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(Chilkat2-Python) Create JPK VAT metadata XMLDemonstrates how to create the JPK VAT metadata XML (InitUpload) that will be signed using XADES.
import sys import chilkat2 # This example requires the Chilkat API to have been previously unlocked. # See Global Unlock Sample for sample code. # First build an InitUpload XML template # Use this online tool to generate the code from the sample XML below: # Generate Code to Create XML # <InitUpload xmlns="http://e-dokumenty.mf.gov.pl"> # <DocumentType>JPK</DocumentType> # <Version>01.02.01.20160617</Version> # <EncryptionKey algorithm="RSA" encoding="Base64" mode="ECB" padding="PKCS#1">F9EhKFec...uWqAWUIg==</EncryptionKey> # <DocumentList> # <Document> # <FormCode schemaVersion="1-1" systemCode="JPK_VAT (3)">JPK_VAT</FormCode> # <FileName>JPK_VAT_3_v1-1_20181201.xml</FileName> # <ContentLength>8736</ContentLength> # <HashValue algorithm="SHA-256" encoding="Base64">JFDI1pItwh6dj/Xe1uts/x61qnjZ4DLHpkZMhmf1oKQ=</HashValue> # <FileSignatureList filesNumber="1"> # <Packaging> # <SplitZip mode="zip" type="split"/> # </Packaging> # <Encryption> # <AES block="16" mode="CBC" padding="PKCS#7" size="256"> # <IV bytes="16" encoding="Base64">z64oN9zXHt1+S3XACRSCYw==</IV> # </AES> # </Encryption> # <FileSignature> # <OrdinalNumber>1</OrdinalNumber> # <FileName>JPK_VAT_3_v1-1_20181201-000.xml.zip.aes</FileName> # <ContentLength>16</ContentLength> # <HashValue algorithm="MD5" encoding="Base64">5NX0q1935fvMjLFV7E1yDw==</HashValue> # </FileSignature> # </FileSignatureList> # </Document> # </DocumentList> # </InitUpload> xml = chilkat2.Xml() xml.Tag = "InitUpload" xml.AddAttribute("xmlns","http://e-dokumenty.mf.gov.pl") xml.UpdateChildContent("DocumentType","JPK") xml.UpdateChildContent("Version","01.02.01.20160617") xml.UpdateAttrAt("EncryptionKey",True,"algorithm","RSA") xml.UpdateAttrAt("EncryptionKey",True,"encoding","Base64") xml.UpdateAttrAt("EncryptionKey",True,"mode","ECB") xml.UpdateAttrAt("EncryptionKey",True,"padding","PKCS#1") xml.UpdateChildContent("EncryptionKey","TO BE DETERMINED") xml.UpdateAttrAt("DocumentList|Document|FormCode",True,"schemaVersion","1-1") xml.UpdateAttrAt("DocumentList|Document|FormCode",True,"systemCode","JPK_VAT (3)") xml.UpdateChildContent("DocumentList|Document|FormCode","JPK_VAT") xml.UpdateChildContent("DocumentList|Document|FileName","JPK_VAT_3_v1-1_20181201.xml") xml.UpdateChildContent("DocumentList|Document|ContentLength","9999") xml.UpdateAttrAt("DocumentList|Document|HashValue",True,"algorithm","SHA-256") xml.UpdateAttrAt("DocumentList|Document|HashValue",True,"encoding","Base64") xml.UpdateChildContent("DocumentList|Document|HashValue","TO BE DETERMINED") xml.UpdateAttrAt("DocumentList|Document|FileSignatureList",True,"filesNumber","1") xml.UpdateAttrAt("DocumentList|Document|FileSignatureList|Packaging|SplitZip",True,"mode","zip") xml.UpdateAttrAt("DocumentList|Document|FileSignatureList|Packaging|SplitZip",True,"type","split") xml.UpdateAttrAt("DocumentList|Document|FileSignatureList|Encryption|AES",True,"block","16") xml.UpdateAttrAt("DocumentList|Document|FileSignatureList|Encryption|AES",True,"mode","CBC") xml.UpdateAttrAt("DocumentList|Document|FileSignatureList|Encryption|AES",True,"padding","PKCS#7") xml.UpdateAttrAt("DocumentList|Document|FileSignatureList|Encryption|AES",True,"size","256") xml.UpdateAttrAt("DocumentList|Document|FileSignatureList|Encryption|AES|IV",True,"bytes","16") xml.UpdateAttrAt("DocumentList|Document|FileSignatureList|Encryption|AES|IV",True,"encoding","Base64") xml.UpdateChildContent("DocumentList|Document|FileSignatureList|Encryption|AES|IV","TO BE