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 "SetCommandCodeAuditStatus_fp.h"
37
38 #if CC_SetCommandCodeAuditStatus // Conditional expansion of this file
39
40 /*(See part 3 specification)
41 // change the audit status of a command or to set the hash algorithm used for
42 // the audit digest.
43 */
44 TPM_RC
TPM2_SetCommandCodeAuditStatus(SetCommandCodeAuditStatus_In * in)45 TPM2_SetCommandCodeAuditStatus(
46 SetCommandCodeAuditStatus_In *in // IN: input parameter list
47 )
48 {
49
50 // The command needs NV update. Check if NV is available.
51 // A TPM_RC_NV_UNAVAILABLE or TPM_RC_NV_RATE error may be returned at
52 // this point
53 RETURN_IF_NV_IS_NOT_AVAILABLE;
54
55 // Internal Data Update
56
57 // Update hash algorithm
58 if(in->auditAlg != TPM_ALG_NULL && in->auditAlg != gp.auditHashAlg)
59 {
60 // Can't change the algorithm and command list at the same time
61 if(in->setList.count != 0 || in->clearList.count != 0)
62 return TPM_RCS_VALUE + RC_SetCommandCodeAuditStatus_auditAlg;
63
64 // Change the hash algorithm for audit
65 gp.auditHashAlg = in->auditAlg;
66
67 // Set the digest size to a unique value that indicates that the digest
68 // algorithm has been changed. The size will be cleared to zero in the
69 // command audit processing on exit.
70 gr.commandAuditDigest.t.size = 1;
71
72 // Save the change of command audit data (this sets g_updateNV so that NV
73 // will be updated on exit.)
74 NV_SYNC_PERSISTENT(auditHashAlg);
75 }
76 else
77 {
78 UINT32 i;
79 BOOL changed = FALSE;
80
81 // Process set list
82 for(i = 0; i < in->setList.count; i++)
83
84 // If change is made in CommandAuditSet, set changed flag
85 if(CommandAuditSet(in->setList.commandCodes[i]))
86 changed = TRUE;
87
88 // Process clear list
89 for(i = 0; i < in->clearList.count; i++)
90 // If change is made in CommandAuditClear, set changed flag
91 if(CommandAuditClear(in->clearList.commandCodes[i]))
92 changed = TRUE;
93
94 // if change was made to command list, update NV
95 if(changed)
96 // this sets g_updateNV so that NV will be updated on exit.
97 NV_SYNC_PERSISTENT(auditCommands);
98 }
99
100 return TPM_RC_SUCCESS;
101 }
102
103 #endif // CC_SetCommandCodeAuditStatus