trsagen.c - plan9port - [fork] Plan 9 from user space
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       ---
       trsagen.c (999B)
       ---
            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 = 1024;
           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, 6, 0);
           46         }while(mpsignif(key->pub.n) != bits);
           47 
           48         s = smprint("key proto=rsa %s%ssize=%d ek=%lB !dk=%lB n=%lB !p=%lB !q=%lB !kp=%lB !kq=%lB !c2=%lB\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 }