Add device and geo provider selection with the host-signal Edge Cookie provider - #1044
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Add device and geo provider selection with the host-signal Edge Cookie provider#1044jwrosewell wants to merge 41 commits into
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First of five PRs decomposing the provider and permission epic. The
EdgeCookieProvider trait routes Edge Cookie minting, cookie read-back,
and KV keying through the selected provider, so a vendor identifier
round-trips verbatim instead of being dropped by the built-in shape
check.
- [ec] provider selector with per-provider [ec.providers.<key>] blocks.
The deprecated [ec] passphrase form still starts for one release
cycle: it maps to provider = "hmac" with a deprecation warning, and a
configuration carrying both forms is rejected. provider = "none"
spells explicit statelessness. A configured block that is not the
selected provider is rejected at startup, as is a block with no
selector.
- Global identifier bounds enforced by core at mint, read-back, and
cookie write: the cookie-safe alphabet [A-Za-z0-9._~-] and a 256-byte
cap. An identifier outside the bounds is rejected loudly, never
rewritten, so the cookie value and the identity-graph key can never
silently diverge.
- The identity graph is keyed by the provider's canonical form of the
identifier (normalize_id_for_kv), so equivalent representations of
one identity share one row.
- Request evidence abstraction (crate::evidence) giving providers read
access to the client IP, headers (including cookies), URL path, and
query parameters.
- Adapter injection seam: RuntimeServices carries an optional vendor
provider, so a vendor provider lives in its own crate and core never
names it. A selected provider the adapter does not inject fails the
request loudly rather than silently running stateless.
- Provider generate failures log at error level with the request
proceeding stateless.
Edge Cookie creation and use stay gated by the existing consent context
exactly as on main, including with no provider selected; the permission
model replaces that input in the third PR of this series.
Config migration: move [ec] passphrase to [ec.providers.hmac] and set
[ec] provider = "hmac". The old form keeps working for one release with
a warning. Passphrases shorter than 32 characters are now rejected at
startup; previously they were accepted.
The design spec for this slice and the next lives at
docs/superpowers/specs/2026-07-30-pluggable-providers-design.md, the
2026-07-31 draft revised to match the implementation with a
revision-record table of every divergence.
Every provider carries a mandatory registered four-character code
(provider-code-registry.md): core mints {code}~value, checks the code
at read-back, and keys the identity graph with it, so identifiers from
different providers can never collide and a switch of provider cannot
silently adopt another provider's identities. The built-in hmac
provider mints hmac~<hash>.<suffix> and dual-reads its pre-envelope
bare form for one release cycle.
Since the provider-code envelope, the mint path issues identifiers as
hmac~{64hex}.{6alnum}, and that is the value identify hands to partners.
Pull sync, batch sync and the admin lookup still validated the bare
shape through is_valid_ec_id, so pull sync skipped every freshly minted
identifier, batch sync answered invalid_ec_id for the value partners were
given, and the admin lookup answered 400. CI stayed green because the
lifecycle scenario seeds a bare cookie.
is_valid_ec_id now accepts the hmac envelope as well as the legacy bare
form and rejects any other provider's code, and normalize_ec_id_for_kv
keeps the envelope so the key matches the one written at mint. Tests
cover the validator, the normalizer and each of the three call sites
with a coded identifier.
CodeQL's cleartext-logging query treats a call whose name contains "passphrase" as a sensitive source, and because the method mutates the Settings it belongs to, every later log line that prints anything from Settings (store names, timeouts, header names) is reported as writing a secret to a log. The passphrase itself is a Redacted<String> and none of the flagged lines prints it. The method now describes what it does, migrate_legacy_ec_layout, and its behavior is unchanged.
A reviewer raised a P1 against the pluggable Edge Cookie provider work: three of the four adapters broke the provider contract that an unavailable required service or an uninjected provider stops the request. The Axum, Cloudflare and Spin adapters each read the Edge Cookie context with `EcContext::read_from_request_with_geo(...).unwrap_or_else(...)`, logged a warning and continued with `EcContext::default()`. A deployment whose selected provider could not be built therefore came up and served every request with no identity, silently. The Fastly adapter already kept the report and answered with an error response. `build_ec_context` on the three adapters now returns `Result<EcContext, Report<TrustedServerError>>` and every call site propagates it to that adapter's own `http_error`, the same helper Fastly uses, so all four answer with the same status and shape. The design this implements has the composition root check a selected provider's needs once at startup rather than per request, so `ensure_provider_available` was added to `ec/provider.rs` and is called from `build_state_with_settings` on all four adapters (Fastly included, so the rule is uniform). Building a provider reads no request data, so a selection an adapter can never supply now fails when application state is built, and the three adapters answer every route from their existing `startup_error_router` instead of coming up. Statelessness, meaning no `[ec] provider` selector or the explicit `"none"`, still passes and still serves. The widening question was checked rather than assumed. `read_from_request_with_geo` can only fail from two places: the provider build, and a `Cookie` header that is not valid UTF-8. A malformed cookie value is dropped with a warning by `request_ec_id_if_allowed`, consent parsing returns a value rather than a `Result`, and the geo lookup is already swallowed by the adapter before the call, so no ordinary parse problem reaches the error path and none is turned into a failed request. Tests: each of the three adapters gains a route test proving an uninjected provider fails at startup, and an in-crate test proving `build_ec_context` returns the error rather than a default context. Core gains a test that the startup check rejects an uninjected provider and still allows statelessness both ways. Addresses: Christian Pavilonis review of PR 1043, crates/trusted-server-core/src/ec/provider.rs:317 (P1)
`Settings::finalize_deserialized` runs derive validation before `Ec::migrate_legacy_ec_layout`, and the deprecated `[ec] passphrase` field carries no `#[validate]` attribute of its own, so the advertised 32-byte minimum was only enforced on the new `[ec.providers.hmac]` location. A configuration still on the old form could start with `passphrase = "short"`, or with an empty value, and mint identifiers from keying material the new location rejects. The migration now calls `Ec::validate_passphrase` on the value it is about to move, before it logs the deprecation warning and writes the `[ec.providers.hmac]` block, and reports a configuration error naming the minimum length and the new location. Tests: `a_legacy_passphrase_is_held_to_the_passphrase_rules` drives `Settings::from_toml` with the `[ec]` section rewritten to the deprecated form and proves a short value and an empty value are both rejected, and that a passphrase of adequate length still migrates to `provider = "hmac"` with the passphrase in the hmac block. Removing the new check makes that test fail, so it tests the fix rather than the surrounding code. Addresses: Aram Grigoryan review of PR 1043, crates/trusted-server-core/src/settings.rs:658 (wrench)
