[Bug 1946787] Re: [SRU] Fix inconsistent encoding secret encoding

[Steve Langasek]

Hello Corey, or anyone else affected,

Accepted barbican into focal-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/barbican/1:10.1.0-0ubuntu2 in a few
hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
focal to verification-done-focal. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-focal. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: barbican (Ubuntu Focal)
       Status: Triaged => Fix Committed

** Tags added: verification-needed-focal

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https://bugs.launchpad.net/bugs/1946787

Title:
  [SRU] Fix inconsistent encoding secret encoding

Status in Ubuntu Cloud Archive:
  Fix Released
Status in Ubuntu Cloud Archive ussuri series:
  Triaged
Status in Ubuntu Cloud Archive victoria series:
  Fix Committed
Status in Ubuntu Cloud Archive wallaby series:
  Fix Released
Status in Ubuntu Cloud Archive xena series:
  Fix Released
Status in barbican package in Ubuntu:
  Fix Released
Status in barbican source package in Focal:
  Fix Committed
Status in barbican source package in Hirsute:
  Fix Released
Status in barbican source package in Impish:
  Fix Released

Bug description:
  [Impact]
  This SRU corresponds with the following story for upstream barbican
  https://storyboard.openstack.org/#!/story/2008335.

  The problem is some secrets were stored in plaintext and some were
  stored encoded. This resulted in the inability to decode some secrets.

  This is fixed by always storing secrets in plaintext and decoding
  inconsistently stored data as needed when getting secrets.

  [Test Case]
    * deploy Openstack with Barbican using Vault as a backend
    * openstack volume type create --encryption-provider nova.volume.encryptors.luks.LuksEncryptor --encryption-cipher aes-xts-plain64 --encryption-key-size 256 --encryption-control-location front-end LUKS
    * openstack volume create --size 1 --type LUKS luks_vol1
    * ensure volume created successfully
    * openstack volume show luks_vol1
    * create vm and attach volume
    * mkfs and mount then test can read/write

  
  [Where things could go wrong]
  If things were to go wrong it would probably be in the get_secret() method which calls _ensure_legacy_base64(). _ensure_legacy_base64() assumes that anything that is not a key was stored base64 encoded. Presumably this is correct, but there was a path added to catch a UnicodeDecodeError exception to handle unexpected non-base64-encoded secrets.

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