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(Go) Create IRS MeF Login Service Request MessageThis 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.
// This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // The goal of this example is to create signed SOAP XML such as the following: // IMPORTANT: The IRS's PDF documentation at https://www.irs.gov/pub/irs-utl/mef-doc-stp_ref_guide.pdf // contains a mistake in the section 4.1.1. Specifically, the Id="hdr" attribute is wrong. It must match the Reference in the ds:Signature, // which is why we changed it to "myHdr". // <?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" xmlns:ds="http://www.w3.org/2000/09/xmldsig#"> // <SOAP-ENV:Header> // <ns1:MeFHeader xmlns:ns1="http://www.irs.gov/a2a/mef/MeFHeader.xsd" Id="myHdr"> // <ns1:MessageID>001232006026123abcde</ns1:MessageID> // <ns1:Action>https://www.irs.gov/a2a/mef/Login/</ns1:Action> // <ns1:MessageTs>2006-09-27T08:55:29.348Z</ns1:MessageTs> // <ns1:ETIN>00123</ns1:ETIN> // <ns1:SessionKeyCd>Y</ns1:SessionKeyCd> // <ns1:TestCd>T</ns1:TestCd> // <ns1:AppSysID>username</ns1:AppSysID> // <ns1:WSDLVersionNum>10.0</ns1:WSDLVersionNum> // </ns1:MeFHeader> // <wsse:Security xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd"> // <wsse:BinarySecurityToken // ValueType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3" // EncodingType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary" // wsu:Id="X509Token">/CgBr+1CEl/PtYtAaMB0GA1UdDgQWBBSrtL3lSnDOzSluMLggQUgHpkDFGTAJBgNV HRMEAjAAMBkGCSqGSIb2fQdBAAQMMAobBFY1LjADAgMoMA0GCSqGSIb3DQEB BQUAA4GBAC6SVzmX2I2kr5f0Na83ujcSwixpzHE2LqLBFsKm0GdPdarHFB2Qt85zbQ9 PRCROObm9HCIO5KMCjHp7D4g+.0QVA36IbEn8</wsse:BinarySecurityToken> // <ds:Signature> // <ds:SignedInfo> // <ds:CanonicalizationMethod Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#" /> // <ds:SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1" /> // <ds:Reference URI="#myHdr"> // <ds:Transforms> // <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#" /> // </ds:Transforms> // <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" /> // <ds:DigestValue>qZk+NkcGgWq6PiVxeFDCbJzQ2J0=</ds:DigestValue> // </ds:Reference> // <ds:Reference URI="#myBody"> // <ds:Transforms> // <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#" /> // </ds:Transforms> // <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1" /> // <ds:DigestValue>hJg+RBw70m66rkqh+VEp5eVGcPE=</ds:DigestValue> // </ds:Reference> // </ds:SignedInfo> // <ds:SignatureValue>dsBeQ9qNXM1yU6BbWdBkSN676inwf+CgDORUKqOFuwWUzaOxUmHIq1Pb7uAB Yw6xkooLbQGS/M3t4Df+hd31prR9Pn9IFqG87Rt169+Il8L9GRgPhAATgne8Rh3jOaq nfrJ5BBM0VmbZdL+c7dfNcnpW13D/kltZMvlFRXR87Hs=</ds:SignatureValue> // <ds:KeyInfo> // <wsse:SecurityTokenReference> // <wsse:Reference URI="#X509Token" /> // </wsse:SecurityTokenReference> // </ds:KeyInfo> // </ds:Signature> // </wsse:Security> // </SOAP-ENV:Header> // <SOAP-ENV:Body ID="myBody"> // <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..) pfx := chilkat.NewPfx() success := pfx.