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19 package org.apache.hadoop.hbase.security.access;
20
21 import java.io.ByteArrayInputStream;
22 import java.io.DataInput;
23 import java.io.DataInputStream;
24 import java.io.IOException;
25 import java.util.ArrayList;
26 import java.util.Arrays;
27 import java.util.Iterator;
28 import java.util.List;
29 import java.util.Map;
30 import java.util.Set;
31 import java.util.TreeMap;
32 import java.util.TreeSet;
33
34 import org.apache.commons.logging.Log;
35 import org.apache.commons.logging.LogFactory;
36 import org.apache.hadoop.hbase.classification.InterfaceAudience;
37 import org.apache.hadoop.conf.Configuration;
38 import org.apache.hadoop.hbase.AuthUtil;
39 import org.apache.hadoop.hbase.Cell;
40 import org.apache.hadoop.hbase.CellUtil;
41 import org.apache.hadoop.hbase.HColumnDescriptor;
42 import org.apache.hadoop.hbase.HConstants;
43 import org.apache.hadoop.hbase.HTableDescriptor;
44 import org.apache.hadoop.hbase.NamespaceDescriptor;
45 import org.apache.hadoop.hbase.TableName;
46 import org.apache.hadoop.hbase.Tag;
47 import org.apache.hadoop.hbase.TagType;
48 import org.apache.hadoop.hbase.client.Delete;
49 import org.apache.hadoop.hbase.client.Get;
50 import org.apache.hadoop.hbase.client.HTable;
51 import org.apache.hadoop.hbase.client.Put;
52 import org.apache.hadoop.hbase.client.Result;
53 import org.apache.hadoop.hbase.client.ResultScanner;
54 import org.apache.hadoop.hbase.client.Scan;
55 import org.apache.hadoop.hbase.exceptions.DeserializationException;
56 import org.apache.hadoop.hbase.filter.CompareFilter.CompareOp;
57 import org.apache.hadoop.hbase.filter.QualifierFilter;
58 import org.apache.hadoop.hbase.filter.RegexStringComparator;
59 import org.apache.hadoop.hbase.master.MasterServices;
60 import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
61 import org.apache.hadoop.hbase.protobuf.generated.AccessControlProtos;
62 import org.apache.hadoop.hbase.regionserver.BloomType;
63 import org.apache.hadoop.hbase.regionserver.HRegion;
64 import org.apache.hadoop.hbase.regionserver.InternalScanner;
65 import org.apache.hadoop.hbase.security.User;
66 import org.apache.hadoop.hbase.util.Bytes;
67 import org.apache.hadoop.hbase.util.Pair;
68 import org.apache.hadoop.io.Text;
69
70 import com.google.common.collect.ArrayListMultimap;
71 import com.google.common.collect.ListMultimap;
72 import com.google.common.collect.Lists;
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97 @InterfaceAudience.Private
98 public class AccessControlLists {
99
100 public static final TableName ACL_TABLE_NAME =
101 TableName.valueOf(NamespaceDescriptor.SYSTEM_NAMESPACE_NAME_STR, "acl");
102 public static final byte[] ACL_GLOBAL_NAME = ACL_TABLE_NAME.getName();
103
104 public static final String ACL_LIST_FAMILY_STR = "l";
105 public static final byte[] ACL_LIST_FAMILY = Bytes.toBytes(ACL_LIST_FAMILY_STR);
106
107 public static final byte ACL_TAG_TYPE = TagType.ACL_TAG_TYPE;
108
109 public static final char NAMESPACE_PREFIX = '@';
110
111
112
113
114 public static final char ACL_KEY_DELIMITER = ',';
115
116 private static Log LOG = LogFactory.getLog(AccessControlLists.class);
117
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122
123 static void createACLTable(MasterServices master) throws IOException {
124 HTableDescriptor desc = new HTableDescriptor(ACL_TABLE_NAME);
125 desc.addFamily(new HColumnDescriptor(ACL_LIST_FAMILY)
126 .setMaxVersions(1)
127 .setInMemory(true)
128 .setBlockCacheEnabled(true)
129 .setBlocksize(8 * 1024)
130 .setBloomFilterType(BloomType.NONE)
131 .setScope(HConstants.REPLICATION_SCOPE_LOCAL));
132 master.createTable(desc, null);
133 }
134
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140
141 static void addUserPermission(Configuration conf, UserPermission userPerm)
142 throws IOException {
