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/*
 * Licensed 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 com.facebook.presto.jdbc.internal.spi.security;

import com.facebook.presto.jdbc.internal.common.CatalogSchemaName;
import com.facebook.presto.jdbc.internal.spi.CatalogSchemaTableName;
import com.facebook.presto.jdbc.internal.spi.SchemaTableName;

import java.security.Principal;
import java.security.cert.X509Certificate;
import java.util.Collections;
import java.util.List;
import java.util.Optional;
import java.util.Set;

import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denyAddColumn;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denyCatalogAccess;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denyCreateSchema;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denyCreateTable;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denyCreateView;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denyCreateViewWithSelect;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denyDeleteTable;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denyDropColumn;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denyDropSchema;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denyDropTable;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denyDropView;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denyGrantTablePrivilege;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denyInsertTable;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denyRenameColumn;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denyRenameSchema;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denyRenameTable;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denyRevokeTablePrivilege;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denySelectColumns;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denySetCatalogSessionProperty;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denyShowSchemas;
import static com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException.denyShowTablesMetadata;

public interface SystemAccessControl
{
    /**
     * Check if the principal is allowed to be the specified user.
     *
     * @throws AccessDeniedException if not allowed
     */
    void checkCanSetUser(Identity identity, AccessControlContext context, Optional principal, String userName);

    default AuthorizedIdentity selectAuthorizedIdentity(Identity identity, AccessControlContext context, String userName, List certificates)
    {
        return new AuthorizedIdentity(userName, "", true);
    }

    /**
     * Check if the query is unexpectedly modified using the credentials passed in the identity.
     *
     * @throws AccessDeniedException if query is modified.
     */
    void checkQueryIntegrity(Identity identity, AccessControlContext context, String query);

    /**
     * Check if identity is allowed to set the specified system property.
     *
     * @throws AccessDeniedException if not allowed
     */
    void checkCanSetSystemSessionProperty(Identity identity, AccessControlContext context, String propertyName);

    /**
     * Check if identity is allowed to access the specified catalog
     *
     * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed
     */
    default void checkCanAccessCatalog(Identity identity, AccessControlContext context, String catalogName)
    {
        denyCatalogAccess(catalogName);
    }

    /**
     * Filter the list of catalogs to those visible to the identity.
     */
    default Set filterCatalogs(Identity identity, AccessControlContext context, Set catalogs)
    {
        return Collections.emptySet();
    }

    /**
     * Check if identity is allowed to create the specified schema in a catalog.
     *
     * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed
     */
    default void checkCanCreateSchema(Identity identity, AccessControlContext context, CatalogSchemaName schema)
    {
        denyCreateSchema(schema.toString());
    }

    /**
     * Check if identity is allowed to drop the specified schema in a catalog.
     *
     * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed
     */
    default void checkCanDropSchema(Identity identity, AccessControlContext context, CatalogSchemaName schema)
    {
        denyDropSchema(schema.toString());
    }

    /**
     * Check if identity is allowed to rename the specified schema in a catalog.
     *
     * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed
     */
    default void checkCanRenameSchema(Identity identity, AccessControlContext context, CatalogSchemaName schema, String newSchemaName)
    {
        denyRenameSchema(schema.toString(), newSchemaName);
    }

    /**
     * Check if identity is allowed to execute SHOW SCHEMAS in a catalog.
     * 

* NOTE: This method is only present to give users an error message when listing is not allowed. * The {@link #filterSchemas} method must filter all results for unauthorized users, * since there are multiple ways to list schemas. * * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed */ default void checkCanShowSchemas(Identity identity, AccessControlContext context, String catalogName) { denyShowSchemas(); } /** * Filter the list of schemas in a catalog to those visible to the identity. */ default Set filterSchemas(Identity identity, AccessControlContext context, String catalogName, Set schemaNames) { return Collections.emptySet(); } /** * Check if identity is allowed to create the specified table in a catalog. * * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed */ default void checkCanCreateTable(Identity identity, AccessControlContext context, CatalogSchemaTableName table) { denyCreateTable(table.toString()); } /** * Check if identity is allowed to drop the specified table in a catalog. * * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed */ default void checkCanDropTable(Identity identity, AccessControlContext context, CatalogSchemaTableName table) { denyDropTable(table.toString()); } /** * Check if identity is allowed to rename the specified table in a catalog. * * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed */ default void checkCanRenameTable(Identity identity, AccessControlContext context, CatalogSchemaTableName table, CatalogSchemaTableName newTable) { denyRenameTable(table.toString(), newTable.toString()); } /** * Check if identity is allowed to show metadata of tables by executing SHOW TABLES, SHOW GRANTS etc. in a catalog. *

