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1 | package PVE::AccessControl; | |
2 | ||
3 | use strict; | |
4 | use Encode; | |
5 | use Crypt::OpenSSL::Random; | |
6 | use Crypt::OpenSSL::RSA; | |
7 | use MIME::Base64; | |
8 | use Digest::SHA; | |
9 | use Authen::PAM qw(:constants); | |
10 | use Net::LDAP; | |
11 | use PVE::Tools qw(run_command lock_file file_get_contents split_list safe_print); | |
12 | use PVE::Cluster qw(cfs_register_file cfs_read_file cfs_write_file cfs_lock_file); | |
13 | use PVE::JSONSchema; | |
14 | use Encode; | |
15 | ||
16 | use Data::Dumper; # fixme: remove | |
17 | ||
18 | # $authdir must be writable by root only! | |
19 | my $confdir = "/etc/pve"; | |
20 | my $authdir = "$confdir/priv"; | |
21 | my $authprivkeyfn = "$authdir/authkey.key"; | |
22 | my $authpubkeyfn = "$confdir/authkey.pub"; | |
23 | my $shadowconfigfile = "priv/shadow.cfg"; | |
24 | my $domainconfigfile = "domains.cfg"; | |
25 | my $pve_www_key_fn = "$confdir/pve-www.key"; | |
26 | ||
27 | my $ticket_lifetime = 3600*2; # 2 hours | |
28 | ||
29 | Crypt::OpenSSL::RSA->import_random_seed(); | |
30 | ||
31 | cfs_register_file('user.cfg', | |
32 | \&parse_user_config, | |
33 | \&write_user_config); | |
34 | ||
35 | cfs_register_file($shadowconfigfile, | |
36 | \&parse_shadow_passwd, | |
37 | \&write_shadow_config); | |
38 | ||
39 | cfs_register_file($domainconfigfile, | |
40 | \&parse_domains, | |
41 | \&write_domains); | |
42 | ||
43 | ||
44 | sub lock_user_config { | |
45 | my ($code, $errmsg) = @_; | |
46 | ||
47 | cfs_lock_file("user.cfg", undef, $code); | |
48 | my $err = $@; | |
49 | if ($err) { | |
50 | $errmsg ? die "$errmsg: $err" : die $err; | |
51 | } | |
52 | } | |
53 | ||
54 | sub lock_domain_config { | |
55 | my ($code, $errmsg) = @_; | |
56 | ||
57 | cfs_lock_file($domainconfigfile, undef, $code); | |
58 | my $err = $@; | |
59 | if ($err) { | |
60 | $errmsg ? die "$errmsg: $err" : die $err; | |
61 | } | |
62 | } | |
63 | ||
64 | sub lock_shadow_config { | |
65 | my ($code, $errmsg) = @_; | |
66 | ||
67 | cfs_lock_file($shadowconfigfile, undef, $code); | |
68 | my $err = $@; | |
69 | if ($err) { | |
70 | $errmsg ? die "$errmsg: $err" : die $err; | |
71 | } | |
72 | } | |
73 | ||
74 | my $pve_auth_pub_key; | |
75 | sub get_pubkey { | |
76 | ||
77 | return $pve_auth_pub_key if $pve_auth_pub_key; | |
78 | ||
79 | my $input = PVE::Tools::file_get_contents($authpubkeyfn); | |
80 | ||
81 | $pve_auth_pub_key = Crypt::OpenSSL::RSA->new_public_key($input); | |
82 | ||
83 | return $pve_auth_pub_key; | |
84 | } | |
85 | ||
86 | my $csrf_prevention_secret; | |
87 | my $get_csrfr_secret = sub { | |
88 | if (!$csrf_prevention_secret) { | |
89 | my $input = PVE::Tools::file_get_contents($pve_www_key_fn); | |
90 | $csrf_prevention_secret = Digest::SHA::sha1_base64($input); | |
91 | } | |
92 | return $csrf_prevention_secret; | |
93 | }; | |
94 | ||
95 | sub assemble_csrf_prevention_token { | |
96 | my ($username) = @_; | |
97 | ||
98 | my $timestamp = sprintf("%08X", time()); | |
99 | ||
100 | my $digest = Digest::SHA::sha1_base64("$timestamp:$username", &$get_csrfr_secret()); | |
101 | ||
102 | return "$timestamp:$digest"; | |
103 | } | |
104 | ||
105 | sub verify_csrf_prevention_token { | |
106 | my ($username, $token, $noerr) = @_; | |
107 | ||
108 | if ($token =~ m/^([A-Z0-9]{8}):(\S+)$/) { | |
109 | my $sig = $2; | |
110 | my $timestamp = $1; | |
111 | my $ttime = hex($timestamp); | |
112 | ||
113 | my $digest = Digest::SHA::sha1_base64("$timestamp:$username", &$get_csrfr_secret()); | |
114 | ||
115 | my $age = time() - $ttime; | |
116 | return if ($digest eq $sig) && ($age > -300) && ($age < $ticket_lifetime); | |
117 | } | |
118 | ||
119 | die "Permission denied - invalid csrf token\n" if !$noerr; | |
120 | ||
121 | return undef; | |
122 | } | |
123 | ||
124 | my $pve_auth_priv_key; | |
125 | sub get_privkey { | |
126 | ||
127 | return $pve_auth_priv_key if $pve_auth_priv_key; | |
128 | ||
129 | my $input = PVE::Tools::file_get_contents($authprivkeyfn); | |
130 | ||
131 | $pve_auth_priv_key = Crypt::OpenSSL::RSA->new_private_key($input); | |
132 | ||
133 | return $pve_auth_priv_key; | |
134 | } | |
135 | ||
136 | sub assemble_ticket { | |
137 | my ($username) = @_; | |
138 | ||
139 | my $rsa_priv = get_privkey(); | |
140 | ||
141 | my $timestamp = sprintf("%08X", time()); | |
142 | ||
143 | my $plain = "PVE:$username:$timestamp"; | |
144 | ||
145 | my $ticket = $plain . "::" . encode_base64($rsa_priv->sign($plain), ''); | |
146 | ||
147 | return $ticket; | |
148 | } | |
149 | ||
150 | sub verify_ticket { | |
151 | my ($ticket, $noerr) = @_; | |
152 | ||
153 | if ($ticket && $ticket =~ m/^(\S+)::([^:\s]+)$/) { | |
154 | my $plain = $1; | |
155 | my $sig = $2; | |
156 | ||
157 | my $rsa_pub = get_pubkey(); | |
