hostapd/src/utils/uuid.c

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/*
* Universally Unique IDentifier (UUID)
* Copyright (c) 2008, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#include "includes.h"
#include "common.h"
#include "uuid.h"
int uuid_str2bin(const char *str, u8 *bin)
{
const char *pos;
u8 *opos;
pos = str;
opos = bin;
if (hexstr2bin(pos, opos, 4))
return -1;
pos += 8;
opos += 4;
if (*pos++ != '-' || hexstr2bin(pos, opos, 2))
return -1;
pos += 4;
opos += 2;
if (*pos++ != '-' || hexstr2bin(pos, opos, 2))
return -1;
pos += 4;
opos += 2;
if (*pos++ != '-' || hexstr2bin(pos, opos, 2))
return -1;
pos += 4;
opos += 2;
if (*pos++ != '-' || hexstr2bin(pos, opos, 6))
return -1;
return 0;
}
int uuid_bin2str(const u8 *bin, char *str, size_t max_len)
{
int len;
len = os_snprintf(str, max_len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
"%02x%02x-%02x%02x%02x%02x%02x%02x",
bin[0], bin[1], bin[2], bin[3],
bin[4], bin[5], bin[6], bin[7],
bin[8], bin[9], bin[10], bin[11],
bin[12], bin[13], bin[14], bin[15]);
if (len < 0 || (size_t) len >= max_len)
return -1;
return 0;
}