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907db7f @bwalex separate out pbkdf2 stuff
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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
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