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 "ClearControl_fp.h"
37
38 #if CC_ClearControl // Conditional expansion of this file
39
40 /*(See part 3 specification)
41 // Enable or disable the execution of TPM2_Clear command
42 */
43 // Return Type: TPM_RC
44 // TPM_RC_AUTH_FAIL authorization is not properly given
45 TPM_RC
TPM2_ClearControl(ClearControl_In * in)46 TPM2_ClearControl(
47 ClearControl_In *in // IN: input parameter list
48 )
49 {
50 // The command needs NV update.
51 RETURN_IF_NV_IS_NOT_AVAILABLE;
52
53 // Input Validation
54
55 // LockoutAuth may be used to set disableLockoutClear to TRUE but not to FALSE
56 if(in->auth == TPM_RH_LOCKOUT && in->disable == NO)
57 return TPM_RC_AUTH_FAIL;
58
59 // Internal Data Update
60
61 if(in->disable == YES)
62 gp.disableClear = TRUE;
63 else
64 gp.disableClear = FALSE;
65
66 // Record the change to NV
67 NV_SYNC_PERSISTENT(disableClear);
68
69 return TPM_RC_SUCCESS;
70 }
71
72 #endif // CC_ClearControl