Self-signed applet and plug-in 1.3 step-by-step (works me !!!)
X_Aki Nieminen_X
work. I want to share my findings. Please, post here results you got AND
DESCRIBE client environment. I would like to know if this same method works
in WinNT/Win2000 and with Netscape 4 & Netscape 6.
NS6 has a builtin Java plug-in and I wonder if this applies to it as well.
Description:
Use self-signed certificate for java plug-in 1.3 applets to remove a sandbox
restrictions. Everyone can create own self-signed certificate for
development and/or intranet purposes. You don't need to purchase a
commercial certificate from Vesign. You can attach "mycert.crt" file as
hyperlink on your website and instruct users to run it before using intranet
applets.
client: Win98/Java plug-in 1.3/IE 4
1: Compile java sources (TestApplet.java, CharCounter.java)
c:\test\javac CharCounter.java
c:\test\javac TestApplet.java
2: Create self-signed RSA certificate:
c:\test\keytool -genkey -keystore ./mystore -alias mykey -keyalg RSA
type in the information being prompted.
3: Export certificate to a file:
c:\test\keytool -export -keystore ./mystore -alias mykey -file mycert.crt
4: Import certificate to trusted CA database of Internet Explorer:
double-click the "mycert.crt" file, view it and accept. Cerfication appears
to IE cert-db and is listed in internet settings/cerficates list.
5: Create JAR file:
c:\test\jar cvf MyApplet.jar TestApplet.class CharCounter.class
6: Sign previous jar file to create a new signed JAR file:
c:\test\jarsigner -keystore ./mystore -signedjar sMyApplet.jar MyApplet.jar
mykey
7: Create "c:\test\data.txt" text file and fill in the some data.
8: Open "testapplet.html" file. You should get a certification dialog box
when loading an applet and grand or deny access rights.
9: Applet reads the number of chars in data.txt file and display results.
Test files below:
===============
[file: TestApplet.java]
import java.awt.*;
import java.applet.*;
public class TestApplet extends Applet {
private int iCount;
private int iFileCount;
public void init() {
iCount = 123;
iFileCount = CharCounter.count("c:/test/data.txt");
}
public void paint(Graphics g) {
g.drawString("Count " + iCount, 10,10);
g.drawString("File count " + iFileCount, 10,30);
}
}
===============
[file: CharCounter.java]
import java.io.*;
class CharCounter {
public static int count(String file) {
InputStream in = null;
int count = 0;
try {
in = new FileInputStream(file);
while(in.read() != -1)
count++;
}
} catch (Exception e)
// do nothing
} finally {
try
in.close();
} catch (Exception e)
// do nothing
}
}
return count;
}
}
===============
<pre>
===============
[file: TestApplet.html]
<html>
<head>
<title>Test Applet</title>
</head>
<body>
<h3>Signed applet jar (java plug-in)</h3>
<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
codebase="http://java.sun.com/products/plugin/1.3/jinstall-13-win32.cab#Vers
ion=1,3,0,0"
width=100 height=100>
<param name="code" value="TestApplet.class">
<param name="codebase" value=".">
<param name="archive" value="sMyApplet.jar">
<param name="type" value="application/x-java-applet;version=1.3">
<param name="scriptable" value="false">
</OBJECT>
<!--
<EMBED type="application/x-java-applet;version=1.3"
pluginspage="http://java.sun.com/products/plugin/1.3/plugin-install.html"
width=100 height=100
code="TestApplet.class"
codebase="."
archive="sMyApplet.jar"
scriptable="false">
</EMBED>
-->
</body>
</html>
====================
</pre>