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-rw-r--r--src/content/DocumentCSP.js29
-rw-r--r--src/content/PlaceHolder.js26
-rw-r--r--src/content/content.js211
-rw-r--r--src/content/dynamicNS.js21
-rw-r--r--src/content/embeddingDocument.js20
-rw-r--r--src/content/media.js4
-rw-r--r--src/content/staticNS.js99
-rw-r--r--src/content/webglHook.js4
8 files changed, 224 insertions, 190 deletions
diff --git a/src/content/DocumentCSP.js b/src/content/DocumentCSP.js
new file mode 100644
index 0000000..371e547
--- /dev/null
+++ b/src/content/DocumentCSP.js
@@ -0,0 +1,29 @@
+'use strict';
+
+class DocumentCSP {
+ constructor(document) {
+ this.document = document;
+ this.builder = new CapsCSP();
+ }
+
+ apply(capabilities, embedding = CSP.isEmbedType(this.document.contentType)) {
+ let csp = this.builder;
+ let blocker = csp.buildFromCapabilities(capabilities, embedding);
+ if (!blocker) return;
+
+ let document = this.document;
+ let header = csp.asHeader(blocker);
+ let meta = document.createElementNS("http://www.w3.org/1999/xhtml", "meta");
+ meta.setAttribute("http-equiv", header.name);
+ meta.setAttribute("content", header.value);
+ let parent = document.head || document.documentElement;
+ try {
+ parent.insertBefore(meta, parent.firstChild);
+ debug(`Failsafe <meta> CSP inserted in the DOM: "%s"`, header.value);
+ if (capabilities.has("script")) meta.remove();
+ } catch (e) {
+ error(e, "Error inserting CSP %s in the DOM", header && header.value);
+ }
+ }
+
+}
diff --git a/src/content/PlaceHolder.js b/src/content/PlaceHolder.js
index ec2ab5b..09f6767 100644
--- a/src/content/PlaceHolder.js
+++ b/src/content/PlaceHolder.js
@@ -1,6 +1,17 @@
var PlaceHolder = (() => {
const HANDLERS = new Map();
-
+
+ let checkStyle = async () => {
+ checkStyle = () => {};
+ if (!ns.embeddingDocument) return;
+ let replacement = document.querySelector("a.__NoScript_PlaceHolder__");
+ if (!replacement) return;
+ if (window.getComputedStyle(replacement, null).opacity !== "0.8") {
+ document.head.appendChild(createHTMLElement("style")).textContent = await
+ (await fetch(browser.extension.getURL("/content/content.css"))).text();
+ }
+ }
+
class Handler {
constructor(type, selector) {
this.type = type;
@@ -9,6 +20,7 @@ var PlaceHolder = (() => {
HANDLERS.set(type, this);
}
filter(element, request) {
+ if (request.embeddingDocument) return true;
let url = request.initialUrl || request.url;
return "data" in element ? element.data === url : element.src === url;
}
@@ -77,10 +89,14 @@ var PlaceHolder = (() => {
.filter(element => this.handler.filter(element, request))
.forEach(element => this.replace(element));
};
- if (this.replacements.size) PlaceHolder.listen();
+ if (this.replacements.size) {
+ PlaceHolder.listen();
+ checkStyle();
+ }
}
replace(element) {
+ if (!element.parentElement) return;
let {
url
} = this.request;
@@ -108,10 +124,10 @@ var PlaceHolder = (() => {
replacement._placeHolderObj = this;
replacement._placeHolderElement = element;
- this.replacements.add(replacement);
+
- if (element.parentNode) element.parentNode.replaceChild(replacement, element);
- else document.body.appendChild(replacement);
+ element.parentNode.replaceChild(replacement, element);
+ this.replacements.add(replacement);
}
async enable(replacement) {
diff --git a/src/content/content.js b/src/content/content.js
index 8ab3654..c7fc045 100644
--- a/src/content/content.js
+++ b/src/content/content.js
@@ -1,105 +1,12 @@
'use strict';
+// debug = () => {}; // REL_ONLY
- // debug = () => {}; // REL_ONLY
-{
- let listenersMap = new Map();
- let backlog = new Set();
- var ns = {
- on(eventName, listener) {
- let listeners = listenersMap.get(eventName);
- if (!listeners) listenersMap.set(eventName, listeners = new Set());
- listeners.add(listener);
- if (backlog.has(eventName)) this.fire(eventName, listener);
- },
- detach(eventName, listener) {
- let listeners = listenersMap.get(eventName);
- if (listeners) listeners.delete(listener);
- },
- fire(eventName, listener = null) {
- if (listener) {
- listener({type:eventName, source: this});
- return;
- }
- let listeners = listenersMap.get(eventName);
- if (listeners) {
- for (let l of listeners) {
- this.fire(eventName, l);
- }
- }
- backlog.add(eventName);
- },
- setup(DEFAULT, MARKER) {
- this.perms.DEFAULT = DEFAULT;
- if(!this.perms.CURRENT) this.perms.CURRENT = DEFAULT;
-
- // ugly hack: since now we use registerContentScript instead of the
