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--><title>mod_auth_digest - Apache HTTP Server</title><link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" /><link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" /><link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" /><link href="../images/favicon.ico" rel="shortcut icon" /></head><body><div id="page-header"><p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p><p class="apache">Apache HTTP Server Version 2.0</p><img alt="" src="../images/feather.gif" /></div><div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div><div id="path"><a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs-project/">Documentation</a> > <a href="../">Version 2.0</a> > <a href="./">Modules</a></div><div id="page-content"><div id="preamble"><h1>Apache Module mod_auth_digest</h1><table class="module"><tr><th><a href="module-dict.html#Description">Description:
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</a></th><td>User authentication using MD5
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Digest Authentication.</td></tr><tr><th><a href="module-dict.html#Status">Status:
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</a></th><td>Experimental</td></tr><tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:
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</a></th><td>auth_digest_module</td></tr><tr><th><a href="module-dict.html#SourceFile">Source File:
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</a></th><td>mod_auth_digest.c</td></tr></table><h3>Summary</h3>
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<p>This module implements HTTP Digest Authentication. However, it
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has not been extensively tested and is therefore marked
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experimental.</p>
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</div><div id="quickview"><h3 class="directives">Directives</h3><ul id="toc"><li><img alt="" src="../images/down.gif" /> <a href="#authdigestalgorithm">AuthDigestAlgorithm</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#authdigestdomain">AuthDigestDomain</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#authdigestfile">AuthDigestFile</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#authdigestgroupfile">AuthDigestGroupFile</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#authdigestnccheck">AuthDigestNcCheck</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#authdigestnonceformat">AuthDigestNonceFormat</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#authdigestnoncelifetime">AuthDigestNonceLifetime</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#authdigestqop">AuthDigestQop</a></li>
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</ul><h3>Topics</h3><ul id="topics"><li><img alt="" src="../images/down.gif" /> Using Digest Authentication</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/core.html#require">Require</a></code></li><li><code class="directive"><a href="../mod/core.html#satisfy">Satisfy</a></code></li></ul></div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div><div class="section"><h2>Using Digest Authentication</h2>
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<p>Using MD5 Digest authentication is very simple. Simply set
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up authentication normally, using "AuthType Digest" and
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"AuthDigestFile" instead of the normal "AuthType Basic" and
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"AuthUserFile"; also, replace any "AuthGroupFile" with
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"AuthDigestGroupFile". Then add a "AuthDigestDomain" directive
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containing at least the root URI(s) for this protection space.
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Example:</p>
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<div class="example"><p><code>
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<Location /private/><br />
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AuthType Digest<br />
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AuthName "private area"<br />
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AuthDigestDomain /private/ http://mirror.my.dom/private2/<br />
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AuthDigestFile /web/auth/.digest_pw<br />
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Require valid-user<br />
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</Location>
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</code></p></div>
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<div class="note"><h3>Note</h3>
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<p>Digest authentication provides a more secure password system
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than Basic authentication, but only works with supporting
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browsers. As of July 2002, the major browsers that support digest
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authentication are <a href="http://www.opera.com/">Opera</a>, <a href="http://www.microsoft.com/windows/ie/">MS Internet
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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
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authentication is not as widely implemented as basic
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authentication, you should use it only in controlled settings.</p>
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</div>
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</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div><div class="directive-section"><h2><a name="AuthDigestAlgorithm" id="AuthDigestAlgorithm">AuthDigestAlgorithm</a> <a name="authdigestalgorithm" id="authdigestalgorithm">Directive</a></h2><table class="directive"><tr><th><a href="directive-dict.html#Description">Description:
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</a></th><td>Selects the algorithm used to calculate the challenge and
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response hases in digest authentication</td></tr><tr><th><a href="directive-dict.html#Syntax">Syntax:
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</a></th><td><code>AuthDigestAlgorithm MD5|MD5-sess</code></td></tr><tr><th><a href="directive-dict.html#Default">Default:
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</a></th><td><code>AuthDigestAlgorithm MD5</code></td></tr><tr><th><a href="directive-dict.html#Context">Context:
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</a></th><td>directory, .htaccess</td></tr><tr><th><a href="directive-dict.html#Override">Override:
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</a></th><td>AuthConfig</td></tr><tr><th><a href="directive-dict.html#Status">Status:
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</a></th><td>Experimental</td></tr><tr><th><a href="directive-dict.html#Module">Module:
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</a></th><td>mod_auth_digest</td></tr></table>
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<p>The <code class="directive">AuthDigestAlgorithm</code> directive
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selects the algorithm used to calculate the challenge and response
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hashes.</p>
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<p><strong><em>MD5-sess</em> is not correctly implemented
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yet</strong>.
