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  1. Guacamole
  2. GUACAMOLE-1462

German umlauts in LDAP user search filter do not work

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Details

    • Bug
    • Status: Open
    • Major
    • Resolution: Unresolved
    • None
    • None
    • guacamole-auth-ldap
    • None
    • Docker, MacOS

    Description

      I need to use German umlauts within the ldap-user-search-filter keyword, like

       

      ldap-user-search-filter: (&(objectClass=person)(memberOf=CN=mem,OU=1234 - Universität,DC=ad,DC=example,DC=org))
      

      But Guacamole seems not be able to generate a correct LDAP query and so the query does not return anything. Testing the same query with Apache Directory Studio (that uses the same LDAP code?) works.

      The trace/debug output looks something like

       TRACE o.a.g.auth.ldap.ObjectQueryService - Sending LDAP filter: "(&(&(objectClass=person)(memberOf=\43\4E\3D\6D\65\6D\2C\4F\55\3D\31\32\33\34\20\2D\20\55\6E\69\76\65\72\73\69\74\C3\83\C2\A4\74\2C\44\43\3D\61\64\2C\44\43\3D\65\78\61\6D\70\6C\65\2C\44\43\3D\6F\72\67))(|(sAMAccountName=testuser)))

      The attributeValue of memberOf is somehow converted to (ascii) hexcode. The german umlaut ä is converted to \c3\a4 (utf hex). Is this intended behaviour?

       

      For testing I used a docker compose project that uses the official Guacamole Client and Server Docker images. LDAP server is MS Active Directory.

      I made sure Java/Tomcat uses UTF-8 with environment variable JAVA_TOOL_OPTIONS: "-Dfile.encoding=UTF-8 -Dsun.jnu.encoding=UTF-8". But that did not change behaviour.

      I also checked the generated guacamole.properties which is valid utf8.

       

      I also tried some escaped variations of the umlaut in the attributeValue in guacamole.properties without luck.

      I suspect there is something wrong with the string handling of the LDAP parser.

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            Unassigned Unassigned
            schlady Jens Schleede
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            Dates

              Created:
              Updated: