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/* streamcipher_descriptor.h */
/*
This file is part of the AVR-Crypto-Lib.
Copyright (C) 2011 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 stremcipher_descriptor.h
* \author Daniel Otte
* \date 2011-01-15
*
* \license GPLv3 or later
*
*/
#ifndef STREAMCIPHER_DESCRIPTOR_H_
#define STREAMCIPHER_DESCRIPTOR_H_
#include <stdint.h>
#include <avr/pgmspace.h>
#ifndef VOID_FPT
#define VOID_FPT
typedef void(*void_fpt)(void);
#endif
typedef void(*sc_init1_fpt)(const void*, void*); /* key of fixed length, no IV*/
typedef void(*sc_init2_fpt)(const void*, const void*, void*); /* key and IV of fixed length */
typedef void(*sc_init3_fpt)(const void*, uint16_t,void*); /* key of variable length, no IV */
typedef void(*sc_init4_fpt)(const void*, uint16_t,const void*, void*); /* key of variable length, IV of fixed length */
typedef void(*sc_init5_fpt)(const void*, uint16_t,const void*, uint16_t, void*); /* key and IV of variable length */
typedef uint8_t(*sc_gen1_fpt)(void*); /* return keystream data */
typedef void(*sc_gen2_fpt)(void*, void*); /* write keystream data to buffer */
typedef uint8_t(*sc_genra1_fpt)(void*, uint64_t); /* return keystream data */
typedef void(*sc_genra2_fpt)(void*, void*, uint64_t); /* write keystream data to buffer */
typedef void(*sc_free_fpt)(void*);
typedef union{
void_fpt initvoid;
sc_init1_fpt init1;
sc_init2_fpt init2;
sc_init3_fpt init3;
sc_init4_fpt init4;
sc_init5_fpt init5;
} sc_init_fpt;
typedef union{
void_fpt genvoid;
sc_gen1_fpt gen1;
sc_gen2_fpt gen2;
} sc_gen_fpt;
typedef union{
void_fpt genravoid;
sc_genra1_fpt genra1;
sc_genra2_fpt genra2;
} sc_genra_fpt;
#define SC_INIT_TYPE 0x07
#define SC_INIT_TYPE_1 0x00 /* key of fixed length, no IV*/
#define SC_INIT_TYPE_2 0x02 /* key and IV of fixed length */
#define SC_INIT_TYPE_3 0x03 /* key of variable length, no IV */
#define SC_INIT_TYPE_4 0x04 /* key of variable length, IV of fixed length */
#define SC_INIT_TYPE_5 0x05 /* key and IV of variable length */
#define SC_GEN_TYPE 0x08
#define SC_GEN_TYPE_1 0x00 /* return data stream byte */
#define SC_GEN_TYPE_2 0x08 /* write data stream block into buffer */
#define SCDESC_TYPE_STREAMCIPHER 0x03
typedef struct {
uint8_t type; /* 3 == streamcipher */
uint8_t flags;
PGM_P name;
size_t ctxsize_B;
uint16_t gensize_b;
sc_init_fpt init;
sc_gen_fpt gen;
sc_genra_fpt genra;
sc_free_fpt free;
PGM_VOID_P valid_keysize_desc;
PGM_VOID_P valid_ivsize_desc;
} scdesc_t; /* streamcipher descriptor type */
typedef struct{
const scdesc_t *desc_ptr;
size_t keysize;
size_t ivsize;
uint16_t index;
uint8_t* buffer;
void* ctx;
} scgen_ctx_t;
#endif /* STREAMCIPHER_DESCRIPTOR_H_ */