src/PVE/AccessControl.pm

   1 package PVE::AccessControl;
   2
   3 use strict;
   4 use warnings;
   5 use Encode;
   6 use Crypt::OpenSSL::Random;
   7 use Crypt::OpenSSL::RSA;
   8 use Net::SSLeay;
   9 use Net::IP;
  10 use MIME::Base32;
  11 use MIME::Base64;
  12 use Digest::SHA;
  13 use IO::File;
  14 use File::stat;
  15 use JSON;
  16 use Scalar::Util 'weaken';
  17 use URI::Escape;
  18
  19 use PVE::OTP;
  20 use PVE::Ticket;
  21 use PVE::Tools qw(run_command lock_file file_get_contents split_list safe_print);
  22 use PVE::Cluster qw(cfs_register_file cfs_read_file cfs_write_file cfs_lock_file);
  23 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  24
  25 use PVE::RS::TFA;
  26
  27 use PVE::Auth::Plugin;
  28 use PVE::Auth::AD;
  29 use PVE::Auth::LDAP;
  30 use PVE::Auth::PVE;
  31 use PVE::Auth::PAM;
  32 use PVE::Auth::OpenId;
  33
  34 # load and initialize all plugins
  35
  36 PVE::Auth::AD->register();
  37 PVE::Auth::LDAP->register();
  38 PVE::Auth::PVE->register();
  39 PVE::Auth::PAM->register();
  40 PVE::Auth::OpenId->register();
  41 PVE::Auth::Plugin->init();
  42
  43 # $authdir must be writable by root only!
  44 my $confdir = "/etc/pve";
  45 my $authdir = "$confdir/priv";
  46
  47 my $pve_www_key_fn = "$confdir/pve-www.key";
  48
  49 my $pve_auth_key_files = {
  50     priv => "$authdir/authkey.key",
  51     pub =>  "$confdir/authkey.pub",
  52     pubold => "$confdir/authkey.pub.old",
  53 };
  54
  55 my $pve_auth_key_cache = {};
  56
  57 my $ticket_lifetime = 3600 * 2; # 2 hours
  58 my $auth_graceperiod = 60 * 5; # 5 minutes
  59 my $authkey_lifetime = 3600 * 24; # rotate every 24 hours
  60
  61 Crypt::OpenSSL::RSA->import_random_seed();
  62
  63 cfs_register_file('user.cfg', \&parse_user_config, \&write_user_config);
  64 cfs_register_file('priv/tfa.cfg', \&parse_priv_tfa_config, \&write_priv_tfa_config);
  65
  66 sub verify_username {
  67     PVE::Auth::Plugin::verify_username(@_);
  68 }
  69
  70 sub pve_verify_realm {
  71     PVE::Auth::Plugin::pve_verify_realm(@_);
  72 }
  73
  74 # Locking both config files together is only ever allowed in one order:
  75 #  1) tfa config
  76 #  2) user config
  77 # If we permit the other way round, too, we might end up deadlocking!
  78 my $user_config_locked;
  79 sub lock_user_config {
  80     my ($code, $errmsg) = @_;
  81
  82     my $locked = 1;
  83     $user_config_locked = \$locked;
  84     weaken $user_config_locked; # make this scope guard signal safe...
  85
  86     cfs_lock_file("user.cfg", undef, $code);
  87     $user_config_locked = undef;
  88     if (my $err = $@) {
  89         $errmsg ? die "$errmsg: $err" : die $err;
  90     }
  91 }
  92
  93 sub lock_tfa_config {
  94     my ($code, $errmsg) = @_;
  95
  96     die "tfa config lock cannot be acquired while holding user config lock\n"
  97         if ($user_config_locked && $$user_config_locked);
  98
  99     my $res = cfs_lock_file("priv/tfa.cfg", undef, $code);
 100     if (my $err = $@) {
 101         $errmsg ? die "$errmsg: $err" : die $err;
 102     }
 103
 104     return $res;
 105 }
 106
 107 my $cache_read_key = sub {
 108     my ($type) = @_;
 109
 110     my $path = $pve_auth_key_files->{$type};
 111
 112     my $read_key_and_mtime = sub {
 113         my $fh = IO::File->new($path, "r");
 114
 115         return undef if !defined($fh);
 116
 117         my $st = stat($fh);
 118         my $pem = PVE::Tools::safe_read_from($fh, 0, 0, $path);
 119
 120         close $fh;
 121
 122         my $key;
 123         if ($type eq 'pub' || $type eq 'pubold') {
 124             $key = eval { Crypt::OpenSSL::RSA->new_public_key($pem); };
 125         } elsif ($type eq 'priv') {
 126             $key = eval { Crypt::OpenSSL::RSA->new_private_key($pem); };
 127         } else {
 128             die "Invalid authkey type '$type'\n";
 129         }
 130
 131         return { key => $key, mtime => $st->mtime };
 132     };
 133
 134     if (!defined($pve_auth_key_cache->{$type})) {
 135         $pve_auth_key_cache->{$type} = $read_key_and_mtime->();
 136     } else {
 137         my $st = stat($path);
 138         if (!$st || $st->mtime != $pve_auth_key_cache->{$type}->{mtime}) {
 139             $pve_auth_key_cache->{$type} = $read_key_and_mtime->();
 140         }
 141     }
 142
 143     return $pve_auth_key_cache->{$type};
 144 };
 145
 146 sub get_pubkey {
 147     my ($old) = @_;
 148
 149     my $type = $old ? 'pubold' : 'pub';
 150
 151     my $res = $cache_read_key->($type);
 152     return undef if !defined($res);
 153
 154     return wantarray ? ($res->{key}, $res->{mtime}) : $res->{key};
 155 }
 156
 157 sub get_privkey {
 158     my $res = $cache_read_key->('priv');
 159
 160     if (!defined($res) || !check_authkey(1)) {
 161         rotate_authkey();
 162         $res = $cache_read_key->('priv');
 163     }
 164
 165     return wantarray ? ($res->{key}, $res->{mtime}) : $res->{key};
 166 }
 167
 168 sub check_authkey {
 169     my ($quiet) = @_;
 170
 171     # skip check if non-quorate, as rotation is not possible anyway
 172     return 1 if !PVE::Cluster::check_cfs_quorum(1);
 173
 174     my ($pub_key, $mtime) = get_pubkey();
 175     if (!$pub_key) {
 176         warn "auth key pair missing, generating new one..\n"  if !$quiet;
 177         return 0;
 178     } else {
 179         my $now = time();
 180         if ($now - $mtime >= $authkey_lifetime) {
 181             warn "auth key pair too old, rotating..\n" if !$quiet;;
 182             return 0;
 183         } elsif ($mtime > $now + $auth_graceperiod) {
 184             # a nodes RTC had a time set in the future during key generation -> ticket
 185             # validity is clamped to 0+5 min grace period until now >= mtime again
 186             my (undef, $old_mtime) = get_pubkey(1);
 187             if ($old_mtime && $mtime >= $old_mtime && $mtime - $old_mtime < $ticket_lifetime) {
 188                 warn "auth key pair generated in the future (key $mtime > host $now),"
 189                     ." but old key still exists and in valid grace period so avoid automatic"
 190                     ." fixup. Cluster time not in sync?\n" if !$quiet;
 191                 return 1;
 192             }
 193             warn "auth key pair generated in the future (key $mtime > host $now), rotating..\n" if !$quiet;
 194             return 0;
 195         } else {
 196             warn "auth key new enough, skipping rotation\n" if !$quiet;;
 197             return 1;
 198         }
 199     }
 200 }
 201
 202 sub rotate_authkey {
 203     return if $authkey_lifetime == 0;
 204
 205     PVE::Cluster::cfs_lock_authkey(undef, sub {
 206         # stat() calls might be answered from the kernel page cache for up to
 207         # 1s, so this special dance is needed to avoid a double rotation in
 208         # clusters *despite* the cfs_lock context..
 209
 210         # drop in-process cache hash
 211         $pve_auth_key_cache = {};
 212         # force open/close of file to invalidate page cache entry
 213         get_pubkey();
 214         # now re-check with lock held and page cache invalidated so that stat()
 215         # does the right thing, and any key updates by other nodes are visible.
