78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
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/*
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* Copyright (C) 2011 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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#include "tcg_pts_meas_algo.h"
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#include <debug.h>
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#include <crypto/hashers/hasher.h>
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/**
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* Described in header.
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*/
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bool tcg_pts_probe_meas_algorithms(pts_meas_algorithms_t *algorithms)
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{
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enumerator_t *enumerator;
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hash_algorithm_t hash_alg;
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const char *plugin_name;
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char format1[] = " %s PTS measurement algorithm %N[%s] available";
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char format2[] = " %s PTS measurement algorithm %N not available";
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*algorithms = 0;
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enumerator = lib->crypto->create_hasher_enumerator(lib->crypto);
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while (enumerator->enumerate(enumerator, &hash_alg, &plugin_name))
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{
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if (hash_alg == HASH_SHA1)
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{
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*algorithms |= PTS_MEAS_ALGO_SHA1;
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DBG2(DBG_TNC, format1, "mandatory", hash_algorithm_names, hash_alg,
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plugin_name);
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}
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else if (hash_alg == HASH_SHA256)
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{
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*algorithms |= PTS_MEAS_ALGO_SHA256;
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DBG2(DBG_TNC, format1, "mandatory", hash_algorithm_names, hash_alg,
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plugin_name);
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}
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else if (hash_alg == HASH_SHA384)
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{
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*algorithms |= PTS_MEAS_ALGO_SHA384;
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DBG2(DBG_TNC, format1, "optional ", hash_algorithm_names, hash_alg,
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plugin_name);
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}
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}
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enumerator->destroy(enumerator);
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if (!(*algorithms & PTS_MEAS_ALGO_SHA384))
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{
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DBG1(DBG_TNC, format2, "optional ", hash_algorithm_names, HASH_SHA384);
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}
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if ((*algorithms & PTS_MEAS_ALGO_SHA1) &&
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(*algorithms & PTS_MEAS_ALGO_SHA256))
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{
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return TRUE;
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}
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if (!(*algorithms & PTS_MEAS_ALGO_SHA1))
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{
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DBG1(DBG_TNC, format2, "mandatory", hash_algorithm_names, HASH_SHA1);
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}
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if (!(*algorithms & PTS_MEAS_ALGO_SHA256))
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{
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DBG1(DBG_TNC, format2, "mandatory", hash_algorithm_names, HASH_SHA256);
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}
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return FALSE;
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}
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