From ce0e361afa1c4648de0676bd373d4e4e9bd04b43 Mon Sep 17 00:00:00 2001 From: Fredrik Ahlgren Date: Thu, 15 Oct 2026 19:04:46 +0200 Subject: [PATCH 1/8] feat(contract): agents, their approval signature and roster entry Names and wire for agents: an assistant through MCP, Sourceful support for one ticket, and the release check. docs/agents.md is the normative text; Core enforces it in a later pull request. - Registry copy: roles agent, support and release; scopes for logs, config, diagnostics, capped holds, owner-confirmed requests and update requests; an agent scope on each op; access.agents; eight refusals; push kinds agent.added and agent.request. - gencontract reads the ops' agent scope into RegistryAgentOps, emits role names into go/protocol for FTW Cloud, and counts hold and request scopes as writes. - go/protocol/agents.go: the agent messages, limits, and the approval signature: ECDSA P-256 over deterministic CBOR, with golden vectors in testdata/approval-vectors.json for the phone and FTW Cloud. - cloudwire: a roster Device may carry an agent grant (scopes, ops, caps, expiry, principal). Envelopes may carry by, the staff id on a support call. - appenroll refuses an agent's role on a pairing code or a role change. Co-Authored-By: Claude Opus 5.5 --- .changeset/agents-contract.md | 5 + contract/push-catalogue.yaml | 11 + contract/registry.yaml | 68 ++- docs/agents.md | 508 ++++++++++++++++++ docs/protocol-cloud.md | 51 +- go/internal/apiauth/apiauth.go | 7 + go/internal/apiauth/contract_gen.go | 39 ++ go/internal/appenroll/enroll.go | 6 +- go/internal/appenroll/roles_test.go | 24 + .../appproto/gencontract/gencontract.go | 62 ++- go/protocol/agents.go | 371 +++++++++++++ go/protocol/agents_test.go | 343 ++++++++++++ go/protocol/cloudwire/allowlist.go | 11 +- go/protocol/cloudwire/messages.go | 15 + go/protocol/contract_gen.go | 78 ++- go/protocol/envelope.go | 4 + go/protocol/push_gen.go | 4 + go/protocol/testdata/approval-vectors.json | 43 ++ 18 files changed, 1621 insertions(+), 29 deletions(-) create mode 100644 .changeset/agents-contract.md create mode 100644 docs/agents.md create mode 100644 go/protocol/agents.go create mode 100644 go/protocol/agents_test.go create mode 100644 go/protocol/testdata/approval-vectors.json diff --git a/.changeset/agents-contract.md b/.changeset/agents-contract.md new file mode 100644 index 000000000..d660f69d0 --- /dev/null +++ b/.changeset/agents-contract.md @@ -0,0 +1,5 @@ +--- +"ftw": patch +--- + +The registry names agents: an assistant, Sourceful support for one ticket and the release check, with their roles, scopes, the scope that opens each command to an agent, their refusals and two push kinds. `docs/agents.md` specifies how the box will enforce them; this release only names them, and no pairing code or role change can hand an agent's role to a phone. diff --git a/contract/push-catalogue.yaml b/contract/push-catalogue.yaml index 8473df44a..4dfe934d2 100644 --- a/contract/push-catalogue.yaml +++ b/contract/push-catalogue.yaml @@ -60,3 +60,14 @@ events: # To every owner, when FTW Cloud is turned off at either door. title: FTW Cloud is off body: "Your box stopped sharing with FTW Cloud and asked it to delete its copy." + - kind: agent.added + # To every owner, when an owner gives an assistant, Sourceful support or + # the release check access to the box. Access from outside the house is + # news every owner should hear, as with cloud.granted. + title: New access to your box + body: "You gave an assistant or Sourceful access. See who has access in the app." + - kind: agent.request + # To every owner, when an agent asks for a durable change. It waits for + # one of them to confirm it, and runs out after twelve hours. + title: Waiting for your answer + body: "An assistant asks to change a setting. Open FTW to confirm or decline." diff --git a/contract/registry.yaml b/contract/registry.yaml index 63b4de553..50c60088b 100644 --- a/contract/registry.yaml +++ b/contract/registry.yaml @@ -111,9 +111,16 @@ capabilities: # watch codes. Absent means the phone offers no Add watch. The wire is # docs/watch-exchange.md in srcfl/ftw-webapp. - cmd.exchange + # The box takes agents: assistants, Sourceful support and the release + # check, each an owner's grant with scopes, ops, caps and an expiry, and it + # answers the agent.* messages and approval.key.set (docs/agents.md in + # srcfl/ftw). Absent means the app offers no Access list. + - access.agents # --------------------------------------------------------------------------- -# Scopes. One object axis, two verb axes: .. +# Scopes. One object axis and a verb: .. +# read and write are a phone's. run changes nothing, hold acts for a capped +# time and ends unless renewed, and request waits for an owner to confirm. # Roles are a UI projection over these, never a replacement for them. # --------------------------------------------------------------------------- scopes: @@ -127,6 +134,12 @@ scopes: - { name: ftw.mode.write, desc: Change site operating mode } - { name: ftw.members.read, desc: See who has access } - { name: ftw.members.write, desc: Invite and revoke } + - { name: ftw.logs.read, desc: Log excerpts the box redacts } + - { name: ftw.config.read, desc: Configuration the box redacts } + - { name: ftw.diag.run, desc: Checks that change nothing } + - { name: ftw.dispatch.hold, desc: Hold energy assets for a capped time } + - { name: ftw.goals.request, desc: Ask an owner to change a durable goal } + - { name: ftw.update.request, desc: Ask an owner to install a version } roles: owner: @@ -142,6 +155,23 @@ roles: watch: label: Watch scopes: [ftw.live.read, ftw.plan.read, ftw.events.read, ftw.dispatch.write] + # Agents: grants an owner gives to something other than a paired device. + # A role here is the most a grant of that kind may carry. Each grant names + # a subset, and each check keeps only what the approving owner holds at + # that moment, as for a watch. An agent reaches the box only through FTW + # Cloud's tunnel. See docs/agents.md in srcfl/ftw. + # + # agent is a personal assistant. support is Sourceful for one ticket. release + # is the release check, which reads a health summary and nothing else. + agent: + label: Assistant + scopes: [ftw.live.read, ftw.history.read, ftw.plan.read, ftw.health.read, ftw.events.read, ftw.logs.read, ftw.config.read, ftw.diag.run, ftw.dispatch.hold, ftw.goals.request] + support: + label: Sourceful support + scopes: [ftw.live.read, ftw.history.read, ftw.plan.read, ftw.health.read, ftw.events.read, ftw.logs.read, ftw.config.read, ftw.diag.run, ftw.dispatch.hold, ftw.goals.request] + release: + label: Release check + scopes: [ftw.health.read] # --------------------------------------------------------------------------- # FTW Cloud. What an owner can let the box share with FTW Cloud, and why. @@ -170,15 +200,21 @@ cloud_purposes: [serve, stats] # does not implement is answered with E_UNKNOWN_OP like any other stranger — # battery.hold is the app's vocabulary today and no shipping box acts on it # yet. +# +# agent is the scope that opens the op to an agent, and its verb says how. +# ftw.dispatch.hold runs now as a cmd, within the grant's caps, and must end +# by itself. ftw.goals.request never runs as a cmd: it waits as an +# agent.request until an owner confirms it. An op without agent is never +# open to an agent. # --------------------------------------------------------------------------- ops: - - { name: site.mode.set, scope: ftw.mode.write, desc: Change the site operating mode } - - { name: planner.prefs.set, scope: ftw.mode.write, desc: Set household planner preferences } - - { name: battery.hold, scope: ftw.dispatch.write, desc: Hold the battery at a fixed setpoint } - - { name: loadpoint.hold, scope: ftw.dispatch.write, desc: Charge the car now at a fixed current } - - { name: loadpoint.boost, scope: ftw.dispatch.write, desc: Boost the car from the house battery } - - { name: loadpoint.soc.set, scope: ftw.dispatch.write, desc: Correct the car's current charge level } - - { name: loadpoint.surplus_only.set, scope: ftw.dispatch.write, desc: Charge the car from surplus PV only } + - { name: site.mode.set, scope: ftw.mode.write, agent: ftw.goals.request, desc: Change the site operating mode } + - { name: planner.prefs.set, scope: ftw.mode.write, agent: ftw.goals.request, desc: Set household planner preferences } + - { name: battery.hold, scope: ftw.dispatch.write, agent: ftw.dispatch.hold, desc: Hold the battery at a fixed setpoint } + - { name: loadpoint.hold, scope: ftw.dispatch.write, agent: ftw.dispatch.hold, desc: Charge the car now at a fixed current } + - { name: loadpoint.boost, scope: ftw.dispatch.write, agent: ftw.dispatch.hold, desc: Boost the car from the house battery } + - { name: loadpoint.soc.set, scope: ftw.dispatch.write, agent: ftw.goals.request, desc: Correct the car's current charge level } + - { name: loadpoint.surplus_only.set, scope: ftw.dispatch.write, agent: ftw.goals.request, desc: Charge the car from surplus PV only } # --------------------------------------------------------------------------- # Dispatch modes. @@ -240,6 +276,22 @@ errors: # or doing it needs somebody standing at the box. Not a permission the owner # is missing, so neither a role nor a ceremony changes the answer. - { code: E_LOCAL_ONLY, retryable: false, desc: Route is served only on the box's own page } + # Agents' refusals (docs/agents.md in srcfl/ftw). Each is a different + # sentence to an owner reading the audit log or an assistant reading its + # answer, so none reuses a code above. + # + # E_RATE_LIMITED is retryable because the same command goes through once + # the grant's minute has room. E_CAP_EXCEEDED is not: the box refuses an + # argument past a cap rather than clipping it, and the same argument gets + # the same answer. + - { code: E_GRANT_EXPIRED, retryable: false, desc: Access ran out at its expiry } + - { code: E_OP_NOT_GRANTED, retryable: false, desc: The grant does not list this operation } + - { code: E_CAP_EXCEEDED, retryable: false, desc: An argument or a count is past its cap } + - { code: E_RATE_LIMITED, retryable: true, desc: Too many commands for the grant's rate } + - { code: E_NEEDS_OWNER, retryable: false, desc: A durable change waits for an owner as agent.request } + - { code: E_BAD_SIGNATURE, retryable: false, desc: The approval signature is missing or does not verify } + - { code: E_NO_APPROVAL_KEY, retryable: false, desc: This phone has no approval key on the box } + - { code: E_NOT_FOUND, retryable: false, desc: No such agent or request } # --------------------------------------------------------------------------- # Error codes the client raises for itself. diff --git a/docs/agents.md b/docs/agents.md new file mode 100644 index 000000000..883ca4300 --- /dev/null +++ b/docs/agents.md @@ -0,0 +1,508 @@ +# Agents and support access + +Proposed. Nothing here has shipped. This document is normative: "must" is a +requirement on the box, FTW Cloud or the app. It extends the app protocol +([srcfl/ftw-webapp docs/protocol.md](https://github.com/srcfl/ftw-webapp/blob/main/docs/protocol.md)) +and the [FTW Cloud protocol](protocol-cloud.md). Names in `code` that are +scopes, roles, operations, error codes, capabilities or push kinds live in +`contract/registry.yaml` and `contract/push-catalogue.yaml`. The message +shapes and the approval digest live in `go/protocol/agents.go`, with golden +vectors in `go/protocol/testdata/approval-vectors.json`. + +## What it is for + +An owner can let something other than a paired phone reach the box: + +- a personal assistant (ChatGPT, Claude, Grok) through MCP at + `https://cloud.ftw.energy/mcp`; +- Sourceful support, for one ticket; +- the release check, which reads a health summary while the box runs a beta. + +FTW Cloud holds the agent's private key and opens its session. The box +decides everything: the role, the scopes, the operations, the caps and the +expiry. The cloud can admit an agent; only the box can let it act. Each +check runs again on every call, so a revoke or an expiry bites at the next +call whatever the cloud does. + +## Principals + +| Role | Who | Granted by | Longest grant | Ends | +|---|---|---|---|---| +| `agent` | A personal assistant | An owner, in the app or on the box page | 30 days, renewable | Expiry, revoke, or removal of the approving phone | +| `support` | Sourceful, for one ticket | An owner, from "Get help" | 14 days | Expiry, revoke, the ticket closing, or removal of the approving phone | +| `release` | The release check | An owner, on joining the beta | 90 days, renewable | Expiry, revoke, or removal of the approving phone | + +- Every agent row has a wall-clock expiry. There is no grant without one. +- **Scopes come from the approver at call time.** An agent holds the scopes + its row lists that its approver holds now: the approving phone's role + today, or every scope for a grant made on the box page. A phone demoted to + viewer narrows its agents at the next call. Removing the phone removes its + agents, as it removes its watches. +- **A support call names a person.** Each envelope a `support` session sends + carries `by`: the staff member's id at Sourceful, at most 64 bytes. The box + refuses a call without it and writes it to the audit log. The box cannot + check it; FTW Cloud signs the staff member in and asserts it. +- **The ticket closing ends the grant.** When a ticket closes, Sourceful's + tooling sends `agent.revoke` for its own row. An agent may always revoke + itself. The expiry is the backstop. +- **The release check reads one thing.** Its role carries `ftw.health.read` + and nothing else, and it answers only `hello` and `health.get`. + +## Scopes + +Agent scopes reuse the phone scopes where they mean the same thing and add +these: + +| Scope | Lets an agent | +|---|---| +| `ftw.logs.read` | Read a log excerpt that the box redacts before it leaves | +| `ftw.config.read` | Read the configuration, redacted on the box | +| `ftw.diag.run` | Run checks that change nothing | +| `ftw.dispatch.hold` | Hold a device for a capped time; the hold ends unless renewed | +| `ftw.goals.request` | Ask for a durable change, which waits for an owner | +| `ftw.update.request` | Later: ask to install a version, which an owner confirms | + +The roles `agent` and `support` carry at most `ftw.live.read`, +`ftw.history.read`, `ftw.plan.read`, `ftw.health.read`, `ftw.events.read`, +`ftw.logs.read`, `ftw.config.read`, `ftw.diag.run`, `ftw.dispatch.hold` and +`ftw.goals.request`. A grant names a subset. Agents read by default; an owner +ticks control to add `ftw.dispatch.hold` or `ftw.goals.request`. + +## What each scope opens + +An agent session is the app session, `ftw.session.v1`, between the agent's +key and the box. It uses the messages below and no others. The box answers +any other request from an agent with `E_SCOPE_DENIED`. A phone's session is +unchanged by this document, except that the new reads below check their +scope for phones too. + +| Message | Needs | Answer | +|---|---|---| +| `hello` | — | `hello_ok`, with the role and the scopes the agent holds now | +| `sub` | `ftw.live.read` | The live stream, as for a phone | +| `plan.get`, `price.get` | `ftw.plan.read` | `plan`, `price` | +| `hist.query` | `ftw.history.read` | `hist.chunk` | +| `health.get` | `ftw.health.read` | `health` | +| `events.get` | `ftw.events.read` | `events` | +| `logs.get` | `ftw.logs.read` | `logs` | +| `config.get` | `ftw.config.read` | `config` | +| `diag.run` | `ftw.diag.run` | `diag` | +| `cmd` | The op's agent scope, `ftw.dispatch.hold` | `cmd.ack`, `cmd.result` | +| `agent.request` | The op's agent scope, `ftw.goals.request` | `agent.ok` | +| `agent.list` | — | `agent.ok` with the agent's own row and requests | +| `agent.revoke` | — | `agent.ok`; only for the agent's own id | + +`api.req`, the passthrough, is refused to every agent with `E_SCOPE_DENIED`: +its routes are priced for an owner, not for an agent. A box that lacks one of +the reads answers `E_UNKNOWN_OP`, as it does for any message it does not +know. + +## Operations + +Each op in the registry may name an `agent` scope. An op without one is never +open to an agent. + +| Op | Phone scope | Agent scope | For an agent | +|---|---|---|---| +| `battery.hold` | `ftw.dispatch.write` | `ftw.dispatch.hold` | `cmd`, under the caps | +| `loadpoint.hold` | `ftw.dispatch.write` | `ftw.dispatch.hold` | `cmd`; `hold_s` from 1 to the cap, never 0 | +| `loadpoint.boost` | `ftw.dispatch.write` | `ftw.dispatch.hold` | `cmd`; `duration_s` from 1 to the cap, or `expires_at_ms` within it | +| `site.mode.set` | `ftw.mode.write` | `ftw.goals.request` | `agent.request` only | +| `planner.prefs.set` | `ftw.mode.write` | `ftw.goals.request` | `agent.request` only | +| `loadpoint.soc.set` | `ftw.dispatch.write` | `ftw.goals.request` | `agent.request` only | +| `loadpoint.surplus_only.set` | `ftw.dispatch.write` | `ftw.goals.request` | `agent.request` only | + +- **A per-grant allowlist.** A grant lists `ops`, a subset of the ops whose + agent scope the grant holds. The box refuses an op the grant does not list + with `E_OP_NOT_GRANTED`, even when the agent holds its scope. +- **A hold ends unless renewed.** `ftw.dispatch.hold` ops must carry an end + within `caps.holdS`. A `loadpoint.hold` with `hold_s` 0 is the persistent + operator hold, and an agent may never send one. Releasing a hold (`clear`, + `cancel`) needs only the op in the allowlist. +- **A durable change waits.** An agent that sends a `ftw.goals.request` op as + `cmd` gets `E_NEEDS_OWNER`, with `{use: "agent.request"}`. +- **The checks run in Core's order:** the command's expiry, a known op, the + live grant (revoke and expiry), the scope, then for an agent the + allowlist, the rate and the caps, then `expect.rev`, the dispatch gate and + the guards. +- **Its own command log.** An agent's command ids live under its own root, + `agent:`, never an owner's. + +## Caps + +| Cap | Meaning | Box limits | +|---|---|---| +| `holdS` | The longest hold, in seconds | 60 to 1,800. Required with `ftw.dispatch.hold` | +| `maxW` | The largest power a hold may set, in W | 1 to 100,000. Required with `ftw.dispatch.hold` | +| `perMin` | `cmd` and `agent.request` per rolling minute | 1 to 60. Default 6 | + +- A command past `holdS` or `maxW` gets `E_CAP_EXCEEDED`, with + `{cap, max}`. The box never clips an argument; it refuses, so the agent + knows what happened. +- A command past `perMin` gets `E_RATE_LIMITED`, with `{retryAfterMs}`. +- Reads are limited to 60 a minute per agent, by the box, whatever the caps + say. + +## Durable changes + +1. The agent sends `agent.request {op, args, why}`. `why` is at most 280 + bytes of the agent's own words, shown to the owner as the agent's, never + as the box's. +2. The box checks the op as for a `cmd`: known, granted, scope, rate. It + stores the request and answers `agent.ok {reqId, expiresAtMs}`. +3. The box pushes `agent.request` to every owner through its event path, and + writes an audit row. +4. An owner reads it with `agent.list` and answers with `agent.confirm`. + Approving needs an approval signature; declining needs none. +5. On approval the box runs the op on the confirming owner's session as a + command with id `req:`, under the owner's scopes and against fresh + state, and sends that session `cmd.ack` and `cmd.result`. Nothing the + agent sent decides whether it may act; the owner's confirmation does. +6. A request no owner answers within 12 hours expires. The box keeps a + decided or expired request for 24 hours, so the agent can read its state. + +Pending requests live in memory. A restart drops them, and the agent asks +again. + +## Messages + +All of these ride in the app session. Each request carries an envelope `id` +and gets `agent.ok` with that id, or `error` with that id and a code. + +### `approval.key.set` — an owner phone registers its approval key + +| Field | Type | Meaning | +|---|---|---| +| `pub` | bstr, 65 | P-256 public key, SEC1 uncompressed | +| `atMs` | int | The phone's wall clock | +| `sig` | bstr, 64 | Proof of possession: the approval signature over `pub` | + +Answer `{deviceId, setAtMs}`. Only an owner phone may send it, and only for +itself. A new key replaces the phone's old one and writes an audit row. +Errors: `E_SCOPE_DENIED` (not an owner), `E_BAD_SIGNATURE`, +`E_UNKNOWN_OP` with `{field}` for a malformed body. + +### `agent.add` — an owner grants access + +| Field | Type | Meaning | +|---|---|---| +| `key` | bstr, 32 | The agent's X25519 Noise static key | +| `role` | text | `agent`, `support` or `release` | +| `scopes` | [text] | Sorted, no repeats, within the role | +| `ops` | [text] | Sorted, no repeats, each with an agent scope in `scopes` | +| `caps` | `{holdS, maxW, perMin}` | Uints; 0 where not used | +| `expiresAtMs` | int | Wall clock, within the role's longest grant | +| `principal` | `{client, clientId, ticket}` | Text, each at most 256 bytes, empty where not used. `ticket` is required for `support` | +| `atMs` | int | The phone's wall clock | +| `sig` | bstr, 64 | Approval signature | + +Answer `{agent}`, the new [agent row](#agent-row). The box signs a new +roster that lists it, pushes `agent.added` to every owner and writes an audit +row. Errors: `E_SCOPE_DENIED` (not an owner phone), `E_NO_APPROVAL_KEY`, +`E_BAD_SIGNATURE`, `E_CAP_EXCEEDED` (`{cap, max}`, for a cap, the expiry, or +16 agent rows on the box), `E_UNAVAILABLE` (`{subsystem: "clock"}`), +`E_UNKNOWN_OP` (`{field}`). A key already paired as a phone or an agent is +`E_UNKNOWN_OP` with `{field: "key"}`. + +### `agent.widen` — an owner changes or renews a grant + +| Field | Type | Meaning | +|---|---|---| +| `id` | text | The agent row's id | +| `epoch` | uint | The row's epoch as the owner saw it | +| `scopes`, `ops`, `caps`, `expiresAtMs` | | The whole new grant, as in `agent.add` | +| `atMs`, `sig` | | As in `agent.add` | + +Any change other than a revoke needs a signature, narrowing included; one +rule is easier to check than two. The epoch rises. Errors as `agent.add`, +plus `E_NOT_FOUND` and `E_CONFLICT` (`{expected, actual}`) for a stale epoch. + +### `agent.revoke` — remove a grant + +`{id}`. From an owner, any agent row; from an agent, its own. No signature. +The row goes at once, its sessions end with `session.terminate {reason: +"revoked"}`, its pending requests are dropped, and the next roster leaves it +out. Answer `{id}`. Error: `E_NOT_FOUND`. + +### `agent.list` — who has access + +`{}`. To an owner: `{agents: [agent row], requests: [request], keys: +[{deviceId, setAtMs}]}`, every row on the box. To an agent: its own row and +its own requests. A viewer gets `E_SCOPE_DENIED`. + +### `agent.request` — an agent asks for a durable change + +`{op, args, why}`. `args` is the op's argument map, at most 1 KiB encoded. +Answer `{reqId, expiresAtMs}`. Errors: `E_OP_NOT_GRANTED`, `E_SCOPE_DENIED`, +`E_RATE_LIMITED`, `E_CAP_EXCEEDED` (`{cap: "pending", max: 4}` per agent, +16 per box), `E_UNKNOWN_OP`. + +### `agent.confirm` — an owner answers a request + +| Field | Type | Meaning | +|---|---|---| +| `reqId` | text | The request | +| `approve` | bool | Run it, or decline it | +| `atMs`, `sig` | | Required to approve. Absent to decline | + +Answer `{reqId, state, cmdId}`: `state` is `approved` or `declined`, and +`cmdId` is the command the box now runs on this session. Errors: +`E_NOT_FOUND` (unknown, decided or expired), `E_NO_APPROVAL_KEY`, +`E_BAD_SIGNATURE`, `E_SCOPE_DENIED`. + +### `audit.get` — what agents and owners did + +`{beforeSeq, n}`; `n` at most 200. To an owner phone: +`{rows: [audit row], more}`, newest first. Agents and viewers get +`E_SCOPE_DENIED`. + +### Agent row + +| Field | Type | Meaning | +|---|---|---| +| `id` | text | First 8 characters of the key in base64url, like a phone's device id | +| `key` | bstr, 32 | X25519 Noise static key | +| `role` | text | `agent`, `support` or `release` | +| `scopes`, `ops` | [text] | As granted | +| `caps` | `{holdS, maxW, perMin}` | | +| `expiresAtMs` | int | Wall clock | +| `principal` | `{client, clientId, ticket}` | | +| `approvedBy` | text | `app:` or `lan` | +| `addedAtMs`, `lastSeenMs` | int | Wall clock, 0 when unknown | +| `epoch` | uint | Rises with every change | + +### Request + +`{reqId, agent, op, args, why, atMs, expiresAtMs, state}`. `state` is +`pending`, `approved`, `declined` or `expired`. + +### Audit row + +`{seq, atMs, actor, role, principal, by, what, target, result}`. `actor` is +the caller subject (`agent:`, `app:`, `lan:
` or `box`); +`principal` is the client or ticket; `by` is the staff id on a support call; +`what` is the message type or op; `result` is `ok` or the error code. + +### Reads + +| Message | Request | Answer | +|---|---|---| +| `health.get` | `{}` | `health {version, uptimeS, clock, drivers: {ok, degraded, faulted, offline}, meter: {srcState, ageMs}, dispatchBlockedBy, planner: {solveMs, fallbacks}, refusals}` | +| `events.get` | `{n}`, at most 50 | `events {events}`, each the FTW Cloud `event` body | +| `logs.get` | `{n, level}`; `n` at most 200, `level` `warn` by default | `logs {lines: [{ts, level, src, msg}], dropped}` | +| `config.get` | `{}` | `config {doc}` | +| `diag.run` | `{check, src}`; `check` is `clock`, `link`, `meter`, `planner` or `driver` | `diag {check, ok, facts}` | + +A health field the box cannot fill is absent. `health` carries no readings +and no names: drivers are counted, and `src` is an opaque source id. + +## Redaction on the box + +`logs.get` and `config.get` build their answer on the box. Nothing leaves it +unredacted, and nothing is stored in the cloud. + +- **Logs.** The box keeps the time, the level, the message and, for a + driver's line, the driver's opaque source id in place of its name. It + replaces every name the configuration knows (site, drivers, devices, + loadpoints, vehicles), and removes IP and MAC addresses, host names, URLs, + e-mail addresses, quoted text, serial-like words (letters and digits mixed, + six or more), runs of seven or more digits, and anything that looks like a + credential: bearer and basic headers, secret-named keys and long tokens. A + line's attributes keep their keys; a value stays only when it is a number, + a boolean, a duration or a short lowercase word, and is otherwise replaced + by `[omitted]`. At most 200 lines and 32 KiB. +- **Config.** Every secret-named key is replaced by `***`. Names become + opaque ids. Location, addresses, host names, URLs, serials, MAC addresses, + vehicle ids, e-mail addresses and notification targets are removed. + +Redaction is a list of patterns, so text a driver writes in a shape none of +them matches can pass. Tests hold the cases above; a driver that logs +something new needs a new case. + +## The agent's roster entry + +The roster the box signs for FTW Cloud lists each agent row as a `Device` +with one extra map, `agent`: + +| Field | Type | Meaning | +|---|---|---| +| `id` | text | The row's id | +| `key` | bstr, 32 | X25519 Noise static key | +| `role` | text | `agent`, `support` or `release` | +| `scopes` | [text] | The readable copy's filter, as for a phone | +| `epoch` | uint | | +| `tun` | bool | Always true for a live agent row | +| `agent.scopes`, `agent.ops` | [text] | The grant, at the approver's scopes now | +| `agent.caps` | `{holdS, maxW, perMin}` | | +| `agent.expiresAtMs` | int | Wall clock | +| `agent.principal` | `{client, clientId, ticket}` | | + +- The box leaves out a row that has expired by its clock. While its clock is + `none`, it lists rows as they are and refuses their calls. +- FTW Cloud must stop admitting a row at `expiresAtMs` by its own clock, + without waiting for a roster. It must never admit an agent row through the + relay, which an agent never uses, and it may tighten caps but never loosen + them. + +## Agents use the tunnel only + +An agent's session reaches the box through FTW Cloud as `tun`. The relay +refuses it: a handshake over the relay from an agent's key ends as from a +stranger. The watch exchange refuses it too. + +## Expiry and revoke + +- **Expiry is wall clock.** The box checks it at the handshake, on every + call and once a second for an open session. An expired row ends its + session with `session.terminate {reason: "expired"}`, answers its next + call with `E_GRANT_EXPIRED` and leaves the roster. A sweep removes it and + writes an audit row. +- **No clock, no agents.** While the box clock is `none` (NTP has not + synchronised it), every call from an agent gets `E_UNAVAILABLE` with + `{subsystem: "clock"}`, and `agent.add` and `agent.widen` are refused the + same way. Owners' phones are not affected. +- **Revoke is immediate.** The row goes, the sessions end, and the next call + fails with `E_GRANT_REVOKED`, whatever the cloud admits. + +## The approval signature + +The passkey is the web app's (`app.ftw.energy`) and the box cannot check it, +so `stepUp` is only the app's word. Agent grants need something the box can +check. + +- **The key.** Each owner phone makes a P-256 key in the Secure Enclave, + usable only after Face ID or Touch ID with the current enrolment + (`biometryCurrentSet`). It cannot leave the phone. The phone registers the + public half with `approval.key.set` over its owner session. +- **What it signs.** `agent.add`, `agent.widen`, `agent.confirm` to approve, + and `approval.key.set` itself as proof of possession. `agent.revoke` and a + decline need no signature. +- **The bytes.** The signature is ECDSA P-256 with SHA-256 over the + deterministic CBOR (RFC 8949, section 4.2.1) of one array, encoded `r ‖ s` + in 64 bytes. CryptoKit's `signature(for:)` hashes the bytes itself, so the + phone passes the array's bytes, not their digest. + + ``` + ["ftw.approval.v1", what, boxKey, deviceId, atMs, ...fields] + ``` + + | `what` | Fields after `atMs` | + |---|---| + | `approval.key.set` | `pub` | + | `agent.add` | `key, role, scopes, ops, [holdS, maxW, perMin], expiresAtMs, client, clientId, ticket` | + | `agent.widen` | `id, epoch, scopes, ops, [holdS, maxW, perMin], expiresAtMs` | + | `agent.confirm` | `reqId` | + + `boxKey` is the box's X25519 static key (32 bytes, as in the QR code), so a + signature for one box is worth nothing at another. `deviceId` is the + signing phone's id, and the box checks it is the session's. Lists are + sorted with no repeats, empty text is `""`, and integers take their + shortest form. +- **Freshness.** `atMs` must be within 10 minutes of the box's wall clock, + and the box keeps each signature it accepted for 20 minutes and refuses it + a second time. A replayed `agent.confirm` finds no pending request; a + replayed `agent.widen` names an old epoch. +- **What it proves.** Someone passed Face ID on that phone and approved + exactly these bytes. It does not stop a modified app on an enrolled owner + phone from registering a new key of its own: that app could already send + commands. It stops a phone left unlocked on a table, and it lets the box + check approval without trusting the app or the cloud. + +## Approval on the box page + +On the home network an owner manages agents at `/api/agents`. These routes +are `local`: the passthrough never carries them, so a phone uses the messages +above and its approval key, and an agent can never reach them. + +| Route | Who | +|---|---| +| `GET /api/agents` | A client on the LAN. Rows, requests and keys | +| `GET /api/agents/audit?before=&n=` | A client on the LAN | +| `POST /api/agents {grant offer}` | The box itself, or a LAN client signed in with the house password | +| `POST /api/agents/{id}/widen` | The same | +| `POST /api/agents/requests/{reqId} {approve: true}` | The same | +| `POST /api/agents/requests/{reqId} {approve: false}` | A client on the LAN | +| `DELETE /api/agents/{id}` | A client on the LAN | + +Widening needs the house password because the LAN sign-in is otherwise +nothing at all. What the box has today: + +- **Off by default.** With `api.lan_auth` off, which is the default, every + client on the home network is an owner with no sign-in. Granting a remote + agent from there would let any device on the Wi-Fi give the outside world + a way in, so those routes refuse with 403 until the house password is on. +- **With the house password on.** The password has at least 10 characters + and is stored as argon2id (64 MiB, 3 passes). Five wrong guesses lock every + sign-in for 30 seconds, box-wide. A sign-in sets a random 32-byte cookie, + `HttpOnly` and `SameSite=Strict`, that lasts 12 hours and dies with a + restart. Browser requests from other sites are refused by Origin and + `Sec-Fetch-Site` checks. +- **What it lacks.** The page is plain HTTP, so anyone who can read the home + network's traffic can read the password and the cookie. There is one + shared password and no person behind it, so the audit row names the + address. Requests from the box itself (loopback) need no password, since + whoever can run code on the box already owns it. + +Narrowing stays open to any LAN client, as `DELETE /api/cloud/grant` does, +because removing access is safe. + +## The grant offer + +The MCP consent page shows a short code, a QR code and a universal link. All +three carry one offer, which the app shows the owner before Face ID. It is a +CBOR map, base64url without padding, in the link's fragment: + +| Field | Type | Meaning | +|---|---|---| +| `v` | uint | 1 | +| `home` | text | The home id | +| `key` | bstr, 32 | The agent's X25519 key, made by FTW Cloud's `keys` part | +| `role` | text | `agent`, `support` or `release` | +| `client` | text | The client's name, from its metadata document | +| `clientId` | text | The client id | +| `scopes`, `ops` | [text] | What the client asks for | +| `caps` | `{holdS, maxW, perMin}` | Proposed caps | +| `ttlS` | uint | Proposed length | +| `ticket` | text | The ticket id, for `support` | +| `code` | text | The code on the consent page, for the owner to compare | + +The owner may grant less than the offer asks. FTW Cloud learns the outcome +from the roster: the grant is whatever the roster lists for that key. + +## Push kinds + +- `agent.added` goes to every owner when an agent row is added, as + `cloud.granted` does: access from outside is news every owner should hear. +- `agent.request` goes to every owner when an agent asks for a durable change. + +Both travel as events. With the readable copy off, or without events in it, +FTW Cloud carries no events, so an owner learns of a request when the app +next opens. That gap is open. + +## The audit log + +The box writes a row for every call an agent makes and for every change to +an agent grant or an approval key, whoever makes it. Rows live in the box's +state store, at most 10,000 and at most 90 days. An owner reads them with +`audit.get` or on the box page. FTW Cloud keeps its own log of what it +forwarded; neither replaces the other. + +## Numbers in one place + +| What | Value | +|---|---| +| Longest grant | `agent` 30 days, `support` 14 days, `release` 90 days | +| Agent rows per box | 16 | +| `holdS` | 60 to 1,800 s | +| `maxW` | 1 to 100,000 W | +| `perMin` | 1 to 60, default 6 | +| Reads per agent | 60 a minute | +| Pending requests | 4 per agent, 16 per box | +| Request lifetime | 12 hours; kept 24 hours after it ends | +| `agent.request` args, `why` | 1 KiB, 280 bytes | +| Approval `atMs` window | 10 minutes either way | +| Signature replay memory | 20 minutes | +| `logs.get` | 200 lines, 32 KiB | +| `events.get` | 50 events | +| `audit.get` | 200 rows a page; 10,000 rows and 90 days kept | +| `by` on a support call | 64 bytes | diff --git a/docs/protocol-cloud.md b/docs/protocol-cloud.md index 5a3341d39..d77cedf37 100644 --- a/docs/protocol-cloud.md +++ b/docs/protocol-cloud.md @@ -16,7 +16,10 @@ specified in FTW Cloud reuses its frame layout, CBOR rules, field encoding and tile format. It adds the `cloud.link` capability and one optional field to the app protocol's `hello_ok`, `cloud` (see -[Session information](#session-information)), and changes nothing else. Lane 0 and the relay stay as they are. The Go types +[Session information](#session-information)), and changes nothing else. +Assistants, Sourceful support and the release check reach the box as agents +through the [tunnel](#tunnel); [Agents](agents.md) specifies their roles, +scopes, approval and messages. Lane 0 and the relay stay as they are. The Go types for both live in `go/protocol`, under Apache-2.0 ([#1588](https://github.com/srcfl/ftw/pull/1588)). @@ -438,10 +441,40 @@ The service never forwards these to a phone. |---|---|---| | `id` | text | The box's device id | | `key` | bstr, 32 B | The device's X25519 Noise static key | -| `role` | text | `owner`, `viewer` or `watch` | +| `role` | text | `owner`, `viewer` or `watch`; for an agent row `agent`, `support` or `release` | | `scopes` | [text] | Scopes the box derives from the role. For a watch, only those its phone's role also carries now. The service holds no role table | | `epoch` | uint | The device's epoch on the box | -| `tun` | bool | The device may open a session to the box through the service. True for a phone, false for a watch. It needs no grant | +| `tun` | bool | The device may open a session to the box through the service. True for a phone and a live agent row, false for a watch. It needs no grant | +| `agent` | map, optional | Only on an agent row: its grant, below. See [Agents](agents.md) | + +**Agent** + +| Field | Type | Meaning | +|---|---|---| +| `scopes` | [text] | The grant's scopes, within what its approving owner holds now | +| `ops` | [text] | The ops the grant allows | +| `caps` | map | `holdS`, `maxW` and `perMin`, below | +| `expiresAtMs` | int | Wall clock. The service stops admitting the row then by its own clock, without waiting for a roster | +| `principal` | map | `client`, `clientId` and `ticket`, below | + +The service must never admit an agent row through the relay, and may tighten +its caps but never loosen them. The box checks all of it again on every call. + +**Caps** + +| Field | Type | Meaning | +|---|---|---| +| `holdS` | uint | The longest hold, in seconds; 0 without `ftw.dispatch.hold` | +| `maxW` | uint | The largest power a hold may set, in W | +| `perMin` | uint | `cmd` and `agent.request` per rolling minute | + +**Principal** + +| Field | Type | Meaning | +|---|---|---| +| `client` | text | The client's name, from FTW Cloud's consent page | +| `clientId` | text | The client id | +| `ticket` | text | The support ticket, for `support` | **Grant** @@ -1128,15 +1161,19 @@ to the app. | `cloud.tun` | Capability: the box takes its app session through the service as `tun`. Absent means the phone uses the relay, even when it knows the home id | `registry.yaml`, `capabilities` | | `tunnel` | Carrier state, between `relay` and `cloud`: the box's own session, carried by the service | `registry.yaml`, `carrier_states` | | `cloud.granted`, `cloud.revoked` | Push kinds, sent to every owner when FTW Cloud is turned on or off | `push-catalogue.yaml` | +| `access.agents` | Capability: the box takes agents and answers the `agent.*` messages. See [Agents](agents.md) | `registry.yaml`, `capabilities` | +| `agent`, `support`, `release` | Roles for agent rows | `registry.yaml`, `roles` | +| `ftw.logs.read`, `ftw.config.read`, `ftw.diag.run`, `ftw.dispatch.hold`, `ftw.goals.request`, `ftw.update.request` | Agent scopes | `registry.yaml`, `scopes` | +| `agent` on each op | The scope that opens an op to an agent | `registry.yaml`, `ops` | +| `E_GRANT_EXPIRED`, `E_OP_NOT_GRANTED`, `E_CAP_EXCEEDED`, `E_RATE_LIMITED`, `E_NEEDS_OWNER`, `E_BAD_SIGNATURE`, `E_NO_APPROVAL_KEY`, `E_NOT_FOUND` | Agents' refusals | `registry.yaml`, `errors` | +| `agent.added`, `agent.request` | Push kinds, sent to every owner | `push-catalogue.yaml` | Class names, field names, close codes and the signing tags are not registry names. They live here and in `go/protocol`, held by golden vectors in both repositories. -Role names, `owner`, `viewer` and `watch`, are registry names, but -`go/protocol` does not generate them yet, so `srcfl/ftw-cloud` spells `owner` -by hand. Generating -the registry's roles would remove that copy. +Role names are registry names. `go/protocol` generates them as `Role*` +constants, so `srcfl/ftw-cloud` need not spell them by hand. ## Numbers in one place diff --git a/go/internal/apiauth/apiauth.go b/go/internal/apiauth/apiauth.go index 67f5fc886..ae10d350a 100644 --- a/go/internal/apiauth/apiauth.go +++ b/go/internal/apiauth/apiauth.go @@ -69,6 +69,13 @@ const ( KindLAN = "lan" ) +// AgentRole reports whether a role is an agent's: a grant an owner gave to an +// assistant, to Sourceful support or to the release check, never to a paired +// device. Pairing codes and role changes refuse these roles. +func AgentRole(role string) bool { + return role == RoleAgent || role == RoleSupport || role == RoleRelease +} + // Tier is how much a route costs before it runs. // // It comes from what the handler DOES, declared beside the handler, and never diff --git a/go/internal/apiauth/contract_gen.go b/go/internal/apiauth/contract_gen.go index 4eb336e0d..50c9fc966 100644 --- a/go/internal/apiauth/contract_gen.go +++ b/go/internal/apiauth/contract_gen.go @@ -6,8 +6,14 @@ package apiauth // what the registry exists to stop, and a role is the one name here // that decides whether a phone may change anything. const ( + // RoleAgent — Assistant. + RoleAgent = "agent" // RoleOwner — Owner. RoleOwner = "owner" + // RoleRelease — Release check. + RoleRelease = "release" + // RoleSupport — Sourceful support. + RoleSupport = "support" // RoleViewer — Viewer. RoleViewer = "viewer" // RoleWatch — Watch. @@ -18,6 +24,18 @@ const ( // A role is a projection over scopes and never a replacement for them, // so this is the only place the projection is written down. var RoleScopes = map[string][]string{ + RoleAgent: { + "ftw.live.read", + "ftw.history.read", + "ftw.plan.read", + "ftw.health.read", + "ftw.events.read", + "ftw.logs.read", + "ftw.config.read", + "ftw.diag.run", + "ftw.dispatch.hold", + "ftw.goals.request", + }, RoleOwner: { "ftw.live.read", "ftw.history.read", @@ -29,6 +47,27 @@ var RoleScopes = map[string][]string{ "ftw.mode.write", "ftw.members.read", "ftw.members.write", + "ftw.logs.read", + "ftw.config.read", + "ftw.diag.run", + "ftw.dispatch.hold", + "ftw.goals.request", + "ftw.update.request", + }, + RoleRelease: { + "ftw.health.read", + }, + RoleSupport: { + "ftw.live.read", + "ftw.history.read", + "ftw.plan.read", + "ftw.health.read", + "ftw.events.read", + "ftw.logs.read", + "ftw.config.read", + "ftw.diag.run", + "ftw.dispatch.hold", + "ftw.goals.request", }, RoleViewer: { "ftw.live.read", diff --git a/go/internal/appenroll/enroll.go b/go/internal/appenroll/enroll.go index 46d55ddb8..65d66068c 100644 --- a/go/internal/appenroll/enroll.go +++ b/go/internal/appenroll/enroll.go @@ -581,7 +581,8 @@ func knownRole(role string) error { } // phoneRole refuses a role a phone cannot hold: one the registry does not -// define, and watch, which only MintWatchCode hands out. +// define, watch, which only MintWatchCode hands out, and an agent's, which +// only an owner's signed grant hands out. func phoneRole(role string) error { if err := knownRole(role); err != nil { return err @@ -589,6 +590,9 @@ func phoneRole(role string) error { if role == apiauth.RoleWatch { return ErrWatchRole } + if apiauth.AgentRole(role) { + return fmt.Errorf("%w: %q is an agent's role", ErrUnknownRole, role) + } return nil } diff --git a/go/internal/appenroll/roles_test.go b/go/internal/appenroll/roles_test.go index d1342d08b..cfc6c2be7 100644 --- a/go/internal/appenroll/roles_test.go +++ b/go/internal/appenroll/roles_test.go @@ -148,6 +148,30 @@ func TestAnUnknownRoleIsRefusedEverywhere(t *testing.T) { } } +// An agent's role comes only from an owner's signed grant. A pairing code or +// a role change that named one would hand a phone an agent's reach without +// any of an agent's limits. +func TestAnAgentsRoleIsNeverAPhones(t *testing.T) { + id, _ := newIdentity(t) + owner := pair(t, id, apiauth.RoleOwner) + pair(t, id, apiauth.RoleOwner) + + for _, role := range []string{apiauth.RoleAgent, apiauth.RoleSupport, apiauth.RoleRelease} { + if _, _, err := id.MintPairingCode(role, PairingTTL); !errors.Is(err, ErrUnknownRole) { + t.Errorf("minting a code for %s: %v", role, err) + } + if _, _, err := id.MintSpokenCode(role); !errors.Is(err, ErrUnknownRole) { + t.Errorf("minting a box code for %s: %v", role, err) + } + if err := id.SetRole(owner.DeviceID, role); !errors.Is(err, ErrUnknownRole) { + t.Errorf("setting %s: %v", role, err) + } + } + if got := roleOf(t, id, owner.DeviceID); got != apiauth.RoleOwner { + t.Fatalf("the row is now %q", got) + } +} + // -------------------------------------------------------------------------- // Whoever creates a home owns it // -------------------------------------------------------------------------- diff --git a/go/internal/appproto/gencontract/gencontract.go b/go/internal/appproto/gencontract/gencontract.go index 924dce64b..a6b0eaafe 100644 --- a/go/internal/appproto/gencontract/gencontract.go +++ b/go/internal/appproto/gencontract/gencontract.go @@ -40,6 +40,9 @@ type Registry struct { Ops []struct { Name string `yaml:"name"` Scope string `yaml:"scope"` + // Agent is the scope that opens the op to an agent, empty when + // none does. + Agent string `yaml:"agent"` Desc string `yaml:"desc"` } `yaml:"ops"` Modes []struct { @@ -92,6 +95,7 @@ func Generate(raw []byte) ([]byte, error) { writeFields(&b, reg) writeCaps(&b, reg) writeScopes(&b, reg) + writeRoleNames(&b, reg) writeCloud(&b, reg) writeOps(&b, reg) writeErrors(&b, reg) @@ -222,8 +226,8 @@ func writeCaps(b *bytes.Buffer, reg Registry) { } func writeScopes(b *bytes.Buffer, reg Registry) { - b.WriteString("// Scopes are one object axis and two verb axes. Roles are a projection over\n") - b.WriteString("// these, never a replacement for them.\n") + b.WriteString("// Scopes are an object and a verb. Roles are a projection over these,\n") + b.WriteString("// never a replacement for them.\n") b.WriteString("const (\n") for _, s := range reg.Scopes { fmt.Fprintf(b, "\t// Scope%s — %s.\n", goName(strings.TrimPrefix(s.Name, "ftw.")), s.Desc) @@ -231,13 +235,16 @@ func writeScopes(b *bytes.Buffer, reg Registry) { } b.WriteString(")\n\n") - // The registry's own shape: one object axis and two verb axes. The suffix - // is the contract, so the write set is derived rather than listed — a - // hand-kept list is one a new scope gets left out of. - b.WriteString("// WriteScopes is every scope that changes something.\n") + // The registry's own shape: an object and a verb. The verb is the + // contract, so the write set is derived rather than listed — a hand-kept + // list is one a new scope gets left out of. A hold changes something + // now and a request once an owner confirms it; read and run change + // nothing. + b.WriteString("// WriteScopes is every scope that changes something, now or once an\n") + b.WriteString("// owner confirms it.\n") b.WriteString("var WriteScopes = []string{\n") for _, s := range reg.Scopes { - if !strings.HasSuffix(s.Name, ".write") { + if !changes(s.Name) { continue } fmt.Fprintf(b, "\tScope%s,\n", goName(strings.TrimPrefix(s.Name, "ftw."))) @@ -245,6 +252,34 @@ func writeScopes(b *bytes.Buffer, reg Registry) { b.WriteString("}\n\n") } +// changes reports whether a scope's verb changes something. +func changes(scope string) bool { + for _, verb := range []string{".write", ".hold", ".request"} { + if strings.HasSuffix(scope, verb) { + return true + } + } + return false +} + +// writeRoleNames emits the role names into package protocol as well, for FTW +// Cloud, which reads a roster's roles and cannot import apiauth. The role +// table itself stays in apiauth; this is only the words. +func writeRoleNames(b *bytes.Buffer, reg Registry) { + names := make([]string, 0, len(reg.Roles)) + for name := range reg.Roles { + names = append(names, name) + } + sort.Strings(names) + b.WriteString("// Roles, as the registry names them. apiauth holds what each carries.\n") + b.WriteString("const (\n") + for _, name := range names { + fmt.Fprintf(b, "\t// Role%s — %s.\n", goName(name), reg.Roles[name].Label) + fmt.Fprintf(b, "\tRole%s = %q\n", goName(name), name) + } + b.WriteString(")\n\n") +} + // writeCloud emits what an FTW Cloud grant may name. The scopes are listed // by their constants, so a cloud scope the registry does not declare as a // scope fails to compile rather than being shared under a misspelled name. @@ -286,6 +321,19 @@ func writeOps(b *bytes.Buffer, reg Registry) { fmt.Fprintf(b, "\t%q: %q,\n", o.Name, o.Scope) } b.WriteString("}\n\n") + + b.WriteString("// RegistryAgentOps maps each op an agent may name to the scope that opens\n") + b.WriteString("// it. ftw.dispatch.hold runs as a cmd within the grant's caps;\n") + b.WriteString("// ftw.goals.request waits as an agent.request for an owner. An op not\n") + b.WriteString("// listed is never open to an agent.