IU: descramble images (#14917)
* iu: descramble images * bump overrideversioncode * add comments * merge iu_descramble and args * docs * make all Fs lowercase * fix according to suggestions * rename a bit
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beerpsi
GitHub
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d8fef95969
@ -1,7 +1,201 @@
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package eu.kanade.tachiyomi.extension.en.immortalupdates
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import android.graphics.Bitmap
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import android.graphics.BitmapFactory
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import android.graphics.Canvas
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import android.graphics.Color
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import android.graphics.ColorMatrix
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import android.graphics.ColorMatrixColorFilter
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import android.graphics.Paint
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import android.graphics.Rect
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import app.cash.quickjs.QuickJs
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import eu.kanade.tachiyomi.multisrc.madara.Madara
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import eu.kanade.tachiyomi.network.GET
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import eu.kanade.tachiyomi.source.model.Page
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import okhttp3.HttpUrl.Companion.toHttpUrl
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import okhttp3.MediaType.Companion.toMediaTypeOrNull
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import okhttp3.ResponseBody.Companion.toResponseBody
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import org.jsoup.nodes.Document
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import java.io.ByteArrayOutputStream
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import java.io.InputStream
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class ImmortalUpdates : Madara("Immortal Updates", "https://immortalupdates.com", "en") {
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override val useNewChapterEndpoint: Boolean = true
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override val client = super.client.newBuilder().addInterceptor { chain ->
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val response = chain.proceed(chain.request())
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val args = response.request.url.queryParameter("iu_descramble")
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?.split(",")
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?: return@addInterceptor response
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val image = unscrambleImage(response.body!!.byteStream(), args)
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val body = image.toResponseBody("image/jpeg".toMediaTypeOrNull())
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return@addInterceptor response.newBuilder()
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.body(body)
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.build()
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}.build()
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override fun pageListParse(document: Document): List<Page> {
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val pageList = super.pageListParse(document).toMutableList()
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val unscramblingCallsPage = pageList.firstOrNull { it.imageUrl!!.contains("00-call") }
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?: return pageList
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val unscramblingCalls = client.newCall(GET(unscramblingCallsPage.imageUrl!!, headers))
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.execute()
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.use { it.body!!.string() }
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unscramblingCalls.replace("\r", "").split("\n").forEach {
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val args = unfuckJs(it)
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.substringAfter("(")
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.substringBefore(")")
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val filenameFragment = args.split(",")[0].removeSurrounding("'")
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val page = pageList.firstOrNull { it.imageUrl!!.contains(filenameFragment, ignoreCase = true) }
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?: return@forEach
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val newPageUrl = page.imageUrl!!.toHttpUrl().newBuilder()
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.addQueryParameter("iu_descramble", args)
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.build().toString()
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pageList[page.index] = Page(page.index, document.location(), newPageUrl)
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}
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pageList.remove(unscramblingCallsPage)
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return pageList
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}
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// Converted from _0x3bc005: Find the CanvasRenderingContext2D.drawImage call basically
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//
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// `args` is the arguments of the original get_img call:
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// get_img(file_to_match, indexer, iterations, sectionWidth, sectionHeight, isBackgroundBlack, shouldFillColor, ???, key, keyAddition, ???)
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//
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// The boolean after shouldFillColor seems to always be `false` so I have optimized it out for now.
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// If it fucks up someone will make an issue anyways /shrug
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//
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// I assumed the last argument was to check if versions match or something (since it was 1.0.1)
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// but it was used in some canvas thingy that I didn't bother to check
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private fun unscrambleImage(image: InputStream, args: List<String>): ByteArray {
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val indexer = args[1].toInt()
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val iterations = args[2].toInt()
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val sectionWidth = args[3].toInt()
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val sectionHeight = args[4].toInt()
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val isBackgroundBlack = args[5] == "true"
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val shouldFillColor = args[6] == "true"
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val key = args[8].toInt()
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val keyAddition = args[9].toInt()
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val bitmap = BitmapFactory.decodeStream(image)
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val result = Bitmap.createBitmap(bitmap.width, bitmap.height, Bitmap.Config.ARGB_8888)
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val canvas = Canvas(result)
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val heightSectionCount = bitmap.height / sectionHeight
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val widthSectionCount = bitmap.width / sectionWidth
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val sectionCount = heightSectionCount * widthSectionCount
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val descramblingArray = createDescramblingArray(indexer, sectionCount, key, keyAddition, iterations)
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if (shouldFillColor) {
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val backgroundColor = if (isBackgroundBlack) Color.BLACK else Color.WHITE
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canvas.drawColor(backgroundColor)
