#include <u.h>#include <libc.h>#include <auth.h>#include <mp.h>#include <libsec.h>#include "rsa2any.h" int ssh2; voidusage(void){	fprint(2, "usage: auth/rsa2ssh [-2] [-c comment] [file]\n");	exits("usage");} voidmain(int argc, char **argv){	RSApriv *k;	char *comment;		fmtinstall('B', mpfmt);	fmtinstall('[', encodefmt);	comment = "";	ARGBEGIN{	case '2':		ssh2 = 1;		break;	case 'c':		comment = EARGF(usage());		break;	default:		usage();	}ARGEND 	if(argc > 1)		usage(); 	if((k = getkey(argc, argv, 0, nil)) == nil)		sysfatal("%r"); 	if(ssh2){		uchar buf[8192], *p;				p = buf;		p = put4(p, 7);		p = putn(p, "ssh-rsa", 7);		p = putmp2(p, k->pub.ek);		p = putmp2(p, k->pub.n);		print("ssh-rsa %.*[ %s\n", p-buf, buf, comment);	}else		print("%d %.10B %.10B %s\n", mpsignif(k->pub.n), k->pub.ek,			k->pub.n, comment);	exits(nil);}