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@ -1,4 +1,4 @@ |
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import {BytesEquals, BytesHasPrefix, FLAC_HEADER, OGG_HEADER} from "@/decrypt/utils.ts"; |
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import {BytesHasPrefix, FLAC_HEADER, OGG_HEADER} from "@/decrypt/utils.ts"; |
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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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@ -35,96 +35,65 @@ const QMCDefaultMaskMatrix = [ |
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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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} 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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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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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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AllMapping[realIdx] = [i] |
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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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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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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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export class QmcMask { |
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private readonly Matrix128: number[]; |
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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 (BytesEquals(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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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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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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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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mapping.forEach(it256 => { |
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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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this.Matrix44[idxI44] = this.Matrix128[it256[0]] |
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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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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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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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@ -140,13 +109,25 @@ class QmcMask { |
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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) { |
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export function QmcMaskDetectMflac(data: Uint8Array) { |
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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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@ -160,9 +141,9 @@ export function QmcMaskDetectMflac(data) { |
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return mask; |
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} |
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export function QmcMaskDetectMgg(data) { |
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export function QmcMaskDetectMgg(data: Uint8Array) { |
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if (data.length < 0x100) return |
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let matrixConfidence = {}; |
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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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@ -171,7 +152,7 @@ export function QmcMaskDetectMgg(data) { |
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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 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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@ -183,7 +164,7 @@ export function QmcMaskDetectMgg(data) { |
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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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matrix[i] = calcMaskFromConfidence(matrixConfidence[i]); |
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} catch (e) { |
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return; |
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} |
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@ -191,82 +172,34 @@ export function QmcMaskDetectMgg(data) { |
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if (!BytesHasPrefix(mask.Decrypt(data.slice(0, OGG_HEADER.length)), OGG_HEADER)) { |
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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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function calcMaskFromConfidence(confidence: { [key: number]: number }) { |
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console.log(confidence) |
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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 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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return Number(result) |
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} |
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function QmcGenerateOggHeader(page2) { |
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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) { |
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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) |