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