1*9d12795fSRobert Mustacchi /*
2*9d12795fSRobert Mustacchi * This file and its contents are supplied under the terms of the
3*9d12795fSRobert Mustacchi * Common Development and Distribution License ("CDDL"), version 1.0.
4*9d12795fSRobert Mustacchi * You may only use this file in accordance with the terms of version
5*9d12795fSRobert Mustacchi * 1.0 of the CDDL.
6*9d12795fSRobert Mustacchi *
7*9d12795fSRobert Mustacchi * A full copy of the text of the CDDL should have accompanied this
8*9d12795fSRobert Mustacchi * source. A copy of the CDDL is also available via the Internet at
9*9d12795fSRobert Mustacchi * http://www.illumos.org/license/CDDL.
10*9d12795fSRobert Mustacchi */
11*9d12795fSRobert Mustacchi
12*9d12795fSRobert Mustacchi /*
13*9d12795fSRobert Mustacchi * Copyright (c) 2015, Joyent, Inc.
14*9d12795fSRobert Mustacchi */
15*9d12795fSRobert Mustacchi
16*9d12795fSRobert Mustacchi /*
17*9d12795fSRobert Mustacchi * Test getrandom(2)
18*9d12795fSRobert Mustacchi */
19*9d12795fSRobert Mustacchi
20*9d12795fSRobert Mustacchi #include <sys/random.h>
21*9d12795fSRobert Mustacchi #include <sys/mman.h>
22*9d12795fSRobert Mustacchi #include <assert.h>
23*9d12795fSRobert Mustacchi #include <errno.h>
24*9d12795fSRobert Mustacchi
25*9d12795fSRobert Mustacchi int
main(void)26*9d12795fSRobert Mustacchi main(void)
27*9d12795fSRobert Mustacchi {
28*9d12795fSRobert Mustacchi int ret;
29*9d12795fSRobert Mustacchi void *addr;
30*9d12795fSRobert Mustacchi uint8_t buf[32];
31*9d12795fSRobert Mustacchi uint8_t bigbuf[4096];
32*9d12795fSRobert Mustacchi
33*9d12795fSRobert Mustacchi /* Go through flags values, start with invalid */
34*9d12795fSRobert Mustacchi ret = getrandom(buf, sizeof (buf), 42);
35*9d12795fSRobert Mustacchi assert(ret == -1);
36*9d12795fSRobert Mustacchi assert(errno == EINVAL);
37*9d12795fSRobert Mustacchi
38*9d12795fSRobert Mustacchi ret = getrandom(buf, sizeof (buf), 0);
39*9d12795fSRobert Mustacchi assert(ret >= 0);
40*9d12795fSRobert Mustacchi
41*9d12795fSRobert Mustacchi ret = getrandom(buf, sizeof (buf), GRND_NONBLOCK);
42*9d12795fSRobert Mustacchi assert(ret >= 0);
43*9d12795fSRobert Mustacchi
44*9d12795fSRobert Mustacchi ret = getrandom(buf, sizeof (buf), GRND_RANDOM);
45*9d12795fSRobert Mustacchi assert(ret >= 0);
46*9d12795fSRobert Mustacchi
47*9d12795fSRobert Mustacchi ret = getrandom(buf, sizeof (buf), GRND_RANDOM | GRND_NONBLOCK);
48*9d12795fSRobert Mustacchi assert(ret >= 0);
49*9d12795fSRobert Mustacchi
50*9d12795fSRobert Mustacchi ret = getrandom(buf, sizeof (buf), (GRND_RANDOM | GRND_NONBLOCK) << 1);
51*9d12795fSRobert Mustacchi assert(ret == -1);
52*9d12795fSRobert Mustacchi assert(errno == EINVAL);
53*9d12795fSRobert Mustacchi
54*9d12795fSRobert Mustacchi /* Bad buffer addresses, eg. EFAULT */
55*9d12795fSRobert Mustacchi ret = getrandom(NULL, sizeof (buf), 0);
56*9d12795fSRobert Mustacchi assert(ret == -1);
57*9d12795fSRobert Mustacchi assert(errno == EFAULT);
58*9d12795fSRobert Mustacchi
59*9d12795fSRobert Mustacchi ret = getrandom(NULL, sizeof (buf), GRND_RANDOM);
60*9d12795fSRobert Mustacchi assert(ret == -1);
61*9d12795fSRobert Mustacchi assert(errno == EFAULT);
62*9d12795fSRobert Mustacchi
63*9d12795fSRobert Mustacchi /* Jump through a hoop to know we'll always have a bad address */
64*9d12795fSRobert Mustacchi addr = mmap(NULL, 4096, PROT_READ, MAP_PRIVATE | MAP_ANON, -1, 0);
65*9d12795fSRobert Mustacchi assert(addr != MAP_FAILED);
66*9d12795fSRobert Mustacchi ret = munmap(addr, 4096);
67*9d12795fSRobert Mustacchi assert(ret == 0);
68*9d12795fSRobert Mustacchi ret = getrandom(addr, sizeof (buf), 0);
69*9d12795fSRobert Mustacchi assert(ret == -1);
70*9d12795fSRobert Mustacchi assert(errno == EFAULT);
71*9d12795fSRobert Mustacchi ret = getrandom(addr, sizeof (buf), GRND_RANDOM);
72*9d12795fSRobert Mustacchi assert(ret == -1);
73*9d12795fSRobert Mustacchi assert(errno == EFAULT);
74*9d12795fSRobert Mustacchi
75*9d12795fSRobert Mustacchi /* Verify that we get rounded down on a getrandom of /dev/random */
76*9d12795fSRobert Mustacchi ret = getrandom(bigbuf, sizeof (buf), GRND_RANDOM);
77*9d12795fSRobert Mustacchi assert(ret >= 0 && ret < sizeof (bigbuf));
78*9d12795fSRobert Mustacchi
79*9d12795fSRobert Mustacchi /* Do a few simple sets where we know we should get data */
80*9d12795fSRobert Mustacchi ret = getrandom(buf, sizeof (buf), 0);
81*9d12795fSRobert Mustacchi assert(ret == sizeof (buf));
82*9d12795fSRobert Mustacchi ret = getrandom(buf, sizeof (buf), GRND_RANDOM);
83*9d12795fSRobert Mustacchi assert(ret == sizeof (buf));
84*9d12795fSRobert Mustacchi
85*9d12795fSRobert Mustacchi return (0);
86*9d12795fSRobert Mustacchi }
87