1# Copyright 2014 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
5import logging
6
7from autotest_lib.server.cros.faft.firmware_test import FirmwareTest
8
9
10class firmware_TPMKernelVersion(FirmwareTest):
11    """Dev mode will not corrupt kernel and firmware version stored in the TPM.
12
13    Automate 1.2.4 Check Kernel version in TPM is not corrupted.
14    """
15    version = 1
16    NEEDS_SERVO_USB = True
17
18    def initialize(self, host, cmdline_args):
19        """Initialize the test"""
20        super(firmware_TPMKernelVersion, self).initialize(host, cmdline_args)
21        self.switcher.setup_mode('dev')
22        # Use the USB key for Ctrl-U dev boot, not recovery.
23        self.setup_usbkey(usbkey=True, host=False, used_for_recovery=False)
24        self.original_dev_boot_usb = self.faft_client.system.get_dev_boot_usb()
25        logging.info('Original dev_boot_usb value: %s',
26                     str(self.original_dev_boot_usb))
27
28
29    def dut_run_cmd(self, command):
30        """Execute command on DUT.
31
32        @param command: shell command to be executed on DUT.
33        @returns command output.
34        """
35        logging.info('Execute %s', command)
36        output = self.faft_client.system.run_shell_command_get_output(command)
37        logging.info('Output %s', output)
38        return output
39
40    def cleanup(self):
41        """Reboot device from SSD."""
42        try:
43            self.ensure_dev_internal_boot(self.original_dev_boot_usb)
44        except Exception as e:
45            logging.error("Caught exception: %s", str(e))
46        super(firmware_TPMKernelVersion, self).cleanup()
47
48    def run_once(self):
49        """Main test logic"""
50        # Get the kernel version and its datakey version.
51        # TODO(twreid): Verify the results.
52        version = self.faft_client.tpm.get_kernel_version()
53        logging.info('Kernel version: %d', version)
54        version = self.faft_client.tpm.get_kernel_datakey_version()
55        logging.info('Kernel datakey version: %d', version)
56
57        self.dut_run_cmd('crossystem kernkey_vfy dev_boot_usb')
58        # Boot CrOS from USB
59        self.faft_client.system.set_dev_boot_usb(1)
60        self.switcher.simple_reboot()
61        self.switcher.bypass_dev_boot_usb()
62        self.switcher.wait_for_client()
63
64        # Check that DUT is booted from USB.
65        self.check_state((self.checkers.dev_boot_usb_checker, (True, True),
66                          'Device not booted from USB image properly.'))
67
68        out = self.dut_run_cmd('crossystem tpm_kernver tpm_fwver')
69        (kernver, fwver) = out[0].split(' ')
70        logging.info('tpm_kernver=%s tpm_fwver=%s', kernver, fwver)
71        assert kernver.lower() != '0xffffffff'
72        assert fwver.lower() != '0xffffffff'
73