 216         return if check_authkey();
 217
 218         my $old = get_pubkey();
 219         my $new = Crypt::OpenSSL::RSA->generate_key(2048);
 220
 221         if ($old) {
 222             eval {
 223                 my $pem = $old->get_public_key_x509_string();
 224                 # mtime is used for caching and ticket age range calculation
 225                 PVE::Tools::file_set_contents($pve_auth_key_files->{pubold}, $pem);
 226             };
 227             die "Failed to store old auth key: $@\n" if $@;
 228         }
 229
 230         eval {
 231             my $pem = $new->get_public_key_x509_string();
 232             # mtime is used for caching and ticket age range calculation,
 233             # should be close to that of pubold above
 234             PVE::Tools::file_set_contents($pve_auth_key_files->{pub}, $pem);
 235         };
 236         if ($@) {
 237             if ($old) {
 238                 warn "Failed to store new auth key - $@\n";
 239                 warn "Reverting to previous auth key\n";
 240                 eval {
 241                     my $pem = $old->get_public_key_x509_string();
 242                     PVE::Tools::file_set_contents($pve_auth_key_files->{pub}, $pem);
 243                 };
 244                 die "Failed to restore old auth key: $@\n" if $@;
 245             } else {
 246                 die "Failed to store new auth key - $@\n";
 247             }
 248         }
 249
 250         eval {
 251             my $pem = $new->get_private_key_string();
 252             PVE::Tools::file_set_contents($pve_auth_key_files->{priv}, $pem);
 253         };
 254         if ($@) {
 255             warn "Failed to store new auth key - $@\n";
 256             warn "Deleting auth key to force regeneration\n";
 257             unlink $pve_auth_key_files->{pub};
 258             unlink $pve_auth_key_files->{priv};
 259         }
 260     });
 261     die $@ if $@;
 262 }
 263
 264 PVE::JSONSchema::register_standard_option('tokenid', {
 265     description => "API token identifier.",
 266     type => "string",
 267     format => "pve-tokenid",
 268 });
 269
 270 our $token_subid_regex = $PVE::Auth::Plugin::realm_regex;
 271
 272 # username@realm username realm tokenid
 273 our $token_full_regex = qr/((${PVE::Auth::Plugin::user_regex})\@(${PVE::Auth::Plugin::realm_regex}))!(${token_subid_regex})/;
 274
 275 our $userid_or_token_regex = qr/^$PVE::Auth::Plugin::user_regex\@$PVE::Auth::Plugin::realm_regex(?:!$token_subid_regex)?$/;
 276
 277 sub split_tokenid {
 278     my ($tokenid, $noerr) = @_;
 279
 280     if ($tokenid =~ /^${token_full_regex}$/) {
 281         return ($1, $4);
 282     }
 283
 284     die "'$tokenid' is not a valid token ID - not able to split into user and token parts\n" if !$noerr;
 285
 286     return undef;
 287 }
 288
 289 sub join_tokenid {
 290     my ($username, $tokensubid) = @_;
 291
 292     my $joined = "${username}!${tokensubid}";
 293
 294     return pve_verify_tokenid($joined);
 295 }
 296
 297 PVE::JSONSchema::register_format('pve-tokenid', \&pve_verify_tokenid);
 298 sub pve_verify_tokenid {
 299     my ($tokenid, $noerr) = @_;
 300
 301     if ($tokenid =~ /^${token_full_regex}$/) {
 302         return wantarray ? ($tokenid, $2, $3, $4) : $tokenid;
 303     }
 304
 305     die "value '$tokenid' does not look like a valid token ID\n" if !$noerr;
 306
 307     return undef;
 308 }
 309
 310
 311 my $csrf_prevention_secret;
 312 my $csrf_prevention_secret_legacy;
 313 my $get_csrfr_secret = sub {
 314     if (!$csrf_prevention_secret) {
 315         my $input = PVE::Tools::file_get_contents($pve_www_key_fn);
 316         $csrf_prevention_secret = Digest::SHA::hmac_sha256_base64($input);
 317         $csrf_prevention_secret_legacy = Digest::SHA::sha1_base64($input);
 318     }
 319     return $csrf_prevention_secret;
 320 };
 321
 322 sub assemble_csrf_prevention_token {
 323     my ($username) = @_;
 324
 325     my $secret =  &$get_csrfr_secret();
 326
 327     return PVE::Ticket::assemble_csrf_prevention_token ($secret, $username);
 328 }
 329
 330 sub verify_csrf_prevention_token {
 331     my ($username, $token, $noerr) = @_;
 332
 333     my $secret = $get_csrfr_secret->();
 334
 335     # FIXME: remove with PVE 7 and/or refactor all into PVE::Ticket ?
 336     if ($token =~ m/^([A-Z0-9]{8}):(\S+)$/) {
 337         my $sig = $2;
 338         if (length($sig) == 27) {
 339             # the legacy secret got populated by above get_csrfr_secret call
 340             $secret = $csrf_prevention_secret_legacy;
 341         }
 342     }
 343
 344     return PVE::Ticket::verify_csrf_prevention_token(
 345         $secret, $username, $token, -$auth_graceperiod, $ticket_lifetime, $noerr);
 346 }
 347
 348 my $get_ticket_age_range = sub {
 349     my ($now, $mtime, $rotated) = @_;
 350
 351     my $key_age = $now - $mtime;
 352     $key_age = 0 if $key_age < 0;
 353
 354     my $min = -$auth_graceperiod;
 355     my $max = $ticket_lifetime;
 356
 357     if ($rotated) {
 358         # ticket creation after rotation is not allowed
 359         $min = $key_age - $auth_graceperiod;
 360     } else {
 361         if ($key_age > $authkey_lifetime && $authkey_lifetime > 0) {
 362             if (PVE::Cluster::check_cfs_quorum(1)) {
 363                 # key should have been rotated, clamp range accordingly
 364                 $min = $key_age - $authkey_lifetime;
 365             } else {
 366                 warn "Cluster not quorate - extending auth key lifetime!\n";
 367             }
 368         }
 369
 370         $max = $key_age + $auth_graceperiod if $key_age < $ticket_lifetime;
 371     }
 372
 373     return undef if $min > $ticket_lifetime;
 374     return ($min, $max);
 375 };
 376
 377 sub assemble_ticket : prototype($;$) {
 378     my ($data, $aad) = @_;
 379
 380     my $rsa_priv = get_privkey();
 381
 382     return PVE::Ticket::assemble_rsa_ticket($rsa_priv, 'PVE', $data, $aad);
 383 }
 384
 385 # Returns the username, "age" and tfa info.
 386 #
 387 # Note that for the new-style outh, tfa info is never set, as it only uses the `/ticket` api call
 388 # via the new 'tfa-challenge' parameter, so this part can go with PVE-8.
 389 #
 390 # New-style auth still uses this function, but sets `$tfa_ticket` to true when validating the tfa
 391 # ticket.
 392 sub verify_ticket : prototype($;$$) {
 393     my ($ticket, $noerr, $tfa_ticket_aad) = @_;
 394
 395     my $now = time();
 396
 397     my $check = sub {
 398         my ($old) = @_;
 399
 400         my ($rsa_pub, $rsa_mtime) = get_pubkey($old);
 401         return undef if !$rsa_pub;
 402
 403         my ($min, $max) = $get_ticket_age_range->($now, $rsa_mtime, $old);
 404         return undef if !defined($min);
 405
 406         return PVE::Ticket::verify_rsa_ticket(
 407             $rsa_pub, 'PVE', $ticket, $tfa_ticket_aad, $min, $max, 1);
 408     };
 409
 410     my ($data, $age) = $check->();
 411
 412     # check with old, rotated key if current key failed
 413     ($data, $age) = $check->(1) if !defined($data);
 414
 415     my $auth_failure = sub {
 416         if ($noerr) {
 417             return undef;
 418         } else {
 419             # raise error via undef ticket
 420             PVE::Ticket::verify_rsa_ticket(undef, 'PVE');
 421         }
 422     };
 423
 424     if (!defined($data)) {
 425         return $auth_failure->();
 426     }
 427
 428     if ($tfa_ticket_aad) {
 429         # We're validating a ticket-call's 'tfa-challenge' parameter, so just return its data.
 430         if ($data =~ /^!tfa!(.*)$/) {
 431             return $1;
 432         }
 433         die "bad ticket\n";
 434     }
 435
 436     my ($username, $tfa_info);
 437     if ($data =~ /^!tfa!(.*)$/) {
 438         # PBS style half-authenticated ticket, contains a json string form of a `TfaChallenge`
 439         # object.
 440         # This type of ticket does not contain the user name.
 441         return { type => 'new', data => $1 };
 442     }
 443     if ($data =~ m{^u2f!([^!]+)!([0-9a-zA-Z/.=_\-+]+)$}) {
 444         # Ticket for u2f-users:
 445         ($username, my $challenge) = ($1, $2);
 446         if ($challenge eq 'verified') {
 447             # u2f challenge was completed
 448             $challenge = undef;
 449         } elsif (!wantarray) {
 450             # The caller is not aware there could be an ongoing challenge,
 451             # so we treat this ticket as invalid:
 452             return $auth_failure->();
 453         }
 454         $tfa_info = {
 455             type => 'u2f',
 456             challenge => $challenge,
 457         };
 458     } elsif ($data =~ /^tfa!(.*)$/) {
 459         # TOTP and Yubico don't require a challenge so this is the generic
 460         # 'missing 2nd factor ticket'
 461         $username = $1;
 462         $tfa_info = { type => 'tfa' };
 463     } else {
 464         # Regular ticket (full access)
 465         $username = $data;
 466     }
 467
 468     return undef if !PVE::Auth::Plugin::verify_username($username, $noerr);
 469
 470     return wantarray ? ($username, $age, $tfa_info) : $username;
 471 }
 472
 473 sub verify_token {
 474     my ($api_token) = @_;
 475
 476     die "no API token specified\n" if !$api_token;
 477
 478     my ($tokenid, $value);
 479     if ($api_token =~ /^(.*)=(.*)$/) {
 480         $tokenid = $1;
 481         $value = $2;
 482     } else {
 483         die "no tokenid specified\n";
 484     }
 485
 486     my ($username, $token) = split_tokenid($tokenid);
 487
 488     my $usercfg = cfs_read_file('user.cfg');
 489     check_user_enabled($usercfg, $username);
 490     check_token_exist($usercfg, $username, $token);
 491
 492     my $user = $usercfg->{users}->{$username};
 493     my $token_info = $user->{tokens}->{$token};
 494
 495     my $ctime = time();
 496     die "token '$token' access expired\n" if $token_info->{expire} && ($token_info->{expire} < $ctime);
 497
 498     die "invalid token value!\n" if !PVE::Cluster::verify_token($tokenid, $value);
 499
 500     return wantarray ? ($tokenid) : $tokenid;
 501 }
 502
 503 my $assemble_short_lived_ticket = sub {
 504     my ($prefix, $username, $path) = @_;
 505
 506     my $rsa_priv = get_privkey();
 507
 508     $path = normalize_path($path);
 509
 510     die "invalid ticket path\n" if !defined($path);
 511
 512     my $secret_data = "$username:$path";
 513
 514     return PVE::Ticket::assemble_rsa_ticket(
 515         $rsa_priv, $prefix, undef, $secret_data);
 516 };
 517
 518 my $verify_short_lived_ticket = sub {
 519     my ($ticket, $prefix, $username, $path, $noerr) = @_;
 520
 521     $path = normalize_path($path);
 522
 523     die "invalid ticket path\n" if !defined($path);
 524
 525     my $secret_data = "$username:$path";
 526
 527     my ($rsa_pub, $rsa_mtime) = get_pubkey();
 528     if (!$rsa_pub || (time() - $rsa_mtime > $authkey_lifetime && $authkey_lifetime > 0)) {
 529         if ($noerr) {
 530             return undef;
 531         } else {
 532             # raise error via undef ticket
 533             PVE::Ticket::verify_rsa_ticket($rsa_pub, $prefix);
 534         }
 535     }
 536
 537     return PVE::Ticket::verify_rsa_ticket(
 538         $rsa_pub, $prefix, $ticket, $secret_data, -20, 40, $noerr);
 539 };
 540
 541 # VNC tickets
 542 # - they do not contain the username in plain text
 543 # - they are restricted to a specific resource path (example: '/vms/100')
 544 sub assemble_vnc_ticket {
 545     my ($username, $path) = @_;
 546
 547     return $assemble_short_lived_ticket->('PVEVNC', $username, $path);
 548 }
 549
 550 sub verify_vnc_ticket {
 551     my ($ticket, $username, $path, $noerr) = @_;
 552
 553     return $verify_short_lived_ticket->($ticket, 'PVEVNC', $username, $path, $noerr);
 554 }
 555
 556 # Tunnel tickets
 557 # - they do not contain the username in plain text
 558 # - they are restricted to a specific resource path (example: '/vms/100', '/socket/run/qemu-server/123.storage')
 559 sub assemble_tunnel_ticket {
 560     my ($username, $path) = @_;
 561
 562     return $assemble_short_lived_ticket->('PVETUNNEL', $username, $path);
 563 }
 564
 565 sub verify_tunnel_ticket {
 566     my ($ticket, $username, $path, $noerr) = @_;
 567
 568     return $verify_short_lived_ticket->($ticket, 'PVETUNNEL', $username, $path, $noerr);
 569 }
 570
 571 sub assemble_spice_ticket {
 572     my ($username, $vmid, $node) = @_;
 573
 574     my $secret = &$get_csrfr_secret();
 575
 576     return PVE::Ticket::assemble_spice_ticket(
 577         $secret, $username, $vmid, $node);
 578 }
 579
 580 sub verify_spice_connect_url {
 581     my ($connect_str) = @_;
 582
 583     my $secret = &$get_csrfr_secret();
 584
 585     return PVE::Ticket::verify_spice_connect_url($secret, $connect_str);
 586 }
 587
 588 sub read_x509_subject_spice {
 589     my ($filename) = @_;
 590
 591     # read x509 subject
 592     my $bio = Net::SSLeay::BIO_new_file($filename, 'r');
 593     die "Could not open $filename using OpenSSL\n"
 594         if !$bio;
 595
 596     my $x509 = Net::SSLeay::PEM_read_bio_X509($bio);
 597     Net::SSLeay::BIO_free($bio);
 598
 599     die "Could not parse X509 certificate in $filename\n"
 600         if !$x509;
 601
 602     my $nameobj = Net::SSLeay::X509_get_subject_name($x509);
 603     my $subject = Net::SSLeay::X509_NAME_oneline($nameobj);
 604     Net::SSLeay::X509_free($x509);
 605
 606     # remote-viewer wants comma as separator (not '/')
 607     $subject =~ s!^/!!;
 608     $subject =~ s!/(\w+=)!,$1!g;
 609
 610     return $subject;
 611 }
 612
 613 # helper to generate SPICE remote-viewer configuration
 614 sub remote_viewer_config {
 615     my ($authuser, $vmid, $node, $proxy, $title, $port) = @_;
 616
 617     if (!$proxy) {
 618         my $host = `hostname -f` || PVE::INotify::nodename();
 619         chomp $host;
 620         $proxy = $host;
 621     }
 622
 623     my ($ticket, $proxyticket) = assemble_spice_ticket($authuser, $vmid, $node);
 624
 625     my $filename = "/etc/pve/local/pve-ssl.pem";
 626     my $subject = read_x509_subject_spice($filename);
 627
 628     my $cacert = PVE::Tools::file_get_contents("/etc/pve/pve-root-ca.pem", 8192);
 629     $cacert =~ s/\n/\\n/g;
 630
 631     $proxy = "[$proxy]" if Net::IP::ip_is_ipv6($proxy);
 632     my $config = {
 633         'secure-attention' => "Ctrl+Alt+Ins",
 634         'toggle-fullscreen' => "Shift+F11",
 635         'release-cursor' => "Ctrl+Alt+R",
 636         type => 'spice',
 637         title => $title,
 638         host => $proxyticket, # this breaks tls hostname verification, so we need to use 'host-subject'
 639         proxy => "http://$proxy:3128",
 640         'tls-port' => $port,
 641         'host-subject' => $subject,
 642         ca => $cacert,
 643         password => $ticket,
 644         'delete-this-file' => 1,
 645     };
 646
 647     return ($ticket, $proxyticket, $config);
 648 }
 649
 650 sub check_user_exist {
 651     my ($usercfg, $username, $noerr) = @_;
 652
 653     $username = PVE::Auth::Plugin::verify_username($username, $noerr);
 654     return undef if !$username;
 655
 656     return $usercfg->{users}->{$username} if $usercfg && $usercfg->{users}->{$username};
 657
 658     die "no such user ('$username')\n" if !$noerr;
 659
 660     return undef;
 661 }
 662
 663 sub check_user_enabled {
 664     my ($usercfg, $username, $noerr) = @_;
 665
 666     my $data = check_user_exist($usercfg, $username, $noerr);
 667     return undef if !$data;
 668
 669     if (!$data->{enable}) {
 670         die "user '$username' is disabled\n" if !$noerr;
 671         return undef;
 672     }
 673
 674     my $ctime = time();
 675     my $expire = $usercfg->{users}->{$username}->{expire};
 676
 677     if ($expire && $expire < $ctime) {
 678         die "user '$username' access expired\n" if !$noerr;
 679         return undef;
 680     }
 681
 682     return 1; # enabled and not expired
 683 }
 684
 685 sub check_token_exist {
 686     my ($usercfg, $username, $tokenid, $noerr) = @_;
 687
 688     my $user = check_user_exist($usercfg, $username, $noerr);
 689     return undef if !$user;
 690
 691     return $user->{tokens}->{$tokenid}
 692         if defined($user->{tokens}) && $user->{tokens}->{$tokenid};
 693
 694     die "no such token '$tokenid' for user '$username'\n" if !$noerr;
 695
 696     return undef;
 697 }
 698
 699 # deprecated
 700 sub verify_one_time_pw {
 701     my ($type, $username, $keys, $tfa_cfg, $otp) = @_;
 702
 703     die "missing one time password for two-factor authentication '$type'\n" if !$otp;
 704
 705     # fixme: proxy support?
 706     my $proxy;
 707
 708     if ($type eq 'yubico') {
 709         PVE::OTP::yubico_verify_otp($otp, $keys, $tfa_cfg->{url},
 710                                     $tfa_cfg->{id}, $tfa_cfg->{key}, $proxy);
 711     } elsif ($type eq 'oath') {
 712         PVE::OTP::oath_verify_otp($otp, $keys, $tfa_cfg->{step}, $tfa_cfg->{digits});
 713     } else {
 714         die "unknown tfa type '$type'\n";
 715     }
 716 }
 717
 718 # password should be utf8 encoded
 719 # Note: some plugins delay/sleep if auth fails
 720 sub authenticate_user : prototype($$$;$) {
 721     my ($username, $password, $otp, $tfa_challenge) = @_;
 722
 723     die "no username specified\n" if !$username;
 724
 725     my ($ruid, $realm);
 726
 727     ($username, $ruid, $realm) = PVE::Auth::Plugin::verify_username($username);
 728
 729     my $usercfg = cfs_read_file('user.cfg');
 730
 731     check_user_enabled($usercfg, $username);
 732
 733     my $domain_cfg = cfs_read_file('domains.cfg');
 734
 735     my $cfg = $domain_cfg->{ids}->{$realm};
 736     die "auth domain '$realm' does not exist\n" if !$cfg;
 737     my $plugin = PVE::Auth::Plugin->lookup($cfg->{type});
 738
 739     if ($tfa_challenge) {
 740         # This is the 2nd factor, use the password for the OTP response.
 741         my $tfa_challenge = authenticate_2nd_new($username, $realm, $password, $tfa_challenge);
 742         return wantarray ? ($username, $tfa_challenge) : $username;
 743     }
 744
 745     $plugin->authenticate_user($cfg, $realm, $ruid, $password);
 746
 747     # This is the first factor with an optional immediate 2nd factor for TOTP:
 748     $tfa_challenge = authenticate_2nd_new($username, $realm, $otp, undef);
 749     return wantarray ? ($username, $tfa_challenge) : $username;
 750 }
 751
 752 sub authenticate_2nd_new_do : prototype($$$$) {
 753     my ($username, $realm, $tfa_response, $tfa_challenge) = @_;
 754     my ($tfa_cfg, $realm_tfa) = user_get_tfa($username, $realm);
 755
 756     if (!defined($tfa_cfg)) {
 757         return undef;
 758     }
 759
 760     my $realm_type = $realm_tfa && $realm_tfa->{type};
 761     # verify realm type unless using recovery keys:
 762     if (defined($realm_type)) {
 763         $realm_type = 'totp' if $realm_type eq 'oath'; # we used to call it that
 764         if ($realm_type eq 'yubico') {
 765             # Yubico auth will not be supported in rust for now...
