606 lines
22 KiB
Python
606 lines
22 KiB
Python
# Lint as: python2, python3
|
|
# 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.
|
|
|
|
"""A Python library to interact with TPM module for testing.
|
|
|
|
Background
|
|
- TPM stands for Trusted Platform Module, a piece of security device
|
|
- TPM specification is the work of Trusted Computing Group
|
|
- As of September 2011, the current TPM specification is version 1.2
|
|
|
|
Dependency
|
|
- This library depends on a C shared library called "libtspi.so", which
|
|
contains a set of APIs for interacting with TPM module
|
|
|
|
Notes:
|
|
- An exception is raised if it doesn't make logical sense to continue program
|
|
flow (e.g. I/O error prevents test case from executing)
|
|
- An exception is caught and then converted to an error code if the caller
|
|
expects to check for error code per API definition
|
|
"""
|
|
|
|
from __future__ import absolute_import
|
|
from __future__ import division
|
|
from __future__ import print_function
|
|
|
|
import datetime, logging
|
|
from six.moves import range
|
|
|
|
from autotest_lib.client.common_lib import smogcheck_ttci
|
|
# Use explicit import to make code more readable
|
|
from ctypes import c_uint, c_uint32, cdll, c_bool, Structure, POINTER, \
|
|
c_ubyte, c_byte, byref, c_uint16, cast, create_string_buffer, c_uint64, \
|
|
c_char_p, addressof, c_char, pointer
|
|
|
|
|
|
# TPM flags
|
|
# TODO(tgao): possible to import from trousers/src/include/tss/tss_defines.h?
|
|
TSS_KEY_AUTHORIZATION = c_uint32(0x00000001)
|
|
TSS_KEY_TSP_SRK = c_uint32(0x04000000)
|
|
TSS_POLICY_USAGE = c_uint32(0x00000001)
|
|
TSS_OBJECT_TYPE_RSAKEY = c_uint(0x02)
|
|
TSS_SECRET_MODE_SHA1 = c_uint32(0x00001000)
|
|
TSS_SECRET_MODE_PLAIN = c_uint32(0x00001800)
|
|
TSS_TPMCAP_PROP_MANUFACTURER = c_uint(0x12)
|
|
TSS_TPMCAP_PROPERTY = c_uint(0x13)
|
|
TSS_TPMCAP_VERSION = c_uint(0x14)
|
|
TSS_TPMCAP_VERSION_VAL = c_uint32(0x15)
|
|
TSS_TPMSTATUS_DISABLEOWNERCLEAR = c_uint32(0x00000001)
|
|
TSS_TPMSTATUS_DISABLEFORCECLEAR = c_uint32(0x00000002)
|
|
TSS_TPMSTATUS_PHYSICALSETDEACTIVATED = c_uint32(0x00000010)
|
|
TSS_TPMSTATUS_SETTEMPDEACTIVATED = c_uint32(0x00000011)
|
|
|
|
# TODO(tgao): possible to import from trousers/src/include/tss/tpm.h?
|
|
TPM_SHA1_160_HASH_LEN = c_uint(0x14)
|
|
|
|
# Path to TSPI shared library.
|
|
TSPI_C_LIB = "/usr/lib/libtspi.so.1"
|
|
|
|
# Valid operation of tpmSetActive(). Equivalent CLI commands:
|
|
# 'status' = tpm_setactive --well-known --status
|
|
# 'activate' = tpm_setactive --well-known --active
|
|
# 'deactivate' = tpm_setactive --well-known --inactive
|
|
# 'temp' = tpm_setactive --well-known --temp
|
|
TPM_SETACTIVE_OP = ['status', 'activate', 'deactivate', 'temp']
|
|
|
|
# Valid operation of tpmSetClearable(). Equivalent CLI commands:
|
|
# 'status' = tpm_setclearable --well-known --status
|
|
# 'owner' = tpm_setclearable --well-known --owner
|
|
# 'force' = tpm_setclearable --well-known --force
|
|
TPM_SETCLEARABLE_OP = ['status', 'owner', 'force']
|
|
|
|
# Secret mode for setPolicySecret()
|
|
TSS_SECRET_MODE = dict(sha1=TSS_SECRET_MODE_SHA1,
|
|
plain=TSS_SECRET_MODE_PLAIN)
|
|
|
|
|
|
class SmogcheckError(Exception):
|
|
"""Base class for all smogcheck API errors."""
