crypto/external/bsd/heimdal/dist/lib/asn1/der_length.c

   1 /*      $NetBSD: der_length.c,v 1.1.1.2 2014/04/24 12:45:28 pettai Exp $        */
   2
   3 /*
   4  * Copyright (c) 1997-2005 Kungliga Tekniska Högskolan
   5  * (Royal Institute of Technology, Stockholm, Sweden).
   6  * All rights reserved.
   7  *
   8  * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  *
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  *
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  *
  21  * 3. Neither the name of the Institute nor the names of its contributors
  22  *    may be used to endorse or promote products derived from this software
  23  *    without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  35  * SUCH DAMAGE.
  36  */
  37
  38 #include "der_locl.h"
  39
  40 __RCSID("NetBSD");
  41
  42 size_t
  43 _heim_len_unsigned (unsigned val)
  44 {
  45     size_t ret = 0;
  46     int last_val_gt_128;
  47
  48     do {
  49         ++ret;
  50         last_val_gt_128 = (val >= 128);
  51         val /= 256;
  52     } while (val);
  53
  54     if(last_val_gt_128)
  55         ret++;
  56
  57     return ret;
  58 }
  59
  60 size_t
  61 _heim_len_int (int val)
  62 {
  63     unsigned char q;
  64     size_t ret = 0;
  65
  66     if (val >= 0) {
  67         do {
  68             q = val % 256;
  69             ret++;
  70             val /= 256;
  71         } while(val);
  72         if(q >= 128)
  73             ret++;
  74     } else {
  75         val = ~val;
  76         do {
  77             q = ~(val % 256);
  78             ret++;
  79             val /= 256;
  80         } while(val);
  81         if(q < 128)
  82             ret++;
  83     }
  84     return ret;
  85 }
  86
  87 static size_t
  88 len_oid (const heim_oid *oid)
  89 {
  90     size_t ret = 1;
  91     size_t n;
  92
  93     for (n = 2; n < oid->length; ++n) {
  94         unsigned u = oid->components[n];
  95
  96         do {
  97             ++ret;
  98             u /= 128;
  99         } while(u > 0);
 100     }
 101     return ret;
 102 }
 103
 104 size_t
 105 der_length_len (size_t len)
 106 {
 107     if (len < 128)
 108         return 1;
 109     else {
 110         int ret = 0;
 111         do {
 112             ++ret;
 113             len /= 256;
 114         } while (len);
 115         return ret + 1;
 116     }
 117 }
 118
 119 size_t
 120 der_length_tag(unsigned int tag)
 121 {
 122     size_t len = 0;
 123
 124     if(tag <= 30)
 125         return 1;
 126     while(tag) {
 127         tag /= 128;
 128         len++;
 129     }
 130     return len + 1;
 131 }
 132
 133 size_t
 134 der_length_integer (const int *data)
 135 {
 136     return _heim_len_int (*data);
 137 }
 138
 139 size_t
 140 der_length_unsigned (const unsigned *data)
 141 {
 142     return _heim_len_unsigned(*data);
 143 }
 144
 145 size_t
 146 der_length_enumerated (const unsigned *data)
 147 {
 148   return _heim_len_int (*data);
 149 }
 150
 151 size_t
 152 der_length_general_string (const heim_general_string *data)
 153 {
 154     return strlen(*data);
 155 }
 156
 157 size_t
 158 der_length_utf8string (const heim_utf8_string *data)
 159 {
 160     return strlen(*data);
 161 }
 162
 163 size_t
 164 der_length_printable_string (const heim_printable_string *data)
 165 {
 166     return data->length;
 167 }
 168
 169 size_t
 170 der_length_ia5_string (const heim_ia5_string *data)
 171 {
 172     return data->length;
 173 }
 174
 175 size_t
 176 der_length_bmp_string (const heim_bmp_string *data)
 177 {
 178     return data->length * 2;
 179 }
 180
 181 size_t
 182 der_length_universal_string (const heim_universal_string *data)
 183 {
 184     return data->length * 4;
 185 }
 186
 187 size_t
 188 der_length_visible_string (const heim_visible_string *data)
 189 {
 190     return strlen(*data);
 191 }
 192
 193 size_t
 194 der_length_octet_string (const heim_octet_string *k)
 195 {
 196     return k->length;
 197 }
 198
 199 size_t
 200 der_length_heim_integer (const heim_integer *k)
 201 {
 202     if (k->length == 0)
 203         return 1;
 204     if (k->negative)
 205         return k->length + (((~(((unsigned char *)k->data)[0])) & 0x80) ? 0 : 1);
 206     else
 207         return k->length + ((((unsigned char *)k->data)[0] & 0x80) ? 1 : 0);
 208 }
 209
 210 size_t
 211 der_length_oid (const heim_oid *k)
 212 {
 213     return len_oid (k);
 214 }
 215
 216 size_t
 217 der_length_generalized_time (const time_t *t)
 218 {
 219     heim_octet_string k;
 220     size_t ret;
 221
 222     _heim_time2generalizedtime (*t, &k, 1);
 223     ret = k.length;
 224     free(k.data);
 225     return ret;
 226 }
 227
 228 size_t
 229 der_length_utctime (const time_t *t)
 230 {
 231     heim_octet_string k;
 232     size_t ret;
 233
 234     _heim_time2generalizedtime (*t, &k, 0);
 235     ret = k.length;
 236     free(k.data);
 237     return ret;
 238 }
 239
 240 size_t
 241 der_length_boolean (const int *k)
 242 {
 243     return 1;
 244 }
 245
 246 size_t
 247 der_length_bit_string (const heim_bit_string *k)
 248 {
 249     return (k->length + 7) / 8 + 1;
 250 }