Add microbenchmarks for message decryption.

This commit is contained in:
Greyson Parrelli 2023-04-06 10:04:37 -04:00
parent 0156e74f5a
commit 6d4906dfa8
16 changed files with 611 additions and 13 deletions

View file

@ -55,7 +55,7 @@ android {
testOptions {
managedDevices {
devices {
create ("api31", ManagedVirtualDevice::class) {
create("api31", ManagedVirtualDevice::class) {
device = "Pixel 6"
apiLevel = 31
systemImageSource = "aosp"

View file

@ -0,0 +1,8 @@
plugins {
id("org.jlleitschuh.gradle.ktlint")
}
ktlint {
// Use a newer version to resolve https://github.com/JLLeitschuh/ktlint-gradle/issues/507
version.set("0.47.1")
}

View file

@ -17,8 +17,8 @@ val signalJavaVersion: JavaVersion by extra
plugins {
id("com.android.library")
id("kotlin-android")
id("org.jlleitschuh.gradle.ktlint")
id("android-constants")
id("ktlint")
}
android {
@ -46,11 +46,6 @@ android {
}
}
ktlint {
// Use a newer version to resolve https://github.com/JLLeitschuh/ktlint-gradle/issues/507
version.set("0.47.1")
}
dependencies {
lintChecks(project(":lintchecks"))

View file

@ -19,7 +19,7 @@ val signalJavaVersion: JavaVersion by extra
plugins {
id("com.android.application")
id("kotlin-android")
id("org.jlleitschuh.gradle.ktlint")
id("ktlint")
id("android-constants")
}
@ -47,11 +47,6 @@ android {
}
}
ktlint {
// Use a newer version to resolve https://github.com/JLLeitschuh/ktlint-gradle/issues/507
version.set("0.47.1")
}
dependencies {
coreLibraryDesugaring(libs.android.tools.desugar)

View file

@ -31,6 +31,7 @@ buildscript {
exclude group: 'com.squareup.wire', module: 'wire-grpc-server-generator'
exclude group: 'io.outfoxx', module: 'swiftpoet'
}
classpath 'androidx.benchmark:benchmark-gradle-plugin:1.1.0-beta04'
}
}

View file

@ -159,6 +159,7 @@ dependencyResolutionManagement {
alias('espresso-core').to('androidx.test.espresso:espresso-core:3.4.0')
alias('uiautomator').to('androidx.test.uiautomator:uiautomator:2.2.0')
alias('androidx-benchmark-macro').to('androidx.benchmark:benchmark-macro-junit4:1.1.1')
alias('androidx-benchmark-micro').to('androidx.benchmark:benchmark-junit4:1.1.0-beta04')
}
testLibs {

