/* $NetBSD: iterated_hash.c,v 1.3.4.1 2024/02/29 12:35:00 martin Exp $ */ /* * 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 #include #include #include #include #if OPENSSL_VERSION_NUMBER < 0x30000000L || OPENSSL_API_LEVEL < 30000 #include 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) { ERR_clear_error(); return (0); } if (SHA1_Update(&ctx, buf, len) != 1) { ERR_clear_error(); return (0); } if (SHA1_Update(&ctx, salt, saltlength) != 1) { ERR_clear_error(); return (0); } if (SHA1_Final(out, &ctx) != 1) { ERR_clear_error(); return (0); } buf = out; len = SHA_DIGEST_LENGTH; } while (n++ < iterations); return (SHA_DIGEST_LENGTH); } #else #include #include 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; unsigned int outlength = 0; const unsigned char *buf; EVP_MD_CTX *ctx; ; EVP_MD *md; if (hashalg != 1) { return (0); } ctx = EVP_MD_CTX_new(); RUNTIME_CHECK(ctx != NULL); md = EVP_MD_fetch(NULL, "SHA1", NULL); RUNTIME_CHECK(md != NULL); buf = in; len = inlength; do { if (EVP_DigestInit_ex(ctx, md, NULL) != 1) { goto fail; } if (EVP_DigestUpdate(ctx, buf, len) != 1) { goto fail; } if (EVP_DigestUpdate(ctx, salt, saltlength) != 1) { goto fail; } if (EVP_DigestFinal_ex(ctx, out, &outlength) != 1) { goto fail; } buf = out; len = outlength; } while (n++ < iterations); EVP_MD_CTX_free(ctx); EVP_MD_free(md); return (outlength); fail: EVP_MD_CTX_free(ctx); EVP_MD_free(md); ERR_clear_error(); return (0); } #endif