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/*
* Copyright (c) 2005 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "der_locl.h"
#include <hex.h>
RCSID("$Id: der_format.c,v 1.2 2006/01/16 23:01:11 lha Exp $");
int
der_parse_hex_heim_integer (const char *p, heim_integer *data)
{
ssize_t len;
data->length = 0;
data->negative = 0;
data->data = NULL;
if (*p == '-') {
p++;
data->negative = 1;
}
len = strlen(p);
if (len < 0) {
data->data = NULL;
data->length = 0;
return EINVAL;
}
data->length = (len / 2) + 1;
data->data = malloc(data->length);
if (data->data == NULL) {
data->length = 0;
return ENOMEM;
}
len = hex_decode(p, data->data, data->length);
if (len < 0) {
free(data->data);
data->data = NULL;
data->length = 0;
return EINVAL;
}
{
unsigned char *p = data->data;
while(*p == 0 && len > 0) {
p++;
len--;
}
data->length = len;
memmove(data->data, p, len);
}
return 0;
}
int
der_print_hex_heim_integer (const heim_integer *data, char **p)
{
ssize_t len;
char *q;
len = hex_encode(data->data, data->length, p);
if (len < 0)
return ENOMEM;
if (data->negative) {
len = asprintf(&q, "-%s", *p);
free(*p);
if (len < 0)
return ENOMEM;
*p = q;
}
return 0;
}
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