def unpack(self):
unpacked_files = []
if self.payload_format not in ['cpio', 'drpm']:
return unpacked_files
if self.compressor == 'bzip2':
decompressor = bz2.BZ2Decompressor()
payload = decompressor.decompress(self.data.payload)
elif self.compressor == 'xz' or self.compressor == 'lzma':
payload = lzma.decompress(self.data.payload)
elif self.compressor == 'zstd':
reader = zstandard.ZstdDecompressor().stream_reader(
self.data.payload)
payload = reader.read()
else:
payload = gzip.decompress(self.data.payload)
if self.payload_format == 'drpm':
out_labels = []
file_path = pathlib.Path('drpm')
outfile_rel = self.rel_unpack_dir / file_path
outfile_full = self.scan_environment.unpack_path(outfile_rel)
os.makedirs(outfile_full.parent, exist_ok=True)
outfile = open(outfile_full, 'wb')
outfile.write(payload)
outfile.close()
fr = FileResult(self.fileresult, self.rel_unpack_dir / file_path,
set(out_labels))
unpacked_files.append(fr)
else:
# write the payload to a temporary file first
temporary_file = tempfile.mkstemp(
dir=self.scan_environment.temporarydirectory)
os.write(temporary_file[0], payload)
os.fdopen(temporary_file[0]).close()
payloadfile = temporary_file[1]
payloadfile_full = self.scan_environment.unpack_path(payloadfile)
# create a file result object and pass it to the CPIO unpacker
fr = FileResult(self.fileresult, payloadfile, set([]))
fr.set_filesize(len(payload))
# assuming that the CPIO data is always in "new ascii" format
cpio_parser = cpio_unpack.CpioNewAsciiUnpackParser(
fr, self.scan_environment, self.rel_unpack_dir, 0)
try:
cpio_parser.open()
unpackresult = cpio_parser.parse_and_unpack()
except UnpackParserException as e:
raise UnpackParserException(e.args)
finally:
cpio_parser.close()
# walk the results and add them.
for i in unpackresult.unpacked_files:
i.parent_path = self.fileresult.filename
unpacked_files.append(i)
return (unpacked_files)
def download_bz2(link, dest):
print 'Downloading', link
compressed = urllib2.urlopen(link)
with open(dest, 'wb') as f:
decompressor = bz2.BZ2Decompressor()
for data in iter(lambda: compressed.read(100 * 1024), b''):
f.write(decompressor.decompress(data))
def decompress(self, dat):
if dat.startswith('BZ'):
try:
return bz2.BZ2Decompressor().decompress(dat)
except IOError:
pass
return dat
def __init__(self, coders: List[Dict[str, Any]], size: int, crc: Optional[int]) -> None:
self.input_size = size
self.consumed = 0 # type: int
self.crc = crc
self.digest = None # type: Optional[int]
filters = [] # type: List[Dict[str, Any]]
try:
for coder in coders:
if coder['numinstreams'] != 1 or coder['numoutstreams'] != 1:
raise UnsupportedCompressionMethodError('Only a simple compression method is currently supported.')
filter = self.lzma_methods_map.get(coder['method'], None)
if filter is not None:
properties = coder.get('properties', None)
if properties is not None:
filters[:0] = [lzma._decode_filter_properties(filter, properties)] # type: ignore
else:
filters[:0] = [{'id': filter}]
else:
raise UnsupportedCompressionMethodError
except UnsupportedCompressionMethodError as e:
filter = self.alt_methods_map.get(coders[0]['method'], None)
if len(coders) == 1 and filter is not None:
if filter == self.FILTER_BZIP2:
self.decompressor = bz2.BZ2Decompressor() # type: Union[bz2.BZ2Decompressor, lzma.LZMADecompressor]
else:
raise e
self.can_partial_decompress = False
else:
raise e
else:
self.decompressor = lzma.LZMADecompressor(format=lzma.FORMAT_RAW, filters=filters)
self.can_partial_decompress = True
self.filters = filters
def _get_decoder(compression):
if compression == 'zlib':
try:
import zlib
except ImportError:
raise ImportError(
"Your Python does not have the zlib library, "
"therefore the compressed block in this ASDF file "
"can not be decompressed.")
