/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.shardingsphere.database.protocol.opengauss.packet.authentication;

import lombok.Getter;

import java.security.SecureRandom;
import java.util.Random;

/**
 * Authentication hex data for openGauss.
 */
@Getter
public final class OpenGaussAuthenticationHexData {
    
    private final String salt;
    
    private final String nonce;
    
    public OpenGaussAuthenticationHexData() {
        salt = generate(64);
        nonce = generate(8);
    }
    
    private String generate(final int length) {
        Random random = new SecureRandom();
        StringBuilder result = new StringBuilder(length);
        for (int i = 0; i < result.capacity(); i++) {
            result.append(Integer.toString(random.nextInt(0x10), 0x10));
        }
        return result.toString();
    }
}
