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 "saml2/binding/SAML2POSTEncoder.h"
26 #include "saml2/core/Protocols.h"
30 #include <log4cpp/Category.hh>
31 #include <xercesc/util/Base64.hpp>
32 #include <xmltooling/util/NDC.h>
33 #include <xmltooling/util/TemplateEngine.h>
35 using namespace opensaml::saml2p;
36 using namespace opensaml;
37 using namespace xmlsignature;
38 using namespace xmltooling;
39 using namespace log4cpp;
44 MessageEncoder* SAML_DLLLOCAL SAML2POSTEncoderFactory(const DOMElement* const & e)
46 return new SAML2POSTEncoder(e);
51 static const XMLCh templat[] = UNICODE_LITERAL_8(t,e,m,p,l,a,t,e);
53 SAML2POSTEncoder::SAML2POSTEncoder(const DOMElement* e)
56 auto_ptr_char t(e->getAttributeNS(NULL, templat));
60 if (m_template.empty())
61 throw XMLToolingException("SAML2POSTEncoder requires template attribute.");
64 SAML2POSTEncoder::~SAML2POSTEncoder() {}
66 long SAML2POSTEncoder::encode(
67 HTTPResponse& httpResponse,
69 const char* destination,
70 const char* recipientID,
71 const char* relayState,
72 const CredentialResolver* credResolver,
73 const XMLCh* sigAlgorithm
77 xmltooling::NDC ndc("encode");
79 Category& log = Category::getInstance(SAML_LOGCAT".MessageEncoder.SAML2POST");
80 log.debug("validating input");
82 if (xmlObject->getParent())
83 throw BindingException("Cannot encode XML content with parent.");
85 StatusResponseType* response = NULL;
86 RequestAbstractType* request = dynamic_cast<RequestAbstractType*>(xmlObject);
88 response = dynamic_cast<StatusResponseType*>(xmlObject);
90 throw BindingException("XML content for SAML 2.0 HTTP-POST Encoder must be a SAML 2.0 protocol message.");
93 DOMElement* rootElement = NULL;
95 // Signature based on native XML signing.
96 if (request ? request->getSignature() : response->getSignature()) {
97 log.debug("message already signed, skipping signature operation");
100 log.debug("signing and marshalling the message");
102 // Build a Signature.
103 Signature* sig = buildSignature(credResolver, sigAlgorithm);
106 request ? request->setSignature(sig) : response->setSignature(sig);
108 // Sign response while marshalling.
109 vector<Signature*> sigs(1,sig);
110 rootElement = xmlObject->marshall((DOMDocument*)NULL,&sigs);
114 log.debug("marshalling the message");
115 rootElement = xmlObject->marshall();
119 XMLHelper::serialize(rootElement, xmlbuf);
121 XMLByte* out=Base64::encode(reinterpret_cast<const XMLByte*>(xmlbuf.data()),xmlbuf.size(),&len);
124 xmlbuf.append(reinterpret_cast<char*>(out),len);
125 XMLString::release(&out);
128 throw BindingException("Base64 encoding of XML failed.");
131 // Push message into template and send result to client.
132 log.debug("message encoded, sending HTML form template to client");
133 TemplateEngine* engine = XMLToolingConfig::getConfig().getTemplateEngine();
135 throw BindingException("Encoding message using POST requires a TemplateEngine instance.");
136 ifstream infile(m_template.c_str());
138 throw BindingException("Failed to open HTML template for POST message ($1).", params(1,m_template.c_str()));
139 map<string,string> params;
140 params["action"] = destination;
141 params[request ? "SAMLRequest" : "SAMLResponse"] = xmlbuf;
143 params["RelayState"] = relayState;
145 engine->run(infile, s, params);
146 long ret = httpResponse.sendResponse(s);
148 // Cleanup by destroying XML.