feat: kgm unlock without large / remote mask file

This commit is contained in:
鲁树人 2022-04-28 00:36:20 +01:00
parent c63718f7d1
commit 99a2c4aaa5
4 changed files with 38 additions and 89 deletions

32
package-lock.json generated
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@ -11,6 +11,7 @@
"license": "MIT",
"dependencies": {
"@babel/preset-typescript": "^7.16.5",
"@jixun/kugou-crypto": "^1.0.2",
"@jixun/qmc2-crypto": "^0.0.6-R1",
"@unlock-music/joox-crypto": "^0.0.1-R5",
"base64-js": "^1.5.1",
@ -2986,6 +2987,22 @@
"regenerator-runtime": "^0.13.3"
}
},
"node_modules/@jixun/kugou-crypto": {
"version": "1.0.2",
"resolved": "https://registry.npmjs.org/@jixun/kugou-crypto/-/kugou-crypto-1.0.2.tgz",
"integrity": "sha512-tD2XbiS0qXB4mnDeRsh0/qc4setuVlJT2AV/FpFpp9Ruk3sGYzi7iAKypxYK5OK7emLH7zxBXs85xTmmyWjueQ==",
"dependencies": {
"commander": "^9.2.0"
}
},
"node_modules/@jixun/kugou-crypto/node_modules/commander": {
"version": "9.2.0",
"resolved": "https://registry.npmjs.org/commander/-/commander-9.2.0.tgz",
"integrity": "sha512-e2i4wANQiSXgnrBlIatyHtP1odfUp0BbV5Y5nEGbxtIrStkEOAAzCUirvLBNXHLr7kwLvJl6V+4V3XV9x7Wd9w==",
"engines": {
"node": "^12.20.0 || >=14"
}
},
"node_modules/@jixun/qmc2-crypto": {
"version": "0.0.6-R1",
"resolved": "https://registry.npmjs.org/@jixun/qmc2-crypto/-/qmc2-crypto-0.0.6-R1.tgz",
@ -23188,6 +23205,21 @@
"regenerator-runtime": "^0.13.3"
}
},
"@jixun/kugou-crypto": {
"version": "1.0.2",
"resolved": "https://registry.npmjs.org/@jixun/kugou-crypto/-/kugou-crypto-1.0.2.tgz",
"integrity": "sha512-tD2XbiS0qXB4mnDeRsh0/qc4setuVlJT2AV/FpFpp9Ruk3sGYzi7iAKypxYK5OK7emLH7zxBXs85xTmmyWjueQ==",
"requires": {
"commander": "^9.2.0"
},
"dependencies": {
"commander": {
"version": "9.2.0",
"resolved": "https://registry.npmjs.org/commander/-/commander-9.2.0.tgz",
"integrity": "sha512-e2i4wANQiSXgnrBlIatyHtP1odfUp0BbV5Y5nEGbxtIrStkEOAAzCUirvLBNXHLr7kwLvJl6V+4V3XV9x7Wd9w=="
}
}
},
"@jixun/qmc2-crypto": {
"version": "0.0.6-R1",
"resolved": "https://registry.npmjs.org/@jixun/qmc2-crypto/-/qmc2-crypto-0.0.6-R1.tgz",

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@ -21,6 +21,7 @@
},
"dependencies": {
"@babel/preset-typescript": "^7.16.5",
"@jixun/kugou-crypto": "^1.0.2",
"@jixun/qmc2-crypto": "^0.0.6-R1",
"@unlock-music/joox-crypto": "^0.0.1-R5",
"base64-js": "^1.5.1",