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}
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var i = 0
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for (vertical in 0 until heightSectionCount) {
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for (horizontal in 0 until widthSectionCount) {
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val swap = descramblingArray[i]
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val baseHeight = swap.floorDiv(widthSectionCount)
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val baseWidth = swap - baseHeight * widthSectionCount
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val dx = baseWidth * sectionWidth
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val dy = baseHeight * sectionHeight
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val sx = horizontal * sectionWidth
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val sy = vertical * sectionHeight
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val srcRect = Rect(sx, sy, sx + sectionWidth, sy + sectionHeight)
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val dstRect = Rect(dx, dy, dx + sectionWidth, dy + sectionHeight)
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canvas.drawBitmap(bitmap, srcRect, dstRect, null)
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i += 1
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}
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}
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val invertingPaint = Paint().apply {
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colorFilter = ColorMatrixColorFilter(
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ColorMatrix(
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floatArrayOf(
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-1.0f, 0.0f, 0.0f, 0.0f, 255.0f,
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0.0f, -1.0f, 0.0f, 0.0f, 255.0f,
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0.0f, 0.0f, -1.0f, 0.0f, 255.0f,
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0.0f, 0.0f, 0.0f, 1.0f, 0.0f
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)
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)
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)
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}
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canvas.drawBitmap(result, 0f, 0f, invertingPaint)
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val output = ByteArrayOutputStream()
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result.compress(Bitmap.CompressFormat.JPEG, 90, output)
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return output.toByteArray()
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}
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// Converted from _0x144afb
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// This should be called a little bit before the drawImage calls
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private fun createDescramblingArray(indexer: Int, size: Int, key: Int, keyAddition: Int, iterations: Int = 2): List<Int> {
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var indexerMut = indexer
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val returnArray = mutableListOf<Int>()
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for (i in 0 until size) {
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returnArray.add(i)
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}
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for (i in 0 until size) {
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for (o in 0 until iterations) {
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indexerMut = (indexerMut * key + keyAddition) % size
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val tmp = returnArray[indexerMut]
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returnArray[indexerMut] = returnArray[i]
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returnArray[i] = tmp
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}
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}
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return returnArray
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}
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private fun unfuckJs(jsf: String): String {
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// String: ([]+[])
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// fontcolor: (![]+[])[+[]]+({}+[])[+!![]]+([][[]]+[])[+!![]]+(!![]+[])[+[]]+({}+[])[!![]+!![]+!![]+!![]+!![]]+({}+[])[+!![]]+(![]+[])[!![]+!![]]+({}+[])[+!![]]+(!![]+[])[+!![]]
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// "undefined": []+[][[]]
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// Quick hack so QuickJS doesn't complain about function being called with no args
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val input = jsf.replace(
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"([]+[])[(![]+[])[+[]]+({}+[])[+!![]]+([][[]]+[])[+!![]]+(!![]+[])[+[]]+({}+[])[!![]+!![]+!![]+!![]+!![]]+({}+[])[+!![]]+(![]+[])[!![]+!![]]+({}+[])[+!![]]+(!![]+[])[+!![]]]()",
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"([]+[])[(![]+[])[+[]]+({}+[])[+!![]]+([][[]]+[])[+!![]]+(!![]+[])[+[]]+({}+[])[!![]+!![]+!![]+!![]+!![]]+({}+[])[+!![]]+(![]+[])[!![]+!![]]+({}+[])[+!![]]+(!![]+[])[+!![]]]([]+[][[]])",
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)
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return QuickJs.create().use {
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it.execute(jsfBoilerplate)
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it.evaluate(input.removePrefix("[]").removeSuffix("()") + "[0]").toString()
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}
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}
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private val jsfBoilerplate: ByteArray by lazy {
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QuickJs.create().use {
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it.compile(
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"""
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class Location {
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constructor(href) {
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this.href = href
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}
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toString() {
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return this.href
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}
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}
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this.location = new Location("https://");
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""".trimIndent(),
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"?"
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)
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}
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}
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}
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@ -148,7 +148,7 @@ class MadaraGenerator : ThemeSourceGenerator {
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SingleLang("Ichirin No Hana Yuri", "https://ichirinnohanayuriscan.com", "pt-BR", isNsfw = true, overrideVersionCode = 4),
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SingleLang("Ikifeng", "https://ikifeng.com", "es", isNsfw = true),
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SingleLang("Illusion Scan", "https://illusionscan.com", "pt-BR", isNsfw = true),
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SingleLang("Immortal Updates", "https://immortalupdates.com", "en", overrideVersionCode = 2),
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SingleLang("Immortal Updates", "https://immortalupdates.com", "en", overrideVersionCode = 3),
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SingleLang("Império Scans", "https://imperioscans.com.br", "pt-BR", className = "ImperioScans", overrideVersionCode = 1),
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SingleLang("Inazu Manga", "https://inazumanga.com", "id", isNsfw = true),
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SingleLang("InfraFandub", "https://infrafandub.xyz", "es"),
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