ossl_x509_algor_mgf1_decode
oaep->maskHash = ossl_x509_algor_mgf1_decode(oaep->maskGenFunc);
maskHash = ossl_x509_algor_mgf1_decode(pss->maskGenAlgorithm);
dupkey->pss->maskHash = ossl_x509_algor_mgf1_decode(rsa->pss->maskGenAlgorithm);
pss->maskHash = ossl_x509_algor_mgf1_decode(pss->maskGenAlgorithm);
X509_ALGOR *ossl_x509_algor_mgf1_decode(X509_ALGOR *alg);