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 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