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 "PCR_Reset_fp.h" 10 // 11 // 12 // Error Returns Meaning 13 // 14 // TPM_RC_LOCALITY current command locality is not allowed to reset the PCR referenced 15 // by pcrHandle 16 // 17 TPM_RC 18 TPM2_PCR_Reset( 19 PCR_Reset_In *in // IN: input parameter list 20 ) 21 { 22 TPM_RC result; 23 24 // Input Validation 25 26 // Check if the reset operation is allowed by the current command locality 27 if(!PCRIsResetAllowed(in->pcrHandle)) 28 return TPM_RC_LOCALITY; 29 30 // If PCR is state saved and we need to update orderlyState, check NV 31 // availability 32 if(PCRIsStateSaved(in->pcrHandle) && gp.orderlyState != SHUTDOWN_NONE) 33 { 34 result = NvIsAvailable(); 35 if(result != TPM_RC_SUCCESS) 36 return result; 37 g_clearOrderly = TRUE; 38 } 39 40 // Internal Data Update 41 42 // Reset selected PCR in all banks to 0 43 PCRSetValue(in->pcrHandle, 0); 44 45 // Indicate that the PCR changed so that pcrCounter will be incremented if 46 // necessary. 47 PCRChanged(in->pcrHandle); 48 49 return TPM_RC_SUCCESS; 50 } 51