return zlib.decompressobj()
elif compression == 'bzp2':
try:
import bz2
except ImportError:
raise ImportError(
"Your Python does not have the bz2 library, "
"therefore the compressed block in this ASDF file "
"can not be decompressed.")
return bz2.BZ2Decompressor()
elif compression == 'lz4':
try:
import lz4.block
except ImportError:
raise ImportError(
"lz4 library in not installed in your Python environment, "
"therefore the compressed block in this ASDF file "
"can not be decompressed.")
return Lz4Decompressor(lz4.block)
else:
raise ValueError("Unknown compression type: '{0}'".format(compression))
def extract(file):
with open('sde.sqlite', 'wb') as newfile, open(file, 'rb') as file:
decompressor = bz2.BZ2Decompressor()
for data in iter(lambda: file.read(100 * 1024), b''):
# noinspection PyArgumentList
newfile.write(decompressor.decompress(data))
return True
def _decompressor_stream(self):
dwnld_file = None
compression = self.parameters.get('compression', False)
fname, _ = self._url_to_fname_suffix(self.path, compression)
decompressor = None
if compression:
if compression == 'gz':
decompressor = zlib.decompressobj(16 + zlib.MAX_WBITS)
elif compression == 'bz2':
decompressor = bz2.BZ2Decompressor()
elif compression == 'xz':
decompressor = lzma.LZMADecompressor() # pylint: disable=no-member
self.logger.debug("Using %s decompression" % compression)
else:
self.logger.debug("No compression specified.")
def write(buff):
if decompressor:
buff = decompressor.decompress(buff)
dwnld_file.write(buff)
try:
dwnld_file = open(fname, 'wb')
yield (write, fname)
finally:
if dwnld_file:
dwnld_file.close()
def _bunzip2_stream(fileobj, bufsize=1024):
"""Decompress gzipped data on the fly.
:param fileobj: object supporting ``read()``
:param bufsize: number of bytes to read from *fileobj* at a time.
This yields decompressed chunks; it does *not* split on lines. To get
lines, wrap this in :py:func:`buffer_iterator_to_line_iterator`.
This will replace :py:func:`bunzip2_stream` in v0.5.0 as part of
an effort to be less line-based (see #715).
"""
if bz2 is None:
raise Exception(
'bz2 module was not successfully imported (likely not installed).')
d = bz2.BZ2Decompressor()
while True:
chunk = fileobj.read(bufsize)
if not chunk:
return
parts = d.decompress(chunk)
for part in parts:
yield part
def _decompressor_stream(url, imgdir, decompress):
fd = None
decompressor = None
fname, suffix = _url_to_fname_suffix(url, imgdir)
if suffix == 'gz' and decompress:
decompressor = zlib.decompressobj(16 + zlib.MAX_WBITS)
elif suffix == 'bz2' and decompress:
decompressor = bz2.BZ2Decompressor()
elif suffix == 'xz' and decompress:
decompressor = lzma.LZMADecompressor()
else:
# don't remove the file's real suffix
fname = '%s.%s' % (fname, suffix)
def write(buff):
if decompressor:
buff = decompressor.decompress(buff)
fd.write(buff)
try:
fd = open(fname, 'wb')
yield (write, fname)
finally:
if fd:
fd.close()
def _decomp(self):
is_proc_running = True
input_list = [self.task_queue._reader.fileno()]
while is_proc_running:
inready, outread, errready = select.select(input_list, [], [])
if self.task_queue._reader.fileno() in inready:
input_task = self.task_queue.get()
if input_task == Const.QUEUE_SUCCESS_MESSAGE:
is_proc_running = False
break
(comp_type, comp_data) = input_task
start = time.time()
comp_string = "Unknown Compression Algorithm!"
