2 * Copyright 2001-2006 Internet2
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4 * Licensed under the Apache License, Version 2.0 (the "License");
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5 * you may not use this file except in compliance with the License.
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6 * You may obtain a copy of the License at
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8 * http://www.apache.org/licenses/LICENSE-2.0
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10 * Unless required by applicable law or agreed to in writing, software
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11 * distributed under the License is distributed on an "AS IS" BASIS,
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12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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13 * See the License for the specific language governing permissions and
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14 * limitations under the License.
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18 * XMLSecSignatureImpl.cpp
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20 * Signature class for XMLSec-based signature-handling
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23 #include "internal.h"
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24 #include "exceptions.h"
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25 #include "impl/UnknownElement.h"
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26 #include "signature/KeyInfo.h"
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27 #include "signature/Signature.h"
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28 #include "util/NDC.h"
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29 #include "util/XMLConstants.h"
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30 #include "util/XMLHelper.h"
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32 #include <log4cpp/Category.hh>
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33 #include <xercesc/framework/MemBufInputSource.hpp>
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34 #include <xercesc/framework/Wrapper4InputSource.hpp>
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35 #include <xercesc/util/XMLUniDefs.hpp>
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36 #include <xsec/dsig/DSIGKeyInfoX509.hpp>
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37 #include <xsec/dsig/DSIGReference.hpp>
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38 #include <xsec/enc/XSECCryptoException.hpp>
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39 #include <xsec/framework/XSECException.hpp>
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41 using namespace xmlsignature;
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42 using namespace xmltooling;
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43 using namespace log4cpp;
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44 using namespace std;
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46 #if defined (_MSC_VER)
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47 #pragma warning( push )
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48 #pragma warning( disable : 4250 4251 )
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51 namespace xmlsignature {
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53 class XMLTOOL_DLLLOCAL XMLSecSignatureImpl : public UnknownElementImpl, public virtual Signature
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56 XMLSecSignatureImpl() : UnknownElementImpl(XMLConstants::XMLSIG_NS, Signature::LOCAL_NAME, XMLConstants::XMLSIG_PREFIX),
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57 m_signature(NULL), m_c14n(NULL), m_sm(NULL), m_key(NULL), m_keyInfo(NULL), m_reference(NULL) {}
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58 virtual ~XMLSecSignatureImpl();
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60 void releaseDOM() const;
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61 void releaseChildrenDOM(bool propagateRelease=true) const {
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63 m_keyInfo->releaseDOM();
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64 if (propagateRelease)
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65 m_keyInfo->releaseChildrenDOM();
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68 XMLObject* clone() const;
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69 Signature* cloneSignature() const;
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71 DOMElement* marshall(DOMDocument* document=NULL, const vector<Signature*>* sigs=NULL) const;
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72 DOMElement* marshall(DOMElement* parentElement, const vector<Signature*>* sigs=NULL) const;
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73 XMLObject* unmarshall(DOMElement* element, bool bindDocument=false);
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76 const XMLCh* getCanonicalizationMethod() const { return m_c14n ? m_c14n : DSIGConstants::s_unicodeStrURIEXC_C14N_NOC; }
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77 const XMLCh* getSignatureAlgorithm() const { return m_sm ? m_sm : DSIGConstants::s_unicodeStrURIRSA_SHA1; }
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78 KeyInfo* getKeyInfo() const { return m_keyInfo; }
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79 ContentReference* getContentReference() const { return m_reference; }
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80 DSIGSignature* getXMLSignature() const { return m_signature; }
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83 void setCanonicalizationMethod(const XMLCh* c14n) { m_c14n = prepareForAssignment(m_c14n,c14n); }
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84 void setSignatureAlgorithm(const XMLCh* sm) { m_sm = prepareForAssignment(m_sm,sm); }
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85 void setSigningKey(XSECCryptoKey* signingKey) {
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89 void setKeyInfo(KeyInfo* keyInfo) {
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90 prepareForAssignment(m_keyInfo, keyInfo);
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93 void setContentReference(ContentReference* reference) {
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95 m_reference=reference;
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101 mutable DSIGSignature* m_signature;
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104 XSECCryptoKey* m_key;
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105 KeyInfo* m_keyInfo;
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106 ContentReference* m_reference;
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111 #if defined (_MSC_VER)
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112 #pragma warning( pop )
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115 XMLSecSignatureImpl::~XMLSecSignatureImpl()
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117 // Release the associated signature.
