rsa_algor_to_md
*pmd = rsa_algor_to_md(pss->hashAlgorithm);
*pmgf1md = rsa_algor_to_md(pss->maskHash);
mgf1md = rsa_algor_to_md(oaep->maskHash);
md = rsa_algor_to_md(oaep->hashFunc);