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/*
* Copyright (C) 2005-2008 Martin Willi
* Copyright (C) 2005 Jan Hutter
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program 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 General Public License
* for more details.
*/
/**
* @defgroup hmac_signer hmac_signer
* @{ @ingroup hmac_p
*/
#ifndef HMAC_SIGNER_H_
#define HMAC_SIGNER_H_
typedef struct hmac_signer_t hmac_signer_t;
#include <crypto/signers/signer.h>
/**
* Implementation of signer_t interface using HMAC.
*
* HMAC uses a standard hash function implemented in a hasher_t to build a MAC.
*/
struct hmac_signer_t {
/**
* Implements signer_t interface.
*/
signer_t signer;
};
/**
* Creates a new hmac_signer_t.
*
* HMAC signatures are often truncated to shorten them to a more usable, but
* still secure enough length.
* Block size must be equal or smaller then the hash algorithms hash.
*
* @param algo algorithm to implement
* @return hmac_signer_t, NULL if not supported
*/
hmac_signer_t *hmac_signer_create(integrity_algorithm_t algo);
#endif /** HMAC_SIGNER_H_ @}*/
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