395 lines
14 KiB
PHP
395 lines
14 KiB
PHP
<?php
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/* vim: set expandtab sw=4 ts=4 sts=4: */
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/**
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* Get user's global privileges and some db-specific privileges
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*
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* @package PhpMyAdmin
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*/
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if (! defined('PHPMYADMIN')) {
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exit;
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}
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/**
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*
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*/
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$GLOBALS['is_superuser'] = $GLOBALS['dbi']->isSuperuser();
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/**
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* Check if user has required privileges for
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* performing 'FLUSH PRIVILEGES' operation
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*
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* @return void
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*/
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function PMA_checkRequiredPrivilegesForFlushing()
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{
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$res = $GLOBALS['dbi']->tryQuery(
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'FLUSH PRIVILEGES'
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);
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// Save the value
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$GLOBALS['flush_priv'] = $res;
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}
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/**
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* Check if user has required privileges for
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* performing 'Adjust privileges' operations
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*
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* @return void
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*/
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function PMA_checkRequiredPrivilgesForAdjust()
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{
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$privs_available = true;
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// FOR DB PRIVS
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$select_privs_available = $GLOBALS['dbi']->tryQuery(
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'SELECT * FROM `mysql`.`db` LIMIT 1'
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);
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$privs_available = $select_privs_available && $privs_available;
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if ($privs_available) {
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$delete_privs_available = $GLOBALS['dbi']->tryQuery(
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'DELETE FROM `mysql`.`db` WHERE `host` = "" AND '
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. '`Db` = "" AND `User` = "" LIMIT 1'
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);
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$privs_available = $delete_privs_available && $privs_available;
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}
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if ($privs_available) {
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$insert_privs_available = $GLOBALS['dbi']->tryQuery(
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'INSERT INTO `mysql`.`db`(`host`, `Db`, `User`) VALUES("pma_test_host", '
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. '"mysql", "pma_test_user")'
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);
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// If successful test insert, delete the test row
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if ($insert_privs_available) {
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$GLOBALS['dbi']->tryQuery(
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'DELETE FROM `mysql`.`db` WHERE host = "pma_test_host" AND '
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. 'Db = "mysql" AND User = "pma_test_user" LIMIT 1'
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);
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}
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$privs_available = $insert_privs_available && $privs_available;
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}
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if ($privs_available) {
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$update_privs_available = $GLOBALS['dbi']->tryQuery(
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'UPDATE `mysql`.`db` SET `host` = "" WHERE `host` = "" AND '
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. '`Db` = "" AND `User` = "" LIMIT 1'
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);
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$privs_available = $update_privs_available && $privs_available;
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}
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// save the value
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$GLOBALS['db_priv'] = $privs_available;
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// reset the value
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$privs_available = true;
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// FOR COLUMNS_PRIV
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$select_privs_available = $GLOBALS['dbi']->tryQuery(
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'SELECT * FROM `mysql`.`columns_priv` LIMIT 1'
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);
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$privs_available = $select_privs_available && $privs_available;
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if ($privs_available) {
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$delete_privs_available = $GLOBALS['dbi']->tryQuery(
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'DELETE FROM `mysql`.`columns_priv` WHERE `host` = "" AND '
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. '`Db` = "" AND `User` = "" LIMIT 1'
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);
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$privs_available = $delete_privs_available && $privs_available;
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}
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if ($privs_available) {
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$insert_privs_available = $GLOBALS['dbi']->tryQuery(
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'INSERT INTO `mysql`.`columns_priv`(`host`, `Db`, `User`, `Table_name`,'
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. ' `Column_name`) VALUES("pma_test_host", '
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. '"mysql", "pma_test_user", "", "")'
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);
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// If successful test insert, delete the test row
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if ($insert_privs_available) {
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$GLOBALS['dbi']->tryQuery(
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'DELETE FROM `mysql`.`columns_priv` WHERE host = "pma_test_host" AND '
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. 'Db = "mysql" AND User = "pma_test_user" AND Table_name = ""'
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. ' AND Column_name = "" LIMIT 1'
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);
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}
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$privs_available = $insert_privs_available && $privs_available;
