extern int gendh_main(int argc,char *argv[]);
extern int errstr_main(int argc,char *argv[]);
extern int ca_main(int argc,char *argv[]);
extern int crl_main(int argc,char *argv[]);
extern int rsa_main(int argc,char *argv[]);
extern int gendh_main(int argc,char *argv[]);
extern int errstr_main(int argc,char *argv[]);
extern int ca_main(int argc,char *argv[]);
extern int crl_main(int argc,char *argv[]);
extern int rsa_main(int argc,char *argv[]);