Java Networking and policy file

Two part question,
First I writing a applet that is working with sockets, I've compared this and a delphi program and it seems that the delphi program is writing to and recieving from the socket at a faster rate (four second delay for the applet) then the applet. There is no extra code besides opening the client socket and writing and receiving data.
Second question is is there a way to allow an applet to write to a socket below 1024 without having a java.policy file. If I do need the policy file is there a way to change it from the applet, or to set an work around permission. I'm writing an applet to work with a protocal that generally lives on a socket below 1024.
Thanks in advance

There is a way to let an applet access the lower sockets, but you need to sign it. And in order to sign it you need a key from verisign or Thawte. In fact, there are 2 different keys you need, one for Netscape and one for MS. But the netscape one might be the only one that you need.
Other then signing it, you have to edit your browser preferences to let applets have full access to your system. sorry :(

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hi,
im looking for free (e-books) on java networking and swings any help in this regard will be appreciated
regards

try "CORE JAVA" from SunSoft press. Written by the makers of the language
themselves, it is worth every penny.
cheers.

Java Kernel and the "Unlimited Strength Java Crypto Extension Policy Files"

Is Java Kernel able to download and install on-demand the "Unlimited Strength Java(TM) Cryptography Extension Policy Files"?
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So, with Java Kernel, what's the plan? Can I hope for something better?

I believe, for US export-control reasons, the Unlimited Strength JCE policy files are never automatically downloadable by the JVM - they have to be explicitly downloaded and configured. However, you could download it yourself, configure the JVM with the policy files, create your own ZIP/JAR file and internally distribute it to your users through your intranet. But, if you do this, you are responsible for complying with the applicable export laws of your country, and perhaps, Sun licensing terms for redistributing the JVM.

Java Web Start and Policy File

Hi,
I've a problem for Java Web Start (JWS) in working with Policy File.
I like to apply a policy file for a JWS application to fine tune the secuirty setting instead of granting permission in JWS.
For an applet environment, I can apply policy file like this:
appletviewer -J"-Djava.security.policy=all.policy" writeFile.html
However, in JWS environment, I try to apply in JNLP file as below but fail:
<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+"
codebase="http://130.18.52.226:8080/testing/"
>
<information>
<title>JWS JFrame App</title>
<vendor>Java Developer Connection</vendor>
<homepage href="http://java.sun.com/jdc" />
<description>Demonstration of JNLP</description>
<icon href="hsbc.gif" width="32" height="32" />
</information>
<resources>
<j2se version="1.3*" />
<property name="java.security.manager" value="x" />
<property name="java.security.policy" value="testing.policy"/>
<jar href="testing.jar"/>
</resources>
<application-desc main-class="JWSJFrameApp" />
</jnlp>
The error message like this:
Java Web Start Console, started Tue Sep 03 09:59:36 CST 2002
Java 2 Runtime Environment: Version 1.3.0 by Sun Microsystems Inc.
java.security.AccessControlException: access denied (java.util.PropertyPermission java.security.manager write)
java.security.AccessControlException: access denied (java.util.PropertyPermission java.security.policy write)
Could anyone please help on this!
Many thanks!
Regards,
Simon Ho

There are two problems with what you are trying to do.
First, setting a property PROP=VALUE in the jnlp file does not mean that java will be launched -DPROP=VALUE, instead, javawebstart will call System.setProperty(PROP,VALUE) before your apps main() is called. The difference is, the property will not be set at the time the VM is initialized.
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How to create a custom java client Security Policy File?

I have a stand-alone java client which invokes a .NET WSE 3.0 enabled web service. The web service SOAP header requires username token to be passed from my java client.
Could some one kindly provide a sample of a client-side Security Policy File?
Your help is very much appreciated.
Mike

This is still a workaround...
But if you put checks on all your forms to see if the user has accepted the terms (assumes there is an attribute tracking this) then you can redirect the user to the terms/conditions forms. Still not spoof-proof, but it would be bookmark proof. (and a pain if you have too many forms)

Security Manager and Policy Files

Hi all,
I am writing a simple java rmi application, but understand it wont run without a Security Manager installed and a policy file.
I think I have installed the security manger using the following in the main() method of my client application:
System.setSecurityManager(new RMISecurityManager());However I am unsure how to use a policy file with this. I have looked on the internet, but it does not seem to be very well documented
Please could you advise me how to create a policy file that will work for my application and where to place it in my application so that my application can use it.
Any help would be greatfuly appreciated
Thanx
Aaron

An RMI application doesn't need a security manager unless you are using the codebase feature.

Help needed about HTTPS and policy files !!

