/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.security.access;
import java.io.IOException;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.CoprocessorEnvironment;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HRegionInfo;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.ServerName;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.Increment;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.coprocessor.BaseRegionObserver;
import org.apache.hadoop.hbase.coprocessor.CoprocessorException;
import org.apache.hadoop.hbase.coprocessor.MasterCoprocessorEnvironment;
import org.apache.hadoop.hbase.coprocessor.MasterObserver;
import org.apache.hadoop.hbase.coprocessor.ObserverContext;
import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
import org.apache.hadoop.hbase.filter.CompareFilter;
import org.apache.hadoop.hbase.filter.FilterList;
import org.apache.hadoop.hbase.filter.WritableByteArrayComparable;
import org.apache.hadoop.hbase.ipc.HBaseRPC;
import org.apache.hadoop.hbase.ipc.ProtocolSignature;
import org.apache.hadoop.hbase.ipc.RequestContext;
import org.apache.hadoop.hbase.regionserver.HRegion;
import org.apache.hadoop.hbase.regionserver.InternalScanner;
import org.apache.hadoop.hbase.regionserver.RegionScanner;
import org.apache.hadoop.hbase.regionserver.wal.WALEdit;
import org.apache.hadoop.hbase.security.AccessDeniedException;
import org.apache.hadoop.hbase.security.User;
import org.apache.hadoop.hbase.util.Bytes;
import com.google.common.collect.ListMultimap;
import com.google.common.collect.Lists;
import com.google.common.collect.MapMaker;
import com.google.common.collect.Maps;
import com.google.common.collect.Sets;
/**
* Provides basic authorization checks for data access and administrative
* operations.
*
* <p>
* {@code AccessController} performs authorization checks for HBase operations
* based on:
* <ul>
* <li>the identity of the user performing the operation</li>
* <li>the scope over which the operation is performed, in increasing
* specificity: global, table, column family, or qualifier</li>
* <li>the type of action being performed (as mapped to
* {@link Permission.Action} values)</li>
* </ul>
* If the authorization check fails, an {@link AccessDeniedException}
* will be thrown for the operation.
* </p>
*
* <p>
* To perform authorization checks, {@code AccessController} relies on the
* {@link org.apache.hadoop.hbase.ipc.SecureRpcEngine} being loaded to provide
* the user identities for remote requests.
* </p>
*
* <p>
* The access control lists used for authorization can be manipulated via the
* exposed {@link AccessControllerProtocol} implementation, and the associated
* {@code grant}, {@code revoke}, and {@code user_permission} HBase shell
* commands.
* </p>
*/
public class AccessController extends BaseRegionObserver
implements MasterObserver, AccessControllerProtocol {
/**
* Represents the result of an authorization check for logging and error
* reporting.
*/
private static class AuthResult {
private final boolean allowed;
private final byte[] table;
private final byte[] family;
private final byte[] qualifier;
private final Permission.Action action;
private final String reason;
private final User user;
public AuthResult(boolean allowed, String reason, User user,
Permission.Action action, byte[] table, byte[] family, byte[] qualifier) {
this.allowed = allowed;
this.reason = reason;
this.user = user;
this.table = table;
this.family = family;
this.qualifier = qualifier;
this.action = action;
}
public boolean isAllowed() { return allowed; }
public User getUser() { return user; }
public String getReason() { return reason; }
public String toContextString() {
return "(user=" + (user != null ? user.getName() : "UNKNOWN") + ", " +
"scope=" + (table == null ? "GLOBAL" : Bytes.toString(table)) + ", " +
"family=" + (family != null ? Bytes.toString(family) : "") + ", " +
"qualifer=" + (qualifier != null ? Bytes.toString(qualifier) : "") + ", " +
"action=" + (action != null ? action.toString() : "") + ")";
}
public String toString() {
return new StringBuilder("AuthResult")
.append(toContextString()).toString();
}
public static AuthResult allow(String reason, User user,
Permission.Action action, byte[] table) {
return new AuthResult(true, reason, user, action, table, null, null);
}
public static AuthResult deny(String reason, User user,
Permission.Action action, byte[] table) {
return new AuthResult(false, reason, user, action, table, null, null);
}
public static AuthResult deny(String reason, User user,
Permission.Action action, byte[] table, byte[] family, byte[] qualifier) {
return new AuthResult(false, reason, user, action, table, family, qualifier);
}
}
public static final Log LOG = LogFactory.getLog(AccessController.class);
private static final Log AUDITLOG =
LogFactory.getLog("SecurityLogger."+AccessController.class.getName());
/**
* Version number for AccessControllerProtocol
*/
private static final long PROTOCOL_VERSION = 1L;
TableAuthManager authManager = null;
// flags if we are running on a region of the _acl_ table
boolean aclRegion = false;
// defined only for Endpoint implementation, so it can have way to
// access region services.
