77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
/*
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* Copyright (C) 2012 Tobias Brunner
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* Copyright (C) 2005-2008 Martin Willi
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* Copyright (C) 2005 Jan Hutter
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* HSR Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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/**
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* @defgroup mac mac
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* @{ @ingroup crypto
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*/
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#ifndef MAC_H_
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#define MAC_H_
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typedef struct mac_t mac_t;
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#include <library.h>
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/**
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* Generic interface for message authentication codes.
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*
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* Classes implementing this interface can use the PRF and signer wrappers.
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*/
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struct mac_t {
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/**
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* Generate message authentication code.
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*
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* If out is NULL, no result is given back. A next call will
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* append the data to already supplied data. If out is not NULL,
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* the MAC of all appended data is calculated, written to out and the
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* internal state is reset.
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*
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* @param data chunk of data to authenticate
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* @param out pointer where the generated bytes will be written
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* @return TRUE if MAC generated successfully
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*/
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bool (*get_mac)(mac_t *this, chunk_t data,
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uint8_t *out) __attribute__((warn_unused_result));
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/**
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* Get the size of the resulting MAC.
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*
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* @return block size in bytes
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*/
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size_t (*get_mac_size)(mac_t *this);
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/**
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* Set the key to be used for the MAC.
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*
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* Any key length must be accepted.
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*
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* @param key key to set
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* @return TRUE if key set successfully
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*/
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bool (*set_key)(mac_t *this,
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chunk_t key) __attribute__((warn_unused_result));
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/**
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* Destroys a mac_t object.
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*/
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void (*destroy) (mac_t *this);
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};
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#endif /** MAC_H_ @}*/
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