public static StegoAlgorithm Create(AlgorithmEnum selection)
{
var type = Type.GetType(typeof(StegoAlgorithm).Namespace + "." + selection.ToString(), throwOnError: false);
if (type == null)
{
throw new NullReferenceException(selection.ToString() + " is not a known algorithm type");
}
if (!typeof(StegoAlgorithm).IsAssignableFrom(type))
{
throw new InvalidOperationException(type.Name + " does not inherit from StegoAlghorithm");
}
return((StegoAlgorithm)Activator.CreateInstance(type));
}
static void CompareHash(string filePath, string hash, AlgorithmEnum algorithm)
{
string fileHash = ComputeHash(filePath, algorithm);
// Make sure file hash was computed successfully and compare with given hash.
if (fileHash == null)
{
Console.WriteLine("Invalid hashing algorithm given. Valid options are: MD5, SHA1, SHA256, SHA384, and SHA512.");
}
else if (fileHash == hash)
{
Console.WriteLine($"{Path.GetFileName(filePath)} validated succcessfully.");
}
else
{
Console.WriteLine($"{algorithm.ToString()} validation FAILED!");
Console.WriteLine($"File hash is: \t\t\t{fileHash}\nBut the hash given was: \t{hash}");
}
}
public static string GetDescription(this AlgorithmEnum val)
{
var attributes = (DescriptionAttribute[])val.GetType().GetField(val.ToString()).GetCustomAttributes(typeof(DescriptionAttribute), false);
return(attributes.Length > 0 ? attributes[0].Description : string.Empty);
}