Visual Basic 6.0

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.

Visual Basic 6.0

Dim success As Long
success = 0

' 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 ChilkatPkcs11

' Set your shared lib path -- either a full path to the DLL, .so, or .dylib,
' or just the filename if the driver is in a location that can be automatically found. (Such as in C:\Windows\System32)
pkcs11.SharedLibPath = "aetpkss1.dll"

success = pkcs11.Initialize()
If (success = 0) Then
    Debug.Print pkcs11.LastErrorText
    Exit Sub
End If

' Pass -1 for the slotID to open a session on the first non-empty slot.
Dim slotID As Long
slotID = -1

' Open a session.
Dim readWrite As Long
readWrite = 1
success = pkcs11.OpenSession(slotID,readWrite)
If (success = 0) Then
    Debug.Print 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 Long
userType = 1
Dim pin As String
pin = "0000"
success = pkcs11.Login(userType,pin)
If (success = 0) Then
    Debug.Print 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 = 0) Then
    Debug.Print pkcs11.LastErrorText
    success = pkcs11.CloseSession()
    Exit Sub
End If

' The NumCerts property is set by FindAllCerts.
Dim numCerts As Long
numCerts = pkcs11.NumCerts
Debug.Print "Number of certs: " & numCerts

Dim privateKeyNote As String
Dim cert As New ChilkatCert
Dim i As Long
i = 0
Do While i < numCerts
    success = pkcs11.GetCert(i,cert)
    privateKeyNote = ""
    If (cert.HasPrivateKey() = 1) Then
        privateKeyNote = "(has private key)"
    End If

    Debug.Print i & ": " & privateKeyNote & " " & cert.SubjectDN
    Debug.Print i & ": issuer: " & cert.IssuerDN
    Debug.Print "----"
    i = i + 1
Loop

' Revert to an unauthenticated session by calling Logout.
success = pkcs11.Logout()
If (success = 0) Then
    Debug.Print 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 = 0) Then
    Debug.Print pkcs11.LastErrorText
    Exit Sub
End If

Debug.Print "Success."