3 # Taint tests by Tom Phoenix <rootbeer@teleport.com>.
5 # I don't claim to know all about tainting. If anyone sees
6 # tests that I've missed here, please add them. But this is
7 # better than having no tests at all, right?
17 use File::Spec::Functions;
19 BEGIN { require './test.pl'; }
24 use vars qw($ipcsysv); # did we manage to load IPC::SysV?
26 my ($old_env_path, $old_env_dcl_path, $old_env_term);
28 $old_env_path = $ENV{'PATH'};
29 $old_env_dcl_path = $ENV{'DCL$PATH'};
30 $old_env_term = $ENV{'TERM'};
31 if ($^O eq 'VMS' && !defined($Config{d_setenv})) {
32 $ENV{PATH} = $ENV{PATH};
33 $ENV{TERM} = $ENV{TERM} ne ''? $ENV{TERM} : 'dummy';
35 if ($Config{'extensions'} =~ /\bIPC\/SysV\b/
36 && ($Config{d_shm} || $Config{d_msg})) {
37 eval { require IPC::SysV };
40 IPC::SysV->import(qw(IPC_PRIVATE IPC_RMID IPC_CREAT S_IRWXU IPC_NOWAIT));
45 my $Is_MacOS = $^O eq 'MacOS';
46 my $Is_VMS = $^O eq 'VMS';
47 my $Is_MSWin32 = $^O eq 'MSWin32';
48 my $Is_NetWare = $^O eq 'NetWare';
49 my $Is_Dos = $^O eq 'dos';
50 my $Is_Cygwin = $^O eq 'cygwin';
51 my $Is_OpenBSD = $^O eq 'openbsd';
52 my $Invoke_Perl = $Is_VMS ? 'MCR Sys$Disk:[]Perl.exe' :
53 $Is_MSWin32 ? '.\perl' :
55 $Is_NetWare ? 'perl' :
57 my @MoreEnv = qw/IFS CDPATH ENV BASH_ENV/;
61 for $x ('DCL$PATH', @MoreEnv) {
62 ($old{$x}) = $ENV{$x} =~ /^(.*)$/ if exists $ENV{$x};
64 # VMS note: PATH and TERM are automatically created by the C
65 # library in VMS on reference to the their keys in %ENV.
66 # There is currently no way to determine if they did not exist
67 # before this test was run.
70 \$ENV{PATH} = \$old_env_path;
71 warn "# Note: logical name 'PATH' may have been created\n";
72 \$ENV{'TERM'} = \$old_env_term;
73 warn "# Note: logical name 'TERM' may have been created\n";
74 \@ENV{keys %old} = values %old;
75 if (defined \$old_env_dcl_path) {
76 \$ENV{'DCL\$PATH'} = \$old_env_dcl_path;
78 delete \$ENV{'DCL\$PATH'};
85 # The empty tainted value, for tainting strings
86 my $TAINT = substr($^X, 0, 0);
87 # A tainted zero, useful for tainting numbers
94 # This taints each argument passed. All must be lvalues.
95 # Side effect: It also stringifies them. :-(
97 for (@_) { $_ .= $TAINT }
100 # How to identify taint when you see it
101 sub any_tainted (@) {
102 not eval { join("",@_), kill 0; 1 };
107 sub all_tainted (@) {
108 for (@_) { return 0 unless tainted $_ }
116 my $curr_test = curr_test();
119 print "ok $curr_test\n";
121 print "not ok $curr_test\n";
122 printf "# Failed test at line %d\n", (caller)[2];
123 for (split m/^/m, $diag) {
128 or substr($diag, -1) eq "\n";
136 # We need an external program to call.
137 my $ECHO = ($Is_MSWin32 ? ".\\echo$$" : $Is_MacOS ? ":echo$$" : ($Is_NetWare ? "echo$$" : "./echo$$"));
139 open PROG, "> $ECHO" or die "Can't create $ECHO: $!";
140 print PROG 'print "@ARGV\n"', "\n";
142 my $echo = "$Invoke_Perl $ECHO";
144 my $TEST = catfile(curdir(), 'TEST');
146 # First, let's make sure that Perl is checking the dangerous
147 # environment variables. Maybe they aren't set yet, so we'll
148 # taint them ourselves.
