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Enhance key sharing to respect matrix configuration

This commit is contained in:
ariskotsomitopoulos 2022-05-31 11:26:26 +03:00 committed by Valere
parent a9a7400fef
commit d3a516b05d
2 changed files with 23 additions and 3 deletions
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14
matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/algorithms/megolm/MXMegolmDecryption.kt
View File

@ -17,6 +17,7 @@
package org.matrix.android.sdk.internal.crypto.algorithms.megolm
import dagger.Lazy
import org.matrix.android.sdk.api.MatrixConfiguration
import org.matrix.android.sdk.api.logger.LoggerTag
import org.matrix.android.sdk.api.session.crypto.MXCryptoError
import org.matrix.android.sdk.api.session.crypto.NewSessionListener
@ -41,6 +42,7 @@ internal class MXMegolmDecryption(
private val olmDevice: MXOlmDevice,
private val outgoingKeyRequestManager: OutgoingKeyRequestManager,
private val cryptoStore: IMXCryptoStore,
private val matrixConfiguration: MatrixConfiguration,
private val liveEventManager: Lazy<StreamEventsManager>
) : IMXDecrypting {
@ -247,7 +249,7 @@ internal class MXMegolmDecryption(
forwardingCurve25519KeyChain = forwardingCurve25519KeyChain,
keysClaimed = keysClaimed,
exportFormat = exportFormat,
sharedHistory = roomKeyContent.sharedHistory ?: false
sharedHistory = roomKeyContent.getSharedKey()
)
when (addSessionResult) {
@ -298,7 +300,15 @@ internal class MXMegolmDecryption(
}
/**
* Check if the some messages can be decrypted with a new session.
* Returns boolean shared key flag, if enabled with respect to matrix configuration
*/
private fun RoomKeyContent.getSharedKey(): Boolean {
if (!matrixConfiguration.cryptoConfig.shouldShareKeyHistory) return false
return sharedHistory ?: false
}
/**
* Check if the some messages can be decrypted with a new session
*
* @param roomId the room id where the new Megolm session has been created for, may be null when importing from external sessions
* @param senderKey the session sender key

12
matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/crypto/keysbackup/DefaultKeysBackupService.kt
View File

@ -27,6 +27,7 @@ import kotlinx.coroutines.launch
import kotlinx.coroutines.sync.withLock
import kotlinx.coroutines.withContext
import org.matrix.android.sdk.api.MatrixCallback
import org.matrix.android.sdk.api.MatrixConfiguration
import org.matrix.android.sdk.api.MatrixCoroutineDispatchers
import org.matrix.android.sdk.api.auth.data.Credentials
import org.matrix.android.sdk.api.crypto.MXCRYPTO_ALGORITHM_MEGOLM_BACKUP
@ -120,6 +121,7 @@ internal class DefaultKeysBackupService @Inject constructor(
private val updateKeysBackupVersionTask: UpdateKeysBackupVersionTask,
// Task executor
private val taskExecutor: TaskExecutor,
private val matrixConfiguration: MatrixConfiguration,
private val inboundGroupSessionStore: InboundGroupSessionStore,
private val coroutineDispatchers: MatrixCoroutineDispatchers,
private val cryptoCoroutineScope: CoroutineScope
@ -1457,7 +1459,7 @@ internal class DefaultKeysBackupService @Inject constructor(
},
forwardedCount = olmInboundGroupSessionWrapper.sessionData.forwardingCurve25519KeyChain.orEmpty().size,
isVerified = device?.isVerified == true,
sharedHistory = olmInboundGroupSessionWrapper.sessionData.sharedHistory,
sharedHistory = olmInboundGroupSessionWrapper.getSharedKey(),
sessionData = mapOf(
"ciphertext" to encryptedSessionBackupData.mCipherText,
"mac" to encryptedSessionBackupData.mMac,
@ -1466,6 +1468,14 @@ internal class DefaultKeysBackupService @Inject constructor(
)
}
/**
* Returns boolean shared key flag, if enabled with respect to matrix configuration
*/
private fun MXInboundMegolmSessionWrapper.getSharedKey(): Boolean {
if (!matrixConfiguration.cryptoConfig.shouldShareKeyHistory) return false
return sessionData.sharedHistory
}
@VisibleForTesting
@WorkerThread
fun decryptKeyBackupData(keyBackupData: KeyBackupData, sessionId: String, roomId: String, decryption: OlmPkDecryption): MegolmSessionData? {