Installing the agent with one key is now all it takes to add a host.
New `join_key` config field, presented while auth_token is empty. The SSO
exchanges it for this agent's own token and the public key it must pin,
both delivered in the config frame; the agent persists them and blanks
the join key. Nothing has to be copied between two machines by hand.
PersistEnrollment rewrites only the credential lines -- line-based rather
than a YAML round-trip -- so operator comments, the capability matrix and
formatting survive. It re-reads afterwards so the credential is live
without a restart, and keeps the file 0600.
The connect URL carries ?hostname= so a self-enrolling host is named
after itself, and the agent refuses to connect at all (with a long
back-off) when it has no credential rather than presenting an empty one.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Implements protocol v1.2.0.
verifySignature() returned true when no public_key was configured,
logging "skipping signature verification". The SSO installer never wrote
a public_key, so a default install executed reboot, service_restart,
configure_ldap, arbitrary_bash and update_binary UNVERIFIED from anything
that could reach its socket. An agent that cannot verify now refuses.
Canonicalization also disagreed with the server. Go's encoding/json
escapes <, > and & by default; JSON.stringify does not. Any payload
containing them hashed differently on each side and failed verification
-- for arbitrary_bash that is most real scripts (`>` redirection, `&&`).
Now uses json.Encoder with SetEscapeHTML(false), trailing newline
trimmed.
The SSO now rejects tokens it did not issue. Handles its close codes
(4001/4002/4003/4004) and backs off 5 minutes on an enrollment failure
instead of retrying every 5s forever. The connect log no longer prints
the URL, which carried ?token=.
install.sh gains --public-key and warns when none is configured.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
wmantly