Chilkat Examples

ChilkatHOME.NET Core C#Android™AutoItCC#C++Chilkat2-PythonCkPythonClassic ASPDataFlexDelphi ActiveXDelphi DLLGoJavaLianjaMono C#Node.jsObjective-CPHP ActiveXPHP ExtensionPerlPowerBuilderPowerShellPureBasicRubySQL ServerSwift 2Swift 3,4,5...TclUnicode CUnicode C++VB.NETVBScriptVisual Basic 6.0Visual FoxProXojo Plugin

VB.NET Examples

Web API Categories

ASN.1
AWS KMS
AWS Misc
Amazon EC2
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Key Vault
Azure Service Bus
Azure Table Service
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Code Signing
Compression
DKIM / DomainKey
DNS
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
EBICS
ECC
Ed25519
Email Object
Encryption
FTP
FileAccess
Firebase
GMail REST API
GMail SMTP/IMAP/POP
Geolocation
Google APIs
Google Calendar
Google Cloud SQL
Google Cloud Storage
Google Drive
Google Photos
Google Sheets
Google Tasks
Gzip
HTML-to-XML/Text
HTTP

HTTP Misc
IMAP
JSON
JSON Web Encryption (JWE)
JSON Web Signatures (JWS)
JSON Web Token (JWT)
Java KeyStore (JKS)
MHT / HTML Email
MIME
MS Storage Providers
Microsoft Graph
Misc
NTLM
OAuth1
OAuth2
OIDC
Office365
OneDrive
OpenSSL
Outlook
Outlook Calendar
Outlook Contact
PDF Signatures
PEM
PFX/P12
PKCS11
POP3
PRNG
REST
REST Misc
RSA
SCP
SCard
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
ScMinidriver
SharePoint
SharePoint Online
Signing in the Cloud
Socket/SSL/TLS
Spider
Stream
Tar Archive
ULID/UUID
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(VB.NET) Signed Zip as Base64 with XAdES-BES

This 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
umieszczona w archiwum ZIP. W tym przypadku, podpisywany jest plik archiwum ZIP,
przyjmujący w podpisie XAdES-BES formę zakodowaną base64.

The example demonstrates the following:

  1. Zip an XML file (PIT-11Z.xml is zipped to PIT-11Z.zip)
  2. Create XML to be signed, where the XML contains the base64 encoded content of the PIT-11Z.zip archive.
  3. XAdES-BES sign the XML containing the base64 zip.

This example will also show the reverse:

  1. Verify the signed XML.
  2. Extract the PIT-11z.zip from the signed XML.
  3. Unzip the PIT-11Z.zip to get the original PIT-11Z.xml

Chilkat .NET Downloads

Chilkat .NET Assemblies

Chilkat for .NET Core

Chilkat for Mono

' 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 = sbXmlToZip.LoadFile("qa_data/xml/PIT-11Z.xml","utf-8")
If (success <> True) Then
    Debug.WriteLine("Failed to load the XML to be zipped.")
    Exit Sub
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 = zip.AppendString("PIT-11Z.xml",sbXmlToZip.GetAsString())


' Write the zip to a BinData object.
Dim bdZip As New Chilkat.BinData
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"
object1.AddAttribute("xmlns:xades","http://uri.etsi.org/01903/v1.3.2#")
object1.AddAttribute("Id","QualifyingProperties_2a8df7f8-b958-40cc-83f6-edb53b837347_43")
object1.AddAttribute("Target","#Signature_2a8df7f8-b958-40cc-83f6-edb53b837347_19")
object1.UpdateAttrAt("xades:SignedProperties",True,"Id","SignedProperties_2a8df7f8-b958-40cc-83f6-edb53b837347_4e")
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
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")
object1.UpdateAttrAt("xades:SignedProperties|xades:SignedDataObjectProperties",True,"Id","SignedDataObjectProperties_2a8df7f8-b958-40cc-83f6-edb53b837347_4b")
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" & vbCrLf & "Content-Type: application/zip" & vbCrLf & "Content-Transfer-Encoding: binary" & vbCrLf & "Content-Disposition: filename=&quot;PIT-11Z.zip&quot;")
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","")
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
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
gen.AddObject("Object1_2a8df7f8-b958-40cc-83f6-edb53b837347",bdZip.GetEncoded("base64"),"","http://www.w3.org/2000/09/xmldsig#base64")


' -------- Reference 1 --------
gen.AddObjectRef("Object1_2a8df7f8-b958-40cc-83f6-edb53b837347","sha1","C14N_WithComments","","")
gen.SetRefIdAttr("Object1_2a8df7f8-b958-40cc-83f6-edb53b837347","Reference1_2a8df7f8-b958-40cc-83f6-edb53b837347_27")

' -------- Reference 2 --------
gen.AddObjectRef("SignedProperties_2a8df7f8-b958-40cc-83f6-edb53b837347_4e","sha1","","","http://uri.etsi.org/01903#SignedProperties")
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
    Debug.WriteLine(cert.LastErrorText)
    Exit Sub
End If

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
    Debug.WriteLine(gen.LastErrorText)
    Exit Sub
End If

' -----------------------------------------------

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

Debug.WriteLine(sbXml.GetAsString())

' ----------------------------------------
' Verify the signature we just produced...
Dim verifier As New Chilkat.XmlDSig
success = verifier.LoadSignatureSb(sbXml)
If (success <> True) Then
    Debug.WriteLine(verifier.LastErrorText)
    Exit Sub
End If


Dim verified As Boolean = verifier.VerifySignature(True)
If (verified <> True) Then
    Debug.WriteLine(verifier.LastErrorText)
    Exit Sub
End If

Debug.WriteLine("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
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 = xml.GetChildContent("ds:Object[1]")

bdZip.Clear()
bdZip.AppendEncoded(strZipBase64,"base64")
If (bdZip.NumBytes = 0) Then
    Debug.WriteLine("Something went wrong.. we dont' have any data..")
    Exit Sub
End If


success = zip.OpenBd(bdZip)
If (success <> True) Then
    Debug.WriteLine(zip.LastErrorText)
    Exit Sub
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
    Debug.WriteLine("Zip contains no files...")
    Exit Sub
End If


' Get the XML:
Dim origXml As String = entry.UnzipToString(0,"utf-8")
Debug.WriteLine("Original XML extracted from base64 zip:")
Debug.WriteLine(origXml)



 

© 2000-2024 Chilkat Software, Inc. All Rights Reserved.