test: added test cases for qmc cache.

This commit is contained in:
鲁树人 2022-11-21 18:14:44 +00:00
parent 97cd7afc44
commit c3b75c8fea
3 changed files with 74 additions and 50 deletions

View File

@ -0,0 +1,20 @@
import { DecryptBuffer as DecryptQmcCacheBuffer } from '../qmccache';
import fs from 'fs';
const expectedBuffer = fs.readFileSync(__dirname + '/fixture/qmc_cache_expected.bin');
const createInputBuffer = () => {
const buffer = Buffer.alloc(256);
for (let i = buffer.byteLength; i >= 0; i--) {
buffer[i] = i;
}
return buffer;
};
describe('decrypt/qmccache', () => {
it('should decrypt specified buffer correctly', () => {
const input = createInputBuffer();
DecryptQmcCacheBuffer(input);
expect(input).toEqual(expectedBuffer);
});
});

Binary file not shown.

View File

@ -13,9 +13,8 @@ import { DecryptResult } from '@/decrypt/entity';
import { parseBlob as metaParseBlob } from 'music-metadata-browser';
export async function Decrypt(file: Blob, raw_filename: string, _: string): Promise<DecryptResult> {
const buffer = new Uint8Array(await GetArrayBuffer(file));
let length = buffer.length;
export function DecryptBuffer(buffer: Uint8Array | Buffer) {
let length = buffer.byteLength;
for (let i = 0; i < length; i++) {
buffer[i] ^= 0xf4;
if (buffer[i] <= 0x3f) buffer[i] = buffer[i] * 4;
@ -23,6 +22,11 @@ export async function Decrypt(file: Blob, raw_filename: string, _: string): Prom
else if (buffer[i] <= 0xbf) buffer[i] = (buffer[i] - 0x80) * 4 + 2;
else buffer[i] = (buffer[i] - 0xc0) * 4 + 3;
}
}
export async function Decrypt(file: Blob, raw_filename: string, _: string): Promise<DecryptResult> {
const buffer = new Uint8Array(await GetArrayBuffer(file));
DecryptBuffer(buffer);
let ext = SniffAudioExt(buffer, '');
const newName = SplitFilename(raw_filename);
let audioBlob: Blob;