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/*
* HMAC implementation based on OpenBSD
*
* Copyright (c) 2012 Daniel Farina
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/**
* @file
* HMAC-SHA1 implementation (RFC2104).
*/
#ifndef _USUAL_CRYPTO_HMAC_H_
#define _USUAL_CRYPTO_HMAC_H_
#include <usual/crypto/digest.h>
/** HMAC Context */
struct HMAC;
/** Create context with key */
struct HMAC *hmac_new(const struct DigestInfo *impl,
const void *key, unsigned int key_len,
CxMem *cx);
/** Initialize context */
void hmac_reset(struct HMAC *ctx);
/** Hash more data */
void hmac_update(struct HMAC *ctx, const void *data, unsigned int len);
/** Get final result */
void hmac_final(struct HMAC *ctx, uint8_t *dst);
unsigned hmac_block_len(struct HMAC *ctx);
unsigned hmac_result_len(struct HMAC *ctx);
#endif /* _USUAL_HMAC_H_ */
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