158 | if ($rsa_pub->verify($plain, decode_base64($sig))) { | |
159 | if ($plain =~ m/^PVE:(([A-Za-z0-9\.\-_]+)(\@([A-Za-z0-9\.\-_]+))?):([A-Z0-9]{8})$/) { | |
160 | my $username = $1; | |
161 | my $timestamp = $5; | |
162 | my $ttime = hex($timestamp); | |
163 | ||
164 | my $age = time() - $ttime; | |
165 | ||
166 | if (($age > -300) && ($age < $ticket_lifetime)) { | |
167 | return wantarray ? ($username, $age) : $username; | |
168 | } | |
169 | } | |
170 | } | |
171 | } | |
172 | ||
173 | die "permission denied - invalid ticket\n" if !$noerr; | |
174 | ||
175 | return undef; | |
176 | } | |
177 | ||
178 | sub authenticate_user_shadow { | |
179 | my ($userid, $password) = @_; | |
180 | ||
181 | die "no password\n" if !$password; | |
182 | ||
183 | my $shadow_cfg = cfs_read_file($shadowconfigfile); | |
184 | ||
185 | if ($shadow_cfg->{users}->{$userid}) { | |
186 | my $encpw = crypt($password, $shadow_cfg->{users}->{$userid}->{shadow}); | |
187 | die "invalid credentials\n" if ($encpw ne $shadow_cfg->{users}->{$userid}->{shadow}); | |
188 | } else { | |
189 | die "no password set\n"; | |
190 | } | |
191 | } | |
192 | ||
193 | sub authenticate_user_pam { | |
194 | my ($userid, $password) = @_; | |
195 | ||
196 | # user (www-data) need to be able to read /etc/passwd /etc/shadow | |
197 | ||
198 | die "no password\n" if !$password; | |
199 | ||
200 | my $pamh = new Authen::PAM ('common-auth', $userid, sub { | |
201 | my @res; | |
202 | while(@_) { | |
203 | my $msg_type = shift; | |
204 | my $msg = shift; | |
205 | push @res, (0, $password); | |
206 | } | |
207 | push @res, 0; | |
208 | return @res; | |
209 | }); | |
210 | ||
211 | if (!ref ($pamh)) { | |
212 | my $err = $pamh->pam_strerror($pamh); | |
213 | die "error during PAM init: $err"; | |
214 | } | |
215 | ||
216 | my $res; | |
217 | ||
218 | if (($res = $pamh->pam_authenticate(0)) != PAM_SUCCESS) { | |
219 | my $err = $pamh->pam_strerror($res); | |
220 | die "$err\n"; | |
221 | } | |
222 | ||
223 | if (($res = $pamh->pam_acct_mgmt (0)) != PAM_SUCCESS) { | |
224 | my $err = $pamh->pam_strerror($res); | |
225 | die "$err\n"; | |
226 | } | |
227 | ||
228 | $pamh = 0; # call destructor | |
229 | } | |
230 | ||
231 | sub authenticate_user_ad { | |
232 | ||
233 | my ($entry, $server, $userid, $password) = @_; | |
234 | ||
235 | my $default_port = $entry->{secure} ? 636: 389; | |
236 | my $port = $entry->{port} ? $entry->{port} : $default_port; | |
237 | my $scheme = $entry->{secure} ? 'ldaps' : 'ldap'; | |
238 | my $conn_string = "$scheme://${server}:$port"; | |
239 | ||
240 | my $ldap = Net::LDAP->new($server) || die "$@\n"; | |
241 | ||
242 | $userid = "$userid\@$entry->{domain}" | |
243 | if $userid !~ m/@/ && $entry->{domain}; | |
244 | ||
245 | my $res = $ldap->bind($userid, password => $password); | |
246 | ||
247 | my $code = $res->code(); | |
248 | my $err = $res->error; | |
249 | ||
250 | $ldap->unbind(); | |
251 | ||
252 | die "$err\n" if ($code); | |
253 | } | |
254 | ||
255 | sub authenticate_user_ldap { | |
256 | ||
257 | my ($entry, $server, $userid, $password) = @_; | |
258 | ||
259 | my $default_port = $entry->{secure} ? 636: 389; | |
260 | my $port = $entry->{port} ? $entry->{port} : $default_port; | |
261 | my $scheme = $entry->{secure} ? 'ldaps' : 'ldap'; | |
262 | my $conn_string = "$scheme://${server}:$port"; | |
263 | ||
264 | my $ldap = Net::LDAP->new($conn_string, verify => 'none') || die "$@\n"; | |
265 | my $search = $entry->{user_attr} . "=" . $userid; | |
266 | my $result = $ldap->search( base => "$entry->{base_dn}", | |
267 | scope => "sub", | |
268 | filter => "$search", | |
269 | attrs => ['dn'] | |
270 | ); | |
271 | die "no entries returned\n" if !$result->entries; | |
272 | my @entries = $result->entries; | |
273 | my $res = $ldap->bind($entries[0]->dn, password => $password); | |
274 | ||
275 | my $code = $res->code(); | |
276 | my $err = $res->error; | |
277 | ||
278 | $ldap->unbind(); | |
279 | ||
280 | die "$err\n" if ($code); | |
281 | } | |
282 | ||
283 | sub authenticate_user_domain { | |
284 | my ($realm, $userid, $password) = @_; | |
285 | ||
286 | my $domain_cfg = cfs_read_file($domainconfigfile); | |
287 | ||
288 | die "no auth domain specified" if !$realm; | |
289 | ||
290 | if ($realm eq 'pam') { | |
291 | authenticate_user_pam($userid, $password); | |
292 | return; | |
293 | } | |
294 | ||
295 | eval { | |
296 | if ($realm eq 'pve') { | |
297 | authenticate_user_shadow($userid, $password); | |
298 | } else { | |
299 | ||
300 | my $cfg = $domain_cfg->{$realm}; | |
301 | die "auth domain '$realm' does not exists\n" if !$cfg; | |
302 | ||
303 | if ($cfg->{type} eq 'ad') { | |
304 | eval { authenticate_user_ad($cfg, $cfg->{server1}, $userid, $password); }; | |
305 | my $err = $@; | |
306 | return if !$err; | |
