9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi/*
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * This file and its contents are supplied under the terms of the
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * Common Development and Distribution License ("CDDL"), version 1.0.
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * You may only use this file in accordance with the terms of version
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * 1.0 of the CDDL.
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi *
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * A full copy of the text of the CDDL should have accompanied this
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * source. A copy of the CDDL is also available via the Internet at
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * http://www.illumos.org/license/CDDL.
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi */
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi/*
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * Copyright (c) 2015, Joyent, Inc.
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi */
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi/*
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi * Test getrandom(2)
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi */
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi#include <sys/random.h>
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi#include <sys/mman.h>
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi#include <assert.h>
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi#include <errno.h>
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchiint
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchimain(void)
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi{
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi int ret;
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi void *addr;
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi uint8_t buf[32];
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi uint8_t bigbuf[4096];
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi /* Go through flags values, start with invalid */
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = getrandom(buf, sizeof (buf), 42);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret == -1);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(errno == EINVAL);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = getrandom(buf, sizeof (buf), 0);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret >= 0);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = getrandom(buf, sizeof (buf), GRND_NONBLOCK);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret >= 0);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = getrandom(buf, sizeof (buf), GRND_RANDOM);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret >= 0);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = getrandom(buf, sizeof (buf), GRND_RANDOM | GRND_NONBLOCK);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret >= 0);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = getrandom(buf, sizeof (buf), (GRND_RANDOM | GRND_NONBLOCK) << 1);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret == -1);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(errno == EINVAL);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi /* Bad buffer addresses, eg. EFAULT */
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = getrandom(NULL, sizeof (buf), 0);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret == -1);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(errno == EFAULT);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = getrandom(NULL, sizeof (buf), GRND_RANDOM);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret == -1);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(errno == EFAULT);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi /* Jump through a hoop to know we'll always have a bad address */
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi addr = mmap(NULL, 4096, PROT_READ, MAP_PRIVATE | MAP_ANON, -1, 0);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(addr != MAP_FAILED);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = munmap(addr, 4096);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret == 0);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = getrandom(addr, sizeof (buf), 0);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret == -1);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(errno == EFAULT);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = getrandom(addr, sizeof (buf), GRND_RANDOM);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret == -1);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(errno == EFAULT);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi /* Verify that we get rounded down on a getrandom of /dev/random */
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = getrandom(bigbuf, sizeof (buf), GRND_RANDOM);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret >= 0 && ret < sizeof (bigbuf));
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi /* Do a few simple sets where we know we should get data */
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = getrandom(buf, sizeof (buf), 0);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret == sizeof (buf));
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = getrandom(buf, sizeof (buf), GRND_RANDOM);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret == sizeof (buf));
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi return (0);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi}