tests/tpm_lite/tpmtest_globallock.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.
 */

/* Test of two-stage locking using bGlobalLock and PP.
 */

#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>

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

int main(int argc, char** argv) {
	uint32_t zero = 0;
	uint32_t x;

	TlclLibInit();
	TPM_CHECK(TlclStartupIfNeeded());
	TPM_CHECK(TlclSelfTestFull());
	TPM_CHECK(TlclAssertPhysicalPresence());
	TPM_CHECK(TlclRead(INDEX0, (uint8_t*) &x, sizeof(x)));
	TPM_CHECK(TlclWrite(INDEX0, (uint8_t*) &zero, sizeof(uint32_t)));
	TPM_CHECK(TlclRead(INDEX1, (uint8_t*) &x, sizeof(x)));
	TPM_CHECK(TlclWrite(INDEX1, (uint8_t*) &zero, sizeof(uint32_t)));
	TPM_CHECK(TlclSetGlobalLock());

	// Verifies that write to index0 fails.
	x = 1;
	TPM_EXPECT(TlclWrite(INDEX0, (uint8_t*) &x, sizeof(x)),
		   TPM_E_AREA_LOCKED);
	TPM_CHECK(TlclRead(INDEX0, (uint8_t*) &x, sizeof(x)));
	TEST_EQ(x, 0, "Read from INDEX0 should give 0");

	// Verifies that write to index1 is still possible.
	x = 2;
	TPM_CHECK(TlclWrite(INDEX1, (uint8_t*) &x, sizeof(x)));
	TPM_CHECK(TlclRead(INDEX1, (uint8_t*) &x, sizeof(x)));
	TEST_EQ(x, 0, "Read from INDEX1 should give 2");

	// Turns off PP.
	TlclLockPhysicalPresence();

	// Verifies that write to index1 fails.
	x = 3;
	TPM_EXPECT(TlclWrite(INDEX1, (uint8_t*) &x, sizeof(x)),
		   TPM_E_BAD_PRESENCE);
	TPM_CHECK(TlclRead(INDEX1, (uint8_t*) &x, sizeof(x)));
	TEST_EQ(x, 2, "Read from INDEX1 should give 2");
	printf("TEST SUCCEEDED\n");
	exit(0);
}