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      1 
      2 /*
      3  * Licensed Materials - Property of IBM
      4  *
      5  * trousers - An open source TCG Software Stack
      6  *
      7  * (C) Copyright International Business Machines Corp. 2004-2006
      8  *
      9  */
     10 
     11 #include <stdlib.h>
     12 #include <stdio.h>
     13 #include <string.h>
     14 #include <inttypes.h>
     15 
     16 #include "trousers/tss.h"
     17 #include "trousers/trousers.h"
     18 #include "trousers_types.h"
     19 #include "spi_utils.h"
     20 #include "capabilities.h"
     21 #include "tsplog.h"
     22 #include "obj.h"
     23 
     24 
     25 TSS_RESULT
     26 Tspi_TPM_GetEvent(TSS_HTPM hTPM,		/* in */
     27 		  UINT32 ulPcrIndex,		/* in */
     28 		  UINT32 ulEventNumber,		/* in */
     29 		  TSS_PCR_EVENT * pPcrEvent)	/* out */
     30 {
     31 	TSS_HCONTEXT tspContext;
     32 	TSS_RESULT result;
     33 	TSS_PCR_EVENT *event = NULL;
     34 
     35 	if (pPcrEvent == NULL)
     36 		return TSPERR(TSS_E_BAD_PARAMETER);
     37 
     38 	if ((result = obj_tpm_get_tsp_context(hTPM, &tspContext)))
     39 		return result;
     40 
     41 	if ((result = RPC_GetPcrEvent(tspContext, ulPcrIndex, &ulEventNumber, &event)))
     42 		return result;
     43 
     44 	memcpy(pPcrEvent, event, sizeof(TSS_PCR_EVENT));
     45 	free(event);
     46 
     47 	return TSS_SUCCESS;
     48 }
     49 
     50 TSS_RESULT
     51 Tspi_TPM_GetEvents(TSS_HTPM hTPM,			/* in */
     52 		   UINT32 ulPcrIndex,			/* in */
     53 		   UINT32 ulStartNumber,		/* in */
     54 		   UINT32 * pulEventNumber,		/* in, out */
     55 		   TSS_PCR_EVENT ** prgbPcrEvents)	/* out */
     56 {
     57 	TSS_HCONTEXT tspContext;
     58 	TSS_RESULT result;
     59 	TSS_PCR_EVENT *events = NULL;
     60 
     61 	if (pulEventNumber == NULL)
     62 		return TSPERR(TSS_E_BAD_PARAMETER);
     63 
     64 	if ((result = obj_tpm_get_tsp_context(hTPM, &tspContext)))
     65 		return result;
     66 
     67 	if (prgbPcrEvents) {
     68 		if ((result = RPC_GetPcrEventsByPcr(tspContext, ulPcrIndex, ulStartNumber,
     69 						    pulEventNumber, &events)))
     70 			return result;
     71 
     72 		*prgbPcrEvents = events;
     73 	} else {
     74 		/* if the pointer to receive events is NULL, the app only
     75 		 * wants a total number of events for this PCR. */
     76 		if ((result = RPC_GetPcrEvent(tspContext, ulPcrIndex, pulEventNumber, NULL)))
     77 			return result;
     78 	}
     79 
     80 	return TSS_SUCCESS;
     81 }
     82 
     83 TSS_RESULT
     84 Tspi_TPM_GetEventLog(TSS_HTPM hTPM,			/* in */
     85 		     UINT32 * pulEventNumber,		/* out */
     86 		     TSS_PCR_EVENT ** prgbPcrEvents)	/* out */
     87 {
     88 	TSS_HCONTEXT tspContext;
     89 	TSS_RESULT result;
     90 
     91 	if (pulEventNumber == NULL)
     92 		return TSPERR(TSS_E_BAD_PARAMETER);
     93 
     94 	if ((result = obj_tpm_get_tsp_context(hTPM, &tspContext)))
     95 		return result;
     96 
     97 	/* if the pointer to receive events is NULL, the app only wants a
     98 	 * total number of events for all PCRs. */
     99 	if (prgbPcrEvents == NULL) {
    100 		UINT16 numPcrs = get_num_pcrs(tspContext);
    101 		UINT32 i, numEvents = 0;
    102 
    103 		if (numPcrs == 0) {
    104 			LogDebugFn("Error querying the TPM for its number of PCRs");
    105 			return TSPERR(TSS_E_INTERNAL_ERROR);
    106 		}
    107 
    108 		*pulEventNumber = 0;
    109 		for (i = 0; i < numPcrs; i++) {
    110 			if ((result = RPC_GetPcrEvent(tspContext, i, &numEvents, NULL)))
    111 				return result;
    112 
    113 			*pulEventNumber += numEvents;
    114 		}
    115 	} else
    116 		return RPC_GetPcrEventLog(tspContext, pulEventNumber, prgbPcrEvents);
    117 
    118 	return TSS_SUCCESS;
    119 }
    120 
    121