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