Go
Go
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.
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success := false
// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
crypt := chilkat.NewCrypt2()
crypt.SetVerboseLogging(true)
cert := chilkat.NewCert()
cert.SetVerboseLogging(true)
// Set the smart card PIN, which will be needed for signing.
cert.SetSmartCardPin("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..
success = cert.LoadFromSmartcard("")
if success != true {
fmt.Println(cert.LastErrorText())
crypt.DisposeCrypt2()
cert.DisposeCert()
return
}
// Tell the crypt class to use this cert.
success = crypt.SetSigningCert(cert)
if success != true {
fmt.Println(crypt.LastErrorText())
crypt.DisposeCrypt2()
cert.DisposeCert()
return
}
cmsOptions := chilkat.NewJsonObject()
// Setting "DigestData" causes OID 1.2.840.113549.1.7.5 (digestData) to be used.
cmsOptions.UpdateBool("DigestData",true)
cmsOptions.UpdateBool("OmitAlgorithmIdNull",true)
// Indicate that we are passing normal JSON and we want Chilkat do automatically
// do the ITIDA JSON canonicalization:
cmsOptions.UpdateBool("CanonicalizeITIDA",true)
crypt.SetCmsOptions(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.SetCadesEnabled(true)
crypt.SetHashAlgorithm("sha256")
jsonSigningAttrs := chilkat.NewJsonObject()
jsonSigningAttrs.UpdateInt("contentType",1)
jsonSigningAttrs.UpdateInt("signingTime",1)
jsonSigningAttrs.UpdateInt("messageDigest",1)
jsonSigningAttrs.UpdateInt("signingCertificateV2",1)
crypt.SetSigningAttributes(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.SetIncludeCertChain(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,
// }
//
json := chilkat.NewJsonObject()
success = json.LoadFile("qa_data/itida/sdk.invoicing.eta.gov.eg/files/one-doc.json")
if success == false {
fmt.Println(json.LastErrorText())
crypt.DisposeCrypt2()
cert.DisposeCert()
cmsOptions.DisposeJsonObject()
jsonSigningAttrs.DisposeJsonObject()
json.DisposeJsonObject()
return
}
json.SetEmitCompact(false)
// Create the CAdES-BES signature.
crypt.SetEncodingMode("base64")
// Make sure we sign the utf-8 byte representation of the JSON string
crypt.SetCharset("utf-8")
sigBase64 := crypt.SignStringENC(*json.Emit())
if crypt.LastMethodSuccess() == false {
fmt.Println(crypt.LastErrorText())
crypt.DisposeCrypt2()
cert.DisposeCert()
cmsOptions.DisposeJsonObject()
jsonSigningAttrs.DisposeJsonObject()
json.DisposeJsonObject()
return
}
fmt.Println("Base64 signature:")
fmt.Println(*sigBase64)
// Add the signature to the JSON.
json.UpdateString("signatures[0].signatureType","I")
json.UpdateString("signatures[0].value",*sigBase64)
fmt.Println("JSON with signature added:")
fmt.Println(*json.Emit())
crypt.DisposeCrypt2()
cert.DisposeCert()
cmsOptions.DisposeJsonObject()
jsonSigningAttrs.DisposeJsonObject()
json.DisposeJsonObject()