Merge pull request #207 from jixunmoe/feature/qmcv2-wasm

WIP: 实验 qmc2-crypto 包
This commit is contained in:
MengYX 2021-12-16 06:35:06 +08:00 committed by GitHub
commit 2a23845714
7 changed files with 410 additions and 148 deletions

246
package-lock.json generated
View File

@ -7,9 +7,11 @@
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@ -33,6 +35,7 @@
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@ -10,6 +10,7 @@
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"test": "jest",
@ -18,6 +19,7 @@
},
"dependencies": {
"@babel/preset-typescript": "^7.16.5",
"@jixun/qmc2-crypto": "^0.0.5-R4",
"base64-js": "^1.5.1",
"browser-id3-writer": "^4.4.0",
"core-js": "^3.16.0",
@ -41,6 +43,7 @@
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@ -0,0 +1,11 @@
diff --git a/node_modules/threads/worker.mjs b/node_modules/threads/worker.mjs
index c53ac7d..619007b 100644
--- a/node_modules/threads/worker.mjs
+++ b/node_modules/threads/worker.mjs
@@ -1,4 +1,5 @@
-import WorkerContext from "./dist/worker/index.js"
+// Workaround: use of import seems to break minifier.
+const WorkerContext = require("./dist/worker/index.js")
export const expose = WorkerContext.expose
export const registerSerializer = WorkerContext.registerSerializer

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@ -38,8 +38,10 @@ export async function CommonDecrypt(file: FileInfo): Promise<DecryptResult> {
case "tkm"://QQ Music Accompaniment M4a
case "bkcmp3"://Moo Music Mp3
case "bkcflac"://Moo Music Flac
case "mflac"://QQ Music Desktop Flac
case "mgg": //QQ Music Desktop Ogg
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

View File

@ -1,4 +1,4 @@
import {QmcMask, QmcMaskDetectMflac, QmcMaskDetectMgg, QmcMaskGetDefault} from "./qmcMask";
import {QmcMask, QmcMaskGetDefault} from "./qmcMask";
import {toByteArray as Base64Decode} from 'base64-js'
import {
AudioMimeType,
@ -9,6 +9,7 @@ import {
SniffAudioExt, WriteMetaToFlac, WriteMetaToMp3
} from "@/decrypt/utils";
import {parseBlob as metaParseBlob} from "music-metadata-browser";
import {DecryptQMCv2} from "./qmcv2";
import iconv from "iconv-lite";
@ -17,51 +18,57 @@ import {queryAlbumCover, queryKeyInfo, reportKeyUsage} from "@/utils/api";
interface Handler {
ext: string
detect: boolean
handler(data?: Uint8Array): QmcMask | undefined
version: number
}
export const HandlerMap: { [key: string]: Handler } = {
"mgg": {handler: QmcMaskDetectMgg, ext: "ogg", detect: true},
"mflac": {handler: QmcMaskDetectMflac, ext: "flac", detect: true},
"mgg.cache": {handler: QmcMaskDetectMgg, ext: "ogg", detect: false},
"mflac.cache": {handler: QmcMaskDetectMflac, ext: "flac", detect: false},
"qmc0": {handler: QmcMaskGetDefault, ext: "mp3", detect: false},
"qmc2": {handler: QmcMaskGetDefault, ext: "ogg", detect: false},
"qmc3": {handler: QmcMaskGetDefault, ext: "mp3", detect: false},
"qmcogg": {handler: QmcMaskGetDefault, ext: "ogg", detect: false},
"qmcflac": {handler: QmcMaskGetDefault, ext: "flac", detect: false},
"bkcmp3": {handler: QmcMaskGetDefault, ext: "mp3", detect: false},
"bkcflac": {handler: QmcMaskGetDefault, ext: "flac", detect: false},
"tkm": {handler: QmcMaskGetDefault, ext: "m4a", detect: false},
"666c6163": {handler: QmcMaskGetDefault, ext: "flac", detect: false},
"6d7033": {handler: QmcMaskGetDefault, ext: "mp3", detect: false},
"6f6767": {handler: QmcMaskGetDefault, ext: "ogg", detect: false},
"6d3461": {handler: QmcMaskGetDefault, ext: "m4a", detect: false},
"776176": {handler: QmcMaskGetDefault, ext: "wav", detect: false}
"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},
"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> {
if (!(raw_ext in HandlerMap)) throw `Qmc cannot handle type: ${raw_ext}`;
const handler = HandlerMap[raw_ext];
let { version } = handler;
const fileData = new Uint8Array(await GetArrayBuffer(file));
let audioData, seed, keyData;
if (handler.detect) {
const keyLen = new DataView(fileData.slice(fileData.length - 4).buffer).getUint32(0, true)
const keyPos = fileData.length - 4 - keyLen;
audioData = fileData.slice(0, keyPos);
seed = handler.handler(audioData);
keyData = fileData.slice(keyPos, keyPos + keyLen);
if (!seed) seed = await queryKey(keyData, raw_filename, raw_ext);
if (!seed) throw raw_ext + "格式仅提供实验性支持";
} else {
audioData = fileData;
seed = handler.handler(audioData) as QmcMask;
if (!seed) throw raw_ext + "格式仅提供实验性支持";
const fileBuffer = await GetArrayBuffer(file);
let musicDecoded: Uint8Array|undefined;
if (version === 2) {
const v2Decrypted = await DecryptQMCv2(fileBuffer);
// 如果 v2 检测失败,降级到 v1 再尝试一次
if (v2Decrypted) {
musicDecoded = v2Decrypted;
} else {
version = 1;
}
}
if (version === 1) {
const seed = QmcMaskGetDefault();
musicDecoded = seed.Decrypt(new Uint8Array(fileBuffer));
} else if (!musicDecoded) {
throw new Error(`解密失败: ${raw_ext}`);
}
let musicDecoded = seed.Decrypt(audioData);
const ext = SniffAudioExt(musicDecoded, handler.ext);
const mime = AudioMimeType[ext];
@ -80,8 +87,6 @@ export async function Decrypt(file: Blob, raw_filename: string, raw_ext: string)
}
const info = GetMetaFromFile(raw_filename, musicMeta.common.title, musicMeta.common.artist)
if (keyData) reportKeyUsage(keyData, seed.getMatrix128(),
raw_filename, raw_ext, info.title, info.artist, musicMeta.common.album).then().catch();
let imgUrl = GetCoverFromFile(musicMeta);
if (!imgUrl) {

