crypto/dist/heimdal/lib/asn1/der_length.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
  36 __RCSID("$Heimdal: der_length.c 19539 2006-12-28 17:15:05Z lha $"
  37         "$NetBSD$");
  38
  39 size_t
  40 _heim_len_unsigned (unsigned val)
  41 {
  42     size_t ret = 0;
  43     int last_val_gt_128;
  44
  45     do {
  46         ++ret;
  47         last_val_gt_128 = (val >= 128);
  48         val /= 256;
  49     } while (val);
  50
  51     if(last_val_gt_128)
  52         ret++;
  53
  54     return ret;
  55 }
  56
  57 size_t
  58 _heim_len_int (int val)
  59 {
  60     unsigned char q;
  61     size_t ret = 0;
  62
  63     if (val >= 0) {
  64         do {
  65             q = val % 256;
  66             ret++;
  67             val /= 256;
  68         } while(val);
  69         if(q >= 128)
  70             ret++;
  71     } else {
  72         val = ~val;
  73         do {
  74             q = ~(val % 256);
  75             ret++;
  76             val /= 256;
  77         } while(val);
  78         if(q < 128)
  79             ret++;
  80     }
  81     return ret;
  82 }
  83
  84 static size_t
  85 len_oid (const heim_oid *oid)
  86 {
  87     size_t ret = 1;
  88     int n;
  89
  90     for (n = 2; n < oid->length; ++n) {
  91         unsigned u = oid->components[n];
  92
  93         do {
  94             ++ret;
  95             u /= 128;
  96         } while(u > 0);
  97     }
  98     return ret;
  99 }
 100
 101 size_t
 102 der_length_len (size_t len)
 103 {
 104     if (len < 128)
 105         return 1;
 106     else {
 107         int ret = 0;
 108         do {
 109             ++ret;
 110             len /= 256;
 111         } while (len);
 112         return ret + 1;
 113     }
 114 }
 115
 116 size_t
 117 der_length_integer (const int *data)
 118 {
 119     return _heim_len_int (*data);
 120 }
 121
 122 size_t
 123 der_length_unsigned (const unsigned *data)
 124 {
 125     return _heim_len_unsigned(*data);
 126 }
 127
 128 size_t
 129 der_length_enumerated (const unsigned *data)
 130 {
 131   return _heim_len_int (*data);
 132 }
 133
 134 size_t
 135 der_length_general_string (const heim_general_string *data)
 136 {
 137     return strlen(*data);
 138 }
 139
 140 size_t
 141 der_length_utf8string (const heim_utf8_string *data)
 142 {
 143     return strlen(*data);
 144 }
 145
 146 size_t
 147 der_length_printable_string (const heim_printable_string *data)
 148 {
 149     return strlen(*data);
 150 }
 151
 152 size_t
 153 der_length_ia5_string (const heim_ia5_string *data)
 154 {
 155     return strlen(*data);
 156 }
 157
 158 size_t
 159 der_length_bmp_string (const heim_bmp_string *data)
 160 {
 161     return data->length * 2;
 162 }
 163
 164 size_t
 165 der_length_universal_string (const heim_universal_string *data)
 166 {
 167     return data->length * 4;
 168 }
 169
 170 size_t
 171 der_length_visible_string (const heim_visible_string *data)
 172 {
 173     return strlen(*data);
 174 }
 175
 176 size_t
 177 der_length_octet_string (const heim_octet_string *k)
 178 {
 179     return k->length;
 180 }
 181
 182 size_t
 183 der_length_heim_integer (const heim_integer *k)
 184 {
 185     if (k->length == 0)
 186         return 1;
 187     if (k->negative)
 188         return k->length + (((~(((unsigned char *)k->data)[0])) & 0x80) ? 0 : 1);
 189     else
 190         return k->length + ((((unsigned char *)k->data)[0] & 0x80) ? 1 : 0);
 191 }
 192
 193 size_t
 194 der_length_oid (const heim_oid *k)
 195 {
 196     return len_oid (k);
 197 }
 198
 199 size_t
 200 der_length_generalized_time (const time_t *t)
 201 {
 202     heim_octet_string k;
 203     size_t ret;
 204
 205     _heim_time2generalizedtime (*t, &k, 1);
 206     ret = k.length;
 207     free(k.data);
 208     return ret;
 209 }
 210
 211 size_t
 212 der_length_utctime (const time_t *t)
 213 {
 214     heim_octet_string k;
 215     size_t ret;
 216
 217     _heim_time2generalizedtime (*t, &k, 0);
 218     ret = k.length;
 219     free(k.data);
 220     return ret;
 221 }
 222
 223 size_t
 224 der_length_boolean (const int *k)
 225 {
 226     return 1;
 227 }
 228
 229 size_t
 230 der_length_bit_string (const heim_bit_string *k)
 231 {
 232     return (k->length + 7) / 8 + 1;
 233 }