PVE/AccessControl.pm

   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 && $ticket =~ m/^(PVE:\S+)::([^:\s]+)$/) {
 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 # VNC tickets
 179 # - they do not contain the username in plain text
 180 # - they are restricted to a specific resource path (example: '/vms/100')
 181 sub assemble_vnc_ticket {
 182     my ($username, $path) = @_;
 183
 184     my $rsa_priv = get_privkey();
 185
 186     my $timestamp = sprintf("%08X", time());
 187
 188     my $plain = "PVEVNC:$timestamp";
 189
 190     $path = normalize_path($path);
 191
 192     my $full = "$plain:$username:$path";
 193
 194     my $ticket = $plain . "::" . encode_base64($rsa_priv->sign($full), '');
 195
 196     return $ticket;
 197 }
 198
 199 sub verify_vnc_ticket {
 200     my ($ticket, $username, $path, $noerr) = @_;
 201
 202     if ($ticket && $ticket =~ m/^(PVEVNC:\S+)::([^:\s]+)$/) {
 203         my $plain = $1;
 204         my $sig = $2;
 205         my $full = "$plain:$username:$path";
 206
 207         my $rsa_pub = get_pubkey();
 208         # Note: sign only match if $username and  $path is correct
 209         if ($rsa_pub->verify($full, decode_base64($sig))) {
 210             if ($plain =~ m/^PVEVNC:([A-Z0-9]{8})$/) {
 211                 my $ttime = hex($1);
 212
 213                 my $age = time() - $ttime;
 214
 215                 if (($age > -20) && ($age < 40)) {
 216                     return 1;
 217                 }
 218             }
 219         }
 220     }
 221
 222     die "permission denied - invalid vnc ticket\n" if !$noerr;
 223
 224     return undef;
 225 }
 226
 227
 228 sub authenticate_user_shadow {
 229     my ($userid, $password) = @_;
 230
 231     die "no password\n" if !$password;
 232
 233     my $shadow_cfg = cfs_read_file($shadowconfigfile);
 234
 235     if ($shadow_cfg->{users}->{$userid}) {
 236         my $encpw = crypt($password, $shadow_cfg->{users}->{$userid}->{shadow});
 237         die "invalid credentials\n" if ($encpw ne $shadow_cfg->{users}->{$userid}->{shadow});
 238     } else {
 239         die "no password set\n";
 240     }
 241 }
 242
 243 sub authenticate_user_pam {
 244     my ($userid, $password) = @_;
 245
 246     # user (www-data) need to be able to read /etc/passwd /etc/shadow
 247
 248     die "no password\n" if !$password;
 249
 250     my $pamh = new Authen::PAM ('common-auth', $userid, sub {
 251         my @res;
 252         while(@_) {
 253             my $msg_type = shift;
 254             my $msg = shift;
 255             push @res, (0, $password);
 256         }
 257         push @res, 0;
 258         return @res;
 259     });
 260
 261     if (!ref ($pamh)) {
 262         my $err = $pamh->pam_strerror($pamh);
 263         die "error during PAM init: $err";
 264     }
 265
 266     my $res;
 267
 268     if (($res = $pamh->pam_authenticate(0)) != PAM_SUCCESS) {
 269         my $err = $pamh->pam_strerror($res);
 270         die "$err\n";
 271     }
 272
 273     if (($res = $pamh->pam_acct_mgmt (0)) != PAM_SUCCESS) {
 274         my $err = $pamh->pam_strerror($res);
 275         die "$err\n";
 276     }
 277
 278     $pamh = 0; # call destructor
 279 }
 280
 281 sub authenticate_user_ad {
 282
 283     my ($entry, $server, $userid, $password) = @_;
 284
 285     my $default_port = $entry->{secure} ? 636: 389;
 286     my $port = $entry->{port} ? $entry->{port} : $default_port;
 287     my $scheme = $entry->{secure} ? 'ldaps' : 'ldap';
 288     my $conn_string = "$scheme://${server}:$port";
 289
 290     my $ldap = Net::LDAP->new($server) || die "$@\n";
 291
 292     $userid = "$userid\@$entry->{domain}"
 293         if $userid !~ m/@/ && $entry->{domain};
 294
 295     my $res = $ldap->bind($userid, password => $password);
 296
 297     my $code = $res->code();
 298     my $err = $res->error;
 299
 300     $ldap->unbind();
 301
 302     die "$err\n" if ($code);
 303 }
 304
 305 sub authenticate_user_ldap {
 306
 307     my ($entry, $server, $userid, $password) = @_;
 308
 309     my $default_port = $entry->{secure} ? 636: 389;
 310     my $port = $entry->{port} ? $entry->{port} : $default_port;
 311     my $scheme = $entry->{secure} ? 'ldaps' : 'ldap';
 312     my $conn_string = "$scheme://${server}:$port";
 313