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123") if success != true { fmt.Println(pfx.LastErrorText()) pfx.DisposePfx() return } // 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. signingCert := pfx.GetCert(0) if pfx.LastMethodSuccess() != true { fmt.Println(pfx.LastErrorText()) pfx.DisposePfx() return } bdCert := chilkat.NewBinData() signingCert.ExportCertDerBd(bdCert) sbCert64 := chilkat.NewStringBuilder() 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" xmlns:ds="http://www.w3.org/2000/09/xmldsig#"> // <SOAP-ENV:Header> // <ns1:MeFHeader xmlns:ns1="http://www.irs.gov/a2a/mef/MeFHeader.xsd" Id="myHdr"> // <ns1:MessageID>001232006026123abcde</ns1:MessageID> // <ns1:Action>https://www.irs.gov/a2a/mef/Login/</ns1:Action> // <ns1:MessageTs>2006-09-27T08:55:29.348Z</ns1:MessageTs> // <ns1:ETIN>00123</ns1:ETIN> // <ns1:SessionKeyCd>Y</ns1:SessionKeyCd> // <ns1:TestCd>T</ns1:TestCd> // <ns1:AppSysID>username</ns1:AppSysID> // <ns1:WSDLVersionNum>10.0</ns1:WSDLVersionNum> // </ns1:MeFHeader> // <wsse:Security xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd"> // <wsse:BinarySecurityToken // ValueType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3" // EncodingType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary" // wsu:Id="X509Token">/CgBr+1CEl/PtYtAaMB0GA1UdDgQWBBSrtL3lSnDOzSluMLggQUgHpkDFGTAJBgNV HRMEAjAAMBkGCSqGSIb2fQdBAAQMMAobBFY1LjADAgMoMA0GCSqGSIb3DQEB BQUAA4GBAC6SVzmX2I2kr5f0Na83ujcSwixpzHE2LqLBFsKm0GdPdarHFB2Qt85zbQ9 PRCROObm9HCIO5KMCjHp7D4g+.0QVA36IbEn8</wsse:BinarySecurityToken> // </wsse:Security> // </SOAP-ENV:Header> // <SOAP-ENV:Body ID="myBody"> // <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: xml := chilkat.NewXml() xml.SetTag("SOAP-ENV:Envelope") xml.AddAttribute("xmlns:SOAP-ENV","http://schemas.xmlsoap.org/soap/envelope/") xml.AddAttribute("xmlns:xsd","http://www.w3.org/2001/XMLSchema") xml.AddAttribute("xmlns:xsi","http://www.w3.org/2001/XMLSchema-instance") xml.AddAttribute("xmlns:ds","http://www.w3.org/2000/09/xmldsig#") xml.UpdateAttrAt("SOAP-ENV:Header|ns1:MeFHeader",true,"xmlns:ns1","http://www.irs.gov/a2a/mef/MeFHeader.xsd") xml.UpdateAttrAt("SOAP-ENV:Header|ns1:MeFHeader",true,"Id","myHdr") xml.UpdateChildContent("SOAP-ENV:Header|ns1:MeFHeader|ns1:MessageID","001232006026123abcde") xml.UpdateChildContent("SOAP-ENV:Header|ns1:MeFHeader|ns1:Action","https://www.irs.gov/a2a/mef/Login/") xml.UpdateChildContent("SOAP-ENV:Header|ns1:MeFHeader|ns1:MessageTs","2006-09-27T08:55:29.348Z") xml.UpdateChildContent("SOAP-ENV:Header|ns1:MeFHeader|ns1:ETIN","00123") xml.UpdateChildContent("SOAP-ENV:Header|ns1:MeFHeader|ns1:SessionKeyCd","Y") xml.UpdateChildContent("SOAP-ENV:Header|ns1:MeFHeader|ns1:TestCd","T") xml.UpdateChildContent("SOAP-ENV:Header|ns1:MeFHeader|ns1:AppSysID","username") xml.UpdateChildContent("SOAP-ENV:Header|ns1:MeFHeader|ns1:WSDLVersionNum","10.0") xml.UpdateAttrAt("SOAP-ENV:Header|wsse:Security",true,"xmlns:wsse","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd") xml.UpdateAttrAt("SOAP-ENV:Header|wsse:Security",true,"xmlns:wsu","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd") xml.UpdateAttrAt("SOAP-ENV:Header|wsse:Security|wsse:BinarySecurityToken",true,"ValueType","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3") xml.UpdateAttrAt("SOAP-ENV:Header|wsse:Security|wsse:BinarySecurityToken",true,"EncodingType","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-soap-message-security-1.0#Base64Binary") xml.UpdateAttrAt("SOAP-ENV:Header|wsse:Security|wsse:BinarySecurityToken",true,"wsu:Id","X509Token") xml.UpdateChildContent("SOAP-ENV:Header|wsse:Security|wsse:BinarySecurityToken",*sbCert64.GetAsString()) xml.UpdateAttrAt("SOAP-ENV:Body",true,"ID","myBody") xml.UpdateAttrAt("SOAP-ENV:Body|LoginRequest",true,"xmlns","http://www.irs.gov/a2a/mef/MeFMSIServices.xsd") // ------------------------------------------------------------------------------------------- // Setup