I need to authenticate with two-way authentication. I have two JavaKeyStore files keystore.jks and truststore.jks that I use when authentication with java client , now I want to use Python client that needs .cer file . so how can I create the certificate file from the jks files ?
Use this command:
keytool -export -alias keystore_alias -file your_cert.cer -keystore keystore.jks
Here keystore_alias is the alias of the keystore. You will prompted for the keystore password, which you also must know in order to generate a certificate.
This website is a great reference for the various things that can be done with Java keystore files:
https://www.sslshopper.com/article-most-common-java-keytool-keystore-commands.html