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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#include <stdio.h>
#include <openssl/opensslv.h>
#include <openssl/sha.h>
#include <isc/iterated_hash.h>
#include <isc/thread.h>
#include <isc/util.h>
int
isc_iterated_hash(unsigned char *out, const unsigned int hashalg,
const int iterations, const unsigned char *salt,
const int saltlength, const unsigned char *in,
const int inlength) {
REQUIRE(out != NULL);
int n = 0;
size_t len;
const unsigned char *buf;
SHA_CTX ctx;
if (hashalg != 1) {
return (0);
}
buf = in;
len = inlength;
do {
if (SHA1_Init(&ctx) != 1) {
return (0);
}
if (SHA1_Update(&ctx, buf, len) != 1) {
return (0);
}
if (SHA1_Update(&ctx, salt, saltlength) != 1) {
return (0);
}
if (SHA1_Final(out, &ctx) != 1) {
return (0);
}
buf = out;
len = SHA_DIGEST_LENGTH;
} while (n++ < iterations);
return (SHA_DIGEST_LENGTH);
}
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