diff --git a/package-lock.json b/package-lock.json index 72e4aa1..7f54c3b 100644 --- a/package-lock.json +++ b/package-lock.json @@ -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", diff --git a/package.json b/package.json index 3aaeec3..f4e520e 100644 --- a/package.json +++ b/package.json @@ -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", diff --git a/src/decrypt/entity.ts b/src/decrypt/entity.ts index 55faead..a76b9f8 100644 --- a/src/decrypt/entity.ts +++ b/src/decrypt/entity.ts @@ -9,7 +9,7 @@ export interface DecryptResult { ext: string file: string - picture: string + picture?: string message?: string rawExt?: string diff --git a/src/decrypt/ncm.js b/src/decrypt/ncm.js deleted file mode 100644 index 70f373b..0000000 --- a/src/decrypt/ncm.js +++ /dev/null @@ -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}; -} - - diff --git a/src/decrypt/utils.ts b/src/decrypt/utils.ts index 194a836..c2db07d 100644 --- a/src/decrypt/utils.ts +++ b/src/decrypt/utils.ts @@ -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 diff --git a/src/shims-browser-id3-writer.d.ts b/src/shims-browser-id3-writer.d.ts index acd09de..48113af 100644 --- a/src/shims-browser-id3-writer.d.ts +++ b/src/shims-browser-id3-writer.d.ts @@ -4,7 +4,7 @@ declare module "browser-id3-writer" { setFrame(name: string, value: string | object | string[]) - addTag(): ArrayBuffer + addTag(): Uint8Array } }