CC3XX: RSA key parsing fix in PSA interface implementation

When deciding to skip the leading zero in the DER encoding of an
RSA key, correctly test the contents of the memory and not the
address of the pointer, i.e. fix a mishandling of double pointers.

Signed-off-by: Georgios Vasilakis <[email protected]>
Change-Id: I8aff8d8b814600df242252e62ee54405a5405422

Author: Vge0rge

lib/ext/cryptocell-312-runtime/codesafe/src/psa_driver_api/src/cc3xx_internal_rsa_util.c

@@ -75,8 +75,8 @@ static void skip_leading_zero(uint8_t **ptr, size_t *ptr_size)
         return;
     }
 
-    if (*ptr[0] == 0 && (*ptr[1] & 0x80)) {
-        *ptr += 1;
+    if ((*ptr)[0] == 0 && ((*ptr)[1] & 0x80)) {
+        *ptr++;
         *ptr_size -= 1;
     }
 }