signature decoding with pubkey in command line

Hello! Could you help me in decoding a signature with public key in command line. The purpose is that I could compare the result with a fingerprint calculated from a document (with a hash-function ie. md5), because it would be used on a web-page, and I think nobody wanna send a private document t

get certificate chain building up on the cert of an end-entity

Hi! My question is that, if I have a cert, how could i collect the certs on its certificate chain to the rootCA? I need the whole certificates, not only the information about validity! THe best would be one file containing all certs. Is it possible, how? thanks: