static void HMAC_update(const uECC_HashContext *hash_context,
                        const uint8_t *message,
                        unsigned message_size) {
    hash_context->update_hash(hash_context, message, message_size);
}
static void HMAC_update(const uECC_HashContext *hash_context,
                        const uint8_t *message,
                        unsigned message_size) {
    hash_context->update_hash(hash_context, message, message_size);
}