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_Extend_fp.h"
37
38 #if CC_PCR_Extend // 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_Extend(PCR_Extend_In * in)47 TPM2_PCR_Extend(
48 PCR_Extend_In *in // IN: input parameter list
49 )
50 {
51 UINT32 i;
52
53 // Input Validation
54
55 // NOTE: This function assumes that the unmarshaling function for 'digests' will
56 // have validated that all of the indicated hash algorithms are valid. If the
57 // hash algorithms are correct, the unmarshaling code will unmarshal a digest
58 // of the size indicated by the hash algorithm. If the overall size is not
59 // consistent, the unmarshaling code will run out of input data or have input
60 // data left over. In either case, it will cause an unmarshaling error and this
61 // function will not be called.
62
63 // For NULL handle, do nothing and return success
64 if(in->pcrHandle == TPM_RH_NULL)
65 return TPM_RC_SUCCESS;
66
67 // Check if the extend operation is allowed by the current command locality
68 if(!PCRIsExtendAllowed(in->pcrHandle))
69 return TPM_RC_LOCALITY;
70
71 // If PCR is state saved and we need to update orderlyState, check NV
72 // availability
73 if(PCRIsStateSaved(in->pcrHandle))
74 RETURN_IF_ORDERLY;
75
76 // Internal Data Update
77
78 // Iterate input digest list to extend
79 for(i = 0; i < in->digests.count; i++)
80 {
81 PCRExtend(in->pcrHandle, in->digests.digests[i].hashAlg,
82 CryptHashGetDigestSize(in->digests.digests[i].hashAlg),
83 (BYTE *)&in->digests.digests[i].digest);
84 }
85
86 return TPM_RC_SUCCESS;
87 }
88
89 #endif // CC_PCR_Extend