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1 | #!/usr/bin/perl | |
2 | # | |
3 | # setup-openssh.pl | |
4 | # | |
5 | # Adapts the installed gsi-openssh environment to the current machine, | |
6 | # performing actions that originally occurred during the package's | |
7 | # 'make install' phase. | |
8 | # | |
9 | # Send comments/fixes/suggestions to: | |
10 | # Chase Phillips <cphillip@ncsa.uiuc.edu> | |
11 | # | |
12 | ||
13 | # | |
14 | # Get user's GPT_LOCATION since we may be installing this using a new(er) | |
15 | # version of GPT. | |
16 | # | |
17 | ||
18 | $gptpath = $ENV{GPT_LOCATION}; | |
19 | ||
20 | # | |
21 | # And the old standby.. | |
22 | # | |
23 | ||
24 | $gpath = $ENV{GLOBUS_LOCATION}; | |
25 | if (!defined($gpath)) | |
26 | { | |
27 | exitDie("ERROR: GLOBUS_LOCATION needs to be set before running this script!\n"); | |
28 | } | |
29 | ||
30 | # | |
31 | # Include standard modules | |
32 | # | |
33 | ||
34 | use Getopt::Long; | |
35 | use Cwd; | |
36 | use Cwd 'abs_path'; | |
37 | ||
38 | # | |
39 | # modify the ld library path for when we call ssh executables | |
40 | # | |
41 | ||
42 | $oldldpath = $ENV{LD_LIBRARY_PATH}; | |
43 | $newldpath = "$gpath/lib"; | |
44 | if (length($oldldpath) > 0) | |
45 | { | |
46 | $newldpath .= ":$oldldpath"; | |
47 | } | |
48 | $ENV{LD_LIBRARY_PATH} = "$newldpath"; | |
49 | ||
50 | # | |
51 | # i'm including this because other perl scripts in the gpt setup directories | |
52 | # do so | |
53 | # | |
54 | ||
55 | if (defined($gptpath)) | |
56 | { | |
57 | @INC = (@INC, "$gptpath/lib/perl", "$gpath/lib/perl"); | |
58 | } | |
59 | else | |
60 | { | |
61 | @INC = (@INC, "$gpath/lib/perl"); | |
62 | } | |
63 | ||
64 | require Grid::GPT::Setup; | |
65 | ||
66 | # | |
67 | # script-centred variable initialization | |
68 | # | |
69 | ||
70 | my $globusdir = $gpath; | |
71 | my $myname = "setup-openssh.pl"; | |
72 | ||
73 | # | |
74 | # Set up path prefixes for use in the path translations | |
75 | # | |
76 | ||
77 | $prefix = ${globusdir}; | |
78 | $exec_prefix = "${prefix}"; | |
79 | $bindir = "${exec_prefix}/bin/ssh.d"; | |
80 | $sbindir = "${exec_prefix}/sbin"; | |
81 | $sysconfdir = "$prefix/etc/ssh"; | |
82 | $localsshdir = "/etc/ssh"; | |
83 | $setupdir = "$prefix/setup/gsi_openssh_setup"; | |
84 | ||
85 | # | |
86 | # standard key types and their root file name mappings | |
87 | # | |
88 | ||
89 | my $keyfiles = { | |
90 | "dsa" => "ssh_host_dsa_key", | |
91 | "rsa" => "ssh_host_rsa_key", | |
92 | "rsa1" => "ssh_host_key", | |
93 | }; | |
94 | ||
95 | # | |
96 | # argument specification. we offload some processing work from later functions | |
97 | # to verify correct args by using anon subs in various places. | |
98 | # | |
99 | ||
100 | my($prompt, $force, $verbose); | |
101 | ||
102 | $prompt = 1; | |
103 | $verbose = 0; | |
104 | ||
105 | GetOptions( | |
106 | 'prompt!' => \$prompt, | |
107 | 'force' => \$force, | |
108 | 'verbose' => \$verbose, | |
109 | ) or pod2usage(2); | |
110 | ||
111 | # | |
112 | # miscellaneous initialization functions | |
113 | # | |
114 | ||
115 | setPrivilegeSeparation(0); | |
116 | ||
117 | # | |
118 | # main execution. This should find its way into a subroutine at some future | |
119 | # point. | |
120 | # | |
121 | ||
122 | debug0("Configuring gsi_openssh\n"); | |
123 | debug0("------------------------------------------------------------\n"); | |
124 | debug0("Executing...\n"); | |
125 | ||
126 | makeConfDir(); | |
127 | copyPRNGFile(); | |
128 | $keyhash = determineKeys(); | |
129 | runKeyGen($keyhash->{gen}); | |
130 | linkKeyFiles($keyhash->{link}); | |
131 | copyConfigFiles(); | |
132 | ||
133 | my $metadata = new Grid::GPT::Setup(package_name => "gsi_openssh_setup"); | |
134 | ||
135 | $metadata->finish(); | |
136 | ||
137 | debug0("\n"); | |
138 | debug0("Notes:\n\n"); | |
139 | ||
140 | if ( getPrivilegeSeparation() ) | |
141 | { | |
142 | debug0(" o Privilege separation is on.\n"); | |
143 | } | |
144 | elsif ( !getPrivilegeSeparation() ) | |
145 | { | |
146 | debug0(" o Privilege separation is off.\n"); | |
147 | } | |
