1 /*
2 * Copyright 1999-2023 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
ASN1_item_pack(void * obj,const ASN1_ITEM * it,ASN1_STRING ** oct)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 ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
23 return NULL;
24 }
25 } else {
26 octmp = *oct;
27 }
28
29 ASN1_STRING_set0(octmp, NULL, 0);
30
31 if ((octmp->length = ASN1_item_i2d(obj, &octmp->data, it)) <= 0) {
32 ERR_raise(ERR_LIB_ASN1, ASN1_R_ENCODE_ERROR);
33 goto err;
34 }
35 if (octmp->data == NULL) {
36 ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
37 goto err;
38 }
39
40 if (oct != NULL && *oct == NULL)
41 *oct = octmp;
42
43 return octmp;
44 err:
45 if (oct == NULL || *oct == NULL)
46 ASN1_STRING_free(octmp);
47 return NULL;
48 }
49
50 /* Extract an ASN1 object from an ASN1_STRING */
51
ASN1_item_unpack(const ASN1_STRING * oct,const ASN1_ITEM * it)52 void *ASN1_item_unpack(const ASN1_STRING *oct, const ASN1_ITEM *it)
53 {
54 const unsigned char *p;
55 void *ret;
56
57 p = oct->data;
58 if ((ret = ASN1_item_d2i(NULL, &p, oct->length, it)) == NULL)
59 ERR_raise(ERR_LIB_ASN1, ASN1_R_DECODE_ERROR);
60 return ret;
61 }
62
ASN1_item_unpack_ex(const ASN1_STRING * oct,const ASN1_ITEM * it,OSSL_LIB_CTX * libctx,const char * propq)63 void *ASN1_item_unpack_ex(const ASN1_STRING *oct, const ASN1_ITEM *it,
64 OSSL_LIB_CTX *libctx, const char *propq)
65 {
66 const unsigned char *p;
67 void *ret;
68
69 p = oct->data;
70 if ((ret = ASN1_item_d2i_ex(NULL, &p, oct->length, it,\
71 libctx, propq)) == NULL)
72 ERR_raise(ERR_LIB_ASN1, ASN1_R_DECODE_ERROR);
73 return ret;
74 }
75
