From c4a08aff0f3c94d30c32137dfe51f8f66161db50 Mon Sep 17 00:00:00 2001
From: Pol Henarejos <pol.henarejos@cttc.es>
Date: Fri, 21 Jun 2024 21:29:32 +0200
Subject: [PATCH] Upgrade to Mbedtls 3.6

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
---
 pico-keys-sdk    | 2 +-
 src/hsm/sc_hsm.c | 3 +--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/pico-keys-sdk b/pico-keys-sdk
index 218441a..f848029 160000
--- a/pico-keys-sdk
+++ b/pico-keys-sdk
@@ -1 +1 @@
-Subproject commit 218441a45a50993c585ad74b3d0a632d2cf1124e
+Subproject commit f8480291fe2325b6658ee94320aa028eeec98b23
diff --git a/src/hsm/sc_hsm.c b/src/hsm/sc_hsm.c
index 5b76499..69d7a3e 100644
--- a/src/hsm/sc_hsm.c
+++ b/src/hsm/sc_hsm.c
@@ -513,9 +513,8 @@ int store_keys(void *key_ctx, int type, uint8_t key_id) {
     }
     else if (type & PICO_KEYS_KEY_EC) {
         mbedtls_ecdsa_context *ecdsa = (mbedtls_ecdsa_context *) key_ctx;
-        key_size = (uint16_t)mbedtls_mpi_size(&ecdsa->d);
         kdata[0] = ecdsa->grp.id & 0xff;
-        mbedtls_ecp_write_key(ecdsa, kdata + 1, key_size);
+        mbedtls_ecp_write_key_ext(ecdsa, (size_t *)&key_size, kdata + 1, sizeof(kdata) - 1);
         key_size++;
     }
     else if (type & PICO_KEYS_KEY_AES) {