| 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 |
| 6 | # tests that I've missed here, please add them. But this is |
| 7 | # better than having no tests at all, right? |
| 8 | # |
| 9 | |
| 10 | BEGIN { |
| 11 | chdir 't' if -d 't'; |
| 12 | @INC = '../lib'; |
| 13 | } |
| 14 | |
| 15 | use strict; |
| 16 | use Config; |
| 17 | use File::Spec::Functions; |
| 18 | |
| 19 | my $test = 177; |
| 20 | sub ok ($;$) { |
| 21 | my($ok, $name) = @_; |
| 22 | |
| 23 | # You have to do it this way or VMS will get confused. |
| 24 | print $ok ? "ok $test - $name\n" : "not ok $test - $name\n"; |
| 25 | |
| 26 | printf "# Failed test at line %d\n", (caller)[2] unless $ok; |
| 27 | |
| 28 | $test++; |
| 29 | return $ok; |
| 30 | } |
| 31 | |
| 32 | |
| 33 | $| = 1; |
| 34 | |
| 35 | use vars qw($ipcsysv); # did we manage to load IPC::SysV? |
| 36 | |
| 37 | BEGIN { |
| 38 | if ($^O eq 'VMS' && !defined($Config{d_setenv})) { |
| 39 | $ENV{PATH} = $ENV{PATH}; |
| 40 | $ENV{TERM} = $ENV{TERM} ne ''? $ENV{TERM} : 'dummy'; |
| 41 | } |
| 42 | if ($Config{'extensions'} =~ /\bIPC\/SysV\b/ |
| 43 | && ($Config{d_shm} || $Config{d_msg})) { |
| 44 | eval { require IPC::SysV }; |
| 45 | unless ($@) { |
| 46 | $ipcsysv++; |
| 47 | IPC::SysV->import(qw(IPC_PRIVATE IPC_RMID IPC_CREAT S_IRWXU)); |
| 48 | } |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | my $Is_MacOS = $^O eq 'MacOS'; |
| 53 | my $Is_VMS = $^O eq 'VMS'; |
| 54 | my $Is_MSWin32 = $^O eq 'MSWin32'; |
| 55 | my $Is_NetWare = $^O eq 'NetWare'; |
| 56 | my $Is_Dos = $^O eq 'dos'; |
| 57 | my $Is_Cygwin = $^O eq 'cygwin'; |
| 58 | my $Invoke_Perl = $Is_VMS ? 'MCR Sys$Disk:[]Perl.' : |
| 59 | ($Is_MSWin32 ? '.\perl' : |
| 60 | $Is_MacOS ? ':perl' : |
| 61 | ($Is_NetWare ? 'perl' : './perl')); |
| 62 | my @MoreEnv = qw/IFS CDPATH ENV BASH_ENV/; |
| 63 | |
| 64 | if ($Is_VMS) { |
| 65 | my (%old, $x); |
| 66 | for $x ('DCL$PATH', @MoreEnv) { |
| 67 | ($old{$x}) = $ENV{$x} =~ /^(.*)$/ if exists $ENV{$x}; |
| 68 | } |
| 69 | eval <<EndOfCleanup; |
| 70 | END { |
| 71 | \$ENV{PATH} = '' if $Config{d_setenv}; |
| 72 | warn "# Note: logical name 'PATH' may have been deleted\n"; |
| 73 | \@ENV{keys %old} = values %old; |
| 74 | } |
| 75 | EndOfCleanup |
| 76 | } |
| 77 | |
| 78 | # Sources of taint: |
| 79 | # The empty tainted value, for tainting strings |
| 80 | my $TAINT = substr($^X, 0, 0); |
| 81 | # A tainted zero, useful for tainting numbers |
| 82 | my $TAINT0 = 0 + $TAINT; |
| 83 | |
| 84 | # This taints each argument passed. All must be lvalues. |
| 85 | # Side effect: It also stringifies them. :-( |
| 86 | sub taint_these (@) { |
| 87 | for (@_) { $_ .= $TAINT } |
| 88 | } |
| 89 | |
| 90 | # How to identify taint when you see it |
| 91 | sub any_tainted (@) { |
| 92 | not eval { join("",@_), kill 0; 1 }; |
| 93 | } |
| 94 | sub tainted ($) { |
| 95 | any_tainted @_; |
| 96 | } |
| 97 | sub all_tainted (@) { |
| 98 | for (@_) { return 0 unless tainted $_ } |
| 99 | 1; |
| 100 | } |
| 101 | |
| 102 | sub test ($$;$) { |
| 103 | my($serial, $boolean, $diag) = @_; |
| 104 | if ($boolean) { |
| 105 | print "ok $serial\n"; |
| 106 | } else { |
| 107 | print "not ok $serial\n"; |
| 108 | for (split m/^/m, $diag) { |
| 109 | print "# $_"; |
| 110 | } |
| 111 | print "\n" unless |
| 112 | $diag eq '' |
| 113 | or substr($diag, -1) eq "\n"; |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | # We need an external program to call. |
| 118 | my $ECHO = ($Is_MSWin32 ? ".\\echo$$" : $Is_MacOS ? ":echo$$" : ($Is_NetWare ? "echo$$" : "./echo$$")); |
| 119 | END { unlink $ECHO } |
| 120 | open PROG, "> $ECHO" or die "Can't create $ECHO: $!"; |
| 121 | print PROG 'print "@ARGV\n"', "\n"; |
| 122 | close PROG; |
| 123 | my $echo = "$Invoke_Perl $ECHO"; |
| 124 | |
| 125 | my $TEST = catfile(curdir(), 'TEST'); |
| 126 | |
| 127 | print "1..203\n"; |
| 128 | |
| 129 | # First, let's make sure that Perl is checking the dangerous |
| 130 | # environment variables. Maybe they aren't set yet, so we'll |
| 131 | # taint them ourselves. |
