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@@ -0,0 +1,1383 @@
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import { app, BrowserWindow } from 'electron'
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import { basename, dirname, extname, join } from 'path'
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import { pathToFileURL } from 'url'
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import { existsSync, mkdirSync, readdirSync, readFileSync, statSync } from 'fs'
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import { writeFile } from 'fs/promises'
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import crypto from 'crypto'
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import { Worker } from 'worker_threads'
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import { ConfigService } from './config'
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import { wcdbService } from './wcdbService'
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type DecryptResult = {
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success: boolean
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localPath?: string
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error?: string
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isThumb?: boolean // 是否是缩略图（没有高清图时返回缩略图）
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}
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type HardlinkState = {
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imageTable?: string
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dirTable?: string
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}
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export class ImageDecryptService {
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private configService = new ConfigService()
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private hardlinkCache = new Map<string, HardlinkState>()
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private resolvedCache = new Map<string, string>()
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private pending = new Map<string, Promise<DecryptResult>>()
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private readonly defaultV1AesKey = 'cfcd208495d565ef'
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private cacheIndexed = false
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private cacheIndexing: Promise<void> | null = null
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private updateFlags = new Map<string, boolean>()
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private logInfo(message: string, meta?: Record<string, unknown>): void {
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if (!this.configService.get('logEnabled')) return
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if (meta) {
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console.info(message, meta)
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} else {
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console.info(message)
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}
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}
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async resolveCachedImage(payload: { sessionId?: string; imageMd5?: string; imageDatName?: string }): Promise<DecryptResult & { hasUpdate?: boolean }> {
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await this.ensureCacheIndexed()
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const cacheKeys = this.getCacheKeys(payload)
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const cacheKey = cacheKeys[0]
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if (!cacheKey) {
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return { success: false, error: '缺少图片标识' }
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}
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for (const key of cacheKeys) {
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const cached = this.resolvedCache.get(key)
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if (cached && existsSync(cached) && this.isImageFile(cached)) {
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const dataUrl = this.fileToDataUrl(cached)
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const isThumb = this.isThumbnailPath(cached)
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const hasUpdate = isThumb ? (this.updateFlags.get(key) ?? false) : false
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if (isThumb) {
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this.triggerUpdateCheck(payload, key, cached)
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} else {
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this.updateFlags.delete(key)
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}
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this.emitCacheResolved(payload, key, dataUrl || this.filePathToUrl(cached))
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return { success: true, localPath: dataUrl || this.filePathToUrl(cached), hasUpdate }
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}
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if (cached && !this.isImageFile(cached)) {
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this.resolvedCache.delete(key)
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}
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}
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for (const key of cacheKeys) {
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const existing = this.findCachedOutput(key, false, payload.sessionId)
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if (existing) {
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this.cacheResolvedPaths(key, payload.imageMd5, payload.imageDatName, existing)
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const dataUrl = this.fileToDataUrl(existing)
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const isThumb = this.isThumbnailPath(existing)
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const hasUpdate = isThumb ? (this.updateFlags.get(key) ?? false) : false
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if (isThumb) {
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this.triggerUpdateCheck(payload, key, existing)
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} else {
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this.updateFlags.delete(key)
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}
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this.emitCacheResolved(payload, key, dataUrl || this.filePathToUrl(existing))
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return { success: true, localPath: dataUrl || this.filePathToUrl(existing), hasUpdate }
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}
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}
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return { success: false, error: '未找到缓存图片' }
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}
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async decryptImage(payload: { sessionId?: string; imageMd5?: string; imageDatName?: string; force?: boolean }): Promise<DecryptResult> {
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await this.ensureCacheIndexed()
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const cacheKey = payload.imageMd5 || payload.imageDatName
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if (!cacheKey) {
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return { success: false, error: '缺少图片标识' }
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}
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if (!payload.force) {
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const cached = this.resolvedCache.get(cacheKey)
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if (cached && existsSync(cached) && this.isImageFile(cached)) {
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const dataUrl = this.fileToDataUrl(cached)
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const localPath = dataUrl || this.filePathToUrl(cached)
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this.emitCacheResolved(payload, cacheKey, localPath)
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return { success: true, localPath }
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}
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if (cached && !this.isImageFile(cached)) {
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this.resolvedCache.delete(cacheKey)
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}
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}
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const pending = this.pending.get(cacheKey)
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if (pending) return pending
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const task = this.decryptImageInternal(payload, cacheKey)
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this.pending.set(cacheKey, task)
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try {
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return await task
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} finally {
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this.pending.delete(cacheKey)
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}
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}
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private async decryptImageInternal(
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payload: { sessionId?: string; imageMd5?: string; imageDatName?: string; force?: boolean },
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cacheKey: string
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): Promise<DecryptResult> {
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try {
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const wxid = this.configService.get('myWxid')
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const dbPath = this.configService.get('dbPath')
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if (!wxid || !dbPath) {
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return { success: false, error: '未配置账号或数据库路径' }
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}
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const accountDir = this.resolveAccountDir(dbPath, wxid)
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if (!accountDir) {
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return { success: false, error: '未找到账号目录' }
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}
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const datPath = await this.resolveDatPath(
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accountDir,
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payload.imageMd5,
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payload.imageDatName,
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payload.sessionId,
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{ allowThumbnail: !payload.force, skipResolvedCache: Boolean(payload.force) }
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)
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// 如果要求高清图但没找到，直接返回提示
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if (!datPath && payload.force) {
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return { success: false, error: '未找到高清图，请在微信中点开该图片查看后重试' }
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}
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if (!datPath) {
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return { success: false, error: '未找到图片文件' }
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}
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if (!extname(datPath).toLowerCase().includes('dat')) {
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this.cacheResolvedPaths(cacheKey, payload.imageMd5, payload.imageDatName, datPath)
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const dataUrl = this.fileToDataUrl(datPath)
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const localPath = dataUrl || this.filePathToUrl(datPath)
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const isThumb = this.isThumbnailPath(datPath)
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this.emitCacheResolved(payload, cacheKey, localPath)
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return { success: true, localPath, isThumb }
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}
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// 查找已缓存的解密文件
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const existing = this.findCachedOutput(cacheKey, payload.force, payload.sessionId)
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if (existing) {
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const isHd = this.isHdPath(existing)
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// 如果要求高清但找到的是缩略图，继续解密高清图
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if (!(payload.force && !isHd)) {
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this.cacheResolvedPaths(cacheKey, payload.imageMd5, payload.imageDatName, existing)
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const dataUrl = this.fileToDataUrl(existing)
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const localPath = dataUrl || this.filePathToUrl(existing)
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const isThumb = this.isThumbnailPath(existing)
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this.emitCacheResolved(payload, cacheKey, localPath)
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return { success: true, localPath, isThumb }
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}
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}
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const xorKeyRaw = this.configService.get('imageXorKey') as unknown
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// 支持十六进制格式（如 0x53）和十进制格式
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let xorKey: number
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if (typeof xorKeyRaw === 'number') {
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xorKey = xorKeyRaw
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} else {
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const trimmed = String(xorKeyRaw ?? '').trim()
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if (trimmed.toLowerCase().startsWith('0x')) {
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xorKey = parseInt(trimmed, 16)
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} else {
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xorKey = parseInt(trimmed, 10)
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}
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}
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if (Number.isNaN(xorKey) || (!xorKey && xorKey !== 0)) {
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return { success: false, error: '未配置图片解密密钥' }
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}
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const aesKeyRaw = this.configService.get('imageAesKey')
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const aesKey = this.resolveAesKey(aesKeyRaw)
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const decrypted = await this.decryptDatAuto(datPath, xorKey, aesKey)
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const ext = this.detectImageExtension(decrypted) || '.jpg'
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const outputPath = this.getCacheOutputPathFromDat(datPath, ext, payload.sessionId)
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await writeFile(outputPath, decrypted)
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const isThumb = this.isThumbnailPath(datPath)
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this.cacheResolvedPaths(cacheKey, payload.imageMd5, payload.imageDatName, outputPath)
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if (!isThumb) {
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this.clearUpdateFlags(cacheKey, payload.imageMd5, payload.imageDatName)
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}
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const dataUrl = this.bufferToDataUrl(decrypted, ext)
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const localPath = dataUrl || this.filePathToUrl(outputPath)
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this.emitCacheResolved(payload, cacheKey, localPath)
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return { success: true, localPath, isThumb }
