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 * SAML2POSTDecoder.cpp
20 * SAML 2.0 HTTP POST binding message encoder
24 #include "exceptions.h"
25 #include "binding/HTTPRequest.h"
26 #include "saml2/binding/SAML2POSTDecoder.h"
27 #include "saml2/core/Protocols.h"
28 #include "saml2/metadata/Metadata.h"
29 #include "saml2/metadata/MetadataProvider.h"
31 #include <log4cpp/Category.hh>
32 #include <xercesc/util/Base64.hpp>
33 #include <xmltooling/util/NDC.h>
34 #include <xmltooling/validation/ValidatorSuite.h>
36 using namespace opensaml::saml2md;
37 using namespace opensaml::saml2p;
38 using namespace opensaml::saml2;
39 using namespace opensaml;
40 using namespace xmltooling;
41 using namespace log4cpp;
46 MessageDecoder* SAML_DLLLOCAL SAML2POSTDecoderFactory(const DOMElement* const & e)
48 return new SAML2POSTDecoder(e);
53 SAML2POSTDecoder::SAML2POSTDecoder(const DOMElement* e) {}
55 XMLObject* SAML2POSTDecoder::decode(
56 std::string& relayState,
57 const GenericRequest& genericRequest,
58 SecurityPolicy& policy
62 xmltooling::NDC ndc("decode");
64 Category& log = Category::getInstance(SAML_LOGCAT".MessageDecoder.SAML2POST");
66 log.debug("validating input");
67 const HTTPRequest* httpRequest=dynamic_cast<const HTTPRequest*>(&genericRequest);
69 log.error("unable to cast request to HTTPRequest type");
72 if (strcmp(httpRequest->getMethod(),"POST"))
74 const char* msg = httpRequest->getParameter("SAMLResponse");
76 msg = httpRequest->getParameter("SAMLRequest");
79 const char* state = httpRequest->getParameter("RelayState");
85 // Decode the base64 into SAML.
87 XMLByte* decoded=Base64::decode(reinterpret_cast<const XMLByte*>(msg),&x);
89 throw BindingException("Unable to decode base64 in POST binding message.");
90 log.debug("decoded SAML message:\n%s", decoded);
91 istringstream is(reinterpret_cast<char*>(decoded));
92 XMLString::release(&decoded);
94 // Parse and bind the document into an XMLObject.
95 DOMDocument* doc = (m_validate ? XMLToolingConfig::getConfig().getValidatingParser()
96 : XMLToolingConfig::getConfig().getParser()).parse(is);
97 XercesJanitor<DOMDocument> janitor(doc);
98 auto_ptr<XMLObject> xmlObject(XMLObjectBuilder::buildOneFromElement(doc->getDocumentElement(), true));
101 saml2::RootObject* root = NULL;
102 StatusResponseType* response = NULL;
103 RequestAbstractType* request = dynamic_cast<RequestAbstractType*>(xmlObject.get());
105 response = dynamic_cast<StatusResponseType*>(xmlObject.get());
107 throw BindingException("XML content for SAML 2.0 HTTP-POST Decoder must be a SAML 2.0 protocol message.");
108 root = static_cast<saml2::RootObject*>(response);
111 root = static_cast<saml2::RootObject*>(request);
116 SchemaValidators.validate(xmlObject.get());
118 // Check destination URL.
119 auto_ptr_char dest(request ? request->getDestination() : response->getDestination());
120 const char* dest2 = httpRequest->getRequestURL();
121 if ((root->getSignature() || httpRequest->getParameter("Signature")) && !dest.get() || !*(dest.get())) {
122 log.error("signed SAML message missing Destination attribute");
123 throw BindingException("Signed SAML message missing Destination attribute identifying intended destination.");
125 else if (dest.get() && (!dest2 || !*dest2 || strcmp(dest.get(),dest2))) {
126 log.error("POST targeted at (%s), but delivered to (%s)", dest.get(), dest2 ? dest2 : "none");
127 throw BindingException("SAML message delivered with POST to incorrect server URL.");
130 // Run through the policy.
131 policy.evaluate(genericRequest, *root);
133 catch (XMLToolingException& ex) {
134 // This is just to maximize the likelihood of attaching a source to the message for support purposes.
135 if (policy.getIssuerMetadata())
136 annotateException(&ex,policy.getIssuerMetadata()); // throws it
138 const Issuer* claimedIssuer = root->getIssuer();
139 if (!claimedIssuer) {
140 // Check for assertions.
141 const Response* assbag = dynamic_cast<Response*>(response);
143 const vector<Assertion*>& assertions=assbag->getAssertions();
144 if (!assertions.empty())
145 claimedIssuer = assertions.front()->getIssuer();
149 if (!claimedIssuer || !claimedIssuer->getName())
151 const EntityDescriptor* provider=NULL;
152 if (!policy.getMetadataProvider() ||
153 !(provider=policy.getMetadataProvider()->getEntityDescriptor(claimedIssuer->getName(), false))) {
155 auto_ptr_char iname(claimedIssuer->getName());
157 ex.addProperty("entityID", iname.get());
161 if (policy.getRole()) {
162 const RoleDescriptor* roledesc=provider->getRoleDescriptor(*(policy.getRole()), samlconstants::SAML20P_NS);
163 if (roledesc) annotateException(&ex,roledesc); // throws it
165 annotateException(&ex,provider); // throws it