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Temporarily disable SSL verification for testing purposes

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Sometimes in a development or testing environment, the SSL certificate chain might not have been fully established (yet).

To continue developing and testing, you can turn off SSL verification programmatically by installing an “all-trusting” trust manager: 

try {
   // Create a trust manager that does not validate certificate chains
   TrustManager[] trustAllCerts = new TrustManager[] {
      new X509TrustManager() {
       public X509Certificate[] getAcceptedIssuers() {
           return null;
       }
       public void checkClientTrusted(X509Certificate[] certs, String authType) {
       }
       public void checkServerTrusted(X509Certificate[] certs, String authType) {
       }
      }
   };

   // Install the all-trusting trust manager
   SSLContext sc = SSLContext.getInstance("SSL");
   sc.init(null, trustAllCerts, new java.security.SecureRandom());
   HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());

   // Create all-trusting host name verifier
   HostnameVerifier allHostsValid = new HostnameVerifier() {
       public boolean verify(String hostname, SSLSession session) {
           return true;
       }
   };

   // Install the all-trusting host verifier
   HttpsURLConnection.setDefaultHostnameVerifier(allHostsValid);
} catch (NoSuchAlgorithmException | KeyManagementException e) {
    e.printStackTrace();
}
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Networking:
* Networking
* Basic Client and Server Communication using a Socket
* Basic ClientServer Communication using UDP Datagram
* Loading TrustStore and KeyStore from InputStream
* Socket example - reading a web page using a simple socket
* Multicasting
* Temporarily disable SSL verification for testing purposes
* Downloading a file using Channel
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117 Secure objects
118 Pitfalls - threads and concurrency
119 Splitting a string into fixed length parts
120 Pitfalls - nulls and NullPointerException
121 SecurityManager
122 JNDI
123 super keyword
124 java.util.Objects class
125 Java command: java and javaw
126 Atomic types
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129 sun.misc.Unsafe
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180 StringBuffer
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183 CompletableFuture
184 Contributors