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Posted to commits@ranger.apache.org by ma...@apache.org on 2014/12/12 02:30:17 UTC

[34/51] [partial] incubator-ranger git commit: RANGER-194: Rename packages from xasecure to apache ranger

http://git-wip-us.apache.org/repos/asf/incubator-ranger/blob/413fcb68/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/Crypt.java
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diff --git a/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/Crypt.java b/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/Crypt.java
new file mode 100644
index 0000000..ded5eb5
--- /dev/null
+++ b/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/Crypt.java
@@ -0,0 +1,85 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.ranger.authorization.hbase;
+
+import javax.crypto.Cipher;
+import javax.crypto.spec.IvParameterSpec;
+import javax.crypto.spec.SecretKeySpec;
+
+import org.apache.commons.codec.binary.Hex;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+
+public class Crypt {
+	
+	private static final Log LOG = LogFactory.getLog("SecurityLogger." + RangerAuthorizationCoprocessor.class.getName());
+
+	private static byte[] IV = { 01, 21, 22, 86, 121, 45, 98, 28, 111, 72, 54, 39, 96, 47, 84, 13 };
+	private static final byte[] encryptionKey = "324234sdff3a7d8e".getBytes();
+	private static final String CIPHER_ALGO = "AES/CBC/PKCS5Padding";
+	private static final String CIPHER_INIT_ALGO = "AES";
+	
+	private static Crypt me = null ;
+	
+	private Cipher encrypter = null;
+	private Cipher descrypter = null;
+
+
+	public static Crypt getInstance() {
+		if (me == null) {
+			synchronized (Crypt.class) {
+				Crypt other = me ;
+				if (other == null) {
+					me = new Crypt() ;
+				}
+			}
+		}
+		return me ;
+	}
+	
+	private Crypt() {
+		try {
+			encrypter = Cipher.getInstance(CIPHER_ALGO);
+			SecretKeySpec enckey = new SecretKeySpec(encryptionKey, CIPHER_INIT_ALGO);
+			encrypter.init(Cipher.ENCRYPT_MODE, enckey, new IvParameterSpec(IV));
+
+			descrypter = Cipher.getInstance(CIPHER_ALGO);
+			SecretKeySpec deckey = new SecretKeySpec(encryptionKey, CIPHER_INIT_ALGO);
+			descrypter.init(Cipher.DECRYPT_MODE, deckey, new IvParameterSpec(IV));
+		} catch (Throwable t) {
+			LOG.error("Unable to initialzie Encrypt/Decrypt module - Exiting from HBase", t);
+			System.exit(1);
+		}
+	}
+	
+	public synchronized byte[] encrypt(byte[] plainText) throws Exception {
+		byte[] ret =  encrypter.doFinal(plainText);
+		LOG.debug("Encrypted plain text: [" + new String(plainText) + "] => {" +  Hex.encodeHexString(ret)  + "}") ;
+		return ret ;
+	}
+
+	public synchronized byte[] decrypt(byte[] cipherText) throws Exception {
+		byte[] ret =  descrypter.doFinal(cipherText);
+		LOG.debug("Decrypted From text: [" + Hex.encodeHexString(cipherText)   + "] => {" +  new String(ret)   + "}") ;
+		return ret ;
+	}
+
+
+}

http://git-wip-us.apache.org/repos/asf/incubator-ranger/blob/413fcb68/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/HBaseAccessController.java
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diff --git a/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/HBaseAccessController.java b/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/HBaseAccessController.java
new file mode 100644
index 0000000..ab69712
--- /dev/null
+++ b/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/HBaseAccessController.java
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.ranger.authorization.hbase;
+
+import java.util.List;
+
+import org.apache.hadoop.hbase.security.User;
+import org.apache.hadoop.hbase.security.access.Permission.Action;
+import org.apache.hadoop.hbase.security.access.UserPermission;
+
+public interface HBaseAccessController {
+	public boolean isAccessAllowed(User user, Action accessAction) ;
+	public boolean isAccessAllowed(User user, byte[] tableName, Action accessAction) ;
+	public boolean isAccessAllowed(User user, byte[] tableName, byte[] columnFamily, byte[] qualifier, Action accessAction) ;
+	public boolean isEncrypted(byte[] tableName, byte[] columnFamily, byte[] qualifier) ;
+	public boolean isAudited(byte[] tableName) ;
+	public boolean isTableHasEncryptedColumn(byte[] tableName) ;
+	public List<UserPermission>  getUserPermissions(User user) ;
+	public List<UserPermission>  getUserPermissions(User user, byte[] tableName) ;
+
+
+
+}

http://git-wip-us.apache.org/repos/asf/incubator-ranger/blob/413fcb68/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/HBaseAccessControllerFactory.java
----------------------------------------------------------------------
diff --git a/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/HBaseAccessControllerFactory.java b/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/HBaseAccessControllerFactory.java
new file mode 100644
index 0000000..6f4301e
--- /dev/null
+++ b/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/HBaseAccessControllerFactory.java
@@ -0,0 +1,61 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.ranger.authorization.hbase;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.ranger.authorization.hadoop.config.RangerConfiguration;
+import org.apache.ranger.authorization.hadoop.constants.RangerHadoopConstants;
+
+public class HBaseAccessControllerFactory {
+	
+	private static final Log LOG = LogFactory.getLog(HBaseAccessControllerFactory.class) ;
+
+	private static HBaseAccessController hBaseAccessController = null ;
+	
+	public static HBaseAccessController getInstance() {
+		if (hBaseAccessController == null) {
+			synchronized(HBaseAccessControllerFactory.class) {
+				HBaseAccessController temp = hBaseAccessController ;
+				if (temp == null) {
+					
+					String hBaseAccessControllerClassName = RangerConfiguration.getInstance().get(RangerHadoopConstants.HBASE_ACCESS_VERIFIER_CLASS_NAME_PROP, RangerHadoopConstants.HBASE_ACCESS_VERIFIER_CLASS_NAME_DEFAULT_VALUE) ;
+					if (hBaseAccessControllerClassName != null) {
+						try {
+							hBaseAccessControllerClassName = hBaseAccessControllerClassName.trim();
+							hBaseAccessController = (HBaseAccessController) (Class.forName(hBaseAccessControllerClassName).newInstance()) ;
+							LOG.info("Created a new instance of class: [" + hBaseAccessControllerClassName + "] for HBase Access verification.");
+						} catch (InstantiationException e) {
+							LOG.error("Unable to create HBaseAccessController : [" +  hBaseAccessControllerClassName + "]", e);
+						} catch (IllegalAccessException e) {
+							LOG.error("Unable to create HBaseAccessController : [" +  hBaseAccessControllerClassName + "]", e);
+						} catch (ClassNotFoundException e) {
+							LOG.error("Unable to create HBaseAccessController : [" +  hBaseAccessControllerClassName + "]", e);
+						}
+					}
+				}
+			}
+		}
+		return hBaseAccessController ;
+		
+	}
+
+
+}

http://git-wip-us.apache.org/repos/asf/incubator-ranger/blob/413fcb68/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/RangerAccessControlFilter.java
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diff --git a/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/RangerAccessControlFilter.java b/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/RangerAccessControlFilter.java
new file mode 100644
index 0000000..9ba5331
--- /dev/null
+++ b/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/RangerAccessControlFilter.java
@@ -0,0 +1,51 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.ranger.authorization.hbase;
+
+import java.io.IOException;
+
+import org.apache.hadoop.hbase.Cell;
+import org.apache.hadoop.hbase.filter.FilterBase;
+import org.apache.hadoop.hbase.security.User;
+import org.apache.hadoop.hbase.security.access.TablePermission;
+
+public class RangerAccessControlFilter extends FilterBase {
+
+	private byte[] table = null;
+	private User user = null;
+
+	public RangerAccessControlFilter(User ugi, byte[] tableName) {
+		table = tableName;
+		user = ugi;
+	}
+	
+
+	@SuppressWarnings("deprecation")
+	@Override
+	public ReturnCode filterKeyValue(Cell kv) throws IOException {
+		HBaseAccessController accessController = HBaseAccessControllerFactory.getInstance();
+		if (accessController.isAccessAllowed(user, table, kv.getFamily(), kv.getQualifier(), TablePermission.Action.READ)) {
+			return ReturnCode.INCLUDE;
+		} else {
+			return ReturnCode.NEXT_COL;
+		}
+	}
+
+}

http://git-wip-us.apache.org/repos/asf/incubator-ranger/blob/413fcb68/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/RangerAuthorizationCoprocessor.java
