mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2012 Martin Storsjo
|
||
|
|
*
|
||
|
|
* This file is part of Libav.
|
||
|
|
*
|
||
|
|
* Libav 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.
|
||
|
|
*
|
||
|
|
* Libav 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 Libav; 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>
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @defgroup lavu_hmac HMAC
|
||
|
|
* @ingroup lavu_crypto
|
||
|
|
* @{
|
||
|
|
*/
|
||
|
|
|
||
|
|
enum AVHMACType {
|
||
|
|
AV_HMAC_MD5,
|
||
|
|
AV_HMAC_SHA1,
|
||
|
|
};
|
||
|
|
|
||
|
|
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 */
|