143 Permission.Action[] actions = userPerm.getActions();
144 byte[] rowKey = userPermissionRowKey(userPerm);
145 Put p = new Put(rowKey);
146 byte[] key = userPermissionKey(userPerm);
147
148 if ((actions == null) || (actions.length == 0)) {
149 String msg = "No actions associated with user '" + Bytes.toString(userPerm.getUser()) + "'";
150 LOG.warn(msg);
151 throw new IOException(msg);
152 }
153
154 byte[] value = new byte[actions.length];
155 for (int i = 0; i < actions.length; i++) {
156 value[i] = actions[i].code();
157 }
158 p.addImmutable(ACL_LIST_FAMILY, key, value);
159 if (LOG.isDebugEnabled()) {
160 LOG.debug("Writing permission with rowKey "+
161 Bytes.toString(rowKey)+" "+
162 Bytes.toString(key)+": "+Bytes.toStringBinary(value)
163 );
164 }
165 HTable acls = null;
166 try {
167 acls = new HTable(conf, ACL_TABLE_NAME);
168 acls.put(p);
169 } finally {
170 if (acls != null) acls.close();
171 }
172 }
173
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186
187 static void removeUserPermission(Configuration conf, UserPermission userPerm)
188 throws IOException {
189 Delete d = new Delete(userPermissionRowKey(userPerm));
190 byte[] key = userPermissionKey(userPerm);
191
192 if (LOG.isDebugEnabled()) {
193 LOG.debug("Removing permission "+ userPerm.toString());
194 }
195 d.deleteColumns(ACL_LIST_FAMILY, key);
196 HTable acls = null;
197 try {
198 acls = new HTable(conf, ACL_TABLE_NAME);
199 acls.delete(d);
200 } finally {
201 if (acls != null) acls.close();
202 }
203 }
204
205
206
207
208 static void removeTablePermissions(Configuration conf, TableName tableName)
209 throws IOException{
210 Delete d = new Delete(tableName.getName());
211
212 if (LOG.isDebugEnabled()) {
213 LOG.debug("Removing permissions of removed table "+ tableName);
214 }
215
216 HTable acls = null;
217 try {
218 acls = new HTable(conf, ACL_TABLE_NAME);
219 acls.delete(d);
220 } finally {
221 if (acls != null) acls.close();
222 }
223 }
224
225
226
227
228 static void removeNamespacePermissions(Configuration conf, String namespace)
229 throws IOException{
230 Delete d = new Delete(Bytes.toBytes(toNamespaceEntry(namespace)));
231
232 if (LOG.isDebugEnabled()) {
233 LOG.debug("Removing permissions of removed namespace "+ namespace);
234 }
235
236 HTable acls = null;
237 try {
238 acls = new HTable(conf, ACL_TABLE_NAME);
239 acls.delete(d);
240 } finally {
241 if (acls != null) acls.close();
242 }
243 }
244
245
246
247
248 static void removeTablePermissions(Configuration conf, TableName tableName, byte[] column)
249 throws IOException{
250
251 if (LOG.isDebugEnabled()) {
252 LOG.debug("Removing permissions of removed column " + Bytes.toString(column) +
253 " from table "+ tableName);
254 }
255
256 HTable acls = null;
257 try {
258 acls = new HTable(conf, ACL_TABLE_NAME);
259
260 Scan scan = new Scan();
261 scan.addFamily(ACL_LIST_FAMILY);
262
263 String columnName = Bytes.toString(column);
264 scan.setFilter(new QualifierFilter(CompareOp.EQUAL, new RegexStringComparator(
265 String.format("(%s%s%s)|(%s%s)$",
266 ACL_KEY_DELIMITER, columnName, ACL_KEY_DELIMITER,
267 ACL_KEY_DELIMITER, columnName))));
268
269 Set<byte[]> qualifierSet = new TreeSet<byte[]>(Bytes.BYTES_COMPARATOR);
270 ResultScanner scanner = acls.getScanner(scan);
271 try {
272 for (Result res : scanner) {
273 for (byte[] q : res.getFamilyMap(ACL_LIST_FAMILY).navigableKeySet()) {
274 qualifierSet.add(q);
275 }
276 }
277 } finally {
278 scanner.close();
279 }
280
281 if (qualifierSet.size() > 0) {
282 Delete d = new Delete(tableName.getName());
283 for (byte[] qualifier : qualifierSet) {
284 d.deleteColumns(ACL_LIST_FAMILY, qualifier);
285 }
286 acls.delete(d);
287 }
288 } finally {
289 if (acls != null) acls.close();
290 }
291 }
292
293 static byte[] userPermissionRowKey(UserPermission userPerm) {
294 byte[] row;
295 if(userPerm.hasNamespace()) {
296 row = Bytes.toBytes(toNamespaceEntry(userPerm.getNamespace()));
