package com.lxzn.framework.utils;
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import com.lxzn.framework.exception.ExceptionCast;
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import com.lxzn.framework.model.response.CommonCode;
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import com.sun.mail.util.ASCIIUtility;
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import lombok.extern.slf4j.Slf4j;
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import javax.crypto.Cipher;
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import javax.crypto.CipherInputStream;
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import javax.crypto.CipherOutputStream;
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import javax.crypto.SecretKeyFactory;
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import javax.crypto.spec.DESKeySpec;
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import javax.crypto.spec.IvParameterSpec;
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import java.io.*;
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import java.security.Key;
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import java.util.Base64;
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@Slf4j
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public class DESUtil {
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private static String[] UpStrings = { "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z" };
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private static String[] DoStrings = { "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z" };
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private static String[] ArbStrings = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9" };
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public static final String key = DoStrings[11] + DoStrings[23] + DoStrings[25] + DoStrings[13] + ArbStrings[1] + ArbStrings[6] + ArbStrings[8] + ArbStrings[8];
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public static final String iv = UpStrings[11] + UpStrings[23] + UpStrings[25] + UpStrings[13] + ArbStrings[1] + ArbStrings[6] + ArbStrings[8] + ArbStrings[8];
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/**
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* 偏移变量，固定占8位字节
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*/
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private final static String IV_PARAMETER = iv;
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/**
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* 密钥算法
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*/
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private static final String ALGORITHM = "DES";
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/**
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* 加密/解密算法-工作模式-填充模式
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*/
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private static final String CIPHER_ALGORITHM = "DES/CBC/PKCS5Padding";
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/**
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* 默认编码
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*/
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private static final String CHARSET = "utf-8";
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/**
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* 生成key
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*
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* @param password
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* @return
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* @throws Exception
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*/
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private static Key generateKey(String password) throws Exception {
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DESKeySpec dks = new DESKeySpec(ASCIIUtility.getBytes(password)); //password.getBytes()
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SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(ALGORITHM);
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return keyFactory.generateSecret(dks);
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}
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/**
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* DES加密字符串
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*
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* @param password 加密密码，长度不能够小于8位
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* @param data 待加密字符串
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* @return 加密后内容
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*/
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public static String encrypt(String password, String data) {
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if (password== null || password.length() < 8) {
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throw new RuntimeException("加密失败，key不能小于8位");
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}
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if (data == null)
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return null;
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try {
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Key secretKey = generateKey(password);
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Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
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IvParameterSpec iv = new IvParameterSpec(IV_PARAMETER.getBytes(CHARSET));
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cipher.init(Cipher.ENCRYPT_MODE, secretKey, iv);
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byte[] bytes = cipher.doFinal(data.getBytes(CHARSET));
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return new String(Base64.getEncoder().encode(bytes));
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} catch (Exception e) {
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e.printStackTrace();
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return data;
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}
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}
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/**
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* DES解密字符串
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*
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* @param password 解密密码，长度不能够小于8位
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* @param data 待解密字符串
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* @return 解密后内容
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*/
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public static String decrypt(String password, String data) {
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if (password== null || password.length() < 8) {
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//ExceptionCast.cast(CommonCode.LICENSE_ERROR);
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return null;
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}
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if (data == null)
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return null;
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try {
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Key secretKey = generateKey(password);
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Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
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IvParameterSpec iv = new IvParameterSpec(IV_PARAMETER.getBytes(CHARSET));
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cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);
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byte[] bytes = cipher.doFinal(Base64.getDecoder().decode(data.getBytes(CHARSET)));
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return new String(bytes, CHARSET);
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} catch (Exception e) {
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log.error("解密序列号错误，{}", e);
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//ExceptionCast.cast(CommonCode.LICENSE_ERROR);
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return null;
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}
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}
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/**
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* DES加密文件
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*
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* @param srcFile 待加密的文件
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* @param destFile 加密后存放的文件路径
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* @return 加密后的文件路径
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*/
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public static String encryptFile(String password, String srcFile, String destFile) {
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if (password== null || password.length() < 8) {
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throw new RuntimeException("加密失败，key不能小于8位");
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}
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try {
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IvParameterSpec iv = new IvParameterSpec(IV_PARAMETER.getBytes(CHARSET));
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Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
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cipher.init(Cipher.ENCRYPT_MODE, generateKey(password), iv);
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InputStream is = new FileInputStream(srcFile);
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OutputStream out = new FileOutputStream(destFile);
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CipherInputStream cis = new CipherInputStream(is, cipher);
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byte[] buffer = new byte[1024];
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int r;
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while ((r = cis.read(buffer)) > 0) {
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out.write(buffer, 0, r);
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}
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cis.close();
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is.close();
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out.close();
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return destFile;
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} catch (Exception ex) {
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ex.printStackTrace();
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}
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return null;
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}
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/**
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* DES解密文件
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*
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* @param srcFile 已加密的文件
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* @param destFile 解密后存放的文件路径
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* @return 解密后的文件路径
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*/
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public static String decryptFile(String password, String srcFile, String destFile) {
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if (password== null || password.length() < 8) {
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throw new RuntimeException("加密失败，key不能小于8位");
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}
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try {
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File file = new File(destFile);
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if (!file.exists()) {
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file.getParentFile().mkdirs();
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file.createNewFile();
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}
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IvParameterSpec iv = new IvParameterSpec(IV_PARAMETER.getBytes(CHARSET));
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Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
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cipher.init(Cipher.DECRYPT_MODE, generateKey(password), iv);
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InputStream is = new FileInputStream(srcFile);
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OutputStream out = new FileOutputStream(destFile);
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CipherOutputStream cos = new CipherOutputStream(out, cipher);
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byte[] buffer = new byte[1024];
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int r;
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while ((r = is.read(buffer)) >= 0) {
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cos.write(buffer, 0, r);
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}
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cos.close();
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is.close();
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out.close();
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return destFile;
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} catch (Exception ex) {
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ex.printStackTrace();
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}
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return null;
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}
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public static void main(String[] args) {
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String password = key;
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String data = "NBFEBFBFF000806C1D=32M=45R=2022-09-28ENDn";
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String s1 = encrypt(password, data);
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System.out.println(s1);
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String s2 = decrypt(password, s1);
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System.out.println(s2);
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}
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}
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