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diff --git a/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/RangerAuthorizationCoprocessor.java b/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/RangerAuthorizationCoprocessor.java
new file mode 100644
index 0000000..97d17e2
--- /dev/null
+++ b/hbase-agent/src/main/java/org/apache/ranger/authorization/hbase/RangerAuthorizationCoprocessor.java
@@ -0,0 +1,1259 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.ranger.authorization.hbase;
+import java.io.IOException;
+import java.net.InetAddress;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Calendar;
+import java.util.Collection;
+import java.util.Date;
+import java.util.GregorianCalendar;
+import java.util.HashMap;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.NavigableSet;
+import java.util.Set;
+import java.util.TimeZone;
+
+import org.apache.commons.lang.StringUtils;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.Cell;
+import org.apache.hadoop.hbase.CellUtil;
+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.NamespaceDescriptor;
+import org.apache.hadoop.hbase.ServerName;
+import org.apache.hadoop.hbase.TableName;
+import org.apache.hadoop.hbase.client.Append;
+import org.apache.hadoop.hbase.client.Delete;
+import org.apache.hadoop.hbase.client.Durability;
+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.CoprocessorException;
+import org.apache.hadoop.hbase.coprocessor.CoprocessorService;
+import org.apache.hadoop.hbase.coprocessor.MasterCoprocessorEnvironment;
+import org.apache.hadoop.hbase.coprocessor.ObserverContext;
+import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
+import org.apache.hadoop.hbase.coprocessor.RegionServerCoprocessorEnvironment;
+import org.apache.hadoop.hbase.filter.ByteArrayComparable;
+import org.apache.hadoop.hbase.filter.CompareFilter.CompareOp;
+import org.apache.hadoop.hbase.filter.FilterList;
+import org.apache.hadoop.hbase.ipc.RequestContext;
+import org.apache.hadoop.hbase.master.RegionPlan;
+import org.apache.hadoop.hbase.protobuf.ProtobufUtil;
+import org.apache.hadoop.hbase.protobuf.ResponseConverter;
+import org.apache.hadoop.hbase.protobuf.generated.AccessControlProtos;
+import org.apache.hadoop.hbase.protobuf.generated.AccessControlProtos.AccessControlService;
+import org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription;
+import org.apache.hadoop.hbase.protobuf.generated.SecureBulkLoadProtos.CleanupBulkLoadRequest;
+import org.apache.hadoop.hbase.protobuf.generated.SecureBulkLoadProtos.PrepareBulkLoadRequest;
+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.ScanType;
+import org.apache.hadoop.hbase.regionserver.Store;
+import org.apache.hadoop.hbase.regionserver.StoreFile;
+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.security.access.Permission;
+import org.apache.hadoop.hbase.security.access.Permission.Action;
+import org.apache.hadoop.hbase.security.access.TablePermission;
+import org.apache.hadoop.hbase.security.access.UserPermission;
+import org.apache.hadoop.hbase.security.access.RangerAccessControlLists;
+import org.apache.hadoop.hbase.util.Bytes;
+import org.apache.hadoop.hbase.util.Pair;
+import org.apache.ranger.admin.client.RangerAdminRESTClient;
+import org.apache.ranger.admin.client.datatype.GrantRevokeData;
+import org.apache.ranger.admin.client.datatype.GrantRevokeData.PermMap;
+import org.apache.ranger.audit.model.EnumRepositoryType;
+import org.apache.ranger.audit.model.HBaseAuditEvent;
+import org.apache.ranger.audit.provider.AuditProviderFactory;
+import org.apache.ranger.authorization.hadoop.config.RangerConfiguration;
+import org.apache.ranger.authorization.hadoop.constants.RangerHadoopConstants;
+import org.apache.ranger.authorization.utils.StringUtil;
+
+import com.google.common.collect.Lists;
+import com.google.common.collect.MapMaker;
+import com.google.common.collect.Maps;
+import com.google.common.collect.Sets;
+import com.google.protobuf.RpcCallback;
+import com.google.protobuf.RpcController;
+import com.google.protobuf.Service;
+
+public class RangerAuthorizationCoprocessor extends RangerAuthorizationCoprocessorBase implements AccessControlService.Interface, CoprocessorService {
+	private static final Log LOG = LogFactory.getLog(RangerAuthorizationCoprocessor.class.getName());
+	private static final String RangerModuleName = RangerConfiguration.getInstance().get(RangerHadoopConstants.AUDITLOG_RANGER_MODULE_ACL_NAME_PROP , RangerHadoopConstants.DEFAULT_RANGER_MODULE_ACL_NAME) ;
+	private static final short  accessGrantedFlag  = 1;
+	private static final short  accessDeniedFlag   = 0;
+	private static final String repositoryName          = RangerConfiguration.getInstance().get(RangerHadoopConstants.AUDITLOG_REPOSITORY_NAME_PROP);
+	private static final boolean UpdateRangerPoliciesOnGrantRevoke = RangerConfiguration.getInstance().getBoolean(RangerHadoopConstants.HBASE_UPDATE_RANGER_POLICIES_ON_GRANT_REVOKE_PROP, RangerHadoopConstants.HBASE_UPDATE_RANGER_POLICIES_ON_GRANT_REVOKE_DEFAULT_VALUE);
+	private static final String GROUP_PREFIX = "@";
+
+		
+	private static final String SUPERUSER_CONFIG_PROP = "hbase.superuser";
+	private static final String WILDCARD = "*";
+	private static final byte[] WILDCARD_MATCH = "*".getBytes();
+	
+    private static final TimeZone gmtTimeZone = TimeZone.getTimeZone("GMT+0");
+
+    private RegionCoprocessorEnvironment regionEnv;
+	private Map<InternalScanner, String> scannerOwners = new MapMaker().weakKeys().makeMap();
+	
+	private HBaseAccessController accessController = HBaseAccessControllerFactory.getInstance();
+	private List<String> superUserList = null;
+	// Utilities Methods 
+	protected byte[] getTableName(RegionCoprocessorEnvironment e) {
+		HRegion region = e.getRegion();
+		byte[] tableName = null;
+		if (region != null) {
+			HRegionInfo regionInfo = region.getRegionInfo();
+			if (regionInfo != null) {
+				tableName = regionInfo.getTable().getName() ;
+			}
+		}
+		return tableName;
+	}
+	protected void isSystemOrSuperUser(Configuration conf) throws IOException {
+		User user = User.getCurrent();
+		if (user == null) {
+			throw new IOException("Unable to obtain the current user, authorization checks for internal operations will not work correctly!");
+		}
+		String currentUser = user.getShortName();
+		List<String> superusers = Lists.asList(currentUser, conf.getStrings(SUPERUSER_CONFIG_PROP, new String[0]));
+		User activeUser = getActiveUser();
+		if (!(superusers.contains(activeUser.getShortName()))) {
+			throw new AccessDeniedException("User '" + (user != null ? user.getShortName() : "null") + "is not system or super user.");
+		}
+	}
+	private boolean isSuperUser(User user) {
+		boolean isSuper = false;
+		isSuper = (superUserList != null && superUserList.contains(user.getShortName()));
+		if (LOG.isDebugEnabled()) {
+			LOG.debug("IsSuperCheck on [" + user.getShortName() + "] returns [" + isSuper + "]");
+		}
+		return isSuper;
+	}
+	protected boolean isSpecialTable(HRegionInfo regionInfo) {
+		return isSpecialTable(regionInfo.getTable().getName());
+	}
+	protected boolean isSpecialTable(byte[] tableName) {
+		return isSpecialTable(Bytes.toString(tableName));
+	}
+	protected boolean isSpecialTable(String tableNameStr) {
+		return tableNameStr.equals("hbase:meta") ||  tableNameStr.equals("-ROOT-") || tableNameStr.equals(".META.");
+	}
+	@SuppressWarnings("unused")
+	private String getUser() {
+		User u = getActiveUser();
+		if (u == null) {
+			return "(user:unknown)";
+		} else {
+			String groups = (u.getGroupNames() == null) ? "" : StringUtils.join(u.getGroupNames(), ",");
+			return "(user:" + u.getShortName() + ", groups: [" + groups + "])";
+		}
+	}
+	private User getActiveUser() {
+		User user = RequestContext.getRequestUser();
+		if (!RequestContext.isInRequestContext()) {
+			// for non-rpc handling, fallback to system user
+			try {
+				user = User.getCurrent();
+			} catch (IOException e) {
+				LOG.error("Unable to find the current user");
+				user = null;
+			}
+		}
+		return user;
+	}
+	
+	private String getRemoteAddress() {
+		RequestContext reqContext = RequestContext.get();
+		InetAddress    remoteAddr = reqContext != null ? reqContext.getRemoteAddress() : null;
+		String         strAddr    = remoteAddr != null ? remoteAddr.getHostAddress() : null;
+
+		return strAddr;
+	}
+
+	// Methods that are used within the CoProcessor 
+	private void requireScannerOwner(InternalScanner s) throws AccessDeniedException {
+		if (RequestContext.isInRequestContext()) {
+			String requestUserName = RequestContext.getRequestUserName();
+			String owner = scannerOwners.get(s);
+			if (owner != null && !owner.equals(requestUserName)) {