297 } else if(userPerm.isGlobal()) {
298 row = ACL_GLOBAL_NAME;
299 } else {
300 row = userPerm.getTableName().getName();
301 }
302 return row;
303 }
304
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311 static byte[] userPermissionKey(UserPermission userPerm) {
312 byte[] qualifier = userPerm.getQualifier();
313 byte[] family = userPerm.getFamily();
314 byte[] key = userPerm.getUser();
315
316 if (family != null && family.length > 0) {
317 key = Bytes.add(key, Bytes.add(new byte[]{ACL_KEY_DELIMITER}, family));
318 if (qualifier != null && qualifier.length > 0) {
319 key = Bytes.add(key, Bytes.add(new byte[]{ACL_KEY_DELIMITER}, qualifier));
320 }
321 }
322
323 return key;
324 }
325
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329
330 static boolean isAclRegion(HRegion region) {
331 return ACL_TABLE_NAME.equals(region.getTableDesc().getTableName());
332 }
333
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337 static boolean isAclTable(HTableDescriptor desc) {
338 return ACL_TABLE_NAME.equals(desc.getTableName());
339 }
340
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348
349 static Map<byte[], ListMultimap<String,TablePermission>> loadAll(
350 HRegion aclRegion)
351 throws IOException {
352
353 if (!isAclRegion(aclRegion)) {
354 throw new IOException("Can only load permissions from "+ACL_TABLE_NAME);
355 }
356
357 Map<byte[], ListMultimap<String, TablePermission>> allPerms =
358 new TreeMap<byte[], ListMultimap<String, TablePermission>>(Bytes.BYTES_RAWCOMPARATOR);
359
360
361
362 Scan scan = new Scan();
363 scan.addFamily(ACL_LIST_FAMILY);
364
365 InternalScanner iScanner = null;
366 try {
367 iScanner = aclRegion.getScanner(scan);
368
369 while (true) {
370 List<Cell> row = new ArrayList<Cell>();
371
372 boolean hasNext = iScanner.next(row);
373 ListMultimap<String,TablePermission> perms = ArrayListMultimap.create();
374 byte[] entry = null;
375 for (Cell kv : row) {
376 if (entry == null) {
377 entry = CellUtil.cloneRow(kv);
378 }
379 Pair<String,TablePermission> permissionsOfUserOnTable =
380 parsePermissionRecord(entry, kv);
381 if (permissionsOfUserOnTable != null) {
382 String username = permissionsOfUserOnTable.getFirst();
383 TablePermission permissions = permissionsOfUserOnTable.getSecond();
384 perms.put(username, permissions);
385 }
386 }
387 if (entry != null) {
388 allPerms.put(entry, perms);
389 }
390 if (!hasNext) {
391 break;
392 }
393 }
394 } finally {
395 if (iScanner != null) {
396 iScanner.close();
397 }
398 }
399
400 return allPerms;
401 }
402
403
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406
407 static Map<byte[], ListMultimap<String,TablePermission>> loadAll(
408 Configuration conf) throws IOException {
409 Map<byte[], ListMultimap<String,TablePermission>> allPerms =
410 new TreeMap<byte[], ListMultimap<String,TablePermission>>(Bytes.BYTES_RAWCOMPARATOR);
411
412
413
414 Scan scan = new Scan();
415 scan.addFamily(ACL_LIST_FAMILY);
416
417 HTable acls = null;
418 ResultScanner scanner = null;
419 try {
420 acls = new HTable(conf, ACL_TABLE_NAME);
421 scanner = acls.getScanner(scan);
422 for (Result row : scanner) {
423 ListMultimap<String,TablePermission> resultPerms =
424 parsePermissions(row.getRow(), row);
425 allPerms.put(row.getRow(), resultPerms);
426 }
427 } finally {
428 if (scanner != null) scanner.close();
429 if (acls != null) acls.close();
430 }
431
432 return allPerms;
433 }
434
435 static ListMultimap<String, TablePermission> getTablePermissions(Configuration conf,
436 TableName tableName) throws IOException {
437 return getPermissions(conf, tableName != null ? tableName.getName() : null);
438 }
439
440 static ListMultimap<String, TablePermission> getNamespacePermissions(Configuration conf,
441 String namespace) throws IOException {
442 return getPermissions(conf, Bytes.toBytes(toNamespaceEntry(namespace)));
