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//
24TPM_RC
25TPM2_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}
69