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/*
* Copyright (C) 2012 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 <library.h>
/**
* Maximum number of PCR's of TPM, TPM Spec 1.2
*/
#define PTS_PCR_MAX_NUM 24
/**
* Number of bytes that can be saved in a PCR of TPM, TPM Spec 1.2
*/
#define PTS_PCR_LEN 20
/**
* Class implementing a shadow PCR register set
*/
struct pts_pcr_t {
/**
* Get the number of selected PCRs
*
* @return number of selected PCRs
*/
u_int32_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, u_int32_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, u_int32_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, u_int32_t pcr, chunk_t value);
/**
* Extend the content of a PCR
*
* @param pcr index of PCR
* @param measurement measurment value to be extended into PCR
* @return new content of PCR
*/
chunk_t (*extend)(pts_pcr_t *this, u_int32_t pcr, chunk_t measurement);
/**
* Create a PCR Composite object over all selected PCRs
*
* @return PCR Composite object (must be freed)
*/
chunk_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
*/
pts_pcr_t* pts_pcr_create(void);
#endif /** PTS_PCR_H_ @}*/
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