Signed Applet retuns Java.security.AccessControlException

[Nitin Sinha]

Hi,

I have an signed applet that tries to run ipconfig/all on user system to get the unique macAddress from the client machine

but each time I try to run it it throws the folling exception -

                Java.security.AccessControlException: access denied (java.io.FilePermission <<ALL FILES>> execute)

	at java.security.AccessControlContext.checkPermission(Unknown Source)

	at java.security.AccessController.checkPermission(Unknown Source)

	at java.lang.SecurityManager.checkPermission(Unknown Source)

	at java.lang.SecurityManager.checkExec(Unknown Source)

	at java.lang.ProcessBuilder.start(Unknown Source)

	at java.lang.Runtime.exec(Unknown Source)

	at java.lang.Runtime.exec(Unknown Source)

	at MacAddress.getMacAddressesReader(MacAddress.java:102)

	at MacAddress.getMacAddresses(MacAddress.java:30)

	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

	at java.lang.reflect.Method.invoke(Unknown Source)

	at sun.plugin.javascript.JSInvoke.invoke(Unknown Source)

	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

	at java.lang.reflect.Method.invoke(Unknown Source)

	at sun.plugin.javascript.JSClassLoader.invoke(Unknown Source)

	at sun.plugin2.liveconnect.JavaClass$MethodInfo.invoke(Unknown Source)

	at sun.plugin2.liveconnect.JavaClass$MemberBundle.invoke(Unknown Source)

	at sun.plugin2.liveconnect.JavaClass.invoke0(Unknown Source)

	at sun.plugin2.liveconnect.JavaClass.invoke(Unknown Source)

	at sun.plugin2.main.client.LiveConnectSupport$PerAppletInfo$DefaultInvocationDelegate.invoke(Unknown Source)

	at sun.plugin2.main.client.LiveConnectSupport$PerAppletInfo$3.run(Unknown Source)

	at java.security.AccessController.doPrivileged(Native Method)

	at sun.plugin2.main.client.LiveConnectSupport$PerAppletInfo.doObjectOp(Unknown Source)

	at sun.plugin2.main.client.LiveConnectSupport$PerAppletInfo$LiveConnectWorker.run(Unknown Source)

	at java.lang.Thread.run(Unknown Source)

I tried to google the issue but it says that I need to set policy file in bb-manifest.xml. Where do i need to define this file & how would my applet gain refernce to policy from bb-manifest.xml

[Maneesh Godbole]

Looks like you might not have signed the jar properly. Does your signed jar have MYCERT entries under META-INF?

[Ulf Dittmer]

I've never heard of a bb-manifest.xml file; I doubt that it will help in this case.

The code may need to be run as privileged code, though. See HowCanAnAppletReadFilesOnTheLocalFileSystem for more details.