| 132 | { |
| 133 | $ENV{'DCL$PATH'} = '' if $Is_VMS; |
| 134 | |
| 135 | $ENV{PATH} = ''; |
| 136 | delete @ENV{@MoreEnv}; |
| 137 | $ENV{TERM} = 'dumb'; |
| 138 | |
| 139 | if ($Is_Cygwin && ! -f 'cygwin1.dll') { |
| 140 | system("/usr/bin/cp /usr/bin/cygwin1.dll .") && |
| 141 | die "$0: failed to cp cygwin1.dll: $!\n"; |
| 142 | END { unlink "cygwin1.dll" } # yes, done for all platforms... |
| 143 | } |
| 144 | |
| 145 | test 1, eval { `$echo 1` } eq "1\n"; |
| 146 | |
| 147 | if ($Is_MSWin32 || $Is_NetWare || $Is_VMS || $Is_Dos || $Is_MacOS) { |
| 148 | print "# Environment tainting tests skipped\n"; |
| 149 | for (2..5) { print "ok $_\n" } |
| 150 | } |
| 151 | else { |
| 152 | my @vars = ('PATH', @MoreEnv); |
| 153 | while (my $v = $vars[0]) { |
| 154 | local $ENV{$v} = $TAINT; |
| 155 | last if eval { `$echo 1` }; |
| 156 | last unless $@ =~ /^Insecure \$ENV{$v}/; |
| 157 | shift @vars; |
| 158 | } |
| 159 | test 2, !@vars, "\$$vars[0]"; |
| 160 | |
| 161 | # tainted $TERM is unsafe only if it contains metachars |
| 162 | local $ENV{TERM}; |
| 163 | $ENV{TERM} = 'e=mc2'; |
| 164 | test 3, eval { `$echo 1` } eq "1\n"; |
| 165 | $ENV{TERM} = 'e=mc2' . $TAINT; |
| 166 | test 4, eval { `$echo 1` } eq ''; |
| 167 | test 5, $@ =~ /^Insecure \$ENV{TERM}/, $@; |
| 168 | } |
| 169 | |
| 170 | my $tmp; |
| 171 | if ($^O eq 'os2' || $^O eq 'amigaos' || $Is_MSWin32 || $Is_NetWare || $Is_Dos) { |
| 172 | print "# all directories are writeable\n"; |
| 173 | } |
| 174 | else { |
| 175 | $tmp = (grep { defined and -d and (stat _)[2] & 2 } |
| 176 | qw(sys$scratch /tmp /var/tmp /usr/tmp), |
| 177 | @ENV{qw(TMP TEMP)})[0] |
| 178 | or print "# can't find world-writeable directory to test PATH\n"; |
| 179 | } |
| 180 | |
| 181 | if ($tmp) { |
| 182 | local $ENV{PATH} = $tmp; |
| 183 | test 6, eval { `$echo 1` } eq ''; |
| 184 | test 7, $@ =~ /^Insecure directory in \$ENV{PATH}/, $@; |
| 185 | } |
| 186 | else { |
| 187 | for (6..7) { print "ok $_ # Skipped: all directories are writeable\n" } |
| 188 | } |
| 189 | |
| 190 | if ($Is_VMS) { |
| 191 | $ENV{'DCL$PATH'} = $TAINT; |
| 192 | test 8, eval { `$echo 1` } eq ''; |
| 193 | test 9, $@ =~ /^Insecure \$ENV{DCL\$PATH}/, $@; |
| 194 | if ($tmp) { |
| 195 | $ENV{'DCL$PATH'} = $tmp; |
| 196 | test 10, eval { `$echo 1` } eq ''; |
| 197 | test 11, $@ =~ /^Insecure directory in \$ENV{DCL\$PATH}/, $@; |
| 198 | } |
| 199 | else { |
| 200 | for (10..11) { print "ok $_ # Skipped: can't find world-writeable directory to test DCL\$PATH\n" } |
| 201 | } |
| 202 | $ENV{'DCL$PATH'} = ''; |
| 203 | } |
| 204 | else { |
| 205 | for (8..11) { print "ok $_ # Skipped: This is not VMS\n"; } |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | # Let's see that we can taint and untaint as needed. |
| 210 | { |
| 211 | my $foo = $TAINT; |
| 212 | test 12, tainted $foo; |
| 213 | |
| 214 | # That was a sanity check. If it failed, stop the insanity! |
| 215 | die "Taint checks don't seem to be enabled" unless tainted $foo; |
| 216 | |
| 217 | $foo = "foo"; |
| 218 | test 13, not tainted $foo; |
| 219 | |
| 220 | taint_these($foo); |
| 221 | test 14, tainted $foo; |
| 222 | |
| 223 | my @list = 1..10; |
| 224 | test 15, not any_tainted @list; |
| 225 | taint_these @list[1,3,5,7,9]; |
| 226 | test 16, any_tainted @list; |
| 227 | test 17, all_tainted @list[1,3,5,7,9]; |
| 228 | test 18, not any_tainted @list[0,2,4,6,8]; |
| 229 | |
| 230 | ($foo) = $foo =~ /(.+)/; |
| 231 | test 19, not tainted $foo; |
| 232 | |
| 233 | $foo = $1 if ('bar' . $TAINT) =~ /(.+)/; |
| 234 | test 20, not tainted $foo; |
| 235 | test 21, $foo eq 'bar'; |
| 236 | |
| 237 | { |
| 238 | use re 'taint'; |
| 239 | |
| 240 | ($foo) = ('bar' . $TAINT) =~ /(.+)/; |
| 241 | test 22, tainted $foo; |
| 242 | test 23, $foo eq 'bar'; |
| 243 | |
| 244 | $foo = $1 if ('bar' . $TAINT) =~ /(.+)/; |
| 245 | test 24, tainted $foo; |
| 246 | test 25, $foo eq 'bar'; |
| 247 | } |
| 248 | |
| 249 | $foo = $1 if 'bar' =~ /(.+)$TAINT/; |
| 250 | test 26, tainted $foo; |
| 251 | test 27, $foo eq 'bar'; |
