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(PowerBuilder) 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.

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
oleobject loo_Json
string ls_SigBase64

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

loo_Crypt = create oleobject
li_rc = loo_Crypt.ConnectToNewObject("Chilkat_9_5_0.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
li_rc = loo_Cert.ConnectToNewObject("Chilkat_9_5_0.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
li_rc = loo_CmsOptions.ConnectToNewObject("Chilkat_9_5_0.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
li_rc = loo_JsonSigningAttrs.ConnectToNewObject("Chilkat_9_5_0.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.)

//       {
//          "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,
//       }
// 

loo_Json = create oleobject
li_rc = loo_Json.ConnectToNewObject("Chilkat_9_5_0.JsonObject")

li_Success = loo_Json.LoadFile("qa_data/itida/sdk.invoicing.eta.gov.eg/files/one-doc.json")
if li_Success = 0 then
    Write-Debug loo_Json.LastErrorText
    destroy loo_Crypt
    destroy loo_Cert
    destroy loo_CmsOptions
    destroy loo_JsonSigningAttrs
    destroy loo_Json
    return
end if

loo_Json.EmitCompact = 0

// 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_SigBase64 = loo_Crypt.SignStringENC(loo_Json.Emit())
if loo_Crypt.LastMethodSuccess = 0 then
    Write-Debug loo_Crypt.LastErrorText
    destroy loo_Crypt
    destroy loo_Cert
    destroy loo_CmsOptions
    destroy loo_JsonSigningAttrs
    destroy loo_Json
    return
end if

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

// Add the signature to the JSON.
loo_Json.UpdateString("signatures[0].signatureType","I")
loo_Json.UpdateString("signatures[0].value",ls_SigBase64)

Write-Debug "JSON with signature added:"
Write-Debug loo_Json.Emit()


destroy loo_Crypt
destroy loo_Cert
destroy loo_CmsOptions
destroy loo_JsonSigningAttrs
destroy loo_Json

 

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