Get rid of eval.

lib/extension.js

@@ -44,5 +44,31 @@
 	};
 	Object.seal(scope.message);
 	
+	scope.getWrapped = function getWrapped(obj){
+		return obj && (obj.wrappedJSObject || obj);
+	};
+	
+	scope.exportFunctionWithName = function exportFunctionWithName(func, context, name){
+		const exportedTry = exportFunction(func, context);
+		if (exportedTry.name === name){
+			return exportedTry;
+		}
+		else {
+			const wrappedContext = scope.getWrapped(context);
+			const options = {
+				defineAs: name
+			};
+			const oldDescriptor = Object.getOwnPropertyDescriptor(wrappedContext, name);
+			const exported = exportFunction(func, context, options);
+			if (oldDescriptor){
+				Object.defineProperty(wrappedContext, name, oldDescriptor);
+			}
+			else {
+				delete wrappedContext[name];
+			}
+			return exported;
+		}
+	};
+	
 	Object.seal(scope);
 }());

lib/frame.js

@@ -9,7 +9,6 @@
 	const {ask} = require("./askForPermission");
 	const {sha256String: hashing} = require("./hash");
 	const {check: originalCheck, checkStack: originalCheckStack} = require("./check");
-	const {getWrapped} = require("./modifiedAPIFunctions");
 	const extension = require("./extension");
 	const iframeProtection = require("./iframeProtection");
 	
@@ -133,7 +132,7 @@
 		try {
 			// eslint-disable-next-line no-unused-vars
 			const href = window.location.href;
-			wrappedTry = getWrapped(window);
+			wrappedTry = extension.getWrapped(window);
 		}
 		catch (error){
 			// we are unable to read the location due to SOP

lib/iframeProtection.js

@@ -13,6 +13,7 @@
 	}
 	
 	const settings = require("./settings");
+	const extension = require("./extension");
 	const lists = require("./lists");
 	
 	function isWhitelisted(url){
@@ -129,40 +130,42 @@
 			protectionDefinition.methods.forEach(function(method){
 				const descriptor = Object.getOwnPropertyDescriptor(object, method);
 				const original = descriptor.value;
-				changeProperty(object, method, "value", exportFunction(eval(`(function ${method}(){
+				changeProperty(object, method, "value", extension.exportFunctionWithName(function method(){
 					const value = arguments.length?
 						original.apply(this, window.Array.from(arguments)):
 						original.call(this);
 					allCallback();
 					return value;
-				})`), window));
+				}, window, method));
 			});
 			protectionDefinition.getters.forEach(function(property){
-				const temp = eval(`({
-					get ${property}(){
-						const ret = this.${property};
+				const descriptor = Object.getOwnPropertyDescriptor(object, property);
+				const temp = {
+					get [property](){
+						const ret = this[property];
 						allCallback();
 						return ret;
 					}
-				})`);
-				changeProperty(object, property, "get", exportFunction(
+				};
+				changeProperty(object, property, "get", extension.exportFunctionWithName(
 					Object.getOwnPropertyDescriptor(temp, property).get,
-					window
+					window,
+					descriptor.get
 				));
 			});
 			protectionDefinition.setters.forEach(function(property){
 				const descriptor = Object.getOwnPropertyDescriptor(object, property);
 				const setter = descriptor.set;
-				const temp = eval(`({
-					set ${property}(value){
+				const temp = {
+					set [property](value){
 						const ret = setter.call(this, value);
 						// const ret = this.${property} = value;
 						allCallback();
 						return ret;
 					}
-				})`);
-				changeProperty(object, property, "set", exportFunction(
-					Object.getOwnPropertyDescriptor(temp, property).set, window
+				};
+				changeProperty(object, property, "set", extension.exportFunctionWithName(
+					Object.getOwnPropertyDescriptor(temp, property).set, window, setter.name
 				));
 			});
 		});