private RegionCoprocessorEnvironment regionEnv;
/** Mapping of scanner instances to the user who created them */
private Map<InternalScanner,String> scannerOwners =
new MapMaker().weakKeys().makeMap();
void initialize(RegionCoprocessorEnvironment e) throws IOException {
final HRegion region = e.getRegion();
Map<byte[],ListMultimap<String,TablePermission>> tables =
AccessControlLists.loadAll(region);
// For each table, write out the table's permissions to the respective
// znode for that table.
for (Map.Entry<byte[],ListMultimap<String,TablePermission>> t:
tables.entrySet()) {
byte[] table = t.getKey();
String tableName = Bytes.toString(table);
ListMultimap<String,TablePermission> perms = t.getValue();
byte[] serialized = AccessControlLists.writePermissionsAsBytes(perms,
e.getRegion().getConf());
this.authManager.getZKPermissionWatcher().writeToZookeeper(tableName,
serialized);
}
}
/**
* Writes all table ACLs for the tables in the given Map up into ZooKeeper
* znodes. This is called to synchronize ACL changes following {@code _acl_}
* table updates.
*/
void updateACL(RegionCoprocessorEnvironment e,
final Map<byte[], List<KeyValue>> familyMap) {
Set<String> tableSet = new HashSet<String>();
for (Map.Entry<byte[], List<KeyValue>> f : familyMap.entrySet()) {
List<KeyValue> kvs = f.getValue();
for (KeyValue kv: kvs) {
if (Bytes.compareTo(kv.getBuffer(), kv.getFamilyOffset(),
kv.getFamilyLength(), AccessControlLists.ACL_LIST_FAMILY, 0,
AccessControlLists.ACL_LIST_FAMILY.length) == 0) {
String tableName = Bytes.toString(kv.getRow());
tableSet.add(tableName);
}
}
}
for (String tableName: tableSet) {
try {
ListMultimap<String,TablePermission> perms =
AccessControlLists.getTablePermissions(regionEnv.getConfiguration(),
Bytes.toBytes(tableName));
byte[] serialized = AccessControlLists.writePermissionsAsBytes(
perms, e.getRegion().getConf());
this.authManager.getZKPermissionWatcher().writeToZookeeper(tableName,
serialized);
} catch (IOException ex) {
LOG.error("Failed updating permissions mirror for '" + tableName +
"'", ex);
}
}
}
/**
* Check the current user for authorization to perform a specific action
* against the given set of row data.
*
* <p>Note: Ordering of the authorization checks
* has been carefully optimized to short-circuit the most common requests
* and minimize the amount of processing required.</p>
*
* @param permRequest the action being requested
* @param e the coprocessor environment
* @param families the map of column families to qualifiers present in
* the request
* @return
*/
AuthResult permissionGranted(User user, TablePermission.Action permRequest,
RegionCoprocessorEnvironment e,
Map<byte [], ? extends Collection<?>> families) {
HRegionInfo hri = e.getRegion().getRegionInfo();
HTableDescriptor htd = e.getRegion().getTableDesc();
byte[] tableName = hri.getTableName();
// 1. All users need read access to .META. and -ROOT- tables.
