security-and-privacy/mat2
security-and-privacy/mat2
1
0
Fork 0
mirror of synced 2024-11-22 09:14:23 +01:00
Code Releases Activity
mat2 is a metadata removal tool, supporting a wide range of commonly used file formats, written in python3: at its core, it's a library, used by an eponymous command-line interface, and a nautilus extension.
237 Commits 1 Branch 26 Tags 12 MiB
Python 99.8%
HTML 0.1%
CSS 0.1%
4192a2daa3
Go to file
Daniel Kahn Gillmor 4192a2daa3 office: create policy for what to do about unknown members 
previously, encountering an unknown member meant that any parser of
this type would abort.

now, the user can set parser.unknown_member_policy to either 'omit' or
'keep' if they don't want the current action of 'abort'

note that this causes pylint to complain about branching depth for
remove_all() because of the nuanced error-handling.  I've disabled
this check.
2018-09-04 16:13:33 -04:00
data Change mat2's logo 2018-08-03 21:45:41 +02:00
doc Bump the changelog 2018-09-01 16:00:41 +02:00
libmat2 office: create policy for what to do about unknown members 2018-09-04 16:13:33 -04:00
nautilus nautilus: rename the nautilus plugin 2018-08-26 01:09:41 +02:00
tests Logging cleanup 2018-09-01 05:14:32 -07:00
.gitignore gitignore: exclude all hidden files from being committed 2018-08-24 09:14:05 +02:00
.gitlab-ci.yml Add archlinux to the CI 2018-09-01 15:41:22 +02:00
.mailmap Add a .mailmap file 2018-09-01 16:12:03 +02:00
.pylintrc Add pylint3 to the ci 2018-07-09 01:22:08 +02:00
CHANGELOG.md Bump the changelog 2018-09-01 16:00:41 +02:00
CONTRIBUTING.md Update the release process to create signed tarballs 2018-09-03 14:28:00 +02:00
INSTALL.md Fix some leftovers from the previous commit 2018-08-26 01:10:48 +02:00
LICENSE Add LICENSE 2018-03-31 07:00:14 -07:00
mat2 Bump the changelog 2018-09-01 16:00:41 +02:00
README.md Add a link to the mailing list 2018-09-01 16:45:20 +02:00
setup.py Bump the changelog 2018-09-01 16:00:41 +02:00

README.md 

 _____ _____ _____ ___
|     |  _  |_   _|_  |  Keep your data,
| | | |     | | | |  _|     trash your meta!
|_|_|_|__|__| |_| |___|

This software is currently in beta, please don't use it for anything critical.

Metadata and privacy

Metadata consist of information that characterizes data. Metadata are used to provide documentation for data products. In essence, metadata answer who, what, when, where, why, and how about every facet of the data that are being documented.

Metadata within a file can tell a lot about you. Cameras record data about when a picture was taken and what camera was used. Office documents like PDF or Office automatically adds author and company information to documents and spreadsheets. Maybe you don't want to disclose those information on the web.

This is precisely the job of MAT2: getting rid, as much as possible, of metadata.

Requirements

  • python3-mutagen for audio support
  • python3-gi-cairo and gir1.2-poppler-0.18 for PDF support
  • gir1.2-gdkpixbuf-2.0 for images support
  • libimage-exiftool-perl for everything else

Please note that MAT2 requires at least Python3.5, meaning that it doesn't run on Debian Jessie,

Running the test suite

$ python3 -m unittest discover -v

How to use MAT2

usage: mat2 [-h] [-v] [-l] [-s | -L] [files [files ...]]

Metadata anonymisation toolkit 2

positional arguments:
  files

optional arguments:
  -h, --help         show this help message and exit
  -v, --version      show program's version number and exit
  -l, --list         list all supported fileformats
  -s, --show         list all the harmful metadata of a file without removing
                     them
  -L, --lightweight  remove SOME metadata

Notes about detecting metadata

While MAT2 is doing its very best to display metadata when the --show flag is passed, it doesn't mean that a file is clean from any metadata if MAT2 doesn't show any. There is no reliable way to detect every single possible metadata for complex file formats.

This is why you shouldn't rely on metadata's presence to decide if your file must be cleaned or not.

Related software

Contact

If possible, use the issues system or the mailing list Should a more private contact be needed (eg. for reporting security issues), you can email Julien (jvoisin) Voisin at julien.voisin+mat@dustri.org, using the gpg key 9FCDEE9E1A381F311EA62A7404D041E8171901CC.

License

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Copyright 2018 Julien (jvoisin) Voisin julien.voisin+mat2@dustri.org Copyright 2016 Marie Rose for MAT2's logo

Thanks

MAT2 wouldn't exist without:

Many thanks to them!