[转]cryptoJs DES_CBC_Pkcs7 转成 Java(对称加密早期算法"DES"现已不安全,仅用于老项目,新项目应使用AES)

原文地址:cryptoJs DES_CBC_Pkcs7 转成 Java - 唯学而知 - 博客园

前端 DES 加密：

import cryptoJs from 'crypto-js';

// DES 加密
function encrypt(message, key, iv) {
  // 字符串转 16进制
  const keyHex = cryptoJs.enc.Utf8.parse(key);
  const ivHex = cryptoJs.enc.Utf8.parse(iv);
  const option = {
    iv: ivHex,
    mode: cryptoJs.mode.CBC,
    padding: cryptoJs.pad.Pkcs7,
  };
  // 加密
  const encrypted = cryptoJs.DES.encrypt(message, keyHex, option);

  console.log(
    '------------encrypted------------',
    '\nmessage: ' + message,
    '\nkey: ' + key,
    '\niv: ' + iv,
    '\nkeyHex: ' + keyHex,
    '\nivHex: ' + ivHex,
    '\nencrypted: ' + encrypted,  // 将 encrypted 转成 BASE64 字符串
    '\nencrypted.ciphertext: ' + encrypted.ciphertext.toString() // 将 encrypted 转成十六进制字符串
  );

  return encrypted.ciphertext.toString();
}

// 调用加密方法
let encrypted = encrypt('{"name":"xiaoming","id":"112233","sex":"0"}', '12345678', '12345678');

打印结果：

------------encrypted------------ message: {"name":"xiaoming","id":"112233","sex":"0"} key: 12345678 iv: 12345678 keyHex: 3132333435363738 ivHex: 3132333435363738 encrypted: nkzh3knwg2TwyS2Tmslfbk6a10DRqO/Sc2IMJ6abKXAsdkrR1z8X7LFJnCRbtV+s encrypted.ciphertext: 9e4ce1de49f08364f0c92d939ac95f6e4e9ad740d1a8efd273620c27a69b29702c764ad1d73f17ecb1499c245bb55fac

对应的 Java 代码为：

/**
 * 算法类型
 */
private final static String ALGORITHM_DES = "DES";

/**
 * 加密算法/加密模式/填充类型
 */
private static final String CIPHER_DES_MODE_CBC_PKCS5PADDING = "DES/CBC/PKCS5Padding";

/**
 * 字符编码
 */
public static final String CHARSET_NAME = "UTF-8";

/**
 * 字节数组转成16进制字符串
 *
 * @param bytes
 * @return
 */
public static String byte2hex(byte[] bytes) {
    StringBuffer sb = new StringBuffer(bytes.length * 2);
    String tmp = "";
    for (int n = 0; n < bytes.length; n++) {
        // 整数转成十六进制表示
        tmp = (Integer.toHexString(bytes[n] & 0XFF));
        if (tmp.length() == 1) {
            sb.append("0");
        }
        sb.append(tmp);
    }
    return sb.toString().toUpperCase();
}

/**
 * DES 加密
 *
 * @param data
 * @param key
 * @param iv
 * @return
 * @throws Exception
 */
public static String encryptCbcPkcs5padding(String data, String key, String iv) throws Exception {
    Cipher cipher = Cipher.getInstance(CIPHER_DES_MODE_CBC_PKCS5PADDING);
    SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), ALGORITHM_DES);
    IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());
    cipher.init(Cipher.ENCRYPT_MODE, keyspec, ivspec);
    byte[] result = cipher.doFinal(data.getBytes(CHARSET_NAME));
//        String encrypted = new sun.misc.BASE64Encoder().encode(result);
//        System.out.println("encrypted: " + encrypted);
    String ciphertext = byte2hex(result);
    return ciphertext.toLowerCase();
}

前端 DES 解密：

function decrypt(ciphertext, key, iv) {
  const keyHex = cryptoJs.enc.Utf8.parse(key);
  const ivHex = cryptoJs.enc.Utf8.parse(iv);
  // 解密
  const decrypted = cryptoJs.DES.decrypt(
    {
      ciphertext: cryptoJs.enc.Hex.parse(ciphertext),
    },
    keyHex,
    {
      iv: ivHex,
      mode: cryptoJs.mode.CBC,
      padding: cryptoJs.pad.Pkcs7,
    },
  );

  console.log(
    '------------decrypted------------',
    '\nciphertext: ' + ciphertext,
    '\nkey: ' + key,
    '\niv: ' + iv,
    '\nkeyHex: ' + keyHex,
    '\nivHex: ' + ivHex,
    '\ndecrypted.toString(cryptoJs.enc.Utf8): ' + decrypted.toString(cryptoJs.enc.Utf8)
  );

  return decrypted.toString(cryptoJs.enc.Utf8);
}

打印结果：

------------decrypted------------ ciphertext: 9e4ce1de49f08364f0c92d939ac95f6e4e9ad740d1a8efd273620c27a69b29702c764ad1d73f17ecb1499c245bb55fac key: 12345678 iv: 12345678 keyHex: 3132333435363738 ivHex: 3132333435363738 decrypted.toString(cryptoJs.enc.Utf8): {"name":"xiaoming","id":"112233","sex":"0"}

对应的 Java 代码为：

/**
 * DES 解密
 *
 * @param dataEncode
 * @param key
 * @param iv
 * @return
 * @throws Exception
 */
public static String decryptCbcPkcs5padding(String dataEncode, String key, String iv) throws Exception {
    byte[] encrypted = Convert.hexToBytes(dataEncode);
    Cipher cipher = Cipher.getInstance(CIPHER_DES_MODE_CBC_PKCS5PADDING);
    SecretKeySpec keyspec = new SecretKeySpec(key.getBytes(), ALGORITHM_DES);
    IvParameterSpec ivspec = new IvParameterSpec(iv.getBytes());
    cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);
    return new String(cipher.doFinal(encrypted));
}