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cfcefcbe | 1 | /* asn_pack.c */ |
ae5c8664 MC |
2 | /* |
3 | * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project | |
4 | * 1999. | |
cfcefcbe DSH |
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 | |
ae5c8664 | 14 | * notice, this list of conditions and the following disclaimer. |
cfcefcbe DSH |
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" | |
ec577822 | 62 | #include <openssl/asn1.h> |
cfcefcbe | 63 | |
4e1209eb DSH |
64 | #ifndef NO_ASN1_OLD |
65 | ||
cfcefcbe DSH |
66 | /* ASN1 packing and unpacking functions */ |
67 | ||
68 | /* Turn an ASN1 encoded SEQUENCE OF into a STACK of structures */ | |
69 | ||
ec6158d0 | 70 | STACK_OF(OPENSSL_BLOCK) *ASN1_seq_unpack(const unsigned char *buf, int len, |
ae5c8664 MC |
71 | d2i_of_void *d2i, |
72 | void (*free_func) (OPENSSL_BLOCK)) | |
cfcefcbe | 73 | { |
ec6158d0 | 74 | STACK_OF(OPENSSL_BLOCK) *sk; |
875a644a | 75 | const unsigned char *pbuf; |
ae5c8664 | 76 | pbuf = buf; |
cfcefcbe | 77 | if (!(sk = d2i_ASN1_SET(NULL, &pbuf, len, d2i, free_func, |
ae5c8664 MC |
78 | V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL))) |
79 | ASN1err(ASN1_F_ASN1_SEQ_UNPACK, ASN1_R_DECODE_ERROR); | |
cfcefcbe DSH |
80 | return sk; |
81 | } | |
82 | ||
ae5c8664 MC |
83 | /* |
84 | * Turn a STACK structures into an ASN1 encoded SEQUENCE OF structure in a | |
26a3a48d | 85 | * OPENSSL_malloc'ed buffer |
cfcefcbe DSH |
86 | */ |
87 | ||
ec6158d0 | 88 | unsigned char *ASN1_seq_pack(STACK_OF(OPENSSL_BLOCK) *safes, i2d_of_void *i2d, |
ae5c8664 | 89 | unsigned char **buf, int *len) |
cfcefcbe | 90 | { |
ae5c8664 MC |
91 | int safelen; |
92 | unsigned char *safe, *p; | |
93 | if (!(safelen = i2d_ASN1_SET(safes, NULL, i2d, V_ASN1_SEQUENCE, | |
94 | V_ASN1_UNIVERSAL, IS_SEQUENCE))) { | |
95 | ASN1err(ASN1_F_ASN1_SEQ_PACK, ASN1_R_ENCODE_ERROR); | |
96 | return NULL; | |
97 | } | |
98 | if (!(safe = OPENSSL_malloc(safelen))) { | |
99 | ASN1err(ASN1_F_ASN1_SEQ_PACK, ERR_R_MALLOC_FAILURE); | |
100 | return NULL; | |
101 | } | |
102 | p = safe; | |
103 | i2d_ASN1_SET(safes, &p, i2d, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, | |
104 | IS_SEQUENCE); | |
105 | if (len) | |
106 | *len = safelen; | |
107 | if (buf) | |
108 | *buf = safe; | |
109 | return safe; | |
cfcefcbe DSH |
110 | } |
111 | ||
112 | /* Extract an ASN1 object from an ASN1_STRING */ | |
113 | ||
fbeaa3c4 | 114 | void *ASN1_unpack_string(ASN1_STRING *oct, d2i_of_void *d2i) |
cfcefcbe | 115 | { |
ae5c8664 MC |
116 | const unsigned char *p; |
117 | char *ret; | |
c5db363e | 118 | |
ae5c8664 MC |
119 | p = oct->data; |
120 | if (!(ret = d2i(NULL, &p, oct->length))) | |
