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 MIME::Base64;
  10 use Digest::SHA;
  11 use Digest::HMAC_SHA1;
  12 use URI::Escape;
  13 use LWP::UserAgent;
  14 use PVE::Tools qw(run_command lock_file file_get_contents split_list safe_print);
  15 use PVE::Cluster qw(cfs_register_file cfs_read_file cfs_write_file cfs_lock_file);
  16 use PVE::JSONSchema;
  17
  18 use PVE::Auth::Plugin;
  19 use PVE::Auth::AD;
  20 use PVE::Auth::LDAP;
  21 use PVE::Auth::PVE;
  22 use PVE::Auth::PAM;
  23
  24 use Data::Dumper; # fixme: remove
  25
  26 # load and initialize all plugins
  27
  28 PVE::Auth::AD->register();
  29 PVE::Auth::LDAP->register();
  30 PVE::Auth::PVE->register();
  31 PVE::Auth::PAM->register();
  32 PVE::Auth::Plugin->init();
  33
  34 # $authdir must be writable by root only!
  35 my $confdir = "/etc/pve";
  36 my $authdir = "$confdir/priv";
  37 my $authprivkeyfn = "$authdir/authkey.key";
  38 my $authpubkeyfn = "$confdir/authkey.pub";
  39 my $pve_www_key_fn = "$confdir/pve-www.key";
  40
  41 my $ticket_lifetime = 3600*2; # 2 hours
  42
  43 Crypt::OpenSSL::RSA->import_random_seed();
  44
  45 cfs_register_file('user.cfg',
  46                   \&parse_user_config,
  47                   \&write_user_config);
  48
  49
  50 sub verify_username {
  51     PVE::Auth::Plugin::verify_username(@_);
  52 }
  53
  54 sub pve_verify_realm {
  55     PVE::Auth::Plugin::pve_verify_realm(@_);
  56 }
  57
  58 sub lock_user_config {
  59     my ($code, $errmsg) = @_;
  60
  61     cfs_lock_file("user.cfg", undef, $code);
  62     if (my $err = $@) {
  63         $errmsg ? die "$errmsg: $err" : die $err;
  64     }
  65 }
  66
  67 my $pve_auth_pub_key;
  68 sub get_pubkey {
  69
  70     return $pve_auth_pub_key if $pve_auth_pub_key;
  71
  72     my $input = PVE::Tools::file_get_contents($authpubkeyfn);
  73
  74     $pve_auth_pub_key = Crypt::OpenSSL::RSA->new_public_key($input);
  75
  76     return $pve_auth_pub_key;
  77 }
  78
  79 my $csrf_prevention_secret;
  80 my $get_csrfr_secret = sub {
  81     if (!$csrf_prevention_secret) {
  82         my $input = PVE::Tools::file_get_contents($pve_www_key_fn);
  83         $csrf_prevention_secret = Digest::SHA::sha1_base64($input);
  84     }
  85     return $csrf_prevention_secret;
  86 };
  87
  88 sub assemble_csrf_prevention_token {
  89     my ($username) = @_;
  90
  91     my $timestamp = sprintf("%08X", time());
  92
  93     my $digest = Digest::SHA::sha1_base64("$timestamp:$username", &$get_csrfr_secret());
  94
  95     return "$timestamp:$digest";
  96 }
  97
  98 sub verify_csrf_prevention_token {
  99     my ($username, $token, $noerr) = @_;
 100
 101     if ($token =~ m/^([A-Z0-9]{8}):(\S+)$/) {
 102         my $sig = $2;
 103         my $timestamp = $1;
 104         my $ttime = hex($timestamp);
 105
 106         my $digest = Digest::SHA::sha1_base64("$timestamp:$username", &$get_csrfr_secret());
 107
 108         my $age = time() - $ttime;
 109         return if ($digest eq $sig) && ($age > -300) && ($age < $ticket_lifetime);
 110     }
 111
 112     die "Permission denied - invalid csrf token\n" if !$noerr;
 113
 114     return undef;
 115 }
 116
 117 my $pve_auth_priv_key;
 118 sub get_privkey {
 119
 120     return $pve_auth_priv_key if $pve_auth_priv_key;
 121
 122     my $input = PVE::Tools::file_get_contents($authprivkeyfn);
 123
 124     $pve_auth_priv_key = Crypt::OpenSSL::RSA->new_private_key($input);
 125
 126     return $pve_auth_priv_key;
 127 }
 128
 129 sub assemble_ticket {
 130     my ($username) = @_;
 131
 132     my $rsa_priv = get_privkey();
 133
 134     my $timestamp = sprintf("%08X", time());
 135
 136     my $plain = "PVE:$username:$timestamp";
 137
 138     my $ticket = $plain . "::" . encode_base64($rsa_priv->sign($plain), '');
 139
 140     return $ticket;
 141 }
 142
 143 sub verify_ticket {
 144     my ($ticket, $noerr) = @_;
 145
 146     if ($ticket && $ticket =~ m/^(PVE:\S+)::([^:\s]+)$/) {
 147         my $plain = $1;
 148         my $sig = $2;
 149
 150         my $rsa_pub = get_pubkey();
 151         if ($rsa_pub->verify($plain, decode_base64($sig))) {
