31 changed files with 691 additions and 1009 deletions
--- a/package.json
+++ b/package.json
@ -1,7 +1,7 @@
 {
  "name": "um-react",
  "private": true,
-  "version": "0.2.0",
+  "version": "0.1.0",
  "type": "module",
  "scripts": {
    "start": "vite",
@ -21,7 +21,7 @@
    "@chakra-ui/react": "^2.7.0",
    "@emotion/react": "^11.11.0",
    "@emotion/styled": "^11.11.0",
-    "@jixun/libparakeet": "0.2.0",
+    "@jixun/libparakeet": "0.1.2",
    "@reduxjs/toolkit": "^1.9.5",
    "framer-motion": "^10.12.16",
    "immer": "^10.0.2",
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
--- a/src/components/AndroidADBPullInstruction/adb_dump.sh
+++ b/src/components/AndroidADBPullInstruction/adb_dump.sh
@ -1,2 +0,0 @@
-sh adb shell su -c "cat '{{ dir }}/{{ file }}' | gzip | base64" \
-    | base64 -d | gzip -d '{{ file }}'
--- a/src/components/ImportSecretModal.tsx
+++ b/src/components/ImportSecretModal.tsx
@ -1,46 +0,0 @@
-import {
-  Center,
-  Flex,
-  Modal,
-  ModalBody,
-  ModalCloseButton,
-  ModalContent,
-  ModalHeader,
-  ModalOverlay,
-  Tabs,
-  Text,
-} from '@chakra-ui/react';
-
-import { FileInput } from '~/components/FileInput';
-
-export interface ImportSecretModalProps {
-  clientName?: React.ReactNode;
-  children: React.ReactNode;
-  show: boolean;
-  onClose: () => void;
-  onImport: (file: File) => void;
-}
-
-export function ImportSecretModal({ clientName, children, show, onClose, onImport }: ImportSecretModalProps) {
-  const handleFileReceived = (files: File[]) => onImport(files[0]);
-
-  return (
-    <Modal isOpen={show} onClose={onClose} closeOnOverlayClick={false} scrollBehavior="inside" size="xl">
-      <ModalOverlay />
-      <ModalContent>
-        <ModalHeader>导入密钥数据库</ModalHeader>
-        <ModalCloseButton />
-        <Flex as={ModalBody} gap={2} flexDir="column" flex={1}>
-          <Center>
-            <FileInput onReceiveFiles={handleFileReceived}>拖放或点我选择含有密钥的数据库文件</FileInput>
-          </Center>
-
-          <Text mt={2}>选择你的{clientName && <>「{clientName}」</>}客户端平台以查看对应说明：</Text>
-          <Flex as={Tabs} variant="enclosed" flexDir="column" flex={1} minH={0}>
-            {children}
-          </Flex>
-        </Flex>
-      </ModalContent>
-    </Modal>
-  );
-}
--- a/src/crypto/pasreKuwo.ts
+++ b/src/crypto/pasreKuwo.ts
@ -1,25 +0,0 @@
-import { bytesToUTF8String } from '~/decrypt-worker/util/utf8Encoder';
-import { strlen } from './strlen';
-
-export interface KuwoHeader {
-  rid: string; // uint64
-  encVersion: 1 | 2; // uint32
-  quality: string;
-}
-
-export function parseKuwoHeader(view: DataView): KuwoHeader | null {
-  const magic = view.buffer.slice(view.byteOffset, view.byteOffset + 0x10);
-  if (bytesToUTF8String(magic) !== 'yeelion-kuwo-tme') {
-    return null; // not kuwo-encrypted file
-  }
-
-  const qualityBytes = new Uint8Array(view.buffer.slice(view.byteOffset + 0x30, view.byteOffset + 0x40));
-  const qualityLen = strlen(qualityBytes);
-  const quality = bytesToUTF8String(qualityBytes.slice(0, qualityLen));
-
-  return {
-    encVersion: view.getUint32(0x10, true) as 1 | 2,
-    rid: view.getUint32(0x18, true).toString(),
-    quality,
-  };
-}
--- a/src/crypto/strlen.ts
+++ b/src/crypto/strlen.ts
@ -1,9 +0,0 @@
-export function strlen(data: Uint8Array): number {
-  const n = data.byteLength;
-  for (let i = 0; i < n; i++) {
-    if (data[i] === 0) {
-      return i;
-    }
-  }
-  return n;
-}
--- a/src/decrypt-worker/crypto/kwm/kwm.ts
+++ b/src/decrypt-worker/crypto/kwm/kwm.ts
@ -1,25 +1,14 @@
 import { transformBlob } from '~/decrypt-worker/util/transformBlob';
 import type { CryptoBase } from '../CryptoBase';
 import { KWM_KEY } from './kwm.key';
-import { DecryptCommandOptions } from '~/decrypt-worker/types';
-import { makeQMCv2KeyCrypto } from '~/decrypt-worker/util/qmc2KeyCrypto';
-import { fetchParakeet } from '@jixun/libparakeet';
-import { stringToUTF8Bytes } from '~/decrypt-worker/util/utf8Encoder';

 // v1 only
 export class KWMCrypto implements CryptoBase {
  cryptoName = 'KWM';
  checkByDecryptHeader = true;

-  async decrypt(buffer: ArrayBuffer, opts: DecryptCommandOptions): Promise<Blob> {
-    const kwm2key = opts.kwm2key ?? '';
-
-    const parakeet = await fetchParakeet();
-    const keyCrypto = makeQMCv2KeyCrypto(parakeet);
-    return transformBlob(buffer, (p) => p.make.KuwoKWMv2(KWM_KEY, stringToUTF8Bytes(kwm2key), keyCrypto), {
-      cleanup: () => keyCrypto.delete(),
-      parakeet,
-    });
+  async decrypt(buffer: ArrayBuffer): Promise<Blob> {
+    return transformBlob(buffer, (p) => p.make.KuwoKWM(KWM_KEY));
  }

  public static make() {
--- a/src/decrypt-worker/crypto/qmc/qmc_v2.ts
+++ b/src/decrypt-worker/crypto/qmc/qmc_v2.ts
@ -3,8 +3,6 @@ import type { CryptoBase } from '../CryptoBase';
 import type { DecryptCommandOptions } from '~/decrypt-worker/types.ts';
 import { SEED, ENC_V2_KEY_1, ENC_V2_KEY_2 } from './qmc_v2.key.ts';
 import { fetchParakeet } from '@jixun/libparakeet';
-import { stringToUTF8Bytes } from '~/decrypt-worker/util/utf8Encoder.ts';
-import { makeQMCv2KeyCrypto } from '~/decrypt-worker/util/qmc2KeyCrypto.ts';

 export class QMC2Crypto implements CryptoBase {
  cryptoName = 'QMC/v2';
@ -38,8 +36,9 @@ export class QMC2CryptoWithKey implements CryptoBase {
    }

