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// 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 "PCR_SetAuthPolicy_fp.h"
//
//
// Error Returns Meaning
//
// TPM_RC_SIZE size of authPolicy is not the size of a digest produced by policyDigest
// TPM_RC_VALUE PCR referenced by pcrNum is not a member of a PCR policy group
//
TPM_RC
TPM2_PCR_SetAuthPolicy(
PCR_SetAuthPolicy_In *in // IN: input parameter list
)
{
UINT32 groupIndex;
TPM_RC result;
// 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;
// Input Validation:
// Check the authPolicy consistent with hash algorithm
if(in->authPolicy.t.size != CryptGetHashDigestSize(in->hashAlg))
return TPM_RC_SIZE + RC_PCR_SetAuthPolicy_authPolicy;
// If PCR does not belong to a policy group, return TPM_RC_VALUE
if(!PCRBelongsPolicyGroup(in->pcrNum, &groupIndex))
return TPM_RC_VALUE + RC_PCR_SetAuthPolicy_pcrNum;
// Internal Data Update
// Set PCR policy
gp.pcrPolicies.hashAlg[groupIndex] = in->hashAlg;
gp.pcrPolicies.policy[groupIndex] = in->authPolicy;
// Save new policy to NV
NvWriteReserved(NV_PCR_POLICIES, &gp.pcrPolicies);
return TPM_RC_SUCCESS;
}
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