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Add Header Check For .mgg

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MengYX 2020-03-18 23:03:39 +08:00
parent 1d3725f9a4
commit ff63c420eb
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GPG Key ID: E63F9C7303E8F604
1 changed files with 8 additions and 6 deletions
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14
src/decrypt/qmcMask.js
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@ -1,4 +1,4 @@
import {FLAC_HEADER, IsBytesEqual} from "./util" import {FLAC_HEADER, IsBytesEqual, OGG_HEADER} from "./util"
const QMOggConstHeader = [ const QMOggConstHeader = [
0x4F, 0x67, 0x67, 0x53, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x4F, 0x67, 0x67, 0x53, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
@ -119,18 +119,18 @@ export function QmcMaskDetectMflac(data) {
} catch (e) { } catch (e) {
} }
} }
return mask return mask;
} }
export function QmcMaskDetectMgg(input) { export function QmcMaskDetectMgg(data) {
if (input.length < QMOggConstHeader.length) return; if (data.length < QMOggConstHeader.length) return;
let matrixConfidence = {}; let matrixConfidence = {};
for (let i = 0; i < 58; i++) matrixConfidence[i] = {}; for (let i = 0; i < 58; i++) matrixConfidence[i] = {};
for (let idx128 = 0; idx128 < QMOggConstHeader.length; idx128++) { for (let idx128 = 0; idx128 < QMOggConstHeader.length; idx128++) {
if (QMOggConstHeaderConfidence[idx128] === 0) continue; if (QMOggConstHeaderConfidence[idx128] === 0) continue;
let idx58 = GetMask58Index(idx128); let idx58 = GetMask58Index(idx128);
let mask = input[idx128] ^ QMOggConstHeader[idx128]; let mask = data[idx128] ^ QMOggConstHeader[idx128];
let confidence = QMOggConstHeaderConfidence[idx128]; let confidence = QMOggConstHeaderConfidence[idx128];
if (mask in matrixConfidence[idx58]) { if (mask in matrixConfidence[idx58]) {
matrixConfidence[idx58][mask] += confidence matrixConfidence[idx58][mask] += confidence
@ -146,7 +146,9 @@ export function QmcMaskDetectMgg(input) {
} catch (e) { } catch (e) {
return; return;
} }
return new QmcMask(matrix, superA, superB); const mask = new QmcMask(matrix, superA, superB);
if (!IsBytesEqual(OGG_HEADER, mask.Decrypt(data.slice(0, OGG_HEADER.length)))) return;
return mask;
} }
export function QmcMaskCreate128(mask128) { export function QmcMaskCreate128(mask128) {