    const parakeet = await fetchParakeet();
-    const key = stringToUTF8Bytes(options.qmc2Key);
-    const keyCrypto = makeQMCv2KeyCrypto(parakeet);
+    const textEncoder = new TextEncoder();
+    const key = textEncoder.encode(options.qmc2Key);
+    const keyCrypto = parakeet.make.QMCv2KeyCrypto(SEED, ENC_V2_KEY_1, ENC_V2_KEY_2);
    return transformBlob(buffer, (p) => p.make.QMCv2EKey(key, keyCrypto), {
      parakeet,
      cleanup: () => keyCrypto.delete(),
--- a/src/decrypt-worker/types.ts
+++ b/src/decrypt-worker/types.ts
@ -1,6 +1,5 @@
 export interface DecryptCommandOptions {
  qmc2Key?: string;
-  kwm2key?: string;
 }

 export interface DecryptCommandPayload {
--- a/src/decrypt-worker/util/qmc2KeyCrypto.ts
+++ b/src/decrypt-worker/util/qmc2KeyCrypto.ts
@ -1,4 +0,0 @@
-import type { Parakeet } from '@jixun/libparakeet';
-import { SEED, ENC_V2_KEY_1, ENC_V2_KEY_2 } from '../crypto/qmc/qmc_v2.key';
-
-export const makeQMCv2KeyCrypto = (p: Parakeet) => p.make.QMCv2KeyCrypto(SEED, ENC_V2_KEY_1, ENC_V2_KEY_2);
--- a/src/decrypt-worker/util/utf8Encoder.ts
+++ b/src/decrypt-worker/util/utf8Encoder.ts
@ -1,10 +0,0 @@
-export const utf8Encoder = new TextEncoder();
-export const utf8Decoder = new TextDecoder('utf-8');
-
-export function stringToUTF8Bytes(str: string) {
-  return utf8Encoder.encode(str);
-}
-
-export function bytesToUTF8String(str: BufferSource) {
-  return utf8Decoder.decode(str);
-}
--- a/src/features/file-listing/fileListingSlice.ts
+++ b/src/features/file-listing/fileListingSlice.ts
@ -1,12 +1,11 @@
 import { createSlice, createAsyncThunk } from '@reduxjs/toolkit';
 import type { PayloadAction } from '@reduxjs/toolkit';
 import type { RootState } from '~/store';
+import { decryptionQueue } from '~/decrypt-worker/client';

 import type { DecryptionResult } from '~/decrypt-worker/constants';
-import type { DecryptCommandOptions } from '~/decrypt-worker/types';
-import { decryptionQueue } from '~/decrypt-worker/client';
 import { DecryptErrorType } from '~/decrypt-worker/util/DecryptError';
-import { selectQMCv2KeyByFileName, selectKWMv2Key } from '../settings/settingsSelector';
+import { selectDecryptOptionByFile } from '../settings/settingsSelector';

 export enum ProcessState {
  QUEUED = 'QUEUED',
@ -64,18 +63,7 @@ export const processFile = createAsyncThunk<
    thunkAPI.dispatch(setFileAsProcessing({ id: fileId }));
  };

-  const fileHeader = await fetch(file.raw, {
-    headers: {
-      Range: 'bytes=0-1023',
-    },
-  })
-    .then((r) => r.blob())
-    .then((r) => r.arrayBuffer());
-
-  const options: DecryptCommandOptions = {
-    qmc2Key: selectQMCv2KeyByFileName(state, file.fileName),
-    kwm2key: selectKWMv2Key(state, new DataView(fileHeader)),
-  };
+  const options = selectDecryptOptionByFile(state, file.fileName);
  return decryptionQueue.add({ id: fileId, blobURI: file.raw, options }, onPreProcess);
 });

--- a/src/features/settings/Settings.tsx
+++ b/src/features/settings/Settings.tsx
@ -26,11 +26,9 @@ import { useState } from 'react';
 import { MdExpandMore, MdMenu, MdOutlineSettingsBackupRestore } from 'react-icons/md';
 import { useAppDispatch } from '~/hooks';
 import { commitStagingChange, discardStagingChanges } from './settingsSlice';
-import { PanelKWMv2Key } from './panels/PanelKWMv2Key';

 const TABS: { name: string; Tab: () => JSX.Element }[] = [
  { name: 'QMCv2 密钥', Tab: PanelQMCv2Key },
-  { name: 'KWMv2 密钥', Tab: PanelKWMv2Key },
  {
    name: '其它／待定',
    Tab: () => <Text>这里空空如也～</Text>,
--- a/src/features/settings/keyFormats.ts
+++ b/src/features/settings/keyFormats.ts
@ -1,73 +0,0 @@
-import { nanoid } from 'nanoid';
-import { objectify } from 'radash';
-
-export function productionKeyToStaging<S, P extends Record<string, unknown>>(
-  src: P,
-  make: (k: keyof P, v: P[keyof P]) => null | S
-): S[] {
-  const result: S[] = [];
-  for (const [key, value] of Object.entries(src)) {
-    const item = make(key, value as P[keyof P]);
-    if (item) {
-      result.push(item);
-    }
-  }
-  return result;
-}
-export function stagingKeyToProduction<S, P>(src: S[], toKey: (s: S) => keyof P, toValue: (s: S) => P[keyof P]): P {
-  return objectify(src, toKey, toValue) as P;
-}
-
-// QMCv2 (QQ)
-export interface StagingQMCv2Key {
-  id: string;
-  name: string;
-  ekey: string;
-}
-
-export type ProductionQMCv2Keys = Record<string /* filename */, string /* ekey */>;
-
-export const qmc2StagingToProductionKey = (key: StagingQMCv2Key) => key.name.normalize();
-export const qmc2StagingToProductionValue = (key: StagingQMCv2Key) => key.ekey.trim();
-export const qmc2ProductionToStaging = (
-  key: keyof ProductionQMCv2Keys,
-  value: ProductionQMCv2Keys[keyof ProductionQMCv2Keys]
-): StagingQMCv2Key => {
-  return {
-    id: nanoid(),
-    name: key.normalize(),
-    ekey: value.trim(),
-  };
-};
-
-// KWMv2 (KuWo)
-
-export interface StagingKWMv2Key {
-  id: string;
-  rid: string;
-  quality: string;
-  ekey: string;
-}
-
-export type ProductionKWMv2Keys = Record<string /* `${rid}-${quality}` */, string /* ekey */>;
-
-export const parseKwm2ProductionKey = (key: string): null | { rid: string; quality: string } => {
-  const m = key.match(/^(\d+)-(\w+)$/);
-  if (!m) return null;
-  const [_, rid, quality] = m;
-
-  return { rid, quality };
-};
-export const kwm2StagingToProductionKey = (key: StagingKWMv2Key) => `${key.rid}-${key.quality}`;
-export const kwm2StagingToProductionValue = (key: StagingKWMv2Key) => key.ekey;
-export const kwm2ProductionToStaging = (
-  key: keyof ProductionKWMv2Keys,
-  value: ProductionKWMv2Keys[keyof ProductionKWMv2Keys]
-): null | StagingKWMv2Key => {
-  if (typeof value !== 'string') return null;
-
-  const parsed = parseKwm2ProductionKey(key);
-  if (!parsed) return null;
-
-  return { id: nanoid(), rid: parsed.rid, quality: parsed.quality, ekey: value };
-};
--- a/src/features/settings/panels/KWMv2/InstructionsPC.tsx
+++ b/src/features/settings/panels/KWMv2/InstructionsPC.tsx
@ -1,9 +0,0 @@
-import { Text } from '@chakra-ui/react';
-
-export function InstructionsPC() {
-  return (
-    <>
-      <Text>使用 Windows 客户端下载的文件不需要导入密钥。</Text>
-    </>
-  );
-}
--- a/src/features/settings/panels/KWMv2/KWMv2EKeyItem.tsx
+++ b/src/features/settings/panels/KWMv2/KWMv2EKeyItem.tsx
@ -1,76 +0,0 @@
-import {
-  HStack,
-  Icon,
-  IconButton,
-  Input,
-  InputGroup,
-  InputLeftElement,
-  InputRightElement,
-  ListItem,
-  Text,
-  VStack,
-} from '@chakra-ui/react';
-import { MdDelete, MdVpnKey } from 'react-icons/md';
-import { kwm2DeleteKey, kwm2UpdateKey } from '../../settingsSlice';
-import { useAppDispatch } from '~/hooks';
-import { memo } from 'react';
-import { StagingKWMv2Key } from '../../keyFormats';
-
-export const KWMv2EKeyItem = memo(({ id, ekey, quality, rid, i }: StagingKWMv2Key & { i: number }) => {
-  const dispatch = useAppDispatch();
-
-  const updateKey = (prop: keyof StagingKWMv2Key, e: React.ChangeEvent<HTMLInputElement>) =>
-    dispatch(kwm2UpdateKey({ id, field: prop, value: e.target.value }));
-  const deleteKey = () => dispatch(kwm2DeleteKey({ id }));
-
-  return (
-    <ListItem mt={0} pt={2} pb={2} _even={{ bg: 'gray.50' }}>
-      <HStack>
-        <Text w="2em" textAlign="center">
-          {i + 1}
-        </Text>
-
-        <VStack flex={1}>
-          <HStack flex={1} w="full">
-            <Input
-              variant="flushed"
-              placeholder="资源 ID"
-              value={rid}
-              onChange={(e) => updateKey('rid', e)}
-              type="number"
-              maxW="8em"
-            />
-            <Input
-              variant="flushed"
-              placeholder="音质格式"
-              value={quality}
-              onChange={(e) => updateKey('quality', e)}
-              flex={1}
-            />
-          </HStack>
-
-          <InputGroup size="xs">
-            <InputLeftElement pr="2">
-              <Icon as={MdVpnKey} />
-            </InputLeftElement>
-            <Input variant="flushed" placeholder="密钥" value={ekey} onChange={(e) => updateKey('ekey', e)} />
-            <InputRightElement>
-              <Text pl="2" color={ekey.length ? 'green.500' : 'red.500'}>
-                <code>{ekey.length || '?'}</code>
-              </Text>
-            </InputRightElement>
-          </InputGroup>
-        </VStack>
-
-        <IconButton
-          aria-label="删除该密钥"
-          icon={<Icon as={MdDelete} boxSize={6} />}
-          variant="ghost"
-          colorScheme="red"
-          type="button"
-          onClick={deleteKey}
-        />
-      </HStack>
-    </ListItem>
-  );
-});
--- a/src/features/settings/panels/PanelKWMv2Key.tsx
+++ b/src/features/settings/panels/PanelKWMv2Key.tsx
@ -1,135 +0,0 @@
-import {
-  Box,
-  Button,
-  ButtonGroup,
-  Code,
-  Flex,
-  HStack,
-  Heading,
-  Icon,
-  IconButton,
-  List,
-  Menu,
-  MenuButton,
-  MenuDivider,
-  MenuItem,
-  MenuList,
-  Tab,
-  TabList,
-  TabPanel,
-  TabPanels,
-  Text,
-  useToast,
-} from '@chakra-ui/react';
-import { useState } from 'react';
-import { useDispatch, useSelector } from 'react-redux';
-import { MdAdd, MdDeleteForever, MdExpandMore, MdFileUpload } from 'react-icons/md';
-
-import { ImportSecretModal } from '~/components/ImportSecretModal';
-import { MMKVParser } from '~/util/MMKVParser';
-
-import { kwm2AddKey, kwm2ClearKeys, kwm2ImportKeys } from '../settingsSlice';
-import { selectStagingKWMv2Keys } from '../settingsSelector';
-import { KWMv2EKeyItem } from './KWMv2/KWMv2EKeyItem';
-import type { StagingKWMv2Key } from '../keyFormats';
-import { InstructionsPC } from './KWMv2/InstructionsPC';
-import { AndroidADBPullInstruction } from '~/components/AndroidADBPullInstruction/AndroidADBPullInstruction';
-
-export function PanelKWMv2Key() {
-  const toast = useToast();
-  const dispatch = useDispatch();
-  const kwm2Keys = useSelector(selectStagingKWMv2Keys);
-  const [showImportModal, setShowImportModal] = useState(false);
-
-  const addKey = () => dispatch(kwm2AddKey());
-  const clearAll = () => dispatch(kwm2ClearKeys());
-  const handleSecretImport = async (file: File) => {
-    let keys: Omit<StagingKWMv2Key, 'id'>[] | null = null;
-    if (/cn\.kuwo\.player\.mmkv/i.test(file.name)) {
-      const fileBuffer = await file.arrayBuffer();
-      keys = MMKVParser.parseKuwoEKey(new DataView(fileBuffer));
-    }
-
-    if (keys) {
-      dispatch(kwm2ImportKeys(keys));
-      setShowImportModal(false);
-      toast({
-        title: `导入完成，共导入了 ${keys.length} 个密钥。`,
-        description: '记得按下「保存」来应用。',
-        isClosable: true,
-        status: 'success',
-      });
-    } else {
-      toast({
-        title: `不支持的文件：${file.name}`,
-        isClosable: true,
-        status: 'error',
-      });
-    }
-  };
-
-  return (
-    <Flex minH={0} flexDir="column" flex={1}>
-      <Heading as="h2" size="lg">
-        酷我解密密钥（KwmV2）
-      </Heading>
-
-      <Text>
-        酷我安卓版本的「臻品音质」已经换用 V2 版，后缀名为 <Code>mflac</Code> 或沿用旧的 <Code>kwm</Code>。{''}
-        该格式需要提取密钥后才能正常解密。
-      </Text>
-
-      <HStack pb={2} pt={2}>
-        <ButtonGroup isAttached colorScheme="purple" variant="outline">
-          <Button onClick={addKey} leftIcon={<Icon as={MdAdd} />}>
-            添加一条密钥
-          </Button>
-          <Menu>
-            <MenuButton as={IconButton} icon={<MdExpandMore />}></MenuButton>
-            <MenuList>
-              <MenuItem onClick={() => setShowImportModal(true)} icon={<Icon as={MdFileUpload} boxSize={5} />}>
-                从文件导入密钥
-              </MenuItem>
-              <MenuDivider />
-              <MenuItem color="red" onClick={clearAll} icon={<Icon as={MdDeleteForever} boxSize={5} />}>
-                清空密钥
-              </MenuItem>
-            </MenuList>
-          </Menu>
-        </ButtonGroup>
-      </HStack>
-
-      <Box flex={1} minH={0} overflow="auto" pr="4">
-        <List spacing={3}>
-          {kwm2Keys.map(({ id, ekey, quality, rid }, i) => (
-            <KWMv2EKeyItem key={id} id={id} ekey={ekey} quality={quality} rid={rid} i={i} />
-          ))}
-        </List>
-        {kwm2Keys.length === 0 && <Text>还没有添加密钥。</Text>}
-      </Box>
-
-      <ImportSecretModal
-        clientName="酷我音乐"
-        show={showImportModal}
-        onClose={() => setShowImportModal(false)}
-        onImport={handleSecretImport}
-      >
-        <TabList>
-          <Tab>安卓</Tab>
-          <Tab>Windows</Tab>
-        </TabList>
-        <TabPanels flex={1} overflow="auto">
-          <TabPanel>
-            <AndroidADBPullInstruction
-              dir="/data/data/cn.kuwo.player/files/mmkv"
-              file="cn.kuwo.player.mmkv.defaultconfig"
-            />
-          </TabPanel>
-          <TabPanel>
-            <InstructionsPC />
-          </TabPanel>
-        </TabPanels>
-      </ImportSecretModal>
-    </Flex>
-  );
-}
--- a/src/features/settings/panels/PanelQMCv2Key.tsx
+++ b/src/features/settings/panels/PanelQMCv2Key.tsx
@ -14,33 +14,19 @@ import {
  MenuDivider,
  MenuItem,
  MenuList,
-  Tab,
-  TabList,
-  TabPanel,
-  TabPanels,
  Text,
  Tooltip,
-  useToast,
 } from '@chakra-ui/react';
 import { useDispatch, useSelector } from 'react-redux';
-import { qmc2AddKey, qmc2AllowFuzzyNameSearch, qmc2ClearKeys, qmc2ImportKeys } from '../settingsSlice';
+import { qmc2AddKey, qmc2AllowFuzzyNameSearch, qmc2ClearKeys } from '../settingsSlice';
 import { selectStagingQMCv2Settings } from '../settingsSelector';
 import React, { useState } from 'react';
 import { MdAdd, MdDeleteForever, MdExpandMore, MdFileUpload } from 'react-icons/md';
-import { QMCv2EKeyItem } from './QMCv2/QMCv2EKeyItem';
+import { ImportFileModal } from './QMCv2/ImportFileModal';
+import { KeyInput } from './QMCv2/KeyInput';
 import { InfoOutlineIcon } from '@chakra-ui/icons';
-import { ImportSecretModal } from '~/components/ImportSecretModal';
-import { StagingQMCv2Key } from '../keyFormats';
-import { DatabaseKeyExtractor } from '~/util/DatabaseKeyExtractor';
-import { MMKVParser } from '~/util/MMKVParser';
-import { getFileName } from '~/util/pathHelper';
-import { InstructionsIOS } from './QMCv2/InstructionsIOS';
-import { InstructionsMac } from './QMCv2/InstructionsMac';
-import { InstructionsPC } from './QMCv2/InstructionsPC';
-import { AndroidADBPullInstruction } from '~/components/AndroidADBPullInstruction/AndroidADBPullInstruction';

