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help cygwin find its dlls even on taint tests with no path
[perl5.git] / t / op / taint.t
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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
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7# better than having no tests at all, right?
8#
9
10BEGIN {
11 chdir 't' if -d 't';
20822f61 12 @INC = '../lib';
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13}
14
15use strict;
16use Config;
dc459aad 17use File::Spec::Functions;
1e422769 18
09f04786 19BEGIN { require './test.pl'; }
085bde85 20plan tests => 257;
7c36658b 21
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22$| = 1;
23
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24use vars qw($ipcsysv); # did we manage to load IPC::SysV?
25
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26BEGIN {
27 if ($^O eq 'VMS' && !defined($Config{d_setenv})) {
28 $ENV{PATH} = $ENV{PATH};
29 $ENV{TERM} = $ENV{TERM} ne ''? $ENV{TERM} : 'dummy';
30 }
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31 if ($Config{'extensions'} =~ /\bIPC\/SysV\b/
32 && ($Config{d_shm} || $Config{d_msg})) {
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33 eval { require IPC::SysV };
34 unless ($@) {
35 $ipcsysv++;
ddc3217d 36 IPC::SysV->import(qw(IPC_PRIVATE IPC_RMID IPC_CREAT S_IRWXU IPC_NOWAIT));
c9f931b8 37 }
b9d1c439 38 }
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39}
40
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41my $Is_MacOS = $^O eq 'MacOS';
42my $Is_VMS = $^O eq 'VMS';
43my $Is_MSWin32 = $^O eq 'MSWin32';
44my $Is_NetWare = $^O eq 'NetWare';
45my $Is_Dos = $^O eq 'dos';
46my $Is_Cygwin = $^O eq 'cygwin';
8c2c7bd1 47my $Is_OpenBSD = $^O eq 'openbsd';
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48my $Invoke_Perl = $Is_VMS ? 'MCR Sys$Disk:[]Perl.' :
49 $Is_MSWin32 ? '.\perl' :
50 $Is_MacOS ? ':perl' :
51 $Is_NetWare ? 'perl' :
52 './perl' ;
c90c0ff4 53my @MoreEnv = qw/IFS CDPATH ENV BASH_ENV/;
7bac28a0 54
1e422769 55if ($Is_VMS) {
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56 my (%old, $x);
57 for $x ('DCL$PATH', @MoreEnv) {
58 ($old{$x}) = $ENV{$x} =~ /^(.*)$/ if exists $ENV{$x};
59 }
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60 eval <<EndOfCleanup;
61 END {
3eeba6fb 62 \$ENV{PATH} = '' if $Config{d_setenv};
1e422769 63 warn "# Note: logical name 'PATH' may have been deleted\n";
562a7b0c 64 \@ENV{keys %old} = values %old;
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65 }
66EndOfCleanup
67}
68
69# Sources of taint:
70# The empty tainted value, for tainting strings
71my $TAINT = substr($^X, 0, 0);
72# A tainted zero, useful for tainting numbers
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73my $TAINT0;
74{
75 no warnings;
76 $TAINT0 = 0 + $TAINT;
77}
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78
79# This taints each argument passed. All must be lvalues.
80# Side effect: It also stringifies them. :-(
81sub taint_these (@) {
82 for (@_) { $_ .= $TAINT }
83}
84
85# How to identify taint when you see it
86sub any_tainted (@) {
87 not eval { join("",@_), kill 0; 1 };
88}
89sub tainted ($) {
90 any_tainted @_;
91}
92sub all_tainted (@) {
93 for (@_) { return 0 unless tainted $_ }
94 1;
95}
96
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97
98sub test ($;$) {
99 my($ok, $diag) = @_;
100
101 my $curr_test = curr_test();
102
103 if ($ok) {
104 print "ok $curr_test\n";
1e422769 105 } else {
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106 print "not ok $curr_test\n";
107 printf "# Failed test at line %d\n", (caller)[2];
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108 for (split m/^/m, $diag) {
109 print "# $_";
110 }
9607fc9c 111 print "\n" unless
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112 $diag eq ''
113 or substr($diag, -1) eq "\n";
114 }
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115
116 next_test();
117
118 return $ok;
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119}
120
121# We need an external program to call.
dc459aad 122my $ECHO = ($Is_MSWin32 ? ".\\echo$$" : $Is_MacOS ? ":echo$$" : ($Is_NetWare ? "echo$$" : "./echo$$"));
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123END { unlink $ECHO }
124open PROG, "> $ECHO" or die "Can't create $ECHO: $!";
125print PROG 'print "@ARGV\n"', "\n";
126close PROG;
127my $echo = "$Invoke_Perl $ECHO";
128
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129my $TEST = catfile(curdir(), 'TEST');
130
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131# First, let's make sure that Perl is checking the dangerous
132# environment variables. Maybe they aren't set yet, so we'll
133# taint them ourselves.
