/*
* Copyright (C) 2014 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_ima_event_list pts_ima_event_list
* @{ @ingroup pts
*/
#ifndef PTS_IMA_EVENT_LIST_H_
#define PTS_IMA_EVENT_LIST_H_
#include "pts_meas_algo.h"
#include <time.h>
#include <library.h>
typedef struct pts_ima_event_list_t pts_ima_event_list_t;
#define IMA_PCR 10
#define IMA_ALGO_LEN_MIN 5
#define IMA_ALGO_LEN_MAX 8
/**
* Class retrieving Linux IMA file measurements
*
*/
struct pts_ima_event_list_t {
/**
* Get the time the file measurements were taken
*
* @return Measurement time
*/
time_t (*get_time)(pts_ima_event_list_t *this);
/**
* Get the number of non-processed file measurements
*
* @return Number of measurements left
*/
int (*get_count)(pts_ima_event_list_t *this);
/**
* Get the next file measurement and remove it from the list
*
* @param measurement Measurement hash
* @param algo Algorithm used to compute file digests
" @param name Event name (absolute filename or boot_aggregate)
* @return Return code
*/
status_t (*get_next)(pts_ima_event_list_t *this, chunk_t *measurement,
char **algo, char **name);
/**
* Destroys a pts_ima_event_list_t object.
*/
void (*destroy)(pts_ima_event_list_t *this);
};
/**
* Create a PTS IMA runtime file measurement object
*
* @param file Pathname pointing to the IMA runtime measurements
* @param pcr_algo PCR hash measurement algorithm to be used
* @param pcr_padding Apply PCR hash padding if hash algorithm is lacking
*/
pts_ima_event_list_t* pts_ima_event_list_create(char *file,
pts_meas_algorithms_t pcr_algo, bool pcr_padding);
/**
* Generate an IMA or IMA-NG hash from an event digest and event name
*
* @param digest event digest
* @param ima_algo event digest algorithm string ("sha1:", "sha256:", etc.)
* @param ima_name event name
* @param pcr_algo hash algorithm used by TPM PCR extension
* @param hash_buf hash value to be compared with TPM measurement
* @return TRUE if computation successful
*/
bool pts_ima_event_hash(chunk_t digest, char *ima_algo, char *ima_name,
pts_meas_algorithms_t pcr_algo, char *hash_buf);
#endif /** PTS_IMA_EVENT_LIST_H_ @}*/
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