| // 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 "ClockSet_fp.h" |
| // |
| // Read the current TPMS_TIMER_INFO structure settings |
| // |
| // Error Returns Meaning |
| // |
| // TPM_RC_VALUE invalid new clock |
| // |
| TPM_RC |
| TPM2_ClockSet( |
| ClockSet_In *in // IN: input parameter list |
| ) |
| { |
| #define CLOCK_UPDATE_MASK ((1ULL << NV_CLOCK_UPDATE_INTERVAL)- 1) |
| UINT64 clockNow; |
| |
| // Input Validation |
| |
| // new time can not be bigger than 0xFFFF000000000000 or smaller than |
| // current clock |
| if(in->newTime > 0xFFFF000000000000ULL |
| || in->newTime < go.clock) |
| return TPM_RC_VALUE + RC_ClockSet_newTime; |
| |
| // Internal Data Update |
| |
| // Internal Data Update |
| clockNow = go.clock; // grab the old value |
| go.clock = in->newTime; // set the new value |
| // Check to see if the update has caused a need for an nvClock update |
| if((in->newTime & CLOCK_UPDATE_MASK) > (clockNow & CLOCK_UPDATE_MASK)) |
| { |
| CryptDrbgGetPutState(GET_STATE); |
| NvWriteReserved(NV_ORDERLY_DATA, &go); |
| |
| // Now the time state is safe |
| go.clockSafe = YES; |
| } |
| |
| return TPM_RC_SUCCESS; |
| } |