 314     my $ldap = Net::LDAP->new($conn_string, verify => 'none') || die "$@\n";
 315     my $search = $entry->{user_attr} . "=" . $userid;
 316     my $result = $ldap->search( base    => "$entry->{base_dn}",
 317                                 scope   => "sub",
 318                                 filter  => "$search",
 319                                 attrs   => ['dn']
 320                                 );
 321     die "no entries returned\n" if !$result->entries;
 322     my @entries = $result->entries;
 323     my $res = $ldap->bind($entries[0]->dn, password => $password);
 324
 325     my $code = $res->code();
 326     my $err = $res->error;
 327
 328     $ldap->unbind();
 329
 330     die "$err\n" if ($code);
 331 }
 332
 333 sub authenticate_user_domain {
 334     my ($realm, $userid, $password) = @_;
 335
 336     my $domain_cfg = cfs_read_file($domainconfigfile);
 337
 338     die "no auth domain specified" if !$realm;
 339
 340     if ($realm eq 'pam') {
 341         authenticate_user_pam($userid, $password);
 342         return;
 343     }
 344
 345     eval {
 346         if ($realm eq 'pve') {
 347             authenticate_user_shadow($userid, $password);
 348         } else {
 349
 350             my $cfg = $domain_cfg->{$realm};
 351             die "auth domain '$realm' does not exists\n" if !$cfg;
 352
 353             if ($cfg->{type} eq 'ad') {
 354                 eval { authenticate_user_ad($cfg, $cfg->{server1}, $userid, $password); };
 355                 my $err = $@;
 356                 return if !$err;
 357                 die $err if !$cfg->{server2};
 358                 authenticate_user_ad($cfg, $cfg->{server2}, $userid, $password);
 359             } elsif ($cfg->{type} eq 'ldap') {
 360                 eval { authenticate_user_ldap($cfg, $cfg->{server1}, $userid, $password); };
 361                 my $err = $@;
 362                 return if !$err;
 363                 die $err if !$cfg->{server2};
 364                 authenticate_user_ldap($cfg, $cfg->{server2}, $userid, $password);
 365             } else {
 366                 die "unknown auth type '$cfg->{type}'\n";
 367             }
 368         }
 369     };
 370     if (my $err = $@) {
 371         sleep(2); # timeout after failed auth
 372         die $err;
 373     }
 374 }
 375
 376 sub check_user_enabled {
 377     my ($usercfg, $username, $noerr) = @_;
 378
 379     $username = verify_username($username, $noerr);
 380     return undef if !$username;
 381
 382     return 1 if $usercfg && $usercfg->{users}->{$username} &&
 383         $usercfg->{users}->{$username}->{enable};
 384
 385     return 1 if $username eq 'root@pam'; # root is always enabled
 386
 387     die "no such user ('$username')\n" if !$noerr;
 388
 389     return undef;
 390 }
 391
 392 # password should be utf8 encoded
 393 sub authenticate_user {
 394     my ($username, $password) = @_;
 395
 396     die "no username specified\n" if !$username;
 397
 398     my ($userid, $realm);
 399
 400     ($username, $userid, $realm) = verify_username($username);
 401
 402     my $usercfg = cfs_read_file('user.cfg');
 403
 404     eval { check_user_enabled($usercfg, $username); };
 405     if (my $err = $@) {
 406         sleep(2);
 407         die $err;
 408     }
 409
 410     my $ctime = time();
 411     my $expire = $usercfg->{users}->{$username}->{expire};
 412
 413     if ($expire && ($expire < $ctime)) {
 414         sleep(2);
 415         die "account expired\n"
 416     }
 417
 418     authenticate_user_domain($realm, $userid, $password);
 419
 420     return $username;
 421 }
 422
 423 sub delete_shadow_password {
 424     my ($userid) = @_;
 425
 426     lock_shadow_config(sub {
 427         my $shadow_cfg = cfs_read_file($shadowconfigfile);
 428         delete ($shadow_cfg->{users}->{$userid})
 429             if $shadow_cfg->{users}->{$userid};
 430         cfs_write_file($shadowconfigfile, $shadow_cfg);
 431     });
 432 }
 433
 434 sub store_shadow_password {
 435     my ($userid, $password) = @_;
 436
 437     lock_shadow_config(sub {
 438         my $shadow_cfg = cfs_read_file($shadowconfigfile);
 439         $shadow_cfg->{users}->{$userid}->{shadow} = encrypt_pw($password);
 440         cfs_write_file($shadowconfigfile, $shadow_cfg);
 441     });
 442 }
 443
 444 sub encrypt_pw {
 445     my ($pw) = @_;
 446
 447     my $time = substr (Digest::SHA::sha1_base64 (time), 0, 8);
 448     return crypt (encode("utf8", $pw), "\$5\$$time\$");
 449 }
 450
 451 sub store_pam_password {
 452     my ($userid, $password) = @_;
 453
 454     my $cmd = ['/usr/sbin/usermod'];
 455
 456     my $epw = encrypt_pw($password);
 457     push @$cmd, '-p', $epw;
 458
 459     push @$cmd, $userid;
 460
 461     run_command($cmd);
 462 }
 463
 464 sub domain_set_password {
 465     my ($realm, $userid, $password) = @_;
 466
 467     die "no auth domain specified" if !$realm;
 468
 469     if ($realm eq 'pam') {
 470         store_pam_password($userid, $password);
 471     } elsif ($realm eq 'pve') {
 472         store_shadow_password($userid, $password);
 473     } else {
 474         die "can't set password on auth domain '$realm'\n";
 475     }
 476 }
 477
 478 sub add_user_group {
 479
 480     my ($username, $usercfg, $group) = @_;
 481     $usercfg->{users}->{$username}->{groups}->{$group} = 1;
 482     $usercfg->{groups}->{$group}->{users}->{$username} = 1;
 483 }
 484
 485 sub delete_user_group {
 486
 487     my ($username, $usercfg) = @_;
 488
 489     foreach my $group (keys %{$usercfg->{groups}}) {
 490
 491         delete ($usercfg->{groups}->{$group}->{users}->{$username})
 492             if $usercfg->{groups}->{$group}->{users}->{$username};
 493     }
 494 }
 495
 496 sub delete_user_acl {
 497
 498     my ($username, $usercfg) = @_;
 499
 500     foreach my $acl (keys %{$usercfg->{acl}}) {
 501
 502         delete ($usercfg->{acl}->{$acl}->{users}->{$username})
 503             if $usercfg->{acl}->{$acl}->{users}->{$username};
 504     }
 505
 506 }
 507 sub delete_group_acl {
 508
 509     my ($group, $usercfg) = @_;
 510
 511     foreach my $acl (keys %{$usercfg->{acl}}) {
 512
 513         delete ($usercfg->{acl}->{$acl}->{groups}->{$group})
 514             if $usercfg->{acl}->{$acl}->{groups}->{$group};
 515     }
 516
 517 }
 518
 519 # we automatically create some predefined roles by splitting privs
 520 # into 3 groups (per category)
 521 # root: only root is allowed to do that
 522 # admin: an administrator can to that
 523 # user: a normak user/customer can to that
 524 my $privgroups = {
 525     VM => {
 526         root => [],
 527         admin => [
 528             'VM.Modify',
 529             'VM.Allocate',
 530             'VM.Migrate',
 531             'Permissions.Modify',
 532         ],
 533         user => [
 534             'VM.Console',
 535             'VM.PowerMgmt',
 536         ],
 537         audit => [
 538             'VM.Audit'
 539         ],
 540     },
 541     Sys => {
 542         root => [
 543             'Sys.PowerMgmt',
 544             'Sys.Modify', # edit/change node settings
 545         ],
 546         admin => [
 547             'Sys.Console',
 548             'Sys.Syslog',
 549         ],
 550         user => [],
 551         audit => [
 552             'Sys.Audit',
 553         ],
 554     },
 555     Datastore => {
 556         root => [
 557             'Datastore.Allocate',
 558             'Permissions.Modify',
 559         ],
 560         admin => [],
 561         user => [
 562             'Datastore.AllocateSpace',
 563         ],
 564         audit => [
 565             'Datastore.Audit',
 566         ],
 567     },
 568 };
 569
 570 my $valid_privs = {};
 571
 572 my $special_roles = {
 573     'NoAccess' => {}, # no priviledges
 574     'Administrator' => $valid_privs, # all priviledges
 575 };
 576
 577 sub create_roles {
 578
 579     foreach my $cat (keys %$privgroups) {
 580         my $cd = $privgroups->{$cat};
 581         foreach my $p (@{$cd->{root}}, @{$cd->{admin}},
 582                        @{$cd->{user}}, @{$cd->{audit}}) {
 583             $valid_privs->{$p} = 1;
 584         }
 585         foreach my $p (@{$cd->{admin}}, @{$cd->{user}}, @{$cd->{audit}}) {
 586
 587             $special_roles->{"PVE${cat}Admin"}->{$p} = 1;
 588             $special_roles->{"PVEAdmin"}->{$p} = 1;
 589         }
 590         if (scalar(@{$cd->{user}})) {
 591             foreach my $p (@{$cd->{user}}, @{$cd->{audit}}) {
 592                 $special_roles->{"PVE${cat}User"}->{$p} = 1;
 593             }
 594         }
 595         foreach my $p (@{$cd->{audit}}) {
