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); ICryptoTransform cryptoTransform = new RijndaelManaged { Mode = CipherMode.CBC }.CreateDecryptor(bytes3, bytes); byte[] array = Convert.FromBase64String("4RTlF9Ca2+oqExJwx68FiA=="); byte[] inArray= cryptoTransform.TransformFinalBlock(array, 0, array.Length); return System.Text.Encoding.Default.GetString(inArray); }
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