 766             if (!defined($tfa_challenge)) {
 767                 my $challenge = { yubico => JSON::true };
 768                 # Even with yubico auth we do allow recovery keys to be used:
 769                 if (my $recovery = $tfa_cfg->recovery_state($username)) {
 770                     $challenge->{recovery} = $recovery;
 771                 }
 772                 return to_json($challenge);
 773             }
 774
 775             if ($tfa_response =~ /^yubico:(.*)$/) {
 776                 $tfa_response = $1;
 777                 # Defer to after unlocking the TFA config:
 778                 return sub {
 779                     authenticate_yubico_new(
 780                         $tfa_cfg, $username, $realm_tfa, $tfa_challenge, $tfa_response,
 781                     );
 782                 };
 783             }
 784         }
 785
 786         my $response_type;
 787         if (defined($tfa_response)) {
 788             if ($tfa_response !~ /^([^:]+):/) {
 789                 die "bad otp response\n";
 790             }
 791             $response_type = $1;
 792         }
 793
 794         die "realm requires $realm_type authentication\n"
 795             if $response_type && $response_type ne 'recovery' && $response_type ne $realm_type;
 796     }
 797
 798     configure_u2f_and_wa($tfa_cfg);
 799
 800     my ($result, $tfa_done);
 801     if (defined($tfa_challenge)) {
 802         $tfa_done = 1;
 803         $tfa_challenge = verify_ticket($tfa_challenge, 0, $username);
 804         $result = $tfa_cfg->authentication_verify2($username, $tfa_challenge, $tfa_response);
 805         $tfa_challenge = undef;
 806     } else {
 807         $tfa_challenge = $tfa_cfg->authentication_challenge($username);
 808         if (defined($tfa_response)) {
 809             if (defined($tfa_challenge)) {
 810                 $tfa_done = 1;
 811                 $result = $tfa_cfg->authentication_verify2($username, $tfa_challenge, $tfa_response);
 812             } else {
 813                 die "no such challenge\n";
 814             }
 815         }
 816     }
 817
 818     if ($tfa_done) {
 819         if (!$result) {
 820             # authentication_verify2 somehow returned undef - should be unreachable
 821             die "2nd factor failed\n";
 822         }
 823
 824         if ($result->{'needs-saving'}) {
 825             cfs_write_file('priv/tfa.cfg', $tfa_cfg);
 826         }
 827         if ($result->{'totp-limit-reached'}) {
 828             # FIXME: send mail to the user (or admin/root if no email configured)
 829             die "failed 2nd factor: TOTP limit reached, locked\n";
 830         }
 831         if ($result->{'tfa-limit-reached'}) {
 832             # FIXME: send mail to the user (or admin/root if no email configured)
 833             die "failed 1nd factor: TFA limit reached, user locked out\n";
 834         }
 835         if (!$result->{result}) {
 836             die "failed 2nd factor\n";
 837         }
 838     }
 839
 840     return $tfa_challenge;
 841 }
 842
 843 # Returns a tfa challenge or undef.
 844 sub authenticate_2nd_new : prototype($$$$) {
 845     my ($username, $realm, $tfa_response, $tfa_challenge) = @_;
 846
 847     my $result;
 848
 849     if (defined($tfa_response) && $tfa_response =~ m/^recovery:/) {
 850         $result = lock_tfa_config(sub {
 851             authenticate_2nd_new_do($username, $realm, $tfa_response, $tfa_challenge);
 852         });
 853     } else {
 854         $result = authenticate_2nd_new_do($username, $realm, $tfa_response, $tfa_challenge);
 855     }
 856
 857     # Yubico auth returns the authentication sub:
 858     if (ref($result) eq 'CODE') {
 859         $result = $result->();
 860     }
 861
 862     return $result;
 863 }
 864
 865 sub authenticate_yubico_new : prototype($$$) {
 866     my ($tfa_cfg, $username, $realm, $tfa_challenge, $otp) = @_;
 867
 868     $tfa_challenge = verify_ticket($tfa_challenge, 0, $username);
 869     $tfa_challenge = from_json($tfa_challenge);
 870
 871     if (!$tfa_challenge->{yubico}) {
 872         die "no such challenge\n";
 873     }
 874
 875     my $keys = $tfa_cfg->get_yubico_keys($username);
 876     die "no keys configured\n" if !defined($keys) || !length($keys);
 877
 878     authenticate_yubico_do($otp, $keys, $realm);
 879
 880     # return `undef` to clear the tfa challenge.
 881     return undef;
 882 }
 883
 884 sub authenticate_yubico_do : prototype($$$) {
 885     my ($value, $keys, $realm) = @_;
 886
 887     # fixme: proxy support?
 888     my $proxy = undef;
 889
 890     PVE::OTP::yubico_verify_otp($value, $keys, $realm->{url}, $realm->{id}, $realm->{key}, $proxy);
 891 }
 892
 893 sub configure_u2f_and_wa : prototype($) {
 894     my ($tfa_cfg) = @_;
 895
 896     my $rpc_origin;
 897     my $get_origin = sub {
 898         return $rpc_origin if defined($rpc_origin);
 899         my $rpcenv = PVE::RPCEnvironment::get();
 900         if (my $origin = $rpcenv->get_request_host(1)) {
 901             $rpc_origin = "https://$origin";
 902             return $rpc_origin;
 903         }
 904         die "failed to figure out origin\n";
 905     };
 906
 907     my $dc = cfs_read_file('datacenter.cfg');
 908     if (my $u2f = $dc->{u2f}) {
 909         eval {
 910             $tfa_cfg->set_u2f_config({
 911                 origin => $u2f->{origin} // $get_origin->(),
 912                 appid => $u2f->{appid},
 913             });
 914         };
 915         warn "u2f unavailable, configuration error: $@\n" if $@;
 916     }
 917     if (my $wa = $dc->{webauthn}) {
 918         $wa->{origin} //= $get_origin->();
 919         eval { $tfa_cfg->set_webauthn_config({%$wa}) };
 920         warn "webauthn unavailable, configuration error: $@\n" if $@;
 921     }
 922 }
 923
 924 sub domain_set_password {
 925     my ($realm, $username, $password) = @_;
 926
 927     die "no auth domain specified" if !$realm;
 928
 929     my $domain_cfg = cfs_read_file('domains.cfg');
 930
 931     my $cfg = $domain_cfg->{ids}->{$realm};
 932     die "auth domain '$realm' does not exist\n" if !$cfg;
 933     my $plugin = PVE::Auth::Plugin->lookup($cfg->{type});
 934     $plugin->store_password($cfg, $realm, $username, $password);
 935 }
 936
 937 sub iterate_acl_tree {
 938     my ($path, $node, $code) = @_;
 939
 940     $code->($path, $node);
 941
 942     $path = '' if $path eq '/'; # avoid leading '//'
 943
 944     my $children = $node->{children};
 945
 946     foreach my $child (keys %$children) {
 947         iterate_acl_tree("$path/$child", $children->{$child}, $code);
 948     }
 949 }
 950
 951 # find ACL node corresponding to normalized $path under $root
 952 sub find_acl_tree_node {
 953     my ($root, $path) = @_;
 954
 955     my $split_path = [ split("/", $path) ];
 956
 957     if (!$split_path) {
 958         return $root;
 959     }
 960
 961     my $node = $root;
 962     for my $p (@$split_path) {
 963         next if !$p;
 964
 965         $node->{children} = {} if !$node->{children};
 966         $node->{children}->{$p} = {} if !$node->{children}->{$p};
 967
 968         $node = $node->{children}->{$p};
 969     }
 970
 971     return $node;
 972 }
 973
 974 sub add_user_group {
 975     my ($username, $usercfg, $group) = @_;
 976
 977     $usercfg->{users}->{$username}->{groups}->{$group} = 1;
 978     $usercfg->{groups}->{$group}->{users}->{$username} = 1;
 979 }
 980
 981 sub delete_user_group {
 982     my ($username, $usercfg) = @_;
 983
 984     foreach my $group (keys %{$usercfg->{groups}}) {
 985
 986         delete ($usercfg->{groups}->{$group}->{users}->{$username})
 987             if $usercfg->{groups}->{$group}->{users}->{$username};
 988     }
 989 }
 990
 991 sub delete_user_acl {
 992     my ($username, $usercfg) = @_;
 993
 994     my $code = sub {
 995         my ($path, $acl_node) = @_;
 996
 997         delete ($acl_node->{users}->{$username})
 998             if $acl_node->{users}->{$username};
 999     };
1000
1001     iterate_acl_tree("/", $usercfg->{acl_root}, $code);
1002 }
1003
1004 sub delete_group_acl {
1005     my ($group, $usercfg) = @_;
1006
1007     my $code = sub {
1008         my ($path, $acl_node) = @_;
1009
1010         delete ($acl_node->{groups}->{$group})
1011             if $acl_node->{groups}->{$group};
1012     };
1013
1014     iterate_acl_tree("/", $usercfg->{acl_root}, $code);
