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PowerBuilder

CADES-BES Signature using ePass2003 Token

See more Egypt ITIDA Examples

Demonstrates using a certificate and private key located on an ePass2003 USB token to create a CADES-BES signature.

(Demonstrates how to create a .p7s signature that fits Egypt's ITIDA requirements where Chilkat automatically does the ITIDA JSON canonicalization.)

Chilkat PowerBuilder Downloads

PowerBuilder
integer li_rc
long li_Success
oleobject loo_Scmd
string ls_ReaderName
long li_Retval
string ls_CertPart
string ls_PartValue
oleobject loo_Cert
oleobject loo_Crypt
oleobject loo_CmsOptions
oleobject loo_JsonSigningAttrs
oleobject loo_Json
string ls_SigBase64

li_Success = 0

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

loo_Scmd = create oleobject
li_rc = loo_Scmd.ConnectToNewObject("Chilkat.ScMinidriver")
if li_rc < 0 then
    destroy loo_Scmd
    MessageBox("Error","Connecting to COM object failed")
    return
end if

//  Reader names (smart card readers or USB tokens) can be discovered
//  via List Readers or Find Smart Cards
ls_ReaderName = "FS USB Token 0"
li_Success = loo_Scmd.AcquireContext(ls_ReaderName)
if li_Success = 0 then
    Write-Debug loo_Scmd.LastErrorText
    destroy loo_Scmd
    return
end if

//  If successful, the name of the currently inserted smart card is available:
Write-Debug "Card name: " + loo_Scmd.CardName

//  If desired, perform regular PIN authentication with the smartcard.
//  For more details about smart card PIN authentication, see the Smart Card PIN Authentication Example
li_Retval = loo_Scmd.PinAuthenticate("user","12345678")
if li_Retval <> 0 then
    Write-Debug "PIN Authentication failed."
end if

//  You can find a cerficate using any of the following certificate parts:
//  "subjectDN" -- The full distinguished name of the cert.
//  "subjectDN_withTags" -- Same as above, but in a format that includes the subject part tags, such as the "CN=" in "CN=something"
//  "subjectCN" -- The common name part (CN) of the certificate's subject.
//  "serial" -- The certificate serial number.
//  "serial:issuerCN" -- The certificate serial number + the issuer's common name, delimited with a colon char.
//  These are the same certificate parts that can be retrieved by listing certificates on the smart card (or USB token).
//  See List Certificates on Smart Card Example
ls_CertPart = "subjectCN"
ls_PartValue = "Matt"

//  If the certificate is found, it is loaded into the cert object.
//  Note: We imported this certificate from a .p12/.pfx using code such as this Example to Import a .pfx/.p12 onto a Smart Card
loo_Cert = create oleobject
li_rc = loo_Cert.ConnectToNewObject("Chilkat.Cert")

li_Success = loo_Scmd.FindCert(ls_CertPart,ls_PartValue,loo_Cert)
if li_Success = 0 then
    Write-Debug "Failed to find the certificate."
    loo_Scmd.DeleteContext()
    destroy loo_Scmd
    destroy loo_Cert
    return
end if

Write-Debug "Successfully loaded the cert object from the smart card / USB token."

//  Note: When successful, the cert object is internally linked to the ScMinidriver object's authenticated session.
//  The cert object can now be used to sign or do other cryptographic operations that occur on the smart card / USB token.
//  If your application calls PinDeauthenticate or DeleteContext, the cert will no longer be able to sign on the smart card
//  because the smart card ScMinidriver session will no longer be authenticated or deleted.

//  ------------------------------------------------------------------------------------------------------------

//  Here we have to code to create the CADES-BES signature using Chilkat Crypt2..
loo_Crypt = create oleobject
li_rc = loo_Crypt.ConnectToNewObject("Chilkat.Crypt2")

//  Tell the crypt class to use the cert on the ePass2003 token.
li_Success = loo_Crypt.SetSigningCert(loo_Cert)
if li_Success <> 1 then
    Write-Debug loo_Crypt.LastErrorText
    destroy loo_Scmd
    destroy loo_Cert
    destroy loo_Crypt
    return
end if

loo_CmsOptions = create oleobject
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
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.)

//        {
//           "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.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_Scmd
    destroy loo_Cert
    destroy loo_Crypt
    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_Scmd
    destroy loo_Cert
    destroy loo_Crypt
    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()

//  ------------------------------------------------------------------------------------------------------------
//  Cleanup our ScMinidriver session...

//  When finished with operations that required authentication, you may if you wish, deauthenticate the session.
li_Success = loo_Scmd.PinDeauthenticate("user")
if li_Success = 0 then
    Write-Debug loo_Scmd.LastErrorText
end if

//  Delete the context when finished with the card.
li_Success = loo_Scmd.DeleteContext()
if li_Success = 0 then
    Write-Debug loo_Scmd.LastErrorText
end if



destroy loo_Scmd
destroy loo_Cert
destroy loo_Crypt
destroy loo_CmsOptions
destroy loo_JsonSigningAttrs
destroy loo_Json