DSApriv*getdsakey(int argc, char **argv, int needprivate, Attr **pa);
RSApriv*getkey(int argc, char **argv, int needprivate, Attr **pa);
uchar*	put4(uchar *p, uint n);
uchar*	putmp2(uchar *p, mpint *b);
uchar*	putn(uchar *p, void *v, uint n);
uchar*	putstr(uchar *p, char *s);