PKCS12_add_key_ex
bag = PKCS12_add_key_ex(&bags, pkey, keytype, iter, nid_key, pass,
return PKCS12_add_key_ex(pbags, key, key_usage, iter, nid_key, pass,
PKCS12_SAFEBAG *PKCS12_add_key_ex(STACK_OF(PKCS12_SAFEBAG) **pbags,
bag = PKCS12_add_key_ex(&pb->bags, pkey, 0 /*keytype*/, enc->iter, enc->nid, enc->pass,