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} catch (e) {
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return { success: false, error: String(e) }
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}
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}
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private resolveAccountDir(dbPath: string, wxid: string): string | null {
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const cleanedWxid = this.cleanAccountDirName(wxid)
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const normalized = dbPath.replace(/[\\/]+$/, '')
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const direct = join(normalized, cleanedWxid)
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if (existsSync(direct)) return direct
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if (this.isAccountDir(normalized)) return normalized
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try {
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const entries = readdirSync(normalized)
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const lowerWxid = cleanedWxid.toLowerCase()
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for (const entry of entries) {
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const entryPath = join(normalized, entry)
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if (!this.isDirectory(entryPath)) continue
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const lowerEntry = entry.toLowerCase()
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if (lowerEntry === lowerWxid || lowerEntry.startsWith(`${lowerWxid}_`)) {
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if (this.isAccountDir(entryPath)) return entryPath
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}
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}
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} catch {}
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return null
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}
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/**
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* 获取解密后的缓存目录（用于查找 hardlink.db）
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*/
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private getDecryptedCacheDir(wxid: string): string | null {
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const cachePath = this.configService.get('cachePath')
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if (!cachePath) return null
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const cleanedWxid = this.cleanAccountDirName(wxid)
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const cacheAccountDir = join(cachePath, cleanedWxid)
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// 检查缓存目录下是否有 hardlink.db
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if (existsSync(join(cacheAccountDir, 'hardlink.db'))) {
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return cacheAccountDir
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}
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if (existsSync(join(cachePath, 'hardlink.db'))) {
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return cachePath
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}
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const cacheHardlinkDir = join(cacheAccountDir, 'db_storage', 'hardlink')
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if (existsSync(join(cacheHardlinkDir, 'hardlink.db'))) {
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return cacheHardlinkDir
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}
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return null
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}
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private isAccountDir(dirPath: string): boolean {
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return (
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existsSync(join(dirPath, 'hardlink.db')) ||
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existsSync(join(dirPath, 'db_storage')) ||
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existsSync(join(dirPath, 'FileStorage', 'Image')) ||
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existsSync(join(dirPath, 'FileStorage', 'Image2'))
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)
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}
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private isDirectory(path: string): boolean {
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try {
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return statSync(path).isDirectory()
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} catch {
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return false
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}
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}
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private cleanAccountDirName(dirName: string): string {
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const trimmed = dirName.trim()
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if (!trimmed) return trimmed
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if (trimmed.toLowerCase().startsWith('wxid_')) {
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const match = trimmed.match(/^(wxid_[^_]+)/i)
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if (match) return match[1]
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return trimmed
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}
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const suffixMatch = trimmed.match(/^(.+)_([a-zA-Z0-9]{4})$/)
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if (suffixMatch) return suffixMatch[1]
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return trimmed
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}
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private async resolveDatPath(
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accountDir: string,
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imageMd5?: string,
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imageDatName?: string,
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sessionId?: string,
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options?: { allowThumbnail?: boolean; skipResolvedCache?: boolean }
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): Promise<string | null> {
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const allowThumbnail = options?.allowThumbnail ?? true
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const skipResolvedCache = options?.skipResolvedCache ?? false
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this.logInfo('[ImageDecrypt] resolveDatPath', {
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accountDir,
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imageMd5,
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imageDatName,
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sessionId,
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allowThumbnail,
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skipResolvedCache
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})
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// 优先通过 hardlink.db 查询
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if (imageMd5) {
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this.logInfo('[ImageDecrypt] hardlink lookup (md5)', { imageMd5, sessionId })
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const hardlinkPath = await this.resolveHardlinkPath(accountDir, imageMd5, sessionId)
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if (hardlinkPath) {
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const isThumb = this.isThumbnailPath(hardlinkPath)
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if (allowThumbnail || !isThumb) {
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this.logInfo('[ImageDecrypt] hardlink hit', { imageMd5, path: hardlinkPath })
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this.cacheDatPath(accountDir, imageMd5, hardlinkPath)
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if (imageDatName) this.cacheDatPath(accountDir, imageDatName, hardlinkPath)
