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Thread: Security with applet ?

  1. Apr 26th, 2002, 02:24 PM #1
    DaoK
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    Security with applet ?

    I got that message :

    java.security.AccessControlException: access denied (java.io.FilePermission d:\temp\classe1.java read)

    at java.security.AccessControlContext.checkPermission(AccessControlContext.java:270)

    at java.security.AccessController.checkPermission(AccessController.java:401)

    at java.lang.SecurityManager.checkPermission(SecurityManager.java:542)

    at java.lang.SecurityManager.checkRead(SecurityManager.java:887)

    at java.io.File.length(File.java:790)

    at applet1.actionOuvrirFichier(applet1.java:221)

    at applet1.actionLoginButton(applet1.java:209)

    at applet1.actionPerformed(applet1.java:202)

    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1767)

    at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1820)

    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:419)

    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:257)

    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:258)

    at java.awt.Component.processMouseEvent(Component.java:5021)

    at java.awt.Component.processEvent(Component.java:4818)

    at java.awt.Container.processEvent(Container.java:1380)

    at java.awt.Component.dispatchEventImpl(Component.java:3526)

    at java.awt.Container.dispatchEventImpl(Container.java:1437)

    at java.awt.Component.dispatchEvent(Component.java:3367)

    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3214)

    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:2929)

    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:2859)

    at java.awt.Container.dispatchEventImpl(Container.java:1423)

    at java.awt.Component.dispatchEvent(Component.java:3367)

    at java.awt.EventQueue.dispatchEvent(EventQueue.java:445)

    at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:190)

    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:144)

    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)

    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:130)

    at java.awt.EventDispatchThread.run(EventDispatchThread.java:98)



    ------------------------------------------------------

    Anyone can tell me how to solve that problem ? I have that only when in internet explorer, inside the JBuilder all is ok
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  2. Apr 26th, 2002, 05:21 PM #2
    crptcblade
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    I didn't think you could do file I/O with applets. Is that where the error occurs?
    Laugh, and the world laughs with you. Cry, and you just water down your vodka.


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  3. Apr 26th, 2002, 10:17 PM #3
    DaoK
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    I get that error when I push the button to open the file
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  4. Apr 28th, 2002, 07:34 PM #4
    CaptainPinko
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    Lightbulb

    i believe you are having a problem with the security manager. to prevent malicious applet for ****ing your computer, applets are restricted in their behaviour. what an applet can or canot do is determine by the "priveleges" (i trhink thats what it is called) an applet is awarded, you can probably give rights to the applet throguh some of the options in IE or something. JBuilder probably doesn't bother (ie. bypasses) with the security manager stuff b/c it assumes no moron would compile and run malicous code on their own box.
    "There are only two things that are infinite. The universe and human stupidity... and the universe I'm not sure about." - Einstein

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  6. Apr 29th, 2002, 03:04 AM #5
    Mrs Kensington
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    You need to look into digitally signing your JAR file.

    Sun's page here http://developer.java.sun.com/develo...n/signing.html
    Ford? Theres an infinite number of monkeys outside that want to talk to you about a script of hamlet they've produced!
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