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/*
* 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 <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_STRING_H
# include <string.h>
#endif /* HAVE_STRING_H */
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif /* HAVE_STRINGS_H */
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <openssl/sha.h>
#include "sudo_compat.h"
#include "sudo_debug.h"
#include "sudo_digest.h"
union ANY_CTX {
SHA256_CTX sha256;
SHA512_CTX sha512;
};
static struct digest_function {
const unsigned int digest_len;
int (*init)(union ANY_CTX *);
int (*update)(union ANY_CTX *, const void *, size_t);
int (*final)(unsigned char *, union ANY_CTX *);
} digest_functions[] = {
{
SHA224_DIGEST_LENGTH,
(int (*)(union ANY_CTX *))SHA224_Init,
(int (*)(union ANY_CTX *, const void *, size_t))SHA224_Update,
(int (*)(unsigned char *, union ANY_CTX *))SHA224_Final
}, {
SHA256_DIGEST_LENGTH,
(int (*)(union ANY_CTX *))SHA256_Init,
(int (*)(union ANY_CTX *, const void *, size_t))SHA256_Update,
(int (*)(unsigned char *, union ANY_CTX *))SHA256_Final
}, {
SHA384_DIGEST_LENGTH,
(int (*)(union ANY_CTX *))SHA384_Init,
(int (*)(union ANY_CTX *, const void *, size_t))SHA384_Update,
(int (*)(unsigned char *, union ANY_CTX *))SHA384_Final
}, {
SHA512_DIGEST_LENGTH,
(int (*)(union ANY_CTX *))SHA512_Init,
(int (*)(union ANY_CTX *, const void *, size_t))SHA512_Update,
(int (*)(unsigned char *, union ANY_CTX *))SHA512_Final
}, {
0
}
};
struct sudo_digest {
struct digest_function *func;
union ANY_CTX ctx;
};
struct sudo_digest *
sudo_digest_alloc_v1(int digest_type)
{
debug_decl(sudo_digest_alloc, SUDO_DEBUG_UTIL)
struct digest_function *func = NULL;
struct sudo_digest *dig;
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;
}
int
sudo_digest_getlen_v1(int digest_type)
{
debug_decl(sudo_digest_getlen, SUDO_DEBUG_UTIL)
int i;
for (i = 0; digest_functions[i].digest_len != 0; i++) {
if (digest_type == i)
debug_return_int(digest_functions[i].digest_len);
}
debug_return_int(-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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