/*
	luksrku - Tool to remotely unlock LUKS disks using TLS.
	Copyright (C) 2016-2016 Johannes Bauer

	This file is part of luksrku.

	luksrku is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; this program is ONLY licensed under
	version 3 of the License, later versions are explicitly excluded.

	luksrku is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with luksrku; if not, write to the Free Software
	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

	Johannes Bauer <JohannesBauer@gmx.de>
*/

#ifndef __GLOBAL_H__
#define __GLOBAL_H__

/* Magic is the prefix of announcement packages. It is the MD5SUM over the
 * CLIENT_PSK_IDENTITY. This only changes when the protocol that is spoken
 * changes. */
#define CLIENT_PSK_IDENTITY									"luksrku v1"
#define CLIENT_ANNOUNCE_MAGIC								{ 0x46, 0xf2, 0xf6, 0xc6, 0x63, 0x12, 0x2e, 0x00, 0xa0, 0x8a, 0xae, 0x42, 0x0c, 0x51, 0xf5, 0x65 }

#define LUKSRKU_VERSION										"0.01"

/* Size in bytes of the PSK that is used for TLS */
#define PSK_SIZE_BYTES										32

/* How many disks every entry may contain */
#define MAX_DISKS_PER_HOST									8

/* How long a passphrase can be maximally */
#define MAX_PASSPHRASE_LENGTH								64

/* How long in characters a cryptsetup device name mapping may be */
#define MAX_DEVMAPPER_NAME_LENGTH							63

/* In what interval the server should broadcast that it's waiting for unlocking */
#define WAITING_MESSAGE_BROADCAST_INTERVAL_MILLISECONDS		1000


#define BLACKLIST_ENTRY_COUNT								16
#define BLACKLIST_ENTRY_TIMEOUT_SECS						120

/* Scrypt parameters for config file encryption */
#define SCRYPT_N											(1 << 17)
#define SCRYPT_r											8
#define SCRYPT_p											1

#define staticassert(cond)		_Static_assert((cond), #cond)

#endif