(Chilkat2-Python) UBL XAdES Enveloped Signature

Demonstrates how to create a UBL XAdES enveloped signature.

Chilkat2 Python Downloads install with pip pip3 install chilkat2 or download... Python Module for Windows, Linux, Alpine Linux, MacOS, Solaris

import sys
import chilkat2

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

success = True

# 
# The following code creates the XML document to be signed.
# (It is also possible to simply load the XML into the Chilkat XML object by calling the LoadXml method.)

# A sample (already signed) of this XML is available here:  External link: credit-note-en16931-xades-signed.xml

# Also, you may use this online tool to generate code from sample XML: 
# Generate Code to Create XML

xmlToSign = chilkat2.Xml()
xmlToSign.Tag = "CreditNote"
xmlToSign.AddAttribute("xmlns","urn:oasis:names:specification:ubl:schema:xsd:CreditNote-2")
xmlToSign.AddAttribute("xmlns:cac","urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2")
xmlToSign.AddAttribute("xmlns:cbc","urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2")
xmlToSign.AddAttribute("xmlns:ext","urn:oasis:names:specification:ubl:schema:xsd:CommonExtensionComponents-2")
xmlToSign.UpdateAttrAt("ext:UBLExtensions|ext:UBLExtension",True,"xmlns:sac","urn:oasis:names:specification:ubl:schema:xsd:SignatureAggregateComponents-2")
xmlToSign.UpdateAttrAt("ext:UBLExtensions|ext:UBLExtension",True,"xmlns:sig","urn:oasis:names:specification:ubl:schema:xsd:CommonSignatureComponents-2")
xmlToSign.UpdateChildContent("ext:UBLExtensions|ext:UBLExtension|ext:ExtensionContent|sig:UBLDocumentSignatures|sac:SignatureInformation","")
xmlToSign.UpdateChildContent("cbc:CustomizationID","urn:cen.eu:en16931:2017")
xmlToSign.UpdateChildContent("cbc:ProfileID","P1")
xmlToSign.UpdateChildContent("cbc:ID","c2ad1540-cf12-4e83-b47c-906aac70242e")
xmlToSign.UpdateChildContent("cbc:IssueDate","2009-12-15")
xmlToSign.UpdateAttrAt("cbc:Note",True,"languageID","en")
xmlToSign.UpdateChildContent("cbc:Note","Ordered in our booth at the convention.")
xmlToSign.UpdateAttrAt("cbc:DocumentCurrencyCode",True,"listAgencyID","6")
xmlToSign.UpdateAttrAt("cbc:DocumentCurrencyCode",True,"listID","ISO 4217 Alpha")
xmlToSign.UpdateChildContent("cbc:DocumentCurrencyCode","HRK")
xmlToSign.UpdateChildContent("cbc:AccountingCost","Project cost code 123")
xmlToSign.UpdateChildContent("cac:InvoicePeriod|cbc:StartDate","2009-11-01")
xmlToSign.UpdateChildContent("cac:InvoicePeriod|cbc:EndDate","2009-11-30")
xmlToSign.UpdateChildContent("cac:OrderReference|cbc:ID","123")
xmlToSign.UpdateChildContent("cac:ContractDocumentReference|cbc:ID","Contract321")
xmlToSign.UpdateChildContent("cac:ContractDocumentReference|cbc:DocumentType","Framework agreement")
xmlToSign.UpdateChildContent("cac:AdditionalDocumentReference|cbc:ID","Doc1")
xmlToSign.UpdateChildContent("cac:AdditionalDocumentReference|cbc:DocumentType","Timesheet")
xmlToSign.UpdateChildContent("cac:AdditionalDocumentReference|cac:Attachment|cac:ExternalReference|cbc:URI","http://www.suppliersite.eu/sheet001.html")
xmlToSign.UpdateChildContent("cac:AdditionalDocumentReference[1]|cbc:ID","Doc2")
