def main(argv):
# Get sparse image
input_image = sparse_img.SparseImage(INPUT_IMAGE,
tempfile.mkstemp()[1], '0')
# Generate output files
b = blockimgdiff.BlockImageDiff(input_image, None)
b.Compute('system')
print('Done! Output files: %s' % os.path.dirname(__file__))
return
def GetCareMap(which, imgname):
"""Generate care_map of system (or vendor) partition"""
assert which in ("system", "vendor")
_, blk_device = common.GetTypeAndDevice("/" + which, OPTIONS.info_dict)
simg = sparse_img.SparseImage(imgname)
care_map_list = []
care_map_list.append(blk_device)
care_map_list.append(simg.care_map.to_string_raw())
return care_map_list
def _GetImage(which, tmpdir):
assert which in ('system', 'vendor')
path = os.path.join(tmpdir, 'IMAGES', which + '.img')
mappath = os.path.join(tmpdir, 'IMAGES', which + '.map')
# Map file must exist (allowed to be empty).
assert os.path.exists(path) and os.path.exists(mappath)
clobbered_blocks = '0'
return sparse_img.SparseImage(path, mappath, clobbered_blocks)
def test_Generate(self):
image_file = sparse_img.SparseImage(self._generate_image())
generator = CreateHashtreeInfoGenerator('system', 4096, self.prop_dict)
info = generator.Generate(image_file)
self.assertEqual(RangeSet(data=[0, 991232 / 4096]), info.filesystem_range)
self.assertEqual(RangeSet(data=[991232 / 4096, (991232 + 12288) / 4096]),
info.hashtree_range)
self.assertEqual(self.hash_algorithm, info.hash_algorithm)
self.assertEqual(self.fixed_salt, info.salt)
self.assertEqual(self.expected_root_hash, info.root_hash)
def test_ParseHashtreeMetadata(self):
image_file = sparse_img.SparseImage(self._generate_image())
generator = VerifiedBootVersion1HashtreeInfoGenerator(
self.partition_size, 4096, True)
generator.DecomposeSparseImage(image_file)
# pylint: disable=protected-access
generator._ParseHashtreeMetadata()
self.assertEqual(
self.hash_algorithm, generator.hashtree_info.hash_algorithm)
self.assertEqual(self.fixed_salt, generator.hashtree_info.salt)
self.assertEqual(self.expected_root_hash, generator.hashtree_info.root_hash)
def test_ValidateHashtree_failure(self):
generator = VerifiedBootVersion1HashtreeInfoGenerator(
self.partition_size, 4096, True)
generator.image = sparse_img.SparseImage(self._GenerateImage())
generator.hashtree_info = info = HashtreeInfo()
info.filesystem_range = RangeSet(data=[0, 991232 // 4096])
info.hashtree_range = RangeSet(
data=[991232 // 4096, (991232 + 12288) // 4096])
info.hash_algorithm = self.hash_algorithm
info.salt = self.fixed_salt
info.root_hash = "a" + self.expected_root_hash[1:]
self.assertFalse(generator.ValidateHashtree())
def GetCareMap(which, imgname):
"""Generates the care_map for the given partition."""
assert which in PARTITIONS_WITH_CARE_MAP
simg = sparse_img.SparseImage(imgname)
care_map_ranges = simg.care_map
key = which + "_adjusted_partition_size"
adjusted_blocks = OPTIONS.info_dict.get(key)
if adjusted_blocks:
assert adjusted_blocks > 0, "blocks should be positive for " + which
care_map_ranges = care_map_ranges.intersect(rangelib.RangeSet(
"0-%d" % (adjusted_blocks,)))
return [which, care_map_ranges.to_string_raw()]
def main(argv):
global input
if len(sys.argv) < 3:
outdir = './system'
else:
outdir = sys.argv[2] + '/system'
if len(sys.argv) < 4:
version = 4
item = True
while item:
print(''' 1. Android Lollipop 5.0
2. Android Lollipop 5.1
3. Android Marshmallow 6.0
4. Android Nougat 7.0/7.1/8.0
''')
try:
input = raw_input
except NameError:
pass
item = input('Choose system version: ')
if item == '1':
version = 1
break
elif item == '2':
version = 2
break
elif item == '3':
version = 3
break
elif item == '4':
version = 4
break
else:
return
else:
version = int(sys.argv[3])
# Get sparse image
image = sparse_img.SparseImage(INPUT_IMAGE, tempfile.mkstemp()[1], '0')
# Generate output files
b = blockimgdiff.BlockImageDiff(image, None, version)
b.Compute(outdir)
print('Done! Output files: %s' % os.path.dirname(outdir))
return
def GetCareMap(which, imgname):
"""Generate care_map of system (or vendor) partition"""
assert which in ("system", "vendor")
simg = sparse_img.SparseImage(imgname)
care_map_list = [which]
care_map_ranges = simg.care_map
key = which + "_adjusted_partition_size"
adjusted_blocks = OPTIONS.info_dict.get(key)
if adjusted_blocks:
assert adjusted_blocks > 0, "blocks should be positive for " + which
care_map_ranges = care_map_ranges.intersect(
rangelib.RangeSet("0-%d" % (adjusted_blocks, )))
care_map_list.append(care_map_ranges.to_string_raw())
return care_map_list
def GetImage(which, tmpdir, info_dict):
# Return an image object (suitable for passing to BlockImageDiff)
# for the 'which' partition (most be "system" or "vendor"). If a
# prebuilt image and file map are found in tmpdir they are used,
# otherwise they are reconstructed from the individual files.
path = os.path.join(tmpdir, "IMAGES", which + ".img")
mappath = os.path.join(tmpdir, "IMAGES", which + ".map")
if os.path.exists(path) and os.path.exists(mappath):
print "using %s.img from target-files" % (which, )
