1 /* Microsoft Reference Implementation for TPM 2.0
2 *
3 * The copyright in this software is being made available under the BSD License,
4 * included below. This software may be subject to other third party and
5 * contributor rights, including patent rights, and no such rights are granted
6 * under this license.
7 *
8 * Copyright (c) Microsoft Corporation
9 *
10 * All rights reserved.
11 *
12 * BSD License
13 *
14 * Redistribution and use in source and binary forms, with or without modification,
15 * are permitted provided that the following conditions are met:
16 *
17 * Redistributions of source code must retain the above copyright notice, this list
18 * of conditions and the following disclaimer.
19 *
20 * Redistributions in binary form must reproduce the above copyright notice, this
21 * list of conditions and the following disclaimer in the documentation and/or
22 * other materials provided with the distribution.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ""AS IS""
25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
27 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
28 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
29 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
30 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
31 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 */
35 #include "Tpm.h"
36
37 // This function is called to process a _TPM_Hash_Data indication.
38 LIB_EXPORT void
_TPM_Hash_Data(uint32_t dataSize,unsigned char * data)39 _TPM_Hash_Data(
40 uint32_t dataSize, // IN: size of data to be extend
41 unsigned char *data // IN: data buffer
42 )
43 {
44 UINT32 i;
45 HASH_OBJECT *hashObject;
46 TPMI_DH_PCR pcrHandle = TPMIsStarted()
47 ? PCR_FIRST + DRTM_PCR : PCR_FIRST + HCRTM_PCR;
48
49 // If there is no DRTM sequence object, then _TPM_Hash_Start
50 // was not called so this function returns without doing
51 // anything.
52 if(g_DRTMHandle == TPM_RH_UNASSIGNED)
53 return;
54
55 hashObject = (HASH_OBJECT *)HandleToObject(g_DRTMHandle);
56 pAssert(hashObject->attributes.eventSeq);
57
58 // For each of the implemented hash algorithms, update the digest with the
59 // data provided.
60 for(i = 0; i < HASH_COUNT; i++)
61 {
62 // make sure that the PCR is implemented for this algorithm
63 if(PcrIsAllocated(pcrHandle,
64 hashObject->state.hashState[i].hashAlg))
65 // Update sequence object
66 CryptDigestUpdate(&hashObject->state.hashState[i], dataSize, data);
67 }
68
69 return;
70 }