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Extensible Markup Language  |  2006-01-15  |  22KB  |  329 lines
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  8. <title>mod_auth_digest - Apache HTTP Server</title>
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  14. <div id="page-header">
  15. <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>
  16. <p class="apache">Apache HTTP Server Version 2.2</p>
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  20. <a href="http://www.apache.org/">Apache</a> > <a href="http://httpd.apache.org/">HTTP Server</a> > <a href="http://httpd.apache.org/docs/">Documentation</a> > <a href="../">Version 2.2</a> > <a href="./">Modules</a></div>
  21. <div id="page-content">
  22. <div id="preamble"><h1>Apache Module mod_auth_digest</h1>
  23. <div class="toplang">
  24. <p><span>Available Languages: </span><a href="../en/mod/mod_auth_digest.html" title="English"> en </a> |
  25. <a href="../ko/mod/mod_auth_digest.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
  26. </div>
  27. <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>User authentication using MD5
  28.     Digest Authentication.</td></tr>
  29. <tr><th><a href="module-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
  30. <tr><th><a href="module-dict.html#ModuleIdentifier">ModuleáIdentifier:</a></th><td>auth_digest_module</td></tr>
  31. <tr><th><a href="module-dict.html#SourceFile">SourceáFile:</a></th><td>mod_auth_digest.c</td></tr></table>
  32. <h3>Summary</h3>
  33.  
  34.     <p>This module implements HTTP Digest Authentication. However, it
  35.     has not been extensively tested and is therefore marked
  36.     experimental.</p>
  37. </div>
  38. <div id="quickview"><h3 class="directives">Directives</h3>
  39. <ul id="toc">
  40. <li><img alt="" src="../images/down.gif" /> <a href="#authdigestalgorithm">AuthDigestAlgorithm</a></li>
  41. <li><img alt="" src="../images/down.gif" /> <a href="#authdigestdomain">AuthDigestDomain</a></li>
  42. <li><img alt="" src="../images/down.gif" /> <a href="#authdigestnccheck">AuthDigestNcCheck</a></li>
  43. <li><img alt="" src="../images/down.gif" /> <a href="#authdigestnonceformat">AuthDigestNonceFormat</a></li>
  44. <li><img alt="" src="../images/down.gif" /> <a href="#authdigestnoncelifetime">AuthDigestNonceLifetime</a></li>
  45. <li><img alt="" src="../images/down.gif" /> <a href="#authdigestprovider">AuthDigestProvider</a></li>
  46. <li><img alt="" src="../images/down.gif" /> <a href="#authdigestqop">AuthDigestQop</a></li>
  47. <li><img alt="" src="../images/down.gif" /> <a href="#authdigestshmemsize">AuthDigestShmemSize</a></li>
  48. </ul>
  49. <h3>Topics</h3>
  50. <ul id="topics">
  51. <li><img alt="" src="../images/down.gif" /> <a href="#using">Using Digest Authentication</a></li>
  52. <li><img alt="" src="../images/down.gif" /> <a href="#msie">Working with MS Internet Explorer</a></li>
  53. </ul><h3>See also</h3>
  54. <ul class="seealso">
  55. <li><code class="directive"><a href="../mod/core.html#authname">AuthName</a></code></li>
  56. <li><code class="directive"><a href="../mod/core.html#authtype">AuthType</a></code></li>
  57. <li><code class="directive"><a href="../mod/core.html#require">Require</a></code></li>
  58. <li><code class="directive"><a href="../mod/core.html#satisfy">Satisfy</a></code></li>
  59. <li><a href="../howto/auth.html">Authentication howto</a></li>
  60. </ul></div>
  61. <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  62. <div class="section">
  63. <h2><a name="using" id="using">Using Digest Authentication</a></h2>
  64.  
  65.     <p>Using MD5 Digest authentication is very simple. Simply set
  66.     up authentication normally, using <code>AuthType Digest</code> and
  67.     <code class="directive"><a href="#authdigestprovider">AuthDigestProvider</a></code>
  68.     instead of the normal <code>AuthType Basic</code> and
  69.     <code class="directive"><a href="../mod/mod_auth_basic.html#authbasicprovider">AuthBasicProvider</a></code>.
  70.     Then add a <code class="directive"><a href="#authdigestdomain">AuthDigestDomain</a></code> directive containing at least the root
  71.     URI(s) for this protection space.</p>
  72.  
  73.     <p>Appropriate user (text) files can be created using the
  74.     <code class="program"><a href="../programs/htdigest.html">htdigest</a></code> tool.</p>
  75.  
