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+<html><head><META http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><title>Catalina Functional Specifications (6.0.39) - MemoryRealm</title><meta name="author" content="Craig McClanahan"><style type="text/css" media="print">
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+ </style></head><body bgcolor="#ffffff" text="#000000" link="#525D76" alink="#525D76" vlink="#525D76"><table border="0" width="100%" cellspacing="0"><!--PAGE HEADER--><tr><td><!--PROJECT LOGO--><a href="http://tomcat.apache.org/"><img src="../images/tomcat.gif" align="right" alt="
+ Catalina Functional Specifications
+ " border="0"></a></td><td><h1><font face="arial,helvetica,sanserif">Apache Tomcat 6.0</font></h1><font face="arial,helvetica,sanserif">Version 6.0.39, Jan 27 2014</font></td><td><!--APACHE LOGO--><a href="http://www.apache.org/"><img src="../images/asf-logo.gif" align="right" alt="Apache Logo" border="0"></a></td></tr></table><table border="0" width="100%" cellspacing="4"><!--HEADER SEPARATOR--><tr><td colspan="2"><hr noshade="noshade" size="1"></td></tr><tr><!--LEFT SIDE NAVIGATION--><td width="20%" valign="top" nowrap="nowrap" class="noPrint"><p><strong>Links</strong></p><ul><li><a href="../index.html">Docs Home</a></li><li><a href="index.html">Functional Specs</a></li></ul><p><strong>Administrative Apps</strong></p><ul><li><a href="fs-admin-apps.html">Overall Requirements</a></li><li><a href="mbean-names.html">Tomcat MBean Names</a></li><li><a href="fs-admin-objects.html">Administered Objects</a></li><li><a href="fs-admin-opers.html">Supported Operations</a></li></ul><p><strong>Internal Servlets</strong></p><ul><li><a href="fs-default.html">Default Servlet</a></li><li><a href="fs-invoker.html">Invoker Servlet</a></li></ul><p><strong>Realm Implementations</strong></p><ul><li><a href="fs-jdbc-realm.html">JDBC Realm</a></li><li><a href="fs-jndi-realm.html">JNDI Realm</a></li><li><a href="fs-memory-realm.html">Memory Realm</a></li></ul></td><!--RIGHT SIDE MAIN BODY--><td width="80%" valign="top" align="left" id="mainBody"><h1>Catalina Functional Specifications</h1><h2>MemoryRealm</h2><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Table of Contents"><!--()--></a><a name="Table_of_Contents"><strong>Table of Contents</strong></a></font></td></tr><tr><td><blockquote>
+<ul><li><a href="#Overview">Overview</a><ol><li><a href="#Introduction">Introduction</a></li><li><a href="#External_Specifications">External Specifications</a></li><li><a href="#Implementation_Requirements">Implementation Requirements</a></li></ol></li><li><a href="#Dependencies">Dependencies</a><ol><li><a href="#Environmental_Dependencies">Environmental Dependencies</a></li><li><a href="#Container_Dependencies">Container Dependencies</a></li></ol></li><li><a href="#Functionality">Functionality</a><ol><li><a href="#Overview_of_Operation">Overview of Operation</a></li><li><a href="#Detailed_Functional_Requirements">Detailed Functional Requirements</a></li></ol></li><li><a href="#Testable_Assertions">Testable Assertions</a></li></ul>
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Overview"><strong>Overview</strong></a></font></td></tr><tr><td><blockquote>
+
+
+ <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Introduction"><strong>Introduction</strong></a></font></td></tr><tr><td><blockquote>
+
+ <p>The purpose of the <strong>MemoryRealm</strong> implementation is to
+ provide a mechanism by which Tomcat 6 can acquire information needed
+ to authenticate web application users, and define their security roles,
+ from a simple text-based configuration file in XML format. This is
+ intended to simplify the initial installation and operation of Tomcat 6,
+ without the complexity of configuring a database or directory server
+ based Realm. It is not intended for production use.</p>
+
+ <p>This specification reflects a combination of functionality that is
+ already present in the <code>org.apache.catalina.realm.MemoryRealm</code>
+ class, as well as requirements for enhancements that have been
+ discussed. Where appropriate, requirements statements are marked
+ <em>[Current]</em> and <em>[Requested]</em> to distinguish them.</p>
+
+ <p>The current status of this functional specification is
+ <strong>PROPOSED</strong>. It has not yet been discussed and
+ agreed to on the TOMCAT-DEV mailing list.</p>
+
+ </blockquote></td></tr></table>
+
+
+ <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="External Specifications"><!--()--></a><a name="External_Specifications"><strong>External Specifications</strong></a></font></td></tr><tr><td><blockquote>
+
+ <p>The implementation of this functionality depends on the following
+ external specifications:</p>
+ <ul>
+ <li>None</li>
+ </ul>
+
+ </blockquote></td></tr></table>
+
+
+ <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Implementation Requirements"><!--()--></a><a name="Implementation_Requirements"><strong>Implementation Requirements</strong></a></font></td></tr><tr><td><blockquote>
+
+ <p>The implementation of this functionality shall conform to the
+ following requirements:</p>
+ <ul>
+ <li>Be realized in one or more implementation classes.</li>
+ <li>Implement the <code>org.apache.catalina.Realm</code> interface.
