112 lines
2.8 KiB
C
112 lines
2.8 KiB
C
/*
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* Copyright (c) 1997, 1998, 1999 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "der_locl.h"
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RCSID("$Id: der_length.c,v 1.10 1999/12/02 17:05:01 joda Exp $");
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static size_t
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length_unsigned (unsigned val)
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{
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size_t ret = 0;
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do {
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++ret;
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val /= 256;
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} while (val);
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return ret;
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}
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static size_t
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length_int (int val)
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{
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size_t ret = 0;
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if (val == 0)
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return 1;
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while (val > 255 || val < -255) {
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++ret;
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val /= 256;
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}
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if (val != 0) {
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++ret;
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if ((signed char)val != val)
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++ret;
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val /= 256;
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}
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return ret;
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}
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size_t
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length_len (size_t len)
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{
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if (len < 128)
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return 1;
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else
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return length_unsigned (len) + 1;
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}
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size_t
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length_integer (const int *data)
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{
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size_t len = length_int (*data);
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return 1 + length_len(len) + len;
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}
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size_t
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length_general_string (const general_string *data)
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{
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char *str = *data;
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size_t len = strlen(str);
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return 1 + length_len(len) + len;
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}
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size_t
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length_octet_string (const octet_string *k)
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{
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return 1 + length_len(k->length) + k->length;
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}
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size_t
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length_generalized_time (const time_t *t)
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{
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octet_string k;
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size_t ret;
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time2generalizedtime (*t, &k);
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ret = 1 + length_len(k.length) + k.length;
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free (k.data);
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return ret;
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}
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