running MAT2 on Whonix

Support
1

Hi everybody.

I’m new to Whonix and Linux in general. I am using Whonix in Virtual Box (Non-Qube).
I tried to run MAT2 (Metadata Anonymisation Toolkit v2).
When running mat2 with flag “s” for a file.PNG (8KiB) it says: bwrap: setting up uid map: No such file or directory
After this message, the process is running for several minutes but nothing is happening. I then cancelled it.

Is this normal behavior, the process just takes that much time and I would just have needed to wait some more minutes to finish the run successfully?
Or is there something going wrong with bwrap? I already found the instructions on this page:
http:/…ww.dds6qkxpwdeubwucdiaord2xgbbeyds25rbsgr73tbfpqpt4a6vjwsyd.onion/wiki/Metadata#Use_Instructions
(Not allowed to add links to my post)
Seems there were some problems with bubblewrapper, but I am not quite sure if that’s a related problem. Also the mentioned solution “–no-sandbox” does not work for me. It says, this flag does not exist.

Can someone help me how to proceed to to get MAT2 running on Whonix?

3

Your choices are uninstalling bubblewrap or starting mat2 with the --no-sanbox flag. Note this flag is used for bwrap on the commandline and not mat2 which will not recognize it.

4

Any idea what’s breaking bubblewrap?

//cc @madaidan

5

Thanks for this information. Regarding the second option: How does this work?
According to the bwrap manual page, the --no-sandbox flag does not exist for bwrap. Furthermore when starting mat2, how can I hand over this flag to bwrap?
Guess this is some basic linux understanding issue, but anyway I’d be thankful for any hint or a link to further guidance.

6

I’m unfamiliar with bwrap commands and the manual doesn’t have a --no-sandbox option. Try uninstalling bwrap

7

I can confirm that after uninstalling bubblewrap I was able to run mat2.
But unfortunately Tor browser was not running anymore after rebooting the system. Installing bubblewrap again did not fix the issue.

Can’t tell a 100% this error happened due to uninstalling bubblewrap, since I also updated Whonix after the reboot.
If you are interested in the error message for maintenance purpose, I can look it up and add it later on.

8

Could be unrelated. Please create a new forum thread for that. You can add a link to it here.

9

This will be functional with Whonix stable-proposed-updates repository. At some unknown point in time also in Whonix stable repository.

Will as well be fixed in next Whonix version number equal or grater than 15.0.1.4.5 once released. I tested mat2 just now (while bubblewrap was installed) in Whonix developers-only version 15.0.1.4.5.

Because it’s not using hidepid anymore.

10

mat2 must be run with --no-sandbox.

11

I can confirm that mat2 still doesn’t work on Whonix. I use recent version of Whonix-Workstation updated via upgrade-nonroot. The same error bwrap: setting up uid map: No such file or directory. Are you going to fix it? I don’t want to decrease privacy through bwrap removing

12

working on my end by using: (Qubes)

mat2 picture.png

upgrade should be done via sudo apt commands. (mat2 installed by default)

1 Like
13

I use non-qubes Whonix (VirtualBox) and mat2 returns me an error

Any difference from apt? I thought that upgrade-nonroot is just script for apt.

14

Specifics can change over time.

Documentation will be kept up to date:

15

I’ve found out that mat2 version preinstalled in Whonix-Workstation is 0.8.0 from buster repository and it doesn’t have --no-sandbox flag. I upgraded mat2 to version 0.10.0 from buster-backports repository which has --no-sandbox option but it still doesn’t work. Returns the same error:

bwrap: setting up uid map: No such file or directory

Please help. Non-qubes Whonix (VirtualBox).

16

Please help. Non-qubes Whonix (VirtualBox).

I just have tested this using whonix-vbox, it worked smoothly without
any additional commands (mat2 xyz.png) .

You have done something wrong on your vm not done by default on whonix.

1 Like
17

I disabled Whonix-Workstation firewall because I had to run Anbox on top of my Workstation and I can confirm that mat2 doesn’t work.

bwrap: setting up uid map: No such file or directory

18

anbox has nothing to do with mat2, mat2 working out of the box within
whonix fresh installation.

no further help can be provided.

1 Like
19

Thank you. I’ve just installed newer version of mat2 from buster-backports repository and then rebooted Workstation. Somehow everything works fine now!

1 Like