134{
135 $ENV{'DCL$PATH'} = '' if $Is_VMS;
136
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137 if ($Is_MSWin32 && $Config{ccname} =~ /bcc32/ && ! -f 'cc3250mt.dll') {
138 my $bcc_dir;
139 foreach my $dir (split /$Config{path_sep}/, $ENV{PATH}) {
140 if (-f "$dir/cc3250mt.dll") {
141 $bcc_dir = $dir and last;
142 }
143 }
144 if (defined $bcc_dir) {
145 require File::Copy;
146 File::Copy::copy("$bcc_dir/cc3250mt.dll", '.') or
147 die "$0: failed to copy cc3250mt.dll: $!\n";
148 eval q{
149 END { unlink "cc3250mt.dll" }
150 };
151 }
152 }
153
7bac28a0 154 $ENV{PATH} = '';
c90c0ff4 155 delete @ENV{@MoreEnv};
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156 $ENV{TERM} = 'dumb';
157
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158 test eval { `$echo 1` } eq "1\n";
159
160 SKIP: {
161 skip "Environment tainting tests skipped", 4
162 if $Is_MSWin32 || $Is_NetWare || $Is_VMS || $Is_Dos || $Is_MacOS;
7bac28a0 163
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PP
164 my @vars = ('PATH', @MoreEnv);
165 while (my $v = $vars[0]) {
166 local $ENV{$v} = $TAINT;
167 last if eval { `$echo 1` };
168 last unless $@ =~ /^Insecure \$ENV{$v}/;
169 shift @vars;
170 }
09f04786 171 test !@vars, "@vars";
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172
173 # tainted $TERM is unsafe only if it contains metachars
174 local $ENV{TERM};
175 $ENV{TERM} = 'e=mc2';
09f04786 176 test eval { `$echo 1` } eq "1\n";
c90c0ff4 177 $ENV{TERM} = 'e=mc2' . $TAINT;
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178 test !eval { `$echo 1` };
179 test $@ =~ /^Insecure \$ENV{TERM}/, $@;
5aabfad6 180 }
7bac28a0 181
9607fc9c 182 my $tmp;
2986a63f 183 if ($^O eq 'os2' || $^O eq 'amigaos' || $Is_MSWin32 || $Is_NetWare || $Is_Dos) {
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184 print "# all directories are writeable\n";
185 }
186 else {
9607fc9c 187 $tmp = (grep { defined and -d and (stat _)[2] & 2 }
099f76bb 188 qw(sys$scratch /tmp /var/tmp /usr/tmp),
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189 @ENV{qw(TMP TEMP)})[0]
190 or print "# can't find world-writeable directory to test PATH\n";
191 }
192
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193 SKIP: {
194 skip "all directories are writeable", 2 unless $tmp;
195
7bac28a0 196 local $ENV{PATH} = $tmp;
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197 test !eval { `$echo 1` };
198 test $@ =~ /^Insecure directory in \$ENV{PATH}/, $@;
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199 }
200
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201 SKIP: {
202 skip "This is not VMS", 4 unless $Is_VMS;
203
1e422769 204 $ENV{'DCL$PATH'} = $TAINT;
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205 test eval { `$echo 1` } eq '';
206 test $@ =~ /^Insecure \$ENV{DCL\$PATH}/, $@;
207 SKIP: {
208 skip q[can't find world-writeable directory to test DCL$PATH], 2
25fb98c0 209 unless $tmp;
09f04786 210
9607fc9c 211 $ENV{'DCL$PATH'} = $tmp;
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212 test eval { `$echo 1` } eq '';
213 test $@ =~ /^Insecure directory in \$ENV{DCL\$PATH}/, $@;
9607fc9c 214 }
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215 $ENV{'DCL$PATH'} = '';
216 }
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217}
218
219# Let's see that we can taint and untaint as needed.
220{
221 my $foo = $TAINT;
09f04786 222 test tainted $foo;
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223
224 # That was a sanity check. If it failed, stop the insanity!
225 die "Taint checks don't seem to be enabled" unless tainted $foo;
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226
227 $foo = "foo";
09f04786 228 test not tainted $foo;
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229
230 taint_these($foo);
09f04786 231 test tainted $foo;
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232
233 my @list = 1..10;
09f04786 234 test not any_tainted @list;
1e422769 235 taint_these @list[1,3,5,7,9];
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236 test any_tainted @list;
237 test all_tainted @list[1,3,5,7,9];
238 test not any_tainted @list[0,2,4,6,8];
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239
240 ($foo) = $foo =~ /(.+)/;
09f04786 241 test not tainted $foo;
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242
243 $foo = $1 if ('bar' . $TAINT) =~ /(.+)/;
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244 test not tainted $foo;
245 test $foo eq 'bar';
1e422769 246
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247 {
248 use re 'taint';
249
250 ($foo) = ('bar' . $TAINT) =~ /(.+)/;
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251 test tainted $foo;
252 test $foo eq 'bar';
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253
254 $foo = $1 if ('bar' . $TAINT) =~ /(.+)/;
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255 test tainted $foo;
256 test $foo eq 'bar';
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257 }
258
259 $foo = $1 if 'bar' =~ /(.+)$TAINT/;
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260 test tainted $foo;
261 test $foo eq 'bar';
48c036b1 262
1e422769 263 my $pi = 4 * atan2(1,1) + $TAINT0;
09f04786 264 test tainted $pi;
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265
266 ($pi) = $pi =~ /(\d+\.\d+)/;
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267 test not tainted $pi;
268 test sprintf("%.5f", $pi) eq '3.14159';
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269}
270
271# How about command-line arguments? The problem is that we don't
272# always get some, so we'll run another process with some.
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273SKIP: {
274 my $arg = catfile(curdir(), "arg$$");
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275 open PROG, "> $arg" or die "Can't create $arg: $!";
276 print PROG q{
277 eval { join('', @ARGV), kill 0 };
278 exit 0 if $@ =~ /^Insecure dependency/;
279 print "# Oops: \$@ was [$@]\n";
280 exit 1;
281 };
282 close PROG;
283 print `$Invoke_Perl "-T" $arg and some suspect arguments`;
09f04786 284 test !$?, "Exited with status $?";
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285 unlink $arg;
286}
287
288# Reading from a file should be tainted
289{
09f04786 290 test open(FILE, $TEST), "Couldn't open '$TEST': $!";
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291
292 my $block;
293 sysread(FILE, $block, 100);
9607fc9c 294 my $line = <FILE>;
1e422769 295 close FILE;
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296 test tainted $block;
297 test tainted $line;
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298}
299
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300# Globs should be forbidden, except under VMS,
301# which doesn't spawn an external program.