View file

@ -102,6 +102,11 @@ https://docs.gradle.org/current/userguide/dependency_verification.html
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@ -180,6 +185,14 @@ https://docs.gradle.org/current/userguide/dependency_verification.html
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<component group="androidx.benchmark" name="benchmark-common" version="1.1.0-beta05">
<artifact name="benchmark-common-1.1.0-beta05.aar">
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@ -204,6 +217,22 @@ https://docs.gradle.org/current/userguide/dependency_verification.html
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<component group="androidx.benchmark" name="benchmark-gradle-plugin" version="1.1.0-beta04">
<artifact name="benchmark-gradle-plugin-1.1.0-beta04.jar">
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</component>
<component group="androidx.benchmark" name="benchmark-junit4" version="1.1.0-beta04">
<artifact name="benchmark-junit4-1.1.0-beta04.aar">
<sha256 value="6977d2a084b46a16d4e3f1b7e76ef085337cf960a1ff44939b845c22e93bf94a" origin="Generated by Gradle"/>
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<artifact name="benchmark-junit4-1.1.0-beta04.module">
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</component>
<component group="androidx.benchmark" name="benchmark-macro" version="1.1.0-beta05">
<artifact name="benchmark-macro-1.1.0-beta05.aar">
<sha256 value="979733a465d24a85536d4a51d0a9bfc20d8cd6537e032f88a5fb669f25d880e7" origin="Generated by Gradle"/>
@ -1184,6 +1213,11 @@ https://docs.gradle.org/current/userguide/dependency_verification.html
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<component group="androidx.test" name="rules" version="1.4.0">
<artifact name="rules-1.4.0.aar">
<sha256 value="01401cd7d1185530f6081ce503ce611d18d8a483ea15599a16c39f15b2f8e7d8" origin="Generated by Gradle"/>
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</component>
<component group="androidx.test" name="runner" version="1.4.0">
<artifact name="runner-1.4.0.aar">
<sha256 value="e3f3d8b8d5d4a3edcacbdaa4a31bda2b0e41d3e704b02b3750466a06367ec5a0" origin="Generated by Gradle"/>
@ -1267,6 +1301,9 @@ https://docs.gradle.org/current/userguide/dependency_verification.html
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</component>
<component group="androidx.tracing" name="tracing-ktx" version="1.0.0">
<artifact name="tracing-ktx-1.0.0.aar">
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@ -3404,6 +3441,14 @@ https://docs.gradle.org/current/userguide/dependency_verification.html
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</component>
<component group="com.squareup.okio" name="okio-metadata" version="2.8.0">
<artifact name="okio-metadata-2.8.0.jar">
<sha256 value="f7dc3883ceae2e1fe3425e1b54c5df28b8857c5fd00381b521fda60790f2952c" origin="Generated by Gradle"/>
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<artifact name="okio-metadata-2.8.0.module">
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</component>
<component group="com.squareup.okio" name="okio-multiplatform" version="2.8.0">
<artifact name="okio-multiplatform-2.8.0.module">
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@ -3481,6 +3526,14 @@ https://docs.gradle.org/current/userguide/dependency_verification.html
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@ -4506,6 +4559,11 @@ https://docs.gradle.org/current/userguide/dependency_verification.html
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1
microbenchmark/.gitignore vendored Normal file
View file

@ -0,0 +1 @@
/build

View file

@ -0,0 +1,37 @@
# Add project specific ProGuard rules here.
# You can control the set of applied configuration files using the
# proguardFiles setting in build.gradle.
#
# For more details, see
# http://developer.android.com/guide/developing/tools/proguard.html
# If your project uses WebView with JS, uncomment the following
# and specify the fully qualified class name to the JavaScript interface
# class:
#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
# public *;
#}
# Uncomment this to preserve the line number information for
# debugging stack traces.
#-keepattributes SourceFile,LineNumberTable
# If you keep the line number information, uncomment this to
# hide the original source file name.
#-renamesourcefileattribute SourceFile
-dontobfuscate
-ignorewarnings
-keepattributes *Annotation*
-dontnote junit.framework.**
-dontnote junit.runner.**
-dontwarn androidx.test.**
-dontwarn org.junit.**
-dontwarn org.hamcrest.**
-dontwarn com.squareup.javawriter.JavaWriter
-keepclasseswithmembers @org.junit.runner.RunWith public class *

View file

@ -0,0 +1,63 @@
@file:Suppress("UnstableApiUsage")
plugins {
id("com.android.library")
id("androidx.benchmark")
id("org.jetbrains.kotlin.android")
id("android-constants")
id("ktlint")
}
val signalBuildToolsVersion: String by extra
val signalCompileSdkVersion: String by extra
val signalTargetSdkVersion: Int by extra
val signalMinSdkVersion: Int by extra
val signalJavaVersion: JavaVersion by extra
android {
namespace = "org.signal.microbenchmark"
compileSdkVersion = signalCompileSdkVersion
compileOptions {
sourceCompatibility = signalJavaVersion
targetCompatibility = signalJavaVersion
}
kotlinOptions {
jvmTarget = "11"
}
defaultConfig {
minSdk = signalMinSdkVersion
targetSdk = signalTargetSdkVersion
testInstrumentationRunner = "androidx.benchmark.junit4.AndroidBenchmarkRunner"
}
testBuildType = "release"
buildTypes {
debug {
// Since isDebuggable can't be modified by gradle for library modules,
// it must be done in a manifest - see src/androidTest/AndroidManifest.xml
isMinifyEnabled = true
proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "benchmark-proguard-rules.pro")
}
release {
isDefault = true
}
}
}
dependencies {
lintChecks(project(":lintchecks"))
// Base dependencies
androidTestImplementation(testLibs.junit.junit)
androidTestImplementation(benchmarkLibs.androidx.test.ext.junit)
androidTestImplementation(benchmarkLibs.androidx.benchmark.micro)
// Dependencies of modules being tested
androidTestImplementation(project(":libsignal-service"))
androidTestImplementation(libs.libsignal.android)
androidTestImplementation(libs.google.protobuf.javalite)
}

