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/**
 * Copyright 2010-2014 The Kuali Foundation
 *
 * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
 *
 * 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.kuali.common.util.encrypt.jasypt;

import static org.kuali.common.util.base.Exceptions.illegalArgument;
import static org.kuali.common.util.base.Precondition.checkNotBlank;
import static org.kuali.common.util.base.Precondition.checkNotNull;

import org.jasypt.util.text.BasicTextEncryptor;
import org.jasypt.util.text.StrongTextEncryptor;
import org.jasypt.util.text.TextEncryptor;
import org.kuali.common.util.encrypt.EncryptionContext;
import org.kuali.common.util.encrypt.EncryptionStrength;

public class Jasypt {

	/**
	 * Return a BasicTextEncryptor or StrongTextEncryptor depending on what strength is set to
	 */
	public static TextEncryptor buildTextEncryptor(EncryptionContext context) {
		return buildTextEncryptor(context.getPassword(), context.getStrength());
	}

	/**
	 * Return a BasicTextEncryptor or StrongTextEncryptor depending on what strength is set to
	 */
	public static TextEncryptor buildTextEncryptor(String password, EncryptionStrength strength) {
		checkNotBlank(password, "password");
		checkNotNull(strength, "strength");
		switch (strength) {
		case BASIC_ENCRYPTION_STRENGTH:
			BasicTextEncryptor basic = new BasicTextEncryptor();
			basic.setPassword(password);
			return basic;
		case STRONG_ENCRYPTION_STRENGTH:
			StrongTextEncryptor strong = new StrongTextEncryptor();
			strong.setPassword(password);
			return strong;
		default:
			throw illegalArgument("encryption strength [%s] is unknown", strength);
		}
	}

}