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302SKIP: {
303 skip "globs should be forbidden", 2 if 1 or $Is_VMS;
304
7bac28a0 305 my @globs = eval { <*> };
09f04786 306 test @globs == 0 && $@ =~ /^Insecure dependency/;
1e422769 307
7bac28a0 308 @globs = eval { glob '*' };
09f04786 309 test @globs == 0 && $@ =~ /^Insecure dependency/;
1e422769
PP
310}
311
312# Output of commands should be tainted
313{
314 my $foo = `$echo abc`;
09f04786 315 test tainted $foo;
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316}
317
318# Certain system variables should be tainted
319{
09f04786 320 test all_tainted $^X, $0;
1e422769
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321}
322
323# Results of matching should all be untainted
324{
325 my $foo = "abcdefghi" . $TAINT;
09f04786 326 test tainted $foo;
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327
328 $foo =~ /def/;
09f04786 329 test not any_tainted $`, $&, $';
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330
331 $foo =~ /(...)(...)(...)/;
09f04786 332 test not any_tainted $1, $2, $3, $+;
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333
334 my @bar = $foo =~ /(...)(...)(...)/;
09f04786 335 test not any_tainted @bar;
1e422769 336
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337 test tainted $foo; # $foo should still be tainted!
338 test $foo eq "abcdefghi";
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339}
340
341# Operations which affect files can't use tainted data.
342{
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343 test !eval { chmod 0, $TAINT }, 'chmod';
344 test $@ =~ /^Insecure dependency/, $@;
1e422769 345
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PP
346 # There is no feature test in $Config{} for truncate,
347 # so we allow for the possibility that it's missing.
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348 test !eval { truncate 'NoSuChFiLe', $TAINT0 }, 'truncate';
349 test $@ =~ /^(?:Insecure dependency|truncate not implemented)/, $@;
1e422769 350
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351 test !eval { rename '', $TAINT }, 'rename';
352 test $@ =~ /^Insecure dependency/, $@;
1e422769 353
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354 test !eval { unlink $TAINT }, 'unlink';
355 test $@ =~ /^Insecure dependency/, $@;
9607fc9c 356
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357 test !eval { utime $TAINT }, 'utime';
358 test $@ =~ /^Insecure dependency/, $@;
48c036b1 359
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360 SKIP: {
361 skip "chown() is not available", 2 unless $Config{d_chown};
1e422769 362
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363 test !eval { chown -1, -1, $TAINT }, 'chown';
364 test $@ =~ /^Insecure dependency/, $@;
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PP
365 }
366
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367 SKIP: {
368 skip "link() is not available", 2 unless $Config{d_link};
369
370 test !eval { link $TAINT, '' }, 'link';
371 test $@ =~ /^Insecure dependency/, $@;
1e422769 372 }
09f04786
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373
374 SKIP: {
375 skip "symlink() is not available", 2 unless $Config{d_symlink};
376
377 test !eval { symlink $TAINT, '' }, 'symlink';
378 test $@ =~ /^Insecure dependency/, $@;
1e422769
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379 }
380}
381
382# Operations which affect directories can't use tainted data.
383{
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384 test !eval { mkdir "foo".$TAINT, 0755.$TAINT0 }, 'mkdir';
385 test $@ =~ /^Insecure dependency/, $@;
1e422769 386
09f04786
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387 test !eval { rmdir $TAINT }, 'rmdir';
388 test $@ =~ /^Insecure dependency/, $@;
9607fc9c 389
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390 test !eval { chdir "foo".$TAINT }, 'chdir';
391 test $@ =~ /^Insecure dependency/, $@;
48c036b1 392
09f04786
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393 SKIP: {
394 skip "chroot() is not available", 2 unless $Config{d_chroot};
395
396 test !eval { chroot $TAINT }, 'chroot';
397 test $@ =~ /^Insecure dependency/, $@;
1e422769
PP
398 }
399}
400
401# Some operations using files can't use tainted data.
402{
403 my $foo = "imaginary library" . $TAINT;
09f04786
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404 test !eval { require $foo }, 'require';
405 test $@ =~ /^Insecure dependency/, $@;
1e422769
PP
406
407 my $filename = "./taintB$$"; # NB: $filename isn't tainted!
408 END { unlink $filename if defined $filename }
409 $foo = $filename . $TAINT;
410 unlink $filename; # in any case
411
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412 test !eval { open FOO, $foo }, 'open for read';
413 test $@ eq '', $@; # NB: This should be allowed
9d116dd7
JH
414
415 # Try first new style but allow also old style.
327ccce1
YST
416 # We do not want the whole taint.t to fail
417 # just because Errno possibly failing.
09f04786 418 test eval('$!{ENOENT}') ||
61ae2fbf
JH
419 $! == 2 || # File not found
420 ($Is_Dos && $! == 22) ||
421 ($^O eq 'mint' && $! == 33);
1e422769 422
09f04786
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423 test !eval { open FOO, "> $foo" }, 'open for write';
424 test $@ =~ /^Insecure dependency/, $@;
1e422769
PP
425}
426
427# Commands to the system can't use tainted data
428{
429 my $foo = $TAINT;
430
09f04786
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431 SKIP: {
432 skip "open('|') is not available", 4 if $^O eq 'amigaos';
433
434 test !eval { open FOO, "| x$foo" }, 'popen to';
435 test $@ =~ /^Insecure dependency/, $@;
1e422769 436
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MS
437 test !eval { open FOO, "x$foo |" }, 'popen from';
438 test $@ =~ /^Insecure dependency/, $@;
48c036b1 439 }
1e422769 440
09f04786
MS
441 test !eval { exec $TAINT }, 'exec';
442 test $@ =~ /^Insecure dependency/, $@;
9607fc9c 443
09f04786
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444 test !eval { system $TAINT }, 'system';
445 test $@ =~ /^Insecure dependency/, $@;
48c036b1 446
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PP
447 $foo = "*";
448 taint_these $foo;
449
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450 test !eval { `$echo 1$foo` }, 'backticks';
451 test $@ =~ /^Insecure dependency/, $@;
1e422769 452
09f04786
MS
453 SKIP: {
454 # wildcard expansion doesn't invoke shell on VMS, so is safe
455 skip "This is not VMS", 2 unless $Is_VMS;
456
457 test join('', eval { glob $foo } ) ne '', 'globbing';
458 test $@ eq '', $@;
1e422769
PP
459 }
460}
461
462# Operations which affect processes can't use tainted data.