| 252 | |
| 253 | my $pi = 4 * atan2(1,1) + $TAINT0; |
| 254 | test 28, tainted $pi; |
| 255 | |
| 256 | ($pi) = $pi =~ /(\d+\.\d+)/; |
| 257 | test 29, not tainted $pi; |
| 258 | test 30, sprintf("%.5f", $pi) eq '3.14159'; |
| 259 | } |
| 260 | |
| 261 | # How about command-line arguments? The problem is that we don't |
| 262 | # always get some, so we'll run another process with some. |
| 263 | SKIP: { |
| 264 | my $arg = catfile(curdir(), "arg$$"); |
| 265 | open PROG, "> $arg" or die "Can't create $arg: $!"; |
| 266 | print PROG q{ |
| 267 | eval { join('', @ARGV), kill 0 }; |
| 268 | exit 0 if $@ =~ /^Insecure dependency/; |
| 269 | print "# Oops: \$@ was [$@]\n"; |
| 270 | exit 1; |
| 271 | }; |
| 272 | close PROG; |
| 273 | print `$Invoke_Perl "-T" $arg and some suspect arguments`; |
| 274 | test 31, !$?, "Exited with status $?"; |
| 275 | unlink $arg; |
| 276 | } |
| 277 | |
| 278 | # Reading from a file should be tainted |
| 279 | { |
| 280 | test 32, open(FILE, $TEST), "Couldn't open '$TEST': $!"; |
| 281 | |
| 282 | my $block; |
| 283 | sysread(FILE, $block, 100); |
| 284 | my $line = <FILE>; |
| 285 | close FILE; |
| 286 | test 33, tainted $block; |
| 287 | test 34, tainted $line; |
| 288 | } |
| 289 | |
| 290 | # Globs should be forbidden, except under VMS, |
| 291 | # which doesn't spawn an external program. |
| 292 | if (1 # built-in glob |
| 293 | or $Is_VMS) { |
| 294 | for (35..36) { print "ok $_\n"; } |
| 295 | } |
| 296 | else { |
| 297 | my @globs = eval { <*> }; |
| 298 | test 35, @globs == 0 && $@ =~ /^Insecure dependency/; |
| 299 | |
| 300 | @globs = eval { glob '*' }; |
| 301 | test 36, @globs == 0 && $@ =~ /^Insecure dependency/; |
| 302 | } |
| 303 | |
| 304 | # Output of commands should be tainted |
| 305 | { |
| 306 | my $foo = `$echo abc`; |
| 307 | test 37, tainted $foo; |
| 308 | } |
| 309 | |
| 310 | # Certain system variables should be tainted |
| 311 | { |
| 312 | test 38, all_tainted $^X, $0; |
| 313 | } |
| 314 | |
| 315 | # Results of matching should all be untainted |
| 316 | { |
| 317 | my $foo = "abcdefghi" . $TAINT; |
| 318 | test 39, tainted $foo; |
| 319 | |
| 320 | $foo =~ /def/; |
| 321 | test 40, not any_tainted $`, $&, $'; |
| 322 | |
| 323 | $foo =~ /(...)(...)(...)/; |
| 324 | test 41, not any_tainted $1, $2, $3, $+; |
| 325 | |
| 326 | my @bar = $foo =~ /(...)(...)(...)/; |
| 327 | test 42, not any_tainted @bar; |
| 328 | |
| 329 | test 43, tainted $foo; # $foo should still be tainted! |
| 330 | test 44, $foo eq "abcdefghi"; |
| 331 | } |
| 332 | |
| 333 | # Operations which affect files can't use tainted data. |
| 334 | { |
| 335 | test 45, eval { chmod 0, $TAINT } eq '', 'chmod'; |
| 336 | test 46, $@ =~ /^Insecure dependency/, $@; |
| 337 | |
| 338 | # There is no feature test in $Config{} for truncate, |
| 339 | # so we allow for the possibility that it's missing. |
| 340 | test 47, eval { truncate 'NoSuChFiLe', $TAINT0 } eq '', 'truncate'; |
| 341 | test 48, $@ =~ /^(?:Insecure dependency|truncate not implemented)/, $@; |
| 342 | |
| 343 | test 49, eval { rename '', $TAINT } eq '', 'rename'; |
| 344 | test 50, $@ =~ /^Insecure dependency/, $@; |
| 345 | |
| 346 | test 51, eval { unlink $TAINT } eq '', 'unlink'; |
| 347 | test 52, $@ =~ /^Insecure dependency/, $@; |
| 348 | |
| 349 | test 53, eval { utime $TAINT } eq '', 'utime'; |
| 350 | test 54, $@ =~ /^Insecure dependency/, $@; |
| 351 | |
| 352 | if ($Config{d_chown}) { |
| 353 | test 55, eval { chown -1, -1, $TAINT } eq '', 'chown'; |
| 354 | test 56, $@ =~ /^Insecure dependency/, $@; |
| 355 | } |
| 356 | else { |
| 357 | for (55..56) { print "ok $_ # Skipped: chown() is not available\n" } |
| 358 | } |
| 359 | |
| 360 | if ($Config{d_link}) { |
| 361 | test 57, eval { link $TAINT, '' } eq '', 'link'; |
| 362 | test 58, $@ =~ /^Insecure dependency/, $@; |
| 363 | } |
| 364 | else { |
| 365 | for (57..58) { print "ok $_ # Skipped: link() is not available\n" } |
| 366 | } |
| 367 | |
| 368 | if ($Config{d_symlink}) { |
| 369 | test 59, eval { symlink $TAINT, '' } eq '', 'symlink'; |
