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cache user privilege information;

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replaced ereg_* with preg_* functions;
some tweaks
This commit is contained in:
Sebastian Mendel
2008-01-21 12:50:19 +00:00
parent 67b6618439
commit 2bb7833f50
1 changed files with 91 additions and 45 deletions
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136
libraries/check_user_privileges.lib.php
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@@ -9,19 +9,73 @@
/**
*
*/
$is_create_db_priv = false;
$is_process_priv = true;
$is_reload_priv = false;
$db_to_create = '';
$dbs_where_create_table_allowed = array();
$GLOBALS['is_superuser'] = PMA_isSuperuser();
$is_superuser = PMA_isSuperuser();
function PMA_analyseShowGrant($rs_usr, &$is_create_db_priv, &$db_to_create,
&$is_reload_priv, &$dbs_where_create_table_allowed)
/**
* 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.
*
* @uses $_SESSION['is_create_db_priv'] for caching
* @uses $_SESSION['is_process_priv'] for caching
* @uses $_SESSION['is_reload_priv'] for caching
* @uses $_SESSION['db_to_create'] for caching
* @uses $_SESSION['dbs_where_create_table_allowed'] for caching
* @uses $GLOBALS['is_create_db_priv'] to set it
* @uses $GLOBALS['is_process_priv'] to set it
* @uses $GLOBALS['is_reload_priv'] to set it
* @uses $GLOBALS['db_to_create'] to set it
* @uses $GLOBALS['dbs_where_create_table_allowed'] to set it
* @uses PMA_DBI_try_query()
* @uses PMA_DBI_fetch_row()
* @uses PMA_DBI_free_result()
* @uses PMA_DBI_getError()
* @uses PMA_unQuote()
* @uses PMA_backquote()
* @uses preg_match()
* @uses preg_replace()
* @uses substr()
* @uses strpos()
*/
function PMA_analyseShowGrant()
{
if (isset($_SESSION['is_create_db_priv'])) {
$GLOBALS['is_create_db_priv'] = $_SESSION['is_create_db_priv'];
$GLOBALS['is_process_priv'] = $_SESSION['is_create_db_priv'];
$GLOBALS['is_reload_priv'] = $_SESSION['is_create_db_priv'];
$GLOBALS['db_to_create'] = $_SESSION['is_create_db_priv'];
$GLOBALS['dbs_where_create_table_allowed']
= $_SESSION['is_create_db_priv'];
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();
$rs_usr = PMA_DBI_try_query('SHOW GRANTS');
if (! $rs_usr) {
return;
}
$re0 = '(^|(\\\\\\\\)+|[^\])'; // non-escaped wildcards
$re1 = '(^|[^\])(\\\)+'; // escaped wildcards
while ($row = PMA_DBI_fetch_row($rs_usr)) {
// extract db from GRANT ... ON *.* or GRANT ... ON db.*
$db_name_offset = strpos($row[0], ' ON ') + 4;
@@ -32,8 +86,9 @@ function PMA_analyseShowGrant($rs_usr, &$is_create_db_priv, &$db_to_create,
$show_grants_str = substr($row[0], 6, (strpos($row[0], ' ON ') - 6));
if ($show_grants_str == 'RELOAD') {
$is_reload_priv = true;
$GLOBALS['is_reload_priv'] = true;
}
/**
* @todo if we find CREATE VIEW but not CREATE, do not offer
* the create database dialog box
@@ -44,37 +99,39 @@ function PMA_analyseShowGrant($rs_usr, &$is_create_db_priv, &$db_to_create,
|| strpos($show_grants_str, 'CREATE,') !== false) {
if ($show_grants_dbname == '*') {
// a global CREATE privilege
$is_create_db_priv = true;
$is_reload_priv = true;
$db_to_create = '';
$dbs_where_create_table_allowed[] = '*';
$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
$dbs_where_create_table_allowed[] = $show_grants_dbname;
$GLOBALS['dbs_where_create_table_allowed'][] = $show_grants_dbname;
$dbname_to_test = PMA_backquote($show_grants_dbname);
if ($is_create_db_priv) {
if ($GLOBALS['is_create_db_priv']) {
// no need for any more tests if we already know this
continue;
}
if ((ereg($re0 . '%|_', $show_grants_dbname)
&& ! ereg('\\\\%|\\\\_', $show_grants_dbname))
if ((preg_match('/' . $re0 . '%|_/', $show_grants_dbname)
&& ! preg_match('/\\\\%|\\\\_/', $show_grants_dbname))
// does this db exist?
