lib/libtcplay/pbkdf2-openssl.c

   1 /*
   2  * Copyright (c) 2011 Alex Hornung <alex@alexhornung.com>.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in
  13  *    the documentation and/or other materials provided with the
  14  *    distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  19  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  20  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  22  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  24  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  25  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  26  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include <errno.h>
  31 #include <openssl/evp.h>
  32
  33 #include "tcplay.h"
  34
  35
  36 int
  37 pbkdf2(struct pbkdf_prf_algo *hash, const char *pass, int passlen,
  38     const unsigned char *salt, int saltlen,
  39     int keylen, unsigned char *out)
  40 {
  41         const EVP_MD *md;
  42         int r;
  43
  44         OpenSSL_add_all_algorithms();
  45
  46         md = EVP_get_digestbyname(hash->name);
  47         if (md == NULL) {
  48                 tc_log(1, "Hash %s not found\n", hash->name);
  49                 return ENOENT;
  50         }
  51         r = PKCS5_PBKDF2_HMAC(pass, passlen, salt, saltlen,
  52             hash->iteration_count, md, keylen, out);
  53
  54         if (r == 0) {
  55                 tc_log(1, "Error in PBKDF2\n");
  56                 return EINVAL;
  57         }
  58
  59         return 0;
  60 }
  61