/*
 * Copyright (c) 2010-2016 Evolveum
 *
 * 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 com.evolveum.midpoint.model.impl.security;

import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.UnsupportedCallbackException;

import org.apache.wss4j.common.ext.WSPasswordCallback;

import java.io.IOException;

import com.evolveum.midpoint.schema.constants.SchemaConstants;
import com.evolveum.midpoint.security.api.ConnectionEnvironment;
import com.evolveum.midpoint.util.logging.Trace;
import com.evolveum.midpoint.util.logging.TraceManager;

/**
 * @author Igor Farinic
 * @author Radovan Semancik
 */
public class PasswordCallback implements CallbackHandler {
	
	private static final Trace LOGGER = TraceManager.getTrace(PasswordCallback.class);

    private PasswordAuthenticationEvaluatorImpl passwordAuthenticationEvaluatorImpl;

    public PasswordCallback(PasswordAuthenticationEvaluatorImpl passwordAuthenticationEvaluatorImpl) {
        this.passwordAuthenticationEvaluatorImpl = passwordAuthenticationEvaluatorImpl;
    }

    public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
    	LOGGER.trace("Invoked PasswordCallback with {} callbacks: {}", callbacks.length, callbacks);
        WSPasswordCallback pc = (WSPasswordCallback) callbacks[0];

        String username = pc.getIdentifier();
        String wssPasswordType = pc.getType();
        LOGGER.trace("Username: '{}', Password type: {}", username, wssPasswordType);
        
        try {
        	ConnectionEnvironment connEnv = new ConnectionEnvironment();
        	connEnv.setChannel(SchemaConstants.CHANNEL_WEB_SERVICE_URI);
        	pc.setPassword(passwordAuthenticationEvaluatorImpl.getAndCheckUserPassword(connEnv, username));
        } catch (Exception e) {
        	LOGGER.trace("Exception in password callback: {}: {}", e.getClass().getSimpleName(), e.getMessage(), e);
        	throw new PasswordCallbackException("Authentication failed");
        }
   }
}