1 /* Copyright 2011 The ChromiumOS Authors
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
13 #include "2common.h"
14 #include "host_common.h"
15 #include "common/tests.h"
16 #include "tlcl.h"
17 #include "tlcl_tests.h"
18
19 #define TPM_MAX_NV_WRITES_NOOWNER 64
20
main(int argc,char ** argv)21 int main(int argc, char** argv) {
22 int i;
23
24 uint32_t result;
25
26 TlclLibInit();
27
28 TPM_CHECK(TlclStartupIfNeeded());
29 TPM_CHECK(TlclSelfTestFull());
30 TPM_CHECK(TlclAssertPhysicalPresence());
31 TPM_CHECK(TlclForceClear());
32 TPM_CHECK(TlclSetEnable());
33 TPM_CHECK(TlclSetDeactivated(0));
34
35 for (i = 0; i < TPM_MAX_NV_WRITES_NOOWNER + 2; i++) {
36 printf("writing %d\n", i);
37 if ((result = TlclWrite(INDEX0, (uint8_t*)&i,
38 sizeof(i))) != TPM_SUCCESS) {
39 switch (result) {
40 case TPM_E_MAXNVWRITES:
41 TEST_TRUE(i >= TPM_MAX_NV_WRITES_NOOWNER,
42 "MAXNVWRITES should only occur after "
43 "MAX_NV_WRITES_NOOWNER reached");
44 break;
45 default:
46 VB2_DEBUG("unexpected error code %d (%#x)\n",
47 result, result);
48 exit(1);
49 }
50 }
51 }
52
53 /* Reset write count */
54 TPM_CHECK(TlclForceClear());
55 TPM_CHECK(TlclSetEnable());
56 TPM_CHECK(TlclSetDeactivated(0));
57
58 /* Try writing again. */
59 TPM_CHECK(TlclWrite(INDEX0, (uint8_t*)&i, sizeof(i)));
60
61 printf("TEST SUCCEEDED\n");
62 exit(0);
63 }
64