From 5950c1c1d14d90bc14ddb5f06b3868b60d022055 Mon Sep 17 00:00:00 2001
From: jmir1 <jhmiramon@gmail.com>
Date: Wed, 14 Jul 2021 17:09:55 +0200
Subject: [PATCH] idk how to decrypt shit ;(((

---
 .../animeextension/en/twistmoe/AESDecrypt.kt  | 53 +++++++++++++++++++
 .../animeextension/en/twistmoe/TwistMoe.kt    | 17 ++++++
 2 files changed, 70 insertions(+)
 create mode 100644 src/en/twistmoe/src/eu/kanade/tachiyomi/animeextension/en/twistmoe/AESDecrypt.kt

diff --git a/src/en/twistmoe/src/eu/kanade/tachiyomi/animeextension/en/twistmoe/AESDecrypt.kt b/src/en/twistmoe/src/eu/kanade/tachiyomi/animeextension/en/twistmoe/AESDecrypt.kt
new file mode 100644
index 000000000..84cfffd12
--- /dev/null
+++ b/src/en/twistmoe/src/eu/kanade/tachiyomi/animeextension/en/twistmoe/AESDecrypt.kt
@@ -0,0 +1,53 @@
+package eu.kanade.tachiyomi.animeextension.en.twistmoe
+import android.annotation.TargetApi
+import android.os.Build
+import android.util.Log
+import java.security.MessageDigest
+import java.util.Base64
+import javax.crypto.Cipher
+import javax.crypto.spec.IvParameterSpec
+import javax.crypto.spec.SecretKeySpec
+
+@TargetApi(Build.VERSION_CODES.O)
+class AESDecrypt {
+    private val decoder = Base64.getDecoder()
+    private val encoder = Base64.getEncoder()
+    fun aesEncrypt(v: String, secretKey: ByteArray, initializationVector: ByteArray) = encrypt(v, secretKey, initializationVector)
+    fun aesDecrypt(v: ByteArray, secretKey: ByteArray, initializationVector: ByteArray) = decrypt(v, secretKey, initializationVector)
+    fun getIvAndKey(v: String): ByteArray {
+        val byteStr = decoder.decode(v.toByteArray(Charsets.UTF_8))
+        val md5 = MessageDigest.getInstance("MD5")
+        assert(byteStr.decodeToString(0, 8) == "Salted__")
+        val salt = byteStr.sliceArray(8..15)
+        val secretStr = "267041df55ca2b36f2e322d05ee2c9cf"
+        val secret = secretStr
+            .map { it.toByte() }
+            .toByteArray()
+        val step1 = md5.digest(salt)
+        val step2 = step1 + md5.digest(step1 + secret)
+        val step3 = step2 + md5.digest(step2 + secret)
+        Log.i("lol", step3.decodeToString())
+        assert(step3.lastIndex == 47)
+        return step3
+    }
+    fun getToDecode(v: String): ByteArray {
+        val byteStr = decoder.decode(v.toByteArray(Charsets.UTF_8))
+        assert(byteStr.decodeToString(0, 8) == "Salted__")
+        return byteStr.sliceArray(16..byteStr.lastIndex)
+    }
+    private fun cipher(opmode: Int, secretKey: ByteArray, initializationVector: ByteArray): Cipher {
+        if (secretKey.lastIndex != 31) throw RuntimeException("SecretKey length is not 32 chars")
+        val c = Cipher.getInstance("AES/CBC/NoPadding")
+        val sk = SecretKeySpec(secretKey, "AES")
+        val iv = IvParameterSpec(initializationVector)
+        c.init(opmode, sk, iv)
+        return c
+    }
+    private fun encrypt(str: String, secretKey: ByteArray, iv: ByteArray): String {
+        val encrypted = cipher(Cipher.ENCRYPT_MODE, secretKey, iv).doFinal(str.toByteArray(Charsets.UTF_8))
+        return String(encoder.encode(encrypted))
+    }
+    private fun decrypt(str: ByteArray, secretKey: ByteArray, iv: ByteArray): String {
+        return String(cipher(Cipher.DECRYPT_MODE, secretKey, iv).doFinal(str))
+    }
+}
diff --git a/src/en/twistmoe/src/eu/kanade/tachiyomi/animeextension/en/twistmoe/TwistMoe.kt b/src/en/twistmoe/src/eu/kanade/tachiyomi/animeextension/en/twistmoe/TwistMoe.kt
index 416e8e7cc..c42a8363f 100644
--- a/src/en/twistmoe/src/eu/kanade/tachiyomi/animeextension/en/twistmoe/TwistMoe.kt
+++ b/src/en/twistmoe/src/eu/kanade/tachiyomi/animeextension/en/twistmoe/TwistMoe.kt
@@ -1,5 +1,6 @@
 package eu.kanade.tachiyomi.animeextension.en.twistmoe
 
