JAASRealm (Apache Tomcat 7.0.67 API Documentation)

java.lang.Object
- org.apache.catalina.util.LifecycleBase
- - org.apache.catalina.util.LifecycleMBeanBase
  - - org.apache.catalina.realm.RealmBase
    - - org.apache.catalina.realm.JAASRealm

All Implemented Interfaces:

javax.management.MBeanRegistration, Lifecycle, Realm
```
public class JAASRealm
extends RealmBase
```
Implementation of Realm that authenticates users via the Java Authentication and Authorization Service (JAAS). JAAS support requires either JDK 1.4 (which includes it as part of the standard platform) or JDK 1.3 (with the plug-in jaas.jar file).

The value configured for the appName property is passed to the javax.security.auth.login.LoginContext constructor, to specify the application name used to select the set of relevant LoginModules required.

The JAAS Specification describes the result of a successful login as a javax.security.auth.Subject instance, which can contain zero or more java.security.Principal objects in the return value of the Subject.getPrincipals() method. However, it provides no guidance on how to distinguish Principals that describe the individual user (and are thus appropriate to return as the value of request.getUserPrincipal() in a web application) from the Principal(s) that describe the authorized roles for this user. To maintain as much independence as possible from the underlying LoginMethod implementation executed by JAAS, the following policy is implemented by this Realm:
- The JAAS LoginModule is assumed to return a Subject with at least one Principal instance representing the user himself or herself, and zero or more separate Principals representing the security roles authorized for this user.
- On the Principal representing the user, the Principal name is an appropriate value to return via the Servlet API method HttpServletRequest.getRemoteUser().
- On the Principals representing the security roles, the name is the name of the authorized security role.
- This Realm will be configured with two lists of fully qualified Java class names of classes that implement java.security.Principal - one that identifies class(es) representing a user, and one that identifies class(es) representing a security role.
- As this Realm iterates over the Principals returned by Subject.getPrincipals(), it will identify the first Principal that matches the "user classes" list as the Principal for this user.
- As this Realm iterates over the Principals returned by Subject.getPrincipals(), it will accumulate the set of all Principals matching the "role classes" list as identifying the security roles for this user.
- It is a configuration error for the JAAS login method to return a validated Subject without a Principal that matches the "user classes" list.
- By default, the enclosing Container's name serves as the application name used to obtain the JAAS LoginContext ("Catalina" in a default installation). Tomcat must be able to find an application with this name in the JAAS configuration file. Here is a hypothetical JAAS configuration file entry for a database-oriented login module that uses a Tomcat-managed JNDI database resource:
```
Catalina {
org.foobar.auth.DatabaseLoginModule REQUIRED
    JNDI_RESOURCE=jdbc/AuthDB
  USER_TABLE=users
  USER_ID_COLUMN=id
  USER_NAME_COLUMN=name
  USER_CREDENTIAL_COLUMN=password
  ROLE_TABLE=roles
  ROLE_NAME_COLUMN=name
  PRINCIPAL_FACTORY=org.foobar.auth.impl.SimplePrincipalFactory;
};
```
- To set the JAAS configuration file location, set the CATALINA_OPTS environment variable similar to the following:
  CATALINA_OPTS="-Djava.security.auth.login.config=$CATALINA_HOME/conf/jaas.config"
- As part of the login process, JAASRealm registers its own CallbackHandler, called (unsurprisingly) JAASCallbackHandler. This handler supplies the HTTP requests's username and credentials to the user-supplied LoginModule
- As with other Realm implementations, digested passwords are supported if the <Realm> element in server.xml contains a digest attribute; JAASCallbackHandler will digest the password prior to passing it back to the LoginModule
Author:

Craig R. McClanahan, Yoav Shapira

Nested Class Summary
- Nested classes/interfaces inherited from class org.apache.catalina.realm.RealmBase
  RealmBase.AllRolesMode

Field Summary

Fields
Modifier and Type	Field and Description
`protected java.lang.String`	`appName` The application name passed to the JAAS `LoginContext`, which uses it to select the set of relevant `LoginModule`s.
`protected java.lang.String`	`configFile` Path to find a JAAS configuration file, if not set global JVM JAAS configuration will be used.
`protected static java.lang.String`	`info` Descriptive information about this `Realm` implementation.
`protected javax.security.auth.login.Configuration`	`jaasConfiguration`
`protected boolean`	`jaasConfigurationLoaded`
`protected static java.lang.String`	`name` Descriptive information about this `Realm` implementation.
`protected java.util.List<java.lang.String>`	`roleClasses` The list of role class names, split out for easy processing.
`protected java.lang.String`	`roleClassNames` Comma-delimited list of `java.security.Principal` classes that represent security roles.
`protected boolean`	`useContextClassLoader` Whether to use context ClassLoader or default ClassLoader.
`protected java.util.List<java.lang.String>`	`userClasses` The set of user class names, split out for easy processing.
`protected java.lang.String`	`userClassNames` Comma-delimited list of `java.security.Principal` classes that represent individual users.

