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4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<title>mod_session_crypto - Apache HTTP Server</title>
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4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<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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4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<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>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<div id="preamble"><h1>Apache Module mod_session_crypto</h1>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<p><span>Available Languages: </span><a href="/en/mod/mod_session_crypto.html" title="English"> en </a></p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Session encryption support</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="module-dict.html#ModuleIdentifier">Module�Identifier:</a></th><td>session_crypto_module</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="module-dict.html#SourceFile">Source�File:</a></th><td>mod_session_crypto.c</td></tr></table>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <p>The session modules make use of HTTP cookies, and as such can fall
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin victim to Cross Site Scripting attacks, or expose potentially private
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin information to clients. Please ensure that the relevant risks have
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin been taken into account before enabling the session functionality on
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin your server.</p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <p>This submodule of <code class="module"><a href="/mod/mod_session.html">mod_session</a></code> provides support for the
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin encryption of user sessions before being written to a local database, or
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin written to a remove browser via an HTTP cookie.</p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <p>This can help provide privacy to user sessions where the contents of
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin the session should be kept private from the user, or where protection is
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin needed against the effects of cross site scripting attacks.</p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <p>For more details on the session interface, see the documentation for
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin the <code class="module"><a href="/mod/mod_session.html">mod_session</a></code> module.</p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<div id="quickview"><h3 class="directives">Directives</h3>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<li><img alt="" src="/images/down.gif" /> <a href="#sessioncryptocertificatefile">SessionCryptoCertificateFile</a></li>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<li><img alt="" src="/images/down.gif" /> <a href="#sessioncryptocertificatekeyfile">SessionCryptoCertificateKeyFile</a></li>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<li><img alt="" src="/images/down.gif" /> <a href="#sessioncryptocipher">SessionCryptoCipher</a></li>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<li><img alt="" src="/images/down.gif" /> <a href="#sessioncryptodigest">SessionCryptoDigest</a></li>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<li><img alt="" src="/images/down.gif" /> <a href="#sessioncryptoengine">SessionCryptoEngine</a></li>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<li><img alt="" src="/images/down.gif" /> <a href="#sessioncryptopassphrase">SessionCryptoPassphrase</a></li>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<li><img alt="" src="/images/down.gif" /> <a href="#basicusage">Basic Usage</a></li>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<li><code class="module"><a href="/mod/mod_session.html">mod_session</a></code></li>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<li><code class="module"><a href="/mod/mod_session_cookie.html">mod_session_cookie</a></code></li>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<li><code class="module"><a href="/mod/mod_session_dbd.html">mod_session_dbd</a></code></li>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<h2><a name="basicusage" id="basicusage">Basic Usage</a></h2>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <p>To create a simple encrypted session and store it in a cookie called
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <var>session</var>, configure the session as follows:</p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <div class="example"><h3>Browser based encrypted session</h3><p><code>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin Session On<br />
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin SessionCookieName session path=/<br />
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin SessionCryptoPassphrase secret
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <p>The session will be encrypted with the given key. Different servers can
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin be configured to share sessions by ensuring the same encryption key is used
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin on each server.</p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <p>If the encryption key is changed, sessions will be invalidated
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin automatically.</p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <p>For documentation on how the session can be used to store username
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin and password details, see the <code class="module"><a href="/mod/mod_auth_form.html">mod_auth_form</a></code> module.</p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<div class="directive-section"><h2><a name="SessionCryptoCertificateFile" id="SessionCryptoCertificateFile">SessionCryptoCertificateFile</a> <a name="sessioncryptocertificatefile" id="sessioncryptocertificatefile">Directive</a></h2>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The certificate used to encrypt and decrypt the session</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionCryptoCertificateFile <var>file</var></code></td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>none</code></td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_crypto</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3.0 and later</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <p>The <code class="directive">SessionCryptoCertificateFile</code> directive specifies the name
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin of a certificate to be used to encrypt the contents of the session before writing
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin the session, or decrypting the content of the session after reading the session.</p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <p>Changing the certificate on a server has the effect of invalidating all existing
