diff vendor/drupal/coder/coder_sniffer/Drupal/Sniffs/Semantics/PregSecuritySniff.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/drupal/coder/coder_sniffer/Drupal/Sniffs/Semantics/PregSecuritySniff.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,96 @@
+<?php
+/**
+ * Drupal_Sniffs_Semantics_PregSecuritySniff.
+ *
+ * @category PHP
+ * @package  PHP_CodeSniffer
+ * @link     http://pear.php.net/package/PHP_CodeSniffer
+ */
+
+/**
+ * Check the usage of the preg functions to ensure the insecure /e flag isn't
+ * used: https://www.drupal.org/node/750148
+ *
+ * @category PHP
+ * @package  PHP_CodeSniffer
+ * @link     http://pear.php.net/package/PHP_CodeSniffer
+ */
+class Drupal_Sniffs_Semantics_PregSecuritySniff extends Drupal_Sniffs_Semantics_FunctionCall
+{
+
+
+    /**
+     * Returns an array of function names this test wants to listen for.
+     *
+     * @return array
+     */
+    public function registerFunctionNames()
+    {
+        return array(
+                'preg_filter',
+                'preg_grep',
+                'preg_match',
+                'preg_match_all',
+                'preg_replace',
+                'preg_replace_callback',
+                'preg_split',
+               );
+
+    }//end registerFunctionNames()
+
+
+    /**
+     * Processes this function call.
+     *
+     * @param PHP_CodeSniffer_File $phpcsFile    The file being scanned.
+     * @param int                  $stackPtr     The position of the function call in
+     *                                           the stack.
+     * @param int                  $openBracket  The position of the opening
+     *                                           parenthesis in the stack.
+     * @param int                  $closeBracket The position of the closing
+     *                                           parenthesis in the stack.
+     *
+     * @return void
+     */
+    public function processFunctionCall(
+        PHP_CodeSniffer_File $phpcsFile,
+        $stackPtr,
+        $openBracket,
+        $closeBracket
+    ) {
+        $tokens   = $phpcsFile->getTokens();
+        $argument = $this->getArgument(1);
+
+        if ($argument === false) {
+            return;
+        }
+
+        if ($tokens[$argument['start']]['code'] !== T_CONSTANT_ENCAPSED_STRING) {
+            // Not a string literal.
+            // @TODO: Extend code to recognize patterns in variables.
+            return;
+        }
+
+        $pattern = $tokens[$argument['start']]['content'];
+        $quote   = substr($pattern, 0, 1);
+        // Check that the pattern is a string.
+        if ($quote === '"' || $quote === "'") {
+            // Get the delimiter - first char after the enclosing quotes.
+            $delimiter = preg_quote(substr($pattern, 1, 1), '/');
+            // Check if there is the evil e flag.
+            if (preg_match('/'.$delimiter.'[\w]{0,}e[\w]{0,}$/', substr($pattern, 0, -1)) === 1) {
+                $warn = 'Using the e flag in %s is a possible security risk. For details see https://www.drupal.org/node/750148';
+                $phpcsFile->addError(
+                    $warn,
+                    $argument['start'],
+                    'PregEFlag',
+                    array($tokens[$stackPtr]['content'])
+                );
+                return;
+            }
+        }
+
+    }//end processFunctionCall()
+
+
+}//end class