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Sign XML for Zakat, Tax and Customs Authority (ZATCA)
See more ZATCA Examples
Demonstrates how to sign XML for Zakat, Tax and Customs Authority (ZATCA).Chilkat Go Downloads
success := false
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
success = true
// Load XML to be signed...
sbXml := chilkat.NewStringBuilder()
success = sbXml.LoadFile("qa_data/xml_dsig_valid_samples/UBL_Saudi_ZATCA_Zakat_Tax_and_Customs_Authority_toBeSigned.xml","utf-8")
if success == false {
fmt.Println("Failed to load XML file to be signed.")
sbXml.DisposeStringBuilder()
return
}
// Loads XML containing the following (with data modified from the original sample).
// <?xml version="1.0" encoding="UTF-8"?>
// <Invoice xmlns="urn:oasis:names:specification:ubl:schema:xsd:Invoice-2" xmlns:cac="urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2" xmlns:cbc="urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2" xmlns:ext="urn:oasis:names:specification:ubl:schema:xsd:CommonExtensionComponents-2"><ext:UBLExtensions>
// <ext:UBLExtension>
// <ext:ExtensionURI>urn:oasis:names:specification:ubl:dsig:enveloped:xades</ext:ExtensionURI>
// <ext:ExtensionContent>
// <sig:UBLDocumentSignatures xmlns:sig="urn:oasis:names:specification:ubl:schema:xsd:CommonSignatureComponents-2" xmlns:sac="urn:oasis:names:specification:ubl:schema:xsd:SignatureAggregateComponents-2" xmlns:sbc="urn:oasis:names:specification:ubl:schema:xsd:SignatureBasicComponents-2">
// <sac:SignatureInformation>
// <cbc:ID>urn:oasis:names:specification:ubl:signature:1</cbc:ID>
// <sbc:ReferencedSignatureID>urn:oasis:names:specification:ubl:signature:Invoice</sbc:ReferencedSignatureID>
//
// </sac:SignatureInformation>
// </sig:UBLDocumentSignatures>
// </ext:ExtensionContent>
// </ext:UBLExtension>
// </ext:UBLExtensions>
//
// <cbc:ProfileID>reporting:1.0</cbc:ProfileID>
// <cbc:ID>100</cbc:ID>
// <cbc:UUID>3cf5ee18-ee25-44ea-a444-2c37ba7f28be</cbc:UUID>
// <cbc:IssueDate>2021-04-25</cbc:IssueDate>
// <cbc:IssueTime>15:30:00</cbc:IssueTime>
// <cbc:InvoiceTypeCode name="0100000">388</cbc:InvoiceTypeCode>
// <cbc:DocumentCurrencyCode>SAR</cbc:DocumentCurrencyCode>
// <cbc:TaxCurrencyCode>SAR</cbc:TaxCurrencyCode>
// <cbc:LineCountNumeric>2</cbc:LineCountNumeric>
// <cac:AdditionalDocumentReference>
// <cbc:ID>ICV</cbc:ID>
// <cbc:UUID>46531</cbc:UUID>
// </cac:AdditionalDocumentReference>
// <cac:AdditionalDocumentReference>
// <cbc:ID>PIH</cbc:ID>
// <cac:Attachment>
// <cbc:EmbeddedDocumentBinaryObject mimeCode="text/plain">NWZl......NTdlOQ==</cbc:EmbeddedDocumentBinaryObject>
// </cac:Attachment>
// </cac:AdditionalDocumentReference>
//
//
// <cac:AdditionalDocumentReference>
// <cbc:ID>QR</cbc:ID>
// <cac:Attachment>
// <cbc:EmbeddedDocumentBinaryObject mimeCode="text/plain">ARlBbC........FAau5g</cbc:EmbeddedDocumentBinaryObject>
// </cac:Attachment>
// </cac:AdditionalDocumentReference><cac:Signature>
// <cbc:ID>urn:oasis:names:specification:ubl:signature:Invoice</cbc:ID>
// <cbc:SignatureMethod>urn:oasis:names:specification:ubl:dsig:enveloped:xades</cbc:SignatureMethod>
// </cac:Signature><cac:AccountingSupplierParty>
// <cac:Party>
// <cac:PartyIdentification>
// <cbc:ID schemeID="MLS">123457890</cbc:ID>
// </cac:PartyIdentification>
// <cac:PostalAddress>
// <cbc:StreetName>King Abdulaziz Road</cbc:StreetName>
// <cbc:BuildingNumber>9999</cbc:BuildingNumber>
// <cbc:PlotIdentification>9999</cbc:PlotIdentification>
// <cbc:CitySubdivisionName>Al Amal</cbc:CitySubdivisionName>
// <cbc:CityName>Riyadh</cbc:CityName>
