src/utils/uuid.c

   1 /*
   2  * Universally Unique IDentifier (UUID)
   3  * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "uuid.h"
  19
  20 int uuid_str2bin(const char *str, u8 *bin)
  21 {
  22         const char *pos;
  23         u8 *opos;
  24
  25         pos = str;
  26         opos = bin;
  27
  28         if (hexstr2bin(pos, opos, 4))
  29                 return -1;
  30         pos += 8;
  31         opos += 4;
  32
  33         if (*pos++ != '-' || hexstr2bin(pos, opos, 2))
  34                 return -1;
  35         pos += 4;
  36         opos += 2;
  37
  38         if (*pos++ != '-' || hexstr2bin(pos, opos, 2))
  39                 return -1;
  40         pos += 4;
  41         opos += 2;
  42
  43         if (*pos++ != '-' || hexstr2bin(pos, opos, 2))
  44                 return -1;
  45         pos += 4;
  46         opos += 2;
  47
  48         if (*pos++ != '-' || hexstr2bin(pos, opos, 6))
  49                 return -1;
  50
  51         return 0;
  52 }
  53
  54
  55 int uuid_bin2str(const u8 *bin, char *str, size_t max_len)
  56 {
  57         int len;
  58         len = os_snprintf(str, max_len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
  59                           "%02x%02x-%02x%02x%02x%02x%02x%02x",
  60                           bin[0], bin[1], bin[2], bin[3],
  61                           bin[4], bin[5], bin[6], bin[7],
  62                           bin[8], bin[9], bin[10], bin[11],
  63                           bin[12], bin[13], bin[14], bin[15]);
  64         if (len < 0 || (size_t) len >= max_len)
  65                 return -1;
  66         return 0;
  67 }
  68
  69
  70 int is_nil_uuid(const u8 *uuid)
  71 {
  72         int i;
  73         for (i = 0; i < UUID_LEN; i++)
  74                 if (uuid[i])
  75                         return 0;
  76         return 1;
  77 }