 export function PanelQMCv2Key() {
-  const toast = useToast();
  const dispatch = useDispatch();
  const { keys: qmc2Keys, allowFuzzyNameSearch } = useSelector(selectStagingQMCv2Settings);
  const [showImportModal, setShowImportModal] = useState(false);
@ -52,44 +38,6 @@ export function PanelQMCv2Key() {
    dispatch(qmc2AllowFuzzyNameSearch({ enable: e.target.checked }));
  };

-  const handleSecretImport = async (file: File) => {
-    try {
-      const fileBuffer = await file.arrayBuffer();
-
-      let qmc2Keys: null | Omit<StagingQMCv2Key, 'id'>[] = null;
-
-      if (/[_.]db$/i.test(file.name)) {
-        const extractor = await DatabaseKeyExtractor.getInstance();
-        qmc2Keys = extractor.extractQmAndroidDbKeys(fileBuffer);
-        if (!qmc2Keys) {
-          alert(`不是支持的 SQLite 数据库文件。\n表名：${qmc2Keys}`);
-          return;
-        }
-      } else if (/MMKVStreamEncryptId|filenameEkeyMap/i.test(file.name)) {
-        const fileBuffer = await file.arrayBuffer();
-        const map = MMKVParser.toStringMap(new DataView(fileBuffer));
-        qmc2Keys = Array.from(map.entries(), ([name, ekey]) => ({ name: getFileName(name), ekey }));
-      }
-
-      if (qmc2Keys) {
-        dispatch(qmc2ImportKeys(qmc2Keys));
-        setShowImportModal(false);
-        toast({
-          title: `导入成功 (${qmc2Keys.length})`,
-          description: '记得保存更改来应用。',
-          isClosable: true,
-          duration: 5000,
-          status: 'success',
-        });
-      } else {
-        alert(`不支持的文件：${file.name}`);
-      }
-    } catch (e) {
-      console.error('error during import: ', e);
-      alert(`导入数据库时发生错误：${e}`);
-    }
-  };
-
  return (
    <Flex minH={0} flexDir="column" flex={1}>
      <Heading as="h2" size="lg">
@ -151,40 +99,14 @@ export function PanelQMCv2Key() {

      <Box flex={1} minH={0} overflow="auto" pr="4">
        <List spacing={3}>
-          {qmc2Keys.map(({ id, ekey, name }, i) => (
-            <QMCv2EKeyItem key={id} id={id} ekey={ekey} name={name} i={i} />
+          {qmc2Keys.map(({ id, key, name }, i) => (
+            <KeyInput key={id} id={id} ekey={key} name={name} i={i} />
          ))}
        </List>
        {qmc2Keys.length === 0 && <Text>还没有添加密钥。</Text>}
      </Box>

