d248a7131f
Change-Id: I29535d3562fe1b8d05b8df1d6c9ab83e4ead0f74 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/163227 Tested-by: Jenkins Reviewed-by: Stephan Bergmann <stephan.bergmann@allotropia.de>
63 lines
1.5 KiB
C++
63 lines
1.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#define _CRT_RAND_S
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#include <stdlib.h>
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#include <memory.h>
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#include <oslrandom.h>
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bool osl_get_system_random_data(char* buffer, size_t desired_len)
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{
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unsigned int val;
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/* if unaligned fill to alignment */
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if (reinterpret_cast<uintptr_t>(buffer) & 3)
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{
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size_t len = 4 - (reinterpret_cast<size_t>(buffer) & 3);
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if (len > desired_len)
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{
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len = desired_len;
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}
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if (rand_s(&val))
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{
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return false;
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}
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memcpy(buffer, &val, len);
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buffer += len;
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desired_len -= len;
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}
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/* fill directly into the buffer as long as we can */
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while (desired_len >= 4)
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{
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if (rand_s(reinterpret_cast<unsigned int*>(buffer)))
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{
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return false;
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}
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else
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{
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buffer += 4;
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desired_len -= 4;
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}
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}
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/* deal with the partial int reminder to fill */
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if (desired_len)
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{
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if (rand_s(&val))
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{
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return false;
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}
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memcpy(buffer, &val, desired_len);
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}
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return true;
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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