+				throw new AccessDeniedException("User '" + requestUserName + "' is not the scanner owner!");
+			}
+		}
+	}
+	// Methods that are delegated to AUTHManager 
+	public boolean isPermissionGranted(User user, Action action) {
+		if (isSuperUser(user)) {
+			return true;
+		} else {
+			return accessController.isAccessAllowed(user, action);
+		}
+	}
+	public boolean isPermissionGranted(User user, byte[] tableName, Action action) {
+		if (isSuperUser(user)) {
+			return true;
+		} else {
+			return accessController.isAccessAllowed(user, tableName, action);
+		}
+	}
+	public boolean isPermissionGranted(User user, byte[] tableName, byte[] colf, Action action) {
+		if (isSuperUser(user)) {
+			return true;
+		} else {
+			return accessController.isAccessAllowed(user, tableName, colf, WILDCARD_MATCH, action);
+		}
+	}
+	public boolean isPermissionGranted(User user, byte[] tableName, byte[] colf, byte[] col, Action action) {
+		if (isSuperUser(user)) {
+			return true;
+		} else {
+			return accessController.isAccessAllowed(user, tableName, colf, col, action);
+		}
+	}
+	// Methods that are internally used by co-processors 
+	@SuppressWarnings("unchecked")
+	public void requirePermission(String request, Action action, RegionCoprocessorEnvironment rEnv, Map<byte[], ? extends Collection<?>> families) throws IOException {
+		HRegionInfo hri = rEnv.getRegion().getRegionInfo();
+		byte[] tableName = hri.getTable().getName() ;
+		String tableNameStr = Bytes.toString(tableName);
+		if (hri.isMetaTable() || hri.isMetaRegion()) {
+			if (action == TablePermission.Action.READ) {
+				return;
+			}
+		}
+		User user = getActiveUser();
+		if (user == null) {
+			throw new AccessDeniedException("No user associated with request (" + request + ") for action: " + action + "on table:" + tableName);
+		}
+		if (isSuperUser(user)) {
+			return;
+		}
+		if (action == TablePermission.Action.WRITE && (hri.isMetaTable() || hri.isMetaRegion()) && (isPermissionGranted(user, Permission.Action.CREATE) || isPermissionGranted(user, Permission.Action.ADMIN))) {
+			return;
+		}
+		if (isPermissionGranted(user, tableName, (byte[]) null, action)) {
+			return;
+		}
+		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 (isPermissionGranted(user, tableName, family.getKey(), action)) {
+					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) { // Set<byte[]> - Set
+															// of Columns
+						// for each qualifier of the family
+						Set<byte[]> qualifierSet = (Set<byte[]>) family.getValue();
+						for (byte[] qualifier : qualifierSet) {
+							if (!isPermissionGranted(user, tableName, family.getKey(), qualifier, action)) {
+								if (accessController.isAudited(tableName)) {
+									auditEvent(request, tableName, family.getKey(), qualifier, null, null, user, accessDeniedFlag);
+								}
+								throw new AccessDeniedException("Insufficient permissions for user '" + user + "',action: " + action + ", tableName:" + tableNameStr + ", family:" + Bytes.toString(family.getKey()) + ",column: " + Bytes.toString(qualifier));
+							}
+						}
+					} else if (family.getValue() instanceof List) { // List<KeyValue>
+																	// - List of
+																	// KeyValue
+																	// pair
+						List<KeyValue> kvList = (List<KeyValue>) family.getValue();
+						for (KeyValue kv : kvList) {
+							if (!isPermissionGranted(user, tableName, family.getKey(), kv.getQualifier(), action)) {
+								if (accessController.isAudited(tableName)) {
+									auditEvent(request, tableName, family.getKey(), kv.getQualifier(), null, null, user, accessDeniedFlag);
+								}
+								throw new AccessDeniedException("Insufficient permissions for user '" + user + "',action: " + action + ", tableName:" + tableNameStr + ", family:" + Bytes.toString(family.getKey()) + ",column: " + Bytes.toString(kv.getQualifier()));
+							}
+						}
+					}
+				} else {
+					if (accessController.isAudited(tableName)) {
+						auditEvent(request, tableName, family.getKey(), null, null, null, user, accessDeniedFlag);
+					}
+					throw new AccessDeniedException("Insufficient permissions for user '" + user + "',action: " + action + ", tableName:" + tableNameStr + ", family:" + Bytes.toString(family.getKey()) + ", no columns found.");
+				}
+			}
+			return;
+		}
+		if (accessController.isAudited(tableName)) {
+			auditEvent(request, tableName, null, null, null, null, user, accessDeniedFlag);
+		}
+		throw new AccessDeniedException("Insufficient permissions for user '" + user + "',action: " + action + ", tableName:" + tableNameStr);
+	}
+	// Check if the user has global permission ...
+	protected void requireGlobalPermission(String request, String objName, Permission.Action action) throws AccessDeniedException {
+		User user = getActiveUser();
+		if (!isPermissionGranted(user, action)) {
+			if (accessController.isAudited(WILDCARD_MATCH)) {
+				auditEvent(request, objName, null, null, null, null, user, accessDeniedFlag);
+			}
+			throw new AccessDeniedException("Insufficient permissions for user '" + getActiveUser() + "' (global, action=" + action + ")");
+		}
+	}
+	protected void requirePermission(String request, byte[] tableName, Permission.Action action) throws AccessDeniedException {
+		User user = getActiveUser();
+		if (!isPermissionGranted(user, tableName, action)) {
+			if (accessController.isAudited(tableName)) {
+				auditEvent(request, tableName, null, null, null, null, user, accessDeniedFlag);
+			}
+			throw new AccessDeniedException("Insufficient permissions for user '" + getActiveUser() + "' (global, action=" + action + ")");
+		}
+	}
+	protected void requirePermission(String request, byte[] aTableName, byte[] aColumnFamily, byte[] aQualifier, Permission.Action... actions) throws AccessDeniedException {
+		User user = getActiveUser();
+		boolean isAllowed = false;
+
+		for (Action action : actions) {
+			isAllowed = isPermissionGranted(user, aTableName, aColumnFamily, aQualifier, action);
+
+			if(isAllowed) {
+				break;
+			}
+		}
+		
+		if (!isAllowed) {
+			if (accessController.isAudited(aTableName)) {
+				auditEvent(request, aTableName, aColumnFamily, aQualifier, null, null, user, accessDeniedFlag);
+			}
+			Permission.Action deniedAction = actions.length > 0 ? actions[0] : null;
+
+			throw new AccessDeniedException("Insufficient permissions for user '" + user + "',action: " + deniedAction + ", tableName:" + Bytes.toString(aTableName) + ", family:" + Bytes.toString(aColumnFamily) + ",column: " + Bytes.toString(aQualifier));
+		}
+	}
+	protected void requirePermission(String request, Permission.Action perm, RegionCoprocessorEnvironment env, Collection<byte[]> families) throws IOException {
+		HashMap<byte[], Set<byte[]>> familyMap = new HashMap<byte[], Set<byte[]>>();
+
+		if(families != null) {
+			for (byte[] family : families) {
+				familyMap.put(family, null);
+			}
+		}
+		requirePermission(request, perm, env, familyMap);
+	}
+	protected boolean isPermissionGranted(String request, User requestUser, Permission.Action perm, RegionCoprocessorEnvironment env, Map<byte[], NavigableSet<byte[]>> familyMap) {
+		boolean ret = true;
+		try {
+			requirePermission(request, perm, env, familyMap);
+		} catch (Throwable t) {
+			ret = false;
+		}
+		return ret;
+	}
+	protected boolean hasFamilyQualifierPermission(User requestUser, Permission.Action perm, RegionCoprocessorEnvironment env, Map<byte[], NavigableSet<byte[]>> familyMap) {
+		User user = requestUser;
+		byte[] tableName = getTableName(env);
+		if (familyMap != null && familyMap.size() > 0) {
+			for (Map.Entry<byte[], NavigableSet<byte[]>> family : familyMap.entrySet()) {
+				if (family.getValue() != null && !family.getValue().isEmpty()) {
+					for (byte[] qualifier : family.getValue()) {
+						boolean isGranted = isPermissionGranted(user, tableName, family.getKey(), qualifier, perm);
+						LOG.info(":=> hasFamilyQualifierPermission: T(" + Bytes.toString(tableName) + "), family: (" + Bytes.toString(family.getKey() ) + "), Q(" + Bytes.toString(qualifier) + "), Permission: [" + perm + "] => [" + isGranted + "]") ;
+						if (isGranted) {
+							return true;
+						}
+					}
+				} else {
+					boolean isGranted = isPermissionGranted(user, tableName, family.getKey(), perm);
+					LOG.info(":=>  hasFamilyPermission: T(" + Bytes.toString(tableName) + "), family: (" + Bytes.toString(family.getKey() ) + ", Permission: [" + perm + "] => [" + isGranted + "]") ;
+					if (isGranted) {
+						return true;
+					}
+				}
+			}
+		} else {
+			if (LOG.isDebugEnabled()) {
+				LOG.debug("Empty family map passed for permission check");
+			}
