Add mg3d & Fix Bugs
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.gitignore
vendored
7
.gitignore
vendored
@ -20,3 +20,10 @@ yarn-error.log*
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*.njsproj
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*.sln
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*.sw?
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/src/KgmWasm/build
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/src/KgmWasm/build
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/src/KgmWasm/*.js
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/src/KgmWasm/*.wasm
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/src/QmcWasm/*.js
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/src/QmcWasm/*.wasm
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@ -1,3 +1,4 @@
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import { Decrypt as Mg3dDecrypt } from '@/decrypt/mg3d';
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import { Decrypt as NcmDecrypt } from '@/decrypt/ncm';
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import { Decrypt as NcmCacheDecrypt } from '@/decrypt/ncmcache';
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import { Decrypt as XmDecrypt } from '@/decrypt/xm';
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@ -22,6 +23,9 @@ export async function Decrypt(file: FileInfo, config: Record<string, any>): Prom
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const raw = SplitFilename(file.name);
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let rt_data: DecryptResult;
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switch (raw.ext) {
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case 'mg3d': // Migu Wav
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rt_data = await Mg3dDecrypt(file.raw, raw.name);
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break;
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case 'ncm': // Netease Mp3/Flac
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rt_data = await NcmDecrypt(file.raw, raw.name, raw.ext);
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break;
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@ -63,7 +63,7 @@ export async function Decrypt(file: File, raw_filename: string, raw_ext: string)
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const mime = AudioMimeType[ext];
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let musicBlob = new Blob([musicDecoded], { type: mime });
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const musicMeta = await metaParseBlob(musicBlob);
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const { title, artist } = GetMetaFromFile(raw_filename, musicMeta.common.title, musicMeta.common.artists == undefined ? musicMeta.common.artist : musicMeta.common.artists.toString());
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const { title, artist } = GetMetaFromFile(raw_filename, musicMeta.common.title, String(musicMeta.common.artists || musicMeta.common.artist || ""));
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return {
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album: musicMeta.common.album,
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picture: GetCoverFromFile(musicMeta),
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@ -38,7 +38,7 @@ export async function Decrypt(file: File, raw_filename: string, _: string): Prom
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let musicBlob = new Blob([audioData], { type: mime });
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const musicMeta = await metaParseBlob(musicBlob);
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const { title, artist } = GetMetaFromFile(raw_filename, musicMeta.common.title, musicMeta.common.artists == undefined ? musicMeta.common.artist : musicMeta.common.artists.toString());
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const { title, artist } = GetMetaFromFile(raw_filename, musicMeta.common.title, String(musicMeta.common.artists || musicMeta.common.artist || ""));
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return {
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album: musicMeta.common.album,
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picture: GetCoverFromFile(musicMeta),
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71
src/decrypt/mg3d.ts
Normal file
71
src/decrypt/mg3d.ts
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@ -0,0 +1,71 @@
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import { Decrypt as RawDecrypt } from './raw';
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import { GetArrayBuffer } from '@/decrypt/utils';
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import { DecryptResult } from '@/decrypt/entity';
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const segmentSize = 0x20;
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function isPrintableAsciiChar(ch: number) {
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return ch >= 0x20 && ch <= 0x7E;
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}
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function isUpperHexChar(ch: number) {
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return (ch >= 0x30 && ch <= 0x39) || (ch >= 0x41 && ch <= 0x46);
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}
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/**
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* @param {Buffer} data
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* @param {Buffer} key
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* @param {boolean} copy
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* @returns Buffer
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*/
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function decryptSegment(data: Uint8Array, key: Uint8Array) {
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for (let i = 0; i < data.byteLength; i++) {
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data[i] -= key[i % segmentSize];
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}
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return Buffer.from(data);
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}
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export async function Decrypt(file: File, raw_filename: string): Promise<DecryptResult> {
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const buf = new Uint8Array(await GetArrayBuffer(file));
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// 咪咕编码的 WAV 文件有很多“空洞”内容,尝试密钥。
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const header = buf.slice(0, 0x100);
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const bytesRIFF = Buffer.from('RIFF', 'ascii');
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const bytesWaveFormat = Buffer.from('WAVEfmt ', 'ascii');
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const possibleKeys = [];
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for (let i = segmentSize; i < segmentSize * 20; i += segmentSize) {
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const possibleKey = buf.slice(i, i + segmentSize);
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if (!possibleKey.every(isUpperHexChar)) continue;
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const tempHeader = decryptSegment(header, possibleKey);
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if (tempHeader.slice(0, 4).compare(bytesRIFF)) continue;
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if (tempHeader.slice(8, 16).compare(bytesWaveFormat)) continue;
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// fmt chunk 大小可以是 16 / 18 / 40。
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const fmtChunkSize = tempHeader.readUInt32LE(0x10);
