/* $NetBSD: md.c,v 1.5.2.1 2024/02/25 15:47:17 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 #include #include "openssl_shim.h" isc_md_t * isc_md_new(void) { isc_md_t *md = EVP_MD_CTX_new(); RUNTIME_CHECK(md != NULL); return (md); } void isc_md_free(isc_md_t *md) { if (md == NULL) { return; } EVP_MD_CTX_free(md); } isc_result_t isc_md_init(isc_md_t *md, const isc_md_type_t *md_type) { REQUIRE(md != NULL); if (md_type == NULL) { return (ISC_R_NOTIMPLEMENTED); } if (EVP_DigestInit_ex(md, md_type, NULL) != 1) { ERR_clear_error(); return (ISC_R_CRYPTOFAILURE); } return (ISC_R_SUCCESS); } isc_result_t isc_md_reset(isc_md_t *md) { REQUIRE(md != NULL); if (EVP_MD_CTX_reset(md) != 1) { ERR_clear_error(); return (ISC_R_CRYPTOFAILURE); } return (ISC_R_SUCCESS); } isc_result_t isc_md_update(isc_md_t *md, const unsigned char *buf, const size_t len) { REQUIRE(md != NULL); if (buf == NULL || len == 0) { return (ISC_R_SUCCESS); } if (EVP_DigestUpdate(md, buf, len) != 1) { ERR_clear_error(); return (ISC_R_CRYPTOFAILURE); } return (ISC_R_SUCCESS); } isc_result_t isc_md_final(isc_md_t *md, unsigned char *digest, unsigned int *digestlen) { REQUIRE(md != NULL); REQUIRE(digest != NULL); if (EVP_DigestFinal_ex(md, digest, digestlen) != 1) { ERR_clear_error(); return (ISC_R_CRYPTOFAILURE); } return (ISC_R_SUCCESS); } const isc_md_type_t * isc_md_get_md_type(isc_md_t *md) { REQUIRE(md != NULL); return (EVP_MD_CTX_get0_md(md)); } size_t isc_md_get_size(isc_md_t *md) { REQUIRE(md != NULL); return (EVP_MD_CTX_size(md)); } size_t isc_md_get_block_size(isc_md_t *md) { REQUIRE(md != NULL); return (EVP_MD_CTX_block_size(md)); } size_t isc_md_type_get_size(const isc_md_type_t *md_type) { STATIC_ASSERT(ISC_MAX_MD_SIZE >= EVP_MAX_MD_SIZE, "Change ISC_MAX_MD_SIZE to be greater than or equal to " "EVP_MAX_MD_SIZE"); if (md_type != NULL) { return ((size_t)EVP_MD_size(md_type)); } return (ISC_MAX_MD_SIZE); } size_t isc_md_type_get_block_size(const isc_md_type_t *md_type) { STATIC_ASSERT(ISC_MAX_MD_SIZE >= EVP_MAX_MD_SIZE, "Change ISC_MAX_MD_SIZE to be greater than or equal to " "EVP_MAX_MD_SIZE"); if (md_type != NULL) { return ((size_t)EVP_MD_block_size(md_type)); } return (ISC_MAX_MD_SIZE); } isc_result_t isc_md(const isc_md_type_t *md_type, const unsigned char *buf, const size_t len, unsigned char *digest, unsigned int *digestlen) { isc_md_t *md; isc_result_t res; md = isc_md_new(); res = isc_md_init(md, md_type); if (res != ISC_R_SUCCESS) { goto end; } res = isc_md_update(md, buf, len); if (res != ISC_R_SUCCESS) { goto end; } res = isc_md_final(md, digest, digestlen); if (res != ISC_R_SUCCESS) { goto end; } end: isc_md_free(md); return (res); } #define md_register_algorithm(alg) \ const isc_md_type_t *isc__md_##alg(void) { \ const isc_md_type_t *value = EVP_##alg(); \ if (value == NULL) { \ ERR_clear_error(); \ } \ return (value); \ } md_register_algorithm(md5); md_register_algorithm(sha1); md_register_algorithm(sha224); md_register_algorithm(sha256); md_register_algorithm(sha384); md_register_algorithm(sha512);