tsiry-sandratraina.com
A modern Music Player Daemon based on Rockbox open source high quality audio player
libadwaita
audio
rust
zig
deno
mpris
rockbox
mpd
1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 *
9 * Copyright (C) 2022 by Aidan MacDonald
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version 2
14 * of the License, or (at your option) any later version.
15 *
16 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
17 * KIND, either express or implied.
18 *
19 ****************************************************************************/
20
21#include "bootdata.h"
22#include "crc32.h"
23#include <stddef.h>
24
25#ifdef BOOTLOADER
26# error "not to be included in bootloader builds"
27#endif
28
29bool boot_data_valid;
30
31static bool verify_boot_data_v0(void) INIT_ATTR;
32static bool verify_boot_data_v0(void)
33{
34 /* validate protocol version */
35 if (boot_data.version != 0)
36 return false;
37
38 /* validate length */
39 if (boot_data.length != 4)
40 return false;
41
42 return true;
43}
44
45static bool verify_boot_data_v1(void) INIT_ATTR;
46static bool verify_boot_data_v1(void)
47{
48 /* validate protocol version */
49 if (boot_data.version != 1)
50 return false;
51
52 /* validate length */
53 if (boot_data.length != 4)
54 return false;
55
56 return true;
57}
58
59struct verify_bd_entry
60{
61 int version;
62 bool (*verify) (void);
63};
64
65static const struct verify_bd_entry verify_bd[] INITDATA_ATTR = {
66 { 0, verify_boot_data_v0 },
67 { 1, verify_boot_data_v1 },
68};
69
70void verify_boot_data(void)
71{
72 /* verify payload with checksum - all protocol versions */
73 uint32_t crc = crc_32(boot_data.payload, boot_data.length, 0xffffffff);
74 if (crc != boot_data.crc)
75 return;
76
77 /* apply verification specific to the protocol version */
78 for (size_t i = 0; i < ARRAYLEN(verify_bd); ++i)
79 {
80 const struct verify_bd_entry *e = &verify_bd[i];
81 if (e->version == boot_data.version)
82 {
83 if (e->verify())
84 boot_data_valid = true;
85
86 return;
87 }
88 }
89}