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/*
* Copyright (c) 2010-2012 United States Government, as represented by
* the Secretary of Defense. All rights reserved.
*
* THIS SOFTWARE AND ITS DOCUMENTATION ARE PROVIDED AS IS AND WITHOUT
* ANY EXPRESS OR IMPLIED WARRANTIES WHATSOEVER. ALL WARRANTIES
* INCLUDING, BUT NOT LIMITED TO, PERFORMANCE, MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT ARE HEREBY
* DISCLAIMED. USERS ASSUME THE ENTIRE RISK AND LIABILITY OF USING THE
* SOFTWARE.
*/
#include "vtpm_pcrs.h"
#include "vtpm_cmd.h"
#include "tpm/tpm_data.h"
#define PCR_VALUE tpmData.permanent.data.pcrValue
static int write_pcr_direct(unsigned int pcrIndex, uint8_t* val) {
if(pcrIndex > TPM_NUM_PCR) {
return TPM_BADINDEX;
}
memcpy(&PCR_VALUE[pcrIndex], val, sizeof(TPM_PCRVALUE));
return TPM_SUCCESS;
}
TPM_RESULT vtpm_initialize_hw_pcrs(struct tpmfront_dev* tpmfront_dev, unsigned long pcrs)
{
TPM_RESULT rc = TPM_SUCCESS;
uint8_t digest[sizeof(TPM_PCRVALUE)];
for(unsigned int i = 0; i < TPM_NUM_PCR; ++i) {
if(pcrs & 1 << i) {
if((rc = VTPM_PCRRead(tpmfront_dev, i, digest)) != TPM_SUCCESS) {
error("TPM_PCRRead failed with error : %d", rc);
return rc;
}
write_pcr_direct(i, digest);
}
}
return rc;
}
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