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session-android
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Merge pull request #67 from loki-project/sealed-sender

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Sealed sender
pull/72/head
gmbnt 5 years ago committed by GitHub
parent 8628f4c63e 9e7ad2eb76
commit 42eb8ef9d1
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
11 changed files with 67 additions and 64 deletions
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26
src/org/thoughtcrime/securesms/crypto/UnidentifiedAccessUtil.java
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@ -6,6 +6,7 @@ import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.annotation.WorkerThread;
import org.signal.libsignal.metadata.SignalProtos;
import org.signal.libsignal.metadata.certificate.CertificateValidator;
import org.signal.libsignal.metadata.certificate.InvalidCertificateException;
import network.loki.messenger.BuildConfig;
@ -20,6 +21,7 @@ import org.whispersystems.libsignal.ecc.ECPublicKey;
import org.whispersystems.libsignal.util.guava.Optional;
import org.whispersystems.signalservice.api.crypto.UnidentifiedAccess;
import org.whispersystems.signalservice.api.crypto.UnidentifiedAccessPair;
import org.whispersystems.signalservice.api.push.SignalServiceAddress;
import java.io.IOException;
@ -28,12 +30,7 @@ public class UnidentifiedAccessUtil {
private static final String TAG = UnidentifiedAccessUtil.class.getSimpleName();
public static CertificateValidator getCertificateValidator() {
try {
ECPublicKey unidentifiedSenderTrustRoot = Curve.decodePoint(Base64.decode(BuildConfig.UNIDENTIFIED_SENDER_TRUST_ROOT), 0);
return new CertificateValidator(unidentifiedSenderTrustRoot);
} catch (InvalidKeyException | IOException e) {
throw new AssertionError(e);
}
return new CertificateValidator();
}
@WorkerThread
@ -48,7 +45,7 @@ public class UnidentifiedAccessUtil {
try {
byte[] theirUnidentifiedAccessKey = getTargetUnidentifiedAccessKey(recipient);
byte[] ourUnidentifiedAccessKey = getSelfUnidentifiedAccessKey(context);
byte[] ourUnidentifiedAccessCertificate = TextSecurePreferences.getUnidentifiedAccessCertificate(context);
byte[] ourUnidentifiedAccessCertificate = getUnidentifiedAccessCertificate(context);
if (TextSecurePreferences.isUniversalUnidentifiedAccess(context)) {
ourUnidentifiedAccessKey = Util.getSecretBytes(16);
@ -83,7 +80,7 @@ public class UnidentifiedAccessUtil {
try {
byte[] ourUnidentifiedAccessKey = getSelfUnidentifiedAccessKey(context);
byte[] ourUnidentifiedAccessCertificate = TextSecurePreferences.getUnidentifiedAccessCertificate(context);
byte[] ourUnidentifiedAccessCertificate = getUnidentifiedAccessCertificate(context);
if (TextSecurePreferences.isUniversalUnidentifiedAccess(context)) {
ourUnidentifiedAccessKey = Util.getSecretBytes(16);
@ -125,4 +122,17 @@ public class UnidentifiedAccessUtil {
throw new AssertionError("Unknown mode: " + recipient.getUnidentifiedAccessMode().getMode());
}
}
private static @Nullable byte[] getUnidentifiedAccessCertificate(Context context) {
String ourNumber = TextSecurePreferences.getLocalNumber(context);
if (ourNumber != null) {
SignalProtos.SenderCertificate certificate = SignalProtos.SenderCertificate.newBuilder()
.setSender(ourNumber)
.setSenderDevice(SignalServiceAddress.DEFAULT_DEVICE_ID)
.build();
return certificate.toByteArray();
}
return null;
}
}

