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André-Claude Gendron · Oct 28

SOAP - Custom authentication when user/password is in Body

#Authentication #CSP #SOAP #InterSystems IRIS

I have to create a SOAP WebService that receives the username/password as part of a field in the Request. I have no control of the client's application.

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:tem="http://tempuri.org">
   <soapenv:Body>
      <tem:ProcessRequest>
         <!--Optional:-->
         <tem:myRequest>
            <tem:NomUtilisateur>ACGendron</tem:NomUtilisateur>
            <tem:MotDePasse>MyPassword</tem:MotDePasse>
            <!-- Other request fields -->
            <tem:PrenomMere>?</tem:PrenomMere>
            <tem:NumeroTelephone>?</tem:NumeroTelephone>
            <tem:CodeInstallation>1</tem:CodeInstallation>
         </tem:myRequest>
      </tem:ProcessRequest>
   </soapenv:Body>
</soapenv:Envelope>
...

I'm looking for advice on the best way to authenticate the user. I could verify that the user/password is correct using %session.Login(user, pass) in my WebMethod and throwing a SoapFault when this fails but I'm not sure it's the best way of doing things in my %SOAP.WebService. Perhaps there is a callback I can implement or any properties I should set (Username, UsernameToken, etc.) for the proper SOAP Service internal work

Any help is welcome,

Kind regards

Product version: IRIS 2020.1
$ZV: IRIS for UNIX (Red Hat Enterprise Linux for x86-64) 2020.1.1 (Build 408_0_21233U) Thu Oct 28 2021 15:14:45 EDT
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Discussion (3)1
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André-Claude Gendron · Nov 16

I ended-up creating a %CSP.Rest class that acts as a proxy which reordered the fields in order to generate a standard SOAP request with the proper headers. Works great for a minimum of code.

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Armin Gayl · Nov 18

Hi Andre-Claude, could you please explain your solution. I have a similar problem and could need a explination. Because i have also some troubles with the WS-Security...

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André-Claude Gendron · Nov 25

Here are a few code samples that could help : 

 

Class YourPackage.REST.CSoapAuthenticator Extends %CSP.REST
{

Parameter CONTENTTYPE = "text/xml";
XData UrlMap [ XMLNamespace = "http://www.intersystems.com/urlmap" ]
{
<Routes>
<Route Url="/:soapService" Method="POST" Call="PostSOAP"/>
</Routes>
}

ClassMethod PostSOAP(
    strSoapService As %String = "",
    test As %Integer = 0) As %Status
{
   #Dim %request As %CSP.Request
   #Dim %response As %CSP.Response
   #Dim httpClient As %Net.HttpRequest = ..GetLoopbackSOAPClient()
   do httpClient.EntityBody.Write(..UpdateSoapBody(%request.Content.Read($$$MaxStringLength)))
   do httpClient.SetHeader("SOAPAction", %request.SoapAction)
   do httpClient.Post($System.CSP.GetDefaultApp($Namespace) _ "/" _ strSoapService, test)

   set %response.ContentType = "text/xml"
   write httpClient.HttpResponse.Data.Read($$$MaxStringLength)

   return $$$OK
}

// -- Private utils --
ClassMethod GetLoopbackSOAPClient() As %Net.HttpRequest [ Private ]
{
   set httpClient = ##class(%Net.HttpRequest).%New()
   set httpClient.Server = ...
   set httpClient.Port = ...
   set httpClient.Timeout = 5
   set httpClient.Https = 1
   set httpClient.SSLConfiguration = ...
  
   return httpClient
}

ClassMethod UpdateSoapBody(strInput As %String) As %String [ Private ]
{
   #Dim strSoap As %String = ""
   #Dim username As %String = ... (Extract from Input)
   #Dim password As %String = ... (Extract from Input)
   
   set strSoap = strSoap _ ... (Copy soap enveloppe from input)
   set strSoap = strSoap _ " <soap:Header>" _ ..GenerateSecurityHeader(username, password) _ " </soap:Header>"
   set strSoap = strSoap _ " <soap:Body>"
   ... 
   set strSoap = strSoap _ " </soap:Body>"
   set strSoap = strSoap _ "</soap:Envelope>"
   return strSoap
}

ClassMethod GenerateSecurityHeader(
    strUsername As %String,
    strPassword As %String) As %String [ Private ]
{
   set header = ##class(%SOAP.Security.Header).%New()
   set usernameToken = ##class(%SOAP.Security.UsernameToken).Create(strUsername, strPassword)
   do header.AddSecurityElement(usernameToken)

   return ... (Use XML Writer to Output header to a String.)
}

}
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