if comp_type == Const.COMPRESSION_LZMA:
comp_string = "lzma"
decompressor = lzma.LZMADecompressor()
decomp_data = decompressor.decompress(comp_data)
decomp_data += decompressor.flush()
elif comp_type == Const.COMPRESSION_BZIP2:
comp_string = "bzip2"
decompressor = bz2.BZ2Decompressor()
decomp_data = decompressor.decompress(comp_data)
elif comp_type == Const.COMPRESSION_GZIP:
comp_string = "gzip"
decomp_data = zlib.decompress(comp_data,
zlib.MAX_WBITS | 16)
else:
raise CompressionError("Not valid compression option")
self.analysis_queue.put("B,D(%s),%5.3f" %
(comp_string, time.time() - start))
self.output_queue.put(decomp_data)
self.command_queue.put("Compressed processed everything")
def from_header(cls, header: bytes):
if header == b'LZ00' and support['lzma']:
return lzma.LZMADecompressor()
elif header == b'BZ00' and support['bz2']:
return bz2.BZ2Decompressor()
else:
return zlib.decompressobj()
def get(cls, algo: str):
if algo == 'lzma' and support['lzma']:
return lzma.LZMADecompressor()
elif algo == 'bz2' and support['bz2']:
return bz2.BZ2Decompressor()
else:
return zlib.decompressobj()
def extract(self, member, path=".", fileobj=None):
"""Extract and decompress `member` into `path` which defaults to the
current directory."""
self.fileobj.seek(member._offset)
decomp = bz2.BZ2Decompressor()
if fileobj:
data = self.fileobj.read(member.size)
fileobj.write(decomp.decompress(data))
return
dstpath = safe_join(path, member.name)
dirname = os.path.dirname(dstpath)
if not os.path.exists(dirname):
os.makedirs(dirname)
output = open(dstpath, "wb")
toread = member.size
while True:
thisblock = min(128 * 1024, toread)
block = self.fileobj.read(thisblock)
if not block:
break
toread -= len(block)
output.write(decomp.decompress(block))
output.close()
os.chmod(dstpath, member.flags)
return dstpath
class UrlZipReader:
def __init__(self, _url):
self._url = _url
try:
#self.fp = urllib2.urlopen(self._url)
req = urllib2.Request(self._url)
req.add_header(
"User-Agent",
"Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_8) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.37 Safari/537.36"
)
#req.add_header("User-agent", "Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.7.8) Gecko/20050609 Firefox/1.0.4")
req.add_header("Connection", "Keep-Alive")
print req.headers
self.fp = urllib2.urlopen(req)
except urllib2.HTTPError, e:
print e.code
print e.msg
return
print self.fp.info()
print self.fp.getcode()
if self._url.endswith(".gz"):
self.zip = zlib.decompressobj(31)
elif self._url.endswith(".bz2"):
self.zip = bz2.BZ2Decompressor()
#self.zip = bz2.BZ2File(self.fp)
elif self._url.endswith(".zip"):
self.zip = zlib.decompressobj(15)
else:
self.zip = None
def bunzip2_stream(fileobj, bufsize=1024):
"""Decompress gzipped data on the fly.
:param fileobj: object supporting ``read()``
:param bufsize: number of bytes to read from *fileobj* at a time.
.. warning::
This yields decompressed chunks; it does *not* split on lines. To get
lines, wrap this in :py:func:`to_lines`.
"""
if bz2 is None:
raise Exception(
'bz2 module was not successfully imported (likely not installed).')
