refactor: restore support for QMCv1.
(cherry picked from commit 19239f182d71e2e4362309f08706a91c00bb6bd1)
This commit is contained in:
parent
dbb5472f96
commit
733c1721ed
@ -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,
|
||||
@ -9,7 +9,7 @@ import {
|
||||
SniffAudioExt, WriteMetaToFlac, WriteMetaToMp3
|
||||
} from "@/decrypt/utils";
|
||||
import {parseBlob as metaParseBlob} from "music-metadata-browser";
|
||||
import {decryptMGG} from "./qmcv2";
|
||||
import {DecryptQMCv2} from "./qmcv2";
|
||||
|
||||
|
||||
import iconv from "iconv-lite";
|
||||
@ -18,60 +18,49 @@ 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},
|
||||
|
||||
"qmc0": {ext: "mp3", version: 1},
|
||||
"qmc2": {ext: "ogg", version: 1},
|
||||
"qmc3": {ext: "mp3", version: 1},
|
||||
"qmcogg": {ext: "ogg", version: 1},
|
||||
"qmcflac": {ext: "flac", 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}
|
||||
};
|
||||
|
||||
function mergeUint8(array: Uint8Array[]): Uint8Array {
|
||||
// Get the total length of all arrays.
|
||||
let length = 0;
|
||||
array.forEach(item => {
|
||||
length += item.length;
|
||||
});
|
||||
|
||||
// Create a new array with total length and merge all source arrays.
|
||||
let mergedArray = new Uint8Array(length);
|
||||
let offset = 0;
|
||||
array.forEach(item => {
|
||||
mergedArray.set(item, offset);
|
||||
offset += item.length;
|
||||
});
|
||||
|
||||
return mergedArray;
|
||||
}
|
||||
|
||||
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];
|
||||
|
||||
const decodedParts = await decryptMGG(await file.arrayBuffer());
|
||||
let musicDecoded = mergeUint8(decodedParts);
|
||||
const fileBuffer = await GetArrayBuffer(file);
|
||||
let musicDecoded: Uint8Array;
|
||||
if (handler.version === 1) {
|
||||
const seed = QmcMaskGetDefault();
|
||||
musicDecoded = seed.Decrypt(new Uint8Array(fileBuffer));
|
||||
} else if (handler.version === 2) {
|
||||
musicDecoded = await DecryptQMCv2(fileBuffer);
|
||||
} else {
|
||||
throw new Error(`不支持的加密版本: ${handler.version} (${raw_ext})`);
|
||||
}
|
||||
|
||||
const ext = SniffAudioExt(musicDecoded, handler.ext);
|
||||
const mime = AudioMimeType[ext];
|
||||
|
||||
let musicBlob = new Blob(decodedParts, {type: mime});
|
||||
let musicBlob = new Blob([musicDecoded], {type: mime});
|
||||
|
||||
const musicMeta = await metaParseBlob(musicBlob);
|
||||
for (let metaIdx in musicMeta.native) {
|
||||
|
||||
@ -1,21 +1,36 @@
|
||||
import QMCCryptoModule from '@jixun/qmc2-crypto/QMC2-wasm-bundle';
|
||||
|
||||
// EOF Magic detection.
|
||||
// 检测文件末端使用的缓冲区大小
|
||||
const DETECTION_SIZE = 40;
|
||||
|
||||
// Process in 2m buffer size
|
||||
// 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;
|
||||
}
|
||||
|
||||
/**
|
||||
* 解密一个 QMC2 加密的文件。
|
||||
*
|
||||
* 如果检测并解密成功，返回解密后的 Uint8Array 数组，按顺序拼接即可得到完整文件。
|
||||
* 若失败，返回 `null`。
|
||||
* 如果检测并解密成功，返回解密后的 Uint8Array 数据。
|
||||
* @param {ArrayBuffer} mggBlob 读入的文件 Blob
|
||||
* @param {string} name 文件名
|
||||
* @return {Promise<Uint8Array[]|null>}
|
||||
* @return {Promise<Uint8Array|null>}
|
||||
*/
|
||||
export async function decryptMGG(mggBlob: ArrayBuffer) {
|
||||
export async function DecryptQMCv2(mggBlob: ArrayBuffer) {
|
||||
// 初始化模组
|
||||
const QMCCrypto = await QMCCryptoModule();
|
||||
|
||||
@ -44,52 +59,46 @@ export async function decryptMGG(mggBlob: ArrayBuffer) {
|
||||
QMCCrypto._free(pDetectionBuf);
|
||||
QMCCrypto._free(pDetectionResult);
|
||||
|
||||
if (detectOK) {
|
||||
// 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;
|
||||
// $prog.max = decryptedSize;
|
||||
|
||||
// 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;
|
||||
// $prog.value = offset;
|
||||
|
||||
// 避免网页卡死，让 event loop 处理一下其它事件。
|
||||
// Worker 应该不需要等待也可以？
|
||||
// await new Promise((resolve) => setTimeout(resolve));
|
||||
}
|
||||
QMCCrypto._free(buf);
|
||||
hCrypto.delete();
|
||||
|
||||
return decryptedParts;
|
||||
} else {
|
||||
throw new Error("ERROR: could not decrypt\n " + detectionError);
|
||||
if (!detectOK) {
|
||||
throw new Error("解密失败: \n " + detectionError);
|
||||
}
|
||||
|
||||
// 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);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user