148 | ||
149 | debug0(" o GSI-OpenSSH website is <http://grid.ncsa.uiuc.edu/ssh/>.\n"); | |
150 | debug0("------------------------------------------------------------\n"); | |
151 | debug0("Finished configuring gsi_openssh.\n"); | |
152 | ||
153 | exit; | |
154 | ||
155 | # | |
156 | # subroutines | |
157 | # | |
158 | ||
159 | ### initPRNGHash( ) | |
160 | # | |
161 | # initialize the PRNG pathname hash | |
162 | # | |
163 | ||
164 | sub initPRNGHash( ) | |
165 | { | |
166 | # | |
167 | # standard prng to executable conversion names | |
168 | # | |
169 | ||
170 | addPRNGCommand("\@PROG_LS\@", "ls"); | |
171 | addPRNGCommand("\@PROG_NETSTAT\@", "netstat"); | |
172 | addPRNGCommand("\@PROG_ARP\@", "arp"); | |
173 | addPRNGCommand("\@PROG_IFCONFIG\@", "ifconfig"); | |
174 | addPRNGCommand("\@PROG_PS\@", "ps"); | |
175 | addPRNGCommand("\@PROG_JSTAT\@", "jstat"); | |
176 | addPRNGCommand("\@PROG_W\@", "w"); | |
177 | addPRNGCommand("\@PROG_WHO\@", "who"); | |
178 | addPRNGCommand("\@PROG_LAST\@", "last"); | |
179 | addPRNGCommand("\@PROG_LASTLOG\@", "lastlog"); | |
180 | addPRNGCommand("\@PROG_DF\@", "df"); | |
181 | addPRNGCommand("\@PROG_SAR\@", "sar"); | |
182 | addPRNGCommand("\@PROG_VMSTAT\@", "vmstat"); | |
183 | addPRNGCommand("\@PROG_UPTIME\@", "uptime"); | |
184 | addPRNGCommand("\@PROG_IPCS\@", "ipcs"); | |
185 | addPRNGCommand("\@PROG_TAIL\@", "tail"); | |
186 | ||
187 | debug1("Determining paths for PRNG commands...\n"); | |
188 | ||
189 | $paths = determinePRNGPaths(); | |
190 | ||
191 | return; | |
192 | } | |
193 | ||
194 | ### getDirectoryPaths( ) | |
195 | # | |
196 | # return an array ref containing all of the directories in which we should search | |
197 | # for our listing of executable names. | |
198 | # | |
199 | ||
200 | sub getDirectoryPaths( ) | |
201 | { | |
202 | # | |
203 | # read in the PATH environmental variable and prepend a set of 'safe' | |
204 | # directories from which to test PRNG commands. | |
205 | # | |
206 | ||
207 | $path = $ENV{PATH}; | |
208 | $path = "/bin:/usr/bin:/sbin:/usr/sbin:/etc:" . $path; | |
209 | @dirs = split(/:/, $path); | |
210 | ||
211 | # | |
212 | # sanitize each directory listed in the array. | |
213 | # | |
214 | ||
215 | @dirs = map { | |
216 | $tmp = $_; | |
217 | $tmp =~ s:/+:/:g; | |
218 | $tmp =~ s:^\s+|\s+$::g; | |
219 | $tmp; | |
220 | } @dirs; | |
221 | ||
222 | return \@dirs; | |
223 | } | |
224 | ||
225 | ### addPRNGCommand( $prng_name, $exec_name ) | |
226 | # | |
227 | # given a PRNG name and a corresponding executable name, add it to our list of | |
228 | # PRNG commands for which to find on the system. | |
229 | # | |
230 | ||
231 | sub addPRNGCommand | |
232 | { | |
233 | my($prng_name, $exec_name) = @_; | |
234 | ||
235 | prngAddNode($prng_name, $exec_name); | |
236 | } | |
237 | ||
238 | ### copyPRNGFile( ) | |
239 | # | |
240 | # read in ssh_prng_cmds.in, translate the program listings to the paths we have | |
241 | # found on the local system, and then write the output to ssh_prng_cmds. | |
242 | # | |
243 | ||
244 | sub copyPRNGFile | |
245 | { | |
246 | my($fileInput, $fileOutput); | |
247 | my($mode, $uid, $gid); | |
248 | my($data); | |
249 | ||
250 | if ( isPresent("$sysconfdir/ssh_prng_cmds") && !isForced() ) | |
251 | { | |
252 | debug1("ssh_prng_cmds found and not forced. Not installing ssh_prng_cmds...\n"); | |
253 | return; | |
254 | } | |
255 | ||
256 | initPRNGHash(); | |
257 | ||
258 | debug1("Fixing paths in ssh_prng_cmds...\n"); | |
259 | ||
260 | $fileInput = "$setupdir/ssh_prng_cmds.in"; | |
261 | $fileOutput = "$sysconfdir/ssh_prng_cmds"; | |
262 | ||
263 | # | |
264 | # verify that we are prepared to work with $fileInput | |
265 | # | |
266 | ||
267 | if ( !isReadable($fileInput) ) | |
268 | { | |
269 | debug1("Cannot read $fileInput... skipping.\n"); | |
270 | return; | |
271 | } | |
272 | ||
273 | # | |
274 | # verify that we are prepared to work with $fileOuput | |
275 | # | |
276 | ||
277 | if ( !prepareFileWrite($fileOutput) ) | |
278 | { | |
279 | return; | |
280 | } | |
281 | ||
282 | # | |
283 | # Grab the current mode/uid/gid for use later | |
