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/*
* Copyright (c) 2010 SURFnet bv
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*****************************************************************************
MacAlgorithm.cpp
Base class for MAC algorithm classes
*****************************************************************************/
#include "MacAlgorithm.h"
#include <algorithm>
#include <string.h>
MacAlgorithm::MacAlgorithm()
{
currentOperation = NONE;
currentKey = NULL;
}
bool MacAlgorithm::signInit(const SymmetricKey* key)
{
if ((key == NULL) || (currentOperation != NONE))
{
return false;
}
currentKey = key;
currentOperation = SIGN;
return true;
}
bool MacAlgorithm::signUpdate(const ByteString& /*dataToSign*/)
{
if (currentOperation != SIGN)
{
return false;
}
return true;
}
bool MacAlgorithm::signFinal(ByteString& /*signature*/)
{
if (currentOperation != SIGN)
{
return false;
}
currentOperation = NONE;
currentKey = NULL;
return true;
}
bool MacAlgorithm::verifyInit(const SymmetricKey* key)
{
if ((key == NULL) || (currentOperation != NONE))
{
return false;
}
currentOperation = VERIFY;
currentKey = key;
return true;
}
bool MacAlgorithm::verifyUpdate(const ByteString& /*originalData*/)
{
if (currentOperation != VERIFY)
{
return false;
}
return true;
}
bool MacAlgorithm::verifyFinal(ByteString& /*signature*/)
{
if (currentOperation != VERIFY)
{
return false;
}
currentOperation = NONE;
currentKey = NULL;
return true;
}
unsigned long MacAlgorithm::getMinKeySize()
{
return 0;
}
unsigned long MacAlgorithm::getMaxKeySize()
{
return 0;
}
void MacAlgorithm::recycleKey(SymmetricKey* toRecycle)
{
delete toRecycle;
}
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