EVP_MD_pkey_type
|| EVP_MD_pkey_type(EVP_MD_CTX_md(mtmp)) == nid)
int EVP_MD_pkey_type(const EVP_MD *md);
LCRYPTO_ALIAS(EVP_MD_pkey_type);
LCRYPTO_USED(EVP_MD_pkey_type);
if (EVP_MD_pkey_type(EVP_MD_CTX_md(mdc)) == md_type)