Added registration.

Currently doesn't return any valid result, hence host believes device
failed to register, however, insecure storage of keys does occur.

Streams.hpp

@@ -0,0 +1,9 @@
+#pragma once
+#include <cstdio>
+#include <memory>
+
+std::shared_ptr<FILE> getHostStream();
+std::shared_ptr<FILE> getComHostStream();
+std::shared_ptr<FILE> getHostPacketStream();
+std::shared_ptr<FILE> getComDevStream();
+std::shared_ptr<FILE> getDevPacketStream();