blob: 769cde789602ecbd5cf880c255b4b455dc381fd9 [file] [log] [blame]
# Copyright 2017 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.
import logging
import time
from autotest_lib.client.common_lib import error
from autotest_lib.client.common_lib.cros import tpm_utils
from autotest_lib.server import test, autotest
from autotest_lib.server.cros.faft.firmware_test import FirmwareTest
class firmware_FWMPDisableCCD(FirmwareTest):
"""A test that uses cryptohome to set the FWMP flags and verifies that
cr50 disables/enables console unlock."""
version = 1
def initialize(self, host, cmdline_args):
"""Initialize servo check if cr50 exists"""
super(firmware_FWMPDisableCCD, self).initialize(host, cmdline_args) = host
self.test_cr50_unlock = hasattr(self, "cr50")
if self.test_cr50_unlock:
rv = self.cr50.send_command_get_output('lock dummy', ['.+>'])
if 'Access Denied' in rv[0]:
self.test_cr50_unlock = False
logging.warning('Cr50 image is permanently locked.')
def cr50_try_unlock(self, fwmp_disabled_unlock):
"""Run lock disable
The FWMP flags may disable ccd. If they do then we expect lock disable
to fail.
@param fwmp_disabled_unlock: True if the unlock process should fail
if fwmp_disabled_unlock:
if 'DBG' in self.servo.get('cr50_version'):
response = self.cr50.FWMP_LOCKED_DBG
response = self.cr50.FWMP_LOCKED_PROD
self.cr50.send_command_get_output('lock disable', response)
def cr50_check_fwmp_flag(self, fwmp_disabled_unlock):
"""Verify cr50 thinks the flag is set or cleared"""
response = 'Console unlock%s allowed' % (' not' if fwmp_disabled_unlock
else '')
self.cr50.send_command_get_output('sysrst pulse', [response])
def cr50_check_lock_control(self, flags):
"""Verify cr50 lock enable/disable works as intended based on flags.
If flags & self.FWMP_DEV_DISABLE_CCD_UNLOCK is true, lock disable should
This will only run during a test with access to the cr50 console
@param flags: A string with the FWMP settings.
if not self.test_cr50_unlock:
fwmp_disabled_unlock = (self.FWMP_DEV_DISABLE_CCD_UNLOCK &
int(flags, 16))'Flags are set to %s ccd unlock is %s', flags,
'disabled' if fwmp_disabled_unlock else 'enabled')
# Verify that the ccd disable flag is still set
# Enable the lock
# Try to disable it
# Verify that the ccd disable flag is still set
def check_fwmp(self, flags, clear_tpm_owner):
"""Set the flags and verify ccd lock/unlock
flags: A string to used set the FWMP flags
clear_tpm_owner: True if the TPM owner needs to be cleared before
setting the flags and verifying ccd lock/unlock
if clear_tpm_owner:'Clearing TPM owner')
tpm_utils.ClearTPMOwnerRequest('setting flags to %s', flags)
autotest.Autotest('firmware_SetFWMP', flags=flags,
fwmp_cleared=clear_tpm_owner, check_client_result=True)
# Verify ccd lock/unlock with the current flags works as intended.
def run_once(self):
self.check_fwmp('0xaa00', True)
# Verify that the flags can be changed on the same boot
self.check_fwmp('0xbb00', False)
# Verify setting FWMP_DEV_DISABLE_CCD_UNLOCK disables ccd
self.check_fwmp(hex(self.FWMP_DEV_DISABLE_CCD_UNLOCK), True)
# 0x41 is the flag setting when dev boot is disabled. Make sure that
# nothing unexpected happens.
self.check_fwmp('0x41', True)
# Clear the TPM owner and verify lock can still be enabled/disabled when
# the FWMP has not been created