(PowerBuilder) 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 ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Crypt
oleobject loo_Cert
integer li_Success
oleobject loo_CmsOptions
oleobject loo_JsonSigningAttrs
string ls_JsonInvoice
string ls_SigBase64
oleobject loo_Json
oleobject loo_SbToSend
string ls_ClientId
string ls_ClientSecretKey
oleobject loo_Http
oleobject loo_Req
oleobject loo_Resp
oleobject loo_JsonToken
string ls_AccessToken

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

loo_Crypt = create oleobject
// Use "Chilkat_9_5_0.Crypt2" for versions of Chilkat < 10.0.0
li_rc = loo_Crypt.ConnectToNewObject("Chilkat.Crypt2")
if li_rc < 0 then
    destroy loo_Crypt
    MessageBox("Error","Connecting to COM object failed")
    return
end if
loo_Crypt.VerboseLogging = 1

loo_Cert = create oleobject
// Use "Chilkat_9_5_0.Cert" for versions of Chilkat < 10.0.0
li_rc = loo_Cert.ConnectToNewObject("Chilkat.Cert")

loo_Cert.VerboseLogging = 1

// Set the smart card PIN, which will be needed for signing.
loo_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..
li_Success = loo_Cert.LoadFromSmartcard("")
if li_Success <> 1 then
    Write-Debug loo_Cert.LastErrorText
    destroy loo_Crypt
    destroy loo_Cert
    return
end if

// Tell the crypt class to use this cert.
li_Success = loo_Crypt.SetSigningCert(loo_Cert)
if li_Success <> 1 then
    Write-Debug loo_Crypt.LastErrorText
    destroy loo_Crypt
    destroy loo_Cert
    return
end if

loo_CmsOptions = create oleobject
// Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
li_rc = loo_CmsOptions.ConnectToNewObject("Chilkat.JsonObject")

// Setting "DigestData" causes OID 1.2.840.113549.1.7.5 (digestData) to be used.
loo_CmsOptions.UpdateBool("DigestData",1)
loo_CmsOptions.UpdateBool("OmitAlgorithmIdNull",1)

// Indicate that we are passing normal JSON and we want Chilkat do automatically
// do the ITIDA JSON canonicalization:
loo_CmsOptions.UpdateBool("CanonicalizeITIDA",1)

loo_Crypt.CmsOptions = loo_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. 
loo_Crypt.CadesEnabled = 1

loo_Crypt.HashAlgorithm = "sha256"

loo_JsonSigningAttrs = create oleobject
// Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
li_rc = loo_JsonSigningAttrs.ConnectToNewObject("Chilkat.JsonObject")

loo_JsonSigningAttrs.UpdateInt("contentType",1)
loo_JsonSigningAttrs.UpdateInt("signingTime",1)
loo_JsonSigningAttrs.UpdateInt("messageDigest",1)
loo_JsonSigningAttrs.UpdateInt("signingCertificateV2",1)
loo_Crypt.SigningAttributes = loo_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:
loo_Crypt.IncludeCertChain = 0

// 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.
loo_Crypt.EncodingMode = "base64"

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

ls_JsonInvoice = "{ ... }"
ls_SigBase64 = loo_Crypt.SignStringENC(ls_JsonInvoice)
if loo_Crypt.LastMethodSuccess = 0 then
    Write-Debug loo_Crypt.LastErrorText
    destroy loo_Crypt
    destroy loo_Cert
    destroy loo_CmsOptions
    destroy loo_JsonSigningAttrs
    return
end if

Write-Debug "Base64 signature:"
Write-Debug ls_SigBase64

// Insert the base64 signature into the JSON to be sent
loo_Json = create oleobject
// Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
li_rc = loo_Json.ConnectToNewObject("Chilkat.JsonObject")

loo_Json.Load(ls_JsonInvoice)
loo_Json.UpdateString("signatures[0].signatureType","I")
loo_Json.UpdateString("signatures[0].value",ls_SigBase64)
loo_Json.EmitCompact = 1

// Wrap the JSON in  {"documents":[ ... ]}
loo_SbToSend = create oleobject
// Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
li_rc = loo_SbToSend.ConnectToNewObject("Chilkat.StringBuilder")

loo_SbToSend.Append("{~"documents~":[")
loo_SbToSend.Append(loo_Json.Emit())
loo_SbToSend.Append("]}")

// ------------------------------------------------------------------------
// Get an access token using our client ID and client secret key
ls_ClientId = "abc999ff-1234"
ls_ClientSecretKey = "123fff22-1234-abcd"

loo_Http = create oleobject
// Use "Chilkat_9_5_0.Http" for versions of Chilkat < 10.0.0
li_rc = loo_Http.ConnectToNewObject("Chilkat.Http")

// Causes the Authorization: Basic header to be added..
loo_Http.Login = ls_ClientId
loo_Http.Password = ls_ClientSecretKey
loo_Http.BasicAuth = 1

loo_Req = create oleobject
// Use "Chilkat_9_5_0.HttpRequest" for versions of Chilkat < 10.0.0
li_rc = loo_Req.ConnectToNewObject("Chilkat.HttpRequest")

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

loo_Http.Accept = "application/json"

loo_Resp = loo_Http.PostUrlEncoded("https://id.preprod.eta.gov.eg/connect/token",loo_Req)
if loo_Http.LastMethodSuccess = 0 then
    Write-Debug loo_Http.LastErrorText
    destroy loo_Crypt
    destroy loo_Cert
    destroy loo_CmsOptions
    destroy loo_JsonSigningAttrs
    destroy loo_Json
    destroy loo_SbToSend
    destroy loo_Http
    destroy loo_Req
    return
end if

loo_Http.CloseAllConnections()

Write-Debug "Response status code: " + string(loo_Resp.StatusCode)
Write-Debug "Response body:"
Write-Debug loo_Resp.BodyStr

if loo_Resp.StatusCode <> 200 then
    Write-Debug "Failed."
    destroy loo_Resp
    destroy loo_Crypt
    destroy loo_Cert
    destroy loo_CmsOptions
    destroy loo_JsonSigningAttrs
    destroy loo_Json
    destroy loo_SbToSend
    destroy loo_Http
    destroy loo_Req
    return
end if

loo_JsonToken = create oleobject
// Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
li_rc = loo_JsonToken.ConnectToNewObject("Chilkat.JsonObject")

li_Success = loo_JsonToken.Load(loo_Resp.BodyStr)

ls_AccessToken = loo_JsonToken.StringOf("access_token")
Write-Debug "access_token = " + ls_AccessToken

destroy loo_Resp

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

// No longer sending basic authentication...
loo_Http.Login = ""
loo_Http.Password = ""
loo_Http.BasicAuth = 0

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

loo_Resp = loo_Http.PostJson2("https://api.preprod.invoicing.eta.gov.eg/api/v1/documentsubmissions","application/json; charset=utf-8",loo_SbToSend.GetAsString())
if loo_Http.LastMethodSuccess = 0 then
    Write-Debug loo_Http.LastErrorText
    destroy loo_Crypt
    destroy loo_Cert
    destroy loo_CmsOptions
    destroy loo_JsonSigningAttrs
    destroy loo_Json
    destroy loo_SbToSend
    destroy loo_Http
    destroy loo_Req
    destroy loo_JsonToken
    return
end if

Write-Debug "Response status code: " + string(loo_Resp.StatusCode)
Write-Debug "Response body:"
Write-Debug loo_Resp.BodyStr


destroy loo_Crypt
destroy loo_Cert
destroy loo_CmsOptions
destroy loo_JsonSigningAttrs
destroy loo_Json
destroy loo_SbToSend
destroy loo_Http
destroy loo_Req
destroy loo_JsonToken