// 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 "PolicyAuthValue_fp.h"

#include "Policy_spt_fp.h"

TPM_RC

TPM2_PolicyAuthValue(

   PolicyAuthValue_In    *in            // IN: input parameter list

   )

{

   SESSION               *session;

   TPM_CC                 commandCode = TPM_CC_PolicyAuthValue;

   HASH_STATE             hashState;

// Internal Data Update

   // Get pointer to the session structure

   session = SessionGet(in->policySession);

   // Update policy hash

   // policyDigestnew = hash(policyDigestold || TPM_CC_PolicyAuthValue)

   //   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 hash and get the results

   CryptCompleteHash2B(&hashState, &session->u2.policyDigest.b);

   // update isAuthValueNeeded bit in the session context

   session->attributes.isAuthValueNeeded = SET;

   session->attributes.isPasswordNeeded = CLEAR;

   return TPM_RC_SUCCESS;

}