Also you can find more details on creating self signed KeyStore from here. Securing your Java application with an SSL certificate can be extremely important. Fortunately, it is usually quite simple to do using Java Keytool. Most situations require that you buy a trusted certificate, but there are many cases when you can generate and use a self signed certificate for free. An SSL certificate serves two essential purposes: distributing the public key and verifying the identity of the server so users know they aren't sending their information to the wrong server.
It can only properly verify the identity of the server when it is signed by a trusted third party. A self signed certificate is a certificate that is signed by itself rather than a trusted authority. Since any attacker can create a self signed certificate and launch a man-in-the-middle attack, a user can't know whether they are sending their encrypted information to the server or an attacker. Because of this, you will almost never want to use a self signed certificate on a public Java server that requires anonymous visitors to connect to your site.
However, self signed certificates have their place:. Never use a self signed certificate on an e-commerce site or any site that transfers valuable personal information like credit cards, social security numbers, etc.
Just keep in mind that visitors will see a warning in their browsers like the one below when connecting to a server that uses a self signed certificate until it is permanently stored in their certificate store. Now that you know when to use a Keytool self signed certificate , let's create one using a simple Java Keytool command:. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name.
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Stack Overflow works best with JavaScript enabled. Accept all cookies Customize settings. CN should match the domain name of your webapp if you are planning to use this keystore for your servlet container.
Download Root certificate from CA. The most important thing you want to see is that, under the private key alias, additional information is being displayed. You're looking for this:. Since the stupid Java keytool doesn't allow you to import private keys, you download this tool:. CN should match the domain name of your webapp if you are planning to use this keystore for your servlet container You can verify keystore contents using this command: 3.
Save the signed certificate from CA to a file signed-cert. Import Root Certificate to keystore using this command: where root-cert.
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