[tor-dev] Help us build Tails 3.2~alpha1 build reproducibly

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Dear Tails and Tor contributors, dear Reproducible Builds community,

We have sent out a first call [1] for testing to build Tails 3.1 reproducibly and we have received some build reports. Thank you very much for your help! We have since then tried to fix most of the identified issues [2] in Tails 3.2~alpha1, and thus we'd kindly like to ask you to try to build the new ISO image again, or even for the first time. Please don't hesitate to contact us if you get stuck at some point in the process, for example by connecting to our chatroom [3]! You can also send us email to tails-dev at boum.org (public) or tails at boum.org (private).

Note that Tails 3.2~alpha1 is *not* recommended for real usage, since it has not gone through *any* QA. Please use Tails 3.1 instead until Tails 3.2 is released!

# How?

For your convenience all instructions needed to attempt to reproduce Tails 3.2~alpha1 are included hereafter. However all commands are adapted for Debian Stretch (and Buster/Sid), so your results may vary if you run another Linux distribution. Our full build instructions [4] might help if you are having problems.

## Setup the build environment

Building Tails requires the KVM virtual machine hypervisor to be available, a minimum of 1 GiB of free RAM and a maximum of 20 GB of free storage.

### Install dependencies

sudo apt-get install \ git \ rake \ libvirt-daemon-system \ dnsmasq-base \ ebtables \ qemu-system-x86 \ qemu-utils \ vagrant \ vagrant-libvirt \ vmdebootstrap && \ sudo systemctl restart libvirtd

### If building as a non-root user

(Skip this section if you intend to build Tails as the root user!)

Make sure that the user that is supposed to initiate the build is part of the relevant groups:

for group in kvm libvirt libvirt-qemu; do sudo adduser $user $group; done

Then run `newgrp` (or just reboot) to apply the new group memberships to the session.

## Build Tails 3.2~alpha1

git clone https://git-tails.immerda.ch/tails cd tails git checkout 3.2~alpha1 git submodule update --init rake build

# Send us feedback!

No matter how your build attempt turned out we are interested in you sending us feedback. For that we'll first need some information of the system you used -- please run these commands in the exact same terminal session that you ran `rake build` in (e.g. run them right after `rake build`)!

sudo apt install apt-show-versions || : ( for f in /etc/issue /proc/cpuinfo do echo "--- File: ${f} ---" cat "${f}" echo done for c in free locale env 'uname -a' '/usr/sbin/libvirtd --version' \ 'qemu-system-x86_64 --version' 'vagrant --version' do echo "--- Command: ${c} ---" eval "${c}" echo done if which apt-show-versions >/dev/null then echo '--- APT package versions ---' apt-show-versions qemu:amd64 linux-image-amd64:amd64 vagrant \ libvirt0:amd64 fi ) | bzip2 > system-info.txt.bz2

Please have a look at the generated file with

bzless system-info.txt.bz2

to make sure it doesn't contain any sensitive information you do not want to leak in case you send this file to us or make it public!

Next, please follow the instructions below that match your situation!

## If the build failed.

Please open a ticket on our bug tracker [5] with "Category" set to "Build system" and `system-info.txt.bz2` attached (note that this makes this file public).

## If the build succeeded ...

Please compute the SHA-512 checksum of the resulting ISO image:

sha512sum tails-amd64-3.2~alpha1.iso

and compare it to:

1c928336264fc44821562f2fffbda4da97dcdc38072fce58f55b749fde04ac60055273cfc021b6c57120c5d276980859ffa3a5b0bd0f9c98851f34b682a09b02 tails-amd64-3.2~alpha1.iso

Bonus points if you verify the signed (with: [8]) message containing the checksum below (note that manually inserted line-wraps marked with "``"). If you run Tails, the verification is very easy! :) [9]

- -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512

$ sha512sum tails-amd64-3.2~alpha1.iso 1c928336264fc44821562f2fffbda4da97dcdc38072fce58f55b749f \ de04ac60055273cfc021b6c57120c5d276980859ffa3a5b0bd0f9c98 \ 851f34b682a09b02 tails-amd64-3.2~alpha1.iso