|| (! PMA_DBI_try_query('USE ' . ereg_replace($re1 . '(%|_)', '\\1\\3', $dbname_to_test))
|| (! PMA_DBI_try_query('USE ' . preg_replace('/' . $re1 . '(%|_)/', '\\1\\3', $dbname_to_test))
&& substr(PMA_DBI_getError(), 1, 4) != 1044)
) {
$db_to_create = ereg_replace($re0 . '_', '\\1?', $show_grants_dbname);
$db_to_create = ereg_replace($re0 . '%', '\\1...', $db_to_create);
$db_to_create = ereg_replace($re1 . '(%|_)', '\\1\\3', $db_to_create);
$is_create_db_priv = true;
if ($GLOBALS['cfg']['SuggestDBName']) {
$GLOBALS['db_to_create'] = preg_replace('/' . $re0 . '_/', '\\1?', $show_grants_dbname);
$GLOBALS['db_to_create'] = preg_replace('/' . $re0 . '%/', '\\1...', $GLOBALS['db_to_create']);
$GLOBALS['db_to_create'] = preg_replace('/' . $re1 . '(%|_)/', '\\1\\3', $GLOBALS['db_to_create']);
}
$GLOBALS['is_create_db_priv'] = true;
/**
* @todo collect $db_to_create into an array, to display a
* @todo collect $GLOBALS['db_to_create'] into an array, to display a
* drop-down in the "Create new database" dialog
*/
// we don't break, we want all possible databases
@@ -83,28 +140,17 @@ function PMA_analyseShowGrant($rs_usr, &$is_create_db_priv, &$db_to_create,
} // end elseif
} // end if
} // end while
PMA_DBI_free_result($rs_usr);
$_SESSION['is_create_db_priv'] = $GLOBALS['is_create_db_priv'];
$_SESSION['is_process_priv'] = $GLOBALS['is_create_db_priv'];
$_SESSION['is_reload_priv'] = $GLOBALS['is_create_db_priv'];
$_SESSION['db_to_create'] = $GLOBALS['is_create_db_priv'];
$_SESSION['dbs_where_create_table_allowed']
= $GLOBALS['is_create_db_priv'];
} // end function
// Detection for some CREATE privilege.
PMA_analyseShowGrant();
// Since MySQL 4.1.2, we can easily detect current user's grants
// using $userlink (no control user needed)
// and we don't have to try any other method for detection
// @todo fix to get really all privileges, not only explicitly defined for this user
// from MySQL manual: (http://dev.mysql.com/doc/refman/5.0/en/show-grants.html)
// SHOW GRANTS displays only the privileges granted explicitly to the named
// account. Other privileges might be available to the account, but they are not
// displayed. For example, if an anonymous account exists, the named account
// might be able to use its privileges, but SHOW GRANTS will not display them.
if ($rs_usr = PMA_DBI_try_query('SHOW GRANTS')) {
PMA_analyseShowGrant($rs_usr, $is_create_db_priv, $db_to_create, $is_reload_priv, $dbs_where_create_table_allowed);
PMA_DBI_free_result($rs_usr);
unset($rs_usr);
}
// If disabled, don't show it
if (!$cfg['SuggestDBName']) {
$db_to_create = '';
}
?>