1015 }
1016
1017 sub delete_pool_acl {
1018     my ($pool, $usercfg) = @_;
1019
1020     delete ($usercfg->{acl_root}->{children}->{pool}->{children}->{$pool});
1021 }
1022
1023 # we automatically create some predefined roles by splitting privs
1024 # into 3 groups (per category)
1025 # root: only root is allowed to do that
1026 # admin: an administrator can to that
1027 # user: a normal user/customer can to that
1028 my $privgroups = {
1029     VM => {
1030         root => [],
1031         admin => [
1032             'VM.Config.Disk',
1033             'VM.Config.CPU',
1034             'VM.Config.Memory',
1035             'VM.Config.Network',
1036             'VM.Config.HWType',
1037             'VM.Config.Options', # covers all other things
1038             'VM.Allocate',
1039             'VM.Clone',
1040             'VM.Migrate',
1041             'VM.Monitor',
1042             'VM.Snapshot',
1043             'VM.Snapshot.Rollback',
1044         ],
1045         user => [
1046             'VM.Config.CDROM', # change CDROM media
1047             'VM.Config.Cloudinit',
1048             'VM.Console',
1049             'VM.Backup',
1050             'VM.PowerMgmt',
1051         ],
1052         audit => [
1053             'VM.Audit',
1054         ],
1055     },
1056     Sys => {
1057         root => [
1058             'Sys.PowerMgmt',
1059             'Sys.Modify', # edit/change node settings
1060             'Sys.Incoming', # incoming storage/guest migrations
1061         ],
1062         admin => [
1063             'Sys.Console',
1064             'Sys.Syslog',
1065         ],
1066         user => [],
1067         audit => [
1068             'Sys.Audit',
1069         ],
1070     },
1071     Datastore => {
1072         root => [],
1073         admin => [
1074             'Datastore.Allocate',
1075             'Datastore.AllocateTemplate',
1076         ],
1077         user => [
1078             'Datastore.AllocateSpace',
1079         ],
1080         audit => [
1081             'Datastore.Audit',
1082         ],
1083     },
1084     SDN => {
1085         root => [],
1086         admin => [
1087             'SDN.Allocate',
1088             'SDN.Audit',
1089         ],
1090         user => [
1091             'SDN.Use',
1092         ],
1093         audit => [
1094             'SDN.Audit',
1095         ],
1096     },
1097     User => {
1098         root => [
1099             'Realm.Allocate',
1100         ],
1101         admin => [
1102             'User.Modify',
1103             'Group.Allocate', # edit/change group settings
1104             'Realm.AllocateUser',
1105         ],
1106         user => [],
1107         audit => [],
1108     },
1109     Pool => {
1110         root => [],
1111         admin => [
1112             'Pool.Allocate', # create/delete pools
1113         ],
1114         user => [
1115             'Pool.Audit',
1116         ],
1117         audit => [
1118             'Pool.Audit',
1119         ],
1120     },
1121     Mapping => {
1122         root => [],
1123         admin => [
1124             'Mapping.Modify',
1125         ],
1126         user => [
1127             'Mapping.Use',
1128         ],
1129         audit => [
1130             'Mapping.Audit',
1131         ],
1132     },
1133 };
1134
1135 my $valid_privs = {
1136     'Permissions.Modify' => 1, # not contained in a group
1137 };
1138
1139 my $special_roles = {
1140     'NoAccess' => {}, # no privileges
1141     'Administrator' => $valid_privs, # all privileges
1142 };
1143
1144 sub create_roles {
1145
1146     foreach my $cat (keys %$privgroups) {
1147         my $cd = $privgroups->{$cat};
1148         foreach my $p (@{$cd->{root}}, @{$cd->{admin}},
1149                        @{$cd->{user}}, @{$cd->{audit}}) {
1150             $valid_privs->{$p} = 1;
1151         }
1152         foreach my $p (@{$cd->{admin}}, @{$cd->{user}}, @{$cd->{audit}}) {
1153
1154             $special_roles->{"PVE${cat}Admin"}->{$p} = 1;
1155             $special_roles->{"PVEAdmin"}->{$p} = 1;
1156         }
1157         if (scalar(@{$cd->{user}})) {
1158             foreach my $p (@{$cd->{user}}, @{$cd->{audit}}) {
1159                 $special_roles->{"PVE${cat}User"}->{$p} = 1;
1160             }
1161         }
1162         foreach my $p (@{$cd->{audit}}) {
1163             $special_roles->{"PVEAuditor"}->{$p} = 1;
1164         }
1165     }
1166
1167     # remove Mapping.Modify from PVEAdmin, only Administrator, root@pam and
1168     # PVEMappingAdmin should be able to use that for now
1169     delete $special_roles->{"PVEAdmin"}->{"Mapping.Modify"};
1170
1171     $special_roles->{"PVETemplateUser"} = { 'VM.Clone' => 1, 'VM.Audit' => 1 };
1172 };
1173
1174 create_roles();
1175
1176 sub create_priv_properties {
1177     my $properties = {};
1178     foreach my $priv (keys %$valid_privs) {
1179         $properties->{$priv} = {
1180             type => 'boolean',
1181             optional => 1,
1182         };
1183     }
1184     return $properties;
1185 }
1186
1187 sub role_is_special {
1188     my ($role) = @_;
1189     return (exists $special_roles->{$role}) ? 1 : 0;
1190 }
1191
1192 sub add_role_privs {
1193     my ($role, $usercfg, $privs) = @_;
1194
1195     return if !$privs;
1196
1197     die "role '$role' does not exist\n" if !$usercfg->{roles}->{$role};
1198
1199     foreach my $priv (split_list($privs)) {
1200         if (defined ($valid_privs->{$priv})) {
1201             $usercfg->{roles}->{$role}->{$priv} = 1;
1202         } else {
1203             die "invalid privilege '$priv'\n";
1204         }
1205     }
1206 }
1207
1208 sub lookup_username {
1209     my ($username, $noerr) = @_;
1210
1211     $username =~ m!^(${PVE::Auth::Plugin::user_regex})\@(${PVE::Auth::Plugin::realm_regex})$!;
1212
1213     my $realm = $2;
1214     my $domain_cfg = cfs_read_file("domains.cfg");
1215     my $casesensitive = $domain_cfg->{ids}->{$realm}->{'case-sensitive'} // 1;
1216     my $usercfg = cfs_read_file('user.cfg');
1217
1218     if (!$casesensitive) {
1219         my @matches = grep { lc $username eq lc $_ } (keys %{$usercfg->{users}});
1220
1221         die "ambiguous case insensitive match of username '$username', cannot safely grant access!\n"
1222             if scalar @matches > 1 && !$noerr;
1223
1224         return $matches[0]
1225     }
1226
1227     return $username;
1228 }
1229
1230 sub normalize_path {
1231     my $path = shift;
1232
1233     return undef if !$path;
1234
1235     $path =~ s|/+|/|g;
1236
1237     $path =~ s|/$||;
1238
1239     $path = '/' if !$path;
1240
1241     $path = "/$path" if $path !~ m|^/|;
1242
1243     return undef if $path !~ m|^[[:alnum:]\.\-\_\/]+$|;
1244
1245     return $path;
1246 }
1247
1248 sub check_path {
1249     my ($path) = @_;
1250     return $path =~ m!^(
1251         /
1252         |/access
1253         |/access/groups
1254         |/access/groups/[[:alnum:]\.\-\_]+
1255         |/access/realm
1256         |/access/realm/[[:alnum:]\.\-\_]+
1257         |/nodes
1258         |/nodes/[[:alnum:]\.\-\_]+
1259         |/pool
1260         |/pool/[[:alnum:]\.\-\_]+
1261         |/sdn
1262         |/sdn/zones
1263         |/sdn/zones/[[:alnum:]\.\-\_]+
1264         |/sdn/zones/[[:alnum:]\.\-\_]+/[[:alnum:]\.\-\_]+
1265         |/sdn/zones/[[:alnum:]\.\-\_]+/[[:alnum:]\.\-\_]+/[1-9][0-9]{0,3}
1266         |/storage
1267         |/storage/[[:alnum:]\.\-\_]+
1268         |/vms
1269         |/vms/[1-9][0-9]{2,}
1270         |/mapping
1271         |/mapping/[[:alnum:]\.\-\_]+
1272         |/mapping/[[:alnum:]\.\-\_]+/[[:alnum:]\.\-\_]+
1273     )$!xs;
1274 }
1275
1276 PVE::JSONSchema::register_format('pve-groupid', \&verify_groupname);
1277 sub verify_groupname {
1278     my ($groupname, $noerr) = @_;
1279
1280     if ($groupname !~ m/^[A-Za-z0-9\.\-_]+$/) {
1281
1282         die "group name '$groupname' contains invalid characters\n" if !$noerr;
1283
1284         return undef;
1285     }
1286
1287     return $groupname;
1288 }
1289
1290 PVE::JSONSchema::register_format('pve-roleid', \&verify_rolename);
1291 sub verify_rolename {
1292     my ($rolename, $noerr) = @_;
1293
1294     if ($rolename !~ m/^[A-Za-z0-9\.\-_]+$/) {
1295
1296         die "role name '$rolename' contains invalid characters\n" if !$noerr;
1297
1298         return undef;
1299     }
1300
1301     return $rolename;
1302 }
1303
1304 PVE::JSONSchema::register_format('pve-poolid', \&verify_poolname);
