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1 | /* a_null.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 | /* ASN1 functions for NULL type. For compatability with other ASN1 code | |
64 | * it returns a pointer to an "ASN1_NULL" structure. The new/free functions | |
65 | * don't need to do any allocating because nothing is stored in a NULL. | |
66 | */ | |
67 | ||
68 | int i2d_ASN1_NULL(ASN1_NULL *a, unsigned char **pp) | |
69 | { | |
70 | if(!a) return 0; | |
71 | if (pp) ASN1_put_object(pp,0,0,V_ASN1_NULL,V_ASN1_UNIVERSAL); | |
72 | return 2; | |
73 | } | |
74 | ||
75 | ASN1_NULL *d2i_ASN1_NULL(ASN1_NULL **a, unsigned char **pp, long length) | |
76 | { | |
77 | ASN1_NULL *ret = NULL; | |
78 | unsigned char *p; | |
79 | long len; | |
80 | int inf,tag,xclass; | |
81 | int i=0; | |
82 | ||
83 | p= *pp; | |
84 | inf=ASN1_get_object(&p,&len,&tag,&xclass,length); | |
85 | if (inf & 0x80) | |
86 | { | |
87 | i=ASN1_R_BAD_OBJECT_HEADER; | |
88 | goto err; | |
89 | } | |
90 | ||
91 | if (tag != V_ASN1_NULL) | |
92 | { | |
93 | i=ASN1_R_EXPECTING_A_NULL; | |
94 | goto err; | |
95 | } | |
96 | ||
97 | if (len != 0) | |
98 | { | |
99 | i=ASN1_R_NULL_IS_WRONG_LENGTH; | |
100 | goto err; | |
101 | } | |
102 | ret=(ASN1_NULL *)1; | |
103 | if (a != NULL) (*a)=ret; | |
104 | *pp=p; | |
105 | return(ret); | |
106 | err: | |
107 | ASN1err(ASN1_F_D2I_ASN1_NULL,i); | |
108 | return(ret); | |
109 | } | |
110 | ||
111 | ASN1_NULL *ASN1_NULL_new(void) | |
112 | { | |
113 | return (ASN1_NULL *)1; | |
114 | } | |
115 | ||
116 | void ASN1_NULL_free(ASN1_NULL *a) | |
117 | { | |
118 | return; | |
119 | } |