-      <ImportSecretModal
-        clientName="QQ 音乐"
-        show={showImportModal}
-        onClose={() => setShowImportModal(false)}
-        onImport={handleSecretImport}
-      >
-        <TabList>
-          <Tab>安卓</Tab>
-          <Tab>iOS</Tab>
-          <Tab>Mac</Tab>
-          <Tab>Windows</Tab>
-        </TabList>
-        <TabPanels flex={1} overflow="auto">
-          <TabPanel>
-            <AndroidADBPullInstruction dir="/data/data/com.tencent.qqmusic/databases" file="player_process_db" />
-          </TabPanel>
-          <TabPanel>
-            <InstructionsIOS />
-          </TabPanel>
-          <TabPanel>
-            <InstructionsMac />
-          </TabPanel>
-          <TabPanel>
-            <InstructionsPC />
-          </TabPanel>
-        </TabPanels>
-      </ImportSecretModal>
+      <ImportFileModal show={showImportModal} onClose={() => setShowImportModal(false)} />
    </Flex>
  );
 }
--- a/src/features/settings/panels/QMCv2/ImportFileModal.tsx
+++ b/src/features/settings/panels/QMCv2/ImportFileModal.tsx
@ -0,0 +1,122 @@
+import {
+  Center,
+  Flex,
+  Modal,
+  ModalBody,
+  ModalCloseButton,
+  ModalContent,
+  ModalHeader,
+  ModalOverlay,
+  Tab,
+  TabList,
+  TabPanel,
+  TabPanels,
+  Tabs,
+  Text,
+  useToast,
+} from '@chakra-ui/react';
+
+import { FileInput } from '~/components/FileInput';
+import { qmc2ImportKeys } from '../../settingsSlice';
+import { useAppDispatch } from '~/hooks';
+import { DatabaseKeyExtractor } from '~/util/DatabaseKeyExtractor';
+
+import { InstructionsAndroid } from './InstructionsAndroid';
+import { MMKVParser } from '~/util/MMKVParser';
+import { getFileName } from '~/util/pathHelper';
+import { InstructionsMac } from './InstructionsMac';
+import { InstructionsIOS } from './InstructionsIOS';
+import { InstructionsPC } from './InstructionsPC';
+
+export interface ImportFileModalProps {
+  show: boolean;
+  onClose: () => void;
+}
+
+interface KeyEntry {
+  name: string;
+  key: string;
+}
+
+export function ImportFileModal({ onClose, show }: ImportFileModalProps) {
+  const dispatch = useAppDispatch();
+  const toast = useToast();
+  const handleFileReceived = async (files: File[]) => {
+    try {
+      const file = files[0];
+      const fileBuffer = await file.arrayBuffer();
+
+      let qmc2Keys: null | KeyEntry[] = null;
+
+      if (/[_.]db$/i.test(file.name)) {
+        const extractor = await DatabaseKeyExtractor.getInstance();
+        qmc2Keys = extractor.extractQmAndroidDbKeys(fileBuffer);
+        if (!qmc2Keys) {
+          alert(`不是支持的 SQLite 数据库文件。\n表名：${qmc2Keys}`);
+          return;
+        }
+      } else if (/MMKVStreamEncryptId|filenameEkeyMap/i.test(file.name)) {
+        const fileBuffer = await file.arrayBuffer();
+        const map = MMKVParser.toStringMap(new DataView(fileBuffer));
+        qmc2Keys = Array.from(map.entries(), ([name, key]) => ({ name: getFileName(name), key }));
+      }
+
+      if (qmc2Keys) {
+        dispatch(qmc2ImportKeys(qmc2Keys));
+        onClose();
+        toast({
+          title: `导入成功 (${qmc2Keys.length})`,
+          description: '记得保存更改来应用。',
+          isClosable: true,
+          duration: 5000,
+          status: 'success',
+        });
+      } else {
+        alert(`不支持的文件：${file.name}`);
+      }
+    } catch (e) {
+      console.error('error during import: ', e);
+      alert(`导入数据库时发生错误：${e}`);
+    }
+  };
+
+  return (
+    <Modal isOpen={show} onClose={onClose} closeOnOverlayClick={false} scrollBehavior="inside" size="xl">
+      <ModalOverlay />
+      <ModalContent>
+        <ModalHeader>导入密钥数据库</ModalHeader>
+        <ModalCloseButton />
+        <Flex as={ModalBody} gap={2} flexDir="column" flex={1}>
+          <Center>
+            <FileInput onReceiveFiles={handleFileReceived}>拖放或点我选择含有密钥的数据库文件</FileInput>
+          </Center>
+
+          <Text mt={2}>选择你的「QQ 音乐」客户端平台以查看对应说明：</Text>
+
+          <Flex as={Tabs} variant="enclosed" flexDir="column" flex={1} minH={0}>
+            <TabList>
+              <Tab>安卓</Tab>
+              <Tab>iOS</Tab>
+              <Tab>Mac</Tab>
+              <Tab>Windows</Tab>
+            </TabList>
+            <TabPanels flex={1} overflow="auto">
+              <TabPanel>
+                <InstructionsAndroid />
+              </TabPanel>
+              <TabPanel>
+                <InstructionsIOS />
+              </TabPanel>
+              <TabPanel>
+                <InstructionsMac />
+              </TabPanel>
+              <TabPanel>
+                <InstructionsPC />
+              </TabPanel>
+            </TabPanels>
+          </Flex>
+        </Flex>
+      </ModalContent>
+    </Modal>
+  );
+}
--- a/src/components/AndroidADBPullInstruction/AndroidADBPullInstruction.tsx
+++ b/src/components/AndroidADBPullInstruction/AndroidADBPullInstruction.tsx
@ -17,22 +17,10 @@ import { ExternalLinkIcon } from '@chakra-ui/icons';
 import { Light as SyntaxHighlighter } from 'react-syntax-highlighter';
 import hljsStyleGitHub from 'react-syntax-highlighter/dist/esm/styles/hljs/github';

-import PowerShellAdbDumpCommandTemplate from './adb_dump.ps1?raw';
-import ShellAdbDumpCommandTemplate from './adb_dump.sh?raw';
-
-const applyTemplate = (tpl: string, values: Record<string, unknown>) => {
-  return tpl.replace(/\{\{\s*(\w+)\s*\}\}/g, (_, key) => (Object.hasOwn(values, key) ? String(values[key]) : '<nil>'));
-};
-
-export interface AndroidADBPullInstructionProps {
-  dir: string;
-  file: string;
-}
-
-export function AndroidADBPullInstruction({ dir, file }: AndroidADBPullInstructionProps) {
-  const psAdbDumpCommand = applyTemplate(PowerShellAdbDumpCommandTemplate, { dir, file });
-  const shAdbDumpCommand = applyTemplate(ShellAdbDumpCommandTemplate, { dir, file });
+import PowerShellAdbDumpCommand from './adb_dump.ps1?raw';
+import ShellAdbDumpCommand from './adb_dump.sh?raw';

