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

 *

 * 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 Netscape security libraries.

 *

 * The Initial Developer of the Original Code is

 * Netscape Communications Corporation.

 * Portions created by the Initial Developer are Copyright (C) 1994-2000

 * the Initial Developer. All Rights Reserved.

 *

 * Contributor(s):

 *

 * 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.

 */

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

/*

 * Support routines for SECItem data structure.

 *

 * $Id: secitem.c,v 1.14 2006/05/22 22:24:34 wtchang%redhat.com Exp $

 */

#include <sys/types.h>

#ifndef _WIN32

#ifndef __linux__

#include <sys/systm.h>

#endif /* __linux__ */

#include <sys/param.h>

#endif /* _WIN32 */

#ifdef _KERNEL

#include <sys/kmem.h>

#else

#include <string.h>

#ifndef _WIN32

#include <strings.h>

#endif /* _WIN32 */

#include <assert.h>

#endif

#include "ec.h"

#include "ecl-curve.h"

#include "ecc_impl.h"

void SECITEM_FreeItem(SECItem *, PRBool);

SECItem *

SECITEM_AllocItem(PRArenaPool *arena, SECItem *item, unsigned int len,

    int kmflag)

{

    SECItem *result = NULL;

    void *mark = NULL;

    if (arena != NULL) {

        mark = PORT_ArenaMark(arena);

    }

    if (item == NULL) {

        if (arena != NULL) {

            result = PORT_ArenaZAlloc(arena, sizeof(SECItem), kmflag);

        } else {

            result = PORT_ZAlloc(sizeof(SECItem), kmflag);

        }

        if (result == NULL) {

            goto loser;

        }

    } else {

        PORT_Assert(item->data == NULL);

        result = item;

    }

    result->len = len;

    if (len) {

        if (arena != NULL) {

            result->data = PORT_ArenaAlloc(arena, len, kmflag);

        } else {

            result->data = PORT_Alloc(len, kmflag);

        }

        if (result->data == NULL) {

            goto loser;

        }

    } else {

        result->data = NULL;

    }

    if (mark) {

        PORT_ArenaUnmark(arena, mark);

    }

    return(result);

loser:

    if ( arena != NULL ) {

        if (mark) {

            PORT_ArenaRelease(arena, mark);

        }

        if (item != NULL) {

            item->data = NULL;

            item->len = 0;

        }

    } else {

        if (result != NULL) {

            SECITEM_FreeItem(result, (item == NULL) ? PR_TRUE : PR_FALSE);

        }

        /*

         * If item is not NULL, the above has set item->data and

         * item->len to 0.

         */

    }

    return(NULL);

}

SECStatus

SECITEM_CopyItem(PRArenaPool *arena, SECItem *to, const SECItem *from,

   int kmflag)

{

    to->type = from->type;

    if (from->data && from->len) {

        if ( arena ) {

            to->data = (unsigned char*) PORT_ArenaAlloc(arena, from->len,

                kmflag);

        } else {

            to->data = (unsigned char*) PORT_Alloc(from->len, kmflag);

        }

        if (!to->data) {

            return SECFailure;

        }

        PORT_Memcpy(to->data, from->data, from->len);

        to->len = from->len;

    } else {

        to->data = 0;

        to->len = 0;

    }

    return SECSuccess;

}

void

SECITEM_FreeItem(SECItem *zap, PRBool freeit)

{

    if (zap) {

#ifdef _KERNEL

        kmem_free(zap->data, zap->len);

#else

        free(zap->data);

#endif

        zap->data = 0;

        zap->len = 0;

        if (freeit) {

#ifdef _KERNEL

            kmem_free(zap, sizeof (SECItem));

#else

            free(zap);

#endif

        }

    }

}