View file

@ -0,0 +1,15 @@
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<!--
Important: disable debugging for accurate performance results
In a com.android.library project, this flag must be disabled from this
manifest, as it is not possible to override this flag from Gradle.
-->
<application
android:debuggable="false"
tools:ignore="HardcodedDebugMode"
tools:replace="android:debuggable" />
</manifest>

View file

@ -0,0 +1,89 @@
package org.signal.microbenchmark
import android.util.Log
import androidx.benchmark.junit4.BenchmarkRule
import androidx.benchmark.junit4.measureRepeated
import androidx.test.ext.junit.runners.AndroidJUnit4
import org.junit.Before
import org.junit.Rule
import org.junit.Test
import org.junit.runner.RunWith
import org.signal.libsignal.protocol.logging.SignalProtocolLogger
import org.signal.libsignal.protocol.logging.SignalProtocolLoggerProvider
import org.signal.util.SignalClient
/**
* Benchmarks for decrypting messages.
*
* Note that in order to isolate all costs to just the process of decryption itself,
* all operations are performed in in-memory stores.
*/
@RunWith(AndroidJUnit4::class)
class ProtocolBenchmarks {
@get:Rule
val benchmarkRule = BenchmarkRule()
@Before
fun setup() {
SignalProtocolLoggerProvider.setProvider { priority, tag, message ->
when (priority) {
SignalProtocolLogger.VERBOSE -> Log.v(tag, message)
SignalProtocolLogger.DEBUG -> Log.d(tag, message)
SignalProtocolLogger.INFO -> Log.i(tag, message)
SignalProtocolLogger.WARN -> Log.w(tag, message)
SignalProtocolLogger.ERROR -> Log.w(tag, message)
SignalProtocolLogger.ASSERT -> Log.e(tag, message)
}
}
}
@Test
fun decrypt_unsealedSender() {
val (alice, bob) = buildAndInitializeClients()
benchmarkRule.measureRepeated {
val envelope = runWithTimingDisabled {
alice.encryptUnsealedSender(bob)
}
bob.decryptMessage(envelope)
// Respond so that the session ratchets
runWithTimingDisabled {
alice.decryptMessage(bob.encryptUnsealedSender(alice))
}
}
}
@Test
fun decrypt_sealedSender() {
val (alice, bob) = buildAndInitializeClients()
benchmarkRule.measureRepeated {
val envelope = runWithTimingDisabled {
alice.encryptSealedSender(bob)
}
bob.decryptMessage(envelope)
// Respond so that the session ratchets
runWithTimingDisabled {
alice.decryptMessage(bob.encryptSealedSender(alice))
}
}
}
private fun buildAndInitializeClients(): Pair<SignalClient, SignalClient> {
val alice = SignalClient()
val bob = SignalClient()
// Do initial prekey dance
alice.initializeSession(bob)
bob.initializeSession(alice)
alice.decryptMessage(bob.encryptUnsealedSender(alice))
bob.decryptMessage(alice.encryptUnsealedSender(bob))
return alice to bob
}
}