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return hardlinkPath
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}
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// hardlink 找到的是缩略图，但要求高清图，直接返回 null，不再搜索
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if (!allowThumbnail && isThumb) {
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return null
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}
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}
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this.logInfo('[ImageDecrypt] hardlink miss (md5)', { imageMd5 })
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if (imageDatName && this.looksLikeMd5(imageDatName) && imageDatName !== imageMd5) {
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this.logInfo('[ImageDecrypt] hardlink fallback (datName)', { imageDatName, sessionId })
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const fallbackPath = await this.resolveHardlinkPath(accountDir, imageDatName, sessionId)
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if (fallbackPath) {
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const isThumb = this.isThumbnailPath(fallbackPath)
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if (allowThumbnail || !isThumb) {
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this.logInfo('[ImageDecrypt] hardlink hit (datName)', { imageMd5: imageDatName, path: fallbackPath })
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this.cacheDatPath(accountDir, imageDatName, fallbackPath)
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return fallbackPath
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}
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if (!allowThumbnail && isThumb) {
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return null
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}
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}
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this.logInfo('[ImageDecrypt] hardlink miss (datName)', { imageDatName })
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}
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}
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if (!imageMd5 && imageDatName && this.looksLikeMd5(imageDatName)) {
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this.logInfo('[ImageDecrypt] hardlink lookup (datName)', { imageDatName, sessionId })
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const hardlinkPath = await this.resolveHardlinkPath(accountDir, imageDatName, sessionId)
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if (hardlinkPath) {
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const isThumb = this.isThumbnailPath(hardlinkPath)
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if (allowThumbnail || !isThumb) {
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this.logInfo('[ImageDecrypt] hardlink hit', { imageMd5: imageDatName, path: hardlinkPath })
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this.cacheDatPath(accountDir, imageDatName, hardlinkPath)
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return hardlinkPath
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}
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// hardlink 找到的是缩略图，但要求高清图，直接返回 null
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if (!allowThumbnail && isThumb) {
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return null
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}
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}
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this.logInfo('[ImageDecrypt] hardlink miss (datName)', { imageDatName })
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}
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// 如果要求高清图但 hardlink 没找到，也不要搜索了（搜索太慢）
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if (!allowThumbnail) {
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return null
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}
|
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if (!imageDatName) return null
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if (!skipResolvedCache) {
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const cached = this.resolvedCache.get(imageDatName)
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if (cached && existsSync(cached)) {
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if (allowThumbnail || !this.isThumbnailPath(cached)) return cached
|
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}
|
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}
|
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const datPath = await this.searchDatFile(accountDir, imageDatName, allowThumbnail)
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if (datPath) {
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this.logInfo('[ImageDecrypt] searchDatFile hit', { imageDatName, path: datPath })
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this.resolvedCache.set(imageDatName, datPath)
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this.cacheDatPath(accountDir, imageDatName, datPath)
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return datPath
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}
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const normalized = this.normalizeDatBase(imageDatName)
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if (normalized !== imageDatName.toLowerCase()) {
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const normalizedPath = await this.searchDatFile(accountDir, normalized, allowThumbnail)
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if (normalizedPath) {
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this.logInfo('[ImageDecrypt] searchDatFile hit (normalized)', { imageDatName, normalized, path: normalizedPath })
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this.resolvedCache.set(imageDatName, normalizedPath)
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this.cacheDatPath(accountDir, imageDatName, normalizedPath)
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return normalizedPath
|
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}
|
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}
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this.logInfo('[ImageDecrypt] resolveDatPath miss', { imageDatName, normalized })
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return null
|
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}
|
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|
||||
private async resolveThumbnailDatPath(
|
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accountDir: string,
|
||||
imageMd5?: string,
|
||||
imageDatName?: string,
|
||||
sessionId?: string
|
||||
): Promise<string | null> {
|
||||
if (imageMd5) {
|
||||
const hardlinkPath = await this.resolveHardlinkPath(accountDir, imageMd5, sessionId)
|
||||
if (hardlinkPath && this.isThumbnailPath(hardlinkPath)) return hardlinkPath
|
||||
}
|
||||
|
||||
if (!imageMd5 && imageDatName && this.looksLikeMd5(imageDatName)) {
|
||||
const hardlinkPath = await this.resolveHardlinkPath(accountDir, imageDatName, sessionId)
|
||||
if (hardlinkPath && this.isThumbnailPath(hardlinkPath)) return hardlinkPath
|
||||
}
|
||||
|
||||
if (!imageDatName) return null
|
||||
return this.searchDatFile(accountDir, imageDatName, true, true)
|
||||
}
|
||||
|
||||
private async checkHasUpdate(
|
||||
payload: { sessionId?: string; imageMd5?: string; imageDatName?: string },
|
||||
cacheKey: string,
|
||||
cachedPath: string
|
||||
): Promise<boolean> {
|
||||
if (!cachedPath || !existsSync(cachedPath)) return false
|
||||
const isThumbnail = this.isThumbnailPath(cachedPath)
|
||||
if (!isThumbnail) return false
|
||||
const wxid = this.configService.get('myWxid')
|
||||
const dbPath = this.configService.get('dbPath')
|
||||
if (!wxid || !dbPath) return false
|
||||
const accountDir = this.resolveAccountDir(dbPath, wxid)
|
||||
if (!accountDir) return false
|
||||
|
||||
const quickDir = this.getCachedDatDir(accountDir, payload.imageDatName, payload.imageMd5)
|
||||
if (quickDir) {
|
||||
const baseName = payload.imageDatName || payload.imageMd5 || cacheKey
|
||||
const candidate = this.findNonThumbnailVariantInDir(quickDir, baseName)
|
||||
if (candidate) {
