63 lines
2 KiB
C
63 lines
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 "PCR_Extend_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_LOCALITY current command locality is not allowed to extend the PCR
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// referenced by pcrHandle
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//
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TPM_RC
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TPM2_PCR_Extend(
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PCR_Extend_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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UINT32 i;
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// Input Validation
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// NOTE: This function assumes that the unmarshaling function for 'digests' will
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// have validated that all of the indicated hash algorithms are valid. If the
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// hash algorithms are correct, the unmarshaling code will unmarshal a digest
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// of the size indicated by the hash algorithm. If the overall size is not
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// consistent, the unmarshaling code will run out of input data or have input
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// data left over. In either case, it will cause an unmarshaling error and this
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// function will not be called.
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// For NULL handle, do nothing and return success
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if(in->pcrHandle == TPM_RH_NULL)
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return TPM_RC_SUCCESS;
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// Check if the extend operation is allowed by the current command locality
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if(!PCRIsExtendAllowed(in->pcrHandle))
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return TPM_RC_LOCALITY;
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// If PCR is state saved and we need to update orderlyState, check NV
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// availability
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if(PCRIsStateSaved(in->pcrHandle) && gp.orderlyState != SHUTDOWN_NONE)
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{
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result = NvIsAvailable();
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if(result != TPM_RC_SUCCESS) return result;
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g_clearOrderly = TRUE;
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}
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// Internal Data Update
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// Iterate input digest list to extend
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for(i = 0; i < in->digests.count; i++)
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{
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PCRExtend(in->pcrHandle, in->digests.digests[i].hashAlg,
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CryptGetHashDigestSize(in->digests.digests[i].hashAlg),
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(BYTE *) &in->digests.digests[i].digest);
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}
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return TPM_RC_SUCCESS;
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}
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