Find Certificates that can be used for Signing

Download Chilkat Crypt ActiveX

This ASP script shows how to iterate over the certificates on a computer to find those that can be used for signing.

<html><body>
<%

    ' What certificates exist on my computer, and which
    ' ones can I use for creating digital signatures?
    set ccs = Server.CreateObject("Chilkat.CreateCS")
    
    set crypt = Server.CreateObject("Chilkat.Crypt2")
    
    unlocked = crypt.UnlockComponent("anything begins 30-day trial")
    If unlocked = 0 Then
        ' Failed to unlock...
    End If
    
    ' Use the Microsoft Enhanced Cryptographic Service Provider
    ' Add a reference to ChilkatUtil for the ChilkatCSP object
    set csp = Server.CreateObject("ChilkatUtil.ChilkatCSP")
    csp.SetProviderMicrosoftEnhanced
    crypt.SetCSP csp
    
    ' -------------------------------------------------------
    ' Check the local machine certificate store.
    ' -------------------------------------------------------
    Set certStore = ccs.OpenLocalSystemStore()
    
    Response.write "<b>Local Machine Certificate Store</b>"
    Response.write "<table border=1>"
    
    For i = 0 To certStore.NumCertificates - 1
        Set cert = certStore.GetCertificate(i)
        
        Response.write "<tr><td>"
        
        ' Display the certificate we are testing..
        Response.write "<font size='+1'><b>" & cert.SubjectDN & "</b></font><br>"
        
        ' Set the certificate to be used for signing, and our output string encoding.
        crypt.SetSigningCert cert
        crypt.EncodingMode = "base64"
        
        ' Try signing....
        signature = crypt.SignStringENC("This is a test")
        If Len(signature) = 0 Then
            ' Failed to create signature
            Response.write "FAILED<br>"
            If cert.HasPrivateKey() = 0 Then
                Response.write "NO PRIVATE KEY<br>"
            End If
            Response.write "<p>" & crypt.LastErrorHtml
        Else
            Response.write "SUCCESS!<br>"
            Response.write "<p>" & crypt.LastErrorHtml
        End If
        
        Response.write "</td></tr>"
    Next
    
    Response.write "</table>"
    


%>

</body></html>

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