smolnar82 commented on code in PR #1405:
URL: https://github.com/apache/knox/pull/1405#discussion_r4034186229
##########
gateway-provider-security-jwt/src/test/java/org/apache/knox/gateway/provider/federation/jwt/filter/TokenExchangeHandlerTest.java:
##########
@@ -571,6 +560,74 @@ public void
testNoResourceOrAudienceLeavesRequestAttributeUnset() throws Excepti
assertFalse(requestedAudiencesAttr.hasCaptured());
}
+ @Test
+ public void testSameSubjectRequestedAudienceIgnoredWhenFlagDisabled() throws
Exception {
+ // Fail-safe default: for a same-subject exchange the requested audience
is dropped entirely
+ // (not conveyed downstream), so a passthrough audience validator cannot
mint an
+ // arbitrarily-audienced token without authorization. The exchange still
succeeds.
+ filter.valid.put("subtok", jwtWithAudiences("alice", "KNOXSSO",
"service-a"));
+ handler.handle(exchangeRequest("subtok", null, new String[]
{"service-a"}), response, chain);
+
+ assertTrue(filter.continued);
+ assertFalse(requestedAudiencesAttr.hasCaptured());
+ }
+
+ @Test
+ public void
testSameSubjectRequestedAudienceAuthorizedWhenSubsetOfSubjectTokenAudience()
throws Exception {
+ // Honoring on: a requested audience the subject token already carries is
authorized and
+ // conveyed, even when the subject token carries additional audiences.
+ filter.delegationSameSubjectRequestedAudienceEnabled = true;
+ filter.valid.put("subtok", jwtWithAudiences("alice", "KNOXSSO",
"service-a", "service-b", "service-c"));
+ handler.handle(exchangeRequest("subtok", null, new String[]
{"service-a"}), response, chain);
+
+ assertTrue(filter.continued);
+ assertEquals(Arrays.asList("service-a"),
requestedAudiencesAttr.getValue());
+ }
+
+ @Test
+ public void
testSameSubjectRequestedAudienceRejectedWhenNotInSubjectTokenAudience() throws
Exception {
+ // Honoring on but the requested audience is not among the subject token's
own aud claim:
+ // rejected as invalid_target and never conveyed.
+ filter.delegationSameSubjectRequestedAudienceEnabled = true;
+ filter.valid.put("subtok", jwtWithAudiences("alice", "KNOXSSO",
"service-a"));
+ handler.handle(exchangeRequest("subtok", null, new String[]
{"service-b"}), response, chain);
+
+ assertFalse(filter.continued);
+ assertEquals(HttpServletResponse.SC_BAD_REQUEST, filter.errorStatus);
+ assertEquals("invalid_target", filter.error);
+ assertFalse(requestedAudiencesAttr.hasCaptured());
+ }
+
+ @Test
+ public void
testSameSubjectRequestedAudienceRejectedWhenSubjectTokenHasNoAudience() throws
Exception {
+ // Honoring on and a requested audience present, but the subject token
carries no aud claim:
+ // there is nothing to authorize against, so the request is rejected.
+ filter.delegationSameSubjectRequestedAudienceEnabled = true;
+ filter.valid.put("subtok", jwt("alice", "KNOXSSO"));
+ handler.handle(exchangeRequest("subtok", null, new String[]
{"service-a"}), response, chain);
+
+ assertFalse(filter.continued);
+ assertEquals(HttpServletResponse.SC_BAD_REQUEST, filter.errorStatus);
+ assertEquals("invalid_target", filter.error);
+ assertFalse(requestedAudiencesAttr.hasCaptured());
+ }
Review Comment:
Will add a boundary test where some requested audiences are in the subject
token's `aud` and some aren't, asserting it's rejected, which confirms all
values are checked, not just one.
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