extern unsigned long get_certificate_serial(struct client_state *csp);
extern int get_certificate_valid_from_date(char *buffer, size_t buffer_size, const char *fmt);
extern int get_certificate_valid_to_date(char *buffer, size_t buffer_size, const char *fmt);
extern unsigned long get_certificate_serial(struct client_state *csp);
extern int get_certificate_valid_from_date(char *buffer, size_t buffer_size, const char *fmt);
extern int get_certificate_valid_to_date(char *buffer, size_t buffer_size, const char *fmt);