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 * SAML2RedirectDecoder.cpp
20 * SAML 2.0 HTTP Redirect binding message encoder
24 #include "exceptions.h"
25 #include "binding/HTTPRequest.h"
26 #include "saml2/binding/SAML2Redirect.h"
27 #include "saml2/binding/SAML2RedirectDecoder.h"
28 #include "saml2/core/Protocols.h"
29 #include "saml2/metadata/Metadata.h"
30 #include "saml2/metadata/MetadataProvider.h"
32 #include <log4cpp/Category.hh>
33 #include <xercesc/util/Base64.hpp>
34 #include <xmltooling/util/NDC.h>
35 #include <xmltooling/validation/ValidatorSuite.h>
37 using namespace opensaml::saml2md;
38 using namespace opensaml::saml2p;
39 using namespace opensaml::saml2;
40 using namespace opensaml;
41 using namespace xmlsignature;
42 using namespace xmltooling;
43 using namespace log4cpp;
48 MessageDecoder* SAML_DLLLOCAL SAML2RedirectDecoderFactory(const DOMElement* const & e)
50 return new SAML2RedirectDecoder(e);
55 SAML2RedirectDecoder::SAML2RedirectDecoder(const DOMElement* e) {}
57 XMLObject* SAML2RedirectDecoder::decode(
59 const GenericRequest& genericRequest,
60 SecurityPolicy& policy
64 xmltooling::NDC ndc("decode");
66 Category& log = Category::getInstance(SAML_LOGCAT".MessageDecoder.SAML2Redirect");
68 log.debug("validating input");
69 const HTTPRequest* httpRequest=dynamic_cast<const HTTPRequest*>(&genericRequest);
71 log.error("unable to cast request to HTTPRequest type");
74 if (strcmp(httpRequest->getMethod(),"GET"))
76 const char* msg = httpRequest->getParameter("SAMLResponse");
78 msg = httpRequest->getParameter("SAMLRequest");
81 const char* state = httpRequest->getParameter("RelayState");
86 state = httpRequest->getParameter("SAMLEncoding");
87 if (state && strcmp(state,samlconstants::SAML20_BINDING_URL_ENCODING_DEFLATE)) {
88 log.warn("SAMLEncoding (%s) was not recognized", state);
92 // Decode the compressed message into SAML. First we base64-decode it.
94 XMLByte* decoded=Base64::decode(reinterpret_cast<const XMLByte*>(msg),&x);
96 throw BindingException("Unable to decode base64 in Redirect binding message.");
98 // Now we have to inflate it.
100 if (inflate((char*)decoded, x, s)==0) {
101 XMLString::release(&decoded);
102 throw BindingException("Unable to inflate Redirect binding message.");
104 if (log.isDebugEnabled())
105 log.debug("decoded SAML message:\n%s", s.str().c_str());
106 XMLString::release(&decoded);
108 // Parse and bind the document into an XMLObject.
109 DOMDocument* doc = (m_validate ? XMLToolingConfig::getConfig().getValidatingParser()
110 : XMLToolingConfig::getConfig().getParser()).parse(s);
111 XercesJanitor<DOMDocument> janitor(doc);
112 auto_ptr<XMLObject> xmlObject(XMLObjectBuilder::buildOneFromElement(doc->getDocumentElement(), true));
115 saml2::RootObject* root = NULL;
116 StatusResponseType* response = NULL;
117 RequestAbstractType* request = dynamic_cast<RequestAbstractType*>(xmlObject.get());
119 response = dynamic_cast<StatusResponseType*>(xmlObject.get());
121 throw BindingException("XML content for SAML 2.0 HTTP-POST Decoder must be a SAML 2.0 protocol message.");
122 root = static_cast<saml2::RootObject*>(response);
125 root = static_cast<saml2::RootObject*>(request);
129 SchemaValidators.validate(xmlObject.get());
131 // Run through the policy.
132 policy.evaluate(*root, &genericRequest);
134 // Check destination URL.
135 auto_ptr_char dest(request ? request->getDestination() : response->getDestination());
136 const char* dest2 = httpRequest->getRequestURL();
137 if ((root->getSignature() || httpRequest->getParameter("Signature")) && !dest.get() || !*(dest.get())) {
138 log.error("signed SAML message missing Destination attribute");
139 throw BindingException("Signed SAML message missing Destination attribute identifying intended destination.");
141 else if (dest.get() && (!dest2 || !*dest2 || strcmp(dest.get(),dest2))) {
142 log.error("Redirect targeted at (%s), but delivered to (%s)", dest.get(), dest2 ? dest2 : "none");
143 throw BindingException("SAML message delivered with Redirect to incorrect server URL.");
146 return xmlObject.release();