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PATH: usr / include / ffmpeg / libavutil

/*
 * Copyright (C) 2012 Martin Storsjo
 *
 * 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
 */

#ifndef AVUTIL_HMAC_H
#define AVUTIL_HMAC_H

#include <stdint.h>

#include "version.h"
/**
 * @defgroup lavu_hmac HMAC
 * @ingroup lavu_crypto
 * @{
 */

enum AVHMACType {
    AV_HMAC_MD5,
    AV_HMAC_SHA1,
    AV_HMAC_SHA224,
    AV_HMAC_SHA256,
#if FF_API_HMAC
    AV_HMAC_SHA224_DEPRECATED = 10,
    AV_HMAC_SHA256_DEPRECATED,
#endif
    AV_HMAC_SHA384 = 12,
    AV_HMAC_SHA512,
};

typedef struct AVHMAC AVHMAC;

/**
 * Allocate an AVHMAC context.
 * @param type The hash function used for the HMAC.
 */
AVHMAC *av_hmac_alloc(enum AVHMACType type);

/**
 * Free an AVHMAC context.
 * @param ctx The context to free, may be NULL
 */
void av_hmac_free(AVHMAC *ctx);

/**
 * Initialize an AVHMAC context with an authentication key.
 * @param ctx    The HMAC context
 * @param key    The authentication key
 * @param keylen The length of the key, in bytes
 */
void av_hmac_init(AVHMAC *ctx, const uint8_t *key, unsigned int keylen);

/**
 * Hash data with the HMAC.
 * @param ctx  The HMAC context
 * @param data The data to hash
 * @param len  The length of the data, in bytes
 */
void av_hmac_update(AVHMAC *ctx, const uint8_t *data, unsigned int len);

/**
 * Finish hashing and output the HMAC digest.
 * @param ctx    The HMAC context
 * @param out    The output buffer to write the digest into
 * @param outlen The length of the out buffer, in bytes
 * @return       The number of bytes written to out, or a negative error code.
 */
int av_hmac_final(AVHMAC *ctx, uint8_t *out, unsigned int outlen);

/**
 * Hash an array of data with a key.
 * @param ctx    The HMAC context
 * @param data   The data to hash
 * @param len    The length of the data, in bytes
 * @param key    The authentication key
 * @param keylen The length of the key, in bytes
 * @param out    The output buffer to write the digest into
 * @param outlen The length of the out buffer, in bytes
 * @return       The number of bytes written to out, or a negative error code.
 */
int av_hmac_calc(AVHMAC *ctx, const uint8_t *data, unsigned int len,
                 const uint8_t *key, unsigned int keylen,
                 uint8_t *out, unsigned int outlen);

/**
 * @}
 */

#endif /* AVUTIL_HMAC_H */

[-] dict.h [edit]
[-] md5.h [edit]
[-] file.h [edit]
[-] version.h [edit]
[-] eval.h [edit]
[-] aes.h [edit]
[-] sha512.h [edit]
[-] replaygain.h [edit]
[-] samplefmt.h [edit]
[-] threadmessage.h [edit]
[-] motion_vector.h [edit]
[-] pixdesc.h [edit]
[-] old_pix_fmts.h [edit]
[-] intreadwrite.h [edit]
[-] tea.h [edit]
[+] ..
[-] base64.h [edit]
[-] stereo3d.h [edit]
[-] avassert.h [edit]
[-] opt.h [edit]
[-] mem.h [edit]
[-] parseutils.h [edit]
[-] camellia.h [edit]
[-] random_seed.h [edit]
[-] cast5.h [edit]
[-] bswap.h [edit]
[-] pixelutils.h [edit]
[-] attributes.h [edit]
[-] log.h [edit]
[-] avstring.h [edit]
[-] imgutils.h [edit]
[-] adler32.h [edit]
[-] crc.h [edit]
[-] time.h [edit]
[-] audio_fifo.h [edit]
[-] hash.h [edit]
[-] intfloat.h [edit]
[-] timecode.h [edit]
[-] lzo.h [edit]
[-] ffversion.h [edit]
[-] frame.h [edit]
[-] hmac.h [edit]
[-] cpu.h [edit]
[-] lfg.h [edit]
[-] bprint.h [edit]
[-] xtea.h [edit]
[-] murmur3.h [edit]
[-] rational.h [edit]
[-] avconfig.h [edit]
[-] downmix_info.h [edit]
[-] display.h [edit]
[-] error.h [edit]
[-] twofish.h [edit]
[-] pixfmt.h [edit]
[-] common.h [edit]
[-] avutil.h [edit]
[-] audioconvert.h [edit]
[-] channel_layout.h [edit]
[-] macros.h [edit]
[-] timestamp.h [edit]
[-] mathematics.h [edit]
[-] sha.h [edit]
[-] ripemd.h [edit]
[-] blowfish.h [edit]
[-] fifo.h [edit]
[-] buffer.h [edit]