463{
09f04786
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464 test !eval { kill 0, $TAINT }, 'kill';
465 test $@ =~ /^Insecure dependency/, $@;
1e422769 466
09f04786
MS
467 SKIP: {
468 skip "setpgrp() is not available", 2 unless $Config{d_setpgrp};
1e422769 469
09f04786
MS
470 test !eval { setpgrp 0, $TAINT0 }, 'setpgrp';
471 test $@ =~ /^Insecure dependency/, $@;
1e422769 472 }
09f04786
MS
473
474 SKIP: {
475 skip "setpriority() is not available", 2 unless $Config{d_setprior};
476
477 test !eval { setpriority 0, $TAINT0, $TAINT0 }, 'setpriority';
478 test $@ =~ /^Insecure dependency/, $@;
1e422769
PP
479 }
480}
481
482# Some miscellaneous operations can't use tainted data.
483{
09f04786
MS
484 SKIP: {
485 skip "syscall() is not available", 2 unless $Config{d_syscall};
486
487 test !eval { syscall $TAINT }, 'syscall';
488 test $@ =~ /^Insecure dependency/, $@;
1e422769
PP
489 }
490
491 {
492 my $foo = "x" x 979;
493 taint_these $foo;
494 local *FOO;
495 my $temp = "./taintC$$";
496 END { unlink $temp }
09f04786 497 test open(FOO, "> $temp"), "Couldn't open $temp for write: $!";
1e422769 498
09f04786
MS
499 test !eval { ioctl FOO, $TAINT0, $foo }, 'ioctl';
500 test $@ =~ /^Insecure dependency/, $@;
1e422769 501
09f04786
MS
502 SKIP: {
503 skip "fcntl() is not available", 2 unless $Config{d_fcntl};
504
505 test !eval { fcntl FOO, $TAINT0, $foo }, 'fcntl';
506 test $@ =~ /^Insecure dependency/, $@;
1e422769
PP
507 }
508
509 close FOO;
510 }
511}
512
9607fc9c 513# Some tests involving references
1e422769
PP
514{
515 my $foo = 'abc' . $TAINT;
516 my $fooref = \$foo;
09f04786
MS
517 test not tainted $fooref;
518 test tainted $$fooref;
519 test tainted $foo;
1e422769 520}
54310121
PP
521
522# Some tests involving assignment
523{
524 my $foo = $TAINT0;
525 my $bar = $foo;
09f04786
MS
526 test all_tainted $foo, $bar;
527 test tainted($foo = $bar);
528 test tainted($bar = $bar);
529 test tainted($bar += $bar);
530 test tainted($bar -= $bar);
531 test tainted($bar *= $bar);
532 test tainted($bar++);
533 test tainted($bar /= $bar);
534 test tainted($bar += 0);
535 test tainted($bar -= 2);
536 test tainted($bar *= -1);
537 test tainted($bar /= 1);
538 test tainted($bar--);
539 test $bar == 0;
54310121 540}
a1f49e72
CS
541
542# Test assignment and return of lists
543{
544 my @foo = ("A", "tainted" . $TAINT, "B");
09f04786
MS
545 test not tainted $foo[0];
546 test tainted $foo[1];
547 test not tainted $foo[2];
a1f49e72 548 my @bar = @foo;
09f04786
MS
549 test not tainted $bar[0];
550 test tainted $bar[1];
551 test not tainted $bar[2];
a1f49e72 552 my @baz = eval { "A", "tainted" . $TAINT, "B" };
09f04786
MS
553 test not tainted $baz[0];
554 test tainted $baz[1];
555 test not tainted $baz[2];
a1f49e72 556 my @plugh = eval q[ "A", "tainted" . $TAINT, "B" ];
09f04786
MS
557 test not tainted $plugh[0];
558 test tainted $plugh[1];
559 test not tainted $plugh[2];
a1f49e72 560 my $nautilus = sub { "A", "tainted" . $TAINT, "B" };
09f04786
MS
561 test not tainted ((&$nautilus)[0]);
562 test tainted ((&$nautilus)[1]);
563 test not tainted ((&$nautilus)[2]);
a1f49e72 564 my @xyzzy = &$nautilus;
09f04786
MS
565 test not tainted $xyzzy[0];
566 test tainted $xyzzy[1];
567 test not tainted $xyzzy[2];
a1f49e72 568 my $red_october = sub { return "A", "tainted" . $TAINT, "B" };
09f04786
MS
569 test not tainted ((&$red_october)[0]);
570 test tainted ((&$red_october)[1]);
571 test not tainted ((&$red_october)[2]);
a1f49e72 572 my @corge = &$red_october;
09f04786
MS
573 test not tainted $corge[0];
574 test tainted $corge[1];
575 test not tainted $corge[2];
a1f49e72 576}
fb73857a
PP
577
578# Test for system/library calls returning string data of dubious origin.