|
||||
return true
|
||||
}
|
||||
}
|
||||
|
||||
const thumbPath = await this.resolveThumbnailDatPath(
|
||||
accountDir,
|
||||
payload.imageMd5,
|
||||
payload.imageDatName,
|
||||
payload.sessionId
|
||||
)
|
||||
if (thumbPath) {
|
||||
const baseName = payload.imageDatName || payload.imageMd5 || cacheKey
|
||||
const candidate = this.findNonThumbnailVariantInDir(dirname(thumbPath), baseName)
|
||||
if (candidate) {
|
||||
return true
|
||||
}
|
||||
const searchHit = await this.searchDatFileInDir(dirname(thumbPath), baseName, false)
|
||||
if (searchHit && this.isNonThumbnailVariantDat(searchHit)) {
|
||||
return true
|
||||
}
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
private triggerUpdateCheck(
|
||||
payload: { sessionId?: string; imageMd5?: string; imageDatName?: string },
|
||||
cacheKey: string,
|
||||
cachedPath: string
|
||||
): void {
|
||||
if (this.updateFlags.get(cacheKey)) return
|
||||
void this.checkHasUpdate(payload, cacheKey, cachedPath).then((hasUpdate) => {
|
||||
if (!hasUpdate) return
|
||||
this.updateFlags.set(cacheKey, true)
|
||||
this.emitImageUpdate(payload, cacheKey)
|
||||
}).catch(() => {})
|
||||
}
|
||||
|
||||
private looksLikeMd5(value: string): boolean {
|
||||
return /^[a-fA-F0-9]{16,32}$/.test(value)
|
||||
}
|
||||
|
||||
private resolveHardlinkDbPath(accountDir: string): string | null {
|
||||
const wxid = this.configService.get('myWxid')
|
||||
const cacheDir = wxid ? this.getDecryptedCacheDir(wxid) : null
|
||||
const candidates = [
|
||||
join(accountDir, 'db_storage', 'hardlink', 'hardlink.db'),
|
||||
join(accountDir, 'hardlink.db'),
|
||||
cacheDir ? join(cacheDir, 'hardlink.db') : null
|
||||
].filter(Boolean) as string[]
|
||||
this.logInfo('[ImageDecrypt] hardlink db probe', { accountDir, cacheDir, candidates })
|
||||
for (const candidate of candidates) {
|
||||
if (existsSync(candidate)) return candidate
|
||||
}
|
||||
this.logInfo('[ImageDecrypt] hardlink db missing', { accountDir, cacheDir, candidates })
|
||||
return null
|
||||
}
|
||||
|
||||
private async resolveHardlinkPath(accountDir: string, md5: string, _sessionId?: string): Promise<string | null> {
|
||||
try {
|
||||
const hardlinkPath = this.resolveHardlinkDbPath(accountDir)
|
||||
if (!hardlinkPath) {
|
||||
return null
|
||||
}
|
||||
|
||||
const ready = await this.ensureWcdbReady()
|
||||
if (!ready) {
|
||||
this.logInfo('[ImageDecrypt] hardlink db not ready')
|
||||
return null
|
||||
}
|
||||
|
||||
const state = await this.getHardlinkState(accountDir, hardlinkPath)
|
||||
if (!state.imageTable) {
|
||||
this.logInfo('[ImageDecrypt] hardlink table missing', { hardlinkPath })
|
||||
return null
|
||||
}
|
||||
|
||||
const escapedMd5 = this.escapeSqlString(md5)
|
||||
const rowResult = await wcdbService.execQuery(
|
||||
'media',
|
||||
hardlinkPath,
|
||||
`SELECT dir1, dir2, file_name FROM ${state.imageTable} WHERE lower(md5) = lower('${escapedMd5}') LIMIT 1`
|
||||
)
|
||||
const row = rowResult.success && rowResult.rows ? rowResult.rows[0] : null
|
||||
|
||||
if (!row) {
|
||||
this.logInfo('[ImageDecrypt] hardlink row miss', { md5, table: state.imageTable })
|
||||
return null
|
||||
}
|
||||
|
||||
const dir1 = this.getRowValue(row, 'dir1')
|
||||
const dir2 = this.getRowValue(row, 'dir2')
|
||||
const fileName = this.getRowValue(row, 'file_name') ?? this.getRowValue(row, 'fileName')
|
||||
if (dir1 === undefined || dir2 === undefined || !fileName) {
|
||||
this.logInfo('[ImageDecrypt] hardlink row incomplete', { row })
|
||||
return null
|
||||
}
|
||||
|
||||
const lowerFileName = fileName.toLowerCase()
|
||||
if (lowerFileName.endsWith('.dat')) {
|
||||
const baseLower = lowerFileName.slice(0, -4)
|
||||
if (!this.isLikelyImageDatBase(baseLower) && !this.looksLikeMd5(baseLower)) {
|
||||
this.logInfo('[ImageDecrypt] hardlink fileName rejected', { fileName })
|
||||
return null
|
||||
}
|
||||
}
|
||||
|
||||
// dir1 和 dir2 是 rowid，需要从 dir2id 表查询对应的目录名
|
||||
let dir1Name: string | null = null
|
||||
let dir2Name: string | null = null
|
||||
|
||||
if (state.dirTable) {
|
||||
try {
|
||||
// 通过 rowid 查询目录名
|
||||
const dir1Result = await wcdbService.execQuery(
|
||||
'media',
|
||||
hardlinkPath,
|
||||
`SELECT username FROM ${state.dirTable} WHERE rowid = ${Number(dir1)} LIMIT 1`
|
||||
)
|
||||
if (dir1Result.success && dir1Result.rows && dir1Result.rows.length > 0) {
|
||||
const value = this.getRowValue(dir1Result.rows[0], 'username')
|
||||
if (value) dir1Name = String(value)
|
||||
}
|
||||
|
||||
const dir2Result = await wcdbService.execQuery(
|
||||
'media',
|
||||
hardlinkPath,
|
||||
`SELECT username FROM ${state.dirTable} WHERE rowid = ${Number(dir2)} LIMIT 1`
|
||||
)
|
||||
if (dir2Result.success && dir2Result.rows && dir2Result.rows.length > 0) {
|
||||
const value = this.getRowValue(dir2Result.rows[0], 'username')
|
||||
if (value) dir2Name = String(value)
|
||||
}
|
||||
} catch {
|
||||
// ignore
|
||||
}
|
||||
}
|
||||
|
||||
if (!dir1Name || !dir2Name) {
|
||||
this.logInfo('[ImageDecrypt] hardlink dir resolve miss', { dir1, dir2, dir1Name, dir2Name })
|
||||
return null
|
||||
}
|
||||
|
||||
// 构建路径: msg/attach/{dir1Name}/{dir2Name}/Img/{fileName}
|
||||
const possiblePaths = [
|
||||
join(accountDir, 'msg', 'attach', dir1Name, dir2Name, 'Img', fileName),
|
||||
join(accountDir, 'msg', 'attach', dir1Name, dir2Name, 'mg', fileName),
|
||||
join(accountDir, 'msg', 'attach', dir1Name, dir2Name, fileName),
|
||||
]
|
||||
|
||||
for (const fullPath of possiblePaths) {
|
||||
if (existsSync(fullPath)) {
|
||||
this.logInfo('[ImageDecrypt] hardlink path hit', { fullPath })
|
||||
return fullPath
|
||||
}
|
||||
}
|
||||
|
||||
this.logInfo('[ImageDecrypt] hardlink path miss', { possiblePaths })
|
||||
return null
|
||||
} catch {
|
||||
// ignore
|
||||
}
|
||||
return null
|
||||
}
|
||||
|
||||
private async getHardlinkState(accountDir: string, hardlinkPath: string): Promise<HardlinkState> {
|
||||
const cached = this.hardlinkCache.get(hardlinkPath)
|
||||
if (cached) return cached
|
||||
|
||||
const imageResult = await wcdbService.execQuery(
|
||||
'media',
|
||||
hardlinkPath,
|
||||
"SELECT name FROM sqlite_master WHERE type='table' AND name LIKE 'image_hardlink_info%' ORDER BY name DESC LIMIT 1"
|
||||
)
|
||||
const dirResult = await wcdbService.execQuery(
|
||||
'media',
|
||||
hardlinkPath,
|
||||
"SELECT name FROM sqlite_master WHERE type='table' AND name LIKE 'dir2id%' LIMIT 1"
|
||||
)
|
||||
const imageTable = imageResult.success && imageResult.rows && imageResult.rows.length > 0
|
||||
? this.getRowValue(imageResult.rows[0], 'name')
|
||||
: undefined
|
||||
const dirTable = dirResult.success && dirResult.rows && dirResult.rows.length > 0
|
||||
? this.getRowValue(dirResult.rows[0], 'name')
|
||||
: undefined
|
||||
const state: HardlinkState = {
|
||||
imageTable: imageTable ? String(imageTable) : undefined,
|
||||
dirTable: dirTable ? String(dirTable) : undefined
|
||||
}
|
||||
this.logInfo('[ImageDecrypt] hardlink state', { hardlinkPath, imageTable: state.imageTable, dirTable: state.dirTable })
|
||||
this.hardlinkCache.set(hardlinkPath, state)
|
||||
return state
|
||||
}
|
||||
|
||||
private async ensureWcdbReady(): Promise<boolean> {
|
||||
if (wcdbService.isReady()) return true
|
||||
const dbPath = this.configService.get('dbPath')
|
||||
const decryptKey = this.configService.get('decryptKey')
|
||||
const wxid = this.configService.get('myWxid')
|
||||
if (!dbPath || !decryptKey || !wxid) return false
|
||||
const cleanedWxid = this.cleanAccountDirName(wxid)
|
||||
return await wcdbService.open(dbPath, decryptKey, cleanedWxid)
|
||||
}
|
||||
|
||||
private getRowValue(row: any, column: string): any {
|
||||
if (!row) return undefined
|
||||
if (Object.prototype.hasOwnProperty.call(row, column)) return row[column]
|
||||
const target = column.toLowerCase()
|
||||
for (const key of Object.keys(row)) {
|
||||
if (key.toLowerCase() === target) return row[key]
|
||||
}
|
||||
return undefined
|
||||
}
|
||||
|
||||
private escapeSqlString(value: string): string {
|
||||
return value.replace(/'/g, "''")
|
||||
}
|
||||
|
||||
private async searchDatFile(
|
||||
accountDir: string,
|
||||
datName: string,
|
||||
allowThumbnail = true,
|
||||
thumbOnly = false
|
||||
): Promise<string | null> {
|
||||
const key = `${accountDir}|${datName}`
|
||||
