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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) - JNDIRealm</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>JNDIRealm</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="#Operational_Modes">Operational Modes</a></li><li><a href="#Administrator_Login_Mode_Functionality">Administrator Login Mode Functionality</a></li><li><a href="#Username_Login_Mode_Functionality">Username Login Mode Functionality</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>JNDIRealm</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 directory server or other service accessed via JNDI APIs. For
+ integration with Catalina, this class must implement the
+ <code>org.apache.catalina.Realm</code> interface.</p>
+
+ <p>This specification reflects a combination of functionality that is
+ already present in the <code>org.apache.catalina.realm.JNDIRealm</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>
+
+ <p>The code in the current version of <code>JNDIRealm</code>, and the
+ ideas expressed in this functional specification, are the results of
+ contributions from many individuals, including (alphabetically):</p>
+ <ul>
+ <li>Holman, John <j.g.holman@qmw.ac.uk></li>
+ <li>Lockhart, Ellen <elockhart@home.com></li>
+ <li>McClanahan, Craig <craigmcc@apache.org></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="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><a href="http://java.sun.com/products/jndi/">Java Naming and
+ Directory Interface</a> (version 1.2.1 or later)</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
+ JNDIRealm to operate correctly:</p>
+ <ul>
+ <li>The desire to utilize JNDIRealm 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.</li>
+ <li>If the <em>Administrator Login</em> operational mode is selected,
+ the configured administrator username and password must be configured
+ in the corresponding directory server.</li>
+ <li>If the <em>Username Login</em> operational mode is selected,
+ the corresponding directory server must be configured to accept
+ logins with the username and password that will be passed to
+ <code>JNDIRealm</code> by the appropriate <code>Authenticator</code>.
+ </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 JNDIRealm depends on the following
+ specific features of the surrounding container:</p>
+ <ul>
+ <li>Interactions with <code>JNDIRealm</code> will be initiated by
+ the appropriate <code>Authenticator</code> implementation, based
+ on the login method that is selected.</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="Operational Modes"><!--()--></a><a name="Operational_Modes"><strong>Operational Modes</strong></a></font></td></tr><tr><td><blockquote>
+
+ <p>The completed <code>JNDIRealm</code> must support two major operational
+ modes in order to support all of the required use cases. For the purposes
+ of this document, the modes are called <em>administrator login</em> and
+ <em>Username Login</em>. They are described further in the following
+ paragraphs.</p>
+
+ <p>For <em>Administrator Login</em> mode, <code>JNDIRealm</code> will be
+ configured to establish one or more connections (using a connection pool)
+ to an appropriate directory server, using JNDI APIs, under a "system
+ administrator" username and password. This is similar to the approach
+ normally used to configure <code>JDBCRealm</code> to access authentication
+ and access control information in a database. It is assumed that the
+ system administrator username and password that are configured provide
+ sufficient privileges within the directory server to read (but not modify)
+ the username, password, and assigned roles for each valid user of the
+ web application associated with this <code>Realm</code>. The password
+ can be stored in cleartext, or in one of the digested modes supported by
+ the <code>org.apache.catalina.realm.RealmBase</code> base class.</p>
+
+ <p>For <em>Username Login</em> mode, <code>JNDIRealm</code> does not
+ normally remain connected to the directory server. Instead, whenever a
+ user is to be authenticated, a connection to the directory server
+ (using the username and password received from the authenticator) is
+ attempted. If this connection is successful, the user is assumed to be
+ successfully authenticated. This connection is then utilized to read
+ the corresponding security roles associated with this user, and the
+ connection is then broken.</p>
+
+ <p><strong>NOTE</strong> - <em>Username Login</em> mode cannot be used
+ if you have selected login method <code>DIGEST</code> in your web
+ application deployment descriptor (<code>web.xml</code>) file. This
+ restriction exists because the cleartext password is never available
+ to the container, so it is not possible to bind to the directory server
+ using the user's username and password.</p>
+
+ <p>Because these operational modes work so differently, the functionality
+ for each mode will be described separately. Whether or not both modes
+ are actually supported by a single class (versus a class per mode) is
+ an implementation detail left to the designer.</p>
+
+ <p><strong>NOTE</strong> - The current implementation only implements
+ part of the <em>Administrator Lookup</em> mode requirements. It does
+ not support the <em>Username Lookup</em> mode at all, at this point.</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="Administrator Login Mode Functionality"><!--()--></a><a name="Administrator_Login_Mode_Functionality"><strong>Administrator Login Mode Functionality</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><code>connectionURL</code> - URL of the directory server we will
+ be contacting.</li>
+ <li><code>contextFactory</code> - Fully qualified class name of the JNDI
+ context factory used to retrieve our InitialContext.