\n") + b.WriteString("var RegistryAgentOps = map[string]string{\n") + for _, o := range reg.Ops { + if o.Agent == "" { + continue + } + fmt.Fprintf(b, "\t%q: %q,\n", o.Name, o.Agent) + } + b.WriteString("}\n\n") } // writeRoles emits the role table with '*' expanded. diff --git a/go/protocol/agents.go b/go/protocol/agents.go new file mode 100644 index 000000000..2b062ea7d --- /dev/null +++ b/go/protocol/agents.go @@ -0,0 +1,371 @@ +package protocol + +import ( + "crypto/ecdsa" + "crypto/elliptic" + "crypto/sha256" + "errors" + "fmt" + "math/big" + "slices" +) + +// Agents: grants an owner gives to an assistant, to Sourceful support for one +// ticket, or to the release check. docs/agents.md is the normative text; this +// file holds the shapes and the approval signature's bytes, so FTW Cloud and +// the phone build them from the same code the box checks them with. + +// Agent message types. Each request gets MsgAgentOK or MsgError with its id. +const ( + MsgApprovalKeySet = "approval.key.set" + MsgAgentAdd = "agent.add" + MsgAgentWiden = "agent.widen" + MsgAgentRevoke = "agent.revoke" + MsgAgentList = "agent.list" + MsgAgentRequest = "agent.request" + MsgAgentConfirm = "agent.confirm" + MsgAgentOK = "agent.ok" + MsgAuditGet = "audit.get" + + MsgHealthGet = "health.get" + MsgHealth = "health" + MsgEventsGet = "events.get" + MsgEvents = "events" + MsgLogsGet = "logs.get" + MsgLogs = "logs" + MsgConfigGet = "config.get" + MsgConfig = "config" + MsgDiagRun = "diag.run" + MsgDiag = "diag" +) + +// TerminateExpired ends an agent's session when its grant runs out. +const TerminateExpired = "expired" + +// Request states. +const ( + RequestPending = "pending" + RequestApproved = "approved" + RequestDeclined = "declined" + RequestExpired = "expired" +) + +// Limits the box enforces on every grant, whatever the grant says. +const ( + // AgentMaxMs, SupportMaxMs and ReleaseMaxMs are the longest grants. + AgentMaxMs int64 = 30 * 24 * 60 * 60 * 1000 + SupportMaxMs int64 = 14 * 24 * 60 * 60 * 1000 + ReleaseMaxMs int64 = 90 * 24 * 60 * 60 * 1000 + + // AgentRowsMax is how many agent rows one box holds. + AgentRowsMax = 16 + + HoldSMin = 60 + HoldSMax = 1800 + MaxWMin = 1 + MaxWMax = 100_000 + PerMinMin = 1 + PerMinMax = 60 + // PerMinDefault is the rate a grant that names none gets. + PerMinDefault = 6 + // ReadsPerMin is the box's own limit on an agent's reads. + ReadsPerMin = 60 + + // PendingPerAgent and PendingPerBox bound the requests waiting for an + // owner. A request lives RequestTTLMs and is kept RequestKeptMs after + // it ends, so the agent can read how it ended. + PendingPerAgent = 4 + PendingPerBox = 16 + RequestTTLMs int64 = 12 * 60 * 60 * 1000 + RequestKeptMs int64 = 24 * 60 * 60 * 1000 + RequestArgsMax = 1024 + RequestWhyMax = 280 + + // ApprovalSkewMs is how far an approval's atMs may stray from the box's + // wall clock, and ApprovalReplayMs how long the box remembers one it took. + ApprovalSkewMs int64 = 10 * 60 * 1000 + ApprovalReplayMs int64 = 20 * 60 * 1000 + + LogsLinesMax = 200 + LogsBytesMax = 32 * 1024 + EventsMax = 50 + AuditPageMax = 200 + AuditRowsKept = 10_000 + AuditDaysKept = 90 + // ByMax bounds the staff id a support call carries. + ByMax = 64 + // PrincipalFieldMax bounds each principal field. + PrincipalFieldMax = 256 +) + +// Caps bound what one grant may do. +type Caps struct { + // HoldS is the longest hold, in seconds. + HoldS uint64 `cbor:"holdS"` + // MaxW is the largest power a hold may set, in W. + MaxW uint64 `cbor:"maxW"` + // PerMin is cmd and agent.request per rolling minute. + PerMin uint64 `cbor:"perMin"` +} + +// Principal says who an agent row is for. Display and audit only: the role +// decides what it may do. +type Principal struct { + Client string `cbor:"client"` + ClientID string `cbor:"clientId"` + Ticket string `cbor:"ticket"` +} + +// AgentRow is one agent grant as the box holds it. +type AgentRow struct { + ID string `cbor:"id"` + Key []byte `cbor:"key"` + Role string `cbor:"role"` + Scopes []string `cbor:"scopes"` + Ops []string `cbor:"ops"` + Caps Caps `cbor:"caps"` + ExpiresAtMs int64 `cbor:"expiresAtMs"` + Principal Principal `cbor:"principal"` + ApprovedBy string `cbor:"approvedBy"` + AddedAtMs int64 `cbor:"addedAtMs"` + LastSeenMs int64 `cbor:"lastSeenMs"` + Epoch uint64 `cbor:"epoch"` +} + +// ApprovalKeySet registers an owner phone's approval key. +type ApprovalKeySet struct { + Pub []byte `cbor:"pub"` + AtMs int64 `cbor:"atMs"` + Sig []byte `cbor:"sig"` +} + +// AgentAdd grants access. +type AgentAdd struct { + Key []byte `cbor:"key"` + Role string `cbor:"role"` + Scopes []string `cbor:"scopes"` + Ops []string `cbor:"ops"` + Caps Caps `cbor:"caps"` + ExpiresAtMs int64 `cbor:"expiresAtMs"` + Principal Principal `cbor:"principal"` + AtMs int64 `cbor:"atMs"` + Sig []byte `cbor:"sig"` +} + +// AgentWiden replaces a grant's rights. Any change but a revoke is signed. +type AgentWiden struct { + ID string `cbor:"id"` + Epoch uint64 `cbor:"epoch"` + Scopes []string `cbor:"scopes"` + Ops []string `cbor:"ops"` + Caps Caps `cbor:"caps"` + ExpiresAtMs int64 `cbor:"expiresAtMs"` + AtMs int64 `cbor:"atMs"` + Sig []byte `cbor:"sig"` +} + +// AgentRevoke removes a grant. No signature. +type AgentRevoke struct { + ID string `cbor:"id"` +} + +// AgentRequest is an agent asking for a durable change. +type AgentRequest struct { + Op string `cbor:"op"` + Args map[string]any `cbor:"args"` + Why string `cbor:"why"` +} + +// AgentConfirm answers a request. Approving is signed; declining is not. +type AgentConfirm struct { + ReqID string `cbor:"reqId"` + Approve bool `cbor:"approve"` + AtMs int64 `cbor:"atMs,omitempty"` + Sig []byte `cbor:"sig,omitempty"` +} + +// Request is one durable change an agent asked for. +type Request struct { + ReqID string `cbor:"reqId"` + Agent string `cbor:"agent"` + Op string `cbor:"op"` + Args map[string]any `cbor:"args"` + Why string `cbor:"why"` + AtMs int64 `cbor:"atMs"` + ExpiresAtMs int64 `cbor:"expiresAtMs"` + State string `cbor:"state"` +} + +// ApprovalKeyInfo is one owner phone's registered approval key. +type ApprovalKeyInfo struct { + DeviceID string `cbor:"deviceId"` + SetAtMs int64 `cbor:"setAtMs"` +} + +// AgentList is agent.ok's body for agent.list. An agent sees its own row. +type AgentList struct { + Agents []AgentRow `cbor:"agents"` + Requests []Request `cbor:"requests"` + Keys []ApprovalKeyInfo `cbor:"keys"` +} + +// AuditGet pages through the audit log, newest first. +type AuditGet struct { + BeforeSeq uint64 `cbor:"beforeSeq,omitempty"` + N uint64 `cbor:"n,omitempty"` +} + +// AuditRow is one line of the box's audit log. +type AuditRow struct { + Seq uint64 `cbor:"seq"` + AtMs int64 `cbor:"atMs"` + Actor string `cbor:"actor"` + Role string `cbor:"role"` + Principal string `cbor:"principal"` + By string `cbor:"by"` + What string `cbor:"what"` + Target string `cbor:"target"` + Result string `cbor:"result"` +} + +// AuditPage is agent.ok's body for audit.get. +type AuditPage struct { + Rows []AuditRow `cbor:"rows"` + More bool `cbor:"more"` +} + +// LogsGet asks for a redacted log excerpt. +type LogsGet struct { + N uint64 `cbor:"n,omitempty"` + Level string `cbor:"level,omitempty"` +} + +// LogLine is one redacted line. Src is an opaque source id for a driver's +// line, empty for the box's own. +type LogLine struct { + Ts int64 `cbor:"ts"` + Level string `cbor:"level"` + Src string `cbor:"src,omitempty"` + Msg string `cbor:"msg"` +} + +// Logs is the answer to logs.get. Dropped counts lines left out to stay +// within the limits. +type Logs struct { + Lines []LogLine `cbor:"lines"` + Dropped uint64 `cbor:"dropped"` +} + +// -------------------------------------------------------------------------- +// The approval signature +// -------------------------------------------------------------------------- + +// ApprovalTag starts every signed array, so a signature for anything else is +// never one of these. +const ApprovalTag = "ftw.approval.v1" + +// ApprovalSigBytes is r ‖ s, 32 bytes each. +const ApprovalSigBytes = 64 + +// ApprovalPubBytes is a SEC1 uncompressed P-256 point. +const ApprovalPubBytes = 65 + +// Errors from checking a signed body's shape. A signature that does not +// verify is ErrApprovalSignature. +var ( + ErrApprovalUnsorted = errors.New("protocol: a signed list must be sorted with no repeats") + ErrApprovalPub = errors.New("protocol: approval key is not an uncompressed P-256 point") + ErrApprovalSignature = errors.New("protocol: approval signature does not verify") +) + +// SignedFor names the box and the phone an approval belongs to. +type SignedFor struct { + // BoxKey is the box's X25519 static key, as in the pairing QR code. + BoxKey []byte + // DeviceID is the signing phone's device id. + DeviceID string +} + +// ApprovalBytes is the deterministic CBOR array a phone signs: the tag, what +// it approves, the box, the phone, its clock, then the fields. +func ApprovalBytes(what string, f SignedFor, atMs int64, fields ...any) ([]byte, error) { + for _, v := range fields { + if list, ok := v.([]string); ok && !sortedUnique(list) { + return nil, ErrApprovalUnsorted + } + } + arr := append([]any{ApprovalTag, what, f.BoxKey, f.DeviceID, atMs}, fields...) + b, err := encMode.Marshal(arr) + if err != nil { + return nil, fmt.Errorf("protocol: encode approval: %w", err) + } + return b, nil +} + +func capsArray(c Caps) []uint64 { return []uint64{c.HoldS, c.MaxW, c.PerMin} } + +func emptyIfNil(list []string) []string { + if list == nil { + return []string{} + } + return list +} + +// KeySetBytes is what approval.key.set signs: the key itself, as proof the +// phone holds its private half. +func KeySetBytes(f SignedFor, m ApprovalKeySet) ([]byte, error) { + return ApprovalBytes(MsgApprovalKeySet, f, m.AtMs, m.Pub) +} + +// AddBytes is what agent.add signs. +func AddBytes(f SignedFor, m AgentAdd) ([]byte, error) { + return ApprovalBytes(MsgAgentAdd, f, m.AtMs, m.Key, m.Role, emptyIfNil(m.Scopes), emptyIfNil(m.Ops), + capsArray(m.Caps), m.ExpiresAtMs, m.Principal.Client, m.Principal.ClientID, m.Principal.Ticket) +} + +// WidenBytes is what agent.widen signs. +func WidenBytes(f SignedFor, m AgentWiden) ([]byte, error) { + return ApprovalBytes(MsgAgentWiden, f, m.AtMs, m.ID, m.Epoch, emptyIfNil(m.Scopes), emptyIfNil(m.Ops), + capsArray(m.Caps), m.ExpiresAtMs) +} + +// ConfirmBytes is what agent.confirm signs to approve. +func ConfirmBytes(f SignedFor, m AgentConfirm) ([]byte, error) { + return ApprovalBytes(MsgAgentConfirm, f, m.AtMs, m.ReqID) +} + +// ParseApprovalKey reads a SEC1 uncompressed P-256 public key. +func ParseApprovalKey(pub []byte) (*ecdsa.PublicKey, error) { + if len(pub) != ApprovalPubBytes || pub[0] != 4 { + return nil, ErrApprovalPub + } + x := new(big.Int).SetBytes(pub[1:33]) + y := new(big.Int).SetBytes(pub[33:]) + curve := elliptic.P256() + if !curve.IsOnCurve(x, y) { + return nil, ErrApprovalPub + } + return &ecdsa.PublicKey{Curve: curve, X: x, Y: y}, nil +} + +// VerifyApproval checks sig, r ‖ s, over SHA-256 of msg. +func VerifyApproval(pub []byte, msg, sig []byte) error { + key, err := ParseApprovalKey(pub) + if err != nil { + return err + } + if len(sig) != ApprovalSigBytes { + return ErrApprovalSignature + } + digest := sha256.Sum256(msg) + r := new(big.Int).SetBytes(sig[:32]) + s := new(big.Int).SetBytes(sig[32:]) + if !ecdsa.Verify(key, digest[:], r, s) { + return ErrApprovalSignature + } + return nil +} + +func sortedUnique(list []string) bool { + return slices.IsSorted(list) && len(slices.Compact(slices.Clone(list))) == len(list) +} diff --git a/go/protocol/agents_test.go b/go/protocol/agents_test.go new file mode 100644 index 000000000..2d68327f9 --- /dev/null +++ b/go/protocol/agents_test.go @@ -0,0 +1,343 @@ +package protocol + +import ( + "bytes" + "crypto/ecdsa" + "crypto/elliptic" + "crypto/rand" + "crypto/sha256" + "encoding/hex" + "encoding/json" + "errors" + "math/big" + "os" + "path/filepath" + "testing" +) + +// The approval vectors are what the phone and FTW Cloud replay: for each +// signed message, its body as it travels, the exact bytes the phone signs +// and a signature by the vector key. Regenerate with +// FTW_WRITE_VECTORS=1 go test ./protocol -run TestApprovalVectors; the +// bytes must not change for an existing case. + +type approvalVectors struct { + Note string `json:"note"` + PubHex string `json:"pubHex"` + BoxKey string `json:"boxKeyHex"` + DeviceID string `json:"deviceId"` + Cases []approvalVector `json:"cases"` +} + +type approvalVector struct { + What string `json:"what"` + BodyHex string `json:"bodyHex"` + SignedHex string `json:"signedHex"` + SHA256Hex string `json:"sha256Hex"` + SigHex string `json:"sigHex"` +} + +const approvalVectorsPath = "testdata/approval-vectors.json" + +// vectorKey is a fixed P-256 key, so the public half in the file never +// changes. It signs nothing outside these tests. +func vectorKey() *ecdsa.PrivateKey { + d, _ := new(big.Int).SetString("6b2c7e1f0a9d3c4b5e8f7a6d1c2b3e4f5a6b7c8d9e0f1a2b3c4d5e6f7a8b9c0d", 16) + key := &ecdsa.PrivateKey{D: d} + key.Curve = elliptic.P256() + key.X, key.Y = key.Curve.ScalarBaseMult(d.Bytes()) + return key +} + +func vectorPub(key *ecdsa.PrivateKey) []byte { + return elliptic.Marshal(elliptic.P256(), key.X, key.Y) //nolint:staticcheck // SEC1 uncompressed is the wire form. +} + +func signRaw(t *testing.T, key *ecdsa.PrivateKey, msg []byte) []byte { + t.Helper() + digest := sha256.Sum256(msg) + r, s, err := ecdsa.Sign(rand.Reader, key, digest[:]) + if err != nil { + t.Fatal(err) + } + out := make([]byte, ApprovalSigBytes) + r.FillBytes(out[:32]) + s.FillBytes(out[32:]) + return out +} + +func vectorFor() SignedFor { + box := make([]byte, 32) + for i := range box { + box[i] = byte(i + 1) + } + return SignedFor{BoxKey: box, DeviceID: "ownerPh1"} +} + +func vectorAgentKey() []byte { + key := make([]byte, 32) + for i := range key { + key[i] = byte(0xa0 + i) + } + return key +} + +// vectorMessages builds every signed message, each with its signing bytes. +func vectorMessages(t *testing.T, key *ecdsa.PrivateKey) []struct { + what string + body any + sign func(sig []byte) any + raw []byte +} { + t.Helper() + f := vectorFor() + const atMs = 1_792_000_000_000 + + keySet := ApprovalKeySet{Pub: vectorPub(key), AtMs: atMs} + add := AgentAdd{ + Key: vectorAgentKey(), Role: RoleAgent, + Scopes: []string{ScopeDispatchHold, ScopeLiveRead, ScopePlanRead}, + Ops: []string{OpLoadpointHold}, + Caps: Caps{HoldS: 900, MaxW: 11_000, PerMin: 6}, + ExpiresAtMs: atMs + AgentMaxMs, + Principal: Principal{Client: "Claude", ClientID: "https://claude.ai/oauth/mcp-client-metadata"}, + AtMs: atMs, + } + support := AgentAdd{ + Key: vectorAgentKey(), Role: RoleSupport, + Scopes: []string{ScopeHealthRead, ScopeLogsRead}, + ExpiresAtMs: atMs + SupportMaxMs, + Principal: Principal{Client: "Sourceful support", Ticket: "FTW-123"}, + AtMs: atMs, + } + widen := AgentWiden{ + ID: "oKGio6Sl", Epoch: 2, + Scopes: []string{ScopeLiveRead, ScopePlanRead}, + Caps: Caps{PerMin: 6}, + ExpiresAtMs: atMs + AgentMaxMs, AtMs: atMs, + } + confirm := AgentConfirm{ReqID: "r-2f1e0d", Approve: true, AtMs: atMs} + + keySetRaw, err := KeySetBytes(f, keySet) + if err != nil { + t.Fatal(err) + } + addRaw, err := AddBytes(f, add) + if err != nil { + t.Fatal(err) + } + supportRaw, err := AddBytes(f, support) + if err != nil { + t.Fatal(err) + } + widenRaw, err := WidenBytes(f, widen) + if err != nil { + t.Fatal(err) + } + confirmRaw, err := ConfirmBytes(f, confirm) + if err != nil { + t.Fatal(err) + } + type msg = struct { + what string + body any + sign func(sig []byte) any + raw []byte + } + return []msg{ + {MsgApprovalKeySet, keySet, func(sig []byte) any { m := keySet; m.Sig = sig; return m }, keySetRaw}, + {MsgAgentAdd, add, func(sig []byte) any { m := add; m.Sig = sig; return m }, addRaw}, + {MsgAgentAdd, support, func(sig []byte) any { m := support; m.Sig = sig; return m }, supportRaw}, + {MsgAgentWiden, widen, func(sig []byte) any { m := widen; m.Sig = sig; return m }, widenRaw}, + {MsgAgentConfirm, confirm, func(sig []byte) any { m := confirm; m.Sig = sig; return m }, confirmRaw}, + } +} + +func TestApprovalVectors(t *testing.T) { + key := vectorKey() + msgs := vectorMessages(t, key) + + if os.Getenv("FTW_WRITE_VECTORS") != "" { + f := vectorFor() + out := approvalVectors{ + Note: "docs/agents.md, The approval signature. signedHex is what the phone signs; " + + "sigHex is ECDSA P-256 over SHA-256 of it, r||s.", + PubHex: hex.EncodeToString(vectorPub(key)), BoxKey: hex.EncodeToString(f.BoxKey), DeviceID: f.DeviceID, + } + for _, m := range msgs { + sig := signRaw(t, key, m.raw) + body, err := Marshal(m.sign(sig)) + if err != nil { + t.Fatal(err) + } + sum := sha256.Sum256(m.raw) + out.Cases = append(out.Cases, approvalVector{ + What: m.what, BodyHex: hex.EncodeToString(body), SignedHex: hex.EncodeToString(m.raw), + SHA256Hex: hex.EncodeToString(sum[:]), SigHex: hex.EncodeToString(sig), + }) + } + raw, err := json.MarshalIndent(out, "", " ") + if err != nil { + t.Fatal(err) + } + if err := os.WriteFile(filepath.FromSlash(approvalVectorsPath), append(raw, '\n'), 0o644); err != nil { + t.Fatal(err) + } + } + + raw, err := os.ReadFile(filepath.FromSlash(approvalVectorsPath)) + if err != nil { + t.Fatal(err) + } + var vec approvalVectors + if err := json.Unmarshal(raw, &vec); err != nil { + t.Fatal(err) + } + if vec.PubHex != hex.EncodeToString(vectorPub(key)) { + t.Fatal("the vector key changed") + } + if len(vec.Cases) != len(msgs) { + t.Fatalf("%d cases, want %d", len(vec.Cases), len(msgs)) + } + pub := vectorPub(key) + f := SignedFor{DeviceID: vec.DeviceID} + f.BoxKey, _ = hex.DecodeString(vec.BoxKey) + for i, c := range vec.Cases { + if c.What != msgs[i].what { + t.Fatalf("case %d is %s, want %s", i, c.What, msgs[i].what) + } + if got := hex.EncodeToString(msgs[i].raw); got != c.SignedHex { + t.Errorf("case %d (%s): signed bytes changed\n got %s\nwant %s", i, c.What, got, c.SignedHex) + } + // Rebuild the signed bytes from the body as it travels, which is + // what the box does. + body, _ := hex.DecodeString(c.BodyHex) + signed, sig := rebuild(t, c.What, f, body) + if hex.EncodeToString(signed) != c.SignedHex { + t.Errorf("case %d (%s): the body does not rebuild the signed bytes", i, c.What) + } + if hex.EncodeToString(sig) != c.SigHex { + t.Errorf("case %d (%s): the body carries another signature", i, c.What) + } + if err := VerifyApproval(pub, signed, sig); err != nil { + t.Errorf("case %d (%s): %v", i, c.What, err) + } + sum := sha256.Sum256(signed) + if hex.EncodeToString(sum[:]) != c.SHA256Hex { + t.Errorf("case %d (%s): digest", i, c.What) + } + } +} + +func rebuild(t *testing.T, what string, f SignedFor, body []byte) ([]byte, []byte) { + t.Helper() + var signed []byte + var sig []byte + var err error + switch what { + case MsgApprovalKeySet: + var m ApprovalKeySet + if err = Unmarshal(body, &m); err == nil { + signed, err = KeySetBytes(f, m) + sig = m.Sig + } + case MsgAgentAdd: + var m AgentAdd + if err = Unmarshal(body, &m); err == nil { + signed, err = AddBytes(f, m) + sig = m.Sig + } + case MsgAgentWiden: + var m AgentWiden + if err = Unmarshal(body, &m); err == nil { + signed, err = WidenBytes(f, m) + sig = m.Sig + } + case MsgAgentConfirm: + var m AgentConfirm + if err = Unmarshal(body, &m); err == nil { + signed, err = ConfirmBytes(f, m) + sig = m.Sig + } + default: + t.Fatalf("no rebuild for %s", what) + } + if err != nil { + t.Fatal(err) + } + return signed, sig +} + +func TestApprovalRefusesWhatItDidNotSign(t *testing.T) { + key := vectorKey() + pub := vectorPub(key) + f := vectorFor() + add := AgentAdd{Key: vectorAgentKey(), Role: RoleAgent, Scopes: []string{ScopeLiveRead}, + ExpiresAtMs: 2_000, AtMs: 1_000} + raw, err := AddBytes(f, add) + if err != nil { + t.Fatal(err) + } + sig := signRaw(t, key, raw) + if err := VerifyApproval(pub, raw, sig); err != nil { + t.Fatal(err) + } + + wider := add + wider.Scopes = []string{ScopeDispatchHold, ScopeLiveRead} + widerRaw, _ := AddBytes(f, wider) + if !errors.Is(VerifyApproval(pub, widerRaw, sig), ErrApprovalSignature) { + t.Error("a signature over read access passed for control") + } + + other := f + other.BoxKey = bytes.Repeat([]byte{9}, 32) + otherRaw, _ := AddBytes(other, add) + if !errors.Is(VerifyApproval(pub, otherRaw, sig), ErrApprovalSignature) { + t.Error("a signature for one box passed at another") + } + + if !errors.Is(VerifyApproval(pub, raw, sig[:63]), ErrApprovalSignature) { + t.Error("a short signature passed") + } + if !errors.Is(VerifyApproval(pub[:64], raw, sig), ErrApprovalPub) { + t.Error("a short key passed") + } + bad := append([]byte(nil), pub...) + bad[64] ^= 1 + if !errors.Is(VerifyApproval(bad, raw, sig), ErrApprovalPub) { + t.Error("a point off the curve passed") + } +} + +func TestApprovalBytesRefuseAnUnsortedList(t *testing.T) { + f := vectorFor() + for _, scopes := range [][]string{ + {ScopePlanRead, ScopeLiveRead}, + {ScopeLiveRead, ScopeLiveRead}, + } { + _, err := AddBytes(f, AgentAdd{Key: vectorAgentKey(), Role: RoleAgent, Scopes: scopes}) + if !errors.Is(err, ErrApprovalUnsorted) { + t.Errorf("%v: %v", scopes, err) + } + } +} + +func TestEnvelopeCarriesByOnlyWhenSet(t *testing.T) { + id := uint32(7) + plain, err := EncodeEnvelope(Envelope{T: MsgPlanGet, ID: &id}) + if err != nil { + t.Fatal(err) + } + if bytes.Contains(plain, []byte("by")) { + t.Error("an envelope without a staff id names one") + } + withBy, err := EncodeEnvelope(Envelope{T: MsgPlanGet, ID: &id, By: "staff-42"}) + if err != nil { + t.Fatal(err) + } + got, err := DecodeEnvelope(withBy) + if err != nil || got.By != "staff-42" { + t.Fatalf("by did not survive: %+v %v", got, err) + } +} diff --git a/go/protocol/cloudwire/allowlist.go b/go/protocol/cloudwire/allowlist.go index a0e79a0ba..ffc97e5e3 100644 --- a/go/protocol/cloudwire/allowlist.go +++ b/go/protocol/cloudwire/allowlist.go @@ -34,9 +34,14 @@ var Fields = map[string][]string{ MsgEvent: {"eventId", "ts", "kind", "severity", "args", "src", "lp"}, MsgRoster: {"rosterSeq", "ttlS", "devices", "grant", "pending"}, - "Device": {"id", "key", "role", "scopes", "epoch", "tun"}, - "Grant": {"id", "scopes", "purposes", "controller"}, - "Pending": {"hash", "ttlS"}, + "Device": {"id", "key", "role", "scopes", "epoch", "tun", "agent"}, + // An agent row's grant (docs/agents.md). The client's name and the + // ticket came from FTW Cloud's own consent page and support system. + "Agent": {"scopes", "ops", "caps", "expiresAtMs", "principal"}, + "Caps": {"holdS", "maxW", "perMin"}, + "Principal": {"client", "clientId", "ticket"}, + "Grant": {"id", "scopes", "purposes", "controller"}, + "Pending": {"hash", "ttlS"}, MsgBye: {"why", "purge"}, diff --git a/go/protocol/cloudwire/messages.go b/go/protocol/cloudwire/messages.go index ba4b7512b..02d007d6c 100644 --- a/go/protocol/cloudwire/messages.go +++ b/go/protocol/cloudwire/messages.go @@ -289,6 +289,21 @@ type Device struct { // Tun says the device may open a session to the box through the // service. It needs no grant: the readable copy is a purpose on top. Tun bool `cbor:"tun"` + // Agent is set on an agent row: an assistant, Sourceful support or the + // release check (docs/agents.md). Absent on a phone or a watch. + Agent *Agent `cbor:"agent,omitempty"` +} + +// Agent is an agent row's grant, as the box enforces it. The service must +// stop admitting the row at ExpiresAtMs by its own clock, never admit it +// through the relay, and may tighten the caps but never loosen them. +type Agent struct { + // Scopes and Ops are the grant at the approving owner's scopes now. + Scopes []string `cbor:"scopes"` + Ops []string `cbor:"ops"` + Caps protocol.Caps `cbor:"caps"` + ExpiresAtMs int64 `cbor:"expiresAtMs"` + Principal protocol.Principal `cbor:"principal"` } // Pending is one pairing code on the box's screen, by its PairingHash. diff --git a/go/protocol/contract_gen.go b/go/protocol/contract_gen.go index 0dc9e9ef9..d668814bb 100644 --- a/go/protocol/contract_gen.go +++ b/go/protocol/contract_gen.go @@ -127,6 +127,7 @@ const ( CapCloudLink = "cloud.link" CapCloudTun = "cloud.tun" CapCmdExchange = "cmd.exchange" + CapAccessAgents = "access.agents" ) // AllCapabilities is every capability name the registry defines. @@ -150,10 +151,11 @@ var AllCapabilities = []string{ CapCloudLink, CapCloudTun, CapCmdExchange, + CapAccessAgents, } -// Scopes are one object axis and two verb axes. Roles are a projection over -// these, never a replacement for them. +// Scopes are an object and a verb. Roles are a projection over these, +// never a replacement for them. const ( // ScopeLiveRead — Current readings and freshness. ScopeLiveRead = "ftw.live.read" @@ -175,15 +177,47 @@ const ( ScopeMembersRead = "ftw.members.read" // ScopeMembersWrite — Invite and revoke. ScopeMembersWrite = "ftw.members.write" + // ScopeLogsRead — Log excerpts the box redacts. + ScopeLogsRead = "ftw.logs.read" + // ScopeConfigRead — Configuration the box redacts. + ScopeConfigRead = "ftw.config.read" + // ScopeDiagRun — Checks that change nothing. + ScopeDiagRun = "ftw.diag.run" + // ScopeDispatchHold — Hold energy assets for a capped time. + ScopeDispatchHold = "ftw.dispatch.hold" + // ScopeGoalsRequest — Ask an owner to change a durable goal. + ScopeGoalsRequest = "ftw.goals.request" + // ScopeUpdateRequest — Ask an owner to install a version. + ScopeUpdateRequest = "ftw.update.request" ) -// WriteScopes is every scope that changes something. +// WriteScopes is every scope that changes something, now or once an +// owner confirms it. var WriteScopes = []string{ ScopeDispatchWrite, ScopeModeWrite, ScopeMembersWrite, + ScopeDispatchHold, + ScopeGoalsRequest, + ScopeUpdateRequest, } +// Roles, as the registry names them. apiauth holds what each carries. +const ( + // RoleAgent — Assistant. + RoleAgent = "agent" + // RoleOwner — Owner. + RoleOwner = "owner" + // RoleRelease — Release check. + RoleRelease = "release" + // RoleSupport — Sourceful support. + RoleSupport = "support" + // RoleViewer — Viewer. + RoleViewer = "viewer" + // RoleWatch — Watch. + RoleWatch = "watch" +) + // CloudScopes are the scopes an FTW Cloud grant may name. var CloudScopes = []string{ ScopeLiveRead, @@ -226,6 +260,20 @@ var RegistryOps = map[string]string{ "loadpoint.surplus_only.set": "ftw.dispatch.write", } +// RegistryAgentOps maps each op an agent may name to the scope that opens +// it. ftw.dispatch.hold runs as a cmd within the grant's caps; +// ftw.goals.request waits as an agent.request for an owner. An op not +// listed is never open to an agent. +var RegistryAgentOps = map[string]string{ + "site.mode.set": "ftw.goals.request", + "planner.prefs.set": "ftw.goals.request", + "battery.hold": "ftw.dispatch.hold", + "loadpoint.hold": "ftw.dispatch.hold", + "loadpoint.boost": "ftw.dispatch.hold", + "loadpoint.soc.set": "ftw.goals.request", + "loadpoint.surplus_only.set": "ftw.goals.request", +} + // Error codes. The box sends the code and machine-readable args; the app // owns every word of prose, in every language it ships. const ( @@ -259,6 +307,22 @@ const ( ErrWholeDocument = "E_WHOLE_DOCUMENT" // ErrLocalOnly — Route is served only on the box's own page. ErrLocalOnly = "E_LOCAL_ONLY" + // ErrGrantExpired — Access ran out at its expiry. + ErrGrantExpired = "E_GRANT_EXPIRED" + // ErrOpNotGranted — The grant does not list this operation. + ErrOpNotGranted = "E_OP_NOT_GRANTED" + // ErrCapExceeded — An argument or a count is past its cap. + ErrCapExceeded = "E_CAP_EXCEEDED" + // ErrRateLimited — Too many commands for the grant's rate. + ErrRateLimited = "E_RATE_LIMITED" + // ErrNeedsOwner — A durable change waits for an owner as agent.request. + ErrNeedsOwner = "E_NEEDS_OWNER" + // ErrBadSignature — The approval signature is missing or does not verify. + ErrBadSignature = "E_BAD_SIGNATURE" + // ErrNoApprovalKey — This phone has no approval key on the box. + ErrNoApprovalKey = "E_NO_APPROVAL_KEY" + // ErrNotFound — No such agent or request. + ErrNotFound = "E_NOT_FOUND" ) // ErrorRetryable reports whether the app should offer a retry for a code. @@ -278,6 +342,14 @@ var ErrorRetryable = map[string]bool{ ErrUnsupportedMedia: false, ErrWholeDocument: false, ErrLocalOnly: false, + ErrGrantExpired: false, + ErrOpNotGranted: false, + ErrCapExceeded: false, + ErrRateLimited: true, + ErrNeedsOwner: false, + ErrBadSignature: false, + ErrNoApprovalKey: false, + ErrNotFound: false, } // SourceState says whether a device is answering. It is orthogonal to the diff --git a/go/protocol/envelope.go b/go/protocol/envelope.go index 922e9957a..08321e5a2 100644 --- a/go/protocol/envelope.go +++ b/go/protocol/envelope.go @@ -65,6 +65,10 @@ type Envelope struct { // B is the body, left encoded so the handler can unmarshal it into the // type the message name implies. B cbor.RawMessage `cbor:"b,omitempty"` + // By names the person behind a call from a Sourceful support session: + // the staff member's id, at most ByMax bytes. FTW Cloud asserts it and + // the box writes it to its audit log. Absent on every other session. + By string `cbor:"by,omitempty"` } // Frame is one envelope on one lane. Package appwire owns the byte layout, the diff --git a/go/protocol/push_gen.go b/go/protocol/push_gen.go index bb6a93f20..31aacb6b4 100644 --- a/go/protocol/push_gen.go +++ b/go/protocol/push_gen.go @@ -18,6 +18,8 @@ const ( PushBoxUnreachable = "box.unreachable" PushCloudGranted = "cloud.granted" PushCloudRevoked = "cloud.revoked" + PushAgentAdded = "agent.added" + PushAgentRequest = "agent.request" ) // PushSentence is one lock-screen sentence, exactly as the app wrote it. @@ -39,4 +41,6 @@ var PushSentences = map[string]PushSentence{ PushBoxUnreachable: {Title: "Your box is out of reach", Body: "It stopped answering. Power cut, or the internet at home is down."}, PushCloudGranted: {Title: "FTW Cloud is on", Body: "Your box now shares a copy of its readings with FTW Cloud. You can turn it off in the app or on the box."