| 1 | #!/usr/bin/perl -w |
| 2 | # checkpasswd-service |
| 3 | # part of userv-utils |
| 4 | |
| 5 | # protocols: |
| 6 | # |
| 7 | # userv root checkpasswd-self <<'END' |
| 8 | # < PASSWORD |
| 9 | # < ^D |
| 10 | # > STATUS MESSAGE... |
| 11 | # |
| 12 | # userv root checkpasswd-other USERNAME <<'END' |
| 13 | # < PASSWORD |
| 14 | # < ^D |
| 15 | # > STATUS MESSAGE... |
| 16 | # |
| 17 | # STATUS MESSAGE may be |
| 18 | # 0 ok |
| 19 | # 2 incorrect password |
| 20 | # 4 no such user |
| 21 | # 5 password disabled |
| 22 | |
| 23 | # Copyright 1996-2013 Ian Jackson <ijackson@chiark.greenend.org.uk> |
| 24 | # Copyright 1998 David Damerell <damerell@chiark.greenend.org.uk> |
| 25 | # Copyright 1999,2003 |
| 26 | # Chancellor Masters and Scholars of the University of Cambridge |
| 27 | # Copyright 2010 Tony Finch <fanf@dotat.at> |
| 28 | # |
| 29 | # This is free software; you can redistribute it and/or modify it |
| 30 | # under the terms of the GNU General Public License as published by |
| 31 | # the Free Software Foundation; either version 3 of the License, or |
| 32 | # (at your option) any later version. |
| 33 | # |
| 34 | # This program is distributed in the hope that it will be useful, but |
| 35 | # WITHOUT ANY WARRANTY; without even the implied warranty of |
| 36 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 37 | # General Public License for more details. |
| 38 | # |
| 39 | # You should have received a copy of the GNU General Public License |
| 40 | # along with userv-utils; if not, see http://www.gnu.org/licenses/. |
| 41 | |
| 42 | |
| 43 | use strict; |
| 44 | use IO::File; |
| 45 | use Fcntl qw(:flock); |
| 46 | |
| 47 | my ($lockpath, $delay, $separator, $username) = @ARGV; |
| 48 | |
| 49 | die "$0: bad usage\n" unless |
| 50 | @ARGV == 4 || |
| 51 | $lockpath =~ m#^/# || |
| 52 | $delay =~ m/^[0-9.]+$/ || |
| 53 | $separator eq '--' || |
| 54 | $username =~ m/^\w/; |
| 55 | |
| 56 | $username = $ENV{'USERV_USER'} if $username eq 'SELF'; |
| 57 | |
| 58 | sub result { |
| 59 | print "@_\n" or die $!; |
| 60 | exit 0; |
| 61 | } |
| 62 | |
| 63 | my @pwent = getpwnam($username); |
| 64 | result 4, "no such user" unless @pwent; |
| 65 | |
| 66 | my $encrpw= $pwent[1]; |
| 67 | result 5, "password disabled" unless length $encrpw >= 13; |
| 68 | |
| 69 | $!=0; my $pw = <STDIN>; |
| 70 | chomp $pw or die "reading password: $!\n"; |
| 71 | |
| 72 | my $lockf = new IO::File $lockpath, "w+" or die "open $lockpath: $!\n"; |
| 73 | flock($lockf, LOCK_EX) or die "lock $lockpath: $!\n"; |
| 74 | select(undef,undef,undef,0.5); |
| 75 | close $lockf; |
| 76 | |
| 77 | my $crval = crypt($pw,$encrpw); |
| 78 | |
| 79 | result 2, "incorrect password" unless $crval eq $encrpw; |
| 80 | |
| 81 | result 0, "ok"; |