security-and-privacy/mat2
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mat2
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Do a pylint pass

This commit is contained in:
jvoisin 2018-05-16 22:36:59 +02:00
parent 0354c3b7e3
commit fa7d18784c
9 changed files with 89 additions and 79 deletions
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20
main.py
View File

@ -12,7 +12,7 @@ from src import parser_factory, unsupported_extensions
__version__ = '0.1.0'
def __check_file(filename:str, mode:int = os.R_OK) -> bool:
def __check_file(filename: str, mode: int = os.R_OK) -> bool:
if not os.path.isfile(filename):
print("[-] %s is not a regular file." % filename)
return False
@ -26,9 +26,9 @@ def create_arg_parser():
parser = argparse.ArgumentParser(description='Metadata anonymisation toolkit 2')
parser.add_argument('files', nargs='*')
parser.add_argument('-v', '--version', action='version',
version='MAT2 %s' % __version__)
version='MAT2 %s' % __version__)
parser.add_argument('-l', '--list', action='store_true',
help='list all supported fileformats')
help='list all supported fileformats')
info = parser.add_mutually_exclusive_group()
info.add_argument('-c', '--check', action='store_true',
@ -40,7 +40,7 @@ def create_arg_parser():
return parser
def show_meta(filename:str):
def show_meta(filename: str):
if not __check_file(filename):
return
@ -48,18 +48,18 @@ def show_meta(filename:str):
if p is None:
print("[-] %s's format (%s) is not supported" % (filename, mtype))
return
print("[+] Metadata for %s:" % filename)
for k,v in p.get_meta().items():
for k, v in p.get_meta().items():
try: # FIXME this is ugly.
print(" %s: %s" % (k, v))
except UnicodeEncodeError:
print(" %s: harmful content" % k)
def clean_meta(params:Tuple[str, bool]) -> bool:
def clean_meta(params: Tuple[str, bool]) -> bool:
filename, is_lightweigth = params
if not __check_file(filename, os.R_OK|os.W_OK):
return
return False
p, mtype = parser_factory.get_parser(filename)
if p is None:
@ -102,12 +102,12 @@ def main():
if not args.list:
return arg_parser.print_help()
show_parsers()
return
return 0
elif args.show:
for f in __get_files_recursively(args.files):
show_meta(f)
return
return 0
else:
p = multiprocessing.Pool()

3
src/__init__.py
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@ -2,4 +2,5 @@
# A set of extension that aren't supported, despite matching a supported mimetype
unsupported_extensions = set(['bat', 'c', 'h', 'ksh', 'pl', 'txt', 'asc',
'text', 'pot', 'brf', 'srt', 'rdf', 'wsdl', 'xpdl', 'xsl', 'xsd'])
'text', 'pot', 'brf', 'srt', 'rdf', 'wsdl',
'xpdl', 'xsl', 'xsd'])

2
src/audio.py
View File

@ -9,7 +9,7 @@ class MutagenParser(abstract.AbstractParser):
def get_meta(self):
f = mutagen.File(self.filename)
if f.tags:
return {k:', '.join(v) for k,v in f.tags.items()}
return {k:', '.join(v) for k, v in f.tags.items()}
return {}
def remove_all(self):

1
src/harmless.py
View File

@ -6,6 +6,7 @@ class HarmlessParser(abstract.AbstractParser):
mimetypes = {'application/xml', 'text/plain'}
def __init__(self, filename: str):
super().__init__(filename)
self.filename = filename
self.output_filename = filename

