/*
 * Copyright 2005-2014 the original author or authors.
 *
 * 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.ws.soap.security.xwss.callback.jaas;

import java.security.Principal;
import java.util.Iterator;
import java.util.Map;

import javax.security.auth.Subject;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.login.LoginException;
import javax.security.auth.spi.LoginModule;
import javax.security.auth.x500.X500Principal;

public class CertificateLoginModule implements LoginModule {

	private Subject subject;

	private boolean loginSuccessful = false;

	@Override
	public boolean abort() {
		return true;
	}

	@Override
	public boolean commit() {
		if (!loginSuccessful) {
			subject.getPrincipals().clear();
			subject.getPrivateCredentials().clear();
			return false;
		}
		return true;
	}

	@Override
	public void initialize(Subject subject,
						   CallbackHandler callbackHandler,
						   Map<String,?> sharedState,
						   Map<String,?> options) {
		this.subject = subject;
	}

	@Override
	public boolean login() throws LoginException {
		if (subject == null) {
			return false;
		}

		String name = getName(subject);

		loginSuccessful = "CN=Arjen Poutsma,OU=Spring-WS,O=Interface21,L=Amsterdam,ST=Unknown,C=NL".equals(name);
		return loginSuccessful;
	}

	@Override
	public boolean logout() {
		subject.getPrincipals().clear();
		subject.getPrivateCredentials().clear();
		return true;
	}

	private String getName(Subject subject) {
		for (Iterator<Principal> iterator = subject.getPrincipals().iterator(); iterator.hasNext();) {
			Principal principal = iterator.next();
			if (principal instanceof X500Principal) {
				return principal.getName();
			}
		}
		return null;
	}
}