如何在C＃中进行AES128解密？

问题描述

我有一个函数尝试在C＃中解字节数组。

解密功能：

string Decrypt(byte[] cipherText,byte[] Key,byte[] IV)
    {
        string plaintext = null;
        // Create AesManaged    
        using (AesManaged aes = new AesManaged())
        {
            aes.Mode = CipherMode.ECB;
            aes.Padding = PaddingMode.None;
            // Create a decryptor    
            ICryptoTransform decryptor = aes.CreateDecryptor(Key,IV);
            // Create the streams used for decryption.    
            using (MemoryStream ms = new MemoryStream(cipherText))
            {
                // Create crypto stream    
                using (CryptoStream cs = new CryptoStream(ms,decryptor,CryptoStreamMode.Read))
                {
                    // Read crypto stream    
                    using (StreamReader reader = new StreamReader(cs))
                        plaintext = reader.ReadToEnd();
                }
            }
        }
        return plaintext;
    }

下面是我如何实现该功能：

byte[] app_key = { 0x01,0x01,0x01 };
byte[] data    = { 0xB6,0x00,0x73,0x69,0x2D,0x18,0x4F,0x84,0xE8 };
var sts = Decrypt(data,app_key,new byte[16]);
Console.WriteLine(BitConverter.ToString(Encoding.ASCII.GetBytes(sts)));

但是输出是3F-3F-2F-31-3F-3F-3F-5E-61-2A-21-42-3F-2B这是错误的！
正确的输出是d4-f7-2f-31-a3-a8-d4-a3-5e-61-2a-21-42-88-2b-dc。

在线解密器链接：http://aes.online-domain-tools.com/run/?inputType=frm-text&text=B6-00-00-00-00-00-73-69-2D-01-00-01-18-4F-84-E8&text_type=hex&function=aes&mode=ecb&key=01010101010101010101010101010101&key_type=hex&do=form-submit&decrypt=do

我在这里做错了什么？还有其他AES128解密功能吗？

谢谢...

解决方法

尝试此代码；这是我的代码的一部分

AES解密

public string AESDecrypt(string cryptText){

   // Seed and construct the transformation used for decrypting
   AESCryptoAlgorithm.GenerateIV();
   AESCryptoAlgorithm.GenerateIV();
   byte[] iv = AESCryptoAlgorithm.IV;
   int ivSize = iv.Length;
   ICryptoTransform decryptor = AESCryptoAlgorithm.CreateDecryptor(AESKey,iv);

   // The crypt text is expected to be encoded in base64 format,decode it...
   byte[] cryptBytes = Convert.FromBase64String(cryptText);
   byte[] cryptBytes = Convert.FromBase64String(cryptText);
   byte[] clearBytes = decryptor.TransformFinalBlock(cryptBytes,cryptBytes.Length);

   return Encoding.ASCII.GetString(clearBytes,ivSize,clearBytes.Length - ivSize).TrimEnd('\0');
}

AES算法

protected Rijndael AESCryptoAlgorithm {
   get
   {
      if(_AESCryptoAlogrithm == null){
            _AESCryptoAlogrithm = Rijndael.Create();
            _AESCryptoAlogrithm.BlockSize = 128;
            _AESCryptoAlogrithm.Mode = CipherMode.CBC;
            _AESCryptoAlogrithm.Padding = PaddingMode.Zeros;
      }

      return _AESCryptoAlogrithm;
   }
}

十六进制解码

public static byte[] HexDecode(string hex){
   int len = hex.Length;
   byte[] bytes = new byte[len / 2];
   for (int i = 0; i < len; i += 2)
        bytes[i / 2] = Convert.ToByte(hex.Substring(i,2),16);
   return bytes;
}