2 * Copyright 2001-2005 Internet2
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
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11 * distributed under the License is distributed on an "AS IS" BASIS,
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13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 /* XMLAAP.cpp - XML AAP implementation
27 #include <log4cpp/Category.hh>
30 using namespace shibboleth;
31 using namespace log4cpp;
34 #include <xercesc/util/regx/RegularExpression.hpp>
38 class XMLAAPImpl : public ReloadableXMLFileImpl
41 XMLAAPImpl(const char* pathname) : ReloadableXMLFileImpl(pathname), anyAttribute(false) { init(); }
42 XMLAAPImpl(const DOMElement* e) : ReloadableXMLFileImpl(e), anyAttribute(false) { init(); }
46 class AttributeRule : public IAttributeRule
49 AttributeRule(const DOMElement* e);
52 const XMLCh* getName() const { return m_name; }
53 const XMLCh* getNamespace() const { return m_namespace; }
54 const char* getAlias() const { return m_alias.get(); }
55 const char* getHeader() const { return m_header.get(); }
56 bool getCaseSensitive() const { return m_caseSensitive; }
57 bool getScoped() const { return m_scoped; }
58 void apply(SAMLAttribute& attribute, const IEntityDescriptor* source=NULL) const;
60 enum value_type { literal, regexp, xpath };
63 const XMLCh* m_namespace;
64 auto_ptr_char m_alias;
65 auto_ptr_char m_header;
71 SiteRule() : anyValue(false) {}
73 vector<pair<value_type,const XMLCh*> > valueDenials;
74 vector<pair<value_type,const XMLCh*> > valueAccepts;
75 vector<pair<value_type,const XMLCh*> > scopeDenials;
76 vector<pair<value_type,const XMLCh*> > scopeAccepts;
79 value_type toValueType(const DOMElement* e);
82 const IExtendedEntityDescriptor* source,
83 const vector<const SiteRule*>& ruleStack
85 bool accept(const DOMElement* e, const IExtendedEntityDescriptor* source=NULL) const;
87 SiteRule m_anySiteRule;
89 typedef map<xstring,SiteRule> sitemap_t;
91 typedef map<string,SiteRule> sitemap_t;
97 vector<const IAttributeRule*> m_attrs;
98 map<string,const IAttributeRule*> m_aliasMap;
100 typedef map<xstring,AttributeRule*> attrmap_t;
102 typedef map<string,AttributeRule*> attrmap_t;
107 class XMLAAP : public IAAP, public ReloadableXMLFile
110 XMLAAP(const DOMElement* e) : ReloadableXMLFile(e) {}
113 bool anyAttribute() const {return static_cast<XMLAAPImpl*>(getImplementation())->anyAttribute;}
114 const IAttributeRule* lookup(const XMLCh* attrName, const XMLCh* attrNamespace=NULL) const;
115 const IAttributeRule* lookup(const char* alias) const;
116 Iterator<const IAttributeRule*> getAttributeRules() const;
119 virtual ReloadableXMLFileImpl* newImplementation(const char* pathname, bool first=true) const;
120 virtual ReloadableXMLFileImpl* newImplementation(const DOMElement* e, bool first=true) const;
125 IPlugIn* XMLAAPFactory(const DOMElement* e)
127 auto_ptr<XMLAAP> aap(new XMLAAP(e));
128 aap->getImplementation();
129 return aap.release();
132 ReloadableXMLFileImpl* XMLAAP::newImplementation(const DOMElement* e, bool first) const
134 return new XMLAAPImpl(e);
137 ReloadableXMLFileImpl* XMLAAP::newImplementation(const char* pathname, bool first) const
139 return new XMLAAPImpl(pathname);
142 void XMLAAPImpl::init()
145 saml::NDC ndc("init");
147 Category& log=Category::getInstance(XMLPROVIDERS_LOGCAT".AAP");
151 if (!saml::XML::isElementNamed(m_root,::XML::SHIB_NS,SHIB_L(AttributeAcceptancePolicy)))
153 log.error("Construction requires a valid AAP file: (shib:AttributeAcceptancePolicy as root element)");
154 throw MalformedException("Construction requires a valid AAP file: (shib:AttributeAcceptancePolicy as root element)");
157 // Check for AnyAttribute element.
158 DOMElement* anyAttr = saml::XML::getFirstChildElement(m_root,::XML::SHIB_NS,SHIB_L(AnyAttribute));
161 log.warn("<AnyAttribute> found, will short-circuit all attribute value and scope filtering");
164 // Loop over the AttributeRule elements.