  76.     <div class="example"><h3>Example:</h3><p><code>
  77.       <Location /private/><br />
  78.       <span class="indent">
  79.         AuthType Digest<br />
  80.         AuthName "private area"<br />
  81.         AuthDigestDomain /private/ http://mirror.my.dom/private2/<br />
  82.     <br />
  83.     AuthDigestProvider file<br />
  84.         AuthUserFile /web/auth/.digest_pw<br />
  85.         Require valid-user<br />
  86.       </span>
  87.       </Location>
  88.     </code></p></div>
  89.  
  90.     <div class="note"><h3>Note</h3> 
  91.     <p>Digest authentication is more secure than Basic authentication,
  92.     but only works with supporting browsers. As of September 2004, major
  93.     browsers that support digest authentication include <a href="http://www.w3.org/Amaya/">Amaya</a>, <a href="http://konqueror.kde.org/">Konqueror</a>, <a href="http://www.microsoft.com/windows/ie/">MS Internet Explorer</a>
  94.     for Mac OS X and Windows (although the Windows version fails when
  95.     used with a query string -- see "<a href="#msie">Working with MS
  96.     Internet Explorer</a>" below for a workaround), <a href="http://www.mozilla.org">Mozilla</a>, <a href="http://channels.netscape.com/ns/browsers/download.jsp">
  97.     Netscape</a> 7, <a href="http://www.opera.com/">Opera</a>, and <a href="http://www.apple.com/safari/">Safari</a>. <a href="http://lynx.isc.org/">lynx</a> does <strong>not</strong>
  98.     support digest authentication. Since digest authentication is not as
  99.     widely implemented as basic authentication, you should use it only
  100.     in environments where all users will have supporting browsers.</p>
  101.     </div>
  102. </div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  103. <div class="section">
  104. <h2><a name="msie" id="msie">Working with MS Internet Explorer</a></h2>
  105.     <p>The Digest authentication implementation in current Internet
  106.     Explorer for Windows implementations has known issues, namely that
  107.     <code>GET</code> requests with a query string are not RFC compliant.
  108.     There are a few ways to work around this issue.</p>
  109.  
  110.     <p>
  111.     The first way is to use <code>POST</code> requests instead of
  112.     <code>GET</code> requests to pass data to your program.  This method
  113.     is the simplest approach if your application can work with this
  114.     limitation.
  115.     </p>
  116.  
  117.     <p>Since version 2.0.51 Apache also provides a workaround in the
  118.     <code>AuthDigestEnableQueryStringHack</code> environment variable.
  119.     If <code>AuthDigestEnableQueryStringHack</code> is set for the
  120.     request, Apache will take steps to work around the MSIE bug and
  121.     remove the request URI from the digest comparison.  Using this
  122.     method would look similar to the following.</p>
  123.  
  124.     <div class="example"><h3>Using Digest Authentication with MSIE:</h3><p><code>
  125.     BrowserMatch "MSIE" AuthDigestEnableQueryStringHack=On
  126.     </code></p></div>
  127.  
  128.     <p>See the <code class="directive"><a href="../mod/mod_setenvif.html#browsermatch">BrowserMatch</a></code>
  129.     directive for more details on conditionally setting environment
  130.     variables</p>
  131. </div>
  132. <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  133. <div class="directive-section"><h2><a name="AuthDigestAlgorithm" id="AuthDigestAlgorithm">AuthDigestAlgorithm</a> <a name="authdigestalgorithm" id="authdigestalgorithm">Directive</a></h2>
  134. <table class="directive">
  135. <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Selects the algorithm used to calculate the challenge and
  136. response hashes in digest authentication</td></tr>
  137. <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDigestAlgorithm MD5|MD5-sess</code></td></tr>
  138. <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthDigestAlgorithm MD5</code></td></tr>
  139. <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
  140. <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
  141. <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
  142. <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_digest</td></tr>
  143. </table>
  144.     <p>The <code class="directive">AuthDigestAlgorithm</code> directive
  145.     selects the algorithm used to calculate the challenge and response
  146.     hashes.</p>
  147.  
  148.     <div class="note">
  149.       <code>MD5-sess</code> is not correctly implemented yet.
  150.     </div>
  151.     
  152.  
