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//===========================================
// Lumina-DE source code
// Copyright (c) 2015, Ken Moore
// Available under the 3-clause BSD license
// See the LICENSE file for full details
//===========================================
#include "LLockScreen.h"
#include "ui_LLockScreen.h"
#include <unistd.h>
#define NUMTRIES 3
#define DEBUG 1
LLockScreen::LLockScreen(QWidget *parent) : QWidget(parent), ui(new Ui::LLockScreen()){
ui->setupUi(this);
waittime = new QTimer(this);
waittime->setSingleShot(true);
refreshtime = new QTimer(this); //timer to update the wait time display
refreshtime->setInterval(6000); //6 seconds (1/10 second)
connect(ui->tool_unlock, SIGNAL(clicked()), this, SLOT(TryUnlock()) );
connect(ui->line_password, SIGNAL(returnPressed()), this, SLOT(TryUnlock()) );
connect(ui->line_password, SIGNAL(textEdited(QString)), this, SIGNAL(InputDetected()) );
connect(ui->line_password, SIGNAL(cursorPositionChanged(int,int)), this, SIGNAL(InputDetected()) );
connect(waittime, SIGNAL(timeout()), this, SLOT(aboutToShow()) );
connect(refreshtime, SIGNAL(timeout()), this, SLOT(UpdateLockInfo()) );
}
LLockScreen::~LLockScreen(){
}
void LLockScreen::LoadSystemDetails(){
//Run every time the screen is initially locked
QString user = QString(getlogin());
ui->label_username->setText( QString(tr("Locked by: %1")).arg(user) );
ui->label_hostname->setText( QHostInfo::localHostName() );
ui->tool_unlock->setIcon( LXDG::findIcon("document-decrypt","") );
attempts = 0;
}
void LLockScreen::aboutToHide(){
//auto-hide timeout - clear display
ui->line_password->clear();
ui->line_password->clearFocus();
if(refreshtime->isActive()){ refreshtime->stop(); }
ui->line_password->releaseKeyboard();
}
void LLockScreen::aboutToShow(){
if(!waittime->isActive()){
ui->label_info->clear();
this->setEnabled(true);
triesleft = NUMTRIES; //back to initial number of tries
if(refreshtime->isActive()){ refreshtime->stop(); }
}else{
if(!refreshtime->isActive()){ refreshtime->start(); }
}
UpdateLockInfo();
ui->line_password->clear();
ui->line_password->setFocus();
ui->line_password->grabKeyboard();
}
// =================
// PRIVATE SLOTS
// =================
void LLockScreen::UpdateLockInfo(){
QString info;
if(waittime->isActive()){
info = tr("Too Many Failures")+"\n"+ QString(tr("Wait %1 Minutes")).arg( QString::number(qRound(waittime->remainingTime()/6000.0)/10.0) );
}else if(attempts>0){ info.append("\n"+QString(tr("Failed Attempts: %1")).arg(QString::number(attempts)) ); }
ui->label_info->setText(info);
}
void LLockScreen::TryUnlock(){
attempts++;
this->setEnabled(false);
QString pass = ui->line_password->text();
ui->line_password->clear();
//Create a temporary file for the password, then pass that file descriptor to lumina-checkpass
QTemporaryFile *TF = new QTemporaryFile(".XXXXXXXXXX");
TF->setAutoRemove(true);
bool ok = false;
if( TF->open() ){
QTextStream in(TF);
in << pass.toUtf8()+"\0"; //make sure it is null-terminated
TF->close();
if(DEBUG){ qDebug() << "Trying to unlock session:" << getlogin(); }
LUtils::runCommand(ok, "lumina-checkpass",QStringList() << "-f" << TF->fileName() );
if(DEBUG){ qDebug() << " - Success:" << ok; }
ok = true; //bypass for the moment
}
delete TF; //ensure the temporary file is removed **right now** for security purposes
if(ok){
emit ScreenUnlocked();
this->setEnabled(true);
}else{
triesleft--;
if(triesleft>0){
this->setEnabled(true);
}else{
waittime->setInterval( (attempts/NUMTRIES)*60000);
waittime->start();
refreshtime->start();
}
ui->line_password->setFocus();
}
UpdateLockInfo();
}
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