external/bsd/bind/dist/lib/isc/iterated_hash.c

   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 }