443 }
444
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452
453
454 static ListMultimap<String, TablePermission> getPermissions(Configuration conf,
455 byte[] entryName) throws IOException {
456 if (entryName == null) entryName = ACL_GLOBAL_NAME;
457
458
459 ListMultimap<String, TablePermission> perms = ArrayListMultimap.create();
460 HTable acls = null;
461 try {
462 acls = new HTable(conf, ACL_TABLE_NAME);
463 Get get = new Get(entryName);
464 get.addFamily(ACL_LIST_FAMILY);
465 Result row = acls.get(get);
466 if (!row.isEmpty()) {
467 perms = parsePermissions(entryName, row);
468 } else {
469 LOG.info("No permissions found in " + ACL_TABLE_NAME + " for acl entry "
470 + Bytes.toString(entryName));
471 }
472 } finally {
473 if (acls != null) acls.close();
474 }
475
476 return perms;
477 }
478
479
480
481
482
483 static List<UserPermission> getUserTablePermissions(
484 Configuration conf, TableName tableName) throws IOException {
485 return getUserPermissions(conf, tableName == null ? null : tableName.getName());
486 }
487
488 static List<UserPermission> getUserNamespacePermissions(
489 Configuration conf, String namespace) throws IOException {
490 return getUserPermissions(conf, Bytes.toBytes(toNamespaceEntry(namespace)));
491 }
492
493 static List<UserPermission> getUserPermissions(
494 Configuration conf, byte[] entryName)
495 throws IOException {
496 ListMultimap<String,TablePermission> allPerms = getPermissions(
497 conf, entryName);
498
499 List<UserPermission> perms = new ArrayList<UserPermission>();
500
501 for (Map.Entry<String, TablePermission> entry : allPerms.entries()) {
502 UserPermission up = new UserPermission(Bytes.toBytes(entry.getKey()),
503 entry.getValue().getTableName(), entry.getValue().getFamily(),
504 entry.getValue().getQualifier(), entry.getValue().getActions());
505 perms.add(up);
506 }
507 return perms;
508 }
509
510 private static ListMultimap<String, TablePermission> parsePermissions(
511 byte[] entryName, Result result) {
512 ListMultimap<String, TablePermission> perms = ArrayListMultimap.create();
513 if (result != null && result.size() > 0) {
514 for (Cell kv : result.rawCells()) {
515
516 Pair<String,TablePermission> permissionsOfUserOnTable =
517 parsePermissionRecord(entryName, kv);
518
519 if (permissionsOfUserOnTable != null) {
520 String username = permissionsOfUserOnTable.getFirst();
521 TablePermission permissions = permissionsOfUserOnTable.getSecond();
522 perms.put(username, permissions);
523 }
524 }
525 }
526 return perms;
527 }
528
529 private static Pair<String, TablePermission> parsePermissionRecord(
530 byte[] entryName, Cell kv) {
531
532 byte[] family = CellUtil.cloneFamily(kv);
533
534 if (!Bytes.equals(family, ACL_LIST_FAMILY)) {
535 return null;
536 }
537
538 byte[] key = CellUtil.cloneQualifier(kv);
539 byte[] value = CellUtil.cloneValue(kv);
540 if (LOG.isDebugEnabled()) {
541 LOG.debug("Read acl: kv ["+
542 Bytes.toStringBinary(key)+": "+
543 Bytes.toStringBinary(value)+"]");
544 }
545
546
547
548 String username = Bytes.toString(key);
549
550
551 if(isNamespaceEntry(entryName)) {
552 return new Pair<String, TablePermission>(username,
553 new TablePermission(Bytes.toString(fromNamespaceEntry(entryName)), value));
554 }
555
556
557
558 int idx = username.indexOf(ACL_KEY_DELIMITER);
559 byte[] permFamily = null;
560 byte[] permQualifier = null;
561 if (idx > 0 && idx < username.length()-1) {
562 String remainder = username.substring(idx+1);
563 username = username.substring(0, idx);
564 idx = remainder.indexOf(ACL_KEY_DELIMITER);
565 if (idx > 0 && idx < remainder.length()-1) {
566 permFamily = Bytes.toBytes(remainder.substring(0, idx));
567 permQualifier = Bytes.toBytes(remainder.substring(idx+1));
568 } else {
569 permFamily = Bytes.toBytes(remainder);
570 }
571 }
572
573 return new Pair<String,TablePermission>(username,