579{
580 # No reliable %Config check for getpw*
09f04786
MS
581 SKIP: {
582 skip "getpwent() is not available", 1 unless
583 eval { setpwent(); getpwent() };
584
fb73857a
PP
585 setpwent();
586 my @getpwent = getpwent();
587 die "getpwent: $!\n" unless (@getpwent);
09f04786 588 test ( not tainted $getpwent[0]
2959b6e3 589 and tainted $getpwent[1]
fb73857a
PP
590 and not tainted $getpwent[2]
591 and not tainted $getpwent[3]
592 and not tainted $getpwent[4]
593 and not tainted $getpwent[5]
3972a534 594 and tainted $getpwent[6] # ge?cos
fb73857a 595 and not tainted $getpwent[7]
3972a534 596 and tainted $getpwent[8]); # shell
fb73857a 597 endpwent();
fb73857a
PP
598 }
599
09f04786
MS
600 SKIP: {
601 # pretty hard to imagine not
602 skip "readdir() is not available", 1 unless $Config{d_readdir};
603
fb73857a
PP
604 local(*D);
605 opendir(D, "op") or die "opendir: $!\n";
606 my $readdir = readdir(D);
09f04786
MS
607 test tainted $readdir;
608 closedir(D);
fb73857a
PP
609 }
610
09f04786
MS
611 SKIP: {
612 skip "readlink() or symlink() is not available" unless
613 $Config{d_readlink} && $Config{d_symlink};
614
fb73857a
PP
615 my $symlink = "sl$$";
616 unlink($symlink);
dc459aad
JH
617 my $sl = "/something/naughty";
618 # it has to be a real path on Mac OS
619 $sl = MacPerl::MakePath((MacPerl::Volumes())[0]) if $Is_MacOS;
620 symlink($sl, $symlink) or die "symlink: $!\n";
fb73857a 621 my $readlink = readlink($symlink);
09f04786 622 test tainted $readlink;
fb73857a 623 unlink($symlink);
fb73857a
PP
624 }
625}
626
627# test bitwise ops (regression bug)
628{
629 my $why = "y";
630 my $j = "x" | $why;
09f04786 631 test not tainted $j;
fb73857a
PP
632 $why = $TAINT."y";
633 $j = "x" | $why;
09f04786 634 test tainted $j;
fb73857a
PP
635}
636
48c036b1
GS
637# test target of substitution (regression bug)
638{
639 my $why = $TAINT."y";
640 $why =~ s/y/z/;
09f04786 641 test tainted $why;
48c036b1
GS
642
643 my $z = "[z]";
644 $why =~ s/$z/zee/;
09f04786 645 test tainted $why;
48c036b1
GS
646
647 $why =~ s/e/'-'.$$/ge;
09f04786 648 test tainted $why;
48c036b1 649}
d929ce6f 650
09f04786
MS
651
652SKIP: {
653 skip "no IPC::SysV", 2 unless $ipcsysv;
654
655 # test shmread
656 SKIP: {
657 skip "shm*() not available", 1 unless $Config{d_shm};
658
659 no strict 'subs';
660 my $sent = "foobar";
661 my $rcvd;
662 my $size = 2000;
663 my $id = shmget(IPC_PRIVATE, $size, S_IRWXU);
664
665 if (defined $id) {
666 if (shmwrite($id, $sent, 0, 60)) {
667 if (shmread($id, $rcvd, 0, 60)) {
668 substr($rcvd, index($rcvd, "\0")) = '';
669 } else {
670 warn "# shmread failed: $!\n";
671 }
672 } else {
673 warn "# shmwrite failed: $!\n";
674 }
675 shmctl($id, IPC_RMID, 0) or warn "# shmctl failed: $!\n";
676 } else {
677 warn "# shmget failed: $!\n";
678 }
679
680 skip "SysV shared memory operation failed", 1 unless
681 $rcvd eq $sent;
682
683 test tainted $rcvd;
c9f931b8 684 }
c2e66d9e 685
d929ce6f 686
09f04786
MS
687 # test msgrcv
688 SKIP: {
689 skip "msg*() not available", 1 unless $Config{d_msg};
41d6edb2 690
b9d1c439 691 no strict 'subs';
41d6edb2
JH
692 my $id = msgget(IPC_PRIVATE, IPC_CREAT | S_IRWXU);
693
694 my $sent = "message";
695 my $type_sent = 1234;
696 my $rcvd;
697 my $type_rcvd;
698
699 if (defined $id) {
ddc3217d
JH
700 if (msgsnd($id, pack("l! a*", $type_sent, $sent), IPC_NOWAIT)) {
701 if (msgrcv($id, $rcvd, 60, 0, IPC_NOWAIT)) {
41d6edb2
JH
702 ($type_rcvd, $rcvd) = unpack("l! a*", $rcvd);
703 } else {
ddc3217d 704 warn "# msgrcv failed: $!\n";
41d6edb2
JH
705 }
706 } else {
ddc3217d 707 warn "# msgsnd failed: $!\n";
41d6edb2 708 }
c2e66d9e 709 msgctl($id, IPC_RMID, 0) or warn "# msgctl failed: $!\n";
41d6edb2
JH
710 } else {
711 warn "# msgget failed\n";
712 }
713
09f04786
MS
714 SKIP: {
715 skip "SysV message queue operation failed", 1
716 unless $rcvd eq $sent && $type_sent == $type_rcvd;
717
718 test tainted $rcvd;
41d6edb2 719 }
41d6edb2
JH
720 }
721}
722
3887d568
AP
723{
724 # bug id 20001004.006
725
dc459aad 726 open IN, $TEST or warn "$0: cannot read $TEST: $!" ;
3887d568
AP
727 local $/;
728 my $a = <IN>;
729 my $b = <IN>;
09f04786
MS
730
731 ok tainted($a) && tainted($b) && !defined($b);
732
27c9684d 733 close IN;
3887d568 734}
27c9684d
AP
735
736{
