(Unicode C) Italian FatturaPA (e-Invoice) Signed XML (CADES-BES P7M) using USB SmartCard Reader

Demonstrates Italian e-Invoice (FatturaPA) signing by using a private key stored on a USB smartcard reader.

Chilkat C/C++ Library Downloads
MS Visual C/C++ Linux/CentOS C/C++ Alpine Linux C/C++ MAC OS X C/C++	armhf/aarch64 C/C++ C++ Builder iOS C/C++ Android C/C++	Solaris C/C++ MinGW C/C++

#include <C_CkCrypt2W.h>
#include <C_CkCertW.h>
#include <C_CkJsonObjectW.h>

void ChilkatSample(void)
    {
    HCkCrypt2W crypt;
    HCkCertW cert;
    BOOL success;
    HCkJsonObjectW signedAttrs;
    const wchar_t *inputXmlPath;
    const wchar_t *outputP7mPath;

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

    crypt = CkCrypt2W_Create();
    CkCrypt2W_putVerboseLogging(crypt,TRUE);

    cert = CkCertW_Create();
    // Use your smart card user PIN for signing.
    CkCertW_putSmartCardPin(cert,L"0000");

    success = CkCertW_LoadFromSmartcard(cert,L"");
    if (success == FALSE) {
        wprintf(L"%s\n",CkCertW_lastErrorText(cert));
        CkCrypt2W_Dispose(crypt);
        CkCertW_Dispose(cert);
        return;
    }

    success = CkCrypt2W_SetSigningCert(crypt,cert);
    if (success == FALSE) {
        wprintf(L"%s\n",CkCrypt2W_lastErrorText(crypt));
        CkCrypt2W_Dispose(crypt);
        CkCertW_Dispose(cert);
        return;
    }

    // The CadesEnabled property applies to all methods that create PKCS7 signatures. 
    // To create a CAdES-BES signature, set this property equal to true.
    CkCrypt2W_putCadesEnabled(crypt,TRUE);

    CkCrypt2W_putHashAlgorithm(crypt,L"sha256");

    signedAttrs = CkJsonObjectW_Create();
    CkJsonObjectW_UpdateInt(signedAttrs,L"contentType",1);
    CkJsonObjectW_UpdateInt(signedAttrs,L"signingTime",1);
    CkJsonObjectW_UpdateInt(signedAttrs,L"messageDigest",1);
    CkJsonObjectW_UpdateInt(signedAttrs,L"signingCertificateV2",1);
    CkCrypt2W_putSigningAttributes(crypt,CkJsonObjectW_emit(signedAttrs));

    // Load XML such as the following:
    //  <p:FatturaElettronica xmlns:p="http://ivaservizi.agenziaentrate.gov.it/docs/xsd/fatture/v1.2" versione="FPR12">
    //     <FatturaElettronicaHeader>
    //        <DatiTrasmissione>
    // 	...
    //        </DatiTrasmissione>
    //        <CedentePrestatore>
    // 	...
    //        </CedentePrestatore>
    //        <CessionarioCommittente>
    // 	...
    //        </CessionarioCommittente>
    //     </FatturaElettronicaHeader>
    //     <FatturaElettronicaBody>
    //        <DatiGenerali>
    //           <DatiGeneraliDocumento>
    // 		...
    //           </DatiGeneraliDocumento>
    //        </DatiGenerali>
    //        <DatiBeniServizi>
    // 	...
    //        </DatiBeniServizi>
    //     </FatturaElettronicaBody>
    //  </p:FatturaElettronica>

    inputXmlPath = L"c:/someDir/e-Invoice.xml";
    outputP7mPath = L"c:/someDir/signed.p7m";

    // Create the CAdES-BES attached signature, which contains the original data.
    success = CkCrypt2W_CreateP7M(crypt,inputXmlPath,outputP7mPath);
    if (success == FALSE) {
        wprintf(L"%s\n",CkCrypt2W_lastErrorText(crypt));
        CkCrypt2W_Dispose(crypt);
        CkCertW_Dispose(cert);
        CkJsonObjectW_Dispose(signedAttrs);
        return;
    }

    wprintf(L"Success.\n");


    CkCrypt2W_Dispose(crypt);
    CkCertW_Dispose(cert);
    CkJsonObjectW_Dispose(signedAttrs);

    }