+ [Current]</li>
+ <li>Implement the <code>org.apache.catalina.Lifecycle</code>
+ interface. [Current]</li>
+ <li>Subclass the <code>org.apache.catalina.realm.RealmBase</code>
+ base class.</li>
+ <li>Live in the <code>org.apache.catalina.realm</code> package.
+ [Current]</li>
+ <li>Support a configurable debugging detail level. [Current]</li>
+ <li>Log debugging and operational messages (suitably internationalized)
+ via the <code>getContainer().log()</code> method. [Current]</li>
+ </ul>
+
+ </blockquote></td></tr></table>
+
+
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Dependencies"><strong>Dependencies</strong></a></font></td></tr><tr><td><blockquote>
+
+
+ <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Environmental Dependencies"><!--()--></a><a name="Environmental_Dependencies"><strong>Environmental Dependencies</strong></a></font></td></tr><tr><td><blockquote>
+
+ <p>The following environmental dependencies must be met in order for
+ MemoryRealm to operate correctly:</p>
+ <ul>
+ <li>The desire to utilize MemoryRealm must be registered in
+ <code>$CATALINA_BASE/conf/server.xml</code>, in a
+ <code><Realm></code> element that is nested inside a
+ corresponding <code><Engine></code>, <code><Host></code>,
+ or <code><Context></code> element. (This is already
+ included in the default <code>server.xml</code> file.)</li>
+ </ul>
+
+ </blockquote></td></tr></table>
+
+
+ <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Container Dependencies"><!--()--></a><a name="Container_Dependencies"><strong>Container Dependencies</strong></a></font></td></tr><tr><td><blockquote>
+
+ <p>Correct operation of MemoryRealm depends on the following
+ specific features of the surrounding container:</p>
+ <ul>
+ <li>Interactions with <code>MemoryRealm</code> will be initiated by
+ the appropriate <code>Authenticator</code> implementation, based
+ on the login method that is selected.</li>
+ <li><code>MemoryRealm</code> must have an XML parser compatible with
+ the JAXP/1.1 APIs available to it. This is normally accomplished
+ by placing the corresponding JAR files in directory
+ <code>$CATALINA_HOME/lib</code>.</li>
+ </ul>
+
+ </blockquote></td></tr></table>
+
+
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Functionality"><strong>Functionality</strong></a></font></td></tr><tr><td><blockquote>
+
+
+ <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Overview of Operation"><!--()--></a><a name="Overview_of_Operation"><strong>Overview of Operation</strong></a></font></td></tr><tr><td><blockquote>
+
+ <p>The main purpose of <code>MemoryRealm</code> is to allow Catalina to
+ authenticate users, and look up the corresponding security roles, from
+ the information found in an XML-format configuration file. The format
+ of this file is described below. When a <code>MemoryRealm</code>
+ instance is started, it will read the contents of this XML file and create
+ an "in memory database" of all the valid users and their associated
+ security roles.</p>
+
+ <p>Each time that Catalina needs to authenticate a user, it will call
+ the <code>authenticate()</code> method of this Realm implementation,
+ passing the username and password that were specified by the user. If
+ we find the user in the database (and match on the password), we accumulate
+ all of the security roles that are defined for this user, and create a
+ new <code>GenericPrincipal</code> object to be returned. If the user
+ is not authenticated, we return <code>null</code> instead. The
+ <code>GenericUser</code> object caches the set of security roles that
+ were owned by this user at the time of authentication, so that calls to
+ <code>isUserInRole()</code> can be answered without going back to the
+ database every time.</p>
+
+ </blockquote></td></tr></table>
