275 lines
8.8 KiB
JavaScript
275 lines
8.8 KiB
JavaScript
import {FLAC_HEADER, IsBytesEqual, OGG_HEADER} from "./util"
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const QMOggPublicHeader1 = [
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0x4f, 0x67, 0x67, 0x53, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff,
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0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x01, 0x1e, 0x01, 0x76, 0x6f, 0x72,
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0x62, 0x69, 0x73, 0x00, 0x00, 0x00, 0x00, 0x02, 0x44, 0xac, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0xee, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0xb8, 0x01, 0x4f, 0x67, 0x67, 0x53, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0x01, 0x00, 0x00, 0x00,
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0xff, 0xff, 0xff, 0xff];
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const QMOggPublicHeader2 = [
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0x03, 0x76, 0x6f, 0x72, 0x62, 0x69, 0x73, 0x2c, 0x00, 0x00, 0x00, 0x58, 0x69, 0x70, 0x68, 0x2e,
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0x4f, 0x72, 0x67, 0x20, 0x6c, 0x69, 0x62, 0x56, 0x6f, 0x72, 0x62, 0x69, 0x73, 0x20, 0x49, 0x20,
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0x32, 0x30, 0x31, 0x35, 0x30, 0x31, 0x30, 0x35, 0x20, 0x28, 0xe2, 0x9b, 0x84, 0xe2, 0x9b, 0x84,
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0xe2, 0x9b, 0x84, 0xe2, 0x9b, 0x84, 0x29, 0xff, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x54,
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0x49, 0x54, 0x4c, 0x45, 0x3d];
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const QMOggPublicConf1 = [
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9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 0, 0,
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0, 0, 9, 9, 9, 9, 0, 0, 0, 0, 9, 9, 9, 9, 9, 9,
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9, 9, 9, 9, 9, 9, 9, 6, 3, 3, 3, 3, 6, 6, 6, 6,
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3, 3, 3, 3, 6, 6, 6, 6, 6, 9, 9, 9, 9, 9, 9, 9,
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9, 9, 9, 9, 9, 9, 9, 9, 0, 0, 0, 0, 9, 9, 9, 9,
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0, 0, 0, 0];
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const QMOggPublicConf2 = [
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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3, 3, 3, 3, 3, 3, 3, 0, 1, 3, 3, 0, 1, 3, 3, 3,
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3, 3, 3, 3, 3];
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const QMCDefaultMaskMatrix = [
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0xde, 0x51, 0xfa, 0xc3, 0x4a, 0xd6, 0xca, 0x90,
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0x7e, 0x67, 0x5e, 0xf7, 0xd5, 0x52, 0x84, 0xd8,
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0x47, 0x95, 0xbb, 0xa1, 0xaa, 0xc6, 0x66, 0x23,
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0x92, 0x62, 0xf3, 0x74, 0xa1, 0x9f, 0xf4, 0xa0,
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0x1d, 0x3f, 0x5b, 0xf0, 0x13, 0x0e, 0x09, 0x3d,
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0xf9, 0xbc, 0x00, 0x11];
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class QmcMask {
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constructor(matrix, superA, superB) {
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if (superA === undefined || superB === undefined) {
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if (matrix.length === 44) {
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this.Matrix44 = matrix
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this.generateMask128from44()
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debugger
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} else {
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this.Matrix128 = matrix
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this.generateMask44from128()
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}
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this.generateMask58from128()
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} else {
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this.Matrix58 = matrix;
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this.Super58A = superA;
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this.Super58B = superB;
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this.generateMask128from58();
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this.generateMask44from128()
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}
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}
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generateMask128from58() {
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if (this.Matrix58.length !== 56) throw "incorrect mask58 matrix length";
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let matrix128 = [];
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for (let rowIdx = 0; rowIdx < 8; rowIdx += 1) {
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matrix128 = matrix128.concat(
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[this.Super58A],
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this.Matrix58.slice(7 * rowIdx, 7 * rowIdx + 7),
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[this.Super58B],
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this.Matrix58.slice(56 - 7 - 7 * rowIdx, 56 - 7 * rowIdx).reverse()
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);
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}
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this.Matrix128 = matrix128;
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}
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generateMask58from128() {
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if (this.Matrix128.length !== 128) throw "incorrect mask128 length";
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const superA = this.Matrix128[0], superB = this.Matrix128[8];
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let matrix58 = [];
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for (let rowIdx = 0; rowIdx < 8; rowIdx += 1) {
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let lenStart = 16 * rowIdx;
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let lenRightStart = 120 - lenStart;
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if (this.Matrix128[lenStart] !== superA || this.Matrix128[lenStart + 8] !== superB) {
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throw "decode mask-128 to mask-58 failed"
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}
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let rowLeft = this.Matrix128.slice(lenStart + 1, lenStart + 8);
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let rowRight = this.Matrix128.slice(lenRightStart + 1, lenRightStart + 8).reverse();
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if (IsBytesEqual(rowLeft, rowRight)) {
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matrix58 = matrix58.concat(rowLeft);
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} else {
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throw "decode mask-128 to mask-58 failed"
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}
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}
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this.Matrix58 = matrix58;
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this.Super58A = superA;
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this.Super58B = superB;
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}
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generateMask44from128() {
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if (this.Matrix128.length !== 128) throw "incorrect mask128 matrix length";
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let mapping = GetConvertMapping()
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this.Matrix44 = []
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let idxI44 = 0
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mapping.forEach(it256 => {
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let it256Len = it256.length
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for (let i = 1; i < it256Len; i++) {
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if (this.Matrix128[it256[0]] !== q.Matrix128[it256[i]]) {
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throw "decode mask-128 to mask-44 failed"
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}
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}
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this.Matrix44[idxI44] = this.Matrix128[it256[0]]
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idxI44++
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})
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}
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generateMask128from44() {
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if (this.Matrix44.length !== 44) throw "incorrect mask length"
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this.Matrix128 = []
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let idx44 = 0
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GetConvertMapping().forEach(it256 => {
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it256.forEach(m => {
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this.Matrix128[m] = this.Matrix44[idx44]
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})
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idx44++
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})
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}
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Decrypt(data) {
