/*
 Derived from source code of TrueCrypt 7.1a, which is
 Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed
 by the TrueCrypt License 3.0.

 Modifications and additions to the original source code (contained in this file)
 and all other portions of this file are Copyright (c) 2013-2016 IDRIX
 and are governed by the Apache License 2.0 the full text of which is
 contained in the file License.txt included in VeraCrypt binary and source
 code distribution packages.
*/

#ifndef TC_HEADER_Encryption_Keyfile
#define TC_HEADER_Encryption_Keyfile

#include "Platform/Platform.h"
#include "Platform/Stream.h"
#include "VolumePassword.h"

namespace VeraCrypt
{
	class Keyfile;
	typedef list < shared_ptr <Keyfile> > KeyfileList;

	class Keyfile
	{
	public:
		Keyfile (const FilesystemPath &path) : Path (path) { }
		virtual ~Keyfile () { };

		operator FilesystemPath () const { return Path; }
		static shared_ptr <VolumePassword> ApplyListToPassword (shared_ptr <KeyfileList> keyfiles, shared_ptr <VolumePassword> password);
		static shared_ptr <KeyfileList> DeserializeList (shared_ptr <Stream> stream, const string &name);
		static void SerializeList (shared_ptr <Stream> stream, const string &name, shared_ptr <KeyfileList> keyfiles);
		static bool WasHiddenFilePresentInKeyfilePath() { bool r = HiddenFileWasPresentInKeyfilePath; HiddenFileWasPresentInKeyfilePath = false; return r; }

		static const size_t MinProcessedLength = 1;
		static const size_t MaxProcessedLength = 1024 * 1024;

	protected:
		void Apply (const BufferPtr &pool) const;

		static bool HiddenFileWasPresentInKeyfilePath;

		FilesystemPath Path;

	private:
		Keyfile (const Keyfile &);
		Keyfile &operator= (const Keyfile &);
	};
}

#endif // TC_HEADER_Encryption_Keyfile