OF-3361 OF-3362: Handle bad clients during SASL2 authentication - #3496
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📝 WalkthroughWalkthroughThe change adds SASL2 task negotiation support and tracks Bind2 state separately from synchronous SASL2 completion. Suggested reviewers: Priority: ➖ Normal Merge Risk: 🟡 Moderate · up to Clients using SASL2 task negotiation are disconnected during valid authentication, so this should be fixed before merge. 🚥 Pre-merge checks | ✅ 3✅ Passed checks (3 passed)
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Inline comments:
In `@xmppserver/src/main/java/org/jivesoftware/openfire/net/StanzaHandler.java`:
- Line 314: Update both authenticatedAwaitingFeatures branches to keep Bind2
pending separate from sasl2AuthenticationCompleted while asynchronous Bind2
processing runs. Set sasl2AuthenticationCompleted only after Bind2 success is
delivered, and clear the pending state in abortSasl2 on failure so retries do
not trigger the already-completed guard.
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xmppserver/src/main/java/org/jivesoftware/openfire/net/StanzaHandler.javaxmppserver/src/test/java/org/jivesoftware/openfire/net/StanzaHandlerTest.java
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Fishbowler
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Actionable comments posted: 3
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Inline comments:
In `@xmppserver/src/main/java/org/jivesoftware/openfire/net/StanzaHandler.java`:
- Line 339: Move ownership of the SASL2 Bind2 pending/succeeded marker into
SASLAuthentication: set SASLAuthentication.SASL2_BIND2_PENDING_OR_SUCCEEDED
immediately when Bind2 is accepted, before synchronous anonymous completion or
SessionManager.bindResource dispatch. Preserve clearing through abortSasl2, and
remove both post-handle marker writes in StanzaHandler.
In
`@xmppserver/src/main/java/org/jivesoftware/openfire/nio/NettyXMPPDecoder.java`:
- Around line 94-97: Update NettyXMPPDecoder so pollNonStanzaDataReceived
notifications are deferred until queued stanzas from the same decode call have
been processed, allowing the SASL2 authenticate stanza to update startedSASL
before nonStanzaDataReceived() runs. Preserve normal stanza handling and add a
regression test covering authenticate followed by top-level data in one decode
sequence.
In
`@xmppserver/src/test/java/org/jivesoftware/openfire/net/StanzaHandlerTest.java`:
- Line 474: Update the responseStanza construction in StanzaHandlerTest to use
SASL2_NAMESPACE instead of SASLAuthentication.SASL_NAMESPACE, so
SASLAuthentication.handle(..., true) reaches bindResource and the test exercises
asynchronous Bind2 cleanup.
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📒 Files selected for processing (7)
xmppserver/src/main/java/org/jivesoftware/openfire/net/SASLAuthentication.javaxmppserver/src/main/java/org/jivesoftware/openfire/net/StanzaHandler.javaxmppserver/src/main/java/org/jivesoftware/openfire/nio/NettyXMPPDecoder.javaxmppserver/src/main/java/org/jivesoftware/openfire/nio/XMLLightweightParser.javaxmppserver/src/test/java/org/jivesoftware/openfire/net/StanzaHandlerTest.javaxmppserver/src/test/java/org/jivesoftware/openfire/nio/NettyXMPPDecoderTest.javaxmppserver/src/test/java/org/jivesoftware/openfire/nio/XMLLightweightParserTest.java
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This feels like it's growing large. Especially the edits to the parser / classes that we generally never, ever touch, make me uncomfortable, being part of a largeish PR. Can we separate out fixes in distinct PRs? |
Fishbowler
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I've dropped OF-3370 out of this PR. That fix was not like the others. I'll PR that separately. |
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Inline comments:
In
`@xmppserver/src/test/java/org/jivesoftware/openfire/net/StanzaHandlerTest.java`:
- Line 421: Add the missing static import for Mockito’s never() before its
usages in StanzaHandlerTest, including the assertions around
connection.close(any(StreamError.class)), so the test class compiles.
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I have rebased this, and added a small refactoring (name change and documentation update) to remove any ambiguity between a constant that was introduced in parallel on Main, and one introduced by this PR. |
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Inline comments:
In `@xmppserver/src/main/java/org/jivesoftware/openfire/net/StanzaHandler.java`:
- Line 259: Update the startedSASL/usingSASL2 guard in StanzaHandler to allow
next and task-data only when authenticated task negotiation is active, while
continuing to reject them during the SASL mechanism exchange; preserve the
existing response and abort handling and let the valid task elements reach the
downstream dispatch.
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xmppserver/src/main/java/org/jivesoftware/openfire/net/SASLAuthentication.javaxmppserver/src/main/java/org/jivesoftware/openfire/net/StanzaHandler.javaxmppserver/src/test/java/org/jivesoftware/openfire/net/StanzaHandlerTest.java
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…solves StanzaHandler marked a SASL2 negotiation as durably completed as soon as Bind2 resource binding was dispatched, before SessionManager#bindResource's async outcome was known. If that bind later failed, the peer was correctly sent <failure/> and permitted to retry per XEP-0388 - but the retry's <authenticate/> was then wrongly disconnected as a repeat of an already-completed negotiation. Track the pending/succeeded state via session data instead, so a failed bind clears it and a legitimate retry is no longer rejected.
Rebasing this on top of another commit introduced some ambiguity. I've addressed that by renaming the constant and updating the documentation. I've decided against merging the two constants: They track different things over different (and only partially overlapping) time windows: - one is a stream-level gate that's true while a Bind2 bind is still in flight (before its outcome is known) and gets cleared on failure, - while the other is a durable, success-only record of whether Bind2 specifically was the binding mechanism used. Merging them would make code checking "was Bind2 used" see a false positive during the pending async window.
2 participants
Whilst adding tests to SINT Server Extensions for SASL2, I found 2 issues
OF-3361 - you can't send weird things mid authentication
OF-3362 - you can't send another authenticate after success
This PR fixes both.