* NOTE: This method is only present to give users an error message when listing is not allowed. * The {@link #filterTables} method must filter all results for unauthorized users, * since there are multiple ways to list tables. * * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed */ default void checkCanShowTablesMetadata(Identity identity, AccessControlContext context, CatalogSchemaName schema) { denyShowTablesMetadata(schema.toString()); } /** * Filter the list of tables and views to those visible to the identity. */ default Set filterTables(Identity identity, AccessControlContext context, String catalogName, Set tableNames) { return Collections.emptySet(); } /** * Check if identity is allowed to add columns to the specified table in a catalog. * * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed */ default void checkCanAddColumn(Identity identity, AccessControlContext context, CatalogSchemaTableName table) { denyAddColumn(table.toString()); } /** * Check if identity is allowed to drop columns from the specified table in a catalog. * * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed */ default void checkCanDropColumn(Identity identity, AccessControlContext context, CatalogSchemaTableName table) { denyDropColumn(table.toString()); } /** * Check if identity is allowed to rename a column in the specified table in a catalog. * * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed */ default void checkCanRenameColumn(Identity identity, AccessControlContext context, CatalogSchemaTableName table) { denyRenameColumn(table.toString()); } /** * Check if identity is allowed to select from the specified columns in a relation. The column set can be empty. * * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed */ default void checkCanSelectFromColumns(Identity identity, AccessControlContext context, CatalogSchemaTableName table, Set columns) { denySelectColumns(table.toString(), columns); } /** * Check if identity is allowed to insert into the specified table in a catalog. * * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed */ default void checkCanInsertIntoTable(Identity identity, AccessControlContext context, CatalogSchemaTableName table) { denyInsertTable(table.toString()); } /** * Check if identity is allowed to delete from the specified table in a catalog. * * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed */ default void checkCanDeleteFromTable(Identity identity, AccessControlContext context, CatalogSchemaTableName table) { denyDeleteTable(table.toString()); } /** * Check if identity is allowed to truncate the specified table in a catalog. * * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed */ default void checkCanTruncateTable(Identity identity, AccessControlContext context, CatalogSchemaTableName table) { denyDeleteTable(table.toString()); } /** * Check if identity is allowed to create the specified view in a catalog. * * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed */ default void checkCanCreateView(Identity identity, AccessControlContext context, CatalogSchemaTableName view) { denyCreateView(view.toString()); } /** * Check if identity is allowed to drop the specified view in a catalog. * * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed */ default void checkCanDropView(Identity identity, AccessControlContext context, CatalogSchemaTableName view) { denyDropView(view.toString()); } /** * Check if identity is allowed to create a view that selects from the specified columns in a relation. * * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed */ default void checkCanCreateViewWithSelectFromColumns(Identity identity, AccessControlContext context, CatalogSchemaTableName table, Set columns) { denyCreateViewWithSelect(table.toString(), identity); } /** * Check if identity is allowed to set the specified property in a catalog. * * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed */ default void checkCanSetCatalogSessionProperty(Identity identity, AccessControlContext context, String catalogName, String propertyName) { denySetCatalogSessionProperty(propertyName); } /** * Check if identity is allowed to grant the specified privilege to the grantee on the specified table. * * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed */ default void checkCanGrantTablePrivilege(Identity identity, AccessControlContext context, Privilege privilege, CatalogSchemaTableName table, PrestoPrincipal grantee, boolean withGrantOption) { denyGrantTablePrivilege(privilege.toString(), table.toString()); } /** * Check if identity is allowed to revoke the specified privilege on the specified table from the revokee. * * @throws com.facebook.presto.jdbc.internal.spi.security.AccessDeniedException if not allowed */ default void checkCanRevokeTablePrivilege(Identity identity, AccessControlContext context, Privilege privilege, CatalogSchemaTableName table, PrestoPrincipal revokee, boolean grantOptionFor) { denyRevokeTablePrivilege(privilege.toString(), table.toString()); } }





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