How to sign an applet

Game_Master · June 19, 2009 at 9:29 PM

[size:14pt]How to sign an app[/size]
Signing your java applet allows you to access a users computer. For example you can connect to the internet with Mooclick. Before you get started you must download and install the lastest Java Dev kit (Please login to see this link. and download the Java SE JDK).

Once you have installed the JDK, go to command prompt. Then change the directory to C:\Program Files\Java\jdk1.6.0_14\bin (or wherever you installed the JDK). Then enter the following:

Code

keytool -genkey -alias mykey

Replace "mykey" with the name of the key you want to make. You will probably then be asked to enter a password. This is usually your windows password. Your already built Java Applet should be in the "bin" folder. I find it works best if there are no spaces in the name of the jar file. Then type this:

Code

jarsigner -signedjar nameofsignedjar.jar nameofunsignedjar.jar mykey

Change "nameofsignedjar.jar" to what you want the name of the signed applet to be. Then change "nameofunsignedjar.jar" to the file name of your built applet. The nameofsignedjar.jar should not be the same as the nameofunsignedjar.jar. Finally change "mykey" to the name of the key you generated earlier. Now press the enter/return key. You may be promted again to enter a password. Do this then press return again. Your applet should now be signed. It will be contained in the bin folder.

The sign will expire after 6 months, but you can always sign it again.

If you can't be bothered to sign the applet, send it to me via PM and I will do it for you. Please use this form:
Desired key name:
Name of signed applet:
Link to unsigned applet:

Jacob · June 19, 2009 at 11:26 PM

Can you use %20 in place of the space?

Game_Master · June 19, 2009 at 11:32 PM

Maybe, but I haven't tried it. It is just easier to just remove any spaces, then rename the signed applet after it has been created.

Looki · June 19, 2009 at 11:50 PM

Erm, I haven't seen that being used anywhere but in HTTP, so my guess is no. Nice tutorial, wasn't as easy as I expected.

Jacob · June 20, 2009 at 5:56 AM

On Ubuntu does right clicking on it and selecting "sign" count?

Game_Master · June 20, 2009 at 7:13 PM

@DarkeSoft: Not sure. Sorry.

Signing Helper
This is a little utility that I made to make signing applets easy. Here:
Please login to see this link.

If the java version doesn't work, use the exe version below:
Please login to see this link.

Please login to see this picture.

DJFuego · June 20, 2009 at 8:10 PM

Maybe it would be useful for clickteam to include a signing option as part of the build process in a future release

I would make a batch file and right click send to...

Czentnar · June 21, 2009 at 11:50 AM

Thanks Game Master for the Signing Helper, that's very useful.
The Java does not work on Mac, though.
About a signing option: Francois said that Clickteam do not have their own signing tool. (in Please login to see this link. thread)

Arnax · November 30, 2009 at 4:33 AM

What do I do if it says jarsigner is not recognized as an internal or external command, operable program, or batch file?

Sorry if this is obvious, I haven't worked with Java or command prompt before.

Thanks

Arnax · November 30, 2009 at 5:15 AM

Oh, never mind. I had downloaded the wrong thing, hehe

Herbert · May 2, 2010 at 9:16 PM

Yes, it would be great to have a signing option in mmf as part of the build process. I installed 500 MB JAVA to try to sign applets.

Regards, Herbert

Ausomeman · May 18, 2010 at 9:28 PM

Ok, I have a signing issue. I tried the original method and got "unable to sign applet". And using the helper I get, "certificate chain not found for: Name. Name must reference a valid KeyStore key entry containing a private key and corresponding public key certificate chain"

I just left it as mykey for simplicity when I created (or thought I did). What do I do now?

JasTDW · October 2, 2012 at 8:29 AM

Where and what is command prompt? and where do you enter the code?

Danny · October 2, 2012 at 9:21 AM

Click on Start Menu > Run > cmd.exe (hit enter)

Command prompt is a dos shell in windows. To change directory as per the instructions above use cd C:\Program Files\Java\jdk1.6.0_14\bin or whatever JDK folder you want to use.

JasTDW · October 5, 2012 at 6:01 AM

Alright, thanks man!

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