+		}
+		return false;
+	}
+	
+	
+	public void checkPermissions(Permission[] permissions) throws IOException {
+		String tableName = regionEnv.getRegion().getTableDesc().getTableName().getNameAsString() ;
+		for (Permission permission : permissions) {
+			if (permission instanceof TablePermission) {
+				TablePermission tperm = (TablePermission) permission;
+				for (Permission.Action action : permission.getActions()) {
+					if (! tperm.getTableName().getNameAsString().equals(tableName)) {
+						throw new AccessDeniedException(String.format("This method can only execute at the table specified in TablePermission. " + "Table of the region:%s , requested table:%s", tableName, 
+																	  tperm.getTableName().getNameAsString()));
+					}
+					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("checkPermissions", action, regionEnv, familyMap);
+				}
+			} else {
+				for (Permission.Action action : permission.getActions()) {
+					byte[] tname = regionEnv.getRegion().getTableDesc().getTableName().getName() ;
+					requirePermission("checkPermissions", tname, action);
+				}
+			}
+		}
+	}
+	
+	@Override
+	public void postAddColumn(ObserverContext<MasterCoprocessorEnvironment> c, TableName tableName, HColumnDescriptor column) throws IOException {
+		auditEvent("addColumn", tableName.getName(), column.getName(), null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void postAssign(ObserverContext<MasterCoprocessorEnvironment> c, HRegionInfo regionInfo) throws IOException {
+		auditEvent("assign", regionInfo.getTable().getNameAsString(), null, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void postBalance(ObserverContext<MasterCoprocessorEnvironment> c,List<RegionPlan> aRegPlanList) throws IOException {
+		auditEvent("balance", (String) null, null, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void postBalanceSwitch(ObserverContext<MasterCoprocessorEnvironment> c, boolean oldValue, boolean newValue) throws IOException {
+		auditEvent("balanceSwitch", (String) null, null, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void postCloneSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx, SnapshotDescription snapshot, HTableDescriptor hTableDescriptor) throws IOException {
+		auditEvent("cloneSnapshot", hTableDescriptor.getNameAsString(), null, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void postCreateTable(ObserverContext<MasterCoprocessorEnvironment> ctx, HTableDescriptor desc, HRegionInfo[] regions) throws IOException {
+		auditEvent("createTable", desc.getNameAsString(), null, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void postDelete(ObserverContext<RegionCoprocessorEnvironment> c, Delete delete, WALEdit edit, Durability durability) throws IOException {
+		auditEvent("delete", delete.toString(), null, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void postDeleteColumn(ObserverContext<MasterCoprocessorEnvironment> c, TableName tableName, byte[] col) throws IOException {
+		auditEvent("deleteColumn", tableName.getName(), col, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void postDeleteSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx, SnapshotDescription snapshot) throws IOException {
+		auditEvent("deleteSnapShot", (String) null, null, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void postDeleteTable(ObserverContext<MasterCoprocessorEnvironment> c, TableName tableName) throws IOException {
+		auditEvent("deleteTable", tableName.getName(), null, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void postDisableTable(ObserverContext<MasterCoprocessorEnvironment> c, TableName tableName) throws IOException {
+		auditEvent("disableTable", tableName.getName(), null, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void postEnableTable(ObserverContext<MasterCoprocessorEnvironment> c, TableName tableName) throws IOException {
+		auditEvent("enableTable", tableName.getName(), null, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void postModifyColumn(ObserverContext<MasterCoprocessorEnvironment> c, TableName tableName, HColumnDescriptor descriptor) throws IOException {
+		auditEvent("modifyColumn", tableName.getName(), descriptor.getName(), null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void postModifyTable(ObserverContext<MasterCoprocessorEnvironment> c, TableName tableName, HTableDescriptor htd) throws IOException {
+		auditEvent("modifyTable", tableName.getName(), null, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void postMove(ObserverContext<MasterCoprocessorEnvironment> c, HRegionInfo region, ServerName srcServer, ServerName destServer) throws IOException {
+		auditEvent("move", region.getTable().getName(), null, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void postOpen(ObserverContext<RegionCoprocessorEnvironment> ctx) {
+		auditEvent("open", (String) null, null, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void postRestoreSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx, SnapshotDescription snapshot, HTableDescriptor hTableDescriptor) throws IOException {
+		auditEvent("restoreSnapshot", (String) null, null, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void postScannerClose(ObserverContext<RegionCoprocessorEnvironment> c, InternalScanner s) throws IOException {
+		try {
+			scannerOwners.remove(s);
+		} finally {
+			byte[] tableName = getTableName(c.getEnvironment());
+
+			if (!isSpecialTable(tableName)) {
+				auditEvent("scannerClose", tableName, null, null, null, null, getActiveUser(), accessGrantedFlag);
+			}
+		}
+	}
+	@Override
+	public RegionScanner postScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c, Scan scan, RegionScanner s) throws IOException {
+		try {
+			User user = getActiveUser();
+			if (user != null && user.getShortName() != null) {
+				scannerOwners.put(s, user.getShortName());
+			}
+		} finally {
+			byte[] tableName = getTableName(c.getEnvironment());
+
+			if (!isSpecialTable(tableName)) {
+				auditEvent("scannerOpen", tableName, null, null, null, null, getActiveUser(), accessGrantedFlag);
+			}
+		}
+		return s;
+	}
+	@Override
+	public void postSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx, SnapshotDescription snapshot, HTableDescriptor hTableDescriptor) throws IOException {
+		auditEvent("snapshot", hTableDescriptor.getNameAsString(), null, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void postStartMaster(ObserverContext<MasterCoprocessorEnvironment> ctx) throws IOException {
+		if(UpdateRangerPoliciesOnGrantRevoke) {
+			RangerAccessControlLists.init(ctx.getEnvironment().getMasterServices());
+		}
+
+		auditEvent("startMaster", (String) null, null, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void postUnassign(ObserverContext<MasterCoprocessorEnvironment> c, HRegionInfo regionInfo, boolean force) throws IOException {
+		auditEvent("unassign", regionInfo.getTable().getName(), null, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void preAddColumn(ObserverContext<MasterCoprocessorEnvironment> c, TableName tableName, HColumnDescriptor column) throws IOException {
+		requirePermission("addColumn", tableName.getName(), null, null, Action.ADMIN, Action.CREATE);
+	}
+	@Override
+	public Result preAppend(ObserverContext<RegionCoprocessorEnvironment> c, Append append) throws IOException {
+		requirePermission("append", TablePermission.Action.WRITE, c.getEnvironment(), append.getFamilyCellMap());
+		return null;
+	}
+	@Override
+	public void preAssign(ObserverContext<MasterCoprocessorEnvironment> c, HRegionInfo regionInfo) throws IOException {
+		requirePermission("assign", regionInfo.getTable().getName(), null, null, Action.ADMIN);
+	}
+	@Override
+	public void preBalance(ObserverContext<MasterCoprocessorEnvironment> c) throws IOException {
+		requirePermission("balance", null, Permission.Action.ADMIN);
+	}
+	@Override
+	public boolean preBalanceSwitch(ObserverContext<MasterCoprocessorEnvironment> c, boolean newValue) throws IOException {
+		requirePermission("balanceSwitch", null, Permission.Action.ADMIN);
+		return newValue;
+	}
+	@Override
+	public void preBulkLoadHFile(ObserverContext<RegionCoprocessorEnvironment> ctx, List<Pair<byte[], String>> familyPaths) throws IOException {
+		List<byte[]> cfs = new LinkedList<byte[]>();
+		for (Pair<byte[], String> el : familyPaths) {
+			cfs.add(el.getFirst());
+		}
+		requirePermission("bulkLoadHFile", Permission.Action.WRITE, ctx.getEnvironment(), cfs);
+	}
+	@Override
+	public boolean preCheckAndDelete(ObserverContext<RegionCoprocessorEnvironment> c, byte[] row, byte[] family, byte[] qualifier, CompareOp compareOp, ByteArrayComparable comparator, Delete delete, boolean result) throws IOException {
