#!./perl -T
#
# Taint tests by Tom Phoenix <rootbeer@teleport.com>.
#
# I don't claim to know all about tainting. If anyone sees
# tests that I've missed here, please add them. But this is
# better than having no tests at all, right?
#
BEGIN {
chdir 't' if -d 't';
@INC = '../lib';
require './test.pl';
skip_all_if_miniperl("no dynamic loading on miniperl, no re");
}
use strict;
use Config;
plan tests => 797;
$| = 1;
use vars qw($ipcsysv); # did we manage to load IPC::SysV?
my ($old_env_path, $old_env_dcl_path, $old_env_term);
BEGIN {
$old_env_path = $ENV{'PATH'};
$old_env_dcl_path = $ENV{'DCL$PATH'};
$old_env_term = $ENV{'TERM'};
if ($^O eq 'VMS' && !defined($Config{d_setenv})) {
$ENV{PATH} = $ENV{PATH};
$ENV{TERM} = $ENV{TERM} ne ''? $ENV{TERM} : 'dummy';
}
if ($Config{'extensions'} =~ /\bIPC\/SysV\b/
&& ($Config{d_shm} || $Config{d_msg})) {
eval { require IPC::SysV };
unless ($@) {
$ipcsysv++;
IPC::SysV->import(qw(IPC_PRIVATE IPC_RMID IPC_CREAT S_IRWXU IPC_NOWAIT));
}
}
}
my $Is_VMS = $^O eq 'VMS';
my $Is_MSWin32 = $^O eq 'MSWin32';
my $Is_NetWare = $^O eq 'NetWare';
my $Is_Dos = $^O eq 'dos';
my $Is_Cygwin = $^O eq 'cygwin';
my $Is_OpenBSD = $^O eq 'openbsd';
my $Is_MirBSD = $^O eq 'mirbsd';
my $Invoke_Perl = $Is_VMS ? 'MCR Sys$Disk:[]Perl.exe' :
$Is_MSWin32 ? '.\perl' :
$Is_NetWare ? 'perl' :
'./perl' ;
my @MoreEnv = qw/IFS CDPATH ENV BASH_ENV/;
if ($Is_VMS) {
my (%old, $x);
for $x ('DCL$PATH', @MoreEnv) {
($old{$x}) = $ENV{$x} =~ /^(.*)$/ if exists $ENV{$x};
}
# VMS note: PATH and TERM are automatically created by the C
# library in VMS on reference to the their keys in %ENV.
# There is currently no way to determine if they did not exist
# before this test was run.
eval <<EndOfCleanup;
END {
\$ENV{PATH} = \$old_env_path;
warn "# Note: logical name 'PATH' may have been created\n";
\$ENV{'TERM'} = \$old_env_term;
warn "# Note: logical name 'TERM' may have been created\n";
\@ENV{keys %old} = values %old;
if (defined \$old_env_dcl_path) {
\$ENV{'DCL\$PATH'} = \$old_env_dcl_path;
} else {
delete \$ENV{'DCL\$PATH'};
}
}
EndOfCleanup
}
# Sources of taint:
# The empty tainted value, for tainting strings
my $TAINT = substr($^X, 0, 0);
# A tainted zero, useful for tainting numbers
my $TAINT0;
{
no warnings;
$TAINT0 = 0 + $TAINT;
}
# This taints each argument passed. All must be lvalues.
# Side effect: It also stringifies them. :-(
sub taint_these (@) {
for (@_) { $_ .= $TAINT }
}
# How to identify taint when you see it
sub tainted ($) {
local $@; # Don't pollute caller's value.
not eval { join("",@_), kill 0; 1 };
}
sub is_tainted {
my $thing = shift;
local $::Level = $::Level + 1;
ok(tainted($thing), @_);
}
sub isnt_tainted {
my $thing = shift;
local $::Level = $::Level + 1;
ok(!tainted($thing), @_);
}
sub violates_taint {
my ($code, $what, $desc) = @_;
$desc //= $what;
local $::Level = $::Level + 1;
is(eval { $code->(); }, undef, $desc);
like($@, qr/^Insecure dependency in $what while running with -T switch/);
}
# We need an external program to call.
my $ECHO = ($Is_MSWin32 ? ".\\echo$$" : ($Is_NetWare ? "echo$$" : "./echo$$"));
END { unlink $ECHO }
open my $fh, '>', $ECHO or die "Can't create $ECHO: $!";
print $fh 'print "@ARGV\n"', "\n";
close $fh;
my $echo = "$Invoke_Perl $ECHO";
my $TEST = 'TEST';
# First, let's make sure that Perl is checking the dangerous
# environment variables. Maybe they aren't set yet, so we'll
# taint them ourselves.
{
$ENV{'DCL$PATH'} = '' if $Is_VMS;
$ENV{PATH} = ($Is_Cygwin) ? '/usr/bin' : '';
delete @ENV{@MoreEnv};
$ENV{TERM} = 'dumb';
is(eval { `$echo 1` }, "1\n");
SKIP: {
skip "Environment tainting tests skipped", 4
if $Is_MSWin32 || $Is_NetWare || $Is_VMS || $Is_Dos;
my @vars = ('PATH', @MoreEnv);
while (my $v = $vars[0]) {
local $ENV{$v} = $TAINT;
last if eval { `$echo 1` };
last unless $@ =~ /^Insecure \$ENV\{$v}/;
shift @vars;
}
is("@vars", "");
# tainted $TERM is unsafe only if it contains metachars
local $ENV{TERM};
$ENV{TERM} = 'e=mc2';
is(eval { `$echo 1` }, "1\n");
$ENV{TERM} = 'e=mc2' . $TAINT;
is(eval { `$echo 1` }, undef);
like($@, qr/^Insecure \$ENV\{TERM}/);
}
my $tmp;
if ($^O eq 'os2' || $^O eq 'amigaos' || $Is_MSWin32 || $Is_NetWare || $Is_Dos) {
print "# all directories are writeable\n";
}
else {
$tmp = (grep { defined and -d and (stat _)[2] & 2 }
qw(sys$scratch /tmp /var/tmp /usr/tmp),
@ENV{qw(TMP TEMP)})[0]
or print "# can't find world-writeable directory to test PATH\n";
}
SKIP: {
skip "all directories are writeable", 2 unless $tmp;
local $ENV{PATH} = $tmp;
is(eval { `$echo 1` }, undef);
like($@, qr/^Insecure directory in \$ENV\{PATH}/);
}
SKIP: {
skip "This is not VMS", 4 unless $Is_VMS;
$ENV{'DCL$PATH'} = $TAINT;
is(eval { `$echo 1` }, undef);
like($@, qr/^Insecure \$ENV\{DCL\$PATH}/);
SKIP: {
skip q[can't find world-writeable directory to test DCL$PATH], 2
unless $tmp;
$ENV{'DCL$PATH'} = $tmp;
is(eval { `$echo 1` }, undef);
like($@, qr/^Insecure directory in \$ENV\{DCL\$PATH}/);
}
$ENV{'DCL$PATH'} = '';
}
}
# Let's see that we can taint and untaint as needed.
{
my $foo = $TAINT;
is_tainted($foo);
# That was a sanity check. If it failed, stop the insanity!
die "Taint checks don't seem to be enabled" unless tainted $foo;
$foo = "foo";
isnt_tainted($foo);
taint_these($foo);
is_tainted($foo);
my @list = 1..10;
isnt_tainted($_) foreach @list;
taint_these @list[1,3,5,7,9];
is_tainted($_) foreach @list[1,3,5,7,9];
isnt_tainted($_) foreach @list[0,2,4,6,8];
($foo) = $foo =~ /(.+)/;
isnt_tainted($foo);
my ($desc, $s, $res, $res2, $one);
$desc = "match with string tainted";
$s = 'abcd' . $TAINT;
$res = $s =~ /(.+)/;
$one = $1;
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res not tainted");
isnt_tainted($one, "$desc: \$1 not tainted");
is($res, 1, "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "match /g with string tainted";
$s = 'abcd' . $TAINT;
$res = $s =~ /(.)/g;
$one = $1;
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res not tainted");
isnt_tainted($one, "$desc: \$1 not tainted");
is($res, 1, "$desc: res value");
is($one, 'a', "$desc: \$1 value");
$desc = "match with string tainted, list cxt";
$s = 'abcd' . $TAINT;
($res) = $s =~ /(.+)/;
$one = $1;
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res not tainted");
isnt_tainted($one, "$desc: \$1 not tainted");
is($res, 'abcd', "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "match /g with string tainted, list cxt";
$s = 'abcd' . $TAINT;
($res, $res2) = $s =~ /(.)/g;
$one = $1;
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res not tainted");
isnt_tainted($res2,"$desc: res2 not tainted");
isnt_tainted($one, "$desc: \$1 not tainted");
is($res, 'a', "$desc: res value");
is($res2,'b', "$desc: res2 value");
is($one, 'd', "$desc: \$1 value");
$desc = "match with pattern tainted";
$s = 'abcd';
$res = $s =~ /$TAINT(.+)/;
$one = $1;
isnt_tainted($s, "$desc: s not tainted");
isnt_tainted($res, "$desc: res not tainted");
is_tainted($one, "$desc: \$1 tainted");
is($res, 1, "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "match /g with pattern tainted";
$s = 'abcd';
$res = $s =~ /$TAINT(.)/g;
$one = $1;
isnt_tainted($s, "$desc: s not tainted");
isnt_tainted($res, "$desc: res not tainted");
is_tainted($one, "$desc: \$1 tainted");
is($res, 1, "$desc: res value");
is($one, 'a', "$desc: \$1 value");
SKIP: {
skip 'No locale testing without d_setlocale', 10 if(!$Config{d_setlocale});
$desc = "match with pattern tainted via locale";
$s = 'abcd';
{
BEGIN {
if($Config{d_setlocale}) {
require locale; import locale;
}
}
$res = $s =~ /(\w+)/; $one = $1;
}
isnt_tainted($s, "$desc: s not tainted");
isnt_tainted($res, "$desc: res not tainted");
is_tainted($one, "$desc: \$1 tainted");
is($res, 1, "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "match /g with pattern tainted via locale";
$s = 'abcd';
{
BEGIN {
if($Config{d_setlocale}) {
require locale; import locale;
}
}
$res = $s =~ /(\w)/g; $one = $1;
}
isnt_tainted($s, "$desc: s not tainted");
isnt_tainted($res, "$desc: res not tainted");
is_tainted($one, "$desc: \$1 tainted");
is($res, 1, "$desc: res value");
is($one, 'a', "$desc: \$1 value");
}
$desc = "match with pattern tainted, list cxt";
$s = 'abcd';
($res) = $s =~ /$TAINT(.+)/;
$one = $1;
isnt_tainted($s, "$desc: s not tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($one, "$desc: \$1 tainted");
is($res, 'abcd', "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "match /g with pattern tainted, list cxt";
$s = 'abcd';
($res, $res2) = $s =~ /$TAINT(.)/g;
$one = $1;
isnt_tainted($s, "$desc: s not tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($one, "$desc: \$1 tainted");
is($res, 'a', "$desc: res value");
is($res2,'b', "$desc: res2 value");
is($one, 'd', "$desc: \$1 value");
SKIP: {
skip 'No locale testing without d_setlocale', 12 if(!$Config{d_setlocale});
$desc = "match with pattern tainted via locale, list cxt";
$s = 'abcd';
{
BEGIN {
if($Config{d_setlocale}) {
require locale; import locale;
}
}
($res) = $s =~ /(\w+)/; $one = $1;
}
isnt_tainted($s, "$desc: s not tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($one, "$desc: \$1 tainted");
is($res, 'abcd', "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "match /g with pattern tainted via locale, list cxt";
$s = 'abcd';
{
BEGIN {
if($Config{d_setlocale}) {
require locale; import locale;
}
}
($res, $res2) = $s =~ /(\w)/g; $one = $1;
}
isnt_tainted($s, "$desc: s not tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($res2, "$desc: res2 tainted");
is_tainted($one, "$desc: \$1 tainted");
is($res, 'a', "$desc: res value");
is($res2,'b', "$desc: res2 value");
is($one, 'd', "$desc: \$1 value");
}
$desc = "substitution with string tainted";
$s = 'abcd' . $TAINT;
$res = $s =~ s/(.+)/xyz/;
$one = $1;
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res not tainted");
isnt_tainted($one, "$desc: \$1 not tainted");
is($s, 'xyz', "$desc: s value");
is($res, 1, "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "substitution /g with string tainted";
$s = 'abcd' . $TAINT;
$res = $s =~ s/(.)/x/g;
$one = $1;
is_tainted($s, "$desc: s tainted");
is_tainted($res, "$desc: res tainted");
isnt_tainted($one, "$desc: \$1 not tainted");
is($s, 'xxxx', "$desc: s value");
is($res, 4, "$desc: res value");
is($one, 'd', "$desc: \$1 value");
$desc = "substitution /r with string tainted";
$s = 'abcd' . $TAINT;
$res = $s =~ s/(.+)/xyz/r;
$one = $1;
is_tainted($s, "$desc: s tainted");
is_tainted($res, "$desc: res tainted");
isnt_tainted($one, "$desc: \$1 not tainted");
is($s, 'abcd', "$desc: s value");
is($res, 'xyz', "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "substitution /e with string tainted";
$s = 'abcd' . $TAINT;
$one = '';
$res = $s =~ s{(.+)}{
$one = $one . "x"; # make sure code not tainted
isnt_tainted($one, "$desc: code not tainted within /e");
$one = $1;
isnt_tainted($one, "$desc: \$1 not tainted within /e");
"xyz";
}e;
$one = $1;
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res not tainted");
isnt_tainted($one, "$desc: \$1 not tainted");
is($s, 'xyz', "$desc: s value");
is($res, 1, "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "substitution with pattern tainted";
$s = 'abcd';
$res = $s =~ s/$TAINT(.+)/xyz/;
$one = $1;
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res not tainted");
is_tainted($one, "$desc: \$1 tainted");
is($s, 'xyz', "$desc: s value");
is($res, 1, "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "substitution /g with pattern tainted";
$s = 'abcd';
$res = $s =~ s/$TAINT(.)/x/g;
$one = $1;
is_tainted($s, "$desc: s tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($one, "$desc: \$1 tainted");
is($s, 'xxxx', "$desc: s value");
is($res, 4, "$desc: res value");
is($one, 'd', "$desc: \$1 value");
$desc = "substitution /ge with pattern tainted";
$s = 'abc';
{
my $i = 0;
my $j;
$res = $s =~ s{(.)$TAINT}{
$j = $i; # make sure code not tainted
$one = $1;
isnt_tainted($j, "$desc: code not tainted within /e");
$i++;
if ($i == 1) {
isnt_tainted($s, "$desc: s not tainted loop 1");
}
else {
is_tainted($s, "$desc: s tainted loop $i");
}
is_tainted($one, "$desc: \$1 tainted loop $i");
$i.$TAINT;
}ge;
$one = $1;
}
is_tainted($s, "$desc: s tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($one, "$desc: \$1 tainted");
is($s, '123', "$desc: s value");
is($res, 3, "$desc: res value");
is($one, 'c', "$desc: \$1 value");
$desc = "substitution /r with pattern tainted";
$s = 'abcd';
$res = $s =~ s/$TAINT(.+)/xyz/r;
$one = $1;
isnt_tainted($s, "$desc: s not tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($one, "$desc: \$1 tainted");
is($s, 'abcd', "$desc: s value");
is($res, 'xyz', "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
SKIP: {
skip 'No locale testing without d_setlocale', 18 if(!$Config{d_setlocale});
$desc = "substitution with pattern tainted via locale";
$s = 'abcd';
{
BEGIN {
if($Config{d_setlocale}) {
require locale; import locale;
}
}
$res = $s =~ s/(\w+)/xyz/; $one = $1;
}
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res not tainted");
is_tainted($one, "$desc: \$1 tainted");
is($s, 'xyz', "$desc: s value");
is($res, 1, "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "substitution /g with pattern tainted via locale";
$s = 'abcd';
{
BEGIN {
if($Config{d_setlocale}) {
require locale; import locale;
}
}
$res = $s =~ s/(\w)/x/g; $one = $1;
}
is_tainted($s, "$desc: s tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($one, "$desc: \$1 tainted");
is($s, 'xxxx', "$desc: s value");
is($res, 4, "$desc: res value");
is($one, 'd', "$desc: \$1 value");
$desc = "substitution /r with pattern tainted via locale";
$s = 'abcd';
{
BEGIN {
if($Config{d_setlocale}) {
require locale; import locale;
}
}
$res = $s =~ s/(\w+)/xyz/r; $one = $1;
}
isnt_tainted($s, "$desc: s not tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($one, "$desc: \$1 tainted");
is($s, 'abcd', "$desc: s value");
is($res, 'xyz', "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
}
$desc = "substitution with replacement tainted";
$s = 'abcd';
$res = $s =~ s/(.+)/xyz$TAINT/;
$one = $1;
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res not tainted");
isnt_tainted($one, "$desc: \$1 not tainted");
is($s, 'xyz', "$desc: s value");
is($res, 1, "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "substitution /g with replacement tainted";
$s = 'abcd';
$res = $s =~ s/(.)/x$TAINT/g;
$one = $1;
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res not tainted");
isnt_tainted($one, "$desc: \$1 not tainted");
is($s, 'xxxx', "$desc: s value");
is($res, 4, "$desc: res value");
is($one, 'd', "$desc: \$1 value");
$desc = "substitution /ge with replacement tainted";
$s = 'abc';
{
my $i = 0;
my $j;
$res = $s =~ s{(.)}{
$j = $i; # make sure code not tainted
$one = $1;
isnt_tainted($j, "$desc: code not tainted within /e");
$i++;
if ($i == 1) {
isnt_tainted($s, "$desc: s not tainted loop 1");
}
else {
is_tainted($s, "$desc: s tainted loop $i");
}
isnt_tainted($one, "$desc: \$1 not tainted within /e");
$i.$TAINT;
}ge;
$one = $1;
}
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res tainted");
isnt_tainted($one, "$desc: \$1 not tainted");
is($s, '123', "$desc: s value");
is($res, 3, "$desc: res value");
is($one, 'c', "$desc: \$1 value");
$desc = "substitution /r with replacement tainted";
$s = 'abcd';
$res = $s =~ s/(.+)/xyz$TAINT/r;
$one = $1;
isnt_tainted($s, "$desc: s not tainted");
is_tainted($res, "$desc: res tainted");
isnt_tainted($one, "$desc: \$1 not tainted");
is($s, 'abcd', "$desc: s value");
is($res, 'xyz', "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
{
# now do them all again with "use re 'taint"
use re 'taint';
$desc = "use re 'taint': match with string tainted";
$s = 'abcd' . $TAINT;
$res = $s =~ /(.+)/;
$one = $1;
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res not tainted");
is_tainted($one, "$desc: \$1 tainted");
is($res, 1, "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "use re 'taint': match /g with string tainted";
$s = 'abcd' . $TAINT;
$res = $s =~ /(.)/g;
$one = $1;
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res not tainted");
is_tainted($one, "$desc: \$1 tainted");
is($res, 1, "$desc: res value");
is($one, 'a', "$desc: \$1 value");
$desc = "use re 'taint': match with string tainted, list cxt";
$s = 'abcd' . $TAINT;
($res) = $s =~ /(.+)/;
$one = $1;
is_tainted($s, "$desc: s tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($one, "$desc: \$1 tainted");
is($res, 'abcd', "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "use re 'taint': match /g with string tainted, list cxt";
$s = 'abcd' . $TAINT;
($res, $res2) = $s =~ /(.)/g;
$one = $1;
is_tainted($s, "$desc: s tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($res2, "$desc: res2 tainted");
is_tainted($one, "$desc: \$1 not tainted");
is($res, 'a', "$desc: res value");
is($res2,'b', "$desc: res2 value");
is($one, 'd', "$desc: \$1 value");
$desc = "use re 'taint': match with pattern tainted";
$s = 'abcd';
$res = $s =~ /$TAINT(.+)/;
$one = $1;
isnt_tainted($s, "$desc: s not tainted");
isnt_tainted($res, "$desc: res not tainted");
is_tainted($one, "$desc: \$1 tainted");
is($res, 1, "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "use re 'taint': match /g with pattern tainted";
$s = 'abcd';
$res = $s =~ /$TAINT(.)/g;
$one = $1;
isnt_tainted($s, "$desc: s not tainted");
isnt_tainted($res, "$desc: res not tainted");
is_tainted($one, "$desc: \$1 tainted");
is($res, 1, "$desc: res value");
is($one, 'a', "$desc: \$1 value");
SKIP: {
skip 'No locale testing without d_setlocale', 10 if(!$Config{d_setlocale});
$desc = "use re 'taint': match with pattern tainted via locale";
$s = 'abcd';
{
BEGIN {
if($Config{d_setlocale}) {
require locale; import locale;
}
}
$res = $s =~ /(\w+)/; $one = $1;
}
isnt_tainted($s, "$desc: s not tainted");
isnt_tainted($res, "$desc: res not tainted");
is_tainted($one, "$desc: \$1 tainted");
is($res, 1, "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "use re 'taint': match /g with pattern tainted via locale";
$s = 'abcd';
{
BEGIN {
if($Config{d_setlocale}) {
require locale; import locale;
}
}
$res = $s =~ /(\w)/g; $one = $1;
}
isnt_tainted($s, "$desc: s not tainted");
isnt_tainted($res, "$desc: res not tainted");
is_tainted($one, "$desc: \$1 tainted");
is($res, 1, "$desc: res value");
is($one, 'a', "$desc: \$1 value");
}
$desc = "use re 'taint': match with pattern tainted, list cxt";
$s = 'abcd';
($res) = $s =~ /$TAINT(.+)/;
$one = $1;
isnt_tainted($s, "$desc: s not tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($one, "$desc: \$1 tainted");
is($res, 'abcd', "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "use re 'taint': match /g with pattern tainted, list cxt";
$s = 'abcd';
($res, $res2) = $s =~ /$TAINT(.)/g;
$one = $1;
isnt_tainted($s, "$desc: s not tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($one, "$desc: \$1 tainted");
is($res, 'a', "$desc: res value");
is($res2,'b', "$desc: res2 value");
is($one, 'd', "$desc: \$1 value");
SKIP: {
skip 'No locale testing without d_setlocale', 12 if(!$Config{d_setlocale});
$desc = "use re 'taint': match with pattern tainted via locale, list cxt";
$s = 'abcd';
{
BEGIN {
if($Config{d_setlocale}) {
require locale; import locale;
}
}
($res) = $s =~ /(\w+)/; $one = $1;
}
isnt_tainted($s, "$desc: s not tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($one, "$desc: \$1 tainted");
is($res, 'abcd', "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "use re 'taint': match /g with pattern tainted via locale, list cxt";
$s = 'abcd';
{
BEGIN {
if($Config{d_setlocale}) {
require locale; import locale;
}
}
($res, $res2) = $s =~ /(\w)/g; $one = $1;
}
isnt_tainted($s, "$desc: s not tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($res2, "$desc: res2 tainted");
is_tainted($one, "$desc: \$1 tainted");
is($res, 'a', "$desc: res value");
is($res2,'b', "$desc: res2 value");
is($one, 'd', "$desc: \$1 value");
}
$desc = "use re 'taint': substitution with string tainted";
$s = 'abcd' . $TAINT;
$res = $s =~ s/(.+)/xyz/;
$one = $1;
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res not tainted");
is_tainted($one, "$desc: \$1 tainted");
is($s, 'xyz', "$desc: s value");
is($res, 1, "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "use re 'taint': substitution /g with string tainted";
$s = 'abcd' . $TAINT;
$res = $s =~ s/(.)/x/g;
$one = $1;
is_tainted($s, "$desc: s tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($one, "$desc: \$1 tainted");
is($s, 'xxxx', "$desc: s value");
is($res, 4, "$desc: res value");
is($one, 'd', "$desc: \$1 value");
$desc = "use re 'taint': substitution /r with string tainted";
$s = 'abcd' . $TAINT;
$res = $s =~ s/(.+)/xyz/r;
$one = $1;
is_tainted($s, "$desc: s tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($one, "$desc: \$1 tainted");
is($s, 'abcd', "$desc: s value");
is($res, 'xyz', "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "use re 'taint': substitution /e with string tainted";
$s = 'abcd' . $TAINT;
$one = '';
$res = $s =~ s{(.+)}{
$one = $one . "x"; # make sure code not tainted
isnt_tainted($one, "$desc: code not tainted within /e");
$one = $1;
is_tainted($one, "$desc: $1 tainted within /e");
"xyz";
}e;
$one = $1;
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res not tainted");
is_tainted($one, "$desc: \$1 tainted");
is($s, 'xyz', "$desc: s value");
is($res, 1, "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "use re 'taint': substitution with pattern tainted";
$s = 'abcd';
$res = $s =~ s/$TAINT(.+)/xyz/;
$one = $1;
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res not tainted");
is_tainted($one, "$desc: \$1 tainted");
is($s, 'xyz', "$desc: s value");
is($res, 1, "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "use re 'taint': substitution /g with pattern tainted";
$s = 'abcd';
$res = $s =~ s/$TAINT(.)/x/g;
$one = $1;
is_tainted($s, "$desc: s tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($one, "$desc: \$1 tainted");
is($s, 'xxxx', "$desc: s value");
is($res, 4, "$desc: res value");
is($one, 'd', "$desc: \$1 value");
$desc = "use re 'taint': substitution /ge with pattern tainted";
$s = 'abc';
{
my $i = 0;
my $j;
$res = $s =~ s{(.)$TAINT}{
$j = $i; # make sure code not tainted
$one = $1;
isnt_tainted($j, "$desc: code not tainted within /e");
$i++;
if ($i == 1) {
isnt_tainted($s, "$desc: s not tainted loop 1");
}
else {
is_tainted($s, "$desc: s tainted loop $i");
}
is_tainted($one, "$desc: \$1 tainted loop $i");
$i.$TAINT;
}ge;
$one = $1;
}
is_tainted($s, "$desc: s tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($one, "$desc: \$1 tainted");
is($s, '123', "$desc: s value");
is($res, 3, "$desc: res value");
is($one, 'c', "$desc: \$1 value");
$desc = "use re 'taint': substitution /r with pattern tainted";
$s = 'abcd';
$res = $s =~ s/$TAINT(.+)/xyz/r;
$one = $1;
isnt_tainted($s, "$desc: s not tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($one, "$desc: \$1 tainted");
is($s, 'abcd', "$desc: s value");
is($res, 'xyz', "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
SKIP: {
skip 'No locale testing without d_setlocale', 18 if(!$Config{d_setlocale});
$desc = "use re 'taint': substitution with pattern tainted via locale";
$s = 'abcd';
{
BEGIN {
if($Config{d_setlocale}) {
require locale; import locale;
}
}
$res = $s =~ s/(\w+)/xyz/; $one = $1;
}
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res not tainted");
is_tainted($one, "$desc: \$1 tainted");
is($s, 'xyz', "$desc: s value");
is($res, 1, "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "use re 'taint': substitution /g with pattern tainted via locale";
$s = 'abcd';
{
BEGIN {
if($Config{d_setlocale}) {
require locale; import locale;
}
}
$res = $s =~ s/(\w)/x/g; $one = $1;
}
is_tainted($s, "$desc: s tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($one, "$desc: \$1 tainted");
is($s, 'xxxx', "$desc: s value");
is($res, 4, "$desc: res value");
is($one, 'd', "$desc: \$1 value");
$desc = "use re 'taint': substitution /r with pattern tainted via locale";
$s = 'abcd';
{
BEGIN {
if($Config{d_setlocale}) {
require locale; import locale;
}
}
$res = $s =~ s/(\w+)/xyz/r; $one = $1;
}
isnt_tainted($s, "$desc: s not tainted");
is_tainted($res, "$desc: res tainted");
is_tainted($one, "$desc: \$1 tainted");
is($s, 'abcd', "$desc: s value");
is($res, 'xyz', "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
}
$desc = "use re 'taint': substitution with replacement tainted";
$s = 'abcd';
$res = $s =~ s/(.+)/xyz$TAINT/;
$one = $1;
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res not tainted");
isnt_tainted($one, "$desc: \$1 not tainted");
is($s, 'xyz', "$desc: s value");
is($res, 1, "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
$desc = "use re 'taint': substitution /g with replacement tainted";
$s = 'abcd';
$res = $s =~ s/(.)/x$TAINT/g;
$one = $1;
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res not tainted");
isnt_tainted($one, "$desc: \$1 not tainted");
is($s, 'xxxx', "$desc: s value");
is($res, 4, "$desc: res value");
is($one, 'd', "$desc: \$1 value");
$desc = "use re 'taint': substitution /ge with replacement tainted";
$s = 'abc';
{
my $i = 0;
my $j;
$res = $s =~ s{(.)}{
$j = $i; # make sure code not tainted
$one = $1;
isnt_tainted($j, "$desc: code not tainted within /e");
$i++;
if ($i == 1) {
isnt_tainted($s, "$desc: s not tainted loop 1");
}
else {
is_tainted($s, "$desc: s tainted loop $i");
}
isnt_tainted($one, "$desc: \$1 not tainted");
$i.$TAINT;
}ge;
$one = $1;
}
is_tainted($s, "$desc: s tainted");
isnt_tainted($res, "$desc: res tainted");
isnt_tainted($one, "$desc: \$1 not tainted");
is($s, '123', "$desc: s value");
is($res, 3, "$desc: res value");
is($one, 'c', "$desc: \$1 value");
$desc = "use re 'taint': substitution /r with replacement tainted";
$s = 'abcd';
$res = $s =~ s/(.+)/xyz$TAINT/r;
$one = $1;
isnt_tainted($s, "$desc: s not tainted");
is_tainted($res, "$desc: res tainted");
isnt_tainted($one, "$desc: \$1 not tainted");
is($s, 'abcd', "$desc: s value");
is($res, 'xyz', "$desc: res value");
is($one, 'abcd', "$desc: \$1 value");
}
$foo = $1 if 'bar' =~ /(.+)$TAINT/;
is_tainted($foo);
is($foo, 'bar');
my $pi = 4 * atan2(1,1) + $TAINT0;
is_tainted($pi);
($pi) = $pi =~ /(\d+\.\d+)/;
isnt_tainted($pi);
is(sprintf("%.5f", $pi), '3.14159');
}
# How about command-line arguments? The problem is that we don't
# always get some, so we'll run another process with some.
SKIP: {
my $arg = tempfile();
open $fh, '>', $arg or die "Can't create $arg: $!";
print $fh q{
eval { join('', @ARGV), kill 0 };
exit 0 if $@ =~ /^Insecure dependency/;
print "# Oops: \$@ was [$@]\n";
exit 1;
};
close $fh or die "Can't close $arg: $!";
print `$Invoke_Perl "-T" $arg and some suspect arguments`;
is($?, 0, "Exited with status $?");
unlink $arg;
}
# Reading from a file should be tainted
{
ok(open my $fh, '<', $TEST) or diag("Couldn't open '$TEST': $!");
my $block;
sysread($fh, $block, 100);
my $line = <$fh>;
close $fh;
is_tainted($block);
is_tainted($line);
}
# Output of commands should be tainted
{
my $foo = `$echo abc`;
is_tainted($foo);
}
# Certain system variables should be tainted
{
is_tainted($^X);
is_tainted($0);
}
# Results of matching should all be untainted
{
my $foo = "abcdefghi" . $TAINT;
is_tainted($foo);
$foo =~ /def/;
isnt_tainted($`);
isnt_tainted($&);
isnt_tainted($');
$foo =~ /(...)(...)(...)/;
isnt_tainted($1);
isnt_tainted($2);
isnt_tainted($3);
isnt_tainted($+);
my @bar = $foo =~ /(...)(...)(...)/;
isnt_tainted($_) foreach @bar;
is_tainted($foo); # $foo should still be tainted!
is($foo, "abcdefghi");
}
# Operations which affect files can't use tainted data.
{
violates_taint(sub { chmod 0, $TAINT }, 'chmod');
SKIP: {
skip "truncate() is not available", 2 unless $Config{d_truncate};
violates_taint(sub { truncate 'NoSuChFiLe', $TAINT0 }, 'truncate');
}
violates_taint(sub { rename '', $TAINT }, 'rename');
violates_taint(sub { unlink $TAINT }, 'unlink');
violates_taint(sub { utime $TAINT }, 'utime');
SKIP: {
skip "chown() is not available", 2 unless $Config{d_chown};
violates_taint(sub { chown -1, -1, $TAINT }, 'chown');
}
SKIP: {
skip "link() is not available", 2 unless $Config{d_link};
violates_taint(sub { link $TAINT, '' }, 'link');
}
SKIP: {
skip "symlink() is not available", 2 unless $Config{d_symlink};
violates_taint(sub { symlink $TAINT, '' }, 'symlink');
}
}
# Operations which affect directories can't use tainted data.
{
violates_taint(sub { mkdir "foo".$TAINT, 0755 . $TAINT0 }, 'mkdir');
violates_taint(sub { rmdir $TAINT }, 'rmdir');
violates_taint(sub { chdir "foo".$TAINT }, 'chdir');
SKIP: {
skip "chroot() is not available", 2 unless $Config{d_chroot};
violates_taint(sub { chroot $TAINT }, 'chroot');
}
}
# Some operations using files can't use tainted data.
{
my $foo = "imaginary library" . $TAINT;
violates_taint(sub { require $foo }, 'require');
my $filename = tempfile(); # NB: $filename isn't tainted!
$foo = $filename . $TAINT;
unlink $filename; # in any case
is(eval { open FOO, $foo }, undef, 'open for read');
is($@, ''); # NB: This should be allowed
is(eval { open my $fh, , '<', $foo }, undef, 'open for read');
is($@, ''); # NB: This should be allowed
# Try first new style but allow also old style.
# We do not want the whole taint.t to fail
# just because Errno possibly failing.
ok(eval('$!{ENOENT}') ||
$! == 2 || # File not found
($Is_Dos && $! == 22));
violates_taint(sub { open FOO, "> $foo" }, 'open', 'open for write');
violates_taint(sub { open my $fh, '>', $foo }, 'open', 'open for write');
}
# Commands to the system can't use tainted data
{
my $foo = $TAINT;
SKIP: {
skip "open('|') is not available", 8 if $^O eq 'amigaos';
violates_taint(sub { open FOO, "| x$foo" }, 'piped open', 'popen to');
violates_taint(sub { open FOO, "x$foo |" }, 'piped open', 'popen from');
violates_taint(sub { open my $fh, '|-', "x$foo" }, 'piped open', 'popen to');
violates_taint(sub { open my $fh, '-|', "x$foo" }, 'piped open', 'popen from');
}
violates_taint(sub { exec $TAINT }, 'exec');
violates_taint(sub { system $TAINT }, 'system');
$foo = "*";
taint_these $foo;
violates_taint(sub { `$echo 1$foo` }, '``', 'backticks');
SKIP: {
# wildcard expansion doesn't invoke shell on VMS, so is safe
skip "This is not VMS", 2 unless $Is_VMS;
isnt(join('', eval { glob $foo } ), '', 'globbing');
is($@, '');
}
}
# Operations which affect processes can't use tainted data.
{
violates_taint(sub { kill 0, $TAINT }, 'kill');
SKIP: {
skip "setpgrp() is not available", 2 unless $Config{d_setpgrp};
violates_taint(sub { setpgrp 0, $TAINT0 }, 'setpgrp');
}
SKIP: {
skip "setpriority() is not available", 2 unless $Config{d_setprior};
violates_taint(sub { setpriority 0, $TAINT0, $TAINT0 }, 'setpriority');
}
}
# Some miscellaneous operations can't use tainted data.
{
SKIP: {
skip "syscall() is not available", 2 unless $Config{d_syscall};
violates_taint(sub { syscall $TAINT }, 'syscall');
}
{
my $foo = "x" x 979;
taint_these $foo;
local *FOO;
my $temp = tempfile();
ok(open FOO, "> $temp") or diag("Couldn't open $temp for write: $!");
violates_taint(sub { ioctl FOO, $TAINT0, $foo }, 'ioctl');
my $temp2 = tempfile();
ok(open my $fh, '>', $temp2) or diag("Couldn't open $temp2 for write: $!");
violates_taint(sub { ioctl $fh, $TAINT0, $foo }, 'ioctl');
SKIP: {
skip "fcntl() is not available", 4 unless $Config{d_fcntl};
violates_taint(sub { fcntl FOO, $TAINT0, $foo }, 'fcntl');
violates_taint(sub { fcntl $fh, $TAINT0, $foo }, 'fcntl');
}
close FOO;
}
}
# Some tests involving references
{
my $foo = 'abc' . $TAINT;
my $fooref = \$foo;
isnt_tainted($fooref);
is_tainted($$fooref);
is_tainted($foo);
}
# Some tests involving assignment
{
my $foo = $TAINT0;
my $bar = $foo;
is_tainted($foo);
is_tainted($bar);
is_tainted($foo = $bar);
is_tainted($bar = $bar);
is_tainted($bar += $bar);
is_tainted($bar -= $bar);
is_tainted($bar *= $bar);
is_tainted($bar++);
is_tainted($bar /= $bar);
is_tainted($bar += 0);
is_tainted($bar -= 2);
is_tainted($bar *= -1);
is_tainted($bar /= 1);
is_tainted($bar--);
is($bar, 0);
}
# Test assignment and return of lists
{
my @foo = ("A", "tainted" . $TAINT, "B");
isnt_tainted($foo[0]);
is_tainted( $foo[1]);
isnt_tainted($foo[2]);
my @bar = @foo;
isnt_tainted($bar[0]);
is_tainted( $bar[1]);
isnt_tainted($bar[2]);
my @baz = eval { "A", "tainted" . $TAINT, "B" };
isnt_tainted($baz[0]);
is_tainted( $baz[1]);
isnt_tainted($baz[2]);
my @plugh = eval q[ "A", "tainted" . $TAINT, "B" ];
isnt_tainted($plugh[0]);
is_tainted( $plugh[1]);
isnt_tainted($plugh[2]);
my $nautilus = sub { "A", "tainted" . $TAINT, "B" };
isnt_tainted(((&$nautilus)[0]));
is_tainted( ((&$nautilus)[1]));
isnt_tainted(((&$nautilus)[2]));
my @xyzzy = &$nautilus;
isnt_tainted($xyzzy[0]);
is_tainted( $xyzzy[1]);
isnt_tainted($xyzzy[2]);
my $red_october = sub { return "A", "tainted" . $TAINT, "B" };
isnt_tainted(((&$red_october)[0]));
is_tainted( ((&$red_october)[1]));
isnt_tainted(((&$red_october)[2]));
my @corge = &$red_october;
isnt_tainted($corge[0]);
is_tainted( $corge[1]);
isnt_tainted($corge[2]);
}
# Test for system/library calls returning string data of dubious origin.
{
# No reliable %Config check for getpw*
SKIP: {
skip "getpwent() is not available", 9 unless
eval { setpwent(); getpwent() };
setpwent();
my @getpwent = getpwent();
die "getpwent: $!\n" unless (@getpwent);
isnt_tainted($getpwent[0]);
is_tainted($getpwent[1]);
isnt_tainted($getpwent[2]);
isnt_tainted($getpwent[3]);
isnt_tainted($getpwent[4]);
isnt_tainted($getpwent[5]);
is_tainted($getpwent[6], 'ge?cos');
isnt_tainted($getpwent[7]);
is_tainted($getpwent[8], 'shell');
endpwent();
}
SKIP: {
# pretty hard to imagine not
skip "readdir() is not available", 1 unless $Config{d_readdir};
opendir my $dh, "op" or die "opendir: $!\n";
my $readdir = readdir $dh;
is_tainted($readdir);
closedir $dh;
}
SKIP: {
skip "readlink() or symlink() is not available" unless
$Config{d_readlink} && $Config{d_symlink};
my $symlink = "sl$$";
unlink($symlink);
my $sl = "/something/naughty";
# it has to be a real path on Mac OS
symlink($sl, $symlink) or die "symlink: $!\n";
my $readlink = readlink($symlink);
is_tainted($readlink);
unlink($symlink);
}
}
# test bitwise ops (regression bug)
{
my $why = "y";
my $j = "x" | $why;
isnt_tainted($j);
$why = $TAINT."y";
$j = "x" | $why;
is_tainted( $j);
}
# test target of substitution (regression bug)
{
my $why = $TAINT."y";
$why =~ s/y/z/;
is_tainted( $why);
my $z = "[z]";
$why =~ s/$z/zee/;
is_tainted( $why);
$why =~ s/e/'-'.$$/ge;
is_tainted( $why);
}
SKIP: {
skip "no IPC::SysV", 2 unless $ipcsysv;
# test shmread
SKIP: {
skip "shm*() not available", 1 unless $Config{d_shm};
no strict 'subs';
my $sent = "foobar";
my $rcvd;
my $size = 2000;
my $id = shmget(IPC_PRIVATE, $size, S_IRWXU);
if (defined $id) {
if (shmwrite($id, $sent, 0, 60)) {
if (shmread($id, $rcvd, 0, 60)) {
substr($rcvd, index($rcvd, "\0")) = '';
} else {
warn "# shmread failed: $!\n";
}
} else {
warn "# shmwrite failed: $!\n";
}
shmctl($id, IPC_RMID, 0) or warn "# shmctl failed: $!\n";
} else {
warn "# shmget failed: $!\n";
}
skip "SysV shared memory operation failed", 1 unless
$rcvd eq $sent;
is_tainted($rcvd);
}
# test msgrcv
SKIP: {
skip "msg*() not available", 1 unless $Config{d_msg};
no strict 'subs';
my $id = msgget(IPC_PRIVATE, IPC_CREAT | S_IRWXU);
my $sent = "message";
my $type_sent = 1234;
my $rcvd;
my $type_rcvd;
if (defined $id) {
if (msgsnd($id, pack("l! a*", $type_sent, $sent), IPC_NOWAIT)) {
if (msgrcv($id, $rcvd, 60, 0, IPC_NOWAIT)) {
($type_rcvd, $rcvd) = unpack("l! a*", $rcvd);
} else {
warn "# msgrcv failed: $!\n";
}
} else {
warn "# msgsnd failed: $!\n";
}
msgctl($id, IPC_RMID, 0) or warn "# msgctl failed: $!\n";
} else {
warn "# msgget failed\n";
}
SKIP: {
skip "SysV message queue operation failed", 1
unless $rcvd eq $sent && $type_sent == $type_rcvd;
is_tainted($rcvd);
}
}
}
{
# bug id 20001004.006
open my $fh, '<', $TEST or warn "$0: cannot read $TEST: $!" ;
local $/;
my $a = <$fh>;
my $b = <$fh>;
is_tainted($a);
is_tainted($b);
is($b, undef);
}
{
# bug id 20001004.007
open my $fh, '<', $TEST or warn "$0: cannot read $TEST: $!" ;
my $a = <$fh>;
my $c = { a => 42,
b => $a };
isnt_tainted($c->{a});
is_tainted($c->{b});
my $d = { a => $a,
b => 42 };
is_tainted($d->{a});
isnt_tainted($d->{b});
my $e = { a => 42,
b => { c => $a, d => 42 } };
isnt_tainted($e->{a});
isnt_tainted($e->{b});
is_tainted($e->{b}->{c});
isnt_tainted($e->{b}->{d});
}
{
# bug id 20010519.003
BEGIN {
use vars qw($has_fcntl);
eval { require Fcntl; import Fcntl; };
unless ($@) {
$has_fcntl = 1;
}
}
SKIP: {
skip "no Fcntl", 18 unless $has_fcntl;
my $foo = tempfile();
my $evil = $foo . $TAINT;
is(eval { sysopen(my $ro, $evil, &O_RDONLY) }, undef);
is($@, '');
violates_taint(sub { sysopen(my $wo, $evil, &O_WRONLY) }, 'sysopen');
violates_taint(sub { sysopen(my $rw, $evil, &O_RDWR) }, 'sysopen');
violates_taint(sub { sysopen(my $ap, $evil, &O_APPEND) }, 'sysopen');
violates_taint(sub { sysopen(my $cr, $evil, &O_CREAT) }, 'sysopen');
violates_taint(sub { sysopen(my $tr, $evil, &O_TRUNC) }, 'sysopen');
is(eval { sysopen(my $ro, $foo, &O_RDONLY | $TAINT0) }, undef);
is($@, '');
violates_taint(sub { sysopen(my $wo, $foo, &O_WRONLY | $TAINT0) }, 'sysopen');
violates_taint(sub { sysopen(my $rw, $foo, &O_RDWR | $TAINT0) }, 'sysopen');
violates_taint(sub { sysopen(my $ap, $foo, &O_APPEND | $TAINT0) }, 'sysopen');
violates_taint(sub { sysopen(my $cr, $foo, &O_CREAT | $TAINT0) }, 'sysopen');
violates_taint(sub { sysopen(my $tr, $foo, &O_TRUNC | $TAINT0) }, 'sysopen');
is(eval { sysopen(my $ro, $foo, &O_RDONLY, $TAINT0) }, undef);
is($@, '');
violates_taint(sub { sysopen(my $wo, $foo, &O_WRONLY, $TAINT0) }, 'sysopen');
violates_taint(sub { sysopen(my $rw, $foo, &O_RDWR, $TAINT0) }, 'sysopen');
violates_taint(sub { sysopen(my $ap, $foo, &O_APPEND, $TAINT0) }, 'sysopen');
violates_taint(sub { sysopen(my $cr, $foo, &O_CREAT, $TAINT0) }, 'sysopen');
violates_taint(sub { sysopen(my $tr, $foo, &O_TRUNC, $TAINT0) }, 'sysopen');
}
}
{
# bug 20010526.004
use warnings;
my $saw_warning = 0;
local $SIG{__WARN__} = sub { ++$saw_warning };
sub fmi {
my $divnum = shift()/1;
sprintf("%1.1f\n", $divnum);
}
fmi(21 . $TAINT);
fmi(37);
fmi(248);
is($saw_warning, 0);
}
{
# Bug ID 20010730.010
my $i = 0;
sub Tie::TIESCALAR {
my $class = shift;
my $arg = shift;
bless \$arg => $class;
}
sub Tie::FETCH {
$i ++;
${$_ [0]}
}
package main;
my $bar = "The Big Bright Green Pleasure Machine";
taint_these $bar;
tie my ($foo), Tie => $bar;
my $baz = $foo;
ok $i == 1;
}
{
# Check that all environment variables are tainted.
my @untainted;
while (my ($k, $v) = each %ENV) {
if (!tainted($v) &&
# These we have explicitly untainted or set earlier.
$k !~ /^(BASH_ENV|CDPATH|ENV|IFS|PATH|PERL_CORE|TEMP|TERM|TMP)$/) {
push @untainted, "# '$k' = '$v'\n";
}
}
is("@untainted", "");
}
is(${^TAINT}, 1, '$^TAINT is on');
eval { ${^TAINT} = 0 };
is(${^TAINT}, 1, '$^TAINT is not assignable');
like($@, qr/^Modification of a read-only value attempted/,
'Assigning to ${^TAINT} fails');
{
# bug 20011111.105
my $re1 = qr/x$TAINT/;
is_tainted($re1);
my $re2 = qr/^$re1\z/;
is_tainted($re2);
my $re3 = "$re2";
is_tainted($re3);
}
SKIP: {
skip "system {} has different semantics on Win32", 1 if $Is_MSWin32;
# bug 20010221.005
local $ENV{PATH} .= $TAINT;
eval { system { "echo" } "/arg0", "arg1" };
like($@, qr/^Insecure \$ENV/);
}
TODO: {
todo_skip 'tainted %ENV warning occludes tainted arguments warning', 22
if $Is_VMS;
# bug 20020208.005 plus some single arg exec/system extras
violates_taint(sub { exec $TAINT, $TAINT }, 'exec');
violates_taint(sub { exec $TAINT $TAINT }, 'exec');
violates_taint(sub { exec $TAINT $TAINT, $TAINT }, 'exec');
violates_taint(sub { exec $TAINT 'notaint' }, 'exec');
violates_taint(sub { exec {'notaint'} $TAINT }, 'exec');
violates_taint(sub { system $TAINT, $TAINT }, 'system');
violates_taint(sub { system $TAINT $TAINT }, 'system');
violates_taint(sub { system $TAINT $TAINT, $TAINT }, 'system');
violates_taint(sub { system $TAINT 'notaint' }, 'system');
violates_taint(sub { system {'notaint'} $TAINT }, 'system');
eval {
no warnings;
system("lskdfj does not exist","with","args");
};
is($@, "");
eval {
no warnings;
exec("lskdfj does not exist","with","args");
};
is($@, "");
# If you add tests here update also the above skip block for VMS.
}
{
# [ID 20020704.001] taint propagation failure
use re 'taint';
$TAINT =~ /(.*)/;
is_tainted(my $foo = $1);
}
{
# [perl #24291] this used to dump core
our %nonmagicalenv = ( PATH => "util" );
local *ENV = \%nonmagicalenv;
eval { system("lskdfj"); };
like($@, qr/^%ENV is aliased to another variable while running with -T switch/);
local *ENV = *nonmagicalenv;
eval { system("lskdfj"); };
like($@, qr/^%ENV is aliased to %nonmagicalenv while running with -T switch/);
}
{
# [perl #24248]
$TAINT =~ /(.*)/;
isnt_tainted($1);
my $notaint = $1;
isnt_tainted($notaint);
my $l;
$notaint =~ /($notaint)/;
$l = $1;
isnt_tainted($1);
isnt_tainted($l);
$notaint =~ /($TAINT)/;
$l = $1;
is_tainted($1);
is_tainted($l);
$TAINT =~ /($notaint)/;
$l = $1;
isnt_tainted($1);
isnt_tainted($l);
$TAINT =~ /($TAINT)/;
$l = $1;
is_tainted($1);
is_tainted($l);
my $r;
($r = $TAINT) =~ /($notaint)/;
isnt_tainted($1);
($r = $TAINT) =~ /($TAINT)/;
is_tainted($1);
{
use re 'eval'; # this shouldn't make any difference
($r = $TAINT) =~ /($notaint)/;
isnt_tainted($1);
($r = $TAINT) =~ /($TAINT)/;
is_tainted($1);
}
# [perl #24674]
# accessing $^O shoudn't taint it as a side-effect;
# assigning tainted data to it is now an error
isnt_tainted($^O);
if (!$^X) { } elsif ($^O eq 'bar') { }
isnt_tainted($^O);
local $^O; # We're going to clobber something test infrastructure depends on.
eval '$^O = $^X';
like($@, qr/Insecure dependency in/);
}
EFFECTIVELY_CONSTANTS: {
my $tainted_number = 12 + $TAINT0;
is_tainted( $tainted_number );
# Even though it's always 0, it's still tainted
my $tainted_product = $tainted_number * 0;
is_tainted( $tainted_product );
is($tainted_product, 0);
}
TERNARY_CONDITIONALS: {
my $tainted_true = $TAINT . "blah blah blah";
my $tainted_false = $TAINT0;
is_tainted( $tainted_true );
is_tainted( $tainted_false );
my $result = $tainted_true ? "True" : "False";
is($result, "True");
isnt_tainted( $result );
$result = $tainted_false ? "True" : "False";
is($result, "False");
isnt_tainted( $result );
my $untainted_whatever = "The Fabulous Johnny Cash";
my $tainted_whatever = "Soft Cell" . $TAINT;
$result = $tainted_true ? $tainted_whatever : $untainted_whatever;
is($result, "Soft Cell");
is_tainted( $result );
$result = $tainted_false ? $tainted_whatever : $untainted_whatever;
is($result, "The Fabulous Johnny Cash");
isnt_tainted( $result );
}
{
# rt.perl.org 5900 $1 remains tainted if...
# 1) The regular expression contains a scalar variable AND
# 2) The regular expression appears in an elsif clause
my $foo = "abcdefghi" . $TAINT;
my $valid_chars = 'a-z';
if ( $foo eq '' ) {
}
elsif ( $foo =~ /([$valid_chars]+)/o ) {
isnt_tainted($1);
isnt($1, undef);
}
if ( $foo eq '' ) {
}
elsif ( my @bar = $foo =~ /([$valid_chars]+)/o ) {
isnt_tainted($bar[0]);
is(scalar @bar, 1);
}
}
# at scope exit, a restored localised value should have its old
# taint status, not the taint status of the current statement
{
our $x99 = $^X;
is_tainted($x99);
$x99 = '';
isnt_tainted($x99);
my $c = do { local $x99; $^X };
isnt_tainted($x99);
}
{
our $x99 = $^X;
is_tainted($x99);
my $c = do { local $x99; '' };
is_tainted($x99);
}
# an mg_get of a tainted value during localization shouldn't taint the
# statement
{
eval { local $0, eval '1' };
is($@, '');
}
# [perl #8262] //g loops infinitely on tainted data
{
my @a;
$a[0] = $^X . '-';
$a[0]=~ m/(.)/g;
cmp_ok pos($a[0]), '>', 0, "infinite m//g on arrays (aelemfast)";
my $i = 1;
$a[$i] = $^X . '-';
$a[$i]=~ m/(.)/g;
cmp_ok pos($a[$i]), '>', 0, "infinite m//g on arrays (aelem)";
my %h;
$h{a} = $^X . '-';
$h{a}=~ m/(.)/g;
cmp_ok pos($h{a}), '>', 0, "infinite m//g on hashes (helem)";
}
SKIP:
{
my $got_dualvar;
eval 'use Scalar::Util "dualvar"; $got_dualvar++';
skip "No Scalar::Util::dualvar" unless $got_dualvar;
my $a = Scalar::Util::dualvar(3, $^X);
my $b = $a + 5;
is ($b, 8, "Arithmetic on tainted dualvars works");
}
# opening '|-' should not trigger $ENV{PATH} check
{
SKIP: {
skip "fork() is not available", 3 unless $Config{'d_fork'};
skip "opening |- is not stable on threaded Open/MirBSD with taint", 3
if $Config{useithreads} and $Is_OpenBSD || $Is_MirBSD;
$ENV{'PATH'} = $TAINT;
local $SIG{'PIPE'} = 'IGNORE';
eval {
my $pid = open my $pipe, '|-';
if (!defined $pid) {
die "open failed: $!";
}
if (!$pid) {
kill 'KILL', $$; # child suicide
}
close $pipe;
};
unlike($@, qr/Insecure \$ENV/, 'fork triggers %ENV check');
is($@, '', 'pipe/fork/open/close failed');
eval {
open my $pipe, "|$Invoke_Perl -e 1";
close $pipe;
};
like($@, qr/Insecure \$ENV/, 'popen neglects %ENV check');
}
}
{
package AUTOLOAD_TAINT;
sub AUTOLOAD {
our $AUTOLOAD;
return if $AUTOLOAD =~ /DESTROY/;
if ($AUTOLOAD =~ /untainted/) {
main::isnt_tainted($AUTOLOAD, '$AUTOLOAD can be untainted');
my $copy = $AUTOLOAD;
main::isnt_tainted($copy, '$AUTOLOAD can be untainted');
} else {
main::is_tainted($AUTOLOAD, '$AUTOLOAD can be tainted');
my $copy = $AUTOLOAD;
main::is_tainted($copy, '$AUTOLOAD can be tainted');
}
}
package main;
my $o = bless [], 'AUTOLOAD_TAINT';
$o->untainted;
$o->$TAINT;
$o->untainted;
}
{
# tests for tainted format in s?printf
my $fmt = $TAINT . "# %s\n";
violates_taint(sub { printf($fmt, "foo") }, 'printf',
q/printf doesn't like tainted formats/);
violates_taint(sub { printf($TAINT . "# %s\n", "foo") }, 'printf',
q/printf doesn't like tainted format expressions/);
eval { printf("# %s\n", $TAINT . "foo") };
is($@, '', q/printf accepts other tainted args/);
violates_taint(sub { sprintf($fmt, "foo") }, 'sprintf',
q/sprintf doesn't like tainted formats/);
violates_taint(sub { sprintf($TAINT . "# %s\n", "foo") }, 'sprintf',
q/sprintf doesn't like tainted format expressions/);
eval { sprintf("# %s\n", $TAINT . "foo") };
is($@, '', q/sprintf accepts other tainted args/);
}
{
# 40708
my $n = 7e9;
8e9 - $n;
my $val = $n;
is ($val, '7000000000', 'Assignment to untainted variable');
$val = $TAINT;
$val = $n;
is ($val, '7000000000', 'Assignment to tainted variable');
}
{
my $val = 0;
my $tainted = '1' . $TAINT;
eval '$val = eval $tainted;';
is ($val, 0, "eval doesn't like tainted strings");
like ($@, qr/^Insecure dependency in eval/);
# Rather nice code to get a tainted undef by from Rick Delaney
open my $fh, "test.pl" or die $!;
seek $fh, 0, 2 or die $!;
$tainted = <$fh>;
eval 'eval $tainted';
like ($@, qr/^Insecure dependency in eval/);
}
foreach my $ord (78, 163, 256) {
# 47195
my $line = 'A1' . $TAINT . chr $ord;
chop $line;
is($line, 'A1');
$line =~ /(A\S*)/;
isnt_tainted($1, "\\S match with chr $ord");
}
{
# 59998
sub cr { my $x = crypt($_[0], $_[1]); $x }
sub co { my $x = ~$_[0]; $x }
my ($a, $b);
$a = cr('hello', 'foo' . $TAINT);
$b = cr('hello', 'foo');
is_tainted($a, "tainted crypt");
isnt_tainted($b, "untainted crypt");
$a = co('foo' . $TAINT);
$b = co('foo');
is_tainted($a, "tainted complement");
isnt_tainted($b, "untainted complement");
}
{
my @data = qw(bonk zam zlonk qunckkk);
# Clearly some sort of usenet bang-path
my $string = $TAINT . join "!", @data;
is_tainted($string, "tainted data");
my @got = split /!|,/, $string;
# each @got would be useful here, but I want the test for earlier perls
for my $i (0 .. $#data) {
is_tainted($got[$i], "tainted result $i");
is($got[$i], $data[$i], "correct content $i");
}
is_tainted($string, "still tainted data");
my @got = split /[!,]/, $string;
# each @got would be useful here, but I want the test for earlier perls
for my $i (0 .. $#data) {
is_tainted($got[$i], "tainted result $i");
is($got[$i], $data[$i], "correct content $i");
}
is_tainted($string, "still tainted data");
my @got = split /!/, $string;
# each @got would be useful here, but I want the test for earlier perls
for my $i (0 .. $#data) {
is_tainted($got[$i], "tainted result $i");
is($got[$i], $data[$i], "correct content $i");
}
}
# Bug RT #52552 - broken by change at git commit id f337b08
{
my $x = $TAINT. q{print "Hello world\n"};
my $y = pack "a*", $x;
is_tainted($y, "pack a* preserves tainting");
my $z = pack "A*", q{print "Hello world\n"}.$TAINT;
is_tainted($z, "pack A* preserves tainting");
my $zz = pack "a*a*", q{print "Hello world\n"}, $TAINT;
is_tainted($zz, "pack a*a* preserves tainting");
}
# Bug RT #61976 tainted $! would show numeric rather than string value
{
my $tainted_path = substr($^X,0,0) . "/no/such/file";
my $err;
# $! is used in a tainted expression, so gets tainted
open my $fh, $tainted_path or $err= "$!";
unlike($err, qr/^\d+$/, 'tainted $!');
}
{
# #6758: tainted values become untainted in tied hashes
# (also applies to other value magic such as pos)
package P6758;
sub TIEHASH { bless {} }
sub TIEARRAY { bless {} }
my $i = 0;
sub STORE {
main::is_tainted($_[1], "tied arg1 tainted");
main::is_tainted($_[2], "tied arg2 tainted");
$i++;
}
package main;
my ($k,$v) = qw(1111 val);
taint_these($k,$v);
tie my @array, 'P6758';
tie my %hash , 'P6758';
$array[$k] = $v;
$hash{$k} = $v;
ok $i == 2, "tied STORE called correct number of times";
}
# Bug RT #45167 the return value of sprintf sometimes wasn't tainted
# when the args were tainted. This only occured on the first use of
# sprintf; after that, its TARG has taint magic attached, so setmagic
# at the end works. That's why there are multiple sprintf's below, rather
# than just one wrapped in an inner loop. Also, any plaintext between
# fprmat entires would correctly cause tainting to get set. so test with
# "%s%s" rather than eg "%s %s".
{
for my $var1 ($TAINT, "123") {
for my $var2 ($TAINT0, "456") {
is( tainted(sprintf '%s', $var1, $var2), tainted($var1),
"sprintf '%s', '$var1', '$var2'" );
is( tainted(sprintf ' %s', $var1, $var2), tainted($var1),
"sprintf ' %s', '$var1', '$var2'" );
is( tainted(sprintf '%s%s', $var1, $var2),
tainted($var1) || tainted($var2),
"sprintf '%s%s', '$var1', '$var2'" );
}
}
}
# Bug RT #67962: old tainted $1 gets treated as tainted
# in next untainted # match
{
use re 'taint';
"abc".$TAINT =~ /(.*)/; # make $1 tainted
is_tainted($1, '$1 should be tainted');
my $untainted = "abcdef";
isnt_tainted($untainted, '$untainted should be untainted');
$untainted =~ s/(abc)/$1/;
isnt_tainted($untainted, '$untainted should still be untainted');
$untainted =~ s/(abc)/x$1/;
isnt_tainted($untainted, '$untainted should yet still be untainted');
}
{
# On Windows we can't spawn a fresh Perl interpreter unless at
# least the Windows system directory (usually C:\Windows\System32)
# is still on the PATH. There is however no way to determine the
# actual path on the current system without loading the Win32
# module, so we just restore the original $ENV{PATH} here.
local $ENV{PATH} = $ENV{PATH};
$ENV{PATH} = $old_env_path if $Is_MSWin32;
fresh_perl_is(<<'end', "ok", { switches => [ '-T' ] },
$TAINT = substr($^X, 0, 0);
formline('@'.('<'x("2000".$TAINT)).' | @*', 'hallo', 'welt');
print "ok";
end
"formline survives a tainted dynamic picture");
}
{
isnt_tainted($^A, "format accumulator not tainted yet");
formline('@ | @*', 'hallo' . $TAINT, 'welt');
is_tainted($^A, "tainted formline argument makes a tainted accumulator");
$^A = "";
isnt_tainted($^A, "accumulator can be explicitly untainted");
formline('@' .('<'*5) . ' | @*', 'hallo', 'welt');
isnt_tainted($^A, "accumulator still untainted");
$^A = "" . $TAINT;
is_tainted($^A, "accumulator can be explicitly tainted");
formline('@' .('<'*5) . ' | @*', 'hallo', 'welt');
is_tainted($^A, "accumulator still tainted");
$^A = "";
isnt_tainted($^A, "accumulator untainted again");
formline('@' .('<'*5) . ' | @*', 'hallo', 'welt');
isnt_tainted($^A, "accumulator still untainted");
formline('@' .('<'*(5+$TAINT0)) . ' | @*', 'hallo', 'welt');
is_tainted($^A, "the accumulator should be tainted already");
is_tainted($^A, "tainted formline picture makes a tainted accumulator");
}
{ # Bug #80610
"Constant(1)" =~ / ^ ([a-z_]\w*) (?: [(] (.*) [)] )? $ /xi;
my $a = $1;
my $b = $2;
isnt_tainted($a, "regex optimization of single char /[]/i doesn't taint");
isnt_tainted($b, "regex optimization of single char /[]/i doesn't taint");
}
{
# RT 81230: tainted value during FETCH created extra ref to tied obj
package P81230;
use warnings;
my %h;
sub TIEHASH {
my $x = $^X; # tainted
bless \$x;
}
sub FETCH { my $x = $_[0]; $$x . "" }
tie %h, 'P81230';
my $w = "";
local $SIG{__WARN__} = sub { $w .= "@_" };
untie %h if $h{"k"};
::is($w, "", "RT 81230");
}
{
# Compiling a subroutine inside a tainted expression does not make the
# constant folded values tainted.
my $x = sub { "x" . "y" };
my $y = $ENV{PATH} . $x->(); # Compile $x inside a tainted expression
my $z = $x->();
isnt_tainted($z, "Constants folded value not tainted");
}
{
# now that regexes are first class SVs, make sure that they themselves
# as well as references to them are tainted
my $rr = qr/(.)$TAINT/;
my $r = $$rr; # bare REGEX
my $s ="abc";
ok($s =~ s/$r/x/, "match bare regex");
is_tainted($s, "match bare regex taint");
is($s, 'xbc', "match bare regex taint value");
}
{
# [perl #82616] security Issues with user-defined \p{} properties
# A using a tainted user-defined property should croak
sub IsA { sprintf "%02x", ord("A") }
my $prop = "IsA";
ok("A" =~ /\p{$prop}/, "user-defined property: non-tainted case");
$prop = "IsA$TAINT";
eval { "A" =~ /\p{$prop}/};
like($@, qr/Insecure user-defined property \\p\{main::IsA}/,
"user-defined property: tainted case");
}
{
# [perl #87336] lc/uc(first) failing to taint the returned string
my $source = "foo$TAINT";
my $dest = lc $source;
is_tainted $dest, "lc(tainted) taints its return value";
$dest = lcfirst $source;
is_tainted $dest, "lcfirst(tainted) taints its return value";
$dest = uc $source;
is_tainted $dest, "uc(tainted) taints its return value";
$dest = ucfirst $source;
is_tainted $dest, "ucfirst(tainted) taints its return value";
}
{
# Taintedness of values returned from given()
use feature 'switch';
no warnings 'experimental::smartmatch';
my @descriptions = ('when', 'given end', 'default');
for (qw<x y z>) {
my $letter = "$_$TAINT";
my $desc = "tainted value returned from " . shift(@descriptions);
my $res = do {
given ($_) {
when ('x') { $letter }
when ('y') { goto leavegiven }
default { $letter }
leavegiven: $letter
}
};
is $res, $letter, "$desc is correct";
is_tainted $res, "$desc stays tainted";
}
}
# tainted constants and index()
# RT 64804; http://bugs.debian.org/291450
{
ok(tainted $old_env_path, "initial taintedness");
BEGIN { no strict 'refs'; my $v = $old_env_path; *{"::C"} = sub () { $v }; }
ok(tainted C, "constant is tainted properly");
ok(!tainted "", "tainting not broken yet");
index(undef, C);
ok(!tainted "", "tainting still works after index() of the constant");
}
# Tainted values with smartmatch
# [perl #93590] S_do_smartmatch stealing its own string buffers
{
no warnings 'experimental::smartmatch';
ok "M$TAINT" ~~ ['m', 'M'], '$tainted ~~ ["whatever", "match"]';
ok !("M$TAINT" ~~ ['m', undef]), '$tainted ~~ ["whatever", undef]';
}
# Tainted values and ref()
for(1,2) {
my $x = bless \"M$TAINT", ref(bless[], "main");
}
pass("no death when TARG of ref is tainted");
# $$ should not be tainted by being read in a tainted expression.
{
isnt_tainted $$, "PID not tainted initially";
my $x = $ENV{PATH}.$$;
isnt_tainted $$, "PID not tainted when read in tainted expression";
}
SKIP: {
skip 'No locale testing without d_setlocale', 4 if(!$Config{d_setlocale});
use feature 'fc';
BEGIN {
if($Config{d_setlocale}) {
require locale; import locale;
}
}
my ($latin1, $utf8) = ("\xDF") x 2;
utf8::downgrade($latin1);
utf8::upgrade($utf8);
is_tainted fc($latin1), "under locale, lc(latin1) taints the result";
is_tainted fc($utf8), "under locale, lc(utf8) taints the result";
is_tainted "\F$latin1", "under locale, \\Flatin1 taints the result";
is_tainted "\F$utf8", "under locale, \\Futf8 taints the result";
}
{ # 111654
eval {
eval { die "Test\n".substr($ENV{PATH}, 0, 0); };
die;
};
like($@, qr/^Test\n\t\.\.\.propagated at /, "error should be propagated");
}
# tainted run-time (?{}) should die
{
my $code = '(?{})' . $TAINT;
use re 'eval';
eval { "a" =~ /$code/ };
like($@, qr/Eval-group in insecure regular expression/, "tainted (?{})");
}
# This may bomb out with the alarm signal so keep it last
SKIP: {
skip "No alarm()" unless $Config{d_alarm};
# Test from RT #41831]
# [PATCH] Bug & fix: hang when using study + taint mode (perl 5.6.1, 5.8.x)
my $DATA = <<'END' . $TAINT;
line1 is here
line2 is here
line3 is here
line4 is here
END
#study $DATA;
## don't set $SIG{ALRM}, since we'd never get to a user-level handler as
## perl is stuck in a regexp infinite loop!
alarm(10);
if ($DATA =~ /^line2.*line4/m) {
fail("Should not be a match")
} else {
pass("Match on tainted multiline data should fail promptly");
}
alarm(0);
}
__END__
# Keep the previous test last