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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
*
* DSIGTransformXSL := Class that Handles DSIG XSLT Transforms
*
* $Id: DSIGTransformXSL.cpp 1125514 2011-05-20 19:08:33Z scantor $
*
*/
// XSEC
#include <xsec/dsig/DSIGTransformXSL.hpp>
#include <xsec/dsig/DSIGSignature.hpp>
#include <xsec/transformers/TXFMXSL.hpp>
#include <xsec/transformers/TXFMC14n.hpp>
#include <xsec/transformers/TXFMChain.hpp>
#include <xsec/framework/XSECException.hpp>
#include <xsec/framework/XSECEnv.hpp>
#include <xsec/utils/XSECDOMUtils.hpp>
#include <xsec/framework/XSECError.hpp>
#include <xercesc/dom/DOM.hpp>
#include <xercesc/framework/MemBufFormatTarget.hpp>
#include <xercesc/util/XMLUniDefs.hpp>
#include <xercesc/util/Janitor.hpp>
XERCES_CPP_NAMESPACE_USE
class XSECDomToSafeBuffer {
public:
XSECDomToSafeBuffer(DOMNode *node);
virtual ~XSECDomToSafeBuffer() {}
operator const safeBuffer&() const {
return m_buffer;
}
private:
safeBuffer m_buffer;
};
XSECDomToSafeBuffer::XSECDomToSafeBuffer(DOMNode* node)
{
static const XMLCh _LS[] = {chLatin_L, chLatin_S, chNull};
DOMImplementationLS* impl = DOMImplementationRegistry::getDOMImplementation(_LS);
MemBufFormatTarget* target = new MemBufFormatTarget;
Janitor<MemBufFormatTarget> j_target(target);
#if defined (XSEC_XERCES_DOMLSSERIALIZER)
// DOM L3 version as per Xerces 3.0 API
DOMLSSerializer* theSerializer = impl->createLSSerializer();
Janitor<DOMLSSerializer> j_theSerializer(theSerializer);
DOMLSOutput *theOutput = impl->createLSOutput();
Janitor<DOMLSOutput> j_theOutput(theOutput);
theOutput->setByteStream(target);
#else
DOMWriter* theSerializer = impl->createDOMWriter();
Janitor<DOMWriter> j_theSerializer(theSerializer);
#endif
try
{
#if defined (XSEC_XERCES_DOMLSSERIALIZER)
theSerializer->write(node, theOutput);
#else
theSerializer->writeNode(target, *node);
#endif
m_buffer.sbMemcpyIn(0, target->getRawBuffer(), target->getLen());
}
catch(const XMLException&)
{
throw XSECException(XSECException::UnknownError);
}
catch(const DOMException&)
{
throw XSECException(XSECException::UnknownError);
}
}
// --------------------------------------------------------------------------------
// Constructors and Destructors
// --------------------------------------------------------------------------------
DSIGTransformXSL::DSIGTransformXSL(const XSECEnv * env, DOMNode * node) :
DSIGTransform(env, node),
mp_stylesheetNode(NULL) {};
DSIGTransformXSL::DSIGTransformXSL(const XSECEnv * env) :
DSIGTransform(env),
mp_stylesheetNode(NULL) {};
DSIGTransformXSL::~DSIGTransformXSL() {};
// --------------------------------------------------------------------------------
// Interface Methods
// --------------------------------------------------------------------------------
transformType DSIGTransformXSL::getTransformType() {
return TRANSFORM_XSLT;
}
void DSIGTransformXSL::appendTransformer(TXFMChain * input) {
#ifdef XSEC_NO_XSLT
throw XSECException(XSECException::UnsupportedFunction,
"XSLT Transforms not supported in this compilation of the library");
#else
if (mp_stylesheetNode == 0)
throw XSECException(XSECException::XSLError, "Style Sheet not found for XSL Transform");
TXFMBase * nextInput;
// XSLT Transform - requires a byte stream input
if (input->getLastTxfm()->getOutputType() == TXFMBase::DOM_NODES) {
// Use c14n to translate to BYTES
XSECnew(nextInput, TXFMC14n(mp_txfmNode->getOwnerDocument()));
input->appendTxfm(nextInput);
}
TXFMXSL * x;
// Create the XSLT transform
XSECnew(x, TXFMXSL(mp_txfmNode->getOwnerDocument()));
input->appendTxfm(x);
// Patch to avoid c14n of stylesheet
XSECDomToSafeBuffer sbStyleSheet(mp_stylesheetNode);
x->evaluateStyleSheet(sbStyleSheet);
#endif /* NO_XSLT */
}
DOMElement * DSIGTransformXSL::createBlankTransform(DOMDocument * parentDoc) {
safeBuffer str;
const XMLCh * prefix;
DOMElement *ret;
DOMDocument *doc = mp_env->getParentDocument();
prefix = mp_env->getDSIGNSPrefix();
// Create the transform node
makeQName(str, prefix, "Transform");
ret = doc->createElementNS(DSIGConstants::s_unicodeStrURIDSIG, str.rawXMLChBuffer());
ret->setAttributeNS(NULL,DSIGConstants::s_unicodeStrAlgorithm, DSIGConstants::s_unicodeStrURIXSLT);
mp_txfmNode = ret;
mp_stylesheetNode = NULL;
return ret;
}
void DSIGTransformXSL::load(void) {
// find the style sheet
mp_stylesheetNode = mp_txfmNode->getFirstChild();
while (mp_stylesheetNode != 0 &&
mp_stylesheetNode->getNodeType() != DOMNode::ELEMENT_NODE && !strEquals(mp_stylesheetNode->getNodeName(), "xsl:stylesheet"))
mp_stylesheetNode = mp_stylesheetNode->getNextSibling();
if (mp_stylesheetNode == 0)
throw XSECException(XSECException::XSLError, "Style Sheet not found for XSL Transform");
}
// --------------------------------------------------------------------------------
// XSLT Specific Methods
// --------------------------------------------------------------------------------
DOMNode * DSIGTransformXSL::setStylesheet(DOMNode * stylesheet) {
DOMNode * ret = mp_stylesheetNode;
if (mp_stylesheetNode) {
if (stylesheet)
mp_txfmNode->insertBefore(stylesheet, mp_stylesheetNode);
mp_txfmNode->removeChild(mp_stylesheetNode);
}
else if (stylesheet) {
mp_txfmNode->appendChild(stylesheet);
}
mp_stylesheetNode = stylesheet;
return ret;
}
DOMNode * DSIGTransformXSL::getStylesheet(void) {
return mp_stylesheetNode;
}
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