1/*
2 * Copyright (c) 2007, 2012, Oracle and/or its affiliates. All rights reserved.
3 * Use is subject to license terms.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2.1 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public License
16 * along with this library; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/* *********************************************************************
25 *
26 * The Original Code is the Netscape security libraries.
27 *
28 * The Initial Developer of the Original Code is
29 * Netscape Communications Corporation.
30 * Portions created by the Initial Developer are Copyright (C) 1994-2000
31 * the Initial Developer. All Rights Reserved.
32 *
33 * Contributor(s):
34 *
35 * Last Modified Date from the Original Code: March 2012
36 *********************************************************************** */
37
38/*
39 * Support routines for SECItem data structure.
40 *
41 * $Id: secitem.c,v 1.14 2006/05/22 22:24:34 wtchang%redhat.com Exp $
42 */
43
44#include <sys/types.h>
45
46#ifndef _WIN32
47#if !defined(__linux__) && !defined(_ALLBSD_SOURCE)
48#include <sys/systm.h>
49#endif /* __linux__ || _ALLBSD_SOURCE */
50#include <sys/param.h>
51#endif /* _WIN32 */
52
53#ifdef _KERNEL
54#include <sys/kmem.h>
55#else
56#include <string.h>
57
58#ifndef _WIN32
59#include <strings.h>
60#endif /* _WIN32 */
61
62#include <assert.h>
63#endif
64#include "ec.h"
65#include "ecl-curve.h"
66#include "ecc_impl.h"
67
68void SECITEM_FreeItem(SECItem *, PRBool);
69
70SECItem *
71SECITEM_AllocItem(PRArenaPool *arena, SECItem *item, unsigned int len,
72 int kmflag)
73{
74 SECItem *result = NULL;
75 void *mark = NULL;
76
77 if (arena != NULL) {
78 mark = PORT_ArenaMark(arena);
79 }
80
81 if (item == NULL) {
82 if (arena != NULL) {
83 result = PORT_ArenaZAlloc(arena, sizeof(SECItem), kmflag);
84 } else {
85 result = PORT_ZAlloc(sizeof(SECItem), kmflag);
86 }
87 if (result == NULL) {
88 goto loser;
89 }
90 } else {
91 PORT_Assert(item->data == NULL);
92 result = item;
93 }
94
95 result->len = len;
96 if (len) {
97 if (arena != NULL) {
98 result->data = PORT_ArenaAlloc(arena, len, kmflag);
99 } else {
100 result->data = PORT_Alloc(len, kmflag);
101 }
102 if (result->data == NULL) {
103 goto loser;
104 }
105 } else {
106 result->data = NULL;
107 }
108
109 if (mark) {
110 PORT_ArenaUnmark(arena, mark);
111 }
112 return(result);
113
114loser:
115 if ( arena != NULL ) {
116 if (mark) {
117 PORT_ArenaRelease(arena, mark);
118 }
119 if (item != NULL) {
120 item->data = NULL;
121 item->len = 0;
122 }
123 } else {
124 if (result != NULL) {
125 SECITEM_FreeItem(result, (item == NULL) ? PR_TRUE : PR_FALSE);
126 }
127 /*
128 * If item is not NULL, the above has set item->data and
129 * item->len to 0.
130 */
131 }
132 return(NULL);
133}
134
135SECStatus
136SECITEM_CopyItem(PRArenaPool *arena, SECItem *to, const SECItem *from,
137 int kmflag)
138{
139 to->type = from->type;
140 if (from->data && from->len) {
141 if ( arena ) {
142 to->data = (unsigned char*) PORT_ArenaAlloc(arena, from->len,
143 kmflag);
144 } else {
145 to->data = (unsigned char*) PORT_Alloc(from->len, kmflag);
146 }
147
148 if (!to->data) {
149 return SECFailure;
150 }
151 PORT_Memcpy(to->data, from->data, from->len);
152 to->len = from->len;
153 } else {
154 to->data = 0;
155 to->len = 0;
156 }
157 return SECSuccess;
158}
159
160void
161SECITEM_FreeItem(SECItem *zap, PRBool freeit)
162{
163 if (zap) {
164#ifdef _KERNEL
165 kmem_free(zap->data, zap->len);
166#else
167 free(zap->data);
168#endif
169 zap->data = 0;
170 zap->len = 0;
171 if (freeit) {
172#ifdef _KERNEL
173 kmem_free(zap, sizeof (SECItem));
174#else
175 free(zap);
176#endif
177 }
178 }
179}
180