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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.
*/
/*****************************************************************************
OSSLEVPSymmetricAlgorithm.h
OpenSSL symmetric algorithm implementation
*****************************************************************************/
#ifndef _SOFTHSM_V2_OSSLEVPSYMMETRICALGORITHM_H
#define _SOFTHSM_V2_OSSLEVPSYMMETRICALGORITHM_H
#include <openssl/evp.h>
#include <string>
#include "config.h"
#include "SymmetricKey.h"
#include "SymmetricAlgorithm.h"
class OSSLEVPSymmetricAlgorithm : public SymmetricAlgorithm
{
public:
// Constructor
OSSLEVPSymmetricAlgorithm();
// Destructor
virtual ~OSSLEVPSymmetricAlgorithm();
// Encryption functions
virtual bool encryptInit(const SymmetricKey* key, const SymMode::Type mode = SymMode::CBC, const ByteString& IV = ByteString(), bool padding = true, size_t counterBits = 0, const ByteString& aad = ByteString(), size_t tagBytes = 0);
virtual bool encryptUpdate(const ByteString& data, ByteString& encryptedData);
virtual bool encryptFinal(ByteString& encryptedData);
// Decryption functions
virtual bool decryptInit(const SymmetricKey* key, const SymMode::Type mode = SymMode::CBC, const ByteString& IV = ByteString(), bool padding = true, size_t counterBits = 0, const ByteString& aad = ByteString(), size_t tagBytes = 0);
virtual bool decryptUpdate(const ByteString& encryptedData, ByteString& data);
virtual bool decryptFinal(ByteString& data);
// Return the block size
virtual size_t getBlockSize() const = 0;
// Check if more bytes of data can be encrypted
virtual bool checkMaximumBytes(unsigned long bytes);
protected:
// Return the right EVP cipher for the operation
virtual const EVP_CIPHER* getCipher() const = 0;
private:
// The current EVP context
EVP_CIPHER_CTX* pCurCTX;
// The maximum bytes to encrypt/decrypt
BIGNUM* maximumBytes;
BIGNUM* counterBytes;
};
#endif // !_SOFTHSM_V2_OSSLEVPSYMMETRICALGORITHM_H
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