lib/intercept.js

@@ -14,7 +14,6 @@
 	
 	const {changedFunctions, changedGetters, setRandomSupply} = require("./modifiedAPI");
 	const randomSupplies = require("./randomSupplies");
-	const {getWrapped} = require("./modifiedAPIFunctions");
 	const logging = require("./logging");
 	const settings = require("./settings");
 	const extension = require("./extension");
@@ -68,7 +67,7 @@
 				[changedFunction.object]
 		).map(function(name){
 			if (name){
-				const constructor = getWrapped(windowToProcess)[name];
+				const constructor = extension.getWrapped(windowToProcess)[name];
 				if (constructor){
 					return constructor.prototype;
 				}
@@ -77,7 +76,7 @@
 		}).concat(
 			changedFunction.objectGetters?
 				changedFunction.objectGetters.map(function(objectGetter){
-					return objectGetter(getWrapped(windowToProcess));
+					return objectGetter(extension.getWrapped(windowToProcess));
 				}):
 				[]
 		);
@@ -96,7 +95,7 @@
 		changedGetters.forEach(function(changedGetter){
 			const name = changedGetter.name;
 			changedGetter.objectGetters.forEach(function(changedGetter){
-				const object = changedGetter(getWrapped(windowToProcess));
+				const object = changedGetter(extension.getWrapped(windowToProcess));
 				if (object){
 					callback({name, object, objectGetter: changedGetter});
 				}
@@ -359,7 +358,7 @@
 			logging.verbose("status for", changedGetter, ":", functionStatus);
 			if (functionStatus.active){
 				changedGetter.objectGetters.forEach(function(objectGetter){
-					const object = objectGetter(getWrapped(windowToProcess));
+					const object = objectGetter(extension.getWrapped(windowToProcess));
 					if (object){
 						const descriptor = Object.getOwnPropertyDescriptor(object, name);
 						if (descriptor && descriptor.hasOwnProperty("get")){
@@ -369,15 +368,16 @@
 								window: windowToProcess, prefs, checkStack, ask, notify
 							});
 							const getter = changedGetter.getterGenerator(checker, original, windowToProcess);
-							descriptor.get = exportFunction(getter, windowToProcess);
+							descriptor.get = extension.exportFunctionWithName(getter, windowToProcess, original.name);
 							
-							if (descriptor.hasOwnProperty("set") && changedGetter.setterGenerator){
+							if (descriptor.hasOwnProperty("set") && descriptor.set && changedGetter.setterGenerator){
+								const original = descriptor.set;
 								const setter = changedGetter.setterGenerator(
 									windowToProcess,
-									descriptor.set,
+									original,
 									prefs
 								);
-								descriptor.set = exportFunction(setter, windowToProcess);
+								descriptor.set = extension.exportFunctionWithName(setter, windowToProcess, original.name);
 							}
 							
 							Object.defineProperty(object, name, descriptor);

lib/modifiedAPIFunctions.js

@@ -12,10 +12,6 @@
 		scope = require.register("./modifiedAPIFunctions", {});
 	}
 	
-	scope.getWrapped = function getWrapped(obj){
-		return obj && (obj.wrappedJSObject || obj);
-	};
-	
 	scope.checkerWrapper = function checkerWrapper(checker, object, args, callback){
 		const check = checker.call(object);
 		if (check.allow){

lib/modifiedCanvasAPI.js

@@ -7,8 +7,9 @@
 	const scope = ((typeof exports) !== "undefined")? exports: require.register("./modifiedCanvasAPI");
 	const colorStatistics = require("./colorStatistics");
 	const logging = require("./logging");
+	const extension = require("./extension");
 	const {copyCanvasToWebgl} = require("./webgl");
-	const {getWrapped, checkerWrapper} = require("./modifiedAPIFunctions");
+	const {checkerWrapper} = require("./modifiedAPIFunctions");
 	
 	let randomSupply = null;
 	
@@ -23,8 +24,8 @@
 		let imageData;
 		let source;
 		if ((context.canvas.width || 0) * (context.canvas.height || 0) === 0){
-			imageData = new (getWrapped(window).ImageData)(0, 0);
-			source = new (getWrapped(window).ImageData)(0, 0);
+			imageData = new (extension.getWrapped(window).ImageData)(0, 0);
+			source = new (extension.getWrapped(window).ImageData)(0, 0);
 		}
 		else if (context instanceof window.CanvasRenderingContext2D){
 			imageData = window.CanvasRenderingContext2D.prototype.getImageData.call(
@@ -35,7 +36,7 @@
 			source = imageData.data;
 		}
 		else {
-			imageData = new (getWrapped(window).ImageData)(context.canvas.width, context.canvas.height);
+			imageData = new (extension.getWrapped(window).ImageData)(context.canvas.width, context.canvas.height);
 			source = new Uint8Array(imageData.data.length);
 			(
 				context instanceof window.WebGLRenderingContext?

lib/modifiedDOMRectAPI.js

@@ -12,7 +12,8 @@
 		scope = require.register("./modifiedDOMRectAPI", {});
 	}
 	
-	const {getWrapped, checkerWrapper, setProperties, getStatusByFlag} = require("./modifiedAPIFunctions");
+	const extension = require("./extension");
+	const {checkerWrapper, setProperties, getStatusByFlag} = require("./modifiedAPIFunctions");
 	const {byteArrayToString: hash} = require("./hash");
 	