284 | # | |
285 | ||
286 | $mode = (stat($fileInput))[2]; | |
287 | $uid = (stat($fileInput))[4]; | |
288 | $gid = (stat($fileInput))[5]; | |
289 | ||
290 | # | |
291 | # Open the files for reading and writing, and loop over the input's contents | |
292 | # | |
293 | ||
294 | $data = readFile($fileInput); | |
295 | for my $k (keys %$prngcmds) | |
296 | { | |
297 | $sub = prngGetExecPath($k); | |
298 | $data =~ s:$k:$sub:g; | |
299 | } | |
300 | writeFile($fileOutput, $data); | |
301 | ||
302 | # | |
303 | # An attempt to revert the new file back to the original file's | |
304 | # mode/uid/gid | |
305 | # | |
306 | ||
307 | chmod($mode, $fileOutput); | |
308 | chown($uid, $gid, $fileOutput); | |
309 | ||
310 | return 0; | |
311 | } | |
312 | ||
313 | ### determinePRNGPaths( ) | |
314 | # | |
315 | # for every entry in the PRNG hash, seek out and find the path for the | |
316 | # corresponding executable name. | |
317 | # | |
318 | ||
319 | sub determinePRNGPaths | |
320 | { | |
321 | my(@paths, @dirs); | |
322 | my($exec_name, $exec_path); | |
323 | ||
324 | $dirs = getDirectoryPaths(); | |
325 | ||
326 | for my $k (keys %$prngcmds) | |
327 | { | |
328 | $exec_name = prngGetExecName($k); | |
329 | $exec_path = findExecutable($exec_name, $dirs); | |
330 | prngSetExecPath($k, $exec_path); | |
331 | } | |
332 | ||
333 | return; | |
334 | } | |
335 | ||
336 | ### prngAddNode( $prng_name, $exec_name ) | |
337 | # | |
338 | # add a new node to the PRNG hash | |
339 | # | |
340 | ||
341 | sub prngAddNode | |
342 | { | |
343 | my($prng_name, $exec_name) = @_; | |
344 | my($node); | |
345 | ||
346 | if (!defined($prngcmds)) | |
347 | { | |
348 | $prngcmds = {}; | |
349 | } | |
350 | ||
351 | $node = {}; | |
352 | $node->{prng} = $prng_name; | |
353 | $node->{exec} = $exec_name; | |
354 | ||
355 | $prngcmds->{$prng_name} = $node; | |
356 | } | |
357 | ||
358 | ### prngGetExecName( $key ) | |
359 | # | |
360 | # get the executable name from the prng commands hash named by $key | |
361 | # | |
362 | ||
363 | sub prngGetExecName | |
364 | { | |
365 | my($key) = @_; | |
366 | ||
367 | return $prngcmds->{$key}->{exec}; | |
368 | } | |
369 | ||
370 | ### prngGetExecPath( $key ) | |
371 | # | |
372 | # get the executable path from the prng commands hash named by $key | |
373 | # | |
374 | ||
375 | sub prngGetExecPath | |
376 | { | |
377 | my($key) = @_; | |
378 | ||
379 | return $prngcmds->{$key}->{exec_path}; | |
380 | } | |
381 | ||
382 | ### prngGetNode( $key ) | |
383 | # | |
384 | # return a reference to the node named by $key | |
385 | # | |
386 | ||
387 | sub prngGetNode | |
388 | { | |
389 | my($key) = @_; | |
390 | ||
391 | return ${$prngcmds}{$key}; | |
392 | } | |
393 | ||
394 | ### prngSetExecPath( $key, $path ) | |
395 | # | |
396 | # given a key, set the executable path in that node to $path | |
397 | # | |
398 | ||
399 | sub prngSetExecPath | |
400 | { | |
401 | my($key, $path) = @_; | |
402 | ||
403 | $prngcmds->{$key}->{exec_path} = $path; | |
404 | } | |
405 | ||
406 | ### findExecutable( $exec_name, $dirs ) | |
407 | # | |
408 | # given an executable name, test each possible path in $dirs to see if such | |
409 | # an executable exists. | |
410 | # | |
411 | ||
412 | sub findExecutable | |
413 | { | |
414 | my($exec_name, $dirs) = @_; | |
415 | ||
416 | for my $d (@$dirs) | |
417 | { | |
418 | $test = "$d/$exec_name"; | |
419 | ||
420 | if ( isExecutable($test) ) | |
421 | { | |
422 | return $test; | |
423 | } | |
424 | } | |
425 | ||
426 | return "undef"; | |
427 | } | |
428 | ||
429 | ### linkKeyFiles( $linklist ) | |
430 | # | |
431 | # given an array of keys to link, link both the key and its public variant into | |
432 | # the gsi-openssh configuration directory. | |
433 | # | |
434 | ||
435 | sub linkKeyFiles | |
436 | { | |
437 | my($linklist) = @_; | |
438 | my($regex, $basename); | |
439 | ||
440 | if (@$linklist) | |
441 | { | |
442 | debug1("Linking ssh host keys...\n"); | |
443 | ||
444 | for my $f (@$linklist) | |
445 | { | |
446 | $f =~ s:/+:/:g; | |
447 | ||
448 | if (length($f) > 0) | |
449 | { | |
