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 * 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/XMLToolingConfig.h>
35 #include <xmltooling/signature/Signature.h>
36 #include <xmltooling/util/NDC.h>
37 #include <xmltooling/util/PathResolver.h>
38 #include <xmltooling/util/TemplateEngine.h>
40 using namespace opensaml::saml1p;
41 using namespace opensaml::saml2md;
42 using namespace opensaml;
43 using namespace xmlsignature;
44 using namespace xmltooling::logging;
45 using namespace xmltooling;
50 class SAML_DLLLOCAL SAML1POSTEncoder : public MessageEncoder
53 SAML1POSTEncoder(const DOMElement* e, const XMLCh* ns);
54 virtual ~SAML1POSTEncoder() {}
57 GenericResponse& genericResponse,
59 const char* destination,
60 const EntityDescriptor* recipient=NULL,
61 const char* relayState=NULL,
62 const ArtifactGenerator* artifactGenerator=NULL,
63 const Credential* credential=NULL,
64 const XMLCh* signatureAlg=NULL,
65 const XMLCh* digestAlg=NULL
69 /** Pathname of HTML template for transmission of message via POST. */
73 MessageEncoder* SAML_DLLLOCAL SAML1POSTEncoderFactory(const pair<const DOMElement*,const XMLCh*>& p)
75 return new SAML1POSTEncoder(p.first, p.second);
80 static const XMLCh _template[] = UNICODE_LITERAL_8(t,e,m,p,l,a,t,e);
82 SAML1POSTEncoder::SAML1POSTEncoder(const DOMElement* e, const XMLCh* ns)
85 auto_ptr_char t(e->getAttributeNS(ns, _template));
86 if (t.get() && *t.get())
89 if (m_template.empty())
90 throw XMLToolingException("SAML1POSTEncoder requires template XML attribute.");
91 XMLToolingConfig::getConfig().getPathResolver()->resolve(m_template, PathResolver::XMLTOOLING_CFG_FILE);
94 long SAML1POSTEncoder::encode(
95 GenericResponse& genericResponse,
97 const char* destination,
98 const EntityDescriptor* recipient,
99 const char* relayState,
100 const ArtifactGenerator* artifactGenerator,
101 const Credential* credential,
102 const XMLCh* signatureAlg,
103 const XMLCh* digestAlg
107 xmltooling::NDC ndc("encode");
109 Category& log = Category::getInstance(SAML_LOGCAT".MessageEncoder.SAML1POST");
111 TemplateEngine* engine = XMLToolingConfig::getConfig().getTemplateEngine();
113 throw BindingException("Encoding response using POST requires a TemplateEngine instance.");
115 log.debug("validating input");
116 if (xmlObject->getParent())
117 throw BindingException("Cannot encode XML content with parent.");
118 Response* response = dynamic_cast<Response*>(xmlObject);
120 throw BindingException("XML content for SAML 1.x POST Encoder must be a SAML 1.x <Response>.");
122 throw BindingException("SAML 1.x POST Encoder requires relay state (TARGET) value.");
124 DOMElement* rootElement = NULL;
126 // Signature based on native XML signing.
127 if (response->getSignature()) {
128 log.debug("response already signed, skipping signature operation");
131 log.debug("signing and marshalling the response");
133 // Build a Signature.
134 Signature* sig = SignatureBuilder::buildSignature();
135 response->setSignature(sig);
137 sig->setSignatureAlgorithm(signatureAlg);
139 opensaml::ContentReference* cr = dynamic_cast<opensaml::ContentReference*>(sig->getContentReference());
141 cr->setDigestAlgorithm(digestAlg);
144 // Sign response while marshalling.
145 vector<Signature*> sigs(1,sig);
146 rootElement = response->marshall((DOMDocument*)NULL,&sigs,credential);
150 log.debug("marshalling the response");
151 rootElement = response->marshall();
154 // Push message into template.
155 TemplateEngine::TemplateParameters pmap;
156 string& xmlbuf = pmap.m_map["SAMLResponse"];
157 XMLHelper::serialize(rootElement, xmlbuf);
158 log.debug("marshalled response:\n%s", xmlbuf.c_str());
160 // Replace with base-64 encoded version.
162 XMLByte* out=Base64::encode(reinterpret_cast<const XMLByte*>(xmlbuf.data()),xmlbuf.size(),&len);
165 xmlbuf.append(reinterpret_cast<char*>(out),len);
166 #ifdef OPENSAML_XERCESC_HAS_XMLBYTE_RELEASE
167 XMLString::release(&out);
169 XMLString::release((char**)&out);
173 throw BindingException("Base64 encoding of XML failed.");
176 // Fill in the rest of the data and send to the client.
177 log.debug("message encoded, sending HTML form template to client");
178 ifstream infile(m_template.c_str());
180 throw BindingException("Failed to open HTML template for POST response ($1).", params(1,m_template.c_str()));
181 pmap.m_map["action"] = destination;
182 pmap.m_map["TARGET"] = relayState;
184 engine->run(infile, s, pmap);
185 genericResponse.setContentType("text/html");
186 HTTPResponse* httpResponse = dynamic_cast<HTTPResponse*>(&genericResponse);
188 httpResponse->setResponseHeader("Expires", "01-Jan-1997 12:00:00 GMT");
189 httpResponse->setResponseHeader("Cache-Control", "no-cache, no-store, must-revalidate, private");
190 httpResponse->setResponseHeader("Pragma", "no-cache");
192 long ret = genericResponse.sendResponse(s);
194 // Cleanup by destroying XML.