如何使用AES解密CryptoJS？ [英] How to decrypt with CryptoJS using AES?

问题描述

问题表明，我似乎无法使用所需的选项（AES，ECB Mode& PKCS7）正确获取解密值。

m加密如下：

  var ENC_KEY =bXlrZXk =; //mykey
 
 var encrypted = CryptoJS.AES.encrypt（hello，CryptoJS.enc.Base64.parse（ENC_KEY），
 {
 mode：CryptoJS。 mode.ECB，
 padding：CryptoJS.pad.Pkcs7 
}）; 
 console.log（'encrypted：'+ encrypted）; 
  

它可以按预期工作，并输出我预期的加密值，但是当我使用下面的解密方法最后输出一个空对象：

  var decryptpted = CryptoJS.AES.decrypt（encrypted，CryptoJS.enc.Base64。解析（ENC_KEY），
 {
模式：CryptoJS.mode.ECB，
 padding：CryptoJS.pad.Pkcs7 
}）; 
 console.log（'decryptpted：'+ decryptpted）; 
  

我也试过使用：

  console.log（'encrypted解密为：'+ decryptpted.toString（CryptoJS.enc.Utf8）; 
  

但没有喜悦...

解决方案

我在一个小提琴有一点让它工作）：

  // decrypt给出一个十六进制
函数hex2a（hexx）{
 var hex = hexx.toString（）; //强制转换
 var str =''; 
 for（var i = 0; i< hex.length; i + = 2）
 str + = String.fromCharCode（parseInt（hex.substr（i，2），16））; 
 return str; 
} 
 
 var key = CryptoJS。 encBase64.parse（Secret Passphrase）; 
 
 alert（key）; 
 
 var encrypted = CryptoJS.AES.encrypt（hello，key，
 {
 mode：CryptoJS.mode.ECB 
}）; 
 
 alert（'encrypted：'+ encrypted）; 
 
 var decryptpted = CryptoJS.AES.decrypt（encrypted，key，
 {
 mo de：CryptoJS.mode.ECB 
}）; 
 
 alert（'decryptpted：'+ hex2a（decryptpted））; 
  

http://jsfiddle.net/gttL705r/

，发现解密返回一个十六进制，这可能不是一个字符串...可以这个引起你的问题？因此，使用快速的hex2ascii函数，'hello'返回：）

我还删除了指定的填充，因为Pkcs7被认为是文档中的默认值，我找不到src js我需要下载。

As the question suggests, I can't seem to get a decrypted value correctly using the required options (AES, ECB Mode & PKCS7).

I'm encrypting as below:

  var ENC_KEY = "bXlrZXk=";  //"mykey"

  var encrypted = CryptoJS.AES.encrypt("hello",  CryptoJS.enc.Base64.parse(ENC_KEY), 
    {
        mode: CryptoJS.mode.ECB,
        padding: CryptoJS.pad.Pkcs7
    });
  console.log('encrypted: ' + encrypted);

which works as expected and outputs the encrypted value I expect however when I decrypt this using the below, I end up with an empty object being output:

var decrypted = CryptoJS.AES.decrypt(encrypted, CryptoJS.enc.Base64.parse(ENC_KEY), 
    {
        mode: CryptoJS.mode.ECB,
        padding: CryptoJS.pad.Pkcs7
    });
    console.log('decrypted: ' + decrypted);

I have also tried using:

console.log('encrypted is decrypted to: ' + decrypted.toString(CryptoJS.enc.Utf8);

but no joy...

解决方案

I tried this in a fiddle(modded a bit to get it to work):

//decrypt gives a hex
function hex2a(hexx) {
    var hex = hexx.toString();//force conversion
    var str = '';
    for (var i = 0; i < hex.length; i += 2)
        str += String.fromCharCode(parseInt(hex.substr(i, 2), 16));
    return str;
}

var key = CryptoJS.enc.Base64.parse("Secret Passphrase"); 

alert(key);

var encrypted = CryptoJS.AES.encrypt("hello",  key, 
    {
        mode: CryptoJS.mode.ECB
    });

alert('encrypted: ' + encrypted);

var decrypted = CryptoJS.AES.decrypt(encrypted, key, 
    {
        mode: CryptoJS.mode.ECB
    });

alert('decrypted: ' + hex2a(decrypted));

http://jsfiddle.net/gttL705r/

and found that decrypt returned a hex, which may not have been a string... could this be causing your problems? So, with a quick hex2ascii function, 'hello' is return back :)

I also removed the padding specified, since Pkcs7 is said to be the default in the docs and I couldn't find src js i needed to download for it.

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