How to Randomfile access Non-Signed Applet?

How to access a file with RandomFile Access with a non-signed Applet?
Similar to this but with Random Seek,Read, Write.
BufferedReader inData = new BufferedReader(new InputStreamReader(home.openStream()));
Thank you

Have you looked at
http://java.sun.com/docs/books/tutorial/essential/io/index.html

Similar Messages

Display of certificate when accessing a signed applet

HI
I have a signed applet which obviously displays a Certificate whenever it is Accessed.Now i would like the certificate to be displayed only once ie. ONLY when the applet is accessed for the first time and the user accepts(trusts) the certificate.The next time the user access the applet i do
not want the certificate to be displayed again as he has already accepted (trusted)the certificate.
is there a way to do this?
best regards
sumesh

Your user must import your certificate and store it as a trusted CA -- see step #9 on the link shown below:
http://developer.java.sun.com/developer/qow/archive/167/index.jsp
V.V.

Filesystem access with signed applet?

Is signing an applet enough to read-access the client filesystem?
I found webpages that said, signing the applet is sufficient while other webpages say you still need policy-files.

Hello, there is more suitable solution for webpage application then is JFileUpload. Here, watch this video on youtube: http://www.youtube.com/watch?v=wqpwyAAhKGg . Java Applet is hidden controlled by JavaScript!

OS X 10.5.6, Safari 3.2.1 hangs when second applet loaded is signed applet

Dear Forum,
I've been investigating a customer's problem. She is trying to use our
VoIP applet, but it continuously freezes Safari when the Trust dialog shows.
A "Force Quit" is necessary.
I managed to reproduce the problem consistently on
- PowerMac7 OS X 10.5.6 (Build 9G55)
- Architecture: ppc
- Safari 3.2.1 (5525.27.1)
- JVM 1.5.0_16 from Apple
The problem is persistent when:
- the signed applet is loaded as second applet in the browser
- the signed applet is cached by the JVM
Our customer uses:
- Mac Book ProOS X 10.5.6
- Safari 3.2.1
- JVM 1.5.0_16 from Apple
This problem does not occur on:
- Mac OS X 10.4.11 (Mac Powerbook G4)
- Safari 3.2.1 (4525.27.1)
- JVM 1.5.0_16 from Apple
and not on:
- MacBook Air, OS X 10.5.6, 1.6 Ghz Intel core 2 duo
- Safari Version 3.2.1 (5525.27.1)
- JVM 1.5.0_16 from Apple
Steps to reproduce the problem:
Launch Safari.
In (first) page/tab go to
http://www.javatester.org/version.html
(this uses a non signed applet)
Open a second tab. Here go to:
http://ukapi.phonefromhere.com/talk/vtop2.xsql?key=01612884242
This is a signed applet that will ring our office over VoIP.
Click the "Trust" button (signed by PhoneFromHere).
As long as this applet isn't cached by the JVM this will work, so
the first time you will succeed.
Now Quit Safari (not "just" close all Safari windows, but a "real" quit) and repeat the exercise.
The second (and next) time this will fail (only if the signed applet is loaded as second, so the order is important)! This keeps failing until I go (back) to the Java Preference window (via Finder) and explicitly delete the cached files.
The URL will work when loaded first (cached or not).
Some diagnostics, that might help:
I configured the Java Preference window to "enable Logging, Tracing and Show applet livecycle exceptions".
When the applet fails to load (and Safari freezes/hangs), the last few records of the plugin150.log are:
<message>basic: Loading http://ukapi.phonefromhere.com/talk/lib/pfh.jar from cache
<message>basic: Reading cached JAR file from JRE 1.5 release
<message>basic: Certificates for http://ukapi.phonefromhere.com/talk/lib/pfh.jar is read from JAR cache
<message>security: Loading certificates from Deployment session certificate store
<message>security: Loaded certificates from Deployment session certificate store
<message>security: Checking if certificate is in Deployment session certificate store
(and then nothing)
whereas when it succeeds to load, as soon as I click the "Trust" button, it's say:
<message>security: User has granted the priviledges to the code for this session only
The Report is a bit too long to port, I'll include the same text above when sending it.
Model: PowerMac7,2, BootROM 5.1.3f0, 2 processors, PowerPC 970 (2.2), 1.8 GHz, 2 GB
To cut a long story short? Is this a know bug (I couldn't find anything, but you never know)? Does anyone have any ideas how to fix this?
Thanks, Birgit

I have the same issue now after downgrading my Flash plugin. I downgraded from 10 to 9 latest because I like using Camino and for some reason Flash 10 doesn't play nice with Camino. But all of a sudden as I use Camino 2b2 for everyday and Safari 3.2 for banking and such, the browser hangs requiring a forced quit when I close it. I've re-installed the browser twice now with all the previous folders, and preferences erased and caches emptied. I even when to re-installing 10.5.6 and it still crashes, it's odd. Maybe 10.5.7 will address this.

Main accessing non static members

How can main access non static members itself being static?

Why would you want to?
Main has one purpose and one purpose only, it is there for kicking off a program and ensuring it closes cleanly. I know they generally don't teach this early on in programming classes, but in my opinion they should.
You should never ever be doing any data processing in main. In some cases you may need to set data in main, like for example if the class the main is in is part of a larger project but you want to be able to test the class stand-alone without having to run the rest of the project. But in most cases main should do nothing with any data save the args, which should usually just be passed along.
The reason behind this is simple, soon enough you will be writing programmes that span multiple class objects, only the main of the class you use to kick it off ever gets touched, so any data processing that is in the other classes main methods, never happens.
Why you should learn how to get out of main now is, you may want to use the class you are writting now as part of a future project. But again you have the problem of unless this class is the one that kicks that project off, any processing in main does not happen. Plus what happens if you want to process the data in you are processing in main somewhere else? Code re-use of code in main is a no go.
Plus, by getting out of main you no longer have to worry about that whole static/ non-static issue.
JSG
Sorry, this is just one of my pet-peeves

Access denied to a security provider on a signed applet

Hi,
I'm having permissions problems to work with a security provider.
The security provider is already installed at java.security. In fact, at Netbeans when debbuging the app it's working perfectly.
If I'm working the provider in an signed applet, then there are errors.
Even, I have created a .jar file and I have saved in the /ext directory, wich by default in the java.policy file has got all security permissions.
grant codeBase "file:${{java.ext.dirs}}/*" {
permission java.security.AllPermission;
Even with these granted permissions, I'm getting problems to work with the security provider that I have installed. Also, with these permissions I should be able to install the security provider.
log:
<record>
<date>2012-03-13T12:13:39</date>
<millis>1331637219126</millis>
<sequence>17</sequence>
<logger>appletpdf.appletPdf</logger>
<level>SEVERE</level>
<class>appletpdf.appletPdf</class>
<method>applTest</method>
<thread>11</thread>
<message>excepcion: {0} </message>
<exception>
<message>java.security.AccessControlException: access denied (java.security.SecurityPermission authProvider.SunPKCS11-Provider-name)</message>
<frame>
<class>java.security.AccessControlContext</class>
<method>checkPermission</method>
<line>393</line>
</frame>
<frame>
<class>java.security.AccessController</class>
<method>checkPermission</method>
<line>553</line>
</frame>
<frame>
<class>java.lang.SecurityManager</class>
<method>checkPermission</method>
<line>549</line>
</frame>
<frame>
<class>net.sourceforge.jnlp.runtime.JNLPSecurityManager</class>
<method>checkPermission</method>
<line>250</line>
</frame>
<frame>
<class>sun.security.pkcs11.SunPKCS11</class>
<method>login</method>
<line>1036</line>
</frame>
<frame>
<class>sun.security.pkcs11.P11KeyStore</class>
<method>login</method>
<line>874</line>
</frame>
<frame>
<class>sun.security.pkcs11.P11KeyStore</class>
<method>engineLoad</method>
<line>764</line>
</frame>
<frame>
<class>java.security.KeyStore</class>
<method>load</method>
<line>1201</line>
</frame>
<frame>
<class>apppdf.appPdf</class>
<method>tPKCS11</method>
<line>174</line>
</frame>
<frame>
<class>appletpdf.appletPdf</class>
<method>applTest</method>
<line>137</line>
</frame>
<frame>
<class>appletpdf.appletPdf</class>
<method>initapplDPdf</method>
<line>116</line>
</frame>
<frame>
<class>sun.reflect.NativeMethodAccessorImpl</class>
<method>invoke0</method>
</frame>
<frame>
<class>sun.reflect.NativeMethodAccessorImpl</class>
<method>invoke</method>
<line>57</line>
</frame>
<frame>
<class>sun.reflect.DelegatingMethodAccessorImpl</class>
<method>invoke</method>
<line>43</line>
</frame>
<frame>
<class>java.lang.reflect.Method</class>
<method>invoke</method>
<line>616</line>
</frame>
<frame>
<class>sun.applet.PluginAppletSecurityContext$4</class>
<method>run</method>
<line>699</line>
</frame>
<frame>
<class>java.security.AccessController</class>
<method>doPrivileged</method>
</frame>
<frame>
<class>sun.applet.PluginAppletSecurityContext</class>
<method>handleMessage</method>
<line>696</line>
</frame>
<frame>
<class>sun.applet.AppletSecurityContextManager</class>
<method>handleMessage</method>
<line>69</line>
</frame>
<frame>
<class>sun.applet.PluginStreamHandler</class>
<method>handleMessage</method>
<line>273</line>
</frame>
<frame>
<class>sun.applet.PluginMessageHandlerWorker</class>
<method>run</method>
<line>82</line>
</frame>
</exception>
</record>
Fails in the line where the KeyStore is loading:(Pin is correct)
KeyStore myKeyStore=null;
Provider p = Security.getProvider("SunPKCS11-Provider-Name");
myKeyStore = KeyStore.getInstance("PKCS11",p);
char[] pinData = pin.toCharArray();
myKeyStore.load(null, pinData);
Any help would be apreciated.
Thank you.
Bye

Thank you for your information, Frank, as it clarifies part of my confusion. However, there are a couple more loose ends I'd love to address before I mark your responses as answers.
Do backup and restore privileges apply at all over a network mount created via "net use"?
The network mount requires a username and password for the destination machine. Assuming the destination machine is a Windows box with a simple CIFS share, how does this user affect our permissions and access? Do we end up effectively impersonating this
user, or is the access check still done with our sync process's run-as user?
We require that both our configured run-as user for our sync process *and* the credentials passed to the network mount be administrator users of the local system and destination system, respectively, meaning they're in of the "BUILTIN\Administrators,
S-1-5-32-544" group.
On re-syncs, the destination file will exist and since we don't have the ability to read the ACL in all cases (we're running as one user, the file is owned by another user, and we aren't specified in the ACL in any way), we aren't able to determine if the
file has changed. Is it possible to determine the owner of this file in this case? Preferably, we'd obtain the entire SDDL.
My proposed plan is to interpret access denied as a difference requiring re-sync, resulting in us taking ownership of the file, granting ourselves access, determining if there are data differences, and then re-syncing the metadata as appropriate.

Java.security.AccessControlException: access denied; for a signed applet

Hi,
I have a signed applet which is used to read local files. When I call the applet method which is reading the file, from javascript I am getting "java.security.AccessControlException: access denied ". Where as if the method gets called during applet load, file is read without errors? How can I get over this problem?
If there is a way loading the applet based on a condition from Javascript, please let me know.
Thanks,

[http://forums.sun.com/thread.jspa?forumID=421&threadID=5308353]

How to develop signed applet

Hello Friends
I am working on chat application using applet.
But simple applet throw exception for different database server than application server.
So how can solve this problem ?
Is Signed Applet a solution ?
If yes how to develop signed applet ?

Hello Friends
I am working on chat application using applet.
But simple applet throw exception for different
database server than application server.
So how can solve this problem ?Best by not letting your applet access the database, and letting the application server do that instead.
Is Signed Applet a solution ?Yes.
If yes how to develop signed applet ?http://www.google.com/search?hl=en&q=how+to+sign+an+applet

How to allow access to winrs for non-admin user?

I have Windows Server 2012 (and Server 2008, but it is next priority) to monitor it using txwinrm. txwinrm library internally is using WinRS protocol. I have to monitor it using least privileged user, but don't know how to configure access for him.
All I managed to do - is to configure remote Powershell session for my user, but it's look like that winrs and powershell sessions have different security descriptors:
Invoke-Command -ComputerName 192.168.173.206 -Credential (credential Administrator $pwd) -ScriptBlock { 2 + 2}
# gives 4
Invoke-Command -ComputerName 192.168.173.206 -Credential (credential lpu1 $pwd) -ScriptBlock { 2 + 2}
# gives 4
winrs -r:192.168.173.206 -u:Administrator -p:$pwd 'powershell -command "2+2"'
# gives 4
winrs -r:192.168.173.206 -u:lpu1 -p:$pwd 'powershell -command "2+2"'
# Gives Winrs error: Access is denied.
Configuration for my user is following:
(Get-Item WSMan:\localhost\Service\RootSDDL).value
# O:NSG:BAD:P(A;;GA;;;BA)(A;;GA;;;S-1-5-21-3231263931-1371906242-1889625497-1141)S:P(AU;FA;GA;;;WD)(AU;SA;GWGX;;;WD)
(Get-PSSessionConfiguration -name Microsoft.Powershell).SecurityDescriptorSddl
# O:NSG:BAD:P(A;;GA;;;BA)(A;;GA;;;S-1-5-21-3231263931-1371906242-1889625497-1149)S:P(AU;FA;GA;;;WD)(AU;SA;GXGW;;;WD)
(In each security descriptor my user is given general access to protected object).
So what security descriptor should I set to make my winrs query work for non-admin user?

Hi Bunyk,
I can not recreate the erroe you posted, and please also post the screenshoot in your convenience.
I tested with a non-domain user but has the local admin permission of the remote computer, and this worked, before running the remote cmdlet in powershell, I also configured the TrustedHosts.
In addition, the access denied could be also caused to the Protocol Filtering on the remote server, for more detailed information, please refer to this thread:
winrs error:access is denied
I hope this helps.

How do you connect your photoshop elements on your computer to your account online? and how do you create a customized url? how does the gallery work and how do you access it? i have trouble signing in on my program from my computer to connect to the onli

how do you connect your photoshop elements on your computer to your account online? and how do you create a customized url? how does the gallery work and how do you access it? i have trouble signing in on my program from my computer to connect to the online photoshop, and I really want to create my own customized url and post photos to my gallery and share them with the world, family, and friends, but i need help because i can't figure how to do any of this, would really appreciate feedback and assistance, thanks, - claire conlon

To add to sig's reply, "calibrating" does not calibrate Lithiu-Ion batteries, it calibrates the charge reporting circuitry. If you look at the effect of deep discharging Lithium-Ion batteries in the data from the independent test group, Battery University, you will see that doing so shortens the life of the battery significantly. It looks like an optimum balance between use and life is at a discharge level of 50%.

I brought up my itunes through a friends laptop. I signed out thinking I could get on my home computer and still have my iTunes accessible, how do i access them from this computer? HELP

I brought up my itunes through a friends laptop. I signed out thinking I could get on my home computer and still have my iTunes accessible, how do i access them from this computer? HELP

Copy everything from the old computer or your backup copy of your old computer, to your new one.

File read access denied for signed applet

Hi:
I have a signed applet with a certificate generated with the keytool. Yet, I keep getting this error:
java.lang.Exception: java.security.AccessControlException:
    access denied (java.io.FilePermission C:\WINDOWS\system32\aetpkss1.dll read)The error is produced when the method loadKeyStore(pin) below is called.
    private KeyStore ks;
    private Provider provider;
    private static final String providerName    = "PKCS11";
    private static final String providerLibrary = "aetpkss1.dll";
    public void loadKeyStore(String pin) throws IOException,
     CertificateException, KeyStoreException, NoSuchAlgorithmException {
     if (provider == null)
         registerProvider(providerLibrary);
     try {
         ks = KeyStore.getInstance(providerName,provider);
     } catch (Exception e) {
         throw new KeyStoreException("Failed get keystore instance\n"
                         + e.getMessage());
     try {
         ks.load(null, pin.toCharArray());
     } catch (Exception e) {
         throw new KeyStoreException("Failed load keystore\n"
                         + e.getMessage());
    public void registerProvider(String library)
     throws FileNotFoundException, KeyStoreException {
     String fileName;
     if (new File(library).isAbsolute())
         fileName = library;
     else
         fileName = getAbsolutePath(library);
     if (!(new File(fileName).exists()))
         throw new FileNotFoundException("No such file: " + fileName);
     String config = "name = " + providerName + "\n"
         + "library = " + fileName;
     ByteArrayInputStream confStream =
         new ByteArrayInputStream(config.getBytes());
     try {
         provider = new sun.security.pkcs11.SunPKCS11(confStream);
         Security.addProvider(provider);
     } catch (Exception e) {
         throw new KeyStoreException("Can initialize " +
                         "Sun PKCS#11 provider. Reason: " +
                         e.getCause().getMessage());
    private String getAbsolutePath(String lib) throws FileNotFoundException {
     String[] searchPath;
     /* NOTE: This should be modified to suit different versions of   *
      *       Windows and not just Windows XP                         */
     if (System.getProperty("os.name").matches("^(?i)Windows.*")) {
         searchPath = new String[] { "C:\\WINDOWS\\system32" ,
                         "C:\\java" };
     } else {
         searchPath = new String[] { "/usr/local/lib/" };
     for (int i = 0; i < searchPath.length; i++) {
         if ((new File(searchPath[i] + File.separator + lib).exists()))
          return (searchPath[i] + File.separator + lib);
     throw new FileNotFoundException("Library not in search path " + lib);
    }The above code is called by a java script, the class' constructor is empty.
The error appears not to be caught by my code. I have tried to insert try/catch statements everywhere to figure out where this error is produced.
The code is write off of the applet for signing with a smart card by Svetlin Nakov - and his applet works!
I have also made a CLI application that uses the above code and it works perfectly.
So: Something is wrong either with my certificate, the signing method, signature verification or something completely different. Any hints?
The certificate I generated with
keytool -genkey -keystore mystore -alias me
keytool -seflcert -keystore mystore -alias meI have tired both with and without the selfcert step.
Thanks! Erik

The problem has been identified: Placing registerProvider() in the constructor the error no longer occurs, instead an error is produced when the key store is loaded.
It appears that the javascript code is not trusted and so, even though the applet is signed, access privileges are restricted to those of the java script.
A solution to this problem is not clear, but possibly, serving the pages from a trusted server, the java script will be trusted, some documentation seem to indicate.

How to resolve problems in policy file of signed Applet

Hi to All,
I want to connect the web site through my Signed Applet which is working as a Proxy server. but i m facing certain problems in my policy file:
this is my policy file :-
grant {
permission java.security.AllPermission "", "";
permission java.net.SocketPermission "http://www.google.com:4321", "connect, accept,resolve";
permission java.security.UnresolvedPermission;
n i got such type of exceptions n my Applet prompt applet not initialized.
Got connection Socket[addr=/192.168.1.232,port=1200,localport=4321]
Reading request...
URI is: http://www.google.com/
Host to contact is: www.google.com at port 80
Got request...
java.security.AccessControlException: access denied (java.net.SocketPermission www.google.com resolve)
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:264)
at java.security.AccessController.checkPermission(AccessController.java:427)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
at java.lang.SecurityManager.checkConnect(SecurityManager.java:1031)
at java.net.InetAddress.getAllByName0(InetAddress.java:1117)
at java.net.InetAddress.getAllByName0(InetAddress.java:1098)
at java.net.InetAddress.getAllByName(InetAddress.java:1061)
at java.net.InetAddress.getByName(InetAddress.java:958)
at java.net.InetSocketAddress.<init>(InetSocketAddress.java:124)
at java.net.Socket.<init>(Socket.java:179)
at ProxyApplet.handle(ProxyApplet.java:75)
at ProxyApplet.<init>(ProxyApplet.java:132)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at java.lang.Class.newInstance0(Class.java:350)
at java.lang.Class.newInstance(Class.java:303)
at sun.applet.AppletPanel.createApplet(AppletPanel.java:721)
at sun.applet.AppletPanel.runLoader(AppletPanel.java:650)
at sun.applet.AppletPanel.run(AppletPanel.java:324)
at java.lang.Thread.run(Thread.java:595)
here 4321 is Port no. which i've as a random port no.
plz Help
thnx in advance
with regards
pank_naini

Please, if you can't help me, could you tell me who can I contact ?

How to run java signed applet in vista with changing IE security options

how to run java signed applet in vista with changing IE security options. If i change the IE security settings to low. it works.
without changing the security setting, how to run.

j_nanaji9 wrote:
how to run java signed applet in vista with changing IE security options. If i change the IE security settings to low. it works.
without changing the security setting, how to run.Can't be done without changing the security setting.

NIGHTMARE! Signed Applet - No Access. Please Help.

Hi:
I'm trying to make a signed applet gain access to my directory structure.
I created a simple applet to test with one line:
sErr = System.getProperty("user.dir");
The code is below.
I sign it using the following:
keytool -genkey -keyalg rsa -storepass MyCerts
As you can see I'm using the default keystore but I've tried it by using -keystore MyKeystore too.
It runs me through all the questions which I answer, no problems.
Then I sign it:
jarsigner -signedjar SSignedApplet.jar SignedApplet.jar MyCerts
It asks for the passwords which I enter.
It completes without error and the SSignedApplet.jar file shows up in the directory.
If I open the signed jar file it has all 3 of the files in the META-INF folder and the Manifest file looks right to me.
I upload the jar and the Default.asp file to a Web server (I've tried localhost and a remote host).
I open the page and the pop up comes up asking if I want to trust the unverified applet. I click 'Run'.
Once the applet is 'Started' I click the 'Get Properties' button and I get the error:
access denied (java.util.PropertyPermission user.dir read)
I've tried 2 examples that work fine on my machine (that I didn't write).
The first is by Francois Orsini (Derby Demo) and the other is by Laura MacDougal (successfully wrote a file to my user.dir directory).
No matter what I do, I can't sign an applet and make it access anything.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html lang="en-US">
<head>
<script language="JavaScript" type="text/javascript">

</script>
</head>
<body bgcolor="#ffffff" style="margin:0px auto;width:800px;padding:0px">
<form name="fmLogin" action="" method="POST">
<table width="650" align="center" cellpadding="0" cellspacing="0">
     <tr>
          <td>Login</td>
          <td><input name="Login"></td>
     </tr>
     <tr>
          <td>Password</td>
          <td><input name="Password"></td>
     </tr>
     <tr>
          <td colspan="2"><input type="button" onclick="getProp();" value="Get Property"></td>
     </tr>
</table>
</form>
<APPLET CODE="SignedApplet.SampleApplet.class" WIDTH=1 HEIGHT=1 NAME="SampleApplet" ARCHIVE="SSignedApplet.jar"></APPLET>
</body>
</html>
package SignedApplet;
import java.applet.*;
import java.io.*;
import java.util.*;
public class SampleApplet extends java.applet.Applet {
    public String sErr = "";
    public void init() {
        // TODO start asynchronous download of heavy resources
    public void getProp()
        try
            sErr = System.getProperty("user.dir");
        catch(Exception exp)
            sErr = exp.getMessage();
    // TODO overwrite start(), stop() and destroy() methods
}

Thank you for reading my reply in your other thread:
http://forum.java.sun.com/thread.jspa?threadID=762212&messageID=4368224#4368224
If you've really run through it you would have known that code called from
javascript is not trusted and you have to use doprivileged (hey its in bold...
why would that be?).
Call getProp from init within the applet and you've got no problem.
As for your imageIcon, creating one with string as a parameter
the string is used as input for a File. I had no problem loading one with a signed applet.
I'll post the example later in your other thread.

How to Randomfile access Non-Signed Applet?

Similar Messages

Maybe you are looking for