 596             $special_roles->{"PVEAuditor"}->{$p} = 1;
 597         }
 598     }
 599 };
 600
 601 create_roles();
 602
 603 my $valid_attributes = {
 604     ad => {
 605         server1 => '[\w\d]+(.[\w\d]+)*',
 606         server2 => '[\w\d]+(.[\w\d]+)*',
 607         domain => '\S+',
 608         port => '\d+',
 609         secure => '',
 610         comment => '.*',
 611     },
 612     ldap => {
 613         server1 => '[\w\d]+(.[\w\d]+)*',
 614         server2 => '[\w\d]+(.[\w\d]+)*',
 615         base_dn => '\w+=[\w\s]+(,\s*\w+=[\w\s]+)*',
 616         user_attr => '\S{2,}',
 617         secure => '',
 618         port => '\d+',
 619         comment => '.*',
 620     }
 621 };
 622
 623 sub add_role_privs {
 624     my ($role, $usercfg, $privs) = @_;
 625
 626     return if !$privs;
 627
 628     die "role '$role' does not exist\n" if !$usercfg->{roles}->{$role};
 629
 630     foreach my $priv (split_list($privs)) {
 631         if (defined ($valid_privs->{$priv})) {
 632             $usercfg->{roles}->{$role}->{$priv} = 1;
 633         } else {
 634             die "invalid priviledge '$priv'\n";
 635         }
 636     }
 637 }
 638
 639 sub normalize_path {
 640     my $path = shift;
 641
 642     $path =~ s|/+|/|;
 643
 644     $path =~ s|/$||;
 645
 646     $path = '/' if !$path;
 647
 648     return undef if $path !~ m|^[[:alnum:]\-\_\/]+$|;
 649
 650     return $path;
 651 }
 652
 653 my $realm_regex = qr/[A-Za-z][A-Za-z0-9\.\-_]+/;
 654
 655 sub pve_verify_realm {
 656     my ($realm, $noerr) = @_;
 657
 658     if ($realm !~ m/^${realm_regex}$/) {
 659         return undef if $noerr;
 660         die "value does not look like a valid realm\n";
 661     }
 662     return $realm;
 663 }
 664
 665 PVE::JSONSchema::register_format('pve-userid', \&verify_username);
 666 sub verify_username {
 667     my ($username, $noerr) = @_;
 668
 669     $username = '' if !$username;
 670     my $len = length($username);
 671     if ($len < 3) {
 672         die "user name '$username' is too short\n" if !$noerr;
 673         return undef;
 674     }
 675     if ($len > 64) {
 676         die "user name '$username' is too long ($len > 64)\n" if !$noerr;
 677         return undef;
 678     }
 679
 680     # we only allow a limited set of characters (colon is not allowed,
 681     # because we store usernames in colon separated lists)!
 682     if ($username =~ m/^([^\s:]+)\@(${realm_regex})$/) {
 683         return wantarray ? ($username, $1, $2) : $username;
 684     }
 685
 686     die "value '$username' does not look like a valid user name\n" if !$noerr;
 687
 688     return undef;
 689 }
 690 PVE::JSONSchema::register_standard_option('userid', {
 691     description => "User ID",
 692     type => 'string', format => 'pve-userid',
 693     maxLength => 64,
 694 });
 695
 696 PVE::JSONSchema::register_standard_option('realm', {
 697     description => "Authentication domain ID",
 698     type => 'string', format => 'pve-configid',
 699     maxLength => 32,
 700 });
 701
 702 PVE::JSONSchema::register_format('pve-groupid', \&verify_groupname);
 703 sub verify_groupname {
 704     my ($groupname, $noerr) = @_;
 705
 706     if ($groupname !~ m/^[A-Za-z0-9\.\-_]+$/) {
 707
 708         die "group name '$groupname' contains invalid characters\n" if !$noerr;
 709
 710         return undef;
 711     }
 712
 713     return $groupname;
 714 }
 715
 716 PVE::JSONSchema::register_format('pve-roleid', \&verify_rolename);
 717 sub verify_rolename {
 718     my ($rolename, $noerr) = @_;
 719
 720     if ($rolename !~ m/^[A-Za-z0-9\.\-_]+$/) {
 721
 722         die "role name '$rolename' contains invalid characters\n" if !$noerr;
 723
 724         return undef;
 725     }
 726
 727     return $rolename;
 728 }
 729
 730 PVE::JSONSchema::register_format('pve-priv', \&verify_privname);
 731 sub verify_privname {
 732     my ($priv, $noerr) = @_;
 733
 734     if (!$valid_privs->{$priv}) {
 735         die "invalid priviledge '$priv'\n" if !$noerr;
 736
 737         return undef;
 738     }
 739
 740     return $priv;
 741 }
 742
 743 sub userconfig_force_defaults {
 744     my ($cfg) = @_;
 745
 746     foreach my $r (keys %$special_roles) {
 747         $cfg->{roles}->{$r} = $special_roles->{$r};
 748     }
 749
 750     # fixme: remove 'root' group (not required)?
 751
 752     # add root user
 753     $cfg->{users}->{'root@pam'}->{enable} = 1;
 754 }
 755
 756 sub parse_user_config {
 757     my ($filename, $raw) = @_;
 758
 759     my $cfg = {};
 760
 761     userconfig_force_defaults($cfg);
 762
 763     while ($raw && $raw =~ s/^(.*?)(\n|$)//) {
 764         my $line = $1;
 765
 766         next if $line =~ m/^\s*$/; # skip empty lines
 767
 768         my @data;
 769
 770         foreach my $d (split (/:/, $line)) {
 771             $d =~ s/^\s+//;
 772             $d =~ s/\s+$//;
 773             push @data, $d
 774         }
 775
 776         my $et = shift @data;
 777
 778         if ($et eq 'user') {
 779             my ($user, $enable, $expire, $firstname, $lastname, $email, $comment) = @data;
 780
 781             my (undef, undef, $realm) = verify_username($user, 1);
 782             if (!$realm) {
 783                 warn "user config - ignore user '$user' - invalid user name\n";
 784                 next;
 785             }
 786
 787             $enable = $enable ? 1 : 0;
 788
 789             $expire = 0 if !$expire;
 790
 791             if ($expire !~ m/^\d+$/) {
 792                 warn "user config - ignore user '$user' - (illegal characters in expire '$expire')\n";
 793                 next;
 794             }
 795             $expire = int($expire);
 796
 797             #if (!verify_groupname ($group, 1)) {
 798             #    warn "user config - ignore user '$user' - invalid characters in group name\n";
 799             #    next;
 800             #}
 801
 802             $cfg->{users}->{$user} = {
 803                 enable => $enable,
 804                 # group => $group,
 805             };
 806             $cfg->{users}->{$user}->{firstname} = PVE::Tools::decode_text($firstname) if $firstname;
 807             $cfg->{users}->{$user}->{lastname} = PVE::Tools::decode_text($lastname) if $lastname;
 808             $cfg->{users}->{$user}->{email} = $email;
 809             $cfg->{users}->{$user}->{comment} = PVE::Tools::decode_text($comment) if $comment;
 810             $cfg->{users}->{$user}->{expire} = $expire;
 811
 812             #$cfg->{users}->{$user}->{groups}->{$group} = 1;
 813             #$cfg->{groups}->{$group}->{$user} = 1;
 814
 815         } elsif ($et eq 'group') {
 816             my ($group, $userlist, $comment) = @data;
 817
 818             if (!verify_groupname($group, 1)) {
 819                 warn "user config - ignore group '$group' - invalid characters in group name\n";
 820                 next;
 821             }
 822
 823             # make sure to add the group (even if there are no members)
 824             $cfg->{groups}->{$group} = { users => {} } if !$cfg->{groups}->{$group};
 825
 826             $cfg->{groups}->{$group}->{comment} = PVE::Tools::decode_text($comment) if $comment;
 827
 828             foreach my $user (split_list($userlist)) {
 829
 830                 if (!verify_username($user, 1)) {
 831                     warn "user config - ignore invalid group member '$user'\n";
 832                     next;
 833                 }
 834
 835                 if ($cfg->{users}->{$user}) { # user exists
 836                     $cfg->{users}->{$user}->{groups}->{$group} = 1;
 837                     $cfg->{groups}->{$group}->{users}->{$user} = 1;
 838                 } else {
 839                     warn "user config - ignore invalid group member '$user'\n";
 840                 }
 841             }
 842
 843         } elsif ($et eq 'role') {
 844             my ($role, $privlist) = @data;
 845
 846             if (!verify_rolename($role, 1)) {
 847                 warn "user config - ignore role '$role' - invalid characters in role name\n";
 848                 next;
 849             }
 850
 851             # make sure to add the role (even if there are no privileges)
 852             $cfg->{roles}->{$role} = {} if !$cfg->{roles}->{$role};
 853
 854             foreach my $priv (split_list($privlist)) {
 855                 if (defined ($valid_privs->{$priv})) {
 856                     $cfg->{roles}->{$role}->{$priv} = 1;
 857                 } else {
 858                     warn "user config - ignore invalid priviledge '$priv'\n";
 859                 }
 860             }
 861
 862         } elsif ($et eq 'acl') {
 863             my ($propagate, $pathtxt, $uglist, $rolelist) = @data;
 864
 865             if (my $path = normalize_path($pathtxt)) {
 866                 foreach my $role (split_list($rolelist)) {
 867
 868                     if (!verify_rolename($role, 1)) {
 869                         warn "user config - ignore invalid role name '$role' in acl\n";
 870                         next;
 871                     }
 872
 873                     foreach my $ug (split_list($uglist)) {
