1 /*
2 * Copyright (C) 2012 Martin Storsjo
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #ifndef AVUTIL_HMAC_H
22 #define AVUTIL_HMAC_H
23
24 #include <stdint.h>
25
27 /**
28 * @defgroup lavu_hmac HMAC
29 * @ingroup lavu_crypto
30 * @{
31 */
32
40 };
41
43
44 /**
45 * Allocate an AVHMAC context.
46 * @param type The hash function used for the HMAC.
47 */
49
50 /**
51 * Free an AVHMAC context.
52 * @param ctx The context to free, may be NULL
53 */
55
56 /**
57 * Initialize an AVHMAC context with an authentication key.
58 * @param ctx The HMAC context
59 * @param key The authentication key
60 * @param keylen The length of the key, in bytes
61 */
63
64 /**
65 * Hash data with the HMAC.
66 * @param ctx The HMAC context
67 * @param data The data to hash
68 * @param len The length of the data, in bytes
69 */
71
72 /**
73 * Finish hashing and output the HMAC digest.
74 * @param ctx The HMAC context
75 * @param out The output buffer to write the digest into
76 * @param outlen The length of the out buffer, in bytes
77 * @return The number of bytes written to out, or a negative error code.
78 */
80
81 /**
82 * Hash an array of data with a key.
83 * @param ctx The HMAC context
84 * @param data The data to hash
85 * @param len The length of the data, in bytes
86 * @param key The authentication key
87 * @param keylen The length of the key, in bytes
88 * @param out The output buffer to write the digest into
89 * @param outlen The length of the out buffer, in bytes
90 * @return The number of bytes written to out, or a negative error code.
91 */
95
96 /**
97 * @}
98 */
99
100 #endif /* AVUTIL_HMAC_H */
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)
Hash an array of data with a key.
ptrdiff_t const GLvoid * data
AVHMAC * av_hmac_alloc(enum AVHMACType type)
Allocate an AVHMAC context.
void av_hmac_update(AVHMAC *ctx, const uint8_t *data, unsigned int len)
Hash data with the HMAC.
Libavutil version macros.
void av_hmac_init(AVHMAC *ctx, const uint8_t *key, unsigned int keylen)
Initialize an AVHMAC context with an authentication key.
uint8_t key[MAX_BLOCKLEN]
int av_hmac_final(AVHMAC *ctx, uint8_t *out, unsigned int outlen)
Finish hashing and output the HMAC digest.
void av_hmac_free(AVHMAC *ctx)
Free an AVHMAC context.