I recently updated to Java 7 (Update 45) and now my website applet deployment is triggering two security dialogs. The first one is the "normal" one, that shows the information of the certificate that signed the applet. Everything fine with that. However a second popup occurs now right after that, asking again to allow the Java application (must be the applet).
Why is that second dialog appearing and how does one control what values are used there for application name and publisher?
Allow access to the following application from this website?
You need to include Caller-Allowable-Codebase: in your manifest file. If you need to be able to use it from different domains and you know them all in advance then you can just include them in a space separated list. If you don't know all domains you'll be deploying to then use * as the value instead.
See this page for details on this attribute: http://docs.oracle.com/javase/7/docs/technotes/guides/jweb/manifest.html#caller_allowable
http://java.com/en/download/help/javascript_applet.xml
The website uses JavaScript code in conjunction with the Java application. This message is shown to alert you of a possible security concern because the website was not explicitly granted access permission by the application.
This is part of the new security feature introduced in Java 7 update 45:
http://www.oracle.com/technetwork/java/javase/7u45-relnotes-2016950.html#newft
The JavaScript to Java (LiveConnect) security dialog prompt is shown once per Applet classLoader instance
I don't checked it yet, but it looks like one needs to assamble different builds for each domain where the applet shall run, now.
Related
I'm using IntelliJ IDEA, I have coded a frame which I want to put into an HTML file so I can run it in my browser, how do I do this now that I cannot use JApplet? I have found this documentation: http://docs.oracle.com/javase/tutorial/deployment/webstart/deploying.html and this http://docs.oracle.com/javase/tutorial/deployment/webstart/deploying.html but I am new to programming and find this difficult to follow. I don't know for instance how I would go about putting my class files and the image that I used in a separate directory nor do I know how I go about signing my application so that it will run in a browser.
I want to put into an HTML file so I can run it in my browser,
You can use the Desktop class. This class allows you to access default applications from your desktop.
Read the section from the Swing tutorial o How to Integrate With the Desktop class for more information and working examples.
See Java Plugin support deprecated and Moving to a Plugin-Free Web.
Note that is one of my 'copy/paste comments' that does not explicitly mention JFrame based apps., however the links are still relevant in that Oracle & browser makers would not be phasing out support for applets if they wanted programmers to keep trying to shove rich client apps (e.g. Swing GUIs) into thin client web pages.
OTOH you can offer a JFrame (or a JApplet) to be launched from a link in a web page to end up free floating on the desktop of the user by using Java Web Start.
Even then, it is not a simple matter for the programmer or the end user. The programmer needs to ensure the app is digitally signed using a code signing certificate issued by a CA (usually they are expensive). The end user used to just be able to click the link, 'OK' the prompts produced by the Java virtual machine, and see the app appear on-screen. But now most browsers will download the launch file to the local file system rather than directly hand it to the JVM to be launched. So the user faces an extra step in explicitly finding the downloaded launch file and double clicking it.
This is all due to security concerns related to bugs in the plug-ins that run things in web pages. So if you were to find a way around all these hoops, please let us know. It is a security bug that requires urgent fixing.
I have some issues while using some applet in my application. It's showing that i have untrusted applet, that my jar files are not allowed to be run, showing that they are also using an old version of java (I'm using java 1.7).
Do you have any solution, like maybe using a third-pary certificate ?
Anyway, thanks for your help.
Check if this helps. You will see more details here
Setting the Security levels through the Java Control Panel
In the Java Control Panel, click on the Security tab.
Select the desired Security level.
Click Apply.
Click OK to save changes made to the Java Control Panel.
Security levels in the Java Control Panel
Very High
This is the most restrictive security level setting. All the applications that are signed with a valid certificate and include the Permissions attribute in the manifest for the main JAR file are allowed to run with security prompts. All other applications are blocked.
High
This is the minimum recommended (and default) security level setting. Applications that are signed with a valid or expired certificate and include the Permissions attribute in the manifest for the main JAR file are allowed to run with security prompts. Applications are also allowed to run with security prompts when the revocation status of the certificate cannot be checked. All other applications are blocked.
Medium (removed from Java 8 Update 20 and later versions)
Only unsigned applications that request all permissions are blocked. All other applications are allowed to run with security prompts. Selecting the Medium security level is not recommended and will make your computer more vulnerable should you run a malicious application.
The part of "Resolution" in that website said.
"Since the issue is being reported by the Java software or the Java plugin in the browser, there is nothing we can do to directly resolve the issue.
There are several workarounds possible, depending on how the site deals with browser security issues.
The most secure approach is to allow the applet to be run each time you are prompted.
If using Internet Explorer, click the [Run] button on the security warning popup window.
If using Firefox, two actions may be needed. First if the warning "This connection is untrusted" is displayed, click the "I Understand the Risks""
Please suggest, how to automate the Security Alert during execution the applications
refer the sample screens
need to click the Run Button and Allow Button from that picture, also this issues was Security checking by system, its not related to the Application, in this situation how to accept this Alert during the Execution
tries.alert.accept but its not working
-Prabu
As these prompts are from the Java Plugin rather than the browser itself, accepting them is beyond the scope of the browser automatation provided by Selenium (it's very unlikely that Oracle offers a JavaScript API to accept one of these prompts, as that would also enable malicious code to circumvent that prompt, and thereby cause a security vulnerability).
What you can try is fixing the Applet in question by providing the necessary manifest attributes, or configure the Java Plugin to permit that Applet without prompts, for instance using deployment rule sets.
I have Java 1.7 installed. We have a web site with two applets. When one of them is loaded I receive the following dialog. When the other is loaded I don't. Why is it that some applets cause this security warning and others don't?
Is there something in particular that causes this warning?
Dialog text in searchable form:
Do you want to run this application? Your version of Java is insecure and an application from the location below is requesting permission to run.
Is there something in particular that causes this warning?
Code that is not digitally signed. See Java 7 Update 21 Security Improvements in Detail .
After further investigation I discovered the cause of this warning. This is apparently a new security feature of Java 7. When you execute an applet a call is made home to Oracle to see if your Java is up to date. If it is not up to date you receive this new dialog letting you know so. The primary risk identified in the dialog is that there is a new patch for Java. If you update Java you will no longer receive this dialog until the next update comes out.
I have a simple java applet that retrieves an image from a server and prints it out. The only problem is that I get the following java security warning:
Researching on this site and all over the web, some people suggest that I sign the applet (I tried that to no avail) and others suggest that I Modify a local java security setting but that isn't feasible for my clients.
Not only do I get this warning at the start of my applet, but seemingly any time the code attempts to interact with the printer, the dialog re-appears. Also, note that there is no checkbox next to 'Always allow this applet to access the printer'. These symptoms show on any browser.
How do I get java to respect the users choice to allow it to send jobs to the printer?
You might use the JNLP API services in a sand-boxed applet in a plug-in 2 JRE. They will still prompt the user each first time they go to print, but should also put an 'always allow' check-box on the dialog (though it really only applies for that run). See a demo. of the PrintService.
See also the applet info. page that includes a link on the Next Generation in Applet Java Plug-in Technology which "..brings new abilities to applets: such as .. allowing embedded applets to gain full access to the services of Java Web Start."