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https://github.com/oxen-io/session-android.git
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minor refactor on closed group encryption key pair sending
This commit is contained in:
Ryan ZHAO
parent
e85bf7a45d
commit
0e049469aa
@ -315,7 +315,7 @@ private fun MessageReceiver.handleClosedGroupEncryptionKeyPair(message: ClosedGr
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return
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}
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if (!group.members.map { it.toString() }.contains(senderPublicKey)) {
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android.util.Log.d("Loki", "Ignoring closed group encryption key pair from non-member.")
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Log.d("Loki", "Ignoring closed group encryption key pair from non-member.")
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return
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}
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// Find our wrapper and decrypt it if possible
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@ -362,6 +362,7 @@ private fun MessageReceiver.handleClosedGroupNameChanged(message: ClosedGroupCon
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private fun MessageReceiver.handleClosedGroupMembersAdded(message: ClosedGroupControlMessage) {
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val context = MessagingConfiguration.shared.context
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val storage = MessagingConfiguration.shared.storage
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val userPublicKey = storage.getUserPublicKey()!!
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val senderPublicKey = message.sender ?: return
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val kind = message.kind!! as? ClosedGroupControlMessage.Kind.MembersAdded ?: return
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val groupPublicKey = message.groupPublicKey ?: return
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@ -370,9 +371,7 @@ private fun MessageReceiver.handleClosedGroupMembersAdded(message: ClosedGroupCo
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Log.d("Loki", "Ignoring closed group info message for nonexistent group.")
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return
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}
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if (!isValidGroupUpdate(group, message.sentTimestamp!!, senderPublicKey)) {
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return
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}
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if (!isValidGroupUpdate(group, message.sentTimestamp!!, senderPublicKey)) { return }
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val name = group.title
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// Check common group update logic
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val members = group.members.map { it.serialize() }
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@ -381,11 +380,22 @@ private fun MessageReceiver.handleClosedGroupMembersAdded(message: ClosedGroupCo
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val updateMembers = kind.members.map { it.toByteArray().toHexString() }
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val newMembers = members + updateMembers
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storage.updateMembers(groupID, newMembers.map { Address.fromSerialized(it) })
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// Send the latest encryption key pair to the added members if the current user is the admin of the group
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val isCurrentUserAdmin = admins.contains(storage.getUserPublicKey()!!)
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if (isCurrentUserAdmin) {
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for (member in updateMembers) {
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MessageSender.sendLatestEncryptionKeyPair(member, groupPublicKey)
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if (userPublicKey == senderPublicKey) {
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val threadID = storage.getOrCreateThreadIdFor(Address.fromSerialized(groupID))
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storage.insertOutgoingInfoMessage(context, groupID, SignalServiceProtos.GroupContext.Type.UPDATE, name, members, admins, threadID, message.sentTimestamp!!)
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} else {
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storage.insertIncomingInfoMessage(context, senderPublicKey, groupID, SignalServiceProtos.GroupContext.Type.UPDATE, SignalServiceGroup.Type.UPDATE, name, members, admins, message.sentTimestamp!!)
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}
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if (userPublicKey in admins) {
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// send current encryption key to the latest added members
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val encryptionKeyPair = pendingKeyPair[groupPublicKey]?.orNull()
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?: storage.getLatestClosedGroupEncryptionKeyPair(groupPublicKey)
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if (encryptionKeyPair == null) {
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android.util.Log.d("Loki", "Couldn't get encryption key pair for closed group.")
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} else {
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for (user in updateMembers) {
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MessageSender.sendEncryptionKeyPair(groupPublicKey, encryptionKeyPair, setOf(user), targetUser = user, force = false)
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}
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}
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}
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storage.insertIncomingInfoMessage(context, senderPublicKey, groupID, SignalServiceProtos.GroupContext.Type.UPDATE, SignalServiceGroup.Type.UPDATE, name, members, admins, message.sentTimestamp!!)
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@ -491,7 +501,13 @@ private fun MessageReceiver.handleClosedGroupEncryptionKeyPairRequest(message: C
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return
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}
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if (!isValidGroupUpdate(group, message.sentTimestamp!!, senderPublicKey)) { return }
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MessageSender.sendLatestEncryptionKeyPair(senderPublicKey, groupPublicKey)
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val encryptionKeyPair = pendingKeyPair[groupPublicKey]?.orNull()
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?: storage.getLatestClosedGroupEncryptionKeyPair(groupPublicKey)
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if (encryptionKeyPair == null) {
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Log.d("Loki", "Couldn't get encryption key pair for closed group.")