xmlToSign.UpdateChildContent("cac:AdditionalDocumentReference[1]|cbc:DocumentType","Drawing")
xmlToSign.UpdateAttrAt("cac:AdditionalDocumentReference[1]|cac:Attachment|cbc:EmbeddedDocumentBinaryObject",True,"mimeCode","application/pdf")
xmlToSign.UpdateChildContent("cac:AdditionalDocumentReference[1]|cac:Attachment|cbc:EmbeddedDocumentBinaryObject","UjBsR09EbGhjZ0dTQUxNQUFBUUNBRU1tQ1p0dU1GUXhEUzhi")
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:PartyIdentification|cbc:ID","9934:18683136487::HR99:276")
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:PostalAddress|cbc:StreetName","KATANCICEVA")
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:PostalAddress|cbc:CityName","ZAGREB")
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:PostalAddress|cbc:PostalZone","10000")
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:PostalAddress|cac:Country|cbc:IdentificationCode","HR")
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:PartyTaxScheme|cbc:CompanyID","HR18683136487")
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:PartyTaxScheme|cac:TaxScheme|cbc:ID","FRE")
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:PartyLegalEntity|cbc:RegistrationName","MINISTARSTVO FINANCIJA")
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:Contact|cbc:Name","JURAJ MARKOVIC")
xmlToSign.UpdateChildContent("cac:AccountingSupplierParty|cac:Party|cac:Contact|cbc:ElectronicMail","juraj.markovic@fina.hr")
xmlToSign.UpdateChildContent("cac:AccountingCustomerParty|cac:Party|cac:PartyIdentification|cbc:ID","9934:49811265576::HR99:NOVO1")
xmlToSign.UpdateChildContent("cac:AccountingCustomerParty|cac:Party|cac:PostalAddress|cbc:StreetName","GETALDICEVA 4")
xmlToSign.UpdateChildContent("cac:AccountingCustomerParty|cac:Party|cac:PostalAddress|cbc:CityName","ZAGREB")
xmlToSign.UpdateChildContent("cac:AccountingCustomerParty|cac:Party|cac:PostalAddress|cbc:PostalZone","10000")
xmlToSign.UpdateChildContent("cac:AccountingCustomerParty|cac:Party|cac:PostalAddress|cac:Country|cbc:IdentificationCode","HR")
xmlToSign.UpdateChildContent("cac:AccountingCustomerParty|cac:Party|cac:PartyTaxScheme|cbc:CompanyID","HR49811265576")
xmlToSign.UpdateChildContent("cac:AccountingCustomerParty|cac:Party|cac:PartyTaxScheme|cac:TaxScheme|cbc:ID","VAT")
xmlToSign.UpdateChildContent("cac:AccountingCustomerParty|cac:Party|cac:PartyLegalEntity|cbc:RegistrationName","NOVO1")
xmlToSign.UpdateChildContent("cac:Delivery|cac:DeliveryLocation|cac:Address|cac:Country|cbc:IdentificationCode","HR")
xmlToSign.UpdateChildContent("cac:PaymentMeans|cbc:PaymentMeansCode","30")
xmlToSign.UpdateChildContent("cac:PaymentMeans|cbc:InstructionNote","Neki opis placanja")
xmlToSign.UpdateChildContent("cac:PaymentMeans|cbc:PaymentID","HR00 12456")
xmlToSign.UpdateChildContent("cac:PaymentMeans|cac:PayeeFinancialAccount|cbc:ID","HR1210010051863000160")
xmlToSign.UpdateChildContent("cac:PaymentTerms|cbc:Note","Neki uvjeti placanja")
xmlToSign.UpdateAttrAt("cac:TaxTotal|cbc:TaxAmount",True,"currencyID","HRK")
xmlToSign.UpdateChildContent("cac:TaxTotal|cbc:TaxAmount","25.00")