 874                         if ($ug =~ m/^@(\w+)$/) {
 875                             my $group = $1;
 876                             if ($cfg->{groups}->{$group}) { # group exists
 877                                 $cfg->{acl}->{$path}->{groups}->{$group}->{$role} = $propagate;
 878                             } else {
 879                                 warn "user config - ignore invalid acl group '$group'\n";
 880                             }
 881                         } elsif (verify_username($ug, 1)) {
 882                             if ($cfg->{users}->{$ug}) { # user exists
 883                                 $cfg->{acl}->{$path}->{users}->{$ug}->{$role} = $propagate;
 884                             } else {
 885                                 warn "user config - ignore invalid acl member '$ug'\n";
 886                             }
 887                         } else {
 888                             warn "user config - invalid user/group '$ug' in acl\n";
 889                         }
 890                     }
 891                 }
 892             } else {
 893                 warn "user config - ignore invalid path in acl '$pathtxt'\n";
 894             }
 895         } else {
 896             warn "user config - ignore config line: $line\n";
 897         }
 898     }
 899
 900     userconfig_force_defaults($cfg);
 901
 902     return $cfg;
 903 }
 904
 905 sub parse_shadow_passwd {
 906     my ($filename, $raw) = @_;
 907
 908     my $shadow = {};
 909
 910     while ($raw && $raw =~ s/^(.*?)(\n|$)//) {
 911         my $line = $1;
 912
 913         next if $line =~ m/^\s*$/; # skip empty lines
 914
 915         if ($line !~ m/^\S+:\S+:$/) {
 916             warn "pve shadow password: ignore invalid line $.\n";
 917             next;
 918         }
 919
 920         my ($userid, $crypt_pass) = split (/:/, $line);
 921         $shadow->{users}->{$userid}->{shadow} = $crypt_pass;
 922     }
 923
 924     return $shadow;
 925 }
 926
 927 sub write_domains {
 928     my ($filename, $cfg) = @_;
 929
 930     my $data = '';
 931
 932     my $wrote_default;
 933
 934     foreach my $realm (sort keys %$cfg) {
 935         my $entry = $cfg->{$realm};
 936         my $type = lc($entry->{type});
 937
 938         next if !$type;
 939
 940         next if ($type eq 'pam') || ($type eq 'pve');
 941
 942         my $formats = $valid_attributes->{$type};
 943         next if !$formats;
 944
 945         $data .= "$type: $realm\n";
 946
 947         foreach my $k (sort keys %$entry) {
 948             next if $k eq 'type';
 949             my $v = $entry->{$k};
 950             if ($k eq 'default') {
 951                     $data .= "\t$k\n" if $v && !$wrote_default;
 952                     $wrote_default = 1;
 953             } elsif (defined($formats->{$k})) {
 954                 if (!$formats->{$k}) {
 955                     $data .= "\t$k\n" if $v;
 956                 } elsif ($v =~ m/^$formats->{$k}$/) {
 957                     $v = PVE::Tools::encode_text($v) if $k eq 'comment';
 958                     $data .= "\t$k $v\n";
 959                 } else {
 960                     die "invalid value '$v' for attribute '$k'\n";
 961                 }
 962             } else {
 963                 die "invalid attribute '$k' - not supported\n";
 964             }
 965         }
 966
 967         $data .= "\n";
 968     }
 969
 970     return $data;
 971 }
 972
 973 sub parse_domains {
 974     my ($filename, $raw) = @_;
 975
 976     my $cfg = {};
 977
 978     my $default;
 979
 980     while ($raw && $raw =~ s/^(.*?)(\n|$)//) {
 981         my $line = $1;
 982
 983         next if $line =~ m/^\#/; # skip comment lines
 984         next if $line =~ m/^\s*$/; # skip empty lines
 985
 986         if ($line =~ m/^(\S+):\s*(\S+)\s*$/) {
 987             my $realm = $2;
 988             my $type = lc($1);
 989
 990             my $ignore = 0;
 991             my $entry;
 992
 993             my $formats = $valid_attributes->{$type};
 994             if (!$formats) {
 995                 $ignore = 1;
 996                 warn "ignoring domain '$realm' - (unsupported authentication type '$type')\n";
 997             } elsif (!pve_verify_realm($realm, 1)) {
 998                 $ignore = 1;
 999                 warn "ignoring domain '$realm' - (illegal characters)\n";
1000             } else {
1001                 $entry = { type => $type };
1002             }
1003
1004             while ($raw && $raw =~ s/^(.*?)(\n|$)//) {
1005                 $line = $1;
1006
1007                 next if $line =~ m/^\#/; #skip comment lines
1008                 last if $line =~ m/^\s*$/;
1009
1010                 next if $ignore; # skip
1011
1012                 if ($line =~ m/^\s+(default)\s*$/) {
1013                     $default = $realm if !$default;