 152             if ($plain =~ m/^PVE:(\S+):([A-Z0-9]{8})$/) {
 153                 my $username = $1;
 154                 my $timestamp = $2;
 155                 my $ttime = hex($timestamp);
 156
 157                 my $age = time() - $ttime;
 158
 159                 if (PVE::Auth::Plugin::verify_username($username, 1) &&
 160                     ($age > -300) && ($age < $ticket_lifetime)) {
 161                     return wantarray ? ($username, $age) : $username;
 162                 }
 163             }
 164         }
 165     }
 166
 167     die "permission denied - invalid ticket\n" if !$noerr;
 168
 169     return undef;
 170 }
 171
 172 # VNC tickets
 173 # - they do not contain the username in plain text
 174 # - they are restricted to a specific resource path (example: '/vms/100')
 175 sub assemble_vnc_ticket {
 176     my ($username, $path) = @_;
 177
 178     my $rsa_priv = get_privkey();
 179
 180     my $timestamp = sprintf("%08X", time());
 181
 182     my $plain = "PVEVNC:$timestamp";
 183
 184     $path = normalize_path($path);
 185
 186     my $full = "$plain:$username:$path";
 187
 188     my $ticket = $plain . "::" . encode_base64($rsa_priv->sign($full), '');
 189
 190     return $ticket;
 191 }
 192
 193 sub verify_vnc_ticket {
 194     my ($ticket, $username, $path, $noerr) = @_;
 195
 196     if ($ticket && $ticket =~ m/^(PVEVNC:\S+)::([^:\s]+)$/) {
 197         my $plain = $1;
 198         my $sig = $2;
 199         my $full = "$plain:$username:$path";
 200
 201         my $rsa_pub = get_pubkey();
 202         # Note: sign only match if $username and  $path is correct
 203         if ($rsa_pub->verify($full, decode_base64($sig))) {
 204             if ($plain =~ m/^PVEVNC:([A-Z0-9]{8})$/) {
 205                 my $ttime = hex($1);
 206
 207                 my $age = time() - $ttime;
 208
 209                 if (($age > -20) && ($age < 40)) {
 210                     return 1;
 211                 }
 212             }
 213         }
 214     }
 215
 216     die "permission denied - invalid vnc ticket\n" if !$noerr;
 217
 218     return undef;
 219 }
 220
 221 sub assemble_spice_ticket {
 222     my ($username, $vmid, $node) = @_;
 223
 224     my $rsa_priv = get_privkey();
 225
 226     my $timestamp = sprintf("%08x", time());
 227
 228     my $randomstr = "PVESPICE:$timestamp:$vmid:$node:" . rand(10);
 229
 230     # this should be uses as one-time password
 231     # max length is 60 chars (spice limit)
 232     # we pass this to qemu set_pasword and limit lifetime there
 233     # keep this secret
 234     my $ticket = Digest::SHA::sha1_hex($rsa_priv->sign($randomstr));
 235
 236     # Note: spice proxy connects with HTTP, so $proxyticket is exposed to public
 237     # we use a signature/timestamp to make sure nobody can fake such ticket
 238     # an attacker can use this $proxyticket, but he will fail because $ticket is
 239     # private.
 240     # The proxy need to be able to extract/verify the ticket
 241     # Note: data needs to be lower case only, because virt-viewer needs that
 242     # Note: RSA signature are too long (>=256 charaters) and makes problems with remote-viewer
 243
 244     my $secret = &$get_csrfr_secret();
 245     my $plain = "pvespiceproxy:$timestamp:$vmid:" . lc($node);
 246
 247     # produces 40 characters
 248     my $sig = unpack("H*", Digest::SHA::sha1($plain, &$get_csrfr_secret()));
 249
 250     #my $sig =  unpack("H*", $rsa_priv->sign($plain)); # this produce too long strings (512)
 251
 252     my $proxyticket = $plain . "::" . $sig;
 253
 254     return ($ticket, $proxyticket);
 255 }
 256
 257 sub verify_spice_connect_url {
 258     my ($connect_str) = @_;
 259
 260     # Note: we pass the spice ticket as 'host', so the
 261     # spice viewer connects with "$ticket:$port"
 262
 263     return undef if !$connect_str;
 264
 265     if ($connect_str =~m/^pvespiceproxy:([a-z0-9]{8}):(\d+):(\S+)::([a-z0-9]{40}):(\d+)$/) {
 266         my ($timestamp, $vmid, $node, $hexsig, $port) = ($1, $2, $3, $4, $5, $6);
 267         my $ttime = hex($timestamp);
 268         my $age = time() - $ttime;
 269
 270         # use very limited lifetime - is this enough?
 271         return undef if !(($age > -20) && ($age < 40));
 272
 273         my $plain = "pvespiceproxy:$timestamp:$vmid:$node";
 274         my $sig = unpack("H*", Digest::SHA::sha1($plain, &$get_csrfr_secret()));
 275
 276         if ($sig eq $hexsig) {
 277             return ($vmid, $node, $port);
 278         }
 279     }
 280
 281     return undef;
 282 }
 283
 284 sub read_x509_subject_spice {
 285     my ($filename) = @_;
 286
 287     # read x509 subject
 288     my $bio = Net::SSLeay::BIO_new_file($filename, 'r');
 289     my $x509 = Net::SSLeay::PEM_read_bio_X509($bio);
 290     Net::SSLeay::BIO_free($bio);
 291     my $nameobj = Net::SSLeay::X509_get_subject_name($x509);
 292     my $subject = Net::SSLeay::X509_NAME_oneline($nameobj);
 293     Net::SSLeay::X509_free($x509);
 294
 295     # remote-viewer wants comma as seperator (not '/')
 296     $subject =~ s!^/!!;
 297     $subject =~ s!/(\w+=)!,$1!g;
 298
 299     return $subject;
 300 }
 301
 302 # helper to generate SPICE remote-viewer configuration
 303 sub remote_viewer_config {
 304     my ($authuser, $vmid, $node, $proxy, $title, $port) = @_;
 305
 306     if (!$proxy) {
 307         my $host = `hostname -f` || PVE::INotify::nodename();
 308         chomp $host;
 309         $proxy = $host;
 310     }
 311
 312     my ($ticket, $proxyticket) = assemble_spice_ticket($authuser, $vmid, $node);
 313
 314     my $filename = "/etc/pve/local/pve-ssl.pem";
 315     my $subject = read_x509_subject_spice($filename);
 316
 317     my $cacert = PVE::Tools::file_get_contents("/etc/pve/pve-root-ca.pem", 8192);
 318     $cacert =~ s/\n/\\n/g;
 319
 320     my $config = {
 321         'secure-attention' => "Ctrl+Alt+Ins",
 322         'toggle-fullscreen' => "Shift+F11",
 323         'release-cursor' => "Ctrl+Alt+R",
 324         type => 'spice',
 325         title => $title,
 326         host => $proxyticket, # this break tls hostname verification, so we need to use 'host-subject'
 327         proxy => "http://$proxy:3128",
 328         'tls-port' => $port,
 329         'host-subject' => $subject,
 330         ca => $cacert,
 331         password => $ticket,
 332         'delete-this-file' => 1,
 333     };
 334
 335     return ($ticket, $proxyticket, $config);
 336 }
 337
 338 sub check_user_exist {
 339     my ($usercfg, $username, $noerr) = @_;
 340
 341     $username = PVE::Auth::Plugin::verify_username($username, $noerr);
 342     return undef if !$username;
 343
 344     return $usercfg->{users}->{$username} if $usercfg && $usercfg->{users}->{$username};
 345
 346     die "no such user ('$username')\n" if !$noerr;
 347
 348     return undef;
 349 }
 350
 351 sub check_user_enabled {
 352     my ($usercfg, $username, $noerr) = @_;
 353
 354     my $data = check_user_exist($usercfg, $username, $noerr);
 355     return undef if !$data;
 356
 357     return 1 if $data->{enable};
 358
 359     return 1 if $username eq 'root@pam'; # root is always enabled
 360
 361     die "user '$username' is disabled\n" if !$noerr;
 362
 363     return undef;
 364 }
 365
 366 sub verify_one_time_pw {
 367     my ($usercfg, $username, $tfa_cfg, $otp) = @_;
 368
 369     my $type = $tfa_cfg->{type};
 370
 371     die "missing one time password for Factor-two authentication '$type'\n" if !$otp;
 372
 373     # fixme: proxy support?
 374     my $proxy;
 375
 376     if ($type eq 'yubico') {
 377         my $keys = $usercfg->{users}->{$username}->{keys};
 378         yubico_verify_otp($otp, $keys, $tfa_cfg->{url}, $tfa_cfg->{id}, $tfa_cfg->{key}, $proxy);
 379     } else {
 380         die "unknown tfa type '$type'\n";
 381     }
 382 }
 383
 384 # password should be utf8 encoded
 385 # Note: some pluging delay/sleep if auth fails
 386 sub authenticate_user {
 387     my ($username, $password, $otp) = @_;
 388
 389     die "no username specified\n" if !$username;
 390
 391     my ($ruid, $realm);
 392
 393     ($username, $ruid, $realm) = PVE::Auth::Plugin::verify_username($username);
 394
 395     my $usercfg = cfs_read_file('user.cfg');
 396
 397     check_user_enabled($usercfg, $username);
 398
 399     my $ctime = time();
 400     my $expire = $usercfg->{users}->{$username}->{expire};
 401
 402     die "account expired\n" if $expire && ($expire < $ctime);
 403
 404     my $domain_cfg = cfs_read_file('domains.cfg');
 405
 406     my $cfg = $domain_cfg->{ids}->{$realm};
 407     die "auth domain '$realm' does not exists\n" if !$cfg;
 408     my $plugin = PVE::Auth::Plugin->lookup($cfg->{type});
 409     $plugin->authenticate_user($cfg, $realm, $ruid, $password);
 410
 411     if ($cfg->{tfa}) {
 412         my $tfa_cfg = PVE::Auth::Plugin::parse_tfa_config($cfg->{tfa});
 413         verify_one_time_pw($usercfg, $username, $tfa_cfg, $otp);
 414     }
 415
 416     return $username;
 417 }
 418
 419 sub domain_set_password {
 420     my ($realm, $username, $password) = @_;
 421
 422     die "no auth domain specified" if !$realm;
 423
 424     my $domain_cfg = cfs_read_file('domains.cfg');
 425
 426     my $cfg = $domain_cfg->{ids}->{$realm};
 427     die "auth domain '$realm' does not exists\n" if !$cfg;
 428     my $plugin = PVE::Auth::Plugin->lookup($cfg->{type});
 429     $plugin->store_password($cfg, $realm, $username, $password);
 430 }
 431
 432 sub add_user_group {
 433
 434     my ($username, $usercfg, $group) = @_;
 435     $usercfg->{users}->{$username}->{groups}->{$group} = 1;
 436     $usercfg->{groups}->{$group}->{users}->{$username} = 1;
 437 }
 438
 439 sub delete_user_group {
 440
 441     my ($username, $usercfg) = @_;
 442
 443     foreach my $group (keys %{$usercfg->{groups}}) {
 444
 445         delete ($usercfg->{groups}->{$group}->{users}->{$username})
 446             if $usercfg->{groups}->{$group}->{users}->{$username};
 447     }
 448 }
 449
 450 sub delete_user_acl {
 451
 452     my ($username, $usercfg) = @_;
 453
 454     foreach my $acl (keys %{$usercfg->{acl}}) {
 455
 456         delete ($usercfg->{acl}->{$acl}->{users}->{$username})
 457             if $usercfg->{acl}->{$acl}->{users}->{$username};
 458     }
 459 }
 460
 461 sub delete_group_acl {
 462
 463     my ($group, $usercfg) = @_;
 464
 465     foreach my $acl (keys %{$usercfg->{acl}}) {
 466
 467         delete ($usercfg->{acl}->{$acl}->{groups}->{$group})
 468             if $usercfg->{acl}->{$acl}->{groups}->{$group};
 469     }
 470 }
 471
 472 sub delete_pool_acl {
 473
 474     my ($pool, $usercfg) = @_;
 475
 476     my $path = "/pool/$pool";
 477
 478     foreach my $aclpath (keys %{$usercfg->{acl}}) {
 479         delete ($usercfg->{acl}->{$aclpath})
 480             if $usercfg->{acl}->{$aclpath} eq 'path';
 481     }
 482 }
 483
 484 # we automatically create some predefined roles by splitting privs
 485 # into 3 groups (per category)
 486 # root: only root is allowed to do that
 487 # admin: an administrator can to that
 488 # user: a normak user/customer can to that
 489 my $privgroups = {
 490     VM => {
 491         root => [],
 492         admin => [
 493             'VM.Config.Disk',
 494             'VM.Config.CPU',
 495             'VM.Config.Memory',
 496             'VM.Config.Network',
 497             'VM.Config.HWType',
 498             'VM.Config.Options', # covers all other things
 499             'VM.Allocate',
 500             'VM.Clone',
 501             'VM.Migrate',
 502             'VM.Monitor',
 503             'VM.Snapshot',
 504         ],
 505         user => [
 506             'VM.Config.CDROM', # change CDROM media
 507             'VM.Console',
 508             'VM.Backup',
 509             'VM.PowerMgmt',
 510         ],
 511         audit => [
 512             'VM.Audit',
 513         ],
 514     },
 515     Sys => {
 516         root => [
 517             'Sys.PowerMgmt',
 518             'Sys.Modify', # edit/change node settings
 519         ],
 520         admin => [
 521             'Permissions.Modify',
 522             'Sys.Console',
 523             'Sys.Syslog',
 524         ],
 525         user => [],
 526         audit => [
 527             'Sys.Audit',
 528         ],
 529     },
 530     Datastore => {
 531         root => [],
 532         admin => [
 533             'Datastore.Allocate',
 534             'Datastore.AllocateTemplate',
 535         ],
 536         user => [
 537             'Datastore.AllocateSpace',
 538         ],
 539         audit => [
 540             'Datastore.Audit',
 541         ],
 542     },
 543     User => {
 544         root => [
 545             'Realm.Allocate',
 546         ],
 547         admin => [
 548             'User.Modify',
 549             'Group.Allocate', # edit/change group settings
 550             'Realm.AllocateUser',
 551         ],
 552         user => [],
 553         audit => [],
 554     },
 555     Pool => {
 556         root => [],
 557         admin => [
 558             'Pool.Allocate', # create/delete pools
 559         ],
 560         user => [],
 561         audit => [],
 562     },
 563 };
 564
 565 my $valid_privs = {};
 566
 567 my $special_roles = {
 568     'NoAccess' => {}, # no priviledges
 569     'Administrator' => $valid_privs, # all priviledges
 570 };
 571
 572 sub create_roles {
 573
 574     foreach my $cat (keys %$privgroups) {
 575         my $cd = $privgroups->{$cat};
 576         foreach my $p (@{$cd->{root}}, @{$cd->{admin}},
 577                        @{$cd->{user}}, @{$cd->{audit}}) {
 578             $valid_privs->{$p} = 1;
 579         }
 580         foreach my $p (@{$cd->{admin}}, @{$cd->{user}}, @{$cd->{audit}}) {
 581
 582             $special_roles->{"PVE${cat}Admin"}->{$p} = 1;
 583             $special_roles->{"PVEAdmin"}->{$p} = 1;
 584         }
 585         if (scalar(@{$cd->{user}})) {
 586             foreach my $p (@{$cd->{user}}, @{$cd->{audit}}) {
 587                 $special_roles->{"PVE${cat}User"}->{$p} = 1;
 588             }
 589         }
 590         foreach my $p (@{$cd->{audit}}) {
 591             $special_roles->{"PVEAuditor"}->{$p} = 1;
 592         }
 593     }
 594
 595     $special_roles->{"PVETemplateUser"} = { 'VM.Clone' => 1, 'VM.Audit' => 1 };
 596 };
 597
 598 create_roles();
 599
 600 sub add_role_privs {
 601     my ($role, $usercfg, $privs) = @_;
 602
 603     return if !$privs;
 604
 605     die "role '$role' does not exist\n" if !$usercfg->{roles}->{$role};
 606
 607     foreach my $priv (split_list($privs)) {
 608         if (defined ($valid_privs->{$priv})) {
 609             $usercfg->{roles}->{$role}->{$priv} = 1;
 610         } else {
 611             die "invalid priviledge '$priv'\n";
 612         }
 613     }
 614 }
 615
 616 sub normalize_path {
 617     my $path = shift;
 618
 619     $path =~ s|/+|/|g;
