/*
* Copyright (C) 2012-2016 Andreas Steffen
* HSR 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 pts_pcr pts_pcr
* @{ @ingroup pts
*/
#ifndef PTS_PCR_H_
#define PTS_PCR_H_
typedef struct pts_pcr_t pts_pcr_t;
#include "pts_meas_algo.h"
#include <library.h>
#include <tpm_tss.h>
#include <tpm_tss_quote_info.h>
/**
* Maximum number of PCR's of TPM, TPM Spec 1.2
*/
#define PTS_PCR_MAX_NUM 24
/**
* Class implementing a shadow PCR register set
*/
struct pts_pcr_t {
/**
* Get the hash algorithm used by the PCR bank
*
* @return hash_measurement algorithm
*/
pts_meas_algorithms_t(*get_pcr_algo)(pts_pcr_t *this);
/**
* Get the number of selected PCRs
*
* @return number of selected PCRs
*/
uint32_t (*get_count)(pts_pcr_t *this);
/**
* Mark a PCR as selected
*
* @param pcr index of PCR
* @return TRUE if PCR index exists
*/
bool (*select_pcr)(pts_pcr_t *this, uint32_t pcr);
/**
* Get the size of the selection field in bytes
*
* @return number of bytes written
*/
size_t (*get_selection_size)(pts_pcr_t *this);
/**
* Create an enumerator over all selected PCR indexes
*
* @return enumerator
*/
enumerator_t* (*create_enumerator)(pts_pcr_t *this);
/**
* Get the current content of a PCR
*
* @param pcr index of PCR
* @return content of PCR
*/
chunk_t (*get)(pts_pcr_t *this, uint32_t pcr);
/**
* Set the content of a PCR
*
* @param pcr index of PCR
* @param value new value of PCR
* @return TRUE if value could be set
*/
bool (*set)(pts_pcr_t *this, uint32_t pcr, chunk_t value);
/**
* Extend the content of a PCR
*
* @param pcr index of PCR
* @param measurement measurement value to be extended into PCR
* @return new content of PCR
*/
chunk_t (*extend)(pts_pcr_t *this, uint32_t pcr, chunk_t measurement);
/**
* Create a PCR Composite object over all selected PCRs
*
* @return PCR Composite object (must be freed)
*/
tpm_tss_pcr_composite_t* (*get_composite)(pts_pcr_t *this);
/**
* Destroys a pts_pcr_t object.
*/
void (*destroy)(pts_pcr_t *this);
};
/**
* Creates an pts_pcr_t object
*
* @param tpm_version TPM version
* @param algo Hash algorithm used by PCR bank
* @param locality TPM locality in which the PCR bank was initialized
*/
pts_pcr_t* pts_pcr_create(tpm_version_t tpm_version, pts_meas_algorithms_t algo,
uint8_t locality);
#endif /** PTS_PCR_H_ @}*/
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