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--><title>mod_auth_digest- Apache HTTP Server</title><link href="/style/manual.css" type="text/css" rel="stylesheet"/></head><body><blockquote><div align="center"><img src="/images/sub.gif" alt="[APACHE DOCUMENTATION]"/><h3>Apache HTTP Server Version 2.0</h3></div><h1 align="center">Apache Module mod_auth_digest</h1><table cellspacing="1" cellpadding="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td nowrap="nowrap" valign="top"><span class="help">Description:</span></td><td>User authentication using MD5
Digest Authentication.</td></tr><tr><td nowrap="nowrap"><a href="module-dict.html#Status" class="help">Status:</a></td><td>Experimental</td></tr><tr><td nowrap="nowrap"><a href="module-dict.html#ModuleIdentifier" class="help">Module Identifier:</a></td><td>auth_digest_module</td></tr></table></td></tr></table><h2>Summary</h2>
<p>This module implements HTTP Digest Authentication. However, it
has not been extensively tested and is therefore marked
experimental.</p>
<h2>Directives</h2><ul><li><a href="#authdigestalgorithm">AuthDigestAlgorithm</a></li><li><a href="#authdigestdomain">AuthDigestDomain</a></li><li><a href="#authdigestfile">AuthDigestFile</a></li><li><a href="#authdigestgroupfile">AuthDigestGroupFile</a></li><li><a href="#authdigestnccheck">AuthDigestNcCheck</a></li><li><a href="#authdigestnonceformat">AuthDigestNonceFormat</a></li><li><a href="#authdigestnoncelifetime">AuthDigestNonceLifetime</a></li><li><a href="#authdigestqop">AuthDigestQop</a></li></ul><p><strong>See also </strong></p><ul><li><a href="core.html#authname" class="directive"><code class="directive">AuthName</code></a></li><li><a href="core.html#authtype" class="directive"><code class="directive">AuthType</code></a></li><li><a href="core.html#require" class="directive"><code class="directive">Require</code></a></li><li><a href="core.html#satisfy" class="directive"><code class="directive">Satisfy</code></a></li></ul><h2>Using Digest Authentication</h2>
<p>Using MD5 Digest authentication is very simple. Simply set
up authentication normally, using "AuthType Digest" and
"AuthDigestFile" instead of the normal "AuthType Basic" and
"AuthUserFile"; also, replace any "AuthGroupFile" with
"AuthDigestGroupFile". Then add a "AuthDigestDomain" directive
containing at least the root URI(s) for this protection space.
Example:</p>
<blockquote><table cellpadding="10"><tr><td bgcolor="#eeeeee"><code>
<Location /private/><br>
AuthType Digest<br>
AuthName "private area"<br>
AuthDigestDomain /private/ http://mirror.my.dom/private2/<br>
Require valid-user<br>
</Location>
</code></td></tr></table></blockquote>
<blockquote><table><tr><td bgcolor="#e0e5f5"><p align="center"><strong>Note</strong></p>
<p>Digest authentication provides a more secure password system
than Basic authentication, but only works with supporting
browsers. As of July 2002, the major browsers that support digest
authentication are <a href="http://www.opera.com/">Opera</a>, <a href="http://www.microsoft.com/windows/ie/">MS Internet
Explorer</a> (fails when used with a query string), <a href="http://www.w3.org/Amaya/">Amaya</a> and <a href="http://www.mozilla.org">Mozilla</a>. Since digest
authentication is not as widely implemented as basic
authentication, you should use it only in controlled settings.</p>
</td></tr></table></blockquote>
<hr/><h2><a name="AuthDigestAlgorithm">AuthDigestAlgorithm</a> <a name="authdigestalgorithm">Directive</a></h2><table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td nowrap="nowrap"><strong>Description: </strong></td><td>Selects the algorithm used to calculate the challenge and
response hases in digest authentication</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>AuthDigestAlgorithm MD5|MD5-sess</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>AuthDigestAlgorithm MD5</code></td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Context" class="help">Context:</a></td><td>directory, .htaccess</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Override" class="help">Override:</a></td><td>AuthConfig</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Status" class="help">Status:</a></td><td>Experimental</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Module" class="help">Module:</a></td><td>mod_auth_digest</td></tr></table></td></tr></table>
<p>The <code class="directive">AuthDigestAlgorithm</code> directive
selects the algorithm used to calculate the challenge and response
hashes.</p>
<p><strong><em>MD5-sess</em> is not correctly implemented
yet</strong>.
