#include <u.h>#include <libc.h>#include <mp.h>#include <fcall.h>#include <thread.h>#include <9p.h>#include <auth.h>#include <authsrv.h>#include <libsec.h>#include "sshtun.h" Cipher *cryptos[1];int debug; voidusage(void){	fprint(2, "usage: rsa2ssh2 [file]\n");	exits("usage");} voidmain(int argc, char *argv[]){	Packet *p;	char *ep, *np, *user;	mpint *e, *n;	int fd, m;	char key[8192], encpub[8192]; 	ARGBEGIN {	default:		usage();	} ARGEND	if (argc > 1)		usage();	user = getenv("user");	if (argc == 0)		fd = 0;	else {		fd = open(argv[0], OREAD);		if (fd < 0)			usage();	}	m = read(fd, key, 8191);	close(fd);	key[m] = 0;	ep = strstr(key, " ek=");	np = strstr(key, " n=");	if (ep == nil || np == nil) {		fprint(2, "Invalid key file\n");		exits("invalid");	}	e = strtomp(ep+4, nil, 16, nil);	n = strtomp(np+3, nil, 16, nil);	p = new_packet(nil);	add_string(p, "ssh-rsa");	add_mp(p, e);	add_mp(p, n);	if ((m = enc64(encpub, 8192, p->payload, p->rlength-1)) < 0) {		fprint(2, "Base 64 encoding failed\n");		exits("fail");	}	print("ssh-rsa ");	write(1, encpub, m);	if (user)		print(" %s\n", user);}