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(C) 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.

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#include <C_CkPfx.h>
#include <C_CkCert.h>
#include <C_CkBinData.h>
#include <C_CkStringBuilder.h>
#include <C_CkXml.h>
#include <C_CkXmlDSigGen.h>

void ChilkatSample(void)
    {
    HCkPfx pfx;
    BOOL success;
    HCkCert signingCert;
    HCkBinData bdCert;
    HCkStringBuilder sbCert64;
    HCkXml xmlToSign;
    HCkXmlDSigGen gen;
    HCkCert cert;
    HCkXml xmlCustomKeyInfo;
    HCkStringBuilder sbXml;
    int nReplaced;

    // 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..)
    pfx = CkPfx_Create();
    success = CkPfx_LoadPfxFile(pfx,"qa_data/pfx/cert_test123.pfx","test123");
    if (success != TRUE) {
        printf("%s\n",CkPfx_lastErrorText(pfx));
        CkPfx_Dispose(pfx);
        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 = CkPfx_GetCert(pfx,0);
    if (CkPfx_getLastMethodSuccess(pfx) != TRUE) {
        printf("%s\n",CkPfx_lastErrorText(pfx));
        CkPfx_Dispose(pfx);
        return;
    }

    bdCert = CkBinData_Create();
    CkCert_ExportCertDerBd(signingCert,bdCert);
    sbCert64 = CkStringBuilder_Create();
    CkBinData_GetEncodedSb(bdCert,"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...
    xmlToSign = CkXml_Create();
    CkXml_putTag(xmlToSign,"SOAP-ENV:Envelope");
    CkXml_AddAttribute(xmlToSign,"xmlns:SOAP-ENV","http://schemas.xmlsoap.org/soap/envelope/");
    CkXml_AddAttribute(xmlToSign,"xmlns:xsd","http://www.w3.org/2001/XMLSchema");
    CkXml_AddAttribute(xmlToSign,"xmlns:xsi","http://www.w3.org/2001/XMLSchema-instance");
    CkXml_UpdateAttrAt(xmlToSign,"SOAP-ENV:Header|wsse:Security",TRUE,"xmlns:wsse","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd");
    CkXml_UpdateAttrAt(xmlToSign,"SOAP-ENV:Header|wsse:Security|wsse:BinarySecurityToken",TRUE,"xmlns:wsu","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd");
    CkXml_UpdateAttrAt(xmlToSign,"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");
    CkXml_UpdateAttrAt(xmlToSign,"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");
    CkXml_UpdateAttrAt(xmlToSign,"SOAP-ENV:Header|wsse:Security|wsse:BinarySecurityToken",TRUE,"wsu:Id","CertId-1673181727");
    CkXml_UpdateChildContent(xmlToSign,"SOAP-ENV:Header|wsse:Security|wsse:BinarySecurityToken",CkStringBuilder_getAsString(sbCert64));
    CkXml_UpdateAttrAt(xmlToSign,"SOAP-ENV:Header|ns1:MeFHeader",TRUE,"xmlns:ns1","http://www.irs.gov/a2a/mef/MeFHeader.xsd");
    CkXml_UpdateAttrAt(xmlToSign,"SOAP-ENV:Header|ns1:MeFHeader",TRUE,"xmlns:wsu","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd");
    CkXml_UpdateAttrAt(xmlToSign,"SOAP-ENV:Header|ns1:MeFHeader",TRUE,"wsu:Id","id-1214941501");
    CkXml_UpdateChildContent(xmlToSign,"SOAP-ENV:Header|ns1:MeFHeader|ns1:MessageID","12345202018200000234");
    CkXml_UpdateChildContent(xmlToSign,"SOAP-ENV:Header|ns1:MeFHeader|ns1:Action","Login");
    CkXml_UpdateChildContent(xmlToSign,"SOAP-ENV:Header|ns1:MeFHeader|ns1:MessageTs","2020-06-30T15:25:42.678Z");
    CkXml_UpdateChildContentInt(xmlToSign,"SOAP-ENV:Header|ns1:MeFHeader|ns1:ETIN",12345);
    CkXml_UpdateChildContent(xmlToSign,"SOAP-ENV:Header|ns1:MeFHeader|ns1:SessionKeyCd","Y");
    CkXml_UpdateChildContent(xmlToSign,"SOAP-ENV:Header|ns1:MeFHeader|ns1:TestCd","P");
    CkXml_UpdateChildContentInt(xmlToSign,"SOAP-ENV:Header|ns1:MeFHeader|ns1:AppSysID",65432190);
    CkXml_UpdateChildContent(xmlToSign,"SOAP-ENV:Header|ns1:MeFHeader|ns1:WSDLVersionNum","10.3");
    CkXml_UpdateChildContent(xmlToSign,"SOAP-ENV:Header|ns1:MeFHeader|ns1:ClientSoftwareTxt","SOATest");
    CkXml_UpdateAttrAt(xmlToSign,"SOAP-ENV:Body",TRUE,"xmlns:wsu","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd");
    CkXml_UpdateAttrAt(xmlToSign,"SOAP-ENV:Body",TRUE,"wsu:Id","id-1871558655");
    CkXml_UpdateAttrAt(xmlToSign,"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 = CkXmlDSigGen_Create();

