using System;

using System.Text;

using System.IO;

using System.Security.Cryptography;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("https//opensea[.]io/collection/contingency-protocol-44924");

        Console.WriteLine();

        //CONTINGENCY PROTOCOL 44924 COLLECTION DESCRIPTION

        //MD5: 346257E94DA2E0D0D0F54AA397D291F0

        //DATA: Q Society

        string collectiondescriptiondecoded = "Q Society";

        MD5 md5Hash = MD5.Create();

        byte[] md5 = md5Hash.ComputeHash(Encoding.UTF8.GetBytes(collectiondescriptiondecoded));

        Console.WriteLine("Verified: [Q Society] = " + BitConverter.ToString(md5).Replace("-", "") + " Initialization Vector");// or Key or Who the fuck knows? LULZZZ 

        Console.WriteLine();

        //SQME KEYS TO TEST

        byte[] testkey0 = Encoding.UTF8.GetBytes("rustyshackleford");

        byte[] testkey1 = Encoding.UTF8.GetBytes("Q H7^PZBVTpZ7302");

        //https//www[.]britbonglogpost[.]com/978ea96f-2740-4ea6-b1d0-288f11a48ff7.jpg

        byte[] testkey2 = HexStringToByteArray("978ea96f-2740-4ea6-b1d0-288f11a48ff7".Replace("-", ""));

        //NFT IMAGE DESCRIPTIONS - BASE64 ENCODED DATA

        //https[:]//opensea[.]io/assets/0x495f947276749ce646f68ac8c248420045cb7b5e/42715653451494116278904116357368839356782358833774246712130390239617933639681

        string epsilon_b64 = "mbhD5klu/+mMNw6nN8bmE7+m4MWKp9ZMzO61R83YPGc23pCnwNXl6XnRPizFWi+k35YtNRsXiT20P7KNiV6Bz/jwBGq3PjQv2Zd14gORArKA6Cz30JEU9Sa6GGCEpJIufbFJuWWxaI9NTnGCrshcDDvIne9DvhwSTvcJHMOCAkeBNiRwxb/tCK17mclpwgV1fKXDhrCfzddOW2bTO14c0w==";

        //https[:]//opensea[.]io/assets/0x495f947276749ce646f68ac8c248420045cb7b5e/42715653451494116278904116357368839356782358833774246712130390238518422011905

        string omega_b64 = "QWIn8NzJMuDZIfibj/MqK1CPK32YXf3KuzCsf4HohUPSmUgyqAdY6moE98U6v3wVGTu2g1+ZziW+tqk9cVif41v+GC91bgnym7NlX9URAY/LLE9X9amJw3Qxa4PyNWat/dVkEOUFoa3vAE6TCVgk/gfWzB8085VW7A6hBcoR0D1tv9U5HrylObyNdm2I6ljim5XVXA9XRkLKffQReXWkAS7R34IQYsipc9jOaf/LlaCPputybuz5cKWaq/q6kbRksksbPL6v4F/omjkBHOJiqWxKHRkEgSIOEEEgIQHqk5h5Tnf7O7I5/eyDXGPAYBS2I7IwMmykLp7CG9nFLg5FDHmNgQZD4vOFrJcjoYcH3mg=";

        //DECODE BASE64

        var epsilon = Convert.FromBase64String(epsilon_b64);

        var omega = Convert.FromBase64String(omega_b64);

        //AES CRYPTO

        var crypto = new AesCryptographyService();

        Console.WriteLine("Epsilon: " + epsilon_b64);

        Console.WriteLine("B64 Decoded: " + BitConverter.ToString(epsilon).Replace("-", ""));

        Console.WriteLine("To String: " + Encoding.UTF8.GetString(epsilon));

        Console.WriteLine();

        var decrypted = crypto.Decrypt(epsilon, testkey0, md5);

        Console.WriteLine("Trying Key: " + BitConverter.ToString(testkey0).Replace("-", "") + " IV: " + BitConverter.ToString(md5).Replace("-", ""));

        Console.WriteLine("Decrypted: " + BitConverter.ToString(decrypted).Replace("-", ""));

        Console.WriteLine("To String" + Encoding.UTF8.GetString(decrypted));

        Console.WriteLine();

        decrypted = crypto.Decrypt(epsilon, testkey1, md5);

        Console.WriteLine("Trying Key: " + BitConverter.ToString(testkey1).Replace("-", "") + " IV: " + BitConverter.ToString(md5).Replace("-", ""));

        Console.WriteLine("Decrypted: " + BitConverter.ToString(decrypted).Replace("-", ""));

        Console.WriteLine("To String" + Encoding.UTF8.GetString(decrypted));

        Console.WriteLine();

        decrypted = crypto.Decrypt(epsilon, testkey2, md5);

        Console.WriteLine("Trying Key: " + BitConverter.ToString(testkey2).Replace("-", "") + " IV: " + BitConverter.ToString(md5).Replace("-", ""));

        Console.WriteLine("Decrypted: " + BitConverter.ToString(decrypted).Replace("-", ""));

        Console.WriteLine("To String" + Encoding.UTF8.GetString(decrypted));

        Console.WriteLine();

        Console.WriteLine();

        Console.WriteLine();

    }

​

    public static byte[] HexStringToByteArray(String hex)

    {

        int NumberChars = hex.Length;

        byte[] bytes = new byte[NumberChars / 2];

        for (int i = 0; i < NumberChars; i += 2)

            bytes[i / 2] = Convert.ToByte(hex.Substring(i, 2), 16);

        return bytes;

    }

}

​

public class AesCryptographyService

{

    public byte[] Encrypt(byte[] data, byte[] key, byte[] iv)

    {

        using (var aes = Aes.Create())

        {

            aes.KeySize = 128;

            aes.BlockSize = 128;

            aes.Padding = PaddingMode.Zeros;

            aes.Key = key;

            aes.IV = iv;

            using (var encryptor = aes.CreateEncryptor(aes.Key, aes.IV))

            {

                return PerformCryptography(data, encryptor);

            }

        }

    }

​

    public byte[] Decrypt(byte[] data, byte[] key, byte[] iv)

    {

        using (var aes = Aes.Create())

        {

            aes.KeySize = 128;

            aes.BlockSize = 128;

            aes.Padding = PaddingMode.Zeros;

            aes.Key = key;

            aes.IV = iv;

            using (var decryptor = aes.CreateDecryptor(aes.Key, aes.IV))

            {

                return PerformCryptography(data, decryptor);

            }

        }

    }

​

    private byte[] PerformCryptography(byte[] data, ICryptoTransform cryptoTransform)

    {

        using (var ms = new MemoryStream())

            using (var cryptoStream = new CryptoStream(ms, cryptoTransform, CryptoStreamMode.Write))

            {

                cryptoStream.Write(data, 0, data.Length);

                cryptoStream.FlushFinalBlock();

                return ms.ToArray();

            }

    }

}