View file

@ -0,0 +1,157 @@
package org.signal.util
import org.signal.libsignal.protocol.IdentityKey
import org.signal.libsignal.protocol.IdentityKeyPair
import org.signal.libsignal.protocol.SignalProtocolAddress
import org.signal.libsignal.protocol.groups.state.SenderKeyRecord
import org.signal.libsignal.protocol.message.CiphertextMessage
import org.signal.libsignal.protocol.state.IdentityKeyStore
import org.signal.libsignal.protocol.state.PreKeyRecord
import org.signal.libsignal.protocol.state.SessionRecord
import org.signal.libsignal.protocol.state.SignedPreKeyRecord
import org.whispersystems.signalservice.api.SignalServiceAccountDataStore
import org.whispersystems.signalservice.api.push.DistributionId
import java.util.UUID
/**
* An in-memory datastore specifically designed for tests.
*/
class InMemorySignalServiceAccountDataStore : SignalServiceAccountDataStore {
private val identityKey: IdentityKeyPair = IdentityKeyPair.generate()
private val identities: MutableMap<SignalProtocolAddress, IdentityKey> = mutableMapOf()
private val oneTimePreKeys: MutableMap<Int, PreKeyRecord> = mutableMapOf()
private val signedPreKeys: MutableMap<Int, SignedPreKeyRecord> = mutableMapOf()
private var sessions: MutableMap<SignalProtocolAddress, SessionRecord> = mutableMapOf()
private val senderKeys: MutableMap<SenderKeyLocator, SenderKeyRecord> = mutableMapOf()
override fun getIdentityKeyPair(): IdentityKeyPair {
return identityKey
}
override fun getLocalRegistrationId(): Int {
return 1
}
override fun saveIdentity(address: SignalProtocolAddress, identityKey: IdentityKey): Boolean {
val hadPrevious = identities.containsKey(address)
identities[address] = identityKey
return hadPrevious
}
override fun isTrustedIdentity(address: SignalProtocolAddress?, identityKey: IdentityKey?, direction: IdentityKeyStore.Direction?): Boolean {
return true
}
override fun getIdentity(address: SignalProtocolAddress): IdentityKey? {
return identities[address]
}
override fun loadPreKey(preKeyId: Int): PreKeyRecord {
return oneTimePreKeys[preKeyId]!!
}
override fun storePreKey(preKeyId: Int, record: PreKeyRecord) {
oneTimePreKeys[preKeyId] = record
}
override fun containsPreKey(preKeyId: Int): Boolean {
return oneTimePreKeys.containsKey(preKeyId)
}
override fun removePreKey(preKeyId: Int) {
oneTimePreKeys.remove(preKeyId)
}
override fun loadSession(address: SignalProtocolAddress): SessionRecord {
return sessions.getOrPut(address) { SessionRecord() }
}
override fun loadExistingSessions(addresses: List<SignalProtocolAddress>): List<SessionRecord> {
return addresses.map { sessions[it]!! }
}
override fun getSubDeviceSessions(name: String): List<Int> {
return sessions
.filter { it.key.name == name && it.key.deviceId != 1 && it.value.isValid() }
.map { it.key.deviceId }
}
override fun storeSession(address: SignalProtocolAddress, record: SessionRecord) {
sessions[address] = record
}
override fun containsSession(address: SignalProtocolAddress): Boolean {
return sessions[address]?.isValid() ?: false
}
override fun deleteSession(address: SignalProtocolAddress) {
sessions -= address
}
override fun deleteAllSessions(name: String) {
sessions = sessions.filter { it.key.name == name }.toMutableMap()
}
override fun loadSignedPreKey(signedPreKeyId: Int): SignedPreKeyRecord {
return signedPreKeys[signedPreKeyId]!!
}
override fun loadSignedPreKeys(): List<SignedPreKeyRecord> {
return signedPreKeys.values.toList()
}
override fun storeSignedPreKey(signedPreKeyId: Int, record: SignedPreKeyRecord) {
signedPreKeys[signedPreKeyId] = record
}
override fun containsSignedPreKey(signedPreKeyId: Int): Boolean {
return signedPreKeys.containsKey(signedPreKeyId)
}
override fun removeSignedPreKey(signedPreKeyId: Int) {
signedPreKeys -= signedPreKeyId
}
override fun storeSenderKey(sender: SignalProtocolAddress, distributionId: UUID, record: SenderKeyRecord) {
senderKeys[SenderKeyLocator(sender, distributionId)] = record
}
override fun loadSenderKey(sender: SignalProtocolAddress, distributionId: UUID): SenderKeyRecord {
return senderKeys[SenderKeyLocator(sender, distributionId)]!!
}
override fun archiveSession(address: SignalProtocolAddress) {
sessions[address]!!.archiveCurrentState()
}
override fun getAllAddressesWithActiveSessions(addressNames: MutableList<String>): Set<SignalProtocolAddress> {
return sessions
.filter { it.key.name in addressNames }
.filter { it.value.isValid() }
.map { it.key }
.toSet()
}
override fun getSenderKeySharedWith(distributionId: DistributionId): Set<SignalProtocolAddress> {
error("Not used")
}
override fun markSenderKeySharedWith(distributionId: DistributionId, addresses: Collection<SignalProtocolAddress>) {
// Not used
}
override fun clearSenderKeySharedWith(addresses: Collection<SignalProtocolAddress>) {
// Not used
}
override fun isMultiDevice(): Boolean {
return false
}
private fun SessionRecord.isValid(): Boolean {
return this.hasSenderChain() && this.sessionVersion == CiphertextMessage.CURRENT_VERSION
}
private data class SenderKeyLocator(val address: SignalProtocolAddress, val distributionId: UUID)
}

