(AutoIt) 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

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

$oCrypt = ObjCreate("Chilkat.Crypt2")
$oCrypt.VerboseLogging = True

$oCert = ObjCreate("Chilkat.Cert")
$oCert.VerboseLogging = True

; Set the smart card PIN, which will be needed for signing.
$oCert.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..
Local $bSuccess = $oCert.LoadFromSmartcard("")
If ($bSuccess <> True) Then
    ConsoleWrite($oCert.LastErrorText & @CRLF)
    Exit
EndIf

; Tell the crypt class to use this cert.
$bSuccess = $oCrypt.SetSigningCert($oCert)
If ($bSuccess <> True) Then
    ConsoleWrite($oCrypt.LastErrorText & @CRLF)
    Exit
EndIf

$oCmsOptions = ObjCreate("Chilkat.JsonObject")
; Setting "DigestData" causes OID 1.2.840.113549.1.7.5 (digestData) to be used.
$oCmsOptions.UpdateBool("DigestData",True)
$oCmsOptions.UpdateBool("OmitAlgorithmIdNull",True)

; Indicate that we are passing normal JSON and we want Chilkat do automatically
; do the ITIDA JSON canonicalization:
$oCmsOptions.UpdateBool("CanonicalizeITIDA",True)

$oCrypt.CmsOptions = $oCmsOptions.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. 
$oCrypt.CadesEnabled = True

$oCrypt.HashAlgorithm = "sha256"

$oJsonSigningAttrs = ObjCreate("Chilkat.JsonObject")
$oJsonSigningAttrs.UpdateInt("contentType",1)
$oJsonSigningAttrs.UpdateInt("signingTime",1)
$oJsonSigningAttrs.UpdateInt("messageDigest",1)
$oJsonSigningAttrs.UpdateInt("signingCertificateV2",1)
$oCrypt.SigningAttributes = $oJsonSigningAttrs.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:
$oCrypt.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,
;       }
; 

$oJson = ObjCreate("Chilkat.JsonObject")
$bSuccess = $oJson.LoadFile("qa_data/itida/sdk.invoicing.eta.gov.eg/files/one-doc.json")
If ($bSuccess = False) Then
    ConsoleWrite($oJson.LastErrorText & @CRLF)
    Exit
EndIf

$oJson.EmitCompact = False

; Create the CAdES-BES signature.
$oCrypt.EncodingMode = "base64"

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

Local $sigBase64 = $oCrypt.SignStringENC($oJson.Emit())
If ($oCrypt.LastMethodSuccess = False) Then
    ConsoleWrite($oCrypt.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("Base64 signature:" & @CRLF)
ConsoleWrite($sigBase64 & @CRLF)

; Add the signature to the JSON.
$oJson.UpdateString("signatures[0].signatureType","I")
$oJson.UpdateString("signatures[0].value",$sigBase64)

ConsoleWrite("JSON with signature added:" & @CRLF)
ConsoleWrite($oJson.Emit() & @CRLF)