the XML DSig generator object to create the desired signature. gen := chilkat.NewXmlDSigGen() // Indicate where the signature is to be placed. gen.SetSigLocation("SOAP-ENV:Envelope|SOAP-ENV:Header|wsse:Security") // Specify namespace prefix and algorithms. gen.SetSigNamespacePrefix("ds") gen.SetSignedInfoCanonAlg("EXCL_C14N") gen.SetSignedInfoDigestMethod("sha1") // Indicate what is to be signed.. success = gen.AddSameDocRef("myHdr","sha1","EXCL_C14N","","") success = gen.AddSameDocRef("myBody","sha1","EXCL_C14N","","") // We want the ds:Signature's KeyInfo to contain the following XML: // <wsse:SecurityTokenReference> // <wsse:Reference URI="#X509Token" /> // </wsse:SecurityTokenReference> // Create the above XML... xmlSecTokRef := chilkat.NewXml() xmlSecTokRef.SetTag("wsse:SecurityTokenReference") xmlSecTokRef.UpdateAttrAt("wsse:Reference",true,"URI","#X509Token") // Indicate that the KeyInfoType is "Custom" to allow us to provide the exact XML snippet that will go in KeyInfo. gen.SetKeyInfoType("Custom") xmlSecTokRef.SetEmitCompact(true) // Don't emit the XML declarator for this (it's important). xmlSecTokRef.SetEmitXmlDecl(false) gen.SetCustomKeyInfoXml(xmlSecTokRef.GetXml()) // Provide the certificate for signing. gen.SetX509Cert(signingCert,true) signingCert.DisposeCert() // ------------------------------------------------------------------------------------------- // OK.. everything is prepared to create the signed XML. // XML signatures are super-complicated, and one source of errors involves whitespace in XML, which must be // maintained exactly or else the signature becomes invalid. One way to help avoid such errors, // especially if the XML is intended for processing (i.e. not human eyes), is to sign compact XML // where no extra whitespace exists. Also, we can produce the XML signature on a single line. // Therefore, the entire signed XML is one line (except for the XML declarator), and we avoid // all potential problems relating to anything that migh muck with XML formatting or indentation. // Let's do that.. // First, get the XML to be signed in compact form (one line, no indenting or whitespace). xml.SetEmitCompact(true) sbLoginRequest := chilkat.NewStringBuilder() xml.GetXmlSb(sbLoginRequest) // Indicate we desire compact (single-line) signed XML. gen.SetBehaviors("CompactSignedXml") // Sign the XML. This adds the ds:Signature to the XML in sbLoginRequest. success = gen.CreateXmlDSigSb(sbLoginRequest) if success != true { fmt.Println(gen.LastErrorText()) pfx.DisposePfx() bdCert.DisposeBinData() sbCert64.DisposeStringBuilder() xml.DisposeXml() gen.DisposeXmlDSigGen() xmlSecTokRef.DisposeXml() sbLoginRequest.DisposeStringBuilder() return } // Show the result fmt.Println(*sbLoginRequest.GetAsString()) fmt.Println("----") // Alternatively, we can create a completely non-compact signature, fully indented.. sbLoginRequest.Clear() xml.SetEmitCompact(false) xml.GetXmlSb(sbLoginRequest) gen.SetBehaviors("IndentedSignature") success = gen.CreateXmlDSigSb(sbLoginRequest) fmt.Println(*sbLoginRequest.GetAsString()) pfx.DisposePfx() bdCert.DisposeBinData() sbCert64.DisposeStringBuilder() xml.DisposeXml() gen.DisposeXmlDSigGen() xmlSecTokRef.DisposeXml() sbLoginRequest.DisposeStringBuilder() |
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