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fix(en/aniwave): Fix VRF encrypt/decrypt (#2504)

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Sam 2023-11-11 19:04:47 -05:00 committed by GitHub
parent c5a174704d
commit e2df506b94
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2 changed files with 55 additions and 16 deletions
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2
src/en/aniwave/build.gradle
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@ -8,7 +8,7 @@ ext {
extName = 'Aniwave'
pkgNameSuffix = 'en.nineanime'
extClass = '.Aniwave'
extVersionCode = 57
extVersionCode = 58
libVersion = '13'
}

69
src/en/aniwave/src/eu/kanade/tachiyomi/animeextension/en/nineanime/AniwaveUtils.kt
View File

@ -1,5 +1,6 @@
package eu.kanade.tachiyomi.animeextension.en.nineanime
import android.util.Base64
import eu.kanade.tachiyomi.AppInfo
import eu.kanade.tachiyomi.animeextension.BuildConfig
import eu.kanade.tachiyomi.network.GET
@ -10,6 +11,9 @@ import okhttp3.Headers
import okhttp3.OkHttpClient
import okhttp3.Response
import uy.kohesive.injekt.injectLazy
import java.net.URLDecoder
import javax.crypto.Cipher
import javax.crypto.spec.SecretKeySpec
class AniwaveUtils(private val client: OkHttpClient, private val headers: Headers) {
@ -37,22 +41,10 @@ class AniwaveUtils(private val client: OkHttpClient, private val headers: Header
headers = userAgent,
),
).execute().parseAs<RawResponse>().rawURL
} else if (action == "decrypt") {
vrfDecrypt(query)
} else {
client.newCall(
GET("https://9anime.eltik.net/$action?query=$query&apikey=aniyomi", userAgent),
).execute().use {
val body = it.body.string()
when (action) {
"decrypt" -> {
json.decodeFromString<VrfResponse>(body).url
}
else -> {
json.decodeFromString<VrfResponse>(body).let { vrf ->
"${vrf.vrfQuery}=${java.net.URLEncoder.encode(vrf.url, "utf-8")}"
}
}
}
}
"vrf=${java.net.URLEncoder.encode(vrfEncrypt(query), "utf-8")}"
}
}
@ -60,4 +52,51 @@ class AniwaveUtils(private val client: OkHttpClient, private val headers: Header
val responseBody = use { it.body.string() }
return json.decodeFromString(responseBody)
}
private fun vrfEncrypt(input: String): String {
val rc4Key = SecretKeySpec("ysJhV6U27FVIjjuk".toByteArray(), "RC4")
val cipher = Cipher.getInstance("RC4")
cipher.init(Cipher.DECRYPT_MODE, rc4Key, cipher.parameters)
var vrf = cipher.doFinal(input.toByteArray())
vrf = Base64.encode(vrf, Base64.URL_SAFE or Base64.NO_WRAP)
vrf = Base64.encode(vrf, Base64.DEFAULT or Base64.NO_WRAP)
vrf = vrfShift(vrf)
vrf = Base64.encode(vrf, Base64.DEFAULT)
vrf = rot13(vrf)
return vrf.toString(Charsets.UTF_8)
}
private fun vrfDecrypt(input: String): String {
var vrf = input.toByteArray()
vrf = Base64.decode(vrf, Base64.URL_SAFE)
val rc4Key = SecretKeySpec("hlPeNwkncH0fq9so".toByteArray(), "RC4")
val cipher = Cipher.getInstance("RC4")
cipher.init(Cipher.DECRYPT_MODE, rc4Key, cipher.parameters)
vrf = cipher.doFinal(vrf)
return URLDecoder.decode(vrf.toString(Charsets.UTF_8), "utf-8")
}
private fun rot13(vrf: ByteArray): ByteArray {
for (i in vrf.indices) {
val byte = vrf[i]
if (byte in 'A'.code..'Z'.code) {
vrf[i] = ((byte - 'A'.code + 13) % 26 + 'A'.code).toByte()
} else if (byte in 'a'.code..'z'.code) {
vrf[i] = ((byte - 'a'.code + 13) % 26 + 'a'.code).toByte()
}
}
return vrf
}
private fun vrfShift(vrf: ByteArray): ByteArray {
for (i in vrf.indices) {
val shift = arrayOf(-3, 3, -4, 2, -2, 5, 4, 5)[i % 8]
vrf[i] = vrf[i].plus(shift).toByte()
}
return vrf
}
}