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PKCS11 Find All Certificates on Smart Card or USB Token

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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.

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Dim success As Boolean
success = False

// 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

// 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 = False) Then
    System.DebugLog(pkcs11.LastErrorText)
    Return
End If

// Pass -1 for the slotID to open a session on the first non-empty slot.
Dim slotID As Int32
slotID = -1

// Open a session.
Dim readWrite As Boolean
readWrite = True
success = pkcs11.OpenSession(slotID,readWrite)
If (success = False) Then
    System.DebugLog(pkcs11.LastErrorText)
    Return
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 Int32
userType = 1
Dim pin As String
pin = "0000"
success = pkcs11.Login(userType,pin)
If (success = False) Then
    System.DebugLog(pkcs11.LastErrorText)
    success = pkcs11.CloseSession()
    Return
End If

// Call FindAllCerts to find all certificates on the smart card or USB token.
success = pkcs11.FindAllCerts()
If (success = False) Then
    System.DebugLog(pkcs11.LastErrorText)
    success = pkcs11.CloseSession()
    Return
End If

// The NumCerts property is set by FindAllCerts.
Dim numCerts As Int32
numCerts = pkcs11.NumCerts
System.DebugLog("Number of certs: " + Str(numCerts))

Dim privateKeyNote As String
Dim cert As New Chilkat.Cert
Dim i As Int32
i = 0
While i < numCerts
    success = pkcs11.GetCert(i,cert)
    privateKeyNote = ""
    If (cert.HasPrivateKey() = True) Then
        privateKeyNote = "(has private key)"
    End If

    System.DebugLog(Str(i) + ": " + privateKeyNote + " " + cert.SubjectDN)
    System.DebugLog(Str(i) + ": issuer: " + cert.IssuerDN)
    System.DebugLog("----")
    i = i + 1
Wend

// Revert to an unauthenticated session by calling Logout.
success = pkcs11.Logout()
If (success = False) Then
    System.DebugLog(pkcs11.LastErrorText)
    success = pkcs11.CloseSession()
    Return
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
    System.DebugLog(pkcs11.LastErrorText)
    Return
End If

System.DebugLog("Success.")