linux-credentials / linux-credentials/credentialsd

Provide an SSH_SK_PROVIDER for openssh

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#109 2 comments 0 reactions 0 assignees View on GitHub

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enhancement
Dominant language
Rust
Stars
259
Forks
19
Avg merge
1d 2h
Merged PRs (30d)
12

Description

Openssh comes with built-in support for security keys through linking against `libfido2`.

However, they also support loading a `SSH_SK_PROVIDER` shared library instead (implementing the https://github.com/openssh/openssh-portable/blob/master/sk-api.h functions).

Would be neat if we can provider a small shim that supports this so that `openssh` can be used with `credentialsd` instead of `libfido2`

Contributor guide

Open the contributing guide

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 OpenSSH's sk-api.h, linked from the issue, and identify the shared-library interface that the shim must implement. Then inspect credentialsd's existing WebAuthn/passkey support and determine how it can back those calls. Done means OpenSSH can use the provider with credentialsd instead of linking against libfido2.

Written by the indexing model from the issue text.

Assessment

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

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