private static string GetFileEncryptionError(string inputFilePath)
{
if (Directory.Exists(inputFilePath))
{
return(null);
}
if (!File.Exists(inputFilePath))
{
return(_fileDoesNotExist);
}
bool?validMagicBytes = FileHandling.IsKryptorFile(inputFilePath);
if (validMagicBytes == null)
{
return(_fileInaccessible);
}
if (FileHandling.HasKryptorExtension(inputFilePath) || validMagicBytes == true)
{
return("This file is already encrypted.");
}
return(null);
}