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Request full online keybackup when turning it on

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This commit is contained in:
Nicolas Werner 2022-06-18 20:16:52 +02:00
parent 2b5b6ca551
commit ead10cd0fd
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GPG key ID: C8D75E610773F2D9
5 changed files with 113 additions and 4 deletions
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67
src/encryption/Olm.cpp
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@ -873,6 +873,73 @@ mark_keys_as_published()
cache::saveOlmAccount(olm::client()->save(cache::client()->pickleSecret()));
}
void
download_full_keybackup()
{
if (!UserSettings::instance()->useOnlineKeyBackup()) {
// Online key backup disabled
return;
}
auto backupVersion = cache::client()->backupVersion();
if (!backupVersion) {
// no trusted OKB
return;
}
using namespace mtx::crypto;
auto decryptedSecret = cache::secret(mtx::secret_storage::secrets::megolm_backup_v1);
if (!decryptedSecret) {
// no backup key available
return;
}
auto sessionDecryptionKey = to_binary_buf(base642bin(*decryptedSecret));
http::client()->room_keys(
backupVersion->version,
[sessionDecryptionKey](const mtx::responses::backup::KeysBackup &bk,
mtx::http::RequestErr err) {
if (err) {
if (err->status_code != 404)
nhlog::crypto()->error("Failed to dowload backup {}:{}: {} - {}",
mtx::errors::to_string(err->matrix_error.errcode),
err->matrix_error.error);
return;
}
mtx::crypto::ExportedSessionKeys allKeys;
try {
for (const auto &[room, roomKey] : bk.rooms) {
for (const auto &[session_id, encSession] : roomKey.sessions) {
auto session = decrypt_session(encSession.session_data, sessionDecryptionKey);
if (session.algorithm != mtx::crypto::MEGOLM_ALGO)
// don't know this algorithm
return;
ExportedSession sess{};
sess.session_id = session_id;
sess.room_id = room;
sess.algorithm = mtx::crypto::MEGOLM_ALGO;
sess.forwarding_curve25519_key_chain =
std::move(session.forwarding_curve25519_key_chain);
sess.sender_claimed_keys = std::move(session.sender_claimed_keys);
sess.sender_key = std::move(session.sender_key);
sess.session_key = std::move(session.session_key);
allKeys.sessions.push_back(std::move(sess));
}
}
// call on UI thread
QTimer::singleShot(0, ChatPage::instance(), [keys = std::move(allKeys)] {
cache::importSessionKeys(keys);
});
} catch (const lmdb::error &e) {
nhlog::crypto()->critical("failed to save inbound megolm session: {}", e.what());
}
});
}
void
lookup_keybackup(const std::string room, const std::string session_id)
{