165 DOMNodeList* nlist = m_root->getElementsByTagNameNS(::XML::SHIB_NS,SHIB_L(AttributeRule));
166 for (unsigned int i=0; nlist && i<nlist->getLength(); i++)
168 AttributeRule* rule=new AttributeRule(static_cast<DOMElement*>(nlist->item(i)));
170 xstring key=rule->getName();
171 key=key + chBang + chBang + (rule->getNamespace() ? rule->getNamespace() : Constants::SHIB_ATTRIBUTE_NAMESPACE_URI);
173 auto_ptr_char aname(rule->getName());
174 string key(aname.get());
176 if (rule->getNamespace())
178 auto_ptr_char ans(rule->getNamespace());
182 key+="urn:mace:shibboleth:1.0:attributeNamespace:uri";
185 m_attrs.push_back(rule);
186 if (rule->getAlias())
187 m_aliasMap[rule->getAlias()]=rule;
190 catch (SAMLException& e)
192 log.errorStream() << "Error while parsing AAP: " << e.what() << CategoryStream::ENDLINE;
199 log.error("Unexpected error while parsing AAP");
206 XMLAAPImpl::~XMLAAPImpl()
209 for_each(m_attrMap.begin(),m_attrMap.end(),shibtarget::cleanup_pair<xstring,AttributeRule>());
211 for_each(m_attrMap.begin(),m_attrMap.end(),shibtarget::cleanup_pair<string,AttributeRule>());
215 XMLAAPImpl::AttributeRule::AttributeRule(const DOMElement* e) :
216 m_alias(e->hasAttributeNS(NULL,SHIB_L(Alias)) ? e->getAttributeNS(NULL,SHIB_L(Alias)) : NULL),
217 m_header(e->hasAttributeNS(NULL,SHIB_L(Header)) ? e->getAttributeNS(NULL,SHIB_L(Header)) : NULL),
221 m_name=e->getAttributeNS(NULL,SHIB_L(Name));
222 m_namespace=e->getAttributeNS(NULL,SHIB_L(Namespace));
223 if (!m_namespace || !*m_namespace)
224 m_namespace=Constants::SHIB_ATTRIBUTE_NAMESPACE_URI;
226 const XMLCh* caseSensitive=e->getAttributeNS(NULL,SHIB_L(CaseSensitive));
227 m_caseSensitive=(!caseSensitive || !*caseSensitive || *caseSensitive==chDigit_1 || *caseSensitive==chLatin_t);
229 const XMLCh* scoped=e->getAttributeNS(NULL,SHIB_L(Scoped));
230 m_scoped=(scoped && (*scoped==chDigit_1 || *scoped==chLatin_t));
232 // Check for an AnySite rule.
233 DOMElement* anysite = saml::XML::getFirstChildElement(e);
234 if (anysite && saml::XML::isElementNamed(static_cast<DOMElement*>(anysite),::XML::SHIB_NS,SHIB_L(AnySite)))
236 // Process Scope elements.
237 DOMNodeList* vlist = static_cast<DOMElement*>(anysite)->getElementsByTagNameNS(::XML::SHIB_NS,SHIB_L(Scope));
238 for (unsigned int i=0; vlist && i<vlist->getLength(); i++)
241 DOMElement* se=static_cast<DOMElement*>(vlist->item(i));
242 DOMNode* valnode=se->getFirstChild();
243 if (valnode && valnode->getNodeType()==DOMNode::TEXT_NODE)
245 const XMLCh* accept=se->getAttributeNS(NULL,SHIB_L(Accept));
246 if (!accept || !*accept || *accept==chDigit_1 || *accept==chLatin_t)
247 m_anySiteRule.scopeAccepts.push_back(pair<value_type,const XMLCh*>(toValueType(se),valnode->getNodeValue()));
249 m_anySiteRule.scopeDenials.push_back(pair<value_type,const XMLCh*>(toValueType(se),valnode->getNodeValue()));
253 // Check for an AnyValue rule.
254 vlist = static_cast<DOMElement*>(anysite)->getElementsByTagNameNS(::XML::SHIB_NS,SHIB_L(AnyValue));
255 if (vlist && vlist->getLength())
257 m_anySiteRule.anyValue=true;
261 // Process each Value element.
