From ff6480cd15fcb6e3bbe66efe3f061fde611a537c Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Fri, 3 Jul 2009 20:15:36 -0400 Subject: [PATCH] Initial import (0.5 release) --- COPYING | 340 ++++++++++++++++++++++++++++++++++++++++ Changelog | 19 +++ README | 102 ++++++++++++ dnsdusty | 336 +++++++++++++++++++++++++++++++++++++++ dnsdusty.conf | 31 ++++ dnsdusty.list | 45 ++++++ templates/addform.tmpl | 27 ++++ templates/delform.tmpl | 18 +++ templates/zoneform.tmpl | 20 +++ 9 files changed, 938 insertions(+) create mode 100644 COPYING create mode 100644 Changelog create mode 100644 README create mode 100755 dnsdusty create mode 100644 dnsdusty.conf create mode 100644 dnsdusty.list create mode 100644 templates/addform.tmpl create mode 100644 templates/delform.tmpl create mode 100644 templates/zoneform.tmpl diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..5b6e7c6 --- /dev/null +++ b/COPYING @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/Changelog b/Changelog new file mode 100644 index 0000000..89b2c15 --- /dev/null +++ b/Changelog @@ -0,0 +1,19 @@ +dnsdusty (0.5) + + * Interface overhaul -- everything on one page now. No separate webpages. + * Code cleanup, better use of subroutines. + + -- Jeffrey Layton Fri, 26 Mar 2004 13:00:52 -0500 + +dnsdusty (0.4) + + * Add in support for per-zone authorization. Depends on HTTP Auth. + + -- Jeffrey Layton Fri, 26 Mar 2004 13:00:52 -0500 + +dnsdusty (0.3) + + * First public release! + + -- Jeffrey Layton Sat, 21 Feb 2004 08:19:11 -0500 + diff --git a/README b/README new file mode 100644 index 0000000..2ffc142 --- /dev/null +++ b/README @@ -0,0 +1,102 @@ +Welcome to the DNSDusty program. + +Setting up BIND for dynamic updates: + +You'll need to set up BIND so that it accepts signed dynamic updates for your +zone. Here's an overview: + +1) generate a key using dnssec-keygen. For instance: + + % dnssec-keygen -b 256 -n HOST -a HMAC-MD5 example + + this will create 2 files, both containing the same key in different + formats. + +2) add this key to your named.conf file in a stanza like this: + + key "DNSDusty" { + algorithm hmac-md5; + secret "0QI/OEYtZA5aI6rpMTwrodfMpg1xxCaDHdR/tvI9Lgc="; + }; + +3) For each zone that you want to manage with DNSDusty, add this keyname to + both your 'allow-update' and 'allow-transfer' lists: + + zone "example.com" { + type master; + file "/etc/bind/db.example" + allow-update { key DNSDusty; }; + allow-transfer { key DNSDusty; }; + } + +4) reload named to make it see your new configuration. + +Prerequisites: + +DNSDusty requires the following non-standard perl modules: + + Net::DNS + CGI::FormBuilder + HTML::Template + +Make sure these are installed prior to getting the software working. + +Installing DNSDusty: + +DNSDusty comes set up to be installed according to the Debian packaging +guidelines. The sources also come with an EPM listfile. If you have the EPM +program installed (see http://www.easysw.com), then you should be able to +package the software by running: + + % epm -v -f native dnsdusty + +Once you generate the package, install it with your OS's installation tool. + +You'll then need to modify the config file, which is by default: + +/etc/dnsdusty/dnsdusty.conf. + +The config file should only be writable by root, and only readable by the +user that your webserver runs as. Since it contains the key to allow updates +to your webserver, make sure that you secure it well, unless you want the +world to be able to update your server. + +Setting up Apache: + +DNSDusty doesn't have any authentication built in, so you'll need to secure it +at the webserver level. I use Apache2 for my webserver, and only allow access +to DNSDusty from the SSL-enabled section (this keeps passwords from being sent +in cleartext). I use the mod-auth-pam and mod-auth-sys-group modules to +authenticate users with system level authentication on my setup. + +Here is the relevant stanza from an example apache config. This should be +inside a VirtualHost section for the SSL-enabled section of the site. + +ScriptAlias /dnsdusty/cgi-bin/ /usr/lib/dnsdusty/cgi-bin/ + + SSLOptions +StdEnvVars + AllowOverride None + Options ExecCGI + Order allow,deny + Allow from 10.10.10.0 + Deny from All + AuthPAM_Enabled on + AuthGROUP_Enabled on + AuthType Basic + AuthName "DNSDusty" + require group dnsadmins + + +The per-zone authorization depends on having a valid $REMOTE_USER environment +variable, so if you plan to use this feature, then HTTP Authentication is +required. + +Problems, Questions and Patches: + +If you have problems, questions, suggestions or patches, then I can be +contacted via email at: + + jtlayton@poochiereds.net + + +Enjoy! diff --git a/dnsdusty b/dnsdusty new file mode 100755 index 0000000..a3870c3 --- /dev/null +++ b/dnsdusty @@ -0,0 +1,336 @@ +#!/usr/bin/perl -w + +# +# dnsdusty -- CGI program to add and remove records from DNS using +# dynamic updates +# +# Copyright (c) 2004, Jeffrey Layton +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# 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. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +# + +# $Id: dnsdusty 127 2004-12-23 13:43:11Z jtlayton $ + +use CGI; +use CGI::FormBuilder; +use Net::DNS; + +# include the configuration +require '/etc/dnsdusty/dnsdusty.conf'; + +# make my pipes piping hot +$| = 1; + +# create CGI object +$q = CGI->new; + +# print header +print $q->header; + +# run the main routine +&main; + +# build list of zones that a user is allowed to modify. If user is unset +# return all the allowed zones. +sub get_allowed_zones { + my $user = shift; + my @allowed_zones = (); + if ($user) { + foreach my $zone (@zones) { + if (exists $users{$zone}) { + foreach my $allowed_user (@{$users{$zone}}) { + if ($user eq $allowed_user) { + push(@allowed_zones,$zone); + last; + } + } + } else { + push(@allowed_zones,$zone); + } + } + } else { + @allowed_zones = @zones; + } + return @allowed_zones; +} + +sub get_resolver_object { + my ($tsig_keyname,$tsig_key) = @_; + my $res = Net::DNS::Resolver->new; + $res->tsig($tsig_keyname,$tsig_key); + return \$res; +} + + +sub zone_transfer { + my ($res,$zone,$class) = @_; + my @rr = (); + my @zonerecs = ${$res}->axfr($zone,$class); + foreach my $record (@zonerecs) { + next if ($record->type eq 'SOA'); + push (@rr,$record->string); + } + my @sortedrr = sort(@rr); + return \@sortedrr; +} + +sub add_records { + my ($res,$zone,$class,$name,$ttl,$type,$content) = @_; + + # create update packet + my $update = Net::DNS::Update->new($zone,$class); + my $rr = "$name.$zone $ttl $type $content"; + $update->push(update => rr_add($rr)); + my $reply = ${$res}->send($update); + + # initialize return vars + my $success = 0; + my $message = ''; + + # Did it work? + if ($reply) { + if ($reply->header->rcode eq 'NOERROR') { + $message = "Update succeeded"; + $success = 1; + } else { + $message = 'Update failed: ' . $reply->header->rcode; + } + } else { + $message = 'Update failed: ' . $res->errorstring; + } + + return ($success,$message); +} + +sub del_records { + my ($res,$zone,$class,@rr) = @_; + + my $update = Net::DNS::Update->new($zone,$class); + + # build update packet(s) + foreach $record (@rr) { + $update->push(update => rr_del($record)); + } + + # send it + my $reply = ${$res}->send($update); + + my $msg = ''; + my $success = 0; + if ($reply) { + if ($reply->header->rcode eq 'NOERROR') { + $msg = "Update succeeded"; + $success = 1; + } else { + $msg = 'Update failed: ' . $reply->header->rcode; + $success = 0; + } + } else { + $msg = 'Update failed: ' . $res->errorstring; + $success = 0; + } + return ($success,$msg); +} + +sub main { + my @allowed_zones = &get_allowed_zones($ENV{REMOTE_USER}); + + # form for selecting zone + my $zone_form = CGI::FormBuilder->new( method => 'POST', + fields => [ qw( zone class ) ], + validate => { zone => \@allowed_zones, + class => \@classes }, + smartness => 0, + template => "$templatedir/zoneform.tmpl", + params => $query, + keepextras => 1, + name => 'zoneform', + messages => { form_submit_default => "Select New Zone" } + ); + + + + # construct the form for adding records + my $add_form = CGI::FormBuilder->new( method => 'POST', + fields => [ qw( name ttl type content zone class ) ], + validate => { name => 'HOST', + ttl => 'INT', + types => \@types, + zone => \@allowed_zones, + class => \@classes }, + smartness=>0, + template=>"$templatedir/addform.tmpl", + params=>$query, + keepextras=>1, + name => 'addform', + messages => { form_submit_default => "Add Record" } + ); + + + # set field attributes + $add_form->field(name => 'name', + size => 16, + maxlength => 128); + + $add_form->field(name => 'ttl', + size => 8, + maxlength => 8); + + $add_form->field(name => 'type', + type => 'select', + options => \@types); + + $add_form->field(name => 'content', + size => 32, + maxlength => 255); + + $add_form->field(name => 'zone'); + + $add_form->field(name => 'class'); + + # construct the form for deleting records + my $del_form = CGI::FormBuilder->new ( method=>'POST', + fields=>[ qw( zone class rr ) ], + validate=>{ zone=>\@allowed_zones, + class=>\@classes }, + smartness=>0, + template=>"$templatedir/delform.tmpl", + params=>$query, + keepextras=>1, + name => 'delform', + messages => { form_submit_default => "Delete Selected Records" } + ); + + $del_form->field(name=>'class', + type=>'hidden'); + + $del_form->field(name=>'zone', + type=>'hidden'); + + $del_form->field(name=>'rr', + type=>'checkbox', + multiple=>1); + + my $zone = $allowed_zones[0]; + my $class = $classes[0]; + my $ttl = $default_ttl; + my $type = $types[0]; + my $message = ''; + my $success = 1; + + # get a resolver handle + my $resref = &get_resolver_object($tsig_keyname,$tsig_key); + + # get zone and class out of whatever form was submitted + if ( $zone_form->submitted and $zone_form->validate ) { + $zone = $zone_form->field('zone'); + $class = $zone_form->field('class'); + } elsif ( $add_form->submitted and $add_form->validate ) { + $zone = $add_form->field('zone'); + $class = $add_form->field('class'); + $ttl = $add_form->field('ttl'); + $type = $add_form->field('type'); + ($success,$message) = &add_records( $resref, + $zone, + $class, + $add_form->field('name'), + $ttl, + $type, + $add_form->field('content') ); + + } elsif ( $del_form->submitted and $del_form->validate ) { + $zone = $del_form->field('zone'); + $class = $del_form->field('class'); + @rr = $del_form->field('rr'); + ($success,$message) = &del_records( $resref, + $zone, + $class, + @rr ); + } + + $zone_form->field(name => 'zone', + type => 'select', + value => $zone, + options => \@allowed_zones ); + + $zone_form->field(name => 'class', + type => 'select', + value => $class, + options => \@classes); + + # throw an error alert box if the last update was not successful + if (! $success) { + $zone_form->tmpl_param( message => $message ); + } + + print $zone_form->render; + + $add_form->field(name => 'name', + size => 16, + maxlength => 128, + value => '', + force => 1 ); + + $add_form->field(name => 'content', + size => 32, + maxlength => 255, + value => '', + force => 1 ); + + $add_form->field(name => 