fix implicit conversion

FAlbertDev · Sep 27, 2023 · 395aeb0 · 395aeb0
1 parent c6faea5
commit 395aeb0
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/lib/pubkey/hss_lms/hss.cpp b/src/lib/pubkey/hss_lms/hss.cpp
@@ -61,7 +61,8 @@ std::vector<LMS_Tree_Node_Idx> derive_lms_leaf_indices_from_hss_index(HSS_Sig_Id
       HSS_Level layer(layer_ctr);
       const HSS_LMS_Params::LMS_LMOTS_Params_Pair& layer_params = hss_params.params_at_level(layer);
       size_t layer_h = layer_params.lms_params().h();
-      q.at(layer.get()) = LMS_Tree_Node_Idx(static_cast<uint32_t>(hss_idx.get() % (1UL << layer_h)));
+      q.at(layer.get()) =
+         LMS_Tree_Node_Idx(static_cast<uint32_t>(hss_idx.get() % static_cast<uint64_t>(1UL << layer_h)));
       hss_idx = hss_idx >> layer_h;
    }
    BOTAN_ARG_CHECK(hss_idx == HSS_Sig_Idx(0), "HSS Tree is exhausted");