Fix .qmc Files Unlock Error

.drone.yml

@@ -10,7 +10,7 @@ steps:
   - name: installDependencies
     image: node:lts
     commands:
-      - npm ci --verbose --registry=https://registry.npm.taobao.org
+      - npm ci --registry=https://registry.npm.taobao.org
 
   - name: build
     image: node:lts

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "unlock-music",
-  "version": "1.5.0",
+  "version": "1.5.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {

package.json

@@ -1,7 +1,7 @@
 {
   "name": "unlock-music",
-  "version": "1.5.0",
-  "updateInfo": "支持酷我.kwm;支持虾米.xm",
+  "version": "1.5.1",
+  "updateInfo": "改善.mgg解锁算法",
   "license": "MIT",
   "description": "Unlock encrypted music file in browser.",
   "repository": {
@@ -15,6 +15,7 @@
     "fix-compatibility": "node ./src/fix-compatibility.js"
   },
   "dependencies": {
+    "base64-js": "^1.3.1",
     "browser-id3-writer": "^4.4.0",
     "core-js": "^3.6.4",
     "crypto-js": "^4.0.0",

public/index.html

@@ -10,7 +10,7 @@
     <!--@formatter:on-->
     <script async src="https://stats.ixarea.com/ixarea-stats.js"></script>
     <title>音乐解锁 - By IXarea</title>
-    <meta content="音乐,解锁,ncm,qmc,qmc0,qmc3,qmcflac,qmcogg,mflac,qq音乐,网易云音乐,加密" name="keywords"/>
+    <meta content="音乐,解锁,ncm,qmc,mgg,mflac,qq音乐,网易云音乐,加密" name="keywords"/>
     <meta content="音乐解锁 - 在任何设备上解锁已购的加密音乐！" name="description"/>
     <!--@formatter:off-->
     <style>#loader{position:absolute;left:50%;top:50%;z-index:1010;margin:-75px 0 0 -75px;border:16px solid #f3f3f3;border-radius:50%;border-top:16px solid #3498db;width:120px;height:120px;animation:spin 2s linear infinite}@keyframes spin{0%{transform:rotate(0deg)}100%{transform:rotate(360deg)}}#loader-mask{position:absolute;width:100%;height:100%;bottom:0;left:0;right:0;top:0;z-index:1009;background-color:rgba(242,246,252,0.88)}</style>

src/decrypt/qmc.js

@@ -1,7 +1,8 @@
 import {AudioMimeType, DetectAudioExt, GetArrayBuffer, GetFileInfo, GetMetaCoverURL, RequestJsonp} from "./util";
 import {QmcMaskCreate58, QmcMaskDetectMflac, QmcMaskDetectMgg, QmcMaskGetDefault} from "./qmcMask";
 
-import {decode} from "iconv-lite"
+
+import {fromByteArray as Base64Encode, toByteArray as Base64Decode} from 'base64-js'
 
 const musicMetadata = require("music-metadata-browser");
 
@@ -25,11 +26,13 @@ export async function Decrypt(file, raw_filename, raw_ext) {
     const fileData = new Uint8Array(await GetArrayBuffer(file));
     let audioData, seed, keyData;
     if (handler.detect) {
-        audioData = fileData.slice(0, -0x170);
+        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(-0x170);
+        keyData = fileData.slice(keyPos, keyPos + keyLen);
         if (seed === undefined) seed = await queryKeyInfo(keyData, raw_filename, raw_ext);
-        if (seed === undefined) return {status: false, message: raw_ext + "格式仅提供实验性支持！"};
+        if (seed === undefined) return {status: false, message: raw_ext + "格式仅提供实验性支持"};
     } else {
         audioData = fileData;
         seed = handler.handler(audioData);
@@ -76,7 +79,7 @@ function reportKeyUsage(keyData, maskData, artist, title, album, filename, forma
         method: "POST",
         headers: {"Content-Type": "application/json"},
         body: JSON.stringify({
-            Mask: Array.from(maskData), Key: Array.from(keyData),
+            Mask: Base64Encode(new Uint8Array(maskData)), Key: Base64Encode(keyData),
             Artist: artist, Title: title, Album: album, Filename: filename, Format: format
         }),
     }).then().catch()
@@ -87,11 +90,12 @@ async function queryKeyInfo(keyData, filename, format) {
         const resp = await fetch("https://stats.ixarea.com/collect/qmcmask/query", {
             method: "POST",
             headers: {"Content-Type": "application/json"},
-            body: JSON.stringify({Format: format, Key: Array.from(keyData), Filename: filename}),
+            body: JSON.stringify({Format: format, Key: Base64Encode(keyData), Filename: filename, Type: 44}),
         });
         let data = await resp.json();
-        return QmcMaskCreate58(data.Matrix58, data.Super58A, data.Super58B);
+        return QmcMaskCreate58(Base64Decode(data.Matrix44));
     } catch (e) {
+        console.log(e);
     }
 }
 

