From 3c3edacd7cabff50cde220311bb6e309b7558d4e Mon Sep 17 00:00:00 2001
From: Jonathan Bernard <jonathan@jdbernard.com>
Date: Fri, 10 Jan 2025 21:01:19 -0600
Subject: [PATCH] Support cases where the aud token is a list of valid
 audiences.

---
 buffoonery.nimble       |  2 +-
 src/buffoonery/auth.nim | 11 +++++++++--
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/buffoonery.nimble b/buffoonery.nimble
index 5be52b6..6b075b8 100644
--- a/buffoonery.nimble
+++ b/buffoonery.nimble
@@ -1,6 +1,6 @@
 # Package
 
-version       = "0.4.2"
+version       = "0.4.3"
 author        = "Jonathan Bernard"
 description   = "Jonathan's opinionated extensions and auth layer for Jester."
 license       = "MIT"
diff --git a/src/buffoonery/auth.nim b/src/buffoonery/auth.nim
index fd6f769..ab6eb3d 100644
--- a/src/buffoonery/auth.nim
+++ b/src/buffoonery/auth.nim
@@ -143,8 +143,15 @@ proc validateJWT*(ctx: ApiAuthContext, jwt: JWT) =
     if jwt.claims.sub.isNone: failAuth "Missing 'sub' claim."
     if jwt.claims.exp.isNone: failAuth "Missing or invalid 'exp' claim."
 
-    if not ctx.validAudiences.contains(jwt.claims.aud.get):
-      failAuth "JWT is not for us (invalid audience)."
+    if jwt.claims["aud"].get.kind == JString:
+      # If the token is for a single audience, check that it is for us.
+      if not ctx.validAudiences.contains(jwt.claims.aud.get):
+        failAuth "JWT is not for us (invalid audience)."
+    elif jwt.claims["aud"].get.kind == JArray:
+      # If the token is for multiple audiences, check that at least one is for us.
+      let auds = jwt.claims["aud"].get.getElems
+      if not auds.anyIt(ctx.validAudiences.contains(it.getStr)):
+        failAuth "JWT is not for us (invalid audience)."
 
     let signingAlgorithm = jwt.header.alg.get