public static void UsingPassword(string directoryPath, byte[] passwordBytes)
{
try
{
string[] filePaths = GetFiles(directoryPath);
string saltFilePath = Path.Combine(directoryPath, Constants.SaltFile);
if (!File.Exists(saltFilePath))
{
throw new FileNotFoundException("No salt file found. Unable to decrypt the directory. Please decrypt these files individually.");
}
byte[] salt = File.ReadAllBytes(saltFilePath);
if (salt.Length != Constants.SaltLength)
{
throw new ArgumentException("Invalid salt length.");
}
byte[] keyEncryptionKey = Argon2.DeriveKey(passwordBytes, salt);
DecryptEachFileWithPassword(filePaths, keyEncryptionKey);
Finalize(directoryPath, saltFilePath);
}
catch (Exception ex) when(ExceptionFilters.FileAccess(ex))
{
Logging.LogException(ex.ToString(), Logging.Severity.Error);
if (ex is ArgumentException || ex is FileNotFoundException)
{
DisplayMessage.FilePathError(directoryPath, ex.Message);
return;
}
DisplayMessage.FilePathException(directoryPath, ex.GetType().Name, "Unable to decrypt the directory.");
}
}
public static bool FileEncryption(string inputFilePath)
{
string errorMessage = GetFileEncryptionError(inputFilePath);
if (string.IsNullOrEmpty(errorMessage))
{
return(true);
}
DisplayMessage.FilePathError(inputFilePath, errorMessage);
return(false);
}
public static bool FileDecryption(string inputFilePath)
{
if (inputFilePath.Contains(Constants.SaltFile))
{
return(false);
}
string errorMessage = GetFileDecryptionError(inputFilePath);
if (string.IsNullOrEmpty(errorMessage))
{
return(true);
}
DisplayMessage.FilePathError(inputFilePath, errorMessage);
return(false);
}