Merged issuer/protocol extraction back into rules.

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

diff --git a/saml/binding/impl/XMLSigningRule.cpp b/saml/binding/impl/XMLSigningRule.cpp
index 552cef8..d667cfd 100644 (file)
--- a/saml/binding/impl/XMLSigningRule.cpp
+++ b/saml/binding/impl/XMLSigningRule.cpp
@@ -23,7 +23,9 @@
 #include "internal.h"
 #include "exceptions.h"
 #include "binding/XMLSigningRule.h"
-#include "saml2/core/Assertions.h"
+#include "saml1/core/Assertions.h"
+#include "saml1/core/Protocols.h"
+#include "saml2/core/Protocols.h"
 #include "saml2/metadata/Metadata.h"
 #include "saml2/metadata/MetadataProvider.h"
 #include "security/TrustEngine.h"
@@ -50,8 +52,7 @@ pair<saml2::Issuer*,const RoleDescriptor*> XMLSigningRule::evaluate(
     const XMLObject& message,
     const MetadataProvider* metadataProvider,
     const QName* role,
-    const opensaml::TrustEngine* trustEngine,
-    const MessageExtractor& extractor
+    const opensaml::TrustEngine* trustEngine
     ) const
 {
     Category& log=Category::getInstance(SAML_LOGCAT".SecurityPolicyRule.XMLSigning");
@@ -65,14 +66,14 @@ pair<saml2::Issuer*,const RoleDescriptor*> XMLSigningRule::evaluate(
     }
     
     try {
-        const RootObject& root = dynamic_cast<const RootObject&>(message);
-        if (!root.getSignature()) {
-            log.debug("ignoring unsigned message");
+        const SignableObject* signable = dynamic_cast<const SignableObject*>(&message);
+        if (!signable || !signable->getSignature()) {
+            log.debug("ignoring unsigned or unrecognized message");
             return ret;
         }
         
         log.debug("extracting issuer from message");
-        pair<saml2::Issuer*,const XMLCh*> issuerInfo = extractor.getIssuerAndProtocol(message);
+        pair<saml2::Issuer*,const XMLCh*> issuerInfo = getIssuerAndProtocol(message);
         
         auto_ptr<saml2::Issuer> issuer(issuerInfo.first);
         if (!issuerInfo.first || !issuerInfo.second ||
@@ -96,7 +97,7 @@ pair<saml2::Issuer*,const RoleDescriptor*> XMLSigningRule::evaluate(
             return ret;
         }
 
-        if (!trustEngine->validate(*(root.getSignature()), *roledesc, metadataProvider->getKeyResolver())) {
+        if (!trustEngine->validate(*(signable->getSignature()), *roledesc, metadataProvider->getKeyResolver())) {
             log.error("unable to verify signature on message with supplied trust engine");
             return ret;
         }
@@ -115,3 +116,48 @@ pair<saml2::Issuer*,const RoleDescriptor*> XMLSigningRule::evaluate(
     }
     return ret;
 }
+
+pair<saml2::Issuer*,const XMLCh*> XMLSigningRule::getIssuerAndProtocol(const XMLObject& message) const
+{
+    // We just let any bad casts throw here.
+    
+    saml2::Issuer* issuer;
+
+    // Shortcuts some of the casting.
+    const XMLCh* ns = message.getElementQName().getNamespaceURI();
+    if (ns) {
+        if (XMLString::equals(ns, samlconstants::SAML20P_NS) || XMLString::equals(ns, samlconstants::SAML20_NS)) {
+            // 2.0 namespace should be castable to a specialized 2.0 root.
+            const saml2::RootObject& root = dynamic_cast<const saml2::RootObject&>(message);
+            issuer = root.getIssuer();
+            if (issuer && issuer->getName()) {
+                return make_pair(issuer->cloneIssuer(), samlconstants::SAML20P_NS);
+            }
+            
+            // No issuer in the message, so we have to try the Response approach. 
+            const vector<saml2::Assertion*>& assertions = dynamic_cast<const saml2p::Response&>(message).getAssertions();
+            if (!assertions.empty()) {
+                issuer = assertions.front()->getIssuer();
+                if (issuer && issuer->getName())
+                    return make_pair(issuer->cloneIssuer(), samlconstants::SAML20P_NS);
+            }
+        }
+        else if (XMLString::equals(ns, samlconstants::SAML1P_NS)) {
+            // Should be a samlp:Response, at least in OpenSAML.
+            const vector<saml1::Assertion*>& assertions = dynamic_cast<const saml1p::Response&>(message).getAssertions();
+            if (!assertions.empty()) {
+                const saml1::Assertion* a = assertions.front();
+                if (a->getIssuer()) {
+                    issuer = saml2::IssuerBuilder::buildIssuer();
+                    issuer->setName(a->getIssuer());
+                    pair<bool,int> minor = a->getMinorVersion();
+                    return make_pair(
+                        issuer,
+                        (minor.first && minor.second==0) ? samlconstants::SAML10_PROTOCOL_ENUM : samlconstants::SAML11_PROTOCOL_ENUM
+                        );
+                }
+            }
+        }
+    }
+    return pair<saml2::Issuer*,const XMLCh*>(NULL,NULL);
+}