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Side by Side Diff: tests/tpm_lite/writelimit.c

Issue 2919010: Add tpm lite to vboot reference (Closed) Base URL: ssh://gitrw.chromium.org/vboot_reference.git
Patch Set: Created 10 years, 5 months ago
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1 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
2 * Use of this source code is governed by a BSD-style license that can be
3 * found in the LICENSE file.
4 */
5
6 /* Test of recovery when we hit the NVRAM write limit for an unowned TPM.
7 */
8
9 #include <stdio.h>
10 #include <stdint.h>
11 #include <stdlib.h>
12 #include <tss/tcs.h>
13
14 #include "tlcl.h"
15 #include "utility.h"
16
17 #define INDEX0 0xda70
18 #define TPM_MAX_NV_WRITES_NOOWNER 64
19
20 int main(int argc, char** argv) {
21 int i;
22 uint32_t result;
23 uint8_t disable, deactivated; /* the TPM specs use these exact names */
24
25 TlclLibInit();
26
27 TlclStartup();
28 TlclSelftestfull();
29
30 TlclAssertPhysicalPresence();
31
32 result = TlclGetFlags(&disable, &deactivated);
33 printf("disable is %d, deactivated is %d\n", disable, deactivated);
34
35 if (disable || deactivated) {
36 TlclSetEnable();
37 (void) TlclSetDeactivated(0);
38 printf("TPM will be active after next reboot\n");
39 exit(0);
40 }
41
42 for (i = 0; i < TPM_MAX_NV_WRITES_NOOWNER + 2; i++) {
43 printf("writing %d\n", i);
44 if ((result = TlclWrite(INDEX0, (uint8_t*)&i, sizeof(i))) != TPM_SUCCESS) {
45 switch (result) {
46 case TPM_E_MAXNVWRITES:
47 printf("Max NV writes exceeded - forcing clear\n");
48 TlclForceClear();
49 printf("Please reboot and run this program again\n");
50 exit(0);
51 default:
52 error("unexpected error code %d (0x%x)\n");
53 }
54 }
55 }
56
57 /* Done for now.
58 */
59 printf("Test completed successfully\n");
60 exit(0);
61 }
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