From 6854cb3f4d8219cf1829e32122eb2502a916eae9 Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Sat, 1 Feb 2020 09:05:48 +0100
Subject: initial checkin

---
 includes/class.gpc.php | 257 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 257 insertions(+)
 create mode 100644 includes/class.gpc.php

(limited to 'includes/class.gpc.php')

diff --git a/includes/class.gpc.php b/includes/class.gpc.php
new file mode 100644
index 0000000..88235ef
--- /dev/null
+++ b/includes/class.gpc.php
@@ -0,0 +1,257 @@
+<?php
+//  {{{ class  Req
+/**
+ * Flyspray
+ *
+ * GPC classes
+ *
+ * This script contains classes for $_GET, $_REQUEST, $_POST and $_COOKIE
+ * to safely retrieve values. Example: Get::val('foo', 'bar') to get $_GET['foo'] or 'bar' if 
+ * the key does not exist. 
+ *
+ * @license http://opensource.org/licenses/lgpl-license.php Lesser GNU Public License
+ * @package flyspray
+ * @author Pierre Habouzit
+ */
+ 
+abstract class Req
+{
+    public static function has($key)
+    {
+        return isset($_REQUEST[$key]);
+    }
+
+    public static function val($key, $default = null)
+    {
+        return Req::has($key) ? $_REQUEST[$key] : $default;
+    }
+
+    //it will always return a number no matter what(null is 0)
+    public static function num($key, $default = null)
+    {
+        return Filters::num(Req::val($key, $default));
+    }
+    
+    public static function enum($key, $options, $default = null)
+    {
+        return Filters::enum(Req::val($key, $default), $options);
+    }
+
+    //always a string (null is typed to an empty string)
+    public static function safe($key)
+    {
+        return Filters::noXSS(Req::val($key));
+    }
+
+    public static function isAlnum($key)
+    {
+        return Filters::isAlnum(Req::val($key));
+    }
+
+	/**
+	 * Overwrites or sets a request value
+	 */
+	public static function set($key, $value = null) {
+		$_REQUEST[$key] = $value;
+	}
+}
+
+ // }}}
+// {{{ class Post
+
+abstract class Post
+{
+    public static function has($key)
+    {
+        // XXX semantics is different for POST, as POST of '' values is never
+        //     unintentionnal, whereas GET/COOKIE may have '' values for empty
+        //     ones.
+        return isset($_POST[$key]);
+    }
+
+    public static function val($key, $default = null)
+    {
+        return Post::has($key) ? $_POST[$key] : $default;
+    }
+
+    //it will always return a number no matter what(null is 0)
+    public static function num($key, $default = null)
+    {
+        return Filters::num(Post::val($key, $default));
+    }
+
+    //always a string (null is typed to an empty string)
+    public static function safe($key)
+    {
+        return Filters::noXSS(Post::val($key));
+    }
+
+    public static function isAlnum($key)
+    {
+        return Filters::isAlnum(Post::val($key));
+    }
+}
+
+// }}}
+// {{{ class Get
+
+abstract class Get
+{
+    public static function has($key)
+    {
+        return isset($_GET[$key]) && $_GET[$key] !== '';
+    }
+
+    public static function val($key, $default = null)
+    {
+        return Get::has($key) ? $_GET[$key] : $default;
+    }
+
+    //it will always return a number no matter what(null is 0)
+    public static function num($key, $default = null)
+    {
+        return Filters::num(Get::val($key, $default));
+    }
+
+    //always a string (null is typed to an empty string)
+    public static function safe($key)
+    {
+        return Filters::noXSS(Get::val($key));
+    }
+
+    public static function enum($key, $options, $default = null)
+    {
+        return Filters::enum(Get::val($key, $default), $options);
+    }
+
+}
+
+// }}}
+//{{{ class  Cookie
+
+abstract class Cookie
+{
+    public static function has($key)
+    {
+        return isset($_COOKIE[$key]) && $_COOKIE[$key] !== '';
+    }
+
+    public static function val($key, $default = null)
+    {
+        return Cookie::has($key) ? $_COOKIE[$key] : $default;
+    }
+}
+//}}}
+/** 
+ * Class Filters
+ *
+ * This is a simple class for safe input validation
+ * no mixed stuff here, functions returns always the same type.
+ * @author Cristian Rodriguez R <judas.iscariote@flyspray.org>
+ * @license BSD
+ * @notes this intented to be used by Flyspray internals functions/methods
+ * please DO NOT use this in templates , if the code processing the input there 
+ * is not safe, please fix the underlying problem.
+ */
+abstract class Filters {
+    /**
+     * give me a number only please?
+     * @param mixed $data
+     * @return int
+     * @access public static
+     * @notes changed before 0.9.9 to avoid strange results
+     * with arrays and objects
+     */
+    public static function num($data)
+    {
+         return intval($data); // no further checks here please
+    }
+    
+    /**
+     * Give user input free from potentially mailicious html
+     * @param mixed $data
+     * @return string htmlspecialchar'ed
+     * @access public static
+     */
+    public static function noXSS($data)
+    {
+        if(empty($data) || is_numeric($data)) {
+            return $data;
+        } elseif(is_string($data)) {
+            return htmlspecialchars($data, ENT_QUOTES, 'utf-8');
+        }
+        return '';
+    }
+    
+    /**
+     * Give user input free from potentially mailicious html and JS insertions
+     * @param mixed $data
+     * @return string
+     * @access public static
+     */
+    public static function noJsXSS($data)
+    {
+        if(empty($data) || is_numeric($data)) {
+            return $data;
+        } elseif(is_string($data)) {
+            return Filters::noXSS(preg_replace("/[\x01-\x1F\x7F]|\xC2[\x80-\x9F]/", "", addcslashes($data, "\t\"'\\")));
+        }
+        return '';
+    }
+    
+    /**
+     * is $data alphanumeric eh ?
+     * @param string $data string value to check
+     * @return bool
+     * @access public static
+     * @notes unfortunately due to a bug in PHP < 5.1 
+     * http://bugs.php.net/bug.php?id=30945 ctype_alnum
+     * returned true on empty string, that's the reason why
+     * we have to use strlen too.
+     * 
+     * Be aware: $data MUST be an string, integers or any other
+     * type is evaluated to FALSE
+     */
+    public static function isAlnum($data)
+    {
+        return ctype_alnum($data) && strlen($data);
+    }
+
+    /**
+     * Checks if $data is a value of $options and returns the first element of
+     * $options if it is not (for input validation if all possible values are known)
+     * @param mixed $data
+     * @param array $options
+     * @return mixed
+     * @access public static
+     */
+    public static function enum($data, $options)
+    {
+        if (!in_array($data, $options) && isset($options[0])) {
+            return $options[0];
+        }
+        
+        return $data;
+    }
+
+    public static function escapeqs($qs)
+    {
+            parse_str($qs, $clean_qs);
+            return http_build_query($clean_qs);
+    }
+}
+
+/**
+ * A basic function which works like the GPC classes above for any array
+ * @param array $array
+ * @param mixed $key
+ * @param mixed $default
+ * @return mixed
+ * @version 1.0
+ * @since 0.9.9
+ * @see Backend::get_task_list()
+ */
+function array_get(&$array, $key, $default = null)
+{
+    return (isset($array[$key])) ? $array[$key] : $default;
+}
-- 
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