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Why is there a mix of TLS 1.3 and 1.2?

meandmycode
Member Posts: 36 Blue Ribbon
Hi,
I have tested TLS 1.3 vs a server that supports it. It is a bit confusing since I see both TLS 1.2 and 1.3 write/reads when I have enabled logging using -Djavax.net.debug=all
I have changed my code and use jdk 11 latest (11.0.14).
Here is the code change:
private static final String[] VERSIONS = new String[] { "TLSv1.2","TLSv1.3"}; ((SSLSocket) socket).setEnabledProtocols(VERSIONS);
I have attached the log.
Here are my questions:
- Why is there a mix of TLS 1.3 and 1.2 READ and WRITE? There are |WRITE: TLSv1.3 handshake, length = 2064 (no READ). READ: TLSv1.2 handshake, length = 122 ( no WRITE). It seems that the 1.3 was negotiated.
- When 1.3 is negotiated should not READ and WRITE both be using 1.3?
- Is my handshake complete?
I have attached my log too.
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