Vadim Bendebury | 5679752 | 2015-05-20 10:32:25 -0700 | [diff] [blame] | 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 | } |