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}
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if ($privs_available) {
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$update_privs_available = $GLOBALS['dbi']->tryQuery(
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'UPDATE `mysql`.`columns_priv` SET `host` = "" WHERE `host` = "" AND '
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. '`Db` = "" AND `User` = "" AND Column_name = "" AND Table_name = "" LIMIT 1'
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);
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$privs_available = $update_privs_available && $privs_available;
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}
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// Save the value
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$GLOBALS['col_priv'] = $privs_available;
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// Reset the value
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$privs_available = true;
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// FOR TABLES_PRIV
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$select_privs_available = $GLOBALS['dbi']->tryQuery(
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'SELECT * FROM `mysql`.`tables_priv` LIMIT 1'
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);
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$privs_available = $select_privs_available && $privs_available;
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if ($privs_available) {
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$delete_privs_available = $GLOBALS['dbi']->tryQuery(
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'DELETE FROM `mysql`.`tables_priv` WHERE `host` = "" AND '
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. '`Db` = "" AND `User` = "" AND Table_name = "" LIMIT 1'
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);
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$privs_available = $delete_privs_available && $privs_available;
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}
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if ($privs_available) {
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$insert_privs_available = $GLOBALS['dbi']->tryQuery(
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'INSERT INTO `mysql`.`tables_priv`(`host`, `Db`, `User`, `Table_name`'
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. ') VALUES("pma_test_host", '
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. '"mysql", "pma_test_user", "")'
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);
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// If successful test insert, delete the test row
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if ($insert_privs_available) {
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$GLOBALS['dbi']->tryQuery(
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'DELETE FROM `mysql`.`tables_priv` WHERE host = "pma_test_host" AND '
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. 'Db = "mysql" AND User = "pma_test_user" AND Table_name = "" LIMIT 1'
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);
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}
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$privs_available = $insert_privs_available && $privs_available;
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}
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if ($privs_available) {
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$update_privs_available = $GLOBALS['dbi']->tryQuery(
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'UPDATE `mysql`.`tables_priv` SET `host` = "" WHERE `host` = "" AND '
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. '`Db` = "" AND `User` = "" AND Table_name = "" LIMIT 1'
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);
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$privs_available = $update_privs_available && $privs_available;
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}
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// Save the value
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$GLOBALS['table_priv'] = $privs_available;
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// Reset the value
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$privs_available = true;
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// FOR PROCS_PRIV
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$select_privs_available = $GLOBALS['dbi']->tryQuery(
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'SELECT * FROM `mysql`.`procs_priv` LIMIT 1'
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);
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$privs_available = $select_privs_available && $privs_available;
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if ($privs_available) {
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$delete_privs_available = $GLOBALS['dbi']->tryQuery(
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'DELETE FROM `mysql`.`procs_priv` WHERE `host` = "" AND '
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. '`Db` = "" AND `User` = "" AND `Routine_name` = ""'
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. ' AND `Routine_type` = "" LIMIT 1'
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);
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$privs_available = $delete_privs_available && $privs_available;
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}
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if ($privs_available) {
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$insert_privs_available = $GLOBALS['dbi']->tryQuery(
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'INSERT INTO `mysql`.`procs_priv`(`host`, `Db`, `User`, `Routine_name`,'
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. ' `Routine_type`) VALUES("pma_test_host", '
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. '"mysql", "pma_test_user", "", "PROCEDURE")'
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);
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// If successful test insert, delete the test row
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if ($insert_privs_available) {
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$GLOBALS['dbi']->tryQuery(
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'DELETE FROM `mysql`.`procs_priv` WHERE `host` = "pma_test_host" AND '
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. '`Db` = "mysql" AND `User` = "pma_test_user" AND `Routine_name` = ""'
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. ' AND `Routine_type` = "PROCEDURE" LIMIT 1'
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);
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}
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$privs_available = $insert_privs_available && $privs_available;
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}
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if ($privs_available) {
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$update_privs_available = $GLOBALS['dbi']->tryQuery(
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'UPDATE `mysql`.`procs_priv` SET `host` = "" WHERE `host` = "" AND '
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. '`Db` = "" AND `User` = "" AND `Routine_name` = "" LIMIT 1'
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);
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$privs_available = $update_privs_available && $privs_available;
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}
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// Save the value
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$GLOBALS['proc_priv'] = $privs_available;
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}
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/**
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* sets privilege information extracted from SHOW GRANTS result
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*
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* Detection for some CREATE privilege.