Hi everyone,
my Web Start application crashes with a SSLPeerUnverifiedException when I
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// proxy settings
HTTPConnection.setProxyServer(ipProxy, portProxy);
// connection
HTTPConnection con = new HTTPConnection("https", serverName, -1);
// Post (then there is a SSLPeerUnverifiedException....)
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My application runs in a secure environnement configured by the javaws.policy :
grant codeBase "file:${jnlpx.home}/javaws.jar" {
permission java.security.AllPermission;
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permission java.security.SecurityPermission "putProviderProperty.JCRYPTO";
permission java.security.SecurityPermission "putProviderProperty.JCRYPTO_PKCS11";
permission java.security.SecurityPermission "removeProviderProperty.JCRYPTO";
permission java.security.SecurityPermission "removeProvider.JCRYPTO";
permission java.security.SecurityPermission "removeProvider.JCRYPTO_PKCS11";
permission java.security.SecurityPermission "removeProvider.SUN";
permission java.util.PropertyPermission "*", "read,write";
permission java.io.FilePermission "<<ALL FILES>>", "write,read,delete";
permission java.net.NetPermission "specifyStreamHandler";
permission java.net.SocketPermission "localhost:1024-", "listen";
permission java.net.SocketPermission "*", "connect,accept,listen,resolve";
permission java.awt.AWTPermission "accessClipboard";
permission java.lang.RuntimePermission "queuePrintJob";
permission java.lang.reflect.ReflectPermission "suppressAccessChecks";
permission java.awt.AWTPermission "showWindowWithoutWarningBanner";
grant codebase "file:/myApplication/-" {
permission java.security.AllPermission;
In this file (.java.policy) when I replace "codebase "https://xxxxxxxxxxxxxxx/-""
by "codebase "http://xxxxxxxxxxxxxxx/-"" everything works fine !! It's very very
very very strange...
my application is launched by Web Start 1.2 and use JRE 1.4.1
Any ideas ? Please, I become crazy...

In this file (.java.policy) when I replace "codebase
"https://xxxxxxxxxxxxxxx/-""
by "codebase "http://xxxxxxxxxxxxxxx/-"" everything
works fine !! I am not so sure that a code source cares for whether the resource is downloaded with s-http or normal http. Is the distinction important for the policy file?
You could go digging in the RFC that describes what a URL is (because that is what the code source is).
Also you could switch on a nice flag in you server environment that output information if security things go wrong: -Djava.security.debug=failure
In the output you should see from where your code is loaded. If it says http and not https, then that is what should appear in your policy file.

Timestamp in Java log and trace files.

Hi SAP'ies
Running PI 7.11 on AIX 6.3 we face an issue with the content of log and trace files from Java.
Eg.
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Hello All
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"The file [name of file] may have been changed by another user since you last saved it." Issue affects both network and local files.

When a certain user saves a file in Excel 2010, she gets a message: "The file <name of file> may have been changed by another user since you last saved it." She can choose to save as another file or overwrite with her changes.
This just started happening a week or so ago. She was concerned that someone else was accessing her files, but we did several tests that opened, made a change and saved in a matter of seconds, and she still gets the message. It happens on
most files, but not all – both network and local.
We already tried the QFE_Saskatchewan registry fix. I also checked the file server for Services for Macintosh.

You may be confused by the error in Excel saying “another user”. Actually Excel cannot tell who (the real human) is editing the file. Based on my research the No.1 possibility of the error is KB2626998.
2626998 Connection to a network document is lost in the 2007 Office system or in Office 2010 after the computer resumes from standby
http://support.microsoft.com/kb/2626998
For Excel 2010, follow these steps:
a. Click Start , click Run , type regedit in the Open box, and then click OK .
b. Locate and then select the following registry subkey: HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Excel\Options
c. On the Edit menu, point to New , and then click Dword Value .
d. Type NetworkAvailableTimeInSeconds , and then press Enter.
e. Right-click NetworkAvailableTimeInSeconds , and then click Modify .
f. In the Value data box, click Decimal , type a number value, and then click OK .
Note This registry subkey sets the time, in seconds, that Excel waits for the network to resume. For example, if you type 15 for the number value, Excel waits 15 seconds for the network to resume. You might have to do some tests in your own environment to
determine an appropriate value. You may have to try multiple numbers.
g. Locate and then select the following registry subkey.
HKEY_CURRENT_USER\Software\Microsoft\office\14.0\common\Internet
h. Repeat step 2C through step 2F again. Reuse the same value that you used previously.
i. Exit Registry Editor.
Feel free to post back. Thanks.
Cheers,
Tony Chen
Forum Support
Come back and mark the replies as answers if they help and unmark them if they provide no help.
If you have any feedback on our support, please contact
[email protected]

Java script and css files are not loaded

I am using 9iAS 1.0.2.2.2a on Windows Server Family 2000. My web application is using bc4j and developed in JDeveloper 3.2. I am also using Apache and web cache and caching js and css files.
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Some times loads css files but does not load js files.
Some times does not load js and css files.
& some times loads both types of files.
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looks like you have a sandboxed iframe on your page.
the first step in troubleshooting IE issues is to test in noAddons mode.
Rob^_^

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No. If you want to do that you should just use Access. mySQL files will not work without the mySQL server.

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You went to a class and they didn't teach you the answers to these questions? I say go and get your money back: you we're ripped off.
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Java Networking and policy file

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