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Give native devices a chip key, a certificate and attestation (R74) - #130
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…record the level in the certificate
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Included review availability: This review used your included allowance. Your plan provides up to 1 included review per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThis change adds device identity across the core protocol, client, and server. It includes platform key storage, certificate enrolment and revocation, Android and Apple attestation, offline CA commands, and demo and CI support. ChangesDevice identity and certificate contracts
Priority: ➖ Normal Estimated code review effort: 5 (Critical) | ~120 minutes Change: Feature Sequence Diagram(s)sequenceDiagram
participant NativeClient
participant ServerSession
participant DeviceEnrolment
participant EnrolmentStore
NativeClient->>ServerSession: request challenge and submit enrolment request
ServerSession->>DeviceEnrolment: process challenge, CSR, descriptor, and attestation
DeviceEnrolment->>EnrolmentStore: record device and certificate
DeviceEnrolment->>ServerSession: return grant and signed revocation lists
ServerSession->>NativeClient: send enrolment response
Merge Risk: 🔵 Low · up to The new device identity, enrolment and revocation changes show no open functional or security defect in this pass. The remaining items are small hygiene and hardening points: a lint warning, root-key memory handling and git dependency pinning. They are worth cleaning up, but they are unlikely to cause a production failure. Caution Pre-merge checks failedPlease resolve all errors before merging. Addressing warnings is optional.
❌ Failed checks (1 error, 4 warnings)
✅ Passed checks (7 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 70.74% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 646 functions across 52 files. (2 skipped: 2 unsupported.) Full details: Git Dependency Pin Stays Out Of CommitsExplanation The PR modifies the root Full details: Crate Readme Is The Crate DocumentationExplanation The PR adds Full details: Pre-Alpha Has No DeploymentsExplanation The workspace version is Full details: Prose PunctuationExplanation The added error message in ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Codecov Report❌ Patch coverage is Additional details and impacted files@@ Coverage Diff @@
## main #130 +/- ##
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+ Coverage 85.58% 86.40% +0.82%
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Files 147 163 +16
Lines 35323 39726 +4403
Branches 35323 39726 +4403
==========================================
+ Hits 30230 34324 +4094
- Misses 3410 3526 +116
- Partials 1683 1876 +193
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Actionable comments posted: 13
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @crates/connetto-ca/Cargo.toml:
- Line 12: Remove the redundant homepage.workspace entry from the package
metadata in Cargo.toml, leaving repository.workspace unchanged.
Review comments at @crates/connetto-ca/src/lib.rs:
- Line 129: Update open_root to wrap the decrypted root-key DER bytes in
Zeroizing before passing them to KeyPair::try_from, and use the wrapped bytes
for parsing so the decrypted key buffer is cleared when dropped.
Review comments at @crates/connetto-client/Cargo.toml:
- Line 44: Keep the lockfile consistent with the Git-pinning invariant: pin the
git sources for diesel-sqlite-session and pg2sqlite to explicit revisions or
tags, or revert the lockfile change. Locate these dependency declarations
alongside the device-identity feature in the manifest.
Review comments at @crates/connetto-client/src/device_key/android.rs:
- Around line 274-280: Update the certificate iteration to remove both integer
`as` casts: keep the JNI array length and loop index as `jsize`, and use
`usize::try_from` when sizing `certificates`. Preserve the existing
array-element lookup behavior without adding unrelated changes.
Review comments at @crates/connetto-client/tests/it/enrolment.rs:
- Around line 174-176: Update the fixed `ROTATION` initializer in `rotation()`
to use `LazyLock<Rotation>` and return a reference to the lazy static, replacing
the `OnceLock::new` and `get_or_init` pattern.
Review comments at @crates/connetto-server/src/builder/mod.rs:
- Around line 1235-1236: Update the status-list task started by `list.spawn()`
so its handle is wrapped in `BackgroundTask` and stored in `ServerHandle`
alongside `lag_watch` and `sweep`; stop it in `ServerHandle::shutdown` so
rebuilding or dropping server parts does not leave the fetch loop running.
Review comments at @crates/connetto-server/src/device_cert/attestation.rs:
- Around line 551-560: Update der_tlv to compute the total DER field length
using checked arithmetic and return None if either addition overflows. Preserve
the existing bounds check and DerField construction for valid lengths.
- Around line 217-225: Update max_age to enforce a minimum fetch period of 60
seconds, including when the parsed max-age is zero; keep the spawn loop’s use of
the returned period unchanged.
- Around line 386-390: Update the key-description selection in the attestation
flow to use the extension nearest the root, not the first extension found from
the leaf. Require that trusted extension to be on certs[0]; if it appears only
on another certificate, return an unproven record. Parse the description from
the leaf extension when present.
- Around line 342-344: Replace each single-purpose error struct with a
`thiserror::Error` enum: make `AttestationMismatch` in `attestation.rs`
distinguish key, challenge, nonce, chain, and layout refusals; make
`KeystoreFailure` in `android.rs` represent Java and missing-VM failures while
retaining their messages; and make `EnclaveFailure` in `apple.rs` an enum
variant retaining its code and message. Update the corresponding error
construction sites to use the appropriate variants.
Review comments at @crates/connetto-server/src/device_cert/enrolment.rs:
- Around line 580-591: Update the `Revocation::AlreadyRevoked` path in the
revoke flow so retries still publish fresh lists and return the stored session
for the remaining revocation side effects. Adjust `MemoryEnrolments::revoke_now`
and `PgEnrolments::revoke` to provide that session for already-revoked keys, and
update `Revocation` and its callers to carry it through.
- Around line 87-98: Replace EnrolmentError(String) in EnrolmentError with a
thiserror enum containing distinct variants for pool, Diesel query, descriptor
codec, and list-signing failures; preserve those sources through the revoke flow
instead of converting them to RevokeError::Unavailable(String). In
crates/connetto-server/src/device_cert/enrolment.rs:87-98, update EnrolmentError
and its call sites accordingly. In
crates/connetto-server/src/device_cert/mod.rs:86-92, replace LifetimeRefused
with a thiserror enum variant such as LifetimeError::OverCeiling { ceiling },
and update its uses.
Review comments at @crates/connetto-test-harness/Cargo.toml:
- Around line 26-27: Keep Cargo.lock unchanged while the workspace has a Git
dependency on pg2sqlite pinned only to branch main; do not regenerate or commit
a lockfile update as part of the change.
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Cargo.lockis excluded by!**/*.lockcrates/connetto-server/src/device_cert/apple_root.pemis excluded by!**/*.pemcrates/connetto-server/src/device_cert/google_roots.pemis excluded by!**/*.pemexamples/dioxus-desktop-demo/Cargo.lockis excluded by!**/*.lock
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…ions and type the device errors
…over without a rollout
LucaCappelletti94
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This is the first of the peer-sync phases designed in #113. Every native client signed in on a platform keyring now holds a P-256 device key in the security chip (the Secure Enclave, the Android Keystore or a Windows TPM, with a software key in the keyring where no chip is usable) and enrols it with the server for a short-lived certificate under the deployment's own CA, whose root
connetto-cakeeps offline. The client renews past half-life, reports a lost device from any of the account's sessions, takes signed revocation lists through one intake that refuses replays, drops a certificate whose issuer the root revoked, enrols a fresh key when its key record is gone, and tells the application when its clock puts the certificate outside its window. Each certificate also records what the device proved at its first enrolment:chip-provenwhen Google's attestation chain shows the key in the phone's secure hardware, checked against Google's roots and its live status list,app-attestedfor Apple's App Attest under the App IDs the deployment lists, andunprovenotherwise, with the deployment choosing which levels it accepts. Enrolments live in the deployment's own tables as theEnrolmentsmember of theConnettoSchemafrom #126.App Attest's methods stay
unsafein objc2, since Apple's first call is not thread-safe (madsmtm/objc2#869) and reading their results needs madsmtm/objc2#837, soconnetto-app-attestis the workspace's one crate allowedunsafe. It holds one process-wide lock around each attestation, and every other crate keepsforbid(unsafe_code). The desktop demo turns all of this on through adevice-identityfeature under a CA its stack mints. The full Android proof passed with it on the CI-shaped emulator, which recordsunproven, and on a Galaxy A35, which recordschip-proven. Key creation, signing and deletion were also proven on an iPhone and on a Windows TPM, whose key rides thefuturebranch of thewindows-native-keyring-storefork until open-source-cooperative/windows-native-keyring-store#19 lands.Some of the phase is not here. The attestation extension sits under RFC 5612's documentation enterprise number until IANA assigns connetto's own, and the server says so at startup. No iPhone has enrolled as
app-attestedyet, which needs the demo's development profile regenerated with the App Attest capability, and a Mac can never App Attest. The peer half of the clock rule and the peer-to-peer revocation proofs come with R76. The decisions, with what each rejected, are R74's section ofplans/master-implementation-plan.md, and chapter 19 marks what is built.Native clients lacked a deployment-bound device identity, so the server could not issue certificates for devices or revoke lost devices. The change adds device keys backed by secure hardware when available, with keyring storage as a fallback. It also adds certificate enrolment, configurable attestation requirements, and deployment-owned enrolment storage.
The offline CA keeps the root key separate from server operations. Signed revocation lists, issuer rotation, and certificate renewal support the device lifecycle. Peer-side certificate-time checks remain deferred, and the iPhone App Attest proof is not yet complete.