The provider spec (section 6) says `deny_unknown_fields` is set on both built-in provider config structs, but `HmacProviderConfig` carried no such attribute, so `[ec.providers.hmac] typo_key = "x"` was accepted silently. An operator who mistypes a key gets a deployment that starts and quietly uses the default for the setting they meant to change. `HmacProviderConfig` now sets `#[serde(deny_unknown_fields)]`, matching `Ec` itself and the rest of the settings tree. The struct is a plain field of `EcProviders` rather than a flattened one, so the attribute does not collide with the `#[serde(flatten)]` vendor map alongside it. Tests: `an_unknown_key_in_the_hmac_provider_block_is_rejected` adds an unknown key to the block in the crate test configuration and proves `Settings::from_toml` fails and names the key. Removing the attribute makes that test fail. Addresses: Aram Grigoryan review of PR 1043, crates/trusted-server-core/src/settings.rs:726 (wrench)
`build_provider`'s `"hmac"` arm mapped over `ec.providers.hmac`, so a deployment that selected `provider = "hmac"` with no `[ec.providers.hmac]` block got `Ok(None)` and ran stateless under a selector that says it has an identity provider. Every other unbuildable selection in the same match already errors. The arm now returns `TrustedServerError::EdgeCookie` naming the missing block, which the startup check `ensure_provider_available` turns into a failed application state on every adapter. `Ec::validate_provider_selection` rejects that pair before settings reach the composition root, so nothing routes through the new arm today. It is the drift guard for the case where the two checks stop agreeing, which is exactly the shape of the defect being fixed, so it is worth keeping rather than leaving the silent branch in place. Tests: `selecting_hmac_without_its_block_fails_loudly` builds the `Ec` programmatically, bypassing settings validation to reach the seam, and proves the error names the missing block. The doc comment's `# Errors` section is corrected in the same commit, since it still claimed no built-in construction can fail. Addresses: Aram Grigoryan review of PR 1043, crates/trusted-server-core/src/ec/provider.rs:304 (refactor)
The error raised when a provider mints an identifier outside the identifier bounds was written across two source lines without the trailing backslash that joins them, so the 22 spaces of source indentation became part of the literal and the logged message read "...bytes, or outside the cookie-safe alphabet". The continuation is restored, so the message reads as one sentence. The whole of ec/mod.rs was scanned for the same fault, matching every string literal and stripping real continuations before looking for runs of more than one space or a newline inside a literal. This message was the only one. Addresses: Aram Grigoryan review of PR 1043, crates/trusted-server-core/src/ec/mod.rs:444 (nitpick)
The paragraph written for the `EdgeCookieProvider` trait sat at the top of `ProviderCode`'s doc block, so rustdoc rendered it as part of that struct's documentation and the trait itself had no doc comment at all. A vendor implementer opening the trait saw nothing, and a reader of `ProviderCode` saw two subjects run together. The paragraph moves onto the trait and `ProviderCode` keeps only the registry text that belongs to it. The moved sentence was also stale: it said a provider returns `Ok(None)` from `generate`, but `generate` returns a `GeneratedEdgeCookie` and signals "no identifier this request" through its `id` field. The sentence now describes the actual return, with an intra-doc link to the field. `cargo doc --no-deps` reports no warning against either item. Addresses: Aram Grigoryan review of PR 1043, crates/trusted-server-core/src/ec/provider.rs:177 (nitpick)
`ec::get_ec_id` had no callers anywhere in the workspace, and this
branch loosened its filter to accept any well-formed `{code}~` value
with no ownership check against the selected provider. A future caller
picking it up would adopt another provider's identifiers, which
`EcContext` deliberately treats as absent.
The no-callers claim was checked across every crate in the workspace
(the four adapters, the CLI, core, the integration tests, openrtb) plus
benches, tests and docs. The only matches are for a different,
crate-private `edge_cookie::get_ec_id`, which reads the `x-ts-ec` header
as well as the cookie and is what `proxy.rs` and the testlight
integration call.
Deleted rather than realigned, for two reasons. The workspace sets
`publish = false`, so `trusted-server-core` is not distributed and
nothing outside this repository depends on the symbol. And aligning the
filter would mean calling `provider_owns_id`, which needs a
`&dyn EdgeCookieProvider` that a function taking only `&Request` cannot
obtain, so it would have meant changing the signature of a function with
no callers. `EcContext::read_from_request` already performs the
provider-aware read that production uses.
`parse_ec_from_request`, `is_valid_ec_id` and `log_id` all keep other
callers in the module, so nothing else becomes dead. The core README
line that advertised the helper is removed in the same commit.
Addresses: Aram Grigoryan review of PR 1043, crates/trusted-server-core/src/ec/mod.rs:137 (nitpick)
The `ec/provider.rs` module doc said a provider's constructor takes the services it needs, naming `RequestInfo` as the example, and its opening sentence was garbled where two half-sentences had been spliced together. `RequestInfo` is not a constructor argument. It is borrowed per call as the `request_info` parameter of `EdgeCookieProvider::generate`, so the first thing a vendor implementer read contradicted the trait they were about to implement. `evidence.rs` carried the same claim in its own words, that a constructor takes services as `Arc<dyn Trait>` supplied per request. Nothing in the workspace passes `RequestInfo` that way. Every use site is a `&dyn RequestInfo` argument. Both module docs now describe the real shape, which is construction once at startup from configuration or adapter injection, then borrowed request evidence on every call with nothing retained. The `evidence.rs` title changes to match, and its pointer to the borrowed view `BorrowedRequestInfo` is named alongside `OwnedRequestInfo`. Documentation only, no behavior change. `cargo doc --no-deps` reports no warning against either module. Addresses: Aram Grigoryan review of PR 1043, crates/trusted-server-core/src/ec/provider.rs:4 (nitpick)
The keys `"hmac"` and `"none"` were spelled as bare string literals at
four places: `Ec::validate_provider_selection`, `build_provider`,
`provider_owns_id`'s `provider.id() == "hmac"` check, and a private
`HMAC_PROVIDER_CODE` in `ec/generation.rs`. Nothing tied them together,
so a fifth built-in provider would add a fifth spelling and a typo in
any one of them would compile.
`EcProviderSelection { None, Hmac, Vendor(String) }` now holds the
vocabulary in `ec/provider.rs`, with `NONE_KEY` and `HMAC_KEY` as the
only places those two words are written. Vendor keys are open-ended, so
the catch-all `Vendor` variant takes any other key and
`#[serde(from = "String", into = "String")]` gives the enum an
infallible conversion in each direction rather than a hand-written
visitor. `HMAC_PROVIDER_CODE` moves next to it as a `ProviderCode`
const, built from `HMAC_KEY`, and `generation.rs` uses that instead of
its own copy. `HmacProvider::id` and `HmacProvider::code` return the
same two constants.
`Ec::provider` becomes `Option<EcProviderSelection>`, so the two
validation paths and `build_provider` match on variants rather than
comparing strings, and `Option` still distinguishes an absent selector
from an explicit `"none"` exactly as before.
The configuration surface is unchanged. The selector reads and writes
the same string, so an existing `trusted-server.toml` parses to the same
choice and a config push writes the same key back.
Tests: `the_selector_round_trips_through_serialization` parses `none`,
`hmac` and an arbitrary vendor key from TOML, checks each maps to its
variant, and checks each serializes back to the same string.
`each_selection_builds_what_its_string_key_built_before` proves the
three selections still build what they built before, which is nothing
for `none`, the built-in provider with the built-in code for `hmac`, and
the adapter-injected provider of that id for a vendor key.
