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 getentropy(3C)
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi */
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi#include <unistd.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 errbuf[512];
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi uint8_t buf[128];
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = getentropy(buf, sizeof (buf));
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret == 0);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi /* Max buffer is 256 bytes, verify if we go larger, we error */
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = getentropy(errbuf, sizeof (errbuf));
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret == -1);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(errno == EIO);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = getentropy(errbuf, 257);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret == -1);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(errno == EIO);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = getentropy(errbuf, 256);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret == 0);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = getentropy(errbuf, 0);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret == 0);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi /* Bad buffers */
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi ret = getentropy(NULL, sizeof (buf));
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 = getentropy(addr, sizeof (buf));
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(ret == -1);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi assert(errno == EFAULT);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi return (0);
9d12795f87b63c2e39e87bff369182edd34677d3Robert Mustacchi}