[FEATURE] usage of JWKS with JWT (w/o OpenID connect)

Signed-off-by: Sebastian Michalski <shekerama@gmail.com>

Author: sebastianmichalski

src/test/java/com/amazon/dlic/auth/http/jwt/keybyoidc/HTTPJwtKeyByOpenIdConnectAuthenticatorTest.java

@@ -84,6 +84,26 @@ public void jwksUriTest() {
 		Assert.assertEquals(requiredIssuer, jwtAuth.getRequiredIssuer());
 	}
 
+	@Test
+	public void jwksMissingRequiredAudienceAndIssuerTest() {
+		Settings settings = Settings.builder()
+			.put("jwks_uri", mockIdpServer.getJwksUri())
+			.build();
+
+		HTTPJwtKeyByOpenIdConnectAuthenticator jwtAuth = new HTTPJwtKeyByOpenIdConnectAuthenticator(settings, null);
+
+		AuthCredentials creds = jwtAuth.extractCredentials(new FakeRestRequest(
+			ImmutableMap.of("Authorization", TestJwts.MC_COY_SIGNED_OCT_1), new HashMap<>()), null);
+
+		Assert.assertNotNull(creds);
+		Assert.assertEquals(TestJwts.MCCOY_SUBJECT, creds.getUsername());
+		Assert.assertEquals(TestJwts.TEST_AUDIENCE, creds.getAttributes().get("attr.jwt.aud"));
+		Assert.assertEquals(0, creds.getBackendRoles().size());
+		Assert.assertEquals(3, creds.getAttributes().size());
+		Assert.assertNull(jwtAuth.getRequiredAudience());
+		Assert.assertNull(jwtAuth.getRequiredIssuer());
+	}
+
 	@Test
 	public void jwksUriMissingTest() {
 		var exception = Assert.assertThrows(Exception.class, () -> {