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@ -8,7 +8,7 @@ import {
} from '@/decrypt/utils';
import { parseBlob as metaParseBlob } from 'music-metadata-browser';
import { DecryptResult } from '@/decrypt/entity';
import config from '@/../package.json';
import { decryptKgmByteAtOffsetV2, decryptVprByteAtOffset } from '@jixun/kugou-crypto/dist/utils/decryptionHelper';
//prettier-ignore
const VprHeader = [
@ -20,12 +20,6 @@ const KgmHeader = [
0x7C, 0xD5, 0x32, 0xEB, 0x86, 0x02, 0x7F, 0x4B,
0xA8, 0xAF, 0xA6, 0x8E, 0x0F, 0xFF, 0x99, 0x14
]
//prettier-ignore
const VprMaskDiff = [
0x25, 0xDF, 0xE8, 0xA6, 0x75, 0x1E, 0x75, 0x0E,
0x2F, 0x80, 0xF3, 0x2D, 0xB8, 0xB6, 0xE3, 0x11,
0x00
]
export async function Decrypt(file: File, raw_filename: string, raw_ext: string): Promise<DecryptResult> {
const oriData = new Uint8Array(await GetArrayBuffer(file));
@ -39,26 +33,13 @@ export async function Decrypt(file: File, raw_filename: string, raw_ext: string)
let audioData = oriData.slice(headerLen);
let dataLen = audioData.length;
if (audioData.byteLength > 1 << 26) {
throw Error("文件过大,请使用 <a target='_blank' href='https://github.com/unlock-music/cli'>CLI版本</a> 进行解锁");
}
let key1 = new Uint8Array(17);
key1.set(oriData.slice(0x1c, 0x2c), 0);
if (MaskV2.length === 0) {
if (!(await LoadMaskV2())) throw Error('加载Kgm/Vpr Mask数据失败');
}
let key1 = Array.from(oriData.slice(0x1c, 0x2c));
key1.push(0);
const decryptByte = raw_ext === 'vpr' ? decryptVprByteAtOffset : decryptKgmByteAtOffsetV2;
for (let i = 0; i < dataLen; i++) {
let med8 = key1[i % 17] ^ audioData[i];
med8 ^= (med8 & 0xf) << 4;
let msk8 = GetMask(i);
msk8 ^= (msk8 & 0xf) << 4;
audioData[i] = med8 ^ msk8;
}
if (raw_ext === 'vpr') {
for (let i = 0; i < dataLen; i++) audioData[i] ^= VprMaskDiff[i % 17];
audioData[i] = decryptByte(audioData[i], key1, i);
}
const ext = SniffAudioExt(audioData);
@ -77,68 +58,3 @@ export async function Decrypt(file: File, raw_filename: string, raw_ext: string)
artist,
};
}
function GetMask(pos: number) {
return MaskV2PreDef[pos % 272] ^ MaskV2[pos >> 4];
}
let MaskV2: Uint8Array = new Uint8Array(0);
async function LoadMaskV2(): Promise<boolean> {
let mask_url = `https://cdn.jsdelivr.net/gh/unlock-music/unlock-music@${config.version}/public/static/kgm.mask`;
if (['http:', 'https:'].some((v) => v == self.location.protocol)) {
if (!!self.document) {
// using Web Worker
mask_url = './static/kgm.mask';
} else {
// using Main thread
mask_url = '../static/kgm.mask';
}
}
try {
const resp = await fetch(mask_url, { method: 'GET' });
MaskV2 = new Uint8Array(await resp.arrayBuffer());
return true;
} catch (e) {
console.error(e);
return false;
}
}
//prettier-ignore
const MaskV2PreDef = [
0xb8, 0xd5, 0x3d, 0xb2, 0xe9, 0xaf, 0x78, 0x8c,
0x83, 0x33, 0x71, 0x51, 0x76, 0xa0, 0xcd, 0x37,
0x2f, 0x3e, 0x35, 0x8d, 0xa9, 0xbe, 0x98, 0xb7,
0xe7, 0x8c, 0x22, 0xce, 0x5a, 0x61, 0xdf, 0x68,
0x69, 0x89, 0xfe, 0xa5, 0xb6, 0xde, 0xa9, 0x77,
0xfc, 0xc8, 0xbd, 0xbd, 0xe5, 0x6d, 0x3e, 0x5a,
0x36, 0xef, 0x69, 0x4e, 0xbe, 0xe1, 0xe9, 0x66,
0x1c, 0xf3, 0xd9, 0x02, 0xb6, 0xf2, 0x12, 0x9b,
0x44, 0xd0, 0x6f, 0xb9, 0x35, 0x89, 0xb6, 0x46,
0x6d, 0x73, 0x82, 0x06, 0x69, 0xc1, 0xed, 0xd7,
0x85, 0xc2, 0x30, 0xdf, 0xa2, 0x62, 0xbe, 0x79,
0x2d, 0x62, 0x62, 0x3d, 0x0d, 0x7e, 0xbe, 0x48,
0x89, 0x23, 0x02, 0xa0, 0xe4, 0xd5, 0x75, 0x51,
0x32, 0x02, 0x53, 0xfd, 0x16, 0x3a, 0x21, 0x3b,
0x16, 0x0f, 0xc3, 0xb2, 0xbb, 0xb3, 0xe2, 0xba,
0x3a, 0x3d, 0x13, 0xec, 0xf6, 0x01, 0x45, 0x84,
0xa5, 0x70, 0x0f, 0x93, 0x49, 0x0c, 0x64, 0xcd,
0x31, 0xd5, 0xcc, 0x4c, 0x07, 0x01, 0x9e, 0x00,
0x1a, 0x23, 0x90, 0xbf, 0x88, 0x1e, 0x3b, 0xab,
0xa6, 0x3e, 0xc4, 0x73, 0x47, 0x10, 0x7e, 0x3b,
0x5e, 0xbc, 0xe3, 0x00, 0x84, 0xff, 0x09, 0xd4,
0xe0, 0x89, 0x0f, 0x5b, 0x58, 0x70, 0x4f, 0xfb,
0x65, 0xd8, 0x5c, 0x53, 0x1b, 0xd3, 0xc8, 0xc6,
0xbf, 0xef, 0x98, 0xb0, 0x50, 0x4f, 0x0f, 0xea,
0xe5, 0x83, 0x58, 0x8c, 0x28, 0x2c, 0x84, 0x67,
0xcd, 0xd0, 0x9e, 0x47, 0xdb, 0x27, 0x50, 0xca,
0xf4, 0x63, 0x63, 0xe8, 0x97, 0x7f, 0x1b, 0x4b,
0x0c, 0xc2, 0xc1, 0x21, 0x4c, 0xcc, 0x58, 0xf5,
0x94, 0x52, 0xa3, 0xf3, 0xd3, 0xe0, 0x68, 0xf4,
0x00, 0x23, 0xf3, 0x5e, 0x0a, 0x7b, 0x93, 0xdd,
0xab, 0x12, 0xb2, 0x13, 0xe8, 0x84, 0xd7, 0xa7,
0x9f, 0x0f, 0x32, 0x4c, 0x55, 0x1d, 0x04, 0x36,
0x52, 0xdc, 0x03, 0xf3, 0xf9, 0x4e, 0x42, 0xe9,
0x3d, 0x61, 0xef, 0x7c, 0xb6, 0xb3, 0x93, 0x50,
];