refactor(.ncm): typescript & class
This commit is contained in:
Emmm Monster
parent
37a641e69e
commit
15dba7b92f
6
package-lock.json
generated
6
package-lock.json
generated
@ -1722,6 +1722,12 @@
|
||||
"@types/node": "*"
|
||||
}
|
||||
},
|
||||
"@types/crypto-js": {
|
||||
"version": "4.0.1",
|
||||
"resolved": "http://mirrors.cloud.tencent.com/npm/@types%2fcrypto-js/-/crypto-js-4.0.1.tgz",
|
||||
"integrity": "sha512-6+OPzqhKX/cx5xh+yO8Cqg3u3alrkhoxhE5ZOdSEv0DOzJ13lwJ6laqGU0Kv6+XDMFmlnGId04LtY22PsFLQUw==",
|
||||
"dev": true
|
||||
},
|
||||
"@types/debug": {
|
||||
"version": "4.1.5",
|
||||
"resolved": "https://registry.npmjs.org/@types/debug/-/debug-4.1.5.tgz",
|
||||
|
||||
@ -31,6 +31,7 @@
|
||||
"vue-property-decorator": "^9.1.2"
|
||||
},
|
||||
"devDependencies": {
|
||||
"@types/crypto-js": "^4.0.1",
|
||||
"@vue/cli-plugin-babel": "^4.5.13",
|
||||
"@vue/cli-plugin-pwa": "^4.5.13",
|
||||
"@vue/cli-plugin-typescript": "^4.5.13",
|
||||
|
||||
@ -9,7 +9,7 @@ export interface DecryptResult {
|
||||
ext: string
|
||||
|
||||
file: string
|
||||
picture: string
|
||||
picture?: string
|
||||
|
||||
message?: string
|
||||
rawExt?: string
|
||||
|
||||
@ -1,171 +0,0 @@
|
||||
import {
|
||||
AudioMimeType,
|
||||
BytesHasPrefix,
|
||||
GetArrayBuffer,
|
||||
GetImageFromURL,
|
||||
GetMetaFromFile,
|
||||
SniffAudioExt, WriteMetaToFlac, WriteMetaToMp3
|
||||
} from "@/decrypt/utils.ts";
|
||||
import {parseBlob as metaParseBlob} from "music-metadata-browser";
|
||||
import jimp from 'jimp';
|
||||
|
||||
const CryptoJS = require("crypto-js");
|
||||
const CORE_KEY = CryptoJS.enc.Hex.parse("687a4852416d736f356b496e62617857");
|
||||
const META_KEY = CryptoJS.enc.Hex.parse("2331346C6A6B5F215C5D2630553C2728");
|
||||
const MagicHeader = [0x43, 0x54, 0x45, 0x4E, 0x46, 0x44, 0x41, 0x4D];
|
||||
|
||||
|
||||
export async function Decrypt(file, raw_filename, _) {
|
||||
const fileBuffer = await GetArrayBuffer(file);
|
||||
const dataView = new DataView(fileBuffer);
|
||||
|
||||
if (!BytesHasPrefix(new Uint8Array(fileBuffer, 0, 8), MagicHeader))
|
||||
return {status: false, message: "此ncm文件已损坏"};
|
||||
|
||||
const keyDataObj = getKeyData(dataView, fileBuffer, 10);
|
||||
const keyBox = getKeyBox(keyDataObj.data);
|
||||
|
||||
const musicMetaObj = getMetaData(dataView, fileBuffer, keyDataObj.offset);
|
||||
const musicMeta = musicMetaObj.data;
|
||||
let audioOffset = musicMetaObj.offset + dataView.getUint32(musicMetaObj.offset + 5, true) + 13;
|
||||
let audioData = new Uint8Array(fileBuffer, audioOffset);
|
||||
|
||||
let lenAudioData = audioData.length;
|
||||
for (let cur = 0; cur < lenAudioData; ++cur) audioData[cur] ^= keyBox[cur & 0xff];
|
||||
|
||||
if (musicMeta.album === undefined) musicMeta.album = "";
|
||||
|
||||
const artists = [];
|
||||
if (!!musicMeta.artist) musicMeta.artist.forEach(arr => artists.push(arr[0]));
|
||||
const info = GetMetaFromFile(raw_filename, musicMeta.musicName, artists.join("; "))
|
||||
if (artists.length === 0) artists.push(info.artist);
|
||||
|
||||
if (musicMeta.format === undefined) musicMeta.format = SniffAudioExt(audioData);
|
||||
|
||||
const imageInfo = await GetImageFromURL(musicMeta.albumPic);