src/decrypt/qmcMask.js

@@ -1,50 +1,57 @@
 import {FLAC_HEADER, IsBytesEqual, OGG_HEADER} from "./util"
 
-const QMOggConstHeader = [
-    0x4F, 0x67, 0x67, 0x53, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 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, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
-    0xFF, 0xFF, 0xFF, 0xFF, 0x00, 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, 0x00, 0x00, 0x00, 0x00,
-    0x00, 0x00, 0x00, 0x00, 0x54, 0x49, 0x54, 0x4C, 0x45, 0x3D];
-const QMOggConstHeaderConfidence = [
+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, 6, 0, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
-    3, 3, 3, 3, 0, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
-    9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
-    9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9,
-    9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 0, 1, 9, 9,
-    0, 1, 9, 9, 9, 9, 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 = [
-    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 QMCDefaultMaskSuperA = 0xC3;
-const QMCDefaultMaskSuperB = 0xD8;
+    0xde, 0x51, 0xfa, 0xc3, 0x4a, 0xd6, 0xca, 0x90,
+    0x7e, 0x67, 0x5e, 0xf7, 0xd5, 0x52, 0x84, 0xd8,
+    0x47, 0x95, 0xbb, 0xa1, 0xaa, 0xc6, 0x66, 0x23,
+    0x92, 0x62, 0xf3, 0x74, 0xa1, 0x9f, 0xf4, 0xa0,
+    0x1d, 0x3f, 0x5b, 0xf0, 0x13, 0x0e, 0x09, 0x3d,
+    0xf9, 0xbc, 0x00, 0x11];
+
 
 class QmcMask {
     constructor(matrix, superA, superB) {
         if (superA === undefined || superB === undefined) {
-            this.Matrix128 = matrix;
+            if (matrix.length === 44) {
+                this.Matrix44 = matrix
+                this.generateMask128from44()
+            } else {
+                this.Matrix128 = matrix
+                this.generateMask44from128()
+            }
             this.generateMask58from128()
         } else {
             this.Matrix58 = matrix;
             this.Super58A = superA;
             this.Super58B = superB;
             this.generateMask128from58();
+            this.generateMask44from128()
         }
     }
 
@@ -88,6 +95,35 @@ class QmcMask {
         this.Super58B = superB;
     }
 
+    generateMask44from128() {
+        if (this.Matrix128.length !== 128) throw "incorrect mask128 matrix length";
+        let mapping = GetConvertMapping()
+        this.Matrix44 = []
+        let idxI44 = 0
+        mapping.forEach(it256 => {
+            let it256Len = it256.length
+            for (let i = 1; i < it256Len; i++) {
+                if (this.Matrix128[it256[0]] !== this.Matrix128[it256[i]]) {
+                    throw "decode mask-128 to mask-44 failed"
+                }
+            }
+            this.Matrix44[idxI44] = this.Matrix128[it256[0]]
+            idxI44++
+        })
+    }
+
+    generateMask128from44() {
+        if (this.Matrix44.length !== 44) throw "incorrect mask length"
+        this.Matrix128 = []
+        let idx44 = 0
+        GetConvertMapping().forEach(it256 => {
+            it256.forEach(m => {
+                this.Matrix128[m] = this.Matrix44[idx44]
+            })
+            idx44++
+        })
+    }
+
     Decrypt(data) {
         let dst = data.slice(0);
         let index = -1;
@@ -107,7 +143,7 @@ class QmcMask {
 }
 
 export function QmcMaskGetDefault() {
-    return new QmcMask(QMCDefaultMaskMatrix, QMCDefaultMaskSuperA, QMCDefaultMaskSuperB)
+    return new QmcMask(QMCDefaultMaskMatrix)
 }
 
 export function QmcMaskDetectMflac(data) {
@@ -123,31 +159,38 @@ export function QmcMaskDetectMflac(data) {
 }
 
 export function QmcMaskDetectMgg(data) {
-    if (data.length < QMOggConstHeader.length) return;
+    if (data.length < 0x100) return
     let matrixConfidence = {};
-    for (let i = 0; i < 58; i++) matrixConfidence[i] = {};
+    for (let i = 0; i < 44; i++) matrixConfidence[i] = {};
 
