title: What are Public key header and public key info?
body: <p>I am trying to find what is public key header and public key info. I have dumped a certificate in C format using openssl, along with public key modulus. It listed public key info and public key header as public key. But I am not able to dump these fields using <code>openssl.exe rsa -pubin -inform  DER -text -noout &lt; publickey.der</code> for a public key generated on my server.</p>
  
  <p>Could any please explain what is the significance of these fields in a digital certificate, are they same for all the public keys? Not able to get this info on openssl, it is just mentioned that DER encoding will have additional header and footer.</p>