+ [com.sun.jndi.ldap.LdapCtxFactory]</li>
+ <li>Additional configuration properties required to establish the
+ appropriate connection. [Requested]</li>
+ <li>Connection pool configuration properties. [Requested]</li>
+ <li>Configuration properties defining how a particular user is
+ authenticated. The following capabilities should be supported:
+ <ul>
+ <li>Substitute the specified username into a string. [Requested]</li>
+ <li>Retrieve the distinguished name (DN) of an authorized user via an
+ LDAP search string with a replacement placeholder for the
+ username, and comparison of the password to a configurable
+ attribute retrieved from the search result. [Current]</li>
+ </ul></li>
+ <li>Configuration properties defining how the roles associated with a
+ particular authenticated user can be retrieved. The following
+ approaches should be supported:
+ <ul>
+ <li>Retrieve a specified attribute (possibly multi-valued)
+ from an LDAP search expression,
+ with a replacement placeholder for the DN of the user.
+ [Current]</li>
+ <li>Retrieve a set of role names that are defined implicitly (by
+ selecting principals that match a search pattern) rather than
+ explicitly (by finding a particular attribute value).
+ [Requested]</li>
+ </ul></li>
+ </ul>
+
+ <h3>Lifecycle Functionality</h3>
+
+ <p>The following processing must be performed when the <code>start()</code>
+ method is called:</p>
+ <ul>
+ <li>Establish a connection to the configured directory server, using the
+ configured system administrator username and password. [Current]</li>
+ <li>Configure and establish a connection pool of connections to the
+ directory server. [Requested]</li>
+ </ul>
+
+ <p>The following processing must be performed when the <code>stop()</code>
+ method is called:</p>
+ <ul>
+ <li>Close any opened connections to the directory server.</li>
+ </ul>
+
+
+ <h3>Method authenticate() Functionality</h3>
+
+ <p>When <code>authenticate()</code> is called, the following processing
+ is required:</p>
+ <ul>
+ <li>Acquire the one and only connection [Current] or acquire a connection
+ from the connection pool [Requested].</li>
+ <li>Authenticate the user by retrieving the user's Distinguished Name,
+ based on the specified username and password.</li>
+ <li>If the user was not authenticated, release the allocated connection
+ and return <code>null</code>.</li>
+ <li>Acquire a <code>List</code> of the security roles assigned to the
+ authenticated user.</li>
+ <li>Construct a new instance of class
+ <code>org.apache.catalina.realm.GenericPrincipal</code>, passing as
+ constructor arguments: this realm instance, the authenticated
+ username, and a <code>List</code> of the security roles associated
+ with this user.</li>
+ <li><strong>WARNING</strong> - Do not attempt to cache and reuse previous
+ <code>GenericPrincipal</code> objects for a particular user, because
+ the information in the directory server might have changed since the
+ last time this user was authenticated.</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>
+
+
+ <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Username Login Mode Functionality"><!--()--></a><a name="Username_Login_Mode_Functionality"><strong>Username Login Mode Functionality</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><code>connectionURL</code> - URL of the directory server we will
+ be contacting.</li>
+ <li><code>contextFactory</code> - Fully qualified class name of the JNDI
+ context factory used to retrieve our InitialContext.
+ [com.sun.jndi.ldap.LdapCtxFactory]</li>
+ <li>Additional configuration properties required to establish the
+ appropriate connection. [Requested]</li>
+ <li>Connection pool configuration properties. [Requested]</li>
+ <li>Configuration properties defining if and how a user might be looked
+ up before binding to the directory server. The following approaches
+ should be supported:
+ <ul>
+ <li>No previous lookup is required - username specified by the user
+ is the same as that used to authenticate to the directory
+ server.</li>
+ <li>Substitute the specified username into a string.</li>
+ <li>Search the directory server based on configured criteria to
+ retrieve the distinguished name of the user, then attempt to
+ bind with that distinguished name.</li>
+ </ul></li>
+ <li>Configuration properties defining how the roles associated with a
+ particular authenticated user can be retrieved. The following
+ approaches should be supported:
+ <ul>
+ <li>Retrieve a specified attribute (possibly multi-valued)
+ from an LDAP search expression,
+ with a replacement placeholder for the DN of the user.
+ [Current]</li>
+ </ul></li>
+ </ul>
+
+ <h3>Lifecycle Functionality</h3>
+
+ <p>The following processing must be performed when the <code>start()</code>
+ method is called:</p>
+ <ul>
+ <li>None required.</li>
+ </ul>
+
+ <p>The following processing must be performed when the <code>stop()</code>
+ method is called:</p>
+ <ul>
+ <li>None required.</li>
+ </ul>
+
+
+ <h3>Method authenticate() Functionality</h3>
+
+ <p>When <code>authenticate()</code> is called, the following processing
+ is required:</p>
+ <ul>
+ <li>Attempt to bind to the directory server, using the username and
+ password provided by the user.</li>
+ <li>If the user was not authenticated, release the allocated connection
+ and return <code>null</code>.</li>
+ <li>Acquire a <code>List</code> of the security roles assigned to the
+ authenticated user.</li>
+ <li>Construct a new instance of class
+ <code>org.apache.catalina.realm.GenericPrincipal</code>, passing as
+ constructor arguments: this realm instance, the authenticated
+ username, and a <code>List</code> of the security roles associated
+ with this user.</li>
+ <li><strong>WARNING</strong> - Do not attempt to cache and reuse previous
+ <code>GenericPrincipal</code> objects for a particular user, because
+ the information in the directory server might have changed since the
+ last time this user was authenticated.</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>JNDIRealm</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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