Addresses: Aram Grigoryan review of PR 1043, crates/trusted-server-core/src/ec/provider.rs (refactor)
A provider's response headers were inserted into the outbound response without any check on what they set. A provider could return `Set-Cookie: ts-ec=...`, including on a request where it minted no identifier at all, and so write the managed identity cookie without going through core's identifier validation or its requirement that a minted identifier have an identity-graph row. It could also overwrite an `x-ts-*` header or a framing header. Core now defends by reserving its own namespace rather than banning `Set-Cookie`, because providers legitimately need cookies of their own. `reserved_response_effect` in `ec/provider.rs` classifies one header and rejects three things: a `Set-Cookie` naming a cookie in the `ts-` prefix core manages (`ts-ec`, `ts-eids`, `ts-tester`), a header in the `x-ts-` namespace core emits and strips, and a message framing or hop-by-hop header (RFC 7230 6.1 plus `content-length`, the same set each adapter's `is_hop_by_hop_response_header` uses). Everything else, a provider's own cookie included, passes through unchanged. The cookie name is read from the raw header bytes so a value that is not valid UTF-8 cannot smuggle a managed name past the check. A rejected effect fails the request rather than being dropped with a log. The check sits in `EcContext::generate_with_provider`, the only place provider headers are captured, next to the identifier-bounds check that already fails the request when a provider mints outside the cookie-safe alphabet. Both are the same kind of fault, a provider breaking its contract, and this branch has already decided that identity problems stop the request rather than serving without identity. Finalization cannot fail a request in any case, since it returns no result. Tests cover the classifier directly (managed cookie, reserved header, framing header, a non-UTF-8 `Set-Cookie`, and the allowed cases), and cover both halves through the organic generate path: a provider setting `ts-ec` with no identifier fails the request, and a provider setting its own `acme-evidence` cookie mints normally and has that cookie reach the response alongside core's own `ts-ec`. Addresses: Christian Pavilonis review of PR 1043, crates/trusted-server-core/src/ec/finalize.rs:57 (P2)
`is_valid_ec_id` is the built-in HMAC grammar and rejects every other provider code, yet pull sync, batch sync, and the admin lookup all called it directly. A deployment running a non-HMAC provider therefore minted and read identifiers on the organic path that these three paths skipped or rejected. PR IABTechLab#1044's `hs00~` host-signal provider makes that concrete. The check is now split in two, in `AcceptedProviders` in `ec/provider.rs`. The global cookie bounds, the length cap and the cookie-safe alphabet in `ec_id_has_only_allowed_chars`, apply to every identifier whoever minted it. The rest is dispatched by the `{code}~` prefix to the provider that owns that code, which canonicalizes its own value part and decides whether the canonical form is one of its own. Dispatch is on the code alone, before any provider inspects a value, so an identifier a partner echoed back in a different case still reaches its own provider to be canonicalized rather than being rejected first. KV normalization goes the same way through `canonical_kv_key`, so a row is always keyed by the owning provider's canonical form. A code no configured provider reads is rejected. The set of accepted providers is the deployment's active provider. `legacy_providers`, the design's list of readers that never mint, is not implemented on this branch (the key is rejected as unknown, see section 6.1 of the pluggable-providers design), so `AcceptedProviders::active` fills the reader list with the one active provider. The list is the seam: configured legacy readers are pushed alongside it and neither `accepts` nor `canonical_kv_key` changes. With no provider selected at all the deployment is stateless, and the built-in grammar stays the fallback, matching what `EcContext::accepts_id` has always done. Wiring: `EcContext::accepts_id` now goes through `AcceptedProviders`, so pull sync validates through it; `handle_batch_sync` and `handle_admin_ec_lookup` take the selected provider, which the Fastly adapter builds at both call sites. Tests cover a non-HMAC identifier accepted in pull sync, batch sync, and the admin lookup; a code neither active nor configured rejected in batch sync and the admin lookup, including one in the built-in HMAC shape; KV normalization dispatched to the owning provider (the built-in lowercases its hash segment, an opaque provider keys verbatim); and the global bounds rejecting before any provider is consulted. Addresses: Christian Pavilonis review of PR 1043, crates/trusted-server-core/src/ec/generation.rs:207 (P2)
`EcContext::generate_if_needed` failed the request whenever the host could not determine a client IP, before the selected provider was asked anything. `RequestInfo::client_ip` already defines the empty string as the unavailable state and providers are meant to read only the evidence they need, so the generic check blocked every header-, cookie-, query- and client-derived provider that can work without an IP. The requirement moves into `HmacProvider`, whose only input is the client IP. With none it fails rather than hashing the empty string into an identifier every visitor on that host would share. That failure propagates out of `generate_if_needed` exactly as the old check did, so a provider that genuinely needs the IP and cannot get it still fails the request rather than quietly minting nothing, matching this branch's decision to stop rather than serve without identity. Providers that read other evidence now receive the documented empty value and run. `HmacProvider` is the only provider on this branch that reads the client IP; the injected vendor seam leaves the decision to each vendor crate. Tests cover both answers: a provider deriving identity from the request query and cookies mints on a host with no client IP, and the built-in HMAC provider refuses on the same host with no identifier committed. A `noop_services_with_ec_provider_without_client_ip` test helper models that host. Addresses: Christian Pavilonis review of PR 1043, crates/trusted-server-core/src/ec/mod.rs:376 (P2)
The comment on `provider_owns_id` promised bare-HMAC compatibility for one release cycle, which the code cannot honor. A returning visitor's bare cookie is never rewritten into the coded form, so the promise was shorter than the cookie's own life. The comment now states the condition the quantities actually support, read off the code rather than estimated. Neither the cookie nor its identity-graph row is refreshed on an ordinary page view (see `ec_finalize_response`), so each has one fixed lifetime from the moment it was written: `COOKIE_MAX_AGE` in `ec/cookies.rs` and `ENTRY_TTL` in `ec/kv.rs`, both one year and neither operator-configurable. The earliest safe retirement is one year after the last release that could still mint a bare identifier has stopped running anywhere, plus the deployment's own rollout skew. The comment also says plainly that the second half of the condition cannot be checked: nothing counts or logs a bare-form read-back, so there is no observed legacy-reader traffic to look at and elapsed time alone proves nothing. No metric is named that is not emitted. The reader stays, at the cost of one string comparison per read-back, and the one-release wording is gone from the comment and from the provider code registry. A new test in `ec/cookies.rs` pins `COOKIE_MAX_AGE` to one year, next to the existing `ENTRY_TTL` assertion in `ec/kv.rs`, so the two figures the retirement condition is written in terms of cannot drift unnoticed. Addresses: Christian Pavilonis review of PR 1043, crates/trusted-server-core/src/ec/provider.rs:145 (non-blocking)
The lifecycle contract routes every identity-graph row through the owning
provider's canonical form, and generation already did: it keys the row it
creates with `provider_kv_key`. Three read and write-back paths did not.
`handle_identify` read with the raw cookie value, the withdrawal
tombstones in `ec_finalize_response` were written under the raw value,
and EID ingestion keyed its upsert by the raw value too.
Raw and canonical are the same string for the built-in HMAC provider, so
nothing misbehaved. For the first provider whose canonical form differs
from the cookie value, which is exactly the case the mint test on this
branch already pins, identify missed the row generation had written, an
ingested EID was dropped because the upsert found no row under the raw
value, and a withdrawal tombstone landed on a key no live row used, so
the revocation never took effect.
