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 "Platform.h"
10#include "PCR_fp.h"
11//
12//     This function is called to process a _TPM_Hash_Data() indication.
13//
14void
15_TPM_Hash_Data(
16   UINT32             dataSize,        // IN: size of data to be extend
17   BYTE              *data             // IN: data buffer
18   )
19{
20   UINT32             i;
21   HASH_OBJECT       *hashObject;
22   TPMI_DH_PCR        pcrHandle = TPMIsStarted()
23                                 ? PCR_FIRST + DRTM_PCR : PCR_FIRST + HCRTM_PCR;
24
25   // If there is no DRTM sequence object, then _TPM_Hash_Start
26   // was not called so this function returns without doing
27   // anything.
28   if(g_DRTMHandle == TPM_RH_UNASSIGNED)
29       return;
30
31   hashObject = (HASH_OBJECT *)ObjectGet(g_DRTMHandle);
32   pAssert(hashObject->attributes.eventSeq);
33
34   // For each of the implemented hash algorithms, update the digest with the
35   // data provided.
36   for(i = 0; i < HASH_COUNT; i++)
37   {
38       // make sure that the PCR is implemented for this algorithm
39       if(PcrIsAllocated(pcrHandle,
40                           hashObject->state.hashState[i].state.hashAlg))
41           // Update sequence object
42           CryptUpdateDigest(&hashObject->state.hashState[i], dataSize, data);
43   }
44
45   return;
46}
47