View File

@ -1,31 +1,3 @@
import {BytesHasPrefix, FLAC_HEADER, OGG_HEADER} from "@/decrypt/utils";
const QMOggPublicHeader1 = [
0x4f, 0x67, 0x67, 0x53, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x01, 0x1e, 0x01, 0x76, 0x6f, 0x72,
0x62, 0x69, 0x73, 0x00, 0x00, 0x00, 0x00, 0x02, 0x44, 0xac, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0xee, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0xb8, 0x01, 0x4f, 0x67, 0x67, 0x53, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00,
0xff, 0xff, 0xff, 0xff];
const QMOggPublicHeader2 = [
0x03, 0x76, 0x6f, 0x72, 0x62, 0x69, 0x73, 0x2c, 0x00, 0x00, 0x00, 0x58, 0x69, 0x70, 0x68, 0x2e,
0x4f, 0x72, 0x67, 0x20, 0x6c, 0x69, 0x62, 0x56, 0x6f, 0x72, 0x62, 0x69, 0x73, 0x20, 0x49, 0x20,
0x32, 0x30, 0x31, 0x35, 0x30, 0x31, 0x30, 0x35, 0x20, 0x28, 0xe2, 0x9b, 0x84, 0xe2, 0x9b, 0x84,
0xe2, 0x9b, 0x84, 0xe2, 0x9b, 0x84, 0x29, 0xff, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x54,
0x49, 0x54, 0x4c, 0x45, 0x3d];
const QMOggPublicConf1 = [
9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 0, 0,
0, 0, 9, 9, 9, 9, 0, 0, 0, 0, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 6, 3, 3, 3, 3, 6, 6, 6, 6,
3, 3, 3, 3, 6, 6, 6, 6, 6, 9, 9, 9, 9, 9, 9, 9,
9, 9, 9, 9, 9, 9, 9, 9, 0, 0, 0, 0, 9, 9, 9, 9,
0, 0, 0, 0];
const QMOggPublicConf2 = [
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 0, 1, 3, 3, 0, 1, 3, 3, 3,
3, 3, 3, 3, 3];
const QMCDefaultMaskMatrix = [
0xde, 0x51, 0xfa, 0xc3, 0x4a, 0xd6, 0xca, 0x90,
0x7e, 0x67, 0x5e, 0xf7, 0xd5, 0x52, 0x84, 0xd8,
@ -34,7 +6,6 @@ const QMCDefaultMaskMatrix = [
0x1d, 0x3f, 0x5b, 0xf0, 0x13, 0x0e, 0x09, 0x3d,
0xf9, 0xbc, 0x00, 0x11];
const AllMapping: number[][] = [];
const Mask128to44: number[] = [];
@ -57,7 +28,6 @@ const Mask128to44: number[] = [];
})
})();
export class QmcMask {
private readonly Matrix128: number[];
@ -126,81 +96,3 @@ export class QmcMask {
export function QmcMaskGetDefault() {
return new QmcMask(QMCDefaultMaskMatrix)
}
export function QmcMaskDetectMflac(data: Uint8Array) {
let search_len = Math.min(0x8000, data.length)
for (let block_idx = 0; block_idx < search_len; block_idx += 128) {
try {
let mask = new QmcMask(data.slice(block_idx, block_idx + 128));
if (BytesHasPrefix(mask.Decrypt(data.slice(0, FLAC_HEADER.length)), FLAC_HEADER)) {
return mask
}
} catch (e) {
}
}
return
}
export function QmcMaskDetectMgg(data: Uint8Array) {
if (data.length < 0x100) return
let matrixConfidence: { [key: number]: { [key: number]: number } } = {};
for (let i = 0; i < 44; i++) matrixConfidence[i] = {};
const page2 = data[0x54] ^ data[0xC] ^ QMOggPublicHeader1[0xC];
const spHeader = QmcGenerateOggHeader(page2)
const spConf = QmcGenerateOggConf(page2)
for (let idx128 = 0; idx128 < spHeader.length; idx128++) {
if (spConf[idx128] === 0) continue;
let idx44 = Mask128to44[idx128 % 128];
let _m = data[idx128] ^ spHeader[idx128]
let confidence = spConf[idx128];
if (_m in matrixConfidence[idx44]) {
matrixConfidence[idx44][_m] += confidence
} else {
matrixConfidence[idx44][_m] = confidence
}
}
let matrix = [];
try {
for (let i = 0; i < 44; i++)
matrix[i] = calcMaskFromConfidence(matrixConfidence[i]);
} catch (e) {
return
}
const mask = new QmcMask(matrix);
if (BytesHasPrefix(mask.Decrypt(data.slice(0, OGG_HEADER.length)), OGG_HEADER)) {
return mask
}
return
}
function calcMaskFromConfidence(confidence: { [key: number]: number }) {
const count = Object.keys(confidence).length
if (count === 0) throw "can not match at least one key";
if (count > 1) console.warn("There are 2 potential value for the mask!")
let result = ""
let conf = 0
for (let idx in confidence) {
if (confidence[idx] > conf) {
result = idx;
conf = confidence[idx];
}
}
return Number(result)
}
function QmcGenerateOggHeader(page2: number) {
let spec = [page2, 0xFF]
for (let i = 2; i < page2; i++) spec.push(0xFF)
spec.push(0xFF)
return QMOggPublicHeader1.concat(spec, QMOggPublicHeader2)
}
function QmcGenerateOggConf(page2: number) {
let specConf = [6, 0]
for (let i = 2; i < page2; i++) specConf.push(4)
specConf.push(0)
return QMOggPublicConf1.concat(specConf, QMOggPublicConf2)
}

103
src/decrypt/qmcv2.ts Normal file
View File

@ -0,0 +1,103 @@
import QMCCryptoModule from '@jixun/qmc2-crypto/QMC2-wasm-bundle';
// 检测文件末端使用的缓冲区大小
const DETECTION_SIZE = 40;
// 每次处理 2M 的数据
const DECRYPTION_BUF_SIZE = 2 * 1024 * 1024;
function MergeUint8Array(array: Uint8Array[]): Uint8Array {
let length = 0;
array.forEach(item => {
length += item.length;
});
let mergedArray = new Uint8Array(length);
let offset = 0;
array.forEach(item => {
mergedArray.set(item, offset);
offset += item.length;
});
return mergedArray;
}
/**
* QMC2
*
* Uint8Array
* @param {ArrayBuffer} mggBlob Blob
* @param {string} name
* @return {Promise<Uint8Array|false>}
*/
export async function DecryptQMCv2(mggBlob: ArrayBuffer) {
// 初始化模组
const QMCCrypto = await QMCCryptoModule();
// 申请内存块,并文件末端数据到 WASM 的内存堆
const detectionBuf = new Uint8Array(mggBlob.slice(-DETECTION_SIZE));
const pDetectionBuf = QMCCrypto._malloc(detectionBuf.length);
QMCCrypto.writeArrayToMemory(detectionBuf, pDetectionBuf);
// 检测结果内存块
const pDetectionResult = QMCCrypto._malloc(QMCCrypto.sizeof_qmc_detection());
// 进行检测
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");
// 释放内存
QMCCrypto._free(pDetectionBuf);
QMCCrypto._free(pDetectionResult);
if (!detectOK) {
return false;
}
// 计算解密后文件的大小。
// 之前得到的 position 为相对当前检测数据起点的偏移。
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)
);
// 解码 UTF-8 数据到 string
const decoder = new TextDecoder();
const ekey_b64 = decoder.decode(ekey);
// 初始化加密与缓冲区
const hCrypto = QMCCrypto.createInstWidthEKey(ekey_b64);
const buf = QMCCrypto._malloc(DECRYPTION_BUF_SIZE);
const decryptedParts = [];
let offset = 0;
let bytesToDecrypt = decryptedSize;
while (bytesToDecrypt > 0) {
const blockSize = Math.min(bytesToDecrypt, DECRYPTION_BUF_SIZE);
// 解密一些片段
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));
offset += blockSize;
bytesToDecrypt -= blockSize;
}
QMCCrypto._free(buf);
hCrypto.delete();
return MergeUint8Array(decryptedParts);
}