The key is now derived in one place, `EcContext::kv_key_for`, reached by
`ec_kv_key` for the active identifier and `cookie_ec_kv_key` for the
`ts-ec` cookie the request carried. Both go through `AcceptedProviders`,
so the owning provider is picked by the identifier's `{code}~` prefix and
supplies the canonical form of its own value part. Identify, the
tombstones, and both EID ingestion call sites use them.
`AcceptedProviders` came from the partner-path dispatch commit and fixed
none of these three; it changed pull sync, batch sync, and the admin
lookup only. What it did give this fix is `canonical_kv_key`, the
code-dispatched derivation these paths now share, and it also subsumes
the shape filter `withdrawal_ec_ids` applied by hand: a key exists
exactly when some provider this deployment reads owns the identifier, so
`withdrawal_kv_keys` filters by deriving.
The mint test now asserts `ec_kv_key` returns the key generation actually
wrote, so the read side and the write side cannot drift apart.
Tests: identify finds the row generation keyed by the canonical form and
still echoes the cookie value to the partner; a withdrawal tombstones the
canonical row and writes nothing under the raw cookie value; an ingested
EID joins the canonical row. Each was run against the unfixed code first
and each failed there.
Addresses: Aram Grigoryan review of PR 1043, crates/trusted-server-core/src/ec/identify.rs:89 (wrench)
Section 3's Recognize row says a value the selected provider does not recognize "is never used or egressed". Three paths egressed one anyway. `append_ec_id` put the raw `ts-ec` cookie or `x-ts-ec` header on the outbound origin URL, `handle_first_party_click` put it on the click target's redirect URL, and the testlight integration put it in the proxied body as `user.id`. All three read through `edge_cookie::get_ec_id`, which checks the cookie-safe alphabet and the length cap and nothing else, so a value carrying another deployment's provider code (`zz00~...`), and any cookie at all in a deployment with no provider selected, was handed on. The code changes rather than the claim. `edge_cookie::recognized_ec_id` reads the value and then asks the selected provider whether it owns it, through `provider_owns_id`, which is the same test `EcContext` applies when it reads the cookie back, so the egress paths and the EC lifecycle agree on what this deployment issued. All three call sites use it. Behavior change: a deployment with no Edge Cookie provider selected now forwards no `ts-ec` value at all, on any of the three paths. It previously forwarded whatever the browser sent. An operator running stateless and relying on the raw cookie reaching the origin, the click target, or the testlight upstream will see that value stop arriving, and testlight, which requires an identifier, will fail the request rather than proxy it. The fix for such a deployment is to select a provider, which is what makes the value this deployment's to hand on. The testlight call site is in scope on the evidence rather than by assumption: its value is written into the request body as `user.id` by `rewrite_request_body` and that body is POSTed to the operator-configured endpoint, so the identifier leaves the edge even though the integration sets `forward_ec_id = false` (which suppresses only the query-parameter copy on the same request). The spec's Recognize row now names the three egress paths in the column that says where core applies recognition, and records that a stateless deployment recognizes nothing and so egresses nothing. The claim is left as strong as it was. Tests: each of the three paths, with a foreign-coded value and with a stateless deployment, plus a positive control on each that the deployment's own identifier still gets through. The testlight cases assert no upstream call is made at all. `click_appends_ec_id_when_present` used `ec-123`, which no provider issues, and now uses an identifier the built-in HMAC provider owns. Every new test was run against the unfixed code and failed there. Addresses: Aram Grigoryan review of PR 1043, crates/trusted-server-core/src/proxy.rs:1263 (question)
Section 3 said the pre-epic IP-cluster prefix listing "continues unchanged". The listing does, but the key space it lists over does not. A fresh mint is keyed `hmac~<hash>.<suffix>`, so the prefix `evaluate_cluster` derives is `hmac~<hash>` for a coded row while a legacy bare row still lists under `<hash>` alone. Prefix matching is anchored at the start of the key, so two rows for the same client IP that straddle the envelope never count each other and `cluster_size` under-reports while both populations coexist. The decision is to accept the undercount rather than bridge it, and the spec now says so along with the bound and the reasoning, and the prefix derivation in `evaluate_cluster` carries the same note so the next reader of that line is not surprised by it. The "gates nothing" half of the reasoning was checked rather than assumed. Every read of `cluster_size` in the workspace is a store, a log line, or the optional field in the identify response. The single read that reaches a branch is the cache short circuit in `evaluate_cluster` itself, which tests whether a value is stored, not what it is, so `Some(1)` and `Some(100000)` take the same path. There are no matches at all in the TypeScript or the integration tests. Two settings look like they gate on it and do not: `cluster_trust_threshold` (whose doc comment says entries at or below it "are treated as individual users for identity resolution") and `cluster_recheck_secs` are parsed and defaulted but have no readers anywhere in the code. They are noted here because they are what would make a reader believe the count is a control. They are outside this change; the unimplemented threshold wants an issue of its own. Addresses: Aram Grigoryan review of PR 1043, crates/trusted-server-core/src/ec/kv.rs:715 (thinking)
The two egress tests added in the previous commit dropped the `Report<TrustedServerError>` that `expect_err` returns on the floor. `Report` is `#[must_use]`, so building the library's test target warned, and clippy runs with `--all-targets -- -D warnings`, which would have failed the CI gate rather than only warning.
