diff options
Diffstat (limited to 'PolicyEngineUtils/src/main/java')
| -rw-r--r-- | PolicyEngineUtils/src/main/java/org/onap/policy/utils/CryptoUtils.java | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/PolicyEngineUtils/src/main/java/org/onap/policy/utils/CryptoUtils.java b/PolicyEngineUtils/src/main/java/org/onap/policy/utils/CryptoUtils.java new file mode 100644 index 000000000..5496f0d87 --- /dev/null +++ b/PolicyEngineUtils/src/main/java/org/onap/policy/utils/CryptoUtils.java @@ -0,0 +1,256 @@ +/*- + * ============LICENSE_START======================================================= + * PolicyEngineUtils + * ================================================================================ + * Copyright (C) 2018 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.policy.utils; + +import java.nio.charset.StandardCharsets; +import java.security.AlgorithmParameters; +import java.security.InvalidAlgorithmParameterException; +import java.security.InvalidKeyException; +import java.security.NoSuchAlgorithmException; +import java.security.Key; +import java.util.Base64; + +import javax.crypto.BadPaddingException; +import javax.crypto.Cipher; +import javax.crypto.IllegalBlockSizeException; +import javax.crypto.NoSuchPaddingException; +import javax.crypto.spec.SecretKeySpec; +import javax.xml.bind.DatatypeConverter; + +import org.onap.policy.common.logging.flexlogger.FlexLogger; +import org.onap.policy.common.logging.flexlogger.Logger; + +public class CryptoUtils { + private static final Logger LOGGER = FlexLogger.getLogger(CryptoUtils.class); + private static final String CIPHER_TYPE = "AES/CBC/PKCS5Padding"; + private static Key mKey = null; + private static AlgorithmParameters mAlgParm = null; + + static { + //the hadcoded key is to be removed in a future iteration + try { + String kval = "bmpybWJrbGN4dG9wbGF3Zg=="; + String algp = "BBBpbml0VmVjVGhpc0lzVGhl"; + + byte[] kvalb = DatatypeConverter.parseBase64Binary(kval); + byte[] algb = DatatypeConverter.parseBase64Binary(algp); + + mKey = new SecretKeySpec(kvalb, "AES"); + + mAlgParm = AlgorithmParameters.getInstance("AES"); + mAlgParm.init(algb, "ASN.1"); + + } catch (Exception ex) { + throw new ExceptionInInitializerError(ex); + } + } + + private CryptoUtils() { + // Private Constructor + } + + /** + * Decrypt txt. + * + * @param encryptedTxt + * text to be decrypted, Base 64 UrlEncoded + * @return the byte[] + * @throws NoSuchAlgorithmException + * the no such algorithm exception + * @throws NoSuchPaddingException + * the no such padding exception + * @throws InvalidAlgorithmParameterException + * the invalid algorithm parameter exception + * @throws InvalidKeyException + * the invalid key exception + * @throws IllegalBlockSizeException + * the illegal block size exception + * @throws BadPaddingException + * the bad padding exception + */ + public static byte[] decryptTxt(String encryptedTxt) + throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidAlgorithmParameterException, + InvalidKeyException, IllegalBlockSizeException, BadPaddingException { + Cipher cipher = Cipher.getInstance(CIPHER_TYPE); + cipher.init(Cipher.DECRYPT_MODE, mKey, mAlgParm); + + return cipher.doFinal(Base64.getUrlDecoder().decode(encryptedTxt.getBytes(StandardCharsets.UTF_8))); + } + + /** + * Decrypt txt. + * + * @param encryptedTxt + * text to be decrypted, Base 64 UrlEncoded + * @param mKey + * the key as Base 64 + * @return the byte[] + * @throws NoSuchAlgorithmException + * the no such algorithm exception + * @throws NoSuchPaddingException + * the no such padding exception + * @throws InvalidAlgorithmParameterException + * the invalid algorithm parameter exception + * @throws InvalidKeyException + * the invalid key exception + * @throws IllegalBlockSizeException + * the illegal block size exception + * @throws BadPaddingException + * the bad padding exception + */ + public static byte[] decryptTxt(String encryptedTxt, String base64BinaryKey) + throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidAlgorithmParameterException, + InvalidKeyException, IllegalBlockSizeException, BadPaddingException { + + byte[] keyValueByte = DatatypeConverter.parseBase64Binary(base64BinaryKey); + Key paramKey = new SecretKeySpec(keyValueByte, "AES"); + Cipher cipher = Cipher.getInstance(CIPHER_TYPE); + cipher.init(Cipher.DECRYPT_MODE, paramKey, mAlgParm); + + return cipher.doFinal(Base64.getUrlDecoder().decode(encryptedTxt.getBytes(StandardCharsets.UTF_8))); + } + + /** + * Decrypt txt, no exceptions thrown. + * + * @param encryptedTxt + * text to be decrypted, Base 64 UrlEncoded + * @return the decrypted text, or the original text if it could not be + * decrypted + */ + public static byte[] decryptTxtNoEx(String encryptedTxt) { + + try { + if (encryptedTxt == null || encryptedTxt.isEmpty()) { + LOGGER.error("decryptTxtNoEx: Input param encryptedTxt is not valid"); + return new byte[0]; + } + return decryptTxt(encryptedTxt); + } catch (Exception e) { + try { + LOGGER.error("decryptTxtNoEx: Exception while decryption : " + e); + return (encryptedTxt != null) ? encryptedTxt.getBytes(StandardCharsets.UTF_8) : new byte[0]; + } catch (Exception e1) { + LOGGER.error("decryptTxtNoEx: Exception on sending default : " + e1); + return new byte[0]; + } + } + } + + /** + * Decrypt txt, no exceptions thrown. + * + * @param encryptedTxt + * text to be decrypted, Base 64 UrlEncoded + * @return the decrypted text, or the original text if it could not be + * decrypted + */ + public static String decryptTxtNoExStr(String encryptedTxt) { + return new String(decryptTxtNoEx(encryptedTxt), StandardCharsets.UTF_8); + } + + /** + * Encrypt txt. + * + * @param plainTxt + * the plain txt + * @return the encrypted string + * @throws NoSuchPaddingException + * the no such padding exception + * @throws InvalidAlgorithmParameterException + * the invalid algorithm parameter exception + * @throws NoSuchAlgorithmException + * the no such algorithm exception + * @throws InvalidKeyException + * the invalid key exception + * @throws IllegalBlockSizeException + * the illegal block size exception + * @throws BadPaddingException + * the bad padding exception + */ + public static String encryptTxt(byte[] plainTxt) + throws NoSuchPaddingException, InvalidAlgorithmParameterException, + NoSuchAlgorithmException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException { + + Cipher cipher = Cipher.getInstance(CIPHER_TYPE); + cipher.init(Cipher.ENCRYPT_MODE, mKey, mAlgParm); + + byte[] encryption = cipher.doFinal(plainTxt); + return new String(Base64.getUrlEncoder().encode(encryption), StandardCharsets.UTF_8); + } + + /** + * Encrypt txt. + * + * @param plainTxt + * the plain txt to be encrypted + * @param base64BinaryKey + * the key as lexical representation of Base64 Binary + * @return the encrypted string + * @throws NoSuchPaddingException + * the no such padding exception + * @throws InvalidAlgorithmParameterException + * the invalid algorithm parameter exception + * @throws NoSuchAlgorithmException + * the no such algorithm exception + * @throws InvalidKeyException + * the invalid key exception + * @throws IllegalBlockSizeException + * the illegal block size exception + * @throws BadPaddingException + * the bad padding exception + */ + public static String encryptTxt(byte[] plainTxt, String base64BinaryKey) + throws NoSuchPaddingException, InvalidAlgorithmParameterException, + NoSuchAlgorithmException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException { + + byte[] keyValueByte = DatatypeConverter.parseBase64Binary(base64BinaryKey); + Key paramKey = new SecretKeySpec(keyValueByte, "AES"); + Cipher cipher = Cipher.getInstance(CIPHER_TYPE); + cipher.init(Cipher.ENCRYPT_MODE, paramKey, mAlgParm); + + byte[] encryption = cipher.doFinal(plainTxt); + return new String(Base64.getMimeEncoder().encode(encryption), StandardCharsets.UTF_8); + } + + /** + * Encrypt txt, no exceptions thrown + * + * @param plainTxt + * the plain txt to be encrypted + * @return the encrypted String , or the original text if it could not be + * encrypted + */ + public static String encryptTxtNoEx(byte[] plainTxt) { + + if (plainTxt == null || plainTxt.length == 0) { + LOGGER.error("encryptTxtNoEx: Input param plainTxt is not valid"); + return ""; + } + + try { + return encryptTxt(plainTxt); + } catch (Exception e) { + LOGGER.error("encryptTxtNoEx: Exception while decryption : " + e); + return new String(plainTxt, StandardCharsets.UTF_8); + } + } + +}
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