(Xojo Plugin) DKIM Signature using Windows Current User Certificate Store

This is a Windows-specific example to load a certificate from the Current User (registry-based) certificate store, and then use the certificate's associated private key for a DKIM signature.

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

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

Dim cert As New Chilkat.Cert

// The LoadByCommonName method searches the Windows Local Machine and Current User 
// registry-based certificate stores for a certificate having the common name specified. 
// If found, the certificate is loaded and ready for use.
Dim success As Boolean
success = cert.LoadByCommonName("My Certificate ABC")
If (success <> True) Then
    System.DebugLog(cert.LastErrorText)
    Return
End If

// The certificate must have an associated private key installed, and it must be a
// private key that has been marked "exportable" when it was originally installed.
If (Not cert.HasPrivateKey()) Then
    System.DebugLog("This certificate does not have a private key available.")
    Return
End If

Dim privKey As Chilkat.PrivateKey

privKey = cert.ExportPrivateKey()
If (cert.LastMethodSuccess = False) Then
    System.DebugLog(cert.LastErrorText)
    Return
End If

Dim dkim As New Chilkat.Dkim

// Load the private key into the DKIM object:
success = dkim.LoadDkimPk(privKey.GetPkcs8Pem(),"")
If (success <> True) Then
    System.DebugLog(dkim.LastErrorText)
    Return
End If

// The private key has been loaded into the DKIM object.  See the other DKIM
// examples for guidance on how to create a DKIM signature...