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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 06:33:50 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 06:33:50 +0000 |
| commit | fe39ffb8b90ae4e002ed73fe98617cd590abb467 (patch) | |
| tree | b80e5956907d8aeaaffe4e4f0c068c0e6157ce8b /docs/manual/mod/mod_authn_dbd.html.en | |
| parent | Initial commit. (diff) | |
| download | apache2-fe39ffb8b90ae4e002ed73fe98617cd590abb467.tar.xz apache2-fe39ffb8b90ae4e002ed73fe98617cd590abb467.zip | |
Adding upstream version 2.4.56.upstream/2.4.56
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'docs/manual/mod/mod_authn_dbd.html.en')
| -rw-r--r-- | docs/manual/mod/mod_authn_dbd.html.en | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/docs/manual/mod/mod_authn_dbd.html.en b/docs/manual/mod/mod_authn_dbd.html.en new file mode 100644 index 0000000..fe3a21a --- /dev/null +++ b/docs/manual/mod/mod_authn_dbd.html.en @@ -0,0 +1,231 @@ +<?xml version="1.0" encoding="UTF-8"?> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> +<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head> +<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" /> +<!-- + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + This file is generated from xml source: DO NOT EDIT + XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX + --> +<title>mod_authn_dbd - Apache HTTP Server Version 2.4</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 rel="stylesheet" type="text/css" href="../style/css/prettify.css" /> +<script src="../style/scripts/prettify.min.js" type="text/javascript"> +</script> + +<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="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p> +<p class="apache">Apache HTTP Server Version 2.4</p> +<img alt="" src="../images/feather.png" /></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/">Documentation</a> > <a href="../">Version 2.4</a> > <a href="./">Modules</a></div> +<div id="page-content"> +<div id="preamble"><h1>Apache Module mod_authn_dbd</h1> +<div class="toplang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_authn_dbd.html" title="English"> en </a> | +<a href="../fr/mod/mod_authn_dbd.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p> +</div> +<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>User authentication using an SQL database</td></tr> +<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>authn_dbd_module</td></tr> +<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_authn_dbd.c</td></tr> +<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.1 and later</td></tr></table> +<h3>Summary</h3> + + <p>This module provides authentication front-ends such as + <code class="module"><a href="../mod/mod_auth_digest.html">mod_auth_digest</a></code> and <code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code> + to authenticate users by looking up users in SQL tables. + Similar functionality is provided by, for example, + <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code>.</p> + <p>This module relies on <code class="module"><a href="../mod/mod_dbd.html">mod_dbd</a></code> to specify + the backend database driver and connection parameters, and + manage the database connections.</p> + + <p>When using <code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code> or + <code class="module"><a href="../mod/mod_auth_digest.html">mod_auth_digest</a></code>, this module is invoked via the + <code class="directive"><a href="../mod/mod_auth_basic.html#authbasicprovider">AuthBasicProvider</a></code> or + <code class="directive"><a href="../mod/mod_auth_digest.html#authdigestprovider">AuthDigestProvider</a></code> + with the <code>dbd</code> value.</p> +</div> +<div id="quickview"><a href="https://www.apache.org/foundation/contributing.html" class="badge"><img src="https://www.apache.org/images/SupportApache-small.png" alt="Support Apache!" /></a><h3>Topics</h3> +<ul id="topics"> +<li><img alt="" src="../images/down.gif" /> <a href="#socache">Performance and Caching</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#example">Configuration Example</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#exposed">Exposing Login Information</a></li> +</ul><h3 class="directives">Directives</h3> +<ul id="toc"> +<li><img alt="" src="../images/down.gif" /> <a href="#authdbduserpwquery">AuthDBDUserPWQuery</a></li> +<li><img alt="" src="../images/down.gif" /> <a href="#authdbduserrealmquery">AuthDBDUserRealmQuery</a></li> +</ul> +<h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_authn_dbd">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_authn_dbd">Report a bug</a></li></ul><h3>See also</h3> +<ul class="seealso"> +<li><code class="directive"><a href="../mod/mod_authn_core.html#authname">AuthName</a></code></li> +<li><code class="directive"><a href="../mod/mod_authn_core.html#authtype">AuthType</a></code></li> +<li> + <code class="directive"><a href="../mod/mod_auth_basic.html#authbasicprovider">AuthBasicProvider</a></code> +</li> +<li> + <code class="directive"><a href="../mod/mod_auth_digest.html#authdigestprovider">AuthDigestProvider</a></code> +</li> +<li><code class="directive"><a href="../mod/mod_dbd.html#dbdriver">DBDriver</a></code></li> +<li><code class="directive"><a href="../mod/mod_dbd.html#dbdparams">DBDParams</a></code></li> +<li><a href="../misc/password_encryptions.html">Password Formats</a></li> +<li><a href="#comments_section">Comments</a></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="socache" id="socache">Performance and Caching</a></h2> + +<p>Some users of DBD authentication in HTTPD 2.2/2.4 have reported that it +imposes a problematic load on the database. This is most likely where +an HTML page contains hundreds of objects (e.g. images, scripts, etc) +each of which requires authentication. Users affected (or concerned) +by this kind of problem should use <code class="module"><a href="../mod/mod_authn_socache.html">mod_authn_socache</a></code> +to cache credentials and take most of the load off the database.</p> +</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="example" id="example">Configuration Example</a></h2> + +<p>This simple example shows use of this module in the context of +the Authentication and DBD frameworks.</p> +<pre class="prettyprint lang-config"># mod_dbd configuration +# UPDATED to include authentication caching +DBDriver pgsql +DBDParams "dbname=apacheauth user=apache password=xxxxxx" + +DBDMin 4 +DBDKeep 8 +DBDMax 20 +DBDExptime 300 + +<Directory "/usr/www/myhost/private"> + # mod_authn_core and mod_auth_basic configuration + # for mod_authn_dbd + AuthType Basic + AuthName "My Server" + + # To cache credentials, put socache ahead of dbd here + AuthBasicProvider socache dbd + + # Also required for caching: tell the cache to cache dbd lookups! + AuthnCacheProvideFor dbd + AuthnCacheContext my-server + + # mod_authz_core configuration + Require valid-user + + # mod_authn_dbd SQL query to authenticate a user + AuthDBDUserPWQuery "SELECT password FROM authn WHERE user = %s" +</Directory></pre> + +</div><div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div> +<div class="section"> +<h2><a name="exposed" id="exposed">Exposing Login Information</a></h2> + +<p> +Whenever a query is made to the database server, all +column values in the first row returned by the query are placed in the +environment, using environment variables with the prefix "AUTHENTICATE_". +</p> +<p>If a database query for example returned the username, full name +and telephone number of a user, a CGI program will have access to +this information without the need to make a second independent database +query to gather this additional information.</p> +<p>This has the potential to dramatically simplify the coding and +configuration required in some web applications. +</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="AuthDBDUserPWQuery" id="AuthDBDUserPWQuery">AuthDBDUserPWQuery</a> <a name="authdbduserpwquery" id="authdbduserpwquery">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>SQL query to look up a password for a user</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDBDUserPWQuery <var>query</var></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authn_dbd</td></tr> +</table> + <p>The <code class="directive">AuthDBDUserPWQuery</code> specifies an + SQL query to look up a password for a specified user. The user's ID + will be passed as a single string parameter when the SQL query is + executed. It may be referenced within the query statement using + a <code>%s</code> format specifier.</p> + <pre class="prettyprint lang-config">AuthDBDUserPWQuery "SELECT password FROM authn WHERE user = %s"</pre> + + <p>The first column value of the first row returned by the query + statement should be a string containing the encrypted password. + Subsequent rows will be ignored. If no rows are returned, the user + will not be authenticated through <code class="module"><a href="../mod/mod_authn_dbd.html">mod_authn_dbd</a></code>.</p> + <p>Any additional column values in the first row returned by + the query statement will be stored as environment variables with + names of the form <code>AUTHENTICATE_<var>COLUMN</var></code>. + </p> + <p>The encrypted password format depends on which authentication + frontend (e.g. <code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code> or + <code class="module"><a href="../mod/mod_auth_digest.html">mod_auth_digest</a></code>) is being used. See <a href="../misc/password_encryptions.html">Password Formats</a> for + more information.</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="AuthDBDUserRealmQuery" id="AuthDBDUserRealmQuery">AuthDBDUserRealmQuery</a> <a name="authdbduserrealmquery" id="authdbduserrealmquery">Directive</a></h2> +<table class="directive"> +<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>SQL query to look up a password hash for a user and realm. +</td></tr> +<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthDBDUserRealmQuery <var>query</var></code></td></tr> +<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr> +<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr> +<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_authn_dbd</td></tr> +</table> + <p>The <code class="directive">AuthDBDUserRealmQuery</code> specifies an + SQL query to look up a password for a specified user and realm in a + digest authentication process. + The user's ID and the realm, in that order, will be passed as string + parameters when the SQL query is executed. They may be referenced + within the query statement using <code>%s</code> format specifiers.</p> + <pre class="prettyprint lang-config">AuthDBDUserRealmQuery "SELECT password FROM authn WHERE user = %s AND realm = %s"</pre> + + <p>The first column value of the first row returned by the query + statement should be a string containing the encrypted password. + Subsequent rows will be ignored. If no rows are returned, the user + will not be authenticated through <code class="module"><a href="../mod/mod_authn_dbd.html">mod_authn_dbd</a></code>.</p> + <p>Any additional column values in the first row returned by + the query statement will be stored as environment variables with + names of the form <code>AUTHENTICATE_<var>COLUMN</var></code>. + </p> + <p>The encrypted password format depends on which authentication + frontend (e.g. <code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code> or + <code class="module"><a href="../mod/mod_auth_digest.html">mod_auth_digest</a></code>) is being used. See <a href="../misc/password_encryptions.html">Password Formats</a> for + more information.</p> + +</div> +</div> +<div class="bottomlang"> +<p><span>Available Languages: </span><a href="../en/mod/mod_authn_dbd.html" title="English"> en </a> | +<a href="../fr/mod/mod_authn_dbd.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p> +</div><div class="top"><a href="#page-header"><img src="../images/up.gif" alt="top" /></a></div><div class="section"><h2><a id="comments_section" name="comments_section">Comments</a></h2><div class="warning"><strong>Notice:</strong><br />This is not a Q&A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed by our moderators if they are either implemented or considered invalid/off-topic. Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Libera.chat, or sent to our <a href="https://httpd.apache.org/lists.html">mailing lists</a>.</div> +<script type="text/javascript"><!--//--><![CDATA[//><!-- +var comments_shortname = 'httpd'; +var comments_identifier = 'http://httpd.apache.org/docs/2.4/mod/mod_authn_dbd.html'; +(function(w, d) { + if (w.location.hostname.toLowerCase() == "httpd.apache.org") { + d.write('<div id="comments_thread"><\/div>'); + var s = d.createElement('script'); + s.type = 'text/javascript'; + s.async = true; + s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier; + (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s); + } + else { + d.write('<div id="comments_thread">Comments are disabled for this page at the moment.<\/div>'); + } +})(window, document); +//--><!]]></script></div><div id="footer"> +<p class="apache">Copyright 2023 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="http://wiki.apache.org/httpd/FAQ">FAQ</a> | <a href="../glossary.html">Glossary</a> | <a href="../sitemap.html">Sitemap</a></p></div><script type="text/javascript"><!--//--><![CDATA[//><!-- +if (typeof(prettyPrint) !== 'undefined') { + prettyPrint(); +} +//--><!]]></script> +</body></html>
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