262 vlist = static_cast<DOMElement*>(anysite)->getElementsByTagNameNS(::XML::SHIB_NS,SHIB_L(Value));
263 for (unsigned int j=0; vlist && j<vlist->getLength(); j++)
265 DOMElement* ve=static_cast<DOMElement*>(vlist->item(j));
266 DOMNode* valnode=ve->getFirstChild();
267 if (valnode && valnode->getNodeType()==DOMNode::TEXT_NODE) {
268 const XMLCh* accept=ve->getAttributeNS(NULL,SHIB_L(Accept));
269 if (!accept || !*accept || *accept==chDigit_1 || *accept==chLatin_t)
270 m_anySiteRule.valueAccepts.push_back(pair<value_type,const XMLCh*>(toValueType(ve),valnode->getNodeValue()));
272 m_anySiteRule.valueDenials.push_back(pair<value_type,const XMLCh*>(toValueType(ve),valnode->getNodeValue()));
278 // Loop over the SiteRule elements.
279 DOMNodeList* slist = e->getElementsByTagNameNS(::XML::SHIB_NS,SHIB_L(SiteRule));
280 for (unsigned int k=0; slist && k<slist->getLength(); k++)
282 const XMLCh* srulename=static_cast<DOMElement*>(slist->item(k))->getAttributeNS(NULL,SHIB_L(Name));
284 m_siteMap[srulename]=SiteRule();
285 SiteRule& srule=m_siteMap[srulename];
287 auto_ptr_char srulename2(srulename);
288 m_siteMap[srulename2.get()]=SiteRule();
289 SiteRule& srule=m_siteMap[srulename2.get()];
292 // Process Scope elements.
293 DOMNodeList* vlist = static_cast<DOMElement*>(slist->item(k))->getElementsByTagNameNS(::XML::SHIB_NS,SHIB_L(Scope));
294 for (unsigned int i=0; vlist && i<vlist->getLength(); i++)
297 DOMElement* se=static_cast<DOMElement*>(vlist->item(i));
298 DOMNode* valnode=se->getFirstChild();
299 if (valnode && valnode->getNodeType()==DOMNode::TEXT_NODE)
301 const XMLCh* accept=se->getAttributeNS(NULL,SHIB_L(Accept));
302 if (!accept || !*accept || *accept==chDigit_1 || *accept==chLatin_t)
303 srule.scopeAccepts.push_back(pair<value_type,const XMLCh*>(toValueType(se),valnode->getNodeValue()));
305 srule.scopeDenials.push_back(pair<value_type,const XMLCh*>(toValueType(se),valnode->getNodeValue()));
309 // Check for an AnyValue rule.
310 vlist = static_cast<DOMElement*>(slist->item(k))->getElementsByTagNameNS(::XML::SHIB_NS,SHIB_L(AnyValue));
311 if (vlist && vlist->getLength())
317 // Process each Value element.
318 vlist = static_cast<DOMElement*>(slist->item(k))->getElementsByTagNameNS(::XML::SHIB_NS,SHIB_L(Value));
319 for (unsigned int j=0; vlist && j<vlist->getLength(); j++)
321 DOMElement* ve=static_cast<DOMElement*>(vlist->item(j));
322 DOMNode* valnode=ve->getFirstChild();
323 if (valnode && valnode->getNodeType()==DOMNode::TEXT_NODE) {
324 const XMLCh* accept=ve->getAttributeNS(NULL,SHIB_L(Accept));
325 if (!accept || !*accept || *accept==chDigit_1 || *accept==chLatin_t)
326 srule.valueAccepts.push_back(pair<value_type,const XMLCh*>(toValueType(ve),valnode->getNodeValue()));
328 srule.valueDenials.push_back(pair<value_type,const XMLCh*>(toValueType(ve),valnode->getNodeValue()));
335 XMLAAPImpl::AttributeRule::value_type XMLAAPImpl::AttributeRule::toValueType(const DOMElement* e)
337 if (!XMLString::compareString(SHIB_L(literal),e->getAttributeNS(NULL,SHIB_L(Type))))
339 else if (!XMLString::compareString(SHIB_L(regexp),e->getAttributeNS(NULL,SHIB_L(Type))))
341 else if (!XMLString::compareString(SHIB_L(xpath),e->getAttributeNS(NULL,SHIB_L(Type))))
343 throw MalformedException("Found an invalid value or scope rule type.");
346 const IAttributeRule* XMLAAP::lookup(const XMLCh* attrName, const XMLCh* attrNamespace) const
349 xstring key=attrName;
350 key=key + chBang + chBang + (attrNamespace ? attrNamespace : Constants::SHIB_ATTRIBUTE_NAMESPACE_URI);
352 auto_ptr_char aname(attrName);
353 string key=aname.get();
357 auto_ptr_char ans(attrNamespace);
361 key+="urn:mace:shibboleth:1.0:attributeNamespace:uri";
363 XMLAAPImpl* impl=dynamic_cast<XMLAAPImpl*>(getImplementation());
364 XMLAAPImpl::attrmap_t::const_iterator i=impl->m_attrMap.find(key);
365 return (i==impl->m_attrMap.end()) ? NULL : i->second;
368 const IAttributeRule* XMLAAP::lookup(const char* alias) const
370 XMLAAPImpl* impl=dynamic_cast<XMLAAPImpl*>(getImplementation());
371 map<string,const IAttributeRule*>::const_iterator i=impl->m_aliasMap.find(alias);
372 return (i==impl->m_aliasMap.end()) ? NULL : i->second;
375 Iterator<const IAttributeRule*> XMLAAP::getAttributeRules() const
377 return dynamic_cast<XMLAAPImpl*>(getImplementation())->m_attrs;
381 bool match(const XMLCh* exp, const XMLCh* test)
385 RegularExpression re(exp);
386 if (re.matches(test))
389 catch (XMLException& ex)
391 auto_ptr<char> tmp(XMLString::transcode(ex.getMessage()));
392 Category::getInstance(XMLPROVIDERS_LOGCAT".XMLAAPImpl").errorStream()
393 << "caught exception while parsing regular expression: " << tmp.get() << CategoryStream::ENDLINE;
399 bool XMLAAPImpl::AttributeRule::scopeCheck(
401 const IExtendedEntityDescriptor* source,
402 const vector<const SiteRule*>& ruleStack
406 saml::NDC ndc("scopeCheck");
408 Category& log=Category::getInstance(XMLPROVIDERS_LOGCAT".AAP");
411 const XMLCh* scope=e->getAttributeNS(NULL,SHIB_L(Scope));
412 if (!scope || !*scope) {
413 // Are we allowed to be unscoped?
414 if (m_scoped && log.isWarnEnabled()) {
415 auto_ptr_char temp(m_name);
416 log.warn("attribute (%s) is scoped, no scope supplied, rejecting it",temp.get());
421 // With the new algorithm, we evaluate each matching rule in sequence, separately.
422 for (vector<const SiteRule*>::const_iterator rule=ruleStack.begin(); rule!=ruleStack.end(); rule++) {
424 // Now run any denials.
425 vector<pair<value_type,const XMLCh*> >::const_iterator i;
426 for (i=(*rule)->scopeDenials.begin(); i!=(*rule)->scopeDenials.end(); i++) {
427 if ((i->first==literal && !XMLString::compareString(i->second,scope)) ||
428 (i->first==regexp && match(i->second,scope))) {
429 if (log.isWarnEnabled()) {
430 auto_ptr_char temp(m_name);
431 auto_ptr_char temp2(scope);
432 log.warn("attribute (%s) scope (%s) denied by site rule, rejecting it",temp.get(),temp2.get());
436 else if (i->first==xpath)
437 log.warn("scope checking does not permit XPath rules");
440 // Now run any accepts.
441 for (i=(*rule)->scopeAccepts.begin(); i!=(*rule)->scopeAccepts.end(); i++) {
442 if ((i->first==literal && !XMLString::compareString(i->second,scope)) ||
443 (i->first==regexp && match(i->second,scope))) {
444 log.debug("matching site rule, scope match");
447 else if (i->first==xpath)
448 log.warn("scope checking does not permit XPath rules");
452 // If we still can't decide, defer to metadata.
454 Iterator<pair<const XMLCh*,bool> > domains=source->getScopes();
455 while (domains.hasNext()) {
456 const pair<const XMLCh*,bool>& p=domains.next();
457 if ((p.second && match(p.first,scope)) || !XMLString::compareString(p.first,scope)) {
458 log.debug("scope match via site metadata");
464 if (log.isWarnEnabled()) {
465 auto_ptr_char temp(m_name);
466 auto_ptr_char temp2(scope);
467 log.warn("attribute (%s) scope (%s) not accepted",temp.get(),temp2.get());
472 bool XMLAAPImpl::AttributeRule::accept(const DOMElement* e, const IExtendedEntityDescriptor* source) const
475 saml::NDC ndc("accept");
477 Category& log=Category::getInstance(XMLPROVIDERS_LOGCAT".AAP");
479 if (log.isDebugEnabled()) {
480 auto_ptr_char temp(m_name);
481 auto_ptr_char temp2(source ? source->getId() : NULL);
482 log.debug("evaluating value for attribute (%s) from site (%s)",temp.get(),temp2.get() ? temp2.get() : "<unspecified>");
485 // This is a complete revamp. The "any" cases become a degenerate case, the "least-specific" matching rule.
