add encryption/decryption

1 files changed, 28 insertions, 0 deletions

diff --git a/lib/nes/app/ui/screen-prompt-key.hh b/lib/nes/app/ui/screen-prompt-key.hh
new file mode 100644
index 0000000..337e1b6
--- /dev/null
+++ b/lib/nes/app/ui/screen-prompt-key.hh
@@ -0,0 +1,28 @@
+#pragma once
+
+#include "nes/app/ui/screen.hh"
+#include "nes/common/containers/string-builder.hh"
+#include "nes/common/containers/string-view.hh"
+
+namespace nes::app
+{
+	class input_device_keyboard;
+
+	/// Prompts the user for a decryption key.
+	class screen_prompt_key final : public screen
+	{
+		static constexpr auto max_key_length = u32{ 23 };
+
+		input_device_keyboard& keyboard_;
+		string_view file_name_;
+		string_buffer<max_key_length> key_;
+
+	public:
+		explicit screen_prompt_key(input_device_keyboard&);
+
+		auto reset(string_view file_name) -> void;
+
+		auto render(renderer&) -> void override;
+		auto process_events() -> action override;
+	};
+} // namespace nes::app
\ No newline at end of file