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[quicwg/base-drafts] Prohibit TLS middlebox compatibility mode (#3594)

Martin Thomson <notifications@github.com> Wed, 22 April 2020 22:27 UTC

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Date: Wed, 22 Apr 2020 15:27:35 -0700
From: Martin Thomson <notifications@github.com>
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Subject: [quicwg/base-drafts] Prohibit TLS middlebox compatibility mode (#3594)
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This came up in interop testing.  This mode causes the TLS stack to generate a ChangeCipherSpec message, which caused our server to crash.  That's a bug on our end, but it's still a problem.

We need to decide whether this mode is acceptable.  Right now, we only say that it is "redundant".  A prohibition this mode would be easier all around.  It would avoid spending 32 bytes for both endpoints too.

Unfortunately, this is a design change.

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