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+<a href="http://www.apache.org/">Apache</a> &gt; <a href="http://httpd.apache.org/">HTTP Server</a> &gt; <a href="http://httpd.apache.org/docs/">Documentation</a> &gt; <a href="../">Version 2.4</a> &gt; <a href="./">Modules</a></div>
+<div id="page-content">
+<div id="preamble"><h1>Apache Module mod_auth_basic</h1>
+<div class="toplang">
+<p><span>Available Languages: </span><a href="../en/mod/mod_auth_basic.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/mod/mod_auth_basic.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
+<a href="../ja/mod/mod_auth_basic.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a> |
+<a href="../ko/mod/mod_auth_basic.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</a></p>
+</div>
+<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Basic HTTP authentication</td></tr>
+<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Base</td></tr>
+<tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>auth_basic_module</td></tr>
+<tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_auth_basic.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 allows the use of HTTP Basic Authentication to
+ restrict access by looking up users in the given providers.
+ HTTP Digest Authentication is provided by
+ <code class="module"><a href="../mod/mod_auth_digest.html">mod_auth_digest</a></code>. This module should
+ usually be combined with at least one authentication module
+ such as <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code> and one authorization
+ module such as <code class="module"><a href="../mod/mod_authz_user.html">mod_authz_user</a></code>.</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 class="directives">Directives</h3>
+<ul id="toc">
+<li><img alt="" src="../images/down.gif" /> <a href="#authbasicauthoritative">AuthBasicAuthoritative</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#authbasicfake">AuthBasicFake</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#authbasicprovider">AuthBasicProvider</a></li>
+<li><img alt="" src="../images/down.gif" /> <a href="#authbasicusedigestalgorithm">AuthBasicUseDigestAlgorithm</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__&amp;list_id=144532&amp;product=Apache%20httpd-2&amp;query_format=specific&amp;order=changeddate%20DESC%2Cpriority%2Cbug_severity&amp;component=mod_auth_basic">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&amp;component=mod_auth_basic">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_authz_core.html#require">Require</a></code></li>
+<li><a href="../howto/auth.html">Authentication howto</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="directive-section"><h2><a name="AuthBasicAuthoritative" id="AuthBasicAuthoritative">AuthBasicAuthoritative</a> <a name="authbasicauthoritative" id="authbasicauthoritative">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Sets whether authorization and authentication are passed to
+lower level modules</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthBasicAuthoritative On|Off</code></td></tr>
+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthBasicAuthoritative 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>Base</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_basic</td></tr>
+</table>
+ <p>Normally, each authorization module listed in <code class="directive"><a href="#authbasicprovider">AuthBasicProvider</a></code> will attempt
+ to verify the user, and if the user is not found in any provider,
+ access will be denied. Setting the
+ <code class="directive">AuthBasicAuthoritative</code> directive explicitly
+ to <code>Off</code> allows for both authentication and
+ authorization to be passed on to other non-provider-based modules
+ if there is <strong>no userID</strong> or <strong>rule</strong>
+ matching the supplied userID. This should only be necessary when
+ combining <code class="module"><a href="../mod/mod_auth_basic.html">mod_auth_basic</a></code> with third-party modules
+ that are not configured with the <code class="directive"><a href="#authbasicprovider">AuthBasicProvider</a></code>
+ directive. When using such modules, the order of processing
+ is determined in the modules' source code and is not configurable.</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="AuthBasicFake" id="AuthBasicFake">AuthBasicFake</a> <a name="authbasicfake" id="authbasicfake">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Fake basic authentication using the given expressions for
+username and password</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthBasicFake off|<var>username</var> [<var>password</var>]</code></td></tr>
+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>none</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>Base</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_basic</td></tr>
+<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Apache HTTP Server 2.4.5 and later</td></tr>
+</table>
+ <p>The username and password specified are combined into an
+ Authorization header, which is passed to the server or service
+ behind the webserver. Both the username and password fields are
+ interpreted using the <a href="../expr.html">expression parser</a>,
+ which allows both the username and password to be set based on
+ request parameters.</p>
+
+ <p>If the password is not specified, the default value "password"
+ will be used. To disable fake basic authentication for an URL
+ space, specify "AuthBasicFake off".</p>
+
+ <p>In this example, we pass a fixed username and password to a
+ backend server.</p>
+
+ <div class="example"><h3>Fixed Example</h3><pre class="prettyprint lang-config">&lt;Location "/demo"&gt;
+ AuthBasicFake demo demopass
+&lt;/Location&gt;</pre>
+</div>
+
+ <p>In this example, we pass the email address extracted from a client
+ certificate, extending the functionality of the FakeBasicAuth option
+ within the <code class="directive"><a href="../mod/mod_ssl.html#ssloptions">SSLOptions</a></code>
+ directive. Like the FakeBasicAuth option, the password is set to the
+ fixed string "password".</p>
+
+ <div class="example"><h3>Certificate Example</h3><pre class="prettyprint lang-config">&lt;Location "/secure"&gt;
+ AuthBasicFake "%{SSL_CLIENT_S_DN_Email}"
+&lt;/Location&gt;</pre>
+</div>
+
+ <p>Extending the above example, we generate a password by hashing the
+ email address with a fixed passphrase, and passing the hash to the
+ backend server. This can be used to gate into legacy systems that do
+ not support client certificates.</p>
+
+ <div class="example"><h3>Password Example</h3><pre class="prettyprint lang-config">&lt;Location "/secure"&gt;
+ AuthBasicFake "%{SSL_CLIENT_S_DN_Email}" "%{sha1:passphrase-%{SSL_CLIENT_S_DN_Email}}"
+&lt;/Location&gt;</pre>
+</div>
+
+ <div class="example"><h3>Exclusion Example</h3><pre class="prettyprint lang-config">&lt;Location "/public"&gt;
+ AuthBasicFake off
+&lt;/Location&gt;</pre>
+</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="AuthBasicProvider" id="AuthBasicProvider">AuthBasicProvider</a> <a name="authbasicprovider" id="authbasicprovider">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>AuthBasicProvider <var>provider-name</var>
+[<var>provider-name</var>] ...</code></td></tr>
+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthBasicProvider file</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>Base</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_basic</td></tr>
+</table>
+ <p>The <code class="directive">AuthBasicProvider</code> directive sets
+ which provider is used to authenticate the users for this location.
+ The default <code>file</code> provider is implemented
+ by the <code class="module"><a href="../mod/mod_authn_file.html">mod_authn_file</a></code> module. Make sure
+ that the chosen provider module is present in the server.</p>
+ <div class="example"><h3>Example</h3><pre class="prettyprint lang-config">&lt;Location "/secure"&gt;
+ AuthType basic
+ AuthName "private area"
+ AuthBasicProvider dbm
+ AuthDBMType SDBM
+ AuthDBMUserFile "/www/etc/dbmpasswd"
+ Require valid-user
+&lt;/Location&gt;</pre>
+</div>
+ <p> Providers are queried in order until a provider finds a match
+ for the requested username, at which point this sole provider will
+ attempt to check the password. A failure to verify the password does
+ not result in control being passed on to subsequent providers.</p>
+
+ <p>Providers are implemented by <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>, <code class="module"><a href="../mod/mod_authn_dbd.html">mod_authn_dbd</a></code>,
+ <code class="module"><a href="../mod/mod_authnz_ldap.html">mod_authnz_ldap</a></code> and <code class="module"><a href="../mod/mod_authn_socache.html">mod_authn_socache</a></code>.</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="AuthBasicUseDigestAlgorithm" id="AuthBasicUseDigestAlgorithm">AuthBasicUseDigestAlgorithm</a> <a name="authbasicusedigestalgorithm" id="authbasicusedigestalgorithm">Directive</a></h2>
+<table class="directive">
+<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Check passwords against the authentication providers as if
+Digest Authentication was in force instead of Basic Authentication.
+</td></tr>
+<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>AuthBasicUseDigestAlgorithm MD5|Off</code></td></tr>
+<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AuthBasicUseDigestAlgorithm Off</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>Base</td></tr>
+<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_auth_basic</td></tr>
+<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Apache HTTP Server 2.4.7 and later</td></tr>
+</table>
+ <p>Normally, when using Basic Authentication, the providers listed in
+ <code class="directive"><a href="#authbasicprovider">AuthBasicProvider</a></code>
+ attempt to verify a user by checking their data stores for
+ a matching username and associated password. The stored passwords
+ are usually encrypted, but not necessarily so; each provider may
+ choose its own storage scheme for passwords.</p>
+
+ <p>When using <code class="directive"><a href="../mod/mod_auth_digest.html#authdigestprovider">AuthDigestProvider</a></code> and Digest
+ Authentication, providers perform a similar check to find a matching
+ username in their data stores. However, unlike in the Basic
+ Authentication case, the value associated with each stored username
+ must be an encrypted string composed from the username, realm name,
+ and password. (See
+ <a href="http://tools.ietf.org/html/rfc2617#section-3.2.2.2">
+ RFC 2617, Section 3.2.2.2</a> for more details on the format used
+ for this encrypted string.)</p>
+
+ <p>As a consequence of the difference in the stored values between
+ Basic and Digest Authentication, converting from Digest
+ Authentication to Basic Authentication generally requires that all
+ users be assigned new passwords, as their existing passwords cannot
+ be recovered from the password storage scheme imposed on those
+ providers which support Digest Authentication.</p>
+
+ <p>Setting the <code class="directive">AuthBasicUseDigestAlgorithm</code> directive
+ to <code>MD5</code> will cause the user's Basic Authentication password
+ to be checked using the same encrypted format as for Digest
+ Authentication. First a string composed from the username, realm name,
+ and password is hashed with MD5; then the username and this encrypted
+ string are passed to the providers listed in
+ <code class="directive"><a href="#authbasicprovider">AuthBasicProvider</a></code>
+ as if
+ <code class="directive"><a href="../mod/mod_authn_core.html#authtype">AuthType</a></code>
+ was set to <code>Digest</code> and Digest Authentication was in force.
+ </p>
+
+ <p>Through the use of <code class="directive">AuthBasicUseDigestAlgorithm</code>
+ a site may switch from Digest to Basic Authentication without
+ requiring users to be assigned new passwords.</p>
+
+ <div class="note">
+ The inverse process of switching from Basic to Digest
+ Authentication without assigning new passwords is generally
+ not possible. Only if the Basic Authentication passwords
+ have been stored in plain text or with a reversable encryption
+ scheme will it be possible to recover them and generate a
+ new data store following the Digest Authentication password
+ storage scheme.
+ </div>
+
+ <div class="note">
+ Only providers which support Digest Authentication will be able
+ to authenticate users when <code class="directive">AuthBasicUseDigestAlgorithm</code>
+ is set to <code>MD5</code>. Use of other providers will result
+ in an error response and the client will be denied access.
+ </div>
+
+</div>
+</div>
+<div class="bottomlang">
+<p><span>Available Languages: </span><a href="../en/mod/mod_auth_basic.html" title="English">&nbsp;en&nbsp;</a> |
+<a href="../fr/mod/mod_auth_basic.html" hreflang="fr" rel="alternate" title="Français">&nbsp;fr&nbsp;</a> |
+<a href="../ja/mod/mod_auth_basic.html" hreflang="ja" rel="alternate" title="Japanese">&nbsp;ja&nbsp;</a> |
+<a href="../ko/mod/mod_auth_basic.html" hreflang="ko" rel="alternate" title="Korean">&nbsp;ko&nbsp;</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&amp;A section. Comments placed here should be pointed towards suggestions on improving the documentation or server, and may be removed again 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 Freenode, or sent to our <a href="http://httpd.apache.org/lists.html">mailing lists</a>.</div>
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