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104 lines
2.9 KiB
104 lines
2.9 KiB
/* |
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* Copyright (C) 2012 Martin Storsjo |
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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 AVUTIL_HMAC_H |
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#define AVUTIL_HMAC_H |
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#include <stdint.h> |
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#include "version.h" |
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/** |
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* @defgroup lavu_hmac HMAC |
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* @ingroup lavu_crypto |
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* @{ |
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*/ |
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enum AVHMACType { |
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AV_HMAC_MD5, |
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AV_HMAC_SHA1, |
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AV_HMAC_SHA224, |
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AV_HMAC_SHA256, |
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#if FF_API_HMAC |
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AV_HMAC_SHA224_DEPRECATED = 10, |
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AV_HMAC_SHA256_DEPRECATED, |
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#endif |
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AV_HMAC_SHA384 = 12, |
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AV_HMAC_SHA512, |
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}; |
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typedef struct AVHMAC AVHMAC; |
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/** |
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* Allocate an AVHMAC context. |
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* @param type The hash function used for the HMAC. |
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*/ |
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AVHMAC *av_hmac_alloc(enum AVHMACType type); |
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/** |
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* Free an AVHMAC context. |
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* @param ctx The context to free, may be NULL |
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*/ |
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void av_hmac_free(AVHMAC *ctx); |
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/** |
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* Initialize an AVHMAC context with an authentication key. |
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* @param ctx The HMAC context |
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* @param key The authentication key |
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* @param keylen The length of the key, in bytes |
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*/ |
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void av_hmac_init(AVHMAC *ctx, const uint8_t *key, unsigned int keylen); |
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/** |
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* Hash data with the HMAC. |
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* @param ctx The HMAC context |
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* @param data The data to hash |
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* @param len The length of the data, in bytes |
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*/ |
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void av_hmac_update(AVHMAC *ctx, const uint8_t *data, unsigned int len); |
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/** |
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* Finish hashing and output the HMAC digest. |
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* @param ctx The HMAC context |
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* @param out The output buffer to write the digest into |
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* @param outlen The length of the out buffer, in bytes |
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* @return The number of bytes written to out, or a negative error code. |
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*/ |
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int av_hmac_final(AVHMAC *ctx, uint8_t *out, unsigned int outlen); |
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/** |
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* Hash an array of data with a key. |
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* @param ctx The HMAC context |
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* @param data The data to hash |
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* @param len The length of the data, in bytes |
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* @param key The authentication key |
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* @param keylen The length of the key, in bytes |
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* @param out The output buffer to write the digest into |
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* @param outlen The length of the out buffer, in bytes |
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* @return The number of bytes written to out, or a negative error code. |
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*/ |
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int av_hmac_calc(AVHMAC *ctx, const uint8_t *data, unsigned int len, |
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const uint8_t *key, unsigned int keylen, |
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uint8_t *out, unsigned int outlen); |
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/** |
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* @} |
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*/ |
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#endif /* AVUTIL_HMAC_H */
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