|
|
|
|
|
|
class TpmVersion(Structure):
|
|
"""Defines TPM version string struct.
|
|
|
|
Declared in tss/tpm.h and named TPM_VERSION.
|
|
"""
|
|
_fields_ = [('major', c_ubyte),
|
|
('minor', c_ubyte),
|
|
('revMajor', c_ubyte),
|
|
('revMinor', c_ubyte)]
|
|
|
|
|
|
class TpmCapVersionInfo(Structure):
|
|
"""Defines TPM version info struct.
|
|
|
|
Declared in tss/tpm.h and named TPM_CAP_VERSION_INFO.
|
|
"""
|
|
_fields_ = [('tag', c_uint16),
|
|
('version', TpmVersion),
|
|
('specLevel', c_uint16),
|
|
('errataRev', c_ubyte),
|
|
('tpmVendorID', c_char*4),
|
|
('vendorSpecific', POINTER(c_ubyte))]
|
|
|
|
|
|
def InitVersionInfo(vi):
|
|
"""Utility method to allocate memory for TPM version info.
|
|
|
|
Args:
|
|
vi: a TpmCapVerisonInfo object, just created.
|
|
"""
|
|
vi.tpmVendorId = create_string_buffer(4) # Allocate 4 bytes
|
|
vendorDetail = create_string_buffer(64) # Allocate 64 bytes
|
|
vi.vendorSpecific = cast(pointer(vendorDetail), POINTER(c_ubyte))
|
|
|
|
|
|
def PrintVersionInfo(vi):
|
|
"""Utility method to print TPM version info.
|
|
|
|
Args:
|
|
vi: a TpmCapVerisonInfo object.
|
|
"""
|
|
logging.info(' TPM 1.2 Version Info:\n')
|
|
logging.info(' Chip Version: %d.%d.%d.%d.', vi.version.major,
|
|
vi.version.minor, vi.version.revMajor, vi.version.revMinor)
|
|
logging.info(' Spec Level: %d', vi.specLevel)
|
|
logging.info(' Errata Revision: %d', vi.errataRev)
|
|
vendorId = [i for i in vi.tpmVendorID if i]
|
|
logging.info(' TPM Vendor ID: %s', ''.join(vendorId))
|
|
# TODO(tgao): handle the case when there's no vendor specific data.
|
|
logging.info(' Vendor Specific data (first 4 bytes in Hex): '
|
|
'%.2x %.2x %.2x %.2x', vi.vendorSpecific[0],
|
|
vi.vendorSpecific[1], vi.vendorSpecific[2],
|
|
vi.vendorSpecific[3])
|
|
|
|
|
|
def PrintSelfTestResult(str_len, pResult):
|
|
"""Utility method to print TPM self test result.
|
|
|
|
Args:
|
|
str_len: an integer, length of string pointed to by pResult.
|
|
pResult: a c_char_p, pointer to result.
|
|
"""
|
|
out = []
|
|
for i in range(str_len):
|
|
if i and not i % 32:
|
|
out.append('\t')
|
|
if not i % 4:
|
|
out.append(' ')
|
|
b = pResult.value[i]
|
|
out.append('%02x' % ord(b))
|
|
logging.info(' TPM Test Results: %s', ''.join(out))
|
|
|
|
|
|
class TpmController(object):
|
|
"""Object to interact with TPM module for testing."""
|
|
|
|
def __init__(self):
|
|
"""Constructor.
|
|
|
|
Mandatory params:
|
|
hContext: a c_uint32, context object handle.
|
|
_contextSet: a boolean, True if TPM context is set.
|
|
hTpm: a c_uint32, TPM object handle.
|
|
hTpmPolicy: a c_uint32, TPM policy object handle.