486 // The first step is to build a list of matching rules, most-specific to least-specific.
488 vector<const SiteRule*> ruleStack;
490 // Primary match is against entityID.
492 const XMLCh* os=source->getId();
494 auto_ptr_char pos(source->getId());
495 const char* os=pos.get();
497 sitemap_t::const_iterator srule=m_siteMap.find(os);
498 if (srule!=m_siteMap.end())
499 ruleStack.push_back(&srule->second);
501 // Secondary matches are on groups.
502 const IEntitiesDescriptor* group=source->getEntitiesDescriptor();
504 if (group->getName()) {
508 auto_ptr_char gname(group->getName());
509 const char* os=gname.get();
511 srule=m_siteMap.find(os);
512 if (srule!=m_siteMap.end())
513 ruleStack.push_back(&srule->second);
515 group = group->getEntitiesDescriptor();
518 // Tertiary match is the AnySite rule.
519 ruleStack.push_back(&m_anySiteRule);
521 // Still don't support complex content models...
522 DOMNode* n=e->getFirstChild();
523 bool bSimple=(n && n->getNodeType()==DOMNode::TEXT_NODE);
525 // With the new algorithm, we evaluate each matching rule in sequence, separately.
526 for (vector<const SiteRule*>::const_iterator rule=ruleStack.begin(); rule!=ruleStack.end(); rule++) {
528 // Check for shortcut AnyValue blanket rule.
529 if ((*rule)->anyValue) {
530 log.debug("matching site rule, any value match");
531 return scopeCheck(e,source,ruleStack);
534 // Now run any denials.
535 vector<pair<value_type,const XMLCh*> >::const_iterator i;
536 for (i=(*rule)->valueDenials.begin(); bSimple && i!=(*rule)->valueDenials.end(); i++) {
539 if ((m_caseSensitive && !XMLString::compareString(i->second,n->getNodeValue())) ||
540 (!m_caseSensitive && !XMLString::compareIString(i->second,n->getNodeValue()))) {
541 if (log.isWarnEnabled()) {
542 auto_ptr_char temp(m_name);
543 log.warn("attribute (%s) value explicitly denied by site rule, rejecting it",temp.get());
550 if (match(i->second,n->getNodeValue())) {
551 if (log.isWarnEnabled()) {
552 auto_ptr_char temp(m_name);
553 log.warn("attribute (%s) value explicitly denied by site rule, rejecting it",temp.get());
560 log.warn("implementation does not support XPath value rules");
565 // Now run any accepts.
566 for (i=(*rule)->valueAccepts.begin(); bSimple && i!=(*rule)->valueAccepts.end(); i++) {
569 if ((m_caseSensitive && !XMLString::compareString(i->second,n->getNodeValue())) ||
570 (!m_caseSensitive && !XMLString::compareIString(i->second,n->getNodeValue()))) {
571 log.debug("site rule, value match");
572 return scopeCheck(e,source,ruleStack);
577 if (match(i->second,n->getNodeValue())) {
578 log.debug("site rule, value match");
579 return scopeCheck(e,source,ruleStack);
584 log.warn("implementation does not support XPath value rules");
590 if (log.isWarnEnabled()) {
591 auto_ptr_char temp(m_name);
592 auto_ptr_char temp2(n->getNodeValue());
593 log.warn("%sattribute (%s) value (%s) could not be validated by policy, rejecting it",
594 (bSimple ? "" : "complex "),temp.get(),temp2.get());
599 void XMLAAPImpl::AttributeRule::apply(SAMLAttribute& attribute, const IEntityDescriptor* source) const
602 DOMNodeList* vals=attribute.getValueElements();
604 for (unsigned int i=0; vals && i < vals->getLength(); i++) {
605 if (!accept(static_cast<DOMElement*>(vals->item(i)),source ? dynamic_cast<const IExtendedEntityDescriptor*>(source) : NULL))
606 attribute.removeValue(i2);
611 // Now see if we trashed it irrevocably.
612 attribute.checkValidity();