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Redlink SDK for Java
There is a newer version: 1.0.6
/**
 * 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 io.redlink.sdk.util;

import org.jboss.resteasy.client.jaxrs.ResteasyClientBuilder;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManagerFactory;
import java.io.IOException;
import java.io.InputStream;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.Certificate;
import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory;
import java.util.concurrent.TimeUnit;

/**
 * Extended implementation of the ResteasyClientBuilder
 *
 * @author [email protected]
 */
public class RedLinkClientBuilder extends ResteasyClientBuilder {

    //private static Logger log = LoggerFactory.getLogger(RedLinkClientBuilder.class);

    public static final int DEFAULT_TIMEOUT = 10;

    /**
     * Build a RedLink Rest Client with the default timeout for requests
     */
    public RedLinkClientBuilder() {
        this(DEFAULT_TIMEOUT);
    }

    /**
     * Build a RedLink Rest Client with a custom timeout and certificate for requests
     *
     * @param timeout requests' timeout in seconds
     */
    public RedLinkClientBuilder(long timeout) {
        super();
        this.establishConnectionTimeout(timeout, TimeUnit.SECONDS);
        this.connectionPoolSize(5);

        //ssl/tls stuff
        SSLContext ctx = null;
        try {
            // load the certificate
            InputStream fis = this.getClass().getResourceAsStream("/redlink-CA.crt");
            CertificateFactory cf = CertificateFactory.getInstance("X.509");
            Certificate cert = cf.generateCertificate(fis);

            // Load the keyStore that includes self-signed cert as a "trusted" entry
            KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
            keyStore.load(null, null);
            TrustManagerFactory tmf = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
            keyStore.setCertificateEntry("redlink-CA", cert);
            tmf.init(keyStore);
            ctx = SSLContext.getInstance("SSLv3");
            ctx.init(null, tmf.getTrustManagers(), null);
            //SSLSocketFactory sslFactory = ctx.getSocketFactory();
        } catch (CertificateException | KeyStoreException | NoSuchAlgorithmException | KeyManagementException | IOException e) {
            e.printStackTrace();
        }
        if (ctx == null) {
            disableTrustManager();
        } else {
            sslContext(ctx);
        }

    }

}