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@ -0,0 +1,175 @@
package org.signal.util
import com.google.protobuf.ByteString
import org.signal.libsignal.internal.Native
import org.signal.libsignal.internal.NativeHandleGuard
import org.signal.libsignal.metadata.certificate.CertificateValidator
import org.signal.libsignal.metadata.certificate.SenderCertificate
import org.signal.libsignal.metadata.certificate.ServerCertificate
import org.signal.libsignal.protocol.SessionBuilder
import org.signal.libsignal.protocol.SignalProtocolAddress
import org.signal.libsignal.protocol.ecc.Curve
import org.signal.libsignal.protocol.ecc.ECKeyPair
import org.signal.libsignal.protocol.ecc.ECPublicKey
import org.signal.libsignal.protocol.state.PreKeyBundle
import org.signal.libsignal.protocol.state.PreKeyRecord
import org.signal.libsignal.protocol.state.SignedPreKeyRecord
import org.whispersystems.signalservice.api.SignalServiceAccountDataStore
import org.whispersystems.signalservice.api.SignalSessionLock
import org.whispersystems.signalservice.api.crypto.ContentHint
import org.whispersystems.signalservice.api.crypto.EnvelopeContent
import org.whispersystems.signalservice.api.crypto.SignalServiceCipher
import org.whispersystems.signalservice.api.crypto.UnidentifiedAccess
import org.whispersystems.signalservice.api.push.ServiceId
import org.whispersystems.signalservice.api.push.SignalServiceAddress
import org.whispersystems.signalservice.internal.push.OutgoingPushMessage
import org.whispersystems.signalservice.internal.push.SignalServiceProtos
import org.whispersystems.signalservice.internal.util.Util
import org.whispersystems.util.Base64
import java.util.Optional
import java.util.UUID
import java.util.concurrent.locks.ReentrantLock
import kotlin.random.Random
/**
* An in-memory signal client that can encrypt and decrypt messages.
*
* Has a single prekey bundle that can be used to initialize a session with another client.
*/
class SignalClient {
companion object {
private val trustRoot: ECKeyPair = Curve.generateKeyPair()
}
private val serviceId: ServiceId = ServiceId.from(UUID.randomUUID())
private val store: SignalServiceAccountDataStore = InMemorySignalServiceAccountDataStore()
private val preKeyBundle: PreKeyBundle = let {
val preKeyRecord = PreKeyRecord(1, Curve.generateKeyPair())
val signedPreKeyPair = Curve.generateKeyPair()
val signedPreKeySignature = Curve.calculateSignature(store.identityKeyPair.privateKey, signedPreKeyPair.publicKey.serialize())
store.storePreKey(1, preKeyRecord)
store.storeSignedPreKey(1, SignedPreKeyRecord(1, System.currentTimeMillis(), signedPreKeyPair, signedPreKeySignature))
PreKeyBundle(1, 1, 1, preKeyRecord.keyPair.publicKey, 1, signedPreKeyPair.publicKey, signedPreKeySignature, store.identityKeyPair.publicKey)
}
private val unidentifiedAccessKey: ByteArray = Util.getSecretBytes(32)
private val senderCertificate: SenderCertificate = createCertificateFor(
trustRoot = trustRoot,
uuid = serviceId.uuid(),
e164 = "+${Random.nextLong(1111111111L, 9999999999L)}",
deviceId = 1,
identityKey = store.identityKeyPair.publicKey.publicKey,
expires = Long.MAX_VALUE
)
private val cipher = SignalServiceCipher(SignalServiceAddress(serviceId), 1, store, TestSessionLock(), CertificateValidator(trustRoot.publicKey))
/**
* Sets up sessions using the [to] client's [preKeyBundle]. Note that you can only initialize a client once
* since we currently only make a single prekey bundle.
*/
fun initializeSession(to: SignalClient) {
val address = SignalProtocolAddress(to.serviceId.toString(), 1)
SessionBuilder(store, address).process(to.preKeyBundle)
}
