From 5da28b0f8771834ae208d61431d632875e9f8e7d Mon Sep 17 00:00:00 2001
From: Ruben Rodriguez <ruben@trisquel.info>
Date: Thu, 8 Sep 2022 20:18:54 -0400
Subject: Updated extensions:  * Upgraded Privacy Redirect to 1.1.49 and
 configured to use the 10 most reliable invidious instances  * Removed
 ViewTube  * Added torproxy@icecat.gnu based on 'Proxy toggle' extension  *
 Added jShelter 0.11.1  * Upgraded LibreJS to 7.21.0  * Upgraded HTTPS
 Everywhere to 2021.7.13  * Upgraded SubmitMe to 1.9

---
 .../jsr@javascriptrestrictor/wrapping.js           | 77 ++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 data/extensions/jsr@javascriptrestrictor/wrapping.js

(limited to 'data/extensions/jsr@javascriptrestrictor/wrapping.js')

diff --git a/data/extensions/jsr@javascriptrestrictor/wrapping.js b/data/extensions/jsr@javascriptrestrictor/wrapping.js
new file mode 100644
index 0000000..d2f20e4
--- /dev/null
+++ b/data/extensions/jsr@javascriptrestrictor/wrapping.js
@@ -0,0 +1,77 @@
+/** \file
+ * \brief Main file handling wrappers
+ *
+ *  \author Copyright (C) 2019  Libor Polcak
+ *
+ *  \license SPDX-License-Identifier: GPL-3.0-or-later
+ */
+//
+//  This program is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+//
+
+/**
+ * \defgroup wrappers JavaScript Shield
+ *
+ * \brief Wrappers are small pieces of code that modifies the original functionalty of a function,
+ * or property defined by standards.
+ *
+ * $(PROJECT_NAME) defines wrappers to modify the behaviour of the JavaScript environment. The
+ * purpose of the most of the wrappers can be divided into several categories:
+ *
+ * * Block APIs: some APIs are not generally needed and can be blocked for most of the pages.
+ * * Precision reduction: The returned value is too precise which might result into attacks on the
+ * browser or can be used to fingerprint users.
+ * * Hide information: Some APIs provide information that is not generally needed and can be hidden
+ * from most of the pages.
+ * * Provide fake information: We provide fake information mostly to confuse fingerprinters.
+ */
+
+/**
+ * The object carrying all the wrappers
+ */
+var build_wrapping_code = {};
+
+/**
+ * Adds a list of wrapping objects to the build_wrapping_code.
+ *
+ * This function is called from each wrapper in its file.
+ */
+function add_wrappers(wrappers) {
+	for (wrapper of wrappers) {
+		build_wrapping_code[wrapper.parent_object + "." + wrapper.parent_object_property] = wrapper;
+	}
+}
+
+/**
+ * Function to be used by wrapped code used for rounding
+ */
+var rounding_function = `function rounding_function(numberToRound, precision) {
+	return numberToRound - (numberToRound % Math.pow(10, Math.max(3 - precision)));
+}`;
+
+/**
+ * Function to be used by wrapped code for adding randomized noise
+ */
+var noise_function = `let lastValue = 0;
+	function noise_function(numberToChange, precision) {
+    const noise = Math.floor(Math.random() * Math.pow(10, 3 - precision));
+    const arr = (numberToChange + '').split('.');
+    const number = parseInt(arr[0]);
+    const decimal = parseInt(arr[1]);
+    var value = number - (number % noise) + parseFloat('0.' + (decimal - (decimal % noise)));
+    if (lastValue < value) {
+        lastValue = value;
+    }
+    return lastValue;
+}`;
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