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Don’t taint return value of s///e based on replacement
[perl5.git] / t / op / taint.t
CommitLineData
1e422769
PP
1#!./perl -T
2#
3# Taint tests by Tom Phoenix <rootbeer@teleport.com>.
4#
5# I don't claim to know all about tainting. If anyone sees
9607fc9c 6# tests that I've missed here, please add them. But this is
1e422769
PP
7# better than having no tests at all, right?
8#
9
10BEGIN {
11 chdir 't' if -d 't';
20822f61 12 @INC = '../lib';
632e037a
NC
13 require './test.pl';
14 skip_all_if_miniperl("no dynamic loading on miniperl, no re");
1e422769
PP
15}
16
17use strict;
18use Config;
19
7fb31b92 20plan tests => 797;
7c36658b 21
0ecd3ba2
MG
22$| = 1;
23
c9f931b8
JH
24use vars qw($ipcsysv); # did we manage to load IPC::SysV?
25
ff504b36 26my ($old_env_path, $old_env_dcl_path, $old_env_term);
3eeba6fb 27BEGIN {
ff504b36
JM
28 $old_env_path = $ENV{'PATH'};
29 $old_env_dcl_path = $ENV{'DCL$PATH'};
30 $old_env_term = $ENV{'TERM'};
3eeba6fb
CB
31 if ($^O eq 'VMS' && !defined($Config{d_setenv})) {
32 $ENV{PATH} = $ENV{PATH};
33 $ENV{TERM} = $ENV{TERM} ne ''? $ENV{TERM} : 'dummy';
34 }
be3174d2
GS
35 if ($Config{'extensions'} =~ /\bIPC\/SysV\b/
36 && ($Config{d_shm} || $Config{d_msg})) {
c9f931b8
JH
37 eval { require IPC::SysV };
38 unless ($@) {
39 $ipcsysv++;
ddc3217d 40 IPC::SysV->import(qw(IPC_PRIVATE IPC_RMID IPC_CREAT S_IRWXU IPC_NOWAIT));
c9f931b8 41 }
b9d1c439 42 }
3eeba6fb
CB
43}
44
09f04786
MS
45my $Is_VMS = $^O eq 'VMS';
46my $Is_MSWin32 = $^O eq 'MSWin32';
47my $Is_NetWare = $^O eq 'NetWare';
48my $Is_Dos = $^O eq 'dos';
49my $Is_Cygwin = $^O eq 'cygwin';
8c2c7bd1 50my $Is_OpenBSD = $^O eq 'openbsd';
1fb83d06 51my $Is_MirBSD = $^O eq 'mirbsd';
08322f8f 52my $Invoke_Perl = $Is_VMS ? 'MCR Sys$Disk:[]Perl.exe' :
09f04786 53 $Is_MSWin32 ? '.\perl' :
7b903762 54 $Is_NetWare ? 'perl' :
09f04786 55 './perl' ;
c90c0ff4 56my @MoreEnv = qw/IFS CDPATH ENV BASH_ENV/;
7bac28a0 57
1e422769 58if ($Is_VMS) {
7bac28a0
PP
59 my (%old, $x);
60 for $x ('DCL$PATH', @MoreEnv) {
61 ($old{$x}) = $ENV{$x} =~ /^(.*)$/ if exists $ENV{$x};
62 }
ff504b36
JM
63 # VMS note: PATH and TERM are automatically created by the C
64 # library in VMS on reference to the their keys in %ENV.
65 # There is currently no way to determine if they did not exist
66 # before this test was run.
1e422769
PP
67 eval <<EndOfCleanup;
68 END {
ff504b36
JM
69 \$ENV{PATH} = \$old_env_path;
70 warn "# Note: logical name 'PATH' may have been created\n";
71 \$ENV{'TERM'} = \$old_env_term;
72 warn "# Note: logical name 'TERM' may have been created\n";
562a7b0c 73 \@ENV{keys %old} = values %old;
ff504b36
JM
74 if (defined \$old_env_dcl_path) {
75 \$ENV{'DCL\$PATH'} = \$old_env_dcl_path;
76 } else {
77 delete \$ENV{'DCL\$PATH'};
78 }
1e422769
PP
79 }
80EndOfCleanup
81}
82
83# Sources of taint:
84# The empty tainted value, for tainting strings
85my $TAINT = substr($^X, 0, 0);
86# A tainted zero, useful for tainting numbers
09f04786
MS
87my $TAINT0;
88{
89 no warnings;
90 $TAINT0 = 0 + $TAINT;
91}
1e422769
PP
92
93# This taints each argument passed. All must be lvalues.
94# Side effect: It also stringifies them. :-(
95sub taint_these (@) {
96 for (@_) { $_ .= $TAINT }
97}
98
99# How to identify taint when you see it
1e422769 100sub tainted ($) {
6e7325e5 101 local $@; # Don't pollute caller's value.
81cba34d 102 not eval { join("",@_), kill 0; 1 };
1e422769 103}
1e422769 104
f37ea7f0
NC
105sub is_tainted {
106 my $thing = shift;
107 local $::Level = $::Level + 1;
81cba34d 108 ok(tainted($thing), @_);
f37ea7f0
NC
109}
110
111sub isnt_tainted {
112 my $thing = shift;
113 local $::Level = $::Level + 1;
81cba34d 114 ok(!tainted($thing), @_);
f37ea7f0
NC
115}
116
8184526b 117sub violates_taint {
ef5cbc63
NC
118 my ($code, $what, $desc) = @_;
119 $desc //= $what;
8184526b
NC
120 local $::Level = $::Level + 1;
121 is(eval { $code->(); }, undef, $desc);
ef5cbc63 122 like($@, qr/^Insecure dependency in $what while running with -T switch/);
8184526b
NC
123}
124
1e422769 125# We need an external program to call.
7b903762 126my $ECHO = ($Is_MSWin32 ? ".\\echo$$" : ($Is_NetWare ? "echo$$" : "./echo$$"));
1e422769 127END { unlink $ECHO }
22d7dfed
NC
128open my $fh, '>', $ECHO or die "Can't create $ECHO: $!";
129print $fh 'print "@ARGV\n"', "\n";
130close $fh;
1e422769
PP
131my $echo = "$Invoke_Perl $ECHO";
132
22d7dfed 133my $TEST = 'TEST';
dc459aad 134
1e422769
PP
135# First, let's make sure that Perl is checking the dangerous
136# environment variables. Maybe they aren't set yet, so we'll
137# taint them ourselves.
138{
139 $ENV{'DCL$PATH'} = '' if $Is_VMS;
140
e59c8b07 141 $ENV{PATH} = ($Is_Cygwin) ? '/usr/bin' : '';
c90c0ff4 142 delete @ENV{@MoreEnv};
7bac28a0
PP
143 $ENV{TERM} = 'dumb';
144
c3197de1 145 is(eval { `$echo 1` }, "1\n");
09f04786
MS
146
147 SKIP: {
148 skip "Environment tainting tests skipped", 4
7b903762 149 if $Is_MSWin32 || $Is_NetWare || $Is_VMS || $Is_Dos;
7bac28a0 150
7bac28a0
PP
151 my @vars = ('PATH', @MoreEnv);
152 while (my $v = $vars[0]) {
153 local $ENV{$v} = $TAINT;
154 last if eval { `$echo 1` };
2a53d331 155 last unless $@ =~ /^Insecure \$ENV\{$v}/;
7bac28a0
PP
156 shift @vars;
157 }
c3197de1 158 is("@vars", "");
c90c0ff4
PP
159
160 # tainted $TERM is unsafe only if it contains metachars
161 local $ENV{TERM};
162 $ENV{TERM} = 'e=mc2';
c3197de1 163 is(eval { `$echo 1` }, "1\n");
c90c0ff4 164 $ENV{TERM} = 'e=mc2' . $TAINT;
c3197de1 165 is(eval { `$echo 1` }, undef);
2a53d331 166 like($@, qr/^Insecure \$ENV\{TERM}/);
5aabfad6 167 }
7bac28a0 168
9607fc9c 169 my $tmp;
2986a63f 170 if ($^O eq 'os2' || $^O eq 'amigaos' || $Is_MSWin32 || $Is_NetWare || $Is_Dos) {
48c036b1
GS
171 print "# all directories are writeable\n";
172 }
173 else {
9607fc9c 174 $tmp = (grep { defined and -d and (stat _)[2] & 2 }
099f76bb 175 qw(sys$scratch /tmp /var/tmp /usr/tmp),
9607fc9c
PP
176 @ENV{qw(TMP TEMP)})[0]
177 or print "# can't find world-writeable directory to test PATH\n";
178 }
179
09f04786
MS
180 SKIP: {
181 skip "all directories are writeable", 2 unless $tmp;
182
7bac28a0 183 local $ENV{PATH} = $tmp;
c3197de1 184 is(eval { `$echo 1` }, undef);
2a53d331 185 like($@, qr/^Insecure directory in \$ENV\{PATH}/);
1e422769
PP
186 }
187
09f04786
MS
188 SKIP: {
189 skip "This is not VMS", 4 unless $Is_VMS;
190
1e422769 191 $ENV{'DCL$PATH'} = $TAINT;
81e6f6d0 192 is(eval { `$echo 1` }, undef);
2a53d331 193 like($@, qr/^Insecure \$ENV\{DCL\$PATH}/);
09f04786
MS
194 SKIP: {
195 skip q[can't find world-writeable directory to test DCL$PATH], 2
25fb98c0 196 unless $tmp;
09f04786 197
9607fc9c 198 $ENV{'DCL$PATH'} = $tmp;
81e6f6d0 199 is(eval { `$echo 1` }, undef);
2a53d331 200 like($@, qr/^Insecure directory in \$ENV\{DCL\$PATH}/);
9607fc9c 201 }
1e422769
PP
202 $ENV{'DCL$PATH'} = '';
203 }
1e422769
PP
204}
205
206# Let's see that we can taint and untaint as needed.
207{
208 my $foo = $TAINT;
f37ea7f0 209 is_tainted($foo);
9607fc9c
PP
210
211 # That was a sanity check. If it failed, stop the insanity!