| 370 | test 60, $@ =~ /^Insecure dependency/, $@; |
| 371 | } |
| 372 | else { |
| 373 | for (59..60) { print "ok $_ # Skipped: symlink() is not available\n" } |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | # Operations which affect directories can't use tainted data. |
| 378 | { |
| 379 | test 61, eval { mkdir $TAINT0, $TAINT } eq '', 'mkdir'; |
| 380 | test 62, $@ =~ /^Insecure dependency/, $@; |
| 381 | |
| 382 | test 63, eval { rmdir $TAINT } eq '', 'rmdir'; |
| 383 | test 64, $@ =~ /^Insecure dependency/, $@; |
| 384 | |
| 385 | test 65, eval { chdir $TAINT } eq '', 'chdir'; |
| 386 | test 66, $@ =~ /^Insecure dependency/, $@; |
| 387 | |
| 388 | if ($Config{d_chroot}) { |
| 389 | test 67, eval { chroot $TAINT } eq '', 'chroot'; |
| 390 | test 68, $@ =~ /^Insecure dependency/, $@; |
| 391 | } |
| 392 | else { |
| 393 | for (67..68) { print "ok $_ # Skipped: chroot() is not available\n" } |
| 394 | } |
| 395 | } |
| 396 | |
| 397 | # Some operations using files can't use tainted data. |
| 398 | { |
| 399 | my $foo = "imaginary library" . $TAINT; |
| 400 | test 69, eval { require $foo } eq '', 'require'; |
| 401 | test 70, $@ =~ /^Insecure dependency/, $@; |
| 402 | |
| 403 | my $filename = "./taintB$$"; # NB: $filename isn't tainted! |
| 404 | END { unlink $filename if defined $filename } |
| 405 | $foo = $filename . $TAINT; |
| 406 | unlink $filename; # in any case |
| 407 | |
| 408 | test 71, eval { open FOO, $foo } eq '', 'open for read'; |
| 409 | test 72, $@ eq '', $@; # NB: This should be allowed |
| 410 | |
| 411 | # Try first new style but allow also old style. |
| 412 | # We do not want the whole taint.t to fail |
| 413 | # just because Errno possibly failing. |
| 414 | test 73, eval('$!{ENOENT}') || |
| 415 | $! == 2 || # File not found |
| 416 | ($Is_Dos && $! == 22) || |
| 417 | ($^O eq 'mint' && $! == 33); |
| 418 | |
| 419 | test 74, eval { open FOO, "> $foo" } eq '', 'open for write'; |
| 420 | test 75, $@ =~ /^Insecure dependency/, $@; |
| 421 | } |
| 422 | |
| 423 | # Commands to the system can't use tainted data |
| 424 | { |
| 425 | my $foo = $TAINT; |
| 426 | |
| 427 | if ($^O eq 'amigaos') { |
| 428 | for (76..79) { print "ok $_ # Skipped: open('|') is not available\n" } |
| 429 | } |
| 430 | else { |
| 431 | test 76, eval { open FOO, "| x$foo" } eq '', 'popen to'; |
| 432 | test 77, $@ =~ /^Insecure dependency/, $@; |
| 433 | |
| 434 | test 78, eval { open FOO, "x$foo |" } eq '', 'popen from'; |
| 435 | test 79, $@ =~ /^Insecure dependency/, $@; |
| 436 | } |
| 437 | |
| 438 | test 80, eval { exec $TAINT } eq '', 'exec'; |
| 439 | test 81, $@ =~ /^Insecure dependency/, $@; |
| 440 | |
| 441 | test 82, eval { system $TAINT } eq '', 'system'; |
| 442 | test 83, $@ =~ /^Insecure dependency/, $@; |
| 443 | |
| 444 | $foo = "*"; |
| 445 | taint_these $foo; |
| 446 | |
| 447 | test 84, eval { `$echo 1$foo` } eq '', 'backticks'; |
| 448 | test 85, $@ =~ /^Insecure dependency/, $@; |
| 449 | |
| 450 | if ($Is_VMS) { # wildcard expansion doesn't invoke shell, so is safe |
| 451 | test 86, join('', eval { glob $foo } ) ne '', 'globbing'; |
| 452 | test 87, $@ eq '', $@; |
| 453 | } |
| 454 | else { |
| 455 | for (86..87) { print "ok $_ # Skipped: this is not VMS\n"; } |
| 456 | } |
| 457 | } |
| 458 | |
| 459 | # Operations which affect processes can't use tainted data. |
| 460 | { |
| 461 | test 88, eval { kill 0, $TAINT } eq '', 'kill'; |
| 462 | test 89, $@ =~ /^Insecure dependency/, $@; |
| 463 | |
| 464 | if ($Config{d_setpgrp}) { |
| 465 | test 90, eval { setpgrp 0, $TAINT } eq '', 'setpgrp'; |
| 466 | test 91, $@ =~ /^Insecure dependency/, $@; |
| 467 | } |
| 468 | else { |
| 469 | for (90..91) { print "ok $_ # Skipped: setpgrp() is not available\n" } |
| 470 | } |
| 471 | |
| 472 | if ($Config{d_setprior}) { |
| 473 | test 92, eval { setpriority 0, $TAINT, $TAINT } eq '', 'setpriority'; |
| 474 | test 93, $@ =~ /^Insecure dependency/, $@; |
| 475 | } |
| 476 | else { |
| 477 | for (92..93) { print "ok $_ # Skipped: setpriority() is not available\n" } |
