SabreDAV /lib/Sabre/DAVACL/Plugin.php

Language PHP Lines 1406
MD5 Hash f0fabd4baa6ea55f4f00d23f384d4c16
Repository https://github.com/KOLANICH/SabreDAV.git View Raw File
   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
<?php

namespace Sabre\DAVACL;
use Sabre\DAV;

/**
 * SabreDAV ACL Plugin
 *
 * This plugin provides functionality to enforce ACL permissions.
 * ACL is defined in RFC3744.
 *
 * In addition it also provides support for the {DAV:}current-user-principal
 * property, defined in RFC5397 and the {DAV:}expand-property report, as
 * defined in RFC3253.
 *
 * @copyright Copyright (C) 2007-2013 fruux GmbH (https://fruux.com/).
 * @author Evert Pot (http://evertpot.com/)
 * @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
 */
class Plugin extends DAV\ServerPlugin {

    /**
     * Recursion constants
     *
     * This only checks the base node
     */
    const R_PARENT = 1;

    /**
     * Recursion constants
     *
     * This checks every node in the tree
     */
    const R_RECURSIVE = 2;

    /**
     * Recursion constants
     *
     * This checks every parentnode in the tree, but not leaf-nodes.
     */
    const R_RECURSIVEPARENTS = 3;

    /**
     * Reference to server object.
     *
     * @var Sabre\DAV\Server
     */
    protected $server;

    /**
     * List of urls containing principal collections.
     * Modify this if your principals are located elsewhere.
     *
     * @var array
     */
    public $principalCollectionSet = array(
        'principals',
    );

    /**
     * By default ACL is only enforced for nodes that have ACL support (the
     * ones that implement IACL). For any other node, access is
     * always granted.
     *
     * To override this behaviour you can turn this setting off. This is useful
     * if you plan to fully support ACL in the entire tree.
     *
     * @var bool
     */
    public $allowAccessToNodesWithoutACL = true;

    /**
     * By default nodes that are inaccessible by the user, can still be seen
     * in directory listings (PROPFIND on parent with Depth: 1)
     *
     * In certain cases it's desirable to hide inaccessible nodes. Setting this
     * to true will cause these nodes to be hidden from directory listings.
     *
     * @var bool
     */
    public $hideNodesFromListings = false;

    /**
     * This string is prepended to the username of the currently logged in
     * user. This allows the plugin to determine the principal path based on
     * the username.
     *
     * @var string
     */
    public $defaultUsernamePath = 'principals';

    /**
     * This list of properties are the properties a client can search on using
     * the {DAV:}principal-property-search report.
     *
     * The keys are the property names, values are descriptions.
     *
     * @var array
     */
    public $principalSearchPropertySet = array(
        '{DAV:}displayname' => 'Display name',
        '{http://sabredav.org/ns}email-address' => 'Email address',
    );

    /**
     * Any principal uri's added here, will automatically be added to the list
     * of ACL's. They will effectively receive {DAV:}all privileges, as a
     * protected privilege.
     *
     * @var array
     */
    public $adminPrincipals = array();

    /**
     * Returns a list of features added by this plugin.
     *
     * This list is used in the response of a HTTP OPTIONS request.
     *
     * @return array
     */
    public function getFeatures() {

        return array('access-control', 'calendarserver-principal-property-search');

    }

    /**
     * Returns a list of available methods for a given url
     *
     * @param string $uri
     * @return array
     */
    public function getMethods($uri) {

        return array('ACL');

    }

    /**
     * Returns a plugin name.
     *
     * Using this name other plugins will be able to access other plugins
     * using Sabre\DAV\Server::getPlugin
     *
     * @return string
     */
    public function getPluginName() {

        return 'acl';

    }

    /**
     * Returns a list of reports this plugin supports.
     *
     * This will be used in the {DAV:}supported-report-set property.
     * Note that you still need to subscribe to the 'report' event to actually
     * implement them
     *
     * @param string $uri
     * @return array
     */
    public function getSupportedReportSet($uri) {

        return array(
            '{DAV:}expand-property',
            '{DAV:}principal-property-search',
            '{DAV:}principal-search-property-set',
        );

    }


    /**
     * Checks if the current user has the specified privilege(s).
     *
     * You can specify a single privilege, or a list of privileges.
     * This method will throw an exception if the privilege is not available
     * and return true otherwise.
     *
     * @param string $uri
     * @param array|string $privileges
     * @param int $recursion
     * @param bool $throwExceptions if set to false, this method won't throw exceptions.
     * @throws Sabre\DAVACL\Exception\NeedPrivileges
     * @return bool
     */
    public function checkPrivileges($uri, $privileges, $recursion = self::R_PARENT, $throwExceptions = true) {

        if (!is_array($privileges)) $privileges = array($privileges);