7
src/org/thoughtcrime/securesms/jobs/MultiDeviceContactUpdateJob.java
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@ -29,6 +29,8 @@ import org.thoughtcrime.securesms.util.TextSecurePreferences;
import org.whispersystems.libsignal.IdentityKey;
import org.whispersystems.libsignal.util.guava.Optional;
import org.whispersystems.signalservice.api.SignalServiceMessageSender;
import org.whispersystems.signalservice.api.crypto.UnidentifiedAccess;
import org.whispersystems.signalservice.api.crypto.UnidentifiedAccessPair;
import org.whispersystems.signalservice.api.crypto.UntrustedIdentityException;
import org.whispersystems.signalservice.api.messages.SignalServiceAttachment;
import org.whispersystems.signalservice.api.messages.SignalServiceAttachmentStream;
@ -285,9 +287,12 @@ public class MultiDeviceContactUpdateJob extends BaseJob implements InjectableTy
.build();
SignalServiceAddress messageRecipient = recipient != null ? new SignalServiceAddress(recipient) : null;
Address address = recipient != null ? Address.fromSerialized(recipient) : null;
Optional<UnidentifiedAccessPair> unidentifiedAccess = address != null ? UnidentifiedAccessUtil.getAccessFor(context, Recipient.from(context, address, false)) : Optional.absent();
try {
messageSender.sendMessage(0, SignalServiceSyncMessage.forContacts(new ContactsMessage(attachmentStream, complete)), messageRecipient);
messageSender.sendMessage(0, SignalServiceSyncMessage.forContacts(new ContactsMessage(attachmentStream, complete)), unidentifiedAccess, Optional.fromNullable(messageRecipient));
} catch (IOException ioe) {
throw new NetworkException(ioe);
}

52
src/org/thoughtcrime/securesms/jobs/PushDecryptJob.java
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@ -274,18 +274,14 @@ public class PushDecryptJob extends BaseJob implements InjectableType {
SignalServiceAddress localAddress = new SignalServiceAddress(TextSecurePreferences.getLocalNumber(context));
LokiServiceCipher cipher = new LokiServiceCipher(localAddress, axolotlStore, lokiThreadDatabase, lokiPreKeyRecordDatabase, UnidentifiedAccessUtil.getCertificateValidator());
// Loki - Handle session reset logic
if (!envelope.isFriendRequest() && cipher.getSessionStatus(envelope) == null && envelope.isPreKeySignalMessage()) {
cipher.validateBackgroundMessage(envelope, envelope.getContent());
}
SignalServiceContent content = cipher.decrypt(envelope);
// Loki - Ignore any friend requests that we got before restoration
if (envelope.isFriendRequest() && envelope.getTimestamp() < TextSecurePreferences.getRestorationTime(context)) {
if (content.isFriendRequest() && content.getTimestamp() < TextSecurePreferences.getRestorationTime(context)) {
Log.d("Loki", "Ignoring friend request received before restoration.");
return;
}
SignalServiceContent content = cipher.decrypt(envelope);
if (shouldIgnore(content)) {
Log.i(TAG, "Ignoring message.");
@ -293,12 +289,12 @@ public class PushDecryptJob extends BaseJob implements InjectableType {
}
// Loki - Handle friend request acceptance if needed
acceptFriendRequestIfNeeded(envelope, content);
acceptFriendRequestIfNeeded(content);
// Loki - Store pre key bundle
// We shouldn't store it if it's a pairing message
if (!content.getPairingAuthorisation().isPresent()) {
storePreKeyBundleIfNeeded(envelope, content);
storePreKeyBundleIfNeeded(content);
}
if (content.lokiServiceMessage.isPresent()) {
@ -313,24 +309,24 @@ public class PushDecryptJob extends BaseJob implements InjectableType {
if (rawSenderDisplayName.isPresent() && rawSenderDisplayName.get().length() > 0) {
// If we got a name from our primary device then we set our profile name to match it
String ourPrimaryDevice = TextSecurePreferences.getMasterHexEncodedPublicKey(context);
if (ourPrimaryDevice != null && envelope.getSource().equals(ourPrimaryDevice)) {
if (ourPrimaryDevice != null && content.getSender().equals(ourPrimaryDevice)) {
TextSecurePreferences.setProfileName(context, rawSenderDisplayName.get());
}
// If we receive a message from our device then don't set the display name in the database (as we probably have a alias set for them)
MultiDeviceUtilities.isOneOfOurDevices(context, Address.fromSerialized(content.getSender())).success(isOneOfOurDevice -> {
if (!isOneOfOurDevice) { setDisplayName(envelope.getSource(), rawSenderDisplayName.get()); }
if (!isOneOfOurDevice) { setDisplayName(content.getSender(), rawSenderDisplayName.get()); }
return Unit.INSTANCE;
});
}
if (content.getPairingAuthorisation().isPresent()) {
handlePairingMessage(content.getPairingAuthorisation().get(), envelope, content);
handlePairingMessage(content.getPairingAuthorisation().get(), content);
} else if (content.getDataMessage().isPresent()) {
SignalServiceDataMessage message = content.getDataMessage().get();
boolean isMediaMessage = message.getAttachments().isPresent() || message.getQuote().isPresent() || message.getSharedContacts().isPresent() || message.getPreviews().isPresent() || message.getSticker().isPresent();
if (!envelope.isFriendRequest() && message.isUnpairingRequest()) {
if (!content.isFriendRequest() && message.isUnpairingRequest()) {
// Make sure we got the request from our primary device
String ourPrimaryDevice = TextSecurePreferences.getMasterHexEncodedPublicKey(context);
if (ourPrimaryDevice != null && ourPrimaryDevice.equals(content.getSender())) {
@ -363,7 +359,7 @@ public class PushDecryptJob extends BaseJob implements InjectableType {
}
// Loki - Handle friend request logic if needed
updateFriendRequestStatusIfNeeded(envelope, content, message);
updateFriendRequestStatusIfNeeded(content, message);
}
} else if (content.getSyncMessage().isPresent()) {
TextSecurePreferences.setMultiDevice(context, true);
@ -404,8 +400,8 @@ public class PushDecryptJob extends BaseJob implements InjectableType {
}
// Loki - Handle session reset logic
if (!envelope.isFriendRequest()) {
cipher.handleSessionResetRequestIfNeeded(envelope, cipher.getSessionStatus(envelope));
if (!content.isFriendRequest()) {
cipher.handleSessionResetRequestIfNeeded(content, cipher.getSessionStatus(content));
}
} catch (ProtocolInvalidVersionException e) {
Log.w(TAG, e);
@ -1109,26 +1105,26 @@ public class PushDecryptJob extends BaseJob implements InjectableType {
ApplicationContext.getInstance(context).getJobManager().add(new RetrieveProfileAvatarJob(primaryDevice, url));
}
private void handlePairingMessage(@NonNull PairingAuthorisation authorisation, @NonNull SignalServiceEnvelope envelope, @NonNull SignalServiceContent content) {
private void handlePairingMessage(@NonNull PairingAuthorisation authorisation, @NonNull SignalServiceContent content) {
String userHexEncodedPublicKey = TextSecurePreferences.getLocalNumber(context);
if (authorisation.getType() == PairingAuthorisation.Type.REQUEST) {
handlePairingRequestMessage(authorisation, envelope, content);
handlePairingRequestMessage(authorisation, content);
} else if (authorisation.getSecondaryDevicePublicKey().equals(userHexEncodedPublicKey)) {
handlePairingAuthorisationMessage(authorisation, envelope, content);
handlePairingAuthorisationMessage(authorisation, content);
}
}
private void handlePairingRequestMessage(@NonNull PairingAuthorisation authorisation, @NonNull SignalServiceEnvelope envelope, @NonNull SignalServiceContent content) {
private void handlePairingRequestMessage(@NonNull PairingAuthorisation authorisation, @NonNull SignalServiceContent content) {
boolean isValid = isValidPairingMessage(authorisation);
DeviceLinkingSession linkingSession = DeviceLinkingSession.Companion.getShared();
if (isValid && linkingSession.isListeningForLinkingRequests()) {
// Loki - If we successfully received a request then we should store the PreKeyBundle
storePreKeyBundleIfNeeded(envelope, content);
storePreKeyBundleIfNeeded(content);
linkingSession.processLinkingRequest(authorisation);
}
}
private void handlePairingAuthorisationMessage(@NonNull PairingAuthorisation authorisation, @NonNull SignalServiceEnvelope envelope, @NonNull SignalServiceContent content) {
private void handlePairingAuthorisationMessage(@NonNull PairingAuthorisation authorisation, @NonNull SignalServiceContent content) {
// Prepare
boolean isSecondaryDevice = TextSecurePreferences.getMasterHexEncodedPublicKey(context) != null;
if (isSecondaryDevice) {
@ -1147,7 +1143,7 @@ public class PushDecryptJob extends BaseJob implements InjectableType {
if (authorisation.getType() != PairingAuthorisation.Type.GRANT) { return; }
Log.d("Loki", "Received pairing authorisation message from: " + authorisation.getPrimaryDevicePublicKey() + ".");
// Save PreKeyBundle if for whatever reason we got one
storePreKeyBundleIfNeeded(envelope, content);
storePreKeyBundleIfNeeded(content);
// Process
DeviceLinkingSession.Companion.getShared().processLinkingAuthorization(authorisation);
// Store the primary device's public key
@ -1188,7 +1184,7 @@ public class PushDecryptJob extends BaseJob implements InjectableType {
}
}
private void storePreKeyBundleIfNeeded(@NonNull SignalServiceEnvelope envelope, @NonNull SignalServiceContent content) {
private void storePreKeyBundleIfNeeded(@NonNull SignalServiceContent content) {
Recipient sender = Recipient.from(context, Address.fromSerialized(content.getSender()), false);
if (!sender.isGroupRecipient() && content.lokiServiceMessage.isPresent()) {
LokiServiceMessage lokiMessage = content.lokiServiceMessage.get();
@ -1205,7 +1201,7 @@ public class PushDecryptJob extends BaseJob implements InjectableType {
lokiPreKeyBundleDatabase.setPreKeyBundle(content.getSender(), preKeyBundle);
// Loki - If we received a friend request, but we were already friends with this user, then reset the session
if (envelope.isFriendRequest()) {
if (content.isFriendRequest()) {
long threadID = threadDatabase.getThreadIdIfExistsFor(sender);
if (lokiThreadDatabase.getFriendRequestStatus(threadID) == LokiThreadFriendRequestStatus.FRIENDS) {
resetSession(content.getSender(), threadID);
@ -1218,9 +1214,9 @@ public class PushDecryptJob extends BaseJob implements InjectableType {
}
}
private void acceptFriendRequestIfNeeded(@NonNull SignalServiceEnvelope envelope, @NonNull SignalServiceContent content) {
private void acceptFriendRequestIfNeeded(@NonNull SignalServiceContent content) {
// If we get anything other than a friend request, we can assume that we have a session with the other user
if (envelope.isFriendRequest() || isGroupChatMessage(content)) { return; }
if (content.isFriendRequest() || isGroupChatMessage(content)) { return; }
becomeFriendsWithContact(content.getSender(), true);
}
@ -1251,8 +1247,8 @@ public class PushDecryptJob extends BaseJob implements InjectableType {
});
}
private void updateFriendRequestStatusIfNeeded(@NonNull SignalServiceEnvelope envelope, @NonNull SignalServiceContent content, @NonNull SignalServiceDataMessage message) {
if (!envelope.isFriendRequest() || message.isGroupUpdate()) { return; }
private void updateFriendRequestStatusIfNeeded(@NonNull SignalServiceContent content, @NonNull SignalServiceDataMessage message) {
if (!content.isFriendRequest() || message.isGroupUpdate()) { return; }
// This handles the case where another user sends us a regular message without authorisation
Promise<Boolean, Exception> promise = PromiseUtil.timeout(MultiDeviceUtilities.shouldAutomaticallyBecomeFriendsWithDevice(content.getSender(), context), 8000);
boolean shouldBecomeFriends = PromiseUtil.get(promise, false);

