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Diffstat (limited to 'util/install/keygen/keyinfo.cpp')
| -rw-r--r-- | util/install/keygen/keyinfo.cpp | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/util/install/keygen/keyinfo.cpp b/util/install/keygen/keyinfo.cpp new file mode 100644 index 0000000..9ad5404 --- /dev/null +++ b/util/install/keygen/keyinfo.cpp @@ -0,0 +1,164 @@ +/**************************************************************************** +** +** 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; +} |