1014                 } elsif ($line =~ m/^\s+(\S+)(\s+(.*\S))?\s*$/) {
1015                     my ($k, $v) = (lc($1), $3);
1016                     if (defined($formats->{$k})) {
1017                         if (!$formats->{$k} && !defined($v)) {
1018                                 $entry->{$k} = 1;
1019                         } elsif ($formats->{$k} && $v =~ m/^$formats->{$k}$/) {
1020                             if (!defined($entry->{$k})) {
1021                                 $v = PVE::Tools::decode_text($v) if $k eq 'comment';
1022                                 $entry->{$k} = $v;
1023                             } else {
1024                                 warn "ignoring duplicate attribute '$k $v'\n";
1025                             }
1026                         } else {
1027                             warn "ignoring value '$v' for attribute '$k' - invalid format\n";
1028                         }
1029                     } else {
1030                         warn "ignoring attribute '$k' - not supported\n";
1031                     }
1032                 } else {
1033                     warn "ignore config line: $line\n";
1034                 }
1035             }
1036
1037             if ($entry->{server2} && !$entry->{server1}) {
1038                 $entry->{server1} = $entry->{server2};
1039                 delete $entry->{server2};
1040             }
1041
1042             if ($ignore) {
1043                 # do nothing
1044             } elsif (!$entry->{server1}) {
1045                 warn "ignoring domain '$realm' - missing server attribute\n";
1046             } elsif (($entry->{type} eq "ldap") && !$entry->{user_attr}) {
1047                 warn "ignoring domain '$realm' - missing user attribute\n";
1048             } elsif (($entry->{type} eq "ldap") && !$entry->{base_dn}) {
1049                 warn "ignoring domain '$realm' - missing base_dn attribute\n";
1050             } elsif (($entry->{type} eq "ad") && !$entry->{domain}) {
1051                 warn "ignoring domain '$realm' - missing domain attribute\n";
1052             } else {
1053                 $cfg->{$realm} = $entry;
1054             }
1055
1056         } else {
1057             warn "ignore config line: $line\n";
1058         }
1059     }
1060
1061     $cfg->{$default}->{default} = 1 if $default;
1062
1063     # add default domains
1064
1065     $cfg->{pve} = {
1066         type => 'builtin',
1067         comment => "Proxmox VE authentication server",
1068     };
1069
1070     $cfg->{pam} = {
1071         type => 'builtin',
1072         comment => "Linux PAM standard authentication",
1073     };
1074
1075     return $cfg;
1076 }
1077
1078 sub write_shadow_config {
1079     my ($filename, $cfg) = @_;
1080
1081     my $data = '';
1082     foreach my $userid (keys %{$cfg->{users}}) {
1083         my $crypt_pass = $cfg->{users}->{$userid}->{shadow};
1084         $data .= "$userid:$crypt_pass:\n";
1085     }
1086
1087     return $data
1088 }
1089
1090 sub write_user_config {
1091     my ($filename, $cfg) = @_;
1092
1093     my $data = '';
1094
1095     foreach my $user (keys %{$cfg->{users}}) {
1096         my $d = $cfg->{users}->{$user};
1097         my $firstname = $d->{firstname} ? PVE::Tools::encode_text($d->{firstname}) : '';
1098         my $lastname = $d->{lastname} ? PVE::Tools::encode_text($d->{lastname}) : '';
1099         my $email = $d->{email} || '';
1100         my $comment = $d->{comment} ? PVE::Tools::encode_text($d->{comment}) : '';
1101         my $expire = int($d->{expire} || 0);
1102         my $enable = $d->{enable} ? 1 : 0;
1103         $data .= "user:$user:$enable:$expire:$firstname:$lastname:$email:$comment:\n";
1104     }
1105
1106     $data .= "\n";
1107
1108     foreach my $group (keys %{$cfg->{groups}}) {
1109         my $d = $cfg->{groups}->{$group};
1110         my $list = join (',', keys %{$d->{users}});
1111         my $comment = $d->{comment} ? PVE::Tools::encode_text($d->{comment}) : '';
1112         $data .= "group:$group:$list:$comment:\n";
1113     }
1114
1115     $data .= "\n";
1116
1117     foreach my $role (keys %{$cfg->{roles}}) {
1118         next if $special_roles->{$role};
1119
1120         my $d = $cfg->{roles}->{$role};
1121         my $list = join (',', keys %$d);
1122         $data .= "role:$role:$list:\n";
1123     }
1124
1125     $data .= "\n";
1126
1127     foreach my $path (sort keys %{$cfg->{acl}}) {
1128         my $d = $cfg->{acl}->{$path};
1129
1130         my $ra = {};
1131
1132         foreach my $group (keys %{$d->{groups}}) {
1133             my $l0 = '';
1134             my $l1 = '';
1135             foreach my $role (sort keys %{$d->{groups}->{$group}}) {
1136                 my $propagate = $d->{groups}->{$group}->{$role};
1137                 if ($propagate) {
