Major revamp of credential and trust handling code, PKIX engine still needs work.

[shibboleth/cpp-opensaml.git] / saml / saml2 / binding / impl / SAML2ArtifactEncoder.cpp

diff --git a/saml/saml2/binding/impl/SAML2ArtifactEncoder.cpp b/saml/saml2/binding/impl/SAML2ArtifactEncoder.cpp
index 386b07c..5d31808 100644 (file)
--- a/saml/saml2/binding/impl/SAML2ArtifactEncoder.cpp
+++ b/saml/saml2/binding/impl/SAML2ArtifactEncoder.cpp
@@ -1,5 +1,5 @@
 /*
- *  Copyright 2001-2006 Internet2
+ *  Copyright 2001-2007 Internet2
  * 
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,12 +22,18 @@
 
 #include "internal.h"
 #include "exceptions.h"
+#include "binding/ArtifactMap.h"
+#include "binding/HTTPResponse.h"
+#include "binding/MessageEncoder.h"
 #include "saml2/binding/SAML2Artifact.h"
-#include "saml2/binding/SAML2ArtifactEncoder.h"
 #include "saml2/core/Protocols.h"
 
+#include <fstream>
+#include <sstream>
 #include <log4cpp/Category.hh>
 #include <xmltooling/util/NDC.h>
+#include <xmltooling/util/TemplateEngine.h>
+#include <xmltooling/util/URLEncoder.h>
 
 using namespace opensaml::saml2p;
 using namespace opensaml;
@@ -38,6 +44,26 @@ using namespace std;
 
 namespace opensaml {
     namespace saml2p {              
+        class SAML_DLLLOCAL SAML2ArtifactEncoder : public MessageEncoder
+        {
+        public:
+            SAML2ArtifactEncoder(const DOMElement* e);
+            virtual ~SAML2ArtifactEncoder() {}
+            
+            long encode(
+                GenericResponse& genericResponse,
+                XMLObject* xmlObject,
+                const char* destination,
+                const char* recipientID=NULL,
+                const char* relayState=NULL,
+                const Credential* credential=NULL,
+                const XMLCh* sigAlgorithm=NULL
+                ) const;
+        
+        private:
+            string m_template; 
+        };
+
         MessageEncoder* SAML_DLLLOCAL SAML2ArtifactEncoderFactory(const DOMElement* const & e)
         {
             return new SAML2ArtifactEncoder(e);
@@ -45,16 +71,24 @@ namespace opensaml {
     };
 };
 
-SAML2ArtifactEncoder::SAML2ArtifactEncoder(const DOMElement* e) {}
+static const XMLCh _template[] = UNICODE_LITERAL_8(t,e,m,p,l,a,t,e);
 
-SAML2ArtifactEncoder::~SAML2ArtifactEncoder() {}
+SAML2ArtifactEncoder::SAML2ArtifactEncoder(const DOMElement* e)
+{
+    if (e) {
+        auto_ptr_char t(e->getAttributeNS(NULL, _template));
+        if (t.get())
+            m_template = t.get();
+    }
+}
 
-void SAML2ArtifactEncoder::encode(
-    map<string,string>& outputFields,
+long SAML2ArtifactEncoder::encode(
+    GenericResponse& genericResponse,
     XMLObject* xmlObject,
+    const char* destination,
     const char* recipientID,
     const char* relayState,
-    const CredentialResolver* credResolver,
+    const Credential* credential,
     const XMLCh* sigAlgorithm
     ) const
 {
@@ -62,9 +96,14 @@ void SAML2ArtifactEncoder::encode(
     xmltooling::NDC ndc("encode");
 #endif
     Category& log = Category::getInstance(SAML_LOGCAT".MessageEncoder.SAML2Artifact");
+
     log.debug("validating input");
+    HTTPResponse* httpResponse=dynamic_cast<HTTPResponse*>(&genericResponse);
+    if (!httpResponse)
+        throw BindingException("Unable to cast response interface to HTTPResponse type.");
+    if (relayState && strlen(relayState)>80)
+        throw BindingException("RelayState cannot exceed 80 bytes in length.");
     
-    outputFields.clear();
     if (xmlObject->getParent())
         throw BindingException("Cannot encode XML content with parent.");
 
@@ -85,7 +124,7 @@ void SAML2ArtifactEncoder::encode(
     log.debug("obtaining new artifact for relying party (%s)", recipientID ? recipientID : "unknown");
     auto_ptr<SAMLArtifact> artifact(m_artifactGenerator->generateSAML2Artifact(recipientID));
 
-    if (credResolver) {
+    if (credential) {
         // Signature based on native XML signing.
         if (request ? request->getSignature() : response->getSignature()) {
             log.debug("message already signed, skipping signature operation");
@@ -94,25 +133,49 @@ void SAML2ArtifactEncoder::encode(
             log.debug("signing the message");
 
             // Build a Signature.
-            Signature* sig = buildSignature(credResolver, sigAlgorithm);
-            
-            // Append Signature.
+            Signature* sig = SignatureBuilder::buildSignature();
             request ? request->setSignature(sig) : response->setSignature(sig);    
-        
+            if (sigAlgorithm)
+                sig->setSignatureAlgorithm(sigAlgorithm);
+            
             // Sign response while marshalling.
             vector<Signature*> sigs(1,sig);
-            xmlObject->marshall((DOMDocument*)NULL,&sigs);
+            xmlObject->marshall((DOMDocument*)NULL,&sigs,credential);
         }
     }
     
-    // Pass back output fields.
-    outputFields["SAMLart"] = artifact->encode();
-    if (relayState)
-        outputFields["RelayState"] = relayState;
-
     // Store the message. Last step in storage will be to delete the XML.
     log.debug("storing artifact and content in map");
     mapper->storeContent(xmlObject, artifact.get(), recipientID);
 
-    log.debug("message encoded");
+    if (m_template.empty()) {
+        // Generate redirect.
+        string loc = destination;
+        loc += (strchr(destination,'?') ? '&' : '?');
+        const URLEncoder* escaper = XMLToolingConfig::getConfig().getURLEncoder();
+        loc = loc + "SAMLart=" + escaper->encode(artifact->encode().c_str());
+        if (relayState)
+            loc = loc + "&RelayState=" + escaper->encode(relayState);
+        log.debug("message encoded, sending redirect to client");
+        return httpResponse->sendRedirect(loc.c_str());
+    }
+    else {
+        // Push message into template and send result to client. 
+        log.debug("message encoded, sending HTML form template to client");
+        TemplateEngine* engine = XMLToolingConfig::getConfig().getTemplateEngine();
+        if (!engine)
+            throw BindingException("Encoding artifact using POST requires a TemplateEngine instance.");
+        ifstream infile(m_template.c_str());
+        if (!infile)
+            throw BindingException("Failed to open HTML template for POST response ($1).", params(1,m_template.c_str()));
+        TemplateEngine::TemplateParameters params;
+        params.m_map["action"] = destination;
+        params.m_map["SAMLart"] = artifact->encode();
+        if (relayState)
+            params.m_map["RelayState"] = relayState;
+        stringstream s;
+        engine->run(infile, s, params);
+        httpResponse->setContentType("text/html");
+        return httpResponse->sendResponse(s);
+    }
 }