+import android.util.Log
 import com.google.gson.JsonArray
 import com.google.gson.JsonElement
 import com.google.gson.JsonObject
@@ -54,6 +55,8 @@ class TwistMoe : AnimeHttpSource() {
                 1 -> SAnime.ONGOING
                 else -> SAnime.UNKNOWN
             }
+            anime.thumbnail_url = "https://homepages.cae.wisc.edu/~ece533/images/cat.png"
+            anime.initialized = true
             animeList.add(anime)
         }
         return AnimesPage(animeList, false)
@@ -89,12 +92,20 @@ class TwistMoe : AnimeHttpSource() {
         return anime
     }
 
+    override fun videoListRequest(episode: SEpisode): Request {
+        return super.videoListRequest(episode)
+    }
+
     override fun videoListParse(response: Response): List<Video> {
         val responseString = response.body!!.string()
         val jElement: JsonElement = JsonParser.parseString(responseString)
         val jObject: JsonObject = jElement.asJsonObject
         val server = jObject.get("videos_manifest").asJsonObject.get("servers").asJsonArray[0].asJsonObject
         val streams = server.get("streams").asJsonArray
+        val aes = AESDecrypt()
+        val ivAndKey = aes.getIvAndKey("U2FsdGVkX19njUQXx448lKxE4wUQA8tH45sgjCYckbrdS15QHY3fW5ChD6UpcoackxmWn8/5Tk88yAAwSukKwKpfvI6rQ1ERxFcAspfBCj8U/IQYoE3gZy+Esgumt/Fz")
+        val toDecode = aes.getToDecode("U2FsdGVkX19njUQXx448lKxE4wUQA8tH45sgjCYckbrdS15QHY3fW5ChD6UpcoackxmWn8/5Tk88yAAwSukKwKpfvI6rQ1ERxFcAspfBCj8U/IQYoE3gZy+Esgumt/Fz")
+        Log.i("lol", aes.aesDecrypt(toDecode, ivAndKey.sliceArray(0..31), ivAndKey.sliceArray(32..47)))
         val linkList = mutableListOf<Video>()
         for (stream in streams) {
             if (stream.asJsonObject.get("kind").asString != "premium_alert") {
@@ -105,6 +116,12 @@ class TwistMoe : AnimeHttpSource() {
     }
 
     override fun episodeListRequest(anime: SAnime): Request {
+        val aes = AESDecrypt()
+        val ivAndKey = aes.getIvAndKey("U2FsdGVkX19njUQXx448lKxE4wUQA8tH45sgjCYckbrdS15QHY3fW5ChD6UpcoackxmWn8/5Tk88yAAwSukKwKpfvI6rQ1ERxFcAspfBCj8U/IQYoE3gZy+Esgumt/Fz")
+        val toDecode = aes.getToDecode("U2FsdGVkX19njUQXx448lKxE4wUQA8tH45sgjCYckbrdS15QHY3fW5ChD6UpcoackxmWn8/5Tk88yAAwSukKwKpfvI6rQ1ERxFcAspfBCj8U/IQYoE3gZy+Esgumt/Fz")
+        Log.i("lol_key", ivAndKey.sliceArray(0..31).decodeToString())
+        Log.i("lol_iv", ivAndKey.sliceArray(32..47).decodeToString())
+        Log.i("lol_final", aes.aesDecrypt(toDecode, ivAndKey.sliceArray(0..31), ivAndKey.sliceArray(32..47)))
         val slug = anime.url.substringAfter("/a/")
         return GET("https://api.twist.moe/api/anime/$slug/sources", popularRequestHeaders)
     }