mirror of
https://codeberg.org/Freeyourgadget/Gadgetbridge
synced 2024-06-30 00:36:26 +02:00
257 lines
9.0 KiB
Java
257 lines
9.0 KiB
Java
/* Copyright (C) 2017-2020 Andreas Shimokawa
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This file is part of Gadgetbridge.
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Gadgetbridge is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published
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by the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Gadgetbridge is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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package nodomain.freeyourgadget.gadgetbridge.service.devices.huami;
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import java.nio.ByteBuffer;
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import java.nio.ByteOrder;
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import java.util.Map;
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import nodomain.freeyourgadget.gadgetbridge.impl.GBDevice;
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import nodomain.freeyourgadget.gadgetbridge.util.ArrayUtils;
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import nodomain.freeyourgadget.gadgetbridge.util.CheckSums;
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public abstract class HuamiFirmwareInfo {
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protected static final byte[] RES_HEADER = new byte[]{ // HMRES resources file (*.res)
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0x48, 0x4d, 0x52, 0x45, 0x53
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};
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protected static final byte[] NEWRES_HEADER = new byte[]{ // NERES resources file (*.res)
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0x4e, 0x45, 0x52, 0x45, 0x53
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};
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protected static final byte[] WATCHFACE_HEADER = new byte[]{
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0x48, 0x4d, 0x44, 0x49, 0x41, 0x4c
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};
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protected static final byte[] FT_HEADER = new byte[]{ // HMZK font file (*.ft, *.ft.xx)
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0x48, 0x4d, 0x5a, 0x4b
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};
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protected static final byte[] NEWFT_HEADER = new byte[]{ // NEZK font file (*.ft, *.ft.xx)
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0x4e, 0x45, 0x5a, 0x4b
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};
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public static final byte[] GPS_ALMANAC_HEADER = new byte[]{ // probably wrong
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(byte) 0xa0, (byte) 0x80, 0x08, 0x00, (byte) 0x8b
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};
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public static final byte[] GPS_CEP_HEADER = new byte[]{ // probably wrong
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0x2a, 0x12, (byte) 0xa0, 0x02
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};
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// gps detection is totally bogus, just the first 16 bytes
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protected static final byte[][] GPS_HEADERS = {
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new byte[]{
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(byte) 0xcb, 0x51, (byte) 0xc1, 0x30, 0x41, (byte) 0x9e, 0x5e, (byte) 0xd3,
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0x51, 0x35, (byte) 0xdf, 0x66, (byte) 0xed, (byte) 0xd9, 0x5f, (byte) 0xa7
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},
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new byte[]{
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0x10, 0x50, 0x26, 0x76, (byte) 0x8f, 0x4a, (byte) 0xa1, 0x49,
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(byte) 0xa7, 0x26, (byte) 0xd0, (byte) 0xe6, 0x4a, 0x21, (byte) 0x88, (byte) 0xd4
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},
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new byte[]{
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(byte) 0xeb, (byte) 0xfa, (byte) 0xc5, (byte) 0x89, (byte) 0xf0, 0x5c, 0x2e, (byte) 0xcc,
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(byte) 0xfa, (byte) 0xf3, 0x62, (byte) 0xeb, (byte) 0x92, (byte) 0xc6, (byte) 0xa1, (byte) 0xbb
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},
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new byte[]{
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0x0b, 0x61, 0x53, (byte) 0xed, (byte) 0x83, (byte) 0xac, 0x07, 0x21,
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(byte) 0x8c, 0x36, 0x2e, (byte) 0x8c, (byte) 0x9c, 0x08, 0x54, (byte) 0xa6
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},
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new byte[]{
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(byte) 0xec, 0x51, 0x73, 0x22, 0x60, 0x02, 0x14, (byte) 0xb7,
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(byte) 0xb5, (byte) 0xea, 0x4b, 0x22, 0x5d, 0x23, (byte) 0xe5, 0x4f
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},
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new byte[]{
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0x73, 0x75, 0x68, (byte) 0xd0, 0x70, 0x73, (byte) 0xbb, 0x5a,
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0x3e, (byte) 0xc3, (byte) 0xd3, 0x09, (byte) 0x9e, 0x1d, (byte) 0xd3, (byte) 0xc9
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},
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new byte[]{
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0x00, 0x00, 0x00, 0x01, 0x00, 0x09, 0x6F, (byte) 0xD0,
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0x00, 0x01, 0x00, 0x02, 0x3D, (byte) 0xE0, 0x00, 0x69
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},
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new byte[]{
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0x00, 0x00, 0x00, 0x01, 0x00, 0x09, 0x32, 0x70,
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0x00, 0x01, 0x00, 0x02, 0x3D, (byte) 0xE0, 0x00, (byte) 0xCC
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}
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};
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protected static final int FONT_TYPE_OFFSET = 0x9;
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protected static final int COMPRESSED_RES_HEADER_OFFSET = 0x9;
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protected static final int COMPRESSED_RES_HEADER_OFFSET_NEW = 0xd;
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private HuamiFirmwareType firmwareType;
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public String toVersion(int crc16) {
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String version = getCrcMap().get(crc16);
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if (version == null) {
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switch (firmwareType) {
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case FIRMWARE:
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version = searchFirmwareVersion(bytes);
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break;
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case RES:
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version = "RES " + bytes[5];
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break;
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case RES_COMPRESSED:
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byte versionByte;
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// there are two possible locations of the version for compressed res, probe the format in a dirty way :P
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if (bytes[COMPRESSED_RES_HEADER_OFFSET + 2] == 0x52 &&
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bytes[COMPRESSED_RES_HEADER_OFFSET + 3] == 0x45 &&
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bytes[COMPRESSED_RES_HEADER_OFFSET + 4] == 0x53) {
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versionByte = bytes[14];
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} else {
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versionByte = bytes[18];
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}
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version = "RES " + (versionByte & 0xff);
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break;
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case FONT:
