Change Java Security Settings
Dec 8, 2014
I have made a very simple Java applet.
<HTML>
<BODY>
<CENTER>
<APPLET CODE="HelloWorldApp.class" WIDTH="862" HEIGHT="512"></APPLET>
</CENTER>
</BODY>
</HTML>
But when i try to open it i get the message: Application Blocked. Click for details.
- The list i see doesn't work
- If i click Ignore nothing happens
- If i click reload nothing happens
When i read and search the net i have to change my java security settings. The security setting are HIGH and i cannot change that.But i can fill in an Exception Site List...The hello.html file is on my NAS : file:///X:/Lantronix/hello.html..I fill this in the exception Site list -> I get a message that it is a security risk to add this location.
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May 19, 2014
Any way to get my Java window to open with a certain width and height. I've been googling and haven't found to much valuable information. Here is what I have so far.
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
public class JavaWindow{
//Bring up the frame.
private JFrame f = new JFrame("JavaWindow");
[Code] ....
When you compile that it runs a small window. I would like that window to be bigger when the file opens.
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Apr 14, 2014
I have a major problem. the text size is like 6 or 8 pt font and I can't read it. I'm trying to run a downloaded exe program which uses the jre7 which I had to download beforehand. the font size stays at 6 or 8 even if I try to change it in windows settings. it's a high res monitor on a lenovo yoga laptop. is there a way for me to edit the java code and manually change the font size?
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Sep 12, 2014
I have tried running the java application without adding the site to site list in java security tab. But I get a sand box message as APPLICATION BLOCKED BY SECURITY SETTINGS. How to run the java application without adding the site to site list in java security tab.
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Jun 3, 2015
I wanna run apps using an outdated version of Java and not have it stop me for security certificates.
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Jul 10, 2012
I have been trying to find all day long a way to secure my .ear file from modifications made by third parties... My product is packaged as an .ear file which i send for deployment to other administrators. What i am looking for is a way to "sign" my version of .ear versus the deployed version of .ear to be sure that no modification has been made to my code...
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Sep 12, 2014
I have been recently been working on a library to handle loading and saving settings in a Java application using annotations. Here is how the library is used currently:
package main;
import dhuk.settings.main.SettingsManager;
import dhuk.settings.main.SettingsTarget;
public class Main{
public final String keybinds = "keybinds.txt", settings = "settings.txt"; // Constant strings to be used as the file's paths
SettingsManager sm = SettingsManager.instance; // Singleton used to manage all of the settings files.
[Code] .....
Here is a link to my bitbucket repository: Click Here
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Feb 26, 2014
I have a simple applet that doesn't stray outside the sandbox. It used to work fine before Java 7 but now it craps out with security warnings. It does nothing but play a game, it doesn't even save the state of the game. This is the applet, it's a very simple chess program.
The warnings and popups I'm getting are:
activate javaTM platform SE 7U?allow now?activation blocked by security settings - I never changed any security settings and as I said, this applet stays firmly in the sandbox so I can't see what the issue is.Viewing the java error window I see
Java Plug-in 10.51.2.13
Using JRE version 1.7.0_51-b13 Java HotSpot(TM) Client VM
User home directory = C:UsersMike
----------------------------------------------------
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
[code]....
why it shows the C:UsersMike directory in the above listing, there is no access to files etc.The applet plays fine if I run it in appletviewer.What do I need to do to make this simply work in anyone's browser? I have a similar problem with a (rather funky) Connect 4 program I wrote. It worked fine for years and then just stopped with the Java 7.
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Jan 29, 2015
I know that Servlets are meant to do the JDBC tasks, JSP are only for displaying the final information forwarded by the Servlet.
JSP are Servlets too, but I heard an idea that it is safer to make database operations in a Servlet.
The idea is that I have a few JSP that use JSTL tags to retrieve some database information. By doing this I was concerned that this may be bad design, though I really wanted to get in fit with the JSTL tags.
Are there any security weaknesses if doing some JDBC stuff in a JSP, by using JSTL or plain Java code in <%...%>?
P.S. In my JSP I only retrieve data, not modifying it.
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May 12, 2014
I have JSP application naming myProject ,which has been deployed in webapp folder in tomcat. I want to provide security for myProject folder. I mean, I want to protect it from copying by someone else. Is there any way to do the same. I tried by hiding the folder using one of hiding software, but when I do that, I was not able to access those files in web browser.
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Nov 13, 2014
I've been building out a course lab project over the last few weeks, and at the time (with what we knew), it made sense to use a session level ResourceBundle to facilitate translations.
In order to validate if there is a session level ResourceBundle, I have a filter running (checking if the bundle exists, creating one if not, etc...).
The problem I now have is the final step of the project (the part most recently taught), is to add Declarative Security.
Of course, when that happens the login.jsp is called and the Filter doesn't run. It's not a problem for most scenarios, except for someone who bookmarks a link inside the secure part of the site. Then, the ResourceBundle doesn't exist and the login.jsp content that should be translated is "".
Is there a way to indicate via the web.xml that a specific Filter should be allowed before the login.jsp is displayed?
I imagine JSTL:FMT is probably the best solution, but we don't cover that until after the lab is due. I have a (messy) short-term solution of creating a temporary ResourceBundle in the login.jsp via a scriplet if the session scope ResourceBundle is null, but I was wondering if I missed something with the web.xml.
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Feb 12, 2014
I am using AES/CBC/PKCS5Padding algorithm to encrypt/decrypt, it works fine across machines, since i am not using a Facrtory to create the secret . I am using constant SecretKeySpec and iv for the ciphers. This of course heart the security , and doesn't prevent the "man of the middle" problem .
I saw that there are ways with key generation with MAC , and RSA symmetric encryption , but i am not sure how to implement it , and how to it depends on local certificates or files .
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Oct 6, 2014
I have an FX application which invokes a REST JSON webservice. It works perfect if I run it standalone. But if I try to run it over browser, it throws java security exception.
It also works fine in web if I comment some lines that invokes the webservice (code that calls the webservice using jackson.)
Java version used is JDK 1.7u67
IE plugin version : 7.0.670.1
Error log :
java.security.AccessControlException: access denied ("java.lang.RuntimePermission" "accessDeclaredMembers")
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
[Code] .....
Jnlp File:
<?xml version="1.0" encoding="utf-8"?>
<jnlp spec="1.0" xmlns:jfx="http://javafx.com" href="uibuilder.jnlp">
<information>
<title>UI Builder</title>
<vendor>javafx.com</vendor>
<description>XEye UI Builder</description>
[Code] ....
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Dec 21, 2014
I have several Windows 7 Enterprise machines that have already been deployed via image and need to lower the security settings for use on internal web based applications.
Is there an easy way to manipulate the configuration (a file) so that I may simply make the changes by overwriting the current configuration settings instead of, having to go to each device, opening the Java console, and changing the security settings that way?
I have attempted to login as the machine administration, make the changes on the Java console with the hopes this configuration would have migrated to all user profiles that log into the PC. Is there a "public profile" configuration file I can change and if so, what should I do.
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Dec 15, 2014
I need to write a simple client to access a WS. Things I can not do :
Modify the serverAdd external jars
The client will be part of a command line call and will run as a stand alone.
I've been searching all day and have found hundreds of vague, overly complex examples, mostly based on SOAPHandler (which tells me I need to install server components which I cannot do). I grasp the general requirements but am having difficulty figuring out how to add the security elements to the header.
What do I need to do to add the username and password tokens to the header?
This is where I am so far.
package findingLetter;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.xml.namespace.QName;
import javax.xml.soap.MessageFactory;
[Code] ....
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Apr 10, 2014
I have been trying to implement a alphanumeric security code in JAVA. Here are my specifications:
1) Numbers and letters
2) There is user input
3) In the format of NNN-LL-NNNN where N=Numbers and L=UPPERCASE letters
4) If it is incorrect print out INVALID CODE
5) If it is correct print out VALID CODE
Here is what I have produced so far...
import java.util.*;
import java.io.*;
//Class Declaration
class WorkingWithStrings
{
//Main Method
public static void main(String[] args)
{
//Takes input from user
[Code]...
I have taking the approach of invoking a separate method that will check the validity of the security code. However I am having an issue with creating a statement that checks if the middle two characters of the security code are capital letters. This could possibly tie in with my understanding of strings.
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Jan 30, 2014
I have to validate security number based on tHIS REQUEST
If the SECURITYNNUBER IS INVALID UNDER THE SECURITYNUMBER attribute,it must reject(Date & algorith). To override the normal validation,the subject must contain INVALIDSECURITYNUMBER. The incorrect ID number must still reflect in the SECURITYNUMBER attribute.
THE FIRST 6 DIGIT IS DATE
EXAMPLE 7701205334086
public boolean val_SECURITYNUMBER()
{
boolean flag = true;
String u_Securtynr = transactionFile.getS_securtynumber();
// 1. Invalid securty number if completed
if(!isBlank(u_Securtynr))
[Code] .....
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Jun 26, 2014
How to change file permission in java....
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Feb 24, 2014
I decided to change the mouse cursor based on the theme of the game. This is the code that I wrote for the declaration of the cursor:
ImageIcon imageIcon = new ImageIcon ("cursor / cursor.gif");
Image img = imageIcon.getImage ();
Toolkit t = Toolkit.getDefaultToolkit ();
Cursor cursor = t.createCustomCursor (img, new Point (0,0), "cur");
this.setCursor (cursor);
Having to click on different JButton in the menu of the game, a few screens later, I have to manage something in particular, such as determining the point of clicks that allows the action to take place?
In particular I would like to change the point of hotspots. The size of 136x163 is cursor.gif
Image - TinyPic - Servizio di hosting d'immagini, condivisione immagini & hosting di video gratuito
As you can see in the image I want to create the point of hotspots in the red dot of the image. How should I do to pass the correct coordinates in Point?
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Nov 27, 2013
I have followed the Java tutorial on JAAS Authentication and Authorization. All the sample code in the tutorials works fine also when running under a security manager. Now I am trying to modify the LoginModule class, so that it uses a password file to look up users and passwords, but as soon as I try to run the code under a security manager, I get a Security Exception. I suppose it has something to do with the code havent been granted any access to read the password file? So I tried to add this to the policy file:
grant codebase "file:./sample/module/-" {
permission java.io.FilePermission "sample/module/passwords.txt", "read";
};
It didn't do any difference. why I get this Security Exception?
The only difference from my code to the tutorial code, is that I have added the lines:
Scanner scanner = null;
try {
scanner = new Scanner(new File("src/sample/module/passwords.txt"));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
to the login() method of the SampleLoginModule class...
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Aug 8, 2014
I would like to make an incremental change to an existing Java program. And the program has been installed on the user's machine. Now I only want to do an incremental download (to minimize the download time) to update the program.
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Jul 23, 2008
Its just two problems:
1.Write a Java Program that calculates the change for a cashier. The program requests the cost of the item. The user then types in the cost. The program then outputs the cost of the item including the sales tax (use 6% as the sales tax value). The program next requests and recieves the amount tendered by the customer. Finally, the program outputs a summary of all figures, including the amount of change due to the customer. Name the program as Change.java.
This program has the following attributes and methods:
double cost;
double tax;
double payment;
double getCost();
double getTax();
[code].....
2. Create a java program named Numbers whose main() method holds two integer variables. Assign values to the variables. Pass both variables to methods named sum() and difference(). Create the methods sum() and difference(); these compute the sum and difference between the values of two arguments, respectively. Each method should perform the appropriate computation and display the results. Name the program as Numbers.java.
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Aug 15, 2014
I am working on an Eclipse based project that uses WTP Eclipse plugin. Since I have switched security on in that plugin (by checking "Enable Security" check box on) I'm having multiple problems. I get a stack of security errors - attached in this post. I also show my java.policy file. Because the of the mass exceptions I list only the top, although I have attached a docx file with full thing.
Here is my java.policy file:
grant codeBase "file:${catalina.base}/wtpwebapps/App/WEB-INF/lib/hibernate-core-4.3.5.Final.jar" {
permission java.util.PropertyPermission "*", "read, write";
};
grant codeBase "file:${catalina.home}/lib/catalina.jar" {
permission java.lang.RuntimePermission "*";
[Code] ....
Exceptions:
15/08/2014 10:12:43 PM org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path:
C:Javajdk1.6.0_33in;C:WINDOWSSunJavain;
C:WINDOWSsystem32;C:WINDOWS;
[Code] .....
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Jan 13, 2014
package name;swing library found in javax called to use the graphical contents.
import javax.swing.*;
//creating the contents for the calculator
public class calc {
JButton btn1= new JButton("1 ");
JButton btn2= new JButton("2");
JButton btn3= new JButton("3");
[code]....
I have tried different sizes for the 'TextField' but when I change the size, the position changes instead of the size itself.
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Nov 16, 2014
I'm quite new to java programming, but eager to learn. I was wondering how to change actual java code, using user input. For example:
Java Code: int x = 0;
// Start the program and enter 3
// Now the code is
int x = 3 mh_sh_highlight_all('java');
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Mar 5, 2015
I have a strange problems. Perhaps some of you already have had this problem before.
I have method which is suppose to check if the itemstate has changed. It ONLY works ONCE?
Thereafter, it does not matter how many times I changed the selection of the ComboBox.
Basically I have two Comboboxes.
1. If Combobox 1 is selected (e.g. Dogs, Cats)
2. Then get information from what ever the item from ComboBox 1 is selected, and display on ComboBox 2. (Dog Name, Cat Name etc)
E.g.
So If I selected Dogs on Combobox 1
Then display the Dog Names on Combobox 2.
If I then change and select Cats on Combobox 1,
then display Cat Names on ComboBox 2.
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