saml/saml1/binding/impl/SAML1SOAPEncoder.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  * SAML1SOAPEncoder.cpp
  19  *
  20  * SAML 1.x 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 "saml1/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::saml1p;
  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 saml1p {
  46         class SAML_DLLLOCAL SAML1SOAPEncoder : public MessageEncoder
  47         {
  48         public:
  49             SAML1SOAPEncoder() {}
  50             virtual ~SAML1SOAPEncoder() {}
  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 SAML1SOAPEncoderFactory(const pair<const DOMElement*,const XMLCh*>& p)
  70         {
  71             return new SAML1SOAPEncoder();
  72         }
  73     };
  74 };
  75
  76 long SAML1SOAPEncoder::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.SAML1SOAP");
  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 Response.
 108     Response* response = dynamic_cast<Response*>(xmlObject);
 109     if (response) {
 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(response);
 116         xmlObject = env;
 117     }
 118
 119     // Now check for a full Envelope (which might have just been created).
 120     Envelope* env = dynamic_cast<Envelope*>(xmlObject);
 121     if (env) {
 122         if (!response) {
 123             response = (env->getBody() && env->getBody()->hasChildren()) ?
 124                 dynamic_cast<Response*>(env->getBody()->getUnknownXMLObjects().front()) : NULL;
 125         }
 126         try {
 127             // Now check for signing requirements.
 128             if (response && credential) {
 129                 if (response->getSignature()) {
 130                     log.debug("response already signed, skipping signature operation");
 131                     rootElement = env->marshall();
 132                 }
 133                 else {
 134                     log.debug("signing the response and marshalling the envelope");
 135
 136                     // Build a Signature.
 137                     Signature* sig = SignatureBuilder::buildSignature();
 138                     response->setSignature(sig);
 139                     if (signatureAlg)
 140                         sig->setSignatureAlgorithm(signatureAlg);
 141                     if (digestAlg) {
 142                         opensaml::ContentReference* cr = dynamic_cast<opensaml::ContentReference*>(sig->getContentReference());
 143                         if (cr)
 144                             cr->setDigestAlgorithm(digestAlg);
 145                     }
 146
 147                     // Sign message while marshalling.
 148                     vector<Signature*> sigs(1,sig);
 149                     rootElement = env->marshall((DOMDocument*)NULL,&sigs,credential);
 150                 }
 151             }
 152             else {
 153                 log.debug("marshalling the envelope");
 154                 rootElement = env->marshall();
 155             }
 156
 157             string xmlbuf;
 158             XMLHelper::serialize(rootElement, xmlbuf);
 159             istringstream s(xmlbuf);
 160             log.debug("sending serialized envelope");
 161             bool error = (!response && env->getBody() && env->getBody()->hasChildren() &&
 162                 dynamic_cast<Fault*>(env->getBody()->getUnknownXMLObjects().front()));
 163             long ret = error ? genericResponse.sendError(s) : genericResponse.sendResponse(s);
 164
 165             // Cleanup by destroying XML.
 166             delete env;
 167             return ret;
 168         }
 169         catch (XMLToolingException&) {
 170             if (response && detachOnFailure) {
 171                 // A bit weird...we have to "revert" things so that the response is isolated
 172                 // so the caller can free it.
 173                 if (response->getParent()) {
 174                     response->getParent()->detach();
 175                     response->detach();
 176                 }
 177             }
 178             throw;
 179         }
 180     }
 181
 182     Fault* fault = dynamic_cast<Fault*>(xmlObject);
 183     if (fault) {
 184         try {
 185             log.debug("building envelope and marshalling fault");
 186             Envelope* env = EnvelopeBuilder::buildEnvelope();
 187             Body* body = BodyBuilder::buildBody();
 188             env->setBody(body);
 189             body->getUnknownXMLObjects().push_back(fault);
 190             rootElement = env->marshall();
 191
 192             string xmlbuf;
 193             XMLHelper::serialize(rootElement, xmlbuf);
 194             istringstream s(xmlbuf);
 195             log.debug("sending serialized fault");
 196             long ret = genericResponse.sendError(s);
 197
 198             // Cleanup by destroying XML.
 199             delete env;
 200             return ret;
 201         }
 202         catch (XMLToolingException&) {
 203             // A bit weird...we have to "revert" things so that the fault is isolated
 204             // so the caller can free it.
 205             if (fault->getParent()) {
 206                 fault->getParent()->detach();
 207                 fault->detach();
 208             }
 209             throw;
 210         }
 211     }
 212
 213     throw BindingException("XML content for SAML 1.x SOAP Encoder must be a SAML 1.x <Response> or SOAP Fault/Envelope.");
 214 }