59
src/images.py
View File

@ -14,11 +14,12 @@ from . import abstract
class PNGParser(abstract.AbstractParser):
mimetypes = {'image/png', }
meta_whitelist = {'SourceFile', 'ExifToolVersion', 'FileName',
'Directory', 'FileSize', 'FileModifyDate', 'FileAccessDate',
"FileInodeChangeDate", 'FilePermissions', 'FileType',
'FileTypeExtension', 'MIMEType', 'ImageWidth', 'BitDepth', 'ColorType',
'Compression', 'Filter', 'Interlace', 'BackgroundColor', 'ImageSize',
'Megapixels', 'ImageHeight'}
'Directory', 'FileSize', 'FileModifyDate',
'FileAccessDate', 'FileInodeChangeDate',
'FilePermissions', 'FileType', 'FileTypeExtension',
'MIMEType', 'ImageWidth', 'BitDepth', 'ColorType',
'Compression', 'Filter', 'Interlace', 'BackgroundColor',
'ImageSize', 'Megapixels', 'ImageHeight'}
def __init__(self, filename):
super().__init__(filename)
@ -63,36 +64,38 @@ class GdkPixbufAbstractParser(abstract.AbstractParser):
class JPGParser(GdkPixbufAbstractParser):
mimetypes = {'image/jpeg'}
meta_whitelist = {'SourceFile', 'ExifToolVersion', 'FileName',
'Directory', 'FileSize', 'FileModifyDate', 'FileAccessDate',
"FileInodeChangeDate", 'FilePermissions', 'FileType',
'FileTypeExtension', 'MIMEType', 'ImageWidth',
'ImageSize', 'BitsPerSample', 'ColorComponents', 'EncodingProcess',
'JFIFVersion', 'ResolutionUnit', 'XResolution', 'YCbCrSubSampling',
'YResolution', 'Megapixels', 'ImageHeight'}
'Directory', 'FileSize', 'FileModifyDate',
'FileAccessDate', "FileInodeChangeDate",
'FilePermissions', 'FileType', 'FileTypeExtension',
'MIMEType', 'ImageWidth', 'ImageSize', 'BitsPerSample',
'ColorComponents', 'EncodingProcess', 'JFIFVersion',
'ResolutionUnit', 'XResolution', 'YCbCrSubSampling',
'YResolution', 'Megapixels', 'ImageHeight'}
class TiffParser(GdkPixbufAbstractParser):
mimetypes = {'image/tiff'}
meta_whitelist = {'Compression', 'ExifByteOrder', 'ExtraSamples',
'FillOrder', 'PhotometricInterpretation', 'PlanarConfiguration',
'RowsPerStrip', 'SamplesPerPixel', 'StripByteCounts',
'StripOffsets', 'BitsPerSample', 'Directory', 'ExifToolVersion',
'FileAccessDate', 'FileInodeChangeDate', 'FileModifyDate',
'FileName', 'FilePermissions', 'FileSize', 'FileType',
'FileTypeExtension', 'ImageHeight', 'ImageSize', 'ImageWidth',
'MIMEType', 'Megapixels', 'SourceFile'}
'FillOrder', 'PhotometricInterpretation',
'PlanarConfiguration', 'RowsPerStrip', 'SamplesPerPixel',
'StripByteCounts', 'StripOffsets', 'BitsPerSample',
'Directory', 'ExifToolVersion', 'FileAccessDate',
'FileInodeChangeDate', 'FileModifyDate', 'FileName',
'FilePermissions', 'FileSize', 'FileType',
'FileTypeExtension', 'ImageHeight', 'ImageSize',
'ImageWidth', 'MIMEType', 'Megapixels', 'SourceFile'}
class BMPParser(GdkPixbufAbstractParser):
mimetypes = {'image/x-ms-bmp'}
meta_whitelist = {'SourceFile', 'ExifToolVersion', 'FileName', 'Directory',
'FileSize', 'FileModifyDate', 'FileAccessDate',
'FileInodeChangeDate', 'FilePermissions', 'FileType',
'FileTypeExtension', 'MIMEType', 'BMPVersion', 'ImageWidth',
'ImageHeight', 'Planes', 'BitDepth', 'Compression', 'ImageLength',
'PixelsPerMeterX', 'PixelsPerMeterY', 'NumColors',
'NumImportantColors', 'RedMask', 'GreenMask', 'BlueMask',
'AlphaMask', 'ColorSpace', 'RedEndpoint', 'GreenEndpoint',
'BlueEndpoint', 'GammaRed', 'GammaGreen', 'GammaBlue', 'ImageSize',
'Megapixels'}
'FileSize', 'FileModifyDate', 'FileAccessDate',
'FileInodeChangeDate', 'FilePermissions', 'FileType',
'FileTypeExtension', 'MIMEType', 'BMPVersion',
'ImageWidth', 'ImageHeight', 'Planes', 'BitDepth',
'Compression', 'ImageLength', 'PixelsPerMeterX',
'PixelsPerMeterY', 'NumColors', 'NumImportantColors',
'RedMask', 'GreenMask', 'BlueMask', 'AlphaMask',
'ColorSpace', 'RedEndpoint', 'GreenEndpoint',
'BlueEndpoint', 'GammaRed', 'GammaGreen', 'GammaBlue',
'ImageSize', 'Megapixels'}

