usr/src/common/crypto/ecc/secitem.c

   1 /* ***** BEGIN LICENSE BLOCK *****
   2  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   3  *
   4  * The contents of this file are subject to the Mozilla Public License Version
   5  * 1.1 (the "License"); you may not use this file except in compliance with
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   9  * Software distributed under the License is distributed on an "AS IS" basis,
  10  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  11  * for the specific language governing rights and limitations under the
  12  * License.
  13  *
  14  * The Original Code is the Netscape security libraries.
  15  *
  16  * The Initial Developer of the Original Code is
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  18  * Portions created by the Initial Developer are Copyright (C) 1994-2000
  19  * the Initial Developer. All Rights Reserved.
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  21  * Contributor(s):
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  23  * Alternatively, the contents of this file may be used under the terms of
  24  * either the GNU General Public License Version 2 or later (the "GPL"), or
  25  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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  35  * ***** END LICENSE BLOCK ***** */
  36 /*
  37  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  38  * Use is subject to license terms.
  39  *
  40  * Sun elects to use this software under the MPL license.
  41  */
  42
  43 #pragma ident   "%Z%%M% %I%     %E% SMI"
  44
  45 /*
  46  * Support routines for SECItem data structure.
  47  *
  48  * $Id: secitem.c,v 1.14 2006/05/22 22:24:34 wtchang%redhat.com Exp $
  49  */
  50
  51 #include <sys/types.h>
  52 #include <sys/systm.h>
  53 #include <sys/param.h>
  54 #ifdef _KERNEL
  55 #include <sys/kmem.h>
  56 #else
  57 #include <string.h>
  58 #include <strings.h>
  59 #include <assert.h>
  60 #endif
  61 #include "ec.h"
  62 #include "ecl-curve.h"
  63 #include "ecc_impl.h"
  64
  65 void SECITEM_FreeItem(SECItem *, PRBool);
  66
  67 SECItem *
  68 SECITEM_AllocItem(PRArenaPool *arena, SECItem *item, unsigned int len,
  69     int kmflag)
  70 {
  71     SECItem *result = NULL;
  72     void *mark = NULL;
  73
  74     if (arena != NULL) {
  75         mark = PORT_ArenaMark(arena);
  76     }
  77
  78     if (item == NULL) {
  79         if (arena != NULL) {
  80             result = PORT_ArenaZAlloc(arena, sizeof(SECItem), kmflag);
  81         } else {
  82             result = PORT_ZAlloc(sizeof(SECItem), kmflag);
  83         }
  84         if (result == NULL) {
  85             goto loser;
  86         }
  87     } else {
  88         PORT_Assert(item->data == NULL);
  89         result = item;
  90     }
  91
  92     result->len = len;
  93     if (len) {
  94         if (arena != NULL) {
  95             result->data = PORT_ArenaAlloc(arena, len, kmflag);
  96         } else {
  97             result->data = PORT_Alloc(len, kmflag);
  98         }
  99         if (result->data == NULL) {
 100             goto loser;
 101         }
 102     } else {
 103         result->data = NULL;
 104     }
 105
 106     if (mark) {
 107         PORT_ArenaUnmark(arena, mark);
 108     }
 109     return(result);
 110
 111 loser:
 112     if ( arena != NULL ) {
 113         if (mark) {
 114             PORT_ArenaRelease(arena, mark);
 115         }
 116         if (item != NULL) {
 117             item->data = NULL;
 118             item->len = 0;
 119         }
 120     } else {
 121         if (result != NULL) {
 122             SECITEM_FreeItem(result, (item == NULL) ? PR_TRUE : PR_FALSE);
 123         }
 124         /*
 125          * If item is not NULL, the above has set item->data and
 126          * item->len to 0.
 127          */
 128     }
 129     return(NULL);
 130 }
 131
 132 SECStatus
 133 SECITEM_CopyItem(PRArenaPool *arena, SECItem *to, const SECItem *from,
 134    int kmflag)
 135 {
 136     to->type = from->type;
 137     if (from->data && from->len) {
 138         if ( arena ) {
 139             to->data = (unsigned char*) PORT_ArenaAlloc(arena, from->len,
 140                 kmflag);
 141         } else {
 142             to->data = (unsigned char*) PORT_Alloc(from->len, kmflag);
 143         }
 144
 145         if (!to->data) {
 146             return SECFailure;
 147         }
 148         PORT_Memcpy(to->data, from->data, from->len);
 149         to->len = from->len;
 150     } else {
 151         to->data = 0;
 152         to->len = 0;
 153     }
 154     return SECSuccess;
 155 }
 156
 157 void
 158 SECITEM_FreeItem(SECItem *zap, PRBool freeit)
 159 {
 160     if (zap) {
 161 #ifdef _KERNEL
 162         kmem_free(zap->data, zap->len);
 163 #else
 164         free(zap->data);
 165 #endif
 166         zap->data = 0;
 167         zap->len = 0;
 168         if (freeit) {
 169 #ifdef _KERNEL
 170             kmem_free(zap, sizeof (SECItem));
 171 #else
 172             free(zap);
 173 #endif
 174         }
 175     }
 176 }