/* * Copyright (c) 2018-2028, DreamLu All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * Neither the name of the dreamlu.net developer nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * Author: DreamLu 卢春梦 (596392912@qq.com) */ package org.springblade.core.tool.utils; import org.springframework.lang.Nullable; import javax.crypto.Cipher; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.DESKeySpec; import java.util.Objects; /** * DES加解密处理工具 * * @author L.cm */ public class DesUtil { /** * 数字签名,密钥算法 */ public static final String DES_ALGORITHM = "DES"; /** * 生成 des 密钥 * * @return 密钥 */ public static String genDesKey() { return StringUtil.random(16); } /** * DES加密 * * @param data byte array * @param password 密钥 * @return des hex */ public static String encryptToHex(byte[] data, String password) { return HexUtil.encodeToString(encrypt(data, password)); } /** * DES加密 * * @param data 字符串内容 * @param password 密钥 * @return des hex */ @Nullable public static String encryptToHex(@Nullable String data, String password) { if (StringUtil.isBlank(data)) { return null; } byte[] dataBytes = data.getBytes(Charsets.UTF_8); return encryptToHex(dataBytes, password); } /** * DES解密 * * @param data 字符串内容 * @param password 密钥 * @return des context */ @Nullable public static String decryptFormHex(@Nullable String data, String password) { if (StringUtil.isBlank(data)) { return null; } byte[] hexBytes = HexUtil.decode(data); return new String(decrypt(hexBytes, password), Charsets.UTF_8); } /** * DES加密 * * @param data byte array * @param password 密钥 * @return des hex */ public static String encryptToBase64(byte[] data, String password) { return Base64Util.encodeToString(encrypt(data, password)); } /** * DES加密 * * @param data 字符串内容 * @param password 密钥 * @return des hex */ @Nullable public static String encryptToBase64(@Nullable String data, String password) { if (StringUtil.isBlank(data)) { return null; } byte[] dataBytes = data.getBytes(Charsets.UTF_8); return encryptToBase64(dataBytes, password); } /** * DES解密 * * @param data 字符串内容 * @param password 密钥 * @return des context */ public static byte[] decryptFormBase64(byte[] data, String password) { byte[] dataBytes = Base64Util.decode(data); return decrypt(dataBytes, password); } /** * DES解密 * * @param data 字符串内容 * @param password 密钥 * @return des context */ @Nullable public static String decryptFormBase64(@Nullable String data, String password) { if (StringUtil.isBlank(data)) { return null; } byte[] dataBytes = Base64Util.decodeFromString(data); return new String(decrypt(dataBytes, password), Charsets.UTF_8); } /** * DES加密 * * @param data 内容 * @param desKey 密钥 * @return byte array */ public static byte[] encrypt(byte[] data, byte[] desKey) { return des(data, desKey, Cipher.ENCRYPT_MODE); } /** * DES加密 * * @param data 内容 * @param desKey 密钥 * @return byte array */ public static byte[] encrypt(byte[] data, String desKey) { return encrypt(data, Objects.requireNonNull(desKey).getBytes(Charsets.UTF_8)); } /** * DES解密 * * @param data 内容 * @param desKey 密钥 * @return byte array */ public static byte[] decrypt(byte[] data, byte[] desKey) { return des(data, desKey, Cipher.DECRYPT_MODE); } /** * DES解密 * * @param data 内容 * @param desKey 密钥 * @return byte array */ public static byte[] decrypt(byte[] data, String desKey) { return decrypt(data, Objects.requireNonNull(desKey).getBytes(Charsets.UTF_8)); } /** * DES加密/解密公共方法 * * @param data byte数组 * @param desKey 密钥 * @param mode 加密:{@link Cipher#ENCRYPT_MODE},解密:{@link Cipher#DECRYPT_MODE} * @return des */ private static byte[] des(byte[] data, byte[] desKey, int mode) { try { SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(DES_ALGORITHM); Cipher cipher = Cipher.getInstance(DES_ALGORITHM); DESKeySpec desKeySpec = new DESKeySpec(desKey); cipher.init(mode, keyFactory.generateSecret(desKeySpec), Holder.SECURE_RANDOM); return cipher.doFinal(data); } catch (Exception e) { throw Exceptions.unchecked(e); } } }