|
||||
|
||||
const mime = AudioMimeType[musicMeta.format]
|
||||
try {
|
||||
let musicBlob = new Blob([audioData], {type: mime});
|
||||
const originalMeta = await metaParseBlob(musicBlob);
|
||||
let shouldWrite = !originalMeta.common.album && !originalMeta.common.artists && !originalMeta.common.title
|
||||
if (shouldWrite || imageInfo) {
|
||||
while (imageInfo && imageInfo.buffer.byteLength >= 1 << 24) {
|
||||
let img = await jimp.read(Buffer.from(imageInfo.buffer))
|
||||
await img.resize(Math.round(img.getHeight() / 2), jimp.AUTO)
|
||||
imageInfo.buffer = await img.getBufferAsync("image/jpeg")
|
||||
}
|
||||
const newMeta = {title: info.title, artists, album: musicMeta.album, picture: imageInfo?.buffer}
|
||||
if (musicMeta.format === "mp3") {
|
||||
audioData = WriteMetaToMp3(audioData.buffer, newMeta, originalMeta)
|
||||
} else if (musicMeta.format === "flac") {
|
||||
audioData = WriteMetaToFlac(Buffer.from(audioData), newMeta, originalMeta)
|
||||
}
|
||||
}
|
||||
} catch (e) {
|
||||
console.warn("Error while appending cover image to file ", e)
|
||||
}
|
||||
|
||||
const musicData = new Blob([audioData], {type: mime})
|
||||
|
||||
return {
|
||||
status: true,
|
||||
title: info.title,
|
||||
artist: info.artist,
|
||||
ext: musicMeta.format,
|
||||
album: musicMeta.album,
|
||||
picture: imageInfo.url,
|
||||
file: URL.createObjectURL(musicData),
|
||||
mime: mime
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
function getKeyData(dataView, fileBuffer, offset) {
|
||||
const keyLen = dataView.getUint32(offset, true);
|
||||
offset += 4;
|
||||
const cipherText = new Uint8Array(fileBuffer, offset, keyLen).map(
|
||||
uint8 => uint8 ^ 0x64
|
||||
);
|
||||
offset += keyLen;
|
||||
|
||||
const plainText = CryptoJS.AES.decrypt(
|
||||
{ciphertext: CryptoJS.lib.WordArray.create(cipherText)},
|
||||
CORE_KEY,
|
||||
{
|
||||
mode: CryptoJS.mode.ECB,
|
||||
padding: CryptoJS.pad.Pkcs7
|
||||
}
|
||||
);
|
||||
|
||||
const result = new Uint8Array(plainText.sigBytes);
|
||||
|
||||
const words = plainText.words;
|
||||
const sigBytes = plainText.sigBytes;
|
||||
for (let i = 0; i < sigBytes; i++) {
|
||||
result[i] = (words[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff;
|
||||
}
|
||||
|
||||
return {offset: offset, data: result.slice(17)};
|
||||
}
|
||||
|
||||
function getKeyBox(keyData) {
|
||||
const box = new Uint8Array(Array(256).keys());
|
||||
|
||||
const keyDataLen = keyData.length;
|
||||
|
||||
let j = 0;
|
||||
|
||||
for (let i = 0; i < 256; i++) {
|
||||
j = (box[i] + j + keyData[i % keyDataLen]) & 0xff;
|
||||
[box[i], box[j]] = [box[j], box[i]];
|
||||
}
|
||||
|
||||
return box.map((_, i, arr) => {
|
||||
i = (i + 1) & 0xff;
|
||||
const si = arr[i];
|
||||
const sj = arr[(i + si) & 0xff];
|
||||
return arr[(si + sj) & 0xff];
|
||||
});
|
||||
}
|
||||
|
||||
/**
|
||||
* @typedef {Object} MusicMetaType
|
||||
* @property {Number} musicId
|
||||
* @property {String} musicName
|
||||
* @property {[[String, Number]]} artist
|
||||
* @property {String} album
|
||||
* @property {"flac"|"mp3"} format
|
||||
* @property {String} albumPic
|
||||
*/
|
||||
|
||||
function getMetaData(dataView, fileBuffer, offset) {
