crypto/external/cpl/trousers/dist/src/tspi/tspi_pcr_events.c
author yamt <yamt@NetBSD.org>
Tue, 17 Apr 2012 00:01:34 +0000
branchyamt-pagecache
changeset 280360 e98874280705
permissions -rw-r--r--
sync with head


/*
 * Licensed Materials - Property of IBM
 *
 * trousers - An open source TCG Software Stack
 *
 * (C) Copyright International Business Machines Corp. 2004-2006
 *
 */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>

#include "trousers/tss.h"
#include "trousers/trousers.h"
#include "trousers_types.h"
#include "spi_utils.h"
#include "capabilities.h"
#include "tsplog.h"
#include "obj.h"


TSS_RESULT
Tspi_TPM_GetEvent(TSS_HTPM hTPM,		/* in */
		  UINT32 ulPcrIndex,		/* in */
		  UINT32 ulEventNumber,		/* in */
		  TSS_PCR_EVENT * pPcrEvent)	/* out */
{
	TSS_HCONTEXT tspContext;
	TSS_RESULT result;
	TSS_PCR_EVENT *event = NULL;

	if (pPcrEvent == NULL)
		return TSPERR(TSS_E_BAD_PARAMETER);

	if ((result = obj_tpm_get_tsp_context(hTPM, &tspContext)))
		return result;

	if ((result = RPC_GetPcrEvent(tspContext, ulPcrIndex, &ulEventNumber, &event)))
		return result;

	memcpy(pPcrEvent, event, sizeof(TSS_PCR_EVENT));
	free(event);

	return TSS_SUCCESS;
}

TSS_RESULT
Tspi_TPM_GetEvents(TSS_HTPM hTPM,			/* in */
		   UINT32 ulPcrIndex,			/* in */
		   UINT32 ulStartNumber,		/* in */
		   UINT32 * pulEventNumber,		/* in, out */
		   TSS_PCR_EVENT ** prgbPcrEvents)	/* out */
{
	TSS_HCONTEXT tspContext;
	TSS_RESULT result;
	TSS_PCR_EVENT *events = NULL;

	if (pulEventNumber == NULL)
		return TSPERR(TSS_E_BAD_PARAMETER);

	if ((result = obj_tpm_get_tsp_context(hTPM, &tspContext)))
		return result;

	if (prgbPcrEvents) {
		if ((result = RPC_GetPcrEventsByPcr(tspContext, ulPcrIndex, ulStartNumber,
						    pulEventNumber, &events)))
			return result;

		*prgbPcrEvents = events;
	} else {
		/* if the pointer to receive events is NULL, the app only
		 * wants a total number of events for this PCR. */
		if ((result = RPC_GetPcrEvent(tspContext, ulPcrIndex, pulEventNumber, NULL)))
			return result;
	}

	return TSS_SUCCESS;
}

TSS_RESULT
Tspi_TPM_GetEventLog(TSS_HTPM hTPM,			/* in */
		     UINT32 * pulEventNumber,		/* out */
		     TSS_PCR_EVENT ** prgbPcrEvents)	/* out */
{
	TSS_HCONTEXT tspContext;
	TSS_RESULT result;

	if (pulEventNumber == NULL)
		return TSPERR(TSS_E_BAD_PARAMETER);

	if ((result = obj_tpm_get_tsp_context(hTPM, &tspContext)))
		return result;

	/* if the pointer to receive events is NULL, the app only wants a
	 * total number of events for all PCRs. */
	if (prgbPcrEvents == NULL) {
		UINT16 numPcrs = get_num_pcrs(tspContext);
		UINT32 i, numEvents = 0;

		if (numPcrs == 0) {
			LogDebugFn("Error querying the TPM for its number of PCRs");
			return TSPERR(TSS_E_INTERNAL_ERROR);
		}

		*pulEventNumber = 0;
		for (i = 0; i < numPcrs; i++) {
			if ((result = RPC_GetPcrEvent(tspContext, i, &numEvents, NULL)))
				return result;

			*pulEventNumber += numEvents;
		}
	} else
		return RPC_GetPcrEventLog(tspContext, pulEventNumber, prgbPcrEvents);

	return TSS_SUCCESS;
}