(Visual Basic 6.0) SII XML Digital Signature

Example for SII XML Digital Signature.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Dim success As Long
success = 1

' Load the XML to be signed.
Dim xmlToSign As New ChilkatXml
success = xmlToSign.LoadXmlFile("c:/aaworkarea/eduardo/sii_unsigned.xml")
If (success = 0) Then
    Debug.Print xmlToSign.LastErrorText
    Exit Sub
End If

' The sample XML to be signed looks like this:

' <?xml version="1.0" encoding="ISO-8859-1"?>
' <EnvioDTE xmlns="http://www.sii.cl/SiiDte" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.sii.cl/SiiDte EnvioDTE_v10.xsd" version="1.0">
' <SetDTE ID="SetDocF0T33_20240425_170512">
'  <Caratula version="1.0">
'   <RutEmisor>99999999-4</RutEmisor>
'   <RutEnvia>12345678-6</RutEnvia>
'   <RutReceptor>888888000-K</RutReceptor>
'   <FchResol>2014-08-22</FchResol>
'   <NroResol>80</NroResol>
'   <TmstFirmaEnv>2024-04-25T17:05:13</TmstFirmaEnv>
'   <SubTotDTE>
'    <TpoDTE>33</TpoDTE>
'    <NroDTE>1</NroDTE>
'   </SubTotDTE>
'  </Caratula>
' <DTE version="1.0">
' <Documento ID="F555T55">
' ...
' </Documento>
' </EnvioDTE>

Dim gen As New ChilkatXmlDSigGen

gen.SigLocation = "EnvioDTE|SetDTE|DTE"
gen.SigLocationMod = 0
gen.SigNamespacePrefix = ""
gen.SigNamespaceUri = "http://www.w3.org/2000/09/xmldsig#"
gen.SignedInfoCanonAlg = "C14N"
gen.SignedInfoDigestMethod = "sha1"

' -------- Reference 1 --------
Dim xml1 As New ChilkatXml
xml1.Tag = "Transforms"
success = xml1.UpdateAttrAt("Transform",1,"Algorithm","http://www.w3.org/TR/2001/REC-xml-c14n-20010315")

success = gen.AddSameDocRef2("F511T33","sha1",xml1,"")

' Provide a certificate + private key. (PFX password is test123)
Dim cert As New ChilkatCert
success = cert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123")
If (success <> 1) Then
    Debug.Print cert.LastErrorText
    Exit Sub
End If

success = gen.SetX509Cert(cert,1)

gen.KeyInfoType = "X509Data+KeyValue"
gen.X509Type = "Certificate"

' Load XML to be signed...
Dim sbXml As New ChilkatStringBuilder
success = xmlToSign.GetXmlSb(sbXml)

gen.Behaviors = "IndentedSignature"

' Sign the XML...
success = gen.CreateXmlDSigSb(sbXml)
If (success <> 1) Then
    Debug.Print gen.LastErrorText
    Exit Sub
End If

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

' Save the signed XML to a file.
success = sbXml.WriteFile("c:/temp/qa_output/signedXml.xml","utf-8",0)

Debug.Print sbXml.GetAsString()

' ----------------------------------------
' Verify the signatures we just produced...
Dim verifier As New ChilkatXmlDSig
success = verifier.LoadSignatureSb(sbXml)
If (success <> 1) Then
    Debug.Print verifier.LastErrorText
    Exit Sub
End If

Dim numSigs As Long
numSigs = verifier.NumSignatures
Dim verifyIdx As Long
verifyIdx = 0
Do While verifyIdx < numSigs
    verifier.Selector = verifyIdx
    Dim verified As Long
    verified = verifier.VerifySignature(1)
    If (verified <> 1) Then
        Debug.Print verifier.LastErrorText
        Exit Sub
    End If

    verifyIdx = verifyIdx + 1
Loop
Debug.Print "All signatures were successfully verified."