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</p>
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</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div><div class="directive-section"><h2><a name="AuthDigestDomain" id="AuthDigestDomain">AuthDigestDomain</a> <a name="authdigestdomain" id="authdigestdomain">Directive</a></h2><table class="directive"><tr><th><a href="directive-dict.html#Description">Description:
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</a></th><td>URIs that are in the same protection space for digest
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authentication</td></tr><tr><th><a href="directive-dict.html#Syntax">Syntax:
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</a></th><td><code>AuthDigestDomain <em>URI</em> [<em>URI</em>] ...</code></td></tr><tr><th><a href="directive-dict.html#Context">Context:
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</a></th><td>directory, .htaccess</td></tr><tr><th><a href="directive-dict.html#Override">Override:
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</a></th><td>AuthConfig</td></tr><tr><th><a href="directive-dict.html#Status">Status:
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</a></th><td>Experimental</td></tr><tr><th><a href="directive-dict.html#Module">Module:
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</a></th><td>mod_auth_digest</td></tr></table>
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<p>The <code class="directive">AuthDigestDomain</code> directive allows
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you to specify one or more URIs which are in the same protection
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space (i.e. use the same realm and username/password info). The
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specified URIs are prefixes, i.e. the client will assume that all
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URIs "below" these are also protected by the same
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username/password. The URIs may be either absolute URIs
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(i.e. inluding a scheme, host, port, etc) or relative URIs.</p>
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<p>This directive <em>should</em> always be specified and
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contain at least the (set of) root URI(s) for this space.
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Omitting to do so will cause the client to send the
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Authorization header for <em>every request</em> sent to this
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server. Apart from increasing the size of the request, it may
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also have a detrimental effect on performance if
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"AuthDigestNcCheck" is on.</p>
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<p>The URIs specified can also point to different servers, in
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which case clients (which understand this) will then share
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username/password info across multiple servers without
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prompting the user each time. </p>
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</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div><div class="directive-section"><h2><a name="AuthDigestFile" id="AuthDigestFile">AuthDigestFile</a> <a name="authdigestfile" id="authdigestfile">Directive</a></h2><table class="directive"><tr><th><a href="directive-dict.html#Description">Description:
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</a></th><td>Location of the text file containing the list
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of users and encoded passwords for digest authentication</td></tr><tr><th><a href="directive-dict.html#Syntax">Syntax:
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</a></th><td><code>AuthDigestFile <em>file-path</em></code></td></tr><tr><th><a href="directive-dict.html#Context">Context:
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</a></th><td>directory, .htaccess</td></tr><tr><th><a href="directive-dict.html#Override">Override:
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</a></th><td>AuthConfig</td></tr><tr><th><a href="directive-dict.html#Status">Status:
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</a></th><td>Experimental</td></tr><tr><th><a href="directive-dict.html#Module">Module:
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</a></th><td>mod_auth_digest</td></tr></table>
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<p>The <code class="directive">AuthDigestFile</code> directive sets the
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name of a textual file containing the list of users and encoded
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passwords for digest authentication. <em>File-path</em> is the
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absolute path to the user file.</p>
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<p>The digest file uses a special format. Files in this format
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can be created using the <a href="../programs/htdigest.html">htdigest</a> utility found in
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the support/ subdirectory of the Apache distribution.</p>
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</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div><div class="directive-section"><h2><a name="AuthDigestGroupFile" id="AuthDigestGroupFile">AuthDigestGroupFile</a> <a name="authdigestgroupfile" id="authdigestgroupfile">Directive</a></h2><table class="directive"><tr><th><a href="directive-dict.html#Description">Description:
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</a></th><td>Name of the text file containing the list of groups
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for digest authentication</td></tr><tr><th><a href="directive-dict.html#Syntax">Syntax:
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</a></th><td><code>AuthDigestGroupFile <em>file-path</em></code></td></tr><tr><th><a href="directive-dict.html#Context">Context:
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</a></th><td>directory, .htaccess</td></tr><tr><th><a href="directive-dict.html#Override">Override:
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</a></th><td>AuthConfig</td></tr><tr><th><a href="directive-dict.html#Status">Status:
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</a></th><td>Experimental</td></tr><tr><th><a href="directive-dict.html#Module">Module:
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</a></th><td>mod_auth_digest</td></tr></table>
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<p>The <code class="directive">AuthDigestGroupFile</code> directive sets
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the name of a textual file containing the list of groups and their
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members (user names). <em>File-path</em> is the absolute path to
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the group file.</p>
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<p>Each line of the group file contains a groupname followed by
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a colon, followed by the member usernames separated by spaces.
