1 /*
2 * This file and its contents are supplied under the terms of the
3 * Common Development and Distribution License ("CDDL"), version 1.0.
4 * You may only use this file in accordance with the terms of version
5 * 1.0 of the CDDL.
6 *
7 * A full copy of the text of the CDDL should have accompanied this
8 * source. A copy of the CDDL is also available via the Internet at
9 * http://www.illumos.org/license/CDDL.
10 */
11
12 /*
13 * Copyright (c) 2015, Joyent, Inc.
14 */
15
16 /*
17 * Test getentropy(3C)
18 */
19
20 #include <unistd.h>
21 #include <sys/mman.h>
22 #include <assert.h>
23 #include <errno.h>
24
25 int
main(void)26 main(void)
27 {
28 int ret;
29 void *addr;
30 uint8_t errbuf[512];
31 uint8_t buf[128];
32
33 ret = getentropy(buf, sizeof (buf));
34 assert(ret == 0);
35
36 /* Max buffer is 256 bytes, verify if we go larger, we error */
37 ret = getentropy(errbuf, sizeof (errbuf));
38 assert(ret == -1);
39 assert(errno == EIO);
40
41 ret = getentropy(errbuf, 257);
42 assert(ret == -1);
43 assert(errno == EIO);
44
45 ret = getentropy(errbuf, 256);
46 assert(ret == 0);
47
48 ret = getentropy(errbuf, 0);
49 assert(ret == 0);
50
51 /* Bad buffers */
52 ret = getentropy(NULL, sizeof (buf));
53 assert(ret == -1);
54 assert(errno == EFAULT);
55
56 /* Jump through a hoop to know we'll always have a bad address */
57 addr = mmap(NULL, 4096, PROT_READ, MAP_PRIVATE | MAP_ANON, -1, 0);
58 assert(addr != MAP_FAILED);
59 ret = munmap(addr, 4096);
60 assert(ret == 0);
61 ret = getentropy(addr, sizeof (buf));
62 assert(ret == -1);
63 assert(errno == EFAULT);
64
65 return (0);
66 }
67