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22 * XMLSecurityPolicyProvider.cpp
24 * XML-based security policy provider.
28 #include "exceptions.h"
29 #include "Application.h"
30 #include "security/SecurityPolicy.h"
31 #include "security/SecurityPolicyProvider.h"
32 #include "util/DOMPropertySet.h"
33 #include "util/SPConstants.h"
36 #include <boost/shared_ptr.hpp>
37 #include <saml/SAMLConfig.h>
38 #include <saml/binding/SecurityPolicyRule.h>
39 #include <xmltooling/io/HTTPResponse.h>
40 #include <xmltooling/util/NDC.h>
41 #include <xmltooling/util/ReloadableXMLFile.h>
42 #include <xmltooling/util/Threads.h>
43 #include <xmltooling/util/XMLHelper.h>
44 #include <xercesc/util/XMLStringTokenizer.hpp>
45 #include <xercesc/util/XMLUniDefs.hpp>
47 using shibspconstants::SHIB2SPCONFIG_NS;
48 using opensaml::SAMLConfig;
49 using opensaml::SecurityPolicyRule;
50 using namespace shibsp;
51 using namespace xmltooling;
52 using namespace boost;
57 #if defined (_MSC_VER)
58 #pragma warning( push )
59 #pragma warning( disable : 4250 )
62 class SHIBSP_DLLLOCAL XMLSecurityPolicyProviderImpl
65 XMLSecurityPolicyProviderImpl(const DOMElement* e, Category& log);
66 ~XMLSecurityPolicyProviderImpl() {
68 m_document->release();
71 void setDocument(DOMDocument* doc) {
76 DOMDocument* m_document;
77 vector<xstring> m_whitelist,m_blacklist;
78 vector< boost::shared_ptr<SecurityPolicyRule> > m_ruleJanitor; // need this to maintain vector type in API
79 typedef map< string,pair< boost::shared_ptr<PropertySet>,vector<const SecurityPolicyRule*> > > policymap_t;
80 policymap_t m_policyMap;
81 policymap_t::const_iterator m_defaultPolicy;
83 friend class SHIBSP_DLLLOCAL XMLSecurityPolicyProvider;
86 class XMLSecurityPolicyProvider : public SecurityPolicyProvider, public ReloadableXMLFile
89 XMLSecurityPolicyProvider(const DOMElement* e)
90 : ReloadableXMLFile(e, Category::getInstance(SHIBSP_LOGCAT".SecurityPolicyProvider.XML")) {
91 background_load(); // guarantees an exception or the policy is loaded
94 ~XMLSecurityPolicyProvider() {
98 const PropertySet* getPolicySettings(const char* id=nullptr) const {
100 return m_impl->m_defaultPolicy->second.first.get();
101 XMLSecurityPolicyProviderImpl::policymap_t::const_iterator i = m_impl->m_policyMap.find(id);
102 if (i != m_impl->m_policyMap.end())
103 return i->second.first.get();
104 throw ConfigurationException("Security Policy ($1) not found, check <SecurityPolicies> element.", params(1,id));
107 const vector<const SecurityPolicyRule*>& getPolicyRules(const char* id=nullptr) const {
109 return m_impl->m_defaultPolicy->second.second;
110 XMLSecurityPolicyProviderImpl::policymap_t::const_iterator i = m_impl->m_policyMap.find(id);
111 if (i != m_impl->m_policyMap.end())
112 return i->second.second;
113 throw ConfigurationException("Security Policy ($1) not found, check <SecurityPolicies> element.", params(1,id));
115 const vector<xstring>& getAlgorithmBlacklist() const {
116 return m_impl->m_blacklist;
118 const vector<xstring>& getAlgorithmWhitelist() const {
119 return m_impl->m_whitelist;
123 pair<bool,DOMElement*> load(bool backup);
124 pair<bool,DOMElement*> background_load();
127 scoped_ptr<XMLSecurityPolicyProviderImpl> m_impl;