1138                     $l1 .= ',' if $l1;
1139                     $l1 .= $role;
1140                 } else {
1141                     $l0 .= ',' if $l0;
1142                     $l0 .= $role;
1143                 }
1144             }
1145             $ra->{0}->{$l0}->{"\@$group"} = 1 if $l0;
1146             $ra->{1}->{$l1}->{"\@$group"} = 1 if $l1;
1147         }
1148
1149         foreach my $user (keys %{$d->{users}}) {
1150             # no need to save, because root is always 'Administartor'
1151             next if $user eq 'root@pam';
1152
1153             my $l0 = '';
1154             my $l1 = '';
1155             foreach my $role (sort keys %{$d->{users}->{$user}}) {
1156                 my $propagate = $d->{users}->{$user}->{$role};
1157                 if ($propagate) {
1158                     $l1 .= ',' if $l1;
1159                     $l1 .= $role;
1160                 } else {
1161                     $l0 .= ',' if $l0;
1162                     $l0 .= $role;
1163                 }
1164             }
1165             $ra->{0}->{$l0}->{$user} = 1 if $l0;
1166             $ra->{1}->{$l1}->{$user} = 1 if $l1;
1167         }
1168
1169         foreach my $rolelist (sort keys %{$ra->{0}}) {
1170             my $uglist = join (',', keys %{$ra->{0}->{$rolelist}});
1171             $data .= "acl:0:$path:$uglist:$rolelist:\n";
1172         }
1173         foreach my $rolelist (sort keys %{$ra->{1}}) {
1174             my $uglist = join (',', keys %{$ra->{1}->{$rolelist}});
1175             $data .= "acl:1:$path:$uglist:$rolelist:\n";
1176         }
1177     }
1178
1179     return $data;
1180 }
1181
1182 sub roles {
1183     my ($cfg, $user, $path) = @_;
1184
1185     return 'Administrator' if $user eq 'root@pam'; # root can do anything
1186
1187     my $perm = {};
1188
1189     foreach my $p (sort keys %{$cfg->{acl}}) {
1190         my $final = ($path eq $p);
1191
1192         next if !(($p eq '/') || $final || ($path =~ m|^$p/|));
1193
1194         my $acl = $cfg->{acl}->{$p};
1195
1196         #print "CHECKACL $path $p\n";
1197         #print "ACL $path = " . Dumper ($acl);
1198
1199         if (my $ri = $acl->{users}->{$user}) {
1200             my $new;
1201             foreach my $role (keys %$ri) {
1202                 my $propagate = $ri->{$role};
1203                 if ($final || $propagate) {
1204                     #print "APPLY ROLE $p $user $role\n";
1205                     $new = {} if !$new;
1206                     $new->{$role} = 1;
1207                 }
1208             }
1209             if ($new) {
1210                 $perm = $new; # overwrite previous settings
1211                 next; # user privs always override group privs
1212             }
1213         }
1214
1215         my $new;
1216         foreach my $g (keys %{$acl->{groups}}) {
1217             next if !$cfg->{groups}->{$g}->{users}->{$user};
1218             if (my $ri = $acl->{groups}->{$g}) {
1219                 foreach my $role (keys %$ri) {
1220                     my $propagate = $ri->{$role};
1221                     if ($final || $propagate) {
1222                         #print "APPLY ROLE $p \@$g $role\n";
1223                         $new = {} if !$new;
1224                         $new->{$role} = 1;
1225                     }
1226                 }
1227             }
1228         }
1229         if ($new) {
1230             $perm = $new; # overwrite previous settings
1231             next;
1232         }
1233
1234         #die "what herea?";
1235     }
1236
1237     my $res = {};
1238     if (!defined ($perm->{NoAccess})) {
1239         $res = $perm;
1240     }
1241
1242     #print "permission $user $path = " . Dumper ($perm);
1243
1244     my @ra = keys %$res;
1245
1246     #print "roles $user $path = " . join (',', @ra) . "\n";
1247
1248     return @ra;
1249 }
1250
1251 sub permission {
1252     my ($cfg, $user, $path) = @_;
1253
1254     $user = verify_username($user, 1);
1255     return {} if !$user;
1256
1257     my @ra = roles($cfg, $user, $path);
1258
1259     my $privs = {};
1260
1261     foreach my $role (@ra) {
1262         if (my $privset = $cfg->{roles}->{$role}) {
1263             foreach my $p (keys %$privset) {
1264                 $privs->{$p} = 1;
1265             }
1266         }
1267     }
1268
1269     #print "priviledges $user $path = " . Dumper ($privs);
1270
1271     return $privs;
1272 }
1273
1274 sub check_permissions {
1275     my ($username, $path, $privlist) = @_;
1276
1277     $path = normalize_path($path);
1278     my $usercfg = cfs_read_file('user.cfg');
1279     my $perm = permission($usercfg, $username, $path);
1280
1281     foreach my $priv (split_list($privlist)) {
1282         return undef if !$perm->{$priv};
1283     };
1284
1285     return 1;
1286 }
1287
1288 1;