1 /* $NetBSD: iterated_hash.c,v 1.4 2014/12/10 04:37:59 christos Exp $ */ 2 3 /* 4 * Copyright (C) 2006, 2008, 2009 Internet Systems Consortium, Inc. ("ISC") 5 * 6 * Permission to use, copy, modify, and/or distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 11 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 12 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 13 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 14 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 15 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 16 * PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 /* Id: iterated_hash.c,v 1.6 2009/02/18 23:47:48 tbox Exp */ 20 21 #include "config.h" 22 23 #include <stdio.h> 24 25 #include <isc/sha1.h> 26 #include <isc/iterated_hash.h> 27 28 int 29 isc_iterated_hash(unsigned char out[ISC_SHA1_DIGESTLENGTH], 30 unsigned int hashalg, int iterations, 31 const unsigned char *salt, int saltlength, 32 const unsigned char *in, int inlength) 33 { 34 isc_sha1_t ctx; 35 int n = 0; 36 37 if (hashalg != 1) 38 return (0); 39 40 do { 41 isc_sha1_init(&ctx); 42 isc_sha1_update(&ctx, in, inlength); 43 isc_sha1_update(&ctx, salt, saltlength); 44 isc_sha1_final(&ctx, out); 45 in = out; 46 inlength = ISC_SHA1_DIGESTLENGTH; 47 } while (n++ < iterations); 48 49 return (ISC_SHA1_DIGESTLENGTH); 50 } 51