[QA] Exposed User Attributes must be written all lower case

[jnweiger]

Seen in user_ldap-0.19.0 with windows_network_drive 2.4.0 and core 10.13.0

• The ldap schema has:

  ldapsearch -x -H ldap://$ldapserver -b dc=owncloud,dc=com -D "$admin_dn" -w "$admin_pass" '(uid=lemming0123)'
  ...
  uidNumber: 20123
  gidNumber: 30000
  homeDirectory: alice
  ownCloudUUID: 8ce67d3a-3079-4755-a7df-6ef77ac2b8c8

• in Admin -> Settings -> User Authentication -> Advanced we want to allow the homeDirectory attribute as an Exposed Attribute
  

• in config.php we want to (mis)use the homeDirectory attribute to map the uid lemming0123 to Alice:

  'wnd.kerberos.servers' => [
      'ad01_lem' => [         /* <--- kerberos data id */
          'ockeytab' => '/etc/apache2/oc20230731.keytab',
          'ocservice' => 'HTTP/oc10130a1-kerberos-100rc3-20230801.jw-qa.owncloud.works',
          'usermapping' => ['type' => 'EALdapAttr', 'params' => ['attr' => 'homeDirectory']],
          'ccachettl' => 3600,
      ],

• In Admin -> Storages, we mount a WND drive using the ad01_lem data ID

• (Optionally) patch the error message windows_network_drive/lib/kerberos/usermappings/ealdapattr.php to include more details:

          throw new MappingException('Requested attribute not found or not exposed: ' . $this->attr . " -> " . serialize($eas));

• When user lemming01234 wants to access their lemming-wnd folder, an error occurs:

Expected behavior

• LDAP Attibutes can be spelled as is.
• LDAP Attribute names are case insensitive.

Workaround

• Spell homedirectory in all lower case in Admin -> Settings -> User Authentication -> Advanced -> Exposed Attribute
• Now the error no longer happens.

[jvillafanez]

Fix on the WND side -> https://github.com/owncloud/windows_network_drive/pull/472 . As said in the PR, it's targeting the release branch.

It makes more sense that WND matches whatever LDAP is exposing.

[jnweiger]

Confirmed fixed with https://github.com/owncloud/windows_network_drive/pull/472 -> windows_network_drive-2.4.0-rc.2 Also lower case works. The Attribute name must be written consistently either both upper case or both lower case, in user_ldap advanced settings and windows_network_drive config. OK.