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/*-
* ============LICENSE_START=======================================================
* OPENECOMP - MSO
* ================================================================================
* Copyright (C) 2017 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.openecomp.mso.bpmn.util;
import java.security.GeneralSecurityException;
import java.security.NoSuchAlgorithmException;
import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
// import com.att.util.common.RttpBasicAuth;
//Need to add BPM error handler
/**
* CryptoUtils adapted from RTTP client.
*
*/
public class CryptoUtils {
public static final String AES = "AES";
/**
* encrypt a value and generate a keyfile
* if the keyfile is not found then a new one is created
* @throws GeneralSecurityException
* @throws IOException
*/
public static String encrypt(String value, String keyString) throws GeneralSecurityException
{
SecretKeySpec sks = getSecretKeySpec(keyString);
Cipher cipher = Cipher.getInstance(CryptoUtils.AES);
cipher.init(Cipher.ENCRYPT_MODE, sks, cipher.getParameters());
byte[] encrypted = cipher.doFinal(value.getBytes());
return byteArrayToHexString(encrypted);
}
/**
* decrypt a value
* @throws GeneralSecurityException
* @throws IOException
*/
public static String decrypt(String message, String keyString) throws GeneralSecurityException
{
SecretKeySpec sks = getSecretKeySpec(keyString);
Cipher cipher = Cipher.getInstance(CryptoUtils.AES);
cipher.init(Cipher.DECRYPT_MODE, sks);
byte[] decrypted = cipher.doFinal(hexStringToByteArray(message));
return new String(decrypted);
}
private static SecretKeySpec getSecretKeySpec(String keyString) throws NoSuchAlgorithmException
{
byte [] key = hexStringToByteArray(keyString);
SecretKeySpec sks = new SecretKeySpec(key, CryptoUtils.AES);
return sks;
}
private static String byteArrayToHexString(byte[] b){
StringBuffer sb = new StringBuffer(b.length * 2);
for (int i = 0; i < b.length; i++){
int v = b[i] & 0xff;
if (v < 16) {
sb.append('0');
}
sb.append(Integer.toHexString(v));
}
return sb.toString().toUpperCase();
}
private static byte[] hexStringToByteArray(String s) {
byte[] b = new byte[s.length() / 2];
for (int i = 0; i < b.length; i++){
int index = i * 2;
int v = Integer.parseInt(s.substring(index, index + 2), 16);
b[i] = (byte)v;
}
return b;
}
/**
* Not Used...
*
* Call Rttp utility jar to encrypt pwd
* @param clearPassword
* @return
* @throws GeneralSecurityException
* @throws Exception
*
public static String encryptRttpPwd(String clearPassword) throws GeneralSecurityException {
try {
return RttpBasicAuth.encrypt(clearPassword);
} catch (Exception e) {
// wrap generic exception
throw new GeneralSecurityException(e);
}
}
*/
}
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