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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/*
* XSEC
*
* TXFMCipher := Class that performs a symmetric encrypt/decrypt transform
*
* $Id$
*
*/
#ifndef TXFMCIPHER_INCLUDE
#define TXFMCIPHER_INCLUDE
// XSEC Includes
#include <xsec/transformers/TXFMBase.hpp>
#include <xsec/enc/XSECCryptoSymmetricKey.hpp>
/**
* \brief Transformer to handle symmetric encryption.
*
* Note that there is no particular XML DSIG/XENC transform associated
* with encryption, but this is a convenient way to handle this process.
* @ingroup internal
*/
class XSEC_EXPORT TXFMCipher : public TXFMBase {
public:
// Constructors and destructors
TXFMCipher(XERCES_CPP_NAMESPACE_QUALIFIER DOMDocument* doc,
const XSECCryptoKey* key,
bool encrypt,
XSECCryptoSymmetricKey::SymmetricKeyMode mode = XSECCryptoSymmetricKey::MODE_CBC,
unsigned int taglen = 0);
virtual ~TXFMCipher();
// Methods to get tranform output type and input requirement
virtual TXFMBase::ioType getInputType(void) const;
virtual TXFMBase::ioType getOutputType(void) const;
virtual nodeType getNodeType(void) const;
// TXFMCipher Unique
void setKey(unsigned char * key, unsigned int keyLen);
// Methods to set input data
virtual void setInput(TXFMBase * newInput);
// Methods to get output data
virtual unsigned int readBytes(XMLByte * const toFill, const unsigned int maxToFill);
private:
TXFMCipher();
bool m_doEncrypt; // Are we in encrypt (or decrypt) mode
unsigned int m_taglen; // Length of Authentication Tag for AEAD ciphers
XSECCryptoKey * mp_cipher; // Crypto implementation
bool m_complete;
unsigned char m_inputBuffer[2050];
unsigned char m_outputBuffer[3072]; // Always keep 2K of data
unsigned int m_remaining; // Amount remaining in output
};
#endif /* TXFMCIPHER_INCLUDE */
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