| 1 | /* $Id: RTCrRandBytes-openssl.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - Crypto - RTCrRandBytes implementation using OpenSSL.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2018-2020 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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| 31 | #ifdef IPRT_WITH_OPENSSL
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| 32 | # include "internal/iprt.h"
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| 33 | # include <iprt/crypto/misc.h>
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| 34 |
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| 35 | # include <iprt/rand.h>
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| 36 | # include <iprt/assert.h>
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| 37 | # include <iprt/err.h>
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| 38 |
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| 39 | # include "internal/iprt-openssl.h"
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| 40 | # include "openssl/rand.h"
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| 41 |
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| 42 |
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| 43 | RTDECL(int) RTCrRandBytes(void *pvDst, size_t cbDst)
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| 44 | {
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| 45 | /* Make sure the return buffer is always fully initialized in case the caller
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| 46 | doesn't properly check the return value. */
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| 47 | RTRandBytes(pvDst, cbDst); /* */
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| 48 |
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| 49 | /* Get cryptographically strong random. */
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| 50 | rtCrOpenSslInit();
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| 51 | Assert((size_t)(int)cbDst == cbDst);
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| 52 | int rcOpenSsl = RAND_bytes((uint8_t *)pvDst, (int)cbDst);
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| 53 | return rcOpenSsl > 0 ? VINF_SUCCESS : rcOpenSsl == 0 ? VERR_CR_RANDOM_FAILED : VERR_CR_RANDOM_SETUP_FAILED;
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| 54 | }
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| 55 |
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| 56 | #endif /* IPRT_WITH_OPENSSL */
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| 57 |
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