xmlToSign.UpdateAttrAt("cac:TaxTotal|cac:TaxSubtotal|cbc:TaxableAmount",True,"currencyID","HRK")
xmlToSign.UpdateChildContent("cac:TaxTotal|cac:TaxSubtotal|cbc:TaxableAmount","100.00")
xmlToSign.UpdateAttrAt("cac:TaxTotal|cac:TaxSubtotal|cbc:TaxAmount",True,"currencyID","HRK")
xmlToSign.UpdateChildContent("cac:TaxTotal|cac:TaxSubtotal|cbc:TaxAmount","25.00")
xmlToSign.UpdateChildContent("cac:TaxTotal|cac:TaxSubtotal|cac:TaxCategory|cbc:ID","S")
xmlToSign.UpdateChildContent("cac:TaxTotal|cac:TaxSubtotal|cac:TaxCategory|cbc:Percent","25")
xmlToSign.UpdateChildContent("cac:TaxTotal|cac:TaxSubtotal|cac:TaxCategory|cac:TaxScheme|cbc:ID","VAT")
xmlToSign.UpdateAttrAt("cac:LegalMonetaryTotal|cbc:LineExtensionAmount",True,"currencyID","HRK")
xmlToSign.UpdateChildContent("cac:LegalMonetaryTotal|cbc:LineExtensionAmount","100.00")
xmlToSign.UpdateAttrAt("cac:LegalMonetaryTotal|cbc:TaxExclusiveAmount",True,"currencyID","HRK")
xmlToSign.UpdateChildContent("cac:LegalMonetaryTotal|cbc:TaxExclusiveAmount","100.00")
xmlToSign.UpdateAttrAt("cac:LegalMonetaryTotal|cbc:TaxInclusiveAmount",True,"currencyID","HRK")
xmlToSign.UpdateChildContent("cac:LegalMonetaryTotal|cbc:TaxInclusiveAmount","125.00")
xmlToSign.UpdateAttrAt("cac:LegalMonetaryTotal|cbc:PayableAmount",True,"currencyID","HRK")
xmlToSign.UpdateChildContent("cac:LegalMonetaryTotal|cbc:PayableAmount","125.00")
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cbc:ID","1")
xmlToSign.UpdateAttrAt("cac:CreditNoteLine|cbc:CreditedQuantity",True,"unitCode","H87")
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cbc:CreditedQuantity","1.000")
xmlToSign.UpdateAttrAt("cac:CreditNoteLine|cbc:LineExtensionAmount",True,"currencyID","HRK")
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cbc:LineExtensionAmount","100.00")
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cbc:Description","Neki detaljniji opis proizvoda ide ovdje")
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cbc:Name","Neki proizvod")
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cac:OriginCountry|cbc:IdentificationCode","HR")
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cac:ClassifiedTaxCategory|cbc:ID","S")
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cac:ClassifiedTaxCategory|cbc:Percent","25")
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cac:ClassifiedTaxCategory|cac:TaxScheme|cbc:ID","VAT")
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cac:AdditionalItemProperty|cbc:Name","Boja")
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cac:AdditionalItemProperty|cbc:Value","Plava")
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cac:AdditionalItemProperty[1]|cbc:Name","Masa")
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Item|cac:AdditionalItemProperty[1]|cbc:Value","1,2 Kg")
xmlToSign.UpdateAttrAt("cac:CreditNoteLine|cac:Price|cbc:PriceAmount",True,"currencyID","HRK")
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Price|cbc:PriceAmount","100.000000")
xmlToSign.UpdateAttrAt("cac:CreditNoteLine|cac:Price|cbc:BaseQuantity",True,"unitCode","H87")
xmlToSign.UpdateChildContent("cac:CreditNoteLine|cac:Price|cbc:BaseQuantity","1.000")

