refactor: simplify kgm decipher
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@ -1,5 +1,5 @@
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import { DecipherInstance, DecipherOK, DecipherResult, Status } from '~/decrypt-worker/Deciphers';
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import { DecipherInstance, DecipherOK, DecipherResult, Status } from '~/decrypt-worker/Deciphers';
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import { KuGouDecipher, KuGouHeader } from '@unlock-music/crypto';
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import { KuGou } from '@unlock-music/crypto';
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import type { DecryptCommandOptions } from '~/decrypt-worker/types.ts';
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import type { DecryptCommandOptions } from '~/decrypt-worker/types.ts';
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import { chunkBuffer } from '~/decrypt-worker/util/buffer.ts';
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import { chunkBuffer } from '~/decrypt-worker/util/buffer.ts';
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@ -7,12 +7,10 @@ export class KugouMusicDecipher implements DecipherInstance {
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cipherName = 'Kugou';
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cipherName = 'Kugou';
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async decrypt(buffer: Uint8Array, _options: DecryptCommandOptions): Promise<DecipherResult | DecipherOK> {
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async decrypt(buffer: Uint8Array, _options: DecryptCommandOptions): Promise<DecipherResult | DecipherOK> {
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let kgm: KuGouDecipher | undefined;
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let kgm: KuGou | undefined;
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let header: KuGouHeader | undefined;
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try {
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try {
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header = KuGouHeader.parse(buffer.subarray(0, 0x400));
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kgm = KuGou.from_header(buffer.subarray(0, 0x400));
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kgm = new KuGouDecipher(header);
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const audioBuffer = new Uint8Array(buffer.subarray(0x400));
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const audioBuffer = new Uint8Array(buffer.subarray(0x400));
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for (const [block, offset] of chunkBuffer(audioBuffer)) {
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for (const [block, offset] of chunkBuffer(audioBuffer)) {
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@ -26,7 +24,6 @@ export class KugouMusicDecipher implements DecipherInstance {
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};
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};
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} finally {
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} finally {
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kgm?.free();
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kgm?.free();
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header?.free();
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}
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}
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}
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}
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