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/*
* ecgen, tool for generating Elliptic curve domain parameters
* Copyright (C) 2017 J08nY
*/
/**
* @file curve.h
*/
#ifndef ECGEN_CURVE_H
#define ECGEN_CURVE_H
#include <pari/pari.h>
#include "io/cli.h"
#include "types.h"
/**
* GENERATOR(gen_t)
* Creates a curve GEN in curve_t curve from field, a and b.
* Always succeeds.
*
* @param curve
* @param config
* @param args unused
* @return state diff
*/
int curve_init(curve_t *curve, config_t *config, arg_t *args);
/**
* GENERATOR(gen_t)
* Creates a curve GEN in curve_t curve from field, a and b.
* Succeeds if a curve exists(non-zero discriminant).
*
* @param curve
* @param config
* @param args unused
* @return state diff
*/
int curve_nonzero(curve_t *curve, config_t *config, arg_t *args);
/**
* GENERATOR(gen_t)
* Creates a curve GEN in curve_t curve from field, a and b. Using the ANSI
* X9.62 verifiably random algorithm.
* Succeeds if a curve exists(non-zero discriminant).
*
* @param curve
* @param config
* @param args unused
* @return state diff
*/
int curve_seed(curve_t *curve, config_t *config, arg_t *args);
/**
* Serializes curve parameters into a t_VEC:
* - prime field:
* p,a,b,order,(point.x, point.y, point.order)*
* - binary field:
* e1,e2,e3,a,b,order,(point.x, point.y, point.order)*
*
* @param curve to serialize
* @return a t_VEC of curve parameters
*/
GEN curve_params(curve_t *curve);
/**
* Allocates and zeros out a new curve_t object.
* @return new curve
*/
curve_t *curve_new(void);
/**
* Copies parameters from src curve to dest curve, allocates space for points.
* Otherwise expects everything to be allocated.
*
* @param src source curve
* @param dest destination curve
* @return destination curve
*/
curve_t *curve_copy(curve_t *src, curve_t *dest);
/**
* Free a curve_t along with it's seed_t and point_ts.
* @param curve to free
*/
void curve_free(curve_t **curve);
#endif // ECGEN_CURVE_H
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