139beb93cSSam Leffler /* 239beb93cSSam Leffler * Universally Unique IDentifier (UUID) 339beb93cSSam Leffler * Copyright (c) 2008, Jouni Malinen <j@w1.fi> 439beb93cSSam Leffler * 539beb93cSSam Leffler * This program is free software; you can redistribute it and/or modify 639beb93cSSam Leffler * it under the terms of the GNU General Public License version 2 as 739beb93cSSam Leffler * published by the Free Software Foundation. 839beb93cSSam Leffler * 939beb93cSSam Leffler * Alternatively, this software may be distributed under the terms of BSD 1039beb93cSSam Leffler * license. 1139beb93cSSam Leffler * 1239beb93cSSam Leffler * See README and COPYING for more details. 1339beb93cSSam Leffler */ 1439beb93cSSam Leffler 1539beb93cSSam Leffler #include "includes.h" 1639beb93cSSam Leffler 1739beb93cSSam Leffler #include "common.h" 1839beb93cSSam Leffler #include "crypto.h" 1939beb93cSSam Leffler #include "sha1.h" 2039beb93cSSam Leffler #include "uuid.h" 2139beb93cSSam Leffler 2239beb93cSSam Leffler int uuid_str2bin(const char *str, u8 *bin) 2339beb93cSSam Leffler { 2439beb93cSSam Leffler const char *pos; 2539beb93cSSam Leffler u8 *opos; 2639beb93cSSam Leffler 2739beb93cSSam Leffler pos = str; 2839beb93cSSam Leffler opos = bin; 2939beb93cSSam Leffler 3039beb93cSSam Leffler if (hexstr2bin(pos, opos, 4)) 3139beb93cSSam Leffler return -1; 3239beb93cSSam Leffler pos += 8; 3339beb93cSSam Leffler opos += 4; 3439beb93cSSam Leffler 3539beb93cSSam Leffler if (*pos++ != '-' || hexstr2bin(pos, opos, 2)) 3639beb93cSSam Leffler return -1; 3739beb93cSSam Leffler pos += 4; 3839beb93cSSam Leffler opos += 2; 3939beb93cSSam Leffler 4039beb93cSSam Leffler if (*pos++ != '-' || hexstr2bin(pos, opos, 2)) 4139beb93cSSam Leffler return -1; 4239beb93cSSam Leffler pos += 4; 4339beb93cSSam Leffler opos += 2; 4439beb93cSSam Leffler 4539beb93cSSam Leffler if (*pos++ != '-' || hexstr2bin(pos, opos, 2)) 4639beb93cSSam Leffler return -1; 4739beb93cSSam Leffler pos += 4; 4839beb93cSSam Leffler opos += 2; 4939beb93cSSam Leffler 5039beb93cSSam Leffler if (*pos++ != '-' || hexstr2bin(pos, opos, 6)) 5139beb93cSSam Leffler return -1; 5239beb93cSSam Leffler 5339beb93cSSam Leffler return 0; 5439beb93cSSam Leffler } 5539beb93cSSam Leffler 5639beb93cSSam Leffler 5739beb93cSSam Leffler int uuid_bin2str(const u8 *bin, char *str, size_t max_len) 5839beb93cSSam Leffler { 5939beb93cSSam Leffler int len; 6039beb93cSSam Leffler len = os_snprintf(str, max_len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-" 6139beb93cSSam Leffler "%02x%02x-%02x%02x%02x%02x%02x%02x", 6239beb93cSSam Leffler bin[0], bin[1], bin[2], bin[3], 6339beb93cSSam Leffler bin[4], bin[5], bin[6], bin[7], 6439beb93cSSam Leffler bin[8], bin[9], bin[10], bin[11], 6539beb93cSSam Leffler bin[12], bin[13], bin[14], bin[15]); 6639beb93cSSam Leffler if (len < 0 || (size_t) len >= max_len) 6739beb93cSSam Leffler return -1; 6839beb93cSSam Leffler return 0; 6939beb93cSSam Leffler } 7039beb93cSSam Leffler 7139beb93cSSam Leffler 7239beb93cSSam Leffler int is_nil_uuid(const u8 *uuid) 7339beb93cSSam Leffler { 7439beb93cSSam Leffler int i; 7539beb93cSSam Leffler for (i = 0; i < UUID_LEN; i++) 7639beb93cSSam Leffler if (uuid[i]) 7739beb93cSSam Leffler return 0; 7839beb93cSSam Leffler return 1; 7939beb93cSSam Leffler } 8039beb93cSSam Leffler 8139beb93cSSam Leffler 8239beb93cSSam Leffler void uuid_gen_mac_addr(const u8 *mac_addr, u8 *uuid) 8339beb93cSSam Leffler { 8439beb93cSSam Leffler const u8 *addr[2]; 8539beb93cSSam Leffler size_t len[2]; 8639beb93cSSam Leffler u8 hash[SHA1_MAC_LEN]; 8739beb93cSSam Leffler u8 nsid[16] = { 8839beb93cSSam Leffler 0x52, 0x64, 0x80, 0xf8, 8939beb93cSSam Leffler 0xc9, 0x9b, 9039beb93cSSam Leffler 0x4b, 0xe5, 9139beb93cSSam Leffler 0xa6, 0x55, 9239beb93cSSam Leffler 0x58, 0xed, 0x5f, 0x5d, 0x60, 0x84 9339beb93cSSam Leffler }; 9439beb93cSSam Leffler 9539beb93cSSam Leffler addr[0] = nsid; 9639beb93cSSam Leffler len[0] = sizeof(nsid); 9739beb93cSSam Leffler addr[1] = mac_addr; 9839beb93cSSam Leffler len[1] = 6; 9939beb93cSSam Leffler sha1_vector(2, addr, len, hash); 10039beb93cSSam Leffler os_memcpy(uuid, hash, 16); 10139beb93cSSam Leffler 10239beb93cSSam Leffler /* Version: 5 = named-based version using SHA-1 */ 10339beb93cSSam Leffler uuid[6] = (5 << 4) | (uuid[6] & 0x0f); 10439beb93cSSam Leffler 10539beb93cSSam Leffler /* Variant specified in RFC 4122 */ 10639beb93cSSam Leffler uuid[8] = 0x80 | (uuid[8] & 0x3f); 10739beb93cSSam Leffler } 108