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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 return NULL; | |
138 } | |
139 if (!(p = OPENSSL_malloc (octmp->length))) { | |
140 ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE); | |
141 return NULL; | |
142 } | |
143 octmp->data = p; | |
144 i2d (obj, &p); | |
145 return octmp; | |
146 } | |
147 | |
148 #endif | |
149 | |
150 /* ASN1_ITEM versions of the above */ | |
151 | |
152 ASN1_STRING *ASN1_item_pack(void *obj, const ASN1_ITEM *it, ASN1_STRING **oct) | |
153 { | |
154 ASN1_STRING *octmp; | |
155 | |
156 if (!oct || !*oct) { | |
157 if (!(octmp = ASN1_STRING_new ())) { | |
158 ASN1err(ASN1_F_ASN1_ITEM_PACK,ERR_R_MALLOC_FAILURE); | |
159 return NULL; | |
160 } | |
161 if (oct) *oct = octmp; | |
162 } else octmp = *oct; | |
163 | |
164 if(octmp->data) { | |
165 OPENSSL_free(octmp->data); | |
166 octmp->data = NULL; | |
167 } | |
168 | |
169 if (!(octmp->length = ASN1_item_i2d(obj, &octmp->data, it))) { | |
170 ASN1err(ASN1_F_ASN1_ITEM_PACK,ASN1_R_ENCODE_ERROR); | |
171 return NULL; | |
172 } | |
173 if (!octmp->data) { | |
174 ASN1err(ASN1_F_ASN1_ITEM_PACK,ERR_R_MALLOC_FAILURE); | |
175 return NULL; | |
176 } | |
177 return octmp; | |
178 } | |
179 | |
180 /* Extract an ASN1 object from an ASN1_STRING */ | |
181 | |
182 void *ASN1_item_unpack(ASN1_STRING *oct, const ASN1_ITEM *it) | |
183 { | |
184 const unsigned char *p; | |
185 void *ret; | |
186 | |
187 p = oct->data; | |
188 if(!(ret = ASN1_item_d2i(NULL, &p, oct->length, it))) | |
189 ASN1err(ASN1_F_ASN1_ITEM_UNPACK,ASN1_R_DECODE_ERROR); | |
190 return ret; | |
191 } | |
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