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Diffstat (limited to 'src/corelib/tools/qcryptographichash.cpp')
| -rw-r--r-- | src/corelib/tools/qcryptographichash.cpp | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/src/corelib/tools/qcryptographichash.cpp b/src/corelib/tools/qcryptographichash.cpp new file mode 100644 index 0000000000..630e390563 --- /dev/null +++ b/src/corelib/tools/qcryptographichash.cpp @@ -0,0 +1,200 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtCore module 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 Technology Preview License Agreement accompanying +** this package. +** +** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <qcryptographichash.h> + +#ifdef Q_OS_SYMBIAN +#define _MD5_H_ // Needed to disable system header +#endif + +#include "../../3rdparty/md5/md5.h" +#include "../../3rdparty/md5/md5.cpp" +#include "../../3rdparty/md4/md4.h" +#include "../../3rdparty/md4/md4.cpp" +#include "../../3rdparty/sha1/sha1.cpp" + + +QT_BEGIN_NAMESPACE + +class QCryptographicHashPrivate +{ +public: + QCryptographicHash::Algorithm method; + union { + MD5Context md5Context; + md4_context md4Context; + Sha1State sha1Context; + }; + QByteArray result; +}; + +/*! + \class QCryptographicHash + + \brief The QCryptographicHash class provides a way to generate cryptographic hashes. + + \since 4.3 + + \ingroup tools + \reentrant + + QCryptographicHash can be used to generate cryptographic hashes of binary or text data. + + Currently MD4, MD5, and SHA-1 are supported. +*/ + +/*! + \enum QCryptographicHash::Algorithm + + \value Md4 Generate an MD4 hash sum + \value Md5 Generate an MD5 hash sum + \value Sha1 Generate an SHA1 hash sum +*/ + +/*! + Constructs an object that can be used to create a cryptographic hash from data using \a method. +*/ +QCryptographicHash::QCryptographicHash(Algorithm method) + : d(new QCryptographicHashPrivate) +{ + d->method = method; + reset(); +} + +/*! + Destroys the object. +*/ +QCryptographicHash::~QCryptographicHash() +{ + delete d; +} + +/*! + Resets the object. +*/ +void QCryptographicHash::reset() +{ + switch (d->method) { + case Md4: + md4_init(&d->md4Context); + break; + case Md5: + MD5Init(&d->md5Context); + break; + case Sha1: + sha1InitState(&d->sha1Context); + break; + } + d->result.clear(); +} + +/*! + Adds the first \a length chars of \a data to the cryptographic + hash. +*/ +void QCryptographicHash::addData(const char *data, int length) +{ + switch (d->method) { + case Md4: + md4_update(&d->md4Context, (const unsigned char *)data, length); + break; + case Md5: + MD5Update(&d->md5Context, (const unsigned char *)data, length); + break; + case Sha1: + sha1Update(&d->sha1Context, (const unsigned char *)data, length); + break; + } + d->result.clear(); +} + +/*! + \overload addData() +*/ +void QCryptographicHash::addData(const QByteArray &data) +{ + addData(data.constData(), data.length()); +} + +/*! + Returns the final hash value. + + \sa QByteArray::toHex() +*/ +QByteArray QCryptographicHash::result() const +{ + if (!d->result.isEmpty()) + return d->result; + + switch (d->method) { + case Md4: { + md4_context copy = d->md4Context; + d->result.resize(MD4_RESULTLEN); + md4_final(©, (unsigned char *)d->result.data()); + break; + } + case Md5: { + MD5Context copy = d->md5Context; + d->result.resize(16); + MD5Final(©, (unsigned char *)d->result.data()); + break; + } + case Sha1: { + Sha1State copy = d->sha1Context; + d->result.resize(20); + sha1FinalizeState(©); + sha1ToHash(©, (unsigned char *)d->result.data()); + } + } + return d->result; +} + +/*! + Returns the hash of \a data using \a method. +*/ +QByteArray QCryptographicHash::hash(const QByteArray &data, Algorithm method) +{ + QCryptographicHash hash(method); + hash.addData(data); + return hash.result(); +} + +QT_END_NAMESPACE |