The spec's minimalism rule wants a production caller in the same change that introduces a method. `RequestInfo` arrived with seven accessors and only one of them, `client_ip`, is read by production code, in `HmacProvider::generate` at crates/trusted-server-core/src/ec/provider.rs. The other six had no non-test caller anywhere in the workspace on this branch as it stands: - `user_agent()` and `header_names()` had no caller at all, test or otherwise, beyond their two implementations. - `header()` and `query_param()` were called only by two test doubles in `ec/mod.rs`, both inside `#[cfg(test)]`, plus evidence.rs's own tests. - `path()` and `query()` were called only by evidence.rs's own tests, and `query()` by the default body of `query_param()`, which nothing called. Note the file is crates/trusted-server-core/src/evidence.rs; there is no `ec/evidence.rs`. The many `.path()`, `.query()` and `.header()` hits elsewhere in the workspace are `http::Uri`, `http::request::Builder` and the unrelated `http_util::RequestInfo` struct, which has `host` and `scheme` fields and none of these methods. All six are removed, along with everything that existed only to feed them: the `headers`, `path` and `query` fields and the `with_request_target` builder on both `OwnedRequestInfo` and `BorrowedRequestInfo`, the header snapshot argument of `OwnedRequestInfo::new`, `BorrowedRequestInfo::new` and the test-only `edge_cookie::generate_ec_id`, and the `request_headers` / `request_path` / `request_query` snapshot `EcContext` took at read time to fill them. Leaving state a provider can no longer read would be worse than the accessors themselves. Two test doubles went with them, `CookieCapturingProvider` and `EvidenceCapturingProvider`, along with the two tests that existed to prove the removed accessors carried cookies and query parameters. The third test that used `EvidenceCapturingProvider`, `a_provider_that_reads_no_client_ip_mints_when_the_host_has_none`, tests something else (a provider that needs no client IP still mints on a host that has none), so it stays, now with a `NoClientIpProvider` double that also asserts such a host passes the documented empty string rather than failing. The trait keeps its role as the seam. Its docs, the provider module docs and section 4 of the design now say that further evidence arrives as a defaulted accessor in the change that first reads it, rather than claiming a provider can already read headers, cookies, client hints and the URL. Probe: removing `client_ip` from the trait fails the library build at ec/provider.rs, where `HmacProvider::generate` reads it. Removing the other six failed nothing outside the tests deleted with them, which is the asymmetry this commit is about. Addresses: Aram Grigoryan review of PR 1043, crates/trusted-server-core/src/evidence.rs:27 (thinking)
Every Edge Cookie provider goes through one mechanism and none of them is special, so the selector no longer carries a variant for the built-in HMAC provider. `EcProviderSelection` is now `None` for explicit statelessness and `Named(String)` for a provider chosen by name, and `hmac` is an ordinary name in the same open-ended namespace a vendor crate names its own provider from. A variant per provider wrote the special case into the type, so every match on it had to know that one provider was different, and the built-in provider is due to become a vendor-supplied module rather than living in core. The one place that still knows `hmac` is built into core is the resolution in `build_provider`, lifted into `resolve_named_provider` and commented to say that it goes when the built-in provider becomes a module, after which `hmac` resolves through the injected path like any other name. Nothing else branches on whether a name is built in. `Ec::validate_provider_selection` is now a name lookup through the new `EcProviders::has_block`, and the unreferenced-block check reads the new `EcProviders::configured_keys` rather than pushing `hmac` in by hand, which also drops `has_vendor` and `vendor_keys`, both of which only answered for names that are not built in. `EcProviderSelection::HMAC_KEY` becomes the module-level `HMAC_PROVIDER_KEY` beside `HMAC_PROVIDER_CODE`, because the selection type should not name any one provider. The configuration surface does not change. `[ec] provider = "none"`, `"hmac"` and any vendor key parse to the same behavior and are written back as exactly the same string, which the round-trip test now proves on the serialized scalar itself rather than only on the surrounding document text. This is not the reviewer's finding about scattered string literals, which the typed selector already fixed. It is the project's own rule that no provider is special.
The response EC finalization edits is the finished one, so it already carries whatever the publisher's origin returned. The provider-header loop used `HeaderMap::insert`, which drops every existing value for that name, so a provider setting one evidence cookie deleted every `Set-Cookie` the origin had written, a publisher's session and sign-in cookies included, and a provider setting `Vary` deleted the origin's. `response_headers` is a list of pairs precisely so a provider can set more than one cookie, and `insert` collapsed those too. The rule, written out on the new `apply_provider_response_headers`, is that this seam is additive. A provider only ever adds evidence about the request, it never corrects the origin's output, so core has no grounds to discard a value it did not write. `Set-Cookie` can never be folded into one field line, the list-valued headers a provider realistically sets (`Vary` above all) mean the union of their field lines, and the single-valued headers where replacing would be right are exactly the ones `reserved_response_effect` already fails the request for. So nothing a provider may set here needs to replace, and appending is the direction that cannot silently destroy someone else's header. No test anywhere covered a provider header reaching a response. The new one drives a provider that sets its own cookie and its own `Vary` through the real mint path onto a response the origin has already written to, and asserts the origin's cookie, the provider's cookie, core's own `ts-ec` and both `Vary` entries all survive.
The pluggable-providers spec required, in its provider-switching section,
that switching must not strand the identities the previous provider
minted and "above all must not make a later opt-out unable to revoke
them". It then claimed old cookies stay recognized after a switch
whenever the newly selected provider accepts their shape.
That claim is false and cannot be made true here. Ownership is decided on
the `{code}~` prefix before any provider is asked about shape, and the
check is enforced twice: `AcceptedProviders::owner` dispatches on the
code, and `canonical_kv_key` re-checks the derived key through
`provider_owns_id`. So a newly selected provider rejects every identifier
the previous one minted, whatever its shape. The new test drives this and
shows the result: after a switch the retired identifier is never adopted,
withdrawal still expires the browser cookie, but the retired provider's
identity-graph row keeps `consent.ok = true` and is never tombstoned. It
then sits for the one-year entry TTL.
I changed the spec rather than the code. The mechanism the spec itself
names for carrying identities across a switch is the `legacy_providers`
reader list, which the same section marks as deferred to the migration
spec, and `AcceptedProviders` is already built as the seam for it. Even
once it lands the requirement would not hold on its own, because it would
depend on the operator listing the retired provider, so an unconditional
guarantee was never something the code could provide. The old wording
also contradicted section 5 of the same document, which already states
the true rule that a cookie carrying another provider's code is treated
as absent.
The replacement says plainly what a switch does to read-back, to the
browser cookie and to the graph rows, and what an operator must do about
revocation: deal with the retired provider's rows at the switch, since
they are identifiable by that provider's `{code}~` key prefix, or accept
that later withdrawals are recorded only in the browser until the TTL
expires. The `cookie_ec_kv_key` doc comment claimed the same reach the
spec did and is corrected to match.
The provider series design specs move to the spec-only PR (IABTechLab#1084) so they can be reviewed before the code that implements them. Three doc comments cited those files by repository path, which no longer resolves from this branch. Refer to each document by name instead, so the comment stays true whichever PR is read first.
The mint-rejection fix restored one collapsed continuation in ec/mod.rs and said the rest of that file was clean, which it was. The same fault exists in four more places on this branch, so fixing only the reported one leaves the pattern half addressed. Each was written across two source lines without the trailing backslash, so the source indentation became a run of spaces inside the message: ec/admin.rs:373 the invalid-EC-ID response an operator sees ec/finalize.rs:125 the skipped-response-write log line ec/provider.rs:635 the missing-client-IP error from the HMAC provider ec/pull_sync.rs:72 the skipped-dispatch log line integrations/testlight.rs:196 the no-recognized-EC-ID error The continuation is restored in each, so every message reads as one sentence. The whole of trusted-server-core was scanned for the same shape, matching runs of five or more spaces inside a string literal. The only remaining matches are TOML fixtures in settings.rs tests, where the embedded newlines are deliberate. Addresses: ec/mod.rs:444 follow-up, the same fault outside the file first reported
The commit that rewrote the module docs to match the trait signature left two item-level doc comments in the same file still describing constructor injection, so the claim that nothing passes evidence by constructor was contradicted three declarations further down. IdentityInput's doc said request data reaches a provider "through the services injected into its constructor". EdgeCookieProvider::generate's doc said the identifier is derived "from the provider's injected services". Neither matches the signature, which takes request_info: &dyn RequestInfo as a parameter and reads evidence from it. The built-in HMAC provider does exactly that at ec/provider.rs:632. Both now describe the parameter the evidence actually arrives on. The crate was searched for the same wording; the only other mention is in ec/mod.rs on a test-only helper, where it correctly describes how the provider itself is constructed rather than how request evidence reaches it. Addresses: ec/provider.rs:4 follow-up, item docs still describing constructor injection
`ProviderCode::new` is public and validated its argument with `assert!`, so any caller outside this workspace could take down a live request by passing a code that was not exactly four characters of [a-z0-9]. The doc comment claimed the panic "never" fires on a request path, which held only for as long as every caller happened to pass a literal, and nothing enforced that. A vendor Edge Cookie provider is exactly the caller the claim could not cover. `new` now returns `Option<ProviderCode>`, so it cannot panic whatever it is given, and a caller outside core has to handle a malformed code. The compile-time guarantee the codes in this workspace relied on moves into a new `provider_code!` macro, which runs the same check inside a `const` block, so a bad literal fails the build and the value it yields needs no unwrapping. Every code in the workspace, the built-in HMAC code included, now goes through the macro. Addresses: crates/trusted-server-core/src/ec/provider.rs, where `ProviderCode::new` could panic at run time while its documentation said it could not.