737 # bug id 20001004.007
738
dc459aad 739 open IN, $TEST or warn "$0: cannot read $TEST: $!" ;
27c9684d
AP
740 my $a = <IN>;
741
742 my $c = { a => 42,
743 b => $a };
09f04786
MS
744
745 ok !tainted($c->{a}) && tainted($c->{b});
746
27c9684d
AP
747
748 my $d = { a => $a,
749 b => 42 };
09f04786
MS
750 ok tainted($d->{a}) && !tainted($d->{b});
751
27c9684d
AP
752
753 my $e = { a => 42,
754 b => { c => $a, d => 42 } };
09f04786
MS
755 ok !tainted($e->{a}) &&
756 !tainted($e->{b}) &&
757 tainted($e->{b}->{c}) &&
758 !tainted($e->{b}->{d});
27c9684d
AP
759
760 close IN;
761}
762
b94c04ac
JH
763{
764 # bug id 20010519.003
765
248c32c0
JH
766 BEGIN {
767 use vars qw($has_fcntl);
768 eval { require Fcntl; import Fcntl; };
769 unless ($@) {
770 $has_fcntl = 1;
771 }
772 }
b94c04ac 773
09f04786
MS
774 SKIP: {
775 skip "no Fcntl", 18 unless $has_fcntl;
776
248c32c0
JH
777 my $evil = "foo" . $TAINT;
778
779 eval { sysopen(my $ro, $evil, &O_RDONLY) };
09f04786 780 test $@ !~ /^Insecure dependency/, $@;
248c32c0
JH
781
782 eval { sysopen(my $wo, $evil, &O_WRONLY) };
09f04786 783 test $@ =~ /^Insecure dependency/, $@;
248c32c0
JH
784
785 eval { sysopen(my $rw, $evil, &O_RDWR) };
09f04786 786 test $@ =~ /^Insecure dependency/, $@;
248c32c0
JH
787
788 eval { sysopen(my $ap, $evil, &O_APPEND) };
09f04786 789 test $@ =~ /^Insecure dependency/, $@;
248c32c0
JH
790
791 eval { sysopen(my $cr, $evil, &O_CREAT) };
09f04786 792 test $@ =~ /^Insecure dependency/, $@;
248c32c0
JH
793
794 eval { sysopen(my $tr, $evil, &O_TRUNC) };
09f04786 795 test $@ =~ /^Insecure dependency/, $@;
248c32c0 796
09f04786
MS
797 eval { sysopen(my $ro, "foo", &O_RDONLY | $TAINT0) };
798 test $@ !~ /^Insecure dependency/, $@;
248c32c0 799
09f04786
MS
800 eval { sysopen(my $wo, "foo", &O_WRONLY | $TAINT0) };
801 test $@ =~ /^Insecure dependency/, $@;
248c32c0 802
09f04786
MS
803 eval { sysopen(my $rw, "foo", &O_RDWR | $TAINT0) };
804 test $@ =~ /^Insecure dependency/, $@;
248c32c0 805
09f04786
MS
806 eval { sysopen(my $ap, "foo", &O_APPEND | $TAINT0) };
807 test $@ =~ /^Insecure dependency/, $@;
248c32c0 808
09f04786
MS
809 eval { sysopen(my $cr, "foo", &O_CREAT | $TAINT0) };
810 test $@ =~ /^Insecure dependency/, $@;
248c32c0 811
09f04786
MS
812 eval { sysopen(my $tr, "foo", &O_TRUNC | $TAINT0) };
813 test $@ =~ /^Insecure dependency/, $@;
248c32c0 814
09f04786
MS
815 eval { sysopen(my $ro, "foo", &O_RDONLY, $TAINT0) };
816 test $@ !~ /^Insecure dependency/, $@;
248c32c0 817
09f04786
MS
818 eval { sysopen(my $wo, "foo", &O_WRONLY, $TAINT0) };
819 test $@ =~ /^Insecure dependency/, $@;
248c32c0 820
09f04786
MS
821 eval { sysopen(my $rw, "foo", &O_RDWR, $TAINT0) };
822 test $@ =~ /^Insecure dependency/, $@;
248c32c0 823
09f04786
MS
824 eval { sysopen(my $ap, "foo", &O_APPEND, $TAINT0) };
825 test $@ =~ /^Insecure dependency/, $@;
248c32c0 826
09f04786
MS
827 eval { sysopen(my $cr, "foo", &O_CREAT, $TAINT0) };
828 test $@ =~ /^Insecure dependency/, $@;
248c32c0 829
09f04786
MS
830 eval { sysopen(my $tr, "foo", &O_TRUNC, $TAINT0) };
831 test $@ =~ /^Insecure dependency/, $@;
248c32c0
JH
832
833 unlink("foo"); # not unlink($evil), because that would fail...
834 }
b94c04ac
JH
835}
836
65811bc3
JH
837{
838 # bug 20010526.004
839
840 use warnings;
841
09f04786
MS
842 my $saw_warning = 0;
843 local $SIG{__WARN__} = sub { $saw_warning = 1 };
65811bc3
JH
844
845 sub fmi {
846 my $divnum = shift()/1;
847 sprintf("%1.1f\n", $divnum);
848 }
849
850 fmi(21 . $TAINT);
851 fmi(37);
852 fmi(248);
853
09f04786 854 test !$saw_warning;
65811bc3
JH
855}
856
9e1b5a4e
A
857
858{
859 # Bug ID 20010730.010
860
861 my $i = 0;
862
863 sub Tie::TIESCALAR {
864 my $class = shift;
865 my $arg = shift;
866
867 bless \$arg => $class;
868 }
869
870 sub Tie::FETCH {
871 $i ++;
872 ${$_ [0]}
873 }
874
875
876 package main;
877
878 my $bar = "The Big Bright Green Pleasure Machine";
879 taint_these $bar;
880 tie my ($foo), Tie => $bar;
881
882 my $baz = $foo;
883
09f04786 884 ok $i == 1;
9e1b5a4e
A
885}
886
8852b6d2
JH
887{
888 # Check that all environment variables are tainted.
889 my @untainted;
890 while (my ($k, $v) = each %ENV) {
891 if (!tainted($v) &&
eb25aaf6
HS
892 # These we have explicitly untainted or set earlier.