121 | ASN1err(ASN1_F_ASN1_UNPACK_STRING, ASN1_R_DECODE_ERROR); | |
122 | return ret; | |
cfcefcbe DSH |
123 | } |
124 | ||
125 | /* Pack an ASN1 object into an ASN1_STRING */ | |
126 | ||
8bb826ee | 127 | ASN1_STRING *ASN1_pack_string(void *obj, i2d_of_void *i2d, ASN1_STRING **oct) |
cfcefcbe | 128 | { |
ae5c8664 MC |
129 | unsigned char *p; |
130 | ASN1_STRING *octmp; | |
131 | ||
132 | if (!oct || !*oct) { | |
133 | if (!(octmp = ASN1_STRING_new())) { | |
134 | ASN1err(ASN1_F_ASN1_PACK_STRING, ERR_R_MALLOC_FAILURE); | |
135 | return NULL; | |
136 | } | |
137 | if (oct) | |
138 | *oct = octmp; | |
139 | } else | |
140 | octmp = *oct; | |
141 | ||
142 | if (!(octmp->length = i2d(obj, NULL))) { | |
143 | ASN1err(ASN1_F_ASN1_PACK_STRING, ASN1_R_ENCODE_ERROR); | |
144 | goto err; | |
145 | } | |
146 | if (!(p = OPENSSL_malloc(octmp->length))) { | |
147 | ASN1err(ASN1_F_ASN1_PACK_STRING, ERR_R_MALLOC_FAILURE); | |
148 | goto err; | |
149 | } | |
150 | octmp->data = p; | |
151 | i2d(obj, &p); | |
152 | return octmp; | |
153 | err: | |
154 | if (!oct || !*oct) { | |
155 | ASN1_STRING_free(octmp); | |
156 | if (oct) | |
157 | *oct = NULL; | |
158 | } | |
159 | return NULL; | |
cfcefcbe DSH |
160 | } |
161 | ||
4e1209eb DSH |
162 | #endif |
163 | ||
09ab755c DSH |
164 | /* ASN1_ITEM versions of the above */ |
165 | ||
ecbe0781 | 166 | ASN1_STRING *ASN1_item_pack(void *obj, const ASN1_ITEM *it, ASN1_STRING **oct) |
09ab755c | 167 | { |
ae5c8664 MC |
168 | ASN1_STRING *octmp; |
169 | ||
170 | if (!oct || !*oct) { | |
171 | if (!(octmp = ASN1_STRING_new())) { | |
172 | ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE); | |
173 | return NULL; | |
174 | } | |
175 | if (oct) | |
176 | *oct = octmp; | |
177 | } else | |
178 | octmp = *oct; | |
179 | ||
180 | if (octmp->data) { | |
181 | OPENSSL_free(octmp->data); | |
182 | octmp->data = NULL; | |
183 | } | |
184 | ||
185 | if (!(octmp->length = ASN1_item_i2d(obj, &octmp->data, it))) { | |
186 | ASN1err(ASN1_F_ASN1_ITEM_PACK, ASN1_R_ENCODE_ERROR); | |
187 | return NULL; | |
188 | } | |
189 | if (!octmp->data) { | |
190 | ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE); | |
191 | return NULL; | |
192 | } | |
193 | return octmp; | |
09ab755c DSH |
194 | } |
195 | ||
196 | /* Extract an ASN1 object from an ASN1_STRING */ | |
197 | ||
ecbe0781 | 198 | void *ASN1_item_unpack(ASN1_STRING *oct, const ASN1_ITEM *it) |
09ab755c | 199 | { |
ae5c8664 MC |
200 | const unsigned char *p; |
201 | void *ret; | |
09ab755c | 202 | |
ae5c8664 MC |
203 | p = oct->data; |
204 | if (!(ret = ASN1_item_d2i(NULL, &p, oct->length, it))) | |
205 | ASN1err(ASN1_F_ASN1_ITEM_UNPACK, ASN1_R_DECODE_ERROR); | |
206 | return ret; | |
09ab755c | 207 | } |