2 * Copyright 2001-2010 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
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 * XMLMetadataProvider.cpp
20 * Supplies metadata from an XML file
24 #include "binding/SAMLArtifact.h"
25 #include "saml2/metadata/Metadata.h"
26 #include "saml2/metadata/MetadataFilter.h"
27 #include "saml2/metadata/AbstractMetadataProvider.h"
30 #include <xmltooling/util/NDC.h>
31 #include <xmltooling/util/ReloadableXMLFile.h>
32 #include <xmltooling/util/Threads.h>
33 #include <xmltooling/validation/ValidatorSuite.h>
35 using namespace opensaml::saml2md;
36 using namespace xmltooling::logging;
37 using namespace xmltooling;
40 #if defined (_MSC_VER)
41 #pragma warning( push )
42 #pragma warning( disable : 4250 )
48 class SAML_DLLLOCAL XMLMetadataProvider : public AbstractMetadataProvider, public ReloadableXMLFile
51 XMLMetadataProvider(const DOMElement* e)
52 : AbstractMetadataProvider(e), ReloadableXMLFile(e, Category::getInstance(SAML_LOGCAT".MetadataProvider.XML")),
53 m_object(NULL), m_maxCacheDuration(m_reloadInterval) {
55 virtual ~XMLMetadataProvider() {
60 background_load(); // guarantees an exception or the metadata is loaded
63 const XMLObject* getMetadata() const {
68 pair<bool,DOMElement*> background_load();
71 using AbstractMetadataProvider::index;
75 time_t m_maxCacheDuration;
78 MetadataProvider* SAML_DLLLOCAL XMLMetadataProviderFactory(const DOMElement* const & e)
80 return new XMLMetadataProvider(e);
86 #if defined (_MSC_VER)
87 #pragma warning( pop )
90 pair<bool,DOMElement*> XMLMetadataProvider::background_load()
92 // Turn off auto-backup so we can filter first.
93 m_backupIndicator = false;
95 // Load from source using base class.
96 pair<bool,DOMElement*> raw = ReloadableXMLFile::load();
98 // If we own it, wrap it for now.
99 XercesJanitor<DOMDocument> docjanitor(raw.first ? raw.second->getOwnerDocument() : NULL);
101 // Unmarshall objects, binding the document.
102 auto_ptr<XMLObject> xmlObject(XMLObjectBuilder::buildOneFromElement(raw.second, true));
103 docjanitor.release();
105 if (!dynamic_cast<const EntitiesDescriptor*>(xmlObject.get()) && !dynamic_cast<const EntityDescriptor*>(xmlObject.get()))
106 throw MetadataException(
107 "Root of metadata instance not recognized: $1", params(1,xmlObject->getElementQName().toString().c_str())
110 // Preprocess the metadata (even if we schema-validated).
112 SchemaValidators.validate(xmlObject.get());
114 catch (exception& ex) {
115 m_log.error("metadata intance failed manual validation checking: %s", ex.what());
116 throw MetadataException("Metadata instance failed manual validation checking.");
119 // If the backup indicator is flipped, then this was a remote load and we need a backup.
120 // This is the best place to take a backup, since it's superficially "correct" metadata.
122 if (m_backupIndicator) {
123 // We compute a random filename extension to the "real" location.
124 SAMLConfig::getConfig().generateRandomBytes(backupKey, 2);
125 backupKey = m_backing + '.' + SAMLArtifact::toHex(backupKey);
126 m_log.debug("backing up remote metadata resource to (%s)", backupKey.c_str());
128 ofstream backer(backupKey.c_str());
129 backer << *raw.second->getOwnerDocument();
131 catch (exception& ex) {
132 m_log.crit("exception while backing up metadata: %s", ex.what());
138 doFilters(*xmlObject.get());
141 if (!backupKey.empty())
142 remove(backupKey.c_str());
146 if (!backupKey.empty()) {
147 m_log.debug("committing backup file to permanent location (%s)", m_backing.c_str());
148 Locker locker(getBackupLock());
149 remove(m_backing.c_str());
150 if (rename(backupKey.c_str(), m_backing.c_str()) != 0)
151 m_log.crit("unable to rename metadata backup file");
154 xmlObject->releaseThisAndChildrenDOM();
155 xmlObject->setDocument(NULL);
157 // Swap it in after acquiring write lock if necessary.
160 SharedLock locker(m_lock, false);
161 bool changed = m_object!=NULL;
163 m_object = xmlObject.release();
168 // If a remote resource, adjust the reload interval if cacheDuration is set.
170 const CacheableSAMLObject* cacheable = dynamic_cast<const CacheableSAMLObject*>(m_object);
171 if (cacheable && cacheable->getCacheDuration() && cacheable->getCacheDurationEpoch() < m_maxCacheDuration)
172 m_reloadInterval = cacheable->getCacheDurationEpoch();
174 m_reloadInterval = m_maxCacheDuration;
177 return make_pair(false,(DOMElement*)NULL);
180 void XMLMetadataProvider::index()
182 clearDescriptorIndex();
183 EntitiesDescriptor* group=dynamic_cast<EntitiesDescriptor*>(m_object);
185 AbstractMetadataProvider::index(group, SAMLTIME_MAX);
188 AbstractMetadataProvider::index(dynamic_cast<EntityDescriptor*>(m_object), SAMLTIME_MAX);