Pascal (Lazarus/Delphi)
Pascal (Lazarus/Delphi)
Sign ITIDA JSON and Send to ETA (Egypt Tax Authority) Portal
See more Egypt ITIDA Examples
Demonstrates how to ITIDA canonicalize JSON, create signature, and send to the ETA Portal.Chilkat Pascal (Lazarus/Delphi) Downloads
program ChilkatDemo;
// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.
{$IFDEF FPC}
{$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}
uses
{$IFDEF UNIX}
cthreads,
{$ENDIF}
SysUtils,
CkDllLoader,
Chilkat.Http,
Chilkat.HttpRequest,
Chilkat.HttpResponse,
Chilkat.StringBuilder,
Chilkat.JsonObject,
Chilkat.Cert,
Chilkat.Crypt2;
// ---------------------------------------------------------------------------
procedure RunDemo;
var
success: Boolean;
crypt: TCrypt2;
cert: TCert;
cmsOptions: TJsonObject;
jsonSigningAttrs: TJsonObject;
jsonInvoice: string;
sigBase64: string;
json: TJsonObject;
sbToSend: TStringBuilder;
clientId: string;
clientSecretKey: string;
http: THttp;
req: THttpRequest;
resp: THttpResponse;
jsonToken: TJsonObject;
accessToken: string;
url: string;
jsonStr: string;
begin
success := False;
// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
crypt := TCrypt2.Create;
crypt.VerboseLogging := True;
cert := TCert.Create;
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..
success := cert.LoadFromSmartcard('');
if (success = False) then
begin
WriteLn(cert.LastErrorText);
Exit;
end;
// Tell the crypt class to use this cert.
success := crypt.SetSigningCert(cert);
if (success = False) then
begin
WriteLn(crypt.LastErrorText);
Exit;
end;
cmsOptions := TJsonObject.Create;
// 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';
jsonSigningAttrs := TJsonObject.Create;
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.)
// Note: The JSON should NOT begin with "{ "documents" : [ ..."
// {
// "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,
// }
// 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';
jsonInvoice := '{ ... }';
sigBase64 := crypt.SignStringENC(jsonInvoice);
if (crypt.LastMethodSuccess = False) then
begin
WriteLn(crypt.LastErrorText);
Exit;
end;
WriteLn('Base64 signature:');
WriteLn(sigBase64);
// Insert the base64 signature into the JSON to be sent
json := TJsonObject.Create;
json.Load(jsonInvoice);
json.UpdateString('signatures[0].signatureType','I');
json.UpdateString('signatures[0].value',sigBase64);
json.EmitCompact := True;
// Wrap the JSON in {"documents":[ ... ]}
sbToSend := TStringBuilder.Create;
sbToSend.Append('{"documents":[');
sbToSend.Append(json.Emit());
sbToSend.Append(']}');
// ------------------------------------------------------------------------
// Get an access token using our client ID and client secret key
clientId := 'abc999ff-1234';
clientSecretKey := '123fff22-1234-abcd';
http := THttp.Create;
// Causes the Authorization: Basic header to be added..
http.Login := clientId;
http.Password := clientSecretKey;
http.BasicAuth := True;
req := THttpRequest.Create;
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';
resp := THttpResponse.Create;
success := http.HttpReq('https://id.preprod.eta.gov.eg/connect/token',req,resp);
if (success = False) then
begin
WriteLn(http.LastErrorText);
Exit;
end;
http.CloseAllConnections();
WriteLn('Response status code: ' + resp.StatusCode);
WriteLn('Response body:');
WriteLn(resp.BodyStr);
if (resp.StatusCode <> 200) then
begin
WriteLn('Failed.');
Exit;
end;
jsonToken := TJsonObject.Create;
success := jsonToken.Load(resp.BodyStr);
accessToken := jsonToken.StringOf('access_token');
WriteLn('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;
url := 'https://api.preprod.invoicing.eta.gov.eg/api/v1/documentsubmissions';
jsonStr := sbToSend.GetAsString();
success := http.HttpStr('POST',url,jsonStr,'utf-8','application/json; charset=utf-8',resp);
if (success = False) then
begin
WriteLn(http.LastErrorText);
Exit;
end;
WriteLn('Response status code: ' + resp.StatusCode);
WriteLn('Response body:');
WriteLn(resp.BodyStr);
crypt.Free;
cert.Free;
cmsOptions.Free;
jsonSigningAttrs.Free;
json.Free;
sbToSend.Free;
http.Free;
req.Free;
resp.Free;
jsonToken.Free;
end;
// ---------------------------------------------------------------------------
begin
try
RunDemo;
except
on E: Exception do
WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
end;
WriteLn;
{$IFDEF MSWINDOWS}
WriteLn('Press Enter to exit...');
ReadLn;
{$ENDIF}
end.