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Trust key forwards from the original sender

This commit is contained in:
Nicolas Werner 2021-08-20 14:00:16 +02:00
parent 71a153538f
commit 5416988057
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1 changed files with 7 additions and 0 deletions
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7
src/Olm.cpp
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@ -835,6 +835,13 @@ import_inbound_megolm_session(
data.sender_claimed_ed25519_key = roomKey.content.sender_claimed_ed25519_key;
// may have come from online key backup, so we can't trust it...
data.trusted = false;
// if we got it forwarded from the sender, assume it is trusted. They may still have
// used key backup, but it is unlikely.
if (roomKey.content.forwarding_curve25519_key_chain.size() == 1 &&
roomKey.content.forwarding_curve25519_key_chain.back() ==
roomKey.content.sender_key) {
data.trusted = true;
}
cache::saveInboundMegolmSession(index, std::move(megolm_session), data);
} catch (const lmdb::error &e) {