randombit/botan

[TLS 1.3] Check the Implementation against RFC 9846

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#5,719 opened on Jul 13, 2026

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good first issue

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Description

RFC 9846 is an updated version of RFC 8446 that tightens some requirements and clarifies some details. The new revision is fully backward-compatible with the old one, though. Check if we're compliant and fix things as needed. Brownie-points for updating all RFC references in the code (as an independent PR).

Contributor guide

Research direction
Review RFC 9846 and compare with current TLS 1.3 implementation in Botan. Identify discrepancies and propose fixes. Optionally, update RFC references to point to 9846.
Tech stack
cpp
Domain
security
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
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
C++TLS 1.3 knowledgeRFC reading
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30