--- /dev/null
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP : APP-C
+ * ================================================================================
+ * 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.onap.appc.ccadaptor;
+
+import java.security.Provider;
+import java.security.Provider.Service;
+import java.security.Security;
+
+import javax.crypto.Cipher;
+
+import org.jasypt.contrib.org.apache.commons.codec_1_3.binary.Base64;
+import org.jasypt.util.text.BasicTextEncryptor;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * This class is used to encapsulate the encryption and decryption support in one place and to provide a utility to
+ * encrypt and decrypt data.
+ */
+public class EncryptionTool {
+
+ /**
+ * This lock object is used ONLY if the singleton has not been set up.
+ */
+ private static final Object lock = new Object();
+
+ /**
+ * The salt is used to initialize the PBE (password Based Encrpytion) algorithm.
+ */
+ private static final byte[] DEFAULT_SALT = {
+ (byte) 0xc7, (byte) 0x73, (byte) 0x21, (byte) 0x8c, (byte) 0x7e, (byte) 0xc8, (byte) 0xee, (byte) 0x99
+ };
+
+ /**
+ * The prefix we insert onto any data we encrypt so that we can tell if it is encrpyted later and therefore decrypt
+ * it
+ */
+ @SuppressWarnings("nls")
+ public static final String ENCRYPTED_VALUE_PREFIX = "enc:";
+
+ /**
+ * The instance of the encryption utility object
+ */
+ private static EncryptionTool instance = null;
+
+ /**
+ * The iteration count used to initialize the PBE algorithm and to generate the key spec
+ */
+ private static final int ITERATION_COUNT = 20;
+
+ /**
+ * The logger for this class.
+ */
+ private static final Logger LOG = LoggerFactory.getLogger(EncryptionTool.class);
+
+ /**
+ * The secret passphrase (PBE) that we use to perform encryption and decryption. The algorithm we are using is a
+ * symmetrical cipher.
+ */
+ private static char[] secret = {
+ 'C', '_', 'z', 'l', '!', 'K', '!', '4', '?', 'O', 'z', 'E', 'K', 'E', '>', 'U', 'R', '/', '%', 'Y', '\\', 'f',
+ 'b', '"', 'e', 'n', '{', '"', 'l', 'U', 'F', '+', 'E', '\'', 'R', 'T', 'p', '1', 'V', '4', 'l', 'a', '9', 'w',
+ 'v', '5', 'Z', '#', 'i', 'V', '"', 'd', 'l', '!', 'L', 'M', 'g', 'L', 'Q', '{', 'v', 'v', 'K', 'V'
+ };
+
+ /**
+ * The algorithm to encrypt and decrpyt data is "Password (or passphrase) Based Encryption with Message Digest #5
+ * and the Data Encryption Standard", i.e., PBEWithMD5AndDES.
+ */
+ @SuppressWarnings("nls")
+ private static final String SECURITY_ALGORITHM = "PBEWITHMD5AND256BITAES";// "PBEWithMD5AndDES";
+
+ /**
+ * The decryption cipher object
+ */
+ private Cipher decryptCipher = null;
+
+ /**
+ * The encryption cipher object
+ */
+ private Cipher encryptCipher = null;
+
+ private BasicTextEncryptor encryptor;
+
+ /**
+ * Get an instance of the EncryptionTool
+ *
+ * @return The encryption tool to be used
+ */
+ public static final EncryptionTool getInstance() {
+ if (instance == null) {
+ synchronized (lock) {
+ if (instance == null) {
+ instance = new EncryptionTool();
+ }
+ }
+ }
+ return instance;
+ }
+
+ /**
+ * Create the EncryptionTool instance
+ */
+ @SuppressWarnings("nls")
+ private EncryptionTool() {
+ // encryptor = new BasicTextEncryptor();
+ // encryptor.setPassword(secret.toString());
+ String out = "Found the following security algorithms:";
+ for (Provider p : Security.getProviders()) {
+ for (Service s : p.getServices()) {
+ String algo = s.getAlgorithm();
+ out +=
+ String.format("\n -Algorithm [ %s ] in provider [ %s ] and service [ %s ]", algo, p.getName(),
+ s.getClassName());
+ }
+ }
+ LOG.debug(out);
+ }
+
+ /**
+ * Decrypt the provided encrypted text
+ *
+ * @param cipherText
+ * THe cipher text to be decrypted. If the ciphertext is not encrypted, then it is returned as is.
+ * @return the clear test of the (possibly) encrypted value. The original value if the string is not encrypted.
+ */
+ @SuppressWarnings("nls")
+ public synchronized String decrypt(String cipherText) {
+ if (isEncrypted(cipherText)) {
+ String encValue = cipherText.substring(ENCRYPTED_VALUE_PREFIX.length());
+ // return encryptor.decrypt(encValue);
+ byte[] plainByte = Base64.decodeBase64(encValue.getBytes());
+ byte[] decryptByte = xorWithSecret(plainByte);
+ return new String(decryptByte);
+ } else {
+ return cipherText;
+ }
+
+ }
+
+ /**
+ * Encrypt the provided clear text
+ *
+ * @param clearText
+ * The clear text to be encrypted
+ * @return the encrypted text. If the clear text is empty (null or zero length), then an empty string is returned.
+ * If the clear text is already encrypted, it is not encrypted again and is returned as is. Otherwise, the
+ * clear text is encrypted and returned.
+ */
+ @SuppressWarnings("nls")
+ public synchronized String encrypt(String clearText) {
+ if (clearText != null) {
+ byte[] encByte = xorWithSecret(clearText.getBytes());
+ String encryptedValue = new String(Base64.encodeBase64(encByte));
+ return ENCRYPTED_VALUE_PREFIX + encryptedValue;
+ } else {
+ return null;
+ }
+ }
+
+ /**
+ * Is a value encrypted? A value is considered to be encrypted if it begins with the
+ * {@linkplain #ENCRYPTED_VALUE_PREFIX encrypted value prefix}.
+ *
+ * @param value
+ * the value to check.
+ * @return true/false;
+ */
+ private static boolean isEncrypted(final String value) {
+ return value != null && value.startsWith(ENCRYPTED_VALUE_PREFIX);
+ }
+
+ /**
+ * XORs the input byte array with the secret key, padding 0x0 to the end of the secret key if the input is longer
+ * and returns a byte array the same size as input
+ *
+ * @param inp
+ * The byte array to be XORed with secret
+ * @return A byte array the same size as inp or null if input is null.
+ */
+ private byte[] xorWithSecret(byte[] inp) {
+ if (inp == null) {
+ return null;
+ }
+
+ byte[] secretBytes = new String(secret).getBytes();
+ int size = inp.length;
+
+ byte[] out = new byte[size];
+ for (int i = 0; i < size; i++) {
+ out[i] = (byte) ((inp[i]) ^ (secretBytes[i % secretBytes.length]));
+ }
+ return out;
+ }
+
+}
Code Review / appc.git / blobdiff