feat: fix mmkv parser, support for ios ekey mmkv
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f787e1c3f8
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1
.gitattributes
vendored
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1
.gitattributes
vendored
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@ -0,0 +1 @@
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*.mmkv binary
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@ -52,7 +52,7 @@ export function ImportFileModal({ onClose, show }: ImportFileModalProps) {
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alert(`不是支持的 SQLite 数据库文件。\n表名:${qmc2Keys}`);
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return;
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}
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} else if (/MMKVStreamEncryptId/i.test(file.name)) {
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} else if (/MMKVStreamEncryptId|filenameEkeyMap/i.test(file.name)) {
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const fileBuffer = await file.arrayBuffer();
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const map = MMKVParser.toStringMap(new DataView(fileBuffer));
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qmc2Keys = Array.from(map.entries(), ([name, key]) => ({ name: getFileName(name), key }));
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@ -1,28 +1,29 @@
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import { formatHex } from './formatHex';
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const textDecoder = new TextDecoder('utf-8', { ignoreBOM: true });
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export class MMKVParser {
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private offset = 8;
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private offset = 4;
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private length: number;
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constructor(private view: DataView) {
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const payloadLength = view.getUint32(0, true);
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this.length = 4 + payloadLength;
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// skip unused str
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this.readInt();
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}
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toString() {
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const offset = this.offset.toString(16).padStart(8, '0');
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const length = this.length.toString(16).padStart(8, '0');
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return `<MMKVParser offset=0x${offset} len=0x${length}>`;
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const offset = formatHex(this.offset, 8);
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const length = formatHex(this.length, 8);
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return `<MMKVParser offset=${offset} len=${length}>`;
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}
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get eof() {
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return this.offset >= this.length;
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}
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peek() {
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return this.view.getUint8(this.offset);
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}
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public readByte() {
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return this.view.getUint8(this.offset++);
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}
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@ -77,7 +78,9 @@ export class MMKVParser {
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const newOffset = this.offset + containerLen;
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const result = this.readString();
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if (newOffset !== this.offset) {
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throw new Error('readVariantString failed: offset does not match');
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const expected = formatHex(newOffset);
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const actual = formatHex(this.offset);
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throw new Error(`readVariantString failed: offset does mismatch (expect: ${expected}, actual: ${actual})`);
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}
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return result;
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}
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19
src/util/__tests__/MMKVParser.test.ts
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19
src/util/__tests__/MMKVParser.test.ts
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@ -0,0 +1,19 @@
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import { MMKVParser } from '../MMKVParser';
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import { readFileSync } from 'node:fs';
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test('parse mmkv file as expected', () => {
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const buff = readFileSync(__dirname + '/__fixture__/test.mmkv');
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const view = new DataView(buff.buffer.slice(buff.byteOffset, buff.byteOffset + buff.byteLength));
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expect(MMKVParser.toStringMap(view)).toEqual(
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new Map([
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['key', 'value'],
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[
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'Lorem Ipsum',
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'Lorem ipsum dolor sit amet, consectetur adipiscing elit. ' +
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'Vestibulum congue volutpat metus non molestie. Quisque id est sapien. ' +
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'Fusce eget tristique sem. Donec tellus lacus, viverra sed lectus eget, elementum ultrices dolor. ' +
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'Integer non urna justo.',
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],
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])
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);
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});
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BIN
src/util/__tests__/__fixture__/test.mmkv
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BIN
src/util/__tests__/__fixture__/test.mmkv
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Binary file not shown.
3
src/util/formatHex.ts
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3
src/util/formatHex.ts
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@ -0,0 +1,3 @@
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export function formatHex(value: number, len = 8) {
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return '0x' + (value | 0).toString(16).padStart(len, '0');
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}
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