1 files changed, 67 insertions, 0 deletions
diff --git a/src/encryption/Olm.cpp b/src/encryption/Olm.cpp
index 8bf2222f..ed84a275 100644
--- a/src/encryption/Olm.cpp
+++ b/src/encryption/Olm.cpp
@@ -874,6 +874,73 @@ mark_keys_as_published()
}
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)
{
if (!UserSettings::instance()->useOnlineKeyBackup()) {
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