// 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 "NV_UndefineSpace_fp.h"

//

//

//     Error Returns                     Meaning

//

//     TPM_RC_ATTRIBUTES                 TPMA_NV_POLICY_DELETE is SET in the Index referenced by

//                                       nvIndex so this command may not be used to delete this Index (see

//                                       TPM2_NV_UndefineSpaceSpecial())

//     TPM_RC_NV_AUTHORIZATION           attempt to use ownerAuth to delete an index created by the platform

//

TPM_RC

TPM2_NV_UndefineSpace(

   NV_UndefineSpace_In       *in                   // IN: input parameter list

   )

{

   TPM_RC            result;

   NV_INDEX          nvIndex;

   // The command needs NV update. Check if NV is available.

   // A TPM_RC_NV_UNAVAILABLE or TPM_RC_NV_RATE error may be returned at

   // this point

   result = NvIsAvailable();

   if(result != TPM_RC_SUCCESS) return result;

   // Indexes in the virtual range cannot be undefined.

   if (_plat__NvGetHandleVirtualOffset(in->nvIndex))

       return TPM_RC_NV_AUTHORIZATION;

   // Check if there are platform-specific reasons to prohibit updating this

   // index.

   if (!_plat__NvUpdateAllowed(in->nvIndex))

       return TPM_RC_NV_AUTHORIZATION;

// Input Validation

   // Get NV index info

   NvGetIndexInfo(in->nvIndex, &nvIndex);

   // This command can't be used to delete an index with TPMA_NV_POLICY_DELETE SET

   if(SET == nvIndex.publicArea.attributes.TPMA_NV_POLICY_DELETE)

       return TPM_RC_ATTRIBUTES + RC_NV_UndefineSpace_nvIndex;

   // The owner may only delete an index that was defined with ownerAuth. The

   // platform may delete an index that was created with either auth.

   if(   in->authHandle == TPM_RH_OWNER

      && nvIndex.publicArea.attributes.TPMA_NV_PLATFORMCREATE == SET)

       return TPM_RC_NV_AUTHORIZATION;

// Internal Data Update

   // Call implementation dependent internal routine to delete NV index

   NvDeleteEntity(in->nvIndex);

   return TPM_RC_SUCCESS;

}