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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** 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>
#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
*/
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
|