Fields inherited from class org.apache.catalina.realm.RealmBase
allRolesMode, container, containerLog, digest, digestEncoding, md, md5Encoder, md5Helper, realmPath, sm, stripRealmForGss, support, validate, x509UsernameRetriever, x509UsernameRetrieverClassName

Fields inherited from class org.apache.catalina.util.LifecycleMBeanBase
mserver

Fields inherited from interface org.apache.catalina.Lifecycle
AFTER_DESTROY_EVENT, AFTER_INIT_EVENT, AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_DESTROY_EVENT, BEFORE_INIT_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, CONFIGURE_START_EVENT, CONFIGURE_STOP_EVENT, PERIODIC_EVENT, START_EVENT, STOP_EVENT

Constructor Summary

Constructors
Constructor and Description

JAASRealm()

Constructors
Constructor and Description
`JAASRealm()`

Method Summary

Methods
Modifier and Type	Method and Description
`protected java.security.Principal`	`authenticate(java.lang.String username, javax.security.auth.callback.CallbackHandler callbackHandler)` Perform the actual JAAS authentication
`java.security.Principal`	`authenticate(java.lang.String username, java.lang.String credentials)` Return the `Principal` associated with the specified username and credentials, if there is one; otherwise return `null`.
`java.security.Principal`	`authenticate(java.lang.String username, java.lang.String clientDigest, java.lang.String nonce, java.lang.String nc, java.lang.String cnonce, java.lang.String qop, java.lang.String realmName, java.lang.String md5a2)` Return the `Principal` associated with the specified username and digest, if there is one; otherwise return `null`.
`protected java.security.Principal`	`createPrincipal(java.lang.String username, javax.security.auth.Subject subject, javax.security.auth.login.LoginContext loginContext)` Identify and return a `java.security.Principal` instance representing the authenticated user for the specified `Subject`.
`java.lang.String`	`getAppName()` getter for the `appName` member variable
`protected javax.security.auth.login.Configuration`	`getConfig()` Load custom JAAS Configuration
`java.lang.String`	`getConfigFile()` Getter for the `configfile` member variable.
`java.lang.String`	`getInfo()` Return descriptive information about this Realm implementation and the corresponding version number, in the format `<description>/<version>`.
`protected java.lang.String`	`getName()` Return a short name for this `Realm` implementation.
`protected java.lang.String`	`getPassword(java.lang.String username)` Return the password associated with the given principal's user name.
`protected java.security.Principal`	`getPrincipal(java.lang.String username)` Return the `Principal` associated with the given user name.
`java.lang.String`	`getRoleClassNames()`
`java.lang.String`	`getUserClassNames()`
`boolean`	`isUseContextClassLoader()` Returns whether to use the context or default ClassLoader.
`protected java.lang.String`	`makeLegalForJAAS(java.lang.String src)` Ensure the given name is legal for JAAS configuration.
`protected void`	`parseClassNames(java.lang.String classNamesString, java.util.List<java.lang.String> classNamesList)` Parses a comma-delimited list of class names, and store the class names in the provided List.
`void`	`setAppName(java.lang.String name)` setter for the `appName` member variable
`void`	`setConfigFile(java.lang.String configFile)` Setter for the `configfile` member variable.
`void`	`setContainer(Container container)` Set the Container with which this Realm has been associated.
`void`	`setRoleClassNames(java.lang.String roleClassNames)` Sets the list of comma-delimited classes that represent roles.
`void`	`setUseContextClassLoader(boolean useContext)` Sets whether to use the context or default ClassLoader.
`void`	`setUserClassNames(java.lang.String userClassNames)` Sets the list of comma-delimited classes that represent individual users.
`protected void`	`startInternal()` Prepare for the beginning of active use of the public methods of this component and implement the requirements of `LifecycleBase.startInternal()`.

