DES加密解密和JavaScript加密解密

Question

我正在加密以前用base64编码的东西。

这些步骤是：

1. 在base64中编码纯文本(可读)
2. 用DES/CBC/PKCS7PADDING对base64编码文本进行CryptoJS加密
3. 在base64中再次编码步骤2中获得的信息

这是我在Javascript中的代码：

function encryptDesCbcPkcs7Padding(message, key) {
    var keyHex = CryptoJS.enc.Utf8.parse(key);
    var iv = new Uint8Array(0);
    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, padding: CryptoJS.pad.Pkcs7 });


    return encrypted;//.toString(CryptoJS.enc.Utf8);
}

var plainText = "hola";
console.log("Plain text: ", plainText);
var base64Coded = window.btoa(plainText);
console.log("Base64 coded text: ", base64Coded);

var encrypted = encryptDesCbcPkcs7Padding(base64Coded, "12345678");
console.log("Encrypted: ", encrypted);
var finalEncrypted = CryptoJS.enc.Base64.stringify(encrypted.ciphertext);
console.log("Final encrypted: ", finalEncrypted);
alert("Final encrypted: " + finalEncrypted);

通过这段代码，我可以用前面的步骤对信息进行加密。

问题:我不能做相反的步骤。我做错了什么？

下面是我使用的反向代码：

function decryptDesCbcPkcs7Padding(message, key) {
    var keyHex = CryptoJS.enc.Utf8.parse(key);
    var iv = new Uint8Array(0);
    var ivHex = CryptoJS.enc.Hex.parse(CryptoJS.enc.Utf8.parse(iv).toString(CryptoJS.enc.Hex));

    var decrypted = CryptoJS.DES.decrypt(message, keyHex, { iv: ivHex, mode: CryptoJS.mode.CBC, padding: CryptoJS.pad.Pkcs7 });


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

var base64Decoded = CryptoJS.enc.Base64.parse(finalEncrypted).toString();
console.log("Base64 decoded", base64Decoded);

var decrypted = decryptDesCbcPkcs7Padding(base64Decoded, "12345678");
console.log("Decrypted: ", decrypted);

var finalDecrypted = CryptoJS.enc.Base64.stringify(encrypted.ciphertext);
console.log("Final encrypted: ", finalEncrypted);
alert("Final encrypted: " + finalEncrypted);

我不能让这个代码正常工作，我做错什么了？

Answer 1

除了复制粘贴错误之外，代码中的编码还有许多问题。这是固定密码。

​

function encryptDesCbcPkcs7Padding(message, key) {
    var keyWords = CryptoJS.enc.Utf8.parse(key);
    var ivWords = CryptoJS.lib.WordArray.create([0, 0]);
    var encrypted = CryptoJS.DES.encrypt(message, keyWords, { iv: ivWords});
  
    return encrypted;//.toString(CryptoJS.enc.Utf8);
}

var plainText = "hola";
console.log("Plain text: ", plainText);
var base64Coded = window.btoa(plainText);
console.log("Base64 coded text: ", base64Coded);

var encrypted = encryptDesCbcPkcs7Padding(base64Coded, "12345678");
console.log("Encrypted: ", encrypted);
var finalEncrypted = CryptoJS.enc.Base64.stringify(encrypted.ciphertext);
console.log("Final encrypted: ", finalEncrypted);
alert("Final encrypted: " + finalEncrypted);

function decryptDesCbcPkcs7Padding(message, key) {
    var keyWords = CryptoJS.enc.Utf8.parse(key);
    var ivWords = CryptoJS.lib.WordArray.create([0, 0]);

    var decrypted = CryptoJS.DES.decrypt({ciphertext: message}, keyWords, { iv: ivWords });

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

var base64Decoded = CryptoJS.enc.Base64.parse(finalEncrypted);
console.log("Base64 decoded", base64Decoded);

var decrypted = decryptDesCbcPkcs7Padding(base64Decoded, "12345678");
console.log("Decrypted: ", decrypted);

var finalDecrypted = CryptoJS.enc.Base64.parse(decrypted.toString(CryptoJS.enc.Utf8)).toString(CryptoJS.enc.Utf8);
console.log("Final decrypted: ", finalDecrypted);
alert("Final decrypted: " + finalDecrypted);

<script src="https://cdn.rawgit.com/CryptoStore/crypto-js/3.1.2/build/rollups/tripledes.js"></script>

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