/* *********************************************************************

 *

 * Sun elects to have this file available under and governed by the

 * Mozilla Public License Version 1.1 ("MPL") (see

 * http://www.mozilla.org/MPL/ for full license text). For the avoidance

 * of doubt and subject to the following, Sun also elects to allow

 * licensees to use this file under the MPL, the GNU General Public

 * License version 2 only or the Lesser General Public License version

 * 2.1 only. Any references to the "GNU General Public License version 2

 * or later" or "GPL" in the following shall be construed to mean the

 * GNU General Public License version 2 only. Any references to the "GNU

 * Lesser General Public License version 2.1 or later" or "LGPL" in the

 * following shall be construed to mean the GNU Lesser General Public

 * License version 2.1 only. However, the following notice accompanied

 * the original version of this file:

 *

 * Version: MPL 1.1/GPL 2.0/LGPL 2.1

 *

 * The contents of this file are subject to the Mozilla Public License Version

 * 1.1 (the "License"); you may not use this file except in compliance with

 * the License. You may obtain a copy of the License at

 * http://www.mozilla.org/MPL/

 *

 * Software distributed under the License is distributed on an "AS IS" basis,

 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License

 * for the specific language governing rights and limitations under the

 * License.

 *

 * The Original Code is the elliptic curve math library.

 *

 * The Initial Developer of the Original Code is

 * Sun Microsystems, Inc.

 * Portions created by the Initial Developer are Copyright (C) 2003

 * the Initial Developer. All Rights Reserved.

 *

 * Contributor(s):

 *   Douglas Stebila <douglas@stebila.ca>, Sun Microsystems Laboratories

 *

 * Alternatively, the contents of this file may be used under the terms of

 * either the GNU General Public License Version 2 or later (the "GPL"), or

 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),

 * in which case the provisions of the GPL or the LGPL are applicable instead

 * of those above. If you wish to allow use of your version of this file only

 * under the terms of either the GPL or the LGPL, and not to allow others to

 * use your version of this file under the terms of the MPL, indicate your

 * decision by deleting the provisions above and replace them with the notice

 * and other provisions required by the GPL or the LGPL. If you do not delete

 * the provisions above, a recipient may use your version of this file under

 * the terms of any one of the MPL, the GPL or the LGPL.

 *

 *********************************************************************** */

/*

 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.

 * Use is subject to license terms.

 */

#ifndef _ECL_H

#define _ECL_H

#pragma ident   "%Z%%M% %I%     %E% SMI"

/* Although this is not an exported header file, code which uses elliptic

 * curve point operations will need to include it. */

#include "ecl-exp.h"

#include "mpi.h"

struct ECGroupStr;

typedef struct ECGroupStr ECGroup;

/* Construct ECGroup from hexadecimal representations of parameters. */

ECGroup *ECGroup_fromHex(const ECCurveParams * params, int kmflag);

/* Construct ECGroup from named parameters. */

ECGroup *ECGroup_fromName(const ECCurveName name, int kmflag);

/* Free an allocated ECGroup. */

void ECGroup_free(ECGroup *group);

/* Construct ECCurveParams from an ECCurveName */

ECCurveParams *EC_GetNamedCurveParams(const ECCurveName name, int kmflag);

/* Duplicates an ECCurveParams */

ECCurveParams *ECCurveParams_dup(const ECCurveParams * params, int kmflag);

/* Free an allocated ECCurveParams */

void EC_FreeCurveParams(ECCurveParams * params);

/* Elliptic curve scalar-point multiplication. Computes Q(x, y) = k * P(x,

 * y).  If x, y = NULL, then P is assumed to be the generator (base point)

 * of the group of points on the elliptic curve. Input and output values

 * are assumed to be NOT field-encoded. */

mp_err ECPoint_mul(const ECGroup *group, const mp_int *k, const mp_int *px,

                                   const mp_int *py, mp_int *qx, mp_int *qy);

/* Elliptic curve scalar-point multiplication. Computes Q(x, y) = k1 * G +

 * k2 * P(x, y), where G is the generator (base point) of the group of

 * points on the elliptic curve. Input and output values are assumed to

 * be NOT field-encoded. */

mp_err ECPoints_mul(const ECGroup *group, const mp_int *k1,

                                        const mp_int *k2, const mp_int *px, const mp_int *py,

                                        mp_int *qx, mp_int *qy);

/* Validates an EC public key as described in Section 5.2.2 of X9.62.

 * Returns MP_YES if the public key is valid, MP_NO if the public key

 * is invalid, or an error code if the validation could not be

 * performed. */

mp_err ECPoint_validate(const ECGroup *group, const mp_int *px, const

                                        mp_int *py);

#endif /* _ECL_H */