212 die "Taint checks don't seem to be enabled" unless tainted $foo;
1e422769
PP
213
214 $foo = "foo";
f37ea7f0 215 isnt_tainted($foo);
1e422769
PP
216
217 taint_these($foo);
f37ea7f0 218 is_tainted($foo);
1e422769
PP
219
220 my @list = 1..10;
81cba34d 221 isnt_tainted($_) foreach @list;
1e422769 222 taint_these @list[1,3,5,7,9];
e75436bf 223 is_tainted($_) foreach @list[1,3,5,7,9];
81cba34d 224 isnt_tainted($_) foreach @list[0,2,4,6,8];
1e422769
PP
225
226 ($foo) = $foo =~ /(.+)/;
f37ea7f0 227 isnt_tainted($foo);
1e422769 228
c769ddc7
DM
229 my ($desc, $s, $res, $res2, $one);
230
231 $desc = "match with string tainted";
232
233 $s = 'abcd' . $TAINT;
234 $res = $s =~ /(.+)/;
235 $one = $1;
f37ea7f0
NC
236 is_tainted($s, "$desc: s tainted");
237 isnt_tainted($res, "$desc: res not tainted");
238 isnt_tainted($one, "$desc: \$1 not tainted");
c769ddc7
DM
239 is($res, 1, "$desc: res value");
240 is($one, 'abcd', "$desc: \$1 value");
241
242 $desc = "match /g with string tainted";
243
244 $s = 'abcd' . $TAINT;
245 $res = $s =~ /(.)/g;
246 $one = $1;
f37ea7f0
NC
247 is_tainted($s, "$desc: s tainted");
248 isnt_tainted($res, "$desc: res not tainted");
249 isnt_tainted($one, "$desc: \$1 not tainted");
c769ddc7
DM
250 is($res, 1, "$desc: res value");
251 is($one, 'a', "$desc: \$1 value");
252
253 $desc = "match with string tainted, list cxt";
254
255 $s = 'abcd' . $TAINT;
256 ($res) = $s =~ /(.+)/;
257 $one = $1;
f37ea7f0
NC
258 is_tainted($s, "$desc: s tainted");
259 isnt_tainted($res, "$desc: res not tainted");
260 isnt_tainted($one, "$desc: \$1 not tainted");
c769ddc7
DM
261 is($res, 'abcd', "$desc: res value");
262 is($one, 'abcd', "$desc: \$1 value");
263
264 $desc = "match /g with string tainted, list cxt";
265
266 $s = 'abcd' . $TAINT;
267 ($res, $res2) = $s =~ /(.)/g;
268 $one = $1;
f37ea7f0
NC
269 is_tainted($s, "$desc: s tainted");
270 isnt_tainted($res, "$desc: res not tainted");
271 isnt_tainted($res2,"$desc: res2 not tainted");
272 isnt_tainted($one, "$desc: \$1 not tainted");
c769ddc7
DM
273 is($res, 'a', "$desc: res value");
274 is($res2,'b', "$desc: res2 value");
275 is($one, 'd', "$desc: \$1 value");
276
277 $desc = "match with pattern tainted";
278
279 $s = 'abcd';
280 $res = $s =~ /$TAINT(.+)/;
281 $one = $1;
f37ea7f0
NC
282 isnt_tainted($s, "$desc: s not tainted");
283 isnt_tainted($res, "$desc: res not tainted");
284 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
285 is($res, 1, "$desc: res value");
286 is($one, 'abcd', "$desc: \$1 value");
287
288 $desc = "match /g with pattern tainted";
289
290 $s = 'abcd';
291 $res = $s =~ /$TAINT(.)/g;
292 $one = $1;
f37ea7f0
NC
293 isnt_tainted($s, "$desc: s not tainted");
294 isnt_tainted($res, "$desc: res not tainted");
295 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
296 is($res, 1, "$desc: res value");
297 is($one, 'a', "$desc: \$1 value");
298
299 $desc = "match with pattern tainted via locale";
300
301 $s = 'abcd';
302 { use locale; $res = $s =~ /(\w+)/; $one = $1; }
f37ea7f0
NC
303 isnt_tainted($s, "$desc: s not tainted");
304 isnt_tainted($res, "$desc: res not tainted");
305 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
306 is($res, 1, "$desc: res value");
307 is($one, 'abcd', "$desc: \$1 value");
308
309 $desc = "match /g with pattern tainted via locale";
310
311 $s = 'abcd';
312 { use locale; $res = $s =~ /(\w)/g; $one = $1; }
f37ea7f0
NC
313 isnt_tainted($s, "$desc: s not tainted");
314 isnt_tainted($res, "$desc: res not tainted");
315 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
316 is($res, 1, "$desc: res value");
317 is($one, 'a', "$desc: \$1 value");
318
319 $desc = "match with pattern tainted, list cxt";
320
321 $s = 'abcd';
322 ($res) = $s =~ /$TAINT(.+)/;
323 $one = $1;
f37ea7f0
NC
324 isnt_tainted($s, "$desc: s not tainted");
325 is_tainted($res, "$desc: res tainted");
326 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
327 is($res, 'abcd', "$desc: res value");
328 is($one, 'abcd', "$desc: \$1 value");
329
330 $desc = "match /g with pattern tainted, list cxt";
331
332 $s = 'abcd';
333 ($res, $res2) = $s =~ /$TAINT(.)/g;
334 $one = $1;
f37ea7f0
NC
335 isnt_tainted($s, "$desc: s not tainted");
336 is_tainted($res, "$desc: res tainted");
337 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
338 is($res, 'a', "$desc: res value");
339 is($res2,'b', "$desc: res2 value");
340 is($one, 'd', "$desc: \$1 value");
341
342 $desc = "match with pattern tainted via locale, list cxt";
343
344 $s = 'abcd';
345 { use locale; ($res) = $s =~ /(\w+)/; $one = $1; }
f37ea7f0
NC
346 isnt_tainted($s, "$desc: s not tainted");
347 is_tainted($res, "$desc: res tainted");
348 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
349 is($res, 'abcd', "$desc: res value");
350 is($one, 'abcd', "$desc: \$1 value");
351
352 $desc = "match /g with pattern tainted via locale, list cxt";
353
354 $s = 'abcd';
355 { use locale; ($res, $res2) = $s =~ /(\w)/g; $one = $1; }
f37ea7f0
NC
356 isnt_tainted($s, "$desc: s not tainted");
357 is_tainted($res, "$desc: res tainted");
358 is_tainted($res2, "$desc: res2 tainted");
359 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
360 is($res, 'a', "$desc: res value");
361 is($res2,'b', "$desc: res2 value");
362 is($one, 'd', "$desc: \$1 value");
363
364 $desc = "substitution with string tainted";
365
366 $s = 'abcd' . $TAINT;
367 $res = $s =~ s/(.+)/xyz/;
368 $one = $1;
f37ea7f0
NC
369 is_tainted($s, "$desc: s tainted");
370 isnt_tainted($res, "$desc: res not tainted");
371 isnt_tainted($one, "$desc: \$1 not tainted");
c769ddc7
DM
372 is($s, 'xyz', "$desc: s value");
373 is($res, 1, "$desc: res value");
374 is($one, 'abcd', "$desc: \$1 value");
375
376 $desc = "substitution /g with string tainted";
377
378 $s = 'abcd' . $TAINT;
379 $res = $s =~ s/(.)/x/g;
380 $one = $1;
f37ea7f0
NC
381 is_tainted($s, "$desc: s tainted");
382 is_tainted($res, "$desc: res tainted");
383 isnt_tainted($one, "$desc: \$1 not tainted");
c769ddc7
DM
384 is($s, 'xxxx', "$desc: s value");
385 is($res, 4, "$desc: res value");
386 is($one, 'd', "$desc: \$1 value");
387
388 $desc = "substitution /r with string tainted";
389
390 $s = 'abcd' . $TAINT;
391 $res = $s =~ s/(.+)/xyz/r;
392 $one = $1;
f37ea7f0
NC
393 is_tainted($s, "$desc: s tainted");
394 is_tainted($res, "$desc: res tainted");
395 isnt_tainted($one, "$desc: \$1 not tainted");
c769ddc7
DM
396 is($s, 'abcd', "$desc: s value");
397 is($res, 'xyz', "$desc: res value");
398 is($one, 'abcd', "$desc: \$1 value");
399
20be6587
DM
400 $desc = "substitution /e with string tainted";
401
402 $s = 'abcd' . $TAINT;
403 $one = '';
404 $res = $s =~ s{(.+)}{
405 $one = $one . "x"; # make sure code not tainted
f37ea7f0 406 isnt_tainted($one, "$desc: code not tainted within /e");
20be6587 407 $one = $1;
f37ea7f0 408 isnt_tainted($one, "$desc: \$1 not tainted within /e");
20be6587
DM
409 "xyz";
410 }e;
411 $one = $1;
f37ea7f0
NC
412 is_tainted($s, "$desc: s tainted");
413 isnt_tainted($res, "$desc: res not tainted");
414 isnt_tainted($one, "$desc: \$1 not tainted");
20be6587
DM
415 is($s, 'xyz', "$desc: s value");
416 is($res, 1, "$desc: res value");
417 is($one, 'abcd', "$desc: \$1 value");
418
c769ddc7
DM
419 $desc = "substitution with pattern tainted";
420
421 $s = 'abcd';
422 $res = $s =~ s/$TAINT(.+)/xyz/;
423 $one = $1;
f37ea7f0
NC
424 is_tainted($s, "$desc: s tainted");
425 isnt_tainted($res, "$desc: res not tainted");
426 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
427 is($s, 'xyz', "$desc: s value");
428 is($res, 1, "$desc: res value");
429 is($one, 'abcd', "$desc: \$1 value");
430
431 $desc = "substitution /g with pattern tainted";
432
433 $s = 'abcd';
434 $res = $s =~ s/$TAINT(.)/x/g;
435 $one = $1;
f37ea7f0
NC
436 is_tainted($s, "$desc: s tainted");
437 is_tainted($res, "$desc: res tainted");
438 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
439 is($s, 'xxxx', "$desc: s value");
440 is($res, 4, "$desc: res value");
441 is($one, 'd', "$desc: \$1 value");
442
20be6587
DM
443 $desc = "substitution /ge with pattern tainted";
444
445 $s = 'abc';
446 {
447 my $i = 0;
448 my $j;
449 $res = $s =~ s{(.)$TAINT}{
450 $j = $i; # make sure code not tainted
451 $one = $1;
f37ea7f0 452 isnt_tainted($j, "$desc: code not tainted within /e");
20be6587
DM
453 $i++;
454 if ($i == 1) {
f37ea7f0 455 isnt_tainted($s, "$desc: s not tainted loop 1");
20be6587
DM
456 }
457 else {
f37ea7f0 458 is_tainted($s, "$desc: s tainted loop $i");
20be6587 459 }
f37ea7f0 460 is_tainted($one, "$desc: \$1 tainted loop $i");
20be6587
DM
461 $i.$TAINT;
462 }ge;
463 $one = $1;
464 }
f37ea7f0
NC
465 is_tainted($s, "$desc: s tainted");
466 is_tainted($res, "$desc: res tainted");
467 is_tainted($one, "$desc: \$1 tainted");
20be6587
DM
468 is($s, '123', "$desc: s value");
469 is($res, 3, "$desc: res value");
470 is($one, 'c', "$desc: \$1 value");
471
c769ddc7
DM
472 $desc = "substitution /r with pattern tainted";
473
474 $s = 'abcd';
475 $res = $s =~ s/$TAINT(.+)/xyz/r;
476 $one = $1;
f37ea7f0
NC
477 isnt_tainted($s, "$desc: s not tainted");
478 is_tainted($res, "$desc: res tainted");
479 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
480 is($s, 'abcd', "$desc: s value");
481 is($res, 'xyz', "$desc: res value");
482 is($one, 'abcd', "$desc: \$1 value");
483
484 $desc = "substitution with pattern tainted via locale";
485
486 $s = 'abcd';
487 { use locale; $res = $s =~ s/(\w+)/xyz/; $one = $1; }
f37ea7f0
NC
488 is_tainted($s, "$desc: s tainted");
489 isnt_tainted($res, "$desc: res not tainted");
490 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
491 is($s, 'xyz', "$desc: s value");
492 is($res, 1, "$desc: res value");
493 is($one, 'abcd', "$desc: \$1 value");
494
495 $desc = "substitution /g with pattern tainted via locale";
496
497 $s = 'abcd';
498 { use locale; $res = $s =~ s/(\w)/x/g; $one = $1; }
f37ea7f0
NC
499 is_tainted($s, "$desc: s tainted");
500 is_tainted($res, "$desc: res tainted");
501 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
502 is($s, 'xxxx', "$desc: s value");
503 is($res, 4, "$desc: res value");
504 is($one, 'd', "$desc: \$1 value");
505
506 $desc = "substitution /r with pattern tainted via locale";
507
508 $s = 'abcd';
509 { use locale; $res = $s =~ s/(\w+)/xyz/r; $one = $1; }
f37ea7f0
NC
510 isnt_tainted($s, "$desc: s not tainted");
511 is_tainted($res, "$desc: res tainted");
512 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
513 is($s, 'abcd', "$desc: s value");
