if (a(console.readline,"Kanxue2019")== "4RTlF9Ca2+oqExJwx68FiA==")
..............
 //比较结果  是否相同
public static string a(string A_0, string A_1)
{
	byte[] bytes = Encoding.UTF8.GetBytes("Kanxue2019CTF-Q1");
	byte[] bytes2 = Encoding.UTF8.GetBytes(A_0);
	byte[] bytes3 = new PasswordDeriveBytes(A_1, null).GetBytes(32);//这里有毒
	ICryptoTransform transform = new RijndaelManaged                           //AES-Rijndael算法
	{
		Mode = CipherMode.CBC  // CBC 模式
	}.CreateEncryptor(bytes3, bytes);
	MemoryStream memoryStream = new MemoryStream();
	CryptoStream cryptoStream = new CryptoStream(memoryStream, transform, CryptoStreamMode.Write);
	cryptoStream.Write(bytes2, 0, bytes2.Length);
	cryptoStream.FlushFinalBlock();
	byte[] inArray = memoryStream.ToArray();
	memoryStream.Close();
	cryptoStream.Close();
	return Convert.ToBase64String(inArray);
}

b'\x6D\xDE\xF7\xA4\x3C\x00\x4F\x7D\x69\x83\x04\x4B\x1E\x36\xA9\x34\x59\xF1\x8B\xC8\x37\xC4\x6E\xAF\x32\x11\x32\x73\x41\x63\xA0\xB4'

import base64
from Crypto.Cipher import AES
from binascii import b2a_hex, a2b_hex


data = "4RTlF9Ca2+oqExJwx68FiA=="
cipher_data=base64.b64decode(data)
H = b'\xE1\x14\xE5\x17\xD0\x9A\xDB\xEA\x2A\x13\x12\x70\xC7\xAF\x05\x88'

key= b'\x6D\xDE\xF7\xA4\x3C\x00\x4F\x7D\x69\x83\x04\x4B\x1E\x36\xA9\x34\x59\xF1\x8B\xC8\x37\xC4\x6E\xAF\x32\x11\x32\x73\x41\x63\xA0\xB4'

IV=b'Kanxue2019CTF-Q1'

aes=AES.new(key,AES.MODE_CBC,IV)
r=aes.decrypt(H)

print(r)