public static void EncryptFolder(Encrypters encrypter)
{
byte[] key = null;
byte[] iv = null;
switch (encrypter)
{
case Encrypters.DES:
key = GenerateNumbers(8);
iv = GenerateNumbers(8);
break;
case Encrypters.TRIPLEDES:
key = GenerateNumbers(16);
iv = GenerateNumbers(8);
break;
case Encrypters.AES:
key = GenerateNumbers(32);
iv = GenerateNumbers(16);
break;
}
EncryptFolder(encrypter, key, iv);
}
/// <summary>
/// Method for decrypting data
/// </summary>
/// <param name="encrypter">What encryption is used</param>
/// <param name="message">The message to decrypt</param>
/// <param name="key">The encryption key</param>
/// <param name="iv">the encryption iv</param>
/// <returns>Returns a decrypted byte[]</returns>
public static void DecryptFolder(Encrypters encrypter, byte[] key, byte[] iv)
{
watch = new Stopwatch();
watch.Start();
SymmetricAlgorithm algorithm = null;
switch (encrypter)
{
case Encrypters.DES:
algorithm = DESCryptoServiceProvider.Create();
break;
case Encrypters.TRIPLEDES:
algorithm = TripleDESCryptoServiceProvider.Create();
break;
case Encrypters.AES:
algorithm = AesCryptoServiceProvider.Create();
break;
}
algorithm.Mode = CipherMode.CBC;
algorithm.Padding = PaddingMode.PKCS7;
try
{
algorithm.Key = key;
algorithm.IV = iv;
}
catch (FormatException e)
{
Console.WriteLine("Make sure to use the correct encryption method");
throw e;
}
using (var memoryStream = new MemoryStream())
{
var cryptoStream = new CryptoStream(memoryStream, algorithm.CreateDecryptor(),
CryptoStreamMode.Write);
foreach (string file in Directory.GetFiles(Environment.CurrentDirectory, "*.txt"))
{
byte[] fileText = File.ReadAllBytes(file);
cryptoStream.Write(fileText, 0, fileText.Length);
cryptoStream.FlushFinalBlock();
File.WriteAllBytes(file, memoryStream.ToArray());
}
watch.Stop();
Console.WriteLine("Stopwatch took " + watch.ElapsedMilliseconds + "ms to decrypt");
}
}
/// <summary>
/// Method for encrypting txt files in current directory
/// </summary>
/// <param name="encrypter">Method for encryption</param>
/// <param name="key">The key used to encrypt with</param>
/// <param name="iv">The iv used to encrypt with</param>
public static void EncryptFolder(Encrypters encrypter, byte[] key, byte[] iv)
{
watch = new Stopwatch();
watch.Start();
SymmetricAlgorithm algorithm = null;
switch (encrypter)
{
case Encrypters.DES:
algorithm = DESCryptoServiceProvider.Create();
break;
case Encrypters.TRIPLEDES:
algorithm = TripleDESCryptoServiceProvider.Create();
break;
case Encrypters.AES:
algorithm = AesCryptoServiceProvider.Create();
break;
}
algorithm.Mode = CipherMode.CBC;
algorithm.Padding = PaddingMode.PKCS7;
algorithm.Key = key;
algorithm.IV = iv;
using (var memoryStream = new MemoryStream())
{
var cryptoStream = new CryptoStream(memoryStream, algorithm.CreateEncryptor(),
CryptoStreamMode.Write);
foreach (string file in Directory.GetFiles(Environment.CurrentDirectory, "*.txt"))
{
byte[] fileText = File.ReadAllBytes(file);
cryptoStream.Write(fileText, 0, fileText.Length);
cryptoStream.FlushFinalBlock();
File.WriteAllBytes(file, memoryStream.ToArray());
}
watch.Stop();
Console.WriteLine("Stopwatch took: " + watch.ElapsedMilliseconds + "ms to complete \n" +
"Remember to save the key and IV somewhere");
Console.WriteLine("Key:" + Convert.ToBase64String(algorithm.Key) + "\n" +
"IV: " + Convert.ToBase64String(algorithm.IV));
}
}