DETERMINED") xml.UpdateChildContent("DocumentList|Document|FileSignatureList|FileSignature|OrdinalNumber","1") xml.UpdateChildContent("DocumentList|Document|FileSignatureList|FileSignature|FileName","JPK_VAT_3_v1-1_20181201-000.xml.zip.aes") xml.UpdateChildContent("DocumentList|Document|FileSignatureList|FileSignature|ContentLength","9999") xml.UpdateAttrAt("DocumentList|Document|FileSignatureList|FileSignature|HashValue",True,"algorithm","MD5") xml.UpdateAttrAt("DocumentList|Document|FileSignatureList|FileSignature|HashValue",True,"encoding","Base64") xml.UpdateChildContent("DocumentList|Document|FileSignatureList|FileSignature|HashValue","TO BE DETERMINED") # ------------------------------------------------------------ # Step 1: Load our JPK_VAT XML and update the DocumentList|Document|HashValue # and DocumentList|Document|ContentLength bdXml = chilkat2.BinData() success = bdXml.LoadFile("qa_data/xml_dsig/jpk_vat/JPK_VAT_3_v1-1_20181201-000.xml") if (success != True): print("Failed to load XML file.") sys.exit() xml.UpdateChildContentInt("DocumentList|Document|ContentLength",bdXml.NumBytes) crypt = chilkat2.Crypt2() crypt.HashAlgorithm = "sha256" crypt.EncodingMode = "base64" xml.UpdateChildContent("DocumentList|Document|HashValue",crypt.HashBdENC(bdXml)) # ------------------------------------------------------------ # Step 2: Create a Zip archive containing the XML. zip = chilkat2.Zip() # The filename we pass here doesn't matter because we won't actually be creating a .zip file. zip.NewZip("anything.zip") # e is a CkZipEntry e = zip.AppendBd("JPK_VAT_3_v1-1_20181201-000.xml",bdXml) # Write the .zip file to a BinData object. bdZip = chilkat2.BinData() zip.WriteBd(bdZip) # ------------------------------------------------------------ # Step 3: Generate a random 256-bit AES key (32-bytes) prng = chilkat2.Prng() bdAesKey = chilkat2.BinData() prng.GenRandomBd(32,bdAesKey) ivBytes = prng.GenRandom(16,"base64") # Store the IV (base64 string) in the XML. xml.UpdateChildContent("DocumentList|Document|FileSignatureList|Encryption|AES|IV",ivBytes) # ------------------------------------------------------------ # Step 4: AES encrypt our zip archive (the contents of bdZip) crypt.CipherMode = "cbc" crypt.KeyLength = 256 crypt.CryptAlgorithm = "aes" crypt.PaddingScheme = 0 crypt.SetEncodedIV(ivBytes,"base64") crypt.SetEncodedKey(bdAesKey.GetEncoded("base64"),"base64") # AES by definition has a block size of 16. crypt.EncryptBd(bdZip) # bdZip now contains the AES encrypted data. # Note: This is NOT the same as a zip where the contents are AES encrypted. # In that case, we have an unencrypted zip structure with AES encrypted files within. # In our case, the entire zip file image is encrypted. # Save the bdZip to a file. This is what will get sent to e-dokumenty.mf.gov.pl success = bdZip.WriteFile("qa_output/JPK_VAT_3_v1-1_20181201-000.xml.zip.aes") xml.UpdateChildContentInt("DocumentList|Document|FileSignatureList|FileSignature|ContentLength",bdZip.NumBytes) # ------------------------------------------------------------ # Step 4: RSA Encrypt the AES key using the public key certificate provided by the Ministry of Finance cert = chilkat2.Cert() success = cert.LoadFromFile("qa_data/pem/mf_public_rsa.pem") if (success != True): print(cert.LastErrorText) sys.exit() # pubKey is a CkPublicKey pubKey = cert.ExportPublicKey() rsa = chilkat2.Rsa() rsa.ImportPublicKeyObj(pubKey) rsa.EncodingMode = "base64" rsa.LittleEndian = False # in-place RSA encrypt the contents of bdAesKey. rsa.EncryptBd(bdAesKey,False) xml.UpdateChildContent("EncryptionKey",bdAesKey.GetEncoded("base64")) # Step 5: We forgot to get the MD5 hash of the AES encrypted zip. # (I'm assuming we need the MD5 of the encrypted zip as opposed to the MD5 of the pre-encrypted zip..) crypt.HashAlgorithm = "md5" xml.UpdateChildContent("DocumentList|Document|FileSignatureList|FileSignature|HashValue",crypt.HashBdENC(bdZip)) # At this point, the XML is prepared and the AES encrypted image of the zip file is written # to a file (and also in bdZip). finalXml = xml.GetXml() print(finalXml) xml.SaveXml("qa_output/jpk_vat.xml") print("Finished.") |
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