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#include <Storages/System/StorageSystemGrants.h>
#include <Storages/System/StorageSystemPrivileges.h>
#include <DataTypes/DataTypeEnum.h>
#include <DataTypes/DataTypeNullable.h>
#include <DataTypes/DataTypeString.h>
#include <DataTypes/DataTypesNumber.h>
#include <Columns/ColumnString.h>
#include <Columns/ColumnNullable.h>
#include <Columns/ColumnsNumber.h>
#include <Access/AccessControl.h>
#include <Access/Common/AccessRightsElement.h>
#include <Access/Role.h>
#include <Access/User.h>
#include <Interpreters/Context.h>
#include <boost/range/algorithm_ext/push_back.hpp>
namespace DB
{
NamesAndTypesList StorageSystemGrants::getNamesAndTypes()
{
NamesAndTypesList names_and_types{
{"user_name", std::make_shared<DataTypeNullable>(std::make_shared<DataTypeString>())},
{"role_name", std::make_shared<DataTypeNullable>(std::make_shared<DataTypeString>())},
{"access_type", std::make_shared<DataTypeEnum16>(StorageSystemPrivileges::getAccessTypeEnumValues())},
{"database", std::make_shared<DataTypeNullable>(std::make_shared<DataTypeString>())},
{"table", std::make_shared<DataTypeNullable>(std::make_shared<DataTypeString>())},
{"column", std::make_shared<DataTypeNullable>(std::make_shared<DataTypeString>())},
{"is_partial_revoke", std::make_shared<DataTypeUInt8>()},
{"grant_option", std::make_shared<DataTypeUInt8>()},
};
return names_and_types;
}
void StorageSystemGrants::fillData(MutableColumns & res_columns, ContextPtr context, const SelectQueryInfo &) const
{
/// If "select_from_system_db_requires_grant" is enabled the access rights were already checked in InterpreterSelectQuery.
const auto & access_control = context->getAccessControl();
if (!access_control.doesSelectFromSystemDatabaseRequireGrant())
context->checkAccess(AccessType::SHOW_USERS | AccessType::SHOW_ROLES);
std::vector<UUID> ids = access_control.findAll<User>();
boost::range::push_back(ids, access_control.findAll<Role>());
size_t column_index = 0;
auto & column_user_name = assert_cast<ColumnString &>(assert_cast<ColumnNullable &>(*res_columns[column_index]).getNestedColumn());
auto & column_user_name_null_map = assert_cast<ColumnNullable &>(*res_columns[column_index++]).getNullMapData();
auto & column_role_name = assert_cast<ColumnString &>(assert_cast<ColumnNullable &>(*res_columns[column_index]).getNestedColumn());
auto & column_role_name_null_map = assert_cast<ColumnNullable &>(*res_columns[column_index++]).getNullMapData();
auto & column_access_type = assert_cast<ColumnInt16 &>(*res_columns[column_index++]).getData();
auto & column_database = assert_cast<ColumnString &>(assert_cast<ColumnNullable &>(*res_columns[column_index]).getNestedColumn());
auto & column_database_null_map = assert_cast<ColumnNullable &>(*res_columns[column_index++]).getNullMapData();
auto & column_table = assert_cast<ColumnString &>(assert_cast<ColumnNullable &>(*res_columns[column_index]).getNestedColumn());
auto & column_table_null_map = assert_cast<ColumnNullable &>(*res_columns[column_index++]).getNullMapData();
auto & column_column = assert_cast<ColumnString &>(assert_cast<ColumnNullable &>(*res_columns[column_index]).getNestedColumn());
auto & column_column_null_map = assert_cast<ColumnNullable &>(*res_columns[column_index++]).getNullMapData();
auto & column_is_partial_revoke = assert_cast<ColumnUInt8 &>(*res_columns[column_index++]).getData();
auto & column_grant_option = assert_cast<ColumnUInt8 &>(*res_columns[column_index++]).getData();
auto add_row = [&](const String & grantee_name,
AccessEntityType grantee_type,
AccessType access_type,
const String * database,
const String * table,
const String * column,
bool is_partial_revoke,
bool grant_option)
{
if (grantee_type == AccessEntityType::USER)
{
column_user_name.insertData(grantee_name.data(), grantee_name.length());
column_user_name_null_map.push_back(false);
column_role_name.insertDefault();
column_role_name_null_map.push_back(true);
}
else if (grantee_type == AccessEntityType::ROLE)
{
column_user_name.insertDefault();
column_user_name_null_map.push_back(true);
column_role_name.insertData(grantee_name.data(), grantee_name.length());
column_role_name_null_map.push_back(false);
}
else
assert(false);
column_access_type.push_back(static_cast<Int16>(access_type));
if (database)
{
column_database.insertData(database->data(), database->length());
column_database_null_map.push_back(false);
}
else
{
column_database.insertDefault();
column_database_null_map.push_back(true);
}
if (table)
{
column_table.insertData(table->data(), table->length());
column_table_null_map.push_back(false);
}
else
{
column_table.insertDefault();
column_table_null_map.push_back(true);
}
if (column)
{
column_column.insertData(column->data(), column->length());
column_column_null_map.push_back(false);
}
else
{
column_column.insertDefault();
column_column_null_map.push_back(true);
}
column_is_partial_revoke.push_back(is_partial_revoke);
column_grant_option.push_back(grant_option);
};
auto add_rows = [&](const String & grantee_name,
AccessEntityType grantee_type,
const AccessRightsElements & elements)
{
for (const auto & element : elements)
{
auto access_types = element.access_flags.toAccessTypes();
if (access_types.empty() || (!element.any_column && element.columns.empty()))
continue;
const auto * database = element.any_database ? nullptr : &element.database;
const auto * table = element.any_table ? nullptr : &element.table;
if (element.any_column)
{
for (const auto & access_type : access_types)
add_row(grantee_name, grantee_type, access_type, database, table, nullptr, element.is_partial_revoke, element.grant_option);
}
else
{
for (const auto & access_type : access_types)
for (const auto & column : element.columns)
add_row(grantee_name, grantee_type, access_type, database, table, &column, element.is_partial_revoke, element.grant_option);
}
}
};
for (const auto & id : ids)
{
auto entity = access_control.tryRead(id);
if (!entity)
continue;
const AccessRights * access = nullptr;
if (auto role = typeid_cast<RolePtr>(entity))
access = &role->access;
else if (auto user = typeid_cast<UserPtr>(entity))
access = &user->access;
else
continue;
const String & grantee_name = entity->getName();
const auto grantee_type = entity->getType();
auto elements = access->getElements();
add_rows(grantee_name, grantee_type, elements);
}
}
}
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