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MengYX
2020-01-21 19:03:41 +08:00
parent e108f7c016
commit 8267148e96
9 changed files with 323 additions and 346 deletions
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124
src/plugins/mflac.js
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@@ -1,124 +0,0 @@
const musicMetadata = require("music-metadata-browser");
export {Decrypt}
async function Decrypt(file) {
// 获取扩展名
let filename_ext = file.name.substring(file.name.lastIndexOf(".") + 1, file.name.length).toLowerCase();
if (filename_ext !== "mflac") return {
status: false,
message: "File type is incorrect!",
};
// 读取文件
const fileBuffer = await new Promise(resolve => {
const reader = new FileReader();
reader.onload = (e) => {
resolve(e.target.result);
};
reader.readAsArrayBuffer(file);
});
const audioData = new Uint8Array(fileBuffer.slice(0, -0x170));
const audioDataLen = audioData.length;
// 转换数据
const seed = new Mask();
if (!seed.DetectMask(audioData)) return{
status: false,
message: "此音乐无法解锁，目前mflac格式不提供完整支持",
};
for (let cur = 0; cur < audioDataLen; ++cur) {
audioData[cur] ^= seed.NextMask();
}
// 导出
const musicData = new Blob([audioData], {type: "audio/flac"});
const musicUrl = URL.createObjectURL(musicData);
// 读取Meta
let tag = await musicMetadata.parseBlob(musicData);
// 处理无标题歌手
let filename_array = file.name.substring(0, file.name.lastIndexOf(".")).split("-");
let title = tag.common.title;
let artist = tag.common.artist;
if (filename_array.length > 1) {
if (artist === undefined) artist = filename_array[0].trim();
if (title === undefined) title = filename_array[1].trim();
} else if (filename_array.length === 1) {
if (title === undefined) title = filename_array[0].trim();
}
const filename = artist + " - " + title + ".flac";
// 处理无封面
let pic_url = "";
if (tag.common.picture !== undefined && tag.common.picture.length >= 1) {
const picture = tag.common.picture[0];
const blobPic = new Blob([picture.data], {type: picture.format});
pic_url = URL.createObjectURL(blobPic);
}
// 返回*/
return {
status: true,
message: "",
filename: filename,
title: title,
artist: artist,
album: tag.common.album,
picture: pic_url,
file: musicUrl,
mime: "audio/flac"
}
}
class Mask {
FLAC_HEADER = [0x66, 0x4C, 0x61, 0x43, 0x00];
constructor() {
this.index = -1;
this.mask_index = -1;
this.mask = Array(128).fill(0x00);
}
DetectMask(data) {
let search_len = data.length - 256, mask;
for (let block_idx = 0; block_idx < search_len; block_idx += 128) {
let flag = true;
mask = data.slice(block_idx, block_idx + 128);
let next_mask = data.slice(block_idx + 128, block_idx + 256);
for (let idx = 0; idx < 128; idx++) {
if (mask[idx] !== next_mask[idx]) {
flag = false;
break;
}
}
if (!flag) continue;
for (let test_idx = 0; test_idx < this.FLAC_HEADER.length; test_idx++) {
let p = data[test_idx] ^ mask[test_idx];
if (p !== this.FLAC_HEADER[test_idx]) {
flag = false;
debugger;
break;
}
}
if (!flag) continue;
this.mask = mask;
return true;
}
return false;
}
NextMask() {
this.index++;
this.mask_index++;
if (this.index === 0x8000 || (this.index > 0x8000 && (this.index + 1) % 0x8000 === 0)) {
this.index++;
this.mask_index++;
}
if (this.mask_index >= 128) {
this.mask_index -= 128;
}
return this.mask[this.mask_index]
}
}

183
src/plugins/ncm.js
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@@ -1,183 +0,0 @@
const CryptoJS = require("crypto-js");
const ID3Writer = require("browser-id3-writer");
