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#!/usr/bin/env perl
use strict;
#
# Converts a sudoers file to LDIF format in prepration for loading into
# the LDAP server.
#
# 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)
#
# CAVEATS:
# Sudoers entries can have multiple RunAs entries that override former ones,
# with LDAP sudoRunAs{Group,User} applies to all commands in a sudoRole
my %RA;
my %UA;
my %HA;
my %CA;
my $base=$ENV{SUDOERS_BASE} or die "$0: Container SUDOERS_BASE undefined\n";
my @options=();
my $did_defaults=0;
# 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,$opt;
} elsif (/^(\S+)\s+(.+)=\s*(.*)/) {
# Aliases or Definitions
my ($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 "Runas_Alias") {
$RA{$p2}=$p3;
} elsif ($p1 eq "Host_Alias") {
$HA{$p2}=$p3;
} elsif ($p1 eq "Cmnd_Alias") {
$CA{$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: $_\n" foreach @options;
print "\n";
}
# Definition
my @users=split /\s*,\s*/,$p1;
my @hosts=split /\s*,\s*/,$p2;
my @cmds= split /\s*,\s*/,$p3;
@options=();
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);
foreach (@cmds) {
if (s/^\(([^\)]+)\)\s*//) {
my @runas = split(/:\s*/, $1);
if (defined($runas[0])) {
print "sudoRunAsUser: $_\n" foreach expand(\%RA, split(/,\s*/, $runas[0]));
}
if (defined($runas[1])) {
print "sudoRunAsGroup: $_\n" foreach expand(\%RA, split(/,\s*/, $runas[1]));
}
}
}
print "sudoCommand: $_\n" foreach expand(\%CA,@cmds);
print "sudoOption: $_\n" foreach @options;
print "\n";
}
} else {
print "parse error: $_\n";
}
}
#
# recursively expand hash elements
sub expand{
my $ref=shift;
my @a=();
# preen the line a little
foreach (@_){
# if NOPASSWD: directive found, mark entire entry as not requiring
s/NOPASSWD:\s*// && push @options,"!authenticate";
s/PASSWD:\s*// && push @options,"authenticate";
s/NOEXEC:\s*// && push @options,"noexec";
s/EXEC:\s*// && push @options,"!noexec";
s/SETENV:\s*// && push @options,"setenv";
s/NOSETENV:\s*// && push @options,"!setenv";
s/\w+://; # silently remove other directives
s/\s+$//; # right trim
}
# do the expanding
push @a,$ref->{$_} ? expand($ref,split /\s*,\s*/,$ref->{$_}):$_ foreach @_;
@a;
}
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