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cfcefcbe DSH |
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" | |
ec577822 | 61 | #include <openssl/asn1.h> |
cfcefcbe DSH |
62 | |
63 | /* ASN1 packing and unpacking functions */ | |
64 | ||
65 | /* Turn an ASN1 encoded SEQUENCE OF into a STACK of structures */ | |
66 | ||
6b691a5c | 67 | STACK *ASN1_seq_unpack(unsigned char *buf, int len, char *(*d2i)(), |
13083215 | 68 | void (*free_func)(void *)) |
cfcefcbe DSH |
69 | { |
70 | STACK *sk; | |
71 | unsigned char *pbuf; | |
72 | pbuf = buf; | |
73 | if (!(sk = d2i_ASN1_SET(NULL, &pbuf, len, d2i, free_func, | |
74 | V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL))) | |
75 | ASN1err(ASN1_F_ASN1_SEQ_UNPACK,ASN1_R_DECODE_ERROR); | |
76 | return sk; | |
77 | } | |
78 | ||
79 | /* Turn a STACK structures into an ASN1 encoded SEQUENCE OF structure in a | |
26a3a48d | 80 | * OPENSSL_malloc'ed buffer |
cfcefcbe DSH |
81 | */ |
82 | ||
6b691a5c UM |
83 | unsigned char *ASN1_seq_pack(STACK *safes, int (*i2d)(), unsigned char **buf, |
84 | int *len) | |
cfcefcbe DSH |
85 | { |
86 | int safelen; | |
87 | unsigned char *safe, *p; | |
88 | if (!(safelen = i2d_ASN1_SET(safes, NULL, i2d, V_ASN1_SEQUENCE, | |
89 | V_ASN1_UNIVERSAL, IS_SEQUENCE))) { | |
90 | ASN1err(ASN1_F_ASN1_SEQ_PACK,ASN1_R_ENCODE_ERROR); | |
91 | return NULL; | |
92 | } | |
26a3a48d | 93 | if (!(safe = OPENSSL_malloc (safelen))) { |
cfcefcbe DSH |
94 | ASN1err(ASN1_F_ASN1_SEQ_PACK,ERR_R_MALLOC_FAILURE); |
95 | return NULL; | |
96 | } | |
97 | p = safe; | |
98 | i2d_ASN1_SET(safes, &p, i2d, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, | |
99 | IS_SEQUENCE); | |
100 | if (len) *len = safelen; | |
101 | if (buf) *buf = safe; | |
102 | return safe; | |
103 | } | |
104 | ||
105 | /* Extract an ASN1 object from an ASN1_STRING */ | |
106 | ||
8e21c146 | 107 | void *ASN1_unpack_string (ASN1_STRING *oct, char *(*d2i)()) |
cfcefcbe | 108 | { |
c5db363e BL |
109 | unsigned char *p; |
110 | char *ret; | |
111 | ||
cfcefcbe DSH |
112 | p = oct->data; |
113 | if(!(ret = d2i(NULL, &p, oct->length))) | |
114 | ASN1err(ASN1_F_ASN1_UNPACK_STRING,ASN1_R_DECODE_ERROR); | |
115 | return ret; | |
116 | } | |
117 | ||
118 | /* Pack an ASN1 object into an ASN1_STRING */ | |
119 | ||
8e21c146 | 120 | ASN1_STRING *ASN1_pack_string (void *obj, int (*i2d)(), ASN1_STRING **oct) |
cfcefcbe DSH |
121 | { |
122 | unsigned char *p; | |
123 | ASN1_STRING *octmp; | |
124 | ||
125 | if (!oct || !*oct) { | |
126 | if (!(octmp = ASN1_STRING_new ())) { | |
127 | ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE); | |
128 | return NULL; | |
129 | } | |
130 | if (oct) *oct = octmp; | |
131 | } else octmp = *oct; | |
132 | ||
133 | if (!(octmp->length = i2d(obj, NULL))) { | |
134 | ASN1err(ASN1_F_ASN1_PACK_STRING,ASN1_R_ENCODE_ERROR); | |
135 | return NULL; | |
136 | } | |
26a3a48d | 137 | if (!(p = OPENSSL_malloc (octmp->length))) { |
cfcefcbe DSH |
138 | ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE); |
139 | return NULL; | |
140 | } | |
141 | octmp->data = p; | |
142 | i2d (obj, &p); | |
143 | return octmp; | |
144 | } | |
145 |