9base

revived minimalist port of Plan 9 userland to Unix
git clone git://git.suckless.org/9base
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netcrypt.c (317B)

      1 #include <u.h>
      2 #include <libc.h>
      3 #include <auth.h>
      4 
      5 int
      6 netcrypt(void *key, void *chal)
      7 {
      8 	uchar buf[8], *p;
      9 
     10 	strncpy((char*)buf, chal, 7);
     11 	buf[7] = '\0';
     12 	for(p = buf; *p && *p != '\n'; p++)
     13 		;
     14 	*p = '\0';
     15 	encrypt(key, buf, 8);
     16 	sprint(chal, "%.2ux%.2ux%.2ux%.2ux", buf[0], buf[1], buf[2], buf[3]);
     17 	return 1;
     18 }