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

 *

 * 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.

 *

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

/*

 * Use is subject to license terms.

 */

#include "ecl.h"

#include "ecl-curve.h"

#include "ecl-priv.h"

#ifndef _KERNEL

#include <stdlib.h>

#include <string.h>

#endif

#define CHECK(func) if ((func) == NULL) { res = 0; goto CLEANUP; }

/* Duplicates an ECCurveParams */

ECCurveParams *

ECCurveParams_dup(const ECCurveParams * params, int kmflag)

{

        int res = 1;

        ECCurveParams *ret = NULL;

#ifdef _KERNEL

        ret = (ECCurveParams *) kmem_zalloc(sizeof(ECCurveParams), kmflag);

#else

        CHECK(ret = (ECCurveParams *) calloc(1, sizeof(ECCurveParams)));

#endif

        if (params->text != NULL) {

#ifdef _KERNEL

                ret->text = kmem_alloc(strlen(params->text) + 1, kmflag);

                bcopy(params->text, ret->text, strlen(params->text) + 1);

#else

                CHECK(ret->text = strdup(params->text));

#endif

        }

        ret->field = params->field;

        ret->size = params->size;

        if (params->irr != NULL) {

#ifdef _KERNEL

                ret->irr = kmem_alloc(strlen(params->irr) + 1, kmflag);

                bcopy(params->irr, ret->irr, strlen(params->irr) + 1);

#else

                CHECK(ret->irr = strdup(params->irr));

#endif

        }

        if (params->curvea != NULL) {

#ifdef _KERNEL

                ret->curvea = kmem_alloc(strlen(params->curvea) + 1, kmflag);

                bcopy(params->curvea, ret->curvea, strlen(params->curvea) + 1);

#else

                CHECK(ret->curvea = strdup(params->curvea));

#endif

        }

        if (params->curveb != NULL) {

#ifdef _KERNEL

                ret->curveb = kmem_alloc(strlen(params->curveb) + 1, kmflag);

                bcopy(params->curveb, ret->curveb, strlen(params->curveb) + 1);

#else

                CHECK(ret->curveb = strdup(params->curveb));

#endif

        }

        if (params->genx != NULL) {

#ifdef _KERNEL

                ret->genx = kmem_alloc(strlen(params->genx) + 1, kmflag);

                bcopy(params->genx, ret->genx, strlen(params->genx) + 1);

#else

                CHECK(ret->genx = strdup(params->genx));

#endif

        }

        if (params->geny != NULL) {

#ifdef _KERNEL

                ret->geny = kmem_alloc(strlen(params->geny) + 1, kmflag);

                bcopy(params->geny, ret->geny, strlen(params->geny) + 1);

#else

                CHECK(ret->geny = strdup(params->geny));

#endif

        }

        if (params->order != NULL) {

#ifdef _KERNEL

                ret->order = kmem_alloc(strlen(params->order) + 1, kmflag);

                bcopy(params->order, ret->order, strlen(params->order) + 1);

#else

                CHECK(ret->order = strdup(params->order));

#endif

        }

        ret->cofactor = params->cofactor;

  CLEANUP:

        if (res != 1) {

                EC_FreeCurveParams(ret);

                return NULL;

        }

        return ret;

}

#undef CHECK

/* Construct ECCurveParams from an ECCurveName */

ECCurveParams *

EC_GetNamedCurveParams(const ECCurveName name, int kmflag)

{

        if ((name <= ECCurve_noName) || (ECCurve_pastLastCurve <= name) ||

                                        (ecCurve_map[name] == NULL)) {

                return NULL;

        } else {

                return ECCurveParams_dup(ecCurve_map[name], kmflag);

        }

}

/* Free the memory allocated (if any) to an ECCurveParams object. */

void

EC_FreeCurveParams(ECCurveParams * params)

{

        if (params == NULL)

                return;

        if (params->text != NULL)

#ifdef _KERNEL

                kmem_free(params->text, strlen(params->text) + 1);

#else

                free(params->text);

#endif

        if (params->irr != NULL)

#ifdef _KERNEL

                kmem_free(params->irr, strlen(params->irr) + 1);

#else

                free(params->irr);

#endif

        if (params->curvea != NULL)

#ifdef _KERNEL

                kmem_free(params->curvea, strlen(params->curvea) + 1);

#else

                free(params->curvea);

#endif

        if (params->curveb != NULL)

#ifdef _KERNEL

                kmem_free(params->curveb, strlen(params->curveb) + 1);

#else

                free(params->curveb);

#endif

        if (params->genx != NULL)

#ifdef _KERNEL

                kmem_free(params->genx, strlen(params->genx) + 1);

#else

                free(params->genx);

#endif

        if (params->geny != NULL)

#ifdef _KERNEL

                kmem_free(params->geny, strlen(params->geny) + 1);

#else

                free(params->geny);

#endif

        if (params->order != NULL)

#ifdef _KERNEL

                kmem_free(params->order, strlen(params->order) + 1);

#else

                free(params->order);

#endif

#ifdef _KERNEL

        kmem_free(params, sizeof(ECCurveParams));

#else

        free(params);

#endif

}