LENGTH;
 526                 /* Using a NULL signature MD makes EVP_PKEY_sign perform
 527                  * a raw RSA signature, rather than wrapping in a
 528                  * DigestInfo. */
 529                 *out_md = NULL;
 530                 }
 531         else if (pkey->type == EVP_PKEY_EC)
 532                 {
 533                 if (s->method->ssl3_enc->cert_verify_mac(s, NID_sha1, out) == 0)
 534                         return 0;
 535                 *out_len = SHA_DIGEST_LENGTH;
 536                 *out_md = EVP_sha1();
 537                 }
 538         else
 539                 {
 540                 OPENSSL_PUT_ERROR(SSL, ssl3_cert_verify_hash, ERR_R_INTERNAL_ERROR);
 541                 return 0;
 542                 }
 543         return 1;
 544         }
 545
 546 int ssl_cert_type(X509 *x, EVP_PKEY *pkey)
 547         {
 548         EVP_PKEY *pk;
 549         int ret= -1,i;
 550
 551         if (pkey == NULL)
 552                 pk=X509_get_pubkey(x);
 553         else
 554                 pk=pkey;
 555         if (pk == NULL) goto err;
 556
 557         i=pk->type;
 558         if (i == EVP_PKEY_RSA)
 559                 {
 560                 ret=SSL_PKEY_RSA_ENC;
 561                 }
 562         else if (i == EVP_PKEY_EC)
 563                 {
 564                 ret = SSL_PKEY_ECC;
 565                 }
 566
 567 err:
 568         if(!pkey) EVP_PKEY_free(pk);
 569         return(ret);
 570         }
 571
 572 int ssl_verify_alarm_type(long type)
 573         {
 574         int al;
 575
 576         switch(type)
 577                 {
 578         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
 579         case X509_V_ERR_UNABLE_TO_GET_CRL:
 580         case X509_V_ERR_UNABLE_TO_GET_CRL_ISSUER:
 581                 al=SSL_AD_UNKNOWN_CA;
 582                 break;
 583         case X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE:
 584         case X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE:
 585         case X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY:
 586         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
 587         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
 588         case X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD:
 589         case X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD:
 590         case X509_V_ERR_CERT_NOT_YET_VALID:
 591         case X509_V_ERR_CRL_NOT_YET_VALID:
 592         case X509_V_ERR_CERT_UNTRUSTED:
 593         case X509_V_ERR_CERT_REJECTED:
 594                 al=SSL_AD_BAD_CERTIFICATE;
 595                 break;
 596         case X509_V_ERR_CERT_SIGNATURE_FAILURE:
 597         case X509_V_ERR_CRL_SIGNATURE_FAILURE:
 598                 al=SSL_AD_DECRYPT_ERROR;
 599                 break;
 600         case X509_V_ERR_CERT_HAS_EXPIRED:
 601         case X509_V_ERR_CRL_HAS_EXPIRED:
 602                 al=SSL_AD_CERTIFICATE_EXPIRED;
 603                 break;
 604         case X509_V_ERR_CERT_REVOKED:
 605                 al=SSL_AD_CERTIFICATE_REVOKED;
 606                 break;
 607         case X509_V_ERR_OUT_OF_MEM:
 608                 al=SSL_AD_INTERNAL_ERROR;
 609                 break;
 610         case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
 611         case X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN:
 612         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY:
 613         case X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE:
 614         case X509_V_ERR_CERT_CHAIN_TOO_LONG:
 615         case X509_V_ERR_PATH_LENGTH_EXCEEDED:
 616         case X509_V_ERR_INVALID_CA:
 617                 al=SSL_AD_UNKNOWN_CA;
 618                 break;
 619         case X509_V_ERR_APPLICATION_VERIFICATION:
 620                 al=SSL_AD_HANDSHAKE_FAILURE;
 621                 break;
 622         case X509_V_ERR_INVALID_PURPOSE:
 623                 al=SSL_AD_UNSUPPORTED_CERTIFICATE;
 624                 break;
 625         default:
 626                 al=SSL_AD_CERTIFICATE_UNKNOWN;
 627                 break;
 628                 }
 629         return(al);
 630         }
 631
 632 int ssl3_setup_read_buffer(SSL *s)
 633         {
 634         unsigned char *p;
 635         size_t len,align=0,headerlen;
 636
 637         if (SSL_IS_DTLS(s))
 638                 headerlen = DTLS1_RT_HEADER_LENGTH;
 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->rbuf.buf == NULL)
 647                 {
 648                 len = SSL3_RT_MAX_PLAIN_LENGTH
 649                         + SSL3_RT_MAX_ENCRYPTED_OVERHEAD
 650                         + headerlen + align;
 651                 if (s->options & SSL_OP_MICROSOFT_BIG_SSLV3_BUFFER)
 652                         {
 653                         s->s3->init_extra = 1;
 654                         len += SSL3_RT_MAX_EXTRA;
 655                         }
 656                 if ((p=OPENSSL_malloc(len)) == NULL)
 657                         goto err;
 658                 s->s3->rbuf.buf = p;
 659                 s->s3->rbuf.len = len;
 660                 }
 661
 662         s->packet= &(s->s3->rbuf.buf[0]);
 663         return 1;
 664
 665 err:
 666         OPENSSL_PUT_ERROR(SSL, ssl3_setup_read_buffer, ERR_R_MALLOC_FAILURE);
 667         return 0;
 668         }
 669
 670 int ssl3_setup_write_buffer(SSL *s)
 671         {
 672         unsigned char *p;
 673         size_t len,align=0,headerlen;
 674
 675         if (SSL_IS_DTLS(s))
 676                 headerlen = DTLS1_RT_HEADER_LENGTH + 1;
 677         else
 678                 headerlen = SSL3_RT_HEADER_LENGTH;
 679
 680 #if defined(SSL3_ALIGN_PAYLOAD) && SSL3_ALIGN_PAYLOAD!=0
 681         align = (-SSL3_RT_HEADER_LENGTH)&(SSL3_ALIGN_PAYLOAD-1);
 682 #endif
 683
 684         if (s->s3->wbuf.buf == NULL)
 685                 {
 686                 len = s->max_send_fragment
 687                         + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD
 688                         + headerlen + align;
 689                 /* Account for 1/n-1 record splitting. */
 690                 if (s->mode & SSL_MODE_CBC_RECORD_SPLITTING)
 691                         len += headerlen + align + 1
 692                                 + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD;
 693
 694                 if ((p=OPENSSL_malloc(len)) == NULL)
 695                         goto err;
 696                 s->s3->wbuf.buf = p;
 697                 s->s3->wbuf.len = len;
 698                 }
 699
 700         return 1;
 701
 702 err:
 703         OPENSSL_PUT_ERROR(SSL, ssl3_setup_write_buffer, ERR_R_MALLOC_FAILURE);
 704         return 0;
 705         }
 706
 707
 708 int ssl3_setup_buffers(SSL *s)
 709         {
 710         if (!ssl3_setup_read_buffer(s))
 711                 return 0;
 712         if (!ssl3_setup_write_buffer(s))
 713                 return 0;
 714         return 1;
 715         }
 716
 717 int ssl3_release_write_buffer(SSL *s)
 718         {
 719         if (s->s3->wbuf.buf != NULL)
 720                 {
 721                 OPENSSL_free(s->s3->wbuf.buf);
 722                 s->s3->wbuf.buf = NULL;
 723                 }
 724         return 1;
 725         }
 726
 727 int ssl3_release_read_buffer(SSL *s)
 728         {
 729         if (s->s3->rbuf.buf != NULL)
 730                 {
 731                 OPENSSL_free(s->s3->rbuf.buf);
 732                 s->s3->rbuf.buf = NULL;
 733                 }
 734         return 1;
 735         }
 736