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/**
 * Licensed to the University Corporation for Advanced Internet
 * Development, Inc. (UCAID) under one or more contributor license
 * agreements. See the NOTICE file distributed with this work for
 * additional information regarding copyright ownership.
 *
 * UCAID licenses this file to you under the Apache License,
 * Version 2.0 (the "License"); you may not use this file except
 * in compliance with the License. You may obtain a copy of the
 * License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific
 * language governing permissions and limitations under the License.
 */

/**
 * @file saml/binding/SOAPClient.h
 * 
 * Specialized SOAPClient for SAML SOAP bindings.
 */

#ifndef __saml_soap11client_h__
#define __saml_soap11client_h__

#include <saml/base.h>

#include <xmltooling/soap/SOAPClient.h>

namespace opensaml {

    class SAML_API SecurityPolicy;
    namespace saml2md {
        class SAML_API MetadataCredentialCriteria;
    };

    /**
     * Specialized SOAPClient for SAML SOAP bindings.
     */
    class SAML_API SOAPClient : public soap11::SOAPClient
    {
    public:
        /**
         * Creates a SOAP client instance with a particular SecurityPolicy.
         * 
         * @param policy        reference to SecurityPolicy to apply
         */
        SOAPClient(SecurityPolicy& policy);
        
        virtual ~SOAPClient();

        /**
         * Controls whether to force transport/peer authentication via an X509TrustEngine.
         * 
         * <p>Only makes sense if an X509TrustEngine is supplied by the SecurityPolicy. 
         * 
         * @param force  true iff the client should refuse to communicate without this protection
         */
        void forceTransportAuthentication(bool force=true);
        
        using soap11::SOAPClient::send;

        /**
         * SAML-specific method uses metadata to determine the peer name and prepare the
         * transport layer with peer credential information. The SecurityPolicy is also reset,
         * in case the policy is reused.
         * 
         * @param env       SOAP envelope to send
         * @param from      identity of sending application
         * @param to        peer to send message to, expressed in metadata criteria terms
         * @param endpoint  URL of endpoint to recieve message
         */
        virtual void send(const soap11::Envelope& env, const char* from, saml2md::MetadataCredentialCriteria& to, const char* endpoint);
        
        /**
         * Override applies SecurityPolicy to envelope before returning it.
         * 
         * @return response envelope after SecurityPolicy has been applied
         */
        soap11::Envelope* receive();
        
        void reset();

        /**
         * Returns the SecurityPolicy supplied to the client.
         *
         * @return  the associated SecurityPolicy
         */
        SecurityPolicy& getPolicy() const;

    protected:
        /**
         * Override prepares transport by assigning an X509TrustEngine to it, if one is
         * attached to the policy.
         * 
         * @param transport reference to transport layer
         */
        void prepareTransport(xmltooling::SOAPTransport& transport);
        
        /** Reference to security policy to apply. */
        SecurityPolicy& m_policy;
        
        /** Flag controlling whether transport/peer authn is mandatory. */
        bool m_force;
    
        /** Metadata-based peer identity. */        
        const saml2md::RoleDescriptor* m_peer;

        /** Metadata-based CredentialCriteria for supplying credentials to TrustEngine. */
        saml2md::MetadataCredentialCriteria* m_criteria;
    };

};

#endif /* __saml_soap11client_h__ */