+
+
+ <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Detailed Functional Requirements"><!--()--></a><a name="Detailed_Functional_Requirements"><strong>Detailed Functional Requirements</strong></a></font></td></tr><tr><td><blockquote>
+
+
+ <h3>Configurable Properties</h3>
+
+ <p>The implementation shall support the following properties
+ that can be configured with JavaBeans property setters:</p>
+ <ul>
+ <li>Configurable debugging detail level.</li>
+ <li>Configurable file pathname (absolute or relative to
+ <code>$CATALINA_BASE</code> of the XML file containing our
+ defined users. [<code>conf/tomcat-users.xml</code>].</li>
+ </ul>
+
+ <h3>Lifecycle Functionality</h3>
+
+ <p>The following processing must be performed when the <code>start()</code>
+ method is called:</p>
+ <ul>
+ <li>Open and parse the specified XML file.</li>
+ <li>Create an in-memory database representation of the XML file
+ contents.</li>
+ <li><strong>NOTE</strong> - There is no requirement to recognize
+ subsequent changes to the contents of the XML file.</li>
+ </ul>
+
+ <p>The following processing must be performed when the <code>stop()</code>
+ method is called:</p>
+ <ul>
+ <li>Release object references to the in-memory database representation.</li>
+ </ul>
+
+
+ <h3>Method authenticate() Functionality</h3>
+
+ <p>When <code>authenticate()</code> is called, the following processing
+ is required:</p>
+ <ul>
+ <li>Select the one and only "user" instance from the in-memory database,
+ based on matching the specified username. If there is no such
+ instance, return <code>null</code>.</li>
+ <li>Authenticate the user by comparing the (possibly encrypted) password
+ value that was received against the password presented by the user.
+ If there is no match, return <code>null</code>.</li>
+ <li>Construct a new instance of class
+ <code>org.apache.catalina.realm.GenericPrincipal</code> (if not
+ already using this as the internal database representation) that
+ contains the authenticated username and a <code>List</code> of the
+ security roles associated with this user.</li>
+ <li>Return the newly constructed <code>GenericPrincipal</code>.</li>
+ </ul>
+
+
+ <h3>Method hasRole() Functionality</h3>
+
+ <p>When <code>hasRole()</code> is called, the following processing
+ is required:</p>
+ <ul>
+ <li>The <code>principal</code> that is passed as an argument SHOULD
+ be one that we returned (instanceof class
+ <code>org.apache.catalina.realm.GenericPrincipal</code>, with a
+ <code>realm</code> property that is equal to our instance.</li>
+ <li>If the passed <code>principal</code> meets these criteria, check
+ the specified role against the list returned by
+ <code>getRoles()</code>, and return <code>true</code> if the
+ specified role is included; otherwise, return <code>false</code>.</li>
+ <li>If the passed <code>principal</code> does not meet these criteria,
+ return <code>false</code>.</li>
+ </ul>
+
+ </blockquote></td></tr></table>
+
+</blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Testable Assertions"><!--()--></a><a name="Testable_Assertions"><strong>Testable Assertions</strong></a></font></td></tr><tr><td><blockquote>
+
+ <p>In addition the the assertions implied by the functionality requirements
+ listed above, the following additional assertions shall be tested to
+ validate the behavior of <code>MemoryRealm</code>:</p>
+ <ul>
+ </ul>
+
+</blockquote></td></tr></table></td></tr><!--FOOTER SEPARATOR--><tr><td colspan="2"><hr noshade="noshade" size="1"></td></tr><!--PAGE FOOTER--><tr><td colspan="2"><div align="center"><font color="#525D76" size="-1"><em>
+ Copyright © 1999-2014, Apache Software Foundation
+ </em></font></div></td></tr></table></body></html>
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