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 "ClockSet_fp.h" 10 // 11 // Read the current TPMS_TIMER_INFO structure settings 12 // 13 // Error Returns Meaning 14 // 15 // TPM_RC_VALUE invalid new clock 16 // 17 TPM_RC 18 TPM2_ClockSet( 19 ClockSet_In *in // IN: input parameter list 20 ) 21 { 22 #define CLOCK_UPDATE_MASK ((1ULL << NV_CLOCK_UPDATE_INTERVAL)- 1) 23 UINT64 clockNow; 24 25 // Input Validation 26 27 // new time can not be bigger than 0xFFFF000000000000 or smaller than 28 // current clock 29 if(in->newTime > 0xFFFF000000000000ULL 30 || in->newTime < go.clock) 31 return TPM_RC_VALUE + RC_ClockSet_newTime; 32 33 // Internal Data Update 34 35 // Internal Data Update 36 clockNow = go.clock; // grab the old value 37 go.clock = in->newTime; // set the new value 38 // Check to see if the update has caused a need for an nvClock update 39 if((in->newTime & CLOCK_UPDATE_MASK) > (clockNow & CLOCK_UPDATE_MASK)) 40 { 41 CryptDrbgGetPutState(GET_STATE); 42 NvWriteReserved(NV_ORDERLY_DATA, &go); 43 44 // Now the time state is safe 45 go.clockSafe = YES; 46 } 47 48 return TPM_RC_SUCCESS; 49 } 50
