| /* 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]); |
| } |