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if (![16, 18, 40].includes(fmtChunkSize)) continue;
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// 下一个 chunk
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const firstDataChunkOffset = 0x14 + fmtChunkSize;
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const chunkName = tempHeader.slice(firstDataChunkOffset, firstDataChunkOffset + 4);
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if (!chunkName.every(isPrintableAsciiChar)) continue;
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const secondDataChunkOffset = firstDataChunkOffset + 8 + tempHeader.readUInt32LE(firstDataChunkOffset + 4);
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if (secondDataChunkOffset <= header.byteLength) {
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const secondChunkName = tempHeader.slice(secondDataChunkOffset, secondDataChunkOffset + 4);
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if (!secondChunkName.every(isPrintableAsciiChar)) continue;
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}
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possibleKeys.push(Buffer.from(possibleKey).toString('ascii'));
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}
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if (possibleKeys.length <= 0) {
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throw new Error(`ERROR: no suitable key discovered`);
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}
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const decryptionKey = Buffer.from(possibleKeys[0], 'ascii');
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decryptSegment(buf, decryptionKey);
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const musicData = new Blob([buf], { type: 'audio/x-wav' });
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return await RawDecrypt(musicData, raw_filename, 'wav', false);
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}
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@ -13,7 +13,7 @@ export async function Decrypt(file: Blob, raw_filename: string, raw_ext: string)
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const ext = SniffAudioExt(buffer, raw_ext);
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if (ext !== raw_ext) file = new Blob([buffer], { type: AudioMimeType[ext] });
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const tag = await metaParseBlob(file);
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const { title, artist } = GetMetaFromFile(raw_filename, tag.common.title, tag.common.artists == undefined ? tag.common.artist : tag.common.artists.toString());
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const { title, artist } = GetMetaFromFile(raw_filename, tag.common.title, String(tag.common.artists || tag.common.artist || ""));
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return {
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title,
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@ -54,7 +54,7 @@ export async function Decrypt(file: Blob, raw_filename: string, raw_ext: string)
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throw '不支持的QQ音乐缓存格式';
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}
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const tag = await metaParseBlob(audioBlob);
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const { title, artist } = GetMetaFromFile(raw_filename, tag.common.title, String(tag.common.artists || tag.common.artist));
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const { title, artist } = GetMetaFromFile(raw_filename, tag.common.title, String(tag.common.artists || tag.common.artist || ""));
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return {
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title,
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@ -17,7 +17,7 @@ export async function Decrypt(
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if (ext !== raw_ext) file = new Blob([buffer], { type: AudioMimeType[ext] });
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}
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const tag = await metaParseBlob(file);
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const { title, artist } = GetMetaFromFile(raw_filename, tag.common.title, String(tag.common.artists || tag.common.artist));
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const { title, artist } = GetMetaFromFile(raw_filename, tag.common.title, String(tag.common.artists || tag.common.artist || ''));
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return {
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title,
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@ -49,7 +49,7 @@ export async function Decrypt(file: File, raw_filename: string, raw_ext: string)
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const { title, artist } = GetMetaFromFile(
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raw_filename,
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musicMeta.common.title,
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String(musicMeta.common.artists || musicMeta.common.artist),
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String(musicMeta.common.artists || musicMeta.common.artist || ""),
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raw_filename.indexOf('_') === -1 ? '-' : '_',
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);
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@ -20,6 +20,8 @@ interface MetaResult {
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blob: Blob;
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}
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const fromGBK = (text?: string) => iconv.decode(new Buffer(text || ''), 'gbk');
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/**
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*
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* @param musicBlob 音乐文件(解密后)
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@ -41,14 +43,13 @@ export async function extractQQMusicMeta(
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console.warn('try using gbk encoding to decode meta');
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musicMeta.common.artist = '';
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if (!musicMeta.common.artists) {
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musicMeta.common.artist = iconv.decode(new Buffer(musicMeta.common.artist ?? ''), 'gbk');
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musicMeta.common.artist = fromGBK(musicMeta.common.artist);
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}
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else {
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musicMeta.common.artists.forEach((artist) => artist = iconv.decode(new Buffer(artist ?? ''), 'gbk'));
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musicMeta.common.artist = musicMeta.common.artists.toString();
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musicMeta.common.artist = musicMeta.common.artists.map(fromGBK).join();
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}
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musicMeta.common.title = iconv.decode(new Buffer(musicMeta.common.title ?? ''), 'gbk');
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musicMeta.common.album = iconv.decode(new Buffer(musicMeta.common.album ?? ''), 'gbk');
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musicMeta.common.title = fromGBK(musicMeta.common.title);
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musicMeta.common.album = fromGBK(musicMeta.common.album);
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}
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}
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