207 lines
6.8 KiB
TypeScript
207 lines
6.8 KiB
TypeScript
import {BytesHasPrefix, FLAC_HEADER, OGG_HEADER} from "@/decrypt/utils";
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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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const AllMapping: number[][] = [];
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const Mask128to44: number[] = [];
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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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export class QmcMask {
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private readonly Matrix128: number[];
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constructor(matrix: number[] | Uint8Array) {
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if (matrix instanceof Uint8Array) matrix = Array.from(matrix)
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if (matrix.length === 44) {
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this.Matrix128 = this._generate128(matrix)
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} else if (matrix.length === 128) {
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this.Matrix128 = matrix
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} else {
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throw Error("invalid mask length")
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}
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}
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getMatrix128() {
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return this.Matrix128
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}
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getMatrix44(): number[] {
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const matrix44: number[] = []
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let idxI44 = 0
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AllMapping.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]] !== this.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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matrix44[idxI44] = this.Matrix128[it256[0]]
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idxI44++
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})
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return matrix44
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}
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Decrypt(data: Uint8Array) {
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if (!this.Matrix128) throw Error("bad call sequence")
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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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private _generate128(matrix44: number[]): number[] {
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const matrix128: number[] = []
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let idx44 = 0
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AllMapping.forEach(it256 => {
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it256.forEach(m => {
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matrix128[m] = matrix44[idx44]
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})
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idx44++
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})
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return matrix128
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}
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}
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export function QmcMaskGetDefault() {
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return new QmcMask(QMCDefaultMaskMatrix)
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}
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export function QmcMaskDetectMflac(data: Uint8Array) {
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let search_len = Math.min(0x8000, data.length)
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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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let mask = new QmcMask(data.slice(block_idx, block_idx + 128));
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if (BytesHasPrefix(mask.Decrypt(data.slice(0, FLAC_HEADER.length)), FLAC_HEADER)) {
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return mask
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}
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} catch (e) {
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}
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}
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return
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}
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export function QmcMaskDetectMgg(data: Uint8Array) {
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if (data.length < 0x100) return
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let matrixConfidence: { [key: number]: { [key: number]: number } } = {};
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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 = Mask128to44[idx128 % 128];
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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] = calcMaskFromConfidence(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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if (BytesHasPrefix(mask.Decrypt(data.slice(0, OGG_HEADER.length)), OGG_HEADER)) {
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return mask
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}
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return
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}
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function calcMaskFromConfidence(confidence: { [key: number]: number }) {
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const count = Object.keys(confidence).length
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if (count === 0) throw "can not match at least one key";
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if (count > 1) console.warn("There are 2 potential value for the mask!")
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let result = ""
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let 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 Number(result)
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}
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function QmcGenerateOggHeader(page2: number) {
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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: number) {
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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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}
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