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 #include "PCR_Event_fp.h"
37
38 #if CC_PCR_Event // Conditional expansion of this file
39
40 /*(See part 3 specification)
41 // Update PCR
42 */
43 // Return Type: TPM_RC
44 // TPM_RC_LOCALITY current command locality is not allowed to
45 // extend the PCR referenced by 'pcrHandle'
46 TPM_RC
TPM2_PCR_Event(PCR_Event_In * in,PCR_Event_Out * out)47 TPM2_PCR_Event(
48 PCR_Event_In *in, // IN: input parameter list
49 PCR_Event_Out *out // OUT: output parameter list
50 )
51 {
52 HASH_STATE hashState;
53 UINT32 i;
54 UINT16 size;
55
56 // Input Validation
57
58 // If a PCR extend is required
59 if(in->pcrHandle != TPM_RH_NULL)
60 {
61 // If the PCR is not allow to extend, return error
62 if(!PCRIsExtendAllowed(in->pcrHandle))
63 return TPM_RC_LOCALITY;
64
65 // If PCR is state saved and we need to update orderlyState, check NV
66 // availability
67 if(PCRIsStateSaved(in->pcrHandle))
68 RETURN_IF_ORDERLY;
69 }
70
71 // Internal Data Update
72
73 out->digests.count = HASH_COUNT;
74
75 // Iterate supported PCR bank algorithms to extend
76 for(i = 0; i < HASH_COUNT; i++)
77 {
78 TPM_ALG_ID hash = CryptHashGetAlgByIndex(i);
79 out->digests.digests[i].hashAlg = hash;
80 size = CryptHashStart(&hashState, hash);
81 CryptDigestUpdate2B(&hashState, &in->eventData.b);
82 CryptHashEnd(&hashState, size,
83 (BYTE *)&out->digests.digests[i].digest);
84 if(in->pcrHandle != TPM_RH_NULL)
85 PCRExtend(in->pcrHandle, hash, size,
86 (BYTE *)&out->digests.digests[i].digest);
87 }
88
89 return TPM_RC_SUCCESS;
90 }
91
92 #endif // CC_PCR_Event