[Bug 2003266] Re: 22.04 package lacks GSSAPI support

[Ian Williams]

A brief update here: I'm testing the new version (0.32.2-1ubuntu0.1) of
the package, and I can confirm that I see the expected GSSAPI strings in
the neon27 binary.

That said, trying to use Kerberos behavior in a neon27 consumer (davfs2)
doesn't seem to be working. I'm not sure if that's a configuration
issue, or if it's a problem with the library. I'm working on figuring
that out now.

(davfs2 logs show that it tries Negotiate auth, then skips to Basic auth
without further logging output, making this more difficult to diagnose.)

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https://bugs.launchpad.net/bugs/2003266

Title:
  22.04 package lacks GSSAPI support

Status in neon27 package in Ubuntu:
  Fix Released
Status in neon27 source package in Jammy:
  Fix Committed

Bug description:
  [ Impact ]

   * GSSAPI was disabled by accident as a side-effect of packaging a new release.
     Upstream renamed the environment variable used to setup the feature and the
     flag was not updated in d/rules.

   * Users get caught off-guard when updating from 20.04 to 22.04, 24.04 is not
     affected.

  [ Test Plan ]

   * Did not test the binary, confirmed the fix is effective by analyzing the
     build logs.

   * I've confirmed that the issue
     is solved by checking for the presence of the following string in the build
     logs:
        checking for krb5-config... /usr/bin/krb5-config.mit
     Whereas a build with the issue will instead output:
        checking for krb5-config... none

   * I believe the fix is non-intrusive enough that no further testing
  is needed.

  [ Where problems could occur ]

   * Enabling a new feature could have a side effect of disabling another
     mutually-exclusive feature, but I did not identify any.

   * Enabling a new feature could break a different feature which changes its
     behavior when this new feature is present, I also did not identify any such
     case.

  [ Other Info ]

   * Upstream bug reports:
     - https://github.com/notroj/neon/issues/102
     - https://github.com/notroj/neon/issues/52
   * Upstream breaking change:
     - https://github.com/notroj/neon/commit/b9b7425de38b35249e689c03c30c8fd8adfae806
   * Upstream change to avoid this from happening again:
     - https://github.com/notroj/neon/commit/4fdcff4a0ccbb0924f7dabcf8d213452aa33ab82
   * Launchpad bug:
     - https://bugs.launchpad.net/ubuntu/+source/neon27/+bug/2003266

  [ Original description ]

  For more information, please see
  https://github.com/notroj/neon/issues/102.

  The 22.04 built package of neon lacks GSSAPI support, whereas previous
  versions (e.g. 18.04) had this support built-in. This appears to be
  due to a recent-ish change in the build logic for neon, which changes
  when GSSAPI is compiled in to the library
  (https://github.com/notroj/neon/commit/b9b7425de38b35249e689c03c30c8fd8adfae806)

  We were able to get a work around building from source with the
  following envvar during build-time:
  KRB5_CONF_TOOL=/usr/bin/krb5-config.mit ./configure. TL;DR:
  KRB5_CONFIG became KRB5_CONF_TOOL.

  Version information:

  $ lsb_release -rd
  Description:	Ubuntu 22.04.1 LTS
  Release:	22.04

  $ apt show libneon27
  Package: libneon27
  Version: 0.32.2-1
  Priority: optional
  Section: universe/libs
  Source: neon27
  Origin: Ubuntu
  Maintainer: Ubuntu Developers <ubuntu-devel-discuss at lists.ubuntu.com>
  Original-Maintainer: Laszlo Boszormenyi (GCS) <gcs at debian.org>
  Bugs: https://bugs.launchpad.net/ubuntu/+filebug
  Installed-Size: 233 kB
  Depends: libc6 (>= 2.33), libssl3 (>= 3.0.0~~alpha1), libxml2 (>= 2.7.4), zlib1g (>= 1:1.1.4)
  Homepage: https://notroj.github.io/neon/
  Download-Size: 102 kB
  APT-Manual-Installed: no
  APT-Sources: [corporate Launchpad mirror]
  Description: HTTP and WebDAV client library

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