From 8448cbef5256697bda4feee29031f9b2ce35c995 Mon Sep 17 00:00:00 2001
From: Greyson Parrelli <greyson@signal.org>
Date: Thu, 30 Oct 2025 11:39:51 -0400
Subject: [PATCH] Add extra validation to call link exports.

---
 .../securesms/backup/v2/exporters/CallLinkArchiveExporter.kt    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/src/main/java/org/thoughtcrime/securesms/backup/v2/exporters/CallLinkArchiveExporter.kt b/app/src/main/java/org/thoughtcrime/securesms/backup/v2/exporters/CallLinkArchiveExporter.kt
index 11532634f5..0c56e2a105 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/backup/v2/exporters/CallLinkArchiveExporter.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/backup/v2/exporters/CallLinkArchiveExporter.kt
@@ -40,7 +40,7 @@ class CallLinkArchiveExporter(private val cursor: Cursor) : Iterator<ArchiveReci
       id = callLink.recipientId.toLong(),
       callLink = CallLink(
         rootKey = callLink.credentials!!.linkKeyBytes.toByteString(),
-        epoch = callLink.credentials.epochBytes?.takeIf { it.isNotEmpty() }?.toByteString(),
+        epoch = callLink.credentials.epochBytes?.takeIf { it.size == 4 }?.toByteString(),
         adminKey = callLink.credentials.adminPassBytes?.toByteString()?.nullIfEmpty(),
         name = callLink.state.name,
         expirationMs = expirationTime.takeIf { it != Long.MAX_VALUE }?.clampToValidBackupRange() ?: 0,