From 03498df7a491ca3cc3593af42b98ab68c9993472 Mon Sep 17 00:00:00 2001
From: David Garske <david@wolfssl.com>
Date: Tue, 14 Nov 2023 12:01:35 -0800
Subject: [PATCH] Support public key computation with timing resistance.

---
 src/tpm2_wrap.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/tpm2_wrap.c b/src/tpm2_wrap.c
index e1a52190..d9028da0 100644
--- a/src/tpm2_wrap.c
+++ b/src/tpm2_wrap.c
@@ -3211,7 +3211,11 @@ int wolfTPM2_EccKey_WolfToTpm_ex(WOLFTPM2_DEV* dev, WOLFTPM2_KEY* parentKey,
                 rc = MEMORY_E;
             }
             if (rc == 0) {
+            #ifdef ECC_TIMING_RESISTANT
+                rc = wc_ecc_make_pub_ex(wolfKey, point, wolfKey->rng);
+            #else
                 rc = wc_ecc_make_pub(wolfKey, point);
+            #endif
                 if (rc == 0)
                     rc = wc_export_int(point->x, qx, &qxSz, keySz,
                         WC_TYPE_UNSIGNED_BIN);