1 files changed, 27 insertions, 0 deletions
diff --git a/src/Olm.cpp b/src/Olm.cpp
index 769b0234..6e130277 100644
--- a/src/Olm.cpp
+++ b/src/Olm.cpp
@@ -136,4 +136,31 @@ handle_olm_normal_message(const std::string &, const std::string &, const OlmCip
log::crypto()->warn("olm(1) not implemeted yet");
}
+mtx::events::msg::Encrypted
+encrypt_group_message(const std::string &room_id,
+ const std::string &device_id,
+ const std::string &body)
+{
+ using namespace mtx::events;
+
+ // Always chech before for existence.
+ auto res = cache::client()->getOutboundMegolmSession(room_id);
+ auto payload = olm::client()->encrypt_group_message(res.session, body);
+
+ // Prepare the m.room.encrypted event.
+ msg::Encrypted data;
+ data.ciphertext = std::string((char *)payload.data(), payload.size());
+ data.sender_key = olm::client()->identity_keys().curve25519;
+ data.session_id = res.data.session_id;
+ data.device_id = device_id;
+
+ auto message_index = olm_outbound_group_session_message_index(res.session);
+ log::crypto()->info("next message_index {}", message_index);
+
+ // We need to re-pickle the session after we send a message to save the new message_index.
+ cache::client()->updateOutboundMegolmSession(room_id, message_index);
+
+ return data;
+}
+
} // namespace olm
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