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/*
* Copyright © 2017-2019 AT&T Intellectual Property.
* Modifications Copyright © 2018 IBM.
*
* 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.
*
*
* Unless otherwise specified, all documentation contained herein is licensed
* under the Creative Commons License, Attribution 4.0 Intl. (the "License");
* you may not use this documentation except in compliance with the License.
* You may obtain a copy of the License at
*
* https://creativecommons.org/licenses/by/4.0/
*
* Unless required by applicable law or agreed to in writing, documentation
* 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.onap.optf.cmso.common;
import com.att.eelf.configuration.EELFLogger;
import com.att.eelf.configuration.EELFManager;
import java.util.Base64;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.env.Environment;
import org.springframework.stereotype.Component;
import java.security.SecureRandom;
/**
* The Class PropertiesManagement.
*/
@Component
public class PropertiesManagement {
private static EELFLogger debug = EELFManager.getInstance().getDebugLogger();
private static EELFLogger errors = EELFManager.getInstance().getErrorLogger();
private static final String algorithm = "AES";
private static final String cipherMode = "GCM";
private static final String paddingScheme = "NoPadding";
private static final String transformation = algorithm + "/" + cipherMode + "/" + paddingScheme;
private static final SecureRandom random = new SecureRandom();
@Autowired
Environment env;
/**
* Gets the property.
*
* @param key the key
* @param defaultValue the default value
* @return the property
*/
public String getProperty(String key, String defaultValue) {
String value = env.getProperty(key, defaultValue);
value = getDecryptedValue(value);
return value;
}
/**
* Gets the decrypted value.
*
* @param value the value
* @return the decrypted value
*/
public static String getDecryptedValue(String value) {
if (value.startsWith("enc:")) {
String secret = getSecret();
value = decrypt(secret,value.substring(4));
}
return value;
}
/**
* Gets the encrypted value.
*
* @param value the value
* @return the encrypted value
*/
public static String getEncryptedValue(String value) {
String secret = getSecret();
value = encrypt(secret, value);
return value;
}
private static final String encrypt(String key, String value) {
try {
byte[] bytesIV = new byte[16];
random.nextBytes(bytesIV);
IvParameterSpec iv = new IvParameterSpec(bytesIV);
SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");
Cipher cipher = Cipher.getInstance(transformation);
cipher.init(Cipher.ENCRYPT_MODE, skeySpec, iv);
byte[] encrypted = cipher.doFinal(value.getBytes());
return Base64.getEncoder().encodeToString(encrypted);
} catch (Exception ex) {
errors.error("Unexpected exception {0}", ex.getMessage());
debug.debug("Unexpected exception", ex);
}
return null;
}
private static final String decrypt(String key, String encrypted) {
try {
byte[] bytesIV = new byte[16];
random.nextBytes(bytesIV);
IvParameterSpec iv = new IvParameterSpec(bytesIV);
SecretKeySpec skeySpec = new SecretKeySpec(key.getBytes("UTF-8"), "AES");
Cipher cipher = Cipher.getInstance(transformation);
cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
byte[] original = cipher.doFinal(Base64.getDecoder().decode(encrypted));
return new String(original);
} catch (Exception ex) {
errors.error("Unexpected exception {0}", ex.getMessage());
debug.debug("Unexpected exception", ex);
}
return null;
}
private static String getSecret() {
return "ONAPCMSOSECRETIV";
}
}
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