|
|
tspi_lib: a shared library object (libtspi.so).
|
|
|
|
Raises:
|
|
SmogcheckError: if error initializing TpmController.
|
|
"""
|
|
self.hContext = c_uint32(0)
|
|
self._contextSet = False
|
|
self.hTpm = c_uint32(0)
|
|
self.hTpmPolicy = c_uint32(0)
|
|
|
|
logging.info('Attempt to load shared library %s', TSPI_C_LIB)
|
|
try:
|
|
self.tspi_lib = cdll.LoadLibrary(TSPI_C_LIB)
|
|
except OSError as e:
|
|
raise SmogcheckError('Error loading C library %s: %r' %
|
|
(TSPI_C_LIB, e))
|
|
logging.info('Successfully loaded shared library %s', TSPI_C_LIB)
|
|
|
|
def closeContext(self):
|
|
"""Closes TPM context and cleans up.
|
|
|
|
Returns:
|
|
an integer, 0 for success and -1 for error.
|
|
"""
|
|
if not self._contextSet:
|
|
logging.debug('TPM context NOT set.')
|
|
return 0
|
|
|
|
ret = -1
|
|
# Calling the pointer type without an argument creates a NULL pointer
|
|
if self.tspi_lib.Tspi_Context_FreeMemory(self.hContext,
|
|
POINTER(c_byte)()) != 0:
|
|
logging.error('Error freeing memory when closing TPM context')
|
|
else:
|
|
logging.debug('Tspi_Context_FreeMemory() success')
|
|
|
|
if self.tspi_lib.Tspi_Context_Close(self.hContext) != 0:
|
|
logging.error('Error closing TPM context')
|
|
else:
|
|
logging.debug('Tspi_Context_Close() success')
|
|
ret = 0
|
|
self._contextSet = False
|
|
|
|
return ret
|
|
|
|
def _closeContextObject(self, hObject):
|
|
"""Closes TPM context object.
|
|
|
|
Args:
|
|
hObject: an integer, basic object handle.
|
|
|
|
Raises:
|
|
SmogcheckError: if an error is encountered.
|
|
"""
|
|
if self.tspi_lib.Tspi_Context_CloseObject(self.hContext, hObject) != 0:
|
|
raise SmogcheckError('Error closing TPM context object')
|
|
|
|
logging.debug('Tspi_Context_CloseObject() success')
|
|
|
|
def setupContext(self):
|
|
"""Sets up tspi context for TPM access.
|
|
|
|
TPM context cannot be reused. Therefore, each new Tspi_* command would
|
|
require a new context to be set up before execution and closing that
|
|
context after execution (or error).
|
|
|
|
Raises:
|
|
SmogcheckError: if an error is encountered.
|
|
"""
|
|
if self._contextSet:
|
|
logging.debug('TPM context already set.')
|
|
return
|
|
|
|
if self.tspi_lib.Tspi_Context_Create(byref(self.hContext)) != 0:
|
|
raise SmogcheckError('Error creating tspi context')
|
|
|
|
logging.info('Created tspi context = 0x%x', self.hContext.value)
|
|
|
|
if self.tspi_lib.Tspi_Context_Connect(self.hContext,
|
|
POINTER(c_uint16)()) != 0:
|
|
raise SmogcheckError('Error connecting to tspi context')
|
|
|
|
logging.info('Connected to tspi context')
|
|
|
|
if self.tspi_lib.Tspi_Context_GetTpmObject(self.hContext,
|
|
byref(self.hTpm)) != 0:
|
|
raise SmogcheckError('Error getting TPM object from tspi context')
|
|
|
|
logging.info('Got tpm object from tspi context = 0x%x', self.hTpm.value)
|
|
self._contextSet = True
|
|
|
|
def _getTpmStatus(self, flag, bValue):
|
|
"""Wrapper function to call Tspi_TPM_GetStatus().
|
|
|
|
Args:
|
|
flag: a c_uint, TPM status info flag, values defined in C header file
|
|
"tss/tss_defines.h".