893 $k !~ /^(BASH_ENV|CDPATH|ENV|IFS|PATH|PERL_CORE|TEMP|TERM|TMP)$/) {
8852b6d2
JH
894 push @untainted, "# '$k' = '$v'\n";
895 }
896 }
09f04786 897 test @untainted == 0, "untainted:\n @untainted";
8852b6d2 898}
9e1b5a4e
A
899
900
9aa05f58 901ok( ${^TAINT} == 1, '$^TAINT is on' );
7c36658b
MS
902
903eval { ${^TAINT} = 0 };
904ok( ${^TAINT}, '$^TAINT is not assignable' );
905ok( $@ =~ /^Modification of a read-only value attempted/,
c212f17f 906 'Assigning to ${^TAINT} fails' );
7c36658b 907
e08e52cf
AMS
908{
909 # bug 20011111.105
910
911 my $re1 = qr/x$TAINT/;
09f04786 912 test tainted $re1;
e08e52cf
AMS
913
914 my $re2 = qr/^$re1\z/;
09f04786 915 test tainted $re2;
e08e52cf
AMS
916
917 my $re3 = "$re2";
09f04786 918 test tainted $re3;
e08e52cf 919}
52a55424 920
09f04786
MS
921SKIP: {
922 skip "system {} has different semantics on Win32", 1 if $Is_MSWin32;
923
52a55424
RG
924 # bug 20010221.005
925 local $ENV{PATH} .= $TAINT;
926 eval { system { "echo" } "/arg0", "arg1" };
09f04786 927 test $@ =~ /^Insecure \$ENV/;
52a55424 928}
09f04786
MS
929
930TODO: {
931 todo_skip 'tainted %ENV warning occludes tainted arguments warning', 22
932 if $Is_VMS;
933
934 # bug 20020208.005 plus some single arg exec/system extras
06bd1802 935 my $err = qr/^Insecure dependency/ ;
09f04786
MS
936 test !eval { exec $TAINT, $TAINT }, 'exec';
937 test $@ =~ $err, $@;
938 test !eval { exec $TAINT $TAINT }, 'exec';
939 test $@ =~ $err, $@;
940 test !eval { exec $TAINT $TAINT, $TAINT }, 'exec';
941 test $@ =~ $err, $@;
942 test !eval { exec $TAINT 'notaint' }, 'exec';
943 test $@ =~ $err, $@;
944 test !eval { exec {'notaint'} $TAINT }, 'exec';
945 test $@ =~ $err, $@;
946
947 test !eval { system $TAINT, $TAINT }, 'system';
948 test $@ =~ $err, $@;
949 test !eval { system $TAINT $TAINT }, 'system';
950 test $@ =~ $err, $@;
951 test !eval { system $TAINT $TAINT, $TAINT }, 'system';
952 test $@ =~ $err, $@;
953 test !eval { system $TAINT 'notaint' }, 'system';
954 test $@ =~ $err, $@;
955 test !eval { system {'notaint'} $TAINT }, 'system';
956 test $@ =~ $err, $@;
957
958 eval {
959 no warnings;
960 system("lskdfj does not exist","with","args");
961 };
962 test !$@;
963
964 SKIP: {
965 skip "no exec() on MacOS Classic" if $Is_MacOS;
966
967 eval {
968 no warnings;
969 exec("lskdfj does not exist","with","args");
970 };
971 test !$@;
63c6dcc1 972 }
6c8794e1
JH
973
974 # If you add tests here update also the above skip block for VMS.
bbd7eb8a 975}
a8c7c11a
HS
976
977{
978 # [ID 20020704.001] taint propagation failure
979 use re 'taint';
980 $TAINT =~ /(.*)/;
09f04786 981 test tainted(my $foo = $1);
a8c7c11a 982}
7b756e0a
RGS
983
984{
c038024b
RGS
985 # [perl #24291] this used to dump core
986 our %nonmagicalenv = ( PATH => "util" );
7b756e0a
RGS
987 local *ENV = \%nonmagicalenv;
988 eval { system("lskdfj"); };
09f04786 989 test $@ =~ /^%ENV is aliased to another variable while running with -T switch/;
c038024b 990 local *ENV = *nonmagicalenv;
7b756e0a 991 eval { system("lskdfj"); };
09f04786 992 test $@ =~ /^%ENV is aliased to %nonmagicalenv while running with -T switch/;
7b756e0a 993}
0b4182de
RD
994{
995 # [perl #24248]
996 $TAINT =~ /(.*)/;
09f04786 997 test !tainted($1);
0b4182de 998 my $notaint = $1;
09f04786 999 test !tainted($notaint);
0b4182de
RD
1000
1001 my $l;
1002 $notaint =~ /($notaint)/;
1003 $l = $1;
09f04786
MS
1004 test !tainted($1);
1005 test !tainted($l);
0b4182de
RD
1006 $notaint =~ /($TAINT)/;
1007 $l = $1;
09f04786
MS
1008 test tainted($1);
1009 test tainted($l);
0b4182de
RD
1010
1011 $TAINT =~ /($notaint)/;
1012 $l = $1;
09f04786
MS
1013 test !tainted($1);
1014 test !tainted($l);
0b4182de
RD
1015 $TAINT =~ /($TAINT)/;
1016 $l = $1;
09f04786
MS
1017 test tainted($1);
1018 test tainted($l);
0b4182de
RD
1019
1020 my $r;
1021 ($r = $TAINT) =~ /($notaint)/;
09f04786 1022 test !tainted($1);
0b4182de 1023 ($r = $TAINT) =~ /($TAINT)/;
09f04786 1024 test tainted($1);
3511154c
DM
1025
1026 # [perl #24674]
1027 # accessing $^O shoudn't taint it as a side-effect;
1028 # assigning tainted data to it is now an error
1029
09f04786 1030 test !tainted($^O);
3511154c 1031 if (!$^X) { } elsif ($^O eq 'bar') { }
09f04786 1032 test !tainted($^O);
3511154c 1033 eval '$^O = $^X';
09f04786 1034 test $@ =~ /Insecure dependency in/;
0b4182de 1035}
23634c10
AL
1036
1037EFFECTIVELY_CONSTANTS: {
1038 my $tainted_number = 12 + $TAINT0;
09f04786 1039 test tainted( $tainted_number );
23634c10
AL
1040
1041 # Even though it's always 0, it's still tainted
1042 my $tainted_product = $tainted_number * 0;
09f04786
MS
1043 test tainted( $tainted_product );
1044 test $tainted_product == 0;
23634c10
AL
1045}
1046
1047TERNARY_CONDITIONALS: {
1048 my $tainted_true = $TAINT . "blah blah blah";
1049 my $tainted_false = $TAINT0;
09f04786
MS
1050 test tainted( $tainted_true );
1051 test tainted( $tainted_false );
23634c10
AL
1052
1053 my $result = $tainted_true ? "True" : "False";
09f04786
MS
1054 test $result eq "True";
1055 test !tainted( $result );
23634c10
AL
1056
1057 $result = $tainted_false ? "True" : "False";
09f04786
MS
1058 test $result eq "False";
1059 test !tainted( $result );
23634c10
AL
1060
1061 my $untainted_whatever = "The Fabulous Johnny Cash";
1062 my $tainted_whatever = "Soft Cell" . $TAINT;
1063
1064 $result = $tainted_true ? $tainted_whatever : $untainted_whatever;
09f04786
MS
1065 test $result eq "Soft Cell";
1066 test tainted( $result );
23634c10
AL
1067
1068 $result = $tainted_false ? $tainted_whatever : $untainted_whatever;
09f04786
MS
1069 test $result eq "The Fabulous Johnny Cash";
1070 test !tainted( $result );
23634c10 1071}
65814f21
MS
1072
1073{
1074 # rt.perl.org 5900 $1 remains tainted if...