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*
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* Since MySQL 4.1.2, we can easily detect current user's grants using $userlink
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* (no control user needed) and we don't have to try any other method for
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* detection
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*
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* @todo fix to get really all privileges, not only explicitly defined for this user
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* from MySQL manual: (http://dev.mysql.com/doc/refman/5.0/en/show-grants.html)
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* SHOW GRANTS displays only the privileges granted explicitly to the named
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* account. Other privileges might be available to the account, but they are not
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* displayed. For example, if an anonymous account exists, the named account
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* might be able to use its privileges, but SHOW GRANTS will not display them.
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*
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* @return void
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*/
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function PMA_analyseShowGrant()
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{
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if (PMA_Util::cacheExists('is_create_db_priv')) {
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$GLOBALS['is_create_db_priv'] = PMA_Util::cacheGet(
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'is_create_db_priv'
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);
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$GLOBALS['is_reload_priv'] = PMA_Util::cacheGet(
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'is_reload_priv'
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);
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$GLOBALS['db_to_create'] = PMA_Util::cacheGet(
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'db_to_create'
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);
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$GLOBALS['dbs_where_create_table_allowed'] = PMA_Util::cacheGet(
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'dbs_where_create_table_allowed'
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);
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$GLOBALS['dbs_to_test'] = PMA_Util::cacheGet(
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'dbs_to_test'
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);
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return;
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}
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// defaults
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$GLOBALS['is_create_db_priv'] = false;
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$GLOBALS['is_reload_priv'] = false;
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$GLOBALS['db_to_create'] = '';
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$GLOBALS['dbs_where_create_table_allowed'] = array();
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$GLOBALS['dbs_to_test'] = $GLOBALS['dbi']->getSystemSchemas();
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$rs_usr = $GLOBALS['dbi']->tryQuery('SHOW GRANTS');
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if (! $rs_usr) {
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return;
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}
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$re0 = '(^|(\\\\\\\\)+|[^\\\\])'; // non-escaped wildcards
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$re1 = '(^|[^\\\\])(\\\)+'; // escaped wildcards
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while ($row = $GLOBALS['dbi']->fetchRow($rs_usr)) {
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// extract db from GRANT ... ON *.* or GRANT ... ON db.*
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$db_name_offset = /*overload*/mb_strpos($row[0], ' ON ') + 4;
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$show_grants_dbname = /*overload*/mb_substr(
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$row[0], $db_name_offset,
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/*overload*/mb_strpos($row[0], '.', $db_name_offset) - $db_name_offset
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);
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$show_grants_dbname = PMA_Util::unQuote($show_grants_dbname, '`');
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$show_grants_str = /*overload*/mb_substr(
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$row[0],
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6,
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(/*overload*/mb_strpos($row[0], ' ON ') - 6)
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);
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if ($show_grants_dbname == '*') {
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if ($show_grants_str != 'USAGE') {
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$GLOBALS['dbs_to_test'] = false;
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}
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} elseif ($GLOBALS['dbs_to_test'] !== false) {
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$GLOBALS['dbs_to_test'][] = $show_grants_dbname;
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}
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if ($show_grants_str == 'RELOAD') {
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$GLOBALS['is_reload_priv'] = true;
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}
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/**
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* @todo if we find CREATE VIEW but not CREATE, do not offer
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* the create database dialog box
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*/
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if ($show_grants_str == 'ALL'
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|| $show_grants_str == 'ALL PRIVILEGES'
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|| $show_grants_str == 'CREATE'
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|| strpos($show_grants_str, 'CREATE,') !== false
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) {
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if ($show_grants_dbname == '*') {
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// a global CREATE privilege
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$GLOBALS['is_create_db_priv'] = true;
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$GLOBALS['is_reload_priv'] = true;
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$GLOBALS['db_to_create'] = '';
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$GLOBALS['dbs_where_create_table_allowed'][] = '*';
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// @todo we should not break here, cause GRANT ALL *.*
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// could be revoked by a later rule like GRANT SELECT ON db.*
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break;
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} else {
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// this array may contain wildcards
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$GLOBALS['dbs_where_create_table_allowed'][] = $show_grants_dbname;
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$dbname_to_test = PMA_Util::backquote($show_grants_dbname);
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if ($GLOBALS['is_create_db_priv']) {
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// no need for any more tests if we already know this
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continue;
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}
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// does this db exist?