const cached = this.resolvedCache.get(key)
|
||||
if (cached && existsSync(cached)) {
|
||||
if (allowThumbnail || !this.isThumbnailPath(cached)) return cached
|
||||
}
|
||||
|
||||
const root = join(accountDir, 'msg', 'attach')
|
||||
if (!existsSync(root)) return null
|
||||
const found = await this.walkForDatInWorker(root, datName.toLowerCase(), 8, allowThumbnail, thumbOnly)
|
||||
if (found) {
|
||||
this.resolvedCache.set(key, found)
|
||||
return found
|
||||
}
|
||||
return null
|
||||
}
|
||||
|
||||
private async searchDatFileInDir(
|
||||
dirPath: string,
|
||||
datName: string,
|
||||
allowThumbnail = true
|
||||
): Promise<string | null> {
|
||||
if (!existsSync(dirPath)) return null
|
||||
return await this.walkForDatInWorker(dirPath, datName.toLowerCase(), 3, allowThumbnail, false)
|
||||
}
|
||||
|
||||
private async walkForDatInWorker(
|
||||
root: string,
|
||||
datName: string,
|
||||
maxDepth = 4,
|
||||
allowThumbnail = true,
|
||||
thumbOnly = false
|
||||
): Promise<string | null> {
|
||||
const workerPath = join(__dirname, 'imageSearchWorker.js')
|
||||
return await new Promise((resolve) => {
|
||||
const worker = new Worker(workerPath, {
|
||||
workerData: { root, datName, maxDepth, allowThumbnail, thumbOnly }
|
||||
})
|
||||
|
||||
const cleanup = () => {
|
||||
worker.removeAllListeners()
|
||||
}
|
||||
|
||||
worker.on('message', (msg: any) => {
|
||||
if (msg && msg.type === 'done') {
|
||||
cleanup()
|
||||
void worker.terminate()
|
||||
resolve(msg.path || null)
|
||||
return
|
||||
}
|
||||
if (msg && msg.type === 'error') {
|
||||
cleanup()
|
||||
void worker.terminate()
|
||||
resolve(null)
|
||||
}
|
||||
})
|
||||
|
||||
worker.on('error', () => {
|
||||
cleanup()
|
||||
void worker.terminate()
|
||||
resolve(null)
|
||||
})
|
||||
})
|
||||
}
|
||||
|
||||
private matchesDatName(fileName: string, datName: string): boolean {
|
||||
const lower = fileName.toLowerCase()
|
||||
const base = lower.endsWith('.dat') ? lower.slice(0, -4) : lower
|
||||
const normalizedBase = this.normalizeDatBase(base)
|
||||
const normalizedTarget = this.normalizeDatBase(datName.toLowerCase())
|
||||
if (normalizedBase === normalizedTarget) return true
|
||||
const pattern = new RegExp(`^${datName}(?:[._][a-z])?\\.dat$`, 'i')
|
||||
if (pattern.test(lower)) return true
|
||||
return lower.endsWith('.dat') && lower.includes(datName)
|
||||
}
|
||||
|
||||
private scoreDatName(fileName: string): number {
|
||||
if (fileName.includes('.t.dat') || fileName.includes('_t.dat')) return 1
|
||||
if (fileName.includes('.c.dat') || fileName.includes('_c.dat')) return 1
|
||||
return 2
|
||||
}
|
||||
|
||||
private isThumbnailDat(fileName: string): boolean {
|
||||
return fileName.includes('.t.dat') || fileName.includes('_t.dat')
|
||||
}
|
||||
|
||||
private hasXVariant(baseLower: string): boolean {
|
||||
return /[._][a-z]$/.test(baseLower)
|
||||
}
|
||||
|
||||
private isThumbnailPath(filePath: string): boolean {
|
||||
const lower = basename(filePath).toLowerCase()
|
||||
if (this.isThumbnailDat(lower)) return true
|
||||
const ext = extname(lower)
|
||||
const base = ext ? lower.slice(0, -ext.length) : lower
|
||||
// 支持新命名 _thumb 和旧命名 _t
|
||||
return base.endsWith('_t') || base.endsWith('_thumb')
|
||||
}
|
||||
|
||||
private isHdPath(filePath: string): boolean {
|
||||
const lower = basename(filePath).toLowerCase()
|
||||
const ext = extname(lower)
|
||||
const base = ext ? lower.slice(0, -ext.length) : lower
|
||||
return base.endsWith('_hd') || base.endsWith('_h')
|
||||
}
|
||||
|
||||
private hasImageVariantSuffix(baseLower: string): boolean {
|
||||
return /[._][a-z]$/.test(baseLower)
|
||||
}
|
||||
|
||||
private isLikelyImageDatBase(baseLower: string): boolean {
|
||||
return this.hasImageVariantSuffix(baseLower) || this.looksLikeMd5(baseLower)
|
||||
}
|
||||
|
||||
private normalizeDatBase(name: string): string {
|
||||
let base = name.toLowerCase()
|
||||
if (base.endsWith('.dat') || base.endsWith('.jpg')) {
|
||||
base = base.slice(0, -4)
|
||||
}
|
||||
while (/[._][a-z]$/.test(base)) {
|
||||
base = base.slice(0, -2)
|
||||
}
|
||||
return base
|
||||
}
|
||||
|
||||
private sanitizeDirName(name: string): string {
|
||||
const trimmed = name.trim()
|
||||
if (!trimmed) return 'unknown'
|
||||
return trimmed.replace(/[<>:"/\\|?*]/g, '_')
|
||||
}
|
||||
|
||||
private resolveTimeDir(datPath: string): string {
|
||||
const parts = datPath.split(/[\\/]+/)
|
||||
for (const part of parts) {
|
||||
if (/^\d{4}-\d{2}$/.test(part)) return part
|
||||
}
|
||||
try {
|
||||
const stat = statSync(datPath)
|
||||
const year = stat.mtime.getFullYear()
|
||||
const month = String(stat.mtime.getMonth() + 1).padStart(2, '0')
|
||||
return `${year}-${month}`
|
||||
} catch {
|
||||
return 'unknown-time'
|
||||
}
|
||||
}
|
||||
|
||||
private findCachedOutput(cacheKey: string, preferHd: boolean = false, sessionId?: string): string | null {
|
||||
const root = this.getCacheRoot()
|
||||
const normalizedKey = this.normalizeDatBase(cacheKey.toLowerCase())
|
||||
const extensions = ['.jpg', '.jpeg', '.png', '.gif', '.webp']
|
||||
|
||||
if (sessionId) {
|
||||
const sessionDir = join(root, this.sanitizeDirName(sessionId))
|
||||
if (existsSync(sessionDir)) {
|
||||
try {
|
||||
const sessionEntries = readdirSync(sessionDir)
|
||||
for (const entry of sessionEntries) {
|
||||
const timeDir = join(sessionDir, entry)
|
||||
if (!this.isDirectory(timeDir)) continue
|
||||
const hit = this.findCachedOutputInDir(timeDir, normalizedKey, extensions, preferHd)
|
||||
if (hit) return hit
|
||||
}
|
||||
} catch {
|
||||
// ignore
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// 新目录结构: Images/{normalizedKey}/{normalizedKey}_thumb.jpg 或 _hd.jpg
|
||||
const imageDir = join(root, normalizedKey)
|
||||
if (existsSync(imageDir)) {
|
||||
const hit = this.findCachedOutputInDir(imageDir, normalizedKey, extensions, preferHd)
|
||||
if (hit) return hit
|
||||
}
|
||||
|
||||
// 兼容旧的平铺结构
|
||||
for (const ext of extensions) {
|
||||
const candidate = join(root, `${cacheKey}${ext}`)
|
||||
if (existsSync(candidate)) return candidate
|
||||
}
|
||||
for (const ext of extensions) {
|
||||
const candidate = join(root, `${cacheKey}_t${ext}`)
|
||||
if (existsSync(candidate)) return candidate
|
||||
}
|
||||
|
||||
return null
|
||||
}
|
||||
|
||||
private findCachedOutputInDir(
|
||||
dirPath: string,
|
||||
normalizedKey: string,
|
||||
extensions: string[],
|
||||
preferHd: boolean
|
||||
): string | null {
|
||||
for (const ext of extensions) {
|
||||
if (preferHd) {
|
||||
const hdPath = join(dirPath, `${normalizedKey}_hd${ext}`)
|
||||
if (existsSync(hdPath)) return hdPath
|
||||
}
|
||||
const thumbPath = join(dirPath, `${normalizedKey}_thumb${ext}`)
|
||||
if (existsSync(thumbPath)) return thumbPath
|
||||
if (!preferHd) {
|
||||
const hdPath = join(dirPath, `${normalizedKey}_hd${ext}`)
|
||||
if (existsSync(hdPath)) return hdPath
|
||||
}
|
||||
}
|
||||
return null
|
||||
}
|
||||
|
||||
private getCacheOutputPathFromDat(datPath: string, ext: string, sessionId?: string): string {
|
||||
const name = basename(datPath)
|
||||
const lower = name.toLowerCase()
|
||||
const base = lower.endsWith('.dat') ? name.slice(0, -4) : name
|
||||
|
||||
// 提取基础名称（去掉 _t, _h 等后缀）
|
||||
const normalizedBase = this.normalizeDatBase(base)
|
||||
|
||||
// 判断是缩略图还是高清图
|
||||
const isThumb = this.isThumbnailDat(lower)
|
||||
const suffix = isThumb ? '_thumb' : '_hd'
|
||||
|
||||
const contactDir = this.sanitizeDirName(sessionId || 'unknown')
|
||||
const timeDir = this.resolveTimeDir(datPath)
|
||||
const outputDir = join(this.getCacheRoot(), contactDir, timeDir)
|
||||
if (!existsSync(outputDir)) {
|
||||
mkdirSync(outputDir, { recursive: true })
|
||||
}
|
||||
|
||||
return join(outputDir, `${normalizedBase}${suffix}${ext}`)
|
||||
}
|
||||
|
||||
private cacheResolvedPaths(cacheKey: string, imageMd5: string | undefined, imageDatName: string | undefined, outputPath: string): void {
|
||||
this.resolvedCache.set(cacheKey, outputPath)
|
||||
if (imageMd5 && imageMd5 !== cacheKey) {
|
||||
this.resolvedCache.set(imageMd5, outputPath)
|
||||
}
|
||||
if (imageDatName && imageDatName !== cacheKey && imageDatName !== imageMd5) {
|
||||
this.resolvedCache.set(imageDatName, outputPath)
|
||||
}
|
||||
}
|
||||
|
||||
