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/**
 * Copyright 2018-2021 Dynatrace LLC
 *
 * Licensed 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 com.dynatrace.openkit.protocol.ssl;

import com.dynatrace.openkit.api.SSLTrustManager;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLSession;
import javax.net.ssl.X509TrustManager;
import java.security.cert.X509Certificate;

/**
 * Implementation of {@link SSLTrustManager} blindly trusting every certificate and every host.
 * 
 * 

 * This class is intended to be used only during development phase. Since local
 * development environments use self-signed certificates only.
 * This implementation disables any X509 certificate validation and hostname validation.
 * 
 * 
 * 

 * NOTE: DO NOT USE THIS IN PRODUCTION!!
 * 
 */
@SuppressWarnings("all")
public class SSLBlindTrustManager implements SSLTrustManager {

    private final X509TrustManager blindX509TrustManager = new BlindX509TrustManager();
    private final HostnameVerifier blindHostnameVerifier = new BlindHostnameVerifier();

    public SSLBlindTrustManager() {
        System.err.println("###########################################################");
        System.err.println("# WARNING: YOU ARE BYPASSING SSL CERTIFICATE VALIDATION!! #");
        System.err.println("#                 USE AT YOUR OWN RISK!!                  #");
        System.err.println("###########################################################");
    }

    @Override
    public X509TrustManager getX509TrustManager() {
        return blindX509TrustManager;
    }

    @Override
    public HostnameVerifier getHostnameVerifier() {
        return blindHostnameVerifier;
    }

    /**
     * Implementation of {@link X509TrustManager} which is blindly trusting all certificates.
     */
    private static final class BlindX509TrustManager implements X509TrustManager {

        @Override
        public void checkClientTrusted(X509Certificate[] chain, String authType) {
            // intentionally left empty to trust everything
        }

        @Override
        public void checkServerTrusted(X509Certificate[] chain, String authType) {
            // intentionally left empty to trust everything
        }

        @Override
        public X509Certificate[] getAcceptedIssuers() {
            return null;
        }
    }

    /**
     * Implementation of {@link HostnameVerifier} allowing all host names.
     */
    private static final class BlindHostnameVerifier implements HostnameVerifier {

        @Override
        public boolean verify(String hostname, SSLSession session) {
            return true;
        }
    }
}