21
src/org/thoughtcrime/securesms/jobs/PushSendJob.java
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@ -280,26 +280,7 @@ public abstract class PushSendJob extends SendJob {
}
protected void rotateSenderCertificateIfNecessary() throws IOException {
try {
byte[] certificateBytes = TextSecurePreferences.getUnidentifiedAccessCertificate(context);
if (certificateBytes == null) {
throw new InvalidCertificateException("No certificate was present.");
}
SenderCertificate certificate = new SenderCertificate(certificateBytes);
if (System.currentTimeMillis() > (certificate.getExpiration() - CERTIFICATE_EXPIRATION_BUFFER)) {
throw new InvalidCertificateException("Certificate is expired, or close to it. Expires on: " + certificate.getExpiration() + ", currently: " + System.currentTimeMillis());
}
Log.d(TAG, "Certificate is valid.");
} catch (InvalidCertificateException e) {
Log.w(TAG, "Certificate was invalid at send time. Fetching a new one.", e);
RotateCertificateJob certificateJob = new RotateCertificateJob(context);
ApplicationContext.getInstance(context).injectDependencies(certificateJob);
certificateJob.onRun();
}
// Loki - We don't need verification on sender certificates
}
protected SignalServiceSyncMessage buildSelfSendSyncMessage(@NonNull Context context, @NonNull SignalServiceDataMessage message, Optional<UnidentifiedAccessPair> syncAccess) {

