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Phase 5 Runbook (Session Reuse Prototype)

This runbook starts a minimal k_server + k_proxy prototype for session reuse testing.

What This Prototype Covers

k_proxy creates short-lived sessions.
Session creation uses a card-presence check (fido2_probe.py --json) as the current auth gate.
Valid sessions can repeatedly access a protected k_server counter endpoint without re-running card auth each request.
Session status and logout/invalidation paths are implemented.

Start Services

In k_server VM:

python3 /home/user/chromecard/k_server_app.py --host 127.0.0.1 --port 8780 --proxy-token dev-proxy-token

In k_proxy VM:

python3 /home/user/chromecard/k_proxy_app.py \
  --host 127.0.0.1 \
  --port 8770 \
  --session-ttl 300 \
  --server-base-url http://127.0.0.1:8780 \
  --proxy-token dev-proxy-token

Test Flow

Create a session (runs auth gate once):

curl -sS -X POST http://127.0.0.1:8770/session/login \
  -H 'Content-Type: application/json' \
  -d '{"username":"alice"}'

Copy session_token from response, then:

TOKEN='<paste-token>'

Check session:

curl -sS -X POST http://127.0.0.1:8770/session/status \
  -H "Authorization: Bearer $TOKEN"

Call protected resource multiple times (should not require new login):

curl -sS -X POST http://127.0.0.1:8770/resource/counter \
  -H "Authorization: Bearer $TOKEN"
curl -sS -X POST http://127.0.0.1:8770/resource/counter \
  -H "Authorization: Bearer $TOKEN"

Logout/invalidate:

curl -sS -X POST http://127.0.0.1:8770/session/logout \
  -H "Authorization: Bearer $TOKEN"

Re-check after logout (should fail with 401):

curl -i -X POST http://127.0.0.1:8770/resource/counter \
  -H "Authorization: Bearer $TOKEN"

Current Limitation

This uses card-presence probing, not a full WebAuthn assertion verification path.
Intended as a Phase 5 starter for session semantics and proxy/server behavior.