@ -25,6 +25,7 @@ import org.whispersystems.signalservice.api.messages.SignalServiceGroup
import org.whispersystems.signalservice.api.messages.SignalServiceGroup.GroupType
import org.whispersystems.signalservice.internal.push.SignalServiceProtos
import org.whispersystems.signalservice.internal.push.SignalServiceProtos.GroupContext
import org.whispersystems.signalservice.loki.api.SnodeAPI
import org.whispersystems.signalservice.loki.protocol.closedgroups.ClosedGroupRatchet
import org.whispersystems.signalservice.loki.protocol.closedgroups.ClosedGroupSenderKey
import org.whispersystems.signalservice.loki.protocol.closedgroups.SharedSenderKeysImplementation
@ -38,7 +39,13 @@ import kotlin.jvm.Throws
object ClosedGroupsProtocol {
val isSharedSenderKeysEnabled = true
val groupSizeLimit = 20
sealed class Error ( val description : String ) : Exception ( ) {
object NoThread : Error ( " Couldn't find a thread associated with the given group public key " )
object NoPrivateKey : Error ( " Couldn't find a private key associated with the given group public key. " )
object InvalidUpdate : Error ( " Invalid group update. " )
}
public fun createClosedGroup ( context : Context , name : String , members : Collection < String > ) : Promise < String , Exception > {
val deferred = deferred < String , Exception > ( )
Thread {
@ -98,123 +105,128 @@ object ClosedGroupsProtocol {
val name = group . title
val oldMembers = group . members . map { it . serialize ( ) } . toSet ( )
val newMembers = oldMembers . minus ( userPublicKey )
update ( context , groupPublicKey , newMembers , name )
return update ( context , groupPublicKey , newMembers , name ) . get ( )
}
public fun update ( context : Context , groupPublicKey : String , members : Collection < String > , name : String ) {
val userPublicKey = TextSecurePreferences . getLocalNumber ( context )
val sskDatabase = DatabaseFactory . getSSKDatabase ( context )
val groupDB = DatabaseFactory . getGroupDatabase ( context )
val groupID = doubleEncodeGroupID ( groupPublicKey )
val group = groupDB . getGroup ( groupID ) . orNull ( )
if ( group == null ) {
Log . d ( " Loki " , " Can't update nonexistent closed group. " )
return
}
val oldMembers = group . members . map { it . serialize ( ) } . toSet ( )
val newMembers = members . minus ( oldMembers )
val membersAsData = members . map { Hex . fromStringCondensed ( it ) }
val admins = group . admins . map { it . serialize ( ) }
val adminsAsData = admins . map { Hex . fromStringCondensed ( it ) }
val groupPrivateKey = DatabaseFactory . getSSKDatabase ( context ) . getClosedGroupPrivateKey ( groupPublicKey )
if ( groupPrivateKey == null ) {
Log . d ( " Loki " , " Couldn't get private key for closed group. " )
return
}
val wasAnyUserRemoved = members . toSet ( ) . intersect ( oldMembers ) != oldMembers . toSet ( )
val removedMembers = oldMembers . minus ( members )
val isUserLeaving = removedMembers . contains ( userPublicKey )
var newSenderKeys = listOf < ClosedGroupSenderKey > ( )
if ( wasAnyUserRemoved ) {
if ( isUserLeaving && removedMembers . count ( ) != 1 ) {
Log . d ( " Loki " , " Can't remove self and others simultaneously. " )
return
public fun update ( context : Context , groupPublicKey : String , members : Collection < String > , name : String ) : Promise < Unit , Exception > {
val deferred = deferred < Unit , Exception > ( )
Thread {
val userPublicKey = TextSecurePreferences . getLocalNumber ( context )
val sskDatabase = DatabaseFactory . getSSKDatabase ( context )
val groupDB = DatabaseFactory . getGroupDatabase ( context )
val groupID = doubleEncodeGroupID ( groupPublicKey )
val group = groupDB . getGroup ( groupID ) . orNull ( )
if ( group == null ) {
Log . d ( " Loki " , " Can't update nonexistent closed group. " )
return @Thread deferred . reject ( Error . NoThread )
}
// Establish sessions if needed
establishSessionsWithMembersIfNeeded ( context , members )
// Send the update to the existing members using established channels (don't include new ratchets as everyone should regenerate new ratchets individually)
for ( member in oldMembers ) {
