This may be old error but I am stuck here.
I created Java applet to access an Oracle database. I am going to put this applet in Local Network. My applet works fine in Eclipse and Netbeans but when I run through 'appletviewer' it goes at connection string and showing an error:
Error e java.security.AccessControlException: access denied (
"java.util.PropertyPermission" "oracle.net.wallet_location" "read")
I already signed applet using this Oracle technique for Signed Applets.
I used the user of database who has full rights. Also when I run using policy file, it shows the same error.
How do I connect the applet to the database successfully?
The HTML used to load the applet is:
<applet
code=tree.pacg.DrawApplet.class
codebase=c:\tree\pacg
archive=DrawApplet.jar,ojdbc14.jar
height="800"
width="1000">
</applet>
Its solved !!
I signed the ojdbc14.jar file and it works !!
also I create new policy file and gave it 'All' access permission then it also work through 'appletviewer'
Thanks..Thank you sir..
when i run the applet in ie, it show security warning Java has discovered application components that could indicate a secuirty concern.
Something like this?
BTW - if you click No at this point, the code should not be blocked and should therefore run.
But even seeing that dialog is a nuisance. If it can be confusing to developers, it is bound to be confusing to an end user.
See Mixing Signed and Unsigned Code
Ensuring Application and Applet Security for an explanation of this behavior. But see particularly Deploying Signed Applications and Applets Securely Without a Mixed Code Warning for how to allow mixing of unsigned & signed code.
The other alternative - to sign all Jars using the same certificate - also works, but is sometimes forbidden by deployment licenses or other factors.
On signing the code.
Me.
3) ojdbc14.jar needs to be digitally signed when deploying this way. Is ojdbc14.jar digitally signed?
OP.
3) ojdbc14.jar is a oracle database drivers so that they are already signed
..followed 4 hours later by..
I signed the ojdbc14.jar file and it works !!
Related
I would like to run applets without the security restrictions imposed on sandbox. The applet should be able to access client resources such as the local filesystem (upload a file from the local PC).
The source code is written in NetBeans, which supports the applet self-sign. Following the solution in question
How to self-sign an applet with NetBeans?
and using
Project Properties/WebStart/Customize/
these options are set:
Signing = self-sign by a generated key,
Mixed code = Enable software protection.
Unfortunately, the following error occurs:
AccessControlException: access denied, java.io.permition "test.jpg" read
Did I do something wrong or self-signed applets can run only in the sandbox? Is there any way to solve the problem using NetBeans?
Sorry for my beginner-question, but my native language is C/C++. Thanks for your help.
I just programmed a simple applet. The problem is that my applet isn't able to communicate with my servlet running on port 8181. Every time the applet tries to establish a connection I get the error:
java.security.AccessControlException: access denied ("java.net.SocketPermission" " Server IP:80" "connect,resolve")
I already added my applet to the whitelist of java security control, but this doesn't solve the problem.
I can't imagine that there is no way to make this work. The applet is just for my own use, so i dont see the need to sign it.
Maybe you don't see the need. But your view does not matter in this case. Since Java 7u25 all applets must be signed.
See the Oracle page on Java Applet & Web Start - Code Signing for details.
For my education I often have to program math exercises for our site, which will be used in schools.
I had to port a .swf file to java applet, mainly because the .swf ran really slow.
The game/excercise worked fine in both Eclipse and my localhost, but when we put it on the site it always got blocked by Java.
I have read that you need a certificate, but that self signed certificates dont work.
I have tried to do it (Not sure if I was succesful), and the applet was still blocked.
What am I supposed to do to make it work?
Why don't you try Java Web Start instead of applets?
You chan check it at http://www.oracle.com/technetwork/java/javase/applet-migration-139512.html
From https://www.java.com/en/download/help/java_blocked.xml
Java has further enhanced security to make the user system less
vulnerable to external exploits. Starting with Java 7 Update 51, Java
does not allow users to run applications that are not signed
(unsigned), self-signed (not signed by trusted authority) or that are
missing permission attributes.
So, from Java 7 Update 51, users cannot run unsigned application (without a certificate), self-signed application (applications signed with a certificate that doesn't come from trusted authority), or applications missing Permission Attribute.
As the documentation says about self signed applications,
Applications of this type present the highest level of risk because
publisher is not identified and the application may be granted access
to personal data on your computer.
Also, as stated in the documentation, if you can still use self signed applications you need to add it to the exception site list,
As a workaround, you can use the Exception Site list feature to run
the applications blocked by security settings. Adding the URL of the
blocked application to the Exception Site list allows it to run with
some warnings.
First i would like to say that the .jar does not contain any malicious software or code. It's not harmfull, everything is fine. I signed my .jar and I'm trying to load it into my website using this code:
<applet width="765" height="503" code="Loader.java" archive="HolyDivinity718V1.1.jar" name="Holy Divinity"></applet></p>
But when i run it i get this error:
Application Blocked. Click for details. Your security settings have blocked a self-signed application from running.
The client is a webclient of a game that I'm running. What's the reason that it's getting blocked?
Since recently all self signed java applets are blocked. You can do one of the following things:
Buy and sign your applet with an official certificate
Decrease your security slider to medium
Use the exception site list
Sign your app with a self signed certificate and add your certificate to the java trust store
i wrote a web application which is used in our intranet. I alswo wrote a small Java Applet to integrate with our windows desktops (opening applications and files). Of course i get a security warning everytime i access my web application.
I've read on stackoverflow that it should be possible, to sign my applet and roll out the certificate to all my clients (Windows XP and Windows 7) to get rid of the securitywarning.
Is there a tutorial how to do that? Can i do that without purchasing a expensive certificate because i'm only using this application in my intranet?
Thx for any information and best regards!
I found the solution here: http://wikigu.blogspot.co.at/2011/06/signing-java-applet-with-your-own-ca.html
The last step is to install the generated crt (in the example it's the "server.crt") file into the Trusted Publishers certificate store.
Edit: i just realized that it is just working in Internet Explorer (applet is executed without any warning or dialogue) but not in Firefox. Firefox still shows a security warning. Does anybody know how to get rid of the warning in Firefox?