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all: format with prettier

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This commit is contained in:
MengYX
2021-12-18 21:55:31 +08:00
parent 559be402c9
commit cad5b4d7de
32 changed files with 1421 additions and 1466 deletions
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136
src/decrypt/common.ts
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@@ -1,73 +1,71 @@
import {Decrypt as XmDecrypt} from "@/decrypt/xm";
import {Decrypt as QmcDecrypt} from "@/decrypt/qmc";
import {Decrypt as QmcCacheDecrypt} from "@/decrypt/qmccache";
import {Decrypt as KgmDecrypt} from "@/decrypt/kgm";
import {Decrypt as KwmDecrypt} from "@/decrypt/kwm";
import {Decrypt as RawDecrypt} from "@/decrypt/raw";
import {Decrypt as TmDecrypt} from "@/decrypt/tm";
import {DecryptResult, FileInfo} from "@/decrypt/entity";
import {SplitFilename} from "@/decrypt/utils";
import { Decrypt as XmDecrypt } from '@/decrypt/xm';
import { Decrypt as QmcDecrypt } from '@/decrypt/qmc';
import { Decrypt as QmcCacheDecrypt } from '@/decrypt/qmccache';
import { Decrypt as KgmDecrypt } from '@/decrypt/kgm';
import { Decrypt as KwmDecrypt } from '@/decrypt/kwm';
import { Decrypt as RawDecrypt } from '@/decrypt/raw';
import { Decrypt as TmDecrypt } from '@/decrypt/tm';
import { DecryptResult, FileInfo } from '@/decrypt/entity';
import { SplitFilename } from '@/decrypt/utils';
export async function CommonDecrypt(file: FileInfo): Promise<DecryptResult> {
const raw = SplitFilename(file.name)
let rt_data: DecryptResult;
switch (raw.ext) {
case "kwm":// Kuwo Mp3/Flac
rt_data = await KwmDecrypt(file.raw, raw.name, raw.ext);
break
case "xm": // Xiami Wav/M4a/Mp3/Flac
case "wav":// Xiami/Raw Wav
case "mp3":// Xiami/Raw Mp3
case "flac":// Xiami/Raw Flac
case "m4a":// Xiami/Raw M4a
rt_data = await XmDecrypt(file.raw, raw.name, raw.ext);
break;
case "ogg":// Raw Ogg
rt_data = await RawDecrypt(file.raw, raw.name, raw.ext);
break;
case "tm0":// QQ Music IOS Mp3
case "tm3":// QQ Music IOS Mp3
rt_data = await RawDecrypt(file.raw, raw.name, "mp3");
break;
case "qmc3"://QQ Music Android Mp3
case "qmc2"://QQ Music Android Ogg
case "qmc0"://QQ Music Android Mp3
case "qmcflac"://QQ Music Android Flac
case "qmcogg"://QQ Music Android Ogg
case "tkm"://QQ Music Accompaniment M4a
case "bkcmp3"://Moo Music Mp3
case "bkcflac"://Moo Music Flac
case "mflac"://QQ Music New Flac
case "mflac0"://QQ Music New Flac
case "mgg": //QQ Music New Ogg
case "mgg1": //QQ Music New Ogg
case "666c6163"://QQ Music Weiyun Flac
case "6d7033"://QQ Music Weiyun Mp3
case "6f6767"://QQ Music Weiyun Ogg
case "6d3461"://QQ Music Weiyun M4a
case "776176"://QQ Music Weiyun Wav
rt_data = await QmcDecrypt(file.raw, raw.name, raw.ext);
break;
case "tm2":// QQ Music IOS M4a
case "tm6":// QQ Music IOS M4a
rt_data = await TmDecrypt(file.raw, raw.name);
break;
case "cache"://QQ Music Cache
rt_data = await QmcCacheDecrypt(file.raw, raw.name, raw.ext);
break;
case "vpr":
case "kgm":
case "kgma":
rt_data = await KgmDecrypt(file.raw, raw.name, raw.ext);
break
default:
throw "不支持此文件格式"
}
const raw = SplitFilename(file.name);
let rt_data: DecryptResult;
switch (raw.ext) {
case 'kwm': // Kuwo Mp3/Flac
rt_data = await KwmDecrypt(file.raw, raw.name, raw.ext);
break;
case 'xm': // Xiami Wav/M4a/Mp3/Flac
case 'wav': // Xiami/Raw Wav
case 'mp3': // Xiami/Raw Mp3
case 'flac': // Xiami/Raw Flac
case 'm4a': // Xiami/Raw M4a
rt_data = await XmDecrypt(file.raw, raw.name, raw.ext);
break;
case 'ogg': // Raw Ogg
rt_data = await RawDecrypt(file.raw, raw.name, raw.ext);
break;
case 'tm0': // QQ Music IOS Mp3
case 'tm3': // QQ Music IOS Mp3
rt_data = await RawDecrypt(file.raw, raw.name, 'mp3');
break;
case 'qmc3': //QQ Music Android Mp3
case 'qmc2': //QQ Music Android Ogg
case 'qmc0': //QQ Music Android Mp3
case 'qmcflac': //QQ Music Android Flac
case 'qmcogg': //QQ Music Android Ogg
case 'tkm': //QQ Music Accompaniment M4a
case 'bkcmp3': //Moo Music Mp3
case 'bkcflac': //Moo Music Flac
case 'mflac': //QQ Music New Flac
case 'mflac0': //QQ Music New Flac
case 'mgg': //QQ Music New Ogg
case 'mgg1': //QQ Music New Ogg
case '666c6163': //QQ Music Weiyun Flac
case '6d7033': //QQ Music Weiyun Mp3
case '6f6767': //QQ Music Weiyun Ogg
case '6d3461': //QQ Music Weiyun M4a
case '776176': //QQ Music Weiyun Wav
rt_data = await QmcDecrypt(file.raw, raw.name, raw.ext);
break;
case 'tm2': // QQ Music IOS M4a
case 'tm6': // QQ Music IOS M4a
rt_data = await TmDecrypt(file.raw, raw.name);
break;
case 'cache': //QQ Music Cache
rt_data = await QmcCacheDecrypt(file.raw, raw.name, raw.ext);
break;
case 'vpr':
case 'kgm':
case 'kgma':
rt_data = await KgmDecrypt(file.raw, raw.name, raw.ext);
break;
default:
throw '不支持此文件格式';
}
if (!rt_data.rawExt) rt_data.rawExt = raw.ext;
if (!rt_data.rawFilename) rt_data.rawFilename = raw.name;
console.log(rt_data);
return rt_data;
if (!rt_data.rawExt) rt_data.rawExt = raw.ext;
if (!rt_data.rawFilename) rt_data.rawFilename = raw.name;
console.log(rt_data);
return rt_data;
}

35
src/decrypt/entity.ts
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@@ -1,26 +1,25 @@
export interface DecryptResult {
title: string
album?: string
artist?: string
title: string;
album?: string;
artist?: string;
mime: string
ext: string
mime: string;
ext: string;
file: string
blob: Blob
picture?: string
message?: string
rawExt?: string
rawFilename?: string
file: string;
blob: Blob;
picture?: string;
message?: string;
rawExt?: string;
rawFilename?: string;
}
export interface FileInfo {
status: string
name: string,
size: number,
percentage: number,
uid: number,
raw: File
status: string;
name: string;
size: number;
percentage: number;
uid: number;
raw: File;
}