| 478 | } |
| 479 | } |
| 480 | |
| 481 | # Some miscellaneous operations can't use tainted data. |
| 482 | { |
| 483 | if ($Config{d_syscall}) { |
| 484 | test 94, eval { syscall $TAINT } eq '', 'syscall'; |
| 485 | test 95, $@ =~ /^Insecure dependency/, $@; |
| 486 | } |
| 487 | else { |
| 488 | for (94..95) { print "ok $_ # Skipped: syscall() is not available\n" } |
| 489 | } |
| 490 | |
| 491 | { |
| 492 | my $foo = "x" x 979; |
| 493 | taint_these $foo; |
| 494 | local *FOO; |
| 495 | my $temp = "./taintC$$"; |
| 496 | END { unlink $temp } |
| 497 | test 96, open(FOO, "> $temp"), "Couldn't open $temp for write: $!"; |
| 498 | |
| 499 | test 97, eval { ioctl FOO, $TAINT, $foo } eq '', 'ioctl'; |
| 500 | test 98, $@ =~ /^Insecure dependency/, $@; |
| 501 | |
| 502 | if ($Config{d_fcntl}) { |
| 503 | test 99, eval { fcntl FOO, $TAINT, $foo } eq '', 'fcntl'; |
| 504 | test 100, $@ =~ /^Insecure dependency/, $@; |
| 505 | } |
| 506 | else { |
| 507 | for (99..100) { print "ok $_ # Skipped: fcntl() is not available\n" } |
| 508 | } |
| 509 | |
| 510 | close FOO; |
| 511 | } |
| 512 | } |
| 513 | |
| 514 | # Some tests involving references |
| 515 | { |
| 516 | my $foo = 'abc' . $TAINT; |
| 517 | my $fooref = \$foo; |
| 518 | test 101, not tainted $fooref; |
| 519 | test 102, tainted $$fooref; |
| 520 | test 103, tainted $foo; |
| 521 | } |
| 522 | |
| 523 | # Some tests involving assignment |
| 524 | { |
| 525 | my $foo = $TAINT0; |
| 526 | my $bar = $foo; |
| 527 | test 104, all_tainted $foo, $bar; |
| 528 | test 105, tainted($foo = $bar); |
| 529 | test 106, tainted($bar = $bar); |
| 530 | test 107, tainted($bar += $bar); |
| 531 | test 108, tainted($bar -= $bar); |
| 532 | test 109, tainted($bar *= $bar); |
| 533 | test 110, tainted($bar++); |
| 534 | test 111, tainted($bar /= $bar); |
| 535 | test 112, tainted($bar += 0); |
| 536 | test 113, tainted($bar -= 2); |
| 537 | test 114, tainted($bar *= -1); |
| 538 | test 115, tainted($bar /= 1); |
| 539 | test 116, tainted($bar--); |
| 540 | test 117, $bar == 0; |
| 541 | } |
| 542 | |
| 543 | # Test assignment and return of lists |
| 544 | { |
| 545 | my @foo = ("A", "tainted" . $TAINT, "B"); |
| 546 | test 118, not tainted $foo[0]; |
| 547 | test 119, tainted $foo[1]; |
| 548 | test 120, not tainted $foo[2]; |
| 549 | my @bar = @foo; |
| 550 | test 121, not tainted $bar[0]; |
| 551 | test 122, tainted $bar[1]; |
| 552 | test 123, not tainted $bar[2]; |
| 553 | my @baz = eval { "A", "tainted" . $TAINT, "B" }; |
| 554 | test 124, not tainted $baz[0]; |
| 555 | test 125, tainted $baz[1]; |
| 556 | test 126, not tainted $baz[2]; |
| 557 | my @plugh = eval q[ "A", "tainted" . $TAINT, "B" ]; |
| 558 | test 127, not tainted $plugh[0]; |
| 559 | test 128, tainted $plugh[1]; |
| 560 | test 129, not tainted $plugh[2]; |
| 561 | my $nautilus = sub { "A", "tainted" . $TAINT, "B" }; |
| 562 | test 130, not tainted ((&$nautilus)[0]); |
| 563 | test 131, tainted ((&$nautilus)[1]); |
| 564 | test 132, not tainted ((&$nautilus)[2]); |
| 565 | my @xyzzy = &$nautilus; |
| 566 | test 133, not tainted $xyzzy[0]; |
| 567 | test 134, tainted $xyzzy[1]; |
| 568 | test 135, not tainted $xyzzy[2]; |
| 569 | my $red_october = sub { return "A", "tainted" . $TAINT, "B" }; |
| 570 | test 136, not tainted ((&$red_october)[0]); |
| 571 | test 137, tainted ((&$red_october)[1]); |
| 572 | test 138, not tainted ((&$red_october)[2]); |
| 573 | my @corge = &$red_october; |
| 574 | test 139, not tainted $corge[0]; |
| 575 | test 140, tainted $corge[1]; |
| 576 | test 141, not tainted $corge[2]; |
| 577 | } |
| 578 | |
| 579 | # Test for system/library calls returning string data of dubious origin. |
| 580 | { |
| 581 | # No reliable %Config check for getpw* |
| 582 | if (eval { setpwent(); getpwent() }) { |
| 583 | setpwent(); |
| 584 | my @getpwent = getpwent(); |
| 585 | die "getpwent: $!\n" unless (@getpwent); |
| 586 | test 142,( not tainted $getpwent[0] |
| 587 | and tainted $getpwent[1] |
| 588 | and not tainted $getpwent[2] |