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119 XMLToolingInternalConfig::getInternalConfig().m_xsecProvider->releaseSignature(m_signature);
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121 XMLString::release(&m_c14n);
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122 XMLString::release(&m_sm);
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125 delete m_reference;
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128 void XMLSecSignatureImpl::releaseDOM() const
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131 // This should save off the DOM
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132 UnknownElementImpl::releaseDOM();
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134 // Release the associated signature.
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136 XMLToolingInternalConfig::getInternalConfig().m_xsecProvider->releaseSignature(m_signature);
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142 XMLObject* XMLSecSignatureImpl::clone() const
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144 return cloneSignature();
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147 Signature* XMLSecSignatureImpl::cloneSignature() const
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149 XMLSecSignatureImpl* ret=new XMLSecSignatureImpl();
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151 ret->m_c14n=XMLString::replicate(m_c14n);
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152 ret->m_sm=XMLString::replicate(m_sm);
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154 ret->m_key=m_key->clone();
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156 ret->m_keyInfo=m_keyInfo->cloneKeyInfo();
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158 // If there's no XML locally, serialize this object into the new one, otherwise just copy it over.
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160 serialize(ret->m_xml);
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167 void XMLSecSignatureImpl::sign()
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169 Category& log=Category::getInstance(XMLTOOLING_LOGCAT".Signature");
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170 log.debug("applying signature");
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173 throw SignatureException("Only a marshalled Signature object can be signed.");
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175 throw SignatureException("No signing key available for signature creation.");
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176 else if (!m_reference)
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177 throw SignatureException("No ContentReference object set for signature creation.");
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180 log.debug("creating signature reference(s)");
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181 DSIGReferenceList* refs = m_signature->getReferenceList();
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182 while (refs && refs->getSize())
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183 delete refs->removeReference(0);
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184 m_reference->createReferences(m_signature);
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186 log.debug("computing signature");
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187 m_signature->setSigningKey(m_key->clone());
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188 m_signature->sign();
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190 catch(XSECException& e) {
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191 auto_ptr_char temp(e.getMsg());
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192 throw SignatureException(string("Caught an XMLSecurity exception while signing: ") + temp.get());
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194 catch(XSECCryptoException& e) {
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195 throw SignatureException(string("Caught an XMLSecurity exception while signing: ") + e.getMsg());
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199 DOMElement* XMLSecSignatureImpl::marshall(DOMDocument* document, const vector<Signature*>* sigs) const
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202 xmltooling::NDC ndc("marshall");
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205 Category& log=Category::getInstance(XMLTOOLING_LOGCAT".Signature");
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206 log.debug("marshalling ds:Signature");
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208 DOMElement* cachedDOM=getDOM();
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210 if (!document || document==cachedDOM->getOwnerDocument()) {
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211 log.debug("Signature has a usable cached DOM, reusing it");
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213 setDocumentElement(cachedDOM->getOwnerDocument(),cachedDOM);
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214 releaseParentDOM(true);
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218 // We have a DOM but it doesn't match the document we were given. This both sucks and blows.
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219 // Without an adoptNode option to maintain the child pointers, we have to either import the
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220 // DOM while somehow reassigning all the nested references (which amounts to a complete
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221 // *unmarshall* operation), or we just release the existing DOM and hope that we can get
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222 // it back. This depends on all objects being able to preserve their DOM at all costs.
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223 releaseChildrenDOM(true);
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227 // If we get here, we didn't have a usable DOM.
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228 bool bindDocument=false;
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229 if (m_xml.empty()) {
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230 // Fresh signature, so we just create an empty one.
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231 log.debug("creating empty Signature element");
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233 document=DOMImplementationRegistry::getDOMImplementation(NULL)->createDocument();
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236 m_signature=XMLToolingInternalConfig::getInternalConfig().m_xsecProvider->newSignature();
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237 m_signature->setDSIGNSPrefix(XMLConstants::XMLSIG_PREFIX);
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238 cachedDOM=m_signature->createBlankSignature(document, getCanonicalizationMethod(), getSignatureAlgorithm());
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241 // We need to reparse the XML we saved off into a new DOM.
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242 MemBufInputSource src(reinterpret_cast<const XMLByte*>(m_xml.c_str()),m_xml.length(),"XMLSecSignatureImpl");
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243 Wrapper4InputSource dsrc(&src,false);
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244 log.debug("parsing Signature XML back into DOM tree");
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245 DOMDocument* internalDoc=XMLToolingConfig::getConfig().getParser().parse(dsrc);
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247 // The caller insists on using his own document, so we now have to import the thing
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248 // into it. Then we're just dumping the one we built.
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249 log.debug("reimporting new DOM into caller-supplied document");
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250 cachedDOM=static_cast<DOMElement*>(document->importNode(internalDoc->getDocumentElement(), true));
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251 internalDoc->release();
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254 // We just bind the document we built to the object as the result.
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255 cachedDOM=static_cast<DOMElement*>(internalDoc->getDocumentElement());
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256 document=internalDoc;
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260 // Now reload the signature from the DOM.
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262 m_signature=XMLToolingInternalConfig::getInternalConfig().m_xsecProvider->newSignatureFromDOM(
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263 document, cachedDOM
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265 m_signature->load();
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267 catch(XSECException& e) {
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269 document->release();
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270 auto_ptr_char temp(e.getMsg());
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271 throw MarshallingException(string("Caught an XMLSecurity exception while loading signature: ") + temp.get());
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273 catch(XSECCryptoException& e) {
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275 document->release();
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276 throw MarshallingException(string("Caught an XMLSecurity exception while loading signature: ") + e.getMsg());
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280 // Marshall KeyInfo data.
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281 if (m_keyInfo && (!m_signature->getKeyInfoList() || m_signature->getKeyInfoList()->isEmpty())) {
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282 m_keyInfo->marshall(cachedDOM);
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285 // Recache the DOM and clear the serialized copy.
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286 setDocumentElement(document, cachedDOM);
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287 log.debug("caching DOM for Signature (document is %sbound)", bindDocument ? "" : "not ");
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288 setDOM(cachedDOM, bindDocument);
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289 releaseParentDOM(true);
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294 DOMElement* XMLSecSignatureImpl::marshall(DOMElement* parentElement, const vector<Signature*>* sigs) const
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297 xmltooling::NDC ndc("marshall");
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300 Category& log=Category::getInstance(XMLTOOLING_LOGCAT".Signature");
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301 log.debug("marshalling ds:Signature");
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303 DOMElement* cachedDOM=getDOM();
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305 if (parentElement->getOwnerDocument()==cachedDOM->getOwnerDocument()) {
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306 log.debug("Signature has a usable cached DOM, reusing it");
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307 if (parentElement!=cachedDOM->getParentNode()) {
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308 parentElement->appendChild(cachedDOM);
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309 releaseParentDOM(true);
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314 // We have a DOM but it doesn't match the document we were given. This both sucks and blows.
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315 // Without an adoptNode option to maintain the child pointers, we have to either import the
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316 // DOM while somehow reassigning all the nested references (which amounts to a complete
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317 // *unmarshall* operation), or we just release the existing DOM and hope that we can get
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318 // it back. This depends on all objects being able to preserve their DOM at all costs.
