2 * Universally Unique IDentifier (UUID)
3 * Copyright (c) 2008, Jouni Malinen <j@w1.fi>
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.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
22 int uuid_str2bin(const char *str, u8 *bin)
30 if (hexstr2bin(pos, opos, 4))
35 if (*pos++ != '-' || hexstr2bin(pos, opos, 2))
40 if (*pos++ != '-' || hexstr2bin(pos, opos, 2))
45 if (*pos++ != '-' || hexstr2bin(pos, opos, 2))
50 if (*pos++ != '-' || hexstr2bin(pos, opos, 6))
57 int uuid_bin2str(const u8 *bin, char *str, size_t max_len)
60 len = os_snprintf(str, max_len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
61 "%02x%02x-%02x%02x%02x%02x%02x%02x",
62 bin[0], bin[1], bin[2], bin[3],
63 bin[4], bin[5], bin[6], bin[7],
64 bin[8], bin[9], bin[10], bin[11],
65 bin[12], bin[13], bin[14], bin[15]);
66 if (len < 0 || (size_t) len >= max_len)
72 int is_nil_uuid(const u8 *uuid)
75 for (i = 0; i < UUID_LEN; i++)
82 void uuid_gen_mac_addr(const u8 *mac_addr, u8 *uuid)
86 u8 hash[SHA1_MAC_LEN];
88 0x52, 0x64, 0x80, 0xf8,
92 0x58, 0xed, 0x5f, 0x5d, 0x60, 0x84
96 len[0] = sizeof(nsid);
99 sha1_vector(2, addr, len, hash);
100 os_memcpy(uuid, hash, 16);
102 /* Version: 5 = named-based version using SHA-1 */
103 uuid[6] = (5 << 4) | (uuid[6] & 0x0f);
105 /* Variant specified in RFC 4122 */
106 uuid[8] = 0x80 | (uuid[8] & 0x3f);