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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.access;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.TableName;
import org.apache.yetus.audience.InterfaceAudience;
import org.apache.hadoop.hbase.util.Bytes;
/**
* Represents an authorization for access for the given actions, optionally
* restricted to the given column family or column qualifier, over the
* given table. If the family property is null, it implies
* full table access.
*/
@InterfaceAudience.Public
public class TablePermission extends Permission {
private TableName table;
private byte[] family;
private byte[] qualifier;
/**
* Construct a table:family:qualifier permission.
* @param table table name
* @param family family name
* @param qualifier qualifier name
* @param assigned assigned actions
*/
TablePermission(TableName table, byte[] family, byte[] qualifier, Action... assigned) {
super(assigned);
this.table = table;
this.family = family;
this.qualifier = qualifier;
this.scope = Scope.TABLE;
}
public TableName getTableName() {
return table;
}
public boolean hasFamily() {
return family != null;
}
public byte[] getFamily() {
return family;
}
public boolean hasQualifier() {
return qualifier != null;
}
public byte[] getQualifier() {
return qualifier;
}
public String getNamespace() {
return table.getNamespaceAsString();
}
/**
* Check if given action can performs on given table:family:qualifier.
* @param table table name
* @param family family name
* @param qualifier qualifier name
* @param action one of [Read, Write, Create, Exec, Admin]
* @return true if can, false otherwise
*/
public boolean implies(TableName table, byte[] family, byte[] qualifier, Action action) {
if (failCheckTable(table)) {
return false;
}
if (failCheckFamily(family)) {
return false;
}
if (failCheckQualifier(qualifier)) {
return false;
}
return implies(action);
}
/**
* Check if given action can performs on given table:family.
* @param table table name
* @param family family name
* @param action one of [Read, Write, Create, Exec, Admin]
* @return true if can, false otherwise
*/
public boolean implies(TableName table, byte[] family, Action action) {
if (failCheckTable(table)) {
return false;
}
if (failCheckFamily(family)) {
return false;
}
return implies(action);
}
private boolean failCheckTable(TableName table) {
return this.table == null || !this.table.equals(table);
}
private boolean failCheckFamily(byte[] family) {
return this.family != null && (family == null || !Bytes.equals(this.family, family));
}
private boolean failCheckQualifier(byte[] qual) {
return this.qualifier != null && (qual == null || !Bytes.equals(this.qualifier, qual));
}
/**
* Checks if this permission grants access to perform the given action on
* the given table and key value.
* @param table the table on which the operation is being performed
* @param kv the KeyValue on which the operation is being requested
* @param action the action requested
* @return true if the action is allowed over the given scope
* by this permission, otherwise false
*/
public boolean implies(TableName table, KeyValue kv, Action action) {
if (failCheckTable(table)) {
return false;
}
if (family != null && !(CellUtil.matchingFamily(kv, family))) {
return false;
}
if (qualifier != null && !(CellUtil.matchingQualifier(kv, qualifier))) {
return false;
}
// check actions
return super.implies(action);
}
/**
* Check if fields of table in table permission equals.
* @param tp to be checked table permission
* @return true if equals, false otherwise
*/
public boolean tableFieldsEqual(TablePermission tp) {
if (tp == null) {
return false;
}
boolean tEq = (table == null && tp.table == null) || (table != null && table.equals(tp.table));
boolean fEq = (family == null && tp.family == null) || Bytes.equals(family, tp.family);
boolean qEq = (qualifier == null && tp.qualifier == null) ||
Bytes.equals(qualifier, tp.qualifier);
return tEq && fEq && qEq;
}
@Override
public boolean equalsExceptActions(Object obj) {
if (!(obj instanceof TablePermission)) {
return false;
}
TablePermission other = (TablePermission) obj;
return tableFieldsEqual(other);
}
@Override
public boolean equals(Object obj) {
return equalsExceptActions(obj) && super.equals(obj);
}
@Override
public int hashCode() {
final int prime = 37;
int result = super.hashCode();
if (table != null) {
result = prime * result + table.hashCode();
}
if (family != null) {
result = prime * result + Bytes.hashCode(family);
}
if (qualifier != null) {
result = prime * result + Bytes.hashCode(qualifier);
}
return result;
}
@Override
public String toString() {
return "[TablePermission: " + rawExpression() + "]";
}
@Override
protected String rawExpression() {
StringBuilder raw = new StringBuilder();
if (table != null) {
raw.append("table=").append(table)
.append(", family=").append(family == null ? null : Bytes.toString(family))
.append(", qualifier=").append(qualifier == null ? null : Bytes.toString(qualifier))
.append(", ");
}
return raw.toString() + super.rawExpression();
}
@Override
public void readFields(DataInput in) throws IOException {
super.readFields(in);
byte[] tableBytes = Bytes.readByteArray(in);
if(tableBytes.length > 0) {
table = TableName.valueOf(tableBytes);
}
if (in.readBoolean()) {
family = Bytes.readByteArray(in);
}
if (in.readBoolean()) {
qualifier = Bytes.readByteArray(in);
}
}
@Override
public void write(DataOutput out) throws IOException {
super.write(out);
// Explicitly writing null to maintain se/deserialize backward compatibility.
Bytes.writeByteArray(out, table == null ? null : table.getName());
out.writeBoolean(family != null);
if (family != null) {
Bytes.writeByteArray(out, family);
}
out.writeBoolean(qualifier != null);
if (qualifier != null) {
Bytes.writeByteArray(out, qualifier);
}
}
}
