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ryan4yin | 二花 7cfda39c2c feat: log in and sudo over SSH with a CanoKey touch
The CanoKey resident SSH key (`ryan@canokey-moe`, the backup once a new primary key is enrolled) is now authorized for ryan and root on every host, and sudo on server and agent hosts accepts its touch through the forwarded agent (`pam_rssh`). Without the key or a forwarded agent, sudo asks for the password and login falls back to the file keys. Only `canokeySshKeys` can satisfy sudo.

Risks to weigh:

- Colmena deploys need one touch per host connection, since the agent offers the CanoKey key first.
- Desktops now forward the agent to every `hostsAddr` alias, as they already did for `192.168.*`; while a session is open, root there can request signatures, each needing a touch.

### Verification

- `just test` exits 0; CI passed on the first commit.
- Evaluated: sudo PAM stack `rssh` → `unix` → `deny` on shoryu, kana, akane and k3s-test-1-master-1, ai-niri keeps `pam_u2f`; shoryu root and ryan list `ryan@canokey-moe`.
- Not yet verified on a running host.

### Manual step after merge

Deploy the servers, then `just niri`; close old multiplexed connections (`ssh -O exit <host>`) and try `sudo true` over SSH.

AI assistance: DeepSeek Harness (claude-opus-5-5).

Assisted-by: DeepSeek Harness (claude-opus-5-5)
2026-11-06 03:26:59 -06:00
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