1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
# **** License ****
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program 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.
#
# This code was originally developed by Vyatta, Inc.
# Portions created by Vyatta are Copyright (C) 2007 Vyatta, Inc.
# All Rights Reserved.
#
# **** End License ****
package Vyatta::Login::User;
use strict;
use warnings;
use lib "/opt/vyatta/share/perl5";
use Vyatta::Config;
use Vyatta::Login::Misc;
# Exit codes form useradd.8 man page
my %reasons = (
0 => 'success',
1 => 'can´t update password file',
2 => 'invalid command syntax',
3 => 'invalid argument to option',
4 => 'UID already in use (and no -o)',
6 => 'specified group doesn´t exist',
9 => 'username already in use',
10 => 'can´t update group file',
12 => 'can´t create home directory',
13 => 'can´t create mail spool',
);
# Construct a map from existing users to group membership
sub get_groups {
my %group_map;
setgrent();
while ( my ( $name, undef, undef, $members ) = getgrent() ) {
foreach my $user ( split / /, $members ) {
$group_map{$user} = [] unless ( $group_map{$user} );
my $g = $group_map{$user};
push @$g, $name;
}
}
endgrent();
return \%group_map;
}
my $levelFile = "/opt/vyatta/etc/level";
# Convert level to additional groups
sub _level2groups {
my $level = shift;
my @groups;
open (my $f, '<', $levelFile)
or return;
while (<$f>) {
chomp;
next unless $_;
my ($l, $g) = split /:/;
if ($l eq $level) {
@groups = split(/,/, $g);
last;
}
}
close $f;
return @groups;
}
# protected users override file
my $protected_users = '/opt/vyatta/etc/protected-user';
# Users who MUST not use vbash
sub _protected_users {
my @protected;
open my $pfd, '<', $protected_users
or return;
while (<$pfd>) {
chomp;
next unless $_;
push @protected, $_;
}
close($pfd);
return @protected;
}
# make list of vyatta users (ie. users of vbash)
sub _vyatta_users {
my @vusers;
setpwent();
# ($name,$passwd,$uid,$gid,$quota,$comment,$gcos,$dir,$shell,$expire)
# = getpw*
while ( my ($name, undef, undef, undef, undef, undef,
undef, undef, $shell) = getpwent() ) {
push @vusers, $name if ($shell eq '/bin/vbash');
}
endpwent();
return @vusers;
}
sub update {
my $membership = get_groups();
my $uconfig = new Vyatta::Config;
$uconfig->setLevel("system login user");
my %users = $uconfig->listNodeStatus();
die "All users deleted!\n" unless %users;
die "User root cannot be deleted\n"
if (! defined $users{'root'} || $users{'root'} eq 'deleted');
foreach my $user ( keys %users ) {
if ( $users{$user} eq 'deleted' ) {
system("sudo userdel -r '$user'") == 0
or die "userdel failed: $?\n";
}
elsif ( $users{$user} eq 'added' || $users{$user} eq 'changed' ) {
$uconfig->setLevel("system login user $user");
my $pwd = $uconfig->returnValue('authentication encrypted-password');
unless ($pwd) {
warn "Encrypted password not in configuration for $user";
next;
}
my $level = $uconfig->returnValue('level');
unless ($level) {
warn "Level not defined for $user";
next;
}
# map level to group membership
my @new_groups = _level2groups($level);
# add any additional groups from configuration
push( @new_groups, $uconfig->returnValues('group') );
my $fname = $uconfig->returnValue('full-name');
my $home = $uconfig->returnValue('home-directory');
# Read existing settings
my (undef, $opwd, $uid, $gid, undef, $comment,
undef, $dir, $shell, undef) = getpwnam($user);
my $old_groups = $membership->{$user};
my $cmd;
my $og_str = (defined($old_groups))
? (join(' ', sort @$old_groups)) : '';
my $ng_str = join(' ', sort @new_groups);
# not found in existing passwd, must be new
if ( !defined $uid ) {
# make new user using vyatta shell
# and make home directory (-m)
# and with default group of 100 (users)
$cmd = 'useradd -s /bin/vbash -m -N';
} elsif ($opwd eq $pwd
&& ( !$fname || $fname eq $comment )
&& ( !$home || $home eq $dir )
&& $og_str eq $ng_str) {
# If no part of password or group file changed
# then there is nothing to do here.
next;
} else {
$cmd = "usermod";
}
$cmd .= " -p '$pwd'";
$cmd .= " -c \"$fname\"" if ( defined $fname );
$cmd .= " -d \"$home\"" if ( defined $home );
$cmd .= ' -G ' . join( ',', @new_groups );
system("sudo $cmd $user");
next if ( $? == 0 );
my $reason = $reasons{ ( $? >> 8 ) };
die "Attempt to change user $user failed: $reason\n";
}
}
# Remove any vyatta users that do not exist in current configuration
# This can happen if user added but configuration not saved
my %protected = map { $_ => 1 } _protected_users();
foreach my $user (_vyatta_users()) {
if ($protected{$user}) {
warn "User $user should not being using vbash - fixed\n";
system ("usermod -s /bin/bash $user") == 0
or die "Attempt to modify user $user shell failed: $!";
} elsif (! defined $users{$user}) {
warn "User $user not listed in current configuration\n";
system ("userdel --remove $user") == 0
or die "Attempt to delete user $user failed: $!";
}
}
}
1;
|