450 | $keyfile = "$f"; | |
451 | $pubkeyfile = "$f.pub"; | |
452 | ||
453 | linkFile("$localsshdir/$keyfile", "$sysconfdir/$keyfile"); | |
454 | linkFile("$localsshdir/$pubkeyfile", "$sysconfdir/$pubkeyfile"); | |
455 | } | |
456 | } | |
457 | } | |
458 | } | |
459 | ||
460 | ### isForced( ) | |
461 | # | |
462 | # return true if the user passed in the force flag. return false otherwise. | |
463 | # | |
464 | ||
465 | sub isForced | |
466 | { | |
467 | if ( defined($force) && $force ) | |
468 | { | |
469 | return 1; | |
470 | } | |
471 | else | |
472 | { | |
473 | return 0; | |
474 | } | |
475 | } | |
476 | ||
477 | ### isReadable( $file ) | |
478 | # | |
479 | # given a file, return true if that file both exists and is readable by the | |
480 | # effective user id. return false otherwise. | |
481 | # | |
482 | ||
483 | sub isReadable | |
484 | { | |
485 | my($file) = @_; | |
486 | ||
487 | if ( ( -e $file ) && ( -r $file ) ) | |
488 | { | |
489 | return 1; | |
490 | } | |
491 | else | |
492 | { | |
493 | return 0; | |
494 | } | |
495 | } | |
496 | ||
497 | ### isExecutable( $file ) | |
498 | # | |
499 | # return true if $file is executable. return false otherwise. | |
500 | # | |
501 | ||
502 | sub isExecutable | |
503 | { | |
504 | my($file) = @_; | |
505 | ||
506 | if ( -x $file ) | |
507 | { | |
508 | return 1; | |
509 | } | |
510 | else | |
511 | { | |
512 | return 0; | |
513 | } | |
514 | } | |
515 | ||
516 | ### isWritable( $file ) | |
517 | # | |
518 | # given a file, return true if that file does not exist or is writable by the | |
519 | # effective user id. return false otherwise. | |
520 | # | |
521 | ||
522 | sub isWritable | |
523 | { | |
524 | my($file) = @_; | |
525 | ||
526 | if ( ( ! -e $file ) || ( -w $file ) ) | |
527 | { | |
528 | return 1; | |
529 | } | |
530 | else | |
531 | { | |
532 | return 0; | |
533 | } | |
534 | } | |
535 | ||
536 | ### isPresent( $file ) | |
537 | # | |
538 | # given a file, return true if that file exists. return false otherwise. | |
539 | # | |
540 | ||
541 | sub isPresent | |
542 | { | |
543 | my($file) = @_; | |
544 | ||
545 | if ( -e $file ) | |
546 | { | |
547 | return 1; | |
548 | } | |
549 | else | |
550 | { | |
551 | return 0; | |
552 | } | |
553 | } | |
554 | ||
555 | ### makeConfDir( ) | |
556 | # | |
557 | # make the gsi-openssh configuration directory if it doesn't already exist. | |
558 | # | |
559 | ||
560 | sub makeConfDir | |
561 | { | |
562 | if ( isPresent($sysconfdir) ) | |
563 | { | |
564 | if ( -d $sysconfdir ) | |
565 | { | |
566 | return; | |
567 | } | |
568 | ||
569 | debug1("${sysconfdir} already exists and is not a directory!\n"); | |
570 | exit; | |
571 | } | |
572 | ||
573 | debug1("Could not find ${sysconfdir} directory... creating.\n"); | |
574 | action("mkdir -p $sysconfdir"); | |
575 | ||
576 | return; | |
577 | } | |
578 | ||
579 | ### determineKeys( ) | |
580 | # | |
581 | # based on a set of key types, triage them to determine if for each key type, that | |
582 | # key type should be copied from the main ssh configuration directory, or if it | |
583 | # should be generated using ssh-keygen. | |
584 | # | |
585 | ||
586 | sub determineKeys | |
587 | { | |
588 | my($keyhash, $keylist); | |
589 | my($count); | |
590 | ||
591 | # | |
592 | # initialize our variables | |
593 | # | |
594 | ||
595 | $count = 0; | |
596 | ||
597 | $keyhash = {}; | |
598 | $keyhash->{gen} = []; # a list of keytypes to generate | |
599 | $keyhash->{link} = []; # a list of files to link | |
600 | ||
601 | $genlist = $keyhash->{gen}; | |
602 | $linklist = $keyhash->{link}; | |
603 | ||
604 | # | |
605 | # loop over our keytypes and determine what we need to do for each of them | |
606 | # | |
607 | ||
608 | for my $keytype (keys %$keyfiles) | |
609 | { | |
610 | $basekeyfile = $keyfiles->{$keytype}; | |
611 | ||
612 | # | |
613 | # if the key's are already present, we don't need to bother with this rigamarole | |
614 | # | |
615 | ||
616 | $gkeyfile = "$sysconfdir/$basekeyfile"; | |
617 | $gpubkeyfile = "$sysconfdir/$basekeyfile.pub"; | |
618 | ||
619 | if ( isPresent($gkeyfile) && isPresent($gpubkeyfile) ) | |
620 | { | |
621 | if ( isForced() ) | |
622 | { | |
623 | if ( isWritable("$sysconfdir/$basekeyfile") && isWritable("$sysconfdir/$basekeyfile.pub") ) | |
624 | { | |
625 | action("rm $sysconfdir/$basekeyfile"); | |
626 | action("rm $sysconfdir/$basekeyfile.pub"); | |
627 | } | |
628 | else | |
629 | { | |
630 | next; | |
631 | } | |
632 | } | |
633 | } | |
634 | ||
635 | # | |
636 | # if we can find a copy of the keys in /etc/ssh, we'll link them to the user's | |
637 | # globus location | |
638 | # | |
639 | ||
640 | $mainkeyfile = "$localsshdir/$basekeyfile"; | |
641 | $mainpubkeyfile = "$localsshdir/$basekeyfile.pub"; | |
642 | ||
643 | if ( isReadable($mainkeyfile) && isReadable($mainpubkeyfile) ) | |
644 | { | |
645 | push(@$linklist, $basekeyfile); | |
646 | $count++; | |
647 | next; | |
648 | } | |
649 | ||
650 | # | |
651 | # otherwise, we need to generate the key | |
652 | # | |
653 | ||
654 | push(@$genlist, $keytype); | |
655 | $count++; | |
656 | } | |
657 | ||
658 | return $keyhash; | |
659 | } | |
660 | ||
661 | ### runKeyGen( $gen_keys ) | |
662 | # | |
663 | # given a set of key types, generate private and public keys for that key type and | |
664 | # place them in the gsi-openssh configuration directory. | |
665 | # | |
666 | ||
667 | sub runKeyGen | |
668 | { | |
669 | my($gen_keys) = @_; | |
670 | my $keygen = "$bindir/ssh-keygen"; | |
671 | ||
672 | if (@$gen_keys && -x $keygen) | |
673 | { | |
674 | debug1("Generating ssh host keys...\n"); | |
675 | ||
676 | for my $k (@$gen_keys) | |
677 | { | |
678 | $keyfile = $keyfiles->{$k}; | |
679 | ||
680 | if ( !isPresent("$sysconfdir/$keyfile") ) | |
681 | { | |
682 | action("$bindir/ssh-keygen -t $k -f $sysconfdir/$keyfile -N \"\""); | |
683 | } | |
684 | } | |
685 | } | |
686 | ||
687 | return 0; | |
688 | } | |
689 | ||
690 | ### copySSHDConfigFile( ) | |
691 | # | |
692 | # this subroutine 'edits' the paths in sshd_config to suit them to the current environment | |
693 | # in which the setup script is being run. | |
694 | # | |
695 | ||
696 | sub copySSHDConfigFile | |
697 | { | |
698 | my($fileInput, $fileOutput); | |
699 | my($mode, $uid, $gid); | |
700 | my($line, $newline); | |
701 | my($privsep_enabled); | |
702 | ||
703 | debug1("Fixing paths in sshd_config...\n"); | |
704 | ||
705 | $fileInput = "$setupdir/sshd_config.in"; | |
706 | $fileOutput = "$sysconfdir/sshd_config"; | |
707 | ||
708 | # | |
709 | # verify that we are prepared to work with $fileInput | |
710 | # | |
711 | ||
712 | if ( !isReadable($fileInput) ) | |
713 | { | |
714 | debug1("Cannot read $fileInput... skipping.\n"); | |
715 | return; | |
716 | } | |
717 | ||
718 | # | |
719 | # verify that we are prepared to work with $fileOuput | |
720 | # | |
721 | ||
722 | if ( !prepareFileWrite($fileOutput) ) | |
723 | { | |
724 | return; | |
725 | } | |
726 | ||
727 | # | |
728 | # check to see whether we should enable privilege separation | |
729 | # | |
730 | ||
731 | if ( userExists("sshd") && ( -d "/var/empty" ) && ( getOwnerID("/var/empty") eq 0 ) ) | |
732 | { | |
733 | setPrivilegeSeparation(1); | |
734 | } | |
735 | else | |
736 | { | |
737 | setPrivilegeSeparation(0); | |
738 | } | |
739 | ||
740 | if ( getPrivilegeSeparation() ) | |
741 | { | |
742 | $privsep_enabled = "yes"; | |
743 | } | |
744 | else | |
745 | { | |
746 | $privsep_enabled = "no"; | |
747 | } | |
748 | ||
749 | # | |
750 | # Grab the current mode/uid/gid for use later | |
751 | # | |
752 | ||
753 | $mode = (stat($fileInput))[2]; | |
754 | $uid = (stat($fileInput))[4]; | |
755 | $gid = (stat($fileInput))[5]; | |
756 | ||
757 | # | |
758 | # Open the files for reading and writing, and loop over the input's contents | |
759 | # | |
760 | ||
761 | $data = readFile($fileInput); | |
762 | ||
763 | # # | |
764 | # # alter the PidFile config | |
765 | # # | |
766 | # | |
767 | # $text = "PidFile\t$gpath/var/sshd.pid"; | |
768 | # $data =~ s:^[\s|#]*PidFile.*$:$text:gm; | |
769 | ||
770 | # | |
771 | # set the sftp directive | |
772 | # | |
773 | ||
774 | $text = "Subsystem\tsftp\t$gpath/libexec/sftp-server"; | |
775 | $data =~ s:^[\s|#]*Subsystem\s+sftp\s+.*$:$text:gm; | |
776 | ||
777 | # | |
778 | # set the privilege separation directive | |
779 | # | |
780 | ||
781 | $text = "UsePrivilegeSeparation\t${privsep_enabled}"; | |
782 | $data =~ s:^[\s|#]*UsePrivilegeSeparation.*$:$text:gm; | |
783 | ||
784 | # | |
785 | # dump the modified output to the config file | |
786 | # | |
787 | ||
788 | writeFile($fileOutput, $data); | |
789 | ||
790 | # | |
791 | # An attempt to revert the new file back to the original file's | |
792 | # mode/uid/gid | |
793 | # | |
794 | ||
795 | chmod($mode, $fileOutput); | |
796 | chown($uid, $gid, $fileOutput); | |
797 | ||
798 | return 0; | |
799 | } | |
800 | ||
801 | ### setPrivilegeSeparation( $value ) | |
802 | # | |
803 | # set the privilege separation variable to $value | |
804 | # | |
805 | ||
806 | sub setPrivilegeSeparation | |
807 | { | |
808 | my($value) = @_; | |
809 | ||
810 | $privsep = $value; | |
811 | } | |
812 | ||
813 | ### getPrivilegeSeparation( ) | |
814 | # | |
815 | # return the value of the privilege separation variable | |
816 | # | |
817 | ||
818 | sub getPrivilegeSeparation | |
819 | { | |
820 | return $privsep; | |
821 | } | |
822 | ||
823 | ### prepareFileWrite( $file ) | |
824 | # | |
825 | # test $file to prepare for writing to it. | |
826 | # | |
827 | ||
828 | sub prepareFileWrite | |
829 | { | |
830 | my($file) = @_; | |
831 | ||
832 | if ( isPresent($file) ) | |
833 | { | |
834 | debug1("$file already exists... "); | |
835 | ||
836 | if ( isForced() ) | |
837 | { | |
838 | if ( isWritable($file) ) | |
839 | { | |
840 | debug1("removing.\n"); | |
841 | action("rm $file"); | |
842 | return 1; | |
843 | } | |
844 | else | |
845 | { | |
846 | debug1("not writable -- skipping.\n"); | |
847 | return 0; | |
848 | } | |
849 | } | |
850 | else | |
851 | { | |
852 | debug1("skipping.\n"); | |
853 | return 0; | |
854 | } | |
855 | } | |
856 | ||
857 | return 1; | |
858 | } | |
859 | ||
860 | ### copyConfigFiles( ) | |
861 | # | |
862 | # subroutine that copies some extra config files to their proper location in | |
863 | # $GLOBUS_LOCATION/etc/ssh. | |
864 | # | |
865 | ||
866 | sub copyConfigFiles | |
867 | { | |
868 | # | |
869 | # copy the sshd_config file into the ssh configuration directory and alter | |
870 | # the paths in the file. | |
871 | # | |
872 | ||
873 | copySSHDConfigFile(); | |
874 | ||
875 | # | |
876 | # do straight copies of the ssh_config and moduli files. | |
877 | # | |
878 | ||
879 | debug1("Copying ssh_config and moduli to their proper location...\n"); | |
880 | ||
881 | copyFile("$setupdir/ssh_config", "$sysconfdir/ssh_config"); | |
882 | copyFile("$setupdir/moduli", "$sysconfdir/moduli"); | |
883 | ||
884 | # | |
885 | # copy and alter the SXXsshd script. | |
886 | # | |
887 | ||
888 | copySXXScript("$setupdir/SXXsshd.in", "$sbindir/SXXsshd"); | |
889 | } | |
890 | ||
891 | ### linkFile( $src, $dest ) | |
892 | # | |
893 | # create a symbolic link from $src to $dest. | |
894 | # | |
895 | ||
896 | sub linkFile | |
897 | { | |
898 | my($src, $dest) = @_; | |
899 | ||
900 | if ( !isReadable($src) ) | |
901 | { | |
902 | debug1("$src is not readable... not creating $dest.\n"); | |
903 | return; | |
904 | } | |
905 | ||
906 | if ( !prepareFileWrite($dest) ) | |
907 | { | |
908 | return; | |
909 | } | |
910 | ||
911 | action("ln -s $src $dest"); | |
912 | } | |
913 | ||
914 | ### copyFile( $src, $dest ) | |
915 | # | |
916 | # copy the file pointed to by $src to the location specified by $dest. in the | |
917 | # process observe the rules regarding when the '-force' flag was passed to us. | |
918 | # | |
919 | ||
920 | sub copyFile | |
921 | { | |
922 | my($src, $dest) = @_; | |
923 | ||
924 | if ( !isReadable($src) ) | |
925 | { | |
926 | debug1("$src is not readable... not creating $dest.\n"); | |
927 | return; | |
928 | } | |
929 | ||
930 | if ( !prepareFileWrite($dest) ) | |
931 | { | |
932 | return; | |
933 | } | |
934 | ||
935 | action("cp $src $dest"); | |
936 | } | |
937 | ||
938 | ### copySXXScript( $in, $out ) | |
939 | # | |
