How to get a *.cer file to add a self-signed HTTPS certificate as trusted for Java

Posted by pako on Stack Overflow See other posts from Stack Overflow or by pako
Published on 2010-03-14T16:12:53Z Indexed on 2010/03/14 16:15 UTC
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java

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applet

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ssl

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java-applet

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https

I'm connecting to a HTTPS website with a self-signed certificate using a Java applet. The applet can't open the HTTPS connection - it returns the following exception:

javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

So the problem is that I need to add the certificate as "trusted" for Java. I read that I should use the following command:

keytool -import -alias abc -file ABCCA.cer

Am I correct? How do I retrieve the *.cer file? The server is running Debian 5. I'm using Windows 7 and Java 6 on the client machine.

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