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_Write_fp.h" |
| 10 | #include "NV_spt_fp.h" |
| 11 | // |
| 12 | // |
| 13 | // Error Returns Meaning |
| 14 | // |
| 15 | // TPM_RC_ATTRIBUTES Index referenced by nvIndex has either TPMA_NV_BITS, |
| 16 | // TPMA_NV_COUNTER, or TPMA_NV_EVENT attribute SET |
| 17 | // TPM_RC_NV_AUTHORIZATION the authorization was valid but the authorizing entity (authHandle) is |
| 18 | // not allowed to write to the Index referenced by nvIndex |
| 19 | // TPM_RC_NV_LOCKED Index referenced by nvIndex is write locked |
| 20 | // TPM_RC_NV_RANGE if TPMA_NV_WRITEALL is SET then the write is not the size of the |
| 21 | // Index referenced by nvIndex; otherwise, the write extends beyond the |
| 22 | // limits of the Index |
| 23 | // |
| 24 | TPM_RC |
| 25 | TPM2_NV_Write( |
| 26 | NV_Write_In *in // IN: input parameter list |
| 27 | ) |
| 28 | { |
| 29 | NV_INDEX nvIndex; |
| 30 | TPM_RC result; |
| 31 | |
| 32 | // Input Validation |
| 33 | |
| 34 | // Get NV index info |
| 35 | NvGetIndexInfo(in->nvIndex, &nvIndex); |
| 36 | |
| 37 | // common access checks. NvWrtieAccessChecks() may return |
| 38 | // TPM_RC_NV_AUTHORIZATION or TPM_RC_NV_LOCKED |
| 39 | result = NvWriteAccessChecks(in->authHandle, in->nvIndex); |
| 40 | if(result != TPM_RC_SUCCESS) |
| 41 | return result; |
| 42 | |
| 43 | // Bits index, extend index or counter index may not be updated by |
| 44 | // TPM2_NV_Write |
| 45 | if( nvIndex.publicArea.attributes.TPMA_NV_COUNTER == SET |
| 46 | || nvIndex.publicArea.attributes.TPMA_NV_BITS == SET |
| 47 | || nvIndex.publicArea.attributes.TPMA_NV_EXTEND == SET) |
| 48 | return TPM_RC_ATTRIBUTES; |
| 49 | |
| 50 | // Too much data |
| 51 | if((in->data.t.size + in->offset) > nvIndex.publicArea.dataSize) |
| 52 | return TPM_RC_NV_RANGE; |
| 53 | |
| 54 | // If this index requires a full sized write, make sure that input range is |
| 55 | // full sized |
| 56 | if( nvIndex.publicArea.attributes.TPMA_NV_WRITEALL == SET |
| 57 | && in->data.t.size < nvIndex.publicArea.dataSize) |
| 58 | return TPM_RC_NV_RANGE; |
| 59 | |
| 60 | // Internal Data Update |
| 61 | |
| 62 | // Perform the write. This called routine will SET the TPMA_NV_WRITTEN |
| 63 | // attribute if it has not already been SET. If NV isn't available, an error |
| 64 | // will be returned. |
| 65 | return NvWriteIndexData(in->nvIndex, &nvIndex, in->offset, |
| 66 | in->data.t.size, in->data.t.buffer); |
| 67 | |
| 68 | } |