GenericPrincipal.java
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.catalina.realm;
import java.io.Serializable;
import java.security.Principal;
import java.util.Arrays;
import java.util.Collections;
import java.util.Enumeration;
import java.util.List;
import java.util.Map;
import javax.security.auth.login.LoginContext;
import org.apache.catalina.TomcatPrincipal;
import org.ietf.jgss.GSSCredential;
/**
* Generic implementation of <strong>java.security.Principal</strong> that is available for use by <code>Realm</code>
* implementations.
*
* @author Craig R. McClanahan
*/
public class GenericPrincipal implements TomcatPrincipal, Serializable {
private static final long serialVersionUID = 1L;
// ----------------------------------------------------------- Constructors
/**
* Construct a new Principal, associated with the specified Realm, for the specified username, with no roles.
*
* @param name The username of the user represented by this Principal
*/
public GenericPrincipal(String name) {
this(name, null);
}
/**
* Construct a new Principal, associated with the specified Realm, for the specified username, with the specified
* role names (as Strings).
*
* @param name The username of the user represented by this Principal
* @param roles List of roles (must be Strings) possessed by this user
*/
public GenericPrincipal(String name, List<String> roles) {
this(name, roles, null);
}
/**
* Construct a new Principal, associated with the specified Realm, for the specified username, with the specified
* role names (as Strings).
*
* @param name The username of the user represented by this Principal
* @param roles List of roles (must be Strings) possessed by this user
* @param userPrincipal - the principal to be returned from the request getUserPrincipal call if not null; if null,
* this will be returned
*/
public GenericPrincipal(String name, List<String> roles, Principal userPrincipal) {
this(name, roles, userPrincipal, null);
}
/**
* Construct a new Principal, associated with the specified Realm, for the specified username, with the specified
* role names (as Strings).
*
* @param name The username of the user represented by this Principal
* @param roles List of roles (must be Strings) possessed by this user
* @param userPrincipal - the principal to be returned from the request getUserPrincipal call if not null; if null,
* this will be returned
* @param loginContext - If provided, this will be used to log out the user at the appropriate time
*/
public GenericPrincipal(String name, List<String> roles, Principal userPrincipal, LoginContext loginContext) {
this(name, roles, userPrincipal, loginContext, null, null);
}
/**
* Construct a new Principal, associated with the specified Realm, for the specified username, with the specified
* role names (as Strings).
*
* @param name The username of the user represented by this Principal
* @param roles List of roles (must be Strings) possessed by this user
* @param userPrincipal - the principal to be returned from the request getUserPrincipal call if not null; if null,
* this will be returned
* @param loginContext - If provided, this will be used to log out the user at the appropriate time
* @param gssCredential - If provided, the user's delegated credentials
* @param attributes - If provided, additional attributes associated with this Principal
*/
public GenericPrincipal(String name, List<String> roles, Principal userPrincipal, LoginContext loginContext,
GSSCredential gssCredential, Map<String,Object> attributes) {
super();
this.name = name;
this.userPrincipal = userPrincipal;
if (roles == null) {
this.roles = new String[0];
} else {
this.roles = roles.toArray(new String[0]);
if (this.roles.length > 1) {
Arrays.sort(this.roles);
}
}
this.loginContext = loginContext;
this.gssCredential = gssCredential;
this.attributes = attributes != null ? Collections.unmodifiableMap(attributes) : null;
}
// -------------------------------------------------------------- Properties
/**
* The username of the user represented by this Principal.
*/
protected final String name;
@Override
public String getName() {
return this.name;
}
/**
* The set of roles associated with this user.
*/
protected final String[] roles;
public String[] getRoles() {
return this.roles.clone();
}
/**
* The authenticated Principal to be exposed to applications.
*/
protected final Principal userPrincipal;
@Override
public Principal getUserPrincipal() {
if (userPrincipal != null) {
return userPrincipal;
} else {
return this;
}
}
/**
* The JAAS LoginContext, if any, used to authenticate this Principal. Kept so we can call logout().
*/
protected final transient LoginContext loginContext;
/**
* The user's delegated credentials.
*/
protected transient GSSCredential gssCredential = null;
@Override
public GSSCredential getGssCredential() {
return this.gssCredential;
}
protected void setGssCredential(GSSCredential gssCredential) {
this.gssCredential = gssCredential;
}
/**
* The additional attributes associated with this Principal.
*/
protected final Map<String,Object> attributes;
// ---------------------------------------------------------- Public Methods
/**
* Does the user represented by this Principal possess the specified role?
*
* @param role Role to be tested
*
* @return <code>true</code> if this Principal has been assigned the given role, otherwise <code>false</code>
*/
public boolean hasRole(String role) {
if ("*".equals(role)) { // Special 2.4 role meaning everyone
return true;
}
if (role == null) {
return false;
}
return Arrays.binarySearch(roles, role) >= 0;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder("GenericPrincipal[");
sb.append(this.name);
sb.append('(');
for (String role : roles) {
sb.append(role).append(',');
}
sb.append(")]");
return sb.toString();
}
@Override
public void logout() throws Exception {
if (loginContext != null) {
loginContext.logout();
}
if (gssCredential != null) {
gssCredential.dispose();
}
}
@Override
public Object getAttribute(String name) {
if (attributes == null || name == null) {
return null;
}
return attributes.get(name);
}
@Override
public Enumeration<String> getAttributeNames() {
if (attributes == null) {
return Collections.emptyEnumeration();
}
return Collections.enumeration(attributes.keySet());
}
// ----------------------------------------------------------- Serialization
private Object writeReplace() {
return new SerializablePrincipal(name, roles, userPrincipal, attributes);
}
private static class SerializablePrincipal implements Serializable {
private static final long serialVersionUID = 1L;
private final String name;
private final String[] roles;
private final Principal principal;
private final Map<String,Object> attributes;
SerializablePrincipal(String name, String[] roles, Principal principal, Map<String,Object> attributes) {
this.name = name;
this.roles = roles;
if (principal instanceof Serializable) {
this.principal = principal;
} else {
this.principal = null;
}
this.attributes = attributes;
}
private Object readResolve() {
return new GenericPrincipal(name, Arrays.asList(roles), principal, null, null, attributes);
}
}
}