// 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 "PolicyOR_fp.h"

#include "Policy_spt_fp.h"

//

//

//     Error Returns                 Meaning

//

//     TPM_RC_VALUE                  no digest in pHashList matched the current value of policyDigest for

//                                   policySession

//

TPM_RC

TPM2_PolicyOR(

   PolicyOR_In      *in               // IN: input parameter list

   )

{

   SESSION       *session;

   UINT32         i;

// Input Validation and Update

   // Get pointer to the session structure

   session = SessionGet(in->policySession);

   // Compare and Update Internal Session policy if match

   for(i = 0; i < in->pHashList.count; i++)

   {

       if(   session->attributes.isTrialPolicy == SET

          || (Memory2BEqual(&session->u2.policyDigest.b,

                            &in->pHashList.digests[i].b))

         )

       {

           // Found a match

           HASH_STATE      hashState;

           TPM_CC          commandCode = TPM_CC_PolicyOR;

             // Start hash

             session->u2.policyDigest.t.size = CryptStartHash(session->authHashAlg,

                                                            &hashState);

             // Set policyDigest to 0 string and add it to hash

             MemorySet(session->u2.policyDigest.t.buffer, 0,

                       session->u2.policyDigest.t.size);

             CryptUpdateDigest2B(&hashState, &session->u2.policyDigest.b);

             // add command code

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

             // Add each of the hashes in the list

             for(i = 0; i < in->pHashList.count; i++)

             {

                 // Extend policyDigest

                 CryptUpdateDigest2B(&hashState, &in->pHashList.digests[i].b);

             }

             // Complete digest

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

             return TPM_RC_SUCCESS;

       }

   }

   // None of the values in the list matched the current policyDigest

   return TPM_RC_VALUE + RC_PolicyOR_pHashList;

}