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