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/* $Id: RTCrRandBytes-openssl.cpp $ */
/** @file
* IPRT - Crypto - RTCrRandBytes implementation using OpenSSL.
*/
/*
* Copyright (C) 2018-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program 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, in version 3 of the
* License.
*
* This program 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 this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#ifdef IPRT_WITH_OPENSSL
# include "internal/iprt.h"
# include <iprt/crypto/misc.h>
# include <iprt/rand.h>
# include <iprt/assert.h>
# include <iprt/err.h>
# include "internal/iprt-openssl.h"
# include "internal/openssl-pre.h"
# include <openssl/rand.h>
# include "internal/openssl-post.h"
RTDECL(int) RTCrRandBytes(void *pvDst, size_t cbDst)
{
/* Make sure the return buffer is always fully initialized in case the caller
doesn't properly check the return value. */
RTRandBytes(pvDst, cbDst); /* */
/* Get cryptographically strong random. */
rtCrOpenSslInit();
Assert((size_t)(int)cbDst == cbDst);
int rcOpenSsl = RAND_bytes((uint8_t *)pvDst, (int)cbDst);
return rcOpenSsl > 0 ? VINF_SUCCESS : rcOpenSsl == 0 ? VERR_CR_RANDOM_FAILED : VERR_CR_RANDOM_SETUP_FAILED;
}
#endif /* IPRT_WITH_OPENSSL */
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