From e78831cd2b28fa67b8c25d086cbce200ef0caaf9 Mon Sep 17 00:00:00 2001
From: Arseny Smirnov <arseny30@gmail.com>
Date: Mon, 29 Jun 2020 19:29:17 +0300
Subject: [PATCH] secret chats: fix CHECK

GitOrigin-RevId: 191ec9b6542f1e861465c862261ed78a93d33886
---
 td/telegram/SecretChatActor.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/td/telegram/SecretChatActor.cpp b/td/telegram/SecretChatActor.cpp
index a983b4a1d..a5569db73 100644
--- a/td/telegram/SecretChatActor.cpp
+++ b/td/telegram/SecretChatActor.cpp
@@ -2138,7 +2138,10 @@ Status SecretChatActor::on_inbound_action(secret_api::decryptedMessageActionRequ
   if (pfs_state_.state != PfsState::Empty) {
     return Status::Error("Unexpected RequestKey");
   }
-  LOG_CHECK(pfs_state_.other_auth_key.empty()) << "TODO: got requestKey, before old key is dropped";
+  if (!pfs_state_.other_auth_key.empty()) {
+    LOG_CHECK(pfs_state_.can_forget_other_key) << "TODO: got requestKey, before old key is dropped";
+    return Status::Error("Unexpected RequestKey (old key is used)");
+  }
   pfs_state_.state = PfsState::SendAccept;
   pfs_state_.handshake = DhHandshake();
   pfs_state_.exchange_id = request_key.exchange_id_;