crt轉爲p12證書
openssl pkcs12 -export -in client.crt -inkey client.key -out iot.p12 -name "iot"
jks p12互轉
keytool -importkeystore -srckeystore iot.p12 -srcstoretype PKCS12 -deststoretype JKS -destkeystore iot.jks
keytool -importkeystore -srckeystore iot.jks -srcstoretype JKS -deststoretype PKCS12 -destkeystore iot.p12