1305 sub verify_poolname {
1306     my ($poolname, $noerr) = @_;
1307
1308     if ($poolname !~ m/^[A-Za-z0-9\.\-_]+$/) {
1309
1310         die "pool name '$poolname' contains invalid characters\n" if !$noerr;
1311
1312         return undef;
1313     }
1314
1315     return $poolname;
1316 }
1317
1318 PVE::JSONSchema::register_format('pve-priv', \&verify_privname);
1319 sub verify_privname {
1320     my ($priv, $noerr) = @_;
1321
1322     if (!$valid_privs->{$priv}) {
1323         die "invalid privilege '$priv'\n" if !$noerr;
1324
1325         return undef;
1326     }
1327
1328     return $priv;
1329 }
1330
1331 sub userconfig_force_defaults {
1332     my ($cfg) = @_;
1333
1334     foreach my $r (keys %$special_roles) {
1335         $cfg->{roles}->{$r} = $special_roles->{$r};
1336     }
1337
1338     # add root user if not exists
1339     if (!$cfg->{users}->{'root@pam'}) {
1340         $cfg->{users}->{'root@pam'}->{enable} = 1;
1341     }
1342
1343     # add (empty) ACL tree root node
1344     if (!$cfg->{acl_root}) {
1345         $cfg->{acl_root} = {};
1346     }
1347 }
1348
1349 sub parse_user_config {
1350     my ($filename, $raw) = @_;
1351
1352     my $cfg = {};
1353
1354     userconfig_force_defaults($cfg);
1355
1356     $raw = '' if !defined($raw);
1357     while ($raw =~ /^\s*(.+?)\s*$/gm) {
1358         my $line = $1;
1359         my @data;
1360
1361         foreach my $d (split (/:/, $line)) {
1362             $d =~ s/^\s+//;
1363             $d =~ s/\s+$//;
1364             push @data, $d
1365         }
1366
1367         my $et = shift @data;
1368
1369         if ($et eq 'user') {
1370             my ($user, $enable, $expire, $firstname, $lastname, $email, $comment, $keys) = @data;
1371
1372             my (undef, undef, $realm) = PVE::Auth::Plugin::verify_username($user, 1);
1373             if (!$realm) {
1374                 warn "user config - ignore user '$user' - invalid user name\n";
1375                 next;
1376             }
1377
1378             $enable = $enable ? 1 : 0;
1379
1380             $expire = 0 if !$expire;
1381
1382             if ($expire !~ m/^\d+$/) {
1383                 warn "user config - ignore user '$user' - (illegal characters in expire '$expire')\n";
1384                 next;
1385             }
1386             $expire = int($expire);
1387
1388             #if (!verify_groupname ($group, 1)) {
1389             #    warn "user config - ignore user '$user' - invalid characters in group name\n";
1390             #    next;
1391             #}
1392
1393             $cfg->{users}->{$user} = {
1394                 enable => $enable,
1395                 # group => $group,
1396             };
1397             $cfg->{users}->{$user}->{firstname} = PVE::Tools::decode_text($firstname) if $firstname;
1398             $cfg->{users}->{$user}->{lastname} = PVE::Tools::decode_text($lastname) if $lastname;
1399             $cfg->{users}->{$user}->{email} = $email;
1400             $cfg->{users}->{$user}->{comment} = PVE::Tools::decode_text($comment) if $comment;
1401             $cfg->{users}->{$user}->{expire} = $expire;
1402             # keys: allowed yubico key ids or oath secrets (base32 encoded)
1403             $cfg->{users}->{$user}->{keys} = $keys if $keys;
1404
1405             #$cfg->{users}->{$user}->{groups}->{$group} = 1;
1406             #$cfg->{groups}->{$group}->{$user} = 1;
1407
1408         } elsif ($et eq 'group') {
1409             my ($group, $userlist, $comment) = @data;
1410
1411             if (!verify_groupname($group, 1)) {
1412                 warn "user config - ignore group '$group' - invalid characters in group name\n";
1413                 next;
1414             }
1415
1416             # make sure to add the group (even if there are no members)
1417             $cfg->{groups}->{$group} = { users => {} } if !$cfg->{groups}->{$group};
1418
1419             $cfg->{groups}->{$group}->{comment} = PVE::Tools::decode_text($comment) if $comment;
1420
1421             foreach my $user (split_list($userlist)) {
1422
1423                 if (!PVE::Auth::Plugin::verify_username($user, 1)) {
1424                     warn "user config - ignore invalid group member '$user'\n";
1425                     next;
1426                 }
1427
1428                 if ($cfg->{users}->{$user}) { # user exists
1429                     $cfg->{users}->{$user}->{groups}->{$group} = 1;
1430                 } else {
1431                     warn "user config - ignore invalid group member '$user'\n";
1432                 }
1433                 $cfg->{groups}->{$group}->{users}->{$user} = 1;
1434             }
1435
1436         } elsif ($et eq 'role') {
1437             my ($role, $privlist) = @data;
1438
1439             if (!verify_rolename($role, 1)) {
1440                 warn "user config - ignore role '$role' - invalid characters in role name\n";
1441                 next;
1442             }
1443
1444             # make sure to add the role (even if there are no privileges)
1445             $cfg->{roles}->{$role} = {} if !$cfg->{roles}->{$role};
1446
1447             foreach my $priv (split_list($privlist)) {
1448                 if (defined ($valid_privs->{$priv})) {
1449                     $cfg->{roles}->{$role}->{$priv} = 1;
1450                 } else {
1451                     warn "user config - ignore invalid privilege '$priv'\n";
1452                 }
1453             }
1454
1455         } elsif ($et eq 'acl') {
1456             my ($propagate, $pathtxt, $uglist, $rolelist) = @data;
1457
1458             $propagate = $propagate ? 1 : 0;
1459
1460             if (my $path = normalize_path($pathtxt)) {
1461                 my $acl_node;
1462                 foreach my $role (split_list($rolelist)) {
1463
1464                     if (!verify_rolename($role, 1)) {
1465                         warn "user config - ignore invalid role name '$role' in acl\n";
1466                         next;
1467                     }
1468
1469                     if (!$cfg->{roles}->{$role}) {
1470                         warn "user config - ignore invalid acl role '$role'\n";
1471                         next;
1472                     }
1473
1474                     foreach my $ug (split_list($uglist)) {
1475                         my ($group) = $ug =~ m/^@(\S+)$/;
1476
1477                         if ($group && verify_groupname($group, 1)) {
1478                             if (!$cfg->{groups}->{$group}) { # group does not exist
1479                                 warn "user config - ignore invalid acl group '$group'\n";
1480                             }
1481                             $acl_node = find_acl_tree_node($cfg->{acl_root}, $path) if !$acl_node;
1482                             $acl_node->{groups}->{$group}->{$role} = $propagate;
1483                         } elsif (PVE::Auth::Plugin::verify_username($ug, 1)) {
1484                             if (!$cfg->{users}->{$ug}) { # user does not exist
1485                                 warn "user config - ignore invalid acl member '$ug'\n";
1486                             }
1487                             $acl_node = find_acl_tree_node($cfg->{acl_root}, $path) if !$acl_node;
1488                             $acl_node->{users}->{$ug}->{$role} = $propagate;
1489                         } elsif (my ($user, $token) = split_tokenid($ug, 1)) {
1490                             if (check_token_exist($cfg, $user, $token, 1)) {
1491                                 $acl_node = find_acl_tree_node($cfg->{acl_root}, $path) if !$acl_node;
1492                                 $acl_node->{tokens}->{$ug}->{$role} = $propagate;
1493                             } else {
1494                                 warn "user config - ignore invalid acl token '$ug'\n";
1495                             }
1496                         } else {
1497                             warn "user config - invalid user/group '$ug' in acl\n";
1498                         }
1499                     }
1500                 }
1501             } else {
1502                 warn "user config - ignore invalid path in acl '$pathtxt'\n";
1503             }
1504         } elsif ($et eq 'pool') {
1505             my ($pool, $comment, $vmlist, $storelist) = @data;
1506
1507             if (!verify_poolname($pool, 1)) {
1508                 warn "user config - ignore pool '$pool' - invalid characters in pool name\n";