  153. </div>
  154. <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  155. <div class="directive-section"><h2><a name="AuthDigestDomain" id="AuthDigestDomain">AuthDigestDomain</a> <a name="authdigestdomain" id="authdigestdomain">Directive</a></h2>
  156. <table class="directive">
  157. <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>URIs that are in the same protection space for digest
  158. authentication</td></tr>
  159. <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDigestDomain <var>URI</var> [<var>URI</var>] ...</code></td></tr>
  160. <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
  161. <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
  162. <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
  163. <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_digest</td></tr>
  164. </table>
  165.     <p>The <code class="directive">AuthDigestDomain</code> directive allows
  166.     you to specify one or more URIs which are in the same protection
  167.     space (<em>i.e.</em> use the same realm and username/password info).
  168.     The specified URIs are prefixes; the client will assume
  169.     that all URIs "below" these are also protected by the same
  170.     username/password. The URIs may be either absolute URIs (<em>i.e.</em>
  171.     including a scheme, host, port, etc.) or relative URIs.</p>
  172.  
  173.     <p>This directive <em>should</em> always be specified and
  174.     contain at least the (set of) root URI(s) for this space.
  175.     Omitting to do so will cause the client to send the
  176.     Authorization header for <em>every request</em> sent to this
  177.     server. Apart from increasing the size of the request, it may
  178.     also have a detrimental effect on performance if <code class="directive"><a href="#authdigestnccheck">AuthDigestNcCheck</a></code> is on.</p>
  179.  
  180.     <p>The URIs specified can also point to different servers, in
  181.     which case clients (which understand this) will then share
  182.     username/password info across multiple servers without
  183.     prompting the user each time. </p>
  184.  
  185. </div>
  186. <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  187. <div class="directive-section"><h2><a name="AuthDigestNcCheck" id="AuthDigestNcCheck">AuthDigestNcCheck</a> <a name="authdigestnccheck" id="authdigestnccheck">Directive</a></h2>
  188. <table class="directive">
  189. <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Enables or disables checking of the nonce-count sent by the
  190. server</td></tr>
  191. <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDigestNcCheck On|Off</code></td></tr>
  192. <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthDigestNcCheck Off</code></td></tr>
  193. <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr>
  194. <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
  195. <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_digest</td></tr>
  196. </table>
  197.     <div class="note">
  198.       Not implemented yet.
  199.     </div>
  200.     
  201.  
  202. </div>
  203. <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  204. <div class="directive-section"><h2><a name="AuthDigestNonceFormat" id="AuthDigestNonceFormat">AuthDigestNonceFormat</a> <a name="authdigestnonceformat" id="authdigestnonceformat">Directive</a></h2>
  205. <table class="directive">
  206. <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Determines how the nonce is generated</td></tr>
  207. <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDigestNonceFormat <var>format</var></code></td></tr>
  208. <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
  209. <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
  210. <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
  211. <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_digest</td></tr>
  212. </table>
  213.     <div class="note">Not implemented yet.</div>
  214.     
  215.  
  216. </div>
  217. <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  218. <div class="directive-section"><h2><a name="AuthDigestNonceLifetime" id="AuthDigestNonceLifetime">AuthDigestNonceLifetime</a> <a name="authdigestnoncelifetime" id="authdigestnoncelifetime">Directive</a></h2>
  219. <table class="directive">
  220. <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>How long the server nonce is valid</td></tr>
  221. <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDigestNonceLifetime <var>seconds</var></code></td></tr>
  222. <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthDigestNonceLifetime 300</code></td></tr>
  223. <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
  224. <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
  225. <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
  226. <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_digest</td></tr>
  227. </table>
  228.     <p>The <code class="directive">AuthDigestNonceLifetime</code> directive
  229.     controls how long the server nonce is valid. When the client
  230.     contacts the server using an expired nonce the server will send
  231.     back a 401 with <code>stale=true</code>. If <var>seconds</var> is
  232.     greater than 0 then it specifies the amount of time for which the
  233.     nonce is valid; this should probably never be set to less than 10
  234.     seconds. If <var>seconds</var> is less than 0 then the nonce never
  235.     expires. 
  236.     </p>
  237.  
  238. </div>
  239. <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  240. <div class="directive-section"><h2><a name="AuthDigestProvider" id="AuthDigestProvider">AuthDigestProvider</a> <a name="authdigestprovider" id="authdigestprovider">Directive</a></h2>
  241. <table class="directive">
  242. <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets the authentication provider(s) for this location</td></tr>
  243. <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDigestProvider <var>provider-name</var>
  244. [<var>provider-name</var>] ...</code></td></tr>
  245. <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthDigestProvider file</code></td></tr>
  246. <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
  247. <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
  248. <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
  249. <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_digest</td></tr>
  250. </table>
  251.     <p>The <code class="directive">AuthDigestProvider</code> directive sets 
  252.     which provider is used to authenticate the users for this location.
