Merge pull request #15678 from anujgaud/add-ssl-debug-logs

[BAEL-6064] Add code for enabling SSL Debug Logs

core-java-modules/core-java-security-4/src/main/java/com/baeldung/enablessldebug/SSLDebugLogger.java

@@ -0,0 +1,32 @@
+package com.baeldung.enablessldebug;
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.net.URL;
+
+import javax.net.ssl.HttpsURLConnection;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class SSLDebugLogger {
+    private static final Logger logger = LoggerFactory.getLogger(SSLDebugLogger.class);
+
+    public static void enableSSLDebugUsingSystemProperties() {
+        System.setProperty("javax.net.debug", "ssl");
+    }
+
+    public static void makeHttpsRequest() throws Exception {
+        String url = "https://github.com/eugenp/tutorials";
+        URL httpsUrl = new URL(url);
+        HttpsURLConnection connection = (HttpsURLConnection) httpsUrl.openConnection();
+
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()))) {
+            String line;
+            logger.info("Response from " + url + ":");
+            while ((line = reader.readLine()) != null) {
+                logger.info(line);
+            }
+        }
+    }
+}

core-java-modules/core-java-security-4/src/test/java/com/baeldung/enablessldebug/SSLDebugLoggerUnitTest.java

@@ -0,0 +1,49 @@
+package com.baeldung.enablessldebug;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.PrintStream;
+import java.util.logging.ConsoleHandler;
+import java.util.logging.Level;
+import java.util.logging.LogManager;
+import java.util.logging.Logger;
+
+import org.junit.jupiter.api.Test;
+
+public class SSLDebugLoggerUnitTest {
+    @Test
+     void givenSSLDebuggingEnabled_whenUsingSystemProperties_thenEnableSSLDebugLogging() throws Exception {
+        ByteArrayOutputStream outContent = new ByteArrayOutputStream();
+        System.setErr(new PrintStream(outContent));
+
+        SSLDebugLogger.enableSSLDebugUsingSystemProperties();
+        assertEquals("ssl", System.getProperty("javax.net.debug"));
+
+        SSLDebugLogger.makeHttpsRequest();
+        assertTrue(outContent.toString().contains("javax.net.ssl|DEBUG|"));
+        outContent.reset();
+
+        System.clearProperty("javax.net.debug");
+        assertNull(System.getProperty("javax.net.debug"));
+
+        SSLDebugLogger.makeHttpsRequest();
+        assertEquals(outContent.toString(),"");
+    }
+
+    @Test
+     void givenSSLDebuggingEnabled_whenUsingConfigurationFile_thenEnableSSLDebugLogging() throws IOException {
+        InputStream configFile = SSLDebugLoggerUnitTest.class.getClassLoader().getResourceAsStream("logging.properties");
+        LogManager.getLogManager().readConfiguration(configFile);
+
+        Logger sslLogger = Logger.getLogger("javax.net.ssl");
+        ConsoleHandler consoleHandler = (ConsoleHandler) sslLogger.getHandlers()[0];
+        Level consoleHandlerLevel = consoleHandler.getLevel();
+
+        assertEquals(Level.ALL, consoleHandlerLevel, "SSL ConsoleHandler level should be ALL");
+    }
+}

core-java-modules/core-java-security-4/src/test/resources/logging.properties

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+java.util.logging.ConsoleHandler.level=ALL
+javax.net.ssl.handlers=java.util.logging.ConsoleHandler
+javax.net.ssl.level=ALL