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178 lines
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<?xml version="1.0" encoding="ISO-8859-1"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"><head><!--
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XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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This file is generated from xml source: DO NOT EDIT
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-->
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<title>mod_session_crypto - Apache HTTP Server</title>
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<link href="../style/css/manual.css" rel="stylesheet" media="all" type="text/css" title="Main stylesheet" />
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<link href="../style/css/manual-loose-100pc.css" rel="alternate stylesheet" media="all" type="text/css" title="No Sidebar - Default font size" />
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<link href="../style/css/manual-print.css" rel="stylesheet" media="print" type="text/css" />
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<link href="../images/favicon.ico" rel="shortcut icon" /></head>
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<body>
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<div id="page-header">
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<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>
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<p class="apache">Apache HTTP Server Version 2.3</p>
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<img alt="" src="../images/feather.gif" /></div>
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<div class="up"><a href="./"><img title="<-" alt="<-" src="../images/left.gif" /></a></div>
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<div id="path">
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<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 2.3</a> > <a href="./">Modules</a></div>
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<div id="page-content">
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<div id="preamble"><h1>Apache Module mod_session_crypto</h1>
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<div class="toplang">
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<p><span>Available Languages: </span><a href="../en/mod/mod_session_crypto.html" title="English"> en </a></p>
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</div>
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<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Session encryption support</td></tr>
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<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="module-dict.html#ModuleIdentifier">Module<EFBFBD>Identifier:</a></th><td>session_crypto_module</td></tr>
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<tr><th><a href="module-dict.html#SourceFile">Source<EFBFBD>File:</a></th><td>mod_session_crypto.c</td></tr>
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<tr><th><a href="module-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3 and later</td></tr></table>
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<h3>Summary</h3>
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<div class="warning"><h3>Warning</h3>
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<p>The session modules make use of HTTP cookies, and as such can fall
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victim to Cross Site Scripting attacks, or expose potentially private
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information to clients. Please ensure that the relevant risks have
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been taken into account before enabling the session functionality on
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your server.</p>
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</div>
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<p>This submodule of <code class="module"><a href="../mod/mod_session.html">mod_session</a></code> provides support for the
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encryption of user sessions before being written to a local database, or
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written to a remote browser via an HTTP cookie.</p>
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<p>This can help provide privacy to user sessions where the contents of
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the session should be kept private from the user, or where protection is
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needed against the effects of cross site scripting attacks.</p>
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<p>For more details on the session interface, see the documentation for
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the <code class="module"><a href="../mod/mod_session.html">mod_session</a></code> module.</p>
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</div>
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<div id="quickview"><h3 class="directives">Directives</h3>
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<ul id="toc">
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<li><img alt="" src="../images/down.gif" /> <a href="#sessioncryptodriver">SessionCryptoDriver</a></li>
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<li><img alt="" src="../images/down.gif" /> <a href="#sessioncryptopassphrase">SessionCryptoPassphrase</a></li>
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</ul>
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<h3>Topics</h3>
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<ul id="topics">
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<li><img alt="" src="../images/down.gif" /> <a href="#basicusage">Basic Usage</a></li>
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</ul><h3>See also</h3>
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<ul class="seealso">
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<li><code class="module"><a href="../mod/mod_session.html">mod_session</a></code></li>
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<li><code class="module"><a href="../mod/mod_session_cookie.html">mod_session_cookie</a></code></li>
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<li><code class="module"><a href="../mod/mod_session_dbd.html">mod_session_dbd</a></code></li>
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</ul></div>
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="section">
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<h2><a name="basicusage" id="basicusage">Basic Usage</a></h2>
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<p>To create a simple encrypted session and store it in a cookie called
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<var>session</var>, configure the session as follows:</p>
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<div class="example"><h3>Browser based encrypted session</h3><p><code>
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Session On<br />
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SessionCookieName session path=/<br />
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SessionCryptoPassphrase secret
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</code></p></div>
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<p>The session will be encrypted with the given key. Different servers can
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be configured to share sessions by ensuring the same encryption key is used
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on each server.</p>
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<p>If the encryption key is changed, sessions will be invalidated
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automatically.</p>
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<p>For documentation on how the session can be used to store username
