diff options
Diffstat (limited to 'appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/utils/EncryptionTool.java')
-rw-r--r-- | appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/utils/EncryptionTool.java | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/utils/EncryptionTool.java b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/utils/EncryptionTool.java new file mode 100644 index 000000000..61b3cd51c --- /dev/null +++ b/appc-config/appc-flow-controller/provider/src/main/java/org/onap/appc/flow/controller/utils/EncryptionTool.java @@ -0,0 +1,170 @@ +/*- + * ============LICENSE_START======================================================= + * ONAP : APPC + * ================================================================================ + * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * Copyright (C) 2017 Amdocs + * ============================================================================= + * 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. + * + * ECOMP is a trademark and service mark of AT&T Intellectual Property. + * ============LICENSE_END========================================================= + */ + +package org.onap.appc.flow.controller.utils; + + +import java.security.Provider; +import java.security.Provider.Service; +import java.security.Security; + +import org.jasypt.contrib.org.apache.commons.codec_1_3.binary.Base64; +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 { + + /** + * The prefix we insert onto any data we encrypt so that we can tell if it is encrpyted later and + * therefore decrypt it + */ + public static final String ENCRYPTED_VALUE_PREFIX = "enc:"; + + /** + * The instance of the encryption utility object + */ + private static EncryptionTool instance = null; + + /** + * 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'}; + + + + /** + * Get an instance of the EncryptionTool + * + * @return The encryption tool to be used + */ + public static final synchronized EncryptionTool getInstance() { + if (instance == null) { + instance = new EncryptionTool(); + } + return instance; + } + + /** + * Create the EncryptionTool instance + */ + private EncryptionTool() { + + StringBuilder sb = new StringBuilder("Found the following security algorithms:"); + for (Provider p : Security.getProviders()) { + for (Service s : p.getServices()) { + String algo = s.getAlgorithm(); + sb.append(String.format("%n -Algorithm [ %s ] in provider [ %s ] and service [ %s ]", algo, p.getName(), + s.getClassName())); + } + } + if (LOG.isDebugEnabled()) { + LOG.debug(sb.toString()); + } + } + + /** + * 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. + */ + public synchronized String decrypt(String cipherText) { + if (isEncrypted(cipherText)) { + String encValue = cipherText.substring(ENCRYPTED_VALUE_PREFIX.length()); + 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. + */ + 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 new byte[0]; + } + + 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; + } + +} |