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Both bindings run the same cachekit-core AES probe that cachekit-py surfaces as hardware_acceleration_enabled, but neither exposed it, so the answer to "is AES hardware-accelerated here?" was unreachable from TypeScript. TenantKeys.hardwareAccelerationEnabled() on the NAPI and wasm bindings delegates to core; EncryptionManagerCore.isHardwareAccelerated() surfaces it, initialising on demand so it answers at startup, and returns null (unknown) rather than false when an older binding predates the accessor. On wasm32 it is honestly false — no AES instructions to detect. Informational only — crypto dispatch is unchanged. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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Estimated code review effort: 2 (Simple) | ~10 minutes Sequence Diagram(s)sequenceDiagram
participant Caller
participant EncryptionManagerCore
participant EncryptionTenantKeys
Caller->>EncryptionManagerCore: call isHardwareAccelerated()
EncryptionManagerCore->>EncryptionManagerCore: initialise bindings if needed
EncryptionManagerCore->>EncryptionTenantKeys: call hardwareAccelerationEnabled()
EncryptionTenantKeys-->>EncryptionManagerCore: return boolean or unavailable
EncryptionManagerCore-->>Caller: return boolean or null
Merge Risk: ⚪ Minimal · up to The binding and manager behavior match the documented API, and the README cleanup is addressed. The change is mergeable with normal checks. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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In `@packages/cachekit/src/encryption/manager-core.ts`:
- Line 361: Re-check disposal in isHardwareAccelerated after await
ensureInitialized() and before accessing tenantKeys, throwing the documented
EncryptionError when disposed or tenantKeys is unavailable. Add a regression
test covering disposal of an initialized manager before the method continuation
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packages/cachekit-core-ts/index.d.tspackages/cachekit-core-ts/src/lib.rspackages/cachekit-core-wasm/index.d.tspackages/cachekit-core-wasm/src/lib.rspackages/cachekit/README.mdpackages/cachekit/src/encryption/manager-core.test.tspackages/cachekit/src/encryption/manager-core.tspackages/cachekit/test/integration/encryption-real-crypto.integration.test.tspackages/cachekit/test/workers/encryption.protocol.workers.test.ts
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…AB-523) Review found the same per-architecture narrative restated across the bindings, the manager, and the README, and it mis-described aarch64: core tests NEON there, which every aarch64 target enables, so the flag is true on every aarch64 build regardless of the Crypto Extension. Binding and JSDoc comments now state only what the SDK owns — forwards core, informational, null means the binding predates the accessor — and the README carries one dated per-architecture line with the honest aarch64 caveat. The mock test drops two assertions already covered by the ensureInitialized() suite.
…dwareAccelerated isHardwareAccelerated() documents @throws EncryptionError when the manager is disposed, but read tenantKeys through a non-null assertion. On an already-initialised manager ensureInitialized() returns early, so a dispose() landing while the call is suspended at the await left the continuation reading a null tenantKeys and throwing TypeError instead. encrypt() and decrypt() convert the same null read inside their catch; this path has none, so it now checks explicitly. Adds a regression test that disposes an initialised manager mid-call and asserts EncryptionError (it fails with TypeError without the guard).
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Inline comments:
In `@packages/cachekit/README.md`:
- Around line 461-462: Update the README text describing isHardwareAccelerated()
to say “installed binding” instead of “installed native binding,” while
preserving the documented null behavior when hardwareAccelerationEnabled is
absent, including for older wasm bindings.
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…LAB-523) The README said `null` is returned only when "the installed native binding" predates the accessor, but `hardwareAccelerationEnabled?.() ?? null` in manager-core.ts is binding-agnostic: an older wasm binding hits the same path. The accessor's own JSDoc already says "installed binding"; this aligns the README with both the implementation and that doc comment.
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…of NEON (LAB-4650) (#77) ## Problem `ZeroKnowledgeEncryptor::detect_hardware_acceleration()` on aarch64 without a compile-time `aes` target feature returned `cfg!(target_feature = "neon")`. NEON is a default target feature on every aarch64 target (`rustc --print cfg --target aarch64-unknown-linux-gnu`), so `hardware_acceleration_enabled()` was a compile-time constant `true` on every aarch64 build. Cortex-A72-class parts (Raspberry Pi 3/4) have NEON but no Crypto Extension: they reported "hardware accelerated" while `ring` ran software AES. The one platform class where the flag is useful for triage is the one where it answered wrong. ## Change - The aarch64 branch now uses `std::arch::is_aarch64_feature_detected!("aes")` (stable since Rust 1.60; MSRV is 1.85). The compile-time `#[cfg(target_feature = "aes")] → true` short-circuit is unchanged. - First unit test for the flag: `test_hardware_acceleration_matches_platform_probe` pins `hardware_acceleration_enabled()` to the platform's own runtime probe on x86/x86_64 and aarch64. Both `std::arch` probes fold to const `true` when `aes` is enabled at compile time, so the same assertion covers the short-circuit path (verified locally with `RUSTFLAGS="-C target-feature=+aes"`). - Docs: `OperationMetrics::hardware_accelerated` claimed acceleration "was used (for SHA, AES, etc.)"; it now says what the bool is (the CPU reports AES hardware; informational, the crypto backend dispatches on its own). The module doc names the Armv8 Crypto Extension alongside AES-NI. Crypto dispatch is unchanged; the flag stays informational. ## Verification - `cargo fmt --check`, `cargo clippy --all-features -- -D warnings`, `cargo test --all-features`, `cargo test --features ffi`, `cargo doc --all-features --no-deps`: green on x86_64. - The macOS arm64 CI lane compiles the short-circuit (`aes` is a default feature on `aarch64-apple-darwin`), not the new probe line. The probe expression was compiled for `aarch64-unknown-linux-gnu` with `rustc --emit=metadata` and passes clippy `-D warnings` there in a scratch crate; a bogus feature name fails to compile, so the feature string is checked at build time. ## Downstream cachekit-rs, cachekit-ts and the protocol matrix currently document the aarch64 behaviour as "`true` on every aarch64 build (NEON check)" dated to core 0.6 ([cachekit-rs#80](cachekit-io/cachekit-rs#80), [cachekit-ts#132](cachekit-io/cachekit-ts#132), [protocol#68](cachekit-io/protocol#68)). Those caveats can be retired once this ships in a core release. <!-- This is an auto-generated comment: release notes by coderabbit.ai --> ## Summary by CodeRabbit - **Bug Fixes** - Improved detection of AES hardware acceleration on Arm64 devices by checking the processor’s AES capability directly. - Hardware acceleration reporting now more accurately reflects platform support. - **Documentation** - Documented Armv8 Crypto Extension support alongside AES-NI. - Clarified that hardware acceleration status is informational and reflects available AES CPU support. <!-- end of auto-generated comment: release notes by coderabbit.ai -->
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…ccelerated example (LAB-523) The example is the README's only dispose() call, so it is the shape readers copy. try/finally keeps dispose() on the rejection path; no catch, so the error still surfaces.
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Overview
Exposes cachekit-core's AES hardware-detection probe through both Rust bindings and the TypeScript encryption manager. The probe already ran on every binding load but had no accessor, leaving the result unreachable from the SDK.
Public API changes
TenantKeys.hardwareAccelerationEnabled(): boolean— added to both bindings:packages/cachekit-core-ts): forwardsZeroKnowledgeEncryptor::hardware_acceleration_enabled();index.d.tsregenerated.packages/cachekit-core-wasm): same forward via#[wasm_bindgen(js_name = …)], returningfalseon wasm32 since the target has no AES instructions. Hand-maintainedindex.d.tsupdated to keep the two handle shapes aligned.EncryptionManagerCore.isHardwareAccelerated(): Promise<boolean | null>— awaitsensureInitialized()so it resolves before the first encrypt, and returnsnullwhen the accessor is absent.EncryptionTenantKeys.hardwareAccelerationEnabled?()— declared optional on the binding interface, mirroring the existingkeyringEntryCounttreatment. This is what makes version skew representable: an installed binary predating the accessor yieldsnull(unknown) instead of a misleadingfalse.Disposal-race handling
isHardwareAccelerated()performs an explicitdisposed/tenantKeyscheck after the await rather than relying on a non-null assertion. BecauseensureInitialized()short-circuits on an already-initialised manager,dispose()can land while the call is suspended; unlikeencrypt()/decrypt(), this path has no catch block to convert the resulting null read. The check ensures anEncryptionErrorsurfaces rather than aTypeError.Documentation
README gains an Observability paragraph framing the flag as diagnostic only — the crypto backend dispatches independently, so it explains
.securelatency rather than controlling it. Per-architecture semantics are documented as core's behaviour, including the aarch64 caveat (as of cachekit-core 0.6 the flag is unconditionallytruethere because core probes NEON, not the Crypto Extension).Test coverage
nullfor a handle lacking the accessor;EncryptionErroron the dispose race.false, asserted as strictlyfalserather than falsy to catch anundefinedregression.Scope
No changes to crypto dispatch, AAD construction, key derivation, or the wire format.
Summary
Updates the encryption documentation example in
packages/cachekit/README.mddemonstratingEncryptionManager.isHardwareAccelerated().Changes
isHardwareAccelerated()call in atry/finallyblock, withmanager.dispose()moved into thefinallyclause.Impact
Documentation-only change. The revised example ensures readers follow a resource-safe pattern in which the
EncryptionManageris disposed even if the hardware-acceleration probe throws. No public API surface or runtime behavior is modified by this diff.Summary by CodeRabbit
nullif the installed binding does not support this check.