150 $ENV{'DCL$PATH'} = '' if $Is_VMS;
152 if ($Is_MSWin32 && $Config{ccname} =~ /bcc32/ && ! -f 'cc3250mt.dll') {
154 foreach my $dir (split /$Config{path_sep}/, $ENV{PATH}) {
155 if (-f "$dir/cc3250mt.dll") {
156 $bcc_dir = $dir and last;
159 if (defined $bcc_dir) {
161 File::Copy::copy("$bcc_dir/cc3250mt.dll", '.') or
162 die "$0: failed to copy cc3250mt.dll: $!\n";
164 END { unlink "cc3250mt.dll" }
168 $ENV{PATH} = ($Is_Cygwin) ? '/usr/bin' : '';
169 delete @ENV{@MoreEnv};
172 test eval { `$echo 1` } eq "1\n";
175 skip "Environment tainting tests skipped", 4
176 if $Is_MSWin32 || $Is_NetWare || $Is_VMS || $Is_Dos || $Is_MacOS;
178 my @vars = ('PATH', @MoreEnv);
179 while (my $v = $vars[0]) {
180 local $ENV{$v} = $TAINT;
181 last if eval { `$echo 1` };
182 last unless $@ =~ /^Insecure \$ENV{$v}/;
185 test !@vars, "@vars";
187 # tainted $TERM is unsafe only if it contains metachars
189 $ENV{TERM} = 'e=mc2';
190 test eval { `$echo 1` } eq "1\n";
191 $ENV{TERM} = 'e=mc2' . $TAINT;
192 test !eval { `$echo 1` };
193 test $@ =~ /^Insecure \$ENV{TERM}/, $@;
197 if ($^O eq 'os2' || $^O eq 'amigaos' || $Is_MSWin32 || $Is_NetWare || $Is_Dos) {
198 print "# all directories are writeable\n";
201 $tmp = (grep { defined and -d and (stat _)[2] & 2 }
202 qw(sys$scratch /tmp /var/tmp /usr/tmp),
203 @ENV{qw(TMP TEMP)})[0]
204 or print "# can't find world-writeable directory to test PATH\n";
208 skip "all directories are writeable", 2 unless $tmp;
210 local $ENV{PATH} = $tmp;
211 test !eval { `$echo 1` };
212 test $@ =~ /^Insecure directory in \$ENV{PATH}/, $@;
216 skip "This is not VMS", 4 unless $Is_VMS;
218 $ENV{'DCL$PATH'} = $TAINT;
219 test eval { `$echo 1` } eq '';
220 test $@ =~ /^Insecure \$ENV{DCL\$PATH}/, $@;
222 skip q[can't find world-writeable directory to test DCL$PATH], 2
225 $ENV{'DCL$PATH'} = $tmp;
226 test eval { `$echo 1` } eq '';
227 test $@ =~ /^Insecure directory in \$ENV{DCL\$PATH}/, $@;
229 $ENV{'DCL$PATH'} = '';
233 # Let's see that we can taint and untaint as needed.
238 # That was a sanity check. If it failed, stop the insanity!
239 die "Taint checks don't seem to be enabled" unless tainted $foo;
242 test not tainted $foo;
248 test not any_tainted @list;
249 taint_these @list[1,3,5,7,9];
250 test any_tainted @list;
251 test all_tainted @list[1,3,5,7,9];
252 test not any_tainted @list[0,2,4,6,8];
254 ($foo) = $foo =~ /(.+)/;
255 test not tainted $foo;
257 $foo = $1 if ('bar' . $TAINT) =~ /(.+)/;
258 test not tainted $foo;
264 ($foo) = ('bar' . $TAINT) =~ /(.+)/;
268 $foo = $1 if ('bar' . $TAINT) =~ /(.+)/;
273 $foo = $1 if 'bar' =~ /(.+)$TAINT/;
277 my $pi = 4 * atan2(1,1) + $TAINT0;
280 ($pi) = $pi =~ /(\d+\.\d+)/;
281 test not tainted $pi;
282 test sprintf("%.5f", $pi) eq '3.14159';
285 # How about command-line arguments? The problem is that we don't
286 # always get some, so we'll run another process with some.
288 my $arg = tempfile();
289 open PROG, "> $arg" or die "Can't create $arg: $!";
291 eval { join('', @ARGV), kill 0 };
292 exit 0 if $@ =~ /^Insecure dependency/;
293 print "# Oops: \$@ was [$@]\n";
297 print `$Invoke_Perl "-T" $arg and some suspect arguments`;
298 test !$?, "Exited with status $?";
302 # Reading from a file should be tainted
304 test open(FILE, $TEST), "Couldn't open '$TEST': $!";
307 sysread(FILE, $block, 100);
314 # Globs should be forbidden, except under VMS,
315 # which doesn't spawn an external program.
317 skip "globs should be forbidden", 2 if 1 or $Is_VMS;
319 my @globs = eval { <*> };
320 test @globs == 0 && $@ =~ /^Insecure dependency/;
322 @globs = eval { glob '*' };
323 test @globs == 0 && $@ =~ /^Insecure dependency/;
326 # Output of commands should be tainted
328 my $foo = `$echo abc`;
332 # Certain system variables should be tainted
334 test all_tainted $^X, $0;
337 # Results of matching should all be untainted
339 my $foo = "abcdefghi" . $TAINT;
343 test not any_tainted $`, $&, $';
345 $foo =~ /(...)(...)(...)/;
346 test not any_tainted $1, $2, $3, $+;
348 my @bar = $foo =~ /(...)(...)(...)/;
349 test not any_tainted @bar;
351 test tainted $foo; # $foo should still be tainted!
352 test $foo eq "abcdefghi";
355 # Operations which affect files can't use tainted data.
357 test !eval { chmod 0, $TAINT }, 'chmod';
358 test $@ =~ /^Insecure dependency/, $@;
360 # There is no feature test in $Config{} for truncate,
361 # so we allow for the possibility that it's missing.
362 test !eval { truncate 'NoSuChFiLe', $TAINT0 }, 'truncate';
363 test $@ =~ /^(?:Insecure dependency|truncate not implemented)/, $@;
365 test !eval { rename '', $TAINT }, 'rename';
366 test $@ =~ /^Insecure dependency/, $@;
368 test !eval { unlink $TAINT }, 'unlink';
369 test $@ =~ /^Insecure dependency/, $@;
371 test !eval { utime $TAINT }, 'utime';
372 test $@ =~ /^Insecure dependency/, $@;
375 skip "chown() is not available", 2 unless $Config{d_chown};
377 test !eval { chown -1, -1, $TAINT }, 'chown';
378 test $@ =~ /^Insecure dependency/, $@;
382 skip "link() is not available", 2 unless $Config{d_link};
384 test !eval { link $TAINT, '' }, 'link';
385 test $@ =~ /^Insecure dependency/, $@;
389 skip "symlink() is not available", 2 unless $Config{d_symlink};
391 test !eval { symlink $TAINT, '' }, 'symlink';
392 test $@ =~ /^Insecure dependency/, $@;
396 # Operations which affect directories can't use tainted data.
398 test !eval { mkdir "foo".$TAINT, 0755.$TAINT0 }, 'mkdir';
399 test $@ =~ /^Insecure dependency/, $@;
401 test !eval { rmdir $TAINT }, 'rmdir';
402 test $@ =~ /^Insecure dependency/, $@;
404 test !eval { chdir "foo".$TAINT }, 'chdir';
405 test $@ =~ /^Insecure dependency/, $@;
408 skip "chroot() is not available", 2 unless $Config{d_chroot};
410 test !eval { chroot $TAINT }, 'chroot';
411 test $@ =~ /^Insecure dependency/, $@;
415 # Some operations using files can't use tainted data.
417 my $foo = "imaginary library" . $TAINT;
418 test !eval { require $foo }, 'require';
419 test $@ =~ /^Insecure dependency/, $@;
421 my $filename = tempfile(); # NB: $filename isn't tainted!
422 $foo = $filename . $TAINT;
423 unlink $filename; # in any case
425 test !eval { open FOO, $foo }, 'open for read';
426 test $@ eq '', $@; # NB: This should be allowed
428 # Try first new style but allow also old style.
429 # We do not want the whole taint.t to fail
430 # just because Errno possibly failing.
431 test eval('$!{ENOENT}') ||
432 $! == 2 || # File not found
433 ($Is_Dos && $! == 22) ||
434 ($^O eq 'mint' && $! == 33);
436 test !eval { open FOO, "> $foo" }, 'open for write';
437 test $@ =~ /^Insecure dependency/, $@;
440 # Commands to the system can't use tainted data
445 skip "open('|') is not available", 4 if $^O eq 'amigaos';
447 test !eval { open FOO, "| x$foo" }, 'popen to';
448 test $@ =~ /^Insecure dependency/, $@;
450 test !eval { open FOO, "x$foo |" }, 'popen from';
451 test $@ =~ /^Insecure dependency/, $@;
454 test !eval { exec $TAINT }, 'exec';
455 test $@ =~ /^Insecure dependency/, $@;
457 test !eval { system $TAINT }, 'system';
458 test $@ =~ /^Insecure dependency/, $@;
463 test !eval { `$echo 1$foo` }, 'backticks';
464 test $@ =~ /^Insecure dependency/, $@;
467 # wildcard expansion doesn't invoke shell on VMS, so is safe
468 skip "This is not VMS", 2 unless $Is_VMS;
470 test join('', eval { glob $foo } ) ne '', 'globbing';
475 # Operations which affect processes can't use tainted data.
