How to add subject alernative name to ssl certs?

Question

I\'m using openssl to create self-signed certs. I\'m getting this error with the certs I generated:

javax.net.ssl.SSLHandshakeException: ja

Answer 1

When generating CSR is possible to specify -ext attribute again to have it inserted in the CSR

keytool -certreq -file test.csr -keystore test.jks -alias testAlias -ext SAN=dns:test.example.com

complete example here: How to create CSR with SANs using keytool