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let dst = data.slice(0);
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let index = -1;
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let maskIdx = -1;
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for (let cur = 0; cur < data.length; cur++) {
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index++;
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maskIdx++;
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if (index === 0x8000 || (index > 0x8000 && (index + 1) % 0x8000 === 0)) {
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index++;
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maskIdx++;
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}
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if (maskIdx >= 128) maskIdx -= 128;
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dst[cur] ^= this.Matrix128[maskIdx];
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}
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return dst;
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}
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}
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export function QmcMaskGetDefault() {
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return new QmcMask(QMCDefaultMaskMatrix, QMCDefaultMaskSuperA, QMCDefaultMaskSuperB)
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}
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export function QmcMaskDetectMflac(data) {
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let search_len = Math.min(0x8000, data.length), mask;
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for (let block_idx = 0; block_idx < search_len; block_idx += 128) {
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try {
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mask = new QmcMask(data.slice(block_idx, block_idx + 128));
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if (IsBytesEqual(FLAC_HEADER, mask.Decrypt(data.slice(0, FLAC_HEADER.length)))) break;
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} catch (e) {
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}
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}
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return mask;
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}
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export function QmcMaskDetectMgg(data) {
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if (data.length < 0x100) return
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let matrixConfidence = {};
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for (let i = 0; i < 44; i++) matrixConfidence[i] = {};
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const page2 = data[0x54] ^ data[0xC] ^ QMOggPublicHeader1[0xC];
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const spHeader = QmcGenerateOggHeader(page2)
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const spConf = QmcGenerateOggConf(page2)
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for (let idx128 = 0; idx128 < spHeader.length; idx128++) {
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if (spConf[idx128] === 0) continue;
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let idx44 = GetMask44Index(idx128);
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let _m = data[idx128] ^ spHeader[idx128]
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let confidence = spConf[idx128];
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if (_m in matrixConfidence[idx44]) {
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matrixConfidence[idx44][_m] += confidence
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} else {
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matrixConfidence[idx44][_m] = confidence
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}
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}
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let matrix = [];
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try {
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for (let i = 0; i < 44; i++)
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matrix[i] = getMaskConfidenceResult(matrixConfidence[i]);
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} catch (e) {
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return;
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}
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const mask = new QmcMask(matrix);
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let dx = mask.Decrypt(data.slice(0, OGG_HEADER.length));
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if (!IsBytesEqual(OGG_HEADER, dx)) {
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debugger
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return;
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}
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return mask;
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}
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export function QmcMaskCreate128(mask128) {
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return new QmcMask(mask128)
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}
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export function QmcMaskCreate58(matrix, superA, superB) {
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return new QmcMask(matrix, superA, superB)
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}
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export function QmcMaskCreate44(mask44) {
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return new QmcMask(mask44)
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}
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/**
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* @param confidence {{}}
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* @returns {number}
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*/
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function getMaskConfidenceResult(confidence) {
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if (confidence.length === 0) throw "can not match at least one key";
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if (confidence.length > 1) console.warn("There are 2 potential value for the mask!")
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let result, conf = 0;
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for (let idx in confidence) {
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if (confidence[idx] > conf) {
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result = idx;
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conf = confidence[idx];
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}
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}
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return parseInt(result)
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}
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/**
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* @return {number}
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*/
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const allMapping = [];
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const mask128to44 = [];
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(function () {
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for (let i = 0; i < 128; i++) {
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let realIdx = (i * i + 27) % 256
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if (realIdx in allMapping) {
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allMapping[realIdx].push(i)
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} else {
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allMapping[realIdx] = [i]
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}
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}
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let idx44 = 0
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allMapping.forEach(all128 => {
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all128.forEach(_i128 => {
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mask128to44[_i128] = idx44
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})
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idx44++
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})
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})();
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function GetConvertMapping() {
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return allMapping;
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}
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function GetMask44Index(idx128) {
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return mask128to44[idx128 % 128]
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}
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function QmcGenerateOggHeader(page2) {
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let spec = [page2, 0xFF]
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for (let i = 2; i < page2; i++) spec.push(0xFF)
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spec.push(0xFF)
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return QMOggPublicHeader1.concat(spec, QMOggPublicHeader2)
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}
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function QmcGenerateOggConf(page2) {
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let specConf = [6, 0]
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for (let i = 2; i < page2; i++) specConf.push(4)
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specConf.push(0)
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return QMOggPublicConf1.concat(specConf, QMOggPublicConf2)
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} |