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.CertificateException;
  26 import java.security.cert.X509Certificate;
  27
  28 import javax.net.ssl.HostnameVerifier;
  29 import javax.net.ssl.HttpsURLConnection;
  30 import javax.net.ssl.SSLContext;
  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 = (hostname, sslSession) -> true;
  46
  47         private static final TrustManager[] UNQUESTIONING_TRUST_MANAGER = new TrustManager[] { new X509TrustManager() {
  48                 public java.security.cert.X509Certificate[] getAcceptedIssuers() {
  49                         return new java.security.cert.X509Certificate[0];
  50                 }
  51
  52                 public void checkClientTrusted(X509Certificate[] certs, String authType) throws CertificateException {
  53                         // empty implementation
  54                 }
  55
  56                 public void checkServerTrusted(X509Certificate[] certs, String authType) throws CertificateException {
  57                         // empty implementation
  58                 }
  59         } };
  60
  61         public static void turnOffSslChecking() throws NoSuchAlgorithmException, KeyManagementException {
  62                 HttpsURLConnection.setDefaultHostnameVerifier(trivialHostnameVerifier);
  63                 // Install the all-trusting trust manager
  64                 SSLContext sc = SSLContext.getInstance("TLS");
  65                 sc.init(null, UNQUESTIONING_TRUST_MANAGER, null);
  66                 HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
  67         }
  68
  69         public static void turnOnSslChecking() throws KeyManagementException, NoSuchAlgorithmException {
  70                 HttpsURLConnection.setDefaultHostnameVerifier(jvmHostnameVerifier);
  71                 // Return it to the initial state (discovered by reflection, now hardcoded)
  72                 SSLContext sc = SSLContext.getInstance("TLS");
  73                 sc.init(null, null, null);
  74                 HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
  75         }
  76
  77         private HttpsURLConnectionUtils() {
  78                 throw new UnsupportedOperationException("Do not instantiate libraries.");
  79         }
  80 }