574 new TablePermission(TableName.valueOf(entryName), permFamily, permQualifier, value));
575 }
576
577
578
579
580
581
582
583 public static byte[] writePermissionsAsBytes(ListMultimap<String, TablePermission> perms,
584 Configuration conf) {
585 return ProtobufUtil.prependPBMagic(ProtobufUtil.toUserTablePermissions(perms).toByteArray());
586 }
587
588
589
590
591
592 public static ListMultimap<String, TablePermission> readPermissions(byte[] data,
593 Configuration conf)
594 throws DeserializationException {
595 if (ProtobufUtil.isPBMagicPrefix(data)) {
596 int pblen = ProtobufUtil.lengthOfPBMagic();
597 try {
598 AccessControlProtos.UsersAndPermissions.Builder builder =
599 AccessControlProtos.UsersAndPermissions.newBuilder();
600 ProtobufUtil.mergeFrom(builder, data, pblen, data.length - pblen);
601 return ProtobufUtil.toUserTablePermissions(builder.build());
602 } catch (IOException e) {
603 throw new DeserializationException(e);
604 }
605 } else {
606 ListMultimap<String,TablePermission> perms = ArrayListMultimap.create();
607 try {
608 DataInput in = new DataInputStream(new ByteArrayInputStream(data));
609 int length = in.readInt();
610 for (int i=0; i<length; i++) {
611 String user = Text.readString(in);
612 List<TablePermission> userPerms =
613 (List)HbaseObjectWritableFor96Migration.readObject(in, conf);
614 perms.putAll(user, userPerms);
615 }
616 } catch (IOException e) {
617 throw new DeserializationException(e);
618 }
619 return perms;
620 }
621 }
622
623 public static boolean isNamespaceEntry(String entryName) {
624 return entryName.charAt(0) == NAMESPACE_PREFIX;
625 }
626
627 public static boolean isNamespaceEntry(byte[] entryName) {
628 return entryName[0] == NAMESPACE_PREFIX;
629 }
630
631 public static String toNamespaceEntry(String namespace) {
632 return NAMESPACE_PREFIX + namespace;
633 }
634
635 public static String fromNamespaceEntry(String namespace) {
636 if(namespace.charAt(0) != NAMESPACE_PREFIX)
637 throw new IllegalArgumentException("Argument is not a valid namespace entry");
638 return namespace.substring(1);
639 }
640
641 public static byte[] toNamespaceEntry(byte[] namespace) {
642 byte[] ret = new byte[namespace.length+1];
643 ret[0] = NAMESPACE_PREFIX;
644 System.arraycopy(namespace, 0, ret, 1, namespace.length);
645 return ret;
646 }
647
648 public static byte[] fromNamespaceEntry(byte[] namespace) {
649 if(namespace[0] != NAMESPACE_PREFIX) {
650 throw new IllegalArgumentException("Argument is not a valid namespace entry: " +
651 Bytes.toString(namespace));
652 }
653 return Arrays.copyOfRange(namespace, 1, namespace.length);
654 }
655
656 public static List<Permission> getCellPermissionsForUser(User user, Cell cell)
657 throws IOException {
658
659 if (cell.getTagsLengthUnsigned() == 0) {
660 return null;
661 }
662 List<Permission> results = Lists.newArrayList();
663 Iterator<Tag> tagsIterator = CellUtil.tagsIterator(cell.getTagsArray(), cell.getTagsOffset(),
664 cell.getTagsLengthUnsigned());
665 while (tagsIterator.hasNext()) {
666 Tag tag = tagsIterator.next();
667 if (tag.getType() == ACL_TAG_TYPE) {
668
669
670
671 AccessControlProtos.UsersAndPermissions.Builder builder =
672 AccessControlProtos.UsersAndPermissions.newBuilder();
673 ProtobufUtil.mergeFrom(builder, tag.getBuffer(), tag.getTagOffset(), tag.getTagLength());
674 ListMultimap<String,Permission> kvPerms =
675 ProtobufUtil.toUsersAndPermissions(builder.build());
676
677 List<Permission> userPerms = kvPerms.get(user.getShortName());
678 if (userPerms != null) {
679 results.addAll(userPerms);
680 }
681
682 String groupNames[] = user.getGroupNames();
683 if (groupNames != null) {
684 for (String group : groupNames) {
685 List<Permission> groupPerms = kvPerms.get(AuthUtil.toGroupEntry(group));
686 if (results != null) {
687 results.addAll(groupPerms);
688 }
689 }
690 }
691 }
692 }
693 return results;
694 }
695 }