diff --git a/src/Cache.cpp b/src/Cache.cpp
index 5a0740f1..d9db99b0 100644
--- a/src/Cache.cpp
+++ b/src/Cache.cpp
@@ -40,7 +40,7 @@
//! Should be changed when a breaking change occurs in the cache format.
//! This will reset client's data.
-static const std::string CURRENT_CACHE_FORMAT_VERSION("2020.07.05");
+static const std::string CURRENT_CACHE_FORMAT_VERSION("2020.10.20");
static const std::string SECRET("secret");
static lmdb::val NEXT_BATCH_KEY("next_batch");
@@ -437,7 +437,9 @@ Cache::getOutboundMegolmSession(const std::string &room_id)
//
void
-Cache::saveOlmSession(const std::string &curve25519, mtx::crypto::OlmSessionPtr session)
+Cache::saveOlmSession(const std::string &curve25519,
+ mtx::crypto::OlmSessionPtr session,
+ uint64_t timestamp)
{
using namespace mtx::crypto;
@@ -447,7 +449,11 @@ Cache::saveOlmSession(const std::string &curve25519, mtx::crypto::OlmSessionPtr
const auto pickled = pickle<SessionObject>(session.get(), SECRET);
const auto session_id = mtx::crypto::session_id(session.get());
- lmdb::dbi_put(txn, db, lmdb::val(session_id), lmdb::val(pickled));
+ StoredOlmSession stored_session;
+ stored_session.pickled_session = pickled;
+ stored_session.last_message_ts = timestamp;
+
+ lmdb::dbi_put(txn, db, lmdb::val(session_id), lmdb::val(json(stored_session).dump()));
txn.commit();
}
@@ -466,13 +472,44 @@ Cache::getOlmSession(const std::string &curve25519, const std::string &session_i
txn.commit();
if (found) {
- auto data = std::string(pickled.data(), pickled.size());
- return unpickle<SessionObject>(data, SECRET);
+ std::string_view raw(pickled.data(), pickled.size());
+ auto data = json::parse(raw).get<StoredOlmSession>();
+ return unpickle<SessionObject>(data.pickled_session, SECRET);
}
return std::nullopt;
}
+std::optional<mtx::crypto::OlmSessionPtr>
+Cache::getLatestOlmSession(const std::string &curve25519)
+{
+ using namespace mtx::crypto;
+
+ auto txn = lmdb::txn::begin(env_);
+ auto db = getOlmSessionsDb(txn, curve25519);
+
+ std::string session_id, pickled_session;
+ std::vector<std::string> res;
+
+ std::optional<StoredOlmSession> currentNewest;
+
+ auto cursor = lmdb::cursor::open(txn, db);
+ while (cursor.get(session_id, pickled_session, MDB_NEXT)) {
+ auto data =
+ json::parse(std::string_view(pickled_session.data(), pickled_session.size()))
+ .get<StoredOlmSession>();
+ if (!currentNewest || currentNewest->last_message_ts < data.last_message_ts)
+ currentNewest = data;
+ }
+ cursor.close();
+
+ txn.commit();
+
+ return currentNewest
+ ? std::optional(unpickle<SessionObject>(currentNewest->pickled_session, SECRET))
+ : std::nullopt;
+}
+
std::vector<std::string>
Cache::getOlmSessions(const std::string &curve25519)
{
@@ -828,6 +865,80 @@ Cache::runMigrations()
nhlog::db()->info("Successfully deleted pending receipts database.");
return true;
}},
+ {"2020.10.20",
+ [this]() {
+ try {
+ using namespace mtx::crypto;
+
+ auto txn = lmdb::txn::begin(env_);
+
+ auto mainDb = lmdb::dbi::open(txn, nullptr);
+
+ std::string dbName, ignored;
+ auto olmDbCursor = lmdb::cursor::open(txn, mainDb);
+ while (olmDbCursor.get(dbName, ignored, MDB_NEXT)) {
+ // skip every db but olm session dbs
+ nhlog::db()->debug("Db {}", dbName);
+ if (dbName.find("olm_sessions/") != 0)
+ continue;
+
+ nhlog::db()->debug("Migrating {}", dbName);
+
+ auto olmDb = lmdb::dbi::open(txn, dbName.c_str());
+
+ std::string session_id, session_value;
+
+ std::vector<std::pair<std::string, StoredOlmSession>> sessions;
+
+ auto cursor = lmdb::cursor::open(txn, olmDb);
+ while (cursor.get(session_id, session_value, MDB_NEXT)) {
+ nhlog::db()->debug("session_id {}, session_value {}",
+ session_id,
+ session_value);
+ StoredOlmSession session;
+ bool invalid = false;
+ for (auto c : session_value)
+ if (!isprint(c)) {
+ invalid = true;
+ break;
+ }
+ if (invalid)
+ continue;
+
+ nhlog::db()->debug("Not skipped");
+
+ session.pickled_session = session_value;
+ sessions.emplace_back(session_id, session);
+ }
+ cursor.close();
+
+ olmDb.drop(txn, true);
+
+ auto newDbName = dbName;
+ newDbName.erase(0, sizeof("olm_sessions") - 1);
+ newDbName = "olm_sessions.v2" + newDbName;
+
+ auto newDb = lmdb::dbi::open(txn, newDbName.c_str(), MDB_CREATE);
+
+ for (const auto &[key, value] : sessions) {
+ nhlog::db()->debug("{}\n{}", key, json(value).dump());
+ lmdb::dbi_put(txn,
+ newDb,
+ lmdb::val(key),
+ lmdb::val(json(value).dump()));
+ }
+ }
+ olmDbCursor.close();
+
+ txn.commit();
+ } catch (const lmdb::error &) {
+ nhlog::db()->critical("Failed to migrate olm sessions,");
+ return false;
+ }
+
+ nhlog::db()->info("Successfully migrated olm sessions.");
+ return true;
+ }},
};
nhlog::db()->info("Running migrations, this may take a while!");
@@ -3629,6 +3740,19 @@ from_json(const nlohmann::json &obj, MegolmSessionIndex &msg)
msg.sender_key = obj.at("sender_key");
}
+void
+to_json(nlohmann::json &obj, const StoredOlmSession &msg)
+{
+ obj["ts"] = msg.last_message_ts;
+ obj["s"] = msg.pickled_session;
+}
+void
+from_json(const nlohmann::json &obj, StoredOlmSession &msg)
+{
+ msg.last_message_ts = obj.at("ts").get<uint64_t>();
+ msg.pickled_session = obj.at("s").get<std::string>();
+}
+
namespace cache {
void
init(const QString &user_id)
@@ -4114,9 +4238,11 @@ inboundMegolmSessionExists(const MegolmSessionIndex &index)
// Olm Sessions
//
void
-saveOlmSession(const std::string &curve25519, mtx::crypto::OlmSessionPtr session)
+saveOlmSession(const std::string &curve25519,
+ mtx::crypto::OlmSessionPtr session,
+ uint64_t timestamp)
{
- instance_->saveOlmSession(curve25519, std::move(session));
+ instance_->saveOlmSession(curve25519, std::move(session), timestamp);
}
std::vector<std::string>
getOlmSessions(const std::string &curve25519)
@@ -4128,6 +4254,11 @@ getOlmSession(const std::string &curve25519, const std::string &session_id)
{
return instance_->getOlmSession(curve25519, session_id);
}
+std::optional<mtx::crypto::OlmSessionPtr>
+getLatestOlmSession(const std::string &curve25519)
+{
+ return instance_->getLatestOlmSession(curve25519);
+}
void
saveOlmAccount(const std::string &pickled)
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