# Use this online tool to generate XAdES code from a sample signed XML: 
# Generate Code to Creaet XAdES from Sample XAdES

# The following code was generated by the online tool.

gen = chilkat2.XmlDSigGen()

gen.SigLocation = "CreditNote|ext:UBLExtensions|ext:UBLExtension|ext:ExtensionContent|sig:UBLDocumentSignatures|sac:SignatureInformation"
gen.SigLocationMod = 0
gen.SigId = "Signature-7f4c4719515a4a0a8ce4d1b983a2ec69"
gen.SigNamespacePrefix = ""
gen.SigNamespaceUri = "http://www.w3.org/2000/09/xmldsig#"
gen.SignedInfoCanonAlg = "C14N"
gen.SignedInfoDigestMethod = "sha256"

# Create an Object to be added to the Signature.
object1 = chilkat2.Xml()
object1.Tag = "xades:QualifyingProperties"
object1.AddAttribute("xmlns:ds","http://www.w3.org/2000/09/xmldsig#")
object1.AddAttribute("xmlns:xades","http://uri.etsi.org/01903/v1.3.2#")
object1.AddAttribute("Target","#Signature-7f4c4719515a4a0a8ce4d1b983a2ec69")
object1.UpdateAttrAt("xades:SignedProperties",True,"Id","SignedProperties-6573207f4ad64b49b0310f7a9e2dfadc")
object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningTime","TO BE GENERATED BY CHILKAT")
# Note: It may be that http://www.w3.org/2001/04/xmlenc#sha256 is needed in the following line instead of http://www.w3.org/2000/09/xmldsig#sha1
object1.UpdateAttrAt("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestMethod",True,"Algorithm","http://www.w3.org/2000/09/xmldsig#sha1")
object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestValue","TO BE GENERATED BY CHILKAT")
object1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:IssuerSerialV2","TO BE GENERATED BY CHILKAT")
object1.UpdateAttrAt("xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat",True,"ObjectReference","")
object1.UpdateChildContent("xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:Description","document")
object1.UpdateChildContent("xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:MimeType","application/xml")
object1.UpdateChildContent("xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:Encoding","UTF-8")

gen.AddObject("",object1.GetXml(),"","")

# -------- Reference 1 --------
gen.AddSameDocRef("","sha256","","","")

# -------- Reference 2 --------
gen.AddObjectRef("SignedProperties-6573207f4ad64b49b0310f7a9e2dfadc","sha256","","","http://uri.etsi.org/01903#SignedProperties")

# Provide a certificate + private key. (PFX password is test123)
cert = chilkat2.Cert()
success = cert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123")
if (success != True):
    print(cert.LastErrorText)
    sys.exit()

gen.SetX509Cert(cert,True)

gen.KeyInfoType = "X509Data+KeyValue"
gen.X509Type = "IssuerSerial,SubjectName,SKI,Certificate"

# Load XML to be signed...
sbXml = chilkat2.StringBuilder()
xmlToSign.GetXmlSb(sbXml)

# Adding the "UBLDocumentSignatures" behavior causes the following Transform to be used for the 
# first Reference:   
#   <Transform Algorithm="http://www.w3.org/TR/1999/REC-xpath-19991116"><XPath>count(ancestor-or-self::sig:UBLDocumentSignatures | here()/ancestor::sig:UBLDocumentSignatures[1]) &gt; count(ancestor-or-self::sig:UBLDocumentSignatures)</XPath></Transform>
gen.Behaviors = "IndentedSignature,UBLDocumentSignatures"

# Sign the XML...
success = gen.CreateXmlDSigSb(sbXml)
if (success != True):
    print(gen.LastErrorText)
    sys.exit()

# -----------------------------------------------

# Save the signed XML to a file.
success = sbXml.WriteFile("qa_output/signedXml.xml","utf-8",False)

print(sbXml.GetAsString())

# ----------------------------------------
# Verify the signature we just produced...
verifier = chilkat2.XmlDSig()
success = verifier.LoadSignatureSb(sbXml)
if (success != True):
    print(verifier.LastErrorText)
    sys.exit()

# We should have just one signature..
numSigs = verifier.NumSignatures
verifyIdx = 0
while verifyIdx < numSigs :
    verifier.Selector = verifyIdx
    verified = verifier.VerifySignature(True)
    if (verified != True):
        print(verifier.LastErrorText)
        sys.exit()

    verifyIdx = verifyIdx + 1

print("The signature was successfully verified.")