// <cbc:PostalZone>12643</cbc:PostalZone>
// <cbc:CountrySubentity>Riyadh Region</cbc:CountrySubentity>
// <cac:Country>
// <cbc:IdentificationCode>SA</cbc:IdentificationCode>
// </cac:Country>
// </cac:PostalAddress>
// <cac:PartyTaxScheme>
// <cbc:CompanyID>300099999900003</cbc:CompanyID>
// <cac:TaxScheme>
// <cbc:ID>VAT</cbc:ID>
// </cac:TaxScheme>
// </cac:PartyTaxScheme>
// <cac:PartyLegalEntity>
// <cbc:RegistrationName>Example Co. LTD</cbc:RegistrationName>
// </cac:PartyLegalEntity>
// </cac:Party>
// </cac:AccountingSupplierParty>
// <cac:AccountingCustomerParty>
// <cac:Party>
// <cac:PartyIdentification>
// <cbc:ID schemeID="SAG">123C12345678</cbc:ID>
// </cac:PartyIdentification>
// <cac:PostalAddress>
// <cbc:StreetName>King Abdullah Road</cbc:StreetName>
// <cbc:BuildingNumber>9999</cbc:BuildingNumber>
// <cbc:PlotIdentification>9999</cbc:PlotIdentification>
// <cbc:CitySubdivisionName>Al Mursalat</cbc:CitySubdivisionName>
// <cbc:CityName>Riyadh</cbc:CityName>
// <cbc:PostalZone>11564</cbc:PostalZone>
// <cbc:CountrySubentity>Riyadh Region</cbc:CountrySubentity>
// <cac:Country>
// <cbc:IdentificationCode>SA</cbc:IdentificationCode>
// </cac:Country>
// </cac:PostalAddress>
// <cac:PartyTaxScheme>
// <cac:TaxScheme>
// <cbc:ID>VAT</cbc:ID>
// </cac:TaxScheme>
// </cac:PartyTaxScheme>
// <cac:PartyLegalEntity>
// <cbc:RegistrationName>EXAMPLE MARKETS</cbc:RegistrationName>
// </cac:PartyLegalEntity>
// </cac:Party>
// </cac:AccountingCustomerParty>
// <cac:Delivery>
// <cbc:ActualDeliveryDate>2022-04-25</cbc:ActualDeliveryDate>
// </cac:Delivery>
// <cac:PaymentMeans>
// <cbc:PaymentMeansCode>42</cbc:PaymentMeansCode>
// </cac:PaymentMeans>
// <cac:TaxTotal>
// <cbc:TaxAmount currencyID="SAR">135.00</cbc:TaxAmount>
// <cac:TaxSubtotal>
// <cbc:TaxableAmount currencyID="SAR">900.00</cbc:TaxableAmount>
// <cbc:TaxAmount currencyID="SAR">135.00</cbc:TaxAmount>
// <cac:TaxCategory>
// <cbc:ID>S</cbc:ID>
// <cbc:Percent>15</cbc:Percent>
// <cac:TaxScheme>
// <cbc:ID>VAT</cbc:ID>
// </cac:TaxScheme>
// </cac:TaxCategory>
// </cac:TaxSubtotal>
// </cac:TaxTotal>
// <cac:TaxTotal>
// <cbc:TaxAmount currencyID="SAR">135.00</cbc:TaxAmount>
// </cac:TaxTotal>
// <cac:LegalMonetaryTotal>
// <cbc:LineExtensionAmount currencyID="SAR">900.00</cbc:LineExtensionAmount>
// <cbc:TaxExclusiveAmount currencyID="SAR">900.00</cbc:TaxExclusiveAmount>
// <cbc:TaxInclusiveAmount currencyID="SAR">1035.00</cbc:TaxInclusiveAmount>
// <cbc:AllowanceTotalAmount currencyID="SAR">0.00</cbc:AllowanceTotalAmount>
// <cbc:PayableAmount currencyID="SAR">1035.00</cbc:PayableAmount>
// </cac:LegalMonetaryTotal>
// <cac:InvoiceLine>
// <cbc:ID>1</cbc:ID>
// <cbc:InvoicedQuantity unitCode="PCE">1</cbc:InvoicedQuantity>
// <cbc:LineExtensionAmount currencyID="SAR">200.00</cbc:LineExtensionAmount>
// <cac:TaxTotal>
// <cbc:TaxAmount currencyID="SAR">30.00</cbc:TaxAmount>
// <cbc:RoundingAmount currencyID="SAR">230.00</cbc:RoundingAmount>
// </cac:TaxTotal>
// <cac:Item>
// <cbc:Name>Item A</cbc:Name>
// <cac:ClassifiedTaxCategory>
// <cbc:ID>S</cbc:ID>
// <cbc:Percent>15</cbc:Percent>
// <cac:TaxScheme>
// <cbc:ID>VAT</cbc:ID>
// </cac:TaxScheme>
// </cac:ClassifiedTaxCategory>
// </cac:Item>
// <cac:Price>
// <cbc:PriceAmount currencyID="SAR">200.00</cbc:PriceAmount>
// </cac:Price>
// </cac:InvoiceLine>
// <cac:InvoiceLine>
// <cbc:ID>2</cbc:ID>
// <cbc:InvoicedQuantity unitCode="PCE">2</cbc:InvoicedQuantity>
// <cbc:LineExtensionAmount currencyID="SAR">700.00</cbc:LineExtensionAmount>
// <cac:TaxTotal>
// <cbc:TaxAmount currencyID="SAR">105.00</cbc:TaxAmount>
// <cbc:RoundingAmount currencyID="SAR">805.00</cbc:RoundingAmount>
// </cac:TaxTotal>
// <cac:Item>
// <cbc:Name>Item B</cbc:Name>
// <cac:ClassifiedTaxCategory>
// <cbc:ID>S</cbc:ID>
// <cbc:Percent>15</cbc:Percent>
// <cac:TaxScheme>
// <cbc:ID>VAT</cbc:ID>
// </cac:TaxScheme>
// </cac:ClassifiedTaxCategory>
// </cac:Item>
// <cac:Price>
// <cbc:PriceAmount currencyID="SAR">350.00</cbc:PriceAmount>
// </cac:Price>
// </cac:InvoiceLine>
// </Invoice>
gen := chilkat.NewXmlDSigGen()
gen.SetSigLocation("Invoice|ext:UBLExtensions|ext:UBLExtension|ext:ExtensionContent|sig:UBLDocumentSignatures|sac:SignatureInformation")
gen.SetSigLocationMod(0)
gen.SetSigId("signature")
gen.SetSigNamespacePrefix("ds")
gen.SetSigNamespaceUri("http://www.w3.org/2000/09/xmldsig#")
gen.SetSignedInfoCanonAlg("C14N_11")
gen.SetSignedInfoDigestMethod("sha256")
// Create an Object to be added to the Signature.
object1 := chilkat.NewXml()
object1.SetTag("xades:QualifyingProperties")
object1.AddAttribute("xmlns:xades","http://uri.etsi.org/01903/v1.3.2#")
object1.AddAttribute("Target","signature")
object1.UpdateAttrAt("xades:SignedProperties",true,"Id","xadesSignedProperties")
object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningTime","TO BE GENERATED BY CHILKAT")
object1.UpdateAttrAt("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestMethod",true,"Algorithm","http://www.w3.org/2001/04/xmlenc#sha256")
object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestValue","TO BE GENERATED BY CHILKAT")
object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:IssuerSerial|ds:X509IssuerName","TO BE GENERATED BY CHILKAT")
object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:IssuerSerial|ds:X509SerialNumber","TO BE GENERATED BY CHILKAT")
gen.AddObject("",*object1.GetXml(),"","")
// -------- Reference 1 --------
xml1 := chilkat.NewXml()
xml1.SetTag("ds:Transforms")
xml1.UpdateAttrAt("ds:Transform",true,"Algorithm","http://www.w3.org/TR/1999/REC-xpath-19991116")
xml1.UpdateChildContent("ds:Transform|ds:XPath","not(//ancestor-or-self::ext:UBLExtensions)")
xml1.UpdateAttrAt("ds:Transform[1]",true,"Algorithm","http://www.w3.org/TR/1999/REC-xpath-19991116")
xml1.UpdateChildContent("ds:Transform[1]|ds:XPath","not(//ancestor-or-self::cac:Signature)")
xml1.UpdateAttrAt("ds:Transform[2]",true,"Algorithm","http://www.w3.org/TR/1999/REC-xpath-19991116")
xml1.UpdateChildContent("ds:Transform[2]|ds:XPath","not(//ancestor-or-self::cac:AdditionalDocumentReference[cbc:ID='QR'])")
xml1.UpdateAttrAt("ds:Transform[3]",true,"Algorithm","http://www.w3.org/2006/12/xml-c14n11")
gen.AddSameDocRef2("","sha256",xml1,"")
gen.SetRefIdAttr("","invoiceSignedData")
// -------- Reference 2 --------
gen.AddObjectRef("xadesSignedProperties","sha256","","","http://www.w3.org/2000/09/xmldsig#SignatureProperties")
// Provide a certificate + private key. (PFX password is test123)
certFromPfx := chilkat.NewCert()
success = certFromPfx.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123")
if success != true {
fmt.Println(certFromPfx.LastErrorText())
sbXml.DisposeStringBuilder()
gen.DisposeXmlDSigGen()
object1.DisposeXml()
xml1.DisposeXml()
certFromPfx.DisposeCert()
return
}
// Alternatively, if your certificate and private key are in separate PEM files, do this:
cert := chilkat.NewCert()
success = cert.LoadFromFile("qa_data/zatca/cert.pem")
if success != true {
fmt.Println(cert.LastErrorText())
sbXml.DisposeStringBuilder()
gen.DisposeXmlDSigGen()
object1.DisposeXml()
xml1.DisposeXml()
certFromPfx.DisposeCert()
cert.DisposeCert()
return
}
fmt.Println(cert.SubjectCN())
// Load the private key.
