jdk/src/share/native/sun/security/ec/impl/ecl_curve.c
author vinnie
Mon, 30 May 2011 16:37:42 +0100
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permissions -rw-r--r--
7049173: Replace the software license for ECC native code Reviewed-by: alanb
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/*
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 * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
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 * Use is subject to license terms.
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public License
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 * along with this library; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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/* *********************************************************************
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 *
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 * The Original Code is the elliptic curve math library.
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 *
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 * The Initial Developer of the Original Code is
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 * Sun Microsystems, Inc.
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 * Portions created by the Initial Developer are Copyright (C) 2003
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 * the Initial Developer. All Rights Reserved.
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 *
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 * Contributor(s):
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 *   Douglas Stebila <douglas@stebila.ca>, Sun Microsystems Laboratories
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 *
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 *********************************************************************** */
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#include "ecl.h"
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#include "ecl-curve.h"
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#include "ecl-priv.h"
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#ifndef _KERNEL
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#include <stdlib.h>
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#include <string.h>
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#endif
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#define CHECK(func) if ((func) == NULL) { res = 0; goto CLEANUP; }
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/* Duplicates an ECCurveParams */
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ECCurveParams *
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ECCurveParams_dup(const ECCurveParams * params, int kmflag)
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{
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        int res = 1;
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        ECCurveParams *ret = NULL;
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#ifdef _KERNEL
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        ret = (ECCurveParams *) kmem_zalloc(sizeof(ECCurveParams), kmflag);
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#else
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        CHECK(ret = (ECCurveParams *) calloc(1, sizeof(ECCurveParams)));
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#endif
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        if (params->text != NULL) {
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#ifdef _KERNEL
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                ret->text = kmem_alloc(strlen(params->text) + 1, kmflag);
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                bcopy(params->text, ret->text, strlen(params->text) + 1);
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#else
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                CHECK(ret->text = strdup(params->text));
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#endif
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        }
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        ret->field = params->field;
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        ret->size = params->size;
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        if (params->irr != NULL) {
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#ifdef _KERNEL
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                ret->irr = kmem_alloc(strlen(params->irr) + 1, kmflag);
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                bcopy(params->irr, ret->irr, strlen(params->irr) + 1);
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#else
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                CHECK(ret->irr = strdup(params->irr));
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#endif
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        }
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        if (params->curvea != NULL) {
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#ifdef _KERNEL
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                ret->curvea = kmem_alloc(strlen(params->curvea) + 1, kmflag);
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                bcopy(params->curvea, ret->curvea, strlen(params->curvea) + 1);
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#else
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                CHECK(ret->curvea = strdup(params->curvea));
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#endif
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        }
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        if (params->curveb != NULL) {
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#ifdef _KERNEL
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                ret->curveb = kmem_alloc(strlen(params->curveb) + 1, kmflag);
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                bcopy(params->curveb, ret->curveb, strlen(params->curveb) + 1);
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#else
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                CHECK(ret->curveb = strdup(params->curveb));
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#endif
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        }
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        if (params->genx != NULL) {
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#ifdef _KERNEL
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                ret->genx = kmem_alloc(strlen(params->genx) + 1, kmflag);
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                bcopy(params->genx, ret->genx, strlen(params->genx) + 1);
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#else
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                CHECK(ret->genx = strdup(params->genx));
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#endif
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        }
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        if (params->geny != NULL) {
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#ifdef _KERNEL
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                ret->geny = kmem_alloc(strlen(params->geny) + 1, kmflag);
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                bcopy(params->geny, ret->geny, strlen(params->geny) + 1);
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#else
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                CHECK(ret->geny = strdup(params->geny));
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#endif
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        }
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        if (params->order != NULL) {
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#ifdef _KERNEL
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                ret->order = kmem_alloc(strlen(params->order) + 1, kmflag);
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                bcopy(params->order, ret->order, strlen(params->order) + 1);
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#else
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                CHECK(ret->order = strdup(params->order));
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#endif
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        }
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        ret->cofactor = params->cofactor;
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  CLEANUP:
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        if (res != 1) {
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                EC_FreeCurveParams(ret);
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                return NULL;
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        }
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        return ret;
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}
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#undef CHECK
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/* Construct ECCurveParams from an ECCurveName */
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ECCurveParams *
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EC_GetNamedCurveParams(const ECCurveName name, int kmflag)
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{
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        if ((name <= ECCurve_noName) || (ECCurve_pastLastCurve <= name) ||
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                                        (ecCurve_map[name] == NULL)) {
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                return NULL;
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        } else {
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                return ECCurveParams_dup(ecCurve_map[name], kmflag);
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        }
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}
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/* Free the memory allocated (if any) to an ECCurveParams object. */
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void
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EC_FreeCurveParams(ECCurveParams * params)
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{
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        if (params == NULL)
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                return;
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        if (params->text != NULL)
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#ifdef _KERNEL
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                kmem_free(params->text, strlen(params->text) + 1);
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#else
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                free(params->text);
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#endif
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        if (params->irr != NULL)
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#ifdef _KERNEL
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                kmem_free(params->irr, strlen(params->irr) + 1);
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#else
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                free(params->irr);
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#endif
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        if (params->curvea != NULL)
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#ifdef _KERNEL
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                kmem_free(params->curvea, strlen(params->curvea) + 1);
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#else
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                free(params->curvea);
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#endif
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        if (params->curveb != NULL)
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#ifdef _KERNEL
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                kmem_free(params->curveb, strlen(params->curveb) + 1);
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#else
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                free(params->curveb);
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#endif
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        if (params->genx != NULL)
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#ifdef _KERNEL
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                kmem_free(params->genx, strlen(params->genx) + 1);
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#else
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                free(params->genx);
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#endif
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        if (params->geny != NULL)
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#ifdef _KERNEL
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                kmem_free(params->geny, strlen(params->geny) + 1);
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#else
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                free(params->geny);
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#endif
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        if (params->order != NULL)
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#ifdef _KERNEL
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                kmem_free(params->order, strlen(params->order) + 1);
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#else
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                free(params->order);
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#endif
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#ifdef _KERNEL
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        kmem_free(params, sizeof(ECCurveParams));
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#else
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        free(params);
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#endif
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}