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Re: [quicwg/base-drafts] Use the same KDF regardless of TLS version (#2034)

Kazuho Oku <notifications@github.com> Wed, 21 November 2018 07:57 UTC

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Subject: Re: [quicwg/base-drafts] Use the same KDF regardless of TLS version (#2034)
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> If it isn't, then we'll have interop failure. If it is, that will artificially hamper 1.4 deployment.

The answer depends on what type of API the TLS stacks would provide. For example, it would not be an issue for a TLS stack that exposes a “method” that creates a AEAD context from a TLS connection.

Anyways, if we are to use the same HKDF construction for TLS 1.4 and above, I do not see the reason for having the “tls13 ” prefix. Should we revert #1991 to reduce the number of changes?

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