## OpenSSL Extract Public Key from Cert
With the leaf certificate from Stackoverflow.com, you can extract the public key that is embedded inside of the cert with this command:
`openssl x509 -pubkey -noout -in stackexchangecom.crt > pubkey.pem`
Print your cert information..
`openssl x509 -in stackexchangecom.crt -text -noout`
Print your public key...
`openssl rsa -inform PEM -pubin -in pubkey.pem -text -noout`
now you can compare the Modulus of the cert and public key to see they are the same.