// this is a very common operation, so deal with it quickly.
if ((hri.isRootRegion() || hri.isMetaRegion()) &&
(permRequest == TablePermission.Action.READ)) {
return AuthResult.allow("All users allowed", user, permRequest,
hri.getTableName());
}
if (user == null) {
return AuthResult.deny("No user associated with request!", null,
permRequest, hri.getTableName());
}
// 2. The table owner has full privileges
String owner = htd.getOwnerString();
if (user.getShortName().equals(owner)) {
// owner of the table has full access
return AuthResult.allow("User is table owner", user, permRequest,
hri.getTableName());
}
// 3. check for the table-level, if successful we can short-circuit
if (authManager.authorize(user, tableName, (byte[])null, permRequest)) {
return AuthResult.allow("Table permission granted", user,
permRequest, tableName);
}
// 4. check permissions against the requested families
if (families != null && families.size() > 0) {
// all families must pass
for (Map.Entry<byte [], ? extends Collection<?>> family : families.entrySet()) {
// a) check for family level access
if (authManager.authorize(user, tableName, family.getKey(),
permRequest)) {
continue; // family-level permission overrides per-qualifier
}
// b) qualifier level access can still succeed
if ((family.getValue() != null) && (family.getValue().size() > 0)) {
if (family.getValue() instanceof Set) {
// for each qualifier of the family
Set<byte[]> familySet = (Set<byte[]>)family.getValue();
for (byte[] qualifier : familySet) {
if (!authManager.authorize(user, tableName, family.getKey(),
qualifier, permRequest)) {
return AuthResult.deny("Failed qualifier check", user,
permRequest, tableName, family.getKey(), qualifier);
}
}
} else if (family.getValue() instanceof List) { // List<KeyValue>
List<KeyValue> kvList = (List<KeyValue>)family.getValue();
for (KeyValue kv : kvList) {
if (!authManager.authorize(user, tableName, family.getKey(),
kv.getQualifier(), permRequest)) {
return AuthResult.deny("Failed qualifier check", user,
permRequest, tableName, family.getKey(), kv.getQualifier());
}
}
}
} else {
// no qualifiers and family-level check already failed
return AuthResult.deny("Failed family check", user, permRequest,
tableName, family.getKey(), null);
}
}
// all family checks passed
return AuthResult.allow("All family checks passed", user, permRequest,
tableName);
}
// 5. no families to check and table level access failed
return AuthResult.deny("No families to check and table permission failed",
user, permRequest, tableName);
}
private void logResult(AuthResult result) {
if (AUDITLOG.isTraceEnabled()) {
AUDITLOG.trace("Access " + (result.isAllowed() ? "allowed" : "denied") +
" for user " + (result.getUser() != null ? result.getUser().getShortName() : "UNKNOWN") +
"; reason: " + result.getReason() +
"; context: " + result.toContextString());
}
}
/**
* Returns the active user to which authorization checks should be applied.
* If we are in the context of an RPC call, the remote user is used,
* otherwise the currently logged in user is used.
*/
private User getActiveUser() throws IOException {
User user = RequestContext.getRequestUser();
if (!RequestContext.isInRequestContext()) {
// for non-rpc handling, fallback to system user
user = User.getCurrent();
}
return user;
}
/**
* Authorizes that the current user has global privileges for the given action.
* @param perm The action being requested
* @throws IOException if obtaining the current user fails
* @throws AccessDeniedException if authorization is denied
*/
private void requirePermission(Permission.Action perm) throws IOException {
User user = getActiveUser();
if (authManager.authorize(user, perm)) {
logResult(AuthResult.allow("Global check allowed", user, perm, null));
} else {
logResult(AuthResult.deny("Global check failed", user, perm, null));
throw new AccessDeniedException("Insufficient permissions for user '" +
(user != null ? user.getShortName() : "null") +"' (global, action=" +
perm.toString() + ")");
}
}
/**
* Authorizes that the current user has permission to perform the given
* action on the set of table column families.
* @param perm Action that is required
* @param env The current coprocessor environment
* @param families The set of column families present/required in the request
* @throws AccessDeniedException if the authorization check failed
*/
private void requirePermission(Permission.Action perm,
RegionCoprocessorEnvironment env, Collection<byte[]> families)
throws IOException {
// create a map of family-qualifier
HashMap<byte[], Set<byte[]>> familyMap = new HashMap<byte[], Set<byte[]>>();
for (byte[] family : families) {
familyMap.put(family, null);
}
requirePermission(perm, env, familyMap);
}
/**
* Authorizes that the current user has permission to perform the given
* action on the set of table column families.
* @param perm Action that is required
* @param env The current coprocessor environment
* @param families The map of column families-qualifiers.
* @throws AccessDeniedException if the authorization check failed
*/
private void requirePermission(Permission.Action perm,
RegionCoprocessorEnvironment env,
Map<byte[], ? extends Collection<?>> families)
throws IOException {
User user = getActiveUser();
AuthResult result = permissionGranted(user, perm, env, families);
logResult(result);
if (!result.isAllowed()) {
StringBuffer sb = new StringBuffer("");
if ((families != null && families.size() > 0)) {
for (byte[] familyName : families.keySet()) {
if (sb.length() != 0) {
sb.append(", ");
}
sb.append(Bytes.toString(familyName));
}
}
throw new AccessDeniedException("Insufficient permissions (table=" +
env.getRegion().getTableDesc().getNameAsString()+
((families != null && families.size() > 0) ? ", family: " +
sb.toString() : "") + ", action=" +
perm.toString() + ")");
}
}
/**
* Returns <code>true</code> if the current user is allowed the given action
* over at least one of the column qualifiers in the given column families.
*/
private boolean hasFamilyQualifierPermission(User user,
TablePermission.Action perm,
RegionCoprocessorEnvironment env,
Map<byte[], ? extends Set<byte[]>> familyMap)
throws IOException {
HRegionInfo hri = env.getRegion().getRegionInfo();
byte[] tableName = hri.getTableName();
if (user == null) {
return false;
}
if (familyMap != null && familyMap.size() > 0) {
// at least one family must be allowed
for (Map.Entry<byte[], ? extends Set<byte[]>> family :
familyMap.entrySet()) {
if (family.getValue() != null && !family.getValue().isEmpty()) {
for (byte[] qualifier : family.getValue()) {
if (authManager.matchPermission(user, tableName,
family.getKey(), qualifier, perm)) {
return true;
}
}
} else {
if (authManager.matchPermission(user, tableName, family.getKey(),
perm)) {
return true;
}
}
}
} else if (LOG.isDebugEnabled()) {
LOG.debug("Empty family map passed for permission check");
}
return false;
}
/* ---- MasterObserver implementation ---- */
public void start(CoprocessorEnvironment env) throws IOException {
// if running on HMaster
if (env instanceof MasterCoprocessorEnvironment) {
MasterCoprocessorEnvironment e = (MasterCoprocessorEnvironment)env;
this.authManager = TableAuthManager.get(
e.getMasterServices().getZooKeeper(),
e.getConfiguration());
}
// if running at region
if (env instanceof RegionCoprocessorEnvironment) {
regionEnv = (RegionCoprocessorEnvironment)env;
}
}
public void stop(CoprocessorEnvironment env) {
}
@Override
public void preCreateTable(ObserverContext<MasterCoprocessorEnvironment> c,
HTableDescriptor desc, HRegionInfo[] regions) throws IOException {
requirePermission(Permission.Action.CREATE);
// default the table owner if not specified
User owner = getActiveUser();
if (desc.getOwnerString() == null ||
desc.getOwnerString().equals("")) {
desc.setOwner(owner);
}
}
@Override
public void postCreateTable(ObserverContext<MasterCoprocessorEnvironment> c,
HTableDescriptor desc, HRegionInfo[] regions) throws IOException {}
@Override
public void preDeleteTable(ObserverContext<MasterCoprocessorEnvironment> c,
byte[] tableName) throws IOException {
requirePermission(Permission.Action.CREATE);
}
@Override
public void postDeleteTable(ObserverContext<MasterCoprocessorEnvironment> c,
byte[] tableName) throws IOException {}
@Override
public void preModifyTable(ObserverContext<MasterCoprocessorEnvironment> c,
byte[] tableName, HTableDescriptor htd) throws IOException {
requirePermission(Permission.Action.CREATE);
}
@Override
public void postModifyTable(ObserverContext<MasterCoprocessorEnvironment> c,
byte[] tableName, HTableDescriptor htd) throws IOException {}
@Override
public void preAddColumn(ObserverContext<MasterCoprocessorEnvironment> c,
byte[] tableName, HColumnDescriptor column) throws IOException {
requirePermission(Permission.Action.CREATE);
}
@Override
public void postAddColumn(ObserverContext<MasterCoprocessorEnvironment> c,
byte[] tableName, HColumnDescriptor column) throws IOException {}
@Override
public void preModifyColumn(ObserverContext<MasterCoprocessorEnvironment> c,
byte[] tableName, HColumnDescriptor descriptor) throws IOException {
requirePermission(Permission.Action.CREATE);
}
@Override
public void postModifyColumn(ObserverContext<MasterCoprocessorEnvironment> c,
byte[] tableName, HColumnDescriptor descriptor) throws IOException {}
@Override
public void preDeleteColumn(ObserverContext<MasterCoprocessorEnvironment> c,
byte[] tableName, byte[] col) throws IOException {
requirePermission(Permission.Action.CREATE);
}
@Override