@Suppress ( " NAME_SHADOWING " )
val closedGroupUpdateKind = ClosedGroupUpdateMessageSendJob . Kind . Info ( Hex . fromStringCondensed ( groupPublicKey ) ,
name , setOf ( ) , membersAsData , adminsAsData )
@Suppress ( " NAME_SHADOWING " )
val job = ClosedGroupUpdateMessageSendJob ( member , closedGroupUpdateKind )
job . setContext ( context )
job . onRun ( ) // Run the job immediately
val oldMembers = group . members . map { it . serialize ( ) } . toSet ( )
val newMembers = members . minus ( oldMembers )
val membersAsData = members . map { Hex . fromStringCondensed ( it ) }
val admins = group . admins . map { it . serialize ( ) }
val adminsAsData = admins . map { Hex . fromStringCondensed ( it ) }
val groupPrivateKey = DatabaseFactory . getSSKDatabase ( context ) . getClosedGroupPrivateKey ( groupPublicKey )
if ( groupPrivateKey == null ) {
Log . d ( " Loki " , " Couldn't get private key for closed group. " )
return @Thread deferred . reject ( Error . NoPrivateKey )
}
// Delete all ratchets (it's important that this happens * after * sending out the update )
sskDatabase . removeAllClosedGroupRatchets ( groupPublicKey )
// Remove the group from the user's set of public keys to poll for if the user is leaving. Otherwise generate a new ratchet and
// send it out to all members (minus the removed ones) using established channels.
if ( isUserLeaving ) {
sskDatabase . removeClosedGroupPrivateKey ( groupPublicKey )
groupDB . setActive ( groupID , false )
groupDB . remove ( groupID , Address . fromSerialized ( userPublicKey ) )
// Notify the PN server
LokiPushNotificationManager . performOperation ( context , ClosedGroupOperation . Unsubscribe , groupPublicKey , userPublicKey )
} else {
// Send closed group update messages to any new members using established channels
for ( member in new Members) {
val wasAnyUserRemoved = members . toSet ( ) . intersect ( oldMembers ) != oldMembers . toSet ( )
val removedMembers = oldMembers . minus ( members )
val isUserLeaving = removedMembers . contains ( userPublicKey )
var newSenderKeys = listOf < ClosedGroupSenderKey > ( )
if ( wasAnyUserRemoved ) {
if ( isUserLeaving && removedMembers . count ( ) != 1 ) {
Log . d ( " Loki " , " Can't remove self and others simultaneously. " )
return @Thread deferred . reject ( Error . InvalidUpdate )
}
// Establish sessions if needed
establishSessionsWithMembersIfNeeded ( context , members )
// Send the update to the existing members using established channels (don't include new ratchets as everyone should regenerate new ratchets individually)
for ( member in old Members) {
@Suppress ( " NAME_SHADOWING " )
val closedGroupUpdateKind = ClosedGroupUpdateMessageSendJob . Kind . New ( Hex . fromStringCondensed ( groupPublicKey ) , name ,
Hex . fromStringCondensed ( groupPrivateKey ) , lis tOf( ) , membersAsData , adminsAsData )
val closedGroupUpdateKind = ClosedGroupUpdateMessageSendJob . Kind . Info ( Hex . fromStringCondensed ( groupPublicKey ) ,
name , se tOf( ) , membersAsData , adminsAsData )
@Suppress ( " NAME_SHADOWING " )
val job = ClosedGroupUpdateMessageSendJob ( member , closedGroupUpdateKind )
ApplicationContext . getInstance ( context ) . jobManager . add ( job )
job . setContext ( context )
job . onRun ( ) // Run the job immediately
}
// Send out the user's new ratchet to all members (minus the removed ones) using established channels
val userRatchet = SharedSenderKeysImplementation . shared . generateRatchet ( groupPublicKey , userPublicKey )
val userSenderKey = ClosedGroupSenderKey ( Hex . fromStringCondensed ( userRatchet . chainKey ) , userRatchet . keyIndex , Hex . fromStringCondensed ( userPublicKey ) )
for ( member in members ) {
if ( member == userPublicKey ) { continue }
// Delete all ratchets (it's important that this happens * after * sending out the update)
sskDatabase . removeAllClosedGroupRatchets ( groupPublicKey )
// Remove the group from the user's set of public keys to poll for if the user is leaving. Otherwise generate a new ratchet and
// send it out to all members (minus the removed ones) using established channels.
if ( isUserLeaving ) {
sskDatabase . removeClosedGroupPrivateKey ( groupPublicKey )
groupDB . setActive ( groupID , false )
groupDB . remove ( groupID , Address . fromSerialized ( userPublicKey ) )
// Notify the PN server
LokiPushNotificationManager . performOperation ( context , ClosedGroupOperation . Unsubscribe , groupPublicKey , userPublicKey )
} else {
// Send closed group update messages to any new members using established channels
for ( member in newMembers ) {
@Suppress ( " NAME_SHADOWING " )
val closedGroupUpdateKind = ClosedGroupUpdateMessageSendJob . Kind . New ( Hex . fromStringCondensed ( groupPublicKey ) , name ,
Hex . fromStringCondensed ( groupPrivateKey ) , listOf ( ) , membersAsData , adminsAsData )
@Suppress ( " NAME_SHADOWING " )
val job = ClosedGroupUpdateMessageSendJob ( member , closedGroupUpdateKind )
ApplicationContext . getInstance ( context ) . jobManager . add ( job )
}
// Send out the user's new ratchet to all members (minus the removed ones) using established channels
val userRatchet = SharedSenderKeysImplementation . shared . generateRatchet ( groupPublicKey , userPublicKey )
val userSenderKey = ClosedGroupSenderKey ( Hex . fromStringCondensed ( userRatchet . chainKey ) , userRatchet . keyIndex , Hex . fromStringCondensed ( userPublicKey ) )
for ( member in members ) {
if ( member == userPublicKey ) { continue }
@Suppress ( " NAME_SHADOWING " )
val closedGroupUpdateKind = ClosedGroupUpdateMessageSendJob . Kind . SenderKey ( Hex . fromStringCondensed ( groupPublicKey ) , userSenderKey )
@Suppress ( " NAME_SHADOWING " )
val job = ClosedGroupUpdateMessageSendJob ( member , closedGroupUpdateKind )
ApplicationContext . getInstance ( context ) . jobManager . add ( job )
}
}
} else if ( newMembers . isNotEmpty ( ) ) {
// Generate ratchets for any new members
newSenderKeys = newMembers . map { publicKey ->
val ratchet = SharedSenderKeysImplementation . shared . generateRatchet ( groupPublicKey , publicKey )
ClosedGroupSenderKey ( Hex . fromStringCondensed ( ratchet . chainKey ) , ratchet . keyIndex , Hex . fromStringCondensed ( publicKey ) )
}
// Send a closed group update message to the existing members with the new members' ratchets (this message is aimed at the group)
val closedGroupUpdateKind = ClosedGroupUpdateMessageSendJob . Kind . Info ( Hex . fromStringCondensed ( groupPublicKey ) , name ,
newSenderKeys , membersAsData , adminsAsData )
val job = ClosedGroupUpdateMessageSendJob ( groupPublicKey , closedGroupUpdateKind )
ApplicationContext . getInstance ( context ) . jobManager . add ( job )
// Establish sessions if needed
establishSessionsWithMembersIfNeeded ( context , newMembers )
// Send closed group update messages to the new members using established channels
var allSenderKeys = sskDatabase . getAllClosedGroupSenderKeys ( groupPublicKey ) ;
allSenderKeys = allSenderKeys . union ( newSenderKeys )
for ( member in newMembers ) {
@Suppress ( " NAME_SHADOWING " )
val closedGroupUpdateKind = ClosedGroupUpdateMessageSendJob . Kind . SenderKey ( Hex . fromStringCondensed ( groupPublicKey ) , userSenderKey )
val closedGroupUpdateKind = ClosedGroupUpdateMessageSendJob . Kind . New ( Hex . fromStringCondensed ( groupPublicKey ) , name ,
Hex . fromStringCondensed ( groupPrivateKey ) , allSenderKeys , membersAsData , adminsAsData )
@Suppress ( " NAME_SHADOWING " )
val job = ClosedGroupUpdateMessageSendJob ( member , closedGroupUpdateKind )
ApplicationContext . getInstance ( context ) . jobManager . add ( job )
}
}
} else if ( newMembers . isNotEmpty ( ) ) {
// Generate ratchets for any new members
newSenderKeys = newMembers . map { publicKey ->
