package org.jboss.resteasy.test.security;

import org.jboss.arquillian.container.test.api.Deployment;
import org.jboss.arquillian.container.test.api.RunAsClient;
import org.jboss.arquillian.container.test.api.TargetsContainer;
import org.jboss.arquillian.junit.Arquillian;
import org.jboss.logging.Logger;
import org.jboss.resteasy.client.jaxrs.ResteasyClientBuilder;
import org.jboss.resteasy.test.security.resource.SslResource;
import org.jboss.resteasy.utils.TestUtil;
import org.jboss.shrinkwrap.api.Archive;
import org.jboss.shrinkwrap.api.spec.WebArchive;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.runner.RunWith;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import javax.net.ssl.HostnameVerifier;
import javax.ws.rs.ProcessingException;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.core.Response;

import static org.jboss.resteasy.test.ContainerConstants.SSL_CONTAINER_PORT_OFFSET_WRONG;
import static org.jboss.resteasy.test.ContainerConstants.SSL_CONTAINER_QUALIFIER_WRONG;

/**
 * @tpSubChapter Security
 * @tpChapter Integration tests
 * @tpTestCaseDetails Tests for SSL - server secured with certificate with wrong hostname "abc"
 * @tpSince RESTEasy 3.7.0
 */
@RunWith(Arquillian.class)
@RunAsClient
public class SslServerWithWrongHostnameCertificateTest extends SslTestBase {

   private static final Logger LOG = Logger.getLogger(SslServerWithWrongHostnameCertificateTest.class.getName());

   private static KeyStore truststore;

   private static final String SERVER_KEYSTORE_PATH = RESOURCES + "/server-wrong-hostname.keystore";
   private static final String CLIENT_TRUSTSTORE_PATH = RESOURCES + "/client-wrong-hostname.truststore";
   private static final String URL = generateHttpsURL(SSL_CONTAINER_PORT_OFFSET_WRONG);

   @TargetsContainer(SSL_CONTAINER_QUALIFIER_WRONG)
   @Deployment(managed=false, name=DEPLOYMENT_NAME)
   public static Archive<?> createDeployment() {
      WebArchive war = TestUtil.prepareArchive(DEPLOYMENT_NAME);
      return TestUtil.finishContainerPrepare(war, null, SslResource.class);
   }

   @BeforeClass
   public static void prepareTruststore() throws KeyStoreException, IOException, CertificateException, NoSuchAlgorithmException {
      truststore = KeyStore.getInstance("jks");
      try (InputStream in = new FileInputStream(CLIENT_TRUSTSTORE_PATH)) {
         truststore.load(in, PASSWORD.toCharArray());
      }
   }

   @Before
   public void startContainer() throws Exception {
      if (!containerController.isStarted(SSL_CONTAINER_QUALIFIER_WRONG)) {
         containerController.start(SSL_CONTAINER_QUALIFIER_WRONG);
         secureServer(SERVER_KEYSTORE_PATH, SSL_CONTAINER_PORT_OFFSET_WRONG);
         deployer.deploy(DEPLOYMENT_NAME);
      }
   }

   /**
    * @tpTestDetails HostnameVerificationPolicy.STRICT test
    * Client has truststore containing self-signed certificate.
    * Server/endpoint is secured with the same self-signed certificate but server hostname(localhost) is not included among 'subject alternative names' in the certificate.
    * HostnameVerificationPolicy is set to STRICT so exception should be thrown.
    * @tpSince RESTEasy 3.7.0
    */
   @Test(expected = ProcessingException.class)
   public void testHostnameVerificationPolicyStrict() {
      resteasyClientBuilder = (ResteasyClientBuilder) ClientBuilder.newBuilder();
      resteasyClientBuilder.setIsTrustSelfSignedCertificates(false);

      resteasyClientBuilder.hostnameVerification(ResteasyClientBuilder.HostnameVerificationPolicy.STRICT);

      client = resteasyClientBuilder.trustStore(truststore).build();
      client.target(URL).request().get();
   }

