sys/src/cmd/auth/rsagen.c

   1 #include <u.h>
   2 #include <libc.h>
   3 #include <mp.h>
   4 #include <libsec.h>
   5
   6 void
   7 usage(void)
   8 {
   9         fprint(2, "usage: auth/rsagen [-b bits] [-t 'attr=value attr=value ...']\n");
  10         exits("usage");
  11 }
  12
  13 void
  14 main(int argc, char **argv)
  15 {
  16         char *s;
  17         int bits;
  18         char *tag;
  19         RSApriv *key;
  20
  21         bits = 2048;
  22         tag = nil;
  23         key = nil;
  24         fmtinstall('B', mpfmt);
  25
  26         ARGBEGIN{
  27         case 'b':
  28                 bits = atoi(EARGF(usage()));
  29                 if(bits == 0)
  30                         usage();
  31                 break;
  32         case 't':
  33                 tag = EARGF(usage());
  34                 break;
  35         default:
  36                 usage();
  37         }ARGEND
  38
  39         if(argc != 0)
  40                 usage();
  41
  42         do{
  43                 if(key)
  44                         rsaprivfree(key);
  45                 key = rsagen(bits, 0, 0);
  46         }while(mpsignif(key->pub.n) != bits);
  47
  48         s = smprint("key proto=rsa %s%ssize=%d ek=%B !dk=%B n=%B !p=%B !q=%B !kp=%B !kq=%B !c2=%B\n",
  49                 tag ? tag : "", tag ? " " : "",
  50                 mpsignif(key->pub.n), key->pub.ek,
  51                 key->dk, key->pub.n, key->p, key->q,
  52                 key->kp, key->kq, key->c2);
  53         if(s == nil)
  54                 sysfatal("smprint: %r");
  55
  56         if(write(1, s, strlen(s)) != strlen(s))
  57                 sysfatal("write: %r");
  58
  59         exits(nil);
  60 }