+		Collection<byte[]> familyMap = Arrays.asList(new byte[][] { family });
+		requirePermission("checkAndDelete", TablePermission.Action.READ, c.getEnvironment(), familyMap);
+		requirePermission("checkAndDelete", TablePermission.Action.WRITE, c.getEnvironment(), familyMap);
+		return result;
+	}
+	@Override
+	public boolean preCheckAndPut(ObserverContext<RegionCoprocessorEnvironment> c, byte[] row, byte[] family, byte[] qualifier, CompareOp compareOp, ByteArrayComparable comparator, Put put, boolean result) throws IOException {
+		Collection<byte[]> familyMap = Arrays.asList(new byte[][] { family });
+		requirePermission("checkAndPut", TablePermission.Action.READ, c.getEnvironment(), familyMap);
+		requirePermission("checkAndPut", TablePermission.Action.WRITE, c.getEnvironment(), familyMap);
+		return result;
+	}
+	@Override
+	public void preCloneSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx, SnapshotDescription snapshot, HTableDescriptor hTableDescriptor) throws IOException {
+		requirePermission("cloneSnapshot", null, Permission.Action.ADMIN);
+	}
+	@Override
+	public void preClose(ObserverContext<RegionCoprocessorEnvironment> e, boolean abortRequested) throws IOException {
+		requirePermission("close", getTableName(e.getEnvironment()), Permission.Action.ADMIN);
+	}
+	@Override
+	public InternalScanner preCompact(ObserverContext<RegionCoprocessorEnvironment> e, Store store, InternalScanner scanner,ScanType scanType) throws IOException {
+		requirePermission("compact", getTableName(e.getEnvironment()), null, null, Action.ADMIN, Action.CREATE);
+		return scanner;
+	}
+	@Override
+	public void preCompactSelection(ObserverContext<RegionCoprocessorEnvironment> e, Store store, List<StoreFile> candidates) throws IOException {
+		requirePermission("compactSelection", getTableName(e.getEnvironment()), null, null, Action.ADMIN, Action.CREATE);
+	}
+
+	@Override
+	public void preCreateTable(ObserverContext<MasterCoprocessorEnvironment> c, HTableDescriptor desc, HRegionInfo[] regions) throws IOException {
+		requirePermission("createTable", desc.getName(), Permission.Action.CREATE);
+	}
+	@Override
+	public void preDelete(ObserverContext<RegionCoprocessorEnvironment> c, Delete delete, WALEdit edit, Durability durability) throws IOException {
+		requirePermission("delete", TablePermission.Action.WRITE, c.getEnvironment(), delete.getFamilyCellMap());
+	}
+	@Override
+	public void preDeleteColumn(ObserverContext<MasterCoprocessorEnvironment> c, TableName tableName, byte[] col) throws IOException {
+		requirePermission("deleteColumn", tableName.getName(), null, null, Action.ADMIN, Action.CREATE);
+	}
+	@Override
+	public void preDeleteSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx, SnapshotDescription snapshot) throws IOException {
+		requirePermission("deleteSnapshot", null, Permission.Action.ADMIN);
+	}
+	@Override
+	public void preDeleteTable(ObserverContext<MasterCoprocessorEnvironment> c, TableName tableName) throws IOException {
+		requirePermission("deleteTable", tableName.getName(), null, null, Action.ADMIN, Action.CREATE);
+	}
+	@Override
+	public void preDisableTable(ObserverContext<MasterCoprocessorEnvironment> c, TableName tableName) throws IOException {
+		requirePermission("disableTable", tableName.getName(), null, null, Action.ADMIN, Action.CREATE);
+	}
+	@Override
+	public void preEnableTable(ObserverContext<MasterCoprocessorEnvironment> c, TableName tableName) throws IOException {
+		requirePermission("enableTable", tableName.getName(), null, null, Action.ADMIN, Action.CREATE);
+	}
+	@Override
+	public boolean preExists(ObserverContext<RegionCoprocessorEnvironment> c, Get get, boolean exists) throws IOException {
+		requirePermission("exists", TablePermission.Action.READ, c.getEnvironment(), get.familySet());
+		return exists;
+	}
+	@Override
+	public void preFlush(ObserverContext<RegionCoprocessorEnvironment> e) throws IOException {
+		requirePermission("flush", getTableName(e.getEnvironment()), null, null, Action.ADMIN, Action.CREATE);
+	}
+	@Override
+	public void preGetClosestRowBefore(ObserverContext<RegionCoprocessorEnvironment> c, byte[] row, byte[] family, Result result) throws IOException {
+		requirePermission("getClosestRowBefore", TablePermission.Action.READ, c.getEnvironment(), (family != null ? Lists.newArrayList(family) : null));
+	}
+	@Override
+	public Result preIncrement(ObserverContext<RegionCoprocessorEnvironment> c, Increment increment) throws IOException {
+		requirePermission("increment", TablePermission.Action.WRITE, c.getEnvironment(), increment.getFamilyCellMap().keySet());
+		
+		return null;
+	}
+	@Override
+	public long preIncrementColumnValue(ObserverContext<RegionCoprocessorEnvironment> c, byte[] row, byte[] family, byte[] qualifier, long amount, boolean writeToWAL) throws IOException {
+		requirePermission("incrementColumnValue", TablePermission.Action.READ, c.getEnvironment(), Arrays.asList(new byte[][] { family }));
+		requirePermission("incrementColumnValue", TablePermission.Action.WRITE, c.getEnvironment(), Arrays.asList(new byte[][] { family }));
+		return -1;
+	}
+	@Override
+	public void preModifyColumn(ObserverContext<MasterCoprocessorEnvironment> c, TableName tableName, HColumnDescriptor descriptor) throws IOException {
+		requirePermission("modifyColumn", tableName.getName(), null, null, Action.ADMIN, Action.CREATE);
+	}
+	@Override
+	public void preModifyTable(ObserverContext<MasterCoprocessorEnvironment> c, TableName tableName, HTableDescriptor htd) throws IOException {
+		requirePermission("modifyTable", tableName.getName(), null, null, Action.ADMIN, Action.CREATE);
+	}
+	@Override
+	public void preMove(ObserverContext<MasterCoprocessorEnvironment> c, HRegionInfo region, ServerName srcServer, ServerName destServer) throws IOException {
+		requirePermission("move", region.getTable().getName() , null, null, Action.ADMIN);
+	}
+	@Override
+	public void preOpen(ObserverContext<RegionCoprocessorEnvironment> e) throws IOException {
+		RegionCoprocessorEnvironment env = e.getEnvironment();
+		final HRegion region = env.getRegion();
+		if (region == null) {
+			LOG.error("NULL region from RegionCoprocessorEnvironment in preOpen()");
+			return;
+		} else {
+			HRegionInfo regionInfo = region.getRegionInfo();
+			if (isSpecialTable(regionInfo)) {
+				isSystemOrSuperUser(regionEnv.getConfiguration());
+			} else {
+				requirePermission("open", getTableName(e.getEnvironment()), Action.ADMIN);
+			}
+		}
+	}
+	@Override
+	public void preRestoreSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx, SnapshotDescription snapshot, HTableDescriptor hTableDescriptor) throws IOException {
+		requirePermission("restoreSnapshot", hTableDescriptor.getName(), Permission.Action.ADMIN);
+	}
+
+	@Override
+	public void preScannerClose(ObserverContext<RegionCoprocessorEnvironment> c, InternalScanner s) throws IOException {
+		requireScannerOwner(s);
+	}
+	@Override
+	public boolean preScannerNext(ObserverContext<RegionCoprocessorEnvironment> c, InternalScanner s, List<Result> result, int limit, boolean hasNext) throws IOException {
+		requireScannerOwner(s);
+		return hasNext;
+	}
+	@Override
+	public RegionScanner preScannerOpen(ObserverContext<RegionCoprocessorEnvironment> c, Scan scan, RegionScanner s) throws IOException {
+		RegionCoprocessorEnvironment e = c.getEnvironment();
+		User user = getActiveUser();
+		boolean isGranted = isPermissionGranted("scannerOpen", user, TablePermission.Action.READ, e, scan.getFamilyMap());
+		if (!isGranted) {
+			if (hasFamilyQualifierPermission(user, TablePermission.Action.READ, e, scan.getFamilyMap())) {
+				byte[] table = getTableName(e);
+				RangerAccessControlFilter filter = new RangerAccessControlFilter(user, table);
+				if (scan.hasFilter()) {
+					FilterList wrapper = new FilterList(FilterList.Operator.MUST_PASS_ALL, Lists.newArrayList(filter, scan.getFilter()));
+					scan.setFilter(wrapper);
+				} else {
+					scan.setFilter(filter);
+				}
+			} else {
+				throw new AccessDeniedException("Insufficient permissions for user '" + (user != null ? user.getShortName() : "null") + "' for scanner open on table " + Bytes.toString(getTableName(e)));
+			}
+		}
+		return s;
+	}
+	@Override
+	public void preShutdown(ObserverContext<MasterCoprocessorEnvironment> c) throws IOException {
+		requirePermission("shutdown", null, Permission.Action.ADMIN);
+	}
+	@Override
+	public void preSnapshot(ObserverContext<MasterCoprocessorEnvironment> ctx, SnapshotDescription snapshot, HTableDescriptor hTableDescriptor) throws IOException {