        $acl = $this->getCurrentUserPrivilegeSet($uri);

        if (is_null($acl)) {
            if ($this->allowAccessToNodesWithoutACL) {
                return true;
            } else {
                if ($throwExceptions)
                    throw new Exception\NeedPrivileges($uri,$privileges);
                else
                    return false;

            }
        }

        $failed = array();
        foreach($privileges as $priv) {

            if (!in_array($priv, $acl)) {
                $failed[] = $priv;
            }

        }

        if ($failed) {
            if ($throwExceptions)
                throw new Exception\NeedPrivileges($uri,$failed);
            else
                return false;
        }
        return true;

    }

    /**
     * Returns the standard users' principal.
     *
     * This is one authorative principal url for the current user.
     * This method will return null if the user wasn't logged in.
     *
     * @return string|null
     */
    public function getCurrentUserPrincipal() {

        $authPlugin = $this->server->getPlugin('auth');
        if (is_null($authPlugin)) return null;
        /** @var $authPlugin Sabre\DAV\Auth\Plugin */

        $userName = $authPlugin->getCurrentUser();
        if (!$userName) return null;

        return $this->defaultUsernamePath . '/' . $userName;

    }


    /**
     * Returns a list of principals that's associated to the current
     * user, either directly or through group membership.
     *
     * @return array
     */
    public function getCurrentUserPrincipals() {

        $currentUser = $this->getCurrentUserPrincipal();

        if (is_null($currentUser)) return array();

        return array_merge(
            array($currentUser),
            $this->getPrincipalMembership($currentUser)
        );

    }

    /**
     * This array holds a cache for all the principals that are associated with
     * a single principal.
     *
     * @var array
     */
    protected $principalMembershipCache = array();


    /**
     * Returns all the principal groups the specified principal is a member of.
     *
     * @param string $principal
     * @return array
     */
    public function getPrincipalMembership($mainPrincipal) {

        // First check our cache
        if (isset($this->principalMembershipCache[$mainPrincipal])) {
            return $this->principalMembershipCache[$mainPrincipal];
        }

        $check = array($mainPrincipal);
        $principals = array();

        while(count($check)) {

            $principal = array_shift($check);

            $node = $this->server->tree->getNodeForPath($principal);
            if ($node instanceof IPrincipal) {
                foreach($node->getGroupMembership() as $groupMember) {

                    if (!in_array($groupMember, $principals)) {

                        $check[] = $groupMember;
                        $principals[] = $groupMember;

                    }

                }

            }

        }

        // Store the result in the cache
        $this->principalMembershipCache[$mainPrincipal] = $principals;

        return $principals;

    }

    /**
     * Returns the supported privilege structure for this ACL plugin.
     *
     * See RFC3744 for more details. Currently we default on a simple,
     * standard structure.
     *
     * You can either get the list of privileges by a uri (path) or by
     * specifying a Node.
     *
     * @param string|DAV\INode $node
     * @return array
     */
    public function getSupportedPrivilegeSet($node) {

        if (is_string($node)) {
            $node = $this->server->tree->getNodeForPath($node);
        }

        if ($node instanceof IACL) {
            $result = $node->getSupportedPrivilegeSet();

            if ($result)
                return $result;
        }

        return self::getDefaultSupportedPrivilegeSet();

    }

    /**
     * Returns a fairly standard set of privileges, which may be useful for
     * other systems to use as a basis.
     *
     * @return array
     */
    static function getDefaultSupportedPrivilegeSet() {

        return [
            'privilege'  => '{DAV:}all',
            'abstract'   => true,
            'aggregates' => [
                [
                    'privilege'  => '{DAV:}read',
                    'aggregates' => [
                        [
                            'privilege' => '{DAV:}read-acl',
                            'abstract'  => false,
                        ],
                        [
                            'privilege' => '{DAV:}read-current-user-privilege-set',
                            'abstract'  => false,
                        ],
                    ],
                ], // {DAV:}read
                [
                    'privilege'  => '{DAV:}write',
                    'aggregates' => [
                        [
                            'privilege' => '{DAV:}write-acl',
                            'abstract'  => false,
                        ],
                        [
                            'privilege' => '{DAV:}write-properties',
                            'abstract'  => false,
                        ],
                        [
                            'privilege' => '{DAV:}write-content',
                            'abstract'  => false,
                        ],
                        [
                            'privilege' => '{DAV:}bind',
                            'abstract'  => false,
                        ],
                        [
                            'privilege' => '{DAV:}unbind',
                            'abstract'  => false,
                        ],
                        [
                            'privilege' => '{DAV:}unlock',
                            'abstract'  => false,
                        ],
                    ],
                ], // {DAV:}write
            ],
        ]; // {DAV:}all

    }

    /**
     * Returns the supported privilege set as a flat list
     *
     * This is much easier to parse.
     *
     * The returned list will be index by privilege name.
     * The value is a struct containing the following properties:
     *   - aggregates
     *   - abstract
     *   - concrete
     *
     * @param string|DAV\INode $node
     * @return array
     */
    final public function getFlatPrivilegeSet($node) {

