JSSE: SunJSSE test fixes

[rlm2002]

Removes checkAndInitSSLSocket() call in WolfSSLSocket.close(). Function is meant to be called when initializing SSL Socket. Calling during close is counter-intuitive and causes a second, unnecessary exception to be thrown if connection failed during checkAndInitSSLSocket() at EngineHelper.loadKeyAndCertChain().

Fixes SunJSSE test NetSSLCiphersuites/ECCurvesconstraints.java

Sets this.closed = true when receiving a FATAL_ALERT in unwrap() or if buffered data was sent, inbound was closed and close_notify sent in wrap(). Buffer should not receive any more data.

Fixes SunJSSE tests SSLEngine/EngineCloseOnAlert.java and SSLEngineImpl/SSLEngineFailedALPN.java

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Removes an out-of-place SSL initialization call from the socket shutdown path to prevent redundant/secondary exceptions during close() after handshake/init failures, unblocking a failing SunJSSE test.

Changes:

• Removes checkAndInitSSLSocket() invocation from WolfSSLSocket.close()
• Eliminates the associated close-path comment that suggested SSL init during shutdown

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.