com.wavemaker.commons.crypto.CryptoUtils Maven / Gradle / Ivy
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* Copyright (C) 2022-2023 WaveMaker, Inc.
*
* 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,
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package com.wavemaker.commons.crypto;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.spec.AlgorithmParameterSpec;
import java.util.Base64;
import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.GCMParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import com.wavemaker.commons.WMRuntimeException;
public class CryptoUtils {
private static final SecureRandom SECURE_RANDOM = new SecureRandom();
private static final String ENCRYPTION_ALG = "AES/GCM/NoPadding";
private static final String SECRET_KEY_SPEC_ALGORITHM = "AES";
private static final int GCM_IV_LENGTH = 12;
private CryptoUtils() {
}
public static String encrypt(String key, String plaintext) {
SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), SECRET_KEY_SPEC_ALGORITHM);
byte[] iv = new byte[GCM_IV_LENGTH];
SECURE_RANDOM.nextBytes(iv);
GCMParameterSpec parameterSpec = new GCMParameterSpec(128, iv);
try {
Cipher cipher = Cipher.getInstance(ENCRYPTION_ALG);
cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec, parameterSpec);
byte[] cipherText = cipher.doFinal(plaintext.getBytes(StandardCharsets.UTF_8));
ByteBuffer byteBuffer = ByteBuffer.allocate(iv.length + cipherText.length);
byteBuffer.put(iv);
byteBuffer.put(cipherText);
return Base64.getEncoder().encodeToString(byteBuffer.array());
} catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException | InvalidAlgorithmParameterException |
IllegalBlockSizeException | BadPaddingException e) {
throw new WMRuntimeException(e);
}
}
public static String decrypt(String key, String encryptedText) {
SecretKeySpec secretKeySpec = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), SECRET_KEY_SPEC_ALGORITHM);
byte[] cipherMessage = Base64.getDecoder().decode(encryptedText);
AlgorithmParameterSpec gcmParameterSpec = new GCMParameterSpec(128, cipherMessage, 0, GCM_IV_LENGTH);
try {
final Cipher cipher = Cipher.getInstance(ENCRYPTION_ALG);
cipher.init(Cipher.DECRYPT_MODE, secretKeySpec, gcmParameterSpec);
byte[] plainText = cipher.doFinal(cipherMessage, GCM_IV_LENGTH, cipherMessage.length - GCM_IV_LENGTH);
return new String(plainText, StandardCharsets.UTF_8);
} catch (NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException | InvalidAlgorithmParameterException |
IllegalBlockSizeException | BadPaddingException e) {
throw new WMRuntimeException(e);
}
}
}