security-and-privacy/CanvasBlocker
security-and-privacy/CanvasBlocker
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Limit periodical rnd clearing

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Periodical persistent rnd clearing does not clear in active tabs.

Fixes #518
This commit is contained in:
kkapsner 2021-02-21 11:49:29 +01:00
parent 28dd7f6819
commit ee87773ce2
5 changed files with 24 additions and 9 deletions
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23
lib/randomSupplies.js
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@ -82,6 +82,12 @@
let persistentRnd = Object.create(null);
let cookieStoreId = false;
function getCookieStoreId(){
while (cookieStoreId === false){
extension.waitSync("to wait for cookie store id");
}
return cookieStoreId;
}
settings.onloaded(function(){
try {
let storedData = JSON.parse(
@ -116,15 +122,24 @@
}
}
if (data["canvasBlocker-clear-domain-rnd"]){
const domain = getCookieStoreId() + getDomain(window);
let ownPersistendRnd = data["canvasBlocker-clear-domain-rnd"] !== "force"? persistentRnd[domain]: false;
persistentRnd = Object.create(null);
if (ownPersistendRnd){
persistentRnd[domain] = ownPersistendRnd;
extension.message.send({
"canvasBlocker-new-domain-rnd": {
domain,
incognito: extension.inIncognitoContext,
rnd: Array.from(persistentRnd[domain])
}
});
}
}
});
return function getPersistentRnd(window){
while (cookieStoreId === false){
extension.waitSync("to wait for cookie store id");
}
const domain = cookieStoreId + getDomain(window);
const domain = getCookieStoreId() + getDomain(window);
if (!persistentRnd[domain]){
// create the (sub-)domains random numbers if not existing
persistentRnd[domain] = new Uint8Array(128);