1 // This file was extracted from the TCG Published 2 // Trusted Platform Module Library 3 // Part 3: Commands 4 // Family "2.0" 5 // Level 00 Revision 01.16 6 // October 30, 2014 7 8 #include "InternalRoutines.h" 9 #include "PolicyAuthValue_fp.h" 10 #include "Policy_spt_fp.h" 11 TPM_RC 12 TPM2_PolicyAuthValue( 13 PolicyAuthValue_In *in // IN: input parameter list 14 ) 15 { 16 SESSION *session; 17 TPM_CC commandCode = TPM_CC_PolicyAuthValue; 18 HASH_STATE hashState; 19 20 // Internal Data Update 21 22 // Get pointer to the session structure 23 session = SessionGet(in->policySession); 24 25 // Update policy hash 26 // policyDigestnew = hash(policyDigestold || TPM_CC_PolicyAuthValue) 27 // Start hash 28 CryptStartHash(session->authHashAlg, &hashState); 29 30 // add old digest 31 CryptUpdateDigest2B(&hashState, &session->u2.policyDigest.b); 32 33 // add commandCode 34 CryptUpdateDigestInt(&hashState, sizeof(TPM_CC), &commandCode); 35 36 // complete the hash and get the results 37 CryptCompleteHash2B(&hashState, &session->u2.policyDigest.b); 38 39 // update isAuthValueNeeded bit in the session context 40 session->attributes.isAuthValueNeeded = SET; 41 session->attributes.isPasswordNeeded = CLEAR; 42 43 return TPM_RC_SUCCESS; 44 } 45
