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Code Issues Releases Wiki Activity

Use random trusted-types policy name

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Related commit:
4f0d1301ab
This commit is contained in:
Raymond Hill 2024-08-04 00:15:40 -04:00
parent fea92ac110
commit 3668445679
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GPG Key ID: 25E1490B761470C2
1 changed files with 18 additions and 6 deletions
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24
assets/resources/scriptlets.js
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@ -203,17 +203,28 @@ function safeSelf() {
/******************************************************************************/
builtinScriptlets.push({
name: 'get-exception-token.fn',
fn: getExceptionToken,
name: 'get-random-token.fn',
fn: getRandomToken,
dependencies: [
'safe-self.fn',
],
});
function getExceptionToken() {
function getRandomToken() {
const safe = safeSelf();
const token =
safe.String_fromCharCode(Date.now() % 26 + 97) +
return safe.String_fromCharCode(Date.now() % 26 + 97) +
safe.Math_floor(safe.Math_random() * 982451653 + 982451653).toString(36);
}
/******************************************************************************/
builtinScriptlets.push({
name: 'get-exception-token.fn',
fn: getExceptionToken,
dependencies: [
'get-random-token.fn',
],
});
function getExceptionToken() {
const token = getRandomToken();
const oe = self.onerror;
self.onerror = function(msg, ...args) {
if ( typeof msg === 'string' && msg.includes(token) ) { return true; }
@ -701,6 +712,7 @@ builtinScriptlets.push({
name: 'replace-node-text.fn',
fn: replaceNodeTextFn,
dependencies: [
'get-random-token.fn',
'run-at.fn',
'safe-self.fn',
],
@ -736,7 +748,7 @@ function replaceNodeTextFn(
if ( tt instanceof Object ) {
if ( typeof tt.getPropertyType === 'function' ) {
if ( tt.getPropertyType('script', 'textContent') === 'TrustedScript' ) {
return tt.createPolicy('uBO', out);
return tt.createPolicy(getRandomToken(), out);
}
}
}