1 /* $NetBSD: iterated_hash.c,v 1.1 2024/02/18 20:57:49 christos Exp $ */ 2 3 /* 4 * Copyright (C) Internet Systems Consortium, Inc. ("ISC") 5 * 6 * SPDX-License-Identifier: MPL-2.0 7 * 8 * This Source Code Form is subject to the terms of the Mozilla Public 9 * License, v. 2.0. If a copy of the MPL was not distributed with this 10 * file, you can obtain one at https://mozilla.org/MPL/2.0/. 11 * 12 * See the COPYRIGHT file distributed with this work for additional 13 * information regarding copyright ownership. 14 */ 15 16 #include <stdio.h> 17 18 #include <openssl/opensslv.h> 19 #include <openssl/sha.h> 20 21 #include <isc/iterated_hash.h> 22 #include <isc/thread.h> 23 #include <isc/util.h> 24 25 int 26 isc_iterated_hash(unsigned char *out, const unsigned int hashalg, 27 const int iterations, const unsigned char *salt, 28 const int saltlength, const unsigned char *in, 29 const int inlength) { 30 REQUIRE(out != NULL); 31 32 int n = 0; 33 size_t len; 34 const unsigned char *buf; 35 SHA_CTX ctx; 36 37 if (hashalg != 1) { 38 return (0); 39 } 40 41 buf = in; 42 len = inlength; 43 44 do { 45 if (SHA1_Init(&ctx) != 1) { 46 return (0); 47 } 48 49 if (SHA1_Update(&ctx, buf, len) != 1) { 50 return (0); 51 } 52 53 if (SHA1_Update(&ctx, salt, saltlength) != 1) { 54 return (0); 55 } 56 57 if (SHA1_Final(out, &ctx) != 1) { 58 return (0); 59 } 60 61 buf = out; 62 len = SHA_DIGEST_LENGTH; 63 } while (n++ < iterations); 64 65 return (SHA_DIGEST_LENGTH); 66 } 67