477 test !eval { kill 0, $TAINT }, 'kill';
478 test $@ =~ /^Insecure dependency/, $@;
481 skip "setpgrp() is not available", 2 unless $Config{d_setpgrp};
483 test !eval { setpgrp 0, $TAINT0 }, 'setpgrp';
484 test $@ =~ /^Insecure dependency/, $@;
488 skip "setpriority() is not available", 2 unless $Config{d_setprior};
490 test !eval { setpriority 0, $TAINT0, $TAINT0 }, 'setpriority';
491 test $@ =~ /^Insecure dependency/, $@;
495 # Some miscellaneous operations can't use tainted data.
498 skip "syscall() is not available", 2 unless $Config{d_syscall};
500 test !eval { syscall $TAINT }, 'syscall';
501 test $@ =~ /^Insecure dependency/, $@;
508 my $temp = tempfile();
509 test open(FOO, "> $temp"), "Couldn't open $temp for write: $!";
511 test !eval { ioctl FOO, $TAINT0, $foo }, 'ioctl';
512 test $@ =~ /^Insecure dependency/, $@;
515 skip "fcntl() is not available", 2 unless $Config{d_fcntl};
517 test !eval { fcntl FOO, $TAINT0, $foo }, 'fcntl';
518 test $@ =~ /^Insecure dependency/, $@;
525 # Some tests involving references
527 my $foo = 'abc' . $TAINT;
529 test not tainted $fooref;
530 test tainted $$fooref;
534 # Some tests involving assignment
538 test all_tainted $foo, $bar;
539 test tainted($foo = $bar);
540 test tainted($bar = $bar);
541 test tainted($bar += $bar);
542 test tainted($bar -= $bar);
543 test tainted($bar *= $bar);
544 test tainted($bar++);
545 test tainted($bar /= $bar);
546 test tainted($bar += 0);
547 test tainted($bar -= 2);
548 test tainted($bar *= -1);
549 test tainted($bar /= 1);
550 test tainted($bar--);
554 # Test assignment and return of lists
556 my @foo = ("A", "tainted" . $TAINT, "B");
557 test not tainted $foo[0];
558 test tainted $foo[1];
559 test not tainted $foo[2];
561 test not tainted $bar[0];
562 test tainted $bar[1];
563 test not tainted $bar[2];
564 my @baz = eval { "A", "tainted" . $TAINT, "B" };
565 test not tainted $baz[0];
566 test tainted $baz[1];
567 test not tainted $baz[2];
568 my @plugh = eval q[ "A", "tainted" . $TAINT, "B" ];
569 test not tainted $plugh[0];
570 test tainted $plugh[1];
571 test not tainted $plugh[2];
572 my $nautilus = sub { "A", "tainted" . $TAINT, "B" };
573 test not tainted ((&$nautilus)[0]);
574 test tainted ((&$nautilus)[1]);
575 test not tainted ((&$nautilus)[2]);
576 my @xyzzy = &$nautilus;
577 test not tainted $xyzzy[0];
578 test tainted $xyzzy[1];
579 test not tainted $xyzzy[2];
580 my $red_october = sub { return "A", "tainted" . $TAINT, "B" };
581 test not tainted ((&$red_october)[0]);
582 test tainted ((&$red_october)[1]);
583 test not tainted ((&$red_october)[2]);
584 my @corge = &$red_october;
585 test not tainted $corge[0];
586 test tainted $corge[1];
587 test not tainted $corge[2];
590 # Test for system/library calls returning string data of dubious origin.
592 # No reliable %Config check for getpw*
594 skip "getpwent() is not available", 1 unless
595 eval { setpwent(); getpwent() };
598 my @getpwent = getpwent();
599 die "getpwent: $!\n" unless (@getpwent);
600 test ( not tainted $getpwent[0]
601 and tainted $getpwent[1]
602 and not tainted $getpwent[2]
603 and not tainted $getpwent[3]
604 and not tainted $getpwent[4]
605 and not tainted $getpwent[5]
606 and tainted $getpwent[6] # ge?cos
607 and not tainted $getpwent[7]
608 and tainted $getpwent[8]); # shell
613 # pretty hard to imagine not
614 skip "readdir() is not available", 1 unless $Config{d_readdir};
617 opendir(D, "op") or die "opendir: $!\n";
618 my $readdir = readdir(D);
619 test tainted $readdir;
624 skip "readlink() or symlink() is not available" unless
625 $Config{d_readlink} && $Config{d_symlink};
627 my $symlink = "sl$$";
629 my $sl = "/something/naughty";
630 # it has to be a real path on Mac OS
631 $sl = MacPerl::MakePath((MacPerl::Volumes())[0]) if $Is_MacOS;
632 symlink($sl, $symlink) or die "symlink: $!\n";
633 my $readlink = readlink($symlink);
634 test tainted $readlink;
639 # test bitwise ops (regression bug)
649 # test target of substitution (regression bug)
651 my $why = $TAINT."y";
659 $why =~ s/e/'-'.$$/ge;
665 skip "no IPC::SysV", 2 unless $ipcsysv;
669 skip "shm*() not available", 1 unless $Config{d_shm};
675 my $id = shmget(IPC_PRIVATE, $size, S_IRWXU);
678 if (shmwrite($id, $sent, 0, 60)) {
679 if (shmread($id, $rcvd, 0, 60)) {
680 substr($rcvd, index($rcvd, "\0")) = '';
682 warn "# shmread failed: $!\n";
685 warn "# shmwrite failed: $!\n";
687 shmctl($id, IPC_RMID, 0) or warn "# shmctl failed: $!\n";
689 warn "# shmget failed: $!\n";
692 skip "SysV shared memory operation failed", 1 unless
701 skip "msg*() not available", 1 unless $Config{d_msg};
704 my $id = msgget(IPC_PRIVATE, IPC_CREAT | S_IRWXU);
706 my $sent = "message";
707 my $type_sent = 1234;
712 if (msgsnd($id, pack("l! a*", $type_sent, $sent), IPC_NOWAIT)) {
713 if (msgrcv($id, $rcvd, 60, 0, IPC_NOWAIT)) {
714 ($type_rcvd, $rcvd) = unpack("l! a*", $rcvd);
716 warn "# msgrcv failed: $!\n";
719 warn "# msgsnd failed: $!\n";
721 msgctl($id, IPC_RMID, 0) or warn "# msgctl failed: $!\n";
723 warn "# msgget failed\n";
727 skip "SysV message queue operation failed", 1
728 unless $rcvd eq $sent && $type_sent == $type_rcvd;
736 # bug id 20001004.006
738 open IN, $TEST or warn "$0: cannot read $TEST: $!" ;
743 ok tainted($a) && tainted($b) && !defined($b);
749 # bug id 20001004.007
751 open IN, $TEST or warn "$0: cannot read $TEST: $!" ;
757 ok !tainted($c->{a}) && tainted($c->{b});
762 ok tainted($d->{a}) && !tainted($d->{b});
766 b => { c => $a, d => 42 } };
767 ok !tainted($e->{a}) &&
769 tainted($e->{b}->{c}) &&
770 !tainted($e->{b}->{d});
776 # bug id 20010519.003
779 use vars qw($has_fcntl);
780 eval { require Fcntl; import Fcntl; };
787 skip "no Fcntl", 18 unless $has_fcntl;
789 my $evil = "foo" . $TAINT;
791 eval { sysopen(my $ro, $evil, &O_RDONLY) };
792 test $@ !~ /^Insecure dependency/, $@;
794 eval { sysopen(my $wo, $evil, &O_WRONLY) };
795 test $@ =~ /^Insecure dependency/, $@;
797 eval { sysopen(my $rw, $evil, &O_RDWR) };
798 test $@ =~ /^Insecure dependency/, $@;
800 eval { sysopen(my $ap, $evil, &O_APPEND) };
801 test $@ =~ /^Insecure dependency/, $@;
803 eval { sysopen(my $cr, $evil, &O_CREAT) };
