OF-2534: Support inline XEP-0198 <enable/> in SASL2 Bind2 requests - #3480
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guusdk merged 4 commits intoSep 3, 2026
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📝 WalkthroughWalkthroughThe change adds SASL2 Bind2 inline support for XEP-0198 stream management. It builds Suggested reviewers: Merge Risk: 🟡 Moderate · up to The change exposes an inline feature intended to remain hidden and can enable stream resumption for malformed client input. These protocol issues should be corrected before merge. 🚥 Pre-merge checks | ✅ 3✅ Passed checks (3 passed)
Full details: Description checkExplanation The pull request description directly describes the XEP-0198 Bind2 implementation, inline stream-management handling, failure responses, and the explicitly excluded stream-resumption work. It matches the changeset. Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out. Comment |
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Inline comments:
In
`@xmppserver/src/main/java/org/jivesoftware/openfire/handler/Bind2StreamManagementHandler.java`:
- Line 76: Update the resume parsing expression in Bind2StreamManagementHandler
to accept only exact "true" or "1" values; remove case-insensitive matching and
the "yes" alternative so every other value, including "TRUE" and "yes", remains
false.
In
`@xmppserver/src/main/java/org/jivesoftware/openfire/net/SASLAuthentication.java`:
- Line 825: Update the Bind2 flow in SASLAuthentication so
clientSession.setAuthToken is performed only after bindResource returns BOUND,
passing clientAuthToken directly to bindResource beforehand. Preserve failure
handling for CONFLICT and exceptional results without leaving an authentication
token set, and add assertNull(session.getAuthToken()) to both failed-bind tests.
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📒 Files selected for processing (11)
xmppserver/src/main/java/org/jivesoftware/openfire/SessionManager.javaxmppserver/src/main/java/org/jivesoftware/openfire/handler/Bind2StreamManagementHandler.javaxmppserver/src/main/java/org/jivesoftware/openfire/net/Bind2InlineHandler.javaxmppserver/src/main/java/org/jivesoftware/openfire/net/Bind2Request.javaxmppserver/src/main/java/org/jivesoftware/openfire/net/SASLAuthentication.javaxmppserver/src/main/java/org/jivesoftware/openfire/streammanagement/StreamManagementException.javaxmppserver/src/main/java/org/jivesoftware/openfire/streammanagement/StreamManager.javaxmppserver/src/test/java/org/jivesoftware/openfire/handler/Bind2StreamManagementAvailabilityTest.javaxmppserver/src/test/java/org/jivesoftware/openfire/handler/Bind2StreamManagementHandlerTest.javaxmppserver/src/test/java/org/jivesoftware/openfire/net/Bind2RequestProcessingTest.javaxmppserver/src/test/java/org/jivesoftware/openfire/net/SASLAuthenticationTest.java
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Fishbowler
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Sep 2, 2026
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Not even close to a full review...
Implements XEP-0198 § 9.1: a client may now include `<enable/>` in the Bind2 `<bind/>` element of a SASL2 `<authenticate/>`. Bind2StreamManagementHandler registers as a Bind2 inline handler, advertising 'urn:xmpp:sm:3' whenever stream management is active. StreamManager gains enableAndBuildElement, which returns the <enabled/> element instead of sending it, so that an inline caller can embed it. Failures are reported by throwing StreamManagementException carrying the error condition, which the handler turns into the `<failed/>` element inside `<bound/>` that § 9.1.1 requires. The standalone <enable/> path builds the same element and delivers it as before. Enabling stream management requires an authenticated session, so this relies on setStatus(AUTHENTICATED) running ahead of processFeatureRequests, as of the preceding Bind2 change. Inline stream _resumption_ (§ 9.2) is not part of this change; the `<sm/>` element is deliberately not yet advertised in the SASL2 `<inline/>` element. Co-authored-by: dwd <dwd@dave.cridland.net>
LocalClientSession#getAvailableStreamFeatures dereferenced a possibly null connection, unlike every other accessor in LocalSession.
…iation A SASL2 negotiation that failed after the SASL exchange itself succeeded left the session partly authenticated. Three related defects are addressed in this commit: * A failed inline Bind2 left the auth token set. The session then advertised resource binding and stream management instead of SASL on the next stream header, and a retry as a different user inherited the previous attempt's identity. * An exception after the bind completed sent <failure/> for a session that was already AUTHENTICATED and registered in the routing table. Such a failure now closes the stream with an error; one occurring before <success/> reaches the peer undoes the bind. * Anonymous SASL2+Bind2 could never succeed: SessionManager#bindResource dereferences the token's username, which is null for an anonymous token. Anonymous sessions now go through setAnonymousAuth(), as that method's contract already required.
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Inline comments:
In `@xmppserver/src/main/java/org/jivesoftware/openfire/SessionManager.java`:
- Line 1909: Update the handler registration in SessionManager.start() so
Bind2Request.featureElement() does not advertise stream management through SASL2
inline features while request processing still reaches
Bind2StreamManagementHandler. Preserve the registry entry required for handling
requests, and adjust the feature-advertisement filtering or registration
metadata rather than removing Bind2StreamManagementHandler registration.
