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Protocol sanity check #16

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Jul 12, 2022
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6 changes: 3 additions & 3 deletions jest.config.ts
Original file line number Diff line number Diff line change
@@ -43,9 +43,9 @@ const config: Config.InitialOptions = {
coverageThreshold: {
global: {
branches: 20,
functions: 50,
lines: 66,
statements: 66,
functions: 40,
lines: 62,
statements: 62,
},
},

4 changes: 4 additions & 0 deletions src/index.test.ts
Original file line number Diff line number Diff line change
@@ -103,6 +103,10 @@ describe('Phishing warning page', () => {
'should redirect to the site after the user continues at their own risk',
);

it.todo(
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'should not redirect to the site after the user continues at their own risk and the href is an invalid protocol',
);

it('should throw an error if the hostname is missing', async () => {
mockLocation(getUrl(undefined, 'https://example.com'));

19 changes: 19 additions & 0 deletions src/index.ts
Original file line number Diff line number Diff line change
@@ -76,6 +76,20 @@ function setupOpenSelfInNewTabLink() {
newTabLink.setAttribute('href', window.location.href);
}

/**
* Checks to see if the suspectHref is a valid format to forward on
* Specifically checks the protocol of the passed href.
*
* @param href - The href value to check.
* @returns Boolean on if its valid to attack to a href prop.
*/
function isValidSuspectHref(href: string) {
const allowedProtocols = ['http:', 'https:'];
const parsedSuspectHref = new URL(href);

return allowedProtocols.indexOf(parsedSuspectHref.protocol) !== -1;
}

/**
* Initialize the phishing warning page streams.
*/
@@ -121,6 +135,11 @@ function start() {
}

continueLink.addEventListener('click', async () => {
if (isValidSuspectHref(suspectHref) === false) {
console.log(`Disallowed Protocol, cannot continue.`);
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return;
}

phishingSafelistStream.write({
jsonrpc: '2.0',
method: 'safelistPhishingDomain',