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Revision as of 05:38, 16 September 2009 by valderind4 (Talk | contribs)

How to calculate hash for a text using QCryptographicHash in Qt

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Article Metadata
Tested with
Devices(s): S60 Emulator
Compatibility
Platform(s): S60 3rd Edition FP1, S60 3rd Edition FP2, S60 5th Edition
Symbian
Article
Keywords: QCryptographicHash,QByteArray
Created: (10 Apr 2009)
Last edited: valderind4 (16 Sep 2009)

Introduction

The QCryptographicHash class provides a way to generate cryptographic hashes.

QCryptographicHash can be used to generate cryptographic hashes of binary or text data.

This cryptography is used when you want to send any data in secure way to the other.The encrypted text is called chiper text.

Preconditions

Some Related Function

  • Adds the data to the cryptographic hash.
QByteArray string="Nokia";
hash->addData(string);
  • Returns the final hash value.
QByteArray string1=hash->result();

Source Code

Main.cpp

#include <QtGui/QApplication>
#include "textcodec.h"
#include<QWidget>
#include<QHBoxLayout>
#include <QCryptographicHash>
#include<QString>
#include<QByteArray>
#include<QLabel>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QWidget *win=new QWidget();
QHBoxLayout *lay=new QHBoxLayout();
QLabel *lbl=new QLabel();
QLabel *lbl1=new QLabel("Encrypted Text:");
lbl1->setBuddy(lbl);
QByteArray string="Nokia";
QCryptographicHash *hash=new QCryptographicHash(QCryptographicHash::Md4);
hash->addData(string);
QByteArray string1=hash->result();
lbl->setText(string1);
lay->addWidget(lbl1);
lay->addWidget(lbl);
win->setLayout(lay);
win->setStyleSheet("* { background-color:rgb(199,147,88); padding: 7px ; color:rgb(255,255,255)}");
win->showMaximized();
return a.exec();
}

ScreenShot

More About QCryptographicHash

Crypto.JPG

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