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin sessions.</p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <p>This directive is dependent on experimental support for assymetrical encryption
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin support currently available in prerelease versions of OpenSSL, and will only be
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin available on platforms that support it.</p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<div class="directive-section"><h2><a name="SessionCryptoCertificateKeyFile" id="SessionCryptoCertificateKeyFile">SessionCryptoCertificateKeyFile</a> <a name="sessioncryptocertificatekeyfile" id="sessioncryptocertificatekeyfile">Directive</a></h2>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The certificate key used to encrypt and decrypt the session</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionCryptoCertificateKeyFile <var>file</var></code></td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>none</code></td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_crypto</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3.0 and later</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <p>The <code class="directive">SessionCryptoCertificateKeyFile</code> directive specifies the name
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin of a certificate key to be used alongside a certificate to encrypt the contents of the
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin session before writing the session, or decrypting the content of the session after reading
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin the session.</p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <p>Changing the certificate or key on a server has the effect of invalidating all existing
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin sessions.</p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <p>This directive is dependent on experimental support for asymmetrical encryption
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin support currently available in prerelease versions of OpenSSL, and will only be
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin available on platforms that support it.</p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<div class="directive-section"><h2><a name="SessionCryptoCipher" id="SessionCryptoCipher">SessionCryptoCipher</a> <a name="sessioncryptocipher" id="sessioncryptocipher">Directive</a></h2>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The name of the cipher to use during encryption / decryption</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionCryptoCipher <var>cipher</var></code></td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>AES256</code></td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_crypto</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3.0 and later</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <p>The <code class="directive">SessionCryptoCipher</code> directive specifies the name
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin of the cipher to use during encryption. The ciphers available will depend on the
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin underlying encryption toolkit on the server platform.</p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<div class="directive-section"><h2><a name="SessionCryptoDigest" id="SessionCryptoDigest">SessionCryptoDigest</a> <a name="sessioncryptodigest" id="sessioncryptodigest">Directive</a></h2>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The name of the digest to use during encryption / decryption</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionCryptoDigest <var>cipher</var></code></td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>SHA</code></td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_crypto</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3.0 and later</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <p>The <code class="directive">SessionCryptoDigest</code> directive specifies the name
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin of the digest to use during encryption. The list of digests available will depend
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin on the underlying encryption toolkit on the server platform.</p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<div class="directive-section"><h2><a name="SessionCryptoEngine" id="SessionCryptoEngine">SessionCryptoEngine</a> <a name="sessioncryptoengine" id="sessioncryptoengine">Directive</a></h2>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The name of the engine to use during encryption / decryption</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionCryptoEngine <var>engine</var></code></td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>none</code></td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_crypto</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3.0 and later</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <p>The <code class="directive">SessionCryptoEngine</code> directive specifies the name
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin of the engine to use during encryption, depending on the capabilities of the
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin underlying encryption toolkit on the server platform.</p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<div class="top"><a href="#page-header"><img alt="top" src="/images/up.gif" /></a></div>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<div class="directive-section"><h2><a name="SessionCryptoPassphrase" id="SessionCryptoPassphrase">SessionCryptoPassphrase</a> <a name="sessioncryptopassphrase" id="sessioncryptopassphrase">Directive</a></h2>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Description">Description:</a></th><td>The key used to encrypt the session</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>SessionCryptoPassphrase <var>secret</var></code></td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>none</code></td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Context">Context:</a></th><td>directory</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_session_crypto</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Available in Apache 2.3.0 and later</td></tr>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <p>The <code class="directive">SessionCryptoPassphrase</code> directive specifies the key
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin to be used to encrypt the contents of the session before writing the session, or
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin decrypting the contents of the session after reading the session.</p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin <p>Keys are more secure when they are long, and consist of truly random characters.
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin Changing the key on a server has the effect of invalidating all existing sessions.</p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<p><span>Available Languages: </span><a href="/en/mod/mod_session_crypto.html" title="English"> en </a></p>
4277c95b5a9454a5c25f8d8762634fcff37aa840minfrin<p class="apache">Copyright 2008 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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