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| 4 | </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="
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| 5 | Catalina Functional Specifications
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| Hongqing Liu | 7189829 | 2014-10-15 13:31:32 +0800 | [diff] [blame^] | 6 | " border="0"></a></td><td><h1><font face="arial,helvetica,sanserif">Apache Tomcat 6.0</font></h1><font face="arial,helvetica,sanserif">Version 6.0.41, May 19 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>
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| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 7 | <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>
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| 8 | </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>
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| 9 |
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| 10 |
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| 11 | <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>
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| 12 |
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| 13 | <p>The purpose of the <strong>JNDIRealm</strong> implementation is to
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| 14 | provide a mechanism by which Tomcat 6 can acquire information needed
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| 15 | to authenticate web application users, and define their security roles,
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| 16 | from a directory server or other service accessed via JNDI APIs. For
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| 17 | integration with Catalina, this class must implement the
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| 18 | <code>org.apache.catalina.Realm</code> interface.</p>
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| 19 |
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| 20 | <p>This specification reflects a combination of functionality that is
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| 21 | already present in the <code>org.apache.catalina.realm.JNDIRealm</code>
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| 22 | class, as well as requirements for enhancements that have been
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| 23 | discussed. Where appropriate, requirements statements are marked
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| 24 | <em>[Current]</em> and <em>[Requested]</em> to distinguish them.</p>
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| 25 |
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| 26 | <p>The current status of this functional specification is
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| 27 | <strong>PROPOSED</strong>. It has not yet been discussed and
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| 28 | agreed to on the TOMCAT-DEV mailing list.</p>
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| 29 |
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| 30 | <p>The code in the current version of <code>JNDIRealm</code>, and the
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| 31 | ideas expressed in this functional specification, are the results of
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| 32 | contributions from many individuals, including (alphabetically):</p>
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| 33 | <ul>
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| 34 | <li>Holman, John <j.g.holman@qmw.ac.uk></li>
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| 35 | <li>Lockhart, Ellen <elockhart@home.com></li>
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| 36 | <li>McClanahan, Craig <craigmcc@apache.org></li>
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| 37 | </ul>
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| 38 |
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| 39 | </blockquote></td></tr></table>
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| 40 |
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| 41 |
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| 42 | <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>
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| 43 |
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| 44 | <p>The implementation of this functionality depends on the following
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| 45 | external specifications:</p>
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| 46 | <ul>
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| 47 | <li><a href="http://java.sun.com/products/jndi/">Java Naming and
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| 48 | Directory Interface</a> (version 1.2.1 or later)</li>
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| 49 | </ul>
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| 50 |
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| 51 | </blockquote></td></tr></table>
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| 52 |
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| 53 |
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| 54 | <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>
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| 55 |
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| 56 | <p>The implementation of this functionality shall conform to the
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| 57 | following requirements:</p>
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| 58 | <ul>
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| 59 | <li>Be realized in one or more implementation classes.</li>
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| 60 | <li>Implement the <code>org.apache.catalina.Realm</code> interface.
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| 61 | [Current]</li>
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| 62 | <li>Implement the <code>org.apache.catalina.Lifecycle</code>
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| 63 | interface. [Current]</li>
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| 64 | <li>Subclass the <code>org.apache.catalina.realm.RealmBase</code>
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| 65 | base class.</li>
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| 66 | <li>Live in the <code>org.apache.catalina.realm</code> package.
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| 67 | [Current]</li>
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| 68 | <li>Support a configurable debugging detail level. [Current]</li>
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| 69 | <li>Log debugging and operational messages (suitably internationalized)
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| 70 | via the <code>getContainer().log()</code> method. [Current]</li>
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| 71 | </ul>
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| 72 |
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| 73 | </blockquote></td></tr></table>
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| 74 |
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| 75 |
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| 76 | </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>
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| 77 |
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| 78 |
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| 79 | <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>
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| 80 |
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| 81 | <p>The following environmental dependencies must be met in order for
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| 82 | JNDIRealm to operate correctly:</p>
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| 83 | <ul>
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| 84 | <li>The desire to utilize JNDIRealm must be registered in
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| 85 | <code>$CATALINA_BASE/conf/server.xml</code>, in a
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| 86 | <code><Realm></code> element that is nested inside a
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| 87 | corresponding <code><Engine></code>, <code><Host></code>,
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| 88 | or <code><Context></code> element.</li>
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| 89 | <li>If the <em>Administrator Login</em> operational mode is selected,
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| 90 | the configured administrator username and password must be configured
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| 91 | in the corresponding directory server.</li>
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| 92 | <li>If the <em>Username Login</em> operational mode is selected,
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| 93 | the corresponding directory server must be configured to accept
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| 94 | logins with the username and password that will be passed to
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| 95 | <code>JNDIRealm</code> by the appropriate <code>Authenticator</code>.
