tnetkey.c - plan9port - [fork] Plan 9 from user space
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       ---
       tnetkey.c (771B)
       ---
            1 #include <u.h>
            2 #include <libc.h>
            3 #include <libsec.h>
            4 #include <authsrv.h>
            5 
            6 void
            7 usage(void)
            8 {
            9         fprint(2, "usage: netkey\n");
           10         exits("usage");
           11 }
           12 
           13 void
           14 main(int argc, char *argv[])
           15 {
           16         char *chal, *pass, buf[32], key[DESKEYLEN];
           17         char *s;
           18         int n;
           19 
           20         ARGBEGIN{
           21         default:
           22                 usage();
           23         }ARGEND
           24         if(argc)
           25                 usage();
           26 
           27         s = getenv("service");
           28         if(s && strcmp(s, "cpu") == 0){
           29                 fprint(2, "netkey must not be run on the cpu server\n");
           30                 exits("boofhead");
           31         }
           32 
           33         pass = readcons("password", nil, 1);
           34         if(pass == nil)
           35                 sysfatal("reading password: %r");
           36         passtokey(key, pass);
           37 
           38         for(;;){
           39                 chal = readcons("challenge", nil, 0);
           40                 if(chal == nil || *chal == 0)
           41                         exits(nil);
           42                 n = strtol(chal, 0, 10);
           43                 sprint(buf, "%d", n);
           44                 netcrypt(key, buf);
           45                 print("response: %s\n", buf);
           46         }
           47 }