514 is($res, 'xyz', "$desc: res value");
515 is($one, 'abcd', "$desc: \$1 value");
516
517 $desc = "substitution with replacement tainted";
518
519 $s = 'abcd';
520 $res = $s =~ s/(.+)/xyz$TAINT/;
521 $one = $1;
f37ea7f0
NC
522 is_tainted($s, "$desc: s tainted");
523 isnt_tainted($res, "$desc: res not tainted");
524 isnt_tainted($one, "$desc: \$1 not tainted");
c769ddc7
DM
525 is($s, 'xyz', "$desc: s value");
526 is($res, 1, "$desc: res value");
527 is($one, 'abcd', "$desc: \$1 value");
528
529 $desc = "substitution /g with replacement tainted";
530
531 $s = 'abcd';
532 $res = $s =~ s/(.)/x$TAINT/g;
533 $one = $1;
f37ea7f0
NC
534 is_tainted($s, "$desc: s tainted");
535 isnt_tainted($res, "$desc: res not tainted");
536 isnt_tainted($one, "$desc: \$1 not tainted");
c769ddc7
DM
537 is($s, 'xxxx', "$desc: s value");
538 is($res, 4, "$desc: res value");
539 is($one, 'd', "$desc: \$1 value");
540
20be6587
DM
541 $desc = "substitution /ge with replacement tainted";
542
543 $s = 'abc';
544 {
545 my $i = 0;
546 my $j;
547 $res = $s =~ s{(.)}{
548 $j = $i; # make sure code not tainted
549 $one = $1;
f37ea7f0 550 isnt_tainted($j, "$desc: code not tainted within /e");
20be6587
DM
551 $i++;
552 if ($i == 1) {
f37ea7f0 553 isnt_tainted($s, "$desc: s not tainted loop 1");
20be6587
DM
554 }
555 else {
f37ea7f0 556 is_tainted($s, "$desc: s tainted loop $i");
20be6587 557 }
f37ea7f0 558 isnt_tainted($one, "$desc: \$1 not tainted within /e");
20be6587
DM
559 $i.$TAINT;
560 }ge;
561 $one = $1;
562 }
f37ea7f0 563 is_tainted($s, "$desc: s tainted");
52c47e16 564 isnt_tainted($res, "$desc: res tainted");
f37ea7f0 565 isnt_tainted($one, "$desc: \$1 not tainted");
20be6587
DM
566 is($s, '123', "$desc: s value");
567 is($res, 3, "$desc: res value");
568 is($one, 'c', "$desc: \$1 value");
569
c769ddc7
DM
570 $desc = "substitution /r with replacement tainted";
571
572 $s = 'abcd';
573 $res = $s =~ s/(.+)/xyz$TAINT/r;
574 $one = $1;
f37ea7f0
NC
575 isnt_tainted($s, "$desc: s not tainted");
576 is_tainted($res, "$desc: res tainted");
577 isnt_tainted($one, "$desc: \$1 not tainted");
c769ddc7
DM
578 is($s, 'abcd', "$desc: s value");
579 is($res, 'xyz', "$desc: res value");
580 is($one, 'abcd', "$desc: \$1 value");
1e422769 581
b3eb6a9b 582 {
c769ddc7
DM
583 # now do them all again with "use re 'taint"
584
585 use re 'taint';
586
587 $desc = "use re 'taint': match with string tainted";
588
589 $s = 'abcd' . $TAINT;
590 $res = $s =~ /(.+)/;
591 $one = $1;
f37ea7f0
NC
592 is_tainted($s, "$desc: s tainted");
593 isnt_tainted($res, "$desc: res not tainted");
594 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
595 is($res, 1, "$desc: res value");
596 is($one, 'abcd', "$desc: \$1 value");
597
598 $desc = "use re 'taint': match /g with string tainted";
599
600 $s = 'abcd' . $TAINT;
601 $res = $s =~ /(.)/g;
602 $one = $1;
f37ea7f0
NC
603 is_tainted($s, "$desc: s tainted");
604 isnt_tainted($res, "$desc: res not tainted");
605 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
606 is($res, 1, "$desc: res value");
607 is($one, 'a', "$desc: \$1 value");
608
609 $desc = "use re 'taint': match with string tainted, list cxt";
610
611 $s = 'abcd' . $TAINT;
612 ($res) = $s =~ /(.+)/;
613 $one = $1;
f37ea7f0
NC
614 is_tainted($s, "$desc: s tainted");
615 is_tainted($res, "$desc: res tainted");
616 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
617 is($res, 'abcd', "$desc: res value");
618 is($one, 'abcd', "$desc: \$1 value");
619
620 $desc = "use re 'taint': match /g with string tainted, list cxt";
621
622 $s = 'abcd' . $TAINT;
623 ($res, $res2) = $s =~ /(.)/g;
624 $one = $1;
f37ea7f0
NC
625 is_tainted($s, "$desc: s tainted");
626 is_tainted($res, "$desc: res tainted");
627 is_tainted($res2, "$desc: res2 tainted");
628 is_tainted($one, "$desc: \$1 not tainted");
c769ddc7
DM
629 is($res, 'a', "$desc: res value");
630 is($res2,'b', "$desc: res2 value");
631 is($one, 'd', "$desc: \$1 value");
632
633 $desc = "use re 'taint': match with pattern tainted";
634
635 $s = 'abcd';
636 $res = $s =~ /$TAINT(.+)/;
637 $one = $1;
f37ea7f0
NC
638 isnt_tainted($s, "$desc: s not tainted");
639 isnt_tainted($res, "$desc: res not tainted");
640 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
641 is($res, 1, "$desc: res value");
642 is($one, 'abcd', "$desc: \$1 value");
643
644 $desc = "use re 'taint': match /g with pattern tainted";
645
646 $s = 'abcd';
647 $res = $s =~ /$TAINT(.)/g;
648 $one = $1;
f37ea7f0
NC
649 isnt_tainted($s, "$desc: s not tainted");
650 isnt_tainted($res, "$desc: res not tainted");
651 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
652 is($res, 1, "$desc: res value");
653 is($one, 'a', "$desc: \$1 value");
654
655 $desc = "use re 'taint': match with pattern tainted via locale";
656
657 $s = 'abcd';
658 { use locale; $res = $s =~ /(\w+)/; $one = $1; }
f37ea7f0
NC
659 isnt_tainted($s, "$desc: s not tainted");
660 isnt_tainted($res, "$desc: res not tainted");
661 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
662 is($res, 1, "$desc: res value");
663 is($one, 'abcd', "$desc: \$1 value");
664
665 $desc = "use re 'taint': match /g with pattern tainted via locale";
666
667 $s = 'abcd';
668 { use locale; $res = $s =~ /(\w)/g; $one = $1; }
f37ea7f0
NC
669 isnt_tainted($s, "$desc: s not tainted");
670 isnt_tainted($res, "$desc: res not tainted");
671 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
672 is($res, 1, "$desc: res value");
673 is($one, 'a', "$desc: \$1 value");
674
675 $desc = "use re 'taint': match with pattern tainted, list cxt";
676
677 $s = 'abcd';
678 ($res) = $s =~ /$TAINT(.+)/;
679 $one = $1;
f37ea7f0
NC
680 isnt_tainted($s, "$desc: s not tainted");
681 is_tainted($res, "$desc: res tainted");
682 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
683 is($res, 'abcd', "$desc: res value");
684 is($one, 'abcd', "$desc: \$1 value");
685
686 $desc = "use re 'taint': match /g with pattern tainted, list cxt";
687
688 $s = 'abcd';
689 ($res, $res2) = $s =~ /$TAINT(.)/g;
690 $one = $1;
f37ea7f0
NC
691 isnt_tainted($s, "$desc: s not tainted");
692 is_tainted($res, "$desc: res tainted");
693 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
694 is($res, 'a', "$desc: res value");
695 is($res2,'b', "$desc: res2 value");
696 is($one, 'd', "$desc: \$1 value");
697
698 $desc = "use re 'taint': match with pattern tainted via locale, list cxt";
699
700 $s = 'abcd';
701 { use locale; ($res) = $s =~ /(\w+)/; $one = $1; }
f37ea7f0
NC
702 isnt_tainted($s, "$desc: s not tainted");
703 is_tainted($res, "$desc: res tainted");
704 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
705 is($res, 'abcd', "$desc: res value");
706 is($one, 'abcd', "$desc: \$1 value");
707
708 $desc = "use re 'taint': match /g with pattern tainted via locale, list cxt";
709
710 $s = 'abcd';
711 { use locale; ($res, $res2) = $s =~ /(\w)/g; $one = $1; }
f37ea7f0
NC
712 isnt_tainted($s, "$desc: s not tainted");
713 is_tainted($res, "$desc: res tainted");
714 is_tainted($res2, "$desc: res2 tainted");
715 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
716 is($res, 'a', "$desc: res value");
717 is($res2,'b', "$desc: res2 value");
718 is($one, 'd', "$desc: \$1 value");
719
720 $desc = "use re 'taint': substitution with string tainted";
721
722 $s = 'abcd' . $TAINT;
723 $res = $s =~ s/(.+)/xyz/;
724 $one = $1;
f37ea7f0
NC
725 is_tainted($s, "$desc: s tainted");
726 isnt_tainted($res, "$desc: res not tainted");
727 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
728 is($s, 'xyz', "$desc: s value");
729 is($res, 1, "$desc: res value");
730 is($one, 'abcd', "$desc: \$1 value");
731
732 $desc = "use re 'taint': substitution /g with string tainted";
733
734 $s = 'abcd' . $TAINT;
735 $res = $s =~ s/(.)/x/g;
736 $one = $1;
f37ea7f0
NC
737 is_tainted($s, "$desc: s tainted");
738 is_tainted($res, "$desc: res tainted");
739 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
740 is($s, 'xxxx', "$desc: s value");
741 is($res, 4, "$desc: res value");
742 is($one, 'd', "$desc: \$1 value");
743
744 $desc = "use re 'taint': substitution /r with string tainted";
745
746 $s = 'abcd' . $TAINT;
747 $res = $s =~ s/(.+)/xyz/r;
748 $one = $1;
f37ea7f0
NC
749 is_tainted($s, "$desc: s tainted");
750 is_tainted($res, "$desc: res tainted");
751 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
752 is($s, 'abcd', "$desc: s value");
753 is($res, 'xyz', "$desc: res value");
754 is($one, 'abcd', "$desc: \$1 value");
755
20be6587
DM
756 $desc = "use re 'taint': substitution /e with string tainted";
757
758 $s = 'abcd' . $TAINT;
759 $one = '';
760 $res = $s =~ s{(.+)}{
761 $one = $one . "x"; # make sure code not tainted
f37ea7f0 762 isnt_tainted($one, "$desc: code not tainted within /e");
20be6587 763 $one = $1;
f37ea7f0 764 is_tainted($one, "$desc: $1 tainted within /e");
20be6587
DM
765 "xyz";
766 }e;
767 $one = $1;
f37ea7f0
NC
768 is_tainted($s, "$desc: s tainted");
769 isnt_tainted($res, "$desc: res not tainted");
770 is_tainted($one, "$desc: \$1 tainted");
20be6587
DM
771 is($s, 'xyz', "$desc: s value");
772 is($res, 1, "$desc: res value");
773 is($one, 'abcd', "$desc: \$1 value");
774
c769ddc7
DM
775 $desc = "use re 'taint': substitution with pattern tainted";
776
777 $s = 'abcd';
778 $res = $s =~ s/$TAINT(.+)/xyz/;
779 $one = $1;
f37ea7f0
NC
780 is_tainted($s, "$desc: s tainted");
781 isnt_tainted($res, "$desc: res not tainted");
782 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
783 is($s, 'xyz', "$desc: s value");
784 is($res, 1, "$desc: res value");
785 is($one, 'abcd', "$desc: \$1 value");
786
787 $desc = "use re 'taint': substitution /g with pattern tainted";
788
789 $s = 'abcd';
790 $res = $s =~ s/$TAINT(.)/x/g;
791 $one = $1;
f37ea7f0
NC
792 is_tainted($s, "$desc: s tainted");
793 is_tainted($res, "$desc: res tainted");
794 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
795 is($s, 'xxxx', "$desc: s value");
796 is($res, 4, "$desc: res value");
797 is($one, 'd', "$desc: \$1 value");
798
20be6587
DM
799 $desc = "use re 'taint': substitution /ge with pattern tainted";
800
801 $s = 'abc';
802 {
803 my $i = 0;
804 my $j;
805 $res = $s =~ s{(.)$TAINT}{
806 $j = $i; # make sure code not tainted
807 $one = $1;
f37ea7f0 808 isnt_tainted($j, "$desc: code not tainted within /e");
20be6587
DM
809 $i++;
810 if ($i == 1) {
f37ea7f0 811 isnt_tainted($s, "$desc: s not tainted loop 1");
20be6587
DM
812 }
813 else {
f37ea7f0 814 is_tainted($s, "$desc: s tainted loop $i");