 620
 621     $path =~ s|/$||;
 622
 623     $path = '/' if !$path;
 624
 625     $path = "/$path" if $path !~ m|^/|;
 626
 627     return undef if $path !~ m|^[[:alnum:]\.\-\_\/]+$|;
 628
 629     return $path;
 630 }
 631
 632
 633 PVE::JSONSchema::register_format('pve-groupid', \&verify_groupname);
 634 sub verify_groupname {
 635     my ($groupname, $noerr) = @_;
 636
 637     if ($groupname !~ m/^[A-Za-z0-9\.\-_]+$/) {
 638
 639         die "group name '$groupname' contains invalid characters\n" if !$noerr;
 640
 641         return undef;
 642     }
 643
 644     return $groupname;
 645 }
 646
 647 PVE::JSONSchema::register_format('pve-roleid', \&verify_rolename);
 648 sub verify_rolename {
 649     my ($rolename, $noerr) = @_;
 650
 651     if ($rolename !~ m/^[A-Za-z0-9\.\-_]+$/) {
 652
 653         die "role name '$rolename' contains invalid characters\n" if !$noerr;
 654
 655         return undef;
 656     }
 657
 658     return $rolename;
 659 }
 660
 661 PVE::JSONSchema::register_format('pve-poolid', \&verify_groupname);
 662 sub verify_poolname {
 663     my ($poolname, $noerr) = @_;
 664
 665     if ($poolname !~ m/^[A-Za-z0-9\.\-_]+$/) {
 666
 667         die "pool name '$poolname' contains invalid characters\n" if !$noerr;
 668
 669         return undef;
 670     }
 671
 672     return $poolname;
 673 }
 674
 675 PVE::JSONSchema::register_format('pve-priv', \&verify_privname);
 676 sub verify_privname {
 677     my ($priv, $noerr) = @_;
 678
 679     if (!$valid_privs->{$priv}) {
 680         die "invalid priviledge '$priv'\n" if !$noerr;
 681
 682         return undef;
 683     }
 684
 685     return $priv;
 686 }
 687
 688 sub userconfig_force_defaults {
 689     my ($cfg) = @_;
 690
 691     foreach my $r (keys %$special_roles) {
 692         $cfg->{roles}->{$r} = $special_roles->{$r};
 693     }
 694
 695     # fixme: remove 'root' group (not required)?
 696
 697     # add root user
 698     $cfg->{users}->{'root@pam'}->{enable} = 1;
 699 }
 700
 701 sub parse_user_config {
 702     my ($filename, $raw) = @_;
 703
 704     my $cfg = {};
 705
 706     userconfig_force_defaults($cfg);
 707
 708     while ($raw && $raw =~ s/^(.*?)(\n|$)//) {
 709         my $line = $1;
 710
 711         next if $line =~ m/^\s*$/; # skip empty lines
 712
 713         my @data;
 714
 715         foreach my $d (split (/:/, $line)) {
 716             $d =~ s/^\s+//;
 717             $d =~ s/\s+$//;
 718             push @data, $d
 719         }
 720
 721         my $et = shift @data;
 722
 723         if ($et eq 'user') {
 724             my ($user, $enable, $expire, $firstname, $lastname, $email, $comment, $keys) = @data;
 725
 726             my (undef, undef, $realm) = PVE::Auth::Plugin::verify_username($user, 1);
 727             if (!$realm) {
 728                 warn "user config - ignore user '$user' - invalid user name\n";
 729                 next;
 730             }
 731
 732             $enable = $enable ? 1 : 0;
 733
 734             $expire = 0 if !$expire;
 735
 736             if ($expire !~ m/^\d+$/) {
 737                 warn "user config - ignore user '$user' - (illegal characters in expire '$expire')\n";
 738                 next;
 739             }
 740             $expire = int($expire);
 741
 742             #if (!verify_groupname ($group, 1)) {
 743             #    warn "user config - ignore user '$user' - invalid characters in group name\n";
 744             #    next;
 745             #}
 746
 747             $cfg->{users}->{$user} = {
 748                 enable => $enable,
 749                 # group => $group,
 750             };
 751             $cfg->{users}->{$user}->{firstname} = PVE::Tools::decode_text($firstname) if $firstname;
 752             $cfg->{users}->{$user}->{lastname} = PVE::Tools::decode_text($lastname) if $lastname;
 753             $cfg->{users}->{$user}->{email} = $email;
 754             $cfg->{users}->{$user}->{comment} = PVE::Tools::decode_text($comment) if $comment;
 755             $cfg->{users}->{$user}->{expire} = $expire;
 756             $cfg->{users}->{$user}->{keys} = $keys if $keys; # allowed yubico key ids
 757
 758             #$cfg->{users}->{$user}->{groups}->{$group} = 1;
 759             #$cfg->{groups}->{$group}->{$user} = 1;
 760
 761         } elsif ($et eq 'group') {
 762             my ($group, $userlist, $comment) = @data;
 763
 764             if (!verify_groupname($group, 1)) {
 765                 warn "user config - ignore group '$group' - invalid characters in group name\n";
 766                 next;
 767             }
 768
 769             # make sure to add the group (even if there are no members)
 770             $cfg->{groups}->{$group} = { users => {} } if !$cfg->{groups}->{$group};
 771
 772             $cfg->{groups}->{$group}->{comment} = PVE::Tools::decode_text($comment) if $comment;
 773
 774             foreach my $user (split_list($userlist)) {
 775
 776                 if (!PVE::Auth::Plugin::verify_username($user, 1)) {
 777                     warn "user config - ignore invalid group member '$user'\n";
 778                     next;
 779                 }
 780
 781                 if ($cfg->{users}->{$user}) { # user exists
 782                     $cfg->{users}->{$user}->{groups}->{$group} = 1;
 783                     $cfg->{groups}->{$group}->{users}->{$user} = 1;
