xref: /freebsd/crypto/heimdal/lib/asn1/der.c (revision 7661de35d15f582ab33e3bd6b8d909601557e436)
1 /*
2  * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
3  * (Royal Institute of Technology, Stockholm, Sweden).
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  *
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  *
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  *
17  * 3. Neither the name of the Institute nor the names of its contributors
18  *    may be used to endorse or promote products derived from this software
19  *    without specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  */
33 
34 #include "der_locl.h"
35 #include <com_err.h>
36 #include <sys/types.h>
37 #include <sys/stat.h>
38 #include <getarg.h>
39 #include <err.h>
40 
41 RCSID("$Id$");
42 
43 
44 static const char *class_names[] = {
45     "UNIV",			/* 0 */
46     "APPL",			/* 1 */
47     "CONTEXT",			/* 2 */
48     "PRIVATE"			/* 3 */
49 };
50 
51 static const char *type_names[] = {
52     "PRIM",			/* 0 */
53     "CONS"			/* 1 */
54 };
55 
56 static const char *tag_names[] = {
57     "EndOfContent",		/* 0 */
58     "Boolean",			/* 1 */
59     "Integer",			/* 2 */
60     "BitString",		/* 3 */
61     "OctetString",		/* 4 */
62     "Null",			/* 5 */
63     "ObjectID",			/* 6 */
64     NULL,			/* 7 */
65     NULL,			/* 8 */
66     NULL,			/* 9 */
67     "Enumerated",		/* 10 */
68     NULL,			/* 11 */
69     NULL,			/* 12 */
70     NULL,			/* 13 */
71     NULL,			/* 14 */
72     NULL,			/* 15 */
73     "Sequence",			/* 16 */
74     "Set",			/* 17 */
75     NULL,			/* 18 */
76     "PrintableString",		/* 19 */
77     NULL,			/* 20 */
78     NULL,			/* 21 */
79     "IA5String",		/* 22 */
80     "UTCTime",			/* 23 */
81     "GeneralizedTime",		/* 24 */
82     NULL,			/* 25 */
83     "VisibleString",		/* 26 */
84     "GeneralString",		/* 27 */
85     NULL,			/* 28 */
86     NULL,			/* 29 */
87     "BMPString"			/* 30 */
88 };
89 
90 static int
91 get_type(const char *name, const char *list[], unsigned len)
92 {
93     unsigned i;
94     for (i = 0; i < len; i++)
95 	if (list[i] && strcasecmp(list[i], name) == 0)
96 	    return i;
97     return -1;
98 }
99 
100 #define SIZEOF_ARRAY(a) (sizeof((a))/sizeof((a)[0]))
101 
102 const char *
103 der_get_class_name(unsigned num)
104 {
105     if (num >= SIZEOF_ARRAY(class_names))
106 	return NULL;
107     return class_names[num];
108 }
109 
110 int
111 der_get_class_num(const char *name)
112 {
113     return get_type(name, class_names, SIZEOF_ARRAY(class_names));
114 }
115 
116 const char *
117 der_get_type_name(unsigned num)
118 {
119     if (num >= SIZEOF_ARRAY(type_names))
120 	return NULL;
121     return type_names[num];
122 }
123 
124 int
125 der_get_type_num(const char *name)
126 {
127     return get_type(name, type_names, SIZEOF_ARRAY(type_names));
128 }
129 
130 const char *
131 der_get_tag_name(unsigned num)
132 {
133     if (num >= SIZEOF_ARRAY(tag_names))
134 	return NULL;
135     return tag_names[num];
136 }
137 
138 int
139 der_get_tag_num(const char *name)
140 {
141     return get_type(name, tag_names, SIZEOF_ARRAY(tag_names));
142 }
143