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 and Nokia
   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.SSLSession;
  31 import javax.net.ssl.TrustManager;
  32 import javax.net.ssl.X509TrustManager;
  33
  34 /**
  35  * Disables and enables certificate and host-name checking in
  36  * HttpsURLConnection, the default JVM implementation of the HTTPS/TLS protocol.
  37  * Has no effect on implementations such as Apache Http Client, Ok Http.
  38  *
  39  * https://stackoverflow.com/questions/23504819/how-to-disable-ssl-certificate-checking-with-spring-resttemplate/58291331#58291331
  40  */
  41 public final class HttpsURLConnectionUtils {
  42
  43         private static final HostnameVerifier jvmHostnameVerifier = HttpsURLConnection.getDefaultHostnameVerifier();
  44
  45         private static final HostnameVerifier trivialHostnameVerifier = new HostnameVerifier() {
  46                 public boolean verify(String hostname, SSLSession sslSession) {
  47                         return true;
  48                 }
  49         };
  50
  51         private static final TrustManager[] UNQUESTIONING_TRUST_MANAGER = new TrustManager[] { new X509TrustManager() {
  52                 public java.security.cert.X509Certificate[] getAcceptedIssuers() {
  53                         return null;
  54                 }
  55
  56                 public void checkClientTrusted(X509Certificate[] certs, String authType) {
  57                 }
  58
  59                 public void checkServerTrusted(X509Certificate[] certs, String authType) {
  60                 }
  61         } };
  62
  63         public static void turnOffSslChecking() throws NoSuchAlgorithmException, KeyManagementException {
  64                 HttpsURLConnection.setDefaultHostnameVerifier(trivialHostnameVerifier);
  65                 // Install the all-trusting trust manager
  66                 SSLContext sc = SSLContext.getInstance("SSL");
  67                 sc.init(null, UNQUESTIONING_TRUST_MANAGER, null);
  68                 HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
  69         }
  70
  71         public static void turnOnSslChecking() throws KeyManagementException, NoSuchAlgorithmException {
  72                 HttpsURLConnection.setDefaultHostnameVerifier(jvmHostnameVerifier);
  73                 // Return it to the initial state (discovered by reflection, now hardcoded)
  74                 SSLContext sc = SSLContext.getInstance("SSL");
  75                 sc.init(null, null, null);
  76                 HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
  77         }
  78
  79         private HttpsURLConnectionUtils() {
  80                 throw new UnsupportedOperationException("Do not instantiate libraries.");
  81         }
  82 }