public void EncryptTest()
{
string cipherText = AesAlgorithm.Encrypt(m_sourceString);
if (!String.IsNullOrWhiteSpace(cipherText))
{
Assert.IsNotNull(cipherText);
}
else
{
Assert.Fail();
}
}
static void Main(string[] args)
{
//Guid key generated with base64encoded and uppercase combination
var key = "A+W2nzdpbEe3UHrCBZU5Qw==";
//Console.WriteLine("Please enter a secret key for the symmetric algorithm.");
//var key = Console.ReadLine();
Console.WriteLine("Please enter a string for encryption");
var str = Console.ReadLine();
var encryptedString = AesAlgorithm.Encrypt(key, str);
Console.WriteLine($"encrypted string = {encryptedString}");
var decryptedString = AesAlgorithm.Decrypt(key, encryptedString);
Console.WriteLine($"decrypted string = {decryptedString}");
Console.ReadKey();
}
/// <summary>
/// Creates a new <see cref="Fortress"/> with a <see cref="MasterKey"/> and saves it encrypted.
/// </summary>
internal void WriteFortress(Fortress fortress, bool overwrite = false)
{
try
{
Logger.log.Info("Starting to write a fortress...");
var databasePath = Path.Combine(fortress.FullPath, TermHelper.GetDatabaseTerm());
// =========================================================== Create the root directory
IOPathHelper.CreateDirectory(fortress.FullPath);
Logger.log.Debug($"Created outer walls {fortress.FullPath}.");
// =========================================================== Create the sub directories for the database
IOPathHelper.CreateDirectory(databasePath);
Logger.log.Debug($"Created the {TermHelper.GetDatabaseTerm()}");
// =========================================================== Create the file which holds the salt to unlock the database
StoreSalt(fortress.FullPath, fortress.Salt);
Logger.log.Debug("Stored salt");
// =========================================================== Store the user Input and initial data in the database
foreach (var modelList in _unsecureDatacache.Values) // UnsecureDatacache
{
foreach (var model in modelList)
{
StoreOne(model);
}
}
foreach (var pair in _secureDatacache)
{
// We filter: Only if the sensible data has a parent we want to save it. Otherwise the parent has been deleted,
// which makes the sensible counterpart useless.
if (_unsecureDatacache.Values.Any(l => l.Any(m => m.Id == pair.Key)))
{
var byteModel = new ByteModel(pair.Key, pair.Value);
StoreOne(null, true, byteModel);
}
}
Logger.log.Debug("Stored fortress information.");
// =========================================================== Zip only the database
ZipHelper.ZipSavedArchives(databasePath, $"{databasePath}{TermHelper.GetZippedFileEnding()}");
Directory.Delete(databasePath, true);
Logger.log.Debug($"{TermHelper.GetDatabaseTerm()} has been zipped.");
// =========================================================== Encrypt the database
var aesAlg = new AesAlgorithm();
// Read all bytes from the database directory
var data = File.ReadAllBytes($"{databasePath}{TermHelper.GetZippedFileEnding()}");
// Encrypt it
var encryptedData = aesAlg.Encrypt(data, fortress.MasterKey.Value, fortress.Salt);
// Write the encrypted file
File.WriteAllBytes($"{databasePath}{TermHelper.GetDatabaseEnding()}", encryptedData);
// Delete the zip
File.Delete($"{databasePath}{TermHelper.GetZippedFileEnding()}");
Logger.log.Debug($"Encrypted {TermHelper.GetDatabaseTerm()}");
// =========================================================== Zip the whole fortress
if (overwrite)
{
File.Delete($"{fortress.FullPath}{TermHelper.GetZippedFileEnding()}");
}
ZipHelper.ZipSavedArchives(fortress.FullPath, $"{fortress.FullPath}{TermHelper.GetZippedFileEnding()}");
Directory.Delete(fortress.FullPath, true);
Logger.log.Debug("Fortress has been zipped.");
Logger.log.Info("Fortress has been sucessfully written!");
}
catch (Exception ex)
{
// Delete all changes that have been made to this point. We do not want half-built fortresses.
if (Directory.Exists(fortress.FullPath))
{
Directory.Delete(fortress.FullPath, true);
}
if (File.Exists(Path.Combine(fortress.FullPath, TermHelper.GetZippedFileEnding())))
{
File.Delete(fortress.FullPath + TermHelper.GetZippedFileEnding());
}
ex.SetUserMessage(WellKnownExceptionMessages.DataExceptionMessage());
throw ex;
}
}
/// <summary>
/// Encrypts the full file name using the file Key and Iv values with AES-OFB algorithm and encodes it to <see href="https://en.wikipedia.org/wiki/Base64">Base64</see>.
/// Since Base64 contains forward slash ('/') which is a <see href="https://docs.microsoft.com/en-us/windows/win32/fileio/naming-a-file">reserved character</see> that can't be used for file naming, every '/' is replaced with '$'.
/// </summary>
/// <param name="name">Full name of the file (name + extension) that is being encrypted.</param>
/// <param name="aes">AES algorithm used for decryption of the full file name.</param>
public void NameEncryption(string name, AesAlgorithm aes)
{
EncryptedName = Convert.ToBase64String(aes.Encrypt(Encoding.ASCII.GetBytes(name)));
EncryptedName = EncryptedName.Replace('/', '$');
}
