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 "NV_Increment_fp.h" 10 #include "NV_spt_fp.h" 11 // 12 // 13 // Error Returns Meaning 14 // 15 // TPM_RC_ATTRIBUTES NV index is not a counter 16 // TPM_RC_NV_AUTHORIZATION authorization failure 17 // TPM_RC_NV_LOCKED Index is write locked 18 // 19 TPM_RC 20 TPM2_NV_Increment( 21 NV_Increment_In *in // IN: input parameter list 22 ) 23 { 24 TPM_RC result; 25 NV_INDEX nvIndex; 26 UINT64 countValue; 27 28 // Input Validation 29 30 // Common access checks, a TPM_RC_NV_AUTHORIZATION or TPM_RC_NV_LOCKED 31 // error may be returned at this point 32 result = NvWriteAccessChecks(in->authHandle, in->nvIndex); 33 if(result != TPM_RC_SUCCESS) 34 return result; 35 36 // Get NV index info 37 NvGetIndexInfo(in->nvIndex, &nvIndex); 38 39 // Make sure that this is a counter 40 if(nvIndex.publicArea.attributes.TPMA_NV_COUNTER != SET) 41 return TPM_RC_ATTRIBUTES + RC_NV_Increment_nvIndex; 42 43 // Internal Data Update 44 45 // If counter index is not been written, initialize it 46 if(nvIndex.publicArea.attributes.TPMA_NV_WRITTEN == CLEAR) 47 countValue = NvInitialCounter(); 48 else 49 // Read NV data in native format for TPM CPU. 50 NvGetIntIndexData(in->nvIndex, &nvIndex, &countValue); 51 52 // Do the increment 53 countValue++; 54 55 // If this is an orderly counter that just rolled over, need to be able to 56 // write to NV to proceed. This check is done here, because NvWriteIndexData() 57 // does not see if the update is for counter rollover. 58 if( nvIndex.publicArea.attributes.TPMA_NV_ORDERLY == SET 59 && (countValue & MAX_ORDERLY_COUNT) == 0) 60 { 61 result = NvIsAvailable(); 62 if(result != TPM_RC_SUCCESS) 63 return result; 64 65 // Need to force an NV update 66 g_updateNV = TRUE; 67 // 68 } 69 70 // Write NV data back. A TPM_RC_NV_UNAVAILABLE or TPM_RC_NV_RATE error may 71 // be returned at this point. If necessary, this function will set the 72 // TPMA_NV_WRITTEN attribute 73 return NvWriteIndexData(in->nvIndex, &nvIndex, 0, 8, &countValue); 74 75 } 76
