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• Launchpad Entry: encrypted-filesystems

• Packages affected: partman, ubiquity, cryptsetup

Summary

The Gutsy Gibbon Alternate installer introduced the possiblity to configure encrypted devices (with cryptsetup/LUKS and dm-crypt) and offers a standard partman recipe ("Use entire disk with encryption"). For Hardy we review the current problems with it and add more use cases.

• Provide support for it in ubiquity
• Offer encryption support for autoresizing and "automatically partition free space" modes, too.
• Consider support for key files (on USB sticks, etc) instead of/in addition to passphrases.

Release Note

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It is mandatory.

Rationale

This should cover the _why_: why is this change being proposed, what justifies it, where we see this justified.

Use Cases

* Consider an administrator Bob, who maintains a fleet of machines that are auto-installed by means of debconf seeding. To what extent can he automate the configuration of encrypted partitions with debconf in an automated way? How much granularity will the debconf integration afford him, compared to his GUIed installer counterparts?

• Uli the user boots a machine with a series of encrypted filesystems that are all encrypted with the same passphrase. This passphrase should need to be entered only once.

Assumptions

Design

You can have subsections that better describe specific parts of the issue.

Implementation

This section should describe a plan of action (the "how") to implement the changes discussed. Could include subsections like:

UI Changes

Should cover changes required to the UI, or specific UI that is required to implement this

Code Changes

Code changes should include an overview of what needs to change, and in some cases even the specific details.

Migration

Include:

• data migration, if any
• redirects from old URLs to new ones, if any
• how users will be pointed to the new way of doing things, if necessary.

Test/Demo Plan

It's important that we are able to test new features, and demonstrate them to users. Use this section to describe a short plan that anybody can follow that demonstrates the feature is working. This can then be used during CD testing, and to show off after release.

This need not be added or completed until the specification is nearing beta.

Outstanding Issues

This should highlight any issues that should be addressed in further specifications, and not problems with the specification itself; since any specification with problems cannot be approved.

BoF agenda and discussion

• breaks with separate encrypted swap and separate /usr, fixed in hardy
• don't default to "Ubuntu" VG name, clashes if you put it to another machine
  • (LVs are unique to their VG, so can have the same names)
• crypto support in ubiquity is blocked by missing LVM support
  • - LVM in ubiquity is missing UI
• compromise: only offer automatic partitionoing and waive the manual UI for hardy
• add encyption/lvm option in autoresize mode, since it is a very common use case
• keep conf/cryptroot and /etc/cryptsetup, but don't bother much about non-LUKS
  • compatibility. (i.e. may be stripped off)
• use a usb key for crypted rootfs
  • - initramfs check for the removable media (usb-stick)
    • - is the device already settled? how long do we need to wait? - ask for "enter your password or insert your usbstick with key"
• provide a mechanism for /etc/keys/$UUID
  • - craft some integration in gnome-mount/hal
• write a key managment application for creating the usb sticks or
  • placing keyfiles in /etc/keys/$UUID or the user's home

CategorySpec