class SSHKey

def format_sshfp_record(hostname, type, key)
  [[Digest::SHA1, 1], [Digest::SHA256, 2]].map { |f, num|
    fpr = f.hexdigest(key)
    "#{hostname} IN SSHFP #{SSHFP_TYPES[type]} #{num} #{fpr}"
  }.join("\n")
end