tlsfuzzer/tlslite-ng

Add support for ECH

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#544 opened on Jan 30, 2025

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complexenhancementhelp wanted

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Description

Hello,

It would be nice if support for Encrypted ClientHello (ECH) could be added. It's becoming mainstream, most browsers support it now.

It replaces ESNI:

Perhaps https://github.com/tlsfuzzer/tlslite-ng/issues/345 can then be closed.

Contributor guide

Research direction
Study the ECH specification (draft ietf tls esni) and understand how it integrates with the existing tlslite ng codebase. Focus on the client side and server side ECH extensions, and how to implement them in Python.
Tech stack
python
Domain
security
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
5
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Over 1 week
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
PythonTLS basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20