sal/rtl/random.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <sal/config.h>
  21
  22 #include <cstdio>
  23 #include <cstdlib>
  24
  25 #include <sal/types.h>
  26 #include <rtl/alloc.h>
  27 #include <rtl/random.h>
  28 #include <oslrandom.h>
  29
  30 namespace {
  31
  32 struct RandomPool_Impl
  33 {
  34 };
  35
  36 }
  37
  38 rtlRandomPool SAL_CALL rtl_random_createPool() SAL_THROW_EXTERN_C()
  39 {
  40     RandomPool_Impl *pImpl = static_cast< RandomPool_Impl* >(rtl_allocateZeroMemory(sizeof(RandomPool_Impl)));
  41     return static_cast< rtlRandomPool >(pImpl);
  42 }
  43
  44 void SAL_CALL rtl_random_destroyPool(rtlRandomPool Pool) SAL_THROW_EXTERN_C()
  45 {
  46     RandomPool_Impl *pImpl = static_cast< RandomPool_Impl* >(Pool);
  47     if (pImpl)
  48     {
  49         rtl_freeZeroMemory (pImpl, sizeof(RandomPool_Impl));
  50     }
  51 }
  52
  53 rtlRandomError SAL_CALL rtl_random_addBytes(
  54     rtlRandomPool Pool, const void *Buffer, sal_Size /*Bytes*/) SAL_THROW_EXTERN_C()
  55 {
  56     RandomPool_Impl *pImpl = static_cast< RandomPool_Impl* >(Pool);
  57     const sal_uInt8 *pBuffer = static_cast< const sal_uInt8* >(Buffer);
  58
  59     if (!pImpl || !pBuffer)
  60         return rtl_Random_E_Argument;
  61
  62     return rtl_Random_E_None;
  63 }
  64
  65 rtlRandomError SAL_CALL rtl_random_getBytes (
  66     rtlRandomPool, void *Buffer, sal_Size Bytes) SAL_THROW_EXTERN_C()
  67 {
  68     sal_uInt8 *pBuffer = static_cast< sal_uInt8* >(Buffer);
  69
  70     if (!pBuffer)
  71         return rtl_Random_E_Argument;
  72
  73     if (!osl_get_system_random_data(static_cast<char*>(Buffer), Bytes))
  74     {
  75         ::std::fprintf(stderr, "rtl_random_getBytes(): cannot read random device, aborting.\n");
  76         ::std::abort();
  77     }
  78     return rtl_Random_E_None;
  79 }
  80
  81 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */