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/*
* Copyright (C) 2021 Elytrium
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package net.elytrium.limboauth.migration;
import java.math.BigInteger;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public enum MigrationHash {
@SuppressWarnings("unused")
AUTHME((hash, password) -> {
String[] arr = hash.split("\\$"); // $SHA$salt$hash
return arr.length == 4 && arr[3].equals(MigrationHash.getSHA256(MigrationHash.getSHA256(password) + arr[2]));
});
final MigrationHashVerifier verifier;
MigrationHash(MigrationHashVerifier verifier) {
this.verifier = verifier;
}
public boolean checkPassword(String hash, String password) {
return this.verifier.checkPassword(hash, password);
}
private static String getSHA256(String string) {
try {
MessageDigest messageDigest = MessageDigest.getInstance("SHA-256");
messageDigest.reset();
messageDigest.update(string.getBytes(StandardCharsets.UTF_8));
byte[] array = messageDigest.digest();
return String.format("%0" + (array.length << 1) + "x", new BigInteger(1, array));
} catch (NoSuchAlgorithmException e) {
throw new IllegalArgumentException(e);
}
}
}
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