2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2017 AT&T Intellectual Property. All rights
7 * ================================================================================
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
12 * http://www.apache.org/licenses/LICENSE-2.0
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 * ============LICENSE_END============================================
20 * ===================================================================
21 * ECOMP is a trademark and service mark of AT&T Intellectual Property.
24 package org.onap.clamp.clds.util;
26 import java.security.GeneralSecurityException;
28 import javax.annotation.PostConstruct;
29 import javax.crypto.Cipher;
30 import javax.crypto.spec.SecretKeySpec;
32 import org.springframework.beans.factory.annotation.Autowired;
33 import org.springframework.core.env.Environment;
34 import org.springframework.stereotype.Component;
37 * CryptoUtils for encrypting/decrypting string based on a Key defined in
38 * application.properties (Spring config file).
41 @Component("CryptoUtils")
42 public final class CryptoUtils {
43 public static final String AES = "AES";
44 public static final String KEY_PARAM = "org.onap.clamp.encryption.aes.key";
46 private Environment springEnv;
47 private SecretKeySpec secretKeySpec;
55 secretKeySpec = getSecretKeySpec(springEnv.getProperty(KEY_PARAM));
59 * Encrypt a value based on the Clamp Encryption Key.
62 * @return The encrypted string
63 * @throws GeneralSecurityException
64 * In case of issue with the encryption
66 public String encrypt(String value) throws GeneralSecurityException {
67 Cipher cipher = Cipher.getInstance(CryptoUtils.AES);
68 cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, cipher.getParameters());
69 byte[] encrypted = cipher.doFinal(value.getBytes());
70 return byteArrayToHexString(encrypted);
77 * The encrypted string that must be decrypted using the Clamp
79 * @return The String decrypted
80 * @throws GeneralSecurityException
81 * In case of issue with the encryption
83 public String decrypt(String message) throws GeneralSecurityException {
84 Cipher cipher = Cipher.getInstance(CryptoUtils.AES);
85 cipher.init(Cipher.DECRYPT_MODE, secretKeySpec);
86 byte[] decrypted = cipher.doFinal(hexStringToByteArray(message));
87 return new String(decrypted);
90 private SecretKeySpec getSecretKeySpec(String keyString) {
91 byte[] key = hexStringToByteArray(keyString);
92 return new SecretKeySpec(key, CryptoUtils.AES);
95 private String byteArrayToHexString(byte[] b) {
96 StringBuilder sb = new StringBuilder(b.length * 2);
97 for (int i = 0; i < b.length; i++) {
102 sb.append(Integer.toHexString(v));
104 return sb.toString().toUpperCase();
107 private byte[] hexStringToByteArray(String s) {
108 byte[] b = new byte[s.length() / 2];
109 for (int i = 0; i < b.length; i++) {
111 int v = Integer.parseInt(s.substring(index, index + 2), 16);