rootsign - cryptographically sign standard input with a private/public keypair unique to the local root

       This  manpage  and  the  utility were written by Dustin Kirkland <kirkland@ubuntu.com> for Ubuntu systems
       (but may be used by others).  Permission is granted to copy, distribute and/or modify this  document  and
       the  utility  under the terms of the GNU General Public License, Version 3 published by the Free Software
       Foundation.

       The complete text of the GNU General Public License can be  found  in  /usr/share/common-licenses/GPL  on
       Debian/Ubuntu systems, or on the web at http://www.gnu.org/licenses/gpl.txt.

bootmail                                          19 July 2011                                       rootsign(8)

rootsign is a program that operates on standard input, cryptographically signing it with a private/public
       keypair only accessible by the local root user, and outputting the result on standard out,  suitable  for
       piping to mail(1).

       A  new  key will be generated on first use, and is written to /var/lib/rootsign/$KEYID.rsa.pub for import
       by other users into their keyring, in order to verify signatures.

       This tool is used by bootmail(8) to sign messages, but could easily be used by others.

       rootsign can optionally encrypt the message as well, by setting the recipient's  gpg(1)  key  id  in  the
       RECIPIENT_KEYID variable in I/etc/bootmail/gpg.conf.

/etc/bootmail/gpg.conf, /var/lib/rootsign/*.rsa.pub

       rootsign  -  cryptographically sign standard input with a private/public keypair unique to the local root
       user

gpg(1), bootmail(8), mail(1)

       http://launchpad.net/bootmail