2 * Copyright 2001-2007 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 * SAML1POSTEncoder.cpp
20 * SAML 1.x POST binding/profile message encoder
24 #include "exceptions.h"
25 #include "binding/MessageEncoder.h"
26 #include "signature/ContentReference.h"
27 #include "saml1/core/Protocols.h"
31 #include <xercesc/util/Base64.hpp>
32 #include <xmltooling/io/HTTPResponse.h>
33 #include <xmltooling/logging.h>
34 #include <xmltooling/util/NDC.h>
35 #include <xmltooling/util/PathResolver.h>
36 #include <xmltooling/util/TemplateEngine.h>
38 using namespace opensaml::saml1p;
39 using namespace opensaml::saml2md;
40 using namespace opensaml;
41 using namespace xmlsignature;
42 using namespace xmltooling::logging;
43 using namespace xmltooling;
48 class SAML_DLLLOCAL SAML1POSTEncoder : public MessageEncoder
51 SAML1POSTEncoder(const DOMElement* e, const XMLCh* ns);
52 virtual ~SAML1POSTEncoder() {}
55 GenericResponse& genericResponse,
57 const char* destination,
58 const EntityDescriptor* recipient=NULL,
59 const char* relayState=NULL,
60 const ArtifactGenerator* artifactGenerator=NULL,
61 const Credential* credential=NULL,
62 const XMLCh* signatureAlg=NULL,
63 const XMLCh* digestAlg=NULL
67 /** Pathname of HTML template for transmission of message via POST. */
71 MessageEncoder* SAML_DLLLOCAL SAML1POSTEncoderFactory(const pair<const DOMElement*,const XMLCh*>& p)
73 return new SAML1POSTEncoder(p.first, p.second);
78 static const XMLCh _template[] = UNICODE_LITERAL_8(t,e,m,p,l,a,t,e);
80 SAML1POSTEncoder::SAML1POSTEncoder(const DOMElement* e, const XMLCh* ns)
83 auto_ptr_char t(e->getAttributeNS(ns, _template));
84 if (t.get() && *t.get())
87 if (m_template.empty())
88 throw XMLToolingException("SAML1POSTEncoder requires template XML attribute.");
89 XMLToolingConfig::getConfig().getPathResolver()->resolve(m_template, PathResolver::XMLTOOLING_CFG_FILE);
92 long SAML1POSTEncoder::encode(
93 GenericResponse& genericResponse,
95 const char* destination,
96 const EntityDescriptor* recipient,
97 const char* relayState,
98 const ArtifactGenerator* artifactGenerator,
99 const Credential* credential,
100 const XMLCh* signatureAlg,
101 const XMLCh* digestAlg
105 xmltooling::NDC ndc("encode");
107 Category& log = Category::getInstance(SAML_LOGCAT".MessageEncoder.SAML1POST");
109 TemplateEngine* engine = XMLToolingConfig::getConfig().getTemplateEngine();
111 throw BindingException("Encoding response using POST requires a TemplateEngine instance.");
113 log.debug("validating input");
114 if (xmlObject->getParent())
115 throw BindingException("Cannot encode XML content with parent.");
116 Response* response = dynamic_cast<Response*>(xmlObject);
118 throw BindingException("XML content for SAML 1.x POST Encoder must be a SAML 1.x <Response>.");
120 throw BindingException("SAML 1.x POST Encoder requires relay state (TARGET) value.");
122 DOMElement* rootElement = NULL;
124 // Signature based on native XML signing.
125 if (response->getSignature()) {
126 log.debug("response already signed, skipping signature operation");
129 log.debug("signing and marshalling the response");
131 // Build a Signature.
132 Signature* sig = SignatureBuilder::buildSignature();
133 response->setSignature(sig);
135 sig->setSignatureAlgorithm(signatureAlg);
137 opensaml::ContentReference* cr = dynamic_cast<opensaml::ContentReference*>(sig->getContentReference());
139 cr->setDigestAlgorithm(digestAlg);
142 // Sign response while marshalling.
143 vector<Signature*> sigs(1,sig);
144 rootElement = response->marshall((DOMDocument*)NULL,&sigs,credential);
148 log.debug("marshalling the response");
149 rootElement = response->marshall();
152 // Push message into template.
153 TemplateEngine::TemplateParameters pmap;
154 string& xmlbuf = pmap.m_map["SAMLResponse"];
155 XMLHelper::serialize(rootElement, xmlbuf);
156 log.debug("marshalled response:\n%s", xmlbuf.c_str());
158 // Replace with base-64 encoded version.
160 XMLByte* out=Base64::encode(reinterpret_cast<const XMLByte*>(xmlbuf.data()),xmlbuf.size(),&len);
163 xmlbuf.append(reinterpret_cast<char*>(out),len);
164 #ifdef OPENSAML_XERCESC_HAS_XMLBYTE_RELEASE
165 XMLString::release(&out);
167 XMLString::release((char**)&out);
171 throw BindingException("Base64 encoding of XML failed.");
174 // Fill in the rest of the data and send to the client.
175 log.debug("message encoded, sending HTML form template to client");
176 ifstream infile(m_template.c_str());
178 throw BindingException("Failed to open HTML template for POST response ($1).", params(1,m_template.c_str()));
179 pmap.m_map["action"] = destination;
180 pmap.m_map["TARGET"] = relayState;
182 engine->run(infile, s, pmap);
183 genericResponse.setContentType("text/html");
184 HTTPResponse* httpResponse = dynamic_cast<HTTPResponse*>(&genericResponse);
186 httpResponse->setResponseHeader("Expires", "01-Jan-1997 12:00:00 GMT");
187 httpResponse->setResponseHeader("Cache-Control", "no-cache, no-store, must-revalidate, private");
188 httpResponse->setResponseHeader("Pragma", "no-cache");
190 long ret = genericResponse.sendResponse(s);
192 // Cleanup by destroying XML.