75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
// This file was extracted from the TCG Published
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// Trusted Platform Module Library
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// Part 3: Commands
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// Family "2.0"
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// Level 00 Revision 01.16
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// October 30, 2014
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#include "InternalRoutines.h"
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#include "NV_Increment_fp.h"
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#include "NV_spt_fp.h"
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//
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//
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// Error Returns Meaning
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//
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// TPM_RC_ATTRIBUTES NV index is not a counter
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// TPM_RC_NV_AUTHORIZATION authorization failure
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// TPM_RC_NV_LOCKED Index is write locked
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//
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TPM_RC
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TPM2_NV_Increment(
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NV_Increment_In *in // IN: input parameter list
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)
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{
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TPM_RC result;
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NV_INDEX nvIndex;
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UINT64 countValue;
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// Input Validation
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// Common access checks, a TPM_RC_NV_AUTHORIZATION or TPM_RC_NV_LOCKED
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// error may be returned at this point
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result = NvWriteAccessChecks(in->authHandle, in->nvIndex);
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if(result != TPM_RC_SUCCESS)
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return result;
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// Get NV index info
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NvGetIndexInfo(in->nvIndex, &nvIndex);
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// Make sure that this is a counter
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if(nvIndex.publicArea.attributes.TPMA_NV_COUNTER != SET)
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return TPM_RC_ATTRIBUTES + RC_NV_Increment_nvIndex;
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// Internal Data Update
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// If counter index is not been written, initialize it
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if(nvIndex.publicArea.attributes.TPMA_NV_WRITTEN == CLEAR)
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countValue = NvInitialCounter();
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else
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// Read NV data in native format for TPM CPU.
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NvGetIntIndexData(in->nvIndex, &nvIndex, &countValue);
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// Do the increment
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countValue++;
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// If this is an orderly counter that just rolled over, need to be able to
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// write to NV to proceed. This check is done here, because NvWriteIndexData()
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// does not see if the update is for counter rollover.
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if( nvIndex.publicArea.attributes.TPMA_NV_ORDERLY == SET
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&& (countValue & MAX_ORDERLY_COUNT) == 0)
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{
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result = NvIsAvailable();
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if(result != TPM_RC_SUCCESS)
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return result;
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// Need to force an NV update
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g_updateNV = TRUE;
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//
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}
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// Write NV data back. A TPM_RC_NV_UNAVAILABLE or TPM_RC_NV_RATE error may
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// be returned at this point. If necessary, this function will set the
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// TPMA_NV_WRITTEN attribute
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return NvWriteIndexData(in->nvIndex, &nvIndex, 0, 8, &countValue);
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}
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