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/* mcookie - generate a 128-bit random number (used for X "magic cookies")
*
* Copyright 2019 AD Isaac Dunham <ibid.ag@gmail.com>
*
* No standard.
*
* -f and -m are not supported: md5sums of arbitrary files are not a good
* source of entropy, just ask the system for 128 bits and print it.
USE_MCOOKIE(NEWTOY(mcookie, "v(verbose)V(version)", TOYFLAG_USR|TOYFLAG_BIN))
config MCOOKIE
bool "mcookie"
default y
help
usage: mcookie [-vV]
Generate a 128-bit strong random number.
-v show entropy source (verbose)
-V show version
*/
#define FOR_mcookie
#include "toys.h"
void mcookie_main(void)
{
long long *ll = (void *)toybuf;
if (FLAG(V)) return (void)puts("mcookie from toybox");
xgetrandom(toybuf, 16, 0);
if (FLAG(v)) fputs("Got 16 bytes from xgetrandom()\n", stderr);
xprintf("%016llx%06llx\n", ll[0], ll[1]);
}
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