private static void Decrypt(string[] arguments)
{
using (RijndaelManaged myRijndael = new RijndaelManaged())
{
Console.WriteLine("Key path:");
byte[] key = File.ReadAllBytes(EncryptionReadLine());
Console.WriteLine("IV path ('Enter' for none):");
byte[] IV = File.ReadAllBytes(EncryptionReadLine());
Console.WriteLine("\nDecryption finished.");
// Use key from key path
myRijndael.Key = key;
if (IV.Length > 0)
{
myRijndael.IV = IV;
}
else
{
myRijndael.GenerateIV();
}
string filePath = arguments[0];
// Get the decrypted byte array from filePath
byte[] encrypted = File.ReadAllBytes(filePath);
// Decrypt the bytes to a string.
string decrypted = Crypher.DecryptStringFromBytes(encrypted, myRijndael.Key, myRijndael.IV);
if (arguments.Length > 1)
{
string decryptedFilePath = arguments[1];
Console.WriteLine($"Decrypted text is in: '{decryptedFilePath}'");
File.WriteAllText(decryptedFilePath, decrypted);
}
else
{
Console.WriteLine("Decrypted text is:\n\n" + decrypted);
}
}
}
private static void Encrypt(string[] arguments)
{
/*
* Create a new instance of the RijndaelManaged
* class. This generates a new key and initialization
* vector (IV).
*/
using (RijndaelManaged myRijndael = new RijndaelManaged())
{
Console.WriteLine("Input key path. (Press 'Enter' to autogenerate)");
string keyPath = EncryptionReadLine();
string IVPath = string.Empty;
if (keyPath == String.Empty)
{
myRijndael.GenerateKey();
myRijndael.GenerateIV();
}
else
{
myRijndael.Key = File.ReadAllBytes(keyPath);
Console.WriteLine("Input IV path. (Press 'Enter' to autogenerate)");
IVPath = EncryptionReadLine();
if (IVPath == String.Empty)
{
myRijndael.GenerateIV();
}
else
{
myRijndael.IV = File.ReadAllBytes(IVPath);
}
}
// Example: encrypt {filePath} {encryptedFilePath}
// Reads from filePath and writes encrypted output to encryptedFilePath.
if (arguments.Length > 1)
{
string filePath = arguments[0];
string encrypredFilePath = arguments[1];
string text = File.ReadAllText(filePath);
// Encrypt the string to an array of bytes.
byte[] encrypted = Crypher.EncryptStringToBytes(text, myRijndael.Key, myRijndael.IV);
// Create file with the encrypted output.
File.WriteAllBytes(encrypredFilePath, encrypted);
}
// Example: encrypt
// Simply prints encrypted input to console.
else
{
Console.WriteLine("Text to encrypt: ");
string text = EncryptionReadLine();
byte[] encrypted = Crypher.EncryptStringToBytes(text, myRijndael.Key, myRijndael.IV);
Console.WriteLine(Convert.ToBase64String(encrypted));
}
Console.WriteLine("\nEncryption finished.");
// Send key to separate text file.
if (keyPath == String.Empty)
{
File.WriteAllBytes("key.txt", myRijndael.Key);
File.WriteAllBytes("IV.txt", myRijndael.IV);
Console.WriteLine("Your key is in 'key.txt'.\nYour IV is in 'IV.txt'.");
}
else if (IVPath == String.Empty)
{
File.WriteAllBytes("IV.txt", myRijndael.IV);
Console.WriteLine("Your IV is in 'IV.txt'.");
}
}
}