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1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2  * All rights reserved.
3  *
4  * This package is an SSL implementation written
5  * by Eric Young (eay@cryptsoft.com).
6  * The implementation was written so as to conform with Netscapes SSL.
7  *
8  * This library is free for commercial and non-commercial use as long as
9  * the following conditions are aheared to.  The following conditions
10  * apply to all code found in this distribution, be it the RC4, RSA,
11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
12  * included with this distribution is covered by the same copyright terms
13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14  *
15  * Copyright remains Eric Young's, and as such any Copyright notices in
16  * the code are not to be removed.
17  * If this package is used in a product, Eric Young should be given attribution
18  * as the author of the parts of the library used.
19  * This can be in the form of a textual message at program startup or
20  * in documentation (online or textual) provided with the package.
21  *
22  * Redistribution and use in source and binary forms, with or without
23  * modification, are permitted provided that the following conditions
24  * are met:
25  * 1. Redistributions of source code must retain the copyright
26  *    notice, this list of conditions and the following disclaimer.
27  * 2. Redistributions in binary form must reproduce the above copyright
28  *    notice, this list of conditions and the following disclaimer in the
29  *    documentation and/or other materials provided with the distribution.
30  * 3. All advertising materials mentioning features or use of this software
31  *    must display the following acknowledgement:
32  *    "This product includes cryptographic software written by
33  *     Eric Young (eay@cryptsoft.com)"
34  *    The word 'cryptographic' can be left out if the rouines from the library
35  *    being used are not cryptographic related :-).
36  * 4. If you include any Windows specific code (or a derivative thereof) from
37  *    the apps directory (application code) you must include an acknowledgement:
38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39  *
40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50  * SUCH DAMAGE.
51  *
52  * The licence and distribution terms for any publically available version or
53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
54  * copied and put under another distribution licence
55  * [including the GNU Public Licence.] */
56 
57 #include <openssl/asn1.h>
58 
59 #include <openssl/err.h>
60 #include <openssl/mem.h>
61 
62 /* ASN1_ITEM versions of the above */
63 
ASN1_item_pack(void * obj,const ASN1_ITEM * it,ASN1_STRING ** oct)64 ASN1_STRING *ASN1_item_pack(void *obj, const ASN1_ITEM *it, ASN1_STRING **oct)
65 {
66     ASN1_STRING *octmp;
67 
68     if (!oct || !*oct) {
69         if (!(octmp = ASN1_STRING_new())) {
70             OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
71             return NULL;
72         }
73         if (oct)
74             *oct = octmp;
75     } else
76         octmp = *oct;
77 
78     if (octmp->data) {
79         OPENSSL_free(octmp->data);
80         octmp->data = NULL;
81     }
82 
83     if (!(octmp->length = ASN1_item_i2d(obj, &octmp->data, it))) {
84         OPENSSL_PUT_ERROR(ASN1, ASN1_R_ENCODE_ERROR);
85         return NULL;
86     }
87     if (!octmp->data) {
88         OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
89         return NULL;
90     }
91     return octmp;
92 }
93 
94 /* Extract an ASN1 object from an ASN1_STRING */
95 
ASN1_item_unpack(ASN1_STRING * oct,const ASN1_ITEM * it)96 void *ASN1_item_unpack(ASN1_STRING *oct, const ASN1_ITEM *it)
97 {
98     const unsigned char *p;
99     void *ret;
100 
101     p = oct->data;
102     if (!(ret = ASN1_item_d2i(NULL, &p, oct->length, it)))
103         OPENSSL_PUT_ERROR(ASN1, ASN1_R_DECODE_ERROR);
104     return ret;
105 }
106