引入 cryptojs 包

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<script src="https://cdn.bootcss.com/crypto-js/3.1.9-1/crypto-js.min.js"></script>

DES 加密和解密

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//DES加密
function encryptByDES(message, key) {
  var keyHex = CryptoJS.enc.Utf8.parse(key);
  var encrypted = CryptoJS.DES.encrypt(message, keyHex, {
    mode: CryptoJS.mode.ECB,
    padding: CryptoJS.pad.Pkcs7
  });
  return encrypted.ciphertext.toString();
}

//DES解密
function decryptByDES(ciphertext, key) {
  var keyHex = CryptoJS.enc.Utf8.parse(key);
  var decrypted = CryptoJS.DES.decrypt({
    ciphertext: CryptoJS.enc.Hex.parse(ciphertext)
  }, keyHex, {
    mode: CryptoJS.mode.ECB,
    padding: CryptoJS.pad.Pkcs7
  });
  var result_value = decrypted.toString(CryptoJS.enc.Utf8);
  return result_value;
}

DES + Base64 加密和解密

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// DES 加密 + Base64 编码
function encryptByDES(message, key) {
  // For the key, when you pass a string,
  // it's treated as a passphrase and used to derive an actual key and IV.
  // Or you can pass a WordArray that represents the actual key.
  // If you pass the actual key, you must also pass the actual IV.
  var keyHex = CryptoJS.enc.Utf8.parse(key);
  // console.log(CryptoJS.enc.Utf8.stringify(keyHex), CryptoJS.enc.Hex.stringify(keyHex));
  // console.log(CryptoJS.enc.Hex.parse(CryptoJS.enc.Utf8.parse(key).toString(CryptoJS.enc.Hex)));
  // CryptoJS use CBC as the default mode, and Pkcs7 as the default padding scheme
  var encrypted = CryptoJS.DES.encrypt(message, keyHex, {
    mode: CryptoJS.mode.ECB,
    padding: CryptoJS.pad.Pkcs7
  });
  // decrypt encrypt result
  // var decrypted = CryptoJS.DES.decrypt(encrypted, keyHex, {
  //     mode: CryptoJS.mode.ECB,
  //     padding: CryptoJS.pad.Pkcs7
  // });
  // console.log(decrypted.toString(CryptoJS.enc.Utf8));
  // when mode is CryptoJS.mode.CBC (default mode), you must set iv param
  // var iv = 'inputvec';
  // var ivHex = CryptoJS.enc.Hex.parse(CryptoJS.enc.Utf8.parse(iv).toString(CryptoJS.enc.Hex));
  // var encrypted = CryptoJS.DES.encrypt(message, keyHex, { iv: ivHex, mode: CryptoJS.mode.CBC });
  // var decrypted = CryptoJS.DES.decrypt(encrypted, keyHex, { iv: ivHex, mode: CryptoJS.mode.CBC });
  // console.log('encrypted.toString()  -> base64(ciphertext)  :', encrypted.toString());
  // console.log('base64(ciphertext)    <- encrypted.toString():', encrypted.ciphertext.toString(CryptoJS.enc.Base64));
  // console.log('ciphertext.toString() -> ciphertext hex      :', encrypted.ciphertext.toString());
  // return encrypted.toString();
  return encrypted.ciphertext.toString(CryptoJS.enc.Base64);
}

//Base64 解码 + DES 解密
function decryptByDES(ciphertext, key) {
  var keyHex = CryptoJS.enc.Utf8.parse(key);
  // direct decrypt ciphertext
  var decrypted = CryptoJS.DES.decrypt({
    ciphertext: CryptoJS.enc.Base64.parse(ciphertext)
  }, keyHex, {
    mode: CryptoJS.mode.ECB,
    padding: CryptoJS.pad.Pkcs7
  });
  return decrypted.toString(CryptoJS.enc.Utf8);
}

使用

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var message = '111111';//需要加密的数据
var key = '12345678';//加密key
//加密
desMessage = encryptByDES(message, key);
console.log(desMessage);
//解密
message = decryptByDES(desMessage,key)
console.log(message);