2 * Copyright 2001-2009 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 * @file saml/saml2/metadata/MetadataProvider.h
20 * Supplies an individual source of metadata.
23 #ifndef __saml2_metadataprov_h__
24 #define __saml2_metadataprov_h__
26 #include <saml/base.h>
27 #include <xmltooling/exceptions.h>
28 #include <xmltooling/security/CredentialResolver.h>
30 namespace xmltooling {
31 class XMLTOOL_API QName;
32 class XMLTOOL_API XMLObject;
37 class SAML_API SAMLArtifact;
41 class SAML_API EntityDescriptor;
42 class SAML_API EntitiesDescriptor;
43 class SAML_API RoleDescriptor;
44 class SAML_API MetadataCredentialResolver;
45 class SAML_API MetadataFilter;
47 #if defined (_MSC_VER)
48 #pragma warning( push )
49 #pragma warning( disable : 4251 )
53 * Supplies an individual source of metadata.
55 * The source can be a local file, remote service, or the result of a
56 * dynamic lookup, can include local caching, etc. Providers
57 * <strong>MUST</strong> be locked before any lookup operations.
59 class SAML_API MetadataProvider : public virtual xmltooling::CredentialResolver
61 MAKE_NONCOPYABLE(MetadataProvider);
66 * If a DOM is supplied, a set of default logic will be used to identify
67 * and build MetadataFilter plugins and install them into the provider.
69 * The following XML content is supported:
72 * <li><MetadataFilter> elements with a type attribute and type-specific content
73 * <li><Exclude> elements representing a BlacklistMetadataFilter
74 * <li><BlacklistMetadataFilter> element containing <Exclude> elements
75 * <li><Include> elements representing a WhitelistMetadataFilter
76 * <li><SignatureMetadataFilter> element containing a <KeyResolver> element
77 * <li><WhitelistMetadataFilter> element containing <Include> elements
80 * XML namespaces are ignored in the processing of these elements.
82 * @param e DOM to supply configuration for provider
84 MetadataProvider(const xercesc::DOMElement* e=NULL);
88 * Destructor will delete any installed filters.
90 virtual ~MetadataProvider();
93 * Adds a metadata filter to apply to any resolved metadata. Will not be applied
94 * to metadata that is already loaded.
96 * @param newFilter metadata filter to add
98 virtual void addMetadataFilter(MetadataFilter* newFilter) {
99 m_filters.push_back(newFilter);
103 * Removes a metadata filter. The caller must delete the filter if necessary.
105 * @param oldFilter metadata filter to remove
106 * @return the old filter
108 virtual MetadataFilter* removeMetadataFilter(MetadataFilter* oldFilter) {
109 for (std::vector<MetadataFilter*>::iterator i=m_filters.begin(); i!=m_filters.end(); i++) {
110 if (oldFilter==(*i)) {
119 * Should be called after instantiating provider and adding filters, but before
120 * performing any lookup operations. Allows the provider to defer initialization
121 * processes that are likely to result in exceptions until after the provider is
122 * safely created. Providers SHOULD perform as much processing as possible in
123 * this method so as to report/log any errors that would affect later processing.
125 virtual void init()=0;
128 * Gets the entire metadata tree, after the registered filter has been applied.
129 * The caller MUST unlock the provider when finished with the data.
131 * @return the entire metadata tree
133 virtual const xmltooling::XMLObject* getMetadata() const=0;
136 * Gets the metadata for a given group of entities. If a valid group is returned,
137 * the resolver will be left in a locked state. The caller MUST unlock the
138 * resolver when finished with the group.
140 * @param name the name of the group
141 * @param requireValidMetadata indicates whether the metadata for the group must be valid/current
143 * @return the group's metadata or NULL if there is no metadata or no valid metadata
145 virtual const EntitiesDescriptor* getEntitiesDescriptor(const XMLCh* name, bool requireValidMetadata=true) const;
148 * Gets the metadata for a given group of entities. If a valid group is returned,
149 * the resolver will be left in a locked state. The caller MUST unlock the
150 * resolver when finished with the group.
