CMS_SharedInfo_encode
int CMS_SharedInfo_encode(unsigned char **pder, X509_ALGOR *kekalg,
LCRYPTO_ALIAS(CMS_SharedInfo_encode);
if ((plen = CMS_SharedInfo_encode(&der, kekalg, ukm, keylen)) <= 0)
if ((penclen = CMS_SharedInfo_encode(&penc, wrap_alg, ukm, keylen)) <= 0)
LCRYPTO_USED(CMS_SharedInfo_encode);