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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the utils of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include <qregexp.h>
#include "keyinfo.h"
// Magic values
enum {
ProductMagic = 0xB292,
PlatformMagic = 0x5C7E,
LicenseSchemaMagic = 0xE3B,
LicenseIDMagic = 0xCE57,
FeatureMagic = 0x4D5
};
static const char Xalphabet[] = "WX9MUEC7AJH3KS6DB4YFG2L5PQRT8VNZ";
static const int XAlphabetSize = sizeof(Xalphabet) - 1;
static QString encodeBaseX(uint k)
{
QString str;
do {
str += QChar(Xalphabet[ k % XAlphabetSize ]);
k /= XAlphabetSize;
} while (k > 0u);
return str;
}
static uint decodeBaseX(const QString &str)
{
uint k = 0;
int i = str.length();
while (i > 0) {
i--;
const char *p = strchr(Xalphabet, str[i].unicode());
if (p == 0) {
return 0;
} else {
k = (k * XAlphabetSize) + (p - Xalphabet);
}
}
return k;
}
static const QDate StartDate(2001, 1, 1);
static const uint MaxDays = 4000;
static QString encodedExpiryDate(const QDate &date)
{
uint days = StartDate.daysTo(date);
if (days >= MaxDays)
days = MaxDays - 1;
uint x = (days << 7) ^ days;
return encodeBaseX(x ^ 0x0000beef);
}
static QDate decodedExpiryDate(const QString &encodedDate)
{
QDate date;
uint y = decodeBaseX(encodedDate);
uint x = y ^ 0x0000beef;
uint days = ( (x >> 7) ^ x ) >> 7;
if (days >= MaxDays)
return QDate();
date = StartDate.addDays( days );
if (encodedExpiryDate(date) != encodedDate)
return QDate();
return date;
}
bool decodeLicenseKey(const QString &licenseKey,
uint *products,
uint *platforms,
uint *licenseSchema,
uint *licenseFeatures,
uint *licenseID,
QDate *expiryDate)
{
QStringList licenseParts;
int dash = -1;
do {
int start = dash + 1;
dash = licenseKey.indexOf('-', start);
licenseParts.append(licenseKey.mid(start, dash - start));
} while (dash != -1);
// license keys have 7 fields
if (licenseParts.size() != 7) {
// invalid key
return false;
}
QString productPart = licenseParts.at(0);
QString platformPart = licenseParts.at(1);
QString licenseSchemaPart = licenseParts.at(2);
QString licenseFeaturesPart = licenseParts.at(3);
QString licenseIDPart = licenseParts.at(4);
QString expiryDatePart = licenseParts.at(5);
QString checksumPart = licenseParts.at(6);
QString keyPart = productPart
+ '-' + platformPart
+ '-' + licenseSchemaPart
+ '-' + licenseFeaturesPart
+ '-' + licenseIDPart
+ '-' + expiryDatePart;
// verify the crc
QByteArray ba = keyPart.toLatin1();
int crc = qChecksum(ba.constData(), ba.size());
QString checksumVerification = QString("%1%2")
.arg((crc & 0xff),2,16,QChar('0'))
.arg((crc >> 8 & 0xff),2,16,QChar('0'))
.toUpper();
if (checksumPart != checksumVerification) {
// invalid checksum
return false;
}
*products = decodeBaseX(productPart) ^ ProductMagic;
*platforms = decodeBaseX(platformPart) ^ PlatformMagic;
*licenseSchema = decodeBaseX(licenseSchemaPart) ^ LicenseSchemaMagic;
*licenseFeatures = decodeBaseX(licenseFeaturesPart) ^ FeatureMagic;
*licenseID = decodeBaseX(licenseIDPart) ^ LicenseIDMagic;
*expiryDate = decodedExpiryDate(expiryDatePart);
return true;
}
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