Line data Source code
1 : /* asn_pack.c */
2 : /*
3 : * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 : * 1999.
5 : */
6 : /* ====================================================================
7 : * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
8 : *
9 : * Redistribution and use in source and binary forms, with or without
10 : * modification, are permitted provided that the following conditions
11 : * are met:
12 : *
13 : * 1. Redistributions of source code must retain the above copyright
14 : * notice, this list of conditions and the following disclaimer.
15 : *
16 : * 2. Redistributions in binary form must reproduce the above copyright
17 : * notice, this list of conditions and the following disclaimer in
18 : * the documentation and/or other materials provided with the
19 : * distribution.
20 : *
21 : * 3. All advertising materials mentioning features or use of this
22 : * software must display the following acknowledgment:
23 : * "This product includes software developed by the OpenSSL Project
24 : * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 : *
26 : * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 : * endorse or promote products derived from this software without
28 : * prior written permission. For written permission, please contact
29 : * licensing@OpenSSL.org.
30 : *
31 : * 5. Products derived from this software may not be called "OpenSSL"
32 : * nor may "OpenSSL" appear in their names without prior written
33 : * permission of the OpenSSL Project.
34 : *
35 : * 6. Redistributions of any form whatsoever must retain the following
36 : * acknowledgment:
37 : * "This product includes software developed by the OpenSSL Project
38 : * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 : *
40 : * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 : * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 : * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 : * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 : * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 : * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 : * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 : * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 : * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 : * OF THE POSSIBILITY OF SUCH DAMAGE.
52 : * ====================================================================
53 : *
54 : * This product includes cryptographic software written by Eric Young
55 : * (eay@cryptsoft.com). This product includes software written by Tim
56 : * Hudson (tjh@cryptsoft.com).
57 : *
58 : */
59 :
60 : #include <stdio.h>
61 : #include "cryptlib.h"
62 : #include <openssl/asn1.h>
63 :
64 : #ifndef NO_ASN1_OLD
65 :
66 : /* ASN1 packing and unpacking functions */
67 :
68 : /* Turn an ASN1 encoded SEQUENCE OF into a STACK of structures */
69 :
70 0 : STACK_OF(OPENSSL_BLOCK) *ASN1_seq_unpack(const unsigned char *buf, int len,
71 : d2i_of_void *d2i,
72 : void (*free_func) (OPENSSL_BLOCK))
73 : {
74 : STACK_OF(OPENSSL_BLOCK) *sk;
75 : const unsigned char *pbuf;
76 0 : pbuf = buf;
77 0 : if (!(sk = d2i_ASN1_SET(NULL, &pbuf, len, d2i, free_func,
78 : V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL)))
79 0 : ASN1err(ASN1_F_ASN1_SEQ_UNPACK, ASN1_R_DECODE_ERROR);
80 0 : return sk;
81 : }
82 :
83 : /*
84 : * Turn a STACK structures into an ASN1 encoded SEQUENCE OF structure in a
