1// Copyright 2017 The Fuchsia Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include <stdio.h>
6#include <string.h>
7
8#include "device_id.h"
9#include "eff_short_wordlist_1.h"
10
11#define APPEND_WORD(NUM, SEP)                            \
12    word = dictionary[(NUM) % DICEWARE_DICTIONARY_SIZE]; \
13    memcpy(dest, word, strlen(word));                    \
14    dest += strlen(word);                                \
15    *dest = SEP;                                         \
16    dest++;
17
18void device_id_get(unsigned char mac[6], char out[DEVICE_ID_MAX]) {
19    const char* word;
20    char* dest = out;
21    APPEND_WORD(mac[0] | ((mac[4] << 8) & 0xF00), '-');
22    APPEND_WORD(mac[1] | ((mac[5] << 8) & 0xF00), '-');
23    APPEND_WORD(mac[2] | ((mac[4] << 4) & 0xF00), '-');
24    APPEND_WORD(mac[3] | ((mac[5] << 4) & 0xF00), 0);
25}
26