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# -*- Mode: perl; indent-tabs-mode: nil -*-
#
# The contents of this file are subject to the Mozilla Public
# License Version 1.1 (the "License"); you may not use this file
# except in compliance with the License. You may obtain a copy of
# the License at http://www.mozilla.org/MPL/
#
# Software distributed under the License is distributed on an "AS
# IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
# implied. See the License for the specific language governing
# rights and limitations under the License.
#
# The Original Code are the Bugzilla tests.
#
# The Initial Developer of the Original Code is Jacob Steenhagen.
# Portions created by Jacob Steenhagen are
# Copyright (C) 2001 Jacob Steenhagen. All
# Rights Reserved.
#
# Contributor(s): Gervase Markham <gerv@gerv.net>
#################
#Bugzilla Test 8#
#####filter######
# This test scans all our templates for every directive. Having eliminated
# those which cannot possibly cause XSS problems, it then checks the rest
# against the safe list stored in the filterexceptions.pl file.
# Sample exploit code: '>"><script>alert('Oh dear...')</script>
use strict;
use lib 't';
use vars qw(%safe);
use Support::Templates;
use File::Spec 0.82;
use Test::More tests => $Support::Templates::num_actual_files;
use Cwd;
# Undefine the record separator so we can read in whole files at once
my $oldrecsep = $/;
$/ = undef;
my $topdir = cwd;
foreach my $path (@Support::Templates::include_paths) {
$path =~ m|template/([^/]+)/|;
my $lang = $1;
chdir $topdir; # absolute path
my @testitems = Support::Templates::find_actual_files($path);
next unless @testitems;
# Some people require this, others don't. No-one knows why.
chdir $path; # relative path
# We load a %safe list of acceptable exceptions.
if (!-r "filterexceptions.pl") {
ok(0, "$path has templates but no filterexceptions.pl file. --ERROR");
next;
}
else {
do "filterexceptions.pl";
}
# We preprocess the %safe hash of lists into a hash of hashes. This allows
# us to flag which members were not found, and report that as a warning,
# thereby keeping the lists clean.
foreach my $file (keys %safe) {
my $list = $safe{$file};
$safe{$file} = {};
foreach my $directive (@$list) {
$safe{$file}{$directive} = 0;
}
}
foreach my $file (@testitems) {
# There are some files we don't check, because there is no need to
# filter their contents due to their content-type.
if ($file =~ /\.(txt|png)\.tmpl$/) {
ok(1, "($lang) $file is filter-safe");
next;
}
# Read the entire file into a string
open (FILE, "<$file") || die "Can't open $file: $!\n";
my $slurp = <FILE>;
close (FILE);
my @unfiltered;
# /g means we execute this loop for every match
# /s means we ignore linefeeds in the regexp matches
while ($slurp =~ /\[%(.*?)%\]/gs) {
my $directive = $1;
my @lineno = ($` =~ m/\n/gs);
my $lineno = scalar(@lineno) + 1;
# Comments
next if $directive =~ /^[+-]?#/;
# Remove any leading/trailing + or - and whitespace.
$directive =~ s/^[+-]?\s*//;
$directive =~ s/\s*[+-]?$//;
# Directives
next if $directive =~ /^(IF|END|UNLESS|FOREACH|PROCESS|INCLUDE|
BLOCK|USE|ELSE|NEXT|LAST|DEFAULT|FLUSH|
ELSIF|SET|SWITCH|CASE)/x;
# Simple assignments
next if $directive =~ /^[\w\.\$]+\s+=\s+/;
# Conditional literals with either sort of quotes
# There must be no $ in the string for it to be a literal
next if $directive =~ /^(["'])[^\$]*[^\\]\1/;
# Special values always used for numbers
next if $directive =~ /^[ijkn]$/;
next if $directive =~ /^count$/;
# Params
next if $directive =~ /^Param\(/;
# Other functions guaranteed to return OK output
next if $directive =~ /^(time2str|GetBugLink)\(/;
# Safe Template Toolkit virtual methods
next if $directive =~ /\.(size)$/;
# Special Template Toolkit loop variable
next if $directive =~ /^loop\.(index|count)$/;
# Things which are already filtered
# Note: If a single directive prints two things, and only one is
# filtered, we may not catch that case.
next if $directive =~ /FILTER\ (html|csv|js|url_quote|quoteUrls|
time|uri|xml)/x;
# Exclude those on the nofilter list
if (defined($safe{$file}{$directive})) {
$safe{$file}{$directive}++;
next;
};
# This intentionally makes no effort to eliminate duplicates; to do
# so would merely make it more likely that the user would not
# escape all instances when attempting to correct an error.
push(@unfiltered, "$lineno:$directive");
}
my $fullpath = File::Spec->catfile($path, $file);
if (@unfiltered) {
my $uflist = join("\n ", @unfiltered);
ok(0, "($lang) $fullpath has unfiltered directives:\n $uflist\n--ERROR");
}
else {
# Find any members of the exclusion list which were not found
my @notfound;
foreach my $directive (keys %{$safe{$file}}) {
push(@notfound, $directive) if ($safe{$file}{$directive} == 0);
}
if (@notfound) {
my $nflist = join("\n ", @notfound);
ok(0, "($lang) $fullpath - FEL has extra members:\n $nflist\n" .
"--WARNING");
}
else {
# Don't use the full path here - it's too long and unwieldy.
ok(1, "($lang) $file is filter-safe");
}
}
}
}
$/ = $oldrecsep;
exit 0;
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