C++

Create Egypt ITIDA CAdES-BES Signature with Automatic JSON Canonicalization

See more Egypt ITIDA Examples

Demonstrates how to create a .p7s signature that fits Egypt's ITIDA requirements where Chilkat automatically does the ITIDA JSON canonicalization.

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

C++

#include <CkCrypt2.h>
#include <CkCert.h>
#include <CkJsonObject.h>

void ChilkatSample(void)
    {
    bool success = false;

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

    CkCrypt2 crypt;
    crypt.put_VerboseLogging(true);

    CkCert cert;
    cert.put_VerboseLogging(true);

    //  Set the smart card PIN, which will be needed for signing.
    cert.put_SmartCardPin("12345678");

    //  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..
    success = cert.LoadFromSmartcard("");
    if (success != true) {
        std::cout << cert.lastErrorText() << "\r\n";
        return;
    }

    //  Tell the crypt class to use this cert.
    success = crypt.SetSigningCert(cert);
    if (success != true) {
        std::cout << crypt.lastErrorText() << "\r\n";
        return;
    }

    CkJsonObject cmsOptions;
    //  Setting "DigestData" causes OID 1.2.840.113549.1.7.5 (digestData) to be used.
    cmsOptions.UpdateBool("DigestData",true);
    cmsOptions.UpdateBool("OmitAlgorithmIdNull",true);

    //  Indicate that we are passing normal JSON and we want Chilkat do automatically
    //  do the ITIDA JSON canonicalization:
    cmsOptions.UpdateBool("CanonicalizeITIDA",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("sha256");

    CkJsonObject jsonSigningAttrs;
    jsonSigningAttrs.UpdateInt("contentType",1);
    jsonSigningAttrs.UpdateInt("signingTime",1);
    jsonSigningAttrs.UpdateInt("messageDigest",1);
    jsonSigningAttrs.UpdateInt("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);

    //  Pass a JSON document such as the following.  Chilkat will do the ITIDA canonicalization.
    //  (It is the canonicalized JSON that gets signed.)

    //        {
    //           "issuer":{
    //              "address":{
    //                 "branchID":"0",
    //                 "country":"EG",
    //                 "regionCity":"Cairo",
    //                 "postalCode":"",
    //                 "buildingNumber":"0",
    //                 "street":"123rd Street",
    //                 "governate":"GOVERNATE"
    //              },
    //              "type":"B",
    //              "id":"209999899",
    //              "name":"Xyz SAE"
    //           },
    //           "receiver":{
    //              "address":{
    //                 "country":"EG",
    //                 "regionCity":"CAIRO",
    //                 "postalCode":"11435",
    //                 "buildingNumber":"0",
    //                 "street":"Autostrad Road Abc",
    //                 "governate":"GOVERNATE"
    //              },
    //              "type":"B",
    //              "id":"999999999",
    //              "name":"XYZ EGYPT FOR TRADE"
    //           },
    //           "documentType":"I",
    //           "documentTypeVersion":"1.0",
    //           "dateTimeIssued":"2020-11-15T11:04:53Z",
    //           "taxpayerActivityCode":"1073",
    //           "internalID":"ZZZZ999",
    //           "purchaseOrderReference":"2009199918",
    //           "salesOrderReference":"",
    //           "payment":{
    //              "bankName":"",
    //              "bankAddress":"",
    //              "bankAccountNo":"",
    //              "bankAccountIBAN":"",
    //              "swiftCode":"",
    //              "terms":""
    //           },
    //           "delivery":{
    //              "approach":"",
    //              "packaging":"",
    //              "dateValidity":"",
    //              "exportPort":"",
    //              "countryOfOrigin":"EG",
    //              "grossWeight":0,
    //              "netWeight":0,
    //              "terms":""
    //           },
    //           "invoiceLines":[
    //              {
    //                 "description":"CDM Widget 48GX99X12BA",
    //                 "itemType":"GS1",
    //                 "itemCode":"7622213335056",
    //                 "unitType":"CS",
    //                 "quantity":1.00,
    //                 "unitValue":{
    //                    "currencySold":"EGP",
    //                    "amountEGP":588.67,
    //                    "amountSold":0,
    //                    "currencyExchangeRate":0
    //                 },
    //                 "salesTotal":588.67,
    //                 "total":603.97,
    //                 "valueDifference":0,
    //                 "totalTaxableFees":0,
    //                 "netTotal":529.8,
    //                 "itemsDiscount":0,
    //                 "discount":{
    //                    "rate":10.00,
    //                    "amount":58.87
    //                 },
    //                 "taxableItems":[
    //                    {
    //                       "taxType":"T1",
    //                       "amount":74.17,
    //                       "subType":"No sub",
    //                       "rate":14.00
    //                    }
    //                 ],
    //                 "internalCode":"9099994"
    //              }
    //           ],
    //           "totalSales":588.67,
    //           "totalSalesAmount":588.67,
    //           "totalDiscountAmount":58.87,
    //           "netAmount":529.80,
    //           "taxTotals":[
    //              {
    //                 "taxType":"T1",
    //                 "amount":74.17
    //              }
    //           ],
    //           "extraDiscountAmount":0,
    //           "totalItemsDiscountAmount":0,
    //           "totalAmount":603.97,
    //        }
    //  

    CkJsonObject json;
    success = json.LoadFile("qa_data/itida/sdk.invoicing.eta.gov.eg/files/one-doc.json");
    if (success == false) {
        std::cout << json.lastErrorText() << "\r\n";
        return;
    }

    json.put_EmitCompact(false);

    //  Create the CAdES-BES signature.
    crypt.put_EncodingMode("base64");

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

    const char *sigBase64 = crypt.signStringENC(json.emit());
    if (crypt.get_LastMethodSuccess() == false) {
        std::cout << crypt.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "Base64 signature:" << "\r\n";
    std::cout << sigBase64 << "\r\n";

    //  Add the signature to the JSON.
    json.UpdateString("signatures[0].signatureType","I");
    json.UpdateString("signatures[0].value",sigBase64);

    std::cout << "JSON with signature added:" << "\r\n";
    std::cout << json.emit() << "\r\n";
    }