307 | die $err if !$cfg->{server2}; | |
308 | authenticate_user_ad($cfg, $cfg->{server2}, $userid, $password); | |
309 | } elsif ($cfg->{type} eq 'ldap') { | |
310 | eval { authenticate_user_ldap($cfg, $cfg->{server1}, $userid, $password); }; | |
311 | my $err = $@; | |
312 | return if !$err; | |
313 | die $err if !$cfg->{server2}; | |
314 | authenticate_user_ldap($cfg, $cfg->{server2}, $userid, $password); | |
315 | } else { | |
316 | die "unknown auth type '$cfg->{type}'\n"; | |
317 | } | |
318 | } | |
319 | }; | |
320 | if (my $err = $@) { | |
321 | sleep(2); # timeout after failed auth | |
322 | die $err; | |
323 | } | |
324 | } | |
325 | ||
326 | sub check_user_enabled { | |
327 | my ($usercfg, $username, $noerr) = @_; | |
328 | ||
329 | $username = verify_username($username, $noerr); | |
330 | return undef if !$username; | |
331 | ||
332 | return 1 if $usercfg && $usercfg->{users}->{$username} && | |
333 | $usercfg->{users}->{$username}->{enable}; | |
334 | ||
335 | return 1 if $username eq 'root@pam'; # root is always enabled | |
336 | ||
337 | die "no such user ('$username')\n" if !$noerr; | |
338 | ||
339 | return undef; | |
340 | } | |
341 | ||
342 | # password should be utf8 encoded | |
343 | sub authenticate_user { | |
344 | my ($username, $password) = @_; | |
345 | ||
346 | die "no username specified\n" if !$username; | |
347 | ||
348 | my ($userid, $realm); | |
349 | ||
350 | ($username, $userid, $realm) = verify_username($username); | |
351 | ||
352 | my $usercfg = cfs_read_file('user.cfg'); | |
353 | ||
354 | eval { check_user_enabled($usercfg, $username); }; | |
355 | if (my $err = $@) { | |
356 | sleep(2); | |
357 | die $err; | |
358 | } | |
359 | ||
360 | my $ctime = time(); | |
361 | my $expire = $usercfg->{users}->{$username}->{expire}; | |
362 | ||
363 | if ($expire && ($expire < $ctime)) { | |
364 | sleep(2); | |
365 | die "account expired\n" | |
366 | } | |
367 | ||
368 | authenticate_user_domain($realm, $userid, $password); | |
369 | ||
370 | return $username; | |
371 | } | |
372 | ||
373 | sub delete_shadow_password { | |
374 | my ($userid) = @_; | |
375 | ||
376 | lock_shadow_config(sub { | |
377 | my $shadow_cfg = cfs_read_file($shadowconfigfile); | |
378 | delete ($shadow_cfg->{users}->{$userid}) | |
379 | if $shadow_cfg->{users}->{$userid}; | |
380 | cfs_write_file($shadowconfigfile, $shadow_cfg); | |
381 | }); | |
382 | } | |
383 | ||
384 | sub store_shadow_password { | |
385 | my ($userid, $password) = @_; | |
386 | ||
387 | lock_shadow_config(sub { | |
388 | my $shadow_cfg = cfs_read_file($shadowconfigfile); | |
389 | $shadow_cfg->{users}->{$userid}->{shadow} = encrypt_pw($password); | |
390 | cfs_write_file($shadowconfigfile, $shadow_cfg); | |
391 | }); | |
392 | } | |
393 | ||
394 | sub encrypt_pw { | |
395 | my ($pw) = @_; | |
396 | ||
397 | my $time = substr (Digest::SHA::sha1_base64 (time), 0, 8); | |
398 | return crypt (encode("utf8", $pw), "\$5\$$time\$"); | |
399 | } | |
400 | ||
401 | sub store_pam_password { | |
402 | my ($userid, $password) = @_; | |
403 | ||
404 | my $cmd = ['/usr/sbin/usermod']; | |
405 | ||
406 | my $epw = encrypt_pw($password); | |
407 | push @$cmd, '-p', $epw; | |
408 | ||
409 | push @$cmd, $userid; | |
410 | ||
411 | run_command($cmd); | |
412 | } | |
413 | ||
414 | sub domain_set_password { | |
415 | my ($realm, $userid, $password) = @_; | |
416 | ||
417 | die "no auth domain specified" if !$realm; | |
418 | ||
419 | if ($realm eq 'pam') { | |
420 | store_pam_password($userid, $password); | |
421 | } elsif ($realm eq 'pve') { | |
422 | store_shadow_password($userid, $password); | |
423 | } else { | |
424 | die "can't set password on auth domain '$realm'\n"; | |
425 | } | |
426 | } | |
427 | ||
428 | sub add_user_group { | |
429 | ||
430 | my ($username, $usercfg, $group) = @_; | |
431 | $usercfg->{users}->{$username}->{groups}->{$group} = 1; | |
432 | $usercfg->{groups}->{$group}->{users}->{$username} = 1; | |
433 | } | |
434 | ||
435 | sub delete_user_group { | |
436 | ||
437 | my ($username, $usercfg) = @_; | |
438 | ||
439 | foreach my $group (keys %{$usercfg->{groups}}) { | |
440 | ||
441 | delete ($usercfg->{groups}->{$group}->{users}->{$username}) | |
442 | if $usercfg->{groups}->{$group}->{users}->{$username}; | |
443 | } | |
444 | } | |
445 | ||
446 | sub delete_user_acl { | |
447 | ||
448 | my ($username, $usercfg) = @_; | |
449 | ||
450 | foreach my $acl (keys %{$usercfg->{acl}}) { | |
451 | ||
452 | delete ($usercfg->{acl}->{$acl}->{users}->{$username}) | |
453 | if $usercfg->{acl}->{$acl}->{users}->{$username}; | |
454 | } | |
455 | ||
456 | } | |
457 | sub delete_group_acl { | |
458 | ||
459 | my ($group, $usercfg) = @_; | |
460 | ||
461 | foreach my $acl (keys %{$usercfg->{acl}}) { | |
462 | ||
463 | delete ($usercfg->{acl}->{$acl}->{groups}->{$group}) | |