|
||||
const metaDataLen = dataView.getUint32(offset, true);
|
||||
offset += 4;
|
||||
if (metaDataLen === 0) return {data: {}, offset: offset};
|
||||
|
||||
const cipherText = new Uint8Array(fileBuffer, offset, metaDataLen).map(
|
||||
data => data ^ 0x63
|
||||
);
|
||||
offset += metaDataLen;
|
||||
|
||||
const plainText = CryptoJS.AES.decrypt({
|
||||
ciphertext: CryptoJS.enc.Base64.parse(
|
||||
CryptoJS.lib.WordArray.create(cipherText.slice(22)).toString(CryptoJS.enc.Utf8)
|
||||
)
|
||||
},
|
||||
META_KEY,
|
||||
{mode: CryptoJS.mode.ECB, padding: CryptoJS.pad.Pkcs7}
|
||||
).toString(CryptoJS.enc.Utf8);
|
||||
const labelIndex = plainText.indexOf(":");
|
||||
let result = JSON.parse(plainText.slice(labelIndex + 1));
|
||||
if (plainText.slice(0, labelIndex) === "dj") {
|
||||
result = result.mainMusic;
|
||||
}
|
||||
if (!!result.albumPic && result.albumPic !== "")
|
||||
result.albumPic = result.albumPic.replace("http://", "https://") + "?param=500y500";
|
||||
|
||||
return {data: result, offset: offset};
|
||||
}
|
||||
|
||||
|
||||
235
src/decrypt/ncm.ts
Normal file
235
src/decrypt/ncm.ts
Normal file
@ -0,0 +1,235 @@
|
||||
import {
|
||||
AudioMimeType,
|
||||
BytesHasPrefix,
|
||||
GetArrayBuffer,
|
||||
GetImageFromURL,
|
||||
GetMetaFromFile, IMusicMeta,
|
||||
SniffAudioExt,
|
||||
WriteMetaToFlac,
|
||||
WriteMetaToMp3
|
||||
} from "@/decrypt/utils.ts";
|
||||
import {parseBlob as metaParseBlob} from "music-metadata-browser";
|
||||
import jimp from 'jimp';
|
||||
|
||||
import CryptoJS from "crypto-js";
|
||||
import {DecryptResult} from "@/decrypt/entity";
|
||||
|
||||
const CORE_KEY = CryptoJS.enc.Hex.parse("687a4852416d736f356b496e62617857");
|
||||
const META_KEY = CryptoJS.enc.Hex.parse("2331346C6A6B5F215C5D2630553C2728");
|
||||
const MagicHeader = [0x43, 0x54, 0x45, 0x4E, 0x46, 0x44, 0x41, 0x4D];
|
||||
|
||||
|
||||
export async function Decrypt(file: File, raw_filename: string, _: string): Promise<DecryptResult> {
|
||||
return (new NcmDecrypt(await GetArrayBuffer(file), raw_filename)).decrypt()
|
||||
}
|
||||
|
||||
|
||||
interface NcmMusicMeta {
|
||||
//musicId: number
|
||||
musicName?: string
|
||||
artist?: Array<string | number>[]
|
||||
format?: string
|
||||
album?: string
|
||||
albumPic?: string
|
||||
}
|
||||
|
||||
interface NcmDjMeta {
|
||||
mainMusic: NcmMusicMeta
|
||||
}
|
||||
|
||||
|
||||
class NcmDecrypt {
|
||||
raw: ArrayBuffer
|
||||
view: DataView
|
||||
offset: number = 0
|
||||
filename: string
|
||||
format: string = ""
|
||||
mime: string = ""
|
||||
audio?: Uint8Array
|
||||
blob?: Blob
|
||||
oriMeta?: NcmMusicMeta
|
||||
newMeta?: IMusicMeta
|
||||
image?: { mime: string, buffer: ArrayBuffer, url: string }
|
||||
|
||||
constructor(buf: ArrayBuffer, filename: string) {
|
||||
const prefix = new Uint8Array(buf, 0, 8)
|
||||
if (!BytesHasPrefix(prefix, MagicHeader)) throw Error("此ncm文件已损坏")
|
||||
this.offset = 10
|
||||
this.raw = buf
|
||||
this.view = new DataView(buf)
|
||||
this.filename = filename
|
||||
}
|
||||
|
||||
_getKeyData(): Uint8Array {
|
||||
const keyLen = this.view.getUint32(this.offset, true);
|
||||
this.offset += 4;
|
||||
