src/main/java/com/juick/server/xmpp/s2s/util/DialbackUtils.java


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/*
 * Copyright (C) 2008-2017, Juick
 *
 * 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 com.juick.server.xmpp.s2s.util;

import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.codec.digest.HmacAlgorithms;
import org.apache.commons.codec.digest.HmacUtils;
import rocks.xmpp.addr.Jid;

/**
 * Created by vitalyster on 05.12.2016.
 */
public class DialbackUtils {
    private DialbackUtils() {
        throw new IllegalStateException();
    }

    public static String generateDialbackKey(String secret, Jid to, Jid from, String id) {
        return new HmacUtils(HmacAlgorithms.HMAC_SHA_256, DigestUtils.sha256(secret))
                .hmacHex(to.toEscapedString() + " " + from.toEscapedString() + " " + id);
    }
}