typedef int (TI_session_unique)(tls_session *sess, struct berval *buf, int is_server);
typedef const char *(TI_session_name)(tls_session *s);
typedef int (TI_session_peercert)(tls_session *s, struct berval *der);
typedef int (TI_session_unique)(tls_session *sess, struct berval *buf, int is_server);
typedef const char *(TI_session_name)(tls_session *s);
typedef int (TI_session_peercert)(tls_session *s, struct berval *der);