 784                 } else {
 785                     warn "user config - ignore invalid group member '$user'\n";
 786                 }
 787             }
 788
 789         } elsif ($et eq 'role') {
 790             my ($role, $privlist) = @data;
 791
 792             if (!verify_rolename($role, 1)) {
 793                 warn "user config - ignore role '$role' - invalid characters in role name\n";
 794                 next;
 795             }
 796
 797             # make sure to add the role (even if there are no privileges)
 798             $cfg->{roles}->{$role} = {} if !$cfg->{roles}->{$role};
 799
 800             foreach my $priv (split_list($privlist)) {
 801                 if (defined ($valid_privs->{$priv})) {
 802                     $cfg->{roles}->{$role}->{$priv} = 1;
 803                 } else {
 804                     warn "user config - ignore invalid priviledge '$priv'\n";
 805                 }
 806             }
 807
 808         } elsif ($et eq 'acl') {
 809             my ($propagate, $pathtxt, $uglist, $rolelist) = @data;
 810
 811             if (my $path = normalize_path($pathtxt)) {
 812                 foreach my $role (split_list($rolelist)) {
 813
 814                     if (!verify_rolename($role, 1)) {
 815                         warn "user config - ignore invalid role name '$role' in acl\n";
 816                         next;
 817                     }
 818
 819                     foreach my $ug (split_list($uglist)) {
 820                         if ($ug =~ m/^@(\S+)$/) {
 821                             my $group = $1;
 822                             if ($cfg->{groups}->{$group}) { # group exists
 823                                 $cfg->{acl}->{$path}->{groups}->{$group}->{$role} = $propagate;
 824                             } else {
 825                                 warn "user config - ignore invalid acl group '$group'\n";
 826                             }
 827                         } elsif (PVE::Auth::Plugin::verify_username($ug, 1)) {
 828                             if ($cfg->{users}->{$ug}) { # user exists
 829                                 $cfg->{acl}->{$path}->{users}->{$ug}->{$role} = $propagate;
 830                             } else {
 831                                 warn "user config - ignore invalid acl member '$ug'\n";
 832                             }
 833                         } else {
 834                             warn "user config - invalid user/group '$ug' in acl\n";
 835                         }
 836                     }
 837                 }
 838             } else {
 839                 warn "user config - ignore invalid path in acl '$pathtxt'\n";
 840             }
 841         } elsif ($et eq 'pool') {
 842             my ($pool, $comment, $vmlist, $storelist) = @data;
 843
 844             if (!verify_poolname($pool, 1)) {
 845                 warn "user config - ignore pool '$pool' - invalid characters in pool name\n";
 846                 next;
 847             }
 848
 849             # make sure to add the pool (even if there are no members)
 850             $cfg->{pools}->{$pool} = { vms => {}, storage => {} } if !$cfg->{pools}->{$pool};
 851
 852             $cfg->{pools}->{$pool}->{comment} = PVE::Tools::decode_text($comment) if $comment;
 853
 854             foreach my $vmid (split_list($vmlist)) {
 855                 if ($vmid !~ m/^\d+$/) {
 856                     warn "user config - ignore invalid vmid '$vmid' in pool '$pool'\n";
 857                     next;
 858                 }
 859                 $vmid = int($vmid);
 860
 861                 if ($cfg->{vms}->{$vmid}) {
 862                     warn "user config - ignore duplicate vmid '$vmid' in pool '$pool'\n";
 863                     next;
 864                 }
 865
 866                 $cfg->{pools}->{$pool}->{vms}->{$vmid} = 1;
 867
 868                 # record vmid ==> pool relation
 869                 $cfg->{vms}->{$vmid} = $pool;
 870             }
 871
 872             foreach my $storeid (split_list($storelist)) {
 873                 if ($storeid !~ m/^[a-z][a-z0-9\-\_\.]*[a-z0-9]$/i) {
 874                     warn "user config - ignore invalid storage '$storeid' in pool '$pool'\n";
 875                     next;
 876                 }
 877                 $cfg->{pools}->{$pool}->{storage}->{$storeid} = 1;
 878             }
 879         } else {
 880             warn "user config - ignore config line: $line\n";
 881         }
 882     }
 883
 884     userconfig_force_defaults($cfg);
 885
 886     return $cfg;
 887 }
 888
 889 sub write_user_config {
 890     my ($filename, $cfg) = @_;
 891
 892     my $data = '';
 893
 894     foreach my $user (keys %{$cfg->{users}}) {
 895         my $d = $cfg->{users}->{$user};
 896         my $firstname = $d->{firstname} ? PVE::Tools::encode_text($d->{firstname}) : '';
 897         my $lastname = $d->{lastname} ? PVE::Tools::encode_text($d->{lastname}) : '';
 898         my $email = $d->{email} || '';
 899         my $comment = $d->{comment} ? PVE::Tools::encode_text($d->{comment}) : '';
 900         my $expire = int($d->{expire} || 0);
 901         my $enable = $d->{enable} ? 1 : 0;
 902         my $keys = $d->{keys} ? $d->{keys} : '';
 903         $data .= "user:$user:$enable:$expire:$firstname:$lastname:$email:$comment:$keys:\n";