private getCacheKeys(payload: { imageMd5?: string; imageDatName?: string }): string[] {
|
||||
const keys: string[] = []
|
||||
const addKey = (value?: string) => {
|
||||
if (!value) return
|
||||
const lower = value.toLowerCase()
|
||||
if (!keys.includes(value)) keys.push(value)
|
||||
if (!keys.includes(lower)) keys.push(lower)
|
||||
const normalized = this.normalizeDatBase(lower)
|
||||
if (normalized && !keys.includes(normalized)) keys.push(normalized)
|
||||
}
|
||||
addKey(payload.imageMd5)
|
||||
if (payload.imageDatName && payload.imageDatName !== payload.imageMd5) {
|
||||
addKey(payload.imageDatName)
|
||||
}
|
||||
return keys
|
||||
}
|
||||
|
||||
private cacheDatPath(accountDir: string, datName: string, datPath: string): void {
|
||||
const key = `${accountDir}|${datName}`
|
||||
this.resolvedCache.set(key, datPath)
|
||||
const normalized = this.normalizeDatBase(datName)
|
||||
if (normalized && normalized !== datName.toLowerCase()) {
|
||||
this.resolvedCache.set(`${accountDir}|${normalized}`, datPath)
|
||||
}
|
||||
}
|
||||
|
||||
private clearUpdateFlags(cacheKey: string, imageMd5?: string, imageDatName?: string): void {
|
||||
this.updateFlags.delete(cacheKey)
|
||||
if (imageMd5) this.updateFlags.delete(imageMd5)
|
||||
if (imageDatName) this.updateFlags.delete(imageDatName)
|
||||
}
|
||||
|
||||
private getCachedDatDir(accountDir: string, imageDatName?: string, imageMd5?: string): string | null {
|
||||
const keys = [
|
||||
imageDatName ? `${accountDir}|${imageDatName}` : null,
|
||||
imageDatName ? `${accountDir}|${this.normalizeDatBase(imageDatName)}` : null,
|
||||
imageMd5 ? `${accountDir}|${imageMd5}` : null
|
||||
].filter(Boolean) as string[]
|
||||
for (const key of keys) {
|
||||
const cached = this.resolvedCache.get(key)
|
||||
if (cached && existsSync(cached)) return dirname(cached)
|
||||
}
|
||||
return null
|
||||
}
|
||||
|
||||
private findNonThumbnailVariantInDir(dirPath: string, baseName: string): string | null {
|
||||
let entries: string[]
|
||||
try {
|
||||
entries = readdirSync(dirPath)
|
||||
} catch {
|
||||
return null
|
||||
}
|
||||
const target = this.normalizeDatBase(baseName.toLowerCase())
|
||||
for (const entry of entries) {
|
||||
const lower = entry.toLowerCase()
|
||||
if (!lower.endsWith('.dat')) continue
|
||||
if (this.isThumbnailDat(lower)) continue
|
||||
if (!this.hasXVariant(lower.slice(0, -4))) continue
|
||||
const baseLower = lower.slice(0, -4)
|
||||
if (this.normalizeDatBase(baseLower) !== target) continue
|
||||
return join(dirPath, entry)
|
||||
}
|
||||
return null
|
||||
}
|
||||
|
||||
private isNonThumbnailVariantDat(datPath: string): boolean {
|
||||
const lower = basename(datPath).toLowerCase()
|
||||
if (!lower.endsWith('.dat')) return false
|
||||
if (this.isThumbnailDat(lower)) return false
|
||||
const baseLower = lower.slice(0, -4)
|
||||
return this.hasXVariant(baseLower)
|
||||
}
|
||||
|
||||
private emitImageUpdate(payload: { sessionId?: string; imageMd5?: string; imageDatName?: string }, cacheKey: string): void {
|
||||
const message = { cacheKey, imageMd5: payload.imageMd5, imageDatName: payload.imageDatName }
|
||||
for (const win of BrowserWindow.getAllWindows()) {
|
||||
if (!win.isDestroyed()) {
|
||||
win.webContents.send('image:updateAvailable', message)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private emitCacheResolved(payload: { sessionId?: string; imageMd5?: string; imageDatName?: string }, cacheKey: string, localPath: string): void {
|
||||
const message = { cacheKey, imageMd5: payload.imageMd5, imageDatName: payload.imageDatName, localPath }
|
||||
for (const win of BrowserWindow.getAllWindows()) {
|
||||
if (!win.isDestroyed()) {
|
||||
win.webContents.send('image:cacheResolved', message)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private async ensureCacheIndexed(): Promise<void> {
|
||||
if (this.cacheIndexed) return
|
||||
if (this.cacheIndexing) return this.cacheIndexing
|
||||
this.cacheIndexing = new Promise((resolve) => {
|
||||
const root = this.getCacheRoot()
|
||||
try {
|
||||
this.indexCacheDir(root, 2, 0)
|
||||
} catch {
|
||||
this.cacheIndexed = true
|
||||
this.cacheIndexing = null
|
||||
resolve()
|
||||
return
|
||||
}
|
||||
this.cacheIndexed = true
|
||||
this.cacheIndexing = null
|
||||
resolve()
|
||||
})
|
||||
return this.cacheIndexing
|
||||
}
|
||||
|
||||
private indexCacheDir(root: string, maxDepth: number, depth: number): void {
|
||||
let entries: string[]
|
||||
try {
|
||||
entries = readdirSync(root)
|
||||
} catch {
|
||||
return
|
||||
}
|
||||
const extensions = ['.jpg', '.jpeg', '.png', '.gif', '.webp']
|
||||
for (const entry of entries) {
|
||||
const fullPath = join(root, entry)
|
||||
let stat: ReturnType<typeof statSync>
|
||||
try {
|
||||
stat = statSync(fullPath)
|
||||
} catch {
|
||||
continue
|
||||
}
|
||||
if (stat.isDirectory()) {
|
||||
if (depth < maxDepth) {
|
||||
this.indexCacheDir(fullPath, maxDepth, depth + 1)
|
||||
}
|
||||
continue
|
||||
}
|
||||
if (!stat.isFile()) continue
|
||||
const lower = entry.toLowerCase()
|
||||
const ext = extensions.find((item) => lower.endsWith(item))
|
||||
if (!ext) continue
|
||||
const base = entry.slice(0, -ext.length)
|
||||
this.addCacheIndex(base, fullPath)
|
||||
const normalized = this.normalizeDatBase(base)
|
||||
if (normalized && normalized !== base.toLowerCase()) {
|
||||
this.addCacheIndex(normalized, fullPath)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
private addCacheIndex(key: string, path: string): void {
|
||||
const normalizedKey = key.toLowerCase()
|
||||
const existing = this.resolvedCache.get(normalizedKey)
|
||||
if (existing) {
|
||||
const existingIsThumb = this.isThumbnailPath(existing)
|
||||
const candidateIsThumb = this.isThumbnailPath(path)
|
||||
if (!existingIsThumb && candidateIsThumb) return
|
||||
}
|
||||
this.resolvedCache.set(normalizedKey, path)
|
||||
}
|
||||
|
||||
private getCacheRoot(): string {
|
||||
const configured = this.configService.get('cachePath')
|
||||
const root = configured
|
||||
? join(configured, 'Images')
|
||||
: join(app.getPath('documents'), 'WeFlow', 'Images')
|
||||
if (!existsSync(root)) {
|
||||
mkdirSync(root, { recursive: true })
|
||||
}
|
||||
return root
|
||||
}
|
||||
|
||||
private resolveAesKey(aesKeyRaw: string): Buffer | null {
|
||||
const trimmed = aesKeyRaw?.trim() ?? ''
|
||||
if (!trimmed) return null
|
||||
return this.asciiKey16(trimmed)
|
||||
}
|
||||
|
||||
private async decryptDatAuto(datPath: string, xorKey: number, aesKey: Buffer | null): Promise<Buffer> {
|
||||
const version = this.getDatVersion(datPath)
|
||||
|
||||
if (version === 0) {
|
||||
return this.decryptDatV3(datPath, xorKey)
|
||||
}
|
||||
if (version === 1) {
|
||||
const key = this.asciiKey16(this.defaultV1AesKey)
|
||||
return this.decryptDatV4(datPath, xorKey, key)
|
||||
}
|
||||
// version === 2
|
||||
if (!aesKey || aesKey.length !== 16) {
|
||||
throw new Error('请到设置配置图片解密密钥')
|
||||
}
|
||||
return this.decryptDatV4(datPath, xorKey, aesKey)
|
||||
}
|
||||
|
||||
private getDatVersion(inputPath: string): number {
|
||||
if (!existsSync(inputPath)) {
|
||||
throw new Error('文件不存在')
|
||||
}
|
||||
const bytes = readFileSync(inputPath)
|
||||
if (bytes.length < 6) {
|
||||
return 0
|
||||
}
|
||||
const signature = bytes.subarray(0, 6)
|
||||
if (this.compareBytes(signature, Buffer.from([0x07, 0x08, 0x56, 0x31, 0x08, 0x07]))) {
|
||||
return 1
|
||||
}
|
||||
if (this.compareBytes(signature, Buffer.from([0x07, 0x08, 0x56, 0x32, 0x08, 0x07]))) {
|
||||
return 2
|
||||
}
|
||||
return 0
|
||||
}
|
||||
|
||||
private decryptDatV3(inputPath: string, xorKey: number): Buffer {
|
||||
const data = readFileSync(inputPath)
|
||||
const out = Buffer.alloc(data.length)
|
||||
for (let i = 0; i < data.length; i += 1) {
|
||||
out[i] = data[i] ^ xorKey
|
||||
}
|
||||
return out
|
||||
}
|
||||
|
||||
private decryptDatV4(inputPath: string, xorKey: number, aesKey: Buffer): Buffer {
|
||||
const bytes = readFileSync(inputPath)
|
||||
if (bytes.length < 0x0f) {
|
||||
throw new Error('文件太小，无法解析')
|
||||
}
|
||||
|
||||
const header = bytes.subarray(0, 0x0f)
|
||||
const data = bytes.subarray(0x0f)
|
||||
const aesSize = this.bytesToInt32(header.subarray(6, 10))
|
||||
const xorSize = this.bytesToInt32(header.subarray(10, 14))
|
||||
|
||||
// AES 数据需要对齐到 16 字节（PKCS7 填充）
|
||||
