2 * Copyright 2001-2006 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 * SAML2POSTEncoder.cpp
20 * SAML 2.0 HTTP-POST binding message encoder
24 #include "exceptions.h"
25 #include "binding/HTTPResponse.h"
26 #include "saml2/binding/SAML2POSTEncoder.h"
27 #include "saml2/core/Protocols.h"
31 #include <log4cpp/Category.hh>
32 #include <xercesc/util/Base64.hpp>
33 #include <xmltooling/util/NDC.h>
34 #include <xmltooling/util/TemplateEngine.h>
36 using namespace opensaml::saml2p;
37 using namespace opensaml;
38 using namespace xmlsignature;
39 using namespace xmltooling;
40 using namespace log4cpp;
45 MessageEncoder* SAML_DLLLOCAL SAML2POSTEncoderFactory(const DOMElement* const & e)
47 return new SAML2POSTEncoder(e);
52 static const XMLCh templat[] = UNICODE_LITERAL_8(t,e,m,p,l,a,t,e);
54 SAML2POSTEncoder::SAML2POSTEncoder(const DOMElement* e)
57 auto_ptr_char t(e->getAttributeNS(NULL, templat));
61 if (m_template.empty())
62 throw XMLToolingException("SAML2POSTEncoder requires template attribute.");
65 SAML2POSTEncoder::~SAML2POSTEncoder() {}
67 long SAML2POSTEncoder::encode(
68 GenericResponse& genericResponse,
70 const char* destination,
71 const char* recipientID,
72 const char* relayState,
73 const CredentialResolver* credResolver,
74 const XMLCh* sigAlgorithm
78 xmltooling::NDC ndc("encode");
80 Category& log = Category::getInstance(SAML_LOGCAT".MessageEncoder.SAML2POST");
82 log.debug("validating input");
83 HTTPResponse* httpResponse=dynamic_cast<HTTPResponse*>(&genericResponse);
85 throw BindingException("Unable to cast response interface to HTTPResponse type.");
86 if (xmlObject->getParent())
87 throw BindingException("Cannot encode XML content with parent.");
89 StatusResponseType* response = NULL;
90 RequestAbstractType* request = dynamic_cast<RequestAbstractType*>(xmlObject);
92 response = dynamic_cast<StatusResponseType*>(xmlObject);
94 throw BindingException("XML content for SAML 2.0 HTTP-POST Encoder must be a SAML 2.0 protocol message.");
97 DOMElement* rootElement = NULL;
99 // Signature based on native XML signing.
100 if (request ? request->getSignature() : response->getSignature()) {
101 log.debug("message already signed, skipping signature operation");
104 log.debug("signing and marshalling the message");
106 // Build a Signature.
107 Signature* sig = buildSignature(credResolver, sigAlgorithm);
110 request ? request->setSignature(sig) : response->setSignature(sig);
112 // Sign response while marshalling.
113 vector<Signature*> sigs(1,sig);
114 rootElement = xmlObject->marshall((DOMDocument*)NULL,&sigs);
118 log.debug("marshalling the message");
119 rootElement = xmlObject->marshall();
123 XMLHelper::serialize(rootElement, xmlbuf);
125 XMLByte* out=Base64::encode(reinterpret_cast<const XMLByte*>(xmlbuf.data()),xmlbuf.size(),&len);
128 xmlbuf.append(reinterpret_cast<char*>(out),len);
129 XMLString::release(&out);
132 throw BindingException("Base64 encoding of XML failed.");
135 // Push message into template and send result to client.
136 log.debug("message encoded, sending HTML form template to client");
137 TemplateEngine* engine = XMLToolingConfig::getConfig().getTemplateEngine();
139 throw BindingException("Encoding message using POST requires a TemplateEngine instance.");
140 ifstream infile(m_template.c_str());
142 throw BindingException("Failed to open HTML template for POST message ($1).", params(1,m_template.c_str()));
143 map<string,string> params;
144 params["action"] = destination;
145 params[request ? "SAMLRequest" : "SAMLResponse"] = xmlbuf;
147 params["RelayState"] = relayState;
149 engine->run(infile, s, params);
150 httpResponse->setContentType("text/html");
151 long ret = httpResponse->sendResponse(s, HTTPResponse::SAML_HTTP_STATUS_OK);
153 // Cleanup by destroying XML.