        $privs = $this->getSupportedPrivilegeSet($node);

        $flat = array();
        $this->getFPSTraverse($privs, null, $flat);

        return $flat;

    }

    /**
     * Traverses the privilege set tree for reordering
     *
     * This function is solely used by getFlatPrivilegeSet, and would have been
     * a closure if it wasn't for the fact I need to support PHP 5.2.
     *
     * @param array $priv
     * @param $concrete
     * @param array $flat
     * @return void
     */
    final private function getFPSTraverse($priv, $concrete, &$flat) {

        $myPriv = array(
            'privilege' => $priv['privilege'],
            'abstract' => isset($priv['abstract']) && $priv['abstract'],
            'aggregates' => array(),
            'concrete' => isset($priv['abstract']) && $priv['abstract']?$concrete:$priv['privilege'],
        );

        if (isset($priv['aggregates']))
            foreach($priv['aggregates'] as $subPriv) $myPriv['aggregates'][] = $subPriv['privilege'];

        $flat[$priv['privilege']] = $myPriv;

        if (isset($priv['aggregates'])) {

            foreach($priv['aggregates'] as $subPriv) {

                $this->getFPSTraverse($subPriv, $myPriv['concrete'], $flat);

            }

        }

    }

    /**
     * Returns the full ACL list.
     *
     * Either a uri or a DAV\INode may be passed.
     *
     * null will be returned if the node doesn't support ACLs.
     *
     * @param string|DAV\INode $node
     * @return array
     */
    public function getACL($node) {

        if (is_string($node)) {
            $node = $this->server->tree->getNodeForPath($node);
        }
        if (!$node instanceof IACL) {
            return null;
        }
        $acl = $node->getACL();
        foreach($this->adminPrincipals as $adminPrincipal) {
            $acl[] = array(
                'principal' => $adminPrincipal,
                'privilege' => '{DAV:}all',
                'protected' => true,
            );
        }
        return $acl;

    }

    /**
     * Returns a list of privileges the current user has
     * on a particular node.
     *
     * Either a uri or a DAV\INode may be passed.
     *
     * null will be returned if the node doesn't support ACLs.
     *
     * @param string|DAV\INode $node
     * @return array
     */
    public function getCurrentUserPrivilegeSet($node) {

        if (is_string($node)) {
            $node = $this->server->tree->getNodeForPath($node);
        }

        $acl = $this->getACL($node);

        if (is_null($acl)) return null;

        $principals = $this->getCurrentUserPrincipals();

        $collected = array();

        foreach($acl as $ace) {

            $principal = $ace['principal'];

            switch($principal) {

                case '{DAV:}owner' :
                    $owner = $node->getOwner();
                    if ($owner && in_array($owner, $principals)) {
                        $collected[] = $ace;
                    }
                    break;


                // 'all' matches for every user
                case '{DAV:}all' :

                // 'authenticated' matched for every user that's logged in.
                // Since it's not possible to use ACL while not being logged
                // in, this is also always true.
                case '{DAV:}authenticated' :
                    $collected[] = $ace;
                    break;

                // 'unauthenticated' can never occur either, so we simply
                // ignore these.
                case '{DAV:}unauthenticated' :
                    break;

                default :
                    if (in_array($ace['principal'], $principals)) {
                        $collected[] = $ace;
                    }
                    break;

            }


        }

        // Now we deduct all aggregated privileges.
        $flat = $this->getFlatPrivilegeSet($node);

        $collected2 = array();
        while(count($collected)) {

            $current = array_pop($collected);
            $collected2[] = $current['privilege'];

            foreach($flat[$current['privilege']]['aggregates'] as $subPriv) {
                $collected2[] = $subPriv;
                $collected[] = $flat[$subPriv];
            }

        }

        return array_values(array_unique($collected2));

    }

    /**
     * Principal property search
     *
     * This method can search for principals matching certain values in
     * properties.
     *
     * This method will return a list of properties for the matched properties.
     *
     * @param array $searchProperties    The properties to search on. This is a
     *                                   key-value list. The keys are property
     *                                   names, and the values the strings to
     *                                   match them on.
     * @param array $requestedProperties This is the list of properties to
     *                                   return for every match.
     * @param string $collectionUri      The principal collection to search on.
     *                                   If this is ommitted, the standard
     *                                   principal collection-set will be used.
     * @return array     This method returns an array structure similar to
     *                  Sabre\DAV\Server::getPropertiesForPath. Returned
     *                  properties are index by a HTTP status code.
     *
     */
    public function principalSearch(array $searchProperties, array $requestedProperties, $collectionUri = null) {

        if (!is_null($collectionUri)) {
            $uris = array($collectionUri);
        } else {
            $uris = $this->principalCollectionSet;
        }

        $lookupResults = array();
        foreach($uris as $uri) {

            $principalCollection = $this->server->tree->getNodeForPath($uri);
            if (!$principalCollection instanceof IPrincipalCollection) {
                // Not a principal collection, we're simply going to ignore
                // this.
                continue;
            }

            $results = $principalCollection->searchPrincipals($searchProperties);
            foreach($results as $result) {
                $lookupResults[] = rtrim($uri,'/') . '/' . $result;
            }

        }

        $matches = array();

        foreach($lookupResults as $lookupResult) {

            list($matches[]) = $this->server->getPropertiesForPath($lookupResult, $requestedProperties, 0);

        }

        return $matches;

    }

    /**
     * Sets up the plugin
     *
     * This method is automatically called by the server class.
     *
     * @param DAV\Server $server
     * @return void
     */
    public function initialize(DAV\Server $server) {

        $this->server = $server;
        $server->subscribeEvent('beforeGetProperties',array($this,'beforeGetProperties'));

        $server->subscribeEvent('beforeMethod', array($this,'beforeMethod'),20);
        $server->subscribeEvent('beforeBind', array($this,'beforeBind'),20);
        $server->subscribeEvent('beforeUnbind', array($this,'beforeUnbind'),20);
        $server->subscribeEvent('updateProperties',array($this,'updateProperties'));
        $server->subscribeEvent('beforeUnlock', array($this,'beforeUnlock'),20);
        $server->subscribeEvent('report',array($this,'report'));
        $server->subscribeEvent('unknownMethod', array($this, 'unknownMethod'));

        array_push($server->protectedProperties,
            '{DAV:}alternate-URI-set',
            '{DAV:}principal-URL',
            '{DAV:}group-membership',
            '{DAV:}principal-collection-set',
            '{DAV:}current-user-principal',
            '{DAV:}supported-privilege-set',
            '{DAV:}current-user-privilege-set',
            '{DAV:}acl',
            '{DAV:}acl-restrictions',
            '{DAV:}inherited-acl-set',
            '{DAV:}owner',
            '{DAV:}group'
        );

        // Automatically mapping nodes implementing IPrincipal to the
        // {DAV:}principal resourcetype.
        $server->resourceTypeMapping['Sabre\\DAVACL\\IPrincipal'] = '{DAV:}principal';

        // Mapping the group-member-set property to the HrefList property
        // class.
        $server->propertyMap['{DAV:}group-member-set'] = 'Sabre\\DAV\\Property\\HrefList';

    }


    /* {{{ Event handlers */

    /**
     * Triggered before any method is handled
     *
     * @param string $method
     * @param string $uri
     * @return void
     */
    public function beforeMethod($method, $uri) {

        $exists = $this->server->tree->nodeExists($uri);

        // If the node doesn't exists, none of these checks apply
        if (!$exists) return;

        switch($method) {

            case 'GET' :
            case 'HEAD' :
            case 'OPTIONS' :
                // For these 3 we only need to know if the node is readable.
                $this->checkPrivileges($uri,'{DAV:}read');
                break;

            case 'PUT' :
            case 'LOCK' :
            case 'UNLOCK' :
                // This method requires the write-content priv if the node
                // already exists, and bind on the parent if the node is being
                // created.
                // The bind privilege is handled in the beforeBind event.
                $this->checkPrivileges($uri,'{DAV:}write-content');
                break;


            case 'PROPPATCH' :
                $this->checkPrivileges($uri,'{DAV:}write-properties');
                break;

            case 'ACL' :
                $this->checkPrivileges($uri,'{DAV:}write-acl');
                break;

            case 'COPY' :
            case 'MOVE' :
                // Copy requires read privileges on the entire source tree.
                // If the target exists write-content normally needs to be
                // checked, however, we're deleting the node beforehand and
                // creating a new one after, so this is handled by the
                // beforeUnbind event.
                //
                // The creation of the new node is handled by the beforeBind
                // event.
                //
                // If MOVE is used beforeUnbind will also be used to check if
                // the sourcenode can be deleted.
                $this->checkPrivileges($uri,'{DAV:}read',self::R_RECURSIVE);

                break;

        }

    }

    /**
     * Triggered before a new node is created.
     *
     * This allows us to check permissions for any operation that creates a
     * new node, such as PUT, MKCOL, MKCALENDAR, LOCK, COPY and MOVE.
     *
     * @param string $uri
     * @return void
     */
    public function beforeBind($uri) {

        list($parentUri,$nodeName) = DAV\URLUtil::splitPath($uri);
        $this->checkPrivileges($parentUri,'{DAV:}bind');

    }

    /**
     * Triggered before a node is deleted
     *
     * This allows us to check permissions for any operation that will delete
     * an existing node.
     *
     * @param string $uri
     * @return void
     */
    public function beforeUnbind($uri) {

        list($parentUri,$nodeName) = DAV\URLUtil::splitPath($uri);
        $this->checkPrivileges($parentUri,'{DAV:}unbind',self::R_RECURSIVEPARENTS);

