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/*
* seccure - Copyright 2014 B. Poettering
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program. If not, see
* <http://www.gnu.org/licenses/>.
*/
/*
* SECCURE Elliptic Curve Crypto Utility for Reliable Encryption
*
* http://point-at-infinity.org/seccure/
*
*
* seccure implements a selection of asymmetric algorithms based on
* elliptic curve cryptography (ECC). See the manpage or the project's
* homepage for further details.
*
* This code links against the GNU gcrypt library "libgcrypt" (which
* is part of the GnuPG project). Use the included Makefile to build
* the binary.
*
* Report bugs to: seccure AT point-at-infinity.org
*
*/
#ifndef INC_ECC_H
#define INC_ECC_H
#include <gcrypt.h>
struct affine_point {
gcry_mpi_t x, y;
};
struct jacobian_point {
gcry_mpi_t x, y, z;
};
struct domain_params {
gcry_mpi_t a, b, m, order;
struct affine_point base;
int cofactor;
};
struct affine_point point_new(void);
void point_release(struct affine_point *p);
void point_set(struct affine_point *p1, const struct affine_point *p2);
void point_load_zero(struct affine_point *p);
int point_is_zero(const struct affine_point *p);
int point_on_curve(const struct affine_point *p,
const struct domain_params *dp);
int point_compress(const struct affine_point *p);
int point_decompress(struct affine_point *p, const gcry_mpi_t x, int yflag,
const struct domain_params *dp);
void point_double(struct affine_point *p, const struct domain_params *dp);
void point_add(struct affine_point *p1, const struct affine_point *p2,
const struct domain_params *dp);
struct jacobian_point jacobian_new(void);
void jacobian_release(struct jacobian_point *p);
void jacobian_load_affine(struct jacobian_point *p1,
const struct affine_point *p2);
void jacobian_load_zero(struct jacobian_point *p);
int jacobian_is_zero(const struct jacobian_point *p);
void jacobian_double(struct jacobian_point *p, const struct domain_params *dp);
void jacobian_affine_point_add(struct jacobian_point *p1,
const struct affine_point *p2,
const struct domain_params *dp);
struct affine_point jacobian_to_affine(const struct jacobian_point *p,
const struct domain_params *dp);
struct affine_point pointmul(const struct affine_point *p,
const gcry_mpi_t exp,
const struct domain_params *dp);
int embedded_key_validation(const struct affine_point *p,
const struct domain_params *dp);
int full_key_validation(const struct affine_point *p,
const struct domain_params *dp);
#endif /* INC_ECC_H */
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