tegwick
02b15a7f72
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Assistant: claude-code Assistant-Model: opus Assistant-Process: 3775@bnt-lap001 Assistant-Session: cfacb6a5-ad5b-4f79-ac67-053e3b0d34a3
84 lines
4.1 KiB
Markdown
84 lines
4.1 KiB
Markdown
# ops-warden secret-read example (`flex-auth-ops-warden-fetch`)
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Policy, registry and fixtures for ops-warden's **secret-fetch** policy check
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(`check_fetch_policy` in ops-warden `src/warden/policy.py`): before
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`warden access <need> --fetch/--exec` proxies a non-SSH credential read, it asks
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whether `read` on `secret:<need_id>[/<domain>]` owned by `<owner_repo>` is
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allowed. Opened by the-custodian bug `b792c5d0` (CUST-WP-0075): those checks
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were sent to the SSH signing pin `flex-auth-ops-warden`, whose package admits
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only `resource.system == "ops-warden"` and whose caller bindings know only that
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system, so every other owner got 403.
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| File | What it is |
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| --- | --- |
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| `policy_package.md` | `ops-warden.secret.read` v1, `allow_ttl: 5m`; the `catalog_lanes` block is generated |
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| `registry_snapshot.json` | generated: one system per owner, one `secret:<need_id>` resource per lane |
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| `policy_fixtures.yaml` | 15 fixtures: 4 allows, 11 denial branches |
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| `check_request_*.json` | standalone requests for `POST /v1/check` |
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| `../../values/ops-warden-fetch.yaml` | the pin; caller bindings generated, image digest set by hand after CI |
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## Why a separate pin
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One decision class per pin, independently rollable (FLEX-WP-0016). The server
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serves one policy package per process. SSH signing (`sign` on
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`ssh-certificate`, system `ops-warden`) and secret reads (`read` on `secret`,
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system = owner repo) differ in action, resource type, systems and caller
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bindings. Folding reads into the signing pin would redeploy the lane the
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ops-bridge tunnels depend on for every catalog change.
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## The rule
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Allow when all hold, otherwise deny with the first failing reason:
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`action == read` (`wrong_action`), `resource.type == secret`
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(`wrong_resource_type`), tenant `tenant:platform` (`wrong_tenant`),
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`subject.type == operator` (`wrong_subject_type`), non-empty subject id
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(`missing_subject`), `context.need_id` present (`missing_need_id`) and in the
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catalog set (`unknown_need`), `resource.system` a catalog owner
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(`unknown_system`) and the owner of that need (`wrong_system`),
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`resource.id == secret:<need_id>` or `secret:<need_id>/<context.domain>`
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(`resource_need_mismatch`), `context.owner_repo == resource.system`
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(`owner_repo_mismatch`).
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Caller authentication is `enforce`: every owner system is bound to
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`system:serviceaccount:ops-warden:ops-warden`. Another caller, an anonymous
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call, or an owner system missing from the bindings is rejected with 401/403
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before the package runs.
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For a registered resource the registry's `type` wins over the caller's
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(FLEX-DEC-2026-012), so a non-secret type only reaches the package on an
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unregistered id; the package denies it either way.
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## Regenerate when the catalog changes
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The readable set is every ops-warden catalog entry with `status: active`,
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`exec_capable: true` and `lane: secret`. After a lane is added or retired:
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```bash
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python3 tools/gen_ops_warden_fetch.py # rewrites the three generated files
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python3 tools/gen_ops_warden_fetch.py --check # exit 1 on drift (tests/stage1.sh runs it)
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go run ./cmd/flex-auth test-policy --file examples/ops-warden-fetch/policy_package.md
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```
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`--catalog PATH` overrides the default `~/ops-warden/registry/routing/catalog.yaml`.
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A new **owner system** adds a caller binding, so it needs a pin redeploy. A new
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lane under an existing owner changes only the package and registry, which are
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baked into the image, so it needs a new image too (`deploy/README.md`).
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## Verify
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```bash
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go run ./cmd/flex-auth test-policy --file examples/ops-warden-fetch/policy_package.md # 6 Rego tests, 15 fixtures
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go run ./cmd/flex-auth load-registry -file examples/ops-warden-fetch/registry_snapshot.json
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go test ./cmd/flex-auth -run OpsWardenFetch
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```
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## Not yet deployed
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`values/ops-warden-fetch.yaml` carries no image digest until CI builds an image
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containing this directory. The deploy steps (founder go required) are in
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`workplans/ADHOC-2026-10-03.md`.
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Residual (build mode, close-down checklist row 1): `subject.id` is whatever
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ops-warden sends (its subject env or `operator`); it is not bound to an attended
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human identity. The caller binding proves that ops-warden asked, not which
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operator did.
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