464 | if $usercfg->{acl}->{$acl}->{groups}->{$group}; | |
465 | } | |
466 | ||
467 | } | |
468 | ||
469 | # we automatically create some predefined roles by splitting privs | |
470 | # into 3 groups (per category) | |
471 | # root: only root is allowed to do that | |
472 | # admin: an administrator can to that | |
473 | # user: a normak user/customer can to that | |
474 | my $privgroups = { | |
475 | VM => { | |
476 | root => [], | |
477 | admin => [ | |
478 | 'VM.Modify', | |
479 | 'VM.Allocate', | |
480 | 'VM.Migrate', | |
481 | 'Permissions.Modify', | |
482 | ], | |
483 | user => [ | |
484 | 'VM.Console', | |
485 | 'VM.PowerMgmt', | |
486 | ], | |
487 | audit => [ | |
488 | 'VM.Audit' | |
489 | ], | |
490 | }, | |
491 | Sys => { | |
492 | root => [ | |
493 | 'Sys.PowerMgmt', | |
494 | 'Sys.Modify', # edit/change node settings | |
495 | ], | |
496 | admin => [ | |
497 | 'Sys.Console', | |
498 | 'Sys.Syslog', | |
499 | ], | |
500 | user => [], | |
501 | audit => [ | |
502 | 'Sys.Audit', | |
503 | ], | |
504 | }, | |
505 | Datastore => { | |
506 | root => [ | |
507 | 'Datastore.Allocate', | |
508 | 'Permissions.Modify', | |
509 | ], | |
510 | admin => [], | |
511 | user => [ | |
512 | 'Datastore.AllocateSpace', | |
513 | ], | |
514 | audit => [ | |
515 | 'Datastore.Audit', | |
516 | ], | |
517 | }, | |
518 | }; | |
519 | ||
520 | my $valid_privs = {}; | |
521 | ||
522 | my $special_roles = { | |
523 | 'NoAccess' => {}, # no priviledges | |
524 | 'Administrator' => $valid_privs, # all priviledges | |
525 | }; | |
526 | ||
527 | sub create_roles { | |
528 | ||
529 | foreach my $cat (keys %$privgroups) { | |
530 | my $cd = $privgroups->{$cat}; | |
531 | foreach my $p (@{$cd->{root}}, @{$cd->{admin}}, | |
532 | @{$cd->{user}}, @{$cd->{audit}}) { | |
533 | $valid_privs->{$p} = 1; | |
534 | } | |
535 | foreach my $p (@{$cd->{admin}}, @{$cd->{user}}, @{$cd->{audit}}) { | |
536 | ||
537 | $special_roles->{"PVE${cat}Admin"}->{$p} = 1; | |
538 | $special_roles->{"PVEAdmin"}->{$p} = 1; | |
539 | } | |
540 | if (scalar(@{$cd->{user}})) { | |
541 | foreach my $p (@{$cd->{user}}, @{$cd->{audit}}) { | |
542 | $special_roles->{"PVE${cat}User"}->{$p} = 1; | |
543 | } | |
544 | } | |
545 | foreach my $p (@{$cd->{audit}}) { | |
546 | $special_roles->{"PVEAuditor"}->{$p} = 1; | |
547 | } | |
548 | } | |
549 | }; | |
550 | ||
551 | create_roles(); | |
552 | ||
553 | my $valid_attributes = { | |
554 | ad => { | |
555 | server1 => '[\w\d]+(.[\w\d]+)*', | |
556 | server2 => '[\w\d]+(.[\w\d]+)*', | |
557 | domain => '\S+', | |
558 | port => '\d+', | |
559 | secure => '', | |
560 | comment => '.*', | |
561 | }, | |
562 | ldap => { | |
563 | server1 => '[\w\d]+(.[\w\d]+)*', | |
564 | server2 => '[\w\d]+(.[\w\d]+)*', | |
565 | base_dn => '\w+=[\w\s]+(,\s*\w+=[\w\s]+)*', | |
566 | user_attr => '\S{2,}', | |
567 | secure => '', | |
568 | port => '\d+', | |
569 | comment => '.*', | |
570 | } | |
571 | }; | |
572 | ||
573 | sub add_role_privs { | |
574 | my ($role, $usercfg, $privs) = @_; | |
575 | ||
576 | return if !$privs; | |
577 | ||
578 | die "role '$role' does not exist\n" if !$usercfg->{roles}->{$role}; | |
579 | ||
580 | foreach my $priv (split_list($privs)) { | |
581 | if (defined ($valid_privs->{$priv})) { | |
582 | $usercfg->{roles}->{$role}->{$priv} = 1; | |
583 | } else { | |
584 | die "invalid priviledge '$priv'\n"; | |
585 | } | |
586 | } | |
587 | } | |
588 | ||
589 | sub normalize_path { | |
590 | my $path = shift; | |
591 | ||
592 | $path =~ s|/+|/|; | |
593 | ||
594 | $path =~ s|/$||; | |
595 | ||
596 | $path = '/' if !$path; | |
597 | ||
598 | return undef if $path !~ m|^[[:alnum:]\-\_\/]+$|; | |
599 | ||
600 | return $path; | |
601 | } | |
602 | ||
603 | my $realm_regex = qr/[A-Za-z][A-Za-z0-9\.\-_]+/; | |
604 | ||
605 | sub pve_verify_realm { | |
606 | my ($realm, $noerr) = @_; | |
607 | ||
608 | if ($realm !~ m/^${realm_regex}$/) { | |
609 | return undef if $noerr; | |
610 | die "value does not look like a valid realm\n"; | |
611 | } | |
612 | return $realm; | |
613 | } | |
614 | ||
615 | PVE::JSONSchema::register_format('pve-userid', \&verify_username); | |
616 | sub verify_username { | |
617 | my ($username, $noerr) = @_; | |
618 | ||
619 | $username = '' if !$username; | |
620 | my $len = length($username); | |
621 | if ($len < 3) { | |
622 | die "user name '$username' is too short\n" if !$noerr; | |
623 | return undef; | |
624 | } | |
625 | if ($len > 64) { | |
626 | die "user name '$username' is too long ($len > 64)\n" if !$noerr; | |
627 | return undef; | |
628 | } | |
629 | ||
630 | # we only allow a limited set of characters (colon is not allowed, | |
631 | # because we store usernames in colon separated lists)! | |
632 | if ($username =~ m/^([^\s:]+)\@(${realm_regex})$/) { | |
633 | return wantarray ? ($username, $1, $2) : $username; | |
634 | } | |
635 | ||
636 | die "value '$username' does not look like a valid user name\n" if !$noerr; | |
637 | ||
638 | return undef; | |
639 | } | |
640 | PVE::JSONSchema::register_standard_option('userid', { | |
641 | description => "User ID", | |
642 | type => 'string', format => 'pve-userid', | |
643 | maxLength => 64, | |
644 | }); | |
645 | ||
646 | PVE::JSONSchema::register_standard_option('realm', { | |
647 | description => "Authentication domain ID", | |
648 | type => 'string', format => 'pve-configid', | |
649 | maxLength => 32, | |
650 | }); | |
651 | ||
652 | PVE::JSONSchema::register_format('pve-groupid', \&verify_groupname); | |
653 | sub verify_groupname { | |
654 | my ($groupname, $noerr) = @_; | |
655 | ||
656 | if ($groupname !~ m/^[A-Za-z0-9\.\-_]+$/) { | |
657 | ||
658 | die "group name '$groupname' contains invalid characters\n" if !$noerr; | |
659 | ||
660 | return undef; | |
661 | } | |
662 | ||
663 | return $groupname; | |
664 | } | |
665 | ||
666 | PVE::JSONSchema::register_format('pve-roleid', \&verify_rolename); | |
667 | sub verify_rolename { | |
668 | my ($rolename, $noerr) = @_; | |
669 | ||
670 | if ($rolename !~ m/^[A-Za-z0-9\.\-_]+$/) { | |
671 | ||
672 | die "role name '$rolename' contains invalid characters\n" if !$noerr; | |
673 | ||
674 | return undef; | |
675 | } | |
676 | ||
677 | return $rolename; | |
678 | } | |
679 | ||
680 | PVE::JSONSchema::register_format('pve-priv', \&verify_privname); | |
681 | sub verify_privname { | |
682 | my ($priv, $noerr) = @_; | |
683 | ||
684 | if (!$valid_privs->{$priv}) { | |
685 | die "invalid priviledge '$priv'\n" if !$noerr; | |
686 | ||
687 | return undef; | |
688 | } | |
689 | ||
690 | return $priv; | |
691 | } | |
692 | ||
693 | sub userconfig_force_defaults { | |
694 | my ($cfg) = @_; | |
695 | ||
696 | foreach my $r (keys %$special_roles) { | |
697 | $cfg->{roles}->{$r} = $special_roles->{$r}; | |
698 | } | |
699 | ||
700 | # fixme: remove 'root' group (not required)? | |
701 | ||
702 | # add root user | |
703 | $cfg->{users}->{'root@pam'}->{enable} = 1; | |
704 | } | |
705 | ||
706 | sub parse_user_config { | |
707 | my ($filename, $raw) = @_; | |
708 | ||
709 | my $cfg = {}; | |
710 | ||
711 | userconfig_force_defaults($cfg); | |
712 | ||
713 | while ($raw && $raw =~ s/^(.*?)(\n|$)//) { | |
714 | my $line = $1; | |
715 | ||
716 | next if $line =~ m/^\s*$/; # skip empty lines | |
717 | ||
718 | my @data; | |
719 | ||
720 | foreach my $d (split (/:/, $line)) { | |
721 | $d =~ s/^\s+//; | |
722 | $d =~ s/\s+$//; | |
723 | push @data, $d | |
724 | } | |
725 | ||
726 | my $et = shift @data; | |
727 | ||
728 | if ($et eq 'user') { | |
729 | my ($user, $enable, $expire, $firstname, $lastname, $email, $comment) = @data; | |
730 | ||
731 | my (undef, undef, $realm) = verify_username($user, 1); | |
732 | if (!$realm) { | |
733 | warn "user config - ignore user '$user' - invalid user name\n"; | |
734 | next; | |
735 | } | |
736 | ||
737 | $enable = $enable ? 1 : 0; | |
738 | ||
739 | $expire = 0 if !$expire; | |
740 | ||
741 | if ($expire !~ m/^\d+$/) { | |
742 | warn "user config - ignore user '$user' - (illegal characters in expire '$expire')\n"; | |
743 | next; | |
744 | } | |
745 | $expire = int($expire); | |
746 | ||
747 | #if (!verify_groupname ($group, 1)) { | |
748 | # warn "user config - ignore user '$user' - invalid characters in group name\n"; | |
749 | # next; | |
750 | #} | |
751 | ||
752 | $cfg->{users}->{$user} = { | |
753 | enable => $enable, | |
754 | # group => $group, | |
755 | }; | |
756 | $cfg->{users}->{$user}->{firstname} = PVE::Tools::decode_text($firstname) if $firstname; | |
757 | $cfg->{users}->{$user}->{lastname} = PVE::Tools::decode_text($lastname) if $lastname; | |
758 | $cfg->{users}->{$user}->{email} = $email; | |
759 | $cfg->{users}->{$user}->{comment} = PVE::Tools::decode_text($comment) if $comment; | |
760 | $cfg->{users}->{$user}->{expire} = $expire; | |
761 | ||
762 | #$cfg->{users}->{$user}->{groups}->{$group} = 1; | |
763 | #$cfg->{groups}->{$group}->{$user} = 1; | |
764 | ||
765 | } elsif ($et eq 'group') { | |
766 | my ($group, $userlist, $comment) = @data; | |
767 | ||
768 | if (!verify_groupname($group, 1)) { | |
769 | warn "user config - ignore group '$group' - invalid characters in group name\n"; | |
770 | next; | |
771 | } | |
772 | ||
773 | # make sure to add the group (even if there are no members) | |
774 | $cfg->{groups}->{$group} = { users => {} } if !$cfg->{groups}->{$group}; | |
775 | ||
776 | $cfg->{groups}->{$group}->{comment} = PVE::Tools::decode_text($comment) if $comment; | |
777 | ||
778 | foreach my $user (split_list($userlist)) { | |
779 | ||
780 | if (!verify_username($user, 1)) { | |
781 | warn "user config - ignore invalid group member '$user'\n"; | |
782 | next; | |
783 | } | |
784 | ||
785 | if ($cfg->{users}->{$user}) { # user exists | |
786 | $cfg->{users}->{$user}->{groups}->{$group} = 1; | |
787 | $cfg->{groups}->{$group}->{users}->{$user} = 1; | |
788 | } else { | |
789 | warn "user config - ignore invalid group member '$user'\n"; | |
790 | } | |
791 | } | |
792 | ||
793 | } elsif ($et eq 'role') { | |
794 | my ($role, $privlist) = @data; | |
795 | ||
796 | if (!verify_rolename($role, 1)) { | |
797 | warn "user config - ignore role '$role' - invalid characters in role name\n"; | |
798 | next; | |
799 | } | |
800 | ||
801 | # make sure to add the role (even if there are no privileges) | |
802 | $cfg->{roles}->{$role} = {} if !$cfg->{roles}->{$role}; | |
803 | ||
804 | foreach my $priv (split_list($privlist)) { | |
805 | if (defined ($valid_privs->{$priv})) { | |
806 | $cfg->{roles}->{$role}->{$priv} = 1; | |
807 | } else { | |
808 | warn "user config - ignore invalid priviledge '$priv'\n"; | |
809 | } | |
810 | } | |
811 | ||
812 | } elsif ($et eq 'acl') { | |
813 | my ($propagate, $pathtxt, $uglist, $rolelist) = @data; | |
814 | ||
815 | if (my $path = normalize_path($pathtxt)) { | |
816 | foreach my $role (split_list($rolelist)) { | |
817 | ||
818 | if (!verify_rolename($role, 1)) { | |
819 | warn "user config - ignore invalid role name '$role' in acl\n"; | |
820 | next; | |
821 | } | |
822 | ||
823 | foreach my $ug (split_list($uglist)) { | |
824 | if ($ug =~ m/^@(\w+)$/) { | |
825 | my $group = $1; | |
826 | if ($cfg->{groups}->{$group}) { # group exists | |
827 | $cfg->{acl}->{$path}->{groups}->{$group}->{$role} = $propagate; | |
828 | } else { | |
829 | warn "user config - ignore invalid acl group '$group'\n"; | |
830 | } | |
831 | } elsif (verify_username($ug, 1)) { | |
832 | if ($cfg->{users}->{$ug}) { # user exists | |
833 | $cfg->{acl}->{$path}->{users}->{$ug}->{$role} = $propagate; | |
834 | } else { | |
835 | warn "user config - ignore invalid acl member '$ug'\n"; | |
836 | } | |
837 | } else { | |
838 | warn "user config - invalid user/group '$ug' in acl\n"; | |
839 | } | |
840 | } | |
841 | } | |
842 | } else { | |
843 | warn "user config - ignore invalid path in acl '$pathtxt'\n"; | |
844 | } | |
845 | } else { | |
846 | warn "user config - ignore config line: $line\n"; | |
847 | } | |
848 | } | |
849 | ||
850 | userconfig_force_defaults($cfg); | |
851 | ||
852 | return $cfg; | |
853 | } | |
854 | ||
855 | sub parse_shadow_passwd { | |
856 | my ($filename, $raw) = @_; | |
857 | ||
858 | my $shadow = {}; | |
859 | ||
860 | while ($raw && $raw =~ s/^(.*?)(\n|$)//) { | |
861 | my $line = $1; | |
862 | ||
863 | next if $line =~ m/^\s*$/; # skip empty lines | |
864 | ||
865 | if ($line !~ m/^\S+:\S+:$/) { | |
866 | warn "pve shadow password: ignore invalid line $.\n"; | |
867 | next; | |
868 | } | |
869 | ||
870 | my ($userid, $crypt_pass) = split (/:/, $line); | |
871 | $shadow->{users}->{$userid}->{shadow} = $crypt_pass; | |
872 | } | |
873 | ||
874 | return $shadow; | |
875 | } | |
876 | ||
877 | sub write_domains { | |
878 | my ($filename, $cfg) = @_; | |
879 | ||
880 | my $data = ''; | |
881 | ||
882 | my $wrote_default; | |
883 | ||
884 | foreach my $realm (sort keys %$cfg) { | |
885 | my $entry = $cfg->{$realm}; | |
886 | my $type = lc($entry->{type}); | |
887 | ||
888 | next if !$type; | |
889 | ||
890 | next if ($type eq 'pam') || ($type eq 'pve'); | |
891 | ||
892 | my $formats = $valid_attributes->{$type}; | |
893 | next if !$formats; | |
894 | ||
895 | $data .= "$type: $realm\n"; | |
896 | ||
897 | foreach my $k (sort keys %$entry) { | |
898 | next if $k eq 'type'; | |
899 | my $v = $entry->{$k}; | |
900 | if ($k eq 'default') { | |
901 | $data .= "\t$k\n" if $v && !$wrote_default; | |
902 | $wrote_default = 1; | |
903 | } elsif (defined($formats->{$k})) { | |
904 | if (!$formats->{$k}) { | |
905 | $data .= "\t$k\n" if $v; | |
906 | } elsif ($v =~ m/^$formats->{$k}$/) { | |
907 | $v = PVE::Tools::encode_text($v) if $k eq 'comment'; | |
908 | $data .= "\t$k $v\n"; | |
909 | } else { | |
910 | die "invalid value '$v' for attribute '$k'\n"; | |
911 | } | |
912 | } else { | |
913 | die "invalid attribute '$k' - not supported\n"; | |
914 | } | |
915 | } | |
916 | ||
917 | $data .= "\n"; | |
918 | } | |
919 | ||
920 | return $data; | |
921 | } | |
922 | ||
923 | sub parse_domains { | |
924 | my ($filename, $raw) = @_; | |
925 | ||
926 | my $cfg = {}; | |
927 | ||
928 | my $default; | |
929 | ||
930 | while ($raw && $raw =~ s/^(.*?)(\n|$)//) { | |
931 | my $line = $1; | |
932 | ||
933 | next if $line =~ m/^\#/; # skip comment lines | |
934 | next if $line =~ m/^\s*$/; # skip empty lines | |
935 | ||
936 | if ($line =~ m/^(\S+):\s*(\S+)\s*$/) { | |
937 | my $realm = $2; | |
938 | my $type = lc($1); | |
