(VB.NET UWP/WinRT) PKCS11 Find All Certificates on Smart Card or USB Token

See more PKCS11 Examples

Sample code showing how to examine all the certificates on a smart card or USB token.

Note: This example requires Chilkat v9.5.0.88 or later.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

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

' Note: Chilkat's PKCS11 implementation runs on Windows, Linux, Mac OS X, and other supported operating systems.

Dim pkcs11 As New Chilkat.Pkcs11

pkcs11.SharedLibPath = "aetpkss1.dll"

Dim success As Boolean = pkcs11.Initialize()
If (success = False) Then
    Debug.WriteLine(pkcs11.LastErrorText)
    Exit Sub
End If


' We need to call Discover to get the slot ID.
' (A slot is a smart card reader or USB token.)
Dim onlyTokensPresent As Boolean = True
Dim json As New Chilkat.JsonObject
success = pkcs11.Discover(onlyTokensPresent,json)
If (success = False) Then
    Debug.WriteLine(pkcs11.LastErrorText)
    Exit Sub
End If


' Make sure we have at least one slot.
If (json.SizeOfArray("slot") <= 0) Then
    Debug.WriteLine("No occuplied slots.")
    Exit Sub
End If


' Get the ID of the 1st slot
Dim slotID As Integer = json.IntOf("slot[0].id")

' Open a session.
Dim readWrite As Boolean = True
success = pkcs11.OpenSession(slotID,readWrite)
If (success = False) Then
    Debug.WriteLine(pkcs11.LastErrorText)
    Exit Sub
End If


' Make it an authenticated session by calling Login.
' 
' If we don't authenticate, then we won't be able to see the private keys, and thus
' we won't know which certificates have an associated private key stored on the smart card.

' The smart card PIN is passed to the Login method.
' userType 1 indicates a "Normal User".
Dim userType As Integer = 1
Dim pin As String = "0000"
success = pkcs11.Login(userType,pin)
If (success = False) Then
    Debug.WriteLine(pkcs11.LastErrorText)
    success = pkcs11.CloseSession()
    Exit Sub
End If


' Call FindAllCerts to find all certificates on the smart card or USB token.
success = pkcs11.FindAllCerts()
If (success = False) Then
    Debug.WriteLine(pkcs11.LastErrorText)
    success = pkcs11.CloseSession()
    Exit Sub
End If


' The NumCerts property is set by FindAllCerts.
Dim numCerts As Integer = pkcs11.NumCerts
Debug.WriteLine("Number of certs: " & numCerts)

Dim privateKeyNote As String
Dim cert As New Chilkat.Cert
Dim i As Integer = 0
While i < numCerts
    pkcs11.GetCert(i,cert)
    privateKeyNote = ""
    If (cert.HasPrivateKey() = True) Then
        privateKeyNote = "(has private key)"
    End If

    Debug.WriteLine(i & ": " & privateKeyNote & " " & cert.SubjectDN)
    Debug.WriteLine(i & ": issuer: " & cert.IssuerDN)
    Debug.WriteLine("----")
    i = i + 1
End While

' Revert to an unauthenticated session by calling Logout.
success = pkcs11.Logout()
If (success = False) Then
    Debug.WriteLine(pkcs11.LastErrorText)
    success = pkcs11.CloseSession()
    Exit Sub
End If


' When finished, close the session.
' It is important to close the session (memory leaks will occur if the session is not properly closed).
success = pkcs11.CloseSession()
If (success = False) Then
    Debug.WriteLine(pkcs11.LastErrorText)
    Exit Sub
End If


Debug.WriteLine("Success.")