`resolve_named_provider` looked for a built-in provider before the one the adapter injects, so a vendor provider whose id is `hmac` was dropped in favour of core's own and nothing said so. Nothing reserved the name and nothing warned, which left an operator with a configured vendor provider that never ran and no way to see why. This is not only a missing warning. Once this work merges, IAB Tech Lab is itself a vendor shipping an HMAC provider while core still ships one, so two suppliers really can arrive under one name in a single deployment, and there is no correct way to pick between them. `build_provider` now refuses that pair through `ensure_no_name_collision` and the error names both claimants, core and the deployment's adapter, along with the contested name. The check runs before the selector is read, so selecting a different provider does not hide the clash, and because the adapters call it through `ensure_provider_available` while they build application state, an operator is told at startup rather than on the first request that happens to select the name. Addresses: crates/trusted-server-core/src/ec/provider.rs, where `resolve_named_provider` silently preferred the built-in `hmac` provider over an injected one of the same name.
`EC_RESPONSE_HEADERS` in the EC finalization module and the first four entries of `INTERNAL_HEADERS` in the constants module were the same four header names written out twice, in two files, with nothing keeping them in step. The two lists do different jobs, one is stripped from a response the request may not carry an identity on and the other is never forwarded to a third party, but every Edge Cookie output header has to be in both, so adding a fifth to one and forgetting the other would send Edge Cookie output to an origin that should never see it. `EC_RESPONSE_HEADERS` now lives once, in the constants module, and `INTERNAL_HEADERS` is assembled from it and the remaining internal names while the crate is compiled, so the Edge Cookie half cannot be edited in one place and missed in the other. EC finalization reads the same constant instead of keeping a copy. The new test in the constants module asserts the containment, the total, and that no name appears twice, so going back to two hand-written lists fails the build. Addresses: crates/trusted-server-core/src/ec/finalize.rs and crates/trusted-server-core/src/constants.rs, where one list of Edge Cookie response headers was maintained by hand in two places.
The composition root resolved `[ec] provider` and threw the provider away, keeping only the knowledge that the selection could be satisfied, and then the request path resolved the same settings again to get a provider it could use. On the Fastly, Cloudflare and Spin adapters that is twice for every request, because those three run a fresh instance per request and rebuild application state each time, which was confirmed by reading `run_app` in the matching edgezero adapters. The composition root now keeps what it resolved, in `AppState`, and hands the same instance to every request through the new `RuntimeServices::resolved_ec_provider`. Core reads it through `request_provider`, which returns the threaded instance when there is one and otherwise resolves exactly as before, so an adapter that threads nothing, the core tests and any embedder driving core directly included, keeps today's behaviour, the loud failure on a selected but uninjected provider included. Nothing about which provider is chosen changes, only how many times the choosing happens. The Axum adapter is deliberately left checking rather than keeping, because it is a long-lived process whose application state is built once at start-up, so it has no second resolution to save. Addresses: crates/trusted-server-core/src/ec/provider.rs and the Fastly, Cloudflare and Spin adapters, where `ensure_provider_available` and `EcContext::read_from_request` each built the provider once per request.
The Spin adapter cannot start on upstream/main today, and this fixes it here. `build_state` compiled `trusted-server.example.toml` into the binary and parsed it, but that template ships placeholder secrets by design and its placeholder admin password is the first entry in `PASSWORD_PLACEHOLDERS`, so `validate_admin_handler_passwords` refused it every time. `build_state` therefore never returned `Ok`, the router fell back to the start-up error handler, and the component answered 503 to every request. The failure is "Handler `^/_ts/admin` uses a placeholder password; configure a strong secret". Nothing caught it because nothing called `build_state`. Every Spin test enters through the `routes_with_settings` parity seam and supplies its own settings, so the one path a deployed component actually takes was the one path never exercised. Settings now come from the platform config store at run time, which is what the Fastly, Axum and Cloudflare adapters already do, so an operator publishes one with `ts config push` and the component reads it. The new `SpinPlatformConfigStore` reads Spin component variables directly rather than through the per-request handle, because application state is built before any request context exists. Component variables are ambient, which is how the secret store already reads them, and both paths map keys through `spin_variable_name` so start-up and the request path read the same variable for the same key. The new test calls `build_state` and requires any failure to be the absence of a config store. Outside the Spin runtime there are no component variables, so it cannot return `Ok` under `cargo test`, but a configuration compiled into the binary would fail for a different reason and the test says so. Restoring the old body fails it with the placeholder-password message. Addresses: crates/trusted-server-adapter-spin/src/app.rs, where `build_state` parsed a baked example template whose placeholder admin password made every request fail.
`get_ec_id` is public on upstream/main today and this fixes it here. It
reads the `x-ts-ec` request header and then the `ts-ec` cookie, and
checks the result only with `ec_id_has_only_allowed_chars`. That function
is the global cookie backstop, the length cap and the cookie-safe
alphabet, and its own documentation in `ec/cookies.rs` says the strict
check is the one used to reject untrusted request values. On its own it
accepts any run of `[A-Za-z0-9._~-]` up to the cap, so it cannot tell an
identifier this deployment minted from one an attacker typed. `x-ts-ec`
is stripped from responses but not from inbound requests, so the header
really is the client's to set, and the raw reader prefers it over the
cookie. This is the inbound twin of the egress fault this branch already
fixes, which is why it belongs here.
The right check is not the built-in strict format validator. A vendor
provider's identifier is not required to match the HMAC
`<64 hex>.<6 alphanumeric>` shape, so holding every deployment to it
would drop exactly the opaque identifiers the provider model exists to
carry. The right check is provider ownership, where the `{code}~` prefix
is dispatched to the provider that owns it and that provider's
`accepts_id` decides, which is what `recognized_ec_id` already does and
what the EC lifecycle applies on read-back.
The raw reader cannot make that check, because it has neither settings
nor the selected provider, so it stops being a public entry point. It is
now `pub(crate)` and named `unvalidated_ec_id_from_request`, so no caller
can read it as returning a validated identifier, and `recognized_ec_id`
is the only way in from outside the module. Nothing outside the crate
called the old name.
The new test drives three identifiers this deployment could never have
issued through both readers, shows the bounds alone accept all three,
and requires the public path to recognize none of them, while an
identifier the selected provider does own is still returned. Replacing
the ownership check with the bounds fails it on the first one.
