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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2013-2018 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>
#if defined(HAVE_STDINT_H)
# include <stdint.h>
#elif defined(HAVE_INTTYPES_H)
# include <inttypes.h>
#endif
#include <unistd.h>
#include <errno.h>
#include <sudo_compat.h>
#include <sudo_debug.h>
#include <sudo_digest.h>
#ifdef HAVE_SHA224UPDATE
# include <sha2.h>
#else
# include <compat/sha2.h>
#endif
static struct digest_function {
const size_t digest_len;
void (*init)(SHA2_CTX *);
#ifdef SHA2_VOID_PTR
void (*update)(SHA2_CTX *, const void *, size_t);
void (*final)(void *, SHA2_CTX *);
#else
void (*update)(SHA2_CTX *, const unsigned char *, size_t);
void (*final)(unsigned char *, SHA2_CTX *);
#endif
} digest_functions[] = {
{
SHA224_DIGEST_LENGTH,
SHA224Init,
SHA224Update,
SHA224Final
}, {
SHA256_DIGEST_LENGTH,
SHA256Init,
SHA256Update,
SHA256Final
}, {
SHA384_DIGEST_LENGTH,
SHA384Init,
SHA384Update,
SHA384Final
}, {
SHA512_DIGEST_LENGTH,
SHA512Init,
SHA512Update,
SHA512Final
}, {
0
}
};
struct sudo_digest {
struct digest_function *func;
SHA2_CTX ctx;
};
struct sudo_digest *
sudo_digest_alloc_v1(unsigned int digest_type)
{
debug_decl(sudo_digest_alloc, SUDO_DEBUG_UTIL);
struct digest_function *func = NULL;
struct sudo_digest *dig;
unsigned int i;
for (i = 0; digest_functions[i].digest_len != 0; i++) {
if (digest_type == i) {
func = &digest_functions[i];
break;
}
}
if (func == NULL) {
errno = EINVAL;
debug_return_ptr(NULL);
}
if ((dig = malloc(sizeof(*dig))) == NULL)
debug_return_ptr(NULL);
func->init(&dig->ctx);
dig->func = func;
debug_return_ptr(dig);
}
void
sudo_digest_free_v1(struct sudo_digest *dig)
{
debug_decl(sudo_digest_free, SUDO_DEBUG_UTIL);
free(dig);
debug_return;
}
void
sudo_digest_reset_v1(struct sudo_digest *dig)
{
debug_decl(sudo_digest_reset, SUDO_DEBUG_UTIL);
dig->func->init(&dig->ctx);
debug_return;
}
size_t
sudo_digest_getlen_v2(unsigned int digest_type)
{
debug_decl(sudo_digest_getlen, SUDO_DEBUG_UTIL);
unsigned int i;
for (i = 0; digest_functions[i].digest_len != 0; i++) {
if (digest_type == i)
debug_return_size_t(digest_functions[i].digest_len);
}
debug_return_size_t(0);
}
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);
dig->func->update(&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);
dig->func->final(md, &dig->ctx);
debug_return;
}
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