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   8 <title>mod_authz_dbm - Apache HTTP Server</title>
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  16 <p class="apache">Apache HTTP Server Version 2.3</p>
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  21 <div id="page-content">
  22 <div id="preamble"><h1>Apache Module mod_authz_dbm</h1>
  23 <div class="toplang">
  24 <p><span>Available Languages: </span><a href="../en/mod/mod_authz_dbm.html" title="English">&nbsp;en&nbsp;</a> |
  25 <a href="../ko/mod/mod_authz_dbm.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a> |
  26 <a href="../zh-cn/mod/mod_authz_dbm.html" hreflang="zh-cn" rel="alternate" title="Simplified Chinese">&nbsp;zh-cn&nbsp;</a></p>
  27 </div>
  28 <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Group authorization using DBM files</td></tr>
  29 <tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
  30 <tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>authz_dbm_module</td></tr>
  31 <tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_authz_dbm.c</td></tr>
  32 <tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.1 and later</td></tr></table>
  33 <h3>Summary</h3>
  34
  35     <p>This module provides authorization capabilities so that
  36        authenticated users can be allowed or denied access to portions
  37        of the web site by group membership. Similar functionality is
  38        provided by <code class="module"><a href="../mod/mod_authz_groupfile.html">mod_authz_groupfile</a></code>.</p>
  39 </div>
  40 <div id="quickview"><h3 class="directives">Directives</h3>
  41 <ul id="toc">
  42 <li><img alt="" src="../images/down.gif" /> <a href="#authdbmgroupfile">AuthDBMGroupFile</a></li>
  43 <li><img alt="" src="../images/down.gif" /> <a href="#authzdbmtype">AuthzDBMType</a></li>
  44 </ul>
  45 <h3>See also</h3>
  46 <ul class="seealso">
  47 <li><code class="directive"><a href="../mod/mod_authz_core.html#require">Require</a></code></li>
  48 </ul></div>
  49
  50 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  51 <div class="directive-section"><h2><a name="AuthDBMGroupFile" id="AuthDBMGroupFile">AuthDBMGroupFile</a> <a name="authdbmgroupfile" id="authdbmgroupfile">Directive</a></h2>
  52 <table class="directive">
  53 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets the name of the database file containing the list
  54 of user groups for authorization</td></tr>
  55 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDBMGroupFile <var>file-path</var></code></td></tr>
  56 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
  57 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
  58 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
  59 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authz_dbm</td></tr>
  60 </table>
  61     <p>The <code class="directive">AuthDBMGroupFile</code> directive sets the
  62     name of a DBM file containing the list of user groups for user
  63     authorization.  <var>File-path</var> is the absolute path to the
  64     group file.</p>
  65
  66     <p>The group file is keyed on the username. The value for a
  67     user is a comma-separated list of the groups to which the users
  68     belongs. There must be no whitespace within the value, and it
  69     must never contain any colons.</p>
  70
  71     <div class="warning"><h3>Security</h3>
  72       <p>Make sure that the <code class="directive">AuthDBMGroupFile</code> is
  73       stored outside the document tree of the web-server. Do
  74       <strong>not</strong> put it in the directory that it protects.
  75       Otherwise, clients will be able to download the
  76       <code class="directive">AuthDBMGroupFile</code> unless otherwise
  77       protected.</p>
  78     </div>
  79
  80     <p>Combining Group and Password DBM files: In some cases it is
  81     easier to manage a single database which contains both the
  82     password and group details for each user. This simplifies any
  83     support programs that need to be written: they now only have to
  84     deal with writing to and locking a single DBM file. This can be
  85     accomplished by first setting the group and password files to
  86     point to the same DBM:</p>
  87
  88     <div class="example"><p><code>
  89       AuthDBMGroupFile /www/userbase<br />
  90       AuthDBMUserFile /www/userbase
  91     </code></p></div>
  92
  93     <p>The key for the single DBM is the username. The value consists
  94     of</p>
  95
  96     <div class="example"><p><code>
  97       Encrypted Password : List of Groups [ : (ignored) ]
  98     </code></p></div>
  99
 100     <p>The password section contains the encrypted
 101     password as before. This is followed by a colon and the comma
 102     separated list of groups. Other data may optionally be left in the
 103     DBM file after another colon; it is ignored by the authorization
 104     module. This is what www.telescope.org uses for its combined
 105     password and group database.</p>
 106
 107 </div>
 108 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
 109 <div class="directive-section"><h2><a name="AuthzDBMType" id="AuthzDBMType">AuthzDBMType</a> <a name="authzdbmtype" id="authzdbmtype">Directive</a></h2>
 110 <table class="directive">
 111 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets the type of database file that is used to
 112 store list of user groups</td></tr>
 113 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthzDBMType default|SDBM|GDBM|NDBM|DB</code></td></tr>
 114 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthzDBMType default</code></td></tr>
 115 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
 116 <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
 117 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
 118 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authz_dbm</td></tr>
 119 </table>
 120     <p>Sets the type of database file that is used to store the list
 121     of user groups.
 122     The default database type is determined at compile time.  The
 123     availability of other types of database files also depends on
 124     <a href="../install.html#dbm">compile-time settings</a>.</p>
 125
 126     <p>It is crucial that whatever program you use to create your group
 127     files is configured to use the same type of database.</p>
 128
 129 </div>
 130 </div>
 131 <div class="bottomlang">
 132 <p><span>Available Languages: </span><a href="../en/mod/mod_authz_dbm.html" title="English">&nbsp;en&nbsp;</a> |
 133 <a href="../ko/mod/mod_authz_dbm.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a> |
 134 <a href="../zh-cn/mod/mod_authz_dbm.html" hreflang="zh-cn" rel="alternate" title="Simplified Chinese">&nbsp;zh-cn&nbsp;</a></p>
 135 </div><div id="footer">
 136 <p class="apache">Copyright 2011 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
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