/* $OpenBSD: arc4random_win.h,v 1.5 2015/01/15 06:57:18 deraadt Exp $ */ /* * Copyright (c) 1996, David Mazieres * Copyright (c) 2008, Damien Miller * Copyright (c) 2013, Markus Friedl * Copyright (c) 2014, Theo de Raadt * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /* * Stub functions for portability. */ #include static volatile HANDLE arc4random_mtx = NULL; /* * Initialize the mutex on the first lock attempt. On collision, each thread * will attempt to allocate a mutex and compare-and-swap it into place as the * global mutex. On failure to swap in the global mutex, the mutex is closed. */ #define _ARC4_LOCK() { \ if (!arc4random_mtx) { \ HANDLE p = CreateMutex(NULL, FALSE, NULL); \ if (InterlockedCompareExchangePointer((void **)&arc4random_mtx, (void *)p, NULL)) \ CloseHandle(p); \ } \ WaitForSingleObject(arc4random_mtx, INFINITE); \ } \ #define _ARC4_UNLOCK() ReleaseMutex(arc4random_mtx) static inline void _getentropy_fail(void) { TerminateProcess(GetCurrentProcess(), 0); } static inline int _rs_allocate(struct _rs **rsp, struct _rsx **rsxp) { *rsp = calloc(1, sizeof(**rsp)); if (*rsp == NULL) return (-1); *rsxp = calloc(1, sizeof(**rsxp)); if (*rsxp == NULL) { free(*rsp); return (-1); } return (0); } static inline void _rs_forkhandler(void) { } static inline void _rs_forkdetect(void) { }