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#!/usr/bin/perl -w # luksformat - wrapper around LUKS-capable cryptsetup and mkfs for easy # creation of an encrypted device. # # (C) 2005 Canonical Ltd. # Author: Martin Pitt <martin.pitt@ubuntu.com> # License: GNU General Public License, v2 or any later # (https://www.gnu.org/copyleft/gpl.html) use Getopt::Long qw(:config pass_through); BEGIN { eval 'use Locale::gettext'; if ($@) { *gettext = sub { shift }; *textdomain = sub { "" }; *LC_MESSAGES = sub { 5 }; } eval { require POSIX; import POSIX qw(setlocale); }; if ($@) { *setlocale = sub { return 1 }; } } setlocale(LC_MESSAGES, ""); textdomain("luksformat"); if ($> != 0) { print STDERR gettext("This program needs to be started as root\n"); exit 1; } sub usage() { print gettext("luksformat - Create and format an encrypted LUKS device Usage: luksformat [-t <file system>] <device> [ mkfs options ]\n\n"); exit 1; } # default file system $fs = 'vfat'; exit 1 unless GetOptions ('t|type=s' => \$fs); GetOptions ('help', \$help); if (($#ARGV < 0) || ($help)) { usage(); } $device = shift(@ARGV); open(MOUNTS, "/proc/mounts"); while (<MOUNTS>) { die sprintf(gettext("Error: device mounted: %s\n"), $device) if (/\Q$device\E/) } if (-x "/usr/sbin/mkfs.$fs") { $mkfs = "/usr/sbin/mkfs.$fs"; } elsif (-x "/usr/bin/mkfs.$fs") { $mkfs = "/usr/bin/mkfs.$fs"; } elsif (-x "/sbin/mkfs.$fs") { $mkfs = "/sbin/mkfs.$fs"; } elsif (-x "/bin/mkfs.$fs") { $mkfs = "/bin/mkfs.$fs"; } else { printf STDERR (gettext("Error: invalid file system: %s\n"), $fs); exit 1; } # generate temporary mapped device name which is not yet used $name = ""; for ($i = 1; $i < 100; $i++) { if (! -e "/dev/mapper/luksformat$i") { $name = "luksformat$i"; last; } } $name or die sprintf(gettext("Error: could not generate temporary mapped device name")); # we do not need to be overly concerned with race conditions here, cryptsetup # will just fail if the name already exists now. printf (gettext("Creating encrypted device on %s...\n"), $device); if ((system 'cryptsetup', 'luksFormat', $device)) { die sprintf(gettext("Could not create LUKS device %s"), $device); } print gettext("Please enter your passphrase again to verify it\n"); if ((system 'cryptsetup', 'open', '--type', 'luks', $device, $name) != 0) { print STDERR gettext("The passphrases you entered were not identical\n"); exit 1; } $result = system $mkfs, "/dev/mapper/$name", @ARGV; print "\n"; system 'udevadm', 'settle', '--timeout=30'; system 'cryptsetup', 'luksClose', $name; die sprintf(gettext("Could not format device with file system %s"), $fs) if $result; __END__ =head1 NAME luksformat - Create and format an encrypted LUKS device =head1 SYNOPSIS B<luksformat> [B<-t> I<fstype>] I<device> [ mkfs options ] =head1 DESCRIPTION B<luksformat> is a wrapper around B<cryptsetup> and B<mkfs> which provides an easy interface for creating an encrypted device that follows the LUKS standard and for putting a file system onto the encrypted device. The default file system is B<vfat> since that is most commonly used on removable devices. However, you can specify any available file system with the B<-t> option. =head1 SEE ALSO L<cryptsetup(8)>, L<mkfs(8)> =head1 AUTHOR This program was written by Martin Pitt <martin.pitt@ubuntu.com>.
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