939 | ||
940 | my $ignore = 0; | |
941 | my $entry; | |
942 | ||
943 | my $formats = $valid_attributes->{$type}; | |
944 | if (!$formats) { | |
945 | $ignore = 1; | |
946 | warn "ignoring domain '$realm' - (unsupported authentication type '$type')\n"; | |
947 | } elsif (!pve_verify_realm($realm, 1)) { | |
948 | $ignore = 1; | |
949 | warn "ignoring domain '$realm' - (illegal characters)\n"; | |
950 | } else { | |
951 | $entry = { type => $type }; | |
952 | } | |
953 | ||
954 | while ($raw && $raw =~ s/^(.*?)(\n|$)//) { | |
955 | $line = $1; | |
956 | ||
957 | next if $line =~ m/^\#/; #skip comment lines | |
958 | last if $line =~ m/^\s*$/; | |
959 | ||
960 | next if $ignore; # skip | |
961 | ||
962 | if ($line =~ m/^\s+(default)\s*$/) { | |
963 | $default = $realm if !$default; | |
964 | } elsif ($line =~ m/^\s+(\S+)(\s+(.*\S))?\s*$/) { | |
965 | my ($k, $v) = (lc($1), $3); | |
966 | if (defined($formats->{$k})) { | |
967 | if (!$formats->{$k} && !defined($v)) { | |
968 | $entry->{$k} = 1; | |
969 | } elsif ($formats->{$k} && $v =~ m/^$formats->{$k}$/) { | |
970 | if (!defined($entry->{$k})) { | |
971 | $v = PVE::Tools::decode_text($v) if $k eq 'comment'; | |
972 | $entry->{$k} = $v; | |
973 | } else { | |
974 | warn "ignoring duplicate attribute '$k $v'\n"; | |
975 | } | |
976 | } else { | |
977 | warn "ignoring value '$v' for attribute '$k' - invalid format\n"; | |
978 | } | |
979 | } else { | |
980 | warn "ignoring attribute '$k' - not supported\n"; | |
981 | } | |
982 | } else { | |
983 | warn "ignore config line: $line\n"; | |
984 | } | |
985 | } | |
986 | ||
987 | if ($entry->{server2} && !$entry->{server1}) { | |
988 | $entry->{server1} = $entry->{server2}; | |
989 | delete $entry->{server2}; | |
990 | } | |
991 | ||
992 | if ($ignore) { | |
993 | # do nothing | |
994 | } elsif (!$entry->{server1}) { | |
995 | warn "ignoring domain '$realm' - missing server attribute\n"; | |
996 | } elsif (($entry->{type} eq "ldap") && !$entry->{user_attr}) { | |
997 | warn "ignoring domain '$realm' - missing user attribute\n"; | |
998 | } elsif (($entry->{type} eq "ldap") && !$entry->{base_dn}) { | |
999 | warn "ignoring domain '$realm' - missing base_dn attribute\n"; | |
1000 | } elsif (($entry->{type} eq "ad") && !$entry->{domain}) { | |
1001 | warn "ignoring domain '$realm' - missing domain attribute\n"; | |
1002 | } else { | |
1003 | $cfg->{$realm} = $entry; | |
1004 | } | |
1005 | ||
1006 | } else { | |
1007 | warn "ignore config line: $line\n"; | |
1008 | } | |
1009 | } | |
1010 | ||
1011 | $cfg->{$default}->{default} = 1 if $default; | |
1012 | ||
1013 | # add default domains | |
1014 | ||
1015 | $cfg->{pve} = { | |
1016 | type => 'builtin', | |
1017 | comment => "Proxmox VE authentication server", | |
1018 | }; | |
1019 | ||
1020 | $cfg->{pam} = { | |
1021 | type => 'builtin', | |
1022 | comment => "Linux PAM standard authentication", | |
1023 | }; | |
1024 | ||
1025 | return $cfg; | |
1026 | } | |
1027 | ||
1028 | sub write_shadow_config { | |
1029 | my ($filename, $cfg) = @_; | |
1030 | ||
1031 | my $data = ''; | |
1032 | foreach my $userid (keys %{$cfg->{users}}) { | |
1033 | my $crypt_pass = $cfg->{users}->{$userid}->{shadow}; | |
1034 | $data .= "$userid:$crypt_pass:\n"; | |
1035 | } | |
1036 | ||
1037 | return $data | |
1038 | } | |
1039 | ||
1040 | sub write_user_config { | |
1041 | my ($filename, $cfg) = @_; | |
1042 | ||
1043 | my $data = ''; | |
1044 | ||
1045 | foreach my $user (keys %{$cfg->{users}}) { | |
1046 | my $d = $cfg->{users}->{$user}; | |
1047 | my $firstname = $d->{firstname} ? PVE::Tools::encode_text($d->{firstname}) : ''; | |
1048 | my $lastname = $d->{lastname} ? PVE::Tools::encode_text($d->{lastname}) : ''; | |
1049 | my $email = $d->{email} || ''; | |
1050 | my $comment = $d->{comment} ? PVE::Tools::encode_text($d->{comment}) : ''; | |
1051 | my $expire = int($d->{expire} || 0); | |
1052 | my $enable = $d->{enable} ? 1 : 0; | |
1053 | $data .= "user:$user:$enable:$expire:$firstname:$lastname:$email:$comment:\n"; | |
1054 | } | |
1055 | ||
1056 | $data .= "\n"; | |
1057 | ||
1058 | foreach my $group (keys %{$cfg->{groups}}) { | |
1059 | my $d = $cfg->{groups}->{$group}; | |
1060 | my $list = join (',', keys %{$d->{users}}); | |
1061 | my $comment = $d->{comment} ? PVE::Tools::encode_text($d->{comment}) : ''; | |
1062 | $data .= "group:$group:$list:$comment:\n"; | |
1063 | } | |
1064 | ||
1065 | $data .= "\n"; | |
1066 | ||
1067 | foreach my $role (keys %{$cfg->{roles}}) { | |
1068 | next if $special_roles->{$role}; | |
1069 | ||
1070 | my $d = $cfg->{roles}->{$role}; | |
1071 | my $list = join (',', keys %$d); | |
1072 | $data .= "role:$role:$list:\n"; | |
1073 | } | |
1074 | ||
1075 | $data .= "\n"; | |
1076 | ||
1077 | foreach my $path (sort keys %{$cfg->{acl}}) { | |
