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+<a href="http://www.apache.org/">Apache</a> &gt; <a href="http://httpd.apache.org/">HTTP Server</a> &gt; <a href="http://httpd.apache.org/docs/">Documentation</a> &gt; <a href="../">Version 2.4</a> &gt; <a href="./">Modules</a></div>
+<div id="page-content">
+<div id="preamble"><h1>Apache Module mod_authn_dbm</h1>
+<div class="toplang">
+<p><span>Available Languages: </span><a href="../en/mod/mod_authn_dbm.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/mod/mod_authn_dbm.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
+<a href="../ja/mod/mod_authn_dbm.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a> |
+<a href="../ko/mod/mod_authn_dbm.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a></p>
+</div>
+<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>User authentication using DBM files</td></tr>
+<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>authn_dbm_module</td></tr>
+<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_authn_dbm.c</td></tr>
+<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.1 and later</td></tr></table>
+<h3>Summary</h3>
+
+ <p>This module provides authentication front-ends such as
+ <code class="module"><a href="../mod/mod_auth_digest.html">mod_auth_digest</a></code> and <code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code>
+ to authenticate users by looking up users in <dfn>dbm</dfn> password
+ files. Similar functionality is provided by
+ <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code>.</p>
+
+ <p>When using <code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code> or
+ <code class="module"><a href="../mod/mod_auth_digest.html">mod_auth_digest</a></code>, this module is invoked via the
+ <code class="directive"><a href="../mod/mod_auth_basic.html#authbasicprovider">AuthBasicProvider</a></code> or
+ <code class="directive"><a href="../mod/mod_auth_digest.html#authdigestprovider">AuthDigestProvider</a></code>
+ with the <code>dbm</code> value.</p>
+</div>
+<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><h3 class="directives">Directives</h3>
+<ul id="toc">
+<li><img alt="" src="../images/down.gif" /> <a href="#authdbmtype">AuthDBMType</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#authdbmuserfile">AuthDBMUserFile</a></li>
+</ul>
+<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&amp;list_id=144532&amp;product=Apache%20httpd-2&amp;query_format=specific&amp;order=changeddate%20DESC%2Cpriority%2Cbug_severity&amp;component=mod_authn_dbm">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&amp;component=mod_authn_dbm">Report a bug</a></li></ul><h3>See also</h3>
+<ul class="seealso">
+<li><code class="directive"><a href="../mod/mod_authn_core.html#authname">AuthName</a></code></li>
+<li><code class="directive"><a href="../mod/mod_authn_core.html#authtype">AuthType</a></code></li>
+<li>
+ <code class="directive"><a href="../mod/mod_auth_basic.html#authbasicprovider">AuthBasicProvider</a></code>
+</li>
+<li>
+ <code class="directive"><a href="../mod/mod_auth_digest.html#authdigestprovider">AuthDigestProvider</a></code>
+</li>
+<li><code class="program"><a href="../programs/htpasswd.html">htpasswd</a></code></li>
+<li><code class="program"><a href="../programs/htdbm.html">htdbm</a></code></li>
+<li><a href="../misc/password_encryptions.html">Password Formats</a></li>
+<li><a href="#comments_section">Comments</a></li></ul></div>
+
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="directive-section"><h2><a name="AuthDBMType" id="AuthDBMType">AuthDBMType</a> <a name="authdbmtype" id="authdbmtype">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets the type of database file that is used to
+store passwords</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDBMType default|SDBM|GDBM|NDBM|DB</code></td></tr>
+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthDBMType default</code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
+<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authn_dbm</td></tr>
+</table>
+ <p>Sets the type of database file that is used to store the passwords.
+ The default database type is determined at compile time. The
+ availability of other types of database files also depends on
+ <a href="../programs/configure.html#options">compile-time settings</a>.</p>
+
+ <p>For example, in order to enable the support for Berkeley DB
+ (correspondent to the <code>db</code> type) the
+ <code>--with-berkeley-db</code> option needs to be added to httpd's
+ configure to generate the necessary DSO.</p>
+
+ <p>It is crucial that whatever program you use to create your password
+ files is configured to use the same type of database.</p>
+
+</div>
+<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
+<div class="directive-section"><h2><a name="AuthDBMUserFile" id="AuthDBMUserFile">AuthDBMUserFile</a> <a name="authdbmuserfile" id="authdbmuserfile">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets the name of a database file containing the list of users and
+passwords for authentication</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDBMUserFile <var>file-path</var></code></td></tr>
+<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
+<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
+<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authn_dbm</td></tr>
+</table>
+ <p>The <code class="directive">AuthDBMUserFile</code> directive sets the
+ name of a DBM file containing the list of users and passwords for
+ user authentication. <var>File-path</var> is the absolute path to
+ the user file.</p>
+
+ <p>The user file is keyed on the username. The value for a user is
+ the encrypted password, optionally followed by a colon and arbitrary
+ data. The colon and the data following it will be ignored by the
+ server.</p>
+
+ <div class="warning"><h3>Security:</h3>
+ <p>Make sure that the <code class="directive">AuthDBMUserFile</code> is stored
+ outside the document tree of the web-server; do <em>not</em> put it in
+ the directory that it protects. Otherwise, clients will be able to
+ download the <code class="directive">AuthDBMUserFile</code>.</p>
+ </div>
+
+ <p>The encrypted password format depends on which authentication
+ frontend (e.g. <code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code> or
+ <code class="module"><a href="../mod/mod_auth_digest.html">mod_auth_digest</a></code>) is being used. See <a href="../misc/password_encryptions.html">Password Formats</a> for
+ more information.</p>
+
+ <p>Important compatibility note: The implementation of
+ <code>dbmopen</code> in the Apache modules reads the string length of
+ the hashed values from the DBM data structures, rather than relying
+ upon the string being NULL-appended. Some applications, such as
+ the Netscape web server, rely upon the string being
+ NULL-appended, so if you are having trouble using DBM files
+ interchangeably between applications this may be a part of the
+ problem.</p>
+
+ <p>A perl script called
+ <code class="program"><a href="../programs/dbmmanage.html">dbmmanage</a></code> is included with
+ Apache. This program can be used to create and update DBM
+ format password files for use with this module. Another
+ tool for maintaining the DBM files is the included program
+ <code class="program"><a href="../programs/htdbm.html">htdbm</a></code>.</p>
+
+</div>
+</div>
+<div class="bottomlang">
+<p><span>Available Languages: </span><a href="../en/mod/mod_authn_dbm.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/mod/mod_authn_dbm.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
+<a href="../ja/mod/mod_authn_dbm.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a> |
+<a href="../ko/mod/mod_authn_dbm.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a></p>
+</div><div class="top"><a href="#page-header"><img src="../images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&amp;A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Libera.chat, or sent to our <a href="https://httpd.apache.org/lists.html">mailing lists</a>.</div>
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