20be6587 815 }
f37ea7f0 816 is_tainted($one, "$desc: \$1 tainted loop $i");
20be6587
DM
817 $i.$TAINT;
818 }ge;
819 $one = $1;
820 }
f37ea7f0
NC
821 is_tainted($s, "$desc: s tainted");
822 is_tainted($res, "$desc: res tainted");
823 is_tainted($one, "$desc: \$1 tainted");
20be6587
DM
824 is($s, '123', "$desc: s value");
825 is($res, 3, "$desc: res value");
826 is($one, 'c', "$desc: \$1 value");
827
828
c769ddc7
DM
829 $desc = "use re 'taint': substitution /r with pattern tainted";
830
831 $s = 'abcd';
832 $res = $s =~ s/$TAINT(.+)/xyz/r;
833 $one = $1;
f37ea7f0
NC
834 isnt_tainted($s, "$desc: s not tainted");
835 is_tainted($res, "$desc: res tainted");
836 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
837 is($s, 'abcd', "$desc: s value");
838 is($res, 'xyz', "$desc: res value");
839 is($one, 'abcd', "$desc: \$1 value");
840
841 $desc = "use re 'taint': substitution with pattern tainted via locale";
842
843 $s = 'abcd';
844 { use locale; $res = $s =~ s/(\w+)/xyz/; $one = $1; }
f37ea7f0
NC
845 is_tainted($s, "$desc: s tainted");
846 isnt_tainted($res, "$desc: res not tainted");
847 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
848 is($s, 'xyz', "$desc: s value");
849 is($res, 1, "$desc: res value");
850 is($one, 'abcd', "$desc: \$1 value");
851
852 $desc = "use re 'taint': substitution /g with pattern tainted via locale";
853
854 $s = 'abcd';
855 { use locale; $res = $s =~ s/(\w)/x/g; $one = $1; }
f37ea7f0
NC
856 is_tainted($s, "$desc: s tainted");
857 is_tainted($res, "$desc: res tainted");
858 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
859 is($s, 'xxxx', "$desc: s value");
860 is($res, 4, "$desc: res value");
861 is($one, 'd', "$desc: \$1 value");
862
863 $desc = "use re 'taint': substitution /r with pattern tainted via locale";
864
865 $s = 'abcd';
866 { use locale; $res = $s =~ s/(\w+)/xyz/r; $one = $1; }
f37ea7f0
NC
867 isnt_tainted($s, "$desc: s not tainted");
868 is_tainted($res, "$desc: res tainted");
869 is_tainted($one, "$desc: \$1 tainted");
c769ddc7
DM
870 is($s, 'abcd', "$desc: s value");
871 is($res, 'xyz', "$desc: res value");
872 is($one, 'abcd', "$desc: \$1 value");
873
874 $desc = "use re 'taint': substitution with replacement tainted";
875
876 $s = 'abcd';
877 $res = $s =~ s/(.+)/xyz$TAINT/;
878 $one = $1;
f37ea7f0
NC
879 is_tainted($s, "$desc: s tainted");
880 isnt_tainted($res, "$desc: res not tainted");
881 isnt_tainted($one, "$desc: \$1 not tainted");
c769ddc7
DM
882 is($s, 'xyz', "$desc: s value");
883 is($res, 1, "$desc: res value");
884 is($one, 'abcd', "$desc: \$1 value");
885
886 $desc = "use re 'taint': substitution /g with replacement tainted";
887
888 $s = 'abcd';
889 $res = $s =~ s/(.)/x$TAINT/g;
890 $one = $1;
f37ea7f0
NC
891 is_tainted($s, "$desc: s tainted");
892 isnt_tainted($res, "$desc: res not tainted");
893 isnt_tainted($one, "$desc: \$1 not tainted");
c769ddc7
DM
894 is($s, 'xxxx', "$desc: s value");
895 is($res, 4, "$desc: res value");
896 is($one, 'd', "$desc: \$1 value");
897
20be6587
DM
898 $desc = "use re 'taint': substitution /ge with replacement tainted";
899
900 $s = 'abc';
901 {
902 my $i = 0;
903 my $j;
904 $res = $s =~ s{(.)}{
905 $j = $i; # make sure code not tainted
906 $one = $1;
f37ea7f0 907 isnt_tainted($j, "$desc: code not tainted within /e");
20be6587
DM
908 $i++;
909 if ($i == 1) {
f37ea7f0 910 isnt_tainted($s, "$desc: s not tainted loop 1");
20be6587
DM
911 }
912 else {
f37ea7f0 913 is_tainted($s, "$desc: s tainted loop $i");
20be6587 914 }
f37ea7f0 915 isnt_tainted($one, "$desc: \$1 not tainted");
20be6587
DM
916 $i.$TAINT;
917 }ge;
918 $one = $1;
919 }
f37ea7f0 920 is_tainted($s, "$desc: s tainted");
52c47e16 921 isnt_tainted($res, "$desc: res tainted");
f37ea7f0 922 isnt_tainted($one, "$desc: \$1 not tainted");
20be6587
DM
923 is($s, '123', "$desc: s value");
924 is($res, 3, "$desc: res value");
925 is($one, 'c', "$desc: \$1 value");
926
c769ddc7
DM
927 $desc = "use re 'taint': substitution /r with replacement tainted";
928
929 $s = 'abcd';
930 $res = $s =~ s/(.+)/xyz$TAINT/r;
931 $one = $1;
f37ea7f0
NC
932 isnt_tainted($s, "$desc: s not tainted");
933 is_tainted($res, "$desc: res tainted");
934 isnt_tainted($one, "$desc: \$1 not tainted");
c769ddc7
DM
935 is($s, 'abcd', "$desc: s value");
936 is($res, 'xyz', "$desc: res value");
937 is($one, 'abcd', "$desc: \$1 value");
b3eb6a9b
GS
938 }
939
940 $foo = $1 if 'bar' =~ /(.+)$TAINT/;
f37ea7f0 941 is_tainted($foo);
c3197de1 942 is($foo, 'bar');
48c036b1 943
1e422769 944 my $pi = 4 * atan2(1,1) + $TAINT0;
f37ea7f0 945 is_tainted($pi);
1e422769
PP
946
947 ($pi) = $pi =~ /(\d+\.\d+)/;
f37ea7f0 948 isnt_tainted($pi);
c3197de1 949 is(sprintf("%.5f", $pi), '3.14159');
1e422769
PP
950}
951
952# How about command-line arguments? The problem is that we don't
953# always get some, so we'll run another process with some.
dc459aad 954SKIP: {
1ab9acc5 955 my $arg = tempfile();
22d7dfed
NC
956 open $fh, '>', $arg or die "Can't create $arg: $!";
957 print $fh q{
1e422769
PP
958 eval { join('', @ARGV), kill 0 };
959 exit 0 if $@ =~ /^Insecure dependency/;
960 print "# Oops: \$@ was [$@]\n";
961 exit 1;
962 };
22d7dfed 963 close $fh or die "Can't close $arg: $!";
1e422769 964 print `$Invoke_Perl "-T" $arg and some suspect arguments`;
c3197de1 965 is($?, 0, "Exited with status $?");
1e422769
PP
966 unlink $arg;
967}
968
969# Reading from a file should be tainted
970{
22d7dfed 971 ok(open my $fh, '<', $TEST) or diag("Couldn't open '$TEST': $!");
1e422769
PP
972
973 my $block;
22d7dfed
NC
974 sysread($fh, $block, 100);
975 my $line = <$fh>;
976 close $fh;
f37ea7f0
NC
977 is_tainted($block);
978 is_tainted($line);
1e422769
PP
979}
980
1e422769
PP
981# Output of commands should be tainted
982{
983 my $foo = `$echo abc`;
f37ea7f0 984 is_tainted($foo);
1e422769
PP
985}
986
987# Certain system variables should be tainted
988{
e75436bf
NC
989 is_tainted($^X);
990 is_tainted($0);
1e422769
PP
991}
992
993# Results of matching should all be untainted
994{
995 my $foo = "abcdefghi" . $TAINT;
f37ea7f0 996 is_tainted($foo);
1e422769
PP
997
998 $foo =~ /def/;
81cba34d
NC
999 isnt_tainted($`);
1000 isnt_tainted($&);
1001 isnt_tainted($');
1e422769
PP
1002
1003 $foo =~ /(...)(...)(...)/;
81cba34d
NC
1004 isnt_tainted($1);
1005 isnt_tainted($2);
1006 isnt_tainted($3);
1007 isnt_tainted($+);
1e422769
PP
1008
1009 my @bar = $foo =~ /(...)(...)(...)/;
81cba34d 1010 isnt_tainted($_) foreach @bar;
1e422769 1011
f37ea7f0 1012 is_tainted($foo); # $foo should still be tainted!
c3197de1 1013 is($foo, "abcdefghi");
1e422769
PP
1014}
1015
1016# Operations which affect files can't use tainted data.
1017{
8184526b 1018 violates_taint(sub { chmod 0, $TAINT }, 'chmod');
1e422769 1019
e2b4a08c
NC
1020 SKIP: {
1021 skip "truncate() is not available", 2 unless $Config{d_truncate};
1022
8184526b 1023 violates_taint(sub { truncate 'NoSuChFiLe', $TAINT0 }, 'truncate');
e2b4a08c 1024 }
1e422769 1025
8184526b
NC
1026 violates_taint(sub { rename '', $TAINT }, 'rename');
1027 violates_taint(sub { unlink $TAINT }, 'unlink');
1028 violates_taint(sub { utime $TAINT }, 'utime');
48c036b1 1029
09f04786
MS
1030 SKIP: {
1031 skip "chown() is not available", 2 unless $Config{d_chown};
1e422769 1032
8184526b 1033 violates_taint(sub { chown -1, -1, $TAINT }, 'chown');
1e422769
PP
1034 }
1035
09f04786
MS
1036 SKIP: {
1037 skip "link() is not available", 2 unless $Config{d_link};
1038
8184526b 1039violates_taint(sub { link $TAINT, '' }, 'link');
1e422769 1040 }
09f04786
MS
1041
1042 SKIP: {
1043 skip "symlink() is not available", 2 unless $Config{d_symlink};
1044
8184526b 1045 violates_taint(sub { symlink $TAINT, '' }, 'symlink');
1e422769
PP
1046 }
1047}
1048
1049# Operations which affect directories can't use tainted data.
1050{
8184526b
NC
1051 violates_taint(sub { mkdir "foo".$TAINT, 0755 . $TAINT0 }, 'mkdir');
1052 violates_taint(sub { rmdir $TAINT }, 'rmdir');
1053 violates_taint(sub { chdir "foo".$TAINT }, 'chdir');
48c036b1 1054
09f04786
MS
1055 SKIP: {
1056 skip "chroot() is not available", 2 unless $Config{d_chroot};
1057
8184526b 1058 violates_taint(sub { chroot $TAINT }, 'chroot');
1e422769
PP
1059 }
1060}
1061
1062# Some operations using files can't use tainted data.
1063{
1064 my $foo = "imaginary library" . $TAINT;
8184526b 1065 violates_taint(sub { require $foo }, 'require');
1e422769 1066
1c25d394 1067 my $filename = tempfile(); # NB: $filename isn't tainted!
1e422769
PP
1068 $foo = $filename . $TAINT;
1069 unlink $filename; # in any case
1070
c3197de1 1071 is(eval { open FOO, $foo }, undef, 'open for read');
8184526b 1072 is($@, ''); # NB: This should be allowed
22d7dfed
NC
1073 is(eval { open my $fh, , '<', $foo }, undef, 'open for read');
1074 is($@, ''); # NB: This should be allowed
9d116dd7
JH
1075
1076 # Try first new style but allow also old style.
327ccce1
YST
1077 # We do not want the whole taint.t to fail
1078 # just because Errno possibly failing.
c3197de1 1079 ok(eval('$!{ENOENT}') ||
61ae2fbf 1080 $! == 2 || # File not found
c3197de1 1081 ($Is_Dos && $! == 22));
1e422769 1082
ef5cbc63 1083 violates_taint(sub { open FOO, "> $foo" }, 'open', 'open for write');
22d7dfed 1084 violates_taint(sub { open my $fh, '>', $foo }, 'open', 'open for write');
1e422769
PP
1085}
1086
1087# Commands to the system can't use tainted data
1088{
1089 my $foo = $TAINT;
1090
09f04786 1091 SKIP: {
22d7dfed 1092 skip "open('|') is not available", 8 if $^O eq 'amigaos';
09f04786 1093
22d7dfed
NC
1094 violates_taint(sub { open FOO, "| x$foo" }, 'piped open', 'popen to');
1095 violates_taint(sub { open FOO, "x$foo |" }, 'piped open', 'popen from');
1096 violates_taint(sub { open my $fh, '|-', "x$foo" }, 'piped open', 'popen to');
1097 violates_taint(sub { open my $fh, '-|', "x$foo" }, 'piped open', 'popen from');
48c036b1 1098 }
1e422769 1099
8184526b
NC
1100 violates_taint(sub { exec $TAINT }, 'exec');
1101 violates_taint(sub { system $TAINT }, 'system');
48c036b1 1102
1e422769
PP
1103 $foo = "*";
1104 taint_these $foo;
1105
ef5cbc63 1106 violates_taint(sub { `$echo 1$foo` }, '``', 'backticks');
1e422769 1107
09f04786
MS
1108 SKIP: {
1109 # wildcard expansion doesn't invoke shell on VMS, so is safe
1110 skip "This is not VMS", 2 unless $Is_VMS;
1111
c3197de1
NC
1112 isnt(join('', eval { glob $foo } ), '', 'globbing');
1113 is($@, '');
1e422769
PP
1114 }
1115}
1116
1117# Operations which affect processes can't use tainted data.
