TXFMCipher.hpp

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/*
 * Copyright 2002-2005 The Apache Software Foundation.
 *
 * Licensed 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: TXFMCipher.hpp,v 1.4 2005/02/03 13:50:12 milan Exp $
 *
 */

#ifndef TXFMCIPHER_INCLUDE
#define TXFMCIPHER_INCLUDE

// XSEC Includes

#include <xsec/transformers/TXFMBase.hpp>
#include <xsec/enc/XSECCryptoSymmetricKey.hpp>
 
class DSIG_EXPORT TXFMCipher : public TXFMBase {

public:

    // Constructors and destructors

    TXFMCipher(XERCES_CPP_NAMESPACE_QUALIFIER DOMDocument *doc, XSECCryptoKey * key, bool encrypt);
    ~TXFMCipher();

    // Methods to get tranform output type and input requirement

    virtual TXFMBase::ioType getInputType(void);
    virtual TXFMBase::ioType getOutputType(void);
    virtual nodeType getNodeType(void);

    // 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);
    virtual XERCES_CPP_NAMESPACE_QUALIFIER DOMDocument *getDocument();
    virtual XERCES_CPP_NAMESPACE_QUALIFIER DOMNode *getFragmentNode();
    virtual const XMLCh * getFragmentId();
    
private:
    TXFMCipher();

    bool                    m_doEncrypt;        // Are we in encrypt (or decrypt) mode
    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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