PKCS7_dataDecode
LCRYPTO_USED(PKCS7_dataDecode);
LCRYPTO_ALIAS(PKCS7_dataDecode);
if (!(tmpmem = PKCS7_dataDecode(p7, pkey, NULL, cert))) {
BIO *PKCS7_dataDecode(PKCS7 *p7, EVP_PKEY *pkey, BIO *in_bio, X509 *pcert);