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 * SAML2ArtifactEncoder.cpp
20 * SAML 2.0 HTTP-Artifact binding message encoder.
24 #include "exceptions.h"
25 #include "binding/ArtifactMap.h"
26 #include "binding/MessageEncoder.h"
27 #include "saml2/binding/SAML2Artifact.h"
28 #include "saml2/core/Protocols.h"
29 #include "saml2/metadata/Metadata.h"
30 #include "signature/ContentReference.h"
34 #include <xmltooling/logging.h>
35 #include <xmltooling/XMLToolingConfig.h>
36 #include <xmltooling/io/HTTPResponse.h>
37 #include <xmltooling/signature/Signature.h>
38 #include <xmltooling/util/NDC.h>
39 #include <xmltooling/util/PathResolver.h>
40 #include <xmltooling/util/TemplateEngine.h>
41 #include <xmltooling/util/URLEncoder.h>
43 using namespace opensaml::saml2p;
44 using namespace opensaml::saml2md;
45 using namespace opensaml;
46 using namespace xmlsignature;
47 using namespace xmltooling::logging;
48 using namespace xmltooling;
53 class SAML_DLLLOCAL SAML2ArtifactEncoder : public MessageEncoder
56 SAML2ArtifactEncoder(const DOMElement* e, const XMLCh* ns);
57 virtual ~SAML2ArtifactEncoder() {}
60 GenericResponse& genericResponse,
62 const char* destination,
63 const EntityDescriptor* recipient=NULL,
64 const char* relayState=NULL,
65 const ArtifactGenerator* artifactGenerator=NULL,
66 const Credential* credential=NULL,
67 const XMLCh* signatureAlg=NULL,
68 const XMLCh* digestAlg=NULL
76 MessageEncoder* SAML_DLLLOCAL SAML2ArtifactEncoderFactory(const pair<const DOMElement*,const XMLCh*>& p)
78 return new SAML2ArtifactEncoder(p.first, p.second);
82 static const XMLCh _template[] = UNICODE_LITERAL_8(t,e,m,p,l,a,t,e);
83 static const XMLCh postArtifact[] = UNICODE_LITERAL_12(p,o,s,t,A,r,t,i,f,a,c,t);
86 SAML2ArtifactEncoder::SAML2ArtifactEncoder(const DOMElement* e, const XMLCh* ns) : m_post(false)
89 const XMLCh* flag = e->getAttributeNS(ns, postArtifact);
90 m_post = (flag && (*flag==chLatin_t || *flag==chDigit_1));
92 auto_ptr_char t(e->getAttributeNS(ns, _template));
93 if (t.get() && *t.get()) {
95 XMLToolingConfig::getConfig().getPathResolver()->resolve(m_template, PathResolver::XMLTOOLING_CFG_FILE);
101 long SAML2ArtifactEncoder::encode(
102 GenericResponse& genericResponse,
103 XMLObject* xmlObject,
104 const char* destination,
105 const EntityDescriptor* recipient,
106 const char* relayState,
107 const ArtifactGenerator* artifactGenerator,
108 const Credential* credential,
109 const XMLCh* signatureAlg,
110 const XMLCh* digestAlg
114 xmltooling::NDC ndc("encode");
116 Category& log = Category::getInstance(SAML_LOGCAT".MessageEncoder.SAML2Artifact");
117 log.debug("validating input");
119 throw BindingException("Encoding response requires a destination.");
120 HTTPResponse* httpResponse=dynamic_cast<HTTPResponse*>(&genericResponse);
122 throw BindingException("Unable to cast response interface to HTTPResponse type.");
123 if (relayState && strlen(relayState)>80)
124 throw BindingException("RelayState cannot exceed 80 bytes in length.");
125 if (xmlObject->getParent())
126 throw BindingException("Cannot encode XML content with parent.");
128 StatusResponseType* response = NULL;
129 RequestAbstractType* request = dynamic_cast<RequestAbstractType*>(xmlObject);
131 response = dynamic_cast<StatusResponseType*>(xmlObject);
133 throw BindingException("XML content for SAML 2.0 HTTP-Artifact Encoder must be a SAML 2.0 protocol message.");
136 ArtifactMap* mapper = SAMLConfig::getConfig().getArtifactMap();
138 throw BindingException("SAML 2.0 HTTP-Artifact Encoder requires ArtifactMap be set in configuration.");
140 // Obtain a fresh artifact.
141 if (!artifactGenerator)
142 throw BindingException("SAML 2.0 HTTP-Artifact Encoder requires an ArtifactGenerator instance.");
143 auto_ptr_char recipientID(recipient ? recipient->getEntityID() : NULL);
144 log.debug("obtaining new artifact for relying party (%s)", recipientID.get() ? recipientID.get() : "unknown");
145 auto_ptr<SAMLArtifact> artifact(artifactGenerator->generateSAML2Artifact(recipient));
148 // Signature based on native XML signing.
149 if (request ? request->getSignature() : response->getSignature()) {
150 log.debug("message already signed, skipping signature operation");
153 log.debug("signing the message");
155 // Build a Signature.
156 Signature* sig = SignatureBuilder::buildSignature();
157 request ? request->setSignature(sig) : response->setSignature(sig);
159 sig->setSignatureAlgorithm(signatureAlg);
161 opensaml::ContentReference* cr = dynamic_cast<opensaml::ContentReference*>(sig->getContentReference());
163 cr->setDigestAlgorithm(digestAlg);
166 // Sign response while marshalling.
167 vector<Signature*> sigs(1,sig);
168 xmlObject->marshall((DOMDocument*)NULL,&sigs,credential);
172 if (log.isDebugEnabled())
173 log.debugStream() << "marshalled message:" << logging::eol << *xmlObject << logging::eol;
175 // Store the message. Last step in storage will be to delete the XML.
176 log.debug("storing artifact and content in map");
177 mapper->storeContent(xmlObject, artifact.get(), recipientID.get());
179 if (m_template.empty()) {
180 // Generate redirect.
181 string loc = destination;
182 loc += (strchr(destination,'?') ? '&' : '?');
183 const URLEncoder* escaper = XMLToolingConfig::getConfig().getURLEncoder();
184 loc = loc + "SAMLart=" + escaper->encode(artifact->encode().c_str());
185 if (relayState && *relayState)
186 loc = loc + "&RelayState=" + escaper->encode(relayState);
187 log.debug("message encoded, sending redirect to client");
188 return httpResponse->sendRedirect(loc.c_str());
191 // Push message into template and send result to client.
192 log.debug("message encoded, sending HTML form template to client");
193 TemplateEngine* engine = XMLToolingConfig::getConfig().getTemplateEngine();
195 throw BindingException("Encoding artifact using POST requires a TemplateEngine instance.");
196 HTTPResponse::sanitizeURL(destination);
197 ifstream infile(m_template.c_str());
199 throw BindingException("Failed to open HTML template for POST response ($1).", params(1,m_template.c_str()));
200 TemplateEngine::TemplateParameters params;
201 params.m_map["action"] = destination;
202 params.m_map["SAMLart"] = artifact->encode();
203 if (relayState && *relayState)
204 params.m_map["RelayState"] = relayState;
206 engine->run(infile, s, params);
207 httpResponse->setContentType("text/html");
208 httpResponse->setResponseHeader("Expires", "01-Jan-1997 12:00:00 GMT");
209 httpResponse->setResponseHeader("Cache-Control", "no-cache, no-store, must-revalidate, private");
210 httpResponse->setResponseHeader("Pragma", "no-cache");
211 return httpResponse->sendResponse(s);