public void postDeleteColumn(ObserverContext<MasterCoprocessorEnvironment> c,
byte[] tableName, byte[] col) throws IOException {}
@Override
public void preEnableTable(ObserverContext<MasterCoprocessorEnvironment> c,
byte[] tableName) throws IOException {
/* TODO: Allow for users with global CREATE permission and the table owner */
requirePermission(Permission.Action.ADMIN);
}
@Override
public void postEnableTable(ObserverContext<MasterCoprocessorEnvironment> c,
byte[] tableName) throws IOException {}
@Override
public void preDisableTable(ObserverContext<MasterCoprocessorEnvironment> c,
byte[] tableName) throws IOException {
/* TODO: Allow for users with global CREATE permission and the table owner */
requirePermission(Permission.Action.ADMIN);
}
@Override
public void postDisableTable(ObserverContext<MasterCoprocessorEnvironment> c,
byte[] tableName) throws IOException {}
@Override
public void preMove(ObserverContext<MasterCoprocessorEnvironment> c,
HRegionInfo region, ServerName srcServer, ServerName destServer)
throws IOException {
requirePermission(Permission.Action.ADMIN);
}
@Override
public void postMove(ObserverContext<MasterCoprocessorEnvironment> c,
HRegionInfo region, ServerName srcServer, ServerName destServer)
throws IOException {}
@Override
public void preAssign(ObserverContext<MasterCoprocessorEnvironment> c,
HRegionInfo regionInfo) throws IOException {
requirePermission(Permission.Action.ADMIN);
}
@Override
public void postAssign(ObserverContext<MasterCoprocessorEnvironment> c,
HRegionInfo regionInfo) throws IOException {}
@Override
public void preUnassign(ObserverContext<MasterCoprocessorEnvironment> c,
HRegionInfo regionInfo, boolean force) throws IOException {
requirePermission(Permission.Action.ADMIN);
}
@Override
public void postUnassign(ObserverContext<MasterCoprocessorEnvironment> c,
HRegionInfo regionInfo, boolean force) throws IOException {}
@Override
public void preBalance(ObserverContext<MasterCoprocessorEnvironment> c)
throws IOException {
requirePermission(Permission.Action.ADMIN);
}
@Override
public void postBalance(ObserverContext<MasterCoprocessorEnvironment> c)
throws IOException {}
@Override
public boolean preBalanceSwitch(ObserverContext<MasterCoprocessorEnvironment> c,
boolean newValue) throws IOException {
requirePermission(Permission.Action.ADMIN);
return newValue;
}
@Override
public void postBalanceSwitch(ObserverContext<MasterCoprocessorEnvironment> c,
boolean oldValue, boolean newValue) throws IOException {}
@Override
public void preShutdown(ObserverContext<MasterCoprocessorEnvironment> c)
throws IOException {
requirePermission(Permission.Action.ADMIN);
}
@Override
public void preStopMaster(ObserverContext<MasterCoprocessorEnvironment> c)
throws IOException {
requirePermission(Permission.Action.ADMIN);
}
@Override
public void postStartMaster(ObserverContext<MasterCoprocessorEnvironment> ctx)
throws IOException {
// initialize the ACL storage table
AccessControlLists.init(ctx.getEnvironment().getMasterServices());
}
/* ---- RegionObserver implementation ---- */
@Override
public void postOpen(ObserverContext<RegionCoprocessorEnvironment> c) {
RegionCoprocessorEnvironment e = c.getEnvironment();
final HRegion region = e.getRegion();
if (region == null) {
LOG.error("NULL region from RegionCoprocessorEnvironment in postOpen()");
return;
}
try {
this.authManager = TableAuthManager.get(
e.getRegionServerServices().getZooKeeper(),
e.getRegion().getConf());
} catch (IOException ioe) {
// pass along as a RuntimeException, so that the coprocessor is unloaded
throw new RuntimeException("Error obtaining TableAuthManager", ioe);
}
if (AccessControlLists.isAclRegion(region)) {
aclRegion = true;
try {
initialize(e);
} catch (IOException ex) {
// if we can't obtain permissions, it's better to fail
// than perform checks incorrectly
throw new RuntimeException("Failed to initialize permissions cache", ex);
}
}
}
@Override
public void preGetClosestRowBefore(final ObserverContext<RegionCoprocessorEnvironment> c,
final byte [] row, final byte [] family, final Result result)
throws IOException {
requirePermission(TablePermission.Action.READ, c.getEnvironment(),
(family != null ? Lists.newArrayList(family) : null));
}
@Override
public void preGet(final ObserverContext<RegionCoprocessorEnvironment> c,
final Get get, final List<KeyValue> result) throws IOException {
/*
if column family level checks fail, check for a qualifier level permission
in one of the families. If it is present, then continue with the AccessControlFilter.