Methods inherited from class org.apache.catalina.util.LifecycleMBeanBase
destroyInternal, getDomain, getObjectName, postDeregister, postRegister, preDeregister, preRegister, register, setDomain, unregister

Methods inherited from class org.apache.catalina.util.LifecycleBase
addLifecycleListener, destroy, findLifecycleListeners, fireLifecycleEvent, getState, getStateName, init, removeLifecycleListener, setState, setState, start, stop

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - appName
```
protected java.lang.String appName
```
    The application name passed to the JAAS LoginContext, which uses it to select the set of relevant LoginModules.
  - info
```
protected static final java.lang.String info
```
    Descriptive information about this Realm implementation.
    
    See Also:
    Constant Field Values
  - name
```
protected static final java.lang.String name
```
    Descriptive information about this Realm implementation.
    
    See Also:
    Constant Field Values
  - roleClasses
```
protected java.util.List<java.lang.String> roleClasses
```
    The list of role class names, split out for easy processing.
  - userClasses
```
protected java.util.List<java.lang.String> userClasses
```
    The set of user class names, split out for easy processing.
  - useContextClassLoader
```
protected boolean useContextClassLoader
```
    Whether to use context ClassLoader or default ClassLoader. True means use context ClassLoader, and True is the default value.
  - configFile
```
protected java.lang.String configFile
```
    Path to find a JAAS configuration file, if not set global JVM JAAS configuration will be used.
  - jaasConfiguration
```
protected javax.security.auth.login.Configuration jaasConfiguration
```
  - jaasConfigurationLoaded
```
protected volatile boolean jaasConfigurationLoaded
```
  - roleClassNames
```
protected java.lang.String roleClassNames
```
    Comma-delimited list of java.security.Principal classes that represent security roles.
  - userClassNames
```
protected java.lang.String userClassNames
```
    Comma-delimited list of java.security.Principal classes that represent individual users.
- Constructor Detail
  - JAASRealm
```
public JAASRealm()
```
- Method Detail
  - getConfigFile
```
public java.lang.String getConfigFile()
```
    Getter for the configfile member variable.
  - setConfigFile
```
public void setConfigFile(java.lang.String configFile)
```
    Setter for the configfile member variable.
  - setAppName
```
public void setAppName(java.lang.String name)
```
    setter for the appName member variable
  - getAppName
```
public java.lang.String getAppName()
```
    getter for the appName member variable
  - setUseContextClassLoader
```
public void setUseContextClassLoader(boolean useContext)
```
    Sets whether to use the context or default ClassLoader. True means use context ClassLoader.
    
    Parameters:
    useContext - True means use context ClassLoader
  - isUseContextClassLoader
```
public boolean isUseContextClassLoader()
```
    Returns whether to use the context or default ClassLoader. True means to use the context ClassLoader.
    
    Returns:
    The value of useContextClassLoader
  - setContainer
```
public void setContainer(Container container)
```
    Description copied from class: RealmBase
    
    Set the Container with which this Realm has been associated.
    
    Specified by:
    
    setContainer in interface Realm
    
    Overrides:
    
    setContainer in class RealmBase
    
    Parameters:
    container - The associated Container
  - getRoleClassNames
```
public java.lang.String getRoleClassNames()
```
  - setRoleClassNames
```
public void setRoleClassNames(java.lang.String roleClassNames)
```
    Sets the list of comma-delimited classes that represent roles. The classes in the list must implement java.security.Principal. The supplied list of classes will be parsed when LifecycleBase.start() is called.
  - parseClassNames
```
protected void parseClassNames(java.lang.String classNamesString,
                   java.util.List<java.lang.String> classNamesList)
```
    Parses a comma-delimited list of class names, and store the class names in the provided List. Each class must implement java.security.Principal.
    
    Parameters:
    classNamesString - a comma-delimited list of fully qualified class names.
    classNamesList - the list in which the class names will be stored. The list is cleared before being populated.
  - getUserClassNames
```
public java.lang.String getUserClassNames()
```
  - setUserClassNames
```
public void setUserClassNames(java.lang.String userClassNames)
```
    Sets the list of comma-delimited classes that represent individual users. The classes in the list must implement java.security.Principal. The supplied list of classes will be parsed when LifecycleBase.start() is called.
  - getInfo
```
public java.lang.String getInfo()
```
    Return descriptive information about this Realm implementation and the corresponding version number, in the format <description>/<version>.
    
    Specified by:
    
    getInfo in interface Realm
    
    Overrides:
    
    getInfo in class RealmBase
  - authenticate
```
public java.security.Principal authenticate(java.lang.String username,
                                   java.lang.String credentials)
```
    Return the Principal associated with the specified username and credentials, if there is one; otherwise return null.
    
    Specified by:
    
    authenticate in interface Realm
    
    Overrides:
    
    authenticate in class RealmBase
    
    Parameters:
    username - Username of the Principal to look up
    credentials - Password or other credentials to use in authenticating this username
  - authenticate
```
public java.security.Principal authenticate(java.lang.String username,
                                   java.lang.String clientDigest,
                                   java.lang.String nonce,
                                   java.lang.String nc,
                                   java.lang.String cnonce,
                                   java.lang.String qop,
                                   java.lang.String realmName,
                                   java.lang.String md5a2)
```
    Return the Principal associated with the specified username and digest, if there is one; otherwise return null.
    
    Specified by:
    
    authenticate in interface Realm
    
    Overrides:
    
    authenticate in class RealmBase
    
    Parameters:
    username - Username of the Principal to look up
    clientDigest - Digest to use in authenticating this username
    nonce - Server generated nonce
    nc - Nonce count
    cnonce - Client generated nonce
    qop - Quality of protection applied to the message
    realmName - Realm name
    md5a2 - Second MD5 digest used to calculate the digest MD5(Method + ":" + uri)
  - authenticate
```
protected java.security.Principal authenticate(java.lang.String username,
                                   javax.security.auth.callback.CallbackHandler callbackHandler)
```
    Perform the actual JAAS authentication
  - getName
```
protected java.lang.String getName()
```
    Return a short name for this Realm implementation.
    
    Specified by:
    
    getName in class RealmBase
  - getPassword
```
protected java.lang.String getPassword(java.lang.String username)
```
    Return the password associated with the given principal's user name. This always returns null as the JAASRealm has no way of obtaining this information.
    
    Specified by:
    
    getPassword in class RealmBase
  - getPrincipal
```
protected java.security.Principal getPrincipal(java.lang.String username)
```
    Return the Principal associated with the given user name.
    
    Specified by:
    
    getPrincipal in class RealmBase
  - createPrincipal
```
protected java.security.Principal createPrincipal(java.lang.String username,
                                      javax.security.auth.Subject subject,
                                      javax.security.auth.login.LoginContext loginContext)
```
    Identify and return a java.security.Principal instance representing the authenticated user for the specified Subject. The Principal is constructed by scanning the list of Principals returned by the JAASLoginModule. The first Principal object that matches one of the class names supplied as a "user class" is the user Principal. This object is returned to the caller. Any remaining principal objects returned by the LoginModules are mapped to roles, but only if their respective classes match one of the "role class" classes. If a user Principal cannot be constructed, return null.
    
    Parameters:
    subject - The Subject representing the logged-in user
    loginContext - Associated with the Principal so LoginContext.logout() can be called later
  - makeLegalForJAAS
```
protected java.lang.String makeLegalForJAAS(java.lang.String src)
```
    Ensure the given name is legal for JAAS configuration. Added for Bugzilla 30869, made protected for easy customization in case my implementation is insufficient, which I think is very likely.
    
    Parameters:
    src - The name to validate
    
    Returns:
    A string that's a valid JAAS realm name
  - startInternal
```
protected void startInternal()
                      throws LifecycleException
```
    Prepare for the beginning of active use of the public methods of this component and implement the requirements of LifecycleBase.startInternal().
    
    Overrides:
    
    startInternal in class RealmBase
    
    Throws:
    
    LifecycleException - if this component detects a fatal error that prevents this component from being used
  - getConfig
```
protected javax.security.auth.login.Configuration getConfig()
```
    Load custom JAAS Configuration

Class JAASRealm

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.catalina.realm.RealmBase

Field Summary

Fields inherited from class org.apache.catalina.realm.RealmBase

Fields inherited from class org.apache.catalina.util.LifecycleMBeanBase

Fields inherited from interface org.apache.catalina.Lifecycle

Constructor Summary

Method Summary

Methods inherited from class org.apache.catalina.realm.RealmBase

Methods inherited from class org.apache.catalina.util.LifecycleMBeanBase

Methods inherited from class org.apache.catalina.util.LifecycleBase

Methods inherited from class java.lang.Object

Field Detail

appName

info

name

roleClasses

userClasses

useContextClassLoader

configFile

jaasConfiguration

jaasConfigurationLoaded

roleClassNames

userClassNames

Constructor Detail

JAASRealm

Method Detail

getConfigFile

setConfigFile

setAppName

getAppName

setUseContextClassLoader

isUseContextClassLoader

setContainer

getRoleClassNames

setRoleClassNames

parseClassNames

getUserClassNames

setUserClassNames

getInfo

authenticate

authenticate

authenticate

getName

getPassword

getPrincipal

createPrincipal

makeLegalForJAAS

startInternal

getConfig