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/*
* Library to support support file format date and time values
*
* Copyright (C) 2011-2024, Joachim Metz <joachim.metz@gmail.com>
*
* Refer to AUTHORS for acknowledgements.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#if !defined( _LIBCAES_H )
#define _LIBCAES_H
#include <libcaes/definitions.h>
#include <libcaes/error.h>
#include <libcaes/extern.h>
#include <libcaes/features.h>
#include <libcaes/types.h>
#include <stdio.h>
#if defined( __cplusplus )
extern "C" {
#endif
/* -------------------------------------------------------------------------
* Support functions
* ------------------------------------------------------------------------- */
/* Returns the library version
*/
LIBCAES_EXTERN \
const char *libcaes_get_version(
void );
/* -------------------------------------------------------------------------
* Error functions
* ------------------------------------------------------------------------- */
/* Frees an error
*/
LIBCAES_EXTERN \
void libcaes_error_free(
libcaes_error_t **error );
/* Prints a descriptive string of the error to the stream
* Returns the amount of printed characters if successful or -1 on error
*/
LIBCAES_EXTERN \
int libcaes_error_fprint(
libcaes_error_t *error,
FILE *stream );
/* Prints a descriptive string of the error to the string
* The end-of-string character is not included in the return value
* Returns the amount of printed characters if successful or -1 on error
*/
LIBCAES_EXTERN \
int libcaes_error_sprint(
libcaes_error_t *error,
char *string,
size_t size );
/* Prints a backtrace of the error to the stream
* Returns the amount of printed characters if successful or -1 on error
*/
LIBCAES_EXTERN \
int libcaes_error_backtrace_fprint(
libcaes_error_t *error,
FILE *stream );
/* Prints a backtrace of the error to the string
* The end-of-string character is not included in the return value
* Returns the amount of printed characters if successful or -1 on error
*/
LIBCAES_EXTERN \
int libcaes_error_backtrace_sprint(
libcaes_error_t *error,
char *string,
size_t size );
/* -------------------------------------------------------------------------
* Context functions
* ------------------------------------------------------------------------- */
/* Creates a context
* Make sure the value context is referencing, is set to NULL
* Returns 1 if successful or -1 on error
*/
LIBCAES_EXTERN \
int libcaes_context_initialize(
libcaes_context_t **context,
libcaes_error_t **error );
/* Frees a context
* Returns 1 if successful or -1 on error
*/
LIBCAES_EXTERN \
int libcaes_context_free(
libcaes_context_t **context,
libcaes_error_t **error );
/* Sets the key
* Returns 1 if successful or -1 on error
*/
LIBCAES_EXTERN \
int libcaes_context_set_key(
libcaes_context_t *context,
int mode,
const uint8_t *key,
size_t key_bit_size,
libcaes_error_t **error );
/* De- or encrypts a block of data using AES-CBC (Cipher Block Chaining)
* The size must be a multitude of the AES block size (16 byte)
* Returns 1 if successful or -1 on error
*/
LIBCAES_EXTERN \
int libcaes_crypt_cbc(
libcaes_context_t *context,
int mode,
const uint8_t *initialization_vector,
size_t initialization_vector_size,
const uint8_t *input_data,
size_t input_data_size,
uint8_t *output_data,
size_t output_data_size,
libcaes_error_t **error );
/* De- or encrypts a block of data using AES-CCM (Counter with CBC-MAC)
* Note that the key must be set in encryption mode (LIBCAES_CRYPT_MODE_ENCRYPT) for both de- and encryption.
* Returns 1 if successful or -1 on error
*/
LIBCAES_EXTERN \
int libcaes_crypt_ccm(
libcaes_context_t *context,
int mode,
const uint8_t *nonce,
size_t nonce_size,
const uint8_t *input_data,
size_t input_data_size,
uint8_t *output_data,
size_t output_data_size,
libcaes_error_t **error );
/* De- or encrypts a block of data using AES-ECB (Electronic CodeBook)
* The size must be a multitude of the AES block size (16 byte)
* Returns 1 if successful or -1 on error
*/
LIBCAES_EXTERN \
int libcaes_crypt_ecb(
libcaes_context_t *context,
int mode,
const uint8_t *input_data,
size_t input_data_size,
uint8_t *output_data,
size_t output_data_size,
libcaes_error_t **error );
/* -------------------------------------------------------------------------
* Tweaked context functions
* ------------------------------------------------------------------------- */
/* Creates a tweaked context
* Make sure the value tweaked context is referencing, is set to NULL
* Returns 1 if successful or -1 on error
*/
LIBCAES_EXTERN \
int libcaes_tweaked_context_initialize(
libcaes_tweaked_context_t **tweaked_context,
libcaes_error_t **error );
/* Frees a tweaked context
* Returns 1 if successful or -1 on error
*/
LIBCAES_EXTERN \
int libcaes_tweaked_context_free(
libcaes_tweaked_context_t **tweaked_context,
libcaes_error_t **error );
/* Sets the keys
* Returns 1 if successful or -1 on error
*/
LIBCAES_EXTERN \
int libcaes_tweaked_context_set_keys(
libcaes_tweaked_context_t *tweaked_context,
int mode,
const uint8_t *key,
size_t key_bit_size,
const uint8_t *tweak_key,
size_t tweak_key_bit_size,
libcaes_error_t **error );
/* De- or encrypts a block of data using AES-XTS (XEX-based tweaked-codebook mode with ciphertext stealing)
* The size must be a multitude of the AES block size (16 byte)
* Returns 1 if successful or -1 on error
*/
LIBCAES_EXTERN \
int libcaes_crypt_xts(
libcaes_tweaked_context_t *tweaked_context,
int mode,
const uint8_t *tweak_value,
size_t tweak_value_size,
const uint8_t *input_data,
size_t input_data_size,
uint8_t *output_data,
size_t output_data_size,
libcaes_error_t **error );
#if defined( __cplusplus )
}
#endif
#endif /* !defined( _LIBCAES_H ) */
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