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/* $Id: RTCrRandBytes-openssl.cpp $ */
/** @file
* IPRT - Crypto - RTCrRandBytes implementation using OpenSSL.
*/
/*
* Copyright (C) 2018-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE 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.
*/
/*********************************************************************************************************************************
* 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 "openssl/rand.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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