mirror of https://github.com/sudo-project/sudo.git
160 lines
3.5 KiB
C
160 lines
3.5 KiB
C
/*
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* SPDX-License-Identifier: ISC
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*
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* Copyright (c) 2013-2021 Todd C. Miller <Todd.Miller@sudo.ws>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* This is an open source non-commercial project. Dear PVS-Studio, please check it.
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* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
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*/
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#include <config.h>
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#include <stdlib.h>
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#include <errno.h>
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#if defined(HAVE_WOLFSSL)
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# include <wolfssl/options.h>
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#endif
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#include <openssl/evp.h>
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#include <sudo_compat.h>
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#include <sudo_debug.h>
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#include <sudo_digest.h>
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struct sudo_digest {
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EVP_MD_CTX *ctx;
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const EVP_MD *md;
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};
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static const EVP_MD *
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sudo_digest_type_to_md(unsigned int digest_type)
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{
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const EVP_MD *md = NULL;
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debug_decl(sudo_digest_type_to_md, SUDO_DEBUG_UTIL);
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switch (digest_type) {
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case SUDO_DIGEST_SHA224:
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md = EVP_sha224();
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break;
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case SUDO_DIGEST_SHA256:
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md = EVP_sha256();
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break;
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case SUDO_DIGEST_SHA384:
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md = EVP_sha384();
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break;
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case SUDO_DIGEST_SHA512:
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md = EVP_sha512();
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break;
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default:
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errno = EINVAL;
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break;
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}
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debug_return_const_ptr(md);
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}
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struct sudo_digest *
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sudo_digest_alloc_v1(unsigned int digest_type)
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{
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struct sudo_digest *dig;
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EVP_MD_CTX *mdctx = NULL;
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const EVP_MD *md;
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debug_decl(sudo_digest_alloc, SUDO_DEBUG_UTIL);
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md = sudo_digest_type_to_md(digest_type);
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if (md == NULL)
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goto bad;
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mdctx = EVP_MD_CTX_new();
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if (mdctx == NULL || !EVP_DigestInit_ex(mdctx, md, NULL))
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goto bad;
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if ((dig = malloc(sizeof(*dig))) == NULL)
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goto bad;
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dig->md = md;
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dig->ctx = mdctx;
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debug_return_ptr(dig);
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bad:
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EVP_MD_CTX_free(mdctx);
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debug_return_ptr(NULL);
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}
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void
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sudo_digest_free_v1(struct sudo_digest *dig)
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{
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debug_decl(sudo_digest_free, SUDO_DEBUG_UTIL);
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if (dig != NULL) {
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EVP_MD_CTX_free(dig->ctx);
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free(dig);
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}
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debug_return;
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}
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void
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sudo_digest_reset_v1(struct sudo_digest *dig)
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{
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debug_decl(sudo_digest_reset, SUDO_DEBUG_UTIL);
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/* These cannot fail. */
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EVP_MD_CTX_reset(dig->ctx);
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EVP_DigestInit_ex(dig->ctx, dig->md, NULL);
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debug_return;
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}
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size_t
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sudo_digest_getlen_v2(unsigned int digest_type)
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{
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const EVP_MD *md;
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debug_decl(sudo_digest_getlen, SUDO_DEBUG_UTIL);
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md = sudo_digest_type_to_md(digest_type);
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if (md == NULL)
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debug_return_size_t(0);
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debug_return_size_t((size_t)EVP_MD_size(md));
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}
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int
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sudo_digest_getlen_v1(unsigned int digest_type)
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{
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size_t len = sudo_digest_getlen_v2(digest_type);
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return len ? (int)len : -1;
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}
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void
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sudo_digest_update_v1(struct sudo_digest *dig, const void *data, size_t len)
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{
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debug_decl(sudo_digest_update, SUDO_DEBUG_UTIL);
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EVP_DigestUpdate(dig->ctx, data, len);
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debug_return;
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}
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void
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sudo_digest_final_v1(struct sudo_digest *dig, unsigned char *md)
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{
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debug_decl(sudo_digest_final, SUDO_DEBUG_UTIL);
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EVP_DigestFinal_ex(dig->ctx, md, NULL);
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debug_return;
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}
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