saml/saml2/binding/impl/SAML2SOAPEncoder.cpp

   1 /*
   2  *  Copyright 2001-2007 Internet2
   3  *
   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
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  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.
  15  */
  16
  17 /**
  18  * SAML2SOAPEncoder.cpp
  19  *
  20  * SAML 2.0 SOAP binding message encoder
  21  */
  22
  23 #include "internal.h"
  24 #include "exceptions.h"
  25 #include "binding/MessageEncoder.h"
  26 #include "signature/ContentReference.h"
  27 #include "saml2/core/Protocols.h"
  28
  29 #include <sstream>
  30 #include <xmltooling/logging.h>
  31 #include <xmltooling/io/HTTPResponse.h>
  32 #include <xmltooling/util/NDC.h>
  33 #include <xmltooling/soap/SOAP.h>
  34
  35 using namespace opensaml::saml2p;
  36 using namespace opensaml::saml2md;
  37 using namespace opensaml;
  38 using namespace xmlsignature;
  39 using namespace soap11;
  40 using namespace xmltooling::logging;
  41 using namespace xmltooling;
  42 using namespace std;
  43
  44 namespace opensaml {
  45     namespace saml2p {
  46         class SAML_DLLLOCAL SAML2SOAPEncoder : public MessageEncoder
  47         {
  48         public:
  49             SAML2SOAPEncoder() {}
  50             virtual ~SAML2SOAPEncoder() {}
  51
  52             bool isUserAgentPresent() const {
  53                 return false;
  54             }
  55
  56             long encode(
  57                 GenericResponse& genericResponse,
  58                 XMLObject* xmlObject,
  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
  66                 ) const;
  67         };
  68
  69         MessageEncoder* SAML_DLLLOCAL SAML2SOAPEncoderFactory(const pair<const DOMElement*,const XMLCh*>& p)
  70         {
  71             return new SAML2SOAPEncoder();
  72         }
  73     };
  74 };
  75
  76 long SAML2SOAPEncoder::encode(
  77     GenericResponse& genericResponse,
  78     XMLObject* xmlObject,
  79     const char* destination,
  80     const EntityDescriptor* recipient,
  81     const char* relayState,
  82     const ArtifactGenerator* artifactGenerator,
  83     const Credential* credential,
  84     const XMLCh* signatureAlg,
  85     const XMLCh* digestAlg
  86     ) const
  87 {
  88 #ifdef _DEBUG
  89     xmltooling::NDC ndc("encode");
  90 #endif
  91     Category& log = Category::getInstance(SAML_LOGCAT".MessageEncoder.SAML2SOAP");
  92
  93     log.debug("validating input");
  94     if (xmlObject->getParent())
  95         throw BindingException("Cannot encode XML content with parent.");
  96
  97     genericResponse.setContentType("text/xml");
  98     HTTPResponse* httpResponse = dynamic_cast<HTTPResponse*>(&genericResponse);
  99     if (httpResponse) {
 100         httpResponse->setResponseHeader("Cache-Control", "no-cache, no-store, must-revalidate, private");
 101         httpResponse->setResponseHeader("Pragma", "no-cache");
 102     }
 103
 104     bool detachOnFailure = false;
 105     DOMElement* rootElement = NULL;
 106
 107     // Check for a naked message.
 108     SignableObject* msg = dynamic_cast<SignableObject*>(xmlObject);
 109     if (msg) {
 110         // Wrap it in a SOAP envelope and point xmlObject at that.
 111         detachOnFailure = true;
 112         Envelope* env = EnvelopeBuilder::buildEnvelope();
 113         Body* body = BodyBuilder::buildBody();
 114         env->setBody(body);
 115         body->getUnknownXMLObjects().push_back(msg);
 116         xmlObject = env;
 117     }
 118
 119     Envelope* env = dynamic_cast<Envelope*>(xmlObject);
 120     if (env) {
 121         if (!msg) {
 122             msg = (env->getBody() && env->getBody()->hasChildren()) ?
 123                 dynamic_cast<SignableObject*>(env->getBody()->getUnknownXMLObjects().front()) : NULL;
 124         }
 125         try {
 126             if (msg && credential) {
 127                 if (msg->getSignature()) {
 128                     log.debug("message already signed, skipping signature operation");
 129                     rootElement = env->marshall();
 130                 }
 131                 else {
 132                     log.debug("signing the message and marshalling the envelope");
 133
 134                     // Build a Signature.
 135                     Signature* sig = SignatureBuilder::buildSignature();
 136                     msg->setSignature(sig);
 137                     if (signatureAlg)
 138                         sig->setSignatureAlgorithm(signatureAlg);
 139                     if (digestAlg) {
 140                         opensaml::ContentReference* cr = dynamic_cast<opensaml::ContentReference*>(sig->getContentReference());
 141                         if (cr)
 142                             cr->setDigestAlgorithm(digestAlg);
 143                     }
 144
 145                     // Sign message while marshalling.
 146                     vector<Signature*> sigs(1,sig);
 147                     rootElement = env->marshall((DOMDocument*)NULL,&sigs,credential);
 148                 }
 149             }
 150             else {
 151                 log.debug("marshalling the envelope");
 152                 rootElement = env->marshall();
 153             }
 154
 155             string xmlbuf;
 156             XMLHelper::serialize(rootElement, xmlbuf);
 157             istringstream s(xmlbuf);
 158             log.debug("sending serialized envelope");
 159             bool error = (!msg && env->getBody() && env->getBody()->hasChildren() &&
 160                 dynamic_cast<Fault*>(env->getBody()->getUnknownXMLObjects().front()));
 161             long ret = error ? genericResponse.sendError(s) : genericResponse.sendResponse(s);
 162
 163             // Cleanup by destroying XML.
 164             delete env;
 165             return ret;
 166         }
 167         catch (XMLToolingException&) {
 168             if (msg && detachOnFailure) {
 169                 // A bit weird...we have to "revert" things so that the message is isolated
 170                 // so the caller can free it.
 171                 if (msg->getParent()) {
 172                     msg->getParent()->detach();
 173                     msg->detach();
 174                 }
 175             }
 176             throw;
 177         }
 178     }
 179
 180     Fault* fault = dynamic_cast<Fault*>(xmlObject);
 181     if (fault) {
 182         try {
 183             log.debug("building envelope and marshalling fault");
 184             Envelope* env = EnvelopeBuilder::buildEnvelope();
 185             Body* body = BodyBuilder::buildBody();
 186             env->setBody(body);
 187             body->getUnknownXMLObjects().push_back(fault);
 188             rootElement = env->marshall();
 189
 190             string xmlbuf;
 191             XMLHelper::serialize(rootElement, xmlbuf);
 192             istringstream s(xmlbuf);
 193             log.debug("sending serialized fault");
 194             long ret = genericResponse.sendError(s);
 195
 196             // Cleanup by destroying XML.
 197             delete env;
 198             return ret;
 199         }
 200         catch (XMLToolingException&) {
 201             // A bit weird...we have to "revert" things so that the fault is isolated
 202             // so the caller can free it.
 203             if (fault->getParent()) {
 204                 fault->getParent()->detach();
 205                 fault->detach();
 206             }
 207             throw;
 208         }
 209     }
 210
 211     throw BindingException("XML content for SAML 2.0 SOAP Encoder must be a SAML 2.0 message or SOAP Fault/Envelope.");
 212 }