*/
RegionCoprocessorEnvironment e = c.getEnvironment();
User requestUser = getActiveUser();
AuthResult authResult = permissionGranted(requestUser,
TablePermission.Action.READ, e, get.getFamilyMap());
if (!authResult.isAllowed()) {
if (hasFamilyQualifierPermission(requestUser,
TablePermission.Action.READ, e, get.getFamilyMap())) {
byte[] table = getTableName(e);
AccessControlFilter filter = new AccessControlFilter(authManager,
requestUser, table);
// wrap any existing filter
if (get.getFilter() != null) {
FilterList wrapper = new FilterList(FilterList.Operator.MUST_PASS_ALL,
Lists.newArrayList(filter, get.getFilter()));
get.setFilter(wrapper);
} else {
get.setFilter(filter);
}
logResult(AuthResult.allow("Access allowed with filter", requestUser,
TablePermission.Action.READ, authResult.table));
} else {
logResult(authResult);
throw new AccessDeniedException("Insufficient permissions (table=" +
e.getRegion().getTableDesc().getNameAsString() + ", action=READ)");
}
} else {
// log auth success
logResult(authResult);
}
}
@Override
public boolean preExists(final ObserverContext<RegionCoprocessorEnvironment> c,
final Get get, final boolean exists) throws IOException {
requirePermission(TablePermission.Action.READ, c.getEnvironment(),
get.familySet());
return exists;
}
@Override
public void prePut(final ObserverContext<RegionCoprocessorEnvironment> c,
final Put put, final WALEdit edit, final boolean writeToWAL)
throws IOException {
requirePermission(TablePermission.Action.WRITE, c.getEnvironment(),
put.getFamilyMap());
}
@Override
public void postPut(final ObserverContext<RegionCoprocessorEnvironment> c,
final Put put, final WALEdit edit, final boolean writeToWAL) {
if (aclRegion) {
updateACL(c.getEnvironment(), put.getFamilyMap());
}
}
@Override
public void preDelete(final ObserverContext<RegionCoprocessorEnvironment> c,
final Delete delete, final WALEdit edit, final boolean writeToWAL)
throws IOException {
requirePermission(TablePermission.Action.WRITE, c.getEnvironment(),
delete.getFamilyMap());
}
@Override
public void postDelete(final ObserverContext<RegionCoprocessorEnvironment> c,
final Delete delete, final WALEdit edit, final boolean writeToWAL)
throws IOException {
if (aclRegion) {
updateACL(c.getEnvironment(), delete.getFamilyMap());
}
}
@Override
public boolean preCheckAndPut(final ObserverContext<RegionCoprocessorEnvironment> c,
final byte [] row, final byte [] family, final byte [] qualifier,
final CompareFilter.CompareOp compareOp,
final WritableByteArrayComparable comparator, final Put put,
final boolean result) throws IOException {
requirePermission(TablePermission.Action.READ, c.getEnvironment(),
Arrays.asList(new byte[][]{family}));
return result;
}
@Override
public boolean preCheckAndDelete(final ObserverContext<RegionCoprocessorEnvironment> c,
final byte [] row, final byte [] family, final byte [] qualifier,
final CompareFilter.CompareOp compareOp,
final WritableByteArrayComparable comparator, final Delete delete,
final boolean result) throws IOException {
requirePermission(TablePermission.Action.READ, c.getEnvironment(),
Arrays.asList( new byte[][] {family}));
return result;
}
@Override
public long preIncrementColumnValue(final ObserverContext<RegionCoprocessorEnvironment> c,
final byte [] row, final byte [] family, final byte [] qualifier,
final long amount, final boolean writeToWAL)
throws IOException {
requirePermission(TablePermission.Action.WRITE, c.getEnvironment(),
Arrays.asList(new byte[][]{family}));
return -1;
}
@Override
public Result preIncrement(final ObserverContext<RegionCoprocessorEnvironment> c,
final Increment increment)
throws IOException {
requirePermission(TablePermission.Action.WRITE, c.getEnvironment(),
increment.getFamilyMap().keySet());
return null;
}
@Override
public RegionScanner preScannerOpen(final ObserverContext<RegionCoprocessorEnvironment> c,
final Scan scan, final RegionScanner s) throws IOException {
/*
if column family level checks fail, check for a qualifier level permission
in one of the families. If it is present, then continue with the AccessControlFilter.
