List<CipherSuite> customCipherSuites = asList(
        CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
        CipherSuite.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
        CipherSuite.TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384,
        CipherSuite.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384);
    final ConnectionSpec spec = new ConnectionSpec.Builder(ConnectionSpec.MODERN_TLS)
        .cipherSuites(customCipherSuites.toArray(new CipherSuite[0]))

                trustManagerFactory.init(keyStore);

                final SSLContext sslContext = SSLContext.getInstance("TLS");
                sslContext.init(null, trustManagerFactory.getTrustManagers(), null);
                sslSocketFactory = sslContext.getSocketFactory();
            } catch (final Exception e) {

import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;

import okhttp3.OkHttpClient;
import okhttp3.Protocol;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.tls.HandshakeCertificates;
import org.junit.Test;
import org.junit.runner.RunWith;
import javax.net.ssl.SSLHandshakeException;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

            trustManagerFactory.init(keyStore);

            SSLContext sslContext = SSLContext.getInstance("TLS");
            sslContext.init(null, trustManagerFactory.getTrustManagers(), null);

            Curl.get("https://localhost:9200/").sslSocketFactory(sslContext.getSocketFactory()).execute(response -> {

import okhttp3.Call;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.mockwebserver.MockResponse;
import okhttp3.mockwebserver.MockWebServer;
import okhttp3.tls.HandshakeCertificates;
import okhttp3.tls.HeldCertificate;

/**
 * Create an HTTPS server with a self-signed certificate that OkHttp trusts.
 */
public class HttpsServer {
  public void run() throws Exception {

import java.io.IOException;
import java.security.cert.X509Certificate;
import okhttp3.Headers;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.tls.Certificates;
import okhttp3.tls.HandshakeCertificates;

public final class CustomTrust {
  // PEM files for root certificates of Comodo and Entrust. These two CAs are sufficient to view

 * 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 okhttp3.tls;

import java.security.cert.X509Certificate;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;

public class CertificatesJavaTest {
  @Test

import okhttp3.Response;
import okhttp3.mockwebserver.MockResponse;
import okhttp3.mockwebserver.MockWebServer;

/**
 * Create UNIX domain sockets for MockWebServer and OkHttp and connect 'em together. Note that we
 * cannot do TLS over domain sockets.
 */
public class ClientAndServer {
  public void run() throws Exception {
    File socketFile = new File("/tmp/ClientAndServer.sock");
    socketFile.delete(); // Clean up from previous runs.

    TrustManagerFactory trustManagerFactory =
        TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
    trustManagerFactory.init(keystore);

    SSLContext sslContext = SSLContext.getInstance("TLS");
    sslContext.init(
        keyManagerFactory.getKeyManagers(),
        trustManagerFactory.getTrustManagers(),
        new SecureRandom());

    return sslContext;
  }