199
src/decrypt/kgm.ts
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@@ -1,122 +1,125 @@
import {
AudioMimeType,
BytesHasPrefix,
GetArrayBuffer,
GetCoverFromFile,
GetMetaFromFile,
SniffAudioExt
} from "@/decrypt/utils";
import {parseBlob as metaParseBlob} from "music-metadata-browser";
import {DecryptResult} from "@/decrypt/entity";
import config from "@/../package.json"
AudioMimeType,
BytesHasPrefix,
GetArrayBuffer,
GetCoverFromFile,
GetMetaFromFile,
SniffAudioExt,
} from '@/decrypt/utils';
import { parseBlob as metaParseBlob } from 'music-metadata-browser';
import { DecryptResult } from '@/decrypt/entity';
import config from '@/../package.json';
//prettier-ignore
const VprHeader = [
0x05, 0x28, 0xBC, 0x96, 0xE9, 0xE4, 0x5A, 0x43,
0x91, 0xAA, 0xBD, 0xD0, 0x7A, 0xF5, 0x36, 0x31]
0x05, 0x28, 0xBC, 0x96, 0xE9, 0xE4, 0x5A, 0x43,
0x91, 0xAA, 0xBD, 0xD0, 0x7A, 0xF5, 0x36, 0x31
]
//prettier-ignore
const KgmHeader = [
0x7C, 0xD5, 0x32, 0xEB, 0x86, 0x02, 0x7F, 0x4B,
0xA8, 0xAF, 0xA6, 0x8E, 0x0F, 0xFF, 0x99, 0x14]
0x7C, 0xD5, 0x32, 0xEB, 0x86, 0x02, 0x7F, 0x4B,
0xA8, 0xAF, 0xA6, 0x8E, 0x0F, 0xFF, 0x99, 0x14
]
//prettier-ignore
const VprMaskDiff = [
0x25, 0xDF, 0xE8, 0xA6, 0x75, 0x1E, 0x75, 0x0E,
0x2F, 0x80, 0xF3, 0x2D, 0xB8, 0xB6, 0xE3, 0x11,
0x00]
0x25, 0xDF, 0xE8, 0xA6, 0x75, 0x1E, 0x75, 0x0E,
0x2F, 0x80, 0xF3, 0x2D, 0xB8, 0xB6, 0xE3, 0x11,
0x00
]
export async function Decrypt(file: File, raw_filename: string, raw_ext: string): Promise<DecryptResult> {
const oriData = new Uint8Array(await GetArrayBuffer(file));
if (raw_ext === 'vpr') {
if (!BytesHasPrefix(oriData, VprHeader)) throw Error('Not a valid vpr file!');
} else {
if (!BytesHasPrefix(oriData, KgmHeader)) throw Error('Not a valid kgm(a) file!');
}
let bHeaderLen = new DataView(oriData.slice(0x10, 0x14).buffer);
let headerLen = bHeaderLen.getUint32(0, true);
const oriData = new Uint8Array(await GetArrayBuffer(file));
if (raw_ext === "vpr") {
if (!BytesHasPrefix(oriData, VprHeader)) throw Error("Not a valid vpr file!")
} else {
if (!BytesHasPrefix(oriData, KgmHeader)) throw Error("Not a valid kgm(a) file!")
}
let bHeaderLen = new DataView(oriData.slice(0x10, 0x14).buffer)
let headerLen = bHeaderLen.getUint32(0, true)
let audioData = oriData.slice(headerLen);
let dataLen = audioData.length;
if (audioData.byteLength > 1 << 26) {
throw Error("文件过大，请使用 <a target='_blank' href='https://github.com/unlock-music/cli'>CLI版本</a> 进行解锁");
}
let audioData = oriData.slice(headerLen)
let dataLen = audioData.length
if (audioData.byteLength > 1 << 26) {
throw Error("文件过大，请使用 <a target='_blank' href='https://github.com/unlock-music/cli'>CLI版本</a> 进行解锁")
}
let key1 = new Uint8Array(17);
key1.set(oriData.slice(0x1c, 0x2c), 0);
if (MaskV2.length === 0) {
if (!(await LoadMaskV2())) throw Error('加载Kgm/Vpr Mask数据失败');
}
let key1 = new Uint8Array(17)
key1.set(oriData.slice(0x1c, 0x2c), 0)
if (MaskV2.length === 0) {
if (!await LoadMaskV2()) throw Error("加载Kgm/Vpr Mask数据失败")
}
for (let i = 0; i < dataLen; i++) {
let med8 = key1[i % 17] ^ audioData[i];
med8 ^= (med8 & 0xf) << 4;
for (let i = 0; i < dataLen; i++) {
let med8 = key1[i % 17] ^ audioData[i]
med8 ^= (med8 & 0xf) << 4
let msk8 = GetMask(i);
msk8 ^= (msk8 & 0xf) << 4;
audioData[i] = med8 ^ msk8;
}
if (raw_ext === 'vpr') {
for (let i = 0; i < dataLen; i++) audioData[i] ^= VprMaskDiff[i % 17];
}
let msk8 = GetMask(i)
msk8 ^= (msk8 & 0xf) << 4
audioData[i] = med8 ^ msk8
}
if (raw_ext === "vpr") {
for (let i = 0; i < dataLen; i++) audioData[i] ^= VprMaskDiff[i % 17]
}
const ext = SniffAudioExt(audioData);
const mime = AudioMimeType[ext];
let musicBlob = new Blob([audioData], {type: mime});
const musicMeta = await metaParseBlob(musicBlob);
const {title, artist} = GetMetaFromFile(raw_filename, musicMeta.common.title, musicMeta.common.artist)
return {
album: musicMeta.common.album,
picture: GetCoverFromFile(musicMeta),
file: URL.createObjectURL(musicBlob),
blob: musicBlob,
ext,
mime,
title,
artist
}
const ext = SniffAudioExt(audioData);
const mime = AudioMimeType[ext];
let musicBlob = new Blob([audioData], { type: mime });
const musicMeta = await metaParseBlob(musicBlob);
const { title, artist } = GetMetaFromFile(raw_filename, musicMeta.common.title, musicMeta.common.artist);
return {
album: musicMeta.common.album,
picture: GetCoverFromFile(musicMeta),
file: URL.createObjectURL(musicBlob),
blob: musicBlob,
ext,
mime,
title,
artist,
};
}
function GetMask(pos: number) {
return MaskV2PreDef[pos % 272] ^ MaskV2[pos >> 4]
return MaskV2PreDef[pos % 272] ^ MaskV2[pos >> 4];
}
let MaskV2: Uint8Array = new Uint8Array(0);
async function LoadMaskV2(): Promise<boolean> {
let mask_url = `https://cdn.jsdelivr.net/gh/unlock-music/unlock-music@${config.version}/public/static/kgm.mask`
if (["http:", "https:"].some(v => v == self.location.protocol)) {
if (!!self.document) {// using Web Worker
mask_url = "./static/kgm.mask"
} else {// using Main thread
mask_url = "../static/kgm.mask"
}
}
try {
const resp = await fetch(mask_url, {method: "GET"})
MaskV2 = new Uint8Array(await resp.arrayBuffer());
return true
} catch (e) {
console.error(e)
return false
let mask_url = `https://cdn.jsdelivr.net/gh/unlock-music/unlock-music@${config.version}/public/static/kgm.mask`;
if (['http:', 'https:'].some((v) => v == self.location.protocol)) {
if (!!self.document) {
// using Web Worker
mask_url = './static/kgm.mask';
} else {
// using Main thread
mask_url = '../static/kgm.mask';
}
}
try {
const resp = await fetch(mask_url, { method: 'GET' });
MaskV2 = new Uint8Array(await resp.arrayBuffer());
return true;
} catch (e) {
console.error(e);
return false;
}
}
//prettier-ignore
const MaskV2PreDef = [
0xB8, 0xD5, 0x3D, 0xB2, 0xE9, 0xAF, 0x78, 0x8C, 0x83, 0x33, 0x71, 0x51, 0x76, 0xA0, 0xCD, 0x37,
0x2F, 0x3E, 0x35, 0x8D, 0xA9, 0xBE, 0x98, 0xB7, 0xE7, 0x8C, 0x22, 0xCE, 0x5A, 0x61, 0xDF, 0x68,
0x69, 0x89, 0xFE, 0xA5, 0xB6, 0xDE, 0xA9, 0x77, 0xFC, 0xC8, 0xBD, 0xBD, 0xE5, 0x6D, 0x3E, 0x5A,
0x36, 0xEF, 0x69, 0x4E, 0xBE, 0xE1, 0xE9, 0x66, 0x1C, 0xF3, 0xD9, 0x02, 0xB6, 0xF2, 0x12, 0x9B,
0x44, 0xD0, 0x6F, 0xB9, 0x35, 0x89, 0xB6, 0x46, 0x6D, 0x73, 0x82, 0x06, 0x69, 0xC1, 0xED, 0xD7,
0x85, 0xC2, 0x30, 0xDF, 0xA2, 0x62, 0xBE, 0x79, 0x2D, 0x62, 0x62, 0x3D, 0x0D, 0x7E, 0xBE, 0x48,
0x89, 0x23, 0x02, 0xA0, 0xE4, 0xD5, 0x75, 0x51, 0x32, 0x02, 0x53, 0xFD, 0x16, 0x3A, 0x21, 0x3B,
0x16, 0x0F, 0xC3, 0xB2, 0xBB, 0xB3, 0xE2, 0xBA, 0x3A, 0x3D, 0x13, 0xEC, 0xF6, 0x01, 0x45, 0x84,
0xA5, 0x70, 0x0F, 0x93, 0x49, 0x0C, 0x64, 0xCD, 0x31, 0xD5, 0xCC, 0x4C, 0x07, 0x01, 0x9E, 0x00,
0x1A, 0x23, 0x90, 0xBF, 0x88, 0x1E, 0x3B, 0xAB, 0xA6, 0x3E, 0xC4, 0x73, 0x47, 0x10, 0x7E, 0x3B,
0x5E, 0xBC, 0xE3, 0x00, 0x84, 0xFF, 0x09, 0xD4, 0xE0, 0x89, 0x0F, 0x5B, 0x58, 0x70, 0x4F, 0xFB,
0x65, 0xD8, 0x5C, 0x53, 0x1B, 0xD3, 0xC8, 0xC6, 0xBF, 0xEF, 0x98, 0xB0, 0x50, 0x4F, 0x0F, 0xEA,
0xE5, 0x83, 0x58, 0x8C, 0x28, 0x2C, 0x84, 0x67, 0xCD, 0xD0, 0x9E, 0x47, 0xDB, 0x27, 0x50, 0xCA,
0xF4, 0x63, 0x63, 0xE8, 0x97, 0x7F, 0x1B, 0x4B, 0x0C, 0xC2, 0xC1, 0x21, 0x4C, 0xCC, 0x58, 0xF5,
0x94, 0x52, 0xA3, 0xF3, 0xD3, 0xE0, 0x68, 0xF4, 0x00, 0x23, 0xF3, 0x5E, 0x0A, 0x7B, 0x93, 0xDD,
0xAB, 0x12, 0xB2, 0x13, 0xE8, 0x84, 0xD7, 0xA7, 0x9F, 0x0F, 0x32, 0x4C, 0x55, 0x1D, 0x04, 0x36,
0x52, 0xDC, 0x03, 0xF3, 0xF9, 0x4E, 0x42, 0xE9, 0x3D, 0x61, 0xEF, 0x7C, 0xB6, 0xB3, 0x93, 0x50,
]
0xb8, 0xd5, 0x3d, 0xb2, 0xe9, 0xaf, 0x78, 0x8c, 0x83, 0x33, 0x71, 0x51, 0x76, 0xa0, 0xcd, 0x37, 0x2f, 0x3e, 0x35,
0x8d, 0xa9, 0xbe, 0x98, 0xb7, 0xe7, 0x8c, 0x22, 0xce, 0x5a, 0x61, 0xdf, 0x68, 0x69, 0x89, 0xfe, 0xa5, 0xb6, 0xde,
0xa9, 0x77, 0xfc, 0xc8, 0xbd, 0xbd, 0xe5, 0x6d, 0x3e, 0x5a, 0x36, 0xef, 0x69, 0x4e, 0xbe, 0xe1, 0xe9, 0x66, 0x1c,
0xf3, 0xd9, 0x02, 0xb6, 0xf2, 0x12, 0x9b, 0x44, 0xd0, 0x6f, 0xb9, 0x35, 0x89, 0xb6, 0x46, 0x6d, 0x73, 0x82, 0x06,
0x69, 0xc1, 0xed, 0xd7, 0x85, 0xc2, 0x30, 0xdf, 0xa2, 0x62, 0xbe, 0x79, 0x2d, 0x62, 0x62, 0x3d, 0x0d, 0x7e, 0xbe,
0x48, 0x89, 0x23, 0x02, 0xa0, 0xe4, 0xd5, 0x75, 0x51, 0x32, 0x02, 0x53, 0xfd, 0x16, 0x3a, 0x21, 0x3b, 0x16, 0x0f,
0xc3, 0xb2, 0xbb, 0xb3, 0xe2, 0xba, 0x3a, 0x3d, 0x13, 0xec, 0xf6, 0x01, 0x45, 0x84, 0xa5, 0x70, 0x0f, 0x93, 0x49,
0x0c, 0x64, 0xcd, 0x31, 0xd5, 0xcc, 0x4c, 0x07, 0x01, 0x9e, 0x00, 0x1a, 0x23, 0x90, 0xbf, 0x88, 0x1e, 0x3b, 0xab,
0xa6, 0x3e, 0xc4, 0x73, 0x47, 0x10, 0x7e, 0x3b, 0x5e, 0xbc, 0xe3, 0x00, 0x84, 0xff, 0x09, 0xd4, 0xe0, 0x89, 0x0f,
0x5b, 0x58, 0x70, 0x4f, 0xfb, 0x65, 0xd8, 0x5c, 0x53, 0x1b, 0xd3, 0xc8, 0xc6, 0xbf, 0xef, 0x98, 0xb0, 0x50, 0x4f,
0x0f, 0xea, 0xe5, 0x83, 0x58, 0x8c, 0x28, 0x2c, 0x84, 0x67, 0xcd, 0xd0, 0x9e, 0x47, 0xdb, 0x27, 0x50, 0xca, 0xf4,
0x63, 0x63, 0xe8, 0x97, 0x7f, 0x1b, 0x4b, 0x0c, 0xc2, 0xc1, 0x21, 0x4c, 0xcc, 0x58, 0xf5, 0x94, 0x52, 0xa3, 0xf3,
0xd3, 0xe0, 0x68, 0xf4, 0x00, 0x23, 0xf3, 0x5e, 0x0a, 0x7b, 0x93, 0xdd, 0xab, 0x12, 0xb2, 0x13, 0xe8, 0x84, 0xd7,
0xa7, 0x9f, 0x0f, 0x32, 0x4c, 0x55, 0x1d, 0x04, 0x36, 0x52, 0xdc, 0x03, 0xf3, 0xf9, 0x4e, 0x42, 0xe9, 0x3d, 0x61,
0xef, 0x7c, 0xb6, 0xb3, 0x93, 0x50,
];