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319 releaseChildrenDOM(true);
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323 // If we get here, we didn't have a usable DOM.
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324 if (m_xml.empty()) {
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325 // Fresh signature, so we just create an empty one.
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326 log.debug("creating empty Signature element");
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327 m_signature=XMLToolingInternalConfig::getInternalConfig().m_xsecProvider->newSignature();
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328 m_signature->setDSIGNSPrefix(XMLConstants::XMLSIG_PREFIX);
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329 cachedDOM=m_signature->createBlankSignature(
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330 parentElement->getOwnerDocument(), getCanonicalizationMethod(), getSignatureAlgorithm()
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334 MemBufInputSource src(reinterpret_cast<const XMLByte*>(m_xml.c_str()),m_xml.length(),"XMLSecSignatureImpl");
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335 Wrapper4InputSource dsrc(&src,false);
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336 log.debug("parsing XML back into DOM tree");
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337 DOMDocument* internalDoc=XMLToolingConfig::getConfig().getParser().parse(dsrc);
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339 log.debug("reimporting new DOM into caller-supplied document");
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340 cachedDOM=static_cast<DOMElement*>(parentElement->getOwnerDocument()->importNode(internalDoc->getDocumentElement(),true));
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341 internalDoc->release();
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343 // Now reload the signature from the DOM.
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345 m_signature=XMLToolingInternalConfig::getInternalConfig().m_xsecProvider->newSignatureFromDOM(
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346 parentElement->getOwnerDocument(), cachedDOM
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348 m_signature->load();
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350 catch(XSECException& e) {
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351 auto_ptr_char temp(e.getMsg());
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352 throw MarshallingException(string("Caught an XMLSecurity exception while loading signature: ") + temp.get());
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354 catch(XSECCryptoException& e) {
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355 throw MarshallingException(string("Caught an XMLSecurity exception while loading signature: ") + e.getMsg());
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359 // Marshall KeyInfo data.
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360 if (m_keyInfo && (!m_signature->getKeyInfoList() || m_signature->getKeyInfoList()->isEmpty())) {
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361 m_keyInfo->marshall(cachedDOM);
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364 // Recache the DOM and clear the serialized copy.
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365 parentElement->appendChild(cachedDOM);
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366 log.debug("caching DOM for Signature");
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367 setDOM(cachedDOM, false);
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368 releaseParentDOM(true);
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373 XMLObject* XMLSecSignatureImpl::unmarshall(DOMElement* element, bool bindDocument)
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375 Category::getInstance(XMLTOOLING_LOGCAT".Signature").debug("unmarshalling ds:Signature");
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378 m_signature=XMLToolingInternalConfig::getInternalConfig().m_xsecProvider->newSignatureFromDOM(
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379 element->getOwnerDocument(), element
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381 m_signature->load();
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383 catch(XSECException& e) {
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384 auto_ptr_char temp(e.getMsg());
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385 throw UnmarshallingException(string("Caught an XMLSecurity exception while loading signature: ") + temp.get());
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387 catch(XSECCryptoException& e) {
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388 throw UnmarshallingException(string("Caught an XMLSecurity exception while loading signature: ") + e.getMsg());
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391 setDOM(element, bindDocument);
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395 Signature* SignatureBuilder::buildObject(
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396 const XMLCh* nsURI, const XMLCh* localName, const XMLCh* prefix, const QName* schemaType
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399 if (!XMLString::equals(nsURI,XMLConstants::XMLSIG_NS) || !XMLString::equals(localName,Signature::LOCAL_NAME))
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400 throw XMLObjectException("XMLSecSignatureBuilder requires standard Signature element name.");
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401 return buildObject();
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404 Signature* SignatureBuilder::buildObject() const
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406 return new XMLSecSignatureImpl();
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409 const XMLCh Signature::LOCAL_NAME[] = UNICODE_LITERAL_9(S,i,g,n,a,t,u,r,e);
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