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ntp 4.2.6p5

    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 1.1.1.1 2012/05/29 12:08:38 misho 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
   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: }