115
src/decrypt/kwm.ts
View File

@@ -1,77 +1,74 @@
import {
AudioMimeType,
BytesHasPrefix,
GetArrayBuffer,
GetCoverFromFile,
GetMetaFromFile,
SniffAudioExt
} from "@/decrypt/utils";
import {Decrypt as RawDecrypt} from "@/decrypt/raw";
AudioMimeType,
BytesHasPrefix,
GetArrayBuffer,
GetCoverFromFile,
GetMetaFromFile,
SniffAudioExt,
} from '@/decrypt/utils';
import { Decrypt as RawDecrypt } from '@/decrypt/raw';
import {parseBlob as metaParseBlob} from "music-metadata-browser";
import {DecryptResult} from "@/decrypt/entity";
import { parseBlob as metaParseBlob } from 'music-metadata-browser';
import { DecryptResult } from '@/decrypt/entity';
//prettier-ignore
const MagicHeader = [
0x79, 0x65, 0x65, 0x6C, 0x69, 0x6F, 0x6E, 0x2D,
0x6B, 0x75, 0x77, 0x6F, 0x2D, 0x74, 0x6D, 0x65,
0x79, 0x65, 0x65, 0x6C, 0x69, 0x6F, 0x6E, 0x2D,
0x6B, 0x75, 0x77, 0x6F, 0x2D, 0x74, 0x6D, 0x65,
]
const PreDefinedKey = "MoOtOiTvINGwd2E6n0E1i7L5t2IoOoNk"
const PreDefinedKey = 'MoOtOiTvINGwd2E6n0E1i7L5t2IoOoNk';
export async function Decrypt(file: File, raw_filename: string, _: string): Promise<DecryptResult> {
const oriData = new Uint8Array(await GetArrayBuffer(file));
if (!BytesHasPrefix(oriData, MagicHeader)) {
if (SniffAudioExt(oriData) === "aac") {
return await RawDecrypt(file, raw_filename, "aac", false)
}
throw Error("not a valid kwm file")
const oriData = new Uint8Array(await GetArrayBuffer(file));
if (!BytesHasPrefix(oriData, MagicHeader)) {
if (SniffAudioExt(oriData) === 'aac') {
return await RawDecrypt(file, raw_filename, 'aac', false);
}
throw Error('not a valid kwm file');
}
let fileKey = oriData.slice(0x18, 0x20)
let mask = createMaskFromKey(fileKey)
let audioData = oriData.slice(0x400);
let lenAudioData = audioData.length;
for (let cur = 0; cur < lenAudioData; ++cur)
audioData[cur] ^= mask[cur % 0x20];
let fileKey = oriData.slice(0x18, 0x20);
let mask = createMaskFromKey(fileKey);
let audioData = oriData.slice(0x400);
let lenAudioData = audioData.length;
for (let cur = 0; cur < lenAudioData; ++cur) audioData[cur] ^= mask[cur % 0x20];
const ext = SniffAudioExt(audioData);
const mime = AudioMimeType[ext];
let musicBlob = new Blob([audioData], { type: mime });
const ext = SniffAudioExt(audioData);
const mime = AudioMimeType[ext];
let musicBlob = new Blob([audioData], {type: mime});
const musicMeta = await metaParseBlob(musicBlob);
const {title, artist} = GetMetaFromFile(raw_filename, musicMeta.common.title, musicMeta.common.artist)
return {
album: musicMeta.common.album,
picture: GetCoverFromFile(musicMeta),
file: URL.createObjectURL(musicBlob),
blob: musicBlob,
mime,
title,
artist,
ext
}
const musicMeta = await metaParseBlob(musicBlob);
const { title, artist } = GetMetaFromFile(raw_filename, musicMeta.common.title, musicMeta.common.artist);
return {
album: musicMeta.common.album,
picture: GetCoverFromFile(musicMeta),
file: URL.createObjectURL(musicBlob),
blob: musicBlob,
mime,
title,
artist,
ext,
};
}
function createMaskFromKey(keyBytes: Uint8Array): Uint8Array {
let keyView = new DataView(keyBytes.buffer)
let keyStr = keyView.getBigUint64(0, true).toString()
let keyStrTrim = trimKey(keyStr)
let key = new Uint8Array(32)
for (let i = 0; i < 32; i++) {
key[i] = PreDefinedKey.charCodeAt(i) ^ keyStrTrim.charCodeAt(i)
}
return key
let keyView = new DataView(keyBytes.buffer);
let keyStr = keyView.getBigUint64(0, true).toString();
let keyStrTrim = trimKey(keyStr);
let key = new Uint8Array(32);
for (let i = 0; i < 32; i++) {
key[i] = PreDefinedKey.charCodeAt(i) ^ keyStrTrim.charCodeAt(i);
}
return key;
}
function trimKey(keyRaw: string): string {
let lenRaw = keyRaw.length;
let out = keyRaw;
if (lenRaw > 32) {
out = keyRaw.slice(0, 32)
} else if (lenRaw < 32) {
out = keyRaw.padEnd(32, keyRaw)
}
return out
let lenRaw = keyRaw.length;
let out = keyRaw;
if (lenRaw > 32) {
out = keyRaw.slice(0, 32);
} else if (lenRaw < 32) {
out = keyRaw.padEnd(32, keyRaw);
}
return out;
}

31
src/decrypt/qmc.test.ts
View File

@@ -1,10 +1,10 @@
import fs from "fs";
import {QmcDecoder} from "@/decrypt/qmc";
import {BytesEqual} from "@/decrypt/utils";
import fs from 'fs';
import { QmcDecoder } from '@/decrypt/qmc';
import { BytesEqual } from '@/decrypt/utils';
function loadTestDataDecoder(name: string): {
cipherText: Uint8Array,
clearText: Uint8Array
cipherText: Uint8Array;
clearText: Uint8Array;
} {
const cipherBody = fs.readFileSync(`./testdata/${name}_raw.bin`);
const cipherSuffix = fs.readFileSync(`./testdata/${name}_suffix.bin`);
@@ -13,20 +13,17 @@ function loadTestDataDecoder(name: string): {
cipherText.set(cipherSuffix, cipherBody.length);
return {
cipherText,
clearText: fs.readFileSync(`testdata/${name}_target.bin`)
}
clearText: fs.readFileSync(`testdata/${name}_target.bin`),
};
}
test("qmc: real file", async () => {
const cases = ["mflac0_rc4", "mflac_map", "mgg_map", "qmc0_static"]
test('qmc: real file', async () => {
const cases = ['mflac0_rc4', 'mflac_map', 'mgg_map', 'qmc0_static'];
for (const name of cases) {
const {clearText, cipherText} = loadTestDataDecoder(name)
const c = new QmcDecoder(cipherText)
const buf = c.decrypt()
const { clearText, cipherText } = loadTestDataDecoder(name);
const c = new QmcDecoder(cipherText);
const buf = c.decrypt();
expect(BytesEqual(buf, clearText)).toBeTruthy()
expect(BytesEqual(buf, clearText)).toBeTruthy();
}
})
});

