trsa2ssh.c - plan9port - [fork] Plan 9 from user space
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       ---
       trsa2ssh.c (873B)
       ---
            1 #include <u.h>
            2 #include <libc.h>
            3 #include <auth.h>
            4 #include <mp.h>
            5 #include <libsec.h>
            6 #include "rsa2any.h"
            7 
            8 int ssh2;
            9 
           10 void
           11 usage(void)
           12 {
           13         fprint(2, "usage: auth/rsa2ssh [-2] [-c comment] [file]\n");
           14         exits("usage");
           15 }
           16 
           17 void
           18 main(int argc, char **argv)
           19 {
           20         RSApriv *k;
           21         char *comment;
           22 
           23         fmtinstall('B', mpfmt);
           24         fmtinstall('[', encodefmt);
           25         comment = "";
           26         ARGBEGIN{
           27         case '2':
           28                 ssh2 = 1;
           29                 break;
           30         case 'c':
           31                 comment = EARGF(usage());
           32                 break;
           33         default:
           34                 usage();
           35         }ARGEND
           36 
           37         if(argc > 1)
           38                 usage();
           39 
           40         if((k = getkey(argc, argv, 0, nil)) == nil)
           41                 sysfatal("%r");
           42 
           43         if(ssh2){
           44                 uchar buf[8192], *p;
           45 
           46                 p = buf;
           47                 p = put4(p, 7);
           48                 p = putn(p, "ssh-rsa", 7);
           49                 p = putmp2(p, k->pub.ek);
           50                 p = putmp2(p, k->pub.n);
           51                 print("ssh-rsa %.*[ %s\n", p-buf, buf, comment);
           52         }else
           53                 print("%d %.10B %.10B %s\n", mpsignif(k->pub.n), k->pub.ek,
           54                         k->pub.n, comment);
           55         exits(nil);
           56 }