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/*-
* ============LICENSE_START=======================================================
* ONAP Policy Engine
* ================================================================================
* Copyright (C) 2019 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.utils;
import java.security.GeneralSecurityException;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.commons.lang3.StringUtils;
import org.onap.policy.common.logging.flexlogger.FlexLogger;
import org.onap.policy.common.logging.flexlogger.Logger;
import org.onap.policy.common.utils.security.CryptoUtils;
public class PeCryptoUtils {
private static Logger logger = FlexLogger.getLogger(PeCryptoUtils.class);
private static final String PROP_AES_KEY = "org.onap.policy.encryption.aes.key";
private static CryptoUtils cryptoUtils = null;
private static String secretKey = System.getenv("AES_ENCRYPTION_KEY");
private static final Map<String, String> decryptCache = new ConcurrentHashMap<>();
private static final Map<String, String> encryptCache = new ConcurrentHashMap<>();
private PeCryptoUtils() {}
/**
* Inits the aes key.
*
* @param theSecretKey the the secret key
*/
public static synchronized void initAesKey(String theSecretKey) {
String secKey = theSecretKey;
if (cryptoUtils == null) {
if (StringUtils.isBlank(secKey)) {
secKey = System.getProperty(PROP_AES_KEY);
}
if (StringUtils.isBlank(secKey)) {
secKey = secretKey;
}
cryptoUtils = new CryptoUtils(secKey);
}
}
/**
* Encrypt a value based on the Policy Encryption Key.
*
* @param value The plain text string
* @return The encrypted String
*/
public static String encrypt(String value) {
if (cryptoUtils == null || StringUtils.isBlank(value)) {
return value;
}
return encryptCache.computeIfAbsent(value, k -> {
try {
return cryptoUtils.encrypt(k);
} catch (GeneralSecurityException e) {
logger.error("Could not decrypt value - exception: ", e);
return value;
}
});
}
/**
* Decrypt a value based on the Policy Encryption Key if string begin with 'enc:'.
*
* @param value The encrypted string that must be decrypted using the Policy Encryption Key
* @return The String decrypted if string begin with 'enc:'
*/
public static String decrypt(String value) {
if (cryptoUtils == null || StringUtils.isBlank(value)) {
return value;
}
return decryptCache.computeIfAbsent(value, k -> {
try {
return cryptoUtils.decrypt(k);
} catch (GeneralSecurityException e) {
logger.error("Could not decrypt value - exception: ", e);
return value;
}
});
}
}
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