add server certificate chain reader test

net-security/src/test/java/org/xbib/net/security/test/SecureSocketReaderTest.java

@@ -0,0 +1,35 @@
+package org.xbib.net.security.test;
+
+import org.junit.jupiter.api.Test;
+import org.xbib.net.security.ssl.util.CertificateUtils;
+
+import javax.net.ssl.SSLSession;
+import javax.net.ssl.SSLSocket;
+import javax.net.ssl.SSLSocketFactory;
+import java.security.cert.Certificate;
+import java.security.cert.X509Certificate;
+import java.util.logging.Logger;
+
+public class SecureSocketReaderTest {
+
+    private static final Logger logger = Logger.getLogger(SecureSocketReaderTest.class.getName());
+
+    public SecureSocketReaderTest() {
+    }
+
+    @Test
+    public void dumpServerCertificateChainAsPem() throws Exception {
+        SSLSocketFactory sslsocketfactory = (SSLSocketFactory) SSLSocketFactory.getDefault();
+        try (SSLSocket sslsocket = (SSLSocket) sslsocketfactory.createSocket("xbib.org", 443)) {
+            sslsocket.startHandshake();
+            SSLSession sslSession = sslsocket.getSession();
+            Certificate[] certificates = sslSession.getPeerCertificates();
+            for (Certificate certificate : certificates) {
+                X509Certificate x509Certificate = (X509Certificate) certificate;
+                logger.info("not before = " + x509Certificate.getNotBefore());
+                logger.info("not after = " + x509Certificate.getNotAfter());
+                logger.info(CertificateUtils.convertToPem(certificate));
+            }
+        }
+    }
+}