27
src/office.py
View File

@ -9,14 +9,14 @@ from . import abstract, parser_factory
class ArchiveBasedAbstractParser(abstract.AbstractParser):
def _clean_zipinfo(self, zipinfo:zipfile.ZipInfo) -> zipfile.ZipInfo:
def _clean_zipinfo(self, zipinfo: zipfile.ZipInfo) -> zipfile.ZipInfo:
zipinfo.compress_type = zipfile.ZIP_DEFLATED
zipinfo.create_system = 3 # Linux
zipinfo.comment = b''
zipinfo.date_time = (1980, 1, 1, 0, 0, 0)
return zipinfo
def _get_zipinfo_meta(self, zipinfo:zipfile.ZipInfo) -> dict:
def _get_zipinfo_meta(self, zipinfo: zipfile.ZipInfo) -> dict:
metadata = {}
if zipinfo.create_system == 3:
#metadata['create_system'] = 'Linux'
@ -35,7 +35,8 @@ class ArchiveBasedAbstractParser(abstract.AbstractParser):
return metadata
def _clean_internal_file(self, item:zipfile.ZipInfo, temp_folder:str, zin:zipfile.ZipFile, zout:zipfile.ZipFile):
def _clean_internal_file(self, item: zipfile.ZipInfo, temp_folder: str,
zin: zipfile.ZipFile, zout: zipfile.ZipFile):
zin.extract(member=item, path=temp_folder)
tmp_parser, mtype = parser_factory.get_parser(os.path.join(temp_folder, item.filename))
if not tmp_parser:
@ -50,9 +51,9 @@ class ArchiveBasedAbstractParser(abstract.AbstractParser):
class MSOfficeParser(ArchiveBasedAbstractParser):
mimetypes = {
'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
'application/vnd.openxmlformats-officedocument.presentationml.presentation'
'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
'application/vnd.openxmlformats-officedocument.presentationml.presentation'
}
files_to_keep = {'_rels/.rels', 'word/_rels/document.xml.rels'}
@ -103,13 +104,13 @@ class MSOfficeParser(ArchiveBasedAbstractParser):
class LibreOfficeParser(ArchiveBasedAbstractParser):
mimetypes = {
'application/vnd.oasis.opendocument.text',
'application/vnd.oasis.opendocument.spreadsheet',
'application/vnd.oasis.opendocument.presentation',
'application/vnd.oasis.opendocument.graphics',
'application/vnd.oasis.opendocument.chart',
'application/vnd.oasis.opendocument.formula',
'application/vnd.oasis.opendocument.image',
'application/vnd.oasis.opendocument.text',
'application/vnd.oasis.opendocument.spreadsheet',
'application/vnd.oasis.opendocument.presentation',
'application/vnd.oasis.opendocument.graphics',
'application/vnd.oasis.opendocument.chart',
'application/vnd.oasis.opendocument.formula',
'application/vnd.oasis.opendocument.image',
}
def get_meta(self):

2
src/parser_factory.py
View File

@ -2,10 +2,10 @@ import os
import mimetypes
import importlib
import pkgutil
from typing import TypeVar
from . import abstract, unsupported_extensions
from typing import TypeVar
T = TypeVar('T', bound='abstract.AbstractParser')

12
src/pdf.py
View File

@ -21,8 +21,8 @@ logging.basicConfig(level=logging.DEBUG)
class PDFParser(abstract.AbstractParser):
mimetypes = {'application/pdf', }
meta_list = {'author', 'creation-date', 'creator', 'format', 'keywords',
'metadata', 'mod-date', 'producer', 'subject', 'title',
'viewer-preferences'}
'metadata', 'mod-date', 'producer', 'subject', 'title',
'viewer-preferences'}
def __init__(self, filename):
super().__init__(filename)
@ -103,7 +103,8 @@ class PDFParser(abstract.AbstractParser):
return True
def __remove_superficial_meta(self, in_file:str, out_file: str) -> bool:
@staticmethod
def __remove_superficial_meta(in_file: str, out_file: str) -> bool:
document = Poppler.Document.new_from_file('file://' + in_file)
document.set_producer('')
document.set_creator('')
@ -112,7 +113,8 @@ class PDFParser(abstract.AbstractParser):
return True
def __parse_metadata_field(self, data:str) -> dict:
@staticmethod
def __parse_metadata_field(data: str) -> dict:
metadata = {}
for (_, key, value) in re.findall(r"<(xmp|pdfx|pdf|xmpMM):(.+)>(.+)</\1:\2>", data, re.I):
metadata[key] = value
@ -128,6 +130,6 @@ class PDFParser(abstract.AbstractParser):
if document.get_property(key):
metadata[key] = document.get_property(key)
if 'metadata' in metadata:
parsed_meta = self.__parse_metadata_field(metadata['metadata'])
parsed_meta = self.__parse_metadata_field(metadata['metadata'])
return {**metadata, **parsed_meta}
return metadata