|
|
bValue: a c_bool, place holder for specific TPM flag bit value (0/1).
|
|
|
|
Raises:
|
|
SmogcheckError: if an error is encountered.
|
|
"""
|
|
result = self.tspi_lib.Tspi_TPM_GetStatus(self.hTpm, flag,
|
|
byref(bValue))
|
|
if result != 0:
|
|
msg = ('Error (0x%x) getting status for flag 0x%x' %
|
|
(result, flag.value))
|
|
raise SmogcheckError(msg)
|
|
|
|
logging.info('Tspi_TPM_GetStatus(): success for flag 0x%x',
|
|
flag.value)
|
|
|
|
def _setTpmStatus(self, flag, bValue):
|
|
"""Wrapper function to call Tspi_TPM_GetStatus().
|
|
|
|
Args:
|
|
flag: a c_uint, TPM status info flag.
|
|
bValue: a c_bool, place holder for specific TPM flag bit value (0/1).
|
|
|
|
Raises:
|
|
SmogcheckError: if an error is encountered.
|
|
"""
|
|
result = self.tspi_lib.Tspi_TPM_SetStatus(self.hTpm, flag, bValue)
|
|
if result != 0:
|
|
msg = ('Error (0x%x) setting status for flag 0x%x' %
|
|
(result, flag.value))
|
|
raise SmogcheckError(msg)
|
|
|
|
logging.info('Tspi_TPM_SetStatus(): success for flag 0x%x',
|
|
flag.value)
|
|
|
|
def getPolicyObject(self, hTpm=None, hPolicy=None):
|
|
"""Get TPM policy object.
|
|
|
|
Args:
|
|
hTpm: a c_uint, TPM object handle.
|
|
hPolicy: a c_uint, TPM policy object handle.
|
|
|
|
Raises:
|
|
SmogcheckError: if an error is encountered.
|
|
"""
|
|
if hTpm is None:
|
|
hTpm = self.hTpm
|
|
|
|
if hPolicy is None:
|
|
hPolicy = self.hTpmPolicy
|
|
|
|
logging.debug('Tspi_GetPolicyObject(): hTpm = 0x%x, hPolicy = 0x%x',
|
|
hTpm.value, hPolicy.value)
|
|
result = self.tspi_lib.Tspi_GetPolicyObject(hTpm, TSS_POLICY_USAGE,
|
|
byref(hPolicy))
|
|
if result != 0:
|
|
msg = 'Error (0x%x) getting TPM policy object' % result
|
|
raise SmogcheckError(msg)
|
|
|
|
logging.debug('Tspi_GetPolicyObject() success hTpm = 0x%x, '
|
|
'hPolicy = 0x%x', hTpm.value, hPolicy.value)
|
|
|
|
def setPolicySecret(self, hPolicy=None, pSecret=None, secret_mode=None):
|
|
"""Sets TPM policy secret.
|
|
|
|
Args:
|
|
hPolicy: a c_uint, TPM policy object handle.
|
|
pSecret: a pointer to a byte array, which holds the TSS secret.
|
|
secret_mode: a string, valid values are keys of TSS_SECRET_MODE.
|
|
|
|
Raises:
|
|
SmogcheckError: if an error is encountered.
|
|
"""
|
|
if hPolicy is None:
|
|
hPolicy = self.hTpmPolicy
|
|
|
|
if pSecret is None:
|
|
raise SmogcheckError('setPolicySecret(): pSecret cannot be None')
|
|
|
|
if secret_mode is None or secret_mode not in TSS_SECRET_MODE:
|
|
raise SmogcheckError('setPolicySecret(): invalid secret_mode')
|
|
|
|
logging.debug('Tspi_Policy_SetSecret(): hPolicy = 0x%x, secret_mode '
|
|
'(%r) = %r', hPolicy.value, secret_mode,
|
|
TSS_SECRET_MODE[secret_mode])
|
|
|
|
result = self.tspi_lib.Tspi_Policy_SetSecret(
|
|
hPolicy, TSS_SECRET_MODE[secret_mode], TPM_SHA1_160_HASH_LEN,
|
|
pSecret)
|
|
if result != 0:
|
|
msg = 'Error (0x%x) setting TPM policy secret' % result
|
|
raise SmogcheckError(msg)
|
|
|
|
logging.debug('Tspi_Policy_SetSecret() success, hPolicy = 0x%x',
|
|
hPolicy.value)
|
|
|
|
def getTpmVersion(self):
|
|
"""Gets TPM version info.
|
|
|
|
Implementation based on tpm-tools-1.3.4/src/tpm_mgmt/tpm_version.c
|
|
Downloaded from:
|
|
http://sourceforge.net/projects/trousers/files/tpm-tools/1.3.4/\
|
|
tpm-tools-1.3.4.tar.gz
|
|
|
|
Raises:
|
|
SmogcheckError: if an error is encountered.
|
|
"""
|
|
uiResultLen = c_uint32(0)
|
|
pResult = c_char_p()
|
|
offset = c_uint64(0)
|
|
versionInfo = TpmCapVersionInfo()
|
|
InitVersionInfo(versionInfo)
|
|
|
|
logging.debug('Successfully set up tspi context: hTpm = %r', self.hTpm)
|
|
|
|
result = self.tspi_lib.Tspi_TPM_GetCapability(
|
|
self.hTpm, TSS_TPMCAP_VERSION_VAL, 0, POINTER(c_byte)(),
|
|
byref(uiResultLen), byref(pResult))
|
|
if result != 0:
|
|
msg = 'Error (0x%x) getting TPM capability, pResult = %r' % (
|
|
result, pResult.value)
|
|
raise SmogcheckError(msg)
|
|
|
|
logging.info('Successfully received TPM capability: '
|
|
'uiResultLen = %d, pResult=%r', uiResultLen.value,
|
|
pResult.value)
|
|
result = self.tspi_lib.Trspi_UnloadBlob_CAP_VERSION_INFO(
|
|
byref(offset), pResult, cast(byref(versionInfo),
|
|
POINTER(c_byte)))
|
|
if result != 0:
|
|
msg = 'Error (0x%x) unloading TPM CAP version info' % result
|
|
raise SmogcheckError(msg)
|
|
|
|
PrintVersionInfo(versionInfo)
|
|
|
|
def runTpmSelfTest(self):
|
|
"""Executes TPM self test.
|
|
|
|
Implementation based on tpm-tools-1.3.4/src/tpm_mgmt/tpm_selftest.c
|
|
|
|
Raises:
|
|
SmogcheckError: if an error is encountered.
|
|
"""
|
|
uiResultLen = c_uint32(0)
|
|
pResult = c_char_p()
|
|
self.setupContext()
|
|
|
|
logging.debug('Successfully set up tspi context: hTpm = 0x%x',
|
|
self.hTpm.value)
|
|
|
|
result = self.tspi_lib.Tspi_TPM_SelfTestFull(self.hTpm)
|
|
if result != 0:
|
|
self.closeContext()
|
|
raise SmogcheckError('Error (0x%x) with TPM self test' % result)
|
|
|
|
logging.info('Successfully executed TPM self test: hTpm = 0x%x',
|
|
self.hTpm.value)
|
|
result = self.tspi_lib.Tspi_TPM_GetTestResult(
|
|
self.hTpm, byref(uiResultLen), byref(pResult))
|
|
if result != 0:
|
|
self.closeContext()
|
|
raise SmogcheckError('Error (0x%x) getting test results' % result)
|
|
|
|
logging.info('TPM self test results: uiResultLen = %d, pResult=%r',
|
|
uiResultLen.value, pResult.value)
|
|
PrintSelfTestResult(uiResultLen.value, pResult)
|
|
self.closeContext()
|
|
|
|
def takeTpmOwnership(self):
|
|
"""Take TPM ownership.
|
|
|
|
Implementation based on tpm-tools-1.3.4/src/tpm_mgmt/tpm_takeownership.c
|
|
|
|
Raises:
|
|
SmogcheckError: if an error is encountered.
