Clear session pin on unload and new session.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>

src/hsm/eac.c

@@ -57,6 +57,7 @@ void sm_derive_all_keys(const uint8_t *derived, size_t derived_len) {
     mbedtls_mpi_grow(&sm_mSSC, sm_blocksize);
     mbedtls_mpi_lset(&sm_mSSC, 0);
     memset(sm_iv, 0, sizeof(sm_iv));
+    sm_session_pin_len = 0;
 }
 
 void sm_set_protocol(MSE_protocol proto) {

src/hsm/sc_hsm.c

@@ -75,6 +75,7 @@ void init_sc_hsm() {
 int sc_hsm_unload() {
     has_session_pin = has_session_sopin = false;
     isUserAuthenticated = false;
+    sm_session_pin_len = 0;
     return HSM_OK;
 }