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 | |
16 | ASN1_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 | |
53 | void *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 | |