MirrorDesu: change domain and decrypt pagelist (#1738)

src/id/mirrordesu/build.gradle

@@ -2,9 +2,14 @@ ext {
     extName = 'MirrorDesu'
     extClass = '.MirrorDesu'
     themePkg = 'mangathemesia'
-    baseUrl = 'https://mirrordesu.me'
-    overrideVersionCode = 0
+    baseUrl = 'https://mirrordesu.one'
+    overrideVersionCode = 1
     isNsfw = true
 }
 
 apply from: "$rootDir/common.gradle"
+
+dependencies {
+    implementation(project(":lib:cryptoaes"))
+    implementation(project(":lib:synchrony"))
+}

src/id/mirrordesu/src/eu/kanade/tachiyomi/extension/id/mirrordesu/MirrorDesu.kt

@@ -1,13 +1,81 @@
 package eu.kanade.tachiyomi.extension.id.mirrordesu
 
+import android.util.Base64
+import eu.kanade.tachiyomi.lib.cryptoaes.CryptoAES
+import eu.kanade.tachiyomi.lib.synchrony.Deobfuscator
 import eu.kanade.tachiyomi.multisrc.mangathemesia.MangaThemesia
 import eu.kanade.tachiyomi.network.interceptor.rateLimit
-import okhttp3.OkHttpClient
+import eu.kanade.tachiyomi.source.model.Page
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+import kotlinx.serialization.decodeFromString
+import org.jsoup.nodes.Document
 
-class MirrorDesu : MangaThemesia("MirrorDesu", "https://mirrordesu.me", "id", "/komik") {
-    override val client: OkHttpClient = super.client.newBuilder()
+class MirrorDesu : MangaThemesia(
+    "MirrorDesu",
+    "https://mirrordesu.one",
+    "id",
+    "/komik",
+) {
+    override val client = super.client.newBuilder()
         .rateLimit(4)
         .build()
 
     override val hasProjectPage = true
+
+    override fun pageListParse(document: Document): List<Page> {
+        val script = document.selectFirst("script:containsData(ts_reader)")?.data()
+            ?: return super.pageListParse(document)
+
+        val deobfuscatedScript = Deobfuscator.deobfuscateScript(script)!!
+
+        val (dataKey, pwdKey) = obfuscatedNamesRegex.find(deobfuscatedScript)!!
+            .groupValues.let { it[1] to it[2] }
+
+        val encData = deobfuscatedScript.substringAfter(dataKey)
+            .substringAfter("\'")
+            .substringBefore("\'")
+            .let { json.decodeFromString<EncryptedDto>(it) }
+
+        val unsaltedCiphertext = Base64.decode(encData.cipherText, Base64.DEFAULT)
+        val salt = encData.salt.decodeHex()
+        val ciphertext = Base64.encodeToString(salted + salt + unsaltedCiphertext, Base64.DEFAULT)
+
+        val pwd = Regex("""let\s*$pwdKey\s*=\s*'(\w+)'""").find(deobfuscatedScript)!!
+            .groupValues[1]
+
+        val data = CryptoAES.decrypt(ciphertext, pwd)
+
+        val tsReader = json.decodeFromString<TSReader>(json.decodeFromString<String>(data))
+        val imageUrls = tsReader.sources.firstOrNull()?.images ?: return emptyList()
+        return imageUrls.mapIndexed { index, imageUrl -> Page(index, document.location(), imageUrl) }
+    }
+
+    private fun String.decodeHex(): ByteArray {
+        check(length % 2 == 0) { "Must have an even length" }
+
+        return chunked(2)
+            .map { it.toInt(16).toByte() }
+            .toByteArray()
+    }
+
+    private val salted = "Salted__".toByteArray(Charsets.UTF_8)
+
+    private val obfuscatedNamesRegex = Regex("""CryptoJSAesJson\.decrypt\(\s*(\w+)\s*,\s*(\w+)\s*\)""")
+
+    @Serializable
+    class EncryptedDto(
+        @SerialName("ct") val cipherText: String,
+        @SerialName("s") val salt: String,
+    )
+
+    @Serializable
+    class TSReader(
+        val sources: List<ReaderImageSource>,
+    )
+
+    @Serializable
+    class ReaderImageSource(
+        val images: List<String>,
+    )
 }