2021-08-15 01:16:05
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();
}
}
}
John McAfee
3.6K viewsedited 22:16
J
