[gnutls-devel] GnuTLS | WIP: TLS 1.3: ignore "early_data" extension (!706)

Daiki Ueno gitlab at mg.gitlab.com
Mon Jul 16 18:10:21 CEST 2018

New Merge Request !706


Branches: tmp-skip-zero-rtt to master
Author:    Daiki Ueno
Approvers: Simon Josefsson, Nikos Mavrogiannopoulos, Hubert Kario, Tim Rühsen, Andreas Metzler, Tom, Ander Juaristi, Tomáš Mráz and Anderson Sasaki

This fixes #512. Since 0-RTT is not implemented yet, this patch let the server fallback to 1-RTT if it received the "early_data" extension. The semantics follows the first option suggested in [4.2.10](https://tlswg.github.io/tls13-spec/draft-ietf-tls-tls13.html#rfc.section.4.2.10), which ignores decryption failure up to `max_early_data_size`.

The test case is currently missing, but it should be covered by tlsfuzzer once the branch is merged.

## Checklist
 * [x] Code modified for feature
 * [x] Documentation updated

## Reviewer's checklist:
 * [ ] Any issues marked for closing are addressed
 * [ ] There is a test suite reasonably covering new functionality or modifications
 * [ ] Function naming, parameters, return values, types, etc., are consistent and according to `CONTRIBUTION.md`
 * [ ] This feature/change has adequate documentation added
 * [ ] No obvious mistakes in the code

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