ssl_get_handshake_evp_md
int ssl_get_handshake_evp_md(SSL *s, const EVP_MD **md);
if (!ssl_get_handshake_evp_md(s, &md)) {
if (!ssl_get_handshake_evp_md(s, &md))
if (!ssl_get_handshake_evp_md(s, &handshake_hash))