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
TPM2_NV_Write(NV_Write_In * in)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 }
69