1509                 next;
1510             }
1511
1512             # make sure to add the pool (even if there are no members)
1513             $cfg->{pools}->{$pool} = { vms => {}, storage => {} } if !$cfg->{pools}->{$pool};
1514
1515             $cfg->{pools}->{$pool}->{comment} = PVE::Tools::decode_text($comment) if $comment;
1516
1517             foreach my $vmid (split_list($vmlist)) {
1518                 if ($vmid !~ m/^\d+$/) {
1519                     warn "user config - ignore invalid vmid '$vmid' in pool '$pool'\n";
1520                     next;
1521                 }
1522                 $vmid = int($vmid);
1523
1524                 if ($cfg->{vms}->{$vmid}) {
1525                     warn "user config - ignore duplicate vmid '$vmid' in pool '$pool'\n";
1526                     next;
1527                 }
1528
1529                 $cfg->{pools}->{$pool}->{vms}->{$vmid} = 1;
1530
1531                 # record vmid ==> pool relation
1532                 $cfg->{vms}->{$vmid} = $pool;
1533             }
1534
1535             foreach my $storeid (split_list($storelist)) {
1536                 if ($storeid !~ m/^[a-z][a-z0-9\-\_\.]*[a-z0-9]$/i) {
1537                     warn "user config - ignore invalid storage '$storeid' in pool '$pool'\n";
1538                     next;
1539                 }
1540                 $cfg->{pools}->{$pool}->{storage}->{$storeid} = 1;
1541             }
1542         } elsif ($et eq 'token') {
1543             my ($tokenid, $expire, $privsep, $comment) = @data;
1544
1545             my ($user, $token) = split_tokenid($tokenid, 1);
1546             if (!($user && $token)) {
1547                 warn "user config - ignore invalid tokenid '$tokenid'\n";
1548                 next;
1549             }
1550
1551             $privsep = $privsep ? 1 : 0;
1552
1553             $expire = 0 if !$expire;
1554
1555             if ($expire !~ m/^\d+$/) {
1556                 warn "user config - ignore token '$tokenid' - (illegal characters in expire '$expire')\n";
1557                 next;
1558             }
1559             $expire = int($expire);
1560
1561             if (my $user_cfg = $cfg->{users}->{$user}) { # user exists
1562                 $user_cfg->{tokens}->{$token} = {} if !$user_cfg->{tokens}->{$token};
1563                 my $token_cfg = $user_cfg->{tokens}->{$token};
1564                 $token_cfg->{privsep} = $privsep;
1565                 $token_cfg->{expire} = $expire;
1566                 $token_cfg->{comment} = PVE::Tools::decode_text($comment) if $comment;
1567             } else {
1568                 warn "user config - ignore token '$tokenid' - user does not exist\n";
1569             }
1570         } else {
1571             warn "user config - ignore config line: $line\n";
1572         }
1573     }
1574
1575     userconfig_force_defaults($cfg);
1576
1577     return $cfg;
1578 }
1579
1580 sub write_user_config {
1581     my ($filename, $cfg) = @_;
1582
1583     my $data = '';
1584
1585     foreach my $user (sort keys %{$cfg->{users}}) {
1586         my $d = $cfg->{users}->{$user};
1587         my $firstname = $d->{firstname} ? PVE::Tools::encode_text($d->{firstname}) : '';
1588         my $lastname = $d->{lastname} ? PVE::Tools::encode_text($d->{lastname}) : '';
1589         my $email = $d->{email} || '';
1590         my $comment = $d->{comment} ? PVE::Tools::encode_text($d->{comment}) : '';
1591         my $expire = int($d->{expire} || 0);
1592         my $enable = $d->{enable} ? 1 : 0;
1593         my $keys = $d->{keys} ? $d->{keys} : '';
1594         $data .= "user:$user:$enable:$expire:$firstname:$lastname:$email:$comment:$keys:\n";
1595
1596         my $user_tokens = $d->{tokens};
1597         foreach my $token (sort keys %$user_tokens) {
1598             my $td = $user_tokens->{$token};
1599             my $full_tokenid = join_tokenid($user, $token);
1600             my $comment = $td->{comment} ? PVE::Tools::encode_text($td->{comment}) : '';
1601             my $expire = int($td->{expire} || 0);
1602             my $privsep = $td->{privsep} ? 1 : 0;
1603             $data .= "token:$full_tokenid:$expire:$privsep:$comment:\n";
1604         }
1605     }
1606
1607     $data .= "\n";
1608
1609     foreach my $group (sort keys %{$cfg->{groups}}) {
1610         my $d = $cfg->{groups}->{$group};
1611         my $list = join (',', sort keys %{$d->{users}});
1612         my $comment = $d->{comment} ? PVE::Tools::encode_text($d->{comment}) : '';
1613         $data .= "group:$group:$list:$comment:\n";
1614     }
1615
1616     $data .= "\n";
1617
1618     foreach my $pool (sort keys %{$cfg->{pools}}) {
1619         my $d = $cfg->{pools}->{$pool};
1620         my $vmlist = join (',', sort keys %{$d->{vms}});
1621         my $storelist = join (',', sort keys %{$d->{storage}});
1622         my $comment = $d->{comment} ? PVE::Tools::encode_text($d->{comment}) : '';
1623         $data .= "pool:$pool:$comment:$vmlist:$storelist:\n";
1624     }
1625
1626     $data .= "\n";
1627
1628     foreach my $role (sort keys %{$cfg->{roles}}) {
1629         next if $special_roles->{$role};
1630
1631         my $d = $cfg->{roles}->{$role};
1632         my $list = join (',', sort keys %$d);
1633         $data .= "role:$role:$list:\n";
1634     }
1635
1636     $data .= "\n";
1637
1638     my $collect_rolelist_members = sub {
1639         my ($acl_members, $result, $prefix, $exclude) = @_;
1640
1641         foreach my $member (keys %$acl_members) {
1642             next if $exclude && $member eq $exclude;
1643
1644             my $l0 = '';
1645             my $l1 = '';
1646             foreach my $role (sort keys %{$acl_members->{$member}}) {
1647                 my $propagate = $acl_members->{$member}->{$role};
1648                 if ($propagate) {
1649                     $l1 .= ',' if $l1;
1650                     $l1 .= $role;
1651                 } else {
1652                     $l0 .= ',' if $l0;
1653                     $l0 .= $role;
1654                 }
1655             }
1656             $result->{0}->{$l0}->{"${prefix}${member}"} = 1 if $l0;
1657             $result->{1}->{$l1}->{"${prefix}${member}"} = 1 if $l1;
1658         }
1659     };
1660
1661     iterate_acl_tree("/", $cfg->{acl_root}, sub {
1662         my ($path, $d) = @_;
1663
1664         my $rolelist_members = {};
1665
1666         $collect_rolelist_members->($d->{'groups'}, $rolelist_members, '@');
1667
1668         # no need to save 'root@pam', it is always 'Administrator'
1669         $collect_rolelist_members->($d->{'users'}, $rolelist_members, '', 'root@pam');
1670
1671         $collect_rolelist_members->($d->{'tokens'}, $rolelist_members, '');
1672
1673         foreach my $propagate (0,1) {
1674             my $filtered = $rolelist_members->{$propagate};
1675             foreach my $rolelist (sort keys %$filtered) {
1676                 my $uglist = join (',', sort keys %{$filtered->{$rolelist}});
1677                 $data .= "acl:$propagate:$path:$uglist:$rolelist:\n";
1678             }
1679
1680         }
1681     });
1682
1683     return $data;
1684 }
1685
1686 # Creates a `PVE::RS::TFA` instance from the raw config data.
1687 # Its contained hash will also support the legacy functionality.
1688 sub parse_priv_tfa_config {
1689     my ($filename, $raw) = @_;
1690
1691     $raw = '' if !defined($raw);
1692     my $cfg = PVE::RS::TFA->new($raw);
1693
1694     # Purge invalid users:
1695     foreach my $user ($cfg->users()->@*) {
1696         my (undef, undef, $realm) = PVE::Auth::Plugin::verify_username($user, 1);
1697         if (!$realm) {
1698             warn "user tfa config - ignore user '$user' - invalid user name\n";
1699             $cfg->remove_user($user);
1700         }
1701     }
1702
1703     return $cfg;
1704 }
1705
1706 sub write_priv_tfa_config {
1707     my ($filename, $cfg) = @_;
1708
1709     return $cfg->write();
1710 }
1711
1712 sub roles {
1713     my ($cfg, $user, $path) = @_;
1714
1715     # NOTE: we do not consider pools here.
1716     # NOTE: for privsep tokens, this does not filter roles by those that the
1717     # corresponding user has.
1718     # Use $rpcenv->permission() for any actual permission checks!
1719
1720     return 'Administrator' if $user eq 'root@pam'; # root can do anything
1721
1722     if (!defined($path)) {
1723         # this shouldn't happen!