 904     }
 905
 906     $data .= "\n";
 907
 908     foreach my $group (keys %{$cfg->{groups}}) {
 909         my $d = $cfg->{groups}->{$group};
 910         my $list = join (',', keys %{$d->{users}});
 911         my $comment = $d->{comment} ? PVE::Tools::encode_text($d->{comment}) : '';
 912         $data .= "group:$group:$list:$comment:\n";
 913     }
 914
 915     $data .= "\n";
 916
 917     foreach my $pool (keys %{$cfg->{pools}}) {
 918         my $d = $cfg->{pools}->{$pool};
 919         my $vmlist = join (',', keys %{$d->{vms}});
 920         my $storelist = join (',', keys %{$d->{storage}});
 921         my $comment = $d->{comment} ? PVE::Tools::encode_text($d->{comment}) : '';
 922         $data .= "pool:$pool:$comment:$vmlist:$storelist:\n";
 923     }
 924
 925     $data .= "\n";
 926
 927     foreach my $role (keys %{$cfg->{roles}}) {
 928         next if $special_roles->{$role};
 929
 930         my $d = $cfg->{roles}->{$role};
 931         my $list = join (',', keys %$d);
 932         $data .= "role:$role:$list:\n";
 933     }
 934
 935     $data .= "\n";
 936
 937     foreach my $path (sort keys %{$cfg->{acl}}) {
 938         my $d = $cfg->{acl}->{$path};
 939
 940         my $ra = {};
 941
 942         foreach my $group (keys %{$d->{groups}}) {
 943             my $l0 = '';
 944             my $l1 = '';
 945             foreach my $role (sort keys %{$d->{groups}->{$group}}) {
 946                 my $propagate = $d->{groups}->{$group}->{$role};
 947                 if ($propagate) {
 948                     $l1 .= ',' if $l1;
 949                     $l1 .= $role;
 950                 } else {
 951                     $l0 .= ',' if $l0;
 952                     $l0 .= $role;
 953                 }
 954             }
 955             $ra->{0}->{$l0}->{"\@$group"} = 1 if $l0;
 956             $ra->{1}->{$l1}->{"\@$group"} = 1 if $l1;
 957         }
 958
 959         foreach my $user (keys %{$d->{users}}) {
 960             # no need to save, because root is always 'Administartor'
 961             next if $user eq 'root@pam';
 962
 963             my $l0 = '';
 964             my $l1 = '';
 965             foreach my $role (sort keys %{$d->{users}->{$user}}) {
 966                 my $propagate = $d->{users}->{$user}->{$role};
 967                 if ($propagate) {
 968                     $l1 .= ',' if $l1;
 969                     $l1 .= $role;
 970                 } else {
 971                     $l0 .= ',' if $l0;
 972                     $l0 .= $role;
 973                 }
 974             }
 975             $ra->{0}->{$l0}->{$user} = 1 if $l0;
 976             $ra->{1}->{$l1}->{$user} = 1 if $l1;
 977         }
 978
 979         foreach my $rolelist (sort keys %{$ra->{0}}) {
 980             my $uglist = join (',', keys %{$ra->{0}->{$rolelist}});
 981             $data .= "acl:0:$path:$uglist:$rolelist:\n";
 982         }
 983         foreach my $rolelist (sort keys %{$ra->{1}}) {
 984             my $uglist = join (',', keys %{$ra->{1}->{$rolelist}});
 985             $data .= "acl:1:$path:$uglist:$rolelist:\n";
 986         }
 987     }
 988
 989     return $data;
 990 }
 991
 992 sub roles {
 993     my ($cfg, $user, $path) = @_;
 994
 995     # NOTE: we do not consider pools here.
 996     # You need to use $rpcenv->roles() instead if you want that.
 997
 998     return 'Administrator' if $user eq 'root@pam'; # root can do anything
 999
1000     my $perm = {};
1001
1002     foreach my $p (sort keys %{$cfg->{acl}}) {
1003         my $final = ($path eq $p);
1004
1005         next if !(($p eq '/') || $final || ($path =~ m|^$p/|));
1006
1007         my $acl = $cfg->{acl}->{$p};
1008
1009         #print "CHECKACL $path $p\n";
1010         #print "ACL $path = " . Dumper ($acl);
1011
1012         if (my $ri = $acl->{users}->{$user}) {
1013             my $new;
1014             foreach my $role (keys %$ri) {
1015                 my $propagate = $ri->{$role};
1016                 if ($final || $propagate) {
1017                     #print "APPLY ROLE $p $user $role\n";
1018                     $new = {} if !$new;
1019                     $new->{$role} = 1;
1020                 }
1021             }
1022             if ($new) {
1023                 $perm = $new; # overwrite previous settings
1024                 next; # user privs always override group privs
1025             }
1026         }
1027
1028         my $new;
1029         foreach my $g (keys %{$acl->{groups}}) {
1030             next if !$cfg->{groups}->{$g}->{users}->{$user};
1031             if (my $ri = $acl->{groups}->{$g}) {
1032                 foreach my $role (keys %$ri) {
1033                     my $propagate = $ri->{$role};
1034                     if ($final || $propagate) {
1035                         #print "APPLY ROLE $p \@$g $role\n";
1036                         $new = {} if !$new;
1037                         $new->{$role} = 1;
1038                     }
1039                 }
1040             }
1041         }
1042         if ($new) {
1043             $perm = $new; # overwrite previous settings
1044             next;
1045         }
1046     }
1047
1048     return ('NoAccess') if defined ($perm->{NoAccess});
1049     #return () if defined ($perm->{NoAccess});
1050
1051     #print "permission $user $path = " . Dumper ($perm);
1052
1053     my @ra = keys %$perm;
