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 "DictionaryAttackLockReset_fp.h"
37
38 #if CC_DictionaryAttackLockReset // Conditional expansion of this file
39
40 /*(See part 3 specification)
41 // This command cancels the effect of a TPM lockout due to a number of
42 // successive authorization failures. If this command is properly authorized,
43 // the lockout counter is set to 0.
44 */
45 TPM_RC
TPM2_DictionaryAttackLockReset(DictionaryAttackLockReset_In * in)46 TPM2_DictionaryAttackLockReset(
47 DictionaryAttackLockReset_In *in // IN: input parameter list
48 )
49 {
50 // Input parameter is not reference in command action
51 NOT_REFERENCED(in);
52
53 // The command needs NV update.
54 RETURN_IF_NV_IS_NOT_AVAILABLE;
55
56 // Internal Data Update
57
58 // Set failed tries to 0
59 gp.failedTries = 0;
60
61 // Record the changes to NV
62 NV_SYNC_PERSISTENT(failedTries);
63
64 return TPM_RC_SUCCESS;
65 }
66
67 #endif // CC_DictionaryAttackLockReset