    }

    /**
     * Triggered before a node is unlocked.
     *
     * @param string $uri
     * @param DAV\Locks\LockInfo $lock
     * @TODO: not yet implemented
     * @return void
     */
    public function beforeUnlock($uri, DAV\Locks\LockInfo $lock) {


    }

    /**
     * Triggered before properties are looked up in specific nodes.
     *
     * @param string $uri
     * @param DAV\INode $node
     * @param array $requestedProperties
     * @param array $returnedProperties
     * @TODO really should be broken into multiple methods, or even a class.
     * @return bool
     */
    public function beforeGetProperties($uri, DAV\INode $node, &$requestedProperties, &$returnedProperties) {

        // Checking the read permission
        if (!$this->checkPrivileges($uri,'{DAV:}read',self::R_PARENT,false)) {

            // User is not allowed to read properties
            if ($this->hideNodesFromListings) {
                return false;
            }

            // Marking all requested properties as '403'.
            foreach($requestedProperties as $key=>$requestedProperty) {
                unset($requestedProperties[$key]);
                $returnedProperties[403][$requestedProperty] = null;
            }
            return;

        }

        /* Adding principal properties */
        if ($node instanceof IPrincipal) {

            if (false !== ($index = array_search('{DAV:}alternate-URI-set', $requestedProperties))) {

                unset($requestedProperties[$index]);
                $returnedProperties[200]['{DAV:}alternate-URI-set'] = new DAV\Property\HrefList($node->getAlternateUriSet());

            }
            if (false !== ($index = array_search('{DAV:}principal-URL', $requestedProperties))) {

                unset($requestedProperties[$index]);
                $returnedProperties[200]['{DAV:}principal-URL'] = new DAV\Property\Href($node->getPrincipalUrl() . '/');

            }
            if (false !== ($index = array_search('{DAV:}group-member-set', $requestedProperties))) {

                unset($requestedProperties[$index]);
                $returnedProperties[200]['{DAV:}group-member-set'] = new DAV\Property\HrefList($node->getGroupMemberSet());

            }
            if (false !== ($index = array_search('{DAV:}group-membership', $requestedProperties))) {

                unset($requestedProperties[$index]);
                $returnedProperties[200]['{DAV:}group-membership'] = new DAV\Property\HrefList($node->getGroupMembership());

            }

            if (false !== ($index = array_search('{DAV:}displayname', $requestedProperties))) {

                $returnedProperties[200]['{DAV:}displayname'] = $node->getDisplayName();

            }

        }
        if (false !== ($index = array_search('{DAV:}principal-collection-set', $requestedProperties))) {

            unset($requestedProperties[$index]);
            $val = $this->principalCollectionSet;
            // Ensuring all collections end with a slash
            foreach($val as $k=>$v) $val[$k] = $v . '/';
            $returnedProperties[200]['{DAV:}principal-collection-set'] = new DAV\Property\HrefList($val);

        }
        if (false !== ($index = array_search('{DAV:}current-user-principal', $requestedProperties))) {

            unset($requestedProperties[$index]);
            if ($url = $this->getCurrentUserPrincipal()) {
                $returnedProperties[200]['{DAV:}current-user-principal'] = new Property\Principal(Property\Principal::HREF, $url . '/');
            } else {
                $returnedProperties[200]['{DAV:}current-user-principal'] = new Property\Principal(Property\Principal::UNAUTHENTICATED);
            }

        }
        if (false !== ($index = array_search('{DAV:}supported-privilege-set', $requestedProperties))) {

            unset($requestedProperties[$index]);
            $returnedProperties[200]['{DAV:}supported-privilege-set'] = new Property\SupportedPrivilegeSet($this->getSupportedPrivilegeSet($node));

        }
        if (false !== ($index = array_search('{DAV:}current-user-privilege-set', $requestedProperties))) {

            if (!$this->checkPrivileges($uri, '{DAV:}read-current-user-privilege-set', self::R_PARENT, false)) {
                $returnedProperties[403]['{DAV:}current-user-privilege-set'] = null;
                unset($requestedProperties[$index]);
            } else {
                $val = $this->getCurrentUserPrivilegeSet($node);
                if (!is_null($val)) {
                    unset($requestedProperties[$index]);
                    $returnedProperties[200]['{DAV:}current-user-privilege-set'] = new Property\CurrentUserPrivilegeSet($val);
                }
            }

        }

        /* The ACL property contains all the permissions */
        if (false !== ($index = array_search('{DAV:}acl', $requestedProperties))) {

            if (!$this->checkPrivileges($uri, '{DAV:}read-acl', self::R_PARENT, false)) {

                unset($requestedProperties[$index]);
                $returnedProperties[403]['{DAV:}acl'] = null;

