PRIV_KEY_MAGIC
kp->priv_key.magic = PRIV_KEY_MAGIC;
MUST_HAVE(((A != NULL) && (A->magic == PRIV_KEY_MAGIC) && (A->params != NULL)), ret, err);
MUST_HAVE(((A != NULL) && (A->magic == PRIV_KEY_MAGIC) &&
kp->priv_key.magic = PRIV_KEY_MAGIC;
priv_key->magic = PRIV_KEY_MAGIC;
priv_key->magic = PRIV_KEY_MAGIC;