*/
RegionCoprocessorEnvironment e = c.getEnvironment();
User user = getActiveUser();
AuthResult authResult = permissionGranted(user, TablePermission.Action.READ, e,
scan.getFamilyMap());
if (!authResult.isAllowed()) {
if (hasFamilyQualifierPermission(user, TablePermission.Action.READ, e,
scan.getFamilyMap())) {
byte[] table = getTableName(e);
AccessControlFilter filter = new AccessControlFilter(authManager,
user, table);
// wrap any existing filter
if (scan.hasFilter()) {
FilterList wrapper = new FilterList(FilterList.Operator.MUST_PASS_ALL,
Lists.newArrayList(filter, scan.getFilter()));
scan.setFilter(wrapper);
} else {
scan.setFilter(filter);
}
logResult(AuthResult.allow("Access allowed with filter", user,
TablePermission.Action.READ, authResult.table));
} else {
// no table/family level perms and no qualifier level perms, reject
logResult(authResult);
throw new AccessDeniedException("Insufficient permissions for user '"+
(user != null ? user.getShortName() : "null")+"' "+
"for scanner open on table " + Bytes.toString(getTableName(e)));
}
} else {
// log success
logResult(authResult);
}
return s;
}
@Override
public RegionScanner postScannerOpen(final ObserverContext<RegionCoprocessorEnvironment> c,
final Scan scan, final RegionScanner s) throws IOException {
User user = getActiveUser();
if (user != null && user.getShortName() != null) { // store reference to scanner owner for later checks
scannerOwners.put(s, user.getShortName());
}
return s;
}
@Override
public boolean preScannerNext(final ObserverContext<RegionCoprocessorEnvironment> c,
final InternalScanner s, final List<Result> result,
final int limit, final boolean hasNext) throws IOException {
requireScannerOwner(s);
return hasNext;
}
@Override
public void preScannerClose(final ObserverContext<RegionCoprocessorEnvironment> c,
final InternalScanner s) throws IOException {
requireScannerOwner(s);
}
@Override
public void postScannerClose(final ObserverContext<RegionCoprocessorEnvironment> c,
final InternalScanner s) throws IOException {
// clean up any associated owner mapping
scannerOwners.remove(s);
}
/**
* Verify, when servicing an RPC, that the caller is the scanner owner.
* If so, we assume that access control is correctly enforced based on
* the checks performed in preScannerOpen()
*/
private void requireScannerOwner(InternalScanner s)
throws AccessDeniedException {
if (RequestContext.isInRequestContext()) {
String owner = scannerOwners.get(s);
if (owner != null && !owner.equals(RequestContext.getRequestUserName())) {
throw new AccessDeniedException("User '"+
RequestContext.getRequestUserName()+"' is not the scanner owner!");
}
}
}
/* ---- AccessControllerProtocol implementation ---- */
/*
* These methods are only allowed to be called against the _acl_ region(s).
* This will be restricted by both client side and endpoint implementations.