const cipherText = new Uint8Array(this.raw, this.offset, keyLen)
|
||||
.map(uint8 => uint8 ^ 0x64);
|
||||
this.offset += keyLen;
|
||||
|
||||
const plainText = CryptoJS.AES.decrypt(
|
||||
// @ts-ignore
|
||||
{ciphertext: CryptoJS.lib.WordArray.create(cipherText)},
|
||||
CORE_KEY,
|
||||
{mode: CryptoJS.mode.ECB, padding: CryptoJS.pad.Pkcs7}
|
||||
);
|
||||
|
||||
const result = new Uint8Array(plainText.sigBytes);
|
||||
|
||||
const words = plainText.words;
|
||||
const sigBytes = plainText.sigBytes;
|
||||
for (let i = 0; i < sigBytes; i++) {
|
||||
result[i] = (words[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff;
|
||||
}
|
||||
|
||||
return result.slice(17)
|
||||
}
|
||||
|
||||
_getKeyBox(): Uint8Array {
|
||||
const keyData = this._getKeyData()
|
||||
const box = new Uint8Array(Array(256).keys());
|
||||
|
||||
const keyDataLen = keyData.length;
|
||||
|
||||
let j = 0;
|
||||
|
||||
for (let i = 0; i < 256; i++) {
|
||||
j = (box[i] + j + keyData[i % keyDataLen]) & 0xff;
|
||||
[box[i], box[j]] = [box[j], box[i]];
|
||||
}
|
||||
|
||||
return box.map((_, i, arr) => {
|
||||
i = (i + 1) & 0xff;
|
||||
const si = arr[i];
|
||||
const sj = arr[(i + si) & 0xff];
|
||||
return arr[(si + sj) & 0xff];
|
||||
});
|
||||
}
|
||||
|
||||
_getMetaData(): NcmMusicMeta {
|
||||
const metaDataLen = this.view.getUint32(this.offset, true);
|
||||
this.offset += 4;
|
||||
if (metaDataLen === 0) return {};
|
||||
|
||||
const cipherText = new Uint8Array(this.raw, this.offset, metaDataLen)
|
||||
.map(data => data ^ 0x63);
|
||||
this.offset += metaDataLen;
|
||||
|
||||
const plainText = CryptoJS.AES.decrypt(
|
||||
//@ts-ignore
|
||||
{
|
||||
ciphertext: CryptoJS.enc.Base64.parse(
|
||||
//@ts-ignore
|
||||
CryptoJS.lib.WordArray.create(cipherText.slice(22)).toString(CryptoJS.enc.Utf8)
|
||||
)
|
||||
},
|
||||
META_KEY,
|
||||
{mode: CryptoJS.mode.ECB, padding: CryptoJS.pad.Pkcs7}
|
||||
).toString(CryptoJS.enc.Utf8);
|
||||
|
||||
const labelIndex = plainText.indexOf(":");
|
||||
let result: NcmMusicMeta;
|
||||
if (plainText.slice(0, labelIndex) === "dj") {
|
||||
const tmp: NcmDjMeta = JSON.parse(plainText.slice(labelIndex + 1));
|
||||
result = tmp.mainMusic;
|
||||
} else {
|
||||
result = JSON.parse(plainText.slice(labelIndex + 1));
|
||||
}
|
||||
if (!!result.albumPic) {
|
||||
result.albumPic = result.albumPic.replace("http://", "https://") + "?param=500y500"
|
||||
}
|
||||
return result
|
||||
}
|
||||
|
||||
_getAudio(keyBox: Uint8Array): Uint8Array {
|
||||
this.offset += this.view.getUint32(this.offset + 5, true) + 13
|
||||
const audioData = new Uint8Array(this.raw, this.offset)
|
||||
let lenAudioData = audioData.length
|
||||
for (let cur = 0; cur < lenAudioData; ++cur) audioData[cur] ^= keyBox[cur & 0xff]
|
||||
return audioData
|
||||
}
|
||||
|
||||
async _buildMeta() {
|
||||
if (!this.oriMeta) throw Error("invalid sequence")
|
||||
|
||||
const info = GetMetaFromFile(this.filename, this.oriMeta.musicName)
|
||||
|
||||
// build artists
|
||||
let artists: string[] = [];
|
||||
if (!!this.oriMeta.artist) {
|
||||
this.oriMeta.artist.forEach(arr => artists.push(<string>arr[0]));
|
||||
}
|
||||
|
||||
if (artists.length === 0 && !!info.artist) {
