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(.NET Core C#) Create ITIDA Signed JSON and Send to ETA (Egypt Tax Authority) Portal

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. Also shows the code to send to the ETA Portal.

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

Chilkat.Crypt2 crypt = new Chilkat.Crypt2();
crypt.VerboseLogging = true;

Chilkat.Cert cert = new Chilkat.Cert();
cert.VerboseLogging = true;

// Set the smart card PIN, which will be needed for signing.
cert.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..
bool success = cert.LoadFromSmartcard("");
if (success != true) {
    Debug.WriteLine(cert.LastErrorText);
    return;
}

// Tell the crypt class to use this cert.
success = crypt.SetSigningCert(cert);
if (success != true) {
    Debug.WriteLine(crypt.LastErrorText);
    return;
}

Chilkat.JsonObject cmsOptions = new Chilkat.JsonObject();
// 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.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.CadesEnabled = true;

crypt.HashAlgorithm = "sha256";

Chilkat.JsonObject jsonSigningAttrs = new Chilkat.JsonObject();
jsonSigningAttrs.UpdateInt("contentType",1);
jsonSigningAttrs.UpdateInt("signingTime",1);
jsonSigningAttrs.UpdateInt("messageDigest",1);
jsonSigningAttrs.UpdateInt("signingCertificateV2",1);
crypt.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.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,
//       }

// Build the above JSON..

// Use this online tool to generate code from sample JSON: 
// Generate Code to Create JSON

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

json.EmitCompact = true;
string jsonToSign = json.Emit();

// Create the CAdES-BES signature.
crypt.EncodingMode = "base64";

// Make sure we sign the utf-8 byte representation of the JSON string
crypt.Charset = "utf-8";

string sigBase64 = crypt.SignStringENC(jsonToSign);
if (crypt.LastMethodSuccess == false) {
    Debug.WriteLine(crypt.LastErrorText);
    return;
}

Debug.WriteLine("Base64 signature:");
Debug.WriteLine(sigBase64);

// Insert the base64 signature into the JSON to be sent
json.UpdateString("signatures[0].signatureType","I");
json.UpdateString("signatures[0].value",sigBase64);

// ------------------------------------------------------------------------
// Get an access token using our client ID and client secret key
string clientId = "abc999ff-1234";
string clientSecretKey = "123fff22-1234-abcd";

Chilkat.Http http = new Chilkat.Http();

// Causes the Authorization: Basic header to be added..
http.Login = clientId;
http.Password = clientSecretKey;
http.BasicAuth = true;

Chilkat.HttpRequest req = new Chilkat.HttpRequest();
req.HttpVerb = "POST";
req.Path = "/connect/token";
req.ContentType = "application/x-www-form-urlencoded";
req.AddParam("grant_type","client_credentials");
req.AddHeader("Connection","close");

http.Accept = "application/json";

Chilkat.HttpResponse resp = http.PostUrlEncoded("https://id.preprod.eta.gov.eg/connect/token",req);
if (http.LastMethodSuccess == false) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

http.CloseAllConnections();

Debug.WriteLine("Response status code: " + Convert.ToString(resp.StatusCode));
Debug.WriteLine("Response body:");
Debug.WriteLine(resp.BodyStr);

if (resp.StatusCode != 200) {
    Debug.WriteLine("Failed.");

    return;
}

Chilkat.JsonObject jsonToken = new Chilkat.JsonObject();
success = jsonToken.Load(resp.BodyStr);

string accessToken = jsonToken.StringOf("access_token");
Debug.WriteLine("access_token = " + accessToken);

// ------------------------------------------------------------------------
// Submit the signed JSON to the ETA (Egypt Tax Authority) Portal

// No longer sending basic authentication...
http.Login = "";
http.Password = "";
http.BasicAuth = false;

// Setting the AuthToken property causes the "Authorization: Bearer <token>" header to be added to each request.
http.AuthToken = accessToken;

resp = http.PostJson3("https://api.preprod.invoicing.eta.gov.eg/api/v1/documentsubmissions","application/json; charset=utf-8",json);
if (http.LastMethodSuccess == false) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

Debug.WriteLine("Response status code: " + Convert.ToString(resp.StatusCode));
Debug.WriteLine("Response body:");
Debug.WriteLine(resp.BodyStr);

 

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