1/*
2 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <stdio.h>
11#include "internal/cryptlib.h"
12#include <openssl/asn1.h>
13
14#ifndef NO_OLD_ASN1
15
16void *ASN1_dup(i2d_of_void *i2d, d2i_of_void *d2i, const void *x)
17{
18 unsigned char *b, *p;
19 const unsigned char *p2;
20 int i;
21 char *ret;
22
23 if (x == NULL)
24 return NULL;
25
26 i = i2d(x, NULL);
27 b = OPENSSL_malloc(i + 10);
28 if (b == NULL) {
29 ASN1err(ASN1_F_ASN1_DUP, ERR_R_MALLOC_FAILURE);
30 return NULL;
31 }
32 p = b;
33 i = i2d(x, &p);
34 p2 = b;
35 ret = d2i(NULL, &p2, i);
36 OPENSSL_free(b);
37 return ret;
38}
39
40#endif
41
42/*
43 * ASN1_ITEM version of dup: this follows the model above except we don't
44 * need to allocate the buffer. At some point this could be rewritten to
45 * directly dup the underlying structure instead of doing and encode and
46 * decode.
47 */
48
49void *ASN1_item_dup(const ASN1_ITEM *it, const void *x)
50{
51 unsigned char *b = NULL;
52 const unsigned char *p;
53 long i;
54 void *ret;
55
56 if (x == NULL)
57 return NULL;
58
59 i = ASN1_item_i2d(x, &b, it);
60 if (b == NULL) {
61 ASN1err(ASN1_F_ASN1_ITEM_DUP, ERR_R_MALLOC_FAILURE);
62 return NULL;
63 }
64 p = b;
65 ret = ASN1_item_d2i(NULL, &p, i, it);
66 OPENSSL_free(b);
67 return ret;
68}
69