  253.     The default <code>file</code> provider is implemented
  254.     by the <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code> module.  Make sure
  255.     that the chosen provider module is present in the server.</p>
  256.  
  257.     <p>See <code class="module"><a href="../mod/mod_authn_dbm.html">mod_authn_dbm</a></code>, <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code>, 
  258.     and <code class="module"><a href="../mod/mod_authn_dbd.html">mod_authn_dbd</a></code> for providers.</p>
  259.  
  260. </div>
  261. <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  262. <div class="directive-section"><h2><a name="AuthDigestQop" id="AuthDigestQop">AuthDigestQop</a> <a name="authdigestqop" id="authdigestqop">Directive</a></h2>
  263. <table class="directive">
  264. <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Determines the quality-of-protection to use in digest
  265. authentication</td></tr>
  266. <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDigestQop none|auth|auth-int [auth|auth-int]</code></td></tr>
  267. <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthDigestQop auth</code></td></tr>
  268. <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory, .htaccess</td></tr>
  269. <tr><th><a href="directive-dict.html#Override">Override:</a></th><td>AuthConfig</td></tr>
  270. <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
  271. <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_digest</td></tr>
  272. </table>
  273.     <p>The <code class="directive">AuthDigestQop</code> directive determines
  274.     the <dfn>quality-of-protection</dfn> to use. <code>auth</code> will
  275.     only do authentication (username/password); <code>auth-int</code> is
  276.     authentication plus integrity checking (an MD5 hash of the entity
  277.     is also computed and checked); <code>none</code> will cause the module
  278.     to use the old RFC-2069 digest algorithm (which does not include
  279.     integrity checking). Both <code>auth</code> and <code>auth-int</code> may
  280.     be specified, in which the case the browser will choose which of
  281.     these to use. <code>none</code> should only be used if the browser for
  282.     some reason does not like the challenge it receives otherwise.</p>
  283.  
  284.     <div class="note">
  285.       <code>auth-int</code> is not implemented yet.
  286.     </div>
  287.  
  288. </div>
  289. <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
  290. <div class="directive-section"><h2><a name="AuthDigestShmemSize" id="AuthDigestShmemSize">AuthDigestShmemSize</a> <a name="authdigestshmemsize" id="authdigestshmemsize">Directive</a></h2>
  291. <table class="directive">
  292. <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The amount of shared memory to allocate for keeping track
  293. of clients</td></tr>
  294. <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDigestShmemSize <var>size</var></code></td></tr>
  295. <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthDigestShmemSize 1000</code></td></tr>
  296. <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr>
  297. <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Experimental</td></tr>
  298. <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_digest</td></tr>
  299. </table>
  300.     <p>The <code class="directive">AuthDigestShmemSize</code> directive defines
  301.     the amount of shared memory, that will be allocated at the server
  302.     startup for keeping track of clients. Note that the shared memory
  303.     segment cannot be set less than the space that is necessary for
  304.     tracking at least <em>one</em> client. This value is dependant on your
  305.     system. If you want to find out the exact value, you may simply
  306.     set <code class="directive">AuthDigestShmemSize</code> to the value of
  307.     <code>0</code> and read the error message after trying to start the
  308.     server.</p>
  309.  
  310.     <p>The <var>size</var> is normally expressed in Bytes, but you
  311.     may let the number follow a <code>K</code> or an <code>M</code> to
  312.     express your value as KBytes or MBytes. For example, the following
  313.     directives are all equivalent:</p>
  314.  
  315.     <div class="example"><p><code>
  316.       AuthDigestShmemSize 1048576<br />
  317.       AuthDigestShmemSize 1024K<br />
  318.       AuthDigestShmemSize 1M
  319.     </code></p></div>
  320.  
  321. </div>
  322. </div>
  323. <div class="bottomlang">
  324. <p><span>Available Languages: </span><a href="../en/mod/mod_auth_digest.html" title="English"> en </a> |
  325. <a href="../ko/mod/mod_auth_digest.html" hreflang="ko" rel="alternate" title="Korean"> ko </a></p>
  326. </div><div id="footer">
  327. <p class="apache">Copyright 1995-2006 The Apache Software Foundation or its licensors, as applicable.<br />Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a>.</p>
  328. <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>
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