|
||||
artists = info.artist.split(',')
|
||||
.map(val => val.trim()).filter(val => val != "");
|
||||
}
|
||||
|
||||
if (this.oriMeta.albumPic) try {
|
||||
this.image = await GetImageFromURL(this.oriMeta.albumPic)
|
||||
while (this.image && this.image.buffer.byteLength >= 1 << 24) {
|
||||
let img = await jimp.read(Buffer.from(this.image.buffer))
|
||||
await img.resize(Math.round(img.getHeight() / 2), jimp.AUTO)
|
||||
this.image.buffer = await img.getBufferAsync("image/jpeg")
|
||||
}
|
||||
} catch (e) {
|
||||
console.log("get cover image failed", e)
|
||||
}
|
||||
|
||||
|
||||
this.newMeta = {title: info.title, artists, album: this.oriMeta.album, picture: this.image?.buffer}
|
||||
}
|
||||
|
||||
async _writeMeta() {
|
||||
if (!this.audio || !this.newMeta) throw Error("invalid sequence")
|
||||
|
||||
if (!this.blob) this.blob = new Blob([this.audio], {type: this.mime})
|
||||
const ori = await metaParseBlob(this.blob);
|
||||
|
||||
let shouldWrite = !ori.common.album && !ori.common.artists && !ori.common.title
|
||||
if (shouldWrite || this.newMeta.picture) {
|
||||
if (this.format === "mp3") {
|
||||
this.audio = WriteMetaToMp3(Buffer.from(this.audio), this.newMeta, ori)
|
||||
} else if (this.format === "flac") {
|
||||
this.audio = WriteMetaToFlac(Buffer.from(this.audio), this.newMeta, ori)
|
||||
} else {
|
||||
console.info(`writing meta for ${this.format} is not being supported for now`)
|
||||
return
|
||||
}
|
||||
this.blob = new Blob([this.audio], {type: this.mime})
|
||||
}
|
||||
}
|
||||
|
||||
gatherResult(): DecryptResult {
|
||||
if (!this.newMeta) throw Error("bad sequence")
|
||||
return {
|
||||
status: true,
|
||||
title: this.newMeta.title,
|
||||
artist: this.newMeta.artists?.join("; "),
|
||||
ext: this.format,
|
||||
album: this.newMeta.album,
|
||||
picture: this.image?.url,
|
||||
file: URL.createObjectURL(this.blob),
|
||||
mime: this.mime
|
||||
}
|
||||
}
|
||||
|
||||
async decrypt() {
|
||||
const keyBox = this._getKeyBox()
|
||||
this.oriMeta = this._getMetaData()
|
||||
this.audio = this._getAudio(keyBox)
|
||||
this.format = this.oriMeta.format || SniffAudioExt(this.audio)
|
||||
this.mime = AudioMimeType[this.format]
|
||||
await this._buildMeta()
|
||||
try {
|
||||
await this._writeMeta()
|
||||
} catch (e) {
|
||||
console.warn("write meta data failed", e)
|
||||
}
|
||||
return this.gatherResult()
|
||||
}
|
||||
|
||||
|
||||
}
|
||||
|
||||
|
||||
@ -119,7 +119,7 @@ export interface IMusicMeta {
|
||||
picture_desc?: string
|
||||
}
|
||||
|
||||
export function WriteMetaToMp3(audioData: ArrayBuffer, info: IMusicMeta, original: IAudioMetadata) {
|
||||
export function WriteMetaToMp3(audioData: Buffer, info: IMusicMeta, original: IAudioMetadata) {
|
||||
const writer = new ID3Writer(audioData);
|
||||
|
||||
// reserve original data
|
||||
|
||||
2
src/shims-browser-id3-writer.d.ts
vendored
2
src/shims-browser-id3-writer.d.ts
vendored
@ -4,7 +4,7 @@ declare module "browser-id3-writer" {
|
||||
|
||||
setFrame(name: string, value: string | object | string[])
|
||||
|
||||
addTag(): ArrayBuffer
|
||||
addTag(): Uint8Array
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user