# This is a 'new' target-files, which already has the image in it.
else:
print "building %s.img from target-files" % (which, )
# This is an 'old' target-files, which does not contain images
# already built. Build them.
mappath = tempfile.mkstemp()[1]
common.OPTIONS.tempfiles.append(mappath)
path = BuildExt4(which, tmpdir, info_dict, block_list=mappath)
return sparse_img.SparseImage(path, mappath)
def GetSystemImage(info, tmpdir):
path = os.path.join(tmpdir, "IMAGES", "system.img")
mappath = os.path.join(tmpdir, "IMAGES", "system.map")
if os.path.exists(path) and os.path.exists(mappath):
print "using system.img from target-files"
# This is a 'new' target-files, which already has the image in it.
else:
print "building system.img from target-files"
# This is an 'old' target-files, which does not contain images
# already built. Build them.
mappath = tempfile.mkstemp()[1]
OPTIONS.tempfiles.append(mappath)
import add_img_to_target_files
path = add_img_to_target_files.BuildSystem(tmpdir,
info,
block_list=mappath)
return sparse_img.SparseImage(path, mappath)
def GetCareMap(which, imgname):
"""Returns the care_map string for the given partition.
Args:
which: The partition name, must be listed in PARTITIONS_WITH_CARE_MAP.
imgname: The filename of the image.
Returns:
(which, care_map_ranges): care_map_ranges is the raw string of the care_map
RangeSet.
"""
assert which in PARTITIONS_WITH_CARE_MAP
simg = sparse_img.SparseImage(imgname)
care_map_ranges = simg.care_map
key = which + "_image_blocks"
image_blocks = OPTIONS.info_dict.get(key)
if image_blocks:
assert image_blocks > 0, "blocks for {} must be positive".format(which)
care_map_ranges = care_map_ranges.intersect(
rangelib.RangeSet("0-{}".format(image_blocks)))
return [which, care_map_ranges.to_string_raw()]
def GetCareMap(which, imgname):
"""Returns the care_map string for the given partition.
Args:
which: The partition name, must be listed in PARTITIONS_WITH_CARE_MAP.
imgname: The filename of the image.
Returns:
(which, care_map_ranges): care_map_ranges is the raw string of the care_map
RangeSet.
"""
assert which in PARTITIONS_WITH_CARE_MAP
simg = sparse_img.SparseImage(imgname)
care_map_ranges = simg.care_map
key = which + "_adjusted_partition_size"
adjusted_blocks = OPTIONS.info_dict.get(key)
if adjusted_blocks:
assert adjusted_blocks > 0, "blocks should be positive for " + which
care_map_ranges = care_map_ranges.intersect(
rangelib.RangeSet("0-%d" % (adjusted_blocks, )))
return [which, care_map_ranges.to_string_raw()]
def main(argv):
if len(sys.argv) < 3:
version = 4
item = True
while item:
print(''' 1. Android Lollipop 5.0
2. Android Lollipop 5.1
3. Android Marshmallow 6.0
4. Android Nougat 7.0
''')
item = raw_input('Choose system version: ')
if item == '1':
version = 1
break
elif item == '2':
version = 2
break
elif item == '3':
version = 3
break
elif item == '4':
version = 4
break
else:
return
else:
version = int(sys.argv[2])
# Get sparse image
image = sparse_img.SparseImage(INPUT_IMAGE, tempfile.mkstemp()[1], '0')
# Generate output files
b = blockimgdiff.BlockImageDiff(image, None, version)
b.Compute('system')
print('Done! Output files: %s' % os.path.dirname(__file__))
return
def GetCareMap(which, imgname):
"""Returns the care_map string for the given partition.
Args:
which: The partition name, must be listed in PARTITIONS_WITH_CARE_MAP.
imgname: The filename of the image.
Returns:
(which, care_map_ranges): care_map_ranges is the raw string of the care_map
RangeSet; or None.
"""
assert which in common.PARTITIONS_WITH_CARE_MAP
# which + "_image_size" contains the size that the actual filesystem image
# resides in, which is all that needs to be verified. The additional blocks in
# the image file contain verity metadata, by reading which would trigger
# invalid reads.
image_size = OPTIONS.info_dict.get(which + "_image_size")
if not image_size:
return None
image_blocks = int(image_size) // 4096 - 1
assert image_blocks > 0, "blocks for {} must be positive".format(which)
# For sparse images, we will only check the blocks that are listed in the care
# map, i.e. the ones with meaningful data.
if "extfs_sparse_flag" in OPTIONS.info_dict:
simg = sparse_img.SparseImage(imgname)
care_map_ranges = simg.care_map.intersect(
rangelib.RangeSet("0-{}".format(image_blocks)))
# Otherwise for non-sparse images, we read all the blocks in the filesystem
# image.
else:
care_map_ranges = rangelib.RangeSet("0-{}".format(image_blocks))
return [which, care_map_ranges.to_string_raw()]
def ZeroPadSimg(image_file, pad_size):
blocks = pad_size // BLOCK_SIZE
logger.info("Padding %d blocks (%d bytes)", blocks, pad_size)
simg = sparse_img.SparseImage(image_file, mode="r+b", build_map=False)
simg.AppendFillChunk(0, blocks)
def GetSimgSize(image_file):
simg = sparse_img.SparseImage(image_file, build_map=False)
return simg.blocksize * simg.total_blocks
def GetPartitionSizeFromImage(img):
try:
simg = sparse_img.SparseImage(img)
return simg.blocksize * simg.total_blocks
except ValueError:
return os.path.getsize(img)
def main(sysimg, outdir):
tgt = sparse_img.SparseImage(sysimg)
bif = blockimgdiff.BlockImageDiff(tgt, None)
bif.Compute(outdir)
return
