OF-1004: Add functionality to determine supported encryption protocols/suites.

src/java/org/jivesoftware/openfire/spi/EncryptionArtifactFactory.java

@@ -325,4 +325,30 @@ public class EncryptionArtifactFactory
         }
         return filter;
     }
+
+    /**
+     * Returns the names of all encryption protocols that are supported (but not necessarily enabled).
+     *
+     * @return An array of protocol names. Not expected to be empty.
+     */
+    public static String[] getSupportedProtocols() throws NoSuchAlgorithmException, KeyManagementException
+    {
+        // TODO Might want to cache the result. It's unlikely to change at runtime.
+        final SSLContext context = SSLContext.getInstance( "TLSv1" );
+        context.init( null, null, null );
+        return context.createSSLEngine().getSupportedProtocols();
+    }
+
+    /**
+     * Returns the names of all encryption cipher suites that are supported (but not necessarily enabled).
+     *
+     * @return An array of cipher suite names. Not expected to be empty.
+     */
+    public static String[] getSupportedCipherSuites() throws NoSuchAlgorithmException, KeyManagementException
+    {
+        // TODO Might want to cache the result. It's unlikely to change at runtime.
+        final SSLContext context = SSLContext.getInstance( "TLSv1" );
+        context.init( null, null, null );
+        return context.createSSLEngine().getSupportedCipherSuites();
+    }
 }

src/test/java/org/jivesoftware/openfire/spi/EncryptionArtifactFactoryTest.java

+package org.jivesoftware.openfire.spi;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * Unit tests that verify the functionality of {@link EncryptionArtifactFactory}.
+ *
+ * @author Guus der Kinderen, guus.der.kinderen@gmail.com
+ */
+public class EncryptionArtifactFactoryTest
+{
+    /**
+     * Verifies that the collection of supported encryption protocols is not empty.
+     */
+    @Test
+    public void testHasSupportedProtocols() throws Exception
+    {
+        // Setup fixture.
+        // (not needed)
+
+        // Execute system under test.
+        final String[] result = EncryptionArtifactFactory.getSupportedProtocols();
+
+        // Verify results.
+        Assert.assertTrue( result.length > 0 );
+    }
+
+    /**
+     * Verifies that the collection of supported cipher suites is not empty.
+     */
+    @Test
+    public void testHasSupportedCipherSuites() throws Exception
+    {
+        // Setup fixture.
+        // (not needed)
+
+        // Execute system under test.
+        final String[] result = EncryptionArtifactFactory.getSupportedCipherSuites();
+
+        // Verify results.
+        Assert.assertTrue( result.length > 0 );
+    }
+}