6bd5741a4c
This required adding a new field to SessionState for TLS 1.0–1.2, since the key exchange is not repeated on resumption. The additional field is unfortunately not backwards compatible because current Go versions check that the encoding has no extra data at the end, but will cause cross-version tickets to be ignored. Relaxed that so we can add fields in a backwards compatible way the next time. For the cipher suite, we check that the session's is still acceptable per the Config. That would arguably make sense here, too: if a Config for example requires PQ, we should reject resumptions of connections that didn't use PQ. However, that only applies to pre-TLS 1.3 connections, since in TLS 1.3 we always do a fresh key exchange on resumption. Since PQ is the only main differentiator between key exchanges (aside from off-by-default non-PFS RSA, which are controlled by the cipher suite in TLS 1.0–1.2) and it's PQ-only, we can skip that check. Fixes #67516 Change-Id: I6a6a465681a6292edf66c7b8df8f4aba4171a76b Reviewed-on: https://go-review.googlesource.com/c/go/+/653315 Reviewed-by: David Chase <drchase@google.com> Auto-Submit: Filippo Valsorda <filippo@golang.org> Reviewed-by: Daniel McCarney <daniel@binaryparadox.net> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Roland Shoemaker <roland@golang.org> |
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README.md
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