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_SetAuthPolicy_fp.h"
37
38 #if CC_PCR_SetAuthPolicy // Conditional expansion of this file
39
40 /*(See part 3 specification)
41 // Set authPolicy to a group of PCR
42 */
43 // Return Type: TPM_RC
44 // TPM_RC_SIZE size of 'authPolicy' is not the size of a digest
45 // produced by 'policyDigest'
46 // TPM_RC_VALUE PCR referenced by 'pcrNum' is not a member
47 // of a PCR policy group
48 TPM_RC
TPM2_PCR_SetAuthPolicy(PCR_SetAuthPolicy_In * in)49 TPM2_PCR_SetAuthPolicy(
50 PCR_SetAuthPolicy_In *in // IN: input parameter list
51 )
52 {
53 UINT32 groupIndex;
54
55 // The command needs NV update. Check if NV is available.
56 // A TPM_RC_NV_UNAVAILABLE or TPM_RC_NV_RATE error may be returned at
57 // this point
58 RETURN_IF_NV_IS_NOT_AVAILABLE;
59
60 // Input Validation:
61
62 // Check the authPolicy consistent with hash algorithm
63 if(in->authPolicy.t.size != CryptHashGetDigestSize(in->hashAlg))
64 return TPM_RCS_SIZE + RC_PCR_SetAuthPolicy_authPolicy;
65
66 // If PCR does not belong to a policy group, return TPM_RC_VALUE
67 if(!PCRBelongsPolicyGroup(in->pcrNum, &groupIndex))
68 return TPM_RCS_VALUE + RC_PCR_SetAuthPolicy_pcrNum;
69
70 // Internal Data Update
71
72 // Set PCR policy
73 gp.pcrPolicies.hashAlg[groupIndex] = in->hashAlg;
74 gp.pcrPolicies.policy[groupIndex] = in->authPolicy;
75
76 // Save new policy to NV
77 NV_SYNC_PERSISTENT(pcrPolicies);
78
79 return TPM_RC_SUCCESS;
80 }
81
82 #endif // CC_PCR_SetAuthPolicy