1 /* asn_pack.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 1999.
4 */
5 /* ====================================================================
6 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59 #include <stdio.h>
60 #include "cryptlib.h"
61 #include <openssl/asn1.h>
62
63 #ifndef NO_ASN1_OLD
64
65 /* ASN1 packing and unpacking functions */
66
67 /* Turn an ASN1 encoded SEQUENCE OF into a STACK of structures */
68
69 STACK_OF(OPENSSL_BLOCK) *ASN1_seq_unpack(const unsigned char *buf, int len,
70 d2i_of_void *d2i, void (*free_func)(OPENSSL_BLOCK))
71 {
72 STACK_OF(OPENSSL_BLOCK) *sk;
73 const unsigned char *pbuf;
74 pbuf = buf;
75 if (!(sk = d2i_ASN1_SET(NULL, &pbuf, len, d2i, free_func,
76 V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL)))
77 ASN1err(ASN1_F_ASN1_SEQ_UNPACK,ASN1_R_DECODE_ERROR);
78 return sk;
79 }
80
81 /* Turn a STACK structures into an ASN1 encoded SEQUENCE OF structure in a
82 * OPENSSL_malloc'ed buffer
83 */
84
85 unsigned char *ASN1_seq_pack(STACK_OF(OPENSSL_BLOCK) *safes, i2d_of_void *i2d,
86 unsigned char **buf, int *len)
87 {
88 int safelen;
89 unsigned char *safe, *p;
90 if (!(safelen = i2d_ASN1_SET(safes, NULL, i2d, V_ASN1_SEQUENCE,
91 V_ASN1_UNIVERSAL, IS_SEQUENCE))) {
92 ASN1err(ASN1_F_ASN1_SEQ_PACK,ASN1_R_ENCODE_ERROR);
93 return NULL;
94 }
95 if (!(safe = OPENSSL_malloc (safelen))) {
96 ASN1err(ASN1_F_ASN1_SEQ_PACK,ERR_R_MALLOC_FAILURE);
97 return NULL;
98 }
99 p = safe;
100 i2d_ASN1_SET(safes, &p, i2d, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL,
101 IS_SEQUENCE);
102 if (len) *len = safelen;
103 if (buf) *buf = safe;
104 return safe;
105 }
106
107 /* Extract an ASN1 object from an ASN1_STRING */
108
109 void *ASN1_unpack_string(ASN1_STRING *oct, d2i_of_void *d2i)
110 {
111 const unsigned char *p;
112 char *ret;
113
114 p = oct->data;
115 if(!(ret = d2i(NULL, &p, oct->length)))
116 ASN1err(ASN1_F_ASN1_UNPACK_STRING,ASN1_R_DECODE_ERROR);
117 return ret;
118 }
119
120 /* Pack an ASN1 object into an ASN1_STRING */
121
122 ASN1_STRING *ASN1_pack_string(void *obj, i2d_of_void *i2d, ASN1_STRING **oct)
123 {
124 unsigned char *p;
125 ASN1_STRING *octmp;
126
127 if (!oct || !*oct) {
128 if (!(octmp = ASN1_STRING_new ())) {
129 ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE);
130 return NULL;
131 }
132 if (oct) *oct = octmp;
133 } else octmp = *oct;
134
135 if (!(octmp->length = i2d(obj, NULL))) {
136 ASN1err(ASN1_F_ASN1_PACK_STRING,ASN1_R_ENCODE_ERROR);
137 goto err;
138 }
139 if (!(p = OPENSSL_malloc (octmp->length))) {
140 ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE);
141 goto err;
142 }
143 octmp->data = p;
144 i2d (obj, &p);
145 return octmp;
146 err:
147 if (!oct || !*oct)
148 {
149 ASN1_STRING_free(octmp);
150 if (oct)
151 *oct = NULL;
152 }
153 return NULL;
154 }
155
156 #endif
157
158 /* ASN1_ITEM versions of the above */
159
160 ASN1_STRING *ASN1_item_pack(void *obj, const ASN1_ITEM *it, ASN1_STRING **oct)
161 {
162 ASN1_STRING *octmp;
163
164 if (!oct || !*oct) {
165 if (!(octmp = ASN1_STRING_new ())) {
166 ASN1err(ASN1_F_ASN1_ITEM_PACK,ERR_R_MALLOC_FAILURE);
167 return NULL;
168 }
169 if (oct) *oct = octmp;
170 } else octmp = *oct;
171
172 if(octmp->data) {
173 OPENSSL_free(octmp->data);
174 octmp->data = NULL;
175 }
176
177 if (!(octmp->length = ASN1_item_i2d(obj, &octmp->data, it))) {
178 ASN1err(ASN1_F_ASN1_ITEM_PACK,ASN1_R_ENCODE_ERROR);
179 return NULL;
180 }
181 if (!octmp->data) {
182 ASN1err(ASN1_F_ASN1_ITEM_PACK,ERR_R_MALLOC_FAILURE);
183 return NULL;
184 }
185 return octmp;
186 }
187
188 /* Extract an ASN1 object from an ASN1_STRING */
189
190 void *ASN1_item_unpack(ASN1_STRING *oct, const ASN1_ITEM *it)
191 {
192 const unsigned char *p;
193 void *ret;
194
195 p = oct->data;
196 if(!(ret = ASN1_item_d2i(NULL, &p, oct->length, it)))
197 ASN1err(ASN1_F_ASN1_ITEM_UNPACK,ASN1_R_DECODE_ERROR);
198 return ret;
199 }