<?xml version="1.0"?>
<!DOCTYPE modulesynopsis SYSTEM "../style/modulesynopsis.dtd">
<?xml-stylesheet type="text/xsl" href="../style/manual.en.xsl"?>
<!-- $LastChangedRevision$ -->

<!--
 Licensed to the Apache Software Foundation (ASF) under one or more
 contributor license agreements.  See the NOTICE file distributed with
 this work for additional information regarding copyright ownership.
 The ASF licenses this file to You under the Apache License, Version 2.0
 (the "License"); you may not use this file except in compliance with
 the License.  You may obtain a copy of the License at

     http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
-->

<modulesynopsis metafile="mod_authz_dbm.xml.meta">

<name>mod_authz_dbm</name>
<description>Group authorization using DBM files</description>
<status>Extension</status>
<sourcefile>mod_authz_dbm.c</sourcefile>
<identifier>authz_dbm_module</identifier>
<compatibility>Available in Apache 2.1 and later</compatibility>

<summary>
    <p>This module provides authorization capabilities so that
       authenticated users can be allowed or denied access to portions
       of the web site by group membership. Similar functionality is
       provided by <module>mod_authz_groupfile</module>.</p>
</summary>

<seealso><directive module="mod_authz_core">Require</directive></seealso>
<section id="examples">
<title>Example usage</title>
<p><em>Note that using mod_authz_dbm requires you to require <code>dbm-group</code> 
instead of <code>group</code>:</em>
</p>
<highlight language="config">
&lt;Directory "/foo/bar"&gt;
  AuthType Basic 
  AuthName "Secure Area"
  AuthBasicProvider dbm 
  AuthDBMUserFile site/data/users 
  AuthDBMGroupFile site/data/users 
  Require dbm-group admin 
&lt;/Directory&gt;
</highlight>
</section>
<directivesynopsis>
<name>AuthDBMGroupFile</name>
<description>Sets the name of the database file containing the list
of user groups for authorization</description>
<syntax>AuthDBMGroupFile <var>file-path</var></syntax>
<contextlist><context>directory</context><context>.htaccess</context>
</contextlist>
<override>AuthConfig</override>

<usage>
    <p>The <directive>AuthDBMGroupFile</directive> directive sets the
    name of a DBM file containing the list of user groups for user
    authorization.  <var>File-path</var> is the absolute path to the
    group file.</p>

    <p>The group file is keyed on the username. The value for a
    user is a comma-separated list of the groups to which the users
    belongs. There must be no whitespace within the value, and it
    must never contain any colons.</p>

    <note type="warning"><title>Security</title>
      <p>Make sure that the <directive>AuthDBMGroupFile</directive> is
      stored outside the document tree of the web-server. Do
      <strong>not</strong> put it in the directory that it protects.
      Otherwise, clients will be able to download the
      <directive>AuthDBMGroupFile</directive> unless otherwise
      protected.</p>
    </note>

    <p>Combining Group and Password DBM files: In some cases it is
    easier to manage a single database which contains both the
    password and group details for each user. This simplifies any
    support programs that need to be written: they now only have to
    deal with writing to and locking a single DBM file. This can be
    accomplished by first setting the group and password files to
    point to the same DBM:</p>

    <highlight language="config">
AuthDBMGroupFile /www/userbase
AuthDBMUserFile /www/userbase
    </highlight>

    <p>The key for the single DBM is the username. The value consists
    of</p>

    <example>
      Encrypted Password : List of Groups [ : (ignored) ]
    </example>

    <p>The password section contains the encrypted
    password as before. This is followed by a colon and the comma
    separated list of groups. Other data may optionally be left in the
    DBM file after another colon; it is ignored by the authorization
    module. This is what www.telescope.org uses for its combined
    password and group database.</p>
</usage>
</directivesynopsis>

<directivesynopsis>
<name>AuthzDBMType</name>
<description>Sets the type of database file that is used to
store list of user groups</description>
<syntax>AuthzDBMType default|SDBM|GDBM|NDBM|DB</syntax>
<default>AuthzDBMType default</default>
<contextlist><context>directory</context><context>.htaccess</context>
</contextlist>
<override>AuthConfig</override>

<usage>
    <p>Sets the type of database file that is used to store the list
    of user groups.
    The default database type is determined at compile time.  The
    availability of other types of database files also depends on
    <a href="../install.html#dbm">compile-time settings</a>.</p>

    <p>It is crucial that whatever program you use to create your group
    files is configured to use the same type of database.</p>
</usage>
</directivesynopsis>

</modulesynopsis>
