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(Visual Basic 6.0) Create IRS MeF Login Service Request Message

This example demonstrates how to create a digitally signed Login Service Request Message.

This example used the documentation at https://www.irs.gov/pub/irs-utl/mef-doc-stp_ref_guide.pdf as a guide.

It creates signed XML as specified in section 4.1.1 found in Section 4: Example A2A Web Service Messages.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

' --------------------------------------------------------------------------------
' Also see Chilkat's Online WSDL Code Generator
' to generate code and SOAP Request and Response XML for each operation in a WSDL.
' --------------------------------------------------------------------------------

' The goal of this example is to create signed SOAP XML such as the following:

' <?xml version="1.0" encoding="UTF-8"?>
' <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
'     <SOAP-ENV:Header>
'         <wsse:Security xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">
'             <wsse:BinarySecurityToken 
' 		xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd"
' 		EncodingType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary"
' 		ValueType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3"
' 		wsu:Id="CertId-1673181727">MIIHab...n71P</wsse:BinarySecurityToken>
'             <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
'                 <ds:SignedInfo>
'                     <ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
'                     <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/>
'                     <ds:Reference URI="#id-1214941501">
'                         <ds:Transforms>
'                             <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
'                         </ds:Transforms>
'                         <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
'                         <ds:DigestValue>abcdefghijkLMNOPQRSTUVwxyz012345Em0o3VEOTck=</ds:DigestValue>
'                     </ds:Reference>
'                     <ds:Reference URI="#id-1871558655">
'                         <ds:Transforms>
'                             <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
'                         </ds:Transforms>
'                         <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
'                         <ds:DigestValue>abcdefghijkLMNOPQRSTUVwxyz012345Xm5ViA+royg=</ds:DigestValue>
'                     </ds:Reference>
'                 </ds:SignedInfo>
'                 <ds:SignatureValue>abcd...5Nbw==</ds:SignatureValue>
'                 <ds:KeyInfo Id="KeyId-256137097">
'                     <wsse:SecurityTokenReference xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="STRId-1862925355">
'                         <wsse:Reference URI="#CertId-1673181727" ValueType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3"/>
'                     </wsse:SecurityTokenReference>
'                 </ds:KeyInfo>
'             </ds:Signature>
'         </wsse:Security>
'         <ns1:MeFHeader xmlns:ns1="http://www.irs.gov/a2a/mef/MeFHeader.xsd" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="id-1214941501">
'             <ns1:MessageID>12345202018200000234</ns1:MessageID>
'             <ns1:Action>Login</ns1:Action>
'             <ns1:MessageTs>2020-06-30T15:25:42.678Z</ns1:MessageTs>
'             <ns1:ETIN>12345</ns1:ETIN>
'             <ns1:SessionKeyCd>Y</ns1:SessionKeyCd>
'             <ns1:TestCd>P</ns1:TestCd>
'             <ns1:AppSysID>65432190</ns1:AppSysID>
'             <ns1:WSDLVersionNum>10.3</ns1:WSDLVersionNum>
'             <ns1:ClientSoftwareTxt>SOATest</ns1:ClientSoftwareTxt>
'         </ns1:MeFHeader>
'     </SOAP-ENV:Header>
'     <SOAP-ENV:Body xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="id-1871558655">
'         <LoginRequest xmlns="http://www.irs.gov/a2a/mef/MeFMSIServices.xsd"/>
'     </SOAP-ENV:Body>
' </SOAP-ENV:Envelope>

' -------------------------------------------------------------------------------------------

' First, let's load the certificate + private key to be used for signing (from a PFX).
' (It is also possible to use certificates installed on a Windows system, or from other file formats..)
Dim pfx As New ChilkatPfx
Dim success As Long
success = pfx.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123")
If (success <> 1) Then
    Debug.Print pfx.LastErrorText
    Exit Sub
End If

' We'll be needing the X.509 signing cert as base64 for the BinarySecurityToken, so let's get it now..
' The certificate having the private key should be the 1st in the PFX.
Dim signingCert As ChilkatCert
Set signingCert = pfx.GetCert(0)
If (pfx.LastMethodSuccess <> 1) Then
    Debug.Print pfx.LastErrorText
    Exit Sub
End If

Dim bdCert As New ChilkatBinData
success = signingCert.ExportCertDerBd(bdCert)
Dim sbCert64 As New ChilkatStringBuilder
success = bdCert.GetEncodedSb("base64",sbCert64)

' -------------------------------------------------------------------------------------------
' The XML before signing would look like this:

' <?xml version="1.0" encoding="UTF-8"?>
' <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
'     <SOAP-ENV:Header>
'         <wsse:Security xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">
'             <wsse:BinarySecurityToken 
' 		xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd"
' 		EncodingType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary"
' 		ValueType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3"
' 		wsu:Id="CertId-1673181727">MIIHab...n71P</wsse:BinarySecurityToken>
'         </wsse:Security>
'         <ns1:MeFHeader xmlns:ns1="http://www.irs.gov/a2a/mef/MeFHeader.xsd" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="id-1214941501">
'             <ns1:MessageID>12345202018200000234</ns1:MessageID>
'             <ns1:Action>Login</ns1:Action>
'             <ns1:MessageTs>2020-06-30T15:25:42.678Z</ns1:MessageTs>
'             <ns1:ETIN>12345</ns1:ETIN>
'             <ns1:SessionKeyCd>Y</ns1:SessionKeyCd>
'             <ns1:TestCd>P</ns1:TestCd>
'             <ns1:AppSysID>65432190</ns1:AppSysID>
'             <ns1:WSDLVersionNum>10.3</ns1:WSDLVersionNum>
'             <ns1:ClientSoftwareTxt>SOATest</ns1:ClientSoftwareTxt>
'         </ns1:MeFHeader>
'     </SOAP-ENV:Header>
'     <SOAP-ENV:Body xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd" wsu:Id="id-1871558655">
'         <LoginRequest xmlns="http://www.irs.gov/a2a/mef/MeFMSIServices.xsd"/>
'     </SOAP-ENV:Body>
' </SOAP-ENV:Envelope>

' You can use the online XML code generation tool at http://tools.chilkat.io/xmlCreate.cshtml
' to generate the following XML creation source code:

' Create the XML to be signed...
Dim xmlToSign As New ChilkatXml
xmlToSign.Tag = "SOAP-ENV:Envelope"
success = xmlToSign.AddAttribute("xmlns:SOAP-ENV","http://schemas.xmlsoap.org/soap/envelope/")
success = xmlToSign.AddAttribute("xmlns:xsd","http://www.w3.org/2001/XMLSchema")
success = xmlToSign.AddAttribute("xmlns:xsi","http://www.w3.org/2001/XMLSchema-instance")
success = xmlToSign.UpdateAttrAt("SOAP-ENV:Header|wsse:Security",1,"xmlns:wsse","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd")
success = xmlToSign.UpdateAttrAt("SOAP-ENV:Header|wsse:Security|wsse:BinarySecurityToken",1,"xmlns:wsu","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd")
success = xmlToSign.UpdateAttrAt("SOAP-ENV:Header|wsse:Security|wsse:BinarySecurityToken",1,"EncodingType","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary")
success = xmlToSign.UpdateAttrAt("SOAP-ENV:Header|wsse:Security|wsse:BinarySecurityToken",1,"ValueType","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3")
success = xmlToSign.UpdateAttrAt("SOAP-ENV:Header|wsse:Security|wsse:BinarySecurityToken",1,"wsu:Id","CertId-1673181727")
xmlToSign.UpdateChildContent "SOAP-ENV:Header|wsse:Security|wsse:BinarySecurityToken",sbCert64.GetAsString()
success = xmlToSign.UpdateAttrAt("SOAP-ENV:Header|ns1:MeFHeader",1,"xmlns:ns1","http://www.irs.gov/a2a/mef/MeFHeader.xsd")
success = xmlToSign.UpdateAttrAt("SOAP-ENV:Header|ns1:MeFHeader",1,"xmlns:wsu","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd")
success = xmlToSign.UpdateAttrAt("SOAP-ENV:Header|ns1:MeFHeader",1,"wsu:Id","id-1214941501")
xmlToSign.UpdateChildContent "SOAP-ENV:Header|ns1:MeFHeader|ns1:MessageID","12345202018200000234"
xmlToSign.UpdateChildContent "SOAP-ENV:Header|ns1:MeFHeader|ns1:Action","Login"
xmlToSign.UpdateChildContent "SOAP-ENV:Header|ns1:MeFHeader|ns1:MessageTs","2020-06-30T15:25:42.678Z"
xmlToSign.UpdateChildContentInt "SOAP-ENV:Header|ns1:MeFHeader|ns1:ETIN",12345
xmlToSign.UpdateChildContent "SOAP-ENV:Header|ns1:MeFHeader|ns1:SessionKeyCd","Y"
xmlToSign.UpdateChildContent "SOAP-ENV:Header|ns1:MeFHeader|ns1:TestCd","P"
xmlToSign.UpdateChildContentInt "SOAP-ENV:Header|ns1:MeFHeader|ns1:AppSysID",65432190
xmlToSign.UpdateChildContent "SOAP-ENV:Header|ns1:MeFHeader|ns1:WSDLVersionNum","10.3"
xmlToSign.UpdateChildContent "SOAP-ENV:Header|ns1:MeFHeader|ns1:ClientSoftwareTxt","SOATest"
success = xmlToSign.UpdateAttrAt("SOAP-ENV:Body",1,"xmlns:wsu","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd")
success = xmlToSign.UpdateAttrAt("SOAP-ENV:Body",1,"wsu:Id","id-1871558655")
success = xmlToSign.UpdateAttrAt("SOAP-ENV:Body|LoginRequest",1,"xmlns","http://www.irs.gov/a2a/mef/MeFMSIServices.xsd")

' -------------------------------------------------------------------------------------------
' Setup the XML DSig generator object to create the desired signature.

Dim gen As New ChilkatXmlDSigGen

gen.SigLocation = "SOAP-ENV:Envelope|SOAP-ENV:Header|wsse:Security"
gen.SigLocationMod = 0
gen.SigNamespacePrefix = "ds"
gen.SigNamespaceUri = "http://www.w3.org/2000/09/xmldsig#"
gen.SignedInfoCanonAlg = "EXCL_C14N"
gen.SignedInfoDigestMethod = "sha256"

' Set the KeyInfoId before adding references..
gen.KeyInfoId = "KeyId-256137097"

' -------- Reference 1 --------
success = gen.AddSameDocRef("id-1214941501","sha256","EXCL_C14N","","")

' -------- Reference 2 --------
success = gen.AddSameDocRef("id-1871558655","sha256","EXCL_C14N","","")

' Provide a certificate + private key. (PFX password is test123)
Dim cert As New ChilkatCert
success = cert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123")
If (success <> 1) Then
    Debug.Print cert.LastErrorText
    Exit Sub
End If

success = gen.SetX509Cert(cert,1)

gen.KeyInfoType = "Custom"

' Create the custom KeyInfo XML..
Dim xmlCustomKeyInfo As New ChilkatXml
xmlCustomKeyInfo.Tag = "wsse:SecurityTokenReference"
success = xmlCustomKeyInfo.AddAttribute("xmlns:wsu","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd")
success = xmlCustomKeyInfo.AddAttribute("wsu:Id","STRId-1862925355")
success = xmlCustomKeyInfo.UpdateAttrAt("wsse:Reference",1,"URI","#CertId-1673181727")
success = xmlCustomKeyInfo.UpdateAttrAt("wsse:Reference",1,"ValueType","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3")

xmlCustomKeyInfo.EmitXmlDecl = 0
gen.CustomKeyInfoXml = xmlCustomKeyInfo.GetXml()

' -------------------------------------------------------------------------------------------
' Load XML to be signed...
Dim sbXml As New ChilkatStringBuilder
success = xmlToSign.GetXmlSb(sbXml)

' Update BinarySecurityToken_Base64Binary_Content with the actual X509 of the signing cert.
Dim nReplaced As Long
nReplaced = sbXml.Replace("BinarySecurityToken_Base64Binary_Content",cert.GetEncoded())

gen.Behaviors = "IndentedSignature"

' Sign the XML...
success = gen.CreateXmlDSigSb(sbXml)
If (success <> 1) Then
    Debug.Print gen.LastErrorText
    Exit Sub
End If

' -----------------------------------------------

' Save the signed XML to a file.
success = sbXml.WriteFile("c:/temp/qa_output/signedXml.xml","utf-8",0)

Debug.Print sbXml.GetAsString()

 

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