- // filterRequest dynamic script injection hack, we use top.name
- // to store per-tab information. We don't want web content to
- // mess with it, though, so we wrap it around auto-hiding accessors
- this.perms.MARKER = MARKER;
- let eraseTabInfoRx = new RegExp(`[^]*${MARKER},?`);
- if (eraseTabInfoRx.test(top.name)) {
- let _name = top.name;
- let tabInfoRx = new RegExp(`^${MARKER}\\[([^]*?)\\]${MARKER},`);
- if (top === window) { // wrap to hide
- Reflect.defineProperty(top.wrappedJSObject, "name", {
- get: exportFunction(() => top.name.replace(eraseTabInfoRx, ""), top.wrappedJSObject),
- set: exportFunction(value => {
- let preamble = top.name.match(tabInfoRx);
- top.name = `${preamble && preamble[0] || ""}${value}`;
- return value;
- }, top.wrappedJSObject)
- });
- }
- let tabInfoMatch = _name.match(tabInfoRx);
- if (tabInfoMatch) try {
- this.perms.tabInfo = JSON.parse(tabInfoMatch[1]);
- } catch (e) {
- error(e);
- }
- }
-
- if (!this.perms.DEFAULT || this.perms.tabInfo.unrestricted) {
- this.allows = () => true;
- }
- ns.fire("perms");
- },
- perms: { DEFAULT: null, CURRENT: null, tabInfo: {}, MARKER: "" },
- allows(cap) {
- let perms = this.perms.CURRENT;
- return perms && perms.capabilities.includes(cap);
- },
- getWindowName() {
- return top !== window || !this.perms.MARKER ? window.name
- : window.name.split(this.perms.MARKER + ",").pop();
- }
- }
-}
-
-var canScript = true, shouldScript = false;
-
-let now = () => performance.now() + performance.timeOrigin;
+var _ = browser.i18n.getMessage;
function createHTMLElement(name) {
return document.createElementNS("http://www.w3.org/1999/xhtml", name);
}
-function probe() {
- try {
- debug("Probing execution...");
- let s = document.createElement("script");
- s.textContent = ";";
- document.documentElement.appendChild(s);
- s.remove();
- } catch(e) {
- debug(e);
- }
-}
-
-var _ = browser.i18n.getMessage;
-
-var embeddingDocument = false;
-
var seen = {
_map: new Map(),
_list: null,
@@ -121,9 +28,8 @@ Messages.addHandler({
seen.record(event);
}
if (ownFrame) {
- init();
if (!allowed && PlaceHolder.canReplace(policyType)) {
- request.embeddingDocument = embeddingDocument;
+ request.embeddingDocument = ns.embeddingDocument;
PlaceHolder.create(policyType, request);
}
}
@@ -135,87 +41,38 @@ Messages.addHandler({
}
});
-if (document.readyState !== "complete") {
- let pageshown = e => {
- removeEventListener("pageshow", pageshown);
- init();
- };
- addEventListener("pageshow", pageshown);
-} else {
- init(true);
-}
-let notifyPage = async () => {
+
+debug(`Loading NoScript in document %s, scripting=%s, readyState %s`,
+ document.URL, ns.canScript, document.readyState);
+
+var notifyPage = async () => {
debug("Page %s shown, %s", document.URL, document.readyState);
if (document.readyState === "complete") {
try {
- await Messages.send("pageshow", {seen: seen.list, canScript});
+ if (!("canScript" in ns)) {
+ let childPolicy = await Messages.send("fetchChildPolicy", {url: document.URL, contextUrl: top.location.href});
+ ns.config.CURRENT = childPolicy.CURRENT;
+ ns.setup(childPolicy.DEFAULT, childPolicy.MARKER);
+ return;
+ }
+
+ await Messages.send("pageshow", {seen: seen.list, canScript: ns.canScript});
return true;
} catch (e) {
debug(e);
+ if (/Receiving end does not exist/.test(e.message)) {
+ window.setTimeout(notifyPage, 2000);
+ }
}
}
return false;
}
-var queryingStatus = false;
-
-function reload(noCache = false) {
- init = () => {};
- location.reload(noCache);
-}
+notifyPage();
-async function init(oldPage = false) {
- if (queryingStatus) return;
- if (!document.URL.startsWith("http")) {
- return;
- }
- queryingStatus = true;
+window.addEventListener("pageshow", notifyPage);
- debug(`init() called in document %s, contentType %s readyState %s, frameElement %o`,
- document.URL, document.contentType, document.readyState, window.frameElement && frameElement.data);
-
- try {
- ({canScript, shouldScript} = await Messages.send("queryDocStatus", {url: document.URL}));
- debug(`document %s, canScript=%s, shouldScript=%s, readyState %s`, document.URL, canScript, shouldScript, document.readyState);
- if (canScript) {
- if (oldPage) {
- probe();
- return;
- }
- if (!shouldScript &&
- (document.readyState !== "complete" ||
- now() - performance.timing.domContentLoadedEventStart < 5000)) {
- // Something wrong: scripts can run, permissions say they shouldn't.
