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(MFC) Create JPK VAT metadata XMLDemonstrates how to create the JPK VAT metadata XML (InitUpload) that will be signed using XADES.
#include <CkXml.h> #include <CkBinData.h> #include <CkCrypt2.h> #include <CkZip.h> #include <CkZipEntry.h> #include <CkPrng.h> #include <CkCert.h> #include <CkPublicKey.h> #include <CkRsa.h> void ChilkatSample(void) { CkString strOut; // 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> bool success; CkXml xml; xml.put_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 CkBinData bdXml; success = bdXml.LoadFile("qa_data/xml_dsig/jpk_vat/JPK_VAT_3_v1-1_20181201-000.xml"); if (success != true) { strOut.append("Failed to load XML file."); strOut.append("\r\n"); SetDlgItemText(IDC_EDIT1,strOut.getUnicode()); return; } xml.UpdateChildContentInt("DocumentList|Document|ContentLength",bdXml.get_NumBytes()); CkCrypt2 crypt; crypt.put_HashAlgorithm("sha256"); crypt.put_EncodingMode("base64"); xml.UpdateChildContent("DocumentList|Document|HashValue",crypt.hashBdENC(bdXml)); // ------------------------------------------------------------ // Step 2: Create a Zip archive containing the XML. CkZip zip; // The filename we pass here doesn't matter because we won't actually be creating a .zip file. zip.NewZip("anything.zip"); CkZipEntry *e = zip.AppendBd("JPK_VAT_3_v1-1_20181201-000.xml",bdXml); delete e; // Write the .zip file to a BinData object. CkBinData bdZip; zip.WriteBd(bdZip); // ------------------------------------------------------------ // Step 3: Generate a random 256-bit AES key (32-bytes) CkPrng prng; CkBinData bdAesKey; prng.GenRandomBd(32,bdAesKey); const char *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.put_CipherMode("cbc"); crypt.put_KeyLength(256); crypt.put_CryptAlgorithm("aes"); crypt.put_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.get_NumBytes()); // ------------------------------------------------------------ // Step 4: RSA Encrypt the AES key using the public key certificate provided by the Ministry of Finance CkCert cert; success = cert.LoadFromFile("qa_data/pem/mf_public_rsa.pem"); if (success != true) { strOut.append(cert.lastErrorText()); strOut.append("\r\n"); SetDlgItemText(IDC_EDIT1,strOut.getUnicode()); return; } CkPublicKey *pubKey = cert.ExportPublicKey(); CkRsa rsa; rsa.ImportPublicKeyObj(*pubKey); delete pubKey; rsa.put_EncodingMode("base64"); rsa.put_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.put_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). const char *finalXml = xml.getXml(); strOut.append(finalXml); strOut.append("\r\n"); xml.SaveXml("qa_output/jpk_vat.xml"); strOut.append("Finished."); strOut.append("\r\n"); SetDlgItemText(IDC_EDIT1,strOut.getUnicode()); } |
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