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Kuali Utilities
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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.enc;

import java.util.List;
import java.util.Properties;
import java.util.SortedSet;

import org.jasypt.util.text.TextEncryptor;
import org.kuali.common.util.Assert;
import org.kuali.common.util.PropertyUtils;

import com.google.common.collect.Sets;

/**
 * @deprecated
 */
@Deprecated
public final class DefaultEncryptionService implements EncryptionService {

	private final TextEncryptor encryptor;

	public DefaultEncryptionService(TextEncryptor encryptor) {
		Assert.noNulls(encryptor);
		this.encryptor = encryptor;
	}

	@Override
	public String encrypt(String text) {
		if (EncUtils.isEncrypted(text)) {
			return text; // It's already encrypted, just return it
		}
		Assert.notEncrypted(text);
		String encryptedText = encryptor.encrypt(text);
		return EncUtils.wrap(encryptedText);
	}

	@Override
	public String decrypt(String text) {
		if (!EncUtils.isEncrypted(text)) {
			return text; // It's not encrypted, just return it
		}
		Assert.encrypted(text);
		String unwrapped = EncUtils.unwrap(text);
		return encryptor.decrypt(unwrapped);
	}

	/**
	 * Decrypt any encrypted property values.
	 */
	@Override
	public void decrypt(Properties properties) {
		List keys = PropertyUtils.getEncryptedKeys(properties);
		for (String key : keys) {
			String encrypted = properties.getProperty(key);
			String decrypted = decrypt(encrypted);
			properties.setProperty(key, decrypted);
		}
	}

	/**
	 * Encrypt any property values that are not already encrypted.
	 */
	@Override
	public void encrypt(Properties properties) {
		SortedSet allKeys = Sets.newTreeSet(properties.stringPropertyNames());
		SortedSet encKeys = Sets.newTreeSet(PropertyUtils.getEncryptedKeys(properties));
		SortedSet keys = Sets.newTreeSet(Sets.difference(allKeys, encKeys));
		for (String key : keys) {
			String plaintext = properties.getProperty(key);
			String encrypted = encrypt(plaintext);
			properties.setProperty(key, encrypted);
		}
	}

	public TextEncryptor getEncryptor() {
		return encryptor;
	}

}