const CORE_KEY = CryptoJS.enc.Hex.parse("687a4852416d736f356b496e62617857");
const META_KEY = CryptoJS.enc.Hex.parse("2331346C6A6B5F215C5D2630553C2728");
const audio_mime_type = {
mp3: "audio/mpeg",
flac: "audio/flac"
};
export {Decrypt};
async function Decrypt(file) {
const fileBuffer = await new Promise(reslove => {
const reader = new FileReader();
reader.onload = (e) => {
reslove(e.target.result);
};
reader.readAsArrayBuffer(file);
});
const dataView = new DataView(fileBuffer);
if (dataView.getUint32(0, true) !== 0x4e455443 ||
dataView.getUint32(4, true) !== 0x4d414446
) return {
status: false,
message: "此ncm文件已损坏",
};
let offset = 10;
const keyData = (() => {
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 result.slice(17);
})();
const keyBox = (() => {
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
*/
/** @type {MusicMetaType|undefined} */
const musicMeta = (() => {
const metaDataLen = dataView.getUint32(offset, true);
offset += 4;
if (metaDataLen === 0) {
return {};
}
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}
);
const result = JSON.parse(plainText.toString(CryptoJS.enc.Utf8).slice(6));
result.albumPic = result.albumPic.replace("http:", "https:");
return result;
})();
offset += dataView.getUint32(offset + 5, true) + 13;
let audioData = new Uint8Array(fileBuffer, offset);
let audioDataLen = audioData.length;
for (let cur = 0; cur < audioDataLen; ++cur) {
audioData[cur] ^= keyBox[cur & 0xff];
}
if (musicMeta.format === undefined) {
const [f, L, a, C] = audioData;
if (f === 0x66 && L === 0x4c && a === 0x61 && C === 0x43) {
musicMeta.format = "flac";
} else {
musicMeta.format = "mp3";
}
}
const mime = audio_mime_type[musicMeta.format];
const artists = [];
musicMeta.artist.forEach(arr => {
artists.push(arr[0]);
});
if (musicMeta.format === "mp3") {
const writer = new ID3Writer(audioData);
writer.setFrame("TPE1", artists)
.setFrame("TIT2", musicMeta.musicName)
.setFrame("TALB", musicMeta.album);
if (musicMeta.albumPic !== "") {
try {
const img = await (await fetch(musicMeta.albumPic)).arrayBuffer();
writer.setFrame('APIC', {
type: 3,
data: img,
description: 'Cover'
})
} catch (e) {
console.log("Fail to write cover image!");
}
}
writer.addTag();
audioData = writer.arrayBuffer;
}
const musicData = new Blob([audioData], {
type: mime
});
const musicUrl = URL.createObjectURL(musicData);
const filename = artists.join(" & ") + " - " + musicMeta.musicName + "." + musicMeta.format;
return {
status: true,
filename: filename,
title: musicMeta.musicName,
artist: artists.join(" & "),
album: musicMeta.album,
picture: musicMeta.albumPic,
file: musicUrl,
mime: mime
};
}

124
src/plugins/qmc.js
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@@ -1,124 +0,0 @@
const musicMetadata = require("music-metadata-browser");
export {Decrypt}
const SEED_MAP = [
[0x4a, 0xd6, 0xca, 0x90, 0x67, 0xf7, 0x52],
[0x5e, 0x95, 0x23, 0x9f, 0x13, 0x11, 0x7e],
[0x47, 0x74, 0x3d, 0x90, 0xaa, 0x3f, 0x51],
[0xc6, 0x09, 0xd5, 0x9f, 0xfa, 0x66, 0xf9],
[0xf3, 0xd6, 0xa1, 0x90, 0xa0, 0xf7, 0xf0],
[0x1d, 0x95, 0xde, 0x9f, 0x84, 0x11, 0xf4],
[0x0e, 0x74, 0xbb, 0x90, 0xbc, 0x3f, 0x92],
[0x00, 0x09, 0x5b, 0x9f, 0x62, 0x66, 0xa1]];
const audio_mime_type = {
mp3: "audio/mpeg",
flac: "audio/flac",
ogg: "audio/ogg"
};
async function Decrypt(file) {
// 获取扩展名
let filename_ext = file.name.substring(file.name.lastIndexOf(".") + 1, file.name.length).toLowerCase();
let new_ext;
switch (filename_ext) {
case "qmc0":
case "qmc3":
new_ext = "mp3";