2
src/org/thoughtcrime/securesms/loki/LokiRSSFeedPoller.kt
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@ -65,7 +65,7 @@ class LokiRSSFeedPoller(private val context: Context, private val feed: LokiRSSF
val id = feed.id.toByteArray()
val x1 = SignalServiceGroup(SignalServiceGroup.Type.UPDATE, id, null, null, null)
val x2 = SignalServiceDataMessage(timestamp, x1, null, body)
val x3 = SignalServiceContent(x2, "Loki", SignalServiceAddress.DEFAULT_DEVICE_ID, timestamp, false)
val x3 = SignalServiceContent(x2, "Loki", SignalServiceAddress.DEFAULT_DEVICE_ID, timestamp, false, false)
PushDecryptJob(context).handleTextMessage(x3, x2, Optional.absent(), Optional.absent())
}
}.fail { exception ->

4
src/org/thoughtcrime/securesms/loki/MultiDeviceUtilities.kt
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@ -13,6 +13,7 @@ import org.thoughtcrime.securesms.ApplicationContext
import org.thoughtcrime.securesms.crypto.IdentityKeyUtil
import org.thoughtcrime.securesms.crypto.PreKeyUtil
import org.thoughtcrime.securesms.crypto.ProfileKeyUtil
import org.thoughtcrime.securesms.crypto.UnidentifiedAccessUtil
import org.thoughtcrime.securesms.database.Address
import org.thoughtcrime.securesms.database.DatabaseFactory
import org.thoughtcrime.securesms.logging.Log
@ -128,7 +129,8 @@ fun sendPairingAuthorisationMessage(context: Context, contactHexEncodedPublicKey
return try {
Log.d("Loki", "Sending authorisation message to: $contactHexEncodedPublicKey.")
val result = messageSender.sendMessage(0, address, Optional.absent<UnidentifiedAccessPair>(), message.build())
val udAccess = UnidentifiedAccessUtil.getAccessFor(context, Recipient.from(context, Address.fromSerialized(contactHexEncodedPublicKey), false))
val result = messageSender.sendMessage(0, address, udAccess, message.build())
if (result.success == null) {
val exception = when {
result.isNetworkFailure -> "Failed to send authorisation message due to a network error."

6
src/org/thoughtcrime/securesms/loki/PushBackgroundMessageSendJob.kt
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@ -1,12 +1,15 @@
package org.thoughtcrime.securesms.loki
import org.thoughtcrime.securesms.ApplicationContext
import org.thoughtcrime.securesms.crypto.UnidentifiedAccessUtil
import org.thoughtcrime.securesms.database.Address
import org.thoughtcrime.securesms.database.DatabaseFactory
import org.thoughtcrime.securesms.jobmanager.Data
import org.thoughtcrime.securesms.jobmanager.Job
import org.thoughtcrime.securesms.jobmanager.impl.NetworkConstraint
import org.thoughtcrime.securesms.jobs.BaseJob
import org.thoughtcrime.securesms.logging.Log
import org.thoughtcrime.securesms.recipients.Recipient
import org.whispersystems.libsignal.util.guava.Optional
import org.whispersystems.signalservice.api.crypto.UnidentifiedAccessPair
import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage
@ -99,7 +102,8 @@ class PushBackgroundMessageSendJob private constructor(
val messageSender = ApplicationContext.getInstance(context).communicationModule.provideSignalMessageSender()
val address = SignalServiceAddress(recipient)
try {
messageSender.sendMessage(-1, address, Optional.absent<UnidentifiedAccessPair>(), dataMessage.build()) // The message ID doesn't matter
val udAccess = UnidentifiedAccessUtil.getAccessFor(context, Recipient.from(context, Address.fromSerialized(recipient), false))
messageSender.sendMessage(-1, address, udAccess, dataMessage.build()) // The message ID doesn't matter
} catch (e: Exception) {
Log.d("Loki", "Failed to send background message to: ${recipient}.")
throw e

