ltk for secure connections

features/FEATURE_BLE/ble/generic/GenericSecurityManager.h

@@ -387,6 +387,11 @@ public:
     // Keys
     //
 
+    virtual void on_secure_connections_ltk_generated(
+        connection_handle_t connection,
+        const ltk_t *ltk
+    );
+
     virtual void on_keys_distributed(
         connection_handle_t connection,
         advertising_peer_address_type_t peer_address_type,

features/FEATURE_BLE/ble/pal/PalSecurityManager.h

@@ -366,6 +366,18 @@ public:
     // Keys
     //
 
+    /**
+     * Store the results of key generation of the stage 2 of secure connections pairing
+     * @see BLUETOOTH SPECIFICATION Version 5.0 | Vol 3, Part H - 2.3.5.6.5
+     *
+     * @param[in] connection connection handle
+     * @param[in] ltk long term key from the peer
+     */
+    virtual void on_secure_connections_ltk_generated(
+        connection_handle_t connection,
+        const ltk_t *ltk
+    ) = 0;
+
     /**
      * Store the results of key distribution after all the keys have been received.
      *

features/FEATURE_BLE/source/generic/GenericSecurityManager.cpp

@@ -801,6 +801,21 @@ void GenericSecurityManager::on_oob_request(connection_handle_t connection) {
 // Keys
 //
 
+void GenericSecurityManager::on_secure_connections_ltk_generated(
+    connection_handle_t connection,
+    const ltk_t *ltk
+) {
+    SecurityEntry_t *entry = _db.get_entry(connection);
+    if (!entry) {
+        return;
+    }
+
+    entry->mitm_ltk = entry->mitm_performed;
+    entry->secure_connections = true;
+
+    _db.set_entry_peer_ltk(connection, ltk);
+}
+
 void GenericSecurityManager::on_keys_distributed(
     connection_handle_t connection,
     advertising_peer_address_type_t peer_address_type,