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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details:
*
* Copyright (C) 2010 Red Hat, Inc.
*/
#include <config.h>
#include <glib.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <errno.h>
#include "mm-utils.h"
/* From hostap, Copyright (c) 2002-2005, Jouni Malinen <jkmaline@cc.hut.fi> */
static int hex2num (char c)
{
if (c >= '0' && c <= '9')
return c - '0';
if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
if (c >= 'A' && c <= 'F')
return c - 'A' + 10;
return -1;
}
int utils_hex2byte (const char *hex)
{
int a, b;
a = hex2num(*hex++);
if (a < 0)
return -1;
b = hex2num(*hex++);
if (b < 0)
return -1;
return (a << 4) | b;
}
char *
utils_hexstr2bin (const char *hex, gsize *out_len)
{
size_t len = strlen (hex);
size_t i;
int a;
const char * ipos = hex;
char * buf = NULL;
char * opos;
/* Length must be a multiple of 2 */
g_return_val_if_fail ((len % 2) == 0, NULL);
opos = buf = g_malloc0 ((len / 2) + 1);
for (i = 0; i < len; i += 2) {
a = utils_hex2byte (ipos);
if (a < 0) {
g_free (buf);
return NULL;
}
*opos++ = a;
ipos += 2;
}
*out_len = len / 2;
return buf;
}
/* End from hostap */
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