Termix-SSH / Termix-SSH/Support

[FEATURE] Support Fido2 SSH Keys

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feature ssh
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Forks
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PR merge metrics
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Description

Title

Support for FIDO2 ed25519-sk SSH keys

Platform

N/A

Is it related to an issue?

My Servers accounts are only accessible with an ed25519-sk key and the corresponding fido2 security usb stick.
When I pasted my ed25519-sk private key into termix, it was not able to decode it.

The Solution

Support the keys. Note that that requires interacting with the usb key, like waiting until its touched or asking the user for a pin when trying to use the ssh key.

Additional Context

Some info about that:
https://developers.yubico.com/SSH/Securing_SSH_with_FIDO2.html

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with the issue description and the linked Yubico FIDO2 SSH documentation. Identify where Termix parses and uses SSH private keys, then determine how ed25519-sk keys, security-key touch prompts, and PIN requests fit into that flow. Done means these keys can authenticate successfully with the required USB-key interaction.

Written by the indexing model from the issue text.

Assessment

Domain
authentication, cryptography, security
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
35/100

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