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POConnecting to SAP Web Service from C# .NET application
 

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    <p>I've written a Windows Application to test a connection to a clients SAP web services. The web service call requires X509 certificate security.</p> <p>After reading various articles on the internet I've come up with three ways to attach the X509 certificate to the web service call. Unfortunately all of these attempts return a '401 Unauthorised Access'. However, I can connect to the web service via the URL in IE.</p> <p>Does anybody have any sugestions as to what I may be doing wrong? I am using WSE 3.0 and the three methods I am using to attach the certificate are as follows:-</p> <p>Certificate </p> <pre><code>X509Certificate2 oCert = GetSecurityCertificate(oCertificate); svc.ClientCertificates.Add(oCert); </code></pre> <p>Token </p> <pre><code>X509SecurityToken oToken = GetSecurityToken(oCertificate); svc.RequestSoapContext.Security.Tokens.Add(oToken); </code></pre> <p>Policy </p> <pre><code>SAPX509Assertion sapX509Assertion = new SAPX509Assertion(oCertificate, oStoreLocation, oStoreName, oFindType); svc.SetPolicy(sapX509Assertion.Policy()); </code></pre> <p>GetSecurityToken() and GetSecuirtyCertificate both search the certificate store. The SAPX509Assertion does this:-</p> <pre><code>public SAPX509Assertion(String certSubject, StoreLocation oStoreLocation, StoreName oStoreName, X509FindType oFindType) { ClientX509TokenProvider = new X509TokenProvider(oStoreLocation, oStoreName, certSubject, oFindType); ServiceX509TokenProvider = new X509TokenProvider(oStoreLocation, oStoreName, certSubject, oFindType); Protection.Request.EncryptBody = false; Protection.Response.EncryptBody = false; } </code></pre> <p><strong>Update</strong> OK, I have a WCF call now in place. I couldn't use the BasicHttpBinding method shown by Eugarps as it complained that I was connecting to a https address and expected http...which made sense. The code I now have is:-</p> <pre><code>var binding = new WSHttpBinding(); binding.MaxReceivedMessageSize = int.MaxValue; binding.Security.Transport.ClientCredentialType = HttpClientCredentialType.Windows; binding.Security.Mode = SecurityMode.Transport; WCFConnection.CreateAbsenceWSlow.ZWSDHTM_GB_AMS_CREATEABS_lowClient client; CreateAbsenceWSlow.ZfhhrGbbapiZgeeamsCreateabsResponse response; CreateAbsenceWSlow.ZfhhrGbbapiZgeeamsCreateabs data; //Assign address var address = new EndpointAddress(sUrl); //Create service client client = new CreateAbsenceWSlow.ZWSDHTM_GB_AMS_CREATEABS_lowClient(binding, address); //Assign credentials client.ClientCredentials.UserName.UserName = sUserName; client.ClientCredentials.UserName.Password = sPassword; response = new CreateAbsenceWSlow.ZfhhrGbbapiZgeeamsCreateabsResponse(); data = new WCFConnection.CreateAbsenceWSlow.ZfhhrGbbapiZgeeamsCreateabs(); response = client.ZfhhrGbbapiZgeeamsCreateabs(data); </code></pre> <p>It's still failing to connect to the SAP web service. The error I am receiving is "The HTTP request is unauthorized with client authentication scheme 'Negotiate'". I've also tried using </p> <pre><code>binding.Security.Transport.ClientCredentialType = HttpClientCredentialType.Basic; </code></pre> <p>which returned a similar error.</p> <p>Does anybody have any further suggestions or ideas of where I am going wrong?</p>
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