chromium/third_party/ffmpeg/libavutil/aes_ctr.c

/*
 * AES-CTR cipher
 * Copyright (c) 2015 Eran Kornblau <erankor at gmail dot com>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg 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 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <string.h>

#include "aes_ctr.h"
#include "aes.h"
#include "aes_internal.h"
#include "macros.h"
#include "mem.h"
#include "random_seed.h"

#define AES_BLOCK_SIZE …

AVAESCTR;

struct AVAESCTR *av_aes_ctr_alloc(void)
{ … }

void av_aes_ctr_set_iv(struct AVAESCTR *a, const uint8_t* iv)
{ … }

void av_aes_ctr_set_full_iv(struct AVAESCTR *a, const uint8_t* iv)
{ … }

const uint8_t* av_aes_ctr_get_iv(struct AVAESCTR *a)
{ … }

void av_aes_ctr_set_random_iv(struct AVAESCTR *a)
{ … }

int av_aes_ctr_init(struct AVAESCTR *a, const uint8_t *key)
{ … }

void av_aes_ctr_free(struct AVAESCTR *a)
{ … }

static void av_aes_ctr_increment_be64(uint8_t* counter)
{ … }

void av_aes_ctr_increment_iv(struct AVAESCTR *a)
{ … }

void av_aes_ctr_crypt(struct AVAESCTR *a, uint8_t *dst, const uint8_t *src, int count)
{ … }