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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;
import java.util.List;
import org.apache.hadoop.hive.common.classification.InterfaceAudience.LimitedPrivate;
import org.apache.hadoop.hive.common.classification.InterfaceStability.Evolving;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.hive.ql.parse.SemanticException;
import org.apache.hadoop.hive.ql.security.HiveAuthenticationProvider;
import org.apache.hadoop.hive.ql.security.authorization.HiveAuthorizationProvider;
/**
* Interface for hive authorization plugins. Plugins will be better shielded from changes
* to this interface by extending AbstractHiveAuthorizer instead of extending this
* interface directly.
*
* Note that this interface is for limited use by specific apache projects, including
* Apache Ranger (formerly known as Argus), and Apache Sentry, and is subject to
* change across releases.
*
* Used by the DDLTasks for access control statement,
* and for checking authorization from Driver.doAuthorization()
*
* This a more generic version of
* {@link HiveAuthorizationProvider} that lets you define the behavior of access control
* statements and does not make assumptions about the privileges needed for a hive operation.
* This is referred to as V2 authorizer in other parts of the code.
*/
@LimitedPrivate(value = { "Apache Argus (incubating)" })
@Evolving
public interface HiveAuthorizer {
public enum VERSION { V1 };
/**
* @return version of HiveAuthorizer interface that is implemented by this instance
*/
public VERSION getVersion();
/**
* Grant privileges for principals on the object
* @param hivePrincipals
* @param hivePrivileges
* @param hivePrivObject
* @param grantorPrincipal
* @param grantOption
* @throws HiveAuthzPluginException
* @throws HiveAccessControlException
*/
void grantPrivileges(List hivePrincipals, List hivePrivileges,
HivePrivilegeObject hivePrivObject, HivePrincipal grantorPrincipal, boolean grantOption)
throws HiveAuthzPluginException, HiveAccessControlException;
/**
* Revoke privileges for principals on the object
* @param hivePrincipals
* @param hivePrivileges
* @param hivePrivObject
* @param grantorPrincipal
* @param grantOption
* @throws HiveAuthzPluginException
* @throws HiveAccessControlException
*/
void revokePrivileges(List hivePrincipals, List hivePrivileges,
HivePrivilegeObject hivePrivObject, HivePrincipal grantorPrincipal, boolean grantOption)
throws HiveAuthzPluginException, HiveAccessControlException;
/**
* Create role
* @param roleName
* @param adminGrantor - The user in "[ WITH ADMIN ]" clause of "create role"
* @throws HiveAuthzPluginException
* @throws HiveAccessControlException
*/
void createRole(String roleName, HivePrincipal adminGrantor)
throws HiveAuthzPluginException, HiveAccessControlException;
/**
* Drop role
* @param roleName
* @throws HiveAuthzPluginException
* @throws HiveAccessControlException
*/
void dropRole(String roleName)
throws HiveAuthzPluginException, HiveAccessControlException;
/**
* Get the grant information for principals granted the given role
* @param roleName
* @return
* @throws HiveAuthzPluginException
* @throws HiveAccessControlException
*/
List getPrincipalGrantInfoForRole(String roleName)
throws HiveAuthzPluginException, HiveAccessControlException;
/**
* Get the grant information of roles the given principal belongs to
* @param principal
* @return
* @throws HiveAuthzPluginException
* @throws HiveAccessControlException
*/
List getRoleGrantInfoForPrincipal(HivePrincipal principal)
throws HiveAuthzPluginException, HiveAccessControlException;
/**
* Grant roles in given roles list to principals in given hivePrincipals list
* @param hivePrincipals
* @param roles
* @param grantOption
* @param grantorPrinc
* @throws HiveAuthzPluginException
* @throws HiveAccessControlException
*/
void grantRole(List hivePrincipals, List roles, boolean grantOption,
HivePrincipal grantorPrinc)
throws HiveAuthzPluginException, HiveAccessControlException;
/**
* Revoke roles in given roles list to principals in given hivePrincipals list
* @param hivePrincipals
* @param roles
* @param grantOption
* @param grantorPrinc
* @throws HiveAuthzPluginException
* @throws HiveAccessControlException
*/
void revokeRole(List hivePrincipals, List roles, boolean grantOption,
HivePrincipal grantorPrinc)
throws HiveAuthzPluginException, HiveAccessControlException;
/**
* Check if user has privileges to do this action on these objects
* @param hiveOpType
* @param inputsHObjs
* @param outputHObjs
* @param context
* @throws HiveAuthzPluginException
* @throws HiveAccessControlException
*/
void checkPrivileges(HiveOperationType hiveOpType, List inputsHObjs,
List outputHObjs, HiveAuthzContext context)
throws HiveAuthzPluginException, HiveAccessControlException;
/**
* Filter out any objects that should not be shown to the user, from the list of
* tables or databases coming from a 'show tables' or 'show databases' command
* @param listObjs List of all objects obtained as result of a show command
* @param context
* @return filtered list of objects that will be returned to the user invoking the command
* @throws HiveAuthzPluginException
* @throws HiveAccessControlException
*/
List filterListCmdObjects(List listObjs,
HiveAuthzContext context)
throws HiveAuthzPluginException, HiveAccessControlException;
/**
* @return all existing roles
* @throws HiveAuthzPluginException
* @throws HiveAccessControlException
*/
List getAllRoles()
throws HiveAuthzPluginException, HiveAccessControlException;
/**
* Show privileges for given principal on given object
* @param principal
* @param privObj
* @return
* @throws HiveAuthzPluginException
* @throws HiveAccessControlException
*/
List showPrivileges(HivePrincipal principal, HivePrivilegeObject privObj)
throws HiveAuthzPluginException, HiveAccessControlException;
/**
* Set the current role to roleName argument
* @param roleName
* @throws HiveAccessControlException
* @throws HiveAuthzPluginException
*/
void setCurrentRole(String roleName) throws HiveAccessControlException, HiveAuthzPluginException;
/**
* @return List having names of current roles
* @throws HiveAuthzPluginException
*/
List getCurrentRoleNames() throws HiveAuthzPluginException;
/**
* Modify the given HiveConf object to configure authorization related parameters
* or other parameters related to hive security
* @param hiveConf
* @throws HiveAuthzPluginException
*/
void applyAuthorizationConfigPolicy(HiveConf hiveConf) throws HiveAuthzPluginException;
/**
* Get a {@link HiveAuthorizationTranslator} implementation. See
* {@link HiveAuthorizationTranslator} for details. Return null if no
* customization is needed. Most implementations are expected to return null.
*
* The java signature of the method makes it necessary to only return Object
* type so that older implementations can extend the interface to build
* against older versions of Hive that don't include this additional method
* and HiveAuthorizationTranslator class. However, if a non null value is
* returned, the Object has to be of type HiveAuthorizationTranslator
*
* @return
* @throws HiveException
*/
Object getHiveAuthorizationTranslator() throws HiveAuthzPluginException;
/**
* TableMaskingPolicy defines how users can access base tables. It defines a
* policy on what columns and rows are hidden, masked or redacted based on
* user, role or location.
*/
/**
* applyRowFilterAndColumnMasking is called once for each table in a query.
* (part 1) It expects a valid filter condition to be returned. Null indicates no filtering is
* required.
*
* Example: table foo(c int) -> "c > 0 && c % 2 = 0"
*
* (part 2) It expects a valid expression as used in a select clause. Null
* is NOT a valid option. If no transformation is needed simply return the
* column name.
*
* Example: column a -> "a" (no transform)
*
* Example: column a -> "reverse(a)" (call the reverse function on a)
*
* Example: column a -> "5" (replace column a with the constant 5)
*
* @return List
* please return the list of HivePrivilegeObjects that need to be rewritten.
*
* @throws SemanticException
*/
List applyRowFilterAndColumnMasking(HiveAuthzContext context,
List privObjs) throws SemanticException;
/**
* needTransform() is called once per user in a query.
* Returning false short-circuits the generation of row/column transforms.
*
* @return
* @throws SemanticException
*/
boolean needTransform();
/**
* @return HivePolicyProvider instance (expected to be a singleton)
* @throws HiveAuthzPluginException
*/
HivePolicyProvider getHivePolicyProvider() throws HiveAuthzPluginException;
}