    CkXmlDSigGen_putSigLocation(gen,"SOAP-ENV:Envelope|SOAP-ENV:Header|wsse:Security");
    CkXmlDSigGen_putSigLocationMod(gen,0);
    CkXmlDSigGen_putSigNamespacePrefix(gen,"ds");
    CkXmlDSigGen_putSigNamespaceUri(gen,"http://www.w3.org/2000/09/xmldsig#");
    CkXmlDSigGen_putSignedInfoCanonAlg(gen,"EXCL_C14N");
    CkXmlDSigGen_putSignedInfoDigestMethod(gen,"sha256");

    // Set the KeyInfoId before adding references..
    CkXmlDSigGen_putKeyInfoId(gen,"KeyId-256137097");

    // -------- Reference 1 --------
    CkXmlDSigGen_AddSameDocRef(gen,"id-1214941501","sha256","EXCL_C14N","","");

    // -------- Reference 2 --------
    CkXmlDSigGen_AddSameDocRef(gen,"id-1871558655","sha256","EXCL_C14N","","");

    // Provide a certificate + private key. (PFX password is test123)
    cert = CkCert_Create();
    success = CkCert_LoadPfxFile(cert,"qa_data/pfx/cert_test123.pfx","test123");
    if (success != TRUE) {
        printf("%s\n",CkCert_lastErrorText(cert));
        CkPfx_Dispose(pfx);
        CkBinData_Dispose(bdCert);
        CkStringBuilder_Dispose(sbCert64);
        CkXml_Dispose(xmlToSign);
        CkXmlDSigGen_Dispose(gen);
        CkCert_Dispose(cert);
        return;
    }

    CkXmlDSigGen_SetX509Cert(gen,cert,TRUE);

    CkXmlDSigGen_putKeyInfoType(gen,"Custom");

    // Create the custom KeyInfo XML..
    xmlCustomKeyInfo = CkXml_Create();
    CkXml_putTag(xmlCustomKeyInfo,"wsse:SecurityTokenReference");
    CkXml_AddAttribute(xmlCustomKeyInfo,"xmlns:wsu","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd");
    CkXml_AddAttribute(xmlCustomKeyInfo,"wsu:Id","STRId-1862925355");
    CkXml_UpdateAttrAt(xmlCustomKeyInfo,"wsse:Reference",TRUE,"URI","#CertId-1673181727");
    CkXml_UpdateAttrAt(xmlCustomKeyInfo,"wsse:Reference",TRUE,"ValueType","http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509v3");

    CkXml_putEmitXmlDecl(xmlCustomKeyInfo,FALSE);
    CkXmlDSigGen_putCustomKeyInfoXml(gen,CkXml_getXml(xmlCustomKeyInfo));

    // -------------------------------------------------------------------------------------------
    // Load XML to be signed...
    sbXml = CkStringBuilder_Create();
    CkXml_GetXmlSb(xmlToSign,sbXml);

    // Update BinarySecurityToken_Base64Binary_Content with the actual X509 of the signing cert.
    nReplaced = CkStringBuilder_Replace(sbXml,"BinarySecurityToken_Base64Binary_Content",CkCert_getEncoded(cert));

    CkXmlDSigGen_putBehaviors(gen,"IndentedSignature");

    // Sign the XML...
    success = CkXmlDSigGen_CreateXmlDSigSb(gen,sbXml);
    if (success != TRUE) {
        printf("%s\n",CkXmlDSigGen_lastErrorText(gen));
        CkPfx_Dispose(pfx);
        CkBinData_Dispose(bdCert);
        CkStringBuilder_Dispose(sbCert64);
        CkXml_Dispose(xmlToSign);
        CkXmlDSigGen_Dispose(gen);
        CkCert_Dispose(cert);
        CkXml_Dispose(xmlCustomKeyInfo);
        CkStringBuilder_Dispose(sbXml);
        return;
    }

    // -----------------------------------------------

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

    printf("%s\n",CkStringBuilder_getAsString(sbXml));


    CkPfx_Dispose(pfx);
    CkBinData_Dispose(bdCert);
    CkStringBuilder_Dispose(sbCert64);
    CkXml_Dispose(xmlToSign);
    CkXmlDSigGen_Dispose(gen);
    CkCert_Dispose(cert);
    CkXml_Dispose(xmlCustomKeyInfo);
    CkStringBuilder_Dispose(sbXml);

    }

 

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