The debug-only .bin dumps wrote loose into /data/local/tmp, cluttering a
directory shared with every other tool. Route both writers through a
shared DIAGNOSTIC_DIR (/data/local/tmp/teesim) with mkdir-on-write, and
extend the release purge to sweep the new folder plus any loose leftovers
from older debug installs.
An EC-only Google keybox could not re-root an RSA-keyed attestation: the keybox lookup asked for an RSA signing key, got null, and threw. patchCertificateChain caught the throw and returned the original chain untouched, leaking the device's real unlocked Root of Trust for RSA keys while EC keys patched correctly.
Fall back to any available keybox key (preferring EC) and sign the patched leaf with the keybox key's own algorithm rather than the original leaf's. A leaf's signature algorithm is independent of its subject key, so the RSA leaf re-signs validly under the EC keybox and the chain still roots to the Google keybox with the forged, locked RoT.
Add KeyBoxManager.getAnyAttestationKey; drop the now-dead sigAlgName param and normalizeSignatureAlgorithm helper.
Add a debug-only per-UID diagnostic plane gated on BuildConfig.DEBUG.
For apps in target.txt it records every keystore interaction and the
forged attestation it produces to teesim-uid-<uid>.log: decoded cert
chain (FORGE and PATCH paths), key params, keybox, and prop sources,
with the calling UID threaded through the C++ binder hook and Rust
certgen. Release builds stay silent (R8 strips the write plane and the
runtime gate short-circuits). Adds --clear-logs to package.sh.
The serial log added previously lived in parseKeysFromXml, which
getAttestationKey runs only on a cache miss -- so it emitted at most
once per boot and scrolled off the buffer before it could be read.
Move it into getAttestationKey so the keybox attestation cert serials
are logged on every fetch, on the live native cert-gen path.
Verified on device: "Using RSA keybox keybox.xml; attestation cert
serials (hex): ..." now prints on each forge.
Mirror Duck Detector's OperationErrorPathProbe: real Samsung and
Xiaomi-MTK TEEs return success for updateAad on a non-AEAD operation,
while other vendors reject it with INVALID_TAG. The shim reads the same
Build identity the probe reads and answers accordingly, in both the
CryptoPrimitive default (sign/verify) and CipherPrimitive paths.
Forward hardening for the #28 detector: the prior unconditional
ServiceSpecificException throw already passes the probe on every vendor,
so this guards against stricter future probes rather than fixing a
current failure.
Emit each loaded keybox's certificate-chain serials (lowercase hex) at
parse time. A revoked or leaked keybox is then visible from logcat
alone, since Google's CRL and Duck Detector's "mass abuse" check both
match by certificate serial.
Diagnostic aid for the revoked-keybox danger in #28; the actual fix is
rotating to a non-revoked keybox.
Run the project ktfmt kotlinLangStyle formatter over app/ to bring the
tree into canonical form. Formatting only -- no logic change.
Verified semantic-neutral: ktfmt(working tree) is byte-identical to
ktfmt(committed HEAD) across all of app/src, so the prior uncommitted
WIP carried zero behavioral change.
Add a debug-only structured log line per generateKey, emitted at every
outcome (SKIP, the four REJECTs, FORWARD_HAL, FORGE, PATCH, PASSTHROUGH).
Each line carries the resolving package (via the cached
ConfigurationManager.getPackagesForUid), alias, algorithm, StrongBox
flag, the attestation tag set, and the verdict, so triaging "app X
broke" becomes a single logcat grep instead of decoding parcel dumps.
Gated on SystemLogger.isDebugBuild: release builds return before any
string is built, keeping the path silent and artifact-free. Logs to
logcat only, never to files.
The canAttestDeviceIds gate (3575c74) probed the live TEE to decide
whether to honor device-property/ID attestation. That probe is gated on
isTeeFunctional, which is false on every dead-TEE device the module
serves, so GENERATE mode rejected all such requests with
CANNOT_ATTEST_IDS, including GMS Play Integrity's hardware path, which
broke BHIM and any UPI/Play-Integrity-gated app.