+		requirePermission("snapshot", hTableDescriptor.getName(), Permission.Action.ADMIN);
+	}
+	@Override
+	public void preSplit(ObserverContext<RegionCoprocessorEnvironment> e) throws IOException {
+		requirePermission("split", getTableName(e.getEnvironment()), null, null, Action.ADMIN);
+	}
+	@Override
+	public void preStopMaster(ObserverContext<MasterCoprocessorEnvironment> c) throws IOException {
+		requirePermission("stopMaster", null, Permission.Action.ADMIN);
+	}
+	@Override
+	public void preStopRegionServer(ObserverContext<RegionServerCoprocessorEnvironment> env) throws IOException {
+		requirePermission("stop", null, Permission.Action.ADMIN);
+	}
+	@Override
+	public void preUnassign(ObserverContext<MasterCoprocessorEnvironment> c, HRegionInfo regionInfo, boolean force) throws IOException {
+		requirePermission("unassign", regionInfo.getTable().getName(), null, null, Action.ADMIN);
+	}
+	private String coprocessorType = "unknown";
+	private static final String MASTER_COPROCESSOR_TYPE = "master";
+	private static final String REGIONAL_COPROCESSOR_TYPE = "regional";
+	private static final String REGIONAL_SERVER_COPROCESSOR_TYPE = "regionalServer";
+	@Override
+	public void start(CoprocessorEnvironment env) throws IOException {
+		AuditProviderFactory.ApplicationType appType = AuditProviderFactory.ApplicationType.Unknown;
+
+		if (env instanceof MasterCoprocessorEnvironment) {
+			coprocessorType = MASTER_COPROCESSOR_TYPE;
+			appType = AuditProviderFactory.ApplicationType.HBaseMaster;
+		} else if (env instanceof RegionServerCoprocessorEnvironment) {
+			coprocessorType = REGIONAL_SERVER_COPROCESSOR_TYPE;
+			appType = AuditProviderFactory.ApplicationType.HBaseRegionalServer;
+		} else if (env instanceof RegionCoprocessorEnvironment) {
+			regionEnv = (RegionCoprocessorEnvironment) env;
+			coprocessorType = REGIONAL_COPROCESSOR_TYPE;
+			appType = AuditProviderFactory.ApplicationType.HBaseRegionalServer;
+		}
+
+		RangerConfiguration.getInstance().initAudit(appType);
+
+		if (superUserList == null) {
+			superUserList = new ArrayList<String>();
+			Configuration conf = env.getConfiguration();
+			String[] users = conf.getStrings(SUPERUSER_CONFIG_PROP);
+			if (users != null) {
+				for (String user : users) {
+					user = user.trim();
+					LOG.info("Start() - Adding Super User(" + user + ")");
+					superUserList.add(user);
+				}
+			}
+		}
+		if (LOG.isDebugEnabled()) {
+			LOG.debug("Start of Coprocessor: [" + coprocessorType + "] with superUserList [" + superUserList + "]");
+		}
+	}
+	@Override
+	public void stop(CoprocessorEnvironment env) {
+	}
+	@Override
+	public void prePut(ObserverContext<RegionCoprocessorEnvironment> c, Put put, WALEdit edit, Durability durability) throws IOException {
+		requirePermission("put", TablePermission.Action.WRITE, c.getEnvironment(), put.getFamilyCellMap());
+	}
+	
+	@Override
+	public void postPut(ObserverContext<RegionCoprocessorEnvironment> c, Put put, WALEdit edit, Durability durability) {
+		byte[] tableName = getTableName(c.getEnvironment());
+		if (!isSpecialTable(tableName)) {
+			if (accessController.isAudited(tableName)) {
+				Map<byte[], List<Cell>> colf2KeyValMap = put.getFamilyCellMap() ;
+				for (byte[] colf : colf2KeyValMap.keySet()) {
+					if (colf != null) {
+						List<Cell> kvList = colf2KeyValMap.get(colf);
+						for (Cell kv : kvList) {
+							auditEvent("Put", tableName, CellUtil.cloneFamily(kv),   CellUtil.cloneQualifier(kv) , CellUtil.cloneRow(kv), CellUtil.cloneValue(kv), getActiveUser(), accessGrantedFlag);
+						}
+					}
+				}
+
+				
+			}
+		}
+	}
+
+	@Override
+	public void preGetOp(final ObserverContext<RegionCoprocessorEnvironment> rEnv, final Get get, final List<Cell> result) throws IOException {
+		RegionCoprocessorEnvironment e = rEnv.getEnvironment();
+		User requestUser = getActiveUser();
+
+
+		if (LOG.isDebugEnabled())
+		{
+			StringBuilder fields = new StringBuilder() ;
+			Map<byte[], NavigableSet<byte[]>> familyMap = get.getFamilyMap() ;
+			if (familyMap != null && familyMap.size() > 0) {
+				for(byte[] columnfamily : familyMap.keySet() ) {
+					if (columnfamily != null && columnfamily.length > 0) {
+						NavigableSet<byte[]> columnNameSet = familyMap.get(columnfamily) ;
+						if (columnNameSet != null && columnNameSet.size() > 0) {
+	 						for(byte[] columnname : columnNameSet) {
+								fields.append("Field[" + Bytes.toString(columnfamily) + ":" + Bytes.toString(columnname) + "],") ;
+							}
+						}
+						else {
+							fields.append("Field[" + Bytes.toString(columnfamily) + ":null],") ;
+						}
+					}
+				}
+			}
+			else {
+				if (familyMap == null){
+					fields.append("{null}") ;
+				}
+				else {
+					fields.append("{empty}") ;
+				}
+			}
+			LOG.debug("preGet is checking permission for the following fields: {" + fields.toString() + "}");
+		}
+		
+		boolean isPermGranted = isPermissionGranted("get", requestUser, TablePermission.Action.READ, e, get.getFamilyMap());
+		
+		if (!isPermGranted) {
+			isPermGranted = hasFamilyQualifierPermission(requestUser, TablePermission.Action.READ, e, get.getFamilyMap());
+			if (isPermGranted) {
+				byte[] table = getTableName(e);
+				RangerAccessControlFilter filter = new RangerAccessControlFilter(requestUser, table);
+				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);
+				}
+			} else {
+				throw new AccessDeniedException("Insufficient permissions (table=" + e.getRegion().getTableDesc().getNameAsString() + ", action=READ)");
+			}
+		}
+	}
+	@Override
+	public void postGetOp(final ObserverContext<RegionCoprocessorEnvironment> env, final Get get, final List<Cell> results) throws IOException {
+		HRegionInfo hri = env.getEnvironment().getRegion().getRegionInfo();
+		
+		byte[] tableName = hri.getTable().getName() ;
+		
+		if (!isSpecialTable(tableName)) {
+			try {
+				if (accessController.isAudited(tableName)) {
+					for (Cell cell : results) {
+						auditEvent("Get", tableName, cell.getFamily(), cell.getQualifier(), cell.getRow(), cell.getValue(), getActiveUser(), accessGrantedFlag);
+					}
+				}
+			} catch (Throwable t) {
+			}
+		}
+	}
+
+	@Override
+	public void preRegionOffline(ObserverContext<MasterCoprocessorEnvironment> c, HRegionInfo regionInfo) throws IOException {
+	    requirePermission("regionOffline", regionInfo.getTable().getName(), null, null, Action.ADMIN);
+	}
+	@Override
+	public void postRegionOffline(ObserverContext<MasterCoprocessorEnvironment> c, HRegionInfo regionInfo) throws IOException {
+		auditEvent("regionOffline", regionInfo.getTable().getName(), null, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+	@Override
+	public void preCreateNamespace(ObserverContext<MasterCoprocessorEnvironment> ctx, NamespaceDescriptor ns) throws IOException {
+		requireGlobalPermission("createNamespace", ns.getName(), Action.ADMIN);
+	}
+	@Override
+	public void postCreateNamespace(ObserverContext<MasterCoprocessorEnvironment> ctx, NamespaceDescriptor ns) throws IOException {
+		if (accessController.isAudited(WILDCARD_MATCH)) {
+			auditEvent("createNamespace", ns.getName(), null, null, null, null, getActiveUser(), accessGrantedFlag);
+		}
+	}
+	@Override
+	public void preDeleteNamespace(ObserverContext<MasterCoprocessorEnvironment> ctx, String namespace) throws IOException {
+		requireGlobalPermission("deleteNamespace", namespace, Action.ADMIN);
+	}
+	@Override
+	public void postDeleteNamespace(ObserverContext<MasterCoprocessorEnvironment> ctx, String namespace) throws IOException {
+		if (accessController.isAudited(WILDCARD_MATCH)) {
+			auditEvent("deleteNamespace", namespace, null, null, null, null, getActiveUser(), accessGrantedFlag);
+		}
+	}
+	@Override
+	public void preModifyNamespace(ObserverContext<MasterCoprocessorEnvironment> ctx, NamespaceDescriptor ns) throws IOException {
+		requireGlobalPermission("modifyNamespace", ns.getName(), Action.ADMIN);
+	}
+	@Override
+	public void postModifyNamespace(ObserverContext<MasterCoprocessorEnvironment> ctx, NamespaceDescriptor ns) throws IOException {
+		if (accessController.isAudited(WILDCARD_MATCH)) {
+			auditEvent("modifyNamespace", ns.getName(), null, null, null, null, getActiveUser(), accessGrantedFlag);
+		}
+	}
+	@Override
+	public void preGetTableDescriptors(ObserverContext<MasterCoprocessorEnvironment> ctx, List<TableName> tableNamesList,  List<HTableDescriptor> descriptors) throws IOException {
+		if (tableNamesList == null || tableNamesList.isEmpty()) { // If the list is empty, this is a request for all table descriptors and requires GLOBAL ADMIN privs.
