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script-nonces-hidden-meta.sub.html
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script-nonces-hidden-meta.sub.html
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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<meta http-equiv="content-security-policy" content="script-src 'nonce-abc'; img-src 'none'">
<body>
<!-- Basics -->
<script nonce="abc" id="testScript">
document.currentScript.setAttribute('executed', 'yay');
</script>
<script nonce="abc">
var script = document.querySelector('#testScript');
test(t => {
// Query Selector
assert_equals(document.querySelector('body [nonce]'), script);
assert_equals(document.querySelector('body [nonce=""]'), null);
assert_equals(document.querySelector('body [nonce=abc]'), script);
assert_equals(script.getAttribute('nonce'), 'abc');
assert_equals(script.nonce, 'abc');
}, "Reading 'nonce' content attribute and IDL attribute.");
// Clone node.
test(t => {
script.setAttribute('executed', 'boo');
var s2 = script.cloneNode();
assert_equals(s2.nonce, 'abc', 'IDL attribute');
assert_equals(s2.getAttribute('nonce'), 'abc');
}, "Cloned node retains nonce.");
async_test(t => {
var s2 = script.cloneNode();
document.head.appendChild(s2);
assert_equals(s2.nonce, 'abc');
assert_equals(s2.getAttribute('nonce'), 'abc');
window.addEventListener('load', t.step_func_done(_ => {
// The cloned script won't execute, as its 'already started' flag is set.
assert_equals(s2.getAttribute('executed'), 'boo');
}));
}, "Cloned node retains nonce when inserted.");
// Set the content attribute to 'foo'
test(t => {
script.setAttribute('nonce', 'foo');
assert_equals(script.getAttribute('nonce'), 'foo');
assert_equals(script.nonce, 'foo');
}, "Writing 'nonce' content attribute.");
// Set the IDL attribute to 'bar'
test(t => {
script.nonce = 'bar';
assert_equals(script.nonce, 'bar');
assert_equals(script.getAttribute('nonce'), 'foo');
}, "Writing 'nonce' IDL attribute.");
// Fragment parser.
var documentWriteTest = async_test("Document-written script executes.");
document.write(`<script nonce='abc'>
documentWriteTest.done();
test(t => {
var script = document.currentScript;
assert_equals(script.getAttribute('nonce'), 'abc');
assert_equals(script.nonce, 'abc');
}, "Document-written script's nonce value.");
</scr` + `ipt>`);
// Create node.
async_test(t => {
var s = document.createElement('script');
s.innerText = script.innerText;
s.nonce = 'abc';
assert_equals(s.nonce, 'abc');
assert_equals(s.getAttribute('nonce'), null);
document.head.appendChild(s);
assert_equals(s.nonce, 'abc');
assert_equals(s.getAttribute('nonce'), null);
window.addEventListener('load', t.step_func_done(_ => {
assert_equals(s.getAttribute('executed'), 'yay');
}));
}, "createElement.nonce.");
async_test(t => {
var s = document.createElement('script');
s.innerText = script.innerText;
s.nonce = 'zyx';
s.setAttribute('nonce', 'abc');
assert_equals(s.nonce, 'abc');
document.head.appendChild(s);
assert_equals(s.nonce, 'abc');
assert_equals(s.getAttribute('nonce'), 'abc');
window.addEventListener('load', t.step_func_done(_ => {
assert_equals(s.getAttribute('executed'), 'yay');
}));
}, "setAttribute('nonce') overwrites '.nonce' upon insertion.");
// Create node.
async_test(t => {
var s = document.createElement('script');
s.innerText = script.innerText;
s.setAttribute('nonce', 'abc');
assert_equals(s.getAttribute('nonce'), 'abc', "Pre-insertion content");
assert_equals(s.nonce, 'abc', "Pre-insertion IDL");
document.head.appendChild(s);
assert_equals(s.nonce, 'abc', "Post-insertion IDL");
assert_equals(s.getAttribute('nonce'), 'abc', "Post-insertion content");
window.addEventListener('load', t.step_func_done(_ => {
assert_equals(s.getAttribute('executed'), 'yay');
}));
}, "createElement.setAttribute.");
</script>
<!-- CSS Leakage -->
<style>
#cssTest { display: block; }
#cssTest[nonce=abc] { background: url(/security/resources/abe.png); }
</style>
<script nonce="abc" id="cssTest">
test(t => {
const script = document.querySelector('#cssTest');
t.add_cleanup(() => script.remove());
var style = getComputedStyle(script);
assert_equals(style['display'], 'block');
assert_equals(style['background-image'], "url(\"http://{{domains[]}}:{{ports[http][0]}}/security/resources/abe.png\")");
}, "Nonces leak via CSS side-channels.");
</script>