1724         warn "internal error: ACL check called for undefined ACL path!\n";
1725         return {};
1726     }
1727
1728     if (pve_verify_tokenid($user, 1)) {
1729         my $tokenid = $user;
1730         my ($username, $token) = split_tokenid($tokenid);
1731
1732         my $token_info = $cfg->{users}->{$username}->{tokens}->{$token};
1733         return () if !$token_info;
1734
1735         my $user_roles = roles($cfg, $username, $path);
1736
1737         # return full user privileges
1738         return $user_roles if !$token_info->{privsep};
1739     }
1740
1741     my $roles = {};
1742
1743     my $split = [ split("/", $path) ];
1744     if ($path eq '/') {
1745         $split = [ '' ];
1746     }
1747
1748     my $acl = $cfg->{acl_root};
1749     my $i = 0;
1750
1751     while (@$split) {
1752         my $p = shift @$split;
1753         my $final = !@$split;
1754         if ($p ne '') {
1755             $acl = $acl->{children}->{$p};
1756         }
1757
1758         #print "CHECKACL $path $p\n";
1759         #print "ACL $path = " . Dumper ($acl);
1760         if (my $ri = $acl->{tokens}->{$user}) {
1761             my $new;
1762             foreach my $role (keys %$ri) {
1763                 my $propagate = $ri->{$role};
1764                 if ($final || $propagate) {
1765                     #print "APPLY ROLE $p $user $role\n";
1766                     $new = {} if !$new;
1767                     $new->{$role} = $propagate;
1768                 }
1769             }
1770             if ($new) {
1771                 $roles = $new; # overwrite previous settings
1772                 next;
1773             }
1774         }
1775
1776         if (my $ri = $acl->{users}->{$user}) {
1777             my $new;
1778             foreach my $role (keys %$ri) {
1779                 my $propagate = $ri->{$role};
1780                 if ($final || $propagate) {
1781                     #print "APPLY ROLE $p $user $role\n";
1782                     $new = {} if !$new;
1783                     $new->{$role} = $propagate;
1784                 }
1785             }
1786             if ($new) {
1787                 $roles = $new; # overwrite previous settings
1788                 next; # user privs always override group privs
1789             }
1790         }
1791
1792         my $new;
1793         foreach my $g (keys %{$acl->{groups}}) {
1794             next if !$cfg->{groups}->{$g}->{users}->{$user};
1795             if (my $ri = $acl->{groups}->{$g}) {
1796                 foreach my $role (keys %$ri) {
1797                     my $propagate = $ri->{$role};
1798                     if ($final || $propagate) {
1799                         #print "APPLY ROLE $p \@$g $role\n";
1800                         $new = {} if !$new;
1801                         $new->{$role} = $propagate;
1802                     }
1803                 }
1804             }
1805         }
1806         if ($new) {
1807             $roles = $new; # overwrite previous settings
1808             next;
1809         }
1810     }
1811
1812     return { 'NoAccess' => $roles->{NoAccess} } if defined ($roles->{NoAccess});
1813     #return () if defined ($roles->{NoAccess});
1814
1815     #print "permission $user $path = " . Dumper ($roles);
1816
1817     #print "roles $user $path = " . join (',', @ra) . "\n";
1818
1819     return $roles;
1820 }
1821
1822 sub remove_vm_access {
1823     my ($vmid) = @_;
1824     my $delVMaccessFn = sub {
1825         my $usercfg = cfs_read_file("user.cfg");
1826         my $modified;
1827
1828         if (my $acl = $usercfg->{acl_root}->{children}->{vms}->{children}->{$vmid}) {
1829             delete $usercfg->{acl_root}->{children}->{vms}->{children}->{$vmid};
1830             $modified = 1;
1831         }
1832         if (my $pool = $usercfg->{vms}->{$vmid}) {
1833             if (my $data = $usercfg->{pools}->{$pool}) {
1834                 delete $data->{vms}->{$vmid};
1835                 delete $usercfg->{vms}->{$vmid};
1836                 $modified = 1;
1837             }
1838         }
1839         cfs_write_file("user.cfg", $usercfg) if $modified;
1840     };
1841
1842     lock_user_config($delVMaccessFn, "access permissions cleanup for VM $vmid failed");
1843 }
1844
1845 sub remove_storage_access {
1846     my ($storeid) = @_;
1847
1848     my $deleteStorageAccessFn = sub {
1849         my $usercfg = cfs_read_file("user.cfg");
1850         my $modified;
1851
1852         if (my $acl = $usercfg->{acl_root}->{children}->{storage}->{children}->{$storeid}) {
1853             delete $usercfg->{acl_root}->{children}->{storage}->{children}->{$storeid};
1854             $modified = 1;
1855         }
1856         foreach my $pool (keys %{$usercfg->{pools}}) {
1857             delete $usercfg->{pools}->{$pool}->{storage}->{$storeid};
1858             $modified = 1;
1859         }
1860         cfs_write_file("user.cfg", $usercfg) if $modified;
1861     };
1862
1863     lock_user_config($deleteStorageAccessFn,
1864                      "access permissions cleanup for storage $storeid failed");
1865 }
1866
1867 sub add_vm_to_pool {
1868     my ($vmid, $pool) = @_;
1869
1870     my $addVMtoPoolFn = sub {
1871         my $usercfg = cfs_read_file("user.cfg");
1872         if (my $data = $usercfg->{pools}->{$pool}) {
1873             $data->{vms}->{$vmid} = 1;
1874             $usercfg->{vms}->{$vmid} = $pool;
1875             cfs_write_file("user.cfg", $usercfg);
1876         }
1877     };
1878
1879     lock_user_config($addVMtoPoolFn, "can't add VM $vmid to pool '$pool'");
1880 }
1881
1882 sub remove_vm_from_pool {
1883     my ($vmid) = @_;
1884
1885     my $delVMfromPoolFn = sub {
1886         my $usercfg = cfs_read_file("user.cfg");
1887         if (my $pool = $usercfg->{vms}->{$vmid}) {
1888             if (my $data = $usercfg->{pools}->{$pool}) {
1889                 delete $data->{vms}->{$vmid};
1890                 delete $usercfg->{vms}->{$vmid};
1891                 cfs_write_file("user.cfg", $usercfg);
1892             }
1893         }
1894     };
1895
1896     lock_user_config($delVMfromPoolFn, "pool cleanup for VM $vmid failed");
1897 }
1898
1899 my $USER_CONTROLLED_TFA_TYPES = {
1900     u2f => 1,
1901     oath => 1,
1902 };
1903
1904 sub user_remove_tfa : prototype($) {
1905     my ($userid) = @_;
1906
1907     my $tfa_cfg = cfs_read_file('priv/tfa.cfg');
1908     $tfa_cfg->remove_user($userid);
1909     cfs_write_file('priv/tfa.cfg', $tfa_cfg);
1910 }
1911
1912 my sub add_old_yubico_keys : prototype($$$) {
1913     my ($userid, $tfa_cfg, $keys) = @_;
1914
1915     my $count = 0;
1916     foreach my $key (split_list($keys)) {
1917         my $description = "<old userconfig key $count>";
1918         ++$count;
1919         $tfa_cfg->add_yubico_entry($userid, $description, $key);
1920     }
1921 }
1922
1923 my sub normalize_totp_secret : prototype($) {
1924     my ($key) = @_;
1925
1926     my $binkey;
1927     # See PVE::OTP::oath_verify_otp:
1928     if ($key =~ /^v2-0x([0-9a-fA-F]+)$/) {
1929         # v2, hex
1930         $binkey = pack('H*', $1);
1931     } elsif ($key =~ /^v2-([A-Z2-7=]+)$/) {
1932         # v2, base32
1933         $binkey = MIME::Base32::decode_rfc3548($1);
1934     } elsif ($key =~ /^[A-Z2-7=]{16}$/) {
1935         $binkey = MIME::Base32::decode_rfc3548($key);
1936     } elsif ($key =~ /^[A-Fa-f0-9]{40}$/) {
1937         $binkey = pack('H*', $key);
1938     } else {
1939         return undef;
1940     }
1941
1942     return MIME::Base32::encode_rfc3548($binkey);
1943 }
1944
1945 my sub add_old_totp_keys : prototype($$$$) {
1946     my ($userid, $tfa_cfg, $realm_tfa, $keys) = @_;
1947
1948     my $issuer = 'Proxmox%20VE';
1949     my $account = uri_escape("Old key for $userid");
1950     my $digits = $realm_tfa->{digits} || 6;
1951     my $step = $realm_tfa->{step} || 30;
1952     my $uri = "otpauth://totp/$issuer:$account?digits=$digits&period=$step&algorithm=SHA1&secret=";
1953
1954     my $count = 0;
1955     foreach my $key (split_list($keys)) {
1956         $key = normalize_totp_secret($key);
1957         # and just skip invalid keys:
1958         next if !defined($key);
1959
1960         my $description = "<old userconfig key $count>";
1961         ++$count;
1962         eval { $tfa_cfg->add_totp_entry($userid, $description, $uri . $key) };
1963         warn $@ if $@;
1964     }
1965 }
1966
1967 sub add_old_keys_to_realm_tfa : prototype($$$$) {
1968     my ($userid, $tfa_cfg, $realm_tfa, $keys) = @_;
1969
1970     # if there's no realm tfa configured, we don't know what the keys mean, so we just ignore
1971     # them...
1972     return if !$realm_tfa;
1973
1974     my $type = $realm_tfa->{type};
1975     if ($type eq 'oath') {
1976         add_old_totp_keys($userid, $tfa_cfg, $realm_tfa, $keys);
1977     } elsif ($type eq 'yubico') {
1978         add_old_yubico_keys($userid, $tfa_cfg, $keys);
1979     } else {
1980         # invalid keys, we'll just drop them now...
1981     }
1982 }
1983
1984 sub user_get_tfa : prototype($$$) {
1985     my ($username, $realm) = @_;
1986
1987     my $user_cfg = cfs_read_file('user.cfg');
1988     my $user = $user_cfg->{users}->{$username}
1989         or die "user '$username' not found\n";
1990
1991     my $keys = $user->{keys};
1992
1993     my $domain_cfg = cfs_read_file('domains.cfg');
1994     my $realm_cfg = $domain_cfg->{ids}->{$realm};
1995     die "auth domain '$realm' does not exist\n" if !$realm_cfg;
1996
1997     my $realm_tfa = $realm_cfg->{tfa};
1998     $realm_tfa = PVE::Auth::Plugin::parse_tfa_config($realm_tfa)
1999         if $realm_tfa;
2000
2001     if (!$keys) {
2002         return if !$realm_tfa;
2003         die "missing required 2nd keys\n";
2004     }
2005
2006     my $tfa_cfg = cfs_read_file('priv/tfa.cfg');
2007     if (defined($keys) && $keys !~ /^x(?:!.*)$/) {
2008         add_old_keys_to_realm_tfa($username, $tfa_cfg, $realm_tfa, $keys);
2009     }
2010     return ($tfa_cfg, $realm_tfa);
2011 }
2012
2013 # bash completion helpers
2014
2015 register_standard_option('userid-completed',
2016     get_standard_option('userid', { completion => \&complete_username}),
2017 );
2018
2019 sub complete_username {
2020
2021     my $user_cfg = cfs_read_file('user.cfg');
2022
2023     return [ keys %{$user_cfg->{users}} ];
2024 }
2025
2026 sub complete_group {
2027
2028     my $user_cfg = cfs_read_file('user.cfg');
2029
2030     return [ keys %{$user_cfg->{groups}} ];
2031 }
2032
2033 sub complete_realm {
2034
2035     my $domain_cfg = cfs_read_file('domains.cfg');
2036
2037     return [ keys %{$domain_cfg->{ids}} ];
2038 }
2039
2040 1;