804 test $@ =~ /^Insecure dependency/, $@;
806 eval { sysopen(my $tr, $evil, &O_TRUNC) };
807 test $@ =~ /^Insecure dependency/, $@;
809 eval { sysopen(my $ro, "foo", &O_RDONLY | $TAINT0) };
810 test $@ !~ /^Insecure dependency/, $@;
812 eval { sysopen(my $wo, "foo", &O_WRONLY | $TAINT0) };
813 test $@ =~ /^Insecure dependency/, $@;
815 eval { sysopen(my $rw, "foo", &O_RDWR | $TAINT0) };
816 test $@ =~ /^Insecure dependency/, $@;
818 eval { sysopen(my $ap, "foo", &O_APPEND | $TAINT0) };
819 test $@ =~ /^Insecure dependency/, $@;
821 eval { sysopen(my $cr, "foo", &O_CREAT | $TAINT0) };
822 test $@ =~ /^Insecure dependency/, $@;
824 eval { sysopen(my $tr, "foo", &O_TRUNC | $TAINT0) };
825 test $@ =~ /^Insecure dependency/, $@;
827 eval { sysopen(my $ro, "foo", &O_RDONLY, $TAINT0) };
828 test $@ !~ /^Insecure dependency/, $@;
830 eval { sysopen(my $wo, "foo", &O_WRONLY, $TAINT0) };
831 test $@ =~ /^Insecure dependency/, $@;
833 eval { sysopen(my $rw, "foo", &O_RDWR, $TAINT0) };
834 test $@ =~ /^Insecure dependency/, $@;
836 eval { sysopen(my $ap, "foo", &O_APPEND, $TAINT0) };
837 test $@ =~ /^Insecure dependency/, $@;
839 eval { sysopen(my $cr, "foo", &O_CREAT, $TAINT0) };
840 test $@ =~ /^Insecure dependency/, $@;
842 eval { sysopen(my $tr, "foo", &O_TRUNC, $TAINT0) };
843 test $@ =~ /^Insecure dependency/, $@;
845 unlink("foo"); # not unlink($evil), because that would fail...
855 local $SIG{__WARN__} = sub { $saw_warning = 1 };
858 my $divnum = shift()/1;
859 sprintf("%1.1f\n", $divnum);
871 # Bug ID 20010730.010
879 bless \$arg => $class;
890 my $bar = "The Big Bright Green Pleasure Machine";
892 tie my ($foo), Tie => $bar;
900 # Check that all environment variables are tainted.
902 while (my ($k, $v) = each %ENV) {
904 # These we have explicitly untainted or set earlier.
905 $k !~ /^(BASH_ENV|CDPATH|ENV|IFS|PATH|PERL_CORE|TEMP|TERM|TMP)$/) {
906 push @untainted, "# '$k' = '$v'\n";
909 test @untainted == 0, "untainted:\n @untainted";
913 ok( ${^TAINT} == 1, '$^TAINT is on' );
915 eval { ${^TAINT} = 0 };
916 ok( ${^TAINT}, '$^TAINT is not assignable' );
917 ok( $@ =~ /^Modification of a read-only value attempted/,
918 'Assigning to ${^TAINT} fails' );
923 my $re1 = qr/x$TAINT/;
926 my $re2 = qr/^$re1\z/;
934 skip "system {} has different semantics on Win32", 1 if $Is_MSWin32;
937 local $ENV{PATH} .= $TAINT;
938 eval { system { "echo" } "/arg0", "arg1" };
939 test $@ =~ /^Insecure \$ENV/;
943 todo_skip 'tainted %ENV warning occludes tainted arguments warning', 22
946 # bug 20020208.005 plus some single arg exec/system extras
947 my $err = qr/^Insecure dependency/ ;
948 test !eval { exec $TAINT, $TAINT }, 'exec';
950 test !eval { exec $TAINT $TAINT }, 'exec';
952 test !eval { exec $TAINT $TAINT, $TAINT }, 'exec';
954 test !eval { exec $TAINT 'notaint' }, 'exec';
956 test !eval { exec {'notaint'} $TAINT }, 'exec';
959 test !eval { system $TAINT, $TAINT }, 'system';
961 test !eval { system $TAINT $TAINT }, 'system';
963 test !eval { system $TAINT $TAINT, $TAINT }, 'system';
965 test !eval { system $TAINT 'notaint' }, 'system';
967 test !eval { system {'notaint'} $TAINT }, 'system';
972 system("lskdfj does not exist","with","args");
977 skip "no exec() on MacOS Classic" if $Is_MacOS;
981 exec("lskdfj does not exist","with","args");
986 # If you add tests here update also the above skip block for VMS.