5
src/org/thoughtcrime/securesms/loki/PushMessageSyncSendJob.kt
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@ -1,11 +1,13 @@
package org.thoughtcrime.securesms.loki
import org.thoughtcrime.securesms.crypto.UnidentifiedAccessUtil
import org.thoughtcrime.securesms.database.Address
import org.thoughtcrime.securesms.dependencies.InjectableType
import org.thoughtcrime.securesms.jobmanager.Data
import org.thoughtcrime.securesms.jobmanager.Job
import org.thoughtcrime.securesms.jobmanager.impl.NetworkConstraint
import org.thoughtcrime.securesms.jobs.BaseJob
import org.thoughtcrime.securesms.recipients.Recipient
import org.whispersystems.signalservice.api.SignalServiceMessageSender
import org.whispersystems.signalservice.api.crypto.UntrustedIdentityException
import org.whispersystems.signalservice.api.push.SignalServiceAddress
@ -63,7 +65,8 @@ class PushMessageSyncSendJob private constructor(
public override fun onRun() {
// Don't send sync messages to a group
if (recipient.isGroup || recipient.isEmail) { return }
messageSender.lokiSendSyncMessage(messageID, SignalServiceAddress(recipient.toPhoneString()), timestamp, message, ttl)
val unidentifiedAccess = UnidentifiedAccessUtil.getAccessFor(context, Recipient.from(context, recipient, false))
messageSender.lokiSendSyncMessage(messageID, SignalServiceAddress(recipient.toPhoneString()), unidentifiedAccess, timestamp, message, ttl)
}
public override fun onShouldRetry(e: Exception): Boolean {

2
src/org/thoughtcrime/securesms/loki/redesign/messaging/LokiPublicChatPoller.kt
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@ -164,7 +164,7 @@ class LokiPublicChatPoller(private val context: Context, private val group: Loki
val senderPublicKey = primaryDevice ?: message.hexEncodedPublicKey
val serviceDataMessage = getDataMessage(message)
val serviceContent = SignalServiceContent(serviceDataMessage, senderPublicKey, SignalServiceAddress.DEFAULT_DEVICE_ID, message.timestamp, false)
val serviceContent = SignalServiceContent(serviceDataMessage, senderPublicKey, SignalServiceAddress.DEFAULT_DEVICE_ID, message.timestamp, false, false)
if (serviceDataMessage.quote.isPresent || (serviceDataMessage.attachments.isPresent && serviceDataMessage.attachments.get().size > 0) || serviceDataMessage.previews.isPresent) {
PushDecryptJob(context).handleMediaMessage(serviceContent, serviceDataMessage, Optional.absent(), Optional.of(message.serverID))
} else {

2
src/org/thoughtcrime/securesms/recipients/Recipient.java
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@ -101,7 +101,7 @@ public class Recipient implements RecipientModifiedListener {
private String notificationChannel;
private boolean forceSmsSelection;
private @NonNull UnidentifiedAccessMode unidentifiedAccessMode = UnidentifiedAccessMode.DISABLED;
private @NonNull UnidentifiedAccessMode unidentifiedAccessMode = UnidentifiedAccessMode.ENABLED;
@SuppressWarnings("ConstantConditions")
public static @NonNull Recipient from(@NonNull Context context, @NonNull Address address, boolean asynchronous) {

4
src/org/thoughtcrime/securesms/util/TextSecurePreferences.java
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@ -601,7 +601,9 @@ public class TextSecurePreferences {
}
public static boolean isUnidentifiedDeliveryEnabled(Context context) {
return getBooleanPreference(context, UNIDENTIFIED_DELIVERY_ENABLED, true);
// Loki - Always enable unidentified sender
return true;
// return getBooleanPreference(context, UNIDENTIFIED_DELIVERY_ENABLED, true);
}
public static long getSignedPreKeyRotationTime(Context context) {

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