From 3adb735d3ea72551946bd3b8204238383ec25387 Mon Sep 17 00:00:00 2001
From: Chun-Chieh Li <ccli8@nuvoton.com>
Date: Tue, 24 May 2022 16:37:46 +0800
Subject: [PATCH 1/2] M487: Fix typo with DES H/W port

---
 .../drivers/mbedtls/TARGET_NUVOTON/TARGET_M480/des/des_alt.c    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/connectivity/drivers/mbedtls/TARGET_NUVOTON/TARGET_M480/des/des_alt.c b/connectivity/drivers/mbedtls/TARGET_NUVOTON/TARGET_M480/des/des_alt.c
index 83863ca37b..d0bf68dcf6 100644
--- a/connectivity/drivers/mbedtls/TARGET_NUVOTON/TARGET_M480/des/des_alt.c
+++ b/connectivity/drivers/mbedtls/TARGET_NUVOTON/TARGET_M480/des/des_alt.c
@@ -375,7 +375,7 @@ static int mbedtls_des_docrypt(uint16_t keyopt, uint8_t key[3][MBEDTLS_DES_KEY_S
      * 1. BE for byte sequence in word
      * 2. BE for word sequence in double-word
      */
-    TDES_Open(CRPT
+    TDES_Open(CRPT,
             0,                                                // Channel number (0~4) 
             enc,                                                // 0: decode, 1: encode
             (tdes_opmode & CRPT_TDES_CTL_TMODE_Msk) ? 1 : 0,    // 0: DES, 1: TDES 

From b402c97136237baef89cb1a632ee4f361573743f Mon Sep 17 00:00:00 2001
From: Chun-Chieh Li <ccli8@nuvoton.com>
Date: Tue, 24 May 2022 17:35:30 +0800
Subject: [PATCH 2/2] M487: Fix ECP P + P operation

Engine doesn't support P + Q when P and Q are the same. Workaround by 2*P
---
 .../TARGET_NUVOTON/TARGET_M480/ecp/ecp_internal_alt.c        | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/connectivity/drivers/mbedtls/TARGET_NUVOTON/TARGET_M480/ecp/ecp_internal_alt.c b/connectivity/drivers/mbedtls/TARGET_NUVOTON/TARGET_M480/ecp/ecp_internal_alt.c
index c0c116b215..c028923ed7 100644
--- a/connectivity/drivers/mbedtls/TARGET_NUVOTON/TARGET_M480/ecp/ecp_internal_alt.c
+++ b/connectivity/drivers/mbedtls/TARGET_NUVOTON/TARGET_M480/ecp/ecp_internal_alt.c
@@ -502,6 +502,11 @@ NU_STATIC int internal_run_eccop(const mbedtls_ecp_group *grp,
         return MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED;
     }
 
+    /* NOTE: Engine doesn't support P + Q when P and Q are the same. Workaround by 2*P */
+    if (mbedtls_ecp_point_cmp(P, Q) == 0) {
+        return internal_run_eccop(grp, R, NULL, P, NULL, NULL, ECCOP_POINT_DOUBLE);
+    }
+
     int ret;
     bool ecc_done;