*/
@Override
public void grant(byte[] user, TablePermission permission)
throws IOException {
// verify it's only running at .acl.
if (aclRegion) {
if (LOG.isDebugEnabled()) {
LOG.debug("Received request to grant access permission to '"
+ Bytes.toString(user) + "'. "
+ permission.toString());
}
requirePermission(Permission.Action.ADMIN);
AccessControlLists.addTablePermission(regionEnv.getConfiguration(),
permission.getTable(), Bytes.toString(user), permission);
if (AUDITLOG.isTraceEnabled()) {
// audit log should store permission changes in addition to auth results
AUDITLOG.trace("Granted user '" + Bytes.toString(user) + "' permission "
+ permission.toString());
}
} else {
throw new CoprocessorException(AccessController.class, "This method " +
"can only execute at " +
Bytes.toString(AccessControlLists.ACL_TABLE_NAME) + " table.");
}
}
@Override
public void revoke(byte[] user, TablePermission permission)
throws IOException{
// only allowed to be called on _acl_ region
if (aclRegion) {
if (LOG.isDebugEnabled()) {
LOG.debug("Received request to revoke access permission for '"
+ Bytes.toString(user) + "'. "
+ permission.toString());
}
requirePermission(Permission.Action.ADMIN);
AccessControlLists.removeTablePermission(regionEnv.getConfiguration(),
permission.getTable(), Bytes.toString(user), permission);
if (AUDITLOG.isTraceEnabled()) {
// audit log should record all permission changes
AUDITLOG.trace("Revoked user '" + Bytes.toString(user) + "' permission "
+ permission.toString());
}
} else {
throw new CoprocessorException(AccessController.class, "This method " +
"can only execute at " +
Bytes.toString(AccessControlLists.ACL_TABLE_NAME) + " table.");
}
}
@Override
public List<UserPermission> getUserPermissions(final byte[] tableName)
throws IOException {
// only allowed to be called on _acl_ region
if (aclRegion) {
requirePermission(Permission.Action.ADMIN);
List<UserPermission> perms = AccessControlLists.getUserPermissions
(regionEnv.getConfiguration(), tableName);
return perms;
} else {
throw new CoprocessorException(AccessController.class, "This method " +
"can only execute at " +
Bytes.toString(AccessControlLists.ACL_TABLE_NAME) + " table.");
}
}
@Override
public void checkPermissions(Permission[] permissions) throws IOException {
byte[] tableName = regionEnv.getRegion().getTableDesc().getName();
for (Permission permission : permissions) {
if (permission instanceof TablePermission) {
TablePermission tperm = (TablePermission) permission;
for (Permission.Action action : permission.getActions()) {
if (!Arrays.equals(tperm.getTable(), tableName)) {
throw new CoprocessorException(AccessController.class, String.format("This method "
+ "can only execute at the table specified in TablePermission. " +
"Table of the region:%s , requested table:%s", Bytes.toString(tableName),
Bytes.toString(tperm.getTable())));
}
HashMap<byte[], Set<byte[]>> familyMap = Maps.newHashMapWithExpectedSize(1);
if (tperm.getFamily() != null) {
if (tperm.getQualifier() != null) {
familyMap.put(tperm.getFamily(), Sets.newHashSet(tperm.getQualifier()));
} else {
familyMap.put(tperm.getFamily(), null);
}
}
requirePermission(action, regionEnv, familyMap);
}
} else {
for (Permission.Action action : permission.getActions()) {
requirePermission(action);
}
}
}
}
@Override
public long getProtocolVersion(String protocol, long clientVersion) throws IOException {
return PROTOCOL_VERSION;
}
@Override
public ProtocolSignature getProtocolSignature(String protocol,
long clientVersion, int clientMethodsHash) throws IOException {
if (AccessControllerProtocol.class.getName().equals(protocol)) {
return new ProtocolSignature(PROTOCOL_VERSION, null);
}
throw new HBaseRPC.UnknownProtocolException(
"Unexpected protocol requested: "+protocol);
}
private byte[] getTableName(RegionCoprocessorEnvironment e) {
HRegion region = e.getRegion();
byte[] tableName = null;
if (region != null) {
HRegionInfo regionInfo = region.getRegionInfo();
if (regionInfo != null) {
tableName = regionInfo.getTableName();
}
}
return tableName;
}
}