security-and-privacy/CanvasBlocker
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Always specify correct function names

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kkapsner 2020-01-22 13:38:24 +01:00
parent 29e61ada25
commit e2efb727b9
3 changed files with 52 additions and 35 deletions
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60
lib/intercept.js
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@ -143,40 +143,44 @@
}
map.set(object, originalPropertyDescriptor);
const temp = class {
[`get ${name}`](){
if (forceLoad){
logging.warning("force load the settings. Calling stack:", (new Error()).stack);
undoPreIntercept();
settings.forceLoad();
doRealIntercept(windowToProcess, apis, state);
const descriptor = Object.getOwnPropertyDescriptor(object, name);
return descriptor.value || descriptor.get.call(this);
}
else {
logging.notice("API blocked (%s)", name);
const url = getURL(windowToProcess);
if (!url){
return undef;
}
const error = new Error();
apis.notify({
url,
errorStack: error.stack,
messageId: "preBlock",
timestamp: new Date(),
functionName: name,
dataURL: false
});
return undef;
}
}
[`set ${name}`](newValue){}
}.prototype;
Object.defineProperty(
object,
name,
{
enumerable: true,
configurable: true,
get: extension.exportFunctionWithName(function(){
if (forceLoad){
logging.warning("force load the settings. Calling stack:", (new Error()).stack);
undoPreIntercept();
settings.forceLoad();
doRealIntercept(windowToProcess, apis, state);
const descriptor = Object.getOwnPropertyDescriptor(object, name);
return descriptor.value || descriptor.get.call(this);
}
else {
logging.notice("API blocked (%s)", name);
const url = getURL(windowToProcess);
if (!url){
return undef;
}
const error = new Error();
apis.notify({
url,
errorStack: error.stack,
messageId: "preBlock",
timestamp: new Date(),
functionName: name,
dataURL: false
});
return undef;
}
}, windowToProcess, `get ${name}`),
set: extension.exportFunctionWithName(function(){}, windowToProcess, `set ${name}`)
get: extension.exportFunctionWithName(temp[`get ${name}`], windowToProcess, `get ${name}`),
set: extension.exportFunctionWithName(temp[`set ${name}`], windowToProcess, `set ${name}`)
}
);
});