How to use Letsencrypt certificate & private key with Jetty

letsencrypt-jetty.sh

# input: fullchain.pem and privkey.pem as generated by the "letsencrypt-auto" script when run with
# the "auth" aka "certonly" subcommand

# convert certificate chain + private key to the PKCS#12 file format
openssl pkcs12 -export -out keystore.pkcs12 -in fullchain.pem -inkey privkey.pem

# convert PKCS#12 file into Java keystore format
keytool -importkeystore -srckeystore keystore.pkcs12 -srcstoretype PKCS12 -destkeystore keystore.jks

# don't need the PKCS#12 file anymore
rm keystore.pkcs12

# Now use "keystore.jks" as keystore in jetty with the keystore password you specfied when you ran
# the "keytool" command

Thank you for this. Lifesaver.

Putting the file into a .jks file isn't necessary. You can load the PKCS #12 file directly:

Indeed, this is a feature of modern JDKs; they have deprecated the proprietary JKS-format in favour of PKCS12, so you can use the PKCS12 output from the openssl-step directly.

You can recognise this from your Keytool output; Your Java can handle PKCS12 keystores if your keytool shows the warning:

The JKS keystore uses a proprietary format. It is recommended to migrate to PKCS12 which is an industry standard format using "keytool -importkeystore -srckeystore keystore.jks -destkeystore keystore.jks -deststoretype pkcs12".

Omg thanks everybody for your nice comments, glad it was of help! :)

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Thanks @juleskers — yeah things have definately improved a lot since the letsencrypt snowballing started :)