|
|
"""
|
|
hSrk = c_uint32(0) # TPM Storage Root Key
|
|
hSrkPolicy = c_uint32(0)
|
|
# Defaults each byte value to 0x00
|
|
well_known_secret = create_string_buffer(20)
|
|
pSecret = c_char_p(addressof(well_known_secret))
|
|
|
|
self.setupContext()
|
|
logging.debug('Successfully set up tspi context: hTpm = 0x%x',
|
|
self.hTpm.value)
|
|
|
|
try:
|
|
self.getPolicyObject()
|
|
self.setPolicySecret(pSecret=pSecret, secret_mode='sha1')
|
|
except SmogcheckError:
|
|
if hSrk != 0:
|
|
self._closeContextObject(hSrk)
|
|
self.closeContext()
|
|
raise # re-raise
|
|
|
|
flag = TSS_KEY_TSP_SRK.value | TSS_KEY_AUTHORIZATION.value
|
|
result = self.tspi_lib.Tspi_Context_CreateObject(
|
|
self.hContext, TSS_OBJECT_TYPE_RSAKEY, flag, byref(hSrk))
|
|
if result != 0:
|
|
raise SmogcheckError('Error (0x%x) creating context object' %
|
|
result)
|
|
logging.debug('hTpm = 0x%x, flag = 0x%x, hSrk = 0x%x',
|
|
self.hTpm.value, flag, hSrk.value) # DEBUG
|
|
|
|
try:
|
|
self.getPolicyObject(hTpm=hSrk, hPolicy=hSrkPolicy)
|
|
self.setPolicySecret(hPolicy=hSrkPolicy, pSecret=pSecret,
|
|
secret_mode='sha1')
|
|
except SmogcheckError:
|
|
if hSrk != 0:
|
|
self._closeContextObject(hSrk)
|
|
self.closeContext()
|
|
raise # re-raise
|
|
|
|
logging.debug('Successfully set up SRK policy: secret = %r, '
|
|
'hSrk = 0x%x, hSrkPolicy = 0x%x',
|
|
well_known_secret.value, hSrk.value, hSrkPolicy.value)
|
|
|
|
start_time = datetime.datetime.now()
|
|
result = self.tspi_lib.Tspi_TPM_TakeOwnership(self.hTpm, hSrk,
|
|
c_uint(0))
|
|
end_time = datetime.datetime.now()
|
|
if result != 0:
|
|
logging.info('Tspi_TPM_TakeOwnership error')
|
|
self._closeContextObject(hSrk)
|
|
self.closeContext()
|
|
raise SmogcheckError('Error (0x%x) taking TPM ownership' % result)
|
|
|
|
logging.info('Successfully took TPM ownership')
|
|
self._closeContextObject(hSrk)
|
|
self.closeContext()
|
|
return smogcheck_ttci.computeTimeElapsed(end_time, start_time)
|
|
|
|
def clearTpm(self):
|
|
"""Return TPM to default state.
|
|
|
|
Implementation based on tpm-tools-1.3.4/src/tpm_mgmt/tpm_clear.c
|
|
|
|
Raises:
|
|
SmogcheckError: if an error is encountered.
|
|
"""
|
|
logging.debug('Successfully set up tspi context: hTpm = %r', self.hTpm)
|
|
|
|
result = self.tspi_lib.Tspi_TPM_ClearOwner(self.hTpm, True)
|
|
if result != 0:
|
|
raise SmogcheckError('Error (0x%x) clearing TPM' % result)
|
|
|
|
logging.info('Successfully cleared TPM')
|
|
|
|
def setTpmActive(self, op):
|
|
"""Change TPM active state.
|
|
|
|
Implementation based on tpm-tools-1.3.4/src/tpm_mgmt/tpm_activate.c
|
|
|
|
Args:
|
|
op: a string, desired operation. Valid values are defined in
|
|
TPM_SETACTIVE_OP.
|
|
|
|
Raises:
|
|
SmogcheckError: if an error is encountered.
|
|
"""
|
|
bValue = c_bool()
|
|
# Defaults each byte value to 0x00
|
|
well_known_secret = create_string_buffer(20)
|
|
pSecret = c_char_p(addressof(well_known_secret))
|
|
|
|
if op not in TPM_SETACTIVE_OP:
|
|
msg = ('Invalid op (%s) for tpmSetActive(). Valid values are %r' %
|
|
(op, TPM_SETACTIVE_OP))
|
|
raise SmogcheckError(msg)
|
|
|
|
logging.debug('Successfully set up tspi context: hTpm = %r', self.hTpm)
|
|
|
|
if op == 'status':
|
|
self.getPolicyObject()
|
|
self.setPolicySecret(pSecret=pSecret, secret_mode='sha1')
|
|
|
|
self._getTpmStatus(
|
|
TSS_TPMSTATUS_PHYSICALSETDEACTIVATED, bValue)
|
|
logging.info('Persistent Deactivated Status: %s', bValue.value)
|
|
|
|
self._getTpmStatus(
|
|
TSS_TPMSTATUS_SETTEMPDEACTIVATED, bValue)
|
|
logging.info('Volatile Deactivated Status: %s', bValue.value)
|
|
elif op == 'activate':
|
|
self._setTpmStatus(
|
|
TSS_TPMSTATUS_PHYSICALSETDEACTIVATED, False)
|
|
logging.info('Successfully activated TPM')
|
|
elif op == 'deactivate':
|
|
self._setTpmStatus(
|
|
TSS_TPMSTATUS_PHYSICALSETDEACTIVATED, True)
|
|
logging.info('Successfully deactivated TPM')
|
|
elif op == 'temp':
|
|
self._setTpmStatus(
|
|
TSS_TPMSTATUS_SETTEMPDEACTIVATED, True)
|
|
logging.info('Successfully deactivated TPM for current boot')
|
|
|
|
def setTpmClearable(self, op):
|
|
"""Disable TPM clear operations.
|
|
|
|
Implementation based on tpm-tools-1.3.4/src/tpm_mgmt/tpm_clearable.c
|
|
|
|
Args:
|
|
op: a string, desired operation. Valid values are defined in
|
|
TPM_SETCLEARABLE_OP.
|
|
|
|
Raises:
|
|
SmogcheckError: if an error is encountered.
|
|
"""
|
|
bValue = c_bool()
|
|
# Defaults each byte value to 0x00
|
|
well_known_secret = create_string_buffer(20)
|
|
pSecret = c_char_p(addressof(well_known_secret))
|
|
|
|
if op not in TPM_SETCLEARABLE_OP:
|
|
msg = ('Invalid op (%s) for tpmSetClearable(). Valid values are %r'
|
|
% (op, TPM_SETCLEARABLE_OP))
|
|
raise SmogcheckError(msg)
|
|
|
|
logging.debug('Successfully set up tspi context: hTpm = %r', self.hTpm)
|
|
|
|
if op == 'status':
|
|
self.getPolicyObject()
|
|
self.setPolicySecret(pSecret=pSecret, secret_mode='sha1')
|
|
|
|
self._getTpmStatus(
|
|
TSS_TPMSTATUS_DISABLEOWNERCLEAR, bValue)
|
|
logging.info('Owner Clear Disabled: %s', bValue.value)
|
|
|
|
self._getTpmStatus(
|
|
TSS_TPMSTATUS_DISABLEFORCECLEAR, bValue)
|
|
logging.info('Force Clear Disabled: %s', bValue.value)
|
|
elif op == 'owner':
|
|
self.getPolicyObject()
|
|
self.setPolicySecret(pSecret=pSecret, secret_mode='sha1')
|
|
|
|
self._setTpmStatus(
|
|
TSS_TPMSTATUS_DISABLEOWNERCLEAR, False)
|
|
logging.info('Successfully disabled Owner Clear')
|
|
elif op == 'force':
|
|
self._setTpmStatus(
|
|
TSS_TPMSTATUS_DISABLEFORCECLEAR, True)
|
|
logging.info('Successfully disabled Force Clear')
|