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(Go) Create JPK VAT metadata XMLDemonstrates how to create the JPK VAT metadata XML (InitUpload) that will be signed using XADES.
// 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> var success bool xml := chilkat.NewXml() xml.SetTag("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 := chilkat.NewBinData() success = bdXml.LoadFile("qa_data/xml_dsig/jpk_vat/JPK_VAT_3_v1-1_20181201-000.xml") if success != true { fmt.Println("Failed to load XML file.") xml.DisposeXml() bdXml.DisposeBinData() return } xml.UpdateChildContentInt("DocumentList|Document|ContentLength",bdXml.NumBytes()) crypt := chilkat.NewCrypt2() crypt.SetHashAlgorithm("sha256") crypt.SetEncodingMode("base64") xml.UpdateChildContent("DocumentList|Document|HashValue",*crypt.HashBdENC(bdXml)) // ------------------------------------------------------------ // Step 2: Create a Zip archive containing the XML. zip := chilkat.NewZip() // The filename we pass here doesn't matter because we won't actually be creating a .zip file. zip.NewZip("anything.zip") e := zip.AppendBd("JPK_VAT_3_v1-1_20181201-000.xml",bdXml) e.DisposeZipEntry() // Write the .zip file to a BinData object. bdZip := chilkat.NewBinData() zip.WriteBd(bdZip) // ------------------------------------------------------------ // Step 3: Generate a random 256-bit AES key (32-bytes) prng := chilkat.NewPrng() bdAesKey := chilkat.NewBinData() 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.SetCipherMode("cbc") crypt.SetKeyLength(256) crypt.SetCryptAlgorithm("aes") crypt.SetPaddingScheme(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 := chilkat.NewCert() success = cert.LoadFromFile("qa_data/pem/mf_public_rsa.pem") if success != true { fmt.Println(cert.LastErrorText()) xml.DisposeXml() bdXml.DisposeBinData() crypt.DisposeCrypt2() zip.DisposeZip() bdZip.DisposeBinData() prng.DisposePrng() bdAesKey.DisposeBinData() cert.DisposeCert() return } pubKey := cert.ExportPublicKey() rsa := chilkat.NewRsa() rsa.ImportPublicKeyObj(pubKey) pubKey.DisposePublicKey() rsa.SetEncodingMode("base64") rsa.SetLittleEndian(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.SetHashAlgorithm("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() fmt.Println(*finalXml) xml.SaveXml("qa_output/jpk_vat.xml") fmt.Println("Finished.") xml.DisposeXml() bdXml.DisposeBinData() crypt.DisposeCrypt2() zip.DisposeZip() bdZip.DisposeBinData() prng.DisposePrng() bdAesKey.DisposeBinData() cert.DisposeCert() rsa.DisposeRsa() |
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