der_length.c revision 233294
1/* 2 * Copyright (c) 1997-2005 Kungliga Tekniska H��gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Portions Copyright (c) 2009 Apple Inc. 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 the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * 3. Neither the name of the Institute nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36#include "der_locl.h" 37 38RCSID("$Id$"); 39 40size_t 41_heim_len_unsigned (unsigned val) 42{ 43 size_t ret = 0; 44 int last_val_gt_128; 45 46 do { 47 ++ret; 48 last_val_gt_128 = (val >= 128); 49 val /= 256; 50 } while (val); 51 52 if(last_val_gt_128) 53 ret++; 54 55 return ret; 56} 57 58size_t 59_heim_len_int (int val) 60{ 61 unsigned char q; 62 size_t ret = 0; 63 64 if (val >= 0) { 65 do { 66 q = val % 256; 67 ret++; 68 val /= 256; 69 } while(val); 70 if(q >= 128) 71 ret++; 72 } else { 73 val = ~val; 74 do { 75 q = ~(val % 256); 76 ret++; 77 val /= 256; 78 } while(val); 79 if(q < 128) 80 ret++; 81 } 82 return ret; 83} 84 85static size_t 86len_oid (const heim_oid *oid) 87{ 88 size_t ret = 1; 89 size_t n; 90 91 for (n = 2; n < oid->length; ++n) { 92 unsigned u = oid->components[n]; 93 94 do { 95 ++ret; 96 u /= 128; 97 } while(u > 0); 98 } 99 return ret; 100} 101 102size_t 103der_length_len (size_t len) 104{ 105 if (len < 128) 106 return 1; 107 else { 108 int ret = 0; 109 do { 110 ++ret; 111 len /= 256; 112 } while (len); 113 return ret + 1; 114 } 115} 116 117size_t 118der_length_tag(unsigned int tag) 119{ 120 size_t len = 0; 121 122 if(tag <= 30) 123 return 1; 124 while(tag) { 125 tag /= 128; 126 len++; 127 } 128 return len + 1; 129} 130 131size_t 132der_length_integer (const int *data) 133{ 134 return _heim_len_int (*data); 135} 136 137size_t 138der_length_unsigned (const unsigned *data) 139{ 140 return _heim_len_unsigned(*data); 141} 142 143size_t 144der_length_enumerated (const unsigned *data) 145{ 146 return _heim_len_int (*data); 147} 148 149size_t 150der_length_general_string (const heim_general_string *data) 151{ 152 return strlen(*data); 153} 154 155size_t 156der_length_utf8string (const heim_utf8_string *data) 157{ 158 return strlen(*data); 159} 160 161size_t 162der_length_printable_string (const heim_printable_string *data) 163{ 164 return data->length; 165} 166 167size_t 168der_length_ia5_string (const heim_ia5_string *data) 169{ 170 return data->length; 171} 172 173size_t 174der_length_bmp_string (const heim_bmp_string *data) 175{ 176 return data->length * 2; 177} 178 179size_t 180der_length_universal_string (const heim_universal_string *data) 181{ 182 return data->length * 4; 183} 184 185size_t 186der_length_visible_string (const heim_visible_string *data) 187{ 188 return strlen(*data); 189} 190 191size_t 192der_length_octet_string (const heim_octet_string *k) 193{ 194 return k->length; 195} 196 197size_t 198der_length_heim_integer (const heim_integer *k) 199{ 200 if (k->length == 0) 201 return 1; 202 if (k->negative) 203 return k->length + (((~(((unsigned char *)k->data)[0])) & 0x80) ? 0 : 1); 204 else 205 return k->length + ((((unsigned char *)k->data)[0] & 0x80) ? 1 : 0); 206} 207 208size_t 209der_length_oid (const heim_oid *k) 210{ 211 return len_oid (k); 212} 213 214size_t 215der_length_generalized_time (const time_t *t) 216{ 217 heim_octet_string k; 218 size_t ret; 219 220 _heim_time2generalizedtime (*t, &k, 1); 221 ret = k.length; 222 free(k.data); 223 return ret; 224} 225 226size_t 227der_length_utctime (const time_t *t) 228{ 229 heim_octet_string k; 230 size_t ret; 231 232 _heim_time2generalizedtime (*t, &k, 0); 233 ret = k.length; 234 free(k.data); 235 return ret; 236} 237 238size_t 239der_length_boolean (const int *k) 240{ 241 return 1; 242} 243 244size_t 245der_length_bit_string (const heim_bit_string *k) 246{ 247 return (k->length + 7) / 8 + 1; 248} 249