1054
1055     #print "roles $user $path = " . join (',', @ra) . "\n";
1056
1057     return @ra;
1058 }
1059
1060 sub permission {
1061     my ($cfg, $user, $path) = @_;
1062
1063     $user = PVE::Auth::Plugin::verify_username($user, 1);
1064     return {} if !$user;
1065
1066     my @ra = roles($cfg, $user, $path);
1067
1068     my $privs = {};
1069
1070     foreach my $role (@ra) {
1071         if (my $privset = $cfg->{roles}->{$role}) {
1072             foreach my $p (keys %$privset) {
1073                 $privs->{$p} = 1;
1074             }
1075         }
1076     }
1077
1078     #print "priviledges $user $path = " . Dumper ($privs);
1079
1080     return $privs;
1081 }
1082
1083 sub check_permissions {
1084     my ($username, $path, $privlist) = @_;
1085
1086     $path = normalize_path($path);
1087     my $usercfg = cfs_read_file('user.cfg');
1088     my $perm = permission($usercfg, $username, $path);
1089
1090     foreach my $priv (split_list($privlist)) {
1091         return undef if !$perm->{$priv};
1092     };
1093
1094     return 1;
1095 }
1096
1097 sub add_vm_to_pool {
1098     my ($vmid, $pool) = @_;
1099
1100     my $addVMtoPoolFn = sub {
1101         my $usercfg = cfs_read_file("user.cfg");
1102         if (my $data = $usercfg->{pools}->{$pool}) {
1103             $data->{vms}->{$vmid} = 1;
1104             $usercfg->{vms}->{$vmid} = $pool;
1105             cfs_write_file("user.cfg", $usercfg);
1106         }
1107     };
1108
1109     lock_user_config($addVMtoPoolFn, "can't add VM $vmid to pool '$pool'");
1110 }
1111
1112 sub remove_vm_from_pool {
1113     my ($vmid) = @_;
1114
1115     my $delVMfromPoolFn = sub {
1116         my $usercfg = cfs_read_file("user.cfg");
1117         if (my $pool = $usercfg->{vms}->{$vmid}) {
1118             if (my $data = $usercfg->{pools}->{$pool}) {
1119                 delete $data->{vms}->{$vmid};
1120                 delete $usercfg->{vms}->{$vmid};
1121                 cfs_write_file("user.cfg", $usercfg);
1122             }
1123         }
1124     };
1125
1126     lock_user_config($delVMfromPoolFn, "pool cleanup for VM $vmid failed");
1127 }
1128
1129 # experimental code for yubico OTP verification
1130
1131 sub yubico_compute_param_sig {
1132     my ($param, $api_key) = @_;
1133
1134     my $paramstr = '';
1135     foreach my $key (sort keys %$param) {
1136         $paramstr .= '&' if $paramstr;
1137         $paramstr .= "$key=$param->{$key}";
1138     }
1139
1140     my $sig = uri_escape(encode_base64(Digest::HMAC_SHA1::hmac_sha1($paramstr, decode_base64($api_key || '')), ''));
1141
1142     return ($paramstr, $sig);
1143 }
1144
1145 sub yubico_verify_otp {
1146     my ($otp, $keys, $url, $api_id, $api_key, $proxy) = @_;
1147
1148     die "yubico: missing password\n" if !defined($otp);
1149     die "yubico: missing API ID\n" if !defined($api_id);
1150     die "yubico: missing API KEY\n" if !defined($api_key);
1151     die "yubico: no associated yubico keys\n" if $keys =~ m/^\s+$/;
1152
1153     die "yubico: wrong OTP lenght\n" if (length($otp) < 32) || (length($otp) > 48);
1154
1155     # we always use http, because https cert verification always make problem, and
1156     # some proxies does not work with https.
1157
1158     $url = 'http://api2.yubico.com/wsapi/2.0/verify' if !defined($url);
1159
1160     my $params = {
1161         nonce =>  Digest::HMAC_SHA1::hmac_sha1_hex(time(), rand()),
1162         id => $api_id,
1163         otp => uri_escape($otp),
1164         timestamp => 1,
1165     };
1166
1167     my ($paramstr, $sig) = yubico_compute_param_sig($params, $api_key);
1168
1169     $paramstr .= "&h=$sig" if $api_key;
1170
1171     my $req = HTTP::Request->new('GET' => "$url?$paramstr");
1172
1173     my $ua = LWP::UserAgent->new(protocols_allowed => ['http'], timeout => 30);
1174
1175     if ($proxy) {
1176         $ua->proxy(['http'], $proxy);
1177     } else {
1178         $ua->env_proxy;
1179     }
1180
1181     my $response = $ua->request($req);
1182     my $code = $response->code;
1183
1184     if ($code != 200) {
1185         my $msg = $response->message || 'unknown';
1186         die "Invalid response from server: $code $msg\n";
1187     }
1188
1189     my $raw = $response->decoded_content;
1190
1191     my $result = {};
1192     foreach my $kvpair (split(/\n/, $raw)) {
1193         chomp $kvpair;
1194         if($kvpair =~ /^\S+=/) {
1195             my ($k, $v) = split(/=/, $kvpair, 2);
1196             $v =~ s/\s//g;
1197             $result->{$k} = $v;
1198         }
1199     }
1200
1201     my $rsig = $result->{h};
1202     delete $result->{h};
1203
1204     if ($api_key) {
1205         my ($datastr, $vsig) = yubico_compute_param_sig($result, $api_key);
1206         $vsig = uri_unescape($vsig);
1207         die "yubico: result signature verification failed\n" if $rsig ne $vsig;
1208     }
1209
1210     die "yubico auth failed: $result->{status}\n" if $result->{status} ne 'OK';
1211
1212     my $publicid = $result->{publicid} = substr(lc($result->{otp}), 0, 12);
1213
1214     my $found;
1215     foreach my $k (PVE::Tools::split_list($keys)) {
1216         if ($k eq $publicid) {
1217             $found = 1;
1218             last;
1219         }
1220     }
1221
1222     die "yubico auth failed: key does not belong to user\n" if !$found;
1223
1224     return $result;
1225 }
1226
1227 1;