val ratchet = SharedSenderKeysImplementation . shared . generateRatchet ( groupPublicKey , publicKey )
ClosedGroupSenderKey ( Hex . fromStringCondensed ( ratchet . chainKey ) , ratchet . keyIndex , Hex . fromStringCondensed ( publicKey ) )
}
// Send a closed group update message to the existing members with the new members' ratchets (this message is aimed at the group)
val closedGroupUpdateKind = ClosedGroupUpdateMessageSendJob . Kind . Info ( Hex . fromStringCondensed ( groupPublicKey ) , name ,
newSenderKeys , membersAsData , adminsAsData )
val job = ClosedGroupUpdateMessageSendJob ( groupPublicKey , closedGroupUpdateKind )
ApplicationContext . getInstance ( context ) . jobManager . add ( job )
// Establish sessions if needed
establishSessionsWithMembersIfNeeded ( context , newMembers )
// Send closed group update messages to the new members using established channels
var allSenderKeys = sskDatabase . getAllClosedGroupSenderKeys ( groupPublicKey ) ;
allSenderKeys = allSenderKeys . union ( newSenderKeys )
for ( member in newMembers ) {
@Suppress ( " NAME_SHADOWING " )
val closedGroupUpdateKind = ClosedGroupUpdateMessageSendJob . Kind . New ( Hex . fromStringCondensed ( groupPublicKey ) , name ,
Hex . fromStringCondensed ( groupPrivateKey ) , allSenderKeys , membersAsData , adminsAsData )
@Suppress ( " NAME_SHADOWING " )
val job = ClosedGroupUpdateMessageSendJob ( member , closedGroupUpdateKind )
} else {
val allSenderKeys = sskDatabase . getAllClosedGroupSenderKeys ( groupPublicKey ) ;
val closedGroupUpdateKind = ClosedGroupUpdateMessageSendJob . Kind . Info ( Hex . fromStringCondensed ( groupPublicKey ) , name ,
allSenderKeys , membersAsData , adminsAsData )
val job = ClosedGroupUpdateMessageSendJob ( groupPublicKey , closedGroupUpdateKind )
ApplicationContext . getInstance ( context ) . jobManager . add ( job )
}
} else {
val allSenderKeys = sskDatabase . getAllClosedGroupSenderKeys ( groupPublicKey ) ;
val closedGroupUpdateKind = ClosedGroupUpdateMessageSendJob . Kind . Info ( Hex . fromStringCondensed ( groupPublicKey ) , name ,
allSenderKeys , membersAsData , adminsAsData )
val job = ClosedGroupUpdateMessageSendJob ( groupPublicKey , closedGroupUpdateKind )
ApplicationContext . getInstance ( context ) . jobManager . add ( job )
}
// Update the group
groupDB . updateTitle ( groupID , name )
if ( !is UserLeaving ) {
// The call below sets isActive to true, so if the user is leaving we have to use groupDB.remove(...) instead
groupDB . updateMembers ( groupID , members . map { Address . fromSerialized ( it ) } )
}
// Notify the user
val infoType = if ( isUserLeaving ) GroupContext . Type . QUIT else GroupContext . Type . UPDATE
val threadID = DatabaseFactory . getThreadDatabase ( context ) . getThreadIdFor ( Recipient . from ( context , Address . fromSerialized ( groupID ) , false ) )
insertOutgoingInfoMessage ( context , groupID , infoType , name , members , admins , threadID )
// Update the group
groupDB . updateTitle ( groupID , name )
if ( !is UserLeaving ) {
// The call below sets isActive to true, so if the user is leaving we have to use groupDB.remove(...) instead
groupDB . updateMembers ( groupID , members . map { Address . fromSerialized ( it ) } )
}
// Notify the user
val infoType = if ( isUserLeaving ) GroupContext . Type . QUIT else GroupContext . Type . UPDATE
val threadID = DatabaseFactory . getThreadDatabase ( context ) . getThreadIdFor ( Recipient . from ( context , Address . fromSerialized ( groupID ) , false ) )
insertOutgoingInfoMessage ( context , groupID , infoType , name , members , admins , threadID )
deferred . resolve ( Unit )
} . start ( )
return deferred . promise
}
@JvmStatic