| 589 | and not tainted $getpwent[3] |
| 590 | and not tainted $getpwent[4] |
| 591 | and not tainted $getpwent[5] |
| 592 | and tainted $getpwent[6] # ge?cos |
| 593 | and not tainted $getpwent[7] |
| 594 | and tainted $getpwent[8]); # shell |
| 595 | endpwent(); |
| 596 | } else { |
| 597 | for (142) { print "ok $_ # Skipped: getpwent() is not available\n" } |
| 598 | } |
| 599 | |
| 600 | if ($Config{d_readdir}) { # pretty hard to imagine not |
| 601 | local(*D); |
| 602 | opendir(D, "op") or die "opendir: $!\n"; |
| 603 | my $readdir = readdir(D); |
| 604 | test 143, tainted $readdir; |
| 605 | closedir(OP); |
| 606 | } else { |
| 607 | for (143) { print "ok $_ # Skipped: readdir() is not available\n" } |
| 608 | } |
| 609 | |
| 610 | if ($Config{d_readlink} && $Config{d_symlink}) { |
| 611 | my $symlink = "sl$$"; |
| 612 | unlink($symlink); |
| 613 | my $sl = "/something/naughty"; |
| 614 | # it has to be a real path on Mac OS |
| 615 | $sl = MacPerl::MakePath((MacPerl::Volumes())[0]) if $Is_MacOS; |
| 616 | symlink($sl, $symlink) or die "symlink: $!\n"; |
| 617 | my $readlink = readlink($symlink); |
| 618 | test 144, tainted $readlink; |
| 619 | unlink($symlink); |
| 620 | } else { |
| 621 | for (144) { print "ok $_ # Skipped: readlink() or symlink() is not available\n"; } |
| 622 | } |
| 623 | } |
| 624 | |
| 625 | # test bitwise ops (regression bug) |
| 626 | { |
| 627 | my $why = "y"; |
| 628 | my $j = "x" | $why; |
| 629 | test 145, not tainted $j; |
| 630 | $why = $TAINT."y"; |
| 631 | $j = "x" | $why; |
| 632 | test 146, tainted $j; |
| 633 | } |
| 634 | |
| 635 | # test target of substitution (regression bug) |
| 636 | { |
| 637 | my $why = $TAINT."y"; |
| 638 | $why =~ s/y/z/; |
| 639 | test 147, tainted $why; |
| 640 | |
| 641 | my $z = "[z]"; |
| 642 | $why =~ s/$z/zee/; |
| 643 | test 148, tainted $why; |
| 644 | |
| 645 | $why =~ s/e/'-'.$$/ge; |
| 646 | test 149, tainted $why; |
| 647 | } |
| 648 | |
| 649 | # test shmread |
| 650 | { |
| 651 | unless ($ipcsysv) { |
| 652 | print "ok 150 # skipped: no IPC::SysV\n"; |
| 653 | last; |
| 654 | } |
| 655 | if ($Config{'extensions'} =~ /\bIPC\/SysV\b/ && $Config{d_shm}) { |
| 656 | no strict 'subs'; |
| 657 | my $sent = "foobar"; |
| 658 | my $rcvd; |
| 659 | my $size = 2000; |
| 660 | my $id = shmget(IPC_PRIVATE, $size, S_IRWXU); |
| 661 | |
| 662 | if (defined $id) { |
| 663 | if (shmwrite($id, $sent, 0, 60)) { |
| 664 | if (shmread($id, $rcvd, 0, 60)) { |
| 665 | substr($rcvd, index($rcvd, "\0")) = ''; |
| 666 | } else { |
| 667 | warn "# shmread failed: $!\n"; |
| 668 | } |
| 669 | } else { |
| 670 | warn "# shmwrite failed: $!\n"; |
| 671 | } |
| 672 | shmctl($id, IPC_RMID, 0) or warn "# shmctl failed: $!\n"; |
| 673 | } else { |
| 674 | warn "# shmget failed: $!\n"; |
| 675 | } |
| 676 | |
| 677 | if ($rcvd eq $sent) { |
| 678 | test 150, tainted $rcvd; |
| 679 | } else { |
| 680 | print "ok 150 # Skipped: SysV shared memory operation failed\n"; |
| 681 | } |
| 682 | } else { |
| 683 | print "ok 150 # Skipped: SysV shared memory is not available\n"; |
| 684 | } |
| 685 | } |
| 686 | |
| 687 | # test msgrcv |
| 688 | { |
| 689 | unless ($ipcsysv) { |
| 690 | print "ok 151 # skipped: no IPC::SysV\n"; |
| 691 | last; |
| 692 | } |
| 693 | if ($Config{'extensions'} =~ /\bIPC\/SysV\b/ && $Config{d_msg}) { |
| 694 | no strict 'subs'; |
| 695 | my $id = msgget(IPC_PRIVATE, IPC_CREAT | S_IRWXU); |
| 696 | |
| 697 | my $sent = "message"; |
| 698 | my $type_sent = 1234; |
| 699 | my $rcvd; |
| 700 | my $type_rcvd; |
| 701 | |
| 702 | if (defined $id) { |
| 703 | if (msgsnd($id, pack("l! a*", $type_sent, $sent), 0)) { |
| 704 | if (msgrcv($id, $rcvd, 60, 0, 0)) { |
| 705 | ($type_rcvd, $rcvd) = unpack("l! a*", $rcvd); |
| 706 | } else { |
| 707 | warn "# msgrcv failed\n"; |
| 708 | } |
| 709 | } else { |
| 710 | warn "# msgsnd failed\n"; |
| 711 | } |
| 712 | msgctl($id, IPC_RMID, 0) or warn "# msgctl failed: $!\n"; |
| 713 | } else { |
| 714 | warn "# msgget failed\n"; |
| 715 | } |
| 716 | |