- // Was webRequest bypassed by caching/session restore/service workers?
- window.stop();
- let noCache = !!navigator.serviceWorker.controller;
- if (noCache) {
- for (let r of await navigator.serviceWorker.getRegistrations()) {
- await r.unregister();
- }
- }
- debug("Reloading %s (%s)", document.URL, noCache ? "no cache" : "cached");
- reload(noCache);
- return;
- }
- }
- init = () => {};
- } catch (e) {
- debug("Error querying docStatus", e);
- if (!oldPage &&
- /Receiving end does not exist/.test(e.message)) {
- // probably startup and bg page not ready yet, hence no CSP: reload!
- debug("Reloading", document.URL);
- reload();
- } else {
- setTimeout(() => init(oldPage), 100);
- }
- return;
- } finally {
- queryingStatus = false;
- }
-
- if (!canScript) onScriptDisabled();
+ns.on("capabilities", () => {
seen.record({
request: {
key: "noscript-probe",
@@ -223,21 +80,13 @@ async function init(oldPage = false) {
documentUrl: document.URL,
type: window === window.top ? "main_frame" : "script",
},
- allowed: canScript
- }
- );
-
- debug(`Loading NoScript in document %s, scripting=%s, readyState %s`,
- document.URL, canScript, document.readyState);
-
- if (/application|video|audio/.test(document.contentType)) {
- debug("Embedding document detected");
- embeddingDocument = true;
- window.addEventListener("pageshow", e => {
- debug("Active content still in document %s: %o", document.url, document.querySelectorAll("embed,object,video,audio"));
- }, true);
- // document.write("<plaintext>");
+ allowed: ns.canScript
+ });
+
+ if (!ns.canScript) {
+ if (document.readyState !== "loading") onScriptDisabled();
+ window.addEventListener("DOMContentLoaded", onScriptDisabled);
}
+
notifyPage();
- addEventListener("pageshow", notifyPage);
-}
+});
diff --git a/src/content/dynamicNS.js b/src/content/dynamicNS.js
new file mode 100644
index 0000000..cdd7a0e
--- /dev/null
+++ b/src/content/dynamicNS.js
@@ -0,0 +1,21 @@
+'use strict';
+
+// ensure the order which manifest scripts and dynamically registered scripts
+// are executed in doesn't matter for initialization, by using a stub.
+
+if (!this.ns) {
+ let deferredSetup = null;
+ let nsStub = this.ns = {
+ config: {},
+ setup(DEFAULT, MARKER) {
+ deferredSetup = [DEFAULT, MARKER];
+ },
+ merge: ns => {
+ ns.config = Object.assign(ns.config, nsStub.config);
+ this.ns = ns;
+ if (deferredSetup) {
+ ns.setup(...deferredSetup);
+ }
+ }
+ }
+}
diff --git a/src/content/embeddingDocument.js b/src/content/embeddingDocument.js
new file mode 100644
index 0000000..75b0db0
--- /dev/null
+++ b/src/content/embeddingDocument.js
@@ -0,0 +1,20 @@
+if (ns.embeddingDocument) {
+ ns.on("capabilities", () => {
+ for (let policyType of ["object", "media"]) {
+ if (!ns.allows(policyType)) {
+ let request = {
+ id: `noscript-${policyType}-doc`,
+ type: policyType,
+ url: document.URL,
+ documentUrl: document.URL,
+ embeddingDocument: true,
+ };
+ let ph = PlaceHolder.create(policyType, request);
+ if (ph.replacements.size > 0) {
+ debug(`Created placeholder for ${policyType} at ${document.URL}`);
+ seen.record({policyType, request, allowed: false});
+ }
+ }
+ }
+ });
+}
diff --git a/src/content/media.js b/src/content/media.js
index 910fd27..770a43f 100644
--- a/src/content/media.js
+++ b/src/content/media.js
@@ -1,5 +1,5 @@
-ns.on("perms", event => {
- debug("Media Hook", document.URL, document.documentElement && document.documentElement.innerHTML, ns.perms.CURRENT); // DEV_ONLY
+ns.on("capabilities", event => {
+ debug("Media Hook", document.URL, document.documentElement && document.documentElement.innerHTML, ns.capabilities); // DEV_ONLY
let mediaBlocker = !ns.allows("media");
let unpatched = new Map();
function patch(obj, methodName, replacement) {