fun encryptUnsealedSender(to: SignalClient): SignalServiceProtos.Envelope {
val sentTimestamp = System.currentTimeMillis()
val message = SignalServiceProtos.DataMessage.newBuilder()
.setBody("Test Message")
.setTimestamp(sentTimestamp)
.build()
val content = SignalServiceProtos.Content.newBuilder()
.setDataMessage(message)
.build()
val outgoingPushMessage: OutgoingPushMessage = cipher.encrypt(
SignalProtocolAddress(to.serviceId.toString(), 1),
Optional.empty(),
EnvelopeContent.encrypted(content, ContentHint.RESENDABLE, Optional.empty())
)
val encryptedContent: ByteArray = Base64.decode(outgoingPushMessage.content)
return SignalServiceProtos.Envelope.newBuilder()
.setSourceUuid(serviceId.toString())
.setSourceDevice(1)
.setDestinationUuid(to.serviceId.toString())
.setTimestamp(sentTimestamp)
.setServerTimestamp(sentTimestamp)
.setServerGuid(UUID.randomUUID().toString())
.setType(SignalServiceProtos.Envelope.Type.valueOf(outgoingPushMessage.type))
.setUrgent(true)
.setContent(ByteString.copyFrom(encryptedContent))
.build()
}
fun encryptSealedSender(to: SignalClient): SignalServiceProtos.Envelope {
val sentTimestamp = System.currentTimeMillis()
val message = SignalServiceProtos.DataMessage.newBuilder()
.setBody("Test Message")
.setTimestamp(sentTimestamp)
.build()
val content = SignalServiceProtos.Content.newBuilder()
.setDataMessage(message)
.build()
val outgoingPushMessage: OutgoingPushMessage = cipher.encrypt(
SignalProtocolAddress(to.serviceId.toString(), 1),
Optional.of(UnidentifiedAccess(to.unidentifiedAccessKey, senderCertificate.serialized)),
EnvelopeContent.encrypted(content, ContentHint.RESENDABLE, Optional.empty())
)
val encryptedContent: ByteArray = Base64.decode(outgoingPushMessage.content)
return SignalServiceProtos.Envelope.newBuilder()
.setSourceUuid(serviceId.toString())
.setSourceDevice(1)
.setDestinationUuid(to.serviceId.toString())
.setTimestamp(sentTimestamp)
.setServerTimestamp(sentTimestamp)
.setServerGuid(UUID.randomUUID().toString())
.setType(SignalServiceProtos.Envelope.Type.valueOf(outgoingPushMessage.type))
.setUrgent(true)
.setContent(ByteString.copyFrom(encryptedContent))
.build()
}
fun decryptMessage(envelope: SignalServiceProtos.Envelope) {
cipher.decrypt(envelope, System.currentTimeMillis())
}
}
private fun createCertificateFor(trustRoot: ECKeyPair, uuid: UUID, e164: String, deviceId: Int, identityKey: ECPublicKey, expires: Long): SenderCertificate {
val serverKey: ECKeyPair = Curve.generateKeyPair()
NativeHandleGuard(serverKey.publicKey).use { serverPublicGuard ->
NativeHandleGuard(trustRoot.privateKey).use { trustRootPrivateGuard ->
val serverCertificate = ServerCertificate(Native.ServerCertificate_New(1, serverPublicGuard.nativeHandle(), trustRootPrivateGuard.nativeHandle()))
NativeHandleGuard(identityKey).use { identityGuard ->
NativeHandleGuard(serverCertificate).use { serverCertificateGuard ->
NativeHandleGuard(serverKey.privateKey).use { serverPrivateGuard ->
return SenderCertificate(Native.SenderCertificate_New(uuid.toString(), e164, deviceId, identityGuard.nativeHandle(), expires, serverCertificateGuard.nativeHandle(), serverPrivateGuard.nativeHandle()))
}
}
}
}
}
}
private class TestSessionLock : SignalSessionLock {
val lock = ReentrantLock()
override fun acquire(): SignalSessionLock.Lock {
lock.lock()
return SignalSessionLock.Lock { lock.unlock() }
}
}

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@ -0,0 +1,2 @@
<?xml version="1.0" encoding="utf-8"?>
<manifest />

View file

@ -88,3 +88,4 @@ project(':qr-app').projectDir = file('qr/app')
rootProject.name='Signal'
apply from: 'dependencies.gradle'
include ':microbenchmark'