Viewing file:  check_user_privileges.lib.php (6.99 KB) -rw-r--r--
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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Get user's global privileges and some db-specific privileges
*
* @package PhpMyAdmin
*/
if (! defined('PHPMYADMIN')) {
exit;
}
/**
*
*/
$GLOBALS['is_superuser'] = $GLOBALS['dbi']->isSuperuser();
/**
* sets privilege information extracted from SHOW GRANTS result
*
* Detection for some CREATE privilege.
*
* Since MySQL 4.1.2, we can easily detect current user's grants using $userlink
* (no control user needed) and we don't have to try any other method for
* detection
*
* @todo fix to get really all privileges, not only explicitly defined for this user
* from MySQL manual: (http://dev.mysql.com/doc/refman/5.0/en/show-grants.html)
* SHOW GRANTS displays only the privileges granted explicitly to the named
* account. Other privileges might be available to the account, but they are not
* displayed. For example, if an anonymous account exists, the named account
* might be able to use its privileges, but SHOW GRANTS will not display them.
*
* @return void
*/
function PMA_analyseShowGrant()
{
if (PMA_Util::cacheExists('is_create_db_priv')) {
$GLOBALS['is_create_db_priv'] = PMA_Util::cacheGet(
'is_create_db_priv'
);
$GLOBALS['is_process_priv'] = PMA_Util::cacheGet(
'is_process_priv'
);
$GLOBALS['is_reload_priv'] = PMA_Util::cacheGet(
'is_reload_priv'
);
$GLOBALS['db_to_create'] = PMA_Util::cacheGet(
'db_to_create'
);
$GLOBALS['dbs_where_create_table_allowed'] = PMA_Util::cacheGet(
'dbs_where_create_table_allowed'
);
$GLOBALS['dbs_to_test'] = PMA_Util::cacheGet(
'dbs_to_test'
);
return;
}
// defaults
$GLOBALS['is_create_db_priv'] = false;
$GLOBALS['is_process_priv'] = true;
$GLOBALS['is_reload_priv'] = false;
$GLOBALS['db_to_create'] = '';
$GLOBALS['dbs_where_create_table_allowed'] = array();
$GLOBALS['dbs_to_test'] = $GLOBALS['dbi']->getSystemSchemas();
$rs_usr = $GLOBALS['dbi']->tryQuery('SHOW GRANTS');
if (! $rs_usr) {
return;
}
$re0 = '(^|(\\\\\\\\)+|[^\\\\])'; // non-escaped wildcards
$re1 = '(^|[^\\\\])(\\\)+'; // escaped wildcards
while ($row = $GLOBALS['dbi']->fetchRow($rs_usr)) {
// extract db from GRANT ... ON *.* or GRANT ... ON db.*
$db_name_offset = /*overload*/mb_strpos($row[0], ' ON ') + 4;
$show_grants_dbname = /*overload*/mb_substr(
$row[0], $db_name_offset,
/*overload*/mb_strpos($row[0], '.', $db_name_offset) - $db_name_offset
);
$show_grants_dbname = PMA_Util::unQuote($show_grants_dbname, '`');
$show_grants_str = /*overload*/mb_substr(
$row[0],
6,
(/*overload*/mb_strpos($row[0], ' ON ') - 6)
);
if ($show_grants_dbname == '*') {
if ($show_grants_str != 'USAGE') {
$GLOBALS['dbs_to_test'] = false;
}
} elseif ($GLOBALS['dbs_to_test'] !== false) {
$GLOBALS['dbs_to_test'][] = $show_grants_dbname;
}
if ($show_grants_str == 'RELOAD') {
$GLOBALS['is_reload_priv'] = true;
}
/**
* @todo if we find CREATE VIEW but not CREATE, do not offer
* the create database dialog box
*/
if ($show_grants_str == 'ALL'
|| $show_grants_str == 'ALL PRIVILEGES'
|| $show_grants_str == 'CREATE'
|| strpos($show_grants_str, 'CREATE,') !== false
) {
if ($show_grants_dbname == '*') {
// a global CREATE privilege
$GLOBALS['is_create_db_priv'] = true;
$GLOBALS['is_reload_priv'] = true;
$GLOBALS['db_to_create'] = '';
$GLOBALS['dbs_where_create_table_allowed'][] = '*';
// @todo we should not break here, cause GRANT ALL *.*
// could be revoked by a later rule like GRANT SELECT ON db.*
break;
} else {
// this array may contain wildcards
$GLOBALS['dbs_where_create_table_allowed'][] = $show_grants_dbname;
$dbname_to_test = PMA_Util::backquote($show_grants_dbname);
if ($GLOBALS['is_create_db_priv']) {
// no need for any more tests if we already know this
continue;
}
// does this db exist?
if ((preg_match('/' . $re0 . '%|_/', $show_grants_dbname)
&& ! preg_match('/\\\\%|\\\\_/', $show_grants_dbname))
|| (! $GLOBALS['dbi']->tryQuery(
'USE ' . preg_replace(
'/' . $re1 . '(%|_)/', '\\1\\3', $dbname_to_test
)
)
&& /*overload*/mb_substr($GLOBALS['dbi']->getError(), 1, 4) != 1044)
) {
/**
* Do not handle the underscore wildcard
* (this case must be rare anyway)
*/
$GLOBALS['db_to_create'] = preg_replace(
'/' . $re0 . '%/', '\\1',
$show_grants_dbname
);
$GLOBALS['db_to_create'] = preg_replace(
'/' . $re1 . '(%|_)/', '\\1\\3',
$GLOBALS['db_to_create']
);
$GLOBALS['is_create_db_priv'] = true;
/**
* @todo collect $GLOBALS['db_to_create'] into an array,
* to display a drop-down in the "Create database" dialog
*/
// we don't break, we want all possible databases
//break;
} // end if
} // end elseif
} // end if
} // end while
$GLOBALS['dbi']->freeResult($rs_usr);
// must also cacheUnset() them in
// libraries/plugins/auth/AuthenticationCookie.class.php
PMA_Util::cacheSet('is_create_db_priv', $GLOBALS['is_create_db_priv']);
PMA_Util::cacheSet('is_process_priv', $GLOBALS['is_process_priv']);
PMA_Util::cacheSet('is_reload_priv', $GLOBALS['is_reload_priv']);
PMA_Util::cacheSet('db_to_create', $GLOBALS['db_to_create']);
PMA_Util::cacheSet(
'dbs_where_create_table_allowed',
$GLOBALS['dbs_where_create_table_allowed']
);
PMA_Util::cacheSet('dbs_to_test', $GLOBALS['dbs_to_test']);
} // end function
if (!PMA_DRIZZLE) {
PMA_analyseShowGrant();
} else {
// todo: for simple_user_policy only database with user's login can be created
// (unless logged in as root)
$GLOBALS['is_create_db_priv'] = $GLOBALS['is_superuser'];
$GLOBALS['is_process_priv'] = false;
$GLOBALS['is_reload_priv'] = false;
$GLOBALS['db_to_create'] = '';
$GLOBALS['dbs_where_create_table_allowed'] = array('*');
$GLOBALS['dbs_to_test'] = false;
}
?>
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