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version = "FONT " + bytes[4];
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break;
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case FONT_LATIN:
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version = "FONT LATIN " + bytes[4];
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break;
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}
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}
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if (version == null) {
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switch (firmwareType) {
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case FIRMWARE:
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version = "(unknown)";
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break;
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case FONT:
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case FONT_LATIN:
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version = "(unknown font)";
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break;
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case GPS:
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version = "(unknown GPS)";
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break;
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case GPS_CEP:
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version = "(unknown CEP)";
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break;
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case GPS_ALMANAC:
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version = "(unknown ALM)";
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break;
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case WATCHFACE:
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version = "(unknown watchface)";
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break;
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}
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}
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return version;
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}
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public int[] getWhitelistedVersions() {
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return ArrayUtils.toIntArray(getCrcMap().keySet());
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}
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private final int crc16;
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private final int crc32;
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private byte[] bytes;
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public HuamiFirmwareInfo(byte[] bytes) {
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this.bytes = bytes;
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crc16 = CheckSums.getCRC16(bytes);
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crc32 = CheckSums.getCRC32(bytes);
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firmwareType = determineFirmwareType(bytes);
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}
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public abstract boolean isGenerallyCompatibleWith(GBDevice device);
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public boolean isHeaderValid() {
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return getFirmwareType() != HuamiFirmwareType.INVALID;
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}
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public void checkValid() throws IllegalArgumentException {
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}
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/**
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* @return the size of the firmware in number of bytes.
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*/
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public int getSize() {
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return bytes.length;
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}
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public byte[] getBytes() {
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return bytes;
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}
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public int getCrc16() {
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return crc16;
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}
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public int getCrc32() {
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return crc32;
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}
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public int getFirmwareVersion() {
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return getCrc16(); // HACK until we know how to determine the version from the fw bytes
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}
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public HuamiFirmwareType getFirmwareType() {
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return firmwareType;
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}
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protected abstract Map<Integer, String> getCrcMap();
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protected abstract HuamiFirmwareType determineFirmwareType(byte[] bytes);
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protected String searchFirmwareVersion(byte[] fwbytes) {
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ByteBuffer buf = ByteBuffer.wrap(fwbytes);
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buf.order(ByteOrder.BIG_ENDIAN);
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while (buf.remaining() > 3) {
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int word = buf.getInt();
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if (word == 0x5625642e) {
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word = buf.getInt();
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if (word == 0x25642e25) {
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word = buf.getInt();
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if (word == 0x642e2564) {
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word = buf.getInt();
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if (word == 0x00000000) {
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byte[] version = new byte[8];
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buf.get(version);
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return new String(version);
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}
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}
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}
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}
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}
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return null;
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}
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protected boolean searchString32BitAligned(byte[] fwbytes, String findString) {
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ByteBuffer stringBuf = ByteBuffer.wrap((findString + "\0").getBytes());
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stringBuf.order(ByteOrder.BIG_ENDIAN);
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int[] findArray = new int[stringBuf.remaining() / 4];
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for (int i = 0; i < findArray.length; i++) {
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findArray[i] = stringBuf.getInt();
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}
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ByteBuffer buf = ByteBuffer.wrap(fwbytes);
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buf.order(ByteOrder.BIG_ENDIAN);
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while (buf.remaining() > 3) {
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int arrayPos = 0;
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while (arrayPos < findArray.length && buf.remaining() > 3 && (buf.getInt() == findArray[arrayPos])) {
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arrayPos++;
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}
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if (arrayPos == findArray.length) {
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return true;
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}
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}
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return false;
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}
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}
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