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/*
* Copyright (C) 2024 NotEnoughUpdates contributors
*
* This file is part of NotEnoughUpdates.
*
* NotEnoughUpdates is free software: you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, either
* version 3 of the License, or (at your option) any later version.
*
* NotEnoughUpdates is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with NotEnoughUpdates. If not, see <https://www.gnu.org/licenses/>.
*/
package io.github.moulberry.notenoughupdates.miscfeatures.updater
import io.github.moulberry.notenoughupdates.util.JarUtil
import java.io.InputStream
import java.security.KeyFactory
import java.security.PublicKey
import java.security.Signature
import java.security.spec.X509EncodedKeySpec
object SigningPool {
data class PK(
val name: String,
val publicKey: PublicKey,
)
fun load(): List<PK> {
val l = JarUtil.access.listFiles("trusted_team_members")
return l.filter { it.endsWith(".key") }
.map {
loadPK(
it.substringBeforeLast('.'),
JarUtil.access.read("trusted_team_members/$it")
)
}
}
fun loadPK(name: String, inputStream: InputStream): PK {
val publicKeyBytes = inputStream.readBytes()
val x509EncodedKeySpec = X509EncodedKeySpec(publicKeyBytes)
return PK(name, KeyFactory.getInstance("RSA").generatePublic(x509EncodedKeySpec))
}
val keyPool = load().associateBy { it.name }
fun verifySignature(name: String, inputStream: InputStream, signatureBytes: ByteArray): Boolean {
val signature = Signature.getInstance("SHA256withRSA")
signature.initVerify(keyPool[name]?.publicKey ?: return false)
val b = ByteArray(4096)
while (true) {
val read = inputStream.read(b)
if (read < 0) break
signature.update(b, 0, read)
}
return signature.verify(signatureBytes)
}
}
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