Give everything prototypes (well, everything that's actually used).
[openssl.git] / crypto / asn1 / asn_pack.c
1 /* asn_pack.c */
2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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 *ASN1_seq_unpack(const unsigned char *buf, int len,
70                        char *(*d2i)(void **,const unsigned char **,long),
71                        void (*free_func)(void *))
72 {
73     STACK *sk;
74     const unsigned char *pbuf;
75     pbuf =  buf;
76     if (!(sk = d2i_ASN1_SET(NULL, &pbuf, len, d2i, free_func,
77                                         V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL)))
78                  ASN1err(ASN1_F_ASN1_SEQ_UNPACK,ASN1_R_DECODE_ERROR);
79     return sk;
80 }
81
82 /* Turn a STACK structures into an ASN1 encoded SEQUENCE OF structure in a
83  * OPENSSL_malloc'ed buffer
84  */
85
86 unsigned char *ASN1_seq_pack(STACK *safes, int (*i2d)(void *,unsigned char **),
87                              unsigned char **buf, int *len)
88 {
89         int safelen;
90         unsigned char *safe, *p;
91         if (!(safelen = i2d_ASN1_SET(safes, NULL, i2d, V_ASN1_SEQUENCE,
92                                               V_ASN1_UNIVERSAL, IS_SEQUENCE))) {
93                 ASN1err(ASN1_F_ASN1_SEQ_PACK,ASN1_R_ENCODE_ERROR);
94                 return NULL;
95         }
96         if (!(safe = OPENSSL_malloc (safelen))) {
97                 ASN1err(ASN1_F_ASN1_SEQ_PACK,ERR_R_MALLOC_FAILURE);
98                 return NULL;
99         }
100         p = safe;
101         i2d_ASN1_SET(safes, &p, i2d, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL,
102                                                                  IS_SEQUENCE);
103         if (len) *len = safelen;
104         if (buf) *buf = safe;
105         return safe;
106 }
107
108 /* Extract an ASN1 object from an ASN1_STRING */
109
110 void *ASN1_unpack_string (ASN1_STRING *oct,
111                           void *(*d2i)(void *,const unsigned char **,long))
112 {
113         const unsigned char *p;
114         char *ret;
115
116         p = oct->data;
117         if(!(ret = d2i(NULL, &p, oct->length)))
118                 ASN1err(ASN1_F_ASN1_UNPACK_STRING,ASN1_R_DECODE_ERROR);
119         return ret;
120 }
121
122 /* Pack an ASN1 object into an ASN1_STRING */
123
124 ASN1_STRING *ASN1_pack_string(void *obj, int (*i2d)(void *,unsigned char **),
125                               ASN1_STRING **oct)
126 {
127         unsigned char *p;
128         ASN1_STRING *octmp;
129
130         if (!oct || !*oct) {
131                 if (!(octmp = ASN1_STRING_new ())) {
132                         ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE);
133                         return NULL;
134                 }
135                 if (oct) *oct = octmp;
136         } else octmp = *oct;
137                 
138         if (!(octmp->length = i2d(obj, NULL))) {
139                 ASN1err(ASN1_F_ASN1_PACK_STRING,ASN1_R_ENCODE_ERROR);
140                 return NULL;
141         }
142         if (!(p = OPENSSL_malloc (octmp->length))) {
143                 ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE);
144                 return NULL;
145         }
146         octmp->data = p;
147         i2d (obj, &p);
148         return octmp;
149 }
150
151 #endif
152
153 /* ASN1_ITEM versions of the above */
154
155 ASN1_STRING *ASN1_item_pack(void *obj, const ASN1_ITEM *it, ASN1_STRING **oct)
156 {
157         ASN1_STRING *octmp;
158
159         if (!oct || !*oct) {
160                 if (!(octmp = ASN1_STRING_new ())) {
161                         ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE);
162                         return NULL;
163                 }
164                 if (oct) *oct = octmp;
165         } else octmp = *oct;
166
167         if(octmp->data) {
168                 OPENSSL_free(octmp->data);
169                 octmp->data = NULL;
170         }
171                 
172         if (!(octmp->length = ASN1_item_i2d(obj, &octmp->data, it))) {
173                 ASN1err(ASN1_F_ASN1_PACK_STRING,ASN1_R_ENCODE_ERROR);
174                 return NULL;
175         }
176         if (!octmp->data) {
177                 ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE);
178                 return NULL;
179         }
180         return octmp;
181 }
182
183 /* Extract an ASN1 object from an ASN1_STRING */
184
185 void *ASN1_item_unpack(ASN1_STRING *oct, const ASN1_ITEM *it)
186 {
187         const unsigned char *p;
188         void *ret;
189
190         p = oct->data;
191         if(!(ret = ASN1_item_d2i(NULL, &p, oct->length, it)))
192                 ASN1err(ASN1_F_ASN1_UNPACK_STRING,ASN1_R_DECODE_ERROR);
193         return ret;
194 }