juick-xmpp/src/main/java/com/juick/components/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.components.s2s.util;

import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.codec.digest.HmacUtils;

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

    public static String generateDialbackKey(String secret, String to, String from, String id) {
        return HmacUtils.hmacSha256Hex(DigestUtils.sha256(secret),
                (to + " " + from + " " + id).getBytes());
    }
}