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| 96 | </li>
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| 97 | </ul>
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| 98 |
|
| 99 | </blockquote></td></tr></table>
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| 100 |
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| 101 |
|
| 102 | <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>
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| 103 |
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| 104 | <p>Correct operation of JNDIRealm depends on the following
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| 105 | specific features of the surrounding container:</p>
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| 106 | <ul>
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| 107 | <li>Interactions with <code>JNDIRealm</code> will be initiated by
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| 108 | the appropriate <code>Authenticator</code> implementation, based
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| 109 | on the login method that is selected.</li>
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| 110 | </ul>
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| 111 |
|
| 112 | </blockquote></td></tr></table>
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| 113 |
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| 114 |
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| 115 | </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>
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| 116 |
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| 117 |
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| 118 | <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>
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| 119 |
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| 120 | <p>The completed <code>JNDIRealm</code> must support two major operational
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| 121 | modes in order to support all of the required use cases. For the purposes
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| 122 | of this document, the modes are called <em>administrator login</em> and
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| 123 | <em>Username Login</em>. They are described further in the following
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| 124 | paragraphs.</p>
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| 125 |
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| 126 | <p>For <em>Administrator Login</em> mode, <code>JNDIRealm</code> will be
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| 127 | configured to establish one or more connections (using a connection pool)
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| 128 | to an appropriate directory server, using JNDI APIs, under a "system
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| 129 | administrator" username and password. This is similar to the approach
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| 130 | normally used to configure <code>JDBCRealm</code> to access authentication
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| 131 | and access control information in a database. It is assumed that the
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| 132 | system administrator username and password that are configured provide
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| 133 | sufficient privileges within the directory server to read (but not modify)
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| 134 | the username, password, and assigned roles for each valid user of the
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| 135 | web application associated with this <code>Realm</code>. The password
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| 136 | can be stored in cleartext, or in one of the digested modes supported by
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| 137 | the <code>org.apache.catalina.realm.RealmBase</code> base class.</p>
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| 138 |
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| 139 | <p>For <em>Username Login</em> mode, <code>JNDIRealm</code> does not
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| 140 | normally remain connected to the directory server. Instead, whenever a
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| 141 | user is to be authenticated, a connection to the directory server
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| 142 | (using the username and password received from the authenticator) is
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| 143 | attempted. If this connection is successful, the user is assumed to be
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| 144 | successfully authenticated. This connection is then utilized to read
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| 145 | the corresponding security roles associated with this user, and the
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| 146 | connection is then broken.</p>
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| 147 |
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| 148 | <p><strong>NOTE</strong> - <em>Username Login</em> mode cannot be used
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| 149 | if you have selected login method <code>DIGEST</code> in your web
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| 150 | application deployment descriptor (<code>web.xml</code>) file. This
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| 151 | restriction exists because the cleartext password is never available
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| 152 | to the container, so it is not possible to bind to the directory server
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| 153 | using the user's username and password.</p>
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| 154 |
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| 155 | <p>Because these operational modes work so differently, the functionality
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| 156 | for each mode will be described separately. Whether or not both modes
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| 157 | are actually supported by a single class (versus a class per mode) is
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| 158 | an implementation detail left to the designer.</p>
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| 159 |
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| 160 | <p><strong>NOTE</strong> - The current implementation only implements
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| 161 | part of the <em>Administrator Lookup</em> mode requirements. It does
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| 162 | not support the <em>Username Lookup</em> mode at all, at this point.</p>
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| 163 |
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| 164 | </blockquote></td></tr></table>
|
| 165 |
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| 166 |
|
| 167 | <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>
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| 168 |
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| 169 |
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| 170 | <h3>Configurable Properties</h3>
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| 171 |
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| 172 | <p>The implementation shall support the following properties
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| 173 | that can be configured with JavaBeans property setters:</p>
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| 174 | <ul>
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| 175 | <li><code>connectionURL</code> - URL of the directory server we will
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| 176 | be contacting.</li>
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| 177 | <li><code>contextFactory</code> - Fully qualified class name of the JNDI
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| 178 | context factory used to retrieve our InitialContext.
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| 179 | [com.sun.jndi.ldap.LdapCtxFactory]</li>
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| 180 | <li>Additional configuration properties required to establish the
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| 181 | appropriate connection. [Requested]</li>
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| 182 | <li>Connection pool configuration properties. [Requested]</li>
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| 183 | <li>Configuration properties defining how a particular user is
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| 184 | authenticated. The following capabilities should be supported:
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| 185 | <ul>
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| 186 | <li>Substitute the specified username into a string. [Requested]</li>
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| 187 | <li>Retrieve the distinguished name (DN) of an authorized user via an
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| 188 | LDAP search string with a replacement placeholder for the
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| 189 | username, and comparison of the password to a configurable
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| 190 | attribute retrieved from the search result. [Current]</li>
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| 191 | </ul></li>
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| 192 | <li>Configuration properties defining how the roles associated with a
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| 193 | particular authenticated user can be retrieved. The following
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| 194 | approaches should be supported:
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| 195 | <ul>
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| 196 | <li>Retrieve a specified attribute (possibly multi-valued)
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| 197 | from an LDAP search expression,
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| 198 | with a replacement placeholder for the DN of the user.
