PolicyPhysicalPresence.c


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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 "PolicyPhysicalPresence_fp.h"
TPM_RC
TPM2_PolicyPhysicalPresence(
   PolicyPhysicalPresence_In   *in             // IN: input parameter list
   )
{
   SESSION      *session;
   TPM_CC       commandCode = TPM_CC_PolicyPhysicalPresence;
   HASH_STATE   hashState;

// Internal Data Update

   // Get pointer to the session structure
   session = SessionGet(in->policySession);

   // Update policy hash
   // policyDigestnew = hash(policyDigestold || TPM_CC_PolicyPhysicalPresence)
   // Start hash
   CryptStartHash(session->authHashAlg, &hashState);

   // add old digest
   CryptUpdateDigest2B(&hashState, &session->u2.policyDigest.b);

   // add commandCode
   CryptUpdateDigestInt(&hashState, sizeof(TPM_CC), &commandCode);

   // complete the digest
   CryptCompleteHash2B(&hashState, &session->u2.policyDigest.b);

   // update session attribute
   session->attributes.isPPRequired = SET;

   return TPM_RC_SUCCESS;
}