lib/asn1/der.c

   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 }