42
src/torrent.py
View File

@ -11,7 +11,7 @@ class TorrentParser(abstract.AbstractParser):
d = _BencodeHandler().bdecode(f.read())
if d is None:
return {'Unknown meta': 'Unable to parse torrent file "%s".' % self.filename}
for k,v in d.items():
for k, v in d.items():
if k not in self.whitelist:
metadata[k.decode('utf-8')] = v
return metadata
@ -23,7 +23,7 @@ class TorrentParser(abstract.AbstractParser):
d = _BencodeHandler().bdecode(f.read())
if d is None:
return False
for k,v in d.items():
for k, v in d.items():
if k in self.whitelist:
cleaned[k] = v
with open(self.output_filename, 'wb') as f:
@ -39,21 +39,22 @@ class _BencodeHandler(object):
"""
def __init__(self):
self.__decode_func = {
ord('d'): self.__decode_dict,
ord('i'): self.__decode_int,
ord('l'): self.__decode_list,
}
ord('d'): self.__decode_dict,
ord('i'): self.__decode_int,
ord('l'): self.__decode_list,
}
for i in range(0, 10):
self.__decode_func[ord(str(i))] = self.__decode_string
self.__encode_func = {
bytes: self.__encode_string,
dict: self.__encode_dict,
int: self.__encode_int,
list: self.__encode_list,
bytes: self.__encode_string,
dict: self.__encode_dict,
int: self.__encode_int,
list: self.__encode_list,
}
def __decode_int(self, s:str) -> (int, str):
@staticmethod
def __decode_int(s: str) -> (int, str):
s = s[1:]
next_idx = s.index(b'e')
if s.startswith(b'-0'):
@ -62,7 +63,8 @@ class _BencodeHandler(object):
raise ValueError # no leading zero except for zero itself
return int(s[:next_idx]), s[next_idx+1:]
def __decode_string(self, s:str) -> (str, str):
@staticmethod
def __decode_string(s: str) -> (str, str):
sep = s.index(b':')
str_len = int(s[:sep])
if str_len < 0:
@ -72,7 +74,7 @@ class _BencodeHandler(object):
s = s[1:]
return s[sep:sep+str_len], s[sep+str_len:]
def __decode_list(self, s:str) -> (list, str):
def __decode_list(self, s: str) -> (list, str):
r = list()
s = s[1:] # skip leading `l`
while s[0] != ord('e'):
@ -80,7 +82,7 @@ class _BencodeHandler(object):
r.append(v)
return r, s[1:]
def __decode_dict(self, s:str) -> (dict, str):
def __decode_dict(self, s: str) -> (dict, str):
r = dict()
s = s[1:] # skip leading `d`
while s[0] != ord(b'e'):
@ -89,30 +91,30 @@ class _BencodeHandler(object):
return r, s[1:]
@staticmethod
def __encode_int(x:str) -> bytes:
def __encode_int(x: str) -> bytes:
return b'i' + bytes(str(x), 'utf-8') + b'e'
@staticmethod
def __encode_string(x:str) -> bytes:
def __encode_string(x: str) -> bytes:
return bytes((str(len(x))), 'utf-8') + b':' + x
def __encode_list(self, x:str) -> bytes:
def __encode_list(self, x: str) -> bytes:
ret = b''
for i in x:
ret += self.__encode_func[type(i)](i)
return b'l' + ret + b'e'
def __encode_dict(self, x:str) -> bytes:
def __encode_dict(self, x: str) -> bytes:
ret = b''
for k, v in sorted(x.items()):
ret += self.__encode_func[type(k)](k)
ret += self.__encode_func[type(v)](v)
return b'd' + ret + b'e'
def bencode(self, s:str) -> bytes:
def bencode(self, s: str) -> bytes:
return self.__encode_func[type(s)](s)
def bdecode(self, s:str):
def bdecode(self, s: str):
try:
r, l = self.__decode_func[s[0]](s)
except (IndexError, KeyError, ValueError) as e: