a_dup.c revision 225736 
1211679Simp/* crypto/asn1/a_dup.c */
2211679Simp/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3223539Smarius * All rights reserved.
4223539Smarius *
5223539Smarius * This package is an SSL implementation written
6223539Smarius * by Eric Young (eay@cryptsoft.com).
7271130Semaste * The implementation was written so as to conform with Netscapes SSL.
8211679Simp *
9211679Simp * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to.  The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 *    notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 *    notice, this list of conditions and the following disclaimer in the
30 *    documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 *    must display the following acknowledgement:
33 *    "This product includes cryptographic software written by
34 *     Eric Young (eay@cryptsoft.com)"
35 *    The word 'cryptographic' can be left out if the rouines from the library
36 *    being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 *    the apps directory (application code) you must include an acknowledgement:
39 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60#include "cryptlib.h"
61#include <openssl/asn1.h>
62
63#ifndef NO_OLD_ASN1
64
65void *ASN1_dup(i2d_of_void *i2d, d2i_of_void *d2i, char *x)
66	{
67	unsigned char *b,*p;
68	const unsigned char *p2;
69	int i;
70	char *ret;
71
72	if (x == NULL) return(NULL);
73
74	i=i2d(x,NULL);
75	b=OPENSSL_malloc(i+10);
76	if (b == NULL)
77		{ ASN1err(ASN1_F_ASN1_DUP,ERR_R_MALLOC_FAILURE); return(NULL); }
78	p= b;
79	i=i2d(x,&p);
80	p2= b;
81	ret=d2i(NULL,&p2,i);
82	OPENSSL_free(b);
83	return(ret);
84	}
85
86#endif
87
88/* ASN1_ITEM version of dup: this follows the model above except we don't need
89 * to allocate the buffer. At some point this could be rewritten to directly dup
90 * the underlying structure instead of doing and encode and decode.
91 */
92
93void *ASN1_item_dup(const ASN1_ITEM *it, void *x)
94	{
95	unsigned char *b = NULL;
96	const unsigned char *p;
97	long i;
98	void *ret;
99
100	if (x == NULL) return(NULL);
101
102	i=ASN1_item_i2d(x,&b,it);
103	if (b == NULL)
104		{ ASN1err(ASN1_F_ASN1_ITEM_DUP,ERR_R_MALLOC_FAILURE); return(NULL); }
105	p= b;
106	ret=ASN1_item_d2i(NULL,&p,i, it);
107	OPENSSL_free(b);
108	return(ret);
109	}
110