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📒 Files selected for processing (7)
xmppserver/src/main/java/org/jivesoftware/openfire/SessionManager.javaxmppserver/src/main/java/org/jivesoftware/openfire/handler/Bind2StreamManagementHandler.javaxmppserver/src/main/java/org/jivesoftware/openfire/net/SASLAuthentication.javaxmppserver/src/main/java/org/jivesoftware/openfire/session/LocalClientSession.javaxmppserver/src/test/java/org/jivesoftware/openfire/handler/Bind2StreamManagementAvailabilityTest.javaxmppserver/src/test/java/org/jivesoftware/openfire/handler/Bind2StreamManagementHandlerTest.javaxmppserver/src/test/java/org/jivesoftware/openfire/net/SASLAuthenticationTest.java
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🟡 Changes recommended
Inline SM resumption is currently parsed too permissively (accepting non-xs:boolean values), which can produce protocol-inconsistent resumable streams.
Once you've addressed the issues Copilot identified, you can request another Copilot review.
Pull request overview
This PR extends the SASL2 + Bind2 authentication flow to support inline XEP-0198 Stream Management enablement (XEP-0198 §9.1) by allowing a client to include <enable/> in the Bind2 <bind/> element and embedding the resulting <enabled/> or <failed/> response inside the SASL2 <success/> payload.
Changes:
- Added
Bind2StreamManagementHandlerand registration/unregistration inSessionManagerto process inline SM<enable/>requests and advertiseurn:xmpp:sm:3when SM is active. - Refactored
StreamManagerto provideenableAndBuildElement(...), enabling inline embedding of<enabled/>, and introducedStreamManagementExceptionfor condition-carrying failures. - Hardened SASL2 Bind2 flow in
SASLAuthenticationand expanded unit tests to validate binding unwind/abort behavior and token usage.
File summaries
| File | Description |
|---|---|
| xmppserver/src/test/java/org/jivesoftware/openfire/net/SASLAuthenticationTest.java | Adds stronger SASL2+Bind2 correctness tests (token identity, unwind-on-failure, anonymous binding behavior). |
| xmppserver/src/test/java/org/jivesoftware/openfire/handler/Bind2StreamManagementHandlerTest.java | New unit tests for inline SM enable handling and failure embedding in <bound/>. |
| xmppserver/src/test/java/org/jivesoftware/openfire/handler/Bind2StreamManagementAvailabilityTest.java | Verifies that SM inline feature advertisement follows the dynamic StreamManager activation setting. |
| xmppserver/src/main/java/org/jivesoftware/openfire/streammanagement/StreamManager.java | Introduces enableAndBuildElement and shared <failed/> element construction for inline + standalone enable paths. |
| xmppserver/src/main/java/org/jivesoftware/openfire/streammanagement/StreamManagementException.java | New exception type to carry XEP-0198 failure condition for inline embedding. |
| xmppserver/src/main/java/org/jivesoftware/openfire/SessionManager.java | Registers/unregisters the new inline handler during module lifecycle; synchronizes start/stop. |
| xmppserver/src/main/java/org/jivesoftware/openfire/session/LocalClientSession.java | Avoids NPEs when advertising stream features on detached/closed sessions by handling null connections. |
| xmppserver/src/main/java/org/jivesoftware/openfire/net/SASLAuthentication.java | Adjusts SASL2 Bind2 completion/abort semantics, adds bind unwind on pre-success failures, and closes stream on post-success failures. |
| xmppserver/src/main/java/org/jivesoftware/openfire/handler/Bind2StreamManagementHandler.java | New inline handler to process <enable/> inside Bind2 and embed <enabled/>/<failed/> inside <bound/>. |
Review details
- Files reviewed: 9/9 changed files
- Comments generated: 1
- Review effort level: Lite
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dwd
approved these changes
Sep 3, 2026
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I've split this off from #3417 while I was trying to rebase that on the latest version of HEAD (which includes considerable refactoring).
Implements XEP-0198 § 9.1: a client may now include
<enable/>in the Bind2<bind/>element of a SASL2<authenticate/>.Bind2StreamManagementHandler registers as a Bind2 inline handler, advertising 'urn:xmpp:sm:3' whenever stream management is active.
StreamManager gains enableAndBuildElement, which returns the element instead of sending it, so that an inline caller can embed it.
Failures are reported by throwing StreamManagementException carrying the error condition, which the handler turns into the
<failed/>element inside<bound/>that § 9.1.1 requires. The standalone path builds the same element and delivers it as before.Enabling stream management requires an authenticated session, so this relies on setStatus(AUTHENTICATED) running ahead of processFeatureRequests, as of the preceding Bind2 change.
Inline stream resumption (§ 9.2) is not part of this change; the
<sm/>element is deliberately not yet advertised in the SASL2<inline/>element.Co-authored-by: dwd dwd@dave.cridland.net