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Example:</p>
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<div class="example"><p><code>mygroup: bob joe anne</code></p></div>
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<p>Note that searching large text files is <em>very</em>
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inefficient.</p>
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<p>Security: make sure that the AuthGroupFile is stored outside
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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
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to download the AuthGroupFile.</p>
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</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div><div class="directive-section"><h2><a name="AuthDigestNcCheck" id="AuthDigestNcCheck">AuthDigestNcCheck</a> <a name="authdigestnccheck" id="authdigestnccheck">Directive</a></h2><table class="directive"><tr><th><a href="directive-dict.html#Description">Description:
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</a></th><td>Enables or disables checking of the nonce-count sent by the
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server</td></tr><tr><th><a href="directive-dict.html#Syntax">Syntax:
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</a></th><td><code>AuthDigestNcCheck On|Off</code></td></tr><tr><th><a href="directive-dict.html#Default">Default:
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</a></th><td><code>AuthDigestNcCheck Off</code></td></tr><tr><th><a href="directive-dict.html#Context">Context:
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</a></th><td>server config</td></tr><tr><th><a href="directive-dict.html#Status">Status:
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</a></th><td>Experimental</td></tr><tr><th><a href="directive-dict.html#Module">Module:
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</a></th><td>mod_auth_digest</td></tr></table>
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<p><strong>Not implemented yet.</strong>
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</p>
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</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div><div class="directive-section"><h2><a name="AuthDigestNonceFormat" id="AuthDigestNonceFormat">AuthDigestNonceFormat</a> <a name="authdigestnonceformat" id="authdigestnonceformat">Directive</a></h2><table class="directive"><tr><th><a href="directive-dict.html#Description">Description:
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</a></th><td>Determines how the nonce is generated</td></tr><tr><th><a href="directive-dict.html#Syntax">Syntax:
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</a></th><td><code>AuthDigestNonceFormat <em>format</em></code></td></tr><tr><th><a href="directive-dict.html#Context">Context:
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</a></th><td>directory, .htaccess</td></tr><tr><th><a href="directive-dict.html#Override">Override:
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</a></th><td>AuthConfig</td></tr><tr><th><a href="directive-dict.html#Status">Status:
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</a></th><td>Experimental</td></tr><tr><th><a href="directive-dict.html#Module">Module:
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</a></th><td>mod_auth_digest</td></tr></table>
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<p><strong>Not implemented yet.</strong>
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</p>
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</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div><div class="directive-section"><h2><a name="AuthDigestNonceLifetime" id="AuthDigestNonceLifetime">AuthDigestNonceLifetime</a> <a name="authdigestnoncelifetime" id="authdigestnoncelifetime">Directive</a></h2><table class="directive"><tr><th><a href="directive-dict.html#Description">Description:
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</a></th><td>How long the server nonce is valid</td></tr><tr><th><a href="directive-dict.html#Syntax">Syntax:
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</a></th><td><code>AuthDigestNonceLifetime <em>seconds</em></code></td></tr><tr><th><a href="directive-dict.html#Default">Default:
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</a></th><td><code>AuthDigestNonceLifetime 300</code></td></tr><tr><th><a href="directive-dict.html#Context">Context:
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</a></th><td>directory, .htaccess</td></tr><tr><th><a href="directive-dict.html#Override">Override:
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</a></th><td>AuthConfig</td></tr><tr><th><a href="directive-dict.html#Status">Status:
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</a></th><td>Experimental</td></tr><tr><th><a href="directive-dict.html#Module">Module:
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</a></th><td>mod_auth_digest</td></tr></table>
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<p>The <code class="directive">AuthDigestNonceLifetime</code> directive
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controls how long the server nonce is valid. When the client
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contacts the server using an expired nonce the server will send
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back a 401 with <code>stale=true</code>. If <em>seconds</em> is
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greater than 0 then it specifies the amount of time for which the
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nonce is valid; this should probably never be set to less than 10
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seconds. If <em>seconds</em> is less than 0 then the nonce never
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expires.
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</p>
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</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div><div class="directive-section"><h2><a name="AuthDigestQop" id="AuthDigestQop">AuthDigestQop</a> <a name="authdigestqop" id="authdigestqop">Directive</a></h2><table class="directive"><tr><th><a href="directive-dict.html#Description">Description:
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</a></th><td>Determines the quality-of-protection to use in digest
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authentication</td></tr><tr><th><a href="directive-dict.html#Syntax">Syntax:
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</a></th><td><code>AuthDigestQop none|auth|auth-int [auth|auth-int]</code></td></tr><tr><th><a href="directive-dict.html#Default">Default:
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</a></th><td><code>AuthDigestQop auth</code></td></tr><tr><th><a href="directive-dict.html#Context">Context:
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</a></th><td>directory, .htaccess</td></tr><tr><th><a href="directive-dict.html#Override">Override:
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</a></th><td>AuthConfig</td></tr><tr><th><a href="directive-dict.html#Status">Status:
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</a></th><td>Experimental</td></tr><tr><th><a href="directive-dict.html#Module">Module:
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</a></th><td>mod_auth_digest</td></tr></table>
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<p>The <code class="directive">AuthDigestQop</code> directive determines
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the quality-of-protection to use. <em>auth</em> will only do
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authentication (username/password); <em>auth-int</em> is
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authentication plus integrity checking (an MD5 hash of the entity
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is also computed and checked); <em>none</em> will cause the module
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to use the old RFC-2069 digest algorithm (which does not include
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integrity checking). Both <em>auth</em> and <em>auth-int</em> may
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be specified, in which the case the browser will choose which of
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these to use. <em>none</em> should only be used if the browser for
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some reason does not like the challenge it receives otherwise.</p>
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<p><strong><em>auth-int</em> is not implemented
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yet</strong>.</p>
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</div></div><div id="footer"><p class="apache">Maintained by the <a href="http://httpd.apache.org/docs-project/">Apache HTTP Server Documentation Project</a></p><p class="menu"><a href="../mod/">Modules</a> | <a href="../mod/directives.html">Directives</a> | <a href="../faq/">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div></body></html> |