| /* | |
| * 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 | |
| */ | |
| /** | |
| * @defgroup lavu_hmac HMAC | |
| * @ingroup lavu_crypto | |
| * @{ | |
| */ | |
| enum AVHMACType { | |
| AV_HMAC_MD5, | |
| AV_HMAC_SHA1, | |
| AV_HMAC_SHA224, | |
| AV_HMAC_SHA256, | |
| AV_HMAC_SHA384, | |
| 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); | |
| /** | |
| * @} | |
| */ | |