privKey := chilkat.NewPrivateKey()
success = privKey.LoadPemFile("qa_data/zatca/ec-secp256k1-priv-key.pem")
if success != true {
fmt.Println(privKey.LastErrorText())
sbXml.DisposeStringBuilder()
gen.DisposeXmlDSigGen()
object1.DisposeXml()
xml1.DisposeXml()
certFromPfx.DisposeCert()
cert.DisposeCert()
privKey.DisposePrivateKey()
return
}
fmt.Println("Key Type: ", privKey.KeyType())
// Associate the private key with the certificate.
success = cert.SetPrivateKey(privKey)
if success != true {
fmt.Println(cert.LastErrorText())
sbXml.DisposeStringBuilder()
gen.DisposeXmlDSigGen()
object1.DisposeXml()
xml1.DisposeXml()
certFromPfx.DisposeCert()
cert.DisposeCert()
privKey.DisposePrivateKey()
return
}
// The certificate passed to SetX509Cert must have an associated private key.
// If the cert was loaded from a PFX, then it should automatically has an associated private key.
// If the cert was loaded from PEM, then the private key was explicitly associated as shown above.
success = gen.SetX509Cert(cert,true)
if success != true {
fmt.Println(gen.LastErrorText())
sbXml.DisposeStringBuilder()
gen.DisposeXmlDSigGen()
object1.DisposeXml()
xml1.DisposeXml()
certFromPfx.DisposeCert()
cert.DisposeCert()
privKey.DisposePrivateKey()
return
}
gen.SetKeyInfoType("X509Data")
gen.SetX509Type("Certificate")
// ---------------- This is important -----------------------------------------
// Starting in Chilkat v9.5.0.92, add the "ZATCA" behavior to produce the format required by ZATCA.
gen.SetBehaviors("IndentedSignature,TransformSignatureXPath,ZATCA")
// ----------------------------------------------------------------------------
// Sign the XML...
success = gen.CreateXmlDSigSb(sbXml)
if success != true {
fmt.Println(gen.LastErrorText())
sbXml.DisposeStringBuilder()
gen.DisposeXmlDSigGen()
object1.DisposeXml()
xml1.DisposeXml()
certFromPfx.DisposeCert()
cert.DisposeCert()
privKey.DisposePrivateKey()
return
}
// -----------------------------------------------
// Save the signed XML to a file.
success = sbXml.WriteFile("qa_output/signedXml.xml","utf-8",false)
fmt.Println(*sbXml.GetAsString())
// ----------------------------------------
// Verify the signatures we just produced...
verifier := chilkat.NewXmlDSig()
success = verifier.LoadSignatureSb(sbXml)
if success != true {
fmt.Println(verifier.LastErrorText())
sbXml.DisposeStringBuilder()
gen.DisposeXmlDSigGen()
object1.DisposeXml()
xml1.DisposeXml()
certFromPfx.DisposeCert()
cert.DisposeCert()
privKey.DisposePrivateKey()
verifier.DisposeXmlDSig()
return
}
// ---------------- This is important -----------------------------------------
// Starting in Chilkat v9.5.0.92, specify "ZATCA" in uncommon options
// to validate signed XML according to ZATCA needs.
// ----------------------------------------------------------------------------
verifier.SetUncommonOptions("ZATCA")
numSigs := verifier.NumSignatures()
verifyIdx := 0
for verifyIdx < numSigs {
verifier.SetSelector(verifyIdx)
verified := verifier.VerifySignature(true)
if verified != true {
fmt.Println(verifier.LastErrorText())
sbXml.DisposeStringBuilder()
gen.DisposeXmlDSigGen()
object1.DisposeXml()
xml1.DisposeXml()
certFromPfx.DisposeCert()
cert.DisposeCert()
privKey.DisposePrivateKey()
verifier.DisposeXmlDSig()
return
}
verifyIdx = verifyIdx + 1
}
fmt.Println("All signatures were successfully verified.")
sbXml.DisposeStringBuilder()
gen.DisposeXmlDSigGen()
object1.DisposeXml()
xml1.DisposeXml()
certFromPfx.DisposeCert()
cert.DisposeCert()
privKey.DisposePrivateKey()
verifier.DisposeXmlDSig()