| 1 | /* $Id: RTCrRandBytes-openssl.cpp 98103 2023-01-17 14:15:46Z 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) 2018-2023 Oracle and/or its affiliates.
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| 8 | *
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| 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * The contents of this file may alternatively be used under the terms
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| 26 | * of the Common Development and Distribution License Version 1.0
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| 27 | * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
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| 28 | * in the VirtualBox distribution, in which case the provisions of the
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| 29 | * CDDL are applicable instead of those of the GPL.
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| 30 | *
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| 31 | * You may elect to license modified versions of this file under the
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| 32 | * terms and conditions of either the GPL or the CDDL or both.
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| 33 | *
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| 34 | * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
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| 35 | */
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| 36 |
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| 37 |
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| 38 | /*********************************************************************************************************************************
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| 39 | * Header Files *
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| 40 | *********************************************************************************************************************************/
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| 41 | #ifdef IPRT_WITH_OPENSSL
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| 42 | # include "internal/iprt.h"
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| 43 | # include <iprt/crypto/misc.h>
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| 44 |
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| 45 | # include <iprt/rand.h>
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| 46 | # include <iprt/assert.h>
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| 47 | # include <iprt/err.h>
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| 48 |
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| 49 | # include "internal/iprt-openssl.h"
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| 50 | # include "internal/openssl-pre.h"
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| 51 | # include <openssl/rand.h>
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| 52 | # include "internal/openssl-post.h"
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| 53 |
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| 54 |
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| 55 | RTDECL(int) RTCrRandBytes(void *pvDst, size_t cbDst)
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| 56 | {
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| 57 | /* Make sure the return buffer is always fully initialized in case the caller
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| 58 | doesn't properly check the return value. */
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| 59 | RTRandBytes(pvDst, cbDst); /* */
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| 60 |
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| 61 | /* Get cryptographically strong random. */
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| 62 | rtCrOpenSslInit();
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| 63 | Assert((size_t)(int)cbDst == cbDst);
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| 64 | int rcOpenSsl = RAND_bytes((uint8_t *)pvDst, (int)cbDst);
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| 65 | return rcOpenSsl > 0 ? VINF_SUCCESS : rcOpenSsl == 0 ? VERR_CR_RANDOM_FAILED : VERR_CR_RANDOM_SETUP_FAILED;
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| 66 | }
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| 67 |
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| 68 | #endif /* IPRT_WITH_OPENSSL */
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| 69 |
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