+			requireGlobalPermission("getTableDescriptors", WILDCARD, Action.ADMIN);
+		} else { // Otherwise, if the requestor has ADMIN or CREATE privs for all listed tables, the request can be granted.
+			for (TableName tableName: tableNamesList) {
+				requirePermission("getTableDescriptors", tableName.getName(), null, null, Action.ADMIN, Action.CREATE);
+			}
+		}
+	}
+	@Override
+	public void postGetTableDescriptors(ObserverContext<MasterCoprocessorEnvironment> ctx, List<HTableDescriptor> descriptors) throws IOException {
+		if (descriptors == null || descriptors.isEmpty()) { // If the list is empty, this is a request for all table descriptors and requires GLOBAL ADMIN privs.
+			auditEvent("getTableDescriptors", WILDCARD, null, null, null, null, getActiveUser(), accessGrantedFlag);
+		} else { // Otherwise, if the requestor has ADMIN or CREATE privs for all listed tables, the request can be granted.
+			for (HTableDescriptor descriptor : descriptors) {
+				auditEvent("getTableDescriptors", descriptor.getName(), null, null, null, null, getActiveUser(), accessGrantedFlag);
+			}
+		}
+	}
+	@Override
+	public void preMerge(ObserverContext<RegionServerCoprocessorEnvironment> ctx, HRegion regionA, HRegion regionB) throws IOException {
+		requirePermission("mergeRegions", regionA.getTableDesc().getTableName().getName(), null, null, Action.ADMIN);
+	}
+
+	@Override
+	public void postMerge(ObserverContext<RegionServerCoprocessorEnvironment> c, HRegion regionA, HRegion regionB, HRegion mergedRegion) throws IOException {
+		auditEvent("mergeRegions", regionA.getTableDesc().getTableName().getName(), null, null, null, null, getActiveUser(), accessGrantedFlag);
+	}
+
+	public void prePrepareBulkLoad(ObserverContext<RegionCoprocessorEnvironment> ctx, PrepareBulkLoadRequest request) throws IOException {
+		List<byte[]> cfs = null;
+
+		requirePermission("prePrepareBulkLoad", Permission.Action.WRITE, ctx.getEnvironment(), cfs);
+	}
+
+	public void preCleanupBulkLoad(ObserverContext<RegionCoprocessorEnvironment> ctx, CleanupBulkLoadRequest request) throws IOException {
+		List<byte[]> cfs = null;
+
+		requirePermission("preCleanupBulkLoad", Permission.Action.WRITE, ctx.getEnvironment(), cfs);
+	}
+	
+	private void auditEvent(String eventName, byte[] tableName, byte[] columnFamilyName, byte[] qualifierName, byte[] row, byte[] value, User user, short accessFlag) {
+		auditEvent(eventName, Bytes.toString(tableName), Bytes.toString(columnFamilyName), Bytes.toString(qualifierName), row, value, user, accessFlag);
+	}
+	
+	private void auditEvent(String eventName, String tableName, String columnFamilyName, String qualifierName, byte[] row, byte[] value, User user, short accessFlag) {
+		
+		if (tableName != null && accessController.isAudited(tableName.getBytes())) {
+			
+			String resourceType = "table";
+			String resourceName = tableName;
+			if (columnFamilyName != null && columnFamilyName.length() > 0) {
+				resourceName += "/" + columnFamilyName;
+				resourceType = "columnFamily";
+			}
+			if (qualifierName != null && qualifierName.length() > 0) {
+				resourceName += "/" + qualifierName;
+				resourceType = "column";
+			}
+			
+			HBaseAuditEvent auditEvent = new HBaseAuditEvent();
+
+			auditEvent.setAclEnforcer(RangerModuleName);
+			auditEvent.setResourceType(resourceType);
+			auditEvent.setResourcePath(resourceName);
+			auditEvent.setAction(eventName);
+			auditEvent.setAccessType(eventName);
+			auditEvent.setUser(user == null ? RangerHadoopConstants.AUDITLOG_EMPTY_STRING  : user.getShortName());
+			auditEvent.setAccessResult(accessFlag);
+			auditEvent.setClientIP(getRemoteAddress());
+			auditEvent.setEventTime(getUTCDate());
+			auditEvent.setRepositoryType(EnumRepositoryType.HBASE);
+			auditEvent.setRepositoryName(repositoryName);
+			
+			try {
+				if (LOG.isDebugEnabled()) {
+					LOG.debug("Writing audit log [" + auditEvent + "] - START.");
+				}
+				AuditProviderFactory.getAuditProvider().log(auditEvent);
+				if (LOG.isDebugEnabled()) {
+					LOG.debug("Writing audit log [" + auditEvent + "] - END.");
+				}
+			}
+			catch(Throwable t) {
+				LOG.error("ERROR during audit log [" + auditEvent + "]", t);
+			}
+			
+		}
+	}
+	
+	public static Date getUTCDate() {
+		Calendar local=Calendar.getInstance();
+	    int offset = local.getTimeZone().getOffset(local.getTimeInMillis());
+	    GregorianCalendar utc = new GregorianCalendar(gmtTimeZone);
+	    utc.setTimeInMillis(local.getTimeInMillis());
+	    utc.add(Calendar.MILLISECOND, -offset);
+	    return utc.getTime();
+	}
+	
+	@Override
+	public void grant(RpcController controller, AccessControlProtos.GrantRequest request, RpcCallback<AccessControlProtos.GrantResponse> done) {
+		boolean isSuccess = false;
+
+		if(UpdateRangerPoliciesOnGrantRevoke) {
+			GrantRevokeData grData = null;
+	
+			try {
+				grData = createGrantData(request);
+	
+				RangerAdminRESTClient xaAdmin = new RangerAdminRESTClient();
+	
+			    xaAdmin.grantPrivilege(grData);
+	
+			    isSuccess = true;
+			} catch(IOException excp) {
+				LOG.warn("grant() failed", excp);
+	
+				ResponseConverter.setControllerException(controller, excp);
+			} catch (Exception excp) {
+				LOG.warn("grant() failed", excp);
+	
+				ResponseConverter.setControllerException(controller, new CoprocessorException(excp.getMessage()));
+			} finally {
+				byte[] tableName = grData == null ? null : StringUtil.getBytes(grData.getTables());
+	
+				if(accessController.isAudited(tableName)) {
+					byte[] colFamily = grData == null ? null : StringUtil.getBytes(grData.getColumnFamilies());
+					byte[] qualifier = grData == null ? null : StringUtil.getBytes(grData.getColumns());
+	
+					// Note: failed return from REST call will be logged as 'DENIED'
+					auditEvent("grant", tableName, colFamily, qualifier, null, null, getActiveUser(), isSuccess ? accessGrantedFlag : accessDeniedFlag);
+				}
+			}
+		}
+
+		AccessControlProtos.GrantResponse response = isSuccess ? AccessControlProtos.GrantResponse.getDefaultInstance() : null;
+
+		done.run(response);
+	}
+
+	@Override
+	public void revoke(RpcController controller, AccessControlProtos.RevokeRequest request, RpcCallback<AccessControlProtos.RevokeResponse> done) {
+		boolean isSuccess = false;
+
+		if(UpdateRangerPoliciesOnGrantRevoke) {
+			GrantRevokeData grData = null;
+	
+			try {
+				grData = createRevokeData(request);
+	
+				RangerAdminRESTClient xaAdmin = new RangerAdminRESTClient();
+	
+			    xaAdmin.revokePrivilege(grData);