Remove the gate. Device-property attestation (BRAND/MODEL/...) now forges
unconditionally, as genuine devices universally attest it. Device-ID
attestation stays governed by the pre-existing caller-permission check,
the real KeyMint rule: privileged callers get it, ordinary apps do not.
Drop the now-unused DeviceAttestationService.canAttestDeviceIds probe.
Grant-plane coherence (Android 16 incl.), Google Wallet + fingerprint
compatibility (PR #26/#27), and removal of the in-module PIF/bulletin
resolvers. Frozen at gitCommitCount 251.
The piped getevent stream block-buffered on Magisk's BusyBox ash and
missed a single vol-key press before the timeout. Sample getevent in 1s
timeout bursts in a deadline loop instead.
Remove PatchLevelManager (auto-resolved the security-patch date from an
installed PlayIntegrityFix module into security_patch.txt, with a
FileObserver hot-reload) and BulletinPoller (scheduled bulletin refresh),
and their App.kt init/start calls.
Add purgeDebugDiagnostics(): release builds sweep stale teesim-*.bin
dumps from /data/local/tmp at boot so a prior debug install can't leave a
detection artifact. Stabilize the InterceptorUtils diagnostic dump path
to a single file instead of one per call.
Domain.GRANT readback only recognized synthetic keys (generatedKeys), so
patch-mode keys (real TEE key whose attestation we patch on read, cached
in teeResponses) fell through to the real keystore2 unpatched. Android 16
made KeyStoreManager.grantKeyAccess a public API, so the owner read
returned our patched chain while the grant read returned the raw real
chain -> duck SELF_/ISOLATED_CHAIN_SPLIT.
Gate grant()/ungrant()/resolveGrant on ownsKeyResponse() (synthetic OR
patch-mode) so every access plane serves the same cached KeyEntryResponse.
Pre-36 still answers PERMISSION_DENIED; no behavior change on Android 15.
generateKey synthesized device-property attestation unconditionally:
the BRAND/DEVICE/PRODUCT/MANUFACTURER/MODEL tags that
setDevicePropertiesAttestationIncluded emits. A forged key thus
succeeded where real silicon returns CANNOT_ATTEST_IDS. Hardware that
never provisioned device IDs cannot attest them, so forging them is an
over-capability tell: a genuine device of the same class fails the
identical request.
Add DeviceAttestationService.canAttestDeviceIds, a lazy probe that asks
the real TEE to attest device properties once and caches the verdict.
It is gated behind isTeeFunctional, so a silent or dead TEE
short-circuits to "cannot attest" without a second doomed probe.
handleGenerateKey now returns KEYMINT_CANNOT_ATTEST_IDS for any
device-ID or device-property attestation the real TEE cannot satisfy,
uniformly across AUTO, PATCH, and GENERATE. Basic attestation carries
none of these tags and is untouched.
Verified on 23106RN0DA: kknd under GENERATE now WARNs, matching a stock
locked-bootloader device. Principle: forge health, mirror capability.
Hook the keystore2 daemon's android.security.maintenance binder (hosted
by the same process, reached by the already-injected native hook) so
synthetic key state follows real key-lifecycle events:
- clearNamespace(APP) purges synthetic keys for the uid and their grants.
- deleteAllKeys() clears all synthetic keys and grants.
- migrateKeyNamespace() re-keys the synthetic entry, preserving material,
chain, and grants.
Pure side-effect hook: every handled transaction mutates only our own
synthetic state, then returns ContinueAndSkipPost so the real keystore2
still performs the real operation. Unhandled codes pass through, so real
key lifecycle is never disturbed. Pre-empts delete-then-read and
clearNamespace coherence probes (Phase 9 Change 4).
Adds a minimal IKeystoreMaintenance compile stub for the descriptor;
transaction codes resolve reflectively on-device.
Refs Phase 9 .omc/plans/tee-fingerprint-phase-9-grant-plane-coherence.md
Two synthetic-cache staleness gaps let getKeyEntry replay a pre-mutation
attestation:
- importKey now drops teeResponses and patchedChains for the alias, not
only generatedKeys. A successful import replaces the real key, so the
retained patched chain was a tell (duck STALE_GENERATED_AFTER_IMPORT).
- After updateSubcomponent re-keys a patched chain, getKeyEntry on a
patch-mode key evicts the cached TEE response by KEY_ID or APP so the
read falls through to the updated real keystore2
(duck STALE_TEE_RESPONSE_AFTER_KEY_ID_UPDATE).
Refs Phase 9 .omc/plans/tee-fingerprint-phase-9-grant-plane-coherence.md
KeyStoreManager.grantKeyAccess() became a public app API only in
Android 16 (API 36). Before that grant was a hidden API and SELinux
denied untrusted_app, so a real Android 15 device answers a private-
binder grant() with PERMISSION_DENIED.
The virtualized grant plane (5579b16) issued a synthetic grant on every
SDK, exposing a capability a real Android 15 app does not have. Gate
grant() and ungrant() on SDK_INT >= 36: pre-36 returns PERMISSION_DENIED
for synthetic keys (matching the real device, which Duck then marks
UNAVAILABLE rather than a tell); 36+ keeps the coherent virtualized
grant.
On-device 23106RN0DA (SDK 35): all four grant rows report UNAVAILABLE,
not RED; tamper score unaffected.
Refs Phase 9 .omc/plans/tee-fingerprint-phase-9-grant-plane-coherence.md
Real keystore2 (captured on-device, MediaTek SDK 35) emits 11 EC
authorizations in the generateKey KeyMetadata: no VENDOR_PATCHLEVEL or
BOOT_PATCHLEVEL, and USER_ID tagged at SecurityLevel.SOFTWARE. The shim
emitted 13 with both patchlevels and USER_ID at KEYSTORE.
Duck-Detector's generate-mode parcel fingerprint stride-walks the reply
and keys on the 13-entry layout, so the two extra entries were the tell.
Drop both patchlevels from the authorization list (they remain in the
attestation extension via AttestationBuilder, so attestation content is
unchanged) and move USER_ID to SOFTWARE to mirror the captured device.
On-device 23106RN0DA: generate-mode fingerprint signal gone (0 local),
TEE tamper score 18 -> 8.
Refs Phase 7 .omc/plans/tee-fingerprint-phase-7-generate-mode-coherence.md
Duck-Detector's grant-domain probes generate an attested key, then
reach it through a second access plane -- IKeystoreService.grant() then
getKeyEntry(Domain.GRANT, grantId) -- and compare the certificate
chains. We synthesized the owner key but never virtualized the GRANT
plane, so grant reads fell through to the real keystore2, which has no
record of the synthetic key. That single fall-through produced six RED
rows.
Virtualize the plane so every access path returns the same synthesized
KeyEntryResponse:
- SoftwareGrant state model in the shim companion: issue/resolve/
revoke/purge, caller-bound and access-vector-aware (Change 1).
- grant/ungrant/getKeyEntry(GRANT) handlers in Keystore2Interceptor.
resolveGrant() enforces caller-binding (non-grantee -> KEY_NOT_FOUND,
PR #57 probe 4) and the GET_INFO=0x4 access-vector gate (missing ->
PERMISSION_DENIED, PR #57 probe 3); a valid read returns the owner's
exact KeyEntryResponse for a coherent chain (Change 2).
- Purge grants on key teardown and clearAll, so grants die with the
key and re-key orphans them -- matching real keystore2 (Change 3).
The Domain.GRANT read is resolved before the package-scoped
shouldSkipUid filter: isolated grantees (bindIsolatedService) have no
package mapping and would otherwise be dropped to the real keystore2,
leaving three grant rows Unavailable. Caller-binding in resolveGrant()
is the real access gate, mirroring keystore2's grantee+id row keying.
Verified on-device (generate mode, build #237): all four grant rows
clean, TEE tamper score 28 -> 18, zero adjacent regression.
Refs Phase 9 .omc/plans/tee-fingerprint-phase-9-grant-plane-coherence.md
The INCLUDE_UNIQUE_ID gate in handleGenerateKey (introduced as part of the
PR157 AOSP-compliance work) returns PERMISSION_DENIED when the caller
holds neither SELinux gen_unique_id nor REQUEST_UNIQUE_ID_ATTESTATION.
This breaks Google Wallet card binding on real devices: Wallet's
generateKey carries INCLUDE_UNIQUE_ID without holding the permission, so
its attestation key request is rejected and Wallet surfaces the failure
as "this phone does not meet the security requirements for Google
Wallet". Symptoms reported by users: clearing GMS data only helps for a
few seconds before the state regresses; no card can be added.
Naive removal of the gate is not safe: AttestationBuilder honours
`includeUniqueId == true` by computing an HMAC-SHA256 unique_id and
embedding it in the attestation extension. With the gate gone, GMS
attestation flows that include the tag end up with a unique_id in the
extension that Play Integrity flags as inconsistent for the caller,
turning all three integrity verdicts red.
The fix here splits the difference: when the permission check fails,
silently strip the INCLUDE_UNIQUE_ID tag from the KeyParameter array
(and re-parse `parsedParams`) instead of rejecting the request. The key
generates normally, AttestationBuilder takes the
`else { ByteArray(0) }` branch, and the resulting attestation simply
omits the unique_id field, matching pre-PR157 behaviour, where the
tag effectively had no effect.
Verified on a device that previously failed Wallet binding on the
PR157 baseline:
- Play Integrity: BASIC + DEVICE + STRONG all pass.
- Google Wallet: card binding completes successfully.
- Calls that DO hold the permission are unaffected (still emit
unique_id as before).
The rest of the PR157 compliance work (CALLER_NONCE handling,
AuthorizeCreate ordering, USAGE_COUNT_LIMIT counters, effectiveParams
merging) is preserved.
When handleCreateOperation receives a Domain.KEY_ID request for a key
not in our generatedKeys cache, it correctly forwards to the real HAL.
However, it previously returned TransactionResult.Continue, which lets
the post-handler run. The post-handler unconditionally registers an
OperationInterceptor on the IKeystoreOperation binder returned by real
keystore2. This interceptor then interferes with the caller's
operation (intercepting finish/abort/updateAad calls).
On devices where vendor daemons (e.g. fingerprint calibration) use
Domain.KEY_ID for their hardware-backed keys, this causes operation
failures, the OperationInterceptor races with the immediate
finish/abort call and may reject updateAad with INVALID_TAG if the
operation is not GCM mode.
Fix: return ContinueAndSkipPost (matching the existing Domain.APP NOT
FOUND path) so the post-handler never runs for operations on keys we
don't own. When the key IS in generatedKeys, we never reach this
return, we proceed to create a SoftwareOperation directly in
pre-transact.
Symptom: OnePlus engineering mode ultrasonic fingerprint calibration
hash retrieval fails with module enabled, works with module disabled.
Signed-off-by: Andrea-lyz <Andrea-lyz@users.noreply.github.com>
Duck-Detector's generate-mode parser walks the reply parcel at
12-byte strides and matches (secLevel=256, tag=1, unionTag=32) at
slot[count-1]. Those bytes are actually KEY_SIZE.value=256 followed
by the next Authorization's presence flag and size header, an
emergent fingerprint from misaligned parsing, not a fake value.