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| 199 | [Current]</li>
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| 200 | <li>Retrieve a set of role names that are defined implicitly (by
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| 201 | selecting principals that match a search pattern) rather than
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| 202 | explicitly (by finding a particular attribute value).
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| 203 | [Requested]</li>
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| 204 | </ul></li>
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| 205 | </ul>
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| 206 |
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| 207 | <h3>Lifecycle Functionality</h3>
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| 208 |
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| 209 | <p>The following processing must be performed when the <code>start()</code>
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| 210 | method is called:</p>
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| 211 | <ul>
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| 212 | <li>Establish a connection to the configured directory server, using the
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| 213 | configured system administrator username and password. [Current]</li>
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| 214 | <li>Configure and establish a connection pool of connections to the
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| 215 | directory server. [Requested]</li>
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| 216 | </ul>
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| 217 |
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| 218 | <p>The following processing must be performed when the <code>stop()</code>
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| 219 | method is called:</p>
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| 220 | <ul>
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| 221 | <li>Close any opened connections to the directory server.</li>
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| 222 | </ul>
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| 223 |
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| 224 |
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| 225 | <h3>Method authenticate() Functionality</h3>
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| 226 |
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| 227 | <p>When <code>authenticate()</code> is called, the following processing
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| 228 | is required:</p>
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| 229 | <ul>
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| 230 | <li>Acquire the one and only connection [Current] or acquire a connection
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| 231 | from the connection pool [Requested].</li>
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| 232 | <li>Authenticate the user by retrieving the user's Distinguished Name,
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| 233 | based on the specified username and password.</li>
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| 234 | <li>If the user was not authenticated, release the allocated connection
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| 235 | and return <code>null</code>.</li>
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| 236 | <li>Acquire a <code>List</code> of the security roles assigned to the
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| 237 | authenticated user.</li>
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| 238 | <li>Construct a new instance of class
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| 239 | <code>org.apache.catalina.realm.GenericPrincipal</code>, passing as
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| 240 | constructor arguments: this realm instance, the authenticated
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| 241 | username, and a <code>List</code> of the security roles associated
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| 242 | with this user.</li>
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| 243 | <li><strong>WARNING</strong> - Do not attempt to cache and reuse previous
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| 244 | <code>GenericPrincipal</code> objects for a particular user, because
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| 245 | the information in the directory server might have changed since the
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| 246 | last time this user was authenticated.</li>
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| 247 | <li>Return the newly constructed <code>GenericPrincipal</code>.</li>
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| 248 | </ul>
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| 249 |
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| 250 |
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| 251 | <h3>Method hasRole() Functionality</h3>
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| 252 |
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| 253 | <p>When <code>hasRole()</code> is called, the following processing
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| 254 | is required:</p>
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| 255 | <ul>
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| 256 | <li>The <code>principal</code> that is passed as an argument SHOULD
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| 257 | be one that we returned (instanceof class
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| 258 | <code>org.apache.catalina.realm.GenericPrincipal</code>, with a
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| 259 | <code>realm</code> property that is equal to our instance.</li>
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| 260 | <li>If the passed <code>principal</code> meets these criteria, check
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| 261 | the specified role against the list returned by
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| 262 | <code>getRoles()</code>, and return <code>true</code> if the
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| 263 | specified role is included; otherwise, return <code>false</code>.</li>
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| 264 | <li>If the passed <code>principal</code> does not meet these criteria,
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| 265 | return <code>false</code>.</li>
|
| 266 | </ul>
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| 267 |
|
| 268 | </blockquote></td></tr></table>
|
| 269 |
|
| 270 |
|
| 271 | <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>
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| 272 |
|
| 273 | <h3>Configurable Properties</h3>
|
| 274 |
|
| 275 | <p>The implementation shall support the following properties
|
| 276 | that can be configured with JavaBeans property setters:</p>
|
| 277 | <ul>
|
| 278 | <li><code>connectionURL</code> - URL of the directory server we will
|
| 279 | be contacting.</li>
|
| 280 | <li><code>contextFactory</code> - Fully qualified class name of the JNDI
|
| 281 | context factory used to retrieve our InitialContext.