1118{
8184526b 1119 violates_taint(sub { kill 0, $TAINT }, 'kill');
1e422769 1120
09f04786
MS
1121 SKIP: {
1122 skip "setpgrp() is not available", 2 unless $Config{d_setpgrp};
1e422769 1123
8184526b 1124 violates_taint(sub { setpgrp 0, $TAINT0 }, 'setpgrp');
1e422769 1125 }
09f04786
MS
1126
1127 SKIP: {
1128 skip "setpriority() is not available", 2 unless $Config{d_setprior};
1129
8184526b 1130 violates_taint(sub { setpriority 0, $TAINT0, $TAINT0 }, 'setpriority');
1e422769
PP
1131 }
1132}
1133
1134# Some miscellaneous operations can't use tainted data.
1135{
09f04786
MS
1136 SKIP: {
1137 skip "syscall() is not available", 2 unless $Config{d_syscall};
1138
8184526b 1139 violates_taint(sub { syscall $TAINT }, 'syscall');
1e422769
PP
1140 }
1141
1142 {
1143 my $foo = "x" x 979;
1144 taint_these $foo;
1145 local *FOO;
1c25d394 1146 my $temp = tempfile();
c3197de1 1147 ok(open FOO, "> $temp") or diag("Couldn't open $temp for write: $!");
8184526b 1148 violates_taint(sub { ioctl FOO, $TAINT0, $foo }, 'ioctl');
1e422769 1149
22d7dfed
NC
1150 my $temp2 = tempfile();
1151 ok(open my $fh, '>', $temp2) or diag("Couldn't open $temp2 for write: $!");
1152 violates_taint(sub { ioctl $fh, $TAINT0, $foo }, 'ioctl');
1153
09f04786 1154 SKIP: {
22d7dfed 1155 skip "fcntl() is not available", 4 unless $Config{d_fcntl};
09f04786 1156
8184526b 1157 violates_taint(sub { fcntl FOO, $TAINT0, $foo }, 'fcntl');
22d7dfed 1158 violates_taint(sub { fcntl $fh, $TAINT0, $foo }, 'fcntl');
1e422769
PP
1159 }
1160
1161 close FOO;
1162 }
1163}
1164
9607fc9c 1165# Some tests involving references
1e422769
PP
1166{
1167 my $foo = 'abc' . $TAINT;
1168 my $fooref = \$foo;
f37ea7f0
NC
1169 isnt_tainted($fooref);
1170 is_tainted($$fooref);
1171 is_tainted($foo);
1e422769 1172}
54310121
PP
1173
1174# Some tests involving assignment
1175{
1176 my $foo = $TAINT0;
1177 my $bar = $foo;
e75436bf
NC
1178 is_tainted($foo);
1179 is_tainted($bar);
f37ea7f0
NC
1180 is_tainted($foo = $bar);
1181 is_tainted($bar = $bar);
1182 is_tainted($bar += $bar);
1183 is_tainted($bar -= $bar);
1184 is_tainted($bar *= $bar);
1185 is_tainted($bar++);
1186 is_tainted($bar /= $bar);
1187 is_tainted($bar += 0);
1188 is_tainted($bar -= 2);
1189 is_tainted($bar *= -1);
1190 is_tainted($bar /= 1);
1191 is_tainted($bar--);
c3197de1 1192 is($bar, 0);
54310121 1193}
a1f49e72
CS
1194
1195# Test assignment and return of lists
1196{
1197 my @foo = ("A", "tainted" . $TAINT, "B");
f37ea7f0
NC
1198 isnt_tainted($foo[0]);
1199 is_tainted( $foo[1]);
1200 isnt_tainted($foo[2]);
a1f49e72 1201 my @bar = @foo;
f37ea7f0
NC
1202 isnt_tainted($bar[0]);
1203 is_tainted( $bar[1]);
1204 isnt_tainted($bar[2]);
a1f49e72 1205 my @baz = eval { "A", "tainted" . $TAINT, "B" };
f37ea7f0
NC
1206 isnt_tainted($baz[0]);
1207 is_tainted( $baz[1]);
1208 isnt_tainted($baz[2]);
a1f49e72 1209 my @plugh = eval q[ "A", "tainted" . $TAINT, "B" ];
f37ea7f0
NC
1210 isnt_tainted($plugh[0]);
1211 is_tainted( $plugh[1]);
1212 isnt_tainted($plugh[2]);
a1f49e72 1213 my $nautilus = sub { "A", "tainted" . $TAINT, "B" };
f37ea7f0
NC
1214 isnt_tainted(((&$nautilus)[0]));
1215 is_tainted( ((&$nautilus)[1]));
1216 isnt_tainted(((&$nautilus)[2]));
a1f49e72 1217 my @xyzzy = &$nautilus;
f37ea7f0
NC
1218 isnt_tainted($xyzzy[0]);
1219 is_tainted( $xyzzy[1]);
1220 isnt_tainted($xyzzy[2]);
a1f49e72 1221 my $red_october = sub { return "A", "tainted" . $TAINT, "B" };
f37ea7f0
NC
1222 isnt_tainted(((&$red_october)[0]));
1223 is_tainted( ((&$red_october)[1]));
1224 isnt_tainted(((&$red_october)[2]));
a1f49e72 1225 my @corge = &$red_october;
f37ea7f0
NC
1226 isnt_tainted($corge[0]);
1227 is_tainted( $corge[1]);
1228 isnt_tainted($corge[2]);
a1f49e72 1229}
fb73857a
PP
1230
1231# Test for system/library calls returning string data of dubious origin.
1232{
1233 # No reliable %Config check for getpw*
09f04786 1234 SKIP: {
f37ea7f0 1235 skip "getpwent() is not available", 9 unless
09f04786
MS
1236 eval { setpwent(); getpwent() };
1237
fb73857a
PP
1238 setpwent();
1239 my @getpwent = getpwent();
1240 die "getpwent: $!\n" unless (@getpwent);
f37ea7f0
NC
1241 isnt_tainted($getpwent[0]);
1242 is_tainted($getpwent[1]);
1243 isnt_tainted($getpwent[2]);
1244 isnt_tainted($getpwent[3]);
1245 isnt_tainted($getpwent[4]);
1246 isnt_tainted($getpwent[5]);
1247 is_tainted($getpwent[6], 'ge?cos');
1248 isnt_tainted($getpwent[7]);
1249 is_tainted($getpwent[8], 'shell');
fb73857a 1250 endpwent();
fb73857a
PP
1251 }
1252
09f04786
MS
1253 SKIP: {
1254 # pretty hard to imagine not
1255 skip "readdir() is not available", 1 unless $Config{d_readdir};
1256
22d7dfed
NC
1257 opendir my $dh, "op" or die "opendir: $!\n";
1258 my $readdir = readdir $dh;
f37ea7f0 1259 is_tainted($readdir);
22d7dfed 1260 closedir $dh;
fb73857a
PP
1261 }
1262
09f04786
MS
1263 SKIP: {
1264 skip "readlink() or symlink() is not available" unless
1265 $Config{d_readlink} && $Config{d_symlink};
1266
fb73857a
PP
1267 my $symlink = "sl$$";
1268 unlink($symlink);
dc459aad
JH
1269 my $sl = "/something/naughty";
1270 # it has to be a real path on Mac OS
dc459aad 1271 symlink($sl, $symlink) or die "symlink: $!\n";
fb73857a 1272 my $readlink = readlink($symlink);
f37ea7f0 1273 is_tainted($readlink);
fb73857a 1274 unlink($symlink);
fb73857a
PP
1275 }
1276}
1277
1278# test bitwise ops (regression bug)
1279{
1280 my $why = "y";
1281 my $j = "x" | $why;
f37ea7f0 1282 isnt_tainted($j);
fb73857a
PP
1283 $why = $TAINT."y";
1284 $j = "x" | $why;
f37ea7f0 1285 is_tainted( $j);
fb73857a
PP
1286}
1287
48c036b1
GS
1288# test target of substitution (regression bug)
1289{
1290 my $why = $TAINT."y";
1291 $why =~ s/y/z/;
f37ea7f0 1292 is_tainted( $why);
48c036b1
GS
1293
1294 my $z = "[z]";
1295 $why =~ s/$z/zee/;
f37ea7f0 1296 is_tainted( $why);
48c036b1
GS
1297
1298 $why =~ s/e/'-'.$$/ge;
f37ea7f0 1299 is_tainted( $why);
48c036b1 1300}
d929ce6f 1301
09f04786
MS
1302
1303SKIP: {
1304 skip "no IPC::SysV", 2 unless $ipcsysv;
1305
1306 # test shmread
1307 SKIP: {
1308 skip "shm*() not available", 1 unless $Config{d_shm};
1309
1310 no strict 'subs';
1311 my $sent = "foobar";
1312 my $rcvd;
1313 my $size = 2000;
1314 my $id = shmget(IPC_PRIVATE, $size, S_IRWXU);
1315
1316 if (defined $id) {
1317 if (shmwrite($id, $sent, 0, 60)) {
1318 if (shmread($id, $rcvd, 0, 60)) {
1319 substr($rcvd, index($rcvd, "\0")) = '';
1320 } else {
1321 warn "# shmread failed: $!\n";
1322 }
1323 } else {
1324 warn "# shmwrite failed: $!\n";
1325 }
1326 shmctl($id, IPC_RMID, 0) or warn "# shmctl failed: $!\n";
1327 } else {
1328 warn "# shmget failed: $!\n";
1329 }
1330
1331 skip "SysV shared memory operation failed", 1 unless
1332 $rcvd eq $sent;
1333
f37ea7f0 1334 is_tainted($rcvd);
c9f931b8 1335 }
c2e66d9e 1336
d929ce6f 1337
09f04786
MS
1338 # test msgrcv
1339 SKIP: {
1340 skip "msg*() not available", 1 unless $Config{d_msg};
41d6edb2 1341
b9d1c439 1342 no strict 'subs';
41d6edb2
JH
1343 my $id = msgget(IPC_PRIVATE, IPC_CREAT | S_IRWXU);
1344
1345 my $sent = "message";
1346 my $type_sent = 1234;
1347 my $rcvd;
1348 my $type_rcvd;
1349
1350 if (defined $id) {
ddc3217d
JH
1351 if (msgsnd($id, pack("l! a*", $type_sent, $sent), IPC_NOWAIT)) {
1352 if (msgrcv($id, $rcvd, 60, 0, IPC_NOWAIT)) {
41d6edb2
JH
1353 ($type_rcvd, $rcvd) = unpack("l! a*", $rcvd);
1354 } else {
ddc3217d 1355 warn "# msgrcv failed: $!\n";
41d6edb2
JH
1356 }
1357 } else {
ddc3217d 1358 warn "# msgsnd failed: $!\n";
41d6edb2 1359 }
c2e66d9e 1360 msgctl($id, IPC_RMID, 0) or warn "# msgctl failed: $!\n";
41d6edb2
JH
1361 } else {
1362 warn "# msgget failed\n";
1363 }
1364
09f04786
MS
1365 SKIP: {
1366 skip "SysV message queue operation failed", 1
1367 unless $rcvd eq $sent && $type_sent == $type_rcvd;
1368
f37ea7f0 1369 is_tainted($rcvd);
41d6edb2 1370 }
41d6edb2
JH
1371 }
1372}
1373
3887d568
AP
1374{
1375 # bug id 20001004.006
1376
22d7dfed 1377 open my $fh, '<', $TEST or warn "$0: cannot read $TEST: $!" ;
3887d568 1378 local $/;
22d7dfed
NC
1379 my $a = <$fh>;
1380 my $b = <$fh>;
09f04786 1381
f37ea7f0
NC
1382 is_tainted($a);
1383 is_tainted($b);
1384 is($b, undef);
3887d568 1385}
27c9684d
AP
1386
1387{
1388 # bug id 20001004.007
1389
22d7dfed
NC
1390 open my $fh, '<', $TEST or warn "$0: cannot read $TEST: $!" ;
1391 my $a = <$fh>;
27c9684d
AP
1392
1393 my $c = { a => 42,
1394 b => $a };
09f04786 1395
f37ea7f0
NC
1396 isnt_tainted($c->{a});
1397 is_tainted($c->{b});
09f04786 1398
27c9684d
AP
1399
1400 my $d = { a => $a,
1401 b => 42 };
f37ea7f0
NC
1402 is_tainted($d->{a});
1403 isnt_tainted($d->{b});
09f04786 1404
27c9684d
AP
1405
1406 my $e = { a => 42,
1407 b => { c => $a, d => 42 } };
f37ea7f0
NC
1408 isnt_tainted($e->{a});
1409 isnt_tainted($e->{b});
1410 is_tainted($e->{b}->{c});
1411 isnt_tainted($e->{b}->{d});
27c9684d
AP
1412}
1413
b94c04ac
JH
1414{
