/* keysize_descriptor.h */

/*

This file is part of the AVR-Crypto-Lib.

Copyright (C) 2009 Daniel Otte (daniel.otte@rub.de)

This program 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, either version 3 of the License, or

(at your option) any later version.

This program 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 this program. If not, see <http://www.gnu.org/licenses/>.

*/

/**

* \file keysize_descriptor.h

* \author Daniel Otte

* \email daniel.otte@rub.de

* \date 2009-01-07

* \license GPLv3 or later

*/

#ifndef KEYSIZE_DESCRIPTOR_H_

#define KEYSIZE_DESCRIPTOR_H_

#include <stdint.h>

#include <avr/pgmspace.h>

#define KS_TYPE_TERMINATOR 0x00

#define KS_TYPE_LIST 0x01

#define KS_TYPE_RANGE 0x02

#define KS_TYPE_ARG_RANGE 0x03

#define KS_INT(a) ((a)&0xFF), ((a)>>8)

typedef struct{ /* keysize is valid if listed in items */

uint8_t n_items; /* number of items (value 0 is reserved) */

uint16_t items[]; /* list of valid lengths */

}keysize_desc_list_t;

typedef struct{ /* keysize is valid if min<=keysize<=max */

uint16_t min;

uint16_t max;

}keysize_desc_range_t;

typedef struct{ /* keysize is valid if min<=keysize<=max and if keysize mod distance == offset */

uint16_t min;

uint16_t max;

uint16_t distance;

uint16_t offset;

}keysize_desc_arg_range_t;

uint8_t is_valid_keysize_P(PGM_VOID_P ks_desc, uint16_t keysize);

uint16_t get_keysize(PGM_VOID_P ks_desc);

uint16_t get_keysizes(PGM_VOID_P ks_desc, uint16_t** list);

#endif /* KEYSIZE_DESCRIPTOR_H_ */