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-<div id="page-content">
-<div id="preamble"><h1>Apache Module mod_auth_digest</h1>
-<div class="toplang">
-<p><span>Available Languages: </span><a href="../en/mod/mod_auth_digest.html" title="English"> en </a> |
-<a href="../ko/mod/mod_auth_digest.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
-</div>
-<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>User authentication using MD5
- Digest Authentication.</td></tr>
-<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
-<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>auth_digest_module</td></tr>
-<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_auth_digest.c</td></tr></table>
-<h3>Summary</h3>
-
- <p>This module implements HTTP Digest Authentication. However, it
- has not been extensively tested and is therefore marked
- experimental.</p>
-</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>
-<li><img alt="" src="../images/down.gif" /> <a href="#authdigestdomain">AuthDigestDomain</a></li>
-<li><img alt="" src="../images/down.gif" /> <a href="#authdigestfile">AuthDigestFile</a></li>
-<li><img alt="" src="../images/down.gif" /> <a href="#authdigestgroupfile">AuthDigestGroupFile</a></li>
-<li><img alt="" src="../images/down.gif" /> <a href="#authdigestnccheck">AuthDigestNcCheck</a></li>
-<li><img alt="" src="../images/down.gif" /> <a href="#authdigestnonceformat">AuthDigestNonceFormat</a></li>
-<li><img alt="" src="../images/down.gif" /> <a href="#authdigestnoncelifetime">AuthDigestNonceLifetime</a></li>
-<li><img alt="" src="../images/down.gif" /> <a href="#authdigestqop">AuthDigestQop</a></li>
-<li><img alt="" src="../images/down.gif" /> <a href="#authdigestshmemsize">AuthDigestShmemSize</a></li>
-</ul>
-<h3>Topics</h3>
-<ul id="topics">
-<li><img alt="" src="../images/down.gif" /> <a href="#using">Using Digest Authentication</a></li>
-<li><img alt="" src="../images/down.gif" /> <a href="#msie">Working with MS Internet Explorer</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/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><a name="using" id="using">Using Digest Authentication</a></h2>
-
- <p>Using MD5 Digest authentication is very simple. Simply set
- up authentication normally, using <code>AuthType Digest</code> and
- <code class="directive"><a href="#authdigestfile">AuthDigestFile</a></code> instead
- of the normal <code>AuthType Basic</code> and <code class="directive"><a href="../mod/mod_auth.html#authuserfile">AuthUserFile</a></code>; also, replace any <code class="directive"><a href="../mod/mod_auth.html#authgroupfile">AuthGroupFile</a></code> with <code class="directive"><a href="#authdigestgroupfile">AuthDigestGroupFile</a></code>. Then add a
- <code class="directive"><a href="#authdigestdomain">AuthDigestDomain</a></code> directive
- containing at least the root URI(s) for this protection space.</p>
-
- <p>Appropriate user (text) files can be created using the
- <code class="program"><a href="../programs/htdigest.html">htdigest</a></code> tool.</p>
-
- <div class="example"><h3>Example:</h3><p><code>
- <Location /private/><br />
- <span class="indent">
- AuthType Digest<br />
- AuthName "private area"<br />
- AuthDigestDomain /private/ http://mirror.my.dom/private2/<br />
- AuthDigestFile /web/auth/.digest_pw<br />
- Require valid-user<br />
- </span>
- </Location>
- </code></p></div>
-
- <div class="note"><h3>Note</h3>
- <p>Digest authentication provides a more secure password system
- than Basic authentication, but only works with supporting
- browsers. As of November 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 - see "<a href="#msie">Working with MS Internet Explorer</a>" below for a workaround), <a href="http://www.w3.org/Amaya/">Amaya</a>, <a href="http://www.mozilla.org">Mozilla</a> and <a href="http://channels.netscape.com/ns/browsers/download.jsp">Netscape</a> since version 7. Since digest authentication is not
- as widely implemented as basic authentication, you should use it only
- in controlled environments.</p>
- </div>
-</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
-<div class="section">
-<h2><a name="msie" id="msie">Working with MS Internet Explorer</a></h2>
- <p>The Digest authentication implementation in previous Internet
- Explorer for Windows versions (5 and 6) had issues, namely that
- <code>GET</code> requests with a query string were not RFC compliant.
- There are a few ways to work around this issue.</p>
-
- <p>
- The first way is to use <code>POST</code> requests instead of
- <code>GET</code> requests to pass data to your program. This method
- is the simplest approach if your application can work with this
- limitation.
- </p>
-
- <p>Since version 2.0.51 Apache also provides a workaround in the
- <code>AuthDigestEnableQueryStringHack</code> environment variable.
- If <code>AuthDigestEnableQueryStringHack</code> is set for the
- request, Apache will take steps to work around the MSIE bug and
- remove the query string from the digest comparison. Using this
- method would look similar to the following.</p>
-
- <div class="example"><h3>Using Digest Authentication with MSIE:</h3><p><code>
- BrowserMatch "MSIE" AuthDigestEnableQueryStringHack=On
- </code></p></div>
-
- <p>This workaround is not necessary for MSIE 7, though enabling it does
- not cause any compatibility issues or significant overhead.</p>
-
- <p>See the <code class="directive"><a href="../mod/mod_setenvif.html#browsermatch">BrowserMatch</a></code>
- directive for more details on conditionally setting environment
- variables</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="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:</a></th><td>Selects the algorithm used to calculate the challenge and
-response hases in digest authentication</td></tr>
-<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDigestAlgorithm MD5|MD5-sess</code></td></tr>
-<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthDigestAlgorithm MD5</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>Experimental</td></tr>
-<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_digest</td></tr>
-</table>
- <p>The <code class="directive">AuthDigestAlgorithm</code> directive
- selects the algorithm used to calculate the challenge and response
- hashes.</p>
-
- <div class="note">
- <code>MD5-sess</code> is not correctly implemented yet.
