57 lines
1.6 KiB
C
57 lines
1.6 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 "PolicyCommandCode_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_VALUE commandCode of policySession previously set to a different value
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//
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TPM_RC
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TPM2_PolicyCommandCode(
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PolicyCommandCode_In *in // IN: input parameter list
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)
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{
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SESSION *session;
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TPM_CC commandCode = TPM_CC_PolicyCommandCode;
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HASH_STATE hashState;
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// Input validation
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// Get pointer to the session structure
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session = SessionGet(in->policySession);
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if(session->commandCode != 0 && session->commandCode != in->code)
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return TPM_RC_VALUE + RC_PolicyCommandCode_code;
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if(!CommandIsImplemented(in->code))
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return TPM_RC_POLICY_CC + RC_PolicyCommandCode_code;
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// Internal Data Update
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// Update policy hash
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// policyDigestnew = hash(policyDigestold || TPM_CC_PolicyCommandCode || code)
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// Start hash
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CryptStartHash(session->authHashAlg, &hashState);
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// add old digest
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CryptUpdateDigest2B(&hashState, &session->u2.policyDigest.b);
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// add commandCode
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CryptUpdateDigestInt(&hashState, sizeof(TPM_CC), &commandCode);
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// add input commandCode
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CryptUpdateDigestInt(&hashState, sizeof(TPM_CC), &in->code);
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// complete the hash and get the results
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CryptCompleteHash2B(&hashState, &session->u2.policyDigest.b);
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// update commandCode value in session context
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session->commandCode = in->code;
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return TPM_RC_SUCCESS;
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}
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