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docs(arch): multi-credential PeerEntry, resolve OQ-29, dissolve OQ-35, add OQ-37

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Amend ADR-030 with three changes from the auth-type analysis:

1. PeerEntry is now multi-credential: fingerprints: Vec<String> (Ed25519
   and/or X.509) + auth_token_hash: Option<String> (bearer token). All
   resolve to the same peer_id. A peer that authenticates via Ed25519
   today and via auth_token tomorrow gets the same PeerId. The 'peer
   bearer vs auth bearer' distinction was wrong — the correct framing is
   the three credential types (Ed25519, X.509, bearer token) and whether
   the token needs a stable logical id across rotation (PeerEntry) or not
   (ApiKeyEntry).

2. Fingerprint normalization (§6): quinn extracts the raw Ed25519 public
   key from the SPKI cert and formats as ed25519:<hex>, matching iroh.
   The same key has the same fingerprint regardless of transport. X.509
   fingerprints stay as SHA256:<hex of DER>. This also simplifies the
   coming WebTransport relay work.

3. The 'API keys' section is replaced with 'Bearer tokens' — correctly
   framing the three auth types and the two bearer-token paths
   (PeerEntry.auth_token_hash vs ApiKeyEntry).

Resolve OQ-29 (CallClient TLS client-auth): wire quinn client-auth (present
Ed25519 key as raw public key client cert — the server-side extraction
already works); key-type-aware server cert verification (raw key =
fingerprint match, X.509 = CA verification via WebPkiServerVerifier —
AcceptAnyServerCertVerifier is only safe for raw keys); fingerprint
normalization. The iroh path already works (RFC 7250 raw keys, both sides
exchange automatically); the gap was quinn-only.

Dissolve OQ-35: the 'API key asymmetry' framing was wrong. PeerEntry
supports multiple credential paths; ApiKeyEntry is for tokens that ARE the
identity.

Add OQ-37: X.509 outgoing-only case — the three auth types and how X.509
server identity fits the peer model. Not blocking the ADR-029 migration;
downstream (HTTP crate phase).

Update auth.md, config.md, client-and-adapters.md, call/README.md,
core/README.md, open-questions.md, README.md, and call_client.rs source
comment.

Workspace green: 326 tests pass, build clean.
This commit is contained in:
glm-5.2
2026-06-28 08:49:36 +00:00
parent 1d94aaea51
commit 7d812af8f4
9 changed files with 385 additions and 229 deletions
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4
docs/architecture/crates/call/README.md
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@@ -57,12 +57,14 @@ Structured RPC over QUIC: operations, request/response, streaming subscriptions,
| OQ-26 | OperationAdapter error type (AdapterError variants) | **resolved** | `DiscoveryFailed`, `SchemaParse`, `Transport`, `Unauthorized`, `SamePeerCollision`; `#[non_exhaustive]` |
| OQ-27 | from_call re-import trigger | **resolved** | Auto-re-import on connection establishment; `refresh()` is a feature addition |
| OQ-28 | from_call namespace collision | **resolved** | Same-peer collision = error; cross-peer dissolved by ADR-029 (separate sub-overlays) |
| OQ-29 | CallClient TLS client-auth | **open (high, load-bearing on ADR-030)** | NOT "additive" — activates the `PeerEntry` fingerprint → `peer_id` path. Requires decision before ADR-029 migration. |
| OQ-29 | CallClient TLS client-auth | **resolved** | Wire quinn client-auth; key-type-aware server cert verification; fingerprint normalization |
| OQ-30 | `PeerRef::Any` routing policy | **resolved** | Insertion-order first-match; richer routing is a feature extension |
| OQ-31 | `services/list-peers` re-export semantics | **resolved** | Opt-in `services/list-peers`; `services/list` is "own ops only" |
| OQ-32 | Multi-hop federation | open (feature extension) | One-hop model is the commitment; multi-hop is a feature extension, not a deferral |
| OQ-33 | PeerId — crypto identity vs stable logical id | **resolved** (ADR-030) | `PeerId = Identity.id = PeerEntry.peer_id` (stable across key rotation) |
| OQ-34 | Persistent peer registry | **resolved** (ADR-030+033) | Core trait + in-memory default; persistence adapters are separate crates |
| OQ-35 | ~~API key asymmetry~~ | **dissolved** | `PeerEntry` supports multiple credential paths; `ApiKeyEntry` is for tokens that ARE the identity |
| OQ-37 | X.509 outgoing-only case | open | Three auth types; how X.509 server identity fits the peer model. Not blocking. |
## Key Design Principles