jehanne/sys/src/cmd/auth/rsa2ssh.c

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2018-01-06 01:08:25 +01:00
/*
* This file is part of the UCB release of Plan 9. It is subject to the license
* terms in the LICENSE file found in the top-level directory of this
* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
* part of the UCB release of Plan 9, including this file, may be copied,
* modified, propagated, or distributed except according to the terms contained
* in the LICENSE file.
*/
/* Portions of this file are Copyright (C) 2015-2018 Giacomo Tesio <giacomo@tesio.it>
* See /doc/license/gpl-2.0.txt for details about the licensing.
*/
/* Portions of this file are Copyright (C) 9front's team.
* See /doc/license/9front-mit for details about the licensing.
* See http://code.9front.org/hg/plan9front/ for a list of authors.
*/
#include <u.h>
#include <lib9.h>
#include <auth.h>
#include <mp.h>
#include <libsec.h>
#include "rsa2any.h"
void
usage(void)
{
fprint(2, "usage: auth/rsa2ssh [-2] [-c comment] [file]\n");
exits("usage");
}
void
main(int argc, char **argv)
{
RSApriv *k;
int ssh2;
char *comment;
fmtinstall('B', mpfmt);
fmtinstall('[', encodefmt);
ssh2 = 0;
comment = "";
ARGBEGIN{
case 'c':
comment = EARGF(usage());
break;
case '2':
ssh2 = 1;
break;
default:
usage();
}ARGEND
if(argc > 1)
usage();
if((k = getrsakey(argc, argv, 0, nil)) == nil)
sysfatal("%r");
if(ssh2) {
uint8_t 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", (int)(p-buf), buf, comment);
} else {
print("%d %.10B %.10B %s\n", mpsignif(k->pub.n), k->pub.ek, k->pub.n, comment);
}
exits(nil);
}