</p>
<hr/><h2><a name="AuthDigestDomain">AuthDigestDomain</a> <a name="authdigestdomain">Directive</a></h2><table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td nowrap="nowrap"><strong>Description: </strong></td><td>URIs that are in the same protection space for digest
authentication</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>AuthDigestDomain <em>URI</em> [<em>URI</em>] ...</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Context" class="help">Context:</a></td><td>directory, .htaccess</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Override" class="help">Override:</a></td><td>AuthConfig</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Status" class="help">Status:</a></td><td>Experimental</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Module" class="help">Module:</a></td><td>mod_auth_digest</td></tr></table></td></tr></table>
<p>The <code class="directive">AuthDigestDomain</code> directive allows
you to specify one or more URIs which are in the same protection
specified URIs are prefixes, i.e. the client will assume that all
URIs "below" these are also protected by the same
(i.e. inluding a scheme, host, port, etc) or relative URIs.</p>
<p>This directive <em>should</em> always be specified and
contain at least the (set of) root URI(s) for this space.
Omitting to do so will cause the client to send the
Authorization header for <em>every request</em> sent to this
server. Apart from increasing the size of the request, it may
also have a detrimental effect on performance if
"AuthDigestNcCheck" is on.</p>
<p>The URIs specified can also point to different servers, in
which case clients (which understand this) will then share
prompting the user each time. </p>
<hr/><h2><a name="AuthDigestFile">AuthDigestFile</a> <a name="authdigestfile">Directive</a></h2><table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td nowrap="nowrap"><strong>Description: </strong></td><td>Location of the text file containing the list
of users and encoded passwords for digest authentication</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>AuthDigestFile <em>file-path</em></td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Context" class="help">Context:</a></td><td>directory, .htaccess</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Override" class="help">Override:</a></td><td>AuthConfig</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Status" class="help">Status:</a></td><td>Experimental</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Module" class="help">Module:</a></td><td>mod_auth_digest</td></tr></table></td></tr></table>
<p>The <code class="directive">AuthDigestFile</code> directive sets the
name of a textual file containing the list of users and encoded
passwords for digest authentication. <em>File-path</em> is the
absolute path to the user file.</p>
<p>The digest file uses a special format. Files in this format
the support/ subdirectory of the Apache distribution.</p>
<hr/><h2><a name="AuthDigestGroupFile">AuthDigestGroupFile</a> <a name="authdigestgroupfile">Directive</a></h2><table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td nowrap="nowrap"><strong>Description: </strong></td><td>Name of the text file containing the list of groups
for digest authentication</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>AuthDigestGroupFile <em>file-path</em></td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Context" class="help">Context:</a></td><td>directory, .htaccess</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Override" class="help">Override:</a></td><td>AuthConfig</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Status" class="help">Status:</a></td><td>Experimental</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Module" class="help">Module:</a></td><td>mod_auth_digest</td></tr></table></td></tr></table>
<p>The <code class="directive">AuthDigestGroupFile</code> directive sets
the name of a textual file containing the list of groups and their
members (user names). <em>File-path</em> is the absolute path to
the group file.</p>
<p>Each line of the group file contains a groupname followed by
a colon, followed by the member usernames separated by spaces.