1415 # bug id 20010519.003
1416
248c32c0
JH
1417 BEGIN {
1418 use vars qw($has_fcntl);
1419 eval { require Fcntl; import Fcntl; };
1420 unless ($@) {
1421 $has_fcntl = 1;
1422 }
1423 }
b94c04ac 1424
09f04786
MS
1425 SKIP: {
1426 skip "no Fcntl", 18 unless $has_fcntl;
1427
281a340f
NC
1428 my $foo = tempfile();
1429 my $evil = $foo . $TAINT;
248c32c0 1430
4e74b85b
NC
1431 is(eval { sysopen(my $ro, $evil, &O_RDONLY) }, undef);
1432 is($@, '');
1433
1434 violates_taint(sub { sysopen(my $wo, $evil, &O_WRONLY) }, 'sysopen');
1435 violates_taint(sub { sysopen(my $rw, $evil, &O_RDWR) }, 'sysopen');
1436 violates_taint(sub { sysopen(my $ap, $evil, &O_APPEND) }, 'sysopen');
1437 violates_taint(sub { sysopen(my $cr, $evil, &O_CREAT) }, 'sysopen');
1438 violates_taint(sub { sysopen(my $tr, $evil, &O_TRUNC) }, 'sysopen');
1439
1440 is(eval { sysopen(my $ro, $foo, &O_RDONLY | $TAINT0) }, undef);
1441 is($@, '');
1442
1443 violates_taint(sub { sysopen(my $wo, $foo, &O_WRONLY | $TAINT0) }, 'sysopen');
1444 violates_taint(sub { sysopen(my $rw, $foo, &O_RDWR | $TAINT0) }, 'sysopen');
1445 violates_taint(sub { sysopen(my $ap, $foo, &O_APPEND | $TAINT0) }, 'sysopen');
1446 violates_taint(sub { sysopen(my $cr, $foo, &O_CREAT | $TAINT0) }, 'sysopen');
1447 violates_taint(sub { sysopen(my $tr, $foo, &O_TRUNC | $TAINT0) }, 'sysopen');
1448 is(eval { sysopen(my $ro, $foo, &O_RDONLY, $TAINT0) }, undef);
1449 is($@, '');
1450
1451 violates_taint(sub { sysopen(my $wo, $foo, &O_WRONLY, $TAINT0) }, 'sysopen');
1452 violates_taint(sub { sysopen(my $rw, $foo, &O_RDWR, $TAINT0) }, 'sysopen');
1453 violates_taint(sub { sysopen(my $ap, $foo, &O_APPEND, $TAINT0) }, 'sysopen');
1454 violates_taint(sub { sysopen(my $cr, $foo, &O_CREAT, $TAINT0) }, 'sysopen');
1455 violates_taint(sub { sysopen(my $tr, $foo, &O_TRUNC, $TAINT0) }, 'sysopen');
248c32c0 1456 }
b94c04ac
JH
1457}
1458
65811bc3
JH
1459{
1460 # bug 20010526.004
1461
1462 use warnings;
1463
09f04786 1464 my $saw_warning = 0;
c3197de1 1465 local $SIG{__WARN__} = sub { ++$saw_warning };
65811bc3
JH
1466
1467 sub fmi {
1468 my $divnum = shift()/1;
1469 sprintf("%1.1f\n", $divnum);
1470 }
1471
1472 fmi(21 . $TAINT);
1473 fmi(37);
1474 fmi(248);
1475
c3197de1 1476 is($saw_warning, 0);
65811bc3
JH
1477}
1478
9e1b5a4e
A
1479
1480{
1481 # Bug ID 20010730.010
1482
1483 my $i = 0;
1484
1485 sub Tie::TIESCALAR {
1486 my $class = shift;
1487 my $arg = shift;
1488
1489 bless \$arg => $class;
1490 }
1491
1492 sub Tie::FETCH {
1493 $i ++;
1494 ${$_ [0]}
1495 }
1496
1497
1498 package main;
1499
1500 my $bar = "The Big Bright Green Pleasure Machine";
1501 taint_these $bar;
1502 tie my ($foo), Tie => $bar;
1503
1504 my $baz = $foo;
1505
09f04786 1506 ok $i == 1;
9e1b5a4e
A
1507}
1508
8852b6d2
JH
1509{
1510 # Check that all environment variables are tainted.
1511 my @untainted;
1512 while (my ($k, $v) = each %ENV) {
1513 if (!tainted($v) &&
eb25aaf6
HS
1514 # These we have explicitly untainted or set earlier.
1515 $k !~ /^(BASH_ENV|CDPATH|ENV|IFS|PATH|PERL_CORE|TEMP|TERM|TMP)$/) {
8852b6d2
JH
1516 push @untainted, "# '$k' = '$v'\n";
1517 }
1518 }
c3197de1 1519 is("@untainted", "");
8852b6d2 1520}
9e1b5a4e
A
1521
1522
433f4d03 1523is(${^TAINT}, 1, '$^TAINT is on');
7c36658b
MS
1524
1525eval { ${^TAINT} = 0 };
433f4d03
NC
1526is(${^TAINT}, 1, '$^TAINT is not assignable');
1527like($@, qr/^Modification of a read-only value attempted/,
1528 'Assigning to ${^TAINT} fails');
7c36658b 1529
e08e52cf
AMS
1530{
1531 # bug 20011111.105
1532
1533 my $re1 = qr/x$TAINT/;
f37ea7f0 1534 is_tainted($re1);
e08e52cf
AMS
1535
1536 my $re2 = qr/^$re1\z/;
f37ea7f0 1537 is_tainted($re2);
e08e52cf
AMS
1538
1539 my $re3 = "$re2";
f37ea7f0 1540 is_tainted($re3);
e08e52cf 1541}
52a55424 1542
09f04786
MS
1543SKIP: {
1544 skip "system {} has different semantics on Win32", 1 if $Is_MSWin32;
1545
52a55424
RG
1546 # bug 20010221.005
1547 local $ENV{PATH} .= $TAINT;
1548 eval { system { "echo" } "/arg0", "arg1" };
c3197de1 1549 like($@, qr/^Insecure \$ENV/);
52a55424 1550}
09f04786
MS
1551
1552TODO: {
1553 todo_skip 'tainted %ENV warning occludes tainted arguments warning', 22
1554 if $Is_VMS;
1555
1556 # bug 20020208.005 plus some single arg exec/system extras
8184526b
NC
1557 violates_taint(sub { exec $TAINT, $TAINT }, 'exec');
1558 violates_taint(sub { exec $TAINT $TAINT }, 'exec');
1559 violates_taint(sub { exec $TAINT $TAINT, $TAINT }, 'exec');
1560 violates_taint(sub { exec $TAINT 'notaint' }, 'exec');
1561 violates_taint(sub { exec {'notaint'} $TAINT }, 'exec');
1562
1563 violates_taint(sub { system $TAINT, $TAINT }, 'system');
1564 violates_taint(sub { system $TAINT $TAINT }, 'system');
1565 violates_taint(sub { system $TAINT $TAINT, $TAINT }, 'system');
1566 violates_taint(sub { system $TAINT 'notaint' }, 'system');
1567 violates_taint(sub { system {'notaint'} $TAINT }, 'system');
09f04786
MS
1568
1569 eval {
1570 no warnings;
1571 system("lskdfj does not exist","with","args");
1572 };
c3197de1 1573 is($@, "");
09f04786 1574
7b903762
RGS
1575 eval {
1576 no warnings;
1577 exec("lskdfj does not exist","with","args");
1578 };
c3197de1 1579 is($@, "");
6c8794e1
JH
1580
1581 # If you add tests here update also the above skip block for VMS.
bbd7eb8a 1582}
a8c7c11a
HS
1583
1584{
1585 # [ID 20020704.001] taint propagation failure
1586 use re 'taint';
1587 $TAINT =~ /(.*)/;
f37ea7f0 1588 is_tainted(my $foo = $1);
a8c7c11a 1589}
7b756e0a
RGS
1590
1591{
c038024b
RGS
1592 # [perl #24291] this used to dump core
1593 our %nonmagicalenv = ( PATH => "util" );
7b756e0a
RGS
1594 local *ENV = \%nonmagicalenv;
1595 eval { system("lskdfj"); };
c3197de1 1596 like($@, qr/^%ENV is aliased to another variable while running with -T switch/);
c038024b 1597 local *ENV = *nonmagicalenv;
7b756e0a 1598 eval { system("lskdfj"); };
c3197de1 1599 like($@, qr/^%ENV is aliased to %nonmagicalenv while running with -T switch/);
7b756e0a 1600}
0b4182de
RD
1601{
1602 # [perl #24248]
1603 $TAINT =~ /(.*)/;
f37ea7f0 1604 isnt_tainted($1);
0b4182de 1605 my $notaint = $1;
f37ea7f0 1606 isnt_tainted($notaint);
0b4182de
RD
1607
1608 my $l;
1609 $notaint =~ /($notaint)/;
1610 $l = $1;
f37ea7f0
NC
1611 isnt_tainted($1);
1612 isnt_tainted($l);
0b4182de
RD
1613 $notaint =~ /($TAINT)/;
1614 $l = $1;
f37ea7f0
NC
1615 is_tainted($1);
1616 is_tainted($l);
0b4182de
RD
1617
1618 $TAINT =~ /($notaint)/;
1619 $l = $1;
f37ea7f0
NC
1620 isnt_tainted($1);
1621 isnt_tainted($l);
0b4182de
RD
1622 $TAINT =~ /($TAINT)/;
1623 $l = $1;
f37ea7f0
NC
1624 is_tainted($1);
1625 is_tainted($l);
0b4182de
RD
1626
1627 my $r;
1628 ($r = $TAINT) =~ /($notaint)/;
f37ea7f0 1629 isnt_tainted($1);
0b4182de 1630 ($r = $TAINT) =~ /($TAINT)/;
f37ea7f0 1631 is_tainted($1);
3511154c 1632
7fb31b92
DM
1633 {
1634 use re 'eval'; # this shouldn't make any difference
1635 ($r = $TAINT) =~ /($notaint)/;
1636 isnt_tainted($1);
1637 ($r = $TAINT) =~ /($TAINT)/;
1638 is_tainted($1);
1639 }
1640
3511154c
DM
1641 # [perl #24674]
1642 # accessing $^O shoudn't taint it as a side-effect;
1643 # assigning tainted data to it is now an error
1644
f37ea7f0 1645 isnt_tainted($^O);
3511154c 1646 if (!$^X) { } elsif ($^O eq 'bar') { }
f37ea7f0 1647 isnt_tainted($^O);
4b24804c 1648 local $^O; # We're going to clobber something test infrastructure depends on.
3511154c 1649 eval '$^O = $^X';
c3197de1 1650 like($@, qr/Insecure dependency in/);
0b4182de 1651}
23634c10
AL
1652
1653EFFECTIVELY_CONSTANTS: {
1654 my $tainted_number = 12 + $TAINT0;
f37ea7f0 1655 is_tainted( $tainted_number );
23634c10
AL
1656
1657 # Even though it's always 0, it's still tainted
1658 my $tainted_product = $tainted_number * 0;
f37ea7f0 1659 is_tainted( $tainted_product );
c3197de1 1660 is($tainted_product, 0);
23634c10
AL
1661}
1662
1663TERNARY_CONDITIONALS: {
1664 my $tainted_true = $TAINT . "blah blah blah";
1665 my $tainted_false = $TAINT0;
f37ea7f0
NC
1666 is_tainted( $tainted_true );
1667 is_tainted( $tainted_false );
23634c10
AL
1668
1669 my $result = $tainted_true ? "True" : "False";
c3197de1 1670 is($result, "True");
f37ea7f0 1671 isnt_tainted( $result );
23634c10
AL
1672
1673 $result = $tainted_false ? "True" : "False";
c3197de1 1674 is($result, "False");
f37ea7f0 1675 isnt_tainted( $result );
23634c10
AL
1676
1677 my $untainted_whatever = "The Fabulous Johnny Cash";
1678 my $tainted_whatever = "Soft Cell" . $TAINT;
1679
1680 $result = $tainted_true ? $tainted_whatever : $untainted_whatever;
c3197de1 1681 is($result, "Soft Cell");
f37ea7f0 1682 is_tainted( $result );
23634c10
AL
1683
1684 $result = $tainted_false ? $tainted_whatever : $untainted_whatever;
c3197de1 1685 is($result, "The Fabulous Johnny Cash");
f37ea7f0 1686 isnt_tainted( $result );
23634c10 1687}
65814f21
MS
1688
1689{
1690 # rt.perl.org 5900 $1 remains tainted if...
