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#
# Copyright (C) 2018 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
"""Unittests for validate_target_files.py."""
import os
import os.path
import shutil
import build_image
import common
import test_utils
from validate_target_files import ValidateVerifiedBootImages
class ValidateTargetFilesTest(test_utils.ReleaseToolsTestCase):
def setUp(self):
self.testdata_dir = test_utils.get_testdata_dir()
def _generate_boot_image(self, output_file):
kernel = common.MakeTempFile(prefix='kernel-')
with open(kernel, 'wb') as kernel_fp:
kernel_fp.write(os.urandom(10))
cmd = ['mkbootimg', '--kernel', kernel, '-o', output_file]
proc = common.Run(cmd)
stdoutdata, _ = proc.communicate()
self.assertEqual(
0, proc.returncode,
"Failed to run mkbootimg: {}".format(stdoutdata))
cmd = ['boot_signer', '/boot', output_file,
os.path.join(self.testdata_dir, 'testkey.pk8'),
os.path.join(self.testdata_dir, 'testkey.x509.pem'), output_file]
proc = common.Run(cmd)
stdoutdata, _ = proc.communicate()
self.assertEqual(
0, proc.returncode,
"Failed to sign boot image with boot_signer: {}".format(stdoutdata))
def test_ValidateVerifiedBootImages_bootImage(self):
input_tmp = common.MakeTempDir()
os.mkdir(os.path.join(input_tmp, 'IMAGES'))
boot_image = os.path.join(input_tmp, 'IMAGES', 'boot.img')
self._generate_boot_image(boot_image)
info_dict = {
'boot_signer' : 'true',
}
options = {
'verity_key' : os.path.join(self.testdata_dir, 'testkey.x509.pem'),
}
ValidateVerifiedBootImages(input_tmp, info_dict, options)
def test_ValidateVerifiedBootImages_bootImage_wrongKey(self):
input_tmp = common.MakeTempDir()
os.mkdir(os.path.join(input_tmp, 'IMAGES'))
boot_image = os.path.join(input_tmp, 'IMAGES', 'boot.img')
self._generate_boot_image(boot_image)
info_dict = {
'boot_signer' : 'true',
}
options = {
'verity_key' : os.path.join(self.testdata_dir, 'verity.x509.pem'),
}
self.assertRaises(
AssertionError, ValidateVerifiedBootImages, input_tmp, info_dict,
options)
def test_ValidateVerifiedBootImages_bootImage_corrupted(self):
input_tmp = common.MakeTempDir()
os.mkdir(os.path.join(input_tmp, 'IMAGES'))
boot_image = os.path.join(input_tmp, 'IMAGES', 'boot.img')
self._generate_boot_image(boot_image)
# Corrupt the late byte of the image.
with open(boot_image, 'r+b') as boot_fp:
boot_fp.seek(-1, os.SEEK_END)
last_byte = boot_fp.read(1)
last_byte = chr(255 - ord(last_byte))
boot_fp.seek(-1, os.SEEK_END)
boot_fp.write(last_byte)
info_dict = {
'boot_signer' : 'true',
}
options = {
'verity_key' : os.path.join(self.testdata_dir, 'testkey.x509.pem'),
}
self.assertRaises(
AssertionError, ValidateVerifiedBootImages, input_tmp, info_dict,
options)
def _generate_system_image(self, output_file):
verity_fec = True
partition_size = 1024 * 1024
image_size, verity_size = build_image.AdjustPartitionSizeForVerity(
partition_size, verity_fec)
# Use an empty root directory.
system_root = common.MakeTempDir()
cmd = ['mkuserimg_mke2fs', '-s', system_root, output_file, 'ext4',
'/system', str(image_size), '-j', '0']
proc = common.Run(cmd)
stdoutdata, _ = proc.communicate()
self.assertEqual(
0, proc.returncode,
"Failed to create system image with mkuserimg_mke2fs: {}".format(
stdoutdata))
# Append the verity metadata.
prop_dict = {
'partition_size' : str(partition_size),
'image_size' : str(image_size),
'verity_block_device' : '/dev/block/system',
'verity_key' : os.path.join(self.testdata_dir, 'testkey'),
'verity_signer_cmd' : 'verity_signer',
'verity_size' : str(verity_size),
}
build_image.MakeVerityEnabledImage(output_file, verity_fec, prop_dict)
def test_ValidateVerifiedBootImages_systemImage(self):
input_tmp = common.MakeTempDir()
os.mkdir(os.path.join(input_tmp, 'IMAGES'))
system_image = os.path.join(input_tmp, 'IMAGES', 'system.img')
self._generate_system_image(system_image)
# Pack the verity key.
verity_key_mincrypt = os.path.join(
input_tmp, 'BOOT', 'RAMDISK', 'verity_key')
os.makedirs(os.path.dirname(verity_key_mincrypt))
shutil.copyfile(
os.path.join(self.testdata_dir, 'testkey_mincrypt'),
verity_key_mincrypt)
info_dict = {
'verity' : 'true',
}
options = {
'verity_key' : os.path.join(self.testdata_dir, 'testkey.x509.pem'),
'verity_key_mincrypt' : verity_key_mincrypt,
}
ValidateVerifiedBootImages(input_tmp, info_dict, options)
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