}, PushCloudRevoked: {Title: "FTW Cloud is off", Body: "Your box stopped sharing with FTW Cloud and asked it to delete its copy."}, + PushAgentAdded: {Title: "New access to your box", Body: "You gave an assistant or Sourceful access. See who has access in the app."}, + PushAgentRequest: {Title: "Waiting for your answer", Body: "An assistant asks to change a setting. Open FTW to confirm or decline."}, } diff --git a/go/protocol/testdata/approval-vectors.json b/go/protocol/testdata/approval-vectors.json new file mode 100644 index 000000000..eb4d2804e --- /dev/null +++ b/go/protocol/testdata/approval-vectors.json @@ -0,0 +1,43 @@ +{ + "note": "docs/agents.md, The approval signature. signedHex is what the phone signs; sigHex is ECDSA P-256 over SHA-256 of it, r||s.", + "pubHex": "0494bd59f0454b6dffdb14ceb8fb777884a5b85fb3087458ab665a9e43c1943a0b2640997629d88c605987519a24a822fa1787ad19970d6e76761360872f833d2c", + "boxKeyHex": "0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20", + "deviceId": "ownerPh1", + "cases": [ + { + "what": "approval.key.set", + "bodyHex": "a36370756258410494bd59f0454b6dffdb14ceb8fb777884a5b85fb3087458ab665a9e43c1943a0b2640997629d88c605987519a24a822fa1787ad19970d6e76761360872f833d2c63736967584014912a9b26a4afc357e9270d2062272e1e2f5537166581eaa50ba251e4258cf0cea6978c396a00bf448bfce76e14901244c77751fe140151af9b5bcc6f4327776461744d731b000001a13b860000", + "signedHex": "866f6674772e617070726f76616c2e763170617070726f76616c2e6b65792e73657458200102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20686f776e65725068311b000001a13b86000058410494bd59f0454b6dffdb14ceb8fb777884a5b85fb3087458ab665a9e43c1943a0b2640997629d88c605987519a24a822fa1787ad19970d6e76761360872f833d2c", + "sha256Hex": "c1b1e8e41f10d4fb9bf01e62f679c7dab38f157beafc9206732cd50f9ae4e19c", + "sigHex": "14912a9b26a4afc357e9270d2062272e1e2f5537166581eaa50ba251e4258cf0cea6978c396a00bf448bfce76e14901244c77751fe140151af9b5bcc6f432777" + }, + { + "what": "agent.add", + "bodyHex": "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", + "signedHex": "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", + "sha256Hex": "638de060149662d97f7ee71bd30c3d6a76e010171ed21fb874c9d3ea589bfc74", + "sigHex": "978557d327fc030ed6e3d759213ee296dd14c965ad382faa0623d38169b02e824dfaa516b9fb3541f808801f0d5baeddbe4514d05888870d6d8de91ad4a2303a" + }, + { + "what": "agent.add", + "bodyHex": "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", + "signedHex": "8e6f6674772e617070726f76616c2e7631696167656e742e61646458200102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20686f776e65725068311b000001a13b8600005820a0a1a2a3a4a5a6a7a8a9aaabacadaeafb0b1b2b3b4b5b6b7b8b9babbbcbdbebf67737570706f7274826f6674772e6865616c74682e726561646d6674772e6c6f67732e7265616480830000001b000001a1839f080071536f7572636566756c20737570706f727460674654572d313233", + "sha256Hex": "cb6c7351948afb36746cc96b2cbd4111bc19bfbad7f361a743ca6a0615a812eb", + "sigHex": "917a3901d206afc899769f5c2961754c9953ee6d0872c4e1678392473305b69bfb3340d7fd2efaf0fadfacb47d3a6f4495888ea8b2efea4cbde9c2f57b70011d" + }, + { + "what": "agent.widen", + "bodyHex": "a8626964686f4b47696f36536c636f7073f6637369675840eb629e09fca4833882dce48bfcd06ddd70d53b580b88e90df55c90210189721aa7e7c4c767017b94d586167bc2e6098b790a68f045aa7a669793be5ce8434c946461744d731b000001a13b8600006463617073a3646d6178570065686f6c645300667065724d696e066565706f6368026673636f706573826d6674772e6c6976652e726561646d6674772e706c616e2e726561646b6578706972657341744d731b000001a1d604c800", + "signedHex": "8b6f6674772e617070726f76616c2e76316b6167656e742e776964656e58200102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20686f776e65725068311b000001a13b860000686f4b47696f36536c02826d6674772e6c6976652e726561646d6674772e706c616e2e7265616480830000061b000001a1d604c800", + "sha256Hex": "8e46b77de3f7ea09c29527d5de498bf65c89c2b540cfedbd36f12597c9c8fb96", + "sigHex": "eb629e09fca4833882dce48bfcd06ddd70d53b580b88e90df55c90210189721aa7e7c4c767017b94d586167bc2e6098b790a68f045aa7a669793be5ce8434c94" + }, + { + "what": "agent.confirm", + "bodyHex": "a4637369675840892d49415e6de75ef29dbea8ef9530190854dde3f2e2d698c628ec618b8385f56fb97051cb606d653fcb226df04e6ed445a25a2fe2930ac8d39d00cf6603e8bb6461744d731b000001a13b86000065726571496468722d32663165306467617070726f7665f5", + "signedHex": "866f6674772e617070726f76616c2e76316d6167656e742e636f6e6669726d58200102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20686f776e65725068311b000001a13b86000068722d326631653064", + "sha256Hex": "07d81ccbfdb8dc67f403c998357bbb2d91fc48563d21cf3f29fbf37747f0ccec", + "sigHex": "892d49415e6de75ef29dbea8ef9530190854dde3f2e2d698c628ec618b8385f56fb97051cb606d653fcb226df04e6ed445a25a2fe2930ac8d39d00cf6603e8bb" + } + ] +} From f557f6d52cfc425f9dc4fa617371ea5360924968 Mon Sep 17 00:00:00 2001 From: Fredrik Ahlgren Date: Thu, 15 Oct 2026 19:06:19 +0200 Subject: [PATCH 2/8] docs(cloud): the registry holds the cloud and agent names now Co-Authored-By: Claude Opus 5.5 --- docs/protocol-cloud.md | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/docs/protocol-cloud.md b/docs/protocol-cloud.md index d77cedf37..64ad96a0b 100644 --- a/docs/protocol-cloud.md +++ b/docs/protocol-cloud.md @@ -1145,11 +1145,11 @@ owner must suspend again. ## Registry names -The contract registry does not hold these names yet. -[srcfl/ftw-webapp#81](https://github.com/srcfl/ftw-webapp/pull/81) adds them -there first; [#1595](https://github.com/srcfl/ftw/pull/1595) and -[srcfl/ftw-app#15](https://github.com/srcfl/ftw-app/pull/15) copy them here and -to the app. +These names live in the contract registry. srcfl/ftw-webapp added them there +first ([#81](https://github.com/srcfl/ftw-webapp/pull/81), +[#88](https://github.com/srcfl/ftw-webapp/pull/88) and, for agents, +[#90](https://github.com/srcfl/ftw-webapp/pull/90)), and paired pull requests +copied them here and to the app. | Name | Kind | Goes into | |---|---|---| From eeb3a6aa20708ca45be407587af9d5fd418ac67a Mon Sep 17 00:00:00 2001 From: Fredrik Ahlgren Date: Thu, 15 Oct 2026 19:33:01 +0200 Subject: [PATCH 3/8] contract(agents): the grant offer, JSON names and refusals; the doc follows the build The grant offer is a type FTW Cloud's consent page and the box page share. Request routes on the box page move to /api/agent-requests, config.get reads one section, every read fits one bulk frame, and E_RATE_LIMITED carries retryAfterMs in the error body. Co-Authored-By: Claude Opus 5.5 --- docs/agents.md | 39 +++++++++----- go/protocol/agents.go | 121 +++++++++++++++++++++++++++--------------- 2 files changed, 104 insertions(+), 56 deletions(-) diff --git a/docs/agents.md b/docs/agents.md index 883ca4300..a7e2fb609 100644 --- a/docs/agents.md +++ b/docs/agents.md @@ -46,7 +46,8 @@ call whatever the cloud does. tooling sends `agent.revoke` for its own row. An agent may always revoke itself. The expiry is the backstop. - **The release check reads one thing.** Its role carries `ftw.health.read` - and nothing else, and it answers only `hello` and `health.get`. + and nothing else. Beyond `hello` and `health.get` it may only list and + revoke its own row. ## Scopes @@ -139,7 +140,8 @@ open to an agent. - A command past `holdS` or `maxW` gets `E_CAP_EXCEEDED`, with `{cap, max}`. The box never clips an argument; it refuses, so the agent knows what happened. -- A command past `perMin` gets `E_RATE_LIMITED`, with `{retryAfterMs}`. +- A command past `perMin` gets `E_RATE_LIMITED`, with `retryAfterMs` in the + error body. - Reads are limited to 60 a minute per agent, by the box, whatever the caps say. @@ -287,14 +289,21 @@ the caller subject (`agent:`, `app:`, `lan:
` or `box`); | Message | Request | Answer | |---|---|---| -| `health.get` | `{}` | `health {version, uptimeS, clock, drivers: {ok, degraded, faulted, offline}, meter: {srcState, ageMs}, dispatchBlockedBy, planner: {solveMs, fallbacks}, refusals}` | +| `health.get` | `{}` | `health {version, uptimeS, clock, drivers: {ok, degraded, faulted, offline}, meter: {srcState, ageMs}, dispatchBlockedBy}` | | `events.get` | `{n}`, at most 50 | `events {events}`, each the FTW Cloud `event` body | -| `logs.get` | `{n, level}`; `n` at most 200, `level` `warn` by default | `logs {lines: [{ts, level, src, msg}], dropped}` | -| `config.get` | `{}` | `config {doc}` | +| `logs.get` | `{n, level}`; `n` at most 200, `level` `WARN` by default | `logs {lines: [{ts, level, src, msg}], dropped}` | +| `config.get` | `{section}` | `config {sections}` without a section; `config {section, doc}` with one | | `diag.run` | `{check, src}`; `check` is `clock`, `link`, `meter`, `planner` or `driver` | `diag {check, ok, facts}` | -A health field the box cannot fill is absent. `health` carries no readings -and no names: drivers are counted, and `src` is an opaque source id. +- Each answer fits one bulk frame (16 KiB). `logs.get` drops its oldest + lines to fit and counts them in `dropped`. A config section that does not + fit gets `E_RANGE_TOO_LARGE`; an unknown one `E_NOT_FOUND`. +- `health` carries no readings and no names: drivers are counted, and a + source that blocks dispatch goes by an opaque id. Planner solve times, + fallbacks, refusals and plan against actual join it when the box keeps + them; a field the box cannot fill is absent. +- The box answers `events.get` and `diag.run` with `E_UNKNOWN_OP` until it + builds them. ## Redaction on the box @@ -310,7 +319,7 @@ unredacted, and nothing is stored in the cloud. credential: bearer and basic headers, secret-named keys and long tokens. A line's attributes keep their keys; a value stays only when it is a number, a boolean, a duration or a short lowercase word, and is otherwise replaced - by `[omitted]`. At most 200 lines and 32 KiB. + by `[omitted]`. At most 200 lines, in one bulk frame. - **Config.** Every secret-named key is replaced by `***`. Names become opaque ids. Location, addresses, host names, URLs, serials, MAC addresses, vehicle ids, e-mail addresses and notification targets are removed. @@ -418,12 +427,16 @@ above and its approval key, and an agent can never reach them. |---|---| | `GET /api/agents` | A client on the LAN. Rows, requests and keys | | `GET /api/agents/audit?before=&n=` | A client on the LAN | -| `POST /api/agents {grant offer}` | The box itself, or a LAN client signed in with the house password | -| `POST /api/agents/{id}/widen` | The same | -| `POST /api/agents/requests/{reqId} {approve: true}` | The same | -| `POST /api/agents/requests/{reqId} {approve: false}` | A client on the LAN | +| `POST /api/agents {offer, scopes, ops, caps, ttlS}` | The box itself, or a LAN client signed in with the house password | +| `POST /api/agents/{id}/widen {epoch, scopes, ops, caps, ttlS}` | The same | +| `POST /api/agent-requests/{reqId} {approve: true}` | The same | +| `POST /api/agent-requests/{reqId} {approve: false}` | A client on the LAN | | `DELETE /api/agents/{id}` | A client on the LAN | +`offer` is the [grant offer](#the-grant-offer) as the consent page shows +it. The owner may grant less: `scopes`, `ops`, `caps` and `ttlS` replace the +offer's when given. The box refuses an offer for another home id. + Widening needs the house password because the LAN sign-in is otherwise nothing at all. What the box has today: @@ -502,7 +515,7 @@ forwarded; neither replaces the other. | `agent.request` args, `why` | 1 KiB, 280 bytes | | Approval `atMs` window | 10 minutes either way | | Signature replay memory | 20 minutes | -| `logs.get` | 200 lines, 32 KiB | +| `logs.get` | 200 lines, one 16 KiB frame | | `events.get` | 50 events | | `audit.get` | 200 rows a page; 10,000 rows and 90 days kept | | `by` on a support call | 64 bytes | diff --git a/go/protocol/agents.go b/go/protocol/agents.go index 2b062ea7d..4e7a7066d 100644 --- a/go/protocol/agents.go +++ b/go/protocol/agents.go @@ -86,8 +86,8 @@ const ( ApprovalSkewMs int64 = 10 * 60 * 1000 ApprovalReplayMs int64 = 20 * 60 * 1000 + // LogsLinesMax bounds logs.get; the answer also fits one bulk frame. LogsLinesMax = 200 - LogsBytesMax = 32 * 1024 EventsMax = 50 AuditPageMax = 200 AuditRowsKept = 10_000 @@ -101,35 +101,35 @@ const ( // Caps bound what one grant may do. type Caps struct { // HoldS is the longest hold, in seconds. - HoldS uint64 `cbor:"holdS"` + HoldS uint64 `cbor:"holdS" json:"holdS"` // MaxW is the largest power a hold may set, in W. - MaxW uint64 `cbor:"maxW"` + MaxW uint64 `cbor:"maxW" json:"maxW"` // PerMin is cmd and agent.request per rolling minute. - PerMin uint64 `cbor:"perMin"` + PerMin uint64 `cbor:"perMin" json:"perMin"` } // Principal says who an agent row is for. Display and audit only: the role // decides what it may do. type Principal struct { - Client string `cbor:"client"` - ClientID string `cbor:"clientId"` - Ticket string `cbor:"ticket"` + Client string `cbor:"client" json:"client"` + ClientID string `cbor:"clientId" json:"clientId"` + Ticket string `cbor:"ticket" json:"ticket"` } // AgentRow is one agent grant as the box holds it. type AgentRow struct { - ID string `cbor:"id"` - Key []byte `cbor:"key"` - Role string `cbor:"role"` - Scopes []string `cbor:"scopes"` - Ops []string `cbor:"ops"` - Caps Caps `cbor:"caps"` - ExpiresAtMs int64 `cbor:"expiresAtMs"` - Principal Principal `cbor:"principal"` - ApprovedBy string `cbor:"approvedBy"` - AddedAtMs int64 `cbor:"addedAtMs"` - LastSeenMs int64 `cbor:"lastSeenMs"` - Epoch uint64 `cbor:"epoch"` + ID string `cbor:"id" json:"id"` + Key []byte `cbor:"key" json:"key"` + Role string `cbor:"role" json:"role"` + Scopes []string `cbor:"scopes" json:"scopes"` + Ops []string `cbor:"ops" json:"ops"` + Caps Caps `cbor:"caps" json:"caps"` + ExpiresAtMs int64 `cbor:"expiresAtMs" json:"expiresAtMs"` + Principal Principal `cbor:"principal" json:"principal"` + ApprovedBy string `cbor:"approvedBy" json:"approvedBy"` + AddedAtMs int64 `cbor:"addedAtMs" json:"addedAtMs"` + LastSeenMs int64 `cbor:"lastSeenMs" json:"lastSeenMs"` + Epoch uint64 `cbor:"epoch" json:"epoch"` } // ApprovalKeySet registers an owner phone's approval key. @@ -164,6 +164,28 @@ type AgentWiden struct { Sig []byte `cbor:"sig"` } +// GrantOffer is what FTW Cloud's consent page offers the owner: the agent's +// key and the rights its client asks for (docs/agents.md, The grant offer). +// It travels as CBOR, base64url without padding, in a link's fragment. The +// owner may grant less than it asks. +type GrantOffer struct { + V uint64 `cbor:"v"` + Home string `cbor:"home"` + Key []byte `cbor:"key"` + Role string `cbor:"role"` + Client string `cbor:"client"` + ClientID string `cbor:"clientId"` + Scopes []string `cbor:"scopes"` + Ops []string `cbor:"ops"` + Caps Caps `cbor:"caps"` + TTLS uint64 `cbor:"ttlS"` + Ticket string `cbor:"ticket,omitempty"` + Code string `cbor:"code"` +} + +// GrantOfferVersion is GrantOffer.V. +const GrantOfferVersion = 1 + // AgentRevoke removes a grant. No signature. type AgentRevoke struct { ID string `cbor:"id"` @@ -186,27 +208,27 @@ type AgentConfirm struct { // Request is one durable change an agent asked for. type Request struct { - ReqID string `cbor:"reqId"` - Agent string `cbor:"agent"` - Op string `cbor:"op"` - Args map[string]any `cbor:"args"` - Why string `cbor:"why"` - AtMs int64 `cbor:"atMs"` - ExpiresAtMs int64 `cbor:"expiresAtMs"` - State string `cbor:"state"` + ReqID string `cbor:"reqId" json:"reqId"` + Agent string `cbor:"agent" json:"agent"` + Op string `cbor:"op" json:"op"` + Args map[string]any `cbor:"args" json:"args"` + Why string `cbor:"why" json:"why"` + AtMs int64 `cbor:"atMs" json:"atMs"` + ExpiresAtMs int64 `cbor:"expiresAtMs" json:"expiresAtMs"` + State string `cbor:"state" json:"state"` } // ApprovalKeyInfo is one owner phone's registered approval key. type ApprovalKeyInfo struct { - DeviceID string `cbor:"deviceId"` - SetAtMs int64 `cbor:"setAtMs"` + DeviceID string `cbor:"deviceId" json:"deviceId"` + SetAtMs int64 `cbor:"setAtMs" json:"setAtMs"` } // AgentList is agent.ok's body for agent.list. An agent sees its own row. type AgentList struct { - Agents []AgentRow `cbor:"agents"` - Requests []Request `cbor:"requests"` - Keys []ApprovalKeyInfo `cbor:"keys"` + Agents []AgentRow `cbor:"agents" json:"agents"` + Requests []Request `cbor:"requests" json:"requests"` + Keys []ApprovalKeyInfo `cbor:"keys" json:"keys"` } // AuditGet pages through the audit log, newest first. @@ -217,21 +239,21 @@ type AuditGet struct { // AuditRow is one line of the box's audit log. type AuditRow struct { - Seq uint64 `cbor:"seq"` - AtMs int64 `cbor:"atMs"` - Actor string `cbor:"actor"` - Role string `cbor:"role"` - Principal string `cbor:"principal"` - By string `cbor:"by"` - What string `cbor:"what"` - Target string `cbor:"target"` - Result string `cbor:"result"` + Seq uint64 `cbor:"seq" json:"seq"` + AtMs int64 `cbor:"atMs" json:"atMs"` + Actor string `cbor:"actor" json:"actor"` + Role string `cbor:"role" json:"role"` + Principal string `cbor:"principal" json:"principal"` + By string `cbor:"by" json:"by"` + What string `cbor:"what" json:"what"` + Target string `cbor:"target" json:"target"` + Result string `cbor:"result" json:"result"` } // AuditPage is agent.ok's body for audit.get. type AuditPage struct { - Rows []AuditRow `cbor:"rows"` - More bool `cbor:"more"` + Rows []AuditRow `cbor:"rows" json:"rows"` + More bool `cbor:"more" json:"more"` } // LogsGet asks for a redacted log excerpt. @@ -369,3 +391,16 @@ func VerifyApproval(pub []byte, msg, sig []byte) error { func sortedUnique(list []string) bool { return slices.IsSorted(list) && len(slices.Compact(slices.Clone(list))) == len(list) } + +// Refusal is a refusal on its way to the wire: a registry code and its +// machine-readable args. The box's layers return it so the one that answers +// the caller need not translate. +type Refusal struct { + Code string + Args map[string]any +} + +func (r *Refusal) Error() string { return fmt.Sprintf("protocol: refused %s %v", r.Code, r.Args) } + +// Refuse builds a Refusal. +func Refuse(code string, args map[string]any) *Refusal { return &Refusal{Code: code, Args: args} } From b7d1cc805d9e14b1079a3bd06f86b991b3f75cfa Mon Sep 17 00:00:00 2001 From: Fredrik Ahlgren Date: Thu, 15 Oct 2026 20:09:18 +0200 Subject: [PATCH 4/8] contract(agents): the review's fixes before merge Blockers: - Only FTW Cloud's keys part opens an agent's session: agent rows carry tun false and no copy scopes, and the cloud admits them on no door. - Offers are signed by a pinned offer key (SignedOffer, OpenOffer), live at most ten minutes, carry clientHost and verified, leave home empty, and a support offer comes only from SupportClientID. - Agent holds: battery.hold and loadpoint.boost lose their agent scope; agent_args allowlists each op's arguments; holds carry their setter, an owner's hold wins, and revoke or expiry ends an agent's holds. - The box page needs the house password for every widening route, from loopback too, and drivers never reach the box. Signed bytes and wire shapes: - agent.widen signs the row's key; agent.confirm signs the agent, the op and the hash of the args; request ids are 128 bits; replay memory keys on the signed bytes. - by is staff: or bot:, and only a support session may send it. - The roster carries the box's Noise key (noise) for the keys part. - Typed reads (live.get, loadpoints.get, cars.get, drivers.get) and cursors on logs and events, listed in the registry's reads table. - approval.key.set takes prevSig; audit rows carry count; agent.decided tells an agent how a request ended; E_CLOCK_SKEW; push kinds agent.expiring, approval.key.set and owner.added. Vectors regenerated: approval, offer and roster. Co-Authored-By: Claude Opus 5.5 --- contract/push-catalogue.yaml | 15 + contract/registry.yaml | 67 ++- docs/agents.md | 461 ++++++++++++------ docs/protocol-cloud.md | 20 +- .../appproto/gencontract/gencontract.go | 64 ++- go/protocol/agents.go | 245 +++++++++- go/protocol/agents_test.go | 225 ++++++++- go/protocol/cloudwire/allowlist.go | 2 +- go/protocol/cloudwire/messages.go | 4 + .../cloudwire/testdata/cloud-vectors.json | 40 +- go/protocol/cloudwire/vectors_test.go | 22 +- go/protocol/contract_gen.go | 63 ++- go/protocol/push_gen.go | 6 + go/protocol/testdata/approval-vectors.json | 41 +- 14 files changed, 1025 insertions(+), 250 deletions(-) diff --git a/contract/push-catalogue.yaml b/contract/push-catalogue.yaml index 4dfe934d2..4c7f3b9f5 100644 --- a/contract/push-catalogue.yaml +++ b/contract/push-catalogue.yaml @@ -71,3 +71,18 @@ events: # one of them to confirm it, and runs out after twelve hours. title: Waiting for your answer body: "An assistant asks to change a setting. Open FTW to confirm or decline." + - kind: agent.expiring + # To every owner, a day before an agent's grant runs out, so access that + # should go on is renewed and access that should end can be left to end. + title: Access ends tomorrow + body: "An assistant's or Sourceful's access to your box runs out in a day. Renew it in the app if it should go on." + - kind: approval.key.set + # To every owner, when a phone registers or replaces the key that + # approves access. A new key is a new way to let others in. + title: A phone can now approve access + body: "A phone set up the key it uses to approve access to your box. If that was not you, remove the phone in the app." + - kind: owner.added + # To every owner, when a phone pairs as an owner. An owner can do + # anything, including give others access. + title: A new owner + body: "A phone was paired as an owner of your box. If that was not you, remove it in the app." diff --git a/contract/registry.yaml b/contract/registry.yaml index 50c60088b..dfa8a8521 100644 --- a/contract/registry.yaml +++ b/contract/registry.yaml @@ -139,6 +139,7 @@ scopes: - { name: ftw.diag.run, desc: Checks that change nothing } - { name: ftw.dispatch.hold, desc: Hold energy assets for a capped time } - { name: ftw.goals.request, desc: Ask an owner to change a durable goal } + # Reserved: no op asks for an update yet, and no role but owner carries it. - { name: ftw.update.request, desc: Ask an owner to install a version } roles: @@ -205,14 +206,16 @@ cloud_purposes: [serve, stats] # ftw.dispatch.hold runs now as a cmd, within the grant's caps, and must end # by itself. ftw.goals.request never runs as a cmd: it waits as an # agent.request until an owner confirms it. An op without agent is never -# open to an agent. +# open to an agent. battery.hold and loadpoint.boost have none until the box +# can bound them: battery.hold has no handler yet, and a boost has no power +# of its own to hold to maxW. agent_args below says what an agent may send. # --------------------------------------------------------------------------- ops: - { name: site.mode.set, scope: ftw.mode.write, agent: ftw.goals.request, desc: Change the site operating mode } - { name: planner.prefs.set, scope: ftw.mode.write, agent: ftw.goals.request, desc: Set household planner preferences } - - { name: battery.hold, scope: ftw.dispatch.write, agent: ftw.dispatch.hold, desc: Hold the battery at a fixed setpoint } + - { name: battery.hold, scope: ftw.dispatch.write, desc: Hold the battery at a fixed setpoint } - { name: loadpoint.hold, scope: ftw.dispatch.write, agent: ftw.dispatch.hold, desc: Charge the car now at a fixed current } - - { name: loadpoint.boost, scope: ftw.dispatch.write, agent: ftw.dispatch.hold, desc: Boost the car from the house battery } + - { name: loadpoint.boost, scope: ftw.dispatch.write, desc: Boost the car from the house battery } - { name: loadpoint.soc.set, scope: ftw.dispatch.write, agent: ftw.goals.request, desc: Correct the car's current charge level } - { name: loadpoint.surplus_only.set, scope: ftw.dispatch.write, agent: ftw.goals.request, desc: Charge the car from surplus PV only } @@ -291,7 +294,10 @@ errors: - { code: E_NEEDS_OWNER, retryable: false, desc: A durable change waits for an owner as agent.request } - { code: E_BAD_SIGNATURE, retryable: false, desc: The approval signature is missing or does not verify } - { code: E_NO_APPROVAL_KEY, retryable: false, desc: This phone has no approval key on the box } - - { code: E_NOT_FOUND, retryable: false, desc: No such agent or request } + - { code: E_NOT_FOUND, retryable: false, desc: Nothing by that id or name } + # An approval whose atMs is too far from the box's wall clock. args.boxMs + # is the box's clock, so the phone can sign again with the right time. + - { code: E_CLOCK_SKEW, retryable: true, desc: The approval's time is too far from the box's } # --------------------------------------------------------------------------- # Error codes the client raises for itself. @@ -340,3 +346,56 @@ carrier_states: [webrtc, relay, tunnel, cloud, cache, none] resolutions: '5m': { tile_span_ms: 43200000, retention_days: 30, source: energy_ledger } '1h': { tile_span_ms: 604800000, retention_days: 730, source: hourly_rollup } + +# --------------------------------------------------------------------------- +# What an agent may put in each op it can name (docs/agents.md in srcfl/ftw, +# Operations). The box refuses any other key, a value of another kind and one +# outside its range, in a cmd and in an agent.request, as it arrives. label is +# the words the app shows an owner for the value. cap names the grant's cap +# that bounds it as well. kind says how to read the value: +# loadpoint the opaque charger id the agent read from loadpoints.get +# mode a key in modes +# enum one of values +# number, power, duration a number in unit +# ratio a fraction from 0 to 1 +# bool true or false +# --------------------------------------------------------------------------- +agent_args: + site.mode.set: + - { name: mode, kind: mode, required: true, label: Operating mode } + planner.prefs.set: + - { name: safety_k, kind: number, min: 0, max: 2, label: How cautious the plan is } + - { name: battery_export, kind: enum, values: [unknown, not_allowed, allowed], label: Whether the battery may sell to the grid } + loadpoint.hold: + - { name: id, kind: loadpoint, required: true, label: Charger } + - { name: power_w, kind: power, unit: W, min: 0, cap: maxW, label: Charging power } + - { name: hold_s, kind: duration, unit: s, min: 1, cap: holdS, label: For how long } + - { name: phase_mode, kind: enum, values: [auto, 1p, 3p], label: Phases } + - { name: clear, kind: bool, label: Stop the agent's own hold } + loadpoint.soc.set: + - { name: id, kind: loadpoint, required: true, label: Charger } + - { name: soc, kind: ratio, required: true, min: 0, max: 1, label: The car's charge level } + loadpoint.surplus_only.set: + - { name: id, kind: loadpoint, required: true, label: Charger } + - { name: surplus_only, kind: bool, required: true, label: Charge from solar only } + +# --------------------------------------------------------------------------- +# Reads an agent may send, and the scope each needs (docs/agents.md in +# srcfl/ftw, Reads). Their answers name nothing: sources, chargers and cars +# go by opaque ids the box cuts with a key of its own. An agent has no sub; +# live.get is its view of now. A phone may send these too, under the same +# scope. +# --------------------------------------------------------------------------- +reads: + - { msg: live.get, scope: ftw.live.read, desc: Readings and freshness now } + - { msg: loadpoints.get, scope: ftw.live.read, desc: Each charger and the car on it } + - { msg: cars.get, scope: ftw.live.read, desc: Each car's level and goal } + - { msg: plan.get, scope: ftw.plan.read, desc: The plan and its reasons } + - { msg: price.get, scope: ftw.plan.read, desc: Electricity prices } + - { msg: hist.query, scope: ftw.history.read, desc: Stored history } + - { msg: health.get, scope: ftw.health.read, desc: The health summary } + - { msg: drivers.get, scope: ftw.health.read, desc: Each driver's state } + - { msg: events.get, scope: ftw.events.read, desc: Recent events } + - { msg: logs.get, scope: ftw.logs.read, desc: A log excerpt the box redacts } + - { msg: config.get, scope: ftw.config.read, desc: A configuration section the box redacts } + - { msg: diag.run, scope: ftw.diag.run, desc: A check that changes nothing } diff --git a/docs/agents.md b/docs/agents.md index a7e2fb609..e23c6e042 100644 --- a/docs/agents.md +++ b/docs/agents.md @@ -4,10 +4,11 @@ Proposed. Nothing here has shipped. This document is normative: "must" is a requirement on the box, FTW Cloud or the app. It extends the app protocol ([srcfl/ftw-webapp docs/protocol.md](https://github.com/srcfl/ftw-webapp/blob/main/docs/protocol.md)) and the [FTW Cloud protocol](protocol-cloud.md). Names in `code` that are -scopes, roles, operations, error codes, capabilities or push kinds live in -`contract/registry.yaml` and `contract/push-catalogue.yaml`. The message -shapes and the approval digest live in `go/protocol/agents.go`, with golden -vectors in `go/protocol/testdata/approval-vectors.json`. +scopes, roles, operations, error codes, capabilities, push kinds, agent +arguments or reads live in `contract/registry.yaml` and +`contract/push-catalogue.yaml`. The message shapes, the approval signature +and the signed offer live in `go/protocol/agents.go`, with golden vectors in +`go/protocol/testdata/approval-vectors.json`. ## What it is for @@ -18,11 +19,18 @@ An owner can let something other than a paired phone reach the box: - Sourceful support, for one ticket; - the release check, which reads a health summary while the box runs a beta. -FTW Cloud holds the agent's private key and opens its session. The box -decides everything: the role, the scopes, the operations, the caps and the -expiry. The cloud can admit an agent; only the box can let it act. Each -check runs again on every call, so a revoke or an expiry bites at the next -call whatever the cloud does. +FTW Cloud's `keys` part holds the agent's private key and alone opens its +session, for a call through MCP that the agent's OAuth token allows. The box +decides everything: the role, the scopes, the operations, the arguments, the +caps and the expiry. FTW Cloud can admit an agent; only the box can let it +act. Each check runs again on every call, so a revoke or an expiry bites at +the next call whatever FTW Cloud does. + +**What FTW Cloud sees.** It holds the agent's key, so it can read every +answer an agent gets. Answers to agents therefore name nothing: sources, +chargers and cars go by opaque ids the box cuts with a key of its own, logs +and configuration are redacted on the box, and an agent has no `sub` stream, +whose source table carries names. ## Principals @@ -37,17 +45,26 @@ call whatever the cloud does. its row lists that its approver holds now: the approving phone's role today, or every scope for a grant made on the box page. A phone demoted to viewer narrows its agents at the next call. Removing the phone removes its - agents, as it removes its watches. -- **A support call names a person.** Each envelope a `support` session sends - carries `by`: the staff member's id at Sourceful, at most 64 bytes. The box - refuses a call without it and writes it to the audit log. The box cannot - check it; FTW Cloud signs the staff member in and asserts it. + agents, as it removes its watches. When another owner widens a grant, that + owner becomes its approver. +- **A support call names who made it.** Each envelope a `support` session + sends carries `by`: `staff:` for a person at Sourceful or + `bot:` for Sourceful's own tooling, at most 64 bytes of letters, + digits and `._@-` after the colon. The box refuses a support call without + it, refuses `by` from every other session, and writes it to the audit log. + The box cannot check it; FTW Cloud signs the staff member in and asserts + it, and the app labels it "named by FTW Cloud". - **The ticket closing ends the grant.** When a ticket closes, Sourceful's - tooling sends `agent.revoke` for its own row. An agent may always revoke - itself. The expiry is the backstop. + tooling sends `agent.revoke` for its own row. A box offline at that moment + is revoked again when it next connects; the tooling keeps closed tickets + until their rows are gone. An agent may always revoke itself. The expiry + is the backstop. - **The release check reads one thing.** Its role carries `ftw.health.read` - and nothing else. Beyond `hello` and `health.get` it may only list and - revoke its own row. + and nothing else, so it may send `hello`, `health.get`, `drivers.get`, and + `agent.list` and `agent.revoke` for its own row. +- **One session per row.** The box holds one session per agent row, as per + device. The `keys` part carries every MCP call for a row on that one + session; `by` names who made each support call. ## Scopes @@ -59,9 +76,9 @@ these: | `ftw.logs.read` | Read a log excerpt that the box redacts before it leaves | | `ftw.config.read` | Read the configuration, redacted on the box | | `ftw.diag.run` | Run checks that change nothing | -| `ftw.dispatch.hold` | Hold a device for a capped time; the hold ends unless renewed | +| `ftw.dispatch.hold` | Hold a charger for a capped time; the hold ends unless renewed | | `ftw.goals.request` | Ask for a durable change, which waits for an owner | -| `ftw.update.request` | Later: ask to install a version, which an owner confirms | +| `ftw.update.request` | Reserved: no op uses it yet | The roles `agent` and `support` carry at most `ftw.live.read`, `ftw.history.read`, `ftw.plan.read`, `ftw.health.read`, `ftw.events.read`, @@ -69,79 +86,94 @@ The roles `agent` and `support` carry at most `ftw.live.read`, `ftw.goals.request`. A grant names a subset. Agents read by default; an owner ticks control to add `ftw.dispatch.hold` or `ftw.goals.request`. -## What each scope opens +## What an agent may send An agent session is the app session, `ftw.session.v1`, between the agent's key and the box. It uses the messages below and no others. The box answers -any other request from an agent with `E_SCOPE_DENIED`. A phone's session is -unchanged by this document, except that the new reads below check their -scope for phones too. +any other request from an agent with `E_SCOPE_DENIED`. | Message | Needs | Answer | |---|---|---| -| `hello` | — | `hello_ok`, with the role and the scopes the agent holds now | -| `sub` | `ftw.live.read` | The live stream, as for a phone | -| `plan.get`, `price.get` | `ftw.plan.read` | `plan`, `price` | -| `hist.query` | `ftw.history.read` | `hist.chunk` | -| `health.get` | `ftw.health.read` | `health` | -| `events.get` | `ftw.events.read` | `events` | -| `logs.get` | `ftw.logs.read` | `logs` | -| `config.get` | `ftw.config.read` | `config` | -| `diag.run` | `ftw.diag.run` | `diag` | +| `hello` | — | `hello_ok`, with the role and the scopes the agent holds now, and no `cloud` | +| A read in the registry's `reads` | Its scope there | See [Reads](#reads) | | `cmd` | The op's agent scope, `ftw.dispatch.hold` | `cmd.ack`, `cmd.result` | | `agent.request` | The op's agent scope, `ftw.goals.request` | `agent.ok` | | `agent.list` | — | `agent.ok` with the agent's own row and requests | | `agent.revoke` | — | `agent.ok`; only for the agent's own id | -`api.req`, the passthrough, is refused to every agent with `E_SCOPE_DENIED`: -its routes are priced for an owner, not for an agent. A box that lacks one of -the reads answers `E_UNKNOWN_OP`, as it does for any message it does not -know. +`sub` and `api.req` are refused to every agent with `E_SCOPE_DENIED`: a +`sub` stream's source table names the devices, and the passthrough's routes +are priced for an owner. A box that lacks one of the reads answers +`E_UNKNOWN_OP`, as it does for any message it does not know. A phone may +send the reads too, under the same scopes. ## Operations Each op in the registry may name an `agent` scope. An op without one is never open to an agent. -| Op | Phone scope | Agent scope | For an agent | -|---|---|---|---| -| `battery.hold` | `ftw.dispatch.write` | `ftw.dispatch.hold` | `cmd`, under the caps | -| `loadpoint.hold` | `ftw.dispatch.write` | `ftw.dispatch.hold` | `cmd`; `hold_s` from 1 to the cap, never 0 | -| `loadpoint.boost` | `ftw.dispatch.write` | `ftw.dispatch.hold` | `cmd`; `duration_s` from 1 to the cap, or `expires_at_ms` within it | -| `site.mode.set` | `ftw.mode.write` | `ftw.goals.request` | `agent.request` only | -| `planner.prefs.set` | `ftw.mode.write` | `ftw.goals.request` | `agent.request` only | -| `loadpoint.soc.set` | `ftw.dispatch.write` | `ftw.goals.request` | `agent.request` only | -| `loadpoint.surplus_only.set` | `ftw.dispatch.write` | `ftw.goals.request` | `agent.request` only | +| Op | Agent scope | For an agent | +|---|---|---| +| `loadpoint.hold` | `ftw.dispatch.hold` | `cmd`, under the caps and the hold rules below | +| `site.mode.set` | `ftw.goals.request` | `agent.request` only | +| `planner.prefs.set` | `ftw.goals.request` | `agent.request` only | +| `loadpoint.soc.set` | `ftw.goals.request` | `agent.request` only | +| `loadpoint.surplus_only.set` | `ftw.goals.request` | `agent.request` only | +| `battery.hold`, `loadpoint.boost` | none | Never. They return when the box can bound them: `battery.hold` has no handler, and a boost has no power of its own to hold to `maxW` | - **A per-grant allowlist.** A grant lists `ops`, a subset of the ops whose agent scope the grant holds. The box refuses an op the grant does not list with `E_OP_NOT_GRANTED`, even when the agent holds its scope. -- **A hold ends unless renewed.** `ftw.dispatch.hold` ops must carry an end - within `caps.holdS`. A `loadpoint.hold` with `hold_s` 0 is the persistent - operator hold, and an agent may never send one. Releasing a hold (`clear`, - `cancel`) needs only the op in the allowlist. +- **An allowlist of arguments.** The registry's `agent_args` says, per op, + which keys an agent may send, of which kind, in which range, which are + required, and which grant cap bounds them, with a label the app shows the + owner. The box refuses any other key, kind or value, in a `cmd` and in an + `agent.request`, as it arrives, with `E_UNKNOWN_OP {op, arg}`. For + `loadpoint.hold` that is `id`, `power_w`, `hold_s`, `phase_mode` and + `clear`; `voltage`, `max_amps_per_phase`, `site_phases`, `phase_split_w` + and `min_phase_hold_s` stay with owners. +- **Ids are the agent's.** A `loadpoint` argument is the opaque charger id + the agent read from `loadpoints.get`. The box resolves it with its own + agent key, so an id from another box, or from the readable copy, names + nothing (`E_UNKNOWN_OP {arg: "id"}`). - **A durable change waits.** An agent that sends a `ftw.goals.request` op as `cmd` gets `E_NEEDS_OWNER`, with `{use: "agent.request"}`. - **The checks run in Core's order:** the command's expiry, a known op, the - live grant (revoke and expiry), the scope, then for an agent the - allowlist, the rate and the caps, then `expect.rev`, the dispatch gate and - the guards. + live grant (revoke, expiry and clock), the op's agent scope, the + allowlist, the arguments, the rate, the caps and the hold rules, then + `expect.rev`, the dispatch gate and the guards. - **Its own command log.** An agent's command ids live under its own root, `agent:`, never an owner's. +### Holds + +- **A hold ends unless renewed.** `hold_s` runs from 1 to `caps.holdS`. A + `loadpoint.hold` with `hold_s` 0 or none is the persistent operator hold, + and an agent may never send one. +- **The owner's hold wins.** Every hold carries its setter. An agent's hold + carries `agent:`. While a hold an owner set is active on a charger, + an agent's `loadpoint.hold` there gets `E_NEEDS_OWNER`, and an agent never + replaces or clears it. `clear` releases only a hold the same agent set. +- **The box ends an agent's holds** when its grant is revoked or expires, + at once, whatever the hold had left. +- **Renewal is a tool call.** FTW Cloud never renews a hold on its own; it + sends one only in answer to the agent's tool call. Charging for longer than + `holdS` is a durable goal: a `ftw.goals.request` op, such as the car's goal + in the car contract. + ## Caps | Cap | Meaning | Box limits | |---|---|---| | `holdS` | The longest hold, in seconds | 60 to 1,800. Required with `ftw.dispatch.hold` | -| `maxW` | The largest power a hold may set, in W | 1 to 100,000. Required with `ftw.dispatch.hold` | -| `perMin` | `cmd` and `agent.request` per rolling minute | 1 to 60. Default 6 | +| `maxW` | The largest power a hold may set, in W, in either direction | 1 to 100,000. Required with `ftw.dispatch.hold` | +| `perMin` | `cmd` and `agent.request` per rolling minute | 1 to 60. 0 in a grant means the default, 6 | - A command past `holdS` or `maxW` gets `E_CAP_EXCEEDED`, with `{cap, max}`. The box never clips an argument; it refuses, so the agent knows what happened. - A command past `perMin` gets `E_RATE_LIMITED`, with `retryAfterMs` in the - error body. + error body. The minute is the agent's across all its sessions. - Reads are limited to 60 a minute per agent, by the box, whatever the caps say. @@ -150,18 +182,26 @@ open to an agent. 1. The agent sends `agent.request {op, args, why}`. `why` is at most 280 bytes of the agent's own words, shown to the owner as the agent's, never as the box's. -2. The box checks the op as for a `cmd`: known, granted, scope, rate. It - stores the request and answers `agent.ok {reqId, expiresAtMs}`. +2. The box checks the op as for a `cmd` (known, granted, scope, rate) and + checks `args` against `agent_args` and the op's own validation, now, as it + arrives. It stores the request with a 128-bit `reqId` and answers + `agent.ok {reqId, expiresAtMs}`. 3. The box pushes `agent.request` to every owner through its event path, and writes an audit row. -4. An owner reads it with `agent.list` and answers with `agent.confirm`. - Approving needs an approval signature; declining needs none. +4. An owner reads it with `agent.list`. The app shows the op and each + argument by its label, and the agent's `why` as the agent's words. The + owner answers with `agent.confirm`. Approving needs an approval signature + over the request id, the agent, the op and the hash of the args; declining + needs none. 5. On approval the box runs the op on the confirming owner's session as a command with id `req:`, under the owner's scopes and against fresh state, and sends that session `cmd.ack` and `cmd.result`. Nothing the agent sent decides whether it may act; the owner's confirmation does. -6. A request no owner answers within 12 hours expires. The box keeps a - decided or expired request for 24 hours, so the agent can read its state. +6. When a request is decided or expires, the box sends the agent's session, + if one is open, `agent.decided {reqId, state, cmdId, result}`. A request + no owner answers within 12 hours expires. The box keeps a decided or + expired request for 24 hours, so the agent can read its state with + `agent.list`. Pending requests live in memory. A restart drops them, and the agent asks again. @@ -169,7 +209,9 @@ again. ## Messages All of these ride in the app session. Each request carries an envelope `id` -and gets `agent.ok` with that id, or `error` with that id and a code. +and gets `agent.ok` with that id, or `error` with that id and a code. The +box decodes a signed message strictly: a key it does not know, or a key +twice, is `E_UNKNOWN_OP {field}`. ### `approval.key.set` — an owner phone registers its approval key @@ -177,18 +219,26 @@ and gets `agent.ok` with that id, or `error` with that id and a code. |---|---|---| | `pub` | bstr, 65 | P-256 public key, SEC1 uncompressed | | `atMs` | int | The phone's wall clock | -| `sig` | bstr, 64 | Proof of possession: the approval signature over `pub` | +| `sig` | bstr, 64 | The new key's signature: proof the phone holds it | +| `prevSig` | bstr, 64, optional | The phone's current key's signature over the same bytes | Answer `{deviceId, setAtMs}`. Only an owner phone may send it, and only for -itself. A new key replaces the phone's old one and writes an audit row. -Errors: `E_SCOPE_DENIED` (not an owner), `E_BAD_SIGNATURE`, -`E_UNKNOWN_OP` with `{field}` for a malformed body. +itself. + +- A phone with no key yet registers one with `sig` alone. +- Replacing a key needs `prevSig` from the key it replaces. A phone that lost + its key (a new Face ID enrolment voids it) replaces it on the box page + with the house password. +- The box pushes `approval.key.set` to every owner and writes an audit row. + +Errors: `E_SCOPE_DENIED` (not an owner), `E_BAD_SIGNATURE` (`sig` or a +missing or wrong `prevSig`), `E_CLOCK_SKEW`, `E_UNKNOWN_OP` with `{field}`. ### `agent.add` — an owner grants access | Field | Type | Meaning | |---|---|---| -| `key` | bstr, 32 | The agent's X25519 Noise static key | +| `key` | bstr, 32 | The agent's X25519 Noise static key, from the signed offer | | `role` | text | `agent`, `support` or `release` | | `scopes` | [text] | Sorted, no repeats, within the role | | `ops` | [text] | Sorted, no repeats, each with an agent scope in `scopes` | @@ -201,10 +251,11 @@ Errors: `E_SCOPE_DENIED` (not an owner), `E_BAD_SIGNATURE`, Answer `{agent}`, the new [agent row](#agent-row). The box signs a new roster that lists it, pushes `agent.added` to every owner and writes an audit row. Errors: `E_SCOPE_DENIED` (not an owner phone), `E_NO_APPROVAL_KEY`, -`E_BAD_SIGNATURE`, `E_CAP_EXCEEDED` (`{cap, max}`, for a cap, the expiry, or -16 agent rows on the box), `E_UNAVAILABLE` (`{subsystem: "clock"}`), -`E_UNKNOWN_OP` (`{field}`). A key already paired as a phone or an agent is -`E_UNKNOWN_OP` with `{field: "key"}`. +`E_BAD_SIGNATURE`, `E_CLOCK_SKEW`, `E_CAP_EXCEEDED` (`{cap, max}`, for a +cap, the expiry, or 16 agent rows on the box), `E_UNAVAILABLE` +(`{subsystem: "clock"}`), `E_UNKNOWN_OP` (`{field}`). A key whose row id is +already taken, by a phone or an agent, is `E_UNKNOWN_OP` with +`{field: "key"}`. ### `agent.widen` — an owner changes or renews a grant @@ -213,18 +264,20 @@ row. Errors: `E_SCOPE_DENIED` (not an owner phone), `E_NO_APPROVAL_KEY`, | `id` | text | The agent row's id | | `epoch` | uint | The row's epoch as the owner saw it | | `scopes`, `ops`, `caps`, `expiresAtMs` | | The whole new grant, as in `agent.add` | -| `atMs`, `sig` | | As in `agent.add` | +| `atMs`, `sig` | | As in `agent.add`; the signature covers the row's key too | Any change other than a revoke needs a signature, narrowing included; one -rule is easier to check than two. The epoch rises. Errors as `agent.add`, -plus `E_NOT_FOUND` and `E_CONFLICT` (`{expected, actual}`) for a stale epoch. +rule is easier to check than two. The epoch rises, and the widening owner +becomes the approver. Errors as `agent.add`, plus `E_NOT_FOUND`, and +`E_CONFLICT` (`{expected, actual}`) for a stale epoch, sent with +`retryable: false`: the owner reads the row again before signing again. ### `agent.revoke` — remove a grant `{id}`. From an owner, any agent row; from an agent, its own. No signature. The row goes at once, its sessions end with `session.terminate {reason: -"revoked"}`, its pending requests are dropped, and the next roster leaves it -out. Answer `{id}`. Error: `E_NOT_FOUND`. +"revoked"}`, its holds end, its pending requests are dropped, and the next +roster leaves it out. Answer `{id}`. Error: `E_NOT_FOUND`. ### `agent.list` — who has access @@ -234,10 +287,11 @@ its own requests. A viewer gets `E_SCOPE_DENIED`. ### `agent.request` — an agent asks for a durable change -`{op, args, why}`. `args` is the op's argument map, at most 1 KiB encoded. -Answer `{reqId, expiresAtMs}`. Errors: `E_OP_NOT_GRANTED`, `E_SCOPE_DENIED`, -`E_RATE_LIMITED`, `E_CAP_EXCEEDED` (`{cap: "pending", max: 4}` per agent, -16 per box), `E_UNKNOWN_OP`. +`{op, args, why}`. `args` is the op's argument map, at most 1 KiB encoded, +within `agent_args`. Answer `{reqId, expiresAtMs}`. Errors: +`E_OP_NOT_GRANTED`, `E_SCOPE_DENIED`, `E_RATE_LIMITED`, `E_CAP_EXCEEDED` +(`{cap: "pending", max: 4}` per agent, 16 per box), `E_UNKNOWN_OP` +(`{op, arg}` for an argument). ### `agent.confirm` — an owner answers a request @@ -250,7 +304,12 @@ Answer `{reqId, expiresAtMs}`. Errors: `E_OP_NOT_GRANTED`, `E_SCOPE_DENIED`, Answer `{reqId, state, cmdId}`: `state` is `approved` or `declined`, and `cmdId` is the command the box now runs on this session. Errors: `E_NOT_FOUND` (unknown, decided or expired), `E_NO_APPROVAL_KEY`, -`E_BAD_SIGNATURE`, `E_SCOPE_DENIED`. +`E_BAD_SIGNATURE`, `E_CLOCK_SKEW`, `E_SCOPE_DENIED`. + +### `agent.decided` — the box tells an agent how a request ended + +Box to agent, unsolicited, when its session is open: `{reqId, state, cmdId, +result}`. `result` is the command's `cmd.result` body when the request ran. ### `audit.get` — what agents and owners did @@ -266,7 +325,7 @@ Answer `{reqId, state, cmdId}`: `state` is `approved` or `declined`, and | `key` | bstr, 32 | X25519 Noise static key | | `role` | text | `agent`, `support` or `release` | | `scopes`, `ops` | [text] | As granted | -| `caps` | `{holdS, maxW, perMin}` | | +| `caps` | `{holdS, maxW, perMin}` | `perMin` as the box applies it | | `expiresAtMs` | int | Wall clock | | `principal` | `{client, clientId, ticket}` | | | `approvedBy` | text | `app:` or `lan` | @@ -276,30 +335,51 @@ Answer `{reqId, state, cmdId}`: `state` is `approved` or `declined`, and ### Request `{reqId, agent, op, args, why, atMs, expiresAtMs, state}`. `state` is -`pending`, `approved`, `declined` or `expired`. +`pending`, `approved`, `declined` or `expired`. `reqId` is 16 random bytes in +base64url. ### Audit row -`{seq, atMs, actor, role, principal, by, what, target, result}`. `actor` is -the caller subject (`agent:`, `app:`, `lan:
` or `box`); -`principal` is the client or ticket; `by` is the staff id on a support call; +`{seq, atMs, actor, role, principal, by, what, target, result, count}`. +`actor` is the caller subject (`agent:`, `app:`, `lan:
` or +`box`); `principal` is the client or ticket; `by` is who made a support call; `what` is the message type or op; `result` is `ok` or the error code. +`count` folds an agent's reads: one row per agent, message and minute, with +how many there were. Grants, keys, commands and requests get a row each, +from a budget of their own. ### Reads +The registry's `reads` table names each read and the scope it needs. + | Message | Request | Answer | |---|---|---| +| `live.get` | `{}` | `live`: FTW Cloud's `live` body, with agent ids | +| `loadpoints.get` | `{}` | `loadpoints`: FTW Cloud's `lp` body, each charger and its car by agent id | +| `cars.get` | `{}` | `cars`: FTW Cloud's car class body, each car's level, source, age and goal by agent id | +| `plan.get`, `price.get` | As for a phone | `plan`, `price` | +| `hist.query` | As for a phone | `hist.chunk`, `hist.end` | | `health.get` | `{}` | `health {version, uptimeS, clock, drivers: {ok, degraded, faulted, offline}, meter: {srcState, ageMs}, dispatchBlockedBy}` | -| `events.get` | `{n}`, at most 50 | `events {events}`, each the FTW Cloud `event` body | -| `logs.get` | `{n, level}`; `n` at most 200, `level` `WARN` by default | `logs {lines: [{ts, level, src, msg}], dropped}` | +| `drivers.get` | `{}` | `drivers {drivers: [{src, kind, state, ageMs}]}` | +| `events.get` | `{n, beforeMs, afterMs}`, `n` at most 50 | `events {events, more}`, each FTW Cloud's `event` body with agent ids | +| `logs.get` | `{n, level, beforeMs, afterMs}`; `n` at most 200, `level` `WARN` by default | `logs {lines: [{ts, level, src, msg}], dropped, more}` | | `config.get` | `{section}` | `config {sections}` without a section; `config {section, doc}` with one | | `diag.run` | `{check, src}`; `check` is `clock`, `link`, `meter`, `planner` or `driver` | `diag {check, ok, facts}` | +- **Agent ids.** Every id in an answer to an agent, for a source, a charger + or a car, is the box's agent id: HMAC-SHA-256 under a key the box derives + from a secret of its own, cut to 8 base64url characters after one letter + for the kind. It is stable on one box, says nothing on another, and is not + the readable copy's id, which depends on a grant that may be off. The box + resolves an agent id in a `cmd` or an `agent.request` with the same key. +- **Cursors.** `beforeMs` asks for lines or events older than that wall time, + `afterMs` for newer ones; the answer is oldest first, and `more` says more + remain on the asked side. - Each answer fits one bulk frame (16 KiB). `logs.get` drops its oldest lines to fit and counts them in `dropped`. A config section that does not fit gets `E_RANGE_TOO_LARGE`; an unknown one `E_NOT_FOUND`. - `health` carries no readings and no names: drivers are counted, and a - source that blocks dispatch goes by an opaque id. Planner solve times, + source that blocks dispatch goes by its agent id. Planner solve times, fallbacks, refusals and plan against actual join it when the box keeps them; a field the box cannot fill is absent. - The box answers `events.get` and `diag.run` with `E_UNKNOWN_OP` until it @@ -310,37 +390,43 @@ the caller subject (`agent:`, `app:`, `lan:
` or `box`); `logs.get` and `config.get` build their answer on the box. Nothing leaves it unredacted, and nothing is stored in the cloud. -- **Logs.** The box keeps the time, the level, the message and, for a - driver's line, the driver's opaque source id in place of its name. It - replaces every name the configuration knows (site, drivers, devices, - loadpoints, vehicles), and removes IP and MAC addresses, host names, URLs, - e-mail addresses, quoted text, serial-like words (letters and digits mixed, - six or more), runs of seven or more digits, and anything that looks like a - credential: bearer and basic headers, secret-named keys and long tokens. A - line's attributes keep their keys; a value stays only when it is a number, - a boolean, a duration or a short lowercase word, and is otherwise replaced - by `[omitted]`. At most 200 lines, in one bulk frame. +- **Logs.** The box keeps the time, the level and the box's own message + text, scrubbed. A driver's free text never leaves: its line keeps the + level, the driver's agent id and the attributes the allowlist below + keeps. Text is scrubbed of every name the configuration and the car store + know (site, drivers, devices, chargers, cars, VINs, identifiers, sources), + IP and MAC addresses, host names, URLs, e-mail addresses, quoted text, + serial-like words (letters and digits mixed, six or more), runs of seven or + more digits, and anything that looks like a credential: bearer and basic + headers, secret-named keys and long tokens. +- **Attributes.** A line's attributes keep only keys on the box's + allowlist. A value survives when its key is allowed and the value is a + flag, a duration, a short lowercase code word, or a number for a key the + allowlist marks numeric. So coordinates, phone numbers and energy totals + under any other key do not leave. - **Config.** Every secret-named key is replaced by `***`. Names become - opaque ids. Location, addresses, host names, URLs, serials, MAC addresses, - vehicle ids, e-mail addresses and notification targets are removed. + agent ids. Location, addresses, host names, URLs, serials, MAC addresses, + vehicle and car ids, VINs, e-mail addresses and notification targets are + removed. +- **Vectors.** `go/protocol/testdata/redaction-vectors.json` holds lines in + and out, so a change to the rules shows. -Redaction is a list of patterns, so text a driver writes in a shape none of -them matches can pass. Tests hold the cases above; a driver that logs -something new needs a new case. +Redaction is a list of patterns, so text in a shape none of them matches can +pass. That is why driver free text stays home. ## The agent's roster entry The roster the box signs for FTW Cloud lists each agent row as a `Device` -with one extra map, `agent`: +with one extra map, `agent`, and carries the box's Noise key in `noise`: | Field | Type | Meaning | |---|---|---| | `id` | text | The row's id | | `key` | bstr, 32 | X25519 Noise static key | | `role` | text | `agent`, `support` or `release` | -| `scopes` | [text] | The readable copy's filter, as for a phone | +| `scopes` | [text] | Empty: an agent reads the box, never the readable copy | | `epoch` | uint | | -| `tun` | bool | Always true for a live agent row | +| `tun` | bool | False: no door admits an agent row; only the `keys` part opens its session | | `agent.scopes`, `agent.ops` | [text] | The grant, at the approver's scopes now | | `agent.caps` | `{holdS, maxW, perMin}` | | | `agent.expiresAtMs` | int | Wall clock | @@ -349,29 +435,34 @@ with one extra map, `agent`: - The box leaves out a row that has expired by its clock. While its clock is `none`, it lists rows as they are and refuses their calls. - FTW Cloud must stop admitting a row at `expiresAtMs` by its own clock, - without waiting for a roster. It must never admit an agent row through the - relay, which an agent never uses, and it may tighten caps but never loosen - them. + without waiting for a roster. It must never admit an agent row on + `/v1/app`, `/v1/app/once` or the relay, and it may tighten caps but never + loosen them. ## Agents use the tunnel only -An agent's session reaches the box through FTW Cloud as `tun`. The relay -refuses it: a handshake over the relay from an agent's key ends as from a -stranger. The watch exchange refuses it too. +An agent's session reaches the box through FTW Cloud as `tun`, opened by the +`keys` part. The relay refuses it: a handshake over the relay from an agent's +key ends as from a stranger. The watch exchange refuses it too. -## Expiry and revoke +## Expiry, revoke and the clock - **Expiry is wall clock.** The box checks it at the handshake, on every call and once a second for an open session. An expired row ends its session with `session.terminate {reason: "expired"}`, answers its next - call with `E_GRANT_EXPIRED` and leaves the roster. A sweep removes it and - writes an audit row. + call with `E_GRANT_EXPIRED`, loses its holds and leaves the roster. A sweep + removes it and writes an audit row. - **No clock, no agents.** While the box clock is `none` (NTP has not synchronised it), every call from an agent gets `E_UNAVAILABLE` with `{subsystem: "clock"}`, and `agent.add` and `agent.widen` are refused the same way. Owners' phones are not affected. -- **Revoke is immediate.** The row goes, the sessions end, and the next call - fails with `E_GRANT_REVOKED`, whatever the cloud admits. +- **No going back.** The box keeps the highest wall time it has seen on disk. + A clock below it counts as `none` for agents, so setting the clock back + cannot revive an expired grant. +- **Revoke is immediate.** The row goes, the sessions end, the holds end, + and the next call fails with `E_GRANT_REVOKED`, whatever the cloud admits. +- **A warning first.** A day before a grant runs out, the box pushes + `agent.expiring` to every owner. ## The approval signature @@ -387,9 +478,10 @@ check. and `approval.key.set` itself as proof of possession. `agent.revoke` and a decline need no signature. - **The bytes.** The signature is ECDSA P-256 with SHA-256 over the - deterministic CBOR (RFC 8949, section 4.2.1) of one array, encoded `r ‖ s` - in 64 bytes. CryptoKit's `signature(for:)` hashes the bytes itself, so the - phone passes the array's bytes, not their digest. + deterministic CBOR (RFC 8949, section 4.2.1, floats in their shortest + exact form) of one array, encoded `r ‖ s` in 64 bytes. CryptoKit's + `signature(for:)` hashes the bytes itself, so the phone passes the array's + bytes, not their digest. ``` ["ftw.approval.v1", what, boxKey, deviceId, atMs, ...fields] @@ -399,23 +491,31 @@ check. |---|---| | `approval.key.set` | `pub` | | `agent.add` | `key, role, scopes, ops, [holdS, maxW, perMin], expiresAtMs, client, clientId, ticket` | - | `agent.widen` | `id, epoch, scopes, ops, [holdS, maxW, perMin], expiresAtMs` | - | `agent.confirm` | `reqId` | + | `agent.widen` | `id, key, epoch, scopes, ops, [holdS, maxW, perMin], expiresAtMs` | + | `agent.confirm` | `reqId, agent, op, argsHash` | `boxKey` is the box's X25519 static key (32 bytes, as in the QR code), so a signature for one box is worth nothing at another. `deviceId` is the - signing phone's id, and the box checks it is the session's. Lists are - sorted with no repeats, empty text is `""`, and integers take their - shortest form. -- **Freshness.** `atMs` must be within 10 minutes of the box's wall clock, - and the box keeps each signature it accepted for 20 minutes and refuses it - a second time. A replayed `agent.confirm` finds no pending request; a - replayed `agent.widen` names an old epoch. + signing phone's id, and the box checks it is the session's. In + `agent.widen`, `key` is the row's whole key from `agent.list`. In + `agent.confirm`, `agent` and `op` are the request's and `argsHash` is + SHA-256 over the deterministic CBOR of the request's `args` as the phone + received and showed them. Lists are sorted with no repeats, empty text is + `""`, and integers take their shortest form. +- **Freshness.** `atMs` must be within 10 minutes of the box's wall clock; + outside it the box answers `E_CLOCK_SKEW {boxMs}`, and the phone may sign + again with the box's time. An `atMs` from before the box last started is + refused, because the box remembers what it took only since then. It keeps + the SHA-256 of each signed array it accepted for 20 minutes and refuses + the same bytes again, whatever the signature looks like. - **What it proves.** Someone passed Face ID on that phone and approved exactly these bytes. It does not stop a modified app on an enrolled owner - phone from registering a new key of its own: that app could already send - commands. It stops a phone left unlocked on a table, and it lets the box - check approval without trusting the app or the cloud. + phone that registers a key of its own while the phone has none: that app + could already send commands. Once a phone has a key, replacing it needs the + old key or the house password. It stops a phone left unlocked on a table, + and it lets the box check approval without trusting the app or the cloud. + With `api.lan_auth` off, anyone on the home network can make an owner + code and pair an owner phone; the house password is what closes that. ## Approval on the box page @@ -427,18 +527,27 @@ above and its approval key, and an agent can never reach them. |---|---| | `GET /api/agents` | A client on the LAN. Rows, requests and keys | | `GET /api/agents/audit?before=&n=` | A client on the LAN | -| `POST /api/agents {offer, scopes, ops, caps, ttlS}` | The box itself, or a LAN client signed in with the house password | +| `POST /api/agents {offer, scopes, ops, caps, ttlS}` | A LAN client signed in with the house password | | `POST /api/agents/{id}/widen {epoch, scopes, ops, caps, ttlS}` | The same | | `POST /api/agent-requests/{reqId} {approve: true}` | The same | +| `POST /api/agents/approval-key {deviceId, pub}` | The same: a phone that lost its key | | `POST /api/agent-requests/{reqId} {approve: false}` | A client on the LAN | | `DELETE /api/agents/{id}` | A client on the LAN | -`offer` is the [grant offer](#the-grant-offer) as the consent page shows -it. The owner may grant less: `scopes`, `ops`, `caps` and `ttlS` replace the -offer's when given. The box refuses an offer for another home id. - -Widening needs the house password because the LAN sign-in is otherwise -nothing at all. What the box has today: +- `offer` is the [signed offer](#the-grant-offer), base64url. The box checks + its signature against the offer keys built into it and refuses one that is + unsigned, expired, or for another home. The page gets it from the owner: + the owner types the consent page's code, and the page, in the owner's + browser, fetches the signed offer from FTW Cloud's code lookup and posts + it here. The owner may grant less: `scopes`, `ops`, `caps` and `ttlS` + replace the offer's when given. +- **Every route that widens access needs the house password,** from any + address, loopback included: a driver's Lua and the session passthrough can + both reach the box from inside it. +- **Drivers never reach the box.** A driver's HTTP request to a loopback + address, or to an address of the box itself, is refused. + +What the sign-in is worth today: - **Off by default.** With `api.lan_auth` off, which is the default, every client on the home network is an owner with no sign-in. Granting a remote @@ -453,8 +562,7 @@ nothing at all. What the box has today: - **What it lacks.** The page is plain HTTP, so anyone who can read the home network's traffic can read the password and the cookie. There is one shared password and no person behind it, so the audit row names the - address. Requests from the box itself (loopback) need no password, since - whoever can run code on the box already owns it. + address. Narrowing stays open to any LAN client, as `DELETE /api/cloud/grant` does, because removing access is safe. @@ -462,43 +570,71 @@ because removing access is safe. ## The grant offer The MCP consent page shows a short code, a QR code and a universal link. All -three carry one offer, which the app shows the owner before Face ID. It is a -CBOR map, base64url without padding, in the link's fragment: +three carry one signed offer, which the app shows the owner before Face ID. + +**The signed offer** is CBOR `{o, kid, sig}`, base64url without padding in +the link's fragment, and what FTW Cloud's code lookup returns for a code: + +- `o` is the deterministic CBOR of the offer below; +- `sig` is ECDSA P-256 with SHA-256 over the deterministic CBOR of + `["ftw.offer.v1", o]`, `r ‖ s`, by FTW Cloud's offer key named `kid`. + +The app and the box pin the offer keys, as they pin the service key, and +refuse an offer no pinned key signed. A build that pins none opens no offer. | Field | Type | Meaning | |---|---|---| | `v` | uint | 1 | -| `home` | text | The home id | +| `home` | text | Empty: the owner picks the home | | `key` | bstr, 32 | The agent's X25519 key, made by FTW Cloud's `keys` part | | `role` | text | `agent`, `support` or `release` | -| `client` | text | The client's name, from its metadata document | +| `client` | text | The name the client gives itself | | `clientId` | text | The client id | +| `clientHost` | text | The host of the client's metadata document or redirect URI | +| `verified` | bool | FTW Cloud knows the client from its own list | | `scopes`, `ops` | [text] | What the client asks for | | `caps` | `{holdS, maxW, perMin}` | Proposed caps | | `ttlS` | uint | Proposed length | -| `ticket` | text | The ticket id, for `support` | -| `code` | text | The code on the consent page, for the owner to compare | - -The owner may grant less than the offer asks. FTW Cloud learns the outcome -from the roster: the grant is whatever the roster lists for that key. +| `ticket` | text | The ticket id, for `support`; empty otherwise | +| `code` | text | The code on the consent page | +| `exp` | int | Wall-clock ms when the offer stops being good, at most 10 minutes after FTW Cloud made it | + +- **The app** shows `client`, `clientHost` and whether it is `verified`. On + the universal-link path the owner types the code the consent page shows, + so a link sent by someone else does not reach Face ID; on the QR path the + owner compares it. The app picks the home the owner chooses, asks when + there are several, and refuses a home it does not have. +- **Support** offers count only from `clientId` + `https://cloud.ftw.energy/clients/sourceful-support`, the support tooling's + client at FTW Cloud. The app and the box refuse a support offer from any + other client. +- **The box** takes an offer whose `home` is empty or its own. +- The owner may grant less than the offer asks. FTW Cloud learns the outcome + from the roster: the grant is whatever the roster lists for that key. ## Push kinds - `agent.added` goes to every owner when an agent row is added, as `cloud.granted` does: access from outside is news every owner should hear. - `agent.request` goes to every owner when an agent asks for a durable change. +- `agent.expiring` goes to every owner a day before a grant runs out. +- `approval.key.set` goes to every owner when a phone registers or replaces + its approval key. +- `owner.added` goes to every owner when a phone pairs as an owner. -Both travel as events. With the readable copy off, or without events in it, -FTW Cloud carries no events, so an owner learns of a request when the app -next opens. That gap is open. +Today these travel as events, and with the readable copy off, or without +events in it, FTW Cloud carries no events. `agent.added`, +`approval.key.set` and `owner.added` are to go as notices that carry no data, +whenever the link is up, copy or not; that is FTW Cloud protocol work still +to come. ## The audit log The box writes a row for every call an agent makes and for every change to -an agent grant or an approval key, whoever makes it. Rows live in the box's -state store, at most 10,000 and at most 90 days. An owner reads them with -`audit.get` or on the box page. FTW Cloud keeps its own log of what it -forwarded; neither replaces the other. +an agent grant or an approval key, whoever makes it, and folds an agent's +reads by the minute. Rows live in the box's state store, at most 10,000 and +at most 90 days. An owner reads them with `audit.get` or on the box page. +FTW Cloud keeps its own log of what it forwarded; neither replaces the other. ## Numbers in one place @@ -507,15 +643,18 @@ forwarded; neither replaces the other. | Longest grant | `agent` 30 days, `support` 14 days, `release` 90 days | | Agent rows per box | 16 | | `holdS` | 60 to 1,800 s | -| `maxW` | 1 to 100,000 W | +| `maxW` | 1 to 100,000 W, either direction | | `perMin` | 1 to 60, default 6 | | Reads per agent | 60 a minute | | Pending requests | 4 per agent, 16 per box | +| Request id | 16 random bytes | | Request lifetime | 12 hours; kept 24 hours after it ends | | `agent.request` args, `why` | 1 KiB, 280 bytes | | Approval `atMs` window | 10 minutes either way | -| Signature replay memory | 20 minutes | +| Signature replay memory | 20 minutes, since the box started | +| Signed offer life | 10 minutes | | `logs.get` | 200 lines, one 16 KiB frame | | `events.get` | 50 events | | `audit.get` | 200 rows a page; 10,000 rows and 90 days kept | | `by` on a support call | 64 bytes | +| `agent.expiring` | A day before the expiry | diff --git a/docs/protocol-cloud.md b/docs/protocol-cloud.md index 64ad96a0b..ad2ffae02 100644 --- a/docs/protocol-cloud.md +++ b/docs/protocol-cloud.md @@ -434,6 +434,7 @@ The service never forwards these to a phone. | `devices` | [Device] | Every device paired with the box | | `grant` | Grant | What the owner granted | | `pending` | [Pending] | The pairing codes the box shows now, at most one | +| `noise` | bstr, 32 B | The box's X25519 Noise static key, the one in its pairing QR code. FTW Cloud's `keys` part opens an agent's session to it, and trusts it only as signed here | **Device** @@ -442,9 +443,9 @@ The service never forwards these to a phone. | `id` | text | The box's device id | | `key` | bstr, 32 B | The device's X25519 Noise static key | | `role` | text | `owner`, `viewer` or `watch`; for an agent row `agent`, `support` or `release` | -| `scopes` | [text] | Scopes the box derives from the role. For a watch, only those its phone's role also carries now. The service holds no role table | +| `scopes` | [text] | Scopes the box derives from the role. For a watch, only those its phone's role also carries now. Empty for an agent row: an agent reads the box, never the copy. The service holds no role table | | `epoch` | uint | The device's epoch on the box | -| `tun` | bool | The device may open a session to the box through the service. True for a phone and a live agent row, false for a watch. It needs no grant | +| `tun` | bool | The device may open a session to the box through the service's doors. True for a phone, false for a watch and for an agent row. It needs no grant | | `agent` | map, optional | Only on an agent row: its grant, below. See [Agents](agents.md) | **Agent** @@ -457,8 +458,13 @@ The service never forwards these to a phone. | `expiresAtMs` | int | Wall clock. The service stops admitting the row then by its own clock, without waiting for a roster | | `principal` | map | `client`, `clientId` and `ticket`, below | -The service must never admit an agent row through the relay, and may tighten -its caps but never loosen them. The box checks all of it again on every call. +**Who may open an agent's session.** Only the service's own `keys` part, the +one place that holds agent keys, opens a session for an agent row, and only +for a call through MCP that the agent's OAuth token allows. The service must +never admit an agent row on `/v1/app`, `/v1/app/once` or the relay, whatever +its `tun` says, and an agent row never reads the readable copy. It may +tighten the caps but never loosen them. The box checks everything again on +every call. **Caps** @@ -1165,8 +1171,10 @@ copied them here and to the app. | `agent`, `support`, `release` | Roles for agent rows | `registry.yaml`, `roles` | | `ftw.logs.read`, `ftw.config.read`, `ftw.diag.run`, `ftw.dispatch.hold`, `ftw.goals.request`, `ftw.update.request` | Agent scopes | `registry.yaml`, `scopes` | | `agent` on each op | The scope that opens an op to an agent | `registry.yaml`, `ops` | -| `E_GRANT_EXPIRED`, `E_OP_NOT_GRANTED`, `E_CAP_EXCEEDED`, `E_RATE_LIMITED`, `E_NEEDS_OWNER`, `E_BAD_SIGNATURE`, `E_NO_APPROVAL_KEY`, `E_NOT_FOUND` | Agents' refusals | `registry.yaml`, `errors` | -| `agent.added`, `agent.request` | Push kinds, sent to every owner | `push-catalogue.yaml` | +| `agent_args` | What an agent may put in each op, with a label for each argument | `registry.yaml`, new block | +| `reads` | The reads an agent may send and the scope each needs | `registry.yaml`, new block | +| `E_GRANT_EXPIRED`, `E_OP_NOT_GRANTED`, `E_CAP_EXCEEDED`, `E_RATE_LIMITED`, `E_NEEDS_OWNER`, `E_BAD_SIGNATURE`, `E_NO_APPROVAL_KEY`, `E_NOT_FOUND`, `E_CLOCK_SKEW` | Agents' refusals | `registry.yaml`, `errors` | +| `agent.added`, `agent.request`, `agent.expiring`, `approval.key.set`, `owner.added` | Push kinds, sent to every owner | `push-catalogue.yaml` | Class names, field names, close codes and the signing tags are not registry names. They live here and in `go/protocol`, held by golden vectors in both diff --git a/go/internal/appproto/gencontract/gencontract.go b/go/internal/appproto/gencontract/gencontract.go index a6b0eaafe..8d1e84029 100644 --- a/go/internal/appproto/gencontract/gencontract.go +++ b/go/internal/appproto/gencontract/gencontract.go @@ -59,7 +59,25 @@ type Registry struct { // with FTW Cloud, and what for. CloudScopes []string `yaml:"cloud_scopes"` CloudPurposes []string `yaml:"cloud_purposes"` - Resolutions map[string]struct { + // AgentArgs is what an agent may put in each op it can name, and + // Reads the reads it may send with the scope each needs. + AgentArgs map[string][]struct { + Name string `yaml:"name"` + Kind string `yaml:"kind"` + Unit string `yaml:"unit"` + Min *float64 `yaml:"min"` + Max *float64 `yaml:"max"` + Values []string `yaml:"values"` + Required bool `yaml:"required"` + Cap string `yaml:"cap"` + Label string `yaml:"label"` + } `yaml:"agent_args"` + Reads []struct { + Msg string `yaml:"msg"` + Scope string `yaml:"scope"` + Desc string `yaml:"desc"` + } `yaml:"reads"` + Resolutions map[string]struct { TileSpanMs int64 `yaml:"tile_span_ms"` RetentionDays int `yaml:"retention_days"` Source string `yaml:"source"` @@ -98,6 +116,8 @@ func Generate(raw []byte) ([]byte, error) { writeRoleNames(&b, reg) writeCloud(&b, reg) writeOps(&b, reg) + writeAgentArgs(&b, reg) + writeReads(&b, reg) writeErrors(&b, reg) writeSourceStates(&b, reg) writeResolutions(&b, reg) @@ -336,6 +356,48 @@ func writeOps(b *bytes.Buffer, reg Registry) { b.WriteString("}\n\n") } +// writeAgentArgs emits what an agent may put in each op, as data. +func writeAgentArgs(b *bytes.Buffer, reg Registry) { + ops := make([]string, 0, len(reg.AgentArgs)) + for op := range reg.AgentArgs { + ops = append(ops, op) + } + sort.Strings(ops) + b.WriteString("// RegistryAgentArgs is what an agent may put in each op it can name. The\n") + b.WriteString("// box refuses any other key, kind or range, in a cmd and in an\n") + b.WriteString("// agent.request, as it arrives.\n") + b.WriteString("var RegistryAgentArgs = map[string][]AgentArg{\n") + for _, op := range ops { + fmt.Fprintf(b, "\t%q: {\n", op) + for _, a := range reg.AgentArgs[op] { + fmt.Fprintf(b, "\t\t{Name: %q, Kind: %q, Unit: %q", a.Name, a.Kind, a.Unit) + if a.Min != nil { + fmt.Fprintf(b, ", Min: bound(%v)", *a.Min) + } + if a.Max != nil { + fmt.Fprintf(b, ", Max: bound(%v)", *a.Max) + } + if len(a.Values) > 0 { + fmt.Fprintf(b, ", Values: %#v", a.Values) + } + fmt.Fprintf(b, ", Required: %t, Cap: %q, Label: %q},\n", a.Required, a.Cap, a.Label) + } + b.WriteString("\t},\n") + } + b.WriteString("}\n\n") +} + +// writeReads emits each read an agent may send with the scope it needs. +func writeReads(b *bytes.Buffer, reg Registry) { + b.WriteString("// RegistryReads maps each read an agent may send to the scope it needs.\n") + b.WriteString("var RegistryReads = map[string]string{\n") + for _, r := range reg.Reads { + fmt.Fprintf(b, "\t// %s — %s.\n", r.Msg, r.Desc) + fmt.Fprintf(b, "\t%q: %q,\n", r.Msg, r.Scope) + } + b.WriteString("}\n\n") +} + // writeRoles emits the role table with '*' expanded. // // Expanded here and not at the call site, because a star that has to be diff --git a/go/protocol/agents.go b/go/protocol/agents.go index 4e7a7066d..4d104ed63 100644 --- a/go/protocol/agents.go +++ b/go/protocol/agents.go @@ -8,8 +8,18 @@ import ( "fmt" "math/big" "slices" + "strings" + + "github.com/fxamacker/cbor/v2" ) +// strictDec decodes a signed body: a key it does not know, or a key twice, +// is a body the box will not sign off on. +var strictDec, _ = cbor.DecOptions{ + DupMapKey: cbor.DupMapKeyEnforcedAPF, + ExtraReturnErrors: cbor.ExtraDecErrorUnknownField, +}.DecMode() + // Agents: grants an owner gives to an assistant, to Sourceful support for one // ticket, or to the release check. docs/agents.md is the normative text; this // file holds the shapes and the approval signature's bytes, so FTW Cloud and @@ -25,7 +35,9 @@ const ( MsgAgentRequest = "agent.request" MsgAgentConfirm = "agent.confirm" MsgAgentOK = "agent.ok" - MsgAuditGet = "audit.get" + // MsgAgentDecided tells an agent's open session how its request ended. + MsgAgentDecided = "agent.decided" + MsgAuditGet = "audit.get" MsgHealthGet = "health.get" MsgHealth = "health" @@ -37,6 +49,18 @@ const ( MsgConfig = "config" MsgDiagRun = "diag.run" MsgDiag = "diag" + + // The typed reads, whose answers name nothing. live, loadpoints and + // cars carry FTW Cloud's class bodies (cloudwire.Live, LP and Cars) + // with the box's agent ids in place of the copy's. + MsgLiveGet = "live.get" + MsgLive = "live" + MsgLoadpointsGet = "loadpoints.get" + MsgLoadpoints = "loadpoints" + MsgCarsGet = "cars.get" + MsgCars = "cars" + MsgDriversGet = "drivers.get" + MsgDrivers = "drivers" ) // TerminateExpired ends an agent's session when its grant runs out. @@ -94,6 +118,10 @@ const ( AuditDaysKept = 90 // ByMax bounds the staff id a support call carries. ByMax = 64 + // ReqIDBytes is a request id's randomness: 128 bits. + ReqIDBytes = 16 + // OfferTTLMs is the longest a signed offer may live. + OfferTTLMs int64 = 10 * 60 * 1000 // PrincipalFieldMax bounds each principal field. PrincipalFieldMax = 256 ) @@ -137,6 +165,9 @@ type ApprovalKeySet struct { Pub []byte `cbor:"pub"` AtMs int64 `cbor:"atMs"` Sig []byte `cbor:"sig"` + // PrevSig is the phone's current key's signature over the same bytes. + // Replacing a key needs it. + PrevSig []byte `cbor:"prevSig,omitempty"` } // AgentAdd grants access. @@ -166,21 +197,87 @@ type AgentWiden struct { // GrantOffer is what FTW Cloud's consent page offers the owner: the agent's // key and the rights its client asks for (docs/agents.md, The grant offer). -// It travels as CBOR, base64url without padding, in a link's fragment. The -// owner may grant less than it asks. +// It travels signed, as SignedOffer. The owner may grant less than it asks. type GrantOffer struct { - V uint64 `cbor:"v"` - Home string `cbor:"home"` - Key []byte `cbor:"key"` - Role string `cbor:"role"` - Client string `cbor:"client"` - ClientID string `cbor:"clientId"` - Scopes []string `cbor:"scopes"` - Ops []string `cbor:"ops"` - Caps Caps `cbor:"caps"` - TTLS uint64 `cbor:"ttlS"` - Ticket string `cbor:"ticket,omitempty"` - Code string `cbor:"code"` + V uint64 `cbor:"v"` + // Home is empty: the owner picks the home in the app or on the box page. + // A box takes an offer whose home is empty or its own. + Home string `cbor:"home"` + Key []byte `cbor:"key"` + Role string `cbor:"role"` + // Client is the name the client gives itself. ClientHost is the host of + // its metadata document or redirect URI, and Verified says FTW Cloud + // knows the client by its own list. The app shows all three. + Client string `cbor:"client"` + ClientID string `cbor:"clientId"` + ClientHost string `cbor:"clientHost"` + Verified bool `cbor:"verified"` + Scopes []string `cbor:"scopes"` + Ops []string `cbor:"ops"` + Caps Caps `cbor:"caps"` + TTLS uint64 `cbor:"ttlS"` + Ticket string `cbor:"ticket"` + // Code is what the consent page shows, for the owner to type or compare. + Code string `cbor:"code"` + // ExpMs is when the offer stops being good, wall clock, at most + // OfferTTLMs after FTW Cloud made it. + ExpMs int64 `cbor:"exp"` +} + +// SignedOffer is an offer as it travels: O is the offer's deterministic +// CBOR, Sig FTW Cloud's offer key's signature over OfferBytes(O), and Kid +// names that key. It goes base64url, without padding, in a link's fragment. +type SignedOffer struct { + O []byte `cbor:"o"` + Kid string `cbor:"kid"` + Sig []byte `cbor:"sig"` +} + +// OfferTag starts what an offer key signs. +const OfferTag = "ftw.offer.v1" + +// SupportClientID is the one client a support offer may come from: the +// support tooling's client at FTW Cloud. +const SupportClientID = "https://cloud.ftw.energy/clients/sourceful-support" + +// Errors from reading a signed offer. +var ( + ErrOfferSignature = errors.New("protocol: the offer is not signed by a pinned offer key") + ErrOfferExpired = errors.New("protocol: the offer has expired") + ErrOfferShape = errors.New("protocol: the offer is malformed") +) + +// OfferBytes is what an offer key signs: ["ftw.offer.v1", o]. +func OfferBytes(o []byte) ([]byte, error) { + return encMode.Marshal([]any{OfferTag, o}) +} + +// OpenOffer checks a signed offer against pinned offer keys (kid → SEC1 +// P-256 point) and the wall clock, and returns the offer. A support offer +// must come from SupportClientID. +func OpenOffer(keys map[string][]byte, so SignedOffer, nowMs int64) (GrantOffer, error) { + pub, ok := keys[so.Kid] + if !ok { + return GrantOffer{}, ErrOfferSignature + } + msg, err := OfferBytes(so.O) + if err != nil { + return GrantOffer{}, ErrOfferShape + } + if VerifyApproval(pub, msg, so.Sig) != nil { + return GrantOffer{}, ErrOfferSignature + } + var o GrantOffer + if err := strictDec.Unmarshal(so.O, &o); err != nil || o.V != GrantOfferVersion || len(o.Key) != 32 { + return GrantOffer{}, ErrOfferShape + } + if nowMs >= o.ExpMs || o.ExpMs > nowMs+OfferTTLMs { + return GrantOffer{}, ErrOfferExpired + } + if o.Role == RoleSupport && o.ClientID != SupportClientID { + return GrantOffer{}, ErrOfferShape + } + return o, nil } // GrantOfferVersion is GrantOffer.V. @@ -191,6 +288,23 @@ type AgentRevoke struct { ID string `cbor:"id"` } +// AgentArg is one argument an agent may put in an op, from the registry's +// agent_args. Min and Max bound a number; Cap names the grant's cap that +// bounds it as well. +type AgentArg struct { + Name string + Kind string + Unit string + Min *float64 + Max *float64 + Values []string + Required bool + Cap string + Label string +} + +func bound(v float64) *float64 { return &v } + // AgentRequest is an agent asking for a durable change. type AgentRequest struct { Op string `cbor:"op"` @@ -224,6 +338,15 @@ type ApprovalKeyInfo struct { SetAtMs int64 `cbor:"setAtMs" json:"setAtMs"` } +// AgentDecided is how a request ended, sent to the agent's open session. +// Result is the command's outcome when the request ran. +type AgentDecided struct { + ReqID string `cbor:"reqId"` + State string `cbor:"state"` + CmdID string `cbor:"cmdId,omitempty"` + Result *CmdResult `cbor:"result,omitempty"` +} + // AgentList is agent.ok's body for agent.list. An agent sees its own row. type AgentList struct { Agents []AgentRow `cbor:"agents" json:"agents"` @@ -248,6 +371,8 @@ type AuditRow struct { What string `cbor:"what" json:"what"` Target string `cbor:"target" json:"target"` Result string `cbor:"result" json:"result"` + // Count folds an agent's reads: how many of what in that minute. + Count uint64 `cbor:"count" json:"count"` } // AuditPage is agent.ok's body for audit.get. @@ -256,10 +381,41 @@ type AuditPage struct { More bool `cbor:"more" json:"more"` } -// LogsGet asks for a redacted log excerpt. +// LogsGet asks for a redacted log excerpt: lines older than BeforeMs, or +// newer than AfterMs, newest first up to N. type LogsGet struct { - N uint64 `cbor:"n,omitempty"` - Level string `cbor:"level,omitempty"` + N uint64 `cbor:"n,omitempty"` + Level string `cbor:"level,omitempty"` + BeforeMs int64 `cbor:"beforeMs,omitempty"` + AfterMs int64 `cbor:"afterMs,omitempty"` +} + +// EventsGet asks for recent events, with the same cursors as LogsGet. +type EventsGet struct { + N uint64 `cbor:"n,omitempty"` + BeforeMs int64 `cbor:"beforeMs,omitempty"` + AfterMs int64 `cbor:"afterMs,omitempty"` +} + +// Events is the answer to events.get: FTW Cloud's event bodies, oldest +// first. More says older events remain. +type Events struct { + Events []cbor.RawMessage `cbor:"events"` + More bool `cbor:"more"` +} + +// DriverState is one driver in drivers.get, by its opaque source id. +type DriverState struct { + Src string `cbor:"src"` + Kind string `cbor:"kind"` + State string `cbor:"state"` + // AgeMs is the time since its last good reading, or -1 for never. + AgeMs int64 `cbor:"ageMs"` +} + +// Drivers is the answer to drivers.get. +type Drivers struct { + Drivers []DriverState `cbor:"drivers"` } // LogLine is one redacted line. Src is an opaque source id for a driver's @@ -271,11 +427,27 @@ type LogLine struct { Msg string `cbor:"msg"` } -// Logs is the answer to logs.get. Dropped counts lines left out to stay -// within the limits. +// Logs is the answer to logs.get, oldest first. Dropped counts lines left +// out to fit one frame; More says older lines remain. type Logs struct { Lines []LogLine `cbor:"lines"` Dropped uint64 `cbor:"dropped"` + More bool `cbor:"more"` +} + +// ValidBy says whether a support call's by is well formed: staff: for a +// person or bot: for Sourceful's own tooling. +func ValidBy(by string) bool { + kind, id, ok := strings.Cut(by, ":") + if !ok || (kind != "staff" && kind != "bot") || id == "" || len(by) > ByMax { + return false + } + for _, c := range id { + if !(c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z' || c >= '0' && c <= '9' || strings.ContainsRune("._@-", c)) { + return false + } + } + return true } // -------------------------------------------------------------------------- @@ -345,15 +517,36 @@ func AddBytes(f SignedFor, m AgentAdd) ([]byte, error) { capsArray(m.Caps), m.ExpiresAtMs, m.Principal.Client, m.Principal.ClientID, m.Principal.Ticket) } -// WidenBytes is what agent.widen signs. -func WidenBytes(f SignedFor, m AgentWiden) ([]byte, error) { - return ApprovalBytes(MsgAgentWiden, f, m.AtMs, m.ID, m.Epoch, emptyIfNil(m.Scopes), emptyIfNil(m.Ops), +// WidenBytes is what agent.widen signs. key is the row's whole key, which +// the phone read from agent.list: an id and an epoch alone could name +// another row that took the same id. +func WidenBytes(f SignedFor, m AgentWiden, key []byte) ([]byte, error) { + return ApprovalBytes(MsgAgentWiden, f, m.AtMs, m.ID, key, m.Epoch, emptyIfNil(m.Scopes), emptyIfNil(m.Ops), capsArray(m.Caps), m.ExpiresAtMs) } -// ConfirmBytes is what agent.confirm signs to approve. -func ConfirmBytes(f SignedFor, m AgentConfirm) ([]byte, error) { - return ApprovalBytes(MsgAgentConfirm, f, m.AtMs, m.ReqID) +// ConfirmBytes is what agent.confirm signs to approve: the request, the +// agent that asked, the op and the hash of its args, as the phone showed +// them. +func ConfirmBytes(f SignedFor, m AgentConfirm, req Request) ([]byte, error) { + sum, err := ArgsHash(req.Args) + if err != nil { + return nil, err + } + return ApprovalBytes(MsgAgentConfirm, f, m.AtMs, m.ReqID, req.Agent, req.Op, sum) +} + +// ArgsHash is SHA-256 over the deterministic CBOR of a request's args. +func ArgsHash(args map[string]any) ([]byte, error) { + if args == nil { + args = map[string]any{} + } + raw, err := encMode.Marshal(args) + if err != nil { + return nil, fmt.Errorf("protocol: encode args: %w", err) + } + sum := sha256.Sum256(raw) + return sum[:], nil } // ParseApprovalKey reads a SEC1 uncompressed P-256 public key. diff --git a/go/protocol/agents_test.go b/go/protocol/agents_test.go index 2d68327f9..a922b3f2d 100644 --- a/go/protocol/agents_test.go +++ b/go/protocol/agents_test.go @@ -12,6 +12,7 @@ import ( "math/big" "os" "path/filepath" + "strings" "testing" ) @@ -27,14 +28,30 @@ type approvalVectors struct { BoxKey string `json:"boxKeyHex"` DeviceID string `json:"deviceId"` Cases []approvalVector `json:"cases"` + Offer offerVector `json:"offer"` } type approvalVector struct { - What string `json:"what"` - BodyHex string `json:"bodyHex"` - SignedHex string `json:"signedHex"` - SHA256Hex string `json:"sha256Hex"` - SigHex string `json:"sigHex"` + What string `json:"what"` + BodyHex string `json:"bodyHex"` + // ContextHex is what the box adds from its own records: the row's key + // for agent.widen, the stored request (CBOR) for agent.confirm. + ContextHex string `json:"contextHex,omitempty"` + SignedHex string `json:"signedHex"` + SHA256Hex string `json:"sha256Hex"` + SigHex string `json:"sigHex"` +} + +// offerVector is one signed offer: the link fragment's CBOR, what the offer +// key signed, and the key. +type offerVector struct { + Note string `json:"note"` + Kid string `json:"kid"` + PubHex string `json:"pubHex"` + NowMs int64 `json:"nowMs"` + SignedHex string `json:"signedOfferHex"` + OHex string `json:"oHex"` + BytesHex string `json:"signedBytesHex"` } const approvalVectorsPath = "testdata/approval-vectors.json" @@ -82,6 +99,16 @@ func vectorAgentKey() []byte { return key } +// contexts is what the box adds to each signed message from its records. +var contexts = map[string][]byte{} + +// vectorRequest is the stored request the confirmation vector approves. +func vectorRequest() Request { + return Request{ReqID: "AAECAwQFBgcICQoLDA0ODw", Agent: "oKGio6Sl", Op: OpSetMode, + Args: map[string]any{"mode": "self_consumption"}, Why: "Cheaper tonight", + AtMs: 1_792_000_000_000, ExpiresAtMs: 1_792_000_000_000 + RequestTTLMs, State: RequestPending} +} + // vectorMessages builds every signed message, each with its signing bytes. func vectorMessages(t *testing.T, key *ecdsa.PrivateKey) []struct { what string @@ -116,7 +143,7 @@ func vectorMessages(t *testing.T, key *ecdsa.PrivateKey) []struct { Caps: Caps{PerMin: 6}, ExpiresAtMs: atMs + AgentMaxMs, AtMs: atMs, } - confirm := AgentConfirm{ReqID: "r-2f1e0d", Approve: true, AtMs: atMs} + confirm := AgentConfirm{ReqID: vectorRequest().ReqID, Approve: true, AtMs: atMs} keySetRaw, err := KeySetBytes(f, keySet) if err != nil { @@ -130,11 +157,11 @@ func vectorMessages(t *testing.T, key *ecdsa.PrivateKey) []struct { if err != nil { t.Fatal(err) } - widenRaw, err := WidenBytes(f, widen) + widenRaw, err := WidenBytes(f, widen, vectorAgentKey()) if err != nil { t.Fatal(err) } - confirmRaw, err := ConfirmBytes(f, confirm) + confirmRaw, err := ConfirmBytes(f, confirm, vectorRequest()) if err != nil { t.Fatal(err) } @@ -144,6 +171,12 @@ func vectorMessages(t *testing.T, key *ecdsa.PrivateKey) []struct { sign func(sig []byte) any raw []byte } + reqRaw, err := Marshal(vectorRequest()) + if err != nil { + t.Fatal(err) + } + contexts[MsgAgentWiden] = vectorAgentKey() + contexts[MsgAgentConfirm] = reqRaw return []msg{ {MsgApprovalKeySet, keySet, func(sig []byte) any { m := keySet; m.Sig = sig; return m }, keySetRaw}, {MsgAgentAdd, add, func(sig []byte) any { m := add; m.Sig = sig; return m }, addRaw}, @@ -172,10 +205,11 @@ func TestApprovalVectors(t *testing.T) { } sum := sha256.Sum256(m.raw) out.Cases = append(out.Cases, approvalVector{ - What: m.what, BodyHex: hex.EncodeToString(body), SignedHex: hex.EncodeToString(m.raw), - SHA256Hex: hex.EncodeToString(sum[:]), SigHex: hex.EncodeToString(sig), + What: m.what, BodyHex: hex.EncodeToString(body), ContextHex: hex.EncodeToString(contexts[m.what]), + SignedHex: hex.EncodeToString(m.raw), SHA256Hex: hex.EncodeToString(sum[:]), SigHex: hex.EncodeToString(sig), }) } + out.Offer = makeOfferVector(t) raw, err := json.MarshalIndent(out, "", " ") if err != nil { t.Fatal(err) @@ -212,7 +246,8 @@ func TestApprovalVectors(t *testing.T) { // Rebuild the signed bytes from the body as it travels, which is // what the box does. body, _ := hex.DecodeString(c.BodyHex) - signed, sig := rebuild(t, c.What, f, body) + ctx, _ := hex.DecodeString(c.ContextHex) + signed, sig := rebuild(t, c.What, f, body, ctx) if hex.EncodeToString(signed) != c.SignedHex { t.Errorf("case %d (%s): the body does not rebuild the signed bytes", i, c.What) } @@ -229,7 +264,7 @@ func TestApprovalVectors(t *testing.T) { } } -func rebuild(t *testing.T, what string, f SignedFor, body []byte) ([]byte, []byte) { +func rebuild(t *testing.T, what string, f SignedFor, body, ctx []byte) ([]byte, []byte) { t.Helper() var signed []byte var sig []byte @@ -250,14 +285,17 @@ func rebuild(t *testing.T, what string, f SignedFor, body []byte) ([]byte, []byt case MsgAgentWiden: var m AgentWiden if err = Unmarshal(body, &m); err == nil { - signed, err = WidenBytes(f, m) + signed, err = WidenBytes(f, m, ctx) sig = m.Sig } case MsgAgentConfirm: var m AgentConfirm + var req Request if err = Unmarshal(body, &m); err == nil { - signed, err = ConfirmBytes(f, m) - sig = m.Sig + if err = Unmarshal(ctx, &req); err == nil { + signed, err = ConfirmBytes(f, m, req) + sig = m.Sig + } } default: t.Fatalf("no rebuild for %s", what) @@ -341,3 +379,160 @@ func TestEnvelopeCarriesByOnlyWhenSet(t *testing.T) { t.Fatalf("by did not survive: %+v %v", got, err) } } + +// The offer vector's key: fixed like the approval key, and nobody's offer key. +func offerKey() *ecdsa.PrivateKey { + d, _ := new(big.Int).SetString("2f4e6a8c0b1d3e5f7a9c2b4d6e8f0a1c3e5b7d9f1a2c4e6b8d0f2a4c6e8b0d2f", 16) + key := &ecdsa.PrivateKey{D: d} + key.Curve = elliptic.P256() + key.X, key.Y = key.Curve.ScalarBaseMult(d.Bytes()) + return key +} + +const offerNowMs = 1_792_000_000_000 + +func vectorOffer() GrantOffer { + return GrantOffer{ + V: GrantOfferVersion, Key: vectorAgentKey(), Role: RoleAgent, + Client: "Claude", ClientID: "https://claude.ai/oauth/mcp-client-metadata", ClientHost: "claude.ai", Verified: true, + Scopes: []string{ScopeLiveRead, ScopePlanRead}, Ops: []string{}, TTLS: 30 * 24 * 60 * 60, + Code: "K7QF-2MXD", ExpMs: offerNowMs + 5*60*1000, + } +} + +func makeOfferVector(t *testing.T) offerVector { + t.Helper() + key := offerKey() + o, err := Marshal(vectorOffer()) + if err != nil { + t.Fatal(err) + } + msg, err := OfferBytes(o) + if err != nil { + t.Fatal(err) + } + signed, err := Marshal(SignedOffer{O: o, Kid: "test-1", Sig: signRaw(t, key, msg)}) + if err != nil { + t.Fatal(err) + } + return offerVector{ + Note: "docs/agents.md, The grant offer. The link fragment is base64url of signedOfferHex.", + Kid: "test-1", PubHex: hex.EncodeToString(vectorPub(key)), NowMs: offerNowMs, + SignedHex: hex.EncodeToString(signed), OHex: hex.EncodeToString(o), BytesHex: hex.EncodeToString(msg), + } +} + +func TestTheOfferVectorOpens(t *testing.T) { + raw, err := os.ReadFile(filepath.FromSlash(approvalVectorsPath)) + if err != nil { + t.Fatal(err) + } + var vec approvalVectors + if err := json.Unmarshal(raw, &vec); err != nil { + t.Fatal(err) + } + pub, _ := hex.DecodeString(vec.Offer.PubHex) + keys := map[string][]byte{vec.Offer.Kid: pub} + signed, _ := hex.DecodeString(vec.Offer.SignedHex) + var so SignedOffer + if err := Unmarshal(signed, &so); err != nil { + t.Fatal(err) + } + o, err := OpenOffer(keys, so, vec.Offer.NowMs) + if err != nil { + t.Fatal(err) + } + if o.Client != "Claude" || o.Home != "" || !o.Verified || o.ClientHost != "claude.ai" { + t.Errorf("offer %+v", o) + } + if want, _ := hex.DecodeString(vec.Offer.BytesHex); !bytes.Equal(mustOfferBytes(t, so.O), want) { + t.Error("the signed bytes changed") + } + + if _, err := OpenOffer(keys, so, o.ExpMs); !errors.Is(err, ErrOfferExpired) { + t.Errorf("at its expiry: %v", err) + } + if _, err := OpenOffer(map[string][]byte{"other": pub}, so, vec.Offer.NowMs); !errors.Is(err, ErrOfferSignature) { + t.Errorf("an unknown kid: %v", err) + } + tampered := so + tampered.O = append([]byte(nil), so.O...) + tampered.O[len(tampered.O)-1] ^= 1 + if _, err := OpenOffer(keys, tampered, vec.Offer.NowMs); !errors.Is(err, ErrOfferSignature) { + t.Errorf("a changed offer: %v", err) + } + + // A support offer from any client but Sourceful's is refused, even signed. + sup := vectorOffer() + sup.Role = RoleSupport + sup.Ticket = "FTW-1" + so2 := signOffer(t, sup) + if _, err := OpenOffer(keys2(), so2, offerNowMs); !errors.Is(err, ErrOfferShape) { + t.Errorf("support from another client: %v", err) + } + sup.ClientID = SupportClientID + if _, err := OpenOffer(keys2(), signOffer(t, sup), offerNowMs); err != nil { + t.Errorf("support from Sourceful: %v", err) + } + // An offer that lives longer than ten minutes is refused. + long := vectorOffer() + long.ExpMs = offerNowMs + OfferTTLMs + 1 + if _, err := OpenOffer(keys2(), signOffer(t, long), offerNowMs); !errors.Is(err, ErrOfferExpired) { + t.Errorf("a long offer: %v", err) + } +} + +func keys2() map[string][]byte { return map[string][]byte{"test-1": vectorPub(offerKey())} } + +func signOffer(t *testing.T, o GrantOffer) SignedOffer { + t.Helper() + raw, err := Marshal(o) + if err != nil { + t.Fatal(err) + } + return SignedOffer{O: raw, Kid: "test-1", Sig: signRaw(t, offerKey(), mustOfferBytes(t, raw))} +} + +func mustOfferBytes(t *testing.T, o []byte) []byte { + t.Helper() + b, err := OfferBytes(o) + if err != nil { + t.Fatal(err) + } + return b +} + +func TestConfirmBindsTheAgentTheOpAndTheArgs(t *testing.T) { + key := vectorKey() + pub := vectorPub(key) + f := vectorFor() + m := AgentConfirm{ReqID: vectorRequest().ReqID, Approve: true, AtMs: 1} + raw, err := ConfirmBytes(f, m, vectorRequest()) + if err != nil { + t.Fatal(err) + } + sig := signRaw(t, key, raw) + for name, edit := range map[string]func(*Request){ + "another agent": func(r *Request) { r.Agent = "someone" }, + "another op": func(r *Request) { r.Op = OpPlannerPrefsSet }, + "other args": func(r *Request) { r.Args = map[string]any{"mode": "idle"} }, + } { + req := vectorRequest() + edit(&req) + other, _ := ConfirmBytes(f, m, req) + if VerifyApproval(pub, other, sig) == nil { + t.Errorf("%s: the confirmation still verifies", name) + } + } +} + +func TestByNamesAPersonOrABot(t *testing.T) { + for by, want := range map[string]bool{ + "staff:anna.k": true, "bot:triage": true, "staff:": false, "admin:x": false, "anna": false, + "staff:a b": false, "staff:" + strings.Repeat("a", 60): false, + } { + if ValidBy(by) != want { + t.Errorf("%q: want %v", by, want) + } + } +} diff --git a/go/protocol/cloudwire/allowlist.go b/go/protocol/cloudwire/allowlist.go index ffc97e5e3..82818c6c9 100644 --- a/go/protocol/cloudwire/allowlist.go +++ b/go/protocol/cloudwire/allowlist.go @@ -33,7 +33,7 @@ var Fields = map[string][]string{ MsgEvent: {"eventId", "ts", "kind", "severity", "args", "src", "lp"}, - MsgRoster: {"rosterSeq", "ttlS", "devices", "grant", "pending"}, + MsgRoster: {"rosterSeq", "ttlS", "devices", "grant", "pending", "noise"}, "Device": {"id", "key", "role", "scopes", "epoch", "tun", "agent"}, // An agent row's grant (docs/agents.md). The client's name and the // ticket came from FTW Cloud's own consent page and support system. diff --git a/go/protocol/cloudwire/messages.go b/go/protocol/cloudwire/messages.go index 02d007d6c..b9416ca0f 100644 --- a/go/protocol/cloudwire/messages.go +++ b/go/protocol/cloudwire/messages.go @@ -274,6 +274,10 @@ type Roster struct { // first session through the service, for a phone the roster does not // list yet. Pending []Pending `cbor:"pending"` + // Noise is the box's X25519 Noise static key, the one in its pairing + // QR code. FTW Cloud's keys part opens an agent's session to it, and + // trusts it only as signed here, by the home's key. + Noise []byte `cbor:"noise"` } // Device is one paired phone. diff --git a/go/protocol/cloudwire/testdata/cloud-vectors.json b/go/protocol/cloudwire/testdata/cloud-vectors.json index 7a9dd7804..229614604 100644 --- a/go/protocol/cloudwire/testdata/cloud-vectors.json +++ b/go/protocol/cloudwire/testdata/cloud-vectors.json @@ -66,11 +66,11 @@ "name": "roster", "signer": "box", "t": "roster", - "body": "a9637365710264626f6f7450b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b06474746c531a00015180656772616e74a462696450444444444444444444444444444444446673636f706573826d6674772e6c6976652e726561646f6674772e6576656e74732e7265616468707572706f736573816573657276656a636f6e74726f6c6c657269736f7572636566756c6677616c6c4d731b000001a130d7a00a676465766963657382a66269646871354c77305a6231636b6579582055555555555555555555555555555555555555555555555555555555555555556374756ef464726f6c65656f776e65726565706f6368016673636f706573856d6674772e6c6976652e72656164706674772e686973746f72792e726561646d6674772e706c616e2e726561646f6674772e6865616c74682e726561646f6674772e6576656e74732e72656164a6626964685a66303978513261636b6579582066666666666666666666666666666666666666666666666666666666666666666374756ef464726f6c65667669657765726565706f6368026673636f706573816d6674772e6c6976652e726561646770656e64696e678068757074696d654d7319ea6a69726f7374657253657104", - "signedInputSha256": "54a45d8ab064d1d9fda8dfd3d43708dca9294daefe67078b15ab17ae1c3c086a", - "sig": "26de4f6b491496569361fce489167aa3a445c91235689a79f5499f5a65d4ed5e35ecd601251013d345f8171904bd5b508e0a05d543dc25f2335b2d7a743ad916", - "envelope": "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", 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"aa637365710e64626f6f7450b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b06474746c531a00015180656772616e74a4626964406673636f7065738068707572706f736573806a636f6e74726f6c6c657269736f7572636566756c656e6f697365582077777777777777777777777777777777777777777777777777777777777777776677616c6c4d731b000001a130d7de80676465766963657382a66269646871354c77305a6231636b6579582055555555555555555555555555555555555555555555555555555555555555556374756ef564726f6c65656f776e65726565706f6368016673636f70657380a7626964686f4b47696f36536c636b65795820a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a06374756ef464726f6c6567737570706f7274656167656e74a5636f7073816e6c6f6164706f696e742e686f6c646463617073a3646d617857191ce865686f6c6453190384667065724d696e066673636f70657383716674772e64697370617463682e686f6c646d6674772e6c6976652e726561646d6674772e6c6f67732e72656164697072696e636970616ca366636c69656e7471536f7572636566756c20737570706f7274667469636b6574674654572d31323368636c69656e744964783268747470733a2f2f636c6f75642e6674772e656e657267792f636c69656e74732f736f7572636566756c2d737570706f72746b6578706972657341744d731b000001a17720ca006565706f6368016673636f706573806770656e64696e678068757074696d654d731a000128e069726f7374657253657107", + "signedInputSha256": "24ade7fd185b91e8c5c954c34805ebed51cbbf8d6e36097c7a903ebbfe5db7aa", + "sig": "f2f15bfcafd92e077fb41218fb5eca3735d45484cab4074541f0908b8e6a1107a31f8bf3caf605405bd7cbd02963ff4466a40de915aa9d9af96166e5fc5965a7", + "envelope": "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", + "frame": "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" } ] } diff --git a/go/protocol/cloudwire/vectors_test.go b/go/protocol/cloudwire/vectors_test.go index 448378196..60e199a7f 100644 --- a/go/protocol/cloudwire/vectors_test.go +++ b/go/protocol/cloudwire/vectors_test.go @@ -97,7 +97,7 @@ func vectorBodies(grantKey []byte, boxPK []byte) []struct { Have: map[string]string{}, RosterSeq: 3, }}, {"roster", "box", MsgRoster, Roster{ - Header: h(2, 60_010), RosterSeq: 4, TTLS: 86_400, + Header: h(2, 60_010), RosterSeq: 4, TTLS: 86_400, Noise: bytes.Repeat([]byte{0x77}, 32), Devices: []Device{ {ID: "q5Lw0Zb1", Key: bytes.Repeat([]byte{0x55}, 32), Role: "owner", Scopes: []string{protocol.ScopeLiveRead, protocol.ScopeHistoryRead, protocol.ScopePlanRead, @@ -177,7 +177,7 @@ func vectorBodies(grantKey []byte, boxPK []byte) []struct { // The tunnel. A box linked at pairing, with the readable copy off: // two phones that may open a session, one QR code on the screen. {"roster tunnel only", "box", MsgRoster, Roster{ - Header: h(12, 74_000), RosterSeq: 5, TTLS: 86_400, + Header: h(12, 74_000), RosterSeq: 5, TTLS: 86_400, Noise: bytes.Repeat([]byte{0x77}, 32), Devices: []Device{ {ID: "q5Lw0Zb1", Key: bytes.Repeat([]byte{0x55}, 32), Role: "owner", Scopes: []string{}, Epoch: 1, Tun: true}, {ID: "Zf09xQ2a", Key: bytes.Repeat([]byte{0x66}, 32), Role: "viewer", Scopes: []string{}, Epoch: 2, Tun: true}, @@ -188,7 +188,7 @@ func vectorBodies(grantKey []byte, boxPK []byte) []struct { // A revoke that waits for its receipt: the grant keeps its id and // loses its scopes and purposes. {"roster revoking", "box", MsgRoster, Roster{ - Header: h(13, 75_000), RosterSeq: 6, TTLS: 86_400, + Header: h(13, 75_000), RosterSeq: 6, TTLS: 86_400, Noise: bytes.Repeat([]byte{0x77}, 32), Devices: []Device{ {ID: "q5Lw0Zb1", Key: bytes.Repeat([]byte{0x55}, 32), Role: "owner", Scopes: []string{}, Epoch: 1, Tun: true}, }, @@ -200,6 +200,22 @@ func vectorBodies(grantKey []byte, boxPK []byte) []struct { {"tun down", "", MsgTun, Tun{Dev: "q5Lw0Zb1", Sid: 7, D: bytes.Repeat([]byte{0x99}, 112)}}, {"tun up", "", MsgTun, Tun{Dev: "q5Lw0Zb1", Sid: 7, D: bytes.Repeat([]byte{0x9a}, 48)}}, {"tun end", "", MsgTun, Tun{Dev: "q5Lw0Zb1", Sid: 7, D: []byte{}}}, + // An agent row: no tun and no copy scopes, because only the keys + // part opens its session (docs/agents.md). + {"roster with an agent", "box", MsgRoster, Roster{ + Header: h(14, 76_000), RosterSeq: 7, TTLS: 86_400, Noise: bytes.Repeat([]byte{0x77}, 32), + Devices: []Device{ + {ID: "q5Lw0Zb1", Key: bytes.Repeat([]byte{0x55}, 32), Role: "owner", Scopes: []string{}, Epoch: 1, Tun: true}, + {ID: "oKGio6Sl", Key: bytes.Repeat([]byte{0xa0}, 32), Role: protocol.RoleSupport, Scopes: []string{}, + Epoch: 1, Agent: &Agent{ + Scopes: []string{protocol.ScopeDispatchHold, protocol.ScopeLiveRead, protocol.ScopeLogsRead}, + Ops: []string{protocol.OpLoadpointHold}, Caps: protocol.Caps{HoldS: 900, MaxW: 7400, PerMin: 6}, + ExpiresAtMs: 1_793_000_000_000, + Principal: protocol.Principal{Client: "Sourceful support", ClientID: protocol.SupportClientID, Ticket: "FTW-123"}, + }}, + }, + Grant: Grant{Scopes: []string{}, Purposes: []string{}, Controller: ControllerSourceful}, + }}, } } diff --git a/go/protocol/contract_gen.go b/go/protocol/contract_gen.go index d668814bb..02d6ee5fb 100644 --- a/go/protocol/contract_gen.go +++ b/go/protocol/contract_gen.go @@ -267,13 +267,67 @@ var RegistryOps = map[string]string{ var RegistryAgentOps = map[string]string{ "site.mode.set": "ftw.goals.request", "planner.prefs.set": "ftw.goals.request", - "battery.hold": "ftw.dispatch.hold", "loadpoint.hold": "ftw.dispatch.hold", - "loadpoint.boost": "ftw.dispatch.hold", "loadpoint.soc.set": "ftw.goals.request", "loadpoint.surplus_only.set": "ftw.goals.request", } +// RegistryAgentArgs is what an agent may put in each op it can name. The +// box refuses any other key, kind or range, in a cmd and in an +// agent.request, as it arrives. +var RegistryAgentArgs = map[string][]AgentArg{ + "loadpoint.hold": { + {Name: "id", Kind: "loadpoint", Unit: "", Required: true, Cap: "", Label: "Charger"}, + {Name: "power_w", Kind: "power", Unit: "W", Min: bound(0), Required: false, Cap: "maxW", Label: "Charging power"}, + {Name: "hold_s", Kind: "duration", Unit: "s", Min: bound(1), Required: false, Cap: "holdS", Label: "For how long"}, + {Name: "phase_mode", Kind: "enum", Unit: "", Values: []string{"auto", "1p", "3p"}, Required: false, Cap: "", Label: "Phases"}, + {Name: "clear", Kind: "bool", Unit: "", Required: false, Cap: "", Label: "Stop the agent's own hold"}, + }, + "loadpoint.soc.set": { + {Name: "id", Kind: "loadpoint", Unit: "", Required: true, Cap: "", Label: "Charger"}, + {Name: "soc", Kind: "ratio", Unit: "", Min: bound(0), Max: bound(1), Required: true, Cap: "", Label: "The car's charge level"}, + }, + "loadpoint.surplus_only.set": { + {Name: "id", Kind: "loadpoint", Unit: "", Required: true, Cap: "", Label: "Charger"}, + {Name: "surplus_only", Kind: "bool", Unit: "", Required: true, Cap: "", Label: "Charge from solar only"}, + }, + "planner.prefs.set": { + {Name: "safety_k", Kind: "number", Unit: "", Min: bound(0), Max: bound(2), Required: false, Cap: "", Label: "How cautious the plan is"}, + {Name: "battery_export", Kind: "enum", Unit: "", Values: []string{"unknown", "not_allowed", "allowed"}, Required: false, Cap: "", Label: "Whether the battery may sell to the grid"}, + }, + "site.mode.set": { + {Name: "mode", Kind: "mode", Unit: "", Required: true, Cap: "", Label: "Operating mode"}, + }, +} + +// RegistryReads maps each read an agent may send to the scope it needs. +var RegistryReads = map[string]string{ + // live.get — Readings and freshness now. + "live.get": "ftw.live.read", + // loadpoints.get — Each charger and the car on it. + "loadpoints.get": "ftw.live.read", + // cars.get — Each car's level and goal. + "cars.get": "ftw.live.read", + // plan.get — The plan and its reasons. + "plan.get": "ftw.plan.read", + // price.get — Electricity prices. + "price.get": "ftw.plan.read", + // hist.query — Stored history. + "hist.query": "ftw.history.read", + // health.get — The health summary. + "health.get": "ftw.health.read", + // drivers.get — Each driver's state. + "drivers.get": "ftw.health.read", + // events.get — Recent events. + "events.get": "ftw.events.read", + // logs.get — A log excerpt the box redacts. + "logs.get": "ftw.logs.read", + // config.get — A configuration section the box redacts. + "config.get": "ftw.config.read", + // diag.run — A check that changes nothing. + "diag.run": "ftw.diag.run", +} + // Error codes. The box sends the code and machine-readable args; the app // owns every word of prose, in every language it ships. const ( @@ -321,8 +375,10 @@ const ( ErrBadSignature = "E_BAD_SIGNATURE" // ErrNoApprovalKey — This phone has no approval key on the box. ErrNoApprovalKey = "E_NO_APPROVAL_KEY" - // ErrNotFound — No such agent or request. + // ErrNotFound — Nothing by that id or name. ErrNotFound = "E_NOT_FOUND" + // ErrClockSkew — The approval's time is too far from the box's. + ErrClockSkew = "E_CLOCK_SKEW" ) // ErrorRetryable reports whether the app should offer a retry for a code. @@ -350,6 +406,7 @@ var ErrorRetryable = map[string]bool{ ErrBadSignature: false, ErrNoApprovalKey: false, ErrNotFound: false, + ErrClockSkew: true, } // SourceState says whether a device is answering. It is orthogonal to the diff --git a/go/protocol/push_gen.go b/go/protocol/push_gen.go index 31aacb6b4..80cc24182 100644 --- a/go/protocol/push_gen.go +++ b/go/protocol/push_gen.go @@ -20,6 +20,9 @@ const ( PushCloudRevoked = "cloud.revoked" PushAgentAdded = "agent.added" PushAgentRequest = "agent.request" + PushAgentExpiring = "agent.expiring" + PushApprovalKeySet = "approval.key.set" + PushOwnerAdded = "owner.added" ) // PushSentence is one lock-screen sentence, exactly as the app wrote it. @@ -43,4 +46,7 @@ var PushSentences = map[string]PushSentence{ PushCloudRevoked: {Title: "FTW Cloud is off", Body: "Your box stopped sharing with FTW Cloud and asked it to delete its copy."}, PushAgentAdded: {Title: "New access to your box", Body: "You gave an assistant or Sourceful access. See who has access in the app."}, PushAgentRequest: {Title: "Waiting for your answer", Body: "An assistant asks to change a setting. Open FTW to confirm or decline."}, + PushAgentExpiring: {Title: "Access ends tomorrow", Body: "An assistant's or Sourceful's access to your box runs out in a day. Renew it in the app if it should go on."}, + PushApprovalKeySet: {Title: "A phone can now approve access", Body: "A phone set up the key it uses to approve access to your box. If that was not you, remove the phone in the app."}, + PushOwnerAdded: {Title: "A new owner", Body: "A phone was paired as an owner of your box. If that was not you, remove it in the app."}, } diff --git a/go/protocol/testdata/approval-vectors.json b/go/protocol/testdata/approval-vectors.json index eb4d2804e..543df3bd2 100644 --- a/go/protocol/testdata/approval-vectors.json +++ b/go/protocol/testdata/approval-vectors.json @@ -6,38 +6,49 @@ "cases": [ { "what": "approval.key.set", - "bodyHex": "a36370756258410494bd59f0454b6dffdb14ceb8fb777884a5b85fb3087458ab665a9e43c1943a0b2640997629d88c605987519a24a822fa1787ad19970d6e76761360872f833d2c63736967584014912a9b26a4afc357e9270d2062272e1e2f5537166581eaa50ba251e4258cf0cea6978c396a00bf448bfce76e14901244c77751fe140151af9b5bcc6f4327776461744d731b000001a13b860000", + "bodyHex": "a36370756258410494bd59f0454b6dffdb14ceb8fb777884a5b85fb3087458ab665a9e43c1943a0b2640997629d88c605987519a24a822fa1787ad19970d6e76761360872f833d2c637369675840826f15a6391860089c3960720a310b9f5114c05f9d99dbf654f59399e6955b8ddcfe3400eb67ad1006883df32e3237ff473ab3c5ad3c4b12c9b04f8a399103e96461744d731b000001a13b860000", "signedHex": "866f6674772e617070726f76616c2e763170617070726f76616c2e6b65792e73657458200102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20686f776e65725068311b000001a13b86000058410494bd59f0454b6dffdb14ceb8fb777884a5b85fb3087458ab665a9e43c1943a0b2640997629d88c605987519a24a822fa1787ad19970d6e76761360872f833d2c", "sha256Hex": "c1b1e8e41f10d4fb9bf01e62f679c7dab38f157beafc9206732cd50f9ae4e19c", - "sigHex": "14912a9b26a4afc357e9270d2062272e1e2f5537166581eaa50ba251e4258cf0cea6978c396a00bf448bfce76e14901244c77751fe140151af9b5bcc6f432777" + "sigHex": "826f15a6391860089c3960720a310b9f5114c05f9d99dbf654f59399e6955b8ddcfe3400eb67ad1006883df32e3237ff473ab3c5ad3c4b12c9b04f8a399103e9" }, { "what": "agent.add", - "bodyHex": "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", + "bodyHex": "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", "signedHex": "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", "sha256Hex": "638de060149662d97f7ee71bd30c3d6a76e010171ed21fb874c9d3ea589bfc74", - 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"sigHex": "917a3901d206afc899769f5c2961754c9953ee6d0872c4e1678392473305b69bfb3340d7fd2efaf0fadfacb47d3a6f4495888ea8b2efea4cbde9c2f57b70011d" + "sigHex": "6070c597e7a510b2f1bfea6ce4f93ddcb54838978ecf22432f6e9d6e17fa1b9aa2d50e70c876f6e8888e0304a7b651c8eec575d61baf35c0d54622863e270093" }, { "what": "agent.widen", - "bodyHex": "a8626964686f4b47696f36536c636f7073f6637369675840eb629e09fca4833882dce48bfcd06ddd70d53b580b88e90df55c90210189721aa7e7c4c767017b94d586167bc2e6098b790a68f045aa7a669793be5ce8434c946461744d731b000001a13b8600006463617073a3646d6178570065686f6c645300667065724d696e066565706f6368026673636f706573826d6674772e6c6976652e726561646d6674772e706c616e2e726561646b6578706972657341744d731b000001a1d604c800", - "signedHex": "8b6f6674772e617070726f76616c2e76316b6167656e742e776964656e58200102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20686f776e65725068311b000001a13b860000686f4b47696f36536c02826d6674772e6c6976652e726561646d6674772e706c616e2e7265616480830000061b000001a1d604c800", - "sha256Hex": "8e46b77de3f7ea09c29527d5de498bf65c89c2b540cfedbd36f12597c9c8fb96", - "sigHex": "eb629e09fca4833882dce48bfcd06ddd70d53b580b88e90df55c90210189721aa7e7c4c767017b94d586167bc2e6098b790a68f045aa7a669793be5ce8434c94" + "bodyHex": "a8626964686f4b47696f36536c636f7073f6637369675840bf5b17596216f7f27c2977505deff3aceca3f28b8d2d8ce83d40b565397bfa2b9f43d9c1247b657c3e3a877fbd91962737fb57a3e20ffde54a425ca6086748566461744d731b000001a13b8600006463617073a3646d6178570065686f6c645300667065724d696e066565706f6368026673636f706573826d6674772e6c6976652e726561646d6674772e706c616e2e726561646b6578706972657341744d731b000001a1d604c800", + "contextHex": "a0a1a2a3a4a5a6a7a8a9aaabacadaeafb0b1b2b3b4b5b6b7b8b9babbbcbdbebf", + "signedHex": "8c6f6674772e617070726f76616c2e76316b6167656e742e776964656e58200102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20686f776e65725068311b000001a13b860000686f4b47696f36536c5820a0a1a2a3a4a5a6a7a8a9aaabacadaeafb0b1b2b3b4b5b6b7b8b9babbbcbdbebf02826d6674772e6c6976652e726561646d6674772e706c616e2e7265616480830000061b000001a1d604c800", + "sha256Hex": "f4c10ed374e6d4d814fa45bce11232c5644e2d398d9ccf80cc7125bb9f851ffe", + "sigHex": "bf5b17596216f7f27c2977505deff3aceca3f28b8d2d8ce83d40b565397bfa2b9f43d9c1247b657c3e3a877fbd91962737fb57a3e20ffde54a425ca608674856" }, { "what": "agent.confirm", - "bodyHex": "a4637369675840892d49415e6de75ef29dbea8ef9530190854dde3f2e2d698c628ec618b8385f56fb97051cb606d653fcb226df04e6ed445a25a2fe2930ac8d39d00cf6603e8bb6461744d731b000001a13b86000065726571496468722d32663165306467617070726f7665f5", - "signedHex": "866f6674772e617070726f76616c2e76316d6167656e742e636f6e6669726d58200102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20686f776e65725068311b000001a13b86000068722d326631653064", - "sha256Hex": "07d81ccbfdb8dc67f403c998357bbb2d91fc48563d21cf3f29fbf37747f0ccec", - "sigHex": "892d49415e6de75ef29dbea8ef9530190854dde3f2e2d698c628ec618b8385f56fb97051cb606d653fcb226df04e6ed445a25a2fe2930ac8d39d00cf6603e8bb" + "bodyHex": "a46373696758408319a385bbde4e45b19de37ab230140916f44758ff72566456f5b9690d9836d852d43f5111bb3d6433400ba058241143de15934129768522f43ac18ef3fa9c716461744d731b000001a13b8600006572657149647641414543417751464267634943516f4c4441304f447767617070726f7665f5", + "contextHex": "a8626f706d736974652e6d6f64652e736574637768796f4368656170657220746f6e696768746461726773a1646d6f64657073656c665f636f6e73756d7074696f6e6461744d731b000001a13b860000656167656e74686f4b47696f36536c6572657149647641414543417751464267634943516f4c4441304f44776573746174656770656e64696e676b6578706972657341744d731b000001a13e192e00", + "signedHex": "896f6674772e617070726f76616c2e76316d6167656e742e636f6e6669726d58200102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20686f776e65725068311b000001a13b8600007641414543417751464267634943516f4c4441304f4477686f4b47696f36536c6d736974652e6d6f64652e7365745820a2149767a52b4bd6163c900c759658ec707ff59838a9898538d2c0e3fe79cefe", + "sha256Hex": "81a8677e665648b6f96454b19dee4c5b2a728d6c0a12b346ee18b9315c02133e", + "sigHex": "8319a385bbde4e45b19de37ab230140916f44758ff72566456f5b9690d9836d852d43f5111bb3d6433400ba058241143de15934129768522f43ac18ef3fa9c71" } - ] + ], + "offer": { + "note": "docs/agents.md, The grant offer. The link fragment is base64url of signedOfferHex.", + "kid": "test-1", + "pubHex": "047b0b548a5dba713577235bdfc95cb2de5231c2cf856adf6112f7a248617f2fb4236ea44a16d109c9f265569c1a735b766437fae63a6afcee3da61dafd3169042", + "nowMs": 1792000000000, + "signedOfferHex": "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", + "oHex": "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", + "signedBytesHex": "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" + } } From c894a363d3a213e23990a890bcd255e418167469 Mon Sep 17 00:00:00 2001 From: Fredrik Ahlgren Date: Thu, 15 Oct 2026 20:25:34 +0200 Subject: [PATCH 5/8] docs(agents): agent ids are the copy's construction under the box's agent key Co-Authored-By: Claude Opus 5.5 (cherry picked from commit b95256145926179119bf322230eaf81d764556fb) --- docs/agents.md | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/docs/agents.md b/docs/agents.md index e23c6e042..5ebfda06e 100644 --- a/docs/agents.md +++ b/docs/agents.md @@ -367,11 +367,13 @@ The registry's `reads` table names each read and the scope it needs. | `diag.run` | `{check, src}`; `check` is `clock`, `link`, `meter`, `planner` or `driver` | `diag {check, ok, facts}` | - **Agent ids.** Every id in an answer to an agent, for a source, a charger - or a car, is the box's agent id: HMAC-SHA-256 under a key the box derives - from a secret of its own, cut to 8 base64url characters after one letter - for the kind. It is stable on one box, says nothing on another, and is not - the readable copy's id, which depends on a grant that may be off. The box - resolves an agent id in a `cmd` or an `agent.request` with the same key. + or a car, is cut the way the readable copy cuts its ids + (`cloudwire.SourceID`, `cloudwire.LoadpointID`, and the car contract's car + id), under the box's agent key instead of `grantKey`: HMAC-SHA-256 under a + key the box derives from its own static secret. It is stable on one box, + says nothing on another, and does not depend on a readable copy that may + be off. A log line's `src` is the same id. The box resolves an agent id in + a `cmd` or an `agent.request` with the same key. - **Cursors.** `beforeMs` asks for lines or events older than that wall time, `afterMs` for newer ones; the answer is oldest first, and `more` says more remain on the asked side. From 4a3ca0be0794fc58127ef4d81025ed729fc05e29 Mon Sep 17 00:00:00 2001 From: Fredrik Ahlgren Date: Thu, 15 Oct 2026 20:34:37 +0200 Subject: [PATCH 6/8] test(cloud): two tunnel tests wait for slow runners instead of failing TestOneDeviceCannotStarveTheOthersOfHandshakes gave twelve handshakes two seconds; under -race on a loaded runner one came late. It now waits for the budget to be spent, then half a second for any answer past it. TestTunDoesNotSpendTheCopysBudget read the counts before the last tun was counted, and failed if a heartbeat went meanwhile; it now waits for the count and checks that the tunnel's bytes never land on the copy's. Co-Authored-By: Claude Opus 5.5 --- go/internal/appuplink/tunnel_test.go | 13 +++++++++++-- go/internal/cloudlink/tunnel_test.go | 11 ++++++++++- 2 files changed, 21 insertions(+), 3 deletions(-) diff --git a/go/internal/appuplink/tunnel_test.go b/go/internal/appuplink/tunnel_test.go index 2dc7e1c72..ae4fe30b5 100644 --- a/go/internal/appuplink/tunnel_test.go +++ b/go/internal/appuplink/tunnel_test.go @@ -384,16 +384,25 @@ func TestOneDeviceCannotStarveTheOthersOfHandshakes(t *testing.T) { r.tunnel.Deliver(cloudwire.Tun{Dev: busyDev, Sid: uint32(100 + i), D: m1}) } // Drain what the busy device got: its answers, and the ends of the - // sessions each new one replaced. - deadline := time.After(2 * time.Second) + // sessions each new one replaced. Each answer costs X25519 work, which a + // loaded CI runner does slowly, so wait for the budget to be spent and + // then a while longer for any answer past it. answers := 0 + quiet := 500 * time.Millisecond + deadline := time.After(10 * time.Second) drain: for { + wait := time.After(quiet) + if answers < tunOpensPerDevice { + wait = nil + } select { case m := <-r.out.ch: if !m.Ended() { answers++ } + case <-wait: + break drain case <-deadline: break drain } diff --git a/go/internal/cloudlink/tunnel_test.go b/go/internal/cloudlink/tunnel_test.go index ccae96889..7b471bc5d 100644 --- a/go/internal/cloudlink/tunnel_test.go +++ b/go/internal/cloudlink/tunnel_test.go @@ -171,8 +171,17 @@ func TestTunDoesNotSpendTheCopysBudget(t *testing.T) { } svc.waitFor(cloudwire.MsgTun, 3*time.Second) } + // The last tun is counted when it leaves, a moment after the service + // sees it; and the copy's own heartbeat may go meanwhile on a slow + // runner. What must hold is that the tunnel's 40 KiB never lands on the + // copy's count. + deadline := time.Now().Add(3 * time.Second) st := h.link.Status() - if st.BytesLast24h != before || st.TunBytesLast24h < 40_960 { + for st.TunBytesLast24h < 40_960 && time.Now().Before(deadline) { + time.Sleep(10 * time.Millisecond) + st = h.link.Status() + } + if st.BytesLast24h-before >= 40_960 || st.TunBytesLast24h < 40_960 { t.Fatalf("copy %d → %d bytes, tunnel %d", before, st.BytesLast24h, st.TunBytesLast24h) } } From e25596322c66e2067e6c415db4c969f1811f9e44 Mon Sep 17 00:00:00 2001 From: Fredrik Ahlgren Date: Thu, 15 Oct 2026 20:40:16 +0200 Subject: [PATCH 7/8] contract(agents): an offer key's kid is derived from the key OfferKid is the first 16 characters of base64url(SHA-256(SEC1 point)), as FTW Cloud's keys part names its offer key. The offer vector uses it. Co-Authored-By: Claude Opus 5.5 --- docs/agents.md | 11 ++++++++-- go/protocol/agents.go | 9 ++++++++ go/protocol/agents_test.go | 10 +++++---- go/protocol/testdata/approval-vectors.json | 24 +++++++++++----------- 4 files changed, 36 insertions(+), 18 deletions(-) diff --git a/docs/agents.md b/docs/agents.md index 5ebfda06e..5b774cc90 100644 --- a/docs/agents.md +++ b/docs/agents.md @@ -581,8 +581,15 @@ the link's fragment, and what FTW Cloud's code lookup returns for a code: - `sig` is ECDSA P-256 with SHA-256 over the deterministic CBOR of `["ftw.offer.v1", o]`, `r ‖ s`, by FTW Cloud's offer key named `kid`. -The app and the box pin the offer keys, as they pin the service key, and -refuse an offer no pinned key signed. A build that pins none opens no offer. +The app and the box pin a list of offer keys, as they pin the service key, +and refuse an offer no pinned key signed. A build that pins none opens no +offer. A key's `kid` is the first 16 characters of base64url, without +padding, of SHA-256 over its SEC1 point (`protocol.OfferKid`); the box drops a +pinned entry whose `kid` does not match its key. FTW Cloud's `keys` part +makes the key on the host and keeps it sealed; FTW Cloud publishes `kid` and +the public key at `https://cloud.ftw.energy/.well-known/ftw-offer-key`, and a +release pins them. A new key sits beside the old one until every offer the +old one signed has expired. | Field | Type | Meaning | |---|---|---| diff --git a/go/protocol/agents.go b/go/protocol/agents.go index 4d104ed63..a1b266815 100644 --- a/go/protocol/agents.go +++ b/go/protocol/agents.go @@ -4,6 +4,7 @@ import ( "crypto/ecdsa" "crypto/elliptic" "crypto/sha256" + "encoding/base64" "errors" "fmt" "math/big" @@ -247,6 +248,14 @@ var ( ErrOfferShape = errors.New("protocol: the offer is malformed") ) +// OfferKid names an offer key: the first 16 characters of base64url, without +// padding, of SHA-256 over its SEC1 point. FTW Cloud publishes kid and key at +// /.well-known/ftw-offer-key; the box and the apps pin a list of them. +func OfferKid(pub []byte) string { + sum := sha256.Sum256(pub) + return base64.RawURLEncoding.EncodeToString(sum[:])[:16] +} + // OfferBytes is what an offer key signs: ["ftw.offer.v1", o]. func OfferBytes(o []byte) ([]byte, error) { return encMode.Marshal([]any{OfferTag, o}) diff --git a/go/protocol/agents_test.go b/go/protocol/agents_test.go index a922b3f2d..f58c6bbbb 100644 --- a/go/protocol/agents_test.go +++ b/go/protocol/agents_test.go @@ -411,13 +411,13 @@ func makeOfferVector(t *testing.T) offerVector { if err != nil { t.Fatal(err) } - signed, err := Marshal(SignedOffer{O: o, Kid: "test-1", Sig: signRaw(t, key, msg)}) + signed, err := Marshal(SignedOffer{O: o, Kid: OfferKid(vectorPub(key)), Sig: signRaw(t, key, msg)}) if err != nil { t.Fatal(err) } return offerVector{ Note: "docs/agents.md, The grant offer. The link fragment is base64url of signedOfferHex.", - Kid: "test-1", PubHex: hex.EncodeToString(vectorPub(key)), NowMs: offerNowMs, + Kid: OfferKid(vectorPub(key)), PubHex: hex.EncodeToString(vectorPub(key)), NowMs: offerNowMs, SignedHex: hex.EncodeToString(signed), OHex: hex.EncodeToString(o), BytesHex: hex.EncodeToString(msg), } } @@ -482,7 +482,9 @@ func TestTheOfferVectorOpens(t *testing.T) { } } -func keys2() map[string][]byte { return map[string][]byte{"test-1": vectorPub(offerKey())} } +func keys2() map[string][]byte { + return map[string][]byte{OfferKid(vectorPub(offerKey())): vectorPub(offerKey())} +} func signOffer(t *testing.T, o GrantOffer) SignedOffer { t.Helper() @@ -490,7 +492,7 @@ func signOffer(t *testing.T, o GrantOffer) SignedOffer { if err != nil { t.Fatal(err) } - return SignedOffer{O: raw, Kid: "test-1", Sig: signRaw(t, offerKey(), mustOfferBytes(t, raw))} + return SignedOffer{O: raw, Kid: OfferKid(vectorPub(offerKey())), Sig: signRaw(t, offerKey(), mustOfferBytes(t, raw))} } func mustOfferBytes(t *testing.T, o []byte) []byte { diff --git a/go/protocol/testdata/approval-vectors.json b/go/protocol/testdata/approval-vectors.json index 543df3bd2..74caff7af 100644 --- a/go/protocol/testdata/approval-vectors.json +++ b/go/protocol/testdata/approval-vectors.json @@ -6,48 +6,48 @@ "cases": [ { "what": "approval.key.set", - 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"sigHex": "8319a385bbde4e45b19de37ab230140916f44758ff72566456f5b9690d9836d852d43f5111bb3d6433400ba058241143de15934129768522f43ac18ef3fa9c71" + "sigHex": "96b5a9c1c2280fd23e59d72a6a976831afff61db35367146436f5d1b92f94de3ad4aace2fdc82787a61e52b1fdf676895c2787d8448360febff79e3db7e27ef6" } ], "offer": { "note": "docs/agents.md, The grant offer. The link fragment is base64url of signedOfferHex.", - "kid": "test-1", + "kid": "yvJTP04C98wsViEa", "pubHex": "047b0b548a5dba713577235bdfc95cb2de5231c2cf856adf6112f7a248617f2fb4236ea44a16d109c9f265569c1a735b766437fae63a6afcee3da61dafd3169042", "nowMs": 1792000000000, - "signedOfferHex": "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", + "signedOfferHex": "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", "oHex": "af617601636578701b000001a13b8a93e0636b65795820a0a1a2a3a4a5a6a7a8a9aaabacadaeafb0b1b2b3b4b5b6b7b8b9babbbcbdbebf636f7073806463617073a3646d6178570065686f6c645300667065724d696e0064636f6465694b3751462d324d584464686f6d656064726f6c65656167656e746474746c531a00278d0066636c69656e7466436c617564656673636f706573826d6674772e6c6976652e726561646d6674772e706c616e2e72656164667469636b65746068636c69656e744964782b68747470733a2f2f636c617564652e61692f6f617574682f6d63702d636c69656e742d6d65746164617461687665726966696564f56a636c69656e74486f737469636c617564652e6169", "signedBytesHex": "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" } From d6b91d2628e7ab1c0dd1b41e01c87ea5367d3f07 Mon Sep 17 00:00:00 2001 From: Fredrik Ahlgren Date: Thu, 15 Oct 2026 20:46:38 +0200 Subject: [PATCH 8/8] test(cloud): the handshake budget test holds the budget, not an exact count Handshakes run side by side and a device keeps at most four unproved sessions, so on a loaded runner one could be evicted before it answered and the test saw 11 of 12. The property is that a device never gets more than its budget and another phone still gets in. Co-Authored-By: Claude Opus 5.5 --- go/internal/appuplink/tunnel_test.go | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/go/internal/appuplink/tunnel_test.go b/go/internal/appuplink/tunnel_test.go index ae4fe30b5..3a6ee6089 100644 --- a/go/internal/appuplink/tunnel_test.go +++ b/go/internal/appuplink/tunnel_test.go @@ -407,8 +407,11 @@ drain: break drain } } - if answers != tunOpensPerDevice { - t.Fatalf("the busy device got %d handshakes answered, want %d", answers, tunOpensPerDevice) + // At most its budget. Handshakes run side by side, and a device holds at + // most tunPendingPerDevice unproved sessions, so one evicted before it + // answered is fair; what must never happen is an answer past the budget. + if answers > tunOpensPerDevice || answers < tunOpensPerDevice-tunPendingPerDevice { + t.Fatalf("the busy device got %d handshakes answered, want at most %d", answers, tunOpensPerDevice) } other := r.pair(t) r.open(t, other, deviceIDOf(other.staticPublic()), 1, nil)