dashboard/webapp-backend/src/main/java/org/oransc/ric/portal/dashboard/util/HttpsURLConnectionUtils.java

   1 /*-
   2  * ========================LICENSE_START=================================
   3  * O-RAN-SC
   4  * %%
   5  * Copyright (C) 2019 AT&T Intellectual Property
   6  * %%
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ========================LICENSE_END===================================
  19  */
  20
  21 package org.oransc.ric.portal.dashboard.util;
  22
  23 import java.security.KeyManagementException;
  24 import java.security.NoSuchAlgorithmException;
  25 import java.security.cert.X509Certificate;
  26
  27 import javax.net.ssl.HostnameVerifier;
  28 import javax.net.ssl.HttpsURLConnection;
  29 import javax.net.ssl.SSLContext;
  30 import javax.net.ssl.TrustManager;
  31 import javax.net.ssl.X509TrustManager;
  32
  33 /**
  34  * Disables and enables certificate and host-name checking in
  35  * HttpsURLConnection, the default JVM implementation of the HTTPS/TLS protocol.
  36  * Has no effect on implementations such as Apache Http Client, Ok Http.
  37  *
  38  * https://stackoverflow.com/questions/23504819/how-to-disable-ssl-certificate-checking-with-spring-resttemplate/58291331#58291331
  39  */
  40 public final class HttpsURLConnectionUtils {
  41
  42     private static final HostnameVerifier jvmHostnameVerifier = HttpsURLConnection.getDefaultHostnameVerifier();
  43
  44     private static final HostnameVerifier trivialHostnameVerifier = (hostname, sslSession) -> true;
  45
  46     private static final TrustManager[] UNQUESTIONING_TRUST_MANAGER = new TrustManager[] {new X509TrustManager() {
  47         @SuppressWarnings("squid:S1168") // Must return null to get wanted behaviour.
  48         @Override
  49         public java.security.cert.X509Certificate[] getAcceptedIssuers() {
  50             return null;
  51         }
  52
  53         @Override
  54         public void checkClientTrusted(X509Certificate[] certs, String authType) {
  55             // Do nothing.
  56         }
  57
  58         @Override
  59         public void checkServerTrusted(X509Certificate[] certs, String authType) {
  60             // Do nothing.
  61         }
  62     }};
  63
  64     public static void turnOffSslChecking() throws NoSuchAlgorithmException, KeyManagementException {
  65         HttpsURLConnection.setDefaultHostnameVerifier(trivialHostnameVerifier);
  66         // Install the all-trusting trust manager
  67         SSLContext sc = SSLContext.getInstance("SSL");
  68         sc.init(null, UNQUESTIONING_TRUST_MANAGER, null);
  69         HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
  70     }
  71
  72     public static void turnOnSslChecking() throws KeyManagementException, NoSuchAlgorithmException {
  73         HttpsURLConnection.setDefaultHostnameVerifier(jvmHostnameVerifier);
  74         // Return it to the initial state (discovered by reflection, now hardcoded)
  75         SSLContext sc = SSLContext.getInstance("SSL");
  76         sc.init(null, null, null);
  77         HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
  78     }
  79
  80     private HttpsURLConnectionUtils() {
  81         throw new UnsupportedOperationException("Do not instantiate libraries.");
  82     }
  83 }