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Avoid creating new otk if there are pending to_devices to process

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Valere 2021-12-15 13:31:19 +01:00
parent 5eda8a84d0
commit 270c70d301
1 changed files with 11 additions and 1 deletions
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12
matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/DefaultCryptoService.kt
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@ -428,7 +428,17 @@ internal class DefaultCryptoService @Inject constructor(
val currentCount = syncResponse.deviceOneTimeKeysCount.signedCurve25519 ?: 0
oneTimeKeysUploader.updateOneTimeKeyCount(currentCount)
}
if (isStarted()) {
// There is a limit of to_device events returned per sync.
// If we are in a case of such limited to_device sync we can't try to generate/upload
// new otk now, because there might be some pending olm pre-key to_device messages that would fail if we rotate
// the old otk too early. In this case we want to wait for the pending to_device before doing anything
// As per spec:
// If there is a large queue of send-to-device messages, the server should limit the number sent in each /sync response.
// 100 messages is recommended as a reasonable limit.
// The limit is not part of the spec, so it's probably safer to handle that when there are no more to_device ( so we are sure
// that there are no pending to_device
val toDevices = syncResponse.toDevice?.events.orEmpty()
if (isStarted() && toDevices.isEmpty()) {
// Make sure we process to-device messages before generating new one-time-keys #2782
deviceListManager.refreshOutdatedDeviceLists()
oneTimeKeysUploader.maybeUploadOneTimeKeys()