grub/grub-core/osdep/windows/random.c
2013-10-08 17:30:22 +02:00

55 lines
1.4 KiB
C

/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1992-1999,2001,2003,2004,2005,2009,2010,2011,2012,2013 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <grub/types.h>
#include <grub/crypto.h>
#include <grub/auth.h>
#include <grub/emu/misc.h>
#include <grub/util/misc.h>
#include <grub/i18n.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <windows.h>
#include <wincrypt.h>
int
grub_get_random (void *out, grub_size_t len)
{
HCRYPTPROV hCryptProv;
if (!CryptAcquireContext (&hCryptProv,
NULL,
MS_DEF_PROV,
PROV_RSA_FULL,
CRYPT_VERIFYCONTEXT))
return 1;
if (!CryptGenRandom (hCryptProv, len, out))
{
CryptReleaseContext (hCryptProv, 0);
return 1;
}
CryptReleaseContext (hCryptProv, 0);
return 0;
}