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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.hive.ql.security.authorization.plugin.sqlstd;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.apache.hadoop.hive.metastore.IMetaStoreClient;
import org.apache.hadoop.hive.ql.security.authorization.plugin.HiveAccessControlException;
import org.apache.hadoop.hive.ql.security.authorization.plugin.HiveAuthzPluginException;
import org.apache.hadoop.hive.ql.security.authorization.plugin.HiveOperationType;
import org.apache.hadoop.hive.ql.security.authorization.plugin.HivePrincipal;
import org.apache.hadoop.hive.ql.security.authorization.plugin.HivePrincipal.HivePrincipalType;
import org.apache.hadoop.hive.ql.security.authorization.plugin.HivePrivilege;
import org.apache.hadoop.hive.ql.security.authorization.plugin.HivePrivilegeObject;
/**
* Utility class to authorize grant/revoke privileges
*/
public class GrantPrivAuthUtils {
static void authorize(List hivePrincipals, List hivePrivileges,
HivePrivilegeObject hivePrivObject, boolean grantOption, IMetaStoreClient metastoreClient,
String userName, List curRoles, boolean isAdmin)
throws HiveAuthzPluginException, HiveAccessControlException {
// check if this user has grant privileges for this privileges on this
// object
// map priv being granted to required privileges
RequiredPrivileges reqPrivs = getGrantRequiredPrivileges(hivePrivileges);
// check if this user has necessary privileges (reqPrivs) on this object
checkRequiredPrivileges(reqPrivs, hivePrivObject, metastoreClient, userName, curRoles, isAdmin,
HiveOperationType.GRANT_PRIVILEGE);
}
private static void checkRequiredPrivileges(
RequiredPrivileges reqPrivileges, HivePrivilegeObject hivePrivObject,
IMetaStoreClient metastoreClient, String userName, List curRoles, boolean isAdmin,
HiveOperationType opType)
throws HiveAuthzPluginException, HiveAccessControlException {
// keep track of the principals on which privileges have been checked for
// this object
// get privileges for this user and its roles on this object
RequiredPrivileges availPrivs = SQLAuthorizationUtils.getPrivilegesFromMetaStore(
metastoreClient, userName, hivePrivObject, curRoles, isAdmin);
// check if required privileges is subset of available privileges
List deniedMessages = new ArrayList();
Collection missingPrivs = reqPrivileges.findMissingPrivs(availPrivs);
SQLAuthorizationUtils.addMissingPrivMsg(missingPrivs, hivePrivObject, deniedMessages);
SQLAuthorizationUtils.assertNoDeniedPermissions(new HivePrincipal(userName,
HivePrincipalType.USER), opType, deniedMessages);
}
private static RequiredPrivileges getGrantRequiredPrivileges(List hivePrivileges)
throws HiveAuthzPluginException {
RequiredPrivileges reqPrivs = new RequiredPrivileges();
for (HivePrivilege hivePriv : hivePrivileges) {
reqPrivs.addPrivilege(hivePriv.getName(), true /* grant priv required */);
}
return reqPrivs;
}
}
