115 lines
3.3 KiB
C
115 lines
3.3 KiB
C
/*
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* Copyright (C) 2011 Sansar Choinyambuu
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* Copyright (C) 2011-2014 Andreas Steffen
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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 pts_meas_algo pts_meas_algo
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* @{ @ingroup pts
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*/
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#ifndef PTS_MEAS_ALGO_H_
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#define PTS_MEAS_ALGO_H_
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#include <library.h>
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#include <crypto/hashers/hasher.h>
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typedef enum pts_meas_algorithms_t pts_meas_algorithms_t;
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/**
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* PTS Measurement Algorithms
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*/
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enum pts_meas_algorithms_t {
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PTS_MEAS_ALGO_NONE = 0,
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PTS_MEAS_ALGO_SHA384 = (1<<13),
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PTS_MEAS_ALGO_SHA256 = (1<<14),
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PTS_MEAS_ALGO_SHA1 = (1<<15)
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};
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/**
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* enum name for pts_meas_algorithms_t.
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*/
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extern enum_name_t *pts_meas_algorithm_names;
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/**
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* Diffie-Hellman Hash Algorithm Values
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* see section 3.8.5 of PTS Protocol: Binding to TNC IF-M Specification
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*
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* 1
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* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* |1|2|3|R|R|R|R|R|R|R|R|R|R|R|R|R|
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*
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*/
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/**
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* Probe available PTS measurement algorithms
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*
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* @param algorithms set of available algorithms
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* @return TRUE if mandatory algorithms are available
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*/
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bool pts_meas_algo_probe(pts_meas_algorithms_t *algorithms);
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/**
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* Update supported PTS measurement algorithms according to configuration
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*
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* sha1 : PTS_MEAS_ALGO_SHA1
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* sha256: PTS_MEAS_ALGO_SHA1 | PTS_MEAS_ALGO_SHA256
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* sha384: PTS_MEAS_ALGO_SHA1 | PTS_MEAS_ALGO_SHA256 | PTS_MEAS_ALGO_SHA384
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*
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* The PTS-IMC is expected to select the strongest supported algorithm
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*
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* @param hash_alg configured hash algorithm
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* @param algorithms returns set of available PTS measurement algorithms
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*/
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bool pts_meas_algo_update(char *hash_alg, pts_meas_algorithms_t *algorithms);
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/**
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* Select the strongest PTS measurement algorithm
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* among a set of offered PTS measurement algorithms
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*
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* @param supported_algos set of supported PTS measurement algorithms
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* @param offered_algos set of offered PTS measurements algorithms
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* @return selected algorithm
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*/
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pts_meas_algorithms_t pts_meas_algo_select(pts_meas_algorithms_t supported_algos,
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pts_meas_algorithms_t offered_algos);
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/**
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* Convert pts_meas_algorithms_t to hash_algorithm_t
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*
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* @param algorithm PTS measurement algorithm type
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* @return libstrongswan hash algorithm type
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*/
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hash_algorithm_t pts_meas_algo_to_hash(pts_meas_algorithms_t algorithm);
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/**
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* Convert hash_algorithm_t to pts_meas_algorithms_t
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*
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* @param algorithm PTS measurement algorithm type
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* @return libstrongswan hash algorithm type
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*/
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pts_meas_algorithms_t pts_meas_algo_from_hash(hash_algorithm_t algorithm);
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/**
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* Return the hash size of a pts_meas_algorithm
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*
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* @param algorithm PTS measurement algorithm type
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* @return hash size in bytes
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*/
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size_t pts_meas_algo_hash_size(pts_meas_algorithms_t algorithm);
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#endif /** PTS_MEAS_ALGO_H_ @}*/
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