// 当 aesSize % 16 === 0 时，仍需要额外 16 字节的填充
|
||||
const remainder = ((aesSize % 16) + 16) % 16
|
||||
const alignedAesSize = aesSize + (16 - remainder)
|
||||
|
||||
if (alignedAesSize > data.length) {
|
||||
throw new Error('文件格式异常：AES 数据长度超过文件实际长度')
|
||||
}
|
||||
|
||||
const aesData = data.subarray(0, alignedAesSize)
|
||||
let unpadded: Buffer = Buffer.alloc(0)
|
||||
if (aesData.length > 0) {
|
||||
const decipher = crypto.createDecipheriv('aes-128-ecb', aesKey, null)
|
||||
decipher.setAutoPadding(false)
|
||||
const decrypted = Buffer.concat([decipher.update(aesData), decipher.final()])
|
||||
|
||||
// 使用 PKCS7 填充移除
|
||||
unpadded = this.strictRemovePadding(decrypted)
|
||||
}
|
||||
|
||||
const remaining = data.subarray(alignedAesSize)
|
||||
if (xorSize < 0 || xorSize > remaining.length) {
|
||||
throw new Error('文件格式异常：XOR 数据长度不合法')
|
||||
}
|
||||
|
||||
let rawData = Buffer.alloc(0)
|
||||
let xoredData = Buffer.alloc(0)
|
||||
if (xorSize > 0) {
|
||||
const rawLength = remaining.length - xorSize
|
||||
if (rawLength < 0) {
|
||||
throw new Error('文件格式异常：原始数据长度小于XOR长度')
|
||||
}
|
||||
rawData = remaining.subarray(0, rawLength)
|
||||
const xorData = remaining.subarray(rawLength)
|
||||
xoredData = Buffer.alloc(xorData.length)
|
||||
for (let i = 0; i < xorData.length; i += 1) {
|
||||
xoredData[i] = xorData[i] ^ xorKey
|
||||
}
|
||||
} else {
|
||||
rawData = remaining
|
||||
xoredData = Buffer.alloc(0)
|
||||
}
|
||||
|
||||
return Buffer.concat([unpadded, rawData, xoredData])
|
||||
}
|
||||
|
||||
private bytesToInt32(bytes: Buffer): number {
|
||||
if (bytes.length !== 4) {
|
||||
throw new Error('需要4个字节')
|
||||
}
|
||||
return bytes[0] | (bytes[1] << 8) | (bytes[2] << 16) | (bytes[3] << 24)
|
||||
}
|
||||
|
||||
asciiKey16(keyString: string): Buffer {
|
||||
if (keyString.length < 16) {
|
||||
throw new Error('AES密钥至少需要16个字符')
|
||||
}
|
||||
return Buffer.from(keyString, 'ascii').subarray(0, 16)
|
||||
}
|
||||
|
||||
private strictRemovePadding(data: Buffer): Buffer {
|
||||
if (!data.length) {
|
||||
throw new Error('解密结果为空，填充非法')
|
||||
}
|
||||
const paddingLength = data[data.length - 1]
|
||||
if (paddingLength === 0 || paddingLength > 16 || paddingLength > data.length) {
|
||||
throw new Error('PKCS7 填充长度非法')
|
||||
}
|
||||
for (let i = data.length - paddingLength; i < data.length; i += 1) {
|
||||
if (data[i] !== paddingLength) {
|
||||
throw new Error('PKCS7 填充内容非法')
|
||||
}
|
||||
}
|
||||
return data.subarray(0, data.length - paddingLength)
|
||||
}
|
||||
|
||||
private detectImageExtension(buffer: Buffer): string | null {
|
||||
if (buffer.length < 12) return null
|
||||
if (buffer[0] === 0x47 && buffer[1] === 0x49 && buffer[2] === 0x46) return '.gif'
|
||||
if (buffer[0] === 0x89 && buffer[1] === 0x50 && buffer[2] === 0x4e && buffer[3] === 0x47) return '.png'
|
||||
if (buffer[0] === 0xff && buffer[1] === 0xd8 && buffer[2] === 0xff) return '.jpg'
|
||||
if (buffer[0] === 0x52 && buffer[1] === 0x49 && buffer[2] === 0x46 && buffer[3] === 0x46 &&
|
||||
buffer[8] === 0x57 && buffer[9] === 0x45 && buffer[10] === 0x42 && buffer[11] === 0x50) {
|
||||
return '.webp'
|
||||
}
|
||||
return null
|
||||
}
|
||||
|
||||
private bufferToDataUrl(buffer: Buffer, ext: string): string | null {
|
||||
const mimeType = this.mimeFromExtension(ext)
|
||||
if (!mimeType) return null
|
||||
return `data:${mimeType};base64,${buffer.toString('base64')}`
|
||||
}
|
||||
|
||||
private fileToDataUrl(filePath: string): string | null {
|
||||
try {
|
||||
const ext = extname(filePath).toLowerCase()
|
||||
const mimeType = this.mimeFromExtension(ext)
|
||||
if (!mimeType) return null
|
||||
const data = readFileSync(filePath)
|
||||
return `data:${mimeType};base64,${data.toString('base64')}`
|
||||
} catch {
|
||||
return null
|
||||
}
|
||||
}
|
||||
|
||||
private mimeFromExtension(ext: string): string | null {
|
||||
switch (ext.toLowerCase()) {
|
||||
case '.gif':
|
||||
return 'image/gif'
|
||||
case '.png':
|
||||
return 'image/png'
|
||||
case '.jpg':
|
||||
case '.jpeg':
|
||||
return 'image/jpeg'
|
||||
case '.webp':
|
||||
return 'image/webp'
|
||||
default:
|
||||
return null
|
||||
}
|
||||
}
|
||||
|
||||
private filePathToUrl(filePath: string): string {
|
||||
const url = pathToFileURL(filePath).toString()
|
||||
try {
|
||||
const mtime = statSync(filePath).mtimeMs
|
||||
return `${url}?v=${Math.floor(mtime)}`
|
||||
} catch {
|
||||
return url
|
||||
}
|
||||
}
|
||||
|
||||
private isImageFile(filePath: string): boolean {
|
||||
const ext = extname(filePath).toLowerCase()
|
||||
return ext === '.gif' || ext === '.png' || ext === '.jpg' || ext === '.jpeg' || ext === '.webp'
|
||||
}
|
||||
|
||||
private compareBytes(a: Buffer, b: Buffer): boolean {
|
||||
if (a.length !== b.length) return false
|
||||
for (let i = 0; i < a.length; i += 1) {
|
||||
if (a[i] !== b[i]) return false
|
||||
}
|
||||
return true
|
||||
}
|
||||
|
||||
// 保留原有的批量检测 XOR 密钥方法（用于兼容）
|
||||
async batchDetectXorKey(dirPath: string, maxFiles: number = 100): Promise<number | null> {
|
||||
const keyCount: Map<number, number> = new Map()
|
||||
let filesChecked = 0
|
||||
|
||||
const V1_SIGNATURE = Buffer.from([0x07, 0x08, 0x56, 0x31, 0x08, 0x07])
|
||||
const V2_SIGNATURE = Buffer.from([0x07, 0x08, 0x56, 0x32, 0x08, 0x07])
|
||||
const IMAGE_SIGNATURES: { [key: string]: Buffer } = {
|
||||
jpg: Buffer.from([0xFF, 0xD8, 0xFF]),
|
||||
png: Buffer.from([0x89, 0x50, 0x4E, 0x47]),
|
||||
gif: Buffer.from([0x47, 0x49, 0x46, 0x38]),
|
||||
bmp: Buffer.from([0x42, 0x4D]),
|
||||
webp: Buffer.from([0x52, 0x49, 0x46, 0x46])
|
||||
}
|
||||
|
||||
const detectXorKeyFromV3 = (header: Buffer): number | null => {
|
||||
for (const [, signature] of Object.entries(IMAGE_SIGNATURES)) {
|
||||
const xorKey = header[0] ^ signature[0]
|
||||
let valid = true
|
||||
for (let i = 0; i < signature.length && i < header.length; i++) {
|
||||
if ((header[i] ^ xorKey) !== signature[i]) {
|
||||
valid = false
|
||||
break
|
||||
}
|
||||
}
|
||||
if (valid) return xorKey
|
||||
}
|
||||
return null
|
||||
}
|
||||
|
||||
const scanDir = (dir: string) => {
|
||||
if (filesChecked >= maxFiles) return
|
||||
try {
|
||||
const entries = readdirSync(dir, { withFileTypes: true })
|
||||
for (const entry of entries) {
|
||||
if (filesChecked >= maxFiles) return
|
||||
const fullPath = join(dir, entry.name)
|
||||
if (entry.isDirectory()) {
|
||||
scanDir(fullPath)
|
||||
} else if (entry.name.endsWith('.dat')) {
|
||||
try {
|
||||
const header = Buffer.alloc(16)
|
||||
const fd = require('fs').openSync(fullPath, 'r')
|
||||
require('fs').readSync(fd, header, 0, 16, 0)
|
||||
require('fs').closeSync(fd)
|
||||
|
||||
if (header.subarray(0, 6).equals(V1_SIGNATURE) || header.subarray(0, 6).equals(V2_SIGNATURE)) {
|
||||
continue
|
||||
}
|
||||
|
||||
const key = detectXorKeyFromV3(header)
|
||||
if (key !== null) {
|
||||
keyCount.set(key, (keyCount.get(key) || 0) + 1)
|
||||
filesChecked++
|
||||
}
|
||||
} catch {}
|
||||
}
|
||||
}
|
||||
} catch {}
|
||||
}
|
||||
|
||||
scanDir(dirPath)
|
||||
|
||||
if (keyCount.size === 0) return null
|
||||
|
||||
let maxCount = 0
|
||||
let mostCommonKey: number | null = null
|
||||
keyCount.forEach((count, key) => {
|
||||
if (count > maxCount) {
|
||||
maxCount = count
|
||||
mostCommonKey = key
|
||||
}
|
||||
})
|
||||
|
||||
return mostCommonKey
|
||||
}
|
||||
|
||||
// 保留原有的解密到文件方法（用于兼容）
|
||||
async decryptToFile(inputPath: string, outputPath: string, xorKey: number, aesKey?: Buffer): Promise<void> {
|
||||
const version = this.getDatVersion(inputPath)
|
||||
let decrypted: Buffer
|
||||
|
||||
if (version === 0) {
|
||||
decrypted = this.decryptDatV3(inputPath, xorKey)
|
||||
} else if (version === 1) {
|
||||
const key = this.asciiKey16(this.defaultV1AesKey)
|
||||
decrypted = this.decryptDatV4(inputPath, xorKey, key)
|
||||
} else {
|
||||
if (!aesKey || aesKey.length !== 16) {
|
||||
throw new Error('V4版本需要16字节AES密钥')
|
||||
}
|
||||
decrypted = this.decryptDatV4(inputPath, xorKey, aesKey)
|
||||
}
|
||||
|
||||
const outputDir = dirname(outputPath)
|
||||
if (!existsSync(outputDir)) {
|
||||
mkdirSync(outputDir, { recursive: true })
|
||||
}
|
||||
|
||||
await writeFile(outputPath, decrypted)
|
||||
}
|
||||
}
|
||||
|
||||
export const imageDecryptService = new ImageDecryptService()
|
||||
Reference in new issue
Block a user