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#!/usr/bin/env perl
use strict;
use feature 'state';
use Data::Dumper;
#
# Converts a sudoers file to LDIF format in prepration for loading into
# the LDAP server.
#
# $Sudo: sudoers2ldif,v 1.2.2.1 2007/06/28 14:45:19 millert Exp $
#
# BUGS:
# Does not yet handle multiple lines with : in them
# Does not yet remove quotation marks from options
# Does not yet escape + at the beginning of a dn
# Does not yet handle line wraps correctly
# Does not yet handle multiple roles with same name (needs tiebreaker)
# Sudoers entries can have multiple Runas entries that override former ones,
# with LDAP sudoRunas applies to all commands in a sudoRole
my %UA;
my %HA;
my %CA;
my %RA;
##my $base=$ENV{SUDOERS_BASE} or die "$0: Container SUDOERS_BASE undefined\n";
my @options=();
my %user_group_namespaces=();
$user_group_namespaces{'netgroup'}='xmlns="http://freeipa.org/xml/rng/netgroup/1.0"';
$user_group_namespaces{'posixGroup'}='xmlns="http://freeipa.org/xml/rng/posixGroup/1.0"';
$user_group_namespaces{'user'}='xmlns="http://freeipa.org/xml/rng/user/1.0"';
my %user_group_attributename=();
$user_group_attributename{'netgroup'}='groupnames';
$user_group_attributename{'posixGroup'}='gids';
$user_group_attributename{'user'}='uids';
my $did_defaults=0;
print '<?xml version="1.0" encoding="UTF-8"?>'."\n";
print '<ipa xmlns="http://freeipa.org/xml/rng/ipa/1.0">'."\n";
# parse sudoers one line at a time
while (<>){
# remove comment
s/#.*//;
# line continuation
$_.=<> while s/\\\s*$//s;
# cleanup newline
chomp;
# ignore blank lines
next if /^\s*$/;
if (/^Defaults\s+/i) {
my $opt=$';
$opt=~s/\s+$//; # remove trailing whitespace
push @options,$opt;
} elsif (/^Defaults[:@>]/i) {
#ignore
my $opt=$';
} elsif (/^(\S+)\s+(.+)=\s*(.*)/) {
# Aliases or Definitions
my ($p1,$p2,$p3)=($1,$2,$3);
$p2=~s/\s+$//; # remove trailing whitespace
$p3=~s/\s+$//; # remove trailing whitespace
if ($p1 eq "User_Alias") {
$UA{$p2}=$p3;
} elsif ($p1 eq "Host_Alias") {
$HA{$p2}=$p3;
} elsif ($p1 eq "Cmnd_Alias") {
$CA{$p2}=$p3;
} elsif ($p1 eq "Runas_Alias") {
$RA{$p2}=$p3;
} else {
if (!$did_defaults++){
# do this once
##print "dn: cn=defaults,$base\n";
##print "objectClass: top\n";
##print "objectClass: sudoRole\n";
##print "cn: defaults\n";
##print "description: Default sudoOption's go here\n";
##print "sudoOption: $_\n" foreach @options;
print '<sudoOptions xmlns="http://freeipa.org/xml/rng/sudo/sudoOptions/1.0" ';
#print "$_ " foreach @options;
foreach ( split /,/, (join ',', @options) ) {
$_ =~ s/=(.*)/=\"$1\"/;
print "$_ ";
}
print "/>\n";
print "\n";
}
# Definition
my @users=split /\s*,\s*/,$p1;
my @hosts=split /\s*,\s*/,$p2;
$p3 =~ s/\\,/\\#/g;
my @cmds= split /\s*,\s*/,$p3;
s/\\#/,/g foreach @cmds;
@options=();
foreach my $user (expand(\%UA, @users)) {
my $type="user";
$type="posixGroup" if $user =~ s/^%//;
$type="netgroup" if $user =~ s/^\+//;
print "<$type $user_group_namespaces{$type} $user_group_attributename{$type}=\"$user\">\n";
tl(1);
# only "global" user options here!!!
#if (@options) {
# print tl() . '<sudoOptions xmlns="http://freeipa.org/xml/rng/sudo/sudoOptions/1.0"';
# print "$_ " foreach @options;
# print "/>\n";
#}
print tl() . '<sudoers xmlns="http://freeipa.org/xml/rng/sudo/sudoers/1.0">'."\n";
tl(1);
#print Dumper(%CA, @cmds);
my @mycmds=@cmds;
#foreach my $command (expand(\%CA,@cmds)) {
foreach my $command (@mycmds) {
my $runas='';
if ( $command =~ s/^\(([^\)]+)\)\s*//) {
$runas .= "<runas>$_</runas>" foreach expand(\%RA, split(/,\s*/, $1));
}
foreach (expand(\%CA,$command)) {
my $tag='';
if (@options) {
$tag = '<tag>';
$tag .= "$_ " foreach @options;
$tag =~ s/ $/<\/tag>/;
}
print tl() . "<command><path>$_</path>$tag$runas</command>\n"
}
@options=();
}
tl(-1);
print tl() . "</sudoers>\n";
tl(-1);
##print "dn: cn=$users[0],$base\n";
##print "objectClass: top\n";
##print "objectClass: sudoRole\n";
##print "cn: $users[0]\n";
# will clobber options
##print "sudoUser: $_\n" foreach expand(\%UA,@users);
##print "sudoHost: $_\n" foreach expand(\%HA,@hosts);
##my $runas = undef;
##foreach (@cmds) {
##if (s/^\(([^\)]+)\)\s*//) {
##print "sudoRunas: $_\n" foreach expand(\%UA, split(/,\s*/, $1));
##}
##}
##print "sudoCommand: $_\n" foreach expand(\%CA,@cmds);
##print "sudoOption: $_\n" foreach @options;
print "</$type>\n";
print "\n";
}
}
} else {
print "parse error: $_\n";
}
}
print '</ipa>'."\n";
#
# recursively expand hash elements
sub expand{
my $ref=shift;
my @a=();
# preen the line a little
foreach (@_){
# if NOPASSWD: directive found, mark entire entry as not requiring
s/NOPASSWD:\s*// && push @options,'NOPASSWD';
s/PASSWD:\s*// && push @options,'PASSWD';
s/NOEXEC:\s*// && push @options,"NOEXEC";
s/EXEC:\s*// && push @options,"EXEC";
s/SETENV:\s*// && push @options,"SETENV";
s/NOSETENV:\s*// && push @options,"NOSETENV";
s/\w+://; # silently remove other directives
s/\s+$//; # right trim
}
# do the expanding
#push @a,$ref->{$_} ? expand($ref,split /\s*,\s*/,$ref->{$_}):$_ foreach @_;
foreach (@_) {
if ( s/^!// ) {
my @dummy = $ref->{$_} ? expand($ref,split /\s*,\s*/,$ref->{$_}):$_;
s/^/!/ foreach @dummy;
push @a, @dummy;
} else {
push @a, $ref->{$_} ? expand($ref,split /\s*,\s*/,$ref->{$_}):$_;
}
}
@a;
}
sub tl {
my $d = @_?$_[0]:0;
state $tablevel=0;
#print $d."\n";
#print "t=" . $tablevel."\n";
$tablevel += $d;
#print "t2=" . $tablevel."\n";
$tablevel=0 if ( $tablevel < 0 );
#print "t3=" . $tablevel."\n";
return "\t" x $tablevel;
}
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