chromium/third_party/ffmpeg/libavutil/tea.c

/*
 * A 32-bit implementation of the TEA algorithm
 * Copyright (c) 2015 Vesselin Bontchev
 *
 * Loosely based on the implementation of David Wheeler and Roger Needham,
 * https://en.wikipedia.org/wiki/Tiny_Encryption_Algorithm#Reference_code
 *
 * 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 "intreadwrite.h"
#include "mem.h"
#include "tea.h"

AVTEA;

struct AVTEA *av_tea_alloc(void)
{ … }

const int av_tea_size = …;

void av_tea_init(AVTEA *ctx, const uint8_t key[16], int rounds)
{ … }

static void tea_crypt_ecb(AVTEA *ctx, uint8_t *dst, const uint8_t *src,
                          int decrypt, uint8_t *iv)
{ … }

void av_tea_crypt(AVTEA *ctx, uint8_t *dst, const uint8_t *src, int count,
                  uint8_t *iv, int decrypt)
{ … }