            } else {

                $acl = $this->getACL($node);
                if (!is_null($acl)) {
                    unset($requestedProperties[$index]);
                    $returnedProperties[200]['{DAV:}acl'] = new Property\Acl($this->getACL($node));
                }

            }

        }

        /* The acl-restrictions property contains information on how privileges
         * must behave.
         */
        if (false !== ($index = array_search('{DAV:}acl-restrictions', $requestedProperties))) {
            unset($requestedProperties[$index]);
            $returnedProperties[200]['{DAV:}acl-restrictions'] = new Property\AclRestrictions();
        }

        /* Adding ACL properties */
        if ($node instanceof IACL) {

            if (false !== ($index = array_search('{DAV:}owner', $requestedProperties))) {

                unset($requestedProperties[$index]);
                $returnedProperties[200]['{DAV:}owner'] = new DAV\Property\Href($node->getOwner() . '/');

            }

        }

    }

    /**
     * This method intercepts PROPPATCH methods and make sure the
     * group-member-set is updated correctly.
     *
     * @param array $propertyDelta
     * @param array $result
     * @param DAV\INode $node
     * @return bool
     */
    public function updateProperties(&$propertyDelta, &$result, DAV\INode $node) {

        if (!array_key_exists('{DAV:}group-member-set', $propertyDelta))
            return;

        if (is_null($propertyDelta['{DAV:}group-member-set'])) {
            $memberSet = array();
        } elseif ($propertyDelta['{DAV:}group-member-set'] instanceof DAV\Property\HrefList) {
            $memberSet = array_map(
                array($this->server,'calculateUri'),
                $propertyDelta['{DAV:}group-member-set']->getHrefs()
            );
        } else {
            throw new DAV\Exception('The group-member-set property MUST be an instance of Sabre\DAV\Property\HrefList or null');
        }

        if (!($node instanceof IPrincipal)) {
            $result[403]['{DAV:}group-member-set'] = null;
            unset($propertyDelta['{DAV:}group-member-set']);

            // Returning false will stop the updateProperties process
            return false;
        }

        $node->setGroupMemberSet($memberSet);
        // We must also clear our cache, just in case

        $this->principalMembershipCache = array();

        $result[200]['{DAV:}group-member-set'] = null;
        unset($propertyDelta['{DAV:}group-member-set']);

    }

    /**
     * This method handles HTTP REPORT requests
     *
     * @param string $reportName
     * @param \DOMNode $dom
     * @return bool
     */
    public function report($reportName, $dom) {

        switch($reportName) {

            case '{DAV:}principal-property-search' :
                $this->server->transactionType = 'report-principal-property-search';
                $this->principalPropertySearchReport($dom);
                return false;
            case '{DAV:}principal-search-property-set' :
                $this->server->transactionType = 'report-principal-search-property-set';
                $this->principalSearchPropertySetReport($dom);
                return false;
            case '{DAV:}expand-property' :
                $this->server->transactionType = 'report-expand-property';
                $this->expandPropertyReport($dom);
                return false;

        }

    }

    /**
     * This event is triggered for any HTTP method that is not known by the
     * webserver.
     *
     * @param string $method
     * @param string $uri
     * @return bool
     */
    public function unknownMethod($method, $uri) {

        if ($method!=='ACL') return;

        $this->httpACL($uri);
        return false;

    }

    /**
     * This method is responsible for handling the 'ACL' event.
     *
     * @param string $uri
     * @return void
     */
    public function httpACL($uri) {

        $body = $this->server->httpRequest->getBody(true);
        $dom = DAV\XMLUtil::loadDOMDocument($body);

        $newAcl =
            Property\Acl::unserialize($dom->firstChild, $this->server->propertyMap)
            ->getPrivileges();

        // Normalizing urls
        foreach($newAcl as $k=>$newAce) {
            $newAcl[$k]['principal'] = $this->server->calculateUri($newAce['principal']);
        }

        $node = $this->server->tree->getNodeForPath($uri);

        if (!($node instanceof IACL)) {
            throw new DAV\Exception\MethodNotAllowed('This node does not support the ACL method');
        }

        $oldAcl = $this->getACL($node);

        $supportedPrivileges = $this->getFlatPrivilegeSet($node);

        /* Checking if protected principals from the existing principal set are
           not overwritten. */
        foreach($oldAcl as $oldAce) {

            if (!isset($oldAce['protected']) || !$oldAce['protected']) continue;

            $found = false;
            foreach($newAcl as $newAce) {
                if (
                    $newAce['privilege'] === $oldAce['privilege'] &&
                    $newAce['principal'] === $oldAce['principal'] &&
                    $newAce['protected']
                )
                $found = true;
            }

            if (!$found)
                throw new Exception\AceConflict('This resource contained a protected {DAV:}ace, but this privilege did not occur in the ACL request');

