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/*
* ecgen, tool for generating Elliptic curve domain parameters
* Copyright (C) 2017 J08nY
*/
/**
* @file types.h
*/
#ifndef ECGEN_TYPES_H
#define ECGEN_TYPES_H
#include <limits.h>
#include <pari/pari.h>
#include "misc/config.h"
/**
* @brief
* @param bits
* @param bitlen
* @param allocated
*/
typedef struct {
unsigned char *bits;
size_t bitlen;
size_t allocated;
} bits_t;
/**
* @brief
*/
typedef struct seed_t {
bits_t *seed;
unsigned char *hash20;
union {
struct {
GEN t;
GEN s;
GEN h;
GEN r;
} ansi;
struct {
bits_t *f;
} brainpool;
};
} seed_t;
/**
* @brief A point type.
* @param point a t_VEC with t_INTMOD or t_FFELT components [x,y]
* @param order a t_INT
* @param cofactor a t_INT
*/
typedef struct {
GEN point;
GEN order;
GEN cofactor;
} point_t;
/**
* @brief A curve type.
* @param seed a seed_t
* @param field a t_INT or t_FFELT
* @param a a t_INTMOD or t_FFELT a parameter
* @param b a t_INTMOD or t_FFELT b parameter
* @param curve a t_ELL, curve object
* @param order a t_INT, curve order
* @param generators generators saved
* @param ngens numver of generators saved in the curve type
* @param points points saved
* @param npoints number of points saved in the curve type
*/
typedef struct {
seed_t *seed;
GEN field;
GEN a;
GEN b;
GEN curve;
GEN order;
point_t **generators;
size_t ngens;
point_t **points;
size_t npoints;
} curve_t;
/**
* @brief
*/
typedef enum {
OFFSET_SEED = 0,
OFFSET_FIELD,
OFFSET_A,
OFFSET_B,
OFFSET_CURVE,
OFFSET_ORDER,
OFFSET_GENERATORS,
OFFSET_POINTS,
OFFSET_END
} offset_e;
/**
* @brief
*/
typedef struct {
const void *args;
size_t nargs;
void *allocd;
} arg_t;
/**
* @brief A generator function type.
* @param curve A curve_t being generated
* @param cfg An application config
* @param args Current optional generator argument
* @return state diff
*/
#define GENERATOR(gen_name) \
int gen_name(curve_t *curve, const config_t *cfg, arg_t *args)
typedef GENERATOR((*gen_t));
/**
* @brief An unroll function type
* @param curve
* @param cfg
* @param from
* @param to
* @return
*/
#define UNROLL(unroll_name) \
int unroll_name(curve_t *curve, const config_t *cfg, pari_sp from, \
pari_sp to)
typedef UNROLL((*unroll_t));
/**
* GENERATOR(gen_t)
*
*
* @param curve A curve_t being generated
* @param cfg An application config
* @param args unused
* @return state diff
*/
GENERATOR(gen_skip);
/**
* UNROLL(unroll_t)
*
* @param curve
* @param cfg
* @param from
* @param to
* @return
*/
UNROLL(unroll_skip);
#endif // ECGEN_TYPES_H
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