sk_X509_ALGOR_value
md_nid = OBJ_obj2nid(sk_X509_ALGOR_value(mdalgs, i)->algorithm);
x509_alg = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
digestAlgorithm = sk_X509_ALGOR_value(sd->digestAlgorithms, i);
if (!PKCS7_bio_add_digest(&out, sk_X509_ALGOR_value(md_sk, i)))
xa = sk_X509_ALGOR_value(md_sk, i);
alg = sk_X509_ALGOR_value(md_sk, i);