   /**
    * @tpTestDetails HostnameVerificationPolicy.WILDCARD test
    * Client has truststore containing self-signed certificate.
    * Server/endpoint is secured with the same self-signed certificate but server hostname(localhost) is not included among 'subject alternative names' in the certificate.
    * HostnameVerificationPolicy is set to WILDCARD so exception should be thrown.
    * @tpSince RESTEasy 3.7.0
    */
   @Test(expected = ProcessingException.class)
   public void testHostnameVerificationPolicyWildcard() {
      resteasyClientBuilder = (ResteasyClientBuilder) ClientBuilder.newBuilder();
      resteasyClientBuilder.setIsTrustSelfSignedCertificates(false);

      resteasyClientBuilder.hostnameVerification(ResteasyClientBuilder.HostnameVerificationPolicy.WILDCARD);

      client = resteasyClientBuilder.trustStore(truststore).build();
      client.target(URL).request().get();
   }

   /**
    * @tpTestDetails HostnameVerificationPolicy.ANY test
    * Client has truststore containing self-signed certificate.
    * Server/endpoint is secured with the same self-signed certificate and server hostname(localhost) is not included among 'subject alternative names' in the certificate.
    * Client should trust the server because HostnameVerificationPolicy is set to ANY.
    * @tpSince RESTEasy 3.7.0
    */
   @Test
   public void testHostnameVerificationPolicyAny() {
      resteasyClientBuilder = (ResteasyClientBuilder) ClientBuilder.newBuilder();
      resteasyClientBuilder.setIsTrustSelfSignedCertificates(false);

      resteasyClientBuilder.hostnameVerification(ResteasyClientBuilder.HostnameVerificationPolicy.ANY);

      client = resteasyClientBuilder.trustStore(truststore).build();
      Response response = client.target(URL).request().get();
      Assert.assertEquals("Hello World!", response.readEntity(String.class));
      Assert.assertEquals(200, response.getStatus());
   }

   /**
    * @tpTestDetails custom hostnameVerifier
    * Client has truststore containing self-signed certificate.
    * Server/endpoint is secured with the same self-signed certificate and server hostname(localhost) is not included among 'subject alternative names' in the certificate.
    * Instead it was generated for hostname "abc".
    * Client should trust the server because custom HostnameVerifier is configured to return true for localhost.
    * @tpSince RESTEasy 3.7.0
    */
   @Test
   public void testCustomHostnameVerifier() {
      resteasyClientBuilder = (ResteasyClientBuilder) ClientBuilder.newBuilder();
      resteasyClientBuilder.setIsTrustSelfSignedCertificates(false);

      HostnameVerifier hostnameVerifier = (s, sslSession) -> s.equals(HOSTNAME);
      resteasyClientBuilder.hostnameVerifier(hostnameVerifier);

      client = resteasyClientBuilder.trustStore(truststore).build();
      Response response = client.target(URL).request().get();
      Assert.assertEquals("Hello World!", response.readEntity(String.class));
      Assert.assertEquals(200, response.getStatus());
   }

   /**
    * @tpTestDetails custom hostnameVerifier - accept all
    * Client has truststore containing self-signed certificate.
    * Server/endpoint is secured with the same self-signed certificate and server actual hostname(localhost) is not included among 'subject alternative names' in the certificate.
    * Client should trust the server because HostnameVerifier acceptAll is configured to return true every time.
    * @tpSince RESTEasy 3.7.0
    */
   @Test
   public void testCustomHostnameVerifierAcceptAll() {
      resteasyClientBuilder = (ResteasyClientBuilder) ClientBuilder.newBuilder();
      resteasyClientBuilder.setIsTrustSelfSignedCertificates(false);

      HostnameVerifier acceptAll = (hostname, session) -> true;
      resteasyClientBuilder.hostnameVerifier(acceptAll);

      client = resteasyClientBuilder.trustStore(truststore).build();
      Response response = client.target(URL).request().get();
      Assert.assertEquals("Hello World!", response.readEntity(String.class));
      Assert.assertEquals(200, response.getStatus());
   }

   @After
   public void after() {
      client.close();
   }

}
