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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
17    def initialize(self, host, cmdline_args):
18        super(firmware_TPMKernelVersion, self).initialize(host, cmdline_args)
19        self.switcher.setup_mode('dev')
20        self.setup_usbkey(usbkey=True, host=False)
21        self.original_dev_boot_usb = self.faft_client.system.get_dev_boot_usb()
22        logging.info('Original dev_boot_usb value: %s',
23                     str(self.original_dev_boot_usb))
24
25
26    def dut_run_cmd(self, command):
27        """Execute command on DUT.
28
29        @param command: shell command to be executed on DUT.
30        @returns command output.
31        """
32        logging.info('Execute %s', command)
33        output = self.faft_client.system.run_shell_command_get_output(command)
34        logging.info('Output %s', output)
35        return output
36
37    def cleanup(self):
38        """Reboot device from SSD."""
39        if self.faft_client.system.is_removable_device_boot():
40          logging.info('Reboot into internal disk...')
41          self.faft_client.system.set_dev_boot_usb(self.original_dev_boot_usb)
42          self.switcher.mode_aware_reboot()
43        super(firmware_TPMKernelVersion, self).cleanup()
44
45    def run_once(self):
46        # Get the kernel version and its datakey version.
47        # TODO(twreid): Verify the results.
48        version = self.faft_client.tpm.get_kernel_version()
49        logging.info('Kernel version: %d', version)
50        version = self.faft_client.tpm.get_kernel_datakey_version()
51        logging.info('Kernel datakey version: %d', version)
52
53        self.dut_run_cmd('crossystem kernkey_vfy dev_boot_usb')
54        # Boot CrOS from USB
55        self.faft_client.system.set_dev_boot_usb(1)
56        self.switcher.simple_reboot()
57        self.switcher.bypass_dev_boot_usb()
58        self.switcher.wait_for_client()
59
60        # Check that DUT is booted from USB.
61        self.check_state((self.checkers.crossystem_checker,
62                          {'kernkey_vfy': 'hash'}))
63
64        out = self.dut_run_cmd('crossystem tpm_kernver tpm_fwver')
65        (kernver, fwver) = out[0].split(' ')
66        logging.info('tpm_kernver=%s tpm_fwver=%s', kernver, fwver)
67        assert kernver != '0xFFFFFFFF'
68        assert fwver != '0xFFFFFFFF'
69