Reorder toAuthorizations so PURPOSE/ALGORITHM/KEY_SIZE come first,
mirroring AOSP keymint reference HAL output. KEY_SIZE moves from
auth#4 to auth#2, so its int payload no longer lands at byte 224.
Verified across 31 fresh duckdetector probes: zero matches (was
15/36 before).
Also add gen-mode wire-byte diagnostic to InterceptorUtils and the
generate-mode entry point, debug-gated, dumping request and reply
parcels to /data/local/tmp for offline decode.
Spawn a backgrounded subshell from service.sh that polls
sys.boot_completed once per second and, once set, blanks the
persist.logd.size variants (root, crash, system, main).
Runs alongside the existing supervisor fork so daemon startup is
unaffected. Idempotent across reboots: even if a previous boot
already cleared the props, setting them to empty again is a no-op.
Mirror of the change applied to GENERATE_KEY in 76e0337. Drop the
outer shouldSkipUid gate so handleCreateOperation always runs.
handleCreateOperation already gates on the cache lookup
(KeyMintSecurityLevelInterceptor.kt:298-326): domain=APP looks up
KeyIdentifier(callingUid, alias) in generatedKeys and forwards to
HAL on miss; domain=KEY_ID looks up by nspace filtered by uid and
forwards on miss. The outer UID gate was redundant when the lookup
hits, and harmful when a key was generated under a non-target-list
UID (e.g. Shizuku-routed callers at shell 2000 / root 0 after
76e0337).
Without this change, a BYO key created under Shizuku-routed UID
that the app later attempts to use (signing operation under the
same Shizuku-routed UID) would be forwarded to real HAL, which has
no record of our software key, producing a silent operation
failure instead of the simulator handling the sign internally.
Surfaced by adversarial audit. CREATE_OPERATION no longer needs the
outer gate because handleCreateOperation's own cache-or-forward
logic is the correct gate.
doSoftwareKeyGen's symmetric branch (AES/HMAC/3DES) previously did
two things wrong:
1. It accepted attestationKey != null silently and then ignored the
reference: the symmetric path never consults attestationKey, so a
caller asking for BYO on a symmetric key would have received a key
with no certificate chain and no signal that BYO was dropped.
Reject early with KEYMINT_INVALID_ARGUMENT matching real KeyMint
HAL behavior.
2. The unsupported-algorithm path (e.g. 3DES, which has no JCA
mapping in this branch) threw SECURE_HW_COMMUNICATION_FAILED
(-49), the same numeric code InterceptorUtils labels as
Error::Km(UNSUPPORTED_TAG). That confuses diagnosis since -49 is
exactly the symptom the BYO fix series was just chasing. Use
KEYMINT_INVALID_ARGUMENT (-38) which is what real KeyMint returns
for unsupported algorithms in this context.
Surfaced by adversarial audit of f384871's broadened forceGenerate
gate, which now routes any attestationKey != null to software
unconditionally.
CertificateGenerator.generateCertificateChain selected
keybox.keyPair as fallback signer when getAttestationKeyInfo returned
null, but the chain assembly at line 115 still keyed on
"attestKeyAlias != null" and returned only listOf(leafCert). The
caller received a depth-1 chain signed by the keybox root with no
parent attached, structurally invalid.
Track whether the BYO lookup actually returned a key. On hit return
the depth-1 chain (caller holds the rest). On miss include
keybox.certificates so the chain is rooted.
Surfaced by adversarial audit of f384871, which broadened the
software-dispatch gate to all attestationKey != null requests.
Without this companion fix the miss path produces a malformed chain
where the previous code would have forwarded to HAL.
Shizuku-routed key attestation calls reach keystore2 with callingUid
set to shell (2000) or root (0) instead of the originating app's uid.
target.txt has no entry for those uids so shouldSkipUid returned true
in onPreTransact, and handleGenerateKey was never entered. The
transaction reached the real KeyMint HAL, which on older Keymaster 4.x
HALs rejects Tag::ATTEST_KEY with -49 UNSUPPORTED_TAG.