 	
@@ -30,7 +31,7 @@
 	
 	const registeredRects = new WeakMap();
 	function registerDOMRect(domRect, notify, window, prefs){
-		registeredRects.set(getWrapped(domRect), {
+		registeredRects.set(extension.getWrapped(domRect), {
 			notify: function(){
 				let done = false;
 				return function(message){
@@ -45,7 +46,7 @@
 		});
 	}
 	function getDOMRectRegistration(domRect){
-		return registeredRects.get(getWrapped(domRect));
+		return registeredRects.get(extension.getWrapped(domRect));
 	}
 	
 	const cache = {};
@@ -159,8 +160,8 @@
 				],
 			name: property,
 			getterGenerator: function(){
-				const temp = eval(`({
-					get ${property}(){
+				const temp = {
+					get [property](){
 						const registration = getDOMRectRegistration(this);
 						if (registration){
 							return getFakeDomRect(
@@ -168,24 +169,24 @@
 								this,
 								registration.prefs,
 								registration.notify
-							).${property};
+							)[property];
 						}
-						return this.${property};
+						return this[property];
 					}
-				})`);
+				};
 				return Object.getOwnPropertyDescriptor(temp, property).get;
 			}
 		};
 		if (!readonly){
 			changedGetter.setterGenerator = function(window, original, prefs){
-				const temp = eval(`({
-					set ${property}(newValue){
+				const temp = {
+					set [property](newValue){
 						const registration = getDOMRectRegistration(this);
 						if (registration){
 							const fakeDomRect = getFakeDomRect(window, this, prefs, registration.notify);
-							registeredRects.delete(getWrapped(this));
+							registeredRects.delete(extension.getWrapped(this));
 							["x", "y", "width", "height"].forEach((prop) => {
-								if (prop === "${property}"){
+								if (prop === property){
 									this[prop] = newValue;
 								}
 								else {
@@ -197,7 +198,7 @@
 							original.apply(this, window.Array.from(arguments));
 						}
 					}
-				})`);
+				};
 				return Object.getOwnPropertyDescriptor(temp, property).set;
 			};
 		}

lib/modifiedNavigatorAPI.js

@@ -20,19 +20,19 @@
 			objectGetters: [function(window){return window.Navigator && window.Navigator.prototype;}],
 			name: property,
 			getterGenerator: function(checker){
-				const temp = eval(`({
-					get ${property}(){
+				const temp = {
+					get [property](){
 						return checkerWrapper(checker, this, arguments, function(args, check){
 							const {notify, window, original} = check;
 							const originalValue = original.apply(this, window.Array.from(args));
-							const returnValue = navigator.getNavigatorValue("${property}");
+							const returnValue = navigator.getNavigatorValue(property);
 							if (originalValue !== returnValue){
 								notify("fakedNavigatorReadout");
 							}
 							return returnValue;
 						});
 					}
-				})`);
+				};
 				return Object.getOwnPropertyDescriptor(temp, property).get;
 			}
 		};

test/detectionTest.js

@@ -205,6 +205,17 @@ addTest("function name", function(log){
 		},
 	].map(checkName).some(function(b){return b;});
 });
+addTest("exposed getters or setters", function(log){
+	"use strict";
+	
+	return Object.keys(window).filter(function(key){
+		if (/^(get|set) /.test(key)){
+			log("found exposed function", JSON.stringify(key));
+			return true;
+		}
+		return false;
+	}).length !== 0;
+});
 addTest("property descriptor", function(log){
 	"use strict";
 	

test/iframeTest.html

@@ -88,7 +88,16 @@
 			"use strict";
 			
 			document.body.innerHTML = "<iframe></iframe>";
-			console.log("TEST:", "innerHTML after 1000ms:", compare(test(window[0]), reference));
+			log("TEST:", "innerHTML after 1000ms:", compare(test(window[0]), reference));
+			
+			var iFrame = document.createElement("iframe");
+			document.body.appendChild(iFrame);
+			log("TEST:", "appendChild after 1000ms:", compare(test(window[1]), reference));
+			
+			var iFrame2 = document.createElement("iframe");
+			iFrame.replaceWith(iFrame2);
+			log("TEST:", "replaceWith after 1000ms:", compare(test(window[1]), reference));
+			
 			document.body.innerHTML = "<h1>Iframe protection</h1>" +
 				"Open console (Ctrl + Shift + K) to see results. " +
 				"Depending on your Browser version you might have to check the \"Persist Logs\" flag and reload the page.<br>" +