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and password details, see the <code class="module"><a href="../mod/mod_auth_form.html">mod_auth_form</a></code> module.</p>
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</div>
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="SessionCryptoDriver" id="SessionCryptoDriver">SessionCryptoDriver</a> <a name="sessioncryptodriver" id="sessioncryptodriver">Directive</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The crypto driver to be used to encrypt the session</td></tr>
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionCryptoDriver <var>name</var> <var>[param[=value]]</var></code></td></tr>
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<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>none</code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_crypto</td></tr>
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<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3.0 and later</td></tr>
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</table>
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<p>The <code class="directive">SessionCryptoDriver</code> directive specifies the name of
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the crypto driver to be used for encryption. If not specified, the driver defaults
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to the recommended driver compiled into APR-util.</p>
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<p>The <var>NSS</var> crypto driver requires some parameters for configuration,
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which are specified as parameters with optional values after the driver name.</p>
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<div class="example"><h3>NSS without a certificate database</h3><p><code>
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SessionCryptoDriver nss
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</code></p></div>
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<div class="example"><h3>NSS with certificate database</h3><p><code>
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SessionCryptoDriver nss dir=certs
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</code></p></div>
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<div class="example"><h3>NSS with certificate database and parameters</h3><p><code>
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SessionCryptoDriver nss dir=certs key3=key3.db cert7=cert7.db secmod=secmod
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</code></p></div>
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<p>The <var>NSS</var> crypto driver might have already been configured by another
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part of the server, for example from <code class="module"><a href="../mod/mod_nss.html">mod_nss</a></code> or
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<code class="module"><a href="../mod/mod_ldap.html">mod_ldap</a></code>. If found to have already been configured,
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a warning will be logged, and the existing configuration will have taken affect.
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To avoid this warning, use the noinit parameter as follows.</p>
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<div class="example"><h3>NSS with certificate database</h3><p><code>
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SessionCryptoDriver nss noinit
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</code></p></div>
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<p>To prevent confusion, ensure that all modules requiring NSS are configured with
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identical parameters.</p>
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</div>
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<div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
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<div class="directive-section"><h2><a name="SessionCryptoPassphrase" id="SessionCryptoPassphrase">SessionCryptoPassphrase</a> <a name="sessioncryptopassphrase" id="sessioncryptopassphrase">Directive</a></h2>
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<table class="directive">
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<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The key used to encrypt the session</td></tr>
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<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionCryptoPassphrase <var>secret</var></code></td></tr>
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<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>none</code></td></tr>
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<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host, directory, .htaccess</td></tr>
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<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
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<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_crypto</td></tr>
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<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3.0 and later</td></tr>
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</table>
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<p>The <code class="directive">SessionCryptoPassphrase</code> directive specifies the key
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to be used to enable symmetrical encryption on the contents of the session before
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writing the session, or decrypting the contents of the session after reading the
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session.</p>
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<p>Keys are more secure when they are long, and consist of truly random characters.
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Changing the key on a server has the effect of invalidating all existing sessions.</p>
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<p>The cipher can be set to <var>3des192</var> or <var>aes256</var> using the
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<var>cipher</var> parameter as per the example below. If not set, the cipher defaults
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to <var>aes256</var>.</p>
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<div class="example"><h3>Cipher</h3><p><code>
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SessionCryptoPassphrase secret cipher=aes256
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</code></p></div>
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<p>The <var>openssl</var> crypto driver supports an optional parameter to specify
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the engine to be used for encryption.</p>
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<div class="example"><h3>OpenSSL with engine support</h3><p><code>
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SessionCryptoPassphrase secret engine=name
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</code></p></div>
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</div>
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</div>
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<div class="bottomlang">
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<p><span>Available Languages: </span><a href="../en/mod/mod_session_crypto.html" title="English"> en </a></p>
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</div><div id="footer">
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<p class="apache">Copyright 2010 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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<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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</body></html> |