        }

        foreach($newAcl as $newAce) {

            // Do we recognize the privilege
            if (!isset($supportedPrivileges[$newAce['privilege']])) {
                throw new Exception\NotSupportedPrivilege('The privilege you specified (' . $newAce['privilege'] . ') is not recognized by this server');
            }

            if ($supportedPrivileges[$newAce['privilege']]['abstract']) {
                throw new Exception\NoAbstract('The privilege you specified (' . $newAce['privilege'] . ') is an abstract privilege');
            }

            // Looking up the principal
            try {
                $principal = $this->server->tree->getNodeForPath($newAce['principal']);
            } catch (DAV\Exception\NotFound $e) {
                throw new Exception\NotRecognizedPrincipal('The specified principal (' . $newAce['principal'] . ') does not exist');
            }
            if (!($principal instanceof IPrincipal)) {
                throw new Exception\NotRecognizedPrincipal('The specified uri (' . $newAce['principal'] . ') is not a principal');
            }

        }
        $node->setACL($newAcl);

    }

    /* }}} */

    /* Reports {{{ */

    /**
     * The expand-property report is defined in RFC3253 section 3-8.
     *
     * This report is very similar to a standard PROPFIND. The difference is
     * that it has the additional ability to look at properties containing a
     * {DAV:}href element, follow that property and grab additional elements
     * there.
     *
     * Other rfc's, such as ACL rely on this report, so it made sense to put
     * it in this plugin.
     *
     * @param \DOMElement $dom
     * @return void
     */
    protected function expandPropertyReport($dom) {

        $requestedProperties = $this->parseExpandPropertyReportRequest($dom->firstChild->firstChild);
        $depth = $this->server->getHTTPDepth(0);
        $requestUri = $this->server->getRequestUri();

        $result = $this->expandProperties($requestUri,$requestedProperties,$depth);

        $dom = new \DOMDocument('1.0','utf-8');
        $dom->formatOutput = true;
        $multiStatus = $dom->createElement('d:multistatus');
        $dom->appendChild($multiStatus);

        // Adding in default namespaces
        foreach($this->server->xmlNamespaces as $namespace=>$prefix) {

            $multiStatus->setAttribute('xmlns:' . $prefix,$namespace);

        }

        foreach($result as $response) {
            $response->serialize($this->server, $multiStatus);
        }

        $xml = $dom->saveXML();
        $this->server->httpResponse->setHeader('Content-Type','application/xml; charset=utf-8');
        $this->server->httpResponse->sendStatus(207);
        $this->server->httpResponse->sendBody($xml);

    }

    /**
     * This method is used by expandPropertyReport to parse
     * out the entire HTTP request.
     *
     * @param \DOMElement $node
     * @return array
     */
    protected function parseExpandPropertyReportRequest($node) {

        $requestedProperties = array();
        do {

            if (DAV\XMLUtil::toClarkNotation($node)!=='{DAV:}property') continue;

            if ($node->firstChild) {

                $children = $this->parseExpandPropertyReportRequest($node->firstChild);

            } else {

                $children = array();

            }

            $namespace = $node->getAttribute('namespace');
            if (!$namespace) $namespace = 'DAV:';

            $propName = '{'.$namespace.'}' . $node->getAttribute('name');
            $requestedProperties[$propName] = $children;

        } while ($node = $node->nextSibling);

        return $requestedProperties;

    }

    /**
     * This method expands all the properties and returns
     * a list with property values
     *
     * @param array $path
     * @param array $requestedProperties the list of required properties
     * @param int $depth
     * @return array
     */
    protected function expandProperties($path, array $requestedProperties, $depth) {

        $foundProperties = $this->server->getPropertiesForPath($path, array_keys($requestedProperties), $depth);

        $result = array();

        foreach($foundProperties as $node) {

            foreach($requestedProperties as $propertyName=>$childRequestedProperties) {

                // We're only traversing if sub-properties were requested
                if(count($childRequestedProperties)===0) continue;

                // We only have to do the expansion if the property was found
                // and it contains an href element.
                if (!array_key_exists($propertyName,$node[200])) continue;

                if ($node[200][$propertyName] instanceof DAV\Property\IHref) {
                    $hrefs = array($node[200][$propertyName]->getHref());
                } elseif ($node[200][$propertyName] instanceof DAV\Property\HrefList) {
                    $hrefs = $node[200][$propertyName]->getHrefs();
                }

                $childProps = array();
                foreach($hrefs as $href) {
                    $childProps = array_merge($childProps, $this->expandProperties($href, $childRequestedProperties, 0));
                }
                $node[200][$propertyName] = new DAV\Property\ResponseList($childProps);

            }
            $result[] = new DAV\Property\Response($node['href'], $node);

        }

        return $result;

    }

    /**
     * principalSearchPropertySetReport
     *
     * This method responsible for handing the
     * {DAV:}principal-search-property-set report. This report returns a list
     * of properties the client may search on, using the
     * {DAV:}principal-property-search report.
     *
     * @param \DOMDocument $dom
     * @return void
     */
    protected function principalSearchPropertySetReport(\DOMDocument $dom) {

        $httpDepth = $this->server->getHTTPDepth(0);
        if ($httpDepth!==0) {
            throw new DAV\Exception\BadRequest('This report is only defined when Depth: 0');
        }

        if ($dom->firstChild->hasChildNodes())
            throw new DAV\Exception\BadRequest('The principal-search-property-set report element is not allowed to have child elements');

        $dom = new \DOMDocument('1.0','utf-8');
        $dom->formatOutput = true;
        $root = $dom->createElement('d:principal-search-property-set');
        $dom->appendChild($root);
        // Adding in default namespaces
        foreach($this->server->xmlNamespaces as $namespace=>$prefix) {

            $root->setAttribute('xmlns:' . $prefix,$namespace);

        }

        $nsList = $this->server->xmlNamespaces;

        foreach($this->principalSearchPropertySet as $propertyName=>$description) {

            $psp = $dom->createElement('d:principal-search-property');
            $root->appendChild($psp);

            $prop = $dom->createElement('d:prop');
            $psp->appendChild($prop);

            $propName = null;
            preg_match('/^{([^}]*)}(.*)$/',$propertyName,$propName);

            $currentProperty = $dom->createElement($nsList[$propName[1]] . ':' . $propName[2]);
            $prop->appendChild($currentProperty);

            $descriptionElem = $dom->createElement('d:description');
            $descriptionElem->setAttribute('xml:lang','en');
            $descriptionElem->appendChild($dom->createTextNode($description));
            $psp->appendChild($descriptionElem);


        }

        $this->server->httpResponse->setHeader('Content-Type','application/xml; charset=utf-8');
        $this->server->httpResponse->sendStatus(200);
        $this->server->httpResponse->sendBody($dom->saveXML());

    }

    /**
     * principalPropertySearchReport
     *
     * This method is responsible for handing the
     * {DAV:}principal-property-search report. This report can be used for
     * clients to search for groups of principals, based on the value of one
     * or more properties.
     *
     * @param \DOMDocument $dom
     * @return void
     */
    protected function principalPropertySearchReport(\DOMDocument $dom) {

        list($searchProperties, $requestedProperties, $applyToPrincipalCollectionSet) = $this->parsePrincipalPropertySearchReportRequest($dom);

        $uri = null;
        if (!$applyToPrincipalCollectionSet) {
            $uri = $this->server->getRequestUri();
        }
        $result = $this->principalSearch($searchProperties, $requestedProperties, $uri);

        $prefer = $this->server->getHTTPPRefer();

        $this->server->httpResponse->sendStatus(207);
        $this->server->httpResponse->setHeader('Content-Type','application/xml; charset=utf-8');
        $this->server->httpResponse->setHeader('Vary','Brief,Prefer');
        $this->server->httpResponse->sendBody($this->server->generateMultiStatus($result, $prefer['return-minimal']));

    }

    /**
     * parsePrincipalPropertySearchReportRequest
     *
     * This method parses the request body from a
     * {DAV:}principal-property-search report.
     *
     * This method returns an array with two elements:
     *  1. an array with properties to search on, and their values
     *  2. a list of propertyvalues that should be returned for the request.
     *
     * @param \DOMDocument $dom
     * @return array
     */
    protected function parsePrincipalPropertySearchReportRequest($dom) {

        $httpDepth = $this->server->getHTTPDepth(0);
        if ($httpDepth!==0) {
            throw new DAV\Exception\BadRequest('This report is only defined when Depth: 0');
        }

        $searchProperties = array();

        $applyToPrincipalCollectionSet = false;

        // Parsing the search request
        foreach($dom->firstChild->childNodes as $searchNode) {

            if (DAV\XMLUtil::toClarkNotation($searchNode) == '{DAV:}apply-to-principal-collection-set') {
                $applyToPrincipalCollectionSet = true;
            }

            if (DAV\XMLUtil::toClarkNotation($searchNode)!=='{DAV:}property-search')
                continue;

            $propertyName = null;
            $propertyValue = null;

            foreach($searchNode->childNodes as $childNode) {

                switch(DAV\XMLUtil::toClarkNotation($childNode)) {

                    case '{DAV:}prop' :
                        $property = DAV\XMLUtil::parseProperties($searchNode);
                        reset($property);
                        $propertyName = key($property);
                        break;

                    case '{DAV:}match' :
                        $propertyValue = $childNode->textContent;
                        break;

                }


            }

            if (is_null($propertyName) || is_null($propertyValue))
                throw new DAV\Exception\BadRequest('Invalid search request. propertyname: ' . $propertyName . '. propertvvalue: ' . $propertyValue);

            $searchProperties[$propertyName] = $propertyValue;

        }

        return array($searchProperties, array_keys(DAV\XMLUtil::parseProperties($dom->firstChild)), $applyToPrincipalCollectionSet);

    }


    /* }}} */

}
Back to Top