+export function InstructionsAndroid() {
  return (
    <>
      <Text>
@ -62,12 +50,12 @@ export function AndroidADBPullInstruction({ dir, file }: AndroidADBPullInstructi
              </ListItem>
              <ListItem>
                <Text>
-                  访问 <Code>{dir}/</Code> 目录。
+                  访问 <Code>/data/data/com.tencent.qqmusic/databases/</Code> 目录。
                </Text>
              </ListItem>
              <ListItem>
                <Text>
-                  将文件 <Code>{file}</Code> 复制到浏览器可访问的目录。
+                  将文件 <Code>player_process_db</Code> 复制到浏览器可访问的目录。
                  <br />
                  （例如下载目录）
                </Text>
@ -111,12 +99,12 @@ export function AndroidADBPullInstruction({ dir, file }: AndroidADBPullInstructi
              <ListItem>
                <Text>粘贴执行下述代码。若设备提示「超级用户请求」请允许：</Text>
                <SyntaxHighlighter language="ps1" style={hljsStyleGitHub}>
-                  {psAdbDumpCommand}
+                  {PowerShellAdbDumpCommand}
                </SyntaxHighlighter>
              </ListItem>
              <ListItem>
                <Text>
-                  提交当前目录下的 <Code>{file}</Code> 文件。
+                  提交当前目录下的 <Code>player_process_db</Code> 文件。
                </Text>
              </ListItem>
            </OrderedList>
@ -140,12 +128,12 @@ export function AndroidADBPullInstruction({ dir, file }: AndroidADBPullInstructi
              <ListItem>
                <Text>粘贴执行下述代码。若设备提示「超级用户请求」请允许：</Text>
                <SyntaxHighlighter language="bash" style={hljsStyleGitHub}>
-                  {shAdbDumpCommand}
+                  {ShellAdbDumpCommand}
                </SyntaxHighlighter>
              </ListItem>
              <ListItem>
                <Text>
-                  提交当前目录下的 <Code>{file}</Code> 文件。
+                  提交当前目录下的 <Code>player_process_db</Code> 文件。
                </Text>
              </ListItem>
            </OrderedList>
--- a/src/features/settings/panels/QMCv2/QMCv2EKeyItem.tsx
+++ b/src/features/settings/panels/QMCv2/QMCv2EKeyItem.tsx
@ -15,10 +15,10 @@ import { qmc2DeleteKey, qmc2UpdateKey } from '../../settingsSlice';
 import { useAppDispatch } from '~/hooks';
 import { memo } from 'react';

-export const QMCv2EKeyItem = memo(({ id, name, ekey, i }: { id: string; name: string; ekey: string; i: number }) => {
+export const KeyInput = memo(({ id, name, ekey, i }: { id: string; name: string; ekey: string; i: number }) => {
  const dispatch = useAppDispatch();

-  const updateKey = (prop: 'name' | 'ekey', e: React.ChangeEvent<HTMLInputElement>) =>
+  const updateKey = (prop: 'name' | 'key', e: React.ChangeEvent<HTMLInputElement>) =>
    dispatch(qmc2UpdateKey({ id, field: prop, value: e.target.value }));
  const deleteKey = () => dispatch(qmc2DeleteKey({ id }));

@ -36,7 +36,7 @@ export const QMCv2EKeyItem = memo(({ id, name, ekey, i }: { id: string; name: st
            <InputLeftElement pr="2">
              <Icon as={MdVpnKey} />
            </InputLeftElement>
-            <Input variant="flushed" placeholder="密钥" value={ekey} onChange={(e) => updateKey('ekey', e)} />
+            <Input variant="flushed" placeholder="密钥" value={ekey} onChange={(e) => updateKey('key', e)} />
            <InputRightElement>
              <Text pl="2" color={ekey.length ? 'green.500' : 'red.500'}>
                <code>{ekey.length || '?'}</code>
--- a/src/components/AndroidADBPullInstruction/adb_dump.ps1
+++ b/src/components/AndroidADBPullInstruction/adb_dump.ps1
@ -1,8 +1,8 @@
 try {
-	$gz_b64 = adb shell su -c "cat '{{ dir }}/{{ file }}' | gzip | base64" | Out-String
+	$gz_b64 = adb shell su -c "cat '/data/data/com.tencent.qqmusic/databases/player_process_db' | gzip | base64" | Out-String
 	$bStream = New-Object System.IO.MemoryStream(,[System.Convert]::FromBase64String($gz_b64))
 	$decoded = New-Object System.IO.Compression.GzipStream($bStream, [System.IO.Compression.CompressionMode]::Decompress)
-	$outFile = New-Object System.IO.FileStream("{{ file }}", [System.IO.FileMode]::Create, [System.IO.FileAccess]::Write)
+	$outFile = New-Object System.IO.FileStream("player_process_db", [System.IO.FileMode]::Create, [System.IO.FileAccess]::Write)
 	$decoded.CopyTo($outFile)
 } finally {
 	if ($outFile -ne $null) { $outFile.Dispose() }
--- a/src/features/settings/panels/QMCv2/adb_dump.sh
+++ b/src/features/settings/panels/QMCv2/adb_dump.sh
@ -0,0 +1,2 @@
+sh adb shell su -c "cat '/data/data/com.tencent.qqmusic/databases/player_process_db' | gzip | base64" \
+    | base64 -d | gzip -d player_process_db
--- a/src/features/settings/persistSettings.ts
+++ b/src/features/settings/persistSettings.ts
@ -5,7 +5,6 @@ import type { AppStore } from '~/store';
 import { settingsSlice, setProductionChanges, ProductionSettings } from './settingsSlice';
 import { enumObject } from '~/util/objects';
 import { getLogger } from '~/util/logUtils';
-import { parseKwm2ProductionKey } from './keyFormats';

 const DEFAULT_STORAGE_KEY = 'um-react-settings';

@ -23,16 +22,6 @@ function mergeSettings(settings: ProductionSettings): ProductionSettings {
        draft.qmc2.allowFuzzyNameSearch = allowFuzzyNameSearch;
      }
    }
-
-    if (settings?.kwm2) {
-      const { keys } = settings.kwm2;
-
-      for (const [k, v] of enumObject(keys)) {
-        if (typeof v === 'string' && parseKwm2ProductionKey(k)) {
-          draft.kwm2.keys[k] = v;
-        }
-      }
-    }
  });
 }

--- a/src/features/settings/settingsSelector.ts
+++ b/src/features/settings/settingsSelector.ts
@ -1,47 +1,28 @@
-import { parseKuwoHeader } from '~/crypto/pasreKuwo';
+import type { DecryptCommandOptions } from '~/decrypt-worker/types';
 import type { RootState } from '~/store';
 import { closestByLevenshtein } from '~/util/levenshtein';
 import { hasOwn } from '~/util/objects';
-import { kwm2StagingToProductionKey } from './keyFormats';

 export const selectStagingQMCv2Settings = (state: RootState) => state.settings.staging.qmc2;
 export const selectFinalQMCv2Settings = (state: RootState) => state.settings.production.qmc2;

