JS解密翻译为C#实现

Question

 
const CryptoJS = require("crypto-js");
var key = "aaad3e4fd540b0f79dca95606e72bf93"
 
function decryptUrl(ciphertext) {
    return CryptoJS.AES.decrypt(
        { ciphertext: CryptoJS.enc.Base64url.parse(ciphertext) },
        CryptoJS.enc.Hex.parse(key),
        {
            mode: CryptoJS.mode.ECB,
            padding: CryptoJS.pad.Pkcs7,
        }
    ).toString(CryptoJS.enc.Utf8);
}
 

需求：用c#实现相同的功能，且可验证。比如JS模式输入12345加密解密的结果需要和C#模式解密解密相同。
注：不要想当然，结果需要验证。
例子：原始加密的（Base64url编码的）"pX7rCko1ZPLJXbyU3qjcDqAp042BK5yCrhhNlUZEBd6lHKILemhbvHD1YkhQ7FDbGUfUytfG-6jt2o3iLR22jDOx3DLin7SVEB28NZztktcfDPlXConw0vHlRaHB0sYKei8EOS6WUWLS4uNDQx_c8JIAg_EHsgVKZmjkPCqp3dXbDkuLWAGR_BoUNJXdM-0suaeG529bY5WSqIXsvJbQmTU1cmkNzajf9tWRB101_7kJ8oJMqOEbS-WXOAE5GwNN7Z8__mltgZO8flVslIAD7LyhL4iKniKu34kt2-35P99xW97GGT-jlIqAJPtXdM2A"

解密后？

Answer 1

可以使用 C# 自带的 System.Security.Cryptography 命名空间中的类，例如 Aes 类和 RijndaelManaged类。代码如下

using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;

string key = "aaad3e4fd540b0f79dca95606e72bf93";
byte[] keyBytes = Encoding.ASCII.GetBytes(key);

string decryptUrl(string ciphertext)
{
    byte[] cipherTextBytes = Convert.FromBase64String(ciphertext);
    using (Aes encryptor = Aes.Create())
    {
        Rfc2898DeriveBytes pdb = new Rfc2898DeriveBytes(key, new byte[] { 0x49, 0x76, 0x61, 0x6e, 0x20, 0x4d, 0x65, 0x64, 0x76, 0x65, 0x64, 0x65, 0x76 });
        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(cipherTextBytes, 0, cipherTextBytes.Length);
                cs.Close();
            }
            ciphertext = Encoding.Unicode.GetString(ms.ToArray());
        }
    }
    return ciphertext;
}