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(Xojo Plugin) Signed Zip as Base64 with XAdES-BESThis example is to help companies implement a solution for sending XAdES-BES to the Polish government for reporting purposes. Specifically: Przed podpisaniem deklaracja zbiorcza (PIT-11Z, PIT-8CZ, PIT-40Z, PIT-RZ) musi zostać The example demonstrates the following:
This example will also show the reverse:
// This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // Zip the PIT-11Z.xml to create PIT-11Z.zip (not as a .zip file, but in-memory). Dim sbXmlToZip As New Chilkat.StringBuilder Dim success As Boolean success = sbXmlToZip.LoadFile("qa_data/xml/PIT-11Z.xml","utf-8") If (success <> True) Then System.DebugLog("Failed to load the XML to be zipped.") Return End If Dim zip As New Chilkat.Zip // Initialize the zip object. No file is created in this call. // It should always return True. success = zip.NewZip("PIT-11Z.zip") // Add the XML to be zipped. Dim entry As Chilkat.ZipEntry entry = zip.AppendString("PIT-11Z.xml",sbXmlToZip.GetAsString()) // Write the zip to a BinData object. Dim bdZip As New Chilkat.BinData success = zip.WriteBd(bdZip) // The contents of the bdZip will be retrieved in base64 format when needed below.. Dim gen As New Chilkat.XmlDSigGen gen.SigLocation = "" gen.SigLocationMod = 0 gen.SigId = "Signature_2a8df7f8-b958-40cc-83f6-edb53b837347_19" gen.SigNamespacePrefix = "ds" gen.SigNamespaceUri = "http://www.w3.org/2000/09/xmldsig#" gen.SigValueId = "SignatureValue_2a8df7f8-b958-40cc-83f6-edb53b837347_52" gen.SignedInfoId = "SignedInfo_2a8df7f8-b958-40cc-83f6-edb53b837347_41" gen.SignedInfoCanonAlg = "C14N" gen.SignedInfoDigestMethod = "sha1" // Set the KeyInfoId before adding references.. gen.KeyInfoId = "KeyInfo_2a8df7f8-b958-40cc-83f6-edb53b837347_24" // Create an Object to be added to the Signature. Dim object1 As New Chilkat.Xml object1.Tag = "xades:QualifyingProperties" success = object1.AddAttribute("xmlns:xades","http://uri.etsi.org/01903/v1.3.2#") success = object1.AddAttribute("Id","QualifyingProperties_2a8df7f8-b958-40cc-83f6-edb53b837347_43") success = object1.AddAttribute("Target","#Signature_2a8df7f8-b958-40cc-83f6-edb53b837347_19") success = object1.UpdateAttrAt("xades:SignedProperties",True,"Id","SignedProperties_2a8df7f8-b958-40cc-83f6-edb53b837347_4e") success = object1.UpdateAttrAt("xades:SignedProperties|xades:SignedSignatureProperties",True,"Id","SignedSignatureProperties_2a8df7f8-b958-40cc-83f6-edb53b837347_0a") // Chilkat will replace the strings "TO BE GENERATED BY CHILKAT" with actual values when the signature is created. 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 success = object1.UpdateAttrAt("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestMethod",True,"Algorithm","http://www.w3.org/2000/09/xmldsig#sha1") 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" success = object1.UpdateAttrAt("xades:SignedProperties|xades:SignedDataObjectProperties",True,"Id","SignedDataObjectProperties_2a8df7f8-b958-40cc-83f6-edb53b837347_4b") success = object1.UpdateAttrAt("xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat",True,"ObjectReference","#Reference1_2a8df7f8-b958-40cc-83f6-edb53b837347_27") object1.UpdateChildContent "xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:Description","MIME-Version: 1.0" + EndOfLine.Windows + "Content-Type: application/zip" + EndOfLine.Windows + "Content-Transfer-Encoding: binary" + EndOfLine.Windows + "Content-Disposition: filename="PIT-11Z.zip"" success = object1.UpdateAttrAt("xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:ObjectIdentifier|xades:Identifier",True,"Qualifier","OIDAsURI") object1.UpdateChildContent "xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:ObjectIdentifier|xades:Identifier","http://www.certum.pl/OIDAsURI/signedFile/1.2.616.1.113527.3.1.1.3.1" object1.UpdateChildContent "xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:ObjectIdentifier|xades:Description","Opis formatu dokumentu oraz jego pelna nazwa" object1.UpdateChildContent "xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:ObjectIdentifier|xades:DocumentationReferences|xades:DocumentationReference","http://www.certum.pl/OIDAsURI/signedFile.pdf" object1.UpdateChildContent "xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:MimeType","application/zip" object1.UpdateChildContent "xades:SignedProperties|xades:SignedDataObjectProperties|xades:CommitmentTypeIndication|xades:CommitmentTypeId|xades:Identifier","http://uri.etsi.org/01903/v1.2.2#ProofOfApproval" object1.UpdateChildContent "xades:SignedProperties|xades:SignedDataObjectProperties|xades:CommitmentTypeIndication|xades:AllSignedDataObjects","" success = object1.UpdateAttrAt("xades:UnsignedProperties",True,"Id","UnsignedProperties_2a8df7f8-b958-40cc-83f6-edb53b837347_55") // Emit XML in compact (single-line) format to avoid whitespace problems. object1.EmitCompact = True success = gen.AddObject("",object1.GetXml(),"","") // Create an Object to be added to the Signature. // This is where we add the base64 representation of the PIT-11Z.zip success = gen.AddObject("Object1_2a8df7f8-b958-40cc-83f6-edb53b837347",bdZip.GetEncoded("base64"),"","http://www.w3.org/2000/09/xmldsig#base64") // -------- Reference 1 -------- success = gen.AddObjectRef("Object1_2a8df7f8-b958-40cc-83f6-edb53b837347","sha1","C14N_WithComments","","") success = gen.SetRefIdAttr("Object1_2a8df7f8-b958-40cc-83f6-edb53b837347","Reference1_2a8df7f8-b958-40cc-83f6-edb53b837347_27") // -------- Reference 2 -------- success = gen.AddObjectRef("SignedProperties_2a8df7f8-b958-40cc-83f6-edb53b837347_4e","sha1","","","http://uri.etsi.org/01903#SignedProperties") success = gen.SetRefIdAttr("SignedProperties_2a8df7f8-b958-40cc-83f6-edb53b837347_4e","SignedProperties-Reference_2a8df7f8-b958-40cc-83f6-edb53b837347_28") // Provide a certificate + private key. (PFX password is test123) Dim cert As New Chilkat.Cert success = cert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123") If (success <> True) Then System.DebugLog(cert.LastErrorText) Return End If success = gen.SetX509Cert(cert,True) gen.KeyInfoType = "X509Data" gen.X509Type = "Certificate" // This will be an enveloping signature where the Signature element // is the XML document root, the signed data is contained within Object // tag(s) within the Signature. // Therefore, pass an empty sbXml to CreateXmlDsigSb. Dim sbXml As New Chilkat.StringBuilder // The Polish government's XmlDSig implementation requires that we reproduce an attribute-sorting error. // (This is an error in the XML canonicalization that is not noticed when both the signature-creation code and signature-verification code use // the same XML canonicalization implementation w/ the bug.) gen.Behaviors = "AttributeSortingBug,CompactSignedXml" // Sign the XML... success = gen.CreateXmlDSigSb(sbXml) If (success <> True) Then System.DebugLog(gen.LastErrorText) Return End If // ----------------------------------------------- // Save the signed XML to a file. success = sbXml.WriteFile("qa_output/signedXml.xml","utf-8",False) System.DebugLog(sbXml.GetAsString()) // ---------------------------------------- // Verify the signature we just produced... Dim verifier As New Chilkat.XmlDSig success = verifier.LoadSignatureSb(sbXml) If (success <> True) Then System.DebugLog(verifier.LastErrorText) Return End If Dim verified As Boolean verified = verifier.VerifySignature(True) If (verified <> True) Then System.DebugLog(verifier.LastErrorText) Return End If System.DebugLog("This signature was successfully verified.") // ------------------------------------ // Finally, let's extract the .zip from the signed XML, and then unzip the original PIT-11Z.xml from the in-memory zip. Dim xml As New Chilkat.Xml success = xml.LoadSb(sbXml,True) // The base64 image of the PIT-11Z.zip is in the 2nd ds:Object child of the ds:Signature (the ds:Signature is the root element of the signed XML). // (ds:Object[0] would be the 1st ds:Object child. Index 1 is the 2nd ds:Object child.) Dim strZipBase64 As String strZipBase64 = xml.GetChildContent("ds:Object[1]") success = bdZip.Clear() success = bdZip.AppendEncoded(strZipBase64,"base64") If (bdZip.NumBytes = 0) Then System.DebugLog("Something went wrong.. we dont' have any data..") Return End If success = zip.OpenBd(bdZip) If (success <> True) Then System.DebugLog(zip.LastErrorText) Return End If // Get the 1st file in the zip, which should be the PIT-11Z.xml entry = zip.GetEntryByIndex(0) If (zip.LastMethodSuccess <> True) Then System.DebugLog("Zip contains no files...") Return End If // Get the XML: Dim origXml As String origXml = entry.UnzipToString(0,"utf-8") System.DebugLog("Original XML extracted from base64 zip:") System.DebugLog(origXml) |
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