990 # [ID 20020704.001] taint propagation failure
993 test tainted(my $foo = $1);
997 # [perl #24291] this used to dump core
998 our %nonmagicalenv = ( PATH => "util" );
999 local *ENV = \%nonmagicalenv;
1000 eval { system("lskdfj"); };
1001 test $@ =~ /^%ENV is aliased to another variable while running with -T switch/;
1002 local *ENV = *nonmagicalenv;
1003 eval { system("lskdfj"); };
1004 test $@ =~ /^%ENV is aliased to %nonmagicalenv while running with -T switch/;
1011 test !tainted($notaint);
1014 $notaint =~ /($notaint)/;
1018 $notaint =~ /($TAINT)/;
1023 $TAINT =~ /($notaint)/;
1027 $TAINT =~ /($TAINT)/;
1033 ($r = $TAINT) =~ /($notaint)/;
1035 ($r = $TAINT) =~ /($TAINT)/;
1039 # accessing $^O shoudn't taint it as a side-effect;
1040 # assigning tainted data to it is now an error
1043 if (!$^X) { } elsif ($^O eq 'bar') { }
1046 test $@ =~ /Insecure dependency in/;
1049 EFFECTIVELY_CONSTANTS: {
1050 my $tainted_number = 12 + $TAINT0;
1051 test tainted( $tainted_number );
1053 # Even though it's always 0, it's still tainted
1054 my $tainted_product = $tainted_number * 0;
1055 test tainted( $tainted_product );
1056 test $tainted_product == 0;
1059 TERNARY_CONDITIONALS: {
1060 my $tainted_true = $TAINT . "blah blah blah";
1061 my $tainted_false = $TAINT0;
1062 test tainted( $tainted_true );
1063 test tainted( $tainted_false );
1065 my $result = $tainted_true ? "True" : "False";
1066 test $result eq "True";
1067 test !tainted( $result );
1069 $result = $tainted_false ? "True" : "False";
1070 test $result eq "False";
1071 test !tainted( $result );
1073 my $untainted_whatever = "The Fabulous Johnny Cash";
1074 my $tainted_whatever = "Soft Cell" . $TAINT;
1076 $result = $tainted_true ? $tainted_whatever : $untainted_whatever;
1077 test $result eq "Soft Cell";
1078 test tainted( $result );
1080 $result = $tainted_false ? $tainted_whatever : $untainted_whatever;
1081 test $result eq "The Fabulous Johnny Cash";
1082 test !tainted( $result );
1086 # rt.perl.org 5900 $1 remains tainted if...
1087 # 1) The regular expression contains a scalar variable AND
1088 # 2) The regular expression appears in an elsif clause
1090 my $foo = "abcdefghi" . $TAINT;
1092 my $valid_chars = 'a-z';
1095 elsif ( $foo =~ /([$valid_chars]+)/o ) {
1096 test not tainted $1;
1101 elsif ( my @bar = $foo =~ /([$valid_chars]+)/o ) {
1102 test not any_tainted @bar;
1106 # at scope exit, a restored localised value should have its old
1107 # taint status, not the taint status of the current statement
1114 test not tainted $x99;
1116 my $c = do { local $x99; $^X };
1117 test not tainted $x99;
1123 my $c = do { local $x99; '' };
1127 # an mg_get of a tainted value during localization shouldn't taint the
1131 eval { local $0, eval '1' };
1135 # [perl #8262] //g loops infinitely on tainted data
1142 while($a[0]=~ m/(.)/g ) {
1143 last if $i++ > 10000;
1145 cmp_ok $i, '<', 10000, "infinite m//g";
1151 eval 'use Scalar::Util "dualvar"; $got_dualvar++';
1152 skip "No Scalar::Util::dualvar" unless $got_dualvar;
1153 my $a = Scalar::Util::dualvar(3, $^X);
1155 is ($b, 8, "Arithmetic on tainted dualvars works");
1158 # opening '|-' should not trigger $ENV{PATH} check
1162 skip "fork() is not available", 3 unless $Config{'d_fork'};
1163 skip "opening |- is not stable on threaded OpenBSD with taint", 3
1164 if $Config{useithreads} && $Is_OpenBSD;
1166 $ENV{'PATH'} = $TAINT;
1167 local $SIG{'PIPE'} = 'IGNORE';
1169 my $pid = open my $pipe, '|-';
1170 if (!defined $pid) {
1171 die "open failed: $!";
1174 kill 'KILL', $$; # child suicide
