(Swift 2) 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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func chilkatTest() {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // Indicate that utf-8 is desired for strings passed in and out of Chilkat.
    let glob = CkoGlobal()
    glob.DefaultUtf8 = true

    let crypt = CkoCrypt2()
    crypt.VerboseLogging = true

    let cert = CkoCert()
    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..
    var success: Bool = cert.LoadFromSmartcard("")
    if success != true {
        print("\(cert.LastErrorText)")
        return
    }

    // Tell the crypt class to use this cert.
    success = crypt.SetSigningCert(cert)
    if success != true {
        print("\(crypt.LastErrorText)")
        return
    }

    let cmsOptions = CkoJsonObject()
    // Setting "DigestData" causes OID 1.2.840.113549.1.7.5 (digestData) to be used.
    cmsOptions.UpdateBool("DigestData", value: true)
    cmsOptions.UpdateBool("OmitAlgorithmIdNull", value: true)

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

    let jsonSigningAttrs = CkoJsonObject()
    jsonSigningAttrs.UpdateInt("contentType", value: 1)
    jsonSigningAttrs.UpdateInt("signingTime", value: 1)
    jsonSigningAttrs.UpdateInt("messageDigest", value: 1)
    jsonSigningAttrs.UpdateInt("signingCertificateV2", value: 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

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

    json.EmitCompact = true
    var jsonToSign: String? = 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"

    var sigBase64: String? = crypt.SignStringENC(jsonToSign)
    if crypt.LastMethodSuccess == false {
        print("\(crypt.LastErrorText)")
        return
    }

    print("Base64 signature:")
    print("\(sigBase64!)")

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

    // Wrap the JSON in  {"documents":[ ... ]}
    let sbToSend = CkoStringBuilder()
    sbToSend.Append("{\"documents\":[")
    sbToSend.Append(json.Emit())
    sbToSend.Append("]}")

    // ------------------------------------------------------------------------
    // Get an access token using our client ID and client secret key
    var clientId: String? = "abc999ff-1234"
    var clientSecretKey: String? = "123fff22-1234-abcd"

    let http = CkoHttp()

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

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

    http.Accept = "application/json"

    var resp: CkoHttpResponse? = http.PostUrlEncoded("https://id.preprod.eta.gov.eg/connect/token", req: req)
    if http.LastMethodSuccess == false {
        print("\(http.LastErrorText)")
        return
    }

    http.CloseAllConnections()

    print("Response status code: \(resp!.StatusCode.intValue)")
    print("Response body:")
    print("\(resp!.BodyStr)")

    if resp!.StatusCode.intValue != 200 {
        print("Failed.")
        resp = nil
        return
    }

    let jsonToken = CkoJsonObject()
    success = jsonToken.Load(resp!.BodyStr)

    var accessToken: String? = jsonToken.StringOf("access_token")
    print("access_token = \(accessToken!)")

    resp = nil

    // ------------------------------------------------------------------------
    // 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.PostJson2("https://api.preprod.invoicing.eta.gov.eg/api/v1/documentsubmissions", contentType: "application/json; charset=utf-8", jsonText: sbToSend.GetAsString())
    if http.LastMethodSuccess == false {
        print("\(http.LastErrorText)")
        return
    }

    print("Response status code: \(resp!.StatusCode.intValue)")
    print("Response body:")
    print("\(resp!.BodyStr)")

}