- </div>
-
-
-</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:</a></th><td>URIs that are in the same protection space for digest
-authentication</td></tr>
-<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDigestDomain <var>URI</var> [<var>URI</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>Experimental</td></tr>
-<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_digest</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
- space (<em>i.e.</em> use the same realm and username/password info).
- The specified URIs are prefixes, <em>i.e.</em> the client will assume
- that all URIs "below" these are also protected by the same
- username/password. The URIs may be either absolute URIs (<em>i.e.</em>
- including 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 <code class="directive"><a href="#authdigestnccheck">AuthDigestNcCheck</a></code> is on.</p>
-
- <p>The URIs specified can also point to different servers, in
- which case clients (which understand this) will then share
- username/password info across multiple servers without
- prompting the user each time.</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="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:</a></th><td>Location of the text file containing the list
-of users and encoded passwords for digest authentication</td></tr>
-<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDigestFile <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>Experimental</td></tr>
-<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_digest</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. <var>File-path</var> is the
- absolute path to the user file.</p>
-
- <p>The digest file uses a special format. Files in this format
- can be created using the <code class="program"><a href="../programs/htdigest.html">htdigest</a></code> utility found in
- the <code>support/</code> subdirectory of the Apache distribution.</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="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:</a></th><td>Name of the text file containing the list of groups
-for digest authentication</td></tr>
-<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDigestGroupFile <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>Experimental</td></tr>
-<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_digest</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). <var>File-path</var> 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>
-
- <div class="example"><p><code>mygroup: bob joe anne</code></p></div>
-
- <p>Note that searching large text files is <em>very</em>
- inefficient.</p>
-
- <div class="warning"><h3>Security:</h3>
- <p>Make sure that the <code class="directive">AuthGroupFile</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 may be able
- to download the <code class="directive">AuthGroupFile</code>.</p>
- </div>
-
-</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:</a></th><td>Enables or disables checking of the nonce-count sent by the
-server</td></tr>
-<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDigestNcCheck On|Off</code></td></tr>
-<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthDigestNcCheck Off</code></td></tr>
-<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr>
-<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
-<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_digest</td></tr>
-</table>
- <div class="note">
- Not implemented yet.
- </div>
-
-
-</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:</a></th><td>Determines how the nonce is generated</td></tr>
-<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDigestNonceFormat <var>format</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>Experimental</td></tr>
-<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_digest</td></tr>
-</table>
- <div class="note">Not implemented yet.</div>
-
-
-</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:</a></th><td>How long the server nonce is valid</td></tr>
-<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDigestNonceLifetime <var>seconds</var></code></td></tr>
-<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthDigestNonceLifetime 300</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>Experimental</td></tr>
-<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_digest</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 <var>seconds</var> 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 <var>seconds</var> is less than 0 then the nonce never
- expires.
- </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="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:</a></th><td>Determines the quality-of-protection to use in digest
-authentication</td></tr>
-<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDigestQop none|auth|auth-int [auth|auth-int]</code></td></tr>
-<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthDigestQop auth</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>Experimental</td></tr>
-<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_digest</td></tr>
-</table>
- <p>The <code class="directive">AuthDigestQop</code> directive determines
- the <dfn>quality-of-protection</dfn> to use. <code>auth</code> will only do
- authentication (username/password); <code>auth-int</code> is
- authentication plus integrity checking (an MD5 hash of the entity
- is also computed and checked); <code>none</code> will cause the module
- to use the old RFC-2069 digest algorithm (which does not include
- integrity checking). Both <code>auth</code> and <code>auth-int</code> may
- be specified, in which the case the browser will choose which of
- these to use. <code>none</code> should only be used if the browser for
- some reason does not like the challenge it receives otherwise.</p>
-
- <div class="note">
- <code>auth-int</code> is not implemented yet.
- </div>
-
-</div>
-<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
-<div class="directive-section"><h2><a name="AuthDigestShmemSize" id="AuthDigestShmemSize">AuthDigestShmemSize</a> <a name="authdigestshmemsize" id="authdigestshmemsize">Directive</a></h2>
-<table class="directive">
-<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The amount of shared memory to allocate for keeping track
-of clients</td></tr>
-<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDigestShmemSize <var>size</var></code></td></tr>
-<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthDigestShmemSize 1000</code></td></tr>
-<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr>
-<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
-<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_digest</td></tr>
-</table>
- <p>The <code class="directive">AuthDigestShmemSize</code> directive defines
- the amount of shared memory, that will be allocated at the server
- startup for keeping track of clients. Note that the shared memory
- segment cannot be set less than the space that is neccessary for
- tracking at least <em>one</em> client. This value is dependant on your
- system. If you want to find out the exact value, you may simply
- set <code class="directive">AuthDigestShmemSize</code> to the value of
- <code>0</code> and read the error message after trying to start the
- server.</p>
-
- <p>The <var>size</var> is normally expressed in Bytes, but you
- may let the number follow a <code>K</code> or an <code>M</code> to
- express your value as KBytes or MBytes. For example, the following
- directives are all equivalent:</p>
-
- <div class="example"><p><code>
- AuthDigestShmemSize 1048576<br />
- AuthDigestShmemSize 1024K<br />
- AuthDigestShmemSize 1M
- </code></p></div>
-
-</div>
-</div>
-<div class="bottomlang">
-<p><span>Available Languages: </span><a href="../en/mod/mod_auth_digest.html" title="English"> en </a> |
-<a href="../ko/mod/mod_auth_digest.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
-</div><div id="footer">
-<p class="apache">Copyright 2009 The Apache Software Foundation.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</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>
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