Example:</p>
<blockquote><table cellpadding="10"><tr><td bgcolor="#eeeeee"><code>mygroup: bob joe anne</code></td></tr></table></blockquote>
<p>Note that searching large text files is <em>very</em>
inefficient.</p>
<p>Security: make sure that the AuthGroupFile 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 AuthGroupFile.</p>
<hr/><h2><a name="AuthDigestNcCheck">AuthDigestNcCheck</a> <a name="authdigestnccheck">Directive</a></h2><table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td nowrap="nowrap"><strong>Description: </strong></td><td>Enables or disables checking of the nonce-count sent by the
server</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>AuthDigestNcCheck On|Off</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>AuthDigestNcCheck Off</code></td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Context" class="help">Context:</a></td><td>server config</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Status" class="help">Status:</a></td><td>Experimental</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Module" class="help">Module:</a></td><td>mod_auth_digest</td></tr></table></td></tr></table>
<p><strong>Not implemented yet.</strong>
</p>
<hr/><h2><a name="AuthDigestNonceFormat">AuthDigestNonceFormat</a> <a name="authdigestnonceformat">Directive</a></h2><table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td nowrap="nowrap"><strong>Description: </strong></td><td>Determines how the nonce is generated</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>???</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>???</code></td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Context" class="help">Context:</a></td><td>directory, .htaccess</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Override" class="help">Override:</a></td><td>AuthConfig</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Status" class="help">Status:</a></td><td>Experimental</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Module" class="help">Module:</a></td><td>mod_auth_digest</td></tr></table></td></tr></table>
<p><strong>Not implemented yet.</strong>
</p>
<hr/><h2><a name="AuthDigestNonceLifetime">AuthDigestNonceLifetime</a> <a name="authdigestnoncelifetime">Directive</a></h2><table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td nowrap="nowrap"><strong>Description: </strong></td><td>How long the server nonce is valid</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>AuthDigestNonceLifetime <em>seconds</em></td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>AuthDigestNonceLifetime 300</code></td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Context" class="help">Context:</a></td><td>directory, .htaccess</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Override" class="help">Override:</a></td><td>AuthConfig</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Status" class="help">Status:</a></td><td>Experimental</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Module" class="help">Module:</a></td><td>mod_auth_digest</td></tr></table></td></tr></table>
<p>The <code class="directive">AuthDigestNonceLifetime</code> directive
controls how long the server nonce is valid. When the client
contacts the server using an expired nonce the server will send
back a 401 with <code>stale=true</code>. If <em>seconds</em> is
greater than 0 then it specifies the amount of time for which the
nonce is valid; this should probably never be set to less than 10
seconds. If <em>seconds</em> is less than 0 then the nonce never
expires.
</p>
<hr/><h2><a name="AuthDigestQop">AuthDigestQop</a> <a name="authdigestqop">Directive</a></h2><table cellpadding="1" cellspacing="0" border="0" bgcolor="#cccccc"><tr><td><table bgcolor="#ffffff"><tr><td nowrap="nowrap"><strong>Description: </strong></td><td>Determines the quality-of-protection to use in digest
authentication</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Syntax" class="help">Syntax:</a></td><td>AuthDigestQop none|auth|auth-int [auth|auth-int]</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Default" class="help">Default:</a></td><td><code>AuthDigestQop auth</code></td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Context" class="help">Context:</a></td><td>directory, .htaccess</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Override" class="help">Override:</a></td><td>AuthConfig</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Status" class="help">Status:</a></td><td>Experimental</td></tr><tr><td nowrap="nowrap"><a href="directive-dict.html#Module" class="help">Module:</a></td><td>mod_auth_digest</td></tr></table></td></tr></table>
<p>The <code class="directive">AuthDigestQop</code> directive determines
the quality-of-protection to use. <em>auth</em> will only do
authentication plus integrity checking (an MD5 hash of the entity
is also computed and checked); <em>none</em> will cause the module
to use the old RFC-2069 digest algorithm (which does not include
integrity checking). Both <em>auth</em> and <em>auth-int</em> may
be specified, in which the case the browser will choose which of
these to use. <em>none</em> should only be used if the browser for
some reason does not like the challenge it receives otherwise.</p>
<p><strong><em>auth-int</em> is not implemented
yet</strong>.</p>
