uk.co.develop4.security.codecs.Base64Codec Maven / Gradle / Ivy

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Build to keep auditors happy, by ensuring that resources in Tomcat configuration files can be encrypted or hidden so that the settings will never appear in plain text.
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/* 
 * =============================================================================
 * 
 *  Copyright (c) 2014, The Develop4 Technologies Ltd (http://www.develop4.co.uk)
 *
 * 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 uk.co.develop4.security.codecs;

import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.bouncycastle.util.encoders.Base64;
import org.jasypt.encryption.StringEncryptor;

import uk.co.develop4.security.ConfigurationException;
import uk.co.develop4.security.utils.PropertyNaming;

/**
 * 
 * @author wtimpany
 *
 */
public class Base64Codec extends BaseCodec implements Codec, StringEncryptor {
	
	private final static Logger logger = Logger.getLogger(Base64Codec.class.getName());
	
    private final String DEFAULT_NAMESPACE 		= "base64://";
    private final String DEFAULT_DESCRIPTION 	= "Base64 Codec";
    
    public Map> getRequiredParameters() {
    	Map> requiredParams = new HashMap>();
    	Set encodeParams = new HashSet();
    	Set decodeParams = new HashSet();
    	requiredParams.put("encode", encodeParams);
    	requiredParams.put("decode", decodeParams);
    	return requiredParams;
    }
    
    public Map> getOptionalParameters() {
    	Map> optionalParams = new HashMap>();
    	Set encodeParams = new HashSet(Arrays.asList(
    			PropertyNaming.PROP_LOGGING.toString()
    			));
    	Set decodeParams = new HashSet(Arrays.asList(
    			PropertyNaming.PROP_LOGGING.toString()
    			));
    	optionalParams.put("encode", encodeParams);
    	optionalParams.put("decode", decodeParams);
    	return optionalParams;
    }
    
	public Base64Codec() {
	}
	
	@Override
	public void init(Properties props)  throws ConfigurationException {
		try {
			setLoggerLevel(logger, props.getProperty(PropertyNaming.PROP_LOGGING.toString()));

			setNamespace(new Namespace(props.getProperty(PropertyNaming.PROP_NAMESPACE.toString(), DEFAULT_NAMESPACE)));	
			setDescription(props.getProperty(PropertyNaming.PROP_DESCRIPTION.toString(), DEFAULT_DESCRIPTION));
		} catch (Exception ex) {
			logger.log(Level.SEVERE, "Failed to initialized Codec: {0}", getNamespace());
			throw new ConfigurationException("Property initialization failed", ex.fillInStackTrace());
		}
	}
	
	@Override
	public String encrypt(String cleartext) {
		if (cleartext == null) {
			return cleartext;
		}
		return addNamespacePrefix(Base64.encode(cleartext.getBytes()));
	}

	@Override
	public String decrypt(String cyphertext) {
		if (cyphertext == null) {
			return cyphertext;
		}
		return new String(Base64.decode(removeNamespacePrefix(cyphertext).getBytes()));
	}
	
	public void setLoggerLevel(Level level) {
		logger.setLevel(level);
	}

}