joomla/jedchecker
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use a single regex match in the jexec rule

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This commit is contained in:
Denis Ryabov 2021-02-23 22:22:29 +03:00
parent 0a09a14fb3
commit 1a201318c6
1 changed files with 33 additions and 67 deletions
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100
administrator/components/com_jedchecker/libraries/rules/jexec.php
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@ -46,6 +46,13 @@ class JedcheckerRulesJexec extends JEDcheckerRule
*/
protected $description = 'COM_JEDCHECKER_RULE_PH2_DESC';
/**
* Regexp to match _JEXEC-like guard
*
* @var string
*/
protected $regex;
/**
* Initiates the file search and check
*
@ -53,6 +60,8 @@ class JedcheckerRulesJexec extends JEDcheckerRule
*/
public function check()
{
$this->init_jexec();
// Find all php files of the extension
$files = JFolder::files($this->basedir, '\.php$', true, true);
@ -86,79 +95,36 @@ class JedcheckerRulesJexec extends JEDcheckerRule
return true;
}
$content = preg_split('/(?:\r\n|\n|\r)(?!$)/', $content);
// check guards
if (preg_match($this->regex, $content))
{
return true;
}
// Get the constants to look for
return false;
}
/**
* Prepare regexp aforehand
*
* @return void
*/
protected function init_jexec()
{
$defines = $this->params->get('constants');
$defines = explode(',', $defines);
$hascode = 0;
foreach ($content AS $line)
foreach ($defines as $i => $define)
{
$tline = trim($line);
if ($tline == '' || $tline == '<?php' || $tline == '?>')
{
continue;
}
if ($tline['0'] != '/' && $tline['0'] != '*')
{
$hascode = 1;
}
// Search for "defined"
$pos_1 = stripos($line, 'defined');
// Skip the line if "defined" is not found
if ($pos_1 === false)
{
continue;
}
// Search for "die".
// "or" may not be present depending on syntax
$pos_3 = stripos($line, 'die');
// Check for "exit"
if ($pos_3 === false)
{
$pos_3 = stripos($line, 'exit');
// Skip the line if "die" or "exit" is not found
if ($pos_3 === false)
{
continue;
}
}
// Search for the constant name
foreach ($defines AS $define)
{
$define = trim($define);
// Search for the define
$pos_2 = strpos($line, $define);
// Skip the line if the define is not found
if ($pos_2 === false)
{
continue;
}
// Check the position of the words
if ($pos_2 > $pos_1 && $pos_3 > $pos_2)
{
unset($content);
return true;
}
}
$defines[$i] = preg_quote(trim($define), '#');
}
unset($content);
return $hascode ? false : true;
$this->regex
= '#^' // at the beginning of the file
. '<\?php\s+' // there is an opening php tag
. 'defined ?\( ?' // followed by defined test
. '([\'"])(?:' . implode('|', $defines) . ')\1' // of any of given constant
. ' ?\) ?(?:or |\|\| ?)(?:die|exit)\b' // or exit
. '#i'; // (case insensitive)
}
}