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/* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Test of recovery when we hit the NVRAM write limit for an unowned TPM.
*/
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include "host_common.h"
#include "tlcl.h"
#include "tlcl_tests.h"
#define TPM_MAX_NV_WRITES_NOOWNER 64
int main(int argc, char** argv) {
int i;
uint32_t result;
TlclLibInit();
TPM_CHECK(TlclStartupIfNeeded());
TPM_CHECK(TlclSelfTestFull());
TPM_CHECK(TlclAssertPhysicalPresence());
TPM_CHECK(TlclForceClear());
TPM_CHECK(TlclSetEnable());
TPM_CHECK(TlclSetDeactivated(0));
for (i = 0; i < TPM_MAX_NV_WRITES_NOOWNER + 2; i++) {
printf("writing %d\n", i);
if ((result = TlclWrite(INDEX0, (uint8_t*)&i, sizeof(i))) != TPM_SUCCESS) {
switch (result) {
case TPM_E_MAXNVWRITES:
VbAssert(i >= TPM_MAX_NV_WRITES_NOOWNER);
break;
default:
VbExError("unexpected error code %d (0x%x)\n", result, result);
}
}
}
/* Reset write count */
TPM_CHECK(TlclForceClear());
TPM_CHECK(TlclSetEnable());
TPM_CHECK(TlclSetDeactivated(0));
/* Try writing again. */
TPM_CHECK(TlclWrite(INDEX0, (uint8_t*)&i, sizeof(i)));
printf("TEST SUCCEEDED\n");
exit(0);
}
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