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} else {
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MessageSender.sendEncryptionKeyPair(groupPublicKey, encryptionKeyPair, setOf(senderPublicKey), targetUser = senderPublicKey, force = false)
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}
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}
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private fun isValidGroupUpdate(group: GroupRecord,
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@ -2,7 +2,9 @@
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package org.session.libsession.messaging.sending_receiving
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import android.content.Context
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import com.google.protobuf.ByteString
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import com.google.protobuf.Message
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import nl.komponents.kovenant.Promise
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import nl.komponents.kovenant.deferred
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@ -27,7 +29,7 @@ import org.session.libsignal.utilities.logging.Log
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import java.util.*
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import java.util.concurrent.ConcurrentHashMap
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private val pendingKeyPair = ConcurrentHashMap<String, Optional<ECKeyPair>>()
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val pendingKeyPair = ConcurrentHashMap<String, Optional<ECKeyPair>>()
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fun MessageSender.create(name: String, members: Collection<String>): Promise<String, Exception> {
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val deferred = deferred<String, Exception>()
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@ -247,6 +249,15 @@ fun MessageSender.generateAndSendNewEncryptionKeyPair(groupPublicKey: String, ta
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// make sure we set the pendingKeyPair or wait until it is not null
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} while (!pendingKeyPair.replace(groupPublicKey,Optional.absent(),Optional.fromNullable(newKeyPair)))
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// Distribute it
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sendEncryptionKeyPair(groupPublicKey, newKeyPair, targetMembers)?.success {
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// Store it * after * having sent out the message to the group
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storage.addClosedGroupEncryptionKeyPair(newKeyPair, groupPublicKey)
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pendingKeyPair[groupPublicKey] = Optional.absent()
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}
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}
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fun MessageSender.sendEncryptionKeyPair(groupPublicKey: String, newKeyPair: ECKeyPair, targetMembers: Collection<String>, targetUser: String? = null, force: Boolean = true): Promise<Unit, Exception>? {
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val destination = targetUser ?: GroupUtil.doubleEncodeGroupID(groupPublicKey)
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val proto = SignalServiceProtos.KeyPair.newBuilder()
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proto.publicKey = ByteString.copyFrom(newKeyPair.publicKey.serialize().removing05PrefixIfNeeded())
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proto.privateKey = ByteString.copyFrom(newKeyPair.privateKey.serialize())
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@ -255,14 +266,15 @@ fun MessageSender.generateAndSendNewEncryptionKeyPair(groupPublicKey: String, ta
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val ciphertext = MessageSenderEncryption.encryptWithSessionProtocol(plaintext, publicKey)
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ClosedGroupControlMessage.KeyPairWrapper(publicKey, ByteString.copyFrom(ciphertext))
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}
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val kind = ClosedGroupControlMessage.Kind.EncryptionKeyPair(null, wrappers)
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val kind = ClosedGroupControlMessage.Kind.EncryptionKeyPair(ByteString.copyFrom(Hex.fromStringCondensed(groupPublicKey)), wrappers)
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val sentTime = System.currentTimeMillis()
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val closedGroupControlMessage = ClosedGroupControlMessage(kind)
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closedGroupControlMessage.sentTimestamp = sentTime
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sendNonDurably(closedGroupControlMessage, Address.fromSerialized(groupID)).success {
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// Store it * after * having sent out the message to the group
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storage.addClosedGroupEncryptionKeyPair(newKeyPair, groupPublicKey)
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pendingKeyPair[groupPublicKey] = Optional.absent()
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return if (force) {
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MessageSender.sendNonDurably(closedGroupControlMessage, Address.fromSerialized(destination))
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} else {
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MessageSender.send(closedGroupControlMessage, Address.fromSerialized(destination))
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null
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}
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}
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@ -281,34 +293,4 @@ fun MessageSender.requestEncryptionKeyPair(groupPublicKey: String) {
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val closedGroupControlMessage = ClosedGroupControlMessage(ClosedGroupControlMessage.Kind.EncryptionKeyPairRequest())
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closedGroupControlMessage.sentTimestamp = sentTime
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send(closedGroupControlMessage, Address.fromSerialized(groupID))
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}
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fun MessageSender.sendLatestEncryptionKeyPair(publicKey: String, groupPublicKey: String) {
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val storage = MessagingConfiguration.shared.storage
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val groupID = GroupUtil.doubleEncodeGroupID(groupPublicKey)
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val group = storage.getGroup(groupID) ?: run {
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Log.d("Loki", "Can't send encryption key pair for nonexistent closed group.")
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throw Error.NoThread
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}
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val members = group.members.map { it.serialize() }
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if (!members.contains(publicKey)) {
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Log.d("Loki", "Refusing to send latest encryption key pair to non-member.")
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return
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}
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// Get the latest encryption key pair
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val encryptionKeyPair = pendingKeyPair[groupPublicKey]?.orNull()
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?: storage.getLatestClosedGroupEncryptionKeyPair(groupPublicKey) ?: return
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// Send it
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val proto = SignalServiceProtos.KeyPair.newBuilder()
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proto.publicKey = ByteString.copyFrom(encryptionKeyPair.publicKey.serialize())
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proto.privateKey = ByteString.copyFrom(encryptionKeyPair.privateKey.serialize())
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val plaintext = proto.build().toByteArray()
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val ciphertext = MessageSenderEncryption.encryptWithSessionProtocol(plaintext, publicKey)
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Log.d("Loki", "Sending latest encryption key pair to: $publicKey.")
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val wrapper = ClosedGroupControlMessage.KeyPairWrapper(publicKey, ByteString.copyFrom(ciphertext))
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val kind = ClosedGroupControlMessage.Kind.EncryptionKeyPair(ByteString.copyFrom(Hex.fromStringCondensed(groupPublicKey)), listOf(wrapper))
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val sentTime = System.currentTimeMillis()
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val closedGroupControlMessage = ClosedGroupControlMessage(kind)
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closedGroupControlMessage.sentTimestamp = sentTime
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MessageSender.send(closedGroupControlMessage, Address.fromSerialized(publicKey))
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}
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