(Xojo Plugin) Sign Italian SPID Metadata XML

Demonstrates how to create an XML digital signature for Italian SPID Metadata.

Chilkat Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Dim success As Boolean
success = True

// Load the XML to be signed.
Dim sbXml As New Chilkat.StringBuilder
success = sbXml.LoadFile("qa_data/xml_dsig/spid_metadata.xml","utf-8")
If (success = False) Then
    System.DebugLog("Failed to load the input file.")
    Return
End If

// The XML to sign contains XML such as this:

// <?xml version="1.0" encoding="utf-8"?>
// <md:EntityDescriptor xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" entityID="https://***.it" ID="_AE17AFFF-A600-49D5-B81D-76EEA55B50FF">
//     <md:SPSSODescriptor protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol" AuthnRequestsSigned="true" WantAssertionsSigned="true">
//         <md:KeyDescriptor use="signing">
//             <ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
//                 <ds:X509Data>
//                     <ds:X509Certificate>MIIF5...</ds:X509Certificate>
//                 </ds:X509Data>
//             </ds:KeyInfo>
//         </md:KeyDescriptor>
//         <md:KeyDescriptor use="encryption">
//             <ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
//                 <ds:X509Data>
//                     <ds:X509Certificate>MIIF5...</ds:X509Certificate>
//                 </ds:X509Data>
//             </ds:KeyInfo>
//         </md:KeyDescriptor>
//         <md:SingleLogoutService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="https://***.it/it-it/spid/logout"/>
//         <md:NameIDFormat>urn:oasis:names:tc:SAML:2.0:nameid-format:transient</md:NameIDFormat>
//         <md:AssertionConsumerService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="https://***.it/it-it/spid/loginresp" index="0" isDefault="true"/>
//         <md:AttributeConsumingService index="1">
//             <md:ServiceName xml:lang="it">Servizi Online</md:ServiceName>
//             <md:ServiceDescription xml:lang="it">Accesso ai Servizi Online</md:ServiceDescription>
//             <md:RequestedAttribute Name="spidCode" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"/>
//             <md:RequestedAttribute Name="name" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"/>
//             <md:RequestedAttribute Name="familyName" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"/>
//             <md:RequestedAttribute Name="fiscalNumber" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"/>
//         </md:AttributeConsumingService>
//     </md:SPSSODescriptor>
//     <md:Organization>
//         <md:OrganizationName xml:lang="it">SomeCompany s.r.l.</md:OrganizationName>
//         <md:OrganizationDisplayName xml:lang="it">SomeCompany s.r.l.</md:OrganizationDisplayName>
//         <md:OrganizationURL xml:lang="it">https://***.it</md:OrganizationURL>
//     </md:Organization>
// </md:EntityDescriptor>

Dim gen As New Chilkat.XmlDSigGen

gen.SigLocation = "md:EntityDescriptor|md:SPSSODescriptor"
gen.SigLocationMod = 2
gen.SignedInfoCanonAlg = "EXCL_C14N"
gen.SignedInfoDigestMethod = "sha256"

// -------- Reference 1 --------
success = gen.AddSameDocRef("_AE17AFFF-A600-49D5-B81D-76EEA55B50FF","sha256","EXCL_C14N","","")

// 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+KeyValue"
gen.X509Type = "Certificate"

gen.Behaviors = "IndentedSignature,ForceAddEnvelopedSignatureTransform,OmitAlreadyDefinedSigNamespace"

// 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 signatures 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 numSigs As Int32
numSigs = verifier.NumSignatures
Dim verifyIdx As Int32
verifyIdx = 0
While verifyIdx < numSigs
    verifier.Selector = verifyIdx
    Dim verified As Boolean
    verified = verifier.VerifySignature(True)
    If (verified <> True) Then
        System.DebugLog(verifier.LastErrorText)
        Return
    End If

    verifyIdx = verifyIdx + 1
Wend
System.DebugLog("All signatures were successfully verified.")