1178 test $@ !~ /Insecure \$ENV/, 'fork triggers %ENV check';
1179 test $@ eq '', 'pipe/fork/open/close failed';
1181 open my $pipe, "|$Invoke_Perl -e 1";
1184 test $@ =~ /Insecure \$ENV/, 'popen neglects %ENV check';
1189 package AUTOLOAD_TAINT;
1192 return if $AUTOLOAD =~ /DESTROY/;
1193 if ($AUTOLOAD =~ /untainted/) {
1194 main::ok(!main::tainted($AUTOLOAD), '$AUTOLOAD can be untainted');
1196 main::ok(main::tainted($AUTOLOAD), '$AUTOLOAD can be tainted');
1201 my $o = bless [], 'AUTOLOAD_TAINT';
1207 # tests for tainted format in s?printf
1208 eval { printf($TAINT . "# %s\n", "foo") };
1209 like($@, qr/^Insecure dependency in printf/, q/printf doesn't like tainted formats/);
1210 eval { printf("# %s\n", $TAINT . "foo") };
1211 ok(!$@, q/printf accepts other tainted args/);
1212 eval { sprintf($TAINT . "# %s\n", "foo") };
1213 like($@, qr/^Insecure dependency in sprintf/, q/sprintf doesn't like tainted formats/);
1214 eval { sprintf("# %s\n", $TAINT . "foo") };
1215 ok(!$@, q/sprintf accepts other tainted args/);
1224 is ($val, '7000000000', 'Assignment to untainted variable');
1227 is ($val, '7000000000', 'Assignment to tainted variable');
1232 my $tainted = '1' . $TAINT;
1233 eval '$val = eval $tainted;';
1234 is ($val, 0, "eval doesn't like tainted strings");
1235 like ($@, qr/^Insecure dependency in eval/);
1237 # Rather nice code to get a tainted undef by from Rick Delaney
1238 open FH, "test.pl" or die $!;
1239 seek FH, 0, 2 or die $!;
1242 eval 'eval $tainted';
1243 like ($@, qr/^Insecure dependency in eval/);
1246 foreach my $ord (78, 163, 256) {
1248 my $line = 'A1' . $TAINT . chr $ord;
1252 ok(!tainted($1), "\\S match with chr $ord");
1257 sub cr { my $x = crypt($_[0], $_[1]); $x }
1258 sub co { my $x = ~$_[0]; $x }
1260 $a = cr('hello', 'foo' . $TAINT);
1261 $b = cr('hello', 'foo');
1262 ok(tainted($a), "tainted crypt");
1263 ok(!tainted($b), "untainted crypt");
1264 $a = co('foo' . $TAINT);
1266 ok(tainted($a), "tainted complement");
1267 ok(!tainted($b), "untainted complement");
1271 my @data = qw(bonk zam zlonk qunckkk);
1272 # Clearly some sort of usenet bang-path
1273 my $string = $TAINT . join "!", @data;
1275 ok(tainted($string), "tainted data");
1277 my @got = split /!|,/, $string;
1279 # each @got would be useful here, but I want the test for earlier perls
1280 for my $i (0 .. $#data) {
1281 ok(tainted($got[$i]), "tainted result $i");
1282 is($got[$i], $data[$i], "correct content $i");
1285 ok(tainted($string), "still tainted data");
1287 my @got = split /[!,]/, $string;
1289 # each @got would be useful here, but I want the test for earlier perls
1290 for my $i (0 .. $#data) {
1291 ok(tainted($got[$i]), "tainted result $i");
1292 is($got[$i], $data[$i], "correct content $i");
1295 ok(tainted($string), "still tainted data");
1297 my @got = split /!/, $string;
1299 # each @got would be useful here, but I want the test for earlier perls
1300 for my $i (0 .. $#data) {
1301 ok(tainted($got[$i]), "tainted result $i");
1302 is($got[$i], $data[$i], "correct content $i");
1306 # This may bomb out with the alarm signal so keep it last
1308 skip "No alarm()" unless $Config{d_alarm};
1309 # Test from RT #41831]
1310 # [PATCH] Bug & fix: hang when using study + taint mode (perl 5.6.1, 5.8.x)
1312 my $DATA = <<'END' . $TAINT;
1322 ## don't set $SIG{ALRM}, since we'd never get to a user-level handler as
1323 ## perl is stuck in a regexp infinite loop!
1327 if ($DATA =~ /^line2.*line4/m) {
1328 fail("Should not be a match")
1330 pass("Match on tainted multiline data should fail promptly");
1336 # Keep the previous test last