tests/tpm_lite/tpmtest_fastenable.c

/* 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.
 */

/* Testing: ForceClear and behavior of disable and permanent deactivated flags.
 *
 * ForceClear sets the permanent disable and deactivated flags to their default
 * value of TRUE.  The specs say nothing about STCLEAR flags, so they should be
 * left alone.  This test checks that both flags may be reset without a reboot,
 * resulting in a fully enabled and activated TPM.  (We know that because
 * ForceClear requires that the TPM be enabled and activated to run.)
 */

#include <stdio.h>

#include "host_common.h"
#include "tlcl.h"
#include "tlcl_tests.h"

int main(int argc, char** argv) {
  uint8_t disable, deactivated;
  int i;

  TlclLibInit();
  TPM_CHECK(TlclStartupIfNeeded());
  TPM_CHECK(TlclSelfTestFull());
  TPM_CHECK(TlclAssertPhysicalPresence());
  TPM_CHECK(TlclGetFlags(&disable, &deactivated, NULL));
  printf("disable is %d, deactivated is %d\n", disable, deactivated);

  for (i = 0; i < 2; i++) {
    TPM_CHECK(TlclForceClear());
    TPM_CHECK(TlclGetFlags(&disable, &deactivated, NULL));
    printf("disable is %d, deactivated is %d\n", disable, deactivated);
    VbAssert(disable == 1 && deactivated == 1);
    TPM_CHECK(TlclSetEnable());
    TPM_CHECK(TlclSetDeactivated(0));
    TPM_CHECK(TlclGetFlags(&disable, &deactivated, NULL));
    printf("disable is %d, deactivated is %d\n", disable, deactivated);
    VbAssert(disable == 0 && deactivated == 0);
  }

  printf("TEST SUCCEEDED\n");
  return 0;
}