org.apache.catalina.realm

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Java Source Code / Java Documentation » Sevlet Container » apache tomcat 6.0.14 » org.apache.catalina.realm 
org.apache.catalina.realm

This package contains Realm implementations for the various supported realm technologies for authenticating users and identifying their associated roles. The Realm that is associated with a web application's Context (or a hierarchically superior Container) is used to resolve authentication and role presence questions when a web application uses container managed security as described in the Servlet API Specification, version 2.2.

The implementations share a common base class that supports basic functionality for all of the standard Realm implementations, and can be configured by setting the following properties (default values are in square brackets):

  • debug - Debugging detail level for this component. [0]

The standard Realm implementations that are currently available include the following (with additional configuration properties as specified):

  • JDBCRealm - Implementation of Realm that operates from data stored in a relational database that is accessed via a JDBC driver. The name of the driver, database connection information, and the names of the relevant tables and columns are configured with the following additional properties:
    • connectionURL - The URL to use when connecting to this database. [REQUIRED - NO DEFAULT]
    • driverName - Fully qualified Java class name of the JDBC driver to be used. [REQUIRED - NO DEFAULT]
    • roleNameCol - Name of the database column that contains role names. [REQUIRED - NO DEFAULT]
    • userCredCol - Name of the database column that contains the user's credentials (i.e. password) in cleartext. [REQUIRED - NO DEFAULT]
    • userNameCol - Name of the database column that contains the user's logon username. [REQUIRED - NO DEFAULT]
    • userRoleTable - Name of the database table containing user role information. This table must include the columns specified by the userNameCol and roleNameCol properties. [REQUIRED - NO DEFAULT]
    • userTable - Name of the database table containing user information. This table must include the columns specified by the userNameCol and userCredCol properties. [REQUIRED - NO DEFAULT]
  • MemoryRealm - Implementation of Realm that uses the contents of a simple XML file (conf/tomcat-users.xml) as the list of valid users and their roles. This implementation is primarily to demonstrate that the authentication technology functions correctly, and is not anticipated as adequate for general purpose use. This component supports the following additional properties:
    • pathname - Pathname of the XML file containing our user and role information. If a relative pathname is specified, it is resolved against the pathname specified by the "catalina.home" system property. [conf/tomcat-users.xml]
Java Source File NameTypeComment
Constants.javaClass Manifest constants for this Java package.
author:
   Craig R.
DataSourceRealm.javaClass Implmentation of Realm that works with any JDBC JNDI DataSource. See the JDBCRealm.howto for more details on how to set up the database and for configuration options.
author:
   Glenn L.
GenericPrincipal.javaClass Generic implementation of java.security.Principal that is available for use by Realm implementations.
author:
   Craig R.
JAASCallbackHandler.javaClass

Implementation of the JAAS CallbackHandler interface, used to negotiate delivery of the username and credentials that were specified to our constructor.

JAASMemoryLoginModule.javaClass

Implementation of the JAAS LoginModule interface, primarily for use in testing JAASRealm.

JAASRealm.javaClass

Implmentation of Realm that authenticates users via the Java Authentication and Authorization Service (JAAS).

JDBCRealm.javaClass Implmentation of Realm that works with any JDBC supported database. See the JDBCRealm.howto for more details on how to set up the database and for configuration options.

TODO - Support connection pooling (including message format objects) so that authenticate(), getPassword() and authenticate() do not have to be synchronized and would fix the ugly connection logic.

JNDIRealm.javaClass

Implementation of Realm that works with a directory server accessed via the Java Naming and Directory Interface (JNDI) APIs. The following constraints are imposed on the data structure in the underlying directory server:

  • Each user that can be authenticated is represented by an individual element in the top level DirContext that is accessed via the connectionURL property.
  • If a socket connection can not be made to the connectURL an attempt will be made to use the alternateURL if it exists.
  • Each user element has a distinguished name that can be formed by substituting the presented username into a pattern configured by the userPattern property.
  • Alternatively, if the userPattern property is not specified, a unique element can be located by searching the directory context.
MemoryRealm.javaClass Simple implementation of Realm that reads an XML file to configure the valid users, passwords, and roles.
MemoryRuleSet.javaClass

RuleSet for recognizing the users defined in the XML file processed by MemoryRealm.


author:
   Craig R.
RealmBase.javaClass Simple implementation of Realm that reads an XML file to configure the valid users, passwords, and roles.
UserDatabaseRealm.javaClass

Implementation of org.apache.catalina.Realm that is based on an implementation of UserDatabase made available through the global JNDI resources configured for this instance of Catalina.

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