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/**
* 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.hadoop.hbase.security.visibility;
import java.io.IOException;
import java.util.List;
import org.apache.hadoop.conf.Configurable;
import org.apache.hadoop.hbase.Tag;
import org.apache.hadoop.hbase.TagType;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.classification.InterfaceStability;
import org.apache.hadoop.hbase.coprocessor.RegionCoprocessorEnvironment;
import org.apache.hadoop.hbase.regionserver.OperationStatus;
/**
* The interface which deals with visibility labels and user auths admin service as well as the cell
* visibility expression storage part and read time evaluation.
*/
@InterfaceAudience.Public
@InterfaceStability.Evolving
public interface VisibilityLabelService extends Configurable {
/**
* System calls this after opening of regions. Gives a chance for the VisibilityLabelService to so
* any initialization logic.
* @param e
* the region coprocessor env
*/
void init(RegionCoprocessorEnvironment e) throws IOException;
/**
* Adds the set of labels into the system.
* @param labels
* Labels to add to the system.
* @return OperationStatus for each of the label addition
*/
OperationStatus[] addLabels(List labels) throws IOException;
/**
* Sets given labels globally authorized for the user.
* @param user
* The authorizing user
* @param authLabels
* Labels which are getting authorized for the user
* @return OperationStatus for each of the label auth addition
*/
OperationStatus[] setAuths(byte[] user, List authLabels) throws IOException;
/**
* Removes given labels from user's globally authorized list of labels.
* @param user
* The user whose authorization to be removed
* @param authLabels
* Labels which are getting removed from authorization set
* @return OperationStatus for each of the label auth removal
*/
OperationStatus[] clearAuths(byte[] user, List authLabels) throws IOException;
/**
* @param user
* Name of the user whose authorization to be retrieved
* @param systemCall
* Whether a system or user originated call.
* @return Visibility labels authorized for the given user.
*/
List getAuths(byte[] user, boolean systemCall) throws IOException;
/**
* Creates tags corresponding to given visibility expression.
*
* Note: This will be concurrently called from multiple threads and implementation should
* take care of thread safety.
* @param visExpression The Expression for which corresponding Tags to be created.
* @param withSerializationFormat specifies whether a tag, denoting the serialization version
* of the tags, to be added in the list. When this is true make sure to add the
* serialization format Tag also. The format tag value should be byte type.
* @param checkAuths denotes whether to check individual labels in visExpression against user's
* global auth label.
* @return The list of tags corresponds to the visibility expression. These tags will be stored
* along with the Cells.
*/
List createVisibilityExpTags(String visExpression, boolean withSerializationFormat,
boolean checkAuths) throws IOException;
/**
* Creates VisibilityExpEvaluator corresponding to given Authorizations.
* Note: This will be concurrently called from multiple threads and implementation should take
* care of thread safety.
* @param authorizations
* Authorizations for the read request
* @return The VisibilityExpEvaluator corresponding to the given set of authorization labels.
*/
VisibilityExpEvaluator getVisibilityExpEvaluator(Authorizations authorizations)
throws IOException;
/**
* System checks for user auth during admin operations. (ie. Label add, set/clear auth). The
* operation is allowed only for users having system auth. Also during read, if the requesting
* user has system auth, he can view all the data irrespective of its labels.
* @param user
* User for whom system auth check to be done.
* @return true if the given user is having system/super auth
*/
boolean havingSystemAuth(byte[] user) throws IOException;
/**
* System uses this for deciding whether a Cell can be deleted by matching visibility expression
* in Delete mutation and the cell in consideration. Also system passes the serialization format
* of visibility tags in Put and Delete.
* Note: This will be concurrently called from multiple threads and implementation should take
* care of thread safety.
* @param putVisTags
* The visibility tags present in the Put mutation
* @param putVisTagFormat
* The serialization format for the Put visibility tags. A null value for
* this format means the tags are written with unsorted label ordinals
* @param deleteVisTags
* - The visibility tags in the delete mutation (the specified Cell Visibility)
* @param deleteVisTagFormat
* The serialization format for the Delete visibility tags. A null value for
* this format means the tags are written with unsorted label ordinals
* @return true if matching tags are found
* @see VisibilityConstants#SORTED_ORDINAL_SERIALIZATION_FORMAT
*/
boolean matchVisibility(List putVisTags, Byte putVisTagFormat, List deleteVisTags,
Byte deleteVisTagFormat) throws IOException;
/**
* Provides a way to modify the visibility tags of type {@link TagType}
* .VISIBILITY_TAG_TYPE, that are part of the cell created from the WALEdits
* that are prepared for replication while calling
* {@link org.apache.hadoop.hbase.replication.ReplicationEndpoint}
* .replicate().
* {@link org.apache.hadoop.hbase.security.visibility.VisibilityReplicationEndpoint}
* calls this API to provide an opportunity to modify the visibility tags
* before replicating.
*
* @param visTags
* the visibility tags associated with the cell
* @param serializationFormat
* the serialization format associated with the tag
* @return the modified visibility expression in the form of byte[]
* @throws IOException
*/
byte[] encodeVisibilityForReplication(final List visTags,
final Byte serializationFormat) throws IOException;
}