+	
+			    isSuccess = true;
+			} catch(IOException excp) {
+				LOG.warn("revoke() failed", excp);
+	
+				ResponseConverter.setControllerException(controller, excp);
+			} catch (Exception excp) {
+				LOG.warn("revoke() failed", excp);
+	
+				ResponseConverter.setControllerException(controller, new CoprocessorException(excp.getMessage()));
+			} finally {
+				byte[] tableName = grData == null ? null : StringUtil.getBytes(grData.getTables());
+	
+				if(accessController.isAudited(tableName)) {
+					byte[] colFamily = grData == null ? null : StringUtil.getBytes(grData.getColumnFamilies());
+					byte[] qualifier = grData == null ? null : StringUtil.getBytes(grData.getColumns());
+	
+					// Note: failed return from REST call will be logged as 'DENIED'
+					auditEvent("revoke", tableName, colFamily, qualifier, null, null, getActiveUser(), isSuccess ? accessGrantedFlag : accessDeniedFlag);
+				}
+			}
+		}
+
+		AccessControlProtos.RevokeResponse response = isSuccess ? AccessControlProtos.RevokeResponse.getDefaultInstance() : null;
+
+		done.run(response);
+	}
+
+	@Override
+	public void checkPermissions(RpcController controller, AccessControlProtos.CheckPermissionsRequest request, RpcCallback<AccessControlProtos.CheckPermissionsResponse> done) {
+		LOG.debug("checkPermissions(): ");
+	}
+
+	@Override
+	public void getUserPermissions(RpcController controller, AccessControlProtos.GetUserPermissionsRequest request, RpcCallback<AccessControlProtos.GetUserPermissionsResponse> done) {
+		LOG.debug("getUserPermissions(): ");
+	}
+
+	@Override
+	public Service getService() {
+	    return AccessControlProtos.AccessControlService.newReflectiveService(this);
+	}
+
+	private GrantRevokeData createGrantData(AccessControlProtos.GrantRequest request) throws Exception {
+		org.apache.hadoop.hbase.protobuf.generated.AccessControlProtos.UserPermission up   = request.getUserPermission();
+		org.apache.hadoop.hbase.protobuf.generated.AccessControlProtos.Permission     perm = up == null ? null : up.getPermission();
+
+		UserPermission      userPerm  = up == null ? null : ProtobufUtil.toUserPermission(up);
+		Permission.Action[] actions   = userPerm == null ? null : userPerm.getActions();
+		String              userName  = userPerm == null ? null : Bytes.toString(userPerm.getUser());
+		String              tableName = null;
+		String              colFamily = null;
+		String              qualifier = null;
+
+		if(perm == null) {
+			throw new Exception("grant(): invalid data - permission is null");
+		}
+
+		if(StringUtil.isEmpty(userName)) {
+			throw new Exception("grant(): invalid data - username empty");
+		}
+
+		if ((actions == null) || (actions.length == 0)) {
+			throw new Exception("grant(): invalid data - no action specified");
+		}
+
+		switch(perm.getType()) {
+			case Global:
+				tableName = colFamily = qualifier = "*";
+			break;
+
+			case Table:
+				tableName = Bytes.toString(userPerm.getTableName().getName());
+				colFamily = Bytes.toString(userPerm.getFamily());
+				qualifier = Bytes.toString(userPerm.getQualifier());
+			break;
+
+			case Namespace:
+			default:
+				LOG.warn("grant(): ignoring type '" + perm.getType().name() + "'");
+			break;
+		}
+		
+		if(StringUtil.isEmpty(tableName) && StringUtil.isEmpty(colFamily) && StringUtil.isEmpty(qualifier)) {
+			throw new Exception("grant(): table/columnFamily/columnQualifier not specified");
+		}
+
+		PermMap permMap = new PermMap();
+
+		if(userName.startsWith(GROUP_PREFIX)) {
+			permMap.addGroup(userName.substring(GROUP_PREFIX.length()));
+		} else {
+			permMap.addUser(userName);
+		}
+
+		for (int i = 0; i < actions.length; i++) {
+			switch(actions[i].code()) {
+				case 'R':
+				case 'W':
+				case 'C':
+				case 'A':
+					permMap.addPerm(actions[i].name());
+				break;
+
+				default:
+					LOG.warn("grant(): ignoring action '" + actions[i].name() + "' for user '" + userName + "'");
+			}
+		}
+
+		User   activeUser = getActiveUser();
+		String grantor    = activeUser != null ? activeUser.getShortName() : null;
+
+		GrantRevokeData grData = new GrantRevokeData();
+
+		grData.setHBaseData(grantor, repositoryName,  tableName,  qualifier, colFamily, permMap);
+
+		return grData;
+	}
+
+	private GrantRevokeData createRevokeData(AccessControlProtos.RevokeRequest request) throws Exception {
+		org.apache.hadoop.hbase.protobuf.generated.AccessControlProtos.UserPermission up   = request.getUserPermission();
+		org.apache.hadoop.hbase.protobuf.generated.AccessControlProtos.Permission     perm = up == null ? null : up.getPermission();
+
+		UserPermission      userPerm  = up == null ? null : ProtobufUtil.toUserPermission(up);
+		String              userName  = userPerm == null ? null : Bytes.toString(userPerm.getUser());
+		String              tableName = null;
+		String              colFamily = null;
+		String              qualifier = null;
+
+		if(perm == null) {
+			throw new Exception("revoke(): invalid data - permission is null");
+		}
+
+		if(StringUtil.isEmpty(userName)) {
+			throw new Exception("revoke(): invalid data - username empty");
+		}
+
+		switch(perm.getType()) {
+			case Global :
+				tableName = colFamily = qualifier = "*";
+			break;
+
+			case Table :
+				tableName = Bytes.toString(userPerm.getTableName().getName());
+				colFamily = Bytes.toString(userPerm.getFamily());
+				qualifier = Bytes.toString(userPerm.getQualifier());
+			break;
+
+			case Namespace:
+			default:
+				LOG.warn("revoke(): ignoring type '" + perm.getType().name() + "'");
+			break;
+		}
+		
+		if(StringUtil.isEmpty(tableName) && StringUtil.isEmpty(colFamily) && StringUtil.isEmpty(qualifier)) {
+			throw new Exception("revoke(): table/columnFamily/columnQualifier not specified");
+		}
+
+		PermMap permMap = new PermMap();
+
+		if(userName.startsWith(GROUP_PREFIX)) {
+			permMap.addGroup(userName.substring(GROUP_PREFIX.length()));
+		} else {
+			permMap.addUser(userName);
+		}
+
+		// revoke removes all permissions
+		permMap.addPerm(Permission.Action.READ.name());
+		permMap.addPerm(Permission.Action.WRITE.name());
+		permMap.addPerm(Permission.Action.CREATE.name());
+		permMap.addPerm(Permission.Action.ADMIN.name());
+
+		User   activeUser = getActiveUser();
+		String grantor    = activeUser != null ? activeUser.getShortName() : null;
+
+		GrantRevokeData grData = new GrantRevokeData();
+
+		grData.setHBaseData(grantor, repositoryName,  tableName,  qualifier, colFamily, permMap);
+
+		return grData;
+	}
+}