Commonly used openssl commands are as follows:

Commonly used openssl commands are as follows: 

Check a certificate

openssl x509 -in certificate_name -text -noout

Get all certificates from a server

openssl s_client -connect host:ssl_port -showcerts

Convert a DER format certificate to PEM format

openssl x509 -inform der -in path_to_DER_certificate -out path_to_PEM_certificate

Convert a .pfx file to a JKS store

keytool -importkeystore -srckeystore path_to_.pfx_file -srcstoretype pkcs12 -destkeystore path_to_the_jks_file -deststoretype JKS -srcstorepass pfx_passwd -deststorepass pfx_passwd

Convert a .jks file to PKCS12 format

keytool -importkeystore -srckeystore path_to_.jks_file -destkeystore full_path_to_.p12_file-srcstoretype JKS - deststoretype PKCS12 -deststorepass pkcs12_store_password

Extract a private key from a .pfx file

openssl pkcs12 -info -in path_to_.pfx_file -nodes -nocerts -out private_key_file_name

Extract a public certificate from a .pfx file

openssl pkcs12 -in path_to_.pfx_file -out path_to_certificate_file -nokeys