diff --git a/src/content/staticNS.js b/src/content/staticNS.js
new file mode 100644
index 0000000..817351a
--- /dev/null
+++ b/src/content/staticNS.js
@@ -0,0 +1,99 @@
+'use strict';
+{
+ let listenersMap = new Map();
+ let backlog = new Set();
+
+ let ns = {
+ debug: true, // DEV_ONLY
+ get embeddingDocument() {
+ delete this.embeddingDocument;
+ return this.embeddingDocument = CSP.isEmbedType(document.contentType);
+ },
+ on(eventName, listener) {
+ let listeners = listenersMap.get(eventName);
+ if (!listeners) listenersMap.set(eventName, listeners = new Set());
+ listeners.add(listener);
+ if (backlog.has(eventName)) this.fire(eventName, listener);
+ },
+ detach(eventName, listener) {
+ let listeners = listenersMap.get(eventName);
+ if (listeners) listeners.delete(listener);
+ },
+ fire(eventName, listener = null) {
+ if (listener) {
+ listener({type:eventName, source: this});
+ return;
+ }
+ let listeners = listenersMap.get(eventName);
+ if (listeners) {
+ for (let l of listeners) {
+ this.fire(eventName, l);
+ }
+ }
+ backlog.add(eventName);
+ },
+
+ setup(DEFAULT, MARKER) {
+ this.config.DEFAULT = DEFAULT;
+ if(!this.config.CURRENT) this.config.CURRENT = DEFAULT;
+
+ // ugly hack: since now we use registerContentScript instead of the
+ // filterRequest dynamic script injection hack, we use top.name
+ // to store per-tab information. We don't want web content to
+ // mess with it, though, so we wrap it around auto-hiding accessors
+ this.config.MARKER = MARKER;
+ let eraseTabInfoRx = new RegExp(`[^]*${MARKER},?`);
+ if (eraseTabInfoRx.test(top.name)) {
+ let _name = top.name;
+ let tabInfoRx = new RegExp(`^${MARKER}\\[([^]*?)\\]${MARKER},`);
+ if (top === window) { // wrap to hide
+ Reflect.defineProperty(top.wrappedJSObject, "name", {
+ get: exportFunction(() => top.name.replace(eraseTabInfoRx, ""), top.wrappedJSObject),
+ set: exportFunction(value => {
+ let preamble = top.name.match(tabInfoRx);
+ top.name = `${preamble && preamble[0] || ""}${value}`;
+ return value;
+ }, top.wrappedJSObject)
+ });
+ }
+ let tabInfoMatch = _name.match(tabInfoRx);
+ if (tabInfoMatch) try {
+ this.config.tabInfo = JSON.parse(tabInfoMatch[1]);
+ } catch (e) {
+ error(e);
+ }
+ }
+
+ if (!this.config.DEFAULT || this.config.tabInfo.unrestricted) {
+ this.allows = () => true;
+ this.capabilities = Object.assign(
+ new Set(["script"]), { has() { return true; } });
+ } else {
+ let perms = this.config.CURRENT;
+ this.capabilities = new Set(perms.capabilities);
+ new DocumentCSP(document).apply(this.capabilities, this.embeddingDocument);
+ }
+
+ this.canScript = this.allows("script");
+ this.fire("capabilities");
+ },
+ config: { DEFAULT: null, CURRENT: null, tabInfo: {}, MARKER: "" },
+
+ allows(cap) {
+ return this.capabilities && this.capabilities.has(cap);
+ },
+
+ getWindowName() {
+ let marker = this.config.MARKER;
+ return (top === window && marker) ?
+ window.name.split(`${marker},`).pop()
+ : window.name;
+ }
+ };
+
+ if (this.ns) {
+ this.ns.merge(ns);
+ } else {
+ this.ns = ns;
+ }
+}
diff --git a/src/content/webglHook.js b/src/content/webglHook.js
index efafcd5..4475585 100644
--- a/src/content/webglHook.js
+++ b/src/content/webglHook.js
@@ -1,5 +1,5 @@
-ns.on("perms", event => {
- debug("WebGL Hook", document.URL, document.documentElement && document.documentElement.innerHTML, ns.perms.CURRENT); // DEV_ONLY
+ns.on("capabilities", event => {
+ debug("WebGL Hook", document.URL, document.documentElement && document.documentElement.innerHTML, ns.capabilities); // DEV_ONLY
if (ns.allows("webgl")) return;
let proto = HTMLCanvasElement.prototype;
let getContext = proto.getContext;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 18:15:30 +0000