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 * getentropy(3C) is an OpenBSD compatible wrapper around getrandom(2). 18*9d12795fSRobert Mustacchi */ 19*9d12795fSRobert Mustacchi 20*9d12795fSRobert Mustacchi #include <errno.h> 21*9d12795fSRobert Mustacchi #include <sys/random.h> 22*9d12795fSRobert Mustacchi 23*9d12795fSRobert Mustacchi int getentropy(void * buf,size_t buflen)24*9d12795fSRobert Mustacchigetentropy(void *buf, size_t buflen) 25*9d12795fSRobert Mustacchi { 26*9d12795fSRobert Mustacchi int ret; 27*9d12795fSRobert Mustacchi 28*9d12795fSRobert Mustacchi if (buflen > 256) { 29*9d12795fSRobert Mustacchi errno = EIO; 30*9d12795fSRobert Mustacchi return (-1); 31*9d12795fSRobert Mustacchi } 32*9d12795fSRobert Mustacchi 33*9d12795fSRobert Mustacchi ret = getrandom(buf, buflen, 0); 34*9d12795fSRobert Mustacchi if (ret == -1 || ret != buflen) { 35*9d12795fSRobert Mustacchi if (errno != EFAULT) 36*9d12795fSRobert Mustacchi errno = EIO; 37*9d12795fSRobert Mustacchi return (-1); 38*9d12795fSRobert Mustacchi } 39*9d12795fSRobert Mustacchi 40*9d12795fSRobert Mustacchi return (0); 41*9d12795fSRobert Mustacchi } 42