d = bz2.BZ2Decompressor()
while True:
chunk = fileobj.read(bufsize)
if not chunk:
return
part = d.decompress(chunk)
if part:
yield part
def decomp_overlayzip(overlay_path, outfilename):
overlay_package = VMOverlayPackage(overlay_path)
meta_raw = overlay_package.read_meta()
meta_info = msgpack.unpackb(meta_raw)
comp_overlay_files = meta_info[Const.META_OVERLAY_FILES]
out_fd = open(outfilename, "w+b")
for blob_info in comp_overlay_files:
comp_filename = blob_info[Const.META_OVERLAY_FILE_NAME]
comp_type = blob_info.get(
Const.META_OVERLAY_FILE_COMPRESSION,
Const.COMPRESSION_LZMA)
if comp_type == Const.COMPRESSION_LZMA:
comp_data = overlay_package.read_blob(comp_filename)
decompressor = lzma.LZMADecompressor()
decomp_data = decompressor.decompress(comp_data)
decomp_data += decompressor.flush()
out_fd.write(decomp_data)
elif comp_type == Const.COMPRESSION_BZIP2:
comp_data = overlay_package.read_blob(comp_filename)
decompressor = bz2.BZ2Decompressor()
decomp_data = decompressor.decompress(comp_data)
out_fd.write(decomp_data)
elif comp_type == Const.COMPRESSION_GZIP:
comp_data = overlay_package.read_blob(comp_filename)
decomp_data = zlib.decompress(comp_data, zlib.MAX_WBITS | 16)
out_fd.write(decomp_data)
else:
raise CompressionError("Not valid compression option")
out_fd.close()
return meta_info
def _decomp(self):
is_proc_running = True
input_list = [self.task_queue._reader.fileno()]
while is_proc_running:
inready, outread, errready = select.select(input_list, [], [])
if self.task_queue._reader.fileno() in inready:
input_task = self.task_queue.get()
if input_task == Const.QUEUE_SUCCESS_MESSAGE:
is_proc_running = False
break
(comp_type, comp_data) = input_task
if comp_type == Const.COMPRESSION_LZMA:
decompressor = lzma.LZMADecompressor()
decomp_data = decompressor.decompress(comp_data)
decomp_data += decompressor.flush()
elif comp_type == Const.COMPRESSION_BZIP2:
decompressor = bz2.BZ2Decompressor()
decomp_data = decompressor.decompress(comp_data)
elif comp_type == Const.COMPRESSION_GZIP:
decomp_data = zlib.decompress(
comp_data,
zlib.MAX_WBITS | 16)
else:
raise CompressionError("Not valid compression option")
LOG.debug("%f\tdecompress one blob" % (time.time()))
self.output_queue.put(decomp_data)
self.command_queue.put("Compressed processed everything")
def _decompressor_stream(self): # pylint: disable=too-many-branches
dwnld_file = None
compression = False
if 'images' in self.parameters and self.key in self.parameters[
'images']:
compression = self.parameters['images'][self.key].get(
'compression', False)
else:
if self.key == 'ramdisk':
self.logger.debug(
"Not decompressing ramdisk as can be used compressed.")
else:
compression = self.parameters[self.key].get(
'compression', False)
fname, _ = self._url_to_fname_suffix(self.path, compression)
if os.path.isdir(fname):
raise JobError("Download '%s' is a directory, not a file" % fname)
if os.path.exists(fname):
os.remove(fname)
decompressor = None
if compression:
if compression == 'gz':
decompressor = zlib.decompressobj(16 + zlib.MAX_WBITS)
elif compression == 'bz2':
decompressor = bz2.BZ2Decompressor()
elif compression == 'xz':
decompressor = lzma.LZMADecompressor() # pylint: disable=no-member
self.logger.debug("Using %s decompression" % compression)
else:
self.logger.debug("No compression specified.")
def write(buff):
if decompressor:
try:
buff = decompressor.decompress(buff)
except EOFError as eof_exc:
# EOFError can be raised when decompressing a bz2 archive
# generated by pbzip2. If there is something in unsused_data
# try to continue decompression.
if compression == 'bz2' and decompressor.unused_data:
buff = decompressor.unused_data
else:
error_message = str(eof_exc)
self.logger.exception(error_message)
raise JobError(error_message)
except (IOError, lzma.error, zlib.error) as exc: # pylint: disable=no-member
error_message = str(exc)
self.logger.exception(error_message)
raise JobError(error_message)
dwnld_file.write(buff)
try:
with open(fname, 'wb') as dwnld_file:
yield (write, fname)
except (IOError, OSError) as exc:
msg = "Unable to open %s: %s" % (fname, exc.strerror)
self.logger.error(msg)
raise InfrastructureError(msg)
def storage_write_bz2(self, data, session=None):
self.mtda.debug(3, "main.storage_write_bz2()")
self._check_expired(session)
if self.sdmux_controller is None:
result = -1
else:
# Create a bz2 decompressor when called for the first time
if self.bz2dec is None:
self.bz2dec = bz2.BZ2Decompressor()
cont = True
start = time.monotonic()
result = -1
while cont is True:
# Decompress and write newly received data
try:
# Uncompress and write data
result = self._storage_write_bz2(data)
if result != 0:
# Either got an error or needing more data; escape from
# this loop to provide feedback
cont = False
else:
# Check if this loop has been running for quite
# some time, in which case we would to give our
# client an update
now = time.monotonic()
if (now - start) >= self.fbintvl:
cont = False
# If we should continue and do not need more data
# at this time, use an empty buffer for the next
# iteration
elif result == 0:
data = b''
except EOFError:
# Handle multi-streams: create a new decompressor and
# we will start with data unused from the previous
# decompressor
data = self.bz2dec.unused_data
self.bz2dec = bz2.BZ2Decompressor()
cont = (len(data) > 0) # loop only if we have unused data
result = 0 # we do not need more input data
self.mtda.debug(3, "main.storage_write_bz2(): %s" % str(result))
return result
def data_for_op(op, out_file, old_file):
args.payloadfile.seek(data_offset + op.data_offset)
data = args.payloadfile.read(op.data_length)
# assert hashlib.sha256(data).digest() == op.data_sha256_hash, 'operation data hash mismatch'
if op.type == op.REPLACE_XZ:
dec = lzma.LZMADecompressor()
data = dec.decompress(data)
out_file.seek(op.dst_extents[0].start_block * block_size)
out_file.write(data)
elif op.type == op.REPLACE_BZ:
dec = bz2.BZ2Decompressor()
data = dec.decompress(data)
out_file.seek(op.dst_extents[0].start_block * block_size)
out_file.write(data)
elif op.type == op.REPLACE:
out_file.seek(op.dst_extents[0].start_block * block_size)
out_file.write(data)
elif op.type == op.SOURCE_COPY:
if not args.diff:
print("SOURCE_COPY supported only for differential OTA")
sys.exit(-2)
out_file.seek(op.dst_extents[0].start_block * block_size)
for ext in op.src_extents:
old_file.seek(ext.start_block * block_size)
data = old_file.read(ext.num_blocks * block_size)
out_file.write(data)
elif op.type == op.SOURCE_BSDIFF:
if not args.diff:
print("SOURCE_BSDIFF supported only for differential OTA")
sys.exit(-3)
out_file.seek(op.dst_extents[0].start_block * block_size)
tmp_buff = io.BytesIO()
for ext in op.src_extents:
old_file.seek(ext.start_block * block_size)
old_data = old_file.read(ext.num_blocks * block_size)
tmp_buff.write(old_data)
tmp_buff.seek(0)
old_data = tmp_buff.read()
tmp_buff.seek(0)
tmp_buff.write(bsdiff4.patch(old_data, data))
n = 0
tmp_buff.seek(0)
for ext in op.dst_extents:
tmp_buff.seek(n * block_size)
n += ext.num_blocks
data = tmp_buff.read(ext.num_blocks * block_size)
out_file.seek(ext.start_block * block_size)
out_file.write(data)
elif op.type == op.ZERO:
for ext in op.dst_extents:
out_file.seek(ext.start_block * block_size)
out_file.write('\0' * ext.num_blocks * block_size)
else:
print("Unsupported type = %d" % op.type)
sys.exit(-1)
return data
def Parse(self, snbFile, metaOnly = False):
# Read header
vmbr = snbFile.read(44)
(self.magic, self.rev80, self.revA3, self.revZ1,
self.fileCount, self.vfatSize, self.vfatCompressed,
self.binStreamSize, self.plainStreamSizeUncompressed,
self.revZ2) = struct.unpack('>8siiiiiiiii', vmbr)
# Read FAT
self.vfat = zlib.decompress(snbFile.read(self.vfatCompressed))
self.ParseFile(self.vfat, self.fileCount)
# Read tail
snbFile.seek(-16, os.SEEK_END)
#plainStreamEnd = snbFile.tell()
tailblock = snbFile.read(16)
(self.tailSize, self.tailOffset, self.tailMagic) = struct.unpack('>ii8s', tailblock)
snbFile.seek(self.tailOffset)
self.vTailUncompressed = zlib.decompress(snbFile.read(self.tailSize))
self.tailSizeUncompressed = len(self.vTailUncompressed)
self.ParseTail(self.vTailUncompressed, self.fileCount)
# Uncompress file data
# Read files
binPos = 0
plainPos = 0
uncompressedData = None
for f in self.files:
if f.attr & 0x41000000 == 0x41000000:
# Compressed Files
if uncompressedData == None:
uncompressedData = ""
for i in range(self.plainBlock):
bzdc = bz2.BZ2Decompressor()
if (i < self.plainBlock - 1):
bSize = self.blocks[self.binBlock + i + 1].Offset - self.blocks[self.binBlock + i].Offset
else:
bSize = self.tailOffset - self.blocks[self.binBlock + i].Offset
snbFile.seek(self.blocks[self.binBlock + i].Offset)
try:
data = snbFile.read(bSize)
if len(data) < 32768:
uncompressedData += bzdc.decompress(data)
else:
uncompressedData += data
except Exception as e:
print e
if len(uncompressedData) != self.plainStreamSizeUncompressed:
raise Exception()
f.fileBody = uncompressedData[plainPos:plainPos+f.fileSize]
plainPos += f.fileSize
elif f.attr & 0x01000000 == 0x01000000:
# Binary Files
snbFile.seek(44 + self.vfatCompressed + binPos)
f.fileBody = snbFile.read(f.fileSize)
binPos += f.fileSize
else:
print f.attr, f.fileName
raise Exception("Invalid file")
def decompress(self, data):
""" Create a bz2 decompressor and decompress some data.
:return: data as a bytes object.
"""
decompressor = bz2.BZ2Decompressor()
data = decompressor.decompress(data)
return data
def iter_decode(fileobj):
"""Iterate through decoded fragments of the file"""
decompressor = bz2.BZ2Decompressor()
for line in fileobj:
try:
yield decompressor.decompress(line)
except EOFError:
return
def __init__(self, fileobj):
self._fileobj = fileobj
self._bz2 = bz2.BZ2Decompressor()
self._line_buffer = collections.deque([""])
self._current_line = ""
self._current_offset = 0
def _initialize_decompressor(self):
if self._compression_type == CompressionTypes.BZIP2:
self._decompressor = bz2.BZ2Decompressor()
elif self._compression_type == CompressionTypes.DEFLATE:
self._decompressor = zlib.decompressobj()
else:
assert self._compression_type == CompressionTypes.GZIP
self._decompressor = zlib.decompressobj(self._gzip_mask)
def get_content(self) -> Generator[str, None, None]:
"""Yields processed pieces of content"""
# https://docs.python.org/3.6/library/bz2.html#bz2.BZ2Decompressor
decompressor = bz2.BZ2Decompressor()
with self.fetch() as content:
for chunk in content:
yield decompressor.decompress(chunk)
def bz2_stream(compressed, chunksize=100000):
""" Stream lines from a chunk of compressed bz2 data """
decompressor = bz2.BZ2Decompressor()
for i in range(0, len(compressed), chunksize):
chunk = compressed[i:i + chunksize]
decompressed = decompressor.decompress(chunk).decode()
for line in decompressed.split('\n'):
yield line + '\n'
def _decompress_arxiv(arxiv):
inc_decompressor = bz2.BZ2Decompressor()
logger.debug('Extracting archive {}'.format(arxiv))
output_arxiv_filepath = arxiv.rsplit('.bz2')[0]
with open(arxiv, 'rb') as arxiv_byte_stream:
with open(output_arxiv_filepath, 'wb') as out_stream:
for data in iter(lambda: arxiv_byte_stream.read(100 * 1024), b''):
out_stream.write(inc_decompressor.decompress(data))
def decompress(self, dat):
dat = encode_something_to_bytes(dat)
if dat.startswith(b'BZ'):
try:
return bz2.BZ2Decompressor().decompress(dat)
except IOError:
pass
return dat
def _read_bzip(self, coder, input, level, num_coders):
dec = bz2.BZ2Decompressor()
return self._read_from_decompressor(coder,
dec,
input,
level,
num_coders,
can_partial_decompress=False)
