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98 lines
3.3 KiB
98 lines
3.3 KiB
/***************************************************************************
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* Copyright (C) 2005 by Tarek Saidi *
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* mail@tarek-saidi.de *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; version 2 of the License. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program; if not, write to the *
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* Free Software Foundation, Inc., *
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
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***************************************************************************/
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#include "random.h"
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#if defined(Q_WS_WIN)
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#include <windows.h>
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#include <QSysInfo>
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#endif
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RandomSource::RandomSource(){
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quint8 buffer[100];
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for (int i=0; i<2; i++){
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getRandomWeak(buffer,100);
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yarrowUpdateWeak(i,100*8,100,buffer);
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}
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#ifdef HAS_DEV_RANDOM
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if (QFile::exists("/dev/random")){
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DevRandom* devRandom = new DevRandom(this);
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connect(devRandom, SIGNAL(randomAvailable(int,QByteArray,int)), SLOT(seedStrong(int,QByteArray,int)));
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connect(devRandom, SIGNAL(finished()), SLOT(deleteLater()));
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devRandom->start();
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}
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else{
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deleteLater();
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}
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#else
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deleteLater();
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#endif
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}
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void RandomSource::getRandomWeak(quint8* buffer, int length){
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#if defined(HAS_DEV_RANDOM)
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QFile dev_urandom("/dev/urandom");
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if (dev_urandom.open(QIODevice::ReadOnly|QIODevice::Unbuffered) && dev_urandom.read((char*)buffer,length)==length)
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return;
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#elif defined(Q_WS_WIN)
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// RtlGenRandom
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if (QSysInfo::WindowsVersion>=QSysInfo::WV_XP){
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bool success=false;
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HMODULE hLib=LoadLibraryA("ADVAPI32.DLL");
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if (hLib) {
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BOOLEAN (APIENTRY *pfn)(void*, ULONG) = (BOOLEAN (APIENTRY *)(void*,ULONG))GetProcAddress(hLib,"SystemFunction036");
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if (pfn && pfn(buffer,length)) {
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success=true;
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}
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FreeLibrary(hLib);
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}
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if (success)
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return;
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}
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#endif
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srand(time(NULL));
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for(int i=0;i<length;i++){
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((quint8*)buffer)[i] = (quint8) (rand()%256);
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}
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}
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#ifdef HAS_DEV_RANDOM
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void RandomSource::seedStrong(int source, QByteArray buffer, int length){
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yarrowUpdateStrong(source,length*8,length,(const quint8*)buffer.constData());
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}
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DevRandom::DevRandom(QObject* parent) : QThread(parent){
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}
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void DevRandom::run(){
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QByteArray buffer(50,0);
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for (int i=0; i<2; i++){
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if (getRandomStrong((quint8*)buffer.data(),50))
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emit randomAvailable(i,buffer,50);
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}
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}
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bool DevRandom::getRandomStrong(quint8* buffer, int length){
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QFile dev_random("/dev/random");
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return (dev_random.open(QIODevice::ReadOnly|QIODevice::Unbuffered) && dev_random.read((char*)buffer,length)==length);
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}
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#endif
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