178
src/decrypt/qmc.ts
View File

@@ -1,4 +1,4 @@
import {QmcMapCipher, QmcRC4Cipher, QmcStaticCipher, QmcStreamCipher} from "./qmc_cipher";
import { QmcMapCipher, QmcRC4Cipher, QmcStaticCipher, QmcStreamCipher } from './qmc_cipher';
import {
AudioMimeType,
GetArrayBuffer,
@@ -7,44 +7,43 @@ import {
GetMetaFromFile,
SniffAudioExt,
WriteMetaToFlac,
WriteMetaToMp3
} from "@/decrypt/utils";
import {parseBlob as metaParseBlob} from "music-metadata-browser";
import {DecryptQMCWasm} from "./qmc_wasm";
WriteMetaToMp3,
} from '@/decrypt/utils';
import { parseBlob as metaParseBlob } from 'music-metadata-browser';
import { DecryptQMCWasm } from './qmc_wasm';
import iconv from "iconv-lite";
import {DecryptResult} from "@/decrypt/entity";
import {queryAlbumCover} from "@/utils/api";
import {QmcDeriveKey} from "@/decrypt/qmc_key";
import iconv from 'iconv-lite';
import { DecryptResult } from '@/decrypt/entity';
import { queryAlbumCover } from '@/utils/api';
import { QmcDeriveKey } from '@/decrypt/qmc_key';
interface Handler {
ext: string
version: number
ext: string;
version: number;
}
export const HandlerMap: { [key: string]: Handler } = {
"mgg": {ext: "ogg", version: 2},
"mgg1": {ext: "ogg", version: 2},
"mflac": {ext: "flac", version: 2},
"mflac0": {ext: "flac", version: 2},
mgg: { ext: 'ogg', version: 2 },
mgg1: { ext: 'ogg', version: 2 },
mflac: { ext: 'flac', version: 2 },
mflac0: { ext: 'flac', version: 2 },
// qmcflac / qmcogg:
// 有可能是 v2 加密但混用同一个后缀名。
"qmcflac": {ext: "flac", version: 2},
"qmcogg": {ext: "ogg", version: 2},
qmcflac: { ext: 'flac', version: 2 },
qmcogg: { ext: 'ogg', version: 2 },
"qmc0": {ext: "mp3", version: 1},
"qmc2": {ext: "ogg", version: 1},
"qmc3": {ext: "mp3", version: 1},
"bkcmp3": {ext: "mp3", version: 1},
"bkcflac": {ext: "flac", version: 1},
"tkm": {ext: "m4a", version: 1},
"666c6163": {ext: "flac", version: 1},
"6d7033": {ext: "mp3", version: 1},
"6f6767": {ext: "ogg", version: 1},
"6d3461": {ext: "m4a", version: 1},
"776176": {ext: "wav", version: 1}
qmc0: { ext: 'mp3', version: 1 },
qmc2: { ext: 'ogg', version: 1 },
qmc3: { ext: 'mp3', version: 1 },
bkcmp3: { ext: 'mp3', version: 1 },
bkcflac: { ext: 'flac', version: 1 },
tkm: { ext: 'm4a', version: 1 },
'666c6163': { ext: 'flac', version: 1 },
'6d7033': { ext: 'mp3', version: 1 },
'6f6767': { ext: 'ogg', version: 1 },
'6d3461': { ext: 'm4a', version: 1 },
'776176': { ext: 'wav', version: 1 },
};
export async function Decrypt(file: Blob, raw_filename: string, raw_ext: string): Promise<DecryptResult> {
@@ -56,7 +55,7 @@ export async function Decrypt(file: Blob, raw_filename: string, raw_ext: string)
let musicDecoded: Uint8Array | undefined;
if (version === 2 && globalThis.WebAssembly) {
console.log("qmc: using wasm decoder")
console.log('qmc: using wasm decoder');
const v2Decrypted = await DecryptQMCWasm(fileBuffer);
// 如果 v2 检测失败，降级到 v1 再尝试一次
if (v2Decrypted) {
@@ -65,28 +64,28 @@ export async function Decrypt(file: Blob, raw_filename: string, raw_ext: string)
}
if (!musicDecoded) {
// may throw error
console.log("qmc: using js decoder")
const d = new QmcDecoder(new Uint8Array(fileBuffer))
musicDecoded = d.decrypt()
console.log('qmc: using js decoder');
const d = new QmcDecoder(new Uint8Array(fileBuffer));
musicDecoded = d.decrypt();
}
const ext = SniffAudioExt(musicDecoded, handler.ext);
const mime = AudioMimeType[ext];
let musicBlob = new Blob([musicDecoded], {type: mime});
let musicBlob = new Blob([musicDecoded], { type: mime });
const musicMeta = await metaParseBlob(musicBlob);
for (let metaIdx in musicMeta.native) {
if (!musicMeta.native.hasOwnProperty(metaIdx)) continue
if (musicMeta.native[metaIdx].some(item => item.id === "TCON" && item.value === "(12)")) {
console.warn("try using gbk encoding to decode meta")
musicMeta.common.artist = iconv.decode(new Buffer(musicMeta.common.artist ?? ""), "gbk");
musicMeta.common.title = iconv.decode(new Buffer(musicMeta.common.title ?? ""), "gbk");
musicMeta.common.album = iconv.decode(new Buffer(musicMeta.common.album ?? ""), "gbk");
if (!musicMeta.native.hasOwnProperty(metaIdx)) continue;
if (musicMeta.native[metaIdx].some((item) => item.id === 'TCON' && item.value === '(12)')) {
console.warn('try using gbk encoding to decode meta');
musicMeta.common.artist = iconv.decode(new Buffer(musicMeta.common.artist ?? ''), 'gbk');
musicMeta.common.title = iconv.decode(new Buffer(musicMeta.common.title ?? ''), 'gbk');
musicMeta.common.album = iconv.decode(new Buffer(musicMeta.common.album ?? ''), 'gbk');
}
}
const info = GetMetaFromFile(raw_filename, musicMeta.common.title, musicMeta.common.artist)
const info = GetMetaFromFile(raw_filename, musicMeta.common.title, musicMeta.common.artist);
let imgUrl = GetCoverFromFile(musicMeta);
if (!imgUrl) {
@@ -94,20 +93,20 @@ export async function Decrypt(file: Blob, raw_filename: string, raw_ext: string)
if (imgUrl) {
const imageInfo = await GetImageFromURL(imgUrl);
if (imageInfo) {
imgUrl = imageInfo.url
imgUrl = imageInfo.url;
try {
const newMeta = {picture: imageInfo.buffer, title: info.title, artists: info.artist?.split(" _ ")}
if (ext === "mp3") {
musicDecoded = WriteMetaToMp3(Buffer.from(musicDecoded), newMeta, musicMeta)
musicBlob = new Blob([musicDecoded], {type: mime});
const newMeta = { picture: imageInfo.buffer, title: info.title, artists: info.artist?.split(' _ ') };
if (ext === 'mp3') {
musicDecoded = WriteMetaToMp3(Buffer.from(musicDecoded), newMeta, musicMeta);
musicBlob = new Blob([musicDecoded], { type: mime });
} else if (ext === 'flac') {
musicDecoded = WriteMetaToFlac(Buffer.from(musicDecoded), newMeta, musicMeta)
musicBlob = new Blob([musicDecoded], {type: mime});
musicDecoded = WriteMetaToFlac(Buffer.from(musicDecoded), newMeta, musicMeta);
musicBlob = new Blob([musicDecoded], { type: mime });
} else {
console.info("writing metadata for " + ext + " is not being supported for now")
console.info('writing metadata for ' + ext + ' is not being supported for now');
}
} catch (e) {
console.warn("Error while appending cover image to file " + e)
console.warn('Error while appending cover image to file ' + e);
}
}
}
@@ -120,86 +119,83 @@ export async function Decrypt(file: Blob, raw_filename: string, raw_ext: string)
picture: imgUrl,
file: URL.createObjectURL(musicBlob),
blob: musicBlob,
mime: mime
}
mime: mime,
};
}
async function getCoverImage(title: string, artist?: string, album?: string): Promise<string> {
const song_query_url = "https://stats.ixarea.com/apis" + "/music/qq-cover"
const song_query_url = 'https://stats.ixarea.com/apis' + '/music/qq-cover';
try {
const data = await queryAlbumCover(title, artist, album)
return `${song_query_url}/${data.Type}/${data.Id}`
const data = await queryAlbumCover(title, artist, album);
return `${song_query_url}/${data.Type}/${data.Id}`;
} catch (e) {
console.warn(e);
}
return ""
return '';
}
export class QmcDecoder {
file: Uint8Array
size: number
decoded: boolean = false
audioSize?: number
private static readonly BYTE_COMMA = ','.charCodeAt(0)
cipher?: QmcStreamCipher
private static readonly BYTE_COMMA = ','.charCodeAt(0);
file: Uint8Array;
size: number;
decoded: boolean = false;
audioSize?: number;
cipher?: QmcStreamCipher;
constructor(file: Uint8Array) {
this.file = file
this.size = file.length
this.searchKey()
this.file = file;
this.size = file.length;
this.searchKey();
}
decrypt(): Uint8Array {
if (!this.cipher) {
throw new Error("no cipher found")
throw new Error('no cipher found');
}
if (!this.audioSize || this.audioSize <= 0) {
throw new Error("invalid audio size")
throw new Error('invalid audio size');
}
const audioBuf = this.file.subarray(0, this.audioSize)
const audioBuf = this.file.subarray(0, this.audioSize);
if (!this.decoded) {
this.cipher.decrypt(audioBuf, 0)
this.decoded = true
this.cipher.decrypt(audioBuf, 0);
this.decoded = true;
}
return audioBuf
return audioBuf;
}
private searchKey() {
const last4Byte = this.file.slice(-4);
const textEnc = new TextDecoder()
const textEnc = new TextDecoder();
if (textEnc.decode(last4Byte) === 'QTag') {
const sizeBuf = this.file.slice(-8, -4)
const sizeView = new DataView(sizeBuf.buffer, sizeBuf.byteOffset)
const keySize = sizeView.getUint32(0, false)
this.audioSize = this.size - keySize - 8
const rawKey = this.file.subarray(this.audioSize, this.size - 8)
const keyEnd = rawKey.findIndex(v => v == QmcDecoder.BYTE_COMMA)
this.setCipher(rawKey.subarray(0, keyEnd))
const sizeBuf = this.file.slice(-8, -4);
const sizeView = new DataView(sizeBuf.buffer, sizeBuf.byteOffset);
const keySize = sizeView.getUint32(0, false);
this.audioSize = this.size - keySize - 8;
const rawKey = this.file.subarray(this.audioSize, this.size - 8);
const keyEnd = rawKey.findIndex((v) => v == QmcDecoder.BYTE_COMMA);
this.setCipher(rawKey.subarray(0, keyEnd));
} else {
const sizeView = new DataView(last4Byte.buffer, last4Byte.byteOffset);
const keySize = sizeView.getUint32(0, true)
const keySize = sizeView.getUint32(0, true);
if (keySize < 0x300) {
this.audioSize = this.size - keySize - 4
const rawKey = this.file.subarray(this.audioSize, this.size - 4)
this.setCipher(rawKey)
this.audioSize = this.size - keySize - 4;
const rawKey = this.file.subarray(this.audioSize, this.size - 4);
this.setCipher(rawKey);
} else {
this.audioSize = this.size
this.cipher = new QmcStaticCipher()
this.audioSize = this.size;
this.cipher = new QmcStaticCipher();
}
}
}
private setCipher(keyRaw: Uint8Array) {
const keyDec = QmcDeriveKey(keyRaw)
const keyDec = QmcDeriveKey(keyRaw);
if (keyDec.length > 300) {
this.cipher = new QmcRC4Cipher(keyDec)
this.cipher = new QmcRC4Cipher(keyDec);
} else {
this.cipher = new QmcMapCipher(keyDec)
this.cipher = new QmcMapCipher(keyDec);
}
}
}

134
src/decrypt/qmc_cipher.test.ts
View File

@@ -1,115 +1,117 @@
import {QmcMapCipher, QmcRC4Cipher, QmcStaticCipher} from "@/decrypt/qmc_cipher";
import fs from 'fs'
import { QmcMapCipher, QmcRC4Cipher, QmcStaticCipher } from '@/decrypt/qmc_cipher';
import fs from 'fs';
test("static cipher [0x7ff8,0x8000) ", () => {
test('static cipher [0x7ff8,0x8000) ', () => {
//prettier-ignore
const expected = new Uint8Array([
0xD8, 0x52, 0xF7, 0x67, 0x90, 0xCA, 0xD6, 0x4A,
0x4A, 0xD6, 0xCA, 0x90, 0x67, 0xF7, 0x52, 0xD8,
])
const c = new QmcStaticCipher()
const buf = new Uint8Array(16)
c.decrypt(buf, 0x7ff8)
const c = new QmcStaticCipher();
const buf = new Uint8Array(16);
c.decrypt(buf, 0x7ff8);
expect(buf).toStrictEqual(expected)
})
expect(buf).toStrictEqual(expected);
});
test("static cipher [0,0x10) ", () => {
test('static cipher [0,0x10) ', () => {
//prettier-ignore
const expected = new Uint8Array([
0xC3, 0x4A, 0xD6, 0xCA, 0x90, 0x67, 0xF7, 0x52,
0xD8, 0xA1, 0x66, 0x62, 0x9F, 0x5B, 0x09, 0x00,
])
const c = new QmcStaticCipher()
const buf = new Uint8Array(16)
c.decrypt(buf, 0)
const c = new QmcStaticCipher();
const buf = new Uint8Array(16);
c.decrypt(buf, 0);
expect(buf).toStrictEqual(expected)
})
expect(buf).toStrictEqual(expected);
});
test("map cipher: get mask", () => {
test('map cipher: get mask', () => {
//prettier-ignore
const expected = new Uint8Array([
0xBB, 0x7D, 0x80, 0xBE, 0xFF, 0x38, 0x81, 0xFB,
0xBB, 0xFF, 0x82, 0x3C, 0xFF, 0xBA, 0x83, 0x79,
])
const key = new Uint8Array(256)
for (let i = 0; i < 256; i++) key[i] = i
const buf = new Uint8Array(16)
const key = new Uint8Array(256);
for (let i = 0; i < 256; i++) key[i] = i;
const buf = new Uint8Array(16);
const c = new QmcMapCipher(key)
c.decrypt(buf, 0)
expect(buf).toStrictEqual(expected)
})
const c = new QmcMapCipher(key);
c.decrypt(buf, 0);
expect(buf).toStrictEqual(expected);
});
function loadTestDataCipher(name: string): {
key: Uint8Array,
cipherText: Uint8Array,
clearText: Uint8Array
key: Uint8Array;
cipherText: Uint8Array;
clearText: Uint8Array;
} {
return {
key: fs.readFileSync(`testdata/${name}_key.bin`),
cipherText: fs.readFileSync(`testdata/${name}_raw.bin`),
clearText: fs.readFileSync(`testdata/${name}_target.bin`)
}
clearText: fs.readFileSync(`testdata/${name}_target.bin`),
};
}
test("map cipher: real file", async () => {
const cases = ["mflac_map", "mgg_map"]
test('map cipher: real file', async () => {
const cases = ['mflac_map', 'mgg_map'];
for (const name of cases) {
const {key, clearText, cipherText} = loadTestDataCipher(name)
const c = new QmcMapCipher(key)
const { key, clearText, cipherText } = loadTestDataCipher(name);
const c = new QmcMapCipher(key);
c.decrypt(cipherText, 0)
c.decrypt(cipherText, 0);
expect(cipherText).toStrictEqual(clearText)
expect(cipherText).toStrictEqual(clearText);
}
})
});
test("rc4 cipher: real file", async () => {
const cases = ["mflac0_rc4"]
test('rc4 cipher: real file', async () => {
const cases = ['mflac0_rc4'];
for (const name of cases) {
const {key, clearText, cipherText} = loadTestDataCipher(name)
const c = new QmcRC4Cipher(key)
const { key, clearText, cipherText } = loadTestDataCipher(name);
const c = new QmcRC4Cipher(key);
c.decrypt(cipherText, 0)
c.decrypt(cipherText, 0);
expect(cipherText).toStrictEqual(clearText)
expect(cipherText).toStrictEqual(clearText);
}
})
});
test("rc4 cipher: first segment", async () => {
const cases = ["mflac0_rc4"]
test('rc4 cipher: first segment', async () => {
const cases = ['mflac0_rc4'];
for (const name of cases) {
const {key, clearText, cipherText} = loadTestDataCipher(name)
const c = new QmcRC4Cipher(key)
const { key, clearText, cipherText } = loadTestDataCipher(name);
const c = new QmcRC4Cipher(key);
const buf = cipherText.slice(0, 128)
c.decrypt(buf, 0)
expect(buf).toStrictEqual(clearText.slice(0, 128))
const buf = cipherText.slice(0, 128);
c.decrypt(buf, 0);
expect(buf).toStrictEqual(clearText.slice(0, 128));
}
})
});
test("rc4 cipher: align block (128~5120)", async () => {
const cases = ["mflac0_rc4"]
test('rc4 cipher: align block (128~5120)', async () => {
const cases = ['mflac0_rc4'];
for (const name of cases) {
const {key, clearText, cipherText} = loadTestDataCipher(name)
const c = new QmcRC4Cipher(key)
const { key, clearText, cipherText } = loadTestDataCipher(name);
const c = new QmcRC4Cipher(key);
const buf = cipherText.slice(128, 5120)
c.decrypt(buf, 128)
expect(buf).toStrictEqual(clearText.slice(128, 5120))
const buf = cipherText.slice(128, 5120);
c.decrypt(buf, 128);
expect(buf).toStrictEqual(clearText.slice(128, 5120));
}
})
});
test("rc4 cipher: simple block (5120~10240)", async () => {
const cases = ["mflac0_rc4"]
test('rc4 cipher: simple block (5120~10240)', async () => {
const cases = ['mflac0_rc4'];
for (const name of cases) {
const {key, clearText, cipherText} = loadTestDataCipher(name)
const c = new QmcRC4Cipher(key)
const { key, clearText, cipherText } = loadTestDataCipher(name);
const c = new QmcRC4Cipher(key);
const buf = cipherText.slice(5120, 10240)
c.decrypt(buf, 5120)
expect(buf).toStrictEqual(clearText.slice(5120, 10240))
const buf = cipherText.slice(5120, 10240);
c.decrypt(buf, 5120);
expect(buf).toStrictEqual(clearText.slice(5120, 10240));
}
})
});

72
src/decrypt/qmc_cipher.ts
View File

@@ -1,9 +1,9 @@
export interface QmcStreamCipher {
decrypt(buf: Uint8Array, offset: number): void
decrypt(buf: Uint8Array, offset: number): void;
}
export class QmcStaticCipher implements QmcStreamCipher {
//prettier-ignore
private static readonly staticCipherBox: Uint8Array = new Uint8Array([
0x77, 0x48, 0x32, 0x73, 0xDE, 0xF2, 0xC0, 0xC8, //0x00
0x95, 0xEC, 0x30, 0xB2, 0x51, 0xC3, 0xE1, 0xA0, //0x08
@@ -40,26 +40,26 @@ export class QmcStaticCipher implements QmcStreamCipher {
])
public getMask(offset: number) {
if (offset > 0x7FFF) offset %= 0x7FFF
return QmcStaticCipher.staticCipherBox[(offset * offset + 27) & 0xff]
if (offset > 0x7fff) offset %= 0x7fff;
return QmcStaticCipher.staticCipherBox[(offset * offset + 27) & 0xff];
}
public decrypt(buf: Uint8Array, offset: number) {
for (let i = 0; i < buf.length; i++) {
buf[i] ^= this.getMask(offset + i)
buf[i] ^= this.getMask(offset + i);
}
}
}
export class QmcMapCipher implements QmcStreamCipher {
key: Uint8Array
n: number
key: Uint8Array;
n: number;
constructor(key: Uint8Array) {
if (key.length == 0) throw Error("qmc/cipher_map: invalid key size")
if (key.length == 0) throw Error('qmc/cipher_map: invalid key size');
this.key = key
this.n = key.length
this.key = key;
this.n = key.length;
}
private static rotate(value: number, bits: number) {
@@ -71,7 +71,7 @@ export class QmcMapCipher implements QmcStreamCipher {
decrypt(buf: Uint8Array, offset: number): void {
for (let i = 0; i < buf.length; i++) {
buf[i] ^= this.getMask(offset + i)
buf[i] ^= this.getMask(offset + i);
}
}
@@ -79,27 +79,26 @@ export class QmcMapCipher implements QmcStreamCipher {
if (offset > 0x7fff) offset %= 0x7fff;
const idx = (offset * offset + 71214) % this.n;
return QmcMapCipher.rotate(this.key[idx], idx & 0x7)
return QmcMapCipher.rotate(this.key[idx], idx & 0x7);
}
}
export class QmcRC4Cipher implements QmcStreamCipher {
private static readonly FIRST_SEGMENT_SIZE = 0x80;
private static readonly SEGMENT_SIZE = 5120
private static readonly SEGMENT_SIZE = 5120;
S: Uint8Array
N: number
key: Uint8Array
hash: number
S: Uint8Array;
N: number;
key: Uint8Array;
hash: number;
constructor(key: Uint8Array) {
if (key.length == 0) {
throw Error("invalid key size")
throw Error('invalid key size');
}
this.key = key
this.N = key.length
this.key = key;
this.N = key.length;
// init seed box
this.S = new Uint8Array(this.N);
@@ -109,7 +108,7 @@ export class QmcRC4Cipher implements QmcStreamCipher {
let j = 0;
for (let i = 0; i < this.N; ++i) {
j = (this.S[i] + j + this.key[i % this.N]) % this.N;
[this.S[i], this.S[j]] = [this.S[j], this.S[i]]
[this.S[i], this.S[j]] = [this.S[j], this.S[i]];
}
// init hash base
@@ -125,7 +124,6 @@ export class QmcRC4Cipher implements QmcStreamCipher {
this.hash = next_hash;
}
}
decrypt(buf: Uint8Array, offset: number): void {
@@ -133,52 +131,50 @@ export class QmcRC4Cipher implements QmcStreamCipher {
let processed = 0;
const postProcess = (len: number): boolean => {
toProcess -= len;
processed += len
offset += len
return toProcess == 0
}
processed += len;
offset += len;
return toProcess == 0;
};
// Initial segment
if (offset < QmcRC4Cipher.FIRST_SEGMENT_SIZE) {
const len_segment = Math.min(buf.length, QmcRC4Cipher.FIRST_SEGMENT_SIZE - offset);
this.encFirstSegment(buf.subarray(0, len_segment), offset);
if (postProcess(len_segment)) return
if (postProcess(len_segment)) return;
}
// align segment
if (offset % QmcRC4Cipher.SEGMENT_SIZE != 0) {
const len_segment = Math.min(QmcRC4Cipher.SEGMENT_SIZE - (offset % QmcRC4Cipher.SEGMENT_SIZE), toProcess);
this.encASegment(buf.subarray(processed, processed + len_segment), offset);
if (postProcess(len_segment)) return
if (postProcess(len_segment)) return;
}
// Batch process segments
while (toProcess > QmcRC4Cipher.SEGMENT_SIZE) {
this.encASegment(buf.subarray(processed, processed + QmcRC4Cipher.SEGMENT_SIZE), offset);
postProcess(QmcRC4Cipher.SEGMENT_SIZE)
postProcess(QmcRC4Cipher.SEGMENT_SIZE);
}
// Last segment (incomplete segment)
if (toProcess > 0) {
this.encASegment(buf.subarray(processed), offset);
}
}
private encFirstSegment(buf: Uint8Array, offset: number) {
for (let i = 0; i < buf.length; i++) {
buf[i] ^= this.key[this.getSegmentKey(offset + i)];
}
}
private encASegment(buf: Uint8Array, offset: number) {
// Initialise a new seed box
const S = this.S.slice(0)
const S = this.S.slice(0);
// Calculate the number of bytes to skip.
// The initial "key" derived from segment id, plus the current offset.
const skipLen = (offset % QmcRC4Cipher.SEGMENT_SIZE) + this.getSegmentKey(offset / QmcRC4Cipher.SEGMENT_SIZE)
const skipLen = (offset % QmcRC4Cipher.SEGMENT_SIZE) + this.getSegmentKey(offset / QmcRC4Cipher.SEGMENT_SIZE);
// decrypt the block
let j = 0;
@@ -186,7 +182,7 @@ export class QmcRC4Cipher implements QmcStreamCipher {
for (let i = -skipLen; i < buf.length; i++) {
j = (j + 1) % this.N;
k = (S[j] + k) % this.N;
[S[k], S[j]] = [S[j], S[k]]
[S[k], S[j]] = [S[j], S[k]];
if (i >= 0) {
buf[i] ^= S[(S[j] + S[k]) % this.N];
@@ -195,8 +191,8 @@ export class QmcRC4Cipher implements QmcStreamCipher {
}
private getSegmentKey(id: number): number {
const seed = this.key[id % this.N]
const idx = (this.hash / ((id + 1) * seed) * 100.0) | 0;
return idx % this.N
const seed = this.key[id % this.N];
const idx = ((this.hash / ((id + 1) * seed)) * 100.0) | 0;
return idx % this.N;
}
}

34
src/decrypt/qmc_key.test.ts
View File

@@ -1,30 +1,26 @@
import {QmcDeriveKey, simpleMakeKey} from "@/decrypt/qmc_key";
import fs from "fs";
import { QmcDeriveKey, simpleMakeKey } from '@/decrypt/qmc_key';
import fs from 'fs';
test("key dec: make simple key", () => {
expect(
simpleMakeKey(106, 8)
).toStrictEqual(
[0x69, 0x56, 0x46, 0x38, 0x2b, 0x20, 0x15, 0x0b]
)
})
test('key dec: make simple key', () => {
expect(simpleMakeKey(106, 8)).toStrictEqual([0x69, 0x56, 0x46, 0x38, 0x2b, 0x20, 0x15, 0x0b]);
});
function loadTestDataKeyDecrypt(name: string): {
cipherText: Uint8Array,
clearText: Uint8Array
cipherText: Uint8Array;
clearText: Uint8Array;
} {
return {
cipherText: fs.readFileSync(`testdata/${name}_key_raw.bin`),
clearText: fs.readFileSync(`testdata/${name}_key.bin`)
}
clearText: fs.readFileSync(`testdata/${name}_key.bin`),
};
}
test("key dec: real file", async () => {
const cases = ["mflac_map", "mgg_map", "mflac0_rc4"]
test('key dec: real file', async () => {
const cases = ['mflac_map', 'mgg_map', 'mflac0_rc4'];
for (const name of cases) {
const {clearText, cipherText} = loadTestDataKeyDecrypt(name)
const buf = QmcDeriveKey(cipherText)
const { clearText, cipherText } = loadTestDataKeyDecrypt(name);
const buf = QmcDeriveKey(cipherText);
expect(buf).toStrictEqual(clearText)
expect(buf).toStrictEqual(clearText);
}
})
});

64
src/decrypt/qmc_key.ts
View File

@@ -1,86 +1,83 @@
import {TeaCipher} from "@/utils/tea";
import { TeaCipher } from '@/utils/tea';
const SALT_LEN = 2
const ZERO_LEN = 7
const SALT_LEN = 2;
const ZERO_LEN = 7;
export function QmcDeriveKey(raw: Uint8Array): Uint8Array {
const textDec = new TextDecoder()
const rawDec = Buffer.from(textDec.decode(raw), 'base64')
const textDec = new TextDecoder();
const rawDec = Buffer.from(textDec.decode(raw), 'base64');
let n = rawDec.length;
if (n < 16) {
throw Error("key length is too short")
throw Error('key length is too short');
}
const simpleKey = simpleMakeKey(106, 8)
const simpleKey = simpleMakeKey(106, 8);
let teaKey = new Uint8Array(16);
for (let i = 0; i < 8; i++) {
teaKey[i << 1] = simpleKey[i];
teaKey[(i << 1) + 1] = rawDec[i];
}
const sub = decryptTencentTea(rawDec.subarray(8), teaKey)
rawDec.set(sub, 8)
return rawDec.subarray(0, 8 + sub.length)
const sub = decryptTencentTea(rawDec.subarray(8), teaKey);
rawDec.set(sub, 8);
return rawDec.subarray(0, 8 + sub.length);
}
// simpleMakeKey exported only for unit test
export function simpleMakeKey(salt: number, length: number): number[] {
const keyBuf: number[] = []
const keyBuf: number[] = [];
for (let i = 0; i < length; i++) {
const tmp = Math.tan(salt + i * 0.1)
keyBuf[i] = 0xff & (Math.abs(tmp) * 100.0)
const tmp = Math.tan(salt + i * 0.1);
keyBuf[i] = 0xff & (Math.abs(tmp) * 100.0);
}
return keyBuf
return keyBuf;
}
function decryptTencentTea(inBuf: Uint8Array, key: Uint8Array): Uint8Array {
if (inBuf.length % 8 != 0) {
throw Error("inBuf size not a multiple of the block size")
throw Error('inBuf size not a multiple of the block size');
}
if (inBuf.length < 16) {
throw Error("inBuf size too small")
throw Error('inBuf size too small');
}
const blk = new TeaCipher(key, 32)
const blk = new TeaCipher(key, 32);
const tmpBuf = new Uint8Array(8);
const tmpView = new DataView(tmpBuf.buffer);
blk.decrypt(tmpView, new DataView(inBuf.buffer, inBuf.byteOffset, 8))
blk.decrypt(tmpView, new DataView(inBuf.buffer, inBuf.byteOffset, 8));
const nPadLen = tmpBuf[0] & 0x7;//只要最低三位
const nPadLen = tmpBuf[0] & 0x7; //只要最低三位
/*密文格式:PadLen(1byte)+Padding(var,0-7byte)+Salt(2byte)+Body(var byte)+Zero(7byte)*/
const outLen = inBuf.length - 1 /*PadLen*/ - nPadLen - SALT_LEN - ZERO_LEN;
const outBuf = new Uint8Array(outLen)
const outBuf = new Uint8Array(outLen);
let ivPrev = new Uint8Array(8);
let ivCur = inBuf.slice(0, 8); // init iv
let inBufPos = 8;
// 跳过 Padding Len 和 Padding
let tmpIdx = 1 + nPadLen;
// CBC IV 处理
const cryptBlock = () => {
ivPrev = ivCur;
ivCur = inBuf.slice(inBufPos, inBufPos + 8)
ivCur = inBuf.slice(inBufPos, inBufPos + 8);
for (let j = 0; j < 8; j++) {
tmpBuf[j] ^= ivCur[j]
tmpBuf[j] ^= ivCur[j];
}
blk.decrypt(tmpView, tmpView)
blk.decrypt(tmpView, tmpView);
inBufPos += 8;
tmpIdx = 0;
}
};
// 跳过 Salt
for (let i = 1; i <= SALT_LEN;) {
for (let i = 1; i <= SALT_LEN; ) {
if (tmpIdx < 8) {
tmpIdx++;
i++;
} else {
cryptBlock()
cryptBlock();
}
}
@@ -89,19 +86,18 @@ function decryptTencentTea(inBuf: Uint8Array, key: Uint8Array): Uint8Array {
while (outBufPos < outLen) {
if (tmpIdx < 8) {
outBuf[outBufPos] = tmpBuf[tmpIdx] ^ ivPrev[tmpIdx];
outBufPos++
outBufPos++;
tmpIdx++;
} else {
cryptBlock()
cryptBlock();
}
}
// 校验Zero
for (let i = 1; i <= ZERO_LEN; i++) {
if (tmpBuf[tmpIdx] != ivPrev[tmpIdx]) {
throw Error("zero check failed")
throw Error('zero check failed');
}
}
return outBuf
return outBuf;
}

22
src/decrypt/qmc_wasm.ts
View File

@@ -8,13 +8,13 @@ const DECRYPTION_BUF_SIZE = 2 * 1024 * 1024;
function MergeUint8Array(array: Uint8Array[]): Uint8Array {
let length = 0;
array.forEach(item => {
array.forEach((item) => {
length += item.length;
});
let mergedArray = new Uint8Array(length);
let offset = 0;
array.forEach(item => {
array.forEach((item) => {
mergedArray.set(item, offset);
offset += item.length;
});
@@ -42,16 +42,12 @@ export async function DecryptQMCWasm(mggBlob: ArrayBuffer) {
const pDetectionResult = QMCCrypto._malloc(QMCCrypto.sizeof_qmc_detection());
// 进行检测
const detectOK = QMCCrypto.detectKeyEndPosition(
pDetectionResult,
pDetectionBuf,
detectionBuf.length
);
const detectOK = QMCCrypto.detectKeyEndPosition(pDetectionResult, pDetectionBuf, detectionBuf.length);
// 提取结构体内容：
// (pos: i32; len: i32; error: char[??])
const position = QMCCrypto.getValue(pDetectionResult, "i32");
const len = QMCCrypto.getValue(pDetectionResult + 4, "i32");
const position = QMCCrypto.getValue(pDetectionResult, 'i32');
const len = QMCCrypto.getValue(pDetectionResult + 4, 'i32');
// 释放内存
QMCCrypto._free(pDetectionBuf);
@@ -66,9 +62,7 @@ export async function DecryptQMCWasm(mggBlob: ArrayBuffer) {
const decryptedSize = mggBlob.byteLength - DETECTION_SIZE + position;
// 提取嵌入到文件的 EKey
const ekey = new Uint8Array(
mggBlob.slice(decryptedSize, decryptedSize + len)
);
const ekey = new Uint8Array(mggBlob.slice(decryptedSize, decryptedSize + len));
// 解码 UTF-8 数据到 string
const decoder = new TextDecoder();
@@ -85,9 +79,7 @@ export async function DecryptQMCWasm(mggBlob: ArrayBuffer) {
const blockSize = Math.min(bytesToDecrypt, DECRYPTION_BUF_SIZE);
// 解密一些片段
const blockData = new Uint8Array(
mggBlob.slice(offset, offset + blockSize)
);
const blockData = new Uint8Array(mggBlob.slice(offset, offset + blockSize));
QMCCrypto.writeArrayToMemory(blockData, buf);
QMCCrypto.decryptStream(hCrypto, buf, offset, blockSize);
decryptedParts.push(QMCCrypto.HEAPU8.slice(buf, buf + blockSize));

87
src/decrypt/qmccache.ts
View File

@@ -1,51 +1,50 @@
import {
AudioMimeType,
GetArrayBuffer,
GetCoverFromFile,
GetMetaFromFile,
SniffAudioExt,
SplitFilename
} from "@/decrypt/utils";
AudioMimeType,
GetArrayBuffer,
GetCoverFromFile,
GetMetaFromFile,
SniffAudioExt,
SplitFilename,
} from '@/decrypt/utils';
import {Decrypt as QmcDecrypt, HandlerMap} from "@/decrypt/qmc";
import { Decrypt as QmcDecrypt, HandlerMap } from '@/decrypt/qmc';
import {DecryptResult} from "@/decrypt/entity";
import { DecryptResult } from '@/decrypt/entity';
import {parseBlob as metaParseBlob} from "music-metadata-browser";
import { parseBlob as metaParseBlob } from 'music-metadata-browser';
export async function Decrypt(file: Blob, raw_filename: string, _: string)
: Promise<DecryptResult> {
const buffer = new Uint8Array(await GetArrayBuffer(file));
let length = buffer.length
for (let i = 0; i < length; i++) {
buffer[i] ^= 0xf4
if (buffer[i] <= 0x3f) buffer[i] = buffer[i] * 4;
else if (buffer[i] <= 0x7f) buffer[i] = (buffer[i] - 0x40) * 4 + 1;
else if (buffer[i] <= 0xbf) buffer[i] = (buffer[i] - 0x80) * 4 + 2;
else buffer[i] = (buffer[i] - 0xc0) * 4 + 3;
}
let ext = SniffAudioExt(buffer, "");
const newName = SplitFilename(raw_filename)
let audioBlob: Blob
if (ext !== "" || newName.ext === "mp3") {
audioBlob = new Blob([buffer], {type: AudioMimeType[ext]})
} else if (newName.ext in HandlerMap) {
audioBlob = new Blob([buffer], {type: "application/octet-stream"})
return QmcDecrypt(audioBlob, newName.name, newName.ext);
} else {
throw "不支持的QQ音乐缓存格式"
}
const tag = await metaParseBlob(audioBlob);
const {title, artist} = GetMetaFromFile(raw_filename, tag.common.title, tag.common.artist)
export async function Decrypt(file: Blob, raw_filename: string, _: string): Promise<DecryptResult> {
const buffer = new Uint8Array(await GetArrayBuffer(file));
let length = buffer.length;
for (let i = 0; i < length; i++) {
buffer[i] ^= 0xf4;
if (buffer[i] <= 0x3f) buffer[i] = buffer[i] * 4;
else if (buffer[i] <= 0x7f) buffer[i] = (buffer[i] - 0x40) * 4 + 1;
else if (buffer[i] <= 0xbf) buffer[i] = (buffer[i] - 0x80) * 4 + 2;
else buffer[i] = (buffer[i] - 0xc0) * 4 + 3;
}
let ext = SniffAudioExt(buffer, '');
const newName = SplitFilename(raw_filename);
let audioBlob: Blob;
if (ext !== '' || newName.ext === 'mp3') {
audioBlob = new Blob([buffer], { type: AudioMimeType[ext] });
} else if (newName.ext in HandlerMap) {
audioBlob = new Blob([buffer], { type: 'application/octet-stream' });
return QmcDecrypt(audioBlob, newName.name, newName.ext);
} else {
throw '不支持的QQ音乐缓存格式';
}
const tag = await metaParseBlob(audioBlob);
const { title, artist } = GetMetaFromFile(raw_filename, tag.common.title, tag.common.artist);
return {
title,
artist,
ext,
album: tag.common.album,
picture: GetCoverFromFile(tag),
file: URL.createObjectURL(audioBlob),
blob: audioBlob,
mime: AudioMimeType[ext]
}
return {
title,
artist,
ext,
album: tag.common.album,
picture: GetCoverFromFile(tag),
file: URL.createObjectURL(audioBlob),
blob: audioBlob,
mime: AudioMimeType[ext],
};
}

50
src/decrypt/raw.ts
View File

@@ -1,28 +1,32 @@
import {AudioMimeType, GetArrayBuffer, GetCoverFromFile, GetMetaFromFile, SniffAudioExt} from "@/decrypt/utils";
import { AudioMimeType, GetArrayBuffer, GetCoverFromFile, GetMetaFromFile, SniffAudioExt } from '@/decrypt/utils';
import {DecryptResult} from "@/decrypt/entity";
import { DecryptResult } from '@/decrypt/entity';
import {parseBlob as metaParseBlob} from "music-metadata-browser";
import { parseBlob as metaParseBlob } from 'music-metadata-browser';
export async function Decrypt(file: Blob, raw_filename: string, raw_ext: string, detect: boolean = true)
: Promise<DecryptResult> {
let ext = raw_ext;
if (detect) {
const buffer = new Uint8Array(await GetArrayBuffer(file));
ext = SniffAudioExt(buffer, raw_ext);
if (ext !== raw_ext) file = new Blob([buffer], {type: AudioMimeType[ext]})
}
const tag = await metaParseBlob(file);
const {title, artist} = GetMetaFromFile(raw_filename, tag.common.title, tag.common.artist)
export async function Decrypt(
file: Blob,
raw_filename: string,
raw_ext: string,
detect: boolean = true,
): Promise<DecryptResult> {
let ext = raw_ext;
if (detect) {
const buffer = new Uint8Array(await GetArrayBuffer(file));
ext = SniffAudioExt(buffer, raw_ext);
if (ext !== raw_ext) file = new Blob([buffer], { type: AudioMimeType[ext] });
}
const tag = await metaParseBlob(file);
const { title, artist } = GetMetaFromFile(raw_filename, tag.common.title, tag.common.artist);
return {
title,
artist,
ext,
album: tag.common.album,
picture: GetCoverFromFile(tag),
file: URL.createObjectURL(file),
blob: file,
mime: AudioMimeType[ext]
}
return {
title,
artist,
ext,
album: tag.common.album,
picture: GetCoverFromFile(tag),
file: URL.createObjectURL(file),
blob: file,
mime: AudioMimeType[ext],
};
}

18
src/decrypt/tm.ts
View File

@@ -1,14 +1,14 @@
import {Decrypt as RawDecrypt} from "./raw";
import {GetArrayBuffer} from "@/decrypt/utils";
import {DecryptResult} from "@/decrypt/entity";
import { Decrypt as RawDecrypt } from './raw';
import { GetArrayBuffer } from '@/decrypt/utils';
import { DecryptResult } from '@/decrypt/entity';
const TM_HEADER = [0x00, 0x00, 0x00, 0x20, 0x66, 0x74, 0x79, 0x70];
export async function Decrypt(file: File, raw_filename: string): Promise<DecryptResult> {
const audioData = new Uint8Array(await GetArrayBuffer(file));
for (let cur = 0; cur < 8; ++cur) {
audioData[cur] = TM_HEADER[cur];
}
const musicData = new Blob([audioData], {type: "audio/mp4"});
return await RawDecrypt(musicData, raw_filename, "m4a", false)
const audioData = new Uint8Array(await GetArrayBuffer(file));
for (let cur = 0; cur < 8; ++cur) {
audioData[cur] = TM_HEADER[cur];
}
const musicData = new Blob([audioData], { type: 'audio/mp4' });
return await RawDecrypt(musicData, raw_filename, 'm4a', false);
}

