From e5d50688df549539cdf62387d1eca4b3c07aac8e Mon Sep 17 00:00:00 2001
From: Christopher Weldon <bowzer@users.sourceforge.net>
Date: Sat, 7 Jul 2007 15:07:35 +0000
Subject: Bugfix for 1740062
 (https://sourceforge.net/tracker/index.php?func=detail&aid=1740062&group_id=62270&atid=500017)

---
 functions/sanitize.php | 41 +++++++++++++++++++++++++++++++++++++----
 1 file changed, 37 insertions(+), 4 deletions(-)

(limited to 'functions')

diff --git a/functions/sanitize.php b/functions/sanitize.php
index 4b5e883..a9e72ee 100644
--- a/functions/sanitize.php
+++ b/functions/sanitize.php
@@ -1,4 +1,37 @@
 <?php
+/**
+ * Sanitizes variables and arrays in a recursive manner
+ *
+ * This method was created as a result of strip_tags() happening on an array
+ * would destroy the contents of the array. Thus, in order to avoid this from
+ * happening we need checks to see if something is an array and to process
+ * it as such.
+ *
+ * The only sanitizing this method provides is stripping non-allowed tags.
+ *
+ * @author Christopher Weldon <cweldon@tamu.edu>
+ * @param mixed $value Value to be sanitized
+ * @return mixed
+ */
+function recursiveSanitize($value) {
+    if (is_array($value)) {
+        $valmod = array();
+        foreach ($value as $key => $subval) {
+            if (is_array($subval)) {
+                $subval = recursiveSanitize($subval);
+            } else {
+                $subval = strip_tags($subval);
+            }
+            $valmod[$key] = $subval;
+        }
+        $value = $valmod;
+    } else {
+        $value = strip_tags($value);
+    }
+    
+    return $value;
+}
+
 foreach ($_REQUEST as $key=>$val){
 	switch ($key){
 		case 'event_data':
@@ -8,7 +41,7 @@ foreach ($_REQUEST as $key=>$val){
 			break;
 		default:	
 			# cpath
-			$val = strip_tags($val);
+			$val = recursiveSanitize($val);
 	}
 
 	$_REQUEST[$key] = $val;
@@ -24,7 +57,7 @@ foreach ($_POST as $key=>$val){
 			if (!is_numeric($val)) $val = '';
 			break;
 		default:	
-			$val = strip_tags($val);
+			$val = recursiveSanitize($val);
 	}
 	$_POST[$key] = $val;
 
@@ -46,7 +79,7 @@ foreach ($_GET as $key=>$val){
 			if (!is_numeric($val)) $val = ''; 
 			break;
 		default:	
-			$val = strip_tags($val);
+			$val = recursiveSanitize($val);
 	}
 	if ($key != 'cal') $_GET[$key] = $val;
 
@@ -57,7 +90,7 @@ foreach ($_COOKIE as $key=>$val){
 			if (!is_numeric($val)) $val = '';
 			break;
 		default:	
-		$val = strip_tags($val);
+		$val = recursiveSanitize($val);
 	}
 	$_COOKIE[$key] = $val;
 }
-- 
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