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Handle when aud OIDC claim is an Array (#4584)

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* Handle when `aud` OIDC claim is an Array

The `aud` claim of OIDC id_tokens [can be an array](ce6d694639/src/Claims.ts (L92)) but the existing logic
incorrectly assumes `aud` is always a string.

This PR adds the necessary check.

* Clarify `aud` OIDC claim check

* Fix for prettier

---------

Co-authored-by: David Baker <dbkr@users.noreply.github.com>
This commit is contained in:
Liam Diprose
2024-12-17 00:38:34 +13:00
committed by GitHub
parent 315e81b7de
commit 693bb22ba1
2 changed files with 19 additions and 1 deletions
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3
src/oidc/validate.ts
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@@ -179,7 +179,8 @@ export const validateIdToken = (
* The ID Token MUST be rejected if the ID Token does not list the Client as a valid audience, or if it contains additional audiences not trusted by the Client.
* EW: Don't accept tokens with other untrusted audiences
* */
if (claims.aud !== clientId) {
const sanitisedAuds = typeof claims.aud === "string" ? [claims.aud] : claims.aud;
if (!sanitisedAuds.includes(clientId)) {
throw new Error("Invalid audience");
}