在 JavaScript 中重现 C# 中的 AES 解密方法

Question

我正在尝试在JavaScript中重现以下C#解密方法。

此方法用于解密短字符串：姓名、地址、电子邮件地址等。

感觉非常接近，因为我能够"成功"解密的字符串似乎部分解密。

例如，一些电子邮件如下所示：x"R�Îd¹1gtWÈ2)[e-mail]

竖琴

public static readonly byte[] INIT_VECTOR = { 0x00, 0x00, ... };
public static string Decrypt(string cipherText) {
string EncryptionKey = "Some Encryption Key";
byte[] cipherBytes = Convert.FromBase64String(cipherText);
using (Aes encryptor = Aes.Create())
{
​
Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(EncryptionKey, INIT_VECTOR);
encryptor.Key = pdb.GetBytes(32);
encryptor.IV = pdb.GetBytes(16);
using (MemoryStream ms = new MemoryStream())
{
using (CryptoStream cs = new CryptoStream(ms, encryptor.CreateDecryptor(), CryptoStreamMode.Write))
{
cs.Write(cipherBytes, 0, cipherBytes.Length);
cs.Close();
}
cipherText = Encoding.Unicode.GetString(ms.ToArray());
}
}
return cipherText;
}

JavaScript

import atob from 'atob';
import forge from 'node-forge';
const InitVector = [0x00, ...];
const EncryptionKey = 'Some Encryption Key';
const iv = Buffer.from(InitVector).toString();
const convertBase64StringToUint8Array = input => {
const data = atob(input);
const array = Uint8Array.from(data, b => b.charCodeAt(0));
return array;
};
const decrypt = cipher => {
const cipherArray = convertBase64StringToUint8Array(cipher);
const key = forge.pkcs5.pbkdf2(EncryptionKey, iv, 1000, 32);
const decipher = forge.cipher.createDecipher('AES-CBC', key);
decipher.start({ iv });
decipher.update(forge.util.createBuffer(cipherArray, 'raw'));
const result = decipher.finish();
if (result) {
return decipher.output.data;
} else {
return false;
}
};

Answer 1

多亏了凯拉拉卡，我设法弄清楚了这一点！

这是我最终得到的代码。

import atob from 'atob';
import forge from 'node-forge';
const InitVector = [0x00, ...];
const EncryptionKey = 'Some Encryption Key';
const initKey = Buffer.from(InitVector).toString(); // Changed this to `initKey`
const convertBase64StringToUint8Array = input => {
const data = atob(input);
const array = Uint8Array.from(data, b => b.charCodeAt(0));
return array;
};
const decrypt = cipher => {
const cipherArray = convertBase64StringToUint8Array(cipher);
const key = forge.pkcs5.pbkdf2(EncryptionKey, iv, 1000, 32);
/**
* Added the following
* Note the key size = 48
*  This was due to the fact that the C# dictated that
*  the IV was 16 bytes, starting at the end of the key.
*/
const keyAndIV = forge.pkcs5.pbkdf2(encryptionKey, initKey, 1000, 32 + 16);
/**
* Therefore, we cut the iv from the new string
*/
const iv = keyAndIV.slice(32, 32 + 16); // 16 bytes
const decipher = forge.cipher.createDecipher(
'AES-CBC',
forge.util.createBuffer(key)
);
decipher.start({ iv });
decipher.update(forge.util.createBuffer(cipherArray, 'raw'));
const result = decipher.finish();
if (result) {
return decipher.output.data;
} else {
return false;
}
};