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178 lines
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head>
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<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" />
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<title>mod_authn_dbm - Apache HTTP Server Version 2.5</title>
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<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
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<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" />
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</script>
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<link href="../images/favicon.ico" rel="shortcut icon" /></head>
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<body>
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<div id="page-header">
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<p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/quickreference.html">Directives</a> | <a href="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p>
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<p class="apache">Apache HTTP Server Version 2.5</p>
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<img alt="" src="../images/feather.png" /></div>
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<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
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<div id="path">
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<a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.5</a> > <a href="./">Modules</a></div>
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<div id="page-content">
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<div id="preamble"><h1>Apache Module mod_authn_dbm</h1>
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<div class="toplang">
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<p><span>Available Languages: </span><a href="../en/mod/mod_authn_dbm.html" title="English"> en </a> |
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<a href="../fr/mod/mod_authn_dbm.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
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<a href="../ja/mod/mod_authn_dbm.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
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<a href="../ko/mod/mod_authn_dbm.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
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</div>
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<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>User authentication using DBM files</td></tr>
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<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>authn_dbm_module</td></tr>
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<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_authn_dbm.c</td></tr></table>
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<h3>Summary</h3>
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<p>This module provides authentication front-ends such as
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<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>
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to authenticate users by looking up users in <dfn>dbm</dfn> password
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files. Similar functionality is provided by
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<code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code>.</p>
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<p>When using <code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code> or
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<code class="module"><a href="../mod/mod_auth_digest.html">mod_auth_digest</a></code>, this module is invoked via the
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<code class="directive"><a href="../mod/mod_auth_basic.html#authbasicprovider">AuthBasicProvider</a></code> or
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<code class="directive"><a href="../mod/mod_auth_digest.html#authdigestprovider">AuthDigestProvider</a></code>
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with the <code>dbm</code> value.</p>
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</div>
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<div id="quickview"><h3 class="directives">Directives</h3>
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<ul id="toc">
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<li><img alt="" src="../images/down.gif" /> <a href="#authdbmtype">AuthDBMType</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#authdbmuserfile">AuthDBMUserFile</a></li>
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</ul>
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<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__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_authn_dbm">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_authn_dbm">Report a bug</a></li></ul><h3>See also</h3>
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<ul class="seealso">
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<li><code class="directive"><a href="../mod/mod_authn_core.html#authname">AuthName</a></code></li>
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<li><code class="directive"><a href="../mod/mod_authn_core.html#authtype">AuthType</a></code></li>
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<li>
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<code class="directive"><a href="../mod/mod_auth_basic.html#authbasicprovider">AuthBasicProvider</a></code>
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</li>
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<li>
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<code class="directive"><a href="../mod/mod_auth_digest.html#authdigestprovider">AuthDigestProvider</a></code>
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</li>
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<li><code class="program"><a href="../programs/htpasswd.html">htpasswd</a></code></li>
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<li><code class="program"><a href="../programs/htdbm.html">htdbm</a></code></li>
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<li><a href="../misc/password_encryptions.html">Password Formats</a></li>
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<li><a href="#comments_section">Comments</a></li></ul></div>
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="AuthDBMType" id="AuthDBMType">AuthDBMType</a> <a name="authdbmtype" id="authdbmtype">Directive</a> <a title="Permanent link" href="#authdbmtype" class="permalink">¶</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets the type of database file that is used to
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store passwords</td></tr>
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDBMType default|SDBM|GDBM|NDBM|DB</code></td></tr>
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<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthDBMType default</code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
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<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authn_dbm</td></tr>
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</table>
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<p>Sets the type of database file that is used to store the passwords.
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The default database type is determined at compile time. The
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availability of other types of database files also depends on
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<a href="../programs/configure.html#options">compile-time settings</a>.</p>
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<p>For example, in order to enable the support for Berkeley DB
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(correspondent to the <code>db</code> type) the
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<code>--with-berkeley-db</code> option needs to be added to httpd's
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configure to generate the necessary DSO.</p>
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<p>It is crucial that whatever program you use to create your password
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files is configured to use the same type of database.</p>
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</div>
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="AuthDBMUserFile" id="AuthDBMUserFile">AuthDBMUserFile</a> <a name="authdbmuserfile" id="authdbmuserfile">Directive</a> <a title="Permanent link" href="#authdbmuserfile" class="permalink">¶</a></h2>
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<table class="directive">
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<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
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passwords for authentication</td></tr>
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDBMUserFile <var>file-path</var></code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
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<tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authn_dbm</td></tr>
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</table>
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<p>The <code class="directive">AuthDBMUserFile</code> directive sets the
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name of a DBM file containing the list of users and passwords for
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user authentication. <var>File-path</var> is the absolute path to
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the user file.</p>
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<p>The user file is keyed on the username. The value for a user is
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the encrypted password, optionally followed by a colon and arbitrary
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data. The colon and the data following it will be ignored by the
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server.</p>
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<div class="warning"><h3>Security:</h3>
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<p>Make sure that the <code class="directive">AuthDBMUserFile</code> is stored
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outside the document tree of the web-server; do <em>not</em> put it in
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the directory that it protects. Otherwise, clients will be able to
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download the <code class="directive">AuthDBMUserFile</code>.</p>
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</div>
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<p>The encrypted password format depends on which authentication
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frontend (e.g. <code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code> or
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<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
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more information.</p>
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<p>Important compatibility note: The implementation of
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<code>dbmopen</code> in the Apache modules reads the string length of
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the hashed values from the DBM data structures, rather than relying
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upon the string being NULL-appended. Some applications, such as
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the Netscape web server, rely upon the string being
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NULL-appended, so if you are having trouble using DBM files
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interchangeably between applications this may be a part of the
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problem.</p>
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<p>A perl script called
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<code class="program"><a href="../programs/dbmmanage.html">dbmmanage</a></code> is included with
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Apache. This program can be used to create and update DBM
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format password files for use with this module. Another
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tool for maintaining the DBM files is the included program
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<code class="program"><a href="../programs/htdbm.html">htdbm</a></code>.</p>
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</div>
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</div>
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<div class="bottomlang">
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<p><span>Available Languages: </span><a href="../en/mod/mod_authn_dbm.html" title="English"> en </a> |
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<a href="../fr/mod/mod_authn_dbm.html" hreflang="fr" rel="alternate" title="Français"> fr </a> |
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<a href="../ja/mod/mod_authn_dbm.html" hreflang="ja" rel="alternate" title="Japanese"> ja </a> |
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<a href="../ko/mod/mod_authn_dbm.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
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</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&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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