Get an md5 hash (fingerprint) from an input file using the standard
crypto/md5 package.
I also added a flag to read in your .ssh/id_rsa.pub key to get your ssh fingerprint.
Get an sha256 hash (fingerprint) from an input file using the standard
crypto/sha256 package.
I also added a flag to read in your .ssh/id_rsa.pub key to get your ssh fingerprint.