'ttl', + size => 8, + value => $ttl, + maxlength => 8); + + $add_form->field(name => 'type', + type => 'select', + value => $type, + options => \@types); + + $add_form->field(name => 'zone', + type => 'hidden', + value => $zone); + + $add_form->field(name => 'class', + type => 'hidden', + value => $class); + + $add_form->tmpl_param(zone => $zone); + $add_form->tmpl_param(class => $class); + + print $add_form->render; + + $del_form->field(name => 'zone', + type => 'hidden', + value => $zone); + + $del_form->field(name => 'class', + type => 'hidden', + value => $class); + + $del_form->tmpl_param( zone => $zone ); + $del_form->tmpl_param( class => $class ); + + my $rropts = &zone_transfer($resref,$zone,$class); + + $del_form->field(name=>'rr', + type=>'checkbox', + multiple=>1, + options=>$rropts); + + print $del_form->render; + +} + diff --git a/dnsdusty.conf b/dnsdusty.conf new file mode 100644 index 0000000..027a193 --- /dev/null +++ b/dnsdusty.conf @@ -0,0 +1,31 @@ +# +# Configuration for DNSDusty. This should be in perl-format. +# + +# zones we can manage +@zones = ( 'example.com.', + '10.in-addr.arpa.' ); + +# users allowed to modify each zone. If there is no entry in this hash +# for a zone, then it's accessable by anyone. These users must match the +# HTTP authentication usernames. Using this pretty much requires you to use +# HTTP auth. +%users = ( 'example.com' => [ 'alice', 'bob' ], + '10.in-addr.arpa' => [ 'alice', 'bob' ] ); + +# allowed record types +@types = ( 'A', 'PTR', 'CNAME', 'TXT' ); + +# allowed classes +@classes = ( 'IN' ); + +# default TTL for new records +$default_ttl = 86400; + +# tsig info. Add your key here: +$tsig_keyname = 'DNSDusty'; +$tsig_key = '0QI/OEYtZA5aI6rpMTwrodfMpg1xxCaDHdR/tvI9Lgc='; + +# template file location +$templatedir = '/home/jtlayton/svn/dnsdusty/templates'; + diff --git a/dnsdusty.list b/dnsdusty.list new file mode 100644 index 0000000..46b46e5 --- /dev/null +++ b/dnsdusty.list @@ -0,0 +1,45 @@ +# +# "$Id$" +# + +# Directories... +$prefix=/usr +$exec_prefix=/usr +$datadir=/usr/share +$tmpldir=${datadir}/dnsdusty/templates +$docdir=/usr/share/doc/dnsdusty +$libdir=/usr/lib/dnsdusty +$cgidir=${libdir}/cgi-bin +$sysconfdir=/etc/dnsdusty +$srcdir=. + +# user info +$webgroup=www-data + +# Product information +%product DNSDusty +%copyright 2004 by Jeffrey Layton, all rights reserved. +%vendor http://www.poochiereds.net/dnsdusty +%license ${srcdir}/COPYING +%readme ${srcdir}/README +%description Web-Based DDNS Management Tool +%version 0.5 + +# CGI programs +%system all +d 0755 root sys ${cgidir} - +f 0754 root ${webgroup} ${cgidir}/dnsdusty ${srcdir}/dnsdusty + +# templates +d 0755 root sys ${tmpldir} - +f 0644 root sys ${tmpldir} ${srcdir}/templates/* + +# Documentation +d 0755 root sys ${docdir} - +f 0444 root sys ${docdir}/README $srcdir/README +f 0444 root sys ${docdir}/COPYING $srcdir/COPYING + +# config file +d 0755 root sys ${sysconfdir} - +f 0640 root ${webgroup} ${sysconfdir}/dnsdusty.conf $srcdir/dnsdusty.conf + diff --git a/templates/addform.tmpl b/templates/addform.tmpl new file mode 100644 index 0000000..f01e385 --- /dev/null +++ b/templates/addform.tmpl @@ -0,0 +1,27 @@ + +
+ + + + + + + + + + + + + + + + + + + + +
Record KeyZoneTTLClassTypeContent
+

+ + + diff --git a/templates/delform.tmpl b/templates/delform.tmpl new file mode 100644 index 0000000..502198e --- /dev/null +++ b/templates/delform.tmpl @@ -0,0 +1,18 @@ + +

+ + + + + + + + + + +
Delete?Record
+

+ + + + diff --git a/templates/zoneform.tmpl b/templates/zoneform.tmpl new file mode 100644 index 0000000..c70b346 --- /dev/null +++ b/templates/zoneform.tmpl @@ -0,0 +1,20 @@ + + + +DNSDusty + + + +

DNSDusty

+

+ + +

+ + + -- 2.34.1