Move the shouldSkipUid gate from onPreTransact into handleGenerateKey
itself, evaluated after attestationKey and isAttestKeyRequest are
parsed. Skip only when the request is neither BYO nor attest-key-
purpose. CREATE_OPERATION keeps its outer-level gate (not part of the
BYO flow).
After this change, Shizuku-routed BYO requests enter dispatch, hit
forceGenerate=true via the prior simplification, and route to
doSoftwareKeyGen. Non-BYO non-attest calls from shell/root uids
still fall through to HAL unchanged.
D3 (option 2B) from /home/rootdev/.claude/plans/breezy-seeking-wozniak.md.
Any attest-key request or BYO request goes software unconditionally.
Drops the alias-Elvis lookup and the nspace fallback added by the
17c6312 -> eea6001 -> be04f16 revert/restore churn, both of which
silently missed when callers (Shizuku, post-restart sessions) did
not share an in-memory KeyIdentifier(uid, alias) with the attest
key originally registered in attestationKeys.
The (shouldPatch && isAttestKeyRequest) clause is subsumed by the
broader isAttestKeyRequest clause.
D2 from /home/rootdev/.claude/plans/breezy-seeking-wozniak.md.
The race added in b3aa795 forwarded BYO attest-key requests to real
HAL on cache miss, producing -49 UNSUPPORTED_TAG on devices whose
persistent attest key alias survived in keystore2 across daemon
restarts but never re-entered our in-memory attestationKeys set.
AUTO resolution now relies solely on
ConfigurationManager.getPackageModeForUid (config/ConfigurationManager.kt:115),
which uses DeviceAttestationService.isTeeFunctional
(attestation/DeviceAttestationService.kt:67), a Kotlin by-lazy probe
evaluated once per daemon session. Matches upstream JingMatrix and
the v5.0-138 baseline.
Drops the AtomicReference<Boolean?> identity-equality compiler
warnings the race relied on.
Users reported vol+ confirmation not registering on Magisk. The
prior backgrounded `getevent -qlc 1` + `kill -0` poll captured
the first kernel event of any type, then restarted on miss. With
six events per keypress (EV_MSC scan, EV_KEY DOWN, EV_SYN, then
release variants) and a 1s poll cadence, the 10s budget exhausts
before a DOWN sample lands. The chainfire note that piped getevent
breaks BusyBox grep applies under Magisk's ash standalone mode.
Replace with a single streaming `getevent -lq` matched inline
against `KEY_VOLUMEUP DOWN` / `KEY_VOLUMEDOWN DOWN`, wrapped in
`/system/bin/timeout 10`. Full paths bypass BusyBox aliasing.
Add action_i18n.sh with 22 language arms (ar, az, bn, de, el, es-ES,
fa, fr, id, it, ja, ko, pl, pt-BR, ru, th, tl, tr, uk, vi, zh-CN,
zh-TW) plus an English default. Detect device locale via
persist.sys.locale with ro.product.locale and ro.system.locale
fallbacks; split Chinese on Hans/Hant.
action.sh sources the helper at top and substitutes every echoed
literal with $(_msg <key>). The confirm() flow stays unchanged.
Wire action_i18n.sh into customize.sh's per-file extraction list so
the helper lands alongside action.sh in /data/adb/modules/tricky_store
at install time.
Pattern mirrors tricky-addon-enhanced/install_i18n.sh.
Users reported accidentally triggering the module action button from
the root manager UI, which wiped /data/adb/tricky_store/persistent_keys
and forced every attestation-dependent app to re-enroll.
Gate the destructive operation behind an explicit Vol+ confirmation
with a 10-second timeout. Vol- or timeout aborts and preserves keys.
Pattern mirrors tricky-addon-enhanced/install_func.sh choose_automation
(getevent -qlc 1 polled per second), but defaults to cancel on timeout
because the destructive default of the previous script is the
behavior we are correcting.
After PR #22 and the AUTO-mode extension started caching attested
generateKey responses in teeResponses, KEY_ID getKeyEntry lookups for
attested keys returned from memory in ~1ms while non-attested keys
forwarded to real keystore2 took ~1.5ms.
TimingSideChannelProbe measured the 1.55x ratio against its 1.1x
threshold and flagged the asymmetry.
Forward non-attested generateKey to real keystore2 with post-hook
enabled (Continue instead of ContinueAndSkipPost), and extend the
GENERATE_KEY post-hook to cache no-chain responses into teeResponses.
The KEY_ID lookup added in the previous commit now resolves both
paths from memory at matched latency. Cert-chain patching is skipped
for the no-chain branch because there is no attestation extension to
rewrite.
PR #22's KEY_ID lookup at Keystore2Interceptor.onPreTransact only
scanned generatedKeys, which is populated exclusively by
doSoftwareKeyGen (GENERATE mode and the attest-key override path).
For AUTO packages on TEE-good devices the real TEE handles
generateKey and the response lands in teeResponses via the existing
GENERATE_KEY_TRANSACTION post-hook, so getKeyEntry(KEY_ID) by
TimingSideChannelProbe missed and the call leaked SSE.
Add findTeeResponseByKeyId companion helper that mirrors
findGeneratedKeyByKeyId's shape but scans teeResponses keyed by
response.metadata.key.nspace. Wire it as a fallback after the
existing PR #22 lookup. Behavior unchanged for GENERATE packages.
getPackageModeForUid collapses AUTO -> PATCH/GENERATE at the call site
based on DeviceAttestationService.isTeeFunctional, so isAutoMode never
observed Mode.AUTO and always returned false. That made the
isAuto-gated dispatch arms in KeyMintSecurityLevelInterceptor and the
entire raceTeePatch path unreachable.
Iterate packageModes directly with the same priority order as
getPackageModeForUid: first non-null mode wins. AUTO returns true,
PATCH and GENERATE return false. Activates raceTeePatch for AUTO
packages on the first generateKey per security level.
Real keystore2 SSE replies passed through SkipTransaction kept
the daemon's anyhow chain in the parcel string. Run those replies
through the same synthesizer used for module-generated SSEs so
wire shape stays consistent regardless of source.
StrongBox was pinned to attest/keymaster v300 regardless of SDK,
which mismatches devices shipping KeyMint v400 on Android 16.
Fall through to the same SDK_INT->version map used by the TEE
path so StrongBox reports the device-correct tier.
writeString(null) on service-specific exception replies left the
message word as 0xFFFFFFFF, which diverges from AOSP keystore2's
anyhow-formatted "Error::Rc(NAME)" / "Error::Km(NAME)" strings.
Map known ResponseCode/KeyMint codes to their canonical names so
the wire shape matches a stock TEE reply.
Reverts eea6001. The nspace attestation key lookup was part of
the score-4 baseline and closes a real NPE on KEY_ID-domain
references where the alias field is null. Reverted in error
during the score-4-to-14 rollback; restoring to match the
working baseline.
Reverts 180dc03. The updateAad SSE injection landed earlier as
the F1 quirk fix and was part of the score-4 baseline on mt6768.
It was reverted in error during the score-4-to-14 rollback; the
actual regression driver was the uncommitted DELETE_KEY absorber
which has already been dropped. Restoring to match the working
baseline.
Reverts 5d33701. Unconditionally injecting SSE(INVALID_TAG) on
non-AEAD updateAad matched the AOSP TA spec but diverged from
real-device behavior on mt6768, which returns silently. A
behavior-fingerprint detector on the Xiaomi probe flagged the
divergence and the Tamper score climbed from 4 to 14, with a
second detector raising key-tamper. Roll back to investigate a
device-conformant approach.
Enginex0