940 | # parse the input file, substituting in place the value of GLOBUS_LOCATION, and | |
941 | # write the result to the output file. | |
942 | # | |
943 | ||
944 | sub copySXXScript | |
945 | { | |
946 | my($in, $out) = @_; | |
947 | my($tmpgpath); | |
948 | ||
949 | if ( !isReadable($in) ) | |
950 | { | |
951 | debug1("$in is not readable... not creating $out.\n"); | |
952 | return; | |
953 | } | |
954 | ||
955 | if ( !prepareFileWrite($out) ) | |
956 | { | |
957 | return; | |
958 | } | |
959 | ||
960 | # | |
961 | # clean up any junk in the globus path variable | |
962 | # | |
963 | ||
964 | $tmpgpath = $gpath; | |
965 | $tmpgpath =~ s:/+:/:g; | |
966 | $tmpgpath =~ s:([^/]+)/$:\1:g; | |
967 | ||
968 | # | |
969 | # read in the script, substitute globus location, then write it back out | |
970 | # | |
971 | ||
972 | $data = readFile($in); | |
973 | $data =~ s|\@GLOBUS_LOCATION\@|$tmpgpath|g; | |
974 | writeFile($out, $data); | |
975 | action("chmod 755 $out"); | |
976 | } | |
977 | ||
978 | ### readFile( $filename ) | |
979 | # | |
980 | # reads and returns $filename's contents | |
981 | # | |
982 | ||
983 | sub readFile | |
984 | { | |
985 | my($filename) = @_; | |
986 | my($data); | |
987 | ||
988 | open(IN, "$filename") || exitDie("ERROR: Can't open '$filename': $!\n"); | |
989 | $/ = undef; | |
990 | $data = <IN>; | |
991 | $/ = "\n"; | |
992 | close(IN); | |
993 | ||
994 | return $data; | |
995 | } | |
996 | ||
997 | ### writeFile( $filename, $fileinput ) | |
998 | # | |
999 | # create the inputs to the ssl program at $filename, appending the common name to the | |
1000 | # stream in the process | |
1001 | # | |
1002 | ||
1003 | sub writeFile | |
1004 | { | |
1005 | my($filename, $fileinput) = @_; | |
1006 | ||
1007 | # | |
1008 | # test for a valid $filename | |
1009 | # | |
1010 | ||
1011 | if ( !defined($filename) || (length($filename) lt 1) ) | |
1012 | { | |
1013 | exitDie("ERROR: Filename is undefined!\n"); | |
1014 | } | |
1015 | ||
1016 | # | |
1017 | # verify that we are prepared to work with $filename | |
1018 | # | |
1019 | ||
1020 | if ( !prepareFileWrite($filename) ) | |
1021 | { | |
1022 | return; | |
1023 | } | |
1024 | ||
1025 | # | |
1026 | # write the output to $filename | |
1027 | # | |
1028 | ||
1029 | open(OUT, ">$filename"); | |
1030 | print OUT "$fileinput"; | |
1031 | close(OUT); | |
1032 | } | |
1033 | ||
1034 | ### debug1( $arg1, $arg2 ) | |
1035 | # | |
1036 | # Print out a debugging message at level 1. | |
1037 | # | |
1038 | ||
1039 | sub debug1 | |
1040 | { | |
1041 | debug(string => \@_, level => 1); | |
1042 | } | |
1043 | ||
1044 | ### debug0( $arg1, $arg2 ) | |
1045 | # | |
1046 | # Print out a debugging message at level 0. | |
1047 | # | |
1048 | ||
1049 | sub debug0 | |
1050 | { | |
1051 | debug(string => \@_, level => 0); | |
1052 | } | |
1053 | ||
1054 | ### debug( string => $string, level => $level ) | |
1055 | # | |
1056 | # Print out debugging messages at various levels. Feel free to use debugN() directly | |
1057 | # which in turn calls this subroutine. | |
1058 | # | |
1059 | ||
1060 | sub debug | |
1061 | { | |
1062 | my %args = @_; | |
1063 | ||
1064 | if (!defined($args{'level'})) | |
1065 | { | |
1066 | $args{'level'} = 0; | |
1067 | } | |
1068 | ||
1069 | if ($verbose >= $args{'level'}) | |
1070 | { | |
1071 | printf(@{$args{'string'}}); | |
1072 | } | |
1073 | } | |
1074 | ||
1075 | ### action( $command ) | |
1076 | # | |
1077 | # run $command within a proper system() command. | |
1078 | # | |
1079 | ||
1080 | sub action | |
1081 | { | |
1082 | my($command) = @_; | |
1083 | ||
1084 | debug1("$command\n"); | |
1085 | ||
1086 | my $result = system("LD_LIBRARY_PATH=\"$gpath/lib:\$LD_LIBRARY_PATH\"; $command >/dev/null 2>&1"); | |
1087 | ||
1088 | if (($result or $?) and $command !~ m!patch!) | |
1089 | { | |
1090 | exitDie("ERROR: Unable to execute command: $!\n"); | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | ### exitDie( $error ) | |
1095 | # | |
1096 | # a horribly named method meant to look like die but only exit, thereby not causing | |
1097 | # gpt-postinstall to croak. | |
1098 | # | |
1099 | ||
1100 | sub exitDie | |
1101 | { | |
1102 | my($error) = @_; | |
1103 | ||
1104 | print $error; | |
1105 | exit; | |
1106 | } | |
1107 | ||
1108 | ### query_boolean( $query_text, $default ) | |
1109 | # | |
1110 | # query the user with a string, and expect a response. If the user hits | |
1111 | # 'enter' instead of entering an input, then accept the default response. | |
1112 | # | |
1113 | ||
1114 | sub query_boolean | |
1115 | { | |
1116 | my($query_text, $default) = @_; | |
1117 | my($nondefault, $foo, $bar); | |
1118 | ||
1119 | if ( !$prompt ) | |
1120 | { | |
1121 | print "Prompt suppressed. Continuing...\n"; | |
1122 | return "y"; | |
1123 | } | |
1124 | ||
1125 | # | |
1126 | # Set $nondefault to the boolean opposite of $default. | |
1127 | # | |
1128 | ||
1129 | if ($default eq "n") | |
1130 | { | |
1131 | $nondefault = "y"; | |
1132 | } | |
1133 | else | |
1134 | { | |
1135 | $nondefault = "n"; | |
1136 | } | |
1137 | ||
1138 | print "${query_text} "; | |
1139 | print "[$default] "; | |
1140 | ||
1141 | $foo = <STDIN>; | |
1142 | ($bar) = split //, $foo; | |
1143 | ||
1144 | if ( grep(/\s/, $bar) ) | |
1145 | { | |
1146 | # this is debatable. all whitespace means 'default' | |
1147 | ||
1148 | $bar = $default; | |
1149 | } | |
1150 | elsif ($bar eq '') | |
1151 | { | |
1152 | $bar = $default; | |
1153 | } | |
1154 | elsif ($bar ne $default) | |
1155 | { | |
1156 | # everything else means 'nondefault'. | |
1157 | ||
1158 | $bar = $nondefault; | |
1159 | } | |
1160 | else | |
1161 | { | |
1162 | # extraneous step. to get here, $bar should be eq to $default anyway. | |
1163 | ||
1164 | $bar = $default; | |
1165 | } | |
1166 | ||
1167 | return $bar; | |
1168 | } | |
1169 | ||
1170 | ### absolutePath( $file ) | |
1171 | # | |
1172 | # converts a given pathname into a canonical path using the abs_path function. | |
1173 | # | |
1174 | ||
1175 | sub absolutePath | |
1176 | { | |
1177 | my($file) = @_; | |
1178 | my $home = $ENV{'HOME'}; | |
1179 | $file =~ s!~!$home!; | |
1180 | my $startd = cwd(); | |
1181 | $file =~ s!^\./!$startd/!; | |
1182 | $file = "$startd/$file" if $file !~ m!^\s*/!; | |
1183 | $file = abs_path($file); | |
1184 | return $file; | |
1185 | } | |
1186 | ||
1187 | ### getOwnerID( $file ) | |
1188 | # | |
1189 | # return the uid containing the owner ID of the given file. | |
1190 | # | |
1191 | ||
1192 | sub getOwnerID | |
1193 | { | |
1194 | my($file) = @_; | |
1195 | my($uid); | |
1196 | ||
1197 | # | |
1198 | # call stat() to get the mode of the file | |
1199 | # | |
1200 | ||
1201 | $uid = (stat($file))[4]; | |
1202 | ||
1203 | return $uid; | |
1204 | } | |
1205 | ||
1206 | ### getMode( $file ) | |
1207 | # | |
1208 | # return a string containing the mode of the given file. | |
1209 | # | |
1210 | ||
1211 | sub getMode | |
1212 | { | |
1213 | my($file) = @_; | |
1214 | my($tempmode, $mode); | |
1215 | ||
1216 | # | |
1217 | # call stat() to get the mode of the file | |
1218 | # | |
1219 | ||
1220 | $tempmode = (stat($file))[2]; | |
1221 | if (length($tempmode) < 1) | |
1222 | { | |
1223 | return ""; | |
1224 | } | |
1225 | ||
1226 | # | |
1227 | # call sprintf to format the mode into a UNIX-like string | |
1228 | # | |
1229 | ||
1230 | $mode = sprintf("%04o", $tempmode & 07777); | |
1231 | ||
1232 | return $mode; | |
1233 | } | |
1234 | ||
1235 | ### userExists( $username ) | |
1236 | # | |
1237 | # given a username, return true if the user exists on the system. return false | |
1238 | # otherwise. | |
1239 | # | |
1240 | ||
1241 | sub userExists | |
1242 | { | |
1243 | my($username) = @_; | |
1244 | my($uid); | |
1245 | ||
1246 | # | |
1247 | # retrieve the userid of the user with the given username | |
1248 | # | |
1249 | ||
1250 | $uid = getpwnam($username); | |
1251 | ||
1252 | # | |
1253 | # return true if $uid is defined and has a length greater than 0 | |
1254 | # | |
1255 | ||
1256 | if ( defined($uid) and (length($uid) > 0) ) | |
1257 | { | |
1258 | return 1; | |
1259 | } | |
1260 | else | |
1261 | { | |
1262 | return 0; | |
1263 | } | |
1264 | } |