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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="#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="#authdigestprovider">AuthDigestProvider</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="#authdigestprovider">AuthDigestProvider</a></code> |
| instead of the normal <code>AuthType Basic</code> and |
| <code class="directive"><a href="../mod/mod_auth_basic.html#authbasicprovider">AuthBasicProvider</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 |
| <a href="../programs/htdigest.html">htdigest</a> 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 /> |
| <br /> |
| AuthDigestProvider file<br /> |
| AuthUserFile /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 current Internet |
| Explorer implementations has known issues, namely that <code>GET</code> |
| requests with a query string are 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 request URI 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>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 hashes 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; 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="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="AuthDigestProvider" id="AuthDigestProvider">AuthDigestProvider</a> <a name="authdigestprovider" id="authdigestprovider">Directive</a></h2> |
| <table class="directive"> |
| <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets the authentication provider(s) for this location</td></tr> |
| <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDigestProvider On|Off|<var>provider-name</var> |
| [<var>provider-name</var>] ...</code></td></tr> |
| <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthDigestProvider On</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">AuthDigestProvider</code> directive sets |
| which provider is used to authenticate the users for this location. |
| Setting the value to <code>On</code> will choose the default provider |
| (<code>file</code>). Since the <code>file</code> provider is implemented |
| by the <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code> module, you have to make sure, |
| that the module is present in the server.</p> |
| |
| <p>See <code class="module"><a href="../mod/mod_authn_dbm.html">mod_authn_dbm</a></code> and <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code> |
| for providers.</p> |
| |
| <p>The value <code>Off</code> clears the provider list and sets it back |
| to the default.</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 necessary 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 1999-2004 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> |
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