267
src/decrypt/utils.ts
View File

@@ -1,177 +1,176 @@
import {IAudioMetadata} from "music-metadata-browser";
import ID3Writer from "browser-id3-writer";
import MetaFlac from "metaflac-js";
import { IAudioMetadata } from 'music-metadata-browser';
import ID3Writer from 'browser-id3-writer';
import MetaFlac from 'metaflac-js';
export const FLAC_HEADER = [0x66, 0x4C, 0x61, 0x43];
export const FLAC_HEADER = [0x66, 0x4c, 0x61, 0x43];
export const MP3_HEADER = [0x49, 0x44, 0x33];
export const OGG_HEADER = [0x4F, 0x67, 0x67, 0x53];
export const OGG_HEADER = [0x4f, 0x67, 0x67, 0x53];
export const M4A_HEADER = [0x66, 0x74, 0x79, 0x70];
export const WMA_HEADER = [
0x30, 0x26, 0xB2, 0x75, 0x8E, 0x66, 0xCF, 0x11,
0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C,
]
export const WAV_HEADER = [0x52, 0x49, 0x46, 0x46]
export const AAC_HEADER = [0xFF, 0xF1]
export const DFF_HEADER = [0x46, 0x52, 0x4D, 0x38]
0x30, 0x26, 0xb2, 0x75, 0x8e, 0x66, 0xcf, 0x11, 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c,
];
export const WAV_HEADER = [0x52, 0x49, 0x46, 0x46];
export const AAC_HEADER = [0xff, 0xf1];
export const DFF_HEADER = [0x46, 0x52, 0x4d, 0x38];
export const AudioMimeType: { [key: string]: string } = {
mp3: "audio/mpeg",
flac: "audio/flac",
m4a: "audio/mp4",
ogg: "audio/ogg",
wma: "audio/x-ms-wma",
wav: "audio/x-wav",
dff: "audio/x-dff"
mp3: 'audio/mpeg',
flac: 'audio/flac',
m4a: 'audio/mp4',
ogg: 'audio/ogg',
wma: 'audio/x-ms-wma',
wav: 'audio/x-wav',
dff: 'audio/x-dff',
};
export function BytesHasPrefix(data: Uint8Array, prefix: number[]): boolean {
if (prefix.length > data.length) return false
return prefix.every((val, idx) => {
return val === data[idx];
})
if (prefix.length > data.length) return false;
return prefix.every((val, idx) => {
return val === data[idx];
});
}
export function BytesEqual(a: Uint8Array, b: Uint8Array,): boolean {
if (a.length !== b.length) return false
return a.every((val, idx) => {
return val === b[idx];
})
export function BytesEqual(a: Uint8Array, b: Uint8Array): boolean {
if (a.length !== b.length) return false;
return a.every((val, idx) => {
return val === b[idx];
});
}
export function SniffAudioExt(data: Uint8Array, fallback_ext: string = "mp3"): string {
if (BytesHasPrefix(data, MP3_HEADER)) return "mp3"
if (BytesHasPrefix(data, FLAC_HEADER)) return "flac"
if (BytesHasPrefix(data, OGG_HEADER)) return "ogg"
if (data.length >= 4 + M4A_HEADER.length &&
BytesHasPrefix(data.slice(4), M4A_HEADER)) return "m4a"
if (BytesHasPrefix(data, WAV_HEADER)) return "wav"
if (BytesHasPrefix(data, WMA_HEADER)) return "wma"
if (BytesHasPrefix(data, AAC_HEADER)) return "aac"
if (BytesHasPrefix(data, DFF_HEADER)) return "dff"
return fallback_ext;
export function SniffAudioExt(data: Uint8Array, fallback_ext: string = 'mp3'): string {
if (BytesHasPrefix(data, MP3_HEADER)) return 'mp3';
if (BytesHasPrefix(data, FLAC_HEADER)) return 'flac';
if (BytesHasPrefix(data, OGG_HEADER)) return 'ogg';
if (data.length >= 4 + M4A_HEADER.length && BytesHasPrefix(data.slice(4), M4A_HEADER)) return 'm4a';
if (BytesHasPrefix(data, WAV_HEADER)) return 'wav';
if (BytesHasPrefix(data, WMA_HEADER)) return 'wma';
if (BytesHasPrefix(data, AAC_HEADER)) return 'aac';
if (BytesHasPrefix(data, DFF_HEADER)) return 'dff';
return fallback_ext;
}
export function GetArrayBuffer(obj: Blob): Promise<ArrayBuffer> {
if (!!obj.arrayBuffer) return obj.arrayBuffer()
return new Promise((resolve, reject) => {
const reader = new FileReader();
reader.onload = (e) => {
const rs = e.target?.result
if (!rs) {
reject("read file failed")
} else {
resolve(rs as ArrayBuffer)
}
};
reader.readAsArrayBuffer(obj);
});
if (!!obj.arrayBuffer) return obj.arrayBuffer();
return new Promise((resolve, reject) => {
const reader = new FileReader();
reader.onload = (e) => {
const rs = e.target?.result;
if (!rs) {
reject('read file failed');
} else {
resolve(rs as ArrayBuffer);
}
};
reader.readAsArrayBuffer(obj);
});
}
export function GetCoverFromFile(metadata: IAudioMetadata): string {
if (metadata.common?.picture && metadata.common.picture.length > 0) {
return URL.createObjectURL(new Blob(
[metadata.common.picture[0].data],
{type: metadata.common.picture[0].format}
));
}
return "";
if (metadata.common?.picture && metadata.common.picture.length > 0) {
return URL.createObjectURL(
new Blob([metadata.common.picture[0].data], { type: metadata.common.picture[0].format }),
);
}
return '';
}
export interface IMusicMetaBasic {
title: string
artist?: string
title: string;
artist?: string;
}
export function GetMetaFromFile(filename: string, exist_title?: string, exist_artist?: string, separator = "-")
: IMusicMetaBasic {
const meta: IMusicMetaBasic = {title: exist_title ?? "", artist: exist_artist}
export function GetMetaFromFile(
filename: string,
exist_title?: string,
exist_artist?: string,
separator = '-',
): IMusicMetaBasic {
const meta: IMusicMetaBasic = { title: exist_title ?? '', artist: exist_artist };
const items = filename.split(separator);
if (items.length > 1) {
if (!meta.artist) meta.artist = items[0].trim();
if (!meta.title) meta.title = items[1].trim();
} else if (items.length === 1) {
if (!meta.title) meta.title = items[0].trim();
const items = filename.split(separator);
if (items.length > 1) {
if (!meta.artist) meta.artist = items[0].trim();
if (!meta.title) meta.title = items[1].trim();
} else if (items.length === 1) {
if (!meta.title) meta.title = items[0].trim();
}
return meta;
}
export async function GetImageFromURL(
src: string,
): Promise<{ mime: string; buffer: ArrayBuffer; url: string } | undefined> {
try {
const resp = await fetch(src);
const mime = resp.headers.get('Content-Type');
if (mime?.startsWith('image/')) {
const buffer = await resp.arrayBuffer();
const url = URL.createObjectURL(new Blob([buffer], { type: mime }));
return { buffer, url, mime };
}
return meta
} catch (e) {
console.warn(e);
}
}
export async function GetImageFromURL(src: string):
Promise<{ mime: string; buffer: ArrayBuffer; url: string } | undefined> {
try {
const resp = await fetch(src);
const mime = resp.headers.get("Content-Type");
if (mime?.startsWith("image/")) {
const buffer = await resp.arrayBuffer();
const url = URL.createObjectURL(new Blob([buffer], {type: mime}))
return {buffer, url, mime}
}
} catch (e) {
console.warn(e)
}
}
export interface IMusicMeta {
title: string
artists?: string[]
album?: string
picture?: ArrayBuffer
picture_desc?: string
title: string;
artists?: string[];
album?: string;
picture?: ArrayBuffer;
picture_desc?: string;
}
export function WriteMetaToMp3(audioData: Buffer, info: IMusicMeta, original: IAudioMetadata) {
const writer = new ID3Writer(audioData);
const writer = new ID3Writer(audioData);
// reserve original data
const frames = original.native['ID3v2.4'] || original.native['ID3v2.3'] || original.native['ID3v2.2'] || []
frames.forEach(frame => {
if (frame.id !== 'TPE1' && frame.id !== 'TIT2' && frame.id !== 'TALB') {
try {
writer.setFrame(frame.id, frame.value)
} catch (e) {
}
}
})
const old = original.common
writer.setFrame('TPE1', old?.artists || info.artists || [])
.setFrame('TIT2', old?.title || info.title)
.setFrame('TALB', old?.album || info.album || "");
if (info.picture) {
writer.setFrame('APIC', {
type: 3,
data: info.picture,
description: info.picture_desc || "Cover",
})
// reserve original data
const frames = original.native['ID3v2.4'] || original.native['ID3v2.3'] || original.native['ID3v2.2'] || [];
frames.forEach((frame) => {
if (frame.id !== 'TPE1' && frame.id !== 'TIT2' && frame.id !== 'TALB') {
try {
writer.setFrame(frame.id, frame.value);
} catch (e) {}
}
return writer.addTag();
});
const old = original.common;
writer
.setFrame('TPE1', old?.artists || info.artists || [])
.setFrame('TIT2', old?.title || info.title)
.setFrame('TALB', old?.album || info.album || '');
if (info.picture) {
writer.setFrame('APIC', {
type: 3,
data: info.picture,
description: info.picture_desc || 'Cover',
});
}
return writer.addTag();
}
export function WriteMetaToFlac(audioData: Buffer, info: IMusicMeta, original: IAudioMetadata) {
const writer = new MetaFlac(audioData)
const old = original.common
if (!old.title && !old.album && old.artists) {
writer.setTag("TITLE=" + info.title)
writer.setTag("ALBUM=" + info.album)
if (info.artists) {
writer.removeTag("ARTIST")
info.artists.forEach(artist => writer.setTag("ARTIST=" + artist))
}
const writer = new MetaFlac(audioData);
const old = original.common;
if (!old.title && !old.album && old.artists) {
writer.setTag('TITLE=' + info.title);
writer.setTag('ALBUM=' + info.album);
if (info.artists) {
writer.removeTag('ARTIST');
info.artists.forEach((artist) => writer.setTag('ARTIST=' + artist));
}
}
if (info.picture) {
writer.importPictureFromBuffer(Buffer.from(info.picture))
}
return writer.save()
if (info.picture) {
writer.importPictureFromBuffer(Buffer.from(info.picture));
}
return writer.save();
}
export function SplitFilename(n: string): { name: string; ext: string } {
const pos = n.lastIndexOf(".")
return {
ext: n.substring(pos + 1).toLowerCase(),
name: n.substring(0, pos)
}
const pos = n.lastIndexOf('.');
return {
ext: n.substring(pos + 1).toLowerCase(),
name: n.substring(0, pos),
};
}

109
src/decrypt/xm.ts
View File

@@ -1,66 +1,67 @@
import {Decrypt as RawDecrypt} from "@/decrypt/raw";
import {DecryptResult} from "@/decrypt/entity";
import {AudioMimeType, BytesHasPrefix, GetArrayBuffer, GetCoverFromFile, GetMetaFromFile} from "@/decrypt/utils";
import { Decrypt as RawDecrypt } from '@/decrypt/raw';
import { DecryptResult } from '@/decrypt/entity';
import { AudioMimeType, BytesHasPrefix, GetArrayBuffer, GetCoverFromFile, GetMetaFromFile } from '@/decrypt/utils';
import {parseBlob as metaParseBlob} from "music-metadata-browser";
import { parseBlob as metaParseBlob } from 'music-metadata-browser';
const MagicHeader = [0x69, 0x66, 0x6D, 0x74]
const MagicHeader2 = [0xfe, 0xfe, 0xfe, 0xfe]
const MagicHeader = [0x69, 0x66, 0x6d, 0x74];
const MagicHeader2 = [0xfe, 0xfe, 0xfe, 0xfe];
const FileTypeMap: { [key: string]: string } = {
" WAV": ".wav",
"FLAC": ".flac",
" MP3": ".mp3",
" A4M": ".m4a",
}
' WAV': '.wav',
FLAC: '.flac',
' MP3': '.mp3',
' A4M': '.m4a',
};
export async function Decrypt(file: File, raw_filename: string, raw_ext: string): Promise<DecryptResult> {
const oriData = new Uint8Array(await GetArrayBuffer(file));
if (!BytesHasPrefix(oriData, MagicHeader) || !BytesHasPrefix(oriData.slice(8, 12), MagicHeader2)) {
if (raw_ext === "xm") {
throw Error("此xm文件已损坏")
} else {
return await RawDecrypt(file, raw_filename, raw_ext, true)
}
const oriData = new Uint8Array(await GetArrayBuffer(file));
if (!BytesHasPrefix(oriData, MagicHeader) || !BytesHasPrefix(oriData.slice(8, 12), MagicHeader2)) {
if (raw_ext === 'xm') {
throw Error('此xm文件已损坏');
} else {
return await RawDecrypt(file, raw_filename, raw_ext, true);
}
}
let typeText = (new TextDecoder()).decode(oriData.slice(4, 8))
if (!FileTypeMap.hasOwnProperty(typeText)) {
throw Error("未知的.xm文件类型")
}
let typeText = new TextDecoder().decode(oriData.slice(4, 8));
if (!FileTypeMap.hasOwnProperty(typeText)) {
throw Error('未知的.xm文件类型');
}
let key = oriData[0xf]
let dataOffset = oriData[0xc] | oriData[0xd] << 8 | oriData[0xe] << 16
let audioData = oriData.slice(0x10);
let lenAudioData = audioData.length;
for (let cur = dataOffset; cur < lenAudioData; ++cur)
audioData[cur] = (audioData[cur] - key) ^ 0xff;
let key = oriData[0xf];
let dataOffset = oriData[0xc] | (oriData[0xd] << 8) | (oriData[0xe] << 16);
let audioData = oriData.slice(0x10);
let lenAudioData = audioData.length;
for (let cur = dataOffset; cur < lenAudioData; ++cur) audioData[cur] = (audioData[cur] - key) ^ 0xff;
const ext = FileTypeMap[typeText];
const mime = AudioMimeType[ext];
let musicBlob = new Blob([audioData], {type: mime});
const ext = FileTypeMap[typeText];
const mime = AudioMimeType[ext];
let musicBlob = new Blob([audioData], { type: mime });
const musicMeta = await metaParseBlob(musicBlob);
if (ext === "wav") {
//todo:未知的编码方式
console.info(musicMeta.common)
musicMeta.common.album = "";
musicMeta.common.artist = "";
musicMeta.common.title = "";
}
const {title, artist} = GetMetaFromFile(raw_filename,
musicMeta.common.title, musicMeta.common.artist,
raw_filename.indexOf("_") === -1 ? "-" : "_")
const musicMeta = await metaParseBlob(musicBlob);
if (ext === 'wav') {
//todo:未知的编码方式
console.info(musicMeta.common);
musicMeta.common.album = '';
musicMeta.common.artist = '';
musicMeta.common.title = '';
}
const { title, artist } = GetMetaFromFile(
raw_filename,
musicMeta.common.title,
musicMeta.common.artist,
raw_filename.indexOf('_') === -1 ? '-' : '_',
);
return {
title,
artist,
ext,
mime,
album: musicMeta.common.album,
picture: GetCoverFromFile(musicMeta),
file: URL.createObjectURL(musicBlob),
blob: musicBlob,
rawExt: "xm"
}
return {
title,
artist,
ext,
mime,
album: musicMeta.common.album,
picture: GetCoverFromFile(musicMeta),
file: URL.createObjectURL(musicBlob),
blob: musicBlob,
rawExt: 'xm',
};
}