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// This file was extracted from the TCG Published
// Trusted Platform Module Library
// Part 3: Commands
// Family "2.0"
// Level 00 Revision 01.16
// October 30, 2014
#include "InternalRoutines.h"
#include "PCR_Event_fp.h"
//
//
// Error Returns Meaning
//
// TPM_RC_LOCALITY current command locality is not allowed to extend the PCR
// referenced by pcrHandle
//
TPM_RC
TPM2_PCR_Event(
PCR_Event_In *in, // IN: input parameter list
PCR_Event_Out *out // OUT: output parameter list
)
{
TPM_RC result;
HASH_STATE hashState;
UINT32 i;
UINT16 size;
// Input Validation
// If a PCR extend is required
if(in->pcrHandle != TPM_RH_NULL)
{
// If the PCR is not allow to extend, return error
if(!PCRIsExtendAllowed(in->pcrHandle))
return TPM_RC_LOCALITY;
// If PCR is state saved and we need to update orderlyState, check NV
// availability
if(PCRIsStateSaved(in->pcrHandle) && gp.orderlyState != SHUTDOWN_NONE)
{
result = NvIsAvailable();
if(result != TPM_RC_SUCCESS) return result;
g_clearOrderly = TRUE;
}
}
// Internal Data Update
out->digests.count = HASH_COUNT;
// Iterate supported PCR bank algorithms to extend
for(i = 0; i < HASH_COUNT; i++)
{
TPM_ALG_ID hash = CryptGetHashAlgByIndex(i);
out->digests.digests[i].hashAlg = hash;
size = CryptStartHash(hash, &hashState);
CryptUpdateDigest2B(&hashState, &in->eventData.b);
CryptCompleteHash(&hashState, size,
(BYTE *) &out->digests.digests[i].digest);
if(in->pcrHandle != TPM_RH_NULL)
PCRExtend(in->pcrHandle, hash, size,
(BYTE *) &out->digests.digests[i].digest);
}
return TPM_RC_SUCCESS;
}
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