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ffmpeg / libavutil / aes.h @ 0b006599

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1 6287dc9a Michael Niedermayer
/*
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 * copyright (c) 2007 Michael Niedermayer <michaelni@gmx.at>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef AES_H
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#define AES_H
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extern const int av_aes_size;
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struct AVAES;
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/**
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 * initalizes a AVAES context
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 * @param key_bits 128, 192 or 256
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 * @param decrypt 0 for encryption, 1 for decryption
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 */
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int av_aes_init(struct AVAES *a, const uint8_t *key, int key_bits, int decrypt);
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/**
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 * encrypts / decrypts.
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 * @param count number of 16 byte blocks
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 * @param dst destination array, can be equal to src
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 * @param src source array, can be equal to dst
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 * @param iv initalization vector for CBC mode, if NULL then ECB will be used
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 * @param decrypt 0 for encryption, 1 for decryption
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 */
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void av_aes_crypt(struct AVAES *a, uint8_t *dst, uint8_t *src, int count, uint8_t *iv, int decrypt);
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#endif /* AES_H */