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  1. JDK
  2. JDK-8326643

JDK server does not send a dummy change_cipher_spec record after HelloRetryRequest message

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        JDK server does not send a dummy change_cipher_spec record after HelloRetryRequest message.

        According to RFC 8446 (Transport Layer Security (TLS) Protocol Version 1.3) Appendix D.4 (Middlebox Compatibility Mode), if the client sends a non-empty session ID in the ClientHello message, the server sends a dummy change_cipher_spec (CCS) record immediately after its first handshake message. This may either be after a ServerHello or a HelloRetryRequest.
        https://datatracker.ietf.org/doc/html/rfc8446#appendix-D.4

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                pkoppula Prasadarao Koppula
                shadowbug Shadow Bug
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