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