| 717 | if ($rcvd eq $sent && $type_sent == $type_rcvd) { |
| 718 | test 151, tainted $rcvd; |
| 719 | } else { |
| 720 | print "ok 151 # Skipped: SysV message queue operation failed\n"; |
| 721 | } |
| 722 | } else { |
| 723 | print "ok 151 # Skipped: SysV message queues are not available\n"; |
| 724 | } |
| 725 | } |
| 726 | |
| 727 | { |
| 728 | # bug id 20001004.006 |
| 729 | |
| 730 | open IN, $TEST or warn "$0: cannot read $TEST: $!" ; |
| 731 | local $/; |
| 732 | my $a = <IN>; |
| 733 | my $b = <IN>; |
| 734 | print "not " unless tainted($a) && tainted($b) && !defined($b); |
| 735 | print "ok 152\n"; |
| 736 | close IN; |
| 737 | } |
| 738 | |
| 739 | { |
| 740 | # bug id 20001004.007 |
| 741 | |
| 742 | open IN, $TEST or warn "$0: cannot read $TEST: $!" ; |
| 743 | my $a = <IN>; |
| 744 | |
| 745 | my $c = { a => 42, |
| 746 | b => $a }; |
| 747 | print "not " unless !tainted($c->{a}) && tainted($c->{b}); |
| 748 | print "ok 153\n"; |
| 749 | |
| 750 | my $d = { a => $a, |
| 751 | b => 42 }; |
| 752 | print "not " unless tainted($d->{a}) && !tainted($d->{b}); |
| 753 | print "ok 154\n"; |
| 754 | |
| 755 | my $e = { a => 42, |
| 756 | b => { c => $a, d => 42 } }; |
| 757 | print "not " unless !tainted($e->{a}) && |
| 758 | !tainted($e->{b}) && |
| 759 | tainted($e->{b}->{c}) && |
| 760 | !tainted($e->{b}->{d}); |
| 761 | print "ok 155\n"; |
| 762 | |
| 763 | close IN; |
| 764 | } |
| 765 | |
| 766 | { |
| 767 | # bug id 20010519.003 |
| 768 | |
| 769 | BEGIN { |
| 770 | use vars qw($has_fcntl); |
| 771 | eval { require Fcntl; import Fcntl; }; |
| 772 | unless ($@) { |
| 773 | $has_fcntl = 1; |
| 774 | } |
| 775 | } |
| 776 | |
| 777 | unless ($has_fcntl) { |
| 778 | for (156..173) { |
| 779 | print "ok $_ # Skip: no Fcntl (no dynaloading?)\n"; |
| 780 | } |
| 781 | } else { |
| 782 | my $evil = "foo" . $TAINT; |
| 783 | |
| 784 | eval { sysopen(my $ro, $evil, &O_RDONLY) }; |
| 785 | test 156, $@ !~ /^Insecure dependency/, $@; |
| 786 | |
| 787 | eval { sysopen(my $wo, $evil, &O_WRONLY) }; |
| 788 | test 157, $@ =~ /^Insecure dependency/, $@; |
| 789 | |
| 790 | eval { sysopen(my $rw, $evil, &O_RDWR) }; |
| 791 | test 158, $@ =~ /^Insecure dependency/, $@; |
| 792 | |
| 793 | eval { sysopen(my $ap, $evil, &O_APPEND) }; |
| 794 | test 159, $@ =~ /^Insecure dependency/, $@; |
| 795 | |
| 796 | eval { sysopen(my $cr, $evil, &O_CREAT) }; |
| 797 | test 160, $@ =~ /^Insecure dependency/, $@; |
| 798 | |
| 799 | eval { sysopen(my $tr, $evil, &O_TRUNC) }; |
| 800 | test 161, $@ =~ /^Insecure dependency/, $@; |
| 801 | |
| 802 | eval { sysopen(my $ro, "foo", &O_RDONLY | $evil) }; |
| 803 | test 162, $@ !~ /^Insecure dependency/, $@; |
| 804 | |
| 805 | eval { sysopen(my $wo, "foo", &O_WRONLY | $evil) }; |
| 806 | test 163, $@ =~ /^Insecure dependency/, $@; |
| 807 | |
| 808 | eval { sysopen(my $rw, "foo", &O_RDWR | $evil) }; |
| 809 | test 164, $@ =~ /^Insecure dependency/, $@; |
| 810 | |
| 811 | eval { sysopen(my $ap, "foo", &O_APPEND | $evil) }; |
| 812 | test 165, $@ =~ /^Insecure dependency/, $@; |
| 813 | |
| 814 | eval { sysopen(my $cr, "foo", &O_CREAT | $evil) }; |
| 815 | test 166, $@ =~ /^Insecure dependency/, $@; |
| 816 | |
| 817 | eval { sysopen(my $tr, "foo", &O_TRUNC | $evil) }; |
| 818 | test 167, $@ =~ /^Insecure dependency/, $@; |
| 819 | |
| 820 | eval { sysopen(my $ro, "foo", &O_RDONLY, $evil) }; |
| 821 | test 168, $@ !~ /^Insecure dependency/, $@; |
| 822 | |
| 823 | eval { sysopen(my $wo, "foo", &O_WRONLY, $evil) }; |
| 824 | test 169, $@ =~ /^Insecure dependency/, $@; |
| 825 | |
| 826 | eval { sysopen(my $rw, "foo", &O_RDWR, $evil) }; |
| 827 | test 170, $@ =~ /^Insecure dependency/, $@; |
| 828 | |
| 829 | eval { sysopen(my $ap, "foo", &O_APPEND, $evil) }; |
| 830 | test 171, $@ =~ /^Insecure dependency/, $@; |
| 831 | |
| 832 | eval { sysopen(my $cr, "foo", &O_CREAT, $evil) }; |
| 833 | test 172, $@ =~ /^Insecure dependency/, $@; |
| 834 | |
| 835 | eval { sysopen(my $tr, "foo", &O_TRUNC, $evil) }; |
| 836 | test 173, $@ =~ /^Insecure dependency/, $@; |
| 837 | |
| 838 | unlink("foo"); # not unlink($evil), because that would fail... |
| 839 | } |
| 840 | } |
| 841 | |
| 842 | { |
| 843 | # bug 20010526.004 |
| 844 | |
| 845 | use warnings; |
| 846 | |
| 847 | local $SIG{__WARN__} = sub { print "not " }; |
| 848 | |
| 849 | sub fmi { |
| 850 | my $divnum = shift()/1; |
| 851 | sprintf("%1.1f\n", $divnum); |
| 852 | } |
| 853 | |
| 854 | fmi(21 . $TAINT); |
| 855 | fmi(37); |
| 856 | fmi(248); |
| 857 | |
| 858 | print "ok 174\n"; |
| 859 | } |
| 860 | |
| 861 | |
| 862 | { |
| 863 | # Bug ID 20010730.010 |
| 864 | |
| 865 | my $i = 0; |
| 866 | |
| 867 | sub Tie::TIESCALAR { |
| 868 | my $class = shift; |
| 869 | my $arg = shift; |
| 870 | |
| 871 | bless \$arg => $class; |
| 872 | } |
| 873 | |
| 874 | sub Tie::FETCH { |
| 875 | $i ++; |
| 876 | ${$_ [0]} |
| 877 | } |
| 878 | |
| 879 | |
| 880 | package main; |
| 881 | |
| 882 | my $bar = "The Big Bright Green Pleasure Machine"; |
| 883 | taint_these $bar; |
| 884 | tie my ($foo), Tie => $bar; |
| 885 | |
| 886 | my $baz = $foo; |
| 887 | |
| 888 | print $i == 1 ? "ok 175\n" : "not ok 175\n" |
| 889 | |
| 890 | } |
| 891 | |
| 892 | { |
| 893 | # Check that all environment variables are tainted. |
| 894 | my @untainted; |
| 895 | while (my ($k, $v) = each %ENV) { |
| 896 | if (!tainted($v) && |
| 897 | # These we have untainted explicitly earlier. |
| 898 | $k !~ /^(BASH_ENV|CDPATH|ENV|IFS|PATH|TEMP|TERM|TMP)$/) { |
| 899 | push @untainted, "# '$k' = '$v'\n"; |
| 900 | } |
| 901 | } |
| 902 | print @untainted == 0 ? "ok 176\n" : "not ok 176\n"; |
| 903 | print "# untainted:\n", @untainted if @untainted; |
| 904 | } |
| 905 | |
| 906 | |
| 907 | ok( ${^TAINT}, '$^TAINT is on' ); |
| 908 | |
| 909 | eval { ${^TAINT} = 0 }; |
| 910 | ok( ${^TAINT}, '$^TAINT is not assignable' ); |
| 911 | ok( $@ =~ /^Modification of a read-only value attempted/, |
| 912 | 'Assigning to ${^TAINT} fails' ); |
| 913 | |
| 914 | { |
| 915 | # bug 20011111.105 |
| 916 | |
| 917 | my $re1 = qr/x$TAINT/; |
| 918 | test 180, tainted $re1; |
| 919 | |
| 920 | my $re2 = qr/^$re1\z/; |
| 921 | test 181, tainted $re2; |
| 922 | |
| 923 | my $re3 = "$re2"; |
| 924 | test 182, tainted $re3; |
| 925 | } |
| 926 | |
| 927 | if ($Is_MSWin32) { |
| 928 | print "ok 183 # Skipped: system {} has different semantics\n"; |
| 929 | } |
| 930 | else |
| 931 | { |
| 932 | # bug 20010221.005 |
| 933 | local $ENV{PATH} .= $TAINT; |
| 934 | eval { system { "echo" } "/arg0", "arg1" }; |
| 935 | test 183, $@ =~ /^Insecure \$ENV/; |
| 936 | } |
| 937 | if ($Is_VMS) { |
| 938 | for (184..203) {print "not ok $_ # TODO tainted %ENV warning occludes tainted arguments warning\n";} |
| 939 | } |
| 940 | else |
| 941 | { |
| 942 | # bug 20020208.005 plus some extras |
| 943 | # single arg exec/system are tests 80-83 |
| 944 | use if $] lt '5.009', warnings => FATAL => 'taint'; |
| 945 | my $err = $] ge '5.009' ? qr/^Insecure dependency/ |
| 946 | : qr/^Use of tainted arguments/; |
| 947 | test 184, eval { exec $TAINT, $TAINT } eq '', 'exec'; |
| 948 | test 185, $@ =~ $err, $@; |
| 949 | test 186, eval { exec $TAINT $TAINT } eq '', 'exec'; |
| 950 | test 187, $@ =~ $err, $@; |
| 951 | test 188, eval { exec $TAINT $TAINT, $TAINT } eq '', 'exec'; |
| 952 | test 189, $@ =~ $err, $@; |
| 953 | test 190, eval { exec $TAINT 'notaint' } eq '', 'exec'; |
| 954 | test 191, $@ =~ $err, $@; |
| 955 | test 192, eval { exec {'notaint'} $TAINT } eq '', 'exec'; |
| 956 | test 193, $@ =~ $err, $@; |
| 957 | |
| 958 | test 194, eval { system $TAINT, $TAINT } eq '', 'system'; |
| 959 | test 195, $@ =~ $err, $@; |
| 960 | test 196, eval { system $TAINT $TAINT } eq '', 'exec'; |
| 961 | test 197, $@ =~ $err, $@; |
| 962 | test 198, eval { system $TAINT $TAINT, $TAINT } eq '', 'exec'; |
| 963 | test 199, $@ =~ $err, $@; |
| 964 | test 200, eval { system $TAINT 'notaint' } eq '', 'exec'; |
| 965 | test 201, $@ =~ $err, $@; |
| 966 | test 202, eval { system {'notaint'} $TAINT } eq '', 'exec'; |
| 967 | test 203, $@ =~ $err, $@; |
| 968 | } |