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<title>mod_authn_dbd - Apache HTTP Server</title>
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<div id="preamble"><h1>Apache Module mod_authn_dbd</h1>
<div class="toplang">
<p><span>Available Languages: </span><a href="../en/mod/mod_authn_dbd.html" title="English"> en </a></p>
</div>
<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>User authentication using an SQL database</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_dbd_module</td></tr>
<tr><th><a href="module-dict.html#SourceFile">Source�File:</a></th><td>mod_authn_dbd.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 SQL tables.
Similar functionality is provided by, for example,
<code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code>.</p>
<p>This module relies on <code class="module"><a href="../mod/mod_dbd.html">mod_dbd</a></code> to specify
the backend database driver and connection parameters, and
manage the database connections.</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>dbd</code> value.</p>
</div>
<div id="quickview"><h3 class="directives">Directives</h3>
<ul id="toc">
<li><img src="../images/down.gif" alt="" /> <a href="#authdbduserpwquery">AuthDBDUserPWQuery</a></li>
<li><img src="../images/down.gif" alt="" /> <a href="#authdbduserrealmquery">AuthDBDUserRealmQuery</a></li>
</ul>
<h3>See also</h3>
<ul class="seealso">
<li><code class="directive"><a href="../mod/core.html#authname">AuthName</a></code></li>
<li><code class="directive"><a href="../mod/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="directive"><a href="../mod/mod_dbd.html#dbdriver">DBDriver</a></code></li>
<li><code class="directive"><a href="../mod/mod_dbd.html#dbdparams">DBDParams</a></code></li>
</ul></div>
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<div class="directive-section"><h2><a id="AuthDBDUserPWQuery" name="AuthDBDUserPWQuery">AuthDBDUserPWQuery</a> <a id="authdbduserpwquery" name="authdbduserpwquery">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>SQL query to look up a password for a user</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDBDUserPWQuery <var>query</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_dbd</td></tr>
</table>
<p>The <code class="directive">AuthDBDUserPWQuery</code> specifies an
SQL query to look up a password for a specified user.
The query must take a single string (typically SQL varchar)
argument (username), and return a single value (encrypted password).
</p>
<div class="example"><p><code>
AuthDBDUserPWQuery "SELECT password FROM authn WHERE username = %s"
</code></p></div>
</div>
<div class="top"><a href="#page-header"><img src="../images/up.gif" alt="top" /></a></div>
<div class="directive-section"><h2><a id="AuthDBDUserRealmQuery" name="AuthDBDUserRealmQuery">AuthDBDUserRealmQuery</a> <a id="authdbduserrealmquery" name="authdbduserrealmquery">Directive</a></h2>
<table class="directive">
<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>SQL query to look up a password hash for a user and realm.
</td></tr>
<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDBDUserRealmQuery <var>query</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_dbd</td></tr>
</table>
<p>The <code class="directive">AuthDBDUserRealmPWQuery</code> specifies an
SQL query to look up a password for a specified user and realm.
The query must take two string (typically SQL varchar) arguments
(username and realm), and return a single value (encrypted password).
</p>
<div class="example"><p><code>
AuthDBDUserRealmPWQuery "SELECT password FROM authn
WHERE username = %s AND realm = %s"
</code></p></div>
</div>
</div>
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<p><span>Available Languages: </span><a href="../en/mod/mod_authn_dbd.html" title="English"> en </a></p>
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