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chore(QMCv2): fix code style

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(cherry picked from commit 87138718549bdec014752ba43dcd5997aaf29137)
This commit is contained in:
MengYX
2021-12-17 08:41:44 +08:00
parent 979168b68f
commit 632651b371
5 changed files with 88 additions and 84 deletions
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17
src/decrypt/qmc.ts
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@@ -1,4 +1,4 @@
import {QmcMapCipher, QmcRC4Cipher, QmcStaticCipher, StreamCipher} from "./qmc_cipher";
import {QmcMapCipher, QmcRC4Cipher, QmcStaticCipher, QmcStreamCipher} from "./qmc_cipher";
import {
AudioMimeType,
GetArrayBuffer,
@@ -16,7 +16,7 @@ import {DecryptQMCWasm} from "./qmc_wasm";
import iconv from "iconv-lite";
import {DecryptResult} from "@/decrypt/entity";
import {queryAlbumCover} from "@/utils/api";
import {QmcDecryptKey} from "@/decrypt/qmc_key";
import {QmcDeriveKey} from "@/decrypt/qmc_key";
interface Handler {
ext: string
@@ -141,7 +141,8 @@ export class QmcDecoder {
size: number
decoded: boolean = false
audioSize?: number
cipher?: StreamCipher
private static readonly BYTE_COMMA = ','.charCodeAt(0)
cipher?: QmcStreamCipher
constructor(file: Uint8Array) {
this.file = file
@@ -167,16 +168,16 @@ export class QmcDecoder {
}
private searchKey() {
const last4Byte = this.file.slice(this.size - 4);
const last4Byte = this.file.slice(-4);
const textEnc = new TextDecoder()
if (textEnc.decode(last4Byte) === 'QTag') {
const sizeBuf = this.file.slice(this.size - 8, this.size - 4)
const sizeBuf = this.file.slice(-8, -4)
const sizeView = new DataView(sizeBuf.buffer, sizeBuf.byteOffset)
const keySize = sizeView.getUint32(0, false)
this.audioSize = this.size - keySize - 8
const rawKey = this.file.subarray(this.audioSize, this.size - 8)
const keyEnd = rawKey.findIndex(v => v == ','.charCodeAt(0))
const keyDec = QmcDecryptKey(rawKey.subarray(0, keyEnd))
const keyEnd = rawKey.findIndex(v => v == QmcDecoder.BYTE_COMMA)
const keyDec = QmcDeriveKey(rawKey.subarray(0, keyEnd))
this.cipher = new QmcRC4Cipher(keyDec)
} else {
const sizeView = new DataView(last4Byte.buffer, last4Byte.byteOffset);
@@ -184,7 +185,7 @@ export class QmcDecoder {
if (keySize < 0x300) {
this.audioSize = this.size - keySize - 4
const rawKey = this.file.subarray(this.audioSize, this.size - 4)
const keyDec = QmcDecryptKey(rawKey)
const keyDec = QmcDeriveKey(rawKey)
this.cipher = new QmcMapCipher(keyDec)
} else {
this.audioSize = this.size