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Posted to commits@santuario.apache.org by bl...@apache.org on 2003/08/31 14:50:04 UTC
cvs commit: xml-security/c/src/transformers TXFMCipher.cpp TXFMCipher.hpp
blautenb 2003/08/31 05:50:04
Added: c/src/transformers TXFMCipher.cpp TXFMCipher.hpp
Log:
Cipher Transform used for decryption/encryption
Revision Changes Path
1.1 xml-security/c/src/transformers/TXFMCipher.cpp
Index: TXFMCipher.cpp
===================================================================
/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 2002-2003 The Apache Software Foundation. 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.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "<WebSig>" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 2001, Institute for
* Data Communications Systems, <http://www.nue.et-inf.uni-siegen.de/>.
* The development of this software was partly funded by the European
* Commission in the <WebSig> project in the ISIS Programme.
* For more information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
/*
* XSEC
*
* TXFMCipher := Class that performs encryption and decryption transforms
*
* $Id: TXFMCipher.cpp,v 1.1 2003/08/31 12:50:04 blautenb Exp $
*
*/
// XSEC
#include <xsec/framework/XSECDefs.hpp>
#include <xsec/transformers/TXFMCipher.hpp>
#include <xsec/utils/XSECPlatformUtils.hpp>
#include <xsec/framework/XSECException.hpp>
TXFMCipher::TXFMCipher(DOMDocument *doc,
XSECCryptoKey * key,
bool encrypt) :
TXFMBase(doc),
m_doEncrypt(encrypt),
m_remaining(0) {
mp_cipher = key->clone();
if (!mp_cipher) {
throw XSECException(XSECException::CryptoProviderError,
"Error cloning key");
}
m_complete = false;
try {
if (mp_cipher->getKeyType() == XSECCryptoKey::KEY_SYMMETRIC)
(dynamic_cast<XSECCryptoSymmetricKey *>(mp_cipher))->decryptInit();
}
catch (...) {
delete mp_cipher;
mp_cipher = NULL;
throw;
}
};
TXFMCipher::~TXFMCipher() {
if (mp_cipher != NULL)
delete mp_cipher;
};
// Methods to set the inputs
void TXFMCipher::setInput(TXFMBase *newInput) {
input = newInput;
// Set up for comments
keepComments = input->getCommentsStatus();
}
// Methods to get tranform output type and input requirement
TXFMBase::ioType TXFMCipher::getInputType(void) {
return TXFMBase::BYTE_STREAM;
}
TXFMBase::ioType TXFMCipher::getOutputType(void) {
return TXFMBase::BYTE_STREAM;
}
TXFMBase::nodeType TXFMCipher::getNodeType(void) {
return TXFMBase::DOM_NODE_NONE;
}
// Methods to get output data
unsigned int TXFMCipher::readBytes(XMLByte * const toFill, unsigned int maxToFill) {
unsigned int ret, fill, leftToFill;
ret = 0; // How much have we copied?
leftToFill = maxToFill; // Still have to copy in entire thing
while (ret != maxToFill && (m_complete == false || m_remaining > 0)) {
if (m_remaining != 0) {
// Copy anything remaining in the buffer to the output
fill = (leftToFill > m_remaining ? m_remaining : leftToFill);
memcpy(&toFill[ret], m_outputBuffer, fill);
if (fill < m_remaining)
memmove(m_outputBuffer, m_outputBuffer + fill, (m_remaining - fill));
m_remaining -= fill;
ret += fill;
}
// Now do some decrypting
if (m_complete == false) {
unsigned int sz = input->readBytes(m_inputBuffer, 2048);
if (mp_cipher->getKeyType() == XSECCryptoKey::KEY_SYMMETRIC) {
XSECCryptoSymmetricKey * symCipher =
dynamic_cast<XSECCryptoSymmetricKey*>(mp_cipher);
if (sz == 0) {
m_complete = true;
m_remaining = symCipher->decryptFinish(m_outputBuffer, 3072);
}
else
m_remaining = symCipher->decrypt(m_inputBuffer, m_outputBuffer, sz, 3072);
}
}
}
return ret;
}
DOMDocument *TXFMCipher::getDocument() {
return NULL;
}
DOMNode * TXFMCipher::getFragmentNode() {
return NULL; // Return a null node
}
const XMLCh * TXFMCipher::getFragmentId() {
return NULL; // Empty string
}
1.1 xml-security/c/src/transformers/TXFMCipher.hpp
Index: TXFMCipher.hpp
===================================================================
/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 2002-2003 The Apache Software Foundation. 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.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "<WebSig>" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 2001, Institute for
* Data Communications Systems, <http://www.nue.et-inf.uni-siegen.de/>.
* The development of this software was partly funded by the European
* Commission in the <WebSig> project in the ISIS Programme.
* For more information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
/*
* XSEC
*
* TXFMCipher := Class that performs a symmetric encrypt/decrypt transform
*
* $Id: TXFMCipher.hpp,v 1.1 2003/08/31 12:50:04 blautenb Exp $
*
*/
#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 DSIG_EXPORT TXFMCipher : public TXFMBase {
public:
// Constructors and destructors
TXFMCipher(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 DOMDocument *getDocument();
virtual 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 */