(Unicode C++) Create Egypt ITIDA CAdES-BES .p7s Signature (with strings in-memory)

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Demonstrates how to create a .p7s signature that fits Egypt's ITIDA requirements.

Note: This example requires Chilkat v9.5.0.75 or greater.

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#include <CkCrypt2W.h>
#include <CkCertW.h>
#include <CkJsonObjectW.h>

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

    CkCrypt2W crypt;

    CkCertW cert;

    // There are many ways to load the certificate.  
    // This example was created for a customer using an ePass2003 USB token.
    // Assuming the USB token is the only source of a hardware-based private key..
    bool success = cert.LoadFromSmartcard(L"");
    if (success != true) {
        wprintf(L"%s\n",cert.lastErrorText());
        return;
    }

    // Tell the crypt component to use this cert.
    success = crypt.SetSigningCert(cert);
    if (success != true) {
        wprintf(L"%s\n",crypt.lastErrorText());
        return;
    }

    CkJsonObjectW cmsOptions;
    // Setting "DigestData" causes OID 1.2.840.113549.1.7.5 (digestData) to be used.
    cmsOptions.UpdateBool(L"DigestData",true);
    cmsOptions.UpdateBool(L"OmitAlgorithmIdNull",true);
    crypt.put_CmsOptions(cmsOptions.emit());

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

    crypt.put_HashAlgorithm(L"sha256");

    CkJsonObjectW jsonSigningAttrs;
    jsonSigningAttrs.UpdateInt(L"contentType",1);
    jsonSigningAttrs.UpdateInt(L"signingTime",1);
    jsonSigningAttrs.UpdateInt(L"messageDigest",1);
    jsonSigningAttrs.UpdateInt(L"signingCertificateV2",1);
    crypt.put_SigningAttributes(jsonSigningAttrs.emit());

    // By default, all the certs in the chain of authentication are included in the signature.
    // If desired, we can choose to only include the signing certificate:
    crypt.put_IncludeCertChain(false);

    // Make sure we sign the utf-8 byte representation of the JSON string
    crypt.put_Charset(L"utf-8");

    // Create the CAdES-BES signature.
    const wchar_t *textToSign = L"\"issuer\"\"address\"\"branchID\"\"0\"\"country\"\"EG\"\"regionCity...";

    crypt.put_EncodingMode(L"base64");
    const wchar_t *sigBase64 = crypt.signStringENC(textToSign);
    if (crypt.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",crypt.lastErrorText());
        return;
    }

    wprintf(L"Base64 signature:\n");
    wprintf(L"%s\n",sigBase64);
    }