You will be prompted fro the keystore password. Keytool -genkey -alias tutorialspedia -keyalg RSA -keystore “C:\test\tutorialspedia.jks” To crate a keystore in JKS format, we will use keytool with genkey options as below where we specify alias, algorithm to be used and also name of the keystore file along with its location where it needs to be saved. Java Keytool Tutorial Step 1: Create JKS File using Java KeyTool Now we will proceed with step by step tuorial for creating Keystore and exporting public certificate from it using Java Keytool. Java KeyTool Step By Step Tutorial for Generating JKS Keystore and Exporting Public certificate from JKS File If you prefer going through all the steps of JKS Tutorial in Text format, continue reading below. If you prefer to watch all the steps in a video format, you can watch below video on TutorialsPedia YouTube Channel explaining step by step process to generate keystore using Java KeyTool and exporting Public Certificate from Keystore file. This tool provides different options including generation of keystores, exporting private keys and public certificates from keystores and also importing certificates in the keystore. Java Key tool is used to create self signed certificates. Java Keytool is a command line utility which is available as part of JDK installation and is available in the bin folder of your JDK installation. In this step by step Java Keytool tutorial, I will explain how to create a key store using Java Keytool and then how to export public certificate from JKS file using Java Keytool. You’d rarely need to do what I’ve shown above, but in case you have to, I hope the hints above were useful.Java keytool is a command line utility which can be used to generate keystores and then we can export keys and self signed public certificates from it with different command options provided by Java Key Tool. Of course, if you have to do very specific or odd stuff, you’ll have to revert to the command line, but for most operation,s the UI is sufficient (unless you have to automate it, in which case, obviously, use the CLI). It is a great tool that makes working with keys and keystores easy and predictable, as opposed to command-line tools like keytool and OpenSSL, which I’m sure nobody is able to use without googling every single command. You’ve noticed my preference for keytool-explorer. This is straightforward through the keystore-explorer UI, and much less easily through the command line. For example, when it comes to timestamping, the extension file looks like this: extendedKeyUsage=critical,timeStampingĪfter that, “simply” create a new keystore and import the private key and the newly generated certificate. The extfile.cnf is optional and is used if you want to specify extensions. So, you need to use OpenSSL: x509 -req -days 3650 -in req.csr -signkey private.key -sha256 -extfile extfile.cnf -out result.crt And you can’t remove the certificate and generate a new one. If you try to sign the request with your existing keystore keypair, the current certificate is used as the root of the chain (and you don’t want that). The last two steps seem to be not straightforward with keytool or keystore explorer.
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