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mangadex_at_home/src/main/kotlin/mdnet/base/server/naclbox.kt
2020-07-02 16:45:33 -05:00

43 lines
1.6 KiB
Kotlin

/*
Mangadex@Home
Copyright (c) 2020, MangaDex Network
This file is part of MangaDex@Home.
MangaDex@Home is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
MangaDex@Home 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this MangaDex@Home. If not, see <http://www.gnu.org/licenses/>.
*/
/* ktlint-disable no-wildcard-imports */
package mdnet.base.server
import com.goterl.lazycode.lazysodium.LazySodiumJava
import com.goterl.lazycode.lazysodium.exceptions.SodiumException
import com.goterl.lazycode.lazysodium.interfaces.Box
@Throws(SodiumException::class)
fun LazySodiumJava.cryptoBoxOpenEasyAfterNm(cipherBytes: ByteArray, nonce: ByteArray, sharedKey: ByteArray): String {
if (!Box.Checker.checkNonce(nonce.size)) {
throw SodiumException("Incorrect nonce length.")
}
if (!Box.Checker.checkBeforeNmBytes(sharedKey.size)) {
throw SodiumException("Incorrect shared secret key length.")
}
val message = ByteArray(cipherBytes.size - Box.MACBYTES)
val res: Boolean = cryptoBoxOpenEasyAfterNm(message, cipherBytes, cipherBytes.size.toLong(), nonce, sharedKey)
if (!res) {
throw SodiumException("Could not fully complete shared secret key decryption.")
}
return str(message)
}