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refactor: message sender + closed group

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Ryan ZHAO 2021-02-09 13:55:01 +11:00
parent c32c58eee7
commit 4cfa5e9f3b
1 changed files with 36 additions and 41 deletions
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77
libsession/src/main/java/org/session/libsession/messaging/sending_receiving/MessageSenderClosedGroup.kt
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@ -24,52 +24,47 @@ import org.session.libsignal.service.loki.protocol.closedgroups.SharedSenderKeys
import org.session.libsignal.service.loki.utilities.hexEncodedPrivateKey
import org.session.libsignal.service.loki.utilities.hexEncodedPublicKey
import org.session.libsignal.service.loki.utilities.removing05PrefixIfNeeded
import org.session.libsignal.utilities.ThreadUtils
import java.util.*
fun MessageSender.createClosedGroup(name: String, members: Collection<String>): Promise<String, Exception> {
val deferred = deferred<String, Exception>()
// Prepare
val context = MessagingConfiguration.shared.context
val storage = MessagingConfiguration.shared.storage
val members = members
val userPublicKey = storage.getUserPublicKey()!!
// Generate a key pair for the group
val groupKeyPair = Curve.generateKeyPair()
val groupPublicKey = groupKeyPair.hexEncodedPublicKey // Includes the "05" prefix
members.plus(userPublicKey)
val membersAsData = members.map { Hex.fromStringCondensed(it) }
// Create ratchets for all members
val senderKeys: List<ClosedGroupSenderKey> = members.map { publicKey ->
val ratchet = SharedSenderKeysImplementation.shared.generateRatchet(groupPublicKey, publicKey)
ClosedGroupSenderKey(Hex.fromStringCondensed(ratchet.chainKey), ratchet.keyIndex, Hex.fromStringCondensed(publicKey))
ThreadUtils.queue {
// Prepare
val context = MessagingConfiguration.shared.context
val storage = MessagingConfiguration.shared.storage
val userPublicKey = storage.getUserPublicKey()!!
val membersAsData = members.map { ByteString.copyFrom(Hex.fromStringCondensed(it)) }
// Generate the group's public key
val groupPublicKey = Curve.generateKeyPair().hexEncodedPublicKey // Includes the "05" prefix
// Generate the key pair that'll be used for encryption and decryption
val encryptionKeyPair = Curve.generateKeyPair()
// Create the group
val groupID = GroupUtil.doubleEncodeGroupID(groupPublicKey)
val admins = setOf( userPublicKey )
val adminsAsData = admins.map { ByteString.copyFrom(Hex.fromStringCondensed(it)) }
storage.createGroup(groupID, name, LinkedList(members.map { Address.fromSerialized(it) }),
null, null, LinkedList(admins.map { Address.fromSerialized(it) }))
storage.setProfileSharing(Address.fromSerialized(groupID), true)
// Send a closed group update message to all members individually
val closedGroupUpdateKind = ClosedGroupControlMessage.Kind.New(ByteString.copyFrom(Hex.fromStringCondensed(groupPublicKey)), name, encryptionKeyPair, membersAsData, adminsAsData)
for (member in members) {
if (member == userPublicKey) { continue }
val closedGroupControlMessage = ClosedGroupControlMessage(closedGroupUpdateKind)
sendNonDurably(closedGroupControlMessage, Address.fromSerialized(groupID)).get()
}
// Add the group to the user's set of public keys to poll for
storage.addClosedGroupPublicKey(groupPublicKey)
// Store the encryption key pair
storage.addClosedGroupEncryptionKeyPair(encryptionKeyPair, groupPublicKey)
// Notify the user
val threadID = storage.getOrCreateThreadIdFor(Address.fromSerialized(groupID))
storage.insertOutgoingInfoMessage(context, groupID, SignalServiceProtos.GroupContext.Type.UPDATE, name, members, admins, threadID)
// Notify the PN server
PushNotificationAPI.performOperation(PushNotificationAPI.ClosedGroupOperation.Subscribe, groupPublicKey, userPublicKey)
// Fulfill the promise
deferred.resolve(groupID)
}
// Create the group
val admins = setOf( userPublicKey )
val adminsAsData = admins.map { Hex.fromStringCondensed(it) }
val groupID = GroupUtil.getEncodedClosedGroupID(GroupUtil.getEncodedClosedGroupID(Hex.fromStringCondensed(groupPublicKey)).toByteArray()) //double encoded
storage.createGroup(groupID, name, LinkedList(members.map { Address.fromSerialized(it) }), null, null, LinkedList(admins.map { Address.fromSerialized(it) }))
storage.setProfileSharing(Address.fromSerialized(groupID), true)
// Send a closed group update message to all members using established channels
val promises = mutableListOf<Promise<Unit, Exception>>()
for (member in members) {
if (member == userPublicKey) { continue }
val closedGroupUpdateKind = ClosedGroupUpdate.Kind.New(Hex.fromStringCondensed(groupPublicKey), name, groupKeyPair.privateKey.serialize(),
senderKeys, membersAsData, adminsAsData)
val closedGroupUpdate = ClosedGroupUpdate()
closedGroupUpdate.kind = closedGroupUpdateKind
val address = Address.fromSerialized(member)
val promise = MessageSender.sendNonDurably(closedGroupUpdate, address)
promises.add(promise)
}
// Add the group to the user's set of public keys to poll for
MessagingConfiguration.shared.sskDatabase.setClosedGroupPrivateKey(groupPublicKey, groupKeyPair.hexEncodedPrivateKey)
// Notify the PN server
PushNotificationAPI.performOperation(PushNotificationAPI.ClosedGroupOperation.Subscribe, groupPublicKey, userPublicKey)
// Notify the user
val threadID =storage.getOrCreateThreadIdFor(Address.fromSerialized(groupID))
storage.insertOutgoingInfoMessage(context, groupID, SignalServiceProtos.GroupContext.Type.UPDATE, name, members, admins, threadID)
// Fulfill the promise
deferred.resolve(groupPublicKey)
// Return
return deferred.promise
}