1691 # 1) The regular expression contains a scalar variable AND
1692 # 2) The regular expression appears in an elsif clause
1693
1694 my $foo = "abcdefghi" . $TAINT;
1695
1696 my $valid_chars = 'a-z';
1697 if ( $foo eq '' ) {
1698 }
1699 elsif ( $foo =~ /([$valid_chars]+)/o ) {
81cba34d
NC
1700 isnt_tainted($1);
1701 isnt($1, undef);
65814f21
MS
1702 }
1703
1704 if ( $foo eq '' ) {
1705 }
1706 elsif ( my @bar = $foo =~ /([$valid_chars]+)/o ) {
81cba34d
NC
1707 isnt_tainted($bar[0]);
1708 is(scalar @bar, 1);
65814f21
MS
1709 }
1710}
0a9c116b
DM
1711
1712# at scope exit, a restored localised value should have its old
1713# taint status, not the taint status of the current statement
1714
1715{
1716 our $x99 = $^X;
f37ea7f0 1717 is_tainted($x99);
0a9c116b
DM
1718
1719 $x99 = '';
f37ea7f0 1720 isnt_tainted($x99);
0a9c116b
DM
1721
1722 my $c = do { local $x99; $^X };
f37ea7f0 1723 isnt_tainted($x99);
0a9c116b
DM
1724}
1725{
1726 our $x99 = $^X;
f37ea7f0 1727 is_tainted($x99);
0a9c116b
DM
1728
1729 my $c = do { local $x99; '' };
f37ea7f0 1730 is_tainted($x99);
0a9c116b
DM
1731}
1732
27cc343c
DM
1733# an mg_get of a tainted value during localization shouldn't taint the
1734# statement
1735
1736{
1737 eval { local $0, eval '1' };
c3197de1 1738 is($@, '');
27cc343c 1739}
e26a4975
DM
1740
1741# [perl #8262] //g loops infinitely on tainted data
1742
1743{
1744 my @a;
fd69380d
DM
1745 $a[0] = $^X . '-';
1746 $a[0]=~ m/(.)/g;
1747 cmp_ok pos($a[0]), '>', 0, "infinite m//g on arrays (aelemfast)";
1748
1749 my $i = 1;
1750 $a[$i] = $^X . '-';
1751 $a[$i]=~ m/(.)/g;
1752 cmp_ok pos($a[$i]), '>', 0, "infinite m//g on arrays (aelem)";
1753
1754 my %h;
1755 $h{a} = $^X . '-';
1756 $h{a}=~ m/(.)/g;
1757 cmp_ok pos($h{a}), '>', 0, "infinite m//g on hashes (helem)";
e26a4975 1758}
0aa395f8
NC
1759
1760SKIP:
1761{
1762 my $got_dualvar;
1763 eval 'use Scalar::Util "dualvar"; $got_dualvar++';
1764 skip "No Scalar::Util::dualvar" unless $got_dualvar;
1765 my $a = Scalar::Util::dualvar(3, $^X);
1766 my $b = $a + 5;
1767 is ($b, 8, "Arithmetic on tainted dualvars works");
1768}
f27977c3
MH
1769
1770# opening '|-' should not trigger $ENV{PATH} check
1771
1772{
1773 SKIP: {
1774 skip "fork() is not available", 3 unless $Config{'d_fork'};
1fb83d06
SS
1775 skip "opening |- is not stable on threaded Open/MirBSD with taint", 3
1776 if $Config{useithreads} and $Is_OpenBSD || $Is_MirBSD;
f27977c3
MH
1777
1778 $ENV{'PATH'} = $TAINT;
1779 local $SIG{'PIPE'} = 'IGNORE';
1780 eval {
1781 my $pid = open my $pipe, '|-';
1782 if (!defined $pid) {
1783 die "open failed: $!";
1784 }
1785 if (!$pid) {
1786 kill 'KILL', $$; # child suicide
1787 }
1788 close $pipe;
1789 };
c3197de1
NC
1790 unlike($@, qr/Insecure \$ENV/, 'fork triggers %ENV check');
1791 is($@, '', 'pipe/fork/open/close failed');
f27977c3
MH
1792 eval {
1793 open my $pipe, "|$Invoke_Perl -e 1";
1794 close $pipe;
1795 };
c3197de1 1796 like($@, qr/Insecure \$ENV/, 'popen neglects %ENV check');
f27977c3
MH
1797 }
1798}
5d121f7f
RD
1799
1800{
1801 package AUTOLOAD_TAINT;
1802 sub AUTOLOAD {
1803 our $AUTOLOAD;
1804 return if $AUTOLOAD =~ /DESTROY/;
1805 if ($AUTOLOAD =~ /untainted/) {
f37ea7f0 1806 main::isnt_tainted($AUTOLOAD, '$AUTOLOAD can be untainted');
d40bf27b 1807 my $copy = $AUTOLOAD;
f37ea7f0 1808 main::isnt_tainted($copy, '$AUTOLOAD can be untainted');
5d121f7f 1809 } else {
f37ea7f0 1810 main::is_tainted($AUTOLOAD, '$AUTOLOAD can be tainted');
d40bf27b 1811 my $copy = $AUTOLOAD;
f37ea7f0 1812 main::is_tainted($copy, '$AUTOLOAD can be tainted');
5d121f7f
RD
1813 }
1814 }
1815
1816 package main;
1817 my $o = bless [], 'AUTOLOAD_TAINT';
d40bf27b 1818 $o->untainted;
5d121f7f
RD
1819 $o->$TAINT;
1820 $o->untainted;
1821}
1822
20ee07fb
RGS
1823{
1824 # tests for tainted format in s?printf
e06d98fb
DM
1825 my $fmt = $TAINT . "# %s\n";
1826 violates_taint(sub { printf($fmt, "foo") }, 'printf',
4e74b85b 1827 q/printf doesn't like tainted formats/);
e06d98fb
DM
1828 violates_taint(sub { printf($TAINT . "# %s\n", "foo") }, 'printf',
1829 q/printf doesn't like tainted format expressions/);
20ee07fb 1830 eval { printf("# %s\n", $TAINT . "foo") };
433f4d03 1831 is($@, '', q/printf accepts other tainted args/);
e06d98fb 1832 violates_taint(sub { sprintf($fmt, "foo") }, 'sprintf',
4e74b85b 1833 q/sprintf doesn't like tainted formats/);
e06d98fb
DM
1834 violates_taint(sub { sprintf($TAINT . "# %s\n", "foo") }, 'sprintf',
1835 q/sprintf doesn't like tainted format expressions/);
20ee07fb 1836 eval { sprintf("# %s\n", $TAINT . "foo") };
433f4d03 1837 is($@, '', q/sprintf accepts other tainted args/);
20ee07fb 1838}
085bde85
NC
1839
1840{
1841 # 40708
1842 my $n = 7e9;
1843 8e9 - $n;
1844
1845 my $val = $n;
1846 is ($val, '7000000000', 'Assignment to untainted variable');
1847 $val = $TAINT;
1848 $val = $n;
1849 is ($val, '7000000000', 'Assignment to tainted variable');
1850}
5e500fc8
NC
1851
1852{
5e500fc8
NC
1853 my $val = 0;
1854 my $tainted = '1' . $TAINT;
1855 eval '$val = eval $tainted;';
1856 is ($val, 0, "eval doesn't like tainted strings");
1857 like ($@, qr/^Insecure dependency in eval/);
1858
abb7fb96 1859 # Rather nice code to get a tainted undef by from Rick Delaney
22d7dfed
NC
1860 open my $fh, "test.pl" or die $!;
1861 seek $fh, 0, 2 or die $!;
1862 $tainted = <$fh>;
5e500fc8
NC
1863
1864 eval 'eval $tainted';
1865 like ($@, qr/^Insecure dependency in eval/);
1866}
beeaa6fd 1867
d3706118
NC
1868foreach my $ord (78, 163, 256) {
1869 # 47195
1870 my $line = 'A1' . $TAINT . chr $ord;
1871 chop $line;
1872 is($line, 'A1');
1873 $line =~ /(A\S*)/;
f37ea7f0 1874 isnt_tainted($1, "\\S match with chr $ord");
d3706118
NC
1875}
1876
ec93b65f
CS
1877{
1878 # 59998
1879 sub cr { my $x = crypt($_[0], $_[1]); $x }
1880 sub co { my $x = ~$_[0]; $x }
1881 my ($a, $b);
1882 $a = cr('hello', 'foo' . $TAINT);
1883 $b = cr('hello', 'foo');
f37ea7f0
NC
1884 is_tainted($a, "tainted crypt");
1885 isnt_tainted($b, "untainted crypt");
ec93b65f
CS
1886 $a = co('foo' . $TAINT);
1887 $b = co('foo');
f37ea7f0
NC
1888 is_tainted($a, "tainted complement");
1889 isnt_tainted($b, "untainted complement");
ec93b65f
CS
1890}
1891
302c0c93
NC
1892{
1893 my @data = qw(bonk zam zlonk qunckkk);
1894 # Clearly some sort of usenet bang-path
1895 my $string = $TAINT . join "!", @data;
1896
f37ea7f0 1897 is_tainted($string, "tainted data");
302c0c93
NC
1898
1899 my @got = split /!|,/, $string;
1900
1901 # each @got would be useful here, but I want the test for earlier perls
1902 for my $i (0 .. $#data) {
f37ea7f0 1903 is_tainted($got[$i], "tainted result $i");
302c0c93
NC
1904 is($got[$i], $data[$i], "correct content $i");
1905 }
1906
f37ea7f0 1907 is_tainted($string, "still tainted data");
302c0c93
NC
1908
1909 my @got = split /[!,]/, $string;
1910
1911 # each @got would be useful here, but I want the test for earlier perls
1912 for my $i (0 .. $#data) {
f37ea7f0 1913 is_tainted($got[$i], "tainted result $i");
302c0c93
NC
1914 is($got[$i], $data[$i], "correct content $i");
1915 }
1916
f37ea7f0 1917 is_tainted($string, "still tainted data");
302c0c93
NC
1918
1919 my @got = split /!/, $string;
1920
1921 # each @got would be useful here, but I want the test for earlier perls
1922 for my $i (0 .. $#data) {
f37ea7f0 1923 is_tainted($got[$i], "tainted result $i");
302c0c93
NC
1924 is($got[$i], $data[$i], "correct content $i");
1925 }
1926}
1927
3c4fb04a
RB
1928# Bug RT #52552 - broken by change at git commit id f337b08
1929{
1930 my $x = $TAINT. q{print "Hello world\n"};
1931 my $y = pack "a*", $x;
f37ea7f0 1932 is_tainted($y, "pack a* preserves tainting");
3c4fb04a
RB
1933
1934 my $z = pack "A*", q{print "Hello world\n"}.$TAINT;
f37ea7f0 1935 is_tainted($z, "pack A* preserves tainting");
3c4fb04a
RB
1936
1937 my $zz = pack "a*a*", q{print "Hello world\n"}, $TAINT;
f37ea7f0 1938 is_tainted($zz, "pack a*a* preserves tainting");
3c4fb04a
RB
1939}
1940
0097b436
DM
1941# Bug RT #61976 tainted $! would show numeric rather than string value
1942
1943{
1944 my $tainted_path = substr($^X,0,0) . "/no/such/file";
1945 my $err;
1946 # $! is used in a tainted expression, so gets tainted
1947 open my $fh, $tainted_path or $err= "$!";
1948 unlike($err, qr/^\d+$/, 'tainted $!');
1949}
1950
b112cff9
DM
1951{
1952 # #6758: tainted values become untainted in tied hashes
1953 # (also applies to other value magic such as pos)
1954
1955
1956 package P6758;
1957
1958 sub TIEHASH { bless {} }
1959 sub TIEARRAY { bless {} }
1960
1961 my $i = 0;
1962
1963 sub STORE {
f37ea7f0
NC
1964 main::is_tainted($_[1], "tied arg1 tainted");
1965 main::is_tainted($_[2], "tied arg2 tainted");
b112cff9
DM
1966 $i++;
1967 }
1968
1969 package main;
1970
1971 my ($k,$v) = qw(1111 val);
1972 taint_these($k,$v);
1973 tie my @array, 'P6758';
1974 tie my %hash , 'P6758';
1975 $array[$k] = $v;
1976 $hash{$k} = $v;
1977 ok $i == 2, "tied STORE called correct number of times";
1978}
1979
3e6bd4bf
DM
1980# Bug RT #45167 the return value of sprintf sometimes wasn't tainted
1981# when the args were tainted. This only occured on the first use of
1982# sprintf; after that, its TARG has taint magic attached, so setmagic
1983# at the end works. That's why there are multiple sprintf's below, rather
93f09d7b 1984# than just one wrapped in an inner loop. Also, any plaintext between
3e6bd4bf
DM
1985# fprmat entires would correctly cause tainting to get set. so test with
1986# "%s%s" rather than eg "%s %s".