85 : * OPENSSL_malloc'ed buffer
86 : */
87 :
88 0 : unsigned char *ASN1_seq_pack(STACK_OF(OPENSSL_BLOCK) *safes, i2d_of_void *i2d,
89 : unsigned char **buf, int *len)
90 : {
91 : int safelen;
92 : unsigned char *safe, *p;
93 0 : if (!(safelen = i2d_ASN1_SET(safes, NULL, i2d, V_ASN1_SEQUENCE,
94 : V_ASN1_UNIVERSAL, IS_SEQUENCE))) {
95 0 : ASN1err(ASN1_F_ASN1_SEQ_PACK, ASN1_R_ENCODE_ERROR);
96 0 : return NULL;
97 : }
98 0 : if (!(safe = OPENSSL_malloc(safelen))) {
99 0 : ASN1err(ASN1_F_ASN1_SEQ_PACK, ERR_R_MALLOC_FAILURE);
100 0 : return NULL;
101 : }
102 0 : p = safe;
103 0 : i2d_ASN1_SET(safes, &p, i2d, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL,
104 : IS_SEQUENCE);
105 0 : if (len)
106 0 : *len = safelen;
107 0 : if (buf)
108 0 : *buf = safe;
109 0 : return safe;
110 : }
111 :
112 : /* Extract an ASN1 object from an ASN1_STRING */
113 :
114 0 : void *ASN1_unpack_string(ASN1_STRING *oct, d2i_of_void *d2i)
115 : {
116 : const unsigned char *p;
117 : char *ret;
118 :
119 0 : p = oct->data;
120 0 : if (!(ret = d2i(NULL, &p, oct->length)))
121 0 : ASN1err(ASN1_F_ASN1_UNPACK_STRING, ASN1_R_DECODE_ERROR);
122 0 : return ret;
123 : }
124 :
125 : /* Pack an ASN1 object into an ASN1_STRING */
126 :
127 0 : ASN1_STRING *ASN1_pack_string(void *obj, i2d_of_void *i2d, ASN1_STRING **oct)
128 : {
129 : unsigned char *p;
130 : ASN1_STRING *octmp;
131 :
132 0 : if (!oct || !*oct) {
133 0 : if (!(octmp = ASN1_STRING_new())) {
134 0 : ASN1err(ASN1_F_ASN1_PACK_STRING, ERR_R_MALLOC_FAILURE);
135 0 : return NULL;
136 : }
137 0 : if (oct)
138 0 : *oct = octmp;
139 : } else
140 : octmp = *oct;
141 :
142 0 : if (!(octmp->length = i2d(obj, NULL))) {
143 0 : ASN1err(ASN1_F_ASN1_PACK_STRING, ASN1_R_ENCODE_ERROR);
144 0 : goto err;
145 : }
146 0 : if (!(p = OPENSSL_malloc(octmp->length))) {
147 0 : ASN1err(ASN1_F_ASN1_PACK_STRING, ERR_R_MALLOC_FAILURE);
148 0 : goto err;
149 : }
150 0 : octmp->data = p;
151 0 : i2d(obj, &p);
152 0 : return octmp;
153 : err:
154 0 : if (!oct || !*oct) {
155 0 : ASN1_STRING_free(octmp);
156 0 : if (oct)
157 0 : *oct = NULL;
158 : }
159 : return NULL;
160 : }
161 :
162 : #endif
163 :
164 : /* ASN1_ITEM versions of the above */
165 :
166 0 : ASN1_STRING *ASN1_item_pack(void *obj, const ASN1_ITEM *it, ASN1_STRING **oct)
167 : {
168 : ASN1_STRING *octmp;
169 :
170 0 : if (!oct || !*oct) {
171 0 : if (!(octmp = ASN1_STRING_new())) {
172 0 : ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE);
173 0 : return NULL;
174 : }
175 0 : if (oct)
176 0 : *oct = octmp;
177 : } else
178 : octmp = *oct;
179 :
180 0 : if (octmp->data) {
181 0 : OPENSSL_free(octmp->data);
182 0 : octmp->data = NULL;
183 : }
184 :
185 0 : if (!(octmp->length = ASN1_item_i2d(obj, &octmp->data, it))) {
186 0 : ASN1err(ASN1_F_ASN1_ITEM_PACK, ASN1_R_ENCODE_ERROR);
187 0 : return NULL;
188 : }
189 0 : if (!octmp->data) {
190 0 : ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE);
191 0 : return NULL;
192 : }
193 : return octmp;
194 : }
195 :
196 : /* Extract an ASN1 object from an ASN1_STRING */
197 :
198 0 : void *ASN1_item_unpack(ASN1_STRING *oct, const ASN1_ITEM *it)
199 : {
200 : const unsigned char *p;
201 : void *ret;
202 :
203 0 : p = oct->data;
204 0 : if (!(ret = ASN1_item_d2i(NULL, &p, oct->length, it)))
205 0 : ASN1err(ASN1_F_ASN1_ITEM_UNPACK, ASN1_R_DECODE_ERROR);
206 0 : return ret;
207 : }
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