Openssl Commands

Having the correct tool for the job is critical and when managing one’s PKI infrastructure, openssl is often the first command reached for in one’s toolbox and for good reason.

Modulus

View the modulus of a certificate

openssl x509 -in <certificate> -modulus -noout

View the Modulus of a Key

openssl rsa -in <keyfile> -noout -modulus 

Certificates

View the entire certificate chain

openssl crl2pkcs7 -nocrl -certfile server_bundle.pem | openssl pkcs7 -print_certs -noout