|
| 282 | [com.sun.jndi.ldap.LdapCtxFactory]</li>
|
| 283 | <li>Additional configuration properties required to establish the
|
| 284 | appropriate connection. [Requested]</li>
|
| 285 | <li>Connection pool configuration properties. [Requested]</li>
|
| 286 | <li>Configuration properties defining if and how a user might be looked
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| 287 | up before binding to the directory server. The following approaches
|
| 288 | should be supported:
|
| 289 | <ul>
|
| 290 | <li>No previous lookup is required - username specified by the user
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| 291 | is the same as that used to authenticate to the directory
|
| 292 | server.</li>
|
| 293 | <li>Substitute the specified username into a string.</li>
|
| 294 | <li>Search the directory server based on configured criteria to
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| 295 | retrieve the distinguished name of the user, then attempt to
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| 296 | bind with that distinguished name.</li>
|
| 297 | </ul></li>
|
| 298 | <li>Configuration properties defining how the roles associated with a
|
| 299 | particular authenticated user can be retrieved. The following
|
| 300 | approaches should be supported:
|
| 301 | <ul>
|
| 302 | <li>Retrieve a specified attribute (possibly multi-valued)
|
| 303 | from an LDAP search expression,
|
| 304 | with a replacement placeholder for the DN of the user.
|
| 305 | [Current]</li>
|
| 306 | </ul></li>
|
| 307 | </ul>
|
| 308 |
|
| 309 | <h3>Lifecycle Functionality</h3>
|
| 310 |
|
| 311 | <p>The following processing must be performed when the <code>start()</code>
|
| 312 | method is called:</p>
|
| 313 | <ul>
|
| 314 | <li>None required.</li>
|
| 315 | </ul>
|
| 316 |
|
| 317 | <p>The following processing must be performed when the <code>stop()</code>
|
| 318 | method is called:</p>
|
| 319 | <ul>
|
| 320 | <li>None required.</li>
|
| 321 | </ul>
|
| 322 |
|
| 323 |
|
| 324 | <h3>Method authenticate() Functionality</h3>
|
| 325 |
|
| 326 | <p>When <code>authenticate()</code> is called, the following processing
|
| 327 | is required:</p>
|
| 328 | <ul>
|
| 329 | <li>Attempt to bind to the directory server, using the username and
|
| 330 | password provided by the user.</li>
|
| 331 | <li>If the user was not authenticated, release the allocated connection
|
| 332 | and return <code>null</code>.</li>
|
| 333 | <li>Acquire a <code>List</code> of the security roles assigned to the
|
| 334 | authenticated user.</li>
|
| 335 | <li>Construct a new instance of class
|
| 336 | <code>org.apache.catalina.realm.GenericPrincipal</code>, passing as
|
| 337 | constructor arguments: this realm instance, the authenticated
|
| 338 | username, and a <code>List</code> of the security roles associated
|
| 339 | with this user.</li>
|
| 340 | <li><strong>WARNING</strong> - Do not attempt to cache and reuse previous
|
| 341 | <code>GenericPrincipal</code> objects for a particular user, because
|
| 342 | the information in the directory server might have changed since the
|
| 343 | last time this user was authenticated.</li>
|
| 344 | <li>Return the newly constructed <code>GenericPrincipal</code>.</li>
|
| 345 | </ul>
|
| 346 |
|
| 347 |
|
| 348 | <h3>Method hasRole() Functionality</h3>
|
| 349 |
|
| 350 | <p>When <code>hasRole()</code> is called, the following processing
|
| 351 | is required:</p>
|
| 352 | <ul>
|
| 353 | <li>The <code>principal</code> that is passed as an argument SHOULD
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| 354 | be one that we returned (instanceof class
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| 355 | <code>org.apache.catalina.realm.GenericPrincipal</code>, with a
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| 356 | <code>realm</code> property that is equal to our instance.</li>
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| 357 | <li>If the passed <code>principal</code> meets these criteria, check
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| 358 | the specified role against the list returned by
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| 359 | <code>getRoles()</code>, and return <code>true</code> if the
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| 360 | specified role is included; otherwise, return <code>false</code>.</li>
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| 361 | <li>If the passed <code>principal</code> does not meet these criteria,
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| 362 | return <code>false</code>.</li>
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| 363 | </ul>
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| 364 |
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| 365 | </blockquote></td></tr></table>
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| 366 |
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| 367 | </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>
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| 368 |
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| 369 | <p>In addition the the assertions implied by the functionality requirements
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| 370 | listed above, the following additional assertions shall be tested to
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| 371 | validate the behavior of <code>JNDIRealm</code>:</p>
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| 372 | <ul>
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| 373 | </ul>
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| 374 |
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| 375 | </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>
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| 376 | Copyright © 1999-2014, Apache Software Foundation
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| 377 | </em></font></div></td></tr></table></body></html> |