From 4bb261b015d382a567563571ae4d399a16caebe2 Mon Sep 17 00:00:00 2001 From: "C. McEnroe" Date: Mon, 27 Jul 2020 21:55:29 -0400 Subject: Import LibreSSL 3.2.0 --- compat/arc4random_win.h | 78 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 compat/arc4random_win.h (limited to 'compat/arc4random_win.h') diff --git a/compat/arc4random_win.h b/compat/arc4random_win.h new file mode 100644 index 0000000..deec8a1 --- /dev/null +++ b/compat/arc4random_win.h @@ -0,0 +1,78 @@ +/* $OpenBSD: arc4random_win.h,v 1.6 2016/06/30 12:17:29 bcook 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 = VirtualAlloc(NULL, sizeof(**rsp), + MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); + if (*rsp == NULL) + return (-1); + + *rsxp = VirtualAlloc(NULL, sizeof(**rsxp), + MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); + if (*rsxp == NULL) { + VirtualFree(*rsp, 0, MEM_RELEASE); + *rsp = NULL; + return (-1); + } + return (0); +} + +static inline void +_rs_forkhandler(void) +{ +} + +static inline void +_rs_forkdetect(void) +{ +} -- cgit 1.4.1