/*
 * ====================================================================
 * 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */

package org.apache.hc.client5.http.ssl;

import java.security.AccessController;
import java.security.PrivilegedAction;

import javax.net.ssl.HostnameVerifier;

import org.apache.hc.client5.http.psl.PublicSuffixMatcherLoader;
import org.apache.hc.core5.util.TextUtils;

/**
 * HTTPS configuration support methods.
 *
 * @since 5.0
 */
public final class HttpsSupport {

    private static String[] split(final String s) {
        if (TextUtils.isBlank(s)) {
            return null;
        }
        return s.split(" *, *");
    }

    private static String getProperty(final String key) {
        return AccessController.doPrivileged((PrivilegedAction<String>) () -> System.getProperty(key));
    }

    public static String[] getSystemProtocols() {
        return split(getProperty("https.protocols"));
    }

    public static String[] getSystemCipherSuits() {
        return split(getProperty("https.cipherSuites"));
    }

    public static HostnameVerifier getDefaultHostnameVerifier() {
        return new DefaultHostnameVerifier(PublicSuffixMatcherLoader.getDefault());
    }

}
