mangadex_at_home/src/main/kotlin/mdnet/base/server/crypto.kt

/*
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 java.security.MessageDigest
import javax.crypto.Cipher
import javax.crypto.spec.SecretKeySpec

fun getRc4(key: ByteArray): Cipher {
    val rc4 = Cipher.getInstance("RC4")
    rc4.init(Cipher.ENCRYPT_MODE, SecretKeySpec(key, "RC4"))
    return rc4
}

fun md5Bytes(stringToHash: String): ByteArray {
    val digest = MessageDigest.getInstance("MD5")
    return digest.digest(stringToHash.toByteArray())
}

fun printHexString(bytes: ByteArray): String {
    val sb = StringBuilder()
    for (b in bytes) {
        sb.append(String.format("%02x", b))
    }
    return sb.toString()
}