-    for (let idx128 = 0; idx128 < QMOggConstHeader.length; idx128++) {
-        if (QMOggConstHeaderConfidence[idx128] === 0) continue;
-        let idx58 = GetMask58Index(idx128);
-        let mask = data[idx128] ^ QMOggConstHeader[idx128];
-        let confidence = QMOggConstHeaderConfidence[idx128];
-        if (mask in matrixConfidence[idx58]) {
-            matrixConfidence[idx58][mask] += confidence
+    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 = GetMask44Index(idx128);
+        let _m = data[idx128] ^ spHeader[idx128]
+        let confidence = spConf[idx128];
+        if (_m in matrixConfidence[idx44]) {
+            matrixConfidence[idx44][_m] += confidence
         } else {
-            matrixConfidence[idx58][mask] = confidence
+            matrixConfidence[idx44][_m] = confidence
         }
     }
-    let matrix = [], superA, superB;
+    let matrix = [];
     try {
-        for (let i = 0; i < 56; i++) matrix[i] = getMaskConfidenceResult(matrixConfidence[i]);
-        superA = getMaskConfidenceResult(matrixConfidence[56]);
-        superB = getMaskConfidenceResult(matrixConfidence[57]);
+        for (let i = 0; i < 44; i++)
+            matrix[i] = getMaskConfidenceResult(matrixConfidence[i]);
     } catch (e) {
         return;
     }
-    const mask = new QmcMask(matrix, superA, superB);
-    if (!IsBytesEqual(OGG_HEADER, mask.Decrypt(data.slice(0, OGG_HEADER.length)))) return;
+    const mask = new QmcMask(matrix);
+    let dx = mask.Decrypt(data.slice(0, OGG_HEADER.length));
+    if (!IsBytesEqual(OGG_HEADER, dx)) {
+        return;
+    }
+
     return mask;
 }
 
@@ -159,12 +202,17 @@ export function QmcMaskCreate58(matrix, superA, superB) {
     return new QmcMask(matrix, superA, superB)
 }
 
+export function QmcMaskCreate44(mask44) {
+    return new QmcMask(mask44)
+}
+
 /**
  * @param confidence {{}}
  * @returns {number}
  */
 function getMaskConfidenceResult(confidence) {
     if (confidence.length === 0) throw "can not match at least one key";
+    if (confidence.length > 1) console.warn("There are 2 potential value for the mask!")
     let result, conf = 0;
     for (let idx in confidence) {
         if (confidence[idx] > conf) {
@@ -178,27 +226,48 @@ function getMaskConfidenceResult(confidence) {
 /**
  * @return {number}
  */
-function GetMask58Index(idx128) {
-    if (idx128 > 127) idx128 = idx128 % 128;
-    let col = idx128 % 16;
-    let row = (idx128 - col) / 16;
-    switch (col) {
-        case 0://Super 1
-            row = 8;
-            col = 0;
-            break;
-        case 8://Super 2
-            row = 8;
-            col = 1;
-            break;
-        default:
-            if (col > 7) {
-                row = 7 - row;
-                col = 15 - col;
-            } else {
-                col -= 1;
-            }
-            break;
+
+
+const allMapping = [];
+const mask128to44 = [];
+
+(function () {
+    for (let i = 0; i < 128; i++) {
+        let realIdx = (i * i + 27) % 256
+        if (realIdx in allMapping) {
+            allMapping[realIdx].push(i)
+        } else {
+            allMapping[realIdx] = [i]
+        }
     }
-    return row * 7 + col
+
+    let idx44 = 0
+    allMapping.forEach(all128 => {
+        all128.forEach(_i128 => {
+            mask128to44[_i128] = idx44
+        })
+        idx44++
+    })
+})();
+
+function GetConvertMapping() {
+    return allMapping;
 }
+
+function GetMask44Index(idx128) {
+    return mask128to44[idx128 % 128]
+}
+
+function QmcGenerateOggHeader(page2) {
+    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) {
+    let specConf = [6, 0]
+    for (let i = 2; i < page2; i++) specConf.push(4)
+    specConf.push(0)
+    return QMOggPublicConf1.concat(specConf, QMOggPublicConf2)
+}