1 /*
2 * Copyright (C) 2006, 2008, 2009 Internet Systems Consortium, Inc. ("ISC")
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
9 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
10 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
11 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
12 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
13 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
14 * PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 /* $Id: iterated_hash.c,v 1.6 2009/02/18 23:47:48 tbox Exp $ */
18
19 #include "config.h"
20
21 #include <stdio.h>
22
23 #include <isc/sha1.h>
24 #include <isc/iterated_hash.h>
25
26 int
isc_iterated_hash(unsigned char out[ISC_SHA1_DIGESTLENGTH],unsigned int hashalg,int iterations,const unsigned char * salt,int saltlength,const unsigned char * in,int inlength)27 isc_iterated_hash(unsigned char out[ISC_SHA1_DIGESTLENGTH],
28 unsigned int hashalg, int iterations,
29 const unsigned char *salt, int saltlength,
30 const unsigned char *in, int inlength)
31 {
32 isc_sha1_t ctx;
33 int n = 0;
34
35 if (hashalg != 1)
36 return (0);
37
38 do {
39 isc_sha1_init(&ctx);
40 isc_sha1_update(&ctx, in, inlength);
41 isc_sha1_update(&ctx, salt, saltlength);
42 isc_sha1_final(&ctx, out);
43 in = out;
44 inlength = ISC_SHA1_DIGESTLENGTH;
45 } while (n++ < iterations);
46
47 return (ISC_SHA1_DIGESTLENGTH);
48 }
49