break;
case "qmcogg":
new_ext = "ogg";
break;
case "qmcflac":
new_ext = "flac";
break;
default:
return {
status: false,
message: "File type is incorrect!",
};
}
const mime = audio_mime_type[new_ext];
// 读取文件
const fileBuffer = await new Promise(resolve => {
const reader = new FileReader();
reader.onload = (e) => {
resolve(e.target.result);
};
reader.readAsArrayBuffer(file);
});
const audioData = new Uint8Array(fileBuffer);
const audioDataLen = audioData.length;
// 转换数据
const seed = new Mask();
for (let cur = 0; cur < audioDataLen; ++cur) {
audioData[cur] ^= seed.NextMask();
}
// 导出
const musicData = new Blob([audioData], {
type: mime
});
const musicUrl = URL.createObjectURL(musicData);
// 读取Meta
let tag = await musicMetadata.parseBlob(musicData);
// 处理无标题歌手
let filename_array = file.name.substring(0, file.name.lastIndexOf(".")).split("-");
let title = tag.common.title;
let artist = tag.common.artist;
if (filename_array.length > 1) {
if (artist === undefined) artist = filename_array[0].trim();
if (title === undefined) title = filename_array[1].trim();
} else if (filename_array.length === 1) {
if (title === undefined) title = filename_array[0].trim();
}
const filename = artist + " - " + title + "." + new_ext;
// 处理无封面
let pic_url = "";
if (tag.common.picture !== undefined && tag.common.picture.length >= 1) {
const picture = tag.common.picture[0];
const blobPic = new Blob([picture.data], {type: picture.format});
pic_url = URL.createObjectURL(blobPic);
}
// 返回
return {
status:true,
filename: filename,
title: title,
artist: artist,
album: tag.common.album,
picture: pic_url,
file: musicUrl,
mime: mime
}
}
class Mask {
constructor() {
this.x = -1;
this.y = 8;
this.dx = 1;
this.index = -1;
}
NextMask() {
let ret;
this.index++;
if (this.x < 0) {
this.dx = 1;
this.y = (8 - this.y) % 8;
ret = 0xc3
} else if (this.x > 6) {
this.dx = -1;
this.y = 7 - this.y;
ret = 0xd8
} else {
ret = SEED_MAP[this.y][this.x]
}
this.x += this.dx;
if (this.index === 0x8000 || (this.index > 0x8000 && (this.index + 1) % 0x8000 === 0)) {
return this.NextMask()
}
return ret
}
}

44
src/plugins/raw.js
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@@ -1,44 +0,0 @@
const musicMetadata = require("music-metadata-browser");
export {Decrypt}
const audio_mime_type = {
mp3: "audio/mpeg",
flac: "audio/flac"
};
async function Decrypt(file) {
let tag = await musicMetadata.parseBlob(file);
let pic_url = "";
if (tag.common.picture !== undefined && tag.common.picture.length > 0) {
let pic = new Blob([tag.common.picture[0].data], {type: tag.common.picture[0].format});
pic_url = URL.createObjectURL(pic);
}
let file_url = URL.createObjectURL(file);
let filename_no_ext = file.name.substring(0, file.name.lastIndexOf("."));
let filename_array = filename_no_ext.split("-");
let filename_ext = file.name.substring(file.name.lastIndexOf(".") + 1, file.name.length).toLowerCase();
const mime = audio_mime_type[filename_ext];
let title = tag.common.title;
let artist = tag.common.artist;
if (filename_array.length > 1) {
if (artist === undefined) artist = filename_array[0].trim();
if (title === undefined) title = filename_array[1].trim();
} else if (filename_array.length === 1) {
if (title === undefined) title = filename_array[0].trim();
}
const filename = artist + " - " + title + "." + filename_ext;
return {
status:true,
filename: filename,
title: title,
artist: artist,
album: tag.common.album,
picture: pic_url,
file: file_url,
mime: mime
}
}