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[Corey Bryant <corey.bryant@xxxxxxxxxxxxx>]

This bug was fixed in the package keystone - 2:13.0.2-0ubuntu3~cloud0
---------------

 keystone (2:13.0.2-0ubuntu3~cloud0) xenial-queens; urgency=medium
 .
   * New update for the Ubuntu Cloud Archive.
 .
 keystone (2:13.0.2-0ubuntu3) bionic; urgency=medium
 .
   * d/p/0002-fixing-dn-to-id.patch: Dropped. This patch shouldn't have
     been backported to stable/queens (LP: #1850634).


** Changed in: cloud-archive/queens
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1850634

Title:
  queens regresion: _dn_to_id() not using utf8_encode/decode

Status in Ubuntu Cloud Archive:
  Invalid
Status in Ubuntu Cloud Archive queens series:
  Fix Released
Status in OpenStack Identity (keystone):
  Triaged
Status in keystone package in Ubuntu:
  Invalid
Status in keystone source package in Bionic:
  Fix Released

Bug description:
  [Impact]

  There's a regression in the LDAP common backend code due to a recent
  stable/queens backport that shouldn't have been backported past
  stable/rocky. It was backported as part of the fixes for
  https://bugs.launchpad.net/bugs/1782922.

  The following patch shouldn't have been backported to stable/queens:
  https://review.opendev.org/#/c/672519/

  The reason why is because the following patch, which switched to bytes_mode=False, doesn't exist in stable/queens:
  https://review.opendev.org/#/c/613648/
  In particular see the changes to _dn_to_id() in https://review.opendev.org/#/c/613648/4/keystone/identity/backends/ldap/common.py.

  Those changes didn't happen in stable/queens so _dn_to_id should still
  be UTF-8 encoding/decoding the appropriate fields. In other words it
  should still be using the following in stable/queens:

          if self.id_attr == utf8_decode(
                  ldap.dn.str2dn(utf8_encode(dn))[0][0][0].lower()):
              return utf8_decode(ldap.dn.str2dn(utf8_encode(dn))[0][0][1])

  [Test Case]
  See test case in https://bugs.launchpad.net/bugs/1782922.

  [Regression Potential]
  The code that will be fixed for this bug (ie. the code in the if statement) is being reverted to what it used to be prior to the bug fix for https://bugs.launchpad.net/bugs/1782922. Prior to 1782922, _dn_to_id() used to only consist of the code that is in the if statment, so the regression potential is very low. Code will be tested to minimize regression potential and patch has been submitted upstream.

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