1/*
2 * Copyright 1999-2016 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/* ASN1 packing and unpacking functions */
15
16ASN1_STRING *ASN1_item_pack(void *obj, const ASN1_ITEM *it, ASN1_STRING **oct)
17{
18 ASN1_STRING *octmp;
19
20 if (oct == NULL || *oct == NULL) {
21 if ((octmp = ASN1_STRING_new()) == NULL) {
22 ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE);
23 return NULL;
24 }
25 } else {
26 octmp = *oct;
27 }
28
29 OPENSSL_free(octmp->data);
30 octmp->data = NULL;
31
32 if ((octmp->length = ASN1_item_i2d(obj, &octmp->data, it)) == 0) {
33 ASN1err(ASN1_F_ASN1_ITEM_PACK, ASN1_R_ENCODE_ERROR);
34 goto err;
35 }
36 if (octmp->data == NULL) {
37 ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE);
38 goto err;
39 }
40
41 if (oct != NULL && *oct == NULL)
42 *oct = octmp;
43
44 return octmp;
45 err:
46 if (oct == NULL || *oct == NULL)
47 ASN1_STRING_free(octmp);
48 return NULL;
49}
50
51/* Extract an ASN1 object from an ASN1_STRING */
52
53void *ASN1_item_unpack(const ASN1_STRING *oct, const ASN1_ITEM *it)
54{
55 const unsigned char *p;
56 void *ret;
57
58 p = oct->data;
59 if ((ret = ASN1_item_d2i(NULL, &p, oct->length, it)) == NULL)
60 ASN1err(ASN1_F_ASN1_ITEM_UNPACK, ASN1_R_DECODE_ERROR);
61 return ret;
62}
63