Re: Self-signed security certificates.. (oh, the evil)

"Darren" <Daz@xxxxxxxxxxxxxxx> wrote in message
news:bIZVe.6391$st1.4056@xxxxxxxxxxxxxxxxxxxxxxx
>
> "Dag Sunde" <me@xxxxxxxxxxxx> wrote in message
> news:LwaVe.5479$qE.1203426@xxxxxxxxxxxxxxxxxx
>> "Darren" <Daz@xxxxxxxxxxxxxxx> wrote in message
>> news:j3WUe.4364$st1.3086@xxxxxxxxxxxxxxxxxxxxxxx
>> >
>> <snipped>
>> > Well that is one method i see for solving my problem now bear in mind
> that
>> > i
>> > know very little of java security and policies other than what you good
>> > people have told me and what i have found on google but if either i can
>> > get
>> > a web client to temorarily use my own policy file where it can get
>> > permission to open a socket to my web site and read from it or find
>> > another
>> > way to do like a self signed sertificate it then that would be cool.
>>
>> Darren...
>>
>> Let's clear up this once and for all?
>>
>> Your scenario is that:
>> * You have two web-servers
>> * Server A does NOT have server-side scripting available (B Does)
>> * On a web-page served from server A, you would like to inform
>> the user if server B is up and running.
>> * You tried to solve this by writing an Applet on the page from
>> server A. This Applet tried to open something on Server B.
>> If this was successful you would know that Server B was running.
>> * Your applet was stopped by a security-exception because it tried
>> to do a cross-domain request.
>> * I think it was I that lead you down the path to the .policy file.
>> That was wrong of me, and I just did it to verify that you
>> development machine didn't have any special setup.
>> * From this piont on, *forget* about .policy files.
>> * Create a jar file with a manifest from your original applet
>> * Use the following procedure to create a self-signed certificate
>> and sign your applet:
>> http://www.jensign.com/JavaScience/www/selfsigned/
>> * redeploy the applet, and things should be working.
>> * No need for any special security or permissino code.
>>
>> (Or have I completely missed the point here?)
> nope. Nail on head. :)
> Al goes well until i try implemeting itthen i get a class not found
> load: class Helloserver.class not found.
> java.lang.ClassNotFoundException: Helloserver.class
> at sun.applet.AppletClassLoader.findClass(Unknown Source)
<snipped/>
>
> "C:\applets\Helloserver.jar\Helloserver\class.class "
>
> Something wrong there. the class is called helloserver.class not
> class.class
> and it's located in c:\applets\ not in c:\applets\helloserver.
>

C:\... ???

Can you post the html you use to load the applet? Ie. the webpage containing
the applet.


> I tried to open the jar file with winzip and i got "failed to load
> main-class manifest attribute from c:\archive\Helloserver.jar"
> Am I right in thinking the manifestis something to do with the security of
> the signature of the jar?
>
Yes, the Jar file must have a manifest to be signed, but the 'jar' command
will add a default one if you don't specify one manually:

jar cfv test.jar MyClass.class


> Also am I right in thinking that once i've created the signiture, I can
> sign
> as many applets as I want with the same signiture?
>

Yes, that is correct.

--
Dag.


.

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