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fix(lib): Fix chillx-extractor + refactorate tokuzilla (#2303)

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This commit is contained in:
Claudemirovsky
2023-10-02 07:11:33 -03:00
committed by GitHub
parent cf86e3013d
commit c155157ffb
3 changed files with 109 additions and 125 deletions
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26
lib/chillx-extractor/src/main/java/eu/kanade/tachiyomi/lib/chillxextractor/ChillxExtractor.kt
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@ -19,9 +19,8 @@ class ChillxExtractor(private val client: OkHttpClient, private val headers: Hea
private val playlistUtils by lazy { PlaylistUtils(client, headers) }
companion object {
private const val KEY = "m4H6D9%0${'$'}N&F6rQ&"
private val REGEX_MASTER_JS by lazy { Regex("""MasterJS\s*=\s*'([^']+)""") }
private val REGEX_MASTER_JS by lazy { Regex("""JScript\s*=\s*'([^']+)""") }
private val REGEX_EVAL_KEY by lazy { Regex("""eval\(\S+\("(\S+)",\d+,"(\S+)",(\d+),(\d+),""") }
private val REGEX_SOURCES by lazy { Regex("""sources:\s*\[\{"file":"([^"]+)""") }
private val REGEX_FILE by lazy { Regex("""file: ?"([^"]+)"""") }
private val REGEX_SOURCE by lazy { Regex("""source = ?"([^"]+)"""")}
@ -37,7 +36,8 @@ class ChillxExtractor(private val client: OkHttpClient, private val headers: Hea
val master = REGEX_MASTER_JS.find(body)?.groupValues?.get(1) ?: return emptyList()
val aesJson = json.decodeFromString<CryptoInfo>(master)
val decryptedScript = decryptWithSalt(aesJson.ciphertext, aesJson.salt, KEY)
val key = getKey(body)
val decryptedScript = decryptWithSalt(aesJson.ciphertext, aesJson.salt, key)
.replace("\\n", "\n")
.replace("\\", "")
@ -80,6 +80,24 @@ class ChillxExtractor(private val client: OkHttpClient, private val headers: Hea
)
}
private fun getKey(body: String): String {
val (encrypted, pass, offset, index) = REGEX_EVAL_KEY.find(body)!!.groupValues.drop(1)
val decrypted = decryptScript(encrypted, pass, offset.toInt(), index.toInt())
return decrypted.substringAfter("'").substringBefore("'")
}
private fun decryptScript(encrypted: String, pass: String, offset: Int, index: Int): String {
val trimmedPass = pass.substring(0, index)
val bits = encrypted.split(pass[index]).map { item ->
trimmedPass.foldIndexed(item) { index, acc, it ->
acc.replace(it.toString(), index.toString())
}
}.filter(String::isNotBlank)
return bits.joinToString("") { Char(it.toInt(index) - offset).toString() }
}
@Serializable
data class CryptoInfo(
@SerialName("ct")