1078 | my $d = $cfg->{acl}->{$path}; | |
1079 | ||
1080 | my $ra = {}; | |
1081 | ||
1082 | foreach my $group (keys %{$d->{groups}}) { | |
1083 | my $l0 = ''; | |
1084 | my $l1 = ''; | |
1085 | foreach my $role (sort keys %{$d->{groups}->{$group}}) { | |
1086 | my $propagate = $d->{groups}->{$group}->{$role}; | |
1087 | if ($propagate) { | |
1088 | $l1 .= ',' if $l1; | |
1089 | $l1 .= $role; | |
1090 | } else { | |
1091 | $l0 .= ',' if $l0; | |
1092 | $l0 .= $role; | |
1093 | } | |
1094 | } | |
1095 | $ra->{0}->{$l0}->{"\@$group"} = 1 if $l0; | |
1096 | $ra->{1}->{$l1}->{"\@$group"} = 1 if $l1; | |
1097 | } | |
1098 | ||
1099 | foreach my $user (keys %{$d->{users}}) { | |
1100 | # no need to save, because root is always 'Administartor' | |
1101 | next if $user eq 'root@pam'; | |
1102 | ||
1103 | my $l0 = ''; | |
1104 | my $l1 = ''; | |
1105 | foreach my $role (sort keys %{$d->{users}->{$user}}) { | |
1106 | my $propagate = $d->{users}->{$user}->{$role}; | |
1107 | if ($propagate) { | |
1108 | $l1 .= ',' if $l1; | |
1109 | $l1 .= $role; | |
1110 | } else { | |
1111 | $l0 .= ',' if $l0; | |
1112 | $l0 .= $role; | |
1113 | } | |
1114 | } | |
1115 | $ra->{0}->{$l0}->{$user} = 1 if $l0; | |
1116 | $ra->{1}->{$l1}->{$user} = 1 if $l1; | |
1117 | } | |
1118 | ||
1119 | foreach my $rolelist (sort keys %{$ra->{0}}) { | |
1120 | my $uglist = join (',', keys %{$ra->{0}->{$rolelist}}); | |
1121 | $data .= "acl:0:$path:$uglist:$rolelist:\n"; | |
1122 | } | |
1123 | foreach my $rolelist (sort keys %{$ra->{1}}) { | |
1124 | my $uglist = join (',', keys %{$ra->{1}->{$rolelist}}); | |
1125 | $data .= "acl:1:$path:$uglist:$rolelist:\n"; | |
1126 | } | |
1127 | } | |
1128 | ||
1129 | return $data; | |
1130 | } | |
1131 | ||
1132 | sub roles { | |
1133 | my ($cfg, $user, $path) = @_; | |
1134 | ||
1135 | return 'Administrator' if $user eq 'root@pam'; # root can do anything | |
1136 | ||
1137 | my $perm = {}; | |
1138 | ||
1139 | foreach my $p (sort keys %{$cfg->{acl}}) { | |
1140 | my $final = ($path eq $p); | |
1141 | ||
1142 | next if !(($p eq '/') || $final || ($path =~ m|^$p/|)); | |
1143 | ||
1144 | my $acl = $cfg->{acl}->{$p}; | |
1145 | ||
1146 | #print "CHECKACL $path $p\n"; | |
1147 | #print "ACL $path = " . Dumper ($acl); | |
1148 | ||
1149 | if (my $ri = $acl->{users}->{$user}) { | |
1150 | my $new; | |
1151 | foreach my $role (keys %$ri) { | |
1152 | my $propagate = $ri->{$role}; | |
1153 | if ($final || $propagate) { | |
1154 | #print "APPLY ROLE $p $user $role\n"; | |
1155 | $new = {} if !$new; | |
1156 | $new->{$role} = 1; | |
1157 | } | |
1158 | } | |
1159 | if ($new) { | |
1160 | $perm = $new; # overwrite previous settings | |
1161 | next; # user privs always override group privs | |
1162 | } | |
1163 | } | |
1164 | ||
1165 | my $new; | |
1166 | foreach my $g (keys %{$acl->{groups}}) { | |
1167 | next if !$cfg->{groups}->{$g}->{users}->{$user}; | |
1168 | if (my $ri = $acl->{groups}->{$g}) { | |
1169 | foreach my $role (keys %$ri) { | |
1170 | my $propagate = $ri->{$role}; | |
1171 | if ($final || $propagate) { | |
1172 | #print "APPLY ROLE $p \@$g $role\n"; | |
1173 | $new = {} if !$new; | |
1174 | $new->{$role} = 1; | |
1175 | } | |
1176 | } | |
1177 | } | |
1178 | } | |
1179 | if ($new) { | |
1180 | $perm = $new; # overwrite previous settings | |
1181 | next; | |
1182 | } | |
1183 | ||
1184 | #die "what herea?"; | |
1185 | } | |
1186 | ||
1187 | my $res = {}; | |
1188 | if (!defined ($perm->{NoAccess})) { | |
1189 | $res = $perm; | |
1190 | } | |
1191 | ||
1192 | #print "permission $user $path = " . Dumper ($perm); | |
1193 | ||
1194 | my @ra = keys %$res; | |
1195 | ||
1196 | #print "roles $user $path = " . join (',', @ra) . "\n"; | |
1197 | ||
1198 | return @ra; | |
1199 | } | |
1200 | ||
1201 | sub permission { | |
1202 | my ($cfg, $user, $path) = @_; | |
1203 | ||
1204 | $user = verify_username($user, 1); | |
1205 | return {} if !$user; | |
1206 | ||
1207 | my @ra = roles($cfg, $user, $path); | |
1208 | ||
1209 | my $privs = {}; | |
1210 | ||
1211 | foreach my $role (@ra) { | |
1212 | if (my $privset = $cfg->{roles}->{$role}) { | |
1213 | foreach my $p (keys %$privset) { | |
1214 | $privs->{$p} = 1; | |
1215 | } | |
1216 | } | |
1217 | } | |
1218 | ||
1219 | #print "priviledges $user $path = " . Dumper ($privs); | |
1220 | ||
1221 | return $privs; | |
1222 | } | |
1223 | ||
1224 | sub check_permissions { | |
1225 | my ($username, $path, $privlist) = @_; | |
1226 | ||
1227 | $path = normalize_path($path); | |
1228 | my $usercfg = cfs_read_file('user.cfg'); | |
1229 | my $perm = permission($usercfg, $username, $path); | |
1230 | ||
1231 | foreach my $priv (split_list($privlist)) { | |
1232 | return undef if !$perm->{$priv}; | |
1233 | }; | |
1234 | ||
1235 | return 1; | |
1236 | } | |
1237 | ||
1238 | 1; |