Class Key_file

key.hpp:45–108

};

struct Key_file {
public:
	struct Entry {
		uint32_t		version;
		unsigned char		aes_key[AES_KEY_LEN];
		unsigned char		hmac_key[HMAC_KEY_LEN];

		Entry ();

		void			load (std::istream&);
		void			load_legacy (uint32_t version, std::istream&);
		void			store (std::ostream&) const;
		void			generate (uint32_t version);
	};

	struct Malformed { }; // exception class
	struct Incompatible { }; // exception class

	const Entry*			get_latest () const;

	const Entry*			get (uint32_t version) const;
	void				add (const Entry&);

	void				load_legacy (std::istream&);
	void				load (std::istream&);
	void				store (std::ostream&) const;

	bool				load_from_file (const char* filename);
	bool				store_to_file (const char* filename) const;

	std::string			store_to_string () const;

	void				generate ();

	bool				is_empty () const { return entries.empty(); }
	bool				is_filled () const { return !is_empty(); }

	uint32_t			latest () const;

	void				set_key_name (const char* k) { key_name = k ? k : ""; }
	const char*			get_key_name () const { return key_name.empty() ? 0 : key_name.c_str(); }
private:
	typedef std::map<uint32_t, Entry, std::greater<uint32_t> > Map;
	enum { FORMAT_VERSION = 2 };

	Map				entries;
	std::string			key_name;

	void				load_header (std::istream&);

	enum {
		HEADER_FIELD_END	= 0,
		HEADER_FIELD_KEY_NAME	= 1
	};
	enum {
		KEY_FIELD_END		= 0,
		KEY_FIELD_VERSION	= 1,
		KEY_FIELD_AES_KEY	= 3,