1075 # 1) The regular expression contains a scalar variable AND
1076 # 2) The regular expression appears in an elsif clause
1077
1078 my $foo = "abcdefghi" . $TAINT;
1079
1080 my $valid_chars = 'a-z';
1081 if ( $foo eq '' ) {
1082 }
1083 elsif ( $foo =~ /([$valid_chars]+)/o ) {
1084 test not tainted $1;
1085 }
1086
1087 if ( $foo eq '' ) {
1088 }
1089 elsif ( my @bar = $foo =~ /([$valid_chars]+)/o ) {
1090 test not any_tainted @bar;
1091 }
1092}
0a9c116b
DM
1093
1094# at scope exit, a restored localised value should have its old
1095# taint status, not the taint status of the current statement
1096
1097{
1098 our $x99 = $^X;
1099 test tainted $x99;
1100
1101 $x99 = '';
1102 test not tainted $x99;
1103
1104 my $c = do { local $x99; $^X };
1105 test not tainted $x99;
1106}
1107{
1108 our $x99 = $^X;
1109 test tainted $x99;
1110
1111 my $c = do { local $x99; '' };
1112 test tainted $x99;
1113}
1114
27cc343c
DM
1115# an mg_get of a tainted value during localization shouldn't taint the
1116# statement
1117
1118{
1119 eval { local $0, eval '1' };
1120 test $@ eq '';
1121}
e26a4975
DM
1122
1123# [perl #8262] //g loops infinitely on tainted data
1124
1125{
1126 my @a;
c7dd0d64 1127 local $::TODO = 1;
e26a4975
DM
1128 $a[0] = $^X;
1129 my $i = 0;
1130 while($a[0]=~ m/(.)/g ) {
1131 last if $i++ > 10000;
1132 }
86f12da2 1133 cmp_ok $i, '<', 10000, "infinite m//g";
e26a4975 1134}
0aa395f8
NC
1135
1136SKIP:
1137{
1138 my $got_dualvar;
1139 eval 'use Scalar::Util "dualvar"; $got_dualvar++';
1140 skip "No Scalar::Util::dualvar" unless $got_dualvar;
1141 my $a = Scalar::Util::dualvar(3, $^X);
1142 my $b = $a + 5;
1143 is ($b, 8, "Arithmetic on tainted dualvars works");
1144}
f27977c3
MH
1145
1146# opening '|-' should not trigger $ENV{PATH} check
1147
1148{
1149 SKIP: {
1150 skip "fork() is not available", 3 unless $Config{'d_fork'};
b4fda7a3
SP
1151 skip "opening |- is not stable on threaded OpenBSD with taint", 3
1152 if $Config{useithreads} && $Is_OpenBSD;
f27977c3
MH
1153
1154 $ENV{'PATH'} = $TAINT;
1155 local $SIG{'PIPE'} = 'IGNORE';
1156 eval {
1157 my $pid = open my $pipe, '|-';
1158 if (!defined $pid) {
1159 die "open failed: $!";
1160 }
1161 if (!$pid) {
1162 kill 'KILL', $$; # child suicide
1163 }
1164 close $pipe;
1165 };
1166 test $@ !~ /Insecure \$ENV/, 'fork triggers %ENV check';
1167 test $@ eq '', 'pipe/fork/open/close failed';
1168 eval {
1169 open my $pipe, "|$Invoke_Perl -e 1";
1170 close $pipe;
1171 };
1172 test $@ =~ /Insecure \$ENV/, 'popen neglects %ENV check';
1173 }
1174}
5d121f7f
RD
1175
1176{
1177 package AUTOLOAD_TAINT;
1178 sub AUTOLOAD {
1179 our $AUTOLOAD;
1180 return if $AUTOLOAD =~ /DESTROY/;
1181 if ($AUTOLOAD =~ /untainted/) {
1182 main::ok(!main::tainted($AUTOLOAD), '$AUTOLOAD can be untainted');
1183 } else {
1184 main::ok(main::tainted($AUTOLOAD), '$AUTOLOAD can be tainted');
1185 }
1186 }
1187
1188 package main;
1189 my $o = bless [], 'AUTOLOAD_TAINT';
1190 $o->$TAINT;
1191 $o->untainted;
1192}
1193
20ee07fb
RGS
1194{
1195 # tests for tainted format in s?printf
1196 eval { printf($TAINT . "# %s\n", "foo") };
1197 like($@, qr/^Insecure dependency in printf/, q/printf doesn't like tainted formats/);
1198 eval { printf("# %s\n", $TAINT . "foo") };
1199 ok(!$@, q/printf accepts other tainted args/);
1200 eval { sprintf($TAINT . "# %s\n", "foo") };
1201 like($@, qr/^Insecure dependency in sprintf/, q/sprintf doesn't like tainted formats/);
1202 eval { sprintf("# %s\n", $TAINT . "foo") };
1203 ok(!$@, q/sprintf accepts other tainted args/);
1204}
085bde85
NC
1205
1206{
1207 # 40708
1208 my $n = 7e9;
1209 8e9 - $n;
1210
1211 my $val = $n;
1212 is ($val, '7000000000', 'Assignment to untainted variable');
1213 $val = $TAINT;
1214 $val = $n;
1215 is ($val, '7000000000', 'Assignment to tainted variable');
1216}