Addresses: crates/trusted-server-core/src/edge_cookie.rs, where
`get_ec_id` was public and validated client-supplied identifiers with the
outbound backstop list.
Reverts the removal of the request-evidence accessors, so RequestInfo carries the client IP, the User-Agent, headers by name, header names, the path, the query and its parameters again. They were removed to satisfy a rule in our own specification, which says every trait method needs a production caller in the change that introduces it. That rule is right for a behavioural trait, where a method nothing calls is dead weight. It is wrong for an evidence interface, and applying it here was our mistake rather than anyone else's. An evidence interface describes what a request carries, not what today's code happens to read. Held to the caller rule it grows a method every time a vendor arrives, so no vendor can write against it and it cannot stay stable across a release. It also puts the boundary in the wrong place, because what a provider may see was never the control. What a provider may do with what it sees is the control, and that is the permission model. The specification is amended in the same series rather than quietly ignored. Two test provider codes restored with the revert predate ProviderCode::new returning an Option, so they now build through the macro that cannot fail. Addresses: crates/trusted-server-core/src/evidence.rs, an evidence interface narrowed to today's callers
Fixes doc comments, error strings and TOML comments on split/1 so they match the code they describe, and applies house-style wording rules to every added line touched. Continues and completes work a prior agent started (which stopped partway through the B3 item list), reviewed against the run books at .claude/pr1/runbook-track-1-code-chain.md and .claude/pr1/comments-docs-runbook.md in the trusted-server repo. F2 (verified, already done by the prior agent): added "cache-control" to FRAMING_OR_HOP_BY_HOP_HEADERS in ec/provider.rs with a regression test, and removed the false reference to a per-adapter is_hop_by_hop_response_header function. B3.9 (verified, already done by the prior agent): recorded, rather than fixed, the gap where pull sync (ec/pull_sync.rs) and the admin lookup (ec/admin.rs) key identity-graph rows by the raw identifier instead of the canonical form the three organic paths use. A doc comment on EcContext::kv_key_for and AcceptedProviders now names the gap and points at commit 343ac3e, which fixed the three organic paths. Recorded as a known issue for a later change rather than changed now, because routing these two paths through the canonical key this late changes behavior. Wrong-claim and stale-reference fixes (runbook Part B3, items 1-25): verified each item against the current tree. Most were already corrected by the prior agent (HmacProvider failure handling, the environment-variable override claim, EcProviders selection docs, provider construction timing, BorrowedRequestInfo allocation, the generate_if_needed and validate_provider_selection # Errors lists, the retirement-arithmetic doc, kv_key_for, ec_allowed, request_headers, edge_cookie.rs recognized_ec_id, admin.rs and cookies.rs identifier grammar, IdentityInput gating, and the plural "built-in providers" wording in platform/types.rs). This pass added the one remaining fix: crates/trusted-server-adapter-spin/src/app.rs no longer claims Cloudflare reads settings the same way as Fastly and Axum (Cloudflare also reads a JSON binding and compiles in the example TOML natively). House-style sweeps (runbook Part C), restricted to lines split/1 added over upstream/main d516a9e, verified per line via git diff before editing: - "mint"/"minted"/"mints" -> "create"/"created"/"creates" (or "issue"/ "derive" by sense) in doc comments, inline comments and expect()/ assert messages across ec/provider.rs, ec/mod.rs, ec/admin.rs, ec/batch_sync.rs, ec/cookies.rs, ec/finalize.rs, ec/generation.rs, ec/identify.rs, ec/pull_sync.rs, edge_cookie.rs, integrations/testlight.rs, platform/test_support.rs, proxy.rs, and crates/trusted-server-adapter-fastly/src/app.rs. Left the `mint: bool` test-builder struct field name alone (an identifier, not prose), and left every "mint" occurrence that predates split/1 alone (confirmed against upstream per file before editing; two lines were edited by mistake and then reverted once the upstream check showed they were pre-existing text, not split/1 additions). - "initialise" -> "initialize" in the four adapters' build_state / build_state_with_settings doc comments. - "several" -> "multiple" in ec/generation.rs. - "HTTP/2 fingerprint" -> "TLS and HTTP/2 signal" in ec/generation.rs. - "built-in HMAC default" -> "built-in HMAC provider" (there is no default provider) in crates/edgecookie/README.md. - Environment variable casing: TRUSTED_SERVER__ec__provider -> TRUSTED_SERVER__EC__PROVIDER in trusted-server.example.toml, to match settings.rs and the documented upper-case form. - Bytes vs characters: trusted-server.example.toml's new [ec.providers.hmac] block comment now says ">= 32 bytes" to match the startup error message, which counts bytes. - A8 cargo-feature overclaim: trusted-server.example.toml no longer says a vendor provider "needs its own cargo feature" (none exists); it now says a vendor provider ships in its own crate the adapter composes in. - A15 environment-loading overclaim: trusted-server.example.toml's [ec] block comment now matches settings.rs, saying deployment tooling can merge an environment value into the published configuration before load, and that the running server itself reads settings from the platform config store, not the environment. Also fixed two doc-comment line-wrap glitches left by the prior agent's edits (a stray single-word line in ec/provider.rs's build_provider doc and in settings.rs's Ec::provider doc), where a mid-sentence line break had been left in place after wording changed. Left for a documented human decision rather than changed, per the runbook's own "James decides" note: two em dashes in trusted-server.example.toml:76 and crates/trusted-server-core/README.md that follow an existing dash-separated heading/bullet convention used throughout each file; and the one new "test-publisher.com" test URI in ec/identify.rs, which matches roughly twenty pre-existing (not split/1-introduced) occurrences of the same fixture domain already in that file, so changing only the new one would be inconsistent and changing the rest is outside split/1's introduced lines. Out of scope for this branch, so not touched: the "no host-specific call" overclaim (B1 item 1, on split/2/3), the geo-default docs (A1, on split/6/7), and the drafted GitHub text fixes (A2-A4, A10-A16), all of which live on later branches or in .claude/pr1/ review artifacts. Not built or tested per instructions; verification is deferred to the full-stack gate run after every branch in the chain is rebased. AI assistance note: this commit was produced by an AI coding session that continued a prior AI session's partially completed edits, reading both against the run books named above. A human should review the "James decides" items before the stack is pushed.
…e provider Second slice of the PR 838 decomposition. Device classification and geolocation become selectable providers, mirroring the Edge Cookie provider seam: - [device] provider selects the classifier. The built-in default reads the User-Agent alone and makes no host call; the opt-in fastly provider strengthens the browser/bot gate with the host's TLS JA4 and HTTP/2 signals (crates/device/fastly). - [geo] provider selects geolocation. The host platform's lookup is the default, matching the behavior before the selector existed, and provider = "platform" spells the same choice explicitly (crates/geo/fastly wraps the Fastly host lookup behind the PlatformGeo trait). provider = "none" opts out entirely, so a client IP is never sent to any host geo service. The disabled-by-default flip ships with the permission model in the next slice, which adds the jurisdiction baseline that makes a no-geo deployment viable. - Every adapter routes its host geo through the same build_geo_provider selector: Fastly, Axum, Cloudflare, and Spin all honor [geo] provider identically, so the selector is not a Fastly-only behavior. - The provider configuration sections ([device], [geo], [ec.providers.hmac], [ec.providers.host-signals]) reject unknown keys at startup, so a mistyped key fails loudly instead of silently selecting a default. - The host-signal Edge Cookie provider arrives with the capability it needs: the Fastly adapter injects the TLS/HTTP-2 signals as a HostSignals service, and the provider mints from them plus the client IP. With no host signals at all it defers with a warning rather than degrading to an IP-only identifier. - Device signals move to a field-based DeviceSignals derived in the adapter (derive_ua_only for hosts without host signals). - The new crates join the fastly cargo aliases so they build, lint, and test in CI rather than compiling only transitively.
The geo and device selectors are optional, and both serialized as `"provider": null` when unset rather than being left out. That is invisible today, because the whole section is skipped while every field in it is default. It stops being invisible in the permission model PR, which makes `[geo] default_country` required, so the geo section is always emitted and the null selector goes with it. A pushed config blob then carries a key that a binary predating the selector rejects, which breaks an otherwise unchanged `ts config push` during a rollout or a rollback. That is the same compatibility rule the surrounding fields already follow. Both fields now skip serialization when unset. The test serializes each section directly rather than through Settings, because through Settings the section is skipped as a whole here and the fault would not show until two PRs later. Addresses: crates/trusted-server-core/src/settings.rs, optional selectors serialized as null
The Cloudflare adapter resolves no region on upstream/main today and this fixes it here. `build_geo` read no region header and `CloudflareGeo`'s `lookup` returned `region: None` unconditionally, so no Cloudflare deployment could ever place a visitor in a US state. I traced the consequence rather than assuming it, and it holds. `detect_jurisdiction` in `consent/jurisdiction.rs` reaches its US branch only when the country is `US` and a region is present, so with no region every US visitor fell through to `Jurisdiction::NonRegulated`. In `allows_ec_creation`, the `NonRegulated` arm returns true and never reads `ctx.gpc`, while the `UsState` arm blocks on `ctx.gpc` first and then on a GPP US sale opt-out and the US Privacy string. A US visitor sending Sec-GPC therefore had that opt-out ignored on Cloudflare, and an Edge Cookie was created anyway. The same is true for the GPP and US Privacy opt-outs, because none of them are consulted on the unregulated arm. The region now comes from `cf-region-code`, which is the ISO 3166-2 subdivision code, rather than `cf-region`, which is the subdivision name. The state rules in `[consent.us_states] privacy_states` are written as two-letter codes, so a name would never match one and the fix would look applied while changing nothing. This is a request header, read the same way the adapter already reads `cf-ipcountry` and `cf-ipcity`, and like those it needs the visitor-location managed transform, which the doc comment now says. The new test walks the whole chain in one place, from the header through `build_geo` and `lookup` to `detect_jurisdiction` and then to `allows_ec_creation` with Sec-GPC set, and asserts the opt-out is honored. Putting `region: None` back fails it. Addresses: crates/trusted-server-adapter-cloudflare/src/platform.rs, where `CloudflareGeo::lookup` hardcoded no region and `build_geo` read no region header, so US state privacy signals failed open.
Restoring the evidence accessors added a `with_headers` builder to `OwnedRequestInfo` and `BorrowedRequestInfo`, and on both types it landed between `with_request_target`'s doc comment and the function that comment describes. So `with_request_target` was left undocumented and without its `#[must_use]`, while `with_headers` carried a stray attribute and a comment describing its neighbour. The compiler reported the stray attribute and clippy separately asked for a `#[must_use]` on `with_request_target`, which is the attribute that had been severed from it. Both builders now sit with the documentation and the attribute that belong to them, so a caller that drops either builder's result is caught again. This went unnoticed because the checks run against this branch were `cargo check` and a cached build, neither of which re-reports warnings, and the branch fails `cargo clippy` with warnings denied. It is fixed here rather than further up the stack because this is the change that introduced the builders, so every branch above inherited the fault. Addresses: crates/trusted-server-core/src/evidence.rs, where both `with_request_target` builders lost their documentation and their `#[must_use]`.
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Second of five stacked PRs decomposing #838 as requested in the #986 review. Stacks on #1043 (the Edge Cookie provider seam). Compare
split/2-device-geotosplit/1-ec-providerto see only this PR's change.Spec: shared with #1043: docs/superpowers/specs/2026-07-30-pluggable-providers-design.md covers the whole provider architecture, and its device and geo sections describe this PR.
What this PR does
Device classification and geolocation become selectable providers, mirroring the Edge Cookie seam.
[device] providerselects the classifier. The defaultbuiltinreads the User-Agent alone and makes no host call. The opt-infastlyprovider strengthens the browser and bot gate with the host's TLS JA4 and HTTP/2 signals (crates/device/fastly).[geo] providerselects geolocation. In this PR the host platform's lookup remains the default, matching the behavior before the selector existed, withprovider = "none"as an explicit opt-out that sends no client IP to any host geo service. The flip to no-geo-by-default lands in Add the permission model with the Privacy Taxonomy vocabulary #1045 together with the permission baseline that makes a no-geo deployment viable, so this PR alone changes no deployment's behavior.build_geo_providerselector, so[geo] providerbehaves identically everywhere rather than being a Fastly-only behavior.[device],[geo],[ec.providers.hmac],[ec.providers.host-signals]) reject unknown keys at startup, so a mistyped key fails loudly instead of silently selecting a default.hs00~under the provider-code registry introduced in Add a pluggable Edge Cookie provider seam with the built-in HMAC provider #1043, which fixes the identifier-collision defect the earlier review found (host-signal identifiers previously shared the HMAC grammar and keyspace). The policy question of whether host TLS/HTTP-2 processing ships in the series is put to the task force in issue Host TLS/HTTP-2 signal processing: the separate design sign-off row 22 requires #1071, the separate design sign-off row 22 asks for: our proposal is to close the row with capability opt-in, both uses permission-gated, and the policy expressed in permissions.yaml rather than compiled into the build.How it was verified
Full local gate on this branch, all clean.
cargo test-fastly,cargo test-axum,cargo test-cloudflare,cargo test-spin, the integration parity suite,cargo fmt --check, and all six per-target clippy aliases.References #780 and #781. Decomposes #838. Spec baseline from #986.
Produced with AI assistance under James Rosewell's direction, and flagged here so reviewers know to apply the usual scrutiny.
CodeQL note
CodeQL reports one high alert on this PR and the three above it, at
crates/trusted-server-core/src/ec/mod.rs:367, saying a value derived from.secret_store(...)is written to a log. The line logs the resolved jurisdiction enum. CodeQL's cleartext-logging query treats the pre-existingRuntimeServices::secret_storeaccessor as a secret source by its name and taints the wholeEcContextbuilt from those services, so any field of it that reaches a log is reported. No passphrase or secret is logged anywhere on this path, and the passphrase fields areRedacted<String>. The same query flagged eleven lines on #1043 for the same reason until the migration method was renamed; this remaining one is on an upstream accessor the series does not own. Happy to restructure if the maintainers prefer a code change to a dismissed alert.