tls: preserve servername on resumed sessions#62067
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jorgitin02 wants to merge 1 commit intonodejs:mainfrom
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tls: preserve servername on resumed sessions#62067jorgitin02 wants to merge 1 commit intonodejs:mainfrom
jorgitin02 wants to merge 1 commit intonodejs:mainfrom
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This can't land without a single test.
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OpenSSL's SSL_get_servername() returns NULL on server-side TLS 1.3 resumed sessions because it reads from ssl->ext.hostname rather than the session hostname persisted for resumption. Fix this by explicitly storing the SNI hostname on the SSL session in the server-side SNI callback when the handshake provides a hostname, then falling back to SSL_SESSION_get0_hostname() when SSL_get_servername() returns NULL on resumed sessions. Add a regression test that verifies servername is preserved across resumed TLS 1.3 sessions and that the fallback does not regress TLS 1.2 behavior. Fixes: nodejs#57175 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
SSL_SESSION_get0_hostname()whenSSL_get_servername()returnsNULLon resumed TLS 1.3 sessions.Fixes: #57175