NAME

       mandos-keygen - Generate key and password for Mandos client and server.

SYNOPSIS

       mandos-keygen [--dir DIRECTORY | -d DIRECTORY]
                     [--type KEYTYPE | -t KEYTYPE]
                     [--length BITS | -l BITS]
                     [--subtype KEYTYPE | -s KEYTYPE]
                     [--sublength BITS | -L BITS]
                     [--name NAME | -n NAME]
                     [--email ADDRESS | -e ADDRESS]
                     [--comment TEXT | -c TEXT]
                     [--expire TIME | -x TIME]
                     [--force]

       mandos-keygen {--password | -p | --passfile FILE | -F FILE}
                     [--dir DIRECTORY | -d DIRECTORY]
                     [--name NAME | -n NAME]

       mandos-keygen {--help | -h}

       mandos-keygen {--version | -v}

DESCRIPTION

       mandos-keygen is a program to generate the OpenPGP key used by mandos-client(8mandos). The
       key is normally written to /etc/mandos for later installation into the initrd image, but
       this, and most other things, can be changed with command line options.

       This program can also be used with the --password or --passfile options to generate a
       ready-made section for clients.conf (see mandos-clients.conf(5)).

PURPOSE

       The purpose of this is to enable remote and unattended rebooting of client host computer
       with an encrypted root file system. See the section called “OVERVIEW” for details.

OPTIONS

       --help, -h
           Show a help message and exit

       --dir DIRECTORY, -d DIRECTORY
           Target directory for key files. Default is /etc/mandos.

       --type TYPE, -t TYPE
           Key type. Default is “DSA”.

       --length BITS, -l BITS
           Key length in bits. Default is 2048.

       --subtype KEYTYPE, -s KEYTYPE
           Subkey type. Default is “ELG-E” (Elgamal encryption-only).

       --sublength BITS, -L BITS
           Subkey length in bits. Default is 2048.

       --email ADDRESS, -e ADDRESS
           Email address of key. Default is empty.

       --comment TEXT, -c TEXT
           Comment field for key. The default value is “Mandos client key”.

       --expire TIME, -x TIME
           Key expire time. Default is no expiration. See gpg(1) for syntax.

       --force, -f
           Force overwriting old key.

       --password, -p
           Prompt for a password and encrypt it with the key already present in either
           /etc/mandos or the directory specified with the --dir option. Outputs, on standard
           output, a section suitable for inclusion in mandos-clients.conf(8). The host name or
           the name specified with the --name option is used for the section header. All other
           options are ignored, and no key is created.

       --passfile FILE, -F FILE
           The same as --password, but read from FILE, not the terminal.

OVERVIEW

       This is part of the Mandos system for allowing computers to have encrypted root file
       systems and at the same time be capable of remote and/or unattended reboots. The computers
       run a small client program in the initial RAM disk environment which will communicate with
       a server over a network. All network communication is encrypted using TLS. The clients are
       identified by the server using an OpenPGP key; each client has one unique to it. The
       server sends the clients an encrypted password. The encrypted password is decrypted by the
       clients using the same OpenPGP key, and the password is then used to unlock the root file
       system, whereupon the computers can continue booting normally.

       This program is a small utility to generate new OpenPGP keys for new Mandos clients, and
       to generate sections for inclusion in clients.conf on the server.

EXIT STATUS

       The exit status will be 0 if a new key (or password, if the --password option was used)
       was successfully created, otherwise not.

ENVIRONMENT

       TMPDIR
           If set, temporary files will be created here. See mktemp(1).

FILES

       Use the --dir option to change where mandos-keygen will write the key files. The default
       file names are shown here.

       /etc/mandos/seckey.txt
           OpenPGP secret key file which will be created or overwritten.

       /etc/mandos/pubkey.txt
           OpenPGP public key file which will be created or overwritten.

       /tmp
           Temporary files will be written here if TMPDIR is not set.

EXAMPLE

       Normal invocation needs no options:

       mandos-keygen

       Create key in another directory and of another type. Force overwriting old key files:

       mandos-keygen --dir ~/keydir --type RSA --force

       Prompt for a password, encrypt it with the key in /etc/mandos and output a section
       suitable for clients.conf.

       mandos-keygen --password

       Prompt for a password, encrypt it with the key in the client-key directory and output a
       section suitable for clients.conf.

       mandos-keygen --password --dir client-key

SECURITY

       The --type, --length, --subtype, and --sublength options can be used to create keys of low
       security. If in doubt, leave them to the default values.

       The key expire time is not guaranteed to be honored by mandos(8).

SEE ALSO

       intro(8mandos), gpg(1), mandos-clients.conf(5), mandos(8), mandos-client(8mandos)

COPYRIGHT

       Copyright © 2008-2009, 2011-2012 Teddy Hogeborn, Björn Påhlsson

       This manual page is free software: you can redistribute it and/or modify it under the
       terms of the GNU General Public License as published by the Free Software Foundation,
       either version 3 of the License, or (at your option) any later version.

       This manual page is distributed in the hope that it will be useful, but WITHOUT ANY
       WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
       PURPOSE. See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program.
       If not, see http://www.gnu.org/licenses/.