-export const selectStagingKWMv2Keys = (state: RootState) => state.settings.staging.kwm2.keys;
-export const selectFinalKWMv2Keys = (state: RootState) => state.settings.production.kwm2.keys;
-
-export const selectQMCv2KeyByFileName = (state: RootState, name: string): string | undefined => {
+export const selectDecryptOptionByFile = (state: RootState, name: string): DecryptCommandOptions => {
  const normalizedName = name.normalize();

-  let ekey: string | undefined;
-  const { keys, allowFuzzyNameSearch } = selectFinalQMCv2Settings(state);
-  if (hasOwn(keys, normalizedName)) {
-    ekey = keys[normalizedName];
+  let qmc2Key: string | undefined;
+  const { keys: qmc2Keys, allowFuzzyNameSearch } = selectFinalQMCv2Settings(state);
+  if (hasOwn(qmc2Keys, normalizedName)) {
+    qmc2Key = qmc2Keys[normalizedName];
  } else if (allowFuzzyNameSearch) {
-    const qmc2KeyStoreNames = Object.keys(keys);
+    const qmc2KeyStoreNames = Object.keys(qmc2Keys);
    if (qmc2KeyStoreNames.length > 0) {
      const closestName = closestByLevenshtein(normalizedName, qmc2KeyStoreNames);
      console.debug('qmc2: key db could not find %o, using closest %o instead.', normalizedName, closestName);
-      ekey = keys[closestName];
+      qmc2Key = qmc2Keys[closestName];
    }
  }

-  return ekey;
+  return {
+    qmc2Key,
  };
-
-export const selectKWMv2Key = (state: RootState, headerView: DataView): string | undefined => {
-  const hdr = parseKuwoHeader(headerView);
-  if (!hdr) {
-    return;
-  }
-
-  const keys = selectFinalKWMv2Keys(state);
-  const lookupKey = kwm2StagingToProductionKey({ id: '', ekey: '', quality: hdr.quality, rid: hdr.rid });
-
-  let ekey: string | undefined;
-  if (hasOwn(keys, lookupKey)) {
-    ekey = keys[lookupKey];
-  }
-
-  return ekey;
 };
--- a/src/features/settings/settingsSlice.ts
+++ b/src/features/settings/settingsSlice.ts
@ -1,39 +1,20 @@
 import { createSlice } from '@reduxjs/toolkit';
 import type { PayloadAction } from '@reduxjs/toolkit';
 import { nanoid } from 'nanoid';
-import {
-  ProductionKWMv2Keys,
-  ProductionQMCv2Keys,
-  StagingKWMv2Key,
-  StagingQMCv2Key,
-  kwm2ProductionToStaging,
-  kwm2StagingToProductionKey,
-  kwm2StagingToProductionValue,
-  productionKeyToStaging,
-  qmc2ProductionToStaging,
-  qmc2StagingToProductionKey,
-  qmc2StagingToProductionValue,
-  stagingKeyToProduction,
-} from './keyFormats';
+import { objectify } from 'radash';

 export interface StagingSettings {
  qmc2: {
-    keys: StagingQMCv2Key[];
+    keys: { id: string; name: string; key: string }[];
    allowFuzzyNameSearch: boolean;
  };
-  kwm2: {
-    keys: StagingKWMv2Key[];
-  };
 }

 export interface ProductionSettings {
  qmc2: {
-    keys: ProductionQMCv2Keys; // {  [fileName]: ekey  }
+    keys: Record<string, string>; // {  [fileName]: ekey  }
    allowFuzzyNameSearch: boolean;
  };
-  kwm2: {
-    keys: ProductionKWMv2Keys; // { [`${rid}-${quality}`]: ekey }
-  };
 }

 export interface SettingsState {
@ -42,33 +23,35 @@ export interface SettingsState {
 }
 const initialState: SettingsState = {
  staging: {
-    qmc2: { allowFuzzyNameSearch: false, keys: [] },
-    kwm2: { keys: [] },
+    qmc2: {
+      allowFuzzyNameSearch: false,
+      keys: [],
+    },
  },
  production: {
-    qmc2: { allowFuzzyNameSearch: false, keys: {} },
-    kwm2: { keys: {} },
+    qmc2: {
+      allowFuzzyNameSearch: false,
+      keys: {},
+    },
  },
 };

 const stagingToProduction = (staging: StagingSettings): ProductionSettings => ({
  qmc2: {
-    keys: stagingKeyToProduction(staging.qmc2.keys, qmc2StagingToProductionKey, qmc2StagingToProductionValue),
+    keys: objectify(
+      staging.qmc2.keys,
+      (item) => item.name.normalize(),
+      (item) => item.key.trim()
+    ),
    allowFuzzyNameSearch: staging.qmc2.allowFuzzyNameSearch,
  },
-  kwm2: {
-    keys: stagingKeyToProduction(staging.kwm2.keys, kwm2StagingToProductionKey, kwm2StagingToProductionValue),
-  },
 });

 const productionToStaging = (production: ProductionSettings): StagingSettings => ({
  qmc2: {
-    keys: productionKeyToStaging(production.qmc2.keys, qmc2ProductionToStaging),
+    keys: Object.entries(production.qmc2.keys).map(([name, key]) => ({ id: nanoid(), name, key })),
    allowFuzzyNameSearch: production.qmc2.allowFuzzyNameSearch,
  },
-  kwm2: {
-    keys: productionKeyToStaging(production.kwm2.keys, kwm2ProductionToStaging),
-  },
 });

 export const settingsSlice = createSlice({
@ -81,11 +64,10 @@ export const settingsSlice = createSlice({
        staging: productionToStaging(payload),
      };
    },
-    //
    qmc2AddKey(state) {
-      state.staging.qmc2.keys.push({ id: nanoid(), name: '', ekey: '' });
+      state.staging.qmc2.keys.push({ id: nanoid(), name: '', key: '' });
    },
-    qmc2ImportKeys(state, { payload }: PayloadAction<Omit<StagingQMCv2Key, 'id'>[]>) {
+    qmc2ImportKeys(state, { payload }: PayloadAction<{ name: string; key: string }[]>) {
      const newItems = payload.map((item) => ({ id: nanoid(), ...item }));
      state.staging.qmc2.keys.push(...newItems);
    },
@ -95,7 +77,7 @@ export const settingsSlice = createSlice({
    },
    qmc2UpdateKey(
      state,
-      { payload: { id, field, value } }: PayloadAction<{ id: string; field: keyof StagingQMCv2Key; value: string }>
+      { payload: { id, field, value } }: PayloadAction<{ id: string; field: 'name' | 'key'; value: string }>
    ) {
      const keyItem = state.staging.qmc2.keys.find((item) => item.id === id);
      if (keyItem) {
@ -108,31 +90,6 @@ export const settingsSlice = createSlice({
    qmc2AllowFuzzyNameSearch(state, { payload: { enable } }: PayloadAction<{ enable: boolean }>) {
      state.staging.qmc2.allowFuzzyNameSearch = enable;
    },
-    // TODO: reuse the logic somehow?
-    kwm2AddKey(state) {
-      state.staging.kwm2.keys.push({ id: nanoid(), ekey: '', quality: '', rid: '' });
-    },
-    kwm2ImportKeys(state, { payload }: PayloadAction<Omit<StagingKWMv2Key, 'id'>[]>) {
-      const newItems = payload.map((item) => ({ id: nanoid(), ...item }));
-      state.staging.kwm2.keys.push(...newItems);
-    },
-    kwm2DeleteKey(state, { payload: { id } }: PayloadAction<{ id: string }>) {
-      const kwm2 = state.staging.kwm2;
-      kwm2.keys = kwm2.keys.filter((item) => item.id !== id);
-    },
-    kwm2UpdateKey(
-      state,
-      { payload: { id, field, value } }: PayloadAction<{ id: string; field: keyof StagingKWMv2Key; value: string }>
-    ) {
-      const keyItem = state.staging.kwm2.keys.find((item) => item.id === id);
-      if (keyItem) {
-        keyItem[field] = value;
-      }
-    },
-    kwm2ClearKeys(state) {
-      state.staging.kwm2.keys = [];
-    },
-    //
    discardStagingChanges: (state) => {
      state.staging = productionToStaging(state.production);
    },
@ -161,12 +118,6 @@ export const {
  qmc2ImportKeys,
  qmc2AllowFuzzyNameSearch,

-  kwm2AddKey,
-  kwm2UpdateKey,
-  kwm2DeleteKey,
-  kwm2ClearKeys,
-  kwm2ImportKeys,
-
  commitStagingChange,
  discardStagingChanges,
 } = settingsSlice.actions;
--- a/src/util/DatabaseKeyExtractor.ts
+++ b/src/util/DatabaseKeyExtractor.ts
@ -3,7 +3,7 @@ import { SQLDatabase, SQLStatic, loadSQL } from './sqlite';

 export interface QMAndroidKeyEntry {
  name: string;
-  ekey: string;
+  key: string;
 }

 export class DatabaseKeyExtractor {
@ -33,10 +33,10 @@ export class DatabaseKeyExtractor {
      }

      const keys = db.exec('select file_path, ekey from `audio_file_ekey_table`')[0].values;
-      return keys.map(([path, ekey]) => ({
+      return keys.map(([path, key]) => ({
        // strip dir name
        name: getFileName(String(path)),
-        ekey: String(ekey),
+        key: String(key),
      }));
    } finally {
      db?.close();
--- a/src/util/MMKVParser.ts
+++ b/src/util/MMKVParser.ts
@ -1,7 +1,7 @@
-import type { StagingKWMv2Key } from '~/features/settings/keyFormats';
-import { bytesToUTF8String } from '~/decrypt-worker/util/utf8Encoder';
 import { formatHex } from './formatHex';

+const textDecoder = new TextDecoder('utf-8', { ignoreBOM: true });
+
 export class MMKVParser {
  private offset = 4;
  private length: number;
@ -66,7 +66,7 @@ export class MMKVParser {
    // ]
    const strByteLen = this.readInt();
    const data = this.readBytes(strByteLen);
-    return bytesToUTF8String(data).normalize();
+    return textDecoder.decode(data).normalize();
  }

  public readVariantString() {
@ -85,15 +85,6 @@ export class MMKVParser {
    return result;
  }

-  public skipContainer() {
-    // Container [
-    //   len: int,
-    //   data: variant
-    // ]
-    const containerLen = this.readInt();
-    this.offset += containerLen;
-  }
-
  public static toStringMap(view: DataView): Map<string, string> {
    const mmkv = new MMKVParser(view);
    const result = new Map<string, string>();
@ -104,22 +95,4 @@ export class MMKVParser {
    }
    return result;
  }
-
-  public static parseKuwoEKey(view: DataView) {
-    const mmkv = new MMKVParser(view);
-    const result: Omit<StagingKWMv2Key, 'id'>[] = [];
-    while (!mmkv.eof) {
-      const key = mmkv.readString();
-      const idMatch = key.match(/^sec_ekey#(\d+)-(.+)/);
-      if (!idMatch) {
-        mmkv.skipContainer();
-        continue;
-      }
-
-      const [_, rid, quality] = idMatch;
-      const ekey = mmkv.readVariantString();
-      result.push({ rid, quality, ekey });
-    }
-    return result;
-  }
 }
--- a/src/util/tests/splitN.ts.test.ts
+++ b/src/util/tests/splitN.ts.test.ts
@ -1,10 +0,0 @@
-import { splitN } from '../splitN';
-
-test('some test cases', () => {
-  expect(splitN('1,2,3', ',', 2)).toEqual(['1', '2,3']);
-  expect(splitN('1,2,3', ',', 3)).toEqual(['1', '2', '3']);
-  expect(splitN('1,2,3', ',', 4)).toEqual(['1', '2', '3']);
-
-  expect(splitN('1,2,3', '.', 3)).toEqual(['1,2,3']);
-  expect(splitN('1,2,3', '?', 0)).toEqual(['1,2,3']);
-});
--- a/src/util/levenshtein.ts
+++ b/src/util/levenshtein.ts
@ -1,6 +1,6 @@
-// translation of pseudocode from Wikipedia:
-import { stringToUTF8Bytes } from '~/decrypt-worker/util/utf8Encoder';
+const textEncoder = new TextEncoder();

+// translation of pseudocode from Wikipedia:
 // https://en.wikipedia.org/wiki/Levenshtein_distance#Iterative_with_two_matrix_rows
 export function levenshtein(str1: string, str2: string) {
  if (str1 === str2) {
@ -14,8 +14,8 @@ export function levenshtein(str1: string, str2: string) {
  }

  // Convert them to Uint8Array to avoid expensive string APIs.
-  const s = stringToUTF8Bytes(str1.normalize().toLowerCase());
-  const t = stringToUTF8Bytes(str2.normalize().toLowerCase());
+  const s = textEncoder.encode(str1.toLowerCase());
+  const t = textEncoder.encode(str2.toLowerCase());
  const m = s.byteLength;
  const n = t.byteLength;

--- a/src/util/splitN.ts
+++ b/src/util/splitN.ts
@ -1,20 +0,0 @@
-export function splitN(str: string, sep: string, maxN: number) {
-  if (maxN <= 1) {
-    return [str];
-  }
-
-  const chunks: string[] = [];
-  const lenSep = sep.length;
-  let searchIdx = 0;
-  for (; maxN > 1; maxN--) {
-    const nextIdx = str.indexOf(sep, searchIdx);
-    if (nextIdx === -1) {
-      break;
-    }
-    chunks.push(str.slice(searchIdx, nextIdx));
-    searchIdx = nextIdx + lenSep;
-  }
-
-  chunks.push(str.slice(searchIdx));
-  return chunks;
-}