1987
1988{
1989 for my $var1 ($TAINT, "123") {
1990 for my $var2 ($TAINT0, "456") {
8e29defb
NC
1991 is( tainted(sprintf '%s', $var1, $var2), tainted($var1),
1992 "sprintf '%s', '$var1', '$var2'" );
1993 is( tainted(sprintf ' %s', $var1, $var2), tainted($var1),
1994 "sprintf ' %s', '$var1', '$var2'" );
1995 is( tainted(sprintf '%s%s', $var1, $var2),
1996 tainted($var1) || tainted($var2),
1997 "sprintf '%s%s', '$var1', '$var2'" );
3e6bd4bf
DM
1998 }
1999 }
2000}
2001
2002
447ee134
DM
2003# Bug RT #67962: old tainted $1 gets treated as tainted
2004# in next untainted # match
2005
2006{
2007 use re 'taint';
2008 "abc".$TAINT =~ /(.*)/; # make $1 tainted
f37ea7f0 2009 is_tainted($1, '$1 should be tainted');
447ee134
DM
2010
2011 my $untainted = "abcdef";
f37ea7f0 2012 isnt_tainted($untainted, '$untainted should be untainted');
447ee134 2013 $untainted =~ s/(abc)/$1/;
f37ea7f0 2014 isnt_tainted($untainted, '$untainted should still be untainted');
447ee134 2015 $untainted =~ s/(abc)/x$1/;
f37ea7f0 2016 isnt_tainted($untainted, '$untainted should yet still be untainted');
447ee134
DM
2017}
2018
7e6078c6 2019{
d4456f89
JD
2020 # On Windows we can't spawn a fresh Perl interpreter unless at
2021 # least the Windows system directory (usually C:\Windows\System32)
2022 # is still on the PATH. There is however no way to determine the
2023 # actual path on the current system without loading the Win32
2024 # module, so we just restore the original $ENV{PATH} here.
2025 local $ENV{PATH} = $ENV{PATH};
2026 $ENV{PATH} = $old_env_path if $Is_MSWin32;
2027
7e6078c6
NT
2028 fresh_perl_is(<<'end', "ok", { switches => [ '-T' ] },
2029 $TAINT = substr($^X, 0, 0);
00cb33d6
FC
2030 formline('@'.('<'x("2000".$TAINT)).' | @*', 'hallo', 'welt');
2031 print "ok";
7e6078c6
NT
2032end
2033 "formline survives a tainted dynamic picture");
2034}
0097b436 2035
125b9982 2036{
f37ea7f0 2037 isnt_tainted($^A, "format accumulator not tainted yet");
99e6ea26 2038 formline('@ | @*', 'hallo' . $TAINT, 'welt');
f37ea7f0 2039 is_tainted($^A, "tainted formline argument makes a tainted accumulator");
99e6ea26 2040 $^A = "";
f37ea7f0 2041 isnt_tainted($^A, "accumulator can be explicitly untainted");
99e6ea26 2042 formline('@' .('<'*5) . ' | @*', 'hallo', 'welt');
f37ea7f0 2043 isnt_tainted($^A, "accumulator still untainted");
99e6ea26 2044 $^A = "" . $TAINT;
f37ea7f0 2045 is_tainted($^A, "accumulator can be explicitly tainted");
99e6ea26 2046 formline('@' .('<'*5) . ' | @*', 'hallo', 'welt');
f37ea7f0 2047 is_tainted($^A, "accumulator still tainted");
99e6ea26 2048 $^A = "";
f37ea7f0 2049 isnt_tainted($^A, "accumulator untainted again");
99e6ea26 2050 formline('@' .('<'*5) . ' | @*', 'hallo', 'welt');
f37ea7f0 2051 isnt_tainted($^A, "accumulator still untainted");
99e6ea26 2052 formline('@' .('<'*(5+$TAINT0)) . ' | @*', 'hallo', 'welt');
f2da823f 2053 is_tainted($^A, "the accumulator should be tainted already");
f37ea7f0 2054 is_tainted($^A, "tainted formline picture makes a tainted accumulator");
99e6ea26
NT
2055}
2056
929fffa4
KW
2057{ # Bug #80610
2058 "Constant(1)" =~ / ^ ([a-z_]\w*) (?: [(] (.*) [)] )? $ /xi;
2059 my $a = $1;
2060 my $b = $2;
f37ea7f0
NC
2061 isnt_tainted($a, "regex optimization of single char /[]/i doesn't taint");
2062 isnt_tainted($b, "regex optimization of single char /[]/i doesn't taint");
929fffa4
KW
2063}
2064
8985fe98
DM
2065{
2066 # RT 81230: tainted value during FETCH created extra ref to tied obj
2067
2068 package P81230;
2069 use warnings;
2070
2071 my %h;
2072
2073 sub TIEHASH {
2074 my $x = $^X; # tainted
2075 bless \$x;
2076 }
2077 sub FETCH { my $x = $_[0]; $$x . "" }
2078
2079 tie %h, 'P81230';
2080
2081 my $w = "";
2082 local $SIG{__WARN__} = sub { $w .= "@_" };
2083
2084 untie %h if $h{"k"};
2085
2086 ::is($w, "", "RT 81230");
2087}
2088
5a909b52
GG
2089{
2090 # Compiling a subroutine inside a tainted expression does not make the
2091 # constant folded values tainted.
2092 my $x = sub { "x" . "y" };
2093 my $y = $ENV{PATH} . $x->(); # Compile $x inside a tainted expression
2094 my $z = $x->();
f37ea7f0 2095 isnt_tainted($z, "Constants folded value not tainted");
5a909b52 2096}
8985fe98 2097
9274aefd
DM
2098{
2099 # now that regexes are first class SVs, make sure that they themselves
2100 # as well as references to them are tainted
2101
2102 my $rr = qr/(.)$TAINT/;
2103 my $r = $$rr; # bare REGEX
2104 my $s ="abc";
2105 ok($s =~ s/$r/x/, "match bare regex");
f37ea7f0 2106 is_tainted($s, "match bare regex taint");
9274aefd
DM
2107 is($s, 'xbc', "match bare regex taint value");
2108}
2109
0e9be77f
DM
2110{
2111 # [perl #82616] security Issues with user-defined \p{} properties
2112 # A using a tainted user-defined property should croak
2113
2114 sub IsA { sprintf "%02x", ord("A") }
2115
2116 my $prop = "IsA";
2117 ok("A" =~ /\p{$prop}/, "user-defined property: non-tainted case");
2118 $prop = "IsA$TAINT";
2119 eval { "A" =~ /\p{$prop}/};
2a53d331 2120 like($@, qr/Insecure user-defined property \\p\{main::IsA}/,
0e9be77f
DM
2121 "user-defined property: tainted case");
2122}
2123
539689e7
FC
2124{
2125 # [perl #87336] lc/uc(first) failing to taint the returned string
2126 my $source = "foo$TAINT";
2127 my $dest = lc $source;
2128 is_tainted $dest, "lc(tainted) taints its return value";
2129 $dest = lcfirst $source;
2130 is_tainted $dest, "lcfirst(tainted) taints its return value";
2131 $dest = uc $source;
2132 is_tainted $dest, "uc(tainted) taints its return value";
2133 $dest = ucfirst $source;
2134 is_tainted $dest, "ucfirst(tainted) taints its return value";
2135}
2136
fa22d357
VP
2137{
2138 # Taintedness of values returned from given()
2139 use feature 'switch';
2140
2141 my @descriptions = ('when', 'given end', 'default');
2142
2143 for (qw<x y z>) {
2144 my $letter = "$_$TAINT";
2145
2146 my $desc = "tainted value returned from " . shift(@descriptions);
2147
2148 my $res = do {
2149 given ($_) {
2150 when ('x') { $letter }
2151 when ('y') { goto leavegiven }
2152 default { $letter }
2153 leavegiven: $letter
2154 }
2155 };
2156 is $res, $letter, "$desc is correct";
2157 is_tainted $res, "$desc stays tainted";
2158 }
2159}
2160
0d1104b4
NT
2161
2162# tainted constants and index()
2163# RT 64804; http://bugs.debian.org/291450
2164{
2165 ok(tainted $old_env_path, "initial taintedness");
2166 BEGIN { no strict 'refs'; my $v = $old_env_path; *{"::C"} = sub () { $v }; }
2167 ok(tainted C, "constant is tainted properly");
2168 ok(!tainted "", "tainting not broken yet");
2169 index(undef, C);
0d1104b4
NT
2170 ok(!tainted "", "tainting still works after index() of the constant");
2171}
2172
be88a5c3
FC
2173# Tainted values with smartmatch
2174# [perl #93590] S_do_smartmatch stealing its own string buffers
2175ok "M$TAINT" ~~ ['m', 'M'], '$tainted ~~ ["whatever", "match"]';
2176ok !("M$TAINT" ~~ ['m', undef]), '$tainted ~~ ["whatever", undef]';
0d1104b4 2177
5a0c33f0
FC
2178# Tainted values and ref()
2179for(1,2) {
2180 my $x = bless \"M$TAINT", ref(bless[], "main");
2181}
2182pass("no death when TARG of ref is tainted");
2183
19db9fb7
Z
2184# $$ should not be tainted by being read in a tainted expression.
2185{
2186 isnt_tainted $$, "PID not tainted initially";
2187 my $x = $ENV{PATH}.$$;
2188 isnt_tainted $$, "PID not tainted when read in tainted expression";
2189}
2190
838f2281
BF
2191{
2192 use feature 'fc';
2193 use locale;
2194 my ($latin1, $utf8) = ("\xDF") x 2;
2195 utf8::downgrade($latin1);
2196 utf8::upgrade($utf8);
2197
2198 is_tainted fc($latin1), "under locale, lc(latin1) taints the result";
2199 is_tainted fc($utf8), "under locale, lc(utf8) taints the result";
2200
2201 is_tainted "\F$latin1", "under locale, \\Flatin1 taints the result";
2202 is_tainted "\F$utf8", "under locale, \\Futf8 taints the result";
2203}
0d1104b4 2204
af89892e 2205{ # 111654
af89892e
TC
2206 eval {
2207 eval { die "Test\n".substr($ENV{PATH}, 0, 0); };
2208 die;
2209 };
2210 like($@, qr/^Test\n\t\.\.\.propagated at /, "error should be propagated");
2211}
2212
d24ca0c5
DM
2213# tainted run-time (?{}) should die
2214
2215{
2216 my $code = '(?{})' . $TAINT;
2217 use re 'eval';
2218 eval { "a" =~ /$code/ };
2219 like($@, qr/Eval-group in insecure regular expression/, "tainted (?{})");
2220}
2221
beeaa6fd
NC
2222# This may bomb out with the alarm signal so keep it last
2223SKIP: {
2224 skip "No alarm()" unless $Config{d_alarm};
2225 # Test from RT #41831]
2226 # [PATCH] Bug & fix: hang when using study + taint mode (perl 5.6.1, 5.8.x)
2227
2228 my $DATA = <<'END' . $TAINT;
2229line1 is here
2230line2 is here
2231line3 is here
2232line4 is here
2233
2234END
2235
2236 #study $DATA;
2237
2238 ## don't set $SIG{ALRM}, since we'd never get to a user-level handler as
2239 ## perl is stuck in a regexp infinite loop!
2240
2241 alarm(10);
2242
2243 if ($DATA =~ /^line2.*line4/m) {
2244 fail("Should not be a match")
2245 } else {
2246 pass("Match on tainted multiline data should fail promptly");
2247 }
2248
2249 alarm(0);
2250}
2251__END__
2252# Keep the previous test last