/*
* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
*
* Licensed 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.springframework.security.authentication.rcp;
import java.util.Collection;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.security.authentication.AuthenticationProvider;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.util.Assert;
/**
* Client-side object which queries a {@link RemoteAuthenticationManager} to validate an
* authentication request.
* <p>
* A new <code>Authentication</code> object is created by this class comprising the
* request <code>Authentication</code> object's <code>principal</code>,
* <code>credentials</code> and the <code>GrantedAuthority</code>[]s returned by the
* <code>RemoteAuthenticationManager</code>.
* <p>
* The <code>RemoteAuthenticationManager</code> should not require any special username or
* password setting on the remoting client proxy factory to execute the call. Instead the
* entire authentication request must be encapsulated solely within the
* <code>Authentication</code> request object. In practical terms this means the
* <code>RemoteAuthenticationManager</code> will <b>not</b> be protected by BASIC or any
* other HTTP-level authentication.
* </p>
* <p>
* If authentication fails, a <code>RemoteAuthenticationException</code> will be thrown.
* This exception should be caught and displayed to the user, enabling them to retry with
* alternative credentials etc.
* </p>
*
* @author Ben Alex
*/
public class RemoteAuthenticationProvider implements AuthenticationProvider,
InitializingBean {
// ~ Instance fields
// ================================================================================================
private RemoteAuthenticationManager remoteAuthenticationManager;
// ~ Methods
// ========================================================================================================
public void afterPropertiesSet() throws Exception {
Assert.notNull(this.remoteAuthenticationManager,
"remoteAuthenticationManager is mandatory");
}
public Authentication authenticate(Authentication authentication)
throws AuthenticationException {
String username = authentication.getPrincipal().toString();
Object credentials = authentication.getCredentials();
String password = credentials == null ? null : credentials.toString();
Collection<? extends GrantedAuthority> authorities = remoteAuthenticationManager
.attemptAuthentication(username, password);
return new UsernamePasswordAuthenticationToken(username, password, authorities);
}
public RemoteAuthenticationManager getRemoteAuthenticationManager() {
return remoteAuthenticationManager;
}
public void setRemoteAuthenticationManager(
RemoteAuthenticationManager remoteAuthenticationManager) {
this.remoteAuthenticationManager = remoteAuthenticationManager;
}
public boolean supports(Class<?> authentication) {
return (UsernamePasswordAuthenticationToken.class
.isAssignableFrom(authentication));
}
}