152 * @param name the name of the group
153 * @param requireValidMetadata indicates whether the metadata for the group must be valid/current
155 * @return the group's metadata or NULL if there is no metadata or no valid metadata
157 virtual const EntitiesDescriptor* getEntitiesDescriptor(const char* name, bool requireValidMetadata=true) const=0;
160 * Batches up criteria for entity lookup.
162 struct SAML_API Criteria {
164 * Default constructor.
166 Criteria() : entityID_unicode(NULL), entityID_ascii(NULL), artifact(NULL), role(NULL), protocol(NULL), protocol2(NULL), validOnly(true) {
172 * @param id entityID to lookup
173 * @param q element/type of role, if any
174 * @param prot protocol support constant, if any
175 * @param valid true iff stale metadata should be ignored
177 Criteria(const XMLCh* id, const xmltooling::QName* q=NULL, const XMLCh* prot=NULL, bool valid=true)
178 : entityID_unicode(id), entityID_ascii(NULL), artifact(NULL), role(q), protocol(prot), protocol2(NULL), validOnly(valid) {
184 * @param id entityID to lookup
185 * @param q element/type of role, if any
186 * @param prot protocol support constant, if any
187 * @param valid true iff stale metadata should be ignored
189 Criteria(const char* id, const xmltooling::QName* q=NULL, const XMLCh* prot=NULL, bool valid=true)
190 : entityID_unicode(NULL), entityID_ascii(id), artifact(NULL), role(q), protocol(prot), protocol2(NULL), validOnly(valid) {
196 * @param a artifact to lookup
197 * @param q element/type of role, if any
198 * @param prot protocol support constant, if any
199 * @param valid true iff stale metadata should be ignored
201 Criteria(const SAMLArtifact* a, const xmltooling::QName* q=NULL, const XMLCh* prot=NULL, bool valid=true)
202 : entityID_unicode(NULL), entityID_ascii(NULL), artifact(a), role(q), protocol(prot), protocol2(NULL), validOnly(valid) {
205 virtual ~Criteria() {}
208 * Restores the object to its default state.
210 virtual void reset() {
211 entityID_unicode=NULL;
220 /** Unique ID of entity. */
221 const XMLCh* entityID_unicode;
222 /** Unique ID of entity. */
223 const char* entityID_ascii;
225 const SAMLArtifact* artifact;
226 /** Element or schema type QName of metadata role. */
227 const xmltooling::QName* role;
228 /** Protocol support constant. */
229 const XMLCh* protocol;
230 /** Backup protocol support constant. */
231 const XMLCh* protocol2;
232 /** Controls whether stale metadata is ignored. */
237 * Gets entity metadata based on supplied criteria. If a valid entity is returned,
238 * the provider will be left in a locked state. The caller MUST unlock the
239 * provider when finished with the entity.
241 * @param criteria lookup criteria
243 * @return the entity's metadata (and optionally a role) or NULL if there is no qualifying metadata
245 virtual std::pair<const EntityDescriptor*,const RoleDescriptor*> getEntityDescriptor(const Criteria& criteria) const=0;
249 * Applies any installed filters to a metadata instance.
251 * @param xmlObject the metadata to be filtered
253 void doFilters(xmltooling::XMLObject& xmlObject) const;
256 std::vector<MetadataFilter*> m_filters;
259 #if defined (_MSC_VER)
260 #pragma warning( pop )
264 * Registers MetadataProvider classes into the runtime.
266 void SAML_API registerMetadataProviders();
268 /** MetadataProvider based on local or remote XML file */
269 #define XML_METADATA_PROVIDER "XML"
271 /** MetadataProvider based on dynamic resolution */
272 #define DYNAMIC_METADATA_PROVIDER "Dynamic"
274 /** MetadataProvider that wraps a sequence of metadata providers. */
275 #define CHAINING_METADATA_PROVIDER "Chaining"
277 /** MetadataProvider that returns an empty "dummy" entity descriptor. */
278 #define NULL_METADATA_PROVIDER "Null"
280 DECL_XMLTOOLING_EXCEPTION(MetadataException,SAML_EXCEPTIONAPI(SAML_API),opensaml::saml2md,xmltooling::XMLToolingException,Exceptions related to metadata use);
284 #endif /* __saml2_metadataprov_h__ */