Make downcast compatible with JDK9+

Signed-off-by: Alexander Scheel <ascheel@redhat.com>
dogtagpki · May 1, 2020 · 971ffdd · 971ffdd
1 parent d92053d
commit 971ffdd
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diff --git a/org/mozilla/jss/ssl/javax/JSSParameters.java b/org/mozilla/jss/ssl/javax/JSSParameters.java
@@ -3,6 +3,7 @@
 import javax.net.ssl.*;
 import java.util.*;
 
+import org.mozilla.jss.util.JDKCompat;
 import org.mozilla.jss.ssl.*;
 
 /**
@@ -55,6 +56,11 @@ public JSSParameters(SSLParameters downcast) {
         if (downcast.getNeedClientAuth()) {
             setNeedClientAuth(downcast.getNeedClientAuth());
         }
+
+        String[] alpn = JDKCompat.SSLParametersHelper.getApplicationProtocols(downcast);
+        if (alpn != null) {
+            setApplicationProtocols(alpn);
+        }
     }
 
     public JSSParameters(String[] cipherSuites) {

diff --git a/org/mozilla/jss/util/JDKCompat.java b/org/mozilla/jss/util/JDKCompat.java
@@ -0,0 +1,21 @@
+package org.mozilla.jss.util;
+
+import java.lang.reflect.Method;
+
+import javax.net.ssl.SSLParameters;
+
+public class JDKCompat {
+    public static class SSLParametersHelper {
+        public static String[] getApplicationProtocols(SSLParameters inst) {
+            try {
+                Method getter = inst.getClass().getMethod("getApplicationProtocols");
+                Object result = getter.invoke(inst);
+                if (result instanceof String[]) {
+                    return (String[]) result;
+                }
+            } catch (Throwable t) {}
+
+            return null;
+        }
+    }
+}