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if ((preg_match('/' . $re0 . '%|_/', $show_grants_dbname)
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&& ! preg_match('/\\\\%|\\\\_/', $show_grants_dbname))
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|| (! $GLOBALS['dbi']->tryQuery(
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'USE ' . preg_replace(
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'/' . $re1 . '(%|_)/', '\\1\\3', $dbname_to_test
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)
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)
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&& /*overload*/mb_substr($GLOBALS['dbi']->getError(), 1, 4) != 1044)
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) {
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/**
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* Do not handle the underscore wildcard
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* (this case must be rare anyway)
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*/
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$GLOBALS['db_to_create'] = preg_replace(
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'/' . $re0 . '%/', '\\1',
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$show_grants_dbname
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);
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$GLOBALS['db_to_create'] = preg_replace(
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'/' . $re1 . '(%|_)/', '\\1\\3',
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$GLOBALS['db_to_create']
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);
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$GLOBALS['is_create_db_priv'] = true;
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/**
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* @todo collect $GLOBALS['db_to_create'] into an array,
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* to display a drop-down in the "Create database" dialog
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*/
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// we don't break, we want all possible databases
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//break;
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} // end if
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} // end elseif
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} // end if
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} // end while
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$GLOBALS['dbi']->freeResult($rs_usr);
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// must also cacheUnset() them in
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// libraries/plugins/auth/AuthenticationCookie.class.php
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PMA_Util::cacheSet('is_create_db_priv', $GLOBALS['is_create_db_priv']);
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PMA_Util::cacheSet('is_reload_priv', $GLOBALS['is_reload_priv']);
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PMA_Util::cacheSet('db_to_create', $GLOBALS['db_to_create']);
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PMA_Util::cacheSet(
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'dbs_where_create_table_allowed',
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$GLOBALS['dbs_where_create_table_allowed']
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);
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PMA_Util::cacheSet('dbs_to_test', $GLOBALS['dbs_to_test']);
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} // end function
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$user = $GLOBALS['dbi']->fetchValue("SELECT CURRENT_USER();");
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if ($user == '@') { // MySQL is started with --skip-grant-tables
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$GLOBALS['is_create_db_priv'] = true;
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$GLOBALS['is_reload_priv'] = true;
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$GLOBALS['db_to_create'] = '';
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$GLOBALS['dbs_where_create_table_allowed'] = array('*');
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$GLOBALS['dbs_to_test'] = false;
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} else {
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PMA_analyseShowGrant();
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}
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// Check if privileges to 'mysql'.col_privs, 'mysql'.db,
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// 'mysql'.table_privs, 'mysql'.proc_privs and privileges for
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// flushing the privileges are available
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PMA_checkRequiredPrivilegesForFlushing();
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PMA_checkRequiredPrivilgesForAdjust();
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