130 #if defined (_MSC_VER)
131 #pragma warning( pop )
134 SecurityPolicyProvider* SHIBSP_DLLLOCAL XMLSecurityPolicyProviderFactory(const DOMElement* const & e)
136 return new XMLSecurityPolicyProvider(e);
139 class SHIBSP_DLLLOCAL PolicyNodeFilter : public DOMNodeFilter
142 #ifdef SHIBSP_XERCESC_SHORT_ACCEPTNODE
147 acceptNode(const DOMNode* node) const {
148 return FILTER_REJECT;
152 static const XMLCh _id[] = UNICODE_LITERAL_2(i,d);
153 static const XMLCh _type[] = UNICODE_LITERAL_4(t,y,p,e);
154 static const XMLCh AlgorithmBlacklist[] = UNICODE_LITERAL_18(A,l,g,o,r,i,t,h,m,B,l,a,c,k,l,i,s,t);
155 static const XMLCh AlgorithmWhitelist[] = UNICODE_LITERAL_18(A,l,g,o,r,i,t,h,m,W,h,i,t,e,l,i,s,t);
156 static const XMLCh Policy[] = UNICODE_LITERAL_6(P,o,l,i,c,y);
157 static const XMLCh PolicyRule[] = UNICODE_LITERAL_10(P,o,l,i,c,y,R,u,l,e);
158 static const XMLCh Rule[] = UNICODE_LITERAL_4(R,u,l,e);
159 static const XMLCh SecurityPolicies[] = UNICODE_LITERAL_16(S,e,c,u,r,i,t,y,P,o,l,i,c,i,e,s);
162 void SHIBSP_API shibsp::registerSecurityPolicyProviders()
164 SPConfig::getConfig().SecurityPolicyProviderManager.registerFactory(XML_SECURITYPOLICY_PROVIDER, XMLSecurityPolicyProviderFactory);
167 SecurityPolicyProvider::SecurityPolicyProvider()
171 SecurityPolicyProvider::~SecurityPolicyProvider()
175 SecurityPolicy* SecurityPolicyProvider::createSecurityPolicy(
176 const Application& application, const xmltooling::QName* role, const char* policyId
179 pair<bool,bool> validate = getPolicySettings(policyId ? policyId : application.getString("policyId").second)->getBool("validate");
180 return new SecurityPolicy(application, role, (validate.first && validate.second), policyId);
183 XMLSecurityPolicyProviderImpl::XMLSecurityPolicyProviderImpl(const DOMElement* e, Category& log)
184 : m_document(nullptr), m_defaultPolicy(m_policyMap.end())
187 xmltooling::NDC ndc("XMLSecurityPolicyProviderImpl");
190 if (!XMLHelper::isNodeNamed(e, SHIB2SPCONFIG_NS, SecurityPolicies))
191 throw ConfigurationException("XML SecurityPolicyProvider requires conf:SecurityPolicies at root of configuration.");
193 const XMLCh* algs = nullptr;
194 const DOMElement* alglist = XMLHelper::getLastChildElement(e, AlgorithmBlacklist);
195 if (alglist && alglist->hasChildNodes()) {
196 algs = alglist->getFirstChild()->getNodeValue();
198 else if ((alglist = XMLHelper::getLastChildElement(e, AlgorithmWhitelist)) && alglist->hasChildNodes()) {
199 algs = alglist->getFirstChild()->getNodeValue();
203 XMLStringTokenizer tokenizer(algs);
204 while (tokenizer.hasMoreTokens()) {
205 token = tokenizer.nextToken();
207 if (XMLString::equals(alglist->getLocalName(), AlgorithmBlacklist))
208 m_blacklist.push_back(token);
210 m_whitelist.push_back(token);
215 PolicyNodeFilter filter;
216 SAMLConfig& samlConf = SAMLConfig::getConfig();
217 e = XMLHelper::getFirstChildElement(e, Policy);
219 string id(XMLHelper::getAttrString(e, nullptr, _id));
220 policymap_t::mapped_type& rules = m_policyMap[id];
221 boost::shared_ptr<DOMPropertySet> settings(new DOMPropertySet());
222 settings->load(e, nullptr, &filter);
223 rules.first = settings;
225 // Set default policy if not set, or id is "default".
226 if (m_defaultPolicy == m_policyMap.end() || id == "default")
227 m_defaultPolicy = m_policyMap.find(id);
229 // Process PolicyRule elements.
230 const DOMElement* rule = XMLHelper::getFirstChildElement(e, PolicyRule);
232 string t(XMLHelper::getAttrString(rule, nullptr, _type));
235 boost::shared_ptr<SecurityPolicyRule> ptr(samlConf.SecurityPolicyRuleManager.newPlugin(t.c_str(), rule));
236 m_ruleJanitor.push_back(ptr);
237 rules.second.push_back(ptr.get());
239 catch (std::exception& ex) {
240 log.crit("error instantiating policy rule (%s) in policy (%s): %s", t.c_str(), id.c_str(), ex.what());
243 rule = XMLHelper::getNextSiblingElement(rule, PolicyRule);
246 if (rules.second.size() == 0) {
247 // Process Rule elements.
248 log.warn("detected deprecated Policy configuration, consider converting to new PolicyRule syntax");
249 rule = XMLHelper::getFirstChildElement(e, Rule);
251 string t(XMLHelper::getAttrString(rule, nullptr, _type));
254 boost::shared_ptr<SecurityPolicyRule> ptr(samlConf.SecurityPolicyRuleManager.newPlugin(t.c_str(), rule));
255 m_ruleJanitor.push_back(ptr);
256 rules.second.push_back(ptr.get());
258 catch (std::exception& ex) {
259 log.crit("error instantiating policy rule (%s) in policy (%s): %s", t.c_str(), id.c_str(), ex.what());
262 rule = XMLHelper::getNextSiblingElement(rule, Rule);
265 // Manually add a basic Conditions rule.
266 log.info("installing a default Conditions rule in policy (%s) for compatibility with legacy configuration", id.c_str());
267 boost::shared_ptr<SecurityPolicyRule> cptr(samlConf.SecurityPolicyRuleManager.newPlugin(CONDITIONS_POLICY_RULE, nullptr));
268 m_ruleJanitor.push_back(cptr);
269 rules.second.push_back(cptr.get());
272 e = XMLHelper::getNextSiblingElement(e, Policy);
275 if (m_defaultPolicy == m_policyMap.end())
276 throw ConfigurationException("XML SecurityPolicyProvider requires at least one Policy.");
279 pair<bool,DOMElement*> XMLSecurityPolicyProvider::load(bool backup)
281 // Load from source using base class.
282 pair<bool,DOMElement*> raw = ReloadableXMLFile::load(backup);
284 // If we own it, wrap it.
285 XercesJanitor<DOMDocument> docjanitor(raw.first ? raw.second->getOwnerDocument() : nullptr);
287 scoped_ptr<XMLSecurityPolicyProviderImpl> impl(new XMLSecurityPolicyProviderImpl(raw.second, m_log));
289 // If we held the document, transfer it to the impl. If we didn't, it's a no-op.
290 impl->setDocument(docjanitor.release());
292 // Perform the swap inside a lock.
295 SharedLock locker(m_lock, false);
298 return make_pair(false,(DOMElement*)nullptr);
301 pair<bool,DOMElement*> XMLSecurityPolicyProvider::background_load()
307 if (ex == HTTPResponse::XMLTOOLING_HTTP_STATUS_NOTMODIFIED)
308 m_log.info("remote resource (%s) unchanged", m_source.c_str());
309 if (!m_loaded && !m_backing.empty())
313 catch (std::exception&) {
314 if (!m_loaded && !m_backing.empty())