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feat(operation): add LRU pruning support and latency floor to SoftwareOperation

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Expose finalized state for pruning, add latency floor parameter for
StrongBox timing simulation, and add trace logging for 32KB test
diagnosis.
This commit is contained in:
Enginex0
2026-03-17 19:48:29 +01:00
parent eddd9908af
commit 7cb44b9999
1 changed files with 23 additions and 4 deletions
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app/src/main/java/org/matrix/TEESimulator/interception/keystore/shim/SoftwareOperation.kt
+23 -4
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@@ -145,9 +145,15 @@ private class CipherPrimitive(
override fun abort() {}
}
class SoftwareOperation(private val txId: Long, keyPair: KeyPair, params: KeyMintAttestation) {
class SoftwareOperation(
private val txId: Long,
keyPair: KeyPair,
params: KeyMintAttestation,
private val latencyFloorMs: Long = 0L,
) {
private val primitive: CryptoPrimitive
@Volatile private var finalized = false
@Volatile var finalized = false
private set
init {
val purpose = params.purpose.firstOrNull()
@@ -166,21 +172,28 @@ class SoftwareOperation(private val txId: Long, keyPair: KeyPair, params: KeyMin
}
private fun checkActive() {
if (finalized) throw ServiceSpecificException(KeystoreErrorCodes.invalidOperationHandle)
if (finalized) {
SystemLogger.debug("[SoftwareOp TX_ID: $txId] Rejected: operation already finalized (pruned or completed)")
throw ServiceSpecificException(KeystoreErrorCodes.invalidOperationHandle)
}
}
private fun checkInputLength(data: ByteArray?) {
if (data != null && data.size > MAX_RECEIVE_DATA)
if (data != null && data.size > MAX_RECEIVE_DATA) {
SystemLogger.info("[SoftwareOp TX_ID: $txId] Input too large: ${data.size} > $MAX_RECEIVE_DATA, throwing TOO_MUCH_DATA(${KeystoreErrorCodes.tooMuchData})")
throw ServiceSpecificException(KeystoreErrorCodes.tooMuchData)
}
}
fun updateAad(aadInput: ByteArray?) {
SystemLogger.debug("[SoftwareOp TX_ID: $txId] updateAad() inputSize=${aadInput?.size ?: 0}")
checkActive()
checkInputLength(aadInput)
primitive.updateAad(aadInput)
}
fun update(data: ByteArray?): ByteArray? {
SystemLogger.debug("[SoftwareOp TX_ID: $txId] update() inputSize=${data?.size ?: 0}")
checkActive()
checkInputLength(data)
try {
@@ -197,7 +210,13 @@ class SoftwareOperation(private val txId: Long, keyPair: KeyPair, params: KeyMin
checkActive()
checkInputLength(data)
try {
val startNs = if (latencyFloorMs > 0) System.nanoTime() else 0L
val result = primitive.finish(data, signature)
if (latencyFloorMs